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 */
97 #include "character.h"
101 #include "termhooks.h"
102 #include "termopts.h"
103 #include "commands.h"
104 #include "keyboard.h"
105 #include "blockinput.h"
106 #include "dispextern.h"
107 #include "composite.h"
109 #include "sysselect.h"
110 #include "syssignal.h"
116 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
117 #include "xgselect.h"
123 /* 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 int process_tick
;
186 /* Number of events for which the user or sentinel has been notified. */
187 static 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 #ifdef EMACS_HAS_USECS
232 #define ADAPTIVE_READ_BUFFERING
236 #ifdef ADAPTIVE_READ_BUFFERING
237 #define READ_OUTPUT_DELAY_INCREMENT 10000
238 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
239 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
241 /* Number of processes which have a non-zero read_output_delay,
242 and therefore might be delayed for adaptive read buffering. */
244 static int process_output_delay_count
;
246 /* Non-zero if any process has non-nil read_output_skip. */
248 static int process_output_skip
;
251 #define process_output_delay_count 0
254 static Lisp_Object
Fget_process (Lisp_Object
);
255 static void create_process (Lisp_Object
, char **, Lisp_Object
);
257 static int keyboard_bit_set (SELECT_TYPE
*);
259 static void deactivate_process (Lisp_Object
);
260 static void status_notify (struct Lisp_Process
*);
261 static int read_process_output (Lisp_Object
, int);
262 static void create_pty (Lisp_Object
);
264 /* If we support a window system, turn on the code to poll periodically
265 to detect C-g. It isn't actually used when doing interrupt input. */
266 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
267 #define POLL_FOR_INPUT
270 static Lisp_Object
get_process (register Lisp_Object name
);
271 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
273 /* Mask of bits indicating the descriptors that we wait for input on. */
275 static SELECT_TYPE input_wait_mask
;
277 /* Mask that excludes keyboard input descriptor(s). */
279 static SELECT_TYPE non_keyboard_wait_mask
;
281 /* Mask that excludes process input descriptor(s). */
283 static SELECT_TYPE non_process_wait_mask
;
285 /* Mask for selecting for write. */
287 static SELECT_TYPE write_mask
;
289 #ifdef NON_BLOCKING_CONNECT
290 /* Mask of bits indicating the descriptors that we wait for connect to
291 complete on. Once they complete, they are removed from this mask
292 and added to the input_wait_mask and non_keyboard_wait_mask. */
294 static SELECT_TYPE connect_wait_mask
;
296 /* Number of bits set in connect_wait_mask. */
297 static int num_pending_connects
;
298 #endif /* NON_BLOCKING_CONNECT */
300 /* The largest descriptor currently in use for a process object. */
301 static int max_process_desc
;
303 /* The largest descriptor currently in use for input. */
304 static int max_input_desc
;
306 /* Indexed by descriptor, gives the process (if any) for that descriptor */
307 static Lisp_Object chan_process
[MAXDESC
];
309 /* Alist of elements (NAME . PROCESS) */
310 static Lisp_Object Vprocess_alist
;
312 /* Buffered-ahead input char from process, indexed by channel.
313 -1 means empty (no char is buffered).
314 Used on sys V where the only way to tell if there is any
315 output from the process is to read at least one char.
316 Always -1 on systems that support FIONREAD. */
318 static int proc_buffered_char
[MAXDESC
];
320 /* Table of `struct coding-system' for each process. */
321 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
322 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
324 #ifdef DATAGRAM_SOCKETS
325 /* Table of `partner address' for datagram sockets. */
326 static struct sockaddr_and_len
{
329 } datagram_address
[MAXDESC
];
330 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
331 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
333 #define DATAGRAM_CHAN_P(chan) (0)
334 #define DATAGRAM_CONN_P(proc) (0)
337 /* Maximum number of bytes to send to a pty without an eof. */
338 static int pty_max_bytes
;
342 static struct fd_callback_data
348 int condition
; /* mask of the defines above. */
349 } fd_callback_info
[MAXDESC
];
352 /* Add a file descriptor FD to be monitored for when read is possible.
353 When read is possible, call FUNC with argument DATA. */
356 add_read_fd (int fd
, fd_callback func
, void *data
)
358 xassert (fd
< MAXDESC
);
359 add_keyboard_wait_descriptor (fd
);
361 fd_callback_info
[fd
].func
= func
;
362 fd_callback_info
[fd
].data
= data
;
363 fd_callback_info
[fd
].condition
|= FOR_READ
;
366 /* Stop monitoring file descriptor FD for when read is possible. */
369 delete_read_fd (int fd
)
371 xassert (fd
< MAXDESC
);
372 delete_keyboard_wait_descriptor (fd
);
374 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
375 if (fd_callback_info
[fd
].condition
== 0)
377 fd_callback_info
[fd
].func
= 0;
378 fd_callback_info
[fd
].data
= 0;
382 /* Add a file descriptor FD to be monitored for when write is possible.
383 When write is possible, call FUNC with argument DATA. */
386 add_write_fd (int fd
, fd_callback func
, void *data
)
388 xassert (fd
< MAXDESC
);
389 FD_SET (fd
, &write_mask
);
390 if (fd
> max_input_desc
)
393 fd_callback_info
[fd
].func
= func
;
394 fd_callback_info
[fd
].data
= data
;
395 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
398 /* Stop monitoring file descriptor FD for when write is possible. */
401 delete_write_fd (int fd
)
403 int lim
= max_input_desc
;
405 xassert (fd
< MAXDESC
);
406 FD_CLR (fd
, &write_mask
);
407 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
408 if (fd_callback_info
[fd
].condition
== 0)
410 fd_callback_info
[fd
].func
= 0;
411 fd_callback_info
[fd
].data
= 0;
413 if (fd
== max_input_desc
)
414 for (fd
= lim
; fd
>= 0; fd
--)
415 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
425 /* Compute the Lisp form of the process status, p->status, from
426 the numeric status that was returned by `wait'. */
428 static Lisp_Object
status_convert (int);
431 update_status (struct Lisp_Process
*p
)
433 eassert (p
->raw_status_new
);
434 p
->status
= status_convert (p
->raw_status
);
435 p
->raw_status_new
= 0;
438 /* Convert a process status word in Unix format to
439 the list that we use internally. */
442 status_convert (int w
)
445 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
446 else if (WIFEXITED (w
))
447 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
448 WCOREDUMP (w
) ? Qt
: Qnil
));
449 else if (WIFSIGNALED (w
))
450 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
451 WCOREDUMP (w
) ? Qt
: Qnil
));
456 /* Given a status-list, extract the three pieces of information
457 and store them individually through the three pointers. */
460 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
474 *code
= XFASTINT (XCAR (tem
));
476 *coredump
= !NILP (tem
);
480 /* Return a string describing a process status list. */
483 status_message (struct Lisp_Process
*p
)
485 Lisp_Object status
= p
->status
;
488 Lisp_Object string
, string2
;
490 decode_status (status
, &symbol
, &code
, &coredump
);
492 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
495 synchronize_system_messages_locale ();
496 signame
= strsignal (code
);
498 string
= build_string ("unknown");
503 string
= make_unibyte_string (signame
, strlen (signame
));
504 if (! NILP (Vlocale_coding_system
))
505 string
= (code_convert_string_norecord
506 (string
, Vlocale_coding_system
, 0));
507 c1
= STRING_CHAR (SDATA (string
));
510 Faset (string
, make_number (0), make_number (c2
));
512 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
513 return concat2 (string
, string2
);
515 else if (EQ (symbol
, Qexit
))
518 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
520 return build_string ("finished\n");
521 string
= Fnumber_to_string (make_number (code
));
522 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
523 return concat3 (build_string ("exited abnormally with code "),
526 else if (EQ (symbol
, Qfailed
))
528 string
= Fnumber_to_string (make_number (code
));
529 string2
= build_string ("\n");
530 return concat3 (build_string ("failed with code "),
534 return Fcopy_sequence (Fsymbol_name (symbol
));
539 /* The file name of the pty opened by allocate_pty. */
540 static char pty_name
[24];
542 /* Open an available pty, returning a file descriptor.
543 Return -1 on failure.
544 The file name of the terminal corresponding to the pty
545 is left in the variable pty_name. */
556 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
557 for (i
= 0; i
< 16; i
++)
560 #ifdef PTY_NAME_SPRINTF
563 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
564 #endif /* no PTY_NAME_SPRINTF */
568 #else /* no PTY_OPEN */
570 { /* Some systems name their pseudoterminals so that there are gaps in
571 the usual sequence - for example, on HP9000/S700 systems, there
572 are no pseudoterminals with names ending in 'f'. So we wait for
573 three failures in a row before deciding that we've reached the
575 int failed_count
= 0;
578 if (stat (pty_name
, &stb
) < 0)
581 if (failed_count
>= 3)
588 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
590 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
593 #endif /* no PTY_OPEN */
597 /* check to make certain that both sides are available
598 this avoids a nasty yet stupid bug in rlogins */
599 #ifdef PTY_TTY_NAME_SPRINTF
602 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
603 #endif /* no PTY_TTY_NAME_SPRINTF */
604 if (access (pty_name
, 6) != 0)
619 #endif /* HAVE_PTYS */
622 make_process (Lisp_Object name
)
624 register Lisp_Object val
, tem
, name1
;
625 register struct Lisp_Process
*p
;
626 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
629 p
= allocate_process ();
637 p
->raw_status_new
= 0;
639 p
->mark
= Fmake_marker ();
640 p
->kill_without_query
= 0;
642 #ifdef ADAPTIVE_READ_BUFFERING
643 p
->adaptive_read_buffering
= 0;
644 p
->read_output_delay
= 0;
645 p
->read_output_skip
= 0;
649 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
650 p
->gnutls_log_level
= 0;
652 p
->gnutls_state
= NULL
;
653 p
->gnutls_x509_cred
= NULL
;
654 p
->gnutls_anon_cred
= NULL
;
657 /* If name is already in use, modify it until it is unused. */
662 tem
= Fget_process (name1
);
663 if (NILP (tem
)) break;
664 sprintf (suffix
, "<%"pMd
">", i
);
665 name1
= concat2 (name
, build_string (suffix
));
669 XSETPROCESS (val
, p
);
670 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
675 remove_process (register Lisp_Object proc
)
677 register Lisp_Object pair
;
679 pair
= Frassq (proc
, Vprocess_alist
);
680 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
682 deactivate_process (proc
);
686 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
687 doc
: /* Return t if OBJECT is a process. */)
690 return PROCESSP (object
) ? Qt
: Qnil
;
693 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
694 doc
: /* Return the process named NAME, or nil if there is none. */)
695 (register Lisp_Object name
)
700 return Fcdr (Fassoc (name
, Vprocess_alist
));
703 /* This is how commands for the user decode process arguments. It
704 accepts a process, a process name, a buffer, a buffer name, or nil.
705 Buffers denote the first process in the buffer, and nil denotes the
709 get_process (register Lisp_Object name
)
711 register Lisp_Object proc
, obj
;
714 obj
= Fget_process (name
);
716 obj
= Fget_buffer (name
);
718 error ("Process %s does not exist", SDATA (name
));
720 else if (NILP (name
))
721 obj
= Fcurrent_buffer ();
725 /* Now obj should be either a buffer object or a process object.
729 proc
= Fget_buffer_process (obj
);
731 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
743 /* Fdelete_process promises to immediately forget about the process, but in
744 reality, Emacs needs to remember those processes until they have been
745 treated by sigchld_handler; otherwise this handler would consider the
746 process as being synchronous and say that the synchronous process is
748 static Lisp_Object deleted_pid_list
;
751 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
752 doc
: /* Delete PROCESS: kill it and forget about it immediately.
753 PROCESS may be a process, a buffer, the name of a process or buffer, or
754 nil, indicating the current buffer's process. */)
755 (register Lisp_Object process
)
757 register struct Lisp_Process
*p
;
759 process
= get_process (process
);
760 p
= XPROCESS (process
);
762 p
->raw_status_new
= 0;
763 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
765 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
766 p
->tick
= ++process_tick
;
768 redisplay_preserve_echo_area (13);
770 else if (p
->infd
>= 0)
774 /* Assignment to EMACS_INT stops GCC whining about limited range
776 EMACS_INT pid
= p
->pid
;
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
)
873 /* Assignment to EMACS_INT stops GCC whining about limited range of
877 CHECK_PROCESS (process
);
878 pid
= XPROCESS (process
)->pid
;
879 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
882 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
883 doc
: /* Return the name of PROCESS, as a string.
884 This is the name of the program invoked in PROCESS,
885 possibly modified to make it unique among process names. */)
886 (register Lisp_Object process
)
888 CHECK_PROCESS (process
);
889 return XPROCESS (process
)->name
;
892 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
893 doc
: /* Return the command that was executed to start PROCESS.
894 This is a list of strings, the first string being the program executed
895 and the rest of the strings being the arguments given to it.
896 For a network or serial process, this is nil (process is running) or t
897 \(process is stopped). */)
898 (register Lisp_Object process
)
900 CHECK_PROCESS (process
);
901 return XPROCESS (process
)->command
;
904 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
905 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
906 This is the terminal that the process itself reads and writes on,
907 not the name of the pty that Emacs uses to talk with that terminal. */)
908 (register Lisp_Object process
)
910 CHECK_PROCESS (process
);
911 return XPROCESS (process
)->tty_name
;
914 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
916 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
918 (register Lisp_Object process
, Lisp_Object buffer
)
920 struct Lisp_Process
*p
;
922 CHECK_PROCESS (process
);
924 CHECK_BUFFER (buffer
);
925 p
= XPROCESS (process
);
927 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
928 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
929 setup_process_coding_systems (process
);
933 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
935 doc
: /* Return the buffer PROCESS is associated with.
936 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
937 (register Lisp_Object process
)
939 CHECK_PROCESS (process
);
940 return XPROCESS (process
)->buffer
;
943 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
945 doc
: /* Return the marker for the end of the last output from PROCESS. */)
946 (register Lisp_Object process
)
948 CHECK_PROCESS (process
);
949 return XPROCESS (process
)->mark
;
952 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
954 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
955 A value of t means stop accepting output from the process.
957 When a process has a filter, its buffer is not used for output.
958 Instead, each time it does output, the entire string of output is
959 passed to the filter.
961 The filter gets two arguments: the process and the string of output.
962 The string argument is normally a multibyte string, except:
963 - if the process' input coding system is no-conversion or raw-text,
964 it is a unibyte string (the non-converted input), or else
965 - if `default-enable-multibyte-characters' is nil, it is a unibyte
966 string (the result of converting the decoded input multibyte
967 string to unibyte with `string-make-unibyte'). */)
968 (register Lisp_Object process
, Lisp_Object filter
)
970 struct Lisp_Process
*p
;
972 CHECK_PROCESS (process
);
973 p
= XPROCESS (process
);
975 /* Don't signal an error if the process' input file descriptor
976 is closed. This could make debugging Lisp more difficult,
977 for example when doing something like
979 (setq process (start-process ...))
981 (set-process-filter process ...) */
985 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
987 FD_CLR (p
->infd
, &input_wait_mask
);
988 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
990 else if (EQ (p
->filter
, Qt
)
991 /* Network or serial process not stopped: */
992 && !EQ (p
->command
, Qt
))
994 FD_SET (p
->infd
, &input_wait_mask
);
995 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1000 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1001 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1002 setup_process_coding_systems (process
);
1006 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1008 doc
: /* Returns the filter function of PROCESS; nil if none.
1009 See `set-process-filter' for more info on filter functions. */)
1010 (register Lisp_Object process
)
1012 CHECK_PROCESS (process
);
1013 return XPROCESS (process
)->filter
;
1016 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1018 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1019 The sentinel is called as a function when the process changes state.
1020 It gets two arguments: the process, and a string describing the change. */)
1021 (register Lisp_Object process
, Lisp_Object sentinel
)
1023 struct Lisp_Process
*p
;
1025 CHECK_PROCESS (process
);
1026 p
= XPROCESS (process
);
1028 p
->sentinel
= sentinel
;
1029 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1030 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1034 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1036 doc
: /* Return the sentinel of PROCESS; nil if none.
1037 See `set-process-sentinel' for more info on sentinels. */)
1038 (register Lisp_Object process
)
1040 CHECK_PROCESS (process
);
1041 return XPROCESS (process
)->sentinel
;
1044 DEFUN ("set-process-window-size", Fset_process_window_size
,
1045 Sset_process_window_size
, 3, 3, 0,
1046 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1047 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1049 CHECK_PROCESS (process
);
1050 CHECK_NATNUM (height
);
1051 CHECK_NATNUM (width
);
1053 if (XPROCESS (process
)->infd
< 0
1054 || set_window_size (XPROCESS (process
)->infd
,
1055 XINT (height
), XINT (width
)) <= 0)
1061 DEFUN ("set-process-inherit-coding-system-flag",
1062 Fset_process_inherit_coding_system_flag
,
1063 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1064 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1065 If the second argument FLAG is non-nil, then the variable
1066 `buffer-file-coding-system' of the buffer associated with PROCESS
1067 will be bound to the value of the coding system used to decode
1070 This is useful when the coding system specified for the process buffer
1071 leaves either the character code conversion or the end-of-line conversion
1072 unspecified, or if the coding system used to decode the process output
1073 is more appropriate for saving the process buffer.
1075 Binding the variable `inherit-process-coding-system' to non-nil before
1076 starting the process is an alternative way of setting the inherit flag
1077 for the process which will run. */)
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. */)
1091 (register Lisp_Object process
, Lisp_Object flag
)
1093 CHECK_PROCESS (process
);
1094 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1098 DEFUN ("process-query-on-exit-flag",
1099 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1101 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1102 (register Lisp_Object process
)
1104 CHECK_PROCESS (process
);
1105 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1108 #ifdef DATAGRAM_SOCKETS
1109 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1112 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1114 doc
: /* Return the contact info of PROCESS; t for a real child.
1115 For a network or serial connection, the value depends on the optional
1116 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1117 SERVICE) for a network connection or (PORT SPEED) for a serial
1118 connection. If KEY is t, the complete contact information for the
1119 connection is returned, else the specific value for the keyword KEY is
1120 returned. See `make-network-process' or `make-serial-process' for a
1121 list of keywords. */)
1122 (register Lisp_Object process
, Lisp_Object key
)
1124 Lisp_Object contact
;
1126 CHECK_PROCESS (process
);
1127 contact
= XPROCESS (process
)->childp
;
1129 #ifdef DATAGRAM_SOCKETS
1130 if (DATAGRAM_CONN_P (process
)
1131 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1132 contact
= Fplist_put (contact
, QCremote
,
1133 Fprocess_datagram_address (process
));
1136 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1138 if (NILP (key
) && NETCONN_P (process
))
1139 return Fcons (Fplist_get (contact
, QChost
),
1140 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1141 if (NILP (key
) && SERIALCONN_P (process
))
1142 return Fcons (Fplist_get (contact
, QCport
),
1143 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1144 return Fplist_get (contact
, key
);
1147 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1149 doc
: /* Return the plist of PROCESS. */)
1150 (register Lisp_Object process
)
1152 CHECK_PROCESS (process
);
1153 return XPROCESS (process
)->plist
;
1156 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1158 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1159 (register Lisp_Object process
, Lisp_Object plist
)
1161 CHECK_PROCESS (process
);
1164 XPROCESS (process
)->plist
= plist
;
1168 #if 0 /* Turned off because we don't currently record this info
1169 in the process. Perhaps add it. */
1170 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1171 doc
: /* Return the connection type of PROCESS.
1172 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1173 a socket connection. */)
1174 (Lisp_Object process
)
1176 return XPROCESS (process
)->type
;
1180 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1181 doc
: /* Return the connection type of PROCESS.
1182 The value is either the symbol `real', `network', or `serial'.
1183 PROCESS may be a process, a buffer, the name of a process or buffer, or
1184 nil, indicating the current buffer's process. */)
1185 (Lisp_Object process
)
1188 proc
= get_process (process
);
1189 return XPROCESS (proc
)->type
;
1192 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1194 doc
: /* Convert network ADDRESS from internal format to a string.
1195 A 4 or 5 element vector represents an IPv4 address (with port number).
1196 An 8 or 9 element vector represents an IPv6 address (with port number).
1197 If optional second argument OMIT-PORT is non-nil, don't include a port
1198 number in the string, even when present in ADDRESS.
1199 Returns nil if format of ADDRESS is invalid. */)
1200 (Lisp_Object address
, Lisp_Object omit_port
)
1205 if (STRINGP (address
)) /* AF_LOCAL */
1208 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1210 register struct Lisp_Vector
*p
= XVECTOR (address
);
1211 EMACS_INT size
= p
->header
.size
;
1212 Lisp_Object args
[10];
1215 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1217 args
[0] = build_string ("%d.%d.%d.%d");
1222 args
[0] = build_string ("%d.%d.%d.%d:%d");
1225 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1227 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1232 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1238 for (i
= 0; i
< nargs
; i
++)
1240 EMACS_INT element
= XINT (p
->contents
[i
]);
1242 if (element
< 0 || element
> 65535)
1245 if (nargs
<= 5 /* IPv4 */
1246 && i
< 4 /* host, not port */
1250 args
[i
+1] = p
->contents
[i
];
1253 return Fformat (nargs
+1, args
);
1256 if (CONSP (address
))
1258 Lisp_Object args
[2];
1259 args
[0] = build_string ("<Family %d>");
1260 args
[1] = Fcar (address
);
1261 return Fformat (2, args
);
1267 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1268 doc
: /* Return a list of all processes. */)
1271 return Fmapcar (Qcdr
, Vprocess_alist
);
1274 /* Starting asynchronous inferior processes. */
1276 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1278 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1279 doc
: /* Start a program in a subprocess. Return the process object for it.
1280 NAME is name for process. It is modified if necessary to make it unique.
1281 BUFFER is the buffer (or buffer name) to associate with the process.
1283 Process output (both standard output and standard error streams) goes
1284 at end of BUFFER, unless you specify an output stream or filter
1285 function to handle the output. BUFFER may also be nil, meaning that
1286 this process is not associated with any buffer.
1288 PROGRAM is the program file name. It is searched for in `exec-path'
1289 (which see). If nil, just associate a pty with the buffer. Remaining
1290 arguments are strings to give program as arguments.
1292 If you want to separate standard output from standard error, invoke
1293 the command through a shell and redirect one of them using the shell
1296 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1297 (ptrdiff_t nargs
, Lisp_Object
*args
)
1299 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1300 register unsigned char **new_argv
;
1302 int count
= SPECPDL_INDEX ();
1306 buffer
= Fget_buffer_create (buffer
);
1308 /* Make sure that the child will be able to chdir to the current
1309 buffer's current directory, or its unhandled equivalent. We
1310 can't just have the child check for an error when it does the
1311 chdir, since it's in a vfork.
1313 We have to GCPRO around this because Fexpand_file_name and
1314 Funhandled_file_name_directory might call a file name handling
1315 function. The argument list is protected by the caller, so all
1316 we really have to worry about is buffer. */
1318 struct gcpro gcpro1
, gcpro2
;
1320 current_dir
= BVAR (current_buffer
, directory
);
1322 GCPRO2 (buffer
, current_dir
);
1324 current_dir
= Funhandled_file_name_directory (current_dir
);
1325 if (NILP (current_dir
))
1326 /* If the file name handler says that current_dir is unreachable, use
1327 a sensible default. */
1328 current_dir
= build_string ("~/");
1329 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1330 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1331 report_file_error ("Setting current directory",
1332 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1338 CHECK_STRING (name
);
1342 if (!NILP (program
))
1343 CHECK_STRING (program
);
1345 proc
= make_process (name
);
1346 /* If an error occurs and we can't start the process, we want to
1347 remove it from the process list. This means that each error
1348 check in create_process doesn't need to call remove_process
1349 itself; it's all taken care of here. */
1350 record_unwind_protect (start_process_unwind
, proc
);
1352 XPROCESS (proc
)->childp
= Qt
;
1353 XPROCESS (proc
)->plist
= Qnil
;
1354 XPROCESS (proc
)->type
= Qreal
;
1355 XPROCESS (proc
)->buffer
= buffer
;
1356 XPROCESS (proc
)->sentinel
= Qnil
;
1357 XPROCESS (proc
)->filter
= Qnil
;
1358 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1361 /* AKA GNUTLS_INITSTAGE(proc). */
1362 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1363 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1366 #ifdef ADAPTIVE_READ_BUFFERING
1367 XPROCESS (proc
)->adaptive_read_buffering
1368 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1369 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1372 /* Make the process marker point into the process buffer (if any). */
1373 if (BUFFERP (buffer
))
1374 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1375 BUF_ZV (XBUFFER (buffer
)),
1376 BUF_ZV_BYTE (XBUFFER (buffer
)));
1379 /* Decide coding systems for communicating with the process. Here
1380 we don't setup the structure coding_system nor pay attention to
1381 unibyte mode. They are done in create_process. */
1383 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1384 Lisp_Object coding_systems
= Qt
;
1385 Lisp_Object val
, *args2
;
1386 struct gcpro gcpro1
, gcpro2
;
1388 val
= Vcoding_system_for_read
;
1391 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1392 args2
[0] = Qstart_process
;
1393 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1394 GCPRO2 (proc
, current_dir
);
1395 if (!NILP (program
))
1396 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1398 if (CONSP (coding_systems
))
1399 val
= XCAR (coding_systems
);
1400 else if (CONSP (Vdefault_process_coding_system
))
1401 val
= XCAR (Vdefault_process_coding_system
);
1403 XPROCESS (proc
)->decode_coding_system
= val
;
1405 val
= Vcoding_system_for_write
;
1408 if (EQ (coding_systems
, Qt
))
1410 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1411 args2
[0] = Qstart_process
;
1412 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1413 GCPRO2 (proc
, current_dir
);
1414 if (!NILP (program
))
1415 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1418 if (CONSP (coding_systems
))
1419 val
= XCDR (coding_systems
);
1420 else if (CONSP (Vdefault_process_coding_system
))
1421 val
= XCDR (Vdefault_process_coding_system
);
1423 XPROCESS (proc
)->encode_coding_system
= val
;
1424 /* Note: At this moment, the above coding system may leave
1425 text-conversion or eol-conversion unspecified. They will be
1426 decided after we read output from the process and decode it by
1427 some coding system, or just before we actually send a text to
1432 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1433 XPROCESS (proc
)->decoding_carryover
= 0;
1434 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1436 XPROCESS (proc
)->inherit_coding_system_flag
1437 = !(NILP (buffer
) || !inherit_process_coding_system
);
1439 if (!NILP (program
))
1441 /* If program file name is not absolute, search our path for it.
1442 Put the name we will really use in TEM. */
1443 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1444 && !(SCHARS (program
) > 1
1445 && IS_DEVICE_SEP (SREF (program
, 1))))
1447 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1450 GCPRO4 (name
, program
, buffer
, current_dir
);
1451 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1454 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1455 tem
= Fexpand_file_name (tem
, Qnil
);
1459 if (!NILP (Ffile_directory_p (program
)))
1460 error ("Specified program for new process is a directory");
1464 /* If program file name starts with /: for quoting a magic name,
1466 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1467 && SREF (tem
, 1) == ':')
1468 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1471 Lisp_Object arg_encoding
= Qnil
;
1472 struct gcpro gcpro1
;
1475 /* Encode the file name and put it in NEW_ARGV.
1476 That's where the child will use it to execute the program. */
1477 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1479 /* Here we encode arguments by the coding system used for sending
1480 data to the process. We don't support using different coding
1481 systems for encoding arguments and for encoding data sent to the
1484 for (i
= 3; i
< nargs
; i
++)
1486 tem
= Fcons (args
[i
], tem
);
1487 CHECK_STRING (XCAR (tem
));
1488 if (STRING_MULTIBYTE (XCAR (tem
)))
1490 if (NILP (arg_encoding
))
1491 arg_encoding
= (complement_process_encoding_system
1492 (XPROCESS (proc
)->encode_coding_system
));
1494 code_convert_string_norecord
1495 (XCAR (tem
), arg_encoding
, 1));
1502 /* Now that everything is encoded we can collect the strings into
1504 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1505 new_argv
[nargs
- 2] = 0;
1507 for (i
= nargs
- 2; i
-- != 0; )
1509 new_argv
[i
] = SDATA (XCAR (tem
));
1513 create_process (proc
, (char **) new_argv
, current_dir
);
1518 return unbind_to (count
, proc
);
1521 /* This function is the unwind_protect form for Fstart_process. If
1522 PROC doesn't have its pid set, then we know someone has signaled
1523 an error and the process wasn't started successfully, so we should
1524 remove it from the process list. */
1526 start_process_unwind (Lisp_Object proc
)
1528 if (!PROCESSP (proc
))
1531 /* Was PROC started successfully?
1532 -2 is used for a pty with no process, eg for gdb. */
1533 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1534 remove_process (proc
);
1540 create_process_1 (struct atimer
*timer
)
1542 /* Nothing to do. */
1547 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1549 int inchannel
, outchannel
;
1552 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1553 int wait_child_setup
[2];
1557 struct sigaction sigint_action
;
1558 struct sigaction sigquit_action
;
1559 struct sigaction sigpipe_action
;
1561 struct sigaction sighup_action
;
1563 /* Use volatile to protect variables from being clobbered by longjmp. */
1564 volatile int forkin
, forkout
;
1565 volatile int pty_flag
= 0;
1567 extern char **environ
;
1570 inchannel
= outchannel
= -1;
1573 if (!NILP (Vprocess_connection_type
))
1574 outchannel
= inchannel
= allocate_pty ();
1578 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1579 /* On most USG systems it does not work to open the pty's tty here,
1580 then close it and reopen it in the child. */
1582 /* Don't let this terminal become our controlling terminal
1583 (in case we don't have one). */
1584 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1586 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1589 report_file_error ("Opening pty", Qnil
);
1591 forkin
= forkout
= -1;
1592 #endif /* not USG, or USG_SUBTTY_WORKS */
1596 #endif /* HAVE_PTYS */
1601 report_file_error ("Creating pipe", Qnil
);
1607 emacs_close (inchannel
);
1608 emacs_close (forkout
);
1609 report_file_error ("Creating pipe", Qnil
);
1615 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1619 tem
= pipe (wait_child_setup
);
1621 report_file_error ("Creating pipe", Qnil
);
1622 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1624 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1627 emacs_close (wait_child_setup
[0]);
1628 emacs_close (wait_child_setup
[1]);
1629 report_file_error ("Setting file descriptor flags", Qnil
);
1635 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1636 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1639 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1640 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1644 /* Record this as an active process, with its channels.
1645 As a result, child_setup will close Emacs's side of the pipes. */
1646 chan_process
[inchannel
] = process
;
1647 XPROCESS (process
)->infd
= inchannel
;
1648 XPROCESS (process
)->outfd
= outchannel
;
1650 /* Previously we recorded the tty descriptor used in the subprocess.
1651 It was only used for getting the foreground tty process, so now
1652 we just reopen the device (see emacs_get_tty_pgrp) as this is
1653 more portable (see USG_SUBTTY_WORKS above). */
1655 XPROCESS (process
)->pty_flag
= pty_flag
;
1656 XPROCESS (process
)->status
= Qrun
;
1658 /* Delay interrupts until we have a chance to store
1659 the new fork's pid in its process structure */
1660 sigemptyset (&blocked
);
1662 sigaddset (&blocked
, SIGCHLD
);
1664 #ifdef HAVE_WORKING_VFORK
1665 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1666 this sets the parent's signal handlers as well as the child's.
1667 So delay all interrupts whose handlers the child might munge,
1668 and record the current handlers so they can be restored later. */
1669 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1670 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1671 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1673 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1675 #endif /* HAVE_WORKING_VFORK */
1676 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1678 FD_SET (inchannel
, &input_wait_mask
);
1679 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1680 if (inchannel
> max_process_desc
)
1681 max_process_desc
= inchannel
;
1683 /* Until we store the proper pid, enable sigchld_handler
1684 to recognize an unknown pid as standing for this process.
1685 It is very important not to let this `marker' value stay
1686 in the table after this function has returned; if it does
1687 it might cause call-process to hang and subsequent asynchronous
1688 processes to get their return values scrambled. */
1689 XPROCESS (process
)->pid
= -1;
1691 /* This must be called after the above line because it may signal an
1693 setup_process_coding_systems (process
);
1698 /* child_setup must clobber environ on systems with true vfork.
1699 Protect it from permanent change. */
1700 char **save_environ
= environ
;
1701 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1706 #endif /* not WINDOWSNT */
1708 int xforkin
= forkin
;
1709 int xforkout
= forkout
;
1711 #if 0 /* This was probably a mistake--it duplicates code later on,
1712 but fails to handle all the cases. */
1713 /* Make sure SIGCHLD is not blocked in the child. */
1714 sigsetmask (SIGEMPTYMASK
);
1717 /* Make the pty be the controlling terminal of the process. */
1719 /* First, disconnect its current controlling terminal. */
1721 /* We tried doing setsid only if pty_flag, but it caused
1722 process_set_signal to fail on SGI when using a pipe. */
1724 /* Make the pty's terminal the controlling terminal. */
1725 if (pty_flag
&& xforkin
>= 0)
1728 /* We ignore the return value
1729 because faith@cs.unc.edu says that is necessary on Linux. */
1730 ioctl (xforkin
, TIOCSCTTY
, 0);
1733 #else /* not HAVE_SETSID */
1735 /* It's very important to call setpgrp here and no time
1736 afterwards. Otherwise, we lose our controlling tty which
1737 is set when we open the pty. */
1740 #endif /* not HAVE_SETSID */
1741 #if defined (LDISC1)
1742 if (pty_flag
&& xforkin
>= 0)
1745 tcgetattr (xforkin
, &t
);
1747 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1748 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1751 #if defined (NTTYDISC) && defined (TIOCSETD)
1752 if (pty_flag
&& xforkin
>= 0)
1754 /* Use new line discipline. */
1755 int ldisc
= NTTYDISC
;
1756 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1761 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1762 can do TIOCSPGRP only to the process's controlling tty. */
1765 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1766 I can't test it since I don't have 4.3. */
1767 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1770 ioctl (j
, TIOCNOTTY
, 0);
1774 /* In order to get a controlling terminal on some versions
1775 of BSD, it is necessary to put the process in pgrp 0
1776 before it opens the terminal. */
1784 #endif /* TIOCNOTTY */
1786 #if !defined (DONT_REOPEN_PTY)
1787 /*** There is a suggestion that this ought to be a
1788 conditional on TIOCSPGRP,
1789 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1790 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1791 that system does seem to need this code, even though
1792 both HAVE_SETSID and TIOCSCTTY are defined. */
1793 /* Now close the pty (if we had it open) and reopen it.
1794 This makes the pty the controlling terminal of the subprocess. */
1798 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1801 emacs_close (xforkin
);
1802 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1806 emacs_write (1, "Couldn't open the pty terminal ", 31);
1807 emacs_write (1, pty_name
, strlen (pty_name
));
1808 emacs_write (1, "\n", 1);
1813 #endif /* not DONT_REOPEN_PTY */
1815 #ifdef SETUP_SLAVE_PTY
1820 #endif /* SETUP_SLAVE_PTY */
1822 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1823 Now reenable it in the child, so it will die when we want it to. */
1825 signal (SIGHUP
, SIG_DFL
);
1827 #endif /* HAVE_PTYS */
1829 signal (SIGINT
, SIG_DFL
);
1830 signal (SIGQUIT
, SIG_DFL
);
1831 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1833 signal (SIGPIPE
, SIG_DFL
);
1835 /* Stop blocking signals in the child. */
1836 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1839 child_setup_tty (xforkout
);
1841 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1842 new_argv
, 1, encoded_current_dir
);
1843 #else /* not WINDOWSNT */
1845 emacs_close (wait_child_setup
[0]);
1847 child_setup (xforkin
, xforkout
, xforkout
,
1848 new_argv
, 1, encoded_current_dir
);
1849 #endif /* not WINDOWSNT */
1851 environ
= save_environ
;
1856 /* This runs in the Emacs process. */
1860 emacs_close (forkin
);
1861 if (forkin
!= forkout
&& forkout
>= 0)
1862 emacs_close (forkout
);
1866 /* vfork succeeded. */
1867 XPROCESS (process
)->pid
= pid
;
1870 register_child (pid
, inchannel
);
1871 #endif /* WINDOWSNT */
1873 /* If the subfork execv fails, and it exits,
1874 this close hangs. I don't know why.
1875 So have an interrupt jar it loose. */
1877 struct atimer
*timer
;
1881 EMACS_SET_SECS_USECS (offset
, 1, 0);
1882 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1885 emacs_close (forkin
);
1887 cancel_atimer (timer
);
1891 if (forkin
!= forkout
&& forkout
>= 0)
1892 emacs_close (forkout
);
1896 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1899 XPROCESS (process
)->tty_name
= Qnil
;
1901 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1902 /* Wait for child_setup to complete in case that vfork is
1903 actually defined as fork. The descriptor wait_child_setup[1]
1904 of a pipe is closed at the child side either by close-on-exec
1905 on successful execvp or the _exit call in child_setup. */
1909 emacs_close (wait_child_setup
[1]);
1910 emacs_read (wait_child_setup
[0], &dummy
, 1);
1911 emacs_close (wait_child_setup
[0]);
1916 /* Restore the signal state whether vfork succeeded or not.
1917 (We will signal an error, below, if it failed.) */
1918 #ifdef HAVE_WORKING_VFORK
1919 /* Restore the parent's signal handlers. */
1920 sigaction (SIGINT
, &sigint_action
, 0);
1921 sigaction (SIGQUIT
, &sigquit_action
, 0);
1922 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1924 sigaction (SIGHUP
, &sighup_action
, 0);
1926 #endif /* HAVE_WORKING_VFORK */
1927 /* Stop blocking signals in the parent. */
1928 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1930 /* Now generate the error if vfork failed. */
1932 report_file_error ("Doing vfork", Qnil
);
1936 create_pty (Lisp_Object process
)
1938 int inchannel
, outchannel
;
1941 inchannel
= outchannel
= -1;
1944 if (!NILP (Vprocess_connection_type
))
1945 outchannel
= inchannel
= allocate_pty ();
1949 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1950 /* On most USG systems it does not work to open the pty's tty here,
1951 then close it and reopen it in the child. */
1953 /* Don't let this terminal become our controlling terminal
1954 (in case we don't have one). */
1955 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1957 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1960 report_file_error ("Opening pty", Qnil
);
1961 #if defined (DONT_REOPEN_PTY)
1962 /* In the case that vfork is defined as fork, the parent process
1963 (Emacs) may send some data before the child process completes
1964 tty options setup. So we setup tty before forking. */
1965 child_setup_tty (forkout
);
1966 #endif /* DONT_REOPEN_PTY */
1967 #endif /* not USG, or USG_SUBTTY_WORKS */
1970 #endif /* HAVE_PTYS */
1973 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1974 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1977 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1978 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1982 /* Record this as an active process, with its channels.
1983 As a result, child_setup will close Emacs's side of the pipes. */
1984 chan_process
[inchannel
] = process
;
1985 XPROCESS (process
)->infd
= inchannel
;
1986 XPROCESS (process
)->outfd
= outchannel
;
1988 /* Previously we recorded the tty descriptor used in the subprocess.
1989 It was only used for getting the foreground tty process, so now
1990 we just reopen the device (see emacs_get_tty_pgrp) as this is
1991 more portable (see USG_SUBTTY_WORKS above). */
1993 XPROCESS (process
)->pty_flag
= pty_flag
;
1994 XPROCESS (process
)->status
= Qrun
;
1995 setup_process_coding_systems (process
);
1997 FD_SET (inchannel
, &input_wait_mask
);
1998 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1999 if (inchannel
> max_process_desc
)
2000 max_process_desc
= inchannel
;
2002 XPROCESS (process
)->pid
= -2;
2005 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2008 XPROCESS (process
)->tty_name
= Qnil
;
2012 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2013 The address family of sa is not included in the result. */
2016 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2018 Lisp_Object address
;
2021 register struct Lisp_Vector
*p
;
2023 /* Workaround for a bug in getsockname on BSD: Names bound to
2024 sockets in the UNIX domain are inaccessible; getsockname returns
2025 a zero length name. */
2026 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2027 return empty_unibyte_string
;
2029 switch (sa
->sa_family
)
2033 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2034 len
= sizeof (sin
->sin_addr
) + 1;
2035 address
= Fmake_vector (make_number (len
), Qnil
);
2036 p
= XVECTOR (address
);
2037 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2038 cp
= (unsigned char *) &sin
->sin_addr
;
2044 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2045 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2046 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2047 address
= Fmake_vector (make_number (len
), Qnil
);
2048 p
= XVECTOR (address
);
2049 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2050 for (i
= 0; i
< len
; i
++)
2051 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2055 #ifdef HAVE_LOCAL_SOCKETS
2058 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2059 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2060 if (sockun
->sun_path
[i
] == 0)
2062 return make_unibyte_string (sockun
->sun_path
, i
);
2066 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2067 address
= Fcons (make_number (sa
->sa_family
),
2068 Fmake_vector (make_number (len
), Qnil
));
2069 p
= XVECTOR (XCDR (address
));
2070 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2076 p
->contents
[i
++] = make_number (*cp
++);
2082 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2085 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2087 register struct Lisp_Vector
*p
;
2089 if (VECTORP (address
))
2091 p
= XVECTOR (address
);
2092 if (p
->header
.size
== 5)
2095 return sizeof (struct sockaddr_in
);
2098 else if (p
->header
.size
== 9)
2100 *familyp
= AF_INET6
;
2101 return sizeof (struct sockaddr_in6
);
2105 #ifdef HAVE_LOCAL_SOCKETS
2106 else if (STRINGP (address
))
2108 *familyp
= AF_LOCAL
;
2109 return sizeof (struct sockaddr_un
);
2112 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && 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
;
2136 memset (sa
, 0, len
);
2138 if (VECTORP (address
))
2140 p
= XVECTOR (address
);
2141 if (family
== AF_INET
)
2143 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2144 len
= sizeof (sin
->sin_addr
) + 1;
2145 i
= XINT (p
->contents
[--len
]);
2146 sin
->sin_port
= htons (i
);
2147 cp
= (unsigned char *)&sin
->sin_addr
;
2148 sa
->sa_family
= family
;
2151 else if (family
== AF_INET6
)
2153 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2154 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2155 len
= sizeof (sin6
->sin6_addr
) + 1;
2156 i
= XINT (p
->contents
[--len
]);
2157 sin6
->sin6_port
= htons (i
);
2158 for (i
= 0; i
< len
; i
++)
2159 if (INTEGERP (p
->contents
[i
]))
2161 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2164 sa
->sa_family
= family
;
2171 else if (STRINGP (address
))
2173 #ifdef HAVE_LOCAL_SOCKETS
2174 if (family
== AF_LOCAL
)
2176 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2177 cp
= SDATA (address
);
2178 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2179 sockun
->sun_path
[i
] = *cp
++;
2180 sa
->sa_family
= family
;
2187 p
= XVECTOR (XCDR (address
));
2188 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2191 for (i
= 0; i
< len
; i
++)
2192 if (INTEGERP (p
->contents
[i
]))
2193 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2196 #ifdef DATAGRAM_SOCKETS
2197 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2199 doc
: /* Get the current datagram address associated with PROCESS. */)
2200 (Lisp_Object process
)
2204 CHECK_PROCESS (process
);
2206 if (!DATAGRAM_CONN_P (process
))
2209 channel
= XPROCESS (process
)->infd
;
2210 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2211 datagram_address
[channel
].len
);
2214 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2216 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2217 Returns nil upon error setting address, ADDRESS otherwise. */)
2218 (Lisp_Object process
, Lisp_Object address
)
2223 CHECK_PROCESS (process
);
2225 if (!DATAGRAM_CONN_P (process
))
2228 channel
= XPROCESS (process
)->infd
;
2230 len
= get_lisp_to_sockaddr_size (address
, &family
);
2231 if (datagram_address
[channel
].len
!= len
)
2233 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2239 static const struct socket_options
{
2240 /* The name of this option. Should be lowercase version of option
2241 name without SO_ prefix. */
2243 /* Option level SOL_... */
2245 /* Option number SO_... */
2247 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2248 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2249 } socket_options
[] =
2251 #ifdef SO_BINDTODEVICE
2252 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2255 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2258 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2261 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2264 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2267 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2270 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2273 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2275 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2278 /* Set option OPT to value VAL on socket S.
2280 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2281 Signals an error if setting a known option fails.
2285 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2288 const struct socket_options
*sopt
;
2293 name
= SSDATA (SYMBOL_NAME (opt
));
2294 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2295 if (strcmp (name
, sopt
->name
) == 0)
2298 switch (sopt
->opttype
)
2303 optval
= NILP (val
) ? 0 : 1;
2304 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2305 &optval
, sizeof (optval
));
2313 optval
= XINT (val
);
2315 error ("Bad option value for %s", name
);
2316 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2317 &optval
, sizeof (optval
));
2321 #ifdef SO_BINDTODEVICE
2324 char devname
[IFNAMSIZ
+1];
2326 /* This is broken, at least in the Linux 2.4 kernel.
2327 To unbind, the arg must be a zero integer, not the empty string.
2328 This should work on all systems. KFS. 2003-09-23. */
2329 memset (devname
, 0, sizeof devname
);
2332 char *arg
= SSDATA (val
);
2333 int len
= min (strlen (arg
), IFNAMSIZ
);
2334 memcpy (devname
, arg
, len
);
2336 else if (!NILP (val
))
2337 error ("Bad option value for %s", name
);
2338 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2347 struct linger linger
;
2350 linger
.l_linger
= 0;
2352 linger
.l_linger
= XINT (val
);
2354 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2355 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2356 &linger
, sizeof (linger
));
2366 report_file_error ("Cannot set network option",
2367 Fcons (opt
, Fcons (val
, Qnil
)));
2368 return (1 << sopt
->optbit
);
2372 DEFUN ("set-network-process-option",
2373 Fset_network_process_option
, Sset_network_process_option
,
2375 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2376 See `make-network-process' for a list of options and values.
2377 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2378 OPTION is not a supported option, return nil instead; otherwise return t. */)
2379 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2382 struct Lisp_Process
*p
;
2384 CHECK_PROCESS (process
);
2385 p
= XPROCESS (process
);
2386 if (!NETCONN1_P (p
))
2387 error ("Process is not a network process");
2391 error ("Process is not running");
2393 if (set_socket_option (s
, option
, value
))
2395 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2399 if (NILP (no_error
))
2400 error ("Unknown or unsupported option");
2406 DEFUN ("serial-process-configure",
2407 Fserial_process_configure
,
2408 Sserial_process_configure
,
2410 doc
: /* Configure speed, bytesize, etc. of a serial process.
2412 Arguments are specified as keyword/argument pairs. Attributes that
2413 are not given are re-initialized from the process's current
2414 configuration (available via the function `process-contact') or set to
2415 reasonable default values. The following arguments are defined:
2421 -- Any of these arguments can be given to identify the process that is
2422 to be configured. If none of these arguments is given, the current
2423 buffer's process is used.
2425 :speed SPEED -- SPEED is the speed of the serial port in bits per
2426 second, also called baud rate. Any value can be given for SPEED, but
2427 most serial ports work only at a few defined values between 1200 and
2428 115200, with 9600 being the most common value. If SPEED is nil, the
2429 serial port is not configured any further, i.e., all other arguments
2430 are ignored. This may be useful for special serial ports such as
2431 Bluetooth-to-serial converters which can only be configured through AT
2432 commands. A value of nil for SPEED can be used only when passed
2433 through `make-serial-process' or `serial-term'.
2435 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2436 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2438 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2439 `odd' (use odd parity), or the symbol `even' (use even parity). If
2440 PARITY is not given, no parity is used.
2442 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2443 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2444 is not given or nil, 1 stopbit is used.
2446 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2447 flowcontrol to be used, which is either nil (don't use flowcontrol),
2448 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2449 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2450 flowcontrol is used.
2452 `serial-process-configure' is called by `make-serial-process' for the
2453 initial configuration of the serial port.
2457 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2459 \(serial-process-configure
2460 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2462 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2464 usage: (serial-process-configure &rest ARGS) */)
2465 (ptrdiff_t nargs
, Lisp_Object
*args
)
2467 struct Lisp_Process
*p
;
2468 Lisp_Object contact
= Qnil
;
2469 Lisp_Object proc
= Qnil
;
2470 struct gcpro gcpro1
;
2472 contact
= Flist (nargs
, args
);
2475 proc
= Fplist_get (contact
, QCprocess
);
2477 proc
= Fplist_get (contact
, QCname
);
2479 proc
= Fplist_get (contact
, QCbuffer
);
2481 proc
= Fplist_get (contact
, QCport
);
2482 proc
= get_process (proc
);
2483 p
= XPROCESS (proc
);
2484 if (!EQ (p
->type
, Qserial
))
2485 error ("Not a serial process");
2487 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2493 serial_configure (p
, contact
);
2499 /* Used by make-serial-process to recover from errors. */
2501 make_serial_process_unwind (Lisp_Object proc
)
2503 if (!PROCESSP (proc
))
2505 remove_process (proc
);
2509 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2511 doc
: /* Create and return a serial port process.
2513 In Emacs, serial port connections are represented by process objects,
2514 so input and output work as for subprocesses, and `delete-process'
2515 closes a serial port connection. However, a serial process has no
2516 process id, it cannot be signaled, and the status codes are different
2517 from normal processes.
2519 `make-serial-process' creates a process and a buffer, on which you
2520 probably want to use `process-send-string'. Try \\[serial-term] for
2521 an interactive terminal. See below for examples.
2523 Arguments are specified as keyword/argument pairs. The following
2524 arguments are defined:
2526 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2527 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2528 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2529 the backslashes in strings).
2531 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2532 which is called by `make-serial-process'.
2534 :name NAME -- NAME is the name of the process. If NAME is not given,
2535 the value of PORT is used.
2537 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2538 with the process. Process output goes at the end of that buffer,
2539 unless you specify an output stream or filter function to handle the
2540 output. If BUFFER is not given, the value of NAME is used.
2542 :coding CODING -- If CODING is a symbol, it specifies the coding
2543 system used for both reading and writing for this process. If CODING
2544 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2545 ENCODING is used for writing.
2547 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2548 the process is running. If BOOL is not given, query before exiting.
2550 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2551 In the stopped state, a serial process does not accept incoming data,
2552 but you can send outgoing data. The stopped state is cleared by
2553 `continue-process' and set by `stop-process'.
2555 :filter FILTER -- Install FILTER as the process filter.
2557 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2559 :plist PLIST -- Install PLIST as the initial plist of the process.
2566 -- These arguments are handled by `serial-process-configure', which is
2567 called by `make-serial-process'.
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 int 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 `default-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 int 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");
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 (INTEGERP (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 select(). */
3300 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3307 report_file_error ("select failed", Qnil
);
3311 len
= sizeof xerrno
;
3312 eassert (FD_ISSET (s
, &fdset
));
3313 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3314 report_file_error ("getsockopt failed", Qnil
);
3316 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3320 #endif /* !WINDOWSNT */
3324 /* Discard the unwind protect closing S. */
3325 specpdl_ptr
= specpdl
+ count1
;
3330 if (xerrno
== EINTR
)
3337 #ifdef DATAGRAM_SOCKETS
3338 if (socktype
== SOCK_DGRAM
)
3340 if (datagram_address
[s
].sa
)
3342 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3343 datagram_address
[s
].len
= lres
->ai_addrlen
;
3347 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3348 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3351 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3352 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3353 conv_lisp_to_sockaddr (rfamily
, remote
,
3354 datagram_address
[s
].sa
, rlen
);
3358 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3361 contact
= Fplist_put (contact
, QCaddress
,
3362 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3363 #ifdef HAVE_GETSOCKNAME
3366 struct sockaddr_in sa1
;
3367 socklen_t len1
= sizeof (sa1
);
3368 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3369 contact
= Fplist_put (contact
, QClocal
,
3370 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3377 #ifdef HAVE_GETADDRINFO
3386 /* Discard the unwind protect for closing S, if any. */
3387 specpdl_ptr
= specpdl
+ count1
;
3389 /* Unwind bind_polling_period and request_sigio. */
3390 unbind_to (count
, Qnil
);
3394 /* If non-blocking got this far - and failed - assume non-blocking is
3395 not supported after all. This is probably a wrong assumption, but
3396 the normal blocking calls to open-network-stream handles this error
3398 if (is_non_blocking_client
)
3403 report_file_error ("make server process failed", contact
);
3405 report_file_error ("make client process failed", contact
);
3412 buffer
= Fget_buffer_create (buffer
);
3413 proc
= make_process (name
);
3415 chan_process
[inch
] = proc
;
3418 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3421 fcntl (inch
, F_SETFL
, O_NDELAY
);
3425 p
= XPROCESS (proc
);
3427 p
->childp
= contact
;
3428 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3432 p
->sentinel
= sentinel
;
3434 p
->log
= Fplist_get (contact
, QClog
);
3435 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3436 p
->kill_without_query
= 1;
3437 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3442 if (is_server
&& socktype
!= SOCK_DGRAM
)
3443 p
->status
= Qlisten
;
3445 /* Make the process marker point into the process buffer (if any). */
3446 if (BUFFERP (buffer
))
3447 set_marker_both (p
->mark
, buffer
,
3448 BUF_ZV (XBUFFER (buffer
)),
3449 BUF_ZV_BYTE (XBUFFER (buffer
)));
3451 #ifdef NON_BLOCKING_CONNECT
3452 if (is_non_blocking_client
)
3454 /* We may get here if connect did succeed immediately. However,
3455 in that case, we still need to signal this like a non-blocking
3457 p
->status
= Qconnect
;
3458 if (!FD_ISSET (inch
, &connect_wait_mask
))
3460 FD_SET (inch
, &connect_wait_mask
);
3461 FD_SET (inch
, &write_mask
);
3462 num_pending_connects
++;
3467 /* A server may have a client filter setting of Qt, but it must
3468 still listen for incoming connects unless it is stopped. */
3469 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3470 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3472 FD_SET (inch
, &input_wait_mask
);
3473 FD_SET (inch
, &non_keyboard_wait_mask
);
3476 if (inch
> max_process_desc
)
3477 max_process_desc
= inch
;
3479 tem
= Fplist_member (contact
, QCcoding
);
3480 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3481 tem
= Qnil
; /* No error message (too late!). */
3484 /* Setup coding systems for communicating with the network stream. */
3485 struct gcpro gcpro1
;
3486 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3487 Lisp_Object coding_systems
= Qt
;
3488 Lisp_Object fargs
[5], val
;
3492 val
= XCAR (XCDR (tem
));
3496 else if (!NILP (Vcoding_system_for_read
))
3497 val
= Vcoding_system_for_read
;
3498 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3499 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3500 /* We dare not decode end-of-line format by setting VAL to
3501 Qraw_text, because the existing Emacs Lisp libraries
3502 assume that they receive bare code including a sequence of
3507 if (NILP (host
) || NILP (service
))
3508 coding_systems
= Qnil
;
3511 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3512 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3514 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3517 if (CONSP (coding_systems
))
3518 val
= XCAR (coding_systems
);
3519 else if (CONSP (Vdefault_process_coding_system
))
3520 val
= XCAR (Vdefault_process_coding_system
);
3524 p
->decode_coding_system
= val
;
3528 val
= XCAR (XCDR (tem
));
3532 else if (!NILP (Vcoding_system_for_write
))
3533 val
= Vcoding_system_for_write
;
3534 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3538 if (EQ (coding_systems
, Qt
))
3540 if (NILP (host
) || NILP (service
))
3541 coding_systems
= Qnil
;
3544 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3545 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3547 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3551 if (CONSP (coding_systems
))
3552 val
= XCDR (coding_systems
);
3553 else if (CONSP (Vdefault_process_coding_system
))
3554 val
= XCDR (Vdefault_process_coding_system
);
3558 p
->encode_coding_system
= val
;
3560 setup_process_coding_systems (proc
);
3562 p
->decoding_buf
= empty_unibyte_string
;
3563 p
->decoding_carryover
= 0;
3564 p
->encoding_buf
= empty_unibyte_string
;
3566 p
->inherit_coding_system_flag
3567 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3574 #if defined (HAVE_NET_IF_H)
3577 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3578 doc
: /* Return an alist of all network interfaces and their network address.
3579 Each element is a cons, the car of which is a string containing the
3580 interface name, and the cdr is the network address in internal
3581 format; see the description of ADDRESS in `make-network-process'. */)
3584 struct ifconf ifconf
;
3585 struct ifreq
*ifreq
;
3587 ptrdiff_t buf_size
= 512;
3591 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3597 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3598 ifconf
.ifc_buf
= buf
;
3599 ifconf
.ifc_len
= buf_size
;
3600 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3607 while (ifconf
.ifc_len
== buf_size
);
3612 ifreq
= ifconf
.ifc_req
;
3613 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3615 struct ifreq
*ifq
= ifreq
;
3616 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3617 #define SIZEOF_IFREQ(sif) \
3618 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3619 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3621 int len
= SIZEOF_IFREQ (ifq
);
3623 int len
= sizeof (*ifreq
);
3625 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3627 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3629 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3632 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3633 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3634 res
= Fcons (Fcons (build_string (namebuf
),
3635 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3636 sizeof (struct sockaddr
))),
3643 #endif /* SIOCGIFCONF */
3645 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3649 const char *flag_sym
;
3652 static const struct ifflag_def ifflag_table
[] = {
3656 #ifdef IFF_BROADCAST
3657 { IFF_BROADCAST
, "broadcast" },
3660 { IFF_DEBUG
, "debug" },
3663 { IFF_LOOPBACK
, "loopback" },
3665 #ifdef IFF_POINTOPOINT
3666 { IFF_POINTOPOINT
, "pointopoint" },
3669 { IFF_RUNNING
, "running" },
3672 { IFF_NOARP
, "noarp" },
3675 { IFF_PROMISC
, "promisc" },
3677 #ifdef IFF_NOTRAILERS
3678 #ifdef NS_IMPL_COCOA
3679 /* Really means smart, notrailers is obsolete */
3680 { IFF_NOTRAILERS
, "smart" },
3682 { IFF_NOTRAILERS
, "notrailers" },
3686 { IFF_ALLMULTI
, "allmulti" },
3689 { IFF_MASTER
, "master" },
3692 { IFF_SLAVE
, "slave" },
3694 #ifdef IFF_MULTICAST
3695 { IFF_MULTICAST
, "multicast" },
3698 { IFF_PORTSEL
, "portsel" },
3700 #ifdef IFF_AUTOMEDIA
3701 { IFF_AUTOMEDIA
, "automedia" },
3704 { IFF_DYNAMIC
, "dynamic" },
3707 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3710 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3713 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3716 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3719 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3724 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3725 doc
: /* Return information about network interface named IFNAME.
3726 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3727 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3728 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3729 FLAGS is the current flags of the interface. */)
3730 (Lisp_Object ifname
)
3733 Lisp_Object res
= Qnil
;
3737 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3738 && defined HAVE_GETIFADDRS && defined LLADDR)
3739 struct ifaddrs
*ifap
;
3742 CHECK_STRING (ifname
);
3744 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3745 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3747 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3752 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3753 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3755 int flags
= rq
.ifr_flags
;
3756 const struct ifflag_def
*fp
;
3759 /* If flags is smaller than int (i.e. short) it may have the high bit set
3760 due to IFF_MULTICAST. In that case, sign extending it into
3762 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3763 flags
= (unsigned short) rq
.ifr_flags
;
3766 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3768 if (flags
& fp
->flag_bit
)
3770 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3771 flags
-= fp
->flag_bit
;
3774 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3778 elt
= Fcons (make_number (fnum
), elt
);
3783 res
= Fcons (elt
, res
);
3786 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3787 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3789 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3790 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3794 for (n
= 0; n
< 6; n
++)
3795 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3796 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3798 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3799 if (getifaddrs (&ifap
) != -1)
3801 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3802 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3805 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3807 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3808 unsigned char linkaddr
[6];
3811 if (it
->ifa_addr
->sa_family
!= AF_LINK
3812 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3813 || sdl
->sdl_alen
!= 6)
3816 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3817 for (n
= 0; n
< 6; n
++)
3818 p
->contents
[n
] = make_number (linkaddr
[n
]);
3820 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3824 #ifdef HAVE_FREEIFADDRS
3828 #endif /* HAVE_GETIFADDRS && LLADDR */
3830 res
= Fcons (elt
, res
);
3833 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3834 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3837 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3838 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3840 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3844 res
= Fcons (elt
, res
);
3847 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3848 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3851 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3854 res
= Fcons (elt
, res
);
3857 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3858 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3861 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3864 res
= Fcons (elt
, res
);
3868 return any
? res
: Qnil
;
3871 #endif /* defined (HAVE_NET_IF_H) */
3873 /* Turn off input and output for process PROC. */
3876 deactivate_process (Lisp_Object proc
)
3878 register int inchannel
, outchannel
;
3879 register struct Lisp_Process
*p
= XPROCESS (proc
);
3882 /* Delete GnuTLS structures in PROC, if any. */
3883 emacs_gnutls_deinit (proc
);
3884 #endif /* HAVE_GNUTLS */
3886 inchannel
= p
->infd
;
3887 outchannel
= p
->outfd
;
3889 #ifdef ADAPTIVE_READ_BUFFERING
3890 if (p
->read_output_delay
> 0)
3892 if (--process_output_delay_count
< 0)
3893 process_output_delay_count
= 0;
3894 p
->read_output_delay
= 0;
3895 p
->read_output_skip
= 0;
3901 /* Beware SIGCHLD hereabouts. */
3902 flush_pending_output (inchannel
);
3903 emacs_close (inchannel
);
3904 if (outchannel
>= 0 && outchannel
!= inchannel
)
3905 emacs_close (outchannel
);
3909 #ifdef DATAGRAM_SOCKETS
3910 if (DATAGRAM_CHAN_P (inchannel
))
3912 xfree (datagram_address
[inchannel
].sa
);
3913 datagram_address
[inchannel
].sa
= 0;
3914 datagram_address
[inchannel
].len
= 0;
3917 chan_process
[inchannel
] = Qnil
;
3918 FD_CLR (inchannel
, &input_wait_mask
);
3919 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3920 #ifdef NON_BLOCKING_CONNECT
3921 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3923 FD_CLR (inchannel
, &connect_wait_mask
);
3924 FD_CLR (inchannel
, &write_mask
);
3925 if (--num_pending_connects
< 0)
3929 if (inchannel
== max_process_desc
)
3932 /* We just closed the highest-numbered process input descriptor,
3933 so recompute the highest-numbered one now. */
3934 max_process_desc
= 0;
3935 for (i
= 0; i
< MAXDESC
; i
++)
3936 if (!NILP (chan_process
[i
]))
3937 max_process_desc
= i
;
3943 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3945 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3946 It is read into the process' buffers or given to their filter functions.
3947 Non-nil arg PROCESS means do not return until some output has been received
3950 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3951 and milliseconds to wait; return after that much time whether or not
3952 there is any subprocess output. If SECONDS is a floating point number,
3953 it specifies a fractional number of seconds to wait.
3954 The MILLISEC argument is obsolete and should be avoided.
3956 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3957 from PROCESS, suspending reading output from other processes.
3958 If JUST-THIS-ONE is an integer, don't run any timers either.
3959 Return non-nil if we received any output before the timeout expired. */)
3960 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3962 int secs
, usecs
= 0;
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
));
3981 if (!NILP (seconds
))
3983 if (INTEGERP (seconds
))
3984 secs
= XINT (seconds
);
3985 else if (FLOATP (seconds
))
3987 double timeout
= XFLOAT_DATA (seconds
);
3988 secs
= (int) timeout
;
3989 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3992 wrong_type_argument (Qnumberp
, seconds
);
3994 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3995 secs
= -1, usecs
= 0;
3998 secs
= NILP (process
) ? -1 : 0;
4001 (wait_reading_process_output (secs
, usecs
, 0, 0,
4003 !NILP (process
) ? XPROCESS (process
) : NULL
,
4004 NILP (just_this_one
) ? 0 :
4005 !INTEGERP (just_this_one
) ? 1 : -1)
4009 /* Accept a connection for server process SERVER on CHANNEL. */
4011 static int connect_counter
= 0;
4014 server_accept_connection (Lisp_Object server
, int channel
)
4016 Lisp_Object proc
, caller
, name
, buffer
;
4017 Lisp_Object contact
, host
, service
;
4018 struct Lisp_Process
*ps
= XPROCESS (server
);
4019 struct Lisp_Process
*p
;
4023 struct sockaddr_in in
;
4025 struct sockaddr_in6 in6
;
4027 #ifdef HAVE_LOCAL_SOCKETS
4028 struct sockaddr_un un
;
4031 socklen_t len
= sizeof saddr
;
4033 s
= accept (channel
, &saddr
.sa
, &len
);
4042 if (code
== EWOULDBLOCK
)
4046 if (!NILP (ps
->log
))
4047 call3 (ps
->log
, server
, Qnil
,
4048 concat3 (build_string ("accept failed with code"),
4049 Fnumber_to_string (make_number (code
)),
4050 build_string ("\n")));
4056 /* Setup a new process to handle the connection. */
4058 /* Generate a unique identification of the caller, and build contact
4059 information for this process. */
4062 switch (saddr
.sa
.sa_family
)
4066 Lisp_Object args
[5];
4067 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4068 args
[0] = build_string ("%d.%d.%d.%d");
4069 args
[1] = make_number (*ip
++);
4070 args
[2] = make_number (*ip
++);
4071 args
[3] = make_number (*ip
++);
4072 args
[4] = make_number (*ip
++);
4073 host
= Fformat (5, args
);
4074 service
= make_number (ntohs (saddr
.in
.sin_port
));
4076 args
[0] = build_string (" <%s:%d>");
4079 caller
= Fformat (3, args
);
4086 Lisp_Object args
[9];
4087 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4089 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4090 for (i
= 0; i
< 8; i
++)
4091 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4092 host
= Fformat (9, args
);
4093 service
= make_number (ntohs (saddr
.in
.sin_port
));
4095 args
[0] = build_string (" <[%s]:%d>");
4098 caller
= Fformat (3, args
);
4103 #ifdef HAVE_LOCAL_SOCKETS
4107 caller
= Fnumber_to_string (make_number (connect_counter
));
4108 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4112 /* Create a new buffer name for this process if it doesn't have a
4113 filter. The new buffer name is based on the buffer name or
4114 process name of the server process concatenated with the caller
4117 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4121 buffer
= ps
->buffer
;
4123 buffer
= Fbuffer_name (buffer
);
4128 buffer
= concat2 (buffer
, caller
);
4129 buffer
= Fget_buffer_create (buffer
);
4133 /* Generate a unique name for the new server process. Combine the
4134 server process name with the caller identification. */
4136 name
= concat2 (ps
->name
, caller
);
4137 proc
= make_process (name
);
4139 chan_process
[s
] = proc
;
4142 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4145 fcntl (s
, F_SETFL
, O_NDELAY
);
4149 p
= XPROCESS (proc
);
4151 /* Build new contact information for this setup. */
4152 contact
= Fcopy_sequence (ps
->childp
);
4153 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4154 contact
= Fplist_put (contact
, QChost
, host
);
4155 if (!NILP (service
))
4156 contact
= Fplist_put (contact
, QCservice
, service
);
4157 contact
= Fplist_put (contact
, QCremote
,
4158 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4159 #ifdef HAVE_GETSOCKNAME
4161 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4162 contact
= Fplist_put (contact
, QClocal
,
4163 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4166 p
->childp
= contact
;
4167 p
->plist
= Fcopy_sequence (ps
->plist
);
4171 p
->sentinel
= ps
->sentinel
;
4172 p
->filter
= ps
->filter
;
4179 /* Client processes for accepted connections are not stopped initially. */
4180 if (!EQ (p
->filter
, Qt
))
4182 FD_SET (s
, &input_wait_mask
);
4183 FD_SET (s
, &non_keyboard_wait_mask
);
4186 if (s
> max_process_desc
)
4187 max_process_desc
= s
;
4189 /* Setup coding system for new process based on server process.
4190 This seems to be the proper thing to do, as the coding system
4191 of the new process should reflect the settings at the time the
4192 server socket was opened; not the current settings. */
4194 p
->decode_coding_system
= ps
->decode_coding_system
;
4195 p
->encode_coding_system
= ps
->encode_coding_system
;
4196 setup_process_coding_systems (proc
);
4198 p
->decoding_buf
= empty_unibyte_string
;
4199 p
->decoding_carryover
= 0;
4200 p
->encoding_buf
= empty_unibyte_string
;
4202 p
->inherit_coding_system_flag
4203 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4205 if (!NILP (ps
->log
))
4206 call3 (ps
->log
, server
, proc
,
4207 concat3 (build_string ("accept from "),
4208 (STRINGP (host
) ? host
: build_string ("-")),
4209 build_string ("\n")));
4211 if (!NILP (p
->sentinel
))
4212 exec_sentinel (proc
,
4213 concat3 (build_string ("open from "),
4214 (STRINGP (host
) ? host
: build_string ("-")),
4215 build_string ("\n")));
4218 /* This variable is different from waiting_for_input in keyboard.c.
4219 It is used to communicate to a lisp process-filter/sentinel (via the
4220 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4221 for user-input when that process-filter was called.
4222 waiting_for_input cannot be used as that is by definition 0 when
4223 lisp code is being evalled.
4224 This is also used in record_asynch_buffer_change.
4225 For that purpose, this must be 0
4226 when not inside wait_reading_process_output. */
4227 static int waiting_for_user_input_p
;
4230 wait_reading_process_output_unwind (Lisp_Object data
)
4232 waiting_for_user_input_p
= XINT (data
);
4236 /* This is here so breakpoints can be put on it. */
4238 wait_reading_process_output_1 (void)
4242 /* Use a wrapper around select to work around a bug in gdb 5.3.
4243 Normally, the wrapper is optimized away by inlining.
4245 If emacs is stopped inside select, the gdb backtrace doesn't
4246 show the function which called select, so it is practically
4247 impossible to step through wait_reading_process_output. */
4251 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4253 return select (n
, rfd
, wfd
, xfd
, tmo
);
4255 #define select select_wrapper
4258 /* Read and dispose of subprocess output while waiting for timeout to
4259 elapse and/or keyboard input to be available.
4262 timeout in seconds, or
4263 zero for no limit, or
4264 -1 means gobble data immediately available but don't wait for any.
4267 an additional duration to wait, measured in microseconds.
4268 If this is nonzero and time_limit is 0, then the timeout
4269 consists of MICROSECS only.
4271 READ_KBD is a lisp value:
4272 0 to ignore keyboard input, or
4273 1 to return when input is available, or
4274 -1 meaning caller will actually read the input, so don't throw to
4275 the quit handler, or
4277 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4278 output that arrives.
4280 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4281 (and gobble terminal input into the buffer if any arrives).
4283 If WAIT_PROC is specified, wait until something arrives from that
4284 process. The return value is true if we read some input from
4287 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4288 (suspending output from other processes). A negative value
4289 means don't run any timers either.
4291 If WAIT_PROC is specified, then the function returns true if we
4292 received input from that process before the timeout elapsed.
4293 Otherwise, return true if we received input from any process. */
4296 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4298 Lisp_Object wait_for_cell
,
4299 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4301 register int channel
, nfds
;
4302 SELECT_TYPE Available
;
4303 SELECT_TYPE Writeok
;
4305 int check_delay
, no_avail
;
4308 EMACS_TIME timeout
, end_time
;
4309 int wait_channel
= -1;
4310 int got_some_input
= 0;
4311 int count
= SPECPDL_INDEX ();
4313 FD_ZERO (&Available
);
4316 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4317 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4318 message ("Blocking call to accept-process-output with quit inhibited!!");
4320 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4321 if (wait_proc
!= NULL
)
4322 wait_channel
= wait_proc
->infd
;
4324 record_unwind_protect (wait_reading_process_output_unwind
,
4325 make_number (waiting_for_user_input_p
));
4326 waiting_for_user_input_p
= read_kbd
;
4328 /* Since we may need to wait several times,
4329 compute the absolute time to return at. */
4330 if (time_limit
|| microsecs
)
4332 EMACS_GET_TIME (end_time
);
4333 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4334 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4339 int timeout_reduced_for_timers
= 0;
4341 /* If calling from keyboard input, do not quit
4342 since we want to return C-g as an input character.
4343 Otherwise, do pending quit if requested. */
4348 process_pending_signals ();
4351 /* Exit now if the cell we're waiting for became non-nil. */
4352 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4355 /* Compute time from now till when time limit is up */
4356 /* Exit if already run out */
4357 if (time_limit
== -1)
4359 /* -1 specified for timeout means
4360 gobble output available now
4361 but don't wait at all. */
4363 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4365 else if (time_limit
|| microsecs
)
4367 EMACS_GET_TIME (timeout
);
4368 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4369 if (EMACS_TIME_NEG_P (timeout
))
4374 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4377 /* Normally we run timers here.
4378 But not if wait_for_cell; in those cases,
4379 the wait is supposed to be short,
4380 and those callers cannot handle running arbitrary Lisp code here. */
4381 if (NILP (wait_for_cell
)
4382 && just_wait_proc
>= 0)
4384 EMACS_TIME timer_delay
;
4388 int old_timers_run
= timers_run
;
4389 struct buffer
*old_buffer
= current_buffer
;
4390 Lisp_Object old_window
= selected_window
;
4392 timer_delay
= timer_check ();
4394 /* If a timer has run, this might have changed buffers
4395 an alike. Make read_key_sequence aware of that. */
4396 if (timers_run
!= old_timers_run
4397 && (old_buffer
!= current_buffer
4398 || !EQ (old_window
, selected_window
))
4399 && waiting_for_user_input_p
== -1)
4400 record_asynch_buffer_change ();
4402 if (timers_run
!= old_timers_run
&& do_display
)
4403 /* We must retry, since a timer may have requeued itself
4404 and that could alter the time_delay. */
4405 redisplay_preserve_echo_area (9);
4409 while (!detect_input_pending ());
4411 /* If there is unread keyboard input, also return. */
4413 && requeued_events_pending_p ())
4416 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4418 EMACS_TIME difference
;
4419 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4420 if (EMACS_TIME_NEG_P (difference
))
4422 timeout
= timer_delay
;
4423 timeout_reduced_for_timers
= 1;
4426 /* If time_limit is -1, we are not going to wait at all. */
4427 else if (time_limit
!= -1)
4429 /* This is so a breakpoint can be put here. */
4430 wait_reading_process_output_1 ();
4434 /* Cause C-g and alarm signals to take immediate action,
4435 and cause input available signals to zero out timeout.
4437 It is important that we do this before checking for process
4438 activity. If we get a SIGCHLD after the explicit checks for
4439 process activity, timeout is the only way we will know. */
4441 set_waiting_for_input (&timeout
);
4443 /* If status of something has changed, and no input is
4444 available, notify the user of the change right away. After
4445 this explicit check, we'll let the SIGCHLD handler zap
4446 timeout to get our attention. */
4447 if (update_tick
!= process_tick
)
4452 if (kbd_on_hold_p ())
4455 Atemp
= input_wait_mask
;
4458 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4459 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4461 #ifdef NON_BLOCKING_CONNECT
4462 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4466 (SELECT_TYPE
*)0, &timeout
)
4469 /* It's okay for us to do this and then continue with
4470 the loop, since timeout has already been zeroed out. */
4471 clear_waiting_for_input ();
4472 status_notify (NULL
);
4473 if (do_display
) redisplay_preserve_echo_area (13);
4477 /* Don't wait for output from a non-running process. Just
4478 read whatever data has already been received. */
4479 if (wait_proc
&& wait_proc
->raw_status_new
)
4480 update_status (wait_proc
);
4482 && ! EQ (wait_proc
->status
, Qrun
)
4483 && ! EQ (wait_proc
->status
, Qconnect
))
4485 int nread
, total_nread
= 0;
4487 clear_waiting_for_input ();
4488 XSETPROCESS (proc
, wait_proc
);
4490 /* Read data from the process, until we exhaust it. */
4491 while (wait_proc
->infd
>= 0)
4493 nread
= read_process_output (proc
, wait_proc
->infd
);
4500 total_nread
+= nread
;
4504 else if (nread
== -1 && EIO
== errno
)
4508 else if (nread
== -1 && EAGAIN
== errno
)
4512 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4516 if (total_nread
> 0 && do_display
)
4517 redisplay_preserve_echo_area (10);
4522 /* Wait till there is something to do */
4524 if (wait_proc
&& just_wait_proc
)
4526 if (wait_proc
->infd
< 0) /* Terminated */
4528 FD_SET (wait_proc
->infd
, &Available
);
4532 else if (!NILP (wait_for_cell
))
4534 Available
= non_process_wait_mask
;
4541 Available
= non_keyboard_wait_mask
;
4543 Available
= input_wait_mask
;
4544 Writeok
= write_mask
;
4545 #ifdef SELECT_CANT_DO_WRITE_MASK
4550 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4553 /* If frame size has changed or the window is newly mapped,
4554 redisplay now, before we start to wait. There is a race
4555 condition here; if a SIGIO arrives between now and the select
4556 and indicates that a frame is trashed, the select may block
4557 displaying a trashed screen. */
4558 if (frame_garbaged
&& do_display
)
4560 clear_waiting_for_input ();
4561 redisplay_preserve_echo_area (11);
4563 set_waiting_for_input (&timeout
);
4566 /* Skip the `select' call if input is available and we're
4567 waiting for keyboard input or a cell change (which can be
4568 triggered by processing X events). In the latter case, set
4569 nfds to 1 to avoid breaking the loop. */
4571 if ((read_kbd
|| !NILP (wait_for_cell
))
4572 && detect_input_pending ())
4574 nfds
= read_kbd
? 0 : 1;
4581 #ifdef ADAPTIVE_READ_BUFFERING
4582 /* Set the timeout for adaptive read buffering if any
4583 process has non-zero read_output_skip and non-zero
4584 read_output_delay, and we are not reading output for a
4585 specific wait_channel. It is not executed if
4586 Vprocess_adaptive_read_buffering is nil. */
4587 if (process_output_skip
&& check_delay
> 0)
4589 int usecs
= EMACS_USECS (timeout
);
4590 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4591 usecs
= READ_OUTPUT_DELAY_MAX
;
4592 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4594 proc
= chan_process
[channel
];
4597 /* Find minimum non-zero read_output_delay among the
4598 processes with non-zero read_output_skip. */
4599 if (XPROCESS (proc
)->read_output_delay
> 0)
4602 if (!XPROCESS (proc
)->read_output_skip
)
4604 FD_CLR (channel
, &Available
);
4605 XPROCESS (proc
)->read_output_skip
= 0;
4606 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4607 usecs
= XPROCESS (proc
)->read_output_delay
;
4610 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4611 process_output_skip
= 0;
4614 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4616 #elif defined (HAVE_NS)
4621 (max (max_process_desc
, max_input_desc
) + 1,
4623 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4624 (SELECT_TYPE
*)0, &timeout
);
4627 /* GnuTLS buffers data internally. In lowat mode it leaves
4628 some data in the TCP buffers so that select works, but
4629 with custom pull/push functions we need to check if some
4630 data is available in the buffers manually. */
4635 /* We're not waiting on a specific process, so loop
4636 through all the channels and check for data.
4637 This is a workaround needed for some versions of
4638 the gnutls library -- 2.12.14 has been confirmed
4640 http://comments.gmane.org/gmane.emacs.devel/145074 */
4641 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4642 if (! NILP (chan_process
[channel
]))
4644 struct Lisp_Process
*p
=
4645 XPROCESS (chan_process
[channel
]);
4646 if (p
&& p
->gnutls_p
&& p
->infd
4647 && ((emacs_gnutls_record_check_pending
4652 FD_SET (p
->infd
, &Available
);
4658 /* Check this specific channel. */
4659 if (wait_proc
->gnutls_p
/* Check for valid process. */
4660 /* Do we have pending data? */
4661 && ((emacs_gnutls_record_check_pending
4662 (wait_proc
->gnutls_state
))
4666 /* Set to Available. */
4667 FD_SET (wait_proc
->infd
, &Available
);
4676 /* Make C-g and alarm signals set flags again */
4677 clear_waiting_for_input ();
4679 /* If we woke up due to SIGWINCH, actually change size now. */
4680 do_pending_window_change (0);
4682 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4683 /* We wanted the full specified time, so return now. */
4687 if (xerrno
== EINTR
)
4689 else if (xerrno
== EBADF
)
4692 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4693 the child's closure of the pts gives the parent a SIGHUP, and
4694 the ptc file descriptor is automatically closed,
4695 yielding EBADF here or at select() call above.
4696 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4697 in m/ibmrt-aix.h), and here we just ignore the select error.
4698 Cleanup occurs c/o status_notify after SIGCLD. */
4699 no_avail
= 1; /* Cannot depend on values returned */
4705 error ("select error: %s", emacs_strerror (xerrno
));
4710 FD_ZERO (&Available
);
4714 #if 0 /* When polling is used, interrupt_input is 0,
4715 so get_input_pending should read the input.
4716 So this should not be needed. */
4717 /* If we are using polling for input,
4718 and we see input available, make it get read now.
4719 Otherwise it might not actually get read for a second.
4720 And on hpux, since we turn off polling in wait_reading_process_output,
4721 it might never get read at all if we don't spend much time
4722 outside of wait_reading_process_output. */
4723 if (read_kbd
&& interrupt_input
4724 && keyboard_bit_set (&Available
)
4725 && input_polling_used ())
4726 kill (getpid (), SIGALRM
);
4729 /* Check for keyboard input */
4730 /* If there is any, return immediately
4731 to give it higher priority than subprocesses */
4735 int old_timers_run
= timers_run
;
4736 struct buffer
*old_buffer
= current_buffer
;
4737 Lisp_Object old_window
= selected_window
;
4740 if (detect_input_pending_run_timers (do_display
))
4742 swallow_events (do_display
);
4743 if (detect_input_pending_run_timers (do_display
))
4747 /* If a timer has run, this might have changed buffers
4748 an alike. Make read_key_sequence aware of that. */
4749 if (timers_run
!= old_timers_run
4750 && waiting_for_user_input_p
== -1
4751 && (old_buffer
!= current_buffer
4752 || !EQ (old_window
, selected_window
)))
4753 record_asynch_buffer_change ();
4759 /* If there is unread keyboard input, also return. */
4761 && requeued_events_pending_p ())
4764 /* If we are not checking for keyboard input now,
4765 do process events (but don't run any timers).
4766 This is so that X events will be processed.
4767 Otherwise they may have to wait until polling takes place.
4768 That would causes delays in pasting selections, for example.
4770 (We used to do this only if wait_for_cell.) */
4771 if (read_kbd
== 0 && detect_input_pending ())
4773 swallow_events (do_display
);
4774 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4775 if (detect_input_pending ())
4780 /* Exit now if the cell we're waiting for became non-nil. */
4781 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4785 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4786 go read it. This can happen with X on BSD after logging out.
4787 In that case, there really is no input and no SIGIO,
4788 but select says there is input. */
4790 if (read_kbd
&& interrupt_input
4791 && keyboard_bit_set (&Available
) && ! noninteractive
)
4792 kill (getpid (), SIGIO
);
4796 got_some_input
|= nfds
> 0;
4798 /* If checking input just got us a size-change event from X,
4799 obey it now if we should. */
4800 if (read_kbd
|| ! NILP (wait_for_cell
))
4801 do_pending_window_change (0);
4803 /* Check for data from a process. */
4804 if (no_avail
|| nfds
== 0)
4807 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4809 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4810 if (FD_ISSET (channel
, &Available
)
4812 && (d
->condition
& FOR_READ
) != 0)
4813 d
->func (channel
, d
->data
, 1);
4814 if (FD_ISSET (channel
, &write_mask
)
4816 && (d
->condition
& FOR_WRITE
) != 0)
4817 d
->func (channel
, d
->data
, 0);
4820 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4822 if (FD_ISSET (channel
, &Available
)
4823 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4824 && !FD_ISSET (channel
, &non_process_wait_mask
))
4828 /* If waiting for this channel, arrange to return as
4829 soon as no more input to be processed. No more
4831 if (wait_channel
== channel
)
4837 proc
= chan_process
[channel
];
4841 /* If this is a server stream socket, accept connection. */
4842 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4844 server_accept_connection (proc
, channel
);
4848 /* Read data from the process, starting with our
4849 buffered-ahead character if we have one. */
4851 nread
= read_process_output (proc
, channel
);
4854 /* Since read_process_output can run a filter,
4855 which can call accept-process-output,
4856 don't try to read from any other processes
4857 before doing the select again. */
4858 FD_ZERO (&Available
);
4861 redisplay_preserve_echo_area (12);
4864 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4867 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4868 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4870 else if (nread
== -1 && errno
== EAGAIN
)
4874 else if (nread
== -1 && errno
== EAGAIN
)
4876 /* Note that we cannot distinguish between no input
4877 available now and a closed pipe.
4878 With luck, a closed pipe will be accompanied by
4879 subprocess termination and SIGCHLD. */
4880 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4882 #endif /* O_NDELAY */
4883 #endif /* O_NONBLOCK */
4885 /* On some OSs with ptys, when the process on one end of
4886 a pty exits, the other end gets an error reading with
4887 errno = EIO instead of getting an EOF (0 bytes read).
4888 Therefore, if we get an error reading and errno =
4889 EIO, just continue, because the child process has
4890 exited and should clean itself up soon (e.g. when we
4893 However, it has been known to happen that the SIGCHLD
4894 got lost. So raise the signal again just in case.
4896 else if (nread
== -1 && errno
== EIO
)
4898 /* Don't do anything if only a pty, with no associated
4899 process (bug#10933). */
4900 if (XPROCESS (proc
)->pid
!= -2) {
4901 /* Clear the descriptor now, so we only raise the signal
4903 FD_CLR (channel
, &input_wait_mask
);
4904 FD_CLR (channel
, &non_keyboard_wait_mask
);
4906 kill (getpid (), SIGCHLD
);
4909 #endif /* HAVE_PTYS */
4910 /* If we can detect process termination, don't consider the
4911 process gone just because its pipe is closed. */
4913 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4918 /* Preserve status of processes already terminated. */
4919 XPROCESS (proc
)->tick
= ++process_tick
;
4920 deactivate_process (proc
);
4921 if (XPROCESS (proc
)->raw_status_new
)
4922 update_status (XPROCESS (proc
));
4923 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4924 XPROCESS (proc
)->status
4925 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4928 #ifdef NON_BLOCKING_CONNECT
4929 if (FD_ISSET (channel
, &Writeok
)
4930 && FD_ISSET (channel
, &connect_wait_mask
))
4932 struct Lisp_Process
*p
;
4934 FD_CLR (channel
, &connect_wait_mask
);
4935 FD_CLR (channel
, &write_mask
);
4936 if (--num_pending_connects
< 0)
4939 proc
= chan_process
[channel
];
4943 p
= XPROCESS (proc
);
4946 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4947 So only use it on systems where it is known to work. */
4949 socklen_t xlen
= sizeof (xerrno
);
4950 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4955 struct sockaddr pname
;
4956 int pnamelen
= sizeof (pname
);
4958 /* If connection failed, getpeername will fail. */
4960 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4962 /* Obtain connect failure code through error slippage. */
4965 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4972 p
->tick
= ++process_tick
;
4973 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4974 deactivate_process (proc
);
4979 /* Execute the sentinel here. If we had relied on
4980 status_notify to do it later, it will read input
4981 from the process before calling the sentinel. */
4982 exec_sentinel (proc
, build_string ("open\n"));
4983 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4985 FD_SET (p
->infd
, &input_wait_mask
);
4986 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4990 #endif /* NON_BLOCKING_CONNECT */
4991 } /* end for each file descriptor */
4992 } /* end while exit conditions not met */
4994 unbind_to (count
, Qnil
);
4996 /* If calling from keyboard input, do not quit
4997 since we want to return C-g as an input character.
4998 Otherwise, do pending quit if requested. */
5001 /* Prevent input_pending from remaining set if we quit. */
5002 clear_input_pending ();
5006 return got_some_input
;
5009 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5012 read_process_output_call (Lisp_Object fun_and_args
)
5014 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5018 read_process_output_error_handler (Lisp_Object error_val
)
5020 cmd_error_internal (error_val
, "error in process filter: ");
5022 update_echo_area ();
5023 Fsleep_for (make_number (2), Qnil
);
5027 /* Read pending output from the process channel,
5028 starting with our buffered-ahead character if we have one.
5029 Yield number of decoded characters read.
5031 This function reads at most 4096 characters.
5032 If you want to read all available subprocess output,
5033 you must call it repeatedly until it returns zero.
5035 The characters read are decoded according to PROC's coding-system
5039 read_process_output (Lisp_Object proc
, register int channel
)
5041 register ssize_t nbytes
;
5043 register Lisp_Object outstream
;
5044 register struct Lisp_Process
*p
= XPROCESS (proc
);
5045 register EMACS_INT opoint
;
5046 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5047 int carryover
= p
->decoding_carryover
;
5049 int count
= SPECPDL_INDEX ();
5050 Lisp_Object odeactivate
;
5052 chars
= (char *) alloca (carryover
+ readmax
);
5054 /* See the comment above. */
5055 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5057 #ifdef DATAGRAM_SOCKETS
5058 /* We have a working select, so proc_buffered_char is always -1. */
5059 if (DATAGRAM_CHAN_P (channel
))
5061 socklen_t len
= datagram_address
[channel
].len
;
5062 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5063 0, datagram_address
[channel
].sa
, &len
);
5068 int buffered
= 0 <= proc_buffered_char
[channel
];
5071 chars
[carryover
] = proc_buffered_char
[channel
];
5072 proc_buffered_char
[channel
] = -1;
5076 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5077 readmax
- buffered
);
5080 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5081 readmax
- buffered
);
5082 #ifdef ADAPTIVE_READ_BUFFERING
5083 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5085 int delay
= p
->read_output_delay
;
5088 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5091 process_output_delay_count
++;
5092 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5095 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5097 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5099 process_output_delay_count
--;
5101 p
->read_output_delay
= delay
;
5104 p
->read_output_skip
= 1;
5105 process_output_skip
= 1;
5110 nbytes
+= buffered
&& nbytes
<= 0;
5113 p
->decoding_carryover
= 0;
5115 /* At this point, NBYTES holds number of bytes just received
5116 (including the one in proc_buffered_char[channel]). */
5119 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5121 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5124 /* Now set NBYTES how many bytes we must decode. */
5125 nbytes
+= carryover
;
5127 odeactivate
= Vdeactivate_mark
;
5128 /* There's no good reason to let process filters change the current
5129 buffer, and many callers of accept-process-output, sit-for, and
5130 friends don't expect current-buffer to be changed from under them. */
5131 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5133 /* Read and dispose of the process output. */
5134 outstream
= p
->filter
;
5135 if (!NILP (outstream
))
5138 int outer_running_asynch_code
= running_asynch_code
;
5139 int waiting
= waiting_for_user_input_p
;
5141 /* No need to gcpro these, because all we do with them later
5142 is test them for EQness, and none of them should be a string. */
5144 Lisp_Object obuffer
, okeymap
;
5145 XSETBUFFER (obuffer
, current_buffer
);
5146 okeymap
= BVAR (current_buffer
, keymap
);
5149 /* We inhibit quit here instead of just catching it so that
5150 hitting ^G when a filter happens to be running won't screw
5152 specbind (Qinhibit_quit
, Qt
);
5153 specbind (Qlast_nonmenu_event
, Qt
);
5155 /* In case we get recursively called,
5156 and we already saved the match data nonrecursively,
5157 save the same match data in safely recursive fashion. */
5158 if (outer_running_asynch_code
)
5161 /* Don't clobber the CURRENT match data, either! */
5162 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5163 restore_search_regs ();
5164 record_unwind_save_match_data ();
5165 Fset_match_data (tem
, Qt
);
5168 /* For speed, if a search happens within this code,
5169 save the match data in a special nonrecursive fashion. */
5170 running_asynch_code
= 1;
5172 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5173 text
= coding
->dst_object
;
5174 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5175 /* A new coding system might be found. */
5176 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5178 p
->decode_coding_system
= Vlast_coding_system_used
;
5180 /* Don't call setup_coding_system for
5181 proc_decode_coding_system[channel] here. It is done in
5182 detect_coding called via decode_coding above. */
5184 /* If a coding system for encoding is not yet decided, we set
5185 it as the same as coding-system for decoding.
5187 But, before doing that we must check if
5188 proc_encode_coding_system[p->outfd] surely points to a
5189 valid memory because p->outfd will be changed once EOF is
5190 sent to the process. */
5191 if (NILP (p
->encode_coding_system
)
5192 && proc_encode_coding_system
[p
->outfd
])
5194 p
->encode_coding_system
5195 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5196 setup_coding_system (p
->encode_coding_system
,
5197 proc_encode_coding_system
[p
->outfd
]);
5201 if (coding
->carryover_bytes
> 0)
5203 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5204 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5205 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5206 coding
->carryover_bytes
);
5207 p
->decoding_carryover
= coding
->carryover_bytes
;
5209 if (SBYTES (text
) > 0)
5210 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5211 sometimes it's simply wrong to wrap (e.g. when called from
5212 accept-process-output). */
5213 internal_condition_case_1 (read_process_output_call
,
5215 Fcons (proc
, Fcons (text
, Qnil
))),
5216 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5217 read_process_output_error_handler
);
5219 /* If we saved the match data nonrecursively, restore it now. */
5220 restore_search_regs ();
5221 running_asynch_code
= outer_running_asynch_code
;
5223 /* Restore waiting_for_user_input_p as it was
5224 when we were called, in case the filter clobbered it. */
5225 waiting_for_user_input_p
= waiting
;
5227 #if 0 /* Call record_asynch_buffer_change unconditionally,
5228 because we might have changed minor modes or other things
5229 that affect key bindings. */
5230 if (! EQ (Fcurrent_buffer (), obuffer
)
5231 || ! EQ (current_buffer
->keymap
, okeymap
))
5233 /* But do it only if the caller is actually going to read events.
5234 Otherwise there's no need to make him wake up, and it could
5235 cause trouble (for example it would make sit_for return). */
5236 if (waiting_for_user_input_p
== -1)
5237 record_asynch_buffer_change ();
5240 /* If no filter, write into buffer if it isn't dead. */
5241 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5243 Lisp_Object old_read_only
;
5244 EMACS_INT old_begv
, old_zv
;
5245 EMACS_INT old_begv_byte
, old_zv_byte
;
5246 EMACS_INT before
, before_byte
;
5247 EMACS_INT opoint_byte
;
5251 Fset_buffer (p
->buffer
);
5253 opoint_byte
= PT_BYTE
;
5254 old_read_only
= BVAR (current_buffer
, read_only
);
5257 old_begv_byte
= BEGV_BYTE
;
5258 old_zv_byte
= ZV_BYTE
;
5260 BVAR (current_buffer
, read_only
) = Qnil
;
5262 /* Insert new output into buffer
5263 at the current end-of-output marker,
5264 thus preserving logical ordering of input and output. */
5265 if (XMARKER (p
->mark
)->buffer
)
5266 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5267 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5270 SET_PT_BOTH (ZV
, ZV_BYTE
);
5272 before_byte
= PT_BYTE
;
5274 /* If the output marker is outside of the visible region, save
5275 the restriction and widen. */
5276 if (! (BEGV
<= PT
&& PT
<= ZV
))
5279 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5280 text
= coding
->dst_object
;
5281 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5282 /* A new coding system might be found. See the comment in the
5283 similar code in the previous `if' block. */
5284 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5286 p
->decode_coding_system
= Vlast_coding_system_used
;
5287 if (NILP (p
->encode_coding_system
)
5288 && proc_encode_coding_system
[p
->outfd
])
5290 p
->encode_coding_system
5291 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5292 setup_coding_system (p
->encode_coding_system
,
5293 proc_encode_coding_system
[p
->outfd
]);
5296 if (coding
->carryover_bytes
> 0)
5298 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5299 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5300 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5301 coding
->carryover_bytes
);
5302 p
->decoding_carryover
= coding
->carryover_bytes
;
5304 /* Adjust the multibyteness of TEXT to that of the buffer. */
5305 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5306 != ! STRING_MULTIBYTE (text
))
5307 text
= (STRING_MULTIBYTE (text
)
5308 ? Fstring_as_unibyte (text
)
5309 : Fstring_to_multibyte (text
));
5310 /* Insert before markers in case we are inserting where
5311 the buffer's mark is, and the user's next command is Meta-y. */
5312 insert_from_string_before_markers (text
, 0, 0,
5313 SCHARS (text
), SBYTES (text
), 0);
5315 /* Make sure the process marker's position is valid when the
5316 process buffer is changed in the signal_after_change above.
5317 W3 is known to do that. */
5318 if (BUFFERP (p
->buffer
)
5319 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5320 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5322 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5324 update_mode_lines
++;
5326 /* Make sure opoint and the old restrictions
5327 float ahead of any new text just as point would. */
5328 if (opoint
>= before
)
5330 opoint
+= PT
- before
;
5331 opoint_byte
+= PT_BYTE
- before_byte
;
5333 if (old_begv
> before
)
5335 old_begv
+= PT
- before
;
5336 old_begv_byte
+= PT_BYTE
- before_byte
;
5338 if (old_zv
>= before
)
5340 old_zv
+= PT
- before
;
5341 old_zv_byte
+= PT_BYTE
- before_byte
;
5344 /* If the restriction isn't what it should be, set it. */
5345 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5346 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5349 BVAR (current_buffer
, read_only
) = old_read_only
;
5350 SET_PT_BOTH (opoint
, opoint_byte
);
5352 /* Handling the process output should not deactivate the mark. */
5353 Vdeactivate_mark
= odeactivate
;
5355 unbind_to (count
, Qnil
);
5359 /* Sending data to subprocess */
5361 static jmp_buf send_process_frame
;
5362 static Lisp_Object process_sent_to
;
5364 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5365 static void send_process_trap (int) NO_RETURN
;
5369 send_process_trap (int ignore
)
5371 SIGNAL_THREAD_CHECK (SIGPIPE
);
5372 sigunblock (sigmask (SIGPIPE
));
5373 longjmp (send_process_frame
, 1);
5376 /* Send some data to process PROC.
5377 BUF is the beginning of the data; LEN is the number of characters.
5378 OBJECT is the Lisp object that the data comes from. If OBJECT is
5379 nil or t, it means that the data comes from C string.
5381 If OBJECT is not nil, the data is encoded by PROC's coding-system
5382 for encoding before it is sent.
5384 This function can evaluate Lisp code and can garbage collect. */
5387 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5388 volatile EMACS_INT len
, volatile Lisp_Object object
)
5390 /* Use volatile to protect variables from being clobbered by longjmp. */
5391 struct Lisp_Process
*p
= XPROCESS (proc
);
5393 struct coding_system
*coding
;
5394 struct gcpro gcpro1
;
5395 void (*volatile old_sigpipe
) (int);
5399 if (p
->raw_status_new
)
5401 if (! EQ (p
->status
, Qrun
))
5402 error ("Process %s not running", SDATA (p
->name
));
5404 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5406 coding
= proc_encode_coding_system
[p
->outfd
];
5407 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5409 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5410 || (BUFFERP (object
)
5411 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5414 p
->encode_coding_system
5415 = complement_process_encoding_system (p
->encode_coding_system
);
5416 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5418 /* The coding system for encoding was changed to raw-text
5419 because we sent a unibyte text previously. Now we are
5420 sending a multibyte text, thus we must encode it by the
5421 original coding system specified for the current process.
5423 Another reason we come here is that the coding system
5424 was just complemented and a new one was returned by
5425 complement_process_encoding_system. */
5426 setup_coding_system (p
->encode_coding_system
, coding
);
5427 Vlast_coding_system_used
= p
->encode_coding_system
;
5429 coding
->src_multibyte
= 1;
5433 coding
->src_multibyte
= 0;
5434 /* For sending a unibyte text, character code conversion should
5435 not take place but EOL conversion should. So, setup raw-text
5436 or one of the subsidiary if we have not yet done it. */
5437 if (CODING_REQUIRE_ENCODING (coding
))
5439 if (CODING_REQUIRE_FLUSHING (coding
))
5441 /* But, before changing the coding, we must flush out data. */
5442 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5443 send_process (proc
, "", 0, Qt
);
5444 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5446 setup_coding_system (raw_text_coding_system
5447 (Vlast_coding_system_used
),
5449 coding
->src_multibyte
= 0;
5452 coding
->dst_multibyte
= 0;
5454 if (CODING_REQUIRE_ENCODING (coding
))
5456 coding
->dst_object
= Qt
;
5457 if (BUFFERP (object
))
5459 EMACS_INT from_byte
, from
, to
;
5460 EMACS_INT save_pt
, save_pt_byte
;
5461 struct buffer
*cur
= current_buffer
;
5463 set_buffer_internal (XBUFFER (object
));
5464 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5466 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5467 from
= BYTE_TO_CHAR (from_byte
);
5468 to
= BYTE_TO_CHAR (from_byte
+ len
);
5469 TEMP_SET_PT_BOTH (from
, from_byte
);
5470 encode_coding_object (coding
, object
, from
, from_byte
,
5471 to
, from_byte
+ len
, Qt
);
5472 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5473 set_buffer_internal (cur
);
5475 else if (STRINGP (object
))
5477 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5478 SBYTES (object
), Qt
);
5482 coding
->dst_object
= make_unibyte_string (buf
, len
);
5483 coding
->produced
= len
;
5486 len
= coding
->produced
;
5487 object
= coding
->dst_object
;
5488 buf
= SSDATA (object
);
5491 if (pty_max_bytes
== 0)
5493 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5494 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5495 if (pty_max_bytes
< 0)
5496 pty_max_bytes
= 250;
5498 pty_max_bytes
= 250;
5500 /* Deduct one, to leave space for the eof. */
5504 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5505 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5506 when returning with longjmp despite being declared volatile. */
5507 if (!setjmp (send_process_frame
))
5509 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5511 process_sent_to
= proc
;
5514 EMACS_INT
this = len
;
5516 /* Send this batch, using one or more write calls. */
5519 EMACS_INT written
= 0;
5520 int outfd
= p
->outfd
;
5521 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5522 #ifdef DATAGRAM_SOCKETS
5523 if (DATAGRAM_CHAN_P (outfd
))
5525 rv
= sendto (outfd
, buf
, this,
5526 0, datagram_address
[outfd
].sa
,
5527 datagram_address
[outfd
].len
);
5530 else if (errno
== EMSGSIZE
)
5532 signal (SIGPIPE
, old_sigpipe
);
5533 report_file_error ("sending datagram",
5534 Fcons (proc
, Qnil
));
5542 written
= emacs_gnutls_write (p
, buf
, this);
5545 written
= emacs_write (outfd
, buf
, this);
5546 rv
= (written
? 0 : -1);
5547 #ifdef ADAPTIVE_READ_BUFFERING
5548 if (p
->read_output_delay
> 0
5549 && p
->adaptive_read_buffering
== 1)
5551 p
->read_output_delay
= 0;
5552 process_output_delay_count
--;
5553 p
->read_output_skip
= 0;
5557 signal (SIGPIPE
, old_sigpipe
);
5563 || errno
== EWOULDBLOCK
5569 /* Buffer is full. Wait, accepting input;
5570 that may allow the program
5571 to finish doing output and read more. */
5573 EMACS_INT offset
= 0;
5575 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5576 /* A gross hack to work around a bug in FreeBSD.
5577 In the following sequence, read(2) returns
5581 write(2) 954 bytes, get EAGAIN
5582 read(2) 1024 bytes in process_read_output
5583 read(2) 11 bytes in process_read_output
5585 That is, read(2) returns more bytes than have
5586 ever been written successfully. The 1033 bytes
5587 read are the 1022 bytes written successfully
5588 after processing (for example with CRs added if
5589 the terminal is set up that way which it is
5590 here). The same bytes will be seen again in a
5591 later read(2), without the CRs. */
5593 if (errno
== EAGAIN
)
5596 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5598 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5600 /* Running filters might relocate buffers or strings.
5601 Arrange to relocate BUF. */
5602 if (BUFFERP (object
))
5603 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5604 (unsigned char *) buf
);
5605 else if (STRINGP (object
))
5606 offset
= buf
- SSDATA (object
);
5608 #ifdef EMACS_HAS_USECS
5609 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5611 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5614 if (BUFFERP (object
))
5615 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5617 else if (STRINGP (object
))
5618 buf
= offset
+ SSDATA (object
);
5621 /* This is a real error. */
5622 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5632 signal (SIGPIPE
, old_sigpipe
);
5633 proc
= process_sent_to
;
5634 p
= XPROCESS (proc
);
5635 p
->raw_status_new
= 0;
5636 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5637 p
->tick
= ++process_tick
;
5638 deactivate_process (proc
);
5639 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5645 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5647 doc
: /* Send current contents of region as input to PROCESS.
5648 PROCESS may be a process, a buffer, the name of a process or buffer, or
5649 nil, indicating the current buffer's process.
5650 Called from program, takes three arguments, PROCESS, START and END.
5651 If the region is more than 500 characters long,
5652 it is sent in several bunches. This may happen even for shorter regions.
5653 Output from processes can arrive in between bunches. */)
5654 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5657 EMACS_INT start1
, end1
;
5659 proc
= get_process (process
);
5660 validate_region (&start
, &end
);
5662 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5663 move_gap (XINT (start
));
5665 start1
= CHAR_TO_BYTE (XINT (start
));
5666 end1
= CHAR_TO_BYTE (XINT (end
));
5667 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5668 Fcurrent_buffer ());
5673 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5675 doc
: /* Send PROCESS the contents of STRING as input.
5676 PROCESS may be a process, a buffer, the name of a process or buffer, or
5677 nil, indicating the current buffer's process.
5678 If STRING is more than 500 characters long,
5679 it is sent in several bunches. This may happen even for shorter strings.
5680 Output from processes can arrive in between bunches. */)
5681 (Lisp_Object process
, Lisp_Object string
)
5684 CHECK_STRING (string
);
5685 proc
= get_process (process
);
5686 send_process (proc
, SSDATA (string
),
5687 SBYTES (string
), string
);
5691 /* Return the foreground process group for the tty/pty that
5692 the process P uses. */
5694 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5699 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5702 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5703 master side. Try the slave side. */
5704 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5708 ioctl (fd
, TIOCGPGRP
, &gid
);
5712 #endif /* defined (TIOCGPGRP ) */
5717 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5718 Sprocess_running_child_p
, 0, 1, 0,
5719 doc
: /* Return t if PROCESS has given the terminal to a child.
5720 If the operating system does not make it possible to find out,
5721 return t unconditionally. */)
5722 (Lisp_Object process
)
5724 /* Initialize in case ioctl doesn't exist or gives an error,
5725 in a way that will cause returning t. */
5728 struct Lisp_Process
*p
;
5730 proc
= get_process (process
);
5731 p
= XPROCESS (proc
);
5733 if (!EQ (p
->type
, Qreal
))
5734 error ("Process %s is not a subprocess",
5737 error ("Process %s is not active",
5740 gid
= emacs_get_tty_pgrp (p
);
5747 /* send a signal number SIGNO to PROCESS.
5748 If CURRENT_GROUP is t, that means send to the process group
5749 that currently owns the terminal being used to communicate with PROCESS.
5750 This is used for various commands in shell mode.
5751 If CURRENT_GROUP is lambda, that means send to the process group
5752 that currently owns the terminal, but only if it is NOT the shell itself.
5754 If NOMSG is zero, insert signal-announcements into process's buffers
5757 If we can, we try to signal PROCESS by sending control characters
5758 down the pty. This allows us to signal inferiors who have changed
5759 their uid, for which killpg would return an EPERM error. */
5762 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5766 register struct Lisp_Process
*p
;
5770 proc
= get_process (process
);
5771 p
= XPROCESS (proc
);
5773 if (!EQ (p
->type
, Qreal
))
5774 error ("Process %s is not a subprocess",
5777 error ("Process %s is not active",
5781 current_group
= Qnil
;
5783 /* If we are using pgrps, get a pgrp number and make it negative. */
5784 if (NILP (current_group
))
5785 /* Send the signal to the shell's process group. */
5789 #ifdef SIGNALS_VIA_CHARACTERS
5790 /* If possible, send signals to the entire pgrp
5791 by sending an input character to it. */
5794 cc_t
*sig_char
= NULL
;
5796 tcgetattr (p
->infd
, &t
);
5801 sig_char
= &t
.c_cc
[VINTR
];
5805 sig_char
= &t
.c_cc
[VQUIT
];
5809 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5810 sig_char
= &t
.c_cc
[VSWTCH
];
5812 sig_char
= &t
.c_cc
[VSUSP
];
5817 if (sig_char
&& *sig_char
!= CDISABLE
)
5819 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5822 /* If we can't send the signal with a character,
5823 fall through and send it another way. */
5825 /* The code above may fall through if it can't
5826 handle the signal. */
5827 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5830 /* Get the current pgrp using the tty itself, if we have that.
5831 Otherwise, use the pty to get the pgrp.
5832 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5833 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5834 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5835 His patch indicates that if TIOCGPGRP returns an error, then
5836 we should just assume that p->pid is also the process group id. */
5838 gid
= emacs_get_tty_pgrp (p
);
5841 /* If we can't get the information, assume
5842 the shell owns the tty. */
5845 /* It is not clear whether anything really can set GID to -1.
5846 Perhaps on some system one of those ioctls can or could do so.
5847 Or perhaps this is vestigial. */
5850 #else /* ! defined (TIOCGPGRP ) */
5851 /* Can't select pgrps on this system, so we know that
5852 the child itself heads the pgrp. */
5854 #endif /* ! defined (TIOCGPGRP ) */
5856 /* If current_group is lambda, and the shell owns the terminal,
5857 don't send any signal. */
5858 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5866 p
->raw_status_new
= 0;
5868 p
->tick
= ++process_tick
;
5871 status_notify (NULL
);
5872 redisplay_preserve_echo_area (13);
5875 #endif /* ! defined (SIGCONT) */
5879 flush_pending_output (p
->infd
);
5883 /* If we don't have process groups, send the signal to the immediate
5884 subprocess. That isn't really right, but it's better than any
5885 obvious alternative. */
5888 kill (p
->pid
, signo
);
5892 /* gid may be a pid, or minus a pgrp's number */
5894 if (!NILP (current_group
))
5896 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5897 EMACS_KILLPG (gid
, signo
);
5904 #else /* ! defined (TIOCSIGSEND) */
5905 EMACS_KILLPG (gid
, signo
);
5906 #endif /* ! defined (TIOCSIGSEND) */
5909 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5910 doc
: /* Interrupt process PROCESS.
5911 PROCESS may be a process, a buffer, or the name of a process or buffer.
5912 No arg or nil means current buffer's process.
5913 Second arg CURRENT-GROUP non-nil means send signal to
5914 the current process-group of the process's controlling terminal
5915 rather than to the process's own process group.
5916 If the process is a shell, this means interrupt current subjob
5917 rather than the shell.
5919 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5920 don't send the signal. */)
5921 (Lisp_Object process
, Lisp_Object current_group
)
5923 process_send_signal (process
, SIGINT
, current_group
, 0);
5927 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5928 doc
: /* Kill process PROCESS. May be process or name of one.
5929 See function `interrupt-process' for more details on usage. */)
5930 (Lisp_Object process
, Lisp_Object current_group
)
5932 process_send_signal (process
, SIGKILL
, current_group
, 0);
5936 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5937 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5938 See function `interrupt-process' for more details on usage. */)
5939 (Lisp_Object process
, Lisp_Object current_group
)
5941 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5945 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5946 doc
: /* Stop process PROCESS. May be process or name of one.
5947 See function `interrupt-process' for more details on usage.
5948 If PROCESS is a network or serial process, inhibit handling of incoming
5950 (Lisp_Object process
, Lisp_Object current_group
)
5952 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5954 struct Lisp_Process
*p
;
5956 p
= XPROCESS (process
);
5957 if (NILP (p
->command
)
5960 FD_CLR (p
->infd
, &input_wait_mask
);
5961 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5967 error ("No SIGTSTP support");
5969 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5974 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5975 doc
: /* Continue process PROCESS. May be process or name of one.
5976 See function `interrupt-process' for more details on usage.
5977 If PROCESS is a network or serial process, resume handling of incoming
5979 (Lisp_Object process
, Lisp_Object current_group
)
5981 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5983 struct Lisp_Process
*p
;
5985 p
= XPROCESS (process
);
5986 if (EQ (p
->command
, Qt
)
5988 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5990 FD_SET (p
->infd
, &input_wait_mask
);
5991 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5993 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5994 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5995 #else /* not WINDOWSNT */
5996 tcflush (p
->infd
, TCIFLUSH
);
5997 #endif /* not WINDOWSNT */
6003 process_send_signal (process
, SIGCONT
, current_group
, 0);
6005 error ("No SIGCONT support");
6010 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6011 2, 2, "sProcess (name or number): \nnSignal code: ",
6012 doc
: /* Send PROCESS the signal with code SIGCODE.
6013 PROCESS may also be a number specifying the process id of the
6014 process to signal; in this case, the process need not be a child of
6016 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6017 (Lisp_Object process
, Lisp_Object sigcode
)
6021 if (INTEGERP (process
))
6023 pid
= XINT (process
);
6027 if (FLOATP (process
))
6029 pid
= (pid_t
) XFLOAT_DATA (process
);
6033 if (STRINGP (process
))
6036 if (tem
= Fget_process (process
), NILP (tem
))
6038 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6045 process
= get_process (process
);
6050 CHECK_PROCESS (process
);
6051 pid
= XPROCESS (process
)->pid
;
6053 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6057 #define parse_signal(NAME, VALUE) \
6058 else if (!xstrcasecmp (name, NAME)) \
6059 XSETINT (sigcode, VALUE)
6061 if (INTEGERP (sigcode
))
6067 CHECK_SYMBOL (sigcode
);
6068 name
= SSDATA (SYMBOL_NAME (sigcode
));
6070 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6076 parse_signal ("usr1", SIGUSR1
);
6079 parse_signal ("usr2", SIGUSR2
);
6082 parse_signal ("term", SIGTERM
);
6085 parse_signal ("hup", SIGHUP
);
6088 parse_signal ("int", SIGINT
);
6091 parse_signal ("quit", SIGQUIT
);
6094 parse_signal ("ill", SIGILL
);
6097 parse_signal ("abrt", SIGABRT
);
6100 parse_signal ("emt", SIGEMT
);
6103 parse_signal ("kill", SIGKILL
);
6106 parse_signal ("fpe", SIGFPE
);
6109 parse_signal ("bus", SIGBUS
);
6112 parse_signal ("segv", SIGSEGV
);
6115 parse_signal ("sys", SIGSYS
);
6118 parse_signal ("pipe", SIGPIPE
);
6121 parse_signal ("alrm", SIGALRM
);
6124 parse_signal ("urg", SIGURG
);
6127 parse_signal ("stop", SIGSTOP
);
6130 parse_signal ("tstp", SIGTSTP
);
6133 parse_signal ("cont", SIGCONT
);
6136 parse_signal ("chld", SIGCHLD
);
6139 parse_signal ("ttin", SIGTTIN
);
6142 parse_signal ("ttou", SIGTTOU
);
6145 parse_signal ("io", SIGIO
);
6148 parse_signal ("xcpu", SIGXCPU
);
6151 parse_signal ("xfsz", SIGXFSZ
);
6154 parse_signal ("vtalrm", SIGVTALRM
);
6157 parse_signal ("prof", SIGPROF
);
6160 parse_signal ("winch", SIGWINCH
);
6163 parse_signal ("info", SIGINFO
);
6166 error ("Undefined signal name %s", name
);
6171 return make_number (kill (pid
, XINT (sigcode
)));
6174 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6175 doc
: /* Make PROCESS see end-of-file in its input.
6176 EOF comes after any text already sent to it.
6177 PROCESS may be a process, a buffer, the name of a process or buffer, or
6178 nil, indicating the current buffer's process.
6179 If PROCESS is a network connection, or is a process communicating
6180 through a pipe (as opposed to a pty), then you cannot send any more
6181 text to PROCESS after you call this function.
6182 If PROCESS is a serial process, wait until all output written to the
6183 process has been transmitted to the serial port. */)
6184 (Lisp_Object process
)
6187 struct coding_system
*coding
;
6189 if (DATAGRAM_CONN_P (process
))
6192 proc
= get_process (process
);
6193 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6195 /* Make sure the process is really alive. */
6196 if (XPROCESS (proc
)->raw_status_new
)
6197 update_status (XPROCESS (proc
));
6198 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6199 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6201 if (CODING_REQUIRE_FLUSHING (coding
))
6203 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6204 send_process (proc
, "", 0, Qnil
);
6207 if (XPROCESS (proc
)->pty_flag
)
6208 send_process (proc
, "\004", 1, Qnil
);
6209 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6212 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6213 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6214 #endif /* not WINDOWSNT */
6215 /* Do nothing on Windows because writes are blocking. */
6219 int old_outfd
, new_outfd
;
6221 #ifdef HAVE_SHUTDOWN
6222 /* If this is a network connection, or socketpair is used
6223 for communication with the subprocess, call shutdown to cause EOF.
6224 (In some old system, shutdown to socketpair doesn't work.
6225 Then we just can't win.) */
6226 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6227 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6228 shutdown (XPROCESS (proc
)->outfd
, 1);
6229 /* In case of socketpair, outfd == infd, so don't close it. */
6230 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6231 emacs_close (XPROCESS (proc
)->outfd
);
6232 #else /* not HAVE_SHUTDOWN */
6233 emacs_close (XPROCESS (proc
)->outfd
);
6234 #endif /* not HAVE_SHUTDOWN */
6235 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6238 old_outfd
= XPROCESS (proc
)->outfd
;
6240 if (!proc_encode_coding_system
[new_outfd
])
6241 proc_encode_coding_system
[new_outfd
]
6242 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6243 memcpy (proc_encode_coding_system
[new_outfd
],
6244 proc_encode_coding_system
[old_outfd
],
6245 sizeof (struct coding_system
));
6246 memset (proc_encode_coding_system
[old_outfd
], 0,
6247 sizeof (struct coding_system
));
6249 XPROCESS (proc
)->outfd
= new_outfd
;
6254 /* On receipt of a signal that a child status has changed, loop asking
6255 about children with changed statuses until the system says there
6258 All we do is change the status; we do not run sentinels or print
6259 notifications. That is saved for the next time keyboard input is
6260 done, in order to avoid timing errors.
6262 ** WARNING: this can be called during garbage collection.
6263 Therefore, it must not be fooled by the presence of mark bits in
6266 ** USG WARNING: Although it is not obvious from the documentation
6267 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6268 signal() before executing at least one wait(), otherwise the
6269 handler will be called again, resulting in an infinite loop. The
6270 relevant portion of the documentation reads "SIGCLD signals will be
6271 queued and the signal-catching function will be continually
6272 reentered until the queue is empty". Invoking signal() causes the
6273 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6276 ** Malloc WARNING: This should never call malloc either directly or
6277 indirectly; if it does, that is a bug */
6281 sigchld_handler (int signo
)
6283 int old_errno
= errno
;
6285 struct Lisp_Process
*p
;
6287 SIGNAL_THREAD_CHECK (signo
);
6298 #endif /* no WUNTRACED */
6299 /* Keep trying to get a status until we get a definitive result. */
6303 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6305 while (pid
< 0 && errno
== EINTR
);
6309 /* PID == 0 means no processes found, PID == -1 means a real
6310 failure. We have done all our job, so return. */
6317 #endif /* no WNOHANG */
6319 /* Find the process that signaled us, and record its status. */
6321 /* The process can have been deleted by Fdelete_process. */
6322 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6324 Lisp_Object xpid
= XCAR (tail
);
6325 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6326 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6328 XSETCAR (tail
, Qnil
);
6329 goto sigchld_end_of_loop
;
6333 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6335 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6337 proc
= XCDR (XCAR (tail
));
6338 p
= XPROCESS (proc
);
6339 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6344 /* Look for an asynchronous process whose pid hasn't been filled
6347 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6349 proc
= XCDR (XCAR (tail
));
6350 p
= XPROCESS (proc
);
6356 /* Change the status of the process that was found. */
6359 int clear_desc_flag
= 0;
6361 p
->tick
= ++process_tick
;
6363 p
->raw_status_new
= 1;
6365 /* If process has terminated, stop waiting for its output. */
6366 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6368 clear_desc_flag
= 1;
6370 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6371 if (clear_desc_flag
)
6373 FD_CLR (p
->infd
, &input_wait_mask
);
6374 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6377 /* Tell wait_reading_process_output that it needs to wake up and
6379 if (input_available_clear_time
)
6380 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6383 /* There was no asynchronous process found for that pid: we have
6384 a synchronous process. */
6387 synch_process_alive
= 0;
6389 /* Report the status of the synchronous process. */
6391 synch_process_retcode
= WRETCODE (w
);
6392 else if (WIFSIGNALED (w
))
6393 synch_process_termsig
= WTERMSIG (w
);
6395 /* Tell wait_reading_process_output that it needs to wake up and
6397 if (input_available_clear_time
)
6398 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6401 sigchld_end_of_loop
:
6404 /* On some systems, we must return right away.
6405 If any more processes want to signal us, we will
6407 Otherwise (on systems that have WNOHANG), loop around
6408 to use up all the processes that have something to tell us. */
6409 #if (defined WINDOWSNT \
6410 || (defined USG && !defined GNU_LINUX \
6411 && !(defined HPUX && defined WNOHANG)))
6414 #endif /* USG, but not HPUX with WNOHANG */
6417 #endif /* SIGCHLD */
6421 exec_sentinel_unwind (Lisp_Object data
)
6423 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6428 exec_sentinel_error_handler (Lisp_Object error_val
)
6430 cmd_error_internal (error_val
, "error in process sentinel: ");
6432 update_echo_area ();
6433 Fsleep_for (make_number (2), Qnil
);
6438 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6440 Lisp_Object sentinel
, odeactivate
;
6441 register struct Lisp_Process
*p
= XPROCESS (proc
);
6442 int count
= SPECPDL_INDEX ();
6443 int outer_running_asynch_code
= running_asynch_code
;
6444 int waiting
= waiting_for_user_input_p
;
6446 if (inhibit_sentinels
)
6449 /* No need to gcpro these, because all we do with them later
6450 is test them for EQness, and none of them should be a string. */
6451 odeactivate
= Vdeactivate_mark
;
6453 Lisp_Object obuffer
, okeymap
;
6454 XSETBUFFER (obuffer
, current_buffer
);
6455 okeymap
= BVAR (current_buffer
, keymap
);
6458 /* There's no good reason to let sentinels change the current
6459 buffer, and many callers of accept-process-output, sit-for, and
6460 friends don't expect current-buffer to be changed from under them. */
6461 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6463 sentinel
= p
->sentinel
;
6464 if (NILP (sentinel
))
6467 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6468 assure that it gets restored no matter how the sentinel exits. */
6470 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6471 /* Inhibit quit so that random quits don't screw up a running filter. */
6472 specbind (Qinhibit_quit
, Qt
);
6473 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6475 /* In case we get recursively called,
6476 and we already saved the match data nonrecursively,
6477 save the same match data in safely recursive fashion. */
6478 if (outer_running_asynch_code
)
6481 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6482 restore_search_regs ();
6483 record_unwind_save_match_data ();
6484 Fset_match_data (tem
, Qt
);
6487 /* For speed, if a search happens within this code,
6488 save the match data in a special nonrecursive fashion. */
6489 running_asynch_code
= 1;
6491 internal_condition_case_1 (read_process_output_call
,
6493 Fcons (proc
, Fcons (reason
, Qnil
))),
6494 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6495 exec_sentinel_error_handler
);
6497 /* If we saved the match data nonrecursively, restore it now. */
6498 restore_search_regs ();
6499 running_asynch_code
= outer_running_asynch_code
;
6501 Vdeactivate_mark
= odeactivate
;
6503 /* Restore waiting_for_user_input_p as it was
6504 when we were called, in case the filter clobbered it. */
6505 waiting_for_user_input_p
= waiting
;
6508 if (! EQ (Fcurrent_buffer (), obuffer
)
6509 || ! EQ (current_buffer
->keymap
, okeymap
))
6511 /* But do it only if the caller is actually going to read events.
6512 Otherwise there's no need to make him wake up, and it could
6513 cause trouble (for example it would make sit_for return). */
6514 if (waiting_for_user_input_p
== -1)
6515 record_asynch_buffer_change ();
6517 unbind_to (count
, Qnil
);
6520 /* Report all recent events of a change in process status
6521 (either run the sentinel or output a message).
6522 This is usually done while Emacs is waiting for keyboard input
6523 but can be done at other times. */
6526 status_notify (struct Lisp_Process
*deleting_process
)
6528 register Lisp_Object proc
, buffer
;
6529 Lisp_Object tail
, msg
;
6530 struct gcpro gcpro1
, gcpro2
;
6534 /* We need to gcpro tail; if read_process_output calls a filter
6535 which deletes a process and removes the cons to which tail points
6536 from Vprocess_alist, and then causes a GC, tail is an unprotected
6540 /* Set this now, so that if new processes are created by sentinels
6541 that we run, we get called again to handle their status changes. */
6542 update_tick
= process_tick
;
6544 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6547 register struct Lisp_Process
*p
;
6549 proc
= Fcdr (XCAR (tail
));
6550 p
= XPROCESS (proc
);
6552 if (p
->tick
!= p
->update_tick
)
6554 p
->update_tick
= p
->tick
;
6556 /* If process is still active, read any output that remains. */
6557 while (! EQ (p
->filter
, Qt
)
6558 && ! EQ (p
->status
, Qconnect
)
6559 && ! EQ (p
->status
, Qlisten
)
6560 /* Network or serial process not stopped: */
6561 && ! EQ (p
->command
, Qt
)
6563 && p
!= deleting_process
6564 && read_process_output (proc
, p
->infd
) > 0);
6568 /* Get the text to use for the message. */
6569 if (p
->raw_status_new
)
6571 msg
= status_message (p
);
6573 /* If process is terminated, deactivate it or delete it. */
6575 if (CONSP (p
->status
))
6576 symbol
= XCAR (p
->status
);
6578 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6579 || EQ (symbol
, Qclosed
))
6581 if (delete_exited_processes
)
6582 remove_process (proc
);
6584 deactivate_process (proc
);
6587 /* The actions above may have further incremented p->tick.
6588 So set p->update_tick again
6589 so that an error in the sentinel will not cause
6590 this code to be run again. */
6591 p
->update_tick
= p
->tick
;
6592 /* Now output the message suitably. */
6593 if (!NILP (p
->sentinel
))
6594 exec_sentinel (proc
, msg
);
6595 /* Don't bother with a message in the buffer
6596 when a process becomes runnable. */
6597 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6600 struct buffer
*old
= current_buffer
;
6601 EMACS_INT opoint
, opoint_byte
;
6602 EMACS_INT before
, before_byte
;
6604 /* Avoid error if buffer is deleted
6605 (probably that's why the process is dead, too) */
6606 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6608 Fset_buffer (buffer
);
6611 opoint_byte
= PT_BYTE
;
6612 /* Insert new output into buffer
6613 at the current end-of-output marker,
6614 thus preserving logical ordering of input and output. */
6615 if (XMARKER (p
->mark
)->buffer
)
6616 Fgoto_char (p
->mark
);
6618 SET_PT_BOTH (ZV
, ZV_BYTE
);
6621 before_byte
= PT_BYTE
;
6623 tem
= BVAR (current_buffer
, read_only
);
6624 BVAR (current_buffer
, read_only
) = Qnil
;
6625 insert_string ("\nProcess ");
6626 Finsert (1, &p
->name
);
6627 insert_string (" ");
6629 BVAR (current_buffer
, read_only
) = tem
;
6630 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6632 if (opoint
>= before
)
6633 SET_PT_BOTH (opoint
+ (PT
- before
),
6634 opoint_byte
+ (PT_BYTE
- before_byte
));
6636 SET_PT_BOTH (opoint
, opoint_byte
);
6638 set_buffer_internal (old
);
6643 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6648 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6649 Sset_process_coding_system
, 1, 3, 0,
6650 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6651 DECODING will be used to decode subprocess output and ENCODING to
6652 encode subprocess input. */)
6653 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6655 register struct Lisp_Process
*p
;
6657 CHECK_PROCESS (process
);
6658 p
= XPROCESS (process
);
6660 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6662 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6663 Fcheck_coding_system (decoding
);
6664 Fcheck_coding_system (encoding
);
6665 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6666 p
->decode_coding_system
= decoding
;
6667 p
->encode_coding_system
= encoding
;
6668 setup_process_coding_systems (process
);
6673 DEFUN ("process-coding-system",
6674 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6675 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6676 (register Lisp_Object process
)
6678 CHECK_PROCESS (process
);
6679 return Fcons (XPROCESS (process
)->decode_coding_system
,
6680 XPROCESS (process
)->encode_coding_system
);
6683 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6684 Sset_process_filter_multibyte
, 2, 2, 0,
6685 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6686 If FLAG is non-nil, the filter is given multibyte strings.
6687 If FLAG is nil, the filter is given unibyte strings. In this case,
6688 all character code conversion except for end-of-line conversion is
6690 (Lisp_Object process
, Lisp_Object flag
)
6692 register struct Lisp_Process
*p
;
6694 CHECK_PROCESS (process
);
6695 p
= XPROCESS (process
);
6697 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6698 setup_process_coding_systems (process
);
6703 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6704 Sprocess_filter_multibyte_p
, 1, 1, 0,
6705 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6706 (Lisp_Object process
)
6708 register struct Lisp_Process
*p
;
6709 struct coding_system
*coding
;
6711 CHECK_PROCESS (process
);
6712 p
= XPROCESS (process
);
6713 coding
= proc_decode_coding_system
[p
->infd
];
6714 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6723 add_gpm_wait_descriptor (int desc
)
6725 add_keyboard_wait_descriptor (desc
);
6729 delete_gpm_wait_descriptor (int desc
)
6731 delete_keyboard_wait_descriptor (desc
);
6738 /* Return nonzero if *MASK has a bit set
6739 that corresponds to one of the keyboard input descriptors. */
6742 keyboard_bit_set (fd_set
*mask
)
6746 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6747 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6748 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6755 #else /* not subprocesses */
6757 /* Defined on msdos.c. */
6758 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6761 /* Implementation of wait_reading_process_output, assuming that there
6762 are no subprocesses. Used only by the MS-DOS build.
6764 Wait for timeout to elapse and/or keyboard input to be available.
6767 timeout in seconds, or
6768 zero for no limit, or
6769 -1 means gobble data immediately available but don't wait for any.
6771 read_kbd is a Lisp_Object:
6772 0 to ignore keyboard input, or
6773 1 to return when input is available, or
6774 -1 means caller will actually read the input, so don't throw to
6777 see full version for other parameters. We know that wait_proc will
6778 always be NULL, since `subprocesses' isn't defined.
6780 do_display != 0 means redisplay should be done to show subprocess
6781 output that arrives.
6783 Return true if we received input from any process. */
6786 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6788 Lisp_Object wait_for_cell
,
6789 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6792 EMACS_TIME end_time
, timeout
;
6793 SELECT_TYPE waitchannels
;
6796 /* What does time_limit really mean? */
6797 if (time_limit
|| microsecs
)
6799 EMACS_GET_TIME (end_time
);
6800 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6801 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6804 /* Turn off periodic alarms (in case they are in use)
6805 and then turn off any other atimers,
6806 because the select emulator uses alarms. */
6808 turn_on_atimers (0);
6812 int timeout_reduced_for_timers
= 0;
6814 /* If calling from keyboard input, do not quit
6815 since we want to return C-g as an input character.
6816 Otherwise, do pending quit if requested. */
6820 /* Exit now if the cell we're waiting for became non-nil. */
6821 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6824 /* Compute time from now till when time limit is up */
6825 /* Exit if already run out */
6826 if (time_limit
== -1)
6828 /* -1 specified for timeout means
6829 gobble output available now
6830 but don't wait at all. */
6832 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6834 else if (time_limit
|| microsecs
)
6836 EMACS_GET_TIME (timeout
);
6837 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6838 if (EMACS_TIME_NEG_P (timeout
))
6843 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6846 /* If our caller will not immediately handle keyboard events,
6847 run timer events directly.
6848 (Callers that will immediately read keyboard events
6849 call timer_delay on their own.) */
6850 if (NILP (wait_for_cell
))
6852 EMACS_TIME timer_delay
;
6856 int old_timers_run
= timers_run
;
6857 timer_delay
= timer_check ();
6858 if (timers_run
!= old_timers_run
&& do_display
)
6859 /* We must retry, since a timer may have requeued itself
6860 and that could alter the time delay. */
6861 redisplay_preserve_echo_area (14);
6865 while (!detect_input_pending ());
6867 /* If there is unread keyboard input, also return. */
6869 && requeued_events_pending_p ())
6872 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6874 EMACS_TIME difference
;
6875 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6876 if (EMACS_TIME_NEG_P (difference
))
6878 timeout
= timer_delay
;
6879 timeout_reduced_for_timers
= 1;
6884 /* Cause C-g and alarm signals to take immediate action,
6885 and cause input available signals to zero out timeout. */
6887 set_waiting_for_input (&timeout
);
6889 /* Wait till there is something to do. */
6891 if (! read_kbd
&& NILP (wait_for_cell
))
6892 FD_ZERO (&waitchannels
);
6894 FD_SET (0, &waitchannels
);
6896 /* If a frame has been newly mapped and needs updating,
6897 reprocess its display stuff. */
6898 if (frame_garbaged
&& do_display
)
6900 clear_waiting_for_input ();
6901 redisplay_preserve_echo_area (15);
6903 set_waiting_for_input (&timeout
);
6906 if (read_kbd
&& detect_input_pending ())
6909 FD_ZERO (&waitchannels
);
6912 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6917 /* Make C-g and alarm signals set flags again */
6918 clear_waiting_for_input ();
6920 /* If we woke up due to SIGWINCH, actually change size now. */
6921 do_pending_window_change (0);
6923 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6924 /* We waited the full specified time, so return now. */
6929 /* If the system call was interrupted, then go around the
6931 if (xerrno
== EINTR
)
6932 FD_ZERO (&waitchannels
);
6934 error ("select error: %s", emacs_strerror (xerrno
));
6937 /* Check for keyboard input */
6940 && detect_input_pending_run_timers (do_display
))
6942 swallow_events (do_display
);
6943 if (detect_input_pending_run_timers (do_display
))
6947 /* If there is unread keyboard input, also return. */
6949 && requeued_events_pending_p ())
6952 /* If wait_for_cell. check for keyboard input
6953 but don't run any timers.
6954 ??? (It seems wrong to me to check for keyboard
6955 input at all when wait_for_cell, but the code
6956 has been this way since July 1994.
6957 Try changing this after version 19.31.) */
6958 if (! NILP (wait_for_cell
)
6959 && detect_input_pending ())
6961 swallow_events (do_display
);
6962 if (detect_input_pending ())
6966 /* Exit now if the cell we're waiting for became non-nil. */
6967 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6976 #endif /* not subprocesses */
6978 /* The following functions are needed even if async subprocesses are
6979 not supported. Some of them are no-op stubs in that case. */
6981 /* Add DESC to the set of keyboard input descriptors. */
6984 add_keyboard_wait_descriptor (int desc
)
6986 #ifdef subprocesses /* actually means "not MSDOS" */
6987 FD_SET (desc
, &input_wait_mask
);
6988 FD_SET (desc
, &non_process_wait_mask
);
6989 if (desc
> max_input_desc
)
6990 max_input_desc
= desc
;
6994 /* From now on, do not expect DESC to give keyboard input. */
6997 delete_keyboard_wait_descriptor (int desc
)
7001 int lim
= max_input_desc
;
7003 FD_CLR (desc
, &input_wait_mask
);
7004 FD_CLR (desc
, &non_process_wait_mask
);
7006 if (desc
== max_input_desc
)
7007 for (fd
= 0; fd
< lim
; fd
++)
7008 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7009 max_input_desc
= fd
;
7013 /* Setup coding systems of PROCESS. */
7016 setup_process_coding_systems (Lisp_Object process
)
7019 struct Lisp_Process
*p
= XPROCESS (process
);
7021 int outch
= p
->outfd
;
7022 Lisp_Object coding_system
;
7024 if (inch
< 0 || outch
< 0)
7027 if (!proc_decode_coding_system
[inch
])
7028 proc_decode_coding_system
[inch
]
7029 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7030 coding_system
= p
->decode_coding_system
;
7031 if (! NILP (p
->filter
))
7033 else if (BUFFERP (p
->buffer
))
7035 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7036 coding_system
= raw_text_coding_system (coding_system
);
7038 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7040 if (!proc_encode_coding_system
[outch
])
7041 proc_encode_coding_system
[outch
]
7042 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7043 setup_coding_system (p
->encode_coding_system
,
7044 proc_encode_coding_system
[outch
]);
7048 /* Close all descriptors currently in use for communication
7049 with subprocess. This is used in a newly-forked subprocess
7050 to get rid of irrelevant descriptors. */
7053 close_process_descs (void)
7057 for (i
= 0; i
< MAXDESC
; i
++)
7059 Lisp_Object process
;
7060 process
= chan_process
[i
];
7061 if (!NILP (process
))
7063 int in
= XPROCESS (process
)->infd
;
7064 int out
= XPROCESS (process
)->outfd
;
7067 if (out
>= 0 && in
!= out
)
7074 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7075 doc
: /* Return the (or a) process associated with BUFFER.
7076 BUFFER may be a buffer or the name of one. */)
7077 (register Lisp_Object buffer
)
7080 register Lisp_Object buf
, tail
, proc
;
7082 if (NILP (buffer
)) return Qnil
;
7083 buf
= Fget_buffer (buffer
);
7084 if (NILP (buf
)) return Qnil
;
7086 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7088 proc
= Fcdr (XCAR (tail
));
7089 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7092 #endif /* subprocesses */
7096 DEFUN ("process-inherit-coding-system-flag",
7097 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7099 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7100 If this flag is t, `buffer-file-coding-system' of the buffer
7101 associated with PROCESS will inherit the coding system used to decode
7102 the process output. */)
7103 (register Lisp_Object process
)
7106 CHECK_PROCESS (process
);
7107 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7109 /* Ignore the argument and return the value of
7110 inherit-process-coding-system. */
7111 return inherit_process_coding_system
? Qt
: Qnil
;
7115 /* Kill all processes associated with `buffer'.
7116 If `buffer' is nil, kill all processes */
7119 kill_buffer_processes (Lisp_Object buffer
)
7122 Lisp_Object tail
, proc
;
7124 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7126 proc
= XCDR (XCAR (tail
));
7128 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7130 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7131 Fdelete_process (proc
);
7132 else if (XPROCESS (proc
)->infd
>= 0)
7133 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7136 #else /* subprocesses */
7137 /* Since we have no subprocesses, this does nothing. */
7138 #endif /* subprocesses */
7141 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7142 Swaiting_for_user_input_p
, 0, 0, 0,
7143 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7144 This is intended for use by asynchronous process output filters and sentinels. */)
7148 return (waiting_for_user_input_p
? Qt
: Qnil
);
7154 /* Stop reading input from keyboard sources. */
7157 hold_keyboard_input (void)
7162 /* Resume reading input from keyboard sources. */
7165 unhold_keyboard_input (void)
7170 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7173 kbd_on_hold_p (void)
7175 return kbd_is_on_hold
;
7179 /* Enumeration of and access to system processes a-la ps(1). */
7181 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7183 doc
: /* Return a list of numerical process IDs of all running processes.
7184 If this functionality is unsupported, return nil.
7186 See `process-attributes' for getting attributes of a process given its ID. */)
7189 return list_system_processes ();
7192 DEFUN ("process-attributes", Fprocess_attributes
,
7193 Sprocess_attributes
, 1, 1, 0,
7194 doc
: /* Return attributes of the process given by its PID, a number.
7196 Value is an alist where each element is a cons cell of the form
7200 If this functionality is unsupported, the value is nil.
7202 See `list-system-processes' for getting a list of all process IDs.
7204 The KEYs of the attributes that this function may return are listed
7205 below, together with the type of the associated VALUE (in parentheses).
7206 Not all platforms support all of these attributes; unsupported
7207 attributes will not appear in the returned alist.
7208 Unless explicitly indicated otherwise, numbers can have either
7209 integer or floating point values.
7211 euid -- Effective user User ID of the process (number)
7212 user -- User name corresponding to euid (string)
7213 egid -- Effective user Group ID of the process (number)
7214 group -- Group name corresponding to egid (string)
7215 comm -- Command name (executable name only) (string)
7216 state -- Process state code, such as "S", "R", or "T" (string)
7217 ppid -- Parent process ID (number)
7218 pgrp -- Process group ID (number)
7219 sess -- Session ID, i.e. process ID of session leader (number)
7220 ttname -- Controlling tty name (string)
7221 tpgid -- ID of foreground process group on the process's tty (number)
7222 minflt -- number of minor page faults (number)
7223 majflt -- number of major page faults (number)
7224 cminflt -- cumulative number of minor page faults (number)
7225 cmajflt -- cumulative number of major page faults (number)
7226 utime -- user time used by the process, in the (HIGH LOW USEC) format
7227 stime -- system time used by the process, in the (HIGH LOW USEC) format
7228 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7229 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7230 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7231 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7232 pri -- priority of the process (number)
7233 nice -- nice value of the process (number)
7234 thcount -- process thread count (number)
7235 start -- time the process started, in the (HIGH LOW USEC) format
7236 vsize -- virtual memory size of the process in KB's (number)
7237 rss -- resident set size of the process in KB's (number)
7238 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7239 pcpu -- percents of CPU time used by the process (floating-point number)
7240 pmem -- percents of total physical memory used by process's resident set
7241 (floating-point number)
7242 args -- command line which invoked the process (string). */)
7245 return system_process_attributes (pid
);
7255 inhibit_sentinels
= 0;
7259 if (! noninteractive
|| initialized
)
7261 signal (SIGCHLD
, sigchld_handler
);
7264 FD_ZERO (&input_wait_mask
);
7265 FD_ZERO (&non_keyboard_wait_mask
);
7266 FD_ZERO (&non_process_wait_mask
);
7267 FD_ZERO (&write_mask
);
7268 max_process_desc
= 0;
7269 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7271 #ifdef NON_BLOCKING_CONNECT
7272 FD_ZERO (&connect_wait_mask
);
7273 num_pending_connects
= 0;
7276 #ifdef ADAPTIVE_READ_BUFFERING
7277 process_output_delay_count
= 0;
7278 process_output_skip
= 0;
7281 /* Don't do this, it caused infinite select loops. The display
7282 method should call add_keyboard_wait_descriptor on stdin if it
7285 FD_SET (0, &input_wait_mask
);
7288 Vprocess_alist
= Qnil
;
7290 deleted_pid_list
= Qnil
;
7292 for (i
= 0; i
< MAXDESC
; i
++)
7294 chan_process
[i
] = Qnil
;
7295 proc_buffered_char
[i
] = -1;
7297 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7298 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7299 #ifdef DATAGRAM_SOCKETS
7300 memset (datagram_address
, 0, sizeof datagram_address
);
7304 Lisp_Object subfeatures
= Qnil
;
7305 const struct socket_options
*sopt
;
7307 #define ADD_SUBFEATURE(key, val) \
7308 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7310 #ifdef NON_BLOCKING_CONNECT
7311 ADD_SUBFEATURE (QCnowait
, Qt
);
7313 #ifdef DATAGRAM_SOCKETS
7314 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7316 #ifdef HAVE_SEQPACKET
7317 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7319 #ifdef HAVE_LOCAL_SOCKETS
7320 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7322 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7324 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7326 #ifdef HAVE_GETSOCKNAME
7327 ADD_SUBFEATURE (QCservice
, Qt
);
7329 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7330 ADD_SUBFEATURE (QCserver
, Qt
);
7333 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7334 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7336 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7339 #if defined (DARWIN_OS)
7340 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7341 processes. As such, we only change the default value. */
7344 char const *release
= (STRINGP (Voperating_system_release
)
7345 ? SSDATA (Voperating_system_release
)
7347 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7348 && release
[1] == '.')) {
7349 Vprocess_connection_type
= Qnil
;
7353 #endif /* subprocesses */
7358 syms_of_process (void)
7362 DEFSYM (Qprocessp
, "processp");
7363 DEFSYM (Qrun
, "run");
7364 DEFSYM (Qstop
, "stop");
7365 DEFSYM (Qsignal
, "signal");
7367 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7370 Qexit = intern_c_string ("exit");
7371 staticpro (&Qexit); */
7373 DEFSYM (Qopen
, "open");
7374 DEFSYM (Qclosed
, "closed");
7375 DEFSYM (Qconnect
, "connect");
7376 DEFSYM (Qfailed
, "failed");
7377 DEFSYM (Qlisten
, "listen");
7378 DEFSYM (Qlocal
, "local");
7379 DEFSYM (Qipv4
, "ipv4");
7381 DEFSYM (Qipv6
, "ipv6");
7383 DEFSYM (Qdatagram
, "datagram");
7384 DEFSYM (Qseqpacket
, "seqpacket");
7386 DEFSYM (QCport
, ":port");
7387 DEFSYM (QCspeed
, ":speed");
7388 DEFSYM (QCprocess
, ":process");
7390 DEFSYM (QCbytesize
, ":bytesize");
7391 DEFSYM (QCstopbits
, ":stopbits");
7392 DEFSYM (QCparity
, ":parity");
7393 DEFSYM (Qodd
, "odd");
7394 DEFSYM (Qeven
, "even");
7395 DEFSYM (QCflowcontrol
, ":flowcontrol");
7398 DEFSYM (QCsummary
, ":summary");
7400 DEFSYM (Qreal
, "real");
7401 DEFSYM (Qnetwork
, "network");
7402 DEFSYM (Qserial
, "serial");
7403 DEFSYM (QCbuffer
, ":buffer");
7404 DEFSYM (QChost
, ":host");
7405 DEFSYM (QCservice
, ":service");
7406 DEFSYM (QClocal
, ":local");
7407 DEFSYM (QCremote
, ":remote");
7408 DEFSYM (QCcoding
, ":coding");
7409 DEFSYM (QCserver
, ":server");
7410 DEFSYM (QCnowait
, ":nowait");
7411 DEFSYM (QCsentinel
, ":sentinel");
7412 DEFSYM (QClog
, ":log");
7413 DEFSYM (QCnoquery
, ":noquery");
7414 DEFSYM (QCstop
, ":stop");
7415 DEFSYM (QCoptions
, ":options");
7416 DEFSYM (QCplist
, ":plist");
7418 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7420 staticpro (&Vprocess_alist
);
7422 staticpro (&deleted_pid_list
);
7425 #endif /* subprocesses */
7427 DEFSYM (QCname
, ":name");
7428 DEFSYM (QCtype
, ":type");
7430 DEFSYM (Qeuid
, "euid");
7431 DEFSYM (Qegid
, "egid");
7432 DEFSYM (Quser
, "user");
7433 DEFSYM (Qgroup
, "group");
7434 DEFSYM (Qcomm
, "comm");
7435 DEFSYM (Qstate
, "state");
7436 DEFSYM (Qppid
, "ppid");
7437 DEFSYM (Qpgrp
, "pgrp");
7438 DEFSYM (Qsess
, "sess");
7439 DEFSYM (Qttname
, "ttname");
7440 DEFSYM (Qtpgid
, "tpgid");
7441 DEFSYM (Qminflt
, "minflt");
7442 DEFSYM (Qmajflt
, "majflt");
7443 DEFSYM (Qcminflt
, "cminflt");
7444 DEFSYM (Qcmajflt
, "cmajflt");
7445 DEFSYM (Qutime
, "utime");
7446 DEFSYM (Qstime
, "stime");
7447 DEFSYM (Qtime
, "time");
7448 DEFSYM (Qcutime
, "cutime");
7449 DEFSYM (Qcstime
, "cstime");
7450 DEFSYM (Qctime
, "ctime");
7451 DEFSYM (Qpri
, "pri");
7452 DEFSYM (Qnice
, "nice");
7453 DEFSYM (Qthcount
, "thcount");
7454 DEFSYM (Qstart
, "start");
7455 DEFSYM (Qvsize
, "vsize");
7456 DEFSYM (Qrss
, "rss");
7457 DEFSYM (Qetime
, "etime");
7458 DEFSYM (Qpcpu
, "pcpu");
7459 DEFSYM (Qpmem
, "pmem");
7460 DEFSYM (Qargs
, "args");
7462 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7463 doc
: /* *Non-nil means delete processes immediately when they exit.
7464 A value of nil means don't delete them until `list-processes' is run. */);
7466 delete_exited_processes
= 1;
7469 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7470 doc
: /* Control type of device used to communicate with subprocesses.
7471 Values are nil to use a pipe, or t or `pty' to use a pty.
7472 The value has no effect if the system has no ptys or if all ptys are busy:
7473 then a pipe is used in any case.
7474 The value takes effect when `start-process' is called. */);
7475 Vprocess_connection_type
= Qt
;
7477 #ifdef ADAPTIVE_READ_BUFFERING
7478 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7479 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7480 On some systems, when Emacs reads the output from a subprocess, the output data
7481 is read in very small blocks, potentially resulting in very poor performance.
7482 This behavior can be remedied to some extent by setting this variable to a
7483 non-nil value, as it will automatically delay reading from such processes, to
7484 allow them to produce more output before Emacs tries to read it.
7485 If the value is t, the delay is reset after each write to the process; any other
7486 non-nil value means that the delay is not reset on write.
7487 The variable takes effect when `start-process' is called. */);
7488 Vprocess_adaptive_read_buffering
= Qt
;
7491 defsubr (&Sprocessp
);
7492 defsubr (&Sget_process
);
7493 defsubr (&Sdelete_process
);
7494 defsubr (&Sprocess_status
);
7495 defsubr (&Sprocess_exit_status
);
7496 defsubr (&Sprocess_id
);
7497 defsubr (&Sprocess_name
);
7498 defsubr (&Sprocess_tty_name
);
7499 defsubr (&Sprocess_command
);
7500 defsubr (&Sset_process_buffer
);
7501 defsubr (&Sprocess_buffer
);
7502 defsubr (&Sprocess_mark
);
7503 defsubr (&Sset_process_filter
);
7504 defsubr (&Sprocess_filter
);
7505 defsubr (&Sset_process_sentinel
);
7506 defsubr (&Sprocess_sentinel
);
7507 defsubr (&Sset_process_window_size
);
7508 defsubr (&Sset_process_inherit_coding_system_flag
);
7509 defsubr (&Sset_process_query_on_exit_flag
);
7510 defsubr (&Sprocess_query_on_exit_flag
);
7511 defsubr (&Sprocess_contact
);
7512 defsubr (&Sprocess_plist
);
7513 defsubr (&Sset_process_plist
);
7514 defsubr (&Sprocess_list
);
7515 defsubr (&Sstart_process
);
7516 defsubr (&Sserial_process_configure
);
7517 defsubr (&Smake_serial_process
);
7518 defsubr (&Sset_network_process_option
);
7519 defsubr (&Smake_network_process
);
7520 defsubr (&Sformat_network_address
);
7521 #if defined (HAVE_NET_IF_H)
7523 defsubr (&Snetwork_interface_list
);
7525 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7526 defsubr (&Snetwork_interface_info
);
7528 #endif /* defined (HAVE_NET_IF_H) */
7529 #ifdef DATAGRAM_SOCKETS
7530 defsubr (&Sprocess_datagram_address
);
7531 defsubr (&Sset_process_datagram_address
);
7533 defsubr (&Saccept_process_output
);
7534 defsubr (&Sprocess_send_region
);
7535 defsubr (&Sprocess_send_string
);
7536 defsubr (&Sinterrupt_process
);
7537 defsubr (&Skill_process
);
7538 defsubr (&Squit_process
);
7539 defsubr (&Sstop_process
);
7540 defsubr (&Scontinue_process
);
7541 defsubr (&Sprocess_running_child_p
);
7542 defsubr (&Sprocess_send_eof
);
7543 defsubr (&Ssignal_process
);
7544 defsubr (&Swaiting_for_user_input_p
);
7545 defsubr (&Sprocess_type
);
7546 defsubr (&Sset_process_coding_system
);
7547 defsubr (&Sprocess_coding_system
);
7548 defsubr (&Sset_process_filter_multibyte
);
7549 defsubr (&Sprocess_filter_multibyte_p
);
7551 #endif /* subprocesses */
7553 defsubr (&Sget_buffer_process
);
7554 defsubr (&Sprocess_inherit_coding_system_flag
);
7555 defsubr (&Slist_system_processes
);
7556 defsubr (&Sprocess_attributes
);