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 */
97 #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;
642 #ifdef ADAPTIVE_READ_BUFFERING
643 p
->adaptive_read_buffering
= 0;
644 p
->read_output_delay
= 0;
645 p
->read_output_skip
= 0;
649 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
650 /* Default log level. */
651 p
->gnutls_log_level
= 0;
652 /* GnuTLS handshakes attempted for this connection. */
653 p
->gnutls_handshakes_tried
= 0;
655 p
->gnutls_state
= NULL
;
656 p
->gnutls_x509_cred
= NULL
;
657 p
->gnutls_anon_cred
= NULL
;
660 /* If name is already in use, modify it until it is unused. */
665 tem
= Fget_process (name1
);
666 if (NILP (tem
)) break;
667 sprintf (suffix
, "<%"pMd
">", i
);
668 name1
= concat2 (name
, build_string (suffix
));
672 XSETPROCESS (val
, p
);
673 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
678 remove_process (register Lisp_Object proc
)
680 register Lisp_Object pair
;
682 pair
= Frassq (proc
, Vprocess_alist
);
683 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
685 deactivate_process (proc
);
689 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
690 doc
: /* Return t if OBJECT is a process. */)
693 return PROCESSP (object
) ? Qt
: Qnil
;
696 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
697 doc
: /* Return the process named NAME, or nil if there is none. */)
698 (register Lisp_Object name
)
703 return Fcdr (Fassoc (name
, Vprocess_alist
));
706 /* This is how commands for the user decode process arguments. It
707 accepts a process, a process name, a buffer, a buffer name, or nil.
708 Buffers denote the first process in the buffer, and nil denotes the
712 get_process (register Lisp_Object name
)
714 register Lisp_Object proc
, obj
;
717 obj
= Fget_process (name
);
719 obj
= Fget_buffer (name
);
721 error ("Process %s does not exist", SDATA (name
));
723 else if (NILP (name
))
724 obj
= Fcurrent_buffer ();
728 /* Now obj should be either a buffer object or a process object.
732 proc
= Fget_buffer_process (obj
);
734 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
746 /* Fdelete_process promises to immediately forget about the process, but in
747 reality, Emacs needs to remember those processes until they have been
748 treated by sigchld_handler; otherwise this handler would consider the
749 process as being synchronous and say that the synchronous process is
751 static Lisp_Object deleted_pid_list
;
754 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
755 doc
: /* Delete PROCESS: kill it and forget about it immediately.
756 PROCESS may be a process, a buffer, the name of a process or buffer, or
757 nil, indicating the current buffer's process. */)
758 (register Lisp_Object process
)
760 register struct Lisp_Process
*p
;
762 process
= get_process (process
);
763 p
= XPROCESS (process
);
765 p
->raw_status_new
= 0;
766 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
768 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
769 p
->tick
= ++process_tick
;
771 redisplay_preserve_echo_area (13);
773 else if (p
->infd
>= 0)
779 /* No problem storing the pid here, as it is still in Vprocess_alist. */
780 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
781 /* GC treated elements set to nil. */
782 Fdelq (Qnil
, deleted_pid_list
));
783 /* If the process has already signaled, remove it from the list. */
784 if (p
->raw_status_new
)
787 if (CONSP (p
->status
))
788 symbol
= XCAR (p
->status
);
789 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
791 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
795 Fkill_process (process
, Qnil
);
796 /* Do this now, since remove_process will make sigchld_handler do nothing. */
798 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
799 p
->tick
= ++process_tick
;
801 redisplay_preserve_echo_area (13);
804 remove_process (process
);
808 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
809 doc
: /* Return the status of PROCESS.
810 The returned value is one of the following symbols:
811 run -- for a process that is running.
812 stop -- for a process stopped but continuable.
813 exit -- for a process that has exited.
814 signal -- for a process that has got a fatal signal.
815 open -- for a network stream connection that is open.
816 listen -- for a network stream server that is listening.
817 closed -- for a network stream connection that is closed.
818 connect -- when waiting for a non-blocking connection to complete.
819 failed -- when a non-blocking connection has failed.
820 nil -- if arg is a process name and no such process exists.
821 PROCESS may be a process, a buffer, the name of a process, or
822 nil, indicating the current buffer's process. */)
823 (register Lisp_Object process
)
825 register struct Lisp_Process
*p
;
826 register Lisp_Object status
;
828 if (STRINGP (process
))
829 process
= Fget_process (process
);
831 process
= get_process (process
);
836 p
= XPROCESS (process
);
837 if (p
->raw_status_new
)
841 status
= XCAR (status
);
842 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
844 if (EQ (status
, Qexit
))
846 else if (EQ (p
->command
, Qt
))
848 else if (EQ (status
, Qrun
))
854 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
856 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
857 If PROCESS has not yet exited or died, return 0. */)
858 (register Lisp_Object process
)
860 CHECK_PROCESS (process
);
861 if (XPROCESS (process
)->raw_status_new
)
862 update_status (XPROCESS (process
));
863 if (CONSP (XPROCESS (process
)->status
))
864 return XCAR (XCDR (XPROCESS (process
)->status
));
865 return make_number (0);
868 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
869 doc
: /* Return the process id of PROCESS.
870 This is the pid of the external process which PROCESS uses or talks to.
871 For a network connection, this value is nil. */)
872 (register Lisp_Object process
)
876 CHECK_PROCESS (process
);
877 pid
= XPROCESS (process
)->pid
;
878 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
881 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
882 doc
: /* Return the name of PROCESS, as a string.
883 This is the name of the program invoked in PROCESS,
884 possibly modified to make it unique among process names. */)
885 (register Lisp_Object process
)
887 CHECK_PROCESS (process
);
888 return XPROCESS (process
)->name
;
891 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
892 doc
: /* Return the command that was executed to start PROCESS.
893 This is a list of strings, the first string being the program executed
894 and the rest of the strings being the arguments given to it.
895 For a network or serial process, this is nil (process is running) or t
896 \(process is stopped). */)
897 (register Lisp_Object process
)
899 CHECK_PROCESS (process
);
900 return XPROCESS (process
)->command
;
903 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
904 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
905 This is the terminal that the process itself reads and writes on,
906 not the name of the pty that Emacs uses to talk with that terminal. */)
907 (register Lisp_Object process
)
909 CHECK_PROCESS (process
);
910 return XPROCESS (process
)->tty_name
;
913 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
915 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
917 (register Lisp_Object process
, Lisp_Object buffer
)
919 struct Lisp_Process
*p
;
921 CHECK_PROCESS (process
);
923 CHECK_BUFFER (buffer
);
924 p
= XPROCESS (process
);
926 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
927 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
928 setup_process_coding_systems (process
);
932 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
934 doc
: /* Return the buffer PROCESS is associated with.
935 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
936 (register Lisp_Object process
)
938 CHECK_PROCESS (process
);
939 return XPROCESS (process
)->buffer
;
942 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
944 doc
: /* Return the marker for the end of the last output from PROCESS. */)
945 (register Lisp_Object process
)
947 CHECK_PROCESS (process
);
948 return XPROCESS (process
)->mark
;
951 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
953 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
954 A value of t means stop accepting output from the process.
956 When a process has a filter, its buffer is not used for output.
957 Instead, each time it does output, the entire string of output is
958 passed to the filter.
960 The filter gets two arguments: the process and the string of output.
961 The string argument is normally a multibyte string, except:
962 - if the process' input coding system is no-conversion or raw-text,
963 it is a unibyte string (the non-converted input), or else
964 - if `default-enable-multibyte-characters' is nil, it is a unibyte
965 string (the result of converting the decoded input multibyte
966 string to unibyte with `string-make-unibyte'). */)
967 (register Lisp_Object process
, Lisp_Object filter
)
969 struct Lisp_Process
*p
;
971 CHECK_PROCESS (process
);
972 p
= XPROCESS (process
);
974 /* Don't signal an error if the process' input file descriptor
975 is closed. This could make debugging Lisp more difficult,
976 for example when doing something like
978 (setq process (start-process ...))
980 (set-process-filter process ...) */
984 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
986 FD_CLR (p
->infd
, &input_wait_mask
);
987 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
989 else if (EQ (p
->filter
, Qt
)
990 /* Network or serial process not stopped: */
991 && !EQ (p
->command
, Qt
))
993 FD_SET (p
->infd
, &input_wait_mask
);
994 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
999 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1000 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1001 setup_process_coding_systems (process
);
1005 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1007 doc
: /* Returns the filter function of PROCESS; nil if none.
1008 See `set-process-filter' for more info on filter functions. */)
1009 (register Lisp_Object process
)
1011 CHECK_PROCESS (process
);
1012 return XPROCESS (process
)->filter
;
1015 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1017 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1018 The sentinel is called as a function when the process changes state.
1019 It gets two arguments: the process, and a string describing the change. */)
1020 (register Lisp_Object process
, Lisp_Object sentinel
)
1022 struct Lisp_Process
*p
;
1024 CHECK_PROCESS (process
);
1025 p
= XPROCESS (process
);
1027 p
->sentinel
= sentinel
;
1028 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1029 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1033 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1035 doc
: /* Return the sentinel of PROCESS; nil if none.
1036 See `set-process-sentinel' for more info on sentinels. */)
1037 (register Lisp_Object process
)
1039 CHECK_PROCESS (process
);
1040 return XPROCESS (process
)->sentinel
;
1043 DEFUN ("set-process-window-size", Fset_process_window_size
,
1044 Sset_process_window_size
, 3, 3, 0,
1045 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1046 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1048 CHECK_PROCESS (process
);
1049 CHECK_RANGED_INTEGER (0, height
, INT_MAX
);
1050 CHECK_RANGED_INTEGER (0, width
, INT_MAX
);
1052 if (XPROCESS (process
)->infd
< 0
1053 || set_window_size (XPROCESS (process
)->infd
,
1054 XINT (height
), XINT (width
)) <= 0)
1060 DEFUN ("set-process-inherit-coding-system-flag",
1061 Fset_process_inherit_coding_system_flag
,
1062 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1063 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1064 If the second argument FLAG is non-nil, then the variable
1065 `buffer-file-coding-system' of the buffer associated with PROCESS
1066 will be bound to the value of the coding system used to decode
1069 This is useful when the coding system specified for the process buffer
1070 leaves either the character code conversion or the end-of-line conversion
1071 unspecified, or if the coding system used to decode the process output
1072 is more appropriate for saving the process buffer.
1074 Binding the variable `inherit-process-coding-system' to non-nil before
1075 starting the process is an alternative way of setting the inherit flag
1076 for the process which will run.
1078 This function returns FLAG. */)
1079 (register Lisp_Object process
, Lisp_Object flag
)
1081 CHECK_PROCESS (process
);
1082 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1086 DEFUN ("set-process-query-on-exit-flag",
1087 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1089 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1090 If the second argument FLAG is non-nil, Emacs will query the user before
1091 exiting or killing a buffer if PROCESS is running. This function
1093 (register Lisp_Object process
, Lisp_Object flag
)
1095 CHECK_PROCESS (process
);
1096 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1100 DEFUN ("process-query-on-exit-flag",
1101 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1103 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1104 (register Lisp_Object process
)
1106 CHECK_PROCESS (process
);
1107 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1110 #ifdef DATAGRAM_SOCKETS
1111 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1114 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1116 doc
: /* Return the contact info of PROCESS; t for a real child.
1117 For a network or serial connection, the value depends on the optional
1118 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1119 SERVICE) for a network connection or (PORT SPEED) for a serial
1120 connection. If KEY is t, the complete contact information for the
1121 connection is returned, else the specific value for the keyword KEY is
1122 returned. See `make-network-process' or `make-serial-process' for a
1123 list of keywords. */)
1124 (register Lisp_Object process
, Lisp_Object key
)
1126 Lisp_Object contact
;
1128 CHECK_PROCESS (process
);
1129 contact
= XPROCESS (process
)->childp
;
1131 #ifdef DATAGRAM_SOCKETS
1132 if (DATAGRAM_CONN_P (process
)
1133 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1134 contact
= Fplist_put (contact
, QCremote
,
1135 Fprocess_datagram_address (process
));
1138 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1140 if (NILP (key
) && NETCONN_P (process
))
1141 return Fcons (Fplist_get (contact
, QChost
),
1142 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1143 if (NILP (key
) && SERIALCONN_P (process
))
1144 return Fcons (Fplist_get (contact
, QCport
),
1145 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1146 return Fplist_get (contact
, key
);
1149 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1151 doc
: /* Return the plist of PROCESS. */)
1152 (register Lisp_Object process
)
1154 CHECK_PROCESS (process
);
1155 return XPROCESS (process
)->plist
;
1158 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1160 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1161 (register Lisp_Object process
, Lisp_Object plist
)
1163 CHECK_PROCESS (process
);
1166 XPROCESS (process
)->plist
= plist
;
1170 #if 0 /* Turned off because we don't currently record this info
1171 in the process. Perhaps add it. */
1172 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1173 doc
: /* Return the connection type of PROCESS.
1174 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1175 a socket connection. */)
1176 (Lisp_Object process
)
1178 return XPROCESS (process
)->type
;
1182 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1183 doc
: /* Return the connection type of PROCESS.
1184 The value is either the symbol `real', `network', or `serial'.
1185 PROCESS may be a process, a buffer, the name of a process or buffer, or
1186 nil, indicating the current buffer's process. */)
1187 (Lisp_Object process
)
1190 proc
= get_process (process
);
1191 return XPROCESS (proc
)->type
;
1194 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1196 doc
: /* Convert network ADDRESS from internal format to a string.
1197 A 4 or 5 element vector represents an IPv4 address (with port number).
1198 An 8 or 9 element vector represents an IPv6 address (with port number).
1199 If optional second argument OMIT-PORT is non-nil, don't include a port
1200 number in the string, even when present in ADDRESS.
1201 Returns nil if format of ADDRESS is invalid. */)
1202 (Lisp_Object address
, Lisp_Object omit_port
)
1207 if (STRINGP (address
)) /* AF_LOCAL */
1210 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1212 register struct Lisp_Vector
*p
= XVECTOR (address
);
1213 ptrdiff_t size
= p
->header
.size
;
1214 Lisp_Object args
[10];
1217 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1219 args
[0] = build_string ("%d.%d.%d.%d");
1224 args
[0] = build_string ("%d.%d.%d.%d:%d");
1227 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1229 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1234 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1240 for (i
= 0; i
< nargs
; i
++)
1242 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1245 if (nargs
<= 5 /* IPv4 */
1246 && i
< 4 /* host, not port */
1247 && XINT (p
->contents
[i
]) > 255)
1250 args
[i
+1] = p
->contents
[i
];
1253 return Fformat (nargs
+1, args
);
1256 if (CONSP (address
))
1258 Lisp_Object args
[2];
1259 args
[0] = build_string ("<Family %d>");
1260 args
[1] = Fcar (address
);
1261 return Fformat (2, args
);
1267 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1268 doc
: /* Return a list of all processes. */)
1271 return Fmapcar (Qcdr
, Vprocess_alist
);
1274 /* Starting asynchronous inferior processes. */
1276 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1278 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1279 doc
: /* Start a program in a subprocess. Return the process object for it.
1280 NAME is name for process. It is modified if necessary to make it unique.
1281 BUFFER is the buffer (or buffer name) to associate with the process.
1283 Process output (both standard output and standard error streams) goes
1284 at end of BUFFER, unless you specify an output stream or filter
1285 function to handle the output. BUFFER may also be nil, meaning that
1286 this process is not associated with any buffer.
1288 PROGRAM is the program file name. It is searched for in `exec-path'
1289 (which see). If nil, just associate a pty with the buffer. Remaining
1290 arguments are strings to give program as arguments.
1292 If you want to separate standard output from standard error, invoke
1293 the command through a shell and redirect one of them using the shell
1296 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1297 (ptrdiff_t nargs
, Lisp_Object
*args
)
1299 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1300 register unsigned char **new_argv
;
1302 ptrdiff_t count
= SPECPDL_INDEX ();
1306 buffer
= Fget_buffer_create (buffer
);
1308 /* Make sure that the child will be able to chdir to the current
1309 buffer's current directory, or its unhandled equivalent. We
1310 can't just have the child check for an error when it does the
1311 chdir, since it's in a vfork.
1313 We have to GCPRO around this because Fexpand_file_name and
1314 Funhandled_file_name_directory might call a file name handling
1315 function. The argument list is protected by the caller, so all
1316 we really have to worry about is buffer. */
1318 struct gcpro gcpro1
, gcpro2
;
1320 current_dir
= BVAR (current_buffer
, directory
);
1322 GCPRO2 (buffer
, current_dir
);
1324 current_dir
= Funhandled_file_name_directory (current_dir
);
1325 if (NILP (current_dir
))
1326 /* If the file name handler says that current_dir is unreachable, use
1327 a sensible default. */
1328 current_dir
= build_string ("~/");
1329 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1330 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1331 report_file_error ("Setting current directory",
1332 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1338 CHECK_STRING (name
);
1342 if (!NILP (program
))
1343 CHECK_STRING (program
);
1345 proc
= make_process (name
);
1346 /* If an error occurs and we can't start the process, we want to
1347 remove it from the process list. This means that each error
1348 check in create_process doesn't need to call remove_process
1349 itself; it's all taken care of here. */
1350 record_unwind_protect (start_process_unwind
, proc
);
1352 XPROCESS (proc
)->childp
= Qt
;
1353 XPROCESS (proc
)->plist
= Qnil
;
1354 XPROCESS (proc
)->type
= Qreal
;
1355 XPROCESS (proc
)->buffer
= buffer
;
1356 XPROCESS (proc
)->sentinel
= Qnil
;
1357 XPROCESS (proc
)->filter
= Qnil
;
1358 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1361 /* AKA GNUTLS_INITSTAGE(proc). */
1362 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1363 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1366 #ifdef ADAPTIVE_READ_BUFFERING
1367 XPROCESS (proc
)->adaptive_read_buffering
1368 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1369 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1372 /* Make the process marker point into the process buffer (if any). */
1373 if (BUFFERP (buffer
))
1374 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1375 BUF_ZV (XBUFFER (buffer
)),
1376 BUF_ZV_BYTE (XBUFFER (buffer
)));
1379 /* Decide coding systems for communicating with the process. Here
1380 we don't setup the structure coding_system nor pay attention to
1381 unibyte mode. They are done in create_process. */
1383 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1384 Lisp_Object coding_systems
= Qt
;
1385 Lisp_Object val
, *args2
;
1386 struct gcpro gcpro1
, gcpro2
;
1388 val
= Vcoding_system_for_read
;
1391 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1392 args2
[0] = Qstart_process
;
1393 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1394 GCPRO2 (proc
, current_dir
);
1395 if (!NILP (program
))
1396 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1398 if (CONSP (coding_systems
))
1399 val
= XCAR (coding_systems
);
1400 else if (CONSP (Vdefault_process_coding_system
))
1401 val
= XCAR (Vdefault_process_coding_system
);
1403 XPROCESS (proc
)->decode_coding_system
= val
;
1405 val
= Vcoding_system_for_write
;
1408 if (EQ (coding_systems
, Qt
))
1410 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1411 args2
[0] = Qstart_process
;
1412 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1413 GCPRO2 (proc
, current_dir
);
1414 if (!NILP (program
))
1415 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1418 if (CONSP (coding_systems
))
1419 val
= XCDR (coding_systems
);
1420 else if (CONSP (Vdefault_process_coding_system
))
1421 val
= XCDR (Vdefault_process_coding_system
);
1423 XPROCESS (proc
)->encode_coding_system
= val
;
1424 /* Note: At this moment, the above coding system may leave
1425 text-conversion or eol-conversion unspecified. They will be
1426 decided after we read output from the process and decode it by
1427 some coding system, or just before we actually send a text to
1432 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1433 XPROCESS (proc
)->decoding_carryover
= 0;
1434 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1436 XPROCESS (proc
)->inherit_coding_system_flag
1437 = !(NILP (buffer
) || !inherit_process_coding_system
);
1439 if (!NILP (program
))
1441 /* If program file name is not absolute, search our path for it.
1442 Put the name we will really use in TEM. */
1443 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1444 && !(SCHARS (program
) > 1
1445 && IS_DEVICE_SEP (SREF (program
, 1))))
1447 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1450 GCPRO4 (name
, program
, buffer
, current_dir
);
1451 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1454 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1455 tem
= Fexpand_file_name (tem
, Qnil
);
1459 if (!NILP (Ffile_directory_p (program
)))
1460 error ("Specified program for new process is a directory");
1464 /* If program file name starts with /: for quoting a magic name,
1466 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1467 && SREF (tem
, 1) == ':')
1468 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1471 Lisp_Object arg_encoding
= Qnil
;
1472 struct gcpro gcpro1
;
1475 /* Encode the file name and put it in NEW_ARGV.
1476 That's where the child will use it to execute the program. */
1477 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1479 /* Here we encode arguments by the coding system used for sending
1480 data to the process. We don't support using different coding
1481 systems for encoding arguments and for encoding data sent to the
1484 for (i
= 3; i
< nargs
; i
++)
1486 tem
= Fcons (args
[i
], tem
);
1487 CHECK_STRING (XCAR (tem
));
1488 if (STRING_MULTIBYTE (XCAR (tem
)))
1490 if (NILP (arg_encoding
))
1491 arg_encoding
= (complement_process_encoding_system
1492 (XPROCESS (proc
)->encode_coding_system
));
1494 code_convert_string_norecord
1495 (XCAR (tem
), arg_encoding
, 1));
1502 /* Now that everything is encoded we can collect the strings into
1504 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1505 new_argv
[nargs
- 2] = 0;
1507 for (i
= nargs
- 2; i
-- != 0; )
1509 new_argv
[i
] = SDATA (XCAR (tem
));
1513 create_process (proc
, (char **) new_argv
, current_dir
);
1518 return unbind_to (count
, proc
);
1521 /* This function is the unwind_protect form for Fstart_process. If
1522 PROC doesn't have its pid set, then we know someone has signaled
1523 an error and the process wasn't started successfully, so we should
1524 remove it from the process list. */
1526 start_process_unwind (Lisp_Object proc
)
1528 if (!PROCESSP (proc
))
1531 /* Was PROC started successfully?
1532 -2 is used for a pty with no process, eg for gdb. */
1533 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1534 remove_process (proc
);
1540 create_process_1 (struct atimer
*timer
)
1542 /* Nothing to do. */
1547 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1549 int inchannel
, outchannel
;
1552 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1553 int wait_child_setup
[2];
1557 struct sigaction sigint_action
;
1558 struct sigaction sigquit_action
;
1559 struct sigaction sigpipe_action
;
1561 struct sigaction sighup_action
;
1563 /* Use volatile to protect variables from being clobbered by longjmp. */
1564 volatile int forkin
, forkout
;
1565 volatile int pty_flag
= 0;
1567 extern char **environ
;
1570 inchannel
= outchannel
= -1;
1573 if (!NILP (Vprocess_connection_type
))
1574 outchannel
= inchannel
= allocate_pty ();
1578 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1579 /* On most USG systems it does not work to open the pty's tty here,
1580 then close it and reopen it in the child. */
1582 /* Don't let this terminal become our controlling terminal
1583 (in case we don't have one). */
1584 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1586 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1589 report_file_error ("Opening pty", Qnil
);
1591 forkin
= forkout
= -1;
1592 #endif /* not USG, or USG_SUBTTY_WORKS */
1596 #endif /* HAVE_PTYS */
1601 report_file_error ("Creating pipe", Qnil
);
1607 emacs_close (inchannel
);
1608 emacs_close (forkout
);
1609 report_file_error ("Creating pipe", Qnil
);
1615 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1619 tem
= pipe (wait_child_setup
);
1621 report_file_error ("Creating pipe", Qnil
);
1622 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1624 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1627 emacs_close (wait_child_setup
[0]);
1628 emacs_close (wait_child_setup
[1]);
1629 report_file_error ("Setting file descriptor flags", Qnil
);
1635 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1636 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1639 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1640 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1644 /* Record this as an active process, with its channels.
1645 As a result, child_setup will close Emacs's side of the pipes. */
1646 chan_process
[inchannel
] = process
;
1647 XPROCESS (process
)->infd
= inchannel
;
1648 XPROCESS (process
)->outfd
= outchannel
;
1650 /* Previously we recorded the tty descriptor used in the subprocess.
1651 It was only used for getting the foreground tty process, so now
1652 we just reopen the device (see emacs_get_tty_pgrp) as this is
1653 more portable (see USG_SUBTTY_WORKS above). */
1655 XPROCESS (process
)->pty_flag
= pty_flag
;
1656 XPROCESS (process
)->status
= Qrun
;
1658 /* Delay interrupts until we have a chance to store
1659 the new fork's pid in its process structure */
1660 sigemptyset (&blocked
);
1662 sigaddset (&blocked
, SIGCHLD
);
1664 #ifdef HAVE_WORKING_VFORK
1665 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1666 this sets the parent's signal handlers as well as the child's.
1667 So delay all interrupts whose handlers the child might munge,
1668 and record the current handlers so they can be restored later. */
1669 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1670 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1671 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1673 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1675 #endif /* HAVE_WORKING_VFORK */
1676 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1678 FD_SET (inchannel
, &input_wait_mask
);
1679 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1680 if (inchannel
> max_process_desc
)
1681 max_process_desc
= inchannel
;
1683 /* Until we store the proper pid, enable sigchld_handler
1684 to recognize an unknown pid as standing for this process.
1685 It is very important not to let this `marker' value stay
1686 in the table after this function has returned; if it does
1687 it might cause call-process to hang and subsequent asynchronous
1688 processes to get their return values scrambled. */
1689 XPROCESS (process
)->pid
= -1;
1691 /* This must be called after the above line because it may signal an
1693 setup_process_coding_systems (process
);
1698 /* child_setup must clobber environ on systems with true vfork.
1699 Protect it from permanent change. */
1700 char **save_environ
= environ
;
1701 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1706 #endif /* not WINDOWSNT */
1708 int xforkin
= forkin
;
1709 int xforkout
= forkout
;
1711 #if 0 /* This was probably a mistake--it duplicates code later on,
1712 but fails to handle all the cases. */
1713 /* Make sure SIGCHLD is not blocked in the child. */
1714 sigsetmask (SIGEMPTYMASK
);
1717 /* Make the pty be the controlling terminal of the process. */
1719 /* First, disconnect its current controlling terminal. */
1721 /* We tried doing setsid only if pty_flag, but it caused
1722 process_set_signal to fail on SGI when using a pipe. */
1724 /* Make the pty's terminal the controlling terminal. */
1725 if (pty_flag
&& xforkin
>= 0)
1728 /* We ignore the return value
1729 because faith@cs.unc.edu says that is necessary on Linux. */
1730 ioctl (xforkin
, TIOCSCTTY
, 0);
1733 #else /* not HAVE_SETSID */
1735 /* It's very important to call setpgrp here and no time
1736 afterwards. Otherwise, we lose our controlling tty which
1737 is set when we open the pty. */
1740 #endif /* not HAVE_SETSID */
1741 #if defined (LDISC1)
1742 if (pty_flag
&& xforkin
>= 0)
1745 tcgetattr (xforkin
, &t
);
1747 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1748 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1751 #if defined (NTTYDISC) && defined (TIOCSETD)
1752 if (pty_flag
&& xforkin
>= 0)
1754 /* Use new line discipline. */
1755 int ldisc
= NTTYDISC
;
1756 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1761 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1762 can do TIOCSPGRP only to the process's controlling tty. */
1765 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1766 I can't test it since I don't have 4.3. */
1767 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1770 ioctl (j
, TIOCNOTTY
, 0);
1774 /* In order to get a controlling terminal on some versions
1775 of BSD, it is necessary to put the process in pgrp 0
1776 before it opens the terminal. */
1784 #endif /* TIOCNOTTY */
1786 #if !defined (DONT_REOPEN_PTY)
1787 /*** There is a suggestion that this ought to be a
1788 conditional on TIOCSPGRP,
1789 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1790 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1791 that system does seem to need this code, even though
1792 both HAVE_SETSID and TIOCSCTTY are defined. */
1793 /* Now close the pty (if we had it open) and reopen it.
1794 This makes the pty the controlling terminal of the subprocess. */
1798 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1801 emacs_close (xforkin
);
1802 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1806 emacs_write (1, "Couldn't open the pty terminal ", 31);
1807 emacs_write (1, pty_name
, strlen (pty_name
));
1808 emacs_write (1, "\n", 1);
1813 #endif /* not DONT_REOPEN_PTY */
1815 #ifdef SETUP_SLAVE_PTY
1820 #endif /* SETUP_SLAVE_PTY */
1822 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1823 Now reenable it in the child, so it will die when we want it to. */
1825 signal (SIGHUP
, SIG_DFL
);
1827 #endif /* HAVE_PTYS */
1829 signal (SIGINT
, SIG_DFL
);
1830 signal (SIGQUIT
, SIG_DFL
);
1831 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1833 signal (SIGPIPE
, SIG_DFL
);
1835 /* Stop blocking signals in the child. */
1836 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1839 child_setup_tty (xforkout
);
1841 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1842 new_argv
, 1, encoded_current_dir
);
1843 #else /* not WINDOWSNT */
1845 emacs_close (wait_child_setup
[0]);
1847 child_setup (xforkin
, xforkout
, xforkout
,
1848 new_argv
, 1, encoded_current_dir
);
1849 #endif /* not WINDOWSNT */
1851 environ
= save_environ
;
1856 /* This runs in the Emacs process. */
1860 emacs_close (forkin
);
1861 if (forkin
!= forkout
&& forkout
>= 0)
1862 emacs_close (forkout
);
1866 /* vfork succeeded. */
1867 XPROCESS (process
)->pid
= pid
;
1870 register_child (pid
, inchannel
);
1871 #endif /* WINDOWSNT */
1873 /* If the subfork execv fails, and it exits,
1874 this close hangs. I don't know why.
1875 So have an interrupt jar it loose. */
1877 struct atimer
*timer
;
1881 EMACS_SET_SECS_USECS (offset
, 1, 0);
1882 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1885 emacs_close (forkin
);
1887 cancel_atimer (timer
);
1891 if (forkin
!= forkout
&& forkout
>= 0)
1892 emacs_close (forkout
);
1896 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1899 XPROCESS (process
)->tty_name
= Qnil
;
1901 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1902 /* Wait for child_setup to complete in case that vfork is
1903 actually defined as fork. The descriptor wait_child_setup[1]
1904 of a pipe is closed at the child side either by close-on-exec
1905 on successful execvp or the _exit call in child_setup. */
1909 emacs_close (wait_child_setup
[1]);
1910 emacs_read (wait_child_setup
[0], &dummy
, 1);
1911 emacs_close (wait_child_setup
[0]);
1916 /* Restore the signal state whether vfork succeeded or not.
1917 (We will signal an error, below, if it failed.) */
1918 #ifdef HAVE_WORKING_VFORK
1919 /* Restore the parent's signal handlers. */
1920 sigaction (SIGINT
, &sigint_action
, 0);
1921 sigaction (SIGQUIT
, &sigquit_action
, 0);
1922 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1924 sigaction (SIGHUP
, &sighup_action
, 0);
1926 #endif /* HAVE_WORKING_VFORK */
1927 /* Stop blocking signals in the parent. */
1928 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1930 /* Now generate the error if vfork failed. */
1932 report_file_error ("Doing vfork", Qnil
);
1936 create_pty (Lisp_Object process
)
1938 int inchannel
, outchannel
;
1941 inchannel
= outchannel
= -1;
1944 if (!NILP (Vprocess_connection_type
))
1945 outchannel
= inchannel
= allocate_pty ();
1949 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1950 /* On most USG systems it does not work to open the pty's tty here,
1951 then close it and reopen it in the child. */
1953 /* Don't let this terminal become our controlling terminal
1954 (in case we don't have one). */
1955 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1957 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1960 report_file_error ("Opening pty", Qnil
);
1961 #if defined (DONT_REOPEN_PTY)
1962 /* In the case that vfork is defined as fork, the parent process
1963 (Emacs) may send some data before the child process completes
1964 tty options setup. So we setup tty before forking. */
1965 child_setup_tty (forkout
);
1966 #endif /* DONT_REOPEN_PTY */
1967 #endif /* not USG, or USG_SUBTTY_WORKS */
1970 #endif /* HAVE_PTYS */
1973 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1974 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1977 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1978 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1982 /* Record this as an active process, with its channels.
1983 As a result, child_setup will close Emacs's side of the pipes. */
1984 chan_process
[inchannel
] = process
;
1985 XPROCESS (process
)->infd
= inchannel
;
1986 XPROCESS (process
)->outfd
= outchannel
;
1988 /* Previously we recorded the tty descriptor used in the subprocess.
1989 It was only used for getting the foreground tty process, so now
1990 we just reopen the device (see emacs_get_tty_pgrp) as this is
1991 more portable (see USG_SUBTTY_WORKS above). */
1993 XPROCESS (process
)->pty_flag
= pty_flag
;
1994 XPROCESS (process
)->status
= Qrun
;
1995 setup_process_coding_systems (process
);
1997 FD_SET (inchannel
, &input_wait_mask
);
1998 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1999 if (inchannel
> max_process_desc
)
2000 max_process_desc
= inchannel
;
2002 XPROCESS (process
)->pid
= -2;
2005 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2008 XPROCESS (process
)->tty_name
= Qnil
;
2012 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2013 The address family of sa is not included in the result. */
2016 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2018 Lisp_Object address
;
2021 register struct Lisp_Vector
*p
;
2023 /* Workaround for a bug in getsockname on BSD: Names bound to
2024 sockets in the UNIX domain are inaccessible; getsockname returns
2025 a zero length name. */
2026 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2027 return empty_unibyte_string
;
2029 switch (sa
->sa_family
)
2033 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2034 len
= sizeof (sin
->sin_addr
) + 1;
2035 address
= Fmake_vector (make_number (len
), Qnil
);
2036 p
= XVECTOR (address
);
2037 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2038 cp
= (unsigned char *) &sin
->sin_addr
;
2044 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2045 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2046 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2047 address
= Fmake_vector (make_number (len
), Qnil
);
2048 p
= XVECTOR (address
);
2049 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2050 for (i
= 0; i
< len
; i
++)
2051 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2055 #ifdef HAVE_LOCAL_SOCKETS
2058 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2059 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2060 if (sockun
->sun_path
[i
] == 0)
2062 return make_unibyte_string (sockun
->sun_path
, i
);
2066 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2067 address
= Fcons (make_number (sa
->sa_family
),
2068 Fmake_vector (make_number (len
), Qnil
));
2069 p
= XVECTOR (XCDR (address
));
2070 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2076 p
->contents
[i
++] = make_number (*cp
++);
2082 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2085 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2087 register struct Lisp_Vector
*p
;
2089 if (VECTORP (address
))
2091 p
= XVECTOR (address
);
2092 if (p
->header
.size
== 5)
2095 return sizeof (struct sockaddr_in
);
2098 else if (p
->header
.size
== 9)
2100 *familyp
= AF_INET6
;
2101 return sizeof (struct sockaddr_in6
);
2105 #ifdef HAVE_LOCAL_SOCKETS
2106 else if (STRINGP (address
))
2108 *familyp
= AF_LOCAL
;
2109 return sizeof (struct sockaddr_un
);
2112 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2113 && VECTORP (XCDR (address
)))
2115 struct sockaddr
*sa
;
2116 *familyp
= XINT (XCAR (address
));
2117 p
= XVECTOR (XCDR (address
));
2118 return p
->header
.size
+ sizeof (sa
->sa_family
);
2123 /* Convert an address object (vector or string) to an internal sockaddr.
2125 The address format has been basically validated by
2126 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2127 it could have come from user data. So if FAMILY is not valid,
2128 we return after zeroing *SA. */
2131 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2133 register struct Lisp_Vector
*p
;
2134 register unsigned char *cp
= NULL
;
2138 memset (sa
, 0, len
);
2140 if (VECTORP (address
))
2142 p
= XVECTOR (address
);
2143 if (family
== AF_INET
)
2145 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2146 len
= sizeof (sin
->sin_addr
) + 1;
2147 hostport
= XINT (p
->contents
[--len
]);
2148 sin
->sin_port
= htons (hostport
);
2149 cp
= (unsigned char *)&sin
->sin_addr
;
2150 sa
->sa_family
= family
;
2153 else if (family
== AF_INET6
)
2155 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2156 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2157 len
= sizeof (sin6
->sin6_addr
) + 1;
2158 hostport
= XINT (p
->contents
[--len
]);
2159 sin6
->sin6_port
= htons (hostport
);
2160 for (i
= 0; i
< len
; i
++)
2161 if (INTEGERP (p
->contents
[i
]))
2163 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2166 sa
->sa_family
= family
;
2173 else if (STRINGP (address
))
2175 #ifdef HAVE_LOCAL_SOCKETS
2176 if (family
== AF_LOCAL
)
2178 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2179 cp
= SDATA (address
);
2180 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2181 sockun
->sun_path
[i
] = *cp
++;
2182 sa
->sa_family
= family
;
2189 p
= XVECTOR (XCDR (address
));
2190 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2193 for (i
= 0; i
< len
; i
++)
2194 if (INTEGERP (p
->contents
[i
]))
2195 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2198 #ifdef DATAGRAM_SOCKETS
2199 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2201 doc
: /* Get the current datagram address associated with PROCESS. */)
2202 (Lisp_Object process
)
2206 CHECK_PROCESS (process
);
2208 if (!DATAGRAM_CONN_P (process
))
2211 channel
= XPROCESS (process
)->infd
;
2212 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2213 datagram_address
[channel
].len
);
2216 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2218 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2219 Returns nil upon error setting address, ADDRESS otherwise. */)
2220 (Lisp_Object process
, Lisp_Object address
)
2225 CHECK_PROCESS (process
);
2227 if (!DATAGRAM_CONN_P (process
))
2230 channel
= XPROCESS (process
)->infd
;
2232 len
= get_lisp_to_sockaddr_size (address
, &family
);
2233 if (datagram_address
[channel
].len
!= len
)
2235 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2241 static const struct socket_options
{
2242 /* The name of this option. Should be lowercase version of option
2243 name without SO_ prefix. */
2245 /* Option level SOL_... */
2247 /* Option number SO_... */
2249 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2250 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2251 } socket_options
[] =
2253 #ifdef SO_BINDTODEVICE
2254 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2257 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2260 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2263 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2266 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2269 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2272 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2275 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2277 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2280 /* Set option OPT to value VAL on socket S.
2282 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2283 Signals an error if setting a known option fails.
2287 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2290 const struct socket_options
*sopt
;
2295 name
= SSDATA (SYMBOL_NAME (opt
));
2296 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2297 if (strcmp (name
, sopt
->name
) == 0)
2300 switch (sopt
->opttype
)
2305 optval
= NILP (val
) ? 0 : 1;
2306 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2307 &optval
, sizeof (optval
));
2314 if (TYPE_RANGED_INTEGERP (int, val
))
2315 optval
= XINT (val
);
2317 error ("Bad option value for %s", name
);
2318 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2319 &optval
, sizeof (optval
));
2323 #ifdef SO_BINDTODEVICE
2326 char devname
[IFNAMSIZ
+1];
2328 /* This is broken, at least in the Linux 2.4 kernel.
2329 To unbind, the arg must be a zero integer, not the empty string.
2330 This should work on all systems. KFS. 2003-09-23. */
2331 memset (devname
, 0, sizeof devname
);
2334 char *arg
= SSDATA (val
);
2335 int len
= min (strlen (arg
), IFNAMSIZ
);
2336 memcpy (devname
, arg
, len
);
2338 else if (!NILP (val
))
2339 error ("Bad option value for %s", name
);
2340 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2349 struct linger linger
;
2352 linger
.l_linger
= 0;
2353 if (TYPE_RANGED_INTEGERP (int, val
))
2354 linger
.l_linger
= XINT (val
);
2356 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2357 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2358 &linger
, sizeof (linger
));
2368 report_file_error ("Cannot set network option",
2369 Fcons (opt
, Fcons (val
, Qnil
)));
2370 return (1 << sopt
->optbit
);
2374 DEFUN ("set-network-process-option",
2375 Fset_network_process_option
, Sset_network_process_option
,
2377 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2378 See `make-network-process' for a list of options and values.
2379 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2380 OPTION is not a supported option, return nil instead; otherwise return t. */)
2381 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2384 struct Lisp_Process
*p
;
2386 CHECK_PROCESS (process
);
2387 p
= XPROCESS (process
);
2388 if (!NETCONN1_P (p
))
2389 error ("Process is not a network process");
2393 error ("Process is not running");
2395 if (set_socket_option (s
, option
, value
))
2397 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2401 if (NILP (no_error
))
2402 error ("Unknown or unsupported option");
2408 DEFUN ("serial-process-configure",
2409 Fserial_process_configure
,
2410 Sserial_process_configure
,
2412 doc
: /* Configure speed, bytesize, etc. of a serial process.
2414 Arguments are specified as keyword/argument pairs. Attributes that
2415 are not given are re-initialized from the process's current
2416 configuration (available via the function `process-contact') or set to
2417 reasonable default values. The following arguments are defined:
2423 -- Any of these arguments can be given to identify the process that is
2424 to be configured. If none of these arguments is given, the current
2425 buffer's process is used.
2427 :speed SPEED -- SPEED is the speed of the serial port in bits per
2428 second, also called baud rate. Any value can be given for SPEED, but
2429 most serial ports work only at a few defined values between 1200 and
2430 115200, with 9600 being the most common value. If SPEED is nil, the
2431 serial port is not configured any further, i.e., all other arguments
2432 are ignored. This may be useful for special serial ports such as
2433 Bluetooth-to-serial converters which can only be configured through AT
2434 commands. A value of nil for SPEED can be used only when passed
2435 through `make-serial-process' or `serial-term'.
2437 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2438 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2440 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2441 `odd' (use odd parity), or the symbol `even' (use even parity). If
2442 PARITY is not given, no parity is used.
2444 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2445 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2446 is not given or nil, 1 stopbit is used.
2448 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2449 flowcontrol to be used, which is either nil (don't use flowcontrol),
2450 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2451 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2452 flowcontrol is used.
2454 `serial-process-configure' is called by `make-serial-process' for the
2455 initial configuration of the serial port.
2459 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2461 \(serial-process-configure
2462 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2464 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2466 usage: (serial-process-configure &rest ARGS) */)
2467 (ptrdiff_t nargs
, Lisp_Object
*args
)
2469 struct Lisp_Process
*p
;
2470 Lisp_Object contact
= Qnil
;
2471 Lisp_Object proc
= Qnil
;
2472 struct gcpro gcpro1
;
2474 contact
= Flist (nargs
, args
);
2477 proc
= Fplist_get (contact
, QCprocess
);
2479 proc
= Fplist_get (contact
, QCname
);
2481 proc
= Fplist_get (contact
, QCbuffer
);
2483 proc
= Fplist_get (contact
, QCport
);
2484 proc
= get_process (proc
);
2485 p
= XPROCESS (proc
);
2486 if (!EQ (p
->type
, Qserial
))
2487 error ("Not a serial process");
2489 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2495 serial_configure (p
, contact
);
2501 /* Used by make-serial-process to recover from errors. */
2503 make_serial_process_unwind (Lisp_Object proc
)
2505 if (!PROCESSP (proc
))
2507 remove_process (proc
);
2511 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2513 doc
: /* Create and return a serial port process.
2515 In Emacs, serial port connections are represented by process objects,
2516 so input and output work as for subprocesses, and `delete-process'
2517 closes a serial port connection. However, a serial process has no
2518 process id, it cannot be signaled, and the status codes are different
2519 from normal processes.
2521 `make-serial-process' creates a process and a buffer, on which you
2522 probably want to use `process-send-string'. Try \\[serial-term] for
2523 an interactive terminal. See below for examples.
2525 Arguments are specified as keyword/argument pairs. The following
2526 arguments are defined:
2528 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2529 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2530 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2531 the backslashes in strings).
2533 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2534 which this function calls.
2536 :name NAME -- NAME is the name of the process. If NAME is not given,
2537 the value of PORT is used.
2539 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2540 with the process. Process output goes at the end of that buffer,
2541 unless you specify an output stream or filter function to handle the
2542 output. If BUFFER is not given, the value of NAME is used.
2544 :coding CODING -- If CODING is a symbol, it specifies the coding
2545 system used for both reading and writing for this process. If CODING
2546 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2547 ENCODING is used for writing.
2549 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2550 the process is running. If BOOL is not given, query before exiting.
2552 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2553 In the stopped state, a serial process does not accept incoming data,
2554 but you can send outgoing data. The stopped state is cleared by
2555 `continue-process' and set by `stop-process'.
2557 :filter FILTER -- Install FILTER as the process filter.
2559 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2561 :plist PLIST -- Install PLIST as the initial plist of the process.
2567 -- This function calls `serial-process-configure' to handle these
2570 The original argument list, possibly modified by later configuration,
2571 is available via the function `process-contact'.
2575 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2577 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2579 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2581 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2583 usage: (make-serial-process &rest ARGS) */)
2584 (ptrdiff_t nargs
, Lisp_Object
*args
)
2587 Lisp_Object proc
, contact
, port
;
2588 struct Lisp_Process
*p
;
2589 struct gcpro gcpro1
;
2590 Lisp_Object name
, buffer
;
2591 Lisp_Object tem
, val
;
2592 ptrdiff_t specpdl_count
= -1;
2597 contact
= Flist (nargs
, args
);
2600 port
= Fplist_get (contact
, QCport
);
2602 error ("No port specified");
2603 CHECK_STRING (port
);
2605 if (NILP (Fplist_member (contact
, QCspeed
)))
2606 error (":speed not specified");
2607 if (!NILP (Fplist_get (contact
, QCspeed
)))
2608 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2610 name
= Fplist_get (contact
, QCname
);
2613 CHECK_STRING (name
);
2614 proc
= make_process (name
);
2615 specpdl_count
= SPECPDL_INDEX ();
2616 record_unwind_protect (make_serial_process_unwind
, proc
);
2617 p
= XPROCESS (proc
);
2619 fd
= serial_open (SSDATA (port
));
2622 if (fd
> max_process_desc
)
2623 max_process_desc
= fd
;
2624 chan_process
[fd
] = proc
;
2626 buffer
= Fplist_get (contact
, QCbuffer
);
2629 buffer
= Fget_buffer_create (buffer
);
2632 p
->childp
= contact
;
2633 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2635 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2636 p
->filter
= Fplist_get (contact
, QCfilter
);
2638 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2639 p
->kill_without_query
= 1;
2640 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2644 if (!EQ (p
->command
, Qt
))
2646 FD_SET (fd
, &input_wait_mask
);
2647 FD_SET (fd
, &non_keyboard_wait_mask
);
2650 if (BUFFERP (buffer
))
2652 set_marker_both (p
->mark
, buffer
,
2653 BUF_ZV (XBUFFER (buffer
)),
2654 BUF_ZV_BYTE (XBUFFER (buffer
)));
2657 tem
= Fplist_member (contact
, QCcoding
);
2658 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2664 val
= XCAR (XCDR (tem
));
2668 else if (!NILP (Vcoding_system_for_read
))
2669 val
= Vcoding_system_for_read
;
2670 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2671 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2673 p
->decode_coding_system
= val
;
2678 val
= XCAR (XCDR (tem
));
2682 else if (!NILP (Vcoding_system_for_write
))
2683 val
= Vcoding_system_for_write
;
2684 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2685 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2687 p
->encode_coding_system
= val
;
2689 setup_process_coding_systems (proc
);
2690 p
->decoding_buf
= empty_unibyte_string
;
2691 p
->decoding_carryover
= 0;
2692 p
->encoding_buf
= empty_unibyte_string
;
2693 p
->inherit_coding_system_flag
2694 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2696 Fserial_process_configure (nargs
, args
);
2698 specpdl_ptr
= specpdl
+ specpdl_count
;
2704 /* Create a network stream/datagram client/server process. Treated
2705 exactly like a normal process when reading and writing. Primary
2706 differences are in status display and process deletion. A network
2707 connection has no PID; you cannot signal it. All you can do is
2708 stop/continue it and deactivate/close it via delete-process */
2710 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2712 doc
: /* Create and return a network server or client process.
2714 In Emacs, network connections are represented by process objects, so
2715 input and output work as for subprocesses and `delete-process' closes
2716 a network connection. However, a network process has no process id,
2717 it cannot be signaled, and the status codes are different from normal
2720 Arguments are specified as keyword/argument pairs. The following
2721 arguments are defined:
2723 :name NAME -- NAME is name for process. It is modified if necessary
2726 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2727 with the process. Process output goes at end of that buffer, unless
2728 you specify an output stream or filter function to handle the output.
2729 BUFFER may be also nil, meaning that this process is not associated
2732 :host HOST -- HOST is name of the host to connect to, or its IP
2733 address. The symbol `local' specifies the local host. If specified
2734 for a server process, it must be a valid name or address for the local
2735 host, and only clients connecting to that address will be accepted.
2737 :service SERVICE -- SERVICE is name of the service desired, or an
2738 integer specifying a port number to connect to. If SERVICE is t,
2739 a random port number is selected for the server. (If Emacs was
2740 compiled with getaddrinfo, a port number can also be specified as a
2741 string, e.g. "80", as well as an integer. This is not portable.)
2743 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2744 stream type connection, `datagram' creates a datagram type connection,
2745 `seqpacket' creates a reliable datagram connection.
2747 :family FAMILY -- FAMILY is the address (and protocol) family for the
2748 service specified by HOST and SERVICE. The default (nil) is to use
2749 whatever address family (IPv4 or IPv6) that is defined for the host
2750 and port number specified by HOST and SERVICE. Other address families
2752 local -- for a local (i.e. UNIX) address specified by SERVICE.
2753 ipv4 -- use IPv4 address family only.
2754 ipv6 -- use IPv6 address family only.
2756 :local ADDRESS -- ADDRESS is the local address used for the connection.
2757 This parameter is ignored when opening a client process. When specified
2758 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2760 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2761 connection. This parameter is ignored when opening a stream server
2762 process. For a datagram server process, it specifies the initial
2763 setting of the remote datagram address. When specified for a client
2764 process, the FAMILY, HOST, and SERVICE args are ignored.
2766 The format of ADDRESS depends on the address family:
2767 - An IPv4 address is represented as an vector of integers [A B C D P]
2768 corresponding to numeric IP address A.B.C.D and port number P.
2769 - A local address is represented as a string with the address in the
2770 local address space.
2771 - An "unsupported family" address is represented by a cons (F . AV)
2772 where F is the family number and AV is a vector containing the socket
2773 address data with one element per address data byte. Do not rely on
2774 this format in portable code, as it may depend on implementation
2775 defined constants, data sizes, and data structure alignment.
2777 :coding CODING -- If CODING is a symbol, it specifies the coding
2778 system used for both reading and writing for this process. If CODING
2779 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2780 ENCODING is used for writing.
2782 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2783 return without waiting for the connection to complete; instead, the
2784 sentinel function will be called with second arg matching "open" (if
2785 successful) or "failed" when the connect completes. Default is to use
2786 a blocking connect (i.e. wait) for stream type connections.
2788 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2789 running when Emacs is exited.
2791 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2792 In the stopped state, a server process does not accept new
2793 connections, and a client process does not handle incoming traffic.
2794 The stopped state is cleared by `continue-process' and set by
2797 :filter FILTER -- Install FILTER as the process filter.
2799 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2800 process filter are multibyte, otherwise they are unibyte.
2801 If this keyword is not specified, the strings are multibyte if
2802 the default value of `enable-multibyte-characters' is non-nil.
2804 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2806 :log LOG -- Install LOG as the server process log function. This
2807 function is called when the server accepts a network connection from a
2808 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2809 is the server process, CLIENT is the new process for the connection,
2810 and MESSAGE is a string.
2812 :plist PLIST -- Install PLIST as the new process' initial plist.
2814 :server QLEN -- if QLEN is non-nil, create a server process for the
2815 specified FAMILY, SERVICE, and connection type (stream or datagram).
2816 If QLEN is an integer, it is used as the max. length of the server's
2817 pending connection queue (also known as the backlog); the default
2818 queue length is 5. Default is to create a client process.
2820 The following network options can be specified for this connection:
2822 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2823 :dontroute BOOL -- Only send to directly connected hosts.
2824 :keepalive BOOL -- Send keep-alive messages on network stream.
2825 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2826 :oobinline BOOL -- Place out-of-band data in receive data stream.
2827 :priority INT -- Set protocol defined priority for sent packets.
2828 :reuseaddr BOOL -- Allow reusing a recently used local address
2829 (this is allowed by default for a server process).
2830 :bindtodevice NAME -- bind to interface NAME. Using this may require
2831 special privileges on some systems.
2833 Consult the relevant system programmer's manual pages for more
2834 information on using these options.
2837 A server process will listen for and accept connections from clients.
2838 When a client connection is accepted, a new network process is created
2839 for the connection with the following parameters:
2841 - The client's process name is constructed by concatenating the server
2842 process' NAME and a client identification string.
2843 - If the FILTER argument is non-nil, the client process will not get a
2844 separate process buffer; otherwise, the client's process buffer is a newly
2845 created buffer named after the server process' BUFFER name or process
2846 NAME concatenated with the client identification string.
2847 - The connection type and the process filter and sentinel parameters are
2848 inherited from the server process' TYPE, FILTER and SENTINEL.
2849 - The client process' contact info is set according to the client's
2850 addressing information (typically an IP address and a port number).
2851 - The client process' plist is initialized from the server's plist.
2853 Notice that the FILTER and SENTINEL args are never used directly by
2854 the server process. Also, the BUFFER argument is not used directly by
2855 the server process, but via the optional :log function, accepted (and
2856 failed) connections may be logged in the server process' buffer.
2858 The original argument list, modified with the actual connection
2859 information, is available via the `process-contact' function.
2861 usage: (make-network-process &rest ARGS) */)
2862 (ptrdiff_t nargs
, Lisp_Object
*args
)
2865 Lisp_Object contact
;
2866 struct Lisp_Process
*p
;
2867 #ifdef HAVE_GETADDRINFO
2868 struct addrinfo ai
, *res
, *lres
;
2869 struct addrinfo hints
;
2870 const char *portstring
;
2872 #else /* HAVE_GETADDRINFO */
2873 struct _emacs_addrinfo
2879 struct sockaddr
*ai_addr
;
2880 struct _emacs_addrinfo
*ai_next
;
2882 #endif /* HAVE_GETADDRINFO */
2883 struct sockaddr_in address_in
;
2884 #ifdef HAVE_LOCAL_SOCKETS
2885 struct sockaddr_un address_un
;
2890 int s
= -1, outch
, inch
;
2891 struct gcpro gcpro1
;
2892 ptrdiff_t count
= SPECPDL_INDEX ();
2894 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2896 Lisp_Object name
, buffer
, host
, service
, address
;
2897 Lisp_Object filter
, sentinel
;
2898 int is_non_blocking_client
= 0;
2899 int is_server
= 0, backlog
= 5;
2906 /* Save arguments for process-contact and clone-process. */
2907 contact
= Flist (nargs
, args
);
2911 /* Ensure socket support is loaded if available. */
2912 init_winsock (TRUE
);
2915 /* :type TYPE (nil: stream, datagram */
2916 tem
= Fplist_get (contact
, QCtype
);
2918 socktype
= SOCK_STREAM
;
2919 #ifdef DATAGRAM_SOCKETS
2920 else if (EQ (tem
, Qdatagram
))
2921 socktype
= SOCK_DGRAM
;
2923 #ifdef HAVE_SEQPACKET
2924 else if (EQ (tem
, Qseqpacket
))
2925 socktype
= SOCK_SEQPACKET
;
2928 error ("Unsupported connection type");
2931 tem
= Fplist_get (contact
, QCserver
);
2934 /* Don't support network sockets when non-blocking mode is
2935 not available, since a blocked Emacs is not useful. */
2936 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2937 error ("Network servers not supported");
2940 if (TYPE_RANGED_INTEGERP (int, tem
))
2941 backlog
= XINT (tem
);
2945 /* Make QCaddress an alias for :local (server) or :remote (client). */
2946 QCaddress
= is_server
? QClocal
: QCremote
;
2949 if (!is_server
&& socktype
!= SOCK_DGRAM
2950 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2952 #ifndef NON_BLOCKING_CONNECT
2953 error ("Non-blocking connect not supported");
2955 is_non_blocking_client
= 1;
2959 name
= Fplist_get (contact
, QCname
);
2960 buffer
= Fplist_get (contact
, QCbuffer
);
2961 filter
= Fplist_get (contact
, QCfilter
);
2962 sentinel
= Fplist_get (contact
, QCsentinel
);
2964 CHECK_STRING (name
);
2966 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2967 ai
.ai_socktype
= socktype
;
2972 /* :local ADDRESS or :remote ADDRESS */
2973 address
= Fplist_get (contact
, QCaddress
);
2974 if (!NILP (address
))
2976 host
= service
= Qnil
;
2978 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2979 error ("Malformed :address");
2980 ai
.ai_family
= family
;
2981 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2982 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2986 /* :family FAMILY -- nil (for Inet), local, or integer. */
2987 tem
= Fplist_get (contact
, QCfamily
);
2990 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2996 #ifdef HAVE_LOCAL_SOCKETS
2997 else if (EQ (tem
, Qlocal
))
3001 else if (EQ (tem
, Qipv6
))
3004 else if (EQ (tem
, Qipv4
))
3006 else if (TYPE_RANGED_INTEGERP (int, tem
))
3007 family
= XINT (tem
);
3009 error ("Unknown address family");
3011 ai
.ai_family
= family
;
3013 /* :service SERVICE -- string, integer (port number), or t (random port). */
3014 service
= Fplist_get (contact
, QCservice
);
3016 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3017 host
= Fplist_get (contact
, QChost
);
3020 if (EQ (host
, Qlocal
))
3021 /* Depending on setup, "localhost" may map to different IPv4 and/or
3022 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3023 host
= build_string ("127.0.0.1");
3024 CHECK_STRING (host
);
3027 #ifdef HAVE_LOCAL_SOCKETS
3028 if (family
== AF_LOCAL
)
3032 message (":family local ignores the :host \"%s\" property",
3034 contact
= Fplist_put (contact
, QChost
, Qnil
);
3037 CHECK_STRING (service
);
3038 memset (&address_un
, 0, sizeof address_un
);
3039 address_un
.sun_family
= AF_LOCAL
;
3040 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3041 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3042 ai
.ai_addrlen
= sizeof address_un
;
3047 /* Slow down polling to every ten seconds.
3048 Some kernels have a bug which causes retrying connect to fail
3049 after a connect. Polling can interfere with gethostbyname too. */
3050 #ifdef POLL_FOR_INPUT
3051 if (socktype
!= SOCK_DGRAM
)
3053 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3054 bind_polling_period (10);
3058 #ifdef HAVE_GETADDRINFO
3059 /* If we have a host, use getaddrinfo to resolve both host and service.
3060 Otherwise, use getservbyname to lookup the service. */
3064 /* SERVICE can either be a string or int.
3065 Convert to a C string for later use by getaddrinfo. */
3066 if (EQ (service
, Qt
))
3068 else if (INTEGERP (service
))
3070 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3071 portstring
= portbuf
;
3075 CHECK_STRING (service
);
3076 portstring
= SSDATA (service
);
3081 memset (&hints
, 0, sizeof (hints
));
3083 hints
.ai_family
= family
;
3084 hints
.ai_socktype
= socktype
;
3085 hints
.ai_protocol
= 0;
3087 #ifdef HAVE_RES_INIT
3091 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3093 #ifdef HAVE_GAI_STRERROR
3094 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3096 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3102 #endif /* HAVE_GETADDRINFO */
3104 /* We end up here if getaddrinfo is not defined, or in case no hostname
3105 has been specified (e.g. for a local server process). */
3107 if (EQ (service
, Qt
))
3109 else if (INTEGERP (service
))
3110 port
= htons ((unsigned short) XINT (service
));
3113 struct servent
*svc_info
;
3114 CHECK_STRING (service
);
3115 svc_info
= getservbyname (SSDATA (service
),
3116 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3118 error ("Unknown service: %s", SDATA (service
));
3119 port
= svc_info
->s_port
;
3122 memset (&address_in
, 0, sizeof address_in
);
3123 address_in
.sin_family
= family
;
3124 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3125 address_in
.sin_port
= port
;
3127 #ifndef HAVE_GETADDRINFO
3130 struct hostent
*host_info_ptr
;
3132 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3133 as it may `hang' Emacs for a very long time. */
3137 #ifdef HAVE_RES_INIT
3141 host_info_ptr
= gethostbyname (SDATA (host
));
3146 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3147 host_info_ptr
->h_length
);
3148 family
= host_info_ptr
->h_addrtype
;
3149 address_in
.sin_family
= family
;
3152 /* Attempt to interpret host as numeric inet address */
3154 unsigned long numeric_addr
;
3155 numeric_addr
= inet_addr (SSDATA (host
));
3156 if (numeric_addr
== -1)
3157 error ("Unknown host \"%s\"", SDATA (host
));
3159 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3160 sizeof (address_in
.sin_addr
));
3164 #endif /* not HAVE_GETADDRINFO */
3166 ai
.ai_family
= family
;
3167 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3168 ai
.ai_addrlen
= sizeof address_in
;
3172 /* Do this in case we never enter the for-loop below. */
3173 count1
= SPECPDL_INDEX ();
3176 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3185 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3192 #ifdef DATAGRAM_SOCKETS
3193 if (!is_server
&& socktype
== SOCK_DGRAM
)
3195 #endif /* DATAGRAM_SOCKETS */
3197 #ifdef NON_BLOCKING_CONNECT
3198 if (is_non_blocking_client
)
3201 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3203 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3215 /* Make us close S if quit. */
3216 record_unwind_protect (close_file_unwind
, make_number (s
));
3218 /* Parse network options in the arg list.
3219 We simply ignore anything which isn't a known option (including other keywords).
3220 An error is signaled if setting a known option fails. */
3221 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3222 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3226 /* Configure as a server socket. */
3228 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3229 explicit :reuseaddr key to override this. */
3230 #ifdef HAVE_LOCAL_SOCKETS
3231 if (family
!= AF_LOCAL
)
3233 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3236 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3237 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3240 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3241 report_file_error ("Cannot bind server socket", Qnil
);
3243 #ifdef HAVE_GETSOCKNAME
3244 if (EQ (service
, Qt
))
3246 struct sockaddr_in sa1
;
3247 socklen_t len1
= sizeof (sa1
);
3248 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3250 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3251 service
= make_number (ntohs (sa1
.sin_port
));
3252 contact
= Fplist_put (contact
, QCservice
, service
);
3257 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3258 report_file_error ("Cannot listen on server socket", Qnil
);
3266 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3269 if (ret
== 0 || xerrno
== EISCONN
)
3271 /* The unwind-protect will be discarded afterwards.
3272 Likewise for immediate_quit. */
3276 #ifdef NON_BLOCKING_CONNECT
3278 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3282 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3289 if (xerrno
== EINTR
)
3291 /* Unlike most other syscalls connect() cannot be called
3292 again. (That would return EALREADY.) The proper way to
3293 wait for completion is select(). */
3301 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3308 report_file_error ("select failed", Qnil
);
3312 len
= sizeof xerrno
;
3313 eassert (FD_ISSET (s
, &fdset
));
3314 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3315 report_file_error ("getsockopt failed", Qnil
);
3317 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3321 #endif /* !WINDOWSNT */
3325 /* Discard the unwind protect closing S. */
3326 specpdl_ptr
= specpdl
+ count1
;
3331 if (xerrno
== EINTR
)
3338 #ifdef DATAGRAM_SOCKETS
3339 if (socktype
== SOCK_DGRAM
)
3341 if (datagram_address
[s
].sa
)
3343 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3344 datagram_address
[s
].len
= lres
->ai_addrlen
;
3348 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3349 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3352 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3353 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3354 conv_lisp_to_sockaddr (rfamily
, remote
,
3355 datagram_address
[s
].sa
, rlen
);
3359 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3362 contact
= Fplist_put (contact
, QCaddress
,
3363 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3364 #ifdef HAVE_GETSOCKNAME
3367 struct sockaddr_in sa1
;
3368 socklen_t len1
= sizeof (sa1
);
3369 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3370 contact
= Fplist_put (contact
, QClocal
,
3371 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3378 #ifdef HAVE_GETADDRINFO
3387 /* Discard the unwind protect for closing S, if any. */
3388 specpdl_ptr
= specpdl
+ count1
;
3390 /* Unwind bind_polling_period and request_sigio. */
3391 unbind_to (count
, Qnil
);
3395 /* If non-blocking got this far - and failed - assume non-blocking is
3396 not supported after all. This is probably a wrong assumption, but
3397 the normal blocking calls to open-network-stream handles this error
3399 if (is_non_blocking_client
)
3404 report_file_error ("make server process failed", contact
);
3406 report_file_error ("make client process failed", contact
);
3413 buffer
= Fget_buffer_create (buffer
);
3414 proc
= make_process (name
);
3416 chan_process
[inch
] = proc
;
3419 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3422 fcntl (inch
, F_SETFL
, O_NDELAY
);
3426 p
= XPROCESS (proc
);
3428 p
->childp
= contact
;
3429 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3433 p
->sentinel
= sentinel
;
3435 p
->log
= Fplist_get (contact
, QClog
);
3436 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3437 p
->kill_without_query
= 1;
3438 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3443 if (is_server
&& socktype
!= SOCK_DGRAM
)
3444 p
->status
= Qlisten
;
3446 /* Make the process marker point into the process buffer (if any). */
3447 if (BUFFERP (buffer
))
3448 set_marker_both (p
->mark
, buffer
,
3449 BUF_ZV (XBUFFER (buffer
)),
3450 BUF_ZV_BYTE (XBUFFER (buffer
)));
3452 #ifdef NON_BLOCKING_CONNECT
3453 if (is_non_blocking_client
)
3455 /* We may get here if connect did succeed immediately. However,
3456 in that case, we still need to signal this like a non-blocking
3458 p
->status
= Qconnect
;
3459 if (!FD_ISSET (inch
, &connect_wait_mask
))
3461 FD_SET (inch
, &connect_wait_mask
);
3462 FD_SET (inch
, &write_mask
);
3463 num_pending_connects
++;
3468 /* A server may have a client filter setting of Qt, but it must
3469 still listen for incoming connects unless it is stopped. */
3470 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3471 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3473 FD_SET (inch
, &input_wait_mask
);
3474 FD_SET (inch
, &non_keyboard_wait_mask
);
3477 if (inch
> max_process_desc
)
3478 max_process_desc
= inch
;
3480 tem
= Fplist_member (contact
, QCcoding
);
3481 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3482 tem
= Qnil
; /* No error message (too late!). */
3485 /* Setup coding systems for communicating with the network stream. */
3486 struct gcpro gcpro1
;
3487 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3488 Lisp_Object coding_systems
= Qt
;
3489 Lisp_Object fargs
[5], val
;
3493 val
= XCAR (XCDR (tem
));
3497 else if (!NILP (Vcoding_system_for_read
))
3498 val
= Vcoding_system_for_read
;
3499 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3500 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3501 /* We dare not decode end-of-line format by setting VAL to
3502 Qraw_text, because the existing Emacs Lisp libraries
3503 assume that they receive bare code including a sequence of
3508 if (NILP (host
) || NILP (service
))
3509 coding_systems
= Qnil
;
3512 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3513 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3515 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3518 if (CONSP (coding_systems
))
3519 val
= XCAR (coding_systems
);
3520 else if (CONSP (Vdefault_process_coding_system
))
3521 val
= XCAR (Vdefault_process_coding_system
);
3525 p
->decode_coding_system
= val
;
3529 val
= XCAR (XCDR (tem
));
3533 else if (!NILP (Vcoding_system_for_write
))
3534 val
= Vcoding_system_for_write
;
3535 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3539 if (EQ (coding_systems
, Qt
))
3541 if (NILP (host
) || NILP (service
))
3542 coding_systems
= Qnil
;
3545 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3546 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3548 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3552 if (CONSP (coding_systems
))
3553 val
= XCDR (coding_systems
);
3554 else if (CONSP (Vdefault_process_coding_system
))
3555 val
= XCDR (Vdefault_process_coding_system
);
3559 p
->encode_coding_system
= val
;
3561 setup_process_coding_systems (proc
);
3563 p
->decoding_buf
= empty_unibyte_string
;
3564 p
->decoding_carryover
= 0;
3565 p
->encoding_buf
= empty_unibyte_string
;
3567 p
->inherit_coding_system_flag
3568 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3575 #if defined (HAVE_NET_IF_H)
3578 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3579 doc
: /* Return an alist of all network interfaces and their network address.
3580 Each element is a cons, the car of which is a string containing the
3581 interface name, and the cdr is the network address in internal
3582 format; see the description of ADDRESS in `make-network-process'. */)
3585 struct ifconf ifconf
;
3586 struct ifreq
*ifreq
;
3588 ptrdiff_t buf_size
= 512;
3592 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3598 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3599 ifconf
.ifc_buf
= buf
;
3600 ifconf
.ifc_len
= buf_size
;
3601 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3608 while (ifconf
.ifc_len
== buf_size
);
3613 ifreq
= ifconf
.ifc_req
;
3614 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3616 struct ifreq
*ifq
= ifreq
;
3617 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3618 #define SIZEOF_IFREQ(sif) \
3619 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3620 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3622 int len
= SIZEOF_IFREQ (ifq
);
3624 int len
= sizeof (*ifreq
);
3626 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3628 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3630 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3633 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3634 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3635 res
= Fcons (Fcons (build_string (namebuf
),
3636 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3637 sizeof (struct sockaddr
))),
3644 #endif /* SIOCGIFCONF */
3646 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3650 const char *flag_sym
;
3653 static const struct ifflag_def ifflag_table
[] = {
3657 #ifdef IFF_BROADCAST
3658 { IFF_BROADCAST
, "broadcast" },
3661 { IFF_DEBUG
, "debug" },
3664 { IFF_LOOPBACK
, "loopback" },
3666 #ifdef IFF_POINTOPOINT
3667 { IFF_POINTOPOINT
, "pointopoint" },
3670 { IFF_RUNNING
, "running" },
3673 { IFF_NOARP
, "noarp" },
3676 { IFF_PROMISC
, "promisc" },
3678 #ifdef IFF_NOTRAILERS
3679 #ifdef NS_IMPL_COCOA
3680 /* Really means smart, notrailers is obsolete */
3681 { IFF_NOTRAILERS
, "smart" },
3683 { IFF_NOTRAILERS
, "notrailers" },
3687 { IFF_ALLMULTI
, "allmulti" },
3690 { IFF_MASTER
, "master" },
3693 { IFF_SLAVE
, "slave" },
3695 #ifdef IFF_MULTICAST
3696 { IFF_MULTICAST
, "multicast" },
3699 { IFF_PORTSEL
, "portsel" },
3701 #ifdef IFF_AUTOMEDIA
3702 { IFF_AUTOMEDIA
, "automedia" },
3705 { IFF_DYNAMIC
, "dynamic" },
3708 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3711 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3714 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3717 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3720 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3725 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3726 doc
: /* Return information about network interface named IFNAME.
3727 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3728 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3729 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3730 FLAGS is the current flags of the interface. */)
3731 (Lisp_Object ifname
)
3734 Lisp_Object res
= Qnil
;
3738 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3739 && defined HAVE_GETIFADDRS && defined LLADDR)
3740 struct ifaddrs
*ifap
;
3743 CHECK_STRING (ifname
);
3745 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3746 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3748 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3753 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3754 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3756 int flags
= rq
.ifr_flags
;
3757 const struct ifflag_def
*fp
;
3760 /* If flags is smaller than int (i.e. short) it may have the high bit set
3761 due to IFF_MULTICAST. In that case, sign extending it into
3763 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3764 flags
= (unsigned short) rq
.ifr_flags
;
3767 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3769 if (flags
& fp
->flag_bit
)
3771 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3772 flags
-= fp
->flag_bit
;
3775 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3779 elt
= Fcons (make_number (fnum
), elt
);
3784 res
= Fcons (elt
, res
);
3787 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3788 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3790 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3791 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3795 for (n
= 0; n
< 6; n
++)
3796 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3797 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3799 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3800 if (getifaddrs (&ifap
) != -1)
3802 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3803 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3806 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3808 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3809 unsigned char linkaddr
[6];
3812 if (it
->ifa_addr
->sa_family
!= AF_LINK
3813 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3814 || sdl
->sdl_alen
!= 6)
3817 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3818 for (n
= 0; n
< 6; n
++)
3819 p
->contents
[n
] = make_number (linkaddr
[n
]);
3821 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3825 #ifdef HAVE_FREEIFADDRS
3829 #endif /* HAVE_GETIFADDRS && LLADDR */
3831 res
= Fcons (elt
, res
);
3834 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3835 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3838 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3839 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3841 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3845 res
= Fcons (elt
, res
);
3848 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3849 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3852 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3855 res
= Fcons (elt
, res
);
3858 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3859 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3862 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3865 res
= Fcons (elt
, res
);
3869 return any
? res
: Qnil
;
3872 #endif /* defined (HAVE_NET_IF_H) */
3874 /* Turn off input and output for process PROC. */
3877 deactivate_process (Lisp_Object proc
)
3879 register int inchannel
, outchannel
;
3880 register struct Lisp_Process
*p
= XPROCESS (proc
);
3883 /* Delete GnuTLS structures in PROC, if any. */
3884 emacs_gnutls_deinit (proc
);
3885 #endif /* HAVE_GNUTLS */
3887 inchannel
= p
->infd
;
3888 outchannel
= p
->outfd
;
3890 #ifdef ADAPTIVE_READ_BUFFERING
3891 if (p
->read_output_delay
> 0)
3893 if (--process_output_delay_count
< 0)
3894 process_output_delay_count
= 0;
3895 p
->read_output_delay
= 0;
3896 p
->read_output_skip
= 0;
3902 /* Beware SIGCHLD hereabouts. */
3903 flush_pending_output (inchannel
);
3904 emacs_close (inchannel
);
3905 if (outchannel
>= 0 && outchannel
!= inchannel
)
3906 emacs_close (outchannel
);
3910 #ifdef DATAGRAM_SOCKETS
3911 if (DATAGRAM_CHAN_P (inchannel
))
3913 xfree (datagram_address
[inchannel
].sa
);
3914 datagram_address
[inchannel
].sa
= 0;
3915 datagram_address
[inchannel
].len
= 0;
3918 chan_process
[inchannel
] = Qnil
;
3919 FD_CLR (inchannel
, &input_wait_mask
);
3920 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3921 #ifdef NON_BLOCKING_CONNECT
3922 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3924 FD_CLR (inchannel
, &connect_wait_mask
);
3925 FD_CLR (inchannel
, &write_mask
);
3926 if (--num_pending_connects
< 0)
3930 if (inchannel
== max_process_desc
)
3933 /* We just closed the highest-numbered process input descriptor,
3934 so recompute the highest-numbered one now. */
3935 max_process_desc
= 0;
3936 for (i
= 0; i
< MAXDESC
; i
++)
3937 if (!NILP (chan_process
[i
]))
3938 max_process_desc
= i
;
3944 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3946 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3947 It is read into the process' buffers or given to their filter functions.
3948 Non-nil arg PROCESS means do not return until some output has been received
3951 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3952 and milliseconds to wait; return after that much time whether or not
3953 there is any subprocess output. If SECONDS is a floating point number,
3954 it specifies a fractional number of seconds to wait.
3955 The MILLISEC argument is obsolete and should be avoided.
3957 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3958 from PROCESS, suspending reading output from other processes.
3959 If JUST-THIS-ONE is an integer, don't run any timers either.
3960 Return non-nil if we received any output before the timeout expired. */)
3961 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3963 int secs
= -1, usecs
= 0;
3965 if (! NILP (process
))
3966 CHECK_PROCESS (process
);
3968 just_this_one
= Qnil
;
3970 if (!NILP (millisec
))
3971 { /* Obsolete calling convention using integers rather than floats. */
3972 CHECK_NUMBER (millisec
);
3974 seconds
= make_float (XINT (millisec
) / 1000.0);
3977 CHECK_NUMBER (seconds
);
3978 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3982 if (!NILP (seconds
))
3984 double duration
= extract_float (seconds
);
3986 duration_to_sec_usec (duration
, &secs
, &usecs
);
3988 else if (!NILP (process
))
3992 (wait_reading_process_output (secs
, usecs
, 0, 0,
3994 !NILP (process
) ? XPROCESS (process
) : NULL
,
3995 NILP (just_this_one
) ? 0 :
3996 !INTEGERP (just_this_one
) ? 1 : -1)
4000 /* Accept a connection for server process SERVER on CHANNEL. */
4002 static int connect_counter
= 0;
4005 server_accept_connection (Lisp_Object server
, int channel
)
4007 Lisp_Object proc
, caller
, name
, buffer
;
4008 Lisp_Object contact
, host
, service
;
4009 struct Lisp_Process
*ps
= XPROCESS (server
);
4010 struct Lisp_Process
*p
;
4014 struct sockaddr_in in
;
4016 struct sockaddr_in6 in6
;
4018 #ifdef HAVE_LOCAL_SOCKETS
4019 struct sockaddr_un un
;
4022 socklen_t len
= sizeof saddr
;
4024 s
= accept (channel
, &saddr
.sa
, &len
);
4033 if (code
== EWOULDBLOCK
)
4037 if (!NILP (ps
->log
))
4038 call3 (ps
->log
, server
, Qnil
,
4039 concat3 (build_string ("accept failed with code"),
4040 Fnumber_to_string (make_number (code
)),
4041 build_string ("\n")));
4047 /* Setup a new process to handle the connection. */
4049 /* Generate a unique identification of the caller, and build contact
4050 information for this process. */
4053 switch (saddr
.sa
.sa_family
)
4057 Lisp_Object args
[5];
4058 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4059 args
[0] = build_string ("%d.%d.%d.%d");
4060 args
[1] = make_number (*ip
++);
4061 args
[2] = make_number (*ip
++);
4062 args
[3] = make_number (*ip
++);
4063 args
[4] = make_number (*ip
++);
4064 host
= Fformat (5, args
);
4065 service
= make_number (ntohs (saddr
.in
.sin_port
));
4067 args
[0] = build_string (" <%s:%d>");
4070 caller
= Fformat (3, args
);
4077 Lisp_Object args
[9];
4078 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4080 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4081 for (i
= 0; i
< 8; i
++)
4082 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4083 host
= Fformat (9, args
);
4084 service
= make_number (ntohs (saddr
.in
.sin_port
));
4086 args
[0] = build_string (" <[%s]:%d>");
4089 caller
= Fformat (3, args
);
4094 #ifdef HAVE_LOCAL_SOCKETS
4098 caller
= Fnumber_to_string (make_number (connect_counter
));
4099 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4103 /* Create a new buffer name for this process if it doesn't have a
4104 filter. The new buffer name is based on the buffer name or
4105 process name of the server process concatenated with the caller
4108 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4112 buffer
= ps
->buffer
;
4114 buffer
= Fbuffer_name (buffer
);
4119 buffer
= concat2 (buffer
, caller
);
4120 buffer
= Fget_buffer_create (buffer
);
4124 /* Generate a unique name for the new server process. Combine the
4125 server process name with the caller identification. */
4127 name
= concat2 (ps
->name
, caller
);
4128 proc
= make_process (name
);
4130 chan_process
[s
] = proc
;
4133 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4136 fcntl (s
, F_SETFL
, O_NDELAY
);
4140 p
= XPROCESS (proc
);
4142 /* Build new contact information for this setup. */
4143 contact
= Fcopy_sequence (ps
->childp
);
4144 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4145 contact
= Fplist_put (contact
, QChost
, host
);
4146 if (!NILP (service
))
4147 contact
= Fplist_put (contact
, QCservice
, service
);
4148 contact
= Fplist_put (contact
, QCremote
,
4149 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4150 #ifdef HAVE_GETSOCKNAME
4152 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4153 contact
= Fplist_put (contact
, QClocal
,
4154 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4157 p
->childp
= contact
;
4158 p
->plist
= Fcopy_sequence (ps
->plist
);
4162 p
->sentinel
= ps
->sentinel
;
4163 p
->filter
= ps
->filter
;
4170 /* Client processes for accepted connections are not stopped initially. */
4171 if (!EQ (p
->filter
, Qt
))
4173 FD_SET (s
, &input_wait_mask
);
4174 FD_SET (s
, &non_keyboard_wait_mask
);
4177 if (s
> max_process_desc
)
4178 max_process_desc
= s
;
4180 /* Setup coding system for new process based on server process.
4181 This seems to be the proper thing to do, as the coding system
4182 of the new process should reflect the settings at the time the
4183 server socket was opened; not the current settings. */
4185 p
->decode_coding_system
= ps
->decode_coding_system
;
4186 p
->encode_coding_system
= ps
->encode_coding_system
;
4187 setup_process_coding_systems (proc
);
4189 p
->decoding_buf
= empty_unibyte_string
;
4190 p
->decoding_carryover
= 0;
4191 p
->encoding_buf
= empty_unibyte_string
;
4193 p
->inherit_coding_system_flag
4194 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4196 if (!NILP (ps
->log
))
4197 call3 (ps
->log
, server
, proc
,
4198 concat3 (build_string ("accept from "),
4199 (STRINGP (host
) ? host
: build_string ("-")),
4200 build_string ("\n")));
4202 if (!NILP (p
->sentinel
))
4203 exec_sentinel (proc
,
4204 concat3 (build_string ("open from "),
4205 (STRINGP (host
) ? host
: build_string ("-")),
4206 build_string ("\n")));
4209 /* This variable is different from waiting_for_input in keyboard.c.
4210 It is used to communicate to a lisp process-filter/sentinel (via the
4211 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4212 for user-input when that process-filter was called.
4213 waiting_for_input cannot be used as that is by definition 0 when
4214 lisp code is being evalled.
4215 This is also used in record_asynch_buffer_change.
4216 For that purpose, this must be 0
4217 when not inside wait_reading_process_output. */
4218 static int waiting_for_user_input_p
;
4221 wait_reading_process_output_unwind (Lisp_Object data
)
4223 waiting_for_user_input_p
= XINT (data
);
4227 /* This is here so breakpoints can be put on it. */
4229 wait_reading_process_output_1 (void)
4233 /* Use a wrapper around select to work around a bug in gdb 5.3.
4234 Normally, the wrapper is optimized away by inlining.
4236 If emacs is stopped inside select, the gdb backtrace doesn't
4237 show the function which called select, so it is practically
4238 impossible to step through wait_reading_process_output. */
4242 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4244 return select (n
, rfd
, wfd
, xfd
, tmo
);
4246 #define select select_wrapper
4249 /* Read and dispose of subprocess output while waiting for timeout to
4250 elapse and/or keyboard input to be available.
4253 timeout in seconds, or
4254 zero for no limit, or
4255 -1 means gobble data immediately available but don't wait for any.
4258 an additional duration to wait, measured in microseconds.
4259 If this is nonzero and time_limit is 0, then the timeout
4260 consists of MICROSECS only.
4262 READ_KBD is a lisp value:
4263 0 to ignore keyboard input, or
4264 1 to return when input is available, or
4265 -1 meaning caller will actually read the input, so don't throw to
4266 the quit handler, or
4268 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4269 output that arrives.
4271 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4272 (and gobble terminal input into the buffer if any arrives).
4274 If WAIT_PROC is specified, wait until something arrives from that
4275 process. The return value is true if we read some input from
4278 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4279 (suspending output from other processes). A negative value
4280 means don't run any timers either.
4282 If WAIT_PROC is specified, then the function returns true if we
4283 received input from that process before the timeout elapsed.
4284 Otherwise, return true if we received input from any process. */
4287 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4289 Lisp_Object wait_for_cell
,
4290 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4292 register int channel
, nfds
;
4293 SELECT_TYPE Available
;
4294 SELECT_TYPE Writeok
;
4296 int check_delay
, no_avail
;
4299 EMACS_TIME timeout
, end_time
;
4300 int wait_channel
= -1;
4301 int got_some_input
= 0;
4302 ptrdiff_t count
= SPECPDL_INDEX ();
4304 FD_ZERO (&Available
);
4307 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4308 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4309 message ("Blocking call to accept-process-output with quit inhibited!!");
4311 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4312 if (wait_proc
!= NULL
)
4313 wait_channel
= wait_proc
->infd
;
4315 record_unwind_protect (wait_reading_process_output_unwind
,
4316 make_number (waiting_for_user_input_p
));
4317 waiting_for_user_input_p
= read_kbd
;
4319 /* Since we may need to wait several times,
4320 compute the absolute time to return at. */
4321 if (time_limit
|| microsecs
)
4323 EMACS_GET_TIME (end_time
);
4324 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4325 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4330 int timeout_reduced_for_timers
= 0;
4332 /* If calling from keyboard input, do not quit
4333 since we want to return C-g as an input character.
4334 Otherwise, do pending quit if requested. */
4339 process_pending_signals ();
4342 /* Exit now if the cell we're waiting for became non-nil. */
4343 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4346 /* Compute time from now till when time limit is up */
4347 /* Exit if already run out */
4348 if (time_limit
== -1)
4350 /* -1 specified for timeout means
4351 gobble output available now
4352 but don't wait at all. */
4354 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4356 else if (time_limit
|| microsecs
)
4358 EMACS_GET_TIME (timeout
);
4359 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4360 if (EMACS_TIME_NEG_P (timeout
))
4365 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4368 /* Normally we run timers here.
4369 But not if wait_for_cell; in those cases,
4370 the wait is supposed to be short,
4371 and those callers cannot handle running arbitrary Lisp code here. */
4372 if (NILP (wait_for_cell
)
4373 && just_wait_proc
>= 0)
4375 EMACS_TIME timer_delay
;
4379 int old_timers_run
= timers_run
;
4380 struct buffer
*old_buffer
= current_buffer
;
4381 Lisp_Object old_window
= selected_window
;
4383 timer_delay
= timer_check ();
4385 /* If a timer has run, this might have changed buffers
4386 an alike. Make read_key_sequence aware of that. */
4387 if (timers_run
!= old_timers_run
4388 && (old_buffer
!= current_buffer
4389 || !EQ (old_window
, selected_window
))
4390 && waiting_for_user_input_p
== -1)
4391 record_asynch_buffer_change ();
4393 if (timers_run
!= old_timers_run
&& do_display
)
4394 /* We must retry, since a timer may have requeued itself
4395 and that could alter the time_delay. */
4396 redisplay_preserve_echo_area (9);
4400 while (!detect_input_pending ());
4402 /* If there is unread keyboard input, also return. */
4404 && requeued_events_pending_p ())
4407 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4409 EMACS_TIME difference
;
4410 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4411 if (EMACS_TIME_NEG_P (difference
))
4413 timeout
= timer_delay
;
4414 timeout_reduced_for_timers
= 1;
4417 /* If time_limit is -1, we are not going to wait at all. */
4418 else if (time_limit
!= -1)
4420 /* This is so a breakpoint can be put here. */
4421 wait_reading_process_output_1 ();
4425 /* Cause C-g and alarm signals to take immediate action,
4426 and cause input available signals to zero out timeout.
4428 It is important that we do this before checking for process
4429 activity. If we get a SIGCHLD after the explicit checks for
4430 process activity, timeout is the only way we will know. */
4432 set_waiting_for_input (&timeout
);
4434 /* If status of something has changed, and no input is
4435 available, notify the user of the change right away. After
4436 this explicit check, we'll let the SIGCHLD handler zap
4437 timeout to get our attention. */
4438 if (update_tick
!= process_tick
)
4443 if (kbd_on_hold_p ())
4446 Atemp
= input_wait_mask
;
4449 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4450 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4452 #ifdef NON_BLOCKING_CONNECT
4453 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4457 (SELECT_TYPE
*)0, &timeout
)
4460 /* It's okay for us to do this and then continue with
4461 the loop, since timeout has already been zeroed out. */
4462 clear_waiting_for_input ();
4463 status_notify (NULL
);
4464 if (do_display
) redisplay_preserve_echo_area (13);
4468 /* Don't wait for output from a non-running process. Just
4469 read whatever data has already been received. */
4470 if (wait_proc
&& wait_proc
->raw_status_new
)
4471 update_status (wait_proc
);
4473 && ! EQ (wait_proc
->status
, Qrun
)
4474 && ! EQ (wait_proc
->status
, Qconnect
))
4476 int nread
, total_nread
= 0;
4478 clear_waiting_for_input ();
4479 XSETPROCESS (proc
, wait_proc
);
4481 /* Read data from the process, until we exhaust it. */
4482 while (wait_proc
->infd
>= 0)
4484 nread
= read_process_output (proc
, wait_proc
->infd
);
4491 total_nread
+= nread
;
4495 else if (nread
== -1 && EIO
== errno
)
4499 else if (nread
== -1 && EAGAIN
== errno
)
4503 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4507 if (total_nread
> 0 && do_display
)
4508 redisplay_preserve_echo_area (10);
4513 /* Wait till there is something to do */
4515 if (wait_proc
&& just_wait_proc
)
4517 if (wait_proc
->infd
< 0) /* Terminated */
4519 FD_SET (wait_proc
->infd
, &Available
);
4523 else if (!NILP (wait_for_cell
))
4525 Available
= non_process_wait_mask
;
4532 Available
= non_keyboard_wait_mask
;
4534 Available
= input_wait_mask
;
4535 Writeok
= write_mask
;
4536 #ifdef SELECT_CANT_DO_WRITE_MASK
4541 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4544 /* If frame size has changed or the window is newly mapped,
4545 redisplay now, before we start to wait. There is a race
4546 condition here; if a SIGIO arrives between now and the select
4547 and indicates that a frame is trashed, the select may block
4548 displaying a trashed screen. */
4549 if (frame_garbaged
&& do_display
)
4551 clear_waiting_for_input ();
4552 redisplay_preserve_echo_area (11);
4554 set_waiting_for_input (&timeout
);
4557 /* Skip the `select' call if input is available and we're
4558 waiting for keyboard input or a cell change (which can be
4559 triggered by processing X events). In the latter case, set
4560 nfds to 1 to avoid breaking the loop. */
4562 if ((read_kbd
|| !NILP (wait_for_cell
))
4563 && detect_input_pending ())
4565 nfds
= read_kbd
? 0 : 1;
4572 #ifdef ADAPTIVE_READ_BUFFERING
4573 /* Set the timeout for adaptive read buffering if any
4574 process has non-zero read_output_skip and non-zero
4575 read_output_delay, and we are not reading output for a
4576 specific wait_channel. It is not executed if
4577 Vprocess_adaptive_read_buffering is nil. */
4578 if (process_output_skip
&& check_delay
> 0)
4580 int usecs
= EMACS_USECS (timeout
);
4581 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4582 usecs
= READ_OUTPUT_DELAY_MAX
;
4583 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4585 proc
= chan_process
[channel
];
4588 /* Find minimum non-zero read_output_delay among the
4589 processes with non-zero read_output_skip. */
4590 if (XPROCESS (proc
)->read_output_delay
> 0)
4593 if (!XPROCESS (proc
)->read_output_skip
)
4595 FD_CLR (channel
, &Available
);
4596 XPROCESS (proc
)->read_output_skip
= 0;
4597 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4598 usecs
= XPROCESS (proc
)->read_output_delay
;
4601 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4602 process_output_skip
= 0;
4605 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4607 #elif defined (HAVE_NS)
4612 (max (max_process_desc
, max_input_desc
) + 1,
4614 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4615 (SELECT_TYPE
*)0, &timeout
);
4618 /* GnuTLS buffers data internally. In lowat mode it leaves
4619 some data in the TCP buffers so that select works, but
4620 with custom pull/push functions we need to check if some
4621 data is available in the buffers manually. */
4626 /* We're not waiting on a specific process, so loop
4627 through all the channels and check for data.
4628 This is a workaround needed for some versions of
4629 the gnutls library -- 2.12.14 has been confirmed
4631 http://comments.gmane.org/gmane.emacs.devel/145074 */
4632 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4633 if (! NILP (chan_process
[channel
]))
4635 struct Lisp_Process
*p
=
4636 XPROCESS (chan_process
[channel
]);
4637 if (p
&& p
->gnutls_p
&& p
->infd
4638 && ((emacs_gnutls_record_check_pending
4643 FD_SET (p
->infd
, &Available
);
4649 /* Check this specific channel. */
4650 if (wait_proc
->gnutls_p
/* Check for valid process. */
4651 /* Do we have pending data? */
4652 && ((emacs_gnutls_record_check_pending
4653 (wait_proc
->gnutls_state
))
4657 /* Set to Available. */
4658 FD_SET (wait_proc
->infd
, &Available
);
4667 /* Make C-g and alarm signals set flags again */
4668 clear_waiting_for_input ();
4670 /* If we woke up due to SIGWINCH, actually change size now. */
4671 do_pending_window_change (0);
4673 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4674 /* We wanted the full specified time, so return now. */
4678 if (xerrno
== EINTR
)
4680 else if (xerrno
== EBADF
)
4683 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4684 the child's closure of the pts gives the parent a SIGHUP, and
4685 the ptc file descriptor is automatically closed,
4686 yielding EBADF here or at select() call above.
4687 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4688 in m/ibmrt-aix.h), and here we just ignore the select error.
4689 Cleanup occurs c/o status_notify after SIGCLD. */
4690 no_avail
= 1; /* Cannot depend on values returned */
4696 error ("select error: %s", emacs_strerror (xerrno
));
4701 FD_ZERO (&Available
);
4705 #if 0 /* When polling is used, interrupt_input is 0,
4706 so get_input_pending should read the input.
4707 So this should not be needed. */
4708 /* If we are using polling for input,
4709 and we see input available, make it get read now.
4710 Otherwise it might not actually get read for a second.
4711 And on hpux, since we turn off polling in wait_reading_process_output,
4712 it might never get read at all if we don't spend much time
4713 outside of wait_reading_process_output. */
4714 if (read_kbd
&& interrupt_input
4715 && keyboard_bit_set (&Available
)
4716 && input_polling_used ())
4717 kill (getpid (), SIGALRM
);
4720 /* Check for keyboard input */
4721 /* If there is any, return immediately
4722 to give it higher priority than subprocesses */
4726 int old_timers_run
= timers_run
;
4727 struct buffer
*old_buffer
= current_buffer
;
4728 Lisp_Object old_window
= selected_window
;
4731 if (detect_input_pending_run_timers (do_display
))
4733 swallow_events (do_display
);
4734 if (detect_input_pending_run_timers (do_display
))
4738 /* If a timer has run, this might have changed buffers
4739 an alike. Make read_key_sequence aware of that. */
4740 if (timers_run
!= old_timers_run
4741 && waiting_for_user_input_p
== -1
4742 && (old_buffer
!= current_buffer
4743 || !EQ (old_window
, selected_window
)))
4744 record_asynch_buffer_change ();
4750 /* If there is unread keyboard input, also return. */
4752 && requeued_events_pending_p ())
4755 /* If we are not checking for keyboard input now,
4756 do process events (but don't run any timers).
4757 This is so that X events will be processed.
4758 Otherwise they may have to wait until polling takes place.
4759 That would causes delays in pasting selections, for example.
4761 (We used to do this only if wait_for_cell.) */
4762 if (read_kbd
== 0 && detect_input_pending ())
4764 swallow_events (do_display
);
4765 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4766 if (detect_input_pending ())
4771 /* Exit now if the cell we're waiting for became non-nil. */
4772 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4776 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4777 go read it. This can happen with X on BSD after logging out.
4778 In that case, there really is no input and no SIGIO,
4779 but select says there is input. */
4781 if (read_kbd
&& interrupt_input
4782 && keyboard_bit_set (&Available
) && ! noninteractive
)
4783 kill (getpid (), SIGIO
);
4787 got_some_input
|= nfds
> 0;
4789 /* If checking input just got us a size-change event from X,
4790 obey it now if we should. */
4791 if (read_kbd
|| ! NILP (wait_for_cell
))
4792 do_pending_window_change (0);
4794 /* Check for data from a process. */
4795 if (no_avail
|| nfds
== 0)
4798 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4800 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4801 if (FD_ISSET (channel
, &Available
)
4803 && (d
->condition
& FOR_READ
) != 0)
4804 d
->func (channel
, d
->data
, 1);
4805 if (FD_ISSET (channel
, &write_mask
)
4807 && (d
->condition
& FOR_WRITE
) != 0)
4808 d
->func (channel
, d
->data
, 0);
4811 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4813 if (FD_ISSET (channel
, &Available
)
4814 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4815 && !FD_ISSET (channel
, &non_process_wait_mask
))
4819 /* If waiting for this channel, arrange to return as
4820 soon as no more input to be processed. No more
4822 if (wait_channel
== channel
)
4828 proc
= chan_process
[channel
];
4832 /* If this is a server stream socket, accept connection. */
4833 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4835 server_accept_connection (proc
, channel
);
4839 /* Read data from the process, starting with our
4840 buffered-ahead character if we have one. */
4842 nread
= read_process_output (proc
, channel
);
4845 /* Since read_process_output can run a filter,
4846 which can call accept-process-output,
4847 don't try to read from any other processes
4848 before doing the select again. */
4849 FD_ZERO (&Available
);
4852 redisplay_preserve_echo_area (12);
4855 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4858 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4859 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4861 else if (nread
== -1 && errno
== EAGAIN
)
4865 else if (nread
== -1 && errno
== EAGAIN
)
4867 /* Note that we cannot distinguish between no input
4868 available now and a closed pipe.
4869 With luck, a closed pipe will be accompanied by
4870 subprocess termination and SIGCHLD. */
4871 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4873 #endif /* O_NDELAY */
4874 #endif /* O_NONBLOCK */
4876 /* On some OSs with ptys, when the process on one end of
4877 a pty exits, the other end gets an error reading with
4878 errno = EIO instead of getting an EOF (0 bytes read).
4879 Therefore, if we get an error reading and errno =
4880 EIO, just continue, because the child process has
4881 exited and should clean itself up soon (e.g. when we
4884 However, it has been known to happen that the SIGCHLD
4885 got lost. So raise the signal again just in case.
4887 else if (nread
== -1 && errno
== EIO
)
4889 struct Lisp_Process
*p
= XPROCESS (proc
);
4891 /* Clear the descriptor now, so we only raise the
4893 FD_CLR (channel
, &input_wait_mask
);
4894 FD_CLR (channel
, &non_keyboard_wait_mask
);
4898 /* If the EIO occurs on a pty, sigchld_handler's
4899 wait3() will not find the process object to
4900 delete. Do it here. */
4901 p
->tick
= ++process_tick
;
4902 p
->status
= Qfailed
;
4905 kill (getpid (), SIGCHLD
);
4907 #endif /* HAVE_PTYS */
4908 /* If we can detect process termination, don't consider the
4909 process gone just because its pipe is closed. */
4911 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4916 /* Preserve status of processes already terminated. */
4917 XPROCESS (proc
)->tick
= ++process_tick
;
4918 deactivate_process (proc
);
4919 if (XPROCESS (proc
)->raw_status_new
)
4920 update_status (XPROCESS (proc
));
4921 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4922 XPROCESS (proc
)->status
4923 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4926 #ifdef NON_BLOCKING_CONNECT
4927 if (FD_ISSET (channel
, &Writeok
)
4928 && FD_ISSET (channel
, &connect_wait_mask
))
4930 struct Lisp_Process
*p
;
4932 FD_CLR (channel
, &connect_wait_mask
);
4933 FD_CLR (channel
, &write_mask
);
4934 if (--num_pending_connects
< 0)
4937 proc
= chan_process
[channel
];
4941 p
= XPROCESS (proc
);
4944 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4945 So only use it on systems where it is known to work. */
4947 socklen_t xlen
= sizeof (xerrno
);
4948 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4953 struct sockaddr pname
;
4954 int pnamelen
= sizeof (pname
);
4956 /* If connection failed, getpeername will fail. */
4958 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4960 /* Obtain connect failure code through error slippage. */
4963 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4970 p
->tick
= ++process_tick
;
4971 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4972 deactivate_process (proc
);
4977 /* Execute the sentinel here. If we had relied on
4978 status_notify to do it later, it will read input
4979 from the process before calling the sentinel. */
4980 exec_sentinel (proc
, build_string ("open\n"));
4981 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4983 FD_SET (p
->infd
, &input_wait_mask
);
4984 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4988 #endif /* NON_BLOCKING_CONNECT */
4989 } /* end for each file descriptor */
4990 } /* end while exit conditions not met */
4992 unbind_to (count
, Qnil
);
4994 /* If calling from keyboard input, do not quit
4995 since we want to return C-g as an input character.
4996 Otherwise, do pending quit if requested. */
4999 /* Prevent input_pending from remaining set if we quit. */
5000 clear_input_pending ();
5004 return got_some_input
;
5007 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5010 read_process_output_call (Lisp_Object fun_and_args
)
5012 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5016 read_process_output_error_handler (Lisp_Object error_val
)
5018 cmd_error_internal (error_val
, "error in process filter: ");
5020 update_echo_area ();
5021 Fsleep_for (make_number (2), Qnil
);
5025 /* Read pending output from the process channel,
5026 starting with our buffered-ahead character if we have one.
5027 Yield number of decoded characters read.
5029 This function reads at most 4096 characters.
5030 If you want to read all available subprocess output,
5031 you must call it repeatedly until it returns zero.
5033 The characters read are decoded according to PROC's coding-system
5037 read_process_output (Lisp_Object proc
, register int channel
)
5039 register ssize_t nbytes
;
5041 register Lisp_Object outstream
;
5042 register struct Lisp_Process
*p
= XPROCESS (proc
);
5043 register ptrdiff_t opoint
;
5044 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5045 int carryover
= p
->decoding_carryover
;
5047 ptrdiff_t count
= SPECPDL_INDEX ();
5048 Lisp_Object odeactivate
;
5050 chars
= (char *) alloca (carryover
+ readmax
);
5052 /* See the comment above. */
5053 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5055 #ifdef DATAGRAM_SOCKETS
5056 /* We have a working select, so proc_buffered_char is always -1. */
5057 if (DATAGRAM_CHAN_P (channel
))
5059 socklen_t len
= datagram_address
[channel
].len
;
5060 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5061 0, datagram_address
[channel
].sa
, &len
);
5066 int buffered
= 0 <= proc_buffered_char
[channel
];
5069 chars
[carryover
] = proc_buffered_char
[channel
];
5070 proc_buffered_char
[channel
] = -1;
5074 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5075 readmax
- buffered
);
5078 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5079 readmax
- buffered
);
5080 #ifdef ADAPTIVE_READ_BUFFERING
5081 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5083 int delay
= p
->read_output_delay
;
5086 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5089 process_output_delay_count
++;
5090 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5093 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5095 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5097 process_output_delay_count
--;
5099 p
->read_output_delay
= delay
;
5102 p
->read_output_skip
= 1;
5103 process_output_skip
= 1;
5108 nbytes
+= buffered
&& nbytes
<= 0;
5111 p
->decoding_carryover
= 0;
5113 /* At this point, NBYTES holds number of bytes just received
5114 (including the one in proc_buffered_char[channel]). */
5117 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5119 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5122 /* Now set NBYTES how many bytes we must decode. */
5123 nbytes
+= carryover
;
5125 odeactivate
= Vdeactivate_mark
;
5126 /* There's no good reason to let process filters change the current
5127 buffer, and many callers of accept-process-output, sit-for, and
5128 friends don't expect current-buffer to be changed from under them. */
5129 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5131 /* Read and dispose of the process output. */
5132 outstream
= p
->filter
;
5133 if (!NILP (outstream
))
5136 int outer_running_asynch_code
= running_asynch_code
;
5137 int waiting
= waiting_for_user_input_p
;
5139 /* No need to gcpro these, because all we do with them later
5140 is test them for EQness, and none of them should be a string. */
5142 Lisp_Object obuffer
, okeymap
;
5143 XSETBUFFER (obuffer
, current_buffer
);
5144 okeymap
= BVAR (current_buffer
, keymap
);
5147 /* We inhibit quit here instead of just catching it so that
5148 hitting ^G when a filter happens to be running won't screw
5150 specbind (Qinhibit_quit
, Qt
);
5151 specbind (Qlast_nonmenu_event
, Qt
);
5153 /* In case we get recursively called,
5154 and we already saved the match data nonrecursively,
5155 save the same match data in safely recursive fashion. */
5156 if (outer_running_asynch_code
)
5159 /* Don't clobber the CURRENT match data, either! */
5160 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5161 restore_search_regs ();
5162 record_unwind_save_match_data ();
5163 Fset_match_data (tem
, Qt
);
5166 /* For speed, if a search happens within this code,
5167 save the match data in a special nonrecursive fashion. */
5168 running_asynch_code
= 1;
5170 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5171 text
= coding
->dst_object
;
5172 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5173 /* A new coding system might be found. */
5174 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5176 p
->decode_coding_system
= Vlast_coding_system_used
;
5178 /* Don't call setup_coding_system for
5179 proc_decode_coding_system[channel] here. It is done in
5180 detect_coding called via decode_coding above. */
5182 /* If a coding system for encoding is not yet decided, we set
5183 it as the same as coding-system for decoding.
5185 But, before doing that we must check if
5186 proc_encode_coding_system[p->outfd] surely points to a
5187 valid memory because p->outfd will be changed once EOF is
5188 sent to the process. */
5189 if (NILP (p
->encode_coding_system
)
5190 && proc_encode_coding_system
[p
->outfd
])
5192 p
->encode_coding_system
5193 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5194 setup_coding_system (p
->encode_coding_system
,
5195 proc_encode_coding_system
[p
->outfd
]);
5199 if (coding
->carryover_bytes
> 0)
5201 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5202 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5203 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5204 coding
->carryover_bytes
);
5205 p
->decoding_carryover
= coding
->carryover_bytes
;
5207 if (SBYTES (text
) > 0)
5208 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5209 sometimes it's simply wrong to wrap (e.g. when called from
5210 accept-process-output). */
5211 internal_condition_case_1 (read_process_output_call
,
5213 Fcons (proc
, Fcons (text
, Qnil
))),
5214 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5215 read_process_output_error_handler
);
5217 /* If we saved the match data nonrecursively, restore it now. */
5218 restore_search_regs ();
5219 running_asynch_code
= outer_running_asynch_code
;
5221 /* Restore waiting_for_user_input_p as it was
5222 when we were called, in case the filter clobbered it. */
5223 waiting_for_user_input_p
= waiting
;
5225 #if 0 /* Call record_asynch_buffer_change unconditionally,
5226 because we might have changed minor modes or other things
5227 that affect key bindings. */
5228 if (! EQ (Fcurrent_buffer (), obuffer
)
5229 || ! EQ (current_buffer
->keymap
, okeymap
))
5231 /* But do it only if the caller is actually going to read events.
5232 Otherwise there's no need to make him wake up, and it could
5233 cause trouble (for example it would make sit_for return). */
5234 if (waiting_for_user_input_p
== -1)
5235 record_asynch_buffer_change ();
5238 /* If no filter, write into buffer if it isn't dead. */
5239 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5241 Lisp_Object old_read_only
;
5242 ptrdiff_t old_begv
, old_zv
;
5243 ptrdiff_t old_begv_byte
, old_zv_byte
;
5244 ptrdiff_t before
, before_byte
;
5245 ptrdiff_t opoint_byte
;
5249 Fset_buffer (p
->buffer
);
5251 opoint_byte
= PT_BYTE
;
5252 old_read_only
= BVAR (current_buffer
, read_only
);
5255 old_begv_byte
= BEGV_BYTE
;
5256 old_zv_byte
= ZV_BYTE
;
5258 BVAR (current_buffer
, read_only
) = Qnil
;
5260 /* Insert new output into buffer
5261 at the current end-of-output marker,
5262 thus preserving logical ordering of input and output. */
5263 if (XMARKER (p
->mark
)->buffer
)
5264 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5265 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5268 SET_PT_BOTH (ZV
, ZV_BYTE
);
5270 before_byte
= PT_BYTE
;
5272 /* If the output marker is outside of the visible region, save
5273 the restriction and widen. */
5274 if (! (BEGV
<= PT
&& PT
<= ZV
))
5277 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5278 text
= coding
->dst_object
;
5279 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5280 /* A new coding system might be found. See the comment in the
5281 similar code in the previous `if' block. */
5282 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5284 p
->decode_coding_system
= Vlast_coding_system_used
;
5285 if (NILP (p
->encode_coding_system
)
5286 && proc_encode_coding_system
[p
->outfd
])
5288 p
->encode_coding_system
5289 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5290 setup_coding_system (p
->encode_coding_system
,
5291 proc_encode_coding_system
[p
->outfd
]);
5294 if (coding
->carryover_bytes
> 0)
5296 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5297 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5298 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5299 coding
->carryover_bytes
);
5300 p
->decoding_carryover
= coding
->carryover_bytes
;
5302 /* Adjust the multibyteness of TEXT to that of the buffer. */
5303 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5304 != ! STRING_MULTIBYTE (text
))
5305 text
= (STRING_MULTIBYTE (text
)
5306 ? Fstring_as_unibyte (text
)
5307 : Fstring_to_multibyte (text
));
5308 /* Insert before markers in case we are inserting where
5309 the buffer's mark is, and the user's next command is Meta-y. */
5310 insert_from_string_before_markers (text
, 0, 0,
5311 SCHARS (text
), SBYTES (text
), 0);
5313 /* Make sure the process marker's position is valid when the
5314 process buffer is changed in the signal_after_change above.
5315 W3 is known to do that. */
5316 if (BUFFERP (p
->buffer
)
5317 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5318 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5320 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5322 update_mode_lines
++;
5324 /* Make sure opoint and the old restrictions
5325 float ahead of any new text just as point would. */
5326 if (opoint
>= before
)
5328 opoint
+= PT
- before
;
5329 opoint_byte
+= PT_BYTE
- before_byte
;
5331 if (old_begv
> before
)
5333 old_begv
+= PT
- before
;
5334 old_begv_byte
+= PT_BYTE
- before_byte
;
5336 if (old_zv
>= before
)
5338 old_zv
+= PT
- before
;
5339 old_zv_byte
+= PT_BYTE
- before_byte
;
5342 /* If the restriction isn't what it should be, set it. */
5343 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5344 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5347 BVAR (current_buffer
, read_only
) = old_read_only
;
5348 SET_PT_BOTH (opoint
, opoint_byte
);
5350 /* Handling the process output should not deactivate the mark. */
5351 Vdeactivate_mark
= odeactivate
;
5353 unbind_to (count
, Qnil
);
5357 /* Sending data to subprocess */
5359 static jmp_buf send_process_frame
;
5360 static Lisp_Object process_sent_to
;
5362 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5363 static void send_process_trap (int) NO_RETURN
;
5367 send_process_trap (int ignore
)
5369 SIGNAL_THREAD_CHECK (SIGPIPE
);
5370 sigunblock (sigmask (SIGPIPE
));
5371 longjmp (send_process_frame
, 1);
5374 /* Send some data to process PROC.
5375 BUF is the beginning of the data; LEN is the number of characters.
5376 OBJECT is the Lisp object that the data comes from. If OBJECT is
5377 nil or t, it means that the data comes from C string.
5379 If OBJECT is not nil, the data is encoded by PROC's coding-system
5380 for encoding before it is sent.
5382 This function can evaluate Lisp code and can garbage collect. */
5385 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5386 volatile ptrdiff_t len
, volatile Lisp_Object object
)
5388 /* Use volatile to protect variables from being clobbered by longjmp. */
5389 struct Lisp_Process
*p
= XPROCESS (proc
);
5391 struct coding_system
*coding
;
5392 struct gcpro gcpro1
;
5393 void (*volatile old_sigpipe
) (int);
5397 if (p
->raw_status_new
)
5399 if (! EQ (p
->status
, Qrun
))
5400 error ("Process %s not running", SDATA (p
->name
));
5402 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5404 coding
= proc_encode_coding_system
[p
->outfd
];
5405 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5407 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5408 || (BUFFERP (object
)
5409 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5412 p
->encode_coding_system
5413 = complement_process_encoding_system (p
->encode_coding_system
);
5414 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5416 /* The coding system for encoding was changed to raw-text
5417 because we sent a unibyte text previously. Now we are
5418 sending a multibyte text, thus we must encode it by the
5419 original coding system specified for the current process.
5421 Another reason we come here is that the coding system
5422 was just complemented and a new one was returned by
5423 complement_process_encoding_system. */
5424 setup_coding_system (p
->encode_coding_system
, coding
);
5425 Vlast_coding_system_used
= p
->encode_coding_system
;
5427 coding
->src_multibyte
= 1;
5431 coding
->src_multibyte
= 0;
5432 /* For sending a unibyte text, character code conversion should
5433 not take place but EOL conversion should. So, setup raw-text
5434 or one of the subsidiary if we have not yet done it. */
5435 if (CODING_REQUIRE_ENCODING (coding
))
5437 if (CODING_REQUIRE_FLUSHING (coding
))
5439 /* But, before changing the coding, we must flush out data. */
5440 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5441 send_process (proc
, "", 0, Qt
);
5442 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5444 setup_coding_system (raw_text_coding_system
5445 (Vlast_coding_system_used
),
5447 coding
->src_multibyte
= 0;
5450 coding
->dst_multibyte
= 0;
5452 if (CODING_REQUIRE_ENCODING (coding
))
5454 coding
->dst_object
= Qt
;
5455 if (BUFFERP (object
))
5457 ptrdiff_t from_byte
, from
, to
;
5458 ptrdiff_t save_pt
, save_pt_byte
;
5459 struct buffer
*cur
= current_buffer
;
5461 set_buffer_internal (XBUFFER (object
));
5462 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5464 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5465 from
= BYTE_TO_CHAR (from_byte
);
5466 to
= BYTE_TO_CHAR (from_byte
+ len
);
5467 TEMP_SET_PT_BOTH (from
, from_byte
);
5468 encode_coding_object (coding
, object
, from
, from_byte
,
5469 to
, from_byte
+ len
, Qt
);
5470 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5471 set_buffer_internal (cur
);
5473 else if (STRINGP (object
))
5475 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5476 SBYTES (object
), Qt
);
5480 coding
->dst_object
= make_unibyte_string (buf
, len
);
5481 coding
->produced
= len
;
5484 len
= coding
->produced
;
5485 object
= coding
->dst_object
;
5486 buf
= SSDATA (object
);
5489 if (pty_max_bytes
== 0)
5491 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5492 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5493 if (pty_max_bytes
< 0)
5494 pty_max_bytes
= 250;
5496 pty_max_bytes
= 250;
5498 /* Deduct one, to leave space for the eof. */
5502 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5503 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5504 when returning with longjmp despite being declared volatile. */
5505 if (!setjmp (send_process_frame
))
5507 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5509 process_sent_to
= proc
;
5512 ptrdiff_t this = len
;
5514 /* Send this batch, using one or more write calls. */
5517 ptrdiff_t written
= 0;
5518 int outfd
= p
->outfd
;
5519 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5520 #ifdef DATAGRAM_SOCKETS
5521 if (DATAGRAM_CHAN_P (outfd
))
5523 rv
= sendto (outfd
, buf
, this,
5524 0, datagram_address
[outfd
].sa
,
5525 datagram_address
[outfd
].len
);
5528 else if (errno
== EMSGSIZE
)
5530 signal (SIGPIPE
, old_sigpipe
);
5531 report_file_error ("sending datagram",
5532 Fcons (proc
, Qnil
));
5540 written
= emacs_gnutls_write (p
, buf
, this);
5543 written
= emacs_write (outfd
, buf
, this);
5544 rv
= (written
? 0 : -1);
5545 #ifdef ADAPTIVE_READ_BUFFERING
5546 if (p
->read_output_delay
> 0
5547 && p
->adaptive_read_buffering
== 1)
5549 p
->read_output_delay
= 0;
5550 process_output_delay_count
--;
5551 p
->read_output_skip
= 0;
5555 signal (SIGPIPE
, old_sigpipe
);
5561 || errno
== EWOULDBLOCK
5567 /* Buffer is full. Wait, accepting input;
5568 that may allow the program
5569 to finish doing output and read more. */
5571 ptrdiff_t offset
= 0;
5573 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5574 /* A gross hack to work around a bug in FreeBSD.
5575 In the following sequence, read(2) returns
5579 write(2) 954 bytes, get EAGAIN
5580 read(2) 1024 bytes in process_read_output
5581 read(2) 11 bytes in process_read_output
5583 That is, read(2) returns more bytes than have
5584 ever been written successfully. The 1033 bytes
5585 read are the 1022 bytes written successfully
5586 after processing (for example with CRs added if
5587 the terminal is set up that way which it is
5588 here). The same bytes will be seen again in a
5589 later read(2), without the CRs. */
5591 if (errno
== EAGAIN
)
5594 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5596 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5598 /* Running filters might relocate buffers or strings.
5599 Arrange to relocate BUF. */
5600 if (BUFFERP (object
))
5601 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5602 (unsigned char *) buf
);
5603 else if (STRINGP (object
))
5604 offset
= buf
- SSDATA (object
);
5606 #ifdef EMACS_HAS_USECS
5607 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5609 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5612 if (BUFFERP (object
))
5613 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5615 else if (STRINGP (object
))
5616 buf
= offset
+ SSDATA (object
);
5619 /* This is a real error. */
5620 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5630 signal (SIGPIPE
, old_sigpipe
);
5631 proc
= process_sent_to
;
5632 p
= XPROCESS (proc
);
5633 p
->raw_status_new
= 0;
5634 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5635 p
->tick
= ++process_tick
;
5636 deactivate_process (proc
);
5637 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5643 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5645 doc
: /* Send current contents of region as input to PROCESS.
5646 PROCESS may be a process, a buffer, the name of a process or buffer, or
5647 nil, indicating the current buffer's process.
5648 Called from program, takes three arguments, PROCESS, START and END.
5649 If the region is more than 500 characters long,
5650 it is sent in several bunches. This may happen even for shorter regions.
5651 Output from processes can arrive in between bunches. */)
5652 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5655 ptrdiff_t start1
, end1
;
5657 proc
= get_process (process
);
5658 validate_region (&start
, &end
);
5660 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5661 move_gap (XINT (start
));
5663 start1
= CHAR_TO_BYTE (XINT (start
));
5664 end1
= CHAR_TO_BYTE (XINT (end
));
5665 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5666 Fcurrent_buffer ());
5671 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5673 doc
: /* Send PROCESS the contents of STRING as input.
5674 PROCESS may be a process, a buffer, the name of a process or buffer, or
5675 nil, indicating the current buffer's process.
5676 If STRING is more than 500 characters long,
5677 it is sent in several bunches. This may happen even for shorter strings.
5678 Output from processes can arrive in between bunches. */)
5679 (Lisp_Object process
, Lisp_Object string
)
5682 CHECK_STRING (string
);
5683 proc
= get_process (process
);
5684 send_process (proc
, SSDATA (string
),
5685 SBYTES (string
), string
);
5689 /* Return the foreground process group for the tty/pty that
5690 the process P uses. */
5692 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5697 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5700 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5701 master side. Try the slave side. */
5702 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5706 ioctl (fd
, TIOCGPGRP
, &gid
);
5710 #endif /* defined (TIOCGPGRP ) */
5715 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5716 Sprocess_running_child_p
, 0, 1, 0,
5717 doc
: /* Return t if PROCESS has given the terminal to a child.
5718 If the operating system does not make it possible to find out,
5719 return t unconditionally. */)
5720 (Lisp_Object process
)
5722 /* Initialize in case ioctl doesn't exist or gives an error,
5723 in a way that will cause returning t. */
5726 struct Lisp_Process
*p
;
5728 proc
= get_process (process
);
5729 p
= XPROCESS (proc
);
5731 if (!EQ (p
->type
, Qreal
))
5732 error ("Process %s is not a subprocess",
5735 error ("Process %s is not active",
5738 gid
= emacs_get_tty_pgrp (p
);
5745 /* send a signal number SIGNO to PROCESS.
5746 If CURRENT_GROUP is t, that means send to the process group
5747 that currently owns the terminal being used to communicate with PROCESS.
5748 This is used for various commands in shell mode.
5749 If CURRENT_GROUP is lambda, that means send to the process group
5750 that currently owns the terminal, but only if it is NOT the shell itself.
5752 If NOMSG is zero, insert signal-announcements into process's buffers
5755 If we can, we try to signal PROCESS by sending control characters
5756 down the pty. This allows us to signal inferiors who have changed
5757 their uid, for which killpg would return an EPERM error. */
5760 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5764 register struct Lisp_Process
*p
;
5768 proc
= get_process (process
);
5769 p
= XPROCESS (proc
);
5771 if (!EQ (p
->type
, Qreal
))
5772 error ("Process %s is not a subprocess",
5775 error ("Process %s is not active",
5779 current_group
= Qnil
;
5781 /* If we are using pgrps, get a pgrp number and make it negative. */
5782 if (NILP (current_group
))
5783 /* Send the signal to the shell's process group. */
5787 #ifdef SIGNALS_VIA_CHARACTERS
5788 /* If possible, send signals to the entire pgrp
5789 by sending an input character to it. */
5792 cc_t
*sig_char
= NULL
;
5794 tcgetattr (p
->infd
, &t
);
5799 sig_char
= &t
.c_cc
[VINTR
];
5803 sig_char
= &t
.c_cc
[VQUIT
];
5807 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5808 sig_char
= &t
.c_cc
[VSWTCH
];
5810 sig_char
= &t
.c_cc
[VSUSP
];
5815 if (sig_char
&& *sig_char
!= CDISABLE
)
5817 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5820 /* If we can't send the signal with a character,
5821 fall through and send it another way. */
5823 /* The code above may fall through if it can't
5824 handle the signal. */
5825 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5828 /* Get the current pgrp using the tty itself, if we have that.
5829 Otherwise, use the pty to get the pgrp.
5830 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5831 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5832 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5833 His patch indicates that if TIOCGPGRP returns an error, then
5834 we should just assume that p->pid is also the process group id. */
5836 gid
= emacs_get_tty_pgrp (p
);
5839 /* If we can't get the information, assume
5840 the shell owns the tty. */
5843 /* It is not clear whether anything really can set GID to -1.
5844 Perhaps on some system one of those ioctls can or could do so.
5845 Or perhaps this is vestigial. */
5848 #else /* ! defined (TIOCGPGRP ) */
5849 /* Can't select pgrps on this system, so we know that
5850 the child itself heads the pgrp. */
5852 #endif /* ! defined (TIOCGPGRP ) */
5854 /* If current_group is lambda, and the shell owns the terminal,
5855 don't send any signal. */
5856 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5864 p
->raw_status_new
= 0;
5866 p
->tick
= ++process_tick
;
5869 status_notify (NULL
);
5870 redisplay_preserve_echo_area (13);
5873 #endif /* ! defined (SIGCONT) */
5877 flush_pending_output (p
->infd
);
5881 /* If we don't have process groups, send the signal to the immediate
5882 subprocess. That isn't really right, but it's better than any
5883 obvious alternative. */
5886 kill (p
->pid
, signo
);
5890 /* gid may be a pid, or minus a pgrp's number */
5892 if (!NILP (current_group
))
5894 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5895 EMACS_KILLPG (gid
, signo
);
5902 #else /* ! defined (TIOCSIGSEND) */
5903 EMACS_KILLPG (gid
, signo
);
5904 #endif /* ! defined (TIOCSIGSEND) */
5907 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5908 doc
: /* Interrupt process PROCESS.
5909 PROCESS may be a process, a buffer, or the name of a process or buffer.
5910 No arg or nil means current buffer's process.
5911 Second arg CURRENT-GROUP non-nil means send signal to
5912 the current process-group of the process's controlling terminal
5913 rather than to the process's own process group.
5914 If the process is a shell, this means interrupt current subjob
5915 rather than the shell.
5917 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5918 don't send the signal. */)
5919 (Lisp_Object process
, Lisp_Object current_group
)
5921 process_send_signal (process
, SIGINT
, current_group
, 0);
5925 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5926 doc
: /* Kill process PROCESS. May be process or name of one.
5927 See function `interrupt-process' for more details on usage. */)
5928 (Lisp_Object process
, Lisp_Object current_group
)
5930 process_send_signal (process
, SIGKILL
, current_group
, 0);
5934 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5935 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5936 See function `interrupt-process' for more details on usage. */)
5937 (Lisp_Object process
, Lisp_Object current_group
)
5939 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5943 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5944 doc
: /* Stop process PROCESS. May be process or name of one.
5945 See function `interrupt-process' for more details on usage.
5946 If PROCESS is a network or serial process, inhibit handling of incoming
5948 (Lisp_Object process
, Lisp_Object current_group
)
5950 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5952 struct Lisp_Process
*p
;
5954 p
= XPROCESS (process
);
5955 if (NILP (p
->command
)
5958 FD_CLR (p
->infd
, &input_wait_mask
);
5959 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5965 error ("No SIGTSTP support");
5967 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5972 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5973 doc
: /* Continue process PROCESS. May be process or name of one.
5974 See function `interrupt-process' for more details on usage.
5975 If PROCESS is a network or serial process, resume handling of incoming
5977 (Lisp_Object process
, Lisp_Object current_group
)
5979 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5981 struct Lisp_Process
*p
;
5983 p
= XPROCESS (process
);
5984 if (EQ (p
->command
, Qt
)
5986 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5988 FD_SET (p
->infd
, &input_wait_mask
);
5989 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5991 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5992 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5993 #else /* not WINDOWSNT */
5994 tcflush (p
->infd
, TCIFLUSH
);
5995 #endif /* not WINDOWSNT */
6001 process_send_signal (process
, SIGCONT
, current_group
, 0);
6003 error ("No SIGCONT support");
6008 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6009 2, 2, "sProcess (name or number): \nnSignal code: ",
6010 doc
: /* Send PROCESS the signal with code SIGCODE.
6011 PROCESS may also be a number specifying the process id of the
6012 process to signal; in this case, the process need not be a child of
6014 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6015 (Lisp_Object process
, Lisp_Object sigcode
)
6019 if (STRINGP (process
))
6021 Lisp_Object tem
= Fget_process (process
);
6024 Lisp_Object process_number
=
6025 string_to_number (SSDATA (process
), 10, 1);
6026 if (INTEGERP (process_number
) || FLOATP (process_number
))
6027 tem
= process_number
;
6031 else if (!NUMBERP (process
))
6032 process
= get_process (process
);
6037 if (NUMBERP (process
))
6038 CONS_TO_INTEGER (process
, pid_t
, pid
);
6041 CHECK_PROCESS (process
);
6042 pid
= XPROCESS (process
)->pid
;
6044 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6047 #define parse_signal(NAME, VALUE) \
6048 else if (!xstrcasecmp (name, NAME)) \
6049 XSETINT (sigcode, VALUE)
6051 if (INTEGERP (sigcode
))
6052 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6057 CHECK_SYMBOL (sigcode
);
6058 name
= SSDATA (SYMBOL_NAME (sigcode
));
6060 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6066 parse_signal ("usr1", SIGUSR1
);
6069 parse_signal ("usr2", SIGUSR2
);
6072 parse_signal ("term", SIGTERM
);
6075 parse_signal ("hup", SIGHUP
);
6078 parse_signal ("int", SIGINT
);
6081 parse_signal ("quit", SIGQUIT
);
6084 parse_signal ("ill", SIGILL
);
6087 parse_signal ("abrt", SIGABRT
);
6090 parse_signal ("emt", SIGEMT
);
6093 parse_signal ("kill", SIGKILL
);
6096 parse_signal ("fpe", SIGFPE
);
6099 parse_signal ("bus", SIGBUS
);
6102 parse_signal ("segv", SIGSEGV
);
6105 parse_signal ("sys", SIGSYS
);
6108 parse_signal ("pipe", SIGPIPE
);
6111 parse_signal ("alrm", SIGALRM
);
6114 parse_signal ("urg", SIGURG
);
6117 parse_signal ("stop", SIGSTOP
);
6120 parse_signal ("tstp", SIGTSTP
);
6123 parse_signal ("cont", SIGCONT
);
6126 parse_signal ("chld", SIGCHLD
);
6129 parse_signal ("ttin", SIGTTIN
);
6132 parse_signal ("ttou", SIGTTOU
);
6135 parse_signal ("io", SIGIO
);
6138 parse_signal ("xcpu", SIGXCPU
);
6141 parse_signal ("xfsz", SIGXFSZ
);
6144 parse_signal ("vtalrm", SIGVTALRM
);
6147 parse_signal ("prof", SIGPROF
);
6150 parse_signal ("winch", SIGWINCH
);
6153 parse_signal ("info", SIGINFO
);
6156 error ("Undefined signal name %s", name
);
6161 return make_number (kill (pid
, XINT (sigcode
)));
6164 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6165 doc
: /* Make PROCESS see end-of-file in its input.
6166 EOF comes after any text already sent to it.
6167 PROCESS may be a process, a buffer, the name of a process or buffer, or
6168 nil, indicating the current buffer's process.
6169 If PROCESS is a network connection, or is a process communicating
6170 through a pipe (as opposed to a pty), then you cannot send any more
6171 text to PROCESS after you call this function.
6172 If PROCESS is a serial process, wait until all output written to the
6173 process has been transmitted to the serial port. */)
6174 (Lisp_Object process
)
6177 struct coding_system
*coding
;
6179 if (DATAGRAM_CONN_P (process
))
6182 proc
= get_process (process
);
6183 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6185 /* Make sure the process is really alive. */
6186 if (XPROCESS (proc
)->raw_status_new
)
6187 update_status (XPROCESS (proc
));
6188 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6189 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6191 if (CODING_REQUIRE_FLUSHING (coding
))
6193 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6194 send_process (proc
, "", 0, Qnil
);
6197 if (XPROCESS (proc
)->pty_flag
)
6198 send_process (proc
, "\004", 1, Qnil
);
6199 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6202 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6203 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6204 #endif /* not WINDOWSNT */
6205 /* Do nothing on Windows because writes are blocking. */
6209 int old_outfd
, new_outfd
;
6211 #ifdef HAVE_SHUTDOWN
6212 /* If this is a network connection, or socketpair is used
6213 for communication with the subprocess, call shutdown to cause EOF.
6214 (In some old system, shutdown to socketpair doesn't work.
6215 Then we just can't win.) */
6216 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6217 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6218 shutdown (XPROCESS (proc
)->outfd
, 1);
6219 /* In case of socketpair, outfd == infd, so don't close it. */
6220 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6221 emacs_close (XPROCESS (proc
)->outfd
);
6222 #else /* not HAVE_SHUTDOWN */
6223 emacs_close (XPROCESS (proc
)->outfd
);
6224 #endif /* not HAVE_SHUTDOWN */
6225 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6228 old_outfd
= XPROCESS (proc
)->outfd
;
6230 if (!proc_encode_coding_system
[new_outfd
])
6231 proc_encode_coding_system
[new_outfd
]
6232 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6233 memcpy (proc_encode_coding_system
[new_outfd
],
6234 proc_encode_coding_system
[old_outfd
],
6235 sizeof (struct coding_system
));
6236 memset (proc_encode_coding_system
[old_outfd
], 0,
6237 sizeof (struct coding_system
));
6239 XPROCESS (proc
)->outfd
= new_outfd
;
6244 /* On receipt of a signal that a child status has changed, loop asking
6245 about children with changed statuses until the system says there
6248 All we do is change the status; we do not run sentinels or print
6249 notifications. That is saved for the next time keyboard input is
6250 done, in order to avoid timing errors.
6252 ** WARNING: this can be called during garbage collection.
6253 Therefore, it must not be fooled by the presence of mark bits in
6256 ** USG WARNING: Although it is not obvious from the documentation
6257 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6258 signal() before executing at least one wait(), otherwise the
6259 handler will be called again, resulting in an infinite loop. The
6260 relevant portion of the documentation reads "SIGCLD signals will be
6261 queued and the signal-catching function will be continually
6262 reentered until the queue is empty". Invoking signal() causes the
6263 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6266 ** Malloc WARNING: This should never call malloc either directly or
6267 indirectly; if it does, that is a bug */
6271 sigchld_handler (int signo
)
6273 int old_errno
= errno
;
6275 struct Lisp_Process
*p
;
6277 SIGNAL_THREAD_CHECK (signo
);
6288 #endif /* no WUNTRACED */
6289 /* Keep trying to get a status until we get a definitive result. */
6293 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6295 while (pid
< 0 && errno
== EINTR
);
6299 /* PID == 0 means no processes found, PID == -1 means a real
6300 failure. We have done all our job, so return. */
6307 #endif /* no WNOHANG */
6309 /* Find the process that signaled us, and record its status. */
6311 /* The process can have been deleted by Fdelete_process. */
6312 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6314 Lisp_Object xpid
= XCAR (tail
);
6315 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6316 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6318 XSETCAR (tail
, Qnil
);
6319 goto sigchld_end_of_loop
;
6323 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6325 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6327 proc
= XCDR (XCAR (tail
));
6328 p
= XPROCESS (proc
);
6329 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6334 /* Look for an asynchronous process whose pid hasn't been filled
6337 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6339 proc
= XCDR (XCAR (tail
));
6340 p
= XPROCESS (proc
);
6346 /* Change the status of the process that was found. */
6349 int clear_desc_flag
= 0;
6351 p
->tick
= ++process_tick
;
6353 p
->raw_status_new
= 1;
6355 /* If process has terminated, stop waiting for its output. */
6356 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6358 clear_desc_flag
= 1;
6360 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6361 if (clear_desc_flag
)
6363 FD_CLR (p
->infd
, &input_wait_mask
);
6364 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6367 /* Tell wait_reading_process_output that it needs to wake up and
6369 if (input_available_clear_time
)
6370 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6373 /* There was no asynchronous process found for that pid: we have
6374 a synchronous process. */
6377 synch_process_alive
= 0;
6379 /* Report the status of the synchronous process. */
6381 synch_process_retcode
= WRETCODE (w
);
6382 else if (WIFSIGNALED (w
))
6383 synch_process_termsig
= WTERMSIG (w
);
6385 /* Tell wait_reading_process_output that it needs to wake up and
6387 if (input_available_clear_time
)
6388 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6391 sigchld_end_of_loop
:
6394 /* On some systems, we must return right away.
6395 If any more processes want to signal us, we will
6397 Otherwise (on systems that have WNOHANG), loop around
6398 to use up all the processes that have something to tell us. */
6399 #if (defined WINDOWSNT \
6400 || (defined USG && !defined GNU_LINUX \
6401 && !(defined HPUX && defined WNOHANG)))
6404 #endif /* USG, but not HPUX with WNOHANG */
6407 #endif /* SIGCHLD */
6411 exec_sentinel_unwind (Lisp_Object data
)
6413 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6418 exec_sentinel_error_handler (Lisp_Object error_val
)
6420 cmd_error_internal (error_val
, "error in process sentinel: ");
6422 update_echo_area ();
6423 Fsleep_for (make_number (2), Qnil
);
6428 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6430 Lisp_Object sentinel
, odeactivate
;
6431 register struct Lisp_Process
*p
= XPROCESS (proc
);
6432 ptrdiff_t count
= SPECPDL_INDEX ();
6433 int outer_running_asynch_code
= running_asynch_code
;
6434 int waiting
= waiting_for_user_input_p
;
6436 if (inhibit_sentinels
)
6439 /* No need to gcpro these, because all we do with them later
6440 is test them for EQness, and none of them should be a string. */
6441 odeactivate
= Vdeactivate_mark
;
6443 Lisp_Object obuffer
, okeymap
;
6444 XSETBUFFER (obuffer
, current_buffer
);
6445 okeymap
= BVAR (current_buffer
, keymap
);
6448 /* There's no good reason to let sentinels change the current
6449 buffer, and many callers of accept-process-output, sit-for, and
6450 friends don't expect current-buffer to be changed from under them. */
6451 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6453 sentinel
= p
->sentinel
;
6454 if (NILP (sentinel
))
6457 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6458 assure that it gets restored no matter how the sentinel exits. */
6460 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6461 /* Inhibit quit so that random quits don't screw up a running filter. */
6462 specbind (Qinhibit_quit
, Qt
);
6463 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6465 /* In case we get recursively called,
6466 and we already saved the match data nonrecursively,
6467 save the same match data in safely recursive fashion. */
6468 if (outer_running_asynch_code
)
6471 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6472 restore_search_regs ();
6473 record_unwind_save_match_data ();
6474 Fset_match_data (tem
, Qt
);
6477 /* For speed, if a search happens within this code,
6478 save the match data in a special nonrecursive fashion. */
6479 running_asynch_code
= 1;
6481 internal_condition_case_1 (read_process_output_call
,
6483 Fcons (proc
, Fcons (reason
, Qnil
))),
6484 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6485 exec_sentinel_error_handler
);
6487 /* If we saved the match data nonrecursively, restore it now. */
6488 restore_search_regs ();
6489 running_asynch_code
= outer_running_asynch_code
;
6491 Vdeactivate_mark
= odeactivate
;
6493 /* Restore waiting_for_user_input_p as it was
6494 when we were called, in case the filter clobbered it. */
6495 waiting_for_user_input_p
= waiting
;
6498 if (! EQ (Fcurrent_buffer (), obuffer
)
6499 || ! EQ (current_buffer
->keymap
, okeymap
))
6501 /* But do it only if the caller is actually going to read events.
6502 Otherwise there's no need to make him wake up, and it could
6503 cause trouble (for example it would make sit_for return). */
6504 if (waiting_for_user_input_p
== -1)
6505 record_asynch_buffer_change ();
6507 unbind_to (count
, Qnil
);
6510 /* Report all recent events of a change in process status
6511 (either run the sentinel or output a message).
6512 This is usually done while Emacs is waiting for keyboard input
6513 but can be done at other times. */
6516 status_notify (struct Lisp_Process
*deleting_process
)
6518 register Lisp_Object proc
, buffer
;
6519 Lisp_Object tail
, msg
;
6520 struct gcpro gcpro1
, gcpro2
;
6524 /* We need to gcpro tail; if read_process_output calls a filter
6525 which deletes a process and removes the cons to which tail points
6526 from Vprocess_alist, and then causes a GC, tail is an unprotected
6530 /* Set this now, so that if new processes are created by sentinels
6531 that we run, we get called again to handle their status changes. */
6532 update_tick
= process_tick
;
6534 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6537 register struct Lisp_Process
*p
;
6539 proc
= Fcdr (XCAR (tail
));
6540 p
= XPROCESS (proc
);
6542 if (p
->tick
!= p
->update_tick
)
6544 p
->update_tick
= p
->tick
;
6546 /* If process is still active, read any output that remains. */
6547 while (! EQ (p
->filter
, Qt
)
6548 && ! EQ (p
->status
, Qconnect
)
6549 && ! EQ (p
->status
, Qlisten
)
6550 /* Network or serial process not stopped: */
6551 && ! EQ (p
->command
, Qt
)
6553 && p
!= deleting_process
6554 && read_process_output (proc
, p
->infd
) > 0);
6558 /* Get the text to use for the message. */
6559 if (p
->raw_status_new
)
6561 msg
= status_message (p
);
6563 /* If process is terminated, deactivate it or delete it. */
6565 if (CONSP (p
->status
))
6566 symbol
= XCAR (p
->status
);
6568 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6569 || EQ (symbol
, Qclosed
))
6571 if (delete_exited_processes
)
6572 remove_process (proc
);
6574 deactivate_process (proc
);
6577 /* The actions above may have further incremented p->tick.
6578 So set p->update_tick again
6579 so that an error in the sentinel will not cause
6580 this code to be run again. */
6581 p
->update_tick
= p
->tick
;
6582 /* Now output the message suitably. */
6583 if (!NILP (p
->sentinel
))
6584 exec_sentinel (proc
, msg
);
6585 /* Don't bother with a message in the buffer
6586 when a process becomes runnable. */
6587 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6590 struct buffer
*old
= current_buffer
;
6591 ptrdiff_t opoint
, opoint_byte
;
6592 ptrdiff_t before
, before_byte
;
6594 /* Avoid error if buffer is deleted
6595 (probably that's why the process is dead, too) */
6596 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6598 Fset_buffer (buffer
);
6601 opoint_byte
= PT_BYTE
;
6602 /* Insert new output into buffer
6603 at the current end-of-output marker,
6604 thus preserving logical ordering of input and output. */
6605 if (XMARKER (p
->mark
)->buffer
)
6606 Fgoto_char (p
->mark
);
6608 SET_PT_BOTH (ZV
, ZV_BYTE
);
6611 before_byte
= PT_BYTE
;
6613 tem
= BVAR (current_buffer
, read_only
);
6614 BVAR (current_buffer
, read_only
) = Qnil
;
6615 insert_string ("\nProcess ");
6616 Finsert (1, &p
->name
);
6617 insert_string (" ");
6619 BVAR (current_buffer
, read_only
) = tem
;
6620 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6622 if (opoint
>= before
)
6623 SET_PT_BOTH (opoint
+ (PT
- before
),
6624 opoint_byte
+ (PT_BYTE
- before_byte
));
6626 SET_PT_BOTH (opoint
, opoint_byte
);
6628 set_buffer_internal (old
);
6633 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6638 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6639 Sset_process_coding_system
, 1, 3, 0,
6640 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6641 DECODING will be used to decode subprocess output and ENCODING to
6642 encode subprocess input. */)
6643 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6645 register struct Lisp_Process
*p
;
6647 CHECK_PROCESS (process
);
6648 p
= XPROCESS (process
);
6650 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6652 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6653 Fcheck_coding_system (decoding
);
6654 Fcheck_coding_system (encoding
);
6655 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6656 p
->decode_coding_system
= decoding
;
6657 p
->encode_coding_system
= encoding
;
6658 setup_process_coding_systems (process
);
6663 DEFUN ("process-coding-system",
6664 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6665 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6666 (register Lisp_Object process
)
6668 CHECK_PROCESS (process
);
6669 return Fcons (XPROCESS (process
)->decode_coding_system
,
6670 XPROCESS (process
)->encode_coding_system
);
6673 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6674 Sset_process_filter_multibyte
, 2, 2, 0,
6675 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6676 If FLAG is non-nil, the filter is given multibyte strings.
6677 If FLAG is nil, the filter is given unibyte strings. In this case,
6678 all character code conversion except for end-of-line conversion is
6680 (Lisp_Object process
, Lisp_Object flag
)
6682 register struct Lisp_Process
*p
;
6684 CHECK_PROCESS (process
);
6685 p
= XPROCESS (process
);
6687 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6688 setup_process_coding_systems (process
);
6693 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6694 Sprocess_filter_multibyte_p
, 1, 1, 0,
6695 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6696 (Lisp_Object process
)
6698 register struct Lisp_Process
*p
;
6699 struct coding_system
*coding
;
6701 CHECK_PROCESS (process
);
6702 p
= XPROCESS (process
);
6703 coding
= proc_decode_coding_system
[p
->infd
];
6704 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6713 add_gpm_wait_descriptor (int desc
)
6715 add_keyboard_wait_descriptor (desc
);
6719 delete_gpm_wait_descriptor (int desc
)
6721 delete_keyboard_wait_descriptor (desc
);
6728 /* Return nonzero if *MASK has a bit set
6729 that corresponds to one of the keyboard input descriptors. */
6732 keyboard_bit_set (fd_set
*mask
)
6736 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6737 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6738 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6745 #else /* not subprocesses */
6747 /* Defined on msdos.c. */
6748 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6751 /* Implementation of wait_reading_process_output, assuming that there
6752 are no subprocesses. Used only by the MS-DOS build.
6754 Wait for timeout to elapse and/or keyboard input to be available.
6757 timeout in seconds, or
6758 zero for no limit, or
6759 -1 means gobble data immediately available but don't wait for any.
6761 read_kbd is a Lisp_Object:
6762 0 to ignore keyboard input, or
6763 1 to return when input is available, or
6764 -1 means caller will actually read the input, so don't throw to
6767 see full version for other parameters. We know that wait_proc will
6768 always be NULL, since `subprocesses' isn't defined.
6770 do_display != 0 means redisplay should be done to show subprocess
6771 output that arrives.
6773 Return true if we received input from any process. */
6776 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6778 Lisp_Object wait_for_cell
,
6779 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6782 EMACS_TIME end_time
, timeout
;
6783 SELECT_TYPE waitchannels
;
6786 /* What does time_limit really mean? */
6787 if (time_limit
|| microsecs
)
6789 EMACS_GET_TIME (end_time
);
6790 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6791 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6794 /* Turn off periodic alarms (in case they are in use)
6795 and then turn off any other atimers,
6796 because the select emulator uses alarms. */
6798 turn_on_atimers (0);
6802 int timeout_reduced_for_timers
= 0;
6804 /* If calling from keyboard input, do not quit
6805 since we want to return C-g as an input character.
6806 Otherwise, do pending quit if requested. */
6810 /* Exit now if the cell we're waiting for became non-nil. */
6811 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6814 /* Compute time from now till when time limit is up */
6815 /* Exit if already run out */
6816 if (time_limit
== -1)
6818 /* -1 specified for timeout means
6819 gobble output available now
6820 but don't wait at all. */
6822 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6824 else if (time_limit
|| microsecs
)
6826 EMACS_GET_TIME (timeout
);
6827 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6828 if (EMACS_TIME_NEG_P (timeout
))
6833 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6836 /* If our caller will not immediately handle keyboard events,
6837 run timer events directly.
6838 (Callers that will immediately read keyboard events
6839 call timer_delay on their own.) */
6840 if (NILP (wait_for_cell
))
6842 EMACS_TIME timer_delay
;
6846 int old_timers_run
= timers_run
;
6847 timer_delay
= timer_check ();
6848 if (timers_run
!= old_timers_run
&& do_display
)
6849 /* We must retry, since a timer may have requeued itself
6850 and that could alter the time delay. */
6851 redisplay_preserve_echo_area (14);
6855 while (!detect_input_pending ());
6857 /* If there is unread keyboard input, also return. */
6859 && requeued_events_pending_p ())
6862 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6864 EMACS_TIME difference
;
6865 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6866 if (EMACS_TIME_NEG_P (difference
))
6868 timeout
= timer_delay
;
6869 timeout_reduced_for_timers
= 1;
6874 /* Cause C-g and alarm signals to take immediate action,
6875 and cause input available signals to zero out timeout. */
6877 set_waiting_for_input (&timeout
);
6879 /* Wait till there is something to do. */
6881 if (! read_kbd
&& NILP (wait_for_cell
))
6882 FD_ZERO (&waitchannels
);
6884 FD_SET (0, &waitchannels
);
6886 /* If a frame has been newly mapped and needs updating,
6887 reprocess its display stuff. */
6888 if (frame_garbaged
&& do_display
)
6890 clear_waiting_for_input ();
6891 redisplay_preserve_echo_area (15);
6893 set_waiting_for_input (&timeout
);
6896 if (read_kbd
&& detect_input_pending ())
6899 FD_ZERO (&waitchannels
);
6902 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6907 /* Make C-g and alarm signals set flags again */
6908 clear_waiting_for_input ();
6910 /* If we woke up due to SIGWINCH, actually change size now. */
6911 do_pending_window_change (0);
6913 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6914 /* We waited the full specified time, so return now. */
6919 /* If the system call was interrupted, then go around the
6921 if (xerrno
== EINTR
)
6922 FD_ZERO (&waitchannels
);
6924 error ("select error: %s", emacs_strerror (xerrno
));
6927 /* Check for keyboard input */
6930 && detect_input_pending_run_timers (do_display
))
6932 swallow_events (do_display
);
6933 if (detect_input_pending_run_timers (do_display
))
6937 /* If there is unread keyboard input, also return. */
6939 && requeued_events_pending_p ())
6942 /* If wait_for_cell. check for keyboard input
6943 but don't run any timers.
6944 ??? (It seems wrong to me to check for keyboard
6945 input at all when wait_for_cell, but the code
6946 has been this way since July 1994.
6947 Try changing this after version 19.31.) */
6948 if (! NILP (wait_for_cell
)
6949 && detect_input_pending ())
6951 swallow_events (do_display
);
6952 if (detect_input_pending ())
6956 /* Exit now if the cell we're waiting for became non-nil. */
6957 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6966 #endif /* not subprocesses */
6968 /* The following functions are needed even if async subprocesses are
6969 not supported. Some of them are no-op stubs in that case. */
6971 /* Add DESC to the set of keyboard input descriptors. */
6974 add_keyboard_wait_descriptor (int desc
)
6976 #ifdef subprocesses /* actually means "not MSDOS" */
6977 FD_SET (desc
, &input_wait_mask
);
6978 FD_SET (desc
, &non_process_wait_mask
);
6979 if (desc
> max_input_desc
)
6980 max_input_desc
= desc
;
6984 /* From now on, do not expect DESC to give keyboard input. */
6987 delete_keyboard_wait_descriptor (int desc
)
6991 int lim
= max_input_desc
;
6993 FD_CLR (desc
, &input_wait_mask
);
6994 FD_CLR (desc
, &non_process_wait_mask
);
6996 if (desc
== max_input_desc
)
6997 for (fd
= 0; fd
< lim
; fd
++)
6998 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
6999 max_input_desc
= fd
;
7003 /* Setup coding systems of PROCESS. */
7006 setup_process_coding_systems (Lisp_Object process
)
7009 struct Lisp_Process
*p
= XPROCESS (process
);
7011 int outch
= p
->outfd
;
7012 Lisp_Object coding_system
;
7014 if (inch
< 0 || outch
< 0)
7017 if (!proc_decode_coding_system
[inch
])
7018 proc_decode_coding_system
[inch
]
7019 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7020 coding_system
= p
->decode_coding_system
;
7021 if (! NILP (p
->filter
))
7023 else if (BUFFERP (p
->buffer
))
7025 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7026 coding_system
= raw_text_coding_system (coding_system
);
7028 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7030 if (!proc_encode_coding_system
[outch
])
7031 proc_encode_coding_system
[outch
]
7032 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7033 setup_coding_system (p
->encode_coding_system
,
7034 proc_encode_coding_system
[outch
]);
7038 /* Close all descriptors currently in use for communication
7039 with subprocess. This is used in a newly-forked subprocess
7040 to get rid of irrelevant descriptors. */
7043 close_process_descs (void)
7047 for (i
= 0; i
< MAXDESC
; i
++)
7049 Lisp_Object process
;
7050 process
= chan_process
[i
];
7051 if (!NILP (process
))
7053 int in
= XPROCESS (process
)->infd
;
7054 int out
= XPROCESS (process
)->outfd
;
7057 if (out
>= 0 && in
!= out
)
7064 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7065 doc
: /* Return the (or a) process associated with BUFFER.
7066 BUFFER may be a buffer or the name of one. */)
7067 (register Lisp_Object buffer
)
7070 register Lisp_Object buf
, tail
, proc
;
7072 if (NILP (buffer
)) return Qnil
;
7073 buf
= Fget_buffer (buffer
);
7074 if (NILP (buf
)) return Qnil
;
7076 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7078 proc
= Fcdr (XCAR (tail
));
7079 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7082 #endif /* subprocesses */
7086 DEFUN ("process-inherit-coding-system-flag",
7087 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7089 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7090 If this flag is t, `buffer-file-coding-system' of the buffer
7091 associated with PROCESS will inherit the coding system used to decode
7092 the process output. */)
7093 (register Lisp_Object process
)
7096 CHECK_PROCESS (process
);
7097 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7099 /* Ignore the argument and return the value of
7100 inherit-process-coding-system. */
7101 return inherit_process_coding_system
? Qt
: Qnil
;
7105 /* Kill all processes associated with `buffer'.
7106 If `buffer' is nil, kill all processes */
7109 kill_buffer_processes (Lisp_Object buffer
)
7112 Lisp_Object tail
, proc
;
7114 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7116 proc
= XCDR (XCAR (tail
));
7118 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7120 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7121 Fdelete_process (proc
);
7122 else if (XPROCESS (proc
)->infd
>= 0)
7123 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7126 #else /* subprocesses */
7127 /* Since we have no subprocesses, this does nothing. */
7128 #endif /* subprocesses */
7131 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7132 Swaiting_for_user_input_p
, 0, 0, 0,
7133 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7134 This is intended for use by asynchronous process output filters and sentinels. */)
7138 return (waiting_for_user_input_p
? Qt
: Qnil
);
7144 /* Stop reading input from keyboard sources. */
7147 hold_keyboard_input (void)
7152 /* Resume reading input from keyboard sources. */
7155 unhold_keyboard_input (void)
7160 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7163 kbd_on_hold_p (void)
7165 return kbd_is_on_hold
;
7169 /* Enumeration of and access to system processes a-la ps(1). */
7171 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7173 doc
: /* Return a list of numerical process IDs of all running processes.
7174 If this functionality is unsupported, return nil.
7176 See `process-attributes' for getting attributes of a process given its ID. */)
7179 return list_system_processes ();
7182 DEFUN ("process-attributes", Fprocess_attributes
,
7183 Sprocess_attributes
, 1, 1, 0,
7184 doc
: /* Return attributes of the process given by its PID, a number.
7186 Value is an alist where each element is a cons cell of the form
7190 If this functionality is unsupported, the value is nil.
7192 See `list-system-processes' for getting a list of all process IDs.
7194 The KEYs of the attributes that this function may return are listed
7195 below, together with the type of the associated VALUE (in parentheses).
7196 Not all platforms support all of these attributes; unsupported
7197 attributes will not appear in the returned alist.
7198 Unless explicitly indicated otherwise, numbers can have either
7199 integer or floating point values.
7201 euid -- Effective user User ID of the process (number)
7202 user -- User name corresponding to euid (string)
7203 egid -- Effective user Group ID of the process (number)
7204 group -- Group name corresponding to egid (string)
7205 comm -- Command name (executable name only) (string)
7206 state -- Process state code, such as "S", "R", or "T" (string)
7207 ppid -- Parent process ID (number)
7208 pgrp -- Process group ID (number)
7209 sess -- Session ID, i.e. process ID of session leader (number)
7210 ttname -- Controlling tty name (string)
7211 tpgid -- ID of foreground process group on the process's tty (number)
7212 minflt -- number of minor page faults (number)
7213 majflt -- number of major page faults (number)
7214 cminflt -- cumulative number of minor page faults (number)
7215 cmajflt -- cumulative number of major page faults (number)
7216 utime -- user time used by the process, in the (HIGH LOW USEC) format
7217 stime -- system time used by the process, in the (HIGH LOW USEC) format
7218 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7219 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7220 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7221 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7222 pri -- priority of the process (number)
7223 nice -- nice value of the process (number)
7224 thcount -- process thread count (number)
7225 start -- time the process started, in the (HIGH LOW USEC) format
7226 vsize -- virtual memory size of the process in KB's (number)
7227 rss -- resident set size of the process in KB's (number)
7228 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7229 pcpu -- percents of CPU time used by the process (floating-point number)
7230 pmem -- percents of total physical memory used by process's resident set
7231 (floating-point number)
7232 args -- command line which invoked the process (string). */)
7235 return system_process_attributes (pid
);
7245 inhibit_sentinels
= 0;
7249 if (! noninteractive
|| initialized
)
7251 signal (SIGCHLD
, sigchld_handler
);
7254 FD_ZERO (&input_wait_mask
);
7255 FD_ZERO (&non_keyboard_wait_mask
);
7256 FD_ZERO (&non_process_wait_mask
);
7257 FD_ZERO (&write_mask
);
7258 max_process_desc
= 0;
7259 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7261 #ifdef NON_BLOCKING_CONNECT
7262 FD_ZERO (&connect_wait_mask
);
7263 num_pending_connects
= 0;
7266 #ifdef ADAPTIVE_READ_BUFFERING
7267 process_output_delay_count
= 0;
7268 process_output_skip
= 0;
7271 /* Don't do this, it caused infinite select loops. The display
7272 method should call add_keyboard_wait_descriptor on stdin if it
7275 FD_SET (0, &input_wait_mask
);
7278 Vprocess_alist
= Qnil
;
7280 deleted_pid_list
= Qnil
;
7282 for (i
= 0; i
< MAXDESC
; i
++)
7284 chan_process
[i
] = Qnil
;
7285 proc_buffered_char
[i
] = -1;
7287 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7288 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7289 #ifdef DATAGRAM_SOCKETS
7290 memset (datagram_address
, 0, sizeof datagram_address
);
7294 Lisp_Object subfeatures
= Qnil
;
7295 const struct socket_options
*sopt
;
7297 #define ADD_SUBFEATURE(key, val) \
7298 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7300 #ifdef NON_BLOCKING_CONNECT
7301 ADD_SUBFEATURE (QCnowait
, Qt
);
7303 #ifdef DATAGRAM_SOCKETS
7304 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7306 #ifdef HAVE_SEQPACKET
7307 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7309 #ifdef HAVE_LOCAL_SOCKETS
7310 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7312 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7314 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7316 #ifdef HAVE_GETSOCKNAME
7317 ADD_SUBFEATURE (QCservice
, Qt
);
7319 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7320 ADD_SUBFEATURE (QCserver
, Qt
);
7323 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7324 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7326 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7329 #if defined (DARWIN_OS)
7330 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7331 processes. As such, we only change the default value. */
7334 char const *release
= (STRINGP (Voperating_system_release
)
7335 ? SSDATA (Voperating_system_release
)
7337 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7338 && release
[1] == '.')) {
7339 Vprocess_connection_type
= Qnil
;
7343 #endif /* subprocesses */
7348 syms_of_process (void)
7352 DEFSYM (Qprocessp
, "processp");
7353 DEFSYM (Qrun
, "run");
7354 DEFSYM (Qstop
, "stop");
7355 DEFSYM (Qsignal
, "signal");
7357 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7360 Qexit = intern_c_string ("exit");
7361 staticpro (&Qexit); */
7363 DEFSYM (Qopen
, "open");
7364 DEFSYM (Qclosed
, "closed");
7365 DEFSYM (Qconnect
, "connect");
7366 DEFSYM (Qfailed
, "failed");
7367 DEFSYM (Qlisten
, "listen");
7368 DEFSYM (Qlocal
, "local");
7369 DEFSYM (Qipv4
, "ipv4");
7371 DEFSYM (Qipv6
, "ipv6");
7373 DEFSYM (Qdatagram
, "datagram");
7374 DEFSYM (Qseqpacket
, "seqpacket");
7376 DEFSYM (QCport
, ":port");
7377 DEFSYM (QCspeed
, ":speed");
7378 DEFSYM (QCprocess
, ":process");
7380 DEFSYM (QCbytesize
, ":bytesize");
7381 DEFSYM (QCstopbits
, ":stopbits");
7382 DEFSYM (QCparity
, ":parity");
7383 DEFSYM (Qodd
, "odd");
7384 DEFSYM (Qeven
, "even");
7385 DEFSYM (QCflowcontrol
, ":flowcontrol");
7388 DEFSYM (QCsummary
, ":summary");
7390 DEFSYM (Qreal
, "real");
7391 DEFSYM (Qnetwork
, "network");
7392 DEFSYM (Qserial
, "serial");
7393 DEFSYM (QCbuffer
, ":buffer");
7394 DEFSYM (QChost
, ":host");
7395 DEFSYM (QCservice
, ":service");
7396 DEFSYM (QClocal
, ":local");
7397 DEFSYM (QCremote
, ":remote");
7398 DEFSYM (QCcoding
, ":coding");
7399 DEFSYM (QCserver
, ":server");
7400 DEFSYM (QCnowait
, ":nowait");
7401 DEFSYM (QCsentinel
, ":sentinel");
7402 DEFSYM (QClog
, ":log");
7403 DEFSYM (QCnoquery
, ":noquery");
7404 DEFSYM (QCstop
, ":stop");
7405 DEFSYM (QCoptions
, ":options");
7406 DEFSYM (QCplist
, ":plist");
7408 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7410 staticpro (&Vprocess_alist
);
7412 staticpro (&deleted_pid_list
);
7415 #endif /* subprocesses */
7417 DEFSYM (QCname
, ":name");
7418 DEFSYM (QCtype
, ":type");
7420 DEFSYM (Qeuid
, "euid");
7421 DEFSYM (Qegid
, "egid");
7422 DEFSYM (Quser
, "user");
7423 DEFSYM (Qgroup
, "group");
7424 DEFSYM (Qcomm
, "comm");
7425 DEFSYM (Qstate
, "state");
7426 DEFSYM (Qppid
, "ppid");
7427 DEFSYM (Qpgrp
, "pgrp");
7428 DEFSYM (Qsess
, "sess");
7429 DEFSYM (Qttname
, "ttname");
7430 DEFSYM (Qtpgid
, "tpgid");
7431 DEFSYM (Qminflt
, "minflt");
7432 DEFSYM (Qmajflt
, "majflt");
7433 DEFSYM (Qcminflt
, "cminflt");
7434 DEFSYM (Qcmajflt
, "cmajflt");
7435 DEFSYM (Qutime
, "utime");
7436 DEFSYM (Qstime
, "stime");
7437 DEFSYM (Qtime
, "time");
7438 DEFSYM (Qcutime
, "cutime");
7439 DEFSYM (Qcstime
, "cstime");
7440 DEFSYM (Qctime
, "ctime");
7441 DEFSYM (Qpri
, "pri");
7442 DEFSYM (Qnice
, "nice");
7443 DEFSYM (Qthcount
, "thcount");
7444 DEFSYM (Qstart
, "start");
7445 DEFSYM (Qvsize
, "vsize");
7446 DEFSYM (Qrss
, "rss");
7447 DEFSYM (Qetime
, "etime");
7448 DEFSYM (Qpcpu
, "pcpu");
7449 DEFSYM (Qpmem
, "pmem");
7450 DEFSYM (Qargs
, "args");
7452 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7453 doc
: /* Non-nil means delete processes immediately when they exit.
7454 A value of nil means don't delete them until `list-processes' is run. */);
7456 delete_exited_processes
= 1;
7459 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7460 doc
: /* Control type of device used to communicate with subprocesses.
7461 Values are nil to use a pipe, or t or `pty' to use a pty.
7462 The value has no effect if the system has no ptys or if all ptys are busy:
7463 then a pipe is used in any case.
7464 The value takes effect when `start-process' is called. */);
7465 Vprocess_connection_type
= Qt
;
7467 #ifdef ADAPTIVE_READ_BUFFERING
7468 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7469 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7470 On some systems, when Emacs reads the output from a subprocess, the output data
7471 is read in very small blocks, potentially resulting in very poor performance.
7472 This behavior can be remedied to some extent by setting this variable to a
7473 non-nil value, as it will automatically delay reading from such processes, to
7474 allow them to produce more output before Emacs tries to read it.
7475 If the value is t, the delay is reset after each write to the process; any other
7476 non-nil value means that the delay is not reset on write.
7477 The variable takes effect when `start-process' is called. */);
7478 Vprocess_adaptive_read_buffering
= Qt
;
7481 defsubr (&Sprocessp
);
7482 defsubr (&Sget_process
);
7483 defsubr (&Sdelete_process
);
7484 defsubr (&Sprocess_status
);
7485 defsubr (&Sprocess_exit_status
);
7486 defsubr (&Sprocess_id
);
7487 defsubr (&Sprocess_name
);
7488 defsubr (&Sprocess_tty_name
);
7489 defsubr (&Sprocess_command
);
7490 defsubr (&Sset_process_buffer
);
7491 defsubr (&Sprocess_buffer
);
7492 defsubr (&Sprocess_mark
);
7493 defsubr (&Sset_process_filter
);
7494 defsubr (&Sprocess_filter
);
7495 defsubr (&Sset_process_sentinel
);
7496 defsubr (&Sprocess_sentinel
);
7497 defsubr (&Sset_process_window_size
);
7498 defsubr (&Sset_process_inherit_coding_system_flag
);
7499 defsubr (&Sset_process_query_on_exit_flag
);
7500 defsubr (&Sprocess_query_on_exit_flag
);
7501 defsubr (&Sprocess_contact
);
7502 defsubr (&Sprocess_plist
);
7503 defsubr (&Sset_process_plist
);
7504 defsubr (&Sprocess_list
);
7505 defsubr (&Sstart_process
);
7506 defsubr (&Sserial_process_configure
);
7507 defsubr (&Smake_serial_process
);
7508 defsubr (&Sset_network_process_option
);
7509 defsubr (&Smake_network_process
);
7510 defsubr (&Sformat_network_address
);
7511 #if defined (HAVE_NET_IF_H)
7513 defsubr (&Snetwork_interface_list
);
7515 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7516 defsubr (&Snetwork_interface_info
);
7518 #endif /* defined (HAVE_NET_IF_H) */
7519 #ifdef DATAGRAM_SOCKETS
7520 defsubr (&Sprocess_datagram_address
);
7521 defsubr (&Sset_process_datagram_address
);
7523 defsubr (&Saccept_process_output
);
7524 defsubr (&Sprocess_send_region
);
7525 defsubr (&Sprocess_send_string
);
7526 defsubr (&Sinterrupt_process
);
7527 defsubr (&Skill_process
);
7528 defsubr (&Squit_process
);
7529 defsubr (&Sstop_process
);
7530 defsubr (&Scontinue_process
);
7531 defsubr (&Sprocess_running_child_p
);
7532 defsubr (&Sprocess_send_eof
);
7533 defsubr (&Ssignal_process
);
7534 defsubr (&Swaiting_for_user_input_p
);
7535 defsubr (&Sprocess_type
);
7536 defsubr (&Sset_process_coding_system
);
7537 defsubr (&Sprocess_coding_system
);
7538 defsubr (&Sset_process_filter_multibyte
);
7539 defsubr (&Sprocess_filter_multibyte_p
);
7541 #endif /* subprocesses */
7543 defsubr (&Sget_buffer_process
);
7544 defsubr (&Sprocess_inherit_coding_system_flag
);
7545 defsubr (&Slist_system_processes
);
7546 defsubr (&Sprocess_attributes
);