1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2011
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
37 /* Only MS-DOS does not define `subprocesses'. */
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
45 /* Are local (unix) sockets supported? */
46 #if defined (HAVE_SYS_UN_H)
47 #if !defined (AF_LOCAL) && defined (AF_UNIX)
48 #define AF_LOCAL AF_UNIX
51 #define HAVE_LOCAL_SOCKETS
56 #include <sys/ioctl.h>
57 #if defined(HAVE_NET_IF_H)
59 #endif /* HAVE_NET_IF_H */
61 #if defined(HAVE_IFADDRS_H)
62 /* Must be after net/if.h */
65 /* We only use structs from this header when we use getifaddrs. */
66 #if defined(HAVE_NET_IF_DL_H)
67 #include <net/if_dl.h>
77 #include <netinet/in.h>
78 #include <arpa/nameser.h>
90 #endif /* subprocesses */
97 #include "character.h"
101 #include "termhooks.h"
102 #include "termopts.h"
103 #include "commands.h"
104 #include "keyboard.h"
105 #include "blockinput.h"
106 #include "dispextern.h"
107 #include "composite.h"
109 #include "sysselect.h"
110 #include "syssignal.h"
116 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
117 #include "xgselect.h"
123 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
124 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
125 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
126 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
127 Lisp_Object QCname
, QCtype
;
129 /* Non-zero if keyboard input is on hold, zero otherwise. */
131 static int kbd_is_on_hold
;
133 /* Nonzero means don't run process sentinels. This is used
135 int inhibit_sentinels
;
139 Lisp_Object Qprocessp
;
140 static Lisp_Object Qrun
, Qstop
, Qsignal
;
141 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
143 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
144 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
146 static Lisp_Object Qipv6
;
148 static Lisp_Object QCport
, QCprocess
;
150 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
151 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
152 static Lisp_Object QCbuffer
, QChost
, QCservice
;
153 static Lisp_Object QClocal
, QCremote
, QCcoding
;
154 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
155 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
156 static Lisp_Object Qlast_nonmenu_event
;
157 /* QCfamily is declared and initialized in xfaces.c,
158 QCfilter in keyboard.c. */
159 extern Lisp_Object QCfamily
, QCfilter
;
161 /* Qexit is declared and initialized in eval.c. */
163 /* QCfamily is defined in xfaces.c. */
164 extern Lisp_Object QCfamily
;
165 /* QCfilter is defined in keyboard.c. */
166 extern Lisp_Object QCfilter
;
168 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
169 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
170 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
171 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
177 /* Number of events of change of status of a process. */
178 static int process_tick
;
179 /* Number of events for which the user or sentinel has been notified. */
180 static int update_tick
;
182 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
184 /* Only W32 has this, it really means that select can't take write mask. */
185 #ifdef BROKEN_NON_BLOCKING_CONNECT
186 #undef NON_BLOCKING_CONNECT
187 #define SELECT_CANT_DO_WRITE_MASK
189 #ifndef NON_BLOCKING_CONNECT
191 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
192 #if defined (O_NONBLOCK) || defined (O_NDELAY)
193 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
194 #define NON_BLOCKING_CONNECT
195 #endif /* EWOULDBLOCK || EINPROGRESS */
196 #endif /* O_NONBLOCK || O_NDELAY */
197 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
198 #endif /* HAVE_SELECT */
199 #endif /* NON_BLOCKING_CONNECT */
200 #endif /* BROKEN_NON_BLOCKING_CONNECT */
202 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
203 this system. We need to read full packets, so we need a
204 "non-destructive" select. So we require either native select,
205 or emulation of select using FIONREAD. */
207 #ifdef BROKEN_DATAGRAM_SOCKETS
208 #undef DATAGRAM_SOCKETS
210 #ifndef DATAGRAM_SOCKETS
211 #if defined (HAVE_SELECT) || defined (FIONREAD)
212 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
213 #define DATAGRAM_SOCKETS
214 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
215 #endif /* HAVE_SELECT || FIONREAD */
216 #endif /* DATAGRAM_SOCKETS */
217 #endif /* BROKEN_DATAGRAM_SOCKETS */
219 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
220 # define HAVE_SEQPACKET
223 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
224 #ifdef EMACS_HAS_USECS
225 #define ADAPTIVE_READ_BUFFERING
229 #ifdef ADAPTIVE_READ_BUFFERING
230 #define READ_OUTPUT_DELAY_INCREMENT 10000
231 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
232 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
234 /* Number of processes which have a non-zero read_output_delay,
235 and therefore might be delayed for adaptive read buffering. */
237 static int process_output_delay_count
;
239 /* Non-zero if any process has non-nil read_output_skip. */
241 static int process_output_skip
;
244 #define process_output_delay_count 0
247 static Lisp_Object
Fget_process (Lisp_Object
);
248 static void create_process (Lisp_Object
, char **, Lisp_Object
);
250 static int keyboard_bit_set (SELECT_TYPE
*);
252 static void deactivate_process (Lisp_Object
);
253 static void status_notify (struct Lisp_Process
*);
254 static int read_process_output (Lisp_Object
, int);
255 static void create_pty (Lisp_Object
);
257 /* If we support a window system, turn on the code to poll periodically
258 to detect C-g. It isn't actually used when doing interrupt input. */
259 #if defined(HAVE_WINDOW_SYSTEM) && !defined(USE_ASYNC_EVENTS)
260 #define POLL_FOR_INPUT
263 static Lisp_Object
get_process (register Lisp_Object name
);
264 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
266 /* Mask of bits indicating the descriptors that we wait for input on. */
268 static SELECT_TYPE input_wait_mask
;
270 /* Mask that excludes keyboard input descriptor(s). */
272 static SELECT_TYPE non_keyboard_wait_mask
;
274 /* Mask that excludes process input descriptor(s). */
276 static SELECT_TYPE non_process_wait_mask
;
278 /* Mask for selecting for write. */
280 static SELECT_TYPE write_mask
;
282 #ifdef NON_BLOCKING_CONNECT
283 /* Mask of bits indicating the descriptors that we wait for connect to
284 complete on. Once they complete, they are removed from this mask
285 and added to the input_wait_mask and non_keyboard_wait_mask. */
287 static SELECT_TYPE connect_wait_mask
;
289 /* Number of bits set in connect_wait_mask. */
290 static int num_pending_connects
;
291 #endif /* NON_BLOCKING_CONNECT */
293 /* The largest descriptor currently in use for a process object. */
294 static int max_process_desc
;
296 /* The largest descriptor currently in use for input. */
297 static int max_input_desc
;
299 /* Indexed by descriptor, gives the process (if any) for that descriptor */
300 static Lisp_Object chan_process
[MAXDESC
];
302 /* Alist of elements (NAME . PROCESS) */
303 static Lisp_Object Vprocess_alist
;
305 /* Buffered-ahead input char from process, indexed by channel.
306 -1 means empty (no char is buffered).
307 Used on sys V where the only way to tell if there is any
308 output from the process is to read at least one char.
309 Always -1 on systems that support FIONREAD. */
311 static int proc_buffered_char
[MAXDESC
];
313 /* Table of `struct coding-system' for each process. */
314 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
315 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
317 #ifdef DATAGRAM_SOCKETS
318 /* Table of `partner address' for datagram sockets. */
319 static struct sockaddr_and_len
{
322 } datagram_address
[MAXDESC
];
323 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
324 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
326 #define DATAGRAM_CHAN_P(chan) (0)
327 #define DATAGRAM_CONN_P(proc) (0)
330 /* Maximum number of bytes to send to a pty without an eof. */
331 static int pty_max_bytes
;
335 static struct fd_callback_data
341 int condition
; /* mask of the defines above. */
342 } fd_callback_info
[MAXDESC
];
345 /* Add a file descriptor FD to be monitored for when read is possible.
346 When read is possible, call FUNC with argument DATA. */
349 add_read_fd (int fd
, fd_callback func
, void *data
)
351 xassert (fd
< MAXDESC
);
352 add_keyboard_wait_descriptor (fd
);
354 fd_callback_info
[fd
].func
= func
;
355 fd_callback_info
[fd
].data
= data
;
356 fd_callback_info
[fd
].condition
|= FOR_READ
;
359 /* Stop monitoring file descriptor FD for when read is possible. */
362 delete_read_fd (int fd
)
364 xassert (fd
< MAXDESC
);
365 delete_keyboard_wait_descriptor (fd
);
367 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
368 if (fd_callback_info
[fd
].condition
== 0)
370 fd_callback_info
[fd
].func
= 0;
371 fd_callback_info
[fd
].data
= 0;
375 /* Add a file descriptor FD to be monitored for when write is possible.
376 When write is possible, call FUNC with argument DATA. */
379 add_write_fd (int fd
, fd_callback func
, void *data
)
381 xassert (fd
< MAXDESC
);
382 FD_SET (fd
, &write_mask
);
383 if (fd
> max_input_desc
)
386 fd_callback_info
[fd
].func
= func
;
387 fd_callback_info
[fd
].data
= data
;
388 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
391 /* Stop monitoring file descriptor FD for when write is possible. */
394 delete_write_fd (int fd
)
396 int lim
= max_input_desc
;
398 xassert (fd
< MAXDESC
);
399 FD_CLR (fd
, &write_mask
);
400 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
401 if (fd_callback_info
[fd
].condition
== 0)
403 fd_callback_info
[fd
].func
= 0;
404 fd_callback_info
[fd
].data
= 0;
406 if (fd
== max_input_desc
)
407 for (fd
= lim
; fd
>= 0; fd
--)
408 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
418 /* Compute the Lisp form of the process status, p->status, from
419 the numeric status that was returned by `wait'. */
421 static Lisp_Object
status_convert (int);
424 update_status (struct Lisp_Process
*p
)
426 eassert (p
->raw_status_new
);
427 p
->status
= status_convert (p
->raw_status
);
428 p
->raw_status_new
= 0;
431 /* Convert a process status word in Unix format to
432 the list that we use internally. */
435 status_convert (int w
)
438 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
439 else if (WIFEXITED (w
))
440 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
441 WCOREDUMP (w
) ? Qt
: Qnil
));
442 else if (WIFSIGNALED (w
))
443 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
444 WCOREDUMP (w
) ? Qt
: Qnil
));
449 /* Given a status-list, extract the three pieces of information
450 and store them individually through the three pointers. */
453 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
467 *code
= XFASTINT (XCAR (tem
));
469 *coredump
= !NILP (tem
);
473 /* Return a string describing a process status list. */
476 status_message (struct Lisp_Process
*p
)
478 Lisp_Object status
= p
->status
;
481 Lisp_Object string
, string2
;
483 decode_status (status
, &symbol
, &code
, &coredump
);
485 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
488 synchronize_system_messages_locale ();
489 signame
= strsignal (code
);
491 string
= build_string ("unknown");
496 string
= make_unibyte_string (signame
, strlen (signame
));
497 if (! NILP (Vlocale_coding_system
))
498 string
= (code_convert_string_norecord
499 (string
, Vlocale_coding_system
, 0));
500 c1
= STRING_CHAR (SDATA (string
));
503 Faset (string
, make_number (0), make_number (c2
));
505 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
506 return concat2 (string
, string2
);
508 else if (EQ (symbol
, Qexit
))
511 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
513 return build_string ("finished\n");
514 string
= Fnumber_to_string (make_number (code
));
515 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
516 return concat3 (build_string ("exited abnormally with code "),
519 else if (EQ (symbol
, Qfailed
))
521 string
= Fnumber_to_string (make_number (code
));
522 string2
= build_string ("\n");
523 return concat3 (build_string ("failed with code "),
527 return Fcopy_sequence (Fsymbol_name (symbol
));
532 /* The file name of the pty opened by allocate_pty. */
533 static char pty_name
[24];
535 /* Open an available pty, returning a file descriptor.
536 Return -1 on failure.
537 The file name of the terminal corresponding to the pty
538 is left in the variable pty_name. */
549 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
550 for (i
= 0; i
< 16; i
++)
553 #ifdef PTY_NAME_SPRINTF
556 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
557 #endif /* no PTY_NAME_SPRINTF */
561 #else /* no PTY_OPEN */
563 { /* Some systems name their pseudoterminals so that there are gaps in
564 the usual sequence - for example, on HP9000/S700 systems, there
565 are no pseudoterminals with names ending in 'f'. So we wait for
566 three failures in a row before deciding that we've reached the
568 int failed_count
= 0;
571 if (stat (pty_name
, &stb
) < 0)
574 if (failed_count
>= 3)
581 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
583 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
586 #endif /* no PTY_OPEN */
590 /* check to make certain that both sides are available
591 this avoids a nasty yet stupid bug in rlogins */
592 #ifdef PTY_TTY_NAME_SPRINTF
595 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
596 #endif /* no PTY_TTY_NAME_SPRINTF */
597 if (access (pty_name
, 6) != 0)
612 #endif /* HAVE_PTYS */
615 make_process (Lisp_Object name
)
617 register Lisp_Object val
, tem
, name1
;
618 register struct Lisp_Process
*p
;
622 p
= allocate_process ();
630 p
->raw_status_new
= 0;
632 p
->mark
= Fmake_marker ();
633 p
->kill_without_query
= 0;
635 #ifdef ADAPTIVE_READ_BUFFERING
636 p
->adaptive_read_buffering
= 0;
637 p
->read_output_delay
= 0;
638 p
->read_output_skip
= 0;
642 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
643 p
->gnutls_log_level
= 0;
647 /* If name is already in use, modify it until it is unused. */
652 tem
= Fget_process (name1
);
653 if (NILP (tem
)) break;
654 sprintf (suffix
, "<%d>", i
);
655 name1
= concat2 (name
, build_string (suffix
));
659 XSETPROCESS (val
, p
);
660 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
665 remove_process (register Lisp_Object proc
)
667 register Lisp_Object pair
;
669 pair
= Frassq (proc
, Vprocess_alist
);
670 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
672 deactivate_process (proc
);
676 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
677 doc
: /* Return t if OBJECT is a process. */)
680 return PROCESSP (object
) ? Qt
: Qnil
;
683 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
684 doc
: /* Return the process named NAME, or nil if there is none. */)
685 (register Lisp_Object name
)
690 return Fcdr (Fassoc (name
, Vprocess_alist
));
693 /* This is how commands for the user decode process arguments. It
694 accepts a process, a process name, a buffer, a buffer name, or nil.
695 Buffers denote the first process in the buffer, and nil denotes the
699 get_process (register Lisp_Object name
)
701 register Lisp_Object proc
, obj
;
704 obj
= Fget_process (name
);
706 obj
= Fget_buffer (name
);
708 error ("Process %s does not exist", SDATA (name
));
710 else if (NILP (name
))
711 obj
= Fcurrent_buffer ();
715 /* Now obj should be either a buffer object or a process object.
719 proc
= Fget_buffer_process (obj
);
721 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
733 /* Fdelete_process promises to immediately forget about the process, but in
734 reality, Emacs needs to remember those processes until they have been
735 treated by sigchld_handler; otherwise this handler would consider the
736 process as being synchronous and say that the synchronous process is
738 static Lisp_Object deleted_pid_list
;
741 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
742 doc
: /* Delete PROCESS: kill it and forget about it immediately.
743 PROCESS may be a process, a buffer, the name of a process or buffer, or
744 nil, indicating the current buffer's process. */)
745 (register Lisp_Object process
)
747 register struct Lisp_Process
*p
;
749 process
= get_process (process
);
750 p
= XPROCESS (process
);
752 p
->raw_status_new
= 0;
753 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
755 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
756 p
->tick
= ++process_tick
;
758 redisplay_preserve_echo_area (13);
760 else if (p
->infd
>= 0)
764 /* Assignment to EMACS_INT stops GCC whining about limited range
766 EMACS_INT pid
= p
->pid
;
768 /* No problem storing the pid here, as it is still in Vprocess_alist. */
769 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
770 /* GC treated elements set to nil. */
771 Fdelq (Qnil
, deleted_pid_list
));
772 /* If the process has already signaled, remove it from the list. */
773 if (p
->raw_status_new
)
776 if (CONSP (p
->status
))
777 symbol
= XCAR (p
->status
);
778 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
780 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
784 Fkill_process (process
, Qnil
);
785 /* Do this now, since remove_process will make sigchld_handler do nothing. */
787 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
788 p
->tick
= ++process_tick
;
790 redisplay_preserve_echo_area (13);
793 remove_process (process
);
797 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
798 doc
: /* Return the status of PROCESS.
799 The returned value is one of the following symbols:
800 run -- for a process that is running.
801 stop -- for a process stopped but continuable.
802 exit -- for a process that has exited.
803 signal -- for a process that has got a fatal signal.
804 open -- for a network stream connection that is open.
805 listen -- for a network stream server that is listening.
806 closed -- for a network stream connection that is closed.
807 connect -- when waiting for a non-blocking connection to complete.
808 failed -- when a non-blocking connection has failed.
809 nil -- if arg is a process name and no such process exists.
810 PROCESS may be a process, a buffer, the name of a process, or
811 nil, indicating the current buffer's process. */)
812 (register Lisp_Object process
)
814 register struct Lisp_Process
*p
;
815 register Lisp_Object status
;
817 if (STRINGP (process
))
818 process
= Fget_process (process
);
820 process
= get_process (process
);
825 p
= XPROCESS (process
);
826 if (p
->raw_status_new
)
830 status
= XCAR (status
);
831 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
833 if (EQ (status
, Qexit
))
835 else if (EQ (p
->command
, Qt
))
837 else if (EQ (status
, Qrun
))
843 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
845 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
846 If PROCESS has not yet exited or died, return 0. */)
847 (register Lisp_Object process
)
849 CHECK_PROCESS (process
);
850 if (XPROCESS (process
)->raw_status_new
)
851 update_status (XPROCESS (process
));
852 if (CONSP (XPROCESS (process
)->status
))
853 return XCAR (XCDR (XPROCESS (process
)->status
));
854 return make_number (0);
857 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
858 doc
: /* Return the process id of PROCESS.
859 This is the pid of the external process which PROCESS uses or talks to.
860 For a network connection, this value is nil. */)
861 (register Lisp_Object process
)
863 /* Assignment to EMACS_INT stops GCC whining about limited range of
867 CHECK_PROCESS (process
);
868 pid
= XPROCESS (process
)->pid
;
869 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
872 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
873 doc
: /* Return the name of PROCESS, as a string.
874 This is the name of the program invoked in PROCESS,
875 possibly modified to make it unique among process names. */)
876 (register Lisp_Object process
)
878 CHECK_PROCESS (process
);
879 return XPROCESS (process
)->name
;
882 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
883 doc
: /* Return the command that was executed to start PROCESS.
884 This is a list of strings, the first string being the program executed
885 and the rest of the strings being the arguments given to it.
886 For a network or serial process, this is nil (process is running) or t
887 \(process is stopped). */)
888 (register Lisp_Object process
)
890 CHECK_PROCESS (process
);
891 return XPROCESS (process
)->command
;
894 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
895 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
896 This is the terminal that the process itself reads and writes on,
897 not the name of the pty that Emacs uses to talk with that terminal. */)
898 (register Lisp_Object process
)
900 CHECK_PROCESS (process
);
901 return XPROCESS (process
)->tty_name
;
904 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
906 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
908 (register Lisp_Object process
, Lisp_Object buffer
)
910 struct Lisp_Process
*p
;
912 CHECK_PROCESS (process
);
914 CHECK_BUFFER (buffer
);
915 p
= XPROCESS (process
);
917 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
918 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
919 setup_process_coding_systems (process
);
923 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
925 doc
: /* Return the buffer PROCESS is associated with.
926 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
927 (register Lisp_Object process
)
929 CHECK_PROCESS (process
);
930 return XPROCESS (process
)->buffer
;
933 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
935 doc
: /* Return the marker for the end of the last output from PROCESS. */)
936 (register Lisp_Object process
)
938 CHECK_PROCESS (process
);
939 return XPROCESS (process
)->mark
;
942 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
944 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
945 A value of t means stop accepting output from the process.
947 When a process has a filter, its buffer is not used for output.
948 Instead, each time it does output, the entire string of output is
949 passed to the filter.
951 The filter gets two arguments: the process and the string of output.
952 The string argument is normally a multibyte string, except:
953 - if the process' input coding system is no-conversion or raw-text,
954 it is a unibyte string (the non-converted input), or else
955 - if `default-enable-multibyte-characters' is nil, it is a unibyte
956 string (the result of converting the decoded input multibyte
957 string to unibyte with `string-make-unibyte'). */)
958 (register Lisp_Object process
, Lisp_Object filter
)
960 struct Lisp_Process
*p
;
962 CHECK_PROCESS (process
);
963 p
= XPROCESS (process
);
965 /* Don't signal an error if the process' input file descriptor
966 is closed. This could make debugging Lisp more difficult,
967 for example when doing something like
969 (setq process (start-process ...))
971 (set-process-filter process ...) */
975 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
977 FD_CLR (p
->infd
, &input_wait_mask
);
978 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
980 else if (EQ (p
->filter
, Qt
)
981 /* Network or serial process not stopped: */
982 && !EQ (p
->command
, Qt
))
984 FD_SET (p
->infd
, &input_wait_mask
);
985 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
990 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
991 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
992 setup_process_coding_systems (process
);
996 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
998 doc
: /* Returns the filter function of PROCESS; nil if none.
999 See `set-process-filter' for more info on filter functions. */)
1000 (register Lisp_Object process
)
1002 CHECK_PROCESS (process
);
1003 return XPROCESS (process
)->filter
;
1006 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1008 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1009 The sentinel is called as a function when the process changes state.
1010 It gets two arguments: the process, and a string describing the change. */)
1011 (register Lisp_Object process
, Lisp_Object sentinel
)
1013 struct Lisp_Process
*p
;
1015 CHECK_PROCESS (process
);
1016 p
= XPROCESS (process
);
1018 p
->sentinel
= sentinel
;
1019 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1020 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1024 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1026 doc
: /* Return the sentinel of PROCESS; nil if none.
1027 See `set-process-sentinel' for more info on sentinels. */)
1028 (register Lisp_Object process
)
1030 CHECK_PROCESS (process
);
1031 return XPROCESS (process
)->sentinel
;
1034 DEFUN ("set-process-window-size", Fset_process_window_size
,
1035 Sset_process_window_size
, 3, 3, 0,
1036 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1037 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1039 CHECK_PROCESS (process
);
1040 CHECK_NATNUM (height
);
1041 CHECK_NATNUM (width
);
1043 if (XPROCESS (process
)->infd
< 0
1044 || set_window_size (XPROCESS (process
)->infd
,
1045 XINT (height
), XINT (width
)) <= 0)
1051 DEFUN ("set-process-inherit-coding-system-flag",
1052 Fset_process_inherit_coding_system_flag
,
1053 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1054 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1055 If the second argument FLAG is non-nil, then the variable
1056 `buffer-file-coding-system' of the buffer associated with PROCESS
1057 will be bound to the value of the coding system used to decode
1060 This is useful when the coding system specified for the process buffer
1061 leaves either the character code conversion or the end-of-line conversion
1062 unspecified, or if the coding system used to decode the process output
1063 is more appropriate for saving the process buffer.
1065 Binding the variable `inherit-process-coding-system' to non-nil before
1066 starting the process is an alternative way of setting the inherit flag
1067 for the process which will run. */)
1068 (register Lisp_Object process
, Lisp_Object flag
)
1070 CHECK_PROCESS (process
);
1071 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1075 DEFUN ("set-process-query-on-exit-flag",
1076 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1078 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1079 If the second argument FLAG is non-nil, Emacs will query the user before
1080 exiting or killing a buffer if PROCESS is running. */)
1081 (register Lisp_Object process
, Lisp_Object flag
)
1083 CHECK_PROCESS (process
);
1084 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1088 DEFUN ("process-query-on-exit-flag",
1089 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1091 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1092 (register Lisp_Object process
)
1094 CHECK_PROCESS (process
);
1095 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1098 #ifdef DATAGRAM_SOCKETS
1099 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1102 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1104 doc
: /* Return the contact info of PROCESS; t for a real child.
1105 For a network or serial connection, the value depends on the optional
1106 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1107 SERVICE) for a network connection or (PORT SPEED) for a serial
1108 connection. If KEY is t, the complete contact information for the
1109 connection is returned, else the specific value for the keyword KEY is
1110 returned. See `make-network-process' or `make-serial-process' for a
1111 list of keywords. */)
1112 (register Lisp_Object process
, Lisp_Object key
)
1114 Lisp_Object contact
;
1116 CHECK_PROCESS (process
);
1117 contact
= XPROCESS (process
)->childp
;
1119 #ifdef DATAGRAM_SOCKETS
1120 if (DATAGRAM_CONN_P (process
)
1121 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1122 contact
= Fplist_put (contact
, QCremote
,
1123 Fprocess_datagram_address (process
));
1126 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1128 if (NILP (key
) && NETCONN_P (process
))
1129 return Fcons (Fplist_get (contact
, QChost
),
1130 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1131 if (NILP (key
) && SERIALCONN_P (process
))
1132 return Fcons (Fplist_get (contact
, QCport
),
1133 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1134 return Fplist_get (contact
, key
);
1137 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1139 doc
: /* Return the plist of PROCESS. */)
1140 (register Lisp_Object process
)
1142 CHECK_PROCESS (process
);
1143 return XPROCESS (process
)->plist
;
1146 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1148 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1149 (register Lisp_Object process
, Lisp_Object plist
)
1151 CHECK_PROCESS (process
);
1154 XPROCESS (process
)->plist
= plist
;
1158 #if 0 /* Turned off because we don't currently record this info
1159 in the process. Perhaps add it. */
1160 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1161 doc
: /* Return the connection type of PROCESS.
1162 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1163 a socket connection. */)
1164 (Lisp_Object process
)
1166 return XPROCESS (process
)->type
;
1170 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1171 doc
: /* Return the connection type of PROCESS.
1172 The value is either the symbol `real', `network', or `serial'.
1173 PROCESS may be a process, a buffer, the name of a process or buffer, or
1174 nil, indicating the current buffer's process. */)
1175 (Lisp_Object process
)
1178 proc
= get_process (process
);
1179 return XPROCESS (proc
)->type
;
1182 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1184 doc
: /* Convert network ADDRESS from internal format to a string.
1185 A 4 or 5 element vector represents an IPv4 address (with port number).
1186 An 8 or 9 element vector represents an IPv6 address (with port number).
1187 If optional second argument OMIT-PORT is non-nil, don't include a port
1188 number in the string, even when present in ADDRESS.
1189 Returns nil if format of ADDRESS is invalid. */)
1190 (Lisp_Object address
, Lisp_Object omit_port
)
1195 if (STRINGP (address
)) /* AF_LOCAL */
1198 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1200 register struct Lisp_Vector
*p
= XVECTOR (address
);
1201 EMACS_INT size
= p
->header
.size
;
1202 Lisp_Object args
[10];
1205 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1207 args
[0] = build_string ("%d.%d.%d.%d");
1212 args
[0] = build_string ("%d.%d.%d.%d:%d");
1215 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1217 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1222 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1228 for (i
= 0; i
< nargs
; i
++)
1230 EMACS_INT element
= XINT (p
->contents
[i
]);
1232 if (element
< 0 || element
> 65535)
1235 if (nargs
<= 5 /* IPv4 */
1236 && i
< 4 /* host, not port */
1240 args
[i
+1] = p
->contents
[i
];
1243 return Fformat (nargs
+1, args
);
1246 if (CONSP (address
))
1248 Lisp_Object args
[2];
1249 args
[0] = build_string ("<Family %d>");
1250 args
[1] = Fcar (address
);
1251 return Fformat (2, args
);
1257 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1258 doc
: /* Return a list of all processes. */)
1261 return Fmapcar (Qcdr
, Vprocess_alist
);
1264 /* Starting asynchronous inferior processes. */
1266 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1268 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1269 doc
: /* Start a program in a subprocess. Return the process object for it.
1270 NAME is name for process. It is modified if necessary to make it unique.
1271 BUFFER is the buffer (or buffer name) to associate with the process.
1273 Process output (both standard output and standard error streams) goes
1274 at end of BUFFER, unless you specify an output stream or filter
1275 function to handle the output. BUFFER may also be nil, meaning that
1276 this process is not associated with any buffer.
1278 PROGRAM is the program file name. It is searched for in `exec-path'
1279 (which see). If nil, just associate a pty with the buffer. Remaining
1280 arguments are strings to give program as arguments.
1282 If you want to separate standard output from standard error, invoke
1283 the command through a shell and redirect one of them using the shell
1286 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1287 (ptrdiff_t nargs
, Lisp_Object
*args
)
1289 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1290 register unsigned char **new_argv
;
1292 int count
= SPECPDL_INDEX ();
1296 buffer
= Fget_buffer_create (buffer
);
1298 /* Make sure that the child will be able to chdir to the current
1299 buffer's current directory, or its unhandled equivalent. We
1300 can't just have the child check for an error when it does the
1301 chdir, since it's in a vfork.
1303 We have to GCPRO around this because Fexpand_file_name and
1304 Funhandled_file_name_directory might call a file name handling
1305 function. The argument list is protected by the caller, so all
1306 we really have to worry about is buffer. */
1308 struct gcpro gcpro1
, gcpro2
;
1310 current_dir
= BVAR (current_buffer
, directory
);
1312 GCPRO2 (buffer
, current_dir
);
1314 current_dir
= Funhandled_file_name_directory (current_dir
);
1315 if (NILP (current_dir
))
1316 /* If the file name handler says that current_dir is unreachable, use
1317 a sensible default. */
1318 current_dir
= build_string ("~/");
1319 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1320 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1321 report_file_error ("Setting current directory",
1322 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1328 CHECK_STRING (name
);
1332 if (!NILP (program
))
1333 CHECK_STRING (program
);
1335 proc
= make_process (name
);
1336 /* If an error occurs and we can't start the process, we want to
1337 remove it from the process list. This means that each error
1338 check in create_process doesn't need to call remove_process
1339 itself; it's all taken care of here. */
1340 record_unwind_protect (start_process_unwind
, proc
);
1342 XPROCESS (proc
)->childp
= Qt
;
1343 XPROCESS (proc
)->plist
= Qnil
;
1344 XPROCESS (proc
)->type
= Qreal
;
1345 XPROCESS (proc
)->buffer
= buffer
;
1346 XPROCESS (proc
)->sentinel
= Qnil
;
1347 XPROCESS (proc
)->filter
= Qnil
;
1348 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1351 /* AKA GNUTLS_INITSTAGE(proc). */
1352 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1353 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1356 #ifdef ADAPTIVE_READ_BUFFERING
1357 XPROCESS (proc
)->adaptive_read_buffering
1358 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1359 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1362 /* Make the process marker point into the process buffer (if any). */
1363 if (BUFFERP (buffer
))
1364 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1365 BUF_ZV (XBUFFER (buffer
)),
1366 BUF_ZV_BYTE (XBUFFER (buffer
)));
1369 /* Decide coding systems for communicating with the process. Here
1370 we don't setup the structure coding_system nor pay attention to
1371 unibyte mode. They are done in create_process. */
1373 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1374 Lisp_Object coding_systems
= Qt
;
1375 Lisp_Object val
, *args2
;
1376 struct gcpro gcpro1
, gcpro2
;
1378 val
= Vcoding_system_for_read
;
1381 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1382 args2
[0] = Qstart_process
;
1383 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1384 GCPRO2 (proc
, current_dir
);
1385 if (!NILP (program
))
1386 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1388 if (CONSP (coding_systems
))
1389 val
= XCAR (coding_systems
);
1390 else if (CONSP (Vdefault_process_coding_system
))
1391 val
= XCAR (Vdefault_process_coding_system
);
1393 XPROCESS (proc
)->decode_coding_system
= val
;
1395 val
= Vcoding_system_for_write
;
1398 if (EQ (coding_systems
, Qt
))
1400 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1401 args2
[0] = Qstart_process
;
1402 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1403 GCPRO2 (proc
, current_dir
);
1404 if (!NILP (program
))
1405 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1408 if (CONSP (coding_systems
))
1409 val
= XCDR (coding_systems
);
1410 else if (CONSP (Vdefault_process_coding_system
))
1411 val
= XCDR (Vdefault_process_coding_system
);
1413 XPROCESS (proc
)->encode_coding_system
= val
;
1414 /* Note: At this momemnt, the above coding system may leave
1415 text-conversion or eol-conversion unspecified. They will be
1416 decided after we read output from the process and decode it by
1417 some coding system, or just before we actually send a text to
1422 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1423 XPROCESS (proc
)->decoding_carryover
= 0;
1424 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1426 XPROCESS (proc
)->inherit_coding_system_flag
1427 = !(NILP (buffer
) || !inherit_process_coding_system
);
1429 if (!NILP (program
))
1431 /* If program file name is not absolute, search our path for it.
1432 Put the name we will really use in TEM. */
1433 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1434 && !(SCHARS (program
) > 1
1435 && IS_DEVICE_SEP (SREF (program
, 1))))
1437 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1440 GCPRO4 (name
, program
, buffer
, current_dir
);
1441 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1444 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1445 tem
= Fexpand_file_name (tem
, Qnil
);
1449 if (!NILP (Ffile_directory_p (program
)))
1450 error ("Specified program for new process is a directory");
1454 /* If program file name starts with /: for quoting a magic name,
1456 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1457 && SREF (tem
, 1) == ':')
1458 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1461 Lisp_Object arg_encoding
= Qnil
;
1462 struct gcpro gcpro1
;
1465 /* Encode the file name and put it in NEW_ARGV.
1466 That's where the child will use it to execute the program. */
1467 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1469 /* Here we encode arguments by the coding system used for sending
1470 data to the process. We don't support using different coding
1471 systems for encoding arguments and for encoding data sent to the
1474 for (i
= 3; i
< nargs
; i
++)
1476 tem
= Fcons (args
[i
], tem
);
1477 CHECK_STRING (XCAR (tem
));
1478 if (STRING_MULTIBYTE (XCAR (tem
)))
1480 if (NILP (arg_encoding
))
1481 arg_encoding
= (complement_process_encoding_system
1482 (XPROCESS (proc
)->encode_coding_system
));
1484 code_convert_string_norecord
1485 (XCAR (tem
), arg_encoding
, 1));
1492 /* Now that everything is encoded we can collect the strings into
1494 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1495 new_argv
[nargs
- 2] = 0;
1497 for (i
= nargs
- 2; i
-- != 0; )
1499 new_argv
[i
] = SDATA (XCAR (tem
));
1503 create_process (proc
, (char **) new_argv
, current_dir
);
1508 return unbind_to (count
, proc
);
1511 /* This function is the unwind_protect form for Fstart_process. If
1512 PROC doesn't have its pid set, then we know someone has signaled
1513 an error and the process wasn't started successfully, so we should
1514 remove it from the process list. */
1516 start_process_unwind (Lisp_Object proc
)
1518 if (!PROCESSP (proc
))
1521 /* Was PROC started successfully? */
1522 if (XPROCESS (proc
)->pid
== -1)
1523 remove_process (proc
);
1529 create_process_1 (struct atimer
*timer
)
1531 /* Nothing to do. */
1536 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1538 int inchannel
, outchannel
;
1541 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1542 int wait_child_setup
[2];
1546 struct sigaction sigint_action
;
1547 struct sigaction sigquit_action
;
1548 struct sigaction sigpipe_action
;
1550 struct sigaction sighup_action
;
1552 /* Use volatile to protect variables from being clobbered by longjmp. */
1553 volatile int forkin
, forkout
;
1554 volatile int pty_flag
= 0;
1556 extern char **environ
;
1559 inchannel
= outchannel
= -1;
1562 if (!NILP (Vprocess_connection_type
))
1563 outchannel
= inchannel
= allocate_pty ();
1567 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1568 /* On most USG systems it does not work to open the pty's tty here,
1569 then close it and reopen it in the child. */
1571 /* Don't let this terminal become our controlling terminal
1572 (in case we don't have one). */
1573 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1575 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1578 report_file_error ("Opening pty", Qnil
);
1580 forkin
= forkout
= -1;
1581 #endif /* not USG, or USG_SUBTTY_WORKS */
1585 #endif /* HAVE_PTYS */
1590 report_file_error ("Creating pipe", Qnil
);
1596 emacs_close (inchannel
);
1597 emacs_close (forkout
);
1598 report_file_error ("Creating pipe", Qnil
);
1604 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1608 tem
= pipe (wait_child_setup
);
1610 report_file_error ("Creating pipe", Qnil
);
1611 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1613 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1616 emacs_close (wait_child_setup
[0]);
1617 emacs_close (wait_child_setup
[1]);
1618 report_file_error ("Setting file descriptor flags", Qnil
);
1624 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1625 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1628 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1629 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1633 /* Record this as an active process, with its channels.
1634 As a result, child_setup will close Emacs's side of the pipes. */
1635 chan_process
[inchannel
] = process
;
1636 XPROCESS (process
)->infd
= inchannel
;
1637 XPROCESS (process
)->outfd
= outchannel
;
1639 /* Previously we recorded the tty descriptor used in the subprocess.
1640 It was only used for getting the foreground tty process, so now
1641 we just reopen the device (see emacs_get_tty_pgrp) as this is
1642 more portable (see USG_SUBTTY_WORKS above). */
1644 XPROCESS (process
)->pty_flag
= pty_flag
;
1645 XPROCESS (process
)->status
= Qrun
;
1646 setup_process_coding_systems (process
);
1648 /* Delay interrupts until we have a chance to store
1649 the new fork's pid in its process structure */
1650 sigemptyset (&blocked
);
1652 sigaddset (&blocked
, SIGCHLD
);
1654 #ifdef HAVE_WORKING_VFORK
1655 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1656 this sets the parent's signal handlers as well as the child's.
1657 So delay all interrupts whose handlers the child might munge,
1658 and record the current handlers so they can be restored later. */
1659 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1660 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1661 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1663 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1665 #endif /* HAVE_WORKING_VFORK */
1666 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1668 FD_SET (inchannel
, &input_wait_mask
);
1669 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1670 if (inchannel
> max_process_desc
)
1671 max_process_desc
= inchannel
;
1673 /* Until we store the proper pid, enable sigchld_handler
1674 to recognize an unknown pid as standing for this process.
1675 It is very important not to let this `marker' value stay
1676 in the table after this function has returned; if it does
1677 it might cause call-process to hang and subsequent asynchronous
1678 processes to get their return values scrambled. */
1679 XPROCESS (process
)->pid
= -1;
1684 /* child_setup must clobber environ on systems with true vfork.
1685 Protect it from permanent change. */
1686 char **save_environ
= environ
;
1687 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1692 #endif /* not WINDOWSNT */
1694 int xforkin
= forkin
;
1695 int xforkout
= forkout
;
1697 #if 0 /* This was probably a mistake--it duplicates code later on,
1698 but fails to handle all the cases. */
1699 /* Make sure SIGCHLD is not blocked in the child. */
1700 sigsetmask (SIGEMPTYMASK
);
1703 /* Make the pty be the controlling terminal of the process. */
1705 /* First, disconnect its current controlling terminal. */
1707 /* We tried doing setsid only if pty_flag, but it caused
1708 process_set_signal to fail on SGI when using a pipe. */
1710 /* Make the pty's terminal the controlling terminal. */
1711 if (pty_flag
&& xforkin
>= 0)
1714 /* We ignore the return value
1715 because faith@cs.unc.edu says that is necessary on Linux. */
1716 ioctl (xforkin
, TIOCSCTTY
, 0);
1719 #else /* not HAVE_SETSID */
1721 /* It's very important to call setpgrp here and no time
1722 afterwards. Otherwise, we lose our controlling tty which
1723 is set when we open the pty. */
1726 #endif /* not HAVE_SETSID */
1727 #if defined (LDISC1)
1728 if (pty_flag
&& xforkin
>= 0)
1731 tcgetattr (xforkin
, &t
);
1733 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1734 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1737 #if defined (NTTYDISC) && defined (TIOCSETD)
1738 if (pty_flag
&& xforkin
>= 0)
1740 /* Use new line discipline. */
1741 int ldisc
= NTTYDISC
;
1742 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1747 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1748 can do TIOCSPGRP only to the process's controlling tty. */
1751 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1752 I can't test it since I don't have 4.3. */
1753 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1756 ioctl (j
, TIOCNOTTY
, 0);
1760 /* In order to get a controlling terminal on some versions
1761 of BSD, it is necessary to put the process in pgrp 0
1762 before it opens the terminal. */
1770 #endif /* TIOCNOTTY */
1772 #if !defined (DONT_REOPEN_PTY)
1773 /*** There is a suggestion that this ought to be a
1774 conditional on TIOCSPGRP,
1775 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1776 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1777 that system does seem to need this code, even though
1778 both HAVE_SETSID and TIOCSCTTY are defined. */
1779 /* Now close the pty (if we had it open) and reopen it.
1780 This makes the pty the controlling terminal of the subprocess. */
1784 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1787 emacs_close (xforkin
);
1788 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1792 emacs_write (1, "Couldn't open the pty terminal ", 31);
1793 emacs_write (1, pty_name
, strlen (pty_name
));
1794 emacs_write (1, "\n", 1);
1799 #endif /* not DONT_REOPEN_PTY */
1801 #ifdef SETUP_SLAVE_PTY
1806 #endif /* SETUP_SLAVE_PTY */
1808 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1809 Now reenable it in the child, so it will die when we want it to. */
1811 signal (SIGHUP
, SIG_DFL
);
1813 #endif /* HAVE_PTYS */
1815 signal (SIGINT
, SIG_DFL
);
1816 signal (SIGQUIT
, SIG_DFL
);
1817 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1819 signal (SIGPIPE
, SIG_DFL
);
1821 /* Stop blocking signals in the child. */
1822 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1825 child_setup_tty (xforkout
);
1827 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1828 new_argv
, 1, encoded_current_dir
);
1829 #else /* not WINDOWSNT */
1831 emacs_close (wait_child_setup
[0]);
1833 child_setup (xforkin
, xforkout
, xforkout
,
1834 new_argv
, 1, encoded_current_dir
);
1835 #endif /* not WINDOWSNT */
1837 environ
= save_environ
;
1842 /* This runs in the Emacs process. */
1846 emacs_close (forkin
);
1847 if (forkin
!= forkout
&& forkout
>= 0)
1848 emacs_close (forkout
);
1852 /* vfork succeeded. */
1853 XPROCESS (process
)->pid
= pid
;
1856 register_child (pid
, inchannel
);
1857 #endif /* WINDOWSNT */
1859 /* If the subfork execv fails, and it exits,
1860 this close hangs. I don't know why.
1861 So have an interrupt jar it loose. */
1863 struct atimer
*timer
;
1867 EMACS_SET_SECS_USECS (offset
, 1, 0);
1868 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1871 emacs_close (forkin
);
1873 cancel_atimer (timer
);
1877 if (forkin
!= forkout
&& forkout
>= 0)
1878 emacs_close (forkout
);
1882 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1885 XPROCESS (process
)->tty_name
= Qnil
;
1887 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1888 /* Wait for child_setup to complete in case that vfork is
1889 actually defined as fork. The descriptor wait_child_setup[1]
1890 of a pipe is closed at the child side either by close-on-exec
1891 on successful execvp or the _exit call in child_setup. */
1895 emacs_close (wait_child_setup
[1]);
1896 emacs_read (wait_child_setup
[0], &dummy
, 1);
1897 emacs_close (wait_child_setup
[0]);
1902 /* Restore the signal state whether vfork succeeded or not.
1903 (We will signal an error, below, if it failed.) */
1904 #ifdef HAVE_WORKING_VFORK
1905 /* Restore the parent's signal handlers. */
1906 sigaction (SIGINT
, &sigint_action
, 0);
1907 sigaction (SIGQUIT
, &sigquit_action
, 0);
1908 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1910 sigaction (SIGHUP
, &sighup_action
, 0);
1912 #endif /* HAVE_WORKING_VFORK */
1913 /* Stop blocking signals in the parent. */
1914 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1916 /* Now generate the error if vfork failed. */
1918 report_file_error ("Doing vfork", Qnil
);
1922 create_pty (Lisp_Object process
)
1924 int inchannel
, outchannel
;
1927 inchannel
= outchannel
= -1;
1930 if (!NILP (Vprocess_connection_type
))
1931 outchannel
= inchannel
= allocate_pty ();
1935 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1936 /* On most USG systems it does not work to open the pty's tty here,
1937 then close it and reopen it in the child. */
1939 /* Don't let this terminal become our controlling terminal
1940 (in case we don't have one). */
1941 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1943 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1946 report_file_error ("Opening pty", Qnil
);
1947 #if defined (DONT_REOPEN_PTY)
1948 /* In the case that vfork is defined as fork, the parent process
1949 (Emacs) may send some data before the child process completes
1950 tty options setup. So we setup tty before forking. */
1951 child_setup_tty (forkout
);
1952 #endif /* DONT_REOPEN_PTY */
1953 #endif /* not USG, or USG_SUBTTY_WORKS */
1956 #endif /* HAVE_PTYS */
1959 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1960 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1963 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1964 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1968 /* Record this as an active process, with its channels.
1969 As a result, child_setup will close Emacs's side of the pipes. */
1970 chan_process
[inchannel
] = process
;
1971 XPROCESS (process
)->infd
= inchannel
;
1972 XPROCESS (process
)->outfd
= outchannel
;
1974 /* Previously we recorded the tty descriptor used in the subprocess.
1975 It was only used for getting the foreground tty process, so now
1976 we just reopen the device (see emacs_get_tty_pgrp) as this is
1977 more portable (see USG_SUBTTY_WORKS above). */
1979 XPROCESS (process
)->pty_flag
= pty_flag
;
1980 XPROCESS (process
)->status
= Qrun
;
1981 setup_process_coding_systems (process
);
1983 FD_SET (inchannel
, &input_wait_mask
);
1984 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1985 if (inchannel
> max_process_desc
)
1986 max_process_desc
= inchannel
;
1988 XPROCESS (process
)->pid
= -2;
1991 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1994 XPROCESS (process
)->tty_name
= Qnil
;
1998 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1999 The address family of sa is not included in the result. */
2002 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2004 Lisp_Object address
;
2007 register struct Lisp_Vector
*p
;
2009 /* Workaround for a bug in getsockname on BSD: Names bound to
2010 sockets in the UNIX domain are inaccessible; getsockname returns
2011 a zero length name. */
2012 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2013 return empty_unibyte_string
;
2015 switch (sa
->sa_family
)
2019 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2020 len
= sizeof (sin
->sin_addr
) + 1;
2021 address
= Fmake_vector (make_number (len
), Qnil
);
2022 p
= XVECTOR (address
);
2023 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2024 cp
= (unsigned char *) &sin
->sin_addr
;
2030 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2031 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2032 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2033 address
= Fmake_vector (make_number (len
), Qnil
);
2034 p
= XVECTOR (address
);
2035 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2036 for (i
= 0; i
< len
; i
++)
2037 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2041 #ifdef HAVE_LOCAL_SOCKETS
2044 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2045 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2046 if (sockun
->sun_path
[i
] == 0)
2048 return make_unibyte_string (sockun
->sun_path
, i
);
2052 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2053 address
= Fcons (make_number (sa
->sa_family
),
2054 Fmake_vector (make_number (len
), Qnil
));
2055 p
= XVECTOR (XCDR (address
));
2056 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2062 p
->contents
[i
++] = make_number (*cp
++);
2068 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2071 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2073 register struct Lisp_Vector
*p
;
2075 if (VECTORP (address
))
2077 p
= XVECTOR (address
);
2078 if (p
->header
.size
== 5)
2081 return sizeof (struct sockaddr_in
);
2084 else if (p
->header
.size
== 9)
2086 *familyp
= AF_INET6
;
2087 return sizeof (struct sockaddr_in6
);
2091 #ifdef HAVE_LOCAL_SOCKETS
2092 else if (STRINGP (address
))
2094 *familyp
= AF_LOCAL
;
2095 return sizeof (struct sockaddr_un
);
2098 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2100 struct sockaddr
*sa
;
2101 *familyp
= XINT (XCAR (address
));
2102 p
= XVECTOR (XCDR (address
));
2103 return p
->header
.size
+ sizeof (sa
->sa_family
);
2108 /* Convert an address object (vector or string) to an internal sockaddr.
2110 The address format has been basically validated by
2111 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2112 it could have come from user data. So if FAMILY is not valid,
2113 we return after zeroing *SA. */
2116 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2118 register struct Lisp_Vector
*p
;
2119 register unsigned char *cp
= NULL
;
2122 memset (sa
, 0, len
);
2124 if (VECTORP (address
))
2126 p
= XVECTOR (address
);
2127 if (family
== AF_INET
)
2129 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2130 len
= sizeof (sin
->sin_addr
) + 1;
2131 i
= XINT (p
->contents
[--len
]);
2132 sin
->sin_port
= htons (i
);
2133 cp
= (unsigned char *)&sin
->sin_addr
;
2134 sa
->sa_family
= family
;
2137 else if (family
== AF_INET6
)
2139 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2140 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2141 len
= sizeof (sin6
->sin6_addr
) + 1;
2142 i
= XINT (p
->contents
[--len
]);
2143 sin6
->sin6_port
= htons (i
);
2144 for (i
= 0; i
< len
; i
++)
2145 if (INTEGERP (p
->contents
[i
]))
2147 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2150 sa
->sa_family
= family
;
2157 else if (STRINGP (address
))
2159 #ifdef HAVE_LOCAL_SOCKETS
2160 if (family
== AF_LOCAL
)
2162 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2163 cp
= SDATA (address
);
2164 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2165 sockun
->sun_path
[i
] = *cp
++;
2166 sa
->sa_family
= family
;
2173 p
= XVECTOR (XCDR (address
));
2174 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2177 for (i
= 0; i
< len
; i
++)
2178 if (INTEGERP (p
->contents
[i
]))
2179 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2182 #ifdef DATAGRAM_SOCKETS
2183 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2185 doc
: /* Get the current datagram address associated with PROCESS. */)
2186 (Lisp_Object process
)
2190 CHECK_PROCESS (process
);
2192 if (!DATAGRAM_CONN_P (process
))
2195 channel
= XPROCESS (process
)->infd
;
2196 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2197 datagram_address
[channel
].len
);
2200 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2202 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2203 Returns nil upon error setting address, ADDRESS otherwise. */)
2204 (Lisp_Object process
, Lisp_Object address
)
2209 CHECK_PROCESS (process
);
2211 if (!DATAGRAM_CONN_P (process
))
2214 channel
= XPROCESS (process
)->infd
;
2216 len
= get_lisp_to_sockaddr_size (address
, &family
);
2217 if (datagram_address
[channel
].len
!= len
)
2219 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2225 static const struct socket_options
{
2226 /* The name of this option. Should be lowercase version of option
2227 name without SO_ prefix. */
2229 /* Option level SOL_... */
2231 /* Option number SO_... */
2233 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2234 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2235 } socket_options
[] =
2237 #ifdef SO_BINDTODEVICE
2238 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2241 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2244 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2247 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2250 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2253 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2256 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2259 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2261 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2264 /* Set option OPT to value VAL on socket S.
2266 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2267 Signals an error if setting a known option fails.
2271 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2274 const struct socket_options
*sopt
;
2279 name
= SSDATA (SYMBOL_NAME (opt
));
2280 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2281 if (strcmp (name
, sopt
->name
) == 0)
2284 switch (sopt
->opttype
)
2289 optval
= NILP (val
) ? 0 : 1;
2290 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2291 &optval
, sizeof (optval
));
2299 optval
= XINT (val
);
2301 error ("Bad option value for %s", name
);
2302 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2303 &optval
, sizeof (optval
));
2307 #ifdef SO_BINDTODEVICE
2310 char devname
[IFNAMSIZ
+1];
2312 /* This is broken, at least in the Linux 2.4 kernel.
2313 To unbind, the arg must be a zero integer, not the empty string.
2314 This should work on all systems. KFS. 2003-09-23. */
2315 memset (devname
, 0, sizeof devname
);
2318 char *arg
= SSDATA (val
);
2319 int len
= min (strlen (arg
), IFNAMSIZ
);
2320 memcpy (devname
, arg
, len
);
2322 else if (!NILP (val
))
2323 error ("Bad option value for %s", name
);
2324 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2333 struct linger linger
;
2336 linger
.l_linger
= 0;
2338 linger
.l_linger
= XINT (val
);
2340 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2341 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2342 &linger
, sizeof (linger
));
2352 report_file_error ("Cannot set network option",
2353 Fcons (opt
, Fcons (val
, Qnil
)));
2354 return (1 << sopt
->optbit
);
2358 DEFUN ("set-network-process-option",
2359 Fset_network_process_option
, Sset_network_process_option
,
2361 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2362 See `make-network-process' for a list of options and values.
2363 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2364 OPTION is not a supported option, return nil instead; otherwise return t. */)
2365 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2368 struct Lisp_Process
*p
;
2370 CHECK_PROCESS (process
);
2371 p
= XPROCESS (process
);
2372 if (!NETCONN1_P (p
))
2373 error ("Process is not a network process");
2377 error ("Process is not running");
2379 if (set_socket_option (s
, option
, value
))
2381 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2385 if (NILP (no_error
))
2386 error ("Unknown or unsupported option");
2392 DEFUN ("serial-process-configure",
2393 Fserial_process_configure
,
2394 Sserial_process_configure
,
2396 doc
: /* Configure speed, bytesize, etc. of a serial process.
2398 Arguments are specified as keyword/argument pairs. Attributes that
2399 are not given are re-initialized from the process's current
2400 configuration (available via the function `process-contact') or set to
2401 reasonable default values. The following arguments are defined:
2407 -- Any of these arguments can be given to identify the process that is
2408 to be configured. If none of these arguments is given, the current
2409 buffer's process is used.
2411 :speed SPEED -- SPEED is the speed of the serial port in bits per
2412 second, also called baud rate. Any value can be given for SPEED, but
2413 most serial ports work only at a few defined values between 1200 and
2414 115200, with 9600 being the most common value. If SPEED is nil, the
2415 serial port is not configured any further, i.e., all other arguments
2416 are ignored. This may be useful for special serial ports such as
2417 Bluetooth-to-serial converters which can only be configured through AT
2418 commands. A value of nil for SPEED can be used only when passed
2419 through `make-serial-process' or `serial-term'.
2421 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2422 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2424 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2425 `odd' (use odd parity), or the symbol `even' (use even parity). If
2426 PARITY is not given, no parity is used.
2428 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2429 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2430 is not given or nil, 1 stopbit is used.
2432 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2433 flowcontrol to be used, which is either nil (don't use flowcontrol),
2434 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2435 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2436 flowcontrol is used.
2438 `serial-process-configure' is called by `make-serial-process' for the
2439 initial configuration of the serial port.
2443 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2445 \(serial-process-configure
2446 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2448 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2450 usage: (serial-process-configure &rest ARGS) */)
2451 (ptrdiff_t nargs
, Lisp_Object
*args
)
2453 struct Lisp_Process
*p
;
2454 Lisp_Object contact
= Qnil
;
2455 Lisp_Object proc
= Qnil
;
2456 struct gcpro gcpro1
;
2458 contact
= Flist (nargs
, args
);
2461 proc
= Fplist_get (contact
, QCprocess
);
2463 proc
= Fplist_get (contact
, QCname
);
2465 proc
= Fplist_get (contact
, QCbuffer
);
2467 proc
= Fplist_get (contact
, QCport
);
2468 proc
= get_process (proc
);
2469 p
= XPROCESS (proc
);
2470 if (!EQ (p
->type
, Qserial
))
2471 error ("Not a serial process");
2473 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2479 serial_configure (p
, contact
);
2485 /* Used by make-serial-process to recover from errors. */
2487 make_serial_process_unwind (Lisp_Object proc
)
2489 if (!PROCESSP (proc
))
2491 remove_process (proc
);
2495 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2497 doc
: /* Create and return a serial port process.
2499 In Emacs, serial port connections are represented by process objects,
2500 so input and output work as for subprocesses, and `delete-process'
2501 closes a serial port connection. However, a serial process has no
2502 process id, it cannot be signaled, and the status codes are different
2503 from normal processes.
2505 `make-serial-process' creates a process and a buffer, on which you
2506 probably want to use `process-send-string'. Try \\[serial-term] for
2507 an interactive terminal. See below for examples.
2509 Arguments are specified as keyword/argument pairs. The following
2510 arguments are defined:
2512 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2513 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2514 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2515 the backslashes in strings).
2517 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2518 which is called by `make-serial-process'.
2520 :name NAME -- NAME is the name of the process. If NAME is not given,
2521 the value of PORT is used.
2523 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2524 with the process. Process output goes at the end of that buffer,
2525 unless you specify an output stream or filter function to handle the
2526 output. If BUFFER is not given, the value of NAME is used.
2528 :coding CODING -- If CODING is a symbol, it specifies the coding
2529 system used for both reading and writing for this process. If CODING
2530 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2531 ENCODING is used for writing.
2533 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2534 the process is running. If BOOL is not given, query before exiting.
2536 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2537 In the stopped state, a serial process does not accept incoming data,
2538 but you can send outgoing data. The stopped state is cleared by
2539 `continue-process' and set by `stop-process'.
2541 :filter FILTER -- Install FILTER as the process filter.
2543 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2545 :plist PLIST -- Install PLIST as the initial plist of the process.
2552 -- These arguments are handled by `serial-process-configure', which is
2553 called by `make-serial-process'.
2555 The original argument list, possibly modified by later configuration,
2556 is available via the function `process-contact'.
2560 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2562 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2564 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2566 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2568 usage: (make-serial-process &rest ARGS) */)
2569 (ptrdiff_t nargs
, Lisp_Object
*args
)
2572 Lisp_Object proc
, contact
, port
;
2573 struct Lisp_Process
*p
;
2574 struct gcpro gcpro1
;
2575 Lisp_Object name
, buffer
;
2576 Lisp_Object tem
, val
;
2577 int specpdl_count
= -1;
2582 contact
= Flist (nargs
, args
);
2585 port
= Fplist_get (contact
, QCport
);
2587 error ("No port specified");
2588 CHECK_STRING (port
);
2590 if (NILP (Fplist_member (contact
, QCspeed
)))
2591 error (":speed not specified");
2592 if (!NILP (Fplist_get (contact
, QCspeed
)))
2593 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2595 name
= Fplist_get (contact
, QCname
);
2598 CHECK_STRING (name
);
2599 proc
= make_process (name
);
2600 specpdl_count
= SPECPDL_INDEX ();
2601 record_unwind_protect (make_serial_process_unwind
, proc
);
2602 p
= XPROCESS (proc
);
2604 fd
= serial_open (SSDATA (port
));
2607 if (fd
> max_process_desc
)
2608 max_process_desc
= fd
;
2609 chan_process
[fd
] = proc
;
2611 buffer
= Fplist_get (contact
, QCbuffer
);
2614 buffer
= Fget_buffer_create (buffer
);
2617 p
->childp
= contact
;
2618 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2620 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2621 p
->filter
= Fplist_get (contact
, QCfilter
);
2623 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2624 p
->kill_without_query
= 1;
2625 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2629 if (!EQ (p
->command
, Qt
))
2631 FD_SET (fd
, &input_wait_mask
);
2632 FD_SET (fd
, &non_keyboard_wait_mask
);
2635 if (BUFFERP (buffer
))
2637 set_marker_both (p
->mark
, buffer
,
2638 BUF_ZV (XBUFFER (buffer
)),
2639 BUF_ZV_BYTE (XBUFFER (buffer
)));
2642 tem
= Fplist_member (contact
, QCcoding
);
2643 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2649 val
= XCAR (XCDR (tem
));
2653 else if (!NILP (Vcoding_system_for_read
))
2654 val
= Vcoding_system_for_read
;
2655 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2656 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2658 p
->decode_coding_system
= val
;
2663 val
= XCAR (XCDR (tem
));
2667 else if (!NILP (Vcoding_system_for_write
))
2668 val
= Vcoding_system_for_write
;
2669 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2670 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2672 p
->encode_coding_system
= val
;
2674 setup_process_coding_systems (proc
);
2675 p
->decoding_buf
= empty_unibyte_string
;
2676 p
->decoding_carryover
= 0;
2677 p
->encoding_buf
= empty_unibyte_string
;
2678 p
->inherit_coding_system_flag
2679 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2681 Fserial_process_configure (nargs
, args
);
2683 specpdl_ptr
= specpdl
+ specpdl_count
;
2689 /* Create a network stream/datagram client/server process. Treated
2690 exactly like a normal process when reading and writing. Primary
2691 differences are in status display and process deletion. A network
2692 connection has no PID; you cannot signal it. All you can do is
2693 stop/continue it and deactivate/close it via delete-process */
2695 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2697 doc
: /* Create and return a network server or client process.
2699 In Emacs, network connections are represented by process objects, so
2700 input and output work as for subprocesses and `delete-process' closes
2701 a network connection. However, a network process has no process id,
2702 it cannot be signaled, and the status codes are different from normal
2705 Arguments are specified as keyword/argument pairs. The following
2706 arguments are defined:
2708 :name NAME -- NAME is name for process. It is modified if necessary
2711 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2712 with the process. Process output goes at end of that buffer, unless
2713 you specify an output stream or filter function to handle the output.
2714 BUFFER may be also nil, meaning that this process is not associated
2717 :host HOST -- HOST is name of the host to connect to, or its IP
2718 address. The symbol `local' specifies the local host. If specified
2719 for a server process, it must be a valid name or address for the local
2720 host, and only clients connecting to that address will be accepted.
2722 :service SERVICE -- SERVICE is name of the service desired, or an
2723 integer specifying a port number to connect to. If SERVICE is t,
2724 a random port number is selected for the server. (If Emacs was
2725 compiled with getaddrinfo, a port number can also be specified as a
2726 string, e.g. "80", as well as an integer. This is not portable.)
2728 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2729 stream type connection, `datagram' creates a datagram type connection,
2730 `seqpacket' creates a reliable datagram connection.
2732 :family FAMILY -- FAMILY is the address (and protocol) family for the
2733 service specified by HOST and SERVICE. The default (nil) is to use
2734 whatever address family (IPv4 or IPv6) that is defined for the host
2735 and port number specified by HOST and SERVICE. Other address families
2737 local -- for a local (i.e. UNIX) address specified by SERVICE.
2738 ipv4 -- use IPv4 address family only.
2739 ipv6 -- use IPv6 address family only.
2741 :local ADDRESS -- ADDRESS is the local address used for the connection.
2742 This parameter is ignored when opening a client process. When specified
2743 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2745 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2746 connection. This parameter is ignored when opening a stream server
2747 process. For a datagram server process, it specifies the initial
2748 setting of the remote datagram address. When specified for a client
2749 process, the FAMILY, HOST, and SERVICE args are ignored.
2751 The format of ADDRESS depends on the address family:
2752 - An IPv4 address is represented as an vector of integers [A B C D P]
2753 corresponding to numeric IP address A.B.C.D and port number P.
2754 - A local address is represented as a string with the address in the
2755 local address space.
2756 - An "unsupported family" address is represented by a cons (F . AV)
2757 where F is the family number and AV is a vector containing the socket
2758 address data with one element per address data byte. Do not rely on
2759 this format in portable code, as it may depend on implementation
2760 defined constants, data sizes, and data structure alignment.
2762 :coding CODING -- If CODING is a symbol, it specifies the coding
2763 system used for both reading and writing for this process. If CODING
2764 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2765 ENCODING is used for writing.
2767 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2768 return without waiting for the connection to complete; instead, the
2769 sentinel function will be called with second arg matching "open" (if
2770 successful) or "failed" when the connect completes. Default is to use
2771 a blocking connect (i.e. wait) for stream type connections.
2773 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2774 running when Emacs is exited.
2776 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2777 In the stopped state, a server process does not accept new
2778 connections, and a client process does not handle incoming traffic.
2779 The stopped state is cleared by `continue-process' and set by
2782 :filter FILTER -- Install FILTER as the process filter.
2784 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2785 process filter are multibyte, otherwise they are unibyte.
2786 If this keyword is not specified, the strings are multibyte if
2787 `default-enable-multibyte-characters' is non-nil.
2789 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2791 :log LOG -- Install LOG as the server process log function. This
2792 function is called when the server accepts a network connection from a
2793 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2794 is the server process, CLIENT is the new process for the connection,
2795 and MESSAGE is a string.
2797 :plist PLIST -- Install PLIST as the new process' initial plist.
2799 :server QLEN -- if QLEN is non-nil, create a server process for the
2800 specified FAMILY, SERVICE, and connection type (stream or datagram).
2801 If QLEN is an integer, it is used as the max. length of the server's
2802 pending connection queue (also known as the backlog); the default
2803 queue length is 5. Default is to create a client process.
2805 The following network options can be specified for this connection:
2807 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2808 :dontroute BOOL -- Only send to directly connected hosts.
2809 :keepalive BOOL -- Send keep-alive messages on network stream.
2810 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2811 :oobinline BOOL -- Place out-of-band data in receive data stream.
2812 :priority INT -- Set protocol defined priority for sent packets.
2813 :reuseaddr BOOL -- Allow reusing a recently used local address
2814 (this is allowed by default for a server process).
2815 :bindtodevice NAME -- bind to interface NAME. Using this may require
2816 special privileges on some systems.
2818 Consult the relevant system programmer's manual pages for more
2819 information on using these options.
2822 A server process will listen for and accept connections from clients.
2823 When a client connection is accepted, a new network process is created
2824 for the connection with the following parameters:
2826 - The client's process name is constructed by concatenating the server
2827 process' NAME and a client identification string.
2828 - If the FILTER argument is non-nil, the client process will not get a
2829 separate process buffer; otherwise, the client's process buffer is a newly
2830 created buffer named after the server process' BUFFER name or process
2831 NAME concatenated with the client identification string.
2832 - The connection type and the process filter and sentinel parameters are
2833 inherited from the server process' TYPE, FILTER and SENTINEL.
2834 - The client process' contact info is set according to the client's
2835 addressing information (typically an IP address and a port number).
2836 - The client process' plist is initialized from the server's plist.
2838 Notice that the FILTER and SENTINEL args are never used directly by
2839 the server process. Also, the BUFFER argument is not used directly by
2840 the server process, but via the optional :log function, accepted (and
2841 failed) connections may be logged in the server process' buffer.
2843 The original argument list, modified with the actual connection
2844 information, is available via the `process-contact' function.
2846 usage: (make-network-process &rest ARGS) */)
2847 (ptrdiff_t nargs
, Lisp_Object
*args
)
2850 Lisp_Object contact
;
2851 struct Lisp_Process
*p
;
2852 #ifdef HAVE_GETADDRINFO
2853 struct addrinfo ai
, *res
, *lres
;
2854 struct addrinfo hints
;
2855 const char *portstring
;
2857 #else /* HAVE_GETADDRINFO */
2858 struct _emacs_addrinfo
2864 struct sockaddr
*ai_addr
;
2865 struct _emacs_addrinfo
*ai_next
;
2867 #endif /* HAVE_GETADDRINFO */
2868 struct sockaddr_in address_in
;
2869 #ifdef HAVE_LOCAL_SOCKETS
2870 struct sockaddr_un address_un
;
2875 int s
= -1, outch
, inch
;
2876 struct gcpro gcpro1
;
2877 int count
= SPECPDL_INDEX ();
2879 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2881 Lisp_Object name
, buffer
, host
, service
, address
;
2882 Lisp_Object filter
, sentinel
;
2883 int is_non_blocking_client
= 0;
2884 int is_server
= 0, backlog
= 5;
2891 /* Save arguments for process-contact and clone-process. */
2892 contact
= Flist (nargs
, args
);
2896 /* Ensure socket support is loaded if available. */
2897 init_winsock (TRUE
);
2900 /* :type TYPE (nil: stream, datagram */
2901 tem
= Fplist_get (contact
, QCtype
);
2903 socktype
= SOCK_STREAM
;
2904 #ifdef DATAGRAM_SOCKETS
2905 else if (EQ (tem
, Qdatagram
))
2906 socktype
= SOCK_DGRAM
;
2908 #ifdef HAVE_SEQPACKET
2909 else if (EQ (tem
, Qseqpacket
))
2910 socktype
= SOCK_SEQPACKET
;
2913 error ("Unsupported connection type");
2916 tem
= Fplist_get (contact
, QCserver
);
2919 /* Don't support network sockets when non-blocking mode is
2920 not available, since a blocked Emacs is not useful. */
2921 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
2922 error ("Network servers not supported");
2926 backlog
= XINT (tem
);
2930 /* Make QCaddress an alias for :local (server) or :remote (client). */
2931 QCaddress
= is_server
? QClocal
: QCremote
;
2934 if (!is_server
&& socktype
!= SOCK_DGRAM
2935 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2937 #ifndef NON_BLOCKING_CONNECT
2938 error ("Non-blocking connect not supported");
2940 is_non_blocking_client
= 1;
2944 name
= Fplist_get (contact
, QCname
);
2945 buffer
= Fplist_get (contact
, QCbuffer
);
2946 filter
= Fplist_get (contact
, QCfilter
);
2947 sentinel
= Fplist_get (contact
, QCsentinel
);
2949 CHECK_STRING (name
);
2951 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2952 ai
.ai_socktype
= socktype
;
2957 /* :local ADDRESS or :remote ADDRESS */
2958 address
= Fplist_get (contact
, QCaddress
);
2959 if (!NILP (address
))
2961 host
= service
= Qnil
;
2963 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2964 error ("Malformed :address");
2965 ai
.ai_family
= family
;
2966 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2967 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2971 /* :family FAMILY -- nil (for Inet), local, or integer. */
2972 tem
= Fplist_get (contact
, QCfamily
);
2975 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
2981 #ifdef HAVE_LOCAL_SOCKETS
2982 else if (EQ (tem
, Qlocal
))
2986 else if (EQ (tem
, Qipv6
))
2989 else if (EQ (tem
, Qipv4
))
2991 else if (INTEGERP (tem
))
2992 family
= XINT (tem
);
2994 error ("Unknown address family");
2996 ai
.ai_family
= family
;
2998 /* :service SERVICE -- string, integer (port number), or t (random port). */
2999 service
= Fplist_get (contact
, QCservice
);
3001 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3002 host
= Fplist_get (contact
, QChost
);
3005 if (EQ (host
, Qlocal
))
3006 /* Depending on setup, "localhost" may map to different IPv4 and/or
3007 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3008 host
= build_string ("127.0.0.1");
3009 CHECK_STRING (host
);
3012 #ifdef HAVE_LOCAL_SOCKETS
3013 if (family
== AF_LOCAL
)
3017 message (":family local ignores the :host \"%s\" property",
3019 contact
= Fplist_put (contact
, QChost
, Qnil
);
3022 CHECK_STRING (service
);
3023 memset (&address_un
, 0, sizeof address_un
);
3024 address_un
.sun_family
= AF_LOCAL
;
3025 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3026 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3027 ai
.ai_addrlen
= sizeof address_un
;
3032 /* Slow down polling to every ten seconds.
3033 Some kernels have a bug which causes retrying connect to fail
3034 after a connect. Polling can interfere with gethostbyname too. */
3035 #ifdef POLL_FOR_INPUT
3036 if (socktype
!= SOCK_DGRAM
)
3038 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3039 bind_polling_period (10);
3043 #ifdef HAVE_GETADDRINFO
3044 /* If we have a host, use getaddrinfo to resolve both host and service.
3045 Otherwise, use getservbyname to lookup the service. */
3049 /* SERVICE can either be a string or int.
3050 Convert to a C string for later use by getaddrinfo. */
3051 if (EQ (service
, Qt
))
3053 else if (INTEGERP (service
))
3055 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3056 portstring
= portbuf
;
3060 CHECK_STRING (service
);
3061 portstring
= SSDATA (service
);
3066 memset (&hints
, 0, sizeof (hints
));
3068 hints
.ai_family
= family
;
3069 hints
.ai_socktype
= socktype
;
3070 hints
.ai_protocol
= 0;
3072 #ifdef HAVE_RES_INIT
3076 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3078 #ifdef HAVE_GAI_STRERROR
3079 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3081 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3087 #endif /* HAVE_GETADDRINFO */
3089 /* We end up here if getaddrinfo is not defined, or in case no hostname
3090 has been specified (e.g. for a local server process). */
3092 if (EQ (service
, Qt
))
3094 else if (INTEGERP (service
))
3095 port
= htons ((unsigned short) XINT (service
));
3098 struct servent
*svc_info
;
3099 CHECK_STRING (service
);
3100 svc_info
= getservbyname (SSDATA (service
),
3101 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3103 error ("Unknown service: %s", SDATA (service
));
3104 port
= svc_info
->s_port
;
3107 memset (&address_in
, 0, sizeof address_in
);
3108 address_in
.sin_family
= family
;
3109 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3110 address_in
.sin_port
= port
;
3112 #ifndef HAVE_GETADDRINFO
3115 struct hostent
*host_info_ptr
;
3117 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3118 as it may `hang' Emacs for a very long time. */
3122 #ifdef HAVE_RES_INIT
3126 host_info_ptr
= gethostbyname (SDATA (host
));
3131 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3132 host_info_ptr
->h_length
);
3133 family
= host_info_ptr
->h_addrtype
;
3134 address_in
.sin_family
= family
;
3137 /* Attempt to interpret host as numeric inet address */
3139 unsigned long numeric_addr
;
3140 numeric_addr
= inet_addr (SSDATA (host
));
3141 if (numeric_addr
== -1)
3142 error ("Unknown host \"%s\"", SDATA (host
));
3144 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3145 sizeof (address_in
.sin_addr
));
3149 #endif /* not HAVE_GETADDRINFO */
3151 ai
.ai_family
= family
;
3152 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3153 ai
.ai_addrlen
= sizeof address_in
;
3157 /* Do this in case we never enter the for-loop below. */
3158 count1
= SPECPDL_INDEX ();
3161 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3170 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3177 #ifdef DATAGRAM_SOCKETS
3178 if (!is_server
&& socktype
== SOCK_DGRAM
)
3180 #endif /* DATAGRAM_SOCKETS */
3182 #ifdef NON_BLOCKING_CONNECT
3183 if (is_non_blocking_client
)
3186 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3188 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3200 /* Make us close S if quit. */
3201 record_unwind_protect (close_file_unwind
, make_number (s
));
3203 /* Parse network options in the arg list.
3204 We simply ignore anything which isn't a known option (including other keywords).
3205 An error is signaled if setting a known option fails. */
3206 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3207 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3211 /* Configure as a server socket. */
3213 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3214 explicit :reuseaddr key to override this. */
3215 #ifdef HAVE_LOCAL_SOCKETS
3216 if (family
!= AF_LOCAL
)
3218 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3221 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3222 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3225 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3226 report_file_error ("Cannot bind server socket", Qnil
);
3228 #ifdef HAVE_GETSOCKNAME
3229 if (EQ (service
, Qt
))
3231 struct sockaddr_in sa1
;
3232 socklen_t len1
= sizeof (sa1
);
3233 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3235 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3236 service
= make_number (ntohs (sa1
.sin_port
));
3237 contact
= Fplist_put (contact
, QCservice
, service
);
3242 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3243 report_file_error ("Cannot listen on server socket", Qnil
);
3251 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3254 if (ret
== 0 || xerrno
== EISCONN
)
3256 /* The unwind-protect will be discarded afterwards.
3257 Likewise for immediate_quit. */
3261 #ifdef NON_BLOCKING_CONNECT
3263 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3267 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3274 if (xerrno
== EINTR
)
3276 /* Unlike most other syscalls connect() cannot be called
3277 again. (That would return EALREADY.) The proper way to
3278 wait for completion is select(). */
3286 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3293 report_file_error ("select failed", Qnil
);
3297 len
= sizeof xerrno
;
3298 eassert (FD_ISSET (s
, &fdset
));
3299 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3300 report_file_error ("getsockopt failed", Qnil
);
3302 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3306 #endif /* !WINDOWSNT */
3310 /* Discard the unwind protect closing S. */
3311 specpdl_ptr
= specpdl
+ count1
;
3316 if (xerrno
== EINTR
)
3323 #ifdef DATAGRAM_SOCKETS
3324 if (socktype
== SOCK_DGRAM
)
3326 if (datagram_address
[s
].sa
)
3328 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3329 datagram_address
[s
].len
= lres
->ai_addrlen
;
3333 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3334 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3337 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3338 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3339 conv_lisp_to_sockaddr (rfamily
, remote
,
3340 datagram_address
[s
].sa
, rlen
);
3344 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3347 contact
= Fplist_put (contact
, QCaddress
,
3348 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3349 #ifdef HAVE_GETSOCKNAME
3352 struct sockaddr_in sa1
;
3353 socklen_t len1
= sizeof (sa1
);
3354 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3355 contact
= Fplist_put (contact
, QClocal
,
3356 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3363 #ifdef HAVE_GETADDRINFO
3372 /* Discard the unwind protect for closing S, if any. */
3373 specpdl_ptr
= specpdl
+ count1
;
3375 /* Unwind bind_polling_period and request_sigio. */
3376 unbind_to (count
, Qnil
);
3380 /* If non-blocking got this far - and failed - assume non-blocking is
3381 not supported after all. This is probably a wrong assumption, but
3382 the normal blocking calls to open-network-stream handles this error
3384 if (is_non_blocking_client
)
3389 report_file_error ("make server process failed", contact
);
3391 report_file_error ("make client process failed", contact
);
3398 buffer
= Fget_buffer_create (buffer
);
3399 proc
= make_process (name
);
3401 chan_process
[inch
] = proc
;
3404 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3407 fcntl (inch
, F_SETFL
, O_NDELAY
);
3411 p
= XPROCESS (proc
);
3413 p
->childp
= contact
;
3414 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3418 p
->sentinel
= sentinel
;
3420 p
->log
= Fplist_get (contact
, QClog
);
3421 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3422 p
->kill_without_query
= 1;
3423 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3428 if (is_server
&& socktype
!= SOCK_DGRAM
)
3429 p
->status
= Qlisten
;
3431 /* Make the process marker point into the process buffer (if any). */
3432 if (BUFFERP (buffer
))
3433 set_marker_both (p
->mark
, buffer
,
3434 BUF_ZV (XBUFFER (buffer
)),
3435 BUF_ZV_BYTE (XBUFFER (buffer
)));
3437 #ifdef NON_BLOCKING_CONNECT
3438 if (is_non_blocking_client
)
3440 /* We may get here if connect did succeed immediately. However,
3441 in that case, we still need to signal this like a non-blocking
3443 p
->status
= Qconnect
;
3444 if (!FD_ISSET (inch
, &connect_wait_mask
))
3446 FD_SET (inch
, &connect_wait_mask
);
3447 FD_SET (inch
, &write_mask
);
3448 num_pending_connects
++;
3453 /* A server may have a client filter setting of Qt, but it must
3454 still listen for incoming connects unless it is stopped. */
3455 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3456 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3458 FD_SET (inch
, &input_wait_mask
);
3459 FD_SET (inch
, &non_keyboard_wait_mask
);
3462 if (inch
> max_process_desc
)
3463 max_process_desc
= inch
;
3465 tem
= Fplist_member (contact
, QCcoding
);
3466 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3467 tem
= Qnil
; /* No error message (too late!). */
3470 /* Setup coding systems for communicating with the network stream. */
3471 struct gcpro inner_gcpro1
;
3472 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3473 Lisp_Object coding_systems
= Qt
;
3474 Lisp_Object fargs
[5], val
;
3478 val
= XCAR (XCDR (tem
));
3482 else if (!NILP (Vcoding_system_for_read
))
3483 val
= Vcoding_system_for_read
;
3484 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3485 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3486 /* We dare not decode end-of-line format by setting VAL to
3487 Qraw_text, because the existing Emacs Lisp libraries
3488 assume that they receive bare code including a sequene of
3493 if (NILP (host
) || NILP (service
))
3494 coding_systems
= Qnil
;
3497 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3498 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3499 GCPRO1_VAR (proc
, inner_gcpro
);
3500 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3501 UNGCPRO_VAR (inner_gcpro
);
3503 if (CONSP (coding_systems
))
3504 val
= XCAR (coding_systems
);
3505 else if (CONSP (Vdefault_process_coding_system
))
3506 val
= XCAR (Vdefault_process_coding_system
);
3510 p
->decode_coding_system
= val
;
3514 val
= XCAR (XCDR (tem
));
3518 else if (!NILP (Vcoding_system_for_write
))
3519 val
= Vcoding_system_for_write
;
3520 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3524 if (EQ (coding_systems
, Qt
))
3526 if (NILP (host
) || NILP (service
))
3527 coding_systems
= Qnil
;
3530 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3531 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3532 GCPRO1_VAR (proc
, inner_gcpro
);
3533 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3534 UNGCPRO_VAR (inner_gcpro
);
3537 if (CONSP (coding_systems
))
3538 val
= XCDR (coding_systems
);
3539 else if (CONSP (Vdefault_process_coding_system
))
3540 val
= XCDR (Vdefault_process_coding_system
);
3544 p
->encode_coding_system
= val
;
3546 setup_process_coding_systems (proc
);
3548 p
->decoding_buf
= empty_unibyte_string
;
3549 p
->decoding_carryover
= 0;
3550 p
->encoding_buf
= empty_unibyte_string
;
3552 p
->inherit_coding_system_flag
3553 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3560 #if defined(HAVE_NET_IF_H)
3563 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3564 doc
: /* Return an alist of all network interfaces and their network address.
3565 Each element is a cons, the car of which is a string containing the
3566 interface name, and the cdr is the network address in internal
3567 format; see the description of ADDRESS in `make-network-process'. */)
3570 struct ifconf ifconf
;
3571 struct ifreq
*ifreq
;
3573 ptrdiff_t buf_size
= 512;
3577 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3583 buf
= xpalloc (buf
, &buf_size
, sizeof *ifreq
, INT_MAX
, 1);
3584 ifconf
.ifc_buf
= buf
;
3585 ifconf
.ifc_len
= buf_size
;
3586 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3593 if (ifconf
.ifc_len
== buf_size
)
3599 for (ifreq
= ifconf
.ifc_req
;
3600 (char *) ifreq
< (char *) (ifconf
.ifc_req
) + ifconf
.ifc_len
;
3603 struct ifreq
*ifq
= ifreq
;
3604 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3605 #define SIZEOF_IFREQ(sif) \
3606 ((sif)->ifr_addr.sa_len < sizeof(struct sockaddr) ? \
3607 sizeof((*sif)) : sizeof ((sif)->ifr_name) + sif->ifr_addr.sa_len)
3609 int len
= SIZEOF_IFREQ (ifq
);
3611 int len
= sizeof (*ifreq
);
3613 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3615 ifreq
= (struct ifreq
*) ((char*) ifreq
+ len
);
3617 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3620 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3621 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3622 res
= Fcons (Fcons (build_string (namebuf
),
3623 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3624 sizeof (struct sockaddr
))),
3631 #endif /* SIOCGIFCONF */
3633 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3637 const char *flag_sym
;
3640 static const struct ifflag_def ifflag_table
[] = {
3644 #ifdef IFF_BROADCAST
3645 { IFF_BROADCAST
, "broadcast" },
3648 { IFF_DEBUG
, "debug" },
3651 { IFF_LOOPBACK
, "loopback" },
3653 #ifdef IFF_POINTOPOINT
3654 { IFF_POINTOPOINT
, "pointopoint" },
3657 { IFF_RUNNING
, "running" },
3660 { IFF_NOARP
, "noarp" },
3663 { IFF_PROMISC
, "promisc" },
3665 #ifdef IFF_NOTRAILERS
3666 #ifdef NS_IMPL_COCOA
3667 /* Really means smart, notrailers is obsolete */
3668 { IFF_NOTRAILERS
, "smart" },
3670 { IFF_NOTRAILERS
, "notrailers" },
3674 { IFF_ALLMULTI
, "allmulti" },
3677 { IFF_MASTER
, "master" },
3680 { IFF_SLAVE
, "slave" },
3682 #ifdef IFF_MULTICAST
3683 { IFF_MULTICAST
, "multicast" },
3686 { IFF_PORTSEL
, "portsel" },
3688 #ifdef IFF_AUTOMEDIA
3689 { IFF_AUTOMEDIA
, "automedia" },
3692 { IFF_DYNAMIC
, "dynamic" },
3695 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3698 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3701 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3704 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3707 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3712 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3713 doc
: /* Return information about network interface named IFNAME.
3714 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3715 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3716 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3717 FLAGS is the current flags of the interface. */)
3718 (Lisp_Object ifname
)
3721 Lisp_Object res
= Qnil
;
3725 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3726 && defined HAVE_GETIFADDRS && defined LLADDR)
3727 struct ifaddrs
*ifap
;
3730 CHECK_STRING (ifname
);
3732 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3733 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3735 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3740 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3741 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3743 int flags
= rq
.ifr_flags
;
3744 const struct ifflag_def
*fp
;
3747 /* If flags is smaller than int (i.e. short) it may have the high bit set
3748 due to IFF_MULTICAST. In that case, sign extending it into
3750 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3751 flags
= (unsigned short) rq
.ifr_flags
;
3754 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3756 if (flags
& fp
->flag_bit
)
3758 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3759 flags
-= fp
->flag_bit
;
3762 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3766 elt
= Fcons (make_number (fnum
), elt
);
3771 res
= Fcons (elt
, res
);
3774 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3775 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3777 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3778 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3782 for (n
= 0; n
< 6; n
++)
3783 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3784 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3786 #elif defined(HAVE_GETIFADDRS) && defined(LLADDR)
3787 if (getifaddrs (&ifap
) != -1)
3789 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3790 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3793 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3795 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3796 unsigned char linkaddr
[6];
3799 if (it
->ifa_addr
->sa_family
!= AF_LINK
3800 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3801 || sdl
->sdl_alen
!= 6)
3804 memcpy (linkaddr
, LLADDR(sdl
), sdl
->sdl_alen
);
3805 for (n
= 0; n
< 6; n
++)
3806 p
->contents
[n
] = make_number (linkaddr
[n
]);
3808 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3812 #ifdef HAVE_FREEIFADDRS
3816 #endif /* HAVE_GETIFADDRS && LLADDR */
3818 res
= Fcons (elt
, res
);
3821 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3822 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3825 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3826 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3828 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3832 res
= Fcons (elt
, res
);
3835 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3836 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3839 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3842 res
= Fcons (elt
, res
);
3845 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3846 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3849 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3852 res
= Fcons (elt
, res
);
3856 return any
? res
: Qnil
;
3859 #endif /* defined(HAVE_NET_IF_H) */
3861 /* Turn off input and output for process PROC. */
3864 deactivate_process (Lisp_Object proc
)
3866 register int inchannel
, outchannel
;
3867 register struct Lisp_Process
*p
= XPROCESS (proc
);
3869 inchannel
= p
->infd
;
3870 outchannel
= p
->outfd
;
3872 #ifdef ADAPTIVE_READ_BUFFERING
3873 if (p
->read_output_delay
> 0)
3875 if (--process_output_delay_count
< 0)
3876 process_output_delay_count
= 0;
3877 p
->read_output_delay
= 0;
3878 p
->read_output_skip
= 0;
3884 /* Beware SIGCHLD hereabouts. */
3885 flush_pending_output (inchannel
);
3886 emacs_close (inchannel
);
3887 if (outchannel
>= 0 && outchannel
!= inchannel
)
3888 emacs_close (outchannel
);
3892 #ifdef DATAGRAM_SOCKETS
3893 if (DATAGRAM_CHAN_P (inchannel
))
3895 xfree (datagram_address
[inchannel
].sa
);
3896 datagram_address
[inchannel
].sa
= 0;
3897 datagram_address
[inchannel
].len
= 0;
3900 chan_process
[inchannel
] = Qnil
;
3901 FD_CLR (inchannel
, &input_wait_mask
);
3902 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3903 #ifdef NON_BLOCKING_CONNECT
3904 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3906 FD_CLR (inchannel
, &connect_wait_mask
);
3907 FD_CLR (inchannel
, &write_mask
);
3908 if (--num_pending_connects
< 0)
3912 if (inchannel
== max_process_desc
)
3915 /* We just closed the highest-numbered process input descriptor,
3916 so recompute the highest-numbered one now. */
3917 max_process_desc
= 0;
3918 for (i
= 0; i
< MAXDESC
; i
++)
3919 if (!NILP (chan_process
[i
]))
3920 max_process_desc
= i
;
3926 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3928 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3929 It is read into the process' buffers or given to their filter functions.
3930 Non-nil arg PROCESS means do not return until some output has been received
3933 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3934 and milliseconds to wait; return after that much time whether or not
3935 there is any subprocess output. If SECONDS is a floating point number,
3936 it specifies a fractional number of seconds to wait.
3937 The MILLISEC argument is obsolete and should be avoided.
3939 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3940 from PROCESS, suspending reading output from other processes.
3941 If JUST-THIS-ONE is an integer, don't run any timers either.
3942 Return non-nil if we received any output before the timeout expired. */)
3943 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3945 int secs
, usecs
= 0;
3947 if (! NILP (process
))
3948 CHECK_PROCESS (process
);
3950 just_this_one
= Qnil
;
3952 if (!NILP (millisec
))
3953 { /* Obsolete calling convention using integers rather than floats. */
3954 CHECK_NUMBER (millisec
);
3956 seconds
= make_float (XINT (millisec
) / 1000.0);
3959 CHECK_NUMBER (seconds
);
3960 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3964 if (!NILP (seconds
))
3966 if (INTEGERP (seconds
))
3967 secs
= XINT (seconds
);
3968 else if (FLOATP (seconds
))
3970 double timeout
= XFLOAT_DATA (seconds
);
3971 secs
= (int) timeout
;
3972 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3975 wrong_type_argument (Qnumberp
, seconds
);
3977 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3978 secs
= -1, usecs
= 0;
3981 secs
= NILP (process
) ? -1 : 0;
3984 (wait_reading_process_output (secs
, usecs
, 0, 0,
3986 !NILP (process
) ? XPROCESS (process
) : NULL
,
3987 NILP (just_this_one
) ? 0 :
3988 !INTEGERP (just_this_one
) ? 1 : -1)
3992 /* Accept a connection for server process SERVER on CHANNEL. */
3994 static int connect_counter
= 0;
3997 server_accept_connection (Lisp_Object server
, int channel
)
3999 Lisp_Object proc
, caller
, name
, buffer
;
4000 Lisp_Object contact
, host
, service
;
4001 struct Lisp_Process
*ps
= XPROCESS (server
);
4002 struct Lisp_Process
*p
;
4006 struct sockaddr_in in
;
4008 struct sockaddr_in6 in6
;
4010 #ifdef HAVE_LOCAL_SOCKETS
4011 struct sockaddr_un un
;
4014 socklen_t len
= sizeof saddr
;
4016 s
= accept (channel
, &saddr
.sa
, &len
);
4025 if (code
== EWOULDBLOCK
)
4029 if (!NILP (ps
->log
))
4030 call3 (ps
->log
, server
, Qnil
,
4031 concat3 (build_string ("accept failed with code"),
4032 Fnumber_to_string (make_number (code
)),
4033 build_string ("\n")));
4039 /* Setup a new process to handle the connection. */
4041 /* Generate a unique identification of the caller, and build contact
4042 information for this process. */
4045 switch (saddr
.sa
.sa_family
)
4049 Lisp_Object args
[5];
4050 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4051 args
[0] = build_string ("%d.%d.%d.%d");
4052 args
[1] = make_number (*ip
++);
4053 args
[2] = make_number (*ip
++);
4054 args
[3] = make_number (*ip
++);
4055 args
[4] = make_number (*ip
++);
4056 host
= Fformat (5, args
);
4057 service
= make_number (ntohs (saddr
.in
.sin_port
));
4059 args
[0] = build_string (" <%s:%d>");
4062 caller
= Fformat (3, args
);
4069 Lisp_Object args
[9];
4070 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4072 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4073 for (i
= 0; i
< 8; i
++)
4074 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4075 host
= Fformat (9, args
);
4076 service
= make_number (ntohs (saddr
.in
.sin_port
));
4078 args
[0] = build_string (" <[%s]:%d>");
4081 caller
= Fformat (3, args
);
4086 #ifdef HAVE_LOCAL_SOCKETS
4090 caller
= Fnumber_to_string (make_number (connect_counter
));
4091 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4095 /* Create a new buffer name for this process if it doesn't have a
4096 filter. The new buffer name is based on the buffer name or
4097 process name of the server process concatenated with the caller
4100 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4104 buffer
= ps
->buffer
;
4106 buffer
= Fbuffer_name (buffer
);
4111 buffer
= concat2 (buffer
, caller
);
4112 buffer
= Fget_buffer_create (buffer
);
4116 /* Generate a unique name for the new server process. Combine the
4117 server process name with the caller identification. */
4119 name
= concat2 (ps
->name
, caller
);
4120 proc
= make_process (name
);
4122 chan_process
[s
] = proc
;
4125 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4128 fcntl (s
, F_SETFL
, O_NDELAY
);
4132 p
= XPROCESS (proc
);
4134 /* Build new contact information for this setup. */
4135 contact
= Fcopy_sequence (ps
->childp
);
4136 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4137 contact
= Fplist_put (contact
, QChost
, host
);
4138 if (!NILP (service
))
4139 contact
= Fplist_put (contact
, QCservice
, service
);
4140 contact
= Fplist_put (contact
, QCremote
,
4141 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4142 #ifdef HAVE_GETSOCKNAME
4144 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4145 contact
= Fplist_put (contact
, QClocal
,
4146 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4149 p
->childp
= contact
;
4150 p
->plist
= Fcopy_sequence (ps
->plist
);
4154 p
->sentinel
= ps
->sentinel
;
4155 p
->filter
= ps
->filter
;
4162 /* Client processes for accepted connections are not stopped initially. */
4163 if (!EQ (p
->filter
, Qt
))
4165 FD_SET (s
, &input_wait_mask
);
4166 FD_SET (s
, &non_keyboard_wait_mask
);
4169 if (s
> max_process_desc
)
4170 max_process_desc
= s
;
4172 /* Setup coding system for new process based on server process.
4173 This seems to be the proper thing to do, as the coding system
4174 of the new process should reflect the settings at the time the
4175 server socket was opened; not the current settings. */
4177 p
->decode_coding_system
= ps
->decode_coding_system
;
4178 p
->encode_coding_system
= ps
->encode_coding_system
;
4179 setup_process_coding_systems (proc
);
4181 p
->decoding_buf
= empty_unibyte_string
;
4182 p
->decoding_carryover
= 0;
4183 p
->encoding_buf
= empty_unibyte_string
;
4185 p
->inherit_coding_system_flag
4186 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4188 if (!NILP (ps
->log
))
4189 call3 (ps
->log
, server
, proc
,
4190 concat3 (build_string ("accept from "),
4191 (STRINGP (host
) ? host
: build_string ("-")),
4192 build_string ("\n")));
4194 if (!NILP (p
->sentinel
))
4195 exec_sentinel (proc
,
4196 concat3 (build_string ("open from "),
4197 (STRINGP (host
) ? host
: build_string ("-")),
4198 build_string ("\n")));
4201 /* This variable is different from waiting_for_input in keyboard.c.
4202 It is used to communicate to a lisp process-filter/sentinel (via the
4203 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4204 for user-input when that process-filter was called.
4205 waiting_for_input cannot be used as that is by definition 0 when
4206 lisp code is being evalled.
4207 This is also used in record_asynch_buffer_change.
4208 For that purpose, this must be 0
4209 when not inside wait_reading_process_output. */
4210 static int waiting_for_user_input_p
;
4213 wait_reading_process_output_unwind (Lisp_Object data
)
4215 waiting_for_user_input_p
= XINT (data
);
4219 /* This is here so breakpoints can be put on it. */
4221 wait_reading_process_output_1 (void)
4225 /* Use a wrapper around select to work around a bug in gdb 5.3.
4226 Normally, the wrapper is optimized away by inlining.
4228 If emacs is stopped inside select, the gdb backtrace doesn't
4229 show the function which called select, so it is practically
4230 impossible to step through wait_reading_process_output. */
4234 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4236 return select (n
, rfd
, wfd
, xfd
, tmo
);
4238 #define select select_wrapper
4241 /* Read and dispose of subprocess output while waiting for timeout to
4242 elapse and/or keyboard input to be available.
4245 timeout in seconds, or
4246 zero for no limit, or
4247 -1 means gobble data immediately available but don't wait for any.
4250 an additional duration to wait, measured in microseconds.
4251 If this is nonzero and time_limit is 0, then the timeout
4252 consists of MICROSECS only.
4254 READ_KBD is a lisp value:
4255 0 to ignore keyboard input, or
4256 1 to return when input is available, or
4257 -1 meaning caller will actually read the input, so don't throw to
4258 the quit handler, or
4260 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4261 output that arrives.
4263 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4264 (and gobble terminal input into the buffer if any arrives).
4266 If WAIT_PROC is specified, wait until something arrives from that
4267 process. The return value is true if we read some input from
4270 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4271 (suspending output from other processes). A negative value
4272 means don't run any timers either.
4274 If WAIT_PROC is specified, then the function returns true if we
4275 received input from that process before the timeout elapsed.
4276 Otherwise, return true if we received input from any process. */
4279 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4281 Lisp_Object wait_for_cell
,
4282 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4284 register int channel
, nfds
;
4285 SELECT_TYPE Available
;
4286 SELECT_TYPE Writeok
;
4288 int check_delay
, no_avail
;
4291 EMACS_TIME timeout
, end_time
;
4292 int wait_channel
= -1;
4293 int got_some_input
= 0;
4294 int count
= SPECPDL_INDEX ();
4296 FD_ZERO (&Available
);
4299 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4300 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4301 message ("Blocking call to accept-process-output with quit inhibited!!");
4303 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4304 if (wait_proc
!= NULL
)
4305 wait_channel
= wait_proc
->infd
;
4307 record_unwind_protect (wait_reading_process_output_unwind
,
4308 make_number (waiting_for_user_input_p
));
4309 waiting_for_user_input_p
= read_kbd
;
4311 /* Since we may need to wait several times,
4312 compute the absolute time to return at. */
4313 if (time_limit
|| microsecs
)
4315 EMACS_GET_TIME (end_time
);
4316 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4317 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4322 int timeout_reduced_for_timers
= 0;
4324 /* If calling from keyboard input, do not quit
4325 since we want to return C-g as an input character.
4326 Otherwise, do pending quit if requested. */
4331 process_pending_signals ();
4334 /* Exit now if the cell we're waiting for became non-nil. */
4335 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4338 /* Compute time from now till when time limit is up */
4339 /* Exit if already run out */
4340 if (time_limit
== -1)
4342 /* -1 specified for timeout means
4343 gobble output available now
4344 but don't wait at all. */
4346 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4348 else if (time_limit
|| microsecs
)
4350 EMACS_GET_TIME (timeout
);
4351 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4352 if (EMACS_TIME_NEG_P (timeout
))
4357 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4360 /* Normally we run timers here.
4361 But not if wait_for_cell; in those cases,
4362 the wait is supposed to be short,
4363 and those callers cannot handle running arbitrary Lisp code here. */
4364 if (NILP (wait_for_cell
)
4365 && just_wait_proc
>= 0)
4367 EMACS_TIME timer_delay
;
4371 int old_timers_run
= timers_run
;
4372 struct buffer
*old_buffer
= current_buffer
;
4373 Lisp_Object old_window
= selected_window
;
4375 timer_delay
= timer_check ();
4377 /* If a timer has run, this might have changed buffers
4378 an alike. Make read_key_sequence aware of that. */
4379 if (timers_run
!= old_timers_run
4380 && (old_buffer
!= current_buffer
4381 || !EQ (old_window
, selected_window
))
4382 && waiting_for_user_input_p
== -1)
4383 record_asynch_buffer_change ();
4385 if (timers_run
!= old_timers_run
&& do_display
)
4386 /* We must retry, since a timer may have requeued itself
4387 and that could alter the time_delay. */
4388 redisplay_preserve_echo_area (9);
4392 while (!detect_input_pending ());
4394 /* If there is unread keyboard input, also return. */
4396 && requeued_events_pending_p ())
4399 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4401 EMACS_TIME difference
;
4402 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4403 if (EMACS_TIME_NEG_P (difference
))
4405 timeout
= timer_delay
;
4406 timeout_reduced_for_timers
= 1;
4409 /* If time_limit is -1, we are not going to wait at all. */
4410 else if (time_limit
!= -1)
4412 /* This is so a breakpoint can be put here. */
4413 wait_reading_process_output_1 ();
4417 /* Cause C-g and alarm signals to take immediate action,
4418 and cause input available signals to zero out timeout.
4420 It is important that we do this before checking for process
4421 activity. If we get a SIGCHLD after the explicit checks for
4422 process activity, timeout is the only way we will know. */
4424 set_waiting_for_input (&timeout
);
4426 /* If status of something has changed, and no input is
4427 available, notify the user of the change right away. After
4428 this explicit check, we'll let the SIGCHLD handler zap
4429 timeout to get our attention. */
4430 if (update_tick
!= process_tick
)
4435 if (kbd_on_hold_p ())
4438 Atemp
= input_wait_mask
;
4441 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4442 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4444 #ifdef NON_BLOCKING_CONNECT
4445 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4449 (SELECT_TYPE
*)0, &timeout
)
4452 /* It's okay for us to do this and then continue with
4453 the loop, since timeout has already been zeroed out. */
4454 clear_waiting_for_input ();
4455 status_notify (NULL
);
4456 if (do_display
) redisplay_preserve_echo_area (13);
4460 /* Don't wait for output from a non-running process. Just
4461 read whatever data has already been received. */
4462 if (wait_proc
&& wait_proc
->raw_status_new
)
4463 update_status (wait_proc
);
4465 && ! EQ (wait_proc
->status
, Qrun
)
4466 && ! EQ (wait_proc
->status
, Qconnect
))
4468 int nread
, total_nread
= 0;
4470 clear_waiting_for_input ();
4471 XSETPROCESS (proc
, wait_proc
);
4473 /* Read data from the process, until we exhaust it. */
4474 while (wait_proc
->infd
>= 0)
4476 nread
= read_process_output (proc
, wait_proc
->infd
);
4483 total_nread
+= nread
;
4487 else if (nread
== -1 && EIO
== errno
)
4491 else if (nread
== -1 && EAGAIN
== errno
)
4495 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4499 if (total_nread
> 0 && do_display
)
4500 redisplay_preserve_echo_area (10);
4505 /* Wait till there is something to do */
4507 if (wait_proc
&& just_wait_proc
)
4509 if (wait_proc
->infd
< 0) /* Terminated */
4511 FD_SET (wait_proc
->infd
, &Available
);
4515 else if (!NILP (wait_for_cell
))
4517 Available
= non_process_wait_mask
;
4524 Available
= non_keyboard_wait_mask
;
4526 Available
= input_wait_mask
;
4527 Writeok
= write_mask
;
4528 #ifdef SELECT_CANT_DO_WRITE_MASK
4533 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4536 /* If frame size has changed or the window is newly mapped,
4537 redisplay now, before we start to wait. There is a race
4538 condition here; if a SIGIO arrives between now and the select
4539 and indicates that a frame is trashed, the select may block
4540 displaying a trashed screen. */
4541 if (frame_garbaged
&& do_display
)
4543 clear_waiting_for_input ();
4544 redisplay_preserve_echo_area (11);
4546 set_waiting_for_input (&timeout
);
4549 /* Skip the `select' call if input is available and we're
4550 waiting for keyboard input or a cell change (which can be
4551 triggered by processing X events). In the latter case, set
4552 nfds to 1 to avoid breaking the loop. */
4554 if ((read_kbd
|| !NILP (wait_for_cell
))
4555 && detect_input_pending ())
4557 nfds
= read_kbd
? 0 : 1;
4564 #ifdef ADAPTIVE_READ_BUFFERING
4565 /* Set the timeout for adaptive read buffering if any
4566 process has non-zero read_output_skip and non-zero
4567 read_output_delay, and we are not reading output for a
4568 specific wait_channel. It is not executed if
4569 Vprocess_adaptive_read_buffering is nil. */
4570 if (process_output_skip
&& check_delay
> 0)
4572 int usecs
= EMACS_USECS (timeout
);
4573 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4574 usecs
= READ_OUTPUT_DELAY_MAX
;
4575 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4577 proc
= chan_process
[channel
];
4580 /* Find minimum non-zero read_output_delay among the
4581 processes with non-zero read_output_skip. */
4582 if (XPROCESS (proc
)->read_output_delay
> 0)
4585 if (!XPROCESS (proc
)->read_output_skip
)
4587 FD_CLR (channel
, &Available
);
4588 XPROCESS (proc
)->read_output_skip
= 0;
4589 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4590 usecs
= XPROCESS (proc
)->read_output_delay
;
4593 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4594 process_output_skip
= 0;
4597 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4599 #elif defined (HAVE_NS)
4604 (max (max_process_desc
, max_input_desc
) + 1,
4606 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4607 (SELECT_TYPE
*)0, &timeout
);
4610 /* GnuTLS buffers data internally. In lowat mode it leaves
4611 some data in the TCP buffers so that select works, but
4612 with custom pull/push functions we need to check if some
4613 data is available in the buffers manually. */
4615 wait_proc
&& wait_proc
->gnutls_p
/* Check for valid process. */
4616 /* Do we have pending data? */
4617 && emacs_gnutls_record_check_pending (wait_proc
->gnutls_state
) > 0)
4620 /* Set to Available. */
4621 FD_SET (wait_proc
->infd
, &Available
);
4628 /* Make C-g and alarm signals set flags again */
4629 clear_waiting_for_input ();
4631 /* If we woke up due to SIGWINCH, actually change size now. */
4632 do_pending_window_change (0);
4634 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4635 /* We wanted the full specified time, so return now. */
4639 if (xerrno
== EINTR
)
4641 else if (xerrno
== EBADF
)
4644 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4645 the child's closure of the pts gives the parent a SIGHUP, and
4646 the ptc file descriptor is automatically closed,
4647 yielding EBADF here or at select() call above.
4648 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4649 in m/ibmrt-aix.h), and here we just ignore the select error.
4650 Cleanup occurs c/o status_notify after SIGCLD. */
4651 no_avail
= 1; /* Cannot depend on values returned */
4657 error ("select error: %s", emacs_strerror (xerrno
));
4662 FD_ZERO (&Available
);
4666 #if 0 /* When polling is used, interrupt_input is 0,
4667 so get_input_pending should read the input.
4668 So this should not be needed. */
4669 /* If we are using polling for input,
4670 and we see input available, make it get read now.
4671 Otherwise it might not actually get read for a second.
4672 And on hpux, since we turn off polling in wait_reading_process_output,
4673 it might never get read at all if we don't spend much time
4674 outside of wait_reading_process_output. */
4675 if (read_kbd
&& interrupt_input
4676 && keyboard_bit_set (&Available
)
4677 && input_polling_used ())
4678 kill (getpid (), SIGALRM
);
4681 /* Check for keyboard input */
4682 /* If there is any, return immediately
4683 to give it higher priority than subprocesses */
4687 int old_timers_run
= timers_run
;
4688 struct buffer
*old_buffer
= current_buffer
;
4689 Lisp_Object old_window
= selected_window
;
4692 if (detect_input_pending_run_timers (do_display
))
4694 swallow_events (do_display
);
4695 if (detect_input_pending_run_timers (do_display
))
4699 /* If a timer has run, this might have changed buffers
4700 an alike. Make read_key_sequence aware of that. */
4701 if (timers_run
!= old_timers_run
4702 && waiting_for_user_input_p
== -1
4703 && (old_buffer
!= current_buffer
4704 || !EQ (old_window
, selected_window
)))
4705 record_asynch_buffer_change ();
4711 /* If there is unread keyboard input, also return. */
4713 && requeued_events_pending_p ())
4716 /* If we are not checking for keyboard input now,
4717 do process events (but don't run any timers).
4718 This is so that X events will be processed.
4719 Otherwise they may have to wait until polling takes place.
4720 That would causes delays in pasting selections, for example.
4722 (We used to do this only if wait_for_cell.) */
4723 if (read_kbd
== 0 && detect_input_pending ())
4725 swallow_events (do_display
);
4726 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4727 if (detect_input_pending ())
4732 /* Exit now if the cell we're waiting for became non-nil. */
4733 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4737 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4738 go read it. This can happen with X on BSD after logging out.
4739 In that case, there really is no input and no SIGIO,
4740 but select says there is input. */
4742 if (read_kbd
&& interrupt_input
4743 && keyboard_bit_set (&Available
) && ! noninteractive
)
4744 kill (getpid (), SIGIO
);
4748 got_some_input
|= nfds
> 0;
4750 /* If checking input just got us a size-change event from X,
4751 obey it now if we should. */
4752 if (read_kbd
|| ! NILP (wait_for_cell
))
4753 do_pending_window_change (0);
4755 /* Check for data from a process. */
4756 if (no_avail
|| nfds
== 0)
4759 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4761 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4762 if (FD_ISSET (channel
, &Available
)
4764 && (d
->condition
& FOR_READ
) != 0)
4765 d
->func (channel
, d
->data
, 1);
4766 if (FD_ISSET (channel
, &write_mask
)
4768 && (d
->condition
& FOR_WRITE
) != 0)
4769 d
->func (channel
, d
->data
, 0);
4772 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4774 if (FD_ISSET (channel
, &Available
)
4775 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4776 && !FD_ISSET (channel
, &non_process_wait_mask
))
4780 /* If waiting for this channel, arrange to return as
4781 soon as no more input to be processed. No more
4783 if (wait_channel
== channel
)
4789 proc
= chan_process
[channel
];
4793 /* If this is a server stream socket, accept connection. */
4794 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4796 server_accept_connection (proc
, channel
);
4800 /* Read data from the process, starting with our
4801 buffered-ahead character if we have one. */
4803 nread
= read_process_output (proc
, channel
);
4806 /* Since read_process_output can run a filter,
4807 which can call accept-process-output,
4808 don't try to read from any other processes
4809 before doing the select again. */
4810 FD_ZERO (&Available
);
4813 redisplay_preserve_echo_area (12);
4816 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4819 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4820 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4822 else if (nread
== -1 && errno
== EAGAIN
)
4826 else if (nread
== -1 && errno
== EAGAIN
)
4828 /* Note that we cannot distinguish between no input
4829 available now and a closed pipe.
4830 With luck, a closed pipe will be accompanied by
4831 subprocess termination and SIGCHLD. */
4832 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4834 #endif /* O_NDELAY */
4835 #endif /* O_NONBLOCK */
4837 /* On some OSs with ptys, when the process on one end of
4838 a pty exits, the other end gets an error reading with
4839 errno = EIO instead of getting an EOF (0 bytes read).
4840 Therefore, if we get an error reading and errno =
4841 EIO, just continue, because the child process has
4842 exited and should clean itself up soon (e.g. when we
4845 However, it has been known to happen that the SIGCHLD
4846 got lost. So raise the signal again just in case.
4848 else if (nread
== -1 && errno
== EIO
)
4850 /* Clear the descriptor now, so we only raise the
4851 signal once. Don't do this if `process' is only
4853 if (XPROCESS (proc
)->pid
!= -2)
4855 FD_CLR (channel
, &input_wait_mask
);
4856 FD_CLR (channel
, &non_keyboard_wait_mask
);
4858 kill (getpid (), SIGCHLD
);
4861 #endif /* HAVE_PTYS */
4862 /* If we can detect process termination, don't consider the process
4863 gone just because its pipe is closed. */
4865 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4870 /* Preserve status of processes already terminated. */
4871 XPROCESS (proc
)->tick
= ++process_tick
;
4872 deactivate_process (proc
);
4873 if (XPROCESS (proc
)->raw_status_new
)
4874 update_status (XPROCESS (proc
));
4875 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4876 XPROCESS (proc
)->status
4877 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4880 #ifdef NON_BLOCKING_CONNECT
4881 if (FD_ISSET (channel
, &Writeok
)
4882 && FD_ISSET (channel
, &connect_wait_mask
))
4884 struct Lisp_Process
*p
;
4886 FD_CLR (channel
, &connect_wait_mask
);
4887 FD_CLR (channel
, &write_mask
);
4888 if (--num_pending_connects
< 0)
4891 proc
= chan_process
[channel
];
4895 p
= XPROCESS (proc
);
4898 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4899 So only use it on systems where it is known to work. */
4901 socklen_t xlen
= sizeof (xerrno
);
4902 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4907 struct sockaddr pname
;
4908 int pnamelen
= sizeof (pname
);
4910 /* If connection failed, getpeername will fail. */
4912 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4914 /* Obtain connect failure code through error slippage. */
4917 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4924 p
->tick
= ++process_tick
;
4925 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4926 deactivate_process (proc
);
4931 /* Execute the sentinel here. If we had relied on
4932 status_notify to do it later, it will read input
4933 from the process before calling the sentinel. */
4934 exec_sentinel (proc
, build_string ("open\n"));
4935 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4937 FD_SET (p
->infd
, &input_wait_mask
);
4938 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4942 #endif /* NON_BLOCKING_CONNECT */
4943 } /* end for each file descriptor */
4944 } /* end while exit conditions not met */
4946 unbind_to (count
, Qnil
);
4948 /* If calling from keyboard input, do not quit
4949 since we want to return C-g as an input character.
4950 Otherwise, do pending quit if requested. */
4953 /* Prevent input_pending from remaining set if we quit. */
4954 clear_input_pending ();
4958 return got_some_input
;
4961 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4964 read_process_output_call (Lisp_Object fun_and_args
)
4966 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4970 read_process_output_error_handler (Lisp_Object error_val
)
4972 cmd_error_internal (error_val
, "error in process filter: ");
4974 update_echo_area ();
4975 Fsleep_for (make_number (2), Qnil
);
4979 /* Read pending output from the process channel,
4980 starting with our buffered-ahead character if we have one.
4981 Yield number of decoded characters read.
4983 This function reads at most 4096 characters.
4984 If you want to read all available subprocess output,
4985 you must call it repeatedly until it returns zero.
4987 The characters read are decoded according to PROC's coding-system
4991 read_process_output (Lisp_Object proc
, register int channel
)
4993 register ssize_t nbytes
;
4995 register Lisp_Object outstream
;
4996 register struct Lisp_Process
*p
= XPROCESS (proc
);
4997 register EMACS_INT opoint
;
4998 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4999 int carryover
= p
->decoding_carryover
;
5001 int count
= SPECPDL_INDEX ();
5002 Lisp_Object odeactivate
;
5004 chars
= (char *) alloca (carryover
+ readmax
);
5006 /* See the comment above. */
5007 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5009 #ifdef DATAGRAM_SOCKETS
5010 /* We have a working select, so proc_buffered_char is always -1. */
5011 if (DATAGRAM_CHAN_P (channel
))
5013 socklen_t len
= datagram_address
[channel
].len
;
5014 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5015 0, datagram_address
[channel
].sa
, &len
);
5020 int buffered
= 0 <= proc_buffered_char
[channel
];
5023 chars
[carryover
] = proc_buffered_char
[channel
];
5024 proc_buffered_char
[channel
] = -1;
5027 if (XPROCESS (proc
)->gnutls_p
)
5028 nbytes
= emacs_gnutls_read (XPROCESS (proc
),
5029 chars
+ carryover
+ buffered
,
5030 readmax
- buffered
);
5033 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5034 readmax
- buffered
);
5035 #ifdef ADAPTIVE_READ_BUFFERING
5036 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5038 int delay
= p
->read_output_delay
;
5041 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5044 process_output_delay_count
++;
5045 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5048 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5050 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5052 process_output_delay_count
--;
5054 p
->read_output_delay
= delay
;
5057 p
->read_output_skip
= 1;
5058 process_output_skip
= 1;
5063 nbytes
+= buffered
&& nbytes
<= 0;
5066 p
->decoding_carryover
= 0;
5068 /* At this point, NBYTES holds number of bytes just received
5069 (including the one in proc_buffered_char[channel]). */
5072 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5074 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5077 /* Now set NBYTES how many bytes we must decode. */
5078 nbytes
+= carryover
;
5080 odeactivate
= Vdeactivate_mark
;
5081 /* There's no good reason to let process filters change the current
5082 buffer, and many callers of accept-process-output, sit-for, and
5083 friends don't expect current-buffer to be changed from under them. */
5084 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5086 /* Read and dispose of the process output. */
5087 outstream
= p
->filter
;
5088 if (!NILP (outstream
))
5091 int outer_running_asynch_code
= running_asynch_code
;
5092 int waiting
= waiting_for_user_input_p
;
5094 /* No need to gcpro these, because all we do with them later
5095 is test them for EQness, and none of them should be a string. */
5097 Lisp_Object obuffer
, okeymap
;
5098 XSETBUFFER (obuffer
, current_buffer
);
5099 okeymap
= BVAR (current_buffer
, keymap
);
5102 /* We inhibit quit here instead of just catching it so that
5103 hitting ^G when a filter happens to be running won't screw
5105 specbind (Qinhibit_quit
, Qt
);
5106 specbind (Qlast_nonmenu_event
, Qt
);
5108 /* In case we get recursively called,
5109 and we already saved the match data nonrecursively,
5110 save the same match data in safely recursive fashion. */
5111 if (outer_running_asynch_code
)
5114 /* Don't clobber the CURRENT match data, either! */
5115 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5116 restore_search_regs ();
5117 record_unwind_save_match_data ();
5118 Fset_match_data (tem
, Qt
);
5121 /* For speed, if a search happens within this code,
5122 save the match data in a special nonrecursive fashion. */
5123 running_asynch_code
= 1;
5125 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5126 text
= coding
->dst_object
;
5127 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5128 /* A new coding system might be found. */
5129 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5131 p
->decode_coding_system
= Vlast_coding_system_used
;
5133 /* Don't call setup_coding_system for
5134 proc_decode_coding_system[channel] here. It is done in
5135 detect_coding called via decode_coding above. */
5137 /* If a coding system for encoding is not yet decided, we set
5138 it as the same as coding-system for decoding.
5140 But, before doing that we must check if
5141 proc_encode_coding_system[p->outfd] surely points to a
5142 valid memory because p->outfd will be changed once EOF is
5143 sent to the process. */
5144 if (NILP (p
->encode_coding_system
)
5145 && proc_encode_coding_system
[p
->outfd
])
5147 p
->encode_coding_system
5148 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5149 setup_coding_system (p
->encode_coding_system
,
5150 proc_encode_coding_system
[p
->outfd
]);
5154 if (coding
->carryover_bytes
> 0)
5156 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5157 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5158 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5159 coding
->carryover_bytes
);
5160 p
->decoding_carryover
= coding
->carryover_bytes
;
5162 if (SBYTES (text
) > 0)
5163 internal_condition_case_1 (read_process_output_call
,
5165 Fcons (proc
, Fcons (text
, Qnil
))),
5166 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5167 read_process_output_error_handler
);
5169 /* If we saved the match data nonrecursively, restore it now. */
5170 restore_search_regs ();
5171 running_asynch_code
= outer_running_asynch_code
;
5173 /* Restore waiting_for_user_input_p as it was
5174 when we were called, in case the filter clobbered it. */
5175 waiting_for_user_input_p
= waiting
;
5177 #if 0 /* Call record_asynch_buffer_change unconditionally,
5178 because we might have changed minor modes or other things
5179 that affect key bindings. */
5180 if (! EQ (Fcurrent_buffer (), obuffer
)
5181 || ! EQ (current_buffer
->keymap
, okeymap
))
5183 /* But do it only if the caller is actually going to read events.
5184 Otherwise there's no need to make him wake up, and it could
5185 cause trouble (for example it would make sit_for return). */
5186 if (waiting_for_user_input_p
== -1)
5187 record_asynch_buffer_change ();
5190 /* If no filter, write into buffer if it isn't dead. */
5191 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5193 Lisp_Object old_read_only
;
5194 EMACS_INT old_begv
, old_zv
;
5195 EMACS_INT old_begv_byte
, old_zv_byte
;
5196 EMACS_INT before
, before_byte
;
5197 EMACS_INT opoint_byte
;
5201 Fset_buffer (p
->buffer
);
5203 opoint_byte
= PT_BYTE
;
5204 old_read_only
= BVAR (current_buffer
, read_only
);
5207 old_begv_byte
= BEGV_BYTE
;
5208 old_zv_byte
= ZV_BYTE
;
5210 BVAR (current_buffer
, read_only
) = Qnil
;
5212 /* Insert new output into buffer
5213 at the current end-of-output marker,
5214 thus preserving logical ordering of input and output. */
5215 if (XMARKER (p
->mark
)->buffer
)
5216 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5217 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5220 SET_PT_BOTH (ZV
, ZV_BYTE
);
5222 before_byte
= PT_BYTE
;
5224 /* If the output marker is outside of the visible region, save
5225 the restriction and widen. */
5226 if (! (BEGV
<= PT
&& PT
<= ZV
))
5229 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5230 text
= coding
->dst_object
;
5231 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5232 /* A new coding system might be found. See the comment in the
5233 similar code in the previous `if' block. */
5234 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5236 p
->decode_coding_system
= Vlast_coding_system_used
;
5237 if (NILP (p
->encode_coding_system
)
5238 && proc_encode_coding_system
[p
->outfd
])
5240 p
->encode_coding_system
5241 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5242 setup_coding_system (p
->encode_coding_system
,
5243 proc_encode_coding_system
[p
->outfd
]);
5246 if (coding
->carryover_bytes
> 0)
5248 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5249 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5250 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5251 coding
->carryover_bytes
);
5252 p
->decoding_carryover
= coding
->carryover_bytes
;
5254 /* Adjust the multibyteness of TEXT to that of the buffer. */
5255 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5256 != ! STRING_MULTIBYTE (text
))
5257 text
= (STRING_MULTIBYTE (text
)
5258 ? Fstring_as_unibyte (text
)
5259 : Fstring_to_multibyte (text
));
5260 /* Insert before markers in case we are inserting where
5261 the buffer's mark is, and the user's next command is Meta-y. */
5262 insert_from_string_before_markers (text
, 0, 0,
5263 SCHARS (text
), SBYTES (text
), 0);
5265 /* Make sure the process marker's position is valid when the
5266 process buffer is changed in the signal_after_change above.
5267 W3 is known to do that. */
5268 if (BUFFERP (p
->buffer
)
5269 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5270 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5272 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5274 update_mode_lines
++;
5276 /* Make sure opoint and the old restrictions
5277 float ahead of any new text just as point would. */
5278 if (opoint
>= before
)
5280 opoint
+= PT
- before
;
5281 opoint_byte
+= PT_BYTE
- before_byte
;
5283 if (old_begv
> before
)
5285 old_begv
+= PT
- before
;
5286 old_begv_byte
+= PT_BYTE
- before_byte
;
5288 if (old_zv
>= before
)
5290 old_zv
+= PT
- before
;
5291 old_zv_byte
+= PT_BYTE
- before_byte
;
5294 /* If the restriction isn't what it should be, set it. */
5295 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5296 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5299 BVAR (current_buffer
, read_only
) = old_read_only
;
5300 SET_PT_BOTH (opoint
, opoint_byte
);
5302 /* Handling the process output should not deactivate the mark. */
5303 Vdeactivate_mark
= odeactivate
;
5305 unbind_to (count
, Qnil
);
5309 /* Sending data to subprocess */
5311 static jmp_buf send_process_frame
;
5312 static Lisp_Object process_sent_to
;
5314 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5315 static void send_process_trap (int) NO_RETURN
;
5319 send_process_trap (int ignore
)
5321 SIGNAL_THREAD_CHECK (SIGPIPE
);
5322 sigunblock (sigmask (SIGPIPE
));
5323 longjmp (send_process_frame
, 1);
5326 /* Send some data to process PROC.
5327 BUF is the beginning of the data; LEN is the number of characters.
5328 OBJECT is the Lisp object that the data comes from. If OBJECT is
5329 nil or t, it means that the data comes from C string.
5331 If OBJECT is not nil, the data is encoded by PROC's coding-system
5332 for encoding before it is sent.
5334 This function can evaluate Lisp code and can garbage collect. */
5337 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5338 volatile EMACS_INT len
, volatile Lisp_Object object
)
5340 /* Use volatile to protect variables from being clobbered by longjmp. */
5341 struct Lisp_Process
*p
= XPROCESS (proc
);
5343 struct coding_system
*coding
;
5344 struct gcpro gcpro1
;
5345 void (*volatile old_sigpipe
) (int);
5349 if (p
->raw_status_new
)
5351 if (! EQ (p
->status
, Qrun
))
5352 error ("Process %s not running", SDATA (p
->name
));
5354 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5356 coding
= proc_encode_coding_system
[p
->outfd
];
5357 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5359 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5360 || (BUFFERP (object
)
5361 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5364 p
->encode_coding_system
5365 = complement_process_encoding_system (p
->encode_coding_system
);
5366 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5368 /* The coding system for encoding was changed to raw-text
5369 because we sent a unibyte text previously. Now we are
5370 sending a multibyte text, thus we must encode it by the
5371 original coding system specified for the current process.
5373 Another reason we comming here is that the coding system
5374 was just complemented and new one was returned by
5375 complement_process_encoding_system. */
5376 setup_coding_system (p
->encode_coding_system
, coding
);
5377 Vlast_coding_system_used
= p
->encode_coding_system
;
5379 coding
->src_multibyte
= 1;
5383 /* For sending a unibyte text, character code conversion should
5384 not take place but EOL conversion should. So, setup raw-text
5385 or one of the subsidiary if we have not yet done it. */
5386 if (CODING_REQUIRE_ENCODING (coding
))
5388 if (CODING_REQUIRE_FLUSHING (coding
))
5390 /* But, before changing the coding, we must flush out data. */
5391 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5392 send_process (proc
, "", 0, Qt
);
5393 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5395 setup_coding_system (raw_text_coding_system
5396 (Vlast_coding_system_used
),
5398 coding
->src_multibyte
= 0;
5401 coding
->dst_multibyte
= 0;
5403 if (CODING_REQUIRE_ENCODING (coding
))
5405 coding
->dst_object
= Qt
;
5406 if (BUFFERP (object
))
5408 EMACS_INT from_byte
, from
, to
;
5409 EMACS_INT save_pt
, save_pt_byte
;
5410 struct buffer
*cur
= current_buffer
;
5412 set_buffer_internal (XBUFFER (object
));
5413 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5415 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5416 from
= BYTE_TO_CHAR (from_byte
);
5417 to
= BYTE_TO_CHAR (from_byte
+ len
);
5418 TEMP_SET_PT_BOTH (from
, from_byte
);
5419 encode_coding_object (coding
, object
, from
, from_byte
,
5420 to
, from_byte
+ len
, Qt
);
5421 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5422 set_buffer_internal (cur
);
5424 else if (STRINGP (object
))
5426 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5427 SBYTES (object
), Qt
);
5431 coding
->dst_object
= make_unibyte_string (buf
, len
);
5432 coding
->produced
= len
;
5435 len
= coding
->produced
;
5436 object
= coding
->dst_object
;
5437 buf
= SSDATA (object
);
5440 if (pty_max_bytes
== 0)
5442 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5443 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5444 if (pty_max_bytes
< 0)
5445 pty_max_bytes
= 250;
5447 pty_max_bytes
= 250;
5449 /* Deduct one, to leave space for the eof. */
5453 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5454 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5455 when returning with longjmp despite being declared volatile. */
5456 if (!setjmp (send_process_frame
))
5458 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5460 process_sent_to
= proc
;
5463 EMACS_INT
this = len
;
5465 /* Send this batch, using one or more write calls. */
5468 EMACS_INT written
= 0;
5469 int outfd
= p
->outfd
;
5470 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5471 #ifdef DATAGRAM_SOCKETS
5472 if (DATAGRAM_CHAN_P (outfd
))
5474 rv
= sendto (outfd
, buf
, this,
5475 0, datagram_address
[outfd
].sa
,
5476 datagram_address
[outfd
].len
);
5479 else if (errno
== EMSGSIZE
)
5481 signal (SIGPIPE
, old_sigpipe
);
5482 report_file_error ("sending datagram",
5483 Fcons (proc
, Qnil
));
5490 if (XPROCESS (proc
)->gnutls_p
)
5491 written
= emacs_gnutls_write (XPROCESS (proc
),
5495 written
= emacs_write (outfd
, buf
, this);
5496 rv
= (written
? 0 : -1);
5497 #ifdef ADAPTIVE_READ_BUFFERING
5498 if (p
->read_output_delay
> 0
5499 && p
->adaptive_read_buffering
== 1)
5501 p
->read_output_delay
= 0;
5502 process_output_delay_count
--;
5503 p
->read_output_skip
= 0;
5507 signal (SIGPIPE
, old_sigpipe
);
5513 || errno
== EWOULDBLOCK
5519 /* Buffer is full. Wait, accepting input;
5520 that may allow the program
5521 to finish doing output and read more. */
5523 EMACS_INT offset
= 0;
5525 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5526 /* A gross hack to work around a bug in FreeBSD.
5527 In the following sequence, read(2) returns
5531 write(2) 954 bytes, get EAGAIN
5532 read(2) 1024 bytes in process_read_output
5533 read(2) 11 bytes in process_read_output
5535 That is, read(2) returns more bytes than have
5536 ever been written successfully. The 1033 bytes
5537 read are the 1022 bytes written successfully
5538 after processing (for example with CRs added if
5539 the terminal is set up that way which it is
5540 here). The same bytes will be seen again in a
5541 later read(2), without the CRs. */
5543 if (errno
== EAGAIN
)
5546 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5548 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5550 /* Running filters might relocate buffers or strings.
5551 Arrange to relocate BUF. */
5552 if (BUFFERP (object
))
5553 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5554 (unsigned char *) buf
);
5555 else if (STRINGP (object
))
5556 offset
= buf
- SSDATA (object
);
5558 #ifdef EMACS_HAS_USECS
5559 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5561 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5564 if (BUFFERP (object
))
5565 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5567 else if (STRINGP (object
))
5568 buf
= offset
+ SSDATA (object
);
5571 /* This is a real error. */
5572 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5582 signal (SIGPIPE
, old_sigpipe
);
5583 proc
= process_sent_to
;
5584 p
= XPROCESS (proc
);
5585 p
->raw_status_new
= 0;
5586 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5587 p
->tick
= ++process_tick
;
5588 deactivate_process (proc
);
5589 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5595 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5597 doc
: /* Send current contents of region as input to PROCESS.
5598 PROCESS may be a process, a buffer, the name of a process or buffer, or
5599 nil, indicating the current buffer's process.
5600 Called from program, takes three arguments, PROCESS, START and END.
5601 If the region is more than 500 characters long,
5602 it is sent in several bunches. This may happen even for shorter regions.
5603 Output from processes can arrive in between bunches. */)
5604 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5607 EMACS_INT start1
, end1
;
5609 proc
= get_process (process
);
5610 validate_region (&start
, &end
);
5612 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5613 move_gap (XINT (start
));
5615 start1
= CHAR_TO_BYTE (XINT (start
));
5616 end1
= CHAR_TO_BYTE (XINT (end
));
5617 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5618 Fcurrent_buffer ());
5623 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5625 doc
: /* Send PROCESS the contents of STRING as input.
5626 PROCESS may be a process, a buffer, the name of a process or buffer, or
5627 nil, indicating the current buffer's process.
5628 If STRING is more than 500 characters long,
5629 it is sent in several bunches. This may happen even for shorter strings.
5630 Output from processes can arrive in between bunches. */)
5631 (Lisp_Object process
, Lisp_Object string
)
5634 CHECK_STRING (string
);
5635 proc
= get_process (process
);
5636 send_process (proc
, SSDATA (string
),
5637 SBYTES (string
), string
);
5641 /* Return the foreground process group for the tty/pty that
5642 the process P uses. */
5644 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5649 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5652 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5653 master side. Try the slave side. */
5654 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5658 ioctl (fd
, TIOCGPGRP
, &gid
);
5662 #endif /* defined (TIOCGPGRP ) */
5667 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5668 Sprocess_running_child_p
, 0, 1, 0,
5669 doc
: /* Return t if PROCESS has given the terminal to a child.
5670 If the operating system does not make it possible to find out,
5671 return t unconditionally. */)
5672 (Lisp_Object process
)
5674 /* Initialize in case ioctl doesn't exist or gives an error,
5675 in a way that will cause returning t. */
5678 struct Lisp_Process
*p
;
5680 proc
= get_process (process
);
5681 p
= XPROCESS (proc
);
5683 if (!EQ (p
->type
, Qreal
))
5684 error ("Process %s is not a subprocess",
5687 error ("Process %s is not active",
5690 gid
= emacs_get_tty_pgrp (p
);
5697 /* send a signal number SIGNO to PROCESS.
5698 If CURRENT_GROUP is t, that means send to the process group
5699 that currently owns the terminal being used to communicate with PROCESS.
5700 This is used for various commands in shell mode.
5701 If CURRENT_GROUP is lambda, that means send to the process group
5702 that currently owns the terminal, but only if it is NOT the shell itself.
5704 If NOMSG is zero, insert signal-announcements into process's buffers
5707 If we can, we try to signal PROCESS by sending control characters
5708 down the pty. This allows us to signal inferiors who have changed
5709 their uid, for which killpg would return an EPERM error. */
5712 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5716 register struct Lisp_Process
*p
;
5720 proc
= get_process (process
);
5721 p
= XPROCESS (proc
);
5723 if (!EQ (p
->type
, Qreal
))
5724 error ("Process %s is not a subprocess",
5727 error ("Process %s is not active",
5731 current_group
= Qnil
;
5733 /* If we are using pgrps, get a pgrp number and make it negative. */
5734 if (NILP (current_group
))
5735 /* Send the signal to the shell's process group. */
5739 #ifdef SIGNALS_VIA_CHARACTERS
5740 /* If possible, send signals to the entire pgrp
5741 by sending an input character to it. */
5744 cc_t
*sig_char
= NULL
;
5746 tcgetattr (p
->infd
, &t
);
5751 sig_char
= &t
.c_cc
[VINTR
];
5755 sig_char
= &t
.c_cc
[VQUIT
];
5759 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5760 sig_char
= &t
.c_cc
[VSWTCH
];
5762 sig_char
= &t
.c_cc
[VSUSP
];
5767 if (sig_char
&& *sig_char
!= CDISABLE
)
5769 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5772 /* If we can't send the signal with a character,
5773 fall through and send it another way. */
5775 /* The code above may fall through if it can't
5776 handle the signal. */
5777 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5780 /* Get the current pgrp using the tty itself, if we have that.
5781 Otherwise, use the pty to get the pgrp.
5782 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5783 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5784 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5785 His patch indicates that if TIOCGPGRP returns an error, then
5786 we should just assume that p->pid is also the process group id. */
5788 gid
= emacs_get_tty_pgrp (p
);
5791 /* If we can't get the information, assume
5792 the shell owns the tty. */
5795 /* It is not clear whether anything really can set GID to -1.
5796 Perhaps on some system one of those ioctls can or could do so.
5797 Or perhaps this is vestigial. */
5800 #else /* ! defined (TIOCGPGRP ) */
5801 /* Can't select pgrps on this system, so we know that
5802 the child itself heads the pgrp. */
5804 #endif /* ! defined (TIOCGPGRP ) */
5806 /* If current_group is lambda, and the shell owns the terminal,
5807 don't send any signal. */
5808 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5816 p
->raw_status_new
= 0;
5818 p
->tick
= ++process_tick
;
5821 status_notify (NULL
);
5822 redisplay_preserve_echo_area (13);
5825 #endif /* ! defined (SIGCONT) */
5829 flush_pending_output (p
->infd
);
5833 /* If we don't have process groups, send the signal to the immediate
5834 subprocess. That isn't really right, but it's better than any
5835 obvious alternative. */
5838 kill (p
->pid
, signo
);
5842 /* gid may be a pid, or minus a pgrp's number */
5844 if (!NILP (current_group
))
5846 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5847 EMACS_KILLPG (gid
, signo
);
5854 #else /* ! defined (TIOCSIGSEND) */
5855 EMACS_KILLPG (gid
, signo
);
5856 #endif /* ! defined (TIOCSIGSEND) */
5859 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5860 doc
: /* Interrupt process PROCESS.
5861 PROCESS may be a process, a buffer, or the name of a process or buffer.
5862 No arg or nil means current buffer's process.
5863 Second arg CURRENT-GROUP non-nil means send signal to
5864 the current process-group of the process's controlling terminal
5865 rather than to the process's own process group.
5866 If the process is a shell, this means interrupt current subjob
5867 rather than the shell.
5869 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5870 don't send the signal. */)
5871 (Lisp_Object process
, Lisp_Object current_group
)
5873 process_send_signal (process
, SIGINT
, current_group
, 0);
5877 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5878 doc
: /* Kill process PROCESS. May be process or name of one.
5879 See function `interrupt-process' for more details on usage. */)
5880 (Lisp_Object process
, Lisp_Object current_group
)
5882 process_send_signal (process
, SIGKILL
, current_group
, 0);
5886 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5887 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5888 See function `interrupt-process' for more details on usage. */)
5889 (Lisp_Object process
, Lisp_Object current_group
)
5891 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5895 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5896 doc
: /* Stop process PROCESS. May be process or name of one.
5897 See function `interrupt-process' for more details on usage.
5898 If PROCESS is a network or serial process, inhibit handling of incoming
5900 (Lisp_Object process
, Lisp_Object current_group
)
5902 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5904 struct Lisp_Process
*p
;
5906 p
= XPROCESS (process
);
5907 if (NILP (p
->command
)
5910 FD_CLR (p
->infd
, &input_wait_mask
);
5911 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5917 error ("No SIGTSTP support");
5919 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5924 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5925 doc
: /* Continue process PROCESS. May be process or name of one.
5926 See function `interrupt-process' for more details on usage.
5927 If PROCESS is a network or serial process, resume handling of incoming
5929 (Lisp_Object process
, Lisp_Object current_group
)
5931 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5933 struct Lisp_Process
*p
;
5935 p
= XPROCESS (process
);
5936 if (EQ (p
->command
, Qt
)
5938 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5940 FD_SET (p
->infd
, &input_wait_mask
);
5941 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5943 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5944 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5945 #else /* not WINDOWSNT */
5946 tcflush (p
->infd
, TCIFLUSH
);
5947 #endif /* not WINDOWSNT */
5953 process_send_signal (process
, SIGCONT
, current_group
, 0);
5955 error ("No SIGCONT support");
5960 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5961 2, 2, "sProcess (name or number): \nnSignal code: ",
5962 doc
: /* Send PROCESS the signal with code SIGCODE.
5963 PROCESS may also be a number specifying the process id of the
5964 process to signal; in this case, the process need not be a child of
5966 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5967 (Lisp_Object process
, Lisp_Object sigcode
)
5971 if (INTEGERP (process
))
5973 pid
= XINT (process
);
5977 if (FLOATP (process
))
5979 pid
= (pid_t
) XFLOAT_DATA (process
);
5983 if (STRINGP (process
))
5986 if (tem
= Fget_process (process
), NILP (tem
))
5988 pid
= XINT (Fstring_to_number (process
, make_number (10)));
5995 process
= get_process (process
);
6000 CHECK_PROCESS (process
);
6001 pid
= XPROCESS (process
)->pid
;
6003 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6007 #define parse_signal(NAME, VALUE) \
6008 else if (!xstrcasecmp (name, NAME)) \
6009 XSETINT (sigcode, VALUE)
6011 if (INTEGERP (sigcode
))
6017 CHECK_SYMBOL (sigcode
);
6018 name
= SSDATA (SYMBOL_NAME (sigcode
));
6020 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6026 parse_signal ("usr1", SIGUSR1
);
6029 parse_signal ("usr2", SIGUSR2
);
6032 parse_signal ("term", SIGTERM
);
6035 parse_signal ("hup", SIGHUP
);
6038 parse_signal ("int", SIGINT
);
6041 parse_signal ("quit", SIGQUIT
);
6044 parse_signal ("ill", SIGILL
);
6047 parse_signal ("abrt", SIGABRT
);
6050 parse_signal ("emt", SIGEMT
);
6053 parse_signal ("kill", SIGKILL
);
6056 parse_signal ("fpe", SIGFPE
);
6059 parse_signal ("bus", SIGBUS
);
6062 parse_signal ("segv", SIGSEGV
);
6065 parse_signal ("sys", SIGSYS
);
6068 parse_signal ("pipe", SIGPIPE
);
6071 parse_signal ("alrm", SIGALRM
);
6074 parse_signal ("urg", SIGURG
);
6077 parse_signal ("stop", SIGSTOP
);
6080 parse_signal ("tstp", SIGTSTP
);
6083 parse_signal ("cont", SIGCONT
);
6086 parse_signal ("chld", SIGCHLD
);
6089 parse_signal ("ttin", SIGTTIN
);
6092 parse_signal ("ttou", SIGTTOU
);
6095 parse_signal ("io", SIGIO
);
6098 parse_signal ("xcpu", SIGXCPU
);
6101 parse_signal ("xfsz", SIGXFSZ
);
6104 parse_signal ("vtalrm", SIGVTALRM
);
6107 parse_signal ("prof", SIGPROF
);
6110 parse_signal ("winch", SIGWINCH
);
6113 parse_signal ("info", SIGINFO
);
6116 error ("Undefined signal name %s", name
);
6121 return make_number (kill (pid
, XINT (sigcode
)));
6124 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6125 doc
: /* Make PROCESS see end-of-file in its input.
6126 EOF comes after any text already sent to it.
6127 PROCESS may be a process, a buffer, the name of a process or buffer, or
6128 nil, indicating the current buffer's process.
6129 If PROCESS is a network connection, or is a process communicating
6130 through a pipe (as opposed to a pty), then you cannot send any more
6131 text to PROCESS after you call this function.
6132 If PROCESS is a serial process, wait until all output written to the
6133 process has been transmitted to the serial port. */)
6134 (Lisp_Object process
)
6137 struct coding_system
*coding
;
6139 if (DATAGRAM_CONN_P (process
))
6142 proc
= get_process (process
);
6143 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6145 /* Make sure the process is really alive. */
6146 if (XPROCESS (proc
)->raw_status_new
)
6147 update_status (XPROCESS (proc
));
6148 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6149 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6151 if (CODING_REQUIRE_FLUSHING (coding
))
6153 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6154 send_process (proc
, "", 0, Qnil
);
6157 if (XPROCESS (proc
)->pty_flag
)
6158 send_process (proc
, "\004", 1, Qnil
);
6159 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6162 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6163 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6164 #endif /* not WINDOWSNT */
6165 /* Do nothing on Windows because writes are blocking. */
6169 int old_outfd
, new_outfd
;
6171 #ifdef HAVE_SHUTDOWN
6172 /* If this is a network connection, or socketpair is used
6173 for communication with the subprocess, call shutdown to cause EOF.
6174 (In some old system, shutdown to socketpair doesn't work.
6175 Then we just can't win.) */
6176 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6177 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6178 shutdown (XPROCESS (proc
)->outfd
, 1);
6179 /* In case of socketpair, outfd == infd, so don't close it. */
6180 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6181 emacs_close (XPROCESS (proc
)->outfd
);
6182 #else /* not HAVE_SHUTDOWN */
6183 emacs_close (XPROCESS (proc
)->outfd
);
6184 #endif /* not HAVE_SHUTDOWN */
6185 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6188 old_outfd
= XPROCESS (proc
)->outfd
;
6190 if (!proc_encode_coding_system
[new_outfd
])
6191 proc_encode_coding_system
[new_outfd
]
6192 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6193 memcpy (proc_encode_coding_system
[new_outfd
],
6194 proc_encode_coding_system
[old_outfd
],
6195 sizeof (struct coding_system
));
6196 memset (proc_encode_coding_system
[old_outfd
], 0,
6197 sizeof (struct coding_system
));
6199 XPROCESS (proc
)->outfd
= new_outfd
;
6204 /* On receipt of a signal that a child status has changed, loop asking
6205 about children with changed statuses until the system says there
6208 All we do is change the status; we do not run sentinels or print
6209 notifications. That is saved for the next time keyboard input is
6210 done, in order to avoid timing errors.
6212 ** WARNING: this can be called during garbage collection.
6213 Therefore, it must not be fooled by the presence of mark bits in
6216 ** USG WARNING: Although it is not obvious from the documentation
6217 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6218 signal() before executing at least one wait(), otherwise the
6219 handler will be called again, resulting in an infinite loop. The
6220 relevant portion of the documentation reads "SIGCLD signals will be
6221 queued and the signal-catching function will be continually
6222 reentered until the queue is empty". Invoking signal() causes the
6223 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6226 ** Malloc WARNING: This should never call malloc either directly or
6227 indirectly; if it does, that is a bug */
6231 sigchld_handler (int signo
)
6233 int old_errno
= errno
;
6235 struct Lisp_Process
*p
;
6237 SIGNAL_THREAD_CHECK (signo
);
6248 #endif /* no WUNTRACED */
6249 /* Keep trying to get a status until we get a definitive result. */
6253 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6255 while (pid
< 0 && errno
== EINTR
);
6259 /* PID == 0 means no processes found, PID == -1 means a real
6260 failure. We have done all our job, so return. */
6267 #endif /* no WNOHANG */
6269 /* Find the process that signaled us, and record its status. */
6271 /* The process can have been deleted by Fdelete_process. */
6272 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6274 Lisp_Object xpid
= XCAR (tail
);
6275 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6276 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6278 XSETCAR (tail
, Qnil
);
6279 goto sigchld_end_of_loop
;
6283 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6285 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6287 proc
= XCDR (XCAR (tail
));
6288 p
= XPROCESS (proc
);
6289 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6294 /* Look for an asynchronous process whose pid hasn't been filled
6297 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6299 proc
= XCDR (XCAR (tail
));
6300 p
= XPROCESS (proc
);
6306 /* Change the status of the process that was found. */
6309 int clear_desc_flag
= 0;
6311 p
->tick
= ++process_tick
;
6313 p
->raw_status_new
= 1;
6315 /* If process has terminated, stop waiting for its output. */
6316 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6318 clear_desc_flag
= 1;
6320 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6321 if (clear_desc_flag
)
6323 FD_CLR (p
->infd
, &input_wait_mask
);
6324 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6327 /* Tell wait_reading_process_output that it needs to wake up and
6329 if (input_available_clear_time
)
6330 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6333 /* There was no asynchronous process found for that pid: we have
6334 a synchronous process. */
6337 synch_process_alive
= 0;
6339 /* Report the status of the synchronous process. */
6341 synch_process_retcode
= WRETCODE (w
);
6342 else if (WIFSIGNALED (w
))
6343 synch_process_termsig
= WTERMSIG (w
);
6345 /* Tell wait_reading_process_output that it needs to wake up and
6347 if (input_available_clear_time
)
6348 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6351 sigchld_end_of_loop
:
6354 /* On some systems, we must return right away.
6355 If any more processes want to signal us, we will
6357 Otherwise (on systems that have WNOHANG), loop around
6358 to use up all the processes that have something to tell us. */
6359 #if (defined WINDOWSNT \
6360 || (defined USG && !defined GNU_LINUX \
6361 && !(defined HPUX && defined WNOHANG)))
6364 #endif /* USG, but not HPUX with WNOHANG */
6367 #endif /* SIGCHLD */
6371 exec_sentinel_unwind (Lisp_Object data
)
6373 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6378 exec_sentinel_error_handler (Lisp_Object error_val
)
6380 cmd_error_internal (error_val
, "error in process sentinel: ");
6382 update_echo_area ();
6383 Fsleep_for (make_number (2), Qnil
);
6388 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6390 Lisp_Object sentinel
, odeactivate
;
6391 register struct Lisp_Process
*p
= XPROCESS (proc
);
6392 int count
= SPECPDL_INDEX ();
6393 int outer_running_asynch_code
= running_asynch_code
;
6394 int waiting
= waiting_for_user_input_p
;
6396 if (inhibit_sentinels
)
6399 /* No need to gcpro these, because all we do with them later
6400 is test them for EQness, and none of them should be a string. */
6401 odeactivate
= Vdeactivate_mark
;
6403 Lisp_Object obuffer
, okeymap
;
6404 XSETBUFFER (obuffer
, current_buffer
);
6405 okeymap
= BVAR (current_buffer
, keymap
);
6408 /* There's no good reason to let sentinels change the current
6409 buffer, and many callers of accept-process-output, sit-for, and
6410 friends don't expect current-buffer to be changed from under them. */
6411 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6413 sentinel
= p
->sentinel
;
6414 if (NILP (sentinel
))
6417 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6418 assure that it gets restored no matter how the sentinel exits. */
6420 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6421 /* Inhibit quit so that random quits don't screw up a running filter. */
6422 specbind (Qinhibit_quit
, Qt
);
6423 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6425 /* In case we get recursively called,
6426 and we already saved the match data nonrecursively,
6427 save the same match data in safely recursive fashion. */
6428 if (outer_running_asynch_code
)
6431 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6432 restore_search_regs ();
6433 record_unwind_save_match_data ();
6434 Fset_match_data (tem
, Qt
);
6437 /* For speed, if a search happens within this code,
6438 save the match data in a special nonrecursive fashion. */
6439 running_asynch_code
= 1;
6441 internal_condition_case_1 (read_process_output_call
,
6443 Fcons (proc
, Fcons (reason
, Qnil
))),
6444 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6445 exec_sentinel_error_handler
);
6447 /* If we saved the match data nonrecursively, restore it now. */
6448 restore_search_regs ();
6449 running_asynch_code
= outer_running_asynch_code
;
6451 Vdeactivate_mark
= odeactivate
;
6453 /* Restore waiting_for_user_input_p as it was
6454 when we were called, in case the filter clobbered it. */
6455 waiting_for_user_input_p
= waiting
;
6458 if (! EQ (Fcurrent_buffer (), obuffer
)
6459 || ! EQ (current_buffer
->keymap
, okeymap
))
6461 /* But do it only if the caller is actually going to read events.
6462 Otherwise there's no need to make him wake up, and it could
6463 cause trouble (for example it would make sit_for return). */
6464 if (waiting_for_user_input_p
== -1)
6465 record_asynch_buffer_change ();
6467 unbind_to (count
, Qnil
);
6470 /* Report all recent events of a change in process status
6471 (either run the sentinel or output a message).
6472 This is usually done while Emacs is waiting for keyboard input
6473 but can be done at other times. */
6476 status_notify (struct Lisp_Process
*deleting_process
)
6478 register Lisp_Object proc
, buffer
;
6479 Lisp_Object tail
, msg
;
6480 struct gcpro gcpro1
, gcpro2
;
6484 /* We need to gcpro tail; if read_process_output calls a filter
6485 which deletes a process and removes the cons to which tail points
6486 from Vprocess_alist, and then causes a GC, tail is an unprotected
6490 /* Set this now, so that if new processes are created by sentinels
6491 that we run, we get called again to handle their status changes. */
6492 update_tick
= process_tick
;
6494 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6497 register struct Lisp_Process
*p
;
6499 proc
= Fcdr (XCAR (tail
));
6500 p
= XPROCESS (proc
);
6502 if (p
->tick
!= p
->update_tick
)
6504 p
->update_tick
= p
->tick
;
6506 /* If process is still active, read any output that remains. */
6507 while (! EQ (p
->filter
, Qt
)
6508 && ! EQ (p
->status
, Qconnect
)
6509 && ! EQ (p
->status
, Qlisten
)
6510 /* Network or serial process not stopped: */
6511 && ! EQ (p
->command
, Qt
)
6513 && p
!= deleting_process
6514 && read_process_output (proc
, p
->infd
) > 0);
6518 /* Get the text to use for the message. */
6519 if (p
->raw_status_new
)
6521 msg
= status_message (p
);
6523 /* If process is terminated, deactivate it or delete it. */
6525 if (CONSP (p
->status
))
6526 symbol
= XCAR (p
->status
);
6528 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6529 || EQ (symbol
, Qclosed
))
6531 if (delete_exited_processes
)
6532 remove_process (proc
);
6534 deactivate_process (proc
);
6537 /* The actions above may have further incremented p->tick.
6538 So set p->update_tick again
6539 so that an error in the sentinel will not cause
6540 this code to be run again. */
6541 p
->update_tick
= p
->tick
;
6542 /* Now output the message suitably. */
6543 if (!NILP (p
->sentinel
))
6544 exec_sentinel (proc
, msg
);
6545 /* Don't bother with a message in the buffer
6546 when a process becomes runnable. */
6547 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6550 struct buffer
*old
= current_buffer
;
6551 EMACS_INT opoint
, opoint_byte
;
6552 EMACS_INT before
, before_byte
;
6554 /* Avoid error if buffer is deleted
6555 (probably that's why the process is dead, too) */
6556 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6558 Fset_buffer (buffer
);
6561 opoint_byte
= PT_BYTE
;
6562 /* Insert new output into buffer
6563 at the current end-of-output marker,
6564 thus preserving logical ordering of input and output. */
6565 if (XMARKER (p
->mark
)->buffer
)
6566 Fgoto_char (p
->mark
);
6568 SET_PT_BOTH (ZV
, ZV_BYTE
);
6571 before_byte
= PT_BYTE
;
6573 tem
= BVAR (current_buffer
, read_only
);
6574 BVAR (current_buffer
, read_only
) = Qnil
;
6575 insert_string ("\nProcess ");
6576 Finsert (1, &p
->name
);
6577 insert_string (" ");
6579 BVAR (current_buffer
, read_only
) = tem
;
6580 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6582 if (opoint
>= before
)
6583 SET_PT_BOTH (opoint
+ (PT
- before
),
6584 opoint_byte
+ (PT_BYTE
- before_byte
));
6586 SET_PT_BOTH (opoint
, opoint_byte
);
6588 set_buffer_internal (old
);
6593 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6598 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6599 Sset_process_coding_system
, 1, 3, 0,
6600 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6601 DECODING will be used to decode subprocess output and ENCODING to
6602 encode subprocess input. */)
6603 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6605 register struct Lisp_Process
*p
;
6607 CHECK_PROCESS (process
);
6608 p
= XPROCESS (process
);
6610 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6612 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6613 Fcheck_coding_system (decoding
);
6614 Fcheck_coding_system (encoding
);
6615 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6616 p
->decode_coding_system
= decoding
;
6617 p
->encode_coding_system
= encoding
;
6618 setup_process_coding_systems (process
);
6623 DEFUN ("process-coding-system",
6624 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6625 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6626 (register Lisp_Object process
)
6628 CHECK_PROCESS (process
);
6629 return Fcons (XPROCESS (process
)->decode_coding_system
,
6630 XPROCESS (process
)->encode_coding_system
);
6633 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6634 Sset_process_filter_multibyte
, 2, 2, 0,
6635 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6636 If FLAG is non-nil, the filter is given multibyte strings.
6637 If FLAG is nil, the filter is given unibyte strings. In this case,
6638 all character code conversion except for end-of-line conversion is
6640 (Lisp_Object process
, Lisp_Object flag
)
6642 register struct Lisp_Process
*p
;
6644 CHECK_PROCESS (process
);
6645 p
= XPROCESS (process
);
6647 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6648 setup_process_coding_systems (process
);
6653 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6654 Sprocess_filter_multibyte_p
, 1, 1, 0,
6655 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6656 (Lisp_Object process
)
6658 register struct Lisp_Process
*p
;
6659 struct coding_system
*coding
;
6661 CHECK_PROCESS (process
);
6662 p
= XPROCESS (process
);
6663 coding
= proc_decode_coding_system
[p
->infd
];
6664 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6673 add_gpm_wait_descriptor (int desc
)
6675 add_keyboard_wait_descriptor (desc
);
6679 delete_gpm_wait_descriptor (int desc
)
6681 delete_keyboard_wait_descriptor (desc
);
6688 /* Return nonzero if *MASK has a bit set
6689 that corresponds to one of the keyboard input descriptors. */
6692 keyboard_bit_set (fd_set
*mask
)
6696 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6697 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6698 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6705 #else /* not subprocesses */
6707 /* Defined on msdos.c. */
6708 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6711 /* Implementation of wait_reading_process_output, assuming that there
6712 are no subprocesses. Used only by the MS-DOS build.
6714 Wait for timeout to elapse and/or keyboard input to be available.
6717 timeout in seconds, or
6718 zero for no limit, or
6719 -1 means gobble data immediately available but don't wait for any.
6721 read_kbd is a Lisp_Object:
6722 0 to ignore keyboard input, or
6723 1 to return when input is available, or
6724 -1 means caller will actually read the input, so don't throw to
6727 see full version for other parameters. We know that wait_proc will
6728 always be NULL, since `subprocesses' isn't defined.
6730 do_display != 0 means redisplay should be done to show subprocess
6731 output that arrives.
6733 Return true if we received input from any process. */
6736 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6738 Lisp_Object wait_for_cell
,
6739 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6742 EMACS_TIME end_time
, timeout
;
6743 SELECT_TYPE waitchannels
;
6746 /* What does time_limit really mean? */
6747 if (time_limit
|| microsecs
)
6749 EMACS_GET_TIME (end_time
);
6750 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6751 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6754 /* Turn off periodic alarms (in case they are in use)
6755 and then turn off any other atimers,
6756 because the select emulator uses alarms. */
6758 turn_on_atimers (0);
6762 int timeout_reduced_for_timers
= 0;
6764 /* If calling from keyboard input, do not quit
6765 since we want to return C-g as an input character.
6766 Otherwise, do pending quit if requested. */
6770 /* Exit now if the cell we're waiting for became non-nil. */
6771 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6774 /* Compute time from now till when time limit is up */
6775 /* Exit if already run out */
6776 if (time_limit
== -1)
6778 /* -1 specified for timeout means
6779 gobble output available now
6780 but don't wait at all. */
6782 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6784 else if (time_limit
|| microsecs
)
6786 EMACS_GET_TIME (timeout
);
6787 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6788 if (EMACS_TIME_NEG_P (timeout
))
6793 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6796 /* If our caller will not immediately handle keyboard events,
6797 run timer events directly.
6798 (Callers that will immediately read keyboard events
6799 call timer_delay on their own.) */
6800 if (NILP (wait_for_cell
))
6802 EMACS_TIME timer_delay
;
6806 int old_timers_run
= timers_run
;
6807 timer_delay
= timer_check ();
6808 if (timers_run
!= old_timers_run
&& do_display
)
6809 /* We must retry, since a timer may have requeued itself
6810 and that could alter the time delay. */
6811 redisplay_preserve_echo_area (14);
6815 while (!detect_input_pending ());
6817 /* If there is unread keyboard input, also return. */
6819 && requeued_events_pending_p ())
6822 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6824 EMACS_TIME difference
;
6825 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6826 if (EMACS_TIME_NEG_P (difference
))
6828 timeout
= timer_delay
;
6829 timeout_reduced_for_timers
= 1;
6834 /* Cause C-g and alarm signals to take immediate action,
6835 and cause input available signals to zero out timeout. */
6837 set_waiting_for_input (&timeout
);
6839 /* Wait till there is something to do. */
6841 if (! read_kbd
&& NILP (wait_for_cell
))
6842 FD_ZERO (&waitchannels
);
6844 FD_SET (0, &waitchannels
);
6846 /* If a frame has been newly mapped and needs updating,
6847 reprocess its display stuff. */
6848 if (frame_garbaged
&& do_display
)
6850 clear_waiting_for_input ();
6851 redisplay_preserve_echo_area (15);
6853 set_waiting_for_input (&timeout
);
6856 if (read_kbd
&& detect_input_pending ())
6859 FD_ZERO (&waitchannels
);
6862 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6867 /* Make C-g and alarm signals set flags again */
6868 clear_waiting_for_input ();
6870 /* If we woke up due to SIGWINCH, actually change size now. */
6871 do_pending_window_change (0);
6873 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6874 /* We waited the full specified time, so return now. */
6879 /* If the system call was interrupted, then go around the
6881 if (xerrno
== EINTR
)
6882 FD_ZERO (&waitchannels
);
6884 error ("select error: %s", emacs_strerror (xerrno
));
6887 /* Check for keyboard input */
6890 && detect_input_pending_run_timers (do_display
))
6892 swallow_events (do_display
);
6893 if (detect_input_pending_run_timers (do_display
))
6897 /* If there is unread keyboard input, also return. */
6899 && requeued_events_pending_p ())
6902 /* If wait_for_cell. check for keyboard input
6903 but don't run any timers.
6904 ??? (It seems wrong to me to check for keyboard
6905 input at all when wait_for_cell, but the code
6906 has been this way since July 1994.
6907 Try changing this after version 19.31.) */
6908 if (! NILP (wait_for_cell
)
6909 && detect_input_pending ())
6911 swallow_events (do_display
);
6912 if (detect_input_pending ())
6916 /* Exit now if the cell we're waiting for became non-nil. */
6917 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6926 #endif /* not subprocesses */
6928 /* The following functions are needed even if async subprocesses are
6929 not supported. Some of them are no-op stubs in that case. */
6931 /* Add DESC to the set of keyboard input descriptors. */
6934 add_keyboard_wait_descriptor (int desc
)
6936 #ifdef subprocesses /* actually means "not MSDOS" */
6937 FD_SET (desc
, &input_wait_mask
);
6938 FD_SET (desc
, &non_process_wait_mask
);
6939 if (desc
> max_input_desc
)
6940 max_input_desc
= desc
;
6944 /* From now on, do not expect DESC to give keyboard input. */
6947 delete_keyboard_wait_descriptor (int desc
)
6951 int lim
= max_input_desc
;
6953 FD_CLR (desc
, &input_wait_mask
);
6954 FD_CLR (desc
, &non_process_wait_mask
);
6956 if (desc
== max_input_desc
)
6957 for (fd
= 0; fd
< lim
; fd
++)
6958 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
6959 max_input_desc
= fd
;
6963 /* Setup coding systems of PROCESS. */
6966 setup_process_coding_systems (Lisp_Object process
)
6969 struct Lisp_Process
*p
= XPROCESS (process
);
6971 int outch
= p
->outfd
;
6972 Lisp_Object coding_system
;
6974 if (inch
< 0 || outch
< 0)
6977 if (!proc_decode_coding_system
[inch
])
6978 proc_decode_coding_system
[inch
]
6979 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6980 coding_system
= p
->decode_coding_system
;
6981 if (! NILP (p
->filter
))
6983 else if (BUFFERP (p
->buffer
))
6985 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
6986 coding_system
= raw_text_coding_system (coding_system
);
6988 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
6990 if (!proc_encode_coding_system
[outch
])
6991 proc_encode_coding_system
[outch
]
6992 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6993 setup_coding_system (p
->encode_coding_system
,
6994 proc_encode_coding_system
[outch
]);
6998 /* Close all descriptors currently in use for communication
6999 with subprocess. This is used in a newly-forked subprocess
7000 to get rid of irrelevant descriptors. */
7003 close_process_descs (void)
7007 for (i
= 0; i
< MAXDESC
; i
++)
7009 Lisp_Object process
;
7010 process
= chan_process
[i
];
7011 if (!NILP (process
))
7013 int in
= XPROCESS (process
)->infd
;
7014 int out
= XPROCESS (process
)->outfd
;
7017 if (out
>= 0 && in
!= out
)
7024 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7025 doc
: /* Return the (or a) process associated with BUFFER.
7026 BUFFER may be a buffer or the name of one. */)
7027 (register Lisp_Object buffer
)
7030 register Lisp_Object buf
, tail
, proc
;
7032 if (NILP (buffer
)) return Qnil
;
7033 buf
= Fget_buffer (buffer
);
7034 if (NILP (buf
)) return Qnil
;
7036 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7038 proc
= Fcdr (XCAR (tail
));
7039 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7042 #endif /* subprocesses */
7046 DEFUN ("process-inherit-coding-system-flag",
7047 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7049 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7050 If this flag is t, `buffer-file-coding-system' of the buffer
7051 associated with PROCESS will inherit the coding system used to decode
7052 the process output. */)
7053 (register Lisp_Object process
)
7056 CHECK_PROCESS (process
);
7057 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7059 /* Ignore the argument and return the value of
7060 inherit-process-coding-system. */
7061 return inherit_process_coding_system
? Qt
: Qnil
;
7065 /* Kill all processes associated with `buffer'.
7066 If `buffer' is nil, kill all processes */
7069 kill_buffer_processes (Lisp_Object buffer
)
7072 Lisp_Object tail
, proc
;
7074 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7076 proc
= XCDR (XCAR (tail
));
7078 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7080 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7081 Fdelete_process (proc
);
7082 else if (XPROCESS (proc
)->infd
>= 0)
7083 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7086 #else /* subprocesses */
7087 /* Since we have no subprocesses, this does nothing. */
7088 #endif /* subprocesses */
7091 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7092 Swaiting_for_user_input_p
, 0, 0, 0,
7093 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7094 This is intended for use by asynchronous process output filters and sentinels. */)
7098 return (waiting_for_user_input_p
? Qt
: Qnil
);
7104 /* Stop reading input from keyboard sources. */
7107 hold_keyboard_input (void)
7112 /* Resume reading input from keyboard sources. */
7115 unhold_keyboard_input (void)
7120 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7123 kbd_on_hold_p (void)
7125 return kbd_is_on_hold
;
7129 /* Enumeration of and access to system processes a-la ps(1). */
7131 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7133 doc
: /* Return a list of numerical process IDs of all running processes.
7134 If this functionality is unsupported, return nil.
7136 See `process-attributes' for getting attributes of a process given its ID. */)
7139 return list_system_processes ();
7142 DEFUN ("process-attributes", Fprocess_attributes
,
7143 Sprocess_attributes
, 1, 1, 0,
7144 doc
: /* Return attributes of the process given by its PID, a number.
7146 Value is an alist where each element is a cons cell of the form
7150 If this functionality is unsupported, the value is nil.
7152 See `list-system-processes' for getting a list of all process IDs.
7154 The KEYs of the attributes that this function may return are listed
7155 below, together with the type of the associated VALUE (in parentheses).
7156 Not all platforms support all of these attributes; unsupported
7157 attributes will not appear in the returned alist.
7158 Unless explicitly indicated otherwise, numbers can have either
7159 integer or floating point values.
7161 euid -- Effective user User ID of the process (number)
7162 user -- User name corresponding to euid (string)
7163 egid -- Effective user Group ID of the process (number)
7164 group -- Group name corresponding to egid (string)
7165 comm -- Command name (executable name only) (string)
7166 state -- Process state code, such as "S", "R", or "T" (string)
7167 ppid -- Parent process ID (number)
7168 pgrp -- Process group ID (number)
7169 sess -- Session ID, i.e. process ID of session leader (number)
7170 ttname -- Controlling tty name (string)
7171 tpgid -- ID of foreground process group on the process's tty (number)
7172 minflt -- number of minor page faults (number)
7173 majflt -- number of major page faults (number)
7174 cminflt -- cumulative number of minor page faults (number)
7175 cmajflt -- cumulative number of major page faults (number)
7176 utime -- user time used by the process, in the (HIGH LOW USEC) format
7177 stime -- system time used by the process, in the (HIGH LOW USEC) format
7178 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7179 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7180 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7181 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7182 pri -- priority of the process (number)
7183 nice -- nice value of the process (number)
7184 thcount -- process thread count (number)
7185 start -- time the process started, in the (HIGH LOW USEC) format
7186 vsize -- virtual memory size of the process in KB's (number)
7187 rss -- resident set size of the process in KB's (number)
7188 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7189 pcpu -- percents of CPU time used by the process (floating-point number)
7190 pmem -- percents of total physical memory used by process's resident set
7191 (floating-point number)
7192 args -- command line which invoked the process (string). */)
7195 return system_process_attributes (pid
);
7205 inhibit_sentinels
= 0;
7209 if (! noninteractive
|| initialized
)
7211 signal (SIGCHLD
, sigchld_handler
);
7214 FD_ZERO (&input_wait_mask
);
7215 FD_ZERO (&non_keyboard_wait_mask
);
7216 FD_ZERO (&non_process_wait_mask
);
7217 FD_ZERO (&write_mask
);
7218 max_process_desc
= 0;
7219 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7221 #ifdef NON_BLOCKING_CONNECT
7222 FD_ZERO (&connect_wait_mask
);
7223 num_pending_connects
= 0;
7226 #ifdef ADAPTIVE_READ_BUFFERING
7227 process_output_delay_count
= 0;
7228 process_output_skip
= 0;
7231 /* Don't do this, it caused infinite select loops. The display
7232 method should call add_keyboard_wait_descriptor on stdin if it
7235 FD_SET (0, &input_wait_mask
);
7238 Vprocess_alist
= Qnil
;
7240 deleted_pid_list
= Qnil
;
7242 for (i
= 0; i
< MAXDESC
; i
++)
7244 chan_process
[i
] = Qnil
;
7245 proc_buffered_char
[i
] = -1;
7247 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7248 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7249 #ifdef DATAGRAM_SOCKETS
7250 memset (datagram_address
, 0, sizeof datagram_address
);
7254 Lisp_Object subfeatures
= Qnil
;
7255 const struct socket_options
*sopt
;
7257 #define ADD_SUBFEATURE(key, val) \
7258 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7260 #ifdef NON_BLOCKING_CONNECT
7261 ADD_SUBFEATURE (QCnowait
, Qt
);
7263 #ifdef DATAGRAM_SOCKETS
7264 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7266 #ifdef HAVE_SEQPACKET
7267 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7269 #ifdef HAVE_LOCAL_SOCKETS
7270 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7272 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7274 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7276 #ifdef HAVE_GETSOCKNAME
7277 ADD_SUBFEATURE (QCservice
, Qt
);
7279 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7280 ADD_SUBFEATURE (QCserver
, Qt
);
7283 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7284 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7286 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7289 #if defined (DARWIN_OS)
7290 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7291 processes. As such, we only change the default value. */
7294 char const *release
= (STRINGP (Voperating_system_release
)
7295 ? SSDATA (Voperating_system_release
)
7297 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7298 && release
[1] == '.')) {
7299 Vprocess_connection_type
= Qnil
;
7303 #endif /* subprocesses */
7308 syms_of_process (void)
7312 DEFSYM (Qprocessp
, "processp");
7313 DEFSYM (Qrun
, "run");
7314 DEFSYM (Qstop
, "stop");
7315 DEFSYM (Qsignal
, "signal");
7317 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7320 Qexit = intern_c_string ("exit");
7321 staticpro (&Qexit); */
7323 DEFSYM (Qopen
, "open");
7324 DEFSYM (Qclosed
, "closed");
7325 DEFSYM (Qconnect
, "connect");
7326 DEFSYM (Qfailed
, "failed");
7327 DEFSYM (Qlisten
, "listen");
7328 DEFSYM (Qlocal
, "local");
7329 DEFSYM (Qipv4
, "ipv4");
7331 DEFSYM (Qipv6
, "ipv6");
7333 DEFSYM (Qdatagram
, "datagram");
7334 DEFSYM (Qseqpacket
, "seqpacket");
7336 DEFSYM (QCport
, ":port");
7337 DEFSYM (QCspeed
, ":speed");
7338 DEFSYM (QCprocess
, ":process");
7340 DEFSYM (QCbytesize
, ":bytesize");
7341 DEFSYM (QCstopbits
, ":stopbits");
7342 DEFSYM (QCparity
, ":parity");
7343 DEFSYM (Qodd
, "odd");
7344 DEFSYM (Qeven
, "even");
7345 DEFSYM (QCflowcontrol
, ":flowcontrol");
7348 DEFSYM (QCsummary
, ":summary");
7350 DEFSYM (Qreal
, "real");
7351 DEFSYM (Qnetwork
, "network");
7352 DEFSYM (Qserial
, "serial");
7353 DEFSYM (QCbuffer
, ":buffer");
7354 DEFSYM (QChost
, ":host");
7355 DEFSYM (QCservice
, ":service");
7356 DEFSYM (QClocal
, ":local");
7357 DEFSYM (QCremote
, ":remote");
7358 DEFSYM (QCcoding
, ":coding");
7359 DEFSYM (QCserver
, ":server");
7360 DEFSYM (QCnowait
, ":nowait");
7361 DEFSYM (QCsentinel
, ":sentinel");
7362 DEFSYM (QClog
, ":log");
7363 DEFSYM (QCnoquery
, ":noquery");
7364 DEFSYM (QCstop
, ":stop");
7365 DEFSYM (QCoptions
, ":options");
7366 DEFSYM (QCplist
, ":plist");
7368 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7370 staticpro (&Vprocess_alist
);
7372 staticpro (&deleted_pid_list
);
7375 #endif /* subprocesses */
7377 DEFSYM (QCname
, ":name");
7378 DEFSYM (QCtype
, ":type");
7380 DEFSYM (Qeuid
, "euid");
7381 DEFSYM (Qegid
, "egid");
7382 DEFSYM (Quser
, "user");
7383 DEFSYM (Qgroup
, "group");
7384 DEFSYM (Qcomm
, "comm");
7385 DEFSYM (Qstate
, "state");
7386 DEFSYM (Qppid
, "ppid");
7387 DEFSYM (Qpgrp
, "pgrp");
7388 DEFSYM (Qsess
, "sess");
7389 DEFSYM (Qttname
, "ttname");
7390 DEFSYM (Qtpgid
, "tpgid");
7391 DEFSYM (Qminflt
, "minflt");
7392 DEFSYM (Qmajflt
, "majflt");
7393 DEFSYM (Qcminflt
, "cminflt");
7394 DEFSYM (Qcmajflt
, "cmajflt");
7395 DEFSYM (Qutime
, "utime");
7396 DEFSYM (Qstime
, "stime");
7397 DEFSYM (Qtime
, "time");
7398 DEFSYM (Qcutime
, "cutime");
7399 DEFSYM (Qcstime
, "cstime");
7400 DEFSYM (Qctime
, "ctime");
7401 DEFSYM (Qpri
, "pri");
7402 DEFSYM (Qnice
, "nice");
7403 DEFSYM (Qthcount
, "thcount");
7404 DEFSYM (Qstart
, "start");
7405 DEFSYM (Qvsize
, "vsize");
7406 DEFSYM (Qrss
, "rss");
7407 DEFSYM (Qetime
, "etime");
7408 DEFSYM (Qpcpu
, "pcpu");
7409 DEFSYM (Qpmem
, "pmem");
7410 DEFSYM (Qargs
, "args");
7412 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7413 doc
: /* *Non-nil means delete processes immediately when they exit.
7414 A value of nil means don't delete them until `list-processes' is run. */);
7416 delete_exited_processes
= 1;
7419 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7420 doc
: /* Control type of device used to communicate with subprocesses.
7421 Values are nil to use a pipe, or t or `pty' to use a pty.
7422 The value has no effect if the system has no ptys or if all ptys are busy:
7423 then a pipe is used in any case.
7424 The value takes effect when `start-process' is called. */);
7425 Vprocess_connection_type
= Qt
;
7427 #ifdef ADAPTIVE_READ_BUFFERING
7428 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7429 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7430 On some systems, when Emacs reads the output from a subprocess, the output data
7431 is read in very small blocks, potentially resulting in very poor performance.
7432 This behavior can be remedied to some extent by setting this variable to a
7433 non-nil value, as it will automatically delay reading from such processes, to
7434 allow them to produce more output before Emacs tries to read it.
7435 If the value is t, the delay is reset after each write to the process; any other
7436 non-nil value means that the delay is not reset on write.
7437 The variable takes effect when `start-process' is called. */);
7438 Vprocess_adaptive_read_buffering
= Qt
;
7441 defsubr (&Sprocessp
);
7442 defsubr (&Sget_process
);
7443 defsubr (&Sdelete_process
);
7444 defsubr (&Sprocess_status
);
7445 defsubr (&Sprocess_exit_status
);
7446 defsubr (&Sprocess_id
);
7447 defsubr (&Sprocess_name
);
7448 defsubr (&Sprocess_tty_name
);
7449 defsubr (&Sprocess_command
);
7450 defsubr (&Sset_process_buffer
);
7451 defsubr (&Sprocess_buffer
);
7452 defsubr (&Sprocess_mark
);
7453 defsubr (&Sset_process_filter
);
7454 defsubr (&Sprocess_filter
);
7455 defsubr (&Sset_process_sentinel
);
7456 defsubr (&Sprocess_sentinel
);
7457 defsubr (&Sset_process_window_size
);
7458 defsubr (&Sset_process_inherit_coding_system_flag
);
7459 defsubr (&Sset_process_query_on_exit_flag
);
7460 defsubr (&Sprocess_query_on_exit_flag
);
7461 defsubr (&Sprocess_contact
);
7462 defsubr (&Sprocess_plist
);
7463 defsubr (&Sset_process_plist
);
7464 defsubr (&Sprocess_list
);
7465 defsubr (&Sstart_process
);
7466 defsubr (&Sserial_process_configure
);
7467 defsubr (&Smake_serial_process
);
7468 defsubr (&Sset_network_process_option
);
7469 defsubr (&Smake_network_process
);
7470 defsubr (&Sformat_network_address
);
7471 #if defined(HAVE_NET_IF_H)
7473 defsubr (&Snetwork_interface_list
);
7475 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7476 defsubr (&Snetwork_interface_info
);
7478 #endif /* defined(HAVE_NET_IF_H) */
7479 #ifdef DATAGRAM_SOCKETS
7480 defsubr (&Sprocess_datagram_address
);
7481 defsubr (&Sset_process_datagram_address
);
7483 defsubr (&Saccept_process_output
);
7484 defsubr (&Sprocess_send_region
);
7485 defsubr (&Sprocess_send_string
);
7486 defsubr (&Sinterrupt_process
);
7487 defsubr (&Skill_process
);
7488 defsubr (&Squit_process
);
7489 defsubr (&Sstop_process
);
7490 defsubr (&Scontinue_process
);
7491 defsubr (&Sprocess_running_child_p
);
7492 defsubr (&Sprocess_send_eof
);
7493 defsubr (&Ssignal_process
);
7494 defsubr (&Swaiting_for_user_input_p
);
7495 defsubr (&Sprocess_type
);
7496 defsubr (&Sset_process_coding_system
);
7497 defsubr (&Sprocess_coding_system
);
7498 defsubr (&Sset_process_filter_multibyte
);
7499 defsubr (&Sprocess_filter_multibyte_p
);
7501 #endif /* subprocesses */
7503 defsubr (&Sget_buffer_process
);
7504 defsubr (&Sprocess_inherit_coding_system_flag
);
7505 defsubr (&Slist_system_processes
);
7506 defsubr (&Sprocess_attributes
);