1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2011
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h> /* some typedefs are used in sys/file.h */
31 #ifdef HAVE_INTTYPES_H
38 /* Only MS-DOS does not define `subprocesses'. */
41 #include <sys/socket.h>
43 #include <netinet/in.h>
44 #include <arpa/inet.h>
46 /* Are local (unix) sockets supported? */
47 #if defined (HAVE_SYS_UN_H)
48 #if !defined (AF_LOCAL) && defined (AF_UNIX)
49 #define AF_LOCAL AF_UNIX
52 #define HAVE_LOCAL_SOCKETS
57 #include <sys/ioctl.h>
58 #if defined(HAVE_NET_IF_H)
60 #endif /* HAVE_NET_IF_H */
67 #include <netinet/in.h>
68 #include <arpa/nameser.h>
80 #endif /* subprocesses */
88 #include "character.h"
92 #include "termhooks.h"
96 #include "blockinput.h"
97 #include "dispextern.h"
98 #include "composite.h"
100 #include "sysselect.h"
101 #include "syssignal.h"
107 #if defined (USE_GTK) || defined (HAVE_GCONF)
108 #include "xgselect.h"
109 #endif /* defined (USE_GTK) || defined (HAVE_GCONF) */
114 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
115 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
116 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
117 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
118 Lisp_Object QCname
, QCtype
;
120 /* Non-zero if keyboard input is on hold, zero otherwise. */
122 static int kbd_is_on_hold
;
124 /* Nonzero means don't run process sentinels. This is used
126 int inhibit_sentinels
;
130 Lisp_Object Qprocessp
;
131 Lisp_Object Qrun
, Qstop
, Qsignal
;
132 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
133 Lisp_Object Qlocal
, Qipv4
, Qdatagram
, Qseqpacket
;
134 Lisp_Object Qreal
, Qnetwork
, Qserial
;
138 Lisp_Object QCport
, QCspeed
, QCprocess
;
139 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
140 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
141 Lisp_Object QCbuffer
, QChost
, QCservice
;
142 Lisp_Object QClocal
, QCremote
, QCcoding
;
143 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
144 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
145 Lisp_Object Qlast_nonmenu_event
;
146 /* QCfamily is declared and initialized in xfaces.c,
147 QCfilter in keyboard.c. */
148 extern Lisp_Object QCfamily
, QCfilter
;
150 /* Qexit is declared and initialized in eval.c. */
152 /* QCfamily is defined in xfaces.c. */
153 extern Lisp_Object QCfamily
;
154 /* QCfilter is defined in keyboard.c. */
155 extern Lisp_Object QCfilter
;
157 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
158 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
159 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
160 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
166 /* These next two vars are non-static since sysdep.c uses them in the
167 emulation of `select'. */
168 /* Number of events of change of status of a process. */
170 /* Number of events for which the user or sentinel has been notified. */
173 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
175 /* Only W32 has this, it really means that select can't take write mask. */
176 #ifdef BROKEN_NON_BLOCKING_CONNECT
177 #undef NON_BLOCKING_CONNECT
178 #define SELECT_CANT_DO_WRITE_MASK
180 #ifndef NON_BLOCKING_CONNECT
182 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
183 #if defined (O_NONBLOCK) || defined (O_NDELAY)
184 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
185 #define NON_BLOCKING_CONNECT
186 #endif /* EWOULDBLOCK || EINPROGRESS */
187 #endif /* O_NONBLOCK || O_NDELAY */
188 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
189 #endif /* HAVE_SELECT */
190 #endif /* NON_BLOCKING_CONNECT */
191 #endif /* BROKEN_NON_BLOCKING_CONNECT */
193 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
194 this system. We need to read full packets, so we need a
195 "non-destructive" select. So we require either native select,
196 or emulation of select using FIONREAD. */
198 #ifdef BROKEN_DATAGRAM_SOCKETS
199 #undef DATAGRAM_SOCKETS
201 #ifndef DATAGRAM_SOCKETS
202 #if defined (HAVE_SELECT) || defined (FIONREAD)
203 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
204 #define DATAGRAM_SOCKETS
205 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
206 #endif /* HAVE_SELECT || FIONREAD */
207 #endif /* DATAGRAM_SOCKETS */
208 #endif /* BROKEN_DATAGRAM_SOCKETS */
210 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
211 # define HAVE_SEQPACKET
214 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
215 #ifdef EMACS_HAS_USECS
216 #define ADAPTIVE_READ_BUFFERING
220 #ifdef ADAPTIVE_READ_BUFFERING
221 #define READ_OUTPUT_DELAY_INCREMENT 10000
222 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
223 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
225 /* Number of processes which have a non-zero read_output_delay,
226 and therefore might be delayed for adaptive read buffering. */
228 static int process_output_delay_count
;
230 /* Non-zero if any process has non-nil read_output_skip. */
232 static int process_output_skip
;
235 #define process_output_delay_count 0
238 static int keyboard_bit_set (SELECT_TYPE
*);
239 static void deactivate_process (Lisp_Object
);
240 static void status_notify (struct Lisp_Process
*);
241 static int read_process_output (Lisp_Object
, int);
242 static void create_pty (Lisp_Object
);
244 /* If we support a window system, turn on the code to poll periodically
245 to detect C-g. It isn't actually used when doing interrupt input. */
246 #ifdef HAVE_WINDOW_SYSTEM
247 #define POLL_FOR_INPUT
250 static Lisp_Object
get_process (register Lisp_Object name
);
251 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
253 /* Mask of bits indicating the descriptors that we wait for input on. */
255 static SELECT_TYPE input_wait_mask
;
257 /* Mask that excludes keyboard input descriptor(s). */
259 static SELECT_TYPE non_keyboard_wait_mask
;
261 /* Mask that excludes process input descriptor(s). */
263 static SELECT_TYPE non_process_wait_mask
;
265 /* Mask for selecting for write. */
267 static SELECT_TYPE write_mask
;
269 #ifdef NON_BLOCKING_CONNECT
270 /* Mask of bits indicating the descriptors that we wait for connect to
271 complete on. Once they complete, they are removed from this mask
272 and added to the input_wait_mask and non_keyboard_wait_mask. */
274 static SELECT_TYPE connect_wait_mask
;
276 /* Number of bits set in connect_wait_mask. */
277 static int num_pending_connects
;
278 #endif /* NON_BLOCKING_CONNECT */
280 /* The largest descriptor currently in use for a process object. */
281 static int max_process_desc
;
283 /* The largest descriptor currently in use for input. */
284 static int max_input_desc
;
286 /* Indexed by descriptor, gives the process (if any) for that descriptor */
287 Lisp_Object chan_process
[MAXDESC
];
289 /* Alist of elements (NAME . PROCESS) */
290 Lisp_Object Vprocess_alist
;
292 /* Buffered-ahead input char from process, indexed by channel.
293 -1 means empty (no char is buffered).
294 Used on sys V where the only way to tell if there is any
295 output from the process is to read at least one char.
296 Always -1 on systems that support FIONREAD. */
298 /* Don't make static; need to access externally. */
299 int proc_buffered_char
[MAXDESC
];
301 /* Table of `struct coding-system' for each process. */
302 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
303 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
305 #ifdef DATAGRAM_SOCKETS
306 /* Table of `partner address' for datagram sockets. */
307 struct sockaddr_and_len
{
310 } datagram_address
[MAXDESC
];
311 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
312 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
314 #define DATAGRAM_CHAN_P(chan) (0)
315 #define DATAGRAM_CONN_P(proc) (0)
318 /* Maximum number of bytes to send to a pty without an eof. */
319 static int pty_max_bytes
;
323 struct fd_callback_data
329 int condition
; /* mask of the defines above. */
330 } fd_callback_info
[MAXDESC
];
333 /* Add a file descriptor FD to be monitored for when read is possible.
334 When read is possible, call FUNC with argument DATA. */
337 add_read_fd (int fd
, fd_callback func
, void *data
)
339 xassert (fd
< MAXDESC
);
340 add_keyboard_wait_descriptor (fd
);
342 fd_callback_info
[fd
].func
= func
;
343 fd_callback_info
[fd
].data
= data
;
344 fd_callback_info
[fd
].condition
|= FOR_READ
;
347 /* Stop monitoring file descriptor FD for when read is possible. */
350 delete_read_fd (int fd
)
352 xassert (fd
< MAXDESC
);
353 delete_keyboard_wait_descriptor (fd
);
355 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
356 if (fd_callback_info
[fd
].condition
== 0)
358 fd_callback_info
[fd
].func
= 0;
359 fd_callback_info
[fd
].data
= 0;
363 /* Add a file descriptor FD to be monitored for when write is possible.
364 When write is possible, call FUNC with argument DATA. */
367 add_write_fd (int fd
, fd_callback func
, void *data
)
369 xassert (fd
< MAXDESC
);
370 FD_SET (fd
, &write_mask
);
371 if (fd
> max_input_desc
)
374 fd_callback_info
[fd
].func
= func
;
375 fd_callback_info
[fd
].data
= data
;
376 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
379 /* Stop monitoring file descriptor FD for when write is possible. */
382 delete_write_fd (int fd
)
384 int lim
= max_input_desc
;
386 xassert (fd
< MAXDESC
);
387 FD_CLR (fd
, &write_mask
);
388 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
389 if (fd_callback_info
[fd
].condition
== 0)
391 fd_callback_info
[fd
].func
= 0;
392 fd_callback_info
[fd
].data
= 0;
394 if (fd
== max_input_desc
)
395 for (fd
= lim
; fd
>= 0; fd
--)
396 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
406 /* Compute the Lisp form of the process status, p->status, from
407 the numeric status that was returned by `wait'. */
409 static Lisp_Object
status_convert (int);
412 update_status (struct Lisp_Process
*p
)
414 eassert (p
->raw_status_new
);
415 p
->status
= status_convert (p
->raw_status
);
416 p
->raw_status_new
= 0;
419 /* Convert a process status word in Unix format to
420 the list that we use internally. */
423 status_convert (int w
)
426 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
427 else if (WIFEXITED (w
))
428 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
429 WCOREDUMP (w
) ? Qt
: Qnil
));
430 else if (WIFSIGNALED (w
))
431 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
432 WCOREDUMP (w
) ? Qt
: Qnil
));
437 /* Given a status-list, extract the three pieces of information
438 and store them individually through the three pointers. */
441 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
455 *code
= XFASTINT (XCAR (tem
));
457 *coredump
= !NILP (tem
);
461 /* Return a string describing a process status list. */
464 status_message (struct Lisp_Process
*p
)
466 Lisp_Object status
= p
->status
;
469 Lisp_Object string
, string2
;
471 decode_status (status
, &symbol
, &code
, &coredump
);
473 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
476 synchronize_system_messages_locale ();
477 signame
= strsignal (code
);
479 string
= build_string ("unknown");
484 string
= make_unibyte_string (signame
, strlen (signame
));
485 if (! NILP (Vlocale_coding_system
))
486 string
= (code_convert_string_norecord
487 (string
, Vlocale_coding_system
, 0));
488 c1
= STRING_CHAR (SDATA (string
));
491 Faset (string
, make_number (0), make_number (c2
));
493 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
494 return concat2 (string
, string2
);
496 else if (EQ (symbol
, Qexit
))
499 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
501 return build_string ("finished\n");
502 string
= Fnumber_to_string (make_number (code
));
503 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
504 return concat3 (build_string ("exited abnormally with code "),
507 else if (EQ (symbol
, Qfailed
))
509 string
= Fnumber_to_string (make_number (code
));
510 string2
= build_string ("\n");
511 return concat3 (build_string ("failed with code "),
515 return Fcopy_sequence (Fsymbol_name (symbol
));
520 /* The file name of the pty opened by allocate_pty. */
521 static char pty_name
[24];
523 /* Open an available pty, returning a file descriptor.
524 Return -1 on failure.
525 The file name of the terminal corresponding to the pty
526 is left in the variable pty_name. */
537 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
538 for (i
= 0; i
< 16; i
++)
541 #ifdef PTY_NAME_SPRINTF
544 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
545 #endif /* no PTY_NAME_SPRINTF */
549 #else /* no PTY_OPEN */
551 { /* Some systems name their pseudoterminals so that there are gaps in
552 the usual sequence - for example, on HP9000/S700 systems, there
553 are no pseudoterminals with names ending in 'f'. So we wait for
554 three failures in a row before deciding that we've reached the
556 int failed_count
= 0;
559 if (stat (pty_name
, &stb
) < 0)
562 if (failed_count
>= 3)
569 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
571 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
574 #endif /* no PTY_OPEN */
578 /* check to make certain that both sides are available
579 this avoids a nasty yet stupid bug in rlogins */
580 #ifdef PTY_TTY_NAME_SPRINTF
583 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
584 #endif /* no PTY_TTY_NAME_SPRINTF */
585 if (access (pty_name
, 6) != 0)
600 #endif /* HAVE_PTYS */
603 make_process (Lisp_Object name
)
605 register Lisp_Object val
, tem
, name1
;
606 register struct Lisp_Process
*p
;
610 p
= allocate_process ();
618 p
->raw_status_new
= 0;
620 p
->mark
= Fmake_marker ();
621 p
->kill_without_query
= 0;
623 #ifdef ADAPTIVE_READ_BUFFERING
624 p
->adaptive_read_buffering
= 0;
625 p
->read_output_delay
= 0;
626 p
->read_output_skip
= 0;
630 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
631 p
->gnutls_log_level
= 0;
635 /* If name is already in use, modify it until it is unused. */
640 tem
= Fget_process (name1
);
641 if (NILP (tem
)) break;
642 sprintf (suffix
, "<%d>", i
);
643 name1
= concat2 (name
, build_string (suffix
));
647 XSETPROCESS (val
, p
);
648 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
653 remove_process (register Lisp_Object proc
)
655 register Lisp_Object pair
;
657 pair
= Frassq (proc
, Vprocess_alist
);
658 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
660 deactivate_process (proc
);
664 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
665 doc
: /* Return t if OBJECT is a process. */)
668 return PROCESSP (object
) ? Qt
: Qnil
;
671 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
672 doc
: /* Return the process named NAME, or nil if there is none. */)
673 (register Lisp_Object name
)
678 return Fcdr (Fassoc (name
, Vprocess_alist
));
681 /* This is how commands for the user decode process arguments. It
682 accepts a process, a process name, a buffer, a buffer name, or nil.
683 Buffers denote the first process in the buffer, and nil denotes the
687 get_process (register Lisp_Object name
)
689 register Lisp_Object proc
, obj
;
692 obj
= Fget_process (name
);
694 obj
= Fget_buffer (name
);
696 error ("Process %s does not exist", SDATA (name
));
698 else if (NILP (name
))
699 obj
= Fcurrent_buffer ();
703 /* Now obj should be either a buffer object or a process object.
707 proc
= Fget_buffer_process (obj
);
709 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
721 /* Fdelete_process promises to immediately forget about the process, but in
722 reality, Emacs needs to remember those processes until they have been
723 treated by sigchld_handler; otherwise this handler would consider the
724 process as being synchronous and say that the synchronous process is
726 static Lisp_Object deleted_pid_list
;
729 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
730 doc
: /* Delete PROCESS: kill it and forget about it immediately.
731 PROCESS may be a process, a buffer, the name of a process or buffer, or
732 nil, indicating the current buffer's process. */)
733 (register Lisp_Object process
)
735 register struct Lisp_Process
*p
;
737 process
= get_process (process
);
738 p
= XPROCESS (process
);
740 p
->raw_status_new
= 0;
741 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
743 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
744 p
->tick
= ++process_tick
;
746 redisplay_preserve_echo_area (13);
748 else if (p
->infd
>= 0)
752 /* Assignment to EMACS_INT stops GCC whining about limited range
754 EMACS_INT pid
= p
->pid
;
756 /* No problem storing the pid here, as it is still in Vprocess_alist. */
757 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
758 /* GC treated elements set to nil. */
759 Fdelq (Qnil
, deleted_pid_list
));
760 /* If the process has already signaled, remove it from the list. */
761 if (p
->raw_status_new
)
764 if (CONSP (p
->status
))
765 symbol
= XCAR (p
->status
);
766 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
768 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
772 Fkill_process (process
, Qnil
);
773 /* Do this now, since remove_process will make sigchld_handler do nothing. */
775 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
776 p
->tick
= ++process_tick
;
778 redisplay_preserve_echo_area (13);
781 remove_process (process
);
785 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
786 doc
: /* Return the status of PROCESS.
787 The returned value is one of the following symbols:
788 run -- for a process that is running.
789 stop -- for a process stopped but continuable.
790 exit -- for a process that has exited.
791 signal -- for a process that has got a fatal signal.
792 open -- for a network stream connection that is open.
793 listen -- for a network stream server that is listening.
794 closed -- for a network stream connection that is closed.
795 connect -- when waiting for a non-blocking connection to complete.
796 failed -- when a non-blocking connection has failed.
797 nil -- if arg is a process name and no such process exists.
798 PROCESS may be a process, a buffer, the name of a process, or
799 nil, indicating the current buffer's process. */)
800 (register Lisp_Object process
)
802 register struct Lisp_Process
*p
;
803 register Lisp_Object status
;
805 if (STRINGP (process
))
806 process
= Fget_process (process
);
808 process
= get_process (process
);
813 p
= XPROCESS (process
);
814 if (p
->raw_status_new
)
818 status
= XCAR (status
);
819 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
821 if (EQ (status
, Qexit
))
823 else if (EQ (p
->command
, Qt
))
825 else if (EQ (status
, Qrun
))
831 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
833 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
834 If PROCESS has not yet exited or died, return 0. */)
835 (register Lisp_Object process
)
837 CHECK_PROCESS (process
);
838 if (XPROCESS (process
)->raw_status_new
)
839 update_status (XPROCESS (process
));
840 if (CONSP (XPROCESS (process
)->status
))
841 return XCAR (XCDR (XPROCESS (process
)->status
));
842 return make_number (0);
845 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
846 doc
: /* Return the process id of PROCESS.
847 This is the pid of the external process which PROCESS uses or talks to.
848 For a network connection, this value is nil. */)
849 (register Lisp_Object process
)
851 /* Assignment to EMACS_INT stops GCC whining about limited range of
855 CHECK_PROCESS (process
);
856 pid
= XPROCESS (process
)->pid
;
857 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
860 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
861 doc
: /* Return the name of PROCESS, as a string.
862 This is the name of the program invoked in PROCESS,
863 possibly modified to make it unique among process names. */)
864 (register Lisp_Object process
)
866 CHECK_PROCESS (process
);
867 return XPROCESS (process
)->name
;
870 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
871 doc
: /* Return the command that was executed to start PROCESS.
872 This is a list of strings, the first string being the program executed
873 and the rest of the strings being the arguments given to it.
874 For a network or serial process, this is nil (process is running) or t
875 \(process is stopped). */)
876 (register Lisp_Object process
)
878 CHECK_PROCESS (process
);
879 return XPROCESS (process
)->command
;
882 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
883 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
884 This is the terminal that the process itself reads and writes on,
885 not the name of the pty that Emacs uses to talk with that terminal. */)
886 (register Lisp_Object process
)
888 CHECK_PROCESS (process
);
889 return XPROCESS (process
)->tty_name
;
892 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
894 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
895 (register Lisp_Object process
, Lisp_Object buffer
)
897 struct Lisp_Process
*p
;
899 CHECK_PROCESS (process
);
901 CHECK_BUFFER (buffer
);
902 p
= XPROCESS (process
);
904 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
905 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
906 setup_process_coding_systems (process
);
910 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
912 doc
: /* Return the buffer PROCESS is associated with.
913 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
914 (register Lisp_Object process
)
916 CHECK_PROCESS (process
);
917 return XPROCESS (process
)->buffer
;
920 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
922 doc
: /* Return the marker for the end of the last output from PROCESS. */)
923 (register Lisp_Object process
)
925 CHECK_PROCESS (process
);
926 return XPROCESS (process
)->mark
;
929 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
931 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
932 A value of t means stop accepting output from the process.
934 When a process has a filter, its buffer is not used for output.
935 Instead, each time it does output, the entire string of output is
936 passed to the filter.
938 The filter gets two arguments: the process and the string of output.
939 The string argument is normally a multibyte string, except:
940 - if the process' input coding system is no-conversion or raw-text,
941 it is a unibyte string (the non-converted input), or else
942 - if `default-enable-multibyte-characters' is nil, it is a unibyte
943 string (the result of converting the decoded input multibyte
944 string to unibyte with `string-make-unibyte'). */)
945 (register Lisp_Object process
, Lisp_Object filter
)
947 struct Lisp_Process
*p
;
949 CHECK_PROCESS (process
);
950 p
= XPROCESS (process
);
952 /* Don't signal an error if the process' input file descriptor
953 is closed. This could make debugging Lisp more difficult,
954 for example when doing something like
956 (setq process (start-process ...))
958 (set-process-filter process ...) */
962 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
964 FD_CLR (p
->infd
, &input_wait_mask
);
965 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
967 else if (EQ (p
->filter
, Qt
)
968 /* Network or serial process not stopped: */
969 && !EQ (p
->command
, Qt
))
971 FD_SET (p
->infd
, &input_wait_mask
);
972 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
977 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
978 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
979 setup_process_coding_systems (process
);
983 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
985 doc
: /* Returns the filter function of PROCESS; nil if none.
986 See `set-process-filter' for more info on filter functions. */)
987 (register Lisp_Object process
)
989 CHECK_PROCESS (process
);
990 return XPROCESS (process
)->filter
;
993 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
995 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
996 The sentinel is called as a function when the process changes state.
997 It gets two arguments: the process, and a string describing the change. */)
998 (register Lisp_Object process
, Lisp_Object sentinel
)
1000 struct Lisp_Process
*p
;
1002 CHECK_PROCESS (process
);
1003 p
= XPROCESS (process
);
1005 p
->sentinel
= sentinel
;
1006 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1007 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1011 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1013 doc
: /* Return the sentinel of PROCESS; nil if none.
1014 See `set-process-sentinel' for more info on sentinels. */)
1015 (register Lisp_Object process
)
1017 CHECK_PROCESS (process
);
1018 return XPROCESS (process
)->sentinel
;
1021 DEFUN ("set-process-window-size", Fset_process_window_size
,
1022 Sset_process_window_size
, 3, 3, 0,
1023 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1024 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1026 CHECK_PROCESS (process
);
1027 CHECK_NATNUM (height
);
1028 CHECK_NATNUM (width
);
1030 if (XPROCESS (process
)->infd
< 0
1031 || set_window_size (XPROCESS (process
)->infd
,
1032 XINT (height
), XINT (width
)) <= 0)
1038 DEFUN ("set-process-inherit-coding-system-flag",
1039 Fset_process_inherit_coding_system_flag
,
1040 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1041 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1042 If the second argument FLAG is non-nil, then the variable
1043 `buffer-file-coding-system' of the buffer associated with PROCESS
1044 will be bound to the value of the coding system used to decode
1047 This is useful when the coding system specified for the process buffer
1048 leaves either the character code conversion or the end-of-line conversion
1049 unspecified, or if the coding system used to decode the process output
1050 is more appropriate for saving the process buffer.
1052 Binding the variable `inherit-process-coding-system' to non-nil before
1053 starting the process is an alternative way of setting the inherit flag
1054 for the process which will run. */)
1055 (register Lisp_Object process
, Lisp_Object flag
)
1057 CHECK_PROCESS (process
);
1058 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1062 DEFUN ("set-process-query-on-exit-flag",
1063 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1065 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1066 If the second argument FLAG is non-nil, Emacs will query the user before
1067 exiting or killing a buffer if PROCESS is running. */)
1068 (register Lisp_Object process
, Lisp_Object flag
)
1070 CHECK_PROCESS (process
);
1071 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1075 DEFUN ("process-query-on-exit-flag",
1076 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1078 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1079 (register Lisp_Object process
)
1081 CHECK_PROCESS (process
);
1082 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1085 #ifdef DATAGRAM_SOCKETS
1086 Lisp_Object
Fprocess_datagram_address (Lisp_Object process
);
1089 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1091 doc
: /* Return the contact info of PROCESS; t for a real child.
1092 For a network or serial connection, the value depends on the optional
1093 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1094 SERVICE) for a network connection or (PORT SPEED) for a serial
1095 connection. If KEY is t, the complete contact information for the
1096 connection is returned, else the specific value for the keyword KEY is
1097 returned. See `make-network-process' or `make-serial-process' for a
1098 list of keywords. */)
1099 (register Lisp_Object process
, Lisp_Object key
)
1101 Lisp_Object contact
;
1103 CHECK_PROCESS (process
);
1104 contact
= XPROCESS (process
)->childp
;
1106 #ifdef DATAGRAM_SOCKETS
1107 if (DATAGRAM_CONN_P (process
)
1108 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1109 contact
= Fplist_put (contact
, QCremote
,
1110 Fprocess_datagram_address (process
));
1113 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1115 if (NILP (key
) && NETCONN_P (process
))
1116 return Fcons (Fplist_get (contact
, QChost
),
1117 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1118 if (NILP (key
) && SERIALCONN_P (process
))
1119 return Fcons (Fplist_get (contact
, QCport
),
1120 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1121 return Fplist_get (contact
, key
);
1124 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1126 doc
: /* Return the plist of PROCESS. */)
1127 (register Lisp_Object process
)
1129 CHECK_PROCESS (process
);
1130 return XPROCESS (process
)->plist
;
1133 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1135 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1136 (register Lisp_Object process
, Lisp_Object plist
)
1138 CHECK_PROCESS (process
);
1141 XPROCESS (process
)->plist
= plist
;
1145 #if 0 /* Turned off because we don't currently record this info
1146 in the process. Perhaps add it. */
1147 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1148 doc
: /* Return the connection type of PROCESS.
1149 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1150 a socket connection. */)
1151 (Lisp_Object process
)
1153 return XPROCESS (process
)->type
;
1157 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1158 doc
: /* Return the connection type of PROCESS.
1159 The value is either the symbol `real', `network', or `serial'.
1160 PROCESS may be a process, a buffer, the name of a process or buffer, or
1161 nil, indicating the current buffer's process. */)
1162 (Lisp_Object process
)
1165 proc
= get_process (process
);
1166 return XPROCESS (proc
)->type
;
1169 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1171 doc
: /* Convert network ADDRESS from internal format to a string.
1172 A 4 or 5 element vector represents an IPv4 address (with port number).
1173 An 8 or 9 element vector represents an IPv6 address (with port number).
1174 If optional second argument OMIT-PORT is non-nil, don't include a port
1175 number in the string, even when present in ADDRESS.
1176 Returns nil if format of ADDRESS is invalid. */)
1177 (Lisp_Object address
, Lisp_Object omit_port
)
1182 if (STRINGP (address
)) /* AF_LOCAL */
1185 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1187 register struct Lisp_Vector
*p
= XVECTOR (address
);
1188 Lisp_Object args
[10];
1191 if (p
->size
== 4 || (p
->size
== 5 && !NILP (omit_port
)))
1193 args
[0] = build_string ("%d.%d.%d.%d");
1196 else if (p
->size
== 5)
1198 args
[0] = build_string ("%d.%d.%d.%d:%d");
1201 else if (p
->size
== 8 || (p
->size
== 9 && !NILP (omit_port
)))
1203 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1206 else if (p
->size
== 9)
1208 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1214 for (i
= 0; i
< nargs
; i
++)
1216 EMACS_INT element
= XINT (p
->contents
[i
]);
1218 if (element
< 0 || element
> 65535)
1221 if (nargs
<= 5 /* IPv4 */
1222 && i
< 4 /* host, not port */
1226 args
[i
+1] = p
->contents
[i
];
1229 return Fformat (nargs
+1, args
);
1232 if (CONSP (address
))
1234 Lisp_Object args
[2];
1235 args
[0] = build_string ("<Family %d>");
1236 args
[1] = Fcar (address
);
1237 return Fformat (2, args
);
1244 list_processes_1 (Lisp_Object query_only
)
1246 register Lisp_Object tail
;
1247 Lisp_Object proc
, minspace
;
1248 register struct Lisp_Process
*p
;
1250 int w_proc
, w_buffer
, w_tty
;
1252 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1254 w_proc
= 4; /* Proc */
1255 w_buffer
= 6; /* Buffer */
1256 w_tty
= 0; /* Omit if no ttys */
1258 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
1262 proc
= Fcdr (XCAR (tail
));
1263 p
= XPROCESS (proc
);
1266 if (!NILP (query_only
) && p
->kill_without_query
)
1268 if (STRINGP (p
->name
)
1269 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1271 if (!NILP (p
->buffer
))
1273 if (NILP (BVAR (XBUFFER (p
->buffer
), name
)))
1276 w_buffer
= 8; /* (Killed) */
1278 else if ((i
= SCHARS (BVAR (XBUFFER (p
->buffer
), name
)), (i
> w_buffer
)))
1281 if (STRINGP (p
->tty_name
)
1282 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1286 XSETFASTINT (i_status
, w_proc
+ 1);
1287 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1290 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1291 XSETFASTINT (i_command
, XFASTINT (i_tty
) + w_tty
+ 1);
1296 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1299 XSETFASTINT (minspace
, 1);
1301 set_buffer_internal (XBUFFER (Vstandard_output
));
1302 BVAR (current_buffer
, undo_list
) = Qt
;
1304 BVAR (current_buffer
, truncate_lines
) = Qt
;
1306 write_string ("Proc", -1);
1307 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1308 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1311 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1313 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1314 write_string ("\n", -1);
1316 write_string ("----", -1);
1317 Findent_to (i_status
, minspace
); write_string ("------", -1);
1318 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1321 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1323 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1324 write_string ("\n", -1);
1326 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
1330 proc
= Fcdr (XCAR (tail
));
1331 p
= XPROCESS (proc
);
1334 if (!NILP (query_only
) && p
->kill_without_query
)
1337 Finsert (1, &p
->name
);
1338 Findent_to (i_status
, minspace
);
1340 if (p
->raw_status_new
)
1343 if (CONSP (p
->status
))
1344 symbol
= XCAR (p
->status
);
1346 if (EQ (symbol
, Qsignal
))
1347 Fprinc (symbol
, Qnil
);
1348 else if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1350 if (EQ (symbol
, Qexit
))
1351 write_string ("closed", -1);
1352 else if (EQ (p
->command
, Qt
))
1353 write_string ("stopped", -1);
1354 else if (EQ (symbol
, Qrun
))
1355 write_string ("open", -1);
1357 Fprinc (symbol
, Qnil
);
1359 else if (SERIALCONN1_P (p
))
1361 write_string ("running", -1);
1364 Fprinc (symbol
, Qnil
);
1366 if (EQ (symbol
, Qexit
))
1369 tem
= Fcar (Fcdr (p
->status
));
1372 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1373 write_string (tembuf
, -1);
1377 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
) || EQ (symbol
, Qclosed
))
1380 Findent_to (i_buffer
, minspace
);
1381 if (NILP (p
->buffer
))
1382 insert_string ("(none)");
1383 else if (NILP (BVAR (XBUFFER (p
->buffer
), name
)))
1384 insert_string ("(Killed)");
1386 Finsert (1, &BVAR (XBUFFER (p
->buffer
), name
));
1390 Findent_to (i_tty
, minspace
);
1391 if (STRINGP (p
->tty_name
))
1392 Finsert (1, &p
->tty_name
);
1395 Findent_to (i_command
, minspace
);
1397 if (EQ (p
->status
, Qlisten
))
1399 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1400 if (INTEGERP (port
))
1401 port
= Fnumber_to_string (port
);
1403 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1404 sprintf (tembuf
, "(network %s server on %s)\n",
1405 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1406 (STRINGP (port
) ? SSDATA (port
) : "?"));
1407 insert_string (tembuf
);
1409 else if (NETCONN1_P (p
))
1411 /* For a local socket, there is no host name,
1412 so display service instead. */
1413 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1414 if (!STRINGP (host
))
1416 host
= Fplist_get (p
->childp
, QCservice
);
1417 if (INTEGERP (host
))
1418 host
= Fnumber_to_string (host
);
1421 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1422 sprintf (tembuf
, "(network %s connection to %s)\n",
1423 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1424 (STRINGP (host
) ? SSDATA (host
) : "?"));
1425 insert_string (tembuf
);
1427 else if (SERIALCONN1_P (p
))
1429 Lisp_Object port
= Fplist_get (p
->childp
, QCport
);
1430 Lisp_Object speed
= Fplist_get (p
->childp
, QCspeed
);
1431 insert_string ("(serial port ");
1433 insert_string (SSDATA (port
));
1435 insert_string ("?");
1436 if (INTEGERP (speed
))
1438 sprintf (tembuf
, " at %ld b/s", (long) XINT (speed
));
1439 insert_string (tembuf
);
1441 insert_string (")\n");
1445 Lisp_Object tem
= p
->command
;
1448 Lisp_Object tem1
= Fcar (tem
);
1455 insert_string (" ");
1457 insert_string ("\n");
1462 status_notify (NULL
);
1463 redisplay_preserve_echo_area (13);
1468 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1469 doc
: /* Display a list of all processes.
1470 If optional argument QUERY-ONLY is non-nil, only processes with
1471 the query-on-exit flag set will be listed.
1472 Any process listed as exited or signaled is actually eliminated
1473 after the listing is made. */)
1474 (Lisp_Object query_only
)
1476 internal_with_output_to_temp_buffer ("*Process List*",
1477 list_processes_1
, query_only
);
1481 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1482 doc
: /* Return a list of all processes. */)
1485 return Fmapcar (Qcdr
, Vprocess_alist
);
1488 /* Starting asynchronous inferior processes. */
1490 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1492 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1493 doc
: /* Start a program in a subprocess. Return the process object for it.
1494 NAME is name for process. It is modified if necessary to make it unique.
1495 BUFFER is the buffer (or buffer name) to associate with the process.
1497 Process output (both standard output and standard error streams) goes
1498 at end of BUFFER, unless you specify an output stream or filter
1499 function to handle the output. BUFFER may also be nil, meaning that
1500 this process is not associated with any buffer.
1502 PROGRAM is the program file name. It is searched for in PATH. If
1503 nil, just associate a pty with the buffer. Remaining arguments are
1504 strings to give program as arguments.
1506 If you want to separate standard output from standard error, invoke
1507 the command through a shell and redirect one of them using the shell
1510 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1511 (size_t nargs
, register Lisp_Object
*args
)
1513 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1514 register unsigned char **new_argv
;
1516 int count
= SPECPDL_INDEX ();
1520 buffer
= Fget_buffer_create (buffer
);
1522 /* Make sure that the child will be able to chdir to the current
1523 buffer's current directory, or its unhandled equivalent. We
1524 can't just have the child check for an error when it does the
1525 chdir, since it's in a vfork.
1527 We have to GCPRO around this because Fexpand_file_name and
1528 Funhandled_file_name_directory might call a file name handling
1529 function. The argument list is protected by the caller, so all
1530 we really have to worry about is buffer. */
1532 struct gcpro gcpro1
, gcpro2
;
1534 current_dir
= BVAR (current_buffer
, directory
);
1536 GCPRO2 (buffer
, current_dir
);
1538 current_dir
= Funhandled_file_name_directory (current_dir
);
1539 if (NILP (current_dir
))
1540 /* If the file name handler says that current_dir is unreachable, use
1541 a sensible default. */
1542 current_dir
= build_string ("~/");
1543 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1544 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1545 report_file_error ("Setting current directory",
1546 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1552 CHECK_STRING (name
);
1556 if (!NILP (program
))
1557 CHECK_STRING (program
);
1559 proc
= make_process (name
);
1560 /* If an error occurs and we can't start the process, we want to
1561 remove it from the process list. This means that each error
1562 check in create_process doesn't need to call remove_process
1563 itself; it's all taken care of here. */
1564 record_unwind_protect (start_process_unwind
, proc
);
1566 XPROCESS (proc
)->childp
= Qt
;
1567 XPROCESS (proc
)->plist
= Qnil
;
1568 XPROCESS (proc
)->type
= Qreal
;
1569 XPROCESS (proc
)->buffer
= buffer
;
1570 XPROCESS (proc
)->sentinel
= Qnil
;
1571 XPROCESS (proc
)->filter
= Qnil
;
1572 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1575 /* AKA GNUTLS_INITSTAGE(proc). */
1576 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1577 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1580 #ifdef ADAPTIVE_READ_BUFFERING
1581 XPROCESS (proc
)->adaptive_read_buffering
1582 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1583 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1586 /* Make the process marker point into the process buffer (if any). */
1587 if (BUFFERP (buffer
))
1588 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1589 BUF_ZV (XBUFFER (buffer
)),
1590 BUF_ZV_BYTE (XBUFFER (buffer
)));
1593 /* Decide coding systems for communicating with the process. Here
1594 we don't setup the structure coding_system nor pay attention to
1595 unibyte mode. They are done in create_process. */
1597 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1598 Lisp_Object coding_systems
= Qt
;
1599 Lisp_Object val
, *args2
;
1600 struct gcpro gcpro1
, gcpro2
;
1602 val
= Vcoding_system_for_read
;
1605 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1606 args2
[0] = Qstart_process
;
1607 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1608 GCPRO2 (proc
, current_dir
);
1609 if (!NILP (program
))
1610 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1612 if (CONSP (coding_systems
))
1613 val
= XCAR (coding_systems
);
1614 else if (CONSP (Vdefault_process_coding_system
))
1615 val
= XCAR (Vdefault_process_coding_system
);
1617 XPROCESS (proc
)->decode_coding_system
= val
;
1619 val
= Vcoding_system_for_write
;
1622 if (EQ (coding_systems
, Qt
))
1624 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1625 args2
[0] = Qstart_process
;
1626 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1627 GCPRO2 (proc
, current_dir
);
1628 if (!NILP (program
))
1629 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1632 if (CONSP (coding_systems
))
1633 val
= XCDR (coding_systems
);
1634 else if (CONSP (Vdefault_process_coding_system
))
1635 val
= XCDR (Vdefault_process_coding_system
);
1637 XPROCESS (proc
)->encode_coding_system
= val
;
1638 /* Note: At this momemnt, the above coding system may leave
1639 text-conversion or eol-conversion unspecified. They will be
1640 decided after we read output from the process and decode it by
1641 some coding system, or just before we actually send a text to
1646 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1647 XPROCESS (proc
)->decoding_carryover
= 0;
1648 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1650 XPROCESS (proc
)->inherit_coding_system_flag
1651 = !(NILP (buffer
) || !inherit_process_coding_system
);
1653 if (!NILP (program
))
1655 /* If program file name is not absolute, search our path for it.
1656 Put the name we will really use in TEM. */
1657 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1658 && !(SCHARS (program
) > 1
1659 && IS_DEVICE_SEP (SREF (program
, 1))))
1661 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1664 GCPRO4 (name
, program
, buffer
, current_dir
);
1665 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1668 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1669 tem
= Fexpand_file_name (tem
, Qnil
);
1673 if (!NILP (Ffile_directory_p (program
)))
1674 error ("Specified program for new process is a directory");
1678 /* If program file name starts with /: for quoting a magic name,
1680 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1681 && SREF (tem
, 1) == ':')
1682 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1685 Lisp_Object arg_encoding
= Qnil
;
1686 struct gcpro gcpro1
;
1689 /* Encode the file name and put it in NEW_ARGV.
1690 That's where the child will use it to execute the program. */
1691 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1693 /* Here we encode arguments by the coding system used for sending
1694 data to the process. We don't support using different coding
1695 systems for encoding arguments and for encoding data sent to the
1698 for (i
= 3; i
< nargs
; i
++)
1700 tem
= Fcons (args
[i
], tem
);
1701 CHECK_STRING (XCAR (tem
));
1702 if (STRING_MULTIBYTE (XCAR (tem
)))
1704 if (NILP (arg_encoding
))
1705 arg_encoding
= (complement_process_encoding_system
1706 (XPROCESS (proc
)->encode_coding_system
));
1708 code_convert_string_norecord
1709 (XCAR (tem
), arg_encoding
, 1));
1716 /* Now that everything is encoded we can collect the strings into
1718 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1719 new_argv
[nargs
- 2] = 0;
1721 for (i
= nargs
- 2; i
-- != 0; )
1723 new_argv
[i
] = SDATA (XCAR (tem
));
1727 create_process (proc
, (char **) new_argv
, current_dir
);
1732 return unbind_to (count
, proc
);
1735 /* This function is the unwind_protect form for Fstart_process. If
1736 PROC doesn't have its pid set, then we know someone has signaled
1737 an error and the process wasn't started successfully, so we should
1738 remove it from the process list. */
1740 start_process_unwind (Lisp_Object proc
)
1742 if (!PROCESSP (proc
))
1745 /* Was PROC started successfully? */
1746 if (XPROCESS (proc
)->pid
== -1)
1747 remove_process (proc
);
1753 create_process_1 (struct atimer
*timer
)
1755 /* Nothing to do. */
1760 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1762 int inchannel
, outchannel
;
1765 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1766 int wait_child_setup
[2];
1770 struct sigaction sigint_action
;
1771 struct sigaction sigquit_action
;
1772 struct sigaction sigpipe_action
;
1774 struct sigaction sighup_action
;
1776 /* Use volatile to protect variables from being clobbered by longjmp. */
1777 volatile int forkin
, forkout
;
1778 volatile int pty_flag
= 0;
1780 extern char **environ
;
1783 inchannel
= outchannel
= -1;
1786 if (!NILP (Vprocess_connection_type
))
1787 outchannel
= inchannel
= allocate_pty ();
1791 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1792 /* On most USG systems it does not work to open the pty's tty here,
1793 then close it and reopen it in the child. */
1795 /* Don't let this terminal become our controlling terminal
1796 (in case we don't have one). */
1797 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1799 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1802 report_file_error ("Opening pty", Qnil
);
1804 forkin
= forkout
= -1;
1805 #endif /* not USG, or USG_SUBTTY_WORKS */
1809 #endif /* HAVE_PTYS */
1814 report_file_error ("Creating pipe", Qnil
);
1820 emacs_close (inchannel
);
1821 emacs_close (forkout
);
1822 report_file_error ("Creating pipe", Qnil
);
1828 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1832 tem
= pipe (wait_child_setup
);
1834 report_file_error ("Creating pipe", Qnil
);
1835 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1837 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1840 emacs_close (wait_child_setup
[0]);
1841 emacs_close (wait_child_setup
[1]);
1842 report_file_error ("Setting file descriptor flags", Qnil
);
1848 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1849 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1852 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1853 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1857 /* Record this as an active process, with its channels.
1858 As a result, child_setup will close Emacs's side of the pipes. */
1859 chan_process
[inchannel
] = process
;
1860 XPROCESS (process
)->infd
= inchannel
;
1861 XPROCESS (process
)->outfd
= outchannel
;
1863 /* Previously we recorded the tty descriptor used in the subprocess.
1864 It was only used for getting the foreground tty process, so now
1865 we just reopen the device (see emacs_get_tty_pgrp) as this is
1866 more portable (see USG_SUBTTY_WORKS above). */
1868 XPROCESS (process
)->pty_flag
= pty_flag
;
1869 XPROCESS (process
)->status
= Qrun
;
1870 setup_process_coding_systems (process
);
1872 /* Delay interrupts until we have a chance to store
1873 the new fork's pid in its process structure */
1874 sigemptyset (&blocked
);
1876 sigaddset (&blocked
, SIGCHLD
);
1878 #ifdef HAVE_WORKING_VFORK
1879 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1880 this sets the parent's signal handlers as well as the child's.
1881 So delay all interrupts whose handlers the child might munge,
1882 and record the current handlers so they can be restored later. */
1883 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1884 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1885 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1887 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1889 #endif /* HAVE_WORKING_VFORK */
1890 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1892 FD_SET (inchannel
, &input_wait_mask
);
1893 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1894 if (inchannel
> max_process_desc
)
1895 max_process_desc
= inchannel
;
1897 /* Until we store the proper pid, enable sigchld_handler
1898 to recognize an unknown pid as standing for this process.
1899 It is very important not to let this `marker' value stay
1900 in the table after this function has returned; if it does
1901 it might cause call-process to hang and subsequent asynchronous
1902 processes to get their return values scrambled. */
1903 XPROCESS (process
)->pid
= -1;
1908 /* child_setup must clobber environ on systems with true vfork.
1909 Protect it from permanent change. */
1910 char **save_environ
= environ
;
1911 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1916 #endif /* not WINDOWSNT */
1918 int xforkin
= forkin
;
1919 int xforkout
= forkout
;
1921 #if 0 /* This was probably a mistake--it duplicates code later on,
1922 but fails to handle all the cases. */
1923 /* Make sure SIGCHLD is not blocked in the child. */
1924 sigsetmask (SIGEMPTYMASK
);
1927 /* Make the pty be the controlling terminal of the process. */
1929 /* First, disconnect its current controlling terminal. */
1931 /* We tried doing setsid only if pty_flag, but it caused
1932 process_set_signal to fail on SGI when using a pipe. */
1934 /* Make the pty's terminal the controlling terminal. */
1935 if (pty_flag
&& xforkin
>= 0)
1938 /* We ignore the return value
1939 because faith@cs.unc.edu says that is necessary on Linux. */
1940 ioctl (xforkin
, TIOCSCTTY
, 0);
1943 #else /* not HAVE_SETSID */
1945 /* It's very important to call setpgrp here and no time
1946 afterwards. Otherwise, we lose our controlling tty which
1947 is set when we open the pty. */
1950 #endif /* not HAVE_SETSID */
1951 #if defined (LDISC1)
1952 if (pty_flag
&& xforkin
>= 0)
1955 tcgetattr (xforkin
, &t
);
1957 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1958 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1961 #if defined (NTTYDISC) && defined (TIOCSETD)
1962 if (pty_flag
&& xforkin
>= 0)
1964 /* Use new line discipline. */
1965 int ldisc
= NTTYDISC
;
1966 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1971 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1972 can do TIOCSPGRP only to the process's controlling tty. */
1975 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1976 I can't test it since I don't have 4.3. */
1977 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1980 ioctl (j
, TIOCNOTTY
, 0);
1984 /* In order to get a controlling terminal on some versions
1985 of BSD, it is necessary to put the process in pgrp 0
1986 before it opens the terminal. */
1994 #endif /* TIOCNOTTY */
1996 #if !defined (DONT_REOPEN_PTY)
1997 /*** There is a suggestion that this ought to be a
1998 conditional on TIOCSPGRP,
1999 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2000 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2001 that system does seem to need this code, even though
2002 both HAVE_SETSID and TIOCSCTTY are defined. */
2003 /* Now close the pty (if we had it open) and reopen it.
2004 This makes the pty the controlling terminal of the subprocess. */
2008 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2011 emacs_close (xforkin
);
2012 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2016 emacs_write (1, "Couldn't open the pty terminal ", 31);
2017 emacs_write (1, pty_name
, strlen (pty_name
));
2018 emacs_write (1, "\n", 1);
2023 #endif /* not DONT_REOPEN_PTY */
2025 #ifdef SETUP_SLAVE_PTY
2030 #endif /* SETUP_SLAVE_PTY */
2032 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2033 Now reenable it in the child, so it will die when we want it to. */
2035 signal (SIGHUP
, SIG_DFL
);
2037 #endif /* HAVE_PTYS */
2039 signal (SIGINT
, SIG_DFL
);
2040 signal (SIGQUIT
, SIG_DFL
);
2041 /* GConf causes us to ignore SIGPIPE, make sure it is restored
2043 signal (SIGPIPE
, SIG_DFL
);
2045 /* Stop blocking signals in the child. */
2046 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2049 child_setup_tty (xforkout
);
2051 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2052 new_argv
, 1, encoded_current_dir
);
2053 #else /* not WINDOWSNT */
2055 emacs_close (wait_child_setup
[0]);
2057 child_setup (xforkin
, xforkout
, xforkout
,
2058 new_argv
, 1, encoded_current_dir
);
2059 #endif /* not WINDOWSNT */
2061 environ
= save_environ
;
2066 /* This runs in the Emacs process. */
2070 emacs_close (forkin
);
2071 if (forkin
!= forkout
&& forkout
>= 0)
2072 emacs_close (forkout
);
2076 /* vfork succeeded. */
2077 XPROCESS (process
)->pid
= pid
;
2080 register_child (pid
, inchannel
);
2081 #endif /* WINDOWSNT */
2083 /* If the subfork execv fails, and it exits,
2084 this close hangs. I don't know why.
2085 So have an interrupt jar it loose. */
2087 struct atimer
*timer
;
2091 EMACS_SET_SECS_USECS (offset
, 1, 0);
2092 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2095 emacs_close (forkin
);
2097 cancel_atimer (timer
);
2101 if (forkin
!= forkout
&& forkout
>= 0)
2102 emacs_close (forkout
);
2106 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2109 XPROCESS (process
)->tty_name
= Qnil
;
2111 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
2112 /* Wait for child_setup to complete in case that vfork is
2113 actually defined as fork. The descriptor wait_child_setup[1]
2114 of a pipe is closed at the child side either by close-on-exec
2115 on successful execvp or the _exit call in child_setup. */
2119 emacs_close (wait_child_setup
[1]);
2120 emacs_read (wait_child_setup
[0], &dummy
, 1);
2121 emacs_close (wait_child_setup
[0]);
2126 /* Restore the signal state whether vfork succeeded or not.
2127 (We will signal an error, below, if it failed.) */
2128 #ifdef HAVE_WORKING_VFORK
2129 /* Restore the parent's signal handlers. */
2130 sigaction (SIGINT
, &sigint_action
, 0);
2131 sigaction (SIGQUIT
, &sigquit_action
, 0);
2132 sigaction (SIGPIPE
, &sigpipe_action
, 0);
2134 sigaction (SIGHUP
, &sighup_action
, 0);
2136 #endif /* HAVE_WORKING_VFORK */
2137 /* Stop blocking signals in the parent. */
2138 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2140 /* Now generate the error if vfork failed. */
2142 report_file_error ("Doing vfork", Qnil
);
2146 create_pty (Lisp_Object process
)
2148 int inchannel
, outchannel
;
2150 /* Use volatile to protect variables from being clobbered by longjmp. */
2151 volatile int pty_flag
= 0;
2153 inchannel
= outchannel
= -1;
2156 if (!NILP (Vprocess_connection_type
))
2157 outchannel
= inchannel
= allocate_pty ();
2161 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
2162 /* On most USG systems it does not work to open the pty's tty here,
2163 then close it and reopen it in the child. */
2165 /* Don't let this terminal become our controlling terminal
2166 (in case we don't have one). */
2167 volatile int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2169 volatile int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
2172 report_file_error ("Opening pty", Qnil
);
2173 #if defined (DONT_REOPEN_PTY)
2174 /* In the case that vfork is defined as fork, the parent process
2175 (Emacs) may send some data before the child process completes
2176 tty options setup. So we setup tty before forking. */
2177 child_setup_tty (forkout
);
2178 #endif /* DONT_REOPEN_PTY */
2179 #endif /* not USG, or USG_SUBTTY_WORKS */
2182 #endif /* HAVE_PTYS */
2185 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2186 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2189 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2190 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2194 /* Record this as an active process, with its channels.
2195 As a result, child_setup will close Emacs's side of the pipes. */
2196 chan_process
[inchannel
] = process
;
2197 XPROCESS (process
)->infd
= inchannel
;
2198 XPROCESS (process
)->outfd
= outchannel
;
2200 /* Previously we recorded the tty descriptor used in the subprocess.
2201 It was only used for getting the foreground tty process, so now
2202 we just reopen the device (see emacs_get_tty_pgrp) as this is
2203 more portable (see USG_SUBTTY_WORKS above). */
2205 XPROCESS (process
)->pty_flag
= pty_flag
;
2206 XPROCESS (process
)->status
= Qrun
;
2207 setup_process_coding_systems (process
);
2209 FD_SET (inchannel
, &input_wait_mask
);
2210 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2211 if (inchannel
> max_process_desc
)
2212 max_process_desc
= inchannel
;
2214 XPROCESS (process
)->pid
= -2;
2217 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2220 XPROCESS (process
)->tty_name
= Qnil
;
2224 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2225 The address family of sa is not included in the result. */
2228 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2230 Lisp_Object address
;
2233 register struct Lisp_Vector
*p
;
2235 /* Workaround for a bug in getsockname on BSD: Names bound to
2236 sockets in the UNIX domain are inaccessible; getsockname returns
2237 a zero length name. */
2238 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2239 return empty_unibyte_string
;
2241 switch (sa
->sa_family
)
2245 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2246 len
= sizeof (sin
->sin_addr
) + 1;
2247 address
= Fmake_vector (make_number (len
), Qnil
);
2248 p
= XVECTOR (address
);
2249 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2250 cp
= (unsigned char *) &sin
->sin_addr
;
2256 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2257 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2258 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2259 address
= Fmake_vector (make_number (len
), Qnil
);
2260 p
= XVECTOR (address
);
2261 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2262 for (i
= 0; i
< len
; i
++)
2263 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2267 #ifdef HAVE_LOCAL_SOCKETS
2270 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2271 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2272 if (sockun
->sun_path
[i
] == 0)
2274 return make_unibyte_string (sockun
->sun_path
, i
);
2278 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2279 address
= Fcons (make_number (sa
->sa_family
),
2280 Fmake_vector (make_number (len
), Qnil
));
2281 p
= XVECTOR (XCDR (address
));
2282 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2288 p
->contents
[i
++] = make_number (*cp
++);
2294 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2297 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2299 register struct Lisp_Vector
*p
;
2301 if (VECTORP (address
))
2303 p
= XVECTOR (address
);
2307 return sizeof (struct sockaddr_in
);
2310 else if (p
->size
== 9)
2312 *familyp
= AF_INET6
;
2313 return sizeof (struct sockaddr_in6
);
2317 #ifdef HAVE_LOCAL_SOCKETS
2318 else if (STRINGP (address
))
2320 *familyp
= AF_LOCAL
;
2321 return sizeof (struct sockaddr_un
);
2324 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2326 struct sockaddr
*sa
;
2327 *familyp
= XINT (XCAR (address
));
2328 p
= XVECTOR (XCDR (address
));
2329 return p
->size
+ sizeof (sa
->sa_family
);
2334 /* Convert an address object (vector or string) to an internal sockaddr.
2336 The address format has been basically validated by
2337 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2338 it could have come from user data. So if FAMILY is not valid,
2339 we return after zeroing *SA. */
2342 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2344 register struct Lisp_Vector
*p
;
2345 register unsigned char *cp
= NULL
;
2348 memset (sa
, 0, len
);
2350 if (VECTORP (address
))
2352 p
= XVECTOR (address
);
2353 if (family
== AF_INET
)
2355 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2356 len
= sizeof (sin
->sin_addr
) + 1;
2357 i
= XINT (p
->contents
[--len
]);
2358 sin
->sin_port
= htons (i
);
2359 cp
= (unsigned char *)&sin
->sin_addr
;
2360 sa
->sa_family
= family
;
2363 else if (family
== AF_INET6
)
2365 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2366 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2367 len
= sizeof (sin6
->sin6_addr
) + 1;
2368 i
= XINT (p
->contents
[--len
]);
2369 sin6
->sin6_port
= htons (i
);
2370 for (i
= 0; i
< len
; i
++)
2371 if (INTEGERP (p
->contents
[i
]))
2373 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2376 sa
->sa_family
= family
;
2383 else if (STRINGP (address
))
2385 #ifdef HAVE_LOCAL_SOCKETS
2386 if (family
== AF_LOCAL
)
2388 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2389 cp
= SDATA (address
);
2390 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2391 sockun
->sun_path
[i
] = *cp
++;
2392 sa
->sa_family
= family
;
2399 p
= XVECTOR (XCDR (address
));
2400 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2403 for (i
= 0; i
< len
; i
++)
2404 if (INTEGERP (p
->contents
[i
]))
2405 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2408 #ifdef DATAGRAM_SOCKETS
2409 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2411 doc
: /* Get the current datagram address associated with PROCESS. */)
2412 (Lisp_Object process
)
2416 CHECK_PROCESS (process
);
2418 if (!DATAGRAM_CONN_P (process
))
2421 channel
= XPROCESS (process
)->infd
;
2422 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2423 datagram_address
[channel
].len
);
2426 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2428 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2429 Returns nil upon error setting address, ADDRESS otherwise. */)
2430 (Lisp_Object process
, Lisp_Object address
)
2435 CHECK_PROCESS (process
);
2437 if (!DATAGRAM_CONN_P (process
))
2440 channel
= XPROCESS (process
)->infd
;
2442 len
= get_lisp_to_sockaddr_size (address
, &family
);
2443 if (datagram_address
[channel
].len
!= len
)
2445 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2451 static const struct socket_options
{
2452 /* The name of this option. Should be lowercase version of option
2453 name without SO_ prefix. */
2455 /* Option level SOL_... */
2457 /* Option number SO_... */
2459 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2460 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2461 } socket_options
[] =
2463 #ifdef SO_BINDTODEVICE
2464 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2467 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2470 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2473 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2476 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2479 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2482 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2485 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2487 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2490 /* Set option OPT to value VAL on socket S.
2492 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2493 Signals an error if setting a known option fails.
2497 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2500 const struct socket_options
*sopt
;
2505 name
= SSDATA (SYMBOL_NAME (opt
));
2506 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2507 if (strcmp (name
, sopt
->name
) == 0)
2510 switch (sopt
->opttype
)
2515 optval
= NILP (val
) ? 0 : 1;
2516 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2517 &optval
, sizeof (optval
));
2525 optval
= XINT (val
);
2527 error ("Bad option value for %s", name
);
2528 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2529 &optval
, sizeof (optval
));
2533 #ifdef SO_BINDTODEVICE
2536 char devname
[IFNAMSIZ
+1];
2538 /* This is broken, at least in the Linux 2.4 kernel.
2539 To unbind, the arg must be a zero integer, not the empty string.
2540 This should work on all systems. KFS. 2003-09-23. */
2541 memset (devname
, 0, sizeof devname
);
2544 char *arg
= SSDATA (val
);
2545 int len
= min (strlen (arg
), IFNAMSIZ
);
2546 memcpy (devname
, arg
, len
);
2548 else if (!NILP (val
))
2549 error ("Bad option value for %s", name
);
2550 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2559 struct linger linger
;
2562 linger
.l_linger
= 0;
2564 linger
.l_linger
= XINT (val
);
2566 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2567 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2568 &linger
, sizeof (linger
));
2578 report_file_error ("Cannot set network option",
2579 Fcons (opt
, Fcons (val
, Qnil
)));
2580 return (1 << sopt
->optbit
);
2584 DEFUN ("set-network-process-option",
2585 Fset_network_process_option
, Sset_network_process_option
,
2587 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2588 See `make-network-process' for a list of options and values.
2589 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2590 OPTION is not a supported option, return nil instead; otherwise return t. */)
2591 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2594 struct Lisp_Process
*p
;
2596 CHECK_PROCESS (process
);
2597 p
= XPROCESS (process
);
2598 if (!NETCONN1_P (p
))
2599 error ("Process is not a network process");
2603 error ("Process is not running");
2605 if (set_socket_option (s
, option
, value
))
2607 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2611 if (NILP (no_error
))
2612 error ("Unknown or unsupported option");
2618 DEFUN ("serial-process-configure",
2619 Fserial_process_configure
,
2620 Sserial_process_configure
,
2622 doc
: /* Configure speed, bytesize, etc. of a serial process.
2624 Arguments are specified as keyword/argument pairs. Attributes that
2625 are not given are re-initialized from the process's current
2626 configuration (available via the function `process-contact') or set to
2627 reasonable default values. The following arguments are defined:
2633 -- Any of these arguments can be given to identify the process that is
2634 to be configured. If none of these arguments is given, the current
2635 buffer's process is used.
2637 :speed SPEED -- SPEED is the speed of the serial port in bits per
2638 second, also called baud rate. Any value can be given for SPEED, but
2639 most serial ports work only at a few defined values between 1200 and
2640 115200, with 9600 being the most common value. If SPEED is nil, the
2641 serial port is not configured any further, i.e., all other arguments
2642 are ignored. This may be useful for special serial ports such as
2643 Bluetooth-to-serial converters which can only be configured through AT
2644 commands. A value of nil for SPEED can be used only when passed
2645 through `make-serial-process' or `serial-term'.
2647 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2648 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2650 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2651 `odd' (use odd parity), or the symbol `even' (use even parity). If
2652 PARITY is not given, no parity is used.
2654 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2655 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2656 is not given or nil, 1 stopbit is used.
2658 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2659 flowcontrol to be used, which is either nil (don't use flowcontrol),
2660 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2661 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2662 flowcontrol is used.
2664 `serial-process-configure' is called by `make-serial-process' for the
2665 initial configuration of the serial port.
2669 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2671 \(serial-process-configure
2672 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2674 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2676 usage: (serial-process-configure &rest ARGS) */)
2677 (size_t nargs
, Lisp_Object
*args
)
2679 struct Lisp_Process
*p
;
2680 Lisp_Object contact
= Qnil
;
2681 Lisp_Object proc
= Qnil
;
2682 struct gcpro gcpro1
;
2684 contact
= Flist (nargs
, args
);
2687 proc
= Fplist_get (contact
, QCprocess
);
2689 proc
= Fplist_get (contact
, QCname
);
2691 proc
= Fplist_get (contact
, QCbuffer
);
2693 proc
= Fplist_get (contact
, QCport
);
2694 proc
= get_process (proc
);
2695 p
= XPROCESS (proc
);
2696 if (!EQ (p
->type
, Qserial
))
2697 error ("Not a serial process");
2699 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2705 serial_configure (p
, contact
);
2711 /* Used by make-serial-process to recover from errors. */
2713 make_serial_process_unwind (Lisp_Object proc
)
2715 if (!PROCESSP (proc
))
2717 remove_process (proc
);
2721 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2723 doc
: /* Create and return a serial port process.
2725 In Emacs, serial port connections are represented by process objects,
2726 so input and output work as for subprocesses, and `delete-process'
2727 closes a serial port connection. However, a serial process has no
2728 process id, it cannot be signaled, and the status codes are different
2729 from normal processes.
2731 `make-serial-process' creates a process and a buffer, on which you
2732 probably want to use `process-send-string'. Try \\[serial-term] for
2733 an interactive terminal. See below for examples.
2735 Arguments are specified as keyword/argument pairs. The following
2736 arguments are defined:
2738 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2739 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2740 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2741 the backslashes in strings).
2743 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2744 which is called by `make-serial-process'.
2746 :name NAME -- NAME is the name of the process. If NAME is not given,
2747 the value of PORT is used.
2749 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2750 with the process. Process output goes at the end of that buffer,
2751 unless you specify an output stream or filter function to handle the
2752 output. If BUFFER is not given, the value of NAME is used.
2754 :coding CODING -- If CODING is a symbol, it specifies the coding
2755 system used for both reading and writing for this process. If CODING
2756 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2757 ENCODING is used for writing.
2759 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2760 the process is running. If BOOL is not given, query before exiting.
2762 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2763 In the stopped state, a serial process does not accept incoming data,
2764 but you can send outgoing data. The stopped state is cleared by
2765 `continue-process' and set by `stop-process'.
2767 :filter FILTER -- Install FILTER as the process filter.
2769 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2771 :plist PLIST -- Install PLIST as the initial plist of the process.
2778 -- These arguments are handled by `serial-process-configure', which is
2779 called by `make-serial-process'.
2781 The original argument list, possibly modified by later configuration,
2782 is available via the function `process-contact'.
2786 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2788 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2790 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2792 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2794 usage: (make-serial-process &rest ARGS) */)
2795 (size_t nargs
, Lisp_Object
*args
)
2798 Lisp_Object proc
, contact
, port
;
2799 struct Lisp_Process
*p
;
2800 struct gcpro gcpro1
;
2801 Lisp_Object name
, buffer
;
2802 Lisp_Object tem
, val
;
2803 int specpdl_count
= -1;
2808 contact
= Flist (nargs
, args
);
2811 port
= Fplist_get (contact
, QCport
);
2813 error ("No port specified");
2814 CHECK_STRING (port
);
2816 if (NILP (Fplist_member (contact
, QCspeed
)))
2817 error (":speed not specified");
2818 if (!NILP (Fplist_get (contact
, QCspeed
)))
2819 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2821 name
= Fplist_get (contact
, QCname
);
2824 CHECK_STRING (name
);
2825 proc
= make_process (name
);
2826 specpdl_count
= SPECPDL_INDEX ();
2827 record_unwind_protect (make_serial_process_unwind
, proc
);
2828 p
= XPROCESS (proc
);
2830 fd
= serial_open (SSDATA (port
));
2833 if (fd
> max_process_desc
)
2834 max_process_desc
= fd
;
2835 chan_process
[fd
] = proc
;
2837 buffer
= Fplist_get (contact
, QCbuffer
);
2840 buffer
= Fget_buffer_create (buffer
);
2843 p
->childp
= contact
;
2844 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2846 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2847 p
->filter
= Fplist_get (contact
, QCfilter
);
2849 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2850 p
->kill_without_query
= 1;
2851 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2855 if (!EQ (p
->command
, Qt
))
2857 FD_SET (fd
, &input_wait_mask
);
2858 FD_SET (fd
, &non_keyboard_wait_mask
);
2861 if (BUFFERP (buffer
))
2863 set_marker_both (p
->mark
, buffer
,
2864 BUF_ZV (XBUFFER (buffer
)),
2865 BUF_ZV_BYTE (XBUFFER (buffer
)));
2868 tem
= Fplist_member (contact
, QCcoding
);
2869 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2875 val
= XCAR (XCDR (tem
));
2879 else if (!NILP (Vcoding_system_for_read
))
2880 val
= Vcoding_system_for_read
;
2881 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2882 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2884 p
->decode_coding_system
= val
;
2889 val
= XCAR (XCDR (tem
));
2893 else if (!NILP (Vcoding_system_for_write
))
2894 val
= Vcoding_system_for_write
;
2895 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2896 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2898 p
->encode_coding_system
= val
;
2900 setup_process_coding_systems (proc
);
2901 p
->decoding_buf
= empty_unibyte_string
;
2902 p
->decoding_carryover
= 0;
2903 p
->encoding_buf
= empty_unibyte_string
;
2904 p
->inherit_coding_system_flag
2905 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2907 Fserial_process_configure (nargs
, args
);
2909 specpdl_ptr
= specpdl
+ specpdl_count
;
2915 /* Create a network stream/datagram client/server process. Treated
2916 exactly like a normal process when reading and writing. Primary
2917 differences are in status display and process deletion. A network
2918 connection has no PID; you cannot signal it. All you can do is
2919 stop/continue it and deactivate/close it via delete-process */
2921 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2923 doc
: /* Create and return a network server or client process.
2925 In Emacs, network connections are represented by process objects, so
2926 input and output work as for subprocesses and `delete-process' closes
2927 a network connection. However, a network process has no process id,
2928 it cannot be signaled, and the status codes are different from normal
2931 Arguments are specified as keyword/argument pairs. The following
2932 arguments are defined:
2934 :name NAME -- NAME is name for process. It is modified if necessary
2937 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2938 with the process. Process output goes at end of that buffer, unless
2939 you specify an output stream or filter function to handle the output.
2940 BUFFER may be also nil, meaning that this process is not associated
2943 :host HOST -- HOST is name of the host to connect to, or its IP
2944 address. The symbol `local' specifies the local host. If specified
2945 for a server process, it must be a valid name or address for the local
2946 host, and only clients connecting to that address will be accepted.
2948 :service SERVICE -- SERVICE is name of the service desired, or an
2949 integer specifying a port number to connect to. If SERVICE is t,
2950 a random port number is selected for the server. (If Emacs was
2951 compiled with getaddrinfo, a port number can also be specified as a
2952 string, e.g. "80", as well as an integer. This is not portable.)
2954 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2955 stream type connection, `datagram' creates a datagram type connection,
2956 `seqpacket' creates a reliable datagram connection.
2958 :family FAMILY -- FAMILY is the address (and protocol) family for the
2959 service specified by HOST and SERVICE. The default (nil) is to use
2960 whatever address family (IPv4 or IPv6) that is defined for the host
2961 and port number specified by HOST and SERVICE. Other address families
2963 local -- for a local (i.e. UNIX) address specified by SERVICE.
2964 ipv4 -- use IPv4 address family only.
2965 ipv6 -- use IPv6 address family only.
2967 :local ADDRESS -- ADDRESS is the local address used for the connection.
2968 This parameter is ignored when opening a client process. When specified
2969 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2971 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2972 connection. This parameter is ignored when opening a stream server
2973 process. For a datagram server process, it specifies the initial
2974 setting of the remote datagram address. When specified for a client
2975 process, the FAMILY, HOST, and SERVICE args are ignored.
2977 The format of ADDRESS depends on the address family:
2978 - An IPv4 address is represented as an vector of integers [A B C D P]
2979 corresponding to numeric IP address A.B.C.D and port number P.
2980 - A local address is represented as a string with the address in the
2981 local address space.
2982 - An "unsupported family" address is represented by a cons (F . AV)
2983 where F is the family number and AV is a vector containing the socket
2984 address data with one element per address data byte. Do not rely on
2985 this format in portable code, as it may depend on implementation
2986 defined constants, data sizes, and data structure alignment.
2988 :coding CODING -- If CODING is a symbol, it specifies the coding
2989 system used for both reading and writing for this process. If CODING
2990 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2991 ENCODING is used for writing.
2993 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2994 return without waiting for the connection to complete; instead, the
2995 sentinel function will be called with second arg matching "open" (if
2996 successful) or "failed" when the connect completes. Default is to use
2997 a blocking connect (i.e. wait) for stream type connections.
2999 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
3000 running when Emacs is exited.
3002 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
3003 In the stopped state, a server process does not accept new
3004 connections, and a client process does not handle incoming traffic.
3005 The stopped state is cleared by `continue-process' and set by
3008 :filter FILTER -- Install FILTER as the process filter.
3010 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
3011 process filter are multibyte, otherwise they are unibyte.
3012 If this keyword is not specified, the strings are multibyte if
3013 `default-enable-multibyte-characters' is non-nil.
3015 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
3017 :log LOG -- Install LOG as the server process log function. This
3018 function is called when the server accepts a network connection from a
3019 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
3020 is the server process, CLIENT is the new process for the connection,
3021 and MESSAGE is a string.
3023 :plist PLIST -- Install PLIST as the new process' initial plist.
3025 :server QLEN -- if QLEN is non-nil, create a server process for the
3026 specified FAMILY, SERVICE, and connection type (stream or datagram).
3027 If QLEN is an integer, it is used as the max. length of the server's
3028 pending connection queue (also known as the backlog); the default
3029 queue length is 5. Default is to create a client process.
3031 The following network options can be specified for this connection:
3033 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
3034 :dontroute BOOL -- Only send to directly connected hosts.
3035 :keepalive BOOL -- Send keep-alive messages on network stream.
3036 :linger BOOL or TIMEOUT -- Send queued messages before closing.
3037 :oobinline BOOL -- Place out-of-band data in receive data stream.
3038 :priority INT -- Set protocol defined priority for sent packets.
3039 :reuseaddr BOOL -- Allow reusing a recently used local address
3040 (this is allowed by default for a server process).
3041 :bindtodevice NAME -- bind to interface NAME. Using this may require
3042 special privileges on some systems.
3044 Consult the relevant system programmer's manual pages for more
3045 information on using these options.
3048 A server process will listen for and accept connections from clients.
3049 When a client connection is accepted, a new network process is created
3050 for the connection with the following parameters:
3052 - The client's process name is constructed by concatenating the server
3053 process' NAME and a client identification string.
3054 - If the FILTER argument is non-nil, the client process will not get a
3055 separate process buffer; otherwise, the client's process buffer is a newly
3056 created buffer named after the server process' BUFFER name or process
3057 NAME concatenated with the client identification string.
3058 - The connection type and the process filter and sentinel parameters are
3059 inherited from the server process' TYPE, FILTER and SENTINEL.
3060 - The client process' contact info is set according to the client's
3061 addressing information (typically an IP address and a port number).
3062 - The client process' plist is initialized from the server's plist.
3064 Notice that the FILTER and SENTINEL args are never used directly by
3065 the server process. Also, the BUFFER argument is not used directly by
3066 the server process, but via the optional :log function, accepted (and
3067 failed) connections may be logged in the server process' buffer.
3069 The original argument list, modified with the actual connection
3070 information, is available via the `process-contact' function.
3072 usage: (make-network-process &rest ARGS) */)
3073 (size_t nargs
, Lisp_Object
*args
)
3076 Lisp_Object contact
;
3077 struct Lisp_Process
*p
;
3078 #ifdef HAVE_GETADDRINFO
3079 struct addrinfo ai
, *res
, *lres
;
3080 struct addrinfo hints
;
3081 const char *portstring
;
3083 #else /* HAVE_GETADDRINFO */
3084 struct _emacs_addrinfo
3090 struct sockaddr
*ai_addr
;
3091 struct _emacs_addrinfo
*ai_next
;
3093 #endif /* HAVE_GETADDRINFO */
3094 struct sockaddr_in address_in
;
3095 #ifdef HAVE_LOCAL_SOCKETS
3096 struct sockaddr_un address_un
;
3101 int s
= -1, outch
, inch
;
3102 struct gcpro gcpro1
;
3103 int count
= SPECPDL_INDEX ();
3105 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
3107 Lisp_Object name
, buffer
, host
, service
, address
;
3108 Lisp_Object filter
, sentinel
;
3109 int is_non_blocking_client
= 0;
3110 int is_server
= 0, backlog
= 5;
3117 /* Save arguments for process-contact and clone-process. */
3118 contact
= Flist (nargs
, args
);
3122 /* Ensure socket support is loaded if available. */
3123 init_winsock (TRUE
);
3126 /* :type TYPE (nil: stream, datagram */
3127 tem
= Fplist_get (contact
, QCtype
);
3129 socktype
= SOCK_STREAM
;
3130 #ifdef DATAGRAM_SOCKETS
3131 else if (EQ (tem
, Qdatagram
))
3132 socktype
= SOCK_DGRAM
;
3134 #ifdef HAVE_SEQPACKET
3135 else if (EQ (tem
, Qseqpacket
))
3136 socktype
= SOCK_SEQPACKET
;
3139 error ("Unsupported connection type");
3142 tem
= Fplist_get (contact
, QCserver
);
3145 /* Don't support network sockets when non-blocking mode is
3146 not available, since a blocked Emacs is not useful. */
3147 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
3148 error ("Network servers not supported");
3152 backlog
= XINT (tem
);
3156 /* Make QCaddress an alias for :local (server) or :remote (client). */
3157 QCaddress
= is_server
? QClocal
: QCremote
;
3160 if (!is_server
&& socktype
!= SOCK_DGRAM
3161 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
3163 #ifndef NON_BLOCKING_CONNECT
3164 error ("Non-blocking connect not supported");
3166 is_non_blocking_client
= 1;
3170 name
= Fplist_get (contact
, QCname
);
3171 buffer
= Fplist_get (contact
, QCbuffer
);
3172 filter
= Fplist_get (contact
, QCfilter
);
3173 sentinel
= Fplist_get (contact
, QCsentinel
);
3175 CHECK_STRING (name
);
3177 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3178 ai
.ai_socktype
= socktype
;
3183 /* :local ADDRESS or :remote ADDRESS */
3184 address
= Fplist_get (contact
, QCaddress
);
3185 if (!NILP (address
))
3187 host
= service
= Qnil
;
3189 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3190 error ("Malformed :address");
3191 ai
.ai_family
= family
;
3192 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3193 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3197 /* :family FAMILY -- nil (for Inet), local, or integer. */
3198 tem
= Fplist_get (contact
, QCfamily
);
3201 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3207 #ifdef HAVE_LOCAL_SOCKETS
3208 else if (EQ (tem
, Qlocal
))
3212 else if (EQ (tem
, Qipv6
))
3215 else if (EQ (tem
, Qipv4
))
3217 else if (INTEGERP (tem
))
3218 family
= XINT (tem
);
3220 error ("Unknown address family");
3222 ai
.ai_family
= family
;
3224 /* :service SERVICE -- string, integer (port number), or t (random port). */
3225 service
= Fplist_get (contact
, QCservice
);
3227 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3228 host
= Fplist_get (contact
, QChost
);
3231 if (EQ (host
, Qlocal
))
3232 /* Depending on setup, "localhost" may map to different IPv4 and/or
3233 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3234 host
= build_string ("127.0.0.1");
3235 CHECK_STRING (host
);
3238 #ifdef HAVE_LOCAL_SOCKETS
3239 if (family
== AF_LOCAL
)
3243 message (":family local ignores the :host \"%s\" property",
3245 contact
= Fplist_put (contact
, QChost
, Qnil
);
3248 CHECK_STRING (service
);
3249 memset (&address_un
, 0, sizeof address_un
);
3250 address_un
.sun_family
= AF_LOCAL
;
3251 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3252 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3253 ai
.ai_addrlen
= sizeof address_un
;
3258 /* Slow down polling to every ten seconds.
3259 Some kernels have a bug which causes retrying connect to fail
3260 after a connect. Polling can interfere with gethostbyname too. */
3261 #ifdef POLL_FOR_INPUT
3262 if (socktype
!= SOCK_DGRAM
)
3264 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3265 bind_polling_period (10);
3269 #ifdef HAVE_GETADDRINFO
3270 /* If we have a host, use getaddrinfo to resolve both host and service.
3271 Otherwise, use getservbyname to lookup the service. */
3275 /* SERVICE can either be a string or int.
3276 Convert to a C string for later use by getaddrinfo. */
3277 if (EQ (service
, Qt
))
3279 else if (INTEGERP (service
))
3281 sprintf (portbuf
, "%ld", (long) XINT (service
));
3282 portstring
= portbuf
;
3286 CHECK_STRING (service
);
3287 portstring
= SSDATA (service
);
3292 memset (&hints
, 0, sizeof (hints
));
3294 hints
.ai_family
= family
;
3295 hints
.ai_socktype
= socktype
;
3296 hints
.ai_protocol
= 0;
3298 #ifdef HAVE_RES_INIT
3302 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3304 #ifdef HAVE_GAI_STRERROR
3305 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3307 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3313 #endif /* HAVE_GETADDRINFO */
3315 /* We end up here if getaddrinfo is not defined, or in case no hostname
3316 has been specified (e.g. for a local server process). */
3318 if (EQ (service
, Qt
))
3320 else if (INTEGERP (service
))
3321 port
= htons ((unsigned short) XINT (service
));
3324 struct servent
*svc_info
;
3325 CHECK_STRING (service
);
3326 svc_info
= getservbyname (SSDATA (service
),
3327 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3329 error ("Unknown service: %s", SDATA (service
));
3330 port
= svc_info
->s_port
;
3333 memset (&address_in
, 0, sizeof address_in
);
3334 address_in
.sin_family
= family
;
3335 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3336 address_in
.sin_port
= port
;
3338 #ifndef HAVE_GETADDRINFO
3341 struct hostent
*host_info_ptr
;
3343 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3344 as it may `hang' Emacs for a very long time. */
3348 #ifdef HAVE_RES_INIT
3352 host_info_ptr
= gethostbyname (SDATA (host
));
3357 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3358 host_info_ptr
->h_length
);
3359 family
= host_info_ptr
->h_addrtype
;
3360 address_in
.sin_family
= family
;
3363 /* Attempt to interpret host as numeric inet address */
3365 unsigned long numeric_addr
;
3366 numeric_addr
= inet_addr (SSDATA (host
));
3367 if (numeric_addr
== -1)
3368 error ("Unknown host \"%s\"", SDATA (host
));
3370 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3371 sizeof (address_in
.sin_addr
));
3375 #endif /* not HAVE_GETADDRINFO */
3377 ai
.ai_family
= family
;
3378 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3379 ai
.ai_addrlen
= sizeof address_in
;
3383 /* Do this in case we never enter the for-loop below. */
3384 count1
= SPECPDL_INDEX ();
3387 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3396 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3403 #ifdef DATAGRAM_SOCKETS
3404 if (!is_server
&& socktype
== SOCK_DGRAM
)
3406 #endif /* DATAGRAM_SOCKETS */
3408 #ifdef NON_BLOCKING_CONNECT
3409 if (is_non_blocking_client
)
3412 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3414 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3426 /* Make us close S if quit. */
3427 record_unwind_protect (close_file_unwind
, make_number (s
));
3429 /* Parse network options in the arg list.
3430 We simply ignore anything which isn't a known option (including other keywords).
3431 An error is signaled if setting a known option fails. */
3432 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3433 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3437 /* Configure as a server socket. */
3439 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3440 explicit :reuseaddr key to override this. */
3441 #ifdef HAVE_LOCAL_SOCKETS
3442 if (family
!= AF_LOCAL
)
3444 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3447 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3448 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3451 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3452 report_file_error ("Cannot bind server socket", Qnil
);
3454 #ifdef HAVE_GETSOCKNAME
3455 if (EQ (service
, Qt
))
3457 struct sockaddr_in sa1
;
3458 socklen_t len1
= sizeof (sa1
);
3459 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3461 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3462 service
= make_number (ntohs (sa1
.sin_port
));
3463 contact
= Fplist_put (contact
, QCservice
, service
);
3468 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3469 report_file_error ("Cannot listen on server socket", Qnil
);
3477 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3480 if (ret
== 0 || xerrno
== EISCONN
)
3482 /* The unwind-protect will be discarded afterwards.
3483 Likewise for immediate_quit. */
3487 #ifdef NON_BLOCKING_CONNECT
3489 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3493 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3500 if (xerrno
== EINTR
)
3502 /* Unlike most other syscalls connect() cannot be called
3503 again. (That would return EALREADY.) The proper way to
3504 wait for completion is select(). */
3512 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3519 report_file_error ("select failed", Qnil
);
3523 len
= sizeof xerrno
;
3524 eassert (FD_ISSET (s
, &fdset
));
3525 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3526 report_file_error ("getsockopt failed", Qnil
);
3528 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3532 #endif /* !WINDOWSNT */
3536 /* Discard the unwind protect closing S. */
3537 specpdl_ptr
= specpdl
+ count1
;
3542 if (xerrno
== EINTR
)
3549 #ifdef DATAGRAM_SOCKETS
3550 if (socktype
== SOCK_DGRAM
)
3552 if (datagram_address
[s
].sa
)
3554 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3555 datagram_address
[s
].len
= lres
->ai_addrlen
;
3559 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3560 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3563 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3564 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3565 conv_lisp_to_sockaddr (rfamily
, remote
,
3566 datagram_address
[s
].sa
, rlen
);
3570 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3573 contact
= Fplist_put (contact
, QCaddress
,
3574 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3575 #ifdef HAVE_GETSOCKNAME
3578 struct sockaddr_in sa1
;
3579 socklen_t len1
= sizeof (sa1
);
3580 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3581 contact
= Fplist_put (contact
, QClocal
,
3582 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3589 #ifdef HAVE_GETADDRINFO
3598 /* Discard the unwind protect for closing S, if any. */
3599 specpdl_ptr
= specpdl
+ count1
;
3601 /* Unwind bind_polling_period and request_sigio. */
3602 unbind_to (count
, Qnil
);
3606 /* If non-blocking got this far - and failed - assume non-blocking is
3607 not supported after all. This is probably a wrong assumption, but
3608 the normal blocking calls to open-network-stream handles this error
3610 if (is_non_blocking_client
)
3615 report_file_error ("make server process failed", contact
);
3617 report_file_error ("make client process failed", contact
);
3624 buffer
= Fget_buffer_create (buffer
);
3625 proc
= make_process (name
);
3627 chan_process
[inch
] = proc
;
3630 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3633 fcntl (inch
, F_SETFL
, O_NDELAY
);
3637 p
= XPROCESS (proc
);
3639 p
->childp
= contact
;
3640 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3644 p
->sentinel
= sentinel
;
3646 p
->log
= Fplist_get (contact
, QClog
);
3647 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3648 p
->kill_without_query
= 1;
3649 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3654 if (is_server
&& socktype
!= SOCK_DGRAM
)
3655 p
->status
= Qlisten
;
3657 /* Make the process marker point into the process buffer (if any). */
3658 if (BUFFERP (buffer
))
3659 set_marker_both (p
->mark
, buffer
,
3660 BUF_ZV (XBUFFER (buffer
)),
3661 BUF_ZV_BYTE (XBUFFER (buffer
)));
3663 #ifdef NON_BLOCKING_CONNECT
3664 if (is_non_blocking_client
)
3666 /* We may get here if connect did succeed immediately. However,
3667 in that case, we still need to signal this like a non-blocking
3669 p
->status
= Qconnect
;
3670 if (!FD_ISSET (inch
, &connect_wait_mask
))
3672 FD_SET (inch
, &connect_wait_mask
);
3673 FD_SET (inch
, &write_mask
);
3674 num_pending_connects
++;
3679 /* A server may have a client filter setting of Qt, but it must
3680 still listen for incoming connects unless it is stopped. */
3681 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3682 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3684 FD_SET (inch
, &input_wait_mask
);
3685 FD_SET (inch
, &non_keyboard_wait_mask
);
3688 if (inch
> max_process_desc
)
3689 max_process_desc
= inch
;
3691 tem
= Fplist_member (contact
, QCcoding
);
3692 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3693 tem
= Qnil
; /* No error message (too late!). */
3696 /* Setup coding systems for communicating with the network stream. */
3697 struct gcpro inner_gcpro1
;
3698 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3699 Lisp_Object coding_systems
= Qt
;
3700 Lisp_Object fargs
[5], val
;
3704 val
= XCAR (XCDR (tem
));
3708 else if (!NILP (Vcoding_system_for_read
))
3709 val
= Vcoding_system_for_read
;
3710 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3711 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3712 /* We dare not decode end-of-line format by setting VAL to
3713 Qraw_text, because the existing Emacs Lisp libraries
3714 assume that they receive bare code including a sequene of
3719 if (NILP (host
) || NILP (service
))
3720 coding_systems
= Qnil
;
3723 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3724 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3725 GCPRO1_VAR (proc
, inner_gcpro
);
3726 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3727 UNGCPRO_VAR (inner_gcpro
);
3729 if (CONSP (coding_systems
))
3730 val
= XCAR (coding_systems
);
3731 else if (CONSP (Vdefault_process_coding_system
))
3732 val
= XCAR (Vdefault_process_coding_system
);
3736 p
->decode_coding_system
= val
;
3740 val
= XCAR (XCDR (tem
));
3744 else if (!NILP (Vcoding_system_for_write
))
3745 val
= Vcoding_system_for_write
;
3746 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3750 if (EQ (coding_systems
, Qt
))
3752 if (NILP (host
) || NILP (service
))
3753 coding_systems
= Qnil
;
3756 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3757 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3758 GCPRO1_VAR (proc
, inner_gcpro
);
3759 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3760 UNGCPRO_VAR (inner_gcpro
);
3763 if (CONSP (coding_systems
))
3764 val
= XCDR (coding_systems
);
3765 else if (CONSP (Vdefault_process_coding_system
))
3766 val
= XCDR (Vdefault_process_coding_system
);
3770 p
->encode_coding_system
= val
;
3772 setup_process_coding_systems (proc
);
3774 p
->decoding_buf
= empty_unibyte_string
;
3775 p
->decoding_carryover
= 0;
3776 p
->encoding_buf
= empty_unibyte_string
;
3778 p
->inherit_coding_system_flag
3779 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3786 #if defined(HAVE_NET_IF_H)
3789 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3790 doc
: /* Return an alist of all network interfaces and their network address.
3791 Each element is a cons, the car of which is a string containing the
3792 interface name, and the cdr is the network address in internal
3793 format; see the description of ADDRESS in `make-network-process'. */)
3796 struct ifconf ifconf
;
3797 struct ifreq
*ifreqs
= NULL
;
3802 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3808 buf_size
= ifaces
* sizeof (ifreqs
[0]);
3809 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3816 ifconf
.ifc_len
= buf_size
;
3817 ifconf
.ifc_req
= ifreqs
;
3818 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3824 if (ifconf
.ifc_len
== buf_size
)
3828 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3831 while (--ifaces
>= 0)
3833 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3834 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3835 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3837 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3838 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3839 res
= Fcons (Fcons (build_string (namebuf
),
3840 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3841 sizeof (struct sockaddr
))),
3847 #endif /* SIOCGIFCONF */
3849 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3853 const char *flag_sym
;
3856 static const struct ifflag_def ifflag_table
[] = {
3860 #ifdef IFF_BROADCAST
3861 { IFF_BROADCAST
, "broadcast" },
3864 { IFF_DEBUG
, "debug" },
3867 { IFF_LOOPBACK
, "loopback" },
3869 #ifdef IFF_POINTOPOINT
3870 { IFF_POINTOPOINT
, "pointopoint" },
3873 { IFF_RUNNING
, "running" },
3876 { IFF_NOARP
, "noarp" },
3879 { IFF_PROMISC
, "promisc" },
3881 #ifdef IFF_NOTRAILERS
3882 { IFF_NOTRAILERS
, "notrailers" },
3885 { IFF_ALLMULTI
, "allmulti" },
3888 { IFF_MASTER
, "master" },
3891 { IFF_SLAVE
, "slave" },
3893 #ifdef IFF_MULTICAST
3894 { IFF_MULTICAST
, "multicast" },
3897 { IFF_PORTSEL
, "portsel" },
3899 #ifdef IFF_AUTOMEDIA
3900 { IFF_AUTOMEDIA
, "automedia" },
3903 { IFF_DYNAMIC
, "dynamic" },
3906 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3909 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3912 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3915 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3918 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3923 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3924 doc
: /* Return information about network interface named IFNAME.
3925 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3926 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3927 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3928 FLAGS is the current flags of the interface. */)
3929 (Lisp_Object ifname
)
3932 Lisp_Object res
= Qnil
;
3937 CHECK_STRING (ifname
);
3939 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3940 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3942 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3947 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3948 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3950 int flags
= rq
.ifr_flags
;
3951 const struct ifflag_def
*fp
;
3955 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3957 if (flags
& fp
->flag_bit
)
3959 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3960 flags
-= fp
->flag_bit
;
3963 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3965 if (flags
& (1 << fnum
))
3967 elt
= Fcons (make_number (fnum
), elt
);
3972 res
= Fcons (elt
, res
);
3975 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3976 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3978 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3979 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3983 for (n
= 0; n
< 6; n
++)
3984 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3985 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3988 res
= Fcons (elt
, res
);
3991 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3992 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3995 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3996 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3998 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4002 res
= Fcons (elt
, res
);
4005 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4006 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4009 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4012 res
= Fcons (elt
, res
);
4015 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
4016 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4019 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4022 res
= Fcons (elt
, res
);
4026 return any
? res
: Qnil
;
4029 #endif /* defined(HAVE_NET_IF_H) */
4031 /* Turn off input and output for process PROC. */
4034 deactivate_process (Lisp_Object proc
)
4036 register int inchannel
, outchannel
;
4037 register struct Lisp_Process
*p
= XPROCESS (proc
);
4039 inchannel
= p
->infd
;
4040 outchannel
= p
->outfd
;
4042 #ifdef ADAPTIVE_READ_BUFFERING
4043 if (p
->read_output_delay
> 0)
4045 if (--process_output_delay_count
< 0)
4046 process_output_delay_count
= 0;
4047 p
->read_output_delay
= 0;
4048 p
->read_output_skip
= 0;
4054 /* Beware SIGCHLD hereabouts. */
4055 flush_pending_output (inchannel
);
4056 emacs_close (inchannel
);
4057 if (outchannel
>= 0 && outchannel
!= inchannel
)
4058 emacs_close (outchannel
);
4062 #ifdef DATAGRAM_SOCKETS
4063 if (DATAGRAM_CHAN_P (inchannel
))
4065 xfree (datagram_address
[inchannel
].sa
);
4066 datagram_address
[inchannel
].sa
= 0;
4067 datagram_address
[inchannel
].len
= 0;
4070 chan_process
[inchannel
] = Qnil
;
4071 FD_CLR (inchannel
, &input_wait_mask
);
4072 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4073 #ifdef NON_BLOCKING_CONNECT
4074 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4076 FD_CLR (inchannel
, &connect_wait_mask
);
4077 FD_CLR (inchannel
, &write_mask
);
4078 if (--num_pending_connects
< 0)
4082 if (inchannel
== max_process_desc
)
4085 /* We just closed the highest-numbered process input descriptor,
4086 so recompute the highest-numbered one now. */
4087 max_process_desc
= 0;
4088 for (i
= 0; i
< MAXDESC
; i
++)
4089 if (!NILP (chan_process
[i
]))
4090 max_process_desc
= i
;
4096 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4098 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4099 It is read into the process' buffers or given to their filter functions.
4100 Non-nil arg PROCESS means do not return until some output has been received
4103 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4104 and milliseconds to wait; return after that much time whether or not
4105 there is any subprocess output. If SECONDS is a floating point number,
4106 it specifies a fractional number of seconds to wait.
4107 The MILLISEC argument is obsolete and should be avoided.
4109 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4110 from PROCESS, suspending reading output from other processes.
4111 If JUST-THIS-ONE is an integer, don't run any timers either.
4112 Return non-nil if we received any output before the timeout expired. */)
4113 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4115 int secs
, usecs
= 0;
4117 if (! NILP (process
))
4118 CHECK_PROCESS (process
);
4120 just_this_one
= Qnil
;
4122 if (!NILP (millisec
))
4123 { /* Obsolete calling convention using integers rather than floats. */
4124 CHECK_NUMBER (millisec
);
4126 seconds
= make_float (XINT (millisec
) / 1000.0);
4129 CHECK_NUMBER (seconds
);
4130 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4134 if (!NILP (seconds
))
4136 if (INTEGERP (seconds
))
4137 secs
= XINT (seconds
);
4138 else if (FLOATP (seconds
))
4140 double timeout
= XFLOAT_DATA (seconds
);
4141 secs
= (int) timeout
;
4142 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
4145 wrong_type_argument (Qnumberp
, seconds
);
4147 if (secs
< 0 || (secs
== 0 && usecs
== 0))
4148 secs
= -1, usecs
= 0;
4151 secs
= NILP (process
) ? -1 : 0;
4154 (wait_reading_process_output (secs
, usecs
, 0, 0,
4156 !NILP (process
) ? XPROCESS (process
) : NULL
,
4157 NILP (just_this_one
) ? 0 :
4158 !INTEGERP (just_this_one
) ? 1 : -1)
4162 /* Accept a connection for server process SERVER on CHANNEL. */
4164 static int connect_counter
= 0;
4167 server_accept_connection (Lisp_Object server
, int channel
)
4169 Lisp_Object proc
, caller
, name
, buffer
;
4170 Lisp_Object contact
, host
, service
;
4171 struct Lisp_Process
*ps
= XPROCESS (server
);
4172 struct Lisp_Process
*p
;
4176 struct sockaddr_in in
;
4178 struct sockaddr_in6 in6
;
4180 #ifdef HAVE_LOCAL_SOCKETS
4181 struct sockaddr_un un
;
4184 socklen_t len
= sizeof saddr
;
4186 s
= accept (channel
, &saddr
.sa
, &len
);
4195 if (code
== EWOULDBLOCK
)
4199 if (!NILP (ps
->log
))
4200 call3 (ps
->log
, server
, Qnil
,
4201 concat3 (build_string ("accept failed with code"),
4202 Fnumber_to_string (make_number (code
)),
4203 build_string ("\n")));
4209 /* Setup a new process to handle the connection. */
4211 /* Generate a unique identification of the caller, and build contact
4212 information for this process. */
4215 switch (saddr
.sa
.sa_family
)
4219 Lisp_Object args
[5];
4220 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4221 args
[0] = build_string ("%d.%d.%d.%d");
4222 args
[1] = make_number (*ip
++);
4223 args
[2] = make_number (*ip
++);
4224 args
[3] = make_number (*ip
++);
4225 args
[4] = make_number (*ip
++);
4226 host
= Fformat (5, args
);
4227 service
= make_number (ntohs (saddr
.in
.sin_port
));
4229 args
[0] = build_string (" <%s:%d>");
4232 caller
= Fformat (3, args
);
4239 Lisp_Object args
[9];
4240 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4242 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4243 for (i
= 0; i
< 8; i
++)
4244 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4245 host
= Fformat (9, args
);
4246 service
= make_number (ntohs (saddr
.in
.sin_port
));
4248 args
[0] = build_string (" <[%s]:%d>");
4251 caller
= Fformat (3, args
);
4256 #ifdef HAVE_LOCAL_SOCKETS
4260 caller
= Fnumber_to_string (make_number (connect_counter
));
4261 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4265 /* Create a new buffer name for this process if it doesn't have a
4266 filter. The new buffer name is based on the buffer name or
4267 process name of the server process concatenated with the caller
4270 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4274 buffer
= ps
->buffer
;
4276 buffer
= Fbuffer_name (buffer
);
4281 buffer
= concat2 (buffer
, caller
);
4282 buffer
= Fget_buffer_create (buffer
);
4286 /* Generate a unique name for the new server process. Combine the
4287 server process name with the caller identification. */
4289 name
= concat2 (ps
->name
, caller
);
4290 proc
= make_process (name
);
4292 chan_process
[s
] = proc
;
4295 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4298 fcntl (s
, F_SETFL
, O_NDELAY
);
4302 p
= XPROCESS (proc
);
4304 /* Build new contact information for this setup. */
4305 contact
= Fcopy_sequence (ps
->childp
);
4306 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4307 contact
= Fplist_put (contact
, QChost
, host
);
4308 if (!NILP (service
))
4309 contact
= Fplist_put (contact
, QCservice
, service
);
4310 contact
= Fplist_put (contact
, QCremote
,
4311 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4312 #ifdef HAVE_GETSOCKNAME
4314 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4315 contact
= Fplist_put (contact
, QClocal
,
4316 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4319 p
->childp
= contact
;
4320 p
->plist
= Fcopy_sequence (ps
->plist
);
4324 p
->sentinel
= ps
->sentinel
;
4325 p
->filter
= ps
->filter
;
4332 /* Client processes for accepted connections are not stopped initially. */
4333 if (!EQ (p
->filter
, Qt
))
4335 FD_SET (s
, &input_wait_mask
);
4336 FD_SET (s
, &non_keyboard_wait_mask
);
4339 if (s
> max_process_desc
)
4340 max_process_desc
= s
;
4342 /* Setup coding system for new process based on server process.
4343 This seems to be the proper thing to do, as the coding system
4344 of the new process should reflect the settings at the time the
4345 server socket was opened; not the current settings. */
4347 p
->decode_coding_system
= ps
->decode_coding_system
;
4348 p
->encode_coding_system
= ps
->encode_coding_system
;
4349 setup_process_coding_systems (proc
);
4351 p
->decoding_buf
= empty_unibyte_string
;
4352 p
->decoding_carryover
= 0;
4353 p
->encoding_buf
= empty_unibyte_string
;
4355 p
->inherit_coding_system_flag
4356 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4358 if (!NILP (ps
->log
))
4359 call3 (ps
->log
, server
, proc
,
4360 concat3 (build_string ("accept from "),
4361 (STRINGP (host
) ? host
: build_string ("-")),
4362 build_string ("\n")));
4364 if (!NILP (p
->sentinel
))
4365 exec_sentinel (proc
,
4366 concat3 (build_string ("open from "),
4367 (STRINGP (host
) ? host
: build_string ("-")),
4368 build_string ("\n")));
4371 /* This variable is different from waiting_for_input in keyboard.c.
4372 It is used to communicate to a lisp process-filter/sentinel (via the
4373 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4374 for user-input when that process-filter was called.
4375 waiting_for_input cannot be used as that is by definition 0 when
4376 lisp code is being evalled.
4377 This is also used in record_asynch_buffer_change.
4378 For that purpose, this must be 0
4379 when not inside wait_reading_process_output. */
4380 static int waiting_for_user_input_p
;
4383 wait_reading_process_output_unwind (Lisp_Object data
)
4385 waiting_for_user_input_p
= XINT (data
);
4389 /* This is here so breakpoints can be put on it. */
4391 wait_reading_process_output_1 (void)
4395 /* Use a wrapper around select to work around a bug in gdb 5.3.
4396 Normally, the wrapper is optimized away by inlining.
4398 If emacs is stopped inside select, the gdb backtrace doesn't
4399 show the function which called select, so it is practically
4400 impossible to step through wait_reading_process_output. */
4404 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4406 return select (n
, rfd
, wfd
, xfd
, tmo
);
4408 #define select select_wrapper
4411 /* Read and dispose of subprocess output while waiting for timeout to
4412 elapse and/or keyboard input to be available.
4415 timeout in seconds, or
4416 zero for no limit, or
4417 -1 means gobble data immediately available but don't wait for any.
4420 an additional duration to wait, measured in microseconds.
4421 If this is nonzero and time_limit is 0, then the timeout
4422 consists of MICROSECS only.
4424 READ_KBD is a lisp value:
4425 0 to ignore keyboard input, or
4426 1 to return when input is available, or
4427 -1 meaning caller will actually read the input, so don't throw to
4428 the quit handler, or
4430 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4431 output that arrives.
4433 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4434 (and gobble terminal input into the buffer if any arrives).
4436 If WAIT_PROC is specified, wait until something arrives from that
4437 process. The return value is true if we read some input from
4440 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4441 (suspending output from other processes). A negative value
4442 means don't run any timers either.
4444 If WAIT_PROC is specified, then the function returns true if we
4445 received input from that process before the timeout elapsed.
4446 Otherwise, return true if we received input from any process. */
4449 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4451 Lisp_Object wait_for_cell
,
4452 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4454 register int channel
, nfds
;
4455 SELECT_TYPE Available
;
4456 SELECT_TYPE Writeok
;
4458 int check_delay
, no_avail
;
4461 EMACS_TIME timeout
, end_time
;
4462 int wait_channel
= -1;
4463 int got_some_input
= 0;
4464 int count
= SPECPDL_INDEX ();
4466 FD_ZERO (&Available
);
4469 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4470 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4471 message ("Blocking call to accept-process-output with quit inhibited!!");
4473 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4474 if (wait_proc
!= NULL
)
4475 wait_channel
= wait_proc
->infd
;
4477 record_unwind_protect (wait_reading_process_output_unwind
,
4478 make_number (waiting_for_user_input_p
));
4479 waiting_for_user_input_p
= read_kbd
;
4481 /* Since we may need to wait several times,
4482 compute the absolute time to return at. */
4483 if (time_limit
|| microsecs
)
4485 EMACS_GET_TIME (end_time
);
4486 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4487 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4492 int timeout_reduced_for_timers
= 0;
4494 /* If calling from keyboard input, do not quit
4495 since we want to return C-g as an input character.
4496 Otherwise, do pending quit if requested. */
4501 process_pending_signals ();
4504 /* Exit now if the cell we're waiting for became non-nil. */
4505 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4508 /* Compute time from now till when time limit is up */
4509 /* Exit if already run out */
4510 if (time_limit
== -1)
4512 /* -1 specified for timeout means
4513 gobble output available now
4514 but don't wait at all. */
4516 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4518 else if (time_limit
|| microsecs
)
4520 EMACS_GET_TIME (timeout
);
4521 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4522 if (EMACS_TIME_NEG_P (timeout
))
4527 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4530 /* Normally we run timers here.
4531 But not if wait_for_cell; in those cases,
4532 the wait is supposed to be short,
4533 and those callers cannot handle running arbitrary Lisp code here. */
4534 if (NILP (wait_for_cell
)
4535 && just_wait_proc
>= 0)
4537 EMACS_TIME timer_delay
;
4541 int old_timers_run
= timers_run
;
4542 struct buffer
*old_buffer
= current_buffer
;
4543 Lisp_Object old_window
= selected_window
;
4545 timer_delay
= timer_check ();
4547 /* If a timer has run, this might have changed buffers
4548 an alike. Make read_key_sequence aware of that. */
4549 if (timers_run
!= old_timers_run
4550 && (old_buffer
!= current_buffer
4551 || !EQ (old_window
, selected_window
))
4552 && waiting_for_user_input_p
== -1)
4553 record_asynch_buffer_change ();
4555 if (timers_run
!= old_timers_run
&& do_display
)
4556 /* We must retry, since a timer may have requeued itself
4557 and that could alter the time_delay. */
4558 redisplay_preserve_echo_area (9);
4562 while (!detect_input_pending ());
4564 /* If there is unread keyboard input, also return. */
4566 && requeued_events_pending_p ())
4569 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4571 EMACS_TIME difference
;
4572 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4573 if (EMACS_TIME_NEG_P (difference
))
4575 timeout
= timer_delay
;
4576 timeout_reduced_for_timers
= 1;
4579 /* If time_limit is -1, we are not going to wait at all. */
4580 else if (time_limit
!= -1)
4582 /* This is so a breakpoint can be put here. */
4583 wait_reading_process_output_1 ();
4587 /* Cause C-g and alarm signals to take immediate action,
4588 and cause input available signals to zero out timeout.
4590 It is important that we do this before checking for process
4591 activity. If we get a SIGCHLD after the explicit checks for
4592 process activity, timeout is the only way we will know. */
4594 set_waiting_for_input (&timeout
);
4596 /* If status of something has changed, and no input is
4597 available, notify the user of the change right away. After
4598 this explicit check, we'll let the SIGCHLD handler zap
4599 timeout to get our attention. */
4600 if (update_tick
!= process_tick
)
4605 if (kbd_on_hold_p ())
4608 Atemp
= input_wait_mask
;
4611 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4612 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4614 #ifdef NON_BLOCKING_CONNECT
4615 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4619 (SELECT_TYPE
*)0, &timeout
)
4622 /* It's okay for us to do this and then continue with
4623 the loop, since timeout has already been zeroed out. */
4624 clear_waiting_for_input ();
4625 status_notify (NULL
);
4626 if (do_display
) redisplay_preserve_echo_area (13);
4630 /* Don't wait for output from a non-running process. Just
4631 read whatever data has already been received. */
4632 if (wait_proc
&& wait_proc
->raw_status_new
)
4633 update_status (wait_proc
);
4635 && ! EQ (wait_proc
->status
, Qrun
)
4636 && ! EQ (wait_proc
->status
, Qconnect
))
4638 int nread
, total_nread
= 0;
4640 clear_waiting_for_input ();
4641 XSETPROCESS (proc
, wait_proc
);
4643 /* Read data from the process, until we exhaust it. */
4644 while (wait_proc
->infd
>= 0)
4646 nread
= read_process_output (proc
, wait_proc
->infd
);
4653 total_nread
+= nread
;
4657 else if (nread
== -1 && EIO
== errno
)
4661 else if (nread
== -1 && EAGAIN
== errno
)
4665 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4669 if (total_nread
> 0 && do_display
)
4670 redisplay_preserve_echo_area (10);
4675 /* Wait till there is something to do */
4677 if (wait_proc
&& just_wait_proc
)
4679 if (wait_proc
->infd
< 0) /* Terminated */
4681 FD_SET (wait_proc
->infd
, &Available
);
4685 else if (!NILP (wait_for_cell
))
4687 Available
= non_process_wait_mask
;
4694 Available
= non_keyboard_wait_mask
;
4696 Available
= input_wait_mask
;
4697 Writeok
= write_mask
;
4698 #ifdef SELECT_CANT_DO_WRITE_MASK
4703 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4706 /* If frame size has changed or the window is newly mapped,
4707 redisplay now, before we start to wait. There is a race
4708 condition here; if a SIGIO arrives between now and the select
4709 and indicates that a frame is trashed, the select may block
4710 displaying a trashed screen. */
4711 if (frame_garbaged
&& do_display
)
4713 clear_waiting_for_input ();
4714 redisplay_preserve_echo_area (11);
4716 set_waiting_for_input (&timeout
);
4720 if (read_kbd
&& detect_input_pending ())
4728 #ifdef ADAPTIVE_READ_BUFFERING
4729 /* Set the timeout for adaptive read buffering if any
4730 process has non-zero read_output_skip and non-zero
4731 read_output_delay, and we are not reading output for a
4732 specific wait_channel. It is not executed if
4733 Vprocess_adaptive_read_buffering is nil. */
4734 if (process_output_skip
&& check_delay
> 0)
4736 int usecs
= EMACS_USECS (timeout
);
4737 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4738 usecs
= READ_OUTPUT_DELAY_MAX
;
4739 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4741 proc
= chan_process
[channel
];
4744 /* Find minimum non-zero read_output_delay among the
4745 processes with non-zero read_output_skip. */
4746 if (XPROCESS (proc
)->read_output_delay
> 0)
4749 if (!XPROCESS (proc
)->read_output_skip
)
4751 FD_CLR (channel
, &Available
);
4752 XPROCESS (proc
)->read_output_skip
= 0;
4753 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4754 usecs
= XPROCESS (proc
)->read_output_delay
;
4757 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4758 process_output_skip
= 0;
4761 #if defined (USE_GTK) || defined (HAVE_GCONF)
4763 #elif defined (HAVE_NS)
4768 (max (max_process_desc
, max_input_desc
) + 1,
4770 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4771 (SELECT_TYPE
*)0, &timeout
);
4776 /* Make C-g and alarm signals set flags again */
4777 clear_waiting_for_input ();
4779 /* If we woke up due to SIGWINCH, actually change size now. */
4780 do_pending_window_change (0);
4782 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4783 /* We wanted the full specified time, so return now. */
4787 if (xerrno
== EINTR
)
4789 else if (xerrno
== EBADF
)
4792 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4793 the child's closure of the pts gives the parent a SIGHUP, and
4794 the ptc file descriptor is automatically closed,
4795 yielding EBADF here or at select() call above.
4796 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4797 in m/ibmrt-aix.h), and here we just ignore the select error.
4798 Cleanup occurs c/o status_notify after SIGCLD. */
4799 no_avail
= 1; /* Cannot depend on values returned */
4805 error ("select error: %s", emacs_strerror (xerrno
));
4810 FD_ZERO (&Available
);
4814 #if 0 /* When polling is used, interrupt_input is 0,
4815 so get_input_pending should read the input.
4816 So this should not be needed. */
4817 /* If we are using polling for input,
4818 and we see input available, make it get read now.
4819 Otherwise it might not actually get read for a second.
4820 And on hpux, since we turn off polling in wait_reading_process_output,
4821 it might never get read at all if we don't spend much time
4822 outside of wait_reading_process_output. */
4823 if (read_kbd
&& interrupt_input
4824 && keyboard_bit_set (&Available
)
4825 && input_polling_used ())
4826 kill (getpid (), SIGALRM
);
4829 /* Check for keyboard input */
4830 /* If there is any, return immediately
4831 to give it higher priority than subprocesses */
4835 int old_timers_run
= timers_run
;
4836 struct buffer
*old_buffer
= current_buffer
;
4837 Lisp_Object old_window
= selected_window
;
4840 if (detect_input_pending_run_timers (do_display
))
4842 swallow_events (do_display
);
4843 if (detect_input_pending_run_timers (do_display
))
4847 /* If a timer has run, this might have changed buffers
4848 an alike. Make read_key_sequence aware of that. */
4849 if (timers_run
!= old_timers_run
4850 && waiting_for_user_input_p
== -1
4851 && (old_buffer
!= current_buffer
4852 || !EQ (old_window
, selected_window
)))
4853 record_asynch_buffer_change ();
4859 /* If there is unread keyboard input, also return. */
4861 && requeued_events_pending_p ())
4864 /* If we are not checking for keyboard input now,
4865 do process events (but don't run any timers).
4866 This is so that X events will be processed.
4867 Otherwise they may have to wait until polling takes place.
4868 That would causes delays in pasting selections, for example.
4870 (We used to do this only if wait_for_cell.) */
4871 if (read_kbd
== 0 && detect_input_pending ())
4873 swallow_events (do_display
);
4874 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4875 if (detect_input_pending ())
4880 /* Exit now if the cell we're waiting for became non-nil. */
4881 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4885 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4886 go read it. This can happen with X on BSD after logging out.
4887 In that case, there really is no input and no SIGIO,
4888 but select says there is input. */
4890 if (read_kbd
&& interrupt_input
4891 && keyboard_bit_set (&Available
) && ! noninteractive
)
4892 kill (getpid (), SIGIO
);
4896 got_some_input
|= nfds
> 0;
4898 /* If checking input just got us a size-change event from X,
4899 obey it now if we should. */
4900 if (read_kbd
|| ! NILP (wait_for_cell
))
4901 do_pending_window_change (0);
4903 /* Check for data from a process. */
4904 if (no_avail
|| nfds
== 0)
4907 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4909 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4910 if (FD_ISSET (channel
, &Available
)
4912 && (d
->condition
& FOR_READ
) != 0)
4913 d
->func (channel
, d
->data
, 1);
4914 if (FD_ISSET (channel
, &write_mask
)
4916 && (d
->condition
& FOR_WRITE
) != 0)
4917 d
->func (channel
, d
->data
, 0);
4920 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4922 if (FD_ISSET (channel
, &Available
)
4923 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4924 && !FD_ISSET (channel
, &non_process_wait_mask
))
4928 /* If waiting for this channel, arrange to return as
4929 soon as no more input to be processed. No more
4931 if (wait_channel
== channel
)
4937 proc
= chan_process
[channel
];
4941 /* If this is a server stream socket, accept connection. */
4942 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4944 server_accept_connection (proc
, channel
);
4948 /* Read data from the process, starting with our
4949 buffered-ahead character if we have one. */
4951 nread
= read_process_output (proc
, channel
);
4954 /* Since read_process_output can run a filter,
4955 which can call accept-process-output,
4956 don't try to read from any other processes
4957 before doing the select again. */
4958 FD_ZERO (&Available
);
4961 redisplay_preserve_echo_area (12);
4964 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4967 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4968 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4970 else if (nread
== -1 && errno
== EAGAIN
)
4974 else if (nread
== -1 && errno
== EAGAIN
)
4976 /* Note that we cannot distinguish between no input
4977 available now and a closed pipe.
4978 With luck, a closed pipe will be accompanied by
4979 subprocess termination and SIGCHLD. */
4980 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4982 #endif /* O_NDELAY */
4983 #endif /* O_NONBLOCK */
4985 /* On some OSs with ptys, when the process on one end of
4986 a pty exits, the other end gets an error reading with
4987 errno = EIO instead of getting an EOF (0 bytes read).
4988 Therefore, if we get an error reading and errno =
4989 EIO, just continue, because the child process has
4990 exited and should clean itself up soon (e.g. when we
4993 However, it has been known to happen that the SIGCHLD
4994 got lost. So raise the signal again just in case.
4996 else if (nread
== -1 && errno
== EIO
)
4998 /* Clear the descriptor now, so we only raise the
4999 signal once. Don't do this if `process' is only
5001 if (XPROCESS (proc
)->pid
!= -2)
5003 FD_CLR (channel
, &input_wait_mask
);
5004 FD_CLR (channel
, &non_keyboard_wait_mask
);
5006 kill (getpid (), SIGCHLD
);
5009 #endif /* HAVE_PTYS */
5010 /* If we can detect process termination, don't consider the process
5011 gone just because its pipe is closed. */
5013 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5018 /* Preserve status of processes already terminated. */
5019 XPROCESS (proc
)->tick
= ++process_tick
;
5020 deactivate_process (proc
);
5021 if (XPROCESS (proc
)->raw_status_new
)
5022 update_status (XPROCESS (proc
));
5023 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5024 XPROCESS (proc
)->status
5025 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5028 #ifdef NON_BLOCKING_CONNECT
5029 if (FD_ISSET (channel
, &Writeok
)
5030 && FD_ISSET (channel
, &connect_wait_mask
))
5032 struct Lisp_Process
*p
;
5034 FD_CLR (channel
, &connect_wait_mask
);
5035 FD_CLR (channel
, &write_mask
);
5036 if (--num_pending_connects
< 0)
5039 proc
= chan_process
[channel
];
5043 p
= XPROCESS (proc
);
5046 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5047 So only use it on systems where it is known to work. */
5049 socklen_t xlen
= sizeof (xerrno
);
5050 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5055 struct sockaddr pname
;
5056 int pnamelen
= sizeof (pname
);
5058 /* If connection failed, getpeername will fail. */
5060 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5062 /* Obtain connect failure code through error slippage. */
5065 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5072 p
->tick
= ++process_tick
;
5073 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
5074 deactivate_process (proc
);
5079 /* Execute the sentinel here. If we had relied on
5080 status_notify to do it later, it will read input
5081 from the process before calling the sentinel. */
5082 exec_sentinel (proc
, build_string ("open\n"));
5083 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5085 FD_SET (p
->infd
, &input_wait_mask
);
5086 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5090 #endif /* NON_BLOCKING_CONNECT */
5091 } /* end for each file descriptor */
5092 } /* end while exit conditions not met */
5094 unbind_to (count
, Qnil
);
5096 /* If calling from keyboard input, do not quit
5097 since we want to return C-g as an input character.
5098 Otherwise, do pending quit if requested. */
5101 /* Prevent input_pending from remaining set if we quit. */
5102 clear_input_pending ();
5106 return got_some_input
;
5109 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5112 read_process_output_call (Lisp_Object fun_and_args
)
5114 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5118 read_process_output_error_handler (Lisp_Object error_val
)
5120 cmd_error_internal (error_val
, "error in process filter: ");
5122 update_echo_area ();
5123 Fsleep_for (make_number (2), Qnil
);
5127 /* Read pending output from the process channel,
5128 starting with our buffered-ahead character if we have one.
5129 Yield number of decoded characters read.
5131 This function reads at most 4096 characters.
5132 If you want to read all available subprocess output,
5133 you must call it repeatedly until it returns zero.
5135 The characters read are decoded according to PROC's coding-system
5139 read_process_output (Lisp_Object proc
, register int channel
)
5141 register int nbytes
;
5143 register Lisp_Object outstream
;
5144 register struct Lisp_Process
*p
= XPROCESS (proc
);
5145 register EMACS_INT opoint
;
5146 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5147 int carryover
= p
->decoding_carryover
;
5149 int count
= SPECPDL_INDEX ();
5150 Lisp_Object odeactivate
;
5152 chars
= (char *) alloca (carryover
+ readmax
);
5154 /* See the comment above. */
5155 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5157 #ifdef DATAGRAM_SOCKETS
5158 /* We have a working select, so proc_buffered_char is always -1. */
5159 if (DATAGRAM_CHAN_P (channel
))
5161 socklen_t len
= datagram_address
[channel
].len
;
5162 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5163 0, datagram_address
[channel
].sa
, &len
);
5167 if (proc_buffered_char
[channel
] < 0)
5170 if (XPROCESS (proc
)->gnutls_p
)
5171 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5172 chars
+ carryover
, readmax
);
5175 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5176 #ifdef ADAPTIVE_READ_BUFFERING
5177 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5179 int delay
= p
->read_output_delay
;
5182 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5185 process_output_delay_count
++;
5186 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5189 else if (delay
> 0 && (nbytes
== readmax
))
5191 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5193 process_output_delay_count
--;
5195 p
->read_output_delay
= delay
;
5198 p
->read_output_skip
= 1;
5199 process_output_skip
= 1;
5206 chars
[carryover
] = proc_buffered_char
[channel
];
5207 proc_buffered_char
[channel
] = -1;
5209 if (XPROCESS (proc
)->gnutls_p
)
5210 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5211 chars
+ carryover
+ 1, readmax
- 1);
5214 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5218 nbytes
= nbytes
+ 1;
5221 p
->decoding_carryover
= 0;
5223 /* At this point, NBYTES holds number of bytes just received
5224 (including the one in proc_buffered_char[channel]). */
5227 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5229 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5232 /* Now set NBYTES how many bytes we must decode. */
5233 nbytes
+= carryover
;
5235 odeactivate
= Vdeactivate_mark
;
5236 /* There's no good reason to let process filters change the current
5237 buffer, and many callers of accept-process-output, sit-for, and
5238 friends don't expect current-buffer to be changed from under them. */
5239 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5241 /* Read and dispose of the process output. */
5242 outstream
= p
->filter
;
5243 if (!NILP (outstream
))
5246 int outer_running_asynch_code
= running_asynch_code
;
5247 int waiting
= waiting_for_user_input_p
;
5249 /* No need to gcpro these, because all we do with them later
5250 is test them for EQness, and none of them should be a string. */
5252 Lisp_Object obuffer
, okeymap
;
5253 XSETBUFFER (obuffer
, current_buffer
);
5254 okeymap
= BVAR (current_buffer
, keymap
);
5257 /* We inhibit quit here instead of just catching it so that
5258 hitting ^G when a filter happens to be running won't screw
5260 specbind (Qinhibit_quit
, Qt
);
5261 specbind (Qlast_nonmenu_event
, Qt
);
5263 /* In case we get recursively called,
5264 and we already saved the match data nonrecursively,
5265 save the same match data in safely recursive fashion. */
5266 if (outer_running_asynch_code
)
5269 /* Don't clobber the CURRENT match data, either! */
5270 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5271 restore_search_regs ();
5272 record_unwind_save_match_data ();
5273 Fset_match_data (tem
, Qt
);
5276 /* For speed, if a search happens within this code,
5277 save the match data in a special nonrecursive fashion. */
5278 running_asynch_code
= 1;
5280 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5281 text
= coding
->dst_object
;
5282 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5283 /* A new coding system might be found. */
5284 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5286 p
->decode_coding_system
= Vlast_coding_system_used
;
5288 /* Don't call setup_coding_system for
5289 proc_decode_coding_system[channel] here. It is done in
5290 detect_coding called via decode_coding above. */
5292 /* If a coding system for encoding is not yet decided, we set
5293 it as the same as coding-system for decoding.
5295 But, before doing that we must check if
5296 proc_encode_coding_system[p->outfd] surely points to a
5297 valid memory because p->outfd will be changed once EOF is
5298 sent to the process. */
5299 if (NILP (p
->encode_coding_system
)
5300 && proc_encode_coding_system
[p
->outfd
])
5302 p
->encode_coding_system
5303 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5304 setup_coding_system (p
->encode_coding_system
,
5305 proc_encode_coding_system
[p
->outfd
]);
5309 if (coding
->carryover_bytes
> 0)
5311 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5312 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5313 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5314 coding
->carryover_bytes
);
5315 p
->decoding_carryover
= coding
->carryover_bytes
;
5317 if (SBYTES (text
) > 0)
5318 internal_condition_case_1 (read_process_output_call
,
5320 Fcons (proc
, Fcons (text
, Qnil
))),
5321 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5322 read_process_output_error_handler
);
5324 /* If we saved the match data nonrecursively, restore it now. */
5325 restore_search_regs ();
5326 running_asynch_code
= outer_running_asynch_code
;
5328 /* Restore waiting_for_user_input_p as it was
5329 when we were called, in case the filter clobbered it. */
5330 waiting_for_user_input_p
= waiting
;
5332 #if 0 /* Call record_asynch_buffer_change unconditionally,
5333 because we might have changed minor modes or other things
5334 that affect key bindings. */
5335 if (! EQ (Fcurrent_buffer (), obuffer
)
5336 || ! EQ (current_buffer
->keymap
, okeymap
))
5338 /* But do it only if the caller is actually going to read events.
5339 Otherwise there's no need to make him wake up, and it could
5340 cause trouble (for example it would make sit_for return). */
5341 if (waiting_for_user_input_p
== -1)
5342 record_asynch_buffer_change ();
5345 /* If no filter, write into buffer if it isn't dead. */
5346 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5348 Lisp_Object old_read_only
;
5349 EMACS_INT old_begv
, old_zv
;
5350 EMACS_INT old_begv_byte
, old_zv_byte
;
5351 EMACS_INT before
, before_byte
;
5352 EMACS_INT opoint_byte
;
5356 Fset_buffer (p
->buffer
);
5358 opoint_byte
= PT_BYTE
;
5359 old_read_only
= BVAR (current_buffer
, read_only
);
5362 old_begv_byte
= BEGV_BYTE
;
5363 old_zv_byte
= ZV_BYTE
;
5365 BVAR (current_buffer
, read_only
) = Qnil
;
5367 /* Insert new output into buffer
5368 at the current end-of-output marker,
5369 thus preserving logical ordering of input and output. */
5370 if (XMARKER (p
->mark
)->buffer
)
5371 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5372 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5375 SET_PT_BOTH (ZV
, ZV_BYTE
);
5377 before_byte
= PT_BYTE
;
5379 /* If the output marker is outside of the visible region, save
5380 the restriction and widen. */
5381 if (! (BEGV
<= PT
&& PT
<= ZV
))
5384 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5385 text
= coding
->dst_object
;
5386 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5387 /* A new coding system might be found. See the comment in the
5388 similar code in the previous `if' block. */
5389 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5391 p
->decode_coding_system
= Vlast_coding_system_used
;
5392 if (NILP (p
->encode_coding_system
)
5393 && proc_encode_coding_system
[p
->outfd
])
5395 p
->encode_coding_system
5396 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5397 setup_coding_system (p
->encode_coding_system
,
5398 proc_encode_coding_system
[p
->outfd
]);
5401 if (coding
->carryover_bytes
> 0)
5403 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5404 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5405 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5406 coding
->carryover_bytes
);
5407 p
->decoding_carryover
= coding
->carryover_bytes
;
5409 /* Adjust the multibyteness of TEXT to that of the buffer. */
5410 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5411 != ! STRING_MULTIBYTE (text
))
5412 text
= (STRING_MULTIBYTE (text
)
5413 ? Fstring_as_unibyte (text
)
5414 : Fstring_to_multibyte (text
));
5415 /* Insert before markers in case we are inserting where
5416 the buffer's mark is, and the user's next command is Meta-y. */
5417 insert_from_string_before_markers (text
, 0, 0,
5418 SCHARS (text
), SBYTES (text
), 0);
5420 /* Make sure the process marker's position is valid when the
5421 process buffer is changed in the signal_after_change above.
5422 W3 is known to do that. */
5423 if (BUFFERP (p
->buffer
)
5424 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5425 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5427 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5429 update_mode_lines
++;
5431 /* Make sure opoint and the old restrictions
5432 float ahead of any new text just as point would. */
5433 if (opoint
>= before
)
5435 opoint
+= PT
- before
;
5436 opoint_byte
+= PT_BYTE
- before_byte
;
5438 if (old_begv
> before
)
5440 old_begv
+= PT
- before
;
5441 old_begv_byte
+= PT_BYTE
- before_byte
;
5443 if (old_zv
>= before
)
5445 old_zv
+= PT
- before
;
5446 old_zv_byte
+= PT_BYTE
- before_byte
;
5449 /* If the restriction isn't what it should be, set it. */
5450 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5451 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5454 BVAR (current_buffer
, read_only
) = old_read_only
;
5455 SET_PT_BOTH (opoint
, opoint_byte
);
5457 /* Handling the process output should not deactivate the mark. */
5458 Vdeactivate_mark
= odeactivate
;
5460 unbind_to (count
, Qnil
);
5464 /* Sending data to subprocess */
5466 jmp_buf send_process_frame
;
5467 Lisp_Object process_sent_to
;
5470 send_process_trap (int ignore
)
5472 SIGNAL_THREAD_CHECK (SIGPIPE
);
5473 sigunblock (sigmask (SIGPIPE
));
5474 longjmp (send_process_frame
, 1);
5477 /* Send some data to process PROC.
5478 BUF is the beginning of the data; LEN is the number of characters.
5479 OBJECT is the Lisp object that the data comes from. If OBJECT is
5480 nil or t, it means that the data comes from C string.
5482 If OBJECT is not nil, the data is encoded by PROC's coding-system
5483 for encoding before it is sent.
5485 This function can evaluate Lisp code and can garbage collect. */
5488 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5489 volatile EMACS_INT len
, volatile Lisp_Object object
)
5491 /* Use volatile to protect variables from being clobbered by longjmp. */
5492 struct Lisp_Process
*p
= XPROCESS (proc
);
5494 struct coding_system
*coding
;
5495 struct gcpro gcpro1
;
5496 void (*volatile old_sigpipe
) (int);
5500 if (p
->raw_status_new
)
5502 if (! EQ (p
->status
, Qrun
))
5503 error ("Process %s not running", SDATA (p
->name
));
5505 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5507 coding
= proc_encode_coding_system
[p
->outfd
];
5508 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5510 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5511 || (BUFFERP (object
)
5512 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5515 p
->encode_coding_system
5516 = complement_process_encoding_system (p
->encode_coding_system
);
5517 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5519 /* The coding system for encoding was changed to raw-text
5520 because we sent a unibyte text previously. Now we are
5521 sending a multibyte text, thus we must encode it by the
5522 original coding system specified for the current process.
5524 Another reason we comming here is that the coding system
5525 was just complemented and new one was returned by
5526 complement_process_encoding_system. */
5527 setup_coding_system (p
->encode_coding_system
, coding
);
5528 Vlast_coding_system_used
= p
->encode_coding_system
;
5530 coding
->src_multibyte
= 1;
5534 /* For sending a unibyte text, character code conversion should
5535 not take place but EOL conversion should. So, setup raw-text
5536 or one of the subsidiary if we have not yet done it. */
5537 if (CODING_REQUIRE_ENCODING (coding
))
5539 if (CODING_REQUIRE_FLUSHING (coding
))
5541 /* But, before changing the coding, we must flush out data. */
5542 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5543 send_process (proc
, "", 0, Qt
);
5544 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5546 setup_coding_system (raw_text_coding_system
5547 (Vlast_coding_system_used
),
5549 coding
->src_multibyte
= 0;
5552 coding
->dst_multibyte
= 0;
5554 if (CODING_REQUIRE_ENCODING (coding
))
5556 coding
->dst_object
= Qt
;
5557 if (BUFFERP (object
))
5559 EMACS_INT from_byte
, from
, to
;
5560 EMACS_INT save_pt
, save_pt_byte
;
5561 struct buffer
*cur
= current_buffer
;
5563 set_buffer_internal (XBUFFER (object
));
5564 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5566 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5567 from
= BYTE_TO_CHAR (from_byte
);
5568 to
= BYTE_TO_CHAR (from_byte
+ len
);
5569 TEMP_SET_PT_BOTH (from
, from_byte
);
5570 encode_coding_object (coding
, object
, from
, from_byte
,
5571 to
, from_byte
+ len
, Qt
);
5572 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5573 set_buffer_internal (cur
);
5575 else if (STRINGP (object
))
5577 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5578 SBYTES (object
), Qt
);
5582 coding
->dst_object
= make_unibyte_string (buf
, len
);
5583 coding
->produced
= len
;
5586 len
= coding
->produced
;
5587 object
= coding
->dst_object
;
5588 buf
= SSDATA (object
);
5591 if (pty_max_bytes
== 0)
5593 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5594 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5595 if (pty_max_bytes
< 0)
5596 pty_max_bytes
= 250;
5598 pty_max_bytes
= 250;
5600 /* Deduct one, to leave space for the eof. */
5604 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5605 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5606 when returning with longjmp despite being declared volatile. */
5607 if (!setjmp (send_process_frame
))
5609 process_sent_to
= proc
;
5612 EMACS_INT
this = len
;
5614 /* Send this batch, using one or more write calls. */
5617 int outfd
= p
->outfd
;
5618 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5619 #ifdef DATAGRAM_SOCKETS
5620 if (DATAGRAM_CHAN_P (outfd
))
5622 rv
= sendto (outfd
, buf
, this,
5623 0, datagram_address
[outfd
].sa
,
5624 datagram_address
[outfd
].len
);
5625 if (rv
< 0 && errno
== EMSGSIZE
)
5627 signal (SIGPIPE
, old_sigpipe
);
5628 report_file_error ("sending datagram",
5629 Fcons (proc
, Qnil
));
5636 if (XPROCESS (proc
)->gnutls_p
)
5637 rv
= emacs_gnutls_write (outfd
,
5642 rv
= emacs_write (outfd
, buf
, this);
5643 #ifdef ADAPTIVE_READ_BUFFERING
5644 if (p
->read_output_delay
> 0
5645 && p
->adaptive_read_buffering
== 1)
5647 p
->read_output_delay
= 0;
5648 process_output_delay_count
--;
5649 p
->read_output_skip
= 0;
5653 signal (SIGPIPE
, old_sigpipe
);
5659 || errno
== EWOULDBLOCK
5665 /* Buffer is full. Wait, accepting input;
5666 that may allow the program
5667 to finish doing output and read more. */
5671 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5672 /* A gross hack to work around a bug in FreeBSD.
5673 In the following sequence, read(2) returns
5677 write(2) 954 bytes, get EAGAIN
5678 read(2) 1024 bytes in process_read_output
5679 read(2) 11 bytes in process_read_output
5681 That is, read(2) returns more bytes than have
5682 ever been written successfully. The 1033 bytes
5683 read are the 1022 bytes written successfully
5684 after processing (for example with CRs added if
5685 the terminal is set up that way which it is
5686 here). The same bytes will be seen again in a
5687 later read(2), without the CRs. */
5689 if (errno
== EAGAIN
)
5692 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5694 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5696 /* Running filters might relocate buffers or strings.
5697 Arrange to relocate BUF. */
5698 if (BUFFERP (object
))
5699 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5700 (unsigned char *) buf
);
5701 else if (STRINGP (object
))
5702 offset
= buf
- SSDATA (object
);
5704 #ifdef EMACS_HAS_USECS
5705 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5707 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5710 if (BUFFERP (object
))
5711 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5713 else if (STRINGP (object
))
5714 buf
= offset
+ SSDATA (object
);
5719 /* This is a real error. */
5720 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5730 signal (SIGPIPE
, old_sigpipe
);
5731 proc
= process_sent_to
;
5732 p
= XPROCESS (proc
);
5733 p
->raw_status_new
= 0;
5734 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5735 p
->tick
= ++process_tick
;
5736 deactivate_process (proc
);
5737 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5743 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5745 doc
: /* Send current contents of region as input to PROCESS.
5746 PROCESS may be a process, a buffer, the name of a process or buffer, or
5747 nil, indicating the current buffer's process.
5748 Called from program, takes three arguments, PROCESS, START and END.
5749 If the region is more than 500 characters long,
5750 it is sent in several bunches. This may happen even for shorter regions.
5751 Output from processes can arrive in between bunches. */)
5752 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5755 EMACS_INT start1
, end1
;
5757 proc
= get_process (process
);
5758 validate_region (&start
, &end
);
5760 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5761 move_gap (XINT (start
));
5763 start1
= CHAR_TO_BYTE (XINT (start
));
5764 end1
= CHAR_TO_BYTE (XINT (end
));
5765 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5766 Fcurrent_buffer ());
5771 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5773 doc
: /* Send PROCESS the contents of STRING as input.
5774 PROCESS may be a process, a buffer, the name of a process or buffer, or
5775 nil, indicating the current buffer's process.
5776 If STRING is more than 500 characters long,
5777 it is sent in several bunches. This may happen even for shorter strings.
5778 Output from processes can arrive in between bunches. */)
5779 (Lisp_Object process
, Lisp_Object string
)
5782 CHECK_STRING (string
);
5783 proc
= get_process (process
);
5784 send_process (proc
, SSDATA (string
),
5785 SBYTES (string
), string
);
5789 /* Return the foreground process group for the tty/pty that
5790 the process P uses. */
5792 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5797 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5800 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5801 master side. Try the slave side. */
5802 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5806 ioctl (fd
, TIOCGPGRP
, &gid
);
5810 #endif /* defined (TIOCGPGRP ) */
5815 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5816 Sprocess_running_child_p
, 0, 1, 0,
5817 doc
: /* Return t if PROCESS has given the terminal to a child.
5818 If the operating system does not make it possible to find out,
5819 return t unconditionally. */)
5820 (Lisp_Object process
)
5822 /* Initialize in case ioctl doesn't exist or gives an error,
5823 in a way that will cause returning t. */
5826 struct Lisp_Process
*p
;
5828 proc
= get_process (process
);
5829 p
= XPROCESS (proc
);
5831 if (!EQ (p
->type
, Qreal
))
5832 error ("Process %s is not a subprocess",
5835 error ("Process %s is not active",
5838 gid
= emacs_get_tty_pgrp (p
);
5845 /* send a signal number SIGNO to PROCESS.
5846 If CURRENT_GROUP is t, that means send to the process group
5847 that currently owns the terminal being used to communicate with PROCESS.
5848 This is used for various commands in shell mode.
5849 If CURRENT_GROUP is lambda, that means send to the process group
5850 that currently owns the terminal, but only if it is NOT the shell itself.
5852 If NOMSG is zero, insert signal-announcements into process's buffers
5855 If we can, we try to signal PROCESS by sending control characters
5856 down the pty. This allows us to signal inferiors who have changed
5857 their uid, for which killpg would return an EPERM error. */
5860 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5864 register struct Lisp_Process
*p
;
5868 proc
= get_process (process
);
5869 p
= XPROCESS (proc
);
5871 if (!EQ (p
->type
, Qreal
))
5872 error ("Process %s is not a subprocess",
5875 error ("Process %s is not active",
5879 current_group
= Qnil
;
5881 /* If we are using pgrps, get a pgrp number and make it negative. */
5882 if (NILP (current_group
))
5883 /* Send the signal to the shell's process group. */
5887 #ifdef SIGNALS_VIA_CHARACTERS
5888 /* If possible, send signals to the entire pgrp
5889 by sending an input character to it. */
5892 cc_t
*sig_char
= NULL
;
5894 tcgetattr (p
->infd
, &t
);
5899 sig_char
= &t
.c_cc
[VINTR
];
5903 sig_char
= &t
.c_cc
[VQUIT
];
5907 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5908 sig_char
= &t
.c_cc
[VSWTCH
];
5910 sig_char
= &t
.c_cc
[VSUSP
];
5915 if (sig_char
&& *sig_char
!= CDISABLE
)
5917 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5920 /* If we can't send the signal with a character,
5921 fall through and send it another way. */
5923 /* The code above may fall through if it can't
5924 handle the signal. */
5925 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5928 /* Get the current pgrp using the tty itself, if we have that.
5929 Otherwise, use the pty to get the pgrp.
5930 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5931 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5932 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5933 His patch indicates that if TIOCGPGRP returns an error, then
5934 we should just assume that p->pid is also the process group id. */
5936 gid
= emacs_get_tty_pgrp (p
);
5939 /* If we can't get the information, assume
5940 the shell owns the tty. */
5943 /* It is not clear whether anything really can set GID to -1.
5944 Perhaps on some system one of those ioctls can or could do so.
5945 Or perhaps this is vestigial. */
5948 #else /* ! defined (TIOCGPGRP ) */
5949 /* Can't select pgrps on this system, so we know that
5950 the child itself heads the pgrp. */
5952 #endif /* ! defined (TIOCGPGRP ) */
5954 /* If current_group is lambda, and the shell owns the terminal,
5955 don't send any signal. */
5956 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5964 p
->raw_status_new
= 0;
5966 p
->tick
= ++process_tick
;
5969 status_notify (NULL
);
5970 redisplay_preserve_echo_area (13);
5973 #endif /* ! defined (SIGCONT) */
5977 flush_pending_output (p
->infd
);
5981 /* If we don't have process groups, send the signal to the immediate
5982 subprocess. That isn't really right, but it's better than any
5983 obvious alternative. */
5986 kill (p
->pid
, signo
);
5990 /* gid may be a pid, or minus a pgrp's number */
5992 if (!NILP (current_group
))
5994 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5995 EMACS_KILLPG (gid
, signo
);
6002 #else /* ! defined (TIOCSIGSEND) */
6003 EMACS_KILLPG (gid
, signo
);
6004 #endif /* ! defined (TIOCSIGSEND) */
6007 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6008 doc
: /* Interrupt process PROCESS.
6009 PROCESS may be a process, a buffer, or the name of a process or buffer.
6010 No arg or nil means current buffer's process.
6011 Second arg CURRENT-GROUP non-nil means send signal to
6012 the current process-group of the process's controlling terminal
6013 rather than to the process's own process group.
6014 If the process is a shell, this means interrupt current subjob
6015 rather than the shell.
6017 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6018 don't send the signal. */)
6019 (Lisp_Object process
, Lisp_Object current_group
)
6021 process_send_signal (process
, SIGINT
, current_group
, 0);
6025 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6026 doc
: /* Kill process PROCESS. May be process or name of one.
6027 See function `interrupt-process' for more details on usage. */)
6028 (Lisp_Object process
, Lisp_Object current_group
)
6030 process_send_signal (process
, SIGKILL
, current_group
, 0);
6034 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6035 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6036 See function `interrupt-process' for more details on usage. */)
6037 (Lisp_Object process
, Lisp_Object current_group
)
6039 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6043 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6044 doc
: /* Stop process PROCESS. May be process or name of one.
6045 See function `interrupt-process' for more details on usage.
6046 If PROCESS is a network or serial process, inhibit handling of incoming
6048 (Lisp_Object process
, Lisp_Object current_group
)
6050 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6052 struct Lisp_Process
*p
;
6054 p
= XPROCESS (process
);
6055 if (NILP (p
->command
)
6058 FD_CLR (p
->infd
, &input_wait_mask
);
6059 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6065 error ("No SIGTSTP support");
6067 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6072 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6073 doc
: /* Continue process PROCESS. May be process or name of one.
6074 See function `interrupt-process' for more details on usage.
6075 If PROCESS is a network or serial process, resume handling of incoming
6077 (Lisp_Object process
, Lisp_Object current_group
)
6079 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6081 struct Lisp_Process
*p
;
6083 p
= XPROCESS (process
);
6084 if (EQ (p
->command
, Qt
)
6086 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6088 FD_SET (p
->infd
, &input_wait_mask
);
6089 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6091 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6092 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6093 #else /* not WINDOWSNT */
6094 tcflush (p
->infd
, TCIFLUSH
);
6095 #endif /* not WINDOWSNT */
6101 process_send_signal (process
, SIGCONT
, current_group
, 0);
6103 error ("No SIGCONT support");
6108 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6109 2, 2, "sProcess (name or number): \nnSignal code: ",
6110 doc
: /* Send PROCESS the signal with code SIGCODE.
6111 PROCESS may also be a number specifying the process id of the
6112 process to signal; in this case, the process need not be a child of
6114 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6115 (Lisp_Object process
, Lisp_Object sigcode
)
6119 if (INTEGERP (process
))
6121 pid
= XINT (process
);
6125 if (FLOATP (process
))
6127 pid
= (pid_t
) XFLOAT_DATA (process
);
6131 if (STRINGP (process
))
6134 if (tem
= Fget_process (process
), NILP (tem
))
6136 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6143 process
= get_process (process
);
6148 CHECK_PROCESS (process
);
6149 pid
= XPROCESS (process
)->pid
;
6151 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6155 #define parse_signal(NAME, VALUE) \
6156 else if (!xstrcasecmp (name, NAME)) \
6157 XSETINT (sigcode, VALUE)
6159 if (INTEGERP (sigcode
))
6165 CHECK_SYMBOL (sigcode
);
6166 name
= SSDATA (SYMBOL_NAME (sigcode
));
6168 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6174 parse_signal ("usr1", SIGUSR1
);
6177 parse_signal ("usr2", SIGUSR2
);
6180 parse_signal ("term", SIGTERM
);
6183 parse_signal ("hup", SIGHUP
);
6186 parse_signal ("int", SIGINT
);
6189 parse_signal ("quit", SIGQUIT
);
6192 parse_signal ("ill", SIGILL
);
6195 parse_signal ("abrt", SIGABRT
);
6198 parse_signal ("emt", SIGEMT
);
6201 parse_signal ("kill", SIGKILL
);
6204 parse_signal ("fpe", SIGFPE
);
6207 parse_signal ("bus", SIGBUS
);
6210 parse_signal ("segv", SIGSEGV
);
6213 parse_signal ("sys", SIGSYS
);
6216 parse_signal ("pipe", SIGPIPE
);
6219 parse_signal ("alrm", SIGALRM
);
6222 parse_signal ("urg", SIGURG
);
6225 parse_signal ("stop", SIGSTOP
);
6228 parse_signal ("tstp", SIGTSTP
);
6231 parse_signal ("cont", SIGCONT
);
6234 parse_signal ("chld", SIGCHLD
);
6237 parse_signal ("ttin", SIGTTIN
);
6240 parse_signal ("ttou", SIGTTOU
);
6243 parse_signal ("io", SIGIO
);
6246 parse_signal ("xcpu", SIGXCPU
);
6249 parse_signal ("xfsz", SIGXFSZ
);
6252 parse_signal ("vtalrm", SIGVTALRM
);
6255 parse_signal ("prof", SIGPROF
);
6258 parse_signal ("winch", SIGWINCH
);
6261 parse_signal ("info", SIGINFO
);
6264 error ("Undefined signal name %s", name
);
6269 return make_number (kill (pid
, XINT (sigcode
)));
6272 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6273 doc
: /* Make PROCESS see end-of-file in its input.
6274 EOF comes after any text already sent to it.
6275 PROCESS may be a process, a buffer, the name of a process or buffer, or
6276 nil, indicating the current buffer's process.
6277 If PROCESS is a network connection, or is a process communicating
6278 through a pipe (as opposed to a pty), then you cannot send any more
6279 text to PROCESS after you call this function.
6280 If PROCESS is a serial process, wait until all output written to the
6281 process has been transmitted to the serial port. */)
6282 (Lisp_Object process
)
6285 struct coding_system
*coding
;
6287 if (DATAGRAM_CONN_P (process
))
6290 proc
= get_process (process
);
6291 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6293 /* Make sure the process is really alive. */
6294 if (XPROCESS (proc
)->raw_status_new
)
6295 update_status (XPROCESS (proc
));
6296 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6297 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6299 if (CODING_REQUIRE_FLUSHING (coding
))
6301 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6302 send_process (proc
, "", 0, Qnil
);
6305 if (XPROCESS (proc
)->pty_flag
)
6306 send_process (proc
, "\004", 1, Qnil
);
6307 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6310 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6311 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6312 #endif /* not WINDOWSNT */
6313 /* Do nothing on Windows because writes are blocking. */
6317 int old_outfd
, new_outfd
;
6319 #ifdef HAVE_SHUTDOWN
6320 /* If this is a network connection, or socketpair is used
6321 for communication with the subprocess, call shutdown to cause EOF.
6322 (In some old system, shutdown to socketpair doesn't work.
6323 Then we just can't win.) */
6324 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6325 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6326 shutdown (XPROCESS (proc
)->outfd
, 1);
6327 /* In case of socketpair, outfd == infd, so don't close it. */
6328 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6329 emacs_close (XPROCESS (proc
)->outfd
);
6330 #else /* not HAVE_SHUTDOWN */
6331 emacs_close (XPROCESS (proc
)->outfd
);
6332 #endif /* not HAVE_SHUTDOWN */
6333 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6336 old_outfd
= XPROCESS (proc
)->outfd
;
6338 if (!proc_encode_coding_system
[new_outfd
])
6339 proc_encode_coding_system
[new_outfd
]
6340 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6341 memcpy (proc_encode_coding_system
[new_outfd
],
6342 proc_encode_coding_system
[old_outfd
],
6343 sizeof (struct coding_system
));
6344 memset (proc_encode_coding_system
[old_outfd
], 0,
6345 sizeof (struct coding_system
));
6347 XPROCESS (proc
)->outfd
= new_outfd
;
6352 /* On receipt of a signal that a child status has changed, loop asking
6353 about children with changed statuses until the system says there
6356 All we do is change the status; we do not run sentinels or print
6357 notifications. That is saved for the next time keyboard input is
6358 done, in order to avoid timing errors.
6360 ** WARNING: this can be called during garbage collection.
6361 Therefore, it must not be fooled by the presence of mark bits in
6364 ** USG WARNING: Although it is not obvious from the documentation
6365 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6366 signal() before executing at least one wait(), otherwise the
6367 handler will be called again, resulting in an infinite loop. The
6368 relevant portion of the documentation reads "SIGCLD signals will be
6369 queued and the signal-catching function will be continually
6370 reentered until the queue is empty". Invoking signal() causes the
6371 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6374 ** Malloc WARNING: This should never call malloc either directly or
6375 indirectly; if it does, that is a bug */
6379 sigchld_handler (int signo
)
6381 int old_errno
= errno
;
6383 struct Lisp_Process
*p
;
6385 SIGNAL_THREAD_CHECK (signo
);
6396 #endif /* no WUNTRACED */
6397 /* Keep trying to get a status until we get a definitive result. */
6401 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6403 while (pid
< 0 && errno
== EINTR
);
6407 /* PID == 0 means no processes found, PID == -1 means a real
6408 failure. We have done all our job, so return. */
6415 #endif /* no WNOHANG */
6417 /* Find the process that signaled us, and record its status. */
6419 /* The process can have been deleted by Fdelete_process. */
6420 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6422 Lisp_Object xpid
= XCAR (tail
);
6423 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6424 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6426 XSETCAR (tail
, Qnil
);
6427 goto sigchld_end_of_loop
;
6431 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6433 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6435 proc
= XCDR (XCAR (tail
));
6436 p
= XPROCESS (proc
);
6437 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6442 /* Look for an asynchronous process whose pid hasn't been filled
6445 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6447 proc
= XCDR (XCAR (tail
));
6448 p
= XPROCESS (proc
);
6454 /* Change the status of the process that was found. */
6457 int clear_desc_flag
= 0;
6459 p
->tick
= ++process_tick
;
6461 p
->raw_status_new
= 1;
6463 /* If process has terminated, stop waiting for its output. */
6464 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6466 clear_desc_flag
= 1;
6468 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6469 if (clear_desc_flag
)
6471 FD_CLR (p
->infd
, &input_wait_mask
);
6472 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6475 /* Tell wait_reading_process_output that it needs to wake up and
6477 if (input_available_clear_time
)
6478 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6481 /* There was no asynchronous process found for that pid: we have
6482 a synchronous process. */
6485 synch_process_alive
= 0;
6487 /* Report the status of the synchronous process. */
6489 synch_process_retcode
= WRETCODE (w
);
6490 else if (WIFSIGNALED (w
))
6491 synch_process_termsig
= WTERMSIG (w
);
6493 /* Tell wait_reading_process_output that it needs to wake up and
6495 if (input_available_clear_time
)
6496 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6499 sigchld_end_of_loop
:
6502 /* On some systems, we must return right away.
6503 If any more processes want to signal us, we will
6505 Otherwise (on systems that have WNOHANG), loop around
6506 to use up all the processes that have something to tell us. */
6507 #if (defined WINDOWSNT \
6508 || (defined USG && !defined GNU_LINUX \
6509 && !(defined HPUX && defined WNOHANG)))
6512 #endif /* USG, but not HPUX with WNOHANG */
6515 #endif /* SIGCHLD */
6519 exec_sentinel_unwind (Lisp_Object data
)
6521 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6526 exec_sentinel_error_handler (Lisp_Object error_val
)
6528 cmd_error_internal (error_val
, "error in process sentinel: ");
6530 update_echo_area ();
6531 Fsleep_for (make_number (2), Qnil
);
6536 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6538 Lisp_Object sentinel
, odeactivate
;
6539 register struct Lisp_Process
*p
= XPROCESS (proc
);
6540 int count
= SPECPDL_INDEX ();
6541 int outer_running_asynch_code
= running_asynch_code
;
6542 int waiting
= waiting_for_user_input_p
;
6544 if (inhibit_sentinels
)
6547 /* No need to gcpro these, because all we do with them later
6548 is test them for EQness, and none of them should be a string. */
6549 odeactivate
= Vdeactivate_mark
;
6551 Lisp_Object obuffer
, okeymap
;
6552 XSETBUFFER (obuffer
, current_buffer
);
6553 okeymap
= BVAR (current_buffer
, keymap
);
6556 /* There's no good reason to let sentinels change the current
6557 buffer, and many callers of accept-process-output, sit-for, and
6558 friends don't expect current-buffer to be changed from under them. */
6559 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6561 sentinel
= p
->sentinel
;
6562 if (NILP (sentinel
))
6565 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6566 assure that it gets restored no matter how the sentinel exits. */
6568 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6569 /* Inhibit quit so that random quits don't screw up a running filter. */
6570 specbind (Qinhibit_quit
, Qt
);
6571 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6573 /* In case we get recursively called,
6574 and we already saved the match data nonrecursively,
6575 save the same match data in safely recursive fashion. */
6576 if (outer_running_asynch_code
)
6579 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6580 restore_search_regs ();
6581 record_unwind_save_match_data ();
6582 Fset_match_data (tem
, Qt
);
6585 /* For speed, if a search happens within this code,
6586 save the match data in a special nonrecursive fashion. */
6587 running_asynch_code
= 1;
6589 internal_condition_case_1 (read_process_output_call
,
6591 Fcons (proc
, Fcons (reason
, Qnil
))),
6592 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6593 exec_sentinel_error_handler
);
6595 /* If we saved the match data nonrecursively, restore it now. */
6596 restore_search_regs ();
6597 running_asynch_code
= outer_running_asynch_code
;
6599 Vdeactivate_mark
= odeactivate
;
6601 /* Restore waiting_for_user_input_p as it was
6602 when we were called, in case the filter clobbered it. */
6603 waiting_for_user_input_p
= waiting
;
6606 if (! EQ (Fcurrent_buffer (), obuffer
)
6607 || ! EQ (current_buffer
->keymap
, okeymap
))
6609 /* But do it only if the caller is actually going to read events.
6610 Otherwise there's no need to make him wake up, and it could
6611 cause trouble (for example it would make sit_for return). */
6612 if (waiting_for_user_input_p
== -1)
6613 record_asynch_buffer_change ();
6615 unbind_to (count
, Qnil
);
6618 /* Report all recent events of a change in process status
6619 (either run the sentinel or output a message).
6620 This is usually done while Emacs is waiting for keyboard input
6621 but can be done at other times. */
6624 status_notify (struct Lisp_Process
*deleting_process
)
6626 register Lisp_Object proc
, buffer
;
6627 Lisp_Object tail
, msg
;
6628 struct gcpro gcpro1
, gcpro2
;
6632 /* We need to gcpro tail; if read_process_output calls a filter
6633 which deletes a process and removes the cons to which tail points
6634 from Vprocess_alist, and then causes a GC, tail is an unprotected
6638 /* Set this now, so that if new processes are created by sentinels
6639 that we run, we get called again to handle their status changes. */
6640 update_tick
= process_tick
;
6642 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6645 register struct Lisp_Process
*p
;
6647 proc
= Fcdr (XCAR (tail
));
6648 p
= XPROCESS (proc
);
6650 if (p
->tick
!= p
->update_tick
)
6652 p
->update_tick
= p
->tick
;
6654 /* If process is still active, read any output that remains. */
6655 while (! EQ (p
->filter
, Qt
)
6656 && ! EQ (p
->status
, Qconnect
)
6657 && ! EQ (p
->status
, Qlisten
)
6658 /* Network or serial process not stopped: */
6659 && ! EQ (p
->command
, Qt
)
6661 && p
!= deleting_process
6662 && read_process_output (proc
, p
->infd
) > 0);
6666 /* Get the text to use for the message. */
6667 if (p
->raw_status_new
)
6669 msg
= status_message (p
);
6671 /* If process is terminated, deactivate it or delete it. */
6673 if (CONSP (p
->status
))
6674 symbol
= XCAR (p
->status
);
6676 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6677 || EQ (symbol
, Qclosed
))
6679 if (delete_exited_processes
)
6680 remove_process (proc
);
6682 deactivate_process (proc
);
6685 /* The actions above may have further incremented p->tick.
6686 So set p->update_tick again
6687 so that an error in the sentinel will not cause
6688 this code to be run again. */
6689 p
->update_tick
= p
->tick
;
6690 /* Now output the message suitably. */
6691 if (!NILP (p
->sentinel
))
6692 exec_sentinel (proc
, msg
);
6693 /* Don't bother with a message in the buffer
6694 when a process becomes runnable. */
6695 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6698 struct buffer
*old
= current_buffer
;
6699 EMACS_INT opoint
, opoint_byte
;
6700 EMACS_INT before
, before_byte
;
6702 /* Avoid error if buffer is deleted
6703 (probably that's why the process is dead, too) */
6704 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6706 Fset_buffer (buffer
);
6709 opoint_byte
= PT_BYTE
;
6710 /* Insert new output into buffer
6711 at the current end-of-output marker,
6712 thus preserving logical ordering of input and output. */
6713 if (XMARKER (p
->mark
)->buffer
)
6714 Fgoto_char (p
->mark
);
6716 SET_PT_BOTH (ZV
, ZV_BYTE
);
6719 before_byte
= PT_BYTE
;
6721 tem
= BVAR (current_buffer
, read_only
);
6722 BVAR (current_buffer
, read_only
) = Qnil
;
6723 insert_string ("\nProcess ");
6724 Finsert (1, &p
->name
);
6725 insert_string (" ");
6727 BVAR (current_buffer
, read_only
) = tem
;
6728 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6730 if (opoint
>= before
)
6731 SET_PT_BOTH (opoint
+ (PT
- before
),
6732 opoint_byte
+ (PT_BYTE
- before_byte
));
6734 SET_PT_BOTH (opoint
, opoint_byte
);
6736 set_buffer_internal (old
);
6741 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6746 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6747 Sset_process_coding_system
, 1, 3, 0,
6748 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6749 DECODING will be used to decode subprocess output and ENCODING to
6750 encode subprocess input. */)
6751 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6753 register struct Lisp_Process
*p
;
6755 CHECK_PROCESS (process
);
6756 p
= XPROCESS (process
);
6758 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6760 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6761 Fcheck_coding_system (decoding
);
6762 Fcheck_coding_system (encoding
);
6763 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6764 p
->decode_coding_system
= decoding
;
6765 p
->encode_coding_system
= encoding
;
6766 setup_process_coding_systems (process
);
6771 DEFUN ("process-coding-system",
6772 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6773 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6774 (register Lisp_Object process
)
6776 CHECK_PROCESS (process
);
6777 return Fcons (XPROCESS (process
)->decode_coding_system
,
6778 XPROCESS (process
)->encode_coding_system
);
6781 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6782 Sset_process_filter_multibyte
, 2, 2, 0,
6783 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6784 If FLAG is non-nil, the filter is given multibyte strings.
6785 If FLAG is nil, the filter is given unibyte strings. In this case,
6786 all character code conversion except for end-of-line conversion is
6788 (Lisp_Object process
, Lisp_Object flag
)
6790 register struct Lisp_Process
*p
;
6792 CHECK_PROCESS (process
);
6793 p
= XPROCESS (process
);
6795 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6796 setup_process_coding_systems (process
);
6801 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6802 Sprocess_filter_multibyte_p
, 1, 1, 0,
6803 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6804 (Lisp_Object process
)
6806 register struct Lisp_Process
*p
;
6807 struct coding_system
*coding
;
6809 CHECK_PROCESS (process
);
6810 p
= XPROCESS (process
);
6811 coding
= proc_decode_coding_system
[p
->infd
];
6812 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6819 add_gpm_wait_descriptor (int desc
)
6821 add_keyboard_wait_descriptor (desc
);
6825 delete_gpm_wait_descriptor (int desc
)
6827 delete_keyboard_wait_descriptor (desc
);
6830 /* Return nonzero if *MASK has a bit set
6831 that corresponds to one of the keyboard input descriptors. */
6834 keyboard_bit_set (fd_set
*mask
)
6838 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6839 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6840 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6846 #else /* not subprocesses */
6848 /* Defined on msdos.c. */
6849 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6852 /* Implementation of wait_reading_process_output, assuming that there
6853 are no subprocesses. Used only by the MS-DOS build.
6855 Wait for timeout to elapse and/or keyboard input to be available.
6858 timeout in seconds, or
6859 zero for no limit, or
6860 -1 means gobble data immediately available but don't wait for any.
6862 read_kbd is a Lisp_Object:
6863 0 to ignore keyboard input, or
6864 1 to return when input is available, or
6865 -1 means caller will actually read the input, so don't throw to
6868 see full version for other parameters. We know that wait_proc will
6869 always be NULL, since `subprocesses' isn't defined.
6871 do_display != 0 means redisplay should be done to show subprocess
6872 output that arrives.
6874 Return true if we received input from any process. */
6877 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6879 Lisp_Object wait_for_cell
,
6880 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6883 EMACS_TIME end_time
, timeout
;
6884 SELECT_TYPE waitchannels
;
6887 /* What does time_limit really mean? */
6888 if (time_limit
|| microsecs
)
6890 EMACS_GET_TIME (end_time
);
6891 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6892 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6895 /* Turn off periodic alarms (in case they are in use)
6896 and then turn off any other atimers,
6897 because the select emulator uses alarms. */
6899 turn_on_atimers (0);
6903 int timeout_reduced_for_timers
= 0;
6905 /* If calling from keyboard input, do not quit
6906 since we want to return C-g as an input character.
6907 Otherwise, do pending quit if requested. */
6911 /* Exit now if the cell we're waiting for became non-nil. */
6912 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6915 /* Compute time from now till when time limit is up */
6916 /* Exit if already run out */
6917 if (time_limit
== -1)
6919 /* -1 specified for timeout means
6920 gobble output available now
6921 but don't wait at all. */
6923 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6925 else if (time_limit
|| microsecs
)
6927 EMACS_GET_TIME (timeout
);
6928 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6929 if (EMACS_TIME_NEG_P (timeout
))
6934 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6937 /* If our caller will not immediately handle keyboard events,
6938 run timer events directly.
6939 (Callers that will immediately read keyboard events
6940 call timer_delay on their own.) */
6941 if (NILP (wait_for_cell
))
6943 EMACS_TIME timer_delay
;
6947 int old_timers_run
= timers_run
;
6948 timer_delay
= timer_check ();
6949 if (timers_run
!= old_timers_run
&& do_display
)
6950 /* We must retry, since a timer may have requeued itself
6951 and that could alter the time delay. */
6952 redisplay_preserve_echo_area (14);
6956 while (!detect_input_pending ());
6958 /* If there is unread keyboard input, also return. */
6960 && requeued_events_pending_p ())
6963 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6965 EMACS_TIME difference
;
6966 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6967 if (EMACS_TIME_NEG_P (difference
))
6969 timeout
= timer_delay
;
6970 timeout_reduced_for_timers
= 1;
6975 /* Cause C-g and alarm signals to take immediate action,
6976 and cause input available signals to zero out timeout. */
6978 set_waiting_for_input (&timeout
);
6980 /* Wait till there is something to do. */
6982 if (! read_kbd
&& NILP (wait_for_cell
))
6983 FD_ZERO (&waitchannels
);
6985 FD_SET (0, &waitchannels
);
6987 /* If a frame has been newly mapped and needs updating,
6988 reprocess its display stuff. */
6989 if (frame_garbaged
&& do_display
)
6991 clear_waiting_for_input ();
6992 redisplay_preserve_echo_area (15);
6994 set_waiting_for_input (&timeout
);
6997 if (read_kbd
&& detect_input_pending ())
7000 FD_ZERO (&waitchannels
);
7003 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7008 /* Make C-g and alarm signals set flags again */
7009 clear_waiting_for_input ();
7011 /* If we woke up due to SIGWINCH, actually change size now. */
7012 do_pending_window_change (0);
7014 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7015 /* We waited the full specified time, so return now. */
7020 /* If the system call was interrupted, then go around the
7022 if (xerrno
== EINTR
)
7023 FD_ZERO (&waitchannels
);
7025 error ("select error: %s", emacs_strerror (xerrno
));
7028 /* Check for keyboard input */
7031 && detect_input_pending_run_timers (do_display
))
7033 swallow_events (do_display
);
7034 if (detect_input_pending_run_timers (do_display
))
7038 /* If there is unread keyboard input, also return. */
7040 && requeued_events_pending_p ())
7043 /* If wait_for_cell. check for keyboard input
7044 but don't run any timers.
7045 ??? (It seems wrong to me to check for keyboard
7046 input at all when wait_for_cell, but the code
7047 has been this way since July 1994.
7048 Try changing this after version 19.31.) */
7049 if (! NILP (wait_for_cell
)
7050 && detect_input_pending ())
7052 swallow_events (do_display
);
7053 if (detect_input_pending ())
7057 /* Exit now if the cell we're waiting for became non-nil. */
7058 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7067 #endif /* not subprocesses */
7069 /* The following functions are needed even if async subprocesses are
7070 not supported. Some of them are no-op stubs in that case. */
7072 /* Add DESC to the set of keyboard input descriptors. */
7075 add_keyboard_wait_descriptor (int desc
)
7077 #ifdef subprocesses /* actually means "not MSDOS" */
7078 FD_SET (desc
, &input_wait_mask
);
7079 FD_SET (desc
, &non_process_wait_mask
);
7080 if (desc
> max_input_desc
)
7081 max_input_desc
= desc
;
7085 /* From now on, do not expect DESC to give keyboard input. */
7088 delete_keyboard_wait_descriptor (int desc
)
7092 int lim
= max_input_desc
;
7094 FD_CLR (desc
, &input_wait_mask
);
7095 FD_CLR (desc
, &non_process_wait_mask
);
7097 if (desc
== max_input_desc
)
7098 for (fd
= 0; fd
< lim
; fd
++)
7099 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7100 max_input_desc
= fd
;
7104 /* Setup coding systems of PROCESS. */
7107 setup_process_coding_systems (Lisp_Object process
)
7110 struct Lisp_Process
*p
= XPROCESS (process
);
7112 int outch
= p
->outfd
;
7113 Lisp_Object coding_system
;
7115 if (inch
< 0 || outch
< 0)
7118 if (!proc_decode_coding_system
[inch
])
7119 proc_decode_coding_system
[inch
]
7120 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7121 coding_system
= p
->decode_coding_system
;
7122 if (! NILP (p
->filter
))
7124 else if (BUFFERP (p
->buffer
))
7126 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7127 coding_system
= raw_text_coding_system (coding_system
);
7129 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7131 if (!proc_encode_coding_system
[outch
])
7132 proc_encode_coding_system
[outch
]
7133 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7134 setup_coding_system (p
->encode_coding_system
,
7135 proc_encode_coding_system
[outch
]);
7139 /* Close all descriptors currently in use for communication
7140 with subprocess. This is used in a newly-forked subprocess
7141 to get rid of irrelevant descriptors. */
7144 close_process_descs (void)
7148 for (i
= 0; i
< MAXDESC
; i
++)
7150 Lisp_Object process
;
7151 process
= chan_process
[i
];
7152 if (!NILP (process
))
7154 int in
= XPROCESS (process
)->infd
;
7155 int out
= XPROCESS (process
)->outfd
;
7158 if (out
>= 0 && in
!= out
)
7165 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7166 doc
: /* Return the (or a) process associated with BUFFER.
7167 BUFFER may be a buffer or the name of one. */)
7168 (register Lisp_Object buffer
)
7171 register Lisp_Object buf
, tail
, proc
;
7173 if (NILP (buffer
)) return Qnil
;
7174 buf
= Fget_buffer (buffer
);
7175 if (NILP (buf
)) return Qnil
;
7177 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7179 proc
= Fcdr (XCAR (tail
));
7180 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7183 #endif /* subprocesses */
7187 DEFUN ("process-inherit-coding-system-flag",
7188 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7190 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7191 If this flag is t, `buffer-file-coding-system' of the buffer
7192 associated with PROCESS will inherit the coding system used to decode
7193 the process output. */)
7194 (register Lisp_Object process
)
7197 CHECK_PROCESS (process
);
7198 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7200 /* Ignore the argument and return the value of
7201 inherit-process-coding-system. */
7202 return inherit_process_coding_system
? Qt
: Qnil
;
7206 /* Kill all processes associated with `buffer'.
7207 If `buffer' is nil, kill all processes */
7210 kill_buffer_processes (Lisp_Object buffer
)
7213 Lisp_Object tail
, proc
;
7215 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7217 proc
= XCDR (XCAR (tail
));
7219 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7221 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7222 Fdelete_process (proc
);
7223 else if (XPROCESS (proc
)->infd
>= 0)
7224 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7227 #else /* subprocesses */
7228 /* Since we have no subprocesses, this does nothing. */
7229 #endif /* subprocesses */
7232 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
7234 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7235 This is intended for use by asynchronous process output filters and sentinels. */)
7239 return (waiting_for_user_input_p
? Qt
: Qnil
);
7245 /* Stop reading input from keyboard sources. */
7248 hold_keyboard_input (void)
7253 /* Resume reading input from keyboard sources. */
7256 unhold_keyboard_input (void)
7261 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7264 kbd_on_hold_p (void)
7266 return kbd_is_on_hold
;
7270 /* Enumeration of and access to system processes a-la ps(1). */
7272 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7274 doc
: /* Return a list of numerical process IDs of all running processes.
7275 If this functionality is unsupported, return nil.
7277 See `process-attributes' for getting attributes of a process given its ID. */)
7280 return list_system_processes ();
7283 DEFUN ("process-attributes", Fprocess_attributes
,
7284 Sprocess_attributes
, 1, 1, 0,
7285 doc
: /* Return attributes of the process given by its PID, a number.
7287 Value is an alist where each element is a cons cell of the form
7291 If this functionality is unsupported, the value is nil.
7293 See `list-system-processes' for getting a list of all process IDs.
7295 The KEYs of the attributes that this function may return are listed
7296 below, together with the type of the associated VALUE (in parentheses).
7297 Not all platforms support all of these attributes; unsupported
7298 attributes will not appear in the returned alist.
7299 Unless explicitly indicated otherwise, numbers can have either
7300 integer or floating point values.
7302 euid -- Effective user User ID of the process (number)
7303 user -- User name corresponding to euid (string)
7304 egid -- Effective user Group ID of the process (number)
7305 group -- Group name corresponding to egid (string)
7306 comm -- Command name (executable name only) (string)
7307 state -- Process state code, such as "S", "R", or "T" (string)
7308 ppid -- Parent process ID (number)
7309 pgrp -- Process group ID (number)
7310 sess -- Session ID, i.e. process ID of session leader (number)
7311 ttname -- Controlling tty name (string)
7312 tpgid -- ID of foreground process group on the process's tty (number)
7313 minflt -- number of minor page faults (number)
7314 majflt -- number of major page faults (number)
7315 cminflt -- cumulative number of minor page faults (number)
7316 cmajflt -- cumulative number of major page faults (number)
7317 utime -- user time used by the process, in the (HIGH LOW USEC) format
7318 stime -- system time used by the process, in the (HIGH LOW USEC) format
7319 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7320 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7321 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7322 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7323 pri -- priority of the process (number)
7324 nice -- nice value of the process (number)
7325 thcount -- process thread count (number)
7326 start -- time the process started, in the (HIGH LOW USEC) format
7327 vsize -- virtual memory size of the process in KB's (number)
7328 rss -- resident set size of the process in KB's (number)
7329 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7330 pcpu -- percents of CPU time used by the process (floating-point number)
7331 pmem -- percents of total physical memory used by process's resident set
7332 (floating-point number)
7333 args -- command line which invoked the process (string). */)
7336 return system_process_attributes (pid
);
7346 inhibit_sentinels
= 0;
7350 if (! noninteractive
|| initialized
)
7352 signal (SIGCHLD
, sigchld_handler
);
7355 FD_ZERO (&input_wait_mask
);
7356 FD_ZERO (&non_keyboard_wait_mask
);
7357 FD_ZERO (&non_process_wait_mask
);
7358 FD_ZERO (&write_mask
);
7359 max_process_desc
= 0;
7360 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7362 #ifdef NON_BLOCKING_CONNECT
7363 FD_ZERO (&connect_wait_mask
);
7364 num_pending_connects
= 0;
7367 #ifdef ADAPTIVE_READ_BUFFERING
7368 process_output_delay_count
= 0;
7369 process_output_skip
= 0;
7372 /* Don't do this, it caused infinite select loops. The display
7373 method should call add_keyboard_wait_descriptor on stdin if it
7376 FD_SET (0, &input_wait_mask
);
7379 Vprocess_alist
= Qnil
;
7381 deleted_pid_list
= Qnil
;
7383 for (i
= 0; i
< MAXDESC
; i
++)
7385 chan_process
[i
] = Qnil
;
7386 proc_buffered_char
[i
] = -1;
7388 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7389 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7390 #ifdef DATAGRAM_SOCKETS
7391 memset (datagram_address
, 0, sizeof datagram_address
);
7395 Lisp_Object subfeatures
= Qnil
;
7396 const struct socket_options
*sopt
;
7398 #define ADD_SUBFEATURE(key, val) \
7399 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7401 #ifdef NON_BLOCKING_CONNECT
7402 ADD_SUBFEATURE (QCnowait
, Qt
);
7404 #ifdef DATAGRAM_SOCKETS
7405 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7407 #ifdef HAVE_SEQPACKET
7408 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7410 #ifdef HAVE_LOCAL_SOCKETS
7411 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7413 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7415 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7417 #ifdef HAVE_GETSOCKNAME
7418 ADD_SUBFEATURE (QCservice
, Qt
);
7420 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7421 ADD_SUBFEATURE (QCserver
, Qt
);
7424 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7425 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7427 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7430 #if defined (DARWIN_OS)
7431 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7432 processes. As such, we only change the default value. */
7435 const char *release
= get_operating_system_release ();
7436 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7437 && release
[1] == '.')) {
7438 Vprocess_connection_type
= Qnil
;
7442 #endif /* subprocesses */
7447 syms_of_process (void)
7451 Qprocessp
= intern_c_string ("processp");
7452 staticpro (&Qprocessp
);
7453 Qrun
= intern_c_string ("run");
7455 Qstop
= intern_c_string ("stop");
7457 Qsignal
= intern_c_string ("signal");
7458 staticpro (&Qsignal
);
7460 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7463 Qexit = intern_c_string ("exit");
7464 staticpro (&Qexit); */
7466 Qopen
= intern_c_string ("open");
7468 Qclosed
= intern_c_string ("closed");
7469 staticpro (&Qclosed
);
7470 Qconnect
= intern_c_string ("connect");
7471 staticpro (&Qconnect
);
7472 Qfailed
= intern_c_string ("failed");
7473 staticpro (&Qfailed
);
7474 Qlisten
= intern_c_string ("listen");
7475 staticpro (&Qlisten
);
7476 Qlocal
= intern_c_string ("local");
7477 staticpro (&Qlocal
);
7478 Qipv4
= intern_c_string ("ipv4");
7481 Qipv6
= intern_c_string ("ipv6");
7484 Qdatagram
= intern_c_string ("datagram");
7485 staticpro (&Qdatagram
);
7486 Qseqpacket
= intern_c_string ("seqpacket");
7487 staticpro (&Qseqpacket
);
7489 QCport
= intern_c_string (":port");
7490 staticpro (&QCport
);
7491 QCspeed
= intern_c_string (":speed");
7492 staticpro (&QCspeed
);
7493 QCprocess
= intern_c_string (":process");
7494 staticpro (&QCprocess
);
7496 QCbytesize
= intern_c_string (":bytesize");
7497 staticpro (&QCbytesize
);
7498 QCstopbits
= intern_c_string (":stopbits");
7499 staticpro (&QCstopbits
);
7500 QCparity
= intern_c_string (":parity");
7501 staticpro (&QCparity
);
7502 Qodd
= intern_c_string ("odd");
7504 Qeven
= intern_c_string ("even");
7506 QCflowcontrol
= intern_c_string (":flowcontrol");
7507 staticpro (&QCflowcontrol
);
7508 Qhw
= intern_c_string ("hw");
7510 Qsw
= intern_c_string ("sw");
7512 QCsummary
= intern_c_string (":summary");
7513 staticpro (&QCsummary
);
7515 Qreal
= intern_c_string ("real");
7517 Qnetwork
= intern_c_string ("network");
7518 staticpro (&Qnetwork
);
7519 Qserial
= intern_c_string ("serial");
7520 staticpro (&Qserial
);
7521 QCbuffer
= intern_c_string (":buffer");
7522 staticpro (&QCbuffer
);
7523 QChost
= intern_c_string (":host");
7524 staticpro (&QChost
);
7525 QCservice
= intern_c_string (":service");
7526 staticpro (&QCservice
);
7527 QClocal
= intern_c_string (":local");
7528 staticpro (&QClocal
);
7529 QCremote
= intern_c_string (":remote");
7530 staticpro (&QCremote
);
7531 QCcoding
= intern_c_string (":coding");
7532 staticpro (&QCcoding
);
7533 QCserver
= intern_c_string (":server");
7534 staticpro (&QCserver
);
7535 QCnowait
= intern_c_string (":nowait");
7536 staticpro (&QCnowait
);
7537 QCsentinel
= intern_c_string (":sentinel");
7538 staticpro (&QCsentinel
);
7539 QClog
= intern_c_string (":log");
7541 QCnoquery
= intern_c_string (":noquery");
7542 staticpro (&QCnoquery
);
7543 QCstop
= intern_c_string (":stop");
7544 staticpro (&QCstop
);
7545 QCoptions
= intern_c_string (":options");
7546 staticpro (&QCoptions
);
7547 QCplist
= intern_c_string (":plist");
7548 staticpro (&QCplist
);
7550 Qlast_nonmenu_event
= intern_c_string ("last-nonmenu-event");
7551 staticpro (&Qlast_nonmenu_event
);
7553 staticpro (&Vprocess_alist
);
7555 staticpro (&deleted_pid_list
);
7558 #endif /* subprocesses */
7560 QCname
= intern_c_string (":name");
7561 staticpro (&QCname
);
7562 QCtype
= intern_c_string (":type");
7563 staticpro (&QCtype
);
7565 Qeuid
= intern_c_string ("euid");
7567 Qegid
= intern_c_string ("egid");
7569 Quser
= intern_c_string ("user");
7571 Qgroup
= intern_c_string ("group");
7572 staticpro (&Qgroup
);
7573 Qcomm
= intern_c_string ("comm");
7575 Qstate
= intern_c_string ("state");
7576 staticpro (&Qstate
);
7577 Qppid
= intern_c_string ("ppid");
7579 Qpgrp
= intern_c_string ("pgrp");
7581 Qsess
= intern_c_string ("sess");
7583 Qttname
= intern_c_string ("ttname");
7584 staticpro (&Qttname
);
7585 Qtpgid
= intern_c_string ("tpgid");
7586 staticpro (&Qtpgid
);
7587 Qminflt
= intern_c_string ("minflt");
7588 staticpro (&Qminflt
);
7589 Qmajflt
= intern_c_string ("majflt");
7590 staticpro (&Qmajflt
);
7591 Qcminflt
= intern_c_string ("cminflt");
7592 staticpro (&Qcminflt
);
7593 Qcmajflt
= intern_c_string ("cmajflt");
7594 staticpro (&Qcmajflt
);
7595 Qutime
= intern_c_string ("utime");
7596 staticpro (&Qutime
);
7597 Qstime
= intern_c_string ("stime");
7598 staticpro (&Qstime
);
7599 Qtime
= intern_c_string ("time");
7601 Qcutime
= intern_c_string ("cutime");
7602 staticpro (&Qcutime
);
7603 Qcstime
= intern_c_string ("cstime");
7604 staticpro (&Qcstime
);
7605 Qctime
= intern_c_string ("ctime");
7606 staticpro (&Qctime
);
7607 Qpri
= intern_c_string ("pri");
7609 Qnice
= intern_c_string ("nice");
7611 Qthcount
= intern_c_string ("thcount");
7612 staticpro (&Qthcount
);
7613 Qstart
= intern_c_string ("start");
7614 staticpro (&Qstart
);
7615 Qvsize
= intern_c_string ("vsize");
7616 staticpro (&Qvsize
);
7617 Qrss
= intern_c_string ("rss");
7619 Qetime
= intern_c_string ("etime");
7620 staticpro (&Qetime
);
7621 Qpcpu
= intern_c_string ("pcpu");
7623 Qpmem
= intern_c_string ("pmem");
7625 Qargs
= intern_c_string ("args");
7628 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7629 doc
: /* *Non-nil means delete processes immediately when they exit.
7630 A value of nil means don't delete them until `list-processes' is run. */);
7632 delete_exited_processes
= 1;
7635 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7636 doc
: /* Control type of device used to communicate with subprocesses.
7637 Values are nil to use a pipe, or t or `pty' to use a pty.
7638 The value has no effect if the system has no ptys or if all ptys are busy:
7639 then a pipe is used in any case.
7640 The value takes effect when `start-process' is called. */);
7641 Vprocess_connection_type
= Qt
;
7643 #ifdef ADAPTIVE_READ_BUFFERING
7644 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7645 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7646 On some systems, when Emacs reads the output from a subprocess, the output data
7647 is read in very small blocks, potentially resulting in very poor performance.
7648 This behavior can be remedied to some extent by setting this variable to a
7649 non-nil value, as it will automatically delay reading from such processes, to
7650 allow them to produce more output before Emacs tries to read it.
7651 If the value is t, the delay is reset after each write to the process; any other
7652 non-nil value means that the delay is not reset on write.
7653 The variable takes effect when `start-process' is called. */);
7654 Vprocess_adaptive_read_buffering
= Qt
;
7657 defsubr (&Sprocessp
);
7658 defsubr (&Sget_process
);
7659 defsubr (&Sdelete_process
);
7660 defsubr (&Sprocess_status
);
7661 defsubr (&Sprocess_exit_status
);
7662 defsubr (&Sprocess_id
);
7663 defsubr (&Sprocess_name
);
7664 defsubr (&Sprocess_tty_name
);
7665 defsubr (&Sprocess_command
);
7666 defsubr (&Sset_process_buffer
);
7667 defsubr (&Sprocess_buffer
);
7668 defsubr (&Sprocess_mark
);
7669 defsubr (&Sset_process_filter
);
7670 defsubr (&Sprocess_filter
);
7671 defsubr (&Sset_process_sentinel
);
7672 defsubr (&Sprocess_sentinel
);
7673 defsubr (&Sset_process_window_size
);
7674 defsubr (&Sset_process_inherit_coding_system_flag
);
7675 defsubr (&Sset_process_query_on_exit_flag
);
7676 defsubr (&Sprocess_query_on_exit_flag
);
7677 defsubr (&Sprocess_contact
);
7678 defsubr (&Sprocess_plist
);
7679 defsubr (&Sset_process_plist
);
7680 defsubr (&Slist_processes
);
7681 defsubr (&Sprocess_list
);
7682 defsubr (&Sstart_process
);
7683 defsubr (&Sserial_process_configure
);
7684 defsubr (&Smake_serial_process
);
7685 defsubr (&Sset_network_process_option
);
7686 defsubr (&Smake_network_process
);
7687 defsubr (&Sformat_network_address
);
7688 #if defined(HAVE_NET_IF_H)
7690 defsubr (&Snetwork_interface_list
);
7692 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7693 defsubr (&Snetwork_interface_info
);
7695 #endif /* defined(HAVE_NET_IF_H) */
7696 #ifdef DATAGRAM_SOCKETS
7697 defsubr (&Sprocess_datagram_address
);
7698 defsubr (&Sset_process_datagram_address
);
7700 defsubr (&Saccept_process_output
);
7701 defsubr (&Sprocess_send_region
);
7702 defsubr (&Sprocess_send_string
);
7703 defsubr (&Sinterrupt_process
);
7704 defsubr (&Skill_process
);
7705 defsubr (&Squit_process
);
7706 defsubr (&Sstop_process
);
7707 defsubr (&Scontinue_process
);
7708 defsubr (&Sprocess_running_child_p
);
7709 defsubr (&Sprocess_send_eof
);
7710 defsubr (&Ssignal_process
);
7711 defsubr (&Swaiting_for_user_input_p
);
7712 defsubr (&Sprocess_type
);
7713 defsubr (&Sset_process_coding_system
);
7714 defsubr (&Sprocess_coding_system
);
7715 defsubr (&Sset_process_filter_multibyte
);
7716 defsubr (&Sprocess_filter_multibyte_p
);
7718 #endif /* subprocesses */
7720 defsubr (&Sget_buffer_process
);
7721 defsubr (&Sprocess_inherit_coding_system_flag
);
7722 defsubr (&Slist_system_processes
);
7723 defsubr (&Sprocess_attributes
);