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/>. */
24 #define PROCESS_INLINE EXTERN_INLINE
28 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
36 /* Only MS-DOS does not define `subprocesses'. */
39 #include <sys/socket.h>
41 #include <netinet/in.h>
42 #include <arpa/inet.h>
44 /* Are local (unix) sockets supported? */
45 #if defined (HAVE_SYS_UN_H)
46 #if !defined (AF_LOCAL) && defined (AF_UNIX)
47 #define AF_LOCAL AF_UNIX
50 #define HAVE_LOCAL_SOCKETS
55 #include <sys/ioctl.h>
56 #if defined (HAVE_NET_IF_H)
58 #endif /* HAVE_NET_IF_H */
60 #if defined (HAVE_IFADDRS_H)
61 /* Must be after net/if.h */
64 /* We only use structs from this header when we use getifaddrs. */
65 #if defined (HAVE_NET_IF_DL_H)
66 #include <net/if_dl.h>
76 # include <sys/stream.h>
77 # include <sys/stropts.h>
81 #include <netinet/in.h>
82 #include <arpa/nameser.h>
94 #endif /* subprocesses */
100 #include "character.h"
105 #include "termhooks.h"
106 #include "termopts.h"
107 #include "commands.h"
108 #include "keyboard.h"
109 #include "blockinput.h"
110 #include "dispextern.h"
111 #include "composite.h"
113 #include "sysselect.h"
114 #include "syssignal.h"
120 #ifdef HAVE_WINDOW_SYSTEM
122 #endif /* HAVE_WINDOW_SYSTEM */
124 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
125 #include "xgselect.h"
130 # define waitpid(pid, status, options) wait (status)
136 /* Work around GCC 4.7.0 bug with strict overflow checking; see
137 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
138 These lines can be removed once the GCC bug is fixed. */
139 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
140 # pragma GCC diagnostic ignored "-Wstrict-overflow"
143 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
144 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
145 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
146 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
147 Lisp_Object QCname
, QCtype
;
149 /* Non-zero if keyboard input is on hold, zero otherwise. */
151 static int kbd_is_on_hold
;
153 /* Nonzero means don't run process sentinels. This is used
155 int inhibit_sentinels
;
159 Lisp_Object Qprocessp
;
160 static Lisp_Object Qrun
, Qstop
, Qsignal
;
161 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
163 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
164 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
166 static Lisp_Object Qipv6
;
168 static Lisp_Object QCport
, QCprocess
;
170 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
171 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
172 static Lisp_Object QCbuffer
, QChost
, QCservice
;
173 static Lisp_Object QClocal
, QCremote
, QCcoding
;
174 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
175 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
176 static Lisp_Object Qlast_nonmenu_event
;
178 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
179 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
180 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
181 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
187 /* Number of events of change of status of a process. */
188 static EMACS_INT process_tick
;
189 /* Number of events for which the user or sentinel has been notified. */
190 static EMACS_INT update_tick
;
192 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
194 /* Only W32 has this, it really means that select can't take write mask. */
195 #ifdef BROKEN_NON_BLOCKING_CONNECT
196 #undef NON_BLOCKING_CONNECT
197 #define SELECT_CANT_DO_WRITE_MASK
199 #ifndef NON_BLOCKING_CONNECT
201 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
202 #if defined (O_NONBLOCK) || defined (O_NDELAY)
203 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
204 #define NON_BLOCKING_CONNECT
205 #endif /* EWOULDBLOCK || EINPROGRESS */
206 #endif /* O_NONBLOCK || O_NDELAY */
207 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
208 #endif /* HAVE_SELECT */
209 #endif /* NON_BLOCKING_CONNECT */
210 #endif /* BROKEN_NON_BLOCKING_CONNECT */
212 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
213 this system. We need to read full packets, so we need a
214 "non-destructive" select. So we require either native select,
215 or emulation of select using FIONREAD. */
217 #ifndef BROKEN_DATAGRAM_SOCKETS
218 # if defined HAVE_SELECT || defined USABLE_FIONREAD
219 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
220 # define DATAGRAM_SOCKETS
225 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
226 # define HAVE_SEQPACKET
229 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
230 #define ADAPTIVE_READ_BUFFERING
233 #ifdef ADAPTIVE_READ_BUFFERING
234 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
235 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
236 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
238 /* Number of processes which have a non-zero read_output_delay,
239 and therefore might be delayed for adaptive read buffering. */
241 static int process_output_delay_count
;
243 /* Non-zero if any process has non-nil read_output_skip. */
245 static int process_output_skip
;
248 #define process_output_delay_count 0
251 static void create_process (Lisp_Object
, char **, Lisp_Object
);
253 static int keyboard_bit_set (SELECT_TYPE
*);
255 static void deactivate_process (Lisp_Object
);
256 static void status_notify (struct Lisp_Process
*);
257 static int read_process_output (Lisp_Object
, int);
258 static void handle_child_signal (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 #ifdef HAVE_WINDOW_SYSTEM
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
;
337 /* These setters are used only in this file, so they can be private. */
339 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
344 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
349 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
351 p
->decode_coding_system
= val
;
354 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
356 p
->decoding_buf
= val
;
359 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
361 p
->encode_coding_system
= val
;
364 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
366 p
->encoding_buf
= val
;
369 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
374 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
379 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
384 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
389 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
394 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
399 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
404 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
409 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
414 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
416 p
->write_queue
= val
;
421 static struct fd_callback_data
427 int condition
; /* mask of the defines above. */
428 } fd_callback_info
[MAXDESC
];
431 /* Add a file descriptor FD to be monitored for when read is possible.
432 When read is possible, call FUNC with argument DATA. */
435 add_read_fd (int fd
, fd_callback func
, void *data
)
437 eassert (fd
< MAXDESC
);
438 add_keyboard_wait_descriptor (fd
);
440 fd_callback_info
[fd
].func
= func
;
441 fd_callback_info
[fd
].data
= data
;
442 fd_callback_info
[fd
].condition
|= FOR_READ
;
445 /* Stop monitoring file descriptor FD for when read is possible. */
448 delete_read_fd (int fd
)
450 eassert (fd
< MAXDESC
);
451 delete_keyboard_wait_descriptor (fd
);
453 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
454 if (fd_callback_info
[fd
].condition
== 0)
456 fd_callback_info
[fd
].func
= 0;
457 fd_callback_info
[fd
].data
= 0;
461 /* Add a file descriptor FD to be monitored for when write is possible.
462 When write is possible, call FUNC with argument DATA. */
465 add_write_fd (int fd
, fd_callback func
, void *data
)
467 eassert (fd
< MAXDESC
);
468 FD_SET (fd
, &write_mask
);
469 if (fd
> max_input_desc
)
472 fd_callback_info
[fd
].func
= func
;
473 fd_callback_info
[fd
].data
= data
;
474 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
477 /* Stop monitoring file descriptor FD for when write is possible. */
480 delete_write_fd (int fd
)
482 int lim
= max_input_desc
;
484 eassert (fd
< MAXDESC
);
485 FD_CLR (fd
, &write_mask
);
486 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
487 if (fd_callback_info
[fd
].condition
== 0)
489 fd_callback_info
[fd
].func
= 0;
490 fd_callback_info
[fd
].data
= 0;
492 if (fd
== max_input_desc
)
493 for (fd
= lim
; fd
>= 0; fd
--)
494 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
504 /* Compute the Lisp form of the process status, p->status, from
505 the numeric status that was returned by `wait'. */
507 static Lisp_Object
status_convert (int);
510 update_status (struct Lisp_Process
*p
)
512 eassert (p
->raw_status_new
);
513 pset_status (p
, status_convert (p
->raw_status
));
514 p
->raw_status_new
= 0;
517 /* Convert a process status word in Unix format to
518 the list that we use internally. */
521 status_convert (int w
)
524 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
525 else if (WIFEXITED (w
))
526 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
527 WCOREDUMP (w
) ? Qt
: Qnil
));
528 else if (WIFSIGNALED (w
))
529 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
530 WCOREDUMP (w
) ? Qt
: Qnil
));
535 /* Given a status-list, extract the three pieces of information
536 and store them individually through the three pointers. */
539 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
553 *code
= XFASTINT (XCAR (tem
));
555 *coredump
= !NILP (tem
);
559 /* Return a string describing a process status list. */
562 status_message (struct Lisp_Process
*p
)
564 Lisp_Object status
= p
->status
;
567 Lisp_Object string
, string2
;
569 decode_status (status
, &symbol
, &code
, &coredump
);
571 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
574 synchronize_system_messages_locale ();
575 signame
= strsignal (code
);
577 string
= build_string ("unknown");
582 string
= build_unibyte_string (signame
);
583 if (! NILP (Vlocale_coding_system
))
584 string
= (code_convert_string_norecord
585 (string
, Vlocale_coding_system
, 0));
586 c1
= STRING_CHAR (SDATA (string
));
589 Faset (string
, make_number (0), make_number (c2
));
591 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
592 return concat2 (string
, string2
);
594 else if (EQ (symbol
, Qexit
))
597 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
599 return build_string ("finished\n");
600 string
= Fnumber_to_string (make_number (code
));
601 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
602 return concat3 (build_string ("exited abnormally with code "),
605 else if (EQ (symbol
, Qfailed
))
607 string
= Fnumber_to_string (make_number (code
));
608 string2
= build_string ("\n");
609 return concat3 (build_string ("failed with code "),
613 return Fcopy_sequence (Fsymbol_name (symbol
));
618 /* The file name of the pty opened by allocate_pty. */
619 static char pty_name
[24];
621 /* Open an available pty, returning a file descriptor.
622 Return -1 on failure.
623 The file name of the terminal corresponding to the pty
624 is left in the variable pty_name. */
635 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
636 for (i
= 0; i
< 16; i
++)
639 #ifdef PTY_NAME_SPRINTF
642 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
643 #endif /* no PTY_NAME_SPRINTF */
647 #else /* no PTY_OPEN */
650 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
652 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
655 #endif /* no PTY_OPEN */
659 /* check to make certain that both sides are available
660 this avoids a nasty yet stupid bug in rlogins */
661 #ifdef PTY_TTY_NAME_SPRINTF
664 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
665 #endif /* no PTY_TTY_NAME_SPRINTF */
666 if (access (pty_name
, 6) != 0)
681 #endif /* HAVE_PTYS */
684 make_process (Lisp_Object name
)
686 register Lisp_Object val
, tem
, name1
;
687 register struct Lisp_Process
*p
;
688 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
691 p
= allocate_process ();
692 /* Initialize Lisp data. Note that allocate_process initializes all
693 Lisp data to nil, so do it only for slots which should not be nil. */
694 pset_status (p
, Qrun
);
695 pset_mark (p
, Fmake_marker ());
697 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
698 non-Lisp data, so do it only for slots which should not be zero. */
703 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
706 /* If name is already in use, modify it until it is unused. */
711 tem
= Fget_process (name1
);
712 if (NILP (tem
)) break;
713 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
717 XSETPROCESS (val
, p
);
718 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
723 remove_process (register Lisp_Object proc
)
725 register Lisp_Object pair
;
727 pair
= Frassq (proc
, Vprocess_alist
);
728 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
730 deactivate_process (proc
);
734 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
735 doc
: /* Return t if OBJECT is a process. */)
738 return PROCESSP (object
) ? Qt
: Qnil
;
741 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
742 doc
: /* Return the process named NAME, or nil if there is none. */)
743 (register Lisp_Object name
)
748 return Fcdr (Fassoc (name
, Vprocess_alist
));
751 /* This is how commands for the user decode process arguments. It
752 accepts a process, a process name, a buffer, a buffer name, or nil.
753 Buffers denote the first process in the buffer, and nil denotes the
757 get_process (register Lisp_Object name
)
759 register Lisp_Object proc
, obj
;
762 obj
= Fget_process (name
);
764 obj
= Fget_buffer (name
);
766 error ("Process %s does not exist", SDATA (name
));
768 else if (NILP (name
))
769 obj
= Fcurrent_buffer ();
773 /* Now obj should be either a buffer object or a process object.
777 proc
= Fget_buffer_process (obj
);
779 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
791 /* Fdelete_process promises to immediately forget about the process, but in
792 reality, Emacs needs to remember those processes until they have been
793 treated by the SIGCHLD handler; otherwise this handler would consider the
794 process as being synchronous and say that the synchronous process is
796 static Lisp_Object deleted_pid_list
;
799 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
800 doc
: /* Delete PROCESS: kill it and forget about it immediately.
801 PROCESS may be a process, a buffer, the name of a process or buffer, or
802 nil, indicating the current buffer's process. */)
803 (register Lisp_Object process
)
805 register struct Lisp_Process
*p
;
807 process
= get_process (process
);
808 p
= XPROCESS (process
);
810 p
->raw_status_new
= 0;
811 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
813 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
814 p
->tick
= ++process_tick
;
816 redisplay_preserve_echo_area (13);
818 else if (p
->infd
>= 0)
824 /* No problem storing the pid here, as it is still in Vprocess_alist. */
825 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
826 /* GC treated elements set to nil. */
827 Fdelq (Qnil
, deleted_pid_list
));
828 /* If the process has already signaled, remove it from the list. */
829 if (p
->raw_status_new
)
832 if (CONSP (p
->status
))
833 symbol
= XCAR (p
->status
);
834 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
836 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
840 Fkill_process (process
, Qnil
);
841 /* Do this now, since remove_process will make the
842 SIGCHLD handler do nothing. */
843 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
844 p
->tick
= ++process_tick
;
846 redisplay_preserve_echo_area (13);
849 remove_process (process
);
853 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
854 doc
: /* Return the status of PROCESS.
855 The returned value is one of the following symbols:
856 run -- for a process that is running.
857 stop -- for a process stopped but continuable.
858 exit -- for a process that has exited.
859 signal -- for a process that has got a fatal signal.
860 open -- for a network stream connection that is open.
861 listen -- for a network stream server that is listening.
862 closed -- for a network stream connection that is closed.
863 connect -- when waiting for a non-blocking connection to complete.
864 failed -- when a non-blocking connection has failed.
865 nil -- if arg is a process name and no such process exists.
866 PROCESS may be a process, a buffer, the name of a process, or
867 nil, indicating the current buffer's process. */)
868 (register Lisp_Object process
)
870 register struct Lisp_Process
*p
;
871 register Lisp_Object status
;
873 if (STRINGP (process
))
874 process
= Fget_process (process
);
876 process
= get_process (process
);
881 p
= XPROCESS (process
);
882 if (p
->raw_status_new
)
886 status
= XCAR (status
);
887 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
889 if (EQ (status
, Qexit
))
891 else if (EQ (p
->command
, Qt
))
893 else if (EQ (status
, Qrun
))
899 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
901 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
902 If PROCESS has not yet exited or died, return 0. */)
903 (register Lisp_Object process
)
905 CHECK_PROCESS (process
);
906 if (XPROCESS (process
)->raw_status_new
)
907 update_status (XPROCESS (process
));
908 if (CONSP (XPROCESS (process
)->status
))
909 return XCAR (XCDR (XPROCESS (process
)->status
));
910 return make_number (0);
913 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
914 doc
: /* Return the process id of PROCESS.
915 This is the pid of the external process which PROCESS uses or talks to.
916 For a network connection, this value is nil. */)
917 (register Lisp_Object process
)
921 CHECK_PROCESS (process
);
922 pid
= XPROCESS (process
)->pid
;
923 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
926 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
927 doc
: /* Return the name of PROCESS, as a string.
928 This is the name of the program invoked in PROCESS,
929 possibly modified to make it unique among process names. */)
930 (register Lisp_Object process
)
932 CHECK_PROCESS (process
);
933 return XPROCESS (process
)->name
;
936 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
937 doc
: /* Return the command that was executed to start PROCESS.
938 This is a list of strings, the first string being the program executed
939 and the rest of the strings being the arguments given to it.
940 For a network or serial process, this is nil (process is running) or t
941 \(process is stopped). */)
942 (register Lisp_Object process
)
944 CHECK_PROCESS (process
);
945 return XPROCESS (process
)->command
;
948 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
949 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
950 This is the terminal that the process itself reads and writes on,
951 not the name of the pty that Emacs uses to talk with that terminal. */)
952 (register Lisp_Object process
)
954 CHECK_PROCESS (process
);
955 return XPROCESS (process
)->tty_name
;
958 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
960 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
962 (register Lisp_Object process
, Lisp_Object buffer
)
964 struct Lisp_Process
*p
;
966 CHECK_PROCESS (process
);
968 CHECK_BUFFER (buffer
);
969 p
= XPROCESS (process
);
970 pset_buffer (p
, buffer
);
971 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
972 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
973 setup_process_coding_systems (process
);
977 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
979 doc
: /* Return the buffer PROCESS is associated with.
980 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
981 (register Lisp_Object process
)
983 CHECK_PROCESS (process
);
984 return XPROCESS (process
)->buffer
;
987 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
989 doc
: /* Return the marker for the end of the last output from PROCESS. */)
990 (register Lisp_Object process
)
992 CHECK_PROCESS (process
);
993 return XPROCESS (process
)->mark
;
996 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
998 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
999 A value of t means stop accepting output from the process.
1001 When a process has a filter, its buffer is not used for output.
1002 Instead, each time it does output, the entire string of output is
1003 passed to the filter.
1005 The filter gets two arguments: the process and the string of output.
1006 The string argument is normally a multibyte string, except:
1007 - if the process' input coding system is no-conversion or raw-text,
1008 it is a unibyte string (the non-converted input), or else
1009 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1010 string (the result of converting the decoded input multibyte
1011 string to unibyte with `string-make-unibyte'). */)
1012 (register Lisp_Object process
, Lisp_Object filter
)
1014 struct Lisp_Process
*p
;
1016 CHECK_PROCESS (process
);
1017 p
= XPROCESS (process
);
1019 /* Don't signal an error if the process' input file descriptor
1020 is closed. This could make debugging Lisp more difficult,
1021 for example when doing something like
1023 (setq process (start-process ...))
1025 (set-process-filter process ...) */
1029 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1031 FD_CLR (p
->infd
, &input_wait_mask
);
1032 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1034 else if (EQ (p
->filter
, Qt
)
1035 /* Network or serial process not stopped: */
1036 && !EQ (p
->command
, Qt
))
1038 FD_SET (p
->infd
, &input_wait_mask
);
1039 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1043 pset_filter (p
, filter
);
1044 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1045 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1046 setup_process_coding_systems (process
);
1050 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1052 doc
: /* Returns the filter function of PROCESS; nil if none.
1053 See `set-process-filter' for more info on filter functions. */)
1054 (register Lisp_Object process
)
1056 CHECK_PROCESS (process
);
1057 return XPROCESS (process
)->filter
;
1060 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1062 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1063 The sentinel is called as a function when the process changes state.
1064 It gets two arguments: the process, and a string describing the change. */)
1065 (register Lisp_Object process
, Lisp_Object sentinel
)
1067 struct Lisp_Process
*p
;
1069 CHECK_PROCESS (process
);
1070 p
= XPROCESS (process
);
1072 pset_sentinel (p
, sentinel
);
1073 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1074 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1078 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1080 doc
: /* Return the sentinel of PROCESS; nil if none.
1081 See `set-process-sentinel' for more info on sentinels. */)
1082 (register Lisp_Object process
)
1084 CHECK_PROCESS (process
);
1085 return XPROCESS (process
)->sentinel
;
1088 DEFUN ("set-process-window-size", Fset_process_window_size
,
1089 Sset_process_window_size
, 3, 3, 0,
1090 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1091 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1093 CHECK_PROCESS (process
);
1094 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1095 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1097 if (XPROCESS (process
)->infd
< 0
1098 || set_window_size (XPROCESS (process
)->infd
,
1099 XINT (height
), XINT (width
)) <= 0)
1105 DEFUN ("set-process-inherit-coding-system-flag",
1106 Fset_process_inherit_coding_system_flag
,
1107 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1108 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1109 If the second argument FLAG is non-nil, then the variable
1110 `buffer-file-coding-system' of the buffer associated with PROCESS
1111 will be bound to the value of the coding system used to decode
1114 This is useful when the coding system specified for the process buffer
1115 leaves either the character code conversion or the end-of-line conversion
1116 unspecified, or if the coding system used to decode the process output
1117 is more appropriate for saving the process buffer.
1119 Binding the variable `inherit-process-coding-system' to non-nil before
1120 starting the process is an alternative way of setting the inherit flag
1121 for the process which will run.
1123 This function returns FLAG. */)
1124 (register Lisp_Object process
, Lisp_Object flag
)
1126 CHECK_PROCESS (process
);
1127 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1131 DEFUN ("set-process-query-on-exit-flag",
1132 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1134 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1135 If the second argument FLAG is non-nil, Emacs will query the user before
1136 exiting or killing a buffer if PROCESS is running. This function
1138 (register Lisp_Object process
, Lisp_Object flag
)
1140 CHECK_PROCESS (process
);
1141 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1145 DEFUN ("process-query-on-exit-flag",
1146 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1148 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1149 (register Lisp_Object process
)
1151 CHECK_PROCESS (process
);
1152 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1155 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1157 doc
: /* Return the contact info of PROCESS; t for a real child.
1158 For a network or serial connection, the value depends on the optional
1159 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1160 SERVICE) for a network connection or (PORT SPEED) for a serial
1161 connection. If KEY is t, the complete contact information for the
1162 connection is returned, else the specific value for the keyword KEY is
1163 returned. See `make-network-process' or `make-serial-process' for a
1164 list of keywords. */)
1165 (register Lisp_Object process
, Lisp_Object key
)
1167 Lisp_Object contact
;
1169 CHECK_PROCESS (process
);
1170 contact
= XPROCESS (process
)->childp
;
1172 #ifdef DATAGRAM_SOCKETS
1173 if (DATAGRAM_CONN_P (process
)
1174 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1175 contact
= Fplist_put (contact
, QCremote
,
1176 Fprocess_datagram_address (process
));
1179 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1181 if (NILP (key
) && NETCONN_P (process
))
1182 return Fcons (Fplist_get (contact
, QChost
),
1183 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1184 if (NILP (key
) && SERIALCONN_P (process
))
1185 return Fcons (Fplist_get (contact
, QCport
),
1186 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1187 return Fplist_get (contact
, key
);
1190 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1192 doc
: /* Return the plist of PROCESS. */)
1193 (register Lisp_Object process
)
1195 CHECK_PROCESS (process
);
1196 return XPROCESS (process
)->plist
;
1199 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1201 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1202 (register Lisp_Object process
, Lisp_Object plist
)
1204 CHECK_PROCESS (process
);
1207 pset_plist (XPROCESS (process
), plist
);
1211 #if 0 /* Turned off because we don't currently record this info
1212 in the process. Perhaps add it. */
1213 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1214 doc
: /* Return the connection type of PROCESS.
1215 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1216 a socket connection. */)
1217 (Lisp_Object process
)
1219 return XPROCESS (process
)->type
;
1223 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1224 doc
: /* Return the connection type of PROCESS.
1225 The value is either the symbol `real', `network', or `serial'.
1226 PROCESS may be a process, a buffer, the name of a process or buffer, or
1227 nil, indicating the current buffer's process. */)
1228 (Lisp_Object process
)
1231 proc
= get_process (process
);
1232 return XPROCESS (proc
)->type
;
1235 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1237 doc
: /* Convert network ADDRESS from internal format to a string.
1238 A 4 or 5 element vector represents an IPv4 address (with port number).
1239 An 8 or 9 element vector represents an IPv6 address (with port number).
1240 If optional second argument OMIT-PORT is non-nil, don't include a port
1241 number in the string, even when present in ADDRESS.
1242 Returns nil if format of ADDRESS is invalid. */)
1243 (Lisp_Object address
, Lisp_Object omit_port
)
1248 if (STRINGP (address
)) /* AF_LOCAL */
1251 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1253 register struct Lisp_Vector
*p
= XVECTOR (address
);
1254 ptrdiff_t size
= p
->header
.size
;
1255 Lisp_Object args
[10];
1258 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1260 args
[0] = build_string ("%d.%d.%d.%d");
1265 args
[0] = build_string ("%d.%d.%d.%d:%d");
1268 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1270 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1275 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1281 for (i
= 0; i
< nargs
; i
++)
1283 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1286 if (nargs
<= 5 /* IPv4 */
1287 && i
< 4 /* host, not port */
1288 && XINT (p
->contents
[i
]) > 255)
1291 args
[i
+1] = p
->contents
[i
];
1294 return Fformat (nargs
+1, args
);
1297 if (CONSP (address
))
1299 Lisp_Object args
[2];
1300 args
[0] = build_string ("<Family %d>");
1301 args
[1] = Fcar (address
);
1302 return Fformat (2, args
);
1308 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1309 doc
: /* Return a list of all processes. */)
1312 return Fmapcar (Qcdr
, Vprocess_alist
);
1315 /* Starting asynchronous inferior processes. */
1317 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1319 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1320 doc
: /* Start a program in a subprocess. Return the process object for it.
1321 NAME is name for process. It is modified if necessary to make it unique.
1322 BUFFER is the buffer (or buffer name) to associate with the process.
1324 Process output (both standard output and standard error streams) goes
1325 at end of BUFFER, unless you specify an output stream or filter
1326 function to handle the output. BUFFER may also be nil, meaning that
1327 this process is not associated with any buffer.
1329 PROGRAM is the program file name. It is searched for in `exec-path'
1330 (which see). If nil, just associate a pty with the buffer. Remaining
1331 arguments are strings to give program as arguments.
1333 If you want to separate standard output from standard error, invoke
1334 the command through a shell and redirect one of them using the shell
1337 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1338 (ptrdiff_t nargs
, Lisp_Object
*args
)
1340 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1341 register unsigned char **new_argv
;
1343 ptrdiff_t count
= SPECPDL_INDEX ();
1347 buffer
= Fget_buffer_create (buffer
);
1349 /* Make sure that the child will be able to chdir to the current
1350 buffer's current directory, or its unhandled equivalent. We
1351 can't just have the child check for an error when it does the
1352 chdir, since it's in a vfork.
1354 We have to GCPRO around this because Fexpand_file_name and
1355 Funhandled_file_name_directory might call a file name handling
1356 function. The argument list is protected by the caller, so all
1357 we really have to worry about is buffer. */
1359 struct gcpro gcpro1
, gcpro2
;
1361 current_dir
= BVAR (current_buffer
, directory
);
1363 GCPRO2 (buffer
, current_dir
);
1365 current_dir
= Funhandled_file_name_directory (current_dir
);
1366 if (NILP (current_dir
))
1367 /* If the file name handler says that current_dir is unreachable, use
1368 a sensible default. */
1369 current_dir
= build_string ("~/");
1370 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1371 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1372 report_file_error ("Setting current directory",
1373 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1379 CHECK_STRING (name
);
1383 if (!NILP (program
))
1384 CHECK_STRING (program
);
1386 proc
= make_process (name
);
1387 /* If an error occurs and we can't start the process, we want to
1388 remove it from the process list. This means that each error
1389 check in create_process doesn't need to call remove_process
1390 itself; it's all taken care of here. */
1391 record_unwind_protect (start_process_unwind
, proc
);
1393 pset_childp (XPROCESS (proc
), Qt
);
1394 pset_plist (XPROCESS (proc
), Qnil
);
1395 pset_type (XPROCESS (proc
), Qreal
);
1396 pset_buffer (XPROCESS (proc
), buffer
);
1397 pset_sentinel (XPROCESS (proc
), Qnil
);
1398 pset_filter (XPROCESS (proc
), Qnil
);
1399 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1402 /* AKA GNUTLS_INITSTAGE(proc). */
1403 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1404 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1407 #ifdef ADAPTIVE_READ_BUFFERING
1408 XPROCESS (proc
)->adaptive_read_buffering
1409 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1410 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1413 /* Make the process marker point into the process buffer (if any). */
1414 if (BUFFERP (buffer
))
1415 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1416 BUF_ZV (XBUFFER (buffer
)),
1417 BUF_ZV_BYTE (XBUFFER (buffer
)));
1420 /* Decide coding systems for communicating with the process. Here
1421 we don't setup the structure coding_system nor pay attention to
1422 unibyte mode. They are done in create_process. */
1424 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1425 Lisp_Object coding_systems
= Qt
;
1426 Lisp_Object val
, *args2
;
1427 struct gcpro gcpro1
, gcpro2
;
1429 val
= Vcoding_system_for_read
;
1432 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1433 args2
[0] = Qstart_process
;
1434 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1435 GCPRO2 (proc
, current_dir
);
1436 if (!NILP (program
))
1437 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1439 if (CONSP (coding_systems
))
1440 val
= XCAR (coding_systems
);
1441 else if (CONSP (Vdefault_process_coding_system
))
1442 val
= XCAR (Vdefault_process_coding_system
);
1444 pset_decode_coding_system (XPROCESS (proc
), val
);
1446 val
= Vcoding_system_for_write
;
1449 if (EQ (coding_systems
, Qt
))
1451 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1452 args2
[0] = Qstart_process
;
1453 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1454 GCPRO2 (proc
, current_dir
);
1455 if (!NILP (program
))
1456 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1459 if (CONSP (coding_systems
))
1460 val
= XCDR (coding_systems
);
1461 else if (CONSP (Vdefault_process_coding_system
))
1462 val
= XCDR (Vdefault_process_coding_system
);
1464 pset_encode_coding_system (XPROCESS (proc
), val
);
1465 /* Note: At this moment, the above coding system may leave
1466 text-conversion or eol-conversion unspecified. They will be
1467 decided after we read output from the process and decode it by
1468 some coding system, or just before we actually send a text to
1473 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1474 XPROCESS (proc
)->decoding_carryover
= 0;
1475 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1477 XPROCESS (proc
)->inherit_coding_system_flag
1478 = !(NILP (buffer
) || !inherit_process_coding_system
);
1480 if (!NILP (program
))
1482 /* If program file name is not absolute, search our path for it.
1483 Put the name we will really use in TEM. */
1484 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1485 && !(SCHARS (program
) > 1
1486 && IS_DEVICE_SEP (SREF (program
, 1))))
1488 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1491 GCPRO4 (name
, program
, buffer
, current_dir
);
1492 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1495 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1496 tem
= Fexpand_file_name (tem
, Qnil
);
1500 if (!NILP (Ffile_directory_p (program
)))
1501 error ("Specified program for new process is a directory");
1505 /* If program file name starts with /: for quoting a magic name,
1507 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1508 && SREF (tem
, 1) == ':')
1509 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1512 Lisp_Object arg_encoding
= Qnil
;
1513 struct gcpro gcpro1
;
1516 /* Encode the file name and put it in NEW_ARGV.
1517 That's where the child will use it to execute the program. */
1518 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1520 /* Here we encode arguments by the coding system used for sending
1521 data to the process. We don't support using different coding
1522 systems for encoding arguments and for encoding data sent to the
1525 for (i
= 3; i
< nargs
; i
++)
1527 tem
= Fcons (args
[i
], tem
);
1528 CHECK_STRING (XCAR (tem
));
1529 if (STRING_MULTIBYTE (XCAR (tem
)))
1531 if (NILP (arg_encoding
))
1532 arg_encoding
= (complement_process_encoding_system
1533 (XPROCESS (proc
)->encode_coding_system
));
1535 code_convert_string_norecord
1536 (XCAR (tem
), arg_encoding
, 1));
1543 /* Now that everything is encoded we can collect the strings into
1545 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1546 new_argv
[nargs
- 2] = 0;
1548 for (i
= nargs
- 2; i
-- != 0; )
1550 new_argv
[i
] = SDATA (XCAR (tem
));
1554 create_process (proc
, (char **) new_argv
, current_dir
);
1559 return unbind_to (count
, proc
);
1562 /* This function is the unwind_protect form for Fstart_process. If
1563 PROC doesn't have its pid set, then we know someone has signaled
1564 an error and the process wasn't started successfully, so we should
1565 remove it from the process list. */
1567 start_process_unwind (Lisp_Object proc
)
1569 if (!PROCESSP (proc
))
1572 /* Was PROC started successfully?
1573 -2 is used for a pty with no process, eg for gdb. */
1574 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1575 remove_process (proc
);
1581 create_process_1 (struct atimer
*timer
)
1583 /* Nothing to do. */
1588 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1590 int inchannel
, outchannel
;
1593 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1594 int wait_child_setup
[2];
1599 /* Use volatile to protect variables from being clobbered by vfork. */
1600 volatile int forkin
, forkout
;
1601 volatile int pty_flag
= 0;
1602 volatile Lisp_Object lisp_pty_name
= Qnil
;
1603 volatile Lisp_Object encoded_current_dir
;
1604 #if HAVE_WORKING_VFORK
1605 char **volatile save_environ
;
1608 inchannel
= outchannel
= -1;
1611 if (!NILP (Vprocess_connection_type
))
1612 outchannel
= inchannel
= allocate_pty ();
1616 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1617 /* On most USG systems it does not work to open the pty's tty here,
1618 then close it and reopen it in the child. */
1620 /* Don't let this terminal become our controlling terminal
1621 (in case we don't have one). */
1622 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1624 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1627 report_file_error ("Opening pty", Qnil
);
1629 forkin
= forkout
= -1;
1630 #endif /* not USG, or USG_SUBTTY_WORKS */
1632 lisp_pty_name
= build_string (pty_name
);
1635 #endif /* HAVE_PTYS */
1640 report_file_error ("Creating pipe", Qnil
);
1646 emacs_close (inchannel
);
1647 emacs_close (forkout
);
1648 report_file_error ("Creating pipe", Qnil
);
1654 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1658 tem
= pipe (wait_child_setup
);
1660 report_file_error ("Creating pipe", Qnil
);
1661 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1663 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1666 emacs_close (wait_child_setup
[0]);
1667 emacs_close (wait_child_setup
[1]);
1668 report_file_error ("Setting file descriptor flags", Qnil
);
1674 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1675 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1678 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1679 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1683 /* Record this as an active process, with its channels.
1684 As a result, child_setup will close Emacs's side of the pipes. */
1685 chan_process
[inchannel
] = process
;
1686 XPROCESS (process
)->infd
= inchannel
;
1687 XPROCESS (process
)->outfd
= outchannel
;
1689 /* Previously we recorded the tty descriptor used in the subprocess.
1690 It was only used for getting the foreground tty process, so now
1691 we just reopen the device (see emacs_get_tty_pgrp) as this is
1692 more portable (see USG_SUBTTY_WORKS above). */
1694 XPROCESS (process
)->pty_flag
= pty_flag
;
1695 pset_status (XPROCESS (process
), Qrun
);
1697 FD_SET (inchannel
, &input_wait_mask
);
1698 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1699 if (inchannel
> max_process_desc
)
1700 max_process_desc
= inchannel
;
1702 /* Until we store the proper pid, enable the SIGCHLD handler
1703 to recognize an unknown pid as standing for this process.
1704 It is very important not to let this `marker' value stay
1705 in the table after this function has returned; if it does
1706 it might cause call-process to hang and subsequent asynchronous
1707 processes to get their return values scrambled. */
1708 XPROCESS (process
)->pid
= -1;
1710 /* This must be called after the above line because it may signal an
1712 setup_process_coding_systems (process
);
1714 encoded_current_dir
= ENCODE_FILE (current_dir
);
1719 /* Block SIGCHLD until we have a chance to store the new fork's
1720 pid in its process structure. */
1721 sigemptyset (&blocked
);
1722 sigaddset (&blocked
, SIGCHLD
);
1723 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1726 #if HAVE_WORKING_VFORK
1727 /* child_setup must clobber environ on systems with true vfork.
1728 Protect it from permanent change. */
1729 save_environ
= environ
;
1735 #endif /* not WINDOWSNT */
1737 int xforkin
= forkin
;
1738 int xforkout
= forkout
;
1740 /* Make the pty be the controlling terminal of the process. */
1742 /* First, disconnect its current controlling terminal. */
1744 /* We tried doing setsid only if pty_flag, but it caused
1745 process_set_signal to fail on SGI when using a pipe. */
1747 /* Make the pty's terminal the controlling terminal. */
1748 if (pty_flag
&& xforkin
>= 0)
1751 /* We ignore the return value
1752 because faith@cs.unc.edu says that is necessary on Linux. */
1753 ioctl (xforkin
, TIOCSCTTY
, 0);
1756 #else /* not HAVE_SETSID */
1758 /* It's very important to call setpgrp here and no time
1759 afterwards. Otherwise, we lose our controlling tty which
1760 is set when we open the pty. */
1763 #endif /* not HAVE_SETSID */
1764 #if defined (LDISC1)
1765 if (pty_flag
&& xforkin
>= 0)
1768 tcgetattr (xforkin
, &t
);
1770 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1771 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1774 #if defined (NTTYDISC) && defined (TIOCSETD)
1775 if (pty_flag
&& xforkin
>= 0)
1777 /* Use new line discipline. */
1778 int ldisc
= NTTYDISC
;
1779 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1784 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1785 can do TIOCSPGRP only to the process's controlling tty. */
1788 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1789 I can't test it since I don't have 4.3. */
1790 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1793 ioctl (j
, TIOCNOTTY
, 0);
1797 /* In order to get a controlling terminal on some versions
1798 of BSD, it is necessary to put the process in pgrp 0
1799 before it opens the terminal. */
1807 #endif /* TIOCNOTTY */
1809 #if !defined (DONT_REOPEN_PTY)
1810 /*** There is a suggestion that this ought to be a
1811 conditional on TIOCSPGRP,
1812 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1813 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1814 that system does seem to need this code, even though
1815 both HAVE_SETSID and TIOCSCTTY are defined. */
1816 /* Now close the pty (if we had it open) and reopen it.
1817 This makes the pty the controlling terminal of the subprocess. */
1821 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1824 emacs_close (xforkin
);
1825 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1829 emacs_write (1, "Couldn't open the pty terminal ", 31);
1830 emacs_write (1, pty_name
, strlen (pty_name
));
1831 emacs_write (1, "\n", 1);
1836 #endif /* not DONT_REOPEN_PTY */
1838 #ifdef SETUP_SLAVE_PTY
1843 #endif /* SETUP_SLAVE_PTY */
1845 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1846 Now reenable it in the child, so it will die when we want it to. */
1848 signal (SIGHUP
, SIG_DFL
);
1850 #endif /* HAVE_PTYS */
1852 signal (SIGINT
, SIG_DFL
);
1853 signal (SIGQUIT
, SIG_DFL
);
1855 /* Emacs ignores SIGPIPE, but the child should not. */
1856 signal (SIGPIPE
, SIG_DFL
);
1859 /* Stop blocking signals in the child. */
1860 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1864 child_setup_tty (xforkout
);
1866 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1867 new_argv
, 1, encoded_current_dir
);
1868 #else /* not WINDOWSNT */
1870 emacs_close (wait_child_setup
[0]);
1872 child_setup (xforkin
, xforkout
, xforkout
,
1873 new_argv
, 1, encoded_current_dir
);
1874 #endif /* not WINDOWSNT */
1877 /* Back in the parent process. */
1879 #if HAVE_WORKING_VFORK
1880 environ
= save_environ
;
1883 XPROCESS (process
)->pid
= pid
;
1885 /* Stop blocking signals in the parent. */
1887 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1894 emacs_close (forkin
);
1895 if (forkin
!= forkout
&& forkout
>= 0)
1896 emacs_close (forkout
);
1900 /* vfork succeeded. */
1903 register_child (pid
, inchannel
);
1904 #endif /* WINDOWSNT */
1906 /* If the subfork execv fails, and it exits,
1907 this close hangs. I don't know why.
1908 So have an interrupt jar it loose. */
1910 struct atimer
*timer
;
1911 EMACS_TIME offset
= make_emacs_time (1, 0);
1914 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1917 emacs_close (forkin
);
1919 cancel_atimer (timer
);
1923 if (forkin
!= forkout
&& forkout
>= 0)
1924 emacs_close (forkout
);
1926 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1928 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1929 /* Wait for child_setup to complete in case that vfork is
1930 actually defined as fork. The descriptor wait_child_setup[1]
1931 of a pipe is closed at the child side either by close-on-exec
1932 on successful execvp or the _exit call in child_setup. */
1936 emacs_close (wait_child_setup
[1]);
1937 emacs_read (wait_child_setup
[0], &dummy
, 1);
1938 emacs_close (wait_child_setup
[0]);
1943 /* Now generate the error if vfork failed. */
1945 report_file_error ("Doing vfork", Qnil
);
1949 create_pty (Lisp_Object process
)
1951 int inchannel
, outchannel
;
1954 inchannel
= outchannel
= -1;
1957 if (!NILP (Vprocess_connection_type
))
1958 outchannel
= inchannel
= allocate_pty ();
1962 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1963 /* On most USG systems it does not work to open the pty's tty here,
1964 then close it and reopen it in the child. */
1966 /* Don't let this terminal become our controlling terminal
1967 (in case we don't have one). */
1968 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1970 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1973 report_file_error ("Opening pty", Qnil
);
1974 #if defined (DONT_REOPEN_PTY)
1975 /* In the case that vfork is defined as fork, the parent process
1976 (Emacs) may send some data before the child process completes
1977 tty options setup. So we setup tty before forking. */
1978 child_setup_tty (forkout
);
1979 #endif /* DONT_REOPEN_PTY */
1980 #endif /* not USG, or USG_SUBTTY_WORKS */
1983 #endif /* HAVE_PTYS */
1986 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1987 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1990 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1991 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1995 /* Record this as an active process, with its channels.
1996 As a result, child_setup will close Emacs's side of the pipes. */
1997 chan_process
[inchannel
] = process
;
1998 XPROCESS (process
)->infd
= inchannel
;
1999 XPROCESS (process
)->outfd
= outchannel
;
2001 /* Previously we recorded the tty descriptor used in the subprocess.
2002 It was only used for getting the foreground tty process, so now
2003 we just reopen the device (see emacs_get_tty_pgrp) as this is
2004 more portable (see USG_SUBTTY_WORKS above). */
2006 XPROCESS (process
)->pty_flag
= pty_flag
;
2007 pset_status (XPROCESS (process
), Qrun
);
2008 setup_process_coding_systems (process
);
2010 FD_SET (inchannel
, &input_wait_mask
);
2011 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2012 if (inchannel
> max_process_desc
)
2013 max_process_desc
= inchannel
;
2015 XPROCESS (process
)->pid
= -2;
2018 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2021 pset_tty_name (XPROCESS (process
), Qnil
);
2025 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2026 The address family of sa is not included in the result. */
2029 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2031 Lisp_Object address
;
2034 register struct Lisp_Vector
*p
;
2036 /* Workaround for a bug in getsockname on BSD: Names bound to
2037 sockets in the UNIX domain are inaccessible; getsockname returns
2038 a zero length name. */
2039 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2040 return empty_unibyte_string
;
2042 switch (sa
->sa_family
)
2046 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2047 len
= sizeof (sin
->sin_addr
) + 1;
2048 address
= Fmake_vector (make_number (len
), Qnil
);
2049 p
= XVECTOR (address
);
2050 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2051 cp
= (unsigned char *) &sin
->sin_addr
;
2057 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2058 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2059 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2060 address
= Fmake_vector (make_number (len
), Qnil
);
2061 p
= XVECTOR (address
);
2062 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2063 for (i
= 0; i
< len
; i
++)
2064 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2068 #ifdef HAVE_LOCAL_SOCKETS
2071 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2072 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2073 if (sockun
->sun_path
[i
] == 0)
2075 return make_unibyte_string (sockun
->sun_path
, i
);
2079 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2080 address
= Fcons (make_number (sa
->sa_family
),
2081 Fmake_vector (make_number (len
), Qnil
));
2082 p
= XVECTOR (XCDR (address
));
2083 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2089 p
->contents
[i
++] = make_number (*cp
++);
2095 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2098 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2100 register struct Lisp_Vector
*p
;
2102 if (VECTORP (address
))
2104 p
= XVECTOR (address
);
2105 if (p
->header
.size
== 5)
2108 return sizeof (struct sockaddr_in
);
2111 else if (p
->header
.size
== 9)
2113 *familyp
= AF_INET6
;
2114 return sizeof (struct sockaddr_in6
);
2118 #ifdef HAVE_LOCAL_SOCKETS
2119 else if (STRINGP (address
))
2121 *familyp
= AF_LOCAL
;
2122 return sizeof (struct sockaddr_un
);
2125 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2126 && VECTORP (XCDR (address
)))
2128 struct sockaddr
*sa
;
2129 *familyp
= XINT (XCAR (address
));
2130 p
= XVECTOR (XCDR (address
));
2131 return p
->header
.size
+ sizeof (sa
->sa_family
);
2136 /* Convert an address object (vector or string) to an internal sockaddr.
2138 The address format has been basically validated by
2139 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2140 it could have come from user data. So if FAMILY is not valid,
2141 we return after zeroing *SA. */
2144 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2146 register struct Lisp_Vector
*p
;
2147 register unsigned char *cp
= NULL
;
2151 memset (sa
, 0, len
);
2153 if (VECTORP (address
))
2155 p
= XVECTOR (address
);
2156 if (family
== AF_INET
)
2158 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2159 len
= sizeof (sin
->sin_addr
) + 1;
2160 hostport
= XINT (p
->contents
[--len
]);
2161 sin
->sin_port
= htons (hostport
);
2162 cp
= (unsigned char *)&sin
->sin_addr
;
2163 sa
->sa_family
= family
;
2166 else if (family
== AF_INET6
)
2168 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2169 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2170 len
= sizeof (sin6
->sin6_addr
) + 1;
2171 hostport
= XINT (p
->contents
[--len
]);
2172 sin6
->sin6_port
= htons (hostport
);
2173 for (i
= 0; i
< len
; i
++)
2174 if (INTEGERP (p
->contents
[i
]))
2176 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2179 sa
->sa_family
= family
;
2186 else if (STRINGP (address
))
2188 #ifdef HAVE_LOCAL_SOCKETS
2189 if (family
== AF_LOCAL
)
2191 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2192 cp
= SDATA (address
);
2193 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2194 sockun
->sun_path
[i
] = *cp
++;
2195 sa
->sa_family
= family
;
2202 p
= XVECTOR (XCDR (address
));
2203 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2206 for (i
= 0; i
< len
; i
++)
2207 if (INTEGERP (p
->contents
[i
]))
2208 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2211 #ifdef DATAGRAM_SOCKETS
2212 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2214 doc
: /* Get the current datagram address associated with PROCESS. */)
2215 (Lisp_Object process
)
2219 CHECK_PROCESS (process
);
2221 if (!DATAGRAM_CONN_P (process
))
2224 channel
= XPROCESS (process
)->infd
;
2225 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2226 datagram_address
[channel
].len
);
2229 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2231 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2232 Returns nil upon error setting address, ADDRESS otherwise. */)
2233 (Lisp_Object process
, Lisp_Object address
)
2238 CHECK_PROCESS (process
);
2240 if (!DATAGRAM_CONN_P (process
))
2243 channel
= XPROCESS (process
)->infd
;
2245 len
= get_lisp_to_sockaddr_size (address
, &family
);
2246 if (datagram_address
[channel
].len
!= len
)
2248 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2254 static const struct socket_options
{
2255 /* The name of this option. Should be lowercase version of option
2256 name without SO_ prefix. */
2258 /* Option level SOL_... */
2260 /* Option number SO_... */
2262 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2263 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2264 } socket_options
[] =
2266 #ifdef SO_BINDTODEVICE
2267 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2270 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2273 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2276 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2279 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2282 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2285 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2288 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2290 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2293 /* Set option OPT to value VAL on socket S.
2295 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2296 Signals an error if setting a known option fails.
2300 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2303 const struct socket_options
*sopt
;
2308 name
= SSDATA (SYMBOL_NAME (opt
));
2309 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2310 if (strcmp (name
, sopt
->name
) == 0)
2313 switch (sopt
->opttype
)
2318 optval
= NILP (val
) ? 0 : 1;
2319 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2320 &optval
, sizeof (optval
));
2327 if (TYPE_RANGED_INTEGERP (int, val
))
2328 optval
= XINT (val
);
2330 error ("Bad option value for %s", name
);
2331 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2332 &optval
, sizeof (optval
));
2336 #ifdef SO_BINDTODEVICE
2339 char devname
[IFNAMSIZ
+1];
2341 /* This is broken, at least in the Linux 2.4 kernel.
2342 To unbind, the arg must be a zero integer, not the empty string.
2343 This should work on all systems. KFS. 2003-09-23. */
2344 memset (devname
, 0, sizeof devname
);
2347 char *arg
= SSDATA (val
);
2348 int len
= min (strlen (arg
), IFNAMSIZ
);
2349 memcpy (devname
, arg
, len
);
2351 else if (!NILP (val
))
2352 error ("Bad option value for %s", name
);
2353 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2362 struct linger linger
;
2365 linger
.l_linger
= 0;
2366 if (TYPE_RANGED_INTEGERP (int, val
))
2367 linger
.l_linger
= XINT (val
);
2369 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2370 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2371 &linger
, sizeof (linger
));
2381 report_file_error ("Cannot set network option",
2382 Fcons (opt
, Fcons (val
, Qnil
)));
2383 return (1 << sopt
->optbit
);
2387 DEFUN ("set-network-process-option",
2388 Fset_network_process_option
, Sset_network_process_option
,
2390 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2391 See `make-network-process' for a list of options and values.
2392 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2393 OPTION is not a supported option, return nil instead; otherwise return t. */)
2394 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2397 struct Lisp_Process
*p
;
2399 CHECK_PROCESS (process
);
2400 p
= XPROCESS (process
);
2401 if (!NETCONN1_P (p
))
2402 error ("Process is not a network process");
2406 error ("Process is not running");
2408 if (set_socket_option (s
, option
, value
))
2410 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2414 if (NILP (no_error
))
2415 error ("Unknown or unsupported option");
2421 DEFUN ("serial-process-configure",
2422 Fserial_process_configure
,
2423 Sserial_process_configure
,
2425 doc
: /* Configure speed, bytesize, etc. of a serial process.
2427 Arguments are specified as keyword/argument pairs. Attributes that
2428 are not given are re-initialized from the process's current
2429 configuration (available via the function `process-contact') or set to
2430 reasonable default values. The following arguments are defined:
2436 -- Any of these arguments can be given to identify the process that is
2437 to be configured. If none of these arguments is given, the current
2438 buffer's process is used.
2440 :speed SPEED -- SPEED is the speed of the serial port in bits per
2441 second, also called baud rate. Any value can be given for SPEED, but
2442 most serial ports work only at a few defined values between 1200 and
2443 115200, with 9600 being the most common value. If SPEED is nil, the
2444 serial port is not configured any further, i.e., all other arguments
2445 are ignored. This may be useful for special serial ports such as
2446 Bluetooth-to-serial converters which can only be configured through AT
2447 commands. A value of nil for SPEED can be used only when passed
2448 through `make-serial-process' or `serial-term'.
2450 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2451 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2453 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2454 `odd' (use odd parity), or the symbol `even' (use even parity). If
2455 PARITY is not given, no parity is used.
2457 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2458 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2459 is not given or nil, 1 stopbit is used.
2461 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2462 flowcontrol to be used, which is either nil (don't use flowcontrol),
2463 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2464 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2465 flowcontrol is used.
2467 `serial-process-configure' is called by `make-serial-process' for the
2468 initial configuration of the serial port.
2472 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2474 \(serial-process-configure
2475 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2477 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2479 usage: (serial-process-configure &rest ARGS) */)
2480 (ptrdiff_t nargs
, Lisp_Object
*args
)
2482 struct Lisp_Process
*p
;
2483 Lisp_Object contact
= Qnil
;
2484 Lisp_Object proc
= Qnil
;
2485 struct gcpro gcpro1
;
2487 contact
= Flist (nargs
, args
);
2490 proc
= Fplist_get (contact
, QCprocess
);
2492 proc
= Fplist_get (contact
, QCname
);
2494 proc
= Fplist_get (contact
, QCbuffer
);
2496 proc
= Fplist_get (contact
, QCport
);
2497 proc
= get_process (proc
);
2498 p
= XPROCESS (proc
);
2499 if (!EQ (p
->type
, Qserial
))
2500 error ("Not a serial process");
2502 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2508 serial_configure (p
, contact
);
2514 /* Used by make-serial-process to recover from errors. */
2516 make_serial_process_unwind (Lisp_Object proc
)
2518 if (!PROCESSP (proc
))
2520 remove_process (proc
);
2524 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2526 doc
: /* Create and return a serial port process.
2528 In Emacs, serial port connections are represented by process objects,
2529 so input and output work as for subprocesses, and `delete-process'
2530 closes a serial port connection. However, a serial process has no
2531 process id, it cannot be signaled, and the status codes are different
2532 from normal processes.
2534 `make-serial-process' creates a process and a buffer, on which you
2535 probably want to use `process-send-string'. Try \\[serial-term] for
2536 an interactive terminal. See below for examples.
2538 Arguments are specified as keyword/argument pairs. The following
2539 arguments are defined:
2541 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2542 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2543 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2544 the backslashes in strings).
2546 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2547 which this function calls.
2549 :name NAME -- NAME is the name of the process. If NAME is not given,
2550 the value of PORT is used.
2552 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2553 with the process. Process output goes at the end of that buffer,
2554 unless you specify an output stream or filter function to handle the
2555 output. If BUFFER is not given, the value of NAME is used.
2557 :coding CODING -- If CODING is a symbol, it specifies the coding
2558 system used for both reading and writing for this process. If CODING
2559 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2560 ENCODING is used for writing.
2562 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2563 the process is running. If BOOL is not given, query before exiting.
2565 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2566 In the stopped state, a serial process does not accept incoming data,
2567 but you can send outgoing data. The stopped state is cleared by
2568 `continue-process' and set by `stop-process'.
2570 :filter FILTER -- Install FILTER as the process filter.
2572 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2574 :plist PLIST -- Install PLIST as the initial plist of the process.
2580 -- This function calls `serial-process-configure' to handle these
2583 The original argument list, possibly modified by later configuration,
2584 is available via the function `process-contact'.
2588 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2590 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2592 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2594 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2596 usage: (make-serial-process &rest ARGS) */)
2597 (ptrdiff_t nargs
, Lisp_Object
*args
)
2600 Lisp_Object proc
, contact
, port
;
2601 struct Lisp_Process
*p
;
2602 struct gcpro gcpro1
;
2603 Lisp_Object name
, buffer
;
2604 Lisp_Object tem
, val
;
2605 ptrdiff_t specpdl_count
= -1;
2610 contact
= Flist (nargs
, args
);
2613 port
= Fplist_get (contact
, QCport
);
2615 error ("No port specified");
2616 CHECK_STRING (port
);
2618 if (NILP (Fplist_member (contact
, QCspeed
)))
2619 error (":speed not specified");
2620 if (!NILP (Fplist_get (contact
, QCspeed
)))
2621 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2623 name
= Fplist_get (contact
, QCname
);
2626 CHECK_STRING (name
);
2627 proc
= make_process (name
);
2628 specpdl_count
= SPECPDL_INDEX ();
2629 record_unwind_protect (make_serial_process_unwind
, proc
);
2630 p
= XPROCESS (proc
);
2632 fd
= serial_open (SSDATA (port
));
2635 if (fd
> max_process_desc
)
2636 max_process_desc
= fd
;
2637 chan_process
[fd
] = proc
;
2639 buffer
= Fplist_get (contact
, QCbuffer
);
2642 buffer
= Fget_buffer_create (buffer
);
2643 pset_buffer (p
, buffer
);
2645 pset_childp (p
, contact
);
2646 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2647 pset_type (p
, Qserial
);
2648 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2649 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2651 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2652 p
->kill_without_query
= 1;
2653 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2654 pset_command (p
, Qt
);
2657 if (!EQ (p
->command
, Qt
))
2659 FD_SET (fd
, &input_wait_mask
);
2660 FD_SET (fd
, &non_keyboard_wait_mask
);
2663 if (BUFFERP (buffer
))
2665 set_marker_both (p
->mark
, buffer
,
2666 BUF_ZV (XBUFFER (buffer
)),
2667 BUF_ZV_BYTE (XBUFFER (buffer
)));
2670 tem
= Fplist_member (contact
, QCcoding
);
2671 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2677 val
= XCAR (XCDR (tem
));
2681 else if (!NILP (Vcoding_system_for_read
))
2682 val
= Vcoding_system_for_read
;
2683 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2684 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2686 pset_decode_coding_system (p
, val
);
2691 val
= XCAR (XCDR (tem
));
2695 else if (!NILP (Vcoding_system_for_write
))
2696 val
= Vcoding_system_for_write
;
2697 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2698 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2700 pset_encode_coding_system (p
, val
);
2702 setup_process_coding_systems (proc
);
2703 pset_decoding_buf (p
, empty_unibyte_string
);
2704 p
->decoding_carryover
= 0;
2705 pset_encoding_buf (p
, empty_unibyte_string
);
2706 p
->inherit_coding_system_flag
2707 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2709 Fserial_process_configure (nargs
, args
);
2711 specpdl_ptr
= specpdl
+ specpdl_count
;
2717 /* Create a network stream/datagram client/server process. Treated
2718 exactly like a normal process when reading and writing. Primary
2719 differences are in status display and process deletion. A network
2720 connection has no PID; you cannot signal it. All you can do is
2721 stop/continue it and deactivate/close it via delete-process */
2723 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2725 doc
: /* Create and return a network server or client process.
2727 In Emacs, network connections are represented by process objects, so
2728 input and output work as for subprocesses and `delete-process' closes
2729 a network connection. However, a network process has no process id,
2730 it cannot be signaled, and the status codes are different from normal
2733 Arguments are specified as keyword/argument pairs. The following
2734 arguments are defined:
2736 :name NAME -- NAME is name for process. It is modified if necessary
2739 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2740 with the process. Process output goes at end of that buffer, unless
2741 you specify an output stream or filter function to handle the output.
2742 BUFFER may be also nil, meaning that this process is not associated
2745 :host HOST -- HOST is name of the host to connect to, or its IP
2746 address. The symbol `local' specifies the local host. If specified
2747 for a server process, it must be a valid name or address for the local
2748 host, and only clients connecting to that address will be accepted.
2750 :service SERVICE -- SERVICE is name of the service desired, or an
2751 integer specifying a port number to connect to. If SERVICE is t,
2752 a random port number is selected for the server. (If Emacs was
2753 compiled with getaddrinfo, a port number can also be specified as a
2754 string, e.g. "80", as well as an integer. This is not portable.)
2756 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2757 stream type connection, `datagram' creates a datagram type connection,
2758 `seqpacket' creates a reliable datagram connection.
2760 :family FAMILY -- FAMILY is the address (and protocol) family for the
2761 service specified by HOST and SERVICE. The default (nil) is to use
2762 whatever address family (IPv4 or IPv6) that is defined for the host
2763 and port number specified by HOST and SERVICE. Other address families
2765 local -- for a local (i.e. UNIX) address specified by SERVICE.
2766 ipv4 -- use IPv4 address family only.
2767 ipv6 -- use IPv6 address family only.
2769 :local ADDRESS -- ADDRESS is the local address used for the connection.
2770 This parameter is ignored when opening a client process. When specified
2771 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2773 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2774 connection. This parameter is ignored when opening a stream server
2775 process. For a datagram server process, it specifies the initial
2776 setting of the remote datagram address. When specified for a client
2777 process, the FAMILY, HOST, and SERVICE args are ignored.
2779 The format of ADDRESS depends on the address family:
2780 - An IPv4 address is represented as an vector of integers [A B C D P]
2781 corresponding to numeric IP address A.B.C.D and port number P.
2782 - A local address is represented as a string with the address in the
2783 local address space.
2784 - An "unsupported family" address is represented by a cons (F . AV)
2785 where F is the family number and AV is a vector containing the socket
2786 address data with one element per address data byte. Do not rely on
2787 this format in portable code, as it may depend on implementation
2788 defined constants, data sizes, and data structure alignment.
2790 :coding CODING -- If CODING is a symbol, it specifies the coding
2791 system used for both reading and writing for this process. If CODING
2792 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2793 ENCODING is used for writing.
2795 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2796 return without waiting for the connection to complete; instead, the
2797 sentinel function will be called with second arg matching "open" (if
2798 successful) or "failed" when the connect completes. Default is to use
2799 a blocking connect (i.e. wait) for stream type connections.
2801 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2802 running when Emacs is exited.
2804 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2805 In the stopped state, a server process does not accept new
2806 connections, and a client process does not handle incoming traffic.
2807 The stopped state is cleared by `continue-process' and set by
2810 :filter FILTER -- Install FILTER as the process filter.
2812 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2813 process filter are multibyte, otherwise they are unibyte.
2814 If this keyword is not specified, the strings are multibyte if
2815 the default value of `enable-multibyte-characters' is non-nil.
2817 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2819 :log LOG -- Install LOG as the server process log function. This
2820 function is called when the server accepts a network connection from a
2821 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2822 is the server process, CLIENT is the new process for the connection,
2823 and MESSAGE is a string.
2825 :plist PLIST -- Install PLIST as the new process' initial plist.
2827 :server QLEN -- if QLEN is non-nil, create a server process for the
2828 specified FAMILY, SERVICE, and connection type (stream or datagram).
2829 If QLEN is an integer, it is used as the max. length of the server's
2830 pending connection queue (also known as the backlog); the default
2831 queue length is 5. Default is to create a client process.
2833 The following network options can be specified for this connection:
2835 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2836 :dontroute BOOL -- Only send to directly connected hosts.
2837 :keepalive BOOL -- Send keep-alive messages on network stream.
2838 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2839 :oobinline BOOL -- Place out-of-band data in receive data stream.
2840 :priority INT -- Set protocol defined priority for sent packets.
2841 :reuseaddr BOOL -- Allow reusing a recently used local address
2842 (this is allowed by default for a server process).
2843 :bindtodevice NAME -- bind to interface NAME. Using this may require
2844 special privileges on some systems.
2846 Consult the relevant system programmer's manual pages for more
2847 information on using these options.
2850 A server process will listen for and accept connections from clients.
2851 When a client connection is accepted, a new network process is created
2852 for the connection with the following parameters:
2854 - The client's process name is constructed by concatenating the server
2855 process' NAME and a client identification string.
2856 - If the FILTER argument is non-nil, the client process will not get a
2857 separate process buffer; otherwise, the client's process buffer is a newly
2858 created buffer named after the server process' BUFFER name or process
2859 NAME concatenated with the client identification string.
2860 - The connection type and the process filter and sentinel parameters are
2861 inherited from the server process' TYPE, FILTER and SENTINEL.
2862 - The client process' contact info is set according to the client's
2863 addressing information (typically an IP address and a port number).
2864 - The client process' plist is initialized from the server's plist.
2866 Notice that the FILTER and SENTINEL args are never used directly by
2867 the server process. Also, the BUFFER argument is not used directly by
2868 the server process, but via the optional :log function, accepted (and
2869 failed) connections may be logged in the server process' buffer.
2871 The original argument list, modified with the actual connection
2872 information, is available via the `process-contact' function.
2874 usage: (make-network-process &rest ARGS) */)
2875 (ptrdiff_t nargs
, Lisp_Object
*args
)
2878 Lisp_Object contact
;
2879 struct Lisp_Process
*p
;
2880 #ifdef HAVE_GETADDRINFO
2881 struct addrinfo ai
, *res
, *lres
;
2882 struct addrinfo hints
;
2883 const char *portstring
;
2885 #else /* HAVE_GETADDRINFO */
2886 struct _emacs_addrinfo
2892 struct sockaddr
*ai_addr
;
2893 struct _emacs_addrinfo
*ai_next
;
2895 #endif /* HAVE_GETADDRINFO */
2896 struct sockaddr_in address_in
;
2897 #ifdef HAVE_LOCAL_SOCKETS
2898 struct sockaddr_un address_un
;
2903 int s
= -1, outch
, inch
;
2904 struct gcpro gcpro1
;
2905 ptrdiff_t count
= SPECPDL_INDEX ();
2907 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2909 Lisp_Object name
, buffer
, host
, service
, address
;
2910 Lisp_Object filter
, sentinel
;
2911 int is_non_blocking_client
= 0;
2912 int is_server
= 0, backlog
= 5;
2919 /* Save arguments for process-contact and clone-process. */
2920 contact
= Flist (nargs
, args
);
2924 /* Ensure socket support is loaded if available. */
2925 init_winsock (TRUE
);
2928 /* :type TYPE (nil: stream, datagram */
2929 tem
= Fplist_get (contact
, QCtype
);
2931 socktype
= SOCK_STREAM
;
2932 #ifdef DATAGRAM_SOCKETS
2933 else if (EQ (tem
, Qdatagram
))
2934 socktype
= SOCK_DGRAM
;
2936 #ifdef HAVE_SEQPACKET
2937 else if (EQ (tem
, Qseqpacket
))
2938 socktype
= SOCK_SEQPACKET
;
2941 error ("Unsupported connection type");
2944 tem
= Fplist_get (contact
, QCserver
);
2947 /* Don't support network sockets when non-blocking mode is
2948 not available, since a blocked Emacs is not useful. */
2949 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2950 error ("Network servers not supported");
2953 if (TYPE_RANGED_INTEGERP (int, tem
))
2954 backlog
= XINT (tem
);
2958 /* Make QCaddress an alias for :local (server) or :remote (client). */
2959 QCaddress
= is_server
? QClocal
: QCremote
;
2962 if (!is_server
&& socktype
!= SOCK_DGRAM
2963 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2965 #ifndef NON_BLOCKING_CONNECT
2966 error ("Non-blocking connect not supported");
2968 is_non_blocking_client
= 1;
2972 name
= Fplist_get (contact
, QCname
);
2973 buffer
= Fplist_get (contact
, QCbuffer
);
2974 filter
= Fplist_get (contact
, QCfilter
);
2975 sentinel
= Fplist_get (contact
, QCsentinel
);
2977 CHECK_STRING (name
);
2979 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2980 ai
.ai_socktype
= socktype
;
2985 /* :local ADDRESS or :remote ADDRESS */
2986 address
= Fplist_get (contact
, QCaddress
);
2987 if (!NILP (address
))
2989 host
= service
= Qnil
;
2991 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2992 error ("Malformed :address");
2993 ai
.ai_family
= family
;
2994 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2995 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2999 /* :family FAMILY -- nil (for Inet), local, or integer. */
3000 tem
= Fplist_get (contact
, QCfamily
);
3003 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3009 #ifdef HAVE_LOCAL_SOCKETS
3010 else if (EQ (tem
, Qlocal
))
3014 else if (EQ (tem
, Qipv6
))
3017 else if (EQ (tem
, Qipv4
))
3019 else if (TYPE_RANGED_INTEGERP (int, tem
))
3020 family
= XINT (tem
);
3022 error ("Unknown address family");
3024 ai
.ai_family
= family
;
3026 /* :service SERVICE -- string, integer (port number), or t (random port). */
3027 service
= Fplist_get (contact
, QCservice
);
3029 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3030 host
= Fplist_get (contact
, QChost
);
3033 if (EQ (host
, Qlocal
))
3034 /* Depending on setup, "localhost" may map to different IPv4 and/or
3035 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3036 host
= build_string ("127.0.0.1");
3037 CHECK_STRING (host
);
3040 #ifdef HAVE_LOCAL_SOCKETS
3041 if (family
== AF_LOCAL
)
3045 message (":family local ignores the :host \"%s\" property",
3047 contact
= Fplist_put (contact
, QChost
, Qnil
);
3050 CHECK_STRING (service
);
3051 memset (&address_un
, 0, sizeof address_un
);
3052 address_un
.sun_family
= AF_LOCAL
;
3053 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3054 error ("Service name too long");
3055 strcpy (address_un
.sun_path
, SSDATA (service
));
3056 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3057 ai
.ai_addrlen
= sizeof address_un
;
3062 /* Slow down polling to every ten seconds.
3063 Some kernels have a bug which causes retrying connect to fail
3064 after a connect. Polling can interfere with gethostbyname too. */
3065 #ifdef POLL_FOR_INPUT
3066 if (socktype
!= SOCK_DGRAM
)
3068 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3069 bind_polling_period (10);
3073 #ifdef HAVE_GETADDRINFO
3074 /* If we have a host, use getaddrinfo to resolve both host and service.
3075 Otherwise, use getservbyname to lookup the service. */
3079 /* SERVICE can either be a string or int.
3080 Convert to a C string for later use by getaddrinfo. */
3081 if (EQ (service
, Qt
))
3083 else if (INTEGERP (service
))
3085 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3086 portstring
= portbuf
;
3090 CHECK_STRING (service
);
3091 portstring
= SSDATA (service
);
3096 memset (&hints
, 0, sizeof (hints
));
3098 hints
.ai_family
= family
;
3099 hints
.ai_socktype
= socktype
;
3100 hints
.ai_protocol
= 0;
3102 #ifdef HAVE_RES_INIT
3106 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3108 #ifdef HAVE_GAI_STRERROR
3109 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3111 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3117 #endif /* HAVE_GETADDRINFO */
3119 /* We end up here if getaddrinfo is not defined, or in case no hostname
3120 has been specified (e.g. for a local server process). */
3122 if (EQ (service
, Qt
))
3124 else if (INTEGERP (service
))
3125 port
= htons ((unsigned short) XINT (service
));
3128 struct servent
*svc_info
;
3129 CHECK_STRING (service
);
3130 svc_info
= getservbyname (SSDATA (service
),
3131 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3133 error ("Unknown service: %s", SDATA (service
));
3134 port
= svc_info
->s_port
;
3137 memset (&address_in
, 0, sizeof address_in
);
3138 address_in
.sin_family
= family
;
3139 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3140 address_in
.sin_port
= port
;
3142 #ifndef HAVE_GETADDRINFO
3145 struct hostent
*host_info_ptr
;
3147 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3148 as it may `hang' Emacs for a very long time. */
3152 #ifdef HAVE_RES_INIT
3156 host_info_ptr
= gethostbyname (SDATA (host
));
3161 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3162 host_info_ptr
->h_length
);
3163 family
= host_info_ptr
->h_addrtype
;
3164 address_in
.sin_family
= family
;
3167 /* Attempt to interpret host as numeric inet address */
3169 unsigned long numeric_addr
;
3170 numeric_addr
= inet_addr (SSDATA (host
));
3171 if (numeric_addr
== -1)
3172 error ("Unknown host \"%s\"", SDATA (host
));
3174 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3175 sizeof (address_in
.sin_addr
));
3179 #endif /* not HAVE_GETADDRINFO */
3181 ai
.ai_family
= family
;
3182 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3183 ai
.ai_addrlen
= sizeof address_in
;
3187 /* Do this in case we never enter the for-loop below. */
3188 count1
= SPECPDL_INDEX ();
3191 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3200 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3207 #ifdef DATAGRAM_SOCKETS
3208 if (!is_server
&& socktype
== SOCK_DGRAM
)
3210 #endif /* DATAGRAM_SOCKETS */
3212 #ifdef NON_BLOCKING_CONNECT
3213 if (is_non_blocking_client
)
3216 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3218 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3230 /* Make us close S if quit. */
3231 record_unwind_protect (close_file_unwind
, make_number (s
));
3233 /* Parse network options in the arg list.
3234 We simply ignore anything which isn't a known option (including other keywords).
3235 An error is signaled if setting a known option fails. */
3236 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3237 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3241 /* Configure as a server socket. */
3243 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3244 explicit :reuseaddr key to override this. */
3245 #ifdef HAVE_LOCAL_SOCKETS
3246 if (family
!= AF_LOCAL
)
3248 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3251 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3252 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3255 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3256 report_file_error ("Cannot bind server socket", Qnil
);
3258 #ifdef HAVE_GETSOCKNAME
3259 if (EQ (service
, Qt
))
3261 struct sockaddr_in sa1
;
3262 socklen_t len1
= sizeof (sa1
);
3263 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3265 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3266 service
= make_number (ntohs (sa1
.sin_port
));
3267 contact
= Fplist_put (contact
, QCservice
, service
);
3272 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3273 report_file_error ("Cannot listen on server socket", Qnil
);
3281 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3284 if (ret
== 0 || xerrno
== EISCONN
)
3286 /* The unwind-protect will be discarded afterwards.
3287 Likewise for immediate_quit. */
3291 #ifdef NON_BLOCKING_CONNECT
3293 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3297 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3304 if (xerrno
== EINTR
)
3306 /* Unlike most other syscalls connect() cannot be called
3307 again. (That would return EALREADY.) The proper way to
3308 wait for completion is pselect(). */
3316 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3322 report_file_error ("select failed", Qnil
);
3326 len
= sizeof xerrno
;
3327 eassert (FD_ISSET (s
, &fdset
));
3328 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3329 report_file_error ("getsockopt failed", Qnil
);
3331 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3335 #endif /* !WINDOWSNT */
3339 /* Discard the unwind protect closing S. */
3340 specpdl_ptr
= specpdl
+ count1
;
3345 if (xerrno
== EINTR
)
3352 #ifdef DATAGRAM_SOCKETS
3353 if (socktype
== SOCK_DGRAM
)
3355 if (datagram_address
[s
].sa
)
3357 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3358 datagram_address
[s
].len
= lres
->ai_addrlen
;
3362 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3363 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3366 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3367 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3368 conv_lisp_to_sockaddr (rfamily
, remote
,
3369 datagram_address
[s
].sa
, rlen
);
3373 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3376 contact
= Fplist_put (contact
, QCaddress
,
3377 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3378 #ifdef HAVE_GETSOCKNAME
3381 struct sockaddr_in sa1
;
3382 socklen_t len1
= sizeof (sa1
);
3383 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3384 contact
= Fplist_put (contact
, QClocal
,
3385 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3392 #ifdef HAVE_GETADDRINFO
3401 /* Discard the unwind protect for closing S, if any. */
3402 specpdl_ptr
= specpdl
+ count1
;
3404 /* Unwind bind_polling_period and request_sigio. */
3405 unbind_to (count
, Qnil
);
3409 /* If non-blocking got this far - and failed - assume non-blocking is
3410 not supported after all. This is probably a wrong assumption, but
3411 the normal blocking calls to open-network-stream handles this error
3413 if (is_non_blocking_client
)
3418 report_file_error ("make server process failed", contact
);
3420 report_file_error ("make client process failed", contact
);
3427 buffer
= Fget_buffer_create (buffer
);
3428 proc
= make_process (name
);
3430 chan_process
[inch
] = proc
;
3433 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3436 fcntl (inch
, F_SETFL
, O_NDELAY
);
3440 p
= XPROCESS (proc
);
3442 pset_childp (p
, contact
);
3443 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3444 pset_type (p
, Qnetwork
);
3446 pset_buffer (p
, buffer
);
3447 pset_sentinel (p
, sentinel
);
3448 pset_filter (p
, filter
);
3449 pset_log (p
, Fplist_get (contact
, QClog
));
3450 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3451 p
->kill_without_query
= 1;
3452 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3453 pset_command (p
, Qt
);
3457 if (is_server
&& socktype
!= SOCK_DGRAM
)
3458 pset_status (p
, Qlisten
);
3460 /* Make the process marker point into the process buffer (if any). */
3461 if (BUFFERP (buffer
))
3462 set_marker_both (p
->mark
, buffer
,
3463 BUF_ZV (XBUFFER (buffer
)),
3464 BUF_ZV_BYTE (XBUFFER (buffer
)));
3466 #ifdef NON_BLOCKING_CONNECT
3467 if (is_non_blocking_client
)
3469 /* We may get here if connect did succeed immediately. However,
3470 in that case, we still need to signal this like a non-blocking
3472 pset_status (p
, Qconnect
);
3473 if (!FD_ISSET (inch
, &connect_wait_mask
))
3475 FD_SET (inch
, &connect_wait_mask
);
3476 FD_SET (inch
, &write_mask
);
3477 num_pending_connects
++;
3482 /* A server may have a client filter setting of Qt, but it must
3483 still listen for incoming connects unless it is stopped. */
3484 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3485 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3487 FD_SET (inch
, &input_wait_mask
);
3488 FD_SET (inch
, &non_keyboard_wait_mask
);
3491 if (inch
> max_process_desc
)
3492 max_process_desc
= inch
;
3494 tem
= Fplist_member (contact
, QCcoding
);
3495 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3496 tem
= Qnil
; /* No error message (too late!). */
3499 /* Setup coding systems for communicating with the network stream. */
3500 struct gcpro gcpro1
;
3501 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3502 Lisp_Object coding_systems
= Qt
;
3503 Lisp_Object fargs
[5], val
;
3507 val
= XCAR (XCDR (tem
));
3511 else if (!NILP (Vcoding_system_for_read
))
3512 val
= Vcoding_system_for_read
;
3513 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3514 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3515 /* We dare not decode end-of-line format by setting VAL to
3516 Qraw_text, because the existing Emacs Lisp libraries
3517 assume that they receive bare code including a sequence of
3522 if (NILP (host
) || NILP (service
))
3523 coding_systems
= Qnil
;
3526 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3527 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3529 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3532 if (CONSP (coding_systems
))
3533 val
= XCAR (coding_systems
);
3534 else if (CONSP (Vdefault_process_coding_system
))
3535 val
= XCAR (Vdefault_process_coding_system
);
3539 pset_decode_coding_system (p
, val
);
3543 val
= XCAR (XCDR (tem
));
3547 else if (!NILP (Vcoding_system_for_write
))
3548 val
= Vcoding_system_for_write
;
3549 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3553 if (EQ (coding_systems
, Qt
))
3555 if (NILP (host
) || NILP (service
))
3556 coding_systems
= Qnil
;
3559 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3560 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3562 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3566 if (CONSP (coding_systems
))
3567 val
= XCDR (coding_systems
);
3568 else if (CONSP (Vdefault_process_coding_system
))
3569 val
= XCDR (Vdefault_process_coding_system
);
3573 pset_encode_coding_system (p
, val
);
3575 setup_process_coding_systems (proc
);
3577 pset_decoding_buf (p
, empty_unibyte_string
);
3578 p
->decoding_carryover
= 0;
3579 pset_encoding_buf (p
, empty_unibyte_string
);
3581 p
->inherit_coding_system_flag
3582 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3589 #if defined (HAVE_NET_IF_H)
3592 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3593 doc
: /* Return an alist of all network interfaces and their network address.
3594 Each element is a cons, the car of which is a string containing the
3595 interface name, and the cdr is the network address in internal
3596 format; see the description of ADDRESS in `make-network-process'. */)
3599 struct ifconf ifconf
;
3600 struct ifreq
*ifreq
;
3602 ptrdiff_t buf_size
= 512;
3606 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3612 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3613 ifconf
.ifc_buf
= buf
;
3614 ifconf
.ifc_len
= buf_size
;
3615 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3622 while (ifconf
.ifc_len
== buf_size
);
3627 ifreq
= ifconf
.ifc_req
;
3628 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3630 struct ifreq
*ifq
= ifreq
;
3631 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3632 #define SIZEOF_IFREQ(sif) \
3633 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3634 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3636 int len
= SIZEOF_IFREQ (ifq
);
3638 int len
= sizeof (*ifreq
);
3640 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3642 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3644 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3647 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3648 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3649 res
= Fcons (Fcons (build_string (namebuf
),
3650 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3651 sizeof (struct sockaddr
))),
3658 #endif /* SIOCGIFCONF */
3660 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3664 const char *flag_sym
;
3667 static const struct ifflag_def ifflag_table
[] = {
3671 #ifdef IFF_BROADCAST
3672 { IFF_BROADCAST
, "broadcast" },
3675 { IFF_DEBUG
, "debug" },
3678 { IFF_LOOPBACK
, "loopback" },
3680 #ifdef IFF_POINTOPOINT
3681 { IFF_POINTOPOINT
, "pointopoint" },
3684 { IFF_RUNNING
, "running" },
3687 { IFF_NOARP
, "noarp" },
3690 { IFF_PROMISC
, "promisc" },
3692 #ifdef IFF_NOTRAILERS
3693 #ifdef NS_IMPL_COCOA
3694 /* Really means smart, notrailers is obsolete */
3695 { IFF_NOTRAILERS
, "smart" },
3697 { IFF_NOTRAILERS
, "notrailers" },
3701 { IFF_ALLMULTI
, "allmulti" },
3704 { IFF_MASTER
, "master" },
3707 { IFF_SLAVE
, "slave" },
3709 #ifdef IFF_MULTICAST
3710 { IFF_MULTICAST
, "multicast" },
3713 { IFF_PORTSEL
, "portsel" },
3715 #ifdef IFF_AUTOMEDIA
3716 { IFF_AUTOMEDIA
, "automedia" },
3719 { IFF_DYNAMIC
, "dynamic" },
3722 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3725 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3728 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3731 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3734 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3739 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3740 doc
: /* Return information about network interface named IFNAME.
3741 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3742 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3743 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3744 FLAGS is the current flags of the interface. */)
3745 (Lisp_Object ifname
)
3748 Lisp_Object res
= Qnil
;
3752 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3753 && defined HAVE_GETIFADDRS && defined LLADDR)
3754 struct ifaddrs
*ifap
;
3757 CHECK_STRING (ifname
);
3759 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3760 error ("interface name too long");
3761 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3763 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3768 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3769 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3771 int flags
= rq
.ifr_flags
;
3772 const struct ifflag_def
*fp
;
3775 /* If flags is smaller than int (i.e. short) it may have the high bit set
3776 due to IFF_MULTICAST. In that case, sign extending it into
3778 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3779 flags
= (unsigned short) rq
.ifr_flags
;
3782 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3784 if (flags
& fp
->flag_bit
)
3786 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3787 flags
-= fp
->flag_bit
;
3790 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3794 elt
= Fcons (make_number (fnum
), elt
);
3799 res
= Fcons (elt
, res
);
3802 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3803 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3805 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3806 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3810 for (n
= 0; n
< 6; n
++)
3811 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3812 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3814 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3815 if (getifaddrs (&ifap
) != -1)
3817 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3818 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3821 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3823 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3824 unsigned char linkaddr
[6];
3827 if (it
->ifa_addr
->sa_family
!= AF_LINK
3828 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3829 || sdl
->sdl_alen
!= 6)
3832 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3833 for (n
= 0; n
< 6; n
++)
3834 p
->contents
[n
] = make_number (linkaddr
[n
]);
3836 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3840 #ifdef HAVE_FREEIFADDRS
3844 #endif /* HAVE_GETIFADDRS && LLADDR */
3846 res
= Fcons (elt
, res
);
3849 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3850 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3853 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3854 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3856 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3860 res
= Fcons (elt
, res
);
3863 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3864 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3867 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3870 res
= Fcons (elt
, res
);
3873 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3874 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3877 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3880 res
= Fcons (elt
, res
);
3884 return any
? res
: Qnil
;
3887 #endif /* defined (HAVE_NET_IF_H) */
3889 /* Turn off input and output for process PROC. */
3892 deactivate_process (Lisp_Object proc
)
3894 register int inchannel
, outchannel
;
3895 register struct Lisp_Process
*p
= XPROCESS (proc
);
3898 /* Delete GnuTLS structures in PROC, if any. */
3899 emacs_gnutls_deinit (proc
);
3900 #endif /* HAVE_GNUTLS */
3902 inchannel
= p
->infd
;
3903 outchannel
= p
->outfd
;
3905 #ifdef ADAPTIVE_READ_BUFFERING
3906 if (p
->read_output_delay
> 0)
3908 if (--process_output_delay_count
< 0)
3909 process_output_delay_count
= 0;
3910 p
->read_output_delay
= 0;
3911 p
->read_output_skip
= 0;
3917 /* Beware SIGCHLD hereabouts. */
3918 flush_pending_output (inchannel
);
3919 emacs_close (inchannel
);
3920 if (outchannel
>= 0 && outchannel
!= inchannel
)
3921 emacs_close (outchannel
);
3925 #ifdef DATAGRAM_SOCKETS
3926 if (DATAGRAM_CHAN_P (inchannel
))
3928 xfree (datagram_address
[inchannel
].sa
);
3929 datagram_address
[inchannel
].sa
= 0;
3930 datagram_address
[inchannel
].len
= 0;
3933 chan_process
[inchannel
] = Qnil
;
3934 FD_CLR (inchannel
, &input_wait_mask
);
3935 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3936 #ifdef NON_BLOCKING_CONNECT
3937 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3939 FD_CLR (inchannel
, &connect_wait_mask
);
3940 FD_CLR (inchannel
, &write_mask
);
3941 if (--num_pending_connects
< 0)
3945 if (inchannel
== max_process_desc
)
3948 /* We just closed the highest-numbered process input descriptor,
3949 so recompute the highest-numbered one now. */
3950 max_process_desc
= 0;
3951 for (i
= 0; i
< MAXDESC
; i
++)
3952 if (!NILP (chan_process
[i
]))
3953 max_process_desc
= i
;
3959 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3961 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3962 It is read into the process' buffers or given to their filter functions.
3963 Non-nil arg PROCESS means do not return until some output has been received
3966 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3967 and milliseconds to wait; return after that much time whether or not
3968 there is any subprocess output. If SECONDS is a floating point number,
3969 it specifies a fractional number of seconds to wait.
3970 The MILLISEC argument is obsolete and should be avoided.
3972 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3973 from PROCESS, suspending reading output from other processes.
3974 If JUST-THIS-ONE is an integer, don't run any timers either.
3975 Return non-nil if we received any output before the timeout expired. */)
3976 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3981 if (! NILP (process
))
3982 CHECK_PROCESS (process
);
3984 just_this_one
= Qnil
;
3986 if (!NILP (millisec
))
3987 { /* Obsolete calling convention using integers rather than floats. */
3988 CHECK_NUMBER (millisec
);
3990 seconds
= make_float (XINT (millisec
) / 1000.0);
3993 CHECK_NUMBER (seconds
);
3994 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4001 if (!NILP (seconds
))
4003 if (INTEGERP (seconds
))
4005 if (0 < XINT (seconds
))
4007 secs
= XINT (seconds
);
4011 else if (FLOATP (seconds
))
4013 if (0 < XFLOAT_DATA (seconds
))
4015 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4016 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
4017 nsecs
= EMACS_NSECS (t
);
4021 wrong_type_argument (Qnumberp
, seconds
);
4023 else if (! NILP (process
))
4027 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4029 !NILP (process
) ? XPROCESS (process
) : NULL
,
4030 NILP (just_this_one
) ? 0 :
4031 !INTEGERP (just_this_one
) ? 1 : -1)
4035 /* Accept a connection for server process SERVER on CHANNEL. */
4037 static int connect_counter
= 0;
4040 server_accept_connection (Lisp_Object server
, int channel
)
4042 Lisp_Object proc
, caller
, name
, buffer
;
4043 Lisp_Object contact
, host
, service
;
4044 struct Lisp_Process
*ps
= XPROCESS (server
);
4045 struct Lisp_Process
*p
;
4049 struct sockaddr_in in
;
4051 struct sockaddr_in6 in6
;
4053 #ifdef HAVE_LOCAL_SOCKETS
4054 struct sockaddr_un un
;
4057 socklen_t len
= sizeof saddr
;
4059 s
= accept (channel
, &saddr
.sa
, &len
);
4068 if (code
== EWOULDBLOCK
)
4072 if (!NILP (ps
->log
))
4073 call3 (ps
->log
, server
, Qnil
,
4074 concat3 (build_string ("accept failed with code"),
4075 Fnumber_to_string (make_number (code
)),
4076 build_string ("\n")));
4082 /* Setup a new process to handle the connection. */
4084 /* Generate a unique identification of the caller, and build contact
4085 information for this process. */
4088 switch (saddr
.sa
.sa_family
)
4092 Lisp_Object args
[5];
4093 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4094 args
[0] = build_string ("%d.%d.%d.%d");
4095 args
[1] = make_number (*ip
++);
4096 args
[2] = make_number (*ip
++);
4097 args
[3] = make_number (*ip
++);
4098 args
[4] = make_number (*ip
++);
4099 host
= Fformat (5, args
);
4100 service
= make_number (ntohs (saddr
.in
.sin_port
));
4102 args
[0] = build_string (" <%s:%d>");
4105 caller
= Fformat (3, args
);
4112 Lisp_Object args
[9];
4113 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4115 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4116 for (i
= 0; i
< 8; i
++)
4117 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4118 host
= Fformat (9, args
);
4119 service
= make_number (ntohs (saddr
.in
.sin_port
));
4121 args
[0] = build_string (" <[%s]:%d>");
4124 caller
= Fformat (3, args
);
4129 #ifdef HAVE_LOCAL_SOCKETS
4133 caller
= Fnumber_to_string (make_number (connect_counter
));
4134 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4138 /* Create a new buffer name for this process if it doesn't have a
4139 filter. The new buffer name is based on the buffer name or
4140 process name of the server process concatenated with the caller
4143 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4147 buffer
= ps
->buffer
;
4149 buffer
= Fbuffer_name (buffer
);
4154 buffer
= concat2 (buffer
, caller
);
4155 buffer
= Fget_buffer_create (buffer
);
4159 /* Generate a unique name for the new server process. Combine the
4160 server process name with the caller identification. */
4162 name
= concat2 (ps
->name
, caller
);
4163 proc
= make_process (name
);
4165 chan_process
[s
] = proc
;
4168 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4171 fcntl (s
, F_SETFL
, O_NDELAY
);
4175 p
= XPROCESS (proc
);
4177 /* Build new contact information for this setup. */
4178 contact
= Fcopy_sequence (ps
->childp
);
4179 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4180 contact
= Fplist_put (contact
, QChost
, host
);
4181 if (!NILP (service
))
4182 contact
= Fplist_put (contact
, QCservice
, service
);
4183 contact
= Fplist_put (contact
, QCremote
,
4184 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4185 #ifdef HAVE_GETSOCKNAME
4187 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4188 contact
= Fplist_put (contact
, QClocal
,
4189 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4192 pset_childp (p
, contact
);
4193 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4194 pset_type (p
, Qnetwork
);
4196 pset_buffer (p
, buffer
);
4197 pset_sentinel (p
, ps
->sentinel
);
4198 pset_filter (p
, ps
->filter
);
4199 pset_command (p
, Qnil
);
4203 pset_status (p
, Qrun
);
4205 /* Client processes for accepted connections are not stopped initially. */
4206 if (!EQ (p
->filter
, Qt
))
4208 FD_SET (s
, &input_wait_mask
);
4209 FD_SET (s
, &non_keyboard_wait_mask
);
4212 if (s
> max_process_desc
)
4213 max_process_desc
= s
;
4215 /* Setup coding system for new process based on server process.
4216 This seems to be the proper thing to do, as the coding system
4217 of the new process should reflect the settings at the time the
4218 server socket was opened; not the current settings. */
4220 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4221 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4222 setup_process_coding_systems (proc
);
4224 pset_decoding_buf (p
, empty_unibyte_string
);
4225 p
->decoding_carryover
= 0;
4226 pset_encoding_buf (p
, empty_unibyte_string
);
4228 p
->inherit_coding_system_flag
4229 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4231 if (!NILP (ps
->log
))
4232 call3 (ps
->log
, server
, proc
,
4233 concat3 (build_string ("accept from "),
4234 (STRINGP (host
) ? host
: build_string ("-")),
4235 build_string ("\n")));
4237 if (!NILP (p
->sentinel
))
4238 exec_sentinel (proc
,
4239 concat3 (build_string ("open from "),
4240 (STRINGP (host
) ? host
: build_string ("-")),
4241 build_string ("\n")));
4244 /* This variable is different from waiting_for_input in keyboard.c.
4245 It is used to communicate to a lisp process-filter/sentinel (via the
4246 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4247 for user-input when that process-filter was called.
4248 waiting_for_input cannot be used as that is by definition 0 when
4249 lisp code is being evalled.
4250 This is also used in record_asynch_buffer_change.
4251 For that purpose, this must be 0
4252 when not inside wait_reading_process_output. */
4253 static int waiting_for_user_input_p
;
4256 wait_reading_process_output_unwind (Lisp_Object data
)
4258 waiting_for_user_input_p
= XINT (data
);
4262 /* This is here so breakpoints can be put on it. */
4264 wait_reading_process_output_1 (void)
4268 /* Read and dispose of subprocess output while waiting for timeout to
4269 elapse and/or keyboard input to be available.
4273 If negative, gobble data immediately available but don't wait for any.
4276 an additional duration to wait, measured in nanoseconds
4277 If TIME_LIMIT is zero, then:
4278 If NSECS == 0, there is no limit.
4279 If NSECS > 0, the timeout consists of NSECS only.
4280 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4283 0 to ignore keyboard input, or
4284 1 to return when input is available, or
4285 -1 meaning caller will actually read the input, so don't throw to
4286 the quit handler, or
4288 DO_DISPLAY means redisplay should be done to show subprocess
4289 output that arrives.
4291 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4292 (and gobble terminal input into the buffer if any arrives).
4294 If WAIT_PROC is specified, wait until something arrives from that
4295 process. The return value is true if we read some input from
4298 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4299 (suspending output from other processes). A negative value
4300 means don't run any timers either.
4302 If WAIT_PROC is specified, then the function returns true if we
4303 received input from that process before the timeout elapsed.
4304 Otherwise, return true if we received input from any process. */
4307 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4309 Lisp_Object wait_for_cell
,
4310 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4312 register int channel
, nfds
;
4313 SELECT_TYPE Available
;
4314 SELECT_TYPE Writeok
;
4316 int check_delay
, no_avail
;
4319 EMACS_TIME timeout
, end_time
;
4320 int wait_channel
= -1;
4321 int got_some_input
= 0;
4322 ptrdiff_t count
= SPECPDL_INDEX ();
4324 FD_ZERO (&Available
);
4327 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4328 && !(CONSP (wait_proc
->status
)
4329 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4330 message ("Blocking call to accept-process-output with quit inhibited!!");
4332 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4333 if (wait_proc
!= NULL
)
4334 wait_channel
= wait_proc
->infd
;
4336 record_unwind_protect (wait_reading_process_output_unwind
,
4337 make_number (waiting_for_user_input_p
));
4338 waiting_for_user_input_p
= read_kbd
;
4345 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4346 time_limit
= TYPE_MAXIMUM (time_t);
4348 /* Since we may need to wait several times,
4349 compute the absolute time to return at. */
4350 if (time_limit
|| 0 < nsecs
)
4352 timeout
= make_emacs_time (time_limit
, nsecs
);
4353 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4358 int timeout_reduced_for_timers
= 0;
4360 /* If calling from keyboard input, do not quit
4361 since we want to return C-g as an input character.
4362 Otherwise, do pending quit if requested. */
4365 else if (pending_signals
)
4366 process_pending_signals ();
4368 /* Exit now if the cell we're waiting for became non-nil. */
4369 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4372 /* Compute time from now till when time limit is up */
4373 /* Exit if already run out */
4376 /* A negative timeout means
4377 gobble output available now
4378 but don't wait at all. */
4380 timeout
= make_emacs_time (0, 0);
4382 else if (time_limit
|| 0 < nsecs
)
4384 EMACS_TIME now
= current_emacs_time ();
4385 if (EMACS_TIME_LE (end_time
, now
))
4387 timeout
= sub_emacs_time (end_time
, now
);
4391 timeout
= make_emacs_time (100000, 0);
4394 /* Normally we run timers here.
4395 But not if wait_for_cell; in those cases,
4396 the wait is supposed to be short,
4397 and those callers cannot handle running arbitrary Lisp code here. */
4398 if (NILP (wait_for_cell
)
4399 && just_wait_proc
>= 0)
4401 EMACS_TIME timer_delay
;
4405 unsigned old_timers_run
= timers_run
;
4406 struct buffer
*old_buffer
= current_buffer
;
4407 Lisp_Object old_window
= selected_window
;
4409 timer_delay
= timer_check ();
4411 /* If a timer has run, this might have changed buffers
4412 an alike. Make read_key_sequence aware of that. */
4413 if (timers_run
!= old_timers_run
4414 && (old_buffer
!= current_buffer
4415 || !EQ (old_window
, selected_window
))
4416 && waiting_for_user_input_p
== -1)
4417 record_asynch_buffer_change ();
4419 if (timers_run
!= old_timers_run
&& do_display
)
4420 /* We must retry, since a timer may have requeued itself
4421 and that could alter the time_delay. */
4422 redisplay_preserve_echo_area (9);
4426 while (!detect_input_pending ());
4428 /* If there is unread keyboard input, also return. */
4430 && requeued_events_pending_p ())
4433 /* A negative timeout means do not wait at all. */
4436 if (EMACS_TIME_VALID_P (timer_delay
))
4438 if (EMACS_TIME_LT (timer_delay
, timeout
))
4440 timeout
= timer_delay
;
4441 timeout_reduced_for_timers
= 1;
4446 /* This is so a breakpoint can be put here. */
4447 wait_reading_process_output_1 ();
4452 /* Cause C-g and alarm signals to take immediate action,
4453 and cause input available signals to zero out timeout.
4455 It is important that we do this before checking for process
4456 activity. If we get a SIGCHLD after the explicit checks for
4457 process activity, timeout is the only way we will know. */
4459 set_waiting_for_input (&timeout
);
4461 /* If status of something has changed, and no input is
4462 available, notify the user of the change right away. After
4463 this explicit check, we'll let the SIGCHLD handler zap
4464 timeout to get our attention. */
4465 if (update_tick
!= process_tick
)
4470 if (kbd_on_hold_p ())
4473 Atemp
= input_wait_mask
;
4476 timeout
= make_emacs_time (0, 0);
4477 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4479 #ifdef NON_BLOCKING_CONNECT
4480 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4484 NULL
, &timeout
, NULL
)
4487 /* It's okay for us to do this and then continue with
4488 the loop, since timeout has already been zeroed out. */
4489 clear_waiting_for_input ();
4490 status_notify (NULL
);
4491 if (do_display
) redisplay_preserve_echo_area (13);
4495 /* Don't wait for output from a non-running process. Just
4496 read whatever data has already been received. */
4497 if (wait_proc
&& wait_proc
->raw_status_new
)
4498 update_status (wait_proc
);
4500 && ! EQ (wait_proc
->status
, Qrun
)
4501 && ! EQ (wait_proc
->status
, Qconnect
))
4503 int nread
, total_nread
= 0;
4505 clear_waiting_for_input ();
4506 XSETPROCESS (proc
, wait_proc
);
4508 /* Read data from the process, until we exhaust it. */
4509 while (wait_proc
->infd
>= 0)
4511 nread
= read_process_output (proc
, wait_proc
->infd
);
4518 total_nread
+= nread
;
4522 else if (nread
== -1 && EIO
== errno
)
4526 else if (nread
== -1 && EAGAIN
== errno
)
4530 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4534 if (total_nread
> 0 && do_display
)
4535 redisplay_preserve_echo_area (10);
4540 /* Wait till there is something to do */
4542 if (wait_proc
&& just_wait_proc
)
4544 if (wait_proc
->infd
< 0) /* Terminated */
4546 FD_SET (wait_proc
->infd
, &Available
);
4550 else if (!NILP (wait_for_cell
))
4552 Available
= non_process_wait_mask
;
4559 Available
= non_keyboard_wait_mask
;
4561 Available
= input_wait_mask
;
4562 Writeok
= write_mask
;
4563 #ifdef SELECT_CANT_DO_WRITE_MASK
4568 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4571 /* If frame size has changed or the window is newly mapped,
4572 redisplay now, before we start to wait. There is a race
4573 condition here; if a SIGIO arrives between now and the select
4574 and indicates that a frame is trashed, the select may block
4575 displaying a trashed screen. */
4576 if (frame_garbaged
&& do_display
)
4578 clear_waiting_for_input ();
4579 redisplay_preserve_echo_area (11);
4581 set_waiting_for_input (&timeout
);
4584 /* Skip the `select' call if input is available and we're
4585 waiting for keyboard input or a cell change (which can be
4586 triggered by processing X events). In the latter case, set
4587 nfds to 1 to avoid breaking the loop. */
4589 if ((read_kbd
|| !NILP (wait_for_cell
))
4590 && detect_input_pending ())
4592 nfds
= read_kbd
? 0 : 1;
4599 #ifdef ADAPTIVE_READ_BUFFERING
4600 /* Set the timeout for adaptive read buffering if any
4601 process has non-zero read_output_skip and non-zero
4602 read_output_delay, and we are not reading output for a
4603 specific wait_channel. It is not executed if
4604 Vprocess_adaptive_read_buffering is nil. */
4605 if (process_output_skip
&& check_delay
> 0)
4607 int nsecs
= EMACS_NSECS (timeout
);
4608 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4609 nsecs
= READ_OUTPUT_DELAY_MAX
;
4610 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4612 proc
= chan_process
[channel
];
4615 /* Find minimum non-zero read_output_delay among the
4616 processes with non-zero read_output_skip. */
4617 if (XPROCESS (proc
)->read_output_delay
> 0)
4620 if (!XPROCESS (proc
)->read_output_skip
)
4622 FD_CLR (channel
, &Available
);
4623 XPROCESS (proc
)->read_output_skip
= 0;
4624 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4625 nsecs
= XPROCESS (proc
)->read_output_delay
;
4628 timeout
= make_emacs_time (0, nsecs
);
4629 process_output_skip
= 0;
4633 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4635 #elif defined (HAVE_NS)
4640 (max (max_process_desc
, max_input_desc
) + 1,
4642 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4643 NULL
, &timeout
, NULL
);
4646 /* GnuTLS buffers data internally. In lowat mode it leaves
4647 some data in the TCP buffers so that select works, but
4648 with custom pull/push functions we need to check if some
4649 data is available in the buffers manually. */
4654 /* We're not waiting on a specific process, so loop
4655 through all the channels and check for data.
4656 This is a workaround needed for some versions of
4657 the gnutls library -- 2.12.14 has been confirmed
4659 http://comments.gmane.org/gmane.emacs.devel/145074 */
4660 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4661 if (! NILP (chan_process
[channel
]))
4663 struct Lisp_Process
*p
=
4664 XPROCESS (chan_process
[channel
]);
4665 if (p
&& p
->gnutls_p
&& p
->infd
4666 && ((emacs_gnutls_record_check_pending
4671 FD_SET (p
->infd
, &Available
);
4677 /* Check this specific channel. */
4678 if (wait_proc
->gnutls_p
/* Check for valid process. */
4679 /* Do we have pending data? */
4680 && ((emacs_gnutls_record_check_pending
4681 (wait_proc
->gnutls_state
))
4685 /* Set to Available. */
4686 FD_SET (wait_proc
->infd
, &Available
);
4695 /* Make C-g and alarm signals set flags again */
4696 clear_waiting_for_input ();
4698 /* If we woke up due to SIGWINCH, actually change size now. */
4699 do_pending_window_change (0);
4701 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4702 /* We waited the full specified time, so return now. */
4706 if (xerrno
== EINTR
)
4708 else if (xerrno
== EBADF
)
4711 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4712 the child's closure of the pts gives the parent a SIGHUP, and
4713 the ptc file descriptor is automatically closed,
4714 yielding EBADF here or at select() call above.
4715 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4716 in m/ibmrt-aix.h), and here we just ignore the select error.
4717 Cleanup occurs c/o status_notify after SIGCLD. */
4718 no_avail
= 1; /* Cannot depend on values returned */
4724 error ("select error: %s", emacs_strerror (xerrno
));
4729 FD_ZERO (&Available
);
4733 /* Check for keyboard input */
4734 /* If there is any, return immediately
4735 to give it higher priority than subprocesses */
4739 unsigned old_timers_run
= timers_run
;
4740 struct buffer
*old_buffer
= current_buffer
;
4741 Lisp_Object old_window
= selected_window
;
4744 if (detect_input_pending_run_timers (do_display
))
4746 swallow_events (do_display
);
4747 if (detect_input_pending_run_timers (do_display
))
4751 /* If a timer has run, this might have changed buffers
4752 an alike. Make read_key_sequence aware of that. */
4753 if (timers_run
!= old_timers_run
4754 && waiting_for_user_input_p
== -1
4755 && (old_buffer
!= current_buffer
4756 || !EQ (old_window
, selected_window
)))
4757 record_asynch_buffer_change ();
4763 /* If there is unread keyboard input, also return. */
4765 && requeued_events_pending_p ())
4768 /* If we are not checking for keyboard input now,
4769 do process events (but don't run any timers).
4770 This is so that X events will be processed.
4771 Otherwise they may have to wait until polling takes place.
4772 That would causes delays in pasting selections, for example.
4774 (We used to do this only if wait_for_cell.) */
4775 if (read_kbd
== 0 && detect_input_pending ())
4777 swallow_events (do_display
);
4778 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4779 if (detect_input_pending ())
4784 /* Exit now if the cell we're waiting for became non-nil. */
4785 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4789 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4790 go read it. This can happen with X on BSD after logging out.
4791 In that case, there really is no input and no SIGIO,
4792 but select says there is input. */
4794 if (read_kbd
&& interrupt_input
4795 && keyboard_bit_set (&Available
) && ! noninteractive
)
4796 handle_input_available_signal (SIGIO
);
4800 got_some_input
|= nfds
> 0;
4802 /* If checking input just got us a size-change event from X,
4803 obey it now if we should. */
4804 if (read_kbd
|| ! NILP (wait_for_cell
))
4805 do_pending_window_change (0);
4807 /* Check for data from a process. */
4808 if (no_avail
|| nfds
== 0)
4811 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4813 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4815 && ((d
->condition
& FOR_READ
4816 && FD_ISSET (channel
, &Available
))
4817 || (d
->condition
& FOR_WRITE
4818 && FD_ISSET (channel
, &write_mask
))))
4819 d
->func (channel
, d
->data
);
4822 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4824 if (FD_ISSET (channel
, &Available
)
4825 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4826 && !FD_ISSET (channel
, &non_process_wait_mask
))
4830 /* If waiting for this channel, arrange to return as
4831 soon as no more input to be processed. No more
4833 if (wait_channel
== channel
)
4839 proc
= chan_process
[channel
];
4843 /* If this is a server stream socket, accept connection. */
4844 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4846 server_accept_connection (proc
, channel
);
4850 /* Read data from the process, starting with our
4851 buffered-ahead character if we have one. */
4853 nread
= read_process_output (proc
, channel
);
4856 /* Since read_process_output can run a filter,
4857 which can call accept-process-output,
4858 don't try to read from any other processes
4859 before doing the select again. */
4860 FD_ZERO (&Available
);
4863 redisplay_preserve_echo_area (12);
4866 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4869 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4870 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4872 else if (nread
== -1 && errno
== EAGAIN
)
4876 else if (nread
== -1 && errno
== EAGAIN
)
4878 /* Note that we cannot distinguish between no input
4879 available now and a closed pipe.
4880 With luck, a closed pipe will be accompanied by
4881 subprocess termination and SIGCHLD. */
4882 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4884 #endif /* O_NDELAY */
4885 #endif /* O_NONBLOCK */
4887 /* On some OSs with ptys, when the process on one end of
4888 a pty exits, the other end gets an error reading with
4889 errno = EIO instead of getting an EOF (0 bytes read).
4890 Therefore, if we get an error reading and errno =
4891 EIO, just continue, because the child process has
4892 exited and should clean itself up soon (e.g. when we
4895 However, it has been known to happen that the SIGCHLD
4896 got lost. So raise the signal again just in case.
4898 else if (nread
== -1 && errno
== EIO
)
4900 struct Lisp_Process
*p
= XPROCESS (proc
);
4902 /* Clear the descriptor now, so we only raise the
4904 FD_CLR (channel
, &input_wait_mask
);
4905 FD_CLR (channel
, &non_keyboard_wait_mask
);
4909 /* If the EIO occurs on a pty, the SIGCHLD handler's
4910 waitpid call will not find the process object to
4911 delete. Do it here. */
4912 p
->tick
= ++process_tick
;
4913 pset_status (p
, Qfailed
);
4916 handle_child_signal (SIGCHLD
);
4918 #endif /* HAVE_PTYS */
4919 /* If we can detect process termination, don't consider the
4920 process gone just because its pipe is closed. */
4922 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4927 /* Preserve status of processes already terminated. */
4928 XPROCESS (proc
)->tick
= ++process_tick
;
4929 deactivate_process (proc
);
4930 if (XPROCESS (proc
)->raw_status_new
)
4931 update_status (XPROCESS (proc
));
4932 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4933 pset_status (XPROCESS (proc
),
4934 list2 (Qexit
, make_number (256)));
4937 #ifdef NON_BLOCKING_CONNECT
4938 if (FD_ISSET (channel
, &Writeok
)
4939 && FD_ISSET (channel
, &connect_wait_mask
))
4941 struct Lisp_Process
*p
;
4943 FD_CLR (channel
, &connect_wait_mask
);
4944 FD_CLR (channel
, &write_mask
);
4945 if (--num_pending_connects
< 0)
4948 proc
= chan_process
[channel
];
4952 p
= XPROCESS (proc
);
4955 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4956 So only use it on systems where it is known to work. */
4958 socklen_t xlen
= sizeof (xerrno
);
4959 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4964 struct sockaddr pname
;
4965 int pnamelen
= sizeof (pname
);
4967 /* If connection failed, getpeername will fail. */
4969 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4971 /* Obtain connect failure code through error slippage. */
4974 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4981 p
->tick
= ++process_tick
;
4982 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
4983 deactivate_process (proc
);
4987 pset_status (p
, Qrun
);
4988 /* Execute the sentinel here. If we had relied on
4989 status_notify to do it later, it will read input
4990 from the process before calling the sentinel. */
4991 exec_sentinel (proc
, build_string ("open\n"));
4992 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4994 FD_SET (p
->infd
, &input_wait_mask
);
4995 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4999 #endif /* NON_BLOCKING_CONNECT */
5000 } /* end for each file descriptor */
5001 } /* end while exit conditions not met */
5003 unbind_to (count
, Qnil
);
5005 /* If calling from keyboard input, do not quit
5006 since we want to return C-g as an input character.
5007 Otherwise, do pending quit if requested. */
5010 /* Prevent input_pending from remaining set if we quit. */
5011 clear_input_pending ();
5015 return got_some_input
;
5018 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5021 read_process_output_call (Lisp_Object fun_and_args
)
5023 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5027 read_process_output_error_handler (Lisp_Object error_val
)
5029 cmd_error_internal (error_val
, "error in process filter: ");
5031 update_echo_area ();
5032 Fsleep_for (make_number (2), Qnil
);
5036 /* Read pending output from the process channel,
5037 starting with our buffered-ahead character if we have one.
5038 Yield number of decoded characters read.
5040 This function reads at most 4096 characters.
5041 If you want to read all available subprocess output,
5042 you must call it repeatedly until it returns zero.
5044 The characters read are decoded according to PROC's coding-system
5048 read_process_output (Lisp_Object proc
, register int channel
)
5050 register ssize_t nbytes
;
5052 register Lisp_Object outstream
;
5053 register struct Lisp_Process
*p
= XPROCESS (proc
);
5054 register ptrdiff_t opoint
;
5055 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5056 int carryover
= p
->decoding_carryover
;
5058 ptrdiff_t count
= SPECPDL_INDEX ();
5059 Lisp_Object odeactivate
;
5061 chars
= alloca (carryover
+ readmax
);
5063 /* See the comment above. */
5064 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5066 #ifdef DATAGRAM_SOCKETS
5067 /* We have a working select, so proc_buffered_char is always -1. */
5068 if (DATAGRAM_CHAN_P (channel
))
5070 socklen_t len
= datagram_address
[channel
].len
;
5071 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5072 0, datagram_address
[channel
].sa
, &len
);
5077 int buffered
= 0 <= proc_buffered_char
[channel
];
5080 chars
[carryover
] = proc_buffered_char
[channel
];
5081 proc_buffered_char
[channel
] = -1;
5085 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5086 readmax
- buffered
);
5089 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5090 readmax
- buffered
);
5091 #ifdef ADAPTIVE_READ_BUFFERING
5092 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5094 int delay
= p
->read_output_delay
;
5097 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5100 process_output_delay_count
++;
5101 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5104 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5106 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5108 process_output_delay_count
--;
5110 p
->read_output_delay
= delay
;
5113 p
->read_output_skip
= 1;
5114 process_output_skip
= 1;
5119 nbytes
+= buffered
&& nbytes
<= 0;
5122 p
->decoding_carryover
= 0;
5124 /* At this point, NBYTES holds number of bytes just received
5125 (including the one in proc_buffered_char[channel]). */
5128 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5130 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5133 /* Now set NBYTES how many bytes we must decode. */
5134 nbytes
+= carryover
;
5136 odeactivate
= Vdeactivate_mark
;
5137 /* There's no good reason to let process filters change the current
5138 buffer, and many callers of accept-process-output, sit-for, and
5139 friends don't expect current-buffer to be changed from under them. */
5140 record_unwind_current_buffer ();
5142 /* Read and dispose of the process output. */
5143 outstream
= p
->filter
;
5144 if (!NILP (outstream
))
5147 bool outer_running_asynch_code
= running_asynch_code
;
5148 int waiting
= waiting_for_user_input_p
;
5150 /* No need to gcpro these, because all we do with them later
5151 is test them for EQness, and none of them should be a string. */
5153 Lisp_Object obuffer
, okeymap
;
5154 XSETBUFFER (obuffer
, current_buffer
);
5155 okeymap
= BVAR (current_buffer
, keymap
);
5158 /* We inhibit quit here instead of just catching it so that
5159 hitting ^G when a filter happens to be running won't screw
5161 specbind (Qinhibit_quit
, Qt
);
5162 specbind (Qlast_nonmenu_event
, Qt
);
5164 /* In case we get recursively called,
5165 and we already saved the match data nonrecursively,
5166 save the same match data in safely recursive fashion. */
5167 if (outer_running_asynch_code
)
5170 /* Don't clobber the CURRENT match data, either! */
5171 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5172 restore_search_regs ();
5173 record_unwind_save_match_data ();
5174 Fset_match_data (tem
, Qt
);
5177 /* For speed, if a search happens within this code,
5178 save the match data in a special nonrecursive fashion. */
5179 running_asynch_code
= 1;
5181 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5182 text
= coding
->dst_object
;
5183 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5184 /* A new coding system might be found. */
5185 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5187 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5189 /* Don't call setup_coding_system for
5190 proc_decode_coding_system[channel] here. It is done in
5191 detect_coding called via decode_coding above. */
5193 /* If a coding system for encoding is not yet decided, we set
5194 it as the same as coding-system for decoding.
5196 But, before doing that we must check if
5197 proc_encode_coding_system[p->outfd] surely points to a
5198 valid memory because p->outfd will be changed once EOF is
5199 sent to the process. */
5200 if (NILP (p
->encode_coding_system
)
5201 && proc_encode_coding_system
[p
->outfd
])
5203 pset_encode_coding_system
5204 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5205 setup_coding_system (p
->encode_coding_system
,
5206 proc_encode_coding_system
[p
->outfd
]);
5210 if (coding
->carryover_bytes
> 0)
5212 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5213 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5214 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5215 coding
->carryover_bytes
);
5216 p
->decoding_carryover
= coding
->carryover_bytes
;
5218 if (SBYTES (text
) > 0)
5219 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5220 sometimes it's simply wrong to wrap (e.g. when called from
5221 accept-process-output). */
5222 internal_condition_case_1 (read_process_output_call
,
5224 Fcons (proc
, Fcons (text
, Qnil
))),
5225 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5226 read_process_output_error_handler
);
5228 /* If we saved the match data nonrecursively, restore it now. */
5229 restore_search_regs ();
5230 running_asynch_code
= outer_running_asynch_code
;
5232 /* Restore waiting_for_user_input_p as it was
5233 when we were called, in case the filter clobbered it. */
5234 waiting_for_user_input_p
= waiting
;
5236 #if 0 /* Call record_asynch_buffer_change unconditionally,
5237 because we might have changed minor modes or other things
5238 that affect key bindings. */
5239 if (! EQ (Fcurrent_buffer (), obuffer
)
5240 || ! EQ (current_buffer
->keymap
, okeymap
))
5242 /* But do it only if the caller is actually going to read events.
5243 Otherwise there's no need to make him wake up, and it could
5244 cause trouble (for example it would make sit_for return). */
5245 if (waiting_for_user_input_p
== -1)
5246 record_asynch_buffer_change ();
5249 /* If no filter, write into buffer if it isn't dead. */
5250 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5252 Lisp_Object old_read_only
;
5253 ptrdiff_t old_begv
, old_zv
;
5254 ptrdiff_t old_begv_byte
, old_zv_byte
;
5255 ptrdiff_t before
, before_byte
;
5256 ptrdiff_t opoint_byte
;
5260 Fset_buffer (p
->buffer
);
5262 opoint_byte
= PT_BYTE
;
5263 old_read_only
= BVAR (current_buffer
, read_only
);
5266 old_begv_byte
= BEGV_BYTE
;
5267 old_zv_byte
= ZV_BYTE
;
5269 bset_read_only (current_buffer
, Qnil
);
5271 /* Insert new output into buffer
5272 at the current end-of-output marker,
5273 thus preserving logical ordering of input and output. */
5274 if (XMARKER (p
->mark
)->buffer
)
5275 SET_PT_BOTH (clip_to_bounds (BEGV
,
5276 marker_position (p
->mark
), ZV
),
5277 clip_to_bounds (BEGV_BYTE
,
5278 marker_byte_position (p
->mark
),
5281 SET_PT_BOTH (ZV
, ZV_BYTE
);
5283 before_byte
= PT_BYTE
;
5285 /* If the output marker is outside of the visible region, save
5286 the restriction and widen. */
5287 if (! (BEGV
<= PT
&& PT
<= ZV
))
5290 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5291 text
= coding
->dst_object
;
5292 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5293 /* A new coding system might be found. See the comment in the
5294 similar code in the previous `if' block. */
5295 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5297 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5298 if (NILP (p
->encode_coding_system
)
5299 && proc_encode_coding_system
[p
->outfd
])
5301 pset_encode_coding_system
5302 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5303 setup_coding_system (p
->encode_coding_system
,
5304 proc_encode_coding_system
[p
->outfd
]);
5307 if (coding
->carryover_bytes
> 0)
5309 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5310 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5311 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5312 coding
->carryover_bytes
);
5313 p
->decoding_carryover
= coding
->carryover_bytes
;
5315 /* Adjust the multibyteness of TEXT to that of the buffer. */
5316 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5317 != ! STRING_MULTIBYTE (text
))
5318 text
= (STRING_MULTIBYTE (text
)
5319 ? Fstring_as_unibyte (text
)
5320 : Fstring_to_multibyte (text
));
5321 /* Insert before markers in case we are inserting where
5322 the buffer's mark is, and the user's next command is Meta-y. */
5323 insert_from_string_before_markers (text
, 0, 0,
5324 SCHARS (text
), SBYTES (text
), 0);
5326 /* Make sure the process marker's position is valid when the
5327 process buffer is changed in the signal_after_change above.
5328 W3 is known to do that. */
5329 if (BUFFERP (p
->buffer
)
5330 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5331 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5333 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5335 update_mode_lines
++;
5337 /* Make sure opoint and the old restrictions
5338 float ahead of any new text just as point would. */
5339 if (opoint
>= before
)
5341 opoint
+= PT
- before
;
5342 opoint_byte
+= PT_BYTE
- before_byte
;
5344 if (old_begv
> before
)
5346 old_begv
+= PT
- before
;
5347 old_begv_byte
+= PT_BYTE
- before_byte
;
5349 if (old_zv
>= before
)
5351 old_zv
+= PT
- before
;
5352 old_zv_byte
+= PT_BYTE
- before_byte
;
5355 /* If the restriction isn't what it should be, set it. */
5356 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5357 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5360 bset_read_only (current_buffer
, old_read_only
);
5361 SET_PT_BOTH (opoint
, opoint_byte
);
5363 /* Handling the process output should not deactivate the mark. */
5364 Vdeactivate_mark
= odeactivate
;
5366 unbind_to (count
, Qnil
);
5370 /* Sending data to subprocess */
5372 /* In send_process, when a write fails temporarily,
5373 wait_reading_process_output is called. It may execute user code,
5374 e.g. timers, that attempts to write new data to the same process.
5375 We must ensure that data is sent in the right order, and not
5376 interspersed half-completed with other writes (Bug#10815). This is
5377 handled by the write_queue element of struct process. It is a list
5378 with each entry having the form
5380 (string . (offset . length))
5382 where STRING is a lisp string, OFFSET is the offset into the
5383 string's byte sequence from which we should begin to send, and
5384 LENGTH is the number of bytes left to send. */
5386 /* Create a new entry in write_queue.
5387 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5388 BUF is a pointer to the string sequence of the input_obj or a C
5389 string in case of Qt or Qnil. */
5392 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5393 const char *buf
, ptrdiff_t len
, int front
)
5396 Lisp_Object entry
, obj
;
5398 if (STRINGP (input_obj
))
5400 offset
= buf
- SSDATA (input_obj
);
5406 obj
= make_unibyte_string (buf
, len
);
5409 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5412 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5414 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5417 /* Remove the first element in the write_queue of process P, put its
5418 contents in OBJ, BUF and LEN, and return non-zero. If the
5419 write_queue is empty, return zero. */
5422 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5423 const char **buf
, ptrdiff_t *len
)
5425 Lisp_Object entry
, offset_length
;
5428 if (NILP (p
->write_queue
))
5431 entry
= XCAR (p
->write_queue
);
5432 pset_write_queue (p
, XCDR (p
->write_queue
));
5434 *obj
= XCAR (entry
);
5435 offset_length
= XCDR (entry
);
5437 *len
= XINT (XCDR (offset_length
));
5438 offset
= XINT (XCAR (offset_length
));
5439 *buf
= SSDATA (*obj
) + offset
;
5444 /* Send some data to process PROC.
5445 BUF is the beginning of the data; LEN is the number of characters.
5446 OBJECT is the Lisp object that the data comes from. If OBJECT is
5447 nil or t, it means that the data comes from C string.
5449 If OBJECT is not nil, the data is encoded by PROC's coding-system
5450 for encoding before it is sent.
5452 This function can evaluate Lisp code and can garbage collect. */
5455 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5458 struct Lisp_Process
*p
= XPROCESS (proc
);
5460 struct coding_system
*coding
;
5462 if (p
->raw_status_new
)
5464 if (! EQ (p
->status
, Qrun
))
5465 error ("Process %s not running", SDATA (p
->name
));
5467 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5469 coding
= proc_encode_coding_system
[p
->outfd
];
5470 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5472 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5473 || (BUFFERP (object
)
5474 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5477 pset_encode_coding_system
5478 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5479 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5481 /* The coding system for encoding was changed to raw-text
5482 because we sent a unibyte text previously. Now we are
5483 sending a multibyte text, thus we must encode it by the
5484 original coding system specified for the current process.
5486 Another reason we come here is that the coding system
5487 was just complemented and a new one was returned by
5488 complement_process_encoding_system. */
5489 setup_coding_system (p
->encode_coding_system
, coding
);
5490 Vlast_coding_system_used
= p
->encode_coding_system
;
5492 coding
->src_multibyte
= 1;
5496 coding
->src_multibyte
= 0;
5497 /* For sending a unibyte text, character code conversion should
5498 not take place but EOL conversion should. So, setup raw-text
5499 or one of the subsidiary if we have not yet done it. */
5500 if (CODING_REQUIRE_ENCODING (coding
))
5502 if (CODING_REQUIRE_FLUSHING (coding
))
5504 /* But, before changing the coding, we must flush out data. */
5505 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5506 send_process (proc
, "", 0, Qt
);
5507 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5509 setup_coding_system (raw_text_coding_system
5510 (Vlast_coding_system_used
),
5512 coding
->src_multibyte
= 0;
5515 coding
->dst_multibyte
= 0;
5517 if (CODING_REQUIRE_ENCODING (coding
))
5519 coding
->dst_object
= Qt
;
5520 if (BUFFERP (object
))
5522 ptrdiff_t from_byte
, from
, to
;
5523 ptrdiff_t save_pt
, save_pt_byte
;
5524 struct buffer
*cur
= current_buffer
;
5526 set_buffer_internal (XBUFFER (object
));
5527 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5529 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5530 from
= BYTE_TO_CHAR (from_byte
);
5531 to
= BYTE_TO_CHAR (from_byte
+ len
);
5532 TEMP_SET_PT_BOTH (from
, from_byte
);
5533 encode_coding_object (coding
, object
, from
, from_byte
,
5534 to
, from_byte
+ len
, Qt
);
5535 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5536 set_buffer_internal (cur
);
5538 else if (STRINGP (object
))
5540 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5541 SBYTES (object
), Qt
);
5545 coding
->dst_object
= make_unibyte_string (buf
, len
);
5546 coding
->produced
= len
;
5549 len
= coding
->produced
;
5550 object
= coding
->dst_object
;
5551 buf
= SSDATA (object
);
5554 if (pty_max_bytes
== 0)
5556 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5557 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5558 if (pty_max_bytes
< 0)
5559 pty_max_bytes
= 250;
5561 pty_max_bytes
= 250;
5563 /* Deduct one, to leave space for the eof. */
5567 /* If there is already data in the write_queue, put the new data
5568 in the back of queue. Otherwise, ignore it. */
5569 if (!NILP (p
->write_queue
))
5570 write_queue_push (p
, object
, buf
, len
, 0);
5572 do /* while !NILP (p->write_queue) */
5574 ptrdiff_t cur_len
= -1;
5575 const char *cur_buf
;
5576 Lisp_Object cur_object
;
5578 /* If write_queue is empty, ignore it. */
5579 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5583 cur_object
= object
;
5588 /* Send this batch, using one or more write calls. */
5589 ptrdiff_t written
= 0;
5590 int outfd
= p
->outfd
;
5591 #ifdef DATAGRAM_SOCKETS
5592 if (DATAGRAM_CHAN_P (outfd
))
5594 rv
= sendto (outfd
, cur_buf
, cur_len
,
5595 0, datagram_address
[outfd
].sa
,
5596 datagram_address
[outfd
].len
);
5599 else if (errno
== EMSGSIZE
)
5600 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5607 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5610 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5611 rv
= (written
? 0 : -1);
5612 #ifdef ADAPTIVE_READ_BUFFERING
5613 if (p
->read_output_delay
> 0
5614 && p
->adaptive_read_buffering
== 1)
5616 p
->read_output_delay
= 0;
5617 process_output_delay_count
--;
5618 p
->read_output_skip
= 0;
5627 || errno
== EWOULDBLOCK
5633 /* Buffer is full. Wait, accepting input;
5634 that may allow the program
5635 to finish doing output and read more. */
5637 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5638 /* A gross hack to work around a bug in FreeBSD.
5639 In the following sequence, read(2) returns
5643 write(2) 954 bytes, get EAGAIN
5644 read(2) 1024 bytes in process_read_output
5645 read(2) 11 bytes in process_read_output
5647 That is, read(2) returns more bytes than have
5648 ever been written successfully. The 1033 bytes
5649 read are the 1022 bytes written successfully
5650 after processing (for example with CRs added if
5651 the terminal is set up that way which it is
5652 here). The same bytes will be seen again in a
5653 later read(2), without the CRs. */
5655 if (errno
== EAGAIN
)
5658 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5660 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5662 /* Put what we should have written in wait_queue. */
5663 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5664 wait_reading_process_output (0, 20 * 1000 * 1000,
5665 0, 0, Qnil
, NULL
, 0);
5666 /* Reread queue, to see what is left. */
5669 else if (errno
== EPIPE
)
5671 p
->raw_status_new
= 0;
5672 pset_status (p
, list2 (Qexit
, make_number (256)));
5673 p
->tick
= ++process_tick
;
5674 deactivate_process (proc
);
5675 error ("process %s no longer connected to pipe; closed it",
5679 /* This is a real error. */
5680 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5686 while (!NILP (p
->write_queue
));
5689 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5691 doc
: /* Send current contents of region as input to PROCESS.
5692 PROCESS may be a process, a buffer, the name of a process or buffer, or
5693 nil, indicating the current buffer's process.
5694 Called from program, takes three arguments, PROCESS, START and END.
5695 If the region is more than 500 characters long,
5696 it is sent in several bunches. This may happen even for shorter regions.
5697 Output from processes can arrive in between bunches. */)
5698 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5701 ptrdiff_t start1
, end1
;
5703 proc
= get_process (process
);
5704 validate_region (&start
, &end
);
5706 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5707 move_gap (XINT (start
));
5709 start1
= CHAR_TO_BYTE (XINT (start
));
5710 end1
= CHAR_TO_BYTE (XINT (end
));
5711 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5712 Fcurrent_buffer ());
5717 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5719 doc
: /* Send PROCESS the contents of STRING as input.
5720 PROCESS may be a process, a buffer, the name of a process or buffer, or
5721 nil, indicating the current buffer's process.
5722 If STRING is more than 500 characters long,
5723 it is sent in several bunches. This may happen even for shorter strings.
5724 Output from processes can arrive in between bunches. */)
5725 (Lisp_Object process
, Lisp_Object string
)
5728 CHECK_STRING (string
);
5729 proc
= get_process (process
);
5730 send_process (proc
, SSDATA (string
),
5731 SBYTES (string
), string
);
5735 /* Return the foreground process group for the tty/pty that
5736 the process P uses. */
5738 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5743 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5746 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5747 master side. Try the slave side. */
5748 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5752 ioctl (fd
, TIOCGPGRP
, &gid
);
5756 #endif /* defined (TIOCGPGRP ) */
5761 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5762 Sprocess_running_child_p
, 0, 1, 0,
5763 doc
: /* Return t if PROCESS has given the terminal to a child.
5764 If the operating system does not make it possible to find out,
5765 return t unconditionally. */)
5766 (Lisp_Object process
)
5768 /* Initialize in case ioctl doesn't exist or gives an error,
5769 in a way that will cause returning t. */
5772 struct Lisp_Process
*p
;
5774 proc
= get_process (process
);
5775 p
= XPROCESS (proc
);
5777 if (!EQ (p
->type
, Qreal
))
5778 error ("Process %s is not a subprocess",
5781 error ("Process %s is not active",
5784 gid
= emacs_get_tty_pgrp (p
);
5791 /* send a signal number SIGNO to PROCESS.
5792 If CURRENT_GROUP is t, that means send to the process group
5793 that currently owns the terminal being used to communicate with PROCESS.
5794 This is used for various commands in shell mode.
5795 If CURRENT_GROUP is lambda, that means send to the process group
5796 that currently owns the terminal, but only if it is NOT the shell itself.
5798 If NOMSG is zero, insert signal-announcements into process's buffers
5801 If we can, we try to signal PROCESS by sending control characters
5802 down the pty. This allows us to signal inferiors who have changed
5803 their uid, for which killpg would return an EPERM error. */
5806 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5810 register struct Lisp_Process
*p
;
5814 proc
= get_process (process
);
5815 p
= XPROCESS (proc
);
5817 if (!EQ (p
->type
, Qreal
))
5818 error ("Process %s is not a subprocess",
5821 error ("Process %s is not active",
5825 current_group
= Qnil
;
5827 /* If we are using pgrps, get a pgrp number and make it negative. */
5828 if (NILP (current_group
))
5829 /* Send the signal to the shell's process group. */
5833 #ifdef SIGNALS_VIA_CHARACTERS
5834 /* If possible, send signals to the entire pgrp
5835 by sending an input character to it. */
5838 cc_t
*sig_char
= NULL
;
5840 tcgetattr (p
->infd
, &t
);
5845 sig_char
= &t
.c_cc
[VINTR
];
5849 sig_char
= &t
.c_cc
[VQUIT
];
5853 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5854 sig_char
= &t
.c_cc
[VSWTCH
];
5856 sig_char
= &t
.c_cc
[VSUSP
];
5861 if (sig_char
&& *sig_char
!= CDISABLE
)
5863 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5866 /* If we can't send the signal with a character,
5867 fall through and send it another way. */
5869 /* The code above may fall through if it can't
5870 handle the signal. */
5871 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5874 /* Get the current pgrp using the tty itself, if we have that.
5875 Otherwise, use the pty to get the pgrp.
5876 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5877 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5878 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5879 His patch indicates that if TIOCGPGRP returns an error, then
5880 we should just assume that p->pid is also the process group id. */
5882 gid
= emacs_get_tty_pgrp (p
);
5885 /* If we can't get the information, assume
5886 the shell owns the tty. */
5889 /* It is not clear whether anything really can set GID to -1.
5890 Perhaps on some system one of those ioctls can or could do so.
5891 Or perhaps this is vestigial. */
5894 #else /* ! defined (TIOCGPGRP ) */
5895 /* Can't select pgrps on this system, so we know that
5896 the child itself heads the pgrp. */
5898 #endif /* ! defined (TIOCGPGRP ) */
5900 /* If current_group is lambda, and the shell owns the terminal,
5901 don't send any signal. */
5902 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5910 p
->raw_status_new
= 0;
5911 pset_status (p
, Qrun
);
5912 p
->tick
= ++process_tick
;
5915 status_notify (NULL
);
5916 redisplay_preserve_echo_area (13);
5919 #endif /* ! defined (SIGCONT) */
5923 flush_pending_output (p
->infd
);
5927 /* If we don't have process groups, send the signal to the immediate
5928 subprocess. That isn't really right, but it's better than any
5929 obvious alternative. */
5932 kill (p
->pid
, signo
);
5936 /* gid may be a pid, or minus a pgrp's number */
5938 if (!NILP (current_group
))
5940 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5941 EMACS_KILLPG (gid
, signo
);
5948 #else /* ! defined (TIOCSIGSEND) */
5949 EMACS_KILLPG (gid
, signo
);
5950 #endif /* ! defined (TIOCSIGSEND) */
5953 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5954 doc
: /* Interrupt process PROCESS.
5955 PROCESS may be a process, a buffer, or the name of a process or buffer.
5956 No arg or nil means current buffer's process.
5957 Second arg CURRENT-GROUP non-nil means send signal to
5958 the current process-group of the process's controlling terminal
5959 rather than to the process's own process group.
5960 If the process is a shell, this means interrupt current subjob
5961 rather than the shell.
5963 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5964 don't send the signal. */)
5965 (Lisp_Object process
, Lisp_Object current_group
)
5967 process_send_signal (process
, SIGINT
, current_group
, 0);
5971 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5972 doc
: /* Kill process PROCESS. May be process or name of one.
5973 See function `interrupt-process' for more details on usage. */)
5974 (Lisp_Object process
, Lisp_Object current_group
)
5976 process_send_signal (process
, SIGKILL
, current_group
, 0);
5980 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5981 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5982 See function `interrupt-process' for more details on usage. */)
5983 (Lisp_Object process
, Lisp_Object current_group
)
5985 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5989 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5990 doc
: /* Stop process PROCESS. May be process or name of one.
5991 See function `interrupt-process' for more details on usage.
5992 If PROCESS is a network or serial process, inhibit handling of incoming
5994 (Lisp_Object process
, Lisp_Object current_group
)
5996 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5998 struct Lisp_Process
*p
;
6000 p
= XPROCESS (process
);
6001 if (NILP (p
->command
)
6004 FD_CLR (p
->infd
, &input_wait_mask
);
6005 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6007 pset_command (p
, Qt
);
6011 error ("No SIGTSTP support");
6013 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6018 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6019 doc
: /* Continue process PROCESS. May be process or name of one.
6020 See function `interrupt-process' for more details on usage.
6021 If PROCESS is a network or serial process, resume handling of incoming
6023 (Lisp_Object process
, Lisp_Object current_group
)
6025 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6027 struct Lisp_Process
*p
;
6029 p
= XPROCESS (process
);
6030 if (EQ (p
->command
, Qt
)
6032 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6034 FD_SET (p
->infd
, &input_wait_mask
);
6035 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6037 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6038 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6039 #else /* not WINDOWSNT */
6040 tcflush (p
->infd
, TCIFLUSH
);
6041 #endif /* not WINDOWSNT */
6043 pset_command (p
, Qnil
);
6047 process_send_signal (process
, SIGCONT
, current_group
, 0);
6049 error ("No SIGCONT support");
6054 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6055 2, 2, "sProcess (name or number): \nnSignal code: ",
6056 doc
: /* Send PROCESS the signal with code SIGCODE.
6057 PROCESS may also be a number specifying the process id of the
6058 process to signal; in this case, the process need not be a child of
6060 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6061 (Lisp_Object process
, Lisp_Object sigcode
)
6065 if (STRINGP (process
))
6067 Lisp_Object tem
= Fget_process (process
);
6070 Lisp_Object process_number
=
6071 string_to_number (SSDATA (process
), 10, 1);
6072 if (INTEGERP (process_number
) || FLOATP (process_number
))
6073 tem
= process_number
;
6077 else if (!NUMBERP (process
))
6078 process
= get_process (process
);
6083 if (NUMBERP (process
))
6084 CONS_TO_INTEGER (process
, pid_t
, pid
);
6087 CHECK_PROCESS (process
);
6088 pid
= XPROCESS (process
)->pid
;
6090 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6093 #define parse_signal(NAME, VALUE) \
6094 else if (!xstrcasecmp (name, NAME)) \
6095 XSETINT (sigcode, VALUE)
6097 if (INTEGERP (sigcode
))
6098 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6103 CHECK_SYMBOL (sigcode
);
6104 name
= SSDATA (SYMBOL_NAME (sigcode
));
6106 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6112 parse_signal ("usr1", SIGUSR1
);
6115 parse_signal ("usr2", SIGUSR2
);
6117 parse_signal ("term", SIGTERM
);
6119 parse_signal ("hup", SIGHUP
);
6121 parse_signal ("int", SIGINT
);
6123 parse_signal ("quit", SIGQUIT
);
6125 parse_signal ("ill", SIGILL
);
6126 parse_signal ("abrt", SIGABRT
);
6128 parse_signal ("emt", SIGEMT
);
6131 parse_signal ("kill", SIGKILL
);
6133 parse_signal ("fpe", SIGFPE
);
6135 parse_signal ("bus", SIGBUS
);
6137 parse_signal ("segv", SIGSEGV
);
6139 parse_signal ("sys", SIGSYS
);
6142 parse_signal ("pipe", SIGPIPE
);
6145 parse_signal ("alrm", SIGALRM
);
6148 parse_signal ("urg", SIGURG
);
6151 parse_signal ("stop", SIGSTOP
);
6154 parse_signal ("tstp", SIGTSTP
);
6157 parse_signal ("cont", SIGCONT
);
6160 parse_signal ("chld", SIGCHLD
);
6163 parse_signal ("ttin", SIGTTIN
);
6166 parse_signal ("ttou", SIGTTOU
);
6169 parse_signal ("io", SIGIO
);
6172 parse_signal ("xcpu", SIGXCPU
);
6175 parse_signal ("xfsz", SIGXFSZ
);
6178 parse_signal ("vtalrm", SIGVTALRM
);
6181 parse_signal ("prof", SIGPROF
);
6184 parse_signal ("winch", SIGWINCH
);
6187 parse_signal ("info", SIGINFO
);
6190 error ("Undefined signal name %s", name
);
6195 return make_number (kill (pid
, XINT (sigcode
)));
6198 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6199 doc
: /* Make PROCESS see end-of-file in its input.
6200 EOF comes after any text already sent to it.
6201 PROCESS may be a process, a buffer, the name of a process or buffer, or
6202 nil, indicating the current buffer's process.
6203 If PROCESS is a network connection, or is a process communicating
6204 through a pipe (as opposed to a pty), then you cannot send any more
6205 text to PROCESS after you call this function.
6206 If PROCESS is a serial process, wait until all output written to the
6207 process has been transmitted to the serial port. */)
6208 (Lisp_Object process
)
6211 struct coding_system
*coding
;
6213 if (DATAGRAM_CONN_P (process
))
6216 proc
= get_process (process
);
6217 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6219 /* Make sure the process is really alive. */
6220 if (XPROCESS (proc
)->raw_status_new
)
6221 update_status (XPROCESS (proc
));
6222 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6223 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6225 if (CODING_REQUIRE_FLUSHING (coding
))
6227 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6228 send_process (proc
, "", 0, Qnil
);
6231 if (XPROCESS (proc
)->pty_flag
)
6232 send_process (proc
, "\004", 1, Qnil
);
6233 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6236 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6237 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6238 #endif /* not WINDOWSNT */
6239 /* Do nothing on Windows because writes are blocking. */
6243 int old_outfd
, new_outfd
;
6245 #ifdef HAVE_SHUTDOWN
6246 /* If this is a network connection, or socketpair is used
6247 for communication with the subprocess, call shutdown to cause EOF.
6248 (In some old system, shutdown to socketpair doesn't work.
6249 Then we just can't win.) */
6250 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6251 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6252 shutdown (XPROCESS (proc
)->outfd
, 1);
6253 /* In case of socketpair, outfd == infd, so don't close it. */
6254 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6255 emacs_close (XPROCESS (proc
)->outfd
);
6256 #else /* not HAVE_SHUTDOWN */
6257 emacs_close (XPROCESS (proc
)->outfd
);
6258 #endif /* not HAVE_SHUTDOWN */
6259 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6262 old_outfd
= XPROCESS (proc
)->outfd
;
6264 if (!proc_encode_coding_system
[new_outfd
])
6265 proc_encode_coding_system
[new_outfd
]
6266 = xmalloc (sizeof (struct coding_system
));
6267 *proc_encode_coding_system
[new_outfd
]
6268 = *proc_encode_coding_system
[old_outfd
];
6269 memset (proc_encode_coding_system
[old_outfd
], 0,
6270 sizeof (struct coding_system
));
6272 XPROCESS (proc
)->outfd
= new_outfd
;
6277 /* On receipt of a signal that a child status has changed, loop asking
6278 about children with changed statuses until the system says there
6281 All we do is change the status; we do not run sentinels or print
6282 notifications. That is saved for the next time keyboard input is
6283 done, in order to avoid timing errors.
6285 ** WARNING: this can be called during garbage collection.
6286 Therefore, it must not be fooled by the presence of mark bits in
6289 ** USG WARNING: Although it is not obvious from the documentation
6290 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6291 signal() before executing at least one wait(), otherwise the
6292 handler will be called again, resulting in an infinite loop. The
6293 relevant portion of the documentation reads "SIGCLD signals will be
6294 queued and the signal-catching function will be continually
6295 reentered until the queue is empty". Invoking signal() causes the
6296 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6299 ** Malloc WARNING: This should never call malloc either directly or
6300 indirectly; if it does, that is a bug */
6302 /* Record the changed status of the child process PID with wait status W. */
6304 record_child_status_change (pid_t pid
, int w
)
6308 struct Lisp_Process
*p
;
6311 /* Find the process that signaled us, and record its status. */
6313 /* The process can have been deleted by Fdelete_process. */
6314 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6316 Lisp_Object xpid
= XCAR (tail
);
6317 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6318 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6320 XSETCAR (tail
, Qnil
);
6325 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6327 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6329 proc
= XCDR (XCAR (tail
));
6330 p
= XPROCESS (proc
);
6331 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6336 /* Look for an asynchronous process whose pid hasn't been filled
6339 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6341 proc
= XCDR (XCAR (tail
));
6342 p
= XPROCESS (proc
);
6348 /* Change the status of the process that was found. */
6351 int clear_desc_flag
= 0;
6353 p
->tick
= ++process_tick
;
6355 p
->raw_status_new
= 1;
6357 /* If process has terminated, stop waiting for its output. */
6358 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6360 clear_desc_flag
= 1;
6362 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6363 if (clear_desc_flag
)
6365 FD_CLR (p
->infd
, &input_wait_mask
);
6366 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6369 /* Tell wait_reading_process_output that it needs to wake up and
6371 if (input_available_clear_time
)
6372 *input_available_clear_time
= make_emacs_time (0, 0);
6374 /* There was no asynchronous process found for that pid: we have
6375 a synchronous process. */
6378 synch_process_alive
= 0;
6380 /* Report the status of the synchronous process. */
6382 synch_process_retcode
= WEXITSTATUS (w
);
6383 else if (WIFSIGNALED (w
))
6384 synch_process_termsig
= WTERMSIG (w
);
6386 /* Tell wait_reading_process_output that it needs to wake up and
6388 if (input_available_clear_time
)
6389 *input_available_clear_time
= make_emacs_time (0, 0);
6396 /* On some systems, the SIGCHLD handler must return right away. If
6397 any more processes want to signal us, we will get another signal.
6398 Otherwise, loop around to use up all the processes that have
6399 something to tell us. */
6400 #if (defined WINDOWSNT \
6401 || (defined USG && !defined GNU_LINUX \
6402 && !(defined HPUX && defined WNOHANG)))
6403 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 0 };
6405 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 1 };
6409 handle_child_signal (int sig
)
6417 pid
= waitpid (-1, &status
, WNOHANG
| WUNTRACED
);
6418 while (pid
< 0 && errno
== EINTR
);
6420 /* PID == 0 means no processes found, PID == -1 means a real failure.
6421 Either way, we have done all our job. */
6425 record_child_status_change (pid
, status
);
6427 while (CAN_HANDLE_MULTIPLE_CHILDREN
);
6431 deliver_child_signal (int sig
)
6433 deliver_process_signal (sig
, handle_child_signal
);
6436 #endif /* SIGCHLD */
6440 exec_sentinel_unwind (Lisp_Object data
)
6442 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6447 exec_sentinel_error_handler (Lisp_Object error_val
)
6449 cmd_error_internal (error_val
, "error in process sentinel: ");
6451 update_echo_area ();
6452 Fsleep_for (make_number (2), Qnil
);
6457 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6459 Lisp_Object sentinel
, odeactivate
;
6460 struct Lisp_Process
*p
= XPROCESS (proc
);
6461 ptrdiff_t count
= SPECPDL_INDEX ();
6462 bool outer_running_asynch_code
= running_asynch_code
;
6463 int waiting
= waiting_for_user_input_p
;
6465 if (inhibit_sentinels
)
6468 /* No need to gcpro these, because all we do with them later
6469 is test them for EQness, and none of them should be a string. */
6470 odeactivate
= Vdeactivate_mark
;
6472 Lisp_Object obuffer
, okeymap
;
6473 XSETBUFFER (obuffer
, current_buffer
);
6474 okeymap
= BVAR (current_buffer
, keymap
);
6477 /* There's no good reason to let sentinels change the current
6478 buffer, and many callers of accept-process-output, sit-for, and
6479 friends don't expect current-buffer to be changed from under them. */
6480 record_unwind_current_buffer ();
6482 sentinel
= p
->sentinel
;
6483 if (NILP (sentinel
))
6486 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6487 assure that it gets restored no matter how the sentinel exits. */
6488 pset_sentinel (p
, Qnil
);
6489 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6490 /* Inhibit quit so that random quits don't screw up a running filter. */
6491 specbind (Qinhibit_quit
, Qt
);
6492 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6494 /* In case we get recursively called,
6495 and we already saved the match data nonrecursively,
6496 save the same match data in safely recursive fashion. */
6497 if (outer_running_asynch_code
)
6500 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6501 restore_search_regs ();
6502 record_unwind_save_match_data ();
6503 Fset_match_data (tem
, Qt
);
6506 /* For speed, if a search happens within this code,
6507 save the match data in a special nonrecursive fashion. */
6508 running_asynch_code
= 1;
6510 internal_condition_case_1 (read_process_output_call
,
6512 Fcons (proc
, Fcons (reason
, Qnil
))),
6513 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6514 exec_sentinel_error_handler
);
6516 /* If we saved the match data nonrecursively, restore it now. */
6517 restore_search_regs ();
6518 running_asynch_code
= outer_running_asynch_code
;
6520 Vdeactivate_mark
= odeactivate
;
6522 /* Restore waiting_for_user_input_p as it was
6523 when we were called, in case the filter clobbered it. */
6524 waiting_for_user_input_p
= waiting
;
6527 if (! EQ (Fcurrent_buffer (), obuffer
)
6528 || ! EQ (current_buffer
->keymap
, okeymap
))
6530 /* But do it only if the caller is actually going to read events.
6531 Otherwise there's no need to make him wake up, and it could
6532 cause trouble (for example it would make sit_for return). */
6533 if (waiting_for_user_input_p
== -1)
6534 record_asynch_buffer_change ();
6536 unbind_to (count
, Qnil
);
6539 /* Report all recent events of a change in process status
6540 (either run the sentinel or output a message).
6541 This is usually done while Emacs is waiting for keyboard input
6542 but can be done at other times. */
6545 status_notify (struct Lisp_Process
*deleting_process
)
6547 register Lisp_Object proc
, buffer
;
6548 Lisp_Object tail
, msg
;
6549 struct gcpro gcpro1
, gcpro2
;
6553 /* We need to gcpro tail; if read_process_output calls a filter
6554 which deletes a process and removes the cons to which tail points
6555 from Vprocess_alist, and then causes a GC, tail is an unprotected
6559 /* Set this now, so that if new processes are created by sentinels
6560 that we run, we get called again to handle their status changes. */
6561 update_tick
= process_tick
;
6563 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6566 register struct Lisp_Process
*p
;
6568 proc
= Fcdr (XCAR (tail
));
6569 p
= XPROCESS (proc
);
6571 if (p
->tick
!= p
->update_tick
)
6573 p
->update_tick
= p
->tick
;
6575 /* If process is still active, read any output that remains. */
6576 while (! EQ (p
->filter
, Qt
)
6577 && ! EQ (p
->status
, Qconnect
)
6578 && ! EQ (p
->status
, Qlisten
)
6579 /* Network or serial process not stopped: */
6580 && ! EQ (p
->command
, Qt
)
6582 && p
!= deleting_process
6583 && read_process_output (proc
, p
->infd
) > 0);
6587 /* Get the text to use for the message. */
6588 if (p
->raw_status_new
)
6590 msg
= status_message (p
);
6592 /* If process is terminated, deactivate it or delete it. */
6594 if (CONSP (p
->status
))
6595 symbol
= XCAR (p
->status
);
6597 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6598 || EQ (symbol
, Qclosed
))
6600 if (delete_exited_processes
)
6601 remove_process (proc
);
6603 deactivate_process (proc
);
6606 /* The actions above may have further incremented p->tick.
6607 So set p->update_tick again
6608 so that an error in the sentinel will not cause
6609 this code to be run again. */
6610 p
->update_tick
= p
->tick
;
6611 /* Now output the message suitably. */
6612 if (!NILP (p
->sentinel
))
6613 exec_sentinel (proc
, msg
);
6614 /* Don't bother with a message in the buffer
6615 when a process becomes runnable. */
6616 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6619 struct buffer
*old
= current_buffer
;
6620 ptrdiff_t opoint
, opoint_byte
;
6621 ptrdiff_t before
, before_byte
;
6623 /* Avoid error if buffer is deleted
6624 (probably that's why the process is dead, too) */
6625 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6627 Fset_buffer (buffer
);
6630 opoint_byte
= PT_BYTE
;
6631 /* Insert new output into buffer
6632 at the current end-of-output marker,
6633 thus preserving logical ordering of input and output. */
6634 if (XMARKER (p
->mark
)->buffer
)
6635 Fgoto_char (p
->mark
);
6637 SET_PT_BOTH (ZV
, ZV_BYTE
);
6640 before_byte
= PT_BYTE
;
6642 tem
= BVAR (current_buffer
, read_only
);
6643 bset_read_only (current_buffer
, Qnil
);
6644 insert_string ("\nProcess ");
6645 { /* FIXME: temporary kludge */
6646 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6647 insert_string (" ");
6649 bset_read_only (current_buffer
, tem
);
6650 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6652 if (opoint
>= before
)
6653 SET_PT_BOTH (opoint
+ (PT
- before
),
6654 opoint_byte
+ (PT_BYTE
- before_byte
));
6656 SET_PT_BOTH (opoint
, opoint_byte
);
6658 set_buffer_internal (old
);
6663 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6668 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6669 Sset_process_coding_system
, 1, 3, 0,
6670 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6671 DECODING will be used to decode subprocess output and ENCODING to
6672 encode subprocess input. */)
6673 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6675 register struct Lisp_Process
*p
;
6677 CHECK_PROCESS (process
);
6678 p
= XPROCESS (process
);
6680 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6682 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6683 Fcheck_coding_system (decoding
);
6684 Fcheck_coding_system (encoding
);
6685 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6686 pset_decode_coding_system (p
, decoding
);
6687 pset_encode_coding_system (p
, encoding
);
6688 setup_process_coding_systems (process
);
6693 DEFUN ("process-coding-system",
6694 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6695 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6696 (register Lisp_Object process
)
6698 CHECK_PROCESS (process
);
6699 return Fcons (XPROCESS (process
)->decode_coding_system
,
6700 XPROCESS (process
)->encode_coding_system
);
6703 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6704 Sset_process_filter_multibyte
, 2, 2, 0,
6705 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6706 If FLAG is non-nil, the filter is given multibyte strings.
6707 If FLAG is nil, the filter is given unibyte strings. In this case,
6708 all character code conversion except for end-of-line conversion is
6710 (Lisp_Object process
, Lisp_Object flag
)
6712 register struct Lisp_Process
*p
;
6714 CHECK_PROCESS (process
);
6715 p
= XPROCESS (process
);
6717 pset_decode_coding_system
6718 (p
, raw_text_coding_system (p
->decode_coding_system
));
6719 setup_process_coding_systems (process
);
6724 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6725 Sprocess_filter_multibyte_p
, 1, 1, 0,
6726 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6727 (Lisp_Object process
)
6729 register struct Lisp_Process
*p
;
6730 struct coding_system
*coding
;
6732 CHECK_PROCESS (process
);
6733 p
= XPROCESS (process
);
6734 coding
= proc_decode_coding_system
[p
->infd
];
6735 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6744 add_gpm_wait_descriptor (int desc
)
6746 add_keyboard_wait_descriptor (desc
);
6750 delete_gpm_wait_descriptor (int desc
)
6752 delete_keyboard_wait_descriptor (desc
);
6757 # ifdef USABLE_SIGIO
6759 /* Return nonzero if *MASK has a bit set
6760 that corresponds to one of the keyboard input descriptors. */
6763 keyboard_bit_set (fd_set
*mask
)
6767 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6768 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6769 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6776 #else /* not subprocesses */
6778 /* Defined on msdos.c. */
6779 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6780 EMACS_TIME
*, void *);
6782 /* Implementation of wait_reading_process_output, assuming that there
6783 are no subprocesses. Used only by the MS-DOS build.
6785 Wait for timeout to elapse and/or keyboard input to be available.
6789 If negative, gobble data immediately available but don't wait for any.
6792 an additional duration to wait, measured in nanoseconds
6793 If TIME_LIMIT is zero, then:
6794 If NSECS == 0, there is no limit.
6795 If NSECS > 0, the timeout consists of NSECS only.
6796 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6799 0 to ignore keyboard input, or
6800 1 to return when input is available, or
6801 -1 means caller will actually read the input, so don't throw to
6804 see full version for other parameters. We know that wait_proc will
6805 always be NULL, since `subprocesses' isn't defined.
6807 DO_DISPLAY means redisplay should be done to show subprocess
6808 output that arrives.
6810 Return true if we received input from any process. */
6813 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6815 Lisp_Object wait_for_cell
,
6816 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6819 EMACS_TIME end_time
, timeout
;
6826 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6827 time_limit
= TYPE_MAXIMUM (time_t);
6829 /* What does time_limit really mean? */
6830 if (time_limit
|| 0 < nsecs
)
6832 timeout
= make_emacs_time (time_limit
, nsecs
);
6833 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6836 /* Turn off periodic alarms (in case they are in use)
6837 and then turn off any other atimers,
6838 because the select emulator uses alarms. */
6840 turn_on_atimers (0);
6844 int timeout_reduced_for_timers
= 0;
6845 SELECT_TYPE waitchannels
;
6848 /* If calling from keyboard input, do not quit
6849 since we want to return C-g as an input character.
6850 Otherwise, do pending quit if requested. */
6854 /* Exit now if the cell we're waiting for became non-nil. */
6855 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6858 /* Compute time from now till when time limit is up */
6859 /* Exit if already run out */
6862 /* A negative timeout means
6863 gobble output available now
6864 but don't wait at all. */
6866 timeout
= make_emacs_time (0, 0);
6868 else if (time_limit
|| 0 < nsecs
)
6870 EMACS_TIME now
= current_emacs_time ();
6871 if (EMACS_TIME_LE (end_time
, now
))
6873 timeout
= sub_emacs_time (end_time
, now
);
6877 timeout
= make_emacs_time (100000, 0);
6880 /* If our caller will not immediately handle keyboard events,
6881 run timer events directly.
6882 (Callers that will immediately read keyboard events
6883 call timer_delay on their own.) */
6884 if (NILP (wait_for_cell
))
6886 EMACS_TIME timer_delay
;
6890 unsigned old_timers_run
= timers_run
;
6891 timer_delay
= timer_check ();
6892 if (timers_run
!= old_timers_run
&& do_display
)
6893 /* We must retry, since a timer may have requeued itself
6894 and that could alter the time delay. */
6895 redisplay_preserve_echo_area (14);
6899 while (!detect_input_pending ());
6901 /* If there is unread keyboard input, also return. */
6903 && requeued_events_pending_p ())
6906 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6908 if (EMACS_TIME_LT (timer_delay
, timeout
))
6910 timeout
= timer_delay
;
6911 timeout_reduced_for_timers
= 1;
6916 /* Cause C-g and alarm signals to take immediate action,
6917 and cause input available signals to zero out timeout. */
6919 set_waiting_for_input (&timeout
);
6921 /* If a frame has been newly mapped and needs updating,
6922 reprocess its display stuff. */
6923 if (frame_garbaged
&& do_display
)
6925 clear_waiting_for_input ();
6926 redisplay_preserve_echo_area (15);
6928 set_waiting_for_input (&timeout
);
6931 /* Wait till there is something to do. */
6932 FD_ZERO (&waitchannels
);
6933 if (read_kbd
&& detect_input_pending ())
6937 if (read_kbd
|| !NILP (wait_for_cell
))
6938 FD_SET (0, &waitchannels
);
6939 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6944 /* Make C-g and alarm signals set flags again */
6945 clear_waiting_for_input ();
6947 /* If we woke up due to SIGWINCH, actually change size now. */
6948 do_pending_window_change (0);
6950 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6951 /* We waited the full specified time, so return now. */
6956 /* If the system call was interrupted, then go around the
6958 if (xerrno
== EINTR
)
6959 FD_ZERO (&waitchannels
);
6961 error ("select error: %s", emacs_strerror (xerrno
));
6964 /* Check for keyboard input */
6967 && detect_input_pending_run_timers (do_display
))
6969 swallow_events (do_display
);
6970 if (detect_input_pending_run_timers (do_display
))
6974 /* If there is unread keyboard input, also return. */
6976 && requeued_events_pending_p ())
6979 /* If wait_for_cell. check for keyboard input
6980 but don't run any timers.
6981 ??? (It seems wrong to me to check for keyboard
6982 input at all when wait_for_cell, but the code
6983 has been this way since July 1994.
6984 Try changing this after version 19.31.) */
6985 if (! NILP (wait_for_cell
)
6986 && detect_input_pending ())
6988 swallow_events (do_display
);
6989 if (detect_input_pending ())
6993 /* Exit now if the cell we're waiting for became non-nil. */
6994 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7003 #endif /* not subprocesses */
7005 /* The following functions are needed even if async subprocesses are
7006 not supported. Some of them are no-op stubs in that case. */
7008 /* Add DESC to the set of keyboard input descriptors. */
7011 add_keyboard_wait_descriptor (int desc
)
7013 #ifdef subprocesses /* actually means "not MSDOS" */
7014 FD_SET (desc
, &input_wait_mask
);
7015 FD_SET (desc
, &non_process_wait_mask
);
7016 if (desc
> max_input_desc
)
7017 max_input_desc
= desc
;
7021 /* From now on, do not expect DESC to give keyboard input. */
7024 delete_keyboard_wait_descriptor (int desc
)
7028 int lim
= max_input_desc
;
7030 FD_CLR (desc
, &input_wait_mask
);
7031 FD_CLR (desc
, &non_process_wait_mask
);
7033 if (desc
== max_input_desc
)
7034 for (fd
= 0; fd
< lim
; fd
++)
7035 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7036 max_input_desc
= fd
;
7040 /* Setup coding systems of PROCESS. */
7043 setup_process_coding_systems (Lisp_Object process
)
7046 struct Lisp_Process
*p
= XPROCESS (process
);
7048 int outch
= p
->outfd
;
7049 Lisp_Object coding_system
;
7051 if (inch
< 0 || outch
< 0)
7054 if (!proc_decode_coding_system
[inch
])
7055 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7056 coding_system
= p
->decode_coding_system
;
7057 if (! NILP (p
->filter
))
7059 else if (BUFFERP (p
->buffer
))
7061 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7062 coding_system
= raw_text_coding_system (coding_system
);
7064 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7066 if (!proc_encode_coding_system
[outch
])
7067 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7068 setup_coding_system (p
->encode_coding_system
,
7069 proc_encode_coding_system
[outch
]);
7073 /* Close all descriptors currently in use for communication
7074 with subprocess. This is used in a newly-forked subprocess
7075 to get rid of irrelevant descriptors. */
7078 close_process_descs (void)
7082 for (i
= 0; i
< MAXDESC
; i
++)
7084 Lisp_Object process
;
7085 process
= chan_process
[i
];
7086 if (!NILP (process
))
7088 int in
= XPROCESS (process
)->infd
;
7089 int out
= XPROCESS (process
)->outfd
;
7092 if (out
>= 0 && in
!= out
)
7099 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7100 doc
: /* Return the (or a) process associated with BUFFER.
7101 BUFFER may be a buffer or the name of one. */)
7102 (register Lisp_Object buffer
)
7105 register Lisp_Object buf
, tail
, proc
;
7107 if (NILP (buffer
)) return Qnil
;
7108 buf
= Fget_buffer (buffer
);
7109 if (NILP (buf
)) return Qnil
;
7111 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7113 proc
= Fcdr (XCAR (tail
));
7114 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7117 #endif /* subprocesses */
7121 DEFUN ("process-inherit-coding-system-flag",
7122 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7124 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7125 If this flag is t, `buffer-file-coding-system' of the buffer
7126 associated with PROCESS will inherit the coding system used to decode
7127 the process output. */)
7128 (register Lisp_Object process
)
7131 CHECK_PROCESS (process
);
7132 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7134 /* Ignore the argument and return the value of
7135 inherit-process-coding-system. */
7136 return inherit_process_coding_system
? Qt
: Qnil
;
7140 /* Kill all processes associated with `buffer'.
7141 If `buffer' is nil, kill all processes */
7144 kill_buffer_processes (Lisp_Object buffer
)
7147 Lisp_Object tail
, proc
;
7149 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7151 proc
= XCDR (XCAR (tail
));
7153 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7155 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7156 Fdelete_process (proc
);
7157 else if (XPROCESS (proc
)->infd
>= 0)
7158 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7161 #else /* subprocesses */
7162 /* Since we have no subprocesses, this does nothing. */
7163 #endif /* subprocesses */
7166 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7167 Swaiting_for_user_input_p
, 0, 0, 0,
7168 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7169 This is intended for use by asynchronous process output filters and sentinels. */)
7173 return (waiting_for_user_input_p
? Qt
: Qnil
);
7179 /* Stop reading input from keyboard sources. */
7182 hold_keyboard_input (void)
7187 /* Resume reading input from keyboard sources. */
7190 unhold_keyboard_input (void)
7195 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7198 kbd_on_hold_p (void)
7200 return kbd_is_on_hold
;
7204 /* Enumeration of and access to system processes a-la ps(1). */
7206 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7208 doc
: /* Return a list of numerical process IDs of all running processes.
7209 If this functionality is unsupported, return nil.
7211 See `process-attributes' for getting attributes of a process given its ID. */)
7214 return list_system_processes ();
7217 DEFUN ("process-attributes", Fprocess_attributes
,
7218 Sprocess_attributes
, 1, 1, 0,
7219 doc
: /* Return attributes of the process given by its PID, a number.
7221 Value is an alist where each element is a cons cell of the form
7225 If this functionality is unsupported, the value is nil.
7227 See `list-system-processes' for getting a list of all process IDs.
7229 The KEYs of the attributes that this function may return are listed
7230 below, together with the type of the associated VALUE (in parentheses).
7231 Not all platforms support all of these attributes; unsupported
7232 attributes will not appear in the returned alist.
7233 Unless explicitly indicated otherwise, numbers can have either
7234 integer or floating point values.
7236 euid -- Effective user User ID of the process (number)
7237 user -- User name corresponding to euid (string)
7238 egid -- Effective user Group ID of the process (number)
7239 group -- Group name corresponding to egid (string)
7240 comm -- Command name (executable name only) (string)
7241 state -- Process state code, such as "S", "R", or "T" (string)
7242 ppid -- Parent process ID (number)
7243 pgrp -- Process group ID (number)
7244 sess -- Session ID, i.e. process ID of session leader (number)
7245 ttname -- Controlling tty name (string)
7246 tpgid -- ID of foreground process group on the process's tty (number)
7247 minflt -- number of minor page faults (number)
7248 majflt -- number of major page faults (number)
7249 cminflt -- cumulative number of minor page faults (number)
7250 cmajflt -- cumulative number of major page faults (number)
7251 utime -- user time used by the process, in (current-time) format,
7252 which is a list of integers (HIGH LOW USEC PSEC)
7253 stime -- system time used by the process (current-time)
7254 time -- sum of utime and stime (current-time)
7255 cutime -- user time used by the process and its children (current-time)
7256 cstime -- system time used by the process and its children (current-time)
7257 ctime -- sum of cutime and cstime (current-time)
7258 pri -- priority of the process (number)
7259 nice -- nice value of the process (number)
7260 thcount -- process thread count (number)
7261 start -- time the process started (current-time)
7262 vsize -- virtual memory size of the process in KB's (number)
7263 rss -- resident set size of the process in KB's (number)
7264 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7265 pcpu -- percents of CPU time used by the process (floating-point number)
7266 pmem -- percents of total physical memory used by process's resident set
7267 (floating-point number)
7268 args -- command line which invoked the process (string). */)
7271 return system_process_attributes (pid
);
7275 /* This is not called "init_process" because that is the name of a
7276 Mach system call, so it would cause problems on Darwin systems. */
7278 init_process_emacs (void)
7283 inhibit_sentinels
= 0;
7287 if (! noninteractive
|| initialized
)
7290 struct sigaction action
;
7291 emacs_sigaction_init (&action
, deliver_child_signal
);
7292 sigaction (SIGCHLD
, &action
, 0);
7296 FD_ZERO (&input_wait_mask
);
7297 FD_ZERO (&non_keyboard_wait_mask
);
7298 FD_ZERO (&non_process_wait_mask
);
7299 FD_ZERO (&write_mask
);
7300 max_process_desc
= 0;
7301 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7303 #ifdef NON_BLOCKING_CONNECT
7304 FD_ZERO (&connect_wait_mask
);
7305 num_pending_connects
= 0;
7308 #ifdef ADAPTIVE_READ_BUFFERING
7309 process_output_delay_count
= 0;
7310 process_output_skip
= 0;
7313 /* Don't do this, it caused infinite select loops. The display
7314 method should call add_keyboard_wait_descriptor on stdin if it
7317 FD_SET (0, &input_wait_mask
);
7320 Vprocess_alist
= Qnil
;
7322 deleted_pid_list
= Qnil
;
7324 for (i
= 0; i
< MAXDESC
; i
++)
7326 chan_process
[i
] = Qnil
;
7327 proc_buffered_char
[i
] = -1;
7329 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7330 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7331 #ifdef DATAGRAM_SOCKETS
7332 memset (datagram_address
, 0, sizeof datagram_address
);
7336 Lisp_Object subfeatures
= Qnil
;
7337 const struct socket_options
*sopt
;
7339 #define ADD_SUBFEATURE(key, val) \
7340 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7342 #ifdef NON_BLOCKING_CONNECT
7343 ADD_SUBFEATURE (QCnowait
, Qt
);
7345 #ifdef DATAGRAM_SOCKETS
7346 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7348 #ifdef HAVE_SEQPACKET
7349 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7351 #ifdef HAVE_LOCAL_SOCKETS
7352 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7354 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7356 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7358 #ifdef HAVE_GETSOCKNAME
7359 ADD_SUBFEATURE (QCservice
, Qt
);
7361 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7362 ADD_SUBFEATURE (QCserver
, Qt
);
7365 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7366 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7368 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7371 #if defined (DARWIN_OS)
7372 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7373 processes. As such, we only change the default value. */
7376 char const *release
= (STRINGP (Voperating_system_release
)
7377 ? SSDATA (Voperating_system_release
)
7379 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7380 Vprocess_connection_type
= Qnil
;
7384 #endif /* subprocesses */
7389 syms_of_process (void)
7393 DEFSYM (Qprocessp
, "processp");
7394 DEFSYM (Qrun
, "run");
7395 DEFSYM (Qstop
, "stop");
7396 DEFSYM (Qsignal
, "signal");
7398 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7401 Qexit = intern_c_string ("exit");
7402 staticpro (&Qexit); */
7404 DEFSYM (Qopen
, "open");
7405 DEFSYM (Qclosed
, "closed");
7406 DEFSYM (Qconnect
, "connect");
7407 DEFSYM (Qfailed
, "failed");
7408 DEFSYM (Qlisten
, "listen");
7409 DEFSYM (Qlocal
, "local");
7410 DEFSYM (Qipv4
, "ipv4");
7412 DEFSYM (Qipv6
, "ipv6");
7414 DEFSYM (Qdatagram
, "datagram");
7415 DEFSYM (Qseqpacket
, "seqpacket");
7417 DEFSYM (QCport
, ":port");
7418 DEFSYM (QCspeed
, ":speed");
7419 DEFSYM (QCprocess
, ":process");
7421 DEFSYM (QCbytesize
, ":bytesize");
7422 DEFSYM (QCstopbits
, ":stopbits");
7423 DEFSYM (QCparity
, ":parity");
7424 DEFSYM (Qodd
, "odd");
7425 DEFSYM (Qeven
, "even");
7426 DEFSYM (QCflowcontrol
, ":flowcontrol");
7429 DEFSYM (QCsummary
, ":summary");
7431 DEFSYM (Qreal
, "real");
7432 DEFSYM (Qnetwork
, "network");
7433 DEFSYM (Qserial
, "serial");
7434 DEFSYM (QCbuffer
, ":buffer");
7435 DEFSYM (QChost
, ":host");
7436 DEFSYM (QCservice
, ":service");
7437 DEFSYM (QClocal
, ":local");
7438 DEFSYM (QCremote
, ":remote");
7439 DEFSYM (QCcoding
, ":coding");
7440 DEFSYM (QCserver
, ":server");
7441 DEFSYM (QCnowait
, ":nowait");
7442 DEFSYM (QCsentinel
, ":sentinel");
7443 DEFSYM (QClog
, ":log");
7444 DEFSYM (QCnoquery
, ":noquery");
7445 DEFSYM (QCstop
, ":stop");
7446 DEFSYM (QCoptions
, ":options");
7447 DEFSYM (QCplist
, ":plist");
7449 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7451 staticpro (&Vprocess_alist
);
7453 staticpro (&deleted_pid_list
);
7456 #endif /* subprocesses */
7458 DEFSYM (QCname
, ":name");
7459 DEFSYM (QCtype
, ":type");
7461 DEFSYM (Qeuid
, "euid");
7462 DEFSYM (Qegid
, "egid");
7463 DEFSYM (Quser
, "user");
7464 DEFSYM (Qgroup
, "group");
7465 DEFSYM (Qcomm
, "comm");
7466 DEFSYM (Qstate
, "state");
7467 DEFSYM (Qppid
, "ppid");
7468 DEFSYM (Qpgrp
, "pgrp");
7469 DEFSYM (Qsess
, "sess");
7470 DEFSYM (Qttname
, "ttname");
7471 DEFSYM (Qtpgid
, "tpgid");
7472 DEFSYM (Qminflt
, "minflt");
7473 DEFSYM (Qmajflt
, "majflt");
7474 DEFSYM (Qcminflt
, "cminflt");
7475 DEFSYM (Qcmajflt
, "cmajflt");
7476 DEFSYM (Qutime
, "utime");
7477 DEFSYM (Qstime
, "stime");
7478 DEFSYM (Qtime
, "time");
7479 DEFSYM (Qcutime
, "cutime");
7480 DEFSYM (Qcstime
, "cstime");
7481 DEFSYM (Qctime
, "ctime");
7482 DEFSYM (Qpri
, "pri");
7483 DEFSYM (Qnice
, "nice");
7484 DEFSYM (Qthcount
, "thcount");
7485 DEFSYM (Qstart
, "start");
7486 DEFSYM (Qvsize
, "vsize");
7487 DEFSYM (Qrss
, "rss");
7488 DEFSYM (Qetime
, "etime");
7489 DEFSYM (Qpcpu
, "pcpu");
7490 DEFSYM (Qpmem
, "pmem");
7491 DEFSYM (Qargs
, "args");
7493 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7494 doc
: /* Non-nil means delete processes immediately when they exit.
7495 A value of nil means don't delete them until `list-processes' is run. */);
7497 delete_exited_processes
= 1;
7500 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7501 doc
: /* Control type of device used to communicate with subprocesses.
7502 Values are nil to use a pipe, or t or `pty' to use a pty.
7503 The value has no effect if the system has no ptys or if all ptys are busy:
7504 then a pipe is used in any case.
7505 The value takes effect when `start-process' is called. */);
7506 Vprocess_connection_type
= Qt
;
7508 #ifdef ADAPTIVE_READ_BUFFERING
7509 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7510 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7511 On some systems, when Emacs reads the output from a subprocess, the output data
7512 is read in very small blocks, potentially resulting in very poor performance.
7513 This behavior can be remedied to some extent by setting this variable to a
7514 non-nil value, as it will automatically delay reading from such processes, to
7515 allow them to produce more output before Emacs tries to read it.
7516 If the value is t, the delay is reset after each write to the process; any other
7517 non-nil value means that the delay is not reset on write.
7518 The variable takes effect when `start-process' is called. */);
7519 Vprocess_adaptive_read_buffering
= Qt
;
7522 defsubr (&Sprocessp
);
7523 defsubr (&Sget_process
);
7524 defsubr (&Sdelete_process
);
7525 defsubr (&Sprocess_status
);
7526 defsubr (&Sprocess_exit_status
);
7527 defsubr (&Sprocess_id
);
7528 defsubr (&Sprocess_name
);
7529 defsubr (&Sprocess_tty_name
);
7530 defsubr (&Sprocess_command
);
7531 defsubr (&Sset_process_buffer
);
7532 defsubr (&Sprocess_buffer
);
7533 defsubr (&Sprocess_mark
);
7534 defsubr (&Sset_process_filter
);
7535 defsubr (&Sprocess_filter
);
7536 defsubr (&Sset_process_sentinel
);
7537 defsubr (&Sprocess_sentinel
);
7538 defsubr (&Sset_process_window_size
);
7539 defsubr (&Sset_process_inherit_coding_system_flag
);
7540 defsubr (&Sset_process_query_on_exit_flag
);
7541 defsubr (&Sprocess_query_on_exit_flag
);
7542 defsubr (&Sprocess_contact
);
7543 defsubr (&Sprocess_plist
);
7544 defsubr (&Sset_process_plist
);
7545 defsubr (&Sprocess_list
);
7546 defsubr (&Sstart_process
);
7547 defsubr (&Sserial_process_configure
);
7548 defsubr (&Smake_serial_process
);
7549 defsubr (&Sset_network_process_option
);
7550 defsubr (&Smake_network_process
);
7551 defsubr (&Sformat_network_address
);
7552 #if defined (HAVE_NET_IF_H)
7554 defsubr (&Snetwork_interface_list
);
7556 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7557 defsubr (&Snetwork_interface_info
);
7559 #endif /* defined (HAVE_NET_IF_H) */
7560 #ifdef DATAGRAM_SOCKETS
7561 defsubr (&Sprocess_datagram_address
);
7562 defsubr (&Sset_process_datagram_address
);
7564 defsubr (&Saccept_process_output
);
7565 defsubr (&Sprocess_send_region
);
7566 defsubr (&Sprocess_send_string
);
7567 defsubr (&Sinterrupt_process
);
7568 defsubr (&Skill_process
);
7569 defsubr (&Squit_process
);
7570 defsubr (&Sstop_process
);
7571 defsubr (&Scontinue_process
);
7572 defsubr (&Sprocess_running_child_p
);
7573 defsubr (&Sprocess_send_eof
);
7574 defsubr (&Ssignal_process
);
7575 defsubr (&Swaiting_for_user_input_p
);
7576 defsubr (&Sprocess_type
);
7577 defsubr (&Sset_process_coding_system
);
7578 defsubr (&Sprocess_coding_system
);
7579 defsubr (&Sset_process_filter_multibyte
);
7580 defsubr (&Sprocess_filter_multibyte_p
);
7582 #endif /* subprocesses */
7584 defsubr (&Sget_buffer_process
);
7585 defsubr (&Sprocess_inherit_coding_system_flag
);
7586 defsubr (&Slist_system_processes
);
7587 defsubr (&Sprocess_attributes
);