1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2012
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
37 /* Only MS-DOS does not define `subprocesses'. */
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
45 /* Are local (unix) sockets supported? */
46 #if defined (HAVE_SYS_UN_H)
47 #if !defined (AF_LOCAL) && defined (AF_UNIX)
48 #define AF_LOCAL AF_UNIX
51 #define HAVE_LOCAL_SOCKETS
56 #include <sys/ioctl.h>
57 #if defined (HAVE_NET_IF_H)
59 #endif /* HAVE_NET_IF_H */
61 #if defined (HAVE_IFADDRS_H)
62 /* Must be after net/if.h */
65 /* We only use structs from this header when we use getifaddrs. */
66 #if defined (HAVE_NET_IF_DL_H)
67 #include <net/if_dl.h>
77 #include <netinet/in.h>
78 #include <arpa/nameser.h>
90 #endif /* subprocesses */
96 #include "character.h"
101 #include "termhooks.h"
102 #include "termopts.h"
103 #include "commands.h"
104 #include "keyboard.h"
105 #include "blockinput.h"
106 #include "dispextern.h"
107 #include "composite.h"
109 #include "sysselect.h"
110 #include "syssignal.h"
116 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
117 #include "xgselect.h"
123 /* Work around GCC 4.7.0 bug with strict overflow checking; see
124 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
125 These lines can be removed once the GCC bug is fixed. */
126 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
127 # pragma GCC diagnostic ignored "-Wstrict-overflow"
130 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
131 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
132 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
133 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
134 Lisp_Object QCname
, QCtype
;
136 /* Non-zero if keyboard input is on hold, zero otherwise. */
138 static int kbd_is_on_hold
;
140 /* Nonzero means don't run process sentinels. This is used
142 int inhibit_sentinels
;
146 Lisp_Object Qprocessp
;
147 static Lisp_Object Qrun
, Qstop
, Qsignal
;
148 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
150 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
151 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
153 static Lisp_Object Qipv6
;
155 static Lisp_Object QCport
, QCprocess
;
157 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
158 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
159 static Lisp_Object QCbuffer
, QChost
, QCservice
;
160 static Lisp_Object QClocal
, QCremote
, QCcoding
;
161 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
162 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
163 static Lisp_Object Qlast_nonmenu_event
;
164 /* QCfamily is declared and initialized in xfaces.c,
165 QCfilter in keyboard.c. */
166 extern Lisp_Object QCfamily
, QCfilter
;
168 /* Qexit is declared and initialized in eval.c. */
170 /* QCfamily is defined in xfaces.c. */
171 extern Lisp_Object QCfamily
;
172 /* QCfilter is defined in keyboard.c. */
173 extern Lisp_Object QCfilter
;
175 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
176 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
177 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
178 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
184 /* Number of events of change of status of a process. */
185 static EMACS_INT process_tick
;
186 /* Number of events for which the user or sentinel has been notified. */
187 static EMACS_INT update_tick
;
189 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
191 /* Only W32 has this, it really means that select can't take write mask. */
192 #ifdef BROKEN_NON_BLOCKING_CONNECT
193 #undef NON_BLOCKING_CONNECT
194 #define SELECT_CANT_DO_WRITE_MASK
196 #ifndef NON_BLOCKING_CONNECT
198 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
199 #if defined (O_NONBLOCK) || defined (O_NDELAY)
200 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
201 #define NON_BLOCKING_CONNECT
202 #endif /* EWOULDBLOCK || EINPROGRESS */
203 #endif /* O_NONBLOCK || O_NDELAY */
204 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
205 #endif /* HAVE_SELECT */
206 #endif /* NON_BLOCKING_CONNECT */
207 #endif /* BROKEN_NON_BLOCKING_CONNECT */
209 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
210 this system. We need to read full packets, so we need a
211 "non-destructive" select. So we require either native select,
212 or emulation of select using FIONREAD. */
214 #ifdef BROKEN_DATAGRAM_SOCKETS
215 #undef DATAGRAM_SOCKETS
217 #ifndef DATAGRAM_SOCKETS
218 #if defined (HAVE_SELECT) || defined (FIONREAD)
219 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
220 #define DATAGRAM_SOCKETS
221 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
222 #endif /* HAVE_SELECT || FIONREAD */
223 #endif /* DATAGRAM_SOCKETS */
224 #endif /* BROKEN_DATAGRAM_SOCKETS */
226 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
227 # define HAVE_SEQPACKET
230 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
231 #define ADAPTIVE_READ_BUFFERING
234 #ifdef ADAPTIVE_READ_BUFFERING
235 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
236 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
237 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
239 /* Number of processes which have a non-zero read_output_delay,
240 and therefore might be delayed for adaptive read buffering. */
242 static int process_output_delay_count
;
244 /* Non-zero if any process has non-nil read_output_skip. */
246 static int process_output_skip
;
249 #define process_output_delay_count 0
252 static void create_process (Lisp_Object
, char **, Lisp_Object
);
254 static int keyboard_bit_set (SELECT_TYPE
*);
256 static void deactivate_process (Lisp_Object
);
257 static void status_notify (struct Lisp_Process
*);
258 static int read_process_output (Lisp_Object
, int);
259 static void create_pty (Lisp_Object
);
261 /* If we support a window system, turn on the code to poll periodically
262 to detect C-g. It isn't actually used when doing interrupt input. */
263 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
264 #define POLL_FOR_INPUT
267 static Lisp_Object
get_process (register Lisp_Object name
);
268 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
270 /* Mask of bits indicating the descriptors that we wait for input on. */
272 static SELECT_TYPE input_wait_mask
;
274 /* Mask that excludes keyboard input descriptor(s). */
276 static SELECT_TYPE non_keyboard_wait_mask
;
278 /* Mask that excludes process input descriptor(s). */
280 static SELECT_TYPE non_process_wait_mask
;
282 /* Mask for selecting for write. */
284 static SELECT_TYPE write_mask
;
286 #ifdef NON_BLOCKING_CONNECT
287 /* Mask of bits indicating the descriptors that we wait for connect to
288 complete on. Once they complete, they are removed from this mask
289 and added to the input_wait_mask and non_keyboard_wait_mask. */
291 static SELECT_TYPE connect_wait_mask
;
293 /* Number of bits set in connect_wait_mask. */
294 static int num_pending_connects
;
295 #endif /* NON_BLOCKING_CONNECT */
297 /* The largest descriptor currently in use for a process object. */
298 static int max_process_desc
;
300 /* The largest descriptor currently in use for input. */
301 static int max_input_desc
;
303 /* Indexed by descriptor, gives the process (if any) for that descriptor */
304 static Lisp_Object chan_process
[MAXDESC
];
306 /* Alist of elements (NAME . PROCESS) */
307 static Lisp_Object Vprocess_alist
;
309 /* Buffered-ahead input char from process, indexed by channel.
310 -1 means empty (no char is buffered).
311 Used on sys V where the only way to tell if there is any
312 output from the process is to read at least one char.
313 Always -1 on systems that support FIONREAD. */
315 static int proc_buffered_char
[MAXDESC
];
317 /* Table of `struct coding-system' for each process. */
318 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
319 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
321 #ifdef DATAGRAM_SOCKETS
322 /* Table of `partner address' for datagram sockets. */
323 static struct sockaddr_and_len
{
326 } datagram_address
[MAXDESC
];
327 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
328 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
330 #define DATAGRAM_CHAN_P(chan) (0)
331 #define DATAGRAM_CONN_P(proc) (0)
334 /* Maximum number of bytes to send to a pty without an eof. */
335 static int pty_max_bytes
;
339 static struct fd_callback_data
345 int condition
; /* mask of the defines above. */
346 } fd_callback_info
[MAXDESC
];
349 /* Add a file descriptor FD to be monitored for when read is possible.
350 When read is possible, call FUNC with argument DATA. */
353 add_read_fd (int fd
, fd_callback func
, void *data
)
355 eassert (fd
< MAXDESC
);
356 add_keyboard_wait_descriptor (fd
);
358 fd_callback_info
[fd
].func
= func
;
359 fd_callback_info
[fd
].data
= data
;
360 fd_callback_info
[fd
].condition
|= FOR_READ
;
363 /* Stop monitoring file descriptor FD for when read is possible. */
366 delete_read_fd (int fd
)
368 eassert (fd
< MAXDESC
);
369 delete_keyboard_wait_descriptor (fd
);
371 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
372 if (fd_callback_info
[fd
].condition
== 0)
374 fd_callback_info
[fd
].func
= 0;
375 fd_callback_info
[fd
].data
= 0;
379 /* Add a file descriptor FD to be monitored for when write is possible.
380 When write is possible, call FUNC with argument DATA. */
383 add_write_fd (int fd
, fd_callback func
, void *data
)
385 eassert (fd
< MAXDESC
);
386 FD_SET (fd
, &write_mask
);
387 if (fd
> max_input_desc
)
390 fd_callback_info
[fd
].func
= func
;
391 fd_callback_info
[fd
].data
= data
;
392 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
395 /* Stop monitoring file descriptor FD for when write is possible. */
398 delete_write_fd (int fd
)
400 int lim
= max_input_desc
;
402 eassert (fd
< MAXDESC
);
403 FD_CLR (fd
, &write_mask
);
404 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
405 if (fd_callback_info
[fd
].condition
== 0)
407 fd_callback_info
[fd
].func
= 0;
408 fd_callback_info
[fd
].data
= 0;
410 if (fd
== max_input_desc
)
411 for (fd
= lim
; fd
>= 0; fd
--)
412 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
422 /* Compute the Lisp form of the process status, p->status, from
423 the numeric status that was returned by `wait'. */
425 static Lisp_Object
status_convert (int);
428 update_status (struct Lisp_Process
*p
)
430 eassert (p
->raw_status_new
);
431 PSET (p
, status
, status_convert (p
->raw_status
));
432 p
->raw_status_new
= 0;
435 /* Convert a process status word in Unix format to
436 the list that we use internally. */
439 status_convert (int w
)
442 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
443 else if (WIFEXITED (w
))
444 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
445 WCOREDUMP (w
) ? Qt
: Qnil
));
446 else if (WIFSIGNALED (w
))
447 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
448 WCOREDUMP (w
) ? Qt
: Qnil
));
453 /* Given a status-list, extract the three pieces of information
454 and store them individually through the three pointers. */
457 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
471 *code
= XFASTINT (XCAR (tem
));
473 *coredump
= !NILP (tem
);
477 /* Return a string describing a process status list. */
480 status_message (struct Lisp_Process
*p
)
482 Lisp_Object status
= p
->status
;
485 Lisp_Object string
, string2
;
487 decode_status (status
, &symbol
, &code
, &coredump
);
489 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
492 synchronize_system_messages_locale ();
493 signame
= strsignal (code
);
495 string
= build_string ("unknown");
500 string
= build_unibyte_string (signame
);
501 if (! NILP (Vlocale_coding_system
))
502 string
= (code_convert_string_norecord
503 (string
, Vlocale_coding_system
, 0));
504 c1
= STRING_CHAR (SDATA (string
));
507 Faset (string
, make_number (0), make_number (c2
));
509 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
510 return concat2 (string
, string2
);
512 else if (EQ (symbol
, Qexit
))
515 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
517 return build_string ("finished\n");
518 string
= Fnumber_to_string (make_number (code
));
519 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
520 return concat3 (build_string ("exited abnormally with code "),
523 else if (EQ (symbol
, Qfailed
))
525 string
= Fnumber_to_string (make_number (code
));
526 string2
= build_string ("\n");
527 return concat3 (build_string ("failed with code "),
531 return Fcopy_sequence (Fsymbol_name (symbol
));
536 /* The file name of the pty opened by allocate_pty. */
537 static char pty_name
[24];
539 /* Open an available pty, returning a file descriptor.
540 Return -1 on failure.
541 The file name of the terminal corresponding to the pty
542 is left in the variable pty_name. */
553 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
554 for (i
= 0; i
< 16; i
++)
557 #ifdef PTY_NAME_SPRINTF
560 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
561 #endif /* no PTY_NAME_SPRINTF */
565 #else /* no PTY_OPEN */
567 { /* Some systems name their pseudoterminals so that there are gaps in
568 the usual sequence - for example, on HP9000/S700 systems, there
569 are no pseudoterminals with names ending in 'f'. So we wait for
570 three failures in a row before deciding that we've reached the
572 int failed_count
= 0;
575 if (stat (pty_name
, &stb
) < 0)
578 if (failed_count
>= 3)
585 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
587 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
590 #endif /* no PTY_OPEN */
594 /* check to make certain that both sides are available
595 this avoids a nasty yet stupid bug in rlogins */
596 #ifdef PTY_TTY_NAME_SPRINTF
599 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
600 #endif /* no PTY_TTY_NAME_SPRINTF */
601 if (access (pty_name
, 6) != 0)
616 #endif /* HAVE_PTYS */
619 make_process (Lisp_Object name
)
621 register Lisp_Object val
, tem
, name1
;
622 register struct Lisp_Process
*p
;
623 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
626 p
= allocate_process ();
627 /* Initialize Lisp data. Note that allocate_process initializes all
628 Lisp data to nil, so do it only for slots which should not be nil. */
629 PSET (p
, status
, Qrun
);
630 PSET (p
, mark
, Fmake_marker ());
632 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
633 non-Lisp data, so do it only for slots which should not be zero. */
638 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
641 /* If name is already in use, modify it until it is unused. */
646 tem
= Fget_process (name1
);
647 if (NILP (tem
)) break;
648 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
651 PSET (p
, name
, name
);
652 XSETPROCESS (val
, p
);
653 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
658 remove_process (register Lisp_Object proc
)
660 register Lisp_Object pair
;
662 pair
= Frassq (proc
, Vprocess_alist
);
663 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
665 deactivate_process (proc
);
669 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
670 doc
: /* Return t if OBJECT is a process. */)
673 return PROCESSP (object
) ? Qt
: Qnil
;
676 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
677 doc
: /* Return the process named NAME, or nil if there is none. */)
678 (register Lisp_Object name
)
683 return Fcdr (Fassoc (name
, Vprocess_alist
));
686 /* This is how commands for the user decode process arguments. It
687 accepts a process, a process name, a buffer, a buffer name, or nil.
688 Buffers denote the first process in the buffer, and nil denotes the
692 get_process (register Lisp_Object name
)
694 register Lisp_Object proc
, obj
;
697 obj
= Fget_process (name
);
699 obj
= Fget_buffer (name
);
701 error ("Process %s does not exist", SDATA (name
));
703 else if (NILP (name
))
704 obj
= Fcurrent_buffer ();
708 /* Now obj should be either a buffer object or a process object.
712 proc
= Fget_buffer_process (obj
);
714 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
726 /* Fdelete_process promises to immediately forget about the process, but in
727 reality, Emacs needs to remember those processes until they have been
728 treated by sigchld_handler; otherwise this handler would consider the
729 process as being synchronous and say that the synchronous process is
731 static Lisp_Object deleted_pid_list
;
734 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
735 doc
: /* Delete PROCESS: kill it and forget about it immediately.
736 PROCESS may be a process, a buffer, the name of a process or buffer, or
737 nil, indicating the current buffer's process. */)
738 (register Lisp_Object process
)
740 register struct Lisp_Process
*p
;
742 process
= get_process (process
);
743 p
= XPROCESS (process
);
745 p
->raw_status_new
= 0;
746 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
748 PSET (p
, status
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
749 p
->tick
= ++process_tick
;
751 redisplay_preserve_echo_area (13);
753 else if (p
->infd
>= 0)
759 /* No problem storing the pid here, as it is still in Vprocess_alist. */
760 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
761 /* GC treated elements set to nil. */
762 Fdelq (Qnil
, deleted_pid_list
));
763 /* If the process has already signaled, remove it from the list. */
764 if (p
->raw_status_new
)
767 if (CONSP (p
->status
))
768 symbol
= XCAR (p
->status
);
769 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
771 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
775 Fkill_process (process
, Qnil
);
776 /* Do this now, since remove_process will make sigchld_handler do nothing. */
777 PSET (p
, status
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
778 p
->tick
= ++process_tick
;
780 redisplay_preserve_echo_area (13);
783 remove_process (process
);
787 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
788 doc
: /* Return the status of PROCESS.
789 The returned value is one of the following symbols:
790 run -- for a process that is running.
791 stop -- for a process stopped but continuable.
792 exit -- for a process that has exited.
793 signal -- for a process that has got a fatal signal.
794 open -- for a network stream connection that is open.
795 listen -- for a network stream server that is listening.
796 closed -- for a network stream connection that is closed.
797 connect -- when waiting for a non-blocking connection to complete.
798 failed -- when a non-blocking connection has failed.
799 nil -- if arg is a process name and no such process exists.
800 PROCESS may be a process, a buffer, the name of a process, or
801 nil, indicating the current buffer's process. */)
802 (register Lisp_Object process
)
804 register struct Lisp_Process
*p
;
805 register Lisp_Object status
;
807 if (STRINGP (process
))
808 process
= Fget_process (process
);
810 process
= get_process (process
);
815 p
= XPROCESS (process
);
816 if (p
->raw_status_new
)
820 status
= XCAR (status
);
821 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
823 if (EQ (status
, Qexit
))
825 else if (EQ (p
->command
, Qt
))
827 else if (EQ (status
, Qrun
))
833 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
835 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
836 If PROCESS has not yet exited or died, return 0. */)
837 (register Lisp_Object process
)
839 CHECK_PROCESS (process
);
840 if (XPROCESS (process
)->raw_status_new
)
841 update_status (XPROCESS (process
));
842 if (CONSP (XPROCESS (process
)->status
))
843 return XCAR (XCDR (XPROCESS (process
)->status
));
844 return make_number (0);
847 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
848 doc
: /* Return the process id of PROCESS.
849 This is the pid of the external process which PROCESS uses or talks to.
850 For a network connection, this value is nil. */)
851 (register Lisp_Object process
)
855 CHECK_PROCESS (process
);
856 pid
= XPROCESS (process
)->pid
;
857 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
860 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
861 doc
: /* Return the name of PROCESS, as a string.
862 This is the name of the program invoked in PROCESS,
863 possibly modified to make it unique among process names. */)
864 (register Lisp_Object process
)
866 CHECK_PROCESS (process
);
867 return XPROCESS (process
)->name
;
870 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
871 doc
: /* Return the command that was executed to start PROCESS.
872 This is a list of strings, the first string being the program executed
873 and the rest of the strings being the arguments given to it.
874 For a network or serial process, this is nil (process is running) or t
875 \(process is stopped). */)
876 (register Lisp_Object process
)
878 CHECK_PROCESS (process
);
879 return XPROCESS (process
)->command
;
882 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
883 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
884 This is the terminal that the process itself reads and writes on,
885 not the name of the pty that Emacs uses to talk with that terminal. */)
886 (register Lisp_Object process
)
888 CHECK_PROCESS (process
);
889 return XPROCESS (process
)->tty_name
;
892 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
894 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
896 (register Lisp_Object process
, Lisp_Object buffer
)
898 struct Lisp_Process
*p
;
900 CHECK_PROCESS (process
);
902 CHECK_BUFFER (buffer
);
903 p
= XPROCESS (process
);
904 PSET (p
, buffer
, buffer
);
905 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
906 PSET (p
, childp
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
907 setup_process_coding_systems (process
);
911 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
913 doc
: /* Return the buffer PROCESS is associated with.
914 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
915 (register Lisp_Object process
)
917 CHECK_PROCESS (process
);
918 return XPROCESS (process
)->buffer
;
921 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
923 doc
: /* Return the marker for the end of the last output from PROCESS. */)
924 (register Lisp_Object process
)
926 CHECK_PROCESS (process
);
927 return XPROCESS (process
)->mark
;
930 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
932 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
933 A value of t means stop accepting output from the process.
935 When a process has a filter, its buffer is not used for output.
936 Instead, each time it does output, the entire string of output is
937 passed to the filter.
939 The filter gets two arguments: the process and the string of output.
940 The string argument is normally a multibyte string, except:
941 - if the process' input coding system is no-conversion or raw-text,
942 it is a unibyte string (the non-converted input), or else
943 - if `default-enable-multibyte-characters' is nil, it is a unibyte
944 string (the result of converting the decoded input multibyte
945 string to unibyte with `string-make-unibyte'). */)
946 (register Lisp_Object process
, Lisp_Object filter
)
948 struct Lisp_Process
*p
;
950 CHECK_PROCESS (process
);
951 p
= XPROCESS (process
);
953 /* Don't signal an error if the process' input file descriptor
954 is closed. This could make debugging Lisp more difficult,
955 for example when doing something like
957 (setq process (start-process ...))
959 (set-process-filter process ...) */
963 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
965 FD_CLR (p
->infd
, &input_wait_mask
);
966 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
968 else if (EQ (p
->filter
, Qt
)
969 /* Network or serial process not stopped: */
970 && !EQ (p
->command
, Qt
))
972 FD_SET (p
->infd
, &input_wait_mask
);
973 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
977 PSET (p
, filter
, filter
);
978 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
979 PSET (p
, childp
, Fplist_put (p
->childp
, QCfilter
, filter
));
980 setup_process_coding_systems (process
);
984 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
986 doc
: /* Returns the filter function of PROCESS; nil if none.
987 See `set-process-filter' for more info on filter functions. */)
988 (register Lisp_Object process
)
990 CHECK_PROCESS (process
);
991 return XPROCESS (process
)->filter
;
994 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
996 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
997 The sentinel is called as a function when the process changes state.
998 It gets two arguments: the process, and a string describing the change. */)
999 (register Lisp_Object process
, Lisp_Object sentinel
)
1001 struct Lisp_Process
*p
;
1003 CHECK_PROCESS (process
);
1004 p
= XPROCESS (process
);
1006 PSET (p
, sentinel
, sentinel
);
1007 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1008 PSET (p
, childp
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1012 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1014 doc
: /* Return the sentinel of PROCESS; nil if none.
1015 See `set-process-sentinel' for more info on sentinels. */)
1016 (register Lisp_Object process
)
1018 CHECK_PROCESS (process
);
1019 return XPROCESS (process
)->sentinel
;
1022 DEFUN ("set-process-window-size", Fset_process_window_size
,
1023 Sset_process_window_size
, 3, 3, 0,
1024 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1025 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1027 CHECK_PROCESS (process
);
1028 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1029 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1031 if (XPROCESS (process
)->infd
< 0
1032 || set_window_size (XPROCESS (process
)->infd
,
1033 XINT (height
), XINT (width
)) <= 0)
1039 DEFUN ("set-process-inherit-coding-system-flag",
1040 Fset_process_inherit_coding_system_flag
,
1041 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1042 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1043 If the second argument FLAG is non-nil, then the variable
1044 `buffer-file-coding-system' of the buffer associated with PROCESS
1045 will be bound to the value of the coding system used to decode
1048 This is useful when the coding system specified for the process buffer
1049 leaves either the character code conversion or the end-of-line conversion
1050 unspecified, or if the coding system used to decode the process output
1051 is more appropriate for saving the process buffer.
1053 Binding the variable `inherit-process-coding-system' to non-nil before
1054 starting the process is an alternative way of setting the inherit flag
1055 for the process which will run.
1057 This function returns FLAG. */)
1058 (register Lisp_Object process
, Lisp_Object flag
)
1060 CHECK_PROCESS (process
);
1061 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1065 DEFUN ("set-process-query-on-exit-flag",
1066 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1068 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1069 If the second argument FLAG is non-nil, Emacs will query the user before
1070 exiting or killing a buffer if PROCESS is running. This function
1072 (register Lisp_Object process
, Lisp_Object flag
)
1074 CHECK_PROCESS (process
);
1075 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1079 DEFUN ("process-query-on-exit-flag",
1080 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1082 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1083 (register Lisp_Object process
)
1085 CHECK_PROCESS (process
);
1086 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1089 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1091 doc
: /* Return the contact info of PROCESS; t for a real child.
1092 For a network or serial connection, the value depends on the optional
1093 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1094 SERVICE) for a network connection or (PORT SPEED) for a serial
1095 connection. If KEY is t, the complete contact information for the
1096 connection is returned, else the specific value for the keyword KEY is
1097 returned. See `make-network-process' or `make-serial-process' for a
1098 list of keywords. */)
1099 (register Lisp_Object process
, Lisp_Object key
)
1101 Lisp_Object contact
;
1103 CHECK_PROCESS (process
);
1104 contact
= XPROCESS (process
)->childp
;
1106 #ifdef DATAGRAM_SOCKETS
1107 if (DATAGRAM_CONN_P (process
)
1108 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1109 contact
= Fplist_put (contact
, QCremote
,
1110 Fprocess_datagram_address (process
));
1113 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1115 if (NILP (key
) && NETCONN_P (process
))
1116 return Fcons (Fplist_get (contact
, QChost
),
1117 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1118 if (NILP (key
) && SERIALCONN_P (process
))
1119 return Fcons (Fplist_get (contact
, QCport
),
1120 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1121 return Fplist_get (contact
, key
);
1124 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1126 doc
: /* Return the plist of PROCESS. */)
1127 (register Lisp_Object process
)
1129 CHECK_PROCESS (process
);
1130 return XPROCESS (process
)->plist
;
1133 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1135 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1136 (register Lisp_Object process
, Lisp_Object plist
)
1138 CHECK_PROCESS (process
);
1141 PSET (XPROCESS (process
), plist
, plist
);
1145 #if 0 /* Turned off because we don't currently record this info
1146 in the process. Perhaps add it. */
1147 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1148 doc
: /* Return the connection type of PROCESS.
1149 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1150 a socket connection. */)
1151 (Lisp_Object process
)
1153 return XPROCESS (process
)->type
;
1157 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1158 doc
: /* Return the connection type of PROCESS.
1159 The value is either the symbol `real', `network', or `serial'.
1160 PROCESS may be a process, a buffer, the name of a process or buffer, or
1161 nil, indicating the current buffer's process. */)
1162 (Lisp_Object process
)
1165 proc
= get_process (process
);
1166 return XPROCESS (proc
)->type
;
1169 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1171 doc
: /* Convert network ADDRESS from internal format to a string.
1172 A 4 or 5 element vector represents an IPv4 address (with port number).
1173 An 8 or 9 element vector represents an IPv6 address (with port number).
1174 If optional second argument OMIT-PORT is non-nil, don't include a port
1175 number in the string, even when present in ADDRESS.
1176 Returns nil if format of ADDRESS is invalid. */)
1177 (Lisp_Object address
, Lisp_Object omit_port
)
1182 if (STRINGP (address
)) /* AF_LOCAL */
1185 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1187 register struct Lisp_Vector
*p
= XVECTOR (address
);
1188 ptrdiff_t size
= p
->header
.size
;
1189 Lisp_Object args
[10];
1192 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1194 args
[0] = build_string ("%d.%d.%d.%d");
1199 args
[0] = build_string ("%d.%d.%d.%d:%d");
1202 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1204 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1209 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1215 for (i
= 0; i
< nargs
; i
++)
1217 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1220 if (nargs
<= 5 /* IPv4 */
1221 && i
< 4 /* host, not port */
1222 && XINT (p
->contents
[i
]) > 255)
1225 args
[i
+1] = p
->contents
[i
];
1228 return Fformat (nargs
+1, args
);
1231 if (CONSP (address
))
1233 Lisp_Object args
[2];
1234 args
[0] = build_string ("<Family %d>");
1235 args
[1] = Fcar (address
);
1236 return Fformat (2, args
);
1242 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1243 doc
: /* Return a list of all processes. */)
1246 return Fmapcar (Qcdr
, Vprocess_alist
);
1249 /* Starting asynchronous inferior processes. */
1251 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1253 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1254 doc
: /* Start a program in a subprocess. Return the process object for it.
1255 NAME is name for process. It is modified if necessary to make it unique.
1256 BUFFER is the buffer (or buffer name) to associate with the process.
1258 Process output (both standard output and standard error streams) goes
1259 at end of BUFFER, unless you specify an output stream or filter
1260 function to handle the output. BUFFER may also be nil, meaning that
1261 this process is not associated with any buffer.
1263 PROGRAM is the program file name. It is searched for in `exec-path'
1264 (which see). If nil, just associate a pty with the buffer. Remaining
1265 arguments are strings to give program as arguments.
1267 If you want to separate standard output from standard error, invoke
1268 the command through a shell and redirect one of them using the shell
1271 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1272 (ptrdiff_t nargs
, Lisp_Object
*args
)
1274 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1275 register unsigned char **new_argv
;
1277 ptrdiff_t count
= SPECPDL_INDEX ();
1281 buffer
= Fget_buffer_create (buffer
);
1283 /* Make sure that the child will be able to chdir to the current
1284 buffer's current directory, or its unhandled equivalent. We
1285 can't just have the child check for an error when it does the
1286 chdir, since it's in a vfork.
1288 We have to GCPRO around this because Fexpand_file_name and
1289 Funhandled_file_name_directory might call a file name handling
1290 function. The argument list is protected by the caller, so all
1291 we really have to worry about is buffer. */
1293 struct gcpro gcpro1
, gcpro2
;
1295 current_dir
= BVAR (current_buffer
, directory
);
1297 GCPRO2 (buffer
, current_dir
);
1299 current_dir
= Funhandled_file_name_directory (current_dir
);
1300 if (NILP (current_dir
))
1301 /* If the file name handler says that current_dir is unreachable, use
1302 a sensible default. */
1303 current_dir
= build_string ("~/");
1304 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1305 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1306 report_file_error ("Setting current directory",
1307 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1313 CHECK_STRING (name
);
1317 if (!NILP (program
))
1318 CHECK_STRING (program
);
1320 proc
= make_process (name
);
1321 /* If an error occurs and we can't start the process, we want to
1322 remove it from the process list. This means that each error
1323 check in create_process doesn't need to call remove_process
1324 itself; it's all taken care of here. */
1325 record_unwind_protect (start_process_unwind
, proc
);
1327 PSET (XPROCESS (proc
), childp
, Qt
);
1328 PSET (XPROCESS (proc
), plist
, Qnil
);
1329 PSET (XPROCESS (proc
), type
, Qreal
);
1330 PSET (XPROCESS (proc
), buffer
, buffer
);
1331 PSET (XPROCESS (proc
), sentinel
, Qnil
);
1332 PSET (XPROCESS (proc
), filter
, Qnil
);
1333 PSET (XPROCESS (proc
), command
, Flist (nargs
- 2, args
+ 2));
1336 /* AKA GNUTLS_INITSTAGE(proc). */
1337 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1338 PSET (XPROCESS (proc
), gnutls_cred_type
, Qnil
);
1341 #ifdef ADAPTIVE_READ_BUFFERING
1342 XPROCESS (proc
)->adaptive_read_buffering
1343 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1344 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1347 /* Make the process marker point into the process buffer (if any). */
1348 if (BUFFERP (buffer
))
1349 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1350 BUF_ZV (XBUFFER (buffer
)),
1351 BUF_ZV_BYTE (XBUFFER (buffer
)));
1354 /* Decide coding systems for communicating with the process. Here
1355 we don't setup the structure coding_system nor pay attention to
1356 unibyte mode. They are done in create_process. */
1358 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1359 Lisp_Object coding_systems
= Qt
;
1360 Lisp_Object val
, *args2
;
1361 struct gcpro gcpro1
, gcpro2
;
1363 val
= Vcoding_system_for_read
;
1366 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1367 args2
[0] = Qstart_process
;
1368 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1369 GCPRO2 (proc
, current_dir
);
1370 if (!NILP (program
))
1371 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1373 if (CONSP (coding_systems
))
1374 val
= XCAR (coding_systems
);
1375 else if (CONSP (Vdefault_process_coding_system
))
1376 val
= XCAR (Vdefault_process_coding_system
);
1378 PSET (XPROCESS (proc
), decode_coding_system
, val
);
1380 val
= Vcoding_system_for_write
;
1383 if (EQ (coding_systems
, Qt
))
1385 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1386 args2
[0] = Qstart_process
;
1387 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1388 GCPRO2 (proc
, current_dir
);
1389 if (!NILP (program
))
1390 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1393 if (CONSP (coding_systems
))
1394 val
= XCDR (coding_systems
);
1395 else if (CONSP (Vdefault_process_coding_system
))
1396 val
= XCDR (Vdefault_process_coding_system
);
1398 PSET (XPROCESS (proc
), encode_coding_system
, val
);
1399 /* Note: At this moment, the above coding system may leave
1400 text-conversion or eol-conversion unspecified. They will be
1401 decided after we read output from the process and decode it by
1402 some coding system, or just before we actually send a text to
1407 PSET (XPROCESS (proc
), decoding_buf
, empty_unibyte_string
);
1408 XPROCESS (proc
)->decoding_carryover
= 0;
1409 PSET (XPROCESS (proc
), encoding_buf
, empty_unibyte_string
);
1411 XPROCESS (proc
)->inherit_coding_system_flag
1412 = !(NILP (buffer
) || !inherit_process_coding_system
);
1414 if (!NILP (program
))
1416 /* If program file name is not absolute, search our path for it.
1417 Put the name we will really use in TEM. */
1418 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1419 && !(SCHARS (program
) > 1
1420 && IS_DEVICE_SEP (SREF (program
, 1))))
1422 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1425 GCPRO4 (name
, program
, buffer
, current_dir
);
1426 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1429 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1430 tem
= Fexpand_file_name (tem
, Qnil
);
1434 if (!NILP (Ffile_directory_p (program
)))
1435 error ("Specified program for new process is a directory");
1439 /* If program file name starts with /: for quoting a magic name,
1441 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1442 && SREF (tem
, 1) == ':')
1443 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1446 Lisp_Object arg_encoding
= Qnil
;
1447 struct gcpro gcpro1
;
1450 /* Encode the file name and put it in NEW_ARGV.
1451 That's where the child will use it to execute the program. */
1452 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1454 /* Here we encode arguments by the coding system used for sending
1455 data to the process. We don't support using different coding
1456 systems for encoding arguments and for encoding data sent to the
1459 for (i
= 3; i
< nargs
; i
++)
1461 tem
= Fcons (args
[i
], tem
);
1462 CHECK_STRING (XCAR (tem
));
1463 if (STRING_MULTIBYTE (XCAR (tem
)))
1465 if (NILP (arg_encoding
))
1466 arg_encoding
= (complement_process_encoding_system
1467 (XPROCESS (proc
)->encode_coding_system
));
1469 code_convert_string_norecord
1470 (XCAR (tem
), arg_encoding
, 1));
1477 /* Now that everything is encoded we can collect the strings into
1479 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1480 new_argv
[nargs
- 2] = 0;
1482 for (i
= nargs
- 2; i
-- != 0; )
1484 new_argv
[i
] = SDATA (XCAR (tem
));
1488 create_process (proc
, (char **) new_argv
, current_dir
);
1493 return unbind_to (count
, proc
);
1496 /* This function is the unwind_protect form for Fstart_process. If
1497 PROC doesn't have its pid set, then we know someone has signaled
1498 an error and the process wasn't started successfully, so we should
1499 remove it from the process list. */
1501 start_process_unwind (Lisp_Object proc
)
1503 if (!PROCESSP (proc
))
1506 /* Was PROC started successfully?
1507 -2 is used for a pty with no process, eg for gdb. */
1508 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1509 remove_process (proc
);
1515 create_process_1 (struct atimer
*timer
)
1517 /* Nothing to do. */
1522 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1524 int inchannel
, outchannel
;
1527 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1528 int wait_child_setup
[2];
1532 struct sigaction sigint_action
;
1533 struct sigaction sigquit_action
;
1534 struct sigaction sigpipe_action
;
1536 struct sigaction sighup_action
;
1538 /* Use volatile to protect variables from being clobbered by longjmp. */
1539 volatile int forkin
, forkout
;
1540 volatile int pty_flag
= 0;
1542 extern char **environ
;
1545 inchannel
= outchannel
= -1;
1548 if (!NILP (Vprocess_connection_type
))
1549 outchannel
= inchannel
= allocate_pty ();
1553 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1554 /* On most USG systems it does not work to open the pty's tty here,
1555 then close it and reopen it in the child. */
1557 /* Don't let this terminal become our controlling terminal
1558 (in case we don't have one). */
1559 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1561 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1564 report_file_error ("Opening pty", Qnil
);
1566 forkin
= forkout
= -1;
1567 #endif /* not USG, or USG_SUBTTY_WORKS */
1571 #endif /* HAVE_PTYS */
1576 report_file_error ("Creating pipe", Qnil
);
1582 emacs_close (inchannel
);
1583 emacs_close (forkout
);
1584 report_file_error ("Creating pipe", Qnil
);
1590 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1594 tem
= pipe (wait_child_setup
);
1596 report_file_error ("Creating pipe", Qnil
);
1597 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1599 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1602 emacs_close (wait_child_setup
[0]);
1603 emacs_close (wait_child_setup
[1]);
1604 report_file_error ("Setting file descriptor flags", Qnil
);
1610 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1611 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1614 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1615 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1619 /* Record this as an active process, with its channels.
1620 As a result, child_setup will close Emacs's side of the pipes. */
1621 chan_process
[inchannel
] = process
;
1622 XPROCESS (process
)->infd
= inchannel
;
1623 XPROCESS (process
)->outfd
= outchannel
;
1625 /* Previously we recorded the tty descriptor used in the subprocess.
1626 It was only used for getting the foreground tty process, so now
1627 we just reopen the device (see emacs_get_tty_pgrp) as this is
1628 more portable (see USG_SUBTTY_WORKS above). */
1630 XPROCESS (process
)->pty_flag
= pty_flag
;
1631 PSET (XPROCESS (process
), status
, Qrun
);
1633 /* Delay interrupts until we have a chance to store
1634 the new fork's pid in its process structure */
1635 sigemptyset (&blocked
);
1637 sigaddset (&blocked
, SIGCHLD
);
1639 #ifdef HAVE_WORKING_VFORK
1640 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1641 this sets the parent's signal handlers as well as the child's.
1642 So delay all interrupts whose handlers the child might munge,
1643 and record the current handlers so they can be restored later. */
1644 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1645 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1646 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1648 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1650 #endif /* HAVE_WORKING_VFORK */
1651 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1653 FD_SET (inchannel
, &input_wait_mask
);
1654 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1655 if (inchannel
> max_process_desc
)
1656 max_process_desc
= inchannel
;
1658 /* Until we store the proper pid, enable sigchld_handler
1659 to recognize an unknown pid as standing for this process.
1660 It is very important not to let this `marker' value stay
1661 in the table after this function has returned; if it does
1662 it might cause call-process to hang and subsequent asynchronous
1663 processes to get their return values scrambled. */
1664 XPROCESS (process
)->pid
= -1;
1666 /* This must be called after the above line because it may signal an
1668 setup_process_coding_systems (process
);
1673 /* child_setup must clobber environ on systems with true vfork.
1674 Protect it from permanent change. */
1675 char **save_environ
= environ
;
1676 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1681 #endif /* not WINDOWSNT */
1683 int xforkin
= forkin
;
1684 int xforkout
= forkout
;
1686 #if 0 /* This was probably a mistake--it duplicates code later on,
1687 but fails to handle all the cases. */
1688 /* Make sure SIGCHLD is not blocked in the child. */
1689 sigsetmask (SIGEMPTYMASK
);
1692 /* Make the pty be the controlling terminal of the process. */
1694 /* First, disconnect its current controlling terminal. */
1696 /* We tried doing setsid only if pty_flag, but it caused
1697 process_set_signal to fail on SGI when using a pipe. */
1699 /* Make the pty's terminal the controlling terminal. */
1700 if (pty_flag
&& xforkin
>= 0)
1703 /* We ignore the return value
1704 because faith@cs.unc.edu says that is necessary on Linux. */
1705 ioctl (xforkin
, TIOCSCTTY
, 0);
1708 #else /* not HAVE_SETSID */
1710 /* It's very important to call setpgrp here and no time
1711 afterwards. Otherwise, we lose our controlling tty which
1712 is set when we open the pty. */
1715 #endif /* not HAVE_SETSID */
1716 #if defined (LDISC1)
1717 if (pty_flag
&& xforkin
>= 0)
1720 tcgetattr (xforkin
, &t
);
1722 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1723 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1726 #if defined (NTTYDISC) && defined (TIOCSETD)
1727 if (pty_flag
&& xforkin
>= 0)
1729 /* Use new line discipline. */
1730 int ldisc
= NTTYDISC
;
1731 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1736 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1737 can do TIOCSPGRP only to the process's controlling tty. */
1740 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1741 I can't test it since I don't have 4.3. */
1742 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1745 ioctl (j
, TIOCNOTTY
, 0);
1749 /* In order to get a controlling terminal on some versions
1750 of BSD, it is necessary to put the process in pgrp 0
1751 before it opens the terminal. */
1759 #endif /* TIOCNOTTY */
1761 #if !defined (DONT_REOPEN_PTY)
1762 /*** There is a suggestion that this ought to be a
1763 conditional on TIOCSPGRP,
1764 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1765 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1766 that system does seem to need this code, even though
1767 both HAVE_SETSID and TIOCSCTTY are defined. */
1768 /* Now close the pty (if we had it open) and reopen it.
1769 This makes the pty the controlling terminal of the subprocess. */
1773 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1776 emacs_close (xforkin
);
1777 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1781 emacs_write (1, "Couldn't open the pty terminal ", 31);
1782 emacs_write (1, pty_name
, strlen (pty_name
));
1783 emacs_write (1, "\n", 1);
1788 #endif /* not DONT_REOPEN_PTY */
1790 #ifdef SETUP_SLAVE_PTY
1795 #endif /* SETUP_SLAVE_PTY */
1797 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1798 Now reenable it in the child, so it will die when we want it to. */
1800 signal (SIGHUP
, SIG_DFL
);
1802 #endif /* HAVE_PTYS */
1804 signal (SIGINT
, SIG_DFL
);
1805 signal (SIGQUIT
, SIG_DFL
);
1806 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1808 signal (SIGPIPE
, SIG_DFL
);
1810 /* Stop blocking signals in the child. */
1811 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1814 child_setup_tty (xforkout
);
1816 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1817 new_argv
, 1, encoded_current_dir
);
1818 #else /* not WINDOWSNT */
1820 emacs_close (wait_child_setup
[0]);
1822 child_setup (xforkin
, xforkout
, xforkout
,
1823 new_argv
, 1, encoded_current_dir
);
1824 #endif /* not WINDOWSNT */
1826 environ
= save_environ
;
1831 /* This runs in the Emacs process. */
1835 emacs_close (forkin
);
1836 if (forkin
!= forkout
&& forkout
>= 0)
1837 emacs_close (forkout
);
1841 /* vfork succeeded. */
1842 XPROCESS (process
)->pid
= pid
;
1845 register_child (pid
, inchannel
);
1846 #endif /* WINDOWSNT */
1848 /* If the subfork execv fails, and it exits,
1849 this close hangs. I don't know why.
1850 So have an interrupt jar it loose. */
1852 struct atimer
*timer
;
1853 EMACS_TIME offset
= make_emacs_time (1, 0);
1856 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1859 emacs_close (forkin
);
1861 cancel_atimer (timer
);
1865 if (forkin
!= forkout
&& forkout
>= 0)
1866 emacs_close (forkout
);
1870 PSET (XPROCESS (process
), tty_name
, build_string (pty_name
));
1873 PSET (XPROCESS (process
), tty_name
, Qnil
);
1875 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1876 /* Wait for child_setup to complete in case that vfork is
1877 actually defined as fork. The descriptor wait_child_setup[1]
1878 of a pipe is closed at the child side either by close-on-exec
1879 on successful execvp or the _exit call in child_setup. */
1883 emacs_close (wait_child_setup
[1]);
1884 emacs_read (wait_child_setup
[0], &dummy
, 1);
1885 emacs_close (wait_child_setup
[0]);
1890 /* Restore the signal state whether vfork succeeded or not.
1891 (We will signal an error, below, if it failed.) */
1892 #ifdef HAVE_WORKING_VFORK
1893 /* Restore the parent's signal handlers. */
1894 sigaction (SIGINT
, &sigint_action
, 0);
1895 sigaction (SIGQUIT
, &sigquit_action
, 0);
1896 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1898 sigaction (SIGHUP
, &sighup_action
, 0);
1900 #endif /* HAVE_WORKING_VFORK */
1901 /* Stop blocking signals in the parent. */
1902 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1904 /* Now generate the error if vfork failed. */
1906 report_file_error ("Doing vfork", Qnil
);
1910 create_pty (Lisp_Object process
)
1912 int inchannel
, outchannel
;
1915 inchannel
= outchannel
= -1;
1918 if (!NILP (Vprocess_connection_type
))
1919 outchannel
= inchannel
= allocate_pty ();
1923 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1924 /* On most USG systems it does not work to open the pty's tty here,
1925 then close it and reopen it in the child. */
1927 /* Don't let this terminal become our controlling terminal
1928 (in case we don't have one). */
1929 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1931 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1934 report_file_error ("Opening pty", Qnil
);
1935 #if defined (DONT_REOPEN_PTY)
1936 /* In the case that vfork is defined as fork, the parent process
1937 (Emacs) may send some data before the child process completes
1938 tty options setup. So we setup tty before forking. */
1939 child_setup_tty (forkout
);
1940 #endif /* DONT_REOPEN_PTY */
1941 #endif /* not USG, or USG_SUBTTY_WORKS */
1944 #endif /* HAVE_PTYS */
1947 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1948 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1951 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1952 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1956 /* Record this as an active process, with its channels.
1957 As a result, child_setup will close Emacs's side of the pipes. */
1958 chan_process
[inchannel
] = process
;
1959 XPROCESS (process
)->infd
= inchannel
;
1960 XPROCESS (process
)->outfd
= outchannel
;
1962 /* Previously we recorded the tty descriptor used in the subprocess.
1963 It was only used for getting the foreground tty process, so now
1964 we just reopen the device (see emacs_get_tty_pgrp) as this is
1965 more portable (see USG_SUBTTY_WORKS above). */
1967 XPROCESS (process
)->pty_flag
= pty_flag
;
1968 PSET (XPROCESS (process
), status
, Qrun
);
1969 setup_process_coding_systems (process
);
1971 FD_SET (inchannel
, &input_wait_mask
);
1972 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1973 if (inchannel
> max_process_desc
)
1974 max_process_desc
= inchannel
;
1976 XPROCESS (process
)->pid
= -2;
1979 PSET (XPROCESS (process
), tty_name
, build_string (pty_name
));
1982 PSET (XPROCESS (process
), tty_name
, Qnil
);
1986 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1987 The address family of sa is not included in the result. */
1990 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
1992 Lisp_Object address
;
1995 register struct Lisp_Vector
*p
;
1997 /* Workaround for a bug in getsockname on BSD: Names bound to
1998 sockets in the UNIX domain are inaccessible; getsockname returns
1999 a zero length name. */
2000 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2001 return empty_unibyte_string
;
2003 switch (sa
->sa_family
)
2007 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2008 len
= sizeof (sin
->sin_addr
) + 1;
2009 address
= Fmake_vector (make_number (len
), Qnil
);
2010 p
= XVECTOR (address
);
2011 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2012 cp
= (unsigned char *) &sin
->sin_addr
;
2018 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2019 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2020 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2021 address
= Fmake_vector (make_number (len
), Qnil
);
2022 p
= XVECTOR (address
);
2023 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2024 for (i
= 0; i
< len
; i
++)
2025 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2029 #ifdef HAVE_LOCAL_SOCKETS
2032 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2033 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2034 if (sockun
->sun_path
[i
] == 0)
2036 return make_unibyte_string (sockun
->sun_path
, i
);
2040 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2041 address
= Fcons (make_number (sa
->sa_family
),
2042 Fmake_vector (make_number (len
), Qnil
));
2043 p
= XVECTOR (XCDR (address
));
2044 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2050 p
->contents
[i
++] = make_number (*cp
++);
2056 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2059 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2061 register struct Lisp_Vector
*p
;
2063 if (VECTORP (address
))
2065 p
= XVECTOR (address
);
2066 if (p
->header
.size
== 5)
2069 return sizeof (struct sockaddr_in
);
2072 else if (p
->header
.size
== 9)
2074 *familyp
= AF_INET6
;
2075 return sizeof (struct sockaddr_in6
);
2079 #ifdef HAVE_LOCAL_SOCKETS
2080 else if (STRINGP (address
))
2082 *familyp
= AF_LOCAL
;
2083 return sizeof (struct sockaddr_un
);
2086 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2087 && VECTORP (XCDR (address
)))
2089 struct sockaddr
*sa
;
2090 *familyp
= XINT (XCAR (address
));
2091 p
= XVECTOR (XCDR (address
));
2092 return p
->header
.size
+ sizeof (sa
->sa_family
);
2097 /* Convert an address object (vector or string) to an internal sockaddr.
2099 The address format has been basically validated by
2100 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2101 it could have come from user data. So if FAMILY is not valid,
2102 we return after zeroing *SA. */
2105 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2107 register struct Lisp_Vector
*p
;
2108 register unsigned char *cp
= NULL
;
2112 memset (sa
, 0, len
);
2114 if (VECTORP (address
))
2116 p
= XVECTOR (address
);
2117 if (family
== AF_INET
)
2119 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2120 len
= sizeof (sin
->sin_addr
) + 1;
2121 hostport
= XINT (p
->contents
[--len
]);
2122 sin
->sin_port
= htons (hostport
);
2123 cp
= (unsigned char *)&sin
->sin_addr
;
2124 sa
->sa_family
= family
;
2127 else if (family
== AF_INET6
)
2129 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2130 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2131 len
= sizeof (sin6
->sin6_addr
) + 1;
2132 hostport
= XINT (p
->contents
[--len
]);
2133 sin6
->sin6_port
= htons (hostport
);
2134 for (i
= 0; i
< len
; i
++)
2135 if (INTEGERP (p
->contents
[i
]))
2137 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2140 sa
->sa_family
= family
;
2147 else if (STRINGP (address
))
2149 #ifdef HAVE_LOCAL_SOCKETS
2150 if (family
== AF_LOCAL
)
2152 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2153 cp
= SDATA (address
);
2154 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2155 sockun
->sun_path
[i
] = *cp
++;
2156 sa
->sa_family
= family
;
2163 p
= XVECTOR (XCDR (address
));
2164 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2167 for (i
= 0; i
< len
; i
++)
2168 if (INTEGERP (p
->contents
[i
]))
2169 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2172 #ifdef DATAGRAM_SOCKETS
2173 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2175 doc
: /* Get the current datagram address associated with PROCESS. */)
2176 (Lisp_Object process
)
2180 CHECK_PROCESS (process
);
2182 if (!DATAGRAM_CONN_P (process
))
2185 channel
= XPROCESS (process
)->infd
;
2186 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2187 datagram_address
[channel
].len
);
2190 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2192 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2193 Returns nil upon error setting address, ADDRESS otherwise. */)
2194 (Lisp_Object process
, Lisp_Object address
)
2199 CHECK_PROCESS (process
);
2201 if (!DATAGRAM_CONN_P (process
))
2204 channel
= XPROCESS (process
)->infd
;
2206 len
= get_lisp_to_sockaddr_size (address
, &family
);
2207 if (datagram_address
[channel
].len
!= len
)
2209 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2215 static const struct socket_options
{
2216 /* The name of this option. Should be lowercase version of option
2217 name without SO_ prefix. */
2219 /* Option level SOL_... */
2221 /* Option number SO_... */
2223 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2224 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2225 } socket_options
[] =
2227 #ifdef SO_BINDTODEVICE
2228 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2231 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2234 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2237 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2240 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2243 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2246 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2249 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2251 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2254 /* Set option OPT to value VAL on socket S.
2256 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2257 Signals an error if setting a known option fails.
2261 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2264 const struct socket_options
*sopt
;
2269 name
= SSDATA (SYMBOL_NAME (opt
));
2270 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2271 if (strcmp (name
, sopt
->name
) == 0)
2274 switch (sopt
->opttype
)
2279 optval
= NILP (val
) ? 0 : 1;
2280 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2281 &optval
, sizeof (optval
));
2288 if (TYPE_RANGED_INTEGERP (int, val
))
2289 optval
= XINT (val
);
2291 error ("Bad option value for %s", name
);
2292 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2293 &optval
, sizeof (optval
));
2297 #ifdef SO_BINDTODEVICE
2300 char devname
[IFNAMSIZ
+1];
2302 /* This is broken, at least in the Linux 2.4 kernel.
2303 To unbind, the arg must be a zero integer, not the empty string.
2304 This should work on all systems. KFS. 2003-09-23. */
2305 memset (devname
, 0, sizeof devname
);
2308 char *arg
= SSDATA (val
);
2309 int len
= min (strlen (arg
), IFNAMSIZ
);
2310 memcpy (devname
, arg
, len
);
2312 else if (!NILP (val
))
2313 error ("Bad option value for %s", name
);
2314 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2323 struct linger linger
;
2326 linger
.l_linger
= 0;
2327 if (TYPE_RANGED_INTEGERP (int, val
))
2328 linger
.l_linger
= XINT (val
);
2330 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2331 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2332 &linger
, sizeof (linger
));
2342 report_file_error ("Cannot set network option",
2343 Fcons (opt
, Fcons (val
, Qnil
)));
2344 return (1 << sopt
->optbit
);
2348 DEFUN ("set-network-process-option",
2349 Fset_network_process_option
, Sset_network_process_option
,
2351 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2352 See `make-network-process' for a list of options and values.
2353 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2354 OPTION is not a supported option, return nil instead; otherwise return t. */)
2355 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2358 struct Lisp_Process
*p
;
2360 CHECK_PROCESS (process
);
2361 p
= XPROCESS (process
);
2362 if (!NETCONN1_P (p
))
2363 error ("Process is not a network process");
2367 error ("Process is not running");
2369 if (set_socket_option (s
, option
, value
))
2371 PSET (p
, childp
, Fplist_put (p
->childp
, option
, value
));
2375 if (NILP (no_error
))
2376 error ("Unknown or unsupported option");
2382 DEFUN ("serial-process-configure",
2383 Fserial_process_configure
,
2384 Sserial_process_configure
,
2386 doc
: /* Configure speed, bytesize, etc. of a serial process.
2388 Arguments are specified as keyword/argument pairs. Attributes that
2389 are not given are re-initialized from the process's current
2390 configuration (available via the function `process-contact') or set to
2391 reasonable default values. The following arguments are defined:
2397 -- Any of these arguments can be given to identify the process that is
2398 to be configured. If none of these arguments is given, the current
2399 buffer's process is used.
2401 :speed SPEED -- SPEED is the speed of the serial port in bits per
2402 second, also called baud rate. Any value can be given for SPEED, but
2403 most serial ports work only at a few defined values between 1200 and
2404 115200, with 9600 being the most common value. If SPEED is nil, the
2405 serial port is not configured any further, i.e., all other arguments
2406 are ignored. This may be useful for special serial ports such as
2407 Bluetooth-to-serial converters which can only be configured through AT
2408 commands. A value of nil for SPEED can be used only when passed
2409 through `make-serial-process' or `serial-term'.
2411 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2412 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2414 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2415 `odd' (use odd parity), or the symbol `even' (use even parity). If
2416 PARITY is not given, no parity is used.
2418 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2419 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2420 is not given or nil, 1 stopbit is used.
2422 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2423 flowcontrol to be used, which is either nil (don't use flowcontrol),
2424 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2425 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2426 flowcontrol is used.
2428 `serial-process-configure' is called by `make-serial-process' for the
2429 initial configuration of the serial port.
2433 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2435 \(serial-process-configure
2436 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2438 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2440 usage: (serial-process-configure &rest ARGS) */)
2441 (ptrdiff_t nargs
, Lisp_Object
*args
)
2443 struct Lisp_Process
*p
;
2444 Lisp_Object contact
= Qnil
;
2445 Lisp_Object proc
= Qnil
;
2446 struct gcpro gcpro1
;
2448 contact
= Flist (nargs
, args
);
2451 proc
= Fplist_get (contact
, QCprocess
);
2453 proc
= Fplist_get (contact
, QCname
);
2455 proc
= Fplist_get (contact
, QCbuffer
);
2457 proc
= Fplist_get (contact
, QCport
);
2458 proc
= get_process (proc
);
2459 p
= XPROCESS (proc
);
2460 if (!EQ (p
->type
, Qserial
))
2461 error ("Not a serial process");
2463 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2469 serial_configure (p
, contact
);
2475 /* Used by make-serial-process to recover from errors. */
2477 make_serial_process_unwind (Lisp_Object proc
)
2479 if (!PROCESSP (proc
))
2481 remove_process (proc
);
2485 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2487 doc
: /* Create and return a serial port process.
2489 In Emacs, serial port connections are represented by process objects,
2490 so input and output work as for subprocesses, and `delete-process'
2491 closes a serial port connection. However, a serial process has no
2492 process id, it cannot be signaled, and the status codes are different
2493 from normal processes.
2495 `make-serial-process' creates a process and a buffer, on which you
2496 probably want to use `process-send-string'. Try \\[serial-term] for
2497 an interactive terminal. See below for examples.
2499 Arguments are specified as keyword/argument pairs. The following
2500 arguments are defined:
2502 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2503 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2504 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2505 the backslashes in strings).
2507 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2508 which this function calls.
2510 :name NAME -- NAME is the name of the process. If NAME is not given,
2511 the value of PORT is used.
2513 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2514 with the process. Process output goes at the end of that buffer,
2515 unless you specify an output stream or filter function to handle the
2516 output. If BUFFER is not given, the value of NAME is used.
2518 :coding CODING -- If CODING is a symbol, it specifies the coding
2519 system used for both reading and writing for this process. If CODING
2520 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2521 ENCODING is used for writing.
2523 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2524 the process is running. If BOOL is not given, query before exiting.
2526 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2527 In the stopped state, a serial process does not accept incoming data,
2528 but you can send outgoing data. The stopped state is cleared by
2529 `continue-process' and set by `stop-process'.
2531 :filter FILTER -- Install FILTER as the process filter.
2533 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2535 :plist PLIST -- Install PLIST as the initial plist of the process.
2541 -- This function calls `serial-process-configure' to handle these
2544 The original argument list, possibly modified by later configuration,
2545 is available via the function `process-contact'.
2549 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2551 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2553 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2555 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2557 usage: (make-serial-process &rest ARGS) */)
2558 (ptrdiff_t nargs
, Lisp_Object
*args
)
2561 Lisp_Object proc
, contact
, port
;
2562 struct Lisp_Process
*p
;
2563 struct gcpro gcpro1
;
2564 Lisp_Object name
, buffer
;
2565 Lisp_Object tem
, val
;
2566 ptrdiff_t specpdl_count
= -1;
2571 contact
= Flist (nargs
, args
);
2574 port
= Fplist_get (contact
, QCport
);
2576 error ("No port specified");
2577 CHECK_STRING (port
);
2579 if (NILP (Fplist_member (contact
, QCspeed
)))
2580 error (":speed not specified");
2581 if (!NILP (Fplist_get (contact
, QCspeed
)))
2582 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2584 name
= Fplist_get (contact
, QCname
);
2587 CHECK_STRING (name
);
2588 proc
= make_process (name
);
2589 specpdl_count
= SPECPDL_INDEX ();
2590 record_unwind_protect (make_serial_process_unwind
, proc
);
2591 p
= XPROCESS (proc
);
2593 fd
= serial_open (SSDATA (port
));
2596 if (fd
> max_process_desc
)
2597 max_process_desc
= fd
;
2598 chan_process
[fd
] = proc
;
2600 buffer
= Fplist_get (contact
, QCbuffer
);
2603 buffer
= Fget_buffer_create (buffer
);
2604 PSET (p
, buffer
, buffer
);
2606 PSET (p
, childp
, contact
);
2607 PSET (p
, plist
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2608 PSET (p
, type
, Qserial
);
2609 PSET (p
, sentinel
, Fplist_get (contact
, QCsentinel
));
2610 PSET (p
, filter
, Fplist_get (contact
, QCfilter
));
2611 PSET (p
, log
, Qnil
);
2612 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2613 p
->kill_without_query
= 1;
2614 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2615 PSET (p
, command
, Qt
);
2618 if (!EQ (p
->command
, Qt
))
2620 FD_SET (fd
, &input_wait_mask
);
2621 FD_SET (fd
, &non_keyboard_wait_mask
);
2624 if (BUFFERP (buffer
))
2626 set_marker_both (p
->mark
, buffer
,
2627 BUF_ZV (XBUFFER (buffer
)),
2628 BUF_ZV_BYTE (XBUFFER (buffer
)));
2631 tem
= Fplist_member (contact
, QCcoding
);
2632 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2638 val
= XCAR (XCDR (tem
));
2642 else if (!NILP (Vcoding_system_for_read
))
2643 val
= Vcoding_system_for_read
;
2644 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2645 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2647 PSET (p
, decode_coding_system
, val
);
2652 val
= XCAR (XCDR (tem
));
2656 else if (!NILP (Vcoding_system_for_write
))
2657 val
= Vcoding_system_for_write
;
2658 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2659 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2661 PSET (p
, encode_coding_system
, val
);
2663 setup_process_coding_systems (proc
);
2664 PSET (p
, decoding_buf
, empty_unibyte_string
);
2665 p
->decoding_carryover
= 0;
2666 PSET (p
, encoding_buf
, empty_unibyte_string
);
2667 p
->inherit_coding_system_flag
2668 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2670 Fserial_process_configure (nargs
, args
);
2672 specpdl_ptr
= specpdl
+ specpdl_count
;
2678 /* Create a network stream/datagram client/server process. Treated
2679 exactly like a normal process when reading and writing. Primary
2680 differences are in status display and process deletion. A network
2681 connection has no PID; you cannot signal it. All you can do is
2682 stop/continue it and deactivate/close it via delete-process */
2684 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2686 doc
: /* Create and return a network server or client process.
2688 In Emacs, network connections are represented by process objects, so
2689 input and output work as for subprocesses and `delete-process' closes
2690 a network connection. However, a network process has no process id,
2691 it cannot be signaled, and the status codes are different from normal
2694 Arguments are specified as keyword/argument pairs. The following
2695 arguments are defined:
2697 :name NAME -- NAME is name for process. It is modified if necessary
2700 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2701 with the process. Process output goes at end of that buffer, unless
2702 you specify an output stream or filter function to handle the output.
2703 BUFFER may be also nil, meaning that this process is not associated
2706 :host HOST -- HOST is name of the host to connect to, or its IP
2707 address. The symbol `local' specifies the local host. If specified
2708 for a server process, it must be a valid name or address for the local
2709 host, and only clients connecting to that address will be accepted.
2711 :service SERVICE -- SERVICE is name of the service desired, or an
2712 integer specifying a port number to connect to. If SERVICE is t,
2713 a random port number is selected for the server. (If Emacs was
2714 compiled with getaddrinfo, a port number can also be specified as a
2715 string, e.g. "80", as well as an integer. This is not portable.)
2717 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2718 stream type connection, `datagram' creates a datagram type connection,
2719 `seqpacket' creates a reliable datagram connection.
2721 :family FAMILY -- FAMILY is the address (and protocol) family for the
2722 service specified by HOST and SERVICE. The default (nil) is to use
2723 whatever address family (IPv4 or IPv6) that is defined for the host
2724 and port number specified by HOST and SERVICE. Other address families
2726 local -- for a local (i.e. UNIX) address specified by SERVICE.
2727 ipv4 -- use IPv4 address family only.
2728 ipv6 -- use IPv6 address family only.
2730 :local ADDRESS -- ADDRESS is the local address used for the connection.
2731 This parameter is ignored when opening a client process. When specified
2732 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2734 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2735 connection. This parameter is ignored when opening a stream server
2736 process. For a datagram server process, it specifies the initial
2737 setting of the remote datagram address. When specified for a client
2738 process, the FAMILY, HOST, and SERVICE args are ignored.
2740 The format of ADDRESS depends on the address family:
2741 - An IPv4 address is represented as an vector of integers [A B C D P]
2742 corresponding to numeric IP address A.B.C.D and port number P.
2743 - A local address is represented as a string with the address in the
2744 local address space.
2745 - An "unsupported family" address is represented by a cons (F . AV)
2746 where F is the family number and AV is a vector containing the socket
2747 address data with one element per address data byte. Do not rely on
2748 this format in portable code, as it may depend on implementation
2749 defined constants, data sizes, and data structure alignment.
2751 :coding CODING -- If CODING is a symbol, it specifies the coding
2752 system used for both reading and writing for this process. If CODING
2753 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2754 ENCODING is used for writing.
2756 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2757 return without waiting for the connection to complete; instead, the
2758 sentinel function will be called with second arg matching "open" (if
2759 successful) or "failed" when the connect completes. Default is to use
2760 a blocking connect (i.e. wait) for stream type connections.
2762 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2763 running when Emacs is exited.
2765 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2766 In the stopped state, a server process does not accept new
2767 connections, and a client process does not handle incoming traffic.
2768 The stopped state is cleared by `continue-process' and set by
2771 :filter FILTER -- Install FILTER as the process filter.
2773 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2774 process filter are multibyte, otherwise they are unibyte.
2775 If this keyword is not specified, the strings are multibyte if
2776 the default value of `enable-multibyte-characters' is non-nil.
2778 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2780 :log LOG -- Install LOG as the server process log function. This
2781 function is called when the server accepts a network connection from a
2782 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2783 is the server process, CLIENT is the new process for the connection,
2784 and MESSAGE is a string.
2786 :plist PLIST -- Install PLIST as the new process' initial plist.
2788 :server QLEN -- if QLEN is non-nil, create a server process for the
2789 specified FAMILY, SERVICE, and connection type (stream or datagram).
2790 If QLEN is an integer, it is used as the max. length of the server's
2791 pending connection queue (also known as the backlog); the default
2792 queue length is 5. Default is to create a client process.
2794 The following network options can be specified for this connection:
2796 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2797 :dontroute BOOL -- Only send to directly connected hosts.
2798 :keepalive BOOL -- Send keep-alive messages on network stream.
2799 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2800 :oobinline BOOL -- Place out-of-band data in receive data stream.
2801 :priority INT -- Set protocol defined priority for sent packets.
2802 :reuseaddr BOOL -- Allow reusing a recently used local address
2803 (this is allowed by default for a server process).
2804 :bindtodevice NAME -- bind to interface NAME. Using this may require
2805 special privileges on some systems.
2807 Consult the relevant system programmer's manual pages for more
2808 information on using these options.
2811 A server process will listen for and accept connections from clients.
2812 When a client connection is accepted, a new network process is created
2813 for the connection with the following parameters:
2815 - The client's process name is constructed by concatenating the server
2816 process' NAME and a client identification string.
2817 - If the FILTER argument is non-nil, the client process will not get a
2818 separate process buffer; otherwise, the client's process buffer is a newly
2819 created buffer named after the server process' BUFFER name or process
2820 NAME concatenated with the client identification string.
2821 - The connection type and the process filter and sentinel parameters are
2822 inherited from the server process' TYPE, FILTER and SENTINEL.
2823 - The client process' contact info is set according to the client's
2824 addressing information (typically an IP address and a port number).
2825 - The client process' plist is initialized from the server's plist.
2827 Notice that the FILTER and SENTINEL args are never used directly by
2828 the server process. Also, the BUFFER argument is not used directly by
2829 the server process, but via the optional :log function, accepted (and
2830 failed) connections may be logged in the server process' buffer.
2832 The original argument list, modified with the actual connection
2833 information, is available via the `process-contact' function.
2835 usage: (make-network-process &rest ARGS) */)
2836 (ptrdiff_t nargs
, Lisp_Object
*args
)
2839 Lisp_Object contact
;
2840 struct Lisp_Process
*p
;
2841 #ifdef HAVE_GETADDRINFO
2842 struct addrinfo ai
, *res
, *lres
;
2843 struct addrinfo hints
;
2844 const char *portstring
;
2846 #else /* HAVE_GETADDRINFO */
2847 struct _emacs_addrinfo
2853 struct sockaddr
*ai_addr
;
2854 struct _emacs_addrinfo
*ai_next
;
2856 #endif /* HAVE_GETADDRINFO */
2857 struct sockaddr_in address_in
;
2858 #ifdef HAVE_LOCAL_SOCKETS
2859 struct sockaddr_un address_un
;
2864 int s
= -1, outch
, inch
;
2865 struct gcpro gcpro1
;
2866 ptrdiff_t count
= SPECPDL_INDEX ();
2868 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2870 Lisp_Object name
, buffer
, host
, service
, address
;
2871 Lisp_Object filter
, sentinel
;
2872 int is_non_blocking_client
= 0;
2873 int is_server
= 0, backlog
= 5;
2880 /* Save arguments for process-contact and clone-process. */
2881 contact
= Flist (nargs
, args
);
2885 /* Ensure socket support is loaded if available. */
2886 init_winsock (TRUE
);
2889 /* :type TYPE (nil: stream, datagram */
2890 tem
= Fplist_get (contact
, QCtype
);
2892 socktype
= SOCK_STREAM
;
2893 #ifdef DATAGRAM_SOCKETS
2894 else if (EQ (tem
, Qdatagram
))
2895 socktype
= SOCK_DGRAM
;
2897 #ifdef HAVE_SEQPACKET
2898 else if (EQ (tem
, Qseqpacket
))
2899 socktype
= SOCK_SEQPACKET
;
2902 error ("Unsupported connection type");
2905 tem
= Fplist_get (contact
, QCserver
);
2908 /* Don't support network sockets when non-blocking mode is
2909 not available, since a blocked Emacs is not useful. */
2910 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2911 error ("Network servers not supported");
2914 if (TYPE_RANGED_INTEGERP (int, tem
))
2915 backlog
= XINT (tem
);
2919 /* Make QCaddress an alias for :local (server) or :remote (client). */
2920 QCaddress
= is_server
? QClocal
: QCremote
;
2923 if (!is_server
&& socktype
!= SOCK_DGRAM
2924 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2926 #ifndef NON_BLOCKING_CONNECT
2927 error ("Non-blocking connect not supported");
2929 is_non_blocking_client
= 1;
2933 name
= Fplist_get (contact
, QCname
);
2934 buffer
= Fplist_get (contact
, QCbuffer
);
2935 filter
= Fplist_get (contact
, QCfilter
);
2936 sentinel
= Fplist_get (contact
, QCsentinel
);
2938 CHECK_STRING (name
);
2940 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2941 ai
.ai_socktype
= socktype
;
2946 /* :local ADDRESS or :remote ADDRESS */
2947 address
= Fplist_get (contact
, QCaddress
);
2948 if (!NILP (address
))
2950 host
= service
= Qnil
;
2952 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2953 error ("Malformed :address");
2954 ai
.ai_family
= family
;
2955 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2956 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2960 /* :family FAMILY -- nil (for Inet), local, or integer. */
2961 tem
= Fplist_get (contact
, QCfamily
);
2964 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2970 #ifdef HAVE_LOCAL_SOCKETS
2971 else if (EQ (tem
, Qlocal
))
2975 else if (EQ (tem
, Qipv6
))
2978 else if (EQ (tem
, Qipv4
))
2980 else if (TYPE_RANGED_INTEGERP (int, tem
))
2981 family
= XINT (tem
);
2983 error ("Unknown address family");
2985 ai
.ai_family
= family
;
2987 /* :service SERVICE -- string, integer (port number), or t (random port). */
2988 service
= Fplist_get (contact
, QCservice
);
2990 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2991 host
= Fplist_get (contact
, QChost
);
2994 if (EQ (host
, Qlocal
))
2995 /* Depending on setup, "localhost" may map to different IPv4 and/or
2996 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
2997 host
= build_string ("127.0.0.1");
2998 CHECK_STRING (host
);
3001 #ifdef HAVE_LOCAL_SOCKETS
3002 if (family
== AF_LOCAL
)
3006 message (":family local ignores the :host \"%s\" property",
3008 contact
= Fplist_put (contact
, QChost
, Qnil
);
3011 CHECK_STRING (service
);
3012 memset (&address_un
, 0, sizeof address_un
);
3013 address_un
.sun_family
= AF_LOCAL
;
3014 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3015 error ("Service name too long");
3016 strcpy (address_un
.sun_path
, SSDATA (service
));
3017 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3018 ai
.ai_addrlen
= sizeof address_un
;
3023 /* Slow down polling to every ten seconds.
3024 Some kernels have a bug which causes retrying connect to fail
3025 after a connect. Polling can interfere with gethostbyname too. */
3026 #ifdef POLL_FOR_INPUT
3027 if (socktype
!= SOCK_DGRAM
)
3029 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3030 bind_polling_period (10);
3034 #ifdef HAVE_GETADDRINFO
3035 /* If we have a host, use getaddrinfo to resolve both host and service.
3036 Otherwise, use getservbyname to lookup the service. */
3040 /* SERVICE can either be a string or int.
3041 Convert to a C string for later use by getaddrinfo. */
3042 if (EQ (service
, Qt
))
3044 else if (INTEGERP (service
))
3046 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3047 portstring
= portbuf
;
3051 CHECK_STRING (service
);
3052 portstring
= SSDATA (service
);
3057 memset (&hints
, 0, sizeof (hints
));
3059 hints
.ai_family
= family
;
3060 hints
.ai_socktype
= socktype
;
3061 hints
.ai_protocol
= 0;
3063 #ifdef HAVE_RES_INIT
3067 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3069 #ifdef HAVE_GAI_STRERROR
3070 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3072 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3078 #endif /* HAVE_GETADDRINFO */
3080 /* We end up here if getaddrinfo is not defined, or in case no hostname
3081 has been specified (e.g. for a local server process). */
3083 if (EQ (service
, Qt
))
3085 else if (INTEGERP (service
))
3086 port
= htons ((unsigned short) XINT (service
));
3089 struct servent
*svc_info
;
3090 CHECK_STRING (service
);
3091 svc_info
= getservbyname (SSDATA (service
),
3092 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3094 error ("Unknown service: %s", SDATA (service
));
3095 port
= svc_info
->s_port
;
3098 memset (&address_in
, 0, sizeof address_in
);
3099 address_in
.sin_family
= family
;
3100 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3101 address_in
.sin_port
= port
;
3103 #ifndef HAVE_GETADDRINFO
3106 struct hostent
*host_info_ptr
;
3108 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3109 as it may `hang' Emacs for a very long time. */
3113 #ifdef HAVE_RES_INIT
3117 host_info_ptr
= gethostbyname (SDATA (host
));
3122 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3123 host_info_ptr
->h_length
);
3124 family
= host_info_ptr
->h_addrtype
;
3125 address_in
.sin_family
= family
;
3128 /* Attempt to interpret host as numeric inet address */
3130 unsigned long numeric_addr
;
3131 numeric_addr
= inet_addr (SSDATA (host
));
3132 if (numeric_addr
== -1)
3133 error ("Unknown host \"%s\"", SDATA (host
));
3135 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3136 sizeof (address_in
.sin_addr
));
3140 #endif /* not HAVE_GETADDRINFO */
3142 ai
.ai_family
= family
;
3143 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3144 ai
.ai_addrlen
= sizeof address_in
;
3148 /* Do this in case we never enter the for-loop below. */
3149 count1
= SPECPDL_INDEX ();
3152 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3161 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3168 #ifdef DATAGRAM_SOCKETS
3169 if (!is_server
&& socktype
== SOCK_DGRAM
)
3171 #endif /* DATAGRAM_SOCKETS */
3173 #ifdef NON_BLOCKING_CONNECT
3174 if (is_non_blocking_client
)
3177 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3179 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3191 /* Make us close S if quit. */
3192 record_unwind_protect (close_file_unwind
, make_number (s
));
3194 /* Parse network options in the arg list.
3195 We simply ignore anything which isn't a known option (including other keywords).
3196 An error is signaled if setting a known option fails. */
3197 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3198 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3202 /* Configure as a server socket. */
3204 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3205 explicit :reuseaddr key to override this. */
3206 #ifdef HAVE_LOCAL_SOCKETS
3207 if (family
!= AF_LOCAL
)
3209 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3212 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3213 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3216 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3217 report_file_error ("Cannot bind server socket", Qnil
);
3219 #ifdef HAVE_GETSOCKNAME
3220 if (EQ (service
, Qt
))
3222 struct sockaddr_in sa1
;
3223 socklen_t len1
= sizeof (sa1
);
3224 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3226 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3227 service
= make_number (ntohs (sa1
.sin_port
));
3228 contact
= Fplist_put (contact
, QCservice
, service
);
3233 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3234 report_file_error ("Cannot listen on server socket", Qnil
);
3242 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3245 if (ret
== 0 || xerrno
== EISCONN
)
3247 /* The unwind-protect will be discarded afterwards.
3248 Likewise for immediate_quit. */
3252 #ifdef NON_BLOCKING_CONNECT
3254 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3258 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3265 if (xerrno
== EINTR
)
3267 /* Unlike most other syscalls connect() cannot be called
3268 again. (That would return EALREADY.) The proper way to
3269 wait for completion is pselect(). */
3277 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3283 report_file_error ("select failed", Qnil
);
3287 len
= sizeof xerrno
;
3288 eassert (FD_ISSET (s
, &fdset
));
3289 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3290 report_file_error ("getsockopt failed", Qnil
);
3292 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3296 #endif /* !WINDOWSNT */
3300 /* Discard the unwind protect closing S. */
3301 specpdl_ptr
= specpdl
+ count1
;
3306 if (xerrno
== EINTR
)
3313 #ifdef DATAGRAM_SOCKETS
3314 if (socktype
== SOCK_DGRAM
)
3316 if (datagram_address
[s
].sa
)
3318 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3319 datagram_address
[s
].len
= lres
->ai_addrlen
;
3323 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3324 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3327 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3328 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3329 conv_lisp_to_sockaddr (rfamily
, remote
,
3330 datagram_address
[s
].sa
, rlen
);
3334 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3337 contact
= Fplist_put (contact
, QCaddress
,
3338 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3339 #ifdef HAVE_GETSOCKNAME
3342 struct sockaddr_in sa1
;
3343 socklen_t len1
= sizeof (sa1
);
3344 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3345 contact
= Fplist_put (contact
, QClocal
,
3346 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3353 #ifdef HAVE_GETADDRINFO
3362 /* Discard the unwind protect for closing S, if any. */
3363 specpdl_ptr
= specpdl
+ count1
;
3365 /* Unwind bind_polling_period and request_sigio. */
3366 unbind_to (count
, Qnil
);
3370 /* If non-blocking got this far - and failed - assume non-blocking is
3371 not supported after all. This is probably a wrong assumption, but
3372 the normal blocking calls to open-network-stream handles this error
3374 if (is_non_blocking_client
)
3379 report_file_error ("make server process failed", contact
);
3381 report_file_error ("make client process failed", contact
);
3388 buffer
= Fget_buffer_create (buffer
);
3389 proc
= make_process (name
);
3391 chan_process
[inch
] = proc
;
3394 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3397 fcntl (inch
, F_SETFL
, O_NDELAY
);
3401 p
= XPROCESS (proc
);
3403 PSET (p
, childp
, contact
);
3404 PSET (p
, plist
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3405 PSET (p
, type
, Qnetwork
);
3407 PSET (p
, buffer
, buffer
);
3408 PSET (p
, sentinel
, sentinel
);
3409 PSET (p
, filter
, filter
);
3410 PSET (p
, log
, Fplist_get (contact
, QClog
));
3411 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3412 p
->kill_without_query
= 1;
3413 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3414 PSET (p
, command
, Qt
);
3418 if (is_server
&& socktype
!= SOCK_DGRAM
)
3419 PSET (p
, status
, Qlisten
);
3421 /* Make the process marker point into the process buffer (if any). */
3422 if (BUFFERP (buffer
))
3423 set_marker_both (p
->mark
, buffer
,
3424 BUF_ZV (XBUFFER (buffer
)),
3425 BUF_ZV_BYTE (XBUFFER (buffer
)));
3427 #ifdef NON_BLOCKING_CONNECT
3428 if (is_non_blocking_client
)
3430 /* We may get here if connect did succeed immediately. However,
3431 in that case, we still need to signal this like a non-blocking
3433 PSET (p
, status
, Qconnect
);
3434 if (!FD_ISSET (inch
, &connect_wait_mask
))
3436 FD_SET (inch
, &connect_wait_mask
);
3437 FD_SET (inch
, &write_mask
);
3438 num_pending_connects
++;
3443 /* A server may have a client filter setting of Qt, but it must
3444 still listen for incoming connects unless it is stopped. */
3445 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3446 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3448 FD_SET (inch
, &input_wait_mask
);
3449 FD_SET (inch
, &non_keyboard_wait_mask
);
3452 if (inch
> max_process_desc
)
3453 max_process_desc
= inch
;
3455 tem
= Fplist_member (contact
, QCcoding
);
3456 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3457 tem
= Qnil
; /* No error message (too late!). */
3460 /* Setup coding systems for communicating with the network stream. */
3461 struct gcpro gcpro1
;
3462 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3463 Lisp_Object coding_systems
= Qt
;
3464 Lisp_Object fargs
[5], val
;
3468 val
= XCAR (XCDR (tem
));
3472 else if (!NILP (Vcoding_system_for_read
))
3473 val
= Vcoding_system_for_read
;
3474 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3475 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3476 /* We dare not decode end-of-line format by setting VAL to
3477 Qraw_text, because the existing Emacs Lisp libraries
3478 assume that they receive bare code including a sequence of
3483 if (NILP (host
) || NILP (service
))
3484 coding_systems
= Qnil
;
3487 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3488 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3490 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3493 if (CONSP (coding_systems
))
3494 val
= XCAR (coding_systems
);
3495 else if (CONSP (Vdefault_process_coding_system
))
3496 val
= XCAR (Vdefault_process_coding_system
);
3500 PSET (p
, decode_coding_system
, val
);
3504 val
= XCAR (XCDR (tem
));
3508 else if (!NILP (Vcoding_system_for_write
))
3509 val
= Vcoding_system_for_write
;
3510 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3514 if (EQ (coding_systems
, Qt
))
3516 if (NILP (host
) || NILP (service
))
3517 coding_systems
= Qnil
;
3520 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3521 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3523 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3527 if (CONSP (coding_systems
))
3528 val
= XCDR (coding_systems
);
3529 else if (CONSP (Vdefault_process_coding_system
))
3530 val
= XCDR (Vdefault_process_coding_system
);
3534 PSET (p
, encode_coding_system
, val
);
3536 setup_process_coding_systems (proc
);
3538 PSET (p
, decoding_buf
, empty_unibyte_string
);
3539 p
->decoding_carryover
= 0;
3540 PSET (p
, encoding_buf
, empty_unibyte_string
);
3542 p
->inherit_coding_system_flag
3543 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3550 #if defined (HAVE_NET_IF_H)
3553 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3554 doc
: /* Return an alist of all network interfaces and their network address.
3555 Each element is a cons, the car of which is a string containing the
3556 interface name, and the cdr is the network address in internal
3557 format; see the description of ADDRESS in `make-network-process'. */)
3560 struct ifconf ifconf
;
3561 struct ifreq
*ifreq
;
3563 ptrdiff_t buf_size
= 512;
3567 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3573 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3574 ifconf
.ifc_buf
= buf
;
3575 ifconf
.ifc_len
= buf_size
;
3576 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3583 while (ifconf
.ifc_len
== buf_size
);
3588 ifreq
= ifconf
.ifc_req
;
3589 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3591 struct ifreq
*ifq
= ifreq
;
3592 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3593 #define SIZEOF_IFREQ(sif) \
3594 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3595 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3597 int len
= SIZEOF_IFREQ (ifq
);
3599 int len
= sizeof (*ifreq
);
3601 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3603 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3605 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3608 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3609 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3610 res
= Fcons (Fcons (build_string (namebuf
),
3611 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3612 sizeof (struct sockaddr
))),
3619 #endif /* SIOCGIFCONF */
3621 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3625 const char *flag_sym
;
3628 static const struct ifflag_def ifflag_table
[] = {
3632 #ifdef IFF_BROADCAST
3633 { IFF_BROADCAST
, "broadcast" },
3636 { IFF_DEBUG
, "debug" },
3639 { IFF_LOOPBACK
, "loopback" },
3641 #ifdef IFF_POINTOPOINT
3642 { IFF_POINTOPOINT
, "pointopoint" },
3645 { IFF_RUNNING
, "running" },
3648 { IFF_NOARP
, "noarp" },
3651 { IFF_PROMISC
, "promisc" },
3653 #ifdef IFF_NOTRAILERS
3654 #ifdef NS_IMPL_COCOA
3655 /* Really means smart, notrailers is obsolete */
3656 { IFF_NOTRAILERS
, "smart" },
3658 { IFF_NOTRAILERS
, "notrailers" },
3662 { IFF_ALLMULTI
, "allmulti" },
3665 { IFF_MASTER
, "master" },
3668 { IFF_SLAVE
, "slave" },
3670 #ifdef IFF_MULTICAST
3671 { IFF_MULTICAST
, "multicast" },
3674 { IFF_PORTSEL
, "portsel" },
3676 #ifdef IFF_AUTOMEDIA
3677 { IFF_AUTOMEDIA
, "automedia" },
3680 { IFF_DYNAMIC
, "dynamic" },
3683 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3686 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3689 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3692 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3695 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3700 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3701 doc
: /* Return information about network interface named IFNAME.
3702 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3703 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3704 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3705 FLAGS is the current flags of the interface. */)
3706 (Lisp_Object ifname
)
3709 Lisp_Object res
= Qnil
;
3713 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3714 && defined HAVE_GETIFADDRS && defined LLADDR)
3715 struct ifaddrs
*ifap
;
3718 CHECK_STRING (ifname
);
3720 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3721 error ("interface name too long");
3722 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3724 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3729 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3730 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3732 int flags
= rq
.ifr_flags
;
3733 const struct ifflag_def
*fp
;
3736 /* If flags is smaller than int (i.e. short) it may have the high bit set
3737 due to IFF_MULTICAST. In that case, sign extending it into
3739 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3740 flags
= (unsigned short) rq
.ifr_flags
;
3743 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3745 if (flags
& fp
->flag_bit
)
3747 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3748 flags
-= fp
->flag_bit
;
3751 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3755 elt
= Fcons (make_number (fnum
), elt
);
3760 res
= Fcons (elt
, res
);
3763 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3764 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3766 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3767 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3771 for (n
= 0; n
< 6; n
++)
3772 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3773 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3775 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3776 if (getifaddrs (&ifap
) != -1)
3778 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3779 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3782 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3784 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3785 unsigned char linkaddr
[6];
3788 if (it
->ifa_addr
->sa_family
!= AF_LINK
3789 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3790 || sdl
->sdl_alen
!= 6)
3793 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3794 for (n
= 0; n
< 6; n
++)
3795 p
->contents
[n
] = make_number (linkaddr
[n
]);
3797 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3801 #ifdef HAVE_FREEIFADDRS
3805 #endif /* HAVE_GETIFADDRS && LLADDR */
3807 res
= Fcons (elt
, res
);
3810 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3811 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3814 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3815 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3817 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3821 res
= Fcons (elt
, res
);
3824 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3825 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3828 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3831 res
= Fcons (elt
, res
);
3834 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3835 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3838 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3841 res
= Fcons (elt
, res
);
3845 return any
? res
: Qnil
;
3848 #endif /* defined (HAVE_NET_IF_H) */
3850 /* Turn off input and output for process PROC. */
3853 deactivate_process (Lisp_Object proc
)
3855 register int inchannel
, outchannel
;
3856 register struct Lisp_Process
*p
= XPROCESS (proc
);
3859 /* Delete GnuTLS structures in PROC, if any. */
3860 emacs_gnutls_deinit (proc
);
3861 #endif /* HAVE_GNUTLS */
3863 inchannel
= p
->infd
;
3864 outchannel
= p
->outfd
;
3866 #ifdef ADAPTIVE_READ_BUFFERING
3867 if (p
->read_output_delay
> 0)
3869 if (--process_output_delay_count
< 0)
3870 process_output_delay_count
= 0;
3871 p
->read_output_delay
= 0;
3872 p
->read_output_skip
= 0;
3878 /* Beware SIGCHLD hereabouts. */
3879 flush_pending_output (inchannel
);
3880 emacs_close (inchannel
);
3881 if (outchannel
>= 0 && outchannel
!= inchannel
)
3882 emacs_close (outchannel
);
3886 #ifdef DATAGRAM_SOCKETS
3887 if (DATAGRAM_CHAN_P (inchannel
))
3889 xfree (datagram_address
[inchannel
].sa
);
3890 datagram_address
[inchannel
].sa
= 0;
3891 datagram_address
[inchannel
].len
= 0;
3894 chan_process
[inchannel
] = Qnil
;
3895 FD_CLR (inchannel
, &input_wait_mask
);
3896 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3897 #ifdef NON_BLOCKING_CONNECT
3898 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3900 FD_CLR (inchannel
, &connect_wait_mask
);
3901 FD_CLR (inchannel
, &write_mask
);
3902 if (--num_pending_connects
< 0)
3906 if (inchannel
== max_process_desc
)
3909 /* We just closed the highest-numbered process input descriptor,
3910 so recompute the highest-numbered one now. */
3911 max_process_desc
= 0;
3912 for (i
= 0; i
< MAXDESC
; i
++)
3913 if (!NILP (chan_process
[i
]))
3914 max_process_desc
= i
;
3920 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3922 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3923 It is read into the process' buffers or given to their filter functions.
3924 Non-nil arg PROCESS means do not return until some output has been received
3927 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3928 and milliseconds to wait; return after that much time whether or not
3929 there is any subprocess output. If SECONDS is a floating point number,
3930 it specifies a fractional number of seconds to wait.
3931 The MILLISEC argument is obsolete and should be avoided.
3933 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3934 from PROCESS, suspending reading output from other processes.
3935 If JUST-THIS-ONE is an integer, don't run any timers either.
3936 Return non-nil if we received any output before the timeout expired. */)
3937 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3942 if (! NILP (process
))
3943 CHECK_PROCESS (process
);
3945 just_this_one
= Qnil
;
3947 if (!NILP (millisec
))
3948 { /* Obsolete calling convention using integers rather than floats. */
3949 CHECK_NUMBER (millisec
);
3951 seconds
= make_float (XINT (millisec
) / 1000.0);
3954 CHECK_NUMBER (seconds
);
3955 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3962 if (!NILP (seconds
))
3964 if (INTEGERP (seconds
))
3966 if (0 < XINT (seconds
))
3968 secs
= XINT (seconds
);
3972 else if (FLOATP (seconds
))
3974 if (0 < XFLOAT_DATA (seconds
))
3976 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
3977 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
3978 nsecs
= EMACS_NSECS (t
);
3982 wrong_type_argument (Qnumberp
, seconds
);
3984 else if (! NILP (process
))
3988 (wait_reading_process_output (secs
, nsecs
, 0, 0,
3990 !NILP (process
) ? XPROCESS (process
) : NULL
,
3991 NILP (just_this_one
) ? 0 :
3992 !INTEGERP (just_this_one
) ? 1 : -1)
3996 /* Accept a connection for server process SERVER on CHANNEL. */
3998 static int connect_counter
= 0;
4001 server_accept_connection (Lisp_Object server
, int channel
)
4003 Lisp_Object proc
, caller
, name
, buffer
;
4004 Lisp_Object contact
, host
, service
;
4005 struct Lisp_Process
*ps
= XPROCESS (server
);
4006 struct Lisp_Process
*p
;
4010 struct sockaddr_in in
;
4012 struct sockaddr_in6 in6
;
4014 #ifdef HAVE_LOCAL_SOCKETS
4015 struct sockaddr_un un
;
4018 socklen_t len
= sizeof saddr
;
4020 s
= accept (channel
, &saddr
.sa
, &len
);
4029 if (code
== EWOULDBLOCK
)
4033 if (!NILP (ps
->log
))
4034 call3 (ps
->log
, server
, Qnil
,
4035 concat3 (build_string ("accept failed with code"),
4036 Fnumber_to_string (make_number (code
)),
4037 build_string ("\n")));
4043 /* Setup a new process to handle the connection. */
4045 /* Generate a unique identification of the caller, and build contact
4046 information for this process. */
4049 switch (saddr
.sa
.sa_family
)
4053 Lisp_Object args
[5];
4054 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4055 args
[0] = build_string ("%d.%d.%d.%d");
4056 args
[1] = make_number (*ip
++);
4057 args
[2] = make_number (*ip
++);
4058 args
[3] = make_number (*ip
++);
4059 args
[4] = make_number (*ip
++);
4060 host
= Fformat (5, args
);
4061 service
= make_number (ntohs (saddr
.in
.sin_port
));
4063 args
[0] = build_string (" <%s:%d>");
4066 caller
= Fformat (3, args
);
4073 Lisp_Object args
[9];
4074 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4076 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4077 for (i
= 0; i
< 8; i
++)
4078 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4079 host
= Fformat (9, args
);
4080 service
= make_number (ntohs (saddr
.in
.sin_port
));
4082 args
[0] = build_string (" <[%s]:%d>");
4085 caller
= Fformat (3, args
);
4090 #ifdef HAVE_LOCAL_SOCKETS
4094 caller
= Fnumber_to_string (make_number (connect_counter
));
4095 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4099 /* Create a new buffer name for this process if it doesn't have a
4100 filter. The new buffer name is based on the buffer name or
4101 process name of the server process concatenated with the caller
4104 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4108 buffer
= ps
->buffer
;
4110 buffer
= Fbuffer_name (buffer
);
4115 buffer
= concat2 (buffer
, caller
);
4116 buffer
= Fget_buffer_create (buffer
);
4120 /* Generate a unique name for the new server process. Combine the
4121 server process name with the caller identification. */
4123 name
= concat2 (ps
->name
, caller
);
4124 proc
= make_process (name
);
4126 chan_process
[s
] = proc
;
4129 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4132 fcntl (s
, F_SETFL
, O_NDELAY
);
4136 p
= XPROCESS (proc
);
4138 /* Build new contact information for this setup. */
4139 contact
= Fcopy_sequence (ps
->childp
);
4140 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4141 contact
= Fplist_put (contact
, QChost
, host
);
4142 if (!NILP (service
))
4143 contact
= Fplist_put (contact
, QCservice
, service
);
4144 contact
= Fplist_put (contact
, QCremote
,
4145 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4146 #ifdef HAVE_GETSOCKNAME
4148 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4149 contact
= Fplist_put (contact
, QClocal
,
4150 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4153 PSET (p
, childp
, contact
);
4154 PSET (p
, plist
, Fcopy_sequence (ps
->plist
));
4155 PSET (p
, type
, Qnetwork
);
4157 PSET (p
, buffer
, buffer
);
4158 PSET (p
, sentinel
, ps
->sentinel
);
4159 PSET (p
, filter
, ps
->filter
);
4160 PSET (p
, command
, Qnil
);
4164 PSET (p
, status
, Qrun
);
4166 /* Client processes for accepted connections are not stopped initially. */
4167 if (!EQ (p
->filter
, Qt
))
4169 FD_SET (s
, &input_wait_mask
);
4170 FD_SET (s
, &non_keyboard_wait_mask
);
4173 if (s
> max_process_desc
)
4174 max_process_desc
= s
;
4176 /* Setup coding system for new process based on server process.
4177 This seems to be the proper thing to do, as the coding system
4178 of the new process should reflect the settings at the time the
4179 server socket was opened; not the current settings. */
4181 PSET (p
, decode_coding_system
, ps
->decode_coding_system
);
4182 PSET (p
, encode_coding_system
, ps
->encode_coding_system
);
4183 setup_process_coding_systems (proc
);
4185 PSET (p
, decoding_buf
, empty_unibyte_string
);
4186 p
->decoding_carryover
= 0;
4187 PSET (p
, encoding_buf
, empty_unibyte_string
);
4189 p
->inherit_coding_system_flag
4190 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4192 if (!NILP (ps
->log
))
4193 call3 (ps
->log
, server
, proc
,
4194 concat3 (build_string ("accept from "),
4195 (STRINGP (host
) ? host
: build_string ("-")),
4196 build_string ("\n")));
4198 if (!NILP (p
->sentinel
))
4199 exec_sentinel (proc
,
4200 concat3 (build_string ("open from "),
4201 (STRINGP (host
) ? host
: build_string ("-")),
4202 build_string ("\n")));
4205 /* This variable is different from waiting_for_input in keyboard.c.
4206 It is used to communicate to a lisp process-filter/sentinel (via the
4207 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4208 for user-input when that process-filter was called.
4209 waiting_for_input cannot be used as that is by definition 0 when
4210 lisp code is being evalled.
4211 This is also used in record_asynch_buffer_change.
4212 For that purpose, this must be 0
4213 when not inside wait_reading_process_output. */
4214 static int waiting_for_user_input_p
;
4217 wait_reading_process_output_unwind (Lisp_Object data
)
4219 waiting_for_user_input_p
= XINT (data
);
4223 /* This is here so breakpoints can be put on it. */
4225 wait_reading_process_output_1 (void)
4229 /* Read and dispose of subprocess output while waiting for timeout to
4230 elapse and/or keyboard input to be available.
4234 If negative, gobble data immediately available but don't wait for any.
4237 an additional duration to wait, measured in nanoseconds
4238 If TIME_LIMIT is zero, then:
4239 If NSECS == 0, there is no limit.
4240 If NSECS > 0, the timeout consists of NSECS only.
4241 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4244 0 to ignore keyboard input, or
4245 1 to return when input is available, or
4246 -1 meaning caller will actually read the input, so don't throw to
4247 the quit handler, or
4249 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4250 output that arrives.
4252 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4253 (and gobble terminal input into the buffer if any arrives).
4255 If WAIT_PROC is specified, wait until something arrives from that
4256 process. The return value is true if we read some input from
4259 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4260 (suspending output from other processes). A negative value
4261 means don't run any timers either.
4263 If WAIT_PROC is specified, then the function returns true if we
4264 received input from that process before the timeout elapsed.
4265 Otherwise, return true if we received input from any process. */
4268 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4270 Lisp_Object wait_for_cell
,
4271 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4273 register int channel
, nfds
;
4274 SELECT_TYPE Available
;
4275 SELECT_TYPE Writeok
;
4277 int check_delay
, no_avail
;
4280 EMACS_TIME timeout
, end_time
;
4281 int wait_channel
= -1;
4282 int got_some_input
= 0;
4283 ptrdiff_t count
= SPECPDL_INDEX ();
4285 FD_ZERO (&Available
);
4288 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4289 && !(CONSP (wait_proc
->status
)
4290 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4291 message ("Blocking call to accept-process-output with quit inhibited!!");
4293 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4294 if (wait_proc
!= NULL
)
4295 wait_channel
= wait_proc
->infd
;
4297 record_unwind_protect (wait_reading_process_output_unwind
,
4298 make_number (waiting_for_user_input_p
));
4299 waiting_for_user_input_p
= read_kbd
;
4306 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4307 time_limit
= TYPE_MAXIMUM (time_t);
4309 /* Since we may need to wait several times,
4310 compute the absolute time to return at. */
4311 if (time_limit
|| 0 < nsecs
)
4313 timeout
= make_emacs_time (time_limit
, nsecs
);
4314 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4319 int timeout_reduced_for_timers
= 0;
4321 /* If calling from keyboard input, do not quit
4322 since we want to return C-g as an input character.
4323 Otherwise, do pending quit if requested. */
4328 process_pending_signals ();
4331 /* Exit now if the cell we're waiting for became non-nil. */
4332 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4335 /* Compute time from now till when time limit is up */
4336 /* Exit if already run out */
4339 /* A negative timeout means
4340 gobble output available now
4341 but don't wait at all. */
4343 timeout
= make_emacs_time (0, 0);
4345 else if (time_limit
|| 0 < nsecs
)
4347 EMACS_TIME now
= current_emacs_time ();
4348 if (EMACS_TIME_LE (end_time
, now
))
4350 timeout
= sub_emacs_time (end_time
, now
);
4354 timeout
= make_emacs_time (100000, 0);
4357 /* Normally we run timers here.
4358 But not if wait_for_cell; in those cases,
4359 the wait is supposed to be short,
4360 and those callers cannot handle running arbitrary Lisp code here. */
4361 if (NILP (wait_for_cell
)
4362 && just_wait_proc
>= 0)
4364 EMACS_TIME timer_delay
;
4368 int old_timers_run
= timers_run
;
4369 struct buffer
*old_buffer
= current_buffer
;
4370 Lisp_Object old_window
= selected_window
;
4372 timer_delay
= timer_check ();
4374 /* If a timer has run, this might have changed buffers
4375 an alike. Make read_key_sequence aware of that. */
4376 if (timers_run
!= old_timers_run
4377 && (old_buffer
!= current_buffer
4378 || !EQ (old_window
, selected_window
))
4379 && waiting_for_user_input_p
== -1)
4380 record_asynch_buffer_change ();
4382 if (timers_run
!= old_timers_run
&& do_display
)
4383 /* We must retry, since a timer may have requeued itself
4384 and that could alter the time_delay. */
4385 redisplay_preserve_echo_area (9);
4389 while (!detect_input_pending ());
4391 /* If there is unread keyboard input, also return. */
4393 && requeued_events_pending_p ())
4396 /* A negative timeout means do not wait at all. */
4399 if (EMACS_TIME_VALID_P (timer_delay
))
4401 if (EMACS_TIME_LT (timer_delay
, timeout
))
4403 timeout
= timer_delay
;
4404 timeout_reduced_for_timers
= 1;
4409 /* This is so a breakpoint can be put here. */
4410 wait_reading_process_output_1 ();
4415 /* Cause C-g and alarm signals to take immediate action,
4416 and cause input available signals to zero out timeout.
4418 It is important that we do this before checking for process
4419 activity. If we get a SIGCHLD after the explicit checks for
4420 process activity, timeout is the only way we will know. */
4422 set_waiting_for_input (&timeout
);
4424 /* If status of something has changed, and no input is
4425 available, notify the user of the change right away. After
4426 this explicit check, we'll let the SIGCHLD handler zap
4427 timeout to get our attention. */
4428 if (update_tick
!= process_tick
)
4433 if (kbd_on_hold_p ())
4436 Atemp
= input_wait_mask
;
4439 timeout
= make_emacs_time (0, 0);
4440 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4442 #ifdef NON_BLOCKING_CONNECT
4443 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4447 NULL
, &timeout
, NULL
)
4450 /* It's okay for us to do this and then continue with
4451 the loop, since timeout has already been zeroed out. */
4452 clear_waiting_for_input ();
4453 status_notify (NULL
);
4454 if (do_display
) redisplay_preserve_echo_area (13);
4458 /* Don't wait for output from a non-running process. Just
4459 read whatever data has already been received. */
4460 if (wait_proc
&& wait_proc
->raw_status_new
)
4461 update_status (wait_proc
);
4463 && ! EQ (wait_proc
->status
, Qrun
)
4464 && ! EQ (wait_proc
->status
, Qconnect
))
4466 int nread
, total_nread
= 0;
4468 clear_waiting_for_input ();
4469 XSETPROCESS (proc
, wait_proc
);
4471 /* Read data from the process, until we exhaust it. */
4472 while (wait_proc
->infd
>= 0)
4474 nread
= read_process_output (proc
, wait_proc
->infd
);
4481 total_nread
+= nread
;
4485 else if (nread
== -1 && EIO
== errno
)
4489 else if (nread
== -1 && EAGAIN
== errno
)
4493 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4497 if (total_nread
> 0 && do_display
)
4498 redisplay_preserve_echo_area (10);
4503 /* Wait till there is something to do */
4505 if (wait_proc
&& just_wait_proc
)
4507 if (wait_proc
->infd
< 0) /* Terminated */
4509 FD_SET (wait_proc
->infd
, &Available
);
4513 else if (!NILP (wait_for_cell
))
4515 Available
= non_process_wait_mask
;
4522 Available
= non_keyboard_wait_mask
;
4524 Available
= input_wait_mask
;
4525 Writeok
= write_mask
;
4526 #ifdef SELECT_CANT_DO_WRITE_MASK
4531 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4534 /* If frame size has changed or the window is newly mapped,
4535 redisplay now, before we start to wait. There is a race
4536 condition here; if a SIGIO arrives between now and the select
4537 and indicates that a frame is trashed, the select may block
4538 displaying a trashed screen. */
4539 if (frame_garbaged
&& do_display
)
4541 clear_waiting_for_input ();
4542 redisplay_preserve_echo_area (11);
4544 set_waiting_for_input (&timeout
);
4547 /* Skip the `select' call if input is available and we're
4548 waiting for keyboard input or a cell change (which can be
4549 triggered by processing X events). In the latter case, set
4550 nfds to 1 to avoid breaking the loop. */
4552 if ((read_kbd
|| !NILP (wait_for_cell
))
4553 && detect_input_pending ())
4555 nfds
= read_kbd
? 0 : 1;
4562 #ifdef ADAPTIVE_READ_BUFFERING
4563 /* Set the timeout for adaptive read buffering if any
4564 process has non-zero read_output_skip and non-zero
4565 read_output_delay, and we are not reading output for a
4566 specific wait_channel. It is not executed if
4567 Vprocess_adaptive_read_buffering is nil. */
4568 if (process_output_skip
&& check_delay
> 0)
4570 int nsecs
= EMACS_NSECS (timeout
);
4571 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4572 nsecs
= READ_OUTPUT_DELAY_MAX
;
4573 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4575 proc
= chan_process
[channel
];
4578 /* Find minimum non-zero read_output_delay among the
4579 processes with non-zero read_output_skip. */
4580 if (XPROCESS (proc
)->read_output_delay
> 0)
4583 if (!XPROCESS (proc
)->read_output_skip
)
4585 FD_CLR (channel
, &Available
);
4586 XPROCESS (proc
)->read_output_skip
= 0;
4587 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4588 nsecs
= XPROCESS (proc
)->read_output_delay
;
4591 timeout
= make_emacs_time (0, nsecs
);
4592 process_output_skip
= 0;
4595 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4597 #elif defined (HAVE_NS)
4602 (max (max_process_desc
, max_input_desc
) + 1,
4604 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4605 NULL
, &timeout
, NULL
);
4608 /* GnuTLS buffers data internally. In lowat mode it leaves
4609 some data in the TCP buffers so that select works, but
4610 with custom pull/push functions we need to check if some
4611 data is available in the buffers manually. */
4616 /* We're not waiting on a specific process, so loop
4617 through all the channels and check for data.
4618 This is a workaround needed for some versions of
4619 the gnutls library -- 2.12.14 has been confirmed
4621 http://comments.gmane.org/gmane.emacs.devel/145074 */
4622 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4623 if (! NILP (chan_process
[channel
]))
4625 struct Lisp_Process
*p
=
4626 XPROCESS (chan_process
[channel
]);
4627 if (p
&& p
->gnutls_p
&& p
->infd
4628 && ((emacs_gnutls_record_check_pending
4633 FD_SET (p
->infd
, &Available
);
4639 /* Check this specific channel. */
4640 if (wait_proc
->gnutls_p
/* Check for valid process. */
4641 /* Do we have pending data? */
4642 && ((emacs_gnutls_record_check_pending
4643 (wait_proc
->gnutls_state
))
4647 /* Set to Available. */
4648 FD_SET (wait_proc
->infd
, &Available
);
4657 /* Make C-g and alarm signals set flags again */
4658 clear_waiting_for_input ();
4660 /* If we woke up due to SIGWINCH, actually change size now. */
4661 do_pending_window_change (0);
4663 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4664 /* We waited the full specified time, so return now. */
4668 if (xerrno
== EINTR
)
4670 else if (xerrno
== EBADF
)
4673 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4674 the child's closure of the pts gives the parent a SIGHUP, and
4675 the ptc file descriptor is automatically closed,
4676 yielding EBADF here or at select() call above.
4677 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4678 in m/ibmrt-aix.h), and here we just ignore the select error.
4679 Cleanup occurs c/o status_notify after SIGCLD. */
4680 no_avail
= 1; /* Cannot depend on values returned */
4686 error ("select error: %s", emacs_strerror (xerrno
));
4691 FD_ZERO (&Available
);
4695 #if 0 /* When polling is used, interrupt_input is 0,
4696 so get_input_pending should read the input.
4697 So this should not be needed. */
4698 /* If we are using polling for input,
4699 and we see input available, make it get read now.
4700 Otherwise it might not actually get read for a second.
4701 And on hpux, since we turn off polling in wait_reading_process_output,
4702 it might never get read at all if we don't spend much time
4703 outside of wait_reading_process_output. */
4704 if (read_kbd
&& interrupt_input
4705 && keyboard_bit_set (&Available
)
4706 && input_polling_used ())
4707 kill (getpid (), SIGALRM
);
4710 /* Check for keyboard input */
4711 /* If there is any, return immediately
4712 to give it higher priority than subprocesses */
4716 int old_timers_run
= timers_run
;
4717 struct buffer
*old_buffer
= current_buffer
;
4718 Lisp_Object old_window
= selected_window
;
4721 if (detect_input_pending_run_timers (do_display
))
4723 swallow_events (do_display
);
4724 if (detect_input_pending_run_timers (do_display
))
4728 /* If a timer has run, this might have changed buffers
4729 an alike. Make read_key_sequence aware of that. */
4730 if (timers_run
!= old_timers_run
4731 && waiting_for_user_input_p
== -1
4732 && (old_buffer
!= current_buffer
4733 || !EQ (old_window
, selected_window
)))
4734 record_asynch_buffer_change ();
4740 /* If there is unread keyboard input, also return. */
4742 && requeued_events_pending_p ())
4745 /* If we are not checking for keyboard input now,
4746 do process events (but don't run any timers).
4747 This is so that X events will be processed.
4748 Otherwise they may have to wait until polling takes place.
4749 That would causes delays in pasting selections, for example.
4751 (We used to do this only if wait_for_cell.) */
4752 if (read_kbd
== 0 && detect_input_pending ())
4754 swallow_events (do_display
);
4755 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4756 if (detect_input_pending ())
4761 /* Exit now if the cell we're waiting for became non-nil. */
4762 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4766 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4767 go read it. This can happen with X on BSD after logging out.
4768 In that case, there really is no input and no SIGIO,
4769 but select says there is input. */
4771 if (read_kbd
&& interrupt_input
4772 && keyboard_bit_set (&Available
) && ! noninteractive
)
4773 kill (getpid (), SIGIO
);
4777 got_some_input
|= nfds
> 0;
4779 /* If checking input just got us a size-change event from X,
4780 obey it now if we should. */
4781 if (read_kbd
|| ! NILP (wait_for_cell
))
4782 do_pending_window_change (0);
4784 /* Check for data from a process. */
4785 if (no_avail
|| nfds
== 0)
4788 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4790 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4791 if (FD_ISSET (channel
, &Available
)
4793 && (d
->condition
& FOR_READ
) != 0)
4794 d
->func (channel
, d
->data
, 1);
4795 if (FD_ISSET (channel
, &write_mask
)
4797 && (d
->condition
& FOR_WRITE
) != 0)
4798 d
->func (channel
, d
->data
, 0);
4801 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4803 if (FD_ISSET (channel
, &Available
)
4804 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4805 && !FD_ISSET (channel
, &non_process_wait_mask
))
4809 /* If waiting for this channel, arrange to return as
4810 soon as no more input to be processed. No more
4812 if (wait_channel
== channel
)
4818 proc
= chan_process
[channel
];
4822 /* If this is a server stream socket, accept connection. */
4823 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4825 server_accept_connection (proc
, channel
);
4829 /* Read data from the process, starting with our
4830 buffered-ahead character if we have one. */
4832 nread
= read_process_output (proc
, channel
);
4835 /* Since read_process_output can run a filter,
4836 which can call accept-process-output,
4837 don't try to read from any other processes
4838 before doing the select again. */
4839 FD_ZERO (&Available
);
4842 redisplay_preserve_echo_area (12);
4845 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4848 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4849 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4851 else if (nread
== -1 && errno
== EAGAIN
)
4855 else if (nread
== -1 && errno
== EAGAIN
)
4857 /* Note that we cannot distinguish between no input
4858 available now and a closed pipe.
4859 With luck, a closed pipe will be accompanied by
4860 subprocess termination and SIGCHLD. */
4861 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4863 #endif /* O_NDELAY */
4864 #endif /* O_NONBLOCK */
4866 /* On some OSs with ptys, when the process on one end of
4867 a pty exits, the other end gets an error reading with
4868 errno = EIO instead of getting an EOF (0 bytes read).
4869 Therefore, if we get an error reading and errno =
4870 EIO, just continue, because the child process has
4871 exited and should clean itself up soon (e.g. when we
4874 However, it has been known to happen that the SIGCHLD
4875 got lost. So raise the signal again just in case.
4877 else if (nread
== -1 && errno
== EIO
)
4879 struct Lisp_Process
*p
= XPROCESS (proc
);
4881 /* Clear the descriptor now, so we only raise the
4883 FD_CLR (channel
, &input_wait_mask
);
4884 FD_CLR (channel
, &non_keyboard_wait_mask
);
4888 /* If the EIO occurs on a pty, sigchld_handler's
4889 waitpid() will not find the process object to
4890 delete. Do it here. */
4891 p
->tick
= ++process_tick
;
4892 PSET (p
, status
, Qfailed
);
4895 kill (getpid (), SIGCHLD
);
4897 #endif /* HAVE_PTYS */
4898 /* If we can detect process termination, don't consider the
4899 process gone just because its pipe is closed. */
4901 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4906 /* Preserve status of processes already terminated. */
4907 XPROCESS (proc
)->tick
= ++process_tick
;
4908 deactivate_process (proc
);
4909 if (XPROCESS (proc
)->raw_status_new
)
4910 update_status (XPROCESS (proc
));
4911 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4912 PSET (XPROCESS (proc
), status
,
4913 Fcons (Qexit
, Fcons (make_number (256), Qnil
)));
4916 #ifdef NON_BLOCKING_CONNECT
4917 if (FD_ISSET (channel
, &Writeok
)
4918 && FD_ISSET (channel
, &connect_wait_mask
))
4920 struct Lisp_Process
*p
;
4922 FD_CLR (channel
, &connect_wait_mask
);
4923 FD_CLR (channel
, &write_mask
);
4924 if (--num_pending_connects
< 0)
4927 proc
= chan_process
[channel
];
4931 p
= XPROCESS (proc
);
4934 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4935 So only use it on systems where it is known to work. */
4937 socklen_t xlen
= sizeof (xerrno
);
4938 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4943 struct sockaddr pname
;
4944 int pnamelen
= sizeof (pname
);
4946 /* If connection failed, getpeername will fail. */
4948 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4950 /* Obtain connect failure code through error slippage. */
4953 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4960 p
->tick
= ++process_tick
;
4962 Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
)));
4963 deactivate_process (proc
);
4967 PSET (p
, status
, Qrun
);
4968 /* Execute the sentinel here. If we had relied on
4969 status_notify to do it later, it will read input
4970 from the process before calling the sentinel. */
4971 exec_sentinel (proc
, build_string ("open\n"));
4972 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4974 FD_SET (p
->infd
, &input_wait_mask
);
4975 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4979 #endif /* NON_BLOCKING_CONNECT */
4980 } /* end for each file descriptor */
4981 } /* end while exit conditions not met */
4983 unbind_to (count
, Qnil
);
4985 /* If calling from keyboard input, do not quit
4986 since we want to return C-g as an input character.
4987 Otherwise, do pending quit if requested. */
4990 /* Prevent input_pending from remaining set if we quit. */
4991 clear_input_pending ();
4995 return got_some_input
;
4998 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5001 read_process_output_call (Lisp_Object fun_and_args
)
5003 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5007 read_process_output_error_handler (Lisp_Object error_val
)
5009 cmd_error_internal (error_val
, "error in process filter: ");
5011 update_echo_area ();
5012 Fsleep_for (make_number (2), Qnil
);
5016 /* Read pending output from the process channel,
5017 starting with our buffered-ahead character if we have one.
5018 Yield number of decoded characters read.
5020 This function reads at most 4096 characters.
5021 If you want to read all available subprocess output,
5022 you must call it repeatedly until it returns zero.
5024 The characters read are decoded according to PROC's coding-system
5028 read_process_output (Lisp_Object proc
, register int channel
)
5030 register ssize_t nbytes
;
5032 register Lisp_Object outstream
;
5033 register struct Lisp_Process
*p
= XPROCESS (proc
);
5034 register ptrdiff_t opoint
;
5035 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5036 int carryover
= p
->decoding_carryover
;
5038 ptrdiff_t count
= SPECPDL_INDEX ();
5039 Lisp_Object odeactivate
;
5041 chars
= alloca (carryover
+ readmax
);
5043 /* See the comment above. */
5044 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5046 #ifdef DATAGRAM_SOCKETS
5047 /* We have a working select, so proc_buffered_char is always -1. */
5048 if (DATAGRAM_CHAN_P (channel
))
5050 socklen_t len
= datagram_address
[channel
].len
;
5051 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5052 0, datagram_address
[channel
].sa
, &len
);
5057 int buffered
= 0 <= proc_buffered_char
[channel
];
5060 chars
[carryover
] = proc_buffered_char
[channel
];
5061 proc_buffered_char
[channel
] = -1;
5065 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5066 readmax
- buffered
);
5069 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5070 readmax
- buffered
);
5071 #ifdef ADAPTIVE_READ_BUFFERING
5072 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5074 int delay
= p
->read_output_delay
;
5077 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5080 process_output_delay_count
++;
5081 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5084 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5086 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5088 process_output_delay_count
--;
5090 p
->read_output_delay
= delay
;
5093 p
->read_output_skip
= 1;
5094 process_output_skip
= 1;
5099 nbytes
+= buffered
&& nbytes
<= 0;
5102 p
->decoding_carryover
= 0;
5104 /* At this point, NBYTES holds number of bytes just received
5105 (including the one in proc_buffered_char[channel]). */
5108 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5110 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5113 /* Now set NBYTES how many bytes we must decode. */
5114 nbytes
+= carryover
;
5116 odeactivate
= Vdeactivate_mark
;
5117 /* There's no good reason to let process filters change the current
5118 buffer, and many callers of accept-process-output, sit-for, and
5119 friends don't expect current-buffer to be changed from under them. */
5120 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5122 /* Read and dispose of the process output. */
5123 outstream
= p
->filter
;
5124 if (!NILP (outstream
))
5127 int outer_running_asynch_code
= running_asynch_code
;
5128 int waiting
= waiting_for_user_input_p
;
5130 /* No need to gcpro these, because all we do with them later
5131 is test them for EQness, and none of them should be a string. */
5133 Lisp_Object obuffer
, okeymap
;
5134 XSETBUFFER (obuffer
, current_buffer
);
5135 okeymap
= BVAR (current_buffer
, keymap
);
5138 /* We inhibit quit here instead of just catching it so that
5139 hitting ^G when a filter happens to be running won't screw
5141 specbind (Qinhibit_quit
, Qt
);
5142 specbind (Qlast_nonmenu_event
, Qt
);
5144 /* In case we get recursively called,
5145 and we already saved the match data nonrecursively,
5146 save the same match data in safely recursive fashion. */
5147 if (outer_running_asynch_code
)
5150 /* Don't clobber the CURRENT match data, either! */
5151 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5152 restore_search_regs ();
5153 record_unwind_save_match_data ();
5154 Fset_match_data (tem
, Qt
);
5157 /* For speed, if a search happens within this code,
5158 save the match data in a special nonrecursive fashion. */
5159 running_asynch_code
= 1;
5161 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5162 text
= coding
->dst_object
;
5163 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5164 /* A new coding system might be found. */
5165 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5167 PSET (p
, decode_coding_system
, Vlast_coding_system_used
);
5169 /* Don't call setup_coding_system for
5170 proc_decode_coding_system[channel] here. It is done in
5171 detect_coding called via decode_coding above. */
5173 /* If a coding system for encoding is not yet decided, we set
5174 it as the same as coding-system for decoding.
5176 But, before doing that we must check if
5177 proc_encode_coding_system[p->outfd] surely points to a
5178 valid memory because p->outfd will be changed once EOF is
5179 sent to the process. */
5180 if (NILP (p
->encode_coding_system
)
5181 && proc_encode_coding_system
[p
->outfd
])
5183 PSET (p
, encode_coding_system
,
5184 coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5185 setup_coding_system (p
->encode_coding_system
,
5186 proc_encode_coding_system
[p
->outfd
]);
5190 if (coding
->carryover_bytes
> 0)
5192 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5193 PSET (p
, decoding_buf
, make_uninit_string (coding
->carryover_bytes
));
5194 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5195 coding
->carryover_bytes
);
5196 p
->decoding_carryover
= coding
->carryover_bytes
;
5198 if (SBYTES (text
) > 0)
5199 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5200 sometimes it's simply wrong to wrap (e.g. when called from
5201 accept-process-output). */
5202 internal_condition_case_1 (read_process_output_call
,
5204 Fcons (proc
, Fcons (text
, Qnil
))),
5205 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5206 read_process_output_error_handler
);
5208 /* If we saved the match data nonrecursively, restore it now. */
5209 restore_search_regs ();
5210 running_asynch_code
= outer_running_asynch_code
;
5212 /* Restore waiting_for_user_input_p as it was
5213 when we were called, in case the filter clobbered it. */
5214 waiting_for_user_input_p
= waiting
;
5216 #if 0 /* Call record_asynch_buffer_change unconditionally,
5217 because we might have changed minor modes or other things
5218 that affect key bindings. */
5219 if (! EQ (Fcurrent_buffer (), obuffer
)
5220 || ! EQ (current_buffer
->keymap
, okeymap
))
5222 /* But do it only if the caller is actually going to read events.
5223 Otherwise there's no need to make him wake up, and it could
5224 cause trouble (for example it would make sit_for return). */
5225 if (waiting_for_user_input_p
== -1)
5226 record_asynch_buffer_change ();
5229 /* If no filter, write into buffer if it isn't dead. */
5230 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5232 Lisp_Object old_read_only
;
5233 ptrdiff_t old_begv
, old_zv
;
5234 ptrdiff_t old_begv_byte
, old_zv_byte
;
5235 ptrdiff_t before
, before_byte
;
5236 ptrdiff_t opoint_byte
;
5240 Fset_buffer (p
->buffer
);
5242 opoint_byte
= PT_BYTE
;
5243 old_read_only
= BVAR (current_buffer
, read_only
);
5246 old_begv_byte
= BEGV_BYTE
;
5247 old_zv_byte
= ZV_BYTE
;
5249 BSET (current_buffer
, read_only
, Qnil
);
5251 /* Insert new output into buffer
5252 at the current end-of-output marker,
5253 thus preserving logical ordering of input and output. */
5254 if (XMARKER (p
->mark
)->buffer
)
5255 SET_PT_BOTH (clip_to_bounds (BEGV
,
5256 marker_position (p
->mark
), ZV
),
5257 clip_to_bounds (BEGV_BYTE
,
5258 marker_byte_position (p
->mark
),
5261 SET_PT_BOTH (ZV
, ZV_BYTE
);
5263 before_byte
= PT_BYTE
;
5265 /* If the output marker is outside of the visible region, save
5266 the restriction and widen. */
5267 if (! (BEGV
<= PT
&& PT
<= ZV
))
5270 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5271 text
= coding
->dst_object
;
5272 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5273 /* A new coding system might be found. See the comment in the
5274 similar code in the previous `if' block. */
5275 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5277 PSET (p
, decode_coding_system
, Vlast_coding_system_used
);
5278 if (NILP (p
->encode_coding_system
)
5279 && proc_encode_coding_system
[p
->outfd
])
5281 PSET (p
, encode_coding_system
,
5282 coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5283 setup_coding_system (p
->encode_coding_system
,
5284 proc_encode_coding_system
[p
->outfd
]);
5287 if (coding
->carryover_bytes
> 0)
5289 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5290 PSET (p
, decoding_buf
, make_uninit_string (coding
->carryover_bytes
));
5291 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5292 coding
->carryover_bytes
);
5293 p
->decoding_carryover
= coding
->carryover_bytes
;
5295 /* Adjust the multibyteness of TEXT to that of the buffer. */
5296 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5297 != ! STRING_MULTIBYTE (text
))
5298 text
= (STRING_MULTIBYTE (text
)
5299 ? Fstring_as_unibyte (text
)
5300 : Fstring_to_multibyte (text
));
5301 /* Insert before markers in case we are inserting where
5302 the buffer's mark is, and the user's next command is Meta-y. */
5303 insert_from_string_before_markers (text
, 0, 0,
5304 SCHARS (text
), SBYTES (text
), 0);
5306 /* Make sure the process marker's position is valid when the
5307 process buffer is changed in the signal_after_change above.
5308 W3 is known to do that. */
5309 if (BUFFERP (p
->buffer
)
5310 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5311 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5313 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5315 update_mode_lines
++;
5317 /* Make sure opoint and the old restrictions
5318 float ahead of any new text just as point would. */
5319 if (opoint
>= before
)
5321 opoint
+= PT
- before
;
5322 opoint_byte
+= PT_BYTE
- before_byte
;
5324 if (old_begv
> before
)
5326 old_begv
+= PT
- before
;
5327 old_begv_byte
+= PT_BYTE
- before_byte
;
5329 if (old_zv
>= before
)
5331 old_zv
+= PT
- before
;
5332 old_zv_byte
+= PT_BYTE
- before_byte
;
5335 /* If the restriction isn't what it should be, set it. */
5336 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5337 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5340 BSET (current_buffer
, read_only
, old_read_only
);
5341 SET_PT_BOTH (opoint
, opoint_byte
);
5343 /* Handling the process output should not deactivate the mark. */
5344 Vdeactivate_mark
= odeactivate
;
5346 unbind_to (count
, Qnil
);
5350 /* Sending data to subprocess */
5352 static jmp_buf send_process_frame
;
5353 static Lisp_Object process_sent_to
;
5355 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5356 static _Noreturn
void send_process_trap (int);
5360 send_process_trap (int ignore
)
5362 SIGNAL_THREAD_CHECK (SIGPIPE
);
5363 sigunblock (sigmask (SIGPIPE
));
5364 longjmp (send_process_frame
, 1);
5367 /* In send_process, when a write fails temporarily,
5368 wait_reading_process_output is called. It may execute user code,
5369 e.g. timers, that attempts to write new data to the same process.
5370 We must ensure that data is sent in the right order, and not
5371 interspersed half-completed with other writes (Bug#10815). This is
5372 handled by the write_queue element of struct process. It is a list
5373 with each entry having the form
5375 (string . (offset . length))
5377 where STRING is a lisp string, OFFSET is the offset into the
5378 string's byte sequence from which we should begin to send, and
5379 LENGTH is the number of bytes left to send. */
5381 /* Create a new entry in write_queue.
5382 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5383 BUF is a pointer to the string sequence of the input_obj or a C
5384 string in case of Qt or Qnil. */
5387 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5388 const char *buf
, ptrdiff_t len
, int front
)
5391 Lisp_Object entry
, obj
;
5393 if (STRINGP (input_obj
))
5395 offset
= buf
- SSDATA (input_obj
);
5401 obj
= make_unibyte_string (buf
, len
);
5404 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5407 PSET (p
, write_queue
, Fcons (entry
, p
->write_queue
));
5409 PSET (p
, write_queue
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5412 /* Remove the first element in the write_queue of process P, put its
5413 contents in OBJ, BUF and LEN, and return non-zero. If the
5414 write_queue is empty, return zero. */
5417 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5418 const char **buf
, ptrdiff_t *len
)
5420 Lisp_Object entry
, offset_length
;
5423 if (NILP (p
->write_queue
))
5426 entry
= XCAR (p
->write_queue
);
5427 PSET (p
, write_queue
, XCDR (p
->write_queue
));
5429 *obj
= XCAR (entry
);
5430 offset_length
= XCDR (entry
);
5432 *len
= XINT (XCDR (offset_length
));
5433 offset
= XINT (XCAR (offset_length
));
5434 *buf
= SSDATA (*obj
) + offset
;
5439 /* Send some data to process PROC.
5440 BUF is the beginning of the data; LEN is the number of characters.
5441 OBJECT is the Lisp object that the data comes from. If OBJECT is
5442 nil or t, it means that the data comes from C string.
5444 If OBJECT is not nil, the data is encoded by PROC's coding-system
5445 for encoding before it is sent.
5447 This function can evaluate Lisp code and can garbage collect. */
5450 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5451 volatile ptrdiff_t len
, volatile Lisp_Object object
)
5453 /* Use volatile to protect variables from being clobbered by longjmp. */
5454 struct Lisp_Process
*p
= XPROCESS (proc
);
5456 struct coding_system
*coding
;
5457 void (*volatile old_sigpipe
) (int);
5459 if (p
->raw_status_new
)
5461 if (! EQ (p
->status
, Qrun
))
5462 error ("Process %s not running", SDATA (p
->name
));
5464 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5466 coding
= proc_encode_coding_system
[p
->outfd
];
5467 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5469 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5470 || (BUFFERP (object
)
5471 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5474 PSET (p
, encode_coding_system
,
5475 complement_process_encoding_system (p
->encode_coding_system
));
5476 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5478 /* The coding system for encoding was changed to raw-text
5479 because we sent a unibyte text previously. Now we are
5480 sending a multibyte text, thus we must encode it by the
5481 original coding system specified for the current process.
5483 Another reason we come here is that the coding system
5484 was just complemented and a new one was returned by
5485 complement_process_encoding_system. */
5486 setup_coding_system (p
->encode_coding_system
, coding
);
5487 Vlast_coding_system_used
= p
->encode_coding_system
;
5489 coding
->src_multibyte
= 1;
5493 coding
->src_multibyte
= 0;
5494 /* For sending a unibyte text, character code conversion should
5495 not take place but EOL conversion should. So, setup raw-text
5496 or one of the subsidiary if we have not yet done it. */
5497 if (CODING_REQUIRE_ENCODING (coding
))
5499 if (CODING_REQUIRE_FLUSHING (coding
))
5501 /* But, before changing the coding, we must flush out data. */
5502 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5503 send_process (proc
, "", 0, Qt
);
5504 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5506 setup_coding_system (raw_text_coding_system
5507 (Vlast_coding_system_used
),
5509 coding
->src_multibyte
= 0;
5512 coding
->dst_multibyte
= 0;
5514 if (CODING_REQUIRE_ENCODING (coding
))
5516 coding
->dst_object
= Qt
;
5517 if (BUFFERP (object
))
5519 ptrdiff_t from_byte
, from
, to
;
5520 ptrdiff_t save_pt
, save_pt_byte
;
5521 struct buffer
*cur
= current_buffer
;
5523 set_buffer_internal (XBUFFER (object
));
5524 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5526 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5527 from
= BYTE_TO_CHAR (from_byte
);
5528 to
= BYTE_TO_CHAR (from_byte
+ len
);
5529 TEMP_SET_PT_BOTH (from
, from_byte
);
5530 encode_coding_object (coding
, object
, from
, from_byte
,
5531 to
, from_byte
+ len
, Qt
);
5532 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5533 set_buffer_internal (cur
);
5535 else if (STRINGP (object
))
5537 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5538 SBYTES (object
), Qt
);
5542 coding
->dst_object
= make_unibyte_string (buf
, len
);
5543 coding
->produced
= len
;
5546 len
= coding
->produced
;
5547 object
= coding
->dst_object
;
5548 buf
= SSDATA (object
);
5551 if (pty_max_bytes
== 0)
5553 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5554 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5555 if (pty_max_bytes
< 0)
5556 pty_max_bytes
= 250;
5558 pty_max_bytes
= 250;
5560 /* Deduct one, to leave space for the eof. */
5564 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5565 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5566 when returning with longjmp despite being declared volatile. */
5567 if (!setjmp (send_process_frame
))
5569 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5570 process_sent_to
= proc
;
5572 /* If there is already data in the write_queue, put the new data
5573 in the back of queue. Otherwise, ignore it. */
5574 if (!NILP (p
->write_queue
))
5575 write_queue_push (p
, object
, buf
, len
, 0);
5577 do /* while !NILP (p->write_queue) */
5579 ptrdiff_t cur_len
= -1;
5580 const char *cur_buf
;
5581 Lisp_Object cur_object
;
5583 /* If write_queue is empty, ignore it. */
5584 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5588 cur_object
= object
;
5593 /* Send this batch, using one or more write calls. */
5594 ptrdiff_t written
= 0;
5595 int outfd
= p
->outfd
;
5596 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5597 #ifdef DATAGRAM_SOCKETS
5598 if (DATAGRAM_CHAN_P (outfd
))
5600 rv
= sendto (outfd
, cur_buf
, cur_len
,
5601 0, datagram_address
[outfd
].sa
,
5602 datagram_address
[outfd
].len
);
5605 else if (errno
== EMSGSIZE
)
5607 signal (SIGPIPE
, old_sigpipe
);
5608 report_file_error ("sending datagram",
5609 Fcons (proc
, Qnil
));
5617 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5620 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5621 rv
= (written
? 0 : -1);
5622 #ifdef ADAPTIVE_READ_BUFFERING
5623 if (p
->read_output_delay
> 0
5624 && p
->adaptive_read_buffering
== 1)
5626 p
->read_output_delay
= 0;
5627 process_output_delay_count
--;
5628 p
->read_output_skip
= 0;
5632 signal (SIGPIPE
, old_sigpipe
);
5638 || errno
== EWOULDBLOCK
5644 /* Buffer is full. Wait, accepting input;
5645 that may allow the program
5646 to finish doing output and read more. */
5648 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5649 /* A gross hack to work around a bug in FreeBSD.
5650 In the following sequence, read(2) returns
5654 write(2) 954 bytes, get EAGAIN
5655 read(2) 1024 bytes in process_read_output
5656 read(2) 11 bytes in process_read_output
5658 That is, read(2) returns more bytes than have
5659 ever been written successfully. The 1033 bytes
5660 read are the 1022 bytes written successfully
5661 after processing (for example with CRs added if
5662 the terminal is set up that way which it is
5663 here). The same bytes will be seen again in a
5664 later read(2), without the CRs. */
5666 if (errno
== EAGAIN
)
5669 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5671 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5673 /* Put what we should have written in wait_queue. */
5674 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5675 wait_reading_process_output (0, 20 * 1000 * 1000,
5676 0, 0, Qnil
, NULL
, 0);
5677 /* Reread queue, to see what is left. */
5681 /* This is a real error. */
5682 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5688 while (!NILP (p
->write_queue
));
5692 signal (SIGPIPE
, old_sigpipe
);
5693 proc
= process_sent_to
;
5694 p
= XPROCESS (proc
);
5695 p
->raw_status_new
= 0;
5696 PSET (p
, status
, Fcons (Qexit
, Fcons (make_number (256), Qnil
)));
5697 p
->tick
= ++process_tick
;
5698 deactivate_process (proc
);
5699 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5703 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5705 doc
: /* Send current contents of region as input to PROCESS.
5706 PROCESS may be a process, a buffer, the name of a process or buffer, or
5707 nil, indicating the current buffer's process.
5708 Called from program, takes three arguments, PROCESS, START and END.
5709 If the region is more than 500 characters long,
5710 it is sent in several bunches. This may happen even for shorter regions.
5711 Output from processes can arrive in between bunches. */)
5712 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5715 ptrdiff_t start1
, end1
;
5717 proc
= get_process (process
);
5718 validate_region (&start
, &end
);
5720 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5721 move_gap (XINT (start
));
5723 start1
= CHAR_TO_BYTE (XINT (start
));
5724 end1
= CHAR_TO_BYTE (XINT (end
));
5725 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5726 Fcurrent_buffer ());
5731 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5733 doc
: /* Send PROCESS the contents of STRING as input.
5734 PROCESS may be a process, a buffer, the name of a process or buffer, or
5735 nil, indicating the current buffer's process.
5736 If STRING is more than 500 characters long,
5737 it is sent in several bunches. This may happen even for shorter strings.
5738 Output from processes can arrive in between bunches. */)
5739 (Lisp_Object process
, Lisp_Object string
)
5742 CHECK_STRING (string
);
5743 proc
= get_process (process
);
5744 send_process (proc
, SSDATA (string
),
5745 SBYTES (string
), string
);
5749 /* Return the foreground process group for the tty/pty that
5750 the process P uses. */
5752 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5757 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5760 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5761 master side. Try the slave side. */
5762 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5766 ioctl (fd
, TIOCGPGRP
, &gid
);
5770 #endif /* defined (TIOCGPGRP ) */
5775 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5776 Sprocess_running_child_p
, 0, 1, 0,
5777 doc
: /* Return t if PROCESS has given the terminal to a child.
5778 If the operating system does not make it possible to find out,
5779 return t unconditionally. */)
5780 (Lisp_Object process
)
5782 /* Initialize in case ioctl doesn't exist or gives an error,
5783 in a way that will cause returning t. */
5786 struct Lisp_Process
*p
;
5788 proc
= get_process (process
);
5789 p
= XPROCESS (proc
);
5791 if (!EQ (p
->type
, Qreal
))
5792 error ("Process %s is not a subprocess",
5795 error ("Process %s is not active",
5798 gid
= emacs_get_tty_pgrp (p
);
5805 /* send a signal number SIGNO to PROCESS.
5806 If CURRENT_GROUP is t, that means send to the process group
5807 that currently owns the terminal being used to communicate with PROCESS.
5808 This is used for various commands in shell mode.
5809 If CURRENT_GROUP is lambda, that means send to the process group
5810 that currently owns the terminal, but only if it is NOT the shell itself.
5812 If NOMSG is zero, insert signal-announcements into process's buffers
5815 If we can, we try to signal PROCESS by sending control characters
5816 down the pty. This allows us to signal inferiors who have changed
5817 their uid, for which killpg would return an EPERM error. */
5820 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5824 register struct Lisp_Process
*p
;
5828 proc
= get_process (process
);
5829 p
= XPROCESS (proc
);
5831 if (!EQ (p
->type
, Qreal
))
5832 error ("Process %s is not a subprocess",
5835 error ("Process %s is not active",
5839 current_group
= Qnil
;
5841 /* If we are using pgrps, get a pgrp number and make it negative. */
5842 if (NILP (current_group
))
5843 /* Send the signal to the shell's process group. */
5847 #ifdef SIGNALS_VIA_CHARACTERS
5848 /* If possible, send signals to the entire pgrp
5849 by sending an input character to it. */
5852 cc_t
*sig_char
= NULL
;
5854 tcgetattr (p
->infd
, &t
);
5859 sig_char
= &t
.c_cc
[VINTR
];
5863 sig_char
= &t
.c_cc
[VQUIT
];
5867 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5868 sig_char
= &t
.c_cc
[VSWTCH
];
5870 sig_char
= &t
.c_cc
[VSUSP
];
5875 if (sig_char
&& *sig_char
!= CDISABLE
)
5877 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5880 /* If we can't send the signal with a character,
5881 fall through and send it another way. */
5883 /* The code above may fall through if it can't
5884 handle the signal. */
5885 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5888 /* Get the current pgrp using the tty itself, if we have that.
5889 Otherwise, use the pty to get the pgrp.
5890 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5891 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5892 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5893 His patch indicates that if TIOCGPGRP returns an error, then
5894 we should just assume that p->pid is also the process group id. */
5896 gid
= emacs_get_tty_pgrp (p
);
5899 /* If we can't get the information, assume
5900 the shell owns the tty. */
5903 /* It is not clear whether anything really can set GID to -1.
5904 Perhaps on some system one of those ioctls can or could do so.
5905 Or perhaps this is vestigial. */
5908 #else /* ! defined (TIOCGPGRP ) */
5909 /* Can't select pgrps on this system, so we know that
5910 the child itself heads the pgrp. */
5912 #endif /* ! defined (TIOCGPGRP ) */
5914 /* If current_group is lambda, and the shell owns the terminal,
5915 don't send any signal. */
5916 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5924 p
->raw_status_new
= 0;
5925 PSET (p
, status
, Qrun
);
5926 p
->tick
= ++process_tick
;
5929 status_notify (NULL
);
5930 redisplay_preserve_echo_area (13);
5933 #endif /* ! defined (SIGCONT) */
5937 flush_pending_output (p
->infd
);
5941 /* If we don't have process groups, send the signal to the immediate
5942 subprocess. That isn't really right, but it's better than any
5943 obvious alternative. */
5946 kill (p
->pid
, signo
);
5950 /* gid may be a pid, or minus a pgrp's number */
5952 if (!NILP (current_group
))
5954 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5955 EMACS_KILLPG (gid
, signo
);
5962 #else /* ! defined (TIOCSIGSEND) */
5963 EMACS_KILLPG (gid
, signo
);
5964 #endif /* ! defined (TIOCSIGSEND) */
5967 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5968 doc
: /* Interrupt process PROCESS.
5969 PROCESS may be a process, a buffer, or the name of a process or buffer.
5970 No arg or nil means current buffer's process.
5971 Second arg CURRENT-GROUP non-nil means send signal to
5972 the current process-group of the process's controlling terminal
5973 rather than to the process's own process group.
5974 If the process is a shell, this means interrupt current subjob
5975 rather than the shell.
5977 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5978 don't send the signal. */)
5979 (Lisp_Object process
, Lisp_Object current_group
)
5981 process_send_signal (process
, SIGINT
, current_group
, 0);
5985 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5986 doc
: /* Kill process PROCESS. May be process or name of one.
5987 See function `interrupt-process' for more details on usage. */)
5988 (Lisp_Object process
, Lisp_Object current_group
)
5990 process_send_signal (process
, SIGKILL
, current_group
, 0);
5994 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5995 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5996 See function `interrupt-process' for more details on usage. */)
5997 (Lisp_Object process
, Lisp_Object current_group
)
5999 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6003 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6004 doc
: /* Stop process PROCESS. May be process or name of one.
6005 See function `interrupt-process' for more details on usage.
6006 If PROCESS is a network or serial process, inhibit handling of incoming
6008 (Lisp_Object process
, Lisp_Object current_group
)
6010 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6012 struct Lisp_Process
*p
;
6014 p
= XPROCESS (process
);
6015 if (NILP (p
->command
)
6018 FD_CLR (p
->infd
, &input_wait_mask
);
6019 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6021 PSET (p
, command
, Qt
);
6025 error ("No SIGTSTP support");
6027 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6032 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6033 doc
: /* Continue process PROCESS. May be process or name of one.
6034 See function `interrupt-process' for more details on usage.
6035 If PROCESS is a network or serial process, resume handling of incoming
6037 (Lisp_Object process
, Lisp_Object current_group
)
6039 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6041 struct Lisp_Process
*p
;
6043 p
= XPROCESS (process
);
6044 if (EQ (p
->command
, Qt
)
6046 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6048 FD_SET (p
->infd
, &input_wait_mask
);
6049 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6051 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6052 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6053 #else /* not WINDOWSNT */
6054 tcflush (p
->infd
, TCIFLUSH
);
6055 #endif /* not WINDOWSNT */
6057 PSET (p
, command
, Qnil
);
6061 process_send_signal (process
, SIGCONT
, current_group
, 0);
6063 error ("No SIGCONT support");
6068 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6069 2, 2, "sProcess (name or number): \nnSignal code: ",
6070 doc
: /* Send PROCESS the signal with code SIGCODE.
6071 PROCESS may also be a number specifying the process id of the
6072 process to signal; in this case, the process need not be a child of
6074 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6075 (Lisp_Object process
, Lisp_Object sigcode
)
6079 if (STRINGP (process
))
6081 Lisp_Object tem
= Fget_process (process
);
6084 Lisp_Object process_number
=
6085 string_to_number (SSDATA (process
), 10, 1);
6086 if (INTEGERP (process_number
) || FLOATP (process_number
))
6087 tem
= process_number
;
6091 else if (!NUMBERP (process
))
6092 process
= get_process (process
);
6097 if (NUMBERP (process
))
6098 CONS_TO_INTEGER (process
, pid_t
, pid
);
6101 CHECK_PROCESS (process
);
6102 pid
= XPROCESS (process
)->pid
;
6104 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6107 #define parse_signal(NAME, VALUE) \
6108 else if (!xstrcasecmp (name, NAME)) \
6109 XSETINT (sigcode, VALUE)
6111 if (INTEGERP (sigcode
))
6112 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6117 CHECK_SYMBOL (sigcode
);
6118 name
= SSDATA (SYMBOL_NAME (sigcode
));
6120 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6126 parse_signal ("usr1", SIGUSR1
);
6129 parse_signal ("usr2", SIGUSR2
);
6132 parse_signal ("term", SIGTERM
);
6135 parse_signal ("hup", SIGHUP
);
6138 parse_signal ("int", SIGINT
);
6141 parse_signal ("quit", SIGQUIT
);
6144 parse_signal ("ill", SIGILL
);
6147 parse_signal ("abrt", SIGABRT
);
6150 parse_signal ("emt", SIGEMT
);
6153 parse_signal ("kill", SIGKILL
);
6156 parse_signal ("fpe", SIGFPE
);
6159 parse_signal ("bus", SIGBUS
);
6162 parse_signal ("segv", SIGSEGV
);
6165 parse_signal ("sys", SIGSYS
);
6168 parse_signal ("pipe", SIGPIPE
);
6171 parse_signal ("alrm", SIGALRM
);
6174 parse_signal ("urg", SIGURG
);
6177 parse_signal ("stop", SIGSTOP
);
6180 parse_signal ("tstp", SIGTSTP
);
6183 parse_signal ("cont", SIGCONT
);
6186 parse_signal ("chld", SIGCHLD
);
6189 parse_signal ("ttin", SIGTTIN
);
6192 parse_signal ("ttou", SIGTTOU
);
6195 parse_signal ("io", SIGIO
);
6198 parse_signal ("xcpu", SIGXCPU
);
6201 parse_signal ("xfsz", SIGXFSZ
);
6204 parse_signal ("vtalrm", SIGVTALRM
);
6207 parse_signal ("prof", SIGPROF
);
6210 parse_signal ("winch", SIGWINCH
);
6213 parse_signal ("info", SIGINFO
);
6216 error ("Undefined signal name %s", name
);
6221 return make_number (kill (pid
, XINT (sigcode
)));
6224 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6225 doc
: /* Make PROCESS see end-of-file in its input.
6226 EOF comes after any text already sent to it.
6227 PROCESS may be a process, a buffer, the name of a process or buffer, or
6228 nil, indicating the current buffer's process.
6229 If PROCESS is a network connection, or is a process communicating
6230 through a pipe (as opposed to a pty), then you cannot send any more
6231 text to PROCESS after you call this function.
6232 If PROCESS is a serial process, wait until all output written to the
6233 process has been transmitted to the serial port. */)
6234 (Lisp_Object process
)
6237 struct coding_system
*coding
;
6239 if (DATAGRAM_CONN_P (process
))
6242 proc
= get_process (process
);
6243 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6245 /* Make sure the process is really alive. */
6246 if (XPROCESS (proc
)->raw_status_new
)
6247 update_status (XPROCESS (proc
));
6248 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6249 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6251 if (CODING_REQUIRE_FLUSHING (coding
))
6253 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6254 send_process (proc
, "", 0, Qnil
);
6257 if (XPROCESS (proc
)->pty_flag
)
6258 send_process (proc
, "\004", 1, Qnil
);
6259 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6262 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6263 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6264 #endif /* not WINDOWSNT */
6265 /* Do nothing on Windows because writes are blocking. */
6269 int old_outfd
, new_outfd
;
6271 #ifdef HAVE_SHUTDOWN
6272 /* If this is a network connection, or socketpair is used
6273 for communication with the subprocess, call shutdown to cause EOF.
6274 (In some old system, shutdown to socketpair doesn't work.
6275 Then we just can't win.) */
6276 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6277 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6278 shutdown (XPROCESS (proc
)->outfd
, 1);
6279 /* In case of socketpair, outfd == infd, so don't close it. */
6280 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6281 emacs_close (XPROCESS (proc
)->outfd
);
6282 #else /* not HAVE_SHUTDOWN */
6283 emacs_close (XPROCESS (proc
)->outfd
);
6284 #endif /* not HAVE_SHUTDOWN */
6285 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6288 old_outfd
= XPROCESS (proc
)->outfd
;
6290 if (!proc_encode_coding_system
[new_outfd
])
6291 proc_encode_coding_system
[new_outfd
]
6292 = xmalloc (sizeof (struct coding_system
));
6293 memcpy (proc_encode_coding_system
[new_outfd
],
6294 proc_encode_coding_system
[old_outfd
],
6295 sizeof (struct coding_system
));
6296 memset (proc_encode_coding_system
[old_outfd
], 0,
6297 sizeof (struct coding_system
));
6299 XPROCESS (proc
)->outfd
= new_outfd
;
6304 /* On receipt of a signal that a child status has changed, loop asking
6305 about children with changed statuses until the system says there
6308 All we do is change the status; we do not run sentinels or print
6309 notifications. That is saved for the next time keyboard input is
6310 done, in order to avoid timing errors.
6312 ** WARNING: this can be called during garbage collection.
6313 Therefore, it must not be fooled by the presence of mark bits in
6316 ** USG WARNING: Although it is not obvious from the documentation
6317 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6318 signal() before executing at least one wait(), otherwise the
6319 handler will be called again, resulting in an infinite loop. The
6320 relevant portion of the documentation reads "SIGCLD signals will be
6321 queued and the signal-catching function will be continually
6322 reentered until the queue is empty". Invoking signal() causes the
6323 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6326 ** Malloc WARNING: This should never call malloc either directly or
6327 indirectly; if it does, that is a bug */
6331 sigchld_handler (int signo
)
6333 int old_errno
= errno
;
6335 struct Lisp_Process
*p
;
6337 SIGNAL_THREAD_CHECK (signo
);
6348 #endif /* no WUNTRACED */
6349 /* Keep trying to get a status until we get a definitive result. */
6353 pid
= waitpid (-1, &w
, WNOHANG
| WUNTRACED
);
6355 while (pid
< 0 && errno
== EINTR
);
6359 /* PID == 0 means no processes found, PID == -1 means a real
6360 failure. We have done all our job, so return. */
6367 #endif /* no WNOHANG */
6369 /* Find the process that signaled us, and record its status. */
6371 /* The process can have been deleted by Fdelete_process. */
6372 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6374 Lisp_Object xpid
= XCAR (tail
);
6375 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6376 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6378 XSETCAR (tail
, Qnil
);
6379 goto sigchld_end_of_loop
;
6383 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6385 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6387 proc
= XCDR (XCAR (tail
));
6388 p
= XPROCESS (proc
);
6389 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6394 /* Look for an asynchronous process whose pid hasn't been filled
6397 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6399 proc
= XCDR (XCAR (tail
));
6400 p
= XPROCESS (proc
);
6406 /* Change the status of the process that was found. */
6409 int clear_desc_flag
= 0;
6411 p
->tick
= ++process_tick
;
6413 p
->raw_status_new
= 1;
6415 /* If process has terminated, stop waiting for its output. */
6416 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6418 clear_desc_flag
= 1;
6420 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6421 if (clear_desc_flag
)
6423 FD_CLR (p
->infd
, &input_wait_mask
);
6424 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6427 /* Tell wait_reading_process_output that it needs to wake up and
6429 if (input_available_clear_time
)
6430 *input_available_clear_time
= make_emacs_time (0, 0);
6433 /* There was no asynchronous process found for that pid: we have
6434 a synchronous process. */
6437 synch_process_alive
= 0;
6439 /* Report the status of the synchronous process. */
6441 synch_process_retcode
= WEXITSTATUS (w
);
6442 else if (WIFSIGNALED (w
))
6443 synch_process_termsig
= WTERMSIG (w
);
6445 /* Tell wait_reading_process_output that it needs to wake up and
6447 if (input_available_clear_time
)
6448 *input_available_clear_time
= make_emacs_time (0, 0);
6451 sigchld_end_of_loop
:
6454 /* On some systems, we must return right away.
6455 If any more processes want to signal us, we will
6457 Otherwise (on systems that have WNOHANG), loop around
6458 to use up all the processes that have something to tell us. */
6459 #if (defined WINDOWSNT \
6460 || (defined USG && !defined GNU_LINUX \
6461 && !(defined HPUX && defined WNOHANG)))
6464 #endif /* USG, but not HPUX with WNOHANG */
6467 #endif /* SIGCHLD */
6471 exec_sentinel_unwind (Lisp_Object data
)
6473 PSET (XPROCESS (XCAR (data
)), sentinel
, XCDR (data
));
6478 exec_sentinel_error_handler (Lisp_Object error_val
)
6480 cmd_error_internal (error_val
, "error in process sentinel: ");
6482 update_echo_area ();
6483 Fsleep_for (make_number (2), Qnil
);
6488 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6490 Lisp_Object sentinel
, odeactivate
;
6491 register struct Lisp_Process
*p
= XPROCESS (proc
);
6492 ptrdiff_t count
= SPECPDL_INDEX ();
6493 int outer_running_asynch_code
= running_asynch_code
;
6494 int waiting
= waiting_for_user_input_p
;
6496 if (inhibit_sentinels
)
6499 /* No need to gcpro these, because all we do with them later
6500 is test them for EQness, and none of them should be a string. */
6501 odeactivate
= Vdeactivate_mark
;
6503 Lisp_Object obuffer
, okeymap
;
6504 XSETBUFFER (obuffer
, current_buffer
);
6505 okeymap
= BVAR (current_buffer
, keymap
);
6508 /* There's no good reason to let sentinels change the current
6509 buffer, and many callers of accept-process-output, sit-for, and
6510 friends don't expect current-buffer to be changed from under them. */
6511 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6513 sentinel
= p
->sentinel
;
6514 if (NILP (sentinel
))
6517 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6518 assure that it gets restored no matter how the sentinel exits. */
6519 PSET (p
, sentinel
, Qnil
);
6520 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6521 /* Inhibit quit so that random quits don't screw up a running filter. */
6522 specbind (Qinhibit_quit
, Qt
);
6523 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6525 /* In case we get recursively called,
6526 and we already saved the match data nonrecursively,
6527 save the same match data in safely recursive fashion. */
6528 if (outer_running_asynch_code
)
6531 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6532 restore_search_regs ();
6533 record_unwind_save_match_data ();
6534 Fset_match_data (tem
, Qt
);
6537 /* For speed, if a search happens within this code,
6538 save the match data in a special nonrecursive fashion. */
6539 running_asynch_code
= 1;
6541 internal_condition_case_1 (read_process_output_call
,
6543 Fcons (proc
, Fcons (reason
, Qnil
))),
6544 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6545 exec_sentinel_error_handler
);
6547 /* If we saved the match data nonrecursively, restore it now. */
6548 restore_search_regs ();
6549 running_asynch_code
= outer_running_asynch_code
;
6551 Vdeactivate_mark
= odeactivate
;
6553 /* Restore waiting_for_user_input_p as it was
6554 when we were called, in case the filter clobbered it. */
6555 waiting_for_user_input_p
= waiting
;
6558 if (! EQ (Fcurrent_buffer (), obuffer
)
6559 || ! EQ (current_buffer
->keymap
, okeymap
))
6561 /* But do it only if the caller is actually going to read events.
6562 Otherwise there's no need to make him wake up, and it could
6563 cause trouble (for example it would make sit_for return). */
6564 if (waiting_for_user_input_p
== -1)
6565 record_asynch_buffer_change ();
6567 unbind_to (count
, Qnil
);
6570 /* Report all recent events of a change in process status
6571 (either run the sentinel or output a message).
6572 This is usually done while Emacs is waiting for keyboard input
6573 but can be done at other times. */
6576 status_notify (struct Lisp_Process
*deleting_process
)
6578 register Lisp_Object proc
, buffer
;
6579 Lisp_Object tail
, msg
;
6580 struct gcpro gcpro1
, gcpro2
;
6584 /* We need to gcpro tail; if read_process_output calls a filter
6585 which deletes a process and removes the cons to which tail points
6586 from Vprocess_alist, and then causes a GC, tail is an unprotected
6590 /* Set this now, so that if new processes are created by sentinels
6591 that we run, we get called again to handle their status changes. */
6592 update_tick
= process_tick
;
6594 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6597 register struct Lisp_Process
*p
;
6599 proc
= Fcdr (XCAR (tail
));
6600 p
= XPROCESS (proc
);
6602 if (p
->tick
!= p
->update_tick
)
6604 p
->update_tick
= p
->tick
;
6606 /* If process is still active, read any output that remains. */
6607 while (! EQ (p
->filter
, Qt
)
6608 && ! EQ (p
->status
, Qconnect
)
6609 && ! EQ (p
->status
, Qlisten
)
6610 /* Network or serial process not stopped: */
6611 && ! EQ (p
->command
, Qt
)
6613 && p
!= deleting_process
6614 && read_process_output (proc
, p
->infd
) > 0);
6618 /* Get the text to use for the message. */
6619 if (p
->raw_status_new
)
6621 msg
= status_message (p
);
6623 /* If process is terminated, deactivate it or delete it. */
6625 if (CONSP (p
->status
))
6626 symbol
= XCAR (p
->status
);
6628 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6629 || EQ (symbol
, Qclosed
))
6631 if (delete_exited_processes
)
6632 remove_process (proc
);
6634 deactivate_process (proc
);
6637 /* The actions above may have further incremented p->tick.
6638 So set p->update_tick again
6639 so that an error in the sentinel will not cause
6640 this code to be run again. */
6641 p
->update_tick
= p
->tick
;
6642 /* Now output the message suitably. */
6643 if (!NILP (p
->sentinel
))
6644 exec_sentinel (proc
, msg
);
6645 /* Don't bother with a message in the buffer
6646 when a process becomes runnable. */
6647 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6650 struct buffer
*old
= current_buffer
;
6651 ptrdiff_t opoint
, opoint_byte
;
6652 ptrdiff_t before
, before_byte
;
6654 /* Avoid error if buffer is deleted
6655 (probably that's why the process is dead, too) */
6656 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6658 Fset_buffer (buffer
);
6661 opoint_byte
= PT_BYTE
;
6662 /* Insert new output into buffer
6663 at the current end-of-output marker,
6664 thus preserving logical ordering of input and output. */
6665 if (XMARKER (p
->mark
)->buffer
)
6666 Fgoto_char (p
->mark
);
6668 SET_PT_BOTH (ZV
, ZV_BYTE
);
6671 before_byte
= PT_BYTE
;
6673 tem
= BVAR (current_buffer
, read_only
);
6674 BSET (current_buffer
, read_only
, Qnil
);
6675 insert_string ("\nProcess ");
6676 { /* FIXME: temporary kludge */
6677 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6678 insert_string (" ");
6680 BSET (current_buffer
, read_only
, tem
);
6681 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6683 if (opoint
>= before
)
6684 SET_PT_BOTH (opoint
+ (PT
- before
),
6685 opoint_byte
+ (PT_BYTE
- before_byte
));
6687 SET_PT_BOTH (opoint
, opoint_byte
);
6689 set_buffer_internal (old
);
6694 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6699 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6700 Sset_process_coding_system
, 1, 3, 0,
6701 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6702 DECODING will be used to decode subprocess output and ENCODING to
6703 encode subprocess input. */)
6704 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6706 register struct Lisp_Process
*p
;
6708 CHECK_PROCESS (process
);
6709 p
= XPROCESS (process
);
6711 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6713 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6714 Fcheck_coding_system (decoding
);
6715 Fcheck_coding_system (encoding
);
6716 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6717 PSET (p
, decode_coding_system
, decoding
);
6718 PSET (p
, encode_coding_system
, encoding
);
6719 setup_process_coding_systems (process
);
6724 DEFUN ("process-coding-system",
6725 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6726 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6727 (register Lisp_Object process
)
6729 CHECK_PROCESS (process
);
6730 return Fcons (XPROCESS (process
)->decode_coding_system
,
6731 XPROCESS (process
)->encode_coding_system
);
6734 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6735 Sset_process_filter_multibyte
, 2, 2, 0,
6736 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6737 If FLAG is non-nil, the filter is given multibyte strings.
6738 If FLAG is nil, the filter is given unibyte strings. In this case,
6739 all character code conversion except for end-of-line conversion is
6741 (Lisp_Object process
, Lisp_Object flag
)
6743 register struct Lisp_Process
*p
;
6745 CHECK_PROCESS (process
);
6746 p
= XPROCESS (process
);
6748 PSET (p
, decode_coding_system
,
6749 raw_text_coding_system (p
->decode_coding_system
));
6750 setup_process_coding_systems (process
);
6755 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6756 Sprocess_filter_multibyte_p
, 1, 1, 0,
6757 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6758 (Lisp_Object process
)
6760 register struct Lisp_Process
*p
;
6761 struct coding_system
*coding
;
6763 CHECK_PROCESS (process
);
6764 p
= XPROCESS (process
);
6765 coding
= proc_decode_coding_system
[p
->infd
];
6766 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6775 add_gpm_wait_descriptor (int desc
)
6777 add_keyboard_wait_descriptor (desc
);
6781 delete_gpm_wait_descriptor (int desc
)
6783 delete_keyboard_wait_descriptor (desc
);
6790 /* Return nonzero if *MASK has a bit set
6791 that corresponds to one of the keyboard input descriptors. */
6794 keyboard_bit_set (fd_set
*mask
)
6798 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6799 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6800 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6807 #else /* not subprocesses */
6809 /* Defined on msdos.c. */
6810 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6811 EMACS_TIME
*, void *);
6813 /* Implementation of wait_reading_process_output, assuming that there
6814 are no subprocesses. Used only by the MS-DOS build.
6816 Wait for timeout to elapse and/or keyboard input to be available.
6820 If negative, gobble data immediately available but don't wait for any.
6823 an additional duration to wait, measured in nanoseconds
6824 If TIME_LIMIT is zero, then:
6825 If NSECS == 0, there is no limit.
6826 If NSECS > 0, the timeout consists of NSECS only.
6827 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6830 0 to ignore keyboard input, or
6831 1 to return when input is available, or
6832 -1 means caller will actually read the input, so don't throw to
6835 see full version for other parameters. We know that wait_proc will
6836 always be NULL, since `subprocesses' isn't defined.
6838 DO_DISPLAY != 0 means redisplay should be done to show subprocess
6839 output that arrives.
6841 Return true if we received input from any process. */
6844 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6846 Lisp_Object wait_for_cell
,
6847 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6850 EMACS_TIME end_time
, timeout
;
6857 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6858 time_limit
= TYPE_MAXIMUM (time_t);
6860 /* What does time_limit really mean? */
6861 if (time_limit
|| 0 < nsecs
)
6863 timeout
= make_emacs_time (time_limit
, nsecs
);
6864 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6867 /* Turn off periodic alarms (in case they are in use)
6868 and then turn off any other atimers,
6869 because the select emulator uses alarms. */
6871 turn_on_atimers (0);
6875 int timeout_reduced_for_timers
= 0;
6876 SELECT_TYPE waitchannels
;
6879 /* If calling from keyboard input, do not quit
6880 since we want to return C-g as an input character.
6881 Otherwise, do pending quit if requested. */
6885 /* Exit now if the cell we're waiting for became non-nil. */
6886 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6889 /* Compute time from now till when time limit is up */
6890 /* Exit if already run out */
6893 /* A negative timeout means
6894 gobble output available now
6895 but don't wait at all. */
6897 timeout
= make_emacs_time (0, 0);
6899 else if (time_limit
|| 0 < nsecs
)
6901 EMACS_TIME now
= current_emacs_time ();
6902 if (EMACS_TIME_LE (end_time
, now
))
6904 timeout
= sub_emacs_time (end_time
, now
);
6908 timeout
= make_emacs_time (100000, 0);
6911 /* If our caller will not immediately handle keyboard events,
6912 run timer events directly.
6913 (Callers that will immediately read keyboard events
6914 call timer_delay on their own.) */
6915 if (NILP (wait_for_cell
))
6917 EMACS_TIME timer_delay
;
6921 int old_timers_run
= timers_run
;
6922 timer_delay
= timer_check ();
6923 if (timers_run
!= old_timers_run
&& do_display
)
6924 /* We must retry, since a timer may have requeued itself
6925 and that could alter the time delay. */
6926 redisplay_preserve_echo_area (14);
6930 while (!detect_input_pending ());
6932 /* If there is unread keyboard input, also return. */
6934 && requeued_events_pending_p ())
6937 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6939 if (EMACS_TIME_LT (timer_delay
, timeout
))
6941 timeout
= timer_delay
;
6942 timeout_reduced_for_timers
= 1;
6947 /* Cause C-g and alarm signals to take immediate action,
6948 and cause input available signals to zero out timeout. */
6950 set_waiting_for_input (&timeout
);
6952 /* If a frame has been newly mapped and needs updating,
6953 reprocess its display stuff. */
6954 if (frame_garbaged
&& do_display
)
6956 clear_waiting_for_input ();
6957 redisplay_preserve_echo_area (15);
6959 set_waiting_for_input (&timeout
);
6962 /* Wait till there is something to do. */
6963 FD_ZERO (&waitchannels
);
6964 if (read_kbd
&& detect_input_pending ())
6968 if (read_kbd
|| !NILP (wait_for_cell
))
6969 FD_SET (0, &waitchannels
);
6970 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6975 /* Make C-g and alarm signals set flags again */
6976 clear_waiting_for_input ();
6978 /* If we woke up due to SIGWINCH, actually change size now. */
6979 do_pending_window_change (0);
6981 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6982 /* We waited the full specified time, so return now. */
6987 /* If the system call was interrupted, then go around the
6989 if (xerrno
== EINTR
)
6990 FD_ZERO (&waitchannels
);
6992 error ("select error: %s", emacs_strerror (xerrno
));
6995 /* Check for keyboard input */
6998 && detect_input_pending_run_timers (do_display
))
7000 swallow_events (do_display
);
7001 if (detect_input_pending_run_timers (do_display
))
7005 /* If there is unread keyboard input, also return. */
7007 && requeued_events_pending_p ())
7010 /* If wait_for_cell. check for keyboard input
7011 but don't run any timers.
7012 ??? (It seems wrong to me to check for keyboard
7013 input at all when wait_for_cell, but the code
7014 has been this way since July 1994.
7015 Try changing this after version 19.31.) */
7016 if (! NILP (wait_for_cell
)
7017 && detect_input_pending ())
7019 swallow_events (do_display
);
7020 if (detect_input_pending ())
7024 /* Exit now if the cell we're waiting for became non-nil. */
7025 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7034 #endif /* not subprocesses */
7036 /* The following functions are needed even if async subprocesses are
7037 not supported. Some of them are no-op stubs in that case. */
7039 /* Add DESC to the set of keyboard input descriptors. */
7042 add_keyboard_wait_descriptor (int desc
)
7044 #ifdef subprocesses /* actually means "not MSDOS" */
7045 FD_SET (desc
, &input_wait_mask
);
7046 FD_SET (desc
, &non_process_wait_mask
);
7047 if (desc
> max_input_desc
)
7048 max_input_desc
= desc
;
7052 /* From now on, do not expect DESC to give keyboard input. */
7055 delete_keyboard_wait_descriptor (int desc
)
7059 int lim
= max_input_desc
;
7061 FD_CLR (desc
, &input_wait_mask
);
7062 FD_CLR (desc
, &non_process_wait_mask
);
7064 if (desc
== max_input_desc
)
7065 for (fd
= 0; fd
< lim
; fd
++)
7066 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7067 max_input_desc
= fd
;
7071 /* Setup coding systems of PROCESS. */
7074 setup_process_coding_systems (Lisp_Object process
)
7077 struct Lisp_Process
*p
= XPROCESS (process
);
7079 int outch
= p
->outfd
;
7080 Lisp_Object coding_system
;
7082 if (inch
< 0 || outch
< 0)
7085 if (!proc_decode_coding_system
[inch
])
7086 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7087 coding_system
= p
->decode_coding_system
;
7088 if (! NILP (p
->filter
))
7090 else if (BUFFERP (p
->buffer
))
7092 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7093 coding_system
= raw_text_coding_system (coding_system
);
7095 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7097 if (!proc_encode_coding_system
[outch
])
7098 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7099 setup_coding_system (p
->encode_coding_system
,
7100 proc_encode_coding_system
[outch
]);
7104 /* Close all descriptors currently in use for communication
7105 with subprocess. This is used in a newly-forked subprocess
7106 to get rid of irrelevant descriptors. */
7109 close_process_descs (void)
7113 for (i
= 0; i
< MAXDESC
; i
++)
7115 Lisp_Object process
;
7116 process
= chan_process
[i
];
7117 if (!NILP (process
))
7119 int in
= XPROCESS (process
)->infd
;
7120 int out
= XPROCESS (process
)->outfd
;
7123 if (out
>= 0 && in
!= out
)
7130 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7131 doc
: /* Return the (or a) process associated with BUFFER.
7132 BUFFER may be a buffer or the name of one. */)
7133 (register Lisp_Object buffer
)
7136 register Lisp_Object buf
, tail
, proc
;
7138 if (NILP (buffer
)) return Qnil
;
7139 buf
= Fget_buffer (buffer
);
7140 if (NILP (buf
)) return Qnil
;
7142 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7144 proc
= Fcdr (XCAR (tail
));
7145 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7148 #endif /* subprocesses */
7152 DEFUN ("process-inherit-coding-system-flag",
7153 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7155 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7156 If this flag is t, `buffer-file-coding-system' of the buffer
7157 associated with PROCESS will inherit the coding system used to decode
7158 the process output. */)
7159 (register Lisp_Object process
)
7162 CHECK_PROCESS (process
);
7163 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7165 /* Ignore the argument and return the value of
7166 inherit-process-coding-system. */
7167 return inherit_process_coding_system
? Qt
: Qnil
;
7171 /* Kill all processes associated with `buffer'.
7172 If `buffer' is nil, kill all processes */
7175 kill_buffer_processes (Lisp_Object buffer
)
7178 Lisp_Object tail
, proc
;
7180 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7182 proc
= XCDR (XCAR (tail
));
7184 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7186 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7187 Fdelete_process (proc
);
7188 else if (XPROCESS (proc
)->infd
>= 0)
7189 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7192 #else /* subprocesses */
7193 /* Since we have no subprocesses, this does nothing. */
7194 #endif /* subprocesses */
7197 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7198 Swaiting_for_user_input_p
, 0, 0, 0,
7199 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7200 This is intended for use by asynchronous process output filters and sentinels. */)
7204 return (waiting_for_user_input_p
? Qt
: Qnil
);
7210 /* Stop reading input from keyboard sources. */
7213 hold_keyboard_input (void)
7218 /* Resume reading input from keyboard sources. */
7221 unhold_keyboard_input (void)
7226 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7229 kbd_on_hold_p (void)
7231 return kbd_is_on_hold
;
7235 /* Enumeration of and access to system processes a-la ps(1). */
7237 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7239 doc
: /* Return a list of numerical process IDs of all running processes.
7240 If this functionality is unsupported, return nil.
7242 See `process-attributes' for getting attributes of a process given its ID. */)
7245 return list_system_processes ();
7248 DEFUN ("process-attributes", Fprocess_attributes
,
7249 Sprocess_attributes
, 1, 1, 0,
7250 doc
: /* Return attributes of the process given by its PID, a number.
7252 Value is an alist where each element is a cons cell of the form
7256 If this functionality is unsupported, the value is nil.
7258 See `list-system-processes' for getting a list of all process IDs.
7260 The KEYs of the attributes that this function may return are listed
7261 below, together with the type of the associated VALUE (in parentheses).
7262 Not all platforms support all of these attributes; unsupported
7263 attributes will not appear in the returned alist.
7264 Unless explicitly indicated otherwise, numbers can have either
7265 integer or floating point values.
7267 euid -- Effective user User ID of the process (number)
7268 user -- User name corresponding to euid (string)
7269 egid -- Effective user Group ID of the process (number)
7270 group -- Group name corresponding to egid (string)
7271 comm -- Command name (executable name only) (string)
7272 state -- Process state code, such as "S", "R", or "T" (string)
7273 ppid -- Parent process ID (number)
7274 pgrp -- Process group ID (number)
7275 sess -- Session ID, i.e. process ID of session leader (number)
7276 ttname -- Controlling tty name (string)
7277 tpgid -- ID of foreground process group on the process's tty (number)
7278 minflt -- number of minor page faults (number)
7279 majflt -- number of major page faults (number)
7280 cminflt -- cumulative number of minor page faults (number)
7281 cmajflt -- cumulative number of major page faults (number)
7282 utime -- user time used by the process, in (current-time) format,
7283 which is a list of integers (HIGH LOW USEC PSEC)
7284 stime -- system time used by the process (current-time)
7285 time -- sum of utime and stime (current-time)
7286 cutime -- user time used by the process and its children (current-time)
7287 cstime -- system time used by the process and its children (current-time)
7288 ctime -- sum of cutime and cstime (current-time)
7289 pri -- priority of the process (number)
7290 nice -- nice value of the process (number)
7291 thcount -- process thread count (number)
7292 start -- time the process started (current-time)
7293 vsize -- virtual memory size of the process in KB's (number)
7294 rss -- resident set size of the process in KB's (number)
7295 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7296 pcpu -- percents of CPU time used by the process (floating-point number)
7297 pmem -- percents of total physical memory used by process's resident set
7298 (floating-point number)
7299 args -- command line which invoked the process (string). */)
7302 return system_process_attributes (pid
);
7306 /* This is not called "init_process" because that is the name of a
7307 Mach system call, so it would cause problems on Darwin systems. */
7309 init_process_emacs (void)
7314 inhibit_sentinels
= 0;
7318 if (! noninteractive
|| initialized
)
7320 signal (SIGCHLD
, sigchld_handler
);
7323 FD_ZERO (&input_wait_mask
);
7324 FD_ZERO (&non_keyboard_wait_mask
);
7325 FD_ZERO (&non_process_wait_mask
);
7326 FD_ZERO (&write_mask
);
7327 max_process_desc
= 0;
7328 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7330 #ifdef NON_BLOCKING_CONNECT
7331 FD_ZERO (&connect_wait_mask
);
7332 num_pending_connects
= 0;
7335 #ifdef ADAPTIVE_READ_BUFFERING
7336 process_output_delay_count
= 0;
7337 process_output_skip
= 0;
7340 /* Don't do this, it caused infinite select loops. The display
7341 method should call add_keyboard_wait_descriptor on stdin if it
7344 FD_SET (0, &input_wait_mask
);
7347 Vprocess_alist
= Qnil
;
7349 deleted_pid_list
= Qnil
;
7351 for (i
= 0; i
< MAXDESC
; i
++)
7353 chan_process
[i
] = Qnil
;
7354 proc_buffered_char
[i
] = -1;
7356 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7357 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7358 #ifdef DATAGRAM_SOCKETS
7359 memset (datagram_address
, 0, sizeof datagram_address
);
7363 Lisp_Object subfeatures
= Qnil
;
7364 const struct socket_options
*sopt
;
7366 #define ADD_SUBFEATURE(key, val) \
7367 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7369 #ifdef NON_BLOCKING_CONNECT
7370 ADD_SUBFEATURE (QCnowait
, Qt
);
7372 #ifdef DATAGRAM_SOCKETS
7373 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7375 #ifdef HAVE_SEQPACKET
7376 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7378 #ifdef HAVE_LOCAL_SOCKETS
7379 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7381 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7383 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7385 #ifdef HAVE_GETSOCKNAME
7386 ADD_SUBFEATURE (QCservice
, Qt
);
7388 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7389 ADD_SUBFEATURE (QCserver
, Qt
);
7392 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7393 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7395 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7398 #if defined (DARWIN_OS)
7399 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7400 processes. As such, we only change the default value. */
7403 char const *release
= (STRINGP (Voperating_system_release
)
7404 ? SSDATA (Voperating_system_release
)
7406 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7407 Vprocess_connection_type
= Qnil
;
7411 #endif /* subprocesses */
7416 syms_of_process (void)
7420 DEFSYM (Qprocessp
, "processp");
7421 DEFSYM (Qrun
, "run");
7422 DEFSYM (Qstop
, "stop");
7423 DEFSYM (Qsignal
, "signal");
7425 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7428 Qexit = intern_c_string ("exit");
7429 staticpro (&Qexit); */
7431 DEFSYM (Qopen
, "open");
7432 DEFSYM (Qclosed
, "closed");
7433 DEFSYM (Qconnect
, "connect");
7434 DEFSYM (Qfailed
, "failed");
7435 DEFSYM (Qlisten
, "listen");
7436 DEFSYM (Qlocal
, "local");
7437 DEFSYM (Qipv4
, "ipv4");
7439 DEFSYM (Qipv6
, "ipv6");
7441 DEFSYM (Qdatagram
, "datagram");
7442 DEFSYM (Qseqpacket
, "seqpacket");
7444 DEFSYM (QCport
, ":port");
7445 DEFSYM (QCspeed
, ":speed");
7446 DEFSYM (QCprocess
, ":process");
7448 DEFSYM (QCbytesize
, ":bytesize");
7449 DEFSYM (QCstopbits
, ":stopbits");
7450 DEFSYM (QCparity
, ":parity");
7451 DEFSYM (Qodd
, "odd");
7452 DEFSYM (Qeven
, "even");
7453 DEFSYM (QCflowcontrol
, ":flowcontrol");
7456 DEFSYM (QCsummary
, ":summary");
7458 DEFSYM (Qreal
, "real");
7459 DEFSYM (Qnetwork
, "network");
7460 DEFSYM (Qserial
, "serial");
7461 DEFSYM (QCbuffer
, ":buffer");
7462 DEFSYM (QChost
, ":host");
7463 DEFSYM (QCservice
, ":service");
7464 DEFSYM (QClocal
, ":local");
7465 DEFSYM (QCremote
, ":remote");
7466 DEFSYM (QCcoding
, ":coding");
7467 DEFSYM (QCserver
, ":server");
7468 DEFSYM (QCnowait
, ":nowait");
7469 DEFSYM (QCsentinel
, ":sentinel");
7470 DEFSYM (QClog
, ":log");
7471 DEFSYM (QCnoquery
, ":noquery");
7472 DEFSYM (QCstop
, ":stop");
7473 DEFSYM (QCoptions
, ":options");
7474 DEFSYM (QCplist
, ":plist");
7476 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7478 staticpro (&Vprocess_alist
);
7480 staticpro (&deleted_pid_list
);
7483 #endif /* subprocesses */
7485 DEFSYM (QCname
, ":name");
7486 DEFSYM (QCtype
, ":type");
7488 DEFSYM (Qeuid
, "euid");
7489 DEFSYM (Qegid
, "egid");
7490 DEFSYM (Quser
, "user");
7491 DEFSYM (Qgroup
, "group");
7492 DEFSYM (Qcomm
, "comm");
7493 DEFSYM (Qstate
, "state");
7494 DEFSYM (Qppid
, "ppid");
7495 DEFSYM (Qpgrp
, "pgrp");
7496 DEFSYM (Qsess
, "sess");
7497 DEFSYM (Qttname
, "ttname");
7498 DEFSYM (Qtpgid
, "tpgid");
7499 DEFSYM (Qminflt
, "minflt");
7500 DEFSYM (Qmajflt
, "majflt");
7501 DEFSYM (Qcminflt
, "cminflt");
7502 DEFSYM (Qcmajflt
, "cmajflt");
7503 DEFSYM (Qutime
, "utime");
7504 DEFSYM (Qstime
, "stime");
7505 DEFSYM (Qtime
, "time");
7506 DEFSYM (Qcutime
, "cutime");
7507 DEFSYM (Qcstime
, "cstime");
7508 DEFSYM (Qctime
, "ctime");
7509 DEFSYM (Qpri
, "pri");
7510 DEFSYM (Qnice
, "nice");
7511 DEFSYM (Qthcount
, "thcount");
7512 DEFSYM (Qstart
, "start");
7513 DEFSYM (Qvsize
, "vsize");
7514 DEFSYM (Qrss
, "rss");
7515 DEFSYM (Qetime
, "etime");
7516 DEFSYM (Qpcpu
, "pcpu");
7517 DEFSYM (Qpmem
, "pmem");
7518 DEFSYM (Qargs
, "args");
7520 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7521 doc
: /* Non-nil means delete processes immediately when they exit.
7522 A value of nil means don't delete them until `list-processes' is run. */);
7524 delete_exited_processes
= 1;
7527 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7528 doc
: /* Control type of device used to communicate with subprocesses.
7529 Values are nil to use a pipe, or t or `pty' to use a pty.
7530 The value has no effect if the system has no ptys or if all ptys are busy:
7531 then a pipe is used in any case.
7532 The value takes effect when `start-process' is called. */);
7533 Vprocess_connection_type
= Qt
;
7535 #ifdef ADAPTIVE_READ_BUFFERING
7536 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7537 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7538 On some systems, when Emacs reads the output from a subprocess, the output data
7539 is read in very small blocks, potentially resulting in very poor performance.
7540 This behavior can be remedied to some extent by setting this variable to a
7541 non-nil value, as it will automatically delay reading from such processes, to
7542 allow them to produce more output before Emacs tries to read it.
7543 If the value is t, the delay is reset after each write to the process; any other
7544 non-nil value means that the delay is not reset on write.
7545 The variable takes effect when `start-process' is called. */);
7546 Vprocess_adaptive_read_buffering
= Qt
;
7549 defsubr (&Sprocessp
);
7550 defsubr (&Sget_process
);
7551 defsubr (&Sdelete_process
);
7552 defsubr (&Sprocess_status
);
7553 defsubr (&Sprocess_exit_status
);
7554 defsubr (&Sprocess_id
);
7555 defsubr (&Sprocess_name
);
7556 defsubr (&Sprocess_tty_name
);
7557 defsubr (&Sprocess_command
);
7558 defsubr (&Sset_process_buffer
);
7559 defsubr (&Sprocess_buffer
);
7560 defsubr (&Sprocess_mark
);
7561 defsubr (&Sset_process_filter
);
7562 defsubr (&Sprocess_filter
);
7563 defsubr (&Sset_process_sentinel
);
7564 defsubr (&Sprocess_sentinel
);
7565 defsubr (&Sset_process_window_size
);
7566 defsubr (&Sset_process_inherit_coding_system_flag
);
7567 defsubr (&Sset_process_query_on_exit_flag
);
7568 defsubr (&Sprocess_query_on_exit_flag
);
7569 defsubr (&Sprocess_contact
);
7570 defsubr (&Sprocess_plist
);
7571 defsubr (&Sset_process_plist
);
7572 defsubr (&Sprocess_list
);
7573 defsubr (&Sstart_process
);
7574 defsubr (&Sserial_process_configure
);
7575 defsubr (&Smake_serial_process
);
7576 defsubr (&Sset_network_process_option
);
7577 defsubr (&Smake_network_process
);
7578 defsubr (&Sformat_network_address
);
7579 #if defined (HAVE_NET_IF_H)
7581 defsubr (&Snetwork_interface_list
);
7583 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7584 defsubr (&Snetwork_interface_info
);
7586 #endif /* defined (HAVE_NET_IF_H) */
7587 #ifdef DATAGRAM_SOCKETS
7588 defsubr (&Sprocess_datagram_address
);
7589 defsubr (&Sset_process_datagram_address
);
7591 defsubr (&Saccept_process_output
);
7592 defsubr (&Sprocess_send_region
);
7593 defsubr (&Sprocess_send_string
);
7594 defsubr (&Sinterrupt_process
);
7595 defsubr (&Skill_process
);
7596 defsubr (&Squit_process
);
7597 defsubr (&Sstop_process
);
7598 defsubr (&Scontinue_process
);
7599 defsubr (&Sprocess_running_child_p
);
7600 defsubr (&Sprocess_send_eof
);
7601 defsubr (&Ssignal_process
);
7602 defsubr (&Swaiting_for_user_input_p
);
7603 defsubr (&Sprocess_type
);
7604 defsubr (&Sset_process_coding_system
);
7605 defsubr (&Sprocess_coding_system
);
7606 defsubr (&Sset_process_filter_multibyte
);
7607 defsubr (&Sprocess_filter_multibyte_p
);
7609 #endif /* subprocesses */
7611 defsubr (&Sget_buffer_process
);
7612 defsubr (&Sprocess_inherit_coding_system_flag
);
7613 defsubr (&Slist_system_processes
);
7614 defsubr (&Sprocess_attributes
);