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
))
1349 tem
= Fcar (Fcdr (p
->status
));
1350 Fprinc (symbol
, Qnil
);
1352 else if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1354 if (EQ (symbol
, Qexit
))
1355 write_string ("closed", -1);
1356 else if (EQ (p
->command
, Qt
))
1357 write_string ("stopped", -1);
1358 else if (EQ (symbol
, Qrun
))
1359 write_string ("open", -1);
1361 Fprinc (symbol
, Qnil
);
1363 else if (SERIALCONN1_P (p
))
1365 write_string ("running", -1);
1368 Fprinc (symbol
, Qnil
);
1370 if (EQ (symbol
, Qexit
))
1373 tem
= Fcar (Fcdr (p
->status
));
1376 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1377 write_string (tembuf
, -1);
1381 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
) || EQ (symbol
, Qclosed
))
1384 Findent_to (i_buffer
, minspace
);
1385 if (NILP (p
->buffer
))
1386 insert_string ("(none)");
1387 else if (NILP (BVAR (XBUFFER (p
->buffer
), name
)))
1388 insert_string ("(Killed)");
1390 Finsert (1, &BVAR (XBUFFER (p
->buffer
), name
));
1394 Findent_to (i_tty
, minspace
);
1395 if (STRINGP (p
->tty_name
))
1396 Finsert (1, &p
->tty_name
);
1399 Findent_to (i_command
, minspace
);
1401 if (EQ (p
->status
, Qlisten
))
1403 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1404 if (INTEGERP (port
))
1405 port
= Fnumber_to_string (port
);
1407 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1408 sprintf (tembuf
, "(network %s server on %s)\n",
1409 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1410 (STRINGP (port
) ? SSDATA (port
) : "?"));
1411 insert_string (tembuf
);
1413 else if (NETCONN1_P (p
))
1415 /* For a local socket, there is no host name,
1416 so display service instead. */
1417 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1418 if (!STRINGP (host
))
1420 host
= Fplist_get (p
->childp
, QCservice
);
1421 if (INTEGERP (host
))
1422 host
= Fnumber_to_string (host
);
1425 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1426 sprintf (tembuf
, "(network %s connection to %s)\n",
1427 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1428 (STRINGP (host
) ? SSDATA (host
) : "?"));
1429 insert_string (tembuf
);
1431 else if (SERIALCONN1_P (p
))
1433 Lisp_Object port
= Fplist_get (p
->childp
, QCport
);
1434 Lisp_Object speed
= Fplist_get (p
->childp
, QCspeed
);
1435 insert_string ("(serial port ");
1437 insert_string (SSDATA (port
));
1439 insert_string ("?");
1440 if (INTEGERP (speed
))
1442 sprintf (tembuf
, " at %ld b/s", (long) XINT (speed
));
1443 insert_string (tembuf
);
1445 insert_string (")\n");
1449 Lisp_Object tem
= p
->command
;
1452 Lisp_Object tem1
= Fcar (tem
);
1459 insert_string (" ");
1461 insert_string ("\n");
1466 status_notify (NULL
);
1467 redisplay_preserve_echo_area (13);
1472 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1473 doc
: /* Display a list of all processes.
1474 If optional argument QUERY-ONLY is non-nil, only processes with
1475 the query-on-exit flag set will be listed.
1476 Any process listed as exited or signaled is actually eliminated
1477 after the listing is made. */)
1478 (Lisp_Object query_only
)
1480 internal_with_output_to_temp_buffer ("*Process List*",
1481 list_processes_1
, query_only
);
1485 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1486 doc
: /* Return a list of all processes. */)
1489 return Fmapcar (Qcdr
, Vprocess_alist
);
1492 /* Starting asynchronous inferior processes. */
1494 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1496 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1497 doc
: /* Start a program in a subprocess. Return the process object for it.
1498 NAME is name for process. It is modified if necessary to make it unique.
1499 BUFFER is the buffer (or buffer name) to associate with the process.
1501 Process output (both standard output and standard error streams) goes
1502 at end of BUFFER, unless you specify an output stream or filter
1503 function to handle the output. BUFFER may also be nil, meaning that
1504 this process is not associated with any buffer.
1506 PROGRAM is the program file name. It is searched for in PATH. If
1507 nil, just associate a pty with the buffer. Remaining arguments are
1508 strings to give program as arguments.
1510 If you want to separate standard output from standard error, invoke
1511 the command through a shell and redirect one of them using the shell
1514 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1515 (size_t nargs
, register Lisp_Object
*args
)
1517 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1518 register unsigned char **new_argv
;
1520 int count
= SPECPDL_INDEX ();
1524 buffer
= Fget_buffer_create (buffer
);
1526 /* Make sure that the child will be able to chdir to the current
1527 buffer's current directory, or its unhandled equivalent. We
1528 can't just have the child check for an error when it does the
1529 chdir, since it's in a vfork.
1531 We have to GCPRO around this because Fexpand_file_name and
1532 Funhandled_file_name_directory might call a file name handling
1533 function. The argument list is protected by the caller, so all
1534 we really have to worry about is buffer. */
1536 struct gcpro gcpro1
, gcpro2
;
1538 current_dir
= BVAR (current_buffer
, directory
);
1540 GCPRO2 (buffer
, current_dir
);
1542 current_dir
= Funhandled_file_name_directory (current_dir
);
1543 if (NILP (current_dir
))
1544 /* If the file name handler says that current_dir is unreachable, use
1545 a sensible default. */
1546 current_dir
= build_string ("~/");
1547 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1548 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1549 report_file_error ("Setting current directory",
1550 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1556 CHECK_STRING (name
);
1560 if (!NILP (program
))
1561 CHECK_STRING (program
);
1563 proc
= make_process (name
);
1564 /* If an error occurs and we can't start the process, we want to
1565 remove it from the process list. This means that each error
1566 check in create_process doesn't need to call remove_process
1567 itself; it's all taken care of here. */
1568 record_unwind_protect (start_process_unwind
, proc
);
1570 XPROCESS (proc
)->childp
= Qt
;
1571 XPROCESS (proc
)->plist
= Qnil
;
1572 XPROCESS (proc
)->type
= Qreal
;
1573 XPROCESS (proc
)->buffer
= buffer
;
1574 XPROCESS (proc
)->sentinel
= Qnil
;
1575 XPROCESS (proc
)->filter
= Qnil
;
1576 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1579 /* AKA GNUTLS_INITSTAGE(proc). */
1580 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1581 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1584 #ifdef ADAPTIVE_READ_BUFFERING
1585 XPROCESS (proc
)->adaptive_read_buffering
1586 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1587 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1590 /* Make the process marker point into the process buffer (if any). */
1591 if (BUFFERP (buffer
))
1592 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1593 BUF_ZV (XBUFFER (buffer
)),
1594 BUF_ZV_BYTE (XBUFFER (buffer
)));
1597 /* Decide coding systems for communicating with the process. Here
1598 we don't setup the structure coding_system nor pay attention to
1599 unibyte mode. They are done in create_process. */
1601 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1602 Lisp_Object coding_systems
= Qt
;
1603 Lisp_Object val
, *args2
;
1604 struct gcpro gcpro1
, gcpro2
;
1606 val
= Vcoding_system_for_read
;
1609 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1610 args2
[0] = Qstart_process
;
1611 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1612 GCPRO2 (proc
, current_dir
);
1613 if (!NILP (program
))
1614 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1616 if (CONSP (coding_systems
))
1617 val
= XCAR (coding_systems
);
1618 else if (CONSP (Vdefault_process_coding_system
))
1619 val
= XCAR (Vdefault_process_coding_system
);
1621 XPROCESS (proc
)->decode_coding_system
= val
;
1623 val
= Vcoding_system_for_write
;
1626 if (EQ (coding_systems
, Qt
))
1628 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1629 args2
[0] = Qstart_process
;
1630 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1631 GCPRO2 (proc
, current_dir
);
1632 if (!NILP (program
))
1633 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1636 if (CONSP (coding_systems
))
1637 val
= XCDR (coding_systems
);
1638 else if (CONSP (Vdefault_process_coding_system
))
1639 val
= XCDR (Vdefault_process_coding_system
);
1641 XPROCESS (proc
)->encode_coding_system
= val
;
1642 /* Note: At this momemnt, the above coding system may leave
1643 text-conversion or eol-conversion unspecified. They will be
1644 decided after we read output from the process and decode it by
1645 some coding system, or just before we actually send a text to
1650 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1651 XPROCESS (proc
)->decoding_carryover
= 0;
1652 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1654 XPROCESS (proc
)->inherit_coding_system_flag
1655 = !(NILP (buffer
) || !inherit_process_coding_system
);
1657 if (!NILP (program
))
1659 /* If program file name is not absolute, search our path for it.
1660 Put the name we will really use in TEM. */
1661 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1662 && !(SCHARS (program
) > 1
1663 && IS_DEVICE_SEP (SREF (program
, 1))))
1665 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1668 GCPRO4 (name
, program
, buffer
, current_dir
);
1669 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1672 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1673 tem
= Fexpand_file_name (tem
, Qnil
);
1677 if (!NILP (Ffile_directory_p (program
)))
1678 error ("Specified program for new process is a directory");
1682 /* If program file name starts with /: for quoting a magic name,
1684 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1685 && SREF (tem
, 1) == ':')
1686 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1689 Lisp_Object arg_encoding
= Qnil
;
1690 struct gcpro gcpro1
;
1693 /* Encode the file name and put it in NEW_ARGV.
1694 That's where the child will use it to execute the program. */
1695 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1697 /* Here we encode arguments by the coding system used for sending
1698 data to the process. We don't support using different coding
1699 systems for encoding arguments and for encoding data sent to the
1702 for (i
= 3; i
< nargs
; i
++)
1704 tem
= Fcons (args
[i
], tem
);
1705 CHECK_STRING (XCAR (tem
));
1706 if (STRING_MULTIBYTE (XCAR (tem
)))
1708 if (NILP (arg_encoding
))
1709 arg_encoding
= (complement_process_encoding_system
1710 (XPROCESS (proc
)->encode_coding_system
));
1712 code_convert_string_norecord
1713 (XCAR (tem
), arg_encoding
, 1));
1720 /* Now that everything is encoded we can collect the strings into
1722 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1723 new_argv
[nargs
- 2] = 0;
1725 for (i
= nargs
- 2; i
-- != 0; )
1727 new_argv
[i
] = SDATA (XCAR (tem
));
1731 create_process (proc
, (char **) new_argv
, current_dir
);
1736 return unbind_to (count
, proc
);
1739 /* This function is the unwind_protect form for Fstart_process. If
1740 PROC doesn't have its pid set, then we know someone has signaled
1741 an error and the process wasn't started successfully, so we should
1742 remove it from the process list. */
1744 start_process_unwind (Lisp_Object proc
)
1746 if (!PROCESSP (proc
))
1749 /* Was PROC started successfully? */
1750 if (XPROCESS (proc
)->pid
== -1)
1751 remove_process (proc
);
1757 create_process_1 (struct atimer
*timer
)
1759 /* Nothing to do. */
1764 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1766 int inchannel
, outchannel
;
1769 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1770 int wait_child_setup
[2];
1774 struct sigaction sigint_action
;
1775 struct sigaction sigquit_action
;
1776 struct sigaction sigpipe_action
;
1778 struct sigaction sighup_action
;
1780 /* Use volatile to protect variables from being clobbered by longjmp. */
1781 volatile int forkin
, forkout
;
1782 volatile int pty_flag
= 0;
1784 extern char **environ
;
1787 inchannel
= outchannel
= -1;
1790 if (!NILP (Vprocess_connection_type
))
1791 outchannel
= inchannel
= allocate_pty ();
1795 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1796 /* On most USG systems it does not work to open the pty's tty here,
1797 then close it and reopen it in the child. */
1799 /* Don't let this terminal become our controlling terminal
1800 (in case we don't have one). */
1801 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1803 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1806 report_file_error ("Opening pty", Qnil
);
1808 forkin
= forkout
= -1;
1809 #endif /* not USG, or USG_SUBTTY_WORKS */
1813 #endif /* HAVE_PTYS */
1818 report_file_error ("Creating pipe", Qnil
);
1824 emacs_close (inchannel
);
1825 emacs_close (forkout
);
1826 report_file_error ("Creating pipe", Qnil
);
1832 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1836 tem
= pipe (wait_child_setup
);
1838 report_file_error ("Creating pipe", Qnil
);
1839 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1841 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1844 emacs_close (wait_child_setup
[0]);
1845 emacs_close (wait_child_setup
[1]);
1846 report_file_error ("Setting file descriptor flags", Qnil
);
1852 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1853 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1856 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1857 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1861 /* Record this as an active process, with its channels.
1862 As a result, child_setup will close Emacs's side of the pipes. */
1863 chan_process
[inchannel
] = process
;
1864 XPROCESS (process
)->infd
= inchannel
;
1865 XPROCESS (process
)->outfd
= outchannel
;
1867 /* Previously we recorded the tty descriptor used in the subprocess.
1868 It was only used for getting the foreground tty process, so now
1869 we just reopen the device (see emacs_get_tty_pgrp) as this is
1870 more portable (see USG_SUBTTY_WORKS above). */
1872 XPROCESS (process
)->pty_flag
= pty_flag
;
1873 XPROCESS (process
)->status
= Qrun
;
1874 setup_process_coding_systems (process
);
1876 /* Delay interrupts until we have a chance to store
1877 the new fork's pid in its process structure */
1878 sigemptyset (&blocked
);
1880 sigaddset (&blocked
, SIGCHLD
);
1882 #ifdef HAVE_WORKING_VFORK
1883 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1884 this sets the parent's signal handlers as well as the child's.
1885 So delay all interrupts whose handlers the child might munge,
1886 and record the current handlers so they can be restored later. */
1887 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1888 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1889 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1891 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1893 #endif /* HAVE_WORKING_VFORK */
1894 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1896 FD_SET (inchannel
, &input_wait_mask
);
1897 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1898 if (inchannel
> max_process_desc
)
1899 max_process_desc
= inchannel
;
1901 /* Until we store the proper pid, enable sigchld_handler
1902 to recognize an unknown pid as standing for this process.
1903 It is very important not to let this `marker' value stay
1904 in the table after this function has returned; if it does
1905 it might cause call-process to hang and subsequent asynchronous
1906 processes to get their return values scrambled. */
1907 XPROCESS (process
)->pid
= -1;
1912 /* child_setup must clobber environ on systems with true vfork.
1913 Protect it from permanent change. */
1914 char **save_environ
= environ
;
1915 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1920 #endif /* not WINDOWSNT */
1922 int xforkin
= forkin
;
1923 int xforkout
= forkout
;
1925 #if 0 /* This was probably a mistake--it duplicates code later on,
1926 but fails to handle all the cases. */
1927 /* Make sure SIGCHLD is not blocked in the child. */
1928 sigsetmask (SIGEMPTYMASK
);
1931 /* Make the pty be the controlling terminal of the process. */
1933 /* First, disconnect its current controlling terminal. */
1935 /* We tried doing setsid only if pty_flag, but it caused
1936 process_set_signal to fail on SGI when using a pipe. */
1938 /* Make the pty's terminal the controlling terminal. */
1939 if (pty_flag
&& xforkin
>= 0)
1942 /* We ignore the return value
1943 because faith@cs.unc.edu says that is necessary on Linux. */
1944 ioctl (xforkin
, TIOCSCTTY
, 0);
1947 #else /* not HAVE_SETSID */
1949 /* It's very important to call setpgrp here and no time
1950 afterwards. Otherwise, we lose our controlling tty which
1951 is set when we open the pty. */
1954 #endif /* not HAVE_SETSID */
1955 #if defined (LDISC1)
1956 if (pty_flag
&& xforkin
>= 0)
1959 tcgetattr (xforkin
, &t
);
1961 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1962 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1965 #if defined (NTTYDISC) && defined (TIOCSETD)
1966 if (pty_flag
&& xforkin
>= 0)
1968 /* Use new line discipline. */
1969 int ldisc
= NTTYDISC
;
1970 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1975 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1976 can do TIOCSPGRP only to the process's controlling tty. */
1979 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1980 I can't test it since I don't have 4.3. */
1981 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1984 ioctl (j
, TIOCNOTTY
, 0);
1988 /* In order to get a controlling terminal on some versions
1989 of BSD, it is necessary to put the process in pgrp 0
1990 before it opens the terminal. */
1998 #endif /* TIOCNOTTY */
2000 #if !defined (DONT_REOPEN_PTY)
2001 /*** There is a suggestion that this ought to be a
2002 conditional on TIOCSPGRP,
2003 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2004 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2005 that system does seem to need this code, even though
2006 both HAVE_SETSID and TIOCSCTTY are defined. */
2007 /* Now close the pty (if we had it open) and reopen it.
2008 This makes the pty the controlling terminal of the subprocess. */
2012 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2015 emacs_close (xforkin
);
2016 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2020 emacs_write (1, "Couldn't open the pty terminal ", 31);
2021 emacs_write (1, pty_name
, strlen (pty_name
));
2022 emacs_write (1, "\n", 1);
2027 #endif /* not DONT_REOPEN_PTY */
2029 #ifdef SETUP_SLAVE_PTY
2034 #endif /* SETUP_SLAVE_PTY */
2036 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2037 Now reenable it in the child, so it will die when we want it to. */
2039 signal (SIGHUP
, SIG_DFL
);
2041 #endif /* HAVE_PTYS */
2043 signal (SIGINT
, SIG_DFL
);
2044 signal (SIGQUIT
, SIG_DFL
);
2045 /* GConf causes us to ignore SIGPIPE, make sure it is restored
2047 signal (SIGPIPE
, SIG_DFL
);
2049 /* Stop blocking signals in the child. */
2050 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2053 child_setup_tty (xforkout
);
2055 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2056 new_argv
, 1, encoded_current_dir
);
2057 #else /* not WINDOWSNT */
2059 emacs_close (wait_child_setup
[0]);
2061 child_setup (xforkin
, xforkout
, xforkout
,
2062 new_argv
, 1, encoded_current_dir
);
2063 #endif /* not WINDOWSNT */
2065 environ
= save_environ
;
2070 /* This runs in the Emacs process. */
2074 emacs_close (forkin
);
2075 if (forkin
!= forkout
&& forkout
>= 0)
2076 emacs_close (forkout
);
2080 /* vfork succeeded. */
2081 XPROCESS (process
)->pid
= pid
;
2084 register_child (pid
, inchannel
);
2085 #endif /* WINDOWSNT */
2087 /* If the subfork execv fails, and it exits,
2088 this close hangs. I don't know why.
2089 So have an interrupt jar it loose. */
2091 struct atimer
*timer
;
2095 EMACS_SET_SECS_USECS (offset
, 1, 0);
2096 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2099 emacs_close (forkin
);
2101 cancel_atimer (timer
);
2105 if (forkin
!= forkout
&& forkout
>= 0)
2106 emacs_close (forkout
);
2110 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2113 XPROCESS (process
)->tty_name
= Qnil
;
2115 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
2116 /* Wait for child_setup to complete in case that vfork is
2117 actually defined as fork. The descriptor wait_child_setup[1]
2118 of a pipe is closed at the child side either by close-on-exec
2119 on successful execvp or the _exit call in child_setup. */
2123 emacs_close (wait_child_setup
[1]);
2124 emacs_read (wait_child_setup
[0], &dummy
, 1);
2125 emacs_close (wait_child_setup
[0]);
2130 /* Restore the signal state whether vfork succeeded or not.
2131 (We will signal an error, below, if it failed.) */
2132 #ifdef HAVE_WORKING_VFORK
2133 /* Restore the parent's signal handlers. */
2134 sigaction (SIGINT
, &sigint_action
, 0);
2135 sigaction (SIGQUIT
, &sigquit_action
, 0);
2136 sigaction (SIGPIPE
, &sigpipe_action
, 0);
2138 sigaction (SIGHUP
, &sighup_action
, 0);
2140 #endif /* HAVE_WORKING_VFORK */
2141 /* Stop blocking signals in the parent. */
2142 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2144 /* Now generate the error if vfork failed. */
2146 report_file_error ("Doing vfork", Qnil
);
2150 create_pty (Lisp_Object process
)
2152 int inchannel
, outchannel
;
2154 /* Use volatile to protect variables from being clobbered by longjmp. */
2155 volatile int forkin
, forkout
;
2156 volatile int pty_flag
= 0;
2158 inchannel
= outchannel
= -1;
2161 if (!NILP (Vprocess_connection_type
))
2162 outchannel
= inchannel
= allocate_pty ();
2166 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
2167 /* On most USG systems it does not work to open the pty's tty here,
2168 then close it and reopen it in the child. */
2170 /* Don't let this terminal become our controlling terminal
2171 (in case we don't have one). */
2172 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2174 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
2177 report_file_error ("Opening pty", Qnil
);
2178 #if defined (DONT_REOPEN_PTY)
2179 /* In the case that vfork is defined as fork, the parent process
2180 (Emacs) may send some data before the child process completes
2181 tty options setup. So we setup tty before forking. */
2182 child_setup_tty (forkout
);
2183 #endif /* DONT_REOPEN_PTY */
2185 forkin
= forkout
= -1;
2186 #endif /* not USG, or USG_SUBTTY_WORKS */
2189 #endif /* HAVE_PTYS */
2192 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2193 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2196 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2197 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2201 /* Record this as an active process, with its channels.
2202 As a result, child_setup will close Emacs's side of the pipes. */
2203 chan_process
[inchannel
] = process
;
2204 XPROCESS (process
)->infd
= inchannel
;
2205 XPROCESS (process
)->outfd
= outchannel
;
2207 /* Previously we recorded the tty descriptor used in the subprocess.
2208 It was only used for getting the foreground tty process, so now
2209 we just reopen the device (see emacs_get_tty_pgrp) as this is
2210 more portable (see USG_SUBTTY_WORKS above). */
2212 XPROCESS (process
)->pty_flag
= pty_flag
;
2213 XPROCESS (process
)->status
= Qrun
;
2214 setup_process_coding_systems (process
);
2216 FD_SET (inchannel
, &input_wait_mask
);
2217 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2218 if (inchannel
> max_process_desc
)
2219 max_process_desc
= inchannel
;
2221 XPROCESS (process
)->pid
= -2;
2224 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2227 XPROCESS (process
)->tty_name
= Qnil
;
2231 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2232 The address family of sa is not included in the result. */
2235 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2237 Lisp_Object address
;
2240 register struct Lisp_Vector
*p
;
2242 /* Workaround for a bug in getsockname on BSD: Names bound to
2243 sockets in the UNIX domain are inaccessible; getsockname returns
2244 a zero length name. */
2245 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2246 return empty_unibyte_string
;
2248 switch (sa
->sa_family
)
2252 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2253 len
= sizeof (sin
->sin_addr
) + 1;
2254 address
= Fmake_vector (make_number (len
), Qnil
);
2255 p
= XVECTOR (address
);
2256 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2257 cp
= (unsigned char *) &sin
->sin_addr
;
2263 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2264 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2265 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2266 address
= Fmake_vector (make_number (len
), Qnil
);
2267 p
= XVECTOR (address
);
2268 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2269 for (i
= 0; i
< len
; i
++)
2270 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2274 #ifdef HAVE_LOCAL_SOCKETS
2277 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2278 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2279 if (sockun
->sun_path
[i
] == 0)
2281 return make_unibyte_string (sockun
->sun_path
, i
);
2285 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2286 address
= Fcons (make_number (sa
->sa_family
),
2287 Fmake_vector (make_number (len
), Qnil
));
2288 p
= XVECTOR (XCDR (address
));
2289 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2295 p
->contents
[i
++] = make_number (*cp
++);
2301 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2304 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2306 register struct Lisp_Vector
*p
;
2308 if (VECTORP (address
))
2310 p
= XVECTOR (address
);
2314 return sizeof (struct sockaddr_in
);
2317 else if (p
->size
== 9)
2319 *familyp
= AF_INET6
;
2320 return sizeof (struct sockaddr_in6
);
2324 #ifdef HAVE_LOCAL_SOCKETS
2325 else if (STRINGP (address
))
2327 *familyp
= AF_LOCAL
;
2328 return sizeof (struct sockaddr_un
);
2331 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2333 struct sockaddr
*sa
;
2334 *familyp
= XINT (XCAR (address
));
2335 p
= XVECTOR (XCDR (address
));
2336 return p
->size
+ sizeof (sa
->sa_family
);
2341 /* Convert an address object (vector or string) to an internal sockaddr.
2343 The address format has been basically validated by
2344 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2345 it could have come from user data. So if FAMILY is not valid,
2346 we return after zeroing *SA. */
2349 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2351 register struct Lisp_Vector
*p
;
2352 register unsigned char *cp
= NULL
;
2355 memset (sa
, 0, len
);
2357 if (VECTORP (address
))
2359 p
= XVECTOR (address
);
2360 if (family
== AF_INET
)
2362 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2363 len
= sizeof (sin
->sin_addr
) + 1;
2364 i
= XINT (p
->contents
[--len
]);
2365 sin
->sin_port
= htons (i
);
2366 cp
= (unsigned char *)&sin
->sin_addr
;
2367 sa
->sa_family
= family
;
2370 else if (family
== AF_INET6
)
2372 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2373 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2374 len
= sizeof (sin6
->sin6_addr
) + 1;
2375 i
= XINT (p
->contents
[--len
]);
2376 sin6
->sin6_port
= htons (i
);
2377 for (i
= 0; i
< len
; i
++)
2378 if (INTEGERP (p
->contents
[i
]))
2380 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2383 sa
->sa_family
= family
;
2390 else if (STRINGP (address
))
2392 #ifdef HAVE_LOCAL_SOCKETS
2393 if (family
== AF_LOCAL
)
2395 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2396 cp
= SDATA (address
);
2397 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2398 sockun
->sun_path
[i
] = *cp
++;
2399 sa
->sa_family
= family
;
2406 p
= XVECTOR (XCDR (address
));
2407 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2410 for (i
= 0; i
< len
; i
++)
2411 if (INTEGERP (p
->contents
[i
]))
2412 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2415 #ifdef DATAGRAM_SOCKETS
2416 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2418 doc
: /* Get the current datagram address associated with PROCESS. */)
2419 (Lisp_Object process
)
2423 CHECK_PROCESS (process
);
2425 if (!DATAGRAM_CONN_P (process
))
2428 channel
= XPROCESS (process
)->infd
;
2429 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2430 datagram_address
[channel
].len
);
2433 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2435 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2436 Returns nil upon error setting address, ADDRESS otherwise. */)
2437 (Lisp_Object process
, Lisp_Object address
)
2442 CHECK_PROCESS (process
);
2444 if (!DATAGRAM_CONN_P (process
))
2447 channel
= XPROCESS (process
)->infd
;
2449 len
= get_lisp_to_sockaddr_size (address
, &family
);
2450 if (datagram_address
[channel
].len
!= len
)
2452 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2458 static const struct socket_options
{
2459 /* The name of this option. Should be lowercase version of option
2460 name without SO_ prefix. */
2462 /* Option level SOL_... */
2464 /* Option number SO_... */
2466 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2467 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2468 } socket_options
[] =
2470 #ifdef SO_BINDTODEVICE
2471 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2474 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2477 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2480 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2483 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2486 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2489 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2492 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2494 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2497 /* Set option OPT to value VAL on socket S.
2499 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2500 Signals an error if setting a known option fails.
2504 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2507 const struct socket_options
*sopt
;
2512 name
= SSDATA (SYMBOL_NAME (opt
));
2513 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2514 if (strcmp (name
, sopt
->name
) == 0)
2517 switch (sopt
->opttype
)
2522 optval
= NILP (val
) ? 0 : 1;
2523 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2524 &optval
, sizeof (optval
));
2532 optval
= XINT (val
);
2534 error ("Bad option value for %s", name
);
2535 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2536 &optval
, sizeof (optval
));
2540 #ifdef SO_BINDTODEVICE
2543 char devname
[IFNAMSIZ
+1];
2545 /* This is broken, at least in the Linux 2.4 kernel.
2546 To unbind, the arg must be a zero integer, not the empty string.
2547 This should work on all systems. KFS. 2003-09-23. */
2548 memset (devname
, 0, sizeof devname
);
2551 char *arg
= SSDATA (val
);
2552 int len
= min (strlen (arg
), IFNAMSIZ
);
2553 memcpy (devname
, arg
, len
);
2555 else if (!NILP (val
))
2556 error ("Bad option value for %s", name
);
2557 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2566 struct linger linger
;
2569 linger
.l_linger
= 0;
2571 linger
.l_linger
= XINT (val
);
2573 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2574 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2575 &linger
, sizeof (linger
));
2585 report_file_error ("Cannot set network option",
2586 Fcons (opt
, Fcons (val
, Qnil
)));
2587 return (1 << sopt
->optbit
);
2591 DEFUN ("set-network-process-option",
2592 Fset_network_process_option
, Sset_network_process_option
,
2594 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2595 See `make-network-process' for a list of options and values.
2596 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2597 OPTION is not a supported option, return nil instead; otherwise return t. */)
2598 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2601 struct Lisp_Process
*p
;
2603 CHECK_PROCESS (process
);
2604 p
= XPROCESS (process
);
2605 if (!NETCONN1_P (p
))
2606 error ("Process is not a network process");
2610 error ("Process is not running");
2612 if (set_socket_option (s
, option
, value
))
2614 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2618 if (NILP (no_error
))
2619 error ("Unknown or unsupported option");
2625 DEFUN ("serial-process-configure",
2626 Fserial_process_configure
,
2627 Sserial_process_configure
,
2629 doc
: /* Configure speed, bytesize, etc. of a serial process.
2631 Arguments are specified as keyword/argument pairs. Attributes that
2632 are not given are re-initialized from the process's current
2633 configuration (available via the function `process-contact') or set to
2634 reasonable default values. The following arguments are defined:
2640 -- Any of these arguments can be given to identify the process that is
2641 to be configured. If none of these arguments is given, the current
2642 buffer's process is used.
2644 :speed SPEED -- SPEED is the speed of the serial port in bits per
2645 second, also called baud rate. Any value can be given for SPEED, but
2646 most serial ports work only at a few defined values between 1200 and
2647 115200, with 9600 being the most common value. If SPEED is nil, the
2648 serial port is not configured any further, i.e., all other arguments
2649 are ignored. This may be useful for special serial ports such as
2650 Bluetooth-to-serial converters which can only be configured through AT
2651 commands. A value of nil for SPEED can be used only when passed
2652 through `make-serial-process' or `serial-term'.
2654 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2655 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2657 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2658 `odd' (use odd parity), or the symbol `even' (use even parity). If
2659 PARITY is not given, no parity is used.
2661 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2662 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2663 is not given or nil, 1 stopbit is used.
2665 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2666 flowcontrol to be used, which is either nil (don't use flowcontrol),
2667 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2668 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2669 flowcontrol is used.
2671 `serial-process-configure' is called by `make-serial-process' for the
2672 initial configuration of the serial port.
2676 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2678 \(serial-process-configure
2679 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2681 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2683 usage: (serial-process-configure &rest ARGS) */)
2684 (size_t nargs
, Lisp_Object
*args
)
2686 struct Lisp_Process
*p
;
2687 Lisp_Object contact
= Qnil
;
2688 Lisp_Object proc
= Qnil
;
2689 struct gcpro gcpro1
;
2691 contact
= Flist (nargs
, args
);
2694 proc
= Fplist_get (contact
, QCprocess
);
2696 proc
= Fplist_get (contact
, QCname
);
2698 proc
= Fplist_get (contact
, QCbuffer
);
2700 proc
= Fplist_get (contact
, QCport
);
2701 proc
= get_process (proc
);
2702 p
= XPROCESS (proc
);
2703 if (!EQ (p
->type
, Qserial
))
2704 error ("Not a serial process");
2706 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2712 serial_configure (p
, contact
);
2718 /* Used by make-serial-process to recover from errors. */
2720 make_serial_process_unwind (Lisp_Object proc
)
2722 if (!PROCESSP (proc
))
2724 remove_process (proc
);
2728 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2730 doc
: /* Create and return a serial port process.
2732 In Emacs, serial port connections are represented by process objects,
2733 so input and output work as for subprocesses, and `delete-process'
2734 closes a serial port connection. However, a serial process has no
2735 process id, it cannot be signaled, and the status codes are different
2736 from normal processes.
2738 `make-serial-process' creates a process and a buffer, on which you
2739 probably want to use `process-send-string'. Try \\[serial-term] for
2740 an interactive terminal. See below for examples.
2742 Arguments are specified as keyword/argument pairs. The following
2743 arguments are defined:
2745 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2746 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2747 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2748 the backslashes in strings).
2750 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2751 which is called by `make-serial-process'.
2753 :name NAME -- NAME is the name of the process. If NAME is not given,
2754 the value of PORT is used.
2756 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2757 with the process. Process output goes at the end of that buffer,
2758 unless you specify an output stream or filter function to handle the
2759 output. If BUFFER is not given, the value of NAME is used.
2761 :coding CODING -- If CODING is a symbol, it specifies the coding
2762 system used for both reading and writing for this process. If CODING
2763 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2764 ENCODING is used for writing.
2766 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2767 the process is running. If BOOL is not given, query before exiting.
2769 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2770 In the stopped state, a serial process does not accept incoming data,
2771 but you can send outgoing data. The stopped state is cleared by
2772 `continue-process' and set by `stop-process'.
2774 :filter FILTER -- Install FILTER as the process filter.
2776 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2778 :plist PLIST -- Install PLIST as the initial plist of the process.
2785 -- These arguments are handled by `serial-process-configure', which is
2786 called by `make-serial-process'.
2788 The original argument list, possibly modified by later configuration,
2789 is available via the function `process-contact'.
2793 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2795 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2797 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2799 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2801 usage: (make-serial-process &rest ARGS) */)
2802 (size_t nargs
, Lisp_Object
*args
)
2805 Lisp_Object proc
, contact
, port
;
2806 struct Lisp_Process
*p
;
2807 struct gcpro gcpro1
;
2808 Lisp_Object name
, buffer
;
2809 Lisp_Object tem
, val
;
2810 int specpdl_count
= -1;
2815 contact
= Flist (nargs
, args
);
2818 port
= Fplist_get (contact
, QCport
);
2820 error ("No port specified");
2821 CHECK_STRING (port
);
2823 if (NILP (Fplist_member (contact
, QCspeed
)))
2824 error (":speed not specified");
2825 if (!NILP (Fplist_get (contact
, QCspeed
)))
2826 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2828 name
= Fplist_get (contact
, QCname
);
2831 CHECK_STRING (name
);
2832 proc
= make_process (name
);
2833 specpdl_count
= SPECPDL_INDEX ();
2834 record_unwind_protect (make_serial_process_unwind
, proc
);
2835 p
= XPROCESS (proc
);
2837 fd
= serial_open (SSDATA (port
));
2840 if (fd
> max_process_desc
)
2841 max_process_desc
= fd
;
2842 chan_process
[fd
] = proc
;
2844 buffer
= Fplist_get (contact
, QCbuffer
);
2847 buffer
= Fget_buffer_create (buffer
);
2850 p
->childp
= contact
;
2851 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2853 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2854 p
->filter
= Fplist_get (contact
, QCfilter
);
2856 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2857 p
->kill_without_query
= 1;
2858 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2862 if (!EQ (p
->command
, Qt
))
2864 FD_SET (fd
, &input_wait_mask
);
2865 FD_SET (fd
, &non_keyboard_wait_mask
);
2868 if (BUFFERP (buffer
))
2870 set_marker_both (p
->mark
, buffer
,
2871 BUF_ZV (XBUFFER (buffer
)),
2872 BUF_ZV_BYTE (XBUFFER (buffer
)));
2875 tem
= Fplist_member (contact
, QCcoding
);
2876 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2882 val
= XCAR (XCDR (tem
));
2886 else if (!NILP (Vcoding_system_for_read
))
2887 val
= Vcoding_system_for_read
;
2888 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2889 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2891 p
->decode_coding_system
= val
;
2896 val
= XCAR (XCDR (tem
));
2900 else if (!NILP (Vcoding_system_for_write
))
2901 val
= Vcoding_system_for_write
;
2902 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2903 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2905 p
->encode_coding_system
= val
;
2907 setup_process_coding_systems (proc
);
2908 p
->decoding_buf
= empty_unibyte_string
;
2909 p
->decoding_carryover
= 0;
2910 p
->encoding_buf
= empty_unibyte_string
;
2911 p
->inherit_coding_system_flag
2912 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2914 Fserial_process_configure (nargs
, args
);
2916 specpdl_ptr
= specpdl
+ specpdl_count
;
2922 /* Create a network stream/datagram client/server process. Treated
2923 exactly like a normal process when reading and writing. Primary
2924 differences are in status display and process deletion. A network
2925 connection has no PID; you cannot signal it. All you can do is
2926 stop/continue it and deactivate/close it via delete-process */
2928 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2930 doc
: /* Create and return a network server or client process.
2932 In Emacs, network connections are represented by process objects, so
2933 input and output work as for subprocesses and `delete-process' closes
2934 a network connection. However, a network process has no process id,
2935 it cannot be signaled, and the status codes are different from normal
2938 Arguments are specified as keyword/argument pairs. The following
2939 arguments are defined:
2941 :name NAME -- NAME is name for process. It is modified if necessary
2944 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2945 with the process. Process output goes at end of that buffer, unless
2946 you specify an output stream or filter function to handle the output.
2947 BUFFER may be also nil, meaning that this process is not associated
2950 :host HOST -- HOST is name of the host to connect to, or its IP
2951 address. The symbol `local' specifies the local host. If specified
2952 for a server process, it must be a valid name or address for the local
2953 host, and only clients connecting to that address will be accepted.
2955 :service SERVICE -- SERVICE is name of the service desired, or an
2956 integer specifying a port number to connect to. If SERVICE is t,
2957 a random port number is selected for the server. (If Emacs was
2958 compiled with getaddrinfo, a port number can also be specified as a
2959 string, e.g. "80", as well as an integer. This is not portable.)
2961 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2962 stream type connection, `datagram' creates a datagram type connection,
2963 `seqpacket' creates a reliable datagram connection.
2965 :family FAMILY -- FAMILY is the address (and protocol) family for the
2966 service specified by HOST and SERVICE. The default (nil) is to use
2967 whatever address family (IPv4 or IPv6) that is defined for the host
2968 and port number specified by HOST and SERVICE. Other address families
2970 local -- for a local (i.e. UNIX) address specified by SERVICE.
2971 ipv4 -- use IPv4 address family only.
2972 ipv6 -- use IPv6 address family only.
2974 :local ADDRESS -- ADDRESS is the local address used for the connection.
2975 This parameter is ignored when opening a client process. When specified
2976 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2978 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2979 connection. This parameter is ignored when opening a stream server
2980 process. For a datagram server process, it specifies the initial
2981 setting of the remote datagram address. When specified for a client
2982 process, the FAMILY, HOST, and SERVICE args are ignored.
2984 The format of ADDRESS depends on the address family:
2985 - An IPv4 address is represented as an vector of integers [A B C D P]
2986 corresponding to numeric IP address A.B.C.D and port number P.
2987 - A local address is represented as a string with the address in the
2988 local address space.
2989 - An "unsupported family" address is represented by a cons (F . AV)
2990 where F is the family number and AV is a vector containing the socket
2991 address data with one element per address data byte. Do not rely on
2992 this format in portable code, as it may depend on implementation
2993 defined constants, data sizes, and data structure alignment.
2995 :coding CODING -- If CODING is a symbol, it specifies the coding
2996 system used for both reading and writing for this process. If CODING
2997 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2998 ENCODING is used for writing.
3000 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
3001 return without waiting for the connection to complete; instead, the
3002 sentinel function will be called with second arg matching "open" (if
3003 successful) or "failed" when the connect completes. Default is to use
3004 a blocking connect (i.e. wait) for stream type connections.
3006 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
3007 running when Emacs is exited.
3009 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
3010 In the stopped state, a server process does not accept new
3011 connections, and a client process does not handle incoming traffic.
3012 The stopped state is cleared by `continue-process' and set by
3015 :filter FILTER -- Install FILTER as the process filter.
3017 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
3018 process filter are multibyte, otherwise they are unibyte.
3019 If this keyword is not specified, the strings are multibyte if
3020 `default-enable-multibyte-characters' is non-nil.
3022 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
3024 :log LOG -- Install LOG as the server process log function. This
3025 function is called when the server accepts a network connection from a
3026 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
3027 is the server process, CLIENT is the new process for the connection,
3028 and MESSAGE is a string.
3030 :plist PLIST -- Install PLIST as the new process' initial plist.
3032 :server QLEN -- if QLEN is non-nil, create a server process for the
3033 specified FAMILY, SERVICE, and connection type (stream or datagram).
3034 If QLEN is an integer, it is used as the max. length of the server's
3035 pending connection queue (also known as the backlog); the default
3036 queue length is 5. Default is to create a client process.
3038 The following network options can be specified for this connection:
3040 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
3041 :dontroute BOOL -- Only send to directly connected hosts.
3042 :keepalive BOOL -- Send keep-alive messages on network stream.
3043 :linger BOOL or TIMEOUT -- Send queued messages before closing.
3044 :oobinline BOOL -- Place out-of-band data in receive data stream.
3045 :priority INT -- Set protocol defined priority for sent packets.
3046 :reuseaddr BOOL -- Allow reusing a recently used local address
3047 (this is allowed by default for a server process).
3048 :bindtodevice NAME -- bind to interface NAME. Using this may require
3049 special privileges on some systems.
3051 Consult the relevant system programmer's manual pages for more
3052 information on using these options.
3055 A server process will listen for and accept connections from clients.
3056 When a client connection is accepted, a new network process is created
3057 for the connection with the following parameters:
3059 - The client's process name is constructed by concatenating the server
3060 process' NAME and a client identification string.
3061 - If the FILTER argument is non-nil, the client process will not get a
3062 separate process buffer; otherwise, the client's process buffer is a newly
3063 created buffer named after the server process' BUFFER name or process
3064 NAME concatenated with the client identification string.
3065 - The connection type and the process filter and sentinel parameters are
3066 inherited from the server process' TYPE, FILTER and SENTINEL.
3067 - The client process' contact info is set according to the client's
3068 addressing information (typically an IP address and a port number).
3069 - The client process' plist is initialized from the server's plist.
3071 Notice that the FILTER and SENTINEL args are never used directly by
3072 the server process. Also, the BUFFER argument is not used directly by
3073 the server process, but via the optional :log function, accepted (and
3074 failed) connections may be logged in the server process' buffer.
3076 The original argument list, modified with the actual connection
3077 information, is available via the `process-contact' function.
3079 usage: (make-network-process &rest ARGS) */)
3080 (size_t nargs
, Lisp_Object
*args
)
3083 Lisp_Object contact
;
3084 struct Lisp_Process
*p
;
3085 #ifdef HAVE_GETADDRINFO
3086 struct addrinfo ai
, *res
, *lres
;
3087 struct addrinfo hints
;
3088 const char *portstring
;
3090 #else /* HAVE_GETADDRINFO */
3091 struct _emacs_addrinfo
3097 struct sockaddr
*ai_addr
;
3098 struct _emacs_addrinfo
*ai_next
;
3100 #endif /* HAVE_GETADDRINFO */
3101 struct sockaddr_in address_in
;
3102 #ifdef HAVE_LOCAL_SOCKETS
3103 struct sockaddr_un address_un
;
3108 int s
= -1, outch
, inch
;
3109 struct gcpro gcpro1
;
3110 int count
= SPECPDL_INDEX ();
3112 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
3114 Lisp_Object name
, buffer
, host
, service
, address
;
3115 Lisp_Object filter
, sentinel
;
3116 int is_non_blocking_client
= 0;
3117 int is_server
= 0, backlog
= 5;
3124 /* Save arguments for process-contact and clone-process. */
3125 contact
= Flist (nargs
, args
);
3129 /* Ensure socket support is loaded if available. */
3130 init_winsock (TRUE
);
3133 /* :type TYPE (nil: stream, datagram */
3134 tem
= Fplist_get (contact
, QCtype
);
3136 socktype
= SOCK_STREAM
;
3137 #ifdef DATAGRAM_SOCKETS
3138 else if (EQ (tem
, Qdatagram
))
3139 socktype
= SOCK_DGRAM
;
3141 #ifdef HAVE_SEQPACKET
3142 else if (EQ (tem
, Qseqpacket
))
3143 socktype
= SOCK_SEQPACKET
;
3146 error ("Unsupported connection type");
3149 tem
= Fplist_get (contact
, QCserver
);
3152 /* Don't support network sockets when non-blocking mode is
3153 not available, since a blocked Emacs is not useful. */
3154 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
3155 error ("Network servers not supported");
3159 backlog
= XINT (tem
);
3163 /* Make QCaddress an alias for :local (server) or :remote (client). */
3164 QCaddress
= is_server
? QClocal
: QCremote
;
3167 if (!is_server
&& socktype
!= SOCK_DGRAM
3168 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
3170 #ifndef NON_BLOCKING_CONNECT
3171 error ("Non-blocking connect not supported");
3173 is_non_blocking_client
= 1;
3177 name
= Fplist_get (contact
, QCname
);
3178 buffer
= Fplist_get (contact
, QCbuffer
);
3179 filter
= Fplist_get (contact
, QCfilter
);
3180 sentinel
= Fplist_get (contact
, QCsentinel
);
3182 CHECK_STRING (name
);
3184 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3185 ai
.ai_socktype
= socktype
;
3190 /* :local ADDRESS or :remote ADDRESS */
3191 address
= Fplist_get (contact
, QCaddress
);
3192 if (!NILP (address
))
3194 host
= service
= Qnil
;
3196 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3197 error ("Malformed :address");
3198 ai
.ai_family
= family
;
3199 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3200 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3204 /* :family FAMILY -- nil (for Inet), local, or integer. */
3205 tem
= Fplist_get (contact
, QCfamily
);
3208 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3214 #ifdef HAVE_LOCAL_SOCKETS
3215 else if (EQ (tem
, Qlocal
))
3219 else if (EQ (tem
, Qipv6
))
3222 else if (EQ (tem
, Qipv4
))
3224 else if (INTEGERP (tem
))
3225 family
= XINT (tem
);
3227 error ("Unknown address family");
3229 ai
.ai_family
= family
;
3231 /* :service SERVICE -- string, integer (port number), or t (random port). */
3232 service
= Fplist_get (contact
, QCservice
);
3234 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3235 host
= Fplist_get (contact
, QChost
);
3238 if (EQ (host
, Qlocal
))
3239 /* Depending on setup, "localhost" may map to different IPv4 and/or
3240 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3241 host
= build_string ("127.0.0.1");
3242 CHECK_STRING (host
);
3245 #ifdef HAVE_LOCAL_SOCKETS
3246 if (family
== AF_LOCAL
)
3250 message (":family local ignores the :host \"%s\" property",
3252 contact
= Fplist_put (contact
, QChost
, Qnil
);
3255 CHECK_STRING (service
);
3256 memset (&address_un
, 0, sizeof address_un
);
3257 address_un
.sun_family
= AF_LOCAL
;
3258 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3259 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3260 ai
.ai_addrlen
= sizeof address_un
;
3265 /* Slow down polling to every ten seconds.
3266 Some kernels have a bug which causes retrying connect to fail
3267 after a connect. Polling can interfere with gethostbyname too. */
3268 #ifdef POLL_FOR_INPUT
3269 if (socktype
!= SOCK_DGRAM
)
3271 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3272 bind_polling_period (10);
3276 #ifdef HAVE_GETADDRINFO
3277 /* If we have a host, use getaddrinfo to resolve both host and service.
3278 Otherwise, use getservbyname to lookup the service. */
3282 /* SERVICE can either be a string or int.
3283 Convert to a C string for later use by getaddrinfo. */
3284 if (EQ (service
, Qt
))
3286 else if (INTEGERP (service
))
3288 sprintf (portbuf
, "%ld", (long) XINT (service
));
3289 portstring
= portbuf
;
3293 CHECK_STRING (service
);
3294 portstring
= SSDATA (service
);
3299 memset (&hints
, 0, sizeof (hints
));
3301 hints
.ai_family
= family
;
3302 hints
.ai_socktype
= socktype
;
3303 hints
.ai_protocol
= 0;
3305 #ifdef HAVE_RES_INIT
3309 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3311 #ifdef HAVE_GAI_STRERROR
3312 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3314 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3320 #endif /* HAVE_GETADDRINFO */
3322 /* We end up here if getaddrinfo is not defined, or in case no hostname
3323 has been specified (e.g. for a local server process). */
3325 if (EQ (service
, Qt
))
3327 else if (INTEGERP (service
))
3328 port
= htons ((unsigned short) XINT (service
));
3331 struct servent
*svc_info
;
3332 CHECK_STRING (service
);
3333 svc_info
= getservbyname (SSDATA (service
),
3334 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3336 error ("Unknown service: %s", SDATA (service
));
3337 port
= svc_info
->s_port
;
3340 memset (&address_in
, 0, sizeof address_in
);
3341 address_in
.sin_family
= family
;
3342 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3343 address_in
.sin_port
= port
;
3345 #ifndef HAVE_GETADDRINFO
3348 struct hostent
*host_info_ptr
;
3350 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3351 as it may `hang' Emacs for a very long time. */
3355 #ifdef HAVE_RES_INIT
3359 host_info_ptr
= gethostbyname (SDATA (host
));
3364 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3365 host_info_ptr
->h_length
);
3366 family
= host_info_ptr
->h_addrtype
;
3367 address_in
.sin_family
= family
;
3370 /* Attempt to interpret host as numeric inet address */
3372 unsigned long numeric_addr
;
3373 numeric_addr
= inet_addr (SSDATA (host
));
3374 if (numeric_addr
== -1)
3375 error ("Unknown host \"%s\"", SDATA (host
));
3377 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3378 sizeof (address_in
.sin_addr
));
3382 #endif /* not HAVE_GETADDRINFO */
3384 ai
.ai_family
= family
;
3385 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3386 ai
.ai_addrlen
= sizeof address_in
;
3390 /* Do this in case we never enter the for-loop below. */
3391 count1
= SPECPDL_INDEX ();
3394 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3403 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3410 #ifdef DATAGRAM_SOCKETS
3411 if (!is_server
&& socktype
== SOCK_DGRAM
)
3413 #endif /* DATAGRAM_SOCKETS */
3415 #ifdef NON_BLOCKING_CONNECT
3416 if (is_non_blocking_client
)
3419 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3421 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3433 /* Make us close S if quit. */
3434 record_unwind_protect (close_file_unwind
, make_number (s
));
3436 /* Parse network options in the arg list.
3437 We simply ignore anything which isn't a known option (including other keywords).
3438 An error is signaled if setting a known option fails. */
3439 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3440 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3444 /* Configure as a server socket. */
3446 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3447 explicit :reuseaddr key to override this. */
3448 #ifdef HAVE_LOCAL_SOCKETS
3449 if (family
!= AF_LOCAL
)
3451 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3454 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3455 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3458 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3459 report_file_error ("Cannot bind server socket", Qnil
);
3461 #ifdef HAVE_GETSOCKNAME
3462 if (EQ (service
, Qt
))
3464 struct sockaddr_in sa1
;
3465 socklen_t len1
= sizeof (sa1
);
3466 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3468 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3469 service
= make_number (ntohs (sa1
.sin_port
));
3470 contact
= Fplist_put (contact
, QCservice
, service
);
3475 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3476 report_file_error ("Cannot listen on server socket", Qnil
);
3484 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3487 if (ret
== 0 || xerrno
== EISCONN
)
3489 /* The unwind-protect will be discarded afterwards.
3490 Likewise for immediate_quit. */
3494 #ifdef NON_BLOCKING_CONNECT
3496 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3500 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3507 if (xerrno
== EINTR
)
3509 /* Unlike most other syscalls connect() cannot be called
3510 again. (That would return EALREADY.) The proper way to
3511 wait for completion is select(). */
3519 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3526 report_file_error ("select failed", Qnil
);
3530 len
= sizeof xerrno
;
3531 eassert (FD_ISSET (s
, &fdset
));
3532 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3533 report_file_error ("getsockopt failed", Qnil
);
3535 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3539 #endif /* !WINDOWSNT */
3543 /* Discard the unwind protect closing S. */
3544 specpdl_ptr
= specpdl
+ count1
;
3549 if (xerrno
== EINTR
)
3556 #ifdef DATAGRAM_SOCKETS
3557 if (socktype
== SOCK_DGRAM
)
3559 if (datagram_address
[s
].sa
)
3561 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3562 datagram_address
[s
].len
= lres
->ai_addrlen
;
3566 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3567 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3570 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3571 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3572 conv_lisp_to_sockaddr (rfamily
, remote
,
3573 datagram_address
[s
].sa
, rlen
);
3577 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3580 contact
= Fplist_put (contact
, QCaddress
,
3581 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3582 #ifdef HAVE_GETSOCKNAME
3585 struct sockaddr_in sa1
;
3586 socklen_t len1
= sizeof (sa1
);
3587 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3588 contact
= Fplist_put (contact
, QClocal
,
3589 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3596 #ifdef HAVE_GETADDRINFO
3605 /* Discard the unwind protect for closing S, if any. */
3606 specpdl_ptr
= specpdl
+ count1
;
3608 /* Unwind bind_polling_period and request_sigio. */
3609 unbind_to (count
, Qnil
);
3613 /* If non-blocking got this far - and failed - assume non-blocking is
3614 not supported after all. This is probably a wrong assumption, but
3615 the normal blocking calls to open-network-stream handles this error
3617 if (is_non_blocking_client
)
3622 report_file_error ("make server process failed", contact
);
3624 report_file_error ("make client process failed", contact
);
3631 buffer
= Fget_buffer_create (buffer
);
3632 proc
= make_process (name
);
3634 chan_process
[inch
] = proc
;
3637 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3640 fcntl (inch
, F_SETFL
, O_NDELAY
);
3644 p
= XPROCESS (proc
);
3646 p
->childp
= contact
;
3647 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3651 p
->sentinel
= sentinel
;
3653 p
->log
= Fplist_get (contact
, QClog
);
3654 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3655 p
->kill_without_query
= 1;
3656 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3661 if (is_server
&& socktype
!= SOCK_DGRAM
)
3662 p
->status
= Qlisten
;
3664 /* Make the process marker point into the process buffer (if any). */
3665 if (BUFFERP (buffer
))
3666 set_marker_both (p
->mark
, buffer
,
3667 BUF_ZV (XBUFFER (buffer
)),
3668 BUF_ZV_BYTE (XBUFFER (buffer
)));
3670 #ifdef NON_BLOCKING_CONNECT
3671 if (is_non_blocking_client
)
3673 /* We may get here if connect did succeed immediately. However,
3674 in that case, we still need to signal this like a non-blocking
3676 p
->status
= Qconnect
;
3677 if (!FD_ISSET (inch
, &connect_wait_mask
))
3679 FD_SET (inch
, &connect_wait_mask
);
3680 FD_SET (inch
, &write_mask
);
3681 num_pending_connects
++;
3686 /* A server may have a client filter setting of Qt, but it must
3687 still listen for incoming connects unless it is stopped. */
3688 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3689 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3691 FD_SET (inch
, &input_wait_mask
);
3692 FD_SET (inch
, &non_keyboard_wait_mask
);
3695 if (inch
> max_process_desc
)
3696 max_process_desc
= inch
;
3698 tem
= Fplist_member (contact
, QCcoding
);
3699 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3700 tem
= Qnil
; /* No error message (too late!). */
3703 /* Setup coding systems for communicating with the network stream. */
3704 struct gcpro inner_gcpro1
;
3705 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3706 Lisp_Object coding_systems
= Qt
;
3707 Lisp_Object fargs
[5], val
;
3711 val
= XCAR (XCDR (tem
));
3715 else if (!NILP (Vcoding_system_for_read
))
3716 val
= Vcoding_system_for_read
;
3717 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3718 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3719 /* We dare not decode end-of-line format by setting VAL to
3720 Qraw_text, because the existing Emacs Lisp libraries
3721 assume that they receive bare code including a sequene of
3726 if (NILP (host
) || NILP (service
))
3727 coding_systems
= Qnil
;
3730 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3731 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3732 GCPRO1_VAR (proc
, inner_gcpro
);
3733 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3734 UNGCPRO_VAR (inner_gcpro
);
3736 if (CONSP (coding_systems
))
3737 val
= XCAR (coding_systems
);
3738 else if (CONSP (Vdefault_process_coding_system
))
3739 val
= XCAR (Vdefault_process_coding_system
);
3743 p
->decode_coding_system
= val
;
3747 val
= XCAR (XCDR (tem
));
3751 else if (!NILP (Vcoding_system_for_write
))
3752 val
= Vcoding_system_for_write
;
3753 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3757 if (EQ (coding_systems
, Qt
))
3759 if (NILP (host
) || NILP (service
))
3760 coding_systems
= Qnil
;
3763 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3764 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3765 GCPRO1_VAR (proc
, inner_gcpro
);
3766 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3767 UNGCPRO_VAR (inner_gcpro
);
3770 if (CONSP (coding_systems
))
3771 val
= XCDR (coding_systems
);
3772 else if (CONSP (Vdefault_process_coding_system
))
3773 val
= XCDR (Vdefault_process_coding_system
);
3777 p
->encode_coding_system
= val
;
3779 setup_process_coding_systems (proc
);
3781 p
->decoding_buf
= empty_unibyte_string
;
3782 p
->decoding_carryover
= 0;
3783 p
->encoding_buf
= empty_unibyte_string
;
3785 p
->inherit_coding_system_flag
3786 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3793 #if defined(HAVE_NET_IF_H)
3796 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3797 doc
: /* Return an alist of all network interfaces and their network address.
3798 Each element is a cons, the car of which is a string containing the
3799 interface name, and the cdr is the network address in internal
3800 format; see the description of ADDRESS in `make-network-process'. */)
3803 struct ifconf ifconf
;
3804 struct ifreq
*ifreqs
= NULL
;
3809 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3815 buf_size
= ifaces
* sizeof (ifreqs
[0]);
3816 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3823 ifconf
.ifc_len
= buf_size
;
3824 ifconf
.ifc_req
= ifreqs
;
3825 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3831 if (ifconf
.ifc_len
== buf_size
)
3835 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3838 while (--ifaces
>= 0)
3840 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3841 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3842 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3844 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3845 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3846 res
= Fcons (Fcons (build_string (namebuf
),
3847 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3848 sizeof (struct sockaddr
))),
3854 #endif /* SIOCGIFCONF */
3856 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3860 const char *flag_sym
;
3863 static const struct ifflag_def ifflag_table
[] = {
3867 #ifdef IFF_BROADCAST
3868 { IFF_BROADCAST
, "broadcast" },
3871 { IFF_DEBUG
, "debug" },
3874 { IFF_LOOPBACK
, "loopback" },
3876 #ifdef IFF_POINTOPOINT
3877 { IFF_POINTOPOINT
, "pointopoint" },
3880 { IFF_RUNNING
, "running" },
3883 { IFF_NOARP
, "noarp" },
3886 { IFF_PROMISC
, "promisc" },
3888 #ifdef IFF_NOTRAILERS
3889 { IFF_NOTRAILERS
, "notrailers" },
3892 { IFF_ALLMULTI
, "allmulti" },
3895 { IFF_MASTER
, "master" },
3898 { IFF_SLAVE
, "slave" },
3900 #ifdef IFF_MULTICAST
3901 { IFF_MULTICAST
, "multicast" },
3904 { IFF_PORTSEL
, "portsel" },
3906 #ifdef IFF_AUTOMEDIA
3907 { IFF_AUTOMEDIA
, "automedia" },
3910 { IFF_DYNAMIC
, "dynamic" },
3913 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3916 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3919 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3922 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3925 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3930 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3931 doc
: /* Return information about network interface named IFNAME.
3932 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3933 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3934 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3935 FLAGS is the current flags of the interface. */)
3936 (Lisp_Object ifname
)
3939 Lisp_Object res
= Qnil
;
3944 CHECK_STRING (ifname
);
3946 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3947 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3949 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3954 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3955 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3957 int flags
= rq
.ifr_flags
;
3958 const struct ifflag_def
*fp
;
3962 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3964 if (flags
& fp
->flag_bit
)
3966 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3967 flags
-= fp
->flag_bit
;
3970 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3972 if (flags
& (1 << fnum
))
3974 elt
= Fcons (make_number (fnum
), elt
);
3979 res
= Fcons (elt
, res
);
3982 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3983 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3985 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3986 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3990 for (n
= 0; n
< 6; n
++)
3991 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3992 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3995 res
= Fcons (elt
, res
);
3998 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3999 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
4002 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
4003 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
4005 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4009 res
= Fcons (elt
, res
);
4012 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4013 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4016 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4019 res
= Fcons (elt
, res
);
4022 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
4023 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4026 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4029 res
= Fcons (elt
, res
);
4033 return any
? res
: Qnil
;
4036 #endif /* defined(HAVE_NET_IF_H) */
4038 /* Turn off input and output for process PROC. */
4041 deactivate_process (Lisp_Object proc
)
4043 register int inchannel
, outchannel
;
4044 register struct Lisp_Process
*p
= XPROCESS (proc
);
4046 inchannel
= p
->infd
;
4047 outchannel
= p
->outfd
;
4049 #ifdef ADAPTIVE_READ_BUFFERING
4050 if (p
->read_output_delay
> 0)
4052 if (--process_output_delay_count
< 0)
4053 process_output_delay_count
= 0;
4054 p
->read_output_delay
= 0;
4055 p
->read_output_skip
= 0;
4061 /* Beware SIGCHLD hereabouts. */
4062 flush_pending_output (inchannel
);
4063 emacs_close (inchannel
);
4064 if (outchannel
>= 0 && outchannel
!= inchannel
)
4065 emacs_close (outchannel
);
4069 #ifdef DATAGRAM_SOCKETS
4070 if (DATAGRAM_CHAN_P (inchannel
))
4072 xfree (datagram_address
[inchannel
].sa
);
4073 datagram_address
[inchannel
].sa
= 0;
4074 datagram_address
[inchannel
].len
= 0;
4077 chan_process
[inchannel
] = Qnil
;
4078 FD_CLR (inchannel
, &input_wait_mask
);
4079 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4080 #ifdef NON_BLOCKING_CONNECT
4081 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4083 FD_CLR (inchannel
, &connect_wait_mask
);
4084 FD_CLR (inchannel
, &write_mask
);
4085 if (--num_pending_connects
< 0)
4089 if (inchannel
== max_process_desc
)
4092 /* We just closed the highest-numbered process input descriptor,
4093 so recompute the highest-numbered one now. */
4094 max_process_desc
= 0;
4095 for (i
= 0; i
< MAXDESC
; i
++)
4096 if (!NILP (chan_process
[i
]))
4097 max_process_desc
= i
;
4103 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4105 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4106 It is read into the process' buffers or given to their filter functions.
4107 Non-nil arg PROCESS means do not return until some output has been received
4110 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4111 and milliseconds to wait; return after that much time whether or not
4112 there is any subprocess output. If SECONDS is a floating point number,
4113 it specifies a fractional number of seconds to wait.
4114 The MILLISEC argument is obsolete and should be avoided.
4116 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4117 from PROCESS, suspending reading output from other processes.
4118 If JUST-THIS-ONE is an integer, don't run any timers either.
4119 Return non-nil if we received any output before the timeout expired. */)
4120 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4122 int secs
, usecs
= 0;
4124 if (! NILP (process
))
4125 CHECK_PROCESS (process
);
4127 just_this_one
= Qnil
;
4129 if (!NILP (millisec
))
4130 { /* Obsolete calling convention using integers rather than floats. */
4131 CHECK_NUMBER (millisec
);
4133 seconds
= make_float (XINT (millisec
) / 1000.0);
4136 CHECK_NUMBER (seconds
);
4137 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4141 if (!NILP (seconds
))
4143 if (INTEGERP (seconds
))
4144 secs
= XINT (seconds
);
4145 else if (FLOATP (seconds
))
4147 double timeout
= XFLOAT_DATA (seconds
);
4148 secs
= (int) timeout
;
4149 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
4152 wrong_type_argument (Qnumberp
, seconds
);
4154 if (secs
< 0 || (secs
== 0 && usecs
== 0))
4155 secs
= -1, usecs
= 0;
4158 secs
= NILP (process
) ? -1 : 0;
4161 (wait_reading_process_output (secs
, usecs
, 0, 0,
4163 !NILP (process
) ? XPROCESS (process
) : NULL
,
4164 NILP (just_this_one
) ? 0 :
4165 !INTEGERP (just_this_one
) ? 1 : -1)
4169 /* Accept a connection for server process SERVER on CHANNEL. */
4171 static int connect_counter
= 0;
4174 server_accept_connection (Lisp_Object server
, int channel
)
4176 Lisp_Object proc
, caller
, name
, buffer
;
4177 Lisp_Object contact
, host
, service
;
4178 struct Lisp_Process
*ps
= XPROCESS (server
);
4179 struct Lisp_Process
*p
;
4183 struct sockaddr_in in
;
4185 struct sockaddr_in6 in6
;
4187 #ifdef HAVE_LOCAL_SOCKETS
4188 struct sockaddr_un un
;
4191 socklen_t len
= sizeof saddr
;
4193 s
= accept (channel
, &saddr
.sa
, &len
);
4202 if (code
== EWOULDBLOCK
)
4206 if (!NILP (ps
->log
))
4207 call3 (ps
->log
, server
, Qnil
,
4208 concat3 (build_string ("accept failed with code"),
4209 Fnumber_to_string (make_number (code
)),
4210 build_string ("\n")));
4216 /* Setup a new process to handle the connection. */
4218 /* Generate a unique identification of the caller, and build contact
4219 information for this process. */
4222 switch (saddr
.sa
.sa_family
)
4226 Lisp_Object args
[5];
4227 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4228 args
[0] = build_string ("%d.%d.%d.%d");
4229 args
[1] = make_number (*ip
++);
4230 args
[2] = make_number (*ip
++);
4231 args
[3] = make_number (*ip
++);
4232 args
[4] = make_number (*ip
++);
4233 host
= Fformat (5, args
);
4234 service
= make_number (ntohs (saddr
.in
.sin_port
));
4236 args
[0] = build_string (" <%s:%d>");
4239 caller
= Fformat (3, args
);
4246 Lisp_Object args
[9];
4247 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4249 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4250 for (i
= 0; i
< 8; i
++)
4251 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4252 host
= Fformat (9, args
);
4253 service
= make_number (ntohs (saddr
.in
.sin_port
));
4255 args
[0] = build_string (" <[%s]:%d>");
4258 caller
= Fformat (3, args
);
4263 #ifdef HAVE_LOCAL_SOCKETS
4267 caller
= Fnumber_to_string (make_number (connect_counter
));
4268 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4272 /* Create a new buffer name for this process if it doesn't have a
4273 filter. The new buffer name is based on the buffer name or
4274 process name of the server process concatenated with the caller
4277 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4281 buffer
= ps
->buffer
;
4283 buffer
= Fbuffer_name (buffer
);
4288 buffer
= concat2 (buffer
, caller
);
4289 buffer
= Fget_buffer_create (buffer
);
4293 /* Generate a unique name for the new server process. Combine the
4294 server process name with the caller identification. */
4296 name
= concat2 (ps
->name
, caller
);
4297 proc
= make_process (name
);
4299 chan_process
[s
] = proc
;
4302 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4305 fcntl (s
, F_SETFL
, O_NDELAY
);
4309 p
= XPROCESS (proc
);
4311 /* Build new contact information for this setup. */
4312 contact
= Fcopy_sequence (ps
->childp
);
4313 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4314 contact
= Fplist_put (contact
, QChost
, host
);
4315 if (!NILP (service
))
4316 contact
= Fplist_put (contact
, QCservice
, service
);
4317 contact
= Fplist_put (contact
, QCremote
,
4318 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4319 #ifdef HAVE_GETSOCKNAME
4321 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4322 contact
= Fplist_put (contact
, QClocal
,
4323 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4326 p
->childp
= contact
;
4327 p
->plist
= Fcopy_sequence (ps
->plist
);
4331 p
->sentinel
= ps
->sentinel
;
4332 p
->filter
= ps
->filter
;
4339 /* Client processes for accepted connections are not stopped initially. */
4340 if (!EQ (p
->filter
, Qt
))
4342 FD_SET (s
, &input_wait_mask
);
4343 FD_SET (s
, &non_keyboard_wait_mask
);
4346 if (s
> max_process_desc
)
4347 max_process_desc
= s
;
4349 /* Setup coding system for new process based on server process.
4350 This seems to be the proper thing to do, as the coding system
4351 of the new process should reflect the settings at the time the
4352 server socket was opened; not the current settings. */
4354 p
->decode_coding_system
= ps
->decode_coding_system
;
4355 p
->encode_coding_system
= ps
->encode_coding_system
;
4356 setup_process_coding_systems (proc
);
4358 p
->decoding_buf
= empty_unibyte_string
;
4359 p
->decoding_carryover
= 0;
4360 p
->encoding_buf
= empty_unibyte_string
;
4362 p
->inherit_coding_system_flag
4363 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4365 if (!NILP (ps
->log
))
4366 call3 (ps
->log
, server
, proc
,
4367 concat3 (build_string ("accept from "),
4368 (STRINGP (host
) ? host
: build_string ("-")),
4369 build_string ("\n")));
4371 if (!NILP (p
->sentinel
))
4372 exec_sentinel (proc
,
4373 concat3 (build_string ("open from "),
4374 (STRINGP (host
) ? host
: build_string ("-")),
4375 build_string ("\n")));
4378 /* This variable is different from waiting_for_input in keyboard.c.
4379 It is used to communicate to a lisp process-filter/sentinel (via the
4380 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4381 for user-input when that process-filter was called.
4382 waiting_for_input cannot be used as that is by definition 0 when
4383 lisp code is being evalled.
4384 This is also used in record_asynch_buffer_change.
4385 For that purpose, this must be 0
4386 when not inside wait_reading_process_output. */
4387 static int waiting_for_user_input_p
;
4390 wait_reading_process_output_unwind (Lisp_Object data
)
4392 waiting_for_user_input_p
= XINT (data
);
4396 /* This is here so breakpoints can be put on it. */
4398 wait_reading_process_output_1 (void)
4402 /* Use a wrapper around select to work around a bug in gdb 5.3.
4403 Normally, the wrapper is optimized away by inlining.
4405 If emacs is stopped inside select, the gdb backtrace doesn't
4406 show the function which called select, so it is practically
4407 impossible to step through wait_reading_process_output. */
4411 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4413 return select (n
, rfd
, wfd
, xfd
, tmo
);
4415 #define select select_wrapper
4418 /* Read and dispose of subprocess output while waiting for timeout to
4419 elapse and/or keyboard input to be available.
4422 timeout in seconds, or
4423 zero for no limit, or
4424 -1 means gobble data immediately available but don't wait for any.
4427 an additional duration to wait, measured in microseconds.
4428 If this is nonzero and time_limit is 0, then the timeout
4429 consists of MICROSECS only.
4431 READ_KBD is a lisp value:
4432 0 to ignore keyboard input, or
4433 1 to return when input is available, or
4434 -1 meaning caller will actually read the input, so don't throw to
4435 the quit handler, or
4437 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4438 output that arrives.
4440 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4441 (and gobble terminal input into the buffer if any arrives).
4443 If WAIT_PROC is specified, wait until something arrives from that
4444 process. The return value is true if we read some input from
4447 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4448 (suspending output from other processes). A negative value
4449 means don't run any timers either.
4451 If WAIT_PROC is specified, then the function returns true if we
4452 received input from that process before the timeout elapsed.
4453 Otherwise, return true if we received input from any process. */
4456 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4458 Lisp_Object wait_for_cell
,
4459 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4461 register int channel
, nfds
;
4462 SELECT_TYPE Available
;
4463 SELECT_TYPE Writeok
;
4465 int check_delay
, no_avail
;
4468 EMACS_TIME timeout
, end_time
;
4469 int wait_channel
= -1;
4470 int got_some_input
= 0;
4471 int count
= SPECPDL_INDEX ();
4473 FD_ZERO (&Available
);
4476 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4477 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4478 message ("Blocking call to accept-process-output with quit inhibited!!");
4480 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4481 if (wait_proc
!= NULL
)
4482 wait_channel
= wait_proc
->infd
;
4484 record_unwind_protect (wait_reading_process_output_unwind
,
4485 make_number (waiting_for_user_input_p
));
4486 waiting_for_user_input_p
= read_kbd
;
4488 /* Since we may need to wait several times,
4489 compute the absolute time to return at. */
4490 if (time_limit
|| microsecs
)
4492 EMACS_GET_TIME (end_time
);
4493 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4494 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4499 int timeout_reduced_for_timers
= 0;
4501 /* If calling from keyboard input, do not quit
4502 since we want to return C-g as an input character.
4503 Otherwise, do pending quit if requested. */
4508 process_pending_signals ();
4511 /* Exit now if the cell we're waiting for became non-nil. */
4512 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4515 /* Compute time from now till when time limit is up */
4516 /* Exit if already run out */
4517 if (time_limit
== -1)
4519 /* -1 specified for timeout means
4520 gobble output available now
4521 but don't wait at all. */
4523 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4525 else if (time_limit
|| microsecs
)
4527 EMACS_GET_TIME (timeout
);
4528 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4529 if (EMACS_TIME_NEG_P (timeout
))
4534 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4537 /* Normally we run timers here.
4538 But not if wait_for_cell; in those cases,
4539 the wait is supposed to be short,
4540 and those callers cannot handle running arbitrary Lisp code here. */
4541 if (NILP (wait_for_cell
)
4542 && just_wait_proc
>= 0)
4544 EMACS_TIME timer_delay
;
4548 int old_timers_run
= timers_run
;
4549 struct buffer
*old_buffer
= current_buffer
;
4550 Lisp_Object old_window
= selected_window
;
4552 timer_delay
= timer_check ();
4554 /* If a timer has run, this might have changed buffers
4555 an alike. Make read_key_sequence aware of that. */
4556 if (timers_run
!= old_timers_run
4557 && (old_buffer
!= current_buffer
4558 || !EQ (old_window
, selected_window
))
4559 && waiting_for_user_input_p
== -1)
4560 record_asynch_buffer_change ();
4562 if (timers_run
!= old_timers_run
&& do_display
)
4563 /* We must retry, since a timer may have requeued itself
4564 and that could alter the time_delay. */
4565 redisplay_preserve_echo_area (9);
4569 while (!detect_input_pending ());
4571 /* If there is unread keyboard input, also return. */
4573 && requeued_events_pending_p ())
4576 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4578 EMACS_TIME difference
;
4579 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4580 if (EMACS_TIME_NEG_P (difference
))
4582 timeout
= timer_delay
;
4583 timeout_reduced_for_timers
= 1;
4586 /* If time_limit is -1, we are not going to wait at all. */
4587 else if (time_limit
!= -1)
4589 /* This is so a breakpoint can be put here. */
4590 wait_reading_process_output_1 ();
4594 /* Cause C-g and alarm signals to take immediate action,
4595 and cause input available signals to zero out timeout.
4597 It is important that we do this before checking for process
4598 activity. If we get a SIGCHLD after the explicit checks for
4599 process activity, timeout is the only way we will know. */
4601 set_waiting_for_input (&timeout
);
4603 /* If status of something has changed, and no input is
4604 available, notify the user of the change right away. After
4605 this explicit check, we'll let the SIGCHLD handler zap
4606 timeout to get our attention. */
4607 if (update_tick
!= process_tick
)
4612 if (kbd_on_hold_p ())
4615 Atemp
= input_wait_mask
;
4618 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4619 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4621 #ifdef NON_BLOCKING_CONNECT
4622 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4626 (SELECT_TYPE
*)0, &timeout
)
4629 /* It's okay for us to do this and then continue with
4630 the loop, since timeout has already been zeroed out. */
4631 clear_waiting_for_input ();
4632 status_notify (NULL
);
4633 if (do_display
) redisplay_preserve_echo_area (13);
4637 /* Don't wait for output from a non-running process. Just
4638 read whatever data has already been received. */
4639 if (wait_proc
&& wait_proc
->raw_status_new
)
4640 update_status (wait_proc
);
4642 && ! EQ (wait_proc
->status
, Qrun
)
4643 && ! EQ (wait_proc
->status
, Qconnect
))
4645 int nread
, total_nread
= 0;
4647 clear_waiting_for_input ();
4648 XSETPROCESS (proc
, wait_proc
);
4650 /* Read data from the process, until we exhaust it. */
4651 while (wait_proc
->infd
>= 0)
4653 nread
= read_process_output (proc
, wait_proc
->infd
);
4660 total_nread
+= nread
;
4664 else if (nread
== -1 && EIO
== errno
)
4668 else if (nread
== -1 && EAGAIN
== errno
)
4672 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4676 if (total_nread
> 0 && do_display
)
4677 redisplay_preserve_echo_area (10);
4682 /* Wait till there is something to do */
4684 if (wait_proc
&& just_wait_proc
)
4686 if (wait_proc
->infd
< 0) /* Terminated */
4688 FD_SET (wait_proc
->infd
, &Available
);
4692 else if (!NILP (wait_for_cell
))
4694 Available
= non_process_wait_mask
;
4701 Available
= non_keyboard_wait_mask
;
4703 Available
= input_wait_mask
;
4704 Writeok
= write_mask
;
4705 #ifdef SELECT_CANT_DO_WRITE_MASK
4710 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4713 /* If frame size has changed or the window is newly mapped,
4714 redisplay now, before we start to wait. There is a race
4715 condition here; if a SIGIO arrives between now and the select
4716 and indicates that a frame is trashed, the select may block
4717 displaying a trashed screen. */
4718 if (frame_garbaged
&& do_display
)
4720 clear_waiting_for_input ();
4721 redisplay_preserve_echo_area (11);
4723 set_waiting_for_input (&timeout
);
4727 if (read_kbd
&& detect_input_pending ())
4735 #ifdef ADAPTIVE_READ_BUFFERING
4736 /* Set the timeout for adaptive read buffering if any
4737 process has non-zero read_output_skip and non-zero
4738 read_output_delay, and we are not reading output for a
4739 specific wait_channel. It is not executed if
4740 Vprocess_adaptive_read_buffering is nil. */
4741 if (process_output_skip
&& check_delay
> 0)
4743 int usecs
= EMACS_USECS (timeout
);
4744 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4745 usecs
= READ_OUTPUT_DELAY_MAX
;
4746 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4748 proc
= chan_process
[channel
];
4751 /* Find minimum non-zero read_output_delay among the
4752 processes with non-zero read_output_skip. */
4753 if (XPROCESS (proc
)->read_output_delay
> 0)
4756 if (!XPROCESS (proc
)->read_output_skip
)
4758 FD_CLR (channel
, &Available
);
4759 XPROCESS (proc
)->read_output_skip
= 0;
4760 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4761 usecs
= XPROCESS (proc
)->read_output_delay
;
4764 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4765 process_output_skip
= 0;
4768 #if defined (USE_GTK) || defined (HAVE_GCONF)
4770 #elif defined (HAVE_NS)
4775 (max (max_process_desc
, max_input_desc
) + 1,
4777 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4778 (SELECT_TYPE
*)0, &timeout
);
4783 /* Make C-g and alarm signals set flags again */
4784 clear_waiting_for_input ();
4786 /* If we woke up due to SIGWINCH, actually change size now. */
4787 do_pending_window_change (0);
4789 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4790 /* We wanted the full specified time, so return now. */
4794 if (xerrno
== EINTR
)
4796 else if (xerrno
== EBADF
)
4799 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4800 the child's closure of the pts gives the parent a SIGHUP, and
4801 the ptc file descriptor is automatically closed,
4802 yielding EBADF here or at select() call above.
4803 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4804 in m/ibmrt-aix.h), and here we just ignore the select error.
4805 Cleanup occurs c/o status_notify after SIGCLD. */
4806 no_avail
= 1; /* Cannot depend on values returned */
4812 error ("select error: %s", emacs_strerror (xerrno
));
4817 FD_ZERO (&Available
);
4821 #if 0 /* When polling is used, interrupt_input is 0,
4822 so get_input_pending should read the input.
4823 So this should not be needed. */
4824 /* If we are using polling for input,
4825 and we see input available, make it get read now.
4826 Otherwise it might not actually get read for a second.
4827 And on hpux, since we turn off polling in wait_reading_process_output,
4828 it might never get read at all if we don't spend much time
4829 outside of wait_reading_process_output. */
4830 if (read_kbd
&& interrupt_input
4831 && keyboard_bit_set (&Available
)
4832 && input_polling_used ())
4833 kill (getpid (), SIGALRM
);
4836 /* Check for keyboard input */
4837 /* If there is any, return immediately
4838 to give it higher priority than subprocesses */
4842 int old_timers_run
= timers_run
;
4843 struct buffer
*old_buffer
= current_buffer
;
4844 Lisp_Object old_window
= selected_window
;
4847 if (detect_input_pending_run_timers (do_display
))
4849 swallow_events (do_display
);
4850 if (detect_input_pending_run_timers (do_display
))
4854 /* If a timer has run, this might have changed buffers
4855 an alike. Make read_key_sequence aware of that. */
4856 if (timers_run
!= old_timers_run
4857 && waiting_for_user_input_p
== -1
4858 && (old_buffer
!= current_buffer
4859 || !EQ (old_window
, selected_window
)))
4860 record_asynch_buffer_change ();
4866 /* If there is unread keyboard input, also return. */
4868 && requeued_events_pending_p ())
4871 /* If we are not checking for keyboard input now,
4872 do process events (but don't run any timers).
4873 This is so that X events will be processed.
4874 Otherwise they may have to wait until polling takes place.
4875 That would causes delays in pasting selections, for example.
4877 (We used to do this only if wait_for_cell.) */
4878 if (read_kbd
== 0 && detect_input_pending ())
4880 swallow_events (do_display
);
4881 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4882 if (detect_input_pending ())
4887 /* Exit now if the cell we're waiting for became non-nil. */
4888 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4892 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4893 go read it. This can happen with X on BSD after logging out.
4894 In that case, there really is no input and no SIGIO,
4895 but select says there is input. */
4897 if (read_kbd
&& interrupt_input
4898 && keyboard_bit_set (&Available
) && ! noninteractive
)
4899 kill (getpid (), SIGIO
);
4903 got_some_input
|= nfds
> 0;
4905 /* If checking input just got us a size-change event from X,
4906 obey it now if we should. */
4907 if (read_kbd
|| ! NILP (wait_for_cell
))
4908 do_pending_window_change (0);
4910 /* Check for data from a process. */
4911 if (no_avail
|| nfds
== 0)
4914 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4916 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4917 if (FD_ISSET (channel
, &Available
)
4919 && (d
->condition
& FOR_READ
) != 0)
4920 d
->func (channel
, d
->data
, 1);
4921 if (FD_ISSET (channel
, &write_mask
)
4923 && (d
->condition
& FOR_WRITE
) != 0)
4924 d
->func (channel
, d
->data
, 0);
4927 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4929 if (FD_ISSET (channel
, &Available
)
4930 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4931 && !FD_ISSET (channel
, &non_process_wait_mask
))
4935 /* If waiting for this channel, arrange to return as
4936 soon as no more input to be processed. No more
4938 if (wait_channel
== channel
)
4944 proc
= chan_process
[channel
];
4948 /* If this is a server stream socket, accept connection. */
4949 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4951 server_accept_connection (proc
, channel
);
4955 /* Read data from the process, starting with our
4956 buffered-ahead character if we have one. */
4958 nread
= read_process_output (proc
, channel
);
4961 /* Since read_process_output can run a filter,
4962 which can call accept-process-output,
4963 don't try to read from any other processes
4964 before doing the select again. */
4965 FD_ZERO (&Available
);
4968 redisplay_preserve_echo_area (12);
4971 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4974 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4975 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4977 else if (nread
== -1 && errno
== EAGAIN
)
4981 else if (nread
== -1 && errno
== EAGAIN
)
4983 /* Note that we cannot distinguish between no input
4984 available now and a closed pipe.
4985 With luck, a closed pipe will be accompanied by
4986 subprocess termination and SIGCHLD. */
4987 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4989 #endif /* O_NDELAY */
4990 #endif /* O_NONBLOCK */
4992 /* On some OSs with ptys, when the process on one end of
4993 a pty exits, the other end gets an error reading with
4994 errno = EIO instead of getting an EOF (0 bytes read).
4995 Therefore, if we get an error reading and errno =
4996 EIO, just continue, because the child process has
4997 exited and should clean itself up soon (e.g. when we
5000 However, it has been known to happen that the SIGCHLD
5001 got lost. So raise the signal again just in case.
5003 else if (nread
== -1 && errno
== EIO
)
5005 /* Clear the descriptor now, so we only raise the
5006 signal once. Don't do this if `process' is only
5008 if (XPROCESS (proc
)->pid
!= -2)
5010 FD_CLR (channel
, &input_wait_mask
);
5011 FD_CLR (channel
, &non_keyboard_wait_mask
);
5013 kill (getpid (), SIGCHLD
);
5016 #endif /* HAVE_PTYS */
5017 /* If we can detect process termination, don't consider the process
5018 gone just because its pipe is closed. */
5020 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5025 /* Preserve status of processes already terminated. */
5026 XPROCESS (proc
)->tick
= ++process_tick
;
5027 deactivate_process (proc
);
5028 if (XPROCESS (proc
)->raw_status_new
)
5029 update_status (XPROCESS (proc
));
5030 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5031 XPROCESS (proc
)->status
5032 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5035 #ifdef NON_BLOCKING_CONNECT
5036 if (FD_ISSET (channel
, &Writeok
)
5037 && FD_ISSET (channel
, &connect_wait_mask
))
5039 struct Lisp_Process
*p
;
5041 FD_CLR (channel
, &connect_wait_mask
);
5042 FD_CLR (channel
, &write_mask
);
5043 if (--num_pending_connects
< 0)
5046 proc
= chan_process
[channel
];
5050 p
= XPROCESS (proc
);
5053 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5054 So only use it on systems where it is known to work. */
5056 socklen_t xlen
= sizeof (xerrno
);
5057 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5062 struct sockaddr pname
;
5063 int pnamelen
= sizeof (pname
);
5065 /* If connection failed, getpeername will fail. */
5067 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5069 /* Obtain connect failure code through error slippage. */
5072 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5079 p
->tick
= ++process_tick
;
5080 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
5081 deactivate_process (proc
);
5086 /* Execute the sentinel here. If we had relied on
5087 status_notify to do it later, it will read input
5088 from the process before calling the sentinel. */
5089 exec_sentinel (proc
, build_string ("open\n"));
5090 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5092 FD_SET (p
->infd
, &input_wait_mask
);
5093 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5097 #endif /* NON_BLOCKING_CONNECT */
5098 } /* end for each file descriptor */
5099 } /* end while exit conditions not met */
5101 unbind_to (count
, Qnil
);
5103 /* If calling from keyboard input, do not quit
5104 since we want to return C-g as an input character.
5105 Otherwise, do pending quit if requested. */
5108 /* Prevent input_pending from remaining set if we quit. */
5109 clear_input_pending ();
5113 return got_some_input
;
5116 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5119 read_process_output_call (Lisp_Object fun_and_args
)
5121 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5125 read_process_output_error_handler (Lisp_Object error_val
)
5127 cmd_error_internal (error_val
, "error in process filter: ");
5129 update_echo_area ();
5130 Fsleep_for (make_number (2), Qnil
);
5134 /* Read pending output from the process channel,
5135 starting with our buffered-ahead character if we have one.
5136 Yield number of decoded characters read.
5138 This function reads at most 4096 characters.
5139 If you want to read all available subprocess output,
5140 you must call it repeatedly until it returns zero.
5142 The characters read are decoded according to PROC's coding-system
5146 read_process_output (Lisp_Object proc
, register int channel
)
5148 register int nbytes
;
5150 register Lisp_Object outstream
;
5151 register struct Lisp_Process
*p
= XPROCESS (proc
);
5152 register EMACS_INT opoint
;
5153 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5154 int carryover
= p
->decoding_carryover
;
5156 int count
= SPECPDL_INDEX ();
5157 Lisp_Object odeactivate
;
5159 chars
= (char *) alloca (carryover
+ readmax
);
5161 /* See the comment above. */
5162 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5164 #ifdef DATAGRAM_SOCKETS
5165 /* We have a working select, so proc_buffered_char is always -1. */
5166 if (DATAGRAM_CHAN_P (channel
))
5168 socklen_t len
= datagram_address
[channel
].len
;
5169 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5170 0, datagram_address
[channel
].sa
, &len
);
5174 if (proc_buffered_char
[channel
] < 0)
5177 if (XPROCESS (proc
)->gnutls_p
)
5178 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5179 chars
+ carryover
, readmax
);
5182 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5183 #ifdef ADAPTIVE_READ_BUFFERING
5184 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5186 int delay
= p
->read_output_delay
;
5189 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5192 process_output_delay_count
++;
5193 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5196 else if (delay
> 0 && (nbytes
== readmax
))
5198 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5200 process_output_delay_count
--;
5202 p
->read_output_delay
= delay
;
5205 p
->read_output_skip
= 1;
5206 process_output_skip
= 1;
5213 chars
[carryover
] = proc_buffered_char
[channel
];
5214 proc_buffered_char
[channel
] = -1;
5216 if (XPROCESS (proc
)->gnutls_p
)
5217 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5218 chars
+ carryover
+ 1, readmax
- 1);
5221 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5225 nbytes
= nbytes
+ 1;
5228 p
->decoding_carryover
= 0;
5230 /* At this point, NBYTES holds number of bytes just received
5231 (including the one in proc_buffered_char[channel]). */
5234 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5236 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5239 /* Now set NBYTES how many bytes we must decode. */
5240 nbytes
+= carryover
;
5242 odeactivate
= Vdeactivate_mark
;
5243 /* There's no good reason to let process filters change the current
5244 buffer, and many callers of accept-process-output, sit-for, and
5245 friends don't expect current-buffer to be changed from under them. */
5246 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5248 /* Read and dispose of the process output. */
5249 outstream
= p
->filter
;
5250 if (!NILP (outstream
))
5252 Lisp_Object obuffer
, okeymap
;
5254 int outer_running_asynch_code
= running_asynch_code
;
5255 int waiting
= waiting_for_user_input_p
;
5257 /* No need to gcpro these, because all we do with them later
5258 is test them for EQness, and none of them should be a string. */
5259 XSETBUFFER (obuffer
, current_buffer
);
5260 okeymap
= BVAR (current_buffer
, keymap
);
5262 /* We inhibit quit here instead of just catching it so that
5263 hitting ^G when a filter happens to be running won't screw
5265 specbind (Qinhibit_quit
, Qt
);
5266 specbind (Qlast_nonmenu_event
, Qt
);
5268 /* In case we get recursively called,
5269 and we already saved the match data nonrecursively,
5270 save the same match data in safely recursive fashion. */
5271 if (outer_running_asynch_code
)
5274 /* Don't clobber the CURRENT match data, either! */
5275 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5276 restore_search_regs ();
5277 record_unwind_save_match_data ();
5278 Fset_match_data (tem
, Qt
);
5281 /* For speed, if a search happens within this code,
5282 save the match data in a special nonrecursive fashion. */
5283 running_asynch_code
= 1;
5285 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5286 text
= coding
->dst_object
;
5287 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5288 /* A new coding system might be found. */
5289 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5291 p
->decode_coding_system
= Vlast_coding_system_used
;
5293 /* Don't call setup_coding_system for
5294 proc_decode_coding_system[channel] here. It is done in
5295 detect_coding called via decode_coding above. */
5297 /* If a coding system for encoding is not yet decided, we set
5298 it as the same as coding-system for decoding.
5300 But, before doing that we must check if
5301 proc_encode_coding_system[p->outfd] surely points to a
5302 valid memory because p->outfd will be changed once EOF is
5303 sent to the process. */
5304 if (NILP (p
->encode_coding_system
)
5305 && proc_encode_coding_system
[p
->outfd
])
5307 p
->encode_coding_system
5308 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5309 setup_coding_system (p
->encode_coding_system
,
5310 proc_encode_coding_system
[p
->outfd
]);
5314 if (coding
->carryover_bytes
> 0)
5316 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5317 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5318 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5319 coding
->carryover_bytes
);
5320 p
->decoding_carryover
= coding
->carryover_bytes
;
5322 if (SBYTES (text
) > 0)
5323 internal_condition_case_1 (read_process_output_call
,
5325 Fcons (proc
, Fcons (text
, Qnil
))),
5326 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5327 read_process_output_error_handler
);
5329 /* If we saved the match data nonrecursively, restore it now. */
5330 restore_search_regs ();
5331 running_asynch_code
= outer_running_asynch_code
;
5333 /* Restore waiting_for_user_input_p as it was
5334 when we were called, in case the filter clobbered it. */
5335 waiting_for_user_input_p
= waiting
;
5337 #if 0 /* Call record_asynch_buffer_change unconditionally,
5338 because we might have changed minor modes or other things
5339 that affect key bindings. */
5340 if (! EQ (Fcurrent_buffer (), obuffer
)
5341 || ! EQ (current_buffer
->keymap
, okeymap
))
5343 /* But do it only if the caller is actually going to read events.
5344 Otherwise there's no need to make him wake up, and it could
5345 cause trouble (for example it would make sit_for return). */
5346 if (waiting_for_user_input_p
== -1)
5347 record_asynch_buffer_change ();
5350 /* If no filter, write into buffer if it isn't dead. */
5351 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5353 Lisp_Object old_read_only
;
5354 EMACS_INT old_begv
, old_zv
;
5355 EMACS_INT old_begv_byte
, old_zv_byte
;
5356 EMACS_INT before
, before_byte
;
5357 EMACS_INT opoint_byte
;
5361 Fset_buffer (p
->buffer
);
5363 opoint_byte
= PT_BYTE
;
5364 old_read_only
= BVAR (current_buffer
, read_only
);
5367 old_begv_byte
= BEGV_BYTE
;
5368 old_zv_byte
= ZV_BYTE
;
5370 BVAR (current_buffer
, read_only
) = Qnil
;
5372 /* Insert new output into buffer
5373 at the current end-of-output marker,
5374 thus preserving logical ordering of input and output. */
5375 if (XMARKER (p
->mark
)->buffer
)
5376 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5377 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5380 SET_PT_BOTH (ZV
, ZV_BYTE
);
5382 before_byte
= PT_BYTE
;
5384 /* If the output marker is outside of the visible region, save
5385 the restriction and widen. */
5386 if (! (BEGV
<= PT
&& PT
<= ZV
))
5389 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5390 text
= coding
->dst_object
;
5391 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5392 /* A new coding system might be found. See the comment in the
5393 similar code in the previous `if' block. */
5394 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5396 p
->decode_coding_system
= Vlast_coding_system_used
;
5397 if (NILP (p
->encode_coding_system
)
5398 && proc_encode_coding_system
[p
->outfd
])
5400 p
->encode_coding_system
5401 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5402 setup_coding_system (p
->encode_coding_system
,
5403 proc_encode_coding_system
[p
->outfd
]);
5406 if (coding
->carryover_bytes
> 0)
5408 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5409 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5410 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5411 coding
->carryover_bytes
);
5412 p
->decoding_carryover
= coding
->carryover_bytes
;
5414 /* Adjust the multibyteness of TEXT to that of the buffer. */
5415 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5416 != ! STRING_MULTIBYTE (text
))
5417 text
= (STRING_MULTIBYTE (text
)
5418 ? Fstring_as_unibyte (text
)
5419 : Fstring_to_multibyte (text
));
5420 /* Insert before markers in case we are inserting where
5421 the buffer's mark is, and the user's next command is Meta-y. */
5422 insert_from_string_before_markers (text
, 0, 0,
5423 SCHARS (text
), SBYTES (text
), 0);
5425 /* Make sure the process marker's position is valid when the
5426 process buffer is changed in the signal_after_change above.
5427 W3 is known to do that. */
5428 if (BUFFERP (p
->buffer
)
5429 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5430 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5432 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5434 update_mode_lines
++;
5436 /* Make sure opoint and the old restrictions
5437 float ahead of any new text just as point would. */
5438 if (opoint
>= before
)
5440 opoint
+= PT
- before
;
5441 opoint_byte
+= PT_BYTE
- before_byte
;
5443 if (old_begv
> before
)
5445 old_begv
+= PT
- before
;
5446 old_begv_byte
+= PT_BYTE
- before_byte
;
5448 if (old_zv
>= before
)
5450 old_zv
+= PT
- before
;
5451 old_zv_byte
+= PT_BYTE
- before_byte
;
5454 /* If the restriction isn't what it should be, set it. */
5455 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5456 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5459 BVAR (current_buffer
, read_only
) = old_read_only
;
5460 SET_PT_BOTH (opoint
, opoint_byte
);
5462 /* Handling the process output should not deactivate the mark. */
5463 Vdeactivate_mark
= odeactivate
;
5465 unbind_to (count
, Qnil
);
5469 /* Sending data to subprocess */
5471 jmp_buf send_process_frame
;
5472 Lisp_Object process_sent_to
;
5475 send_process_trap (int ignore
)
5477 SIGNAL_THREAD_CHECK (SIGPIPE
);
5478 sigunblock (sigmask (SIGPIPE
));
5479 longjmp (send_process_frame
, 1);
5482 /* Send some data to process PROC.
5483 BUF is the beginning of the data; LEN is the number of characters.
5484 OBJECT is the Lisp object that the data comes from. If OBJECT is
5485 nil or t, it means that the data comes from C string.
5487 If OBJECT is not nil, the data is encoded by PROC's coding-system
5488 for encoding before it is sent.
5490 This function can evaluate Lisp code and can garbage collect. */
5493 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5494 volatile EMACS_INT len
, volatile Lisp_Object object
)
5496 /* Use volatile to protect variables from being clobbered by longjmp. */
5497 struct Lisp_Process
*p
= XPROCESS (proc
);
5499 struct coding_system
*coding
;
5500 struct gcpro gcpro1
;
5501 void (*volatile old_sigpipe
) (int);
5505 if (p
->raw_status_new
)
5507 if (! EQ (p
->status
, Qrun
))
5508 error ("Process %s not running", SDATA (p
->name
));
5510 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5512 coding
= proc_encode_coding_system
[p
->outfd
];
5513 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5515 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5516 || (BUFFERP (object
)
5517 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5520 p
->encode_coding_system
5521 = complement_process_encoding_system (p
->encode_coding_system
);
5522 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5524 /* The coding system for encoding was changed to raw-text
5525 because we sent a unibyte text previously. Now we are
5526 sending a multibyte text, thus we must encode it by the
5527 original coding system specified for the current process.
5529 Another reason we comming here is that the coding system
5530 was just complemented and new one was returned by
5531 complement_process_encoding_system. */
5532 setup_coding_system (p
->encode_coding_system
, coding
);
5533 Vlast_coding_system_used
= p
->encode_coding_system
;
5535 coding
->src_multibyte
= 1;
5539 /* For sending a unibyte text, character code conversion should
5540 not take place but EOL conversion should. So, setup raw-text
5541 or one of the subsidiary if we have not yet done it. */
5542 if (CODING_REQUIRE_ENCODING (coding
))
5544 if (CODING_REQUIRE_FLUSHING (coding
))
5546 /* But, before changing the coding, we must flush out data. */
5547 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5548 send_process (proc
, "", 0, Qt
);
5549 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5551 setup_coding_system (raw_text_coding_system
5552 (Vlast_coding_system_used
),
5554 coding
->src_multibyte
= 0;
5557 coding
->dst_multibyte
= 0;
5559 if (CODING_REQUIRE_ENCODING (coding
))
5561 coding
->dst_object
= Qt
;
5562 if (BUFFERP (object
))
5564 EMACS_INT from_byte
, from
, to
;
5565 EMACS_INT save_pt
, save_pt_byte
;
5566 struct buffer
*cur
= current_buffer
;
5568 set_buffer_internal (XBUFFER (object
));
5569 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5571 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5572 from
= BYTE_TO_CHAR (from_byte
);
5573 to
= BYTE_TO_CHAR (from_byte
+ len
);
5574 TEMP_SET_PT_BOTH (from
, from_byte
);
5575 encode_coding_object (coding
, object
, from
, from_byte
,
5576 to
, from_byte
+ len
, Qt
);
5577 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5578 set_buffer_internal (cur
);
5580 else if (STRINGP (object
))
5582 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5583 SBYTES (object
), Qt
);
5587 coding
->dst_object
= make_unibyte_string (buf
, len
);
5588 coding
->produced
= len
;
5591 len
= coding
->produced
;
5592 object
= coding
->dst_object
;
5593 buf
= SSDATA (object
);
5596 if (pty_max_bytes
== 0)
5598 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5599 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5600 if (pty_max_bytes
< 0)
5601 pty_max_bytes
= 250;
5603 pty_max_bytes
= 250;
5605 /* Deduct one, to leave space for the eof. */
5609 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5610 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5611 when returning with longjmp despite being declared volatile. */
5612 if (!setjmp (send_process_frame
))
5614 process_sent_to
= proc
;
5617 EMACS_INT
this = len
;
5619 /* Send this batch, using one or more write calls. */
5622 int outfd
= p
->outfd
;
5623 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5624 #ifdef DATAGRAM_SOCKETS
5625 if (DATAGRAM_CHAN_P (outfd
))
5627 rv
= sendto (outfd
, buf
, this,
5628 0, datagram_address
[outfd
].sa
,
5629 datagram_address
[outfd
].len
);
5630 if (rv
< 0 && errno
== EMSGSIZE
)
5632 signal (SIGPIPE
, old_sigpipe
);
5633 report_file_error ("sending datagram",
5634 Fcons (proc
, Qnil
));
5641 if (XPROCESS (proc
)->gnutls_p
)
5642 rv
= emacs_gnutls_write (outfd
,
5647 rv
= emacs_write (outfd
, buf
, this);
5648 #ifdef ADAPTIVE_READ_BUFFERING
5649 if (p
->read_output_delay
> 0
5650 && p
->adaptive_read_buffering
== 1)
5652 p
->read_output_delay
= 0;
5653 process_output_delay_count
--;
5654 p
->read_output_skip
= 0;
5658 signal (SIGPIPE
, old_sigpipe
);
5664 || errno
== EWOULDBLOCK
5670 /* Buffer is full. Wait, accepting input;
5671 that may allow the program
5672 to finish doing output and read more. */
5676 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5677 /* A gross hack to work around a bug in FreeBSD.
5678 In the following sequence, read(2) returns
5682 write(2) 954 bytes, get EAGAIN
5683 read(2) 1024 bytes in process_read_output
5684 read(2) 11 bytes in process_read_output
5686 That is, read(2) returns more bytes than have
5687 ever been written successfully. The 1033 bytes
5688 read are the 1022 bytes written successfully
5689 after processing (for example with CRs added if
5690 the terminal is set up that way which it is
5691 here). The same bytes will be seen again in a
5692 later read(2), without the CRs. */
5694 if (errno
== EAGAIN
)
5697 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5699 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5701 /* Running filters might relocate buffers or strings.
5702 Arrange to relocate BUF. */
5703 if (BUFFERP (object
))
5704 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5705 (unsigned char *) buf
);
5706 else if (STRINGP (object
))
5707 offset
= buf
- SSDATA (object
);
5709 #ifdef EMACS_HAS_USECS
5710 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5712 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5715 if (BUFFERP (object
))
5716 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5718 else if (STRINGP (object
))
5719 buf
= offset
+ SSDATA (object
);
5724 /* This is a real error. */
5725 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5735 signal (SIGPIPE
, old_sigpipe
);
5736 proc
= process_sent_to
;
5737 p
= XPROCESS (proc
);
5738 p
->raw_status_new
= 0;
5739 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5740 p
->tick
= ++process_tick
;
5741 deactivate_process (proc
);
5742 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5748 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5750 doc
: /* Send current contents of region as input to PROCESS.
5751 PROCESS may be a process, a buffer, the name of a process or buffer, or
5752 nil, indicating the current buffer's process.
5753 Called from program, takes three arguments, PROCESS, START and END.
5754 If the region is more than 500 characters long,
5755 it is sent in several bunches. This may happen even for shorter regions.
5756 Output from processes can arrive in between bunches. */)
5757 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5760 EMACS_INT start1
, end1
;
5762 proc
= get_process (process
);
5763 validate_region (&start
, &end
);
5765 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5766 move_gap (XINT (start
));
5768 start1
= CHAR_TO_BYTE (XINT (start
));
5769 end1
= CHAR_TO_BYTE (XINT (end
));
5770 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5771 Fcurrent_buffer ());
5776 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5778 doc
: /* Send PROCESS the contents of STRING as input.
5779 PROCESS may be a process, a buffer, the name of a process or buffer, or
5780 nil, indicating the current buffer's process.
5781 If STRING is more than 500 characters long,
5782 it is sent in several bunches. This may happen even for shorter strings.
5783 Output from processes can arrive in between bunches. */)
5784 (Lisp_Object process
, Lisp_Object string
)
5787 CHECK_STRING (string
);
5788 proc
= get_process (process
);
5789 send_process (proc
, SSDATA (string
),
5790 SBYTES (string
), string
);
5794 /* Return the foreground process group for the tty/pty that
5795 the process P uses. */
5797 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5802 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5805 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5806 master side. Try the slave side. */
5807 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5811 ioctl (fd
, TIOCGPGRP
, &gid
);
5815 #endif /* defined (TIOCGPGRP ) */
5820 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5821 Sprocess_running_child_p
, 0, 1, 0,
5822 doc
: /* Return t if PROCESS has given the terminal to a child.
5823 If the operating system does not make it possible to find out,
5824 return t unconditionally. */)
5825 (Lisp_Object process
)
5827 /* Initialize in case ioctl doesn't exist or gives an error,
5828 in a way that will cause returning t. */
5831 struct Lisp_Process
*p
;
5833 proc
= get_process (process
);
5834 p
= XPROCESS (proc
);
5836 if (!EQ (p
->type
, Qreal
))
5837 error ("Process %s is not a subprocess",
5840 error ("Process %s is not active",
5843 gid
= emacs_get_tty_pgrp (p
);
5850 /* send a signal number SIGNO to PROCESS.
5851 If CURRENT_GROUP is t, that means send to the process group
5852 that currently owns the terminal being used to communicate with PROCESS.
5853 This is used for various commands in shell mode.
5854 If CURRENT_GROUP is lambda, that means send to the process group
5855 that currently owns the terminal, but only if it is NOT the shell itself.
5857 If NOMSG is zero, insert signal-announcements into process's buffers
5860 If we can, we try to signal PROCESS by sending control characters
5861 down the pty. This allows us to signal inferiors who have changed
5862 their uid, for which killpg would return an EPERM error. */
5865 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5869 register struct Lisp_Process
*p
;
5873 proc
= get_process (process
);
5874 p
= XPROCESS (proc
);
5876 if (!EQ (p
->type
, Qreal
))
5877 error ("Process %s is not a subprocess",
5880 error ("Process %s is not active",
5884 current_group
= Qnil
;
5886 /* If we are using pgrps, get a pgrp number and make it negative. */
5887 if (NILP (current_group
))
5888 /* Send the signal to the shell's process group. */
5892 #ifdef SIGNALS_VIA_CHARACTERS
5893 /* If possible, send signals to the entire pgrp
5894 by sending an input character to it. */
5897 cc_t
*sig_char
= NULL
;
5899 tcgetattr (p
->infd
, &t
);
5904 sig_char
= &t
.c_cc
[VINTR
];
5908 sig_char
= &t
.c_cc
[VQUIT
];
5912 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5913 sig_char
= &t
.c_cc
[VSWTCH
];
5915 sig_char
= &t
.c_cc
[VSUSP
];
5920 if (sig_char
&& *sig_char
!= CDISABLE
)
5922 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5925 /* If we can't send the signal with a character,
5926 fall through and send it another way. */
5928 /* The code above may fall through if it can't
5929 handle the signal. */
5930 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5933 /* Get the current pgrp using the tty itself, if we have that.
5934 Otherwise, use the pty to get the pgrp.
5935 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5936 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5937 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5938 His patch indicates that if TIOCGPGRP returns an error, then
5939 we should just assume that p->pid is also the process group id. */
5941 gid
= emacs_get_tty_pgrp (p
);
5944 /* If we can't get the information, assume
5945 the shell owns the tty. */
5948 /* It is not clear whether anything really can set GID to -1.
5949 Perhaps on some system one of those ioctls can or could do so.
5950 Or perhaps this is vestigial. */
5953 #else /* ! defined (TIOCGPGRP ) */
5954 /* Can't select pgrps on this system, so we know that
5955 the child itself heads the pgrp. */
5957 #endif /* ! defined (TIOCGPGRP ) */
5959 /* If current_group is lambda, and the shell owns the terminal,
5960 don't send any signal. */
5961 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5969 p
->raw_status_new
= 0;
5971 p
->tick
= ++process_tick
;
5974 status_notify (NULL
);
5975 redisplay_preserve_echo_area (13);
5978 #endif /* ! defined (SIGCONT) */
5982 flush_pending_output (p
->infd
);
5986 /* If we don't have process groups, send the signal to the immediate
5987 subprocess. That isn't really right, but it's better than any
5988 obvious alternative. */
5991 kill (p
->pid
, signo
);
5995 /* gid may be a pid, or minus a pgrp's number */
5997 if (!NILP (current_group
))
5999 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6000 EMACS_KILLPG (gid
, signo
);
6007 #else /* ! defined (TIOCSIGSEND) */
6008 EMACS_KILLPG (gid
, signo
);
6009 #endif /* ! defined (TIOCSIGSEND) */
6012 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6013 doc
: /* Interrupt process PROCESS.
6014 PROCESS may be a process, a buffer, or the name of a process or buffer.
6015 No arg or nil means current buffer's process.
6016 Second arg CURRENT-GROUP non-nil means send signal to
6017 the current process-group of the process's controlling terminal
6018 rather than to the process's own process group.
6019 If the process is a shell, this means interrupt current subjob
6020 rather than the shell.
6022 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6023 don't send the signal. */)
6024 (Lisp_Object process
, Lisp_Object current_group
)
6026 process_send_signal (process
, SIGINT
, current_group
, 0);
6030 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6031 doc
: /* Kill process PROCESS. May be process or name of one.
6032 See function `interrupt-process' for more details on usage. */)
6033 (Lisp_Object process
, Lisp_Object current_group
)
6035 process_send_signal (process
, SIGKILL
, current_group
, 0);
6039 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6040 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6041 See function `interrupt-process' for more details on usage. */)
6042 (Lisp_Object process
, Lisp_Object current_group
)
6044 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6048 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6049 doc
: /* Stop process PROCESS. May be process or name of one.
6050 See function `interrupt-process' for more details on usage.
6051 If PROCESS is a network or serial process, inhibit handling of incoming
6053 (Lisp_Object process
, Lisp_Object current_group
)
6055 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6057 struct Lisp_Process
*p
;
6059 p
= XPROCESS (process
);
6060 if (NILP (p
->command
)
6063 FD_CLR (p
->infd
, &input_wait_mask
);
6064 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6070 error ("No SIGTSTP support");
6072 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6077 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6078 doc
: /* Continue process PROCESS. May be process or name of one.
6079 See function `interrupt-process' for more details on usage.
6080 If PROCESS is a network or serial process, resume handling of incoming
6082 (Lisp_Object process
, Lisp_Object current_group
)
6084 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6086 struct Lisp_Process
*p
;
6088 p
= XPROCESS (process
);
6089 if (EQ (p
->command
, Qt
)
6091 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6093 FD_SET (p
->infd
, &input_wait_mask
);
6094 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6096 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6097 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6098 #else /* not WINDOWSNT */
6099 tcflush (p
->infd
, TCIFLUSH
);
6100 #endif /* not WINDOWSNT */
6106 process_send_signal (process
, SIGCONT
, current_group
, 0);
6108 error ("No SIGCONT support");
6113 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6114 2, 2, "sProcess (name or number): \nnSignal code: ",
6115 doc
: /* Send PROCESS the signal with code SIGCODE.
6116 PROCESS may also be a number specifying the process id of the
6117 process to signal; in this case, the process need not be a child of
6119 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6120 (Lisp_Object process
, Lisp_Object sigcode
)
6124 if (INTEGERP (process
))
6126 pid
= XINT (process
);
6130 if (FLOATP (process
))
6132 pid
= (pid_t
) XFLOAT_DATA (process
);
6136 if (STRINGP (process
))
6139 if (tem
= Fget_process (process
), NILP (tem
))
6141 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6148 process
= get_process (process
);
6153 CHECK_PROCESS (process
);
6154 pid
= XPROCESS (process
)->pid
;
6156 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6160 #define parse_signal(NAME, VALUE) \
6161 else if (!xstrcasecmp (name, NAME)) \
6162 XSETINT (sigcode, VALUE)
6164 if (INTEGERP (sigcode
))
6170 CHECK_SYMBOL (sigcode
);
6171 name
= SSDATA (SYMBOL_NAME (sigcode
));
6173 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6179 parse_signal ("usr1", SIGUSR1
);
6182 parse_signal ("usr2", SIGUSR2
);
6185 parse_signal ("term", SIGTERM
);
6188 parse_signal ("hup", SIGHUP
);
6191 parse_signal ("int", SIGINT
);
6194 parse_signal ("quit", SIGQUIT
);
6197 parse_signal ("ill", SIGILL
);
6200 parse_signal ("abrt", SIGABRT
);
6203 parse_signal ("emt", SIGEMT
);
6206 parse_signal ("kill", SIGKILL
);
6209 parse_signal ("fpe", SIGFPE
);
6212 parse_signal ("bus", SIGBUS
);
6215 parse_signal ("segv", SIGSEGV
);
6218 parse_signal ("sys", SIGSYS
);
6221 parse_signal ("pipe", SIGPIPE
);
6224 parse_signal ("alrm", SIGALRM
);
6227 parse_signal ("urg", SIGURG
);
6230 parse_signal ("stop", SIGSTOP
);
6233 parse_signal ("tstp", SIGTSTP
);
6236 parse_signal ("cont", SIGCONT
);
6239 parse_signal ("chld", SIGCHLD
);
6242 parse_signal ("ttin", SIGTTIN
);
6245 parse_signal ("ttou", SIGTTOU
);
6248 parse_signal ("io", SIGIO
);
6251 parse_signal ("xcpu", SIGXCPU
);
6254 parse_signal ("xfsz", SIGXFSZ
);
6257 parse_signal ("vtalrm", SIGVTALRM
);
6260 parse_signal ("prof", SIGPROF
);
6263 parse_signal ("winch", SIGWINCH
);
6266 parse_signal ("info", SIGINFO
);
6269 error ("Undefined signal name %s", name
);
6274 return make_number (kill (pid
, XINT (sigcode
)));
6277 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6278 doc
: /* Make PROCESS see end-of-file in its input.
6279 EOF comes after any text already sent to it.
6280 PROCESS may be a process, a buffer, the name of a process or buffer, or
6281 nil, indicating the current buffer's process.
6282 If PROCESS is a network connection, or is a process communicating
6283 through a pipe (as opposed to a pty), then you cannot send any more
6284 text to PROCESS after you call this function.
6285 If PROCESS is a serial process, wait until all output written to the
6286 process has been transmitted to the serial port. */)
6287 (Lisp_Object process
)
6290 struct coding_system
*coding
;
6292 if (DATAGRAM_CONN_P (process
))
6295 proc
= get_process (process
);
6296 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6298 /* Make sure the process is really alive. */
6299 if (XPROCESS (proc
)->raw_status_new
)
6300 update_status (XPROCESS (proc
));
6301 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6302 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6304 if (CODING_REQUIRE_FLUSHING (coding
))
6306 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6307 send_process (proc
, "", 0, Qnil
);
6310 if (XPROCESS (proc
)->pty_flag
)
6311 send_process (proc
, "\004", 1, Qnil
);
6312 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6315 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6316 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6317 #endif /* not WINDOWSNT */
6318 /* Do nothing on Windows because writes are blocking. */
6322 int old_outfd
, new_outfd
;
6324 #ifdef HAVE_SHUTDOWN
6325 /* If this is a network connection, or socketpair is used
6326 for communication with the subprocess, call shutdown to cause EOF.
6327 (In some old system, shutdown to socketpair doesn't work.
6328 Then we just can't win.) */
6329 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6330 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6331 shutdown (XPROCESS (proc
)->outfd
, 1);
6332 /* In case of socketpair, outfd == infd, so don't close it. */
6333 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6334 emacs_close (XPROCESS (proc
)->outfd
);
6335 #else /* not HAVE_SHUTDOWN */
6336 emacs_close (XPROCESS (proc
)->outfd
);
6337 #endif /* not HAVE_SHUTDOWN */
6338 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6341 old_outfd
= XPROCESS (proc
)->outfd
;
6343 if (!proc_encode_coding_system
[new_outfd
])
6344 proc_encode_coding_system
[new_outfd
]
6345 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6346 memcpy (proc_encode_coding_system
[new_outfd
],
6347 proc_encode_coding_system
[old_outfd
],
6348 sizeof (struct coding_system
));
6349 memset (proc_encode_coding_system
[old_outfd
], 0,
6350 sizeof (struct coding_system
));
6352 XPROCESS (proc
)->outfd
= new_outfd
;
6357 /* On receipt of a signal that a child status has changed, loop asking
6358 about children with changed statuses until the system says there
6361 All we do is change the status; we do not run sentinels or print
6362 notifications. That is saved for the next time keyboard input is
6363 done, in order to avoid timing errors.
6365 ** WARNING: this can be called during garbage collection.
6366 Therefore, it must not be fooled by the presence of mark bits in
6369 ** USG WARNING: Although it is not obvious from the documentation
6370 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6371 signal() before executing at least one wait(), otherwise the
6372 handler will be called again, resulting in an infinite loop. The
6373 relevant portion of the documentation reads "SIGCLD signals will be
6374 queued and the signal-catching function will be continually
6375 reentered until the queue is empty". Invoking signal() causes the
6376 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6379 ** Malloc WARNING: This should never call malloc either directly or
6380 indirectly; if it does, that is a bug */
6384 sigchld_handler (int signo
)
6386 int old_errno
= errno
;
6388 struct Lisp_Process
*p
;
6390 SIGNAL_THREAD_CHECK (signo
);
6401 #endif /* no WUNTRACED */
6402 /* Keep trying to get a status until we get a definitive result. */
6406 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6408 while (pid
< 0 && errno
== EINTR
);
6412 /* PID == 0 means no processes found, PID == -1 means a real
6413 failure. We have done all our job, so return. */
6420 #endif /* no WNOHANG */
6422 /* Find the process that signaled us, and record its status. */
6424 /* The process can have been deleted by Fdelete_process. */
6425 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6427 Lisp_Object xpid
= XCAR (tail
);
6428 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6429 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6431 XSETCAR (tail
, Qnil
);
6432 goto sigchld_end_of_loop
;
6436 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6438 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6440 proc
= XCDR (XCAR (tail
));
6441 p
= XPROCESS (proc
);
6442 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6447 /* Look for an asynchronous process whose pid hasn't been filled
6450 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6452 proc
= XCDR (XCAR (tail
));
6453 p
= XPROCESS (proc
);
6459 /* Change the status of the process that was found. */
6462 int clear_desc_flag
= 0;
6464 p
->tick
= ++process_tick
;
6466 p
->raw_status_new
= 1;
6468 /* If process has terminated, stop waiting for its output. */
6469 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6471 clear_desc_flag
= 1;
6473 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6474 if (clear_desc_flag
)
6476 FD_CLR (p
->infd
, &input_wait_mask
);
6477 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6480 /* Tell wait_reading_process_output that it needs to wake up and
6482 if (input_available_clear_time
)
6483 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6486 /* There was no asynchronous process found for that pid: we have
6487 a synchronous process. */
6490 synch_process_alive
= 0;
6492 /* Report the status of the synchronous process. */
6494 synch_process_retcode
= WRETCODE (w
);
6495 else if (WIFSIGNALED (w
))
6496 synch_process_termsig
= WTERMSIG (w
);
6498 /* Tell wait_reading_process_output that it needs to wake up and
6500 if (input_available_clear_time
)
6501 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6504 sigchld_end_of_loop
:
6507 /* On some systems, we must return right away.
6508 If any more processes want to signal us, we will
6510 Otherwise (on systems that have WNOHANG), loop around
6511 to use up all the processes that have something to tell us. */
6512 #if (defined WINDOWSNT \
6513 || (defined USG && !defined GNU_LINUX \
6514 && !(defined HPUX && defined WNOHANG)))
6517 #endif /* USG, but not HPUX with WNOHANG */
6520 #endif /* SIGCHLD */
6524 exec_sentinel_unwind (Lisp_Object data
)
6526 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6531 exec_sentinel_error_handler (Lisp_Object error_val
)
6533 cmd_error_internal (error_val
, "error in process sentinel: ");
6535 update_echo_area ();
6536 Fsleep_for (make_number (2), Qnil
);
6541 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6543 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6544 register struct Lisp_Process
*p
= XPROCESS (proc
);
6545 int count
= SPECPDL_INDEX ();
6546 int outer_running_asynch_code
= running_asynch_code
;
6547 int waiting
= waiting_for_user_input_p
;
6549 if (inhibit_sentinels
)
6552 /* No need to gcpro these, because all we do with them later
6553 is test them for EQness, and none of them should be a string. */
6554 odeactivate
= Vdeactivate_mark
;
6555 XSETBUFFER (obuffer
, current_buffer
);
6556 okeymap
= BVAR (current_buffer
, keymap
);
6558 /* There's no good reason to let sentinels change the current
6559 buffer, and many callers of accept-process-output, sit-for, and
6560 friends don't expect current-buffer to be changed from under them. */
6561 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6563 sentinel
= p
->sentinel
;
6564 if (NILP (sentinel
))
6567 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6568 assure that it gets restored no matter how the sentinel exits. */
6570 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6571 /* Inhibit quit so that random quits don't screw up a running filter. */
6572 specbind (Qinhibit_quit
, Qt
);
6573 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6575 /* In case we get recursively called,
6576 and we already saved the match data nonrecursively,
6577 save the same match data in safely recursive fashion. */
6578 if (outer_running_asynch_code
)
6581 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6582 restore_search_regs ();
6583 record_unwind_save_match_data ();
6584 Fset_match_data (tem
, Qt
);
6587 /* For speed, if a search happens within this code,
6588 save the match data in a special nonrecursive fashion. */
6589 running_asynch_code
= 1;
6591 internal_condition_case_1 (read_process_output_call
,
6593 Fcons (proc
, Fcons (reason
, Qnil
))),
6594 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6595 exec_sentinel_error_handler
);
6597 /* If we saved the match data nonrecursively, restore it now. */
6598 restore_search_regs ();
6599 running_asynch_code
= outer_running_asynch_code
;
6601 Vdeactivate_mark
= odeactivate
;
6603 /* Restore waiting_for_user_input_p as it was
6604 when we were called, in case the filter clobbered it. */
6605 waiting_for_user_input_p
= waiting
;
6608 if (! EQ (Fcurrent_buffer (), obuffer
)
6609 || ! EQ (current_buffer
->keymap
, okeymap
))
6611 /* But do it only if the caller is actually going to read events.
6612 Otherwise there's no need to make him wake up, and it could
6613 cause trouble (for example it would make sit_for return). */
6614 if (waiting_for_user_input_p
== -1)
6615 record_asynch_buffer_change ();
6617 unbind_to (count
, Qnil
);
6620 /* Report all recent events of a change in process status
6621 (either run the sentinel or output a message).
6622 This is usually done while Emacs is waiting for keyboard input
6623 but can be done at other times. */
6626 status_notify (struct Lisp_Process
*deleting_process
)
6628 register Lisp_Object proc
, buffer
;
6629 Lisp_Object tail
, msg
;
6630 struct gcpro gcpro1
, gcpro2
;
6634 /* We need to gcpro tail; if read_process_output calls a filter
6635 which deletes a process and removes the cons to which tail points
6636 from Vprocess_alist, and then causes a GC, tail is an unprotected
6640 /* Set this now, so that if new processes are created by sentinels
6641 that we run, we get called again to handle their status changes. */
6642 update_tick
= process_tick
;
6644 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6647 register struct Lisp_Process
*p
;
6649 proc
= Fcdr (XCAR (tail
));
6650 p
= XPROCESS (proc
);
6652 if (p
->tick
!= p
->update_tick
)
6654 p
->update_tick
= p
->tick
;
6656 /* If process is still active, read any output that remains. */
6657 while (! EQ (p
->filter
, Qt
)
6658 && ! EQ (p
->status
, Qconnect
)
6659 && ! EQ (p
->status
, Qlisten
)
6660 /* Network or serial process not stopped: */
6661 && ! EQ (p
->command
, Qt
)
6663 && p
!= deleting_process
6664 && read_process_output (proc
, p
->infd
) > 0);
6668 /* Get the text to use for the message. */
6669 if (p
->raw_status_new
)
6671 msg
= status_message (p
);
6673 /* If process is terminated, deactivate it or delete it. */
6675 if (CONSP (p
->status
))
6676 symbol
= XCAR (p
->status
);
6678 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6679 || EQ (symbol
, Qclosed
))
6681 if (delete_exited_processes
)
6682 remove_process (proc
);
6684 deactivate_process (proc
);
6687 /* The actions above may have further incremented p->tick.
6688 So set p->update_tick again
6689 so that an error in the sentinel will not cause
6690 this code to be run again. */
6691 p
->update_tick
= p
->tick
;
6692 /* Now output the message suitably. */
6693 if (!NILP (p
->sentinel
))
6694 exec_sentinel (proc
, msg
);
6695 /* Don't bother with a message in the buffer
6696 when a process becomes runnable. */
6697 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6700 struct buffer
*old
= current_buffer
;
6701 EMACS_INT opoint
, opoint_byte
;
6702 EMACS_INT before
, before_byte
;
6704 /* Avoid error if buffer is deleted
6705 (probably that's why the process is dead, too) */
6706 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6708 Fset_buffer (buffer
);
6711 opoint_byte
= PT_BYTE
;
6712 /* Insert new output into buffer
6713 at the current end-of-output marker,
6714 thus preserving logical ordering of input and output. */
6715 if (XMARKER (p
->mark
)->buffer
)
6716 Fgoto_char (p
->mark
);
6718 SET_PT_BOTH (ZV
, ZV_BYTE
);
6721 before_byte
= PT_BYTE
;
6723 tem
= BVAR (current_buffer
, read_only
);
6724 BVAR (current_buffer
, read_only
) = Qnil
;
6725 insert_string ("\nProcess ");
6726 Finsert (1, &p
->name
);
6727 insert_string (" ");
6729 BVAR (current_buffer
, read_only
) = tem
;
6730 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6732 if (opoint
>= before
)
6733 SET_PT_BOTH (opoint
+ (PT
- before
),
6734 opoint_byte
+ (PT_BYTE
- before_byte
));
6736 SET_PT_BOTH (opoint
, opoint_byte
);
6738 set_buffer_internal (old
);
6743 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6748 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6749 Sset_process_coding_system
, 1, 3, 0,
6750 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6751 DECODING will be used to decode subprocess output and ENCODING to
6752 encode subprocess input. */)
6753 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6755 register struct Lisp_Process
*p
;
6757 CHECK_PROCESS (process
);
6758 p
= XPROCESS (process
);
6760 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6762 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6763 Fcheck_coding_system (decoding
);
6764 Fcheck_coding_system (encoding
);
6765 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6766 p
->decode_coding_system
= decoding
;
6767 p
->encode_coding_system
= encoding
;
6768 setup_process_coding_systems (process
);
6773 DEFUN ("process-coding-system",
6774 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6775 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6776 (register Lisp_Object process
)
6778 CHECK_PROCESS (process
);
6779 return Fcons (XPROCESS (process
)->decode_coding_system
,
6780 XPROCESS (process
)->encode_coding_system
);
6783 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6784 Sset_process_filter_multibyte
, 2, 2, 0,
6785 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6786 If FLAG is non-nil, the filter is given multibyte strings.
6787 If FLAG is nil, the filter is given unibyte strings. In this case,
6788 all character code conversion except for end-of-line conversion is
6790 (Lisp_Object process
, Lisp_Object flag
)
6792 register struct Lisp_Process
*p
;
6794 CHECK_PROCESS (process
);
6795 p
= XPROCESS (process
);
6797 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6798 setup_process_coding_systems (process
);
6803 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6804 Sprocess_filter_multibyte_p
, 1, 1, 0,
6805 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6806 (Lisp_Object process
)
6808 register struct Lisp_Process
*p
;
6809 struct coding_system
*coding
;
6811 CHECK_PROCESS (process
);
6812 p
= XPROCESS (process
);
6813 coding
= proc_decode_coding_system
[p
->infd
];
6814 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6821 add_gpm_wait_descriptor (int desc
)
6823 add_keyboard_wait_descriptor (desc
);
6827 delete_gpm_wait_descriptor (int desc
)
6829 delete_keyboard_wait_descriptor (desc
);
6832 /* Return nonzero if *MASK has a bit set
6833 that corresponds to one of the keyboard input descriptors. */
6836 keyboard_bit_set (fd_set
*mask
)
6840 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6841 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6842 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6848 #else /* not subprocesses */
6850 /* Defined on msdos.c. */
6851 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6854 /* Implementation of wait_reading_process_output, assuming that there
6855 are no subprocesses. Used only by the MS-DOS build.
6857 Wait for timeout to elapse and/or keyboard input to be available.
6860 timeout in seconds, or
6861 zero for no limit, or
6862 -1 means gobble data immediately available but don't wait for any.
6864 read_kbd is a Lisp_Object:
6865 0 to ignore keyboard input, or
6866 1 to return when input is available, or
6867 -1 means caller will actually read the input, so don't throw to
6870 see full version for other parameters. We know that wait_proc will
6871 always be NULL, since `subprocesses' isn't defined.
6873 do_display != 0 means redisplay should be done to show subprocess
6874 output that arrives.
6876 Return true if we received input from any process. */
6879 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6881 Lisp_Object wait_for_cell
,
6882 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6885 EMACS_TIME end_time
, timeout
;
6886 SELECT_TYPE waitchannels
;
6889 /* What does time_limit really mean? */
6890 if (time_limit
|| microsecs
)
6892 EMACS_GET_TIME (end_time
);
6893 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6894 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6897 /* Turn off periodic alarms (in case they are in use)
6898 and then turn off any other atimers,
6899 because the select emulator uses alarms. */
6901 turn_on_atimers (0);
6905 int timeout_reduced_for_timers
= 0;
6907 /* If calling from keyboard input, do not quit
6908 since we want to return C-g as an input character.
6909 Otherwise, do pending quit if requested. */
6913 /* Exit now if the cell we're waiting for became non-nil. */
6914 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6917 /* Compute time from now till when time limit is up */
6918 /* Exit if already run out */
6919 if (time_limit
== -1)
6921 /* -1 specified for timeout means
6922 gobble output available now
6923 but don't wait at all. */
6925 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6927 else if (time_limit
|| microsecs
)
6929 EMACS_GET_TIME (timeout
);
6930 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6931 if (EMACS_TIME_NEG_P (timeout
))
6936 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6939 /* If our caller will not immediately handle keyboard events,
6940 run timer events directly.
6941 (Callers that will immediately read keyboard events
6942 call timer_delay on their own.) */
6943 if (NILP (wait_for_cell
))
6945 EMACS_TIME timer_delay
;
6949 int old_timers_run
= timers_run
;
6950 timer_delay
= timer_check ();
6951 if (timers_run
!= old_timers_run
&& do_display
)
6952 /* We must retry, since a timer may have requeued itself
6953 and that could alter the time delay. */
6954 redisplay_preserve_echo_area (14);
6958 while (!detect_input_pending ());
6960 /* If there is unread keyboard input, also return. */
6962 && requeued_events_pending_p ())
6965 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6967 EMACS_TIME difference
;
6968 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6969 if (EMACS_TIME_NEG_P (difference
))
6971 timeout
= timer_delay
;
6972 timeout_reduced_for_timers
= 1;
6977 /* Cause C-g and alarm signals to take immediate action,
6978 and cause input available signals to zero out timeout. */
6980 set_waiting_for_input (&timeout
);
6982 /* Wait till there is something to do. */
6984 if (! read_kbd
&& NILP (wait_for_cell
))
6985 FD_ZERO (&waitchannels
);
6987 FD_SET (0, &waitchannels
);
6989 /* If a frame has been newly mapped and needs updating,
6990 reprocess its display stuff. */
6991 if (frame_garbaged
&& do_display
)
6993 clear_waiting_for_input ();
6994 redisplay_preserve_echo_area (15);
6996 set_waiting_for_input (&timeout
);
6999 if (read_kbd
&& detect_input_pending ())
7002 FD_ZERO (&waitchannels
);
7005 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7010 /* Make C-g and alarm signals set flags again */
7011 clear_waiting_for_input ();
7013 /* If we woke up due to SIGWINCH, actually change size now. */
7014 do_pending_window_change (0);
7016 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7017 /* We waited the full specified time, so return now. */
7022 /* If the system call was interrupted, then go around the
7024 if (xerrno
== EINTR
)
7025 FD_ZERO (&waitchannels
);
7027 error ("select error: %s", emacs_strerror (xerrno
));
7030 /* Check for keyboard input */
7033 && detect_input_pending_run_timers (do_display
))
7035 swallow_events (do_display
);
7036 if (detect_input_pending_run_timers (do_display
))
7040 /* If there is unread keyboard input, also return. */
7042 && requeued_events_pending_p ())
7045 /* If wait_for_cell. check for keyboard input
7046 but don't run any timers.
7047 ??? (It seems wrong to me to check for keyboard
7048 input at all when wait_for_cell, but the code
7049 has been this way since July 1994.
7050 Try changing this after version 19.31.) */
7051 if (! NILP (wait_for_cell
)
7052 && detect_input_pending ())
7054 swallow_events (do_display
);
7055 if (detect_input_pending ())
7059 /* Exit now if the cell we're waiting for became non-nil. */
7060 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7069 #endif /* not subprocesses */
7071 /* The following functions are needed even if async subprocesses are
7072 not supported. Some of them are no-op stubs in that case. */
7074 /* Add DESC to the set of keyboard input descriptors. */
7077 add_keyboard_wait_descriptor (int desc
)
7079 #ifdef subprocesses /* actually means "not MSDOS" */
7080 FD_SET (desc
, &input_wait_mask
);
7081 FD_SET (desc
, &non_process_wait_mask
);
7082 if (desc
> max_input_desc
)
7083 max_input_desc
= desc
;
7087 /* From now on, do not expect DESC to give keyboard input. */
7090 delete_keyboard_wait_descriptor (int desc
)
7094 int lim
= max_input_desc
;
7096 FD_CLR (desc
, &input_wait_mask
);
7097 FD_CLR (desc
, &non_process_wait_mask
);
7099 if (desc
== max_input_desc
)
7100 for (fd
= 0; fd
< lim
; fd
++)
7101 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7102 max_input_desc
= fd
;
7106 /* Setup coding systems of PROCESS. */
7109 setup_process_coding_systems (Lisp_Object process
)
7112 struct Lisp_Process
*p
= XPROCESS (process
);
7114 int outch
= p
->outfd
;
7115 Lisp_Object coding_system
;
7117 if (inch
< 0 || outch
< 0)
7120 if (!proc_decode_coding_system
[inch
])
7121 proc_decode_coding_system
[inch
]
7122 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7123 coding_system
= p
->decode_coding_system
;
7124 if (! NILP (p
->filter
))
7126 else if (BUFFERP (p
->buffer
))
7128 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7129 coding_system
= raw_text_coding_system (coding_system
);
7131 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7133 if (!proc_encode_coding_system
[outch
])
7134 proc_encode_coding_system
[outch
]
7135 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7136 setup_coding_system (p
->encode_coding_system
,
7137 proc_encode_coding_system
[outch
]);
7141 /* Close all descriptors currently in use for communication
7142 with subprocess. This is used in a newly-forked subprocess
7143 to get rid of irrelevant descriptors. */
7146 close_process_descs (void)
7150 for (i
= 0; i
< MAXDESC
; i
++)
7152 Lisp_Object process
;
7153 process
= chan_process
[i
];
7154 if (!NILP (process
))
7156 int in
= XPROCESS (process
)->infd
;
7157 int out
= XPROCESS (process
)->outfd
;
7160 if (out
>= 0 && in
!= out
)
7167 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7168 doc
: /* Return the (or a) process associated with BUFFER.
7169 BUFFER may be a buffer or the name of one. */)
7170 (register Lisp_Object buffer
)
7173 register Lisp_Object buf
, tail
, proc
;
7175 if (NILP (buffer
)) return Qnil
;
7176 buf
= Fget_buffer (buffer
);
7177 if (NILP (buf
)) return Qnil
;
7179 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7181 proc
= Fcdr (XCAR (tail
));
7182 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7185 #endif /* subprocesses */
7189 DEFUN ("process-inherit-coding-system-flag",
7190 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7192 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7193 If this flag is t, `buffer-file-coding-system' of the buffer
7194 associated with PROCESS will inherit the coding system used to decode
7195 the process output. */)
7196 (register Lisp_Object process
)
7199 CHECK_PROCESS (process
);
7200 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7202 /* Ignore the argument and return the value of
7203 inherit-process-coding-system. */
7204 return inherit_process_coding_system
? Qt
: Qnil
;
7208 /* Kill all processes associated with `buffer'.
7209 If `buffer' is nil, kill all processes */
7212 kill_buffer_processes (Lisp_Object buffer
)
7215 Lisp_Object tail
, proc
;
7217 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7219 proc
= XCDR (XCAR (tail
));
7221 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7223 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7224 Fdelete_process (proc
);
7225 else if (XPROCESS (proc
)->infd
>= 0)
7226 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7229 #else /* subprocesses */
7230 /* Since we have no subprocesses, this does nothing. */
7231 #endif /* subprocesses */
7234 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
7236 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7237 This is intended for use by asynchronous process output filters and sentinels. */)
7241 return (waiting_for_user_input_p
? Qt
: Qnil
);
7247 /* Stop reading input from keyboard sources. */
7250 hold_keyboard_input (void)
7255 /* Resume reading input from keyboard sources. */
7258 unhold_keyboard_input (void)
7263 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7266 kbd_on_hold_p (void)
7268 return kbd_is_on_hold
;
7272 /* Enumeration of and access to system processes a-la ps(1). */
7274 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7276 doc
: /* Return a list of numerical process IDs of all running processes.
7277 If this functionality is unsupported, return nil.
7279 See `process-attributes' for getting attributes of a process given its ID. */)
7282 return list_system_processes ();
7285 DEFUN ("process-attributes", Fprocess_attributes
,
7286 Sprocess_attributes
, 1, 1, 0,
7287 doc
: /* Return attributes of the process given by its PID, a number.
7289 Value is an alist where each element is a cons cell of the form
7293 If this functionality is unsupported, the value is nil.
7295 See `list-system-processes' for getting a list of all process IDs.
7297 The KEYs of the attributes that this function may return are listed
7298 below, together with the type of the associated VALUE (in parentheses).
7299 Not all platforms support all of these attributes; unsupported
7300 attributes will not appear in the returned alist.
7301 Unless explicitly indicated otherwise, numbers can have either
7302 integer or floating point values.
7304 euid -- Effective user User ID of the process (number)
7305 user -- User name corresponding to euid (string)
7306 egid -- Effective user Group ID of the process (number)
7307 group -- Group name corresponding to egid (string)
7308 comm -- Command name (executable name only) (string)
7309 state -- Process state code, such as "S", "R", or "T" (string)
7310 ppid -- Parent process ID (number)
7311 pgrp -- Process group ID (number)
7312 sess -- Session ID, i.e. process ID of session leader (number)
7313 ttname -- Controlling tty name (string)
7314 tpgid -- ID of foreground process group on the process's tty (number)
7315 minflt -- number of minor page faults (number)
7316 majflt -- number of major page faults (number)
7317 cminflt -- cumulative number of minor page faults (number)
7318 cmajflt -- cumulative number of major page faults (number)
7319 utime -- user time used by the process, in the (HIGH LOW USEC) format
7320 stime -- system time used by the process, in the (HIGH LOW USEC) format
7321 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7322 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7323 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7324 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7325 pri -- priority of the process (number)
7326 nice -- nice value of the process (number)
7327 thcount -- process thread count (number)
7328 start -- time the process started, in the (HIGH LOW USEC) format
7329 vsize -- virtual memory size of the process in KB's (number)
7330 rss -- resident set size of the process in KB's (number)
7331 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7332 pcpu -- percents of CPU time used by the process (floating-point number)
7333 pmem -- percents of total physical memory used by process's resident set
7334 (floating-point number)
7335 args -- command line which invoked the process (string). */)
7338 return system_process_attributes (pid
);
7348 inhibit_sentinels
= 0;
7352 if (! noninteractive
|| initialized
)
7354 signal (SIGCHLD
, sigchld_handler
);
7357 FD_ZERO (&input_wait_mask
);
7358 FD_ZERO (&non_keyboard_wait_mask
);
7359 FD_ZERO (&non_process_wait_mask
);
7360 FD_ZERO (&write_mask
);
7361 max_process_desc
= 0;
7362 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7364 #ifdef NON_BLOCKING_CONNECT
7365 FD_ZERO (&connect_wait_mask
);
7366 num_pending_connects
= 0;
7369 #ifdef ADAPTIVE_READ_BUFFERING
7370 process_output_delay_count
= 0;
7371 process_output_skip
= 0;
7374 /* Don't do this, it caused infinite select loops. The display
7375 method should call add_keyboard_wait_descriptor on stdin if it
7378 FD_SET (0, &input_wait_mask
);
7381 Vprocess_alist
= Qnil
;
7383 deleted_pid_list
= Qnil
;
7385 for (i
= 0; i
< MAXDESC
; i
++)
7387 chan_process
[i
] = Qnil
;
7388 proc_buffered_char
[i
] = -1;
7390 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7391 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7392 #ifdef DATAGRAM_SOCKETS
7393 memset (datagram_address
, 0, sizeof datagram_address
);
7397 Lisp_Object subfeatures
= Qnil
;
7398 const struct socket_options
*sopt
;
7400 #define ADD_SUBFEATURE(key, val) \
7401 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7403 #ifdef NON_BLOCKING_CONNECT
7404 ADD_SUBFEATURE (QCnowait
, Qt
);
7406 #ifdef DATAGRAM_SOCKETS
7407 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7409 #ifdef HAVE_SEQPACKET
7410 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7412 #ifdef HAVE_LOCAL_SOCKETS
7413 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7415 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7417 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7419 #ifdef HAVE_GETSOCKNAME
7420 ADD_SUBFEATURE (QCservice
, Qt
);
7422 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7423 ADD_SUBFEATURE (QCserver
, Qt
);
7426 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7427 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7429 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7432 #if defined (DARWIN_OS)
7433 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7434 processes. As such, we only change the default value. */
7437 const char *release
= get_operating_system_release ();
7438 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7439 && release
[1] == '.')) {
7440 Vprocess_connection_type
= Qnil
;
7444 #endif /* subprocesses */
7449 syms_of_process (void)
7453 Qprocessp
= intern_c_string ("processp");
7454 staticpro (&Qprocessp
);
7455 Qrun
= intern_c_string ("run");
7457 Qstop
= intern_c_string ("stop");
7459 Qsignal
= intern_c_string ("signal");
7460 staticpro (&Qsignal
);
7462 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7465 Qexit = intern_c_string ("exit");
7466 staticpro (&Qexit); */
7468 Qopen
= intern_c_string ("open");
7470 Qclosed
= intern_c_string ("closed");
7471 staticpro (&Qclosed
);
7472 Qconnect
= intern_c_string ("connect");
7473 staticpro (&Qconnect
);
7474 Qfailed
= intern_c_string ("failed");
7475 staticpro (&Qfailed
);
7476 Qlisten
= intern_c_string ("listen");
7477 staticpro (&Qlisten
);
7478 Qlocal
= intern_c_string ("local");
7479 staticpro (&Qlocal
);
7480 Qipv4
= intern_c_string ("ipv4");
7483 Qipv6
= intern_c_string ("ipv6");
7486 Qdatagram
= intern_c_string ("datagram");
7487 staticpro (&Qdatagram
);
7488 Qseqpacket
= intern_c_string ("seqpacket");
7489 staticpro (&Qseqpacket
);
7491 QCport
= intern_c_string (":port");
7492 staticpro (&QCport
);
7493 QCspeed
= intern_c_string (":speed");
7494 staticpro (&QCspeed
);
7495 QCprocess
= intern_c_string (":process");
7496 staticpro (&QCprocess
);
7498 QCbytesize
= intern_c_string (":bytesize");
7499 staticpro (&QCbytesize
);
7500 QCstopbits
= intern_c_string (":stopbits");
7501 staticpro (&QCstopbits
);
7502 QCparity
= intern_c_string (":parity");
7503 staticpro (&QCparity
);
7504 Qodd
= intern_c_string ("odd");
7506 Qeven
= intern_c_string ("even");
7508 QCflowcontrol
= intern_c_string (":flowcontrol");
7509 staticpro (&QCflowcontrol
);
7510 Qhw
= intern_c_string ("hw");
7512 Qsw
= intern_c_string ("sw");
7514 QCsummary
= intern_c_string (":summary");
7515 staticpro (&QCsummary
);
7517 Qreal
= intern_c_string ("real");
7519 Qnetwork
= intern_c_string ("network");
7520 staticpro (&Qnetwork
);
7521 Qserial
= intern_c_string ("serial");
7522 staticpro (&Qserial
);
7523 QCbuffer
= intern_c_string (":buffer");
7524 staticpro (&QCbuffer
);
7525 QChost
= intern_c_string (":host");
7526 staticpro (&QChost
);
7527 QCservice
= intern_c_string (":service");
7528 staticpro (&QCservice
);
7529 QClocal
= intern_c_string (":local");
7530 staticpro (&QClocal
);
7531 QCremote
= intern_c_string (":remote");
7532 staticpro (&QCremote
);
7533 QCcoding
= intern_c_string (":coding");
7534 staticpro (&QCcoding
);
7535 QCserver
= intern_c_string (":server");
7536 staticpro (&QCserver
);
7537 QCnowait
= intern_c_string (":nowait");
7538 staticpro (&QCnowait
);
7539 QCsentinel
= intern_c_string (":sentinel");
7540 staticpro (&QCsentinel
);
7541 QClog
= intern_c_string (":log");
7543 QCnoquery
= intern_c_string (":noquery");
7544 staticpro (&QCnoquery
);
7545 QCstop
= intern_c_string (":stop");
7546 staticpro (&QCstop
);
7547 QCoptions
= intern_c_string (":options");
7548 staticpro (&QCoptions
);
7549 QCplist
= intern_c_string (":plist");
7550 staticpro (&QCplist
);
7552 Qlast_nonmenu_event
= intern_c_string ("last-nonmenu-event");
7553 staticpro (&Qlast_nonmenu_event
);
7555 staticpro (&Vprocess_alist
);
7557 staticpro (&deleted_pid_list
);
7560 #endif /* subprocesses */
7562 QCname
= intern_c_string (":name");
7563 staticpro (&QCname
);
7564 QCtype
= intern_c_string (":type");
7565 staticpro (&QCtype
);
7567 Qeuid
= intern_c_string ("euid");
7569 Qegid
= intern_c_string ("egid");
7571 Quser
= intern_c_string ("user");
7573 Qgroup
= intern_c_string ("group");
7574 staticpro (&Qgroup
);
7575 Qcomm
= intern_c_string ("comm");
7577 Qstate
= intern_c_string ("state");
7578 staticpro (&Qstate
);
7579 Qppid
= intern_c_string ("ppid");
7581 Qpgrp
= intern_c_string ("pgrp");
7583 Qsess
= intern_c_string ("sess");
7585 Qttname
= intern_c_string ("ttname");
7586 staticpro (&Qttname
);
7587 Qtpgid
= intern_c_string ("tpgid");
7588 staticpro (&Qtpgid
);
7589 Qminflt
= intern_c_string ("minflt");
7590 staticpro (&Qminflt
);
7591 Qmajflt
= intern_c_string ("majflt");
7592 staticpro (&Qmajflt
);
7593 Qcminflt
= intern_c_string ("cminflt");
7594 staticpro (&Qcminflt
);
7595 Qcmajflt
= intern_c_string ("cmajflt");
7596 staticpro (&Qcmajflt
);
7597 Qutime
= intern_c_string ("utime");
7598 staticpro (&Qutime
);
7599 Qstime
= intern_c_string ("stime");
7600 staticpro (&Qstime
);
7601 Qtime
= intern_c_string ("time");
7603 Qcutime
= intern_c_string ("cutime");
7604 staticpro (&Qcutime
);
7605 Qcstime
= intern_c_string ("cstime");
7606 staticpro (&Qcstime
);
7607 Qctime
= intern_c_string ("ctime");
7608 staticpro (&Qctime
);
7609 Qpri
= intern_c_string ("pri");
7611 Qnice
= intern_c_string ("nice");
7613 Qthcount
= intern_c_string ("thcount");
7614 staticpro (&Qthcount
);
7615 Qstart
= intern_c_string ("start");
7616 staticpro (&Qstart
);
7617 Qvsize
= intern_c_string ("vsize");
7618 staticpro (&Qvsize
);
7619 Qrss
= intern_c_string ("rss");
7621 Qetime
= intern_c_string ("etime");
7622 staticpro (&Qetime
);
7623 Qpcpu
= intern_c_string ("pcpu");
7625 Qpmem
= intern_c_string ("pmem");
7627 Qargs
= intern_c_string ("args");
7630 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7631 doc
: /* *Non-nil means delete processes immediately when they exit.
7632 A value of nil means don't delete them until `list-processes' is run. */);
7634 delete_exited_processes
= 1;
7637 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7638 doc
: /* Control type of device used to communicate with subprocesses.
7639 Values are nil to use a pipe, or t or `pty' to use a pty.
7640 The value has no effect if the system has no ptys or if all ptys are busy:
7641 then a pipe is used in any case.
7642 The value takes effect when `start-process' is called. */);
7643 Vprocess_connection_type
= Qt
;
7645 #ifdef ADAPTIVE_READ_BUFFERING
7646 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7647 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7648 On some systems, when Emacs reads the output from a subprocess, the output data
7649 is read in very small blocks, potentially resulting in very poor performance.
7650 This behavior can be remedied to some extent by setting this variable to a
7651 non-nil value, as it will automatically delay reading from such processes, to
7652 allow them to produce more output before Emacs tries to read it.
7653 If the value is t, the delay is reset after each write to the process; any other
7654 non-nil value means that the delay is not reset on write.
7655 The variable takes effect when `start-process' is called. */);
7656 Vprocess_adaptive_read_buffering
= Qt
;
7659 defsubr (&Sprocessp
);
7660 defsubr (&Sget_process
);
7661 defsubr (&Sdelete_process
);
7662 defsubr (&Sprocess_status
);
7663 defsubr (&Sprocess_exit_status
);
7664 defsubr (&Sprocess_id
);
7665 defsubr (&Sprocess_name
);
7666 defsubr (&Sprocess_tty_name
);
7667 defsubr (&Sprocess_command
);
7668 defsubr (&Sset_process_buffer
);
7669 defsubr (&Sprocess_buffer
);
7670 defsubr (&Sprocess_mark
);
7671 defsubr (&Sset_process_filter
);
7672 defsubr (&Sprocess_filter
);
7673 defsubr (&Sset_process_sentinel
);
7674 defsubr (&Sprocess_sentinel
);
7675 defsubr (&Sset_process_window_size
);
7676 defsubr (&Sset_process_inherit_coding_system_flag
);
7677 defsubr (&Sset_process_query_on_exit_flag
);
7678 defsubr (&Sprocess_query_on_exit_flag
);
7679 defsubr (&Sprocess_contact
);
7680 defsubr (&Sprocess_plist
);
7681 defsubr (&Sset_process_plist
);
7682 defsubr (&Slist_processes
);
7683 defsubr (&Sprocess_list
);
7684 defsubr (&Sstart_process
);
7685 defsubr (&Sserial_process_configure
);
7686 defsubr (&Smake_serial_process
);
7687 defsubr (&Sset_network_process_option
);
7688 defsubr (&Smake_network_process
);
7689 defsubr (&Sformat_network_address
);
7690 #if defined(HAVE_NET_IF_H)
7692 defsubr (&Snetwork_interface_list
);
7694 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7695 defsubr (&Snetwork_interface_info
);
7697 #endif /* defined(HAVE_NET_IF_H) */
7698 #ifdef DATAGRAM_SOCKETS
7699 defsubr (&Sprocess_datagram_address
);
7700 defsubr (&Sset_process_datagram_address
);
7702 defsubr (&Saccept_process_output
);
7703 defsubr (&Sprocess_send_region
);
7704 defsubr (&Sprocess_send_string
);
7705 defsubr (&Sinterrupt_process
);
7706 defsubr (&Skill_process
);
7707 defsubr (&Squit_process
);
7708 defsubr (&Sstop_process
);
7709 defsubr (&Scontinue_process
);
7710 defsubr (&Sprocess_running_child_p
);
7711 defsubr (&Sprocess_send_eof
);
7712 defsubr (&Ssignal_process
);
7713 defsubr (&Swaiting_for_user_input_p
);
7714 defsubr (&Sprocess_type
);
7715 defsubr (&Sset_process_coding_system
);
7716 defsubr (&Sprocess_coding_system
);
7717 defsubr (&Sset_process_filter_multibyte
);
7718 defsubr (&Sprocess_filter_multibyte_p
);
7720 #endif /* subprocesses */
7722 defsubr (&Sget_buffer_process
);
7723 defsubr (&Sprocess_inherit_coding_system_flag
);
7724 defsubr (&Slist_system_processes
);
7725 defsubr (&Sprocess_attributes
);