1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2012
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
37 /* Only MS-DOS does not define `subprocesses'. */
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
45 /* Are local (unix) sockets supported? */
46 #if defined (HAVE_SYS_UN_H)
47 #if !defined (AF_LOCAL) && defined (AF_UNIX)
48 #define AF_LOCAL AF_UNIX
51 #define HAVE_LOCAL_SOCKETS
56 #include <sys/ioctl.h>
57 #if defined (HAVE_NET_IF_H)
59 #endif /* HAVE_NET_IF_H */
61 #if defined (HAVE_IFADDRS_H)
62 /* Must be after net/if.h */
65 /* We only use structs from this header when we use getifaddrs. */
66 #if defined (HAVE_NET_IF_DL_H)
67 #include <net/if_dl.h>
77 #include <netinet/in.h>
78 #include <arpa/nameser.h>
90 #endif /* subprocesses */
96 #include "character.h"
101 #include "termhooks.h"
102 #include "termopts.h"
103 #include "commands.h"
104 #include "keyboard.h"
105 #include "blockinput.h"
106 #include "dispextern.h"
107 #include "composite.h"
109 #include "sysselect.h"
110 #include "syssignal.h"
116 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
117 #include "xgselect.h"
123 /* Work around GCC 4.7.0 bug with strict overflow checking; see
124 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
125 These lines can be removed once the GCC bug is fixed. */
126 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
127 # pragma GCC diagnostic ignored "-Wstrict-overflow"
130 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
131 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
132 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
133 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
134 Lisp_Object QCname
, QCtype
;
136 /* Non-zero if keyboard input is on hold, zero otherwise. */
138 static int kbd_is_on_hold
;
140 /* Nonzero means don't run process sentinels. This is used
142 int inhibit_sentinels
;
146 Lisp_Object Qprocessp
;
147 static Lisp_Object Qrun
, Qstop
, Qsignal
;
148 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
150 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
151 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
153 static Lisp_Object Qipv6
;
155 static Lisp_Object QCport
, QCprocess
;
157 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
158 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
159 static Lisp_Object QCbuffer
, QChost
, QCservice
;
160 static Lisp_Object QClocal
, QCremote
, QCcoding
;
161 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
162 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
163 static Lisp_Object Qlast_nonmenu_event
;
164 /* QCfamily is declared and initialized in xfaces.c,
165 QCfilter in keyboard.c. */
166 extern Lisp_Object QCfamily
, QCfilter
;
168 /* Qexit is declared and initialized in eval.c. */
170 /* QCfamily is defined in xfaces.c. */
171 extern Lisp_Object QCfamily
;
172 /* QCfilter is defined in keyboard.c. */
173 extern Lisp_Object QCfilter
;
175 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
176 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
177 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
178 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
184 /* Number of events of change of status of a process. */
185 static EMACS_INT process_tick
;
186 /* Number of events for which the user or sentinel has been notified. */
187 static EMACS_INT update_tick
;
189 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
191 /* Only W32 has this, it really means that select can't take write mask. */
192 #ifdef BROKEN_NON_BLOCKING_CONNECT
193 #undef NON_BLOCKING_CONNECT
194 #define SELECT_CANT_DO_WRITE_MASK
196 #ifndef NON_BLOCKING_CONNECT
198 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
199 #if defined (O_NONBLOCK) || defined (O_NDELAY)
200 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
201 #define NON_BLOCKING_CONNECT
202 #endif /* EWOULDBLOCK || EINPROGRESS */
203 #endif /* O_NONBLOCK || O_NDELAY */
204 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
205 #endif /* HAVE_SELECT */
206 #endif /* NON_BLOCKING_CONNECT */
207 #endif /* BROKEN_NON_BLOCKING_CONNECT */
209 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
210 this system. We need to read full packets, so we need a
211 "non-destructive" select. So we require either native select,
212 or emulation of select using FIONREAD. */
214 #ifdef BROKEN_DATAGRAM_SOCKETS
215 #undef DATAGRAM_SOCKETS
217 #ifndef DATAGRAM_SOCKETS
218 #if defined (HAVE_SELECT) || defined (FIONREAD)
219 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
220 #define DATAGRAM_SOCKETS
221 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
222 #endif /* HAVE_SELECT || FIONREAD */
223 #endif /* DATAGRAM_SOCKETS */
224 #endif /* BROKEN_DATAGRAM_SOCKETS */
226 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
227 # define HAVE_SEQPACKET
230 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
231 #define ADAPTIVE_READ_BUFFERING
234 #ifdef ADAPTIVE_READ_BUFFERING
235 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
236 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
237 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
239 /* Number of processes which have a non-zero read_output_delay,
240 and therefore might be delayed for adaptive read buffering. */
242 static int process_output_delay_count
;
244 /* Non-zero if any process has non-nil read_output_skip. */
246 static int process_output_skip
;
249 #define process_output_delay_count 0
252 static void create_process (Lisp_Object
, char **, Lisp_Object
);
254 static int keyboard_bit_set (SELECT_TYPE
*);
256 static void deactivate_process (Lisp_Object
);
257 static void status_notify (struct Lisp_Process
*);
258 static int read_process_output (Lisp_Object
, int);
259 static void create_pty (Lisp_Object
);
261 /* If we support a window system, turn on the code to poll periodically
262 to detect C-g. It isn't actually used when doing interrupt input. */
263 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
264 #define POLL_FOR_INPUT
267 static Lisp_Object
get_process (register Lisp_Object name
);
268 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
270 /* Mask of bits indicating the descriptors that we wait for input on. */
272 static SELECT_TYPE input_wait_mask
;
274 /* Mask that excludes keyboard input descriptor(s). */
276 static SELECT_TYPE non_keyboard_wait_mask
;
278 /* Mask that excludes process input descriptor(s). */
280 static SELECT_TYPE non_process_wait_mask
;
282 /* Mask for selecting for write. */
284 static SELECT_TYPE write_mask
;
286 #ifdef NON_BLOCKING_CONNECT
287 /* Mask of bits indicating the descriptors that we wait for connect to
288 complete on. Once they complete, they are removed from this mask
289 and added to the input_wait_mask and non_keyboard_wait_mask. */
291 static SELECT_TYPE connect_wait_mask
;
293 /* Number of bits set in connect_wait_mask. */
294 static int num_pending_connects
;
295 #endif /* NON_BLOCKING_CONNECT */
297 /* The largest descriptor currently in use for a process object. */
298 static int max_process_desc
;
300 /* The largest descriptor currently in use for input. */
301 static int max_input_desc
;
303 /* Indexed by descriptor, gives the process (if any) for that descriptor */
304 static Lisp_Object chan_process
[MAXDESC
];
306 /* Alist of elements (NAME . PROCESS) */
307 static Lisp_Object Vprocess_alist
;
309 /* Buffered-ahead input char from process, indexed by channel.
310 -1 means empty (no char is buffered).
311 Used on sys V where the only way to tell if there is any
312 output from the process is to read at least one char.
313 Always -1 on systems that support FIONREAD. */
315 static int proc_buffered_char
[MAXDESC
];
317 /* Table of `struct coding-system' for each process. */
318 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
319 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
321 #ifdef DATAGRAM_SOCKETS
322 /* Table of `partner address' for datagram sockets. */
323 static struct sockaddr_and_len
{
326 } datagram_address
[MAXDESC
];
327 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
328 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
330 #define DATAGRAM_CHAN_P(chan) (0)
331 #define DATAGRAM_CONN_P(proc) (0)
334 /* Maximum number of bytes to send to a pty without an eof. */
335 static int pty_max_bytes
;
339 static struct fd_callback_data
345 int condition
; /* mask of the defines above. */
346 } fd_callback_info
[MAXDESC
];
349 /* Add a file descriptor FD to be monitored for when read is possible.
350 When read is possible, call FUNC with argument DATA. */
353 add_read_fd (int fd
, fd_callback func
, void *data
)
355 eassert (fd
< MAXDESC
);
356 add_keyboard_wait_descriptor (fd
);
358 fd_callback_info
[fd
].func
= func
;
359 fd_callback_info
[fd
].data
= data
;
360 fd_callback_info
[fd
].condition
|= FOR_READ
;
363 /* Stop monitoring file descriptor FD for when read is possible. */
366 delete_read_fd (int fd
)
368 eassert (fd
< MAXDESC
);
369 delete_keyboard_wait_descriptor (fd
);
371 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
372 if (fd_callback_info
[fd
].condition
== 0)
374 fd_callback_info
[fd
].func
= 0;
375 fd_callback_info
[fd
].data
= 0;
379 /* Add a file descriptor FD to be monitored for when write is possible.
380 When write is possible, call FUNC with argument DATA. */
383 add_write_fd (int fd
, fd_callback func
, void *data
)
385 eassert (fd
< MAXDESC
);
386 FD_SET (fd
, &write_mask
);
387 if (fd
> max_input_desc
)
390 fd_callback_info
[fd
].func
= func
;
391 fd_callback_info
[fd
].data
= data
;
392 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
395 /* Stop monitoring file descriptor FD for when write is possible. */
398 delete_write_fd (int fd
)
400 int lim
= max_input_desc
;
402 eassert (fd
< MAXDESC
);
403 FD_CLR (fd
, &write_mask
);
404 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
405 if (fd_callback_info
[fd
].condition
== 0)
407 fd_callback_info
[fd
].func
= 0;
408 fd_callback_info
[fd
].data
= 0;
410 if (fd
== max_input_desc
)
411 for (fd
= lim
; fd
>= 0; fd
--)
412 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
422 /* Compute the Lisp form of the process status, p->status, from
423 the numeric status that was returned by `wait'. */
425 static Lisp_Object
status_convert (int);
428 update_status (struct Lisp_Process
*p
)
430 eassert (p
->raw_status_new
);
431 p
->status
= status_convert (p
->raw_status
);
432 p
->raw_status_new
= 0;
435 /* Convert a process status word in Unix format to
436 the list that we use internally. */
439 status_convert (int w
)
442 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
443 else if (WIFEXITED (w
))
444 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
445 WCOREDUMP (w
) ? Qt
: Qnil
));
446 else if (WIFSIGNALED (w
))
447 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
448 WCOREDUMP (w
) ? Qt
: Qnil
));
453 /* Given a status-list, extract the three pieces of information
454 and store them individually through the three pointers. */
457 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
471 *code
= XFASTINT (XCAR (tem
));
473 *coredump
= !NILP (tem
);
477 /* Return a string describing a process status list. */
480 status_message (struct Lisp_Process
*p
)
482 Lisp_Object status
= p
->status
;
485 Lisp_Object string
, string2
;
487 decode_status (status
, &symbol
, &code
, &coredump
);
489 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
492 synchronize_system_messages_locale ();
493 signame
= strsignal (code
);
495 string
= build_string ("unknown");
500 string
= make_unibyte_string (signame
, strlen (signame
));
501 if (! NILP (Vlocale_coding_system
))
502 string
= (code_convert_string_norecord
503 (string
, Vlocale_coding_system
, 0));
504 c1
= STRING_CHAR (SDATA (string
));
507 Faset (string
, make_number (0), make_number (c2
));
509 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
510 return concat2 (string
, string2
);
512 else if (EQ (symbol
, Qexit
))
515 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
517 return build_string ("finished\n");
518 string
= Fnumber_to_string (make_number (code
));
519 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
520 return concat3 (build_string ("exited abnormally with code "),
523 else if (EQ (symbol
, Qfailed
))
525 string
= Fnumber_to_string (make_number (code
));
526 string2
= build_string ("\n");
527 return concat3 (build_string ("failed with code "),
531 return Fcopy_sequence (Fsymbol_name (symbol
));
536 /* The file name of the pty opened by allocate_pty. */
537 static char pty_name
[24];
539 /* Open an available pty, returning a file descriptor.
540 Return -1 on failure.
541 The file name of the terminal corresponding to the pty
542 is left in the variable pty_name. */
553 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
554 for (i
= 0; i
< 16; i
++)
557 #ifdef PTY_NAME_SPRINTF
560 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
561 #endif /* no PTY_NAME_SPRINTF */
565 #else /* no PTY_OPEN */
567 { /* Some systems name their pseudoterminals so that there are gaps in
568 the usual sequence - for example, on HP9000/S700 systems, there
569 are no pseudoterminals with names ending in 'f'. So we wait for
570 three failures in a row before deciding that we've reached the
572 int failed_count
= 0;
575 if (stat (pty_name
, &stb
) < 0)
578 if (failed_count
>= 3)
585 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
587 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
590 #endif /* no PTY_OPEN */
594 /* check to make certain that both sides are available
595 this avoids a nasty yet stupid bug in rlogins */
596 #ifdef PTY_TTY_NAME_SPRINTF
599 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
600 #endif /* no PTY_TTY_NAME_SPRINTF */
601 if (access (pty_name
, 6) != 0)
616 #endif /* HAVE_PTYS */
619 make_process (Lisp_Object name
)
621 register Lisp_Object val
, tem
, name1
;
622 register struct Lisp_Process
*p
;
623 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
626 p
= allocate_process ();
627 /* Initialize Lisp data. Note that allocate_process initializes all
628 Lisp data to nil, so do it only for slots which should not be nil. */
630 p
->mark
= Fmake_marker ();
632 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
633 non-Lisp data, so do it only for slots which should not be zero. */
638 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
641 /* If name is already in use, modify it until it is unused. */
646 tem
= Fget_process (name1
);
647 if (NILP (tem
)) break;
648 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
652 XSETPROCESS (val
, p
);
653 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
658 remove_process (register Lisp_Object proc
)
660 register Lisp_Object pair
;
662 pair
= Frassq (proc
, Vprocess_alist
);
663 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
665 deactivate_process (proc
);
669 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
670 doc
: /* Return t if OBJECT is a process. */)
673 return PROCESSP (object
) ? Qt
: Qnil
;
676 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
677 doc
: /* Return the process named NAME, or nil if there is none. */)
678 (register Lisp_Object name
)
683 return Fcdr (Fassoc (name
, Vprocess_alist
));
686 /* This is how commands for the user decode process arguments. It
687 accepts a process, a process name, a buffer, a buffer name, or nil.
688 Buffers denote the first process in the buffer, and nil denotes the
692 get_process (register Lisp_Object name
)
694 register Lisp_Object proc
, obj
;
697 obj
= Fget_process (name
);
699 obj
= Fget_buffer (name
);
701 error ("Process %s does not exist", SDATA (name
));
703 else if (NILP (name
))
704 obj
= Fcurrent_buffer ();
708 /* Now obj should be either a buffer object or a process object.
712 proc
= Fget_buffer_process (obj
);
714 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
726 /* Fdelete_process promises to immediately forget about the process, but in
727 reality, Emacs needs to remember those processes until they have been
728 treated by sigchld_handler; otherwise this handler would consider the
729 process as being synchronous and say that the synchronous process is
731 static Lisp_Object deleted_pid_list
;
734 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
735 doc
: /* Delete PROCESS: kill it and forget about it immediately.
736 PROCESS may be a process, a buffer, the name of a process or buffer, or
737 nil, indicating the current buffer's process. */)
738 (register Lisp_Object process
)
740 register struct Lisp_Process
*p
;
742 process
= get_process (process
);
743 p
= XPROCESS (process
);
745 p
->raw_status_new
= 0;
746 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
748 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
749 p
->tick
= ++process_tick
;
751 redisplay_preserve_echo_area (13);
753 else if (p
->infd
>= 0)
759 /* No problem storing the pid here, as it is still in Vprocess_alist. */
760 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
761 /* GC treated elements set to nil. */
762 Fdelq (Qnil
, deleted_pid_list
));
763 /* If the process has already signaled, remove it from the list. */
764 if (p
->raw_status_new
)
767 if (CONSP (p
->status
))
768 symbol
= XCAR (p
->status
);
769 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
771 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
775 Fkill_process (process
, Qnil
);
776 /* Do this now, since remove_process will make sigchld_handler do nothing. */
778 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
779 p
->tick
= ++process_tick
;
781 redisplay_preserve_echo_area (13);
784 remove_process (process
);
788 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
789 doc
: /* Return the status of PROCESS.
790 The returned value is one of the following symbols:
791 run -- for a process that is running.
792 stop -- for a process stopped but continuable.
793 exit -- for a process that has exited.
794 signal -- for a process that has got a fatal signal.
795 open -- for a network stream connection that is open.
796 listen -- for a network stream server that is listening.
797 closed -- for a network stream connection that is closed.
798 connect -- when waiting for a non-blocking connection to complete.
799 failed -- when a non-blocking connection has failed.
800 nil -- if arg is a process name and no such process exists.
801 PROCESS may be a process, a buffer, the name of a process, or
802 nil, indicating the current buffer's process. */)
803 (register Lisp_Object process
)
805 register struct Lisp_Process
*p
;
806 register Lisp_Object status
;
808 if (STRINGP (process
))
809 process
= Fget_process (process
);
811 process
= get_process (process
);
816 p
= XPROCESS (process
);
817 if (p
->raw_status_new
)
821 status
= XCAR (status
);
822 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
824 if (EQ (status
, Qexit
))
826 else if (EQ (p
->command
, Qt
))
828 else if (EQ (status
, Qrun
))
834 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
836 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
837 If PROCESS has not yet exited or died, return 0. */)
838 (register Lisp_Object process
)
840 CHECK_PROCESS (process
);
841 if (XPROCESS (process
)->raw_status_new
)
842 update_status (XPROCESS (process
));
843 if (CONSP (XPROCESS (process
)->status
))
844 return XCAR (XCDR (XPROCESS (process
)->status
));
845 return make_number (0);
848 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
849 doc
: /* Return the process id of PROCESS.
850 This is the pid of the external process which PROCESS uses or talks to.
851 For a network connection, this value is nil. */)
852 (register Lisp_Object process
)
856 CHECK_PROCESS (process
);
857 pid
= XPROCESS (process
)->pid
;
858 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
861 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
862 doc
: /* Return the name of PROCESS, as a string.
863 This is the name of the program invoked in PROCESS,
864 possibly modified to make it unique among process names. */)
865 (register Lisp_Object process
)
867 CHECK_PROCESS (process
);
868 return XPROCESS (process
)->name
;
871 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
872 doc
: /* Return the command that was executed to start PROCESS.
873 This is a list of strings, the first string being the program executed
874 and the rest of the strings being the arguments given to it.
875 For a network or serial process, this is nil (process is running) or t
876 \(process is stopped). */)
877 (register Lisp_Object process
)
879 CHECK_PROCESS (process
);
880 return XPROCESS (process
)->command
;
883 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
884 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
885 This is the terminal that the process itself reads and writes on,
886 not the name of the pty that Emacs uses to talk with that terminal. */)
887 (register Lisp_Object process
)
889 CHECK_PROCESS (process
);
890 return XPROCESS (process
)->tty_name
;
893 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
895 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
897 (register Lisp_Object process
, Lisp_Object buffer
)
899 struct Lisp_Process
*p
;
901 CHECK_PROCESS (process
);
903 CHECK_BUFFER (buffer
);
904 p
= XPROCESS (process
);
906 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
907 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
908 setup_process_coding_systems (process
);
912 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
914 doc
: /* Return the buffer PROCESS is associated with.
915 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
916 (register Lisp_Object process
)
918 CHECK_PROCESS (process
);
919 return XPROCESS (process
)->buffer
;
922 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
924 doc
: /* Return the marker for the end of the last output from PROCESS. */)
925 (register Lisp_Object process
)
927 CHECK_PROCESS (process
);
928 return XPROCESS (process
)->mark
;
931 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
933 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
934 A value of t means stop accepting output from the process.
936 When a process has a filter, its buffer is not used for output.
937 Instead, each time it does output, the entire string of output is
938 passed to the filter.
940 The filter gets two arguments: the process and the string of output.
941 The string argument is normally a multibyte string, except:
942 - if the process' input coding system is no-conversion or raw-text,
943 it is a unibyte string (the non-converted input), or else
944 - if `default-enable-multibyte-characters' is nil, it is a unibyte
945 string (the result of converting the decoded input multibyte
946 string to unibyte with `string-make-unibyte'). */)
947 (register Lisp_Object process
, Lisp_Object filter
)
949 struct Lisp_Process
*p
;
951 CHECK_PROCESS (process
);
952 p
= XPROCESS (process
);
954 /* Don't signal an error if the process' input file descriptor
955 is closed. This could make debugging Lisp more difficult,
956 for example when doing something like
958 (setq process (start-process ...))
960 (set-process-filter process ...) */
964 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
966 FD_CLR (p
->infd
, &input_wait_mask
);
967 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
969 else if (EQ (p
->filter
, Qt
)
970 /* Network or serial process not stopped: */
971 && !EQ (p
->command
, Qt
))
973 FD_SET (p
->infd
, &input_wait_mask
);
974 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
979 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
980 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
981 setup_process_coding_systems (process
);
985 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
987 doc
: /* Returns the filter function of PROCESS; nil if none.
988 See `set-process-filter' for more info on filter functions. */)
989 (register Lisp_Object process
)
991 CHECK_PROCESS (process
);
992 return XPROCESS (process
)->filter
;
995 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
997 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
998 The sentinel is called as a function when the process changes state.
999 It gets two arguments: the process, and a string describing the change. */)
1000 (register Lisp_Object process
, Lisp_Object sentinel
)
1002 struct Lisp_Process
*p
;
1004 CHECK_PROCESS (process
);
1005 p
= XPROCESS (process
);
1007 p
->sentinel
= sentinel
;
1008 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1009 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1013 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1015 doc
: /* Return the sentinel of PROCESS; nil if none.
1016 See `set-process-sentinel' for more info on sentinels. */)
1017 (register Lisp_Object process
)
1019 CHECK_PROCESS (process
);
1020 return XPROCESS (process
)->sentinel
;
1023 DEFUN ("set-process-window-size", Fset_process_window_size
,
1024 Sset_process_window_size
, 3, 3, 0,
1025 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1026 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1028 CHECK_PROCESS (process
);
1029 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1030 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1032 if (XPROCESS (process
)->infd
< 0
1033 || set_window_size (XPROCESS (process
)->infd
,
1034 XINT (height
), XINT (width
)) <= 0)
1040 DEFUN ("set-process-inherit-coding-system-flag",
1041 Fset_process_inherit_coding_system_flag
,
1042 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1043 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1044 If the second argument FLAG is non-nil, then the variable
1045 `buffer-file-coding-system' of the buffer associated with PROCESS
1046 will be bound to the value of the coding system used to decode
1049 This is useful when the coding system specified for the process buffer
1050 leaves either the character code conversion or the end-of-line conversion
1051 unspecified, or if the coding system used to decode the process output
1052 is more appropriate for saving the process buffer.
1054 Binding the variable `inherit-process-coding-system' to non-nil before
1055 starting the process is an alternative way of setting the inherit flag
1056 for the process which will run.
1058 This function returns FLAG. */)
1059 (register Lisp_Object process
, Lisp_Object flag
)
1061 CHECK_PROCESS (process
);
1062 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1066 DEFUN ("set-process-query-on-exit-flag",
1067 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1069 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1070 If the second argument FLAG is non-nil, Emacs will query the user before
1071 exiting or killing a buffer if PROCESS is running. This function
1073 (register Lisp_Object process
, Lisp_Object flag
)
1075 CHECK_PROCESS (process
);
1076 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1080 DEFUN ("process-query-on-exit-flag",
1081 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1083 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1084 (register Lisp_Object process
)
1086 CHECK_PROCESS (process
);
1087 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1090 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1092 doc
: /* Return the contact info of PROCESS; t for a real child.
1093 For a network or serial connection, the value depends on the optional
1094 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1095 SERVICE) for a network connection or (PORT SPEED) for a serial
1096 connection. If KEY is t, the complete contact information for the
1097 connection is returned, else the specific value for the keyword KEY is
1098 returned. See `make-network-process' or `make-serial-process' for a
1099 list of keywords. */)
1100 (register Lisp_Object process
, Lisp_Object key
)
1102 Lisp_Object contact
;
1104 CHECK_PROCESS (process
);
1105 contact
= XPROCESS (process
)->childp
;
1107 #ifdef DATAGRAM_SOCKETS
1108 if (DATAGRAM_CONN_P (process
)
1109 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1110 contact
= Fplist_put (contact
, QCremote
,
1111 Fprocess_datagram_address (process
));
1114 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1116 if (NILP (key
) && NETCONN_P (process
))
1117 return Fcons (Fplist_get (contact
, QChost
),
1118 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1119 if (NILP (key
) && SERIALCONN_P (process
))
1120 return Fcons (Fplist_get (contact
, QCport
),
1121 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1122 return Fplist_get (contact
, key
);
1125 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1127 doc
: /* Return the plist of PROCESS. */)
1128 (register Lisp_Object process
)
1130 CHECK_PROCESS (process
);
1131 return XPROCESS (process
)->plist
;
1134 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1136 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1137 (register Lisp_Object process
, Lisp_Object plist
)
1139 CHECK_PROCESS (process
);
1142 XPROCESS (process
)->plist
= plist
;
1146 #if 0 /* Turned off because we don't currently record this info
1147 in the process. Perhaps add it. */
1148 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1149 doc
: /* Return the connection type of PROCESS.
1150 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1151 a socket connection. */)
1152 (Lisp_Object process
)
1154 return XPROCESS (process
)->type
;
1158 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1159 doc
: /* Return the connection type of PROCESS.
1160 The value is either the symbol `real', `network', or `serial'.
1161 PROCESS may be a process, a buffer, the name of a process or buffer, or
1162 nil, indicating the current buffer's process. */)
1163 (Lisp_Object process
)
1166 proc
= get_process (process
);
1167 return XPROCESS (proc
)->type
;
1170 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1172 doc
: /* Convert network ADDRESS from internal format to a string.
1173 A 4 or 5 element vector represents an IPv4 address (with port number).
1174 An 8 or 9 element vector represents an IPv6 address (with port number).
1175 If optional second argument OMIT-PORT is non-nil, don't include a port
1176 number in the string, even when present in ADDRESS.
1177 Returns nil if format of ADDRESS is invalid. */)
1178 (Lisp_Object address
, Lisp_Object omit_port
)
1183 if (STRINGP (address
)) /* AF_LOCAL */
1186 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1188 register struct Lisp_Vector
*p
= XVECTOR (address
);
1189 ptrdiff_t size
= p
->header
.size
;
1190 Lisp_Object args
[10];
1193 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1195 args
[0] = build_string ("%d.%d.%d.%d");
1200 args
[0] = build_string ("%d.%d.%d.%d:%d");
1203 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1205 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1210 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1216 for (i
= 0; i
< nargs
; i
++)
1218 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1221 if (nargs
<= 5 /* IPv4 */
1222 && i
< 4 /* host, not port */
1223 && XINT (p
->contents
[i
]) > 255)
1226 args
[i
+1] = p
->contents
[i
];
1229 return Fformat (nargs
+1, args
);
1232 if (CONSP (address
))
1234 Lisp_Object args
[2];
1235 args
[0] = build_string ("<Family %d>");
1236 args
[1] = Fcar (address
);
1237 return Fformat (2, args
);
1243 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1244 doc
: /* Return a list of all processes. */)
1247 return Fmapcar (Qcdr
, Vprocess_alist
);
1250 /* Starting asynchronous inferior processes. */
1252 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1254 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1255 doc
: /* Start a program in a subprocess. Return the process object for it.
1256 NAME is name for process. It is modified if necessary to make it unique.
1257 BUFFER is the buffer (or buffer name) to associate with the process.
1259 Process output (both standard output and standard error streams) goes
1260 at end of BUFFER, unless you specify an output stream or filter
1261 function to handle the output. BUFFER may also be nil, meaning that
1262 this process is not associated with any buffer.
1264 PROGRAM is the program file name. It is searched for in `exec-path'
1265 (which see). If nil, just associate a pty with the buffer. Remaining
1266 arguments are strings to give program as arguments.
1268 If you want to separate standard output from standard error, invoke
1269 the command through a shell and redirect one of them using the shell
1272 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1273 (ptrdiff_t nargs
, Lisp_Object
*args
)
1275 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1276 register unsigned char **new_argv
;
1278 ptrdiff_t count
= SPECPDL_INDEX ();
1282 buffer
= Fget_buffer_create (buffer
);
1284 /* Make sure that the child will be able to chdir to the current
1285 buffer's current directory, or its unhandled equivalent. We
1286 can't just have the child check for an error when it does the
1287 chdir, since it's in a vfork.
1289 We have to GCPRO around this because Fexpand_file_name and
1290 Funhandled_file_name_directory might call a file name handling
1291 function. The argument list is protected by the caller, so all
1292 we really have to worry about is buffer. */
1294 struct gcpro gcpro1
, gcpro2
;
1296 current_dir
= BVAR (current_buffer
, directory
);
1298 GCPRO2 (buffer
, current_dir
);
1300 current_dir
= Funhandled_file_name_directory (current_dir
);
1301 if (NILP (current_dir
))
1302 /* If the file name handler says that current_dir is unreachable, use
1303 a sensible default. */
1304 current_dir
= build_string ("~/");
1305 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1306 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1307 report_file_error ("Setting current directory",
1308 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1314 CHECK_STRING (name
);
1318 if (!NILP (program
))
1319 CHECK_STRING (program
);
1321 proc
= make_process (name
);
1322 /* If an error occurs and we can't start the process, we want to
1323 remove it from the process list. This means that each error
1324 check in create_process doesn't need to call remove_process
1325 itself; it's all taken care of here. */
1326 record_unwind_protect (start_process_unwind
, proc
);
1328 XPROCESS (proc
)->childp
= Qt
;
1329 XPROCESS (proc
)->plist
= Qnil
;
1330 XPROCESS (proc
)->type
= Qreal
;
1331 XPROCESS (proc
)->buffer
= buffer
;
1332 XPROCESS (proc
)->sentinel
= Qnil
;
1333 XPROCESS (proc
)->filter
= Qnil
;
1334 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1337 /* AKA GNUTLS_INITSTAGE(proc). */
1338 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1339 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1342 #ifdef ADAPTIVE_READ_BUFFERING
1343 XPROCESS (proc
)->adaptive_read_buffering
1344 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1345 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1348 /* Make the process marker point into the process buffer (if any). */
1349 if (BUFFERP (buffer
))
1350 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1351 BUF_ZV (XBUFFER (buffer
)),
1352 BUF_ZV_BYTE (XBUFFER (buffer
)));
1355 /* Decide coding systems for communicating with the process. Here
1356 we don't setup the structure coding_system nor pay attention to
1357 unibyte mode. They are done in create_process. */
1359 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1360 Lisp_Object coding_systems
= Qt
;
1361 Lisp_Object val
, *args2
;
1362 struct gcpro gcpro1
, gcpro2
;
1364 val
= Vcoding_system_for_read
;
1367 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1368 args2
[0] = Qstart_process
;
1369 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1370 GCPRO2 (proc
, current_dir
);
1371 if (!NILP (program
))
1372 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1374 if (CONSP (coding_systems
))
1375 val
= XCAR (coding_systems
);
1376 else if (CONSP (Vdefault_process_coding_system
))
1377 val
= XCAR (Vdefault_process_coding_system
);
1379 XPROCESS (proc
)->decode_coding_system
= val
;
1381 val
= Vcoding_system_for_write
;
1384 if (EQ (coding_systems
, Qt
))
1386 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1387 args2
[0] = Qstart_process
;
1388 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1389 GCPRO2 (proc
, current_dir
);
1390 if (!NILP (program
))
1391 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1394 if (CONSP (coding_systems
))
1395 val
= XCDR (coding_systems
);
1396 else if (CONSP (Vdefault_process_coding_system
))
1397 val
= XCDR (Vdefault_process_coding_system
);
1399 XPROCESS (proc
)->encode_coding_system
= val
;
1400 /* Note: At this moment, the above coding system may leave
1401 text-conversion or eol-conversion unspecified. They will be
1402 decided after we read output from the process and decode it by
1403 some coding system, or just before we actually send a text to
1408 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1409 XPROCESS (proc
)->decoding_carryover
= 0;
1410 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1412 XPROCESS (proc
)->inherit_coding_system_flag
1413 = !(NILP (buffer
) || !inherit_process_coding_system
);
1415 if (!NILP (program
))
1417 /* If program file name is not absolute, search our path for it.
1418 Put the name we will really use in TEM. */
1419 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1420 && !(SCHARS (program
) > 1
1421 && IS_DEVICE_SEP (SREF (program
, 1))))
1423 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1426 GCPRO4 (name
, program
, buffer
, current_dir
);
1427 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1430 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1431 tem
= Fexpand_file_name (tem
, Qnil
);
1435 if (!NILP (Ffile_directory_p (program
)))
1436 error ("Specified program for new process is a directory");
1440 /* If program file name starts with /: for quoting a magic name,
1442 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1443 && SREF (tem
, 1) == ':')
1444 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1447 Lisp_Object arg_encoding
= Qnil
;
1448 struct gcpro gcpro1
;
1451 /* Encode the file name and put it in NEW_ARGV.
1452 That's where the child will use it to execute the program. */
1453 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1455 /* Here we encode arguments by the coding system used for sending
1456 data to the process. We don't support using different coding
1457 systems for encoding arguments and for encoding data sent to the
1460 for (i
= 3; i
< nargs
; i
++)
1462 tem
= Fcons (args
[i
], tem
);
1463 CHECK_STRING (XCAR (tem
));
1464 if (STRING_MULTIBYTE (XCAR (tem
)))
1466 if (NILP (arg_encoding
))
1467 arg_encoding
= (complement_process_encoding_system
1468 (XPROCESS (proc
)->encode_coding_system
));
1470 code_convert_string_norecord
1471 (XCAR (tem
), arg_encoding
, 1));
1478 /* Now that everything is encoded we can collect the strings into
1480 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1481 new_argv
[nargs
- 2] = 0;
1483 for (i
= nargs
- 2; i
-- != 0; )
1485 new_argv
[i
] = SDATA (XCAR (tem
));
1489 create_process (proc
, (char **) new_argv
, current_dir
);
1494 return unbind_to (count
, proc
);
1497 /* This function is the unwind_protect form for Fstart_process. If
1498 PROC doesn't have its pid set, then we know someone has signaled
1499 an error and the process wasn't started successfully, so we should
1500 remove it from the process list. */
1502 start_process_unwind (Lisp_Object proc
)
1504 if (!PROCESSP (proc
))
1507 /* Was PROC started successfully?
1508 -2 is used for a pty with no process, eg for gdb. */
1509 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1510 remove_process (proc
);
1516 create_process_1 (struct atimer
*timer
)
1518 /* Nothing to do. */
1523 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1525 int inchannel
, outchannel
;
1528 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1529 int wait_child_setup
[2];
1533 struct sigaction sigint_action
;
1534 struct sigaction sigquit_action
;
1535 struct sigaction sigpipe_action
;
1537 struct sigaction sighup_action
;
1539 /* Use volatile to protect variables from being clobbered by longjmp. */
1540 volatile int forkin
, forkout
;
1541 volatile int pty_flag
= 0;
1543 extern char **environ
;
1546 inchannel
= outchannel
= -1;
1549 if (!NILP (Vprocess_connection_type
))
1550 outchannel
= inchannel
= allocate_pty ();
1554 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1555 /* On most USG systems it does not work to open the pty's tty here,
1556 then close it and reopen it in the child. */
1558 /* Don't let this terminal become our controlling terminal
1559 (in case we don't have one). */
1560 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1562 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1565 report_file_error ("Opening pty", Qnil
);
1567 forkin
= forkout
= -1;
1568 #endif /* not USG, or USG_SUBTTY_WORKS */
1572 #endif /* HAVE_PTYS */
1577 report_file_error ("Creating pipe", Qnil
);
1583 emacs_close (inchannel
);
1584 emacs_close (forkout
);
1585 report_file_error ("Creating pipe", Qnil
);
1591 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1595 tem
= pipe (wait_child_setup
);
1597 report_file_error ("Creating pipe", Qnil
);
1598 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1600 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1603 emacs_close (wait_child_setup
[0]);
1604 emacs_close (wait_child_setup
[1]);
1605 report_file_error ("Setting file descriptor flags", Qnil
);
1611 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1612 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1615 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1616 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1620 /* Record this as an active process, with its channels.
1621 As a result, child_setup will close Emacs's side of the pipes. */
1622 chan_process
[inchannel
] = process
;
1623 XPROCESS (process
)->infd
= inchannel
;
1624 XPROCESS (process
)->outfd
= outchannel
;
1626 /* Previously we recorded the tty descriptor used in the subprocess.
1627 It was only used for getting the foreground tty process, so now
1628 we just reopen the device (see emacs_get_tty_pgrp) as this is
1629 more portable (see USG_SUBTTY_WORKS above). */
1631 XPROCESS (process
)->pty_flag
= pty_flag
;
1632 XPROCESS (process
)->status
= Qrun
;
1634 /* Delay interrupts until we have a chance to store
1635 the new fork's pid in its process structure */
1636 sigemptyset (&blocked
);
1638 sigaddset (&blocked
, SIGCHLD
);
1640 #ifdef HAVE_WORKING_VFORK
1641 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1642 this sets the parent's signal handlers as well as the child's.
1643 So delay all interrupts whose handlers the child might munge,
1644 and record the current handlers so they can be restored later. */
1645 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1646 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1647 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1649 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1651 #endif /* HAVE_WORKING_VFORK */
1652 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1654 FD_SET (inchannel
, &input_wait_mask
);
1655 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1656 if (inchannel
> max_process_desc
)
1657 max_process_desc
= inchannel
;
1659 /* Until we store the proper pid, enable sigchld_handler
1660 to recognize an unknown pid as standing for this process.
1661 It is very important not to let this `marker' value stay
1662 in the table after this function has returned; if it does
1663 it might cause call-process to hang and subsequent asynchronous
1664 processes to get their return values scrambled. */
1665 XPROCESS (process
)->pid
= -1;
1667 /* This must be called after the above line because it may signal an
1669 setup_process_coding_systems (process
);
1674 /* child_setup must clobber environ on systems with true vfork.
1675 Protect it from permanent change. */
1676 char **save_environ
= environ
;
1677 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1682 #endif /* not WINDOWSNT */
1684 int xforkin
= forkin
;
1685 int xforkout
= forkout
;
1687 #if 0 /* This was probably a mistake--it duplicates code later on,
1688 but fails to handle all the cases. */
1689 /* Make sure SIGCHLD is not blocked in the child. */
1690 sigsetmask (SIGEMPTYMASK
);
1693 /* Make the pty be the controlling terminal of the process. */
1695 /* First, disconnect its current controlling terminal. */
1697 /* We tried doing setsid only if pty_flag, but it caused
1698 process_set_signal to fail on SGI when using a pipe. */
1700 /* Make the pty's terminal the controlling terminal. */
1701 if (pty_flag
&& xforkin
>= 0)
1704 /* We ignore the return value
1705 because faith@cs.unc.edu says that is necessary on Linux. */
1706 ioctl (xforkin
, TIOCSCTTY
, 0);
1709 #else /* not HAVE_SETSID */
1711 /* It's very important to call setpgrp here and no time
1712 afterwards. Otherwise, we lose our controlling tty which
1713 is set when we open the pty. */
1716 #endif /* not HAVE_SETSID */
1717 #if defined (LDISC1)
1718 if (pty_flag
&& xforkin
>= 0)
1721 tcgetattr (xforkin
, &t
);
1723 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1724 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1727 #if defined (NTTYDISC) && defined (TIOCSETD)
1728 if (pty_flag
&& xforkin
>= 0)
1730 /* Use new line discipline. */
1731 int ldisc
= NTTYDISC
;
1732 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1737 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1738 can do TIOCSPGRP only to the process's controlling tty. */
1741 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1742 I can't test it since I don't have 4.3. */
1743 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1746 ioctl (j
, TIOCNOTTY
, 0);
1750 /* In order to get a controlling terminal on some versions
1751 of BSD, it is necessary to put the process in pgrp 0
1752 before it opens the terminal. */
1760 #endif /* TIOCNOTTY */
1762 #if !defined (DONT_REOPEN_PTY)
1763 /*** There is a suggestion that this ought to be a
1764 conditional on TIOCSPGRP,
1765 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1766 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1767 that system does seem to need this code, even though
1768 both HAVE_SETSID and TIOCSCTTY are defined. */
1769 /* Now close the pty (if we had it open) and reopen it.
1770 This makes the pty the controlling terminal of the subprocess. */
1774 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1777 emacs_close (xforkin
);
1778 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1782 emacs_write (1, "Couldn't open the pty terminal ", 31);
1783 emacs_write (1, pty_name
, strlen (pty_name
));
1784 emacs_write (1, "\n", 1);
1789 #endif /* not DONT_REOPEN_PTY */
1791 #ifdef SETUP_SLAVE_PTY
1796 #endif /* SETUP_SLAVE_PTY */
1798 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1799 Now reenable it in the child, so it will die when we want it to. */
1801 signal (SIGHUP
, SIG_DFL
);
1803 #endif /* HAVE_PTYS */
1805 signal (SIGINT
, SIG_DFL
);
1806 signal (SIGQUIT
, SIG_DFL
);
1807 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1809 signal (SIGPIPE
, SIG_DFL
);
1811 /* Stop blocking signals in the child. */
1812 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1815 child_setup_tty (xforkout
);
1817 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1818 new_argv
, 1, encoded_current_dir
);
1819 #else /* not WINDOWSNT */
1821 emacs_close (wait_child_setup
[0]);
1823 child_setup (xforkin
, xforkout
, xforkout
,
1824 new_argv
, 1, encoded_current_dir
);
1825 #endif /* not WINDOWSNT */
1827 environ
= save_environ
;
1832 /* This runs in the Emacs process. */
1836 emacs_close (forkin
);
1837 if (forkin
!= forkout
&& forkout
>= 0)
1838 emacs_close (forkout
);
1842 /* vfork succeeded. */
1843 XPROCESS (process
)->pid
= pid
;
1846 register_child (pid
, inchannel
);
1847 #endif /* WINDOWSNT */
1849 /* If the subfork execv fails, and it exits,
1850 this close hangs. I don't know why.
1851 So have an interrupt jar it loose. */
1853 struct atimer
*timer
;
1857 EMACS_SET_SECS_USECS (offset
, 1, 0);
1858 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1861 emacs_close (forkin
);
1863 cancel_atimer (timer
);
1867 if (forkin
!= forkout
&& forkout
>= 0)
1868 emacs_close (forkout
);
1872 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1875 XPROCESS (process
)->tty_name
= Qnil
;
1877 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1878 /* Wait for child_setup to complete in case that vfork is
1879 actually defined as fork. The descriptor wait_child_setup[1]
1880 of a pipe is closed at the child side either by close-on-exec
1881 on successful execvp or the _exit call in child_setup. */
1885 emacs_close (wait_child_setup
[1]);
1886 emacs_read (wait_child_setup
[0], &dummy
, 1);
1887 emacs_close (wait_child_setup
[0]);
1892 /* Restore the signal state whether vfork succeeded or not.
1893 (We will signal an error, below, if it failed.) */
1894 #ifdef HAVE_WORKING_VFORK
1895 /* Restore the parent's signal handlers. */
1896 sigaction (SIGINT
, &sigint_action
, 0);
1897 sigaction (SIGQUIT
, &sigquit_action
, 0);
1898 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1900 sigaction (SIGHUP
, &sighup_action
, 0);
1902 #endif /* HAVE_WORKING_VFORK */
1903 /* Stop blocking signals in the parent. */
1904 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1906 /* Now generate the error if vfork failed. */
1908 report_file_error ("Doing vfork", Qnil
);
1912 create_pty (Lisp_Object process
)
1914 int inchannel
, outchannel
;
1917 inchannel
= outchannel
= -1;
1920 if (!NILP (Vprocess_connection_type
))
1921 outchannel
= inchannel
= allocate_pty ();
1925 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1926 /* On most USG systems it does not work to open the pty's tty here,
1927 then close it and reopen it in the child. */
1929 /* Don't let this terminal become our controlling terminal
1930 (in case we don't have one). */
1931 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1933 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1936 report_file_error ("Opening pty", Qnil
);
1937 #if defined (DONT_REOPEN_PTY)
1938 /* In the case that vfork is defined as fork, the parent process
1939 (Emacs) may send some data before the child process completes
1940 tty options setup. So we setup tty before forking. */
1941 child_setup_tty (forkout
);
1942 #endif /* DONT_REOPEN_PTY */
1943 #endif /* not USG, or USG_SUBTTY_WORKS */
1946 #endif /* HAVE_PTYS */
1949 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1950 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1953 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1954 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1958 /* Record this as an active process, with its channels.
1959 As a result, child_setup will close Emacs's side of the pipes. */
1960 chan_process
[inchannel
] = process
;
1961 XPROCESS (process
)->infd
= inchannel
;
1962 XPROCESS (process
)->outfd
= outchannel
;
1964 /* Previously we recorded the tty descriptor used in the subprocess.
1965 It was only used for getting the foreground tty process, so now
1966 we just reopen the device (see emacs_get_tty_pgrp) as this is
1967 more portable (see USG_SUBTTY_WORKS above). */
1969 XPROCESS (process
)->pty_flag
= pty_flag
;
1970 XPROCESS (process
)->status
= Qrun
;
1971 setup_process_coding_systems (process
);
1973 FD_SET (inchannel
, &input_wait_mask
);
1974 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1975 if (inchannel
> max_process_desc
)
1976 max_process_desc
= inchannel
;
1978 XPROCESS (process
)->pid
= -2;
1981 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1984 XPROCESS (process
)->tty_name
= Qnil
;
1988 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1989 The address family of sa is not included in the result. */
1992 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
1994 Lisp_Object address
;
1997 register struct Lisp_Vector
*p
;
1999 /* Workaround for a bug in getsockname on BSD: Names bound to
2000 sockets in the UNIX domain are inaccessible; getsockname returns
2001 a zero length name. */
2002 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2003 return empty_unibyte_string
;
2005 switch (sa
->sa_family
)
2009 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2010 len
= sizeof (sin
->sin_addr
) + 1;
2011 address
= Fmake_vector (make_number (len
), Qnil
);
2012 p
= XVECTOR (address
);
2013 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2014 cp
= (unsigned char *) &sin
->sin_addr
;
2020 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2021 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2022 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2023 address
= Fmake_vector (make_number (len
), Qnil
);
2024 p
= XVECTOR (address
);
2025 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2026 for (i
= 0; i
< len
; i
++)
2027 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2031 #ifdef HAVE_LOCAL_SOCKETS
2034 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2035 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2036 if (sockun
->sun_path
[i
] == 0)
2038 return make_unibyte_string (sockun
->sun_path
, i
);
2042 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2043 address
= Fcons (make_number (sa
->sa_family
),
2044 Fmake_vector (make_number (len
), Qnil
));
2045 p
= XVECTOR (XCDR (address
));
2046 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2052 p
->contents
[i
++] = make_number (*cp
++);
2058 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2061 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2063 register struct Lisp_Vector
*p
;
2065 if (VECTORP (address
))
2067 p
= XVECTOR (address
);
2068 if (p
->header
.size
== 5)
2071 return sizeof (struct sockaddr_in
);
2074 else if (p
->header
.size
== 9)
2076 *familyp
= AF_INET6
;
2077 return sizeof (struct sockaddr_in6
);
2081 #ifdef HAVE_LOCAL_SOCKETS
2082 else if (STRINGP (address
))
2084 *familyp
= AF_LOCAL
;
2085 return sizeof (struct sockaddr_un
);
2088 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2089 && VECTORP (XCDR (address
)))
2091 struct sockaddr
*sa
;
2092 *familyp
= XINT (XCAR (address
));
2093 p
= XVECTOR (XCDR (address
));
2094 return p
->header
.size
+ sizeof (sa
->sa_family
);
2099 /* Convert an address object (vector or string) to an internal sockaddr.
2101 The address format has been basically validated by
2102 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2103 it could have come from user data. So if FAMILY is not valid,
2104 we return after zeroing *SA. */
2107 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2109 register struct Lisp_Vector
*p
;
2110 register unsigned char *cp
= NULL
;
2114 memset (sa
, 0, len
);
2116 if (VECTORP (address
))
2118 p
= XVECTOR (address
);
2119 if (family
== AF_INET
)
2121 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2122 len
= sizeof (sin
->sin_addr
) + 1;
2123 hostport
= XINT (p
->contents
[--len
]);
2124 sin
->sin_port
= htons (hostport
);
2125 cp
= (unsigned char *)&sin
->sin_addr
;
2126 sa
->sa_family
= family
;
2129 else if (family
== AF_INET6
)
2131 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2132 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2133 len
= sizeof (sin6
->sin6_addr
) + 1;
2134 hostport
= XINT (p
->contents
[--len
]);
2135 sin6
->sin6_port
= htons (hostport
);
2136 for (i
= 0; i
< len
; i
++)
2137 if (INTEGERP (p
->contents
[i
]))
2139 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2142 sa
->sa_family
= family
;
2149 else if (STRINGP (address
))
2151 #ifdef HAVE_LOCAL_SOCKETS
2152 if (family
== AF_LOCAL
)
2154 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2155 cp
= SDATA (address
);
2156 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2157 sockun
->sun_path
[i
] = *cp
++;
2158 sa
->sa_family
= family
;
2165 p
= XVECTOR (XCDR (address
));
2166 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2169 for (i
= 0; i
< len
; i
++)
2170 if (INTEGERP (p
->contents
[i
]))
2171 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2174 #ifdef DATAGRAM_SOCKETS
2175 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2177 doc
: /* Get the current datagram address associated with PROCESS. */)
2178 (Lisp_Object process
)
2182 CHECK_PROCESS (process
);
2184 if (!DATAGRAM_CONN_P (process
))
2187 channel
= XPROCESS (process
)->infd
;
2188 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2189 datagram_address
[channel
].len
);
2192 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2194 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2195 Returns nil upon error setting address, ADDRESS otherwise. */)
2196 (Lisp_Object process
, Lisp_Object address
)
2201 CHECK_PROCESS (process
);
2203 if (!DATAGRAM_CONN_P (process
))
2206 channel
= XPROCESS (process
)->infd
;
2208 len
= get_lisp_to_sockaddr_size (address
, &family
);
2209 if (datagram_address
[channel
].len
!= len
)
2211 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2217 static const struct socket_options
{
2218 /* The name of this option. Should be lowercase version of option
2219 name without SO_ prefix. */
2221 /* Option level SOL_... */
2223 /* Option number SO_... */
2225 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2226 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2227 } socket_options
[] =
2229 #ifdef SO_BINDTODEVICE
2230 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2233 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2236 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2239 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2242 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2245 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2248 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2251 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2253 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2256 /* Set option OPT to value VAL on socket S.
2258 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2259 Signals an error if setting a known option fails.
2263 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2266 const struct socket_options
*sopt
;
2271 name
= SSDATA (SYMBOL_NAME (opt
));
2272 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2273 if (strcmp (name
, sopt
->name
) == 0)
2276 switch (sopt
->opttype
)
2281 optval
= NILP (val
) ? 0 : 1;
2282 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2283 &optval
, sizeof (optval
));
2290 if (TYPE_RANGED_INTEGERP (int, val
))
2291 optval
= XINT (val
);
2293 error ("Bad option value for %s", name
);
2294 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2295 &optval
, sizeof (optval
));
2299 #ifdef SO_BINDTODEVICE
2302 char devname
[IFNAMSIZ
+1];
2304 /* This is broken, at least in the Linux 2.4 kernel.
2305 To unbind, the arg must be a zero integer, not the empty string.
2306 This should work on all systems. KFS. 2003-09-23. */
2307 memset (devname
, 0, sizeof devname
);
2310 char *arg
= SSDATA (val
);
2311 int len
= min (strlen (arg
), IFNAMSIZ
);
2312 memcpy (devname
, arg
, len
);
2314 else if (!NILP (val
))
2315 error ("Bad option value for %s", name
);
2316 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2325 struct linger linger
;
2328 linger
.l_linger
= 0;
2329 if (TYPE_RANGED_INTEGERP (int, val
))
2330 linger
.l_linger
= XINT (val
);
2332 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2333 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2334 &linger
, sizeof (linger
));
2344 report_file_error ("Cannot set network option",
2345 Fcons (opt
, Fcons (val
, Qnil
)));
2346 return (1 << sopt
->optbit
);
2350 DEFUN ("set-network-process-option",
2351 Fset_network_process_option
, Sset_network_process_option
,
2353 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2354 See `make-network-process' for a list of options and values.
2355 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2356 OPTION is not a supported option, return nil instead; otherwise return t. */)
2357 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2360 struct Lisp_Process
*p
;
2362 CHECK_PROCESS (process
);
2363 p
= XPROCESS (process
);
2364 if (!NETCONN1_P (p
))
2365 error ("Process is not a network process");
2369 error ("Process is not running");
2371 if (set_socket_option (s
, option
, value
))
2373 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2377 if (NILP (no_error
))
2378 error ("Unknown or unsupported option");
2384 DEFUN ("serial-process-configure",
2385 Fserial_process_configure
,
2386 Sserial_process_configure
,
2388 doc
: /* Configure speed, bytesize, etc. of a serial process.
2390 Arguments are specified as keyword/argument pairs. Attributes that
2391 are not given are re-initialized from the process's current
2392 configuration (available via the function `process-contact') or set to
2393 reasonable default values. The following arguments are defined:
2399 -- Any of these arguments can be given to identify the process that is
2400 to be configured. If none of these arguments is given, the current
2401 buffer's process is used.
2403 :speed SPEED -- SPEED is the speed of the serial port in bits per
2404 second, also called baud rate. Any value can be given for SPEED, but
2405 most serial ports work only at a few defined values between 1200 and
2406 115200, with 9600 being the most common value. If SPEED is nil, the
2407 serial port is not configured any further, i.e., all other arguments
2408 are ignored. This may be useful for special serial ports such as
2409 Bluetooth-to-serial converters which can only be configured through AT
2410 commands. A value of nil for SPEED can be used only when passed
2411 through `make-serial-process' or `serial-term'.
2413 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2414 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2416 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2417 `odd' (use odd parity), or the symbol `even' (use even parity). If
2418 PARITY is not given, no parity is used.
2420 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2421 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2422 is not given or nil, 1 stopbit is used.
2424 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2425 flowcontrol to be used, which is either nil (don't use flowcontrol),
2426 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2427 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2428 flowcontrol is used.
2430 `serial-process-configure' is called by `make-serial-process' for the
2431 initial configuration of the serial port.
2435 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2437 \(serial-process-configure
2438 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2440 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2442 usage: (serial-process-configure &rest ARGS) */)
2443 (ptrdiff_t nargs
, Lisp_Object
*args
)
2445 struct Lisp_Process
*p
;
2446 Lisp_Object contact
= Qnil
;
2447 Lisp_Object proc
= Qnil
;
2448 struct gcpro gcpro1
;
2450 contact
= Flist (nargs
, args
);
2453 proc
= Fplist_get (contact
, QCprocess
);
2455 proc
= Fplist_get (contact
, QCname
);
2457 proc
= Fplist_get (contact
, QCbuffer
);
2459 proc
= Fplist_get (contact
, QCport
);
2460 proc
= get_process (proc
);
2461 p
= XPROCESS (proc
);
2462 if (!EQ (p
->type
, Qserial
))
2463 error ("Not a serial process");
2465 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2471 serial_configure (p
, contact
);
2477 /* Used by make-serial-process to recover from errors. */
2479 make_serial_process_unwind (Lisp_Object proc
)
2481 if (!PROCESSP (proc
))
2483 remove_process (proc
);
2487 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2489 doc
: /* Create and return a serial port process.
2491 In Emacs, serial port connections are represented by process objects,
2492 so input and output work as for subprocesses, and `delete-process'
2493 closes a serial port connection. However, a serial process has no
2494 process id, it cannot be signaled, and the status codes are different
2495 from normal processes.
2497 `make-serial-process' creates a process and a buffer, on which you
2498 probably want to use `process-send-string'. Try \\[serial-term] for
2499 an interactive terminal. See below for examples.
2501 Arguments are specified as keyword/argument pairs. The following
2502 arguments are defined:
2504 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2505 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2506 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2507 the backslashes in strings).
2509 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2510 which this function calls.
2512 :name NAME -- NAME is the name of the process. If NAME is not given,
2513 the value of PORT is used.
2515 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2516 with the process. Process output goes at the end of that buffer,
2517 unless you specify an output stream or filter function to handle the
2518 output. If BUFFER is not given, the value of NAME is used.
2520 :coding CODING -- If CODING is a symbol, it specifies the coding
2521 system used for both reading and writing for this process. If CODING
2522 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2523 ENCODING is used for writing.
2525 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2526 the process is running. If BOOL is not given, query before exiting.
2528 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2529 In the stopped state, a serial process does not accept incoming data,
2530 but you can send outgoing data. The stopped state is cleared by
2531 `continue-process' and set by `stop-process'.
2533 :filter FILTER -- Install FILTER as the process filter.
2535 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2537 :plist PLIST -- Install PLIST as the initial plist of the process.
2543 -- This function calls `serial-process-configure' to handle these
2546 The original argument list, possibly modified by later configuration,
2547 is available via the function `process-contact'.
2551 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2553 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2555 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2557 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2559 usage: (make-serial-process &rest ARGS) */)
2560 (ptrdiff_t nargs
, Lisp_Object
*args
)
2563 Lisp_Object proc
, contact
, port
;
2564 struct Lisp_Process
*p
;
2565 struct gcpro gcpro1
;
2566 Lisp_Object name
, buffer
;
2567 Lisp_Object tem
, val
;
2568 ptrdiff_t specpdl_count
= -1;
2573 contact
= Flist (nargs
, args
);
2576 port
= Fplist_get (contact
, QCport
);
2578 error ("No port specified");
2579 CHECK_STRING (port
);
2581 if (NILP (Fplist_member (contact
, QCspeed
)))
2582 error (":speed not specified");
2583 if (!NILP (Fplist_get (contact
, QCspeed
)))
2584 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2586 name
= Fplist_get (contact
, QCname
);
2589 CHECK_STRING (name
);
2590 proc
= make_process (name
);
2591 specpdl_count
= SPECPDL_INDEX ();
2592 record_unwind_protect (make_serial_process_unwind
, proc
);
2593 p
= XPROCESS (proc
);
2595 fd
= serial_open (SSDATA (port
));
2598 if (fd
> max_process_desc
)
2599 max_process_desc
= fd
;
2600 chan_process
[fd
] = proc
;
2602 buffer
= Fplist_get (contact
, QCbuffer
);
2605 buffer
= Fget_buffer_create (buffer
);
2608 p
->childp
= contact
;
2609 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2611 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2612 p
->filter
= Fplist_get (contact
, QCfilter
);
2614 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2615 p
->kill_without_query
= 1;
2616 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2620 if (!EQ (p
->command
, Qt
))
2622 FD_SET (fd
, &input_wait_mask
);
2623 FD_SET (fd
, &non_keyboard_wait_mask
);
2626 if (BUFFERP (buffer
))
2628 set_marker_both (p
->mark
, buffer
,
2629 BUF_ZV (XBUFFER (buffer
)),
2630 BUF_ZV_BYTE (XBUFFER (buffer
)));
2633 tem
= Fplist_member (contact
, QCcoding
);
2634 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2640 val
= XCAR (XCDR (tem
));
2644 else if (!NILP (Vcoding_system_for_read
))
2645 val
= Vcoding_system_for_read
;
2646 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2647 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2649 p
->decode_coding_system
= val
;
2654 val
= XCAR (XCDR (tem
));
2658 else if (!NILP (Vcoding_system_for_write
))
2659 val
= Vcoding_system_for_write
;
2660 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2661 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2663 p
->encode_coding_system
= val
;
2665 setup_process_coding_systems (proc
);
2666 p
->decoding_buf
= empty_unibyte_string
;
2667 p
->decoding_carryover
= 0;
2668 p
->encoding_buf
= empty_unibyte_string
;
2669 p
->inherit_coding_system_flag
2670 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2672 Fserial_process_configure (nargs
, args
);
2674 specpdl_ptr
= specpdl
+ specpdl_count
;
2680 /* Create a network stream/datagram client/server process. Treated
2681 exactly like a normal process when reading and writing. Primary
2682 differences are in status display and process deletion. A network
2683 connection has no PID; you cannot signal it. All you can do is
2684 stop/continue it and deactivate/close it via delete-process */
2686 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2688 doc
: /* Create and return a network server or client process.
2690 In Emacs, network connections are represented by process objects, so
2691 input and output work as for subprocesses and `delete-process' closes
2692 a network connection. However, a network process has no process id,
2693 it cannot be signaled, and the status codes are different from normal
2696 Arguments are specified as keyword/argument pairs. The following
2697 arguments are defined:
2699 :name NAME -- NAME is name for process. It is modified if necessary
2702 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2703 with the process. Process output goes at end of that buffer, unless
2704 you specify an output stream or filter function to handle the output.
2705 BUFFER may be also nil, meaning that this process is not associated
2708 :host HOST -- HOST is name of the host to connect to, or its IP
2709 address. The symbol `local' specifies the local host. If specified
2710 for a server process, it must be a valid name or address for the local
2711 host, and only clients connecting to that address will be accepted.
2713 :service SERVICE -- SERVICE is name of the service desired, or an
2714 integer specifying a port number to connect to. If SERVICE is t,
2715 a random port number is selected for the server. (If Emacs was
2716 compiled with getaddrinfo, a port number can also be specified as a
2717 string, e.g. "80", as well as an integer. This is not portable.)
2719 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2720 stream type connection, `datagram' creates a datagram type connection,
2721 `seqpacket' creates a reliable datagram connection.
2723 :family FAMILY -- FAMILY is the address (and protocol) family for the
2724 service specified by HOST and SERVICE. The default (nil) is to use
2725 whatever address family (IPv4 or IPv6) that is defined for the host
2726 and port number specified by HOST and SERVICE. Other address families
2728 local -- for a local (i.e. UNIX) address specified by SERVICE.
2729 ipv4 -- use IPv4 address family only.
2730 ipv6 -- use IPv6 address family only.
2732 :local ADDRESS -- ADDRESS is the local address used for the connection.
2733 This parameter is ignored when opening a client process. When specified
2734 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2736 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2737 connection. This parameter is ignored when opening a stream server
2738 process. For a datagram server process, it specifies the initial
2739 setting of the remote datagram address. When specified for a client
2740 process, the FAMILY, HOST, and SERVICE args are ignored.
2742 The format of ADDRESS depends on the address family:
2743 - An IPv4 address is represented as an vector of integers [A B C D P]
2744 corresponding to numeric IP address A.B.C.D and port number P.
2745 - A local address is represented as a string with the address in the
2746 local address space.
2747 - An "unsupported family" address is represented by a cons (F . AV)
2748 where F is the family number and AV is a vector containing the socket
2749 address data with one element per address data byte. Do not rely on
2750 this format in portable code, as it may depend on implementation
2751 defined constants, data sizes, and data structure alignment.
2753 :coding CODING -- If CODING is a symbol, it specifies the coding
2754 system used for both reading and writing for this process. If CODING
2755 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2756 ENCODING is used for writing.
2758 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2759 return without waiting for the connection to complete; instead, the
2760 sentinel function will be called with second arg matching "open" (if
2761 successful) or "failed" when the connect completes. Default is to use
2762 a blocking connect (i.e. wait) for stream type connections.
2764 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2765 running when Emacs is exited.
2767 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2768 In the stopped state, a server process does not accept new
2769 connections, and a client process does not handle incoming traffic.
2770 The stopped state is cleared by `continue-process' and set by
2773 :filter FILTER -- Install FILTER as the process filter.
2775 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2776 process filter are multibyte, otherwise they are unibyte.
2777 If this keyword is not specified, the strings are multibyte if
2778 the default value of `enable-multibyte-characters' is non-nil.
2780 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2782 :log LOG -- Install LOG as the server process log function. This
2783 function is called when the server accepts a network connection from a
2784 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2785 is the server process, CLIENT is the new process for the connection,
2786 and MESSAGE is a string.
2788 :plist PLIST -- Install PLIST as the new process' initial plist.
2790 :server QLEN -- if QLEN is non-nil, create a server process for the
2791 specified FAMILY, SERVICE, and connection type (stream or datagram).
2792 If QLEN is an integer, it is used as the max. length of the server's
2793 pending connection queue (also known as the backlog); the default
2794 queue length is 5. Default is to create a client process.
2796 The following network options can be specified for this connection:
2798 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2799 :dontroute BOOL -- Only send to directly connected hosts.
2800 :keepalive BOOL -- Send keep-alive messages on network stream.
2801 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2802 :oobinline BOOL -- Place out-of-band data in receive data stream.
2803 :priority INT -- Set protocol defined priority for sent packets.
2804 :reuseaddr BOOL -- Allow reusing a recently used local address
2805 (this is allowed by default for a server process).
2806 :bindtodevice NAME -- bind to interface NAME. Using this may require
2807 special privileges on some systems.
2809 Consult the relevant system programmer's manual pages for more
2810 information on using these options.
2813 A server process will listen for and accept connections from clients.
2814 When a client connection is accepted, a new network process is created
2815 for the connection with the following parameters:
2817 - The client's process name is constructed by concatenating the server
2818 process' NAME and a client identification string.
2819 - If the FILTER argument is non-nil, the client process will not get a
2820 separate process buffer; otherwise, the client's process buffer is a newly
2821 created buffer named after the server process' BUFFER name or process
2822 NAME concatenated with the client identification string.
2823 - The connection type and the process filter and sentinel parameters are
2824 inherited from the server process' TYPE, FILTER and SENTINEL.
2825 - The client process' contact info is set according to the client's
2826 addressing information (typically an IP address and a port number).
2827 - The client process' plist is initialized from the server's plist.
2829 Notice that the FILTER and SENTINEL args are never used directly by
2830 the server process. Also, the BUFFER argument is not used directly by
2831 the server process, but via the optional :log function, accepted (and
2832 failed) connections may be logged in the server process' buffer.
2834 The original argument list, modified with the actual connection
2835 information, is available via the `process-contact' function.
2837 usage: (make-network-process &rest ARGS) */)
2838 (ptrdiff_t nargs
, Lisp_Object
*args
)
2841 Lisp_Object contact
;
2842 struct Lisp_Process
*p
;
2843 #ifdef HAVE_GETADDRINFO
2844 struct addrinfo ai
, *res
, *lres
;
2845 struct addrinfo hints
;
2846 const char *portstring
;
2848 #else /* HAVE_GETADDRINFO */
2849 struct _emacs_addrinfo
2855 struct sockaddr
*ai_addr
;
2856 struct _emacs_addrinfo
*ai_next
;
2858 #endif /* HAVE_GETADDRINFO */
2859 struct sockaddr_in address_in
;
2860 #ifdef HAVE_LOCAL_SOCKETS
2861 struct sockaddr_un address_un
;
2866 int s
= -1, outch
, inch
;
2867 struct gcpro gcpro1
;
2868 ptrdiff_t count
= SPECPDL_INDEX ();
2870 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2872 Lisp_Object name
, buffer
, host
, service
, address
;
2873 Lisp_Object filter
, sentinel
;
2874 int is_non_blocking_client
= 0;
2875 int is_server
= 0, backlog
= 5;
2882 /* Save arguments for process-contact and clone-process. */
2883 contact
= Flist (nargs
, args
);
2887 /* Ensure socket support is loaded if available. */
2888 init_winsock (TRUE
);
2891 /* :type TYPE (nil: stream, datagram */
2892 tem
= Fplist_get (contact
, QCtype
);
2894 socktype
= SOCK_STREAM
;
2895 #ifdef DATAGRAM_SOCKETS
2896 else if (EQ (tem
, Qdatagram
))
2897 socktype
= SOCK_DGRAM
;
2899 #ifdef HAVE_SEQPACKET
2900 else if (EQ (tem
, Qseqpacket
))
2901 socktype
= SOCK_SEQPACKET
;
2904 error ("Unsupported connection type");
2907 tem
= Fplist_get (contact
, QCserver
);
2910 /* Don't support network sockets when non-blocking mode is
2911 not available, since a blocked Emacs is not useful. */
2912 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2913 error ("Network servers not supported");
2916 if (TYPE_RANGED_INTEGERP (int, tem
))
2917 backlog
= XINT (tem
);
2921 /* Make QCaddress an alias for :local (server) or :remote (client). */
2922 QCaddress
= is_server
? QClocal
: QCremote
;
2925 if (!is_server
&& socktype
!= SOCK_DGRAM
2926 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2928 #ifndef NON_BLOCKING_CONNECT
2929 error ("Non-blocking connect not supported");
2931 is_non_blocking_client
= 1;
2935 name
= Fplist_get (contact
, QCname
);
2936 buffer
= Fplist_get (contact
, QCbuffer
);
2937 filter
= Fplist_get (contact
, QCfilter
);
2938 sentinel
= Fplist_get (contact
, QCsentinel
);
2940 CHECK_STRING (name
);
2942 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2943 ai
.ai_socktype
= socktype
;
2948 /* :local ADDRESS or :remote ADDRESS */
2949 address
= Fplist_get (contact
, QCaddress
);
2950 if (!NILP (address
))
2952 host
= service
= Qnil
;
2954 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2955 error ("Malformed :address");
2956 ai
.ai_family
= family
;
2957 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2958 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2962 /* :family FAMILY -- nil (for Inet), local, or integer. */
2963 tem
= Fplist_get (contact
, QCfamily
);
2966 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2972 #ifdef HAVE_LOCAL_SOCKETS
2973 else if (EQ (tem
, Qlocal
))
2977 else if (EQ (tem
, Qipv6
))
2980 else if (EQ (tem
, Qipv4
))
2982 else if (TYPE_RANGED_INTEGERP (int, tem
))
2983 family
= XINT (tem
);
2985 error ("Unknown address family");
2987 ai
.ai_family
= family
;
2989 /* :service SERVICE -- string, integer (port number), or t (random port). */
2990 service
= Fplist_get (contact
, QCservice
);
2992 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2993 host
= Fplist_get (contact
, QChost
);
2996 if (EQ (host
, Qlocal
))
2997 /* Depending on setup, "localhost" may map to different IPv4 and/or
2998 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
2999 host
= build_string ("127.0.0.1");
3000 CHECK_STRING (host
);
3003 #ifdef HAVE_LOCAL_SOCKETS
3004 if (family
== AF_LOCAL
)
3008 message (":family local ignores the :host \"%s\" property",
3010 contact
= Fplist_put (contact
, QChost
, Qnil
);
3013 CHECK_STRING (service
);
3014 memset (&address_un
, 0, sizeof address_un
);
3015 address_un
.sun_family
= AF_LOCAL
;
3016 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3017 error ("Service name too long");
3018 strcpy (address_un
.sun_path
, SSDATA (service
));
3019 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3020 ai
.ai_addrlen
= sizeof address_un
;
3025 /* Slow down polling to every ten seconds.
3026 Some kernels have a bug which causes retrying connect to fail
3027 after a connect. Polling can interfere with gethostbyname too. */
3028 #ifdef POLL_FOR_INPUT
3029 if (socktype
!= SOCK_DGRAM
)
3031 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3032 bind_polling_period (10);
3036 #ifdef HAVE_GETADDRINFO
3037 /* If we have a host, use getaddrinfo to resolve both host and service.
3038 Otherwise, use getservbyname to lookup the service. */
3042 /* SERVICE can either be a string or int.
3043 Convert to a C string for later use by getaddrinfo. */
3044 if (EQ (service
, Qt
))
3046 else if (INTEGERP (service
))
3048 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3049 portstring
= portbuf
;
3053 CHECK_STRING (service
);
3054 portstring
= SSDATA (service
);
3059 memset (&hints
, 0, sizeof (hints
));
3061 hints
.ai_family
= family
;
3062 hints
.ai_socktype
= socktype
;
3063 hints
.ai_protocol
= 0;
3065 #ifdef HAVE_RES_INIT
3069 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3071 #ifdef HAVE_GAI_STRERROR
3072 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3074 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3080 #endif /* HAVE_GETADDRINFO */
3082 /* We end up here if getaddrinfo is not defined, or in case no hostname
3083 has been specified (e.g. for a local server process). */
3085 if (EQ (service
, Qt
))
3087 else if (INTEGERP (service
))
3088 port
= htons ((unsigned short) XINT (service
));
3091 struct servent
*svc_info
;
3092 CHECK_STRING (service
);
3093 svc_info
= getservbyname (SSDATA (service
),
3094 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3096 error ("Unknown service: %s", SDATA (service
));
3097 port
= svc_info
->s_port
;
3100 memset (&address_in
, 0, sizeof address_in
);
3101 address_in
.sin_family
= family
;
3102 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3103 address_in
.sin_port
= port
;
3105 #ifndef HAVE_GETADDRINFO
3108 struct hostent
*host_info_ptr
;
3110 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3111 as it may `hang' Emacs for a very long time. */
3115 #ifdef HAVE_RES_INIT
3119 host_info_ptr
= gethostbyname (SDATA (host
));
3124 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3125 host_info_ptr
->h_length
);
3126 family
= host_info_ptr
->h_addrtype
;
3127 address_in
.sin_family
= family
;
3130 /* Attempt to interpret host as numeric inet address */
3132 unsigned long numeric_addr
;
3133 numeric_addr
= inet_addr (SSDATA (host
));
3134 if (numeric_addr
== -1)
3135 error ("Unknown host \"%s\"", SDATA (host
));
3137 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3138 sizeof (address_in
.sin_addr
));
3142 #endif /* not HAVE_GETADDRINFO */
3144 ai
.ai_family
= family
;
3145 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3146 ai
.ai_addrlen
= sizeof address_in
;
3150 /* Do this in case we never enter the for-loop below. */
3151 count1
= SPECPDL_INDEX ();
3154 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3163 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3170 #ifdef DATAGRAM_SOCKETS
3171 if (!is_server
&& socktype
== SOCK_DGRAM
)
3173 #endif /* DATAGRAM_SOCKETS */
3175 #ifdef NON_BLOCKING_CONNECT
3176 if (is_non_blocking_client
)
3179 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3181 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3193 /* Make us close S if quit. */
3194 record_unwind_protect (close_file_unwind
, make_number (s
));
3196 /* Parse network options in the arg list.
3197 We simply ignore anything which isn't a known option (including other keywords).
3198 An error is signaled if setting a known option fails. */
3199 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3200 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3204 /* Configure as a server socket. */
3206 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3207 explicit :reuseaddr key to override this. */
3208 #ifdef HAVE_LOCAL_SOCKETS
3209 if (family
!= AF_LOCAL
)
3211 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3214 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3215 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3218 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3219 report_file_error ("Cannot bind server socket", Qnil
);
3221 #ifdef HAVE_GETSOCKNAME
3222 if (EQ (service
, Qt
))
3224 struct sockaddr_in sa1
;
3225 socklen_t len1
= sizeof (sa1
);
3226 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3228 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3229 service
= make_number (ntohs (sa1
.sin_port
));
3230 contact
= Fplist_put (contact
, QCservice
, service
);
3235 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3236 report_file_error ("Cannot listen on server socket", Qnil
);
3244 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3247 if (ret
== 0 || xerrno
== EISCONN
)
3249 /* The unwind-protect will be discarded afterwards.
3250 Likewise for immediate_quit. */
3254 #ifdef NON_BLOCKING_CONNECT
3256 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3260 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3267 if (xerrno
== EINTR
)
3269 /* Unlike most other syscalls connect() cannot be called
3270 again. (That would return EALREADY.) The proper way to
3271 wait for completion is pselect(). */
3279 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3285 report_file_error ("select failed", Qnil
);
3289 len
= sizeof xerrno
;
3290 eassert (FD_ISSET (s
, &fdset
));
3291 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3292 report_file_error ("getsockopt failed", Qnil
);
3294 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3298 #endif /* !WINDOWSNT */
3302 /* Discard the unwind protect closing S. */
3303 specpdl_ptr
= specpdl
+ count1
;
3308 if (xerrno
== EINTR
)
3315 #ifdef DATAGRAM_SOCKETS
3316 if (socktype
== SOCK_DGRAM
)
3318 if (datagram_address
[s
].sa
)
3320 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3321 datagram_address
[s
].len
= lres
->ai_addrlen
;
3325 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3326 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3329 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3330 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3331 conv_lisp_to_sockaddr (rfamily
, remote
,
3332 datagram_address
[s
].sa
, rlen
);
3336 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3339 contact
= Fplist_put (contact
, QCaddress
,
3340 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3341 #ifdef HAVE_GETSOCKNAME
3344 struct sockaddr_in sa1
;
3345 socklen_t len1
= sizeof (sa1
);
3346 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3347 contact
= Fplist_put (contact
, QClocal
,
3348 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3355 #ifdef HAVE_GETADDRINFO
3364 /* Discard the unwind protect for closing S, if any. */
3365 specpdl_ptr
= specpdl
+ count1
;
3367 /* Unwind bind_polling_period and request_sigio. */
3368 unbind_to (count
, Qnil
);
3372 /* If non-blocking got this far - and failed - assume non-blocking is
3373 not supported after all. This is probably a wrong assumption, but
3374 the normal blocking calls to open-network-stream handles this error
3376 if (is_non_blocking_client
)
3381 report_file_error ("make server process failed", contact
);
3383 report_file_error ("make client process failed", contact
);
3390 buffer
= Fget_buffer_create (buffer
);
3391 proc
= make_process (name
);
3393 chan_process
[inch
] = proc
;
3396 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3399 fcntl (inch
, F_SETFL
, O_NDELAY
);
3403 p
= XPROCESS (proc
);
3405 p
->childp
= contact
;
3406 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3410 p
->sentinel
= sentinel
;
3412 p
->log
= Fplist_get (contact
, QClog
);
3413 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3414 p
->kill_without_query
= 1;
3415 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3420 if (is_server
&& socktype
!= SOCK_DGRAM
)
3421 p
->status
= Qlisten
;
3423 /* Make the process marker point into the process buffer (if any). */
3424 if (BUFFERP (buffer
))
3425 set_marker_both (p
->mark
, buffer
,
3426 BUF_ZV (XBUFFER (buffer
)),
3427 BUF_ZV_BYTE (XBUFFER (buffer
)));
3429 #ifdef NON_BLOCKING_CONNECT
3430 if (is_non_blocking_client
)
3432 /* We may get here if connect did succeed immediately. However,
3433 in that case, we still need to signal this like a non-blocking
3435 p
->status
= Qconnect
;
3436 if (!FD_ISSET (inch
, &connect_wait_mask
))
3438 FD_SET (inch
, &connect_wait_mask
);
3439 FD_SET (inch
, &write_mask
);
3440 num_pending_connects
++;
3445 /* A server may have a client filter setting of Qt, but it must
3446 still listen for incoming connects unless it is stopped. */
3447 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3448 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3450 FD_SET (inch
, &input_wait_mask
);
3451 FD_SET (inch
, &non_keyboard_wait_mask
);
3454 if (inch
> max_process_desc
)
3455 max_process_desc
= inch
;
3457 tem
= Fplist_member (contact
, QCcoding
);
3458 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3459 tem
= Qnil
; /* No error message (too late!). */
3462 /* Setup coding systems for communicating with the network stream. */
3463 struct gcpro gcpro1
;
3464 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3465 Lisp_Object coding_systems
= Qt
;
3466 Lisp_Object fargs
[5], val
;
3470 val
= XCAR (XCDR (tem
));
3474 else if (!NILP (Vcoding_system_for_read
))
3475 val
= Vcoding_system_for_read
;
3476 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3477 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3478 /* We dare not decode end-of-line format by setting VAL to
3479 Qraw_text, because the existing Emacs Lisp libraries
3480 assume that they receive bare code including a sequence of
3485 if (NILP (host
) || NILP (service
))
3486 coding_systems
= Qnil
;
3489 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3490 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3492 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3495 if (CONSP (coding_systems
))
3496 val
= XCAR (coding_systems
);
3497 else if (CONSP (Vdefault_process_coding_system
))
3498 val
= XCAR (Vdefault_process_coding_system
);
3502 p
->decode_coding_system
= val
;
3506 val
= XCAR (XCDR (tem
));
3510 else if (!NILP (Vcoding_system_for_write
))
3511 val
= Vcoding_system_for_write
;
3512 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3516 if (EQ (coding_systems
, Qt
))
3518 if (NILP (host
) || NILP (service
))
3519 coding_systems
= Qnil
;
3522 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3523 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3525 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3529 if (CONSP (coding_systems
))
3530 val
= XCDR (coding_systems
);
3531 else if (CONSP (Vdefault_process_coding_system
))
3532 val
= XCDR (Vdefault_process_coding_system
);
3536 p
->encode_coding_system
= val
;
3538 setup_process_coding_systems (proc
);
3540 p
->decoding_buf
= empty_unibyte_string
;
3541 p
->decoding_carryover
= 0;
3542 p
->encoding_buf
= empty_unibyte_string
;
3544 p
->inherit_coding_system_flag
3545 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3552 #if defined (HAVE_NET_IF_H)
3555 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3556 doc
: /* Return an alist of all network interfaces and their network address.
3557 Each element is a cons, the car of which is a string containing the
3558 interface name, and the cdr is the network address in internal
3559 format; see the description of ADDRESS in `make-network-process'. */)
3562 struct ifconf ifconf
;
3563 struct ifreq
*ifreq
;
3565 ptrdiff_t buf_size
= 512;
3569 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3575 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3576 ifconf
.ifc_buf
= buf
;
3577 ifconf
.ifc_len
= buf_size
;
3578 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3585 while (ifconf
.ifc_len
== buf_size
);
3590 ifreq
= ifconf
.ifc_req
;
3591 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3593 struct ifreq
*ifq
= ifreq
;
3594 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3595 #define SIZEOF_IFREQ(sif) \
3596 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3597 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3599 int len
= SIZEOF_IFREQ (ifq
);
3601 int len
= sizeof (*ifreq
);
3603 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3605 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3607 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3610 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3611 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3612 res
= Fcons (Fcons (build_string (namebuf
),
3613 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3614 sizeof (struct sockaddr
))),
3621 #endif /* SIOCGIFCONF */
3623 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3627 const char *flag_sym
;
3630 static const struct ifflag_def ifflag_table
[] = {
3634 #ifdef IFF_BROADCAST
3635 { IFF_BROADCAST
, "broadcast" },
3638 { IFF_DEBUG
, "debug" },
3641 { IFF_LOOPBACK
, "loopback" },
3643 #ifdef IFF_POINTOPOINT
3644 { IFF_POINTOPOINT
, "pointopoint" },
3647 { IFF_RUNNING
, "running" },
3650 { IFF_NOARP
, "noarp" },
3653 { IFF_PROMISC
, "promisc" },
3655 #ifdef IFF_NOTRAILERS
3656 #ifdef NS_IMPL_COCOA
3657 /* Really means smart, notrailers is obsolete */
3658 { IFF_NOTRAILERS
, "smart" },
3660 { IFF_NOTRAILERS
, "notrailers" },
3664 { IFF_ALLMULTI
, "allmulti" },
3667 { IFF_MASTER
, "master" },
3670 { IFF_SLAVE
, "slave" },
3672 #ifdef IFF_MULTICAST
3673 { IFF_MULTICAST
, "multicast" },
3676 { IFF_PORTSEL
, "portsel" },
3678 #ifdef IFF_AUTOMEDIA
3679 { IFF_AUTOMEDIA
, "automedia" },
3682 { IFF_DYNAMIC
, "dynamic" },
3685 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3688 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3691 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3694 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3697 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3702 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3703 doc
: /* Return information about network interface named IFNAME.
3704 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3705 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3706 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3707 FLAGS is the current flags of the interface. */)
3708 (Lisp_Object ifname
)
3711 Lisp_Object res
= Qnil
;
3715 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3716 && defined HAVE_GETIFADDRS && defined LLADDR)
3717 struct ifaddrs
*ifap
;
3720 CHECK_STRING (ifname
);
3722 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3723 error ("interface name too long");
3724 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3726 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3731 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3732 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3734 int flags
= rq
.ifr_flags
;
3735 const struct ifflag_def
*fp
;
3738 /* If flags is smaller than int (i.e. short) it may have the high bit set
3739 due to IFF_MULTICAST. In that case, sign extending it into
3741 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3742 flags
= (unsigned short) rq
.ifr_flags
;
3745 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3747 if (flags
& fp
->flag_bit
)
3749 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3750 flags
-= fp
->flag_bit
;
3753 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3757 elt
= Fcons (make_number (fnum
), elt
);
3762 res
= Fcons (elt
, res
);
3765 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3766 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3768 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3769 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3773 for (n
= 0; n
< 6; n
++)
3774 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3775 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3777 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3778 if (getifaddrs (&ifap
) != -1)
3780 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3781 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3784 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3786 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3787 unsigned char linkaddr
[6];
3790 if (it
->ifa_addr
->sa_family
!= AF_LINK
3791 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3792 || sdl
->sdl_alen
!= 6)
3795 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3796 for (n
= 0; n
< 6; n
++)
3797 p
->contents
[n
] = make_number (linkaddr
[n
]);
3799 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3803 #ifdef HAVE_FREEIFADDRS
3807 #endif /* HAVE_GETIFADDRS && LLADDR */
3809 res
= Fcons (elt
, res
);
3812 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3813 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3816 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3817 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3819 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3823 res
= Fcons (elt
, res
);
3826 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3827 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3830 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3833 res
= Fcons (elt
, res
);
3836 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3837 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3840 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3843 res
= Fcons (elt
, res
);
3847 return any
? res
: Qnil
;
3850 #endif /* defined (HAVE_NET_IF_H) */
3852 /* Turn off input and output for process PROC. */
3855 deactivate_process (Lisp_Object proc
)
3857 register int inchannel
, outchannel
;
3858 register struct Lisp_Process
*p
= XPROCESS (proc
);
3861 /* Delete GnuTLS structures in PROC, if any. */
3862 emacs_gnutls_deinit (proc
);
3863 #endif /* HAVE_GNUTLS */
3865 inchannel
= p
->infd
;
3866 outchannel
= p
->outfd
;
3868 #ifdef ADAPTIVE_READ_BUFFERING
3869 if (p
->read_output_delay
> 0)
3871 if (--process_output_delay_count
< 0)
3872 process_output_delay_count
= 0;
3873 p
->read_output_delay
= 0;
3874 p
->read_output_skip
= 0;
3880 /* Beware SIGCHLD hereabouts. */
3881 flush_pending_output (inchannel
);
3882 emacs_close (inchannel
);
3883 if (outchannel
>= 0 && outchannel
!= inchannel
)
3884 emacs_close (outchannel
);
3888 #ifdef DATAGRAM_SOCKETS
3889 if (DATAGRAM_CHAN_P (inchannel
))
3891 xfree (datagram_address
[inchannel
].sa
);
3892 datagram_address
[inchannel
].sa
= 0;
3893 datagram_address
[inchannel
].len
= 0;
3896 chan_process
[inchannel
] = Qnil
;
3897 FD_CLR (inchannel
, &input_wait_mask
);
3898 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3899 #ifdef NON_BLOCKING_CONNECT
3900 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3902 FD_CLR (inchannel
, &connect_wait_mask
);
3903 FD_CLR (inchannel
, &write_mask
);
3904 if (--num_pending_connects
< 0)
3908 if (inchannel
== max_process_desc
)
3911 /* We just closed the highest-numbered process input descriptor,
3912 so recompute the highest-numbered one now. */
3913 max_process_desc
= 0;
3914 for (i
= 0; i
< MAXDESC
; i
++)
3915 if (!NILP (chan_process
[i
]))
3916 max_process_desc
= i
;
3922 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3924 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3925 It is read into the process' buffers or given to their filter functions.
3926 Non-nil arg PROCESS means do not return until some output has been received
3929 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3930 and milliseconds to wait; return after that much time whether or not
3931 there is any subprocess output. If SECONDS is a floating point number,
3932 it specifies a fractional number of seconds to wait.
3933 The MILLISEC argument is obsolete and should be avoided.
3935 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3936 from PROCESS, suspending reading output from other processes.
3937 If JUST-THIS-ONE is an integer, don't run any timers either.
3938 Return non-nil if we received any output before the timeout expired. */)
3939 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3944 if (! NILP (process
))
3945 CHECK_PROCESS (process
);
3947 just_this_one
= Qnil
;
3949 if (!NILP (millisec
))
3950 { /* Obsolete calling convention using integers rather than floats. */
3951 CHECK_NUMBER (millisec
);
3953 seconds
= make_float (XINT (millisec
) / 1000.0);
3956 CHECK_NUMBER (seconds
);
3957 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3964 if (!NILP (seconds
))
3966 if (INTEGERP (seconds
))
3968 if (0 < XINT (seconds
))
3970 secs
= XINT (seconds
);
3974 else if (FLOATP (seconds
))
3976 if (0 < XFLOAT_DATA (seconds
))
3978 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
3979 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
3980 nsecs
= EMACS_NSECS (t
);
3984 wrong_type_argument (Qnumberp
, seconds
);
3986 else if (! NILP (process
))
3990 (wait_reading_process_output (secs
, nsecs
, 0, 0,
3992 !NILP (process
) ? XPROCESS (process
) : NULL
,
3993 NILP (just_this_one
) ? 0 :
3994 !INTEGERP (just_this_one
) ? 1 : -1)
3998 /* Accept a connection for server process SERVER on CHANNEL. */
4000 static int connect_counter
= 0;
4003 server_accept_connection (Lisp_Object server
, int channel
)
4005 Lisp_Object proc
, caller
, name
, buffer
;
4006 Lisp_Object contact
, host
, service
;
4007 struct Lisp_Process
*ps
= XPROCESS (server
);
4008 struct Lisp_Process
*p
;
4012 struct sockaddr_in in
;
4014 struct sockaddr_in6 in6
;
4016 #ifdef HAVE_LOCAL_SOCKETS
4017 struct sockaddr_un un
;
4020 socklen_t len
= sizeof saddr
;
4022 s
= accept (channel
, &saddr
.sa
, &len
);
4031 if (code
== EWOULDBLOCK
)
4035 if (!NILP (ps
->log
))
4036 call3 (ps
->log
, server
, Qnil
,
4037 concat3 (build_string ("accept failed with code"),
4038 Fnumber_to_string (make_number (code
)),
4039 build_string ("\n")));
4045 /* Setup a new process to handle the connection. */
4047 /* Generate a unique identification of the caller, and build contact
4048 information for this process. */
4051 switch (saddr
.sa
.sa_family
)
4055 Lisp_Object args
[5];
4056 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4057 args
[0] = build_string ("%d.%d.%d.%d");
4058 args
[1] = make_number (*ip
++);
4059 args
[2] = make_number (*ip
++);
4060 args
[3] = make_number (*ip
++);
4061 args
[4] = make_number (*ip
++);
4062 host
= Fformat (5, args
);
4063 service
= make_number (ntohs (saddr
.in
.sin_port
));
4065 args
[0] = build_string (" <%s:%d>");
4068 caller
= Fformat (3, args
);
4075 Lisp_Object args
[9];
4076 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4078 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4079 for (i
= 0; i
< 8; i
++)
4080 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4081 host
= Fformat (9, args
);
4082 service
= make_number (ntohs (saddr
.in
.sin_port
));
4084 args
[0] = build_string (" <[%s]:%d>");
4087 caller
= Fformat (3, args
);
4092 #ifdef HAVE_LOCAL_SOCKETS
4096 caller
= Fnumber_to_string (make_number (connect_counter
));
4097 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4101 /* Create a new buffer name for this process if it doesn't have a
4102 filter. The new buffer name is based on the buffer name or
4103 process name of the server process concatenated with the caller
4106 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4110 buffer
= ps
->buffer
;
4112 buffer
= Fbuffer_name (buffer
);
4117 buffer
= concat2 (buffer
, caller
);
4118 buffer
= Fget_buffer_create (buffer
);
4122 /* Generate a unique name for the new server process. Combine the
4123 server process name with the caller identification. */
4125 name
= concat2 (ps
->name
, caller
);
4126 proc
= make_process (name
);
4128 chan_process
[s
] = proc
;
4131 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4134 fcntl (s
, F_SETFL
, O_NDELAY
);
4138 p
= XPROCESS (proc
);
4140 /* Build new contact information for this setup. */
4141 contact
= Fcopy_sequence (ps
->childp
);
4142 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4143 contact
= Fplist_put (contact
, QChost
, host
);
4144 if (!NILP (service
))
4145 contact
= Fplist_put (contact
, QCservice
, service
);
4146 contact
= Fplist_put (contact
, QCremote
,
4147 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4148 #ifdef HAVE_GETSOCKNAME
4150 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4151 contact
= Fplist_put (contact
, QClocal
,
4152 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4155 p
->childp
= contact
;
4156 p
->plist
= Fcopy_sequence (ps
->plist
);
4160 p
->sentinel
= ps
->sentinel
;
4161 p
->filter
= ps
->filter
;
4168 /* Client processes for accepted connections are not stopped initially. */
4169 if (!EQ (p
->filter
, Qt
))
4171 FD_SET (s
, &input_wait_mask
);
4172 FD_SET (s
, &non_keyboard_wait_mask
);
4175 if (s
> max_process_desc
)
4176 max_process_desc
= s
;
4178 /* Setup coding system for new process based on server process.
4179 This seems to be the proper thing to do, as the coding system
4180 of the new process should reflect the settings at the time the
4181 server socket was opened; not the current settings. */
4183 p
->decode_coding_system
= ps
->decode_coding_system
;
4184 p
->encode_coding_system
= ps
->encode_coding_system
;
4185 setup_process_coding_systems (proc
);
4187 p
->decoding_buf
= empty_unibyte_string
;
4188 p
->decoding_carryover
= 0;
4189 p
->encoding_buf
= empty_unibyte_string
;
4191 p
->inherit_coding_system_flag
4192 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4194 if (!NILP (ps
->log
))
4195 call3 (ps
->log
, server
, proc
,
4196 concat3 (build_string ("accept from "),
4197 (STRINGP (host
) ? host
: build_string ("-")),
4198 build_string ("\n")));
4200 if (!NILP (p
->sentinel
))
4201 exec_sentinel (proc
,
4202 concat3 (build_string ("open from "),
4203 (STRINGP (host
) ? host
: build_string ("-")),
4204 build_string ("\n")));
4207 /* This variable is different from waiting_for_input in keyboard.c.
4208 It is used to communicate to a lisp process-filter/sentinel (via the
4209 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4210 for user-input when that process-filter was called.
4211 waiting_for_input cannot be used as that is by definition 0 when
4212 lisp code is being evalled.
4213 This is also used in record_asynch_buffer_change.
4214 For that purpose, this must be 0
4215 when not inside wait_reading_process_output. */
4216 static int waiting_for_user_input_p
;
4219 wait_reading_process_output_unwind (Lisp_Object data
)
4221 waiting_for_user_input_p
= XINT (data
);
4225 /* This is here so breakpoints can be put on it. */
4227 wait_reading_process_output_1 (void)
4231 /* Read and dispose of subprocess output while waiting for timeout to
4232 elapse and/or keyboard input to be available.
4236 If negative, gobble data immediately available but don't wait for any.
4239 an additional duration to wait, measured in nanoseconds
4240 If TIME_LIMIT is zero, then:
4241 If NSECS == 0, there is no limit.
4242 If NSECS > 0, the timeout consists of NSECS only.
4243 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4246 0 to ignore keyboard input, or
4247 1 to return when input is available, or
4248 -1 meaning caller will actually read the input, so don't throw to
4249 the quit handler, or
4251 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4252 output that arrives.
4254 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4255 (and gobble terminal input into the buffer if any arrives).
4257 If WAIT_PROC is specified, wait until something arrives from that
4258 process. The return value is true if we read some input from
4261 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4262 (suspending output from other processes). A negative value
4263 means don't run any timers either.
4265 If WAIT_PROC is specified, then the function returns true if we
4266 received input from that process before the timeout elapsed.
4267 Otherwise, return true if we received input from any process. */
4270 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4272 Lisp_Object wait_for_cell
,
4273 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4275 register int channel
, nfds
;
4276 SELECT_TYPE Available
;
4277 SELECT_TYPE Writeok
;
4279 int check_delay
, no_avail
;
4282 EMACS_TIME timeout
, end_time
;
4283 int wait_channel
= -1;
4284 int got_some_input
= 0;
4285 ptrdiff_t count
= SPECPDL_INDEX ();
4287 FD_ZERO (&Available
);
4290 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4291 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4292 message ("Blocking call to accept-process-output with quit inhibited!!");
4294 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4295 if (wait_proc
!= NULL
)
4296 wait_channel
= wait_proc
->infd
;
4298 record_unwind_protect (wait_reading_process_output_unwind
,
4299 make_number (waiting_for_user_input_p
));
4300 waiting_for_user_input_p
= read_kbd
;
4307 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4308 time_limit
= TYPE_MAXIMUM (time_t);
4310 /* Since we may need to wait several times,
4311 compute the absolute time to return at. */
4312 if (time_limit
|| 0 < nsecs
)
4314 EMACS_GET_TIME (end_time
);
4315 EMACS_SET_SECS_NSECS (timeout
, time_limit
, nsecs
);
4316 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4321 int timeout_reduced_for_timers
= 0;
4323 /* If calling from keyboard input, do not quit
4324 since we want to return C-g as an input character.
4325 Otherwise, do pending quit if requested. */
4330 process_pending_signals ();
4333 /* Exit now if the cell we're waiting for became non-nil. */
4334 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4337 /* Compute time from now till when time limit is up */
4338 /* Exit if already run out */
4341 /* A negative timeout means
4342 gobble output available now
4343 but don't wait at all. */
4345 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4347 else if (time_limit
|| 0 < nsecs
)
4349 EMACS_GET_TIME (timeout
);
4350 if (EMACS_TIME_LE (end_time
, timeout
))
4352 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4356 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4359 /* Normally we run timers here.
4360 But not if wait_for_cell; in those cases,
4361 the wait is supposed to be short,
4362 and those callers cannot handle running arbitrary Lisp code here. */
4363 if (NILP (wait_for_cell
)
4364 && just_wait_proc
>= 0)
4366 EMACS_TIME timer_delay
;
4370 int old_timers_run
= timers_run
;
4371 struct buffer
*old_buffer
= current_buffer
;
4372 Lisp_Object old_window
= selected_window
;
4374 timer_delay
= timer_check ();
4376 /* If a timer has run, this might have changed buffers
4377 an alike. Make read_key_sequence aware of that. */
4378 if (timers_run
!= old_timers_run
4379 && (old_buffer
!= current_buffer
4380 || !EQ (old_window
, selected_window
))
4381 && waiting_for_user_input_p
== -1)
4382 record_asynch_buffer_change ();
4384 if (timers_run
!= old_timers_run
&& do_display
)
4385 /* We must retry, since a timer may have requeued itself
4386 and that could alter the time_delay. */
4387 redisplay_preserve_echo_area (9);
4391 while (!detect_input_pending ());
4393 /* If there is unread keyboard input, also return. */
4395 && requeued_events_pending_p ())
4398 /* A negative timeout means do not wait at all. */
4401 if (EMACS_TIME_VALID_P (timer_delay
))
4403 if (EMACS_TIME_LT (timer_delay
, timeout
))
4405 timeout
= timer_delay
;
4406 timeout_reduced_for_timers
= 1;
4411 /* This is so a breakpoint can be put here. */
4412 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 ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4444 #ifdef NON_BLOCKING_CONNECT
4445 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4449 NULL
, &timeout
, NULL
)
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 nsecs
= EMACS_NSECS (timeout
);
4573 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4574 nsecs
= 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
< nsecs
)
4590 nsecs
= XPROCESS (proc
)->read_output_delay
;
4593 EMACS_SET_SECS_NSECS (timeout
, 0, nsecs
);
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 NULL
, &timeout
, NULL
);
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. */
4618 /* We're not waiting on a specific process, so loop
4619 through all the channels and check for data.
4620 This is a workaround needed for some versions of
4621 the gnutls library -- 2.12.14 has been confirmed
4623 http://comments.gmane.org/gmane.emacs.devel/145074 */
4624 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4625 if (! NILP (chan_process
[channel
]))
4627 struct Lisp_Process
*p
=
4628 XPROCESS (chan_process
[channel
]);
4629 if (p
&& p
->gnutls_p
&& p
->infd
4630 && ((emacs_gnutls_record_check_pending
4635 FD_SET (p
->infd
, &Available
);
4641 /* Check this specific channel. */
4642 if (wait_proc
->gnutls_p
/* Check for valid process. */
4643 /* Do we have pending data? */
4644 && ((emacs_gnutls_record_check_pending
4645 (wait_proc
->gnutls_state
))
4649 /* Set to Available. */
4650 FD_SET (wait_proc
->infd
, &Available
);
4659 /* Make C-g and alarm signals set flags again */
4660 clear_waiting_for_input ();
4662 /* If we woke up due to SIGWINCH, actually change size now. */
4663 do_pending_window_change (0);
4665 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4666 /* We waited the full specified time, so return now. */
4670 if (xerrno
== EINTR
)
4672 else if (xerrno
== EBADF
)
4675 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4676 the child's closure of the pts gives the parent a SIGHUP, and
4677 the ptc file descriptor is automatically closed,
4678 yielding EBADF here or at select() call above.
4679 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4680 in m/ibmrt-aix.h), and here we just ignore the select error.
4681 Cleanup occurs c/o status_notify after SIGCLD. */
4682 no_avail
= 1; /* Cannot depend on values returned */
4688 error ("select error: %s", emacs_strerror (xerrno
));
4693 FD_ZERO (&Available
);
4697 #if 0 /* When polling is used, interrupt_input is 0,
4698 so get_input_pending should read the input.
4699 So this should not be needed. */
4700 /* If we are using polling for input,
4701 and we see input available, make it get read now.
4702 Otherwise it might not actually get read for a second.
4703 And on hpux, since we turn off polling in wait_reading_process_output,
4704 it might never get read at all if we don't spend much time
4705 outside of wait_reading_process_output. */
4706 if (read_kbd
&& interrupt_input
4707 && keyboard_bit_set (&Available
)
4708 && input_polling_used ())
4709 kill (getpid (), SIGALRM
);
4712 /* Check for keyboard input */
4713 /* If there is any, return immediately
4714 to give it higher priority than subprocesses */
4718 int old_timers_run
= timers_run
;
4719 struct buffer
*old_buffer
= current_buffer
;
4720 Lisp_Object old_window
= selected_window
;
4723 if (detect_input_pending_run_timers (do_display
))
4725 swallow_events (do_display
);
4726 if (detect_input_pending_run_timers (do_display
))
4730 /* If a timer has run, this might have changed buffers
4731 an alike. Make read_key_sequence aware of that. */
4732 if (timers_run
!= old_timers_run
4733 && waiting_for_user_input_p
== -1
4734 && (old_buffer
!= current_buffer
4735 || !EQ (old_window
, selected_window
)))
4736 record_asynch_buffer_change ();
4742 /* If there is unread keyboard input, also return. */
4744 && requeued_events_pending_p ())
4747 /* If we are not checking for keyboard input now,
4748 do process events (but don't run any timers).
4749 This is so that X events will be processed.
4750 Otherwise they may have to wait until polling takes place.
4751 That would causes delays in pasting selections, for example.
4753 (We used to do this only if wait_for_cell.) */
4754 if (read_kbd
== 0 && detect_input_pending ())
4756 swallow_events (do_display
);
4757 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4758 if (detect_input_pending ())
4763 /* Exit now if the cell we're waiting for became non-nil. */
4764 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4768 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4769 go read it. This can happen with X on BSD after logging out.
4770 In that case, there really is no input and no SIGIO,
4771 but select says there is input. */
4773 if (read_kbd
&& interrupt_input
4774 && keyboard_bit_set (&Available
) && ! noninteractive
)
4775 kill (getpid (), SIGIO
);
4779 got_some_input
|= nfds
> 0;
4781 /* If checking input just got us a size-change event from X,
4782 obey it now if we should. */
4783 if (read_kbd
|| ! NILP (wait_for_cell
))
4784 do_pending_window_change (0);
4786 /* Check for data from a process. */
4787 if (no_avail
|| nfds
== 0)
4790 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4792 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4793 if (FD_ISSET (channel
, &Available
)
4795 && (d
->condition
& FOR_READ
) != 0)
4796 d
->func (channel
, d
->data
, 1);
4797 if (FD_ISSET (channel
, &write_mask
)
4799 && (d
->condition
& FOR_WRITE
) != 0)
4800 d
->func (channel
, d
->data
, 0);
4803 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4805 if (FD_ISSET (channel
, &Available
)
4806 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4807 && !FD_ISSET (channel
, &non_process_wait_mask
))
4811 /* If waiting for this channel, arrange to return as
4812 soon as no more input to be processed. No more
4814 if (wait_channel
== channel
)
4820 proc
= chan_process
[channel
];
4824 /* If this is a server stream socket, accept connection. */
4825 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4827 server_accept_connection (proc
, channel
);
4831 /* Read data from the process, starting with our
4832 buffered-ahead character if we have one. */
4834 nread
= read_process_output (proc
, channel
);
4837 /* Since read_process_output can run a filter,
4838 which can call accept-process-output,
4839 don't try to read from any other processes
4840 before doing the select again. */
4841 FD_ZERO (&Available
);
4844 redisplay_preserve_echo_area (12);
4847 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4850 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4851 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4853 else if (nread
== -1 && errno
== EAGAIN
)
4857 else if (nread
== -1 && errno
== EAGAIN
)
4859 /* Note that we cannot distinguish between no input
4860 available now and a closed pipe.
4861 With luck, a closed pipe will be accompanied by
4862 subprocess termination and SIGCHLD. */
4863 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4865 #endif /* O_NDELAY */
4866 #endif /* O_NONBLOCK */
4868 /* On some OSs with ptys, when the process on one end of
4869 a pty exits, the other end gets an error reading with
4870 errno = EIO instead of getting an EOF (0 bytes read).
4871 Therefore, if we get an error reading and errno =
4872 EIO, just continue, because the child process has
4873 exited and should clean itself up soon (e.g. when we
4876 However, it has been known to happen that the SIGCHLD
4877 got lost. So raise the signal again just in case.
4879 else if (nread
== -1 && errno
== EIO
)
4881 struct Lisp_Process
*p
= XPROCESS (proc
);
4883 /* Clear the descriptor now, so we only raise the
4885 FD_CLR (channel
, &input_wait_mask
);
4886 FD_CLR (channel
, &non_keyboard_wait_mask
);
4890 /* If the EIO occurs on a pty, sigchld_handler's
4891 wait3() will not find the process object to
4892 delete. Do it here. */
4893 p
->tick
= ++process_tick
;
4894 p
->status
= Qfailed
;
4897 kill (getpid (), SIGCHLD
);
4899 #endif /* HAVE_PTYS */
4900 /* If we can detect process termination, don't consider the
4901 process gone just because its pipe is closed. */
4903 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4908 /* Preserve status of processes already terminated. */
4909 XPROCESS (proc
)->tick
= ++process_tick
;
4910 deactivate_process (proc
);
4911 if (XPROCESS (proc
)->raw_status_new
)
4912 update_status (XPROCESS (proc
));
4913 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4914 XPROCESS (proc
)->status
4915 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4918 #ifdef NON_BLOCKING_CONNECT
4919 if (FD_ISSET (channel
, &Writeok
)
4920 && FD_ISSET (channel
, &connect_wait_mask
))
4922 struct Lisp_Process
*p
;
4924 FD_CLR (channel
, &connect_wait_mask
);
4925 FD_CLR (channel
, &write_mask
);
4926 if (--num_pending_connects
< 0)
4929 proc
= chan_process
[channel
];
4933 p
= XPROCESS (proc
);
4936 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4937 So only use it on systems where it is known to work. */
4939 socklen_t xlen
= sizeof (xerrno
);
4940 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4945 struct sockaddr pname
;
4946 int pnamelen
= sizeof (pname
);
4948 /* If connection failed, getpeername will fail. */
4950 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4952 /* Obtain connect failure code through error slippage. */
4955 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4962 p
->tick
= ++process_tick
;
4963 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4964 deactivate_process (proc
);
4969 /* Execute the sentinel here. If we had relied on
4970 status_notify to do it later, it will read input
4971 from the process before calling the sentinel. */
4972 exec_sentinel (proc
, build_string ("open\n"));
4973 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4975 FD_SET (p
->infd
, &input_wait_mask
);
4976 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4980 #endif /* NON_BLOCKING_CONNECT */
4981 } /* end for each file descriptor */
4982 } /* end while exit conditions not met */
4984 unbind_to (count
, Qnil
);
4986 /* If calling from keyboard input, do not quit
4987 since we want to return C-g as an input character.
4988 Otherwise, do pending quit if requested. */
4991 /* Prevent input_pending from remaining set if we quit. */
4992 clear_input_pending ();
4996 return got_some_input
;
4999 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5002 read_process_output_call (Lisp_Object fun_and_args
)
5004 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5008 read_process_output_error_handler (Lisp_Object error_val
)
5010 cmd_error_internal (error_val
, "error in process filter: ");
5012 update_echo_area ();
5013 Fsleep_for (make_number (2), Qnil
);
5017 /* Read pending output from the process channel,
5018 starting with our buffered-ahead character if we have one.
5019 Yield number of decoded characters read.
5021 This function reads at most 4096 characters.
5022 If you want to read all available subprocess output,
5023 you must call it repeatedly until it returns zero.
5025 The characters read are decoded according to PROC's coding-system
5029 read_process_output (Lisp_Object proc
, register int channel
)
5031 register ssize_t nbytes
;
5033 register Lisp_Object outstream
;
5034 register struct Lisp_Process
*p
= XPROCESS (proc
);
5035 register ptrdiff_t opoint
;
5036 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5037 int carryover
= p
->decoding_carryover
;
5039 ptrdiff_t count
= SPECPDL_INDEX ();
5040 Lisp_Object odeactivate
;
5042 chars
= alloca (carryover
+ readmax
);
5044 /* See the comment above. */
5045 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5047 #ifdef DATAGRAM_SOCKETS
5048 /* We have a working select, so proc_buffered_char is always -1. */
5049 if (DATAGRAM_CHAN_P (channel
))
5051 socklen_t len
= datagram_address
[channel
].len
;
5052 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5053 0, datagram_address
[channel
].sa
, &len
);
5058 int buffered
= 0 <= proc_buffered_char
[channel
];
5061 chars
[carryover
] = proc_buffered_char
[channel
];
5062 proc_buffered_char
[channel
] = -1;
5066 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5067 readmax
- buffered
);
5070 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5071 readmax
- buffered
);
5072 #ifdef ADAPTIVE_READ_BUFFERING
5073 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5075 int delay
= p
->read_output_delay
;
5078 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5081 process_output_delay_count
++;
5082 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5085 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5087 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5089 process_output_delay_count
--;
5091 p
->read_output_delay
= delay
;
5094 p
->read_output_skip
= 1;
5095 process_output_skip
= 1;
5100 nbytes
+= buffered
&& nbytes
<= 0;
5103 p
->decoding_carryover
= 0;
5105 /* At this point, NBYTES holds number of bytes just received
5106 (including the one in proc_buffered_char[channel]). */
5109 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5111 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5114 /* Now set NBYTES how many bytes we must decode. */
5115 nbytes
+= carryover
;
5117 odeactivate
= Vdeactivate_mark
;
5118 /* There's no good reason to let process filters change the current
5119 buffer, and many callers of accept-process-output, sit-for, and
5120 friends don't expect current-buffer to be changed from under them. */
5121 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5123 /* Read and dispose of the process output. */
5124 outstream
= p
->filter
;
5125 if (!NILP (outstream
))
5128 int outer_running_asynch_code
= running_asynch_code
;
5129 int waiting
= waiting_for_user_input_p
;
5131 /* No need to gcpro these, because all we do with them later
5132 is test them for EQness, and none of them should be a string. */
5134 Lisp_Object obuffer
, okeymap
;
5135 XSETBUFFER (obuffer
, current_buffer
);
5136 okeymap
= BVAR (current_buffer
, keymap
);
5139 /* We inhibit quit here instead of just catching it so that
5140 hitting ^G when a filter happens to be running won't screw
5142 specbind (Qinhibit_quit
, Qt
);
5143 specbind (Qlast_nonmenu_event
, Qt
);
5145 /* In case we get recursively called,
5146 and we already saved the match data nonrecursively,
5147 save the same match data in safely recursive fashion. */
5148 if (outer_running_asynch_code
)
5151 /* Don't clobber the CURRENT match data, either! */
5152 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5153 restore_search_regs ();
5154 record_unwind_save_match_data ();
5155 Fset_match_data (tem
, Qt
);
5158 /* For speed, if a search happens within this code,
5159 save the match data in a special nonrecursive fashion. */
5160 running_asynch_code
= 1;
5162 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5163 text
= coding
->dst_object
;
5164 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5165 /* A new coding system might be found. */
5166 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5168 p
->decode_coding_system
= Vlast_coding_system_used
;
5170 /* Don't call setup_coding_system for
5171 proc_decode_coding_system[channel] here. It is done in
5172 detect_coding called via decode_coding above. */
5174 /* If a coding system for encoding is not yet decided, we set
5175 it as the same as coding-system for decoding.
5177 But, before doing that we must check if
5178 proc_encode_coding_system[p->outfd] surely points to a
5179 valid memory because p->outfd will be changed once EOF is
5180 sent to the process. */
5181 if (NILP (p
->encode_coding_system
)
5182 && proc_encode_coding_system
[p
->outfd
])
5184 p
->encode_coding_system
5185 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5186 setup_coding_system (p
->encode_coding_system
,
5187 proc_encode_coding_system
[p
->outfd
]);
5191 if (coding
->carryover_bytes
> 0)
5193 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5194 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5195 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5196 coding
->carryover_bytes
);
5197 p
->decoding_carryover
= coding
->carryover_bytes
;
5199 if (SBYTES (text
) > 0)
5200 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5201 sometimes it's simply wrong to wrap (e.g. when called from
5202 accept-process-output). */
5203 internal_condition_case_1 (read_process_output_call
,
5205 Fcons (proc
, Fcons (text
, Qnil
))),
5206 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5207 read_process_output_error_handler
);
5209 /* If we saved the match data nonrecursively, restore it now. */
5210 restore_search_regs ();
5211 running_asynch_code
= outer_running_asynch_code
;
5213 /* Restore waiting_for_user_input_p as it was
5214 when we were called, in case the filter clobbered it. */
5215 waiting_for_user_input_p
= waiting
;
5217 #if 0 /* Call record_asynch_buffer_change unconditionally,
5218 because we might have changed minor modes or other things
5219 that affect key bindings. */
5220 if (! EQ (Fcurrent_buffer (), obuffer
)
5221 || ! EQ (current_buffer
->keymap
, okeymap
))
5223 /* But do it only if the caller is actually going to read events.
5224 Otherwise there's no need to make him wake up, and it could
5225 cause trouble (for example it would make sit_for return). */
5226 if (waiting_for_user_input_p
== -1)
5227 record_asynch_buffer_change ();
5230 /* If no filter, write into buffer if it isn't dead. */
5231 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5233 Lisp_Object old_read_only
;
5234 ptrdiff_t old_begv
, old_zv
;
5235 ptrdiff_t old_begv_byte
, old_zv_byte
;
5236 ptrdiff_t before
, before_byte
;
5237 ptrdiff_t opoint_byte
;
5241 Fset_buffer (p
->buffer
);
5243 opoint_byte
= PT_BYTE
;
5244 old_read_only
= BVAR (current_buffer
, read_only
);
5247 old_begv_byte
= BEGV_BYTE
;
5248 old_zv_byte
= ZV_BYTE
;
5250 BVAR (current_buffer
, read_only
) = Qnil
;
5252 /* Insert new output into buffer
5253 at the current end-of-output marker,
5254 thus preserving logical ordering of input and output. */
5255 if (XMARKER (p
->mark
)->buffer
)
5256 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5257 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5260 SET_PT_BOTH (ZV
, ZV_BYTE
);
5262 before_byte
= PT_BYTE
;
5264 /* If the output marker is outside of the visible region, save
5265 the restriction and widen. */
5266 if (! (BEGV
<= PT
&& PT
<= ZV
))
5269 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5270 text
= coding
->dst_object
;
5271 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5272 /* A new coding system might be found. See the comment in the
5273 similar code in the previous `if' block. */
5274 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5276 p
->decode_coding_system
= Vlast_coding_system_used
;
5277 if (NILP (p
->encode_coding_system
)
5278 && proc_encode_coding_system
[p
->outfd
])
5280 p
->encode_coding_system
5281 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5282 setup_coding_system (p
->encode_coding_system
,
5283 proc_encode_coding_system
[p
->outfd
]);
5286 if (coding
->carryover_bytes
> 0)
5288 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5289 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5290 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5291 coding
->carryover_bytes
);
5292 p
->decoding_carryover
= coding
->carryover_bytes
;
5294 /* Adjust the multibyteness of TEXT to that of the buffer. */
5295 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5296 != ! STRING_MULTIBYTE (text
))
5297 text
= (STRING_MULTIBYTE (text
)
5298 ? Fstring_as_unibyte (text
)
5299 : Fstring_to_multibyte (text
));
5300 /* Insert before markers in case we are inserting where
5301 the buffer's mark is, and the user's next command is Meta-y. */
5302 insert_from_string_before_markers (text
, 0, 0,
5303 SCHARS (text
), SBYTES (text
), 0);
5305 /* Make sure the process marker's position is valid when the
5306 process buffer is changed in the signal_after_change above.
5307 W3 is known to do that. */
5308 if (BUFFERP (p
->buffer
)
5309 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5310 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5312 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5314 update_mode_lines
++;
5316 /* Make sure opoint and the old restrictions
5317 float ahead of any new text just as point would. */
5318 if (opoint
>= before
)
5320 opoint
+= PT
- before
;
5321 opoint_byte
+= PT_BYTE
- before_byte
;
5323 if (old_begv
> before
)
5325 old_begv
+= PT
- before
;
5326 old_begv_byte
+= PT_BYTE
- before_byte
;
5328 if (old_zv
>= before
)
5330 old_zv
+= PT
- before
;
5331 old_zv_byte
+= PT_BYTE
- before_byte
;
5334 /* If the restriction isn't what it should be, set it. */
5335 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5336 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5339 BVAR (current_buffer
, read_only
) = old_read_only
;
5340 SET_PT_BOTH (opoint
, opoint_byte
);
5342 /* Handling the process output should not deactivate the mark. */
5343 Vdeactivate_mark
= odeactivate
;
5345 unbind_to (count
, Qnil
);
5349 /* Sending data to subprocess */
5351 static jmp_buf send_process_frame
;
5352 static Lisp_Object process_sent_to
;
5354 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5355 static _Noreturn
void send_process_trap (int);
5359 send_process_trap (int ignore
)
5361 SIGNAL_THREAD_CHECK (SIGPIPE
);
5362 sigunblock (sigmask (SIGPIPE
));
5363 longjmp (send_process_frame
, 1);
5366 /* In send_process, when a write fails temporarily,
5367 wait_reading_process_output is called. It may execute user code,
5368 e.g. timers, that attempts to write new data to the same process.
5369 We must ensure that data is sent in the right order, and not
5370 interspersed half-completed with other writes (Bug#10815). This is
5371 handled by the write_queue element of struct process. It is a list
5372 with each entry having the form
5374 (string . (offset . length))
5376 where STRING is a lisp string, OFFSET is the offset into the
5377 string's byte sequence from which we should begin to send, and
5378 LENGTH is the number of bytes left to send. */
5380 /* Create a new entry in write_queue.
5381 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5382 BUF is a pointer to the string sequence of the input_obj or a C
5383 string in case of Qt or Qnil. */
5386 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5387 const char *buf
, ptrdiff_t len
, int front
)
5390 Lisp_Object entry
, obj
;
5392 if (STRINGP (input_obj
))
5394 offset
= buf
- SSDATA (input_obj
);
5400 obj
= make_unibyte_string (buf
, len
);
5403 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5406 p
->write_queue
= Fcons (entry
, p
->write_queue
);
5408 p
->write_queue
= nconc2 (p
->write_queue
, Fcons (entry
, Qnil
));
5411 /* Remove the first element in the write_queue of process P, put its
5412 contents in OBJ, BUF and LEN, and return non-zero. If the
5413 write_queue is empty, return zero. */
5416 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5417 const char **buf
, ptrdiff_t *len
)
5419 Lisp_Object entry
, offset_length
;
5422 if (NILP (p
->write_queue
))
5425 entry
= XCAR (p
->write_queue
);
5426 p
->write_queue
= XCDR (p
->write_queue
);
5428 *obj
= XCAR (entry
);
5429 offset_length
= XCDR (entry
);
5431 *len
= XINT (XCDR (offset_length
));
5432 offset
= XINT (XCAR (offset_length
));
5433 *buf
= SSDATA (*obj
) + offset
;
5438 /* Send some data to process PROC.
5439 BUF is the beginning of the data; LEN is the number of characters.
5440 OBJECT is the Lisp object that the data comes from. If OBJECT is
5441 nil or t, it means that the data comes from C string.
5443 If OBJECT is not nil, the data is encoded by PROC's coding-system
5444 for encoding before it is sent.
5446 This function can evaluate Lisp code and can garbage collect. */
5449 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5450 volatile ptrdiff_t len
, volatile Lisp_Object object
)
5452 /* Use volatile to protect variables from being clobbered by longjmp. */
5453 struct Lisp_Process
*p
= XPROCESS (proc
);
5455 struct coding_system
*coding
;
5456 void (*volatile old_sigpipe
) (int);
5458 if (p
->raw_status_new
)
5460 if (! EQ (p
->status
, Qrun
))
5461 error ("Process %s not running", SDATA (p
->name
));
5463 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5465 coding
= proc_encode_coding_system
[p
->outfd
];
5466 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5468 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5469 || (BUFFERP (object
)
5470 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5473 p
->encode_coding_system
5474 = complement_process_encoding_system (p
->encode_coding_system
);
5475 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5477 /* The coding system for encoding was changed to raw-text
5478 because we sent a unibyte text previously. Now we are
5479 sending a multibyte text, thus we must encode it by the
5480 original coding system specified for the current process.
5482 Another reason we come here is that the coding system
5483 was just complemented and a new one was returned by
5484 complement_process_encoding_system. */
5485 setup_coding_system (p
->encode_coding_system
, coding
);
5486 Vlast_coding_system_used
= p
->encode_coding_system
;
5488 coding
->src_multibyte
= 1;
5492 coding
->src_multibyte
= 0;
5493 /* For sending a unibyte text, character code conversion should
5494 not take place but EOL conversion should. So, setup raw-text
5495 or one of the subsidiary if we have not yet done it. */
5496 if (CODING_REQUIRE_ENCODING (coding
))
5498 if (CODING_REQUIRE_FLUSHING (coding
))
5500 /* But, before changing the coding, we must flush out data. */
5501 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5502 send_process (proc
, "", 0, Qt
);
5503 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5505 setup_coding_system (raw_text_coding_system
5506 (Vlast_coding_system_used
),
5508 coding
->src_multibyte
= 0;
5511 coding
->dst_multibyte
= 0;
5513 if (CODING_REQUIRE_ENCODING (coding
))
5515 coding
->dst_object
= Qt
;
5516 if (BUFFERP (object
))
5518 ptrdiff_t from_byte
, from
, to
;
5519 ptrdiff_t save_pt
, save_pt_byte
;
5520 struct buffer
*cur
= current_buffer
;
5522 set_buffer_internal (XBUFFER (object
));
5523 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5525 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5526 from
= BYTE_TO_CHAR (from_byte
);
5527 to
= BYTE_TO_CHAR (from_byte
+ len
);
5528 TEMP_SET_PT_BOTH (from
, from_byte
);
5529 encode_coding_object (coding
, object
, from
, from_byte
,
5530 to
, from_byte
+ len
, Qt
);
5531 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5532 set_buffer_internal (cur
);
5534 else if (STRINGP (object
))
5536 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5537 SBYTES (object
), Qt
);
5541 coding
->dst_object
= make_unibyte_string (buf
, len
);
5542 coding
->produced
= len
;
5545 len
= coding
->produced
;
5546 object
= coding
->dst_object
;
5547 buf
= SSDATA (object
);
5550 if (pty_max_bytes
== 0)
5552 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5553 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5554 if (pty_max_bytes
< 0)
5555 pty_max_bytes
= 250;
5557 pty_max_bytes
= 250;
5559 /* Deduct one, to leave space for the eof. */
5563 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5564 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5565 when returning with longjmp despite being declared volatile. */
5566 if (!setjmp (send_process_frame
))
5568 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5569 process_sent_to
= proc
;
5571 /* If there is already data in the write_queue, put the new data
5572 in the back of queue. Otherwise, ignore it. */
5573 if (!NILP (p
->write_queue
))
5574 write_queue_push (p
, object
, buf
, len
, 0);
5576 do /* while !NILP (p->write_queue) */
5578 ptrdiff_t cur_len
= -1;
5579 const char *cur_buf
;
5580 Lisp_Object cur_object
;
5582 /* If write_queue is empty, ignore it. */
5583 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5587 cur_object
= object
;
5592 /* Send this batch, using one or more write calls. */
5593 ptrdiff_t written
= 0;
5594 int outfd
= p
->outfd
;
5595 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5596 #ifdef DATAGRAM_SOCKETS
5597 if (DATAGRAM_CHAN_P (outfd
))
5599 rv
= sendto (outfd
, cur_buf
, cur_len
,
5600 0, datagram_address
[outfd
].sa
,
5601 datagram_address
[outfd
].len
);
5604 else if (errno
== EMSGSIZE
)
5606 signal (SIGPIPE
, old_sigpipe
);
5607 report_file_error ("sending datagram",
5608 Fcons (proc
, Qnil
));
5616 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5619 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5620 rv
= (written
? 0 : -1);
5621 #ifdef ADAPTIVE_READ_BUFFERING
5622 if (p
->read_output_delay
> 0
5623 && p
->adaptive_read_buffering
== 1)
5625 p
->read_output_delay
= 0;
5626 process_output_delay_count
--;
5627 p
->read_output_skip
= 0;
5631 signal (SIGPIPE
, old_sigpipe
);
5637 || errno
== EWOULDBLOCK
5643 /* Buffer is full. Wait, accepting input;
5644 that may allow the program
5645 to finish doing output and read more. */
5647 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5648 /* A gross hack to work around a bug in FreeBSD.
5649 In the following sequence, read(2) returns
5653 write(2) 954 bytes, get EAGAIN
5654 read(2) 1024 bytes in process_read_output
5655 read(2) 11 bytes in process_read_output
5657 That is, read(2) returns more bytes than have
5658 ever been written successfully. The 1033 bytes
5659 read are the 1022 bytes written successfully
5660 after processing (for example with CRs added if
5661 the terminal is set up that way which it is
5662 here). The same bytes will be seen again in a
5663 later read(2), without the CRs. */
5665 if (errno
== EAGAIN
)
5668 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5670 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5672 /* Put what we should have written in wait_queue. */
5673 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5674 wait_reading_process_output (0, 20 * 1000 * 1000,
5675 0, 0, Qnil
, NULL
, 0);
5676 /* Reread queue, to see what is left. */
5680 /* This is a real error. */
5681 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5687 while (!NILP (p
->write_queue
));
5691 signal (SIGPIPE
, old_sigpipe
);
5692 proc
= process_sent_to
;
5693 p
= XPROCESS (proc
);
5694 p
->raw_status_new
= 0;
5695 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5696 p
->tick
= ++process_tick
;
5697 deactivate_process (proc
);
5698 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5702 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5704 doc
: /* Send current contents of region as input to PROCESS.
5705 PROCESS may be a process, a buffer, the name of a process or buffer, or
5706 nil, indicating the current buffer's process.
5707 Called from program, takes three arguments, PROCESS, START and END.
5708 If the region is more than 500 characters long,
5709 it is sent in several bunches. This may happen even for shorter regions.
5710 Output from processes can arrive in between bunches. */)
5711 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5714 ptrdiff_t start1
, end1
;
5716 proc
= get_process (process
);
5717 validate_region (&start
, &end
);
5719 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5720 move_gap (XINT (start
));
5722 start1
= CHAR_TO_BYTE (XINT (start
));
5723 end1
= CHAR_TO_BYTE (XINT (end
));
5724 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5725 Fcurrent_buffer ());
5730 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5732 doc
: /* Send PROCESS the contents of STRING as input.
5733 PROCESS may be a process, a buffer, the name of a process or buffer, or
5734 nil, indicating the current buffer's process.
5735 If STRING is more than 500 characters long,
5736 it is sent in several bunches. This may happen even for shorter strings.
5737 Output from processes can arrive in between bunches. */)
5738 (Lisp_Object process
, Lisp_Object string
)
5741 CHECK_STRING (string
);
5742 proc
= get_process (process
);
5743 send_process (proc
, SSDATA (string
),
5744 SBYTES (string
), string
);
5748 /* Return the foreground process group for the tty/pty that
5749 the process P uses. */
5751 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5756 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5759 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5760 master side. Try the slave side. */
5761 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5765 ioctl (fd
, TIOCGPGRP
, &gid
);
5769 #endif /* defined (TIOCGPGRP ) */
5774 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5775 Sprocess_running_child_p
, 0, 1, 0,
5776 doc
: /* Return t if PROCESS has given the terminal to a child.
5777 If the operating system does not make it possible to find out,
5778 return t unconditionally. */)
5779 (Lisp_Object process
)
5781 /* Initialize in case ioctl doesn't exist or gives an error,
5782 in a way that will cause returning t. */
5785 struct Lisp_Process
*p
;
5787 proc
= get_process (process
);
5788 p
= XPROCESS (proc
);
5790 if (!EQ (p
->type
, Qreal
))
5791 error ("Process %s is not a subprocess",
5794 error ("Process %s is not active",
5797 gid
= emacs_get_tty_pgrp (p
);
5804 /* send a signal number SIGNO to PROCESS.
5805 If CURRENT_GROUP is t, that means send to the process group
5806 that currently owns the terminal being used to communicate with PROCESS.
5807 This is used for various commands in shell mode.
5808 If CURRENT_GROUP is lambda, that means send to the process group
5809 that currently owns the terminal, but only if it is NOT the shell itself.
5811 If NOMSG is zero, insert signal-announcements into process's buffers
5814 If we can, we try to signal PROCESS by sending control characters
5815 down the pty. This allows us to signal inferiors who have changed
5816 their uid, for which killpg would return an EPERM error. */
5819 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5823 register struct Lisp_Process
*p
;
5827 proc
= get_process (process
);
5828 p
= XPROCESS (proc
);
5830 if (!EQ (p
->type
, Qreal
))
5831 error ("Process %s is not a subprocess",
5834 error ("Process %s is not active",
5838 current_group
= Qnil
;
5840 /* If we are using pgrps, get a pgrp number and make it negative. */
5841 if (NILP (current_group
))
5842 /* Send the signal to the shell's process group. */
5846 #ifdef SIGNALS_VIA_CHARACTERS
5847 /* If possible, send signals to the entire pgrp
5848 by sending an input character to it. */
5851 cc_t
*sig_char
= NULL
;
5853 tcgetattr (p
->infd
, &t
);
5858 sig_char
= &t
.c_cc
[VINTR
];
5862 sig_char
= &t
.c_cc
[VQUIT
];
5866 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5867 sig_char
= &t
.c_cc
[VSWTCH
];
5869 sig_char
= &t
.c_cc
[VSUSP
];
5874 if (sig_char
&& *sig_char
!= CDISABLE
)
5876 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5879 /* If we can't send the signal with a character,
5880 fall through and send it another way. */
5882 /* The code above may fall through if it can't
5883 handle the signal. */
5884 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5887 /* Get the current pgrp using the tty itself, if we have that.
5888 Otherwise, use the pty to get the pgrp.
5889 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5890 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5891 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5892 His patch indicates that if TIOCGPGRP returns an error, then
5893 we should just assume that p->pid is also the process group id. */
5895 gid
= emacs_get_tty_pgrp (p
);
5898 /* If we can't get the information, assume
5899 the shell owns the tty. */
5902 /* It is not clear whether anything really can set GID to -1.
5903 Perhaps on some system one of those ioctls can or could do so.
5904 Or perhaps this is vestigial. */
5907 #else /* ! defined (TIOCGPGRP ) */
5908 /* Can't select pgrps on this system, so we know that
5909 the child itself heads the pgrp. */
5911 #endif /* ! defined (TIOCGPGRP ) */
5913 /* If current_group is lambda, and the shell owns the terminal,
5914 don't send any signal. */
5915 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5923 p
->raw_status_new
= 0;
5925 p
->tick
= ++process_tick
;
5928 status_notify (NULL
);
5929 redisplay_preserve_echo_area (13);
5932 #endif /* ! defined (SIGCONT) */
5936 flush_pending_output (p
->infd
);
5940 /* If we don't have process groups, send the signal to the immediate
5941 subprocess. That isn't really right, but it's better than any
5942 obvious alternative. */
5945 kill (p
->pid
, signo
);
5949 /* gid may be a pid, or minus a pgrp's number */
5951 if (!NILP (current_group
))
5953 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5954 EMACS_KILLPG (gid
, signo
);
5961 #else /* ! defined (TIOCSIGSEND) */
5962 EMACS_KILLPG (gid
, signo
);
5963 #endif /* ! defined (TIOCSIGSEND) */
5966 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5967 doc
: /* Interrupt process PROCESS.
5968 PROCESS may be a process, a buffer, or the name of a process or buffer.
5969 No arg or nil means current buffer's process.
5970 Second arg CURRENT-GROUP non-nil means send signal to
5971 the current process-group of the process's controlling terminal
5972 rather than to the process's own process group.
5973 If the process is a shell, this means interrupt current subjob
5974 rather than the shell.
5976 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5977 don't send the signal. */)
5978 (Lisp_Object process
, Lisp_Object current_group
)
5980 process_send_signal (process
, SIGINT
, current_group
, 0);
5984 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5985 doc
: /* Kill process PROCESS. May be process or name of one.
5986 See function `interrupt-process' for more details on usage. */)
5987 (Lisp_Object process
, Lisp_Object current_group
)
5989 process_send_signal (process
, SIGKILL
, current_group
, 0);
5993 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5994 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5995 See function `interrupt-process' for more details on usage. */)
5996 (Lisp_Object process
, Lisp_Object current_group
)
5998 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6002 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6003 doc
: /* Stop process PROCESS. May be process or name of one.
6004 See function `interrupt-process' for more details on usage.
6005 If PROCESS is a network or serial process, inhibit handling of incoming
6007 (Lisp_Object process
, Lisp_Object current_group
)
6009 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6011 struct Lisp_Process
*p
;
6013 p
= XPROCESS (process
);
6014 if (NILP (p
->command
)
6017 FD_CLR (p
->infd
, &input_wait_mask
);
6018 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6024 error ("No SIGTSTP support");
6026 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6031 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6032 doc
: /* Continue process PROCESS. May be process or name of one.
6033 See function `interrupt-process' for more details on usage.
6034 If PROCESS is a network or serial process, resume handling of incoming
6036 (Lisp_Object process
, Lisp_Object current_group
)
6038 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6040 struct Lisp_Process
*p
;
6042 p
= XPROCESS (process
);
6043 if (EQ (p
->command
, Qt
)
6045 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6047 FD_SET (p
->infd
, &input_wait_mask
);
6048 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6050 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6051 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6052 #else /* not WINDOWSNT */
6053 tcflush (p
->infd
, TCIFLUSH
);
6054 #endif /* not WINDOWSNT */
6060 process_send_signal (process
, SIGCONT
, current_group
, 0);
6062 error ("No SIGCONT support");
6067 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6068 2, 2, "sProcess (name or number): \nnSignal code: ",
6069 doc
: /* Send PROCESS the signal with code SIGCODE.
6070 PROCESS may also be a number specifying the process id of the
6071 process to signal; in this case, the process need not be a child of
6073 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6074 (Lisp_Object process
, Lisp_Object sigcode
)
6078 if (STRINGP (process
))
6080 Lisp_Object tem
= Fget_process (process
);
6083 Lisp_Object process_number
=
6084 string_to_number (SSDATA (process
), 10, 1);
6085 if (INTEGERP (process_number
) || FLOATP (process_number
))
6086 tem
= process_number
;
6090 else if (!NUMBERP (process
))
6091 process
= get_process (process
);
6096 if (NUMBERP (process
))
6097 CONS_TO_INTEGER (process
, pid_t
, pid
);
6100 CHECK_PROCESS (process
);
6101 pid
= XPROCESS (process
)->pid
;
6103 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6106 #define parse_signal(NAME, VALUE) \
6107 else if (!xstrcasecmp (name, NAME)) \
6108 XSETINT (sigcode, VALUE)
6110 if (INTEGERP (sigcode
))
6111 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6116 CHECK_SYMBOL (sigcode
);
6117 name
= SSDATA (SYMBOL_NAME (sigcode
));
6119 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6125 parse_signal ("usr1", SIGUSR1
);
6128 parse_signal ("usr2", SIGUSR2
);
6131 parse_signal ("term", SIGTERM
);
6134 parse_signal ("hup", SIGHUP
);
6137 parse_signal ("int", SIGINT
);
6140 parse_signal ("quit", SIGQUIT
);
6143 parse_signal ("ill", SIGILL
);
6146 parse_signal ("abrt", SIGABRT
);
6149 parse_signal ("emt", SIGEMT
);
6152 parse_signal ("kill", SIGKILL
);
6155 parse_signal ("fpe", SIGFPE
);
6158 parse_signal ("bus", SIGBUS
);
6161 parse_signal ("segv", SIGSEGV
);
6164 parse_signal ("sys", SIGSYS
);
6167 parse_signal ("pipe", SIGPIPE
);
6170 parse_signal ("alrm", SIGALRM
);
6173 parse_signal ("urg", SIGURG
);
6176 parse_signal ("stop", SIGSTOP
);
6179 parse_signal ("tstp", SIGTSTP
);
6182 parse_signal ("cont", SIGCONT
);
6185 parse_signal ("chld", SIGCHLD
);
6188 parse_signal ("ttin", SIGTTIN
);
6191 parse_signal ("ttou", SIGTTOU
);
6194 parse_signal ("io", SIGIO
);
6197 parse_signal ("xcpu", SIGXCPU
);
6200 parse_signal ("xfsz", SIGXFSZ
);
6203 parse_signal ("vtalrm", SIGVTALRM
);
6206 parse_signal ("prof", SIGPROF
);
6209 parse_signal ("winch", SIGWINCH
);
6212 parse_signal ("info", SIGINFO
);
6215 error ("Undefined signal name %s", name
);
6220 return make_number (kill (pid
, XINT (sigcode
)));
6223 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6224 doc
: /* Make PROCESS see end-of-file in its input.
6225 EOF comes after any text already sent to it.
6226 PROCESS may be a process, a buffer, the name of a process or buffer, or
6227 nil, indicating the current buffer's process.
6228 If PROCESS is a network connection, or is a process communicating
6229 through a pipe (as opposed to a pty), then you cannot send any more
6230 text to PROCESS after you call this function.
6231 If PROCESS is a serial process, wait until all output written to the
6232 process has been transmitted to the serial port. */)
6233 (Lisp_Object process
)
6236 struct coding_system
*coding
;
6238 if (DATAGRAM_CONN_P (process
))
6241 proc
= get_process (process
);
6242 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6244 /* Make sure the process is really alive. */
6245 if (XPROCESS (proc
)->raw_status_new
)
6246 update_status (XPROCESS (proc
));
6247 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6248 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6250 if (CODING_REQUIRE_FLUSHING (coding
))
6252 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6253 send_process (proc
, "", 0, Qnil
);
6256 if (XPROCESS (proc
)->pty_flag
)
6257 send_process (proc
, "\004", 1, Qnil
);
6258 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6261 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6262 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6263 #endif /* not WINDOWSNT */
6264 /* Do nothing on Windows because writes are blocking. */
6268 int old_outfd
, new_outfd
;
6270 #ifdef HAVE_SHUTDOWN
6271 /* If this is a network connection, or socketpair is used
6272 for communication with the subprocess, call shutdown to cause EOF.
6273 (In some old system, shutdown to socketpair doesn't work.
6274 Then we just can't win.) */
6275 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6276 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6277 shutdown (XPROCESS (proc
)->outfd
, 1);
6278 /* In case of socketpair, outfd == infd, so don't close it. */
6279 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6280 emacs_close (XPROCESS (proc
)->outfd
);
6281 #else /* not HAVE_SHUTDOWN */
6282 emacs_close (XPROCESS (proc
)->outfd
);
6283 #endif /* not HAVE_SHUTDOWN */
6284 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6287 old_outfd
= XPROCESS (proc
)->outfd
;
6289 if (!proc_encode_coding_system
[new_outfd
])
6290 proc_encode_coding_system
[new_outfd
]
6291 = xmalloc (sizeof (struct coding_system
));
6292 memcpy (proc_encode_coding_system
[new_outfd
],
6293 proc_encode_coding_system
[old_outfd
],
6294 sizeof (struct coding_system
));
6295 memset (proc_encode_coding_system
[old_outfd
], 0,
6296 sizeof (struct coding_system
));
6298 XPROCESS (proc
)->outfd
= new_outfd
;
6303 /* On receipt of a signal that a child status has changed, loop asking
6304 about children with changed statuses until the system says there
6307 All we do is change the status; we do not run sentinels or print
6308 notifications. That is saved for the next time keyboard input is
6309 done, in order to avoid timing errors.
6311 ** WARNING: this can be called during garbage collection.
6312 Therefore, it must not be fooled by the presence of mark bits in
6315 ** USG WARNING: Although it is not obvious from the documentation
6316 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6317 signal() before executing at least one wait(), otherwise the
6318 handler will be called again, resulting in an infinite loop. The
6319 relevant portion of the documentation reads "SIGCLD signals will be
6320 queued and the signal-catching function will be continually
6321 reentered until the queue is empty". Invoking signal() causes the
6322 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6325 ** Malloc WARNING: This should never call malloc either directly or
6326 indirectly; if it does, that is a bug */
6330 sigchld_handler (int signo
)
6332 int old_errno
= errno
;
6334 struct Lisp_Process
*p
;
6336 SIGNAL_THREAD_CHECK (signo
);
6347 #endif /* no WUNTRACED */
6348 /* Keep trying to get a status until we get a definitive result. */
6352 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6354 while (pid
< 0 && errno
== EINTR
);
6358 /* PID == 0 means no processes found, PID == -1 means a real
6359 failure. We have done all our job, so return. */
6366 #endif /* no WNOHANG */
6368 /* Find the process that signaled us, and record its status. */
6370 /* The process can have been deleted by Fdelete_process. */
6371 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6373 Lisp_Object xpid
= XCAR (tail
);
6374 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6375 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6377 XSETCAR (tail
, Qnil
);
6378 goto sigchld_end_of_loop
;
6382 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6384 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6386 proc
= XCDR (XCAR (tail
));
6387 p
= XPROCESS (proc
);
6388 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6393 /* Look for an asynchronous process whose pid hasn't been filled
6396 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6398 proc
= XCDR (XCAR (tail
));
6399 p
= XPROCESS (proc
);
6405 /* Change the status of the process that was found. */
6408 int clear_desc_flag
= 0;
6410 p
->tick
= ++process_tick
;
6412 p
->raw_status_new
= 1;
6414 /* If process has terminated, stop waiting for its output. */
6415 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6417 clear_desc_flag
= 1;
6419 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6420 if (clear_desc_flag
)
6422 FD_CLR (p
->infd
, &input_wait_mask
);
6423 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6426 /* Tell wait_reading_process_output that it needs to wake up and
6428 if (input_available_clear_time
)
6429 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6432 /* There was no asynchronous process found for that pid: we have
6433 a synchronous process. */
6436 synch_process_alive
= 0;
6438 /* Report the status of the synchronous process. */
6440 synch_process_retcode
= WRETCODE (w
);
6441 else if (WIFSIGNALED (w
))
6442 synch_process_termsig
= WTERMSIG (w
);
6444 /* Tell wait_reading_process_output that it needs to wake up and
6446 if (input_available_clear_time
)
6447 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6450 sigchld_end_of_loop
:
6453 /* On some systems, we must return right away.
6454 If any more processes want to signal us, we will
6456 Otherwise (on systems that have WNOHANG), loop around
6457 to use up all the processes that have something to tell us. */
6458 #if (defined WINDOWSNT \
6459 || (defined USG && !defined GNU_LINUX \
6460 && !(defined HPUX && defined WNOHANG)))
6463 #endif /* USG, but not HPUX with WNOHANG */
6466 #endif /* SIGCHLD */
6470 exec_sentinel_unwind (Lisp_Object data
)
6472 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6477 exec_sentinel_error_handler (Lisp_Object error_val
)
6479 cmd_error_internal (error_val
, "error in process sentinel: ");
6481 update_echo_area ();
6482 Fsleep_for (make_number (2), Qnil
);
6487 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6489 Lisp_Object sentinel
, odeactivate
;
6490 register struct Lisp_Process
*p
= XPROCESS (proc
);
6491 ptrdiff_t count
= SPECPDL_INDEX ();
6492 int outer_running_asynch_code
= running_asynch_code
;
6493 int waiting
= waiting_for_user_input_p
;
6495 if (inhibit_sentinels
)
6498 /* No need to gcpro these, because all we do with them later
6499 is test them for EQness, and none of them should be a string. */
6500 odeactivate
= Vdeactivate_mark
;
6502 Lisp_Object obuffer
, okeymap
;
6503 XSETBUFFER (obuffer
, current_buffer
);
6504 okeymap
= BVAR (current_buffer
, keymap
);
6507 /* There's no good reason to let sentinels change the current
6508 buffer, and many callers of accept-process-output, sit-for, and
6509 friends don't expect current-buffer to be changed from under them. */
6510 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6512 sentinel
= p
->sentinel
;
6513 if (NILP (sentinel
))
6516 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6517 assure that it gets restored no matter how the sentinel exits. */
6519 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6520 /* Inhibit quit so that random quits don't screw up a running filter. */
6521 specbind (Qinhibit_quit
, Qt
);
6522 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6524 /* In case we get recursively called,
6525 and we already saved the match data nonrecursively,
6526 save the same match data in safely recursive fashion. */
6527 if (outer_running_asynch_code
)
6530 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6531 restore_search_regs ();
6532 record_unwind_save_match_data ();
6533 Fset_match_data (tem
, Qt
);
6536 /* For speed, if a search happens within this code,
6537 save the match data in a special nonrecursive fashion. */
6538 running_asynch_code
= 1;
6540 internal_condition_case_1 (read_process_output_call
,
6542 Fcons (proc
, Fcons (reason
, Qnil
))),
6543 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6544 exec_sentinel_error_handler
);
6546 /* If we saved the match data nonrecursively, restore it now. */
6547 restore_search_regs ();
6548 running_asynch_code
= outer_running_asynch_code
;
6550 Vdeactivate_mark
= odeactivate
;
6552 /* Restore waiting_for_user_input_p as it was
6553 when we were called, in case the filter clobbered it. */
6554 waiting_for_user_input_p
= waiting
;
6557 if (! EQ (Fcurrent_buffer (), obuffer
)
6558 || ! EQ (current_buffer
->keymap
, okeymap
))
6560 /* But do it only if the caller is actually going to read events.
6561 Otherwise there's no need to make him wake up, and it could
6562 cause trouble (for example it would make sit_for return). */
6563 if (waiting_for_user_input_p
== -1)
6564 record_asynch_buffer_change ();
6566 unbind_to (count
, Qnil
);
6569 /* Report all recent events of a change in process status
6570 (either run the sentinel or output a message).
6571 This is usually done while Emacs is waiting for keyboard input
6572 but can be done at other times. */
6575 status_notify (struct Lisp_Process
*deleting_process
)
6577 register Lisp_Object proc
, buffer
;
6578 Lisp_Object tail
, msg
;
6579 struct gcpro gcpro1
, gcpro2
;
6583 /* We need to gcpro tail; if read_process_output calls a filter
6584 which deletes a process and removes the cons to which tail points
6585 from Vprocess_alist, and then causes a GC, tail is an unprotected
6589 /* Set this now, so that if new processes are created by sentinels
6590 that we run, we get called again to handle their status changes. */
6591 update_tick
= process_tick
;
6593 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6596 register struct Lisp_Process
*p
;
6598 proc
= Fcdr (XCAR (tail
));
6599 p
= XPROCESS (proc
);
6601 if (p
->tick
!= p
->update_tick
)
6603 p
->update_tick
= p
->tick
;
6605 /* If process is still active, read any output that remains. */
6606 while (! EQ (p
->filter
, Qt
)
6607 && ! EQ (p
->status
, Qconnect
)
6608 && ! EQ (p
->status
, Qlisten
)
6609 /* Network or serial process not stopped: */
6610 && ! EQ (p
->command
, Qt
)
6612 && p
!= deleting_process
6613 && read_process_output (proc
, p
->infd
) > 0);
6617 /* Get the text to use for the message. */
6618 if (p
->raw_status_new
)
6620 msg
= status_message (p
);
6622 /* If process is terminated, deactivate it or delete it. */
6624 if (CONSP (p
->status
))
6625 symbol
= XCAR (p
->status
);
6627 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6628 || EQ (symbol
, Qclosed
))
6630 if (delete_exited_processes
)
6631 remove_process (proc
);
6633 deactivate_process (proc
);
6636 /* The actions above may have further incremented p->tick.
6637 So set p->update_tick again
6638 so that an error in the sentinel will not cause
6639 this code to be run again. */
6640 p
->update_tick
= p
->tick
;
6641 /* Now output the message suitably. */
6642 if (!NILP (p
->sentinel
))
6643 exec_sentinel (proc
, msg
);
6644 /* Don't bother with a message in the buffer
6645 when a process becomes runnable. */
6646 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6649 struct buffer
*old
= current_buffer
;
6650 ptrdiff_t opoint
, opoint_byte
;
6651 ptrdiff_t before
, before_byte
;
6653 /* Avoid error if buffer is deleted
6654 (probably that's why the process is dead, too) */
6655 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6657 Fset_buffer (buffer
);
6660 opoint_byte
= PT_BYTE
;
6661 /* Insert new output into buffer
6662 at the current end-of-output marker,
6663 thus preserving logical ordering of input and output. */
6664 if (XMARKER (p
->mark
)->buffer
)
6665 Fgoto_char (p
->mark
);
6667 SET_PT_BOTH (ZV
, ZV_BYTE
);
6670 before_byte
= PT_BYTE
;
6672 tem
= BVAR (current_buffer
, read_only
);
6673 BVAR (current_buffer
, read_only
) = Qnil
;
6674 insert_string ("\nProcess ");
6675 Finsert (1, &p
->name
);
6676 insert_string (" ");
6678 BVAR (current_buffer
, read_only
) = tem
;
6679 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6681 if (opoint
>= before
)
6682 SET_PT_BOTH (opoint
+ (PT
- before
),
6683 opoint_byte
+ (PT_BYTE
- before_byte
));
6685 SET_PT_BOTH (opoint
, opoint_byte
);
6687 set_buffer_internal (old
);
6692 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6697 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6698 Sset_process_coding_system
, 1, 3, 0,
6699 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6700 DECODING will be used to decode subprocess output and ENCODING to
6701 encode subprocess input. */)
6702 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6704 register struct Lisp_Process
*p
;
6706 CHECK_PROCESS (process
);
6707 p
= XPROCESS (process
);
6709 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6711 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6712 Fcheck_coding_system (decoding
);
6713 Fcheck_coding_system (encoding
);
6714 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6715 p
->decode_coding_system
= decoding
;
6716 p
->encode_coding_system
= encoding
;
6717 setup_process_coding_systems (process
);
6722 DEFUN ("process-coding-system",
6723 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6724 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6725 (register Lisp_Object process
)
6727 CHECK_PROCESS (process
);
6728 return Fcons (XPROCESS (process
)->decode_coding_system
,
6729 XPROCESS (process
)->encode_coding_system
);
6732 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6733 Sset_process_filter_multibyte
, 2, 2, 0,
6734 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6735 If FLAG is non-nil, the filter is given multibyte strings.
6736 If FLAG is nil, the filter is given unibyte strings. In this case,
6737 all character code conversion except for end-of-line conversion is
6739 (Lisp_Object process
, Lisp_Object flag
)
6741 register struct Lisp_Process
*p
;
6743 CHECK_PROCESS (process
);
6744 p
= XPROCESS (process
);
6746 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6747 setup_process_coding_systems (process
);
6752 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6753 Sprocess_filter_multibyte_p
, 1, 1, 0,
6754 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6755 (Lisp_Object process
)
6757 register struct Lisp_Process
*p
;
6758 struct coding_system
*coding
;
6760 CHECK_PROCESS (process
);
6761 p
= XPROCESS (process
);
6762 coding
= proc_decode_coding_system
[p
->infd
];
6763 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6772 add_gpm_wait_descriptor (int desc
)
6774 add_keyboard_wait_descriptor (desc
);
6778 delete_gpm_wait_descriptor (int desc
)
6780 delete_keyboard_wait_descriptor (desc
);
6787 /* Return nonzero if *MASK has a bit set
6788 that corresponds to one of the keyboard input descriptors. */
6791 keyboard_bit_set (fd_set
*mask
)
6795 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6796 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6797 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6804 #else /* not subprocesses */
6806 /* Defined on msdos.c. */
6807 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6808 EMACS_TIME
*, void *);
6810 /* Implementation of wait_reading_process_output, assuming that there
6811 are no subprocesses. Used only by the MS-DOS build.
6813 Wait for timeout to elapse and/or keyboard input to be available.
6817 If negative, gobble data immediately available but don't wait for any.
6820 an additional duration to wait, measured in nanoseconds
6821 If TIME_LIMIT is zero, then:
6822 If NSECS == 0, there is no limit.
6823 If NSECS > 0, the timeout consists of NSECS only.
6824 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6827 0 to ignore keyboard input, or
6828 1 to return when input is available, or
6829 -1 means caller will actually read the input, so don't throw to
6832 see full version for other parameters. We know that wait_proc will
6833 always be NULL, since `subprocesses' isn't defined.
6835 DO_DISPLAY != 0 means redisplay should be done to show subprocess
6836 output that arrives.
6838 Return true if we received input from any process. */
6841 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6843 Lisp_Object wait_for_cell
,
6844 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6847 EMACS_TIME end_time
, timeout
;
6854 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6855 time_limit
= TYPE_MAXIMUM (time_t);
6857 /* What does time_limit really mean? */
6858 if (time_limit
|| 0 < nsecs
)
6860 EMACS_GET_TIME (end_time
);
6861 EMACS_SET_SECS_NSECS (timeout
, time_limit
, nsecs
);
6862 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6865 /* Turn off periodic alarms (in case they are in use)
6866 and then turn off any other atimers,
6867 because the select emulator uses alarms. */
6869 turn_on_atimers (0);
6873 int timeout_reduced_for_timers
= 0;
6874 SELECT_TYPE waitchannels
;
6877 /* If calling from keyboard input, do not quit
6878 since we want to return C-g as an input character.
6879 Otherwise, do pending quit if requested. */
6883 /* Exit now if the cell we're waiting for became non-nil. */
6884 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6887 /* Compute time from now till when time limit is up */
6888 /* Exit if already run out */
6891 /* A negative timeout means
6892 gobble output available now
6893 but don't wait at all. */
6895 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6897 else if (time_limit
|| 0 < nsecs
)
6899 EMACS_GET_TIME (timeout
);
6900 if (EMACS_TIME_LE (end_time
, timeout
))
6902 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6906 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6909 /* If our caller will not immediately handle keyboard events,
6910 run timer events directly.
6911 (Callers that will immediately read keyboard events
6912 call timer_delay on their own.) */
6913 if (NILP (wait_for_cell
))
6915 EMACS_TIME timer_delay
;
6919 int old_timers_run
= timers_run
;
6920 timer_delay
= timer_check ();
6921 if (timers_run
!= old_timers_run
&& do_display
)
6922 /* We must retry, since a timer may have requeued itself
6923 and that could alter the time delay. */
6924 redisplay_preserve_echo_area (14);
6928 while (!detect_input_pending ());
6930 /* If there is unread keyboard input, also return. */
6932 && requeued_events_pending_p ())
6935 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6937 if (EMACS_TIME_LT (timer_delay
, timeout
))
6939 timeout
= timer_delay
;
6940 timeout_reduced_for_timers
= 1;
6945 /* Cause C-g and alarm signals to take immediate action,
6946 and cause input available signals to zero out timeout. */
6948 set_waiting_for_input (&timeout
);
6950 /* If a frame has been newly mapped and needs updating,
6951 reprocess its display stuff. */
6952 if (frame_garbaged
&& do_display
)
6954 clear_waiting_for_input ();
6955 redisplay_preserve_echo_area (15);
6957 set_waiting_for_input (&timeout
);
6960 /* Wait till there is something to do. */
6961 FD_ZERO (&waitchannels
);
6962 if (read_kbd
&& detect_input_pending ())
6966 if (read_kbd
|| !NILP (wait_for_cell
))
6967 FD_SET (0, &waitchannels
);
6968 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6973 /* Make C-g and alarm signals set flags again */
6974 clear_waiting_for_input ();
6976 /* If we woke up due to SIGWINCH, actually change size now. */
6977 do_pending_window_change (0);
6979 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6980 /* We waited the full specified time, so return now. */
6985 /* If the system call was interrupted, then go around the
6987 if (xerrno
== EINTR
)
6988 FD_ZERO (&waitchannels
);
6990 error ("select error: %s", emacs_strerror (xerrno
));
6993 /* Check for keyboard input */
6996 && detect_input_pending_run_timers (do_display
))
6998 swallow_events (do_display
);
6999 if (detect_input_pending_run_timers (do_display
))
7003 /* If there is unread keyboard input, also return. */
7005 && requeued_events_pending_p ())
7008 /* If wait_for_cell. check for keyboard input
7009 but don't run any timers.
7010 ??? (It seems wrong to me to check for keyboard
7011 input at all when wait_for_cell, but the code
7012 has been this way since July 1994.
7013 Try changing this after version 19.31.) */
7014 if (! NILP (wait_for_cell
)
7015 && detect_input_pending ())
7017 swallow_events (do_display
);
7018 if (detect_input_pending ())
7022 /* Exit now if the cell we're waiting for became non-nil. */
7023 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7032 #endif /* not subprocesses */
7034 /* The following functions are needed even if async subprocesses are
7035 not supported. Some of them are no-op stubs in that case. */
7037 /* Add DESC to the set of keyboard input descriptors. */
7040 add_keyboard_wait_descriptor (int desc
)
7042 #ifdef subprocesses /* actually means "not MSDOS" */
7043 FD_SET (desc
, &input_wait_mask
);
7044 FD_SET (desc
, &non_process_wait_mask
);
7045 if (desc
> max_input_desc
)
7046 max_input_desc
= desc
;
7050 /* From now on, do not expect DESC to give keyboard input. */
7053 delete_keyboard_wait_descriptor (int desc
)
7057 int lim
= max_input_desc
;
7059 FD_CLR (desc
, &input_wait_mask
);
7060 FD_CLR (desc
, &non_process_wait_mask
);
7062 if (desc
== max_input_desc
)
7063 for (fd
= 0; fd
< lim
; fd
++)
7064 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7065 max_input_desc
= fd
;
7069 /* Setup coding systems of PROCESS. */
7072 setup_process_coding_systems (Lisp_Object process
)
7075 struct Lisp_Process
*p
= XPROCESS (process
);
7077 int outch
= p
->outfd
;
7078 Lisp_Object coding_system
;
7080 if (inch
< 0 || outch
< 0)
7083 if (!proc_decode_coding_system
[inch
])
7084 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7085 coding_system
= p
->decode_coding_system
;
7086 if (! NILP (p
->filter
))
7088 else if (BUFFERP (p
->buffer
))
7090 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7091 coding_system
= raw_text_coding_system (coding_system
);
7093 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7095 if (!proc_encode_coding_system
[outch
])
7096 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7097 setup_coding_system (p
->encode_coding_system
,
7098 proc_encode_coding_system
[outch
]);
7102 /* Close all descriptors currently in use for communication
7103 with subprocess. This is used in a newly-forked subprocess
7104 to get rid of irrelevant descriptors. */
7107 close_process_descs (void)
7111 for (i
= 0; i
< MAXDESC
; i
++)
7113 Lisp_Object process
;
7114 process
= chan_process
[i
];
7115 if (!NILP (process
))
7117 int in
= XPROCESS (process
)->infd
;
7118 int out
= XPROCESS (process
)->outfd
;
7121 if (out
>= 0 && in
!= out
)
7128 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7129 doc
: /* Return the (or a) process associated with BUFFER.
7130 BUFFER may be a buffer or the name of one. */)
7131 (register Lisp_Object buffer
)
7134 register Lisp_Object buf
, tail
, proc
;
7136 if (NILP (buffer
)) return Qnil
;
7137 buf
= Fget_buffer (buffer
);
7138 if (NILP (buf
)) return Qnil
;
7140 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7142 proc
= Fcdr (XCAR (tail
));
7143 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7146 #endif /* subprocesses */
7150 DEFUN ("process-inherit-coding-system-flag",
7151 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7153 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7154 If this flag is t, `buffer-file-coding-system' of the buffer
7155 associated with PROCESS will inherit the coding system used to decode
7156 the process output. */)
7157 (register Lisp_Object process
)
7160 CHECK_PROCESS (process
);
7161 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7163 /* Ignore the argument and return the value of
7164 inherit-process-coding-system. */
7165 return inherit_process_coding_system
? Qt
: Qnil
;
7169 /* Kill all processes associated with `buffer'.
7170 If `buffer' is nil, kill all processes */
7173 kill_buffer_processes (Lisp_Object buffer
)
7176 Lisp_Object tail
, proc
;
7178 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7180 proc
= XCDR (XCAR (tail
));
7182 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7184 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7185 Fdelete_process (proc
);
7186 else if (XPROCESS (proc
)->infd
>= 0)
7187 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7190 #else /* subprocesses */
7191 /* Since we have no subprocesses, this does nothing. */
7192 #endif /* subprocesses */
7195 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7196 Swaiting_for_user_input_p
, 0, 0, 0,
7197 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7198 This is intended for use by asynchronous process output filters and sentinels. */)
7202 return (waiting_for_user_input_p
? Qt
: Qnil
);
7208 /* Stop reading input from keyboard sources. */
7211 hold_keyboard_input (void)
7216 /* Resume reading input from keyboard sources. */
7219 unhold_keyboard_input (void)
7224 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7227 kbd_on_hold_p (void)
7229 return kbd_is_on_hold
;
7233 /* Enumeration of and access to system processes a-la ps(1). */
7235 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7237 doc
: /* Return a list of numerical process IDs of all running processes.
7238 If this functionality is unsupported, return nil.
7240 See `process-attributes' for getting attributes of a process given its ID. */)
7243 return list_system_processes ();
7246 DEFUN ("process-attributes", Fprocess_attributes
,
7247 Sprocess_attributes
, 1, 1, 0,
7248 doc
: /* Return attributes of the process given by its PID, a number.
7250 Value is an alist where each element is a cons cell of the form
7254 If this functionality is unsupported, the value is nil.
7256 See `list-system-processes' for getting a list of all process IDs.
7258 The KEYs of the attributes that this function may return are listed
7259 below, together with the type of the associated VALUE (in parentheses).
7260 Not all platforms support all of these attributes; unsupported
7261 attributes will not appear in the returned alist.
7262 Unless explicitly indicated otherwise, numbers can have either
7263 integer or floating point values.
7265 euid -- Effective user User ID of the process (number)
7266 user -- User name corresponding to euid (string)
7267 egid -- Effective user Group ID of the process (number)
7268 group -- Group name corresponding to egid (string)
7269 comm -- Command name (executable name only) (string)
7270 state -- Process state code, such as "S", "R", or "T" (string)
7271 ppid -- Parent process ID (number)
7272 pgrp -- Process group ID (number)
7273 sess -- Session ID, i.e. process ID of session leader (number)
7274 ttname -- Controlling tty name (string)
7275 tpgid -- ID of foreground process group on the process's tty (number)
7276 minflt -- number of minor page faults (number)
7277 majflt -- number of major page faults (number)
7278 cminflt -- cumulative number of minor page faults (number)
7279 cmajflt -- cumulative number of major page faults (number)
7280 utime -- user time used by the process, in (current-time) format,
7281 which is a list of integers (HIGH LOW USEC PSEC)
7282 stime -- system time used by the process (current-time)
7283 time -- sum of utime and stime (current-time)
7284 cutime -- user time used by the process and its children (current-time)
7285 cstime -- system time used by the process and its children (current-time)
7286 ctime -- sum of cutime and cstime (current-time)
7287 pri -- priority of the process (number)
7288 nice -- nice value of the process (number)
7289 thcount -- process thread count (number)
7290 start -- time the process started (current-time)
7291 vsize -- virtual memory size of the process in KB's (number)
7292 rss -- resident set size of the process in KB's (number)
7293 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7294 pcpu -- percents of CPU time used by the process (floating-point number)
7295 pmem -- percents of total physical memory used by process's resident set
7296 (floating-point number)
7297 args -- command line which invoked the process (string). */)
7300 return system_process_attributes (pid
);
7310 inhibit_sentinels
= 0;
7314 if (! noninteractive
|| initialized
)
7316 signal (SIGCHLD
, sigchld_handler
);
7319 FD_ZERO (&input_wait_mask
);
7320 FD_ZERO (&non_keyboard_wait_mask
);
7321 FD_ZERO (&non_process_wait_mask
);
7322 FD_ZERO (&write_mask
);
7323 max_process_desc
= 0;
7324 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7326 #ifdef NON_BLOCKING_CONNECT
7327 FD_ZERO (&connect_wait_mask
);
7328 num_pending_connects
= 0;
7331 #ifdef ADAPTIVE_READ_BUFFERING
7332 process_output_delay_count
= 0;
7333 process_output_skip
= 0;
7336 /* Don't do this, it caused infinite select loops. The display
7337 method should call add_keyboard_wait_descriptor on stdin if it
7340 FD_SET (0, &input_wait_mask
);
7343 Vprocess_alist
= Qnil
;
7345 deleted_pid_list
= Qnil
;
7347 for (i
= 0; i
< MAXDESC
; i
++)
7349 chan_process
[i
] = Qnil
;
7350 proc_buffered_char
[i
] = -1;
7352 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7353 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7354 #ifdef DATAGRAM_SOCKETS
7355 memset (datagram_address
, 0, sizeof datagram_address
);
7359 Lisp_Object subfeatures
= Qnil
;
7360 const struct socket_options
*sopt
;
7362 #define ADD_SUBFEATURE(key, val) \
7363 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7365 #ifdef NON_BLOCKING_CONNECT
7366 ADD_SUBFEATURE (QCnowait
, Qt
);
7368 #ifdef DATAGRAM_SOCKETS
7369 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7371 #ifdef HAVE_SEQPACKET
7372 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7374 #ifdef HAVE_LOCAL_SOCKETS
7375 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7377 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7379 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7381 #ifdef HAVE_GETSOCKNAME
7382 ADD_SUBFEATURE (QCservice
, Qt
);
7384 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7385 ADD_SUBFEATURE (QCserver
, Qt
);
7388 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7389 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7391 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7394 #if defined (DARWIN_OS)
7395 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7396 processes. As such, we only change the default value. */
7399 char const *release
= (STRINGP (Voperating_system_release
)
7400 ? SSDATA (Voperating_system_release
)
7402 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7403 && release
[1] == '.')) {
7404 Vprocess_connection_type
= Qnil
;
7408 #endif /* subprocesses */
7413 syms_of_process (void)
7417 DEFSYM (Qprocessp
, "processp");
7418 DEFSYM (Qrun
, "run");
7419 DEFSYM (Qstop
, "stop");
7420 DEFSYM (Qsignal
, "signal");
7422 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7425 Qexit = intern_c_string ("exit");
7426 staticpro (&Qexit); */
7428 DEFSYM (Qopen
, "open");
7429 DEFSYM (Qclosed
, "closed");
7430 DEFSYM (Qconnect
, "connect");
7431 DEFSYM (Qfailed
, "failed");
7432 DEFSYM (Qlisten
, "listen");
7433 DEFSYM (Qlocal
, "local");
7434 DEFSYM (Qipv4
, "ipv4");
7436 DEFSYM (Qipv6
, "ipv6");
7438 DEFSYM (Qdatagram
, "datagram");
7439 DEFSYM (Qseqpacket
, "seqpacket");
7441 DEFSYM (QCport
, ":port");
7442 DEFSYM (QCspeed
, ":speed");
7443 DEFSYM (QCprocess
, ":process");
7445 DEFSYM (QCbytesize
, ":bytesize");
7446 DEFSYM (QCstopbits
, ":stopbits");
7447 DEFSYM (QCparity
, ":parity");
7448 DEFSYM (Qodd
, "odd");
7449 DEFSYM (Qeven
, "even");
7450 DEFSYM (QCflowcontrol
, ":flowcontrol");
7453 DEFSYM (QCsummary
, ":summary");
7455 DEFSYM (Qreal
, "real");
7456 DEFSYM (Qnetwork
, "network");
7457 DEFSYM (Qserial
, "serial");
7458 DEFSYM (QCbuffer
, ":buffer");
7459 DEFSYM (QChost
, ":host");
7460 DEFSYM (QCservice
, ":service");
7461 DEFSYM (QClocal
, ":local");
7462 DEFSYM (QCremote
, ":remote");
7463 DEFSYM (QCcoding
, ":coding");
7464 DEFSYM (QCserver
, ":server");
7465 DEFSYM (QCnowait
, ":nowait");
7466 DEFSYM (QCsentinel
, ":sentinel");
7467 DEFSYM (QClog
, ":log");
7468 DEFSYM (QCnoquery
, ":noquery");
7469 DEFSYM (QCstop
, ":stop");
7470 DEFSYM (QCoptions
, ":options");
7471 DEFSYM (QCplist
, ":plist");
7473 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7475 staticpro (&Vprocess_alist
);
7477 staticpro (&deleted_pid_list
);
7480 #endif /* subprocesses */
7482 DEFSYM (QCname
, ":name");
7483 DEFSYM (QCtype
, ":type");
7485 DEFSYM (Qeuid
, "euid");
7486 DEFSYM (Qegid
, "egid");
7487 DEFSYM (Quser
, "user");
7488 DEFSYM (Qgroup
, "group");
7489 DEFSYM (Qcomm
, "comm");
7490 DEFSYM (Qstate
, "state");
7491 DEFSYM (Qppid
, "ppid");
7492 DEFSYM (Qpgrp
, "pgrp");
7493 DEFSYM (Qsess
, "sess");
7494 DEFSYM (Qttname
, "ttname");
7495 DEFSYM (Qtpgid
, "tpgid");
7496 DEFSYM (Qminflt
, "minflt");
7497 DEFSYM (Qmajflt
, "majflt");
7498 DEFSYM (Qcminflt
, "cminflt");
7499 DEFSYM (Qcmajflt
, "cmajflt");
7500 DEFSYM (Qutime
, "utime");
7501 DEFSYM (Qstime
, "stime");
7502 DEFSYM (Qtime
, "time");
7503 DEFSYM (Qcutime
, "cutime");
7504 DEFSYM (Qcstime
, "cstime");
7505 DEFSYM (Qctime
, "ctime");
7506 DEFSYM (Qpri
, "pri");
7507 DEFSYM (Qnice
, "nice");
7508 DEFSYM (Qthcount
, "thcount");
7509 DEFSYM (Qstart
, "start");
7510 DEFSYM (Qvsize
, "vsize");
7511 DEFSYM (Qrss
, "rss");
7512 DEFSYM (Qetime
, "etime");
7513 DEFSYM (Qpcpu
, "pcpu");
7514 DEFSYM (Qpmem
, "pmem");
7515 DEFSYM (Qargs
, "args");
7517 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7518 doc
: /* Non-nil means delete processes immediately when they exit.
7519 A value of nil means don't delete them until `list-processes' is run. */);
7521 delete_exited_processes
= 1;
7524 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7525 doc
: /* Control type of device used to communicate with subprocesses.
7526 Values are nil to use a pipe, or t or `pty' to use a pty.
7527 The value has no effect if the system has no ptys or if all ptys are busy:
7528 then a pipe is used in any case.
7529 The value takes effect when `start-process' is called. */);
7530 Vprocess_connection_type
= Qt
;
7532 #ifdef ADAPTIVE_READ_BUFFERING
7533 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7534 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7535 On some systems, when Emacs reads the output from a subprocess, the output data
7536 is read in very small blocks, potentially resulting in very poor performance.
7537 This behavior can be remedied to some extent by setting this variable to a
7538 non-nil value, as it will automatically delay reading from such processes, to
7539 allow them to produce more output before Emacs tries to read it.
7540 If the value is t, the delay is reset after each write to the process; any other
7541 non-nil value means that the delay is not reset on write.
7542 The variable takes effect when `start-process' is called. */);
7543 Vprocess_adaptive_read_buffering
= Qt
;
7546 defsubr (&Sprocessp
);
7547 defsubr (&Sget_process
);
7548 defsubr (&Sdelete_process
);
7549 defsubr (&Sprocess_status
);
7550 defsubr (&Sprocess_exit_status
);
7551 defsubr (&Sprocess_id
);
7552 defsubr (&Sprocess_name
);
7553 defsubr (&Sprocess_tty_name
);
7554 defsubr (&Sprocess_command
);
7555 defsubr (&Sset_process_buffer
);
7556 defsubr (&Sprocess_buffer
);
7557 defsubr (&Sprocess_mark
);
7558 defsubr (&Sset_process_filter
);
7559 defsubr (&Sprocess_filter
);
7560 defsubr (&Sset_process_sentinel
);
7561 defsubr (&Sprocess_sentinel
);
7562 defsubr (&Sset_process_window_size
);
7563 defsubr (&Sset_process_inherit_coding_system_flag
);
7564 defsubr (&Sset_process_query_on_exit_flag
);
7565 defsubr (&Sprocess_query_on_exit_flag
);
7566 defsubr (&Sprocess_contact
);
7567 defsubr (&Sprocess_plist
);
7568 defsubr (&Sset_process_plist
);
7569 defsubr (&Sprocess_list
);
7570 defsubr (&Sstart_process
);
7571 defsubr (&Sserial_process_configure
);
7572 defsubr (&Smake_serial_process
);
7573 defsubr (&Sset_network_process_option
);
7574 defsubr (&Smake_network_process
);
7575 defsubr (&Sformat_network_address
);
7576 #if defined (HAVE_NET_IF_H)
7578 defsubr (&Snetwork_interface_list
);
7580 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7581 defsubr (&Snetwork_interface_info
);
7583 #endif /* defined (HAVE_NET_IF_H) */
7584 #ifdef DATAGRAM_SOCKETS
7585 defsubr (&Sprocess_datagram_address
);
7586 defsubr (&Sset_process_datagram_address
);
7588 defsubr (&Saccept_process_output
);
7589 defsubr (&Sprocess_send_region
);
7590 defsubr (&Sprocess_send_string
);
7591 defsubr (&Sinterrupt_process
);
7592 defsubr (&Skill_process
);
7593 defsubr (&Squit_process
);
7594 defsubr (&Sstop_process
);
7595 defsubr (&Scontinue_process
);
7596 defsubr (&Sprocess_running_child_p
);
7597 defsubr (&Sprocess_send_eof
);
7598 defsubr (&Ssignal_process
);
7599 defsubr (&Swaiting_for_user_input_p
);
7600 defsubr (&Sprocess_type
);
7601 defsubr (&Sset_process_coding_system
);
7602 defsubr (&Sprocess_coding_system
);
7603 defsubr (&Sset_process_filter_multibyte
);
7604 defsubr (&Sprocess_filter_multibyte_p
);
7606 #endif /* subprocesses */
7608 defsubr (&Sget_buffer_process
);
7609 defsubr (&Sprocess_inherit_coding_system_flag
);
7610 defsubr (&Slist_system_processes
);
7611 defsubr (&Sprocess_attributes
);