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
28 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
36 /* Only MS-DOS does not define `subprocesses'. */
39 #include <sys/socket.h>
41 #include <netinet/in.h>
42 #include <arpa/inet.h>
44 /* Are local (unix) sockets supported? */
45 #if defined (HAVE_SYS_UN_H)
46 #if !defined (AF_LOCAL) && defined (AF_UNIX)
47 #define AF_LOCAL AF_UNIX
50 #define HAVE_LOCAL_SOCKETS
55 #include <sys/ioctl.h>
56 #if defined (HAVE_NET_IF_H)
58 #endif /* HAVE_NET_IF_H */
60 #if defined (HAVE_IFADDRS_H)
61 /* Must be after net/if.h */
64 /* We only use structs from this header when we use getifaddrs. */
65 #if defined (HAVE_NET_IF_DL_H)
66 #include <net/if_dl.h>
76 # include <sys/stream.h>
77 # include <sys/stropts.h>
81 #include <netinet/in.h>
82 #include <arpa/nameser.h>
94 #endif /* subprocesses */
100 #include "character.h"
105 #include "termhooks.h"
106 #include "termopts.h"
107 #include "commands.h"
108 #include "keyboard.h"
109 #include "blockinput.h"
110 #include "dispextern.h"
111 #include "composite.h"
113 #include "sysselect.h"
114 #include "syssignal.h"
120 #ifdef HAVE_WINDOW_SYSTEM
122 #endif /* HAVE_WINDOW_SYSTEM */
124 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
125 #include "xgselect.h"
130 # define waitpid(pid, status, options) wait (status)
136 /* Work around GCC 4.7.0 bug with strict overflow checking; see
137 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
138 These lines can be removed once the GCC bug is fixed. */
139 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
140 # pragma GCC diagnostic ignored "-Wstrict-overflow"
143 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
144 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
145 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
146 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
147 Lisp_Object QCname
, QCtype
;
149 /* Non-zero if keyboard input is on hold, zero otherwise. */
151 static int kbd_is_on_hold
;
153 /* Nonzero means don't run process sentinels. This is used
155 int inhibit_sentinels
;
159 Lisp_Object Qprocessp
;
160 static Lisp_Object Qrun
, Qstop
, Qsignal
;
161 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
163 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
164 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
166 static Lisp_Object Qipv6
;
168 static Lisp_Object QCport
, QCprocess
;
170 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
171 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
172 static Lisp_Object QCbuffer
, QChost
, QCservice
;
173 static Lisp_Object QClocal
, QCremote
, QCcoding
;
174 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
175 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
176 static Lisp_Object Qlast_nonmenu_event
;
178 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
179 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
180 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
181 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
187 /* Number of events of change of status of a process. */
188 static EMACS_INT process_tick
;
189 /* Number of events for which the user or sentinel has been notified. */
190 static EMACS_INT update_tick
;
192 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
194 /* Only W32 has this, it really means that select can't take write mask. */
195 #ifdef BROKEN_NON_BLOCKING_CONNECT
196 #undef NON_BLOCKING_CONNECT
197 #define SELECT_CANT_DO_WRITE_MASK
199 #ifndef NON_BLOCKING_CONNECT
201 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
202 #if defined (O_NONBLOCK) || defined (O_NDELAY)
203 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
204 #define NON_BLOCKING_CONNECT
205 #endif /* EWOULDBLOCK || EINPROGRESS */
206 #endif /* O_NONBLOCK || O_NDELAY */
207 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
208 #endif /* HAVE_SELECT */
209 #endif /* NON_BLOCKING_CONNECT */
210 #endif /* BROKEN_NON_BLOCKING_CONNECT */
212 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
213 this system. We need to read full packets, so we need a
214 "non-destructive" select. So we require either native select,
215 or emulation of select using FIONREAD. */
217 #ifndef BROKEN_DATAGRAM_SOCKETS
218 # if defined HAVE_SELECT || defined USABLE_FIONREAD
219 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
220 # define DATAGRAM_SOCKETS
225 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
226 # define HAVE_SEQPACKET
229 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
230 #define ADAPTIVE_READ_BUFFERING
233 #ifdef ADAPTIVE_READ_BUFFERING
234 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
235 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
236 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
238 /* Number of processes which have a non-zero read_output_delay,
239 and therefore might be delayed for adaptive read buffering. */
241 static int process_output_delay_count
;
243 /* Non-zero if any process has non-nil read_output_skip. */
245 static int process_output_skip
;
248 #define process_output_delay_count 0
251 static void create_process (Lisp_Object
, char **, Lisp_Object
);
253 static int keyboard_bit_set (SELECT_TYPE
*);
255 static void deactivate_process (Lisp_Object
);
256 static void status_notify (struct Lisp_Process
*);
257 static int read_process_output (Lisp_Object
, int);
258 static void create_pty (Lisp_Object
);
260 /* If we support a window system, turn on the code to poll periodically
261 to detect C-g. It isn't actually used when doing interrupt input. */
262 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
263 #define POLL_FOR_INPUT
266 static Lisp_Object
get_process (register Lisp_Object name
);
267 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
269 /* Mask of bits indicating the descriptors that we wait for input on. */
271 static SELECT_TYPE input_wait_mask
;
273 /* Mask that excludes keyboard input descriptor(s). */
275 static SELECT_TYPE non_keyboard_wait_mask
;
277 /* Mask that excludes process input descriptor(s). */
279 static SELECT_TYPE non_process_wait_mask
;
281 /* Mask for selecting for write. */
283 static SELECT_TYPE write_mask
;
285 #ifdef NON_BLOCKING_CONNECT
286 /* Mask of bits indicating the descriptors that we wait for connect to
287 complete on. Once they complete, they are removed from this mask
288 and added to the input_wait_mask and non_keyboard_wait_mask. */
290 static SELECT_TYPE connect_wait_mask
;
292 /* Number of bits set in connect_wait_mask. */
293 static int num_pending_connects
;
294 #endif /* NON_BLOCKING_CONNECT */
296 /* The largest descriptor currently in use for a process object. */
297 static int max_process_desc
;
299 /* The largest descriptor currently in use for input. */
300 static int max_input_desc
;
302 /* Indexed by descriptor, gives the process (if any) for that descriptor */
303 static Lisp_Object chan_process
[MAXDESC
];
305 /* Alist of elements (NAME . PROCESS) */
306 static Lisp_Object Vprocess_alist
;
308 /* Buffered-ahead input char from process, indexed by channel.
309 -1 means empty (no char is buffered).
310 Used on sys V where the only way to tell if there is any
311 output from the process is to read at least one char.
312 Always -1 on systems that support FIONREAD. */
314 static int proc_buffered_char
[MAXDESC
];
316 /* Table of `struct coding-system' for each process. */
317 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
318 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
320 #ifdef DATAGRAM_SOCKETS
321 /* Table of `partner address' for datagram sockets. */
322 static struct sockaddr_and_len
{
325 } datagram_address
[MAXDESC
];
326 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
327 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
329 #define DATAGRAM_CHAN_P(chan) (0)
330 #define DATAGRAM_CONN_P(proc) (0)
333 /* Maximum number of bytes to send to a pty without an eof. */
334 static int pty_max_bytes
;
336 /* These setters are used only in this file, so they can be private. */
338 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
343 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
348 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
350 p
->decode_coding_system
= val
;
353 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
355 p
->decoding_buf
= val
;
358 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
360 p
->encode_coding_system
= val
;
363 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
365 p
->encoding_buf
= val
;
368 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
373 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
378 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
383 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
388 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
393 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
398 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
403 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
408 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
413 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
415 p
->write_queue
= val
;
420 static struct fd_callback_data
426 int condition
; /* mask of the defines above. */
427 } fd_callback_info
[MAXDESC
];
430 /* Add a file descriptor FD to be monitored for when read is possible.
431 When read is possible, call FUNC with argument DATA. */
434 add_read_fd (int fd
, fd_callback func
, void *data
)
436 eassert (fd
< MAXDESC
);
437 add_keyboard_wait_descriptor (fd
);
439 fd_callback_info
[fd
].func
= func
;
440 fd_callback_info
[fd
].data
= data
;
441 fd_callback_info
[fd
].condition
|= FOR_READ
;
444 /* Stop monitoring file descriptor FD for when read is possible. */
447 delete_read_fd (int fd
)
449 eassert (fd
< MAXDESC
);
450 delete_keyboard_wait_descriptor (fd
);
452 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
453 if (fd_callback_info
[fd
].condition
== 0)
455 fd_callback_info
[fd
].func
= 0;
456 fd_callback_info
[fd
].data
= 0;
460 /* Add a file descriptor FD to be monitored for when write is possible.
461 When write is possible, call FUNC with argument DATA. */
464 add_write_fd (int fd
, fd_callback func
, void *data
)
466 eassert (fd
< MAXDESC
);
467 FD_SET (fd
, &write_mask
);
468 if (fd
> max_input_desc
)
471 fd_callback_info
[fd
].func
= func
;
472 fd_callback_info
[fd
].data
= data
;
473 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
476 /* Stop monitoring file descriptor FD for when write is possible. */
479 delete_write_fd (int fd
)
481 int lim
= max_input_desc
;
483 eassert (fd
< MAXDESC
);
484 FD_CLR (fd
, &write_mask
);
485 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
486 if (fd_callback_info
[fd
].condition
== 0)
488 fd_callback_info
[fd
].func
= 0;
489 fd_callback_info
[fd
].data
= 0;
491 if (fd
== max_input_desc
)
492 for (fd
= lim
; fd
>= 0; fd
--)
493 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
503 /* Compute the Lisp form of the process status, p->status, from
504 the numeric status that was returned by `wait'. */
506 static Lisp_Object
status_convert (int);
509 update_status (struct Lisp_Process
*p
)
511 eassert (p
->raw_status_new
);
512 pset_status (p
, status_convert (p
->raw_status
));
513 p
->raw_status_new
= 0;
516 /* Convert a process status word in Unix format to
517 the list that we use internally. */
520 status_convert (int w
)
523 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
524 else if (WIFEXITED (w
))
525 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
526 WCOREDUMP (w
) ? Qt
: Qnil
));
527 else if (WIFSIGNALED (w
))
528 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
529 WCOREDUMP (w
) ? Qt
: Qnil
));
534 /* Given a status-list, extract the three pieces of information
535 and store them individually through the three pointers. */
538 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
552 *code
= XFASTINT (XCAR (tem
));
554 *coredump
= !NILP (tem
);
558 /* Return a string describing a process status list. */
561 status_message (struct Lisp_Process
*p
)
563 Lisp_Object status
= p
->status
;
566 Lisp_Object string
, string2
;
568 decode_status (status
, &symbol
, &code
, &coredump
);
570 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
573 synchronize_system_messages_locale ();
574 signame
= strsignal (code
);
576 string
= build_string ("unknown");
581 string
= build_unibyte_string (signame
);
582 if (! NILP (Vlocale_coding_system
))
583 string
= (code_convert_string_norecord
584 (string
, Vlocale_coding_system
, 0));
585 c1
= STRING_CHAR (SDATA (string
));
588 Faset (string
, make_number (0), make_number (c2
));
590 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
591 return concat2 (string
, string2
);
593 else if (EQ (symbol
, Qexit
))
596 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
598 return build_string ("finished\n");
599 string
= Fnumber_to_string (make_number (code
));
600 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
601 return concat3 (build_string ("exited abnormally with code "),
604 else if (EQ (symbol
, Qfailed
))
606 string
= Fnumber_to_string (make_number (code
));
607 string2
= build_string ("\n");
608 return concat3 (build_string ("failed with code "),
612 return Fcopy_sequence (Fsymbol_name (symbol
));
617 /* The file name of the pty opened by allocate_pty. */
618 static char pty_name
[24];
620 /* Open an available pty, returning a file descriptor.
621 Return -1 on failure.
622 The file name of the terminal corresponding to the pty
623 is left in the variable pty_name. */
634 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
635 for (i
= 0; i
< 16; i
++)
638 #ifdef PTY_NAME_SPRINTF
641 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
642 #endif /* no PTY_NAME_SPRINTF */
646 #else /* no PTY_OPEN */
648 { /* Some systems name their pseudoterminals so that there are gaps in
649 the usual sequence - for example, on HP9000/S700 systems, there
650 are no pseudoterminals with names ending in 'f'. So we wait for
651 three failures in a row before deciding that we've reached the
653 int failed_count
= 0;
656 if (stat (pty_name
, &stb
) < 0)
659 if (failed_count
>= 3)
666 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
668 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
671 #endif /* no PTY_OPEN */
675 /* check to make certain that both sides are available
676 this avoids a nasty yet stupid bug in rlogins */
677 #ifdef PTY_TTY_NAME_SPRINTF
680 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
681 #endif /* no PTY_TTY_NAME_SPRINTF */
682 if (access (pty_name
, 6) != 0)
697 #endif /* HAVE_PTYS */
700 make_process (Lisp_Object name
)
702 register Lisp_Object val
, tem
, name1
;
703 register struct Lisp_Process
*p
;
704 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
707 p
= allocate_process ();
708 /* Initialize Lisp data. Note that allocate_process initializes all
709 Lisp data to nil, so do it only for slots which should not be nil. */
710 pset_status (p
, Qrun
);
711 pset_mark (p
, Fmake_marker ());
713 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
714 non-Lisp data, so do it only for slots which should not be zero. */
719 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
722 /* If name is already in use, modify it until it is unused. */
727 tem
= Fget_process (name1
);
728 if (NILP (tem
)) break;
729 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
733 XSETPROCESS (val
, p
);
734 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
739 remove_process (register Lisp_Object proc
)
741 register Lisp_Object pair
;
743 pair
= Frassq (proc
, Vprocess_alist
);
744 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
746 deactivate_process (proc
);
750 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
751 doc
: /* Return t if OBJECT is a process. */)
754 return PROCESSP (object
) ? Qt
: Qnil
;
757 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
758 doc
: /* Return the process named NAME, or nil if there is none. */)
759 (register Lisp_Object name
)
764 return Fcdr (Fassoc (name
, Vprocess_alist
));
767 /* This is how commands for the user decode process arguments. It
768 accepts a process, a process name, a buffer, a buffer name, or nil.
769 Buffers denote the first process in the buffer, and nil denotes the
773 get_process (register Lisp_Object name
)
775 register Lisp_Object proc
, obj
;
778 obj
= Fget_process (name
);
780 obj
= Fget_buffer (name
);
782 error ("Process %s does not exist", SDATA (name
));
784 else if (NILP (name
))
785 obj
= Fcurrent_buffer ();
789 /* Now obj should be either a buffer object or a process object.
793 proc
= Fget_buffer_process (obj
);
795 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
807 /* Fdelete_process promises to immediately forget about the process, but in
808 reality, Emacs needs to remember those processes until they have been
809 treated by the SIGCHLD handler; otherwise this handler would consider the
810 process as being synchronous and say that the synchronous process is
812 static Lisp_Object deleted_pid_list
;
815 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
816 doc
: /* Delete PROCESS: kill it and forget about it immediately.
817 PROCESS may be a process, a buffer, the name of a process or buffer, or
818 nil, indicating the current buffer's process. */)
819 (register Lisp_Object process
)
821 register struct Lisp_Process
*p
;
823 process
= get_process (process
);
824 p
= XPROCESS (process
);
826 p
->raw_status_new
= 0;
827 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
829 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
830 p
->tick
= ++process_tick
;
832 redisplay_preserve_echo_area (13);
834 else if (p
->infd
>= 0)
840 /* No problem storing the pid here, as it is still in Vprocess_alist. */
841 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
842 /* GC treated elements set to nil. */
843 Fdelq (Qnil
, deleted_pid_list
));
844 /* If the process has already signaled, remove it from the list. */
845 if (p
->raw_status_new
)
848 if (CONSP (p
->status
))
849 symbol
= XCAR (p
->status
);
850 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
852 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
856 Fkill_process (process
, Qnil
);
857 /* Do this now, since remove_process will make the
858 SIGCHLD handler do nothing. */
859 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
860 p
->tick
= ++process_tick
;
862 redisplay_preserve_echo_area (13);
865 remove_process (process
);
869 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
870 doc
: /* Return the status of PROCESS.
871 The returned value is one of the following symbols:
872 run -- for a process that is running.
873 stop -- for a process stopped but continuable.
874 exit -- for a process that has exited.
875 signal -- for a process that has got a fatal signal.
876 open -- for a network stream connection that is open.
877 listen -- for a network stream server that is listening.
878 closed -- for a network stream connection that is closed.
879 connect -- when waiting for a non-blocking connection to complete.
880 failed -- when a non-blocking connection has failed.
881 nil -- if arg is a process name and no such process exists.
882 PROCESS may be a process, a buffer, the name of a process, or
883 nil, indicating the current buffer's process. */)
884 (register Lisp_Object process
)
886 register struct Lisp_Process
*p
;
887 register Lisp_Object status
;
889 if (STRINGP (process
))
890 process
= Fget_process (process
);
892 process
= get_process (process
);
897 p
= XPROCESS (process
);
898 if (p
->raw_status_new
)
902 status
= XCAR (status
);
903 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
905 if (EQ (status
, Qexit
))
907 else if (EQ (p
->command
, Qt
))
909 else if (EQ (status
, Qrun
))
915 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
917 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
918 If PROCESS has not yet exited or died, return 0. */)
919 (register Lisp_Object process
)
921 CHECK_PROCESS (process
);
922 if (XPROCESS (process
)->raw_status_new
)
923 update_status (XPROCESS (process
));
924 if (CONSP (XPROCESS (process
)->status
))
925 return XCAR (XCDR (XPROCESS (process
)->status
));
926 return make_number (0);
929 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
930 doc
: /* Return the process id of PROCESS.
931 This is the pid of the external process which PROCESS uses or talks to.
932 For a network connection, this value is nil. */)
933 (register Lisp_Object process
)
937 CHECK_PROCESS (process
);
938 pid
= XPROCESS (process
)->pid
;
939 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
942 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
943 doc
: /* Return the name of PROCESS, as a string.
944 This is the name of the program invoked in PROCESS,
945 possibly modified to make it unique among process names. */)
946 (register Lisp_Object process
)
948 CHECK_PROCESS (process
);
949 return XPROCESS (process
)->name
;
952 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
953 doc
: /* Return the command that was executed to start PROCESS.
954 This is a list of strings, the first string being the program executed
955 and the rest of the strings being the arguments given to it.
956 For a network or serial process, this is nil (process is running) or t
957 \(process is stopped). */)
958 (register Lisp_Object process
)
960 CHECK_PROCESS (process
);
961 return XPROCESS (process
)->command
;
964 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
965 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
966 This is the terminal that the process itself reads and writes on,
967 not the name of the pty that Emacs uses to talk with that terminal. */)
968 (register Lisp_Object process
)
970 CHECK_PROCESS (process
);
971 return XPROCESS (process
)->tty_name
;
974 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
976 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
978 (register Lisp_Object process
, Lisp_Object buffer
)
980 struct Lisp_Process
*p
;
982 CHECK_PROCESS (process
);
984 CHECK_BUFFER (buffer
);
985 p
= XPROCESS (process
);
986 pset_buffer (p
, buffer
);
987 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
988 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
989 setup_process_coding_systems (process
);
993 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
995 doc
: /* Return the buffer PROCESS is associated with.
996 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
997 (register Lisp_Object process
)
999 CHECK_PROCESS (process
);
1000 return XPROCESS (process
)->buffer
;
1003 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
1005 doc
: /* Return the marker for the end of the last output from PROCESS. */)
1006 (register Lisp_Object process
)
1008 CHECK_PROCESS (process
);
1009 return XPROCESS (process
)->mark
;
1012 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1014 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1015 A value of t means stop accepting output from the process.
1017 When a process has a filter, its buffer is not used for output.
1018 Instead, each time it does output, the entire string of output is
1019 passed to the filter.
1021 The filter gets two arguments: the process and the string of output.
1022 The string argument is normally a multibyte string, except:
1023 - if the process' input coding system is no-conversion or raw-text,
1024 it is a unibyte string (the non-converted input), or else
1025 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1026 string (the result of converting the decoded input multibyte
1027 string to unibyte with `string-make-unibyte'). */)
1028 (register Lisp_Object process
, Lisp_Object filter
)
1030 struct Lisp_Process
*p
;
1032 CHECK_PROCESS (process
);
1033 p
= XPROCESS (process
);
1035 /* Don't signal an error if the process' input file descriptor
1036 is closed. This could make debugging Lisp more difficult,
1037 for example when doing something like
1039 (setq process (start-process ...))
1041 (set-process-filter process ...) */
1045 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1047 FD_CLR (p
->infd
, &input_wait_mask
);
1048 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1050 else if (EQ (p
->filter
, Qt
)
1051 /* Network or serial process not stopped: */
1052 && !EQ (p
->command
, Qt
))
1054 FD_SET (p
->infd
, &input_wait_mask
);
1055 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1059 pset_filter (p
, filter
);
1060 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1061 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1062 setup_process_coding_systems (process
);
1066 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1068 doc
: /* Returns the filter function of PROCESS; nil if none.
1069 See `set-process-filter' for more info on filter functions. */)
1070 (register Lisp_Object process
)
1072 CHECK_PROCESS (process
);
1073 return XPROCESS (process
)->filter
;
1076 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1078 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1079 The sentinel is called as a function when the process changes state.
1080 It gets two arguments: the process, and a string describing the change. */)
1081 (register Lisp_Object process
, Lisp_Object sentinel
)
1083 struct Lisp_Process
*p
;
1085 CHECK_PROCESS (process
);
1086 p
= XPROCESS (process
);
1088 pset_sentinel (p
, sentinel
);
1089 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1090 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1094 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1096 doc
: /* Return the sentinel of PROCESS; nil if none.
1097 See `set-process-sentinel' for more info on sentinels. */)
1098 (register Lisp_Object process
)
1100 CHECK_PROCESS (process
);
1101 return XPROCESS (process
)->sentinel
;
1104 DEFUN ("set-process-window-size", Fset_process_window_size
,
1105 Sset_process_window_size
, 3, 3, 0,
1106 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1107 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1109 CHECK_PROCESS (process
);
1110 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1111 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1113 if (XPROCESS (process
)->infd
< 0
1114 || set_window_size (XPROCESS (process
)->infd
,
1115 XINT (height
), XINT (width
)) <= 0)
1121 DEFUN ("set-process-inherit-coding-system-flag",
1122 Fset_process_inherit_coding_system_flag
,
1123 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1124 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1125 If the second argument FLAG is non-nil, then the variable
1126 `buffer-file-coding-system' of the buffer associated with PROCESS
1127 will be bound to the value of the coding system used to decode
1130 This is useful when the coding system specified for the process buffer
1131 leaves either the character code conversion or the end-of-line conversion
1132 unspecified, or if the coding system used to decode the process output
1133 is more appropriate for saving the process buffer.
1135 Binding the variable `inherit-process-coding-system' to non-nil before
1136 starting the process is an alternative way of setting the inherit flag
1137 for the process which will run.
1139 This function returns FLAG. */)
1140 (register Lisp_Object process
, Lisp_Object flag
)
1142 CHECK_PROCESS (process
);
1143 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1147 DEFUN ("set-process-query-on-exit-flag",
1148 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1150 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1151 If the second argument FLAG is non-nil, Emacs will query the user before
1152 exiting or killing a buffer if PROCESS is running. This function
1154 (register Lisp_Object process
, Lisp_Object flag
)
1156 CHECK_PROCESS (process
);
1157 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1161 DEFUN ("process-query-on-exit-flag",
1162 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1164 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1165 (register Lisp_Object process
)
1167 CHECK_PROCESS (process
);
1168 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1171 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1173 doc
: /* Return the contact info of PROCESS; t for a real child.
1174 For a network or serial connection, the value depends on the optional
1175 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1176 SERVICE) for a network connection or (PORT SPEED) for a serial
1177 connection. If KEY is t, the complete contact information for the
1178 connection is returned, else the specific value for the keyword KEY is
1179 returned. See `make-network-process' or `make-serial-process' for a
1180 list of keywords. */)
1181 (register Lisp_Object process
, Lisp_Object key
)
1183 Lisp_Object contact
;
1185 CHECK_PROCESS (process
);
1186 contact
= XPROCESS (process
)->childp
;
1188 #ifdef DATAGRAM_SOCKETS
1189 if (DATAGRAM_CONN_P (process
)
1190 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1191 contact
= Fplist_put (contact
, QCremote
,
1192 Fprocess_datagram_address (process
));
1195 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1197 if (NILP (key
) && NETCONN_P (process
))
1198 return Fcons (Fplist_get (contact
, QChost
),
1199 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1200 if (NILP (key
) && SERIALCONN_P (process
))
1201 return Fcons (Fplist_get (contact
, QCport
),
1202 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1203 return Fplist_get (contact
, key
);
1206 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1208 doc
: /* Return the plist of PROCESS. */)
1209 (register Lisp_Object process
)
1211 CHECK_PROCESS (process
);
1212 return XPROCESS (process
)->plist
;
1215 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1217 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1218 (register Lisp_Object process
, Lisp_Object plist
)
1220 CHECK_PROCESS (process
);
1223 pset_plist (XPROCESS (process
), plist
);
1227 #if 0 /* Turned off because we don't currently record this info
1228 in the process. Perhaps add it. */
1229 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1230 doc
: /* Return the connection type of PROCESS.
1231 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1232 a socket connection. */)
1233 (Lisp_Object process
)
1235 return XPROCESS (process
)->type
;
1239 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1240 doc
: /* Return the connection type of PROCESS.
1241 The value is either the symbol `real', `network', or `serial'.
1242 PROCESS may be a process, a buffer, the name of a process or buffer, or
1243 nil, indicating the current buffer's process. */)
1244 (Lisp_Object process
)
1247 proc
= get_process (process
);
1248 return XPROCESS (proc
)->type
;
1251 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1253 doc
: /* Convert network ADDRESS from internal format to a string.
1254 A 4 or 5 element vector represents an IPv4 address (with port number).
1255 An 8 or 9 element vector represents an IPv6 address (with port number).
1256 If optional second argument OMIT-PORT is non-nil, don't include a port
1257 number in the string, even when present in ADDRESS.
1258 Returns nil if format of ADDRESS is invalid. */)
1259 (Lisp_Object address
, Lisp_Object omit_port
)
1264 if (STRINGP (address
)) /* AF_LOCAL */
1267 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1269 register struct Lisp_Vector
*p
= XVECTOR (address
);
1270 ptrdiff_t size
= p
->header
.size
;
1271 Lisp_Object args
[10];
1274 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1276 args
[0] = build_string ("%d.%d.%d.%d");
1281 args
[0] = build_string ("%d.%d.%d.%d:%d");
1284 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1286 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1291 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1297 for (i
= 0; i
< nargs
; i
++)
1299 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1302 if (nargs
<= 5 /* IPv4 */
1303 && i
< 4 /* host, not port */
1304 && XINT (p
->contents
[i
]) > 255)
1307 args
[i
+1] = p
->contents
[i
];
1310 return Fformat (nargs
+1, args
);
1313 if (CONSP (address
))
1315 Lisp_Object args
[2];
1316 args
[0] = build_string ("<Family %d>");
1317 args
[1] = Fcar (address
);
1318 return Fformat (2, args
);
1324 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1325 doc
: /* Return a list of all processes. */)
1328 return Fmapcar (Qcdr
, Vprocess_alist
);
1331 /* Starting asynchronous inferior processes. */
1333 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1335 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1336 doc
: /* Start a program in a subprocess. Return the process object for it.
1337 NAME is name for process. It is modified if necessary to make it unique.
1338 BUFFER is the buffer (or buffer name) to associate with the process.
1340 Process output (both standard output and standard error streams) goes
1341 at end of BUFFER, unless you specify an output stream or filter
1342 function to handle the output. BUFFER may also be nil, meaning that
1343 this process is not associated with any buffer.
1345 PROGRAM is the program file name. It is searched for in `exec-path'
1346 (which see). If nil, just associate a pty with the buffer. Remaining
1347 arguments are strings to give program as arguments.
1349 If you want to separate standard output from standard error, invoke
1350 the command through a shell and redirect one of them using the shell
1353 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1354 (ptrdiff_t nargs
, Lisp_Object
*args
)
1356 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1357 register unsigned char **new_argv
;
1359 ptrdiff_t count
= SPECPDL_INDEX ();
1363 buffer
= Fget_buffer_create (buffer
);
1365 /* Make sure that the child will be able to chdir to the current
1366 buffer's current directory, or its unhandled equivalent. We
1367 can't just have the child check for an error when it does the
1368 chdir, since it's in a vfork.
1370 We have to GCPRO around this because Fexpand_file_name and
1371 Funhandled_file_name_directory might call a file name handling
1372 function. The argument list is protected by the caller, so all
1373 we really have to worry about is buffer. */
1375 struct gcpro gcpro1
, gcpro2
;
1377 current_dir
= BVAR (current_buffer
, directory
);
1379 GCPRO2 (buffer
, current_dir
);
1381 current_dir
= Funhandled_file_name_directory (current_dir
);
1382 if (NILP (current_dir
))
1383 /* If the file name handler says that current_dir is unreachable, use
1384 a sensible default. */
1385 current_dir
= build_string ("~/");
1386 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1387 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1388 report_file_error ("Setting current directory",
1389 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1395 CHECK_STRING (name
);
1399 if (!NILP (program
))
1400 CHECK_STRING (program
);
1402 proc
= make_process (name
);
1403 /* If an error occurs and we can't start the process, we want to
1404 remove it from the process list. This means that each error
1405 check in create_process doesn't need to call remove_process
1406 itself; it's all taken care of here. */
1407 record_unwind_protect (start_process_unwind
, proc
);
1409 pset_childp (XPROCESS (proc
), Qt
);
1410 pset_plist (XPROCESS (proc
), Qnil
);
1411 pset_type (XPROCESS (proc
), Qreal
);
1412 pset_buffer (XPROCESS (proc
), buffer
);
1413 pset_sentinel (XPROCESS (proc
), Qnil
);
1414 pset_filter (XPROCESS (proc
), Qnil
);
1415 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1418 /* AKA GNUTLS_INITSTAGE(proc). */
1419 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1420 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1423 #ifdef ADAPTIVE_READ_BUFFERING
1424 XPROCESS (proc
)->adaptive_read_buffering
1425 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1426 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1429 /* Make the process marker point into the process buffer (if any). */
1430 if (BUFFERP (buffer
))
1431 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1432 BUF_ZV (XBUFFER (buffer
)),
1433 BUF_ZV_BYTE (XBUFFER (buffer
)));
1436 /* Decide coding systems for communicating with the process. Here
1437 we don't setup the structure coding_system nor pay attention to
1438 unibyte mode. They are done in create_process. */
1440 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1441 Lisp_Object coding_systems
= Qt
;
1442 Lisp_Object val
, *args2
;
1443 struct gcpro gcpro1
, gcpro2
;
1445 val
= Vcoding_system_for_read
;
1448 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1449 args2
[0] = Qstart_process
;
1450 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1451 GCPRO2 (proc
, current_dir
);
1452 if (!NILP (program
))
1453 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1455 if (CONSP (coding_systems
))
1456 val
= XCAR (coding_systems
);
1457 else if (CONSP (Vdefault_process_coding_system
))
1458 val
= XCAR (Vdefault_process_coding_system
);
1460 pset_decode_coding_system (XPROCESS (proc
), val
);
1462 val
= Vcoding_system_for_write
;
1465 if (EQ (coding_systems
, Qt
))
1467 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1468 args2
[0] = Qstart_process
;
1469 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1470 GCPRO2 (proc
, current_dir
);
1471 if (!NILP (program
))
1472 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1475 if (CONSP (coding_systems
))
1476 val
= XCDR (coding_systems
);
1477 else if (CONSP (Vdefault_process_coding_system
))
1478 val
= XCDR (Vdefault_process_coding_system
);
1480 pset_encode_coding_system (XPROCESS (proc
), val
);
1481 /* Note: At this moment, the above coding system may leave
1482 text-conversion or eol-conversion unspecified. They will be
1483 decided after we read output from the process and decode it by
1484 some coding system, or just before we actually send a text to
1489 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1490 XPROCESS (proc
)->decoding_carryover
= 0;
1491 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1493 XPROCESS (proc
)->inherit_coding_system_flag
1494 = !(NILP (buffer
) || !inherit_process_coding_system
);
1496 if (!NILP (program
))
1498 /* If program file name is not absolute, search our path for it.
1499 Put the name we will really use in TEM. */
1500 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1501 && !(SCHARS (program
) > 1
1502 && IS_DEVICE_SEP (SREF (program
, 1))))
1504 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1507 GCPRO4 (name
, program
, buffer
, current_dir
);
1508 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1511 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1512 tem
= Fexpand_file_name (tem
, Qnil
);
1516 if (!NILP (Ffile_directory_p (program
)))
1517 error ("Specified program for new process is a directory");
1521 /* If program file name starts with /: for quoting a magic name,
1523 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1524 && SREF (tem
, 1) == ':')
1525 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1528 Lisp_Object arg_encoding
= Qnil
;
1529 struct gcpro gcpro1
;
1532 /* Encode the file name and put it in NEW_ARGV.
1533 That's where the child will use it to execute the program. */
1534 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1536 /* Here we encode arguments by the coding system used for sending
1537 data to the process. We don't support using different coding
1538 systems for encoding arguments and for encoding data sent to the
1541 for (i
= 3; i
< nargs
; i
++)
1543 tem
= Fcons (args
[i
], tem
);
1544 CHECK_STRING (XCAR (tem
));
1545 if (STRING_MULTIBYTE (XCAR (tem
)))
1547 if (NILP (arg_encoding
))
1548 arg_encoding
= (complement_process_encoding_system
1549 (XPROCESS (proc
)->encode_coding_system
));
1551 code_convert_string_norecord
1552 (XCAR (tem
), arg_encoding
, 1));
1559 /* Now that everything is encoded we can collect the strings into
1561 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1562 new_argv
[nargs
- 2] = 0;
1564 for (i
= nargs
- 2; i
-- != 0; )
1566 new_argv
[i
] = SDATA (XCAR (tem
));
1570 create_process (proc
, (char **) new_argv
, current_dir
);
1575 return unbind_to (count
, proc
);
1578 /* This function is the unwind_protect form for Fstart_process. If
1579 PROC doesn't have its pid set, then we know someone has signaled
1580 an error and the process wasn't started successfully, so we should
1581 remove it from the process list. */
1583 start_process_unwind (Lisp_Object proc
)
1585 if (!PROCESSP (proc
))
1588 /* Was PROC started successfully?
1589 -2 is used for a pty with no process, eg for gdb. */
1590 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1591 remove_process (proc
);
1597 create_process_1 (struct atimer
*timer
)
1599 /* Nothing to do. */
1604 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1606 int inchannel
, outchannel
;
1609 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1610 int wait_child_setup
[2];
1612 sigset_t blocked
, procmask
;
1613 struct sigaction sigint_action
;
1614 struct sigaction sigquit_action
;
1615 struct sigaction sigpipe_action
;
1617 struct sigaction sighup_action
;
1619 /* Use volatile to protect variables from being clobbered by longjmp. */
1620 volatile int forkin
, forkout
;
1621 volatile int pty_flag
= 0;
1623 inchannel
= outchannel
= -1;
1626 if (!NILP (Vprocess_connection_type
))
1627 outchannel
= inchannel
= allocate_pty ();
1631 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1632 /* On most USG systems it does not work to open the pty's tty here,
1633 then close it and reopen it in the child. */
1635 /* Don't let this terminal become our controlling terminal
1636 (in case we don't have one). */
1637 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1639 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1642 report_file_error ("Opening pty", Qnil
);
1644 forkin
= forkout
= -1;
1645 #endif /* not USG, or USG_SUBTTY_WORKS */
1649 #endif /* HAVE_PTYS */
1654 report_file_error ("Creating pipe", Qnil
);
1660 emacs_close (inchannel
);
1661 emacs_close (forkout
);
1662 report_file_error ("Creating pipe", Qnil
);
1668 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1672 tem
= pipe (wait_child_setup
);
1674 report_file_error ("Creating pipe", Qnil
);
1675 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1677 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1680 emacs_close (wait_child_setup
[0]);
1681 emacs_close (wait_child_setup
[1]);
1682 report_file_error ("Setting file descriptor flags", Qnil
);
1688 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1689 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1692 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1693 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1697 /* Record this as an active process, with its channels.
1698 As a result, child_setup will close Emacs's side of the pipes. */
1699 chan_process
[inchannel
] = process
;
1700 XPROCESS (process
)->infd
= inchannel
;
1701 XPROCESS (process
)->outfd
= outchannel
;
1703 /* Previously we recorded the tty descriptor used in the subprocess.
1704 It was only used for getting the foreground tty process, so now
1705 we just reopen the device (see emacs_get_tty_pgrp) as this is
1706 more portable (see USG_SUBTTY_WORKS above). */
1708 XPROCESS (process
)->pty_flag
= pty_flag
;
1709 pset_status (XPROCESS (process
), Qrun
);
1711 /* Delay interrupts until we have a chance to store
1712 the new fork's pid in its process structure */
1713 sigemptyset (&blocked
);
1715 sigaddset (&blocked
, SIGCHLD
);
1717 #ifdef HAVE_WORKING_VFORK
1718 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1719 this sets the parent's signal handlers as well as the child's.
1720 So delay all interrupts whose handlers the child might munge,
1721 and record the current handlers so they can be restored later. */
1722 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1723 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1724 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1726 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1728 #endif /* HAVE_WORKING_VFORK */
1729 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1731 FD_SET (inchannel
, &input_wait_mask
);
1732 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1733 if (inchannel
> max_process_desc
)
1734 max_process_desc
= inchannel
;
1736 /* Until we store the proper pid, enable the SIGCHLD handler
1737 to recognize an unknown pid as standing for this process.
1738 It is very important not to let this `marker' value stay
1739 in the table after this function has returned; if it does
1740 it might cause call-process to hang and subsequent asynchronous
1741 processes to get their return values scrambled. */
1742 XPROCESS (process
)->pid
= -1;
1744 /* This must be called after the above line because it may signal an
1746 setup_process_coding_systems (process
);
1751 /* child_setup must clobber environ on systems with true vfork.
1752 Protect it from permanent change. */
1753 char **save_environ
= environ
;
1754 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1759 #endif /* not WINDOWSNT */
1761 int xforkin
= forkin
;
1762 int xforkout
= forkout
;
1764 /* Make the pty be the controlling terminal of the process. */
1766 /* First, disconnect its current controlling terminal. */
1768 /* We tried doing setsid only if pty_flag, but it caused
1769 process_set_signal to fail on SGI when using a pipe. */
1771 /* Make the pty's terminal the controlling terminal. */
1772 if (pty_flag
&& xforkin
>= 0)
1775 /* We ignore the return value
1776 because faith@cs.unc.edu says that is necessary on Linux. */
1777 ioctl (xforkin
, TIOCSCTTY
, 0);
1780 #else /* not HAVE_SETSID */
1782 /* It's very important to call setpgrp here and no time
1783 afterwards. Otherwise, we lose our controlling tty which
1784 is set when we open the pty. */
1787 #endif /* not HAVE_SETSID */
1788 #if defined (LDISC1)
1789 if (pty_flag
&& xforkin
>= 0)
1792 tcgetattr (xforkin
, &t
);
1794 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1795 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1798 #if defined (NTTYDISC) && defined (TIOCSETD)
1799 if (pty_flag
&& xforkin
>= 0)
1801 /* Use new line discipline. */
1802 int ldisc
= NTTYDISC
;
1803 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1808 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1809 can do TIOCSPGRP only to the process's controlling tty. */
1812 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1813 I can't test it since I don't have 4.3. */
1814 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1817 ioctl (j
, TIOCNOTTY
, 0);
1821 /* In order to get a controlling terminal on some versions
1822 of BSD, it is necessary to put the process in pgrp 0
1823 before it opens the terminal. */
1831 #endif /* TIOCNOTTY */
1833 #if !defined (DONT_REOPEN_PTY)
1834 /*** There is a suggestion that this ought to be a
1835 conditional on TIOCSPGRP,
1836 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1837 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1838 that system does seem to need this code, even though
1839 both HAVE_SETSID and TIOCSCTTY are defined. */
1840 /* Now close the pty (if we had it open) and reopen it.
1841 This makes the pty the controlling terminal of the subprocess. */
1845 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1848 emacs_close (xforkin
);
1849 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1853 emacs_write (1, "Couldn't open the pty terminal ", 31);
1854 emacs_write (1, pty_name
, strlen (pty_name
));
1855 emacs_write (1, "\n", 1);
1860 #endif /* not DONT_REOPEN_PTY */
1862 #ifdef SETUP_SLAVE_PTY
1867 #endif /* SETUP_SLAVE_PTY */
1869 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1870 Now reenable it in the child, so it will die when we want it to. */
1872 signal (SIGHUP
, SIG_DFL
);
1874 #endif /* HAVE_PTYS */
1876 signal (SIGINT
, SIG_DFL
);
1877 signal (SIGQUIT
, SIG_DFL
);
1878 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1880 signal (SIGPIPE
, SIG_DFL
);
1882 /* Stop blocking signals in the child. */
1883 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1886 child_setup_tty (xforkout
);
1888 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1889 new_argv
, 1, encoded_current_dir
);
1890 #else /* not WINDOWSNT */
1892 emacs_close (wait_child_setup
[0]);
1894 child_setup (xforkin
, xforkout
, xforkout
,
1895 new_argv
, 1, encoded_current_dir
);
1896 #endif /* not WINDOWSNT */
1898 environ
= save_environ
;
1903 /* This runs in the Emacs process. */
1907 emacs_close (forkin
);
1908 if (forkin
!= forkout
&& forkout
>= 0)
1909 emacs_close (forkout
);
1913 /* vfork succeeded. */
1914 XPROCESS (process
)->pid
= pid
;
1917 register_child (pid
, inchannel
);
1918 #endif /* WINDOWSNT */
1920 /* If the subfork execv fails, and it exits,
1921 this close hangs. I don't know why.
1922 So have an interrupt jar it loose. */
1924 struct atimer
*timer
;
1925 EMACS_TIME offset
= make_emacs_time (1, 0);
1928 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1931 emacs_close (forkin
);
1933 cancel_atimer (timer
);
1937 if (forkin
!= forkout
&& forkout
>= 0)
1938 emacs_close (forkout
);
1942 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
1945 pset_tty_name (XPROCESS (process
), Qnil
);
1947 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1948 /* Wait for child_setup to complete in case that vfork is
1949 actually defined as fork. The descriptor wait_child_setup[1]
1950 of a pipe is closed at the child side either by close-on-exec
1951 on successful execvp or the _exit call in child_setup. */
1955 emacs_close (wait_child_setup
[1]);
1956 emacs_read (wait_child_setup
[0], &dummy
, 1);
1957 emacs_close (wait_child_setup
[0]);
1962 /* Restore the signal state whether vfork succeeded or not.
1963 (We will signal an error, below, if it failed.) */
1964 #ifdef HAVE_WORKING_VFORK
1965 /* Restore the parent's signal handlers. */
1966 sigaction (SIGINT
, &sigint_action
, 0);
1967 sigaction (SIGQUIT
, &sigquit_action
, 0);
1968 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1970 sigaction (SIGHUP
, &sighup_action
, 0);
1972 #endif /* HAVE_WORKING_VFORK */
1973 /* Stop blocking signals in the parent. */
1974 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1976 /* Now generate the error if vfork failed. */
1978 report_file_error ("Doing vfork", Qnil
);
1982 create_pty (Lisp_Object process
)
1984 int inchannel
, outchannel
;
1987 inchannel
= outchannel
= -1;
1990 if (!NILP (Vprocess_connection_type
))
1991 outchannel
= inchannel
= allocate_pty ();
1995 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1996 /* On most USG systems it does not work to open the pty's tty here,
1997 then close it and reopen it in the child. */
1999 /* Don't let this terminal become our controlling terminal
2000 (in case we don't have one). */
2001 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2003 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
2006 report_file_error ("Opening pty", Qnil
);
2007 #if defined (DONT_REOPEN_PTY)
2008 /* In the case that vfork is defined as fork, the parent process
2009 (Emacs) may send some data before the child process completes
2010 tty options setup. So we setup tty before forking. */
2011 child_setup_tty (forkout
);
2012 #endif /* DONT_REOPEN_PTY */
2013 #endif /* not USG, or USG_SUBTTY_WORKS */
2016 #endif /* HAVE_PTYS */
2019 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2020 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2023 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2024 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2028 /* Record this as an active process, with its channels.
2029 As a result, child_setup will close Emacs's side of the pipes. */
2030 chan_process
[inchannel
] = process
;
2031 XPROCESS (process
)->infd
= inchannel
;
2032 XPROCESS (process
)->outfd
= outchannel
;
2034 /* Previously we recorded the tty descriptor used in the subprocess.
2035 It was only used for getting the foreground tty process, so now
2036 we just reopen the device (see emacs_get_tty_pgrp) as this is
2037 more portable (see USG_SUBTTY_WORKS above). */
2039 XPROCESS (process
)->pty_flag
= pty_flag
;
2040 pset_status (XPROCESS (process
), Qrun
);
2041 setup_process_coding_systems (process
);
2043 FD_SET (inchannel
, &input_wait_mask
);
2044 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2045 if (inchannel
> max_process_desc
)
2046 max_process_desc
= inchannel
;
2048 XPROCESS (process
)->pid
= -2;
2051 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2054 pset_tty_name (XPROCESS (process
), Qnil
);
2058 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2059 The address family of sa is not included in the result. */
2062 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2064 Lisp_Object address
;
2067 register struct Lisp_Vector
*p
;
2069 /* Workaround for a bug in getsockname on BSD: Names bound to
2070 sockets in the UNIX domain are inaccessible; getsockname returns
2071 a zero length name. */
2072 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2073 return empty_unibyte_string
;
2075 switch (sa
->sa_family
)
2079 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2080 len
= sizeof (sin
->sin_addr
) + 1;
2081 address
= Fmake_vector (make_number (len
), Qnil
);
2082 p
= XVECTOR (address
);
2083 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2084 cp
= (unsigned char *) &sin
->sin_addr
;
2090 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2091 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2092 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2093 address
= Fmake_vector (make_number (len
), Qnil
);
2094 p
= XVECTOR (address
);
2095 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2096 for (i
= 0; i
< len
; i
++)
2097 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2101 #ifdef HAVE_LOCAL_SOCKETS
2104 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2105 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2106 if (sockun
->sun_path
[i
] == 0)
2108 return make_unibyte_string (sockun
->sun_path
, i
);
2112 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2113 address
= Fcons (make_number (sa
->sa_family
),
2114 Fmake_vector (make_number (len
), Qnil
));
2115 p
= XVECTOR (XCDR (address
));
2116 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2122 p
->contents
[i
++] = make_number (*cp
++);
2128 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2131 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2133 register struct Lisp_Vector
*p
;
2135 if (VECTORP (address
))
2137 p
= XVECTOR (address
);
2138 if (p
->header
.size
== 5)
2141 return sizeof (struct sockaddr_in
);
2144 else if (p
->header
.size
== 9)
2146 *familyp
= AF_INET6
;
2147 return sizeof (struct sockaddr_in6
);
2151 #ifdef HAVE_LOCAL_SOCKETS
2152 else if (STRINGP (address
))
2154 *familyp
= AF_LOCAL
;
2155 return sizeof (struct sockaddr_un
);
2158 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2159 && VECTORP (XCDR (address
)))
2161 struct sockaddr
*sa
;
2162 *familyp
= XINT (XCAR (address
));
2163 p
= XVECTOR (XCDR (address
));
2164 return p
->header
.size
+ sizeof (sa
->sa_family
);
2169 /* Convert an address object (vector or string) to an internal sockaddr.
2171 The address format has been basically validated by
2172 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2173 it could have come from user data. So if FAMILY is not valid,
2174 we return after zeroing *SA. */
2177 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2179 register struct Lisp_Vector
*p
;
2180 register unsigned char *cp
= NULL
;
2184 memset (sa
, 0, len
);
2186 if (VECTORP (address
))
2188 p
= XVECTOR (address
);
2189 if (family
== AF_INET
)
2191 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2192 len
= sizeof (sin
->sin_addr
) + 1;
2193 hostport
= XINT (p
->contents
[--len
]);
2194 sin
->sin_port
= htons (hostport
);
2195 cp
= (unsigned char *)&sin
->sin_addr
;
2196 sa
->sa_family
= family
;
2199 else if (family
== AF_INET6
)
2201 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2202 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2203 len
= sizeof (sin6
->sin6_addr
) + 1;
2204 hostport
= XINT (p
->contents
[--len
]);
2205 sin6
->sin6_port
= htons (hostport
);
2206 for (i
= 0; i
< len
; i
++)
2207 if (INTEGERP (p
->contents
[i
]))
2209 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2212 sa
->sa_family
= family
;
2219 else if (STRINGP (address
))
2221 #ifdef HAVE_LOCAL_SOCKETS
2222 if (family
== AF_LOCAL
)
2224 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2225 cp
= SDATA (address
);
2226 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2227 sockun
->sun_path
[i
] = *cp
++;
2228 sa
->sa_family
= family
;
2235 p
= XVECTOR (XCDR (address
));
2236 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2239 for (i
= 0; i
< len
; i
++)
2240 if (INTEGERP (p
->contents
[i
]))
2241 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2244 #ifdef DATAGRAM_SOCKETS
2245 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2247 doc
: /* Get the current datagram address associated with PROCESS. */)
2248 (Lisp_Object process
)
2252 CHECK_PROCESS (process
);
2254 if (!DATAGRAM_CONN_P (process
))
2257 channel
= XPROCESS (process
)->infd
;
2258 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2259 datagram_address
[channel
].len
);
2262 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2264 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2265 Returns nil upon error setting address, ADDRESS otherwise. */)
2266 (Lisp_Object process
, Lisp_Object address
)
2271 CHECK_PROCESS (process
);
2273 if (!DATAGRAM_CONN_P (process
))
2276 channel
= XPROCESS (process
)->infd
;
2278 len
= get_lisp_to_sockaddr_size (address
, &family
);
2279 if (datagram_address
[channel
].len
!= len
)
2281 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2287 static const struct socket_options
{
2288 /* The name of this option. Should be lowercase version of option
2289 name without SO_ prefix. */
2291 /* Option level SOL_... */
2293 /* Option number SO_... */
2295 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2296 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2297 } socket_options
[] =
2299 #ifdef SO_BINDTODEVICE
2300 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2303 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2306 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2309 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2312 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2315 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2318 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2321 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2323 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2326 /* Set option OPT to value VAL on socket S.
2328 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2329 Signals an error if setting a known option fails.
2333 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2336 const struct socket_options
*sopt
;
2341 name
= SSDATA (SYMBOL_NAME (opt
));
2342 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2343 if (strcmp (name
, sopt
->name
) == 0)
2346 switch (sopt
->opttype
)
2351 optval
= NILP (val
) ? 0 : 1;
2352 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2353 &optval
, sizeof (optval
));
2360 if (TYPE_RANGED_INTEGERP (int, val
))
2361 optval
= XINT (val
);
2363 error ("Bad option value for %s", name
);
2364 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2365 &optval
, sizeof (optval
));
2369 #ifdef SO_BINDTODEVICE
2372 char devname
[IFNAMSIZ
+1];
2374 /* This is broken, at least in the Linux 2.4 kernel.
2375 To unbind, the arg must be a zero integer, not the empty string.
2376 This should work on all systems. KFS. 2003-09-23. */
2377 memset (devname
, 0, sizeof devname
);
2380 char *arg
= SSDATA (val
);
2381 int len
= min (strlen (arg
), IFNAMSIZ
);
2382 memcpy (devname
, arg
, len
);
2384 else if (!NILP (val
))
2385 error ("Bad option value for %s", name
);
2386 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2395 struct linger linger
;
2398 linger
.l_linger
= 0;
2399 if (TYPE_RANGED_INTEGERP (int, val
))
2400 linger
.l_linger
= XINT (val
);
2402 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2403 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2404 &linger
, sizeof (linger
));
2414 report_file_error ("Cannot set network option",
2415 Fcons (opt
, Fcons (val
, Qnil
)));
2416 return (1 << sopt
->optbit
);
2420 DEFUN ("set-network-process-option",
2421 Fset_network_process_option
, Sset_network_process_option
,
2423 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2424 See `make-network-process' for a list of options and values.
2425 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2426 OPTION is not a supported option, return nil instead; otherwise return t. */)
2427 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2430 struct Lisp_Process
*p
;
2432 CHECK_PROCESS (process
);
2433 p
= XPROCESS (process
);
2434 if (!NETCONN1_P (p
))
2435 error ("Process is not a network process");
2439 error ("Process is not running");
2441 if (set_socket_option (s
, option
, value
))
2443 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2447 if (NILP (no_error
))
2448 error ("Unknown or unsupported option");
2454 DEFUN ("serial-process-configure",
2455 Fserial_process_configure
,
2456 Sserial_process_configure
,
2458 doc
: /* Configure speed, bytesize, etc. of a serial process.
2460 Arguments are specified as keyword/argument pairs. Attributes that
2461 are not given are re-initialized from the process's current
2462 configuration (available via the function `process-contact') or set to
2463 reasonable default values. The following arguments are defined:
2469 -- Any of these arguments can be given to identify the process that is
2470 to be configured. If none of these arguments is given, the current
2471 buffer's process is used.
2473 :speed SPEED -- SPEED is the speed of the serial port in bits per
2474 second, also called baud rate. Any value can be given for SPEED, but
2475 most serial ports work only at a few defined values between 1200 and
2476 115200, with 9600 being the most common value. If SPEED is nil, the
2477 serial port is not configured any further, i.e., all other arguments
2478 are ignored. This may be useful for special serial ports such as
2479 Bluetooth-to-serial converters which can only be configured through AT
2480 commands. A value of nil for SPEED can be used only when passed
2481 through `make-serial-process' or `serial-term'.
2483 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2484 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2486 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2487 `odd' (use odd parity), or the symbol `even' (use even parity). If
2488 PARITY is not given, no parity is used.
2490 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2491 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2492 is not given or nil, 1 stopbit is used.
2494 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2495 flowcontrol to be used, which is either nil (don't use flowcontrol),
2496 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2497 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2498 flowcontrol is used.
2500 `serial-process-configure' is called by `make-serial-process' for the
2501 initial configuration of the serial port.
2505 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2507 \(serial-process-configure
2508 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2510 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2512 usage: (serial-process-configure &rest ARGS) */)
2513 (ptrdiff_t nargs
, Lisp_Object
*args
)
2515 struct Lisp_Process
*p
;
2516 Lisp_Object contact
= Qnil
;
2517 Lisp_Object proc
= Qnil
;
2518 struct gcpro gcpro1
;
2520 contact
= Flist (nargs
, args
);
2523 proc
= Fplist_get (contact
, QCprocess
);
2525 proc
= Fplist_get (contact
, QCname
);
2527 proc
= Fplist_get (contact
, QCbuffer
);
2529 proc
= Fplist_get (contact
, QCport
);
2530 proc
= get_process (proc
);
2531 p
= XPROCESS (proc
);
2532 if (!EQ (p
->type
, Qserial
))
2533 error ("Not a serial process");
2535 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2541 serial_configure (p
, contact
);
2547 /* Used by make-serial-process to recover from errors. */
2549 make_serial_process_unwind (Lisp_Object proc
)
2551 if (!PROCESSP (proc
))
2553 remove_process (proc
);
2557 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2559 doc
: /* Create and return a serial port process.
2561 In Emacs, serial port connections are represented by process objects,
2562 so input and output work as for subprocesses, and `delete-process'
2563 closes a serial port connection. However, a serial process has no
2564 process id, it cannot be signaled, and the status codes are different
2565 from normal processes.
2567 `make-serial-process' creates a process and a buffer, on which you
2568 probably want to use `process-send-string'. Try \\[serial-term] for
2569 an interactive terminal. See below for examples.
2571 Arguments are specified as keyword/argument pairs. The following
2572 arguments are defined:
2574 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2575 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2576 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2577 the backslashes in strings).
2579 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2580 which this function calls.
2582 :name NAME -- NAME is the name of the process. If NAME is not given,
2583 the value of PORT is used.
2585 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2586 with the process. Process output goes at the end of that buffer,
2587 unless you specify an output stream or filter function to handle the
2588 output. If BUFFER is not given, the value of NAME is used.
2590 :coding CODING -- If CODING is a symbol, it specifies the coding
2591 system used for both reading and writing for this process. If CODING
2592 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2593 ENCODING is used for writing.
2595 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2596 the process is running. If BOOL is not given, query before exiting.
2598 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2599 In the stopped state, a serial process does not accept incoming data,
2600 but you can send outgoing data. The stopped state is cleared by
2601 `continue-process' and set by `stop-process'.
2603 :filter FILTER -- Install FILTER as the process filter.
2605 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2607 :plist PLIST -- Install PLIST as the initial plist of the process.
2613 -- This function calls `serial-process-configure' to handle these
2616 The original argument list, possibly modified by later configuration,
2617 is available via the function `process-contact'.
2621 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2623 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2625 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2627 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2629 usage: (make-serial-process &rest ARGS) */)
2630 (ptrdiff_t nargs
, Lisp_Object
*args
)
2633 Lisp_Object proc
, contact
, port
;
2634 struct Lisp_Process
*p
;
2635 struct gcpro gcpro1
;
2636 Lisp_Object name
, buffer
;
2637 Lisp_Object tem
, val
;
2638 ptrdiff_t specpdl_count
= -1;
2643 contact
= Flist (nargs
, args
);
2646 port
= Fplist_get (contact
, QCport
);
2648 error ("No port specified");
2649 CHECK_STRING (port
);
2651 if (NILP (Fplist_member (contact
, QCspeed
)))
2652 error (":speed not specified");
2653 if (!NILP (Fplist_get (contact
, QCspeed
)))
2654 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2656 name
= Fplist_get (contact
, QCname
);
2659 CHECK_STRING (name
);
2660 proc
= make_process (name
);
2661 specpdl_count
= SPECPDL_INDEX ();
2662 record_unwind_protect (make_serial_process_unwind
, proc
);
2663 p
= XPROCESS (proc
);
2665 fd
= serial_open (SSDATA (port
));
2668 if (fd
> max_process_desc
)
2669 max_process_desc
= fd
;
2670 chan_process
[fd
] = proc
;
2672 buffer
= Fplist_get (contact
, QCbuffer
);
2675 buffer
= Fget_buffer_create (buffer
);
2676 pset_buffer (p
, buffer
);
2678 pset_childp (p
, contact
);
2679 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2680 pset_type (p
, Qserial
);
2681 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2682 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2684 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2685 p
->kill_without_query
= 1;
2686 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2687 pset_command (p
, Qt
);
2690 if (!EQ (p
->command
, Qt
))
2692 FD_SET (fd
, &input_wait_mask
);
2693 FD_SET (fd
, &non_keyboard_wait_mask
);
2696 if (BUFFERP (buffer
))
2698 set_marker_both (p
->mark
, buffer
,
2699 BUF_ZV (XBUFFER (buffer
)),
2700 BUF_ZV_BYTE (XBUFFER (buffer
)));
2703 tem
= Fplist_member (contact
, QCcoding
);
2704 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2710 val
= XCAR (XCDR (tem
));
2714 else if (!NILP (Vcoding_system_for_read
))
2715 val
= Vcoding_system_for_read
;
2716 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2717 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2719 pset_decode_coding_system (p
, val
);
2724 val
= XCAR (XCDR (tem
));
2728 else if (!NILP (Vcoding_system_for_write
))
2729 val
= Vcoding_system_for_write
;
2730 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2731 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2733 pset_encode_coding_system (p
, val
);
2735 setup_process_coding_systems (proc
);
2736 pset_decoding_buf (p
, empty_unibyte_string
);
2737 p
->decoding_carryover
= 0;
2738 pset_encoding_buf (p
, empty_unibyte_string
);
2739 p
->inherit_coding_system_flag
2740 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2742 Fserial_process_configure (nargs
, args
);
2744 specpdl_ptr
= specpdl
+ specpdl_count
;
2750 /* Create a network stream/datagram client/server process. Treated
2751 exactly like a normal process when reading and writing. Primary
2752 differences are in status display and process deletion. A network
2753 connection has no PID; you cannot signal it. All you can do is
2754 stop/continue it and deactivate/close it via delete-process */
2756 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2758 doc
: /* Create and return a network server or client process.
2760 In Emacs, network connections are represented by process objects, so
2761 input and output work as for subprocesses and `delete-process' closes
2762 a network connection. However, a network process has no process id,
2763 it cannot be signaled, and the status codes are different from normal
2766 Arguments are specified as keyword/argument pairs. The following
2767 arguments are defined:
2769 :name NAME -- NAME is name for process. It is modified if necessary
2772 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2773 with the process. Process output goes at end of that buffer, unless
2774 you specify an output stream or filter function to handle the output.
2775 BUFFER may be also nil, meaning that this process is not associated
2778 :host HOST -- HOST is name of the host to connect to, or its IP
2779 address. The symbol `local' specifies the local host. If specified
2780 for a server process, it must be a valid name or address for the local
2781 host, and only clients connecting to that address will be accepted.
2783 :service SERVICE -- SERVICE is name of the service desired, or an
2784 integer specifying a port number to connect to. If SERVICE is t,
2785 a random port number is selected for the server. (If Emacs was
2786 compiled with getaddrinfo, a port number can also be specified as a
2787 string, e.g. "80", as well as an integer. This is not portable.)
2789 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2790 stream type connection, `datagram' creates a datagram type connection,
2791 `seqpacket' creates a reliable datagram connection.
2793 :family FAMILY -- FAMILY is the address (and protocol) family for the
2794 service specified by HOST and SERVICE. The default (nil) is to use
2795 whatever address family (IPv4 or IPv6) that is defined for the host
2796 and port number specified by HOST and SERVICE. Other address families
2798 local -- for a local (i.e. UNIX) address specified by SERVICE.
2799 ipv4 -- use IPv4 address family only.
2800 ipv6 -- use IPv6 address family only.
2802 :local ADDRESS -- ADDRESS is the local address used for the connection.
2803 This parameter is ignored when opening a client process. When specified
2804 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2806 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2807 connection. This parameter is ignored when opening a stream server
2808 process. For a datagram server process, it specifies the initial
2809 setting of the remote datagram address. When specified for a client
2810 process, the FAMILY, HOST, and SERVICE args are ignored.
2812 The format of ADDRESS depends on the address family:
2813 - An IPv4 address is represented as an vector of integers [A B C D P]
2814 corresponding to numeric IP address A.B.C.D and port number P.
2815 - A local address is represented as a string with the address in the
2816 local address space.
2817 - An "unsupported family" address is represented by a cons (F . AV)
2818 where F is the family number and AV is a vector containing the socket
2819 address data with one element per address data byte. Do not rely on
2820 this format in portable code, as it may depend on implementation
2821 defined constants, data sizes, and data structure alignment.
2823 :coding CODING -- If CODING is a symbol, it specifies the coding
2824 system used for both reading and writing for this process. If CODING
2825 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2826 ENCODING is used for writing.
2828 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2829 return without waiting for the connection to complete; instead, the
2830 sentinel function will be called with second arg matching "open" (if
2831 successful) or "failed" when the connect completes. Default is to use
2832 a blocking connect (i.e. wait) for stream type connections.
2834 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2835 running when Emacs is exited.
2837 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2838 In the stopped state, a server process does not accept new
2839 connections, and a client process does not handle incoming traffic.
2840 The stopped state is cleared by `continue-process' and set by
2843 :filter FILTER -- Install FILTER as the process filter.
2845 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2846 process filter are multibyte, otherwise they are unibyte.
2847 If this keyword is not specified, the strings are multibyte if
2848 the default value of `enable-multibyte-characters' is non-nil.
2850 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2852 :log LOG -- Install LOG as the server process log function. This
2853 function is called when the server accepts a network connection from a
2854 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2855 is the server process, CLIENT is the new process for the connection,
2856 and MESSAGE is a string.
2858 :plist PLIST -- Install PLIST as the new process' initial plist.
2860 :server QLEN -- if QLEN is non-nil, create a server process for the
2861 specified FAMILY, SERVICE, and connection type (stream or datagram).
2862 If QLEN is an integer, it is used as the max. length of the server's
2863 pending connection queue (also known as the backlog); the default
2864 queue length is 5. Default is to create a client process.
2866 The following network options can be specified for this connection:
2868 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2869 :dontroute BOOL -- Only send to directly connected hosts.
2870 :keepalive BOOL -- Send keep-alive messages on network stream.
2871 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2872 :oobinline BOOL -- Place out-of-band data in receive data stream.
2873 :priority INT -- Set protocol defined priority for sent packets.
2874 :reuseaddr BOOL -- Allow reusing a recently used local address
2875 (this is allowed by default for a server process).
2876 :bindtodevice NAME -- bind to interface NAME. Using this may require
2877 special privileges on some systems.
2879 Consult the relevant system programmer's manual pages for more
2880 information on using these options.
2883 A server process will listen for and accept connections from clients.
2884 When a client connection is accepted, a new network process is created
2885 for the connection with the following parameters:
2887 - The client's process name is constructed by concatenating the server
2888 process' NAME and a client identification string.
2889 - If the FILTER argument is non-nil, the client process will not get a
2890 separate process buffer; otherwise, the client's process buffer is a newly
2891 created buffer named after the server process' BUFFER name or process
2892 NAME concatenated with the client identification string.
2893 - The connection type and the process filter and sentinel parameters are
2894 inherited from the server process' TYPE, FILTER and SENTINEL.
2895 - The client process' contact info is set according to the client's
2896 addressing information (typically an IP address and a port number).
2897 - The client process' plist is initialized from the server's plist.
2899 Notice that the FILTER and SENTINEL args are never used directly by
2900 the server process. Also, the BUFFER argument is not used directly by
2901 the server process, but via the optional :log function, accepted (and
2902 failed) connections may be logged in the server process' buffer.
2904 The original argument list, modified with the actual connection
2905 information, is available via the `process-contact' function.
2907 usage: (make-network-process &rest ARGS) */)
2908 (ptrdiff_t nargs
, Lisp_Object
*args
)
2911 Lisp_Object contact
;
2912 struct Lisp_Process
*p
;
2913 #ifdef HAVE_GETADDRINFO
2914 struct addrinfo ai
, *res
, *lres
;
2915 struct addrinfo hints
;
2916 const char *portstring
;
2918 #else /* HAVE_GETADDRINFO */
2919 struct _emacs_addrinfo
2925 struct sockaddr
*ai_addr
;
2926 struct _emacs_addrinfo
*ai_next
;
2928 #endif /* HAVE_GETADDRINFO */
2929 struct sockaddr_in address_in
;
2930 #ifdef HAVE_LOCAL_SOCKETS
2931 struct sockaddr_un address_un
;
2936 int s
= -1, outch
, inch
;
2937 struct gcpro gcpro1
;
2938 ptrdiff_t count
= SPECPDL_INDEX ();
2940 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2942 Lisp_Object name
, buffer
, host
, service
, address
;
2943 Lisp_Object filter
, sentinel
;
2944 int is_non_blocking_client
= 0;
2945 int is_server
= 0, backlog
= 5;
2952 /* Save arguments for process-contact and clone-process. */
2953 contact
= Flist (nargs
, args
);
2957 /* Ensure socket support is loaded if available. */
2958 init_winsock (TRUE
);
2961 /* :type TYPE (nil: stream, datagram */
2962 tem
= Fplist_get (contact
, QCtype
);
2964 socktype
= SOCK_STREAM
;
2965 #ifdef DATAGRAM_SOCKETS
2966 else if (EQ (tem
, Qdatagram
))
2967 socktype
= SOCK_DGRAM
;
2969 #ifdef HAVE_SEQPACKET
2970 else if (EQ (tem
, Qseqpacket
))
2971 socktype
= SOCK_SEQPACKET
;
2974 error ("Unsupported connection type");
2977 tem
= Fplist_get (contact
, QCserver
);
2980 /* Don't support network sockets when non-blocking mode is
2981 not available, since a blocked Emacs is not useful. */
2982 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2983 error ("Network servers not supported");
2986 if (TYPE_RANGED_INTEGERP (int, tem
))
2987 backlog
= XINT (tem
);
2991 /* Make QCaddress an alias for :local (server) or :remote (client). */
2992 QCaddress
= is_server
? QClocal
: QCremote
;
2995 if (!is_server
&& socktype
!= SOCK_DGRAM
2996 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2998 #ifndef NON_BLOCKING_CONNECT
2999 error ("Non-blocking connect not supported");
3001 is_non_blocking_client
= 1;
3005 name
= Fplist_get (contact
, QCname
);
3006 buffer
= Fplist_get (contact
, QCbuffer
);
3007 filter
= Fplist_get (contact
, QCfilter
);
3008 sentinel
= Fplist_get (contact
, QCsentinel
);
3010 CHECK_STRING (name
);
3012 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3013 ai
.ai_socktype
= socktype
;
3018 /* :local ADDRESS or :remote ADDRESS */
3019 address
= Fplist_get (contact
, QCaddress
);
3020 if (!NILP (address
))
3022 host
= service
= Qnil
;
3024 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3025 error ("Malformed :address");
3026 ai
.ai_family
= family
;
3027 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3028 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3032 /* :family FAMILY -- nil (for Inet), local, or integer. */
3033 tem
= Fplist_get (contact
, QCfamily
);
3036 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3042 #ifdef HAVE_LOCAL_SOCKETS
3043 else if (EQ (tem
, Qlocal
))
3047 else if (EQ (tem
, Qipv6
))
3050 else if (EQ (tem
, Qipv4
))
3052 else if (TYPE_RANGED_INTEGERP (int, tem
))
3053 family
= XINT (tem
);
3055 error ("Unknown address family");
3057 ai
.ai_family
= family
;
3059 /* :service SERVICE -- string, integer (port number), or t (random port). */
3060 service
= Fplist_get (contact
, QCservice
);
3062 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3063 host
= Fplist_get (contact
, QChost
);
3066 if (EQ (host
, Qlocal
))
3067 /* Depending on setup, "localhost" may map to different IPv4 and/or
3068 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3069 host
= build_string ("127.0.0.1");
3070 CHECK_STRING (host
);
3073 #ifdef HAVE_LOCAL_SOCKETS
3074 if (family
== AF_LOCAL
)
3078 message (":family local ignores the :host \"%s\" property",
3080 contact
= Fplist_put (contact
, QChost
, Qnil
);
3083 CHECK_STRING (service
);
3084 memset (&address_un
, 0, sizeof address_un
);
3085 address_un
.sun_family
= AF_LOCAL
;
3086 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3087 error ("Service name too long");
3088 strcpy (address_un
.sun_path
, SSDATA (service
));
3089 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3090 ai
.ai_addrlen
= sizeof address_un
;
3095 /* Slow down polling to every ten seconds.
3096 Some kernels have a bug which causes retrying connect to fail
3097 after a connect. Polling can interfere with gethostbyname too. */
3098 #ifdef POLL_FOR_INPUT
3099 if (socktype
!= SOCK_DGRAM
)
3101 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3102 bind_polling_period (10);
3106 #ifdef HAVE_GETADDRINFO
3107 /* If we have a host, use getaddrinfo to resolve both host and service.
3108 Otherwise, use getservbyname to lookup the service. */
3112 /* SERVICE can either be a string or int.
3113 Convert to a C string for later use by getaddrinfo. */
3114 if (EQ (service
, Qt
))
3116 else if (INTEGERP (service
))
3118 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3119 portstring
= portbuf
;
3123 CHECK_STRING (service
);
3124 portstring
= SSDATA (service
);
3129 memset (&hints
, 0, sizeof (hints
));
3131 hints
.ai_family
= family
;
3132 hints
.ai_socktype
= socktype
;
3133 hints
.ai_protocol
= 0;
3135 #ifdef HAVE_RES_INIT
3139 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3141 #ifdef HAVE_GAI_STRERROR
3142 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3144 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3150 #endif /* HAVE_GETADDRINFO */
3152 /* We end up here if getaddrinfo is not defined, or in case no hostname
3153 has been specified (e.g. for a local server process). */
3155 if (EQ (service
, Qt
))
3157 else if (INTEGERP (service
))
3158 port
= htons ((unsigned short) XINT (service
));
3161 struct servent
*svc_info
;
3162 CHECK_STRING (service
);
3163 svc_info
= getservbyname (SSDATA (service
),
3164 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3166 error ("Unknown service: %s", SDATA (service
));
3167 port
= svc_info
->s_port
;
3170 memset (&address_in
, 0, sizeof address_in
);
3171 address_in
.sin_family
= family
;
3172 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3173 address_in
.sin_port
= port
;
3175 #ifndef HAVE_GETADDRINFO
3178 struct hostent
*host_info_ptr
;
3180 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3181 as it may `hang' Emacs for a very long time. */
3185 #ifdef HAVE_RES_INIT
3189 host_info_ptr
= gethostbyname (SDATA (host
));
3194 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3195 host_info_ptr
->h_length
);
3196 family
= host_info_ptr
->h_addrtype
;
3197 address_in
.sin_family
= family
;
3200 /* Attempt to interpret host as numeric inet address */
3202 unsigned long numeric_addr
;
3203 numeric_addr
= inet_addr (SSDATA (host
));
3204 if (numeric_addr
== -1)
3205 error ("Unknown host \"%s\"", SDATA (host
));
3207 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3208 sizeof (address_in
.sin_addr
));
3212 #endif /* not HAVE_GETADDRINFO */
3214 ai
.ai_family
= family
;
3215 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3216 ai
.ai_addrlen
= sizeof address_in
;
3220 /* Do this in case we never enter the for-loop below. */
3221 count1
= SPECPDL_INDEX ();
3224 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3233 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3240 #ifdef DATAGRAM_SOCKETS
3241 if (!is_server
&& socktype
== SOCK_DGRAM
)
3243 #endif /* DATAGRAM_SOCKETS */
3245 #ifdef NON_BLOCKING_CONNECT
3246 if (is_non_blocking_client
)
3249 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3251 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3263 /* Make us close S if quit. */
3264 record_unwind_protect (close_file_unwind
, make_number (s
));
3266 /* Parse network options in the arg list.
3267 We simply ignore anything which isn't a known option (including other keywords).
3268 An error is signaled if setting a known option fails. */
3269 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3270 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3274 /* Configure as a server socket. */
3276 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3277 explicit :reuseaddr key to override this. */
3278 #ifdef HAVE_LOCAL_SOCKETS
3279 if (family
!= AF_LOCAL
)
3281 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3284 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3285 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3288 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3289 report_file_error ("Cannot bind server socket", Qnil
);
3291 #ifdef HAVE_GETSOCKNAME
3292 if (EQ (service
, Qt
))
3294 struct sockaddr_in sa1
;
3295 socklen_t len1
= sizeof (sa1
);
3296 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3298 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3299 service
= make_number (ntohs (sa1
.sin_port
));
3300 contact
= Fplist_put (contact
, QCservice
, service
);
3305 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3306 report_file_error ("Cannot listen on server socket", Qnil
);
3314 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3317 if (ret
== 0 || xerrno
== EISCONN
)
3319 /* The unwind-protect will be discarded afterwards.
3320 Likewise for immediate_quit. */
3324 #ifdef NON_BLOCKING_CONNECT
3326 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3330 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3337 if (xerrno
== EINTR
)
3339 /* Unlike most other syscalls connect() cannot be called
3340 again. (That would return EALREADY.) The proper way to
3341 wait for completion is pselect(). */
3349 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3355 report_file_error ("select failed", Qnil
);
3359 len
= sizeof xerrno
;
3360 eassert (FD_ISSET (s
, &fdset
));
3361 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3362 report_file_error ("getsockopt failed", Qnil
);
3364 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3368 #endif /* !WINDOWSNT */
3372 /* Discard the unwind protect closing S. */
3373 specpdl_ptr
= specpdl
+ count1
;
3378 if (xerrno
== EINTR
)
3385 #ifdef DATAGRAM_SOCKETS
3386 if (socktype
== SOCK_DGRAM
)
3388 if (datagram_address
[s
].sa
)
3390 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3391 datagram_address
[s
].len
= lres
->ai_addrlen
;
3395 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3396 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3399 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3400 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3401 conv_lisp_to_sockaddr (rfamily
, remote
,
3402 datagram_address
[s
].sa
, rlen
);
3406 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3409 contact
= Fplist_put (contact
, QCaddress
,
3410 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3411 #ifdef HAVE_GETSOCKNAME
3414 struct sockaddr_in sa1
;
3415 socklen_t len1
= sizeof (sa1
);
3416 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3417 contact
= Fplist_put (contact
, QClocal
,
3418 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3425 #ifdef HAVE_GETADDRINFO
3434 /* Discard the unwind protect for closing S, if any. */
3435 specpdl_ptr
= specpdl
+ count1
;
3437 /* Unwind bind_polling_period and request_sigio. */
3438 unbind_to (count
, Qnil
);
3442 /* If non-blocking got this far - and failed - assume non-blocking is
3443 not supported after all. This is probably a wrong assumption, but
3444 the normal blocking calls to open-network-stream handles this error
3446 if (is_non_blocking_client
)
3451 report_file_error ("make server process failed", contact
);
3453 report_file_error ("make client process failed", contact
);
3460 buffer
= Fget_buffer_create (buffer
);
3461 proc
= make_process (name
);
3463 chan_process
[inch
] = proc
;
3466 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3469 fcntl (inch
, F_SETFL
, O_NDELAY
);
3473 p
= XPROCESS (proc
);
3475 pset_childp (p
, contact
);
3476 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3477 pset_type (p
, Qnetwork
);
3479 pset_buffer (p
, buffer
);
3480 pset_sentinel (p
, sentinel
);
3481 pset_filter (p
, filter
);
3482 pset_log (p
, Fplist_get (contact
, QClog
));
3483 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3484 p
->kill_without_query
= 1;
3485 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3486 pset_command (p
, Qt
);
3490 if (is_server
&& socktype
!= SOCK_DGRAM
)
3491 pset_status (p
, Qlisten
);
3493 /* Make the process marker point into the process buffer (if any). */
3494 if (BUFFERP (buffer
))
3495 set_marker_both (p
->mark
, buffer
,
3496 BUF_ZV (XBUFFER (buffer
)),
3497 BUF_ZV_BYTE (XBUFFER (buffer
)));
3499 #ifdef NON_BLOCKING_CONNECT
3500 if (is_non_blocking_client
)
3502 /* We may get here if connect did succeed immediately. However,
3503 in that case, we still need to signal this like a non-blocking
3505 pset_status (p
, Qconnect
);
3506 if (!FD_ISSET (inch
, &connect_wait_mask
))
3508 FD_SET (inch
, &connect_wait_mask
);
3509 FD_SET (inch
, &write_mask
);
3510 num_pending_connects
++;
3515 /* A server may have a client filter setting of Qt, but it must
3516 still listen for incoming connects unless it is stopped. */
3517 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3518 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3520 FD_SET (inch
, &input_wait_mask
);
3521 FD_SET (inch
, &non_keyboard_wait_mask
);
3524 if (inch
> max_process_desc
)
3525 max_process_desc
= inch
;
3527 tem
= Fplist_member (contact
, QCcoding
);
3528 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3529 tem
= Qnil
; /* No error message (too late!). */
3532 /* Setup coding systems for communicating with the network stream. */
3533 struct gcpro gcpro1
;
3534 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3535 Lisp_Object coding_systems
= Qt
;
3536 Lisp_Object fargs
[5], val
;
3540 val
= XCAR (XCDR (tem
));
3544 else if (!NILP (Vcoding_system_for_read
))
3545 val
= Vcoding_system_for_read
;
3546 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3547 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3548 /* We dare not decode end-of-line format by setting VAL to
3549 Qraw_text, because the existing Emacs Lisp libraries
3550 assume that they receive bare code including a sequence of
3555 if (NILP (host
) || NILP (service
))
3556 coding_systems
= Qnil
;
3559 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3560 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3562 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3565 if (CONSP (coding_systems
))
3566 val
= XCAR (coding_systems
);
3567 else if (CONSP (Vdefault_process_coding_system
))
3568 val
= XCAR (Vdefault_process_coding_system
);
3572 pset_decode_coding_system (p
, val
);
3576 val
= XCAR (XCDR (tem
));
3580 else if (!NILP (Vcoding_system_for_write
))
3581 val
= Vcoding_system_for_write
;
3582 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3586 if (EQ (coding_systems
, Qt
))
3588 if (NILP (host
) || NILP (service
))
3589 coding_systems
= Qnil
;
3592 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3593 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3595 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3599 if (CONSP (coding_systems
))
3600 val
= XCDR (coding_systems
);
3601 else if (CONSP (Vdefault_process_coding_system
))
3602 val
= XCDR (Vdefault_process_coding_system
);
3606 pset_encode_coding_system (p
, val
);
3608 setup_process_coding_systems (proc
);
3610 pset_decoding_buf (p
, empty_unibyte_string
);
3611 p
->decoding_carryover
= 0;
3612 pset_encoding_buf (p
, empty_unibyte_string
);
3614 p
->inherit_coding_system_flag
3615 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3622 #if defined (HAVE_NET_IF_H)
3625 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3626 doc
: /* Return an alist of all network interfaces and their network address.
3627 Each element is a cons, the car of which is a string containing the
3628 interface name, and the cdr is the network address in internal
3629 format; see the description of ADDRESS in `make-network-process'. */)
3632 struct ifconf ifconf
;
3633 struct ifreq
*ifreq
;
3635 ptrdiff_t buf_size
= 512;
3639 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3645 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3646 ifconf
.ifc_buf
= buf
;
3647 ifconf
.ifc_len
= buf_size
;
3648 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3655 while (ifconf
.ifc_len
== buf_size
);
3660 ifreq
= ifconf
.ifc_req
;
3661 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3663 struct ifreq
*ifq
= ifreq
;
3664 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3665 #define SIZEOF_IFREQ(sif) \
3666 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3667 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3669 int len
= SIZEOF_IFREQ (ifq
);
3671 int len
= sizeof (*ifreq
);
3673 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3675 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3677 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3680 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3681 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3682 res
= Fcons (Fcons (build_string (namebuf
),
3683 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3684 sizeof (struct sockaddr
))),
3691 #endif /* SIOCGIFCONF */
3693 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3697 const char *flag_sym
;
3700 static const struct ifflag_def ifflag_table
[] = {
3704 #ifdef IFF_BROADCAST
3705 { IFF_BROADCAST
, "broadcast" },
3708 { IFF_DEBUG
, "debug" },
3711 { IFF_LOOPBACK
, "loopback" },
3713 #ifdef IFF_POINTOPOINT
3714 { IFF_POINTOPOINT
, "pointopoint" },
3717 { IFF_RUNNING
, "running" },
3720 { IFF_NOARP
, "noarp" },
3723 { IFF_PROMISC
, "promisc" },
3725 #ifdef IFF_NOTRAILERS
3726 #ifdef NS_IMPL_COCOA
3727 /* Really means smart, notrailers is obsolete */
3728 { IFF_NOTRAILERS
, "smart" },
3730 { IFF_NOTRAILERS
, "notrailers" },
3734 { IFF_ALLMULTI
, "allmulti" },
3737 { IFF_MASTER
, "master" },
3740 { IFF_SLAVE
, "slave" },
3742 #ifdef IFF_MULTICAST
3743 { IFF_MULTICAST
, "multicast" },
3746 { IFF_PORTSEL
, "portsel" },
3748 #ifdef IFF_AUTOMEDIA
3749 { IFF_AUTOMEDIA
, "automedia" },
3752 { IFF_DYNAMIC
, "dynamic" },
3755 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3758 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3761 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3764 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3767 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3772 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3773 doc
: /* Return information about network interface named IFNAME.
3774 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3775 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3776 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3777 FLAGS is the current flags of the interface. */)
3778 (Lisp_Object ifname
)
3781 Lisp_Object res
= Qnil
;
3785 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3786 && defined HAVE_GETIFADDRS && defined LLADDR)
3787 struct ifaddrs
*ifap
;
3790 CHECK_STRING (ifname
);
3792 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3793 error ("interface name too long");
3794 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3796 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3801 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3802 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3804 int flags
= rq
.ifr_flags
;
3805 const struct ifflag_def
*fp
;
3808 /* If flags is smaller than int (i.e. short) it may have the high bit set
3809 due to IFF_MULTICAST. In that case, sign extending it into
3811 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3812 flags
= (unsigned short) rq
.ifr_flags
;
3815 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3817 if (flags
& fp
->flag_bit
)
3819 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3820 flags
-= fp
->flag_bit
;
3823 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3827 elt
= Fcons (make_number (fnum
), elt
);
3832 res
= Fcons (elt
, res
);
3835 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3836 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3838 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3839 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3843 for (n
= 0; n
< 6; n
++)
3844 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3845 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3847 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3848 if (getifaddrs (&ifap
) != -1)
3850 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3851 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3854 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3856 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3857 unsigned char linkaddr
[6];
3860 if (it
->ifa_addr
->sa_family
!= AF_LINK
3861 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3862 || sdl
->sdl_alen
!= 6)
3865 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3866 for (n
= 0; n
< 6; n
++)
3867 p
->contents
[n
] = make_number (linkaddr
[n
]);
3869 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3873 #ifdef HAVE_FREEIFADDRS
3877 #endif /* HAVE_GETIFADDRS && LLADDR */
3879 res
= Fcons (elt
, res
);
3882 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3883 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3886 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3887 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3889 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3893 res
= Fcons (elt
, res
);
3896 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3897 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3900 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3903 res
= Fcons (elt
, res
);
3906 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3907 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3910 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3913 res
= Fcons (elt
, res
);
3917 return any
? res
: Qnil
;
3920 #endif /* defined (HAVE_NET_IF_H) */
3922 /* Turn off input and output for process PROC. */
3925 deactivate_process (Lisp_Object proc
)
3927 register int inchannel
, outchannel
;
3928 register struct Lisp_Process
*p
= XPROCESS (proc
);
3931 /* Delete GnuTLS structures in PROC, if any. */
3932 emacs_gnutls_deinit (proc
);
3933 #endif /* HAVE_GNUTLS */
3935 inchannel
= p
->infd
;
3936 outchannel
= p
->outfd
;
3938 #ifdef ADAPTIVE_READ_BUFFERING
3939 if (p
->read_output_delay
> 0)
3941 if (--process_output_delay_count
< 0)
3942 process_output_delay_count
= 0;
3943 p
->read_output_delay
= 0;
3944 p
->read_output_skip
= 0;
3950 /* Beware SIGCHLD hereabouts. */
3951 flush_pending_output (inchannel
);
3952 emacs_close (inchannel
);
3953 if (outchannel
>= 0 && outchannel
!= inchannel
)
3954 emacs_close (outchannel
);
3958 #ifdef DATAGRAM_SOCKETS
3959 if (DATAGRAM_CHAN_P (inchannel
))
3961 xfree (datagram_address
[inchannel
].sa
);
3962 datagram_address
[inchannel
].sa
= 0;
3963 datagram_address
[inchannel
].len
= 0;
3966 chan_process
[inchannel
] = Qnil
;
3967 FD_CLR (inchannel
, &input_wait_mask
);
3968 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3969 #ifdef NON_BLOCKING_CONNECT
3970 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3972 FD_CLR (inchannel
, &connect_wait_mask
);
3973 FD_CLR (inchannel
, &write_mask
);
3974 if (--num_pending_connects
< 0)
3978 if (inchannel
== max_process_desc
)
3981 /* We just closed the highest-numbered process input descriptor,
3982 so recompute the highest-numbered one now. */
3983 max_process_desc
= 0;
3984 for (i
= 0; i
< MAXDESC
; i
++)
3985 if (!NILP (chan_process
[i
]))
3986 max_process_desc
= i
;
3992 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3994 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3995 It is read into the process' buffers or given to their filter functions.
3996 Non-nil arg PROCESS means do not return until some output has been received
3999 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4000 and milliseconds to wait; return after that much time whether or not
4001 there is any subprocess output. If SECONDS is a floating point number,
4002 it specifies a fractional number of seconds to wait.
4003 The MILLISEC argument is obsolete and should be avoided.
4005 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4006 from PROCESS, suspending reading output from other processes.
4007 If JUST-THIS-ONE is an integer, don't run any timers either.
4008 Return non-nil if we received any output before the timeout expired. */)
4009 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4014 if (! NILP (process
))
4015 CHECK_PROCESS (process
);
4017 just_this_one
= Qnil
;
4019 if (!NILP (millisec
))
4020 { /* Obsolete calling convention using integers rather than floats. */
4021 CHECK_NUMBER (millisec
);
4023 seconds
= make_float (XINT (millisec
) / 1000.0);
4026 CHECK_NUMBER (seconds
);
4027 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4034 if (!NILP (seconds
))
4036 if (INTEGERP (seconds
))
4038 if (0 < XINT (seconds
))
4040 secs
= XINT (seconds
);
4044 else if (FLOATP (seconds
))
4046 if (0 < XFLOAT_DATA (seconds
))
4048 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4049 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
4050 nsecs
= EMACS_NSECS (t
);
4054 wrong_type_argument (Qnumberp
, seconds
);
4056 else if (! NILP (process
))
4060 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4062 !NILP (process
) ? XPROCESS (process
) : NULL
,
4063 NILP (just_this_one
) ? 0 :
4064 !INTEGERP (just_this_one
) ? 1 : -1)
4068 /* Accept a connection for server process SERVER on CHANNEL. */
4070 static int connect_counter
= 0;
4073 server_accept_connection (Lisp_Object server
, int channel
)
4075 Lisp_Object proc
, caller
, name
, buffer
;
4076 Lisp_Object contact
, host
, service
;
4077 struct Lisp_Process
*ps
= XPROCESS (server
);
4078 struct Lisp_Process
*p
;
4082 struct sockaddr_in in
;
4084 struct sockaddr_in6 in6
;
4086 #ifdef HAVE_LOCAL_SOCKETS
4087 struct sockaddr_un un
;
4090 socklen_t len
= sizeof saddr
;
4092 s
= accept (channel
, &saddr
.sa
, &len
);
4101 if (code
== EWOULDBLOCK
)
4105 if (!NILP (ps
->log
))
4106 call3 (ps
->log
, server
, Qnil
,
4107 concat3 (build_string ("accept failed with code"),
4108 Fnumber_to_string (make_number (code
)),
4109 build_string ("\n")));
4115 /* Setup a new process to handle the connection. */
4117 /* Generate a unique identification of the caller, and build contact
4118 information for this process. */
4121 switch (saddr
.sa
.sa_family
)
4125 Lisp_Object args
[5];
4126 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4127 args
[0] = build_string ("%d.%d.%d.%d");
4128 args
[1] = make_number (*ip
++);
4129 args
[2] = make_number (*ip
++);
4130 args
[3] = make_number (*ip
++);
4131 args
[4] = make_number (*ip
++);
4132 host
= Fformat (5, args
);
4133 service
= make_number (ntohs (saddr
.in
.sin_port
));
4135 args
[0] = build_string (" <%s:%d>");
4138 caller
= Fformat (3, args
);
4145 Lisp_Object args
[9];
4146 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4148 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4149 for (i
= 0; i
< 8; i
++)
4150 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4151 host
= Fformat (9, args
);
4152 service
= make_number (ntohs (saddr
.in
.sin_port
));
4154 args
[0] = build_string (" <[%s]:%d>");
4157 caller
= Fformat (3, args
);
4162 #ifdef HAVE_LOCAL_SOCKETS
4166 caller
= Fnumber_to_string (make_number (connect_counter
));
4167 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4171 /* Create a new buffer name for this process if it doesn't have a
4172 filter. The new buffer name is based on the buffer name or
4173 process name of the server process concatenated with the caller
4176 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4180 buffer
= ps
->buffer
;
4182 buffer
= Fbuffer_name (buffer
);
4187 buffer
= concat2 (buffer
, caller
);
4188 buffer
= Fget_buffer_create (buffer
);
4192 /* Generate a unique name for the new server process. Combine the
4193 server process name with the caller identification. */
4195 name
= concat2 (ps
->name
, caller
);
4196 proc
= make_process (name
);
4198 chan_process
[s
] = proc
;
4201 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4204 fcntl (s
, F_SETFL
, O_NDELAY
);
4208 p
= XPROCESS (proc
);
4210 /* Build new contact information for this setup. */
4211 contact
= Fcopy_sequence (ps
->childp
);
4212 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4213 contact
= Fplist_put (contact
, QChost
, host
);
4214 if (!NILP (service
))
4215 contact
= Fplist_put (contact
, QCservice
, service
);
4216 contact
= Fplist_put (contact
, QCremote
,
4217 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4218 #ifdef HAVE_GETSOCKNAME
4220 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4221 contact
= Fplist_put (contact
, QClocal
,
4222 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4225 pset_childp (p
, contact
);
4226 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4227 pset_type (p
, Qnetwork
);
4229 pset_buffer (p
, buffer
);
4230 pset_sentinel (p
, ps
->sentinel
);
4231 pset_filter (p
, ps
->filter
);
4232 pset_command (p
, Qnil
);
4236 pset_status (p
, Qrun
);
4238 /* Client processes for accepted connections are not stopped initially. */
4239 if (!EQ (p
->filter
, Qt
))
4241 FD_SET (s
, &input_wait_mask
);
4242 FD_SET (s
, &non_keyboard_wait_mask
);
4245 if (s
> max_process_desc
)
4246 max_process_desc
= s
;
4248 /* Setup coding system for new process based on server process.
4249 This seems to be the proper thing to do, as the coding system
4250 of the new process should reflect the settings at the time the
4251 server socket was opened; not the current settings. */
4253 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4254 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4255 setup_process_coding_systems (proc
);
4257 pset_decoding_buf (p
, empty_unibyte_string
);
4258 p
->decoding_carryover
= 0;
4259 pset_encoding_buf (p
, empty_unibyte_string
);
4261 p
->inherit_coding_system_flag
4262 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4264 if (!NILP (ps
->log
))
4265 call3 (ps
->log
, server
, proc
,
4266 concat3 (build_string ("accept from "),
4267 (STRINGP (host
) ? host
: build_string ("-")),
4268 build_string ("\n")));
4270 if (!NILP (p
->sentinel
))
4271 exec_sentinel (proc
,
4272 concat3 (build_string ("open from "),
4273 (STRINGP (host
) ? host
: build_string ("-")),
4274 build_string ("\n")));
4277 /* This variable is different from waiting_for_input in keyboard.c.
4278 It is used to communicate to a lisp process-filter/sentinel (via the
4279 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4280 for user-input when that process-filter was called.
4281 waiting_for_input cannot be used as that is by definition 0 when
4282 lisp code is being evalled.
4283 This is also used in record_asynch_buffer_change.
4284 For that purpose, this must be 0
4285 when not inside wait_reading_process_output. */
4286 static int waiting_for_user_input_p
;
4289 wait_reading_process_output_unwind (Lisp_Object data
)
4291 waiting_for_user_input_p
= XINT (data
);
4295 /* This is here so breakpoints can be put on it. */
4297 wait_reading_process_output_1 (void)
4301 /* Read and dispose of subprocess output while waiting for timeout to
4302 elapse and/or keyboard input to be available.
4306 If negative, gobble data immediately available but don't wait for any.
4309 an additional duration to wait, measured in nanoseconds
4310 If TIME_LIMIT is zero, then:
4311 If NSECS == 0, there is no limit.
4312 If NSECS > 0, the timeout consists of NSECS only.
4313 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4316 0 to ignore keyboard input, or
4317 1 to return when input is available, or
4318 -1 meaning caller will actually read the input, so don't throw to
4319 the quit handler, or
4321 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4322 output that arrives.
4324 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4325 (and gobble terminal input into the buffer if any arrives).
4327 If WAIT_PROC is specified, wait until something arrives from that
4328 process. The return value is true if we read some input from
4331 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4332 (suspending output from other processes). A negative value
4333 means don't run any timers either.
4335 If WAIT_PROC is specified, then the function returns true if we
4336 received input from that process before the timeout elapsed.
4337 Otherwise, return true if we received input from any process. */
4340 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4342 Lisp_Object wait_for_cell
,
4343 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4345 register int channel
, nfds
;
4346 SELECT_TYPE Available
;
4347 SELECT_TYPE Writeok
;
4349 int check_delay
, no_avail
;
4352 EMACS_TIME timeout
, end_time
;
4353 int wait_channel
= -1;
4354 int got_some_input
= 0;
4355 ptrdiff_t count
= SPECPDL_INDEX ();
4357 FD_ZERO (&Available
);
4360 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4361 && !(CONSP (wait_proc
->status
)
4362 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4363 message ("Blocking call to accept-process-output with quit inhibited!!");
4365 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4366 if (wait_proc
!= NULL
)
4367 wait_channel
= wait_proc
->infd
;
4369 record_unwind_protect (wait_reading_process_output_unwind
,
4370 make_number (waiting_for_user_input_p
));
4371 waiting_for_user_input_p
= read_kbd
;
4378 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4379 time_limit
= TYPE_MAXIMUM (time_t);
4381 /* Since we may need to wait several times,
4382 compute the absolute time to return at. */
4383 if (time_limit
|| 0 < nsecs
)
4385 timeout
= make_emacs_time (time_limit
, nsecs
);
4386 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4391 int timeout_reduced_for_timers
= 0;
4393 /* If calling from keyboard input, do not quit
4394 since we want to return C-g as an input character.
4395 Otherwise, do pending quit if requested. */
4399 process_pending_signals ();
4401 /* Exit now if the cell we're waiting for became non-nil. */
4402 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4405 /* Compute time from now till when time limit is up */
4406 /* Exit if already run out */
4409 /* A negative timeout means
4410 gobble output available now
4411 but don't wait at all. */
4413 timeout
= make_emacs_time (0, 0);
4415 else if (time_limit
|| 0 < nsecs
)
4417 EMACS_TIME now
= current_emacs_time ();
4418 if (EMACS_TIME_LE (end_time
, now
))
4420 timeout
= sub_emacs_time (end_time
, now
);
4424 timeout
= make_emacs_time (100000, 0);
4427 /* Normally we run timers here.
4428 But not if wait_for_cell; in those cases,
4429 the wait is supposed to be short,
4430 and those callers cannot handle running arbitrary Lisp code here. */
4431 if (NILP (wait_for_cell
)
4432 && just_wait_proc
>= 0)
4434 EMACS_TIME timer_delay
;
4438 int old_timers_run
= timers_run
;
4439 struct buffer
*old_buffer
= current_buffer
;
4440 Lisp_Object old_window
= selected_window
;
4442 timer_delay
= timer_check ();
4444 /* If a timer has run, this might have changed buffers
4445 an alike. Make read_key_sequence aware of that. */
4446 if (timers_run
!= old_timers_run
4447 && (old_buffer
!= current_buffer
4448 || !EQ (old_window
, selected_window
))
4449 && waiting_for_user_input_p
== -1)
4450 record_asynch_buffer_change ();
4452 if (timers_run
!= old_timers_run
&& do_display
)
4453 /* We must retry, since a timer may have requeued itself
4454 and that could alter the time_delay. */
4455 redisplay_preserve_echo_area (9);
4459 while (!detect_input_pending ());
4461 /* If there is unread keyboard input, also return. */
4463 && requeued_events_pending_p ())
4466 /* A negative timeout means do not wait at all. */
4469 if (EMACS_TIME_VALID_P (timer_delay
))
4471 if (EMACS_TIME_LT (timer_delay
, timeout
))
4473 timeout
= timer_delay
;
4474 timeout_reduced_for_timers
= 1;
4479 /* This is so a breakpoint can be put here. */
4480 wait_reading_process_output_1 ();
4485 /* Cause C-g and alarm signals to take immediate action,
4486 and cause input available signals to zero out timeout.
4488 It is important that we do this before checking for process
4489 activity. If we get a SIGCHLD after the explicit checks for
4490 process activity, timeout is the only way we will know. */
4492 set_waiting_for_input (&timeout
);
4494 /* If status of something has changed, and no input is
4495 available, notify the user of the change right away. After
4496 this explicit check, we'll let the SIGCHLD handler zap
4497 timeout to get our attention. */
4498 if (update_tick
!= process_tick
)
4503 if (kbd_on_hold_p ())
4506 Atemp
= input_wait_mask
;
4509 timeout
= make_emacs_time (0, 0);
4510 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4512 #ifdef NON_BLOCKING_CONNECT
4513 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4517 NULL
, &timeout
, NULL
)
4520 /* It's okay for us to do this and then continue with
4521 the loop, since timeout has already been zeroed out. */
4522 clear_waiting_for_input ();
4523 status_notify (NULL
);
4524 if (do_display
) redisplay_preserve_echo_area (13);
4528 /* Don't wait for output from a non-running process. Just
4529 read whatever data has already been received. */
4530 if (wait_proc
&& wait_proc
->raw_status_new
)
4531 update_status (wait_proc
);
4533 && ! EQ (wait_proc
->status
, Qrun
)
4534 && ! EQ (wait_proc
->status
, Qconnect
))
4536 int nread
, total_nread
= 0;
4538 clear_waiting_for_input ();
4539 XSETPROCESS (proc
, wait_proc
);
4541 /* Read data from the process, until we exhaust it. */
4542 while (wait_proc
->infd
>= 0)
4544 nread
= read_process_output (proc
, wait_proc
->infd
);
4551 total_nread
+= nread
;
4555 else if (nread
== -1 && EIO
== errno
)
4559 else if (nread
== -1 && EAGAIN
== errno
)
4563 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4567 if (total_nread
> 0 && do_display
)
4568 redisplay_preserve_echo_area (10);
4573 /* Wait till there is something to do */
4575 if (wait_proc
&& just_wait_proc
)
4577 if (wait_proc
->infd
< 0) /* Terminated */
4579 FD_SET (wait_proc
->infd
, &Available
);
4583 else if (!NILP (wait_for_cell
))
4585 Available
= non_process_wait_mask
;
4592 Available
= non_keyboard_wait_mask
;
4594 Available
= input_wait_mask
;
4595 Writeok
= write_mask
;
4596 #ifdef SELECT_CANT_DO_WRITE_MASK
4601 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4604 /* If frame size has changed or the window is newly mapped,
4605 redisplay now, before we start to wait. There is a race
4606 condition here; if a SIGIO arrives between now and the select
4607 and indicates that a frame is trashed, the select may block
4608 displaying a trashed screen. */
4609 if (frame_garbaged
&& do_display
)
4611 clear_waiting_for_input ();
4612 redisplay_preserve_echo_area (11);
4614 set_waiting_for_input (&timeout
);
4617 /* Skip the `select' call if input is available and we're
4618 waiting for keyboard input or a cell change (which can be
4619 triggered by processing X events). In the latter case, set
4620 nfds to 1 to avoid breaking the loop. */
4622 if ((read_kbd
|| !NILP (wait_for_cell
))
4623 && detect_input_pending ())
4625 nfds
= read_kbd
? 0 : 1;
4632 #ifdef ADAPTIVE_READ_BUFFERING
4633 /* Set the timeout for adaptive read buffering if any
4634 process has non-zero read_output_skip and non-zero
4635 read_output_delay, and we are not reading output for a
4636 specific wait_channel. It is not executed if
4637 Vprocess_adaptive_read_buffering is nil. */
4638 if (process_output_skip
&& check_delay
> 0)
4640 int nsecs
= EMACS_NSECS (timeout
);
4641 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4642 nsecs
= READ_OUTPUT_DELAY_MAX
;
4643 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4645 proc
= chan_process
[channel
];
4648 /* Find minimum non-zero read_output_delay among the
4649 processes with non-zero read_output_skip. */
4650 if (XPROCESS (proc
)->read_output_delay
> 0)
4653 if (!XPROCESS (proc
)->read_output_skip
)
4655 FD_CLR (channel
, &Available
);
4656 XPROCESS (proc
)->read_output_skip
= 0;
4657 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4658 nsecs
= XPROCESS (proc
)->read_output_delay
;
4661 timeout
= make_emacs_time (0, nsecs
);
4662 process_output_skip
= 0;
4665 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4667 #elif defined (HAVE_NS)
4672 (max (max_process_desc
, max_input_desc
) + 1,
4674 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4675 NULL
, &timeout
, NULL
);
4678 /* GnuTLS buffers data internally. In lowat mode it leaves
4679 some data in the TCP buffers so that select works, but
4680 with custom pull/push functions we need to check if some
4681 data is available in the buffers manually. */
4686 /* We're not waiting on a specific process, so loop
4687 through all the channels and check for data.
4688 This is a workaround needed for some versions of
4689 the gnutls library -- 2.12.14 has been confirmed
4691 http://comments.gmane.org/gmane.emacs.devel/145074 */
4692 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4693 if (! NILP (chan_process
[channel
]))
4695 struct Lisp_Process
*p
=
4696 XPROCESS (chan_process
[channel
]);
4697 if (p
&& p
->gnutls_p
&& p
->infd
4698 && ((emacs_gnutls_record_check_pending
4703 FD_SET (p
->infd
, &Available
);
4709 /* Check this specific channel. */
4710 if (wait_proc
->gnutls_p
/* Check for valid process. */
4711 /* Do we have pending data? */
4712 && ((emacs_gnutls_record_check_pending
4713 (wait_proc
->gnutls_state
))
4717 /* Set to Available. */
4718 FD_SET (wait_proc
->infd
, &Available
);
4727 /* Make C-g and alarm signals set flags again */
4728 clear_waiting_for_input ();
4730 /* If we woke up due to SIGWINCH, actually change size now. */
4731 do_pending_window_change (0);
4733 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4734 /* We waited the full specified time, so return now. */
4738 if (xerrno
== EINTR
)
4740 else if (xerrno
== EBADF
)
4743 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4744 the child's closure of the pts gives the parent a SIGHUP, and
4745 the ptc file descriptor is automatically closed,
4746 yielding EBADF here or at select() call above.
4747 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4748 in m/ibmrt-aix.h), and here we just ignore the select error.
4749 Cleanup occurs c/o status_notify after SIGCLD. */
4750 no_avail
= 1; /* Cannot depend on values returned */
4756 error ("select error: %s", emacs_strerror (xerrno
));
4761 FD_ZERO (&Available
);
4765 #if 0 /* When polling is used, interrupt_input is 0,
4766 so get_input_pending should read the input.
4767 So this should not be needed. */
4768 /* If we are using polling for input,
4769 and we see input available, make it get read now.
4770 Otherwise it might not actually get read for a second.
4771 And on hpux, since we turn off polling in wait_reading_process_output,
4772 it might never get read at all if we don't spend much time
4773 outside of wait_reading_process_output. */
4774 if (read_kbd
&& interrupt_input
4775 && keyboard_bit_set (&Available
)
4776 && input_polling_used ())
4777 kill (getpid (), SIGALRM
);
4780 /* Check for keyboard input */
4781 /* If there is any, return immediately
4782 to give it higher priority than subprocesses */
4786 int old_timers_run
= timers_run
;
4787 struct buffer
*old_buffer
= current_buffer
;
4788 Lisp_Object old_window
= selected_window
;
4791 if (detect_input_pending_run_timers (do_display
))
4793 swallow_events (do_display
);
4794 if (detect_input_pending_run_timers (do_display
))
4798 /* If a timer has run, this might have changed buffers
4799 an alike. Make read_key_sequence aware of that. */
4800 if (timers_run
!= old_timers_run
4801 && waiting_for_user_input_p
== -1
4802 && (old_buffer
!= current_buffer
4803 || !EQ (old_window
, selected_window
)))
4804 record_asynch_buffer_change ();
4810 /* If there is unread keyboard input, also return. */
4812 && requeued_events_pending_p ())
4815 /* If we are not checking for keyboard input now,
4816 do process events (but don't run any timers).
4817 This is so that X events will be processed.
4818 Otherwise they may have to wait until polling takes place.
4819 That would causes delays in pasting selections, for example.
4821 (We used to do this only if wait_for_cell.) */
4822 if (read_kbd
== 0 && detect_input_pending ())
4824 swallow_events (do_display
);
4825 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4826 if (detect_input_pending ())
4831 /* Exit now if the cell we're waiting for became non-nil. */
4832 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4836 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4837 go read it. This can happen with X on BSD after logging out.
4838 In that case, there really is no input and no SIGIO,
4839 but select says there is input. */
4841 if (read_kbd
&& interrupt_input
4842 && keyboard_bit_set (&Available
) && ! noninteractive
)
4843 kill (getpid (), SIGIO
);
4847 got_some_input
|= nfds
> 0;
4849 /* If checking input just got us a size-change event from X,
4850 obey it now if we should. */
4851 if (read_kbd
|| ! NILP (wait_for_cell
))
4852 do_pending_window_change (0);
4854 /* Check for data from a process. */
4855 if (no_avail
|| nfds
== 0)
4858 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4860 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4862 && ((d
->condition
& FOR_READ
4863 && FD_ISSET (channel
, &Available
))
4864 || (d
->condition
& FOR_WRITE
4865 && FD_ISSET (channel
, &write_mask
))))
4866 d
->func (channel
, d
->data
);
4869 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4871 if (FD_ISSET (channel
, &Available
)
4872 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4873 && !FD_ISSET (channel
, &non_process_wait_mask
))
4877 /* If waiting for this channel, arrange to return as
4878 soon as no more input to be processed. No more
4880 if (wait_channel
== channel
)
4886 proc
= chan_process
[channel
];
4890 /* If this is a server stream socket, accept connection. */
4891 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4893 server_accept_connection (proc
, channel
);
4897 /* Read data from the process, starting with our
4898 buffered-ahead character if we have one. */
4900 nread
= read_process_output (proc
, channel
);
4903 /* Since read_process_output can run a filter,
4904 which can call accept-process-output,
4905 don't try to read from any other processes
4906 before doing the select again. */
4907 FD_ZERO (&Available
);
4910 redisplay_preserve_echo_area (12);
4913 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4916 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4917 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4919 else if (nread
== -1 && errno
== EAGAIN
)
4923 else if (nread
== -1 && errno
== EAGAIN
)
4925 /* Note that we cannot distinguish between no input
4926 available now and a closed pipe.
4927 With luck, a closed pipe will be accompanied by
4928 subprocess termination and SIGCHLD. */
4929 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4931 #endif /* O_NDELAY */
4932 #endif /* O_NONBLOCK */
4934 /* On some OSs with ptys, when the process on one end of
4935 a pty exits, the other end gets an error reading with
4936 errno = EIO instead of getting an EOF (0 bytes read).
4937 Therefore, if we get an error reading and errno =
4938 EIO, just continue, because the child process has
4939 exited and should clean itself up soon (e.g. when we
4942 However, it has been known to happen that the SIGCHLD
4943 got lost. So raise the signal again just in case.
4945 else if (nread
== -1 && errno
== EIO
)
4947 struct Lisp_Process
*p
= XPROCESS (proc
);
4949 /* Clear the descriptor now, so we only raise the
4951 FD_CLR (channel
, &input_wait_mask
);
4952 FD_CLR (channel
, &non_keyboard_wait_mask
);
4956 /* If the EIO occurs on a pty, the SIGCHLD handler's
4957 waitpid call will not find the process object to
4958 delete. Do it here. */
4959 p
->tick
= ++process_tick
;
4960 pset_status (p
, Qfailed
);
4963 kill (getpid (), SIGCHLD
);
4965 #endif /* HAVE_PTYS */
4966 /* If we can detect process termination, don't consider the
4967 process gone just because its pipe is closed. */
4969 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4974 /* Preserve status of processes already terminated. */
4975 XPROCESS (proc
)->tick
= ++process_tick
;
4976 deactivate_process (proc
);
4977 if (XPROCESS (proc
)->raw_status_new
)
4978 update_status (XPROCESS (proc
));
4979 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4980 pset_status (XPROCESS (proc
),
4981 list2 (Qexit
, make_number (256)));
4984 #ifdef NON_BLOCKING_CONNECT
4985 if (FD_ISSET (channel
, &Writeok
)
4986 && FD_ISSET (channel
, &connect_wait_mask
))
4988 struct Lisp_Process
*p
;
4990 FD_CLR (channel
, &connect_wait_mask
);
4991 FD_CLR (channel
, &write_mask
);
4992 if (--num_pending_connects
< 0)
4995 proc
= chan_process
[channel
];
4999 p
= XPROCESS (proc
);
5002 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5003 So only use it on systems where it is known to work. */
5005 socklen_t xlen
= sizeof (xerrno
);
5006 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5011 struct sockaddr pname
;
5012 int pnamelen
= sizeof (pname
);
5014 /* If connection failed, getpeername will fail. */
5016 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5018 /* Obtain connect failure code through error slippage. */
5021 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5028 p
->tick
= ++process_tick
;
5029 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
5030 deactivate_process (proc
);
5034 pset_status (p
, Qrun
);
5035 /* Execute the sentinel here. If we had relied on
5036 status_notify to do it later, it will read input
5037 from the process before calling the sentinel. */
5038 exec_sentinel (proc
, build_string ("open\n"));
5039 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5041 FD_SET (p
->infd
, &input_wait_mask
);
5042 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5046 #endif /* NON_BLOCKING_CONNECT */
5047 } /* end for each file descriptor */
5048 } /* end while exit conditions not met */
5050 unbind_to (count
, Qnil
);
5052 /* If calling from keyboard input, do not quit
5053 since we want to return C-g as an input character.
5054 Otherwise, do pending quit if requested. */
5057 /* Prevent input_pending from remaining set if we quit. */
5058 clear_input_pending ();
5062 return got_some_input
;
5065 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5068 read_process_output_call (Lisp_Object fun_and_args
)
5070 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5074 read_process_output_error_handler (Lisp_Object error_val
)
5076 cmd_error_internal (error_val
, "error in process filter: ");
5078 update_echo_area ();
5079 Fsleep_for (make_number (2), Qnil
);
5083 /* Read pending output from the process channel,
5084 starting with our buffered-ahead character if we have one.
5085 Yield number of decoded characters read.
5087 This function reads at most 4096 characters.
5088 If you want to read all available subprocess output,
5089 you must call it repeatedly until it returns zero.
5091 The characters read are decoded according to PROC's coding-system
5095 read_process_output (Lisp_Object proc
, register int channel
)
5097 register ssize_t nbytes
;
5099 register Lisp_Object outstream
;
5100 register struct Lisp_Process
*p
= XPROCESS (proc
);
5101 register ptrdiff_t opoint
;
5102 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5103 int carryover
= p
->decoding_carryover
;
5105 ptrdiff_t count
= SPECPDL_INDEX ();
5106 Lisp_Object odeactivate
;
5108 chars
= alloca (carryover
+ readmax
);
5110 /* See the comment above. */
5111 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5113 #ifdef DATAGRAM_SOCKETS
5114 /* We have a working select, so proc_buffered_char is always -1. */
5115 if (DATAGRAM_CHAN_P (channel
))
5117 socklen_t len
= datagram_address
[channel
].len
;
5118 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5119 0, datagram_address
[channel
].sa
, &len
);
5124 int buffered
= 0 <= proc_buffered_char
[channel
];
5127 chars
[carryover
] = proc_buffered_char
[channel
];
5128 proc_buffered_char
[channel
] = -1;
5132 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5133 readmax
- buffered
);
5136 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5137 readmax
- buffered
);
5138 #ifdef ADAPTIVE_READ_BUFFERING
5139 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5141 int delay
= p
->read_output_delay
;
5144 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5147 process_output_delay_count
++;
5148 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5151 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5153 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5155 process_output_delay_count
--;
5157 p
->read_output_delay
= delay
;
5160 p
->read_output_skip
= 1;
5161 process_output_skip
= 1;
5166 nbytes
+= buffered
&& nbytes
<= 0;
5169 p
->decoding_carryover
= 0;
5171 /* At this point, NBYTES holds number of bytes just received
5172 (including the one in proc_buffered_char[channel]). */
5175 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5177 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5180 /* Now set NBYTES how many bytes we must decode. */
5181 nbytes
+= carryover
;
5183 odeactivate
= Vdeactivate_mark
;
5184 /* There's no good reason to let process filters change the current
5185 buffer, and many callers of accept-process-output, sit-for, and
5186 friends don't expect current-buffer to be changed from under them. */
5187 record_unwind_current_buffer ();
5189 /* Read and dispose of the process output. */
5190 outstream
= p
->filter
;
5191 if (!NILP (outstream
))
5194 bool outer_running_asynch_code
= running_asynch_code
;
5195 int waiting
= waiting_for_user_input_p
;
5197 /* No need to gcpro these, because all we do with them later
5198 is test them for EQness, and none of them should be a string. */
5200 Lisp_Object obuffer
, okeymap
;
5201 XSETBUFFER (obuffer
, current_buffer
);
5202 okeymap
= BVAR (current_buffer
, keymap
);
5205 /* We inhibit quit here instead of just catching it so that
5206 hitting ^G when a filter happens to be running won't screw
5208 specbind (Qinhibit_quit
, Qt
);
5209 specbind (Qlast_nonmenu_event
, Qt
);
5211 /* In case we get recursively called,
5212 and we already saved the match data nonrecursively,
5213 save the same match data in safely recursive fashion. */
5214 if (outer_running_asynch_code
)
5217 /* Don't clobber the CURRENT match data, either! */
5218 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5219 restore_search_regs ();
5220 record_unwind_save_match_data ();
5221 Fset_match_data (tem
, Qt
);
5224 /* For speed, if a search happens within this code,
5225 save the match data in a special nonrecursive fashion. */
5226 running_asynch_code
= 1;
5228 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5229 text
= coding
->dst_object
;
5230 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5231 /* A new coding system might be found. */
5232 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5234 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5236 /* Don't call setup_coding_system for
5237 proc_decode_coding_system[channel] here. It is done in
5238 detect_coding called via decode_coding above. */
5240 /* If a coding system for encoding is not yet decided, we set
5241 it as the same as coding-system for decoding.
5243 But, before doing that we must check if
5244 proc_encode_coding_system[p->outfd] surely points to a
5245 valid memory because p->outfd will be changed once EOF is
5246 sent to the process. */
5247 if (NILP (p
->encode_coding_system
)
5248 && proc_encode_coding_system
[p
->outfd
])
5250 pset_encode_coding_system
5251 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5252 setup_coding_system (p
->encode_coding_system
,
5253 proc_encode_coding_system
[p
->outfd
]);
5257 if (coding
->carryover_bytes
> 0)
5259 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5260 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5261 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5262 coding
->carryover_bytes
);
5263 p
->decoding_carryover
= coding
->carryover_bytes
;
5265 if (SBYTES (text
) > 0)
5266 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5267 sometimes it's simply wrong to wrap (e.g. when called from
5268 accept-process-output). */
5269 internal_condition_case_1 (read_process_output_call
,
5271 Fcons (proc
, Fcons (text
, Qnil
))),
5272 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5273 read_process_output_error_handler
);
5275 /* If we saved the match data nonrecursively, restore it now. */
5276 restore_search_regs ();
5277 running_asynch_code
= outer_running_asynch_code
;
5279 /* Restore waiting_for_user_input_p as it was
5280 when we were called, in case the filter clobbered it. */
5281 waiting_for_user_input_p
= waiting
;
5283 #if 0 /* Call record_asynch_buffer_change unconditionally,
5284 because we might have changed minor modes or other things
5285 that affect key bindings. */
5286 if (! EQ (Fcurrent_buffer (), obuffer
)
5287 || ! EQ (current_buffer
->keymap
, okeymap
))
5289 /* But do it only if the caller is actually going to read events.
5290 Otherwise there's no need to make him wake up, and it could
5291 cause trouble (for example it would make sit_for return). */
5292 if (waiting_for_user_input_p
== -1)
5293 record_asynch_buffer_change ();
5296 /* If no filter, write into buffer if it isn't dead. */
5297 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5299 Lisp_Object old_read_only
;
5300 ptrdiff_t old_begv
, old_zv
;
5301 ptrdiff_t old_begv_byte
, old_zv_byte
;
5302 ptrdiff_t before
, before_byte
;
5303 ptrdiff_t opoint_byte
;
5307 Fset_buffer (p
->buffer
);
5309 opoint_byte
= PT_BYTE
;
5310 old_read_only
= BVAR (current_buffer
, read_only
);
5313 old_begv_byte
= BEGV_BYTE
;
5314 old_zv_byte
= ZV_BYTE
;
5316 bset_read_only (current_buffer
, Qnil
);
5318 /* Insert new output into buffer
5319 at the current end-of-output marker,
5320 thus preserving logical ordering of input and output. */
5321 if (XMARKER (p
->mark
)->buffer
)
5322 SET_PT_BOTH (clip_to_bounds (BEGV
,
5323 marker_position (p
->mark
), ZV
),
5324 clip_to_bounds (BEGV_BYTE
,
5325 marker_byte_position (p
->mark
),
5328 SET_PT_BOTH (ZV
, ZV_BYTE
);
5330 before_byte
= PT_BYTE
;
5332 /* If the output marker is outside of the visible region, save
5333 the restriction and widen. */
5334 if (! (BEGV
<= PT
&& PT
<= ZV
))
5337 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5338 text
= coding
->dst_object
;
5339 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5340 /* A new coding system might be found. See the comment in the
5341 similar code in the previous `if' block. */
5342 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5344 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5345 if (NILP (p
->encode_coding_system
)
5346 && proc_encode_coding_system
[p
->outfd
])
5348 pset_encode_coding_system
5349 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5350 setup_coding_system (p
->encode_coding_system
,
5351 proc_encode_coding_system
[p
->outfd
]);
5354 if (coding
->carryover_bytes
> 0)
5356 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5357 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5358 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5359 coding
->carryover_bytes
);
5360 p
->decoding_carryover
= coding
->carryover_bytes
;
5362 /* Adjust the multibyteness of TEXT to that of the buffer. */
5363 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5364 != ! STRING_MULTIBYTE (text
))
5365 text
= (STRING_MULTIBYTE (text
)
5366 ? Fstring_as_unibyte (text
)
5367 : Fstring_to_multibyte (text
));
5368 /* Insert before markers in case we are inserting where
5369 the buffer's mark is, and the user's next command is Meta-y. */
5370 insert_from_string_before_markers (text
, 0, 0,
5371 SCHARS (text
), SBYTES (text
), 0);
5373 /* Make sure the process marker's position is valid when the
5374 process buffer is changed in the signal_after_change above.
5375 W3 is known to do that. */
5376 if (BUFFERP (p
->buffer
)
5377 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5378 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5380 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5382 update_mode_lines
++;
5384 /* Make sure opoint and the old restrictions
5385 float ahead of any new text just as point would. */
5386 if (opoint
>= before
)
5388 opoint
+= PT
- before
;
5389 opoint_byte
+= PT_BYTE
- before_byte
;
5391 if (old_begv
> before
)
5393 old_begv
+= PT
- before
;
5394 old_begv_byte
+= PT_BYTE
- before_byte
;
5396 if (old_zv
>= before
)
5398 old_zv
+= PT
- before
;
5399 old_zv_byte
+= PT_BYTE
- before_byte
;
5402 /* If the restriction isn't what it should be, set it. */
5403 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5404 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5407 bset_read_only (current_buffer
, old_read_only
);
5408 SET_PT_BOTH (opoint
, opoint_byte
);
5410 /* Handling the process output should not deactivate the mark. */
5411 Vdeactivate_mark
= odeactivate
;
5413 unbind_to (count
, Qnil
);
5417 /* Sending data to subprocess */
5419 static sys_jmp_buf send_process_frame
;
5420 static Lisp_Object process_sent_to
;
5422 static _Noreturn
void
5423 handle_pipe_signal (int sig
)
5426 sigemptyset (&unblocked
);
5427 sigaddset (&unblocked
, SIGPIPE
);
5428 pthread_sigmask (SIG_UNBLOCK
, &unblocked
, 0);
5429 sys_longjmp (send_process_frame
, 1);
5433 deliver_pipe_signal (int sig
)
5435 handle_on_main_thread (sig
, handle_pipe_signal
);
5438 /* In send_process, when a write fails temporarily,
5439 wait_reading_process_output is called. It may execute user code,
5440 e.g. timers, that attempts to write new data to the same process.
5441 We must ensure that data is sent in the right order, and not
5442 interspersed half-completed with other writes (Bug#10815). This is
5443 handled by the write_queue element of struct process. It is a list
5444 with each entry having the form
5446 (string . (offset . length))
5448 where STRING is a lisp string, OFFSET is the offset into the
5449 string's byte sequence from which we should begin to send, and
5450 LENGTH is the number of bytes left to send. */
5452 /* Create a new entry in write_queue.
5453 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5454 BUF is a pointer to the string sequence of the input_obj or a C
5455 string in case of Qt or Qnil. */
5458 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5459 const char *buf
, ptrdiff_t len
, int front
)
5462 Lisp_Object entry
, obj
;
5464 if (STRINGP (input_obj
))
5466 offset
= buf
- SSDATA (input_obj
);
5472 obj
= make_unibyte_string (buf
, len
);
5475 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5478 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5480 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5483 /* Remove the first element in the write_queue of process P, put its
5484 contents in OBJ, BUF and LEN, and return non-zero. If the
5485 write_queue is empty, return zero. */
5488 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5489 const char **buf
, ptrdiff_t *len
)
5491 Lisp_Object entry
, offset_length
;
5494 if (NILP (p
->write_queue
))
5497 entry
= XCAR (p
->write_queue
);
5498 pset_write_queue (p
, XCDR (p
->write_queue
));
5500 *obj
= XCAR (entry
);
5501 offset_length
= XCDR (entry
);
5503 *len
= XINT (XCDR (offset_length
));
5504 offset
= XINT (XCAR (offset_length
));
5505 *buf
= SSDATA (*obj
) + offset
;
5510 /* Send some data to process PROC.
5511 BUF is the beginning of the data; LEN is the number of characters.
5512 OBJECT is the Lisp object that the data comes from. If OBJECT is
5513 nil or t, it means that the data comes from C string.
5515 If OBJECT is not nil, the data is encoded by PROC's coding-system
5516 for encoding before it is sent.
5518 This function can evaluate Lisp code and can garbage collect. */
5521 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5522 volatile ptrdiff_t len
, volatile Lisp_Object object
)
5524 /* Use volatile to protect variables from being clobbered by longjmp. */
5525 struct Lisp_Process
*p
= XPROCESS (proc
);
5527 struct coding_system
*coding
;
5528 struct sigaction old_sigpipe_action
;
5530 if (p
->raw_status_new
)
5532 if (! EQ (p
->status
, Qrun
))
5533 error ("Process %s not running", SDATA (p
->name
));
5535 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5537 coding
= proc_encode_coding_system
[p
->outfd
];
5538 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5540 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5541 || (BUFFERP (object
)
5542 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5545 pset_encode_coding_system
5546 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5547 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5549 /* The coding system for encoding was changed to raw-text
5550 because we sent a unibyte text previously. Now we are
5551 sending a multibyte text, thus we must encode it by the
5552 original coding system specified for the current process.
5554 Another reason we come here is that the coding system
5555 was just complemented and a new one was returned by
5556 complement_process_encoding_system. */
5557 setup_coding_system (p
->encode_coding_system
, coding
);
5558 Vlast_coding_system_used
= p
->encode_coding_system
;
5560 coding
->src_multibyte
= 1;
5564 coding
->src_multibyte
= 0;
5565 /* For sending a unibyte text, character code conversion should
5566 not take place but EOL conversion should. So, setup raw-text
5567 or one of the subsidiary if we have not yet done it. */
5568 if (CODING_REQUIRE_ENCODING (coding
))
5570 if (CODING_REQUIRE_FLUSHING (coding
))
5572 /* But, before changing the coding, we must flush out data. */
5573 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5574 send_process (proc
, "", 0, Qt
);
5575 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5577 setup_coding_system (raw_text_coding_system
5578 (Vlast_coding_system_used
),
5580 coding
->src_multibyte
= 0;
5583 coding
->dst_multibyte
= 0;
5585 if (CODING_REQUIRE_ENCODING (coding
))
5587 coding
->dst_object
= Qt
;
5588 if (BUFFERP (object
))
5590 ptrdiff_t from_byte
, from
, to
;
5591 ptrdiff_t save_pt
, save_pt_byte
;
5592 struct buffer
*cur
= current_buffer
;
5594 set_buffer_internal (XBUFFER (object
));
5595 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5597 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5598 from
= BYTE_TO_CHAR (from_byte
);
5599 to
= BYTE_TO_CHAR (from_byte
+ len
);
5600 TEMP_SET_PT_BOTH (from
, from_byte
);
5601 encode_coding_object (coding
, object
, from
, from_byte
,
5602 to
, from_byte
+ len
, Qt
);
5603 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5604 set_buffer_internal (cur
);
5606 else if (STRINGP (object
))
5608 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5609 SBYTES (object
), Qt
);
5613 coding
->dst_object
= make_unibyte_string (buf
, len
);
5614 coding
->produced
= len
;
5617 len
= coding
->produced
;
5618 object
= coding
->dst_object
;
5619 buf
= SSDATA (object
);
5622 if (pty_max_bytes
== 0)
5624 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5625 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5626 if (pty_max_bytes
< 0)
5627 pty_max_bytes
= 250;
5629 pty_max_bytes
= 250;
5631 /* Deduct one, to leave space for the eof. */
5635 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5636 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5637 when returning with longjmp despite being declared volatile. */
5638 if (!sys_setjmp (send_process_frame
))
5640 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5641 process_sent_to
= proc
;
5643 /* If there is already data in the write_queue, put the new data
5644 in the back of queue. Otherwise, ignore it. */
5645 if (!NILP (p
->write_queue
))
5646 write_queue_push (p
, object
, buf
, len
, 0);
5648 do /* while !NILP (p->write_queue) */
5650 ptrdiff_t cur_len
= -1;
5651 const char *cur_buf
;
5652 Lisp_Object cur_object
;
5654 /* If write_queue is empty, ignore it. */
5655 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5659 cur_object
= object
;
5664 /* Send this batch, using one or more write calls. */
5665 ptrdiff_t written
= 0;
5666 int outfd
= p
->outfd
;
5667 struct sigaction action
;
5668 emacs_sigaction_init (&action
, deliver_pipe_signal
);
5669 sigaction (SIGPIPE
, &action
, &old_sigpipe_action
);
5670 #ifdef DATAGRAM_SOCKETS
5671 if (DATAGRAM_CHAN_P (outfd
))
5673 rv
= sendto (outfd
, cur_buf
, cur_len
,
5674 0, datagram_address
[outfd
].sa
,
5675 datagram_address
[outfd
].len
);
5678 else if (errno
== EMSGSIZE
)
5680 sigaction (SIGPIPE
, &old_sigpipe_action
, 0);
5681 report_file_error ("sending datagram",
5682 Fcons (proc
, Qnil
));
5690 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5693 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5694 rv
= (written
? 0 : -1);
5695 #ifdef ADAPTIVE_READ_BUFFERING
5696 if (p
->read_output_delay
> 0
5697 && p
->adaptive_read_buffering
== 1)
5699 p
->read_output_delay
= 0;
5700 process_output_delay_count
--;
5701 p
->read_output_skip
= 0;
5705 sigaction (SIGPIPE
, &old_sigpipe_action
, 0);
5711 || errno
== EWOULDBLOCK
5717 /* Buffer is full. Wait, accepting input;
5718 that may allow the program
5719 to finish doing output and read more. */
5721 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5722 /* A gross hack to work around a bug in FreeBSD.
5723 In the following sequence, read(2) returns
5727 write(2) 954 bytes, get EAGAIN
5728 read(2) 1024 bytes in process_read_output
5729 read(2) 11 bytes in process_read_output
5731 That is, read(2) returns more bytes than have
5732 ever been written successfully. The 1033 bytes
5733 read are the 1022 bytes written successfully
5734 after processing (for example with CRs added if
5735 the terminal is set up that way which it is
5736 here). The same bytes will be seen again in a
5737 later read(2), without the CRs. */
5739 if (errno
== EAGAIN
)
5742 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5744 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5746 /* Put what we should have written in wait_queue. */
5747 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5748 wait_reading_process_output (0, 20 * 1000 * 1000,
5749 0, 0, Qnil
, NULL
, 0);
5750 /* Reread queue, to see what is left. */
5754 /* This is a real error. */
5755 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5761 while (!NILP (p
->write_queue
));
5765 sigaction (SIGPIPE
, &old_sigpipe_action
, 0);
5766 proc
= process_sent_to
;
5767 p
= XPROCESS (proc
);
5768 p
->raw_status_new
= 0;
5769 pset_status (p
, Fcons (Qexit
, Fcons (make_number (256), Qnil
)));
5770 p
->tick
= ++process_tick
;
5771 deactivate_process (proc
);
5772 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5776 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5778 doc
: /* Send current contents of region as input to PROCESS.
5779 PROCESS may be a process, a buffer, the name of a process or buffer, or
5780 nil, indicating the current buffer's process.
5781 Called from program, takes three arguments, PROCESS, START and END.
5782 If the region is more than 500 characters long,
5783 it is sent in several bunches. This may happen even for shorter regions.
5784 Output from processes can arrive in between bunches. */)
5785 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5788 ptrdiff_t start1
, end1
;
5790 proc
= get_process (process
);
5791 validate_region (&start
, &end
);
5793 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5794 move_gap (XINT (start
));
5796 start1
= CHAR_TO_BYTE (XINT (start
));
5797 end1
= CHAR_TO_BYTE (XINT (end
));
5798 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5799 Fcurrent_buffer ());
5804 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5806 doc
: /* Send PROCESS the contents of STRING as input.
5807 PROCESS may be a process, a buffer, the name of a process or buffer, or
5808 nil, indicating the current buffer's process.
5809 If STRING is more than 500 characters long,
5810 it is sent in several bunches. This may happen even for shorter strings.
5811 Output from processes can arrive in between bunches. */)
5812 (Lisp_Object process
, Lisp_Object string
)
5815 CHECK_STRING (string
);
5816 proc
= get_process (process
);
5817 send_process (proc
, SSDATA (string
),
5818 SBYTES (string
), string
);
5822 /* Return the foreground process group for the tty/pty that
5823 the process P uses. */
5825 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5830 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5833 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5834 master side. Try the slave side. */
5835 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5839 ioctl (fd
, TIOCGPGRP
, &gid
);
5843 #endif /* defined (TIOCGPGRP ) */
5848 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5849 Sprocess_running_child_p
, 0, 1, 0,
5850 doc
: /* Return t if PROCESS has given the terminal to a child.
5851 If the operating system does not make it possible to find out,
5852 return t unconditionally. */)
5853 (Lisp_Object process
)
5855 /* Initialize in case ioctl doesn't exist or gives an error,
5856 in a way that will cause returning t. */
5859 struct Lisp_Process
*p
;
5861 proc
= get_process (process
);
5862 p
= XPROCESS (proc
);
5864 if (!EQ (p
->type
, Qreal
))
5865 error ("Process %s is not a subprocess",
5868 error ("Process %s is not active",
5871 gid
= emacs_get_tty_pgrp (p
);
5878 /* send a signal number SIGNO to PROCESS.
5879 If CURRENT_GROUP is t, that means send to the process group
5880 that currently owns the terminal being used to communicate with PROCESS.
5881 This is used for various commands in shell mode.
5882 If CURRENT_GROUP is lambda, that means send to the process group
5883 that currently owns the terminal, but only if it is NOT the shell itself.
5885 If NOMSG is zero, insert signal-announcements into process's buffers
5888 If we can, we try to signal PROCESS by sending control characters
5889 down the pty. This allows us to signal inferiors who have changed
5890 their uid, for which killpg would return an EPERM error. */
5893 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5897 register struct Lisp_Process
*p
;
5901 proc
= get_process (process
);
5902 p
= XPROCESS (proc
);
5904 if (!EQ (p
->type
, Qreal
))
5905 error ("Process %s is not a subprocess",
5908 error ("Process %s is not active",
5912 current_group
= Qnil
;
5914 /* If we are using pgrps, get a pgrp number and make it negative. */
5915 if (NILP (current_group
))
5916 /* Send the signal to the shell's process group. */
5920 #ifdef SIGNALS_VIA_CHARACTERS
5921 /* If possible, send signals to the entire pgrp
5922 by sending an input character to it. */
5925 cc_t
*sig_char
= NULL
;
5927 tcgetattr (p
->infd
, &t
);
5932 sig_char
= &t
.c_cc
[VINTR
];
5936 sig_char
= &t
.c_cc
[VQUIT
];
5940 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5941 sig_char
= &t
.c_cc
[VSWTCH
];
5943 sig_char
= &t
.c_cc
[VSUSP
];
5948 if (sig_char
&& *sig_char
!= CDISABLE
)
5950 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5953 /* If we can't send the signal with a character,
5954 fall through and send it another way. */
5956 /* The code above may fall through if it can't
5957 handle the signal. */
5958 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5961 /* Get the current pgrp using the tty itself, if we have that.
5962 Otherwise, use the pty to get the pgrp.
5963 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5964 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5965 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5966 His patch indicates that if TIOCGPGRP returns an error, then
5967 we should just assume that p->pid is also the process group id. */
5969 gid
= emacs_get_tty_pgrp (p
);
5972 /* If we can't get the information, assume
5973 the shell owns the tty. */
5976 /* It is not clear whether anything really can set GID to -1.
5977 Perhaps on some system one of those ioctls can or could do so.
5978 Or perhaps this is vestigial. */
5981 #else /* ! defined (TIOCGPGRP ) */
5982 /* Can't select pgrps on this system, so we know that
5983 the child itself heads the pgrp. */
5985 #endif /* ! defined (TIOCGPGRP ) */
5987 /* If current_group is lambda, and the shell owns the terminal,
5988 don't send any signal. */
5989 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5997 p
->raw_status_new
= 0;
5998 pset_status (p
, Qrun
);
5999 p
->tick
= ++process_tick
;
6002 status_notify (NULL
);
6003 redisplay_preserve_echo_area (13);
6006 #endif /* ! defined (SIGCONT) */
6010 flush_pending_output (p
->infd
);
6014 /* If we don't have process groups, send the signal to the immediate
6015 subprocess. That isn't really right, but it's better than any
6016 obvious alternative. */
6019 kill (p
->pid
, signo
);
6023 /* gid may be a pid, or minus a pgrp's number */
6025 if (!NILP (current_group
))
6027 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6028 EMACS_KILLPG (gid
, signo
);
6035 #else /* ! defined (TIOCSIGSEND) */
6036 EMACS_KILLPG (gid
, signo
);
6037 #endif /* ! defined (TIOCSIGSEND) */
6040 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6041 doc
: /* Interrupt process PROCESS.
6042 PROCESS may be a process, a buffer, or the name of a process or buffer.
6043 No arg or nil means current buffer's process.
6044 Second arg CURRENT-GROUP non-nil means send signal to
6045 the current process-group of the process's controlling terminal
6046 rather than to the process's own process group.
6047 If the process is a shell, this means interrupt current subjob
6048 rather than the shell.
6050 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6051 don't send the signal. */)
6052 (Lisp_Object process
, Lisp_Object current_group
)
6054 process_send_signal (process
, SIGINT
, current_group
, 0);
6058 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6059 doc
: /* Kill process PROCESS. May be process or name of one.
6060 See function `interrupt-process' for more details on usage. */)
6061 (Lisp_Object process
, Lisp_Object current_group
)
6063 process_send_signal (process
, SIGKILL
, current_group
, 0);
6067 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6068 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6069 See function `interrupt-process' for more details on usage. */)
6070 (Lisp_Object process
, Lisp_Object current_group
)
6072 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6076 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6077 doc
: /* Stop process PROCESS. May be process or name of one.
6078 See function `interrupt-process' for more details on usage.
6079 If PROCESS is a network or serial process, inhibit handling of incoming
6081 (Lisp_Object process
, Lisp_Object current_group
)
6083 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6085 struct Lisp_Process
*p
;
6087 p
= XPROCESS (process
);
6088 if (NILP (p
->command
)
6091 FD_CLR (p
->infd
, &input_wait_mask
);
6092 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6094 pset_command (p
, Qt
);
6098 error ("No SIGTSTP support");
6100 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6105 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6106 doc
: /* Continue process PROCESS. May be process or name of one.
6107 See function `interrupt-process' for more details on usage.
6108 If PROCESS is a network or serial process, resume handling of incoming
6110 (Lisp_Object process
, Lisp_Object current_group
)
6112 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6114 struct Lisp_Process
*p
;
6116 p
= XPROCESS (process
);
6117 if (EQ (p
->command
, Qt
)
6119 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6121 FD_SET (p
->infd
, &input_wait_mask
);
6122 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6124 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6125 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6126 #else /* not WINDOWSNT */
6127 tcflush (p
->infd
, TCIFLUSH
);
6128 #endif /* not WINDOWSNT */
6130 pset_command (p
, Qnil
);
6134 process_send_signal (process
, SIGCONT
, current_group
, 0);
6136 error ("No SIGCONT support");
6141 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6142 2, 2, "sProcess (name or number): \nnSignal code: ",
6143 doc
: /* Send PROCESS the signal with code SIGCODE.
6144 PROCESS may also be a number specifying the process id of the
6145 process to signal; in this case, the process need not be a child of
6147 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6148 (Lisp_Object process
, Lisp_Object sigcode
)
6152 if (STRINGP (process
))
6154 Lisp_Object tem
= Fget_process (process
);
6157 Lisp_Object process_number
=
6158 string_to_number (SSDATA (process
), 10, 1);
6159 if (INTEGERP (process_number
) || FLOATP (process_number
))
6160 tem
= process_number
;
6164 else if (!NUMBERP (process
))
6165 process
= get_process (process
);
6170 if (NUMBERP (process
))
6171 CONS_TO_INTEGER (process
, pid_t
, pid
);
6174 CHECK_PROCESS (process
);
6175 pid
= XPROCESS (process
)->pid
;
6177 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6180 #define parse_signal(NAME, VALUE) \
6181 else if (!xstrcasecmp (name, NAME)) \
6182 XSETINT (sigcode, VALUE)
6184 if (INTEGERP (sigcode
))
6185 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6190 CHECK_SYMBOL (sigcode
);
6191 name
= SSDATA (SYMBOL_NAME (sigcode
));
6193 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6199 parse_signal ("usr1", SIGUSR1
);
6202 parse_signal ("usr2", SIGUSR2
);
6205 parse_signal ("term", SIGTERM
);
6208 parse_signal ("hup", SIGHUP
);
6211 parse_signal ("int", SIGINT
);
6214 parse_signal ("quit", SIGQUIT
);
6217 parse_signal ("ill", SIGILL
);
6220 parse_signal ("abrt", SIGABRT
);
6223 parse_signal ("emt", SIGEMT
);
6226 parse_signal ("kill", SIGKILL
);
6229 parse_signal ("fpe", SIGFPE
);
6232 parse_signal ("bus", SIGBUS
);
6235 parse_signal ("segv", SIGSEGV
);
6238 parse_signal ("sys", SIGSYS
);
6241 parse_signal ("pipe", SIGPIPE
);
6244 parse_signal ("alrm", SIGALRM
);
6247 parse_signal ("urg", SIGURG
);
6250 parse_signal ("stop", SIGSTOP
);
6253 parse_signal ("tstp", SIGTSTP
);
6256 parse_signal ("cont", SIGCONT
);
6259 parse_signal ("chld", SIGCHLD
);
6262 parse_signal ("ttin", SIGTTIN
);
6265 parse_signal ("ttou", SIGTTOU
);
6268 parse_signal ("io", SIGIO
);
6271 parse_signal ("xcpu", SIGXCPU
);
6274 parse_signal ("xfsz", SIGXFSZ
);
6277 parse_signal ("vtalrm", SIGVTALRM
);
6280 parse_signal ("prof", SIGPROF
);
6283 parse_signal ("winch", SIGWINCH
);
6286 parse_signal ("info", SIGINFO
);
6289 error ("Undefined signal name %s", name
);
6294 return make_number (kill (pid
, XINT (sigcode
)));
6297 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6298 doc
: /* Make PROCESS see end-of-file in its input.
6299 EOF comes after any text already sent to it.
6300 PROCESS may be a process, a buffer, the name of a process or buffer, or
6301 nil, indicating the current buffer's process.
6302 If PROCESS is a network connection, or is a process communicating
6303 through a pipe (as opposed to a pty), then you cannot send any more
6304 text to PROCESS after you call this function.
6305 If PROCESS is a serial process, wait until all output written to the
6306 process has been transmitted to the serial port. */)
6307 (Lisp_Object process
)
6310 struct coding_system
*coding
;
6312 if (DATAGRAM_CONN_P (process
))
6315 proc
= get_process (process
);
6316 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6318 /* Make sure the process is really alive. */
6319 if (XPROCESS (proc
)->raw_status_new
)
6320 update_status (XPROCESS (proc
));
6321 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6322 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6324 if (CODING_REQUIRE_FLUSHING (coding
))
6326 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6327 send_process (proc
, "", 0, Qnil
);
6330 if (XPROCESS (proc
)->pty_flag
)
6331 send_process (proc
, "\004", 1, Qnil
);
6332 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6335 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6336 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6337 #endif /* not WINDOWSNT */
6338 /* Do nothing on Windows because writes are blocking. */
6342 int old_outfd
, new_outfd
;
6344 #ifdef HAVE_SHUTDOWN
6345 /* If this is a network connection, or socketpair is used
6346 for communication with the subprocess, call shutdown to cause EOF.
6347 (In some old system, shutdown to socketpair doesn't work.
6348 Then we just can't win.) */
6349 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6350 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6351 shutdown (XPROCESS (proc
)->outfd
, 1);
6352 /* In case of socketpair, outfd == infd, so don't close it. */
6353 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6354 emacs_close (XPROCESS (proc
)->outfd
);
6355 #else /* not HAVE_SHUTDOWN */
6356 emacs_close (XPROCESS (proc
)->outfd
);
6357 #endif /* not HAVE_SHUTDOWN */
6358 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6361 old_outfd
= XPROCESS (proc
)->outfd
;
6363 if (!proc_encode_coding_system
[new_outfd
])
6364 proc_encode_coding_system
[new_outfd
]
6365 = xmalloc (sizeof (struct coding_system
));
6366 *proc_encode_coding_system
[new_outfd
]
6367 = *proc_encode_coding_system
[old_outfd
];
6368 memset (proc_encode_coding_system
[old_outfd
], 0,
6369 sizeof (struct coding_system
));
6371 XPROCESS (proc
)->outfd
= new_outfd
;
6376 /* On receipt of a signal that a child status has changed, loop asking
6377 about children with changed statuses until the system says there
6380 All we do is change the status; we do not run sentinels or print
6381 notifications. That is saved for the next time keyboard input is
6382 done, in order to avoid timing errors.
6384 ** WARNING: this can be called during garbage collection.
6385 Therefore, it must not be fooled by the presence of mark bits in
6388 ** USG WARNING: Although it is not obvious from the documentation
6389 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6390 signal() before executing at least one wait(), otherwise the
6391 handler will be called again, resulting in an infinite loop. The
6392 relevant portion of the documentation reads "SIGCLD signals will be
6393 queued and the signal-catching function will be continually
6394 reentered until the queue is empty". Invoking signal() causes the
6395 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6398 ** Malloc WARNING: This should never call malloc either directly or
6399 indirectly; if it does, that is a bug */
6403 /* Record one child's changed status. Return true if a child was found. */
6405 record_child_status_change (void)
6408 struct Lisp_Process
*p
;
6414 pid
= waitpid (-1, &w
, WNOHANG
| WUNTRACED
);
6415 while (pid
< 0 && errno
== EINTR
);
6417 /* PID == 0 means no processes found, PID == -1 means a real failure.
6418 Either way, we have done all our job. */
6422 /* Find the process that signaled us, and record its status. */
6424 /* The process can have been deleted by Fdelete_process. */
6425 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6427 Lisp_Object xpid
= XCAR (tail
);
6428 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6429 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6431 XSETCAR (tail
, Qnil
);
6436 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6438 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6440 proc
= XCDR (XCAR (tail
));
6441 p
= XPROCESS (proc
);
6442 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6447 /* Look for an asynchronous process whose pid hasn't been filled
6450 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6452 proc
= XCDR (XCAR (tail
));
6453 p
= XPROCESS (proc
);
6459 /* Change the status of the process that was found. */
6462 int clear_desc_flag
= 0;
6464 p
->tick
= ++process_tick
;
6466 p
->raw_status_new
= 1;
6468 /* If process has terminated, stop waiting for its output. */
6469 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6471 clear_desc_flag
= 1;
6473 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6474 if (clear_desc_flag
)
6476 FD_CLR (p
->infd
, &input_wait_mask
);
6477 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6480 /* Tell wait_reading_process_output that it needs to wake up and
6482 if (input_available_clear_time
)
6483 *input_available_clear_time
= make_emacs_time (0, 0);
6485 /* There was no asynchronous process found for that pid: we have
6486 a synchronous process. */
6489 synch_process_alive
= 0;
6491 /* Report the status of the synchronous process. */
6493 synch_process_retcode
= WEXITSTATUS (w
);
6494 else if (WIFSIGNALED (w
))
6495 synch_process_termsig
= WTERMSIG (w
);
6497 /* Tell wait_reading_process_output that it needs to wake up and
6499 if (input_available_clear_time
)
6500 *input_available_clear_time
= make_emacs_time (0, 0);
6506 /* On some systems, the SIGCHLD handler must return right away. If
6507 any more processes want to signal us, we will get another signal.
6508 Otherwise, loop around to use up all the processes that have
6509 something to tell us. */
6510 #if (defined WINDOWSNT \
6511 || (defined USG && !defined GNU_LINUX \
6512 && !(defined HPUX && defined WNOHANG)))
6513 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 0 };
6515 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 1 };
6519 handle_child_signal (int sig
)
6521 while (record_child_status_change () && CAN_HANDLE_MULTIPLE_CHILDREN
)
6526 deliver_child_signal (int sig
)
6528 handle_on_main_thread (sig
, handle_child_signal
);
6531 #endif /* SIGCHLD */
6535 exec_sentinel_unwind (Lisp_Object data
)
6537 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6542 exec_sentinel_error_handler (Lisp_Object error_val
)
6544 cmd_error_internal (error_val
, "error in process sentinel: ");
6546 update_echo_area ();
6547 Fsleep_for (make_number (2), Qnil
);
6552 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6554 Lisp_Object sentinel
, odeactivate
;
6555 struct Lisp_Process
*p
= XPROCESS (proc
);
6556 ptrdiff_t count
= SPECPDL_INDEX ();
6557 bool outer_running_asynch_code
= running_asynch_code
;
6558 int waiting
= waiting_for_user_input_p
;
6560 if (inhibit_sentinels
)
6563 /* No need to gcpro these, because all we do with them later
6564 is test them for EQness, and none of them should be a string. */
6565 odeactivate
= Vdeactivate_mark
;
6567 Lisp_Object obuffer
, okeymap
;
6568 XSETBUFFER (obuffer
, current_buffer
);
6569 okeymap
= BVAR (current_buffer
, keymap
);
6572 /* There's no good reason to let sentinels change the current
6573 buffer, and many callers of accept-process-output, sit-for, and
6574 friends don't expect current-buffer to be changed from under them. */
6575 record_unwind_current_buffer ();
6577 sentinel
= p
->sentinel
;
6578 if (NILP (sentinel
))
6581 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6582 assure that it gets restored no matter how the sentinel exits. */
6583 pset_sentinel (p
, Qnil
);
6584 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6585 /* Inhibit quit so that random quits don't screw up a running filter. */
6586 specbind (Qinhibit_quit
, Qt
);
6587 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6589 /* In case we get recursively called,
6590 and we already saved the match data nonrecursively,
6591 save the same match data in safely recursive fashion. */
6592 if (outer_running_asynch_code
)
6595 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6596 restore_search_regs ();
6597 record_unwind_save_match_data ();
6598 Fset_match_data (tem
, Qt
);
6601 /* For speed, if a search happens within this code,
6602 save the match data in a special nonrecursive fashion. */
6603 running_asynch_code
= 1;
6605 internal_condition_case_1 (read_process_output_call
,
6607 Fcons (proc
, Fcons (reason
, Qnil
))),
6608 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6609 exec_sentinel_error_handler
);
6611 /* If we saved the match data nonrecursively, restore it now. */
6612 restore_search_regs ();
6613 running_asynch_code
= outer_running_asynch_code
;
6615 Vdeactivate_mark
= odeactivate
;
6617 /* Restore waiting_for_user_input_p as it was
6618 when we were called, in case the filter clobbered it. */
6619 waiting_for_user_input_p
= waiting
;
6622 if (! EQ (Fcurrent_buffer (), obuffer
)
6623 || ! EQ (current_buffer
->keymap
, okeymap
))
6625 /* But do it only if the caller is actually going to read events.
6626 Otherwise there's no need to make him wake up, and it could
6627 cause trouble (for example it would make sit_for return). */
6628 if (waiting_for_user_input_p
== -1)
6629 record_asynch_buffer_change ();
6631 unbind_to (count
, Qnil
);
6634 /* Report all recent events of a change in process status
6635 (either run the sentinel or output a message).
6636 This is usually done while Emacs is waiting for keyboard input
6637 but can be done at other times. */
6640 status_notify (struct Lisp_Process
*deleting_process
)
6642 register Lisp_Object proc
, buffer
;
6643 Lisp_Object tail
, msg
;
6644 struct gcpro gcpro1
, gcpro2
;
6648 /* We need to gcpro tail; if read_process_output calls a filter
6649 which deletes a process and removes the cons to which tail points
6650 from Vprocess_alist, and then causes a GC, tail is an unprotected
6654 /* Set this now, so that if new processes are created by sentinels
6655 that we run, we get called again to handle their status changes. */
6656 update_tick
= process_tick
;
6658 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6661 register struct Lisp_Process
*p
;
6663 proc
= Fcdr (XCAR (tail
));
6664 p
= XPROCESS (proc
);
6666 if (p
->tick
!= p
->update_tick
)
6668 p
->update_tick
= p
->tick
;
6670 /* If process is still active, read any output that remains. */
6671 while (! EQ (p
->filter
, Qt
)
6672 && ! EQ (p
->status
, Qconnect
)
6673 && ! EQ (p
->status
, Qlisten
)
6674 /* Network or serial process not stopped: */
6675 && ! EQ (p
->command
, Qt
)
6677 && p
!= deleting_process
6678 && read_process_output (proc
, p
->infd
) > 0);
6682 /* Get the text to use for the message. */
6683 if (p
->raw_status_new
)
6685 msg
= status_message (p
);
6687 /* If process is terminated, deactivate it or delete it. */
6689 if (CONSP (p
->status
))
6690 symbol
= XCAR (p
->status
);
6692 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6693 || EQ (symbol
, Qclosed
))
6695 if (delete_exited_processes
)
6696 remove_process (proc
);
6698 deactivate_process (proc
);
6701 /* The actions above may have further incremented p->tick.
6702 So set p->update_tick again
6703 so that an error in the sentinel will not cause
6704 this code to be run again. */
6705 p
->update_tick
= p
->tick
;
6706 /* Now output the message suitably. */
6707 if (!NILP (p
->sentinel
))
6708 exec_sentinel (proc
, msg
);
6709 /* Don't bother with a message in the buffer
6710 when a process becomes runnable. */
6711 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6714 struct buffer
*old
= current_buffer
;
6715 ptrdiff_t opoint
, opoint_byte
;
6716 ptrdiff_t before
, before_byte
;
6718 /* Avoid error if buffer is deleted
6719 (probably that's why the process is dead, too) */
6720 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6722 Fset_buffer (buffer
);
6725 opoint_byte
= PT_BYTE
;
6726 /* Insert new output into buffer
6727 at the current end-of-output marker,
6728 thus preserving logical ordering of input and output. */
6729 if (XMARKER (p
->mark
)->buffer
)
6730 Fgoto_char (p
->mark
);
6732 SET_PT_BOTH (ZV
, ZV_BYTE
);
6735 before_byte
= PT_BYTE
;
6737 tem
= BVAR (current_buffer
, read_only
);
6738 bset_read_only (current_buffer
, Qnil
);
6739 insert_string ("\nProcess ");
6740 { /* FIXME: temporary kludge */
6741 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6742 insert_string (" ");
6744 bset_read_only (current_buffer
, tem
);
6745 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6747 if (opoint
>= before
)
6748 SET_PT_BOTH (opoint
+ (PT
- before
),
6749 opoint_byte
+ (PT_BYTE
- before_byte
));
6751 SET_PT_BOTH (opoint
, opoint_byte
);
6753 set_buffer_internal (old
);
6758 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6763 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6764 Sset_process_coding_system
, 1, 3, 0,
6765 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6766 DECODING will be used to decode subprocess output and ENCODING to
6767 encode subprocess input. */)
6768 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6770 register struct Lisp_Process
*p
;
6772 CHECK_PROCESS (process
);
6773 p
= XPROCESS (process
);
6775 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6777 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6778 Fcheck_coding_system (decoding
);
6779 Fcheck_coding_system (encoding
);
6780 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6781 pset_decode_coding_system (p
, decoding
);
6782 pset_encode_coding_system (p
, encoding
);
6783 setup_process_coding_systems (process
);
6788 DEFUN ("process-coding-system",
6789 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6790 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6791 (register Lisp_Object process
)
6793 CHECK_PROCESS (process
);
6794 return Fcons (XPROCESS (process
)->decode_coding_system
,
6795 XPROCESS (process
)->encode_coding_system
);
6798 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6799 Sset_process_filter_multibyte
, 2, 2, 0,
6800 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6801 If FLAG is non-nil, the filter is given multibyte strings.
6802 If FLAG is nil, the filter is given unibyte strings. In this case,
6803 all character code conversion except for end-of-line conversion is
6805 (Lisp_Object process
, Lisp_Object flag
)
6807 register struct Lisp_Process
*p
;
6809 CHECK_PROCESS (process
);
6810 p
= XPROCESS (process
);
6812 pset_decode_coding_system
6813 (p
, raw_text_coding_system (p
->decode_coding_system
));
6814 setup_process_coding_systems (process
);
6819 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6820 Sprocess_filter_multibyte_p
, 1, 1, 0,
6821 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6822 (Lisp_Object process
)
6824 register struct Lisp_Process
*p
;
6825 struct coding_system
*coding
;
6827 CHECK_PROCESS (process
);
6828 p
= XPROCESS (process
);
6829 coding
= proc_decode_coding_system
[p
->infd
];
6830 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6839 add_gpm_wait_descriptor (int desc
)
6841 add_keyboard_wait_descriptor (desc
);
6845 delete_gpm_wait_descriptor (int desc
)
6847 delete_keyboard_wait_descriptor (desc
);
6852 # ifdef USABLE_SIGIO
6854 /* Return nonzero if *MASK has a bit set
6855 that corresponds to one of the keyboard input descriptors. */
6858 keyboard_bit_set (fd_set
*mask
)
6862 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6863 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6864 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6871 #else /* not subprocesses */
6873 /* Defined on msdos.c. */
6874 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6875 EMACS_TIME
*, void *);
6877 /* Implementation of wait_reading_process_output, assuming that there
6878 are no subprocesses. Used only by the MS-DOS build.
6880 Wait for timeout to elapse and/or keyboard input to be available.
6884 If negative, gobble data immediately available but don't wait for any.
6887 an additional duration to wait, measured in nanoseconds
6888 If TIME_LIMIT is zero, then:
6889 If NSECS == 0, there is no limit.
6890 If NSECS > 0, the timeout consists of NSECS only.
6891 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6894 0 to ignore keyboard input, or
6895 1 to return when input is available, or
6896 -1 means caller will actually read the input, so don't throw to
6899 see full version for other parameters. We know that wait_proc will
6900 always be NULL, since `subprocesses' isn't defined.
6902 DO_DISPLAY != 0 means redisplay should be done to show subprocess
6903 output that arrives.
6905 Return true if we received input from any process. */
6908 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6910 Lisp_Object wait_for_cell
,
6911 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6914 EMACS_TIME end_time
, timeout
;
6921 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6922 time_limit
= TYPE_MAXIMUM (time_t);
6924 /* What does time_limit really mean? */
6925 if (time_limit
|| 0 < nsecs
)
6927 timeout
= make_emacs_time (time_limit
, nsecs
);
6928 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6931 /* Turn off periodic alarms (in case they are in use)
6932 and then turn off any other atimers,
6933 because the select emulator uses alarms. */
6935 turn_on_atimers (0);
6939 int timeout_reduced_for_timers
= 0;
6940 SELECT_TYPE waitchannels
;
6943 /* If calling from keyboard input, do not quit
6944 since we want to return C-g as an input character.
6945 Otherwise, do pending quit if requested. */
6949 /* Exit now if the cell we're waiting for became non-nil. */
6950 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6953 /* Compute time from now till when time limit is up */
6954 /* Exit if already run out */
6957 /* A negative timeout means
6958 gobble output available now
6959 but don't wait at all. */
6961 timeout
= make_emacs_time (0, 0);
6963 else if (time_limit
|| 0 < nsecs
)
6965 EMACS_TIME now
= current_emacs_time ();
6966 if (EMACS_TIME_LE (end_time
, now
))
6968 timeout
= sub_emacs_time (end_time
, now
);
6972 timeout
= make_emacs_time (100000, 0);
6975 /* If our caller will not immediately handle keyboard events,
6976 run timer events directly.
6977 (Callers that will immediately read keyboard events
6978 call timer_delay on their own.) */
6979 if (NILP (wait_for_cell
))
6981 EMACS_TIME timer_delay
;
6985 int old_timers_run
= timers_run
;
6986 timer_delay
= timer_check ();
6987 if (timers_run
!= old_timers_run
&& do_display
)
6988 /* We must retry, since a timer may have requeued itself
6989 and that could alter the time delay. */
6990 redisplay_preserve_echo_area (14);
6994 while (!detect_input_pending ());
6996 /* If there is unread keyboard input, also return. */
6998 && requeued_events_pending_p ())
7001 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
7003 if (EMACS_TIME_LT (timer_delay
, timeout
))
7005 timeout
= timer_delay
;
7006 timeout_reduced_for_timers
= 1;
7011 /* Cause C-g and alarm signals to take immediate action,
7012 and cause input available signals to zero out timeout. */
7014 set_waiting_for_input (&timeout
);
7016 /* If a frame has been newly mapped and needs updating,
7017 reprocess its display stuff. */
7018 if (frame_garbaged
&& do_display
)
7020 clear_waiting_for_input ();
7021 redisplay_preserve_echo_area (15);
7023 set_waiting_for_input (&timeout
);
7026 /* Wait till there is something to do. */
7027 FD_ZERO (&waitchannels
);
7028 if (read_kbd
&& detect_input_pending ())
7032 if (read_kbd
|| !NILP (wait_for_cell
))
7033 FD_SET (0, &waitchannels
);
7034 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
7039 /* Make C-g and alarm signals set flags again */
7040 clear_waiting_for_input ();
7042 /* If we woke up due to SIGWINCH, actually change size now. */
7043 do_pending_window_change (0);
7045 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
7046 /* We waited the full specified time, so return now. */
7051 /* If the system call was interrupted, then go around the
7053 if (xerrno
== EINTR
)
7054 FD_ZERO (&waitchannels
);
7056 error ("select error: %s", emacs_strerror (xerrno
));
7059 /* Check for keyboard input */
7062 && detect_input_pending_run_timers (do_display
))
7064 swallow_events (do_display
);
7065 if (detect_input_pending_run_timers (do_display
))
7069 /* If there is unread keyboard input, also return. */
7071 && requeued_events_pending_p ())
7074 /* If wait_for_cell. check for keyboard input
7075 but don't run any timers.
7076 ??? (It seems wrong to me to check for keyboard
7077 input at all when wait_for_cell, but the code
7078 has been this way since July 1994.
7079 Try changing this after version 19.31.) */
7080 if (! NILP (wait_for_cell
)
7081 && detect_input_pending ())
7083 swallow_events (do_display
);
7084 if (detect_input_pending ())
7088 /* Exit now if the cell we're waiting for became non-nil. */
7089 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7098 #endif /* not subprocesses */
7100 /* The following functions are needed even if async subprocesses are
7101 not supported. Some of them are no-op stubs in that case. */
7103 /* Add DESC to the set of keyboard input descriptors. */
7106 add_keyboard_wait_descriptor (int desc
)
7108 #ifdef subprocesses /* actually means "not MSDOS" */
7109 FD_SET (desc
, &input_wait_mask
);
7110 FD_SET (desc
, &non_process_wait_mask
);
7111 if (desc
> max_input_desc
)
7112 max_input_desc
= desc
;
7116 /* From now on, do not expect DESC to give keyboard input. */
7119 delete_keyboard_wait_descriptor (int desc
)
7123 int lim
= max_input_desc
;
7125 FD_CLR (desc
, &input_wait_mask
);
7126 FD_CLR (desc
, &non_process_wait_mask
);
7128 if (desc
== max_input_desc
)
7129 for (fd
= 0; fd
< lim
; fd
++)
7130 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7131 max_input_desc
= fd
;
7135 /* Setup coding systems of PROCESS. */
7138 setup_process_coding_systems (Lisp_Object process
)
7141 struct Lisp_Process
*p
= XPROCESS (process
);
7143 int outch
= p
->outfd
;
7144 Lisp_Object coding_system
;
7146 if (inch
< 0 || outch
< 0)
7149 if (!proc_decode_coding_system
[inch
])
7150 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7151 coding_system
= p
->decode_coding_system
;
7152 if (! NILP (p
->filter
))
7154 else if (BUFFERP (p
->buffer
))
7156 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7157 coding_system
= raw_text_coding_system (coding_system
);
7159 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7161 if (!proc_encode_coding_system
[outch
])
7162 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7163 setup_coding_system (p
->encode_coding_system
,
7164 proc_encode_coding_system
[outch
]);
7168 /* Close all descriptors currently in use for communication
7169 with subprocess. This is used in a newly-forked subprocess
7170 to get rid of irrelevant descriptors. */
7173 close_process_descs (void)
7177 for (i
= 0; i
< MAXDESC
; i
++)
7179 Lisp_Object process
;
7180 process
= chan_process
[i
];
7181 if (!NILP (process
))
7183 int in
= XPROCESS (process
)->infd
;
7184 int out
= XPROCESS (process
)->outfd
;
7187 if (out
>= 0 && in
!= out
)
7194 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7195 doc
: /* Return the (or a) process associated with BUFFER.
7196 BUFFER may be a buffer or the name of one. */)
7197 (register Lisp_Object buffer
)
7200 register Lisp_Object buf
, tail
, proc
;
7202 if (NILP (buffer
)) return Qnil
;
7203 buf
= Fget_buffer (buffer
);
7204 if (NILP (buf
)) return Qnil
;
7206 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7208 proc
= Fcdr (XCAR (tail
));
7209 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7212 #endif /* subprocesses */
7216 DEFUN ("process-inherit-coding-system-flag",
7217 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7219 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7220 If this flag is t, `buffer-file-coding-system' of the buffer
7221 associated with PROCESS will inherit the coding system used to decode
7222 the process output. */)
7223 (register Lisp_Object process
)
7226 CHECK_PROCESS (process
);
7227 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7229 /* Ignore the argument and return the value of
7230 inherit-process-coding-system. */
7231 return inherit_process_coding_system
? Qt
: Qnil
;
7235 /* Kill all processes associated with `buffer'.
7236 If `buffer' is nil, kill all processes */
7239 kill_buffer_processes (Lisp_Object buffer
)
7242 Lisp_Object tail
, proc
;
7244 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7246 proc
= XCDR (XCAR (tail
));
7248 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7250 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7251 Fdelete_process (proc
);
7252 else if (XPROCESS (proc
)->infd
>= 0)
7253 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7256 #else /* subprocesses */
7257 /* Since we have no subprocesses, this does nothing. */
7258 #endif /* subprocesses */
7261 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7262 Swaiting_for_user_input_p
, 0, 0, 0,
7263 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7264 This is intended for use by asynchronous process output filters and sentinels. */)
7268 return (waiting_for_user_input_p
? Qt
: Qnil
);
7274 /* Stop reading input from keyboard sources. */
7277 hold_keyboard_input (void)
7282 /* Resume reading input from keyboard sources. */
7285 unhold_keyboard_input (void)
7290 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7293 kbd_on_hold_p (void)
7295 return kbd_is_on_hold
;
7299 /* Enumeration of and access to system processes a-la ps(1). */
7301 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7303 doc
: /* Return a list of numerical process IDs of all running processes.
7304 If this functionality is unsupported, return nil.
7306 See `process-attributes' for getting attributes of a process given its ID. */)
7309 return list_system_processes ();
7312 DEFUN ("process-attributes", Fprocess_attributes
,
7313 Sprocess_attributes
, 1, 1, 0,
7314 doc
: /* Return attributes of the process given by its PID, a number.
7316 Value is an alist where each element is a cons cell of the form
7320 If this functionality is unsupported, the value is nil.
7322 See `list-system-processes' for getting a list of all process IDs.
7324 The KEYs of the attributes that this function may return are listed
7325 below, together with the type of the associated VALUE (in parentheses).
7326 Not all platforms support all of these attributes; unsupported
7327 attributes will not appear in the returned alist.
7328 Unless explicitly indicated otherwise, numbers can have either
7329 integer or floating point values.
7331 euid -- Effective user User ID of the process (number)
7332 user -- User name corresponding to euid (string)
7333 egid -- Effective user Group ID of the process (number)
7334 group -- Group name corresponding to egid (string)
7335 comm -- Command name (executable name only) (string)
7336 state -- Process state code, such as "S", "R", or "T" (string)
7337 ppid -- Parent process ID (number)
7338 pgrp -- Process group ID (number)
7339 sess -- Session ID, i.e. process ID of session leader (number)
7340 ttname -- Controlling tty name (string)
7341 tpgid -- ID of foreground process group on the process's tty (number)
7342 minflt -- number of minor page faults (number)
7343 majflt -- number of major page faults (number)
7344 cminflt -- cumulative number of minor page faults (number)
7345 cmajflt -- cumulative number of major page faults (number)
7346 utime -- user time used by the process, in (current-time) format,
7347 which is a list of integers (HIGH LOW USEC PSEC)
7348 stime -- system time used by the process (current-time)
7349 time -- sum of utime and stime (current-time)
7350 cutime -- user time used by the process and its children (current-time)
7351 cstime -- system time used by the process and its children (current-time)
7352 ctime -- sum of cutime and cstime (current-time)
7353 pri -- priority of the process (number)
7354 nice -- nice value of the process (number)
7355 thcount -- process thread count (number)
7356 start -- time the process started (current-time)
7357 vsize -- virtual memory size of the process in KB's (number)
7358 rss -- resident set size of the process in KB's (number)
7359 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7360 pcpu -- percents of CPU time used by the process (floating-point number)
7361 pmem -- percents of total physical memory used by process's resident set
7362 (floating-point number)
7363 args -- command line which invoked the process (string). */)
7366 return system_process_attributes (pid
);
7370 /* This is not called "init_process" because that is the name of a
7371 Mach system call, so it would cause problems on Darwin systems. */
7373 init_process_emacs (void)
7378 inhibit_sentinels
= 0;
7382 if (! noninteractive
|| initialized
)
7385 struct sigaction action
;
7386 emacs_sigaction_init (&action
, deliver_child_signal
);
7387 sigaction (SIGCHLD
, &action
, 0);
7391 FD_ZERO (&input_wait_mask
);
7392 FD_ZERO (&non_keyboard_wait_mask
);
7393 FD_ZERO (&non_process_wait_mask
);
7394 FD_ZERO (&write_mask
);
7395 max_process_desc
= 0;
7396 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7398 #ifdef NON_BLOCKING_CONNECT
7399 FD_ZERO (&connect_wait_mask
);
7400 num_pending_connects
= 0;
7403 #ifdef ADAPTIVE_READ_BUFFERING
7404 process_output_delay_count
= 0;
7405 process_output_skip
= 0;
7408 /* Don't do this, it caused infinite select loops. The display
7409 method should call add_keyboard_wait_descriptor on stdin if it
7412 FD_SET (0, &input_wait_mask
);
7415 Vprocess_alist
= Qnil
;
7417 deleted_pid_list
= Qnil
;
7419 for (i
= 0; i
< MAXDESC
; i
++)
7421 chan_process
[i
] = Qnil
;
7422 proc_buffered_char
[i
] = -1;
7424 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7425 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7426 #ifdef DATAGRAM_SOCKETS
7427 memset (datagram_address
, 0, sizeof datagram_address
);
7431 Lisp_Object subfeatures
= Qnil
;
7432 const struct socket_options
*sopt
;
7434 #define ADD_SUBFEATURE(key, val) \
7435 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7437 #ifdef NON_BLOCKING_CONNECT
7438 ADD_SUBFEATURE (QCnowait
, Qt
);
7440 #ifdef DATAGRAM_SOCKETS
7441 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7443 #ifdef HAVE_SEQPACKET
7444 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7446 #ifdef HAVE_LOCAL_SOCKETS
7447 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7449 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7451 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7453 #ifdef HAVE_GETSOCKNAME
7454 ADD_SUBFEATURE (QCservice
, Qt
);
7456 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7457 ADD_SUBFEATURE (QCserver
, Qt
);
7460 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7461 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7463 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7466 #if defined (DARWIN_OS)
7467 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7468 processes. As such, we only change the default value. */
7471 char const *release
= (STRINGP (Voperating_system_release
)
7472 ? SSDATA (Voperating_system_release
)
7474 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7475 Vprocess_connection_type
= Qnil
;
7479 #endif /* subprocesses */
7484 syms_of_process (void)
7488 DEFSYM (Qprocessp
, "processp");
7489 DEFSYM (Qrun
, "run");
7490 DEFSYM (Qstop
, "stop");
7491 DEFSYM (Qsignal
, "signal");
7493 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7496 Qexit = intern_c_string ("exit");
7497 staticpro (&Qexit); */
7499 DEFSYM (Qopen
, "open");
7500 DEFSYM (Qclosed
, "closed");
7501 DEFSYM (Qconnect
, "connect");
7502 DEFSYM (Qfailed
, "failed");
7503 DEFSYM (Qlisten
, "listen");
7504 DEFSYM (Qlocal
, "local");
7505 DEFSYM (Qipv4
, "ipv4");
7507 DEFSYM (Qipv6
, "ipv6");
7509 DEFSYM (Qdatagram
, "datagram");
7510 DEFSYM (Qseqpacket
, "seqpacket");
7512 DEFSYM (QCport
, ":port");
7513 DEFSYM (QCspeed
, ":speed");
7514 DEFSYM (QCprocess
, ":process");
7516 DEFSYM (QCbytesize
, ":bytesize");
7517 DEFSYM (QCstopbits
, ":stopbits");
7518 DEFSYM (QCparity
, ":parity");
7519 DEFSYM (Qodd
, "odd");
7520 DEFSYM (Qeven
, "even");
7521 DEFSYM (QCflowcontrol
, ":flowcontrol");
7524 DEFSYM (QCsummary
, ":summary");
7526 DEFSYM (Qreal
, "real");
7527 DEFSYM (Qnetwork
, "network");
7528 DEFSYM (Qserial
, "serial");
7529 DEFSYM (QCbuffer
, ":buffer");
7530 DEFSYM (QChost
, ":host");
7531 DEFSYM (QCservice
, ":service");
7532 DEFSYM (QClocal
, ":local");
7533 DEFSYM (QCremote
, ":remote");
7534 DEFSYM (QCcoding
, ":coding");
7535 DEFSYM (QCserver
, ":server");
7536 DEFSYM (QCnowait
, ":nowait");
7537 DEFSYM (QCsentinel
, ":sentinel");
7538 DEFSYM (QClog
, ":log");
7539 DEFSYM (QCnoquery
, ":noquery");
7540 DEFSYM (QCstop
, ":stop");
7541 DEFSYM (QCoptions
, ":options");
7542 DEFSYM (QCplist
, ":plist");
7544 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7546 staticpro (&Vprocess_alist
);
7548 staticpro (&deleted_pid_list
);
7551 #endif /* subprocesses */
7553 DEFSYM (QCname
, ":name");
7554 DEFSYM (QCtype
, ":type");
7556 DEFSYM (Qeuid
, "euid");
7557 DEFSYM (Qegid
, "egid");
7558 DEFSYM (Quser
, "user");
7559 DEFSYM (Qgroup
, "group");
7560 DEFSYM (Qcomm
, "comm");
7561 DEFSYM (Qstate
, "state");
7562 DEFSYM (Qppid
, "ppid");
7563 DEFSYM (Qpgrp
, "pgrp");
7564 DEFSYM (Qsess
, "sess");
7565 DEFSYM (Qttname
, "ttname");
7566 DEFSYM (Qtpgid
, "tpgid");
7567 DEFSYM (Qminflt
, "minflt");
7568 DEFSYM (Qmajflt
, "majflt");
7569 DEFSYM (Qcminflt
, "cminflt");
7570 DEFSYM (Qcmajflt
, "cmajflt");
7571 DEFSYM (Qutime
, "utime");
7572 DEFSYM (Qstime
, "stime");
7573 DEFSYM (Qtime
, "time");
7574 DEFSYM (Qcutime
, "cutime");
7575 DEFSYM (Qcstime
, "cstime");
7576 DEFSYM (Qctime
, "ctime");
7577 DEFSYM (Qpri
, "pri");
7578 DEFSYM (Qnice
, "nice");
7579 DEFSYM (Qthcount
, "thcount");
7580 DEFSYM (Qstart
, "start");
7581 DEFSYM (Qvsize
, "vsize");
7582 DEFSYM (Qrss
, "rss");
7583 DEFSYM (Qetime
, "etime");
7584 DEFSYM (Qpcpu
, "pcpu");
7585 DEFSYM (Qpmem
, "pmem");
7586 DEFSYM (Qargs
, "args");
7588 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7589 doc
: /* Non-nil means delete processes immediately when they exit.
7590 A value of nil means don't delete them until `list-processes' is run. */);
7592 delete_exited_processes
= 1;
7595 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7596 doc
: /* Control type of device used to communicate with subprocesses.
7597 Values are nil to use a pipe, or t or `pty' to use a pty.
7598 The value has no effect if the system has no ptys or if all ptys are busy:
7599 then a pipe is used in any case.
7600 The value takes effect when `start-process' is called. */);
7601 Vprocess_connection_type
= Qt
;
7603 #ifdef ADAPTIVE_READ_BUFFERING
7604 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7605 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7606 On some systems, when Emacs reads the output from a subprocess, the output data
7607 is read in very small blocks, potentially resulting in very poor performance.
7608 This behavior can be remedied to some extent by setting this variable to a
7609 non-nil value, as it will automatically delay reading from such processes, to
7610 allow them to produce more output before Emacs tries to read it.
7611 If the value is t, the delay is reset after each write to the process; any other
7612 non-nil value means that the delay is not reset on write.
7613 The variable takes effect when `start-process' is called. */);
7614 Vprocess_adaptive_read_buffering
= Qt
;
7617 defsubr (&Sprocessp
);
7618 defsubr (&Sget_process
);
7619 defsubr (&Sdelete_process
);
7620 defsubr (&Sprocess_status
);
7621 defsubr (&Sprocess_exit_status
);
7622 defsubr (&Sprocess_id
);
7623 defsubr (&Sprocess_name
);
7624 defsubr (&Sprocess_tty_name
);
7625 defsubr (&Sprocess_command
);
7626 defsubr (&Sset_process_buffer
);
7627 defsubr (&Sprocess_buffer
);
7628 defsubr (&Sprocess_mark
);
7629 defsubr (&Sset_process_filter
);
7630 defsubr (&Sprocess_filter
);
7631 defsubr (&Sset_process_sentinel
);
7632 defsubr (&Sprocess_sentinel
);
7633 defsubr (&Sset_process_window_size
);
7634 defsubr (&Sset_process_inherit_coding_system_flag
);
7635 defsubr (&Sset_process_query_on_exit_flag
);
7636 defsubr (&Sprocess_query_on_exit_flag
);
7637 defsubr (&Sprocess_contact
);
7638 defsubr (&Sprocess_plist
);
7639 defsubr (&Sset_process_plist
);
7640 defsubr (&Sprocess_list
);
7641 defsubr (&Sstart_process
);
7642 defsubr (&Sserial_process_configure
);
7643 defsubr (&Smake_serial_process
);
7644 defsubr (&Sset_network_process_option
);
7645 defsubr (&Smake_network_process
);
7646 defsubr (&Sformat_network_address
);
7647 #if defined (HAVE_NET_IF_H)
7649 defsubr (&Snetwork_interface_list
);
7651 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7652 defsubr (&Snetwork_interface_info
);
7654 #endif /* defined (HAVE_NET_IF_H) */
7655 #ifdef DATAGRAM_SOCKETS
7656 defsubr (&Sprocess_datagram_address
);
7657 defsubr (&Sset_process_datagram_address
);
7659 defsubr (&Saccept_process_output
);
7660 defsubr (&Sprocess_send_region
);
7661 defsubr (&Sprocess_send_string
);
7662 defsubr (&Sinterrupt_process
);
7663 defsubr (&Skill_process
);
7664 defsubr (&Squit_process
);
7665 defsubr (&Sstop_process
);
7666 defsubr (&Scontinue_process
);
7667 defsubr (&Sprocess_running_child_p
);
7668 defsubr (&Sprocess_send_eof
);
7669 defsubr (&Ssignal_process
);
7670 defsubr (&Swaiting_for_user_input_p
);
7671 defsubr (&Sprocess_type
);
7672 defsubr (&Sset_process_coding_system
);
7673 defsubr (&Sprocess_coding_system
);
7674 defsubr (&Sset_process_filter_multibyte
);
7675 defsubr (&Sprocess_filter_multibyte_p
);
7677 #endif /* subprocesses */
7679 defsubr (&Sget_buffer_process
);
7680 defsubr (&Sprocess_inherit_coding_system_flag
);
7681 defsubr (&Slist_system_processes
);
7682 defsubr (&Sprocess_attributes
);