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
;
2151 inchannel
= outchannel
= -1;
2154 if (!NILP (Vprocess_connection_type
))
2155 outchannel
= inchannel
= allocate_pty ();
2159 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
2160 /* On most USG systems it does not work to open the pty's tty here,
2161 then close it and reopen it in the child. */
2163 /* Don't let this terminal become our controlling terminal
2164 (in case we don't have one). */
2165 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2167 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
2170 report_file_error ("Opening pty", Qnil
);
2171 #if defined (DONT_REOPEN_PTY)
2172 /* In the case that vfork is defined as fork, the parent process
2173 (Emacs) may send some data before the child process completes
2174 tty options setup. So we setup tty before forking. */
2175 child_setup_tty (forkout
);
2176 #endif /* DONT_REOPEN_PTY */
2177 #endif /* not USG, or USG_SUBTTY_WORKS */
2180 #endif /* HAVE_PTYS */
2183 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2184 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2187 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2188 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2192 /* Record this as an active process, with its channels.
2193 As a result, child_setup will close Emacs's side of the pipes. */
2194 chan_process
[inchannel
] = process
;
2195 XPROCESS (process
)->infd
= inchannel
;
2196 XPROCESS (process
)->outfd
= outchannel
;
2198 /* Previously we recorded the tty descriptor used in the subprocess.
2199 It was only used for getting the foreground tty process, so now
2200 we just reopen the device (see emacs_get_tty_pgrp) as this is
2201 more portable (see USG_SUBTTY_WORKS above). */
2203 XPROCESS (process
)->pty_flag
= pty_flag
;
2204 XPROCESS (process
)->status
= Qrun
;
2205 setup_process_coding_systems (process
);
2207 FD_SET (inchannel
, &input_wait_mask
);
2208 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2209 if (inchannel
> max_process_desc
)
2210 max_process_desc
= inchannel
;
2212 XPROCESS (process
)->pid
= -2;
2215 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2218 XPROCESS (process
)->tty_name
= Qnil
;
2222 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2223 The address family of sa is not included in the result. */
2226 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2228 Lisp_Object address
;
2231 register struct Lisp_Vector
*p
;
2233 /* Workaround for a bug in getsockname on BSD: Names bound to
2234 sockets in the UNIX domain are inaccessible; getsockname returns
2235 a zero length name. */
2236 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2237 return empty_unibyte_string
;
2239 switch (sa
->sa_family
)
2243 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2244 len
= sizeof (sin
->sin_addr
) + 1;
2245 address
= Fmake_vector (make_number (len
), Qnil
);
2246 p
= XVECTOR (address
);
2247 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2248 cp
= (unsigned char *) &sin
->sin_addr
;
2254 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2255 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2256 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2257 address
= Fmake_vector (make_number (len
), Qnil
);
2258 p
= XVECTOR (address
);
2259 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2260 for (i
= 0; i
< len
; i
++)
2261 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2265 #ifdef HAVE_LOCAL_SOCKETS
2268 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2269 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2270 if (sockun
->sun_path
[i
] == 0)
2272 return make_unibyte_string (sockun
->sun_path
, i
);
2276 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2277 address
= Fcons (make_number (sa
->sa_family
),
2278 Fmake_vector (make_number (len
), Qnil
));
2279 p
= XVECTOR (XCDR (address
));
2280 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2286 p
->contents
[i
++] = make_number (*cp
++);
2292 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2295 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2297 register struct Lisp_Vector
*p
;
2299 if (VECTORP (address
))
2301 p
= XVECTOR (address
);
2305 return sizeof (struct sockaddr_in
);
2308 else if (p
->size
== 9)
2310 *familyp
= AF_INET6
;
2311 return sizeof (struct sockaddr_in6
);
2315 #ifdef HAVE_LOCAL_SOCKETS
2316 else if (STRINGP (address
))
2318 *familyp
= AF_LOCAL
;
2319 return sizeof (struct sockaddr_un
);
2322 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2324 struct sockaddr
*sa
;
2325 *familyp
= XINT (XCAR (address
));
2326 p
= XVECTOR (XCDR (address
));
2327 return p
->size
+ sizeof (sa
->sa_family
);
2332 /* Convert an address object (vector or string) to an internal sockaddr.
2334 The address format has been basically validated by
2335 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2336 it could have come from user data. So if FAMILY is not valid,
2337 we return after zeroing *SA. */
2340 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2342 register struct Lisp_Vector
*p
;
2343 register unsigned char *cp
= NULL
;
2346 memset (sa
, 0, len
);
2348 if (VECTORP (address
))
2350 p
= XVECTOR (address
);
2351 if (family
== AF_INET
)
2353 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2354 len
= sizeof (sin
->sin_addr
) + 1;
2355 i
= XINT (p
->contents
[--len
]);
2356 sin
->sin_port
= htons (i
);
2357 cp
= (unsigned char *)&sin
->sin_addr
;
2358 sa
->sa_family
= family
;
2361 else if (family
== AF_INET6
)
2363 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2364 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2365 len
= sizeof (sin6
->sin6_addr
) + 1;
2366 i
= XINT (p
->contents
[--len
]);
2367 sin6
->sin6_port
= htons (i
);
2368 for (i
= 0; i
< len
; i
++)
2369 if (INTEGERP (p
->contents
[i
]))
2371 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2374 sa
->sa_family
= family
;
2381 else if (STRINGP (address
))
2383 #ifdef HAVE_LOCAL_SOCKETS
2384 if (family
== AF_LOCAL
)
2386 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2387 cp
= SDATA (address
);
2388 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2389 sockun
->sun_path
[i
] = *cp
++;
2390 sa
->sa_family
= family
;
2397 p
= XVECTOR (XCDR (address
));
2398 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2401 for (i
= 0; i
< len
; i
++)
2402 if (INTEGERP (p
->contents
[i
]))
2403 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2406 #ifdef DATAGRAM_SOCKETS
2407 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2409 doc
: /* Get the current datagram address associated with PROCESS. */)
2410 (Lisp_Object process
)
2414 CHECK_PROCESS (process
);
2416 if (!DATAGRAM_CONN_P (process
))
2419 channel
= XPROCESS (process
)->infd
;
2420 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2421 datagram_address
[channel
].len
);
2424 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2426 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2427 Returns nil upon error setting address, ADDRESS otherwise. */)
2428 (Lisp_Object process
, Lisp_Object address
)
2433 CHECK_PROCESS (process
);
2435 if (!DATAGRAM_CONN_P (process
))
2438 channel
= XPROCESS (process
)->infd
;
2440 len
= get_lisp_to_sockaddr_size (address
, &family
);
2441 if (datagram_address
[channel
].len
!= len
)
2443 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2449 static const struct socket_options
{
2450 /* The name of this option. Should be lowercase version of option
2451 name without SO_ prefix. */
2453 /* Option level SOL_... */
2455 /* Option number SO_... */
2457 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2458 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2459 } socket_options
[] =
2461 #ifdef SO_BINDTODEVICE
2462 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2465 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2468 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2471 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2474 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2477 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2480 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2483 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2485 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2488 /* Set option OPT to value VAL on socket S.
2490 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2491 Signals an error if setting a known option fails.
2495 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2498 const struct socket_options
*sopt
;
2503 name
= SSDATA (SYMBOL_NAME (opt
));
2504 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2505 if (strcmp (name
, sopt
->name
) == 0)
2508 switch (sopt
->opttype
)
2513 optval
= NILP (val
) ? 0 : 1;
2514 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2515 &optval
, sizeof (optval
));
2523 optval
= XINT (val
);
2525 error ("Bad option value for %s", name
);
2526 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2527 &optval
, sizeof (optval
));
2531 #ifdef SO_BINDTODEVICE
2534 char devname
[IFNAMSIZ
+1];
2536 /* This is broken, at least in the Linux 2.4 kernel.
2537 To unbind, the arg must be a zero integer, not the empty string.
2538 This should work on all systems. KFS. 2003-09-23. */
2539 memset (devname
, 0, sizeof devname
);
2542 char *arg
= SSDATA (val
);
2543 int len
= min (strlen (arg
), IFNAMSIZ
);
2544 memcpy (devname
, arg
, len
);
2546 else if (!NILP (val
))
2547 error ("Bad option value for %s", name
);
2548 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2557 struct linger linger
;
2560 linger
.l_linger
= 0;
2562 linger
.l_linger
= XINT (val
);
2564 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2565 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2566 &linger
, sizeof (linger
));
2576 report_file_error ("Cannot set network option",
2577 Fcons (opt
, Fcons (val
, Qnil
)));
2578 return (1 << sopt
->optbit
);
2582 DEFUN ("set-network-process-option",
2583 Fset_network_process_option
, Sset_network_process_option
,
2585 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2586 See `make-network-process' for a list of options and values.
2587 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2588 OPTION is not a supported option, return nil instead; otherwise return t. */)
2589 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2592 struct Lisp_Process
*p
;
2594 CHECK_PROCESS (process
);
2595 p
= XPROCESS (process
);
2596 if (!NETCONN1_P (p
))
2597 error ("Process is not a network process");
2601 error ("Process is not running");
2603 if (set_socket_option (s
, option
, value
))
2605 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2609 if (NILP (no_error
))
2610 error ("Unknown or unsupported option");
2616 DEFUN ("serial-process-configure",
2617 Fserial_process_configure
,
2618 Sserial_process_configure
,
2620 doc
: /* Configure speed, bytesize, etc. of a serial process.
2622 Arguments are specified as keyword/argument pairs. Attributes that
2623 are not given are re-initialized from the process's current
2624 configuration (available via the function `process-contact') or set to
2625 reasonable default values. The following arguments are defined:
2631 -- Any of these arguments can be given to identify the process that is
2632 to be configured. If none of these arguments is given, the current
2633 buffer's process is used.
2635 :speed SPEED -- SPEED is the speed of the serial port in bits per
2636 second, also called baud rate. Any value can be given for SPEED, but
2637 most serial ports work only at a few defined values between 1200 and
2638 115200, with 9600 being the most common value. If SPEED is nil, the
2639 serial port is not configured any further, i.e., all other arguments
2640 are ignored. This may be useful for special serial ports such as
2641 Bluetooth-to-serial converters which can only be configured through AT
2642 commands. A value of nil for SPEED can be used only when passed
2643 through `make-serial-process' or `serial-term'.
2645 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2646 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2648 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2649 `odd' (use odd parity), or the symbol `even' (use even parity). If
2650 PARITY is not given, no parity is used.
2652 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2653 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2654 is not given or nil, 1 stopbit is used.
2656 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2657 flowcontrol to be used, which is either nil (don't use flowcontrol),
2658 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2659 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2660 flowcontrol is used.
2662 `serial-process-configure' is called by `make-serial-process' for the
2663 initial configuration of the serial port.
2667 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2669 \(serial-process-configure
2670 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2672 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2674 usage: (serial-process-configure &rest ARGS) */)
2675 (size_t nargs
, Lisp_Object
*args
)
2677 struct Lisp_Process
*p
;
2678 Lisp_Object contact
= Qnil
;
2679 Lisp_Object proc
= Qnil
;
2680 struct gcpro gcpro1
;
2682 contact
= Flist (nargs
, args
);
2685 proc
= Fplist_get (contact
, QCprocess
);
2687 proc
= Fplist_get (contact
, QCname
);
2689 proc
= Fplist_get (contact
, QCbuffer
);
2691 proc
= Fplist_get (contact
, QCport
);
2692 proc
= get_process (proc
);
2693 p
= XPROCESS (proc
);
2694 if (!EQ (p
->type
, Qserial
))
2695 error ("Not a serial process");
2697 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2703 serial_configure (p
, contact
);
2709 /* Used by make-serial-process to recover from errors. */
2711 make_serial_process_unwind (Lisp_Object proc
)
2713 if (!PROCESSP (proc
))
2715 remove_process (proc
);
2719 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2721 doc
: /* Create and return a serial port process.
2723 In Emacs, serial port connections are represented by process objects,
2724 so input and output work as for subprocesses, and `delete-process'
2725 closes a serial port connection. However, a serial process has no
2726 process id, it cannot be signaled, and the status codes are different
2727 from normal processes.
2729 `make-serial-process' creates a process and a buffer, on which you
2730 probably want to use `process-send-string'. Try \\[serial-term] for
2731 an interactive terminal. See below for examples.
2733 Arguments are specified as keyword/argument pairs. The following
2734 arguments are defined:
2736 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2737 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2738 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2739 the backslashes in strings).
2741 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2742 which is called by `make-serial-process'.
2744 :name NAME -- NAME is the name of the process. If NAME is not given,
2745 the value of PORT is used.
2747 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2748 with the process. Process output goes at the end of that buffer,
2749 unless you specify an output stream or filter function to handle the
2750 output. If BUFFER is not given, the value of NAME is used.
2752 :coding CODING -- If CODING is a symbol, it specifies the coding
2753 system used for both reading and writing for this process. If CODING
2754 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2755 ENCODING is used for writing.
2757 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2758 the process is running. If BOOL is not given, query before exiting.
2760 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2761 In the stopped state, a serial process does not accept incoming data,
2762 but you can send outgoing data. The stopped state is cleared by
2763 `continue-process' and set by `stop-process'.
2765 :filter FILTER -- Install FILTER as the process filter.
2767 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2769 :plist PLIST -- Install PLIST as the initial plist of the process.
2776 -- These arguments are handled by `serial-process-configure', which is
2777 called by `make-serial-process'.
2779 The original argument list, possibly modified by later configuration,
2780 is available via the function `process-contact'.
2784 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2786 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2788 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2790 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2792 usage: (make-serial-process &rest ARGS) */)
2793 (size_t nargs
, Lisp_Object
*args
)
2796 Lisp_Object proc
, contact
, port
;
2797 struct Lisp_Process
*p
;
2798 struct gcpro gcpro1
;
2799 Lisp_Object name
, buffer
;
2800 Lisp_Object tem
, val
;
2801 int specpdl_count
= -1;
2806 contact
= Flist (nargs
, args
);
2809 port
= Fplist_get (contact
, QCport
);
2811 error ("No port specified");
2812 CHECK_STRING (port
);
2814 if (NILP (Fplist_member (contact
, QCspeed
)))
2815 error (":speed not specified");
2816 if (!NILP (Fplist_get (contact
, QCspeed
)))
2817 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2819 name
= Fplist_get (contact
, QCname
);
2822 CHECK_STRING (name
);
2823 proc
= make_process (name
);
2824 specpdl_count
= SPECPDL_INDEX ();
2825 record_unwind_protect (make_serial_process_unwind
, proc
);
2826 p
= XPROCESS (proc
);
2828 fd
= serial_open (SSDATA (port
));
2831 if (fd
> max_process_desc
)
2832 max_process_desc
= fd
;
2833 chan_process
[fd
] = proc
;
2835 buffer
= Fplist_get (contact
, QCbuffer
);
2838 buffer
= Fget_buffer_create (buffer
);
2841 p
->childp
= contact
;
2842 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2844 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2845 p
->filter
= Fplist_get (contact
, QCfilter
);
2847 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2848 p
->kill_without_query
= 1;
2849 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2853 if (!EQ (p
->command
, Qt
))
2855 FD_SET (fd
, &input_wait_mask
);
2856 FD_SET (fd
, &non_keyboard_wait_mask
);
2859 if (BUFFERP (buffer
))
2861 set_marker_both (p
->mark
, buffer
,
2862 BUF_ZV (XBUFFER (buffer
)),
2863 BUF_ZV_BYTE (XBUFFER (buffer
)));
2866 tem
= Fplist_member (contact
, QCcoding
);
2867 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2873 val
= XCAR (XCDR (tem
));
2877 else if (!NILP (Vcoding_system_for_read
))
2878 val
= Vcoding_system_for_read
;
2879 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2880 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2882 p
->decode_coding_system
= val
;
2887 val
= XCAR (XCDR (tem
));
2891 else if (!NILP (Vcoding_system_for_write
))
2892 val
= Vcoding_system_for_write
;
2893 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2894 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2896 p
->encode_coding_system
= val
;
2898 setup_process_coding_systems (proc
);
2899 p
->decoding_buf
= empty_unibyte_string
;
2900 p
->decoding_carryover
= 0;
2901 p
->encoding_buf
= empty_unibyte_string
;
2902 p
->inherit_coding_system_flag
2903 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2905 Fserial_process_configure (nargs
, args
);
2907 specpdl_ptr
= specpdl
+ specpdl_count
;
2913 /* Create a network stream/datagram client/server process. Treated
2914 exactly like a normal process when reading and writing. Primary
2915 differences are in status display and process deletion. A network
2916 connection has no PID; you cannot signal it. All you can do is
2917 stop/continue it and deactivate/close it via delete-process */
2919 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2921 doc
: /* Create and return a network server or client process.
2923 In Emacs, network connections are represented by process objects, so
2924 input and output work as for subprocesses and `delete-process' closes
2925 a network connection. However, a network process has no process id,
2926 it cannot be signaled, and the status codes are different from normal
2929 Arguments are specified as keyword/argument pairs. The following
2930 arguments are defined:
2932 :name NAME -- NAME is name for process. It is modified if necessary
2935 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2936 with the process. Process output goes at end of that buffer, unless
2937 you specify an output stream or filter function to handle the output.
2938 BUFFER may be also nil, meaning that this process is not associated
2941 :host HOST -- HOST is name of the host to connect to, or its IP
2942 address. The symbol `local' specifies the local host. If specified
2943 for a server process, it must be a valid name or address for the local
2944 host, and only clients connecting to that address will be accepted.
2946 :service SERVICE -- SERVICE is name of the service desired, or an
2947 integer specifying a port number to connect to. If SERVICE is t,
2948 a random port number is selected for the server. (If Emacs was
2949 compiled with getaddrinfo, a port number can also be specified as a
2950 string, e.g. "80", as well as an integer. This is not portable.)
2952 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2953 stream type connection, `datagram' creates a datagram type connection,
2954 `seqpacket' creates a reliable datagram connection.
2956 :family FAMILY -- FAMILY is the address (and protocol) family for the
2957 service specified by HOST and SERVICE. The default (nil) is to use
2958 whatever address family (IPv4 or IPv6) that is defined for the host
2959 and port number specified by HOST and SERVICE. Other address families
2961 local -- for a local (i.e. UNIX) address specified by SERVICE.
2962 ipv4 -- use IPv4 address family only.
2963 ipv6 -- use IPv6 address family only.
2965 :local ADDRESS -- ADDRESS is the local address used for the connection.
2966 This parameter is ignored when opening a client process. When specified
2967 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2969 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2970 connection. This parameter is ignored when opening a stream server
2971 process. For a datagram server process, it specifies the initial
2972 setting of the remote datagram address. When specified for a client
2973 process, the FAMILY, HOST, and SERVICE args are ignored.
2975 The format of ADDRESS depends on the address family:
2976 - An IPv4 address is represented as an vector of integers [A B C D P]
2977 corresponding to numeric IP address A.B.C.D and port number P.
2978 - A local address is represented as a string with the address in the
2979 local address space.
2980 - An "unsupported family" address is represented by a cons (F . AV)
2981 where F is the family number and AV is a vector containing the socket
2982 address data with one element per address data byte. Do not rely on
2983 this format in portable code, as it may depend on implementation
2984 defined constants, data sizes, and data structure alignment.
2986 :coding CODING -- If CODING is a symbol, it specifies the coding
2987 system used for both reading and writing for this process. If CODING
2988 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2989 ENCODING is used for writing.
2991 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2992 return without waiting for the connection to complete; instead, the
2993 sentinel function will be called with second arg matching "open" (if
2994 successful) or "failed" when the connect completes. Default is to use
2995 a blocking connect (i.e. wait) for stream type connections.
2997 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2998 running when Emacs is exited.
3000 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
3001 In the stopped state, a server process does not accept new
3002 connections, and a client process does not handle incoming traffic.
3003 The stopped state is cleared by `continue-process' and set by
3006 :filter FILTER -- Install FILTER as the process filter.
3008 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
3009 process filter are multibyte, otherwise they are unibyte.
3010 If this keyword is not specified, the strings are multibyte if
3011 `default-enable-multibyte-characters' is non-nil.
3013 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
3015 :log LOG -- Install LOG as the server process log function. This
3016 function is called when the server accepts a network connection from a
3017 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
3018 is the server process, CLIENT is the new process for the connection,
3019 and MESSAGE is a string.
3021 :plist PLIST -- Install PLIST as the new process' initial plist.
3023 :server QLEN -- if QLEN is non-nil, create a server process for the
3024 specified FAMILY, SERVICE, and connection type (stream or datagram).
3025 If QLEN is an integer, it is used as the max. length of the server's
3026 pending connection queue (also known as the backlog); the default
3027 queue length is 5. Default is to create a client process.
3029 The following network options can be specified for this connection:
3031 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
3032 :dontroute BOOL -- Only send to directly connected hosts.
3033 :keepalive BOOL -- Send keep-alive messages on network stream.
3034 :linger BOOL or TIMEOUT -- Send queued messages before closing.
3035 :oobinline BOOL -- Place out-of-band data in receive data stream.
3036 :priority INT -- Set protocol defined priority for sent packets.
3037 :reuseaddr BOOL -- Allow reusing a recently used local address
3038 (this is allowed by default for a server process).
3039 :bindtodevice NAME -- bind to interface NAME. Using this may require
3040 special privileges on some systems.
3042 Consult the relevant system programmer's manual pages for more
3043 information on using these options.
3046 A server process will listen for and accept connections from clients.
3047 When a client connection is accepted, a new network process is created
3048 for the connection with the following parameters:
3050 - The client's process name is constructed by concatenating the server
3051 process' NAME and a client identification string.
3052 - If the FILTER argument is non-nil, the client process will not get a
3053 separate process buffer; otherwise, the client's process buffer is a newly
3054 created buffer named after the server process' BUFFER name or process
3055 NAME concatenated with the client identification string.
3056 - The connection type and the process filter and sentinel parameters are
3057 inherited from the server process' TYPE, FILTER and SENTINEL.
3058 - The client process' contact info is set according to the client's
3059 addressing information (typically an IP address and a port number).
3060 - The client process' plist is initialized from the server's plist.
3062 Notice that the FILTER and SENTINEL args are never used directly by
3063 the server process. Also, the BUFFER argument is not used directly by
3064 the server process, but via the optional :log function, accepted (and
3065 failed) connections may be logged in the server process' buffer.
3067 The original argument list, modified with the actual connection
3068 information, is available via the `process-contact' function.
3070 usage: (make-network-process &rest ARGS) */)
3071 (size_t nargs
, Lisp_Object
*args
)
3074 Lisp_Object contact
;
3075 struct Lisp_Process
*p
;
3076 #ifdef HAVE_GETADDRINFO
3077 struct addrinfo ai
, *res
, *lres
;
3078 struct addrinfo hints
;
3079 const char *portstring
;
3081 #else /* HAVE_GETADDRINFO */
3082 struct _emacs_addrinfo
3088 struct sockaddr
*ai_addr
;
3089 struct _emacs_addrinfo
*ai_next
;
3091 #endif /* HAVE_GETADDRINFO */
3092 struct sockaddr_in address_in
;
3093 #ifdef HAVE_LOCAL_SOCKETS
3094 struct sockaddr_un address_un
;
3099 int s
= -1, outch
, inch
;
3100 struct gcpro gcpro1
;
3101 int count
= SPECPDL_INDEX ();
3103 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
3105 Lisp_Object name
, buffer
, host
, service
, address
;
3106 Lisp_Object filter
, sentinel
;
3107 int is_non_blocking_client
= 0;
3108 int is_server
= 0, backlog
= 5;
3115 /* Save arguments for process-contact and clone-process. */
3116 contact
= Flist (nargs
, args
);
3120 /* Ensure socket support is loaded if available. */
3121 init_winsock (TRUE
);
3124 /* :type TYPE (nil: stream, datagram */
3125 tem
= Fplist_get (contact
, QCtype
);
3127 socktype
= SOCK_STREAM
;
3128 #ifdef DATAGRAM_SOCKETS
3129 else if (EQ (tem
, Qdatagram
))
3130 socktype
= SOCK_DGRAM
;
3132 #ifdef HAVE_SEQPACKET
3133 else if (EQ (tem
, Qseqpacket
))
3134 socktype
= SOCK_SEQPACKET
;
3137 error ("Unsupported connection type");
3140 tem
= Fplist_get (contact
, QCserver
);
3143 /* Don't support network sockets when non-blocking mode is
3144 not available, since a blocked Emacs is not useful. */
3145 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
3146 error ("Network servers not supported");
3150 backlog
= XINT (tem
);
3154 /* Make QCaddress an alias for :local (server) or :remote (client). */
3155 QCaddress
= is_server
? QClocal
: QCremote
;
3158 if (!is_server
&& socktype
!= SOCK_DGRAM
3159 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
3161 #ifndef NON_BLOCKING_CONNECT
3162 error ("Non-blocking connect not supported");
3164 is_non_blocking_client
= 1;
3168 name
= Fplist_get (contact
, QCname
);
3169 buffer
= Fplist_get (contact
, QCbuffer
);
3170 filter
= Fplist_get (contact
, QCfilter
);
3171 sentinel
= Fplist_get (contact
, QCsentinel
);
3173 CHECK_STRING (name
);
3175 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3176 ai
.ai_socktype
= socktype
;
3181 /* :local ADDRESS or :remote ADDRESS */
3182 address
= Fplist_get (contact
, QCaddress
);
3183 if (!NILP (address
))
3185 host
= service
= Qnil
;
3187 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3188 error ("Malformed :address");
3189 ai
.ai_family
= family
;
3190 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3191 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3195 /* :family FAMILY -- nil (for Inet), local, or integer. */
3196 tem
= Fplist_get (contact
, QCfamily
);
3199 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3205 #ifdef HAVE_LOCAL_SOCKETS
3206 else if (EQ (tem
, Qlocal
))
3210 else if (EQ (tem
, Qipv6
))
3213 else if (EQ (tem
, Qipv4
))
3215 else if (INTEGERP (tem
))
3216 family
= XINT (tem
);
3218 error ("Unknown address family");
3220 ai
.ai_family
= family
;
3222 /* :service SERVICE -- string, integer (port number), or t (random port). */
3223 service
= Fplist_get (contact
, QCservice
);
3225 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3226 host
= Fplist_get (contact
, QChost
);
3229 if (EQ (host
, Qlocal
))
3230 /* Depending on setup, "localhost" may map to different IPv4 and/or
3231 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3232 host
= build_string ("127.0.0.1");
3233 CHECK_STRING (host
);
3236 #ifdef HAVE_LOCAL_SOCKETS
3237 if (family
== AF_LOCAL
)
3241 message (":family local ignores the :host \"%s\" property",
3243 contact
= Fplist_put (contact
, QChost
, Qnil
);
3246 CHECK_STRING (service
);
3247 memset (&address_un
, 0, sizeof address_un
);
3248 address_un
.sun_family
= AF_LOCAL
;
3249 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3250 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3251 ai
.ai_addrlen
= sizeof address_un
;
3256 /* Slow down polling to every ten seconds.
3257 Some kernels have a bug which causes retrying connect to fail
3258 after a connect. Polling can interfere with gethostbyname too. */
3259 #ifdef POLL_FOR_INPUT
3260 if (socktype
!= SOCK_DGRAM
)
3262 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3263 bind_polling_period (10);
3267 #ifdef HAVE_GETADDRINFO
3268 /* If we have a host, use getaddrinfo to resolve both host and service.
3269 Otherwise, use getservbyname to lookup the service. */
3273 /* SERVICE can either be a string or int.
3274 Convert to a C string for later use by getaddrinfo. */
3275 if (EQ (service
, Qt
))
3277 else if (INTEGERP (service
))
3279 sprintf (portbuf
, "%ld", (long) XINT (service
));
3280 portstring
= portbuf
;
3284 CHECK_STRING (service
);
3285 portstring
= SSDATA (service
);
3290 memset (&hints
, 0, sizeof (hints
));
3292 hints
.ai_family
= family
;
3293 hints
.ai_socktype
= socktype
;
3294 hints
.ai_protocol
= 0;
3296 #ifdef HAVE_RES_INIT
3300 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3302 #ifdef HAVE_GAI_STRERROR
3303 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3305 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3311 #endif /* HAVE_GETADDRINFO */
3313 /* We end up here if getaddrinfo is not defined, or in case no hostname
3314 has been specified (e.g. for a local server process). */
3316 if (EQ (service
, Qt
))
3318 else if (INTEGERP (service
))
3319 port
= htons ((unsigned short) XINT (service
));
3322 struct servent
*svc_info
;
3323 CHECK_STRING (service
);
3324 svc_info
= getservbyname (SSDATA (service
),
3325 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3327 error ("Unknown service: %s", SDATA (service
));
3328 port
= svc_info
->s_port
;
3331 memset (&address_in
, 0, sizeof address_in
);
3332 address_in
.sin_family
= family
;
3333 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3334 address_in
.sin_port
= port
;
3336 #ifndef HAVE_GETADDRINFO
3339 struct hostent
*host_info_ptr
;
3341 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3342 as it may `hang' Emacs for a very long time. */
3346 #ifdef HAVE_RES_INIT
3350 host_info_ptr
= gethostbyname (SDATA (host
));
3355 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3356 host_info_ptr
->h_length
);
3357 family
= host_info_ptr
->h_addrtype
;
3358 address_in
.sin_family
= family
;
3361 /* Attempt to interpret host as numeric inet address */
3363 unsigned long numeric_addr
;
3364 numeric_addr
= inet_addr (SSDATA (host
));
3365 if (numeric_addr
== -1)
3366 error ("Unknown host \"%s\"", SDATA (host
));
3368 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3369 sizeof (address_in
.sin_addr
));
3373 #endif /* not HAVE_GETADDRINFO */
3375 ai
.ai_family
= family
;
3376 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3377 ai
.ai_addrlen
= sizeof address_in
;
3381 /* Do this in case we never enter the for-loop below. */
3382 count1
= SPECPDL_INDEX ();
3385 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3394 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3401 #ifdef DATAGRAM_SOCKETS
3402 if (!is_server
&& socktype
== SOCK_DGRAM
)
3404 #endif /* DATAGRAM_SOCKETS */
3406 #ifdef NON_BLOCKING_CONNECT
3407 if (is_non_blocking_client
)
3410 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3412 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3424 /* Make us close S if quit. */
3425 record_unwind_protect (close_file_unwind
, make_number (s
));
3427 /* Parse network options in the arg list.
3428 We simply ignore anything which isn't a known option (including other keywords).
3429 An error is signaled if setting a known option fails. */
3430 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3431 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3435 /* Configure as a server socket. */
3437 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3438 explicit :reuseaddr key to override this. */
3439 #ifdef HAVE_LOCAL_SOCKETS
3440 if (family
!= AF_LOCAL
)
3442 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3445 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3446 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3449 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3450 report_file_error ("Cannot bind server socket", Qnil
);
3452 #ifdef HAVE_GETSOCKNAME
3453 if (EQ (service
, Qt
))
3455 struct sockaddr_in sa1
;
3456 socklen_t len1
= sizeof (sa1
);
3457 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3459 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3460 service
= make_number (ntohs (sa1
.sin_port
));
3461 contact
= Fplist_put (contact
, QCservice
, service
);
3466 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3467 report_file_error ("Cannot listen on server socket", Qnil
);
3475 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3478 if (ret
== 0 || xerrno
== EISCONN
)
3480 /* The unwind-protect will be discarded afterwards.
3481 Likewise for immediate_quit. */
3485 #ifdef NON_BLOCKING_CONNECT
3487 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3491 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3498 if (xerrno
== EINTR
)
3500 /* Unlike most other syscalls connect() cannot be called
3501 again. (That would return EALREADY.) The proper way to
3502 wait for completion is select(). */
3510 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3517 report_file_error ("select failed", Qnil
);
3521 len
= sizeof xerrno
;
3522 eassert (FD_ISSET (s
, &fdset
));
3523 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3524 report_file_error ("getsockopt failed", Qnil
);
3526 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3530 #endif /* !WINDOWSNT */
3534 /* Discard the unwind protect closing S. */
3535 specpdl_ptr
= specpdl
+ count1
;
3540 if (xerrno
== EINTR
)
3547 #ifdef DATAGRAM_SOCKETS
3548 if (socktype
== SOCK_DGRAM
)
3550 if (datagram_address
[s
].sa
)
3552 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3553 datagram_address
[s
].len
= lres
->ai_addrlen
;
3557 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3558 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3561 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3562 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3563 conv_lisp_to_sockaddr (rfamily
, remote
,
3564 datagram_address
[s
].sa
, rlen
);
3568 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3571 contact
= Fplist_put (contact
, QCaddress
,
3572 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3573 #ifdef HAVE_GETSOCKNAME
3576 struct sockaddr_in sa1
;
3577 socklen_t len1
= sizeof (sa1
);
3578 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3579 contact
= Fplist_put (contact
, QClocal
,
3580 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3587 #ifdef HAVE_GETADDRINFO
3596 /* Discard the unwind protect for closing S, if any. */
3597 specpdl_ptr
= specpdl
+ count1
;
3599 /* Unwind bind_polling_period and request_sigio. */
3600 unbind_to (count
, Qnil
);
3604 /* If non-blocking got this far - and failed - assume non-blocking is
3605 not supported after all. This is probably a wrong assumption, but
3606 the normal blocking calls to open-network-stream handles this error
3608 if (is_non_blocking_client
)
3613 report_file_error ("make server process failed", contact
);
3615 report_file_error ("make client process failed", contact
);
3622 buffer
= Fget_buffer_create (buffer
);
3623 proc
= make_process (name
);
3625 chan_process
[inch
] = proc
;
3628 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3631 fcntl (inch
, F_SETFL
, O_NDELAY
);
3635 p
= XPROCESS (proc
);
3637 p
->childp
= contact
;
3638 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3642 p
->sentinel
= sentinel
;
3644 p
->log
= Fplist_get (contact
, QClog
);
3645 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3646 p
->kill_without_query
= 1;
3647 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3652 if (is_server
&& socktype
!= SOCK_DGRAM
)
3653 p
->status
= Qlisten
;
3655 /* Make the process marker point into the process buffer (if any). */
3656 if (BUFFERP (buffer
))
3657 set_marker_both (p
->mark
, buffer
,
3658 BUF_ZV (XBUFFER (buffer
)),
3659 BUF_ZV_BYTE (XBUFFER (buffer
)));
3661 #ifdef NON_BLOCKING_CONNECT
3662 if (is_non_blocking_client
)
3664 /* We may get here if connect did succeed immediately. However,
3665 in that case, we still need to signal this like a non-blocking
3667 p
->status
= Qconnect
;
3668 if (!FD_ISSET (inch
, &connect_wait_mask
))
3670 FD_SET (inch
, &connect_wait_mask
);
3671 FD_SET (inch
, &write_mask
);
3672 num_pending_connects
++;
3677 /* A server may have a client filter setting of Qt, but it must
3678 still listen for incoming connects unless it is stopped. */
3679 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3680 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3682 FD_SET (inch
, &input_wait_mask
);
3683 FD_SET (inch
, &non_keyboard_wait_mask
);
3686 if (inch
> max_process_desc
)
3687 max_process_desc
= inch
;
3689 tem
= Fplist_member (contact
, QCcoding
);
3690 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3691 tem
= Qnil
; /* No error message (too late!). */
3694 /* Setup coding systems for communicating with the network stream. */
3695 struct gcpro inner_gcpro1
;
3696 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3697 Lisp_Object coding_systems
= Qt
;
3698 Lisp_Object fargs
[5], val
;
3702 val
= XCAR (XCDR (tem
));
3706 else if (!NILP (Vcoding_system_for_read
))
3707 val
= Vcoding_system_for_read
;
3708 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3709 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3710 /* We dare not decode end-of-line format by setting VAL to
3711 Qraw_text, because the existing Emacs Lisp libraries
3712 assume that they receive bare code including a sequene of
3717 if (NILP (host
) || NILP (service
))
3718 coding_systems
= Qnil
;
3721 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3722 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3723 GCPRO1_VAR (proc
, inner_gcpro
);
3724 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3725 UNGCPRO_VAR (inner_gcpro
);
3727 if (CONSP (coding_systems
))
3728 val
= XCAR (coding_systems
);
3729 else if (CONSP (Vdefault_process_coding_system
))
3730 val
= XCAR (Vdefault_process_coding_system
);
3734 p
->decode_coding_system
= val
;
3738 val
= XCAR (XCDR (tem
));
3742 else if (!NILP (Vcoding_system_for_write
))
3743 val
= Vcoding_system_for_write
;
3744 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3748 if (EQ (coding_systems
, Qt
))
3750 if (NILP (host
) || NILP (service
))
3751 coding_systems
= Qnil
;
3754 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3755 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3756 GCPRO1_VAR (proc
, inner_gcpro
);
3757 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3758 UNGCPRO_VAR (inner_gcpro
);
3761 if (CONSP (coding_systems
))
3762 val
= XCDR (coding_systems
);
3763 else if (CONSP (Vdefault_process_coding_system
))
3764 val
= XCDR (Vdefault_process_coding_system
);
3768 p
->encode_coding_system
= val
;
3770 setup_process_coding_systems (proc
);
3772 p
->decoding_buf
= empty_unibyte_string
;
3773 p
->decoding_carryover
= 0;
3774 p
->encoding_buf
= empty_unibyte_string
;
3776 p
->inherit_coding_system_flag
3777 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3784 #if defined(HAVE_NET_IF_H)
3787 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3788 doc
: /* Return an alist of all network interfaces and their network address.
3789 Each element is a cons, the car of which is a string containing the
3790 interface name, and the cdr is the network address in internal
3791 format; see the description of ADDRESS in `make-network-process'. */)
3794 struct ifconf ifconf
;
3795 struct ifreq
*ifreqs
= NULL
;
3800 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3806 buf_size
= ifaces
* sizeof (ifreqs
[0]);
3807 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3814 ifconf
.ifc_len
= buf_size
;
3815 ifconf
.ifc_req
= ifreqs
;
3816 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3822 if (ifconf
.ifc_len
== buf_size
)
3826 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3829 while (--ifaces
>= 0)
3831 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3832 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3833 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3835 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3836 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3837 res
= Fcons (Fcons (build_string (namebuf
),
3838 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3839 sizeof (struct sockaddr
))),
3845 #endif /* SIOCGIFCONF */
3847 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3851 const char *flag_sym
;
3854 static const struct ifflag_def ifflag_table
[] = {
3858 #ifdef IFF_BROADCAST
3859 { IFF_BROADCAST
, "broadcast" },
3862 { IFF_DEBUG
, "debug" },
3865 { IFF_LOOPBACK
, "loopback" },
3867 #ifdef IFF_POINTOPOINT
3868 { IFF_POINTOPOINT
, "pointopoint" },
3871 { IFF_RUNNING
, "running" },
3874 { IFF_NOARP
, "noarp" },
3877 { IFF_PROMISC
, "promisc" },
3879 #ifdef IFF_NOTRAILERS
3880 { IFF_NOTRAILERS
, "notrailers" },
3883 { IFF_ALLMULTI
, "allmulti" },
3886 { IFF_MASTER
, "master" },
3889 { IFF_SLAVE
, "slave" },
3891 #ifdef IFF_MULTICAST
3892 { IFF_MULTICAST
, "multicast" },
3895 { IFF_PORTSEL
, "portsel" },
3897 #ifdef IFF_AUTOMEDIA
3898 { IFF_AUTOMEDIA
, "automedia" },
3901 { IFF_DYNAMIC
, "dynamic" },
3904 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3907 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3910 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3913 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3916 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3921 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3922 doc
: /* Return information about network interface named IFNAME.
3923 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3924 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3925 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3926 FLAGS is the current flags of the interface. */)
3927 (Lisp_Object ifname
)
3930 Lisp_Object res
= Qnil
;
3935 CHECK_STRING (ifname
);
3937 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3938 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3940 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3945 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3946 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3948 int flags
= rq
.ifr_flags
;
3949 const struct ifflag_def
*fp
;
3953 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3955 if (flags
& fp
->flag_bit
)
3957 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3958 flags
-= fp
->flag_bit
;
3961 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3963 if (flags
& (1 << fnum
))
3965 elt
= Fcons (make_number (fnum
), elt
);
3970 res
= Fcons (elt
, res
);
3973 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3974 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3976 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3977 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3981 for (n
= 0; n
< 6; n
++)
3982 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3983 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3986 res
= Fcons (elt
, res
);
3989 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3990 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3993 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3994 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3996 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4000 res
= Fcons (elt
, res
);
4003 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4004 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4007 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4010 res
= Fcons (elt
, res
);
4013 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
4014 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4017 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4020 res
= Fcons (elt
, res
);
4024 return any
? res
: Qnil
;
4027 #endif /* defined(HAVE_NET_IF_H) */
4029 /* Turn off input and output for process PROC. */
4032 deactivate_process (Lisp_Object proc
)
4034 register int inchannel
, outchannel
;
4035 register struct Lisp_Process
*p
= XPROCESS (proc
);
4037 inchannel
= p
->infd
;
4038 outchannel
= p
->outfd
;
4040 #ifdef ADAPTIVE_READ_BUFFERING
4041 if (p
->read_output_delay
> 0)
4043 if (--process_output_delay_count
< 0)
4044 process_output_delay_count
= 0;
4045 p
->read_output_delay
= 0;
4046 p
->read_output_skip
= 0;
4052 /* Beware SIGCHLD hereabouts. */
4053 flush_pending_output (inchannel
);
4054 emacs_close (inchannel
);
4055 if (outchannel
>= 0 && outchannel
!= inchannel
)
4056 emacs_close (outchannel
);
4060 #ifdef DATAGRAM_SOCKETS
4061 if (DATAGRAM_CHAN_P (inchannel
))
4063 xfree (datagram_address
[inchannel
].sa
);
4064 datagram_address
[inchannel
].sa
= 0;
4065 datagram_address
[inchannel
].len
= 0;
4068 chan_process
[inchannel
] = Qnil
;
4069 FD_CLR (inchannel
, &input_wait_mask
);
4070 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4071 #ifdef NON_BLOCKING_CONNECT
4072 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4074 FD_CLR (inchannel
, &connect_wait_mask
);
4075 FD_CLR (inchannel
, &write_mask
);
4076 if (--num_pending_connects
< 0)
4080 if (inchannel
== max_process_desc
)
4083 /* We just closed the highest-numbered process input descriptor,
4084 so recompute the highest-numbered one now. */
4085 max_process_desc
= 0;
4086 for (i
= 0; i
< MAXDESC
; i
++)
4087 if (!NILP (chan_process
[i
]))
4088 max_process_desc
= i
;
4094 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4096 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4097 It is read into the process' buffers or given to their filter functions.
4098 Non-nil arg PROCESS means do not return until some output has been received
4101 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4102 and milliseconds to wait; return after that much time whether or not
4103 there is any subprocess output. If SECONDS is a floating point number,
4104 it specifies a fractional number of seconds to wait.
4105 The MILLISEC argument is obsolete and should be avoided.
4107 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4108 from PROCESS, suspending reading output from other processes.
4109 If JUST-THIS-ONE is an integer, don't run any timers either.
4110 Return non-nil if we received any output before the timeout expired. */)
4111 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4113 int secs
, usecs
= 0;
4115 if (! NILP (process
))
4116 CHECK_PROCESS (process
);
4118 just_this_one
= Qnil
;
4120 if (!NILP (millisec
))
4121 { /* Obsolete calling convention using integers rather than floats. */
4122 CHECK_NUMBER (millisec
);
4124 seconds
= make_float (XINT (millisec
) / 1000.0);
4127 CHECK_NUMBER (seconds
);
4128 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4132 if (!NILP (seconds
))
4134 if (INTEGERP (seconds
))
4135 secs
= XINT (seconds
);
4136 else if (FLOATP (seconds
))
4138 double timeout
= XFLOAT_DATA (seconds
);
4139 secs
= (int) timeout
;
4140 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
4143 wrong_type_argument (Qnumberp
, seconds
);
4145 if (secs
< 0 || (secs
== 0 && usecs
== 0))
4146 secs
= -1, usecs
= 0;
4149 secs
= NILP (process
) ? -1 : 0;
4152 (wait_reading_process_output (secs
, usecs
, 0, 0,
4154 !NILP (process
) ? XPROCESS (process
) : NULL
,
4155 NILP (just_this_one
) ? 0 :
4156 !INTEGERP (just_this_one
) ? 1 : -1)
4160 /* Accept a connection for server process SERVER on CHANNEL. */
4162 static int connect_counter
= 0;
4165 server_accept_connection (Lisp_Object server
, int channel
)
4167 Lisp_Object proc
, caller
, name
, buffer
;
4168 Lisp_Object contact
, host
, service
;
4169 struct Lisp_Process
*ps
= XPROCESS (server
);
4170 struct Lisp_Process
*p
;
4174 struct sockaddr_in in
;
4176 struct sockaddr_in6 in6
;
4178 #ifdef HAVE_LOCAL_SOCKETS
4179 struct sockaddr_un un
;
4182 socklen_t len
= sizeof saddr
;
4184 s
= accept (channel
, &saddr
.sa
, &len
);
4193 if (code
== EWOULDBLOCK
)
4197 if (!NILP (ps
->log
))
4198 call3 (ps
->log
, server
, Qnil
,
4199 concat3 (build_string ("accept failed with code"),
4200 Fnumber_to_string (make_number (code
)),
4201 build_string ("\n")));
4207 /* Setup a new process to handle the connection. */
4209 /* Generate a unique identification of the caller, and build contact
4210 information for this process. */
4213 switch (saddr
.sa
.sa_family
)
4217 Lisp_Object args
[5];
4218 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4219 args
[0] = build_string ("%d.%d.%d.%d");
4220 args
[1] = make_number (*ip
++);
4221 args
[2] = make_number (*ip
++);
4222 args
[3] = make_number (*ip
++);
4223 args
[4] = make_number (*ip
++);
4224 host
= Fformat (5, args
);
4225 service
= make_number (ntohs (saddr
.in
.sin_port
));
4227 args
[0] = build_string (" <%s:%d>");
4230 caller
= Fformat (3, args
);
4237 Lisp_Object args
[9];
4238 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4240 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4241 for (i
= 0; i
< 8; i
++)
4242 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4243 host
= Fformat (9, args
);
4244 service
= make_number (ntohs (saddr
.in
.sin_port
));
4246 args
[0] = build_string (" <[%s]:%d>");
4249 caller
= Fformat (3, args
);
4254 #ifdef HAVE_LOCAL_SOCKETS
4258 caller
= Fnumber_to_string (make_number (connect_counter
));
4259 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4263 /* Create a new buffer name for this process if it doesn't have a
4264 filter. The new buffer name is based on the buffer name or
4265 process name of the server process concatenated with the caller
4268 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4272 buffer
= ps
->buffer
;
4274 buffer
= Fbuffer_name (buffer
);
4279 buffer
= concat2 (buffer
, caller
);
4280 buffer
= Fget_buffer_create (buffer
);
4284 /* Generate a unique name for the new server process. Combine the
4285 server process name with the caller identification. */
4287 name
= concat2 (ps
->name
, caller
);
4288 proc
= make_process (name
);
4290 chan_process
[s
] = proc
;
4293 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4296 fcntl (s
, F_SETFL
, O_NDELAY
);
4300 p
= XPROCESS (proc
);
4302 /* Build new contact information for this setup. */
4303 contact
= Fcopy_sequence (ps
->childp
);
4304 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4305 contact
= Fplist_put (contact
, QChost
, host
);
4306 if (!NILP (service
))
4307 contact
= Fplist_put (contact
, QCservice
, service
);
4308 contact
= Fplist_put (contact
, QCremote
,
4309 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4310 #ifdef HAVE_GETSOCKNAME
4312 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4313 contact
= Fplist_put (contact
, QClocal
,
4314 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4317 p
->childp
= contact
;
4318 p
->plist
= Fcopy_sequence (ps
->plist
);
4322 p
->sentinel
= ps
->sentinel
;
4323 p
->filter
= ps
->filter
;
4330 /* Client processes for accepted connections are not stopped initially. */
4331 if (!EQ (p
->filter
, Qt
))
4333 FD_SET (s
, &input_wait_mask
);
4334 FD_SET (s
, &non_keyboard_wait_mask
);
4337 if (s
> max_process_desc
)
4338 max_process_desc
= s
;
4340 /* Setup coding system for new process based on server process.
4341 This seems to be the proper thing to do, as the coding system
4342 of the new process should reflect the settings at the time the
4343 server socket was opened; not the current settings. */
4345 p
->decode_coding_system
= ps
->decode_coding_system
;
4346 p
->encode_coding_system
= ps
->encode_coding_system
;
4347 setup_process_coding_systems (proc
);
4349 p
->decoding_buf
= empty_unibyte_string
;
4350 p
->decoding_carryover
= 0;
4351 p
->encoding_buf
= empty_unibyte_string
;
4353 p
->inherit_coding_system_flag
4354 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4356 if (!NILP (ps
->log
))
4357 call3 (ps
->log
, server
, proc
,
4358 concat3 (build_string ("accept from "),
4359 (STRINGP (host
) ? host
: build_string ("-")),
4360 build_string ("\n")));
4362 if (!NILP (p
->sentinel
))
4363 exec_sentinel (proc
,
4364 concat3 (build_string ("open from "),
4365 (STRINGP (host
) ? host
: build_string ("-")),
4366 build_string ("\n")));
4369 /* This variable is different from waiting_for_input in keyboard.c.
4370 It is used to communicate to a lisp process-filter/sentinel (via the
4371 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4372 for user-input when that process-filter was called.
4373 waiting_for_input cannot be used as that is by definition 0 when
4374 lisp code is being evalled.
4375 This is also used in record_asynch_buffer_change.
4376 For that purpose, this must be 0
4377 when not inside wait_reading_process_output. */
4378 static int waiting_for_user_input_p
;
4381 wait_reading_process_output_unwind (Lisp_Object data
)
4383 waiting_for_user_input_p
= XINT (data
);
4387 /* This is here so breakpoints can be put on it. */
4389 wait_reading_process_output_1 (void)
4393 /* Use a wrapper around select to work around a bug in gdb 5.3.
4394 Normally, the wrapper is optimized away by inlining.
4396 If emacs is stopped inside select, the gdb backtrace doesn't
4397 show the function which called select, so it is practically
4398 impossible to step through wait_reading_process_output. */
4402 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4404 return select (n
, rfd
, wfd
, xfd
, tmo
);
4406 #define select select_wrapper
4409 /* Read and dispose of subprocess output while waiting for timeout to
4410 elapse and/or keyboard input to be available.
4413 timeout in seconds, or
4414 zero for no limit, or
4415 -1 means gobble data immediately available but don't wait for any.
4418 an additional duration to wait, measured in microseconds.
4419 If this is nonzero and time_limit is 0, then the timeout
4420 consists of MICROSECS only.
4422 READ_KBD is a lisp value:
4423 0 to ignore keyboard input, or
4424 1 to return when input is available, or
4425 -1 meaning caller will actually read the input, so don't throw to
4426 the quit handler, or
4428 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4429 output that arrives.
4431 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4432 (and gobble terminal input into the buffer if any arrives).
4434 If WAIT_PROC is specified, wait until something arrives from that
4435 process. The return value is true if we read some input from
4438 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4439 (suspending output from other processes). A negative value
4440 means don't run any timers either.
4442 If WAIT_PROC is specified, then the function returns true if we
4443 received input from that process before the timeout elapsed.
4444 Otherwise, return true if we received input from any process. */
4447 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4449 Lisp_Object wait_for_cell
,
4450 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4452 register int channel
, nfds
;
4453 SELECT_TYPE Available
;
4454 SELECT_TYPE Writeok
;
4456 int check_delay
, no_avail
;
4459 EMACS_TIME timeout
, end_time
;
4460 int wait_channel
= -1;
4461 int got_some_input
= 0;
4462 int count
= SPECPDL_INDEX ();
4464 FD_ZERO (&Available
);
4467 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4468 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4469 message ("Blocking call to accept-process-output with quit inhibited!!");
4471 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4472 if (wait_proc
!= NULL
)
4473 wait_channel
= wait_proc
->infd
;
4475 record_unwind_protect (wait_reading_process_output_unwind
,
4476 make_number (waiting_for_user_input_p
));
4477 waiting_for_user_input_p
= read_kbd
;
4479 /* Since we may need to wait several times,
4480 compute the absolute time to return at. */
4481 if (time_limit
|| microsecs
)
4483 EMACS_GET_TIME (end_time
);
4484 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4485 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4490 int timeout_reduced_for_timers
= 0;
4492 /* If calling from keyboard input, do not quit
4493 since we want to return C-g as an input character.
4494 Otherwise, do pending quit if requested. */
4499 process_pending_signals ();
4502 /* Exit now if the cell we're waiting for became non-nil. */
4503 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4506 /* Compute time from now till when time limit is up */
4507 /* Exit if already run out */
4508 if (time_limit
== -1)
4510 /* -1 specified for timeout means
4511 gobble output available now
4512 but don't wait at all. */
4514 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4516 else if (time_limit
|| microsecs
)
4518 EMACS_GET_TIME (timeout
);
4519 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4520 if (EMACS_TIME_NEG_P (timeout
))
4525 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4528 /* Normally we run timers here.
4529 But not if wait_for_cell; in those cases,
4530 the wait is supposed to be short,
4531 and those callers cannot handle running arbitrary Lisp code here. */
4532 if (NILP (wait_for_cell
)
4533 && just_wait_proc
>= 0)
4535 EMACS_TIME timer_delay
;
4539 int old_timers_run
= timers_run
;
4540 struct buffer
*old_buffer
= current_buffer
;
4541 Lisp_Object old_window
= selected_window
;
4543 timer_delay
= timer_check ();
4545 /* If a timer has run, this might have changed buffers
4546 an alike. Make read_key_sequence aware of that. */
4547 if (timers_run
!= old_timers_run
4548 && (old_buffer
!= current_buffer
4549 || !EQ (old_window
, selected_window
))
4550 && waiting_for_user_input_p
== -1)
4551 record_asynch_buffer_change ();
4553 if (timers_run
!= old_timers_run
&& do_display
)
4554 /* We must retry, since a timer may have requeued itself
4555 and that could alter the time_delay. */
4556 redisplay_preserve_echo_area (9);
4560 while (!detect_input_pending ());
4562 /* If there is unread keyboard input, also return. */
4564 && requeued_events_pending_p ())
4567 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4569 EMACS_TIME difference
;
4570 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4571 if (EMACS_TIME_NEG_P (difference
))
4573 timeout
= timer_delay
;
4574 timeout_reduced_for_timers
= 1;
4577 /* If time_limit is -1, we are not going to wait at all. */
4578 else if (time_limit
!= -1)
4580 /* This is so a breakpoint can be put here. */
4581 wait_reading_process_output_1 ();
4585 /* Cause C-g and alarm signals to take immediate action,
4586 and cause input available signals to zero out timeout.
4588 It is important that we do this before checking for process
4589 activity. If we get a SIGCHLD after the explicit checks for
4590 process activity, timeout is the only way we will know. */
4592 set_waiting_for_input (&timeout
);
4594 /* If status of something has changed, and no input is
4595 available, notify the user of the change right away. After
4596 this explicit check, we'll let the SIGCHLD handler zap
4597 timeout to get our attention. */
4598 if (update_tick
!= process_tick
)
4603 if (kbd_on_hold_p ())
4606 Atemp
= input_wait_mask
;
4609 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4610 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4612 #ifdef NON_BLOCKING_CONNECT
4613 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4617 (SELECT_TYPE
*)0, &timeout
)
4620 /* It's okay for us to do this and then continue with
4621 the loop, since timeout has already been zeroed out. */
4622 clear_waiting_for_input ();
4623 status_notify (NULL
);
4624 if (do_display
) redisplay_preserve_echo_area (13);
4628 /* Don't wait for output from a non-running process. Just
4629 read whatever data has already been received. */
4630 if (wait_proc
&& wait_proc
->raw_status_new
)
4631 update_status (wait_proc
);
4633 && ! EQ (wait_proc
->status
, Qrun
)
4634 && ! EQ (wait_proc
->status
, Qconnect
))
4636 int nread
, total_nread
= 0;
4638 clear_waiting_for_input ();
4639 XSETPROCESS (proc
, wait_proc
);
4641 /* Read data from the process, until we exhaust it. */
4642 while (wait_proc
->infd
>= 0)
4644 nread
= read_process_output (proc
, wait_proc
->infd
);
4651 total_nread
+= nread
;
4655 else if (nread
== -1 && EIO
== errno
)
4659 else if (nread
== -1 && EAGAIN
== errno
)
4663 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4667 if (total_nread
> 0 && do_display
)
4668 redisplay_preserve_echo_area (10);
4673 /* Wait till there is something to do */
4675 if (wait_proc
&& just_wait_proc
)
4677 if (wait_proc
->infd
< 0) /* Terminated */
4679 FD_SET (wait_proc
->infd
, &Available
);
4683 else if (!NILP (wait_for_cell
))
4685 Available
= non_process_wait_mask
;
4692 Available
= non_keyboard_wait_mask
;
4694 Available
= input_wait_mask
;
4695 Writeok
= write_mask
;
4696 #ifdef SELECT_CANT_DO_WRITE_MASK
4701 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4704 /* If frame size has changed or the window is newly mapped,
4705 redisplay now, before we start to wait. There is a race
4706 condition here; if a SIGIO arrives between now and the select
4707 and indicates that a frame is trashed, the select may block
4708 displaying a trashed screen. */
4709 if (frame_garbaged
&& do_display
)
4711 clear_waiting_for_input ();
4712 redisplay_preserve_echo_area (11);
4714 set_waiting_for_input (&timeout
);
4718 if (read_kbd
&& detect_input_pending ())
4726 #ifdef ADAPTIVE_READ_BUFFERING
4727 /* Set the timeout for adaptive read buffering if any
4728 process has non-zero read_output_skip and non-zero
4729 read_output_delay, and we are not reading output for a
4730 specific wait_channel. It is not executed if
4731 Vprocess_adaptive_read_buffering is nil. */
4732 if (process_output_skip
&& check_delay
> 0)
4734 int usecs
= EMACS_USECS (timeout
);
4735 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4736 usecs
= READ_OUTPUT_DELAY_MAX
;
4737 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4739 proc
= chan_process
[channel
];
4742 /* Find minimum non-zero read_output_delay among the
4743 processes with non-zero read_output_skip. */
4744 if (XPROCESS (proc
)->read_output_delay
> 0)
4747 if (!XPROCESS (proc
)->read_output_skip
)
4749 FD_CLR (channel
, &Available
);
4750 XPROCESS (proc
)->read_output_skip
= 0;
4751 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4752 usecs
= XPROCESS (proc
)->read_output_delay
;
4755 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4756 process_output_skip
= 0;
4759 #if defined (USE_GTK) || defined (HAVE_GCONF)
4761 #elif defined (HAVE_NS)
4766 (max (max_process_desc
, max_input_desc
) + 1,
4768 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4769 (SELECT_TYPE
*)0, &timeout
);
4774 /* Make C-g and alarm signals set flags again */
4775 clear_waiting_for_input ();
4777 /* If we woke up due to SIGWINCH, actually change size now. */
4778 do_pending_window_change (0);
4780 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4781 /* We wanted the full specified time, so return now. */
4785 if (xerrno
== EINTR
)
4787 else if (xerrno
== EBADF
)
4790 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4791 the child's closure of the pts gives the parent a SIGHUP, and
4792 the ptc file descriptor is automatically closed,
4793 yielding EBADF here or at select() call above.
4794 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4795 in m/ibmrt-aix.h), and here we just ignore the select error.
4796 Cleanup occurs c/o status_notify after SIGCLD. */
4797 no_avail
= 1; /* Cannot depend on values returned */
4803 error ("select error: %s", emacs_strerror (xerrno
));
4808 FD_ZERO (&Available
);
4812 #if 0 /* When polling is used, interrupt_input is 0,
4813 so get_input_pending should read the input.
4814 So this should not be needed. */
4815 /* If we are using polling for input,
4816 and we see input available, make it get read now.
4817 Otherwise it might not actually get read for a second.
4818 And on hpux, since we turn off polling in wait_reading_process_output,
4819 it might never get read at all if we don't spend much time
4820 outside of wait_reading_process_output. */
4821 if (read_kbd
&& interrupt_input
4822 && keyboard_bit_set (&Available
)
4823 && input_polling_used ())
4824 kill (getpid (), SIGALRM
);
4827 /* Check for keyboard input */
4828 /* If there is any, return immediately
4829 to give it higher priority than subprocesses */
4833 int old_timers_run
= timers_run
;
4834 struct buffer
*old_buffer
= current_buffer
;
4835 Lisp_Object old_window
= selected_window
;
4838 if (detect_input_pending_run_timers (do_display
))
4840 swallow_events (do_display
);
4841 if (detect_input_pending_run_timers (do_display
))
4845 /* If a timer has run, this might have changed buffers
4846 an alike. Make read_key_sequence aware of that. */
4847 if (timers_run
!= old_timers_run
4848 && waiting_for_user_input_p
== -1
4849 && (old_buffer
!= current_buffer
4850 || !EQ (old_window
, selected_window
)))
4851 record_asynch_buffer_change ();
4857 /* If there is unread keyboard input, also return. */
4859 && requeued_events_pending_p ())
4862 /* If we are not checking for keyboard input now,
4863 do process events (but don't run any timers).
4864 This is so that X events will be processed.
4865 Otherwise they may have to wait until polling takes place.
4866 That would causes delays in pasting selections, for example.
4868 (We used to do this only if wait_for_cell.) */
4869 if (read_kbd
== 0 && detect_input_pending ())
4871 swallow_events (do_display
);
4872 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4873 if (detect_input_pending ())
4878 /* Exit now if the cell we're waiting for became non-nil. */
4879 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4883 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4884 go read it. This can happen with X on BSD after logging out.
4885 In that case, there really is no input and no SIGIO,
4886 but select says there is input. */
4888 if (read_kbd
&& interrupt_input
4889 && keyboard_bit_set (&Available
) && ! noninteractive
)
4890 kill (getpid (), SIGIO
);
4894 got_some_input
|= nfds
> 0;
4896 /* If checking input just got us a size-change event from X,
4897 obey it now if we should. */
4898 if (read_kbd
|| ! NILP (wait_for_cell
))
4899 do_pending_window_change (0);
4901 /* Check for data from a process. */
4902 if (no_avail
|| nfds
== 0)
4905 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4907 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4908 if (FD_ISSET (channel
, &Available
)
4910 && (d
->condition
& FOR_READ
) != 0)
4911 d
->func (channel
, d
->data
, 1);
4912 if (FD_ISSET (channel
, &write_mask
)
4914 && (d
->condition
& FOR_WRITE
) != 0)
4915 d
->func (channel
, d
->data
, 0);
4918 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4920 if (FD_ISSET (channel
, &Available
)
4921 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4922 && !FD_ISSET (channel
, &non_process_wait_mask
))
4926 /* If waiting for this channel, arrange to return as
4927 soon as no more input to be processed. No more
4929 if (wait_channel
== channel
)
4935 proc
= chan_process
[channel
];
4939 /* If this is a server stream socket, accept connection. */
4940 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4942 server_accept_connection (proc
, channel
);
4946 /* Read data from the process, starting with our
4947 buffered-ahead character if we have one. */
4949 nread
= read_process_output (proc
, channel
);
4952 /* Since read_process_output can run a filter,
4953 which can call accept-process-output,
4954 don't try to read from any other processes
4955 before doing the select again. */
4956 FD_ZERO (&Available
);
4959 redisplay_preserve_echo_area (12);
4962 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4965 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4966 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4968 else if (nread
== -1 && errno
== EAGAIN
)
4972 else if (nread
== -1 && errno
== EAGAIN
)
4974 /* Note that we cannot distinguish between no input
4975 available now and a closed pipe.
4976 With luck, a closed pipe will be accompanied by
4977 subprocess termination and SIGCHLD. */
4978 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4980 #endif /* O_NDELAY */
4981 #endif /* O_NONBLOCK */
4983 /* On some OSs with ptys, when the process on one end of
4984 a pty exits, the other end gets an error reading with
4985 errno = EIO instead of getting an EOF (0 bytes read).
4986 Therefore, if we get an error reading and errno =
4987 EIO, just continue, because the child process has
4988 exited and should clean itself up soon (e.g. when we
4991 However, it has been known to happen that the SIGCHLD
4992 got lost. So raise the signal again just in case.
4994 else if (nread
== -1 && errno
== EIO
)
4996 /* Clear the descriptor now, so we only raise the
4997 signal once. Don't do this if `process' is only
4999 if (XPROCESS (proc
)->pid
!= -2)
5001 FD_CLR (channel
, &input_wait_mask
);
5002 FD_CLR (channel
, &non_keyboard_wait_mask
);
5004 kill (getpid (), SIGCHLD
);
5007 #endif /* HAVE_PTYS */
5008 /* If we can detect process termination, don't consider the process
5009 gone just because its pipe is closed. */
5011 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5016 /* Preserve status of processes already terminated. */
5017 XPROCESS (proc
)->tick
= ++process_tick
;
5018 deactivate_process (proc
);
5019 if (XPROCESS (proc
)->raw_status_new
)
5020 update_status (XPROCESS (proc
));
5021 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5022 XPROCESS (proc
)->status
5023 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5026 #ifdef NON_BLOCKING_CONNECT
5027 if (FD_ISSET (channel
, &Writeok
)
5028 && FD_ISSET (channel
, &connect_wait_mask
))
5030 struct Lisp_Process
*p
;
5032 FD_CLR (channel
, &connect_wait_mask
);
5033 FD_CLR (channel
, &write_mask
);
5034 if (--num_pending_connects
< 0)
5037 proc
= chan_process
[channel
];
5041 p
= XPROCESS (proc
);
5044 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5045 So only use it on systems where it is known to work. */
5047 socklen_t xlen
= sizeof (xerrno
);
5048 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5053 struct sockaddr pname
;
5054 int pnamelen
= sizeof (pname
);
5056 /* If connection failed, getpeername will fail. */
5058 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5060 /* Obtain connect failure code through error slippage. */
5063 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5070 p
->tick
= ++process_tick
;
5071 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
5072 deactivate_process (proc
);
5077 /* Execute the sentinel here. If we had relied on
5078 status_notify to do it later, it will read input
5079 from the process before calling the sentinel. */
5080 exec_sentinel (proc
, build_string ("open\n"));
5081 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5083 FD_SET (p
->infd
, &input_wait_mask
);
5084 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5088 #endif /* NON_BLOCKING_CONNECT */
5089 } /* end for each file descriptor */
5090 } /* end while exit conditions not met */
5092 unbind_to (count
, Qnil
);
5094 /* If calling from keyboard input, do not quit
5095 since we want to return C-g as an input character.
5096 Otherwise, do pending quit if requested. */
5099 /* Prevent input_pending from remaining set if we quit. */
5100 clear_input_pending ();
5104 return got_some_input
;
5107 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5110 read_process_output_call (Lisp_Object fun_and_args
)
5112 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5116 read_process_output_error_handler (Lisp_Object error_val
)
5118 cmd_error_internal (error_val
, "error in process filter: ");
5120 update_echo_area ();
5121 Fsleep_for (make_number (2), Qnil
);
5125 /* Read pending output from the process channel,
5126 starting with our buffered-ahead character if we have one.
5127 Yield number of decoded characters read.
5129 This function reads at most 4096 characters.
5130 If you want to read all available subprocess output,
5131 you must call it repeatedly until it returns zero.
5133 The characters read are decoded according to PROC's coding-system
5137 read_process_output (Lisp_Object proc
, register int channel
)
5139 register int nbytes
;
5141 register Lisp_Object outstream
;
5142 register struct Lisp_Process
*p
= XPROCESS (proc
);
5143 register EMACS_INT opoint
;
5144 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5145 int carryover
= p
->decoding_carryover
;
5147 int count
= SPECPDL_INDEX ();
5148 Lisp_Object odeactivate
;
5150 chars
= (char *) alloca (carryover
+ readmax
);
5152 /* See the comment above. */
5153 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5155 #ifdef DATAGRAM_SOCKETS
5156 /* We have a working select, so proc_buffered_char is always -1. */
5157 if (DATAGRAM_CHAN_P (channel
))
5159 socklen_t len
= datagram_address
[channel
].len
;
5160 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5161 0, datagram_address
[channel
].sa
, &len
);
5166 int buffered
= 0 <= proc_buffered_char
[channel
];
5169 chars
[carryover
] = proc_buffered_char
[channel
];
5170 proc_buffered_char
[channel
] = -1;
5173 if (XPROCESS (proc
)->gnutls_p
)
5174 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5175 chars
+ carryover
+ buffered
,
5176 readmax
- buffered
);
5179 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5180 readmax
- buffered
);
5181 #ifdef ADAPTIVE_READ_BUFFERING
5182 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5184 int delay
= p
->read_output_delay
;
5187 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5190 process_output_delay_count
++;
5191 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5194 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5196 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5198 process_output_delay_count
--;
5200 p
->read_output_delay
= delay
;
5203 p
->read_output_skip
= 1;
5204 process_output_skip
= 1;
5209 nbytes
+= buffered
&& nbytes
<= 0;
5212 p
->decoding_carryover
= 0;
5214 /* At this point, NBYTES holds number of bytes just received
5215 (including the one in proc_buffered_char[channel]). */
5218 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5220 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5223 /* Now set NBYTES how many bytes we must decode. */
5224 nbytes
+= carryover
;
5226 odeactivate
= Vdeactivate_mark
;
5227 /* There's no good reason to let process filters change the current
5228 buffer, and many callers of accept-process-output, sit-for, and
5229 friends don't expect current-buffer to be changed from under them. */
5230 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5232 /* Read and dispose of the process output. */
5233 outstream
= p
->filter
;
5234 if (!NILP (outstream
))
5237 int outer_running_asynch_code
= running_asynch_code
;
5238 int waiting
= waiting_for_user_input_p
;
5240 /* No need to gcpro these, because all we do with them later
5241 is test them for EQness, and none of them should be a string. */
5243 Lisp_Object obuffer
, okeymap
;
5244 XSETBUFFER (obuffer
, current_buffer
);
5245 okeymap
= BVAR (current_buffer
, keymap
);
5248 /* We inhibit quit here instead of just catching it so that
5249 hitting ^G when a filter happens to be running won't screw
5251 specbind (Qinhibit_quit
, Qt
);
5252 specbind (Qlast_nonmenu_event
, Qt
);
5254 /* In case we get recursively called,
5255 and we already saved the match data nonrecursively,
5256 save the same match data in safely recursive fashion. */
5257 if (outer_running_asynch_code
)
5260 /* Don't clobber the CURRENT match data, either! */
5261 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5262 restore_search_regs ();
5263 record_unwind_save_match_data ();
5264 Fset_match_data (tem
, Qt
);
5267 /* For speed, if a search happens within this code,
5268 save the match data in a special nonrecursive fashion. */
5269 running_asynch_code
= 1;
5271 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5272 text
= coding
->dst_object
;
5273 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5274 /* A new coding system might be found. */
5275 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5277 p
->decode_coding_system
= Vlast_coding_system_used
;
5279 /* Don't call setup_coding_system for
5280 proc_decode_coding_system[channel] here. It is done in
5281 detect_coding called via decode_coding above. */
5283 /* If a coding system for encoding is not yet decided, we set
5284 it as the same as coding-system for decoding.
5286 But, before doing that we must check if
5287 proc_encode_coding_system[p->outfd] surely points to a
5288 valid memory because p->outfd will be changed once EOF is
5289 sent to the process. */
5290 if (NILP (p
->encode_coding_system
)
5291 && proc_encode_coding_system
[p
->outfd
])
5293 p
->encode_coding_system
5294 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5295 setup_coding_system (p
->encode_coding_system
,
5296 proc_encode_coding_system
[p
->outfd
]);
5300 if (coding
->carryover_bytes
> 0)
5302 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5303 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5304 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5305 coding
->carryover_bytes
);
5306 p
->decoding_carryover
= coding
->carryover_bytes
;
5308 if (SBYTES (text
) > 0)
5309 internal_condition_case_1 (read_process_output_call
,
5311 Fcons (proc
, Fcons (text
, Qnil
))),
5312 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5313 read_process_output_error_handler
);
5315 /* If we saved the match data nonrecursively, restore it now. */
5316 restore_search_regs ();
5317 running_asynch_code
= outer_running_asynch_code
;
5319 /* Restore waiting_for_user_input_p as it was
5320 when we were called, in case the filter clobbered it. */
5321 waiting_for_user_input_p
= waiting
;
5323 #if 0 /* Call record_asynch_buffer_change unconditionally,
5324 because we might have changed minor modes or other things
5325 that affect key bindings. */
5326 if (! EQ (Fcurrent_buffer (), obuffer
)
5327 || ! EQ (current_buffer
->keymap
, okeymap
))
5329 /* But do it only if the caller is actually going to read events.
5330 Otherwise there's no need to make him wake up, and it could
5331 cause trouble (for example it would make sit_for return). */
5332 if (waiting_for_user_input_p
== -1)
5333 record_asynch_buffer_change ();
5336 /* If no filter, write into buffer if it isn't dead. */
5337 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5339 Lisp_Object old_read_only
;
5340 EMACS_INT old_begv
, old_zv
;
5341 EMACS_INT old_begv_byte
, old_zv_byte
;
5342 EMACS_INT before
, before_byte
;
5343 EMACS_INT opoint_byte
;
5347 Fset_buffer (p
->buffer
);
5349 opoint_byte
= PT_BYTE
;
5350 old_read_only
= BVAR (current_buffer
, read_only
);
5353 old_begv_byte
= BEGV_BYTE
;
5354 old_zv_byte
= ZV_BYTE
;
5356 BVAR (current_buffer
, read_only
) = Qnil
;
5358 /* Insert new output into buffer
5359 at the current end-of-output marker,
5360 thus preserving logical ordering of input and output. */
5361 if (XMARKER (p
->mark
)->buffer
)
5362 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5363 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5366 SET_PT_BOTH (ZV
, ZV_BYTE
);
5368 before_byte
= PT_BYTE
;
5370 /* If the output marker is outside of the visible region, save
5371 the restriction and widen. */
5372 if (! (BEGV
<= PT
&& PT
<= ZV
))
5375 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5376 text
= coding
->dst_object
;
5377 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5378 /* A new coding system might be found. See the comment in the
5379 similar code in the previous `if' block. */
5380 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5382 p
->decode_coding_system
= Vlast_coding_system_used
;
5383 if (NILP (p
->encode_coding_system
)
5384 && proc_encode_coding_system
[p
->outfd
])
5386 p
->encode_coding_system
5387 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5388 setup_coding_system (p
->encode_coding_system
,
5389 proc_encode_coding_system
[p
->outfd
]);
5392 if (coding
->carryover_bytes
> 0)
5394 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5395 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5396 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5397 coding
->carryover_bytes
);
5398 p
->decoding_carryover
= coding
->carryover_bytes
;
5400 /* Adjust the multibyteness of TEXT to that of the buffer. */
5401 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5402 != ! STRING_MULTIBYTE (text
))
5403 text
= (STRING_MULTIBYTE (text
)
5404 ? Fstring_as_unibyte (text
)
5405 : Fstring_to_multibyte (text
));
5406 /* Insert before markers in case we are inserting where
5407 the buffer's mark is, and the user's next command is Meta-y. */
5408 insert_from_string_before_markers (text
, 0, 0,
5409 SCHARS (text
), SBYTES (text
), 0);
5411 /* Make sure the process marker's position is valid when the
5412 process buffer is changed in the signal_after_change above.
5413 W3 is known to do that. */
5414 if (BUFFERP (p
->buffer
)
5415 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5416 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5418 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5420 update_mode_lines
++;
5422 /* Make sure opoint and the old restrictions
5423 float ahead of any new text just as point would. */
5424 if (opoint
>= before
)
5426 opoint
+= PT
- before
;
5427 opoint_byte
+= PT_BYTE
- before_byte
;
5429 if (old_begv
> before
)
5431 old_begv
+= PT
- before
;
5432 old_begv_byte
+= PT_BYTE
- before_byte
;
5434 if (old_zv
>= before
)
5436 old_zv
+= PT
- before
;
5437 old_zv_byte
+= PT_BYTE
- before_byte
;
5440 /* If the restriction isn't what it should be, set it. */
5441 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5442 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5445 BVAR (current_buffer
, read_only
) = old_read_only
;
5446 SET_PT_BOTH (opoint
, opoint_byte
);
5448 /* Handling the process output should not deactivate the mark. */
5449 Vdeactivate_mark
= odeactivate
;
5451 unbind_to (count
, Qnil
);
5455 /* Sending data to subprocess */
5457 jmp_buf send_process_frame
;
5458 Lisp_Object process_sent_to
;
5461 send_process_trap (int ignore
)
5463 SIGNAL_THREAD_CHECK (SIGPIPE
);
5464 sigunblock (sigmask (SIGPIPE
));
5465 longjmp (send_process_frame
, 1);
5468 /* Send some data to process PROC.
5469 BUF is the beginning of the data; LEN is the number of characters.
5470 OBJECT is the Lisp object that the data comes from. If OBJECT is
5471 nil or t, it means that the data comes from C string.
5473 If OBJECT is not nil, the data is encoded by PROC's coding-system
5474 for encoding before it is sent.
5476 This function can evaluate Lisp code and can garbage collect. */
5479 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5480 volatile EMACS_INT len
, volatile Lisp_Object object
)
5482 /* Use volatile to protect variables from being clobbered by longjmp. */
5483 struct Lisp_Process
*p
= XPROCESS (proc
);
5485 struct coding_system
*coding
;
5486 struct gcpro gcpro1
;
5487 void (*volatile old_sigpipe
) (int);
5491 if (p
->raw_status_new
)
5493 if (! EQ (p
->status
, Qrun
))
5494 error ("Process %s not running", SDATA (p
->name
));
5496 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5498 coding
= proc_encode_coding_system
[p
->outfd
];
5499 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5501 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5502 || (BUFFERP (object
)
5503 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5506 p
->encode_coding_system
5507 = complement_process_encoding_system (p
->encode_coding_system
);
5508 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5510 /* The coding system for encoding was changed to raw-text
5511 because we sent a unibyte text previously. Now we are
5512 sending a multibyte text, thus we must encode it by the
5513 original coding system specified for the current process.
5515 Another reason we comming here is that the coding system
5516 was just complemented and new one was returned by
5517 complement_process_encoding_system. */
5518 setup_coding_system (p
->encode_coding_system
, coding
);
5519 Vlast_coding_system_used
= p
->encode_coding_system
;
5521 coding
->src_multibyte
= 1;
5525 /* For sending a unibyte text, character code conversion should
5526 not take place but EOL conversion should. So, setup raw-text
5527 or one of the subsidiary if we have not yet done it. */
5528 if (CODING_REQUIRE_ENCODING (coding
))
5530 if (CODING_REQUIRE_FLUSHING (coding
))
5532 /* But, before changing the coding, we must flush out data. */
5533 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5534 send_process (proc
, "", 0, Qt
);
5535 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5537 setup_coding_system (raw_text_coding_system
5538 (Vlast_coding_system_used
),
5540 coding
->src_multibyte
= 0;
5543 coding
->dst_multibyte
= 0;
5545 if (CODING_REQUIRE_ENCODING (coding
))
5547 coding
->dst_object
= Qt
;
5548 if (BUFFERP (object
))
5550 EMACS_INT from_byte
, from
, to
;
5551 EMACS_INT save_pt
, save_pt_byte
;
5552 struct buffer
*cur
= current_buffer
;
5554 set_buffer_internal (XBUFFER (object
));
5555 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5557 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5558 from
= BYTE_TO_CHAR (from_byte
);
5559 to
= BYTE_TO_CHAR (from_byte
+ len
);
5560 TEMP_SET_PT_BOTH (from
, from_byte
);
5561 encode_coding_object (coding
, object
, from
, from_byte
,
5562 to
, from_byte
+ len
, Qt
);
5563 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5564 set_buffer_internal (cur
);
5566 else if (STRINGP (object
))
5568 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5569 SBYTES (object
), Qt
);
5573 coding
->dst_object
= make_unibyte_string (buf
, len
);
5574 coding
->produced
= len
;
5577 len
= coding
->produced
;
5578 object
= coding
->dst_object
;
5579 buf
= SSDATA (object
);
5582 if (pty_max_bytes
== 0)
5584 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5585 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5586 if (pty_max_bytes
< 0)
5587 pty_max_bytes
= 250;
5589 pty_max_bytes
= 250;
5591 /* Deduct one, to leave space for the eof. */
5595 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5596 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5597 when returning with longjmp despite being declared volatile. */
5598 if (!setjmp (send_process_frame
))
5600 process_sent_to
= proc
;
5603 EMACS_INT
this = len
;
5605 /* Send this batch, using one or more write calls. */
5608 int outfd
= p
->outfd
;
5609 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5610 #ifdef DATAGRAM_SOCKETS
5611 if (DATAGRAM_CHAN_P (outfd
))
5613 rv
= sendto (outfd
, buf
, this,
5614 0, datagram_address
[outfd
].sa
,
5615 datagram_address
[outfd
].len
);
5616 if (rv
< 0 && errno
== EMSGSIZE
)
5618 signal (SIGPIPE
, old_sigpipe
);
5619 report_file_error ("sending datagram",
5620 Fcons (proc
, Qnil
));
5627 if (XPROCESS (proc
)->gnutls_p
)
5628 rv
= emacs_gnutls_write (outfd
,
5633 rv
= emacs_write (outfd
, buf
, this);
5634 #ifdef ADAPTIVE_READ_BUFFERING
5635 if (p
->read_output_delay
> 0
5636 && p
->adaptive_read_buffering
== 1)
5638 p
->read_output_delay
= 0;
5639 process_output_delay_count
--;
5640 p
->read_output_skip
= 0;
5644 signal (SIGPIPE
, old_sigpipe
);
5650 || errno
== EWOULDBLOCK
5656 /* Buffer is full. Wait, accepting input;
5657 that may allow the program
5658 to finish doing output and read more. */
5662 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5663 /* A gross hack to work around a bug in FreeBSD.
5664 In the following sequence, read(2) returns
5668 write(2) 954 bytes, get EAGAIN
5669 read(2) 1024 bytes in process_read_output
5670 read(2) 11 bytes in process_read_output
5672 That is, read(2) returns more bytes than have
5673 ever been written successfully. The 1033 bytes
5674 read are the 1022 bytes written successfully
5675 after processing (for example with CRs added if
5676 the terminal is set up that way which it is
5677 here). The same bytes will be seen again in a
5678 later read(2), without the CRs. */
5680 if (errno
== EAGAIN
)
5683 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5685 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5687 /* Running filters might relocate buffers or strings.
5688 Arrange to relocate BUF. */
5689 if (BUFFERP (object
))
5690 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5691 (unsigned char *) buf
);
5692 else if (STRINGP (object
))
5693 offset
= buf
- SSDATA (object
);
5695 #ifdef EMACS_HAS_USECS
5696 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5698 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5701 if (BUFFERP (object
))
5702 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5704 else if (STRINGP (object
))
5705 buf
= offset
+ SSDATA (object
);
5710 /* This is a real error. */
5711 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5721 signal (SIGPIPE
, old_sigpipe
);
5722 proc
= process_sent_to
;
5723 p
= XPROCESS (proc
);
5724 p
->raw_status_new
= 0;
5725 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5726 p
->tick
= ++process_tick
;
5727 deactivate_process (proc
);
5728 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5734 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5736 doc
: /* Send current contents of region as input to PROCESS.
5737 PROCESS may be a process, a buffer, the name of a process or buffer, or
5738 nil, indicating the current buffer's process.
5739 Called from program, takes three arguments, PROCESS, START and END.
5740 If the region is more than 500 characters long,
5741 it is sent in several bunches. This may happen even for shorter regions.
5742 Output from processes can arrive in between bunches. */)
5743 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5746 EMACS_INT start1
, end1
;
5748 proc
= get_process (process
);
5749 validate_region (&start
, &end
);
5751 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5752 move_gap (XINT (start
));
5754 start1
= CHAR_TO_BYTE (XINT (start
));
5755 end1
= CHAR_TO_BYTE (XINT (end
));
5756 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5757 Fcurrent_buffer ());
5762 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5764 doc
: /* Send PROCESS the contents of STRING as input.
5765 PROCESS may be a process, a buffer, the name of a process or buffer, or
5766 nil, indicating the current buffer's process.
5767 If STRING is more than 500 characters long,
5768 it is sent in several bunches. This may happen even for shorter strings.
5769 Output from processes can arrive in between bunches. */)
5770 (Lisp_Object process
, Lisp_Object string
)
5773 CHECK_STRING (string
);
5774 proc
= get_process (process
);
5775 send_process (proc
, SSDATA (string
),
5776 SBYTES (string
), string
);
5780 /* Return the foreground process group for the tty/pty that
5781 the process P uses. */
5783 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5788 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5791 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5792 master side. Try the slave side. */
5793 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5797 ioctl (fd
, TIOCGPGRP
, &gid
);
5801 #endif /* defined (TIOCGPGRP ) */
5806 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5807 Sprocess_running_child_p
, 0, 1, 0,
5808 doc
: /* Return t if PROCESS has given the terminal to a child.
5809 If the operating system does not make it possible to find out,
5810 return t unconditionally. */)
5811 (Lisp_Object process
)
5813 /* Initialize in case ioctl doesn't exist or gives an error,
5814 in a way that will cause returning t. */
5817 struct Lisp_Process
*p
;
5819 proc
= get_process (process
);
5820 p
= XPROCESS (proc
);
5822 if (!EQ (p
->type
, Qreal
))
5823 error ("Process %s is not a subprocess",
5826 error ("Process %s is not active",
5829 gid
= emacs_get_tty_pgrp (p
);
5836 /* send a signal number SIGNO to PROCESS.
5837 If CURRENT_GROUP is t, that means send to the process group
5838 that currently owns the terminal being used to communicate with PROCESS.
5839 This is used for various commands in shell mode.
5840 If CURRENT_GROUP is lambda, that means send to the process group
5841 that currently owns the terminal, but only if it is NOT the shell itself.
5843 If NOMSG is zero, insert signal-announcements into process's buffers
5846 If we can, we try to signal PROCESS by sending control characters
5847 down the pty. This allows us to signal inferiors who have changed
5848 their uid, for which killpg would return an EPERM error. */
5851 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5855 register struct Lisp_Process
*p
;
5859 proc
= get_process (process
);
5860 p
= XPROCESS (proc
);
5862 if (!EQ (p
->type
, Qreal
))
5863 error ("Process %s is not a subprocess",
5866 error ("Process %s is not active",
5870 current_group
= Qnil
;
5872 /* If we are using pgrps, get a pgrp number and make it negative. */
5873 if (NILP (current_group
))
5874 /* Send the signal to the shell's process group. */
5878 #ifdef SIGNALS_VIA_CHARACTERS
5879 /* If possible, send signals to the entire pgrp
5880 by sending an input character to it. */
5883 cc_t
*sig_char
= NULL
;
5885 tcgetattr (p
->infd
, &t
);
5890 sig_char
= &t
.c_cc
[VINTR
];
5894 sig_char
= &t
.c_cc
[VQUIT
];
5898 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5899 sig_char
= &t
.c_cc
[VSWTCH
];
5901 sig_char
= &t
.c_cc
[VSUSP
];
5906 if (sig_char
&& *sig_char
!= CDISABLE
)
5908 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5911 /* If we can't send the signal with a character,
5912 fall through and send it another way. */
5914 /* The code above may fall through if it can't
5915 handle the signal. */
5916 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5919 /* Get the current pgrp using the tty itself, if we have that.
5920 Otherwise, use the pty to get the pgrp.
5921 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5922 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5923 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5924 His patch indicates that if TIOCGPGRP returns an error, then
5925 we should just assume that p->pid is also the process group id. */
5927 gid
= emacs_get_tty_pgrp (p
);
5930 /* If we can't get the information, assume
5931 the shell owns the tty. */
5934 /* It is not clear whether anything really can set GID to -1.
5935 Perhaps on some system one of those ioctls can or could do so.
5936 Or perhaps this is vestigial. */
5939 #else /* ! defined (TIOCGPGRP ) */
5940 /* Can't select pgrps on this system, so we know that
5941 the child itself heads the pgrp. */
5943 #endif /* ! defined (TIOCGPGRP ) */
5945 /* If current_group is lambda, and the shell owns the terminal,
5946 don't send any signal. */
5947 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5955 p
->raw_status_new
= 0;
5957 p
->tick
= ++process_tick
;
5960 status_notify (NULL
);
5961 redisplay_preserve_echo_area (13);
5964 #endif /* ! defined (SIGCONT) */
5968 flush_pending_output (p
->infd
);
5972 /* If we don't have process groups, send the signal to the immediate
5973 subprocess. That isn't really right, but it's better than any
5974 obvious alternative. */
5977 kill (p
->pid
, signo
);
5981 /* gid may be a pid, or minus a pgrp's number */
5983 if (!NILP (current_group
))
5985 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5986 EMACS_KILLPG (gid
, signo
);
5993 #else /* ! defined (TIOCSIGSEND) */
5994 EMACS_KILLPG (gid
, signo
);
5995 #endif /* ! defined (TIOCSIGSEND) */
5998 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5999 doc
: /* Interrupt process PROCESS.
6000 PROCESS may be a process, a buffer, or the name of a process or buffer.
6001 No arg or nil means current buffer's process.
6002 Second arg CURRENT-GROUP non-nil means send signal to
6003 the current process-group of the process's controlling terminal
6004 rather than to the process's own process group.
6005 If the process is a shell, this means interrupt current subjob
6006 rather than the shell.
6008 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6009 don't send the signal. */)
6010 (Lisp_Object process
, Lisp_Object current_group
)
6012 process_send_signal (process
, SIGINT
, current_group
, 0);
6016 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6017 doc
: /* Kill process PROCESS. May be process or name of one.
6018 See function `interrupt-process' for more details on usage. */)
6019 (Lisp_Object process
, Lisp_Object current_group
)
6021 process_send_signal (process
, SIGKILL
, current_group
, 0);
6025 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6026 doc
: /* Send QUIT signal to 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
, SIGQUIT
, current_group
, 0);
6034 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6035 doc
: /* Stop process PROCESS. May be process or name of one.
6036 See function `interrupt-process' for more details on usage.
6037 If PROCESS is a network or serial process, inhibit handling of incoming
6039 (Lisp_Object process
, Lisp_Object current_group
)
6041 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6043 struct Lisp_Process
*p
;
6045 p
= XPROCESS (process
);
6046 if (NILP (p
->command
)
6049 FD_CLR (p
->infd
, &input_wait_mask
);
6050 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6056 error ("No SIGTSTP support");
6058 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6063 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6064 doc
: /* Continue process PROCESS. May be process or name of one.
6065 See function `interrupt-process' for more details on usage.
6066 If PROCESS is a network or serial process, resume handling of incoming
6068 (Lisp_Object process
, Lisp_Object current_group
)
6070 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6072 struct Lisp_Process
*p
;
6074 p
= XPROCESS (process
);
6075 if (EQ (p
->command
, Qt
)
6077 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6079 FD_SET (p
->infd
, &input_wait_mask
);
6080 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6082 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6083 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6084 #else /* not WINDOWSNT */
6085 tcflush (p
->infd
, TCIFLUSH
);
6086 #endif /* not WINDOWSNT */
6092 process_send_signal (process
, SIGCONT
, current_group
, 0);
6094 error ("No SIGCONT support");
6099 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6100 2, 2, "sProcess (name or number): \nnSignal code: ",
6101 doc
: /* Send PROCESS the signal with code SIGCODE.
6102 PROCESS may also be a number specifying the process id of the
6103 process to signal; in this case, the process need not be a child of
6105 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6106 (Lisp_Object process
, Lisp_Object sigcode
)
6110 if (INTEGERP (process
))
6112 pid
= XINT (process
);
6116 if (FLOATP (process
))
6118 pid
= (pid_t
) XFLOAT_DATA (process
);
6122 if (STRINGP (process
))
6125 if (tem
= Fget_process (process
), NILP (tem
))
6127 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6134 process
= get_process (process
);
6139 CHECK_PROCESS (process
);
6140 pid
= XPROCESS (process
)->pid
;
6142 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6146 #define parse_signal(NAME, VALUE) \
6147 else if (!xstrcasecmp (name, NAME)) \
6148 XSETINT (sigcode, VALUE)
6150 if (INTEGERP (sigcode
))
6156 CHECK_SYMBOL (sigcode
);
6157 name
= SSDATA (SYMBOL_NAME (sigcode
));
6159 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6165 parse_signal ("usr1", SIGUSR1
);
6168 parse_signal ("usr2", SIGUSR2
);
6171 parse_signal ("term", SIGTERM
);
6174 parse_signal ("hup", SIGHUP
);
6177 parse_signal ("int", SIGINT
);
6180 parse_signal ("quit", SIGQUIT
);
6183 parse_signal ("ill", SIGILL
);
6186 parse_signal ("abrt", SIGABRT
);
6189 parse_signal ("emt", SIGEMT
);
6192 parse_signal ("kill", SIGKILL
);
6195 parse_signal ("fpe", SIGFPE
);
6198 parse_signal ("bus", SIGBUS
);
6201 parse_signal ("segv", SIGSEGV
);
6204 parse_signal ("sys", SIGSYS
);
6207 parse_signal ("pipe", SIGPIPE
);
6210 parse_signal ("alrm", SIGALRM
);
6213 parse_signal ("urg", SIGURG
);
6216 parse_signal ("stop", SIGSTOP
);
6219 parse_signal ("tstp", SIGTSTP
);
6222 parse_signal ("cont", SIGCONT
);
6225 parse_signal ("chld", SIGCHLD
);
6228 parse_signal ("ttin", SIGTTIN
);
6231 parse_signal ("ttou", SIGTTOU
);
6234 parse_signal ("io", SIGIO
);
6237 parse_signal ("xcpu", SIGXCPU
);
6240 parse_signal ("xfsz", SIGXFSZ
);
6243 parse_signal ("vtalrm", SIGVTALRM
);
6246 parse_signal ("prof", SIGPROF
);
6249 parse_signal ("winch", SIGWINCH
);
6252 parse_signal ("info", SIGINFO
);
6255 error ("Undefined signal name %s", name
);
6260 return make_number (kill (pid
, XINT (sigcode
)));
6263 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6264 doc
: /* Make PROCESS see end-of-file in its input.
6265 EOF comes after any text already sent to it.
6266 PROCESS may be a process, a buffer, the name of a process or buffer, or
6267 nil, indicating the current buffer's process.
6268 If PROCESS is a network connection, or is a process communicating
6269 through a pipe (as opposed to a pty), then you cannot send any more
6270 text to PROCESS after you call this function.
6271 If PROCESS is a serial process, wait until all output written to the
6272 process has been transmitted to the serial port. */)
6273 (Lisp_Object process
)
6276 struct coding_system
*coding
;
6278 if (DATAGRAM_CONN_P (process
))
6281 proc
= get_process (process
);
6282 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6284 /* Make sure the process is really alive. */
6285 if (XPROCESS (proc
)->raw_status_new
)
6286 update_status (XPROCESS (proc
));
6287 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6288 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6290 if (CODING_REQUIRE_FLUSHING (coding
))
6292 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6293 send_process (proc
, "", 0, Qnil
);
6296 if (XPROCESS (proc
)->pty_flag
)
6297 send_process (proc
, "\004", 1, Qnil
);
6298 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6301 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6302 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6303 #endif /* not WINDOWSNT */
6304 /* Do nothing on Windows because writes are blocking. */
6308 int old_outfd
, new_outfd
;
6310 #ifdef HAVE_SHUTDOWN
6311 /* If this is a network connection, or socketpair is used
6312 for communication with the subprocess, call shutdown to cause EOF.
6313 (In some old system, shutdown to socketpair doesn't work.
6314 Then we just can't win.) */
6315 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6316 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6317 shutdown (XPROCESS (proc
)->outfd
, 1);
6318 /* In case of socketpair, outfd == infd, so don't close it. */
6319 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6320 emacs_close (XPROCESS (proc
)->outfd
);
6321 #else /* not HAVE_SHUTDOWN */
6322 emacs_close (XPROCESS (proc
)->outfd
);
6323 #endif /* not HAVE_SHUTDOWN */
6324 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6327 old_outfd
= XPROCESS (proc
)->outfd
;
6329 if (!proc_encode_coding_system
[new_outfd
])
6330 proc_encode_coding_system
[new_outfd
]
6331 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6332 memcpy (proc_encode_coding_system
[new_outfd
],
6333 proc_encode_coding_system
[old_outfd
],
6334 sizeof (struct coding_system
));
6335 memset (proc_encode_coding_system
[old_outfd
], 0,
6336 sizeof (struct coding_system
));
6338 XPROCESS (proc
)->outfd
= new_outfd
;
6343 /* On receipt of a signal that a child status has changed, loop asking
6344 about children with changed statuses until the system says there
6347 All we do is change the status; we do not run sentinels or print
6348 notifications. That is saved for the next time keyboard input is
6349 done, in order to avoid timing errors.
6351 ** WARNING: this can be called during garbage collection.
6352 Therefore, it must not be fooled by the presence of mark bits in
6355 ** USG WARNING: Although it is not obvious from the documentation
6356 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6357 signal() before executing at least one wait(), otherwise the
6358 handler will be called again, resulting in an infinite loop. The
6359 relevant portion of the documentation reads "SIGCLD signals will be
6360 queued and the signal-catching function will be continually
6361 reentered until the queue is empty". Invoking signal() causes the
6362 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6365 ** Malloc WARNING: This should never call malloc either directly or
6366 indirectly; if it does, that is a bug */
6370 sigchld_handler (int signo
)
6372 int old_errno
= errno
;
6374 struct Lisp_Process
*p
;
6376 SIGNAL_THREAD_CHECK (signo
);
6387 #endif /* no WUNTRACED */
6388 /* Keep trying to get a status until we get a definitive result. */
6392 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6394 while (pid
< 0 && errno
== EINTR
);
6398 /* PID == 0 means no processes found, PID == -1 means a real
6399 failure. We have done all our job, so return. */
6406 #endif /* no WNOHANG */
6408 /* Find the process that signaled us, and record its status. */
6410 /* The process can have been deleted by Fdelete_process. */
6411 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6413 Lisp_Object xpid
= XCAR (tail
);
6414 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6415 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6417 XSETCAR (tail
, Qnil
);
6418 goto sigchld_end_of_loop
;
6422 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6424 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6426 proc
= XCDR (XCAR (tail
));
6427 p
= XPROCESS (proc
);
6428 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6433 /* Look for an asynchronous process whose pid hasn't been filled
6436 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6438 proc
= XCDR (XCAR (tail
));
6439 p
= XPROCESS (proc
);
6445 /* Change the status of the process that was found. */
6448 int clear_desc_flag
= 0;
6450 p
->tick
= ++process_tick
;
6452 p
->raw_status_new
= 1;
6454 /* If process has terminated, stop waiting for its output. */
6455 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6457 clear_desc_flag
= 1;
6459 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6460 if (clear_desc_flag
)
6462 FD_CLR (p
->infd
, &input_wait_mask
);
6463 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6466 /* Tell wait_reading_process_output that it needs to wake up and
6468 if (input_available_clear_time
)
6469 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6472 /* There was no asynchronous process found for that pid: we have
6473 a synchronous process. */
6476 synch_process_alive
= 0;
6478 /* Report the status of the synchronous process. */
6480 synch_process_retcode
= WRETCODE (w
);
6481 else if (WIFSIGNALED (w
))
6482 synch_process_termsig
= WTERMSIG (w
);
6484 /* Tell wait_reading_process_output that it needs to wake up and
6486 if (input_available_clear_time
)
6487 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6490 sigchld_end_of_loop
:
6493 /* On some systems, we must return right away.
6494 If any more processes want to signal us, we will
6496 Otherwise (on systems that have WNOHANG), loop around
6497 to use up all the processes that have something to tell us. */
6498 #if (defined WINDOWSNT \
6499 || (defined USG && !defined GNU_LINUX \
6500 && !(defined HPUX && defined WNOHANG)))
6503 #endif /* USG, but not HPUX with WNOHANG */
6506 #endif /* SIGCHLD */
6510 exec_sentinel_unwind (Lisp_Object data
)
6512 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6517 exec_sentinel_error_handler (Lisp_Object error_val
)
6519 cmd_error_internal (error_val
, "error in process sentinel: ");
6521 update_echo_area ();
6522 Fsleep_for (make_number (2), Qnil
);
6527 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6529 Lisp_Object sentinel
, odeactivate
;
6530 register struct Lisp_Process
*p
= XPROCESS (proc
);
6531 int count
= SPECPDL_INDEX ();
6532 int outer_running_asynch_code
= running_asynch_code
;
6533 int waiting
= waiting_for_user_input_p
;
6535 if (inhibit_sentinels
)
6538 /* No need to gcpro these, because all we do with them later
6539 is test them for EQness, and none of them should be a string. */
6540 odeactivate
= Vdeactivate_mark
;
6542 Lisp_Object obuffer
, okeymap
;
6543 XSETBUFFER (obuffer
, current_buffer
);
6544 okeymap
= BVAR (current_buffer
, keymap
);
6547 /* There's no good reason to let sentinels change the current
6548 buffer, and many callers of accept-process-output, sit-for, and
6549 friends don't expect current-buffer to be changed from under them. */
6550 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6552 sentinel
= p
->sentinel
;
6553 if (NILP (sentinel
))
6556 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6557 assure that it gets restored no matter how the sentinel exits. */
6559 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6560 /* Inhibit quit so that random quits don't screw up a running filter. */
6561 specbind (Qinhibit_quit
, Qt
);
6562 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6564 /* In case we get recursively called,
6565 and we already saved the match data nonrecursively,
6566 save the same match data in safely recursive fashion. */
6567 if (outer_running_asynch_code
)
6570 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6571 restore_search_regs ();
6572 record_unwind_save_match_data ();
6573 Fset_match_data (tem
, Qt
);
6576 /* For speed, if a search happens within this code,
6577 save the match data in a special nonrecursive fashion. */
6578 running_asynch_code
= 1;
6580 internal_condition_case_1 (read_process_output_call
,
6582 Fcons (proc
, Fcons (reason
, Qnil
))),
6583 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6584 exec_sentinel_error_handler
);
6586 /* If we saved the match data nonrecursively, restore it now. */
6587 restore_search_regs ();
6588 running_asynch_code
= outer_running_asynch_code
;
6590 Vdeactivate_mark
= odeactivate
;
6592 /* Restore waiting_for_user_input_p as it was
6593 when we were called, in case the filter clobbered it. */
6594 waiting_for_user_input_p
= waiting
;
6597 if (! EQ (Fcurrent_buffer (), obuffer
)
6598 || ! EQ (current_buffer
->keymap
, okeymap
))
6600 /* But do it only if the caller is actually going to read events.
6601 Otherwise there's no need to make him wake up, and it could
6602 cause trouble (for example it would make sit_for return). */
6603 if (waiting_for_user_input_p
== -1)
6604 record_asynch_buffer_change ();
6606 unbind_to (count
, Qnil
);
6609 /* Report all recent events of a change in process status
6610 (either run the sentinel or output a message).
6611 This is usually done while Emacs is waiting for keyboard input
6612 but can be done at other times. */
6615 status_notify (struct Lisp_Process
*deleting_process
)
6617 register Lisp_Object proc
, buffer
;
6618 Lisp_Object tail
, msg
;
6619 struct gcpro gcpro1
, gcpro2
;
6623 /* We need to gcpro tail; if read_process_output calls a filter
6624 which deletes a process and removes the cons to which tail points
6625 from Vprocess_alist, and then causes a GC, tail is an unprotected
6629 /* Set this now, so that if new processes are created by sentinels
6630 that we run, we get called again to handle their status changes. */
6631 update_tick
= process_tick
;
6633 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6636 register struct Lisp_Process
*p
;
6638 proc
= Fcdr (XCAR (tail
));
6639 p
= XPROCESS (proc
);
6641 if (p
->tick
!= p
->update_tick
)
6643 p
->update_tick
= p
->tick
;
6645 /* If process is still active, read any output that remains. */
6646 while (! EQ (p
->filter
, Qt
)
6647 && ! EQ (p
->status
, Qconnect
)
6648 && ! EQ (p
->status
, Qlisten
)
6649 /* Network or serial process not stopped: */
6650 && ! EQ (p
->command
, Qt
)
6652 && p
!= deleting_process
6653 && read_process_output (proc
, p
->infd
) > 0);
6657 /* Get the text to use for the message. */
6658 if (p
->raw_status_new
)
6660 msg
= status_message (p
);
6662 /* If process is terminated, deactivate it or delete it. */
6664 if (CONSP (p
->status
))
6665 symbol
= XCAR (p
->status
);
6667 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6668 || EQ (symbol
, Qclosed
))
6670 if (delete_exited_processes
)
6671 remove_process (proc
);
6673 deactivate_process (proc
);
6676 /* The actions above may have further incremented p->tick.
6677 So set p->update_tick again
6678 so that an error in the sentinel will not cause
6679 this code to be run again. */
6680 p
->update_tick
= p
->tick
;
6681 /* Now output the message suitably. */
6682 if (!NILP (p
->sentinel
))
6683 exec_sentinel (proc
, msg
);
6684 /* Don't bother with a message in the buffer
6685 when a process becomes runnable. */
6686 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6689 struct buffer
*old
= current_buffer
;
6690 EMACS_INT opoint
, opoint_byte
;
6691 EMACS_INT before
, before_byte
;
6693 /* Avoid error if buffer is deleted
6694 (probably that's why the process is dead, too) */
6695 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6697 Fset_buffer (buffer
);
6700 opoint_byte
= PT_BYTE
;
6701 /* Insert new output into buffer
6702 at the current end-of-output marker,
6703 thus preserving logical ordering of input and output. */
6704 if (XMARKER (p
->mark
)->buffer
)
6705 Fgoto_char (p
->mark
);
6707 SET_PT_BOTH (ZV
, ZV_BYTE
);
6710 before_byte
= PT_BYTE
;
6712 tem
= BVAR (current_buffer
, read_only
);
6713 BVAR (current_buffer
, read_only
) = Qnil
;
6714 insert_string ("\nProcess ");
6715 Finsert (1, &p
->name
);
6716 insert_string (" ");
6718 BVAR (current_buffer
, read_only
) = tem
;
6719 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6721 if (opoint
>= before
)
6722 SET_PT_BOTH (opoint
+ (PT
- before
),
6723 opoint_byte
+ (PT_BYTE
- before_byte
));
6725 SET_PT_BOTH (opoint
, opoint_byte
);
6727 set_buffer_internal (old
);
6732 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6737 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6738 Sset_process_coding_system
, 1, 3, 0,
6739 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6740 DECODING will be used to decode subprocess output and ENCODING to
6741 encode subprocess input. */)
6742 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6744 register struct Lisp_Process
*p
;
6746 CHECK_PROCESS (process
);
6747 p
= XPROCESS (process
);
6749 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6751 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6752 Fcheck_coding_system (decoding
);
6753 Fcheck_coding_system (encoding
);
6754 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6755 p
->decode_coding_system
= decoding
;
6756 p
->encode_coding_system
= encoding
;
6757 setup_process_coding_systems (process
);
6762 DEFUN ("process-coding-system",
6763 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6764 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6765 (register Lisp_Object process
)
6767 CHECK_PROCESS (process
);
6768 return Fcons (XPROCESS (process
)->decode_coding_system
,
6769 XPROCESS (process
)->encode_coding_system
);
6772 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6773 Sset_process_filter_multibyte
, 2, 2, 0,
6774 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6775 If FLAG is non-nil, the filter is given multibyte strings.
6776 If FLAG is nil, the filter is given unibyte strings. In this case,
6777 all character code conversion except for end-of-line conversion is
6779 (Lisp_Object process
, Lisp_Object flag
)
6781 register struct Lisp_Process
*p
;
6783 CHECK_PROCESS (process
);
6784 p
= XPROCESS (process
);
6786 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6787 setup_process_coding_systems (process
);
6792 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6793 Sprocess_filter_multibyte_p
, 1, 1, 0,
6794 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6795 (Lisp_Object process
)
6797 register struct Lisp_Process
*p
;
6798 struct coding_system
*coding
;
6800 CHECK_PROCESS (process
);
6801 p
= XPROCESS (process
);
6802 coding
= proc_decode_coding_system
[p
->infd
];
6803 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6810 add_gpm_wait_descriptor (int desc
)
6812 add_keyboard_wait_descriptor (desc
);
6816 delete_gpm_wait_descriptor (int desc
)
6818 delete_keyboard_wait_descriptor (desc
);
6821 /* Return nonzero if *MASK has a bit set
6822 that corresponds to one of the keyboard input descriptors. */
6825 keyboard_bit_set (fd_set
*mask
)
6829 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6830 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6831 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6837 #else /* not subprocesses */
6839 /* Defined on msdos.c. */
6840 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6843 /* Implementation of wait_reading_process_output, assuming that there
6844 are no subprocesses. Used only by the MS-DOS build.
6846 Wait for timeout to elapse and/or keyboard input to be available.
6849 timeout in seconds, or
6850 zero for no limit, or
6851 -1 means gobble data immediately available but don't wait for any.
6853 read_kbd is a Lisp_Object:
6854 0 to ignore keyboard input, or
6855 1 to return when input is available, or
6856 -1 means caller will actually read the input, so don't throw to
6859 see full version for other parameters. We know that wait_proc will
6860 always be NULL, since `subprocesses' isn't defined.
6862 do_display != 0 means redisplay should be done to show subprocess
6863 output that arrives.
6865 Return true if we received input from any process. */
6868 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6870 Lisp_Object wait_for_cell
,
6871 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6874 EMACS_TIME end_time
, timeout
;
6875 SELECT_TYPE waitchannels
;
6878 /* What does time_limit really mean? */
6879 if (time_limit
|| microsecs
)
6881 EMACS_GET_TIME (end_time
);
6882 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6883 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6886 /* Turn off periodic alarms (in case they are in use)
6887 and then turn off any other atimers,
6888 because the select emulator uses alarms. */
6890 turn_on_atimers (0);
6894 int timeout_reduced_for_timers
= 0;
6896 /* If calling from keyboard input, do not quit
6897 since we want to return C-g as an input character.
6898 Otherwise, do pending quit if requested. */
6902 /* Exit now if the cell we're waiting for became non-nil. */
6903 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6906 /* Compute time from now till when time limit is up */
6907 /* Exit if already run out */
6908 if (time_limit
== -1)
6910 /* -1 specified for timeout means
6911 gobble output available now
6912 but don't wait at all. */
6914 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6916 else if (time_limit
|| microsecs
)
6918 EMACS_GET_TIME (timeout
);
6919 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6920 if (EMACS_TIME_NEG_P (timeout
))
6925 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6928 /* If our caller will not immediately handle keyboard events,
6929 run timer events directly.
6930 (Callers that will immediately read keyboard events
6931 call timer_delay on their own.) */
6932 if (NILP (wait_for_cell
))
6934 EMACS_TIME timer_delay
;
6938 int old_timers_run
= timers_run
;
6939 timer_delay
= timer_check ();
6940 if (timers_run
!= old_timers_run
&& do_display
)
6941 /* We must retry, since a timer may have requeued itself
6942 and that could alter the time delay. */
6943 redisplay_preserve_echo_area (14);
6947 while (!detect_input_pending ());
6949 /* If there is unread keyboard input, also return. */
6951 && requeued_events_pending_p ())
6954 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6956 EMACS_TIME difference
;
6957 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6958 if (EMACS_TIME_NEG_P (difference
))
6960 timeout
= timer_delay
;
6961 timeout_reduced_for_timers
= 1;
6966 /* Cause C-g and alarm signals to take immediate action,
6967 and cause input available signals to zero out timeout. */
6969 set_waiting_for_input (&timeout
);
6971 /* Wait till there is something to do. */
6973 if (! read_kbd
&& NILP (wait_for_cell
))
6974 FD_ZERO (&waitchannels
);
6976 FD_SET (0, &waitchannels
);
6978 /* If a frame has been newly mapped and needs updating,
6979 reprocess its display stuff. */
6980 if (frame_garbaged
&& do_display
)
6982 clear_waiting_for_input ();
6983 redisplay_preserve_echo_area (15);
6985 set_waiting_for_input (&timeout
);
6988 if (read_kbd
&& detect_input_pending ())
6991 FD_ZERO (&waitchannels
);
6994 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6999 /* Make C-g and alarm signals set flags again */
7000 clear_waiting_for_input ();
7002 /* If we woke up due to SIGWINCH, actually change size now. */
7003 do_pending_window_change (0);
7005 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7006 /* We waited the full specified time, so return now. */
7011 /* If the system call was interrupted, then go around the
7013 if (xerrno
== EINTR
)
7014 FD_ZERO (&waitchannels
);
7016 error ("select error: %s", emacs_strerror (xerrno
));
7019 /* Check for keyboard input */
7022 && detect_input_pending_run_timers (do_display
))
7024 swallow_events (do_display
);
7025 if (detect_input_pending_run_timers (do_display
))
7029 /* If there is unread keyboard input, also return. */
7031 && requeued_events_pending_p ())
7034 /* If wait_for_cell. check for keyboard input
7035 but don't run any timers.
7036 ??? (It seems wrong to me to check for keyboard
7037 input at all when wait_for_cell, but the code
7038 has been this way since July 1994.
7039 Try changing this after version 19.31.) */
7040 if (! NILP (wait_for_cell
)
7041 && detect_input_pending ())
7043 swallow_events (do_display
);
7044 if (detect_input_pending ())
7048 /* Exit now if the cell we're waiting for became non-nil. */
7049 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7058 #endif /* not subprocesses */
7060 /* The following functions are needed even if async subprocesses are
7061 not supported. Some of them are no-op stubs in that case. */
7063 /* Add DESC to the set of keyboard input descriptors. */
7066 add_keyboard_wait_descriptor (int desc
)
7068 #ifdef subprocesses /* actually means "not MSDOS" */
7069 FD_SET (desc
, &input_wait_mask
);
7070 FD_SET (desc
, &non_process_wait_mask
);
7071 if (desc
> max_input_desc
)
7072 max_input_desc
= desc
;
7076 /* From now on, do not expect DESC to give keyboard input. */
7079 delete_keyboard_wait_descriptor (int desc
)
7083 int lim
= max_input_desc
;
7085 FD_CLR (desc
, &input_wait_mask
);
7086 FD_CLR (desc
, &non_process_wait_mask
);
7088 if (desc
== max_input_desc
)
7089 for (fd
= 0; fd
< lim
; fd
++)
7090 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7091 max_input_desc
= fd
;
7095 /* Setup coding systems of PROCESS. */
7098 setup_process_coding_systems (Lisp_Object process
)
7101 struct Lisp_Process
*p
= XPROCESS (process
);
7103 int outch
= p
->outfd
;
7104 Lisp_Object coding_system
;
7106 if (inch
< 0 || outch
< 0)
7109 if (!proc_decode_coding_system
[inch
])
7110 proc_decode_coding_system
[inch
]
7111 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7112 coding_system
= p
->decode_coding_system
;
7113 if (! NILP (p
->filter
))
7115 else if (BUFFERP (p
->buffer
))
7117 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7118 coding_system
= raw_text_coding_system (coding_system
);
7120 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7122 if (!proc_encode_coding_system
[outch
])
7123 proc_encode_coding_system
[outch
]
7124 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7125 setup_coding_system (p
->encode_coding_system
,
7126 proc_encode_coding_system
[outch
]);
7130 /* Close all descriptors currently in use for communication
7131 with subprocess. This is used in a newly-forked subprocess
7132 to get rid of irrelevant descriptors. */
7135 close_process_descs (void)
7139 for (i
= 0; i
< MAXDESC
; i
++)
7141 Lisp_Object process
;
7142 process
= chan_process
[i
];
7143 if (!NILP (process
))
7145 int in
= XPROCESS (process
)->infd
;
7146 int out
= XPROCESS (process
)->outfd
;
7149 if (out
>= 0 && in
!= out
)
7156 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7157 doc
: /* Return the (or a) process associated with BUFFER.
7158 BUFFER may be a buffer or the name of one. */)
7159 (register Lisp_Object buffer
)
7162 register Lisp_Object buf
, tail
, proc
;
7164 if (NILP (buffer
)) return Qnil
;
7165 buf
= Fget_buffer (buffer
);
7166 if (NILP (buf
)) return Qnil
;
7168 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7170 proc
= Fcdr (XCAR (tail
));
7171 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7174 #endif /* subprocesses */
7178 DEFUN ("process-inherit-coding-system-flag",
7179 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7181 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7182 If this flag is t, `buffer-file-coding-system' of the buffer
7183 associated with PROCESS will inherit the coding system used to decode
7184 the process output. */)
7185 (register Lisp_Object process
)
7188 CHECK_PROCESS (process
);
7189 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7191 /* Ignore the argument and return the value of
7192 inherit-process-coding-system. */
7193 return inherit_process_coding_system
? Qt
: Qnil
;
7197 /* Kill all processes associated with `buffer'.
7198 If `buffer' is nil, kill all processes */
7201 kill_buffer_processes (Lisp_Object buffer
)
7204 Lisp_Object tail
, proc
;
7206 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7208 proc
= XCDR (XCAR (tail
));
7210 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7212 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7213 Fdelete_process (proc
);
7214 else if (XPROCESS (proc
)->infd
>= 0)
7215 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7218 #else /* subprocesses */
7219 /* Since we have no subprocesses, this does nothing. */
7220 #endif /* subprocesses */
7223 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
7225 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7226 This is intended for use by asynchronous process output filters and sentinels. */)
7230 return (waiting_for_user_input_p
? Qt
: Qnil
);
7236 /* Stop reading input from keyboard sources. */
7239 hold_keyboard_input (void)
7244 /* Resume reading input from keyboard sources. */
7247 unhold_keyboard_input (void)
7252 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7255 kbd_on_hold_p (void)
7257 return kbd_is_on_hold
;
7261 /* Enumeration of and access to system processes a-la ps(1). */
7263 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7265 doc
: /* Return a list of numerical process IDs of all running processes.
7266 If this functionality is unsupported, return nil.
7268 See `process-attributes' for getting attributes of a process given its ID. */)
7271 return list_system_processes ();
7274 DEFUN ("process-attributes", Fprocess_attributes
,
7275 Sprocess_attributes
, 1, 1, 0,
7276 doc
: /* Return attributes of the process given by its PID, a number.
7278 Value is an alist where each element is a cons cell of the form
7282 If this functionality is unsupported, the value is nil.
7284 See `list-system-processes' for getting a list of all process IDs.
7286 The KEYs of the attributes that this function may return are listed
7287 below, together with the type of the associated VALUE (in parentheses).
7288 Not all platforms support all of these attributes; unsupported
7289 attributes will not appear in the returned alist.
7290 Unless explicitly indicated otherwise, numbers can have either
7291 integer or floating point values.
7293 euid -- Effective user User ID of the process (number)
7294 user -- User name corresponding to euid (string)
7295 egid -- Effective user Group ID of the process (number)
7296 group -- Group name corresponding to egid (string)
7297 comm -- Command name (executable name only) (string)
7298 state -- Process state code, such as "S", "R", or "T" (string)
7299 ppid -- Parent process ID (number)
7300 pgrp -- Process group ID (number)
7301 sess -- Session ID, i.e. process ID of session leader (number)
7302 ttname -- Controlling tty name (string)
7303 tpgid -- ID of foreground process group on the process's tty (number)
7304 minflt -- number of minor page faults (number)
7305 majflt -- number of major page faults (number)
7306 cminflt -- cumulative number of minor page faults (number)
7307 cmajflt -- cumulative number of major page faults (number)
7308 utime -- user time used by the process, in the (HIGH LOW USEC) format
7309 stime -- system time used by the process, in the (HIGH LOW USEC) format
7310 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7311 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7312 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7313 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7314 pri -- priority of the process (number)
7315 nice -- nice value of the process (number)
7316 thcount -- process thread count (number)
7317 start -- time the process started, in the (HIGH LOW USEC) format
7318 vsize -- virtual memory size of the process in KB's (number)
7319 rss -- resident set size of the process in KB's (number)
7320 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7321 pcpu -- percents of CPU time used by the process (floating-point number)
7322 pmem -- percents of total physical memory used by process's resident set
7323 (floating-point number)
7324 args -- command line which invoked the process (string). */)
7327 return system_process_attributes (pid
);
7337 inhibit_sentinels
= 0;
7341 if (! noninteractive
|| initialized
)
7343 signal (SIGCHLD
, sigchld_handler
);
7346 FD_ZERO (&input_wait_mask
);
7347 FD_ZERO (&non_keyboard_wait_mask
);
7348 FD_ZERO (&non_process_wait_mask
);
7349 FD_ZERO (&write_mask
);
7350 max_process_desc
= 0;
7351 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7353 #ifdef NON_BLOCKING_CONNECT
7354 FD_ZERO (&connect_wait_mask
);
7355 num_pending_connects
= 0;
7358 #ifdef ADAPTIVE_READ_BUFFERING
7359 process_output_delay_count
= 0;
7360 process_output_skip
= 0;
7363 /* Don't do this, it caused infinite select loops. The display
7364 method should call add_keyboard_wait_descriptor on stdin if it
7367 FD_SET (0, &input_wait_mask
);
7370 Vprocess_alist
= Qnil
;
7372 deleted_pid_list
= Qnil
;
7374 for (i
= 0; i
< MAXDESC
; i
++)
7376 chan_process
[i
] = Qnil
;
7377 proc_buffered_char
[i
] = -1;
7379 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7380 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7381 #ifdef DATAGRAM_SOCKETS
7382 memset (datagram_address
, 0, sizeof datagram_address
);
7386 Lisp_Object subfeatures
= Qnil
;
7387 const struct socket_options
*sopt
;
7389 #define ADD_SUBFEATURE(key, val) \
7390 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7392 #ifdef NON_BLOCKING_CONNECT
7393 ADD_SUBFEATURE (QCnowait
, Qt
);
7395 #ifdef DATAGRAM_SOCKETS
7396 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7398 #ifdef HAVE_SEQPACKET
7399 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7401 #ifdef HAVE_LOCAL_SOCKETS
7402 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7404 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7406 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7408 #ifdef HAVE_GETSOCKNAME
7409 ADD_SUBFEATURE (QCservice
, Qt
);
7411 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7412 ADD_SUBFEATURE (QCserver
, Qt
);
7415 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7416 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7418 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7421 #if defined (DARWIN_OS)
7422 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7423 processes. As such, we only change the default value. */
7426 const char *release
= get_operating_system_release ();
7427 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7428 && release
[1] == '.')) {
7429 Vprocess_connection_type
= Qnil
;
7433 #endif /* subprocesses */
7438 syms_of_process (void)
7442 Qprocessp
= intern_c_string ("processp");
7443 staticpro (&Qprocessp
);
7444 Qrun
= intern_c_string ("run");
7446 Qstop
= intern_c_string ("stop");
7448 Qsignal
= intern_c_string ("signal");
7449 staticpro (&Qsignal
);
7451 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7454 Qexit = intern_c_string ("exit");
7455 staticpro (&Qexit); */
7457 Qopen
= intern_c_string ("open");
7459 Qclosed
= intern_c_string ("closed");
7460 staticpro (&Qclosed
);
7461 Qconnect
= intern_c_string ("connect");
7462 staticpro (&Qconnect
);
7463 Qfailed
= intern_c_string ("failed");
7464 staticpro (&Qfailed
);
7465 Qlisten
= intern_c_string ("listen");
7466 staticpro (&Qlisten
);
7467 Qlocal
= intern_c_string ("local");
7468 staticpro (&Qlocal
);
7469 Qipv4
= intern_c_string ("ipv4");
7472 Qipv6
= intern_c_string ("ipv6");
7475 Qdatagram
= intern_c_string ("datagram");
7476 staticpro (&Qdatagram
);
7477 Qseqpacket
= intern_c_string ("seqpacket");
7478 staticpro (&Qseqpacket
);
7480 QCport
= intern_c_string (":port");
7481 staticpro (&QCport
);
7482 QCspeed
= intern_c_string (":speed");
7483 staticpro (&QCspeed
);
7484 QCprocess
= intern_c_string (":process");
7485 staticpro (&QCprocess
);
7487 QCbytesize
= intern_c_string (":bytesize");
7488 staticpro (&QCbytesize
);
7489 QCstopbits
= intern_c_string (":stopbits");
7490 staticpro (&QCstopbits
);
7491 QCparity
= intern_c_string (":parity");
7492 staticpro (&QCparity
);
7493 Qodd
= intern_c_string ("odd");
7495 Qeven
= intern_c_string ("even");
7497 QCflowcontrol
= intern_c_string (":flowcontrol");
7498 staticpro (&QCflowcontrol
);
7499 Qhw
= intern_c_string ("hw");
7501 Qsw
= intern_c_string ("sw");
7503 QCsummary
= intern_c_string (":summary");
7504 staticpro (&QCsummary
);
7506 Qreal
= intern_c_string ("real");
7508 Qnetwork
= intern_c_string ("network");
7509 staticpro (&Qnetwork
);
7510 Qserial
= intern_c_string ("serial");
7511 staticpro (&Qserial
);
7512 QCbuffer
= intern_c_string (":buffer");
7513 staticpro (&QCbuffer
);
7514 QChost
= intern_c_string (":host");
7515 staticpro (&QChost
);
7516 QCservice
= intern_c_string (":service");
7517 staticpro (&QCservice
);
7518 QClocal
= intern_c_string (":local");
7519 staticpro (&QClocal
);
7520 QCremote
= intern_c_string (":remote");
7521 staticpro (&QCremote
);
7522 QCcoding
= intern_c_string (":coding");
7523 staticpro (&QCcoding
);
7524 QCserver
= intern_c_string (":server");
7525 staticpro (&QCserver
);
7526 QCnowait
= intern_c_string (":nowait");
7527 staticpro (&QCnowait
);
7528 QCsentinel
= intern_c_string (":sentinel");
7529 staticpro (&QCsentinel
);
7530 QClog
= intern_c_string (":log");
7532 QCnoquery
= intern_c_string (":noquery");
7533 staticpro (&QCnoquery
);
7534 QCstop
= intern_c_string (":stop");
7535 staticpro (&QCstop
);
7536 QCoptions
= intern_c_string (":options");
7537 staticpro (&QCoptions
);
7538 QCplist
= intern_c_string (":plist");
7539 staticpro (&QCplist
);
7541 Qlast_nonmenu_event
= intern_c_string ("last-nonmenu-event");
7542 staticpro (&Qlast_nonmenu_event
);
7544 staticpro (&Vprocess_alist
);
7546 staticpro (&deleted_pid_list
);
7549 #endif /* subprocesses */
7551 QCname
= intern_c_string (":name");
7552 staticpro (&QCname
);
7553 QCtype
= intern_c_string (":type");
7554 staticpro (&QCtype
);
7556 Qeuid
= intern_c_string ("euid");
7558 Qegid
= intern_c_string ("egid");
7560 Quser
= intern_c_string ("user");
7562 Qgroup
= intern_c_string ("group");
7563 staticpro (&Qgroup
);
7564 Qcomm
= intern_c_string ("comm");
7566 Qstate
= intern_c_string ("state");
7567 staticpro (&Qstate
);
7568 Qppid
= intern_c_string ("ppid");
7570 Qpgrp
= intern_c_string ("pgrp");
7572 Qsess
= intern_c_string ("sess");
7574 Qttname
= intern_c_string ("ttname");
7575 staticpro (&Qttname
);
7576 Qtpgid
= intern_c_string ("tpgid");
7577 staticpro (&Qtpgid
);
7578 Qminflt
= intern_c_string ("minflt");
7579 staticpro (&Qminflt
);
7580 Qmajflt
= intern_c_string ("majflt");
7581 staticpro (&Qmajflt
);
7582 Qcminflt
= intern_c_string ("cminflt");
7583 staticpro (&Qcminflt
);
7584 Qcmajflt
= intern_c_string ("cmajflt");
7585 staticpro (&Qcmajflt
);
7586 Qutime
= intern_c_string ("utime");
7587 staticpro (&Qutime
);
7588 Qstime
= intern_c_string ("stime");
7589 staticpro (&Qstime
);
7590 Qtime
= intern_c_string ("time");
7592 Qcutime
= intern_c_string ("cutime");
7593 staticpro (&Qcutime
);
7594 Qcstime
= intern_c_string ("cstime");
7595 staticpro (&Qcstime
);
7596 Qctime
= intern_c_string ("ctime");
7597 staticpro (&Qctime
);
7598 Qpri
= intern_c_string ("pri");
7600 Qnice
= intern_c_string ("nice");
7602 Qthcount
= intern_c_string ("thcount");
7603 staticpro (&Qthcount
);
7604 Qstart
= intern_c_string ("start");
7605 staticpro (&Qstart
);
7606 Qvsize
= intern_c_string ("vsize");
7607 staticpro (&Qvsize
);
7608 Qrss
= intern_c_string ("rss");
7610 Qetime
= intern_c_string ("etime");
7611 staticpro (&Qetime
);
7612 Qpcpu
= intern_c_string ("pcpu");
7614 Qpmem
= intern_c_string ("pmem");
7616 Qargs
= intern_c_string ("args");
7619 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7620 doc
: /* *Non-nil means delete processes immediately when they exit.
7621 A value of nil means don't delete them until `list-processes' is run. */);
7623 delete_exited_processes
= 1;
7626 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7627 doc
: /* Control type of device used to communicate with subprocesses.
7628 Values are nil to use a pipe, or t or `pty' to use a pty.
7629 The value has no effect if the system has no ptys or if all ptys are busy:
7630 then a pipe is used in any case.
7631 The value takes effect when `start-process' is called. */);
7632 Vprocess_connection_type
= Qt
;
7634 #ifdef ADAPTIVE_READ_BUFFERING
7635 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7636 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7637 On some systems, when Emacs reads the output from a subprocess, the output data
7638 is read in very small blocks, potentially resulting in very poor performance.
7639 This behavior can be remedied to some extent by setting this variable to a
7640 non-nil value, as it will automatically delay reading from such processes, to
7641 allow them to produce more output before Emacs tries to read it.
7642 If the value is t, the delay is reset after each write to the process; any other
7643 non-nil value means that the delay is not reset on write.
7644 The variable takes effect when `start-process' is called. */);
7645 Vprocess_adaptive_read_buffering
= Qt
;
7648 defsubr (&Sprocessp
);
7649 defsubr (&Sget_process
);
7650 defsubr (&Sdelete_process
);
7651 defsubr (&Sprocess_status
);
7652 defsubr (&Sprocess_exit_status
);
7653 defsubr (&Sprocess_id
);
7654 defsubr (&Sprocess_name
);
7655 defsubr (&Sprocess_tty_name
);
7656 defsubr (&Sprocess_command
);
7657 defsubr (&Sset_process_buffer
);
7658 defsubr (&Sprocess_buffer
);
7659 defsubr (&Sprocess_mark
);
7660 defsubr (&Sset_process_filter
);
7661 defsubr (&Sprocess_filter
);
7662 defsubr (&Sset_process_sentinel
);
7663 defsubr (&Sprocess_sentinel
);
7664 defsubr (&Sset_process_window_size
);
7665 defsubr (&Sset_process_inherit_coding_system_flag
);
7666 defsubr (&Sset_process_query_on_exit_flag
);
7667 defsubr (&Sprocess_query_on_exit_flag
);
7668 defsubr (&Sprocess_contact
);
7669 defsubr (&Sprocess_plist
);
7670 defsubr (&Sset_process_plist
);
7671 defsubr (&Slist_processes
);
7672 defsubr (&Sprocess_list
);
7673 defsubr (&Sstart_process
);
7674 defsubr (&Sserial_process_configure
);
7675 defsubr (&Smake_serial_process
);
7676 defsubr (&Sset_network_process_option
);
7677 defsubr (&Smake_network_process
);
7678 defsubr (&Sformat_network_address
);
7679 #if defined(HAVE_NET_IF_H)
7681 defsubr (&Snetwork_interface_list
);
7683 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7684 defsubr (&Snetwork_interface_info
);
7686 #endif /* defined(HAVE_NET_IF_H) */
7687 #ifdef DATAGRAM_SOCKETS
7688 defsubr (&Sprocess_datagram_address
);
7689 defsubr (&Sset_process_datagram_address
);
7691 defsubr (&Saccept_process_output
);
7692 defsubr (&Sprocess_send_region
);
7693 defsubr (&Sprocess_send_string
);
7694 defsubr (&Sinterrupt_process
);
7695 defsubr (&Skill_process
);
7696 defsubr (&Squit_process
);
7697 defsubr (&Sstop_process
);
7698 defsubr (&Scontinue_process
);
7699 defsubr (&Sprocess_running_child_p
);
7700 defsubr (&Sprocess_send_eof
);
7701 defsubr (&Ssignal_process
);
7702 defsubr (&Swaiting_for_user_input_p
);
7703 defsubr (&Sprocess_type
);
7704 defsubr (&Sset_process_coding_system
);
7705 defsubr (&Sprocess_coding_system
);
7706 defsubr (&Sset_process_filter_multibyte
);
7707 defsubr (&Sprocess_filter_multibyte_p
);
7709 #endif /* subprocesses */
7711 defsubr (&Sget_buffer_process
);
7712 defsubr (&Sprocess_inherit_coding_system_flag
);
7713 defsubr (&Slist_system_processes
);
7714 defsubr (&Sprocess_attributes
);