1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2012
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
37 /* Only MS-DOS does not define `subprocesses'. */
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
45 /* Are local (unix) sockets supported? */
46 #if defined (HAVE_SYS_UN_H)
47 #if !defined (AF_LOCAL) && defined (AF_UNIX)
48 #define AF_LOCAL AF_UNIX
51 #define HAVE_LOCAL_SOCKETS
56 #include <sys/ioctl.h>
57 #if defined (HAVE_NET_IF_H)
59 #endif /* HAVE_NET_IF_H */
61 #if defined (HAVE_IFADDRS_H)
62 /* Must be after net/if.h */
65 /* We only use structs from this header when we use getifaddrs. */
66 #if defined (HAVE_NET_IF_DL_H)
67 #include <net/if_dl.h>
77 #include <netinet/in.h>
78 #include <arpa/nameser.h>
90 #endif /* subprocesses */
96 #include "character.h"
101 #include "termhooks.h"
102 #include "termopts.h"
103 #include "commands.h"
104 #include "keyboard.h"
105 #include "blockinput.h"
106 #include "dispextern.h"
107 #include "composite.h"
109 #include "sysselect.h"
110 #include "syssignal.h"
116 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
117 #include "xgselect.h"
123 /* Work around GCC 4.7.0 bug with strict overflow checking; see
124 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
125 These lines can be removed once the GCC bug is fixed. */
126 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
127 # pragma GCC diagnostic ignored "-Wstrict-overflow"
130 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
131 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
132 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
133 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
134 Lisp_Object QCname
, QCtype
;
136 /* Non-zero if keyboard input is on hold, zero otherwise. */
138 static int kbd_is_on_hold
;
140 /* Nonzero means don't run process sentinels. This is used
142 int inhibit_sentinels
;
146 Lisp_Object Qprocessp
;
147 static Lisp_Object Qrun
, Qstop
, Qsignal
;
148 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
150 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
151 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
153 static Lisp_Object Qipv6
;
155 static Lisp_Object QCport
, QCprocess
;
157 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
158 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
159 static Lisp_Object QCbuffer
, QChost
, QCservice
;
160 static Lisp_Object QClocal
, QCremote
, QCcoding
;
161 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
162 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
163 static Lisp_Object Qlast_nonmenu_event
;
164 /* QCfamily is declared and initialized in xfaces.c,
165 QCfilter in keyboard.c. */
166 extern Lisp_Object QCfamily
, QCfilter
;
168 /* Qexit is declared and initialized in eval.c. */
170 /* QCfamily is defined in xfaces.c. */
171 extern Lisp_Object QCfamily
;
172 /* QCfilter is defined in keyboard.c. */
173 extern Lisp_Object QCfilter
;
175 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
176 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
177 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
178 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
184 /* Number of events of change of status of a process. */
185 static EMACS_INT process_tick
;
186 /* Number of events for which the user or sentinel has been notified. */
187 static EMACS_INT update_tick
;
189 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
191 /* Only W32 has this, it really means that select can't take write mask. */
192 #ifdef BROKEN_NON_BLOCKING_CONNECT
193 #undef NON_BLOCKING_CONNECT
194 #define SELECT_CANT_DO_WRITE_MASK
196 #ifndef NON_BLOCKING_CONNECT
198 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
199 #if defined (O_NONBLOCK) || defined (O_NDELAY)
200 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
201 #define NON_BLOCKING_CONNECT
202 #endif /* EWOULDBLOCK || EINPROGRESS */
203 #endif /* O_NONBLOCK || O_NDELAY */
204 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
205 #endif /* HAVE_SELECT */
206 #endif /* NON_BLOCKING_CONNECT */
207 #endif /* BROKEN_NON_BLOCKING_CONNECT */
209 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
210 this system. We need to read full packets, so we need a
211 "non-destructive" select. So we require either native select,
212 or emulation of select using FIONREAD. */
214 #ifdef BROKEN_DATAGRAM_SOCKETS
215 #undef DATAGRAM_SOCKETS
217 #ifndef DATAGRAM_SOCKETS
218 #if defined (HAVE_SELECT) || defined (FIONREAD)
219 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
220 #define DATAGRAM_SOCKETS
221 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
222 #endif /* HAVE_SELECT || FIONREAD */
223 #endif /* DATAGRAM_SOCKETS */
224 #endif /* BROKEN_DATAGRAM_SOCKETS */
226 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
227 # define HAVE_SEQPACKET
230 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
231 #ifdef EMACS_HAS_USECS
232 #define ADAPTIVE_READ_BUFFERING
236 #ifdef ADAPTIVE_READ_BUFFERING
237 #define READ_OUTPUT_DELAY_INCREMENT 10000
238 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
239 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
241 /* Number of processes which have a non-zero read_output_delay,
242 and therefore might be delayed for adaptive read buffering. */
244 static int process_output_delay_count
;
246 /* Non-zero if any process has non-nil read_output_skip. */
248 static int process_output_skip
;
251 #define process_output_delay_count 0
254 static Lisp_Object
Fget_process (Lisp_Object
);
255 static void create_process (Lisp_Object
, char **, Lisp_Object
);
257 static int keyboard_bit_set (SELECT_TYPE
*);
259 static void deactivate_process (Lisp_Object
);
260 static void status_notify (struct Lisp_Process
*);
261 static int read_process_output (Lisp_Object
, int);
262 static void create_pty (Lisp_Object
);
264 /* If we support a window system, turn on the code to poll periodically
265 to detect C-g. It isn't actually used when doing interrupt input. */
266 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
267 #define POLL_FOR_INPUT
270 static Lisp_Object
get_process (register Lisp_Object name
);
271 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
273 /* Mask of bits indicating the descriptors that we wait for input on. */
275 static SELECT_TYPE input_wait_mask
;
277 /* Mask that excludes keyboard input descriptor(s). */
279 static SELECT_TYPE non_keyboard_wait_mask
;
281 /* Mask that excludes process input descriptor(s). */
283 static SELECT_TYPE non_process_wait_mask
;
285 /* Mask for selecting for write. */
287 static SELECT_TYPE write_mask
;
289 #ifdef NON_BLOCKING_CONNECT
290 /* Mask of bits indicating the descriptors that we wait for connect to
291 complete on. Once they complete, they are removed from this mask
292 and added to the input_wait_mask and non_keyboard_wait_mask. */
294 static SELECT_TYPE connect_wait_mask
;
296 /* Number of bits set in connect_wait_mask. */
297 static int num_pending_connects
;
298 #endif /* NON_BLOCKING_CONNECT */
300 /* The largest descriptor currently in use for a process object. */
301 static int max_process_desc
;
303 /* The largest descriptor currently in use for input. */
304 static int max_input_desc
;
306 /* Indexed by descriptor, gives the process (if any) for that descriptor */
307 static Lisp_Object chan_process
[MAXDESC
];
309 /* Alist of elements (NAME . PROCESS) */
310 static Lisp_Object Vprocess_alist
;
312 /* Buffered-ahead input char from process, indexed by channel.
313 -1 means empty (no char is buffered).
314 Used on sys V where the only way to tell if there is any
315 output from the process is to read at least one char.
316 Always -1 on systems that support FIONREAD. */
318 static int proc_buffered_char
[MAXDESC
];
320 /* Table of `struct coding-system' for each process. */
321 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
322 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
324 #ifdef DATAGRAM_SOCKETS
325 /* Table of `partner address' for datagram sockets. */
326 static struct sockaddr_and_len
{
329 } datagram_address
[MAXDESC
];
330 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
331 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
333 #define DATAGRAM_CHAN_P(chan) (0)
334 #define DATAGRAM_CONN_P(proc) (0)
337 /* Maximum number of bytes to send to a pty without an eof. */
338 static int pty_max_bytes
;
342 static struct fd_callback_data
348 int condition
; /* mask of the defines above. */
349 } fd_callback_info
[MAXDESC
];
352 /* Add a file descriptor FD to be monitored for when read is possible.
353 When read is possible, call FUNC with argument DATA. */
356 add_read_fd (int fd
, fd_callback func
, void *data
)
358 xassert (fd
< MAXDESC
);
359 add_keyboard_wait_descriptor (fd
);
361 fd_callback_info
[fd
].func
= func
;
362 fd_callback_info
[fd
].data
= data
;
363 fd_callback_info
[fd
].condition
|= FOR_READ
;
366 /* Stop monitoring file descriptor FD for when read is possible. */
369 delete_read_fd (int fd
)
371 xassert (fd
< MAXDESC
);
372 delete_keyboard_wait_descriptor (fd
);
374 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
375 if (fd_callback_info
[fd
].condition
== 0)
377 fd_callback_info
[fd
].func
= 0;
378 fd_callback_info
[fd
].data
= 0;
382 /* Add a file descriptor FD to be monitored for when write is possible.
383 When write is possible, call FUNC with argument DATA. */
386 add_write_fd (int fd
, fd_callback func
, void *data
)
388 xassert (fd
< MAXDESC
);
389 FD_SET (fd
, &write_mask
);
390 if (fd
> max_input_desc
)
393 fd_callback_info
[fd
].func
= func
;
394 fd_callback_info
[fd
].data
= data
;
395 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
398 /* Stop monitoring file descriptor FD for when write is possible. */
401 delete_write_fd (int fd
)
403 int lim
= max_input_desc
;
405 xassert (fd
< MAXDESC
);
406 FD_CLR (fd
, &write_mask
);
407 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
408 if (fd_callback_info
[fd
].condition
== 0)
410 fd_callback_info
[fd
].func
= 0;
411 fd_callback_info
[fd
].data
= 0;
413 if (fd
== max_input_desc
)
414 for (fd
= lim
; fd
>= 0; fd
--)
415 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
425 /* Compute the Lisp form of the process status, p->status, from
426 the numeric status that was returned by `wait'. */
428 static Lisp_Object
status_convert (int);
431 update_status (struct Lisp_Process
*p
)
433 eassert (p
->raw_status_new
);
434 p
->status
= status_convert (p
->raw_status
);
435 p
->raw_status_new
= 0;
438 /* Convert a process status word in Unix format to
439 the list that we use internally. */
442 status_convert (int w
)
445 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
446 else if (WIFEXITED (w
))
447 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
448 WCOREDUMP (w
) ? Qt
: Qnil
));
449 else if (WIFSIGNALED (w
))
450 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
451 WCOREDUMP (w
) ? Qt
: Qnil
));
456 /* Given a status-list, extract the three pieces of information
457 and store them individually through the three pointers. */
460 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
474 *code
= XFASTINT (XCAR (tem
));
476 *coredump
= !NILP (tem
);
480 /* Return a string describing a process status list. */
483 status_message (struct Lisp_Process
*p
)
485 Lisp_Object status
= p
->status
;
488 Lisp_Object string
, string2
;
490 decode_status (status
, &symbol
, &code
, &coredump
);
492 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
495 synchronize_system_messages_locale ();
496 signame
= strsignal (code
);
498 string
= build_string ("unknown");
503 string
= make_unibyte_string (signame
, strlen (signame
));
504 if (! NILP (Vlocale_coding_system
))
505 string
= (code_convert_string_norecord
506 (string
, Vlocale_coding_system
, 0));
507 c1
= STRING_CHAR (SDATA (string
));
510 Faset (string
, make_number (0), make_number (c2
));
512 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
513 return concat2 (string
, string2
);
515 else if (EQ (symbol
, Qexit
))
518 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
520 return build_string ("finished\n");
521 string
= Fnumber_to_string (make_number (code
));
522 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
523 return concat3 (build_string ("exited abnormally with code "),
526 else if (EQ (symbol
, Qfailed
))
528 string
= Fnumber_to_string (make_number (code
));
529 string2
= build_string ("\n");
530 return concat3 (build_string ("failed with code "),
534 return Fcopy_sequence (Fsymbol_name (symbol
));
539 /* The file name of the pty opened by allocate_pty. */
540 static char pty_name
[24];
542 /* Open an available pty, returning a file descriptor.
543 Return -1 on failure.
544 The file name of the terminal corresponding to the pty
545 is left in the variable pty_name. */
556 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
557 for (i
= 0; i
< 16; i
++)
560 #ifdef PTY_NAME_SPRINTF
563 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
564 #endif /* no PTY_NAME_SPRINTF */
568 #else /* no PTY_OPEN */
570 { /* Some systems name their pseudoterminals so that there are gaps in
571 the usual sequence - for example, on HP9000/S700 systems, there
572 are no pseudoterminals with names ending in 'f'. So we wait for
573 three failures in a row before deciding that we've reached the
575 int failed_count
= 0;
578 if (stat (pty_name
, &stb
) < 0)
581 if (failed_count
>= 3)
588 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
590 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
593 #endif /* no PTY_OPEN */
597 /* check to make certain that both sides are available
598 this avoids a nasty yet stupid bug in rlogins */
599 #ifdef PTY_TTY_NAME_SPRINTF
602 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
603 #endif /* no PTY_TTY_NAME_SPRINTF */
604 if (access (pty_name
, 6) != 0)
619 #endif /* HAVE_PTYS */
622 make_process (Lisp_Object name
)
624 register Lisp_Object val
, tem
, name1
;
625 register struct Lisp_Process
*p
;
626 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
629 p
= allocate_process ();
637 p
->raw_status_new
= 0;
639 p
->mark
= Fmake_marker ();
640 p
->kill_without_query
= 0;
641 p
->write_queue
= Qnil
;
643 #ifdef ADAPTIVE_READ_BUFFERING
644 p
->adaptive_read_buffering
= 0;
645 p
->read_output_delay
= 0;
646 p
->read_output_skip
= 0;
650 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
651 /* Default log level. */
652 p
->gnutls_log_level
= 0;
653 /* GnuTLS handshakes attempted for this connection. */
654 p
->gnutls_handshakes_tried
= 0;
656 p
->gnutls_state
= NULL
;
657 p
->gnutls_x509_cred
= NULL
;
658 p
->gnutls_anon_cred
= NULL
;
661 /* If name is already in use, modify it until it is unused. */
666 tem
= Fget_process (name1
);
667 if (NILP (tem
)) break;
668 sprintf (suffix
, "<%"pMd
">", i
);
669 name1
= concat2 (name
, build_string (suffix
));
673 XSETPROCESS (val
, p
);
674 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
679 remove_process (register Lisp_Object proc
)
681 register Lisp_Object pair
;
683 pair
= Frassq (proc
, Vprocess_alist
);
684 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
686 deactivate_process (proc
);
690 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
691 doc
: /* Return t if OBJECT is a process. */)
694 return PROCESSP (object
) ? Qt
: Qnil
;
697 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
698 doc
: /* Return the process named NAME, or nil if there is none. */)
699 (register Lisp_Object name
)
704 return Fcdr (Fassoc (name
, Vprocess_alist
));
707 /* This is how commands for the user decode process arguments. It
708 accepts a process, a process name, a buffer, a buffer name, or nil.
709 Buffers denote the first process in the buffer, and nil denotes the
713 get_process (register Lisp_Object name
)
715 register Lisp_Object proc
, obj
;
718 obj
= Fget_process (name
);
720 obj
= Fget_buffer (name
);
722 error ("Process %s does not exist", SDATA (name
));
724 else if (NILP (name
))
725 obj
= Fcurrent_buffer ();
729 /* Now obj should be either a buffer object or a process object.
733 proc
= Fget_buffer_process (obj
);
735 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
747 /* Fdelete_process promises to immediately forget about the process, but in
748 reality, Emacs needs to remember those processes until they have been
749 treated by sigchld_handler; otherwise this handler would consider the
750 process as being synchronous and say that the synchronous process is
752 static Lisp_Object deleted_pid_list
;
755 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
756 doc
: /* Delete PROCESS: kill it and forget about it immediately.
757 PROCESS may be a process, a buffer, the name of a process or buffer, or
758 nil, indicating the current buffer's process. */)
759 (register Lisp_Object process
)
761 register struct Lisp_Process
*p
;
763 process
= get_process (process
);
764 p
= XPROCESS (process
);
766 p
->raw_status_new
= 0;
767 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
769 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
770 p
->tick
= ++process_tick
;
772 redisplay_preserve_echo_area (13);
774 else if (p
->infd
>= 0)
780 /* No problem storing the pid here, as it is still in Vprocess_alist. */
781 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
782 /* GC treated elements set to nil. */
783 Fdelq (Qnil
, deleted_pid_list
));
784 /* If the process has already signaled, remove it from the list. */
785 if (p
->raw_status_new
)
788 if (CONSP (p
->status
))
789 symbol
= XCAR (p
->status
);
790 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
792 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
796 Fkill_process (process
, Qnil
);
797 /* Do this now, since remove_process will make sigchld_handler do nothing. */
799 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
800 p
->tick
= ++process_tick
;
802 redisplay_preserve_echo_area (13);
805 remove_process (process
);
809 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
810 doc
: /* Return the status of PROCESS.
811 The returned value is one of the following symbols:
812 run -- for a process that is running.
813 stop -- for a process stopped but continuable.
814 exit -- for a process that has exited.
815 signal -- for a process that has got a fatal signal.
816 open -- for a network stream connection that is open.
817 listen -- for a network stream server that is listening.
818 closed -- for a network stream connection that is closed.
819 connect -- when waiting for a non-blocking connection to complete.
820 failed -- when a non-blocking connection has failed.
821 nil -- if arg is a process name and no such process exists.
822 PROCESS may be a process, a buffer, the name of a process, or
823 nil, indicating the current buffer's process. */)
824 (register Lisp_Object process
)
826 register struct Lisp_Process
*p
;
827 register Lisp_Object status
;
829 if (STRINGP (process
))
830 process
= Fget_process (process
);
832 process
= get_process (process
);
837 p
= XPROCESS (process
);
838 if (p
->raw_status_new
)
842 status
= XCAR (status
);
843 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
845 if (EQ (status
, Qexit
))
847 else if (EQ (p
->command
, Qt
))
849 else if (EQ (status
, Qrun
))
855 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
857 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
858 If PROCESS has not yet exited or died, return 0. */)
859 (register Lisp_Object process
)
861 CHECK_PROCESS (process
);
862 if (XPROCESS (process
)->raw_status_new
)
863 update_status (XPROCESS (process
));
864 if (CONSP (XPROCESS (process
)->status
))
865 return XCAR (XCDR (XPROCESS (process
)->status
));
866 return make_number (0);
869 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
870 doc
: /* Return the process id of PROCESS.
871 This is the pid of the external process which PROCESS uses or talks to.
872 For a network connection, this value is nil. */)
873 (register Lisp_Object process
)
877 CHECK_PROCESS (process
);
878 pid
= XPROCESS (process
)->pid
;
879 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
882 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
883 doc
: /* Return the name of PROCESS, as a string.
884 This is the name of the program invoked in PROCESS,
885 possibly modified to make it unique among process names. */)
886 (register Lisp_Object process
)
888 CHECK_PROCESS (process
);
889 return XPROCESS (process
)->name
;
892 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
893 doc
: /* Return the command that was executed to start PROCESS.
894 This is a list of strings, the first string being the program executed
895 and the rest of the strings being the arguments given to it.
896 For a network or serial process, this is nil (process is running) or t
897 \(process is stopped). */)
898 (register Lisp_Object process
)
900 CHECK_PROCESS (process
);
901 return XPROCESS (process
)->command
;
904 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
905 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
906 This is the terminal that the process itself reads and writes on,
907 not the name of the pty that Emacs uses to talk with that terminal. */)
908 (register Lisp_Object process
)
910 CHECK_PROCESS (process
);
911 return XPROCESS (process
)->tty_name
;
914 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
916 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
918 (register Lisp_Object process
, Lisp_Object buffer
)
920 struct Lisp_Process
*p
;
922 CHECK_PROCESS (process
);
924 CHECK_BUFFER (buffer
);
925 p
= XPROCESS (process
);
927 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
928 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
929 setup_process_coding_systems (process
);
933 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
935 doc
: /* Return the buffer PROCESS is associated with.
936 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
937 (register Lisp_Object process
)
939 CHECK_PROCESS (process
);
940 return XPROCESS (process
)->buffer
;
943 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
945 doc
: /* Return the marker for the end of the last output from PROCESS. */)
946 (register Lisp_Object process
)
948 CHECK_PROCESS (process
);
949 return XPROCESS (process
)->mark
;
952 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
954 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
955 A value of t means stop accepting output from the process.
957 When a process has a filter, its buffer is not used for output.
958 Instead, each time it does output, the entire string of output is
959 passed to the filter.
961 The filter gets two arguments: the process and the string of output.
962 The string argument is normally a multibyte string, except:
963 - if the process' input coding system is no-conversion or raw-text,
964 it is a unibyte string (the non-converted input), or else
965 - if `default-enable-multibyte-characters' is nil, it is a unibyte
966 string (the result of converting the decoded input multibyte
967 string to unibyte with `string-make-unibyte'). */)
968 (register Lisp_Object process
, Lisp_Object filter
)
970 struct Lisp_Process
*p
;
972 CHECK_PROCESS (process
);
973 p
= XPROCESS (process
);
975 /* Don't signal an error if the process' input file descriptor
976 is closed. This could make debugging Lisp more difficult,
977 for example when doing something like
979 (setq process (start-process ...))
981 (set-process-filter process ...) */
985 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
987 FD_CLR (p
->infd
, &input_wait_mask
);
988 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
990 else if (EQ (p
->filter
, Qt
)
991 /* Network or serial process not stopped: */
992 && !EQ (p
->command
, Qt
))
994 FD_SET (p
->infd
, &input_wait_mask
);
995 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1000 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1001 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1002 setup_process_coding_systems (process
);
1006 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1008 doc
: /* Returns the filter function of PROCESS; nil if none.
1009 See `set-process-filter' for more info on filter functions. */)
1010 (register Lisp_Object process
)
1012 CHECK_PROCESS (process
);
1013 return XPROCESS (process
)->filter
;
1016 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1018 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1019 The sentinel is called as a function when the process changes state.
1020 It gets two arguments: the process, and a string describing the change. */)
1021 (register Lisp_Object process
, Lisp_Object sentinel
)
1023 struct Lisp_Process
*p
;
1025 CHECK_PROCESS (process
);
1026 p
= XPROCESS (process
);
1028 p
->sentinel
= sentinel
;
1029 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1030 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1034 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1036 doc
: /* Return the sentinel of PROCESS; nil if none.
1037 See `set-process-sentinel' for more info on sentinels. */)
1038 (register Lisp_Object process
)
1040 CHECK_PROCESS (process
);
1041 return XPROCESS (process
)->sentinel
;
1044 DEFUN ("set-process-window-size", Fset_process_window_size
,
1045 Sset_process_window_size
, 3, 3, 0,
1046 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1047 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1049 CHECK_PROCESS (process
);
1050 CHECK_RANGED_INTEGER (0, height
, INT_MAX
);
1051 CHECK_RANGED_INTEGER (0, width
, INT_MAX
);
1053 if (XPROCESS (process
)->infd
< 0
1054 || set_window_size (XPROCESS (process
)->infd
,
1055 XINT (height
), XINT (width
)) <= 0)
1061 DEFUN ("set-process-inherit-coding-system-flag",
1062 Fset_process_inherit_coding_system_flag
,
1063 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1064 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1065 If the second argument FLAG is non-nil, then the variable
1066 `buffer-file-coding-system' of the buffer associated with PROCESS
1067 will be bound to the value of the coding system used to decode
1070 This is useful when the coding system specified for the process buffer
1071 leaves either the character code conversion or the end-of-line conversion
1072 unspecified, or if the coding system used to decode the process output
1073 is more appropriate for saving the process buffer.
1075 Binding the variable `inherit-process-coding-system' to non-nil before
1076 starting the process is an alternative way of setting the inherit flag
1077 for the process which will run.
1079 This function returns FLAG. */)
1080 (register Lisp_Object process
, Lisp_Object flag
)
1082 CHECK_PROCESS (process
);
1083 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1087 DEFUN ("set-process-query-on-exit-flag",
1088 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1090 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1091 If the second argument FLAG is non-nil, Emacs will query the user before
1092 exiting or killing a buffer if PROCESS is running. This function
1094 (register Lisp_Object process
, Lisp_Object flag
)
1096 CHECK_PROCESS (process
);
1097 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1101 DEFUN ("process-query-on-exit-flag",
1102 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1104 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1105 (register Lisp_Object process
)
1107 CHECK_PROCESS (process
);
1108 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1111 #ifdef DATAGRAM_SOCKETS
1112 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1115 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1117 doc
: /* Return the contact info of PROCESS; t for a real child.
1118 For a network or serial connection, the value depends on the optional
1119 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1120 SERVICE) for a network connection or (PORT SPEED) for a serial
1121 connection. If KEY is t, the complete contact information for the
1122 connection is returned, else the specific value for the keyword KEY is
1123 returned. See `make-network-process' or `make-serial-process' for a
1124 list of keywords. */)
1125 (register Lisp_Object process
, Lisp_Object key
)
1127 Lisp_Object contact
;
1129 CHECK_PROCESS (process
);
1130 contact
= XPROCESS (process
)->childp
;
1132 #ifdef DATAGRAM_SOCKETS
1133 if (DATAGRAM_CONN_P (process
)
1134 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1135 contact
= Fplist_put (contact
, QCremote
,
1136 Fprocess_datagram_address (process
));
1139 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1141 if (NILP (key
) && NETCONN_P (process
))
1142 return Fcons (Fplist_get (contact
, QChost
),
1143 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1144 if (NILP (key
) && SERIALCONN_P (process
))
1145 return Fcons (Fplist_get (contact
, QCport
),
1146 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1147 return Fplist_get (contact
, key
);
1150 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1152 doc
: /* Return the plist of PROCESS. */)
1153 (register Lisp_Object process
)
1155 CHECK_PROCESS (process
);
1156 return XPROCESS (process
)->plist
;
1159 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1161 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1162 (register Lisp_Object process
, Lisp_Object plist
)
1164 CHECK_PROCESS (process
);
1167 XPROCESS (process
)->plist
= plist
;
1171 #if 0 /* Turned off because we don't currently record this info
1172 in the process. Perhaps add it. */
1173 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1174 doc
: /* Return the connection type of PROCESS.
1175 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1176 a socket connection. */)
1177 (Lisp_Object process
)
1179 return XPROCESS (process
)->type
;
1183 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1184 doc
: /* Return the connection type of PROCESS.
1185 The value is either the symbol `real', `network', or `serial'.
1186 PROCESS may be a process, a buffer, the name of a process or buffer, or
1187 nil, indicating the current buffer's process. */)
1188 (Lisp_Object process
)
1191 proc
= get_process (process
);
1192 return XPROCESS (proc
)->type
;
1195 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1197 doc
: /* Convert network ADDRESS from internal format to a string.
1198 A 4 or 5 element vector represents an IPv4 address (with port number).
1199 An 8 or 9 element vector represents an IPv6 address (with port number).
1200 If optional second argument OMIT-PORT is non-nil, don't include a port
1201 number in the string, even when present in ADDRESS.
1202 Returns nil if format of ADDRESS is invalid. */)
1203 (Lisp_Object address
, Lisp_Object omit_port
)
1208 if (STRINGP (address
)) /* AF_LOCAL */
1211 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1213 register struct Lisp_Vector
*p
= XVECTOR (address
);
1214 ptrdiff_t size
= p
->header
.size
;
1215 Lisp_Object args
[10];
1218 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1220 args
[0] = build_string ("%d.%d.%d.%d");
1225 args
[0] = build_string ("%d.%d.%d.%d:%d");
1228 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1230 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1235 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1241 for (i
= 0; i
< nargs
; i
++)
1243 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1246 if (nargs
<= 5 /* IPv4 */
1247 && i
< 4 /* host, not port */
1248 && XINT (p
->contents
[i
]) > 255)
1251 args
[i
+1] = p
->contents
[i
];
1254 return Fformat (nargs
+1, args
);
1257 if (CONSP (address
))
1259 Lisp_Object args
[2];
1260 args
[0] = build_string ("<Family %d>");
1261 args
[1] = Fcar (address
);
1262 return Fformat (2, args
);
1268 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1269 doc
: /* Return a list of all processes. */)
1272 return Fmapcar (Qcdr
, Vprocess_alist
);
1275 /* Starting asynchronous inferior processes. */
1277 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1279 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1280 doc
: /* Start a program in a subprocess. Return the process object for it.
1281 NAME is name for process. It is modified if necessary to make it unique.
1282 BUFFER is the buffer (or buffer name) to associate with the process.
1284 Process output (both standard output and standard error streams) goes
1285 at end of BUFFER, unless you specify an output stream or filter
1286 function to handle the output. BUFFER may also be nil, meaning that
1287 this process is not associated with any buffer.
1289 PROGRAM is the program file name. It is searched for in `exec-path'
1290 (which see). If nil, just associate a pty with the buffer. Remaining
1291 arguments are strings to give program as arguments.
1293 If you want to separate standard output from standard error, invoke
1294 the command through a shell and redirect one of them using the shell
1297 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1298 (ptrdiff_t nargs
, Lisp_Object
*args
)
1300 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1301 register unsigned char **new_argv
;
1303 ptrdiff_t count
= SPECPDL_INDEX ();
1307 buffer
= Fget_buffer_create (buffer
);
1309 /* Make sure that the child will be able to chdir to the current
1310 buffer's current directory, or its unhandled equivalent. We
1311 can't just have the child check for an error when it does the
1312 chdir, since it's in a vfork.
1314 We have to GCPRO around this because Fexpand_file_name and
1315 Funhandled_file_name_directory might call a file name handling
1316 function. The argument list is protected by the caller, so all
1317 we really have to worry about is buffer. */
1319 struct gcpro gcpro1
, gcpro2
;
1321 current_dir
= BVAR (current_buffer
, directory
);
1323 GCPRO2 (buffer
, current_dir
);
1325 current_dir
= Funhandled_file_name_directory (current_dir
);
1326 if (NILP (current_dir
))
1327 /* If the file name handler says that current_dir is unreachable, use
1328 a sensible default. */
1329 current_dir
= build_string ("~/");
1330 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1331 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1332 report_file_error ("Setting current directory",
1333 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1339 CHECK_STRING (name
);
1343 if (!NILP (program
))
1344 CHECK_STRING (program
);
1346 proc
= make_process (name
);
1347 /* If an error occurs and we can't start the process, we want to
1348 remove it from the process list. This means that each error
1349 check in create_process doesn't need to call remove_process
1350 itself; it's all taken care of here. */
1351 record_unwind_protect (start_process_unwind
, proc
);
1353 XPROCESS (proc
)->childp
= Qt
;
1354 XPROCESS (proc
)->plist
= Qnil
;
1355 XPROCESS (proc
)->type
= Qreal
;
1356 XPROCESS (proc
)->buffer
= buffer
;
1357 XPROCESS (proc
)->sentinel
= Qnil
;
1358 XPROCESS (proc
)->filter
= Qnil
;
1359 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1362 /* AKA GNUTLS_INITSTAGE(proc). */
1363 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1364 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1367 #ifdef ADAPTIVE_READ_BUFFERING
1368 XPROCESS (proc
)->adaptive_read_buffering
1369 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1370 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1373 /* Make the process marker point into the process buffer (if any). */
1374 if (BUFFERP (buffer
))
1375 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1376 BUF_ZV (XBUFFER (buffer
)),
1377 BUF_ZV_BYTE (XBUFFER (buffer
)));
1380 /* Decide coding systems for communicating with the process. Here
1381 we don't setup the structure coding_system nor pay attention to
1382 unibyte mode. They are done in create_process. */
1384 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1385 Lisp_Object coding_systems
= Qt
;
1386 Lisp_Object val
, *args2
;
1387 struct gcpro gcpro1
, gcpro2
;
1389 val
= Vcoding_system_for_read
;
1392 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1393 args2
[0] = Qstart_process
;
1394 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1395 GCPRO2 (proc
, current_dir
);
1396 if (!NILP (program
))
1397 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1399 if (CONSP (coding_systems
))
1400 val
= XCAR (coding_systems
);
1401 else if (CONSP (Vdefault_process_coding_system
))
1402 val
= XCAR (Vdefault_process_coding_system
);
1404 XPROCESS (proc
)->decode_coding_system
= val
;
1406 val
= Vcoding_system_for_write
;
1409 if (EQ (coding_systems
, Qt
))
1411 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1412 args2
[0] = Qstart_process
;
1413 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1414 GCPRO2 (proc
, current_dir
);
1415 if (!NILP (program
))
1416 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1419 if (CONSP (coding_systems
))
1420 val
= XCDR (coding_systems
);
1421 else if (CONSP (Vdefault_process_coding_system
))
1422 val
= XCDR (Vdefault_process_coding_system
);
1424 XPROCESS (proc
)->encode_coding_system
= val
;
1425 /* Note: At this moment, the above coding system may leave
1426 text-conversion or eol-conversion unspecified. They will be
1427 decided after we read output from the process and decode it by
1428 some coding system, or just before we actually send a text to
1433 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1434 XPROCESS (proc
)->decoding_carryover
= 0;
1435 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1437 XPROCESS (proc
)->inherit_coding_system_flag
1438 = !(NILP (buffer
) || !inherit_process_coding_system
);
1440 if (!NILP (program
))
1442 /* If program file name is not absolute, search our path for it.
1443 Put the name we will really use in TEM. */
1444 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1445 && !(SCHARS (program
) > 1
1446 && IS_DEVICE_SEP (SREF (program
, 1))))
1448 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1451 GCPRO4 (name
, program
, buffer
, current_dir
);
1452 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1455 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1456 tem
= Fexpand_file_name (tem
, Qnil
);
1460 if (!NILP (Ffile_directory_p (program
)))
1461 error ("Specified program for new process is a directory");
1465 /* If program file name starts with /: for quoting a magic name,
1467 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1468 && SREF (tem
, 1) == ':')
1469 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1472 Lisp_Object arg_encoding
= Qnil
;
1473 struct gcpro gcpro1
;
1476 /* Encode the file name and put it in NEW_ARGV.
1477 That's where the child will use it to execute the program. */
1478 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1480 /* Here we encode arguments by the coding system used for sending
1481 data to the process. We don't support using different coding
1482 systems for encoding arguments and for encoding data sent to the
1485 for (i
= 3; i
< nargs
; i
++)
1487 tem
= Fcons (args
[i
], tem
);
1488 CHECK_STRING (XCAR (tem
));
1489 if (STRING_MULTIBYTE (XCAR (tem
)))
1491 if (NILP (arg_encoding
))
1492 arg_encoding
= (complement_process_encoding_system
1493 (XPROCESS (proc
)->encode_coding_system
));
1495 code_convert_string_norecord
1496 (XCAR (tem
), arg_encoding
, 1));
1503 /* Now that everything is encoded we can collect the strings into
1505 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1506 new_argv
[nargs
- 2] = 0;
1508 for (i
= nargs
- 2; i
-- != 0; )
1510 new_argv
[i
] = SDATA (XCAR (tem
));
1514 create_process (proc
, (char **) new_argv
, current_dir
);
1519 return unbind_to (count
, proc
);
1522 /* This function is the unwind_protect form for Fstart_process. If
1523 PROC doesn't have its pid set, then we know someone has signaled
1524 an error and the process wasn't started successfully, so we should
1525 remove it from the process list. */
1527 start_process_unwind (Lisp_Object proc
)
1529 if (!PROCESSP (proc
))
1532 /* Was PROC started successfully?
1533 -2 is used for a pty with no process, eg for gdb. */
1534 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1535 remove_process (proc
);
1541 create_process_1 (struct atimer
*timer
)
1543 /* Nothing to do. */
1548 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1550 int inchannel
, outchannel
;
1553 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1554 int wait_child_setup
[2];
1558 struct sigaction sigint_action
;
1559 struct sigaction sigquit_action
;
1560 struct sigaction sigpipe_action
;
1562 struct sigaction sighup_action
;
1564 /* Use volatile to protect variables from being clobbered by longjmp. */
1565 volatile int forkin
, forkout
;
1566 volatile int pty_flag
= 0;
1568 extern char **environ
;
1571 inchannel
= outchannel
= -1;
1574 if (!NILP (Vprocess_connection_type
))
1575 outchannel
= inchannel
= allocate_pty ();
1579 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1580 /* On most USG systems it does not work to open the pty's tty here,
1581 then close it and reopen it in the child. */
1583 /* Don't let this terminal become our controlling terminal
1584 (in case we don't have one). */
1585 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1587 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1590 report_file_error ("Opening pty", Qnil
);
1592 forkin
= forkout
= -1;
1593 #endif /* not USG, or USG_SUBTTY_WORKS */
1597 #endif /* HAVE_PTYS */
1602 report_file_error ("Creating pipe", Qnil
);
1608 emacs_close (inchannel
);
1609 emacs_close (forkout
);
1610 report_file_error ("Creating pipe", Qnil
);
1616 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1620 tem
= pipe (wait_child_setup
);
1622 report_file_error ("Creating pipe", Qnil
);
1623 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1625 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1628 emacs_close (wait_child_setup
[0]);
1629 emacs_close (wait_child_setup
[1]);
1630 report_file_error ("Setting file descriptor flags", Qnil
);
1636 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1637 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1640 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1641 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1645 /* Record this as an active process, with its channels.
1646 As a result, child_setup will close Emacs's side of the pipes. */
1647 chan_process
[inchannel
] = process
;
1648 XPROCESS (process
)->infd
= inchannel
;
1649 XPROCESS (process
)->outfd
= outchannel
;
1651 /* Previously we recorded the tty descriptor used in the subprocess.
1652 It was only used for getting the foreground tty process, so now
1653 we just reopen the device (see emacs_get_tty_pgrp) as this is
1654 more portable (see USG_SUBTTY_WORKS above). */
1656 XPROCESS (process
)->pty_flag
= pty_flag
;
1657 XPROCESS (process
)->status
= Qrun
;
1659 /* Delay interrupts until we have a chance to store
1660 the new fork's pid in its process structure */
1661 sigemptyset (&blocked
);
1663 sigaddset (&blocked
, SIGCHLD
);
1665 #ifdef HAVE_WORKING_VFORK
1666 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1667 this sets the parent's signal handlers as well as the child's.
1668 So delay all interrupts whose handlers the child might munge,
1669 and record the current handlers so they can be restored later. */
1670 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1671 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1672 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1674 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1676 #endif /* HAVE_WORKING_VFORK */
1677 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1679 FD_SET (inchannel
, &input_wait_mask
);
1680 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1681 if (inchannel
> max_process_desc
)
1682 max_process_desc
= inchannel
;
1684 /* Until we store the proper pid, enable sigchld_handler
1685 to recognize an unknown pid as standing for this process.
1686 It is very important not to let this `marker' value stay
1687 in the table after this function has returned; if it does
1688 it might cause call-process to hang and subsequent asynchronous
1689 processes to get their return values scrambled. */
1690 XPROCESS (process
)->pid
= -1;
1692 /* This must be called after the above line because it may signal an
1694 setup_process_coding_systems (process
);
1699 /* child_setup must clobber environ on systems with true vfork.
1700 Protect it from permanent change. */
1701 char **save_environ
= environ
;
1702 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1707 #endif /* not WINDOWSNT */
1709 int xforkin
= forkin
;
1710 int xforkout
= forkout
;
1712 #if 0 /* This was probably a mistake--it duplicates code later on,
1713 but fails to handle all the cases. */
1714 /* Make sure SIGCHLD is not blocked in the child. */
1715 sigsetmask (SIGEMPTYMASK
);
1718 /* Make the pty be the controlling terminal of the process. */
1720 /* First, disconnect its current controlling terminal. */
1722 /* We tried doing setsid only if pty_flag, but it caused
1723 process_set_signal to fail on SGI when using a pipe. */
1725 /* Make the pty's terminal the controlling terminal. */
1726 if (pty_flag
&& xforkin
>= 0)
1729 /* We ignore the return value
1730 because faith@cs.unc.edu says that is necessary on Linux. */
1731 ioctl (xforkin
, TIOCSCTTY
, 0);
1734 #else /* not HAVE_SETSID */
1736 /* It's very important to call setpgrp here and no time
1737 afterwards. Otherwise, we lose our controlling tty which
1738 is set when we open the pty. */
1741 #endif /* not HAVE_SETSID */
1742 #if defined (LDISC1)
1743 if (pty_flag
&& xforkin
>= 0)
1746 tcgetattr (xforkin
, &t
);
1748 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1749 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1752 #if defined (NTTYDISC) && defined (TIOCSETD)
1753 if (pty_flag
&& xforkin
>= 0)
1755 /* Use new line discipline. */
1756 int ldisc
= NTTYDISC
;
1757 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1762 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1763 can do TIOCSPGRP only to the process's controlling tty. */
1766 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1767 I can't test it since I don't have 4.3. */
1768 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1771 ioctl (j
, TIOCNOTTY
, 0);
1775 /* In order to get a controlling terminal on some versions
1776 of BSD, it is necessary to put the process in pgrp 0
1777 before it opens the terminal. */
1785 #endif /* TIOCNOTTY */
1787 #if !defined (DONT_REOPEN_PTY)
1788 /*** There is a suggestion that this ought to be a
1789 conditional on TIOCSPGRP,
1790 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1791 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1792 that system does seem to need this code, even though
1793 both HAVE_SETSID and TIOCSCTTY are defined. */
1794 /* Now close the pty (if we had it open) and reopen it.
1795 This makes the pty the controlling terminal of the subprocess. */
1799 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1802 emacs_close (xforkin
);
1803 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1807 emacs_write (1, "Couldn't open the pty terminal ", 31);
1808 emacs_write (1, pty_name
, strlen (pty_name
));
1809 emacs_write (1, "\n", 1);
1814 #endif /* not DONT_REOPEN_PTY */
1816 #ifdef SETUP_SLAVE_PTY
1821 #endif /* SETUP_SLAVE_PTY */
1823 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1824 Now reenable it in the child, so it will die when we want it to. */
1826 signal (SIGHUP
, SIG_DFL
);
1828 #endif /* HAVE_PTYS */
1830 signal (SIGINT
, SIG_DFL
);
1831 signal (SIGQUIT
, SIG_DFL
);
1832 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1834 signal (SIGPIPE
, SIG_DFL
);
1836 /* Stop blocking signals in the child. */
1837 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1840 child_setup_tty (xforkout
);
1842 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1843 new_argv
, 1, encoded_current_dir
);
1844 #else /* not WINDOWSNT */
1846 emacs_close (wait_child_setup
[0]);
1848 child_setup (xforkin
, xforkout
, xforkout
,
1849 new_argv
, 1, encoded_current_dir
);
1850 #endif /* not WINDOWSNT */
1852 environ
= save_environ
;
1857 /* This runs in the Emacs process. */
1861 emacs_close (forkin
);
1862 if (forkin
!= forkout
&& forkout
>= 0)
1863 emacs_close (forkout
);
1867 /* vfork succeeded. */
1868 XPROCESS (process
)->pid
= pid
;
1871 register_child (pid
, inchannel
);
1872 #endif /* WINDOWSNT */
1874 /* If the subfork execv fails, and it exits,
1875 this close hangs. I don't know why.
1876 So have an interrupt jar it loose. */
1878 struct atimer
*timer
;
1882 EMACS_SET_SECS_USECS (offset
, 1, 0);
1883 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1886 emacs_close (forkin
);
1888 cancel_atimer (timer
);
1892 if (forkin
!= forkout
&& forkout
>= 0)
1893 emacs_close (forkout
);
1897 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1900 XPROCESS (process
)->tty_name
= Qnil
;
1902 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1903 /* Wait for child_setup to complete in case that vfork is
1904 actually defined as fork. The descriptor wait_child_setup[1]
1905 of a pipe is closed at the child side either by close-on-exec
1906 on successful execvp or the _exit call in child_setup. */
1910 emacs_close (wait_child_setup
[1]);
1911 emacs_read (wait_child_setup
[0], &dummy
, 1);
1912 emacs_close (wait_child_setup
[0]);
1917 /* Restore the signal state whether vfork succeeded or not.
1918 (We will signal an error, below, if it failed.) */
1919 #ifdef HAVE_WORKING_VFORK
1920 /* Restore the parent's signal handlers. */
1921 sigaction (SIGINT
, &sigint_action
, 0);
1922 sigaction (SIGQUIT
, &sigquit_action
, 0);
1923 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1925 sigaction (SIGHUP
, &sighup_action
, 0);
1927 #endif /* HAVE_WORKING_VFORK */
1928 /* Stop blocking signals in the parent. */
1929 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1931 /* Now generate the error if vfork failed. */
1933 report_file_error ("Doing vfork", Qnil
);
1937 create_pty (Lisp_Object process
)
1939 int inchannel
, outchannel
;
1942 inchannel
= outchannel
= -1;
1945 if (!NILP (Vprocess_connection_type
))
1946 outchannel
= inchannel
= allocate_pty ();
1950 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1951 /* On most USG systems it does not work to open the pty's tty here,
1952 then close it and reopen it in the child. */
1954 /* Don't let this terminal become our controlling terminal
1955 (in case we don't have one). */
1956 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1958 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1961 report_file_error ("Opening pty", Qnil
);
1962 #if defined (DONT_REOPEN_PTY)
1963 /* In the case that vfork is defined as fork, the parent process
1964 (Emacs) may send some data before the child process completes
1965 tty options setup. So we setup tty before forking. */
1966 child_setup_tty (forkout
);
1967 #endif /* DONT_REOPEN_PTY */
1968 #endif /* not USG, or USG_SUBTTY_WORKS */
1971 #endif /* HAVE_PTYS */
1974 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1975 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1978 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1979 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1983 /* Record this as an active process, with its channels.
1984 As a result, child_setup will close Emacs's side of the pipes. */
1985 chan_process
[inchannel
] = process
;
1986 XPROCESS (process
)->infd
= inchannel
;
1987 XPROCESS (process
)->outfd
= outchannel
;
1989 /* Previously we recorded the tty descriptor used in the subprocess.
1990 It was only used for getting the foreground tty process, so now
1991 we just reopen the device (see emacs_get_tty_pgrp) as this is
1992 more portable (see USG_SUBTTY_WORKS above). */
1994 XPROCESS (process
)->pty_flag
= pty_flag
;
1995 XPROCESS (process
)->status
= Qrun
;
1996 setup_process_coding_systems (process
);
1998 FD_SET (inchannel
, &input_wait_mask
);
1999 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2000 if (inchannel
> max_process_desc
)
2001 max_process_desc
= inchannel
;
2003 XPROCESS (process
)->pid
= -2;
2006 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2009 XPROCESS (process
)->tty_name
= Qnil
;
2013 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2014 The address family of sa is not included in the result. */
2017 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2019 Lisp_Object address
;
2022 register struct Lisp_Vector
*p
;
2024 /* Workaround for a bug in getsockname on BSD: Names bound to
2025 sockets in the UNIX domain are inaccessible; getsockname returns
2026 a zero length name. */
2027 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2028 return empty_unibyte_string
;
2030 switch (sa
->sa_family
)
2034 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2035 len
= sizeof (sin
->sin_addr
) + 1;
2036 address
= Fmake_vector (make_number (len
), Qnil
);
2037 p
= XVECTOR (address
);
2038 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2039 cp
= (unsigned char *) &sin
->sin_addr
;
2045 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2046 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2047 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2048 address
= Fmake_vector (make_number (len
), Qnil
);
2049 p
= XVECTOR (address
);
2050 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2051 for (i
= 0; i
< len
; i
++)
2052 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2056 #ifdef HAVE_LOCAL_SOCKETS
2059 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2060 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2061 if (sockun
->sun_path
[i
] == 0)
2063 return make_unibyte_string (sockun
->sun_path
, i
);
2067 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2068 address
= Fcons (make_number (sa
->sa_family
),
2069 Fmake_vector (make_number (len
), Qnil
));
2070 p
= XVECTOR (XCDR (address
));
2071 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2077 p
->contents
[i
++] = make_number (*cp
++);
2083 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2086 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2088 register struct Lisp_Vector
*p
;
2090 if (VECTORP (address
))
2092 p
= XVECTOR (address
);
2093 if (p
->header
.size
== 5)
2096 return sizeof (struct sockaddr_in
);
2099 else if (p
->header
.size
== 9)
2101 *familyp
= AF_INET6
;
2102 return sizeof (struct sockaddr_in6
);
2106 #ifdef HAVE_LOCAL_SOCKETS
2107 else if (STRINGP (address
))
2109 *familyp
= AF_LOCAL
;
2110 return sizeof (struct sockaddr_un
);
2113 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2114 && VECTORP (XCDR (address
)))
2116 struct sockaddr
*sa
;
2117 *familyp
= XINT (XCAR (address
));
2118 p
= XVECTOR (XCDR (address
));
2119 return p
->header
.size
+ sizeof (sa
->sa_family
);
2124 /* Convert an address object (vector or string) to an internal sockaddr.
2126 The address format has been basically validated by
2127 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2128 it could have come from user data. So if FAMILY is not valid,
2129 we return after zeroing *SA. */
2132 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2134 register struct Lisp_Vector
*p
;
2135 register unsigned char *cp
= NULL
;
2139 memset (sa
, 0, len
);
2141 if (VECTORP (address
))
2143 p
= XVECTOR (address
);
2144 if (family
== AF_INET
)
2146 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2147 len
= sizeof (sin
->sin_addr
) + 1;
2148 hostport
= XINT (p
->contents
[--len
]);
2149 sin
->sin_port
= htons (hostport
);
2150 cp
= (unsigned char *)&sin
->sin_addr
;
2151 sa
->sa_family
= family
;
2154 else if (family
== AF_INET6
)
2156 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2157 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2158 len
= sizeof (sin6
->sin6_addr
) + 1;
2159 hostport
= XINT (p
->contents
[--len
]);
2160 sin6
->sin6_port
= htons (hostport
);
2161 for (i
= 0; i
< len
; i
++)
2162 if (INTEGERP (p
->contents
[i
]))
2164 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2167 sa
->sa_family
= family
;
2174 else if (STRINGP (address
))
2176 #ifdef HAVE_LOCAL_SOCKETS
2177 if (family
== AF_LOCAL
)
2179 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2180 cp
= SDATA (address
);
2181 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2182 sockun
->sun_path
[i
] = *cp
++;
2183 sa
->sa_family
= family
;
2190 p
= XVECTOR (XCDR (address
));
2191 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2194 for (i
= 0; i
< len
; i
++)
2195 if (INTEGERP (p
->contents
[i
]))
2196 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2199 #ifdef DATAGRAM_SOCKETS
2200 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2202 doc
: /* Get the current datagram address associated with PROCESS. */)
2203 (Lisp_Object process
)
2207 CHECK_PROCESS (process
);
2209 if (!DATAGRAM_CONN_P (process
))
2212 channel
= XPROCESS (process
)->infd
;
2213 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2214 datagram_address
[channel
].len
);
2217 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2219 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2220 Returns nil upon error setting address, ADDRESS otherwise. */)
2221 (Lisp_Object process
, Lisp_Object address
)
2226 CHECK_PROCESS (process
);
2228 if (!DATAGRAM_CONN_P (process
))
2231 channel
= XPROCESS (process
)->infd
;
2233 len
= get_lisp_to_sockaddr_size (address
, &family
);
2234 if (datagram_address
[channel
].len
!= len
)
2236 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2242 static const struct socket_options
{
2243 /* The name of this option. Should be lowercase version of option
2244 name without SO_ prefix. */
2246 /* Option level SOL_... */
2248 /* Option number SO_... */
2250 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2251 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2252 } socket_options
[] =
2254 #ifdef SO_BINDTODEVICE
2255 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2258 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2261 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2264 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2267 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2270 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2273 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2276 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2278 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2281 /* Set option OPT to value VAL on socket S.
2283 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2284 Signals an error if setting a known option fails.
2288 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2291 const struct socket_options
*sopt
;
2296 name
= SSDATA (SYMBOL_NAME (opt
));
2297 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2298 if (strcmp (name
, sopt
->name
) == 0)
2301 switch (sopt
->opttype
)
2306 optval
= NILP (val
) ? 0 : 1;
2307 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2308 &optval
, sizeof (optval
));
2315 if (TYPE_RANGED_INTEGERP (int, val
))
2316 optval
= XINT (val
);
2318 error ("Bad option value for %s", name
);
2319 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2320 &optval
, sizeof (optval
));
2324 #ifdef SO_BINDTODEVICE
2327 char devname
[IFNAMSIZ
+1];
2329 /* This is broken, at least in the Linux 2.4 kernel.
2330 To unbind, the arg must be a zero integer, not the empty string.
2331 This should work on all systems. KFS. 2003-09-23. */
2332 memset (devname
, 0, sizeof devname
);
2335 char *arg
= SSDATA (val
);
2336 int len
= min (strlen (arg
), IFNAMSIZ
);
2337 memcpy (devname
, arg
, len
);
2339 else if (!NILP (val
))
2340 error ("Bad option value for %s", name
);
2341 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2350 struct linger linger
;
2353 linger
.l_linger
= 0;
2354 if (TYPE_RANGED_INTEGERP (int, val
))
2355 linger
.l_linger
= XINT (val
);
2357 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2358 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2359 &linger
, sizeof (linger
));
2369 report_file_error ("Cannot set network option",
2370 Fcons (opt
, Fcons (val
, Qnil
)));
2371 return (1 << sopt
->optbit
);
2375 DEFUN ("set-network-process-option",
2376 Fset_network_process_option
, Sset_network_process_option
,
2378 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2379 See `make-network-process' for a list of options and values.
2380 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2381 OPTION is not a supported option, return nil instead; otherwise return t. */)
2382 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2385 struct Lisp_Process
*p
;
2387 CHECK_PROCESS (process
);
2388 p
= XPROCESS (process
);
2389 if (!NETCONN1_P (p
))
2390 error ("Process is not a network process");
2394 error ("Process is not running");
2396 if (set_socket_option (s
, option
, value
))
2398 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2402 if (NILP (no_error
))
2403 error ("Unknown or unsupported option");
2409 DEFUN ("serial-process-configure",
2410 Fserial_process_configure
,
2411 Sserial_process_configure
,
2413 doc
: /* Configure speed, bytesize, etc. of a serial process.
2415 Arguments are specified as keyword/argument pairs. Attributes that
2416 are not given are re-initialized from the process's current
2417 configuration (available via the function `process-contact') or set to
2418 reasonable default values. The following arguments are defined:
2424 -- Any of these arguments can be given to identify the process that is
2425 to be configured. If none of these arguments is given, the current
2426 buffer's process is used.
2428 :speed SPEED -- SPEED is the speed of the serial port in bits per
2429 second, also called baud rate. Any value can be given for SPEED, but
2430 most serial ports work only at a few defined values between 1200 and
2431 115200, with 9600 being the most common value. If SPEED is nil, the
2432 serial port is not configured any further, i.e., all other arguments
2433 are ignored. This may be useful for special serial ports such as
2434 Bluetooth-to-serial converters which can only be configured through AT
2435 commands. A value of nil for SPEED can be used only when passed
2436 through `make-serial-process' or `serial-term'.
2438 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2439 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2441 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2442 `odd' (use odd parity), or the symbol `even' (use even parity). If
2443 PARITY is not given, no parity is used.
2445 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2446 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2447 is not given or nil, 1 stopbit is used.
2449 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2450 flowcontrol to be used, which is either nil (don't use flowcontrol),
2451 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2452 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2453 flowcontrol is used.
2455 `serial-process-configure' is called by `make-serial-process' for the
2456 initial configuration of the serial port.
2460 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2462 \(serial-process-configure
2463 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2465 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2467 usage: (serial-process-configure &rest ARGS) */)
2468 (ptrdiff_t nargs
, Lisp_Object
*args
)
2470 struct Lisp_Process
*p
;
2471 Lisp_Object contact
= Qnil
;
2472 Lisp_Object proc
= Qnil
;
2473 struct gcpro gcpro1
;
2475 contact
= Flist (nargs
, args
);
2478 proc
= Fplist_get (contact
, QCprocess
);
2480 proc
= Fplist_get (contact
, QCname
);
2482 proc
= Fplist_get (contact
, QCbuffer
);
2484 proc
= Fplist_get (contact
, QCport
);
2485 proc
= get_process (proc
);
2486 p
= XPROCESS (proc
);
2487 if (!EQ (p
->type
, Qserial
))
2488 error ("Not a serial process");
2490 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2496 serial_configure (p
, contact
);
2502 /* Used by make-serial-process to recover from errors. */
2504 make_serial_process_unwind (Lisp_Object proc
)
2506 if (!PROCESSP (proc
))
2508 remove_process (proc
);
2512 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2514 doc
: /* Create and return a serial port process.
2516 In Emacs, serial port connections are represented by process objects,
2517 so input and output work as for subprocesses, and `delete-process'
2518 closes a serial port connection. However, a serial process has no
2519 process id, it cannot be signaled, and the status codes are different
2520 from normal processes.
2522 `make-serial-process' creates a process and a buffer, on which you
2523 probably want to use `process-send-string'. Try \\[serial-term] for
2524 an interactive terminal. See below for examples.
2526 Arguments are specified as keyword/argument pairs. The following
2527 arguments are defined:
2529 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2530 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2531 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2532 the backslashes in strings).
2534 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2535 which this function calls.
2537 :name NAME -- NAME is the name of the process. If NAME is not given,
2538 the value of PORT is used.
2540 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2541 with the process. Process output goes at the end of that buffer,
2542 unless you specify an output stream or filter function to handle the
2543 output. If BUFFER is not given, the value of NAME is used.
2545 :coding CODING -- If CODING is a symbol, it specifies the coding
2546 system used for both reading and writing for this process. If CODING
2547 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2548 ENCODING is used for writing.
2550 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2551 the process is running. If BOOL is not given, query before exiting.
2553 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2554 In the stopped state, a serial process does not accept incoming data,
2555 but you can send outgoing data. The stopped state is cleared by
2556 `continue-process' and set by `stop-process'.
2558 :filter FILTER -- Install FILTER as the process filter.
2560 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2562 :plist PLIST -- Install PLIST as the initial plist of the process.
2568 -- This function calls `serial-process-configure' to handle these
2571 The original argument list, possibly modified by later configuration,
2572 is available via the function `process-contact'.
2576 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2578 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2580 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2582 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2584 usage: (make-serial-process &rest ARGS) */)
2585 (ptrdiff_t nargs
, Lisp_Object
*args
)
2588 Lisp_Object proc
, contact
, port
;
2589 struct Lisp_Process
*p
;
2590 struct gcpro gcpro1
;
2591 Lisp_Object name
, buffer
;
2592 Lisp_Object tem
, val
;
2593 ptrdiff_t specpdl_count
= -1;
2598 contact
= Flist (nargs
, args
);
2601 port
= Fplist_get (contact
, QCport
);
2603 error ("No port specified");
2604 CHECK_STRING (port
);
2606 if (NILP (Fplist_member (contact
, QCspeed
)))
2607 error (":speed not specified");
2608 if (!NILP (Fplist_get (contact
, QCspeed
)))
2609 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2611 name
= Fplist_get (contact
, QCname
);
2614 CHECK_STRING (name
);
2615 proc
= make_process (name
);
2616 specpdl_count
= SPECPDL_INDEX ();
2617 record_unwind_protect (make_serial_process_unwind
, proc
);
2618 p
= XPROCESS (proc
);
2620 fd
= serial_open (SSDATA (port
));
2623 if (fd
> max_process_desc
)
2624 max_process_desc
= fd
;
2625 chan_process
[fd
] = proc
;
2627 buffer
= Fplist_get (contact
, QCbuffer
);
2630 buffer
= Fget_buffer_create (buffer
);
2633 p
->childp
= contact
;
2634 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2636 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2637 p
->filter
= Fplist_get (contact
, QCfilter
);
2639 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2640 p
->kill_without_query
= 1;
2641 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2645 if (!EQ (p
->command
, Qt
))
2647 FD_SET (fd
, &input_wait_mask
);
2648 FD_SET (fd
, &non_keyboard_wait_mask
);
2651 if (BUFFERP (buffer
))
2653 set_marker_both (p
->mark
, buffer
,
2654 BUF_ZV (XBUFFER (buffer
)),
2655 BUF_ZV_BYTE (XBUFFER (buffer
)));
2658 tem
= Fplist_member (contact
, QCcoding
);
2659 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2665 val
= XCAR (XCDR (tem
));
2669 else if (!NILP (Vcoding_system_for_read
))
2670 val
= Vcoding_system_for_read
;
2671 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2672 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2674 p
->decode_coding_system
= val
;
2679 val
= XCAR (XCDR (tem
));
2683 else if (!NILP (Vcoding_system_for_write
))
2684 val
= Vcoding_system_for_write
;
2685 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2686 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2688 p
->encode_coding_system
= val
;
2690 setup_process_coding_systems (proc
);
2691 p
->decoding_buf
= empty_unibyte_string
;
2692 p
->decoding_carryover
= 0;
2693 p
->encoding_buf
= empty_unibyte_string
;
2694 p
->inherit_coding_system_flag
2695 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2697 Fserial_process_configure (nargs
, args
);
2699 specpdl_ptr
= specpdl
+ specpdl_count
;
2705 /* Create a network stream/datagram client/server process. Treated
2706 exactly like a normal process when reading and writing. Primary
2707 differences are in status display and process deletion. A network
2708 connection has no PID; you cannot signal it. All you can do is
2709 stop/continue it and deactivate/close it via delete-process */
2711 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2713 doc
: /* Create and return a network server or client process.
2715 In Emacs, network connections are represented by process objects, so
2716 input and output work as for subprocesses and `delete-process' closes
2717 a network connection. However, a network process has no process id,
2718 it cannot be signaled, and the status codes are different from normal
2721 Arguments are specified as keyword/argument pairs. The following
2722 arguments are defined:
2724 :name NAME -- NAME is name for process. It is modified if necessary
2727 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2728 with the process. Process output goes at end of that buffer, unless
2729 you specify an output stream or filter function to handle the output.
2730 BUFFER may be also nil, meaning that this process is not associated
2733 :host HOST -- HOST is name of the host to connect to, or its IP
2734 address. The symbol `local' specifies the local host. If specified
2735 for a server process, it must be a valid name or address for the local
2736 host, and only clients connecting to that address will be accepted.
2738 :service SERVICE -- SERVICE is name of the service desired, or an
2739 integer specifying a port number to connect to. If SERVICE is t,
2740 a random port number is selected for the server. (If Emacs was
2741 compiled with getaddrinfo, a port number can also be specified as a
2742 string, e.g. "80", as well as an integer. This is not portable.)
2744 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2745 stream type connection, `datagram' creates a datagram type connection,
2746 `seqpacket' creates a reliable datagram connection.
2748 :family FAMILY -- FAMILY is the address (and protocol) family for the
2749 service specified by HOST and SERVICE. The default (nil) is to use
2750 whatever address family (IPv4 or IPv6) that is defined for the host
2751 and port number specified by HOST and SERVICE. Other address families
2753 local -- for a local (i.e. UNIX) address specified by SERVICE.
2754 ipv4 -- use IPv4 address family only.
2755 ipv6 -- use IPv6 address family only.
2757 :local ADDRESS -- ADDRESS is the local address used for the connection.
2758 This parameter is ignored when opening a client process. When specified
2759 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2761 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2762 connection. This parameter is ignored when opening a stream server
2763 process. For a datagram server process, it specifies the initial
2764 setting of the remote datagram address. When specified for a client
2765 process, the FAMILY, HOST, and SERVICE args are ignored.
2767 The format of ADDRESS depends on the address family:
2768 - An IPv4 address is represented as an vector of integers [A B C D P]
2769 corresponding to numeric IP address A.B.C.D and port number P.
2770 - A local address is represented as a string with the address in the
2771 local address space.
2772 - An "unsupported family" address is represented by a cons (F . AV)
2773 where F is the family number and AV is a vector containing the socket
2774 address data with one element per address data byte. Do not rely on
2775 this format in portable code, as it may depend on implementation
2776 defined constants, data sizes, and data structure alignment.
2778 :coding CODING -- If CODING is a symbol, it specifies the coding
2779 system used for both reading and writing for this process. If CODING
2780 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2781 ENCODING is used for writing.
2783 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2784 return without waiting for the connection to complete; instead, the
2785 sentinel function will be called with second arg matching "open" (if
2786 successful) or "failed" when the connect completes. Default is to use
2787 a blocking connect (i.e. wait) for stream type connections.
2789 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2790 running when Emacs is exited.
2792 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2793 In the stopped state, a server process does not accept new
2794 connections, and a client process does not handle incoming traffic.
2795 The stopped state is cleared by `continue-process' and set by
2798 :filter FILTER -- Install FILTER as the process filter.
2800 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2801 process filter are multibyte, otherwise they are unibyte.
2802 If this keyword is not specified, the strings are multibyte if
2803 the default value of `enable-multibyte-characters' is non-nil.
2805 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2807 :log LOG -- Install LOG as the server process log function. This
2808 function is called when the server accepts a network connection from a
2809 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2810 is the server process, CLIENT is the new process for the connection,
2811 and MESSAGE is a string.
2813 :plist PLIST -- Install PLIST as the new process' initial plist.
2815 :server QLEN -- if QLEN is non-nil, create a server process for the
2816 specified FAMILY, SERVICE, and connection type (stream or datagram).
2817 If QLEN is an integer, it is used as the max. length of the server's
2818 pending connection queue (also known as the backlog); the default
2819 queue length is 5. Default is to create a client process.
2821 The following network options can be specified for this connection:
2823 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2824 :dontroute BOOL -- Only send to directly connected hosts.
2825 :keepalive BOOL -- Send keep-alive messages on network stream.
2826 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2827 :oobinline BOOL -- Place out-of-band data in receive data stream.
2828 :priority INT -- Set protocol defined priority for sent packets.
2829 :reuseaddr BOOL -- Allow reusing a recently used local address
2830 (this is allowed by default for a server process).
2831 :bindtodevice NAME -- bind to interface NAME. Using this may require
2832 special privileges on some systems.
2834 Consult the relevant system programmer's manual pages for more
2835 information on using these options.
2838 A server process will listen for and accept connections from clients.
2839 When a client connection is accepted, a new network process is created
2840 for the connection with the following parameters:
2842 - The client's process name is constructed by concatenating the server
2843 process' NAME and a client identification string.
2844 - If the FILTER argument is non-nil, the client process will not get a
2845 separate process buffer; otherwise, the client's process buffer is a newly
2846 created buffer named after the server process' BUFFER name or process
2847 NAME concatenated with the client identification string.
2848 - The connection type and the process filter and sentinel parameters are
2849 inherited from the server process' TYPE, FILTER and SENTINEL.
2850 - The client process' contact info is set according to the client's
2851 addressing information (typically an IP address and a port number).
2852 - The client process' plist is initialized from the server's plist.
2854 Notice that the FILTER and SENTINEL args are never used directly by
2855 the server process. Also, the BUFFER argument is not used directly by
2856 the server process, but via the optional :log function, accepted (and
2857 failed) connections may be logged in the server process' buffer.
2859 The original argument list, modified with the actual connection
2860 information, is available via the `process-contact' function.
2862 usage: (make-network-process &rest ARGS) */)
2863 (ptrdiff_t nargs
, Lisp_Object
*args
)
2866 Lisp_Object contact
;
2867 struct Lisp_Process
*p
;
2868 #ifdef HAVE_GETADDRINFO
2869 struct addrinfo ai
, *res
, *lres
;
2870 struct addrinfo hints
;
2871 const char *portstring
;
2873 #else /* HAVE_GETADDRINFO */
2874 struct _emacs_addrinfo
2880 struct sockaddr
*ai_addr
;
2881 struct _emacs_addrinfo
*ai_next
;
2883 #endif /* HAVE_GETADDRINFO */
2884 struct sockaddr_in address_in
;
2885 #ifdef HAVE_LOCAL_SOCKETS
2886 struct sockaddr_un address_un
;
2891 int s
= -1, outch
, inch
;
2892 struct gcpro gcpro1
;
2893 ptrdiff_t count
= SPECPDL_INDEX ();
2895 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2897 Lisp_Object name
, buffer
, host
, service
, address
;
2898 Lisp_Object filter
, sentinel
;
2899 int is_non_blocking_client
= 0;
2900 int is_server
= 0, backlog
= 5;
2907 /* Save arguments for process-contact and clone-process. */
2908 contact
= Flist (nargs
, args
);
2912 /* Ensure socket support is loaded if available. */
2913 init_winsock (TRUE
);
2916 /* :type TYPE (nil: stream, datagram */
2917 tem
= Fplist_get (contact
, QCtype
);
2919 socktype
= SOCK_STREAM
;
2920 #ifdef DATAGRAM_SOCKETS
2921 else if (EQ (tem
, Qdatagram
))
2922 socktype
= SOCK_DGRAM
;
2924 #ifdef HAVE_SEQPACKET
2925 else if (EQ (tem
, Qseqpacket
))
2926 socktype
= SOCK_SEQPACKET
;
2929 error ("Unsupported connection type");
2932 tem
= Fplist_get (contact
, QCserver
);
2935 /* Don't support network sockets when non-blocking mode is
2936 not available, since a blocked Emacs is not useful. */
2937 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2938 error ("Network servers not supported");
2941 if (TYPE_RANGED_INTEGERP (int, tem
))
2942 backlog
= XINT (tem
);
2946 /* Make QCaddress an alias for :local (server) or :remote (client). */
2947 QCaddress
= is_server
? QClocal
: QCremote
;
2950 if (!is_server
&& socktype
!= SOCK_DGRAM
2951 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2953 #ifndef NON_BLOCKING_CONNECT
2954 error ("Non-blocking connect not supported");
2956 is_non_blocking_client
= 1;
2960 name
= Fplist_get (contact
, QCname
);
2961 buffer
= Fplist_get (contact
, QCbuffer
);
2962 filter
= Fplist_get (contact
, QCfilter
);
2963 sentinel
= Fplist_get (contact
, QCsentinel
);
2965 CHECK_STRING (name
);
2967 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2968 ai
.ai_socktype
= socktype
;
2973 /* :local ADDRESS or :remote ADDRESS */
2974 address
= Fplist_get (contact
, QCaddress
);
2975 if (!NILP (address
))
2977 host
= service
= Qnil
;
2979 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2980 error ("Malformed :address");
2981 ai
.ai_family
= family
;
2982 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2983 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2987 /* :family FAMILY -- nil (for Inet), local, or integer. */
2988 tem
= Fplist_get (contact
, QCfamily
);
2991 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2997 #ifdef HAVE_LOCAL_SOCKETS
2998 else if (EQ (tem
, Qlocal
))
3002 else if (EQ (tem
, Qipv6
))
3005 else if (EQ (tem
, Qipv4
))
3007 else if (TYPE_RANGED_INTEGERP (int, tem
))
3008 family
= XINT (tem
);
3010 error ("Unknown address family");
3012 ai
.ai_family
= family
;
3014 /* :service SERVICE -- string, integer (port number), or t (random port). */
3015 service
= Fplist_get (contact
, QCservice
);
3017 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3018 host
= Fplist_get (contact
, QChost
);
3021 if (EQ (host
, Qlocal
))
3022 /* Depending on setup, "localhost" may map to different IPv4 and/or
3023 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3024 host
= build_string ("127.0.0.1");
3025 CHECK_STRING (host
);
3028 #ifdef HAVE_LOCAL_SOCKETS
3029 if (family
== AF_LOCAL
)
3033 message (":family local ignores the :host \"%s\" property",
3035 contact
= Fplist_put (contact
, QChost
, Qnil
);
3038 CHECK_STRING (service
);
3039 memset (&address_un
, 0, sizeof address_un
);
3040 address_un
.sun_family
= AF_LOCAL
;
3041 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3042 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3043 ai
.ai_addrlen
= sizeof address_un
;
3048 /* Slow down polling to every ten seconds.
3049 Some kernels have a bug which causes retrying connect to fail
3050 after a connect. Polling can interfere with gethostbyname too. */
3051 #ifdef POLL_FOR_INPUT
3052 if (socktype
!= SOCK_DGRAM
)
3054 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3055 bind_polling_period (10);
3059 #ifdef HAVE_GETADDRINFO
3060 /* If we have a host, use getaddrinfo to resolve both host and service.
3061 Otherwise, use getservbyname to lookup the service. */
3065 /* SERVICE can either be a string or int.
3066 Convert to a C string for later use by getaddrinfo. */
3067 if (EQ (service
, Qt
))
3069 else if (INTEGERP (service
))
3071 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3072 portstring
= portbuf
;
3076 CHECK_STRING (service
);
3077 portstring
= SSDATA (service
);
3082 memset (&hints
, 0, sizeof (hints
));
3084 hints
.ai_family
= family
;
3085 hints
.ai_socktype
= socktype
;
3086 hints
.ai_protocol
= 0;
3088 #ifdef HAVE_RES_INIT
3092 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3094 #ifdef HAVE_GAI_STRERROR
3095 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3097 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3103 #endif /* HAVE_GETADDRINFO */
3105 /* We end up here if getaddrinfo is not defined, or in case no hostname
3106 has been specified (e.g. for a local server process). */
3108 if (EQ (service
, Qt
))
3110 else if (INTEGERP (service
))
3111 port
= htons ((unsigned short) XINT (service
));
3114 struct servent
*svc_info
;
3115 CHECK_STRING (service
);
3116 svc_info
= getservbyname (SSDATA (service
),
3117 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3119 error ("Unknown service: %s", SDATA (service
));
3120 port
= svc_info
->s_port
;
3123 memset (&address_in
, 0, sizeof address_in
);
3124 address_in
.sin_family
= family
;
3125 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3126 address_in
.sin_port
= port
;
3128 #ifndef HAVE_GETADDRINFO
3131 struct hostent
*host_info_ptr
;
3133 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3134 as it may `hang' Emacs for a very long time. */
3138 #ifdef HAVE_RES_INIT
3142 host_info_ptr
= gethostbyname (SDATA (host
));
3147 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3148 host_info_ptr
->h_length
);
3149 family
= host_info_ptr
->h_addrtype
;
3150 address_in
.sin_family
= family
;
3153 /* Attempt to interpret host as numeric inet address */
3155 unsigned long numeric_addr
;
3156 numeric_addr
= inet_addr (SSDATA (host
));
3157 if (numeric_addr
== -1)
3158 error ("Unknown host \"%s\"", SDATA (host
));
3160 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3161 sizeof (address_in
.sin_addr
));
3165 #endif /* not HAVE_GETADDRINFO */
3167 ai
.ai_family
= family
;
3168 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3169 ai
.ai_addrlen
= sizeof address_in
;
3173 /* Do this in case we never enter the for-loop below. */
3174 count1
= SPECPDL_INDEX ();
3177 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3186 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3193 #ifdef DATAGRAM_SOCKETS
3194 if (!is_server
&& socktype
== SOCK_DGRAM
)
3196 #endif /* DATAGRAM_SOCKETS */
3198 #ifdef NON_BLOCKING_CONNECT
3199 if (is_non_blocking_client
)
3202 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3204 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3216 /* Make us close S if quit. */
3217 record_unwind_protect (close_file_unwind
, make_number (s
));
3219 /* Parse network options in the arg list.
3220 We simply ignore anything which isn't a known option (including other keywords).
3221 An error is signaled if setting a known option fails. */
3222 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3223 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3227 /* Configure as a server socket. */
3229 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3230 explicit :reuseaddr key to override this. */
3231 #ifdef HAVE_LOCAL_SOCKETS
3232 if (family
!= AF_LOCAL
)
3234 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3237 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3238 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3241 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3242 report_file_error ("Cannot bind server socket", Qnil
);
3244 #ifdef HAVE_GETSOCKNAME
3245 if (EQ (service
, Qt
))
3247 struct sockaddr_in sa1
;
3248 socklen_t len1
= sizeof (sa1
);
3249 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3251 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3252 service
= make_number (ntohs (sa1
.sin_port
));
3253 contact
= Fplist_put (contact
, QCservice
, service
);
3258 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3259 report_file_error ("Cannot listen on server socket", Qnil
);
3267 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3270 if (ret
== 0 || xerrno
== EISCONN
)
3272 /* The unwind-protect will be discarded afterwards.
3273 Likewise for immediate_quit. */
3277 #ifdef NON_BLOCKING_CONNECT
3279 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3283 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3290 if (xerrno
== EINTR
)
3292 /* Unlike most other syscalls connect() cannot be called
3293 again. (That would return EALREADY.) The proper way to
3294 wait for completion is select(). */
3302 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3309 report_file_error ("select failed", Qnil
);
3313 len
= sizeof xerrno
;
3314 eassert (FD_ISSET (s
, &fdset
));
3315 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3316 report_file_error ("getsockopt failed", Qnil
);
3318 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3322 #endif /* !WINDOWSNT */
3326 /* Discard the unwind protect closing S. */
3327 specpdl_ptr
= specpdl
+ count1
;
3332 if (xerrno
== EINTR
)
3339 #ifdef DATAGRAM_SOCKETS
3340 if (socktype
== SOCK_DGRAM
)
3342 if (datagram_address
[s
].sa
)
3344 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3345 datagram_address
[s
].len
= lres
->ai_addrlen
;
3349 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3350 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3353 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3354 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3355 conv_lisp_to_sockaddr (rfamily
, remote
,
3356 datagram_address
[s
].sa
, rlen
);
3360 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3363 contact
= Fplist_put (contact
, QCaddress
,
3364 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3365 #ifdef HAVE_GETSOCKNAME
3368 struct sockaddr_in sa1
;
3369 socklen_t len1
= sizeof (sa1
);
3370 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3371 contact
= Fplist_put (contact
, QClocal
,
3372 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3379 #ifdef HAVE_GETADDRINFO
3388 /* Discard the unwind protect for closing S, if any. */
3389 specpdl_ptr
= specpdl
+ count1
;
3391 /* Unwind bind_polling_period and request_sigio. */
3392 unbind_to (count
, Qnil
);
3396 /* If non-blocking got this far - and failed - assume non-blocking is
3397 not supported after all. This is probably a wrong assumption, but
3398 the normal blocking calls to open-network-stream handles this error
3400 if (is_non_blocking_client
)
3405 report_file_error ("make server process failed", contact
);
3407 report_file_error ("make client process failed", contact
);
3414 buffer
= Fget_buffer_create (buffer
);
3415 proc
= make_process (name
);
3417 chan_process
[inch
] = proc
;
3420 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3423 fcntl (inch
, F_SETFL
, O_NDELAY
);
3427 p
= XPROCESS (proc
);
3429 p
->childp
= contact
;
3430 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3434 p
->sentinel
= sentinel
;
3436 p
->log
= Fplist_get (contact
, QClog
);
3437 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3438 p
->kill_without_query
= 1;
3439 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3444 if (is_server
&& socktype
!= SOCK_DGRAM
)
3445 p
->status
= Qlisten
;
3447 /* Make the process marker point into the process buffer (if any). */
3448 if (BUFFERP (buffer
))
3449 set_marker_both (p
->mark
, buffer
,
3450 BUF_ZV (XBUFFER (buffer
)),
3451 BUF_ZV_BYTE (XBUFFER (buffer
)));
3453 #ifdef NON_BLOCKING_CONNECT
3454 if (is_non_blocking_client
)
3456 /* We may get here if connect did succeed immediately. However,
3457 in that case, we still need to signal this like a non-blocking
3459 p
->status
= Qconnect
;
3460 if (!FD_ISSET (inch
, &connect_wait_mask
))
3462 FD_SET (inch
, &connect_wait_mask
);
3463 FD_SET (inch
, &write_mask
);
3464 num_pending_connects
++;
3469 /* A server may have a client filter setting of Qt, but it must
3470 still listen for incoming connects unless it is stopped. */
3471 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3472 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3474 FD_SET (inch
, &input_wait_mask
);
3475 FD_SET (inch
, &non_keyboard_wait_mask
);
3478 if (inch
> max_process_desc
)
3479 max_process_desc
= inch
;
3481 tem
= Fplist_member (contact
, QCcoding
);
3482 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3483 tem
= Qnil
; /* No error message (too late!). */
3486 /* Setup coding systems for communicating with the network stream. */
3487 struct gcpro gcpro1
;
3488 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3489 Lisp_Object coding_systems
= Qt
;
3490 Lisp_Object fargs
[5], val
;
3494 val
= XCAR (XCDR (tem
));
3498 else if (!NILP (Vcoding_system_for_read
))
3499 val
= Vcoding_system_for_read
;
3500 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3501 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3502 /* We dare not decode end-of-line format by setting VAL to
3503 Qraw_text, because the existing Emacs Lisp libraries
3504 assume that they receive bare code including a sequence of
3509 if (NILP (host
) || NILP (service
))
3510 coding_systems
= Qnil
;
3513 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3514 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3516 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3519 if (CONSP (coding_systems
))
3520 val
= XCAR (coding_systems
);
3521 else if (CONSP (Vdefault_process_coding_system
))
3522 val
= XCAR (Vdefault_process_coding_system
);
3526 p
->decode_coding_system
= val
;
3530 val
= XCAR (XCDR (tem
));
3534 else if (!NILP (Vcoding_system_for_write
))
3535 val
= Vcoding_system_for_write
;
3536 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3540 if (EQ (coding_systems
, Qt
))
3542 if (NILP (host
) || NILP (service
))
3543 coding_systems
= Qnil
;
3546 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3547 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3549 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3553 if (CONSP (coding_systems
))
3554 val
= XCDR (coding_systems
);
3555 else if (CONSP (Vdefault_process_coding_system
))
3556 val
= XCDR (Vdefault_process_coding_system
);
3560 p
->encode_coding_system
= val
;
3562 setup_process_coding_systems (proc
);
3564 p
->decoding_buf
= empty_unibyte_string
;
3565 p
->decoding_carryover
= 0;
3566 p
->encoding_buf
= empty_unibyte_string
;
3568 p
->inherit_coding_system_flag
3569 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3576 #if defined (HAVE_NET_IF_H)
3579 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3580 doc
: /* Return an alist of all network interfaces and their network address.
3581 Each element is a cons, the car of which is a string containing the
3582 interface name, and the cdr is the network address in internal
3583 format; see the description of ADDRESS in `make-network-process'. */)
3586 struct ifconf ifconf
;
3587 struct ifreq
*ifreq
;
3589 ptrdiff_t buf_size
= 512;
3593 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3599 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3600 ifconf
.ifc_buf
= buf
;
3601 ifconf
.ifc_len
= buf_size
;
3602 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3609 while (ifconf
.ifc_len
== buf_size
);
3614 ifreq
= ifconf
.ifc_req
;
3615 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3617 struct ifreq
*ifq
= ifreq
;
3618 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3619 #define SIZEOF_IFREQ(sif) \
3620 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3621 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3623 int len
= SIZEOF_IFREQ (ifq
);
3625 int len
= sizeof (*ifreq
);
3627 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3629 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3631 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3634 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3635 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3636 res
= Fcons (Fcons (build_string (namebuf
),
3637 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3638 sizeof (struct sockaddr
))),
3645 #endif /* SIOCGIFCONF */
3647 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3651 const char *flag_sym
;
3654 static const struct ifflag_def ifflag_table
[] = {
3658 #ifdef IFF_BROADCAST
3659 { IFF_BROADCAST
, "broadcast" },
3662 { IFF_DEBUG
, "debug" },
3665 { IFF_LOOPBACK
, "loopback" },
3667 #ifdef IFF_POINTOPOINT
3668 { IFF_POINTOPOINT
, "pointopoint" },
3671 { IFF_RUNNING
, "running" },
3674 { IFF_NOARP
, "noarp" },
3677 { IFF_PROMISC
, "promisc" },
3679 #ifdef IFF_NOTRAILERS
3680 #ifdef NS_IMPL_COCOA
3681 /* Really means smart, notrailers is obsolete */
3682 { IFF_NOTRAILERS
, "smart" },
3684 { IFF_NOTRAILERS
, "notrailers" },
3688 { IFF_ALLMULTI
, "allmulti" },
3691 { IFF_MASTER
, "master" },
3694 { IFF_SLAVE
, "slave" },
3696 #ifdef IFF_MULTICAST
3697 { IFF_MULTICAST
, "multicast" },
3700 { IFF_PORTSEL
, "portsel" },
3702 #ifdef IFF_AUTOMEDIA
3703 { IFF_AUTOMEDIA
, "automedia" },
3706 { IFF_DYNAMIC
, "dynamic" },
3709 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3712 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3715 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3718 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3721 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3726 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3727 doc
: /* Return information about network interface named IFNAME.
3728 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3729 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3730 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3731 FLAGS is the current flags of the interface. */)
3732 (Lisp_Object ifname
)
3735 Lisp_Object res
= Qnil
;
3739 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3740 && defined HAVE_GETIFADDRS && defined LLADDR)
3741 struct ifaddrs
*ifap
;
3744 CHECK_STRING (ifname
);
3746 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3747 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3749 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3754 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3755 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3757 int flags
= rq
.ifr_flags
;
3758 const struct ifflag_def
*fp
;
3761 /* If flags is smaller than int (i.e. short) it may have the high bit set
3762 due to IFF_MULTICAST. In that case, sign extending it into
3764 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3765 flags
= (unsigned short) rq
.ifr_flags
;
3768 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3770 if (flags
& fp
->flag_bit
)
3772 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3773 flags
-= fp
->flag_bit
;
3776 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3780 elt
= Fcons (make_number (fnum
), elt
);
3785 res
= Fcons (elt
, res
);
3788 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3789 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3791 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3792 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3796 for (n
= 0; n
< 6; n
++)
3797 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3798 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3800 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3801 if (getifaddrs (&ifap
) != -1)
3803 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3804 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3807 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3809 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3810 unsigned char linkaddr
[6];
3813 if (it
->ifa_addr
->sa_family
!= AF_LINK
3814 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3815 || sdl
->sdl_alen
!= 6)
3818 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3819 for (n
= 0; n
< 6; n
++)
3820 p
->contents
[n
] = make_number (linkaddr
[n
]);
3822 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3826 #ifdef HAVE_FREEIFADDRS
3830 #endif /* HAVE_GETIFADDRS && LLADDR */
3832 res
= Fcons (elt
, res
);
3835 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3836 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3839 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3840 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3842 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3846 res
= Fcons (elt
, res
);
3849 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3850 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3853 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3856 res
= Fcons (elt
, res
);
3859 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3860 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3863 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3866 res
= Fcons (elt
, res
);
3870 return any
? res
: Qnil
;
3873 #endif /* defined (HAVE_NET_IF_H) */
3875 /* Turn off input and output for process PROC. */
3878 deactivate_process (Lisp_Object proc
)
3880 register int inchannel
, outchannel
;
3881 register struct Lisp_Process
*p
= XPROCESS (proc
);
3884 /* Delete GnuTLS structures in PROC, if any. */
3885 emacs_gnutls_deinit (proc
);
3886 #endif /* HAVE_GNUTLS */
3888 inchannel
= p
->infd
;
3889 outchannel
= p
->outfd
;
3891 #ifdef ADAPTIVE_READ_BUFFERING
3892 if (p
->read_output_delay
> 0)
3894 if (--process_output_delay_count
< 0)
3895 process_output_delay_count
= 0;
3896 p
->read_output_delay
= 0;
3897 p
->read_output_skip
= 0;
3903 /* Beware SIGCHLD hereabouts. */
3904 flush_pending_output (inchannel
);
3905 emacs_close (inchannel
);
3906 if (outchannel
>= 0 && outchannel
!= inchannel
)
3907 emacs_close (outchannel
);
3911 #ifdef DATAGRAM_SOCKETS
3912 if (DATAGRAM_CHAN_P (inchannel
))
3914 xfree (datagram_address
[inchannel
].sa
);
3915 datagram_address
[inchannel
].sa
= 0;
3916 datagram_address
[inchannel
].len
= 0;
3919 chan_process
[inchannel
] = Qnil
;
3920 FD_CLR (inchannel
, &input_wait_mask
);
3921 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3922 #ifdef NON_BLOCKING_CONNECT
3923 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3925 FD_CLR (inchannel
, &connect_wait_mask
);
3926 FD_CLR (inchannel
, &write_mask
);
3927 if (--num_pending_connects
< 0)
3931 if (inchannel
== max_process_desc
)
3934 /* We just closed the highest-numbered process input descriptor,
3935 so recompute the highest-numbered one now. */
3936 max_process_desc
= 0;
3937 for (i
= 0; i
< MAXDESC
; i
++)
3938 if (!NILP (chan_process
[i
]))
3939 max_process_desc
= i
;
3945 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3947 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3948 It is read into the process' buffers or given to their filter functions.
3949 Non-nil arg PROCESS means do not return until some output has been received
3952 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3953 and milliseconds to wait; return after that much time whether or not
3954 there is any subprocess output. If SECONDS is a floating point number,
3955 it specifies a fractional number of seconds to wait.
3956 The MILLISEC argument is obsolete and should be avoided.
3958 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3959 from PROCESS, suspending reading output from other processes.
3960 If JUST-THIS-ONE is an integer, don't run any timers either.
3961 Return non-nil if we received any output before the timeout expired. */)
3962 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3964 int secs
= -1, usecs
= 0;
3966 if (! NILP (process
))
3967 CHECK_PROCESS (process
);
3969 just_this_one
= Qnil
;
3971 if (!NILP (millisec
))
3972 { /* Obsolete calling convention using integers rather than floats. */
3973 CHECK_NUMBER (millisec
);
3975 seconds
= make_float (XINT (millisec
) / 1000.0);
3978 CHECK_NUMBER (seconds
);
3979 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3983 if (!NILP (seconds
))
3985 double duration
= extract_float (seconds
);
3987 duration_to_sec_usec (duration
, &secs
, &usecs
);
3989 else if (!NILP (process
))
3993 (wait_reading_process_output (secs
, usecs
, 0, 0,
3995 !NILP (process
) ? XPROCESS (process
) : NULL
,
3996 NILP (just_this_one
) ? 0 :
3997 !INTEGERP (just_this_one
) ? 1 : -1)
4001 /* Accept a connection for server process SERVER on CHANNEL. */
4003 static int connect_counter
= 0;
4006 server_accept_connection (Lisp_Object server
, int channel
)
4008 Lisp_Object proc
, caller
, name
, buffer
;
4009 Lisp_Object contact
, host
, service
;
4010 struct Lisp_Process
*ps
= XPROCESS (server
);
4011 struct Lisp_Process
*p
;
4015 struct sockaddr_in in
;
4017 struct sockaddr_in6 in6
;
4019 #ifdef HAVE_LOCAL_SOCKETS
4020 struct sockaddr_un un
;
4023 socklen_t len
= sizeof saddr
;
4025 s
= accept (channel
, &saddr
.sa
, &len
);
4034 if (code
== EWOULDBLOCK
)
4038 if (!NILP (ps
->log
))
4039 call3 (ps
->log
, server
, Qnil
,
4040 concat3 (build_string ("accept failed with code"),
4041 Fnumber_to_string (make_number (code
)),
4042 build_string ("\n")));
4048 /* Setup a new process to handle the connection. */
4050 /* Generate a unique identification of the caller, and build contact
4051 information for this process. */
4054 switch (saddr
.sa
.sa_family
)
4058 Lisp_Object args
[5];
4059 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4060 args
[0] = build_string ("%d.%d.%d.%d");
4061 args
[1] = make_number (*ip
++);
4062 args
[2] = make_number (*ip
++);
4063 args
[3] = make_number (*ip
++);
4064 args
[4] = make_number (*ip
++);
4065 host
= Fformat (5, args
);
4066 service
= make_number (ntohs (saddr
.in
.sin_port
));
4068 args
[0] = build_string (" <%s:%d>");
4071 caller
= Fformat (3, args
);
4078 Lisp_Object args
[9];
4079 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4081 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4082 for (i
= 0; i
< 8; i
++)
4083 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4084 host
= Fformat (9, args
);
4085 service
= make_number (ntohs (saddr
.in
.sin_port
));
4087 args
[0] = build_string (" <[%s]:%d>");
4090 caller
= Fformat (3, args
);
4095 #ifdef HAVE_LOCAL_SOCKETS
4099 caller
= Fnumber_to_string (make_number (connect_counter
));
4100 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4104 /* Create a new buffer name for this process if it doesn't have a
4105 filter. The new buffer name is based on the buffer name or
4106 process name of the server process concatenated with the caller
4109 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4113 buffer
= ps
->buffer
;
4115 buffer
= Fbuffer_name (buffer
);
4120 buffer
= concat2 (buffer
, caller
);
4121 buffer
= Fget_buffer_create (buffer
);
4125 /* Generate a unique name for the new server process. Combine the
4126 server process name with the caller identification. */
4128 name
= concat2 (ps
->name
, caller
);
4129 proc
= make_process (name
);
4131 chan_process
[s
] = proc
;
4134 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4137 fcntl (s
, F_SETFL
, O_NDELAY
);
4141 p
= XPROCESS (proc
);
4143 /* Build new contact information for this setup. */
4144 contact
= Fcopy_sequence (ps
->childp
);
4145 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4146 contact
= Fplist_put (contact
, QChost
, host
);
4147 if (!NILP (service
))
4148 contact
= Fplist_put (contact
, QCservice
, service
);
4149 contact
= Fplist_put (contact
, QCremote
,
4150 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4151 #ifdef HAVE_GETSOCKNAME
4153 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4154 contact
= Fplist_put (contact
, QClocal
,
4155 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4158 p
->childp
= contact
;
4159 p
->plist
= Fcopy_sequence (ps
->plist
);
4163 p
->sentinel
= ps
->sentinel
;
4164 p
->filter
= ps
->filter
;
4171 /* Client processes for accepted connections are not stopped initially. */
4172 if (!EQ (p
->filter
, Qt
))
4174 FD_SET (s
, &input_wait_mask
);
4175 FD_SET (s
, &non_keyboard_wait_mask
);
4178 if (s
> max_process_desc
)
4179 max_process_desc
= s
;
4181 /* Setup coding system for new process based on server process.
4182 This seems to be the proper thing to do, as the coding system
4183 of the new process should reflect the settings at the time the
4184 server socket was opened; not the current settings. */
4186 p
->decode_coding_system
= ps
->decode_coding_system
;
4187 p
->encode_coding_system
= ps
->encode_coding_system
;
4188 setup_process_coding_systems (proc
);
4190 p
->decoding_buf
= empty_unibyte_string
;
4191 p
->decoding_carryover
= 0;
4192 p
->encoding_buf
= empty_unibyte_string
;
4194 p
->inherit_coding_system_flag
4195 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4197 if (!NILP (ps
->log
))
4198 call3 (ps
->log
, server
, proc
,
4199 concat3 (build_string ("accept from "),
4200 (STRINGP (host
) ? host
: build_string ("-")),
4201 build_string ("\n")));
4203 if (!NILP (p
->sentinel
))
4204 exec_sentinel (proc
,
4205 concat3 (build_string ("open from "),
4206 (STRINGP (host
) ? host
: build_string ("-")),
4207 build_string ("\n")));
4210 /* This variable is different from waiting_for_input in keyboard.c.
4211 It is used to communicate to a lisp process-filter/sentinel (via the
4212 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4213 for user-input when that process-filter was called.
4214 waiting_for_input cannot be used as that is by definition 0 when
4215 lisp code is being evalled.
4216 This is also used in record_asynch_buffer_change.
4217 For that purpose, this must be 0
4218 when not inside wait_reading_process_output. */
4219 static int waiting_for_user_input_p
;
4222 wait_reading_process_output_unwind (Lisp_Object data
)
4224 waiting_for_user_input_p
= XINT (data
);
4228 /* This is here so breakpoints can be put on it. */
4230 wait_reading_process_output_1 (void)
4234 /* Use a wrapper around select to work around a bug in gdb 5.3.
4235 Normally, the wrapper is optimized away by inlining.
4237 If emacs is stopped inside select, the gdb backtrace doesn't
4238 show the function which called select, so it is practically
4239 impossible to step through wait_reading_process_output. */
4243 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4245 return select (n
, rfd
, wfd
, xfd
, tmo
);
4247 #define select select_wrapper
4250 /* Read and dispose of subprocess output while waiting for timeout to
4251 elapse and/or keyboard input to be available.
4254 timeout in seconds, or
4255 zero for no limit, or
4256 -1 means gobble data immediately available but don't wait for any.
4259 an additional duration to wait, measured in microseconds.
4260 If this is nonzero and time_limit is 0, then the timeout
4261 consists of MICROSECS only.
4263 READ_KBD is a lisp value:
4264 0 to ignore keyboard input, or
4265 1 to return when input is available, or
4266 -1 meaning caller will actually read the input, so don't throw to
4267 the quit handler, or
4269 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4270 output that arrives.
4272 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4273 (and gobble terminal input into the buffer if any arrives).
4275 If WAIT_PROC is specified, wait until something arrives from that
4276 process. The return value is true if we read some input from
4279 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4280 (suspending output from other processes). A negative value
4281 means don't run any timers either.
4283 If WAIT_PROC is specified, then the function returns true if we
4284 received input from that process before the timeout elapsed.
4285 Otherwise, return true if we received input from any process. */
4288 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4290 Lisp_Object wait_for_cell
,
4291 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4293 register int channel
, nfds
;
4294 SELECT_TYPE Available
;
4295 SELECT_TYPE Writeok
;
4297 int check_delay
, no_avail
;
4300 EMACS_TIME timeout
, end_time
;
4301 int wait_channel
= -1;
4302 int got_some_input
= 0;
4303 ptrdiff_t count
= SPECPDL_INDEX ();
4305 FD_ZERO (&Available
);
4308 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4309 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4310 message ("Blocking call to accept-process-output with quit inhibited!!");
4312 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4313 if (wait_proc
!= NULL
)
4314 wait_channel
= wait_proc
->infd
;
4316 record_unwind_protect (wait_reading_process_output_unwind
,
4317 make_number (waiting_for_user_input_p
));
4318 waiting_for_user_input_p
= read_kbd
;
4320 /* Since we may need to wait several times,
4321 compute the absolute time to return at. */
4322 if (time_limit
|| microsecs
)
4324 EMACS_GET_TIME (end_time
);
4325 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4326 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4331 int timeout_reduced_for_timers
= 0;
4333 /* If calling from keyboard input, do not quit
4334 since we want to return C-g as an input character.
4335 Otherwise, do pending quit if requested. */
4340 process_pending_signals ();
4343 /* Exit now if the cell we're waiting for became non-nil. */
4344 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4347 /* Compute time from now till when time limit is up */
4348 /* Exit if already run out */
4349 if (time_limit
== -1)
4351 /* -1 specified for timeout means
4352 gobble output available now
4353 but don't wait at all. */
4355 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4357 else if (time_limit
|| microsecs
)
4359 EMACS_GET_TIME (timeout
);
4360 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4361 if (EMACS_TIME_NEG_P (timeout
))
4366 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4369 /* Normally we run timers here.
4370 But not if wait_for_cell; in those cases,
4371 the wait is supposed to be short,
4372 and those callers cannot handle running arbitrary Lisp code here. */
4373 if (NILP (wait_for_cell
)
4374 && just_wait_proc
>= 0)
4376 EMACS_TIME timer_delay
;
4380 int old_timers_run
= timers_run
;
4381 struct buffer
*old_buffer
= current_buffer
;
4382 Lisp_Object old_window
= selected_window
;
4384 timer_delay
= timer_check ();
4386 /* If a timer has run, this might have changed buffers
4387 an alike. Make read_key_sequence aware of that. */
4388 if (timers_run
!= old_timers_run
4389 && (old_buffer
!= current_buffer
4390 || !EQ (old_window
, selected_window
))
4391 && waiting_for_user_input_p
== -1)
4392 record_asynch_buffer_change ();
4394 if (timers_run
!= old_timers_run
&& do_display
)
4395 /* We must retry, since a timer may have requeued itself
4396 and that could alter the time_delay. */
4397 redisplay_preserve_echo_area (9);
4401 while (!detect_input_pending ());
4403 /* If there is unread keyboard input, also return. */
4405 && requeued_events_pending_p ())
4408 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4410 EMACS_TIME difference
;
4411 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4412 if (EMACS_TIME_NEG_P (difference
))
4414 timeout
= timer_delay
;
4415 timeout_reduced_for_timers
= 1;
4418 /* If time_limit is -1, we are not going to wait at all. */
4419 else if (time_limit
!= -1)
4421 /* This is so a breakpoint can be put here. */
4422 wait_reading_process_output_1 ();
4426 /* Cause C-g and alarm signals to take immediate action,
4427 and cause input available signals to zero out timeout.
4429 It is important that we do this before checking for process
4430 activity. If we get a SIGCHLD after the explicit checks for
4431 process activity, timeout is the only way we will know. */
4433 set_waiting_for_input (&timeout
);
4435 /* If status of something has changed, and no input is
4436 available, notify the user of the change right away. After
4437 this explicit check, we'll let the SIGCHLD handler zap
4438 timeout to get our attention. */
4439 if (update_tick
!= process_tick
)
4444 if (kbd_on_hold_p ())
4447 Atemp
= input_wait_mask
;
4450 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4451 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4453 #ifdef NON_BLOCKING_CONNECT
4454 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4458 (SELECT_TYPE
*)0, &timeout
)
4461 /* It's okay for us to do this and then continue with
4462 the loop, since timeout has already been zeroed out. */
4463 clear_waiting_for_input ();
4464 status_notify (NULL
);
4465 if (do_display
) redisplay_preserve_echo_area (13);
4469 /* Don't wait for output from a non-running process. Just
4470 read whatever data has already been received. */
4471 if (wait_proc
&& wait_proc
->raw_status_new
)
4472 update_status (wait_proc
);
4474 && ! EQ (wait_proc
->status
, Qrun
)
4475 && ! EQ (wait_proc
->status
, Qconnect
))
4477 int nread
, total_nread
= 0;
4479 clear_waiting_for_input ();
4480 XSETPROCESS (proc
, wait_proc
);
4482 /* Read data from the process, until we exhaust it. */
4483 while (wait_proc
->infd
>= 0)
4485 nread
= read_process_output (proc
, wait_proc
->infd
);
4492 total_nread
+= nread
;
4496 else if (nread
== -1 && EIO
== errno
)
4500 else if (nread
== -1 && EAGAIN
== errno
)
4504 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4508 if (total_nread
> 0 && do_display
)
4509 redisplay_preserve_echo_area (10);
4514 /* Wait till there is something to do */
4516 if (wait_proc
&& just_wait_proc
)
4518 if (wait_proc
->infd
< 0) /* Terminated */
4520 FD_SET (wait_proc
->infd
, &Available
);
4524 else if (!NILP (wait_for_cell
))
4526 Available
= non_process_wait_mask
;
4533 Available
= non_keyboard_wait_mask
;
4535 Available
= input_wait_mask
;
4536 Writeok
= write_mask
;
4537 #ifdef SELECT_CANT_DO_WRITE_MASK
4542 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4545 /* If frame size has changed or the window is newly mapped,
4546 redisplay now, before we start to wait. There is a race
4547 condition here; if a SIGIO arrives between now and the select
4548 and indicates that a frame is trashed, the select may block
4549 displaying a trashed screen. */
4550 if (frame_garbaged
&& do_display
)
4552 clear_waiting_for_input ();
4553 redisplay_preserve_echo_area (11);
4555 set_waiting_for_input (&timeout
);
4558 /* Skip the `select' call if input is available and we're
4559 waiting for keyboard input or a cell change (which can be
4560 triggered by processing X events). In the latter case, set
4561 nfds to 1 to avoid breaking the loop. */
4563 if ((read_kbd
|| !NILP (wait_for_cell
))
4564 && detect_input_pending ())
4566 nfds
= read_kbd
? 0 : 1;
4573 #ifdef ADAPTIVE_READ_BUFFERING
4574 /* Set the timeout for adaptive read buffering if any
4575 process has non-zero read_output_skip and non-zero
4576 read_output_delay, and we are not reading output for a
4577 specific wait_channel. It is not executed if
4578 Vprocess_adaptive_read_buffering is nil. */
4579 if (process_output_skip
&& check_delay
> 0)
4581 int usecs
= EMACS_USECS (timeout
);
4582 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4583 usecs
= READ_OUTPUT_DELAY_MAX
;
4584 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4586 proc
= chan_process
[channel
];
4589 /* Find minimum non-zero read_output_delay among the
4590 processes with non-zero read_output_skip. */
4591 if (XPROCESS (proc
)->read_output_delay
> 0)
4594 if (!XPROCESS (proc
)->read_output_skip
)
4596 FD_CLR (channel
, &Available
);
4597 XPROCESS (proc
)->read_output_skip
= 0;
4598 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4599 usecs
= XPROCESS (proc
)->read_output_delay
;
4602 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4603 process_output_skip
= 0;
4606 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4608 #elif defined (HAVE_NS)
4613 (max (max_process_desc
, max_input_desc
) + 1,
4615 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4616 (SELECT_TYPE
*)0, &timeout
);
4619 /* GnuTLS buffers data internally. In lowat mode it leaves
4620 some data in the TCP buffers so that select works, but
4621 with custom pull/push functions we need to check if some
4622 data is available in the buffers manually. */
4627 /* We're not waiting on a specific process, so loop
4628 through all the channels and check for data.
4629 This is a workaround needed for some versions of
4630 the gnutls library -- 2.12.14 has been confirmed
4632 http://comments.gmane.org/gmane.emacs.devel/145074 */
4633 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4634 if (! NILP (chan_process
[channel
]))
4636 struct Lisp_Process
*p
=
4637 XPROCESS (chan_process
[channel
]);
4638 if (p
&& p
->gnutls_p
&& p
->infd
4639 && ((emacs_gnutls_record_check_pending
4644 FD_SET (p
->infd
, &Available
);
4650 /* Check this specific channel. */
4651 if (wait_proc
->gnutls_p
/* Check for valid process. */
4652 /* Do we have pending data? */
4653 && ((emacs_gnutls_record_check_pending
4654 (wait_proc
->gnutls_state
))
4658 /* Set to Available. */
4659 FD_SET (wait_proc
->infd
, &Available
);
4668 /* Make C-g and alarm signals set flags again */
4669 clear_waiting_for_input ();
4671 /* If we woke up due to SIGWINCH, actually change size now. */
4672 do_pending_window_change (0);
4674 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4675 /* We wanted the full specified time, so return now. */
4679 if (xerrno
== EINTR
)
4681 else if (xerrno
== EBADF
)
4684 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4685 the child's closure of the pts gives the parent a SIGHUP, and
4686 the ptc file descriptor is automatically closed,
4687 yielding EBADF here or at select() call above.
4688 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4689 in m/ibmrt-aix.h), and here we just ignore the select error.
4690 Cleanup occurs c/o status_notify after SIGCLD. */
4691 no_avail
= 1; /* Cannot depend on values returned */
4697 error ("select error: %s", emacs_strerror (xerrno
));
4702 FD_ZERO (&Available
);
4706 #if 0 /* When polling is used, interrupt_input is 0,
4707 so get_input_pending should read the input.
4708 So this should not be needed. */
4709 /* If we are using polling for input,
4710 and we see input available, make it get read now.
4711 Otherwise it might not actually get read for a second.
4712 And on hpux, since we turn off polling in wait_reading_process_output,
4713 it might never get read at all if we don't spend much time
4714 outside of wait_reading_process_output. */
4715 if (read_kbd
&& interrupt_input
4716 && keyboard_bit_set (&Available
)
4717 && input_polling_used ())
4718 kill (getpid (), SIGALRM
);
4721 /* Check for keyboard input */
4722 /* If there is any, return immediately
4723 to give it higher priority than subprocesses */
4727 int old_timers_run
= timers_run
;
4728 struct buffer
*old_buffer
= current_buffer
;
4729 Lisp_Object old_window
= selected_window
;
4732 if (detect_input_pending_run_timers (do_display
))
4734 swallow_events (do_display
);
4735 if (detect_input_pending_run_timers (do_display
))
4739 /* If a timer has run, this might have changed buffers
4740 an alike. Make read_key_sequence aware of that. */
4741 if (timers_run
!= old_timers_run
4742 && waiting_for_user_input_p
== -1
4743 && (old_buffer
!= current_buffer
4744 || !EQ (old_window
, selected_window
)))
4745 record_asynch_buffer_change ();
4751 /* If there is unread keyboard input, also return. */
4753 && requeued_events_pending_p ())
4756 /* If we are not checking for keyboard input now,
4757 do process events (but don't run any timers).
4758 This is so that X events will be processed.
4759 Otherwise they may have to wait until polling takes place.
4760 That would causes delays in pasting selections, for example.
4762 (We used to do this only if wait_for_cell.) */
4763 if (read_kbd
== 0 && detect_input_pending ())
4765 swallow_events (do_display
);
4766 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4767 if (detect_input_pending ())
4772 /* Exit now if the cell we're waiting for became non-nil. */
4773 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4777 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4778 go read it. This can happen with X on BSD after logging out.
4779 In that case, there really is no input and no SIGIO,
4780 but select says there is input. */
4782 if (read_kbd
&& interrupt_input
4783 && keyboard_bit_set (&Available
) && ! noninteractive
)
4784 kill (getpid (), SIGIO
);
4788 got_some_input
|= nfds
> 0;
4790 /* If checking input just got us a size-change event from X,
4791 obey it now if we should. */
4792 if (read_kbd
|| ! NILP (wait_for_cell
))
4793 do_pending_window_change (0);
4795 /* Check for data from a process. */
4796 if (no_avail
|| nfds
== 0)
4799 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4801 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4802 if (FD_ISSET (channel
, &Available
)
4804 && (d
->condition
& FOR_READ
) != 0)
4805 d
->func (channel
, d
->data
, 1);
4806 if (FD_ISSET (channel
, &write_mask
)
4808 && (d
->condition
& FOR_WRITE
) != 0)
4809 d
->func (channel
, d
->data
, 0);
4812 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4814 if (FD_ISSET (channel
, &Available
)
4815 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4816 && !FD_ISSET (channel
, &non_process_wait_mask
))
4820 /* If waiting for this channel, arrange to return as
4821 soon as no more input to be processed. No more
4823 if (wait_channel
== channel
)
4829 proc
= chan_process
[channel
];
4833 /* If this is a server stream socket, accept connection. */
4834 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4836 server_accept_connection (proc
, channel
);
4840 /* Read data from the process, starting with our
4841 buffered-ahead character if we have one. */
4843 nread
= read_process_output (proc
, channel
);
4846 /* Since read_process_output can run a filter,
4847 which can call accept-process-output,
4848 don't try to read from any other processes
4849 before doing the select again. */
4850 FD_ZERO (&Available
);
4853 redisplay_preserve_echo_area (12);
4856 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4859 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4860 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4862 else if (nread
== -1 && errno
== EAGAIN
)
4866 else if (nread
== -1 && errno
== EAGAIN
)
4868 /* Note that we cannot distinguish between no input
4869 available now and a closed pipe.
4870 With luck, a closed pipe will be accompanied by
4871 subprocess termination and SIGCHLD. */
4872 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4874 #endif /* O_NDELAY */
4875 #endif /* O_NONBLOCK */
4877 /* On some OSs with ptys, when the process on one end of
4878 a pty exits, the other end gets an error reading with
4879 errno = EIO instead of getting an EOF (0 bytes read).
4880 Therefore, if we get an error reading and errno =
4881 EIO, just continue, because the child process has
4882 exited and should clean itself up soon (e.g. when we
4885 However, it has been known to happen that the SIGCHLD
4886 got lost. So raise the signal again just in case.
4888 else if (nread
== -1 && errno
== EIO
)
4890 struct Lisp_Process
*p
= XPROCESS (proc
);
4892 /* Clear the descriptor now, so we only raise the
4894 FD_CLR (channel
, &input_wait_mask
);
4895 FD_CLR (channel
, &non_keyboard_wait_mask
);
4899 /* If the EIO occurs on a pty, sigchld_handler's
4900 wait3() will not find the process object to
4901 delete. Do it here. */
4902 p
->tick
= ++process_tick
;
4903 p
->status
= Qfailed
;
4906 kill (getpid (), SIGCHLD
);
4908 #endif /* HAVE_PTYS */
4909 /* If we can detect process termination, don't consider the
4910 process gone just because its pipe is closed. */
4912 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4917 /* Preserve status of processes already terminated. */
4918 XPROCESS (proc
)->tick
= ++process_tick
;
4919 deactivate_process (proc
);
4920 if (XPROCESS (proc
)->raw_status_new
)
4921 update_status (XPROCESS (proc
));
4922 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4923 XPROCESS (proc
)->status
4924 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4927 #ifdef NON_BLOCKING_CONNECT
4928 if (FD_ISSET (channel
, &Writeok
)
4929 && FD_ISSET (channel
, &connect_wait_mask
))
4931 struct Lisp_Process
*p
;
4933 FD_CLR (channel
, &connect_wait_mask
);
4934 FD_CLR (channel
, &write_mask
);
4935 if (--num_pending_connects
< 0)
4938 proc
= chan_process
[channel
];
4942 p
= XPROCESS (proc
);
4945 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4946 So only use it on systems where it is known to work. */
4948 socklen_t xlen
= sizeof (xerrno
);
4949 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4954 struct sockaddr pname
;
4955 int pnamelen
= sizeof (pname
);
4957 /* If connection failed, getpeername will fail. */
4959 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4961 /* Obtain connect failure code through error slippage. */
4964 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4971 p
->tick
= ++process_tick
;
4972 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4973 deactivate_process (proc
);
4978 /* Execute the sentinel here. If we had relied on
4979 status_notify to do it later, it will read input
4980 from the process before calling the sentinel. */
4981 exec_sentinel (proc
, build_string ("open\n"));
4982 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4984 FD_SET (p
->infd
, &input_wait_mask
);
4985 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4989 #endif /* NON_BLOCKING_CONNECT */
4990 } /* end for each file descriptor */
4991 } /* end while exit conditions not met */
4993 unbind_to (count
, Qnil
);
4995 /* If calling from keyboard input, do not quit
4996 since we want to return C-g as an input character.
4997 Otherwise, do pending quit if requested. */
5000 /* Prevent input_pending from remaining set if we quit. */
5001 clear_input_pending ();
5005 return got_some_input
;
5008 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5011 read_process_output_call (Lisp_Object fun_and_args
)
5013 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5017 read_process_output_error_handler (Lisp_Object error_val
)
5019 cmd_error_internal (error_val
, "error in process filter: ");
5021 update_echo_area ();
5022 Fsleep_for (make_number (2), Qnil
);
5026 /* Read pending output from the process channel,
5027 starting with our buffered-ahead character if we have one.
5028 Yield number of decoded characters read.
5030 This function reads at most 4096 characters.
5031 If you want to read all available subprocess output,
5032 you must call it repeatedly until it returns zero.
5034 The characters read are decoded according to PROC's coding-system
5038 read_process_output (Lisp_Object proc
, register int channel
)
5040 register ssize_t nbytes
;
5042 register Lisp_Object outstream
;
5043 register struct Lisp_Process
*p
= XPROCESS (proc
);
5044 register ptrdiff_t opoint
;
5045 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5046 int carryover
= p
->decoding_carryover
;
5048 ptrdiff_t count
= SPECPDL_INDEX ();
5049 Lisp_Object odeactivate
;
5051 chars
= (char *) alloca (carryover
+ readmax
);
5053 /* See the comment above. */
5054 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5056 #ifdef DATAGRAM_SOCKETS
5057 /* We have a working select, so proc_buffered_char is always -1. */
5058 if (DATAGRAM_CHAN_P (channel
))
5060 socklen_t len
= datagram_address
[channel
].len
;
5061 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5062 0, datagram_address
[channel
].sa
, &len
);
5067 int buffered
= 0 <= proc_buffered_char
[channel
];
5070 chars
[carryover
] = proc_buffered_char
[channel
];
5071 proc_buffered_char
[channel
] = -1;
5075 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5076 readmax
- buffered
);
5079 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5080 readmax
- buffered
);
5081 #ifdef ADAPTIVE_READ_BUFFERING
5082 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5084 int delay
= p
->read_output_delay
;
5087 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5090 process_output_delay_count
++;
5091 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5094 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5096 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5098 process_output_delay_count
--;
5100 p
->read_output_delay
= delay
;
5103 p
->read_output_skip
= 1;
5104 process_output_skip
= 1;
5109 nbytes
+= buffered
&& nbytes
<= 0;
5112 p
->decoding_carryover
= 0;
5114 /* At this point, NBYTES holds number of bytes just received
5115 (including the one in proc_buffered_char[channel]). */
5118 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5120 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5123 /* Now set NBYTES how many bytes we must decode. */
5124 nbytes
+= carryover
;
5126 odeactivate
= Vdeactivate_mark
;
5127 /* There's no good reason to let process filters change the current
5128 buffer, and many callers of accept-process-output, sit-for, and
5129 friends don't expect current-buffer to be changed from under them. */
5130 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5132 /* Read and dispose of the process output. */
5133 outstream
= p
->filter
;
5134 if (!NILP (outstream
))
5137 int outer_running_asynch_code
= running_asynch_code
;
5138 int waiting
= waiting_for_user_input_p
;
5140 /* No need to gcpro these, because all we do with them later
5141 is test them for EQness, and none of them should be a string. */
5143 Lisp_Object obuffer
, okeymap
;
5144 XSETBUFFER (obuffer
, current_buffer
);
5145 okeymap
= BVAR (current_buffer
, keymap
);
5148 /* We inhibit quit here instead of just catching it so that
5149 hitting ^G when a filter happens to be running won't screw
5151 specbind (Qinhibit_quit
, Qt
);
5152 specbind (Qlast_nonmenu_event
, Qt
);
5154 /* In case we get recursively called,
5155 and we already saved the match data nonrecursively,
5156 save the same match data in safely recursive fashion. */
5157 if (outer_running_asynch_code
)
5160 /* Don't clobber the CURRENT match data, either! */
5161 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5162 restore_search_regs ();
5163 record_unwind_save_match_data ();
5164 Fset_match_data (tem
, Qt
);
5167 /* For speed, if a search happens within this code,
5168 save the match data in a special nonrecursive fashion. */
5169 running_asynch_code
= 1;
5171 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5172 text
= coding
->dst_object
;
5173 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5174 /* A new coding system might be found. */
5175 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5177 p
->decode_coding_system
= Vlast_coding_system_used
;
5179 /* Don't call setup_coding_system for
5180 proc_decode_coding_system[channel] here. It is done in
5181 detect_coding called via decode_coding above. */
5183 /* If a coding system for encoding is not yet decided, we set
5184 it as the same as coding-system for decoding.
5186 But, before doing that we must check if
5187 proc_encode_coding_system[p->outfd] surely points to a
5188 valid memory because p->outfd will be changed once EOF is
5189 sent to the process. */
5190 if (NILP (p
->encode_coding_system
)
5191 && proc_encode_coding_system
[p
->outfd
])
5193 p
->encode_coding_system
5194 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5195 setup_coding_system (p
->encode_coding_system
,
5196 proc_encode_coding_system
[p
->outfd
]);
5200 if (coding
->carryover_bytes
> 0)
5202 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5203 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5204 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5205 coding
->carryover_bytes
);
5206 p
->decoding_carryover
= coding
->carryover_bytes
;
5208 if (SBYTES (text
) > 0)
5209 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5210 sometimes it's simply wrong to wrap (e.g. when called from
5211 accept-process-output). */
5212 internal_condition_case_1 (read_process_output_call
,
5214 Fcons (proc
, Fcons (text
, Qnil
))),
5215 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5216 read_process_output_error_handler
);
5218 /* If we saved the match data nonrecursively, restore it now. */
5219 restore_search_regs ();
5220 running_asynch_code
= outer_running_asynch_code
;
5222 /* Restore waiting_for_user_input_p as it was
5223 when we were called, in case the filter clobbered it. */
5224 waiting_for_user_input_p
= waiting
;
5226 #if 0 /* Call record_asynch_buffer_change unconditionally,
5227 because we might have changed minor modes or other things
5228 that affect key bindings. */
5229 if (! EQ (Fcurrent_buffer (), obuffer
)
5230 || ! EQ (current_buffer
->keymap
, okeymap
))
5232 /* But do it only if the caller is actually going to read events.
5233 Otherwise there's no need to make him wake up, and it could
5234 cause trouble (for example it would make sit_for return). */
5235 if (waiting_for_user_input_p
== -1)
5236 record_asynch_buffer_change ();
5239 /* If no filter, write into buffer if it isn't dead. */
5240 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5242 Lisp_Object old_read_only
;
5243 ptrdiff_t old_begv
, old_zv
;
5244 ptrdiff_t old_begv_byte
, old_zv_byte
;
5245 ptrdiff_t before
, before_byte
;
5246 ptrdiff_t opoint_byte
;
5250 Fset_buffer (p
->buffer
);
5252 opoint_byte
= PT_BYTE
;
5253 old_read_only
= BVAR (current_buffer
, read_only
);
5256 old_begv_byte
= BEGV_BYTE
;
5257 old_zv_byte
= ZV_BYTE
;
5259 BVAR (current_buffer
, read_only
) = Qnil
;
5261 /* Insert new output into buffer
5262 at the current end-of-output marker,
5263 thus preserving logical ordering of input and output. */
5264 if (XMARKER (p
->mark
)->buffer
)
5265 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5266 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5269 SET_PT_BOTH (ZV
, ZV_BYTE
);
5271 before_byte
= PT_BYTE
;
5273 /* If the output marker is outside of the visible region, save
5274 the restriction and widen. */
5275 if (! (BEGV
<= PT
&& PT
<= ZV
))
5278 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5279 text
= coding
->dst_object
;
5280 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5281 /* A new coding system might be found. See the comment in the
5282 similar code in the previous `if' block. */
5283 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5285 p
->decode_coding_system
= Vlast_coding_system_used
;
5286 if (NILP (p
->encode_coding_system
)
5287 && proc_encode_coding_system
[p
->outfd
])
5289 p
->encode_coding_system
5290 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5291 setup_coding_system (p
->encode_coding_system
,
5292 proc_encode_coding_system
[p
->outfd
]);
5295 if (coding
->carryover_bytes
> 0)
5297 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5298 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5299 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5300 coding
->carryover_bytes
);
5301 p
->decoding_carryover
= coding
->carryover_bytes
;
5303 /* Adjust the multibyteness of TEXT to that of the buffer. */
5304 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5305 != ! STRING_MULTIBYTE (text
))
5306 text
= (STRING_MULTIBYTE (text
)
5307 ? Fstring_as_unibyte (text
)
5308 : Fstring_to_multibyte (text
));
5309 /* Insert before markers in case we are inserting where
5310 the buffer's mark is, and the user's next command is Meta-y. */
5311 insert_from_string_before_markers (text
, 0, 0,
5312 SCHARS (text
), SBYTES (text
), 0);
5314 /* Make sure the process marker's position is valid when the
5315 process buffer is changed in the signal_after_change above.
5316 W3 is known to do that. */
5317 if (BUFFERP (p
->buffer
)
5318 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5319 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5321 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5323 update_mode_lines
++;
5325 /* Make sure opoint and the old restrictions
5326 float ahead of any new text just as point would. */
5327 if (opoint
>= before
)
5329 opoint
+= PT
- before
;
5330 opoint_byte
+= PT_BYTE
- before_byte
;
5332 if (old_begv
> before
)
5334 old_begv
+= PT
- before
;
5335 old_begv_byte
+= PT_BYTE
- before_byte
;
5337 if (old_zv
>= before
)
5339 old_zv
+= PT
- before
;
5340 old_zv_byte
+= PT_BYTE
- before_byte
;
5343 /* If the restriction isn't what it should be, set it. */
5344 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5345 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5348 BVAR (current_buffer
, read_only
) = old_read_only
;
5349 SET_PT_BOTH (opoint
, opoint_byte
);
5351 /* Handling the process output should not deactivate the mark. */
5352 Vdeactivate_mark
= odeactivate
;
5354 unbind_to (count
, Qnil
);
5358 /* Sending data to subprocess */
5360 static jmp_buf send_process_frame
;
5361 static Lisp_Object process_sent_to
;
5363 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5364 static void send_process_trap (int) NO_RETURN
;
5368 send_process_trap (int ignore
)
5370 SIGNAL_THREAD_CHECK (SIGPIPE
);
5371 sigunblock (sigmask (SIGPIPE
));
5372 longjmp (send_process_frame
, 1);
5375 /* In send_process, when a write fails temporarily,
5376 wait_reading_process_output is called. It may execute user code,
5377 e.g. timers, that attempts to write new data to the same process.
5378 We must ensure that data is sent in the right order, and not
5379 interspersed half-completed with other writes (Bug#10815). This is
5380 handled by the write_queue element of struct process. It is a list
5381 with each entry having the form
5383 (string . (offset . length))
5385 where STRING is a lisp string, OFFSET is the offset into the
5386 string's byte sequence from which we should begin to send, and
5387 LENGTH is the number of bytes left to send. */
5389 /* Create a new entry in write_queue.
5390 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5391 BUF is a pointer to the string sequence of the input_obj or a C
5392 string in case of Qt or Qnil. */
5395 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5396 const char *buf
, ptrdiff_t len
, int front
)
5399 Lisp_Object entry
, obj
;
5401 if (STRINGP (input_obj
))
5403 offset
= buf
- SSDATA (input_obj
);
5409 obj
= make_unibyte_string (buf
, len
);
5412 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5415 p
->write_queue
= Fcons (entry
, p
->write_queue
);
5417 p
->write_queue
= nconc2 (p
->write_queue
, Fcons (entry
, Qnil
));
5420 /* Remove the first element in the write_queue of process P, put its
5421 contents in OBJ, BUF and LEN, and return non-zero. If the
5422 write_queue is empty, return zero. */
5425 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5426 const char **buf
, ptrdiff_t *len
)
5428 Lisp_Object entry
, offset_length
;
5431 if (NILP (p
->write_queue
))
5434 entry
= XCAR (p
->write_queue
);
5435 p
->write_queue
= XCDR (p
->write_queue
);
5437 *obj
= XCAR (entry
);
5438 offset_length
= XCDR (entry
);
5440 *len
= XINT (XCDR (offset_length
));
5441 offset
= XINT (XCAR (offset_length
));
5442 *buf
= SSDATA (*obj
) + offset
;
5447 /* Send some data to process PROC.
5448 BUF is the beginning of the data; LEN is the number of characters.
5449 OBJECT is the Lisp object that the data comes from. If OBJECT is
5450 nil or t, it means that the data comes from C string.
5452 If OBJECT is not nil, the data is encoded by PROC's coding-system
5453 for encoding before it is sent.
5455 This function can evaluate Lisp code and can garbage collect. */
5458 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5459 volatile ptrdiff_t len
, volatile Lisp_Object object
)
5461 /* Use volatile to protect variables from being clobbered by longjmp. */
5462 struct Lisp_Process
*p
= XPROCESS (proc
);
5464 struct coding_system
*coding
;
5465 void (*volatile old_sigpipe
) (int);
5467 if (p
->raw_status_new
)
5469 if (! EQ (p
->status
, Qrun
))
5470 error ("Process %s not running", SDATA (p
->name
));
5472 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5474 coding
= proc_encode_coding_system
[p
->outfd
];
5475 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5477 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5478 || (BUFFERP (object
)
5479 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5482 p
->encode_coding_system
5483 = complement_process_encoding_system (p
->encode_coding_system
);
5484 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5486 /* The coding system for encoding was changed to raw-text
5487 because we sent a unibyte text previously. Now we are
5488 sending a multibyte text, thus we must encode it by the
5489 original coding system specified for the current process.
5491 Another reason we come here is that the coding system
5492 was just complemented and a new one was returned by
5493 complement_process_encoding_system. */
5494 setup_coding_system (p
->encode_coding_system
, coding
);
5495 Vlast_coding_system_used
= p
->encode_coding_system
;
5497 coding
->src_multibyte
= 1;
5501 coding
->src_multibyte
= 0;
5502 /* For sending a unibyte text, character code conversion should
5503 not take place but EOL conversion should. So, setup raw-text
5504 or one of the subsidiary if we have not yet done it. */
5505 if (CODING_REQUIRE_ENCODING (coding
))
5507 if (CODING_REQUIRE_FLUSHING (coding
))
5509 /* But, before changing the coding, we must flush out data. */
5510 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5511 send_process (proc
, "", 0, Qt
);
5512 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5514 setup_coding_system (raw_text_coding_system
5515 (Vlast_coding_system_used
),
5517 coding
->src_multibyte
= 0;
5520 coding
->dst_multibyte
= 0;
5522 if (CODING_REQUIRE_ENCODING (coding
))
5524 coding
->dst_object
= Qt
;
5525 if (BUFFERP (object
))
5527 ptrdiff_t from_byte
, from
, to
;
5528 ptrdiff_t save_pt
, save_pt_byte
;
5529 struct buffer
*cur
= current_buffer
;
5531 set_buffer_internal (XBUFFER (object
));
5532 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5534 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5535 from
= BYTE_TO_CHAR (from_byte
);
5536 to
= BYTE_TO_CHAR (from_byte
+ len
);
5537 TEMP_SET_PT_BOTH (from
, from_byte
);
5538 encode_coding_object (coding
, object
, from
, from_byte
,
5539 to
, from_byte
+ len
, Qt
);
5540 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5541 set_buffer_internal (cur
);
5543 else if (STRINGP (object
))
5545 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5546 SBYTES (object
), Qt
);
5550 coding
->dst_object
= make_unibyte_string (buf
, len
);
5551 coding
->produced
= len
;
5554 len
= coding
->produced
;
5555 object
= coding
->dst_object
;
5556 buf
= SSDATA (object
);
5559 if (pty_max_bytes
== 0)
5561 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5562 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5563 if (pty_max_bytes
< 0)
5564 pty_max_bytes
= 250;
5566 pty_max_bytes
= 250;
5568 /* Deduct one, to leave space for the eof. */
5572 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5573 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5574 when returning with longjmp despite being declared volatile. */
5575 if (!setjmp (send_process_frame
))
5577 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5578 process_sent_to
= proc
;
5580 /* If there is already data in the write_queue, put the new data
5581 in the back of queue. Otherwise, ignore it. */
5582 if (!NILP (p
->write_queue
))
5583 write_queue_push (p
, object
, buf
, len
, 0);
5585 do /* while !NILP (p->write_queue) */
5587 ptrdiff_t cur_len
= -1;
5588 const char *cur_buf
;
5589 Lisp_Object cur_object
;
5591 /* If write_queue is empty, ignore it. */
5592 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5596 cur_object
= object
;
5601 /* Send this batch, using one or more write calls. */
5602 ptrdiff_t written
= 0;
5603 int outfd
= p
->outfd
;
5604 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5605 #ifdef DATAGRAM_SOCKETS
5606 if (DATAGRAM_CHAN_P (outfd
))
5608 rv
= sendto (outfd
, cur_buf
, cur_len
,
5609 0, datagram_address
[outfd
].sa
,
5610 datagram_address
[outfd
].len
);
5613 else if (errno
== EMSGSIZE
)
5615 signal (SIGPIPE
, old_sigpipe
);
5616 report_file_error ("sending datagram",
5617 Fcons (proc
, Qnil
));
5625 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5628 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5629 rv
= (written
? 0 : -1);
5630 #ifdef ADAPTIVE_READ_BUFFERING
5631 if (p
->read_output_delay
> 0
5632 && p
->adaptive_read_buffering
== 1)
5634 p
->read_output_delay
= 0;
5635 process_output_delay_count
--;
5636 p
->read_output_skip
= 0;
5640 signal (SIGPIPE
, old_sigpipe
);
5646 || errno
== EWOULDBLOCK
5652 /* Buffer is full. Wait, accepting input;
5653 that may allow the program
5654 to finish doing output and read more. */
5656 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5657 /* A gross hack to work around a bug in FreeBSD.
5658 In the following sequence, read(2) returns
5662 write(2) 954 bytes, get EAGAIN
5663 read(2) 1024 bytes in process_read_output
5664 read(2) 11 bytes in process_read_output
5666 That is, read(2) returns more bytes than have
5667 ever been written successfully. The 1033 bytes
5668 read are the 1022 bytes written successfully
5669 after processing (for example with CRs added if
5670 the terminal is set up that way which it is
5671 here). The same bytes will be seen again in a
5672 later read(2), without the CRs. */
5674 if (errno
== EAGAIN
)
5677 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5679 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5681 /* Put what we should have written in wait_queue. */
5682 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5683 #ifdef EMACS_HAS_USECS
5684 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5686 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5688 /* Reread queue, to see what is left. */
5692 /* This is a real error. */
5693 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5699 while (!NILP (p
->write_queue
));
5703 signal (SIGPIPE
, old_sigpipe
);
5704 proc
= process_sent_to
;
5705 p
= XPROCESS (proc
);
5706 p
->raw_status_new
= 0;
5707 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5708 p
->tick
= ++process_tick
;
5709 deactivate_process (proc
);
5710 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5714 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5716 doc
: /* Send current contents of region as input to PROCESS.
5717 PROCESS may be a process, a buffer, the name of a process or buffer, or
5718 nil, indicating the current buffer's process.
5719 Called from program, takes three arguments, PROCESS, START and END.
5720 If the region is more than 500 characters long,
5721 it is sent in several bunches. This may happen even for shorter regions.
5722 Output from processes can arrive in between bunches. */)
5723 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5726 ptrdiff_t start1
, end1
;
5728 proc
= get_process (process
);
5729 validate_region (&start
, &end
);
5731 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5732 move_gap (XINT (start
));
5734 start1
= CHAR_TO_BYTE (XINT (start
));
5735 end1
= CHAR_TO_BYTE (XINT (end
));
5736 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5737 Fcurrent_buffer ());
5742 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5744 doc
: /* Send PROCESS the contents of STRING as input.
5745 PROCESS may be a process, a buffer, the name of a process or buffer, or
5746 nil, indicating the current buffer's process.
5747 If STRING is more than 500 characters long,
5748 it is sent in several bunches. This may happen even for shorter strings.
5749 Output from processes can arrive in between bunches. */)
5750 (Lisp_Object process
, Lisp_Object string
)
5753 CHECK_STRING (string
);
5754 proc
= get_process (process
);
5755 send_process (proc
, SSDATA (string
),
5756 SBYTES (string
), string
);
5760 /* Return the foreground process group for the tty/pty that
5761 the process P uses. */
5763 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5768 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5771 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5772 master side. Try the slave side. */
5773 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5777 ioctl (fd
, TIOCGPGRP
, &gid
);
5781 #endif /* defined (TIOCGPGRP ) */
5786 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5787 Sprocess_running_child_p
, 0, 1, 0,
5788 doc
: /* Return t if PROCESS has given the terminal to a child.
5789 If the operating system does not make it possible to find out,
5790 return t unconditionally. */)
5791 (Lisp_Object process
)
5793 /* Initialize in case ioctl doesn't exist or gives an error,
5794 in a way that will cause returning t. */
5797 struct Lisp_Process
*p
;
5799 proc
= get_process (process
);
5800 p
= XPROCESS (proc
);
5802 if (!EQ (p
->type
, Qreal
))
5803 error ("Process %s is not a subprocess",
5806 error ("Process %s is not active",
5809 gid
= emacs_get_tty_pgrp (p
);
5816 /* send a signal number SIGNO to PROCESS.
5817 If CURRENT_GROUP is t, that means send to the process group
5818 that currently owns the terminal being used to communicate with PROCESS.
5819 This is used for various commands in shell mode.
5820 If CURRENT_GROUP is lambda, that means send to the process group
5821 that currently owns the terminal, but only if it is NOT the shell itself.
5823 If NOMSG is zero, insert signal-announcements into process's buffers
5826 If we can, we try to signal PROCESS by sending control characters
5827 down the pty. This allows us to signal inferiors who have changed
5828 their uid, for which killpg would return an EPERM error. */
5831 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5835 register struct Lisp_Process
*p
;
5839 proc
= get_process (process
);
5840 p
= XPROCESS (proc
);
5842 if (!EQ (p
->type
, Qreal
))
5843 error ("Process %s is not a subprocess",
5846 error ("Process %s is not active",
5850 current_group
= Qnil
;
5852 /* If we are using pgrps, get a pgrp number and make it negative. */
5853 if (NILP (current_group
))
5854 /* Send the signal to the shell's process group. */
5858 #ifdef SIGNALS_VIA_CHARACTERS
5859 /* If possible, send signals to the entire pgrp
5860 by sending an input character to it. */
5863 cc_t
*sig_char
= NULL
;
5865 tcgetattr (p
->infd
, &t
);
5870 sig_char
= &t
.c_cc
[VINTR
];
5874 sig_char
= &t
.c_cc
[VQUIT
];
5878 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5879 sig_char
= &t
.c_cc
[VSWTCH
];
5881 sig_char
= &t
.c_cc
[VSUSP
];
5886 if (sig_char
&& *sig_char
!= CDISABLE
)
5888 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5891 /* If we can't send the signal with a character,
5892 fall through and send it another way. */
5894 /* The code above may fall through if it can't
5895 handle the signal. */
5896 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5899 /* Get the current pgrp using the tty itself, if we have that.
5900 Otherwise, use the pty to get the pgrp.
5901 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5902 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5903 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5904 His patch indicates that if TIOCGPGRP returns an error, then
5905 we should just assume that p->pid is also the process group id. */
5907 gid
= emacs_get_tty_pgrp (p
);
5910 /* If we can't get the information, assume
5911 the shell owns the tty. */
5914 /* It is not clear whether anything really can set GID to -1.
5915 Perhaps on some system one of those ioctls can or could do so.
5916 Or perhaps this is vestigial. */
5919 #else /* ! defined (TIOCGPGRP ) */
5920 /* Can't select pgrps on this system, so we know that
5921 the child itself heads the pgrp. */
5923 #endif /* ! defined (TIOCGPGRP ) */
5925 /* If current_group is lambda, and the shell owns the terminal,
5926 don't send any signal. */
5927 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5935 p
->raw_status_new
= 0;
5937 p
->tick
= ++process_tick
;
5940 status_notify (NULL
);
5941 redisplay_preserve_echo_area (13);
5944 #endif /* ! defined (SIGCONT) */
5948 flush_pending_output (p
->infd
);
5952 /* If we don't have process groups, send the signal to the immediate
5953 subprocess. That isn't really right, but it's better than any
5954 obvious alternative. */
5957 kill (p
->pid
, signo
);
5961 /* gid may be a pid, or minus a pgrp's number */
5963 if (!NILP (current_group
))
5965 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5966 EMACS_KILLPG (gid
, signo
);
5973 #else /* ! defined (TIOCSIGSEND) */
5974 EMACS_KILLPG (gid
, signo
);
5975 #endif /* ! defined (TIOCSIGSEND) */
5978 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5979 doc
: /* Interrupt process PROCESS.
5980 PROCESS may be a process, a buffer, or the name of a process or buffer.
5981 No arg or nil means current buffer's process.
5982 Second arg CURRENT-GROUP non-nil means send signal to
5983 the current process-group of the process's controlling terminal
5984 rather than to the process's own process group.
5985 If the process is a shell, this means interrupt current subjob
5986 rather than the shell.
5988 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5989 don't send the signal. */)
5990 (Lisp_Object process
, Lisp_Object current_group
)
5992 process_send_signal (process
, SIGINT
, current_group
, 0);
5996 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5997 doc
: /* Kill process PROCESS. May be process or name of one.
5998 See function `interrupt-process' for more details on usage. */)
5999 (Lisp_Object process
, Lisp_Object current_group
)
6001 process_send_signal (process
, SIGKILL
, current_group
, 0);
6005 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6006 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6007 See function `interrupt-process' for more details on usage. */)
6008 (Lisp_Object process
, Lisp_Object current_group
)
6010 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6014 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6015 doc
: /* Stop process PROCESS. May be process or name of one.
6016 See function `interrupt-process' for more details on usage.
6017 If PROCESS is a network or serial process, inhibit handling of incoming
6019 (Lisp_Object process
, Lisp_Object current_group
)
6021 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6023 struct Lisp_Process
*p
;
6025 p
= XPROCESS (process
);
6026 if (NILP (p
->command
)
6029 FD_CLR (p
->infd
, &input_wait_mask
);
6030 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6036 error ("No SIGTSTP support");
6038 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6043 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6044 doc
: /* Continue process PROCESS. May be process or name of one.
6045 See function `interrupt-process' for more details on usage.
6046 If PROCESS is a network or serial process, resume handling of incoming
6048 (Lisp_Object process
, Lisp_Object current_group
)
6050 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6052 struct Lisp_Process
*p
;
6054 p
= XPROCESS (process
);
6055 if (EQ (p
->command
, Qt
)
6057 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6059 FD_SET (p
->infd
, &input_wait_mask
);
6060 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6062 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6063 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6064 #else /* not WINDOWSNT */
6065 tcflush (p
->infd
, TCIFLUSH
);
6066 #endif /* not WINDOWSNT */
6072 process_send_signal (process
, SIGCONT
, current_group
, 0);
6074 error ("No SIGCONT support");
6079 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6080 2, 2, "sProcess (name or number): \nnSignal code: ",
6081 doc
: /* Send PROCESS the signal with code SIGCODE.
6082 PROCESS may also be a number specifying the process id of the
6083 process to signal; in this case, the process need not be a child of
6085 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6086 (Lisp_Object process
, Lisp_Object sigcode
)
6090 if (STRINGP (process
))
6092 Lisp_Object tem
= Fget_process (process
);
6095 Lisp_Object process_number
=
6096 string_to_number (SSDATA (process
), 10, 1);
6097 if (INTEGERP (process_number
) || FLOATP (process_number
))
6098 tem
= process_number
;
6102 else if (!NUMBERP (process
))
6103 process
= get_process (process
);
6108 if (NUMBERP (process
))
6109 CONS_TO_INTEGER (process
, pid_t
, pid
);
6112 CHECK_PROCESS (process
);
6113 pid
= XPROCESS (process
)->pid
;
6115 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6118 #define parse_signal(NAME, VALUE) \
6119 else if (!xstrcasecmp (name, NAME)) \
6120 XSETINT (sigcode, VALUE)
6122 if (INTEGERP (sigcode
))
6123 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6128 CHECK_SYMBOL (sigcode
);
6129 name
= SSDATA (SYMBOL_NAME (sigcode
));
6131 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6137 parse_signal ("usr1", SIGUSR1
);
6140 parse_signal ("usr2", SIGUSR2
);
6143 parse_signal ("term", SIGTERM
);
6146 parse_signal ("hup", SIGHUP
);
6149 parse_signal ("int", SIGINT
);
6152 parse_signal ("quit", SIGQUIT
);
6155 parse_signal ("ill", SIGILL
);
6158 parse_signal ("abrt", SIGABRT
);
6161 parse_signal ("emt", SIGEMT
);
6164 parse_signal ("kill", SIGKILL
);
6167 parse_signal ("fpe", SIGFPE
);
6170 parse_signal ("bus", SIGBUS
);
6173 parse_signal ("segv", SIGSEGV
);
6176 parse_signal ("sys", SIGSYS
);
6179 parse_signal ("pipe", SIGPIPE
);
6182 parse_signal ("alrm", SIGALRM
);
6185 parse_signal ("urg", SIGURG
);
6188 parse_signal ("stop", SIGSTOP
);
6191 parse_signal ("tstp", SIGTSTP
);
6194 parse_signal ("cont", SIGCONT
);
6197 parse_signal ("chld", SIGCHLD
);
6200 parse_signal ("ttin", SIGTTIN
);
6203 parse_signal ("ttou", SIGTTOU
);
6206 parse_signal ("io", SIGIO
);
6209 parse_signal ("xcpu", SIGXCPU
);
6212 parse_signal ("xfsz", SIGXFSZ
);
6215 parse_signal ("vtalrm", SIGVTALRM
);
6218 parse_signal ("prof", SIGPROF
);
6221 parse_signal ("winch", SIGWINCH
);
6224 parse_signal ("info", SIGINFO
);
6227 error ("Undefined signal name %s", name
);
6232 return make_number (kill (pid
, XINT (sigcode
)));
6235 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6236 doc
: /* Make PROCESS see end-of-file in its input.
6237 EOF comes after any text already sent to it.
6238 PROCESS may be a process, a buffer, the name of a process or buffer, or
6239 nil, indicating the current buffer's process.
6240 If PROCESS is a network connection, or is a process communicating
6241 through a pipe (as opposed to a pty), then you cannot send any more
6242 text to PROCESS after you call this function.
6243 If PROCESS is a serial process, wait until all output written to the
6244 process has been transmitted to the serial port. */)
6245 (Lisp_Object process
)
6248 struct coding_system
*coding
;
6250 if (DATAGRAM_CONN_P (process
))
6253 proc
= get_process (process
);
6254 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6256 /* Make sure the process is really alive. */
6257 if (XPROCESS (proc
)->raw_status_new
)
6258 update_status (XPROCESS (proc
));
6259 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6260 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6262 if (CODING_REQUIRE_FLUSHING (coding
))
6264 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6265 send_process (proc
, "", 0, Qnil
);
6268 if (XPROCESS (proc
)->pty_flag
)
6269 send_process (proc
, "\004", 1, Qnil
);
6270 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6273 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6274 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6275 #endif /* not WINDOWSNT */
6276 /* Do nothing on Windows because writes are blocking. */
6280 int old_outfd
, new_outfd
;
6282 #ifdef HAVE_SHUTDOWN
6283 /* If this is a network connection, or socketpair is used
6284 for communication with the subprocess, call shutdown to cause EOF.
6285 (In some old system, shutdown to socketpair doesn't work.
6286 Then we just can't win.) */
6287 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6288 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6289 shutdown (XPROCESS (proc
)->outfd
, 1);
6290 /* In case of socketpair, outfd == infd, so don't close it. */
6291 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6292 emacs_close (XPROCESS (proc
)->outfd
);
6293 #else /* not HAVE_SHUTDOWN */
6294 emacs_close (XPROCESS (proc
)->outfd
);
6295 #endif /* not HAVE_SHUTDOWN */
6296 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6299 old_outfd
= XPROCESS (proc
)->outfd
;
6301 if (!proc_encode_coding_system
[new_outfd
])
6302 proc_encode_coding_system
[new_outfd
]
6303 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6304 memcpy (proc_encode_coding_system
[new_outfd
],
6305 proc_encode_coding_system
[old_outfd
],
6306 sizeof (struct coding_system
));
6307 memset (proc_encode_coding_system
[old_outfd
], 0,
6308 sizeof (struct coding_system
));
6310 XPROCESS (proc
)->outfd
= new_outfd
;
6315 /* On receipt of a signal that a child status has changed, loop asking
6316 about children with changed statuses until the system says there
6319 All we do is change the status; we do not run sentinels or print
6320 notifications. That is saved for the next time keyboard input is
6321 done, in order to avoid timing errors.
6323 ** WARNING: this can be called during garbage collection.
6324 Therefore, it must not be fooled by the presence of mark bits in
6327 ** USG WARNING: Although it is not obvious from the documentation
6328 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6329 signal() before executing at least one wait(), otherwise the
6330 handler will be called again, resulting in an infinite loop. The
6331 relevant portion of the documentation reads "SIGCLD signals will be
6332 queued and the signal-catching function will be continually
6333 reentered until the queue is empty". Invoking signal() causes the
6334 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6337 ** Malloc WARNING: This should never call malloc either directly or
6338 indirectly; if it does, that is a bug */
6342 sigchld_handler (int signo
)
6344 int old_errno
= errno
;
6346 struct Lisp_Process
*p
;
6348 SIGNAL_THREAD_CHECK (signo
);
6359 #endif /* no WUNTRACED */
6360 /* Keep trying to get a status until we get a definitive result. */
6364 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6366 while (pid
< 0 && errno
== EINTR
);
6370 /* PID == 0 means no processes found, PID == -1 means a real
6371 failure. We have done all our job, so return. */
6378 #endif /* no WNOHANG */
6380 /* Find the process that signaled us, and record its status. */
6382 /* The process can have been deleted by Fdelete_process. */
6383 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6385 Lisp_Object xpid
= XCAR (tail
);
6386 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6387 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6389 XSETCAR (tail
, Qnil
);
6390 goto sigchld_end_of_loop
;
6394 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6396 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6398 proc
= XCDR (XCAR (tail
));
6399 p
= XPROCESS (proc
);
6400 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6405 /* Look for an asynchronous process whose pid hasn't been filled
6408 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6410 proc
= XCDR (XCAR (tail
));
6411 p
= XPROCESS (proc
);
6417 /* Change the status of the process that was found. */
6420 int clear_desc_flag
= 0;
6422 p
->tick
= ++process_tick
;
6424 p
->raw_status_new
= 1;
6426 /* If process has terminated, stop waiting for its output. */
6427 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6429 clear_desc_flag
= 1;
6431 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6432 if (clear_desc_flag
)
6434 FD_CLR (p
->infd
, &input_wait_mask
);
6435 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6438 /* Tell wait_reading_process_output that it needs to wake up and
6440 if (input_available_clear_time
)
6441 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6444 /* There was no asynchronous process found for that pid: we have
6445 a synchronous process. */
6448 synch_process_alive
= 0;
6450 /* Report the status of the synchronous process. */
6452 synch_process_retcode
= WRETCODE (w
);
6453 else if (WIFSIGNALED (w
))
6454 synch_process_termsig
= WTERMSIG (w
);
6456 /* Tell wait_reading_process_output that it needs to wake up and
6458 if (input_available_clear_time
)
6459 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6462 sigchld_end_of_loop
:
6465 /* On some systems, we must return right away.
6466 If any more processes want to signal us, we will
6468 Otherwise (on systems that have WNOHANG), loop around
6469 to use up all the processes that have something to tell us. */
6470 #if (defined WINDOWSNT \
6471 || (defined USG && !defined GNU_LINUX \
6472 && !(defined HPUX && defined WNOHANG)))
6475 #endif /* USG, but not HPUX with WNOHANG */
6478 #endif /* SIGCHLD */
6482 exec_sentinel_unwind (Lisp_Object data
)
6484 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6489 exec_sentinel_error_handler (Lisp_Object error_val
)
6491 cmd_error_internal (error_val
, "error in process sentinel: ");
6493 update_echo_area ();
6494 Fsleep_for (make_number (2), Qnil
);
6499 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6501 Lisp_Object sentinel
, odeactivate
;
6502 register struct Lisp_Process
*p
= XPROCESS (proc
);
6503 ptrdiff_t count
= SPECPDL_INDEX ();
6504 int outer_running_asynch_code
= running_asynch_code
;
6505 int waiting
= waiting_for_user_input_p
;
6507 if (inhibit_sentinels
)
6510 /* No need to gcpro these, because all we do with them later
6511 is test them for EQness, and none of them should be a string. */
6512 odeactivate
= Vdeactivate_mark
;
6514 Lisp_Object obuffer
, okeymap
;
6515 XSETBUFFER (obuffer
, current_buffer
);
6516 okeymap
= BVAR (current_buffer
, keymap
);
6519 /* There's no good reason to let sentinels change the current
6520 buffer, and many callers of accept-process-output, sit-for, and
6521 friends don't expect current-buffer to be changed from under them. */
6522 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6524 sentinel
= p
->sentinel
;
6525 if (NILP (sentinel
))
6528 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6529 assure that it gets restored no matter how the sentinel exits. */
6531 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6532 /* Inhibit quit so that random quits don't screw up a running filter. */
6533 specbind (Qinhibit_quit
, Qt
);
6534 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6536 /* In case we get recursively called,
6537 and we already saved the match data nonrecursively,
6538 save the same match data in safely recursive fashion. */
6539 if (outer_running_asynch_code
)
6542 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6543 restore_search_regs ();
6544 record_unwind_save_match_data ();
6545 Fset_match_data (tem
, Qt
);
6548 /* For speed, if a search happens within this code,
6549 save the match data in a special nonrecursive fashion. */
6550 running_asynch_code
= 1;
6552 internal_condition_case_1 (read_process_output_call
,
6554 Fcons (proc
, Fcons (reason
, Qnil
))),
6555 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6556 exec_sentinel_error_handler
);
6558 /* If we saved the match data nonrecursively, restore it now. */
6559 restore_search_regs ();
6560 running_asynch_code
= outer_running_asynch_code
;
6562 Vdeactivate_mark
= odeactivate
;
6564 /* Restore waiting_for_user_input_p as it was
6565 when we were called, in case the filter clobbered it. */
6566 waiting_for_user_input_p
= waiting
;
6569 if (! EQ (Fcurrent_buffer (), obuffer
)
6570 || ! EQ (current_buffer
->keymap
, okeymap
))
6572 /* But do it only if the caller is actually going to read events.
6573 Otherwise there's no need to make him wake up, and it could
6574 cause trouble (for example it would make sit_for return). */
6575 if (waiting_for_user_input_p
== -1)
6576 record_asynch_buffer_change ();
6578 unbind_to (count
, Qnil
);
6581 /* Report all recent events of a change in process status
6582 (either run the sentinel or output a message).
6583 This is usually done while Emacs is waiting for keyboard input
6584 but can be done at other times. */
6587 status_notify (struct Lisp_Process
*deleting_process
)
6589 register Lisp_Object proc
, buffer
;
6590 Lisp_Object tail
, msg
;
6591 struct gcpro gcpro1
, gcpro2
;
6595 /* We need to gcpro tail; if read_process_output calls a filter
6596 which deletes a process and removes the cons to which tail points
6597 from Vprocess_alist, and then causes a GC, tail is an unprotected
6601 /* Set this now, so that if new processes are created by sentinels
6602 that we run, we get called again to handle their status changes. */
6603 update_tick
= process_tick
;
6605 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6608 register struct Lisp_Process
*p
;
6610 proc
= Fcdr (XCAR (tail
));
6611 p
= XPROCESS (proc
);
6613 if (p
->tick
!= p
->update_tick
)
6615 p
->update_tick
= p
->tick
;
6617 /* If process is still active, read any output that remains. */
6618 while (! EQ (p
->filter
, Qt
)
6619 && ! EQ (p
->status
, Qconnect
)
6620 && ! EQ (p
->status
, Qlisten
)
6621 /* Network or serial process not stopped: */
6622 && ! EQ (p
->command
, Qt
)
6624 && p
!= deleting_process
6625 && read_process_output (proc
, p
->infd
) > 0);
6629 /* Get the text to use for the message. */
6630 if (p
->raw_status_new
)
6632 msg
= status_message (p
);
6634 /* If process is terminated, deactivate it or delete it. */
6636 if (CONSP (p
->status
))
6637 symbol
= XCAR (p
->status
);
6639 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6640 || EQ (symbol
, Qclosed
))
6642 if (delete_exited_processes
)
6643 remove_process (proc
);
6645 deactivate_process (proc
);
6648 /* The actions above may have further incremented p->tick.
6649 So set p->update_tick again
6650 so that an error in the sentinel will not cause
6651 this code to be run again. */
6652 p
->update_tick
= p
->tick
;
6653 /* Now output the message suitably. */
6654 if (!NILP (p
->sentinel
))
6655 exec_sentinel (proc
, msg
);
6656 /* Don't bother with a message in the buffer
6657 when a process becomes runnable. */
6658 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6661 struct buffer
*old
= current_buffer
;
6662 ptrdiff_t opoint
, opoint_byte
;
6663 ptrdiff_t before
, before_byte
;
6665 /* Avoid error if buffer is deleted
6666 (probably that's why the process is dead, too) */
6667 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6669 Fset_buffer (buffer
);
6672 opoint_byte
= PT_BYTE
;
6673 /* Insert new output into buffer
6674 at the current end-of-output marker,
6675 thus preserving logical ordering of input and output. */
6676 if (XMARKER (p
->mark
)->buffer
)
6677 Fgoto_char (p
->mark
);
6679 SET_PT_BOTH (ZV
, ZV_BYTE
);
6682 before_byte
= PT_BYTE
;
6684 tem
= BVAR (current_buffer
, read_only
);
6685 BVAR (current_buffer
, read_only
) = Qnil
;
6686 insert_string ("\nProcess ");
6687 Finsert (1, &p
->name
);
6688 insert_string (" ");
6690 BVAR (current_buffer
, read_only
) = tem
;
6691 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6693 if (opoint
>= before
)
6694 SET_PT_BOTH (opoint
+ (PT
- before
),
6695 opoint_byte
+ (PT_BYTE
- before_byte
));
6697 SET_PT_BOTH (opoint
, opoint_byte
);
6699 set_buffer_internal (old
);
6704 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6709 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6710 Sset_process_coding_system
, 1, 3, 0,
6711 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6712 DECODING will be used to decode subprocess output and ENCODING to
6713 encode subprocess input. */)
6714 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6716 register struct Lisp_Process
*p
;
6718 CHECK_PROCESS (process
);
6719 p
= XPROCESS (process
);
6721 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6723 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6724 Fcheck_coding_system (decoding
);
6725 Fcheck_coding_system (encoding
);
6726 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6727 p
->decode_coding_system
= decoding
;
6728 p
->encode_coding_system
= encoding
;
6729 setup_process_coding_systems (process
);
6734 DEFUN ("process-coding-system",
6735 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6736 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6737 (register Lisp_Object process
)
6739 CHECK_PROCESS (process
);
6740 return Fcons (XPROCESS (process
)->decode_coding_system
,
6741 XPROCESS (process
)->encode_coding_system
);
6744 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6745 Sset_process_filter_multibyte
, 2, 2, 0,
6746 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6747 If FLAG is non-nil, the filter is given multibyte strings.
6748 If FLAG is nil, the filter is given unibyte strings. In this case,
6749 all character code conversion except for end-of-line conversion is
6751 (Lisp_Object process
, Lisp_Object flag
)
6753 register struct Lisp_Process
*p
;
6755 CHECK_PROCESS (process
);
6756 p
= XPROCESS (process
);
6758 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6759 setup_process_coding_systems (process
);
6764 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6765 Sprocess_filter_multibyte_p
, 1, 1, 0,
6766 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6767 (Lisp_Object process
)
6769 register struct Lisp_Process
*p
;
6770 struct coding_system
*coding
;
6772 CHECK_PROCESS (process
);
6773 p
= XPROCESS (process
);
6774 coding
= proc_decode_coding_system
[p
->infd
];
6775 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6784 add_gpm_wait_descriptor (int desc
)
6786 add_keyboard_wait_descriptor (desc
);
6790 delete_gpm_wait_descriptor (int desc
)
6792 delete_keyboard_wait_descriptor (desc
);
6799 /* Return nonzero if *MASK has a bit set
6800 that corresponds to one of the keyboard input descriptors. */
6803 keyboard_bit_set (fd_set
*mask
)
6807 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6808 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6809 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6816 #else /* not subprocesses */
6818 /* Defined on msdos.c. */
6819 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6822 /* Implementation of wait_reading_process_output, assuming that there
6823 are no subprocesses. Used only by the MS-DOS build.
6825 Wait for timeout to elapse and/or keyboard input to be available.
6828 timeout in seconds, or
6829 zero for no limit, or
6830 -1 means gobble data immediately available but don't wait for any.
6832 read_kbd is a Lisp_Object:
6833 0 to ignore keyboard input, or
6834 1 to return when input is available, or
6835 -1 means caller will actually read the input, so don't throw to
6838 see full version for other parameters. We know that wait_proc will
6839 always be NULL, since `subprocesses' isn't defined.
6841 do_display != 0 means redisplay should be done to show subprocess
6842 output that arrives.
6844 Return true if we received input from any process. */
6847 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6849 Lisp_Object wait_for_cell
,
6850 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6853 EMACS_TIME end_time
, timeout
;
6854 SELECT_TYPE waitchannels
;
6857 /* What does time_limit really mean? */
6858 if (time_limit
|| microsecs
)
6860 EMACS_GET_TIME (end_time
);
6861 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6862 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6865 /* Turn off periodic alarms (in case they are in use)
6866 and then turn off any other atimers,
6867 because the select emulator uses alarms. */
6869 turn_on_atimers (0);
6873 int timeout_reduced_for_timers
= 0;
6875 /* If calling from keyboard input, do not quit
6876 since we want to return C-g as an input character.
6877 Otherwise, do pending quit if requested. */
6881 /* Exit now if the cell we're waiting for became non-nil. */
6882 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6885 /* Compute time from now till when time limit is up */
6886 /* Exit if already run out */
6887 if (time_limit
== -1)
6889 /* -1 specified for timeout means
6890 gobble output available now
6891 but don't wait at all. */
6893 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6895 else if (time_limit
|| microsecs
)
6897 EMACS_GET_TIME (timeout
);
6898 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6899 if (EMACS_TIME_NEG_P (timeout
))
6904 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6907 /* If our caller will not immediately handle keyboard events,
6908 run timer events directly.
6909 (Callers that will immediately read keyboard events
6910 call timer_delay on their own.) */
6911 if (NILP (wait_for_cell
))
6913 EMACS_TIME timer_delay
;
6917 int old_timers_run
= timers_run
;
6918 timer_delay
= timer_check ();
6919 if (timers_run
!= old_timers_run
&& do_display
)
6920 /* We must retry, since a timer may have requeued itself
6921 and that could alter the time delay. */
6922 redisplay_preserve_echo_area (14);
6926 while (!detect_input_pending ());
6928 /* If there is unread keyboard input, also return. */
6930 && requeued_events_pending_p ())
6933 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6935 EMACS_TIME difference
;
6936 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6937 if (EMACS_TIME_NEG_P (difference
))
6939 timeout
= timer_delay
;
6940 timeout_reduced_for_timers
= 1;
6945 /* Cause C-g and alarm signals to take immediate action,
6946 and cause input available signals to zero out timeout. */
6948 set_waiting_for_input (&timeout
);
6950 /* Wait till there is something to do. */
6952 if (! read_kbd
&& NILP (wait_for_cell
))
6953 FD_ZERO (&waitchannels
);
6955 FD_SET (0, &waitchannels
);
6957 /* If a frame has been newly mapped and needs updating,
6958 reprocess its display stuff. */
6959 if (frame_garbaged
&& do_display
)
6961 clear_waiting_for_input ();
6962 redisplay_preserve_echo_area (15);
6964 set_waiting_for_input (&timeout
);
6967 if (read_kbd
&& detect_input_pending ())
6970 FD_ZERO (&waitchannels
);
6973 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6978 /* Make C-g and alarm signals set flags again */
6979 clear_waiting_for_input ();
6981 /* If we woke up due to SIGWINCH, actually change size now. */
6982 do_pending_window_change (0);
6984 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6985 /* We waited the full specified time, so return now. */
6990 /* If the system call was interrupted, then go around the
6992 if (xerrno
== EINTR
)
6993 FD_ZERO (&waitchannels
);
6995 error ("select error: %s", emacs_strerror (xerrno
));
6998 /* Check for keyboard input */
7001 && detect_input_pending_run_timers (do_display
))
7003 swallow_events (do_display
);
7004 if (detect_input_pending_run_timers (do_display
))
7008 /* If there is unread keyboard input, also return. */
7010 && requeued_events_pending_p ())
7013 /* If wait_for_cell. check for keyboard input
7014 but don't run any timers.
7015 ??? (It seems wrong to me to check for keyboard
7016 input at all when wait_for_cell, but the code
7017 has been this way since July 1994.
7018 Try changing this after version 19.31.) */
7019 if (! NILP (wait_for_cell
)
7020 && detect_input_pending ())
7022 swallow_events (do_display
);
7023 if (detect_input_pending ())
7027 /* Exit now if the cell we're waiting for became non-nil. */
7028 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7037 #endif /* not subprocesses */
7039 /* The following functions are needed even if async subprocesses are
7040 not supported. Some of them are no-op stubs in that case. */
7042 /* Add DESC to the set of keyboard input descriptors. */
7045 add_keyboard_wait_descriptor (int desc
)
7047 #ifdef subprocesses /* actually means "not MSDOS" */
7048 FD_SET (desc
, &input_wait_mask
);
7049 FD_SET (desc
, &non_process_wait_mask
);
7050 if (desc
> max_input_desc
)
7051 max_input_desc
= desc
;
7055 /* From now on, do not expect DESC to give keyboard input. */
7058 delete_keyboard_wait_descriptor (int desc
)
7062 int lim
= max_input_desc
;
7064 FD_CLR (desc
, &input_wait_mask
);
7065 FD_CLR (desc
, &non_process_wait_mask
);
7067 if (desc
== max_input_desc
)
7068 for (fd
= 0; fd
< lim
; fd
++)
7069 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7070 max_input_desc
= fd
;
7074 /* Setup coding systems of PROCESS. */
7077 setup_process_coding_systems (Lisp_Object process
)
7080 struct Lisp_Process
*p
= XPROCESS (process
);
7082 int outch
= p
->outfd
;
7083 Lisp_Object coding_system
;
7085 if (inch
< 0 || outch
< 0)
7088 if (!proc_decode_coding_system
[inch
])
7089 proc_decode_coding_system
[inch
]
7090 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7091 coding_system
= p
->decode_coding_system
;
7092 if (! NILP (p
->filter
))
7094 else if (BUFFERP (p
->buffer
))
7096 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7097 coding_system
= raw_text_coding_system (coding_system
);
7099 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7101 if (!proc_encode_coding_system
[outch
])
7102 proc_encode_coding_system
[outch
]
7103 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7104 setup_coding_system (p
->encode_coding_system
,
7105 proc_encode_coding_system
[outch
]);
7109 /* Close all descriptors currently in use for communication
7110 with subprocess. This is used in a newly-forked subprocess
7111 to get rid of irrelevant descriptors. */
7114 close_process_descs (void)
7118 for (i
= 0; i
< MAXDESC
; i
++)
7120 Lisp_Object process
;
7121 process
= chan_process
[i
];
7122 if (!NILP (process
))
7124 int in
= XPROCESS (process
)->infd
;
7125 int out
= XPROCESS (process
)->outfd
;
7128 if (out
>= 0 && in
!= out
)
7135 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7136 doc
: /* Return the (or a) process associated with BUFFER.
7137 BUFFER may be a buffer or the name of one. */)
7138 (register Lisp_Object buffer
)
7141 register Lisp_Object buf
, tail
, proc
;
7143 if (NILP (buffer
)) return Qnil
;
7144 buf
= Fget_buffer (buffer
);
7145 if (NILP (buf
)) return Qnil
;
7147 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7149 proc
= Fcdr (XCAR (tail
));
7150 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7153 #endif /* subprocesses */
7157 DEFUN ("process-inherit-coding-system-flag",
7158 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7160 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7161 If this flag is t, `buffer-file-coding-system' of the buffer
7162 associated with PROCESS will inherit the coding system used to decode
7163 the process output. */)
7164 (register Lisp_Object process
)
7167 CHECK_PROCESS (process
);
7168 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7170 /* Ignore the argument and return the value of
7171 inherit-process-coding-system. */
7172 return inherit_process_coding_system
? Qt
: Qnil
;
7176 /* Kill all processes associated with `buffer'.
7177 If `buffer' is nil, kill all processes */
7180 kill_buffer_processes (Lisp_Object buffer
)
7183 Lisp_Object tail
, proc
;
7185 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7187 proc
= XCDR (XCAR (tail
));
7189 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7191 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7192 Fdelete_process (proc
);
7193 else if (XPROCESS (proc
)->infd
>= 0)
7194 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7197 #else /* subprocesses */
7198 /* Since we have no subprocesses, this does nothing. */
7199 #endif /* subprocesses */
7202 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7203 Swaiting_for_user_input_p
, 0, 0, 0,
7204 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7205 This is intended for use by asynchronous process output filters and sentinels. */)
7209 return (waiting_for_user_input_p
? Qt
: Qnil
);
7215 /* Stop reading input from keyboard sources. */
7218 hold_keyboard_input (void)
7223 /* Resume reading input from keyboard sources. */
7226 unhold_keyboard_input (void)
7231 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7234 kbd_on_hold_p (void)
7236 return kbd_is_on_hold
;
7240 /* Enumeration of and access to system processes a-la ps(1). */
7242 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7244 doc
: /* Return a list of numerical process IDs of all running processes.
7245 If this functionality is unsupported, return nil.
7247 See `process-attributes' for getting attributes of a process given its ID. */)
7250 return list_system_processes ();
7253 DEFUN ("process-attributes", Fprocess_attributes
,
7254 Sprocess_attributes
, 1, 1, 0,
7255 doc
: /* Return attributes of the process given by its PID, a number.
7257 Value is an alist where each element is a cons cell of the form
7261 If this functionality is unsupported, the value is nil.
7263 See `list-system-processes' for getting a list of all process IDs.
7265 The KEYs of the attributes that this function may return are listed
7266 below, together with the type of the associated VALUE (in parentheses).
7267 Not all platforms support all of these attributes; unsupported
7268 attributes will not appear in the returned alist.
7269 Unless explicitly indicated otherwise, numbers can have either
7270 integer or floating point values.
7272 euid -- Effective user User ID of the process (number)
7273 user -- User name corresponding to euid (string)
7274 egid -- Effective user Group ID of the process (number)
7275 group -- Group name corresponding to egid (string)
7276 comm -- Command name (executable name only) (string)
7277 state -- Process state code, such as "S", "R", or "T" (string)
7278 ppid -- Parent process ID (number)
7279 pgrp -- Process group ID (number)
7280 sess -- Session ID, i.e. process ID of session leader (number)
7281 ttname -- Controlling tty name (string)
7282 tpgid -- ID of foreground process group on the process's tty (number)
7283 minflt -- number of minor page faults (number)
7284 majflt -- number of major page faults (number)
7285 cminflt -- cumulative number of minor page faults (number)
7286 cmajflt -- cumulative number of major page faults (number)
7287 utime -- user time used by the process, in the (HIGH LOW USEC) format
7288 stime -- system time used by the process, in the (HIGH LOW USEC) format
7289 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7290 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7291 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7292 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7293 pri -- priority of the process (number)
7294 nice -- nice value of the process (number)
7295 thcount -- process thread count (number)
7296 start -- time the process started, in the (HIGH LOW USEC) format
7297 vsize -- virtual memory size of the process in KB's (number)
7298 rss -- resident set size of the process in KB's (number)
7299 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7300 pcpu -- percents of CPU time used by the process (floating-point number)
7301 pmem -- percents of total physical memory used by process's resident set
7302 (floating-point number)
7303 args -- command line which invoked the process (string). */)
7306 return system_process_attributes (pid
);
7316 inhibit_sentinels
= 0;
7320 if (! noninteractive
|| initialized
)
7322 signal (SIGCHLD
, sigchld_handler
);
7325 FD_ZERO (&input_wait_mask
);
7326 FD_ZERO (&non_keyboard_wait_mask
);
7327 FD_ZERO (&non_process_wait_mask
);
7328 FD_ZERO (&write_mask
);
7329 max_process_desc
= 0;
7330 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7332 #ifdef NON_BLOCKING_CONNECT
7333 FD_ZERO (&connect_wait_mask
);
7334 num_pending_connects
= 0;
7337 #ifdef ADAPTIVE_READ_BUFFERING
7338 process_output_delay_count
= 0;
7339 process_output_skip
= 0;
7342 /* Don't do this, it caused infinite select loops. The display
7343 method should call add_keyboard_wait_descriptor on stdin if it
7346 FD_SET (0, &input_wait_mask
);
7349 Vprocess_alist
= Qnil
;
7351 deleted_pid_list
= Qnil
;
7353 for (i
= 0; i
< MAXDESC
; i
++)
7355 chan_process
[i
] = Qnil
;
7356 proc_buffered_char
[i
] = -1;
7358 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7359 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7360 #ifdef DATAGRAM_SOCKETS
7361 memset (datagram_address
, 0, sizeof datagram_address
);
7365 Lisp_Object subfeatures
= Qnil
;
7366 const struct socket_options
*sopt
;
7368 #define ADD_SUBFEATURE(key, val) \
7369 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7371 #ifdef NON_BLOCKING_CONNECT
7372 ADD_SUBFEATURE (QCnowait
, Qt
);
7374 #ifdef DATAGRAM_SOCKETS
7375 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7377 #ifdef HAVE_SEQPACKET
7378 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7380 #ifdef HAVE_LOCAL_SOCKETS
7381 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7383 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7385 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7387 #ifdef HAVE_GETSOCKNAME
7388 ADD_SUBFEATURE (QCservice
, Qt
);
7390 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7391 ADD_SUBFEATURE (QCserver
, Qt
);
7394 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7395 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7397 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7400 #if defined (DARWIN_OS)
7401 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7402 processes. As such, we only change the default value. */
7405 char const *release
= (STRINGP (Voperating_system_release
)
7406 ? SSDATA (Voperating_system_release
)
7408 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7409 && release
[1] == '.')) {
7410 Vprocess_connection_type
= Qnil
;
7414 #endif /* subprocesses */
7419 syms_of_process (void)
7423 DEFSYM (Qprocessp
, "processp");
7424 DEFSYM (Qrun
, "run");
7425 DEFSYM (Qstop
, "stop");
7426 DEFSYM (Qsignal
, "signal");
7428 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7431 Qexit = intern_c_string ("exit");
7432 staticpro (&Qexit); */
7434 DEFSYM (Qopen
, "open");
7435 DEFSYM (Qclosed
, "closed");
7436 DEFSYM (Qconnect
, "connect");
7437 DEFSYM (Qfailed
, "failed");
7438 DEFSYM (Qlisten
, "listen");
7439 DEFSYM (Qlocal
, "local");
7440 DEFSYM (Qipv4
, "ipv4");
7442 DEFSYM (Qipv6
, "ipv6");
7444 DEFSYM (Qdatagram
, "datagram");
7445 DEFSYM (Qseqpacket
, "seqpacket");
7447 DEFSYM (QCport
, ":port");
7448 DEFSYM (QCspeed
, ":speed");
7449 DEFSYM (QCprocess
, ":process");
7451 DEFSYM (QCbytesize
, ":bytesize");
7452 DEFSYM (QCstopbits
, ":stopbits");
7453 DEFSYM (QCparity
, ":parity");
7454 DEFSYM (Qodd
, "odd");
7455 DEFSYM (Qeven
, "even");
7456 DEFSYM (QCflowcontrol
, ":flowcontrol");
7459 DEFSYM (QCsummary
, ":summary");
7461 DEFSYM (Qreal
, "real");
7462 DEFSYM (Qnetwork
, "network");
7463 DEFSYM (Qserial
, "serial");
7464 DEFSYM (QCbuffer
, ":buffer");
7465 DEFSYM (QChost
, ":host");
7466 DEFSYM (QCservice
, ":service");
7467 DEFSYM (QClocal
, ":local");
7468 DEFSYM (QCremote
, ":remote");
7469 DEFSYM (QCcoding
, ":coding");
7470 DEFSYM (QCserver
, ":server");
7471 DEFSYM (QCnowait
, ":nowait");
7472 DEFSYM (QCsentinel
, ":sentinel");
7473 DEFSYM (QClog
, ":log");
7474 DEFSYM (QCnoquery
, ":noquery");
7475 DEFSYM (QCstop
, ":stop");
7476 DEFSYM (QCoptions
, ":options");
7477 DEFSYM (QCplist
, ":plist");
7479 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7481 staticpro (&Vprocess_alist
);
7483 staticpro (&deleted_pid_list
);
7486 #endif /* subprocesses */
7488 DEFSYM (QCname
, ":name");
7489 DEFSYM (QCtype
, ":type");
7491 DEFSYM (Qeuid
, "euid");
7492 DEFSYM (Qegid
, "egid");
7493 DEFSYM (Quser
, "user");
7494 DEFSYM (Qgroup
, "group");
7495 DEFSYM (Qcomm
, "comm");
7496 DEFSYM (Qstate
, "state");
7497 DEFSYM (Qppid
, "ppid");
7498 DEFSYM (Qpgrp
, "pgrp");
7499 DEFSYM (Qsess
, "sess");
7500 DEFSYM (Qttname
, "ttname");
7501 DEFSYM (Qtpgid
, "tpgid");
7502 DEFSYM (Qminflt
, "minflt");
7503 DEFSYM (Qmajflt
, "majflt");
7504 DEFSYM (Qcminflt
, "cminflt");
7505 DEFSYM (Qcmajflt
, "cmajflt");
7506 DEFSYM (Qutime
, "utime");
7507 DEFSYM (Qstime
, "stime");
7508 DEFSYM (Qtime
, "time");
7509 DEFSYM (Qcutime
, "cutime");
7510 DEFSYM (Qcstime
, "cstime");
7511 DEFSYM (Qctime
, "ctime");
7512 DEFSYM (Qpri
, "pri");
7513 DEFSYM (Qnice
, "nice");
7514 DEFSYM (Qthcount
, "thcount");
7515 DEFSYM (Qstart
, "start");
7516 DEFSYM (Qvsize
, "vsize");
7517 DEFSYM (Qrss
, "rss");
7518 DEFSYM (Qetime
, "etime");
7519 DEFSYM (Qpcpu
, "pcpu");
7520 DEFSYM (Qpmem
, "pmem");
7521 DEFSYM (Qargs
, "args");
7523 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7524 doc
: /* Non-nil means delete processes immediately when they exit.
7525 A value of nil means don't delete them until `list-processes' is run. */);
7527 delete_exited_processes
= 1;
7530 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7531 doc
: /* Control type of device used to communicate with subprocesses.
7532 Values are nil to use a pipe, or t or `pty' to use a pty.
7533 The value has no effect if the system has no ptys or if all ptys are busy:
7534 then a pipe is used in any case.
7535 The value takes effect when `start-process' is called. */);
7536 Vprocess_connection_type
= Qt
;
7538 #ifdef ADAPTIVE_READ_BUFFERING
7539 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7540 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7541 On some systems, when Emacs reads the output from a subprocess, the output data
7542 is read in very small blocks, potentially resulting in very poor performance.
7543 This behavior can be remedied to some extent by setting this variable to a
7544 non-nil value, as it will automatically delay reading from such processes, to
7545 allow them to produce more output before Emacs tries to read it.
7546 If the value is t, the delay is reset after each write to the process; any other
7547 non-nil value means that the delay is not reset on write.
7548 The variable takes effect when `start-process' is called. */);
7549 Vprocess_adaptive_read_buffering
= Qt
;
7552 defsubr (&Sprocessp
);
7553 defsubr (&Sget_process
);
7554 defsubr (&Sdelete_process
);
7555 defsubr (&Sprocess_status
);
7556 defsubr (&Sprocess_exit_status
);
7557 defsubr (&Sprocess_id
);
7558 defsubr (&Sprocess_name
);
7559 defsubr (&Sprocess_tty_name
);
7560 defsubr (&Sprocess_command
);
7561 defsubr (&Sset_process_buffer
);
7562 defsubr (&Sprocess_buffer
);
7563 defsubr (&Sprocess_mark
);
7564 defsubr (&Sset_process_filter
);
7565 defsubr (&Sprocess_filter
);
7566 defsubr (&Sset_process_sentinel
);
7567 defsubr (&Sprocess_sentinel
);
7568 defsubr (&Sset_process_window_size
);
7569 defsubr (&Sset_process_inherit_coding_system_flag
);
7570 defsubr (&Sset_process_query_on_exit_flag
);
7571 defsubr (&Sprocess_query_on_exit_flag
);
7572 defsubr (&Sprocess_contact
);
7573 defsubr (&Sprocess_plist
);
7574 defsubr (&Sset_process_plist
);
7575 defsubr (&Sprocess_list
);
7576 defsubr (&Sstart_process
);
7577 defsubr (&Sserial_process_configure
);
7578 defsubr (&Smake_serial_process
);
7579 defsubr (&Sset_network_process_option
);
7580 defsubr (&Smake_network_process
);
7581 defsubr (&Sformat_network_address
);
7582 #if defined (HAVE_NET_IF_H)
7584 defsubr (&Snetwork_interface_list
);
7586 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7587 defsubr (&Snetwork_interface_info
);
7589 #endif /* defined (HAVE_NET_IF_H) */
7590 #ifdef DATAGRAM_SOCKETS
7591 defsubr (&Sprocess_datagram_address
);
7592 defsubr (&Sset_process_datagram_address
);
7594 defsubr (&Saccept_process_output
);
7595 defsubr (&Sprocess_send_region
);
7596 defsubr (&Sprocess_send_string
);
7597 defsubr (&Sinterrupt_process
);
7598 defsubr (&Skill_process
);
7599 defsubr (&Squit_process
);
7600 defsubr (&Sstop_process
);
7601 defsubr (&Scontinue_process
);
7602 defsubr (&Sprocess_running_child_p
);
7603 defsubr (&Sprocess_send_eof
);
7604 defsubr (&Ssignal_process
);
7605 defsubr (&Swaiting_for_user_input_p
);
7606 defsubr (&Sprocess_type
);
7607 defsubr (&Sset_process_coding_system
);
7608 defsubr (&Sprocess_coding_system
);
7609 defsubr (&Sset_process_filter_multibyte
);
7610 defsubr (&Sprocess_filter_multibyte_p
);
7612 #endif /* subprocesses */
7614 defsubr (&Sget_buffer_process
);
7615 defsubr (&Sprocess_inherit_coding_system_flag
);
7616 defsubr (&Slist_system_processes
);
7617 defsubr (&Sprocess_attributes
);