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/>. */
24 #define PROCESS_INLINE EXTERN_INLINE
30 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
40 /* Only MS-DOS does not define `subprocesses'. */
43 #include <sys/socket.h>
45 #include <netinet/in.h>
46 #include <arpa/inet.h>
48 /* Are local (unix) sockets supported? */
49 #if defined (HAVE_SYS_UN_H)
50 #if !defined (AF_LOCAL) && defined (AF_UNIX)
51 #define AF_LOCAL AF_UNIX
54 #define HAVE_LOCAL_SOCKETS
59 #include <sys/ioctl.h>
60 #if defined (HAVE_NET_IF_H)
62 #endif /* HAVE_NET_IF_H */
64 #if defined (HAVE_IFADDRS_H)
65 /* Must be after net/if.h */
68 /* We only use structs from this header when we use getifaddrs. */
69 #if defined (HAVE_NET_IF_DL_H)
70 #include <net/if_dl.h>
80 #include <netinet/in.h>
81 #include <arpa/nameser.h>
93 #endif /* subprocesses */
99 #include "character.h"
104 #include "termhooks.h"
105 #include "termopts.h"
106 #include "commands.h"
107 #include "keyboard.h"
108 #include "blockinput.h"
109 #include "dispextern.h"
110 #include "composite.h"
112 #include "sysselect.h"
113 #include "syssignal.h"
119 #ifdef HAVE_WINDOW_SYSTEM
121 #endif /* HAVE_WINDOW_SYSTEM */
123 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
124 #include "xgselect.h"
127 /* Work around GCC 4.7.0 bug with strict overflow checking; see
128 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
129 These lines can be removed once the GCC bug is fixed. */
130 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
131 # pragma GCC diagnostic ignored "-Wstrict-overflow"
134 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
135 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
136 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
137 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
138 Lisp_Object QCname
, QCtype
;
140 /* Non-zero if keyboard input is on hold, zero otherwise. */
142 static int kbd_is_on_hold
;
144 /* Nonzero means don't run process sentinels. This is used
146 int inhibit_sentinels
;
150 Lisp_Object Qprocessp
;
151 static Lisp_Object Qrun
, Qstop
, Qsignal
;
152 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
154 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
155 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
157 static Lisp_Object Qipv6
;
159 static Lisp_Object QCport
, QCprocess
;
161 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
162 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
163 static Lisp_Object QCbuffer
, QChost
, QCservice
;
164 static Lisp_Object QClocal
, QCremote
, QCcoding
;
165 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
166 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
167 static Lisp_Object Qlast_nonmenu_event
;
168 /* QCfamily is declared and initialized in xfaces.c,
169 QCfilter in keyboard.c. */
170 extern Lisp_Object QCfamily
, QCfilter
;
172 /* Qexit is declared and initialized in eval.c. */
174 /* QCfamily is defined in xfaces.c. */
175 extern Lisp_Object QCfamily
;
176 /* QCfilter is defined in keyboard.c. */
177 extern Lisp_Object QCfilter
;
179 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
180 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
181 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
182 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
188 /* Number of events of change of status of a process. */
189 static EMACS_INT process_tick
;
190 /* Number of events for which the user or sentinel has been notified. */
191 static EMACS_INT update_tick
;
193 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
195 /* Only W32 has this, it really means that select can't take write mask. */
196 #ifdef BROKEN_NON_BLOCKING_CONNECT
197 #undef NON_BLOCKING_CONNECT
198 #define SELECT_CANT_DO_WRITE_MASK
200 #ifndef NON_BLOCKING_CONNECT
202 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
203 #if defined (O_NONBLOCK) || defined (O_NDELAY)
204 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
205 #define NON_BLOCKING_CONNECT
206 #endif /* EWOULDBLOCK || EINPROGRESS */
207 #endif /* O_NONBLOCK || O_NDELAY */
208 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
209 #endif /* HAVE_SELECT */
210 #endif /* NON_BLOCKING_CONNECT */
211 #endif /* BROKEN_NON_BLOCKING_CONNECT */
213 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
214 this system. We need to read full packets, so we need a
215 "non-destructive" select. So we require either native select,
216 or emulation of select using FIONREAD. */
218 #ifdef BROKEN_DATAGRAM_SOCKETS
219 #undef DATAGRAM_SOCKETS
221 #ifndef DATAGRAM_SOCKETS
222 #if defined (HAVE_SELECT) || defined (FIONREAD)
223 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
224 #define DATAGRAM_SOCKETS
225 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
226 #endif /* HAVE_SELECT || FIONREAD */
227 #endif /* DATAGRAM_SOCKETS */
228 #endif /* BROKEN_DATAGRAM_SOCKETS */
230 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
231 # define HAVE_SEQPACKET
234 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
235 #define ADAPTIVE_READ_BUFFERING
238 #ifdef ADAPTIVE_READ_BUFFERING
239 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
240 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
241 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
243 /* Number of processes which have a non-zero read_output_delay,
244 and therefore might be delayed for adaptive read buffering. */
246 static int process_output_delay_count
;
248 /* Non-zero if any process has non-nil read_output_skip. */
250 static int process_output_skip
;
253 #define process_output_delay_count 0
256 static void create_process (Lisp_Object
, char **, Lisp_Object
);
258 static int keyboard_bit_set (SELECT_TYPE
*);
260 static void deactivate_process (Lisp_Object
);
261 static void status_notify (struct Lisp_Process
*);
262 static int read_process_output (Lisp_Object
, int);
263 static void create_pty (Lisp_Object
);
265 /* If we support a window system, turn on the code to poll periodically
266 to detect C-g. It isn't actually used when doing interrupt input. */
267 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
268 #define POLL_FOR_INPUT
271 static Lisp_Object
get_process (register Lisp_Object name
);
272 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
274 /* Mask of bits indicating the descriptors that we wait for input on. */
276 static SELECT_TYPE input_wait_mask
;
278 /* Mask that excludes keyboard input descriptor(s). */
280 static SELECT_TYPE non_keyboard_wait_mask
;
282 /* Mask that excludes process input descriptor(s). */
284 static SELECT_TYPE non_process_wait_mask
;
286 /* Mask for selecting for write. */
288 static SELECT_TYPE write_mask
;
290 #ifdef NON_BLOCKING_CONNECT
291 /* Mask of bits indicating the descriptors that we wait for connect to
292 complete on. Once they complete, they are removed from this mask
293 and added to the input_wait_mask and non_keyboard_wait_mask. */
295 static SELECT_TYPE connect_wait_mask
;
297 /* Number of bits set in connect_wait_mask. */
298 static int num_pending_connects
;
299 #endif /* NON_BLOCKING_CONNECT */
301 /* The largest descriptor currently in use for a process object. */
302 static int max_process_desc
;
304 /* The largest descriptor currently in use for input. */
305 static int max_input_desc
;
307 /* Indexed by descriptor, gives the process (if any) for that descriptor */
308 static Lisp_Object chan_process
[MAXDESC
];
310 /* Alist of elements (NAME . PROCESS) */
311 static Lisp_Object Vprocess_alist
;
313 /* Buffered-ahead input char from process, indexed by channel.
314 -1 means empty (no char is buffered).
315 Used on sys V where the only way to tell if there is any
316 output from the process is to read at least one char.
317 Always -1 on systems that support FIONREAD. */
319 static int proc_buffered_char
[MAXDESC
];
321 /* Table of `struct coding-system' for each process. */
322 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
323 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
325 #ifdef DATAGRAM_SOCKETS
326 /* Table of `partner address' for datagram sockets. */
327 static struct sockaddr_and_len
{
330 } datagram_address
[MAXDESC
];
331 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
332 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
334 #define DATAGRAM_CHAN_P(chan) (0)
335 #define DATAGRAM_CONN_P(proc) (0)
338 /* Maximum number of bytes to send to a pty without an eof. */
339 static int pty_max_bytes
;
341 /* These setters are used only in this file, so they can be private. */
343 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
348 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
353 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
355 p
->decode_coding_system
= val
;
358 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
360 p
->decoding_buf
= val
;
363 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
365 p
->encode_coding_system
= val
;
368 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
370 p
->encoding_buf
= val
;
373 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
378 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
383 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
388 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
393 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
398 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
403 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
408 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
413 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
418 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
420 p
->write_queue
= val
;
425 static struct fd_callback_data
431 int condition
; /* mask of the defines above. */
432 } fd_callback_info
[MAXDESC
];
435 /* Add a file descriptor FD to be monitored for when read is possible.
436 When read is possible, call FUNC with argument DATA. */
439 add_read_fd (int fd
, fd_callback func
, void *data
)
441 eassert (fd
< MAXDESC
);
442 add_keyboard_wait_descriptor (fd
);
444 fd_callback_info
[fd
].func
= func
;
445 fd_callback_info
[fd
].data
= data
;
446 fd_callback_info
[fd
].condition
|= FOR_READ
;
449 /* Stop monitoring file descriptor FD for when read is possible. */
452 delete_read_fd (int fd
)
454 eassert (fd
< MAXDESC
);
455 delete_keyboard_wait_descriptor (fd
);
457 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
458 if (fd_callback_info
[fd
].condition
== 0)
460 fd_callback_info
[fd
].func
= 0;
461 fd_callback_info
[fd
].data
= 0;
465 /* Add a file descriptor FD to be monitored for when write is possible.
466 When write is possible, call FUNC with argument DATA. */
469 add_write_fd (int fd
, fd_callback func
, void *data
)
471 eassert (fd
< MAXDESC
);
472 FD_SET (fd
, &write_mask
);
473 if (fd
> max_input_desc
)
476 fd_callback_info
[fd
].func
= func
;
477 fd_callback_info
[fd
].data
= data
;
478 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
481 /* Stop monitoring file descriptor FD for when write is possible. */
484 delete_write_fd (int fd
)
486 int lim
= max_input_desc
;
488 eassert (fd
< MAXDESC
);
489 FD_CLR (fd
, &write_mask
);
490 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
491 if (fd_callback_info
[fd
].condition
== 0)
493 fd_callback_info
[fd
].func
= 0;
494 fd_callback_info
[fd
].data
= 0;
496 if (fd
== max_input_desc
)
497 for (fd
= lim
; fd
>= 0; fd
--)
498 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
508 /* Compute the Lisp form of the process status, p->status, from
509 the numeric status that was returned by `wait'. */
511 static Lisp_Object
status_convert (int);
514 update_status (struct Lisp_Process
*p
)
516 eassert (p
->raw_status_new
);
517 pset_status (p
, status_convert (p
->raw_status
));
518 p
->raw_status_new
= 0;
521 /* Convert a process status word in Unix format to
522 the list that we use internally. */
525 status_convert (int w
)
528 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
529 else if (WIFEXITED (w
))
530 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
531 WCOREDUMP (w
) ? Qt
: Qnil
));
532 else if (WIFSIGNALED (w
))
533 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
534 WCOREDUMP (w
) ? Qt
: Qnil
));
539 /* Given a status-list, extract the three pieces of information
540 and store them individually through the three pointers. */
543 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
557 *code
= XFASTINT (XCAR (tem
));
559 *coredump
= !NILP (tem
);
563 /* Return a string describing a process status list. */
566 status_message (struct Lisp_Process
*p
)
568 Lisp_Object status
= p
->status
;
571 Lisp_Object string
, string2
;
573 decode_status (status
, &symbol
, &code
, &coredump
);
575 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
578 synchronize_system_messages_locale ();
579 signame
= strsignal (code
);
581 string
= build_string ("unknown");
586 string
= build_unibyte_string (signame
);
587 if (! NILP (Vlocale_coding_system
))
588 string
= (code_convert_string_norecord
589 (string
, Vlocale_coding_system
, 0));
590 c1
= STRING_CHAR (SDATA (string
));
593 Faset (string
, make_number (0), make_number (c2
));
595 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
596 return concat2 (string
, string2
);
598 else if (EQ (symbol
, Qexit
))
601 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
603 return build_string ("finished\n");
604 string
= Fnumber_to_string (make_number (code
));
605 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
606 return concat3 (build_string ("exited abnormally with code "),
609 else if (EQ (symbol
, Qfailed
))
611 string
= Fnumber_to_string (make_number (code
));
612 string2
= build_string ("\n");
613 return concat3 (build_string ("failed with code "),
617 return Fcopy_sequence (Fsymbol_name (symbol
));
622 /* The file name of the pty opened by allocate_pty. */
623 static char pty_name
[24];
625 /* Open an available pty, returning a file descriptor.
626 Return -1 on failure.
627 The file name of the terminal corresponding to the pty
628 is left in the variable pty_name. */
639 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
640 for (i
= 0; i
< 16; i
++)
643 #ifdef PTY_NAME_SPRINTF
646 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
647 #endif /* no PTY_NAME_SPRINTF */
651 #else /* no PTY_OPEN */
653 { /* Some systems name their pseudoterminals so that there are gaps in
654 the usual sequence - for example, on HP9000/S700 systems, there
655 are no pseudoterminals with names ending in 'f'. So we wait for
656 three failures in a row before deciding that we've reached the
658 int failed_count
= 0;
661 if (stat (pty_name
, &stb
) < 0)
664 if (failed_count
>= 3)
671 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
673 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
676 #endif /* no PTY_OPEN */
680 /* check to make certain that both sides are available
681 this avoids a nasty yet stupid bug in rlogins */
682 #ifdef PTY_TTY_NAME_SPRINTF
685 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
686 #endif /* no PTY_TTY_NAME_SPRINTF */
687 if (access (pty_name
, 6) != 0)
702 #endif /* HAVE_PTYS */
705 make_process (Lisp_Object name
)
707 register Lisp_Object val
, tem
, name1
;
708 register struct Lisp_Process
*p
;
709 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
712 p
= allocate_process ();
713 /* Initialize Lisp data. Note that allocate_process initializes all
714 Lisp data to nil, so do it only for slots which should not be nil. */
715 pset_status (p
, Qrun
);
716 pset_mark (p
, Fmake_marker ());
718 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
719 non-Lisp data, so do it only for slots which should not be zero. */
724 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
727 /* If name is already in use, modify it until it is unused. */
732 tem
= Fget_process (name1
);
733 if (NILP (tem
)) break;
734 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
738 XSETPROCESS (val
, p
);
739 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
744 remove_process (register Lisp_Object proc
)
746 register Lisp_Object pair
;
748 pair
= Frassq (proc
, Vprocess_alist
);
749 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
751 deactivate_process (proc
);
755 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
756 doc
: /* Return t if OBJECT is a process. */)
759 return PROCESSP (object
) ? Qt
: Qnil
;
762 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
763 doc
: /* Return the process named NAME, or nil if there is none. */)
764 (register Lisp_Object name
)
769 return Fcdr (Fassoc (name
, Vprocess_alist
));
772 /* This is how commands for the user decode process arguments. It
773 accepts a process, a process name, a buffer, a buffer name, or nil.
774 Buffers denote the first process in the buffer, and nil denotes the
778 get_process (register Lisp_Object name
)
780 register Lisp_Object proc
, obj
;
783 obj
= Fget_process (name
);
785 obj
= Fget_buffer (name
);
787 error ("Process %s does not exist", SDATA (name
));
789 else if (NILP (name
))
790 obj
= Fcurrent_buffer ();
794 /* Now obj should be either a buffer object or a process object.
798 proc
= Fget_buffer_process (obj
);
800 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
812 /* Fdelete_process promises to immediately forget about the process, but in
813 reality, Emacs needs to remember those processes until they have been
814 treated by sigchld_handler; otherwise this handler would consider the
815 process as being synchronous and say that the synchronous process is
817 static Lisp_Object deleted_pid_list
;
820 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
821 doc
: /* Delete PROCESS: kill it and forget about it immediately.
822 PROCESS may be a process, a buffer, the name of a process or buffer, or
823 nil, indicating the current buffer's process. */)
824 (register Lisp_Object process
)
826 register struct Lisp_Process
*p
;
828 process
= get_process (process
);
829 p
= XPROCESS (process
);
831 p
->raw_status_new
= 0;
832 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
834 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
835 p
->tick
= ++process_tick
;
837 redisplay_preserve_echo_area (13);
839 else if (p
->infd
>= 0)
845 /* No problem storing the pid here, as it is still in Vprocess_alist. */
846 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
847 /* GC treated elements set to nil. */
848 Fdelq (Qnil
, deleted_pid_list
));
849 /* If the process has already signaled, remove it from the list. */
850 if (p
->raw_status_new
)
853 if (CONSP (p
->status
))
854 symbol
= XCAR (p
->status
);
855 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
857 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
861 Fkill_process (process
, Qnil
);
862 /* Do this now, since remove_process will make sigchld_handler do nothing. */
863 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
864 p
->tick
= ++process_tick
;
866 redisplay_preserve_echo_area (13);
869 remove_process (process
);
873 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
874 doc
: /* Return the status of PROCESS.
875 The returned value is one of the following symbols:
876 run -- for a process that is running.
877 stop -- for a process stopped but continuable.
878 exit -- for a process that has exited.
879 signal -- for a process that has got a fatal signal.
880 open -- for a network stream connection that is open.
881 listen -- for a network stream server that is listening.
882 closed -- for a network stream connection that is closed.
883 connect -- when waiting for a non-blocking connection to complete.
884 failed -- when a non-blocking connection has failed.
885 nil -- if arg is a process name and no such process exists.
886 PROCESS may be a process, a buffer, the name of a process, or
887 nil, indicating the current buffer's process. */)
888 (register Lisp_Object process
)
890 register struct Lisp_Process
*p
;
891 register Lisp_Object status
;
893 if (STRINGP (process
))
894 process
= Fget_process (process
);
896 process
= get_process (process
);
901 p
= XPROCESS (process
);
902 if (p
->raw_status_new
)
906 status
= XCAR (status
);
907 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
909 if (EQ (status
, Qexit
))
911 else if (EQ (p
->command
, Qt
))
913 else if (EQ (status
, Qrun
))
919 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
921 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
922 If PROCESS has not yet exited or died, return 0. */)
923 (register Lisp_Object process
)
925 CHECK_PROCESS (process
);
926 if (XPROCESS (process
)->raw_status_new
)
927 update_status (XPROCESS (process
));
928 if (CONSP (XPROCESS (process
)->status
))
929 return XCAR (XCDR (XPROCESS (process
)->status
));
930 return make_number (0);
933 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
934 doc
: /* Return the process id of PROCESS.
935 This is the pid of the external process which PROCESS uses or talks to.
936 For a network connection, this value is nil. */)
937 (register Lisp_Object process
)
941 CHECK_PROCESS (process
);
942 pid
= XPROCESS (process
)->pid
;
943 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
946 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
947 doc
: /* Return the name of PROCESS, as a string.
948 This is the name of the program invoked in PROCESS,
949 possibly modified to make it unique among process names. */)
950 (register Lisp_Object process
)
952 CHECK_PROCESS (process
);
953 return XPROCESS (process
)->name
;
956 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
957 doc
: /* Return the command that was executed to start PROCESS.
958 This is a list of strings, the first string being the program executed
959 and the rest of the strings being the arguments given to it.
960 For a network or serial process, this is nil (process is running) or t
961 \(process is stopped). */)
962 (register Lisp_Object process
)
964 CHECK_PROCESS (process
);
965 return XPROCESS (process
)->command
;
968 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
969 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
970 This is the terminal that the process itself reads and writes on,
971 not the name of the pty that Emacs uses to talk with that terminal. */)
972 (register Lisp_Object process
)
974 CHECK_PROCESS (process
);
975 return XPROCESS (process
)->tty_name
;
978 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
980 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
982 (register Lisp_Object process
, Lisp_Object buffer
)
984 struct Lisp_Process
*p
;
986 CHECK_PROCESS (process
);
988 CHECK_BUFFER (buffer
);
989 p
= XPROCESS (process
);
990 pset_buffer (p
, buffer
);
991 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
992 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
993 setup_process_coding_systems (process
);
997 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
999 doc
: /* Return the buffer PROCESS is associated with.
1000 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
1001 (register Lisp_Object process
)
1003 CHECK_PROCESS (process
);
1004 return XPROCESS (process
)->buffer
;
1007 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
1009 doc
: /* Return the marker for the end of the last output from PROCESS. */)
1010 (register Lisp_Object process
)
1012 CHECK_PROCESS (process
);
1013 return XPROCESS (process
)->mark
;
1016 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1018 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1019 A value of t means stop accepting output from the process.
1021 When a process has a filter, its buffer is not used for output.
1022 Instead, each time it does output, the entire string of output is
1023 passed to the filter.
1025 The filter gets two arguments: the process and the string of output.
1026 The string argument is normally a multibyte string, except:
1027 - if the process' input coding system is no-conversion or raw-text,
1028 it is a unibyte string (the non-converted input), or else
1029 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1030 string (the result of converting the decoded input multibyte
1031 string to unibyte with `string-make-unibyte'). */)
1032 (register Lisp_Object process
, Lisp_Object filter
)
1034 struct Lisp_Process
*p
;
1036 CHECK_PROCESS (process
);
1037 p
= XPROCESS (process
);
1039 /* Don't signal an error if the process' input file descriptor
1040 is closed. This could make debugging Lisp more difficult,
1041 for example when doing something like
1043 (setq process (start-process ...))
1045 (set-process-filter process ...) */
1049 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1051 FD_CLR (p
->infd
, &input_wait_mask
);
1052 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1054 else if (EQ (p
->filter
, Qt
)
1055 /* Network or serial process not stopped: */
1056 && !EQ (p
->command
, Qt
))
1058 FD_SET (p
->infd
, &input_wait_mask
);
1059 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1063 pset_filter (p
, filter
);
1064 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1065 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1066 setup_process_coding_systems (process
);
1070 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1072 doc
: /* Returns the filter function of PROCESS; nil if none.
1073 See `set-process-filter' for more info on filter functions. */)
1074 (register Lisp_Object process
)
1076 CHECK_PROCESS (process
);
1077 return XPROCESS (process
)->filter
;
1080 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1082 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1083 The sentinel is called as a function when the process changes state.
1084 It gets two arguments: the process, and a string describing the change. */)
1085 (register Lisp_Object process
, Lisp_Object sentinel
)
1087 struct Lisp_Process
*p
;
1089 CHECK_PROCESS (process
);
1090 p
= XPROCESS (process
);
1092 pset_sentinel (p
, sentinel
);
1093 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1094 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1098 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1100 doc
: /* Return the sentinel of PROCESS; nil if none.
1101 See `set-process-sentinel' for more info on sentinels. */)
1102 (register Lisp_Object process
)
1104 CHECK_PROCESS (process
);
1105 return XPROCESS (process
)->sentinel
;
1108 DEFUN ("set-process-window-size", Fset_process_window_size
,
1109 Sset_process_window_size
, 3, 3, 0,
1110 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1111 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1113 CHECK_PROCESS (process
);
1114 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1115 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1117 if (XPROCESS (process
)->infd
< 0
1118 || set_window_size (XPROCESS (process
)->infd
,
1119 XINT (height
), XINT (width
)) <= 0)
1125 DEFUN ("set-process-inherit-coding-system-flag",
1126 Fset_process_inherit_coding_system_flag
,
1127 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1128 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1129 If the second argument FLAG is non-nil, then the variable
1130 `buffer-file-coding-system' of the buffer associated with PROCESS
1131 will be bound to the value of the coding system used to decode
1134 This is useful when the coding system specified for the process buffer
1135 leaves either the character code conversion or the end-of-line conversion
1136 unspecified, or if the coding system used to decode the process output
1137 is more appropriate for saving the process buffer.
1139 Binding the variable `inherit-process-coding-system' to non-nil before
1140 starting the process is an alternative way of setting the inherit flag
1141 for the process which will run.
1143 This function returns FLAG. */)
1144 (register Lisp_Object process
, Lisp_Object flag
)
1146 CHECK_PROCESS (process
);
1147 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1151 DEFUN ("set-process-query-on-exit-flag",
1152 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1154 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1155 If the second argument FLAG is non-nil, Emacs will query the user before
1156 exiting or killing a buffer if PROCESS is running. This function
1158 (register Lisp_Object process
, Lisp_Object flag
)
1160 CHECK_PROCESS (process
);
1161 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1165 DEFUN ("process-query-on-exit-flag",
1166 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1168 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1169 (register Lisp_Object process
)
1171 CHECK_PROCESS (process
);
1172 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1175 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1177 doc
: /* Return the contact info of PROCESS; t for a real child.
1178 For a network or serial connection, the value depends on the optional
1179 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1180 SERVICE) for a network connection or (PORT SPEED) for a serial
1181 connection. If KEY is t, the complete contact information for the
1182 connection is returned, else the specific value for the keyword KEY is
1183 returned. See `make-network-process' or `make-serial-process' for a
1184 list of keywords. */)
1185 (register Lisp_Object process
, Lisp_Object key
)
1187 Lisp_Object contact
;
1189 CHECK_PROCESS (process
);
1190 contact
= XPROCESS (process
)->childp
;
1192 #ifdef DATAGRAM_SOCKETS
1193 if (DATAGRAM_CONN_P (process
)
1194 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1195 contact
= Fplist_put (contact
, QCremote
,
1196 Fprocess_datagram_address (process
));
1199 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1201 if (NILP (key
) && NETCONN_P (process
))
1202 return Fcons (Fplist_get (contact
, QChost
),
1203 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1204 if (NILP (key
) && SERIALCONN_P (process
))
1205 return Fcons (Fplist_get (contact
, QCport
),
1206 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1207 return Fplist_get (contact
, key
);
1210 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1212 doc
: /* Return the plist of PROCESS. */)
1213 (register Lisp_Object process
)
1215 CHECK_PROCESS (process
);
1216 return XPROCESS (process
)->plist
;
1219 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1221 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1222 (register Lisp_Object process
, Lisp_Object plist
)
1224 CHECK_PROCESS (process
);
1227 pset_plist (XPROCESS (process
), plist
);
1231 #if 0 /* Turned off because we don't currently record this info
1232 in the process. Perhaps add it. */
1233 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1234 doc
: /* Return the connection type of PROCESS.
1235 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1236 a socket connection. */)
1237 (Lisp_Object process
)
1239 return XPROCESS (process
)->type
;
1243 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1244 doc
: /* Return the connection type of PROCESS.
1245 The value is either the symbol `real', `network', or `serial'.
1246 PROCESS may be a process, a buffer, the name of a process or buffer, or
1247 nil, indicating the current buffer's process. */)
1248 (Lisp_Object process
)
1251 proc
= get_process (process
);
1252 return XPROCESS (proc
)->type
;
1255 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1257 doc
: /* Convert network ADDRESS from internal format to a string.
1258 A 4 or 5 element vector represents an IPv4 address (with port number).
1259 An 8 or 9 element vector represents an IPv6 address (with port number).
1260 If optional second argument OMIT-PORT is non-nil, don't include a port
1261 number in the string, even when present in ADDRESS.
1262 Returns nil if format of ADDRESS is invalid. */)
1263 (Lisp_Object address
, Lisp_Object omit_port
)
1268 if (STRINGP (address
)) /* AF_LOCAL */
1271 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1273 register struct Lisp_Vector
*p
= XVECTOR (address
);
1274 ptrdiff_t size
= p
->header
.size
;
1275 Lisp_Object args
[10];
1278 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1280 args
[0] = build_string ("%d.%d.%d.%d");
1285 args
[0] = build_string ("%d.%d.%d.%d:%d");
1288 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1290 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1295 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1301 for (i
= 0; i
< nargs
; i
++)
1303 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1306 if (nargs
<= 5 /* IPv4 */
1307 && i
< 4 /* host, not port */
1308 && XINT (p
->contents
[i
]) > 255)
1311 args
[i
+1] = p
->contents
[i
];
1314 return Fformat (nargs
+1, args
);
1317 if (CONSP (address
))
1319 Lisp_Object args
[2];
1320 args
[0] = build_string ("<Family %d>");
1321 args
[1] = Fcar (address
);
1322 return Fformat (2, args
);
1328 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1329 doc
: /* Return a list of all processes. */)
1332 return Fmapcar (Qcdr
, Vprocess_alist
);
1335 /* Starting asynchronous inferior processes. */
1337 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1339 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1340 doc
: /* Start a program in a subprocess. Return the process object for it.
1341 NAME is name for process. It is modified if necessary to make it unique.
1342 BUFFER is the buffer (or buffer name) to associate with the process.
1344 Process output (both standard output and standard error streams) goes
1345 at end of BUFFER, unless you specify an output stream or filter
1346 function to handle the output. BUFFER may also be nil, meaning that
1347 this process is not associated with any buffer.
1349 PROGRAM is the program file name. It is searched for in `exec-path'
1350 (which see). If nil, just associate a pty with the buffer. Remaining
1351 arguments are strings to give program as arguments.
1353 If you want to separate standard output from standard error, invoke
1354 the command through a shell and redirect one of them using the shell
1357 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1358 (ptrdiff_t nargs
, Lisp_Object
*args
)
1360 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1361 register unsigned char **new_argv
;
1363 ptrdiff_t count
= SPECPDL_INDEX ();
1367 buffer
= Fget_buffer_create (buffer
);
1369 /* Make sure that the child will be able to chdir to the current
1370 buffer's current directory, or its unhandled equivalent. We
1371 can't just have the child check for an error when it does the
1372 chdir, since it's in a vfork.
1374 We have to GCPRO around this because Fexpand_file_name and
1375 Funhandled_file_name_directory might call a file name handling
1376 function. The argument list is protected by the caller, so all
1377 we really have to worry about is buffer. */
1379 struct gcpro gcpro1
, gcpro2
;
1381 current_dir
= BVAR (current_buffer
, directory
);
1383 GCPRO2 (buffer
, current_dir
);
1385 current_dir
= Funhandled_file_name_directory (current_dir
);
1386 if (NILP (current_dir
))
1387 /* If the file name handler says that current_dir is unreachable, use
1388 a sensible default. */
1389 current_dir
= build_string ("~/");
1390 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1391 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1392 report_file_error ("Setting current directory",
1393 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1399 CHECK_STRING (name
);
1403 if (!NILP (program
))
1404 CHECK_STRING (program
);
1406 proc
= make_process (name
);
1407 /* If an error occurs and we can't start the process, we want to
1408 remove it from the process list. This means that each error
1409 check in create_process doesn't need to call remove_process
1410 itself; it's all taken care of here. */
1411 record_unwind_protect (start_process_unwind
, proc
);
1413 pset_childp (XPROCESS (proc
), Qt
);
1414 pset_plist (XPROCESS (proc
), Qnil
);
1415 pset_type (XPROCESS (proc
), Qreal
);
1416 pset_buffer (XPROCESS (proc
), buffer
);
1417 pset_sentinel (XPROCESS (proc
), Qnil
);
1418 pset_filter (XPROCESS (proc
), Qnil
);
1419 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1422 /* AKA GNUTLS_INITSTAGE(proc). */
1423 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1424 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1427 #ifdef ADAPTIVE_READ_BUFFERING
1428 XPROCESS (proc
)->adaptive_read_buffering
1429 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1430 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1433 /* Make the process marker point into the process buffer (if any). */
1434 if (BUFFERP (buffer
))
1435 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1436 BUF_ZV (XBUFFER (buffer
)),
1437 BUF_ZV_BYTE (XBUFFER (buffer
)));
1440 /* Decide coding systems for communicating with the process. Here
1441 we don't setup the structure coding_system nor pay attention to
1442 unibyte mode. They are done in create_process. */
1444 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1445 Lisp_Object coding_systems
= Qt
;
1446 Lisp_Object val
, *args2
;
1447 struct gcpro gcpro1
, gcpro2
;
1449 val
= Vcoding_system_for_read
;
1452 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1453 args2
[0] = Qstart_process
;
1454 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1455 GCPRO2 (proc
, current_dir
);
1456 if (!NILP (program
))
1457 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1459 if (CONSP (coding_systems
))
1460 val
= XCAR (coding_systems
);
1461 else if (CONSP (Vdefault_process_coding_system
))
1462 val
= XCAR (Vdefault_process_coding_system
);
1464 pset_decode_coding_system (XPROCESS (proc
), val
);
1466 val
= Vcoding_system_for_write
;
1469 if (EQ (coding_systems
, Qt
))
1471 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1472 args2
[0] = Qstart_process
;
1473 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1474 GCPRO2 (proc
, current_dir
);
1475 if (!NILP (program
))
1476 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1479 if (CONSP (coding_systems
))
1480 val
= XCDR (coding_systems
);
1481 else if (CONSP (Vdefault_process_coding_system
))
1482 val
= XCDR (Vdefault_process_coding_system
);
1484 pset_encode_coding_system (XPROCESS (proc
), val
);
1485 /* Note: At this moment, the above coding system may leave
1486 text-conversion or eol-conversion unspecified. They will be
1487 decided after we read output from the process and decode it by
1488 some coding system, or just before we actually send a text to
1493 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1494 XPROCESS (proc
)->decoding_carryover
= 0;
1495 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1497 XPROCESS (proc
)->inherit_coding_system_flag
1498 = !(NILP (buffer
) || !inherit_process_coding_system
);
1500 if (!NILP (program
))
1502 /* If program file name is not absolute, search our path for it.
1503 Put the name we will really use in TEM. */
1504 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1505 && !(SCHARS (program
) > 1
1506 && IS_DEVICE_SEP (SREF (program
, 1))))
1508 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1511 GCPRO4 (name
, program
, buffer
, current_dir
);
1512 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1515 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1516 tem
= Fexpand_file_name (tem
, Qnil
);
1520 if (!NILP (Ffile_directory_p (program
)))
1521 error ("Specified program for new process is a directory");
1525 /* If program file name starts with /: for quoting a magic name,
1527 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1528 && SREF (tem
, 1) == ':')
1529 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1532 Lisp_Object arg_encoding
= Qnil
;
1533 struct gcpro gcpro1
;
1536 /* Encode the file name and put it in NEW_ARGV.
1537 That's where the child will use it to execute the program. */
1538 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1540 /* Here we encode arguments by the coding system used for sending
1541 data to the process. We don't support using different coding
1542 systems for encoding arguments and for encoding data sent to the
1545 for (i
= 3; i
< nargs
; i
++)
1547 tem
= Fcons (args
[i
], tem
);
1548 CHECK_STRING (XCAR (tem
));
1549 if (STRING_MULTIBYTE (XCAR (tem
)))
1551 if (NILP (arg_encoding
))
1552 arg_encoding
= (complement_process_encoding_system
1553 (XPROCESS (proc
)->encode_coding_system
));
1555 code_convert_string_norecord
1556 (XCAR (tem
), arg_encoding
, 1));
1563 /* Now that everything is encoded we can collect the strings into
1565 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1566 new_argv
[nargs
- 2] = 0;
1568 for (i
= nargs
- 2; i
-- != 0; )
1570 new_argv
[i
] = SDATA (XCAR (tem
));
1574 create_process (proc
, (char **) new_argv
, current_dir
);
1579 return unbind_to (count
, proc
);
1582 /* This function is the unwind_protect form for Fstart_process. If
1583 PROC doesn't have its pid set, then we know someone has signaled
1584 an error and the process wasn't started successfully, so we should
1585 remove it from the process list. */
1587 start_process_unwind (Lisp_Object proc
)
1589 if (!PROCESSP (proc
))
1592 /* Was PROC started successfully?
1593 -2 is used for a pty with no process, eg for gdb. */
1594 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1595 remove_process (proc
);
1601 create_process_1 (struct atimer
*timer
)
1603 /* Nothing to do. */
1608 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1610 int inchannel
, outchannel
;
1613 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1614 int wait_child_setup
[2];
1618 struct sigaction sigint_action
;
1619 struct sigaction sigquit_action
;
1620 struct sigaction sigpipe_action
;
1622 struct sigaction sighup_action
;
1624 /* Use volatile to protect variables from being clobbered by longjmp. */
1625 volatile int forkin
, forkout
;
1626 volatile int pty_flag
= 0;
1628 inchannel
= outchannel
= -1;
1631 if (!NILP (Vprocess_connection_type
))
1632 outchannel
= inchannel
= allocate_pty ();
1636 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1637 /* On most USG systems it does not work to open the pty's tty here,
1638 then close it and reopen it in the child. */
1640 /* Don't let this terminal become our controlling terminal
1641 (in case we don't have one). */
1642 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1644 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1647 report_file_error ("Opening pty", Qnil
);
1649 forkin
= forkout
= -1;
1650 #endif /* not USG, or USG_SUBTTY_WORKS */
1654 #endif /* HAVE_PTYS */
1659 report_file_error ("Creating pipe", Qnil
);
1665 emacs_close (inchannel
);
1666 emacs_close (forkout
);
1667 report_file_error ("Creating pipe", Qnil
);
1673 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1677 tem
= pipe (wait_child_setup
);
1679 report_file_error ("Creating pipe", Qnil
);
1680 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1682 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1685 emacs_close (wait_child_setup
[0]);
1686 emacs_close (wait_child_setup
[1]);
1687 report_file_error ("Setting file descriptor flags", Qnil
);
1693 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1694 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1697 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1698 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1702 /* Record this as an active process, with its channels.
1703 As a result, child_setup will close Emacs's side of the pipes. */
1704 chan_process
[inchannel
] = process
;
1705 XPROCESS (process
)->infd
= inchannel
;
1706 XPROCESS (process
)->outfd
= outchannel
;
1708 /* Previously we recorded the tty descriptor used in the subprocess.
1709 It was only used for getting the foreground tty process, so now
1710 we just reopen the device (see emacs_get_tty_pgrp) as this is
1711 more portable (see USG_SUBTTY_WORKS above). */
1713 XPROCESS (process
)->pty_flag
= pty_flag
;
1714 pset_status (XPROCESS (process
), Qrun
);
1716 /* Delay interrupts until we have a chance to store
1717 the new fork's pid in its process structure */
1718 sigemptyset (&blocked
);
1720 sigaddset (&blocked
, SIGCHLD
);
1722 #ifdef HAVE_WORKING_VFORK
1723 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1724 this sets the parent's signal handlers as well as the child's.
1725 So delay all interrupts whose handlers the child might munge,
1726 and record the current handlers so they can be restored later. */
1727 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1728 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1729 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1731 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1733 #endif /* HAVE_WORKING_VFORK */
1734 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1736 FD_SET (inchannel
, &input_wait_mask
);
1737 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1738 if (inchannel
> max_process_desc
)
1739 max_process_desc
= inchannel
;
1741 /* Until we store the proper pid, enable sigchld_handler
1742 to recognize an unknown pid as standing for this process.
1743 It is very important not to let this `marker' value stay
1744 in the table after this function has returned; if it does
1745 it might cause call-process to hang and subsequent asynchronous
1746 processes to get their return values scrambled. */
1747 XPROCESS (process
)->pid
= -1;
1749 /* This must be called after the above line because it may signal an
1751 setup_process_coding_systems (process
);
1756 /* child_setup must clobber environ on systems with true vfork.
1757 Protect it from permanent change. */
1758 char **save_environ
= environ
;
1759 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1764 #endif /* not WINDOWSNT */
1766 int xforkin
= forkin
;
1767 int xforkout
= forkout
;
1769 #if 0 /* This was probably a mistake--it duplicates code later on,
1770 but fails to handle all the cases. */
1771 /* Make sure SIGCHLD is not blocked in the child. */
1772 sigsetmask (SIGEMPTYMASK
);
1775 /* Make the pty be the controlling terminal of the process. */
1777 /* First, disconnect its current controlling terminal. */
1779 /* We tried doing setsid only if pty_flag, but it caused
1780 process_set_signal to fail on SGI when using a pipe. */
1782 /* Make the pty's terminal the controlling terminal. */
1783 if (pty_flag
&& xforkin
>= 0)
1786 /* We ignore the return value
1787 because faith@cs.unc.edu says that is necessary on Linux. */
1788 ioctl (xforkin
, TIOCSCTTY
, 0);
1791 #else /* not HAVE_SETSID */
1793 /* It's very important to call setpgrp here and no time
1794 afterwards. Otherwise, we lose our controlling tty which
1795 is set when we open the pty. */
1798 #endif /* not HAVE_SETSID */
1799 #if defined (LDISC1)
1800 if (pty_flag
&& xforkin
>= 0)
1803 tcgetattr (xforkin
, &t
);
1805 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1806 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1809 #if defined (NTTYDISC) && defined (TIOCSETD)
1810 if (pty_flag
&& xforkin
>= 0)
1812 /* Use new line discipline. */
1813 int ldisc
= NTTYDISC
;
1814 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1819 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1820 can do TIOCSPGRP only to the process's controlling tty. */
1823 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1824 I can't test it since I don't have 4.3. */
1825 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1828 ioctl (j
, TIOCNOTTY
, 0);
1832 /* In order to get a controlling terminal on some versions
1833 of BSD, it is necessary to put the process in pgrp 0
1834 before it opens the terminal. */
1842 #endif /* TIOCNOTTY */
1844 #if !defined (DONT_REOPEN_PTY)
1845 /*** There is a suggestion that this ought to be a
1846 conditional on TIOCSPGRP,
1847 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1848 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1849 that system does seem to need this code, even though
1850 both HAVE_SETSID and TIOCSCTTY are defined. */
1851 /* Now close the pty (if we had it open) and reopen it.
1852 This makes the pty the controlling terminal of the subprocess. */
1856 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1859 emacs_close (xforkin
);
1860 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1864 emacs_write (1, "Couldn't open the pty terminal ", 31);
1865 emacs_write (1, pty_name
, strlen (pty_name
));
1866 emacs_write (1, "\n", 1);
1871 #endif /* not DONT_REOPEN_PTY */
1873 #ifdef SETUP_SLAVE_PTY
1878 #endif /* SETUP_SLAVE_PTY */
1880 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1881 Now reenable it in the child, so it will die when we want it to. */
1883 signal (SIGHUP
, SIG_DFL
);
1885 #endif /* HAVE_PTYS */
1887 signal (SIGINT
, SIG_DFL
);
1888 signal (SIGQUIT
, SIG_DFL
);
1889 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1891 signal (SIGPIPE
, SIG_DFL
);
1893 /* Stop blocking signals in the child. */
1894 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1897 child_setup_tty (xforkout
);
1899 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1900 new_argv
, 1, encoded_current_dir
);
1901 #else /* not WINDOWSNT */
1903 emacs_close (wait_child_setup
[0]);
1905 child_setup (xforkin
, xforkout
, xforkout
,
1906 new_argv
, 1, encoded_current_dir
);
1907 #endif /* not WINDOWSNT */
1909 environ
= save_environ
;
1914 /* This runs in the Emacs process. */
1918 emacs_close (forkin
);
1919 if (forkin
!= forkout
&& forkout
>= 0)
1920 emacs_close (forkout
);
1924 /* vfork succeeded. */
1925 XPROCESS (process
)->pid
= pid
;
1928 register_child (pid
, inchannel
);
1929 #endif /* WINDOWSNT */
1931 /* If the subfork execv fails, and it exits,
1932 this close hangs. I don't know why.
1933 So have an interrupt jar it loose. */
1935 struct atimer
*timer
;
1936 EMACS_TIME offset
= make_emacs_time (1, 0);
1939 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1942 emacs_close (forkin
);
1944 cancel_atimer (timer
);
1948 if (forkin
!= forkout
&& forkout
>= 0)
1949 emacs_close (forkout
);
1953 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
1956 pset_tty_name (XPROCESS (process
), Qnil
);
1958 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1959 /* Wait for child_setup to complete in case that vfork is
1960 actually defined as fork. The descriptor wait_child_setup[1]
1961 of a pipe is closed at the child side either by close-on-exec
1962 on successful execvp or the _exit call in child_setup. */
1966 emacs_close (wait_child_setup
[1]);
1967 emacs_read (wait_child_setup
[0], &dummy
, 1);
1968 emacs_close (wait_child_setup
[0]);
1973 /* Restore the signal state whether vfork succeeded or not.
1974 (We will signal an error, below, if it failed.) */
1975 #ifdef HAVE_WORKING_VFORK
1976 /* Restore the parent's signal handlers. */
1977 sigaction (SIGINT
, &sigint_action
, 0);
1978 sigaction (SIGQUIT
, &sigquit_action
, 0);
1979 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1981 sigaction (SIGHUP
, &sighup_action
, 0);
1983 #endif /* HAVE_WORKING_VFORK */
1984 /* Stop blocking signals in the parent. */
1985 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1987 /* Now generate the error if vfork failed. */
1989 report_file_error ("Doing vfork", Qnil
);
1993 create_pty (Lisp_Object process
)
1995 int inchannel
, outchannel
;
1998 inchannel
= outchannel
= -1;
2001 if (!NILP (Vprocess_connection_type
))
2002 outchannel
= inchannel
= allocate_pty ();
2006 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
2007 /* On most USG systems it does not work to open the pty's tty here,
2008 then close it and reopen it in the child. */
2010 /* Don't let this terminal become our controlling terminal
2011 (in case we don't have one). */
2012 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2014 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
2017 report_file_error ("Opening pty", Qnil
);
2018 #if defined (DONT_REOPEN_PTY)
2019 /* In the case that vfork is defined as fork, the parent process
2020 (Emacs) may send some data before the child process completes
2021 tty options setup. So we setup tty before forking. */
2022 child_setup_tty (forkout
);
2023 #endif /* DONT_REOPEN_PTY */
2024 #endif /* not USG, or USG_SUBTTY_WORKS */
2027 #endif /* HAVE_PTYS */
2030 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2031 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2034 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2035 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2039 /* Record this as an active process, with its channels.
2040 As a result, child_setup will close Emacs's side of the pipes. */
2041 chan_process
[inchannel
] = process
;
2042 XPROCESS (process
)->infd
= inchannel
;
2043 XPROCESS (process
)->outfd
= outchannel
;
2045 /* Previously we recorded the tty descriptor used in the subprocess.
2046 It was only used for getting the foreground tty process, so now
2047 we just reopen the device (see emacs_get_tty_pgrp) as this is
2048 more portable (see USG_SUBTTY_WORKS above). */
2050 XPROCESS (process
)->pty_flag
= pty_flag
;
2051 pset_status (XPROCESS (process
), Qrun
);
2052 setup_process_coding_systems (process
);
2054 FD_SET (inchannel
, &input_wait_mask
);
2055 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2056 if (inchannel
> max_process_desc
)
2057 max_process_desc
= inchannel
;
2059 XPROCESS (process
)->pid
= -2;
2062 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2065 pset_tty_name (XPROCESS (process
), Qnil
);
2069 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2070 The address family of sa is not included in the result. */
2073 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2075 Lisp_Object address
;
2078 register struct Lisp_Vector
*p
;
2080 /* Workaround for a bug in getsockname on BSD: Names bound to
2081 sockets in the UNIX domain are inaccessible; getsockname returns
2082 a zero length name. */
2083 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2084 return empty_unibyte_string
;
2086 switch (sa
->sa_family
)
2090 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2091 len
= sizeof (sin
->sin_addr
) + 1;
2092 address
= Fmake_vector (make_number (len
), Qnil
);
2093 p
= XVECTOR (address
);
2094 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2095 cp
= (unsigned char *) &sin
->sin_addr
;
2101 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2102 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2103 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2104 address
= Fmake_vector (make_number (len
), Qnil
);
2105 p
= XVECTOR (address
);
2106 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2107 for (i
= 0; i
< len
; i
++)
2108 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2112 #ifdef HAVE_LOCAL_SOCKETS
2115 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2116 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2117 if (sockun
->sun_path
[i
] == 0)
2119 return make_unibyte_string (sockun
->sun_path
, i
);
2123 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2124 address
= Fcons (make_number (sa
->sa_family
),
2125 Fmake_vector (make_number (len
), Qnil
));
2126 p
= XVECTOR (XCDR (address
));
2127 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2133 p
->contents
[i
++] = make_number (*cp
++);
2139 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2142 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2144 register struct Lisp_Vector
*p
;
2146 if (VECTORP (address
))
2148 p
= XVECTOR (address
);
2149 if (p
->header
.size
== 5)
2152 return sizeof (struct sockaddr_in
);
2155 else if (p
->header
.size
== 9)
2157 *familyp
= AF_INET6
;
2158 return sizeof (struct sockaddr_in6
);
2162 #ifdef HAVE_LOCAL_SOCKETS
2163 else if (STRINGP (address
))
2165 *familyp
= AF_LOCAL
;
2166 return sizeof (struct sockaddr_un
);
2169 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2170 && VECTORP (XCDR (address
)))
2172 struct sockaddr
*sa
;
2173 *familyp
= XINT (XCAR (address
));
2174 p
= XVECTOR (XCDR (address
));
2175 return p
->header
.size
+ sizeof (sa
->sa_family
);
2180 /* Convert an address object (vector or string) to an internal sockaddr.
2182 The address format has been basically validated by
2183 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2184 it could have come from user data. So if FAMILY is not valid,
2185 we return after zeroing *SA. */
2188 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2190 register struct Lisp_Vector
*p
;
2191 register unsigned char *cp
= NULL
;
2195 memset (sa
, 0, len
);
2197 if (VECTORP (address
))
2199 p
= XVECTOR (address
);
2200 if (family
== AF_INET
)
2202 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2203 len
= sizeof (sin
->sin_addr
) + 1;
2204 hostport
= XINT (p
->contents
[--len
]);
2205 sin
->sin_port
= htons (hostport
);
2206 cp
= (unsigned char *)&sin
->sin_addr
;
2207 sa
->sa_family
= family
;
2210 else if (family
== AF_INET6
)
2212 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2213 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2214 len
= sizeof (sin6
->sin6_addr
) + 1;
2215 hostport
= XINT (p
->contents
[--len
]);
2216 sin6
->sin6_port
= htons (hostport
);
2217 for (i
= 0; i
< len
; i
++)
2218 if (INTEGERP (p
->contents
[i
]))
2220 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2223 sa
->sa_family
= family
;
2230 else if (STRINGP (address
))
2232 #ifdef HAVE_LOCAL_SOCKETS
2233 if (family
== AF_LOCAL
)
2235 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2236 cp
= SDATA (address
);
2237 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2238 sockun
->sun_path
[i
] = *cp
++;
2239 sa
->sa_family
= family
;
2246 p
= XVECTOR (XCDR (address
));
2247 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2250 for (i
= 0; i
< len
; i
++)
2251 if (INTEGERP (p
->contents
[i
]))
2252 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2255 #ifdef DATAGRAM_SOCKETS
2256 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2258 doc
: /* Get the current datagram address associated with PROCESS. */)
2259 (Lisp_Object process
)
2263 CHECK_PROCESS (process
);
2265 if (!DATAGRAM_CONN_P (process
))
2268 channel
= XPROCESS (process
)->infd
;
2269 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2270 datagram_address
[channel
].len
);
2273 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2275 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2276 Returns nil upon error setting address, ADDRESS otherwise. */)
2277 (Lisp_Object process
, Lisp_Object address
)
2282 CHECK_PROCESS (process
);
2284 if (!DATAGRAM_CONN_P (process
))
2287 channel
= XPROCESS (process
)->infd
;
2289 len
= get_lisp_to_sockaddr_size (address
, &family
);
2290 if (datagram_address
[channel
].len
!= len
)
2292 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2298 static const struct socket_options
{
2299 /* The name of this option. Should be lowercase version of option
2300 name without SO_ prefix. */
2302 /* Option level SOL_... */
2304 /* Option number SO_... */
2306 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2307 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2308 } socket_options
[] =
2310 #ifdef SO_BINDTODEVICE
2311 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2314 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2317 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2320 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2323 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2326 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2329 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2332 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2334 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2337 /* Set option OPT to value VAL on socket S.
2339 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2340 Signals an error if setting a known option fails.
2344 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2347 const struct socket_options
*sopt
;
2352 name
= SSDATA (SYMBOL_NAME (opt
));
2353 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2354 if (strcmp (name
, sopt
->name
) == 0)
2357 switch (sopt
->opttype
)
2362 optval
= NILP (val
) ? 0 : 1;
2363 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2364 &optval
, sizeof (optval
));
2371 if (TYPE_RANGED_INTEGERP (int, val
))
2372 optval
= XINT (val
);
2374 error ("Bad option value for %s", name
);
2375 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2376 &optval
, sizeof (optval
));
2380 #ifdef SO_BINDTODEVICE
2383 char devname
[IFNAMSIZ
+1];
2385 /* This is broken, at least in the Linux 2.4 kernel.
2386 To unbind, the arg must be a zero integer, not the empty string.
2387 This should work on all systems. KFS. 2003-09-23. */
2388 memset (devname
, 0, sizeof devname
);
2391 char *arg
= SSDATA (val
);
2392 int len
= min (strlen (arg
), IFNAMSIZ
);
2393 memcpy (devname
, arg
, len
);
2395 else if (!NILP (val
))
2396 error ("Bad option value for %s", name
);
2397 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2406 struct linger linger
;
2409 linger
.l_linger
= 0;
2410 if (TYPE_RANGED_INTEGERP (int, val
))
2411 linger
.l_linger
= XINT (val
);
2413 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2414 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2415 &linger
, sizeof (linger
));
2425 report_file_error ("Cannot set network option",
2426 Fcons (opt
, Fcons (val
, Qnil
)));
2427 return (1 << sopt
->optbit
);
2431 DEFUN ("set-network-process-option",
2432 Fset_network_process_option
, Sset_network_process_option
,
2434 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2435 See `make-network-process' for a list of options and values.
2436 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2437 OPTION is not a supported option, return nil instead; otherwise return t. */)
2438 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2441 struct Lisp_Process
*p
;
2443 CHECK_PROCESS (process
);
2444 p
= XPROCESS (process
);
2445 if (!NETCONN1_P (p
))
2446 error ("Process is not a network process");
2450 error ("Process is not running");
2452 if (set_socket_option (s
, option
, value
))
2454 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2458 if (NILP (no_error
))
2459 error ("Unknown or unsupported option");
2465 DEFUN ("serial-process-configure",
2466 Fserial_process_configure
,
2467 Sserial_process_configure
,
2469 doc
: /* Configure speed, bytesize, etc. of a serial process.
2471 Arguments are specified as keyword/argument pairs. Attributes that
2472 are not given are re-initialized from the process's current
2473 configuration (available via the function `process-contact') or set to
2474 reasonable default values. The following arguments are defined:
2480 -- Any of these arguments can be given to identify the process that is
2481 to be configured. If none of these arguments is given, the current
2482 buffer's process is used.
2484 :speed SPEED -- SPEED is the speed of the serial port in bits per
2485 second, also called baud rate. Any value can be given for SPEED, but
2486 most serial ports work only at a few defined values between 1200 and
2487 115200, with 9600 being the most common value. If SPEED is nil, the
2488 serial port is not configured any further, i.e., all other arguments
2489 are ignored. This may be useful for special serial ports such as
2490 Bluetooth-to-serial converters which can only be configured through AT
2491 commands. A value of nil for SPEED can be used only when passed
2492 through `make-serial-process' or `serial-term'.
2494 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2495 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2497 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2498 `odd' (use odd parity), or the symbol `even' (use even parity). If
2499 PARITY is not given, no parity is used.
2501 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2502 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2503 is not given or nil, 1 stopbit is used.
2505 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2506 flowcontrol to be used, which is either nil (don't use flowcontrol),
2507 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2508 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2509 flowcontrol is used.
2511 `serial-process-configure' is called by `make-serial-process' for the
2512 initial configuration of the serial port.
2516 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2518 \(serial-process-configure
2519 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2521 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2523 usage: (serial-process-configure &rest ARGS) */)
2524 (ptrdiff_t nargs
, Lisp_Object
*args
)
2526 struct Lisp_Process
*p
;
2527 Lisp_Object contact
= Qnil
;
2528 Lisp_Object proc
= Qnil
;
2529 struct gcpro gcpro1
;
2531 contact
= Flist (nargs
, args
);
2534 proc
= Fplist_get (contact
, QCprocess
);
2536 proc
= Fplist_get (contact
, QCname
);
2538 proc
= Fplist_get (contact
, QCbuffer
);
2540 proc
= Fplist_get (contact
, QCport
);
2541 proc
= get_process (proc
);
2542 p
= XPROCESS (proc
);
2543 if (!EQ (p
->type
, Qserial
))
2544 error ("Not a serial process");
2546 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2552 serial_configure (p
, contact
);
2558 /* Used by make-serial-process to recover from errors. */
2560 make_serial_process_unwind (Lisp_Object proc
)
2562 if (!PROCESSP (proc
))
2564 remove_process (proc
);
2568 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2570 doc
: /* Create and return a serial port process.
2572 In Emacs, serial port connections are represented by process objects,
2573 so input and output work as for subprocesses, and `delete-process'
2574 closes a serial port connection. However, a serial process has no
2575 process id, it cannot be signaled, and the status codes are different
2576 from normal processes.
2578 `make-serial-process' creates a process and a buffer, on which you
2579 probably want to use `process-send-string'. Try \\[serial-term] for
2580 an interactive terminal. See below for examples.
2582 Arguments are specified as keyword/argument pairs. The following
2583 arguments are defined:
2585 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2586 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2587 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2588 the backslashes in strings).
2590 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2591 which this function calls.
2593 :name NAME -- NAME is the name of the process. If NAME is not given,
2594 the value of PORT is used.
2596 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2597 with the process. Process output goes at the end of that buffer,
2598 unless you specify an output stream or filter function to handle the
2599 output. If BUFFER is not given, the value of NAME is used.
2601 :coding CODING -- If CODING is a symbol, it specifies the coding
2602 system used for both reading and writing for this process. If CODING
2603 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2604 ENCODING is used for writing.
2606 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2607 the process is running. If BOOL is not given, query before exiting.
2609 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2610 In the stopped state, a serial process does not accept incoming data,
2611 but you can send outgoing data. The stopped state is cleared by
2612 `continue-process' and set by `stop-process'.
2614 :filter FILTER -- Install FILTER as the process filter.
2616 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2618 :plist PLIST -- Install PLIST as the initial plist of the process.
2624 -- This function calls `serial-process-configure' to handle these
2627 The original argument list, possibly modified by later configuration,
2628 is available via the function `process-contact'.
2632 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2634 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2636 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2638 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2640 usage: (make-serial-process &rest ARGS) */)
2641 (ptrdiff_t nargs
, Lisp_Object
*args
)
2644 Lisp_Object proc
, contact
, port
;
2645 struct Lisp_Process
*p
;
2646 struct gcpro gcpro1
;
2647 Lisp_Object name
, buffer
;
2648 Lisp_Object tem
, val
;
2649 ptrdiff_t specpdl_count
= -1;
2654 contact
= Flist (nargs
, args
);
2657 port
= Fplist_get (contact
, QCport
);
2659 error ("No port specified");
2660 CHECK_STRING (port
);
2662 if (NILP (Fplist_member (contact
, QCspeed
)))
2663 error (":speed not specified");
2664 if (!NILP (Fplist_get (contact
, QCspeed
)))
2665 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2667 name
= Fplist_get (contact
, QCname
);
2670 CHECK_STRING (name
);
2671 proc
= make_process (name
);
2672 specpdl_count
= SPECPDL_INDEX ();
2673 record_unwind_protect (make_serial_process_unwind
, proc
);
2674 p
= XPROCESS (proc
);
2676 fd
= serial_open (SSDATA (port
));
2679 if (fd
> max_process_desc
)
2680 max_process_desc
= fd
;
2681 chan_process
[fd
] = proc
;
2683 buffer
= Fplist_get (contact
, QCbuffer
);
2686 buffer
= Fget_buffer_create (buffer
);
2687 pset_buffer (p
, buffer
);
2689 pset_childp (p
, contact
);
2690 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2691 pset_type (p
, Qserial
);
2692 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2693 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2695 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2696 p
->kill_without_query
= 1;
2697 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2698 pset_command (p
, Qt
);
2701 if (!EQ (p
->command
, Qt
))
2703 FD_SET (fd
, &input_wait_mask
);
2704 FD_SET (fd
, &non_keyboard_wait_mask
);
2707 if (BUFFERP (buffer
))
2709 set_marker_both (p
->mark
, buffer
,
2710 BUF_ZV (XBUFFER (buffer
)),
2711 BUF_ZV_BYTE (XBUFFER (buffer
)));
2714 tem
= Fplist_member (contact
, QCcoding
);
2715 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2721 val
= XCAR (XCDR (tem
));
2725 else if (!NILP (Vcoding_system_for_read
))
2726 val
= Vcoding_system_for_read
;
2727 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2728 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2730 pset_decode_coding_system (p
, val
);
2735 val
= XCAR (XCDR (tem
));
2739 else if (!NILP (Vcoding_system_for_write
))
2740 val
= Vcoding_system_for_write
;
2741 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2742 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2744 pset_encode_coding_system (p
, val
);
2746 setup_process_coding_systems (proc
);
2747 pset_decoding_buf (p
, empty_unibyte_string
);
2748 p
->decoding_carryover
= 0;
2749 pset_encoding_buf (p
, empty_unibyte_string
);
2750 p
->inherit_coding_system_flag
2751 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2753 Fserial_process_configure (nargs
, args
);
2755 specpdl_ptr
= specpdl
+ specpdl_count
;
2761 /* Create a network stream/datagram client/server process. Treated
2762 exactly like a normal process when reading and writing. Primary
2763 differences are in status display and process deletion. A network
2764 connection has no PID; you cannot signal it. All you can do is
2765 stop/continue it and deactivate/close it via delete-process */
2767 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2769 doc
: /* Create and return a network server or client process.
2771 In Emacs, network connections are represented by process objects, so
2772 input and output work as for subprocesses and `delete-process' closes
2773 a network connection. However, a network process has no process id,
2774 it cannot be signaled, and the status codes are different from normal
2777 Arguments are specified as keyword/argument pairs. The following
2778 arguments are defined:
2780 :name NAME -- NAME is name for process. It is modified if necessary
2783 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2784 with the process. Process output goes at end of that buffer, unless
2785 you specify an output stream or filter function to handle the output.
2786 BUFFER may be also nil, meaning that this process is not associated
2789 :host HOST -- HOST is name of the host to connect to, or its IP
2790 address. The symbol `local' specifies the local host. If specified
2791 for a server process, it must be a valid name or address for the local
2792 host, and only clients connecting to that address will be accepted.
2794 :service SERVICE -- SERVICE is name of the service desired, or an
2795 integer specifying a port number to connect to. If SERVICE is t,
2796 a random port number is selected for the server. (If Emacs was
2797 compiled with getaddrinfo, a port number can also be specified as a
2798 string, e.g. "80", as well as an integer. This is not portable.)
2800 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2801 stream type connection, `datagram' creates a datagram type connection,
2802 `seqpacket' creates a reliable datagram connection.
2804 :family FAMILY -- FAMILY is the address (and protocol) family for the
2805 service specified by HOST and SERVICE. The default (nil) is to use
2806 whatever address family (IPv4 or IPv6) that is defined for the host
2807 and port number specified by HOST and SERVICE. Other address families
2809 local -- for a local (i.e. UNIX) address specified by SERVICE.
2810 ipv4 -- use IPv4 address family only.
2811 ipv6 -- use IPv6 address family only.
2813 :local ADDRESS -- ADDRESS is the local address used for the connection.
2814 This parameter is ignored when opening a client process. When specified
2815 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2817 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2818 connection. This parameter is ignored when opening a stream server
2819 process. For a datagram server process, it specifies the initial
2820 setting of the remote datagram address. When specified for a client
2821 process, the FAMILY, HOST, and SERVICE args are ignored.
2823 The format of ADDRESS depends on the address family:
2824 - An IPv4 address is represented as an vector of integers [A B C D P]
2825 corresponding to numeric IP address A.B.C.D and port number P.
2826 - A local address is represented as a string with the address in the
2827 local address space.
2828 - An "unsupported family" address is represented by a cons (F . AV)
2829 where F is the family number and AV is a vector containing the socket
2830 address data with one element per address data byte. Do not rely on
2831 this format in portable code, as it may depend on implementation
2832 defined constants, data sizes, and data structure alignment.
2834 :coding CODING -- If CODING is a symbol, it specifies the coding
2835 system used for both reading and writing for this process. If CODING
2836 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2837 ENCODING is used for writing.
2839 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2840 return without waiting for the connection to complete; instead, the
2841 sentinel function will be called with second arg matching "open" (if
2842 successful) or "failed" when the connect completes. Default is to use
2843 a blocking connect (i.e. wait) for stream type connections.
2845 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2846 running when Emacs is exited.
2848 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2849 In the stopped state, a server process does not accept new
2850 connections, and a client process does not handle incoming traffic.
2851 The stopped state is cleared by `continue-process' and set by
2854 :filter FILTER -- Install FILTER as the process filter.
2856 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2857 process filter are multibyte, otherwise they are unibyte.
2858 If this keyword is not specified, the strings are multibyte if
2859 the default value of `enable-multibyte-characters' is non-nil.
2861 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2863 :log LOG -- Install LOG as the server process log function. This
2864 function is called when the server accepts a network connection from a
2865 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2866 is the server process, CLIENT is the new process for the connection,
2867 and MESSAGE is a string.
2869 :plist PLIST -- Install PLIST as the new process' initial plist.
2871 :server QLEN -- if QLEN is non-nil, create a server process for the
2872 specified FAMILY, SERVICE, and connection type (stream or datagram).
2873 If QLEN is an integer, it is used as the max. length of the server's
2874 pending connection queue (also known as the backlog); the default
2875 queue length is 5. Default is to create a client process.
2877 The following network options can be specified for this connection:
2879 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2880 :dontroute BOOL -- Only send to directly connected hosts.
2881 :keepalive BOOL -- Send keep-alive messages on network stream.
2882 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2883 :oobinline BOOL -- Place out-of-band data in receive data stream.
2884 :priority INT -- Set protocol defined priority for sent packets.
2885 :reuseaddr BOOL -- Allow reusing a recently used local address
2886 (this is allowed by default for a server process).
2887 :bindtodevice NAME -- bind to interface NAME. Using this may require
2888 special privileges on some systems.
2890 Consult the relevant system programmer's manual pages for more
2891 information on using these options.
2894 A server process will listen for and accept connections from clients.
2895 When a client connection is accepted, a new network process is created
2896 for the connection with the following parameters:
2898 - The client's process name is constructed by concatenating the server
2899 process' NAME and a client identification string.
2900 - If the FILTER argument is non-nil, the client process will not get a
2901 separate process buffer; otherwise, the client's process buffer is a newly
2902 created buffer named after the server process' BUFFER name or process
2903 NAME concatenated with the client identification string.
2904 - The connection type and the process filter and sentinel parameters are
2905 inherited from the server process' TYPE, FILTER and SENTINEL.
2906 - The client process' contact info is set according to the client's
2907 addressing information (typically an IP address and a port number).
2908 - The client process' plist is initialized from the server's plist.
2910 Notice that the FILTER and SENTINEL args are never used directly by
2911 the server process. Also, the BUFFER argument is not used directly by
2912 the server process, but via the optional :log function, accepted (and
2913 failed) connections may be logged in the server process' buffer.
2915 The original argument list, modified with the actual connection
2916 information, is available via the `process-contact' function.
2918 usage: (make-network-process &rest ARGS) */)
2919 (ptrdiff_t nargs
, Lisp_Object
*args
)
2922 Lisp_Object contact
;
2923 struct Lisp_Process
*p
;
2924 #ifdef HAVE_GETADDRINFO
2925 struct addrinfo ai
, *res
, *lres
;
2926 struct addrinfo hints
;
2927 const char *portstring
;
2929 #else /* HAVE_GETADDRINFO */
2930 struct _emacs_addrinfo
2936 struct sockaddr
*ai_addr
;
2937 struct _emacs_addrinfo
*ai_next
;
2939 #endif /* HAVE_GETADDRINFO */
2940 struct sockaddr_in address_in
;
2941 #ifdef HAVE_LOCAL_SOCKETS
2942 struct sockaddr_un address_un
;
2947 int s
= -1, outch
, inch
;
2948 struct gcpro gcpro1
;
2949 ptrdiff_t count
= SPECPDL_INDEX ();
2951 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2953 Lisp_Object name
, buffer
, host
, service
, address
;
2954 Lisp_Object filter
, sentinel
;
2955 int is_non_blocking_client
= 0;
2956 int is_server
= 0, backlog
= 5;
2963 /* Save arguments for process-contact and clone-process. */
2964 contact
= Flist (nargs
, args
);
2968 /* Ensure socket support is loaded if available. */
2969 init_winsock (TRUE
);
2972 /* :type TYPE (nil: stream, datagram */
2973 tem
= Fplist_get (contact
, QCtype
);
2975 socktype
= SOCK_STREAM
;
2976 #ifdef DATAGRAM_SOCKETS
2977 else if (EQ (tem
, Qdatagram
))
2978 socktype
= SOCK_DGRAM
;
2980 #ifdef HAVE_SEQPACKET
2981 else if (EQ (tem
, Qseqpacket
))
2982 socktype
= SOCK_SEQPACKET
;
2985 error ("Unsupported connection type");
2988 tem
= Fplist_get (contact
, QCserver
);
2991 /* Don't support network sockets when non-blocking mode is
2992 not available, since a blocked Emacs is not useful. */
2993 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2994 error ("Network servers not supported");
2997 if (TYPE_RANGED_INTEGERP (int, tem
))
2998 backlog
= XINT (tem
);
3002 /* Make QCaddress an alias for :local (server) or :remote (client). */
3003 QCaddress
= is_server
? QClocal
: QCremote
;
3006 if (!is_server
&& socktype
!= SOCK_DGRAM
3007 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
3009 #ifndef NON_BLOCKING_CONNECT
3010 error ("Non-blocking connect not supported");
3012 is_non_blocking_client
= 1;
3016 name
= Fplist_get (contact
, QCname
);
3017 buffer
= Fplist_get (contact
, QCbuffer
);
3018 filter
= Fplist_get (contact
, QCfilter
);
3019 sentinel
= Fplist_get (contact
, QCsentinel
);
3021 CHECK_STRING (name
);
3023 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3024 ai
.ai_socktype
= socktype
;
3029 /* :local ADDRESS or :remote ADDRESS */
3030 address
= Fplist_get (contact
, QCaddress
);
3031 if (!NILP (address
))
3033 host
= service
= Qnil
;
3035 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3036 error ("Malformed :address");
3037 ai
.ai_family
= family
;
3038 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3039 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3043 /* :family FAMILY -- nil (for Inet), local, or integer. */
3044 tem
= Fplist_get (contact
, QCfamily
);
3047 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3053 #ifdef HAVE_LOCAL_SOCKETS
3054 else if (EQ (tem
, Qlocal
))
3058 else if (EQ (tem
, Qipv6
))
3061 else if (EQ (tem
, Qipv4
))
3063 else if (TYPE_RANGED_INTEGERP (int, tem
))
3064 family
= XINT (tem
);
3066 error ("Unknown address family");
3068 ai
.ai_family
= family
;
3070 /* :service SERVICE -- string, integer (port number), or t (random port). */
3071 service
= Fplist_get (contact
, QCservice
);
3073 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3074 host
= Fplist_get (contact
, QChost
);
3077 if (EQ (host
, Qlocal
))
3078 /* Depending on setup, "localhost" may map to different IPv4 and/or
3079 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3080 host
= build_string ("127.0.0.1");
3081 CHECK_STRING (host
);
3084 #ifdef HAVE_LOCAL_SOCKETS
3085 if (family
== AF_LOCAL
)
3089 message (":family local ignores the :host \"%s\" property",
3091 contact
= Fplist_put (contact
, QChost
, Qnil
);
3094 CHECK_STRING (service
);
3095 memset (&address_un
, 0, sizeof address_un
);
3096 address_un
.sun_family
= AF_LOCAL
;
3097 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3098 error ("Service name too long");
3099 strcpy (address_un
.sun_path
, SSDATA (service
));
3100 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3101 ai
.ai_addrlen
= sizeof address_un
;
3106 /* Slow down polling to every ten seconds.
3107 Some kernels have a bug which causes retrying connect to fail
3108 after a connect. Polling can interfere with gethostbyname too. */
3109 #ifdef POLL_FOR_INPUT
3110 if (socktype
!= SOCK_DGRAM
)
3112 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3113 bind_polling_period (10);
3117 #ifdef HAVE_GETADDRINFO
3118 /* If we have a host, use getaddrinfo to resolve both host and service.
3119 Otherwise, use getservbyname to lookup the service. */
3123 /* SERVICE can either be a string or int.
3124 Convert to a C string for later use by getaddrinfo. */
3125 if (EQ (service
, Qt
))
3127 else if (INTEGERP (service
))
3129 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3130 portstring
= portbuf
;
3134 CHECK_STRING (service
);
3135 portstring
= SSDATA (service
);
3140 memset (&hints
, 0, sizeof (hints
));
3142 hints
.ai_family
= family
;
3143 hints
.ai_socktype
= socktype
;
3144 hints
.ai_protocol
= 0;
3146 #ifdef HAVE_RES_INIT
3150 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3152 #ifdef HAVE_GAI_STRERROR
3153 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3155 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3161 #endif /* HAVE_GETADDRINFO */
3163 /* We end up here if getaddrinfo is not defined, or in case no hostname
3164 has been specified (e.g. for a local server process). */
3166 if (EQ (service
, Qt
))
3168 else if (INTEGERP (service
))
3169 port
= htons ((unsigned short) XINT (service
));
3172 struct servent
*svc_info
;
3173 CHECK_STRING (service
);
3174 svc_info
= getservbyname (SSDATA (service
),
3175 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3177 error ("Unknown service: %s", SDATA (service
));
3178 port
= svc_info
->s_port
;
3181 memset (&address_in
, 0, sizeof address_in
);
3182 address_in
.sin_family
= family
;
3183 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3184 address_in
.sin_port
= port
;
3186 #ifndef HAVE_GETADDRINFO
3189 struct hostent
*host_info_ptr
;
3191 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3192 as it may `hang' Emacs for a very long time. */
3196 #ifdef HAVE_RES_INIT
3200 host_info_ptr
= gethostbyname (SDATA (host
));
3205 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3206 host_info_ptr
->h_length
);
3207 family
= host_info_ptr
->h_addrtype
;
3208 address_in
.sin_family
= family
;
3211 /* Attempt to interpret host as numeric inet address */
3213 unsigned long numeric_addr
;
3214 numeric_addr
= inet_addr (SSDATA (host
));
3215 if (numeric_addr
== -1)
3216 error ("Unknown host \"%s\"", SDATA (host
));
3218 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3219 sizeof (address_in
.sin_addr
));
3223 #endif /* not HAVE_GETADDRINFO */
3225 ai
.ai_family
= family
;
3226 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3227 ai
.ai_addrlen
= sizeof address_in
;
3231 /* Do this in case we never enter the for-loop below. */
3232 count1
= SPECPDL_INDEX ();
3235 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3244 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3251 #ifdef DATAGRAM_SOCKETS
3252 if (!is_server
&& socktype
== SOCK_DGRAM
)
3254 #endif /* DATAGRAM_SOCKETS */
3256 #ifdef NON_BLOCKING_CONNECT
3257 if (is_non_blocking_client
)
3260 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3262 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3274 /* Make us close S if quit. */
3275 record_unwind_protect (close_file_unwind
, make_number (s
));
3277 /* Parse network options in the arg list.
3278 We simply ignore anything which isn't a known option (including other keywords).
3279 An error is signaled if setting a known option fails. */
3280 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3281 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3285 /* Configure as a server socket. */
3287 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3288 explicit :reuseaddr key to override this. */
3289 #ifdef HAVE_LOCAL_SOCKETS
3290 if (family
!= AF_LOCAL
)
3292 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3295 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3296 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3299 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3300 report_file_error ("Cannot bind server socket", Qnil
);
3302 #ifdef HAVE_GETSOCKNAME
3303 if (EQ (service
, Qt
))
3305 struct sockaddr_in sa1
;
3306 socklen_t len1
= sizeof (sa1
);
3307 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3309 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3310 service
= make_number (ntohs (sa1
.sin_port
));
3311 contact
= Fplist_put (contact
, QCservice
, service
);
3316 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3317 report_file_error ("Cannot listen on server socket", Qnil
);
3325 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3328 if (ret
== 0 || xerrno
== EISCONN
)
3330 /* The unwind-protect will be discarded afterwards.
3331 Likewise for immediate_quit. */
3335 #ifdef NON_BLOCKING_CONNECT
3337 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3341 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3348 if (xerrno
== EINTR
)
3350 /* Unlike most other syscalls connect() cannot be called
3351 again. (That would return EALREADY.) The proper way to
3352 wait for completion is pselect(). */
3360 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3366 report_file_error ("select failed", Qnil
);
3370 len
= sizeof xerrno
;
3371 eassert (FD_ISSET (s
, &fdset
));
3372 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3373 report_file_error ("getsockopt failed", Qnil
);
3375 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3379 #endif /* !WINDOWSNT */
3383 /* Discard the unwind protect closing S. */
3384 specpdl_ptr
= specpdl
+ count1
;
3389 if (xerrno
== EINTR
)
3396 #ifdef DATAGRAM_SOCKETS
3397 if (socktype
== SOCK_DGRAM
)
3399 if (datagram_address
[s
].sa
)
3401 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3402 datagram_address
[s
].len
= lres
->ai_addrlen
;
3406 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3407 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3410 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3411 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3412 conv_lisp_to_sockaddr (rfamily
, remote
,
3413 datagram_address
[s
].sa
, rlen
);
3417 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3420 contact
= Fplist_put (contact
, QCaddress
,
3421 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3422 #ifdef HAVE_GETSOCKNAME
3425 struct sockaddr_in sa1
;
3426 socklen_t len1
= sizeof (sa1
);
3427 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3428 contact
= Fplist_put (contact
, QClocal
,
3429 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3436 #ifdef HAVE_GETADDRINFO
3445 /* Discard the unwind protect for closing S, if any. */
3446 specpdl_ptr
= specpdl
+ count1
;
3448 /* Unwind bind_polling_period and request_sigio. */
3449 unbind_to (count
, Qnil
);
3453 /* If non-blocking got this far - and failed - assume non-blocking is
3454 not supported after all. This is probably a wrong assumption, but
3455 the normal blocking calls to open-network-stream handles this error
3457 if (is_non_blocking_client
)
3462 report_file_error ("make server process failed", contact
);
3464 report_file_error ("make client process failed", contact
);
3471 buffer
= Fget_buffer_create (buffer
);
3472 proc
= make_process (name
);
3474 chan_process
[inch
] = proc
;
3477 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3480 fcntl (inch
, F_SETFL
, O_NDELAY
);
3484 p
= XPROCESS (proc
);
3486 pset_childp (p
, contact
);
3487 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3488 pset_type (p
, Qnetwork
);
3490 pset_buffer (p
, buffer
);
3491 pset_sentinel (p
, sentinel
);
3492 pset_filter (p
, filter
);
3493 pset_log (p
, Fplist_get (contact
, QClog
));
3494 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3495 p
->kill_without_query
= 1;
3496 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3497 pset_command (p
, Qt
);
3501 if (is_server
&& socktype
!= SOCK_DGRAM
)
3502 pset_status (p
, Qlisten
);
3504 /* Make the process marker point into the process buffer (if any). */
3505 if (BUFFERP (buffer
))
3506 set_marker_both (p
->mark
, buffer
,
3507 BUF_ZV (XBUFFER (buffer
)),
3508 BUF_ZV_BYTE (XBUFFER (buffer
)));
3510 #ifdef NON_BLOCKING_CONNECT
3511 if (is_non_blocking_client
)
3513 /* We may get here if connect did succeed immediately. However,
3514 in that case, we still need to signal this like a non-blocking
3516 pset_status (p
, Qconnect
);
3517 if (!FD_ISSET (inch
, &connect_wait_mask
))
3519 FD_SET (inch
, &connect_wait_mask
);
3520 FD_SET (inch
, &write_mask
);
3521 num_pending_connects
++;
3526 /* A server may have a client filter setting of Qt, but it must
3527 still listen for incoming connects unless it is stopped. */
3528 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3529 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3531 FD_SET (inch
, &input_wait_mask
);
3532 FD_SET (inch
, &non_keyboard_wait_mask
);
3535 if (inch
> max_process_desc
)
3536 max_process_desc
= inch
;
3538 tem
= Fplist_member (contact
, QCcoding
);
3539 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3540 tem
= Qnil
; /* No error message (too late!). */
3543 /* Setup coding systems for communicating with the network stream. */
3544 struct gcpro gcpro1
;
3545 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3546 Lisp_Object coding_systems
= Qt
;
3547 Lisp_Object fargs
[5], val
;
3551 val
= XCAR (XCDR (tem
));
3555 else if (!NILP (Vcoding_system_for_read
))
3556 val
= Vcoding_system_for_read
;
3557 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3558 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3559 /* We dare not decode end-of-line format by setting VAL to
3560 Qraw_text, because the existing Emacs Lisp libraries
3561 assume that they receive bare code including a sequence of
3566 if (NILP (host
) || NILP (service
))
3567 coding_systems
= Qnil
;
3570 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3571 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3573 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3576 if (CONSP (coding_systems
))
3577 val
= XCAR (coding_systems
);
3578 else if (CONSP (Vdefault_process_coding_system
))
3579 val
= XCAR (Vdefault_process_coding_system
);
3583 pset_decode_coding_system (p
, val
);
3587 val
= XCAR (XCDR (tem
));
3591 else if (!NILP (Vcoding_system_for_write
))
3592 val
= Vcoding_system_for_write
;
3593 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3597 if (EQ (coding_systems
, Qt
))
3599 if (NILP (host
) || NILP (service
))
3600 coding_systems
= Qnil
;
3603 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3604 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3606 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3610 if (CONSP (coding_systems
))
3611 val
= XCDR (coding_systems
);
3612 else if (CONSP (Vdefault_process_coding_system
))
3613 val
= XCDR (Vdefault_process_coding_system
);
3617 pset_encode_coding_system (p
, val
);
3619 setup_process_coding_systems (proc
);
3621 pset_decoding_buf (p
, empty_unibyte_string
);
3622 p
->decoding_carryover
= 0;
3623 pset_encoding_buf (p
, empty_unibyte_string
);
3625 p
->inherit_coding_system_flag
3626 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3633 #if defined (HAVE_NET_IF_H)
3636 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3637 doc
: /* Return an alist of all network interfaces and their network address.
3638 Each element is a cons, the car of which is a string containing the
3639 interface name, and the cdr is the network address in internal
3640 format; see the description of ADDRESS in `make-network-process'. */)
3643 struct ifconf ifconf
;
3644 struct ifreq
*ifreq
;
3646 ptrdiff_t buf_size
= 512;
3650 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3656 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3657 ifconf
.ifc_buf
= buf
;
3658 ifconf
.ifc_len
= buf_size
;
3659 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3666 while (ifconf
.ifc_len
== buf_size
);
3671 ifreq
= ifconf
.ifc_req
;
3672 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3674 struct ifreq
*ifq
= ifreq
;
3675 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3676 #define SIZEOF_IFREQ(sif) \
3677 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3678 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3680 int len
= SIZEOF_IFREQ (ifq
);
3682 int len
= sizeof (*ifreq
);
3684 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3686 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3688 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3691 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3692 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3693 res
= Fcons (Fcons (build_string (namebuf
),
3694 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3695 sizeof (struct sockaddr
))),
3702 #endif /* SIOCGIFCONF */
3704 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3708 const char *flag_sym
;
3711 static const struct ifflag_def ifflag_table
[] = {
3715 #ifdef IFF_BROADCAST
3716 { IFF_BROADCAST
, "broadcast" },
3719 { IFF_DEBUG
, "debug" },
3722 { IFF_LOOPBACK
, "loopback" },
3724 #ifdef IFF_POINTOPOINT
3725 { IFF_POINTOPOINT
, "pointopoint" },
3728 { IFF_RUNNING
, "running" },
3731 { IFF_NOARP
, "noarp" },
3734 { IFF_PROMISC
, "promisc" },
3736 #ifdef IFF_NOTRAILERS
3737 #ifdef NS_IMPL_COCOA
3738 /* Really means smart, notrailers is obsolete */
3739 { IFF_NOTRAILERS
, "smart" },
3741 { IFF_NOTRAILERS
, "notrailers" },
3745 { IFF_ALLMULTI
, "allmulti" },
3748 { IFF_MASTER
, "master" },
3751 { IFF_SLAVE
, "slave" },
3753 #ifdef IFF_MULTICAST
3754 { IFF_MULTICAST
, "multicast" },
3757 { IFF_PORTSEL
, "portsel" },
3759 #ifdef IFF_AUTOMEDIA
3760 { IFF_AUTOMEDIA
, "automedia" },
3763 { IFF_DYNAMIC
, "dynamic" },
3766 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3769 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3772 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3775 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3778 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3783 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3784 doc
: /* Return information about network interface named IFNAME.
3785 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3786 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3787 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3788 FLAGS is the current flags of the interface. */)
3789 (Lisp_Object ifname
)
3792 Lisp_Object res
= Qnil
;
3796 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3797 && defined HAVE_GETIFADDRS && defined LLADDR)
3798 struct ifaddrs
*ifap
;
3801 CHECK_STRING (ifname
);
3803 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3804 error ("interface name too long");
3805 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3807 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3812 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3813 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3815 int flags
= rq
.ifr_flags
;
3816 const struct ifflag_def
*fp
;
3819 /* If flags is smaller than int (i.e. short) it may have the high bit set
3820 due to IFF_MULTICAST. In that case, sign extending it into
3822 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3823 flags
= (unsigned short) rq
.ifr_flags
;
3826 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3828 if (flags
& fp
->flag_bit
)
3830 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3831 flags
-= fp
->flag_bit
;
3834 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3838 elt
= Fcons (make_number (fnum
), elt
);
3843 res
= Fcons (elt
, res
);
3846 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3847 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3849 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3850 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3854 for (n
= 0; n
< 6; n
++)
3855 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3856 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3858 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3859 if (getifaddrs (&ifap
) != -1)
3861 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3862 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3865 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3867 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3868 unsigned char linkaddr
[6];
3871 if (it
->ifa_addr
->sa_family
!= AF_LINK
3872 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3873 || sdl
->sdl_alen
!= 6)
3876 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3877 for (n
= 0; n
< 6; n
++)
3878 p
->contents
[n
] = make_number (linkaddr
[n
]);
3880 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3884 #ifdef HAVE_FREEIFADDRS
3888 #endif /* HAVE_GETIFADDRS && LLADDR */
3890 res
= Fcons (elt
, res
);
3893 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3894 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3897 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3898 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3900 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3904 res
= Fcons (elt
, res
);
3907 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3908 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3911 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3914 res
= Fcons (elt
, res
);
3917 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3918 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3921 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3924 res
= Fcons (elt
, res
);
3928 return any
? res
: Qnil
;
3931 #endif /* defined (HAVE_NET_IF_H) */
3933 /* Turn off input and output for process PROC. */
3936 deactivate_process (Lisp_Object proc
)
3938 register int inchannel
, outchannel
;
3939 register struct Lisp_Process
*p
= XPROCESS (proc
);
3942 /* Delete GnuTLS structures in PROC, if any. */
3943 emacs_gnutls_deinit (proc
);
3944 #endif /* HAVE_GNUTLS */
3946 inchannel
= p
->infd
;
3947 outchannel
= p
->outfd
;
3949 #ifdef ADAPTIVE_READ_BUFFERING
3950 if (p
->read_output_delay
> 0)
3952 if (--process_output_delay_count
< 0)
3953 process_output_delay_count
= 0;
3954 p
->read_output_delay
= 0;
3955 p
->read_output_skip
= 0;
3961 /* Beware SIGCHLD hereabouts. */
3962 flush_pending_output (inchannel
);
3963 emacs_close (inchannel
);
3964 if (outchannel
>= 0 && outchannel
!= inchannel
)
3965 emacs_close (outchannel
);
3969 #ifdef DATAGRAM_SOCKETS
3970 if (DATAGRAM_CHAN_P (inchannel
))
3972 xfree (datagram_address
[inchannel
].sa
);
3973 datagram_address
[inchannel
].sa
= 0;
3974 datagram_address
[inchannel
].len
= 0;
3977 chan_process
[inchannel
] = Qnil
;
3978 FD_CLR (inchannel
, &input_wait_mask
);
3979 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3980 #ifdef NON_BLOCKING_CONNECT
3981 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3983 FD_CLR (inchannel
, &connect_wait_mask
);
3984 FD_CLR (inchannel
, &write_mask
);
3985 if (--num_pending_connects
< 0)
3989 if (inchannel
== max_process_desc
)
3992 /* We just closed the highest-numbered process input descriptor,
3993 so recompute the highest-numbered one now. */
3994 max_process_desc
= 0;
3995 for (i
= 0; i
< MAXDESC
; i
++)
3996 if (!NILP (chan_process
[i
]))
3997 max_process_desc
= i
;
4003 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4005 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4006 It is read into the process' buffers or given to their filter functions.
4007 Non-nil arg PROCESS means do not return until some output has been received
4010 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4011 and milliseconds to wait; return after that much time whether or not
4012 there is any subprocess output. If SECONDS is a floating point number,
4013 it specifies a fractional number of seconds to wait.
4014 The MILLISEC argument is obsolete and should be avoided.
4016 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4017 from PROCESS, suspending reading output from other processes.
4018 If JUST-THIS-ONE is an integer, don't run any timers either.
4019 Return non-nil if we received any output before the timeout expired. */)
4020 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4025 if (! NILP (process
))
4026 CHECK_PROCESS (process
);
4028 just_this_one
= Qnil
;
4030 if (!NILP (millisec
))
4031 { /* Obsolete calling convention using integers rather than floats. */
4032 CHECK_NUMBER (millisec
);
4034 seconds
= make_float (XINT (millisec
) / 1000.0);
4037 CHECK_NUMBER (seconds
);
4038 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4045 if (!NILP (seconds
))
4047 if (INTEGERP (seconds
))
4049 if (0 < XINT (seconds
))
4051 secs
= XINT (seconds
);
4055 else if (FLOATP (seconds
))
4057 if (0 < XFLOAT_DATA (seconds
))
4059 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4060 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
4061 nsecs
= EMACS_NSECS (t
);
4065 wrong_type_argument (Qnumberp
, seconds
);
4067 else if (! NILP (process
))
4071 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4073 !NILP (process
) ? XPROCESS (process
) : NULL
,
4074 NILP (just_this_one
) ? 0 :
4075 !INTEGERP (just_this_one
) ? 1 : -1)
4079 /* Accept a connection for server process SERVER on CHANNEL. */
4081 static int connect_counter
= 0;
4084 server_accept_connection (Lisp_Object server
, int channel
)
4086 Lisp_Object proc
, caller
, name
, buffer
;
4087 Lisp_Object contact
, host
, service
;
4088 struct Lisp_Process
*ps
= XPROCESS (server
);
4089 struct Lisp_Process
*p
;
4093 struct sockaddr_in in
;
4095 struct sockaddr_in6 in6
;
4097 #ifdef HAVE_LOCAL_SOCKETS
4098 struct sockaddr_un un
;
4101 socklen_t len
= sizeof saddr
;
4103 s
= accept (channel
, &saddr
.sa
, &len
);
4112 if (code
== EWOULDBLOCK
)
4116 if (!NILP (ps
->log
))
4117 call3 (ps
->log
, server
, Qnil
,
4118 concat3 (build_string ("accept failed with code"),
4119 Fnumber_to_string (make_number (code
)),
4120 build_string ("\n")));
4126 /* Setup a new process to handle the connection. */
4128 /* Generate a unique identification of the caller, and build contact
4129 information for this process. */
4132 switch (saddr
.sa
.sa_family
)
4136 Lisp_Object args
[5];
4137 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4138 args
[0] = build_string ("%d.%d.%d.%d");
4139 args
[1] = make_number (*ip
++);
4140 args
[2] = make_number (*ip
++);
4141 args
[3] = make_number (*ip
++);
4142 args
[4] = make_number (*ip
++);
4143 host
= Fformat (5, args
);
4144 service
= make_number (ntohs (saddr
.in
.sin_port
));
4146 args
[0] = build_string (" <%s:%d>");
4149 caller
= Fformat (3, args
);
4156 Lisp_Object args
[9];
4157 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4159 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4160 for (i
= 0; i
< 8; i
++)
4161 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4162 host
= Fformat (9, args
);
4163 service
= make_number (ntohs (saddr
.in
.sin_port
));
4165 args
[0] = build_string (" <[%s]:%d>");
4168 caller
= Fformat (3, args
);
4173 #ifdef HAVE_LOCAL_SOCKETS
4177 caller
= Fnumber_to_string (make_number (connect_counter
));
4178 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4182 /* Create a new buffer name for this process if it doesn't have a
4183 filter. The new buffer name is based on the buffer name or
4184 process name of the server process concatenated with the caller
4187 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4191 buffer
= ps
->buffer
;
4193 buffer
= Fbuffer_name (buffer
);
4198 buffer
= concat2 (buffer
, caller
);
4199 buffer
= Fget_buffer_create (buffer
);
4203 /* Generate a unique name for the new server process. Combine the
4204 server process name with the caller identification. */
4206 name
= concat2 (ps
->name
, caller
);
4207 proc
= make_process (name
);
4209 chan_process
[s
] = proc
;
4212 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4215 fcntl (s
, F_SETFL
, O_NDELAY
);
4219 p
= XPROCESS (proc
);
4221 /* Build new contact information for this setup. */
4222 contact
= Fcopy_sequence (ps
->childp
);
4223 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4224 contact
= Fplist_put (contact
, QChost
, host
);
4225 if (!NILP (service
))
4226 contact
= Fplist_put (contact
, QCservice
, service
);
4227 contact
= Fplist_put (contact
, QCremote
,
4228 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4229 #ifdef HAVE_GETSOCKNAME
4231 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4232 contact
= Fplist_put (contact
, QClocal
,
4233 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4236 pset_childp (p
, contact
);
4237 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4238 pset_type (p
, Qnetwork
);
4240 pset_buffer (p
, buffer
);
4241 pset_sentinel (p
, ps
->sentinel
);
4242 pset_filter (p
, ps
->filter
);
4243 pset_command (p
, Qnil
);
4247 pset_status (p
, Qrun
);
4249 /* Client processes for accepted connections are not stopped initially. */
4250 if (!EQ (p
->filter
, Qt
))
4252 FD_SET (s
, &input_wait_mask
);
4253 FD_SET (s
, &non_keyboard_wait_mask
);
4256 if (s
> max_process_desc
)
4257 max_process_desc
= s
;
4259 /* Setup coding system for new process based on server process.
4260 This seems to be the proper thing to do, as the coding system
4261 of the new process should reflect the settings at the time the
4262 server socket was opened; not the current settings. */
4264 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4265 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4266 setup_process_coding_systems (proc
);
4268 pset_decoding_buf (p
, empty_unibyte_string
);
4269 p
->decoding_carryover
= 0;
4270 pset_encoding_buf (p
, empty_unibyte_string
);
4272 p
->inherit_coding_system_flag
4273 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4275 if (!NILP (ps
->log
))
4276 call3 (ps
->log
, server
, proc
,
4277 concat3 (build_string ("accept from "),
4278 (STRINGP (host
) ? host
: build_string ("-")),
4279 build_string ("\n")));
4281 if (!NILP (p
->sentinel
))
4282 exec_sentinel (proc
,
4283 concat3 (build_string ("open from "),
4284 (STRINGP (host
) ? host
: build_string ("-")),
4285 build_string ("\n")));
4288 /* This variable is different from waiting_for_input in keyboard.c.
4289 It is used to communicate to a lisp process-filter/sentinel (via the
4290 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4291 for user-input when that process-filter was called.
4292 waiting_for_input cannot be used as that is by definition 0 when
4293 lisp code is being evalled.
4294 This is also used in record_asynch_buffer_change.
4295 For that purpose, this must be 0
4296 when not inside wait_reading_process_output. */
4297 static int waiting_for_user_input_p
;
4300 wait_reading_process_output_unwind (Lisp_Object data
)
4302 waiting_for_user_input_p
= XINT (data
);
4306 /* This is here so breakpoints can be put on it. */
4308 wait_reading_process_output_1 (void)
4312 /* Read and dispose of subprocess output while waiting for timeout to
4313 elapse and/or keyboard input to be available.
4317 If negative, gobble data immediately available but don't wait for any.
4320 an additional duration to wait, measured in nanoseconds
4321 If TIME_LIMIT is zero, then:
4322 If NSECS == 0, there is no limit.
4323 If NSECS > 0, the timeout consists of NSECS only.
4324 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4327 0 to ignore keyboard input, or
4328 1 to return when input is available, or
4329 -1 meaning caller will actually read the input, so don't throw to
4330 the quit handler, or
4332 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4333 output that arrives.
4335 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4336 (and gobble terminal input into the buffer if any arrives).
4338 If WAIT_PROC is specified, wait until something arrives from that
4339 process. The return value is true if we read some input from
4342 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4343 (suspending output from other processes). A negative value
4344 means don't run any timers either.
4346 If WAIT_PROC is specified, then the function returns true if we
4347 received input from that process before the timeout elapsed.
4348 Otherwise, return true if we received input from any process. */
4351 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4353 Lisp_Object wait_for_cell
,
4354 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4356 register int channel
, nfds
;
4357 SELECT_TYPE Available
;
4358 SELECT_TYPE Writeok
;
4360 int check_delay
, no_avail
;
4363 EMACS_TIME timeout
, end_time
;
4364 int wait_channel
= -1;
4365 int got_some_input
= 0;
4366 ptrdiff_t count
= SPECPDL_INDEX ();
4368 FD_ZERO (&Available
);
4371 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4372 && !(CONSP (wait_proc
->status
)
4373 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4374 message ("Blocking call to accept-process-output with quit inhibited!!");
4376 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4377 if (wait_proc
!= NULL
)
4378 wait_channel
= wait_proc
->infd
;
4380 record_unwind_protect (wait_reading_process_output_unwind
,
4381 make_number (waiting_for_user_input_p
));
4382 waiting_for_user_input_p
= read_kbd
;
4389 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4390 time_limit
= TYPE_MAXIMUM (time_t);
4392 /* Since we may need to wait several times,
4393 compute the absolute time to return at. */
4394 if (time_limit
|| 0 < nsecs
)
4396 timeout
= make_emacs_time (time_limit
, nsecs
);
4397 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4402 int timeout_reduced_for_timers
= 0;
4404 /* If calling from keyboard input, do not quit
4405 since we want to return C-g as an input character.
4406 Otherwise, do pending quit if requested. */
4411 process_pending_signals ();
4414 /* Exit now if the cell we're waiting for became non-nil. */
4415 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4418 /* Compute time from now till when time limit is up */
4419 /* Exit if already run out */
4422 /* A negative timeout means
4423 gobble output available now
4424 but don't wait at all. */
4426 timeout
= make_emacs_time (0, 0);
4428 else if (time_limit
|| 0 < nsecs
)
4430 EMACS_TIME now
= current_emacs_time ();
4431 if (EMACS_TIME_LE (end_time
, now
))
4433 timeout
= sub_emacs_time (end_time
, now
);
4437 timeout
= make_emacs_time (100000, 0);
4440 /* Normally we run timers here.
4441 But not if wait_for_cell; in those cases,
4442 the wait is supposed to be short,
4443 and those callers cannot handle running arbitrary Lisp code here. */
4444 if (NILP (wait_for_cell
)
4445 && just_wait_proc
>= 0)
4447 EMACS_TIME timer_delay
;
4451 int old_timers_run
= timers_run
;
4452 struct buffer
*old_buffer
= current_buffer
;
4453 Lisp_Object old_window
= selected_window
;
4455 timer_delay
= timer_check ();
4457 /* If a timer has run, this might have changed buffers
4458 an alike. Make read_key_sequence aware of that. */
4459 if (timers_run
!= old_timers_run
4460 && (old_buffer
!= current_buffer
4461 || !EQ (old_window
, selected_window
))
4462 && waiting_for_user_input_p
== -1)
4463 record_asynch_buffer_change ();
4465 if (timers_run
!= old_timers_run
&& do_display
)
4466 /* We must retry, since a timer may have requeued itself
4467 and that could alter the time_delay. */
4468 redisplay_preserve_echo_area (9);
4472 while (!detect_input_pending ());
4474 /* If there is unread keyboard input, also return. */
4476 && requeued_events_pending_p ())
4479 /* A negative timeout means do not wait at all. */
4482 if (EMACS_TIME_VALID_P (timer_delay
))
4484 if (EMACS_TIME_LT (timer_delay
, timeout
))
4486 timeout
= timer_delay
;
4487 timeout_reduced_for_timers
= 1;
4492 /* This is so a breakpoint can be put here. */
4493 wait_reading_process_output_1 ();
4498 /* Cause C-g and alarm signals to take immediate action,
4499 and cause input available signals to zero out timeout.
4501 It is important that we do this before checking for process
4502 activity. If we get a SIGCHLD after the explicit checks for
4503 process activity, timeout is the only way we will know. */
4505 set_waiting_for_input (&timeout
);
4507 /* If status of something has changed, and no input is
4508 available, notify the user of the change right away. After
4509 this explicit check, we'll let the SIGCHLD handler zap
4510 timeout to get our attention. */
4511 if (update_tick
!= process_tick
)
4516 if (kbd_on_hold_p ())
4519 Atemp
= input_wait_mask
;
4522 timeout
= make_emacs_time (0, 0);
4523 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4525 #ifdef NON_BLOCKING_CONNECT
4526 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4530 NULL
, &timeout
, NULL
)
4533 /* It's okay for us to do this and then continue with
4534 the loop, since timeout has already been zeroed out. */
4535 clear_waiting_for_input ();
4536 status_notify (NULL
);
4537 if (do_display
) redisplay_preserve_echo_area (13);
4541 /* Don't wait for output from a non-running process. Just
4542 read whatever data has already been received. */
4543 if (wait_proc
&& wait_proc
->raw_status_new
)
4544 update_status (wait_proc
);
4546 && ! EQ (wait_proc
->status
, Qrun
)
4547 && ! EQ (wait_proc
->status
, Qconnect
))
4549 int nread
, total_nread
= 0;
4551 clear_waiting_for_input ();
4552 XSETPROCESS (proc
, wait_proc
);
4554 /* Read data from the process, until we exhaust it. */
4555 while (wait_proc
->infd
>= 0)
4557 nread
= read_process_output (proc
, wait_proc
->infd
);
4564 total_nread
+= nread
;
4568 else if (nread
== -1 && EIO
== errno
)
4572 else if (nread
== -1 && EAGAIN
== errno
)
4576 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4580 if (total_nread
> 0 && do_display
)
4581 redisplay_preserve_echo_area (10);
4586 /* Wait till there is something to do */
4588 if (wait_proc
&& just_wait_proc
)
4590 if (wait_proc
->infd
< 0) /* Terminated */
4592 FD_SET (wait_proc
->infd
, &Available
);
4596 else if (!NILP (wait_for_cell
))
4598 Available
= non_process_wait_mask
;
4605 Available
= non_keyboard_wait_mask
;
4607 Available
= input_wait_mask
;
4608 Writeok
= write_mask
;
4609 #ifdef SELECT_CANT_DO_WRITE_MASK
4614 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4617 /* If frame size has changed or the window is newly mapped,
4618 redisplay now, before we start to wait. There is a race
4619 condition here; if a SIGIO arrives between now and the select
4620 and indicates that a frame is trashed, the select may block
4621 displaying a trashed screen. */
4622 if (frame_garbaged
&& do_display
)
4624 clear_waiting_for_input ();
4625 redisplay_preserve_echo_area (11);
4627 set_waiting_for_input (&timeout
);
4630 /* Skip the `select' call if input is available and we're
4631 waiting for keyboard input or a cell change (which can be
4632 triggered by processing X events). In the latter case, set
4633 nfds to 1 to avoid breaking the loop. */
4635 if ((read_kbd
|| !NILP (wait_for_cell
))
4636 && detect_input_pending ())
4638 nfds
= read_kbd
? 0 : 1;
4645 #ifdef ADAPTIVE_READ_BUFFERING
4646 /* Set the timeout for adaptive read buffering if any
4647 process has non-zero read_output_skip and non-zero
4648 read_output_delay, and we are not reading output for a
4649 specific wait_channel. It is not executed if
4650 Vprocess_adaptive_read_buffering is nil. */
4651 if (process_output_skip
&& check_delay
> 0)
4653 int nsecs
= EMACS_NSECS (timeout
);
4654 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4655 nsecs
= READ_OUTPUT_DELAY_MAX
;
4656 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4658 proc
= chan_process
[channel
];
4661 /* Find minimum non-zero read_output_delay among the
4662 processes with non-zero read_output_skip. */
4663 if (XPROCESS (proc
)->read_output_delay
> 0)
4666 if (!XPROCESS (proc
)->read_output_skip
)
4668 FD_CLR (channel
, &Available
);
4669 XPROCESS (proc
)->read_output_skip
= 0;
4670 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4671 nsecs
= XPROCESS (proc
)->read_output_delay
;
4674 timeout
= make_emacs_time (0, nsecs
);
4675 process_output_skip
= 0;
4679 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4681 #elif defined (HAVE_NS)
4686 (max (max_process_desc
, max_input_desc
) + 1,
4688 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4689 NULL
, &timeout
, NULL
);
4692 /* GnuTLS buffers data internally. In lowat mode it leaves
4693 some data in the TCP buffers so that select works, but
4694 with custom pull/push functions we need to check if some
4695 data is available in the buffers manually. */
4700 /* We're not waiting on a specific process, so loop
4701 through all the channels and check for data.
4702 This is a workaround needed for some versions of
4703 the gnutls library -- 2.12.14 has been confirmed
4705 http://comments.gmane.org/gmane.emacs.devel/145074 */
4706 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4707 if (! NILP (chan_process
[channel
]))
4709 struct Lisp_Process
*p
=
4710 XPROCESS (chan_process
[channel
]);
4711 if (p
&& p
->gnutls_p
&& p
->infd
4712 && ((emacs_gnutls_record_check_pending
4717 FD_SET (p
->infd
, &Available
);
4723 /* Check this specific channel. */
4724 if (wait_proc
->gnutls_p
/* Check for valid process. */
4725 /* Do we have pending data? */
4726 && ((emacs_gnutls_record_check_pending
4727 (wait_proc
->gnutls_state
))
4731 /* Set to Available. */
4732 FD_SET (wait_proc
->infd
, &Available
);
4741 /* Make C-g and alarm signals set flags again */
4742 clear_waiting_for_input ();
4744 /* If we woke up due to SIGWINCH, actually change size now. */
4745 do_pending_window_change (0);
4747 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4748 /* We waited the full specified time, so return now. */
4752 if (xerrno
== EINTR
)
4754 else if (xerrno
== EBADF
)
4757 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4758 the child's closure of the pts gives the parent a SIGHUP, and
4759 the ptc file descriptor is automatically closed,
4760 yielding EBADF here or at select() call above.
4761 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4762 in m/ibmrt-aix.h), and here we just ignore the select error.
4763 Cleanup occurs c/o status_notify after SIGCLD. */
4764 no_avail
= 1; /* Cannot depend on values returned */
4770 error ("select error: %s", emacs_strerror (xerrno
));
4775 FD_ZERO (&Available
);
4779 #if 0 /* When polling is used, interrupt_input is 0,
4780 so get_input_pending should read the input.
4781 So this should not be needed. */
4782 /* If we are using polling for input,
4783 and we see input available, make it get read now.
4784 Otherwise it might not actually get read for a second.
4785 And on hpux, since we turn off polling in wait_reading_process_output,
4786 it might never get read at all if we don't spend much time
4787 outside of wait_reading_process_output. */
4788 if (read_kbd
&& interrupt_input
4789 && keyboard_bit_set (&Available
)
4790 && input_polling_used ())
4791 kill (getpid (), SIGALRM
);
4794 /* Check for keyboard input */
4795 /* If there is any, return immediately
4796 to give it higher priority than subprocesses */
4800 int old_timers_run
= timers_run
;
4801 struct buffer
*old_buffer
= current_buffer
;
4802 Lisp_Object old_window
= selected_window
;
4805 if (detect_input_pending_run_timers (do_display
))
4807 swallow_events (do_display
);
4808 if (detect_input_pending_run_timers (do_display
))
4812 /* If a timer has run, this might have changed buffers
4813 an alike. Make read_key_sequence aware of that. */
4814 if (timers_run
!= old_timers_run
4815 && waiting_for_user_input_p
== -1
4816 && (old_buffer
!= current_buffer
4817 || !EQ (old_window
, selected_window
)))
4818 record_asynch_buffer_change ();
4824 /* If there is unread keyboard input, also return. */
4826 && requeued_events_pending_p ())
4829 /* If we are not checking for keyboard input now,
4830 do process events (but don't run any timers).
4831 This is so that X events will be processed.
4832 Otherwise they may have to wait until polling takes place.
4833 That would causes delays in pasting selections, for example.
4835 (We used to do this only if wait_for_cell.) */
4836 if (read_kbd
== 0 && detect_input_pending ())
4838 swallow_events (do_display
);
4839 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4840 if (detect_input_pending ())
4845 /* Exit now if the cell we're waiting for became non-nil. */
4846 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4850 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4851 go read it. This can happen with X on BSD after logging out.
4852 In that case, there really is no input and no SIGIO,
4853 but select says there is input. */
4855 if (read_kbd
&& interrupt_input
4856 && keyboard_bit_set (&Available
) && ! noninteractive
)
4857 kill (getpid (), SIGIO
);
4861 got_some_input
|= nfds
> 0;
4863 /* If checking input just got us a size-change event from X,
4864 obey it now if we should. */
4865 if (read_kbd
|| ! NILP (wait_for_cell
))
4866 do_pending_window_change (0);
4868 /* Check for data from a process. */
4869 if (no_avail
|| nfds
== 0)
4872 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4874 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4876 && ((d
->condition
& FOR_READ
4877 && FD_ISSET (channel
, &Available
))
4878 || (d
->condition
& FOR_WRITE
4879 && FD_ISSET (channel
, &write_mask
))))
4880 d
->func (channel
, d
->data
);
4883 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4885 if (FD_ISSET (channel
, &Available
)
4886 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4887 && !FD_ISSET (channel
, &non_process_wait_mask
))
4891 /* If waiting for this channel, arrange to return as
4892 soon as no more input to be processed. No more
4894 if (wait_channel
== channel
)
4900 proc
= chan_process
[channel
];
4904 /* If this is a server stream socket, accept connection. */
4905 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4907 server_accept_connection (proc
, channel
);
4911 /* Read data from the process, starting with our
4912 buffered-ahead character if we have one. */
4914 nread
= read_process_output (proc
, channel
);
4917 /* Since read_process_output can run a filter,
4918 which can call accept-process-output,
4919 don't try to read from any other processes
4920 before doing the select again. */
4921 FD_ZERO (&Available
);
4924 redisplay_preserve_echo_area (12);
4927 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4930 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4931 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4933 else if (nread
== -1 && errno
== EAGAIN
)
4937 else if (nread
== -1 && errno
== EAGAIN
)
4939 /* Note that we cannot distinguish between no input
4940 available now and a closed pipe.
4941 With luck, a closed pipe will be accompanied by
4942 subprocess termination and SIGCHLD. */
4943 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4945 #endif /* O_NDELAY */
4946 #endif /* O_NONBLOCK */
4948 /* On some OSs with ptys, when the process on one end of
4949 a pty exits, the other end gets an error reading with
4950 errno = EIO instead of getting an EOF (0 bytes read).
4951 Therefore, if we get an error reading and errno =
4952 EIO, just continue, because the child process has
4953 exited and should clean itself up soon (e.g. when we
4956 However, it has been known to happen that the SIGCHLD
4957 got lost. So raise the signal again just in case.
4959 else if (nread
== -1 && errno
== EIO
)
4961 struct Lisp_Process
*p
= XPROCESS (proc
);
4963 /* Clear the descriptor now, so we only raise the
4965 FD_CLR (channel
, &input_wait_mask
);
4966 FD_CLR (channel
, &non_keyboard_wait_mask
);
4970 /* If the EIO occurs on a pty, sigchld_handler's
4971 waitpid() will not find the process object to
4972 delete. Do it here. */
4973 p
->tick
= ++process_tick
;
4974 pset_status (p
, Qfailed
);
4977 kill (getpid (), SIGCHLD
);
4979 #endif /* HAVE_PTYS */
4980 /* If we can detect process termination, don't consider the
4981 process gone just because its pipe is closed. */
4983 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4988 /* Preserve status of processes already terminated. */
4989 XPROCESS (proc
)->tick
= ++process_tick
;
4990 deactivate_process (proc
);
4991 if (XPROCESS (proc
)->raw_status_new
)
4992 update_status (XPROCESS (proc
));
4993 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4994 pset_status (XPROCESS (proc
),
4995 list2 (Qexit
, make_number (256)));
4998 #ifdef NON_BLOCKING_CONNECT
4999 if (FD_ISSET (channel
, &Writeok
)
5000 && FD_ISSET (channel
, &connect_wait_mask
))
5002 struct Lisp_Process
*p
;
5004 FD_CLR (channel
, &connect_wait_mask
);
5005 FD_CLR (channel
, &write_mask
);
5006 if (--num_pending_connects
< 0)
5009 proc
= chan_process
[channel
];
5013 p
= XPROCESS (proc
);
5016 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5017 So only use it on systems where it is known to work. */
5019 socklen_t xlen
= sizeof (xerrno
);
5020 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5025 struct sockaddr pname
;
5026 int pnamelen
= sizeof (pname
);
5028 /* If connection failed, getpeername will fail. */
5030 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5032 /* Obtain connect failure code through error slippage. */
5035 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5042 p
->tick
= ++process_tick
;
5043 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
5044 deactivate_process (proc
);
5048 pset_status (p
, Qrun
);
5049 /* Execute the sentinel here. If we had relied on
5050 status_notify to do it later, it will read input
5051 from the process before calling the sentinel. */
5052 exec_sentinel (proc
, build_string ("open\n"));
5053 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5055 FD_SET (p
->infd
, &input_wait_mask
);
5056 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5060 #endif /* NON_BLOCKING_CONNECT */
5061 } /* end for each file descriptor */
5062 } /* end while exit conditions not met */
5064 unbind_to (count
, Qnil
);
5066 /* If calling from keyboard input, do not quit
5067 since we want to return C-g as an input character.
5068 Otherwise, do pending quit if requested. */
5071 /* Prevent input_pending from remaining set if we quit. */
5072 clear_input_pending ();
5076 return got_some_input
;
5079 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5082 read_process_output_call (Lisp_Object fun_and_args
)
5084 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5088 read_process_output_error_handler (Lisp_Object error_val
)
5090 cmd_error_internal (error_val
, "error in process filter: ");
5092 update_echo_area ();
5093 Fsleep_for (make_number (2), Qnil
);
5097 /* Read pending output from the process channel,
5098 starting with our buffered-ahead character if we have one.
5099 Yield number of decoded characters read.
5101 This function reads at most 4096 characters.
5102 If you want to read all available subprocess output,
5103 you must call it repeatedly until it returns zero.
5105 The characters read are decoded according to PROC's coding-system
5109 read_process_output (Lisp_Object proc
, register int channel
)
5111 register ssize_t nbytes
;
5113 register Lisp_Object outstream
;
5114 register struct Lisp_Process
*p
= XPROCESS (proc
);
5115 register ptrdiff_t opoint
;
5116 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5117 int carryover
= p
->decoding_carryover
;
5119 ptrdiff_t count
= SPECPDL_INDEX ();
5120 Lisp_Object odeactivate
;
5122 chars
= alloca (carryover
+ readmax
);
5124 /* See the comment above. */
5125 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5127 #ifdef DATAGRAM_SOCKETS
5128 /* We have a working select, so proc_buffered_char is always -1. */
5129 if (DATAGRAM_CHAN_P (channel
))
5131 socklen_t len
= datagram_address
[channel
].len
;
5132 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5133 0, datagram_address
[channel
].sa
, &len
);
5138 int buffered
= 0 <= proc_buffered_char
[channel
];
5141 chars
[carryover
] = proc_buffered_char
[channel
];
5142 proc_buffered_char
[channel
] = -1;
5146 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5147 readmax
- buffered
);
5150 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5151 readmax
- buffered
);
5152 #ifdef ADAPTIVE_READ_BUFFERING
5153 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5155 int delay
= p
->read_output_delay
;
5158 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5161 process_output_delay_count
++;
5162 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5165 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5167 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5169 process_output_delay_count
--;
5171 p
->read_output_delay
= delay
;
5174 p
->read_output_skip
= 1;
5175 process_output_skip
= 1;
5180 nbytes
+= buffered
&& nbytes
<= 0;
5183 p
->decoding_carryover
= 0;
5185 /* At this point, NBYTES holds number of bytes just received
5186 (including the one in proc_buffered_char[channel]). */
5189 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5191 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5194 /* Now set NBYTES how many bytes we must decode. */
5195 nbytes
+= carryover
;
5197 odeactivate
= Vdeactivate_mark
;
5198 /* There's no good reason to let process filters change the current
5199 buffer, and many callers of accept-process-output, sit-for, and
5200 friends don't expect current-buffer to be changed from under them. */
5201 record_unwind_current_buffer ();
5203 /* Read and dispose of the process output. */
5204 outstream
= p
->filter
;
5205 if (!NILP (outstream
))
5208 int outer_running_asynch_code
= running_asynch_code
;
5209 int waiting
= waiting_for_user_input_p
;
5211 /* No need to gcpro these, because all we do with them later
5212 is test them for EQness, and none of them should be a string. */
5214 Lisp_Object obuffer
, okeymap
;
5215 XSETBUFFER (obuffer
, current_buffer
);
5216 okeymap
= BVAR (current_buffer
, keymap
);
5219 /* We inhibit quit here instead of just catching it so that
5220 hitting ^G when a filter happens to be running won't screw
5222 specbind (Qinhibit_quit
, Qt
);
5223 specbind (Qlast_nonmenu_event
, Qt
);
5225 /* In case we get recursively called,
5226 and we already saved the match data nonrecursively,
5227 save the same match data in safely recursive fashion. */
5228 if (outer_running_asynch_code
)
5231 /* Don't clobber the CURRENT match data, either! */
5232 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5233 restore_search_regs ();
5234 record_unwind_save_match_data ();
5235 Fset_match_data (tem
, Qt
);
5238 /* For speed, if a search happens within this code,
5239 save the match data in a special nonrecursive fashion. */
5240 running_asynch_code
= 1;
5242 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5243 text
= coding
->dst_object
;
5244 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5245 /* A new coding system might be found. */
5246 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5248 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5250 /* Don't call setup_coding_system for
5251 proc_decode_coding_system[channel] here. It is done in
5252 detect_coding called via decode_coding above. */
5254 /* If a coding system for encoding is not yet decided, we set
5255 it as the same as coding-system for decoding.
5257 But, before doing that we must check if
5258 proc_encode_coding_system[p->outfd] surely points to a
5259 valid memory because p->outfd will be changed once EOF is
5260 sent to the process. */
5261 if (NILP (p
->encode_coding_system
)
5262 && proc_encode_coding_system
[p
->outfd
])
5264 pset_encode_coding_system
5265 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5266 setup_coding_system (p
->encode_coding_system
,
5267 proc_encode_coding_system
[p
->outfd
]);
5271 if (coding
->carryover_bytes
> 0)
5273 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5274 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5275 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5276 coding
->carryover_bytes
);
5277 p
->decoding_carryover
= coding
->carryover_bytes
;
5279 if (SBYTES (text
) > 0)
5280 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5281 sometimes it's simply wrong to wrap (e.g. when called from
5282 accept-process-output). */
5283 internal_condition_case_1 (read_process_output_call
,
5285 Fcons (proc
, Fcons (text
, Qnil
))),
5286 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5287 read_process_output_error_handler
);
5289 /* If we saved the match data nonrecursively, restore it now. */
5290 restore_search_regs ();
5291 running_asynch_code
= outer_running_asynch_code
;
5293 /* Restore waiting_for_user_input_p as it was
5294 when we were called, in case the filter clobbered it. */
5295 waiting_for_user_input_p
= waiting
;
5297 #if 0 /* Call record_asynch_buffer_change unconditionally,
5298 because we might have changed minor modes or other things
5299 that affect key bindings. */
5300 if (! EQ (Fcurrent_buffer (), obuffer
)
5301 || ! EQ (current_buffer
->keymap
, okeymap
))
5303 /* But do it only if the caller is actually going to read events.
5304 Otherwise there's no need to make him wake up, and it could
5305 cause trouble (for example it would make sit_for return). */
5306 if (waiting_for_user_input_p
== -1)
5307 record_asynch_buffer_change ();
5310 /* If no filter, write into buffer if it isn't dead. */
5311 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5313 Lisp_Object old_read_only
;
5314 ptrdiff_t old_begv
, old_zv
;
5315 ptrdiff_t old_begv_byte
, old_zv_byte
;
5316 ptrdiff_t before
, before_byte
;
5317 ptrdiff_t opoint_byte
;
5321 Fset_buffer (p
->buffer
);
5323 opoint_byte
= PT_BYTE
;
5324 old_read_only
= BVAR (current_buffer
, read_only
);
5327 old_begv_byte
= BEGV_BYTE
;
5328 old_zv_byte
= ZV_BYTE
;
5330 bset_read_only (current_buffer
, Qnil
);
5332 /* Insert new output into buffer
5333 at the current end-of-output marker,
5334 thus preserving logical ordering of input and output. */
5335 if (XMARKER (p
->mark
)->buffer
)
5336 SET_PT_BOTH (clip_to_bounds (BEGV
,
5337 marker_position (p
->mark
), ZV
),
5338 clip_to_bounds (BEGV_BYTE
,
5339 marker_byte_position (p
->mark
),
5342 SET_PT_BOTH (ZV
, ZV_BYTE
);
5344 before_byte
= PT_BYTE
;
5346 /* If the output marker is outside of the visible region, save
5347 the restriction and widen. */
5348 if (! (BEGV
<= PT
&& PT
<= ZV
))
5351 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5352 text
= coding
->dst_object
;
5353 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5354 /* A new coding system might be found. See the comment in the
5355 similar code in the previous `if' block. */
5356 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5358 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5359 if (NILP (p
->encode_coding_system
)
5360 && proc_encode_coding_system
[p
->outfd
])
5362 pset_encode_coding_system
5363 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5364 setup_coding_system (p
->encode_coding_system
,
5365 proc_encode_coding_system
[p
->outfd
]);
5368 if (coding
->carryover_bytes
> 0)
5370 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5371 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5372 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5373 coding
->carryover_bytes
);
5374 p
->decoding_carryover
= coding
->carryover_bytes
;
5376 /* Adjust the multibyteness of TEXT to that of the buffer. */
5377 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5378 != ! STRING_MULTIBYTE (text
))
5379 text
= (STRING_MULTIBYTE (text
)
5380 ? Fstring_as_unibyte (text
)
5381 : Fstring_to_multibyte (text
));
5382 /* Insert before markers in case we are inserting where
5383 the buffer's mark is, and the user's next command is Meta-y. */
5384 insert_from_string_before_markers (text
, 0, 0,
5385 SCHARS (text
), SBYTES (text
), 0);
5387 /* Make sure the process marker's position is valid when the
5388 process buffer is changed in the signal_after_change above.
5389 W3 is known to do that. */
5390 if (BUFFERP (p
->buffer
)
5391 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5392 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5394 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5396 update_mode_lines
++;
5398 /* Make sure opoint and the old restrictions
5399 float ahead of any new text just as point would. */
5400 if (opoint
>= before
)
5402 opoint
+= PT
- before
;
5403 opoint_byte
+= PT_BYTE
- before_byte
;
5405 if (old_begv
> before
)
5407 old_begv
+= PT
- before
;
5408 old_begv_byte
+= PT_BYTE
- before_byte
;
5410 if (old_zv
>= before
)
5412 old_zv
+= PT
- before
;
5413 old_zv_byte
+= PT_BYTE
- before_byte
;
5416 /* If the restriction isn't what it should be, set it. */
5417 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5418 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5421 bset_read_only (current_buffer
, old_read_only
);
5422 SET_PT_BOTH (opoint
, opoint_byte
);
5424 /* Handling the process output should not deactivate the mark. */
5425 Vdeactivate_mark
= odeactivate
;
5427 unbind_to (count
, Qnil
);
5431 /* Sending data to subprocess */
5433 static jmp_buf send_process_frame
;
5434 static Lisp_Object process_sent_to
;
5436 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5437 static _Noreturn
void send_process_trap (int);
5441 send_process_trap (int ignore
)
5443 SIGNAL_THREAD_CHECK (SIGPIPE
);
5444 sigunblock (sigmask (SIGPIPE
));
5445 longjmp (send_process_frame
, 1);
5448 /* In send_process, when a write fails temporarily,
5449 wait_reading_process_output is called. It may execute user code,
5450 e.g. timers, that attempts to write new data to the same process.
5451 We must ensure that data is sent in the right order, and not
5452 interspersed half-completed with other writes (Bug#10815). This is
5453 handled by the write_queue element of struct process. It is a list
5454 with each entry having the form
5456 (string . (offset . length))
5458 where STRING is a lisp string, OFFSET is the offset into the
5459 string's byte sequence from which we should begin to send, and
5460 LENGTH is the number of bytes left to send. */
5462 /* Create a new entry in write_queue.
5463 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5464 BUF is a pointer to the string sequence of the input_obj or a C
5465 string in case of Qt or Qnil. */
5468 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5469 const char *buf
, ptrdiff_t len
, int front
)
5472 Lisp_Object entry
, obj
;
5474 if (STRINGP (input_obj
))
5476 offset
= buf
- SSDATA (input_obj
);
5482 obj
= make_unibyte_string (buf
, len
);
5485 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5488 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5490 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5493 /* Remove the first element in the write_queue of process P, put its
5494 contents in OBJ, BUF and LEN, and return non-zero. If the
5495 write_queue is empty, return zero. */
5498 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5499 const char **buf
, ptrdiff_t *len
)
5501 Lisp_Object entry
, offset_length
;
5504 if (NILP (p
->write_queue
))
5507 entry
= XCAR (p
->write_queue
);
5508 pset_write_queue (p
, XCDR (p
->write_queue
));
5510 *obj
= XCAR (entry
);
5511 offset_length
= XCDR (entry
);
5513 *len
= XINT (XCDR (offset_length
));
5514 offset
= XINT (XCAR (offset_length
));
5515 *buf
= SSDATA (*obj
) + offset
;
5520 /* Send some data to process PROC.
5521 BUF is the beginning of the data; LEN is the number of characters.
5522 OBJECT is the Lisp object that the data comes from. If OBJECT is
5523 nil or t, it means that the data comes from C string.
5525 If OBJECT is not nil, the data is encoded by PROC's coding-system
5526 for encoding before it is sent.
5528 This function can evaluate Lisp code and can garbage collect. */
5531 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5532 volatile ptrdiff_t len
, volatile Lisp_Object object
)
5534 /* Use volatile to protect variables from being clobbered by longjmp. */
5535 struct Lisp_Process
*p
= XPROCESS (proc
);
5537 struct coding_system
*coding
;
5538 void (*volatile old_sigpipe
) (int);
5540 if (p
->raw_status_new
)
5542 if (! EQ (p
->status
, Qrun
))
5543 error ("Process %s not running", SDATA (p
->name
));
5545 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5547 coding
= proc_encode_coding_system
[p
->outfd
];
5548 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5550 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5551 || (BUFFERP (object
)
5552 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5555 pset_encode_coding_system
5556 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5557 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5559 /* The coding system for encoding was changed to raw-text
5560 because we sent a unibyte text previously. Now we are
5561 sending a multibyte text, thus we must encode it by the
5562 original coding system specified for the current process.
5564 Another reason we come here is that the coding system
5565 was just complemented and a new one was returned by
5566 complement_process_encoding_system. */
5567 setup_coding_system (p
->encode_coding_system
, coding
);
5568 Vlast_coding_system_used
= p
->encode_coding_system
;
5570 coding
->src_multibyte
= 1;
5574 coding
->src_multibyte
= 0;
5575 /* For sending a unibyte text, character code conversion should
5576 not take place but EOL conversion should. So, setup raw-text
5577 or one of the subsidiary if we have not yet done it. */
5578 if (CODING_REQUIRE_ENCODING (coding
))
5580 if (CODING_REQUIRE_FLUSHING (coding
))
5582 /* But, before changing the coding, we must flush out data. */
5583 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5584 send_process (proc
, "", 0, Qt
);
5585 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5587 setup_coding_system (raw_text_coding_system
5588 (Vlast_coding_system_used
),
5590 coding
->src_multibyte
= 0;
5593 coding
->dst_multibyte
= 0;
5595 if (CODING_REQUIRE_ENCODING (coding
))
5597 coding
->dst_object
= Qt
;
5598 if (BUFFERP (object
))
5600 ptrdiff_t from_byte
, from
, to
;
5601 ptrdiff_t save_pt
, save_pt_byte
;
5602 struct buffer
*cur
= current_buffer
;
5604 set_buffer_internal (XBUFFER (object
));
5605 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5607 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5608 from
= BYTE_TO_CHAR (from_byte
);
5609 to
= BYTE_TO_CHAR (from_byte
+ len
);
5610 TEMP_SET_PT_BOTH (from
, from_byte
);
5611 encode_coding_object (coding
, object
, from
, from_byte
,
5612 to
, from_byte
+ len
, Qt
);
5613 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5614 set_buffer_internal (cur
);
5616 else if (STRINGP (object
))
5618 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5619 SBYTES (object
), Qt
);
5623 coding
->dst_object
= make_unibyte_string (buf
, len
);
5624 coding
->produced
= len
;
5627 len
= coding
->produced
;
5628 object
= coding
->dst_object
;
5629 buf
= SSDATA (object
);
5632 if (pty_max_bytes
== 0)
5634 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5635 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5636 if (pty_max_bytes
< 0)
5637 pty_max_bytes
= 250;
5639 pty_max_bytes
= 250;
5641 /* Deduct one, to leave space for the eof. */
5645 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5646 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5647 when returning with longjmp despite being declared volatile. */
5648 if (!setjmp (send_process_frame
))
5650 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5651 process_sent_to
= proc
;
5653 /* If there is already data in the write_queue, put the new data
5654 in the back of queue. Otherwise, ignore it. */
5655 if (!NILP (p
->write_queue
))
5656 write_queue_push (p
, object
, buf
, len
, 0);
5658 do /* while !NILP (p->write_queue) */
5660 ptrdiff_t cur_len
= -1;
5661 const char *cur_buf
;
5662 Lisp_Object cur_object
;
5664 /* If write_queue is empty, ignore it. */
5665 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5669 cur_object
= object
;
5674 /* Send this batch, using one or more write calls. */
5675 ptrdiff_t written
= 0;
5676 int outfd
= p
->outfd
;
5677 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5678 #ifdef DATAGRAM_SOCKETS
5679 if (DATAGRAM_CHAN_P (outfd
))
5681 rv
= sendto (outfd
, cur_buf
, cur_len
,
5682 0, datagram_address
[outfd
].sa
,
5683 datagram_address
[outfd
].len
);
5686 else if (errno
== EMSGSIZE
)
5688 signal (SIGPIPE
, old_sigpipe
);
5689 report_file_error ("sending datagram",
5690 Fcons (proc
, Qnil
));
5698 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5701 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5702 rv
= (written
? 0 : -1);
5703 #ifdef ADAPTIVE_READ_BUFFERING
5704 if (p
->read_output_delay
> 0
5705 && p
->adaptive_read_buffering
== 1)
5707 p
->read_output_delay
= 0;
5708 process_output_delay_count
--;
5709 p
->read_output_skip
= 0;
5713 signal (SIGPIPE
, old_sigpipe
);
5719 || errno
== EWOULDBLOCK
5725 /* Buffer is full. Wait, accepting input;
5726 that may allow the program
5727 to finish doing output and read more. */
5729 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5730 /* A gross hack to work around a bug in FreeBSD.
5731 In the following sequence, read(2) returns
5735 write(2) 954 bytes, get EAGAIN
5736 read(2) 1024 bytes in process_read_output
5737 read(2) 11 bytes in process_read_output
5739 That is, read(2) returns more bytes than have
5740 ever been written successfully. The 1033 bytes
5741 read are the 1022 bytes written successfully
5742 after processing (for example with CRs added if
5743 the terminal is set up that way which it is
5744 here). The same bytes will be seen again in a
5745 later read(2), without the CRs. */
5747 if (errno
== EAGAIN
)
5750 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5752 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5754 /* Put what we should have written in wait_queue. */
5755 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5756 wait_reading_process_output (0, 20 * 1000 * 1000,
5757 0, 0, Qnil
, NULL
, 0);
5758 /* Reread queue, to see what is left. */
5762 /* This is a real error. */
5763 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5769 while (!NILP (p
->write_queue
));
5773 signal (SIGPIPE
, old_sigpipe
);
5774 proc
= process_sent_to
;
5775 p
= XPROCESS (proc
);
5776 p
->raw_status_new
= 0;
5777 pset_status (p
, Fcons (Qexit
, Fcons (make_number (256), Qnil
)));
5778 p
->tick
= ++process_tick
;
5779 deactivate_process (proc
);
5780 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5784 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5786 doc
: /* Send current contents of region as input to PROCESS.
5787 PROCESS may be a process, a buffer, the name of a process or buffer, or
5788 nil, indicating the current buffer's process.
5789 Called from program, takes three arguments, PROCESS, START and END.
5790 If the region is more than 500 characters long,
5791 it is sent in several bunches. This may happen even for shorter regions.
5792 Output from processes can arrive in between bunches. */)
5793 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5796 ptrdiff_t start1
, end1
;
5798 proc
= get_process (process
);
5799 validate_region (&start
, &end
);
5801 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5802 move_gap (XINT (start
));
5804 start1
= CHAR_TO_BYTE (XINT (start
));
5805 end1
= CHAR_TO_BYTE (XINT (end
));
5806 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5807 Fcurrent_buffer ());
5812 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5814 doc
: /* Send PROCESS the contents of STRING as input.
5815 PROCESS may be a process, a buffer, the name of a process or buffer, or
5816 nil, indicating the current buffer's process.
5817 If STRING is more than 500 characters long,
5818 it is sent in several bunches. This may happen even for shorter strings.
5819 Output from processes can arrive in between bunches. */)
5820 (Lisp_Object process
, Lisp_Object string
)
5823 CHECK_STRING (string
);
5824 proc
= get_process (process
);
5825 send_process (proc
, SSDATA (string
),
5826 SBYTES (string
), string
);
5830 /* Return the foreground process group for the tty/pty that
5831 the process P uses. */
5833 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5838 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5841 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5842 master side. Try the slave side. */
5843 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5847 ioctl (fd
, TIOCGPGRP
, &gid
);
5851 #endif /* defined (TIOCGPGRP ) */
5856 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5857 Sprocess_running_child_p
, 0, 1, 0,
5858 doc
: /* Return t if PROCESS has given the terminal to a child.
5859 If the operating system does not make it possible to find out,
5860 return t unconditionally. */)
5861 (Lisp_Object process
)
5863 /* Initialize in case ioctl doesn't exist or gives an error,
5864 in a way that will cause returning t. */
5867 struct Lisp_Process
*p
;
5869 proc
= get_process (process
);
5870 p
= XPROCESS (proc
);
5872 if (!EQ (p
->type
, Qreal
))
5873 error ("Process %s is not a subprocess",
5876 error ("Process %s is not active",
5879 gid
= emacs_get_tty_pgrp (p
);
5886 /* send a signal number SIGNO to PROCESS.
5887 If CURRENT_GROUP is t, that means send to the process group
5888 that currently owns the terminal being used to communicate with PROCESS.
5889 This is used for various commands in shell mode.
5890 If CURRENT_GROUP is lambda, that means send to the process group
5891 that currently owns the terminal, but only if it is NOT the shell itself.
5893 If NOMSG is zero, insert signal-announcements into process's buffers
5896 If we can, we try to signal PROCESS by sending control characters
5897 down the pty. This allows us to signal inferiors who have changed
5898 their uid, for which killpg would return an EPERM error. */
5901 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5905 register struct Lisp_Process
*p
;
5909 proc
= get_process (process
);
5910 p
= XPROCESS (proc
);
5912 if (!EQ (p
->type
, Qreal
))
5913 error ("Process %s is not a subprocess",
5916 error ("Process %s is not active",
5920 current_group
= Qnil
;
5922 /* If we are using pgrps, get a pgrp number and make it negative. */
5923 if (NILP (current_group
))
5924 /* Send the signal to the shell's process group. */
5928 #ifdef SIGNALS_VIA_CHARACTERS
5929 /* If possible, send signals to the entire pgrp
5930 by sending an input character to it. */
5933 cc_t
*sig_char
= NULL
;
5935 tcgetattr (p
->infd
, &t
);
5940 sig_char
= &t
.c_cc
[VINTR
];
5944 sig_char
= &t
.c_cc
[VQUIT
];
5948 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5949 sig_char
= &t
.c_cc
[VSWTCH
];
5951 sig_char
= &t
.c_cc
[VSUSP
];
5956 if (sig_char
&& *sig_char
!= CDISABLE
)
5958 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5961 /* If we can't send the signal with a character,
5962 fall through and send it another way. */
5964 /* The code above may fall through if it can't
5965 handle the signal. */
5966 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5969 /* Get the current pgrp using the tty itself, if we have that.
5970 Otherwise, use the pty to get the pgrp.
5971 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5972 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5973 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5974 His patch indicates that if TIOCGPGRP returns an error, then
5975 we should just assume that p->pid is also the process group id. */
5977 gid
= emacs_get_tty_pgrp (p
);
5980 /* If we can't get the information, assume
5981 the shell owns the tty. */
5984 /* It is not clear whether anything really can set GID to -1.
5985 Perhaps on some system one of those ioctls can or could do so.
5986 Or perhaps this is vestigial. */
5989 #else /* ! defined (TIOCGPGRP ) */
5990 /* Can't select pgrps on this system, so we know that
5991 the child itself heads the pgrp. */
5993 #endif /* ! defined (TIOCGPGRP ) */
5995 /* If current_group is lambda, and the shell owns the terminal,
5996 don't send any signal. */
5997 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6005 p
->raw_status_new
= 0;
6006 pset_status (p
, Qrun
);
6007 p
->tick
= ++process_tick
;
6010 status_notify (NULL
);
6011 redisplay_preserve_echo_area (13);
6014 #endif /* ! defined (SIGCONT) */
6018 flush_pending_output (p
->infd
);
6022 /* If we don't have process groups, send the signal to the immediate
6023 subprocess. That isn't really right, but it's better than any
6024 obvious alternative. */
6027 kill (p
->pid
, signo
);
6031 /* gid may be a pid, or minus a pgrp's number */
6033 if (!NILP (current_group
))
6035 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6036 EMACS_KILLPG (gid
, signo
);
6043 #else /* ! defined (TIOCSIGSEND) */
6044 EMACS_KILLPG (gid
, signo
);
6045 #endif /* ! defined (TIOCSIGSEND) */
6048 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6049 doc
: /* Interrupt process PROCESS.
6050 PROCESS may be a process, a buffer, or the name of a process or buffer.
6051 No arg or nil means current buffer's process.
6052 Second arg CURRENT-GROUP non-nil means send signal to
6053 the current process-group of the process's controlling terminal
6054 rather than to the process's own process group.
6055 If the process is a shell, this means interrupt current subjob
6056 rather than the shell.
6058 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6059 don't send the signal. */)
6060 (Lisp_Object process
, Lisp_Object current_group
)
6062 process_send_signal (process
, SIGINT
, current_group
, 0);
6066 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6067 doc
: /* Kill process PROCESS. May be process or name of one.
6068 See function `interrupt-process' for more details on usage. */)
6069 (Lisp_Object process
, Lisp_Object current_group
)
6071 process_send_signal (process
, SIGKILL
, current_group
, 0);
6075 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6076 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6077 See function `interrupt-process' for more details on usage. */)
6078 (Lisp_Object process
, Lisp_Object current_group
)
6080 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6084 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6085 doc
: /* Stop process PROCESS. May be process or name of one.
6086 See function `interrupt-process' for more details on usage.
6087 If PROCESS is a network or serial process, inhibit handling of incoming
6089 (Lisp_Object process
, Lisp_Object current_group
)
6091 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6093 struct Lisp_Process
*p
;
6095 p
= XPROCESS (process
);
6096 if (NILP (p
->command
)
6099 FD_CLR (p
->infd
, &input_wait_mask
);
6100 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6102 pset_command (p
, Qt
);
6106 error ("No SIGTSTP support");
6108 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6113 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6114 doc
: /* Continue process PROCESS. May be process or name of one.
6115 See function `interrupt-process' for more details on usage.
6116 If PROCESS is a network or serial process, resume handling of incoming
6118 (Lisp_Object process
, Lisp_Object current_group
)
6120 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6122 struct Lisp_Process
*p
;
6124 p
= XPROCESS (process
);
6125 if (EQ (p
->command
, Qt
)
6127 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6129 FD_SET (p
->infd
, &input_wait_mask
);
6130 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6132 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6133 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6134 #else /* not WINDOWSNT */
6135 tcflush (p
->infd
, TCIFLUSH
);
6136 #endif /* not WINDOWSNT */
6138 pset_command (p
, Qnil
);
6142 process_send_signal (process
, SIGCONT
, current_group
, 0);
6144 error ("No SIGCONT support");
6149 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6150 2, 2, "sProcess (name or number): \nnSignal code: ",
6151 doc
: /* Send PROCESS the signal with code SIGCODE.
6152 PROCESS may also be a number specifying the process id of the
6153 process to signal; in this case, the process need not be a child of
6155 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6156 (Lisp_Object process
, Lisp_Object sigcode
)
6160 if (STRINGP (process
))
6162 Lisp_Object tem
= Fget_process (process
);
6165 Lisp_Object process_number
=
6166 string_to_number (SSDATA (process
), 10, 1);
6167 if (INTEGERP (process_number
) || FLOATP (process_number
))
6168 tem
= process_number
;
6172 else if (!NUMBERP (process
))
6173 process
= get_process (process
);
6178 if (NUMBERP (process
))
6179 CONS_TO_INTEGER (process
, pid_t
, pid
);
6182 CHECK_PROCESS (process
);
6183 pid
= XPROCESS (process
)->pid
;
6185 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6188 #define parse_signal(NAME, VALUE) \
6189 else if (!xstrcasecmp (name, NAME)) \
6190 XSETINT (sigcode, VALUE)
6192 if (INTEGERP (sigcode
))
6193 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6198 CHECK_SYMBOL (sigcode
);
6199 name
= SSDATA (SYMBOL_NAME (sigcode
));
6201 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6207 parse_signal ("usr1", SIGUSR1
);
6210 parse_signal ("usr2", SIGUSR2
);
6213 parse_signal ("term", SIGTERM
);
6216 parse_signal ("hup", SIGHUP
);
6219 parse_signal ("int", SIGINT
);
6222 parse_signal ("quit", SIGQUIT
);
6225 parse_signal ("ill", SIGILL
);
6228 parse_signal ("abrt", SIGABRT
);
6231 parse_signal ("emt", SIGEMT
);
6234 parse_signal ("kill", SIGKILL
);
6237 parse_signal ("fpe", SIGFPE
);
6240 parse_signal ("bus", SIGBUS
);
6243 parse_signal ("segv", SIGSEGV
);
6246 parse_signal ("sys", SIGSYS
);
6249 parse_signal ("pipe", SIGPIPE
);
6252 parse_signal ("alrm", SIGALRM
);
6255 parse_signal ("urg", SIGURG
);
6258 parse_signal ("stop", SIGSTOP
);
6261 parse_signal ("tstp", SIGTSTP
);
6264 parse_signal ("cont", SIGCONT
);
6267 parse_signal ("chld", SIGCHLD
);
6270 parse_signal ("ttin", SIGTTIN
);
6273 parse_signal ("ttou", SIGTTOU
);
6276 parse_signal ("io", SIGIO
);
6279 parse_signal ("xcpu", SIGXCPU
);
6282 parse_signal ("xfsz", SIGXFSZ
);
6285 parse_signal ("vtalrm", SIGVTALRM
);
6288 parse_signal ("prof", SIGPROF
);
6291 parse_signal ("winch", SIGWINCH
);
6294 parse_signal ("info", SIGINFO
);
6297 error ("Undefined signal name %s", name
);
6302 return make_number (kill (pid
, XINT (sigcode
)));
6305 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6306 doc
: /* Make PROCESS see end-of-file in its input.
6307 EOF comes after any text already sent to it.
6308 PROCESS may be a process, a buffer, the name of a process or buffer, or
6309 nil, indicating the current buffer's process.
6310 If PROCESS is a network connection, or is a process communicating
6311 through a pipe (as opposed to a pty), then you cannot send any more
6312 text to PROCESS after you call this function.
6313 If PROCESS is a serial process, wait until all output written to the
6314 process has been transmitted to the serial port. */)
6315 (Lisp_Object process
)
6318 struct coding_system
*coding
;
6320 if (DATAGRAM_CONN_P (process
))
6323 proc
= get_process (process
);
6324 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6326 /* Make sure the process is really alive. */
6327 if (XPROCESS (proc
)->raw_status_new
)
6328 update_status (XPROCESS (proc
));
6329 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6330 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6332 if (CODING_REQUIRE_FLUSHING (coding
))
6334 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6335 send_process (proc
, "", 0, Qnil
);
6338 if (XPROCESS (proc
)->pty_flag
)
6339 send_process (proc
, "\004", 1, Qnil
);
6340 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6343 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6344 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6345 #endif /* not WINDOWSNT */
6346 /* Do nothing on Windows because writes are blocking. */
6350 int old_outfd
, new_outfd
;
6352 #ifdef HAVE_SHUTDOWN
6353 /* If this is a network connection, or socketpair is used
6354 for communication with the subprocess, call shutdown to cause EOF.
6355 (In some old system, shutdown to socketpair doesn't work.
6356 Then we just can't win.) */
6357 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6358 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6359 shutdown (XPROCESS (proc
)->outfd
, 1);
6360 /* In case of socketpair, outfd == infd, so don't close it. */
6361 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6362 emacs_close (XPROCESS (proc
)->outfd
);
6363 #else /* not HAVE_SHUTDOWN */
6364 emacs_close (XPROCESS (proc
)->outfd
);
6365 #endif /* not HAVE_SHUTDOWN */
6366 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6369 old_outfd
= XPROCESS (proc
)->outfd
;
6371 if (!proc_encode_coding_system
[new_outfd
])
6372 proc_encode_coding_system
[new_outfd
]
6373 = xmalloc (sizeof (struct coding_system
));
6374 memcpy (proc_encode_coding_system
[new_outfd
],
6375 proc_encode_coding_system
[old_outfd
],
6376 sizeof (struct coding_system
));
6377 memset (proc_encode_coding_system
[old_outfd
], 0,
6378 sizeof (struct coding_system
));
6380 XPROCESS (proc
)->outfd
= new_outfd
;
6385 /* On receipt of a signal that a child status has changed, loop asking
6386 about children with changed statuses until the system says there
6389 All we do is change the status; we do not run sentinels or print
6390 notifications. That is saved for the next time keyboard input is
6391 done, in order to avoid timing errors.
6393 ** WARNING: this can be called during garbage collection.
6394 Therefore, it must not be fooled by the presence of mark bits in
6397 ** USG WARNING: Although it is not obvious from the documentation
6398 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6399 signal() before executing at least one wait(), otherwise the
6400 handler will be called again, resulting in an infinite loop. The
6401 relevant portion of the documentation reads "SIGCLD signals will be
6402 queued and the signal-catching function will be continually
6403 reentered until the queue is empty". Invoking signal() causes the
6404 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6407 ** Malloc WARNING: This should never call malloc either directly or
6408 indirectly; if it does, that is a bug */
6412 sigchld_handler (int signo
)
6414 int old_errno
= errno
;
6416 struct Lisp_Process
*p
;
6418 SIGNAL_THREAD_CHECK (signo
);
6429 #endif /* no WUNTRACED */
6430 /* Keep trying to get a status until we get a definitive result. */
6434 pid
= waitpid (-1, &w
, WNOHANG
| WUNTRACED
);
6436 while (pid
< 0 && errno
== EINTR
);
6440 /* PID == 0 means no processes found, PID == -1 means a real
6441 failure. We have done all our job, so return. */
6448 #endif /* no WNOHANG */
6450 /* Find the process that signaled us, and record its status. */
6452 /* The process can have been deleted by Fdelete_process. */
6453 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6455 Lisp_Object xpid
= XCAR (tail
);
6456 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6457 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6459 XSETCAR (tail
, Qnil
);
6460 goto sigchld_end_of_loop
;
6464 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6466 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6468 proc
= XCDR (XCAR (tail
));
6469 p
= XPROCESS (proc
);
6470 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6475 /* Look for an asynchronous process whose pid hasn't been filled
6478 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6480 proc
= XCDR (XCAR (tail
));
6481 p
= XPROCESS (proc
);
6487 /* Change the status of the process that was found. */
6490 int clear_desc_flag
= 0;
6492 p
->tick
= ++process_tick
;
6494 p
->raw_status_new
= 1;
6496 /* If process has terminated, stop waiting for its output. */
6497 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6499 clear_desc_flag
= 1;
6501 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6502 if (clear_desc_flag
)
6504 FD_CLR (p
->infd
, &input_wait_mask
);
6505 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6508 /* Tell wait_reading_process_output that it needs to wake up and
6510 if (input_available_clear_time
)
6511 *input_available_clear_time
= make_emacs_time (0, 0);
6514 /* There was no asynchronous process found for that pid: we have
6515 a synchronous process. */
6518 synch_process_alive
= 0;
6520 /* Report the status of the synchronous process. */
6522 synch_process_retcode
= WEXITSTATUS (w
);
6523 else if (WIFSIGNALED (w
))
6524 synch_process_termsig
= WTERMSIG (w
);
6526 /* Tell wait_reading_process_output that it needs to wake up and
6528 if (input_available_clear_time
)
6529 *input_available_clear_time
= make_emacs_time (0, 0);
6532 sigchld_end_of_loop
:
6535 /* On some systems, we must return right away.
6536 If any more processes want to signal us, we will
6538 Otherwise (on systems that have WNOHANG), loop around
6539 to use up all the processes that have something to tell us. */
6540 #if (defined WINDOWSNT \
6541 || (defined USG && !defined GNU_LINUX \
6542 && !(defined HPUX && defined WNOHANG)))
6545 #endif /* USG, but not HPUX with WNOHANG */
6548 #endif /* SIGCHLD */
6552 exec_sentinel_unwind (Lisp_Object data
)
6554 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6559 exec_sentinel_error_handler (Lisp_Object error_val
)
6561 cmd_error_internal (error_val
, "error in process sentinel: ");
6563 update_echo_area ();
6564 Fsleep_for (make_number (2), Qnil
);
6569 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6571 Lisp_Object sentinel
, odeactivate
;
6572 register struct Lisp_Process
*p
= XPROCESS (proc
);
6573 ptrdiff_t count
= SPECPDL_INDEX ();
6574 int outer_running_asynch_code
= running_asynch_code
;
6575 int waiting
= waiting_for_user_input_p
;
6577 if (inhibit_sentinels
)
6580 /* No need to gcpro these, because all we do with them later
6581 is test them for EQness, and none of them should be a string. */
6582 odeactivate
= Vdeactivate_mark
;
6584 Lisp_Object obuffer
, okeymap
;
6585 XSETBUFFER (obuffer
, current_buffer
);
6586 okeymap
= BVAR (current_buffer
, keymap
);
6589 /* There's no good reason to let sentinels change the current
6590 buffer, and many callers of accept-process-output, sit-for, and
6591 friends don't expect current-buffer to be changed from under them. */
6592 record_unwind_current_buffer ();
6594 sentinel
= p
->sentinel
;
6595 if (NILP (sentinel
))
6598 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6599 assure that it gets restored no matter how the sentinel exits. */
6600 pset_sentinel (p
, Qnil
);
6601 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6602 /* Inhibit quit so that random quits don't screw up a running filter. */
6603 specbind (Qinhibit_quit
, Qt
);
6604 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6606 /* In case we get recursively called,
6607 and we already saved the match data nonrecursively,
6608 save the same match data in safely recursive fashion. */
6609 if (outer_running_asynch_code
)
6612 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6613 restore_search_regs ();
6614 record_unwind_save_match_data ();
6615 Fset_match_data (tem
, Qt
);
6618 /* For speed, if a search happens within this code,
6619 save the match data in a special nonrecursive fashion. */
6620 running_asynch_code
= 1;
6622 internal_condition_case_1 (read_process_output_call
,
6624 Fcons (proc
, Fcons (reason
, Qnil
))),
6625 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6626 exec_sentinel_error_handler
);
6628 /* If we saved the match data nonrecursively, restore it now. */
6629 restore_search_regs ();
6630 running_asynch_code
= outer_running_asynch_code
;
6632 Vdeactivate_mark
= odeactivate
;
6634 /* Restore waiting_for_user_input_p as it was
6635 when we were called, in case the filter clobbered it. */
6636 waiting_for_user_input_p
= waiting
;
6639 if (! EQ (Fcurrent_buffer (), obuffer
)
6640 || ! EQ (current_buffer
->keymap
, okeymap
))
6642 /* But do it only if the caller is actually going to read events.
6643 Otherwise there's no need to make him wake up, and it could
6644 cause trouble (for example it would make sit_for return). */
6645 if (waiting_for_user_input_p
== -1)
6646 record_asynch_buffer_change ();
6648 unbind_to (count
, Qnil
);
6651 /* Report all recent events of a change in process status
6652 (either run the sentinel or output a message).
6653 This is usually done while Emacs is waiting for keyboard input
6654 but can be done at other times. */
6657 status_notify (struct Lisp_Process
*deleting_process
)
6659 register Lisp_Object proc
, buffer
;
6660 Lisp_Object tail
, msg
;
6661 struct gcpro gcpro1
, gcpro2
;
6665 /* We need to gcpro tail; if read_process_output calls a filter
6666 which deletes a process and removes the cons to which tail points
6667 from Vprocess_alist, and then causes a GC, tail is an unprotected
6671 /* Set this now, so that if new processes are created by sentinels
6672 that we run, we get called again to handle their status changes. */
6673 update_tick
= process_tick
;
6675 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6678 register struct Lisp_Process
*p
;
6680 proc
= Fcdr (XCAR (tail
));
6681 p
= XPROCESS (proc
);
6683 if (p
->tick
!= p
->update_tick
)
6685 p
->update_tick
= p
->tick
;
6687 /* If process is still active, read any output that remains. */
6688 while (! EQ (p
->filter
, Qt
)
6689 && ! EQ (p
->status
, Qconnect
)
6690 && ! EQ (p
->status
, Qlisten
)
6691 /* Network or serial process not stopped: */
6692 && ! EQ (p
->command
, Qt
)
6694 && p
!= deleting_process
6695 && read_process_output (proc
, p
->infd
) > 0);
6699 /* Get the text to use for the message. */
6700 if (p
->raw_status_new
)
6702 msg
= status_message (p
);
6704 /* If process is terminated, deactivate it or delete it. */
6706 if (CONSP (p
->status
))
6707 symbol
= XCAR (p
->status
);
6709 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6710 || EQ (symbol
, Qclosed
))
6712 if (delete_exited_processes
)
6713 remove_process (proc
);
6715 deactivate_process (proc
);
6718 /* The actions above may have further incremented p->tick.
6719 So set p->update_tick again
6720 so that an error in the sentinel will not cause
6721 this code to be run again. */
6722 p
->update_tick
= p
->tick
;
6723 /* Now output the message suitably. */
6724 if (!NILP (p
->sentinel
))
6725 exec_sentinel (proc
, msg
);
6726 /* Don't bother with a message in the buffer
6727 when a process becomes runnable. */
6728 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6731 struct buffer
*old
= current_buffer
;
6732 ptrdiff_t opoint
, opoint_byte
;
6733 ptrdiff_t before
, before_byte
;
6735 /* Avoid error if buffer is deleted
6736 (probably that's why the process is dead, too) */
6737 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6739 Fset_buffer (buffer
);
6742 opoint_byte
= PT_BYTE
;
6743 /* Insert new output into buffer
6744 at the current end-of-output marker,
6745 thus preserving logical ordering of input and output. */
6746 if (XMARKER (p
->mark
)->buffer
)
6747 Fgoto_char (p
->mark
);
6749 SET_PT_BOTH (ZV
, ZV_BYTE
);
6752 before_byte
= PT_BYTE
;
6754 tem
= BVAR (current_buffer
, read_only
);
6755 bset_read_only (current_buffer
, Qnil
);
6756 insert_string ("\nProcess ");
6757 { /* FIXME: temporary kludge */
6758 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6759 insert_string (" ");
6761 bset_read_only (current_buffer
, tem
);
6762 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6764 if (opoint
>= before
)
6765 SET_PT_BOTH (opoint
+ (PT
- before
),
6766 opoint_byte
+ (PT_BYTE
- before_byte
));
6768 SET_PT_BOTH (opoint
, opoint_byte
);
6770 set_buffer_internal (old
);
6775 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6780 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6781 Sset_process_coding_system
, 1, 3, 0,
6782 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6783 DECODING will be used to decode subprocess output and ENCODING to
6784 encode subprocess input. */)
6785 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6787 register struct Lisp_Process
*p
;
6789 CHECK_PROCESS (process
);
6790 p
= XPROCESS (process
);
6792 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6794 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6795 Fcheck_coding_system (decoding
);
6796 Fcheck_coding_system (encoding
);
6797 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6798 pset_decode_coding_system (p
, decoding
);
6799 pset_encode_coding_system (p
, encoding
);
6800 setup_process_coding_systems (process
);
6805 DEFUN ("process-coding-system",
6806 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6807 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6808 (register Lisp_Object process
)
6810 CHECK_PROCESS (process
);
6811 return Fcons (XPROCESS (process
)->decode_coding_system
,
6812 XPROCESS (process
)->encode_coding_system
);
6815 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6816 Sset_process_filter_multibyte
, 2, 2, 0,
6817 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6818 If FLAG is non-nil, the filter is given multibyte strings.
6819 If FLAG is nil, the filter is given unibyte strings. In this case,
6820 all character code conversion except for end-of-line conversion is
6822 (Lisp_Object process
, Lisp_Object flag
)
6824 register struct Lisp_Process
*p
;
6826 CHECK_PROCESS (process
);
6827 p
= XPROCESS (process
);
6829 pset_decode_coding_system
6830 (p
, raw_text_coding_system (p
->decode_coding_system
));
6831 setup_process_coding_systems (process
);
6836 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6837 Sprocess_filter_multibyte_p
, 1, 1, 0,
6838 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6839 (Lisp_Object process
)
6841 register struct Lisp_Process
*p
;
6842 struct coding_system
*coding
;
6844 CHECK_PROCESS (process
);
6845 p
= XPROCESS (process
);
6846 coding
= proc_decode_coding_system
[p
->infd
];
6847 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6856 add_gpm_wait_descriptor (int desc
)
6858 add_keyboard_wait_descriptor (desc
);
6862 delete_gpm_wait_descriptor (int desc
)
6864 delete_keyboard_wait_descriptor (desc
);
6871 /* Return nonzero if *MASK has a bit set
6872 that corresponds to one of the keyboard input descriptors. */
6875 keyboard_bit_set (fd_set
*mask
)
6879 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6880 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6881 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6888 #else /* not subprocesses */
6890 /* Defined on msdos.c. */
6891 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6892 EMACS_TIME
*, void *);
6894 /* Implementation of wait_reading_process_output, assuming that there
6895 are no subprocesses. Used only by the MS-DOS build.
6897 Wait for timeout to elapse and/or keyboard input to be available.
6901 If negative, gobble data immediately available but don't wait for any.
6904 an additional duration to wait, measured in nanoseconds
6905 If TIME_LIMIT is zero, then:
6906 If NSECS == 0, there is no limit.
6907 If NSECS > 0, the timeout consists of NSECS only.
6908 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6911 0 to ignore keyboard input, or
6912 1 to return when input is available, or
6913 -1 means caller will actually read the input, so don't throw to
6916 see full version for other parameters. We know that wait_proc will
6917 always be NULL, since `subprocesses' isn't defined.
6919 DO_DISPLAY != 0 means redisplay should be done to show subprocess
6920 output that arrives.
6922 Return true if we received input from any process. */
6925 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6927 Lisp_Object wait_for_cell
,
6928 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6931 EMACS_TIME end_time
, timeout
;
6938 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6939 time_limit
= TYPE_MAXIMUM (time_t);
6941 /* What does time_limit really mean? */
6942 if (time_limit
|| 0 < nsecs
)
6944 timeout
= make_emacs_time (time_limit
, nsecs
);
6945 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6948 /* Turn off periodic alarms (in case they are in use)
6949 and then turn off any other atimers,
6950 because the select emulator uses alarms. */
6952 turn_on_atimers (0);
6956 int timeout_reduced_for_timers
= 0;
6957 SELECT_TYPE waitchannels
;
6960 /* If calling from keyboard input, do not quit
6961 since we want to return C-g as an input character.
6962 Otherwise, do pending quit if requested. */
6966 /* Exit now if the cell we're waiting for became non-nil. */
6967 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6970 /* Compute time from now till when time limit is up */
6971 /* Exit if already run out */
6974 /* A negative timeout means
6975 gobble output available now
6976 but don't wait at all. */
6978 timeout
= make_emacs_time (0, 0);
6980 else if (time_limit
|| 0 < nsecs
)
6982 EMACS_TIME now
= current_emacs_time ();
6983 if (EMACS_TIME_LE (end_time
, now
))
6985 timeout
= sub_emacs_time (end_time
, now
);
6989 timeout
= make_emacs_time (100000, 0);
6992 /* If our caller will not immediately handle keyboard events,
6993 run timer events directly.
6994 (Callers that will immediately read keyboard events
6995 call timer_delay on their own.) */
6996 if (NILP (wait_for_cell
))
6998 EMACS_TIME timer_delay
;
7002 int old_timers_run
= timers_run
;
7003 timer_delay
= timer_check ();
7004 if (timers_run
!= old_timers_run
&& do_display
)
7005 /* We must retry, since a timer may have requeued itself
7006 and that could alter the time delay. */
7007 redisplay_preserve_echo_area (14);
7011 while (!detect_input_pending ());
7013 /* If there is unread keyboard input, also return. */
7015 && requeued_events_pending_p ())
7018 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
7020 if (EMACS_TIME_LT (timer_delay
, timeout
))
7022 timeout
= timer_delay
;
7023 timeout_reduced_for_timers
= 1;
7028 /* Cause C-g and alarm signals to take immediate action,
7029 and cause input available signals to zero out timeout. */
7031 set_waiting_for_input (&timeout
);
7033 /* If a frame has been newly mapped and needs updating,
7034 reprocess its display stuff. */
7035 if (frame_garbaged
&& do_display
)
7037 clear_waiting_for_input ();
7038 redisplay_preserve_echo_area (15);
7040 set_waiting_for_input (&timeout
);
7043 /* Wait till there is something to do. */
7044 FD_ZERO (&waitchannels
);
7045 if (read_kbd
&& detect_input_pending ())
7049 if (read_kbd
|| !NILP (wait_for_cell
))
7050 FD_SET (0, &waitchannels
);
7051 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
7056 /* Make C-g and alarm signals set flags again */
7057 clear_waiting_for_input ();
7059 /* If we woke up due to SIGWINCH, actually change size now. */
7060 do_pending_window_change (0);
7062 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
7063 /* We waited the full specified time, so return now. */
7068 /* If the system call was interrupted, then go around the
7070 if (xerrno
== EINTR
)
7071 FD_ZERO (&waitchannels
);
7073 error ("select error: %s", emacs_strerror (xerrno
));
7076 /* Check for keyboard input */
7079 && detect_input_pending_run_timers (do_display
))
7081 swallow_events (do_display
);
7082 if (detect_input_pending_run_timers (do_display
))
7086 /* If there is unread keyboard input, also return. */
7088 && requeued_events_pending_p ())
7091 /* If wait_for_cell. check for keyboard input
7092 but don't run any timers.
7093 ??? (It seems wrong to me to check for keyboard
7094 input at all when wait_for_cell, but the code
7095 has been this way since July 1994.
7096 Try changing this after version 19.31.) */
7097 if (! NILP (wait_for_cell
)
7098 && detect_input_pending ())
7100 swallow_events (do_display
);
7101 if (detect_input_pending ())
7105 /* Exit now if the cell we're waiting for became non-nil. */
7106 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7115 #endif /* not subprocesses */
7117 /* The following functions are needed even if async subprocesses are
7118 not supported. Some of them are no-op stubs in that case. */
7120 /* Add DESC to the set of keyboard input descriptors. */
7123 add_keyboard_wait_descriptor (int desc
)
7125 #ifdef subprocesses /* actually means "not MSDOS" */
7126 FD_SET (desc
, &input_wait_mask
);
7127 FD_SET (desc
, &non_process_wait_mask
);
7128 if (desc
> max_input_desc
)
7129 max_input_desc
= desc
;
7133 /* From now on, do not expect DESC to give keyboard input. */
7136 delete_keyboard_wait_descriptor (int desc
)
7140 int lim
= max_input_desc
;
7142 FD_CLR (desc
, &input_wait_mask
);
7143 FD_CLR (desc
, &non_process_wait_mask
);
7145 if (desc
== max_input_desc
)
7146 for (fd
= 0; fd
< lim
; fd
++)
7147 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7148 max_input_desc
= fd
;
7152 /* Setup coding systems of PROCESS. */
7155 setup_process_coding_systems (Lisp_Object process
)
7158 struct Lisp_Process
*p
= XPROCESS (process
);
7160 int outch
= p
->outfd
;
7161 Lisp_Object coding_system
;
7163 if (inch
< 0 || outch
< 0)
7166 if (!proc_decode_coding_system
[inch
])
7167 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7168 coding_system
= p
->decode_coding_system
;
7169 if (! NILP (p
->filter
))
7171 else if (BUFFERP (p
->buffer
))
7173 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7174 coding_system
= raw_text_coding_system (coding_system
);
7176 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7178 if (!proc_encode_coding_system
[outch
])
7179 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7180 setup_coding_system (p
->encode_coding_system
,
7181 proc_encode_coding_system
[outch
]);
7185 /* Close all descriptors currently in use for communication
7186 with subprocess. This is used in a newly-forked subprocess
7187 to get rid of irrelevant descriptors. */
7190 close_process_descs (void)
7194 for (i
= 0; i
< MAXDESC
; i
++)
7196 Lisp_Object process
;
7197 process
= chan_process
[i
];
7198 if (!NILP (process
))
7200 int in
= XPROCESS (process
)->infd
;
7201 int out
= XPROCESS (process
)->outfd
;
7204 if (out
>= 0 && in
!= out
)
7211 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7212 doc
: /* Return the (or a) process associated with BUFFER.
7213 BUFFER may be a buffer or the name of one. */)
7214 (register Lisp_Object buffer
)
7217 register Lisp_Object buf
, tail
, proc
;
7219 if (NILP (buffer
)) return Qnil
;
7220 buf
= Fget_buffer (buffer
);
7221 if (NILP (buf
)) return Qnil
;
7223 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7225 proc
= Fcdr (XCAR (tail
));
7226 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7229 #endif /* subprocesses */
7233 DEFUN ("process-inherit-coding-system-flag",
7234 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7236 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7237 If this flag is t, `buffer-file-coding-system' of the buffer
7238 associated with PROCESS will inherit the coding system used to decode
7239 the process output. */)
7240 (register Lisp_Object process
)
7243 CHECK_PROCESS (process
);
7244 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7246 /* Ignore the argument and return the value of
7247 inherit-process-coding-system. */
7248 return inherit_process_coding_system
? Qt
: Qnil
;
7252 /* Kill all processes associated with `buffer'.
7253 If `buffer' is nil, kill all processes */
7256 kill_buffer_processes (Lisp_Object buffer
)
7259 Lisp_Object tail
, proc
;
7261 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7263 proc
= XCDR (XCAR (tail
));
7265 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7267 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7268 Fdelete_process (proc
);
7269 else if (XPROCESS (proc
)->infd
>= 0)
7270 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7273 #else /* subprocesses */
7274 /* Since we have no subprocesses, this does nothing. */
7275 #endif /* subprocesses */
7278 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7279 Swaiting_for_user_input_p
, 0, 0, 0,
7280 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7281 This is intended for use by asynchronous process output filters and sentinels. */)
7285 return (waiting_for_user_input_p
? Qt
: Qnil
);
7291 /* Stop reading input from keyboard sources. */
7294 hold_keyboard_input (void)
7299 /* Resume reading input from keyboard sources. */
7302 unhold_keyboard_input (void)
7307 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7310 kbd_on_hold_p (void)
7312 return kbd_is_on_hold
;
7316 /* Enumeration of and access to system processes a-la ps(1). */
7318 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7320 doc
: /* Return a list of numerical process IDs of all running processes.
7321 If this functionality is unsupported, return nil.
7323 See `process-attributes' for getting attributes of a process given its ID. */)
7326 return list_system_processes ();
7329 DEFUN ("process-attributes", Fprocess_attributes
,
7330 Sprocess_attributes
, 1, 1, 0,
7331 doc
: /* Return attributes of the process given by its PID, a number.
7333 Value is an alist where each element is a cons cell of the form
7337 If this functionality is unsupported, the value is nil.
7339 See `list-system-processes' for getting a list of all process IDs.
7341 The KEYs of the attributes that this function may return are listed
7342 below, together with the type of the associated VALUE (in parentheses).
7343 Not all platforms support all of these attributes; unsupported
7344 attributes will not appear in the returned alist.
7345 Unless explicitly indicated otherwise, numbers can have either
7346 integer or floating point values.
7348 euid -- Effective user User ID of the process (number)
7349 user -- User name corresponding to euid (string)
7350 egid -- Effective user Group ID of the process (number)
7351 group -- Group name corresponding to egid (string)
7352 comm -- Command name (executable name only) (string)
7353 state -- Process state code, such as "S", "R", or "T" (string)
7354 ppid -- Parent process ID (number)
7355 pgrp -- Process group ID (number)
7356 sess -- Session ID, i.e. process ID of session leader (number)
7357 ttname -- Controlling tty name (string)
7358 tpgid -- ID of foreground process group on the process's tty (number)
7359 minflt -- number of minor page faults (number)
7360 majflt -- number of major page faults (number)
7361 cminflt -- cumulative number of minor page faults (number)
7362 cmajflt -- cumulative number of major page faults (number)
7363 utime -- user time used by the process, in (current-time) format,
7364 which is a list of integers (HIGH LOW USEC PSEC)
7365 stime -- system time used by the process (current-time)
7366 time -- sum of utime and stime (current-time)
7367 cutime -- user time used by the process and its children (current-time)
7368 cstime -- system time used by the process and its children (current-time)
7369 ctime -- sum of cutime and cstime (current-time)
7370 pri -- priority of the process (number)
7371 nice -- nice value of the process (number)
7372 thcount -- process thread count (number)
7373 start -- time the process started (current-time)
7374 vsize -- virtual memory size of the process in KB's (number)
7375 rss -- resident set size of the process in KB's (number)
7376 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7377 pcpu -- percents of CPU time used by the process (floating-point number)
7378 pmem -- percents of total physical memory used by process's resident set
7379 (floating-point number)
7380 args -- command line which invoked the process (string). */)
7383 return system_process_attributes (pid
);
7387 /* This is not called "init_process" because that is the name of a
7388 Mach system call, so it would cause problems on Darwin systems. */
7390 init_process_emacs (void)
7395 inhibit_sentinels
= 0;
7399 if (! noninteractive
|| initialized
)
7401 signal (SIGCHLD
, sigchld_handler
);
7404 FD_ZERO (&input_wait_mask
);
7405 FD_ZERO (&non_keyboard_wait_mask
);
7406 FD_ZERO (&non_process_wait_mask
);
7407 FD_ZERO (&write_mask
);
7408 max_process_desc
= 0;
7409 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7411 #ifdef NON_BLOCKING_CONNECT
7412 FD_ZERO (&connect_wait_mask
);
7413 num_pending_connects
= 0;
7416 #ifdef ADAPTIVE_READ_BUFFERING
7417 process_output_delay_count
= 0;
7418 process_output_skip
= 0;
7421 /* Don't do this, it caused infinite select loops. The display
7422 method should call add_keyboard_wait_descriptor on stdin if it
7425 FD_SET (0, &input_wait_mask
);
7428 Vprocess_alist
= Qnil
;
7430 deleted_pid_list
= Qnil
;
7432 for (i
= 0; i
< MAXDESC
; i
++)
7434 chan_process
[i
] = Qnil
;
7435 proc_buffered_char
[i
] = -1;
7437 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7438 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7439 #ifdef DATAGRAM_SOCKETS
7440 memset (datagram_address
, 0, sizeof datagram_address
);
7444 Lisp_Object subfeatures
= Qnil
;
7445 const struct socket_options
*sopt
;
7447 #define ADD_SUBFEATURE(key, val) \
7448 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7450 #ifdef NON_BLOCKING_CONNECT
7451 ADD_SUBFEATURE (QCnowait
, Qt
);
7453 #ifdef DATAGRAM_SOCKETS
7454 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7456 #ifdef HAVE_SEQPACKET
7457 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7459 #ifdef HAVE_LOCAL_SOCKETS
7460 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7462 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7464 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7466 #ifdef HAVE_GETSOCKNAME
7467 ADD_SUBFEATURE (QCservice
, Qt
);
7469 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7470 ADD_SUBFEATURE (QCserver
, Qt
);
7473 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7474 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7476 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7479 #if defined (DARWIN_OS)
7480 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7481 processes. As such, we only change the default value. */
7484 char const *release
= (STRINGP (Voperating_system_release
)
7485 ? SSDATA (Voperating_system_release
)
7487 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7488 Vprocess_connection_type
= Qnil
;
7492 #endif /* subprocesses */
7497 syms_of_process (void)
7501 DEFSYM (Qprocessp
, "processp");
7502 DEFSYM (Qrun
, "run");
7503 DEFSYM (Qstop
, "stop");
7504 DEFSYM (Qsignal
, "signal");
7506 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7509 Qexit = intern_c_string ("exit");
7510 staticpro (&Qexit); */
7512 DEFSYM (Qopen
, "open");
7513 DEFSYM (Qclosed
, "closed");
7514 DEFSYM (Qconnect
, "connect");
7515 DEFSYM (Qfailed
, "failed");
7516 DEFSYM (Qlisten
, "listen");
7517 DEFSYM (Qlocal
, "local");
7518 DEFSYM (Qipv4
, "ipv4");
7520 DEFSYM (Qipv6
, "ipv6");
7522 DEFSYM (Qdatagram
, "datagram");
7523 DEFSYM (Qseqpacket
, "seqpacket");
7525 DEFSYM (QCport
, ":port");
7526 DEFSYM (QCspeed
, ":speed");
7527 DEFSYM (QCprocess
, ":process");
7529 DEFSYM (QCbytesize
, ":bytesize");
7530 DEFSYM (QCstopbits
, ":stopbits");
7531 DEFSYM (QCparity
, ":parity");
7532 DEFSYM (Qodd
, "odd");
7533 DEFSYM (Qeven
, "even");
7534 DEFSYM (QCflowcontrol
, ":flowcontrol");
7537 DEFSYM (QCsummary
, ":summary");
7539 DEFSYM (Qreal
, "real");
7540 DEFSYM (Qnetwork
, "network");
7541 DEFSYM (Qserial
, "serial");
7542 DEFSYM (QCbuffer
, ":buffer");
7543 DEFSYM (QChost
, ":host");
7544 DEFSYM (QCservice
, ":service");
7545 DEFSYM (QClocal
, ":local");
7546 DEFSYM (QCremote
, ":remote");
7547 DEFSYM (QCcoding
, ":coding");
7548 DEFSYM (QCserver
, ":server");
7549 DEFSYM (QCnowait
, ":nowait");
7550 DEFSYM (QCsentinel
, ":sentinel");
7551 DEFSYM (QClog
, ":log");
7552 DEFSYM (QCnoquery
, ":noquery");
7553 DEFSYM (QCstop
, ":stop");
7554 DEFSYM (QCoptions
, ":options");
7555 DEFSYM (QCplist
, ":plist");
7557 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7559 staticpro (&Vprocess_alist
);
7561 staticpro (&deleted_pid_list
);
7564 #endif /* subprocesses */
7566 DEFSYM (QCname
, ":name");
7567 DEFSYM (QCtype
, ":type");
7569 DEFSYM (Qeuid
, "euid");
7570 DEFSYM (Qegid
, "egid");
7571 DEFSYM (Quser
, "user");
7572 DEFSYM (Qgroup
, "group");
7573 DEFSYM (Qcomm
, "comm");
7574 DEFSYM (Qstate
, "state");
7575 DEFSYM (Qppid
, "ppid");
7576 DEFSYM (Qpgrp
, "pgrp");
7577 DEFSYM (Qsess
, "sess");
7578 DEFSYM (Qttname
, "ttname");
7579 DEFSYM (Qtpgid
, "tpgid");
7580 DEFSYM (Qminflt
, "minflt");
7581 DEFSYM (Qmajflt
, "majflt");
7582 DEFSYM (Qcminflt
, "cminflt");
7583 DEFSYM (Qcmajflt
, "cmajflt");
7584 DEFSYM (Qutime
, "utime");
7585 DEFSYM (Qstime
, "stime");
7586 DEFSYM (Qtime
, "time");
7587 DEFSYM (Qcutime
, "cutime");
7588 DEFSYM (Qcstime
, "cstime");
7589 DEFSYM (Qctime
, "ctime");
7590 DEFSYM (Qpri
, "pri");
7591 DEFSYM (Qnice
, "nice");
7592 DEFSYM (Qthcount
, "thcount");
7593 DEFSYM (Qstart
, "start");
7594 DEFSYM (Qvsize
, "vsize");
7595 DEFSYM (Qrss
, "rss");
7596 DEFSYM (Qetime
, "etime");
7597 DEFSYM (Qpcpu
, "pcpu");
7598 DEFSYM (Qpmem
, "pmem");
7599 DEFSYM (Qargs
, "args");
7601 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7602 doc
: /* Non-nil means delete processes immediately when they exit.
7603 A value of nil means don't delete them until `list-processes' is run. */);
7605 delete_exited_processes
= 1;
7608 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7609 doc
: /* Control type of device used to communicate with subprocesses.
7610 Values are nil to use a pipe, or t or `pty' to use a pty.
7611 The value has no effect if the system has no ptys or if all ptys are busy:
7612 then a pipe is used in any case.
7613 The value takes effect when `start-process' is called. */);
7614 Vprocess_connection_type
= Qt
;
7616 #ifdef ADAPTIVE_READ_BUFFERING
7617 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7618 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7619 On some systems, when Emacs reads the output from a subprocess, the output data
7620 is read in very small blocks, potentially resulting in very poor performance.
7621 This behavior can be remedied to some extent by setting this variable to a
7622 non-nil value, as it will automatically delay reading from such processes, to
7623 allow them to produce more output before Emacs tries to read it.
7624 If the value is t, the delay is reset after each write to the process; any other
7625 non-nil value means that the delay is not reset on write.
7626 The variable takes effect when `start-process' is called. */);
7627 Vprocess_adaptive_read_buffering
= Qt
;
7630 defsubr (&Sprocessp
);
7631 defsubr (&Sget_process
);
7632 defsubr (&Sdelete_process
);
7633 defsubr (&Sprocess_status
);
7634 defsubr (&Sprocess_exit_status
);
7635 defsubr (&Sprocess_id
);
7636 defsubr (&Sprocess_name
);
7637 defsubr (&Sprocess_tty_name
);
7638 defsubr (&Sprocess_command
);
7639 defsubr (&Sset_process_buffer
);
7640 defsubr (&Sprocess_buffer
);
7641 defsubr (&Sprocess_mark
);
7642 defsubr (&Sset_process_filter
);
7643 defsubr (&Sprocess_filter
);
7644 defsubr (&Sset_process_sentinel
);
7645 defsubr (&Sprocess_sentinel
);
7646 defsubr (&Sset_process_window_size
);
7647 defsubr (&Sset_process_inherit_coding_system_flag
);
7648 defsubr (&Sset_process_query_on_exit_flag
);
7649 defsubr (&Sprocess_query_on_exit_flag
);
7650 defsubr (&Sprocess_contact
);
7651 defsubr (&Sprocess_plist
);
7652 defsubr (&Sset_process_plist
);
7653 defsubr (&Sprocess_list
);
7654 defsubr (&Sstart_process
);
7655 defsubr (&Sserial_process_configure
);
7656 defsubr (&Smake_serial_process
);
7657 defsubr (&Sset_network_process_option
);
7658 defsubr (&Smake_network_process
);
7659 defsubr (&Sformat_network_address
);
7660 #if defined (HAVE_NET_IF_H)
7662 defsubr (&Snetwork_interface_list
);
7664 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7665 defsubr (&Snetwork_interface_info
);
7667 #endif /* defined (HAVE_NET_IF_H) */
7668 #ifdef DATAGRAM_SOCKETS
7669 defsubr (&Sprocess_datagram_address
);
7670 defsubr (&Sset_process_datagram_address
);
7672 defsubr (&Saccept_process_output
);
7673 defsubr (&Sprocess_send_region
);
7674 defsubr (&Sprocess_send_string
);
7675 defsubr (&Sinterrupt_process
);
7676 defsubr (&Skill_process
);
7677 defsubr (&Squit_process
);
7678 defsubr (&Sstop_process
);
7679 defsubr (&Scontinue_process
);
7680 defsubr (&Sprocess_running_child_p
);
7681 defsubr (&Sprocess_send_eof
);
7682 defsubr (&Ssignal_process
);
7683 defsubr (&Swaiting_for_user_input_p
);
7684 defsubr (&Sprocess_type
);
7685 defsubr (&Sset_process_coding_system
);
7686 defsubr (&Sprocess_coding_system
);
7687 defsubr (&Sset_process_filter_multibyte
);
7688 defsubr (&Sprocess_filter_multibyte_p
);
7690 #endif /* subprocesses */
7692 defsubr (&Sget_buffer_process
);
7693 defsubr (&Sprocess_inherit_coding_system_flag
);
7694 defsubr (&Slist_system_processes
);
7695 defsubr (&Sprocess_attributes
);