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 */
649 { /* Some systems name their pseudoterminals so that there are gaps in
650 the usual sequence - for example, on HP9000/S700 systems, there
651 are no pseudoterminals with names ending in 'f'. So we wait for
652 three failures in a row before deciding that we've reached the
654 int failed_count
= 0;
657 if (stat (pty_name
, &stb
) < 0)
660 if (failed_count
>= 3)
667 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
669 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
672 #endif /* no PTY_OPEN */
676 /* check to make certain that both sides are available
677 this avoids a nasty yet stupid bug in rlogins */
678 #ifdef PTY_TTY_NAME_SPRINTF
681 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
682 #endif /* no PTY_TTY_NAME_SPRINTF */
683 if (access (pty_name
, 6) != 0)
698 #endif /* HAVE_PTYS */
701 make_process (Lisp_Object name
)
703 register Lisp_Object val
, tem
, name1
;
704 register struct Lisp_Process
*p
;
705 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
708 p
= allocate_process ();
709 /* Initialize Lisp data. Note that allocate_process initializes all
710 Lisp data to nil, so do it only for slots which should not be nil. */
711 pset_status (p
, Qrun
);
712 pset_mark (p
, Fmake_marker ());
714 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
715 non-Lisp data, so do it only for slots which should not be zero. */
720 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
723 /* If name is already in use, modify it until it is unused. */
728 tem
= Fget_process (name1
);
729 if (NILP (tem
)) break;
730 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
734 XSETPROCESS (val
, p
);
735 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
740 remove_process (register Lisp_Object proc
)
742 register Lisp_Object pair
;
744 pair
= Frassq (proc
, Vprocess_alist
);
745 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
747 deactivate_process (proc
);
751 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
752 doc
: /* Return t if OBJECT is a process. */)
755 return PROCESSP (object
) ? Qt
: Qnil
;
758 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
759 doc
: /* Return the process named NAME, or nil if there is none. */)
760 (register Lisp_Object name
)
765 return Fcdr (Fassoc (name
, Vprocess_alist
));
768 /* This is how commands for the user decode process arguments. It
769 accepts a process, a process name, a buffer, a buffer name, or nil.
770 Buffers denote the first process in the buffer, and nil denotes the
774 get_process (register Lisp_Object name
)
776 register Lisp_Object proc
, obj
;
779 obj
= Fget_process (name
);
781 obj
= Fget_buffer (name
);
783 error ("Process %s does not exist", SDATA (name
));
785 else if (NILP (name
))
786 obj
= Fcurrent_buffer ();
790 /* Now obj should be either a buffer object or a process object.
794 proc
= Fget_buffer_process (obj
);
796 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
808 /* Fdelete_process promises to immediately forget about the process, but in
809 reality, Emacs needs to remember those processes until they have been
810 treated by the SIGCHLD handler; otherwise this handler would consider the
811 process as being synchronous and say that the synchronous process is
813 static Lisp_Object deleted_pid_list
;
816 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
817 doc
: /* Delete PROCESS: kill it and forget about it immediately.
818 PROCESS may be a process, a buffer, the name of a process or buffer, or
819 nil, indicating the current buffer's process. */)
820 (register Lisp_Object process
)
822 register struct Lisp_Process
*p
;
824 process
= get_process (process
);
825 p
= XPROCESS (process
);
827 p
->raw_status_new
= 0;
828 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
830 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
831 p
->tick
= ++process_tick
;
833 redisplay_preserve_echo_area (13);
835 else if (p
->infd
>= 0)
841 /* No problem storing the pid here, as it is still in Vprocess_alist. */
842 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
843 /* GC treated elements set to nil. */
844 Fdelq (Qnil
, deleted_pid_list
));
845 /* If the process has already signaled, remove it from the list. */
846 if (p
->raw_status_new
)
849 if (CONSP (p
->status
))
850 symbol
= XCAR (p
->status
);
851 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
853 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
857 Fkill_process (process
, Qnil
);
858 /* Do this now, since remove_process will make the
859 SIGCHLD handler do nothing. */
860 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
861 p
->tick
= ++process_tick
;
863 redisplay_preserve_echo_area (13);
866 remove_process (process
);
870 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
871 doc
: /* Return the status of PROCESS.
872 The returned value is one of the following symbols:
873 run -- for a process that is running.
874 stop -- for a process stopped but continuable.
875 exit -- for a process that has exited.
876 signal -- for a process that has got a fatal signal.
877 open -- for a network stream connection that is open.
878 listen -- for a network stream server that is listening.
879 closed -- for a network stream connection that is closed.
880 connect -- when waiting for a non-blocking connection to complete.
881 failed -- when a non-blocking connection has failed.
882 nil -- if arg is a process name and no such process exists.
883 PROCESS may be a process, a buffer, the name of a process, or
884 nil, indicating the current buffer's process. */)
885 (register Lisp_Object process
)
887 register struct Lisp_Process
*p
;
888 register Lisp_Object status
;
890 if (STRINGP (process
))
891 process
= Fget_process (process
);
893 process
= get_process (process
);
898 p
= XPROCESS (process
);
899 if (p
->raw_status_new
)
903 status
= XCAR (status
);
904 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
906 if (EQ (status
, Qexit
))
908 else if (EQ (p
->command
, Qt
))
910 else if (EQ (status
, Qrun
))
916 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
918 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
919 If PROCESS has not yet exited or died, return 0. */)
920 (register Lisp_Object process
)
922 CHECK_PROCESS (process
);
923 if (XPROCESS (process
)->raw_status_new
)
924 update_status (XPROCESS (process
));
925 if (CONSP (XPROCESS (process
)->status
))
926 return XCAR (XCDR (XPROCESS (process
)->status
));
927 return make_number (0);
930 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
931 doc
: /* Return the process id of PROCESS.
932 This is the pid of the external process which PROCESS uses or talks to.
933 For a network connection, this value is nil. */)
934 (register Lisp_Object process
)
938 CHECK_PROCESS (process
);
939 pid
= XPROCESS (process
)->pid
;
940 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
943 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
944 doc
: /* Return the name of PROCESS, as a string.
945 This is the name of the program invoked in PROCESS,
946 possibly modified to make it unique among process names. */)
947 (register Lisp_Object process
)
949 CHECK_PROCESS (process
);
950 return XPROCESS (process
)->name
;
953 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
954 doc
: /* Return the command that was executed to start PROCESS.
955 This is a list of strings, the first string being the program executed
956 and the rest of the strings being the arguments given to it.
957 For a network or serial process, this is nil (process is running) or t
958 \(process is stopped). */)
959 (register Lisp_Object process
)
961 CHECK_PROCESS (process
);
962 return XPROCESS (process
)->command
;
965 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
966 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
967 This is the terminal that the process itself reads and writes on,
968 not the name of the pty that Emacs uses to talk with that terminal. */)
969 (register Lisp_Object process
)
971 CHECK_PROCESS (process
);
972 return XPROCESS (process
)->tty_name
;
975 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
977 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
979 (register Lisp_Object process
, Lisp_Object buffer
)
981 struct Lisp_Process
*p
;
983 CHECK_PROCESS (process
);
985 CHECK_BUFFER (buffer
);
986 p
= XPROCESS (process
);
987 pset_buffer (p
, buffer
);
988 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
989 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
990 setup_process_coding_systems (process
);
994 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
996 doc
: /* Return the buffer PROCESS is associated with.
997 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
998 (register Lisp_Object process
)
1000 CHECK_PROCESS (process
);
1001 return XPROCESS (process
)->buffer
;
1004 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
1006 doc
: /* Return the marker for the end of the last output from PROCESS. */)
1007 (register Lisp_Object process
)
1009 CHECK_PROCESS (process
);
1010 return XPROCESS (process
)->mark
;
1013 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1015 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1016 A value of t means stop accepting output from the process.
1018 When a process has a filter, its buffer is not used for output.
1019 Instead, each time it does output, the entire string of output is
1020 passed to the filter.
1022 The filter gets two arguments: the process and the string of output.
1023 The string argument is normally a multibyte string, except:
1024 - if the process' input coding system is no-conversion or raw-text,
1025 it is a unibyte string (the non-converted input), or else
1026 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1027 string (the result of converting the decoded input multibyte
1028 string to unibyte with `string-make-unibyte'). */)
1029 (register Lisp_Object process
, Lisp_Object filter
)
1031 struct Lisp_Process
*p
;
1033 CHECK_PROCESS (process
);
1034 p
= XPROCESS (process
);
1036 /* Don't signal an error if the process' input file descriptor
1037 is closed. This could make debugging Lisp more difficult,
1038 for example when doing something like
1040 (setq process (start-process ...))
1042 (set-process-filter process ...) */
1046 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1048 FD_CLR (p
->infd
, &input_wait_mask
);
1049 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1051 else if (EQ (p
->filter
, Qt
)
1052 /* Network or serial process not stopped: */
1053 && !EQ (p
->command
, Qt
))
1055 FD_SET (p
->infd
, &input_wait_mask
);
1056 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1060 pset_filter (p
, filter
);
1061 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1062 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1063 setup_process_coding_systems (process
);
1067 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1069 doc
: /* Returns the filter function of PROCESS; nil if none.
1070 See `set-process-filter' for more info on filter functions. */)
1071 (register Lisp_Object process
)
1073 CHECK_PROCESS (process
);
1074 return XPROCESS (process
)->filter
;
1077 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1079 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1080 The sentinel is called as a function when the process changes state.
1081 It gets two arguments: the process, and a string describing the change. */)
1082 (register Lisp_Object process
, Lisp_Object sentinel
)
1084 struct Lisp_Process
*p
;
1086 CHECK_PROCESS (process
);
1087 p
= XPROCESS (process
);
1089 pset_sentinel (p
, sentinel
);
1090 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1091 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1095 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1097 doc
: /* Return the sentinel of PROCESS; nil if none.
1098 See `set-process-sentinel' for more info on sentinels. */)
1099 (register Lisp_Object process
)
1101 CHECK_PROCESS (process
);
1102 return XPROCESS (process
)->sentinel
;
1105 DEFUN ("set-process-window-size", Fset_process_window_size
,
1106 Sset_process_window_size
, 3, 3, 0,
1107 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1108 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1110 CHECK_PROCESS (process
);
1111 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1112 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1114 if (XPROCESS (process
)->infd
< 0
1115 || set_window_size (XPROCESS (process
)->infd
,
1116 XINT (height
), XINT (width
)) <= 0)
1122 DEFUN ("set-process-inherit-coding-system-flag",
1123 Fset_process_inherit_coding_system_flag
,
1124 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1125 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1126 If the second argument FLAG is non-nil, then the variable
1127 `buffer-file-coding-system' of the buffer associated with PROCESS
1128 will be bound to the value of the coding system used to decode
1131 This is useful when the coding system specified for the process buffer
1132 leaves either the character code conversion or the end-of-line conversion
1133 unspecified, or if the coding system used to decode the process output
1134 is more appropriate for saving the process buffer.
1136 Binding the variable `inherit-process-coding-system' to non-nil before
1137 starting the process is an alternative way of setting the inherit flag
1138 for the process which will run.
1140 This function returns FLAG. */)
1141 (register Lisp_Object process
, Lisp_Object flag
)
1143 CHECK_PROCESS (process
);
1144 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1148 DEFUN ("set-process-query-on-exit-flag",
1149 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1151 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1152 If the second argument FLAG is non-nil, Emacs will query the user before
1153 exiting or killing a buffer if PROCESS is running. This function
1155 (register Lisp_Object process
, Lisp_Object flag
)
1157 CHECK_PROCESS (process
);
1158 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1162 DEFUN ("process-query-on-exit-flag",
1163 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1165 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1166 (register Lisp_Object process
)
1168 CHECK_PROCESS (process
);
1169 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1172 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1174 doc
: /* Return the contact info of PROCESS; t for a real child.
1175 For a network or serial connection, the value depends on the optional
1176 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1177 SERVICE) for a network connection or (PORT SPEED) for a serial
1178 connection. If KEY is t, the complete contact information for the
1179 connection is returned, else the specific value for the keyword KEY is
1180 returned. See `make-network-process' or `make-serial-process' for a
1181 list of keywords. */)
1182 (register Lisp_Object process
, Lisp_Object key
)
1184 Lisp_Object contact
;
1186 CHECK_PROCESS (process
);
1187 contact
= XPROCESS (process
)->childp
;
1189 #ifdef DATAGRAM_SOCKETS
1190 if (DATAGRAM_CONN_P (process
)
1191 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1192 contact
= Fplist_put (contact
, QCremote
,
1193 Fprocess_datagram_address (process
));
1196 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1198 if (NILP (key
) && NETCONN_P (process
))
1199 return Fcons (Fplist_get (contact
, QChost
),
1200 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1201 if (NILP (key
) && SERIALCONN_P (process
))
1202 return Fcons (Fplist_get (contact
, QCport
),
1203 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1204 return Fplist_get (contact
, key
);
1207 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1209 doc
: /* Return the plist of PROCESS. */)
1210 (register Lisp_Object process
)
1212 CHECK_PROCESS (process
);
1213 return XPROCESS (process
)->plist
;
1216 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1218 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1219 (register Lisp_Object process
, Lisp_Object plist
)
1221 CHECK_PROCESS (process
);
1224 pset_plist (XPROCESS (process
), plist
);
1228 #if 0 /* Turned off because we don't currently record this info
1229 in the process. Perhaps add it. */
1230 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1231 doc
: /* Return the connection type of PROCESS.
1232 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1233 a socket connection. */)
1234 (Lisp_Object process
)
1236 return XPROCESS (process
)->type
;
1240 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1241 doc
: /* Return the connection type of PROCESS.
1242 The value is either the symbol `real', `network', or `serial'.
1243 PROCESS may be a process, a buffer, the name of a process or buffer, or
1244 nil, indicating the current buffer's process. */)
1245 (Lisp_Object process
)
1248 proc
= get_process (process
);
1249 return XPROCESS (proc
)->type
;
1252 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1254 doc
: /* Convert network ADDRESS from internal format to a string.
1255 A 4 or 5 element vector represents an IPv4 address (with port number).
1256 An 8 or 9 element vector represents an IPv6 address (with port number).
1257 If optional second argument OMIT-PORT is non-nil, don't include a port
1258 number in the string, even when present in ADDRESS.
1259 Returns nil if format of ADDRESS is invalid. */)
1260 (Lisp_Object address
, Lisp_Object omit_port
)
1265 if (STRINGP (address
)) /* AF_LOCAL */
1268 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1270 register struct Lisp_Vector
*p
= XVECTOR (address
);
1271 ptrdiff_t size
= p
->header
.size
;
1272 Lisp_Object args
[10];
1275 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1277 args
[0] = build_string ("%d.%d.%d.%d");
1282 args
[0] = build_string ("%d.%d.%d.%d:%d");
1285 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1287 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1292 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1298 for (i
= 0; i
< nargs
; i
++)
1300 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1303 if (nargs
<= 5 /* IPv4 */
1304 && i
< 4 /* host, not port */
1305 && XINT (p
->contents
[i
]) > 255)
1308 args
[i
+1] = p
->contents
[i
];
1311 return Fformat (nargs
+1, args
);
1314 if (CONSP (address
))
1316 Lisp_Object args
[2];
1317 args
[0] = build_string ("<Family %d>");
1318 args
[1] = Fcar (address
);
1319 return Fformat (2, args
);
1325 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1326 doc
: /* Return a list of all processes. */)
1329 return Fmapcar (Qcdr
, Vprocess_alist
);
1332 /* Starting asynchronous inferior processes. */
1334 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1336 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1337 doc
: /* Start a program in a subprocess. Return the process object for it.
1338 NAME is name for process. It is modified if necessary to make it unique.
1339 BUFFER is the buffer (or buffer name) to associate with the process.
1341 Process output (both standard output and standard error streams) goes
1342 at end of BUFFER, unless you specify an output stream or filter
1343 function to handle the output. BUFFER may also be nil, meaning that
1344 this process is not associated with any buffer.
1346 PROGRAM is the program file name. It is searched for in `exec-path'
1347 (which see). If nil, just associate a pty with the buffer. Remaining
1348 arguments are strings to give program as arguments.
1350 If you want to separate standard output from standard error, invoke
1351 the command through a shell and redirect one of them using the shell
1354 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1355 (ptrdiff_t nargs
, Lisp_Object
*args
)
1357 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1358 register unsigned char **new_argv
;
1360 ptrdiff_t count
= SPECPDL_INDEX ();
1364 buffer
= Fget_buffer_create (buffer
);
1366 /* Make sure that the child will be able to chdir to the current
1367 buffer's current directory, or its unhandled equivalent. We
1368 can't just have the child check for an error when it does the
1369 chdir, since it's in a vfork.
1371 We have to GCPRO around this because Fexpand_file_name and
1372 Funhandled_file_name_directory might call a file name handling
1373 function. The argument list is protected by the caller, so all
1374 we really have to worry about is buffer. */
1376 struct gcpro gcpro1
, gcpro2
;
1378 current_dir
= BVAR (current_buffer
, directory
);
1380 GCPRO2 (buffer
, current_dir
);
1382 current_dir
= Funhandled_file_name_directory (current_dir
);
1383 if (NILP (current_dir
))
1384 /* If the file name handler says that current_dir is unreachable, use
1385 a sensible default. */
1386 current_dir
= build_string ("~/");
1387 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1388 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1389 report_file_error ("Setting current directory",
1390 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1396 CHECK_STRING (name
);
1400 if (!NILP (program
))
1401 CHECK_STRING (program
);
1403 proc
= make_process (name
);
1404 /* If an error occurs and we can't start the process, we want to
1405 remove it from the process list. This means that each error
1406 check in create_process doesn't need to call remove_process
1407 itself; it's all taken care of here. */
1408 record_unwind_protect (start_process_unwind
, proc
);
1410 pset_childp (XPROCESS (proc
), Qt
);
1411 pset_plist (XPROCESS (proc
), Qnil
);
1412 pset_type (XPROCESS (proc
), Qreal
);
1413 pset_buffer (XPROCESS (proc
), buffer
);
1414 pset_sentinel (XPROCESS (proc
), Qnil
);
1415 pset_filter (XPROCESS (proc
), Qnil
);
1416 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1419 /* AKA GNUTLS_INITSTAGE(proc). */
1420 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1421 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1424 #ifdef ADAPTIVE_READ_BUFFERING
1425 XPROCESS (proc
)->adaptive_read_buffering
1426 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1427 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1430 /* Make the process marker point into the process buffer (if any). */
1431 if (BUFFERP (buffer
))
1432 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1433 BUF_ZV (XBUFFER (buffer
)),
1434 BUF_ZV_BYTE (XBUFFER (buffer
)));
1437 /* Decide coding systems for communicating with the process. Here
1438 we don't setup the structure coding_system nor pay attention to
1439 unibyte mode. They are done in create_process. */
1441 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1442 Lisp_Object coding_systems
= Qt
;
1443 Lisp_Object val
, *args2
;
1444 struct gcpro gcpro1
, gcpro2
;
1446 val
= Vcoding_system_for_read
;
1449 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1450 args2
[0] = Qstart_process
;
1451 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1452 GCPRO2 (proc
, current_dir
);
1453 if (!NILP (program
))
1454 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1456 if (CONSP (coding_systems
))
1457 val
= XCAR (coding_systems
);
1458 else if (CONSP (Vdefault_process_coding_system
))
1459 val
= XCAR (Vdefault_process_coding_system
);
1461 pset_decode_coding_system (XPROCESS (proc
), val
);
1463 val
= Vcoding_system_for_write
;
1466 if (EQ (coding_systems
, Qt
))
1468 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1469 args2
[0] = Qstart_process
;
1470 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1471 GCPRO2 (proc
, current_dir
);
1472 if (!NILP (program
))
1473 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1476 if (CONSP (coding_systems
))
1477 val
= XCDR (coding_systems
);
1478 else if (CONSP (Vdefault_process_coding_system
))
1479 val
= XCDR (Vdefault_process_coding_system
);
1481 pset_encode_coding_system (XPROCESS (proc
), val
);
1482 /* Note: At this moment, the above coding system may leave
1483 text-conversion or eol-conversion unspecified. They will be
1484 decided after we read output from the process and decode it by
1485 some coding system, or just before we actually send a text to
1490 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1491 XPROCESS (proc
)->decoding_carryover
= 0;
1492 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1494 XPROCESS (proc
)->inherit_coding_system_flag
1495 = !(NILP (buffer
) || !inherit_process_coding_system
);
1497 if (!NILP (program
))
1499 /* If program file name is not absolute, search our path for it.
1500 Put the name we will really use in TEM. */
1501 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1502 && !(SCHARS (program
) > 1
1503 && IS_DEVICE_SEP (SREF (program
, 1))))
1505 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1508 GCPRO4 (name
, program
, buffer
, current_dir
);
1509 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1512 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1513 tem
= Fexpand_file_name (tem
, Qnil
);
1517 if (!NILP (Ffile_directory_p (program
)))
1518 error ("Specified program for new process is a directory");
1522 /* If program file name starts with /: for quoting a magic name,
1524 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1525 && SREF (tem
, 1) == ':')
1526 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1529 Lisp_Object arg_encoding
= Qnil
;
1530 struct gcpro gcpro1
;
1533 /* Encode the file name and put it in NEW_ARGV.
1534 That's where the child will use it to execute the program. */
1535 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1537 /* Here we encode arguments by the coding system used for sending
1538 data to the process. We don't support using different coding
1539 systems for encoding arguments and for encoding data sent to the
1542 for (i
= 3; i
< nargs
; i
++)
1544 tem
= Fcons (args
[i
], tem
);
1545 CHECK_STRING (XCAR (tem
));
1546 if (STRING_MULTIBYTE (XCAR (tem
)))
1548 if (NILP (arg_encoding
))
1549 arg_encoding
= (complement_process_encoding_system
1550 (XPROCESS (proc
)->encode_coding_system
));
1552 code_convert_string_norecord
1553 (XCAR (tem
), arg_encoding
, 1));
1560 /* Now that everything is encoded we can collect the strings into
1562 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1563 new_argv
[nargs
- 2] = 0;
1565 for (i
= nargs
- 2; i
-- != 0; )
1567 new_argv
[i
] = SDATA (XCAR (tem
));
1571 create_process (proc
, (char **) new_argv
, current_dir
);
1576 return unbind_to (count
, proc
);
1579 /* This function is the unwind_protect form for Fstart_process. If
1580 PROC doesn't have its pid set, then we know someone has signaled
1581 an error and the process wasn't started successfully, so we should
1582 remove it from the process list. */
1584 start_process_unwind (Lisp_Object proc
)
1586 if (!PROCESSP (proc
))
1589 /* Was PROC started successfully?
1590 -2 is used for a pty with no process, eg for gdb. */
1591 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1592 remove_process (proc
);
1598 create_process_1 (struct atimer
*timer
)
1600 /* Nothing to do. */
1605 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1607 int inchannel
, outchannel
;
1610 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1611 int wait_child_setup
[2];
1616 /* Use volatile to protect variables from being clobbered by vfork. */
1617 volatile int forkin
, forkout
;
1618 volatile int pty_flag
= 0;
1619 volatile Lisp_Object lisp_pty_name
= Qnil
;
1620 volatile Lisp_Object encoded_current_dir
;
1621 #if HAVE_WORKING_VFORK
1622 char **volatile save_environ
;
1625 inchannel
= outchannel
= -1;
1628 if (!NILP (Vprocess_connection_type
))
1629 outchannel
= inchannel
= allocate_pty ();
1633 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1634 /* On most USG systems it does not work to open the pty's tty here,
1635 then close it and reopen it in the child. */
1637 /* Don't let this terminal become our controlling terminal
1638 (in case we don't have one). */
1639 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1641 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1644 report_file_error ("Opening pty", Qnil
);
1646 forkin
= forkout
= -1;
1647 #endif /* not USG, or USG_SUBTTY_WORKS */
1649 lisp_pty_name
= build_string (pty_name
);
1652 #endif /* HAVE_PTYS */
1657 report_file_error ("Creating pipe", Qnil
);
1663 emacs_close (inchannel
);
1664 emacs_close (forkout
);
1665 report_file_error ("Creating pipe", Qnil
);
1671 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1675 tem
= pipe (wait_child_setup
);
1677 report_file_error ("Creating pipe", Qnil
);
1678 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1680 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1683 emacs_close (wait_child_setup
[0]);
1684 emacs_close (wait_child_setup
[1]);
1685 report_file_error ("Setting file descriptor flags", Qnil
);
1691 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1692 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1695 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1696 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1700 /* Record this as an active process, with its channels.
1701 As a result, child_setup will close Emacs's side of the pipes. */
1702 chan_process
[inchannel
] = process
;
1703 XPROCESS (process
)->infd
= inchannel
;
1704 XPROCESS (process
)->outfd
= outchannel
;
1706 /* Previously we recorded the tty descriptor used in the subprocess.
1707 It was only used for getting the foreground tty process, so now
1708 we just reopen the device (see emacs_get_tty_pgrp) as this is
1709 more portable (see USG_SUBTTY_WORKS above). */
1711 XPROCESS (process
)->pty_flag
= pty_flag
;
1712 pset_status (XPROCESS (process
), Qrun
);
1714 FD_SET (inchannel
, &input_wait_mask
);
1715 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1716 if (inchannel
> max_process_desc
)
1717 max_process_desc
= inchannel
;
1719 /* Until we store the proper pid, enable the SIGCHLD handler
1720 to recognize an unknown pid as standing for this process.
1721 It is very important not to let this `marker' value stay
1722 in the table after this function has returned; if it does
1723 it might cause call-process to hang and subsequent asynchronous
1724 processes to get their return values scrambled. */
1725 XPROCESS (process
)->pid
= -1;
1727 /* This must be called after the above line because it may signal an
1729 setup_process_coding_systems (process
);
1731 encoded_current_dir
= ENCODE_FILE (current_dir
);
1736 /* Block SIGCHLD until we have a chance to store the new fork's
1737 pid in its process structure. */
1738 sigemptyset (&blocked
);
1739 sigaddset (&blocked
, SIGCHLD
);
1740 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1743 #if HAVE_WORKING_VFORK
1744 /* child_setup must clobber environ on systems with true vfork.
1745 Protect it from permanent change. */
1746 save_environ
= environ
;
1752 #endif /* not WINDOWSNT */
1754 int xforkin
= forkin
;
1755 int xforkout
= forkout
;
1757 /* Make the pty be the controlling terminal of the process. */
1759 /* First, disconnect its current controlling terminal. */
1761 /* We tried doing setsid only if pty_flag, but it caused
1762 process_set_signal to fail on SGI when using a pipe. */
1764 /* Make the pty's terminal the controlling terminal. */
1765 if (pty_flag
&& xforkin
>= 0)
1768 /* We ignore the return value
1769 because faith@cs.unc.edu says that is necessary on Linux. */
1770 ioctl (xforkin
, TIOCSCTTY
, 0);
1773 #else /* not HAVE_SETSID */
1775 /* It's very important to call setpgrp here and no time
1776 afterwards. Otherwise, we lose our controlling tty which
1777 is set when we open the pty. */
1780 #endif /* not HAVE_SETSID */
1781 #if defined (LDISC1)
1782 if (pty_flag
&& xforkin
>= 0)
1785 tcgetattr (xforkin
, &t
);
1787 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1788 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1791 #if defined (NTTYDISC) && defined (TIOCSETD)
1792 if (pty_flag
&& xforkin
>= 0)
1794 /* Use new line discipline. */
1795 int ldisc
= NTTYDISC
;
1796 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1801 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1802 can do TIOCSPGRP only to the process's controlling tty. */
1805 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1806 I can't test it since I don't have 4.3. */
1807 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1810 ioctl (j
, TIOCNOTTY
, 0);
1814 /* In order to get a controlling terminal on some versions
1815 of BSD, it is necessary to put the process in pgrp 0
1816 before it opens the terminal. */
1824 #endif /* TIOCNOTTY */
1826 #if !defined (DONT_REOPEN_PTY)
1827 /*** There is a suggestion that this ought to be a
1828 conditional on TIOCSPGRP,
1829 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1830 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1831 that system does seem to need this code, even though
1832 both HAVE_SETSID and TIOCSCTTY are defined. */
1833 /* Now close the pty (if we had it open) and reopen it.
1834 This makes the pty the controlling terminal of the subprocess. */
1838 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1841 emacs_close (xforkin
);
1842 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1846 emacs_write (1, "Couldn't open the pty terminal ", 31);
1847 emacs_write (1, pty_name
, strlen (pty_name
));
1848 emacs_write (1, "\n", 1);
1853 #endif /* not DONT_REOPEN_PTY */
1855 #ifdef SETUP_SLAVE_PTY
1860 #endif /* SETUP_SLAVE_PTY */
1862 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1863 Now reenable it in the child, so it will die when we want it to. */
1865 signal (SIGHUP
, SIG_DFL
);
1867 #endif /* HAVE_PTYS */
1869 signal (SIGINT
, SIG_DFL
);
1870 signal (SIGQUIT
, SIG_DFL
);
1872 /* Emacs ignores SIGPIPE, but the child should not. */
1873 signal (SIGPIPE
, SIG_DFL
);
1876 /* Stop blocking signals in the child. */
1877 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1881 child_setup_tty (xforkout
);
1883 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1884 new_argv
, 1, encoded_current_dir
);
1885 #else /* not WINDOWSNT */
1887 emacs_close (wait_child_setup
[0]);
1889 child_setup (xforkin
, xforkout
, xforkout
,
1890 new_argv
, 1, encoded_current_dir
);
1891 #endif /* not WINDOWSNT */
1894 /* Back in the parent process. */
1896 #if HAVE_WORKING_VFORK
1897 environ
= save_environ
;
1900 XPROCESS (process
)->pid
= pid
;
1902 /* Stop blocking signals in the parent. */
1904 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1911 emacs_close (forkin
);
1912 if (forkin
!= forkout
&& forkout
>= 0)
1913 emacs_close (forkout
);
1917 /* vfork succeeded. */
1920 register_child (pid
, inchannel
);
1921 #endif /* WINDOWSNT */
1923 /* If the subfork execv fails, and it exits,
1924 this close hangs. I don't know why.
1925 So have an interrupt jar it loose. */
1927 struct atimer
*timer
;
1928 EMACS_TIME offset
= make_emacs_time (1, 0);
1931 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1934 emacs_close (forkin
);
1936 cancel_atimer (timer
);
1940 if (forkin
!= forkout
&& forkout
>= 0)
1941 emacs_close (forkout
);
1943 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1945 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1946 /* Wait for child_setup to complete in case that vfork is
1947 actually defined as fork. The descriptor wait_child_setup[1]
1948 of a pipe is closed at the child side either by close-on-exec
1949 on successful execvp or the _exit call in child_setup. */
1953 emacs_close (wait_child_setup
[1]);
1954 emacs_read (wait_child_setup
[0], &dummy
, 1);
1955 emacs_close (wait_child_setup
[0]);
1960 /* Now generate the error if vfork failed. */
1962 report_file_error ("Doing vfork", Qnil
);
1966 create_pty (Lisp_Object process
)
1968 int inchannel
, outchannel
;
1971 inchannel
= outchannel
= -1;
1974 if (!NILP (Vprocess_connection_type
))
1975 outchannel
= inchannel
= allocate_pty ();
1979 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1980 /* On most USG systems it does not work to open the pty's tty here,
1981 then close it and reopen it in the child. */
1983 /* Don't let this terminal become our controlling terminal
1984 (in case we don't have one). */
1985 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1987 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1990 report_file_error ("Opening pty", Qnil
);
1991 #if defined (DONT_REOPEN_PTY)
1992 /* In the case that vfork is defined as fork, the parent process
1993 (Emacs) may send some data before the child process completes
1994 tty options setup. So we setup tty before forking. */
1995 child_setup_tty (forkout
);
1996 #endif /* DONT_REOPEN_PTY */
1997 #endif /* not USG, or USG_SUBTTY_WORKS */
2000 #endif /* HAVE_PTYS */
2003 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2004 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2007 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2008 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2012 /* Record this as an active process, with its channels.
2013 As a result, child_setup will close Emacs's side of the pipes. */
2014 chan_process
[inchannel
] = process
;
2015 XPROCESS (process
)->infd
= inchannel
;
2016 XPROCESS (process
)->outfd
= outchannel
;
2018 /* Previously we recorded the tty descriptor used in the subprocess.
2019 It was only used for getting the foreground tty process, so now
2020 we just reopen the device (see emacs_get_tty_pgrp) as this is
2021 more portable (see USG_SUBTTY_WORKS above). */
2023 XPROCESS (process
)->pty_flag
= pty_flag
;
2024 pset_status (XPROCESS (process
), Qrun
);
2025 setup_process_coding_systems (process
);
2027 FD_SET (inchannel
, &input_wait_mask
);
2028 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2029 if (inchannel
> max_process_desc
)
2030 max_process_desc
= inchannel
;
2032 XPROCESS (process
)->pid
= -2;
2035 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2038 pset_tty_name (XPROCESS (process
), Qnil
);
2042 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2043 The address family of sa is not included in the result. */
2046 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2048 Lisp_Object address
;
2051 register struct Lisp_Vector
*p
;
2053 /* Workaround for a bug in getsockname on BSD: Names bound to
2054 sockets in the UNIX domain are inaccessible; getsockname returns
2055 a zero length name. */
2056 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2057 return empty_unibyte_string
;
2059 switch (sa
->sa_family
)
2063 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2064 len
= sizeof (sin
->sin_addr
) + 1;
2065 address
= Fmake_vector (make_number (len
), Qnil
);
2066 p
= XVECTOR (address
);
2067 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2068 cp
= (unsigned char *) &sin
->sin_addr
;
2074 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2075 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2076 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2077 address
= Fmake_vector (make_number (len
), Qnil
);
2078 p
= XVECTOR (address
);
2079 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2080 for (i
= 0; i
< len
; i
++)
2081 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2085 #ifdef HAVE_LOCAL_SOCKETS
2088 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2089 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2090 if (sockun
->sun_path
[i
] == 0)
2092 return make_unibyte_string (sockun
->sun_path
, i
);
2096 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2097 address
= Fcons (make_number (sa
->sa_family
),
2098 Fmake_vector (make_number (len
), Qnil
));
2099 p
= XVECTOR (XCDR (address
));
2100 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2106 p
->contents
[i
++] = make_number (*cp
++);
2112 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2115 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2117 register struct Lisp_Vector
*p
;
2119 if (VECTORP (address
))
2121 p
= XVECTOR (address
);
2122 if (p
->header
.size
== 5)
2125 return sizeof (struct sockaddr_in
);
2128 else if (p
->header
.size
== 9)
2130 *familyp
= AF_INET6
;
2131 return sizeof (struct sockaddr_in6
);
2135 #ifdef HAVE_LOCAL_SOCKETS
2136 else if (STRINGP (address
))
2138 *familyp
= AF_LOCAL
;
2139 return sizeof (struct sockaddr_un
);
2142 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2143 && VECTORP (XCDR (address
)))
2145 struct sockaddr
*sa
;
2146 *familyp
= XINT (XCAR (address
));
2147 p
= XVECTOR (XCDR (address
));
2148 return p
->header
.size
+ sizeof (sa
->sa_family
);
2153 /* Convert an address object (vector or string) to an internal sockaddr.
2155 The address format has been basically validated by
2156 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2157 it could have come from user data. So if FAMILY is not valid,
2158 we return after zeroing *SA. */
2161 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2163 register struct Lisp_Vector
*p
;
2164 register unsigned char *cp
= NULL
;
2168 memset (sa
, 0, len
);
2170 if (VECTORP (address
))
2172 p
= XVECTOR (address
);
2173 if (family
== AF_INET
)
2175 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2176 len
= sizeof (sin
->sin_addr
) + 1;
2177 hostport
= XINT (p
->contents
[--len
]);
2178 sin
->sin_port
= htons (hostport
);
2179 cp
= (unsigned char *)&sin
->sin_addr
;
2180 sa
->sa_family
= family
;
2183 else if (family
== AF_INET6
)
2185 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2186 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2187 len
= sizeof (sin6
->sin6_addr
) + 1;
2188 hostport
= XINT (p
->contents
[--len
]);
2189 sin6
->sin6_port
= htons (hostport
);
2190 for (i
= 0; i
< len
; i
++)
2191 if (INTEGERP (p
->contents
[i
]))
2193 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2196 sa
->sa_family
= family
;
2203 else if (STRINGP (address
))
2205 #ifdef HAVE_LOCAL_SOCKETS
2206 if (family
== AF_LOCAL
)
2208 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2209 cp
= SDATA (address
);
2210 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2211 sockun
->sun_path
[i
] = *cp
++;
2212 sa
->sa_family
= family
;
2219 p
= XVECTOR (XCDR (address
));
2220 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2223 for (i
= 0; i
< len
; i
++)
2224 if (INTEGERP (p
->contents
[i
]))
2225 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2228 #ifdef DATAGRAM_SOCKETS
2229 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2231 doc
: /* Get the current datagram address associated with PROCESS. */)
2232 (Lisp_Object process
)
2236 CHECK_PROCESS (process
);
2238 if (!DATAGRAM_CONN_P (process
))
2241 channel
= XPROCESS (process
)->infd
;
2242 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2243 datagram_address
[channel
].len
);
2246 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2248 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2249 Returns nil upon error setting address, ADDRESS otherwise. */)
2250 (Lisp_Object process
, Lisp_Object address
)
2255 CHECK_PROCESS (process
);
2257 if (!DATAGRAM_CONN_P (process
))
2260 channel
= XPROCESS (process
)->infd
;
2262 len
= get_lisp_to_sockaddr_size (address
, &family
);
2263 if (datagram_address
[channel
].len
!= len
)
2265 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2271 static const struct socket_options
{
2272 /* The name of this option. Should be lowercase version of option
2273 name without SO_ prefix. */
2275 /* Option level SOL_... */
2277 /* Option number SO_... */
2279 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2280 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2281 } socket_options
[] =
2283 #ifdef SO_BINDTODEVICE
2284 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2287 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2290 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2293 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2296 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2299 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2302 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2305 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2307 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2310 /* Set option OPT to value VAL on socket S.
2312 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2313 Signals an error if setting a known option fails.
2317 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2320 const struct socket_options
*sopt
;
2325 name
= SSDATA (SYMBOL_NAME (opt
));
2326 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2327 if (strcmp (name
, sopt
->name
) == 0)
2330 switch (sopt
->opttype
)
2335 optval
= NILP (val
) ? 0 : 1;
2336 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2337 &optval
, sizeof (optval
));
2344 if (TYPE_RANGED_INTEGERP (int, val
))
2345 optval
= XINT (val
);
2347 error ("Bad option value for %s", name
);
2348 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2349 &optval
, sizeof (optval
));
2353 #ifdef SO_BINDTODEVICE
2356 char devname
[IFNAMSIZ
+1];
2358 /* This is broken, at least in the Linux 2.4 kernel.
2359 To unbind, the arg must be a zero integer, not the empty string.
2360 This should work on all systems. KFS. 2003-09-23. */
2361 memset (devname
, 0, sizeof devname
);
2364 char *arg
= SSDATA (val
);
2365 int len
= min (strlen (arg
), IFNAMSIZ
);
2366 memcpy (devname
, arg
, len
);
2368 else if (!NILP (val
))
2369 error ("Bad option value for %s", name
);
2370 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2379 struct linger linger
;
2382 linger
.l_linger
= 0;
2383 if (TYPE_RANGED_INTEGERP (int, val
))
2384 linger
.l_linger
= XINT (val
);
2386 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2387 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2388 &linger
, sizeof (linger
));
2398 report_file_error ("Cannot set network option",
2399 Fcons (opt
, Fcons (val
, Qnil
)));
2400 return (1 << sopt
->optbit
);
2404 DEFUN ("set-network-process-option",
2405 Fset_network_process_option
, Sset_network_process_option
,
2407 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2408 See `make-network-process' for a list of options and values.
2409 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2410 OPTION is not a supported option, return nil instead; otherwise return t. */)
2411 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2414 struct Lisp_Process
*p
;
2416 CHECK_PROCESS (process
);
2417 p
= XPROCESS (process
);
2418 if (!NETCONN1_P (p
))
2419 error ("Process is not a network process");
2423 error ("Process is not running");
2425 if (set_socket_option (s
, option
, value
))
2427 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2431 if (NILP (no_error
))
2432 error ("Unknown or unsupported option");
2438 DEFUN ("serial-process-configure",
2439 Fserial_process_configure
,
2440 Sserial_process_configure
,
2442 doc
: /* Configure speed, bytesize, etc. of a serial process.
2444 Arguments are specified as keyword/argument pairs. Attributes that
2445 are not given are re-initialized from the process's current
2446 configuration (available via the function `process-contact') or set to
2447 reasonable default values. The following arguments are defined:
2453 -- Any of these arguments can be given to identify the process that is
2454 to be configured. If none of these arguments is given, the current
2455 buffer's process is used.
2457 :speed SPEED -- SPEED is the speed of the serial port in bits per
2458 second, also called baud rate. Any value can be given for SPEED, but
2459 most serial ports work only at a few defined values between 1200 and
2460 115200, with 9600 being the most common value. If SPEED is nil, the
2461 serial port is not configured any further, i.e., all other arguments
2462 are ignored. This may be useful for special serial ports such as
2463 Bluetooth-to-serial converters which can only be configured through AT
2464 commands. A value of nil for SPEED can be used only when passed
2465 through `make-serial-process' or `serial-term'.
2467 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2468 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2470 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2471 `odd' (use odd parity), or the symbol `even' (use even parity). If
2472 PARITY is not given, no parity is used.
2474 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2475 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2476 is not given or nil, 1 stopbit is used.
2478 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2479 flowcontrol to be used, which is either nil (don't use flowcontrol),
2480 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2481 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2482 flowcontrol is used.
2484 `serial-process-configure' is called by `make-serial-process' for the
2485 initial configuration of the serial port.
2489 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2491 \(serial-process-configure
2492 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2494 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2496 usage: (serial-process-configure &rest ARGS) */)
2497 (ptrdiff_t nargs
, Lisp_Object
*args
)
2499 struct Lisp_Process
*p
;
2500 Lisp_Object contact
= Qnil
;
2501 Lisp_Object proc
= Qnil
;
2502 struct gcpro gcpro1
;
2504 contact
= Flist (nargs
, args
);
2507 proc
= Fplist_get (contact
, QCprocess
);
2509 proc
= Fplist_get (contact
, QCname
);
2511 proc
= Fplist_get (contact
, QCbuffer
);
2513 proc
= Fplist_get (contact
, QCport
);
2514 proc
= get_process (proc
);
2515 p
= XPROCESS (proc
);
2516 if (!EQ (p
->type
, Qserial
))
2517 error ("Not a serial process");
2519 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2525 serial_configure (p
, contact
);
2531 /* Used by make-serial-process to recover from errors. */
2533 make_serial_process_unwind (Lisp_Object proc
)
2535 if (!PROCESSP (proc
))
2537 remove_process (proc
);
2541 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2543 doc
: /* Create and return a serial port process.
2545 In Emacs, serial port connections are represented by process objects,
2546 so input and output work as for subprocesses, and `delete-process'
2547 closes a serial port connection. However, a serial process has no
2548 process id, it cannot be signaled, and the status codes are different
2549 from normal processes.
2551 `make-serial-process' creates a process and a buffer, on which you
2552 probably want to use `process-send-string'. Try \\[serial-term] for
2553 an interactive terminal. See below for examples.
2555 Arguments are specified as keyword/argument pairs. The following
2556 arguments are defined:
2558 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2559 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2560 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2561 the backslashes in strings).
2563 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2564 which this function calls.
2566 :name NAME -- NAME is the name of the process. If NAME is not given,
2567 the value of PORT is used.
2569 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2570 with the process. Process output goes at the end of that buffer,
2571 unless you specify an output stream or filter function to handle the
2572 output. If BUFFER is not given, the value of NAME is used.
2574 :coding CODING -- If CODING is a symbol, it specifies the coding
2575 system used for both reading and writing for this process. If CODING
2576 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2577 ENCODING is used for writing.
2579 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2580 the process is running. If BOOL is not given, query before exiting.
2582 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2583 In the stopped state, a serial process does not accept incoming data,
2584 but you can send outgoing data. The stopped state is cleared by
2585 `continue-process' and set by `stop-process'.
2587 :filter FILTER -- Install FILTER as the process filter.
2589 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2591 :plist PLIST -- Install PLIST as the initial plist of the process.
2597 -- This function calls `serial-process-configure' to handle these
2600 The original argument list, possibly modified by later configuration,
2601 is available via the function `process-contact'.
2605 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2607 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2609 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2611 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2613 usage: (make-serial-process &rest ARGS) */)
2614 (ptrdiff_t nargs
, Lisp_Object
*args
)
2617 Lisp_Object proc
, contact
, port
;
2618 struct Lisp_Process
*p
;
2619 struct gcpro gcpro1
;
2620 Lisp_Object name
, buffer
;
2621 Lisp_Object tem
, val
;
2622 ptrdiff_t specpdl_count
= -1;
2627 contact
= Flist (nargs
, args
);
2630 port
= Fplist_get (contact
, QCport
);
2632 error ("No port specified");
2633 CHECK_STRING (port
);
2635 if (NILP (Fplist_member (contact
, QCspeed
)))
2636 error (":speed not specified");
2637 if (!NILP (Fplist_get (contact
, QCspeed
)))
2638 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2640 name
= Fplist_get (contact
, QCname
);
2643 CHECK_STRING (name
);
2644 proc
= make_process (name
);
2645 specpdl_count
= SPECPDL_INDEX ();
2646 record_unwind_protect (make_serial_process_unwind
, proc
);
2647 p
= XPROCESS (proc
);
2649 fd
= serial_open (SSDATA (port
));
2652 if (fd
> max_process_desc
)
2653 max_process_desc
= fd
;
2654 chan_process
[fd
] = proc
;
2656 buffer
= Fplist_get (contact
, QCbuffer
);
2659 buffer
= Fget_buffer_create (buffer
);
2660 pset_buffer (p
, buffer
);
2662 pset_childp (p
, contact
);
2663 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2664 pset_type (p
, Qserial
);
2665 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2666 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2668 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2669 p
->kill_without_query
= 1;
2670 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2671 pset_command (p
, Qt
);
2674 if (!EQ (p
->command
, Qt
))
2676 FD_SET (fd
, &input_wait_mask
);
2677 FD_SET (fd
, &non_keyboard_wait_mask
);
2680 if (BUFFERP (buffer
))
2682 set_marker_both (p
->mark
, buffer
,
2683 BUF_ZV (XBUFFER (buffer
)),
2684 BUF_ZV_BYTE (XBUFFER (buffer
)));
2687 tem
= Fplist_member (contact
, QCcoding
);
2688 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2694 val
= XCAR (XCDR (tem
));
2698 else if (!NILP (Vcoding_system_for_read
))
2699 val
= Vcoding_system_for_read
;
2700 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2701 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2703 pset_decode_coding_system (p
, val
);
2708 val
= XCAR (XCDR (tem
));
2712 else if (!NILP (Vcoding_system_for_write
))
2713 val
= Vcoding_system_for_write
;
2714 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2715 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2717 pset_encode_coding_system (p
, val
);
2719 setup_process_coding_systems (proc
);
2720 pset_decoding_buf (p
, empty_unibyte_string
);
2721 p
->decoding_carryover
= 0;
2722 pset_encoding_buf (p
, empty_unibyte_string
);
2723 p
->inherit_coding_system_flag
2724 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2726 Fserial_process_configure (nargs
, args
);
2728 specpdl_ptr
= specpdl
+ specpdl_count
;
2734 /* Create a network stream/datagram client/server process. Treated
2735 exactly like a normal process when reading and writing. Primary
2736 differences are in status display and process deletion. A network
2737 connection has no PID; you cannot signal it. All you can do is
2738 stop/continue it and deactivate/close it via delete-process */
2740 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2742 doc
: /* Create and return a network server or client process.
2744 In Emacs, network connections are represented by process objects, so
2745 input and output work as for subprocesses and `delete-process' closes
2746 a network connection. However, a network process has no process id,
2747 it cannot be signaled, and the status codes are different from normal
2750 Arguments are specified as keyword/argument pairs. The following
2751 arguments are defined:
2753 :name NAME -- NAME is name for process. It is modified if necessary
2756 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2757 with the process. Process output goes at end of that buffer, unless
2758 you specify an output stream or filter function to handle the output.
2759 BUFFER may be also nil, meaning that this process is not associated
2762 :host HOST -- HOST is name of the host to connect to, or its IP
2763 address. The symbol `local' specifies the local host. If specified
2764 for a server process, it must be a valid name or address for the local
2765 host, and only clients connecting to that address will be accepted.
2767 :service SERVICE -- SERVICE is name of the service desired, or an
2768 integer specifying a port number to connect to. If SERVICE is t,
2769 a random port number is selected for the server. (If Emacs was
2770 compiled with getaddrinfo, a port number can also be specified as a
2771 string, e.g. "80", as well as an integer. This is not portable.)
2773 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2774 stream type connection, `datagram' creates a datagram type connection,
2775 `seqpacket' creates a reliable datagram connection.
2777 :family FAMILY -- FAMILY is the address (and protocol) family for the
2778 service specified by HOST and SERVICE. The default (nil) is to use
2779 whatever address family (IPv4 or IPv6) that is defined for the host
2780 and port number specified by HOST and SERVICE. Other address families
2782 local -- for a local (i.e. UNIX) address specified by SERVICE.
2783 ipv4 -- use IPv4 address family only.
2784 ipv6 -- use IPv6 address family only.
2786 :local ADDRESS -- ADDRESS is the local address used for the connection.
2787 This parameter is ignored when opening a client process. When specified
2788 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2790 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2791 connection. This parameter is ignored when opening a stream server
2792 process. For a datagram server process, it specifies the initial
2793 setting of the remote datagram address. When specified for a client
2794 process, the FAMILY, HOST, and SERVICE args are ignored.
2796 The format of ADDRESS depends on the address family:
2797 - An IPv4 address is represented as an vector of integers [A B C D P]
2798 corresponding to numeric IP address A.B.C.D and port number P.
2799 - A local address is represented as a string with the address in the
2800 local address space.
2801 - An "unsupported family" address is represented by a cons (F . AV)
2802 where F is the family number and AV is a vector containing the socket
2803 address data with one element per address data byte. Do not rely on
2804 this format in portable code, as it may depend on implementation
2805 defined constants, data sizes, and data structure alignment.
2807 :coding CODING -- If CODING is a symbol, it specifies the coding
2808 system used for both reading and writing for this process. If CODING
2809 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2810 ENCODING is used for writing.
2812 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2813 return without waiting for the connection to complete; instead, the
2814 sentinel function will be called with second arg matching "open" (if
2815 successful) or "failed" when the connect completes. Default is to use
2816 a blocking connect (i.e. wait) for stream type connections.
2818 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2819 running when Emacs is exited.
2821 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2822 In the stopped state, a server process does not accept new
2823 connections, and a client process does not handle incoming traffic.
2824 The stopped state is cleared by `continue-process' and set by
2827 :filter FILTER -- Install FILTER as the process filter.
2829 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2830 process filter are multibyte, otherwise they are unibyte.
2831 If this keyword is not specified, the strings are multibyte if
2832 the default value of `enable-multibyte-characters' is non-nil.
2834 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2836 :log LOG -- Install LOG as the server process log function. This
2837 function is called when the server accepts a network connection from a
2838 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2839 is the server process, CLIENT is the new process for the connection,
2840 and MESSAGE is a string.
2842 :plist PLIST -- Install PLIST as the new process' initial plist.
2844 :server QLEN -- if QLEN is non-nil, create a server process for the
2845 specified FAMILY, SERVICE, and connection type (stream or datagram).
2846 If QLEN is an integer, it is used as the max. length of the server's
2847 pending connection queue (also known as the backlog); the default
2848 queue length is 5. Default is to create a client process.
2850 The following network options can be specified for this connection:
2852 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2853 :dontroute BOOL -- Only send to directly connected hosts.
2854 :keepalive BOOL -- Send keep-alive messages on network stream.
2855 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2856 :oobinline BOOL -- Place out-of-band data in receive data stream.
2857 :priority INT -- Set protocol defined priority for sent packets.
2858 :reuseaddr BOOL -- Allow reusing a recently used local address
2859 (this is allowed by default for a server process).
2860 :bindtodevice NAME -- bind to interface NAME. Using this may require
2861 special privileges on some systems.
2863 Consult the relevant system programmer's manual pages for more
2864 information on using these options.
2867 A server process will listen for and accept connections from clients.
2868 When a client connection is accepted, a new network process is created
2869 for the connection with the following parameters:
2871 - The client's process name is constructed by concatenating the server
2872 process' NAME and a client identification string.
2873 - If the FILTER argument is non-nil, the client process will not get a
2874 separate process buffer; otherwise, the client's process buffer is a newly
2875 created buffer named after the server process' BUFFER name or process
2876 NAME concatenated with the client identification string.
2877 - The connection type and the process filter and sentinel parameters are
2878 inherited from the server process' TYPE, FILTER and SENTINEL.
2879 - The client process' contact info is set according to the client's
2880 addressing information (typically an IP address and a port number).
2881 - The client process' plist is initialized from the server's plist.
2883 Notice that the FILTER and SENTINEL args are never used directly by
2884 the server process. Also, the BUFFER argument is not used directly by
2885 the server process, but via the optional :log function, accepted (and
2886 failed) connections may be logged in the server process' buffer.
2888 The original argument list, modified with the actual connection
2889 information, is available via the `process-contact' function.
2891 usage: (make-network-process &rest ARGS) */)
2892 (ptrdiff_t nargs
, Lisp_Object
*args
)
2895 Lisp_Object contact
;
2896 struct Lisp_Process
*p
;
2897 #ifdef HAVE_GETADDRINFO
2898 struct addrinfo ai
, *res
, *lres
;
2899 struct addrinfo hints
;
2900 const char *portstring
;
2902 #else /* HAVE_GETADDRINFO */
2903 struct _emacs_addrinfo
2909 struct sockaddr
*ai_addr
;
2910 struct _emacs_addrinfo
*ai_next
;
2912 #endif /* HAVE_GETADDRINFO */
2913 struct sockaddr_in address_in
;
2914 #ifdef HAVE_LOCAL_SOCKETS
2915 struct sockaddr_un address_un
;
2920 int s
= -1, outch
, inch
;
2921 struct gcpro gcpro1
;
2922 ptrdiff_t count
= SPECPDL_INDEX ();
2924 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2926 Lisp_Object name
, buffer
, host
, service
, address
;
2927 Lisp_Object filter
, sentinel
;
2928 int is_non_blocking_client
= 0;
2929 int is_server
= 0, backlog
= 5;
2936 /* Save arguments for process-contact and clone-process. */
2937 contact
= Flist (nargs
, args
);
2941 /* Ensure socket support is loaded if available. */
2942 init_winsock (TRUE
);
2945 /* :type TYPE (nil: stream, datagram */
2946 tem
= Fplist_get (contact
, QCtype
);
2948 socktype
= SOCK_STREAM
;
2949 #ifdef DATAGRAM_SOCKETS
2950 else if (EQ (tem
, Qdatagram
))
2951 socktype
= SOCK_DGRAM
;
2953 #ifdef HAVE_SEQPACKET
2954 else if (EQ (tem
, Qseqpacket
))
2955 socktype
= SOCK_SEQPACKET
;
2958 error ("Unsupported connection type");
2961 tem
= Fplist_get (contact
, QCserver
);
2964 /* Don't support network sockets when non-blocking mode is
2965 not available, since a blocked Emacs is not useful. */
2966 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2967 error ("Network servers not supported");
2970 if (TYPE_RANGED_INTEGERP (int, tem
))
2971 backlog
= XINT (tem
);
2975 /* Make QCaddress an alias for :local (server) or :remote (client). */
2976 QCaddress
= is_server
? QClocal
: QCremote
;
2979 if (!is_server
&& socktype
!= SOCK_DGRAM
2980 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2982 #ifndef NON_BLOCKING_CONNECT
2983 error ("Non-blocking connect not supported");
2985 is_non_blocking_client
= 1;
2989 name
= Fplist_get (contact
, QCname
);
2990 buffer
= Fplist_get (contact
, QCbuffer
);
2991 filter
= Fplist_get (contact
, QCfilter
);
2992 sentinel
= Fplist_get (contact
, QCsentinel
);
2994 CHECK_STRING (name
);
2996 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2997 ai
.ai_socktype
= socktype
;
3002 /* :local ADDRESS or :remote ADDRESS */
3003 address
= Fplist_get (contact
, QCaddress
);
3004 if (!NILP (address
))
3006 host
= service
= Qnil
;
3008 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3009 error ("Malformed :address");
3010 ai
.ai_family
= family
;
3011 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3012 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3016 /* :family FAMILY -- nil (for Inet), local, or integer. */
3017 tem
= Fplist_get (contact
, QCfamily
);
3020 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3026 #ifdef HAVE_LOCAL_SOCKETS
3027 else if (EQ (tem
, Qlocal
))
3031 else if (EQ (tem
, Qipv6
))
3034 else if (EQ (tem
, Qipv4
))
3036 else if (TYPE_RANGED_INTEGERP (int, tem
))
3037 family
= XINT (tem
);
3039 error ("Unknown address family");
3041 ai
.ai_family
= family
;
3043 /* :service SERVICE -- string, integer (port number), or t (random port). */
3044 service
= Fplist_get (contact
, QCservice
);
3046 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3047 host
= Fplist_get (contact
, QChost
);
3050 if (EQ (host
, Qlocal
))
3051 /* Depending on setup, "localhost" may map to different IPv4 and/or
3052 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3053 host
= build_string ("127.0.0.1");
3054 CHECK_STRING (host
);
3057 #ifdef HAVE_LOCAL_SOCKETS
3058 if (family
== AF_LOCAL
)
3062 message (":family local ignores the :host \"%s\" property",
3064 contact
= Fplist_put (contact
, QChost
, Qnil
);
3067 CHECK_STRING (service
);
3068 memset (&address_un
, 0, sizeof address_un
);
3069 address_un
.sun_family
= AF_LOCAL
;
3070 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3071 error ("Service name too long");
3072 strcpy (address_un
.sun_path
, SSDATA (service
));
3073 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3074 ai
.ai_addrlen
= sizeof address_un
;
3079 /* Slow down polling to every ten seconds.
3080 Some kernels have a bug which causes retrying connect to fail
3081 after a connect. Polling can interfere with gethostbyname too. */
3082 #ifdef POLL_FOR_INPUT
3083 if (socktype
!= SOCK_DGRAM
)
3085 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3086 bind_polling_period (10);
3090 #ifdef HAVE_GETADDRINFO
3091 /* If we have a host, use getaddrinfo to resolve both host and service.
3092 Otherwise, use getservbyname to lookup the service. */
3096 /* SERVICE can either be a string or int.
3097 Convert to a C string for later use by getaddrinfo. */
3098 if (EQ (service
, Qt
))
3100 else if (INTEGERP (service
))
3102 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3103 portstring
= portbuf
;
3107 CHECK_STRING (service
);
3108 portstring
= SSDATA (service
);
3113 memset (&hints
, 0, sizeof (hints
));
3115 hints
.ai_family
= family
;
3116 hints
.ai_socktype
= socktype
;
3117 hints
.ai_protocol
= 0;
3119 #ifdef HAVE_RES_INIT
3123 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3125 #ifdef HAVE_GAI_STRERROR
3126 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3128 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3134 #endif /* HAVE_GETADDRINFO */
3136 /* We end up here if getaddrinfo is not defined, or in case no hostname
3137 has been specified (e.g. for a local server process). */
3139 if (EQ (service
, Qt
))
3141 else if (INTEGERP (service
))
3142 port
= htons ((unsigned short) XINT (service
));
3145 struct servent
*svc_info
;
3146 CHECK_STRING (service
);
3147 svc_info
= getservbyname (SSDATA (service
),
3148 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3150 error ("Unknown service: %s", SDATA (service
));
3151 port
= svc_info
->s_port
;
3154 memset (&address_in
, 0, sizeof address_in
);
3155 address_in
.sin_family
= family
;
3156 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3157 address_in
.sin_port
= port
;
3159 #ifndef HAVE_GETADDRINFO
3162 struct hostent
*host_info_ptr
;
3164 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3165 as it may `hang' Emacs for a very long time. */
3169 #ifdef HAVE_RES_INIT
3173 host_info_ptr
= gethostbyname (SDATA (host
));
3178 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3179 host_info_ptr
->h_length
);
3180 family
= host_info_ptr
->h_addrtype
;
3181 address_in
.sin_family
= family
;
3184 /* Attempt to interpret host as numeric inet address */
3186 unsigned long numeric_addr
;
3187 numeric_addr
= inet_addr (SSDATA (host
));
3188 if (numeric_addr
== -1)
3189 error ("Unknown host \"%s\"", SDATA (host
));
3191 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3192 sizeof (address_in
.sin_addr
));
3196 #endif /* not HAVE_GETADDRINFO */
3198 ai
.ai_family
= family
;
3199 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3200 ai
.ai_addrlen
= sizeof address_in
;
3204 /* Do this in case we never enter the for-loop below. */
3205 count1
= SPECPDL_INDEX ();
3208 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3217 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3224 #ifdef DATAGRAM_SOCKETS
3225 if (!is_server
&& socktype
== SOCK_DGRAM
)
3227 #endif /* DATAGRAM_SOCKETS */
3229 #ifdef NON_BLOCKING_CONNECT
3230 if (is_non_blocking_client
)
3233 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3235 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3247 /* Make us close S if quit. */
3248 record_unwind_protect (close_file_unwind
, make_number (s
));
3250 /* Parse network options in the arg list.
3251 We simply ignore anything which isn't a known option (including other keywords).
3252 An error is signaled if setting a known option fails. */
3253 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3254 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3258 /* Configure as a server socket. */
3260 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3261 explicit :reuseaddr key to override this. */
3262 #ifdef HAVE_LOCAL_SOCKETS
3263 if (family
!= AF_LOCAL
)
3265 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3268 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3269 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3272 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3273 report_file_error ("Cannot bind server socket", Qnil
);
3275 #ifdef HAVE_GETSOCKNAME
3276 if (EQ (service
, Qt
))
3278 struct sockaddr_in sa1
;
3279 socklen_t len1
= sizeof (sa1
);
3280 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3282 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3283 service
= make_number (ntohs (sa1
.sin_port
));
3284 contact
= Fplist_put (contact
, QCservice
, service
);
3289 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3290 report_file_error ("Cannot listen on server socket", Qnil
);
3298 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3301 if (ret
== 0 || xerrno
== EISCONN
)
3303 /* The unwind-protect will be discarded afterwards.
3304 Likewise for immediate_quit. */
3308 #ifdef NON_BLOCKING_CONNECT
3310 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3314 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3321 if (xerrno
== EINTR
)
3323 /* Unlike most other syscalls connect() cannot be called
3324 again. (That would return EALREADY.) The proper way to
3325 wait for completion is pselect(). */
3333 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3339 report_file_error ("select failed", Qnil
);
3343 len
= sizeof xerrno
;
3344 eassert (FD_ISSET (s
, &fdset
));
3345 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3346 report_file_error ("getsockopt failed", Qnil
);
3348 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3352 #endif /* !WINDOWSNT */
3356 /* Discard the unwind protect closing S. */
3357 specpdl_ptr
= specpdl
+ count1
;
3362 if (xerrno
== EINTR
)
3369 #ifdef DATAGRAM_SOCKETS
3370 if (socktype
== SOCK_DGRAM
)
3372 if (datagram_address
[s
].sa
)
3374 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3375 datagram_address
[s
].len
= lres
->ai_addrlen
;
3379 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3380 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3383 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3384 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3385 conv_lisp_to_sockaddr (rfamily
, remote
,
3386 datagram_address
[s
].sa
, rlen
);
3390 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3393 contact
= Fplist_put (contact
, QCaddress
,
3394 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3395 #ifdef HAVE_GETSOCKNAME
3398 struct sockaddr_in sa1
;
3399 socklen_t len1
= sizeof (sa1
);
3400 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3401 contact
= Fplist_put (contact
, QClocal
,
3402 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3409 #ifdef HAVE_GETADDRINFO
3418 /* Discard the unwind protect for closing S, if any. */
3419 specpdl_ptr
= specpdl
+ count1
;
3421 /* Unwind bind_polling_period and request_sigio. */
3422 unbind_to (count
, Qnil
);
3426 /* If non-blocking got this far - and failed - assume non-blocking is
3427 not supported after all. This is probably a wrong assumption, but
3428 the normal blocking calls to open-network-stream handles this error
3430 if (is_non_blocking_client
)
3435 report_file_error ("make server process failed", contact
);
3437 report_file_error ("make client process failed", contact
);
3444 buffer
= Fget_buffer_create (buffer
);
3445 proc
= make_process (name
);
3447 chan_process
[inch
] = proc
;
3450 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3453 fcntl (inch
, F_SETFL
, O_NDELAY
);
3457 p
= XPROCESS (proc
);
3459 pset_childp (p
, contact
);
3460 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3461 pset_type (p
, Qnetwork
);
3463 pset_buffer (p
, buffer
);
3464 pset_sentinel (p
, sentinel
);
3465 pset_filter (p
, filter
);
3466 pset_log (p
, Fplist_get (contact
, QClog
));
3467 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3468 p
->kill_without_query
= 1;
3469 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3470 pset_command (p
, Qt
);
3474 if (is_server
&& socktype
!= SOCK_DGRAM
)
3475 pset_status (p
, Qlisten
);
3477 /* Make the process marker point into the process buffer (if any). */
3478 if (BUFFERP (buffer
))
3479 set_marker_both (p
->mark
, buffer
,
3480 BUF_ZV (XBUFFER (buffer
)),
3481 BUF_ZV_BYTE (XBUFFER (buffer
)));
3483 #ifdef NON_BLOCKING_CONNECT
3484 if (is_non_blocking_client
)
3486 /* We may get here if connect did succeed immediately. However,
3487 in that case, we still need to signal this like a non-blocking
3489 pset_status (p
, Qconnect
);
3490 if (!FD_ISSET (inch
, &connect_wait_mask
))
3492 FD_SET (inch
, &connect_wait_mask
);
3493 FD_SET (inch
, &write_mask
);
3494 num_pending_connects
++;
3499 /* A server may have a client filter setting of Qt, but it must
3500 still listen for incoming connects unless it is stopped. */
3501 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3502 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3504 FD_SET (inch
, &input_wait_mask
);
3505 FD_SET (inch
, &non_keyboard_wait_mask
);
3508 if (inch
> max_process_desc
)
3509 max_process_desc
= inch
;
3511 tem
= Fplist_member (contact
, QCcoding
);
3512 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3513 tem
= Qnil
; /* No error message (too late!). */
3516 /* Setup coding systems for communicating with the network stream. */
3517 struct gcpro gcpro1
;
3518 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3519 Lisp_Object coding_systems
= Qt
;
3520 Lisp_Object fargs
[5], val
;
3524 val
= XCAR (XCDR (tem
));
3528 else if (!NILP (Vcoding_system_for_read
))
3529 val
= Vcoding_system_for_read
;
3530 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3531 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3532 /* We dare not decode end-of-line format by setting VAL to
3533 Qraw_text, because the existing Emacs Lisp libraries
3534 assume that they receive bare code including a sequence of
3539 if (NILP (host
) || NILP (service
))
3540 coding_systems
= Qnil
;
3543 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3544 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3546 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3549 if (CONSP (coding_systems
))
3550 val
= XCAR (coding_systems
);
3551 else if (CONSP (Vdefault_process_coding_system
))
3552 val
= XCAR (Vdefault_process_coding_system
);
3556 pset_decode_coding_system (p
, val
);
3560 val
= XCAR (XCDR (tem
));
3564 else if (!NILP (Vcoding_system_for_write
))
3565 val
= Vcoding_system_for_write
;
3566 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3570 if (EQ (coding_systems
, Qt
))
3572 if (NILP (host
) || NILP (service
))
3573 coding_systems
= Qnil
;
3576 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3577 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3579 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3583 if (CONSP (coding_systems
))
3584 val
= XCDR (coding_systems
);
3585 else if (CONSP (Vdefault_process_coding_system
))
3586 val
= XCDR (Vdefault_process_coding_system
);
3590 pset_encode_coding_system (p
, val
);
3592 setup_process_coding_systems (proc
);
3594 pset_decoding_buf (p
, empty_unibyte_string
);
3595 p
->decoding_carryover
= 0;
3596 pset_encoding_buf (p
, empty_unibyte_string
);
3598 p
->inherit_coding_system_flag
3599 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3606 #if defined (HAVE_NET_IF_H)
3609 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3610 doc
: /* Return an alist of all network interfaces and their network address.
3611 Each element is a cons, the car of which is a string containing the
3612 interface name, and the cdr is the network address in internal
3613 format; see the description of ADDRESS in `make-network-process'. */)
3616 struct ifconf ifconf
;
3617 struct ifreq
*ifreq
;
3619 ptrdiff_t buf_size
= 512;
3623 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3629 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3630 ifconf
.ifc_buf
= buf
;
3631 ifconf
.ifc_len
= buf_size
;
3632 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3639 while (ifconf
.ifc_len
== buf_size
);
3644 ifreq
= ifconf
.ifc_req
;
3645 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3647 struct ifreq
*ifq
= ifreq
;
3648 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3649 #define SIZEOF_IFREQ(sif) \
3650 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3651 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3653 int len
= SIZEOF_IFREQ (ifq
);
3655 int len
= sizeof (*ifreq
);
3657 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3659 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3661 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3664 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3665 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3666 res
= Fcons (Fcons (build_string (namebuf
),
3667 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3668 sizeof (struct sockaddr
))),
3675 #endif /* SIOCGIFCONF */
3677 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3681 const char *flag_sym
;
3684 static const struct ifflag_def ifflag_table
[] = {
3688 #ifdef IFF_BROADCAST
3689 { IFF_BROADCAST
, "broadcast" },
3692 { IFF_DEBUG
, "debug" },
3695 { IFF_LOOPBACK
, "loopback" },
3697 #ifdef IFF_POINTOPOINT
3698 { IFF_POINTOPOINT
, "pointopoint" },
3701 { IFF_RUNNING
, "running" },
3704 { IFF_NOARP
, "noarp" },
3707 { IFF_PROMISC
, "promisc" },
3709 #ifdef IFF_NOTRAILERS
3710 #ifdef NS_IMPL_COCOA
3711 /* Really means smart, notrailers is obsolete */
3712 { IFF_NOTRAILERS
, "smart" },
3714 { IFF_NOTRAILERS
, "notrailers" },
3718 { IFF_ALLMULTI
, "allmulti" },
3721 { IFF_MASTER
, "master" },
3724 { IFF_SLAVE
, "slave" },
3726 #ifdef IFF_MULTICAST
3727 { IFF_MULTICAST
, "multicast" },
3730 { IFF_PORTSEL
, "portsel" },
3732 #ifdef IFF_AUTOMEDIA
3733 { IFF_AUTOMEDIA
, "automedia" },
3736 { IFF_DYNAMIC
, "dynamic" },
3739 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3742 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3745 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3748 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3751 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3756 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3757 doc
: /* Return information about network interface named IFNAME.
3758 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3759 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3760 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3761 FLAGS is the current flags of the interface. */)
3762 (Lisp_Object ifname
)
3765 Lisp_Object res
= Qnil
;
3769 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3770 && defined HAVE_GETIFADDRS && defined LLADDR)
3771 struct ifaddrs
*ifap
;
3774 CHECK_STRING (ifname
);
3776 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3777 error ("interface name too long");
3778 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3780 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3785 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3786 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3788 int flags
= rq
.ifr_flags
;
3789 const struct ifflag_def
*fp
;
3792 /* If flags is smaller than int (i.e. short) it may have the high bit set
3793 due to IFF_MULTICAST. In that case, sign extending it into
3795 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3796 flags
= (unsigned short) rq
.ifr_flags
;
3799 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3801 if (flags
& fp
->flag_bit
)
3803 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3804 flags
-= fp
->flag_bit
;
3807 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3811 elt
= Fcons (make_number (fnum
), elt
);
3816 res
= Fcons (elt
, res
);
3819 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3820 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3822 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3823 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3827 for (n
= 0; n
< 6; n
++)
3828 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3829 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3831 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3832 if (getifaddrs (&ifap
) != -1)
3834 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3835 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3838 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3840 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3841 unsigned char linkaddr
[6];
3844 if (it
->ifa_addr
->sa_family
!= AF_LINK
3845 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3846 || sdl
->sdl_alen
!= 6)
3849 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3850 for (n
= 0; n
< 6; n
++)
3851 p
->contents
[n
] = make_number (linkaddr
[n
]);
3853 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3857 #ifdef HAVE_FREEIFADDRS
3861 #endif /* HAVE_GETIFADDRS && LLADDR */
3863 res
= Fcons (elt
, res
);
3866 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3867 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3870 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3871 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3873 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3877 res
= Fcons (elt
, res
);
3880 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3881 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3884 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3887 res
= Fcons (elt
, res
);
3890 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3891 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3894 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3897 res
= Fcons (elt
, res
);
3901 return any
? res
: Qnil
;
3904 #endif /* defined (HAVE_NET_IF_H) */
3906 /* Turn off input and output for process PROC. */
3909 deactivate_process (Lisp_Object proc
)
3911 register int inchannel
, outchannel
;
3912 register struct Lisp_Process
*p
= XPROCESS (proc
);
3915 /* Delete GnuTLS structures in PROC, if any. */
3916 emacs_gnutls_deinit (proc
);
3917 #endif /* HAVE_GNUTLS */
3919 inchannel
= p
->infd
;
3920 outchannel
= p
->outfd
;
3922 #ifdef ADAPTIVE_READ_BUFFERING
3923 if (p
->read_output_delay
> 0)
3925 if (--process_output_delay_count
< 0)
3926 process_output_delay_count
= 0;
3927 p
->read_output_delay
= 0;
3928 p
->read_output_skip
= 0;
3934 /* Beware SIGCHLD hereabouts. */
3935 flush_pending_output (inchannel
);
3936 emacs_close (inchannel
);
3937 if (outchannel
>= 0 && outchannel
!= inchannel
)
3938 emacs_close (outchannel
);
3942 #ifdef DATAGRAM_SOCKETS
3943 if (DATAGRAM_CHAN_P (inchannel
))
3945 xfree (datagram_address
[inchannel
].sa
);
3946 datagram_address
[inchannel
].sa
= 0;
3947 datagram_address
[inchannel
].len
= 0;
3950 chan_process
[inchannel
] = Qnil
;
3951 FD_CLR (inchannel
, &input_wait_mask
);
3952 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3953 #ifdef NON_BLOCKING_CONNECT
3954 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3956 FD_CLR (inchannel
, &connect_wait_mask
);
3957 FD_CLR (inchannel
, &write_mask
);
3958 if (--num_pending_connects
< 0)
3962 if (inchannel
== max_process_desc
)
3965 /* We just closed the highest-numbered process input descriptor,
3966 so recompute the highest-numbered one now. */
3967 max_process_desc
= 0;
3968 for (i
= 0; i
< MAXDESC
; i
++)
3969 if (!NILP (chan_process
[i
]))
3970 max_process_desc
= i
;
3976 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3978 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3979 It is read into the process' buffers or given to their filter functions.
3980 Non-nil arg PROCESS means do not return until some output has been received
3983 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3984 and milliseconds to wait; return after that much time whether or not
3985 there is any subprocess output. If SECONDS is a floating point number,
3986 it specifies a fractional number of seconds to wait.
3987 The MILLISEC argument is obsolete and should be avoided.
3989 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3990 from PROCESS, suspending reading output from other processes.
3991 If JUST-THIS-ONE is an integer, don't run any timers either.
3992 Return non-nil if we received any output before the timeout expired. */)
3993 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3998 if (! NILP (process
))
3999 CHECK_PROCESS (process
);
4001 just_this_one
= Qnil
;
4003 if (!NILP (millisec
))
4004 { /* Obsolete calling convention using integers rather than floats. */
4005 CHECK_NUMBER (millisec
);
4007 seconds
= make_float (XINT (millisec
) / 1000.0);
4010 CHECK_NUMBER (seconds
);
4011 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4018 if (!NILP (seconds
))
4020 if (INTEGERP (seconds
))
4022 if (0 < XINT (seconds
))
4024 secs
= XINT (seconds
);
4028 else if (FLOATP (seconds
))
4030 if (0 < XFLOAT_DATA (seconds
))
4032 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4033 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
4034 nsecs
= EMACS_NSECS (t
);
4038 wrong_type_argument (Qnumberp
, seconds
);
4040 else if (! NILP (process
))
4044 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4046 !NILP (process
) ? XPROCESS (process
) : NULL
,
4047 NILP (just_this_one
) ? 0 :
4048 !INTEGERP (just_this_one
) ? 1 : -1)
4052 /* Accept a connection for server process SERVER on CHANNEL. */
4054 static int connect_counter
= 0;
4057 server_accept_connection (Lisp_Object server
, int channel
)
4059 Lisp_Object proc
, caller
, name
, buffer
;
4060 Lisp_Object contact
, host
, service
;
4061 struct Lisp_Process
*ps
= XPROCESS (server
);
4062 struct Lisp_Process
*p
;
4066 struct sockaddr_in in
;
4068 struct sockaddr_in6 in6
;
4070 #ifdef HAVE_LOCAL_SOCKETS
4071 struct sockaddr_un un
;
4074 socklen_t len
= sizeof saddr
;
4076 s
= accept (channel
, &saddr
.sa
, &len
);
4085 if (code
== EWOULDBLOCK
)
4089 if (!NILP (ps
->log
))
4090 call3 (ps
->log
, server
, Qnil
,
4091 concat3 (build_string ("accept failed with code"),
4092 Fnumber_to_string (make_number (code
)),
4093 build_string ("\n")));
4099 /* Setup a new process to handle the connection. */
4101 /* Generate a unique identification of the caller, and build contact
4102 information for this process. */
4105 switch (saddr
.sa
.sa_family
)
4109 Lisp_Object args
[5];
4110 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4111 args
[0] = build_string ("%d.%d.%d.%d");
4112 args
[1] = make_number (*ip
++);
4113 args
[2] = make_number (*ip
++);
4114 args
[3] = make_number (*ip
++);
4115 args
[4] = make_number (*ip
++);
4116 host
= Fformat (5, args
);
4117 service
= make_number (ntohs (saddr
.in
.sin_port
));
4119 args
[0] = build_string (" <%s:%d>");
4122 caller
= Fformat (3, args
);
4129 Lisp_Object args
[9];
4130 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4132 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4133 for (i
= 0; i
< 8; i
++)
4134 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4135 host
= Fformat (9, args
);
4136 service
= make_number (ntohs (saddr
.in
.sin_port
));
4138 args
[0] = build_string (" <[%s]:%d>");
4141 caller
= Fformat (3, args
);
4146 #ifdef HAVE_LOCAL_SOCKETS
4150 caller
= Fnumber_to_string (make_number (connect_counter
));
4151 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4155 /* Create a new buffer name for this process if it doesn't have a
4156 filter. The new buffer name is based on the buffer name or
4157 process name of the server process concatenated with the caller
4160 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4164 buffer
= ps
->buffer
;
4166 buffer
= Fbuffer_name (buffer
);
4171 buffer
= concat2 (buffer
, caller
);
4172 buffer
= Fget_buffer_create (buffer
);
4176 /* Generate a unique name for the new server process. Combine the
4177 server process name with the caller identification. */
4179 name
= concat2 (ps
->name
, caller
);
4180 proc
= make_process (name
);
4182 chan_process
[s
] = proc
;
4185 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4188 fcntl (s
, F_SETFL
, O_NDELAY
);
4192 p
= XPROCESS (proc
);
4194 /* Build new contact information for this setup. */
4195 contact
= Fcopy_sequence (ps
->childp
);
4196 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4197 contact
= Fplist_put (contact
, QChost
, host
);
4198 if (!NILP (service
))
4199 contact
= Fplist_put (contact
, QCservice
, service
);
4200 contact
= Fplist_put (contact
, QCremote
,
4201 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4202 #ifdef HAVE_GETSOCKNAME
4204 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4205 contact
= Fplist_put (contact
, QClocal
,
4206 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4209 pset_childp (p
, contact
);
4210 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4211 pset_type (p
, Qnetwork
);
4213 pset_buffer (p
, buffer
);
4214 pset_sentinel (p
, ps
->sentinel
);
4215 pset_filter (p
, ps
->filter
);
4216 pset_command (p
, Qnil
);
4220 pset_status (p
, Qrun
);
4222 /* Client processes for accepted connections are not stopped initially. */
4223 if (!EQ (p
->filter
, Qt
))
4225 FD_SET (s
, &input_wait_mask
);
4226 FD_SET (s
, &non_keyboard_wait_mask
);
4229 if (s
> max_process_desc
)
4230 max_process_desc
= s
;
4232 /* Setup coding system for new process based on server process.
4233 This seems to be the proper thing to do, as the coding system
4234 of the new process should reflect the settings at the time the
4235 server socket was opened; not the current settings. */
4237 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4238 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4239 setup_process_coding_systems (proc
);
4241 pset_decoding_buf (p
, empty_unibyte_string
);
4242 p
->decoding_carryover
= 0;
4243 pset_encoding_buf (p
, empty_unibyte_string
);
4245 p
->inherit_coding_system_flag
4246 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4248 if (!NILP (ps
->log
))
4249 call3 (ps
->log
, server
, proc
,
4250 concat3 (build_string ("accept from "),
4251 (STRINGP (host
) ? host
: build_string ("-")),
4252 build_string ("\n")));
4254 if (!NILP (p
->sentinel
))
4255 exec_sentinel (proc
,
4256 concat3 (build_string ("open from "),
4257 (STRINGP (host
) ? host
: build_string ("-")),
4258 build_string ("\n")));
4261 /* This variable is different from waiting_for_input in keyboard.c.
4262 It is used to communicate to a lisp process-filter/sentinel (via the
4263 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4264 for user-input when that process-filter was called.
4265 waiting_for_input cannot be used as that is by definition 0 when
4266 lisp code is being evalled.
4267 This is also used in record_asynch_buffer_change.
4268 For that purpose, this must be 0
4269 when not inside wait_reading_process_output. */
4270 static int waiting_for_user_input_p
;
4273 wait_reading_process_output_unwind (Lisp_Object data
)
4275 waiting_for_user_input_p
= XINT (data
);
4279 /* This is here so breakpoints can be put on it. */
4281 wait_reading_process_output_1 (void)
4285 /* Read and dispose of subprocess output while waiting for timeout to
4286 elapse and/or keyboard input to be available.
4290 If negative, gobble data immediately available but don't wait for any.
4293 an additional duration to wait, measured in nanoseconds
4294 If TIME_LIMIT is zero, then:
4295 If NSECS == 0, there is no limit.
4296 If NSECS > 0, the timeout consists of NSECS only.
4297 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4300 0 to ignore keyboard input, or
4301 1 to return when input is available, or
4302 -1 meaning caller will actually read the input, so don't throw to
4303 the quit handler, or
4305 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4306 output that arrives.
4308 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4309 (and gobble terminal input into the buffer if any arrives).
4311 If WAIT_PROC is specified, wait until something arrives from that
4312 process. The return value is true if we read some input from
4315 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4316 (suspending output from other processes). A negative value
4317 means don't run any timers either.
4319 If WAIT_PROC is specified, then the function returns true if we
4320 received input from that process before the timeout elapsed.
4321 Otherwise, return true if we received input from any process. */
4324 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4326 Lisp_Object wait_for_cell
,
4327 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4329 register int channel
, nfds
;
4330 SELECT_TYPE Available
;
4331 SELECT_TYPE Writeok
;
4333 int check_delay
, no_avail
;
4336 EMACS_TIME timeout
, end_time
;
4337 int wait_channel
= -1;
4338 int got_some_input
= 0;
4339 ptrdiff_t count
= SPECPDL_INDEX ();
4341 FD_ZERO (&Available
);
4344 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4345 && !(CONSP (wait_proc
->status
)
4346 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4347 message ("Blocking call to accept-process-output with quit inhibited!!");
4349 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4350 if (wait_proc
!= NULL
)
4351 wait_channel
= wait_proc
->infd
;
4353 record_unwind_protect (wait_reading_process_output_unwind
,
4354 make_number (waiting_for_user_input_p
));
4355 waiting_for_user_input_p
= read_kbd
;
4362 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4363 time_limit
= TYPE_MAXIMUM (time_t);
4365 /* Since we may need to wait several times,
4366 compute the absolute time to return at. */
4367 if (time_limit
|| 0 < nsecs
)
4369 timeout
= make_emacs_time (time_limit
, nsecs
);
4370 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4375 int timeout_reduced_for_timers
= 0;
4377 /* If calling from keyboard input, do not quit
4378 since we want to return C-g as an input character.
4379 Otherwise, do pending quit if requested. */
4382 else if (pending_signals
)
4383 process_pending_signals ();
4385 /* Exit now if the cell we're waiting for became non-nil. */
4386 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4389 /* Compute time from now till when time limit is up */
4390 /* Exit if already run out */
4393 /* A negative timeout means
4394 gobble output available now
4395 but don't wait at all. */
4397 timeout
= make_emacs_time (0, 0);
4399 else if (time_limit
|| 0 < nsecs
)
4401 EMACS_TIME now
= current_emacs_time ();
4402 if (EMACS_TIME_LE (end_time
, now
))
4404 timeout
= sub_emacs_time (end_time
, now
);
4408 timeout
= make_emacs_time (100000, 0);
4411 /* Normally we run timers here.
4412 But not if wait_for_cell; in those cases,
4413 the wait is supposed to be short,
4414 and those callers cannot handle running arbitrary Lisp code here. */
4415 if (NILP (wait_for_cell
)
4416 && just_wait_proc
>= 0)
4418 EMACS_TIME timer_delay
;
4422 int old_timers_run
= timers_run
;
4423 struct buffer
*old_buffer
= current_buffer
;
4424 Lisp_Object old_window
= selected_window
;
4426 timer_delay
= timer_check ();
4428 /* If a timer has run, this might have changed buffers
4429 an alike. Make read_key_sequence aware of that. */
4430 if (timers_run
!= old_timers_run
4431 && (old_buffer
!= current_buffer
4432 || !EQ (old_window
, selected_window
))
4433 && waiting_for_user_input_p
== -1)
4434 record_asynch_buffer_change ();
4436 if (timers_run
!= old_timers_run
&& do_display
)
4437 /* We must retry, since a timer may have requeued itself
4438 and that could alter the time_delay. */
4439 redisplay_preserve_echo_area (9);
4443 while (!detect_input_pending ());
4445 /* If there is unread keyboard input, also return. */
4447 && requeued_events_pending_p ())
4450 /* A negative timeout means do not wait at all. */
4453 if (EMACS_TIME_VALID_P (timer_delay
))
4455 if (EMACS_TIME_LT (timer_delay
, timeout
))
4457 timeout
= timer_delay
;
4458 timeout_reduced_for_timers
= 1;
4463 /* This is so a breakpoint can be put here. */
4464 wait_reading_process_output_1 ();
4469 /* Cause C-g and alarm signals to take immediate action,
4470 and cause input available signals to zero out timeout.
4472 It is important that we do this before checking for process
4473 activity. If we get a SIGCHLD after the explicit checks for
4474 process activity, timeout is the only way we will know. */
4476 set_waiting_for_input (&timeout
);
4478 /* If status of something has changed, and no input is
4479 available, notify the user of the change right away. After
4480 this explicit check, we'll let the SIGCHLD handler zap
4481 timeout to get our attention. */
4482 if (update_tick
!= process_tick
)
4487 if (kbd_on_hold_p ())
4490 Atemp
= input_wait_mask
;
4493 timeout
= make_emacs_time (0, 0);
4494 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4496 #ifdef NON_BLOCKING_CONNECT
4497 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4501 NULL
, &timeout
, NULL
)
4504 /* It's okay for us to do this and then continue with
4505 the loop, since timeout has already been zeroed out. */
4506 clear_waiting_for_input ();
4507 status_notify (NULL
);
4508 if (do_display
) redisplay_preserve_echo_area (13);
4512 /* Don't wait for output from a non-running process. Just
4513 read whatever data has already been received. */
4514 if (wait_proc
&& wait_proc
->raw_status_new
)
4515 update_status (wait_proc
);
4517 && ! EQ (wait_proc
->status
, Qrun
)
4518 && ! EQ (wait_proc
->status
, Qconnect
))
4520 int nread
, total_nread
= 0;
4522 clear_waiting_for_input ();
4523 XSETPROCESS (proc
, wait_proc
);
4525 /* Read data from the process, until we exhaust it. */
4526 while (wait_proc
->infd
>= 0)
4528 nread
= read_process_output (proc
, wait_proc
->infd
);
4535 total_nread
+= nread
;
4539 else if (nread
== -1 && EIO
== errno
)
4543 else if (nread
== -1 && EAGAIN
== errno
)
4547 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4551 if (total_nread
> 0 && do_display
)
4552 redisplay_preserve_echo_area (10);
4557 /* Wait till there is something to do */
4559 if (wait_proc
&& just_wait_proc
)
4561 if (wait_proc
->infd
< 0) /* Terminated */
4563 FD_SET (wait_proc
->infd
, &Available
);
4567 else if (!NILP (wait_for_cell
))
4569 Available
= non_process_wait_mask
;
4576 Available
= non_keyboard_wait_mask
;
4578 Available
= input_wait_mask
;
4579 Writeok
= write_mask
;
4580 #ifdef SELECT_CANT_DO_WRITE_MASK
4585 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4588 /* If frame size has changed or the window is newly mapped,
4589 redisplay now, before we start to wait. There is a race
4590 condition here; if a SIGIO arrives between now and the select
4591 and indicates that a frame is trashed, the select may block
4592 displaying a trashed screen. */
4593 if (frame_garbaged
&& do_display
)
4595 clear_waiting_for_input ();
4596 redisplay_preserve_echo_area (11);
4598 set_waiting_for_input (&timeout
);
4601 /* Skip the `select' call if input is available and we're
4602 waiting for keyboard input or a cell change (which can be
4603 triggered by processing X events). In the latter case, set
4604 nfds to 1 to avoid breaking the loop. */
4606 if ((read_kbd
|| !NILP (wait_for_cell
))
4607 && detect_input_pending ())
4609 nfds
= read_kbd
? 0 : 1;
4616 #ifdef ADAPTIVE_READ_BUFFERING
4617 /* Set the timeout for adaptive read buffering if any
4618 process has non-zero read_output_skip and non-zero
4619 read_output_delay, and we are not reading output for a
4620 specific wait_channel. It is not executed if
4621 Vprocess_adaptive_read_buffering is nil. */
4622 if (process_output_skip
&& check_delay
> 0)
4624 int nsecs
= EMACS_NSECS (timeout
);
4625 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4626 nsecs
= READ_OUTPUT_DELAY_MAX
;
4627 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4629 proc
= chan_process
[channel
];
4632 /* Find minimum non-zero read_output_delay among the
4633 processes with non-zero read_output_skip. */
4634 if (XPROCESS (proc
)->read_output_delay
> 0)
4637 if (!XPROCESS (proc
)->read_output_skip
)
4639 FD_CLR (channel
, &Available
);
4640 XPROCESS (proc
)->read_output_skip
= 0;
4641 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4642 nsecs
= XPROCESS (proc
)->read_output_delay
;
4645 timeout
= make_emacs_time (0, nsecs
);
4646 process_output_skip
= 0;
4649 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4651 #elif defined (HAVE_NS)
4656 (max (max_process_desc
, max_input_desc
) + 1,
4658 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4659 NULL
, &timeout
, NULL
);
4662 /* GnuTLS buffers data internally. In lowat mode it leaves
4663 some data in the TCP buffers so that select works, but
4664 with custom pull/push functions we need to check if some
4665 data is available in the buffers manually. */
4670 /* We're not waiting on a specific process, so loop
4671 through all the channels and check for data.
4672 This is a workaround needed for some versions of
4673 the gnutls library -- 2.12.14 has been confirmed
4675 http://comments.gmane.org/gmane.emacs.devel/145074 */
4676 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4677 if (! NILP (chan_process
[channel
]))
4679 struct Lisp_Process
*p
=
4680 XPROCESS (chan_process
[channel
]);
4681 if (p
&& p
->gnutls_p
&& p
->infd
4682 && ((emacs_gnutls_record_check_pending
4687 FD_SET (p
->infd
, &Available
);
4693 /* Check this specific channel. */
4694 if (wait_proc
->gnutls_p
/* Check for valid process. */
4695 /* Do we have pending data? */
4696 && ((emacs_gnutls_record_check_pending
4697 (wait_proc
->gnutls_state
))
4701 /* Set to Available. */
4702 FD_SET (wait_proc
->infd
, &Available
);
4711 /* Make C-g and alarm signals set flags again */
4712 clear_waiting_for_input ();
4714 /* If we woke up due to SIGWINCH, actually change size now. */
4715 do_pending_window_change (0);
4717 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4718 /* We waited the full specified time, so return now. */
4722 if (xerrno
== EINTR
)
4724 else if (xerrno
== EBADF
)
4727 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4728 the child's closure of the pts gives the parent a SIGHUP, and
4729 the ptc file descriptor is automatically closed,
4730 yielding EBADF here or at select() call above.
4731 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4732 in m/ibmrt-aix.h), and here we just ignore the select error.
4733 Cleanup occurs c/o status_notify after SIGCLD. */
4734 no_avail
= 1; /* Cannot depend on values returned */
4740 error ("select error: %s", emacs_strerror (xerrno
));
4745 FD_ZERO (&Available
);
4749 /* Check for keyboard input */
4750 /* If there is any, return immediately
4751 to give it higher priority than subprocesses */
4755 int old_timers_run
= timers_run
;
4756 struct buffer
*old_buffer
= current_buffer
;
4757 Lisp_Object old_window
= selected_window
;
4760 if (detect_input_pending_run_timers (do_display
))
4762 swallow_events (do_display
);
4763 if (detect_input_pending_run_timers (do_display
))
4767 /* If a timer has run, this might have changed buffers
4768 an alike. Make read_key_sequence aware of that. */
4769 if (timers_run
!= old_timers_run
4770 && waiting_for_user_input_p
== -1
4771 && (old_buffer
!= current_buffer
4772 || !EQ (old_window
, selected_window
)))
4773 record_asynch_buffer_change ();
4779 /* If there is unread keyboard input, also return. */
4781 && requeued_events_pending_p ())
4784 /* If we are not checking for keyboard input now,
4785 do process events (but don't run any timers).
4786 This is so that X events will be processed.
4787 Otherwise they may have to wait until polling takes place.
4788 That would causes delays in pasting selections, for example.
4790 (We used to do this only if wait_for_cell.) */
4791 if (read_kbd
== 0 && detect_input_pending ())
4793 swallow_events (do_display
);
4794 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4795 if (detect_input_pending ())
4800 /* Exit now if the cell we're waiting for became non-nil. */
4801 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4805 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4806 go read it. This can happen with X on BSD after logging out.
4807 In that case, there really is no input and no SIGIO,
4808 but select says there is input. */
4810 if (read_kbd
&& interrupt_input
4811 && keyboard_bit_set (&Available
) && ! noninteractive
)
4812 handle_input_available_signal (SIGIO
);
4816 got_some_input
|= nfds
> 0;
4818 /* If checking input just got us a size-change event from X,
4819 obey it now if we should. */
4820 if (read_kbd
|| ! NILP (wait_for_cell
))
4821 do_pending_window_change (0);
4823 /* Check for data from a process. */
4824 if (no_avail
|| nfds
== 0)
4827 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4829 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4831 && ((d
->condition
& FOR_READ
4832 && FD_ISSET (channel
, &Available
))
4833 || (d
->condition
& FOR_WRITE
4834 && FD_ISSET (channel
, &write_mask
))))
4835 d
->func (channel
, d
->data
);
4838 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4840 if (FD_ISSET (channel
, &Available
)
4841 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4842 && !FD_ISSET (channel
, &non_process_wait_mask
))
4846 /* If waiting for this channel, arrange to return as
4847 soon as no more input to be processed. No more
4849 if (wait_channel
== channel
)
4855 proc
= chan_process
[channel
];
4859 /* If this is a server stream socket, accept connection. */
4860 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4862 server_accept_connection (proc
, channel
);
4866 /* Read data from the process, starting with our
4867 buffered-ahead character if we have one. */
4869 nread
= read_process_output (proc
, channel
);
4872 /* Since read_process_output can run a filter,
4873 which can call accept-process-output,
4874 don't try to read from any other processes
4875 before doing the select again. */
4876 FD_ZERO (&Available
);
4879 redisplay_preserve_echo_area (12);
4882 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4885 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4886 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4888 else if (nread
== -1 && errno
== EAGAIN
)
4892 else if (nread
== -1 && errno
== EAGAIN
)
4894 /* Note that we cannot distinguish between no input
4895 available now and a closed pipe.
4896 With luck, a closed pipe will be accompanied by
4897 subprocess termination and SIGCHLD. */
4898 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4900 #endif /* O_NDELAY */
4901 #endif /* O_NONBLOCK */
4903 /* On some OSs with ptys, when the process on one end of
4904 a pty exits, the other end gets an error reading with
4905 errno = EIO instead of getting an EOF (0 bytes read).
4906 Therefore, if we get an error reading and errno =
4907 EIO, just continue, because the child process has
4908 exited and should clean itself up soon (e.g. when we
4911 However, it has been known to happen that the SIGCHLD
4912 got lost. So raise the signal again just in case.
4914 else if (nread
== -1 && errno
== EIO
)
4916 struct Lisp_Process
*p
= XPROCESS (proc
);
4918 /* Clear the descriptor now, so we only raise the
4920 FD_CLR (channel
, &input_wait_mask
);
4921 FD_CLR (channel
, &non_keyboard_wait_mask
);
4925 /* If the EIO occurs on a pty, the SIGCHLD handler's
4926 waitpid call will not find the process object to
4927 delete. Do it here. */
4928 p
->tick
= ++process_tick
;
4929 pset_status (p
, Qfailed
);
4932 handle_child_signal (SIGCHLD
);
4934 #endif /* HAVE_PTYS */
4935 /* If we can detect process termination, don't consider the
4936 process gone just because its pipe is closed. */
4938 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4943 /* Preserve status of processes already terminated. */
4944 XPROCESS (proc
)->tick
= ++process_tick
;
4945 deactivate_process (proc
);
4946 if (XPROCESS (proc
)->raw_status_new
)
4947 update_status (XPROCESS (proc
));
4948 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4949 pset_status (XPROCESS (proc
),
4950 list2 (Qexit
, make_number (256)));
4953 #ifdef NON_BLOCKING_CONNECT
4954 if (FD_ISSET (channel
, &Writeok
)
4955 && FD_ISSET (channel
, &connect_wait_mask
))
4957 struct Lisp_Process
*p
;
4959 FD_CLR (channel
, &connect_wait_mask
);
4960 FD_CLR (channel
, &write_mask
);
4961 if (--num_pending_connects
< 0)
4964 proc
= chan_process
[channel
];
4968 p
= XPROCESS (proc
);
4971 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4972 So only use it on systems where it is known to work. */
4974 socklen_t xlen
= sizeof (xerrno
);
4975 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4980 struct sockaddr pname
;
4981 int pnamelen
= sizeof (pname
);
4983 /* If connection failed, getpeername will fail. */
4985 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4987 /* Obtain connect failure code through error slippage. */
4990 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4997 p
->tick
= ++process_tick
;
4998 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
4999 deactivate_process (proc
);
5003 pset_status (p
, Qrun
);
5004 /* Execute the sentinel here. If we had relied on
5005 status_notify to do it later, it will read input
5006 from the process before calling the sentinel. */
5007 exec_sentinel (proc
, build_string ("open\n"));
5008 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5010 FD_SET (p
->infd
, &input_wait_mask
);
5011 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5015 #endif /* NON_BLOCKING_CONNECT */
5016 } /* end for each file descriptor */
5017 } /* end while exit conditions not met */
5019 unbind_to (count
, Qnil
);
5021 /* If calling from keyboard input, do not quit
5022 since we want to return C-g as an input character.
5023 Otherwise, do pending quit if requested. */
5026 /* Prevent input_pending from remaining set if we quit. */
5027 clear_input_pending ();
5031 return got_some_input
;
5034 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5037 read_process_output_call (Lisp_Object fun_and_args
)
5039 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5043 read_process_output_error_handler (Lisp_Object error_val
)
5045 cmd_error_internal (error_val
, "error in process filter: ");
5047 update_echo_area ();
5048 Fsleep_for (make_number (2), Qnil
);
5052 /* Read pending output from the process channel,
5053 starting with our buffered-ahead character if we have one.
5054 Yield number of decoded characters read.
5056 This function reads at most 4096 characters.
5057 If you want to read all available subprocess output,
5058 you must call it repeatedly until it returns zero.
5060 The characters read are decoded according to PROC's coding-system
5064 read_process_output (Lisp_Object proc
, register int channel
)
5066 register ssize_t nbytes
;
5068 register Lisp_Object outstream
;
5069 register struct Lisp_Process
*p
= XPROCESS (proc
);
5070 register ptrdiff_t opoint
;
5071 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5072 int carryover
= p
->decoding_carryover
;
5074 ptrdiff_t count
= SPECPDL_INDEX ();
5075 Lisp_Object odeactivate
;
5077 chars
= alloca (carryover
+ readmax
);
5079 /* See the comment above. */
5080 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5082 #ifdef DATAGRAM_SOCKETS
5083 /* We have a working select, so proc_buffered_char is always -1. */
5084 if (DATAGRAM_CHAN_P (channel
))
5086 socklen_t len
= datagram_address
[channel
].len
;
5087 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5088 0, datagram_address
[channel
].sa
, &len
);
5093 int buffered
= 0 <= proc_buffered_char
[channel
];
5096 chars
[carryover
] = proc_buffered_char
[channel
];
5097 proc_buffered_char
[channel
] = -1;
5101 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5102 readmax
- buffered
);
5105 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5106 readmax
- buffered
);
5107 #ifdef ADAPTIVE_READ_BUFFERING
5108 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5110 int delay
= p
->read_output_delay
;
5113 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5116 process_output_delay_count
++;
5117 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5120 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5122 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5124 process_output_delay_count
--;
5126 p
->read_output_delay
= delay
;
5129 p
->read_output_skip
= 1;
5130 process_output_skip
= 1;
5135 nbytes
+= buffered
&& nbytes
<= 0;
5138 p
->decoding_carryover
= 0;
5140 /* At this point, NBYTES holds number of bytes just received
5141 (including the one in proc_buffered_char[channel]). */
5144 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5146 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5149 /* Now set NBYTES how many bytes we must decode. */
5150 nbytes
+= carryover
;
5152 odeactivate
= Vdeactivate_mark
;
5153 /* There's no good reason to let process filters change the current
5154 buffer, and many callers of accept-process-output, sit-for, and
5155 friends don't expect current-buffer to be changed from under them. */
5156 record_unwind_current_buffer ();
5158 /* Read and dispose of the process output. */
5159 outstream
= p
->filter
;
5160 if (!NILP (outstream
))
5163 bool outer_running_asynch_code
= running_asynch_code
;
5164 int waiting
= waiting_for_user_input_p
;
5166 /* No need to gcpro these, because all we do with them later
5167 is test them for EQness, and none of them should be a string. */
5169 Lisp_Object obuffer
, okeymap
;
5170 XSETBUFFER (obuffer
, current_buffer
);
5171 okeymap
= BVAR (current_buffer
, keymap
);
5174 /* We inhibit quit here instead of just catching it so that
5175 hitting ^G when a filter happens to be running won't screw
5177 specbind (Qinhibit_quit
, Qt
);
5178 specbind (Qlast_nonmenu_event
, Qt
);
5180 /* In case we get recursively called,
5181 and we already saved the match data nonrecursively,
5182 save the same match data in safely recursive fashion. */
5183 if (outer_running_asynch_code
)
5186 /* Don't clobber the CURRENT match data, either! */
5187 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5188 restore_search_regs ();
5189 record_unwind_save_match_data ();
5190 Fset_match_data (tem
, Qt
);
5193 /* For speed, if a search happens within this code,
5194 save the match data in a special nonrecursive fashion. */
5195 running_asynch_code
= 1;
5197 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5198 text
= coding
->dst_object
;
5199 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5200 /* A new coding system might be found. */
5201 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5203 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5205 /* Don't call setup_coding_system for
5206 proc_decode_coding_system[channel] here. It is done in
5207 detect_coding called via decode_coding above. */
5209 /* If a coding system for encoding is not yet decided, we set
5210 it as the same as coding-system for decoding.
5212 But, before doing that we must check if
5213 proc_encode_coding_system[p->outfd] surely points to a
5214 valid memory because p->outfd will be changed once EOF is
5215 sent to the process. */
5216 if (NILP (p
->encode_coding_system
)
5217 && proc_encode_coding_system
[p
->outfd
])
5219 pset_encode_coding_system
5220 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5221 setup_coding_system (p
->encode_coding_system
,
5222 proc_encode_coding_system
[p
->outfd
]);
5226 if (coding
->carryover_bytes
> 0)
5228 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5229 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5230 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5231 coding
->carryover_bytes
);
5232 p
->decoding_carryover
= coding
->carryover_bytes
;
5234 if (SBYTES (text
) > 0)
5235 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5236 sometimes it's simply wrong to wrap (e.g. when called from
5237 accept-process-output). */
5238 internal_condition_case_1 (read_process_output_call
,
5240 Fcons (proc
, Fcons (text
, Qnil
))),
5241 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5242 read_process_output_error_handler
);
5244 /* If we saved the match data nonrecursively, restore it now. */
5245 restore_search_regs ();
5246 running_asynch_code
= outer_running_asynch_code
;
5248 /* Restore waiting_for_user_input_p as it was
5249 when we were called, in case the filter clobbered it. */
5250 waiting_for_user_input_p
= waiting
;
5252 #if 0 /* Call record_asynch_buffer_change unconditionally,
5253 because we might have changed minor modes or other things
5254 that affect key bindings. */
5255 if (! EQ (Fcurrent_buffer (), obuffer
)
5256 || ! EQ (current_buffer
->keymap
, okeymap
))
5258 /* But do it only if the caller is actually going to read events.
5259 Otherwise there's no need to make him wake up, and it could
5260 cause trouble (for example it would make sit_for return). */
5261 if (waiting_for_user_input_p
== -1)
5262 record_asynch_buffer_change ();
5265 /* If no filter, write into buffer if it isn't dead. */
5266 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5268 Lisp_Object old_read_only
;
5269 ptrdiff_t old_begv
, old_zv
;
5270 ptrdiff_t old_begv_byte
, old_zv_byte
;
5271 ptrdiff_t before
, before_byte
;
5272 ptrdiff_t opoint_byte
;
5276 Fset_buffer (p
->buffer
);
5278 opoint_byte
= PT_BYTE
;
5279 old_read_only
= BVAR (current_buffer
, read_only
);
5282 old_begv_byte
= BEGV_BYTE
;
5283 old_zv_byte
= ZV_BYTE
;
5285 bset_read_only (current_buffer
, Qnil
);
5287 /* Insert new output into buffer
5288 at the current end-of-output marker,
5289 thus preserving logical ordering of input and output. */
5290 if (XMARKER (p
->mark
)->buffer
)
5291 SET_PT_BOTH (clip_to_bounds (BEGV
,
5292 marker_position (p
->mark
), ZV
),
5293 clip_to_bounds (BEGV_BYTE
,
5294 marker_byte_position (p
->mark
),
5297 SET_PT_BOTH (ZV
, ZV_BYTE
);
5299 before_byte
= PT_BYTE
;
5301 /* If the output marker is outside of the visible region, save
5302 the restriction and widen. */
5303 if (! (BEGV
<= PT
&& PT
<= ZV
))
5306 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5307 text
= coding
->dst_object
;
5308 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5309 /* A new coding system might be found. See the comment in the
5310 similar code in the previous `if' block. */
5311 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5313 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5314 if (NILP (p
->encode_coding_system
)
5315 && proc_encode_coding_system
[p
->outfd
])
5317 pset_encode_coding_system
5318 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5319 setup_coding_system (p
->encode_coding_system
,
5320 proc_encode_coding_system
[p
->outfd
]);
5323 if (coding
->carryover_bytes
> 0)
5325 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5326 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5327 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5328 coding
->carryover_bytes
);
5329 p
->decoding_carryover
= coding
->carryover_bytes
;
5331 /* Adjust the multibyteness of TEXT to that of the buffer. */
5332 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5333 != ! STRING_MULTIBYTE (text
))
5334 text
= (STRING_MULTIBYTE (text
)
5335 ? Fstring_as_unibyte (text
)
5336 : Fstring_to_multibyte (text
));
5337 /* Insert before markers in case we are inserting where
5338 the buffer's mark is, and the user's next command is Meta-y. */
5339 insert_from_string_before_markers (text
, 0, 0,
5340 SCHARS (text
), SBYTES (text
), 0);
5342 /* Make sure the process marker's position is valid when the
5343 process buffer is changed in the signal_after_change above.
5344 W3 is known to do that. */
5345 if (BUFFERP (p
->buffer
)
5346 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5347 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5349 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5351 update_mode_lines
++;
5353 /* Make sure opoint and the old restrictions
5354 float ahead of any new text just as point would. */
5355 if (opoint
>= before
)
5357 opoint
+= PT
- before
;
5358 opoint_byte
+= PT_BYTE
- before_byte
;
5360 if (old_begv
> before
)
5362 old_begv
+= PT
- before
;
5363 old_begv_byte
+= PT_BYTE
- before_byte
;
5365 if (old_zv
>= before
)
5367 old_zv
+= PT
- before
;
5368 old_zv_byte
+= PT_BYTE
- before_byte
;
5371 /* If the restriction isn't what it should be, set it. */
5372 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5373 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5376 bset_read_only (current_buffer
, old_read_only
);
5377 SET_PT_BOTH (opoint
, opoint_byte
);
5379 /* Handling the process output should not deactivate the mark. */
5380 Vdeactivate_mark
= odeactivate
;
5382 unbind_to (count
, Qnil
);
5386 /* Sending data to subprocess */
5388 /* In send_process, when a write fails temporarily,
5389 wait_reading_process_output is called. It may execute user code,
5390 e.g. timers, that attempts to write new data to the same process.
5391 We must ensure that data is sent in the right order, and not
5392 interspersed half-completed with other writes (Bug#10815). This is
5393 handled by the write_queue element of struct process. It is a list
5394 with each entry having the form
5396 (string . (offset . length))
5398 where STRING is a lisp string, OFFSET is the offset into the
5399 string's byte sequence from which we should begin to send, and
5400 LENGTH is the number of bytes left to send. */
5402 /* Create a new entry in write_queue.
5403 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5404 BUF is a pointer to the string sequence of the input_obj or a C
5405 string in case of Qt or Qnil. */
5408 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5409 const char *buf
, ptrdiff_t len
, int front
)
5412 Lisp_Object entry
, obj
;
5414 if (STRINGP (input_obj
))
5416 offset
= buf
- SSDATA (input_obj
);
5422 obj
= make_unibyte_string (buf
, len
);
5425 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5428 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5430 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5433 /* Remove the first element in the write_queue of process P, put its
5434 contents in OBJ, BUF and LEN, and return non-zero. If the
5435 write_queue is empty, return zero. */
5438 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5439 const char **buf
, ptrdiff_t *len
)
5441 Lisp_Object entry
, offset_length
;
5444 if (NILP (p
->write_queue
))
5447 entry
= XCAR (p
->write_queue
);
5448 pset_write_queue (p
, XCDR (p
->write_queue
));
5450 *obj
= XCAR (entry
);
5451 offset_length
= XCDR (entry
);
5453 *len
= XINT (XCDR (offset_length
));
5454 offset
= XINT (XCAR (offset_length
));
5455 *buf
= SSDATA (*obj
) + offset
;
5460 /* Send some data to process PROC.
5461 BUF is the beginning of the data; LEN is the number of characters.
5462 OBJECT is the Lisp object that the data comes from. If OBJECT is
5463 nil or t, it means that the data comes from C string.
5465 If OBJECT is not nil, the data is encoded by PROC's coding-system
5466 for encoding before it is sent.
5468 This function can evaluate Lisp code and can garbage collect. */
5471 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5474 struct Lisp_Process
*p
= XPROCESS (proc
);
5476 struct coding_system
*coding
;
5478 if (p
->raw_status_new
)
5480 if (! EQ (p
->status
, Qrun
))
5481 error ("Process %s not running", SDATA (p
->name
));
5483 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5485 coding
= proc_encode_coding_system
[p
->outfd
];
5486 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5488 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5489 || (BUFFERP (object
)
5490 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5493 pset_encode_coding_system
5494 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5495 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5497 /* The coding system for encoding was changed to raw-text
5498 because we sent a unibyte text previously. Now we are
5499 sending a multibyte text, thus we must encode it by the
5500 original coding system specified for the current process.
5502 Another reason we come here is that the coding system
5503 was just complemented and a new one was returned by
5504 complement_process_encoding_system. */
5505 setup_coding_system (p
->encode_coding_system
, coding
);
5506 Vlast_coding_system_used
= p
->encode_coding_system
;
5508 coding
->src_multibyte
= 1;
5512 coding
->src_multibyte
= 0;
5513 /* For sending a unibyte text, character code conversion should
5514 not take place but EOL conversion should. So, setup raw-text
5515 or one of the subsidiary if we have not yet done it. */
5516 if (CODING_REQUIRE_ENCODING (coding
))
5518 if (CODING_REQUIRE_FLUSHING (coding
))
5520 /* But, before changing the coding, we must flush out data. */
5521 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5522 send_process (proc
, "", 0, Qt
);
5523 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5525 setup_coding_system (raw_text_coding_system
5526 (Vlast_coding_system_used
),
5528 coding
->src_multibyte
= 0;
5531 coding
->dst_multibyte
= 0;
5533 if (CODING_REQUIRE_ENCODING (coding
))
5535 coding
->dst_object
= Qt
;
5536 if (BUFFERP (object
))
5538 ptrdiff_t from_byte
, from
, to
;
5539 ptrdiff_t save_pt
, save_pt_byte
;
5540 struct buffer
*cur
= current_buffer
;
5542 set_buffer_internal (XBUFFER (object
));
5543 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5545 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5546 from
= BYTE_TO_CHAR (from_byte
);
5547 to
= BYTE_TO_CHAR (from_byte
+ len
);
5548 TEMP_SET_PT_BOTH (from
, from_byte
);
5549 encode_coding_object (coding
, object
, from
, from_byte
,
5550 to
, from_byte
+ len
, Qt
);
5551 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5552 set_buffer_internal (cur
);
5554 else if (STRINGP (object
))
5556 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5557 SBYTES (object
), Qt
);
5561 coding
->dst_object
= make_unibyte_string (buf
, len
);
5562 coding
->produced
= len
;
5565 len
= coding
->produced
;
5566 object
= coding
->dst_object
;
5567 buf
= SSDATA (object
);
5570 if (pty_max_bytes
== 0)
5572 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5573 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5574 if (pty_max_bytes
< 0)
5575 pty_max_bytes
= 250;
5577 pty_max_bytes
= 250;
5579 /* Deduct one, to leave space for the eof. */
5583 /* If there is already data in the write_queue, put the new data
5584 in the back of queue. Otherwise, ignore it. */
5585 if (!NILP (p
->write_queue
))
5586 write_queue_push (p
, object
, buf
, len
, 0);
5588 do /* while !NILP (p->write_queue) */
5590 ptrdiff_t cur_len
= -1;
5591 const char *cur_buf
;
5592 Lisp_Object cur_object
;
5594 /* If write_queue is empty, ignore it. */
5595 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5599 cur_object
= object
;
5604 /* Send this batch, using one or more write calls. */
5605 ptrdiff_t written
= 0;
5606 int outfd
= p
->outfd
;
5607 #ifdef DATAGRAM_SOCKETS
5608 if (DATAGRAM_CHAN_P (outfd
))
5610 rv
= sendto (outfd
, cur_buf
, cur_len
,
5611 0, datagram_address
[outfd
].sa
,
5612 datagram_address
[outfd
].len
);
5615 else if (errno
== EMSGSIZE
)
5616 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5623 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5626 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5627 rv
= (written
? 0 : -1);
5628 #ifdef ADAPTIVE_READ_BUFFERING
5629 if (p
->read_output_delay
> 0
5630 && p
->adaptive_read_buffering
== 1)
5632 p
->read_output_delay
= 0;
5633 process_output_delay_count
--;
5634 p
->read_output_skip
= 0;
5643 || errno
== EWOULDBLOCK
5649 /* Buffer is full. Wait, accepting input;
5650 that may allow the program
5651 to finish doing output and read more. */
5653 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5654 /* A gross hack to work around a bug in FreeBSD.
5655 In the following sequence, read(2) returns
5659 write(2) 954 bytes, get EAGAIN
5660 read(2) 1024 bytes in process_read_output
5661 read(2) 11 bytes in process_read_output
5663 That is, read(2) returns more bytes than have
5664 ever been written successfully. The 1033 bytes
5665 read are the 1022 bytes written successfully
5666 after processing (for example with CRs added if
5667 the terminal is set up that way which it is
5668 here). The same bytes will be seen again in a
5669 later read(2), without the CRs. */
5671 if (errno
== EAGAIN
)
5674 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5676 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5678 /* Put what we should have written in wait_queue. */
5679 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5680 wait_reading_process_output (0, 20 * 1000 * 1000,
5681 0, 0, Qnil
, NULL
, 0);
5682 /* Reread queue, to see what is left. */
5685 else if (errno
== EPIPE
)
5687 p
->raw_status_new
= 0;
5688 pset_status (p
, list2 (Qexit
, make_number (256)));
5689 p
->tick
= ++process_tick
;
5690 deactivate_process (proc
);
5691 error ("process %s no longer connected to pipe; closed it",
5695 /* This is a real error. */
5696 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5702 while (!NILP (p
->write_queue
));
5705 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5707 doc
: /* Send current contents of region as input to PROCESS.
5708 PROCESS may be a process, a buffer, the name of a process or buffer, or
5709 nil, indicating the current buffer's process.
5710 Called from program, takes three arguments, PROCESS, START and END.
5711 If the region is more than 500 characters long,
5712 it is sent in several bunches. This may happen even for shorter regions.
5713 Output from processes can arrive in between bunches. */)
5714 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5717 ptrdiff_t start1
, end1
;
5719 proc
= get_process (process
);
5720 validate_region (&start
, &end
);
5722 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5723 move_gap (XINT (start
));
5725 start1
= CHAR_TO_BYTE (XINT (start
));
5726 end1
= CHAR_TO_BYTE (XINT (end
));
5727 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5728 Fcurrent_buffer ());
5733 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5735 doc
: /* Send PROCESS the contents of STRING as input.
5736 PROCESS may be a process, a buffer, the name of a process or buffer, or
5737 nil, indicating the current buffer's process.
5738 If STRING is more than 500 characters long,
5739 it is sent in several bunches. This may happen even for shorter strings.
5740 Output from processes can arrive in between bunches. */)
5741 (Lisp_Object process
, Lisp_Object string
)
5744 CHECK_STRING (string
);
5745 proc
= get_process (process
);
5746 send_process (proc
, SSDATA (string
),
5747 SBYTES (string
), string
);
5751 /* Return the foreground process group for the tty/pty that
5752 the process P uses. */
5754 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5759 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5762 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5763 master side. Try the slave side. */
5764 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5768 ioctl (fd
, TIOCGPGRP
, &gid
);
5772 #endif /* defined (TIOCGPGRP ) */
5777 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5778 Sprocess_running_child_p
, 0, 1, 0,
5779 doc
: /* Return t if PROCESS has given the terminal to a child.
5780 If the operating system does not make it possible to find out,
5781 return t unconditionally. */)
5782 (Lisp_Object process
)
5784 /* Initialize in case ioctl doesn't exist or gives an error,
5785 in a way that will cause returning t. */
5788 struct Lisp_Process
*p
;
5790 proc
= get_process (process
);
5791 p
= XPROCESS (proc
);
5793 if (!EQ (p
->type
, Qreal
))
5794 error ("Process %s is not a subprocess",
5797 error ("Process %s is not active",
5800 gid
= emacs_get_tty_pgrp (p
);
5807 /* send a signal number SIGNO to PROCESS.
5808 If CURRENT_GROUP is t, that means send to the process group
5809 that currently owns the terminal being used to communicate with PROCESS.
5810 This is used for various commands in shell mode.
5811 If CURRENT_GROUP is lambda, that means send to the process group
5812 that currently owns the terminal, but only if it is NOT the shell itself.
5814 If NOMSG is zero, insert signal-announcements into process's buffers
5817 If we can, we try to signal PROCESS by sending control characters
5818 down the pty. This allows us to signal inferiors who have changed
5819 their uid, for which killpg would return an EPERM error. */
5822 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5826 register struct Lisp_Process
*p
;
5830 proc
= get_process (process
);
5831 p
= XPROCESS (proc
);
5833 if (!EQ (p
->type
, Qreal
))
5834 error ("Process %s is not a subprocess",
5837 error ("Process %s is not active",
5841 current_group
= Qnil
;
5843 /* If we are using pgrps, get a pgrp number and make it negative. */
5844 if (NILP (current_group
))
5845 /* Send the signal to the shell's process group. */
5849 #ifdef SIGNALS_VIA_CHARACTERS
5850 /* If possible, send signals to the entire pgrp
5851 by sending an input character to it. */
5854 cc_t
*sig_char
= NULL
;
5856 tcgetattr (p
->infd
, &t
);
5861 sig_char
= &t
.c_cc
[VINTR
];
5865 sig_char
= &t
.c_cc
[VQUIT
];
5869 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5870 sig_char
= &t
.c_cc
[VSWTCH
];
5872 sig_char
= &t
.c_cc
[VSUSP
];
5877 if (sig_char
&& *sig_char
!= CDISABLE
)
5879 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5882 /* If we can't send the signal with a character,
5883 fall through and send it another way. */
5885 /* The code above may fall through if it can't
5886 handle the signal. */
5887 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5890 /* Get the current pgrp using the tty itself, if we have that.
5891 Otherwise, use the pty to get the pgrp.
5892 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5893 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5894 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5895 His patch indicates that if TIOCGPGRP returns an error, then
5896 we should just assume that p->pid is also the process group id. */
5898 gid
= emacs_get_tty_pgrp (p
);
5901 /* If we can't get the information, assume
5902 the shell owns the tty. */
5905 /* It is not clear whether anything really can set GID to -1.
5906 Perhaps on some system one of those ioctls can or could do so.
5907 Or perhaps this is vestigial. */
5910 #else /* ! defined (TIOCGPGRP ) */
5911 /* Can't select pgrps on this system, so we know that
5912 the child itself heads the pgrp. */
5914 #endif /* ! defined (TIOCGPGRP ) */
5916 /* If current_group is lambda, and the shell owns the terminal,
5917 don't send any signal. */
5918 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5926 p
->raw_status_new
= 0;
5927 pset_status (p
, Qrun
);
5928 p
->tick
= ++process_tick
;
5931 status_notify (NULL
);
5932 redisplay_preserve_echo_area (13);
5935 #endif /* ! defined (SIGCONT) */
5939 flush_pending_output (p
->infd
);
5943 /* If we don't have process groups, send the signal to the immediate
5944 subprocess. That isn't really right, but it's better than any
5945 obvious alternative. */
5948 kill (p
->pid
, signo
);
5952 /* gid may be a pid, or minus a pgrp's number */
5954 if (!NILP (current_group
))
5956 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5957 EMACS_KILLPG (gid
, signo
);
5964 #else /* ! defined (TIOCSIGSEND) */
5965 EMACS_KILLPG (gid
, signo
);
5966 #endif /* ! defined (TIOCSIGSEND) */
5969 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5970 doc
: /* Interrupt process PROCESS.
5971 PROCESS may be a process, a buffer, or the name of a process or buffer.
5972 No arg or nil means current buffer's process.
5973 Second arg CURRENT-GROUP non-nil means send signal to
5974 the current process-group of the process's controlling terminal
5975 rather than to the process's own process group.
5976 If the process is a shell, this means interrupt current subjob
5977 rather than the shell.
5979 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5980 don't send the signal. */)
5981 (Lisp_Object process
, Lisp_Object current_group
)
5983 process_send_signal (process
, SIGINT
, current_group
, 0);
5987 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5988 doc
: /* Kill process PROCESS. May be process or name of one.
5989 See function `interrupt-process' for more details on usage. */)
5990 (Lisp_Object process
, Lisp_Object current_group
)
5992 process_send_signal (process
, SIGKILL
, current_group
, 0);
5996 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5997 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5998 See function `interrupt-process' for more details on usage. */)
5999 (Lisp_Object process
, Lisp_Object current_group
)
6001 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6005 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6006 doc
: /* Stop process PROCESS. May be process or name of one.
6007 See function `interrupt-process' for more details on usage.
6008 If PROCESS is a network or serial process, inhibit handling of incoming
6010 (Lisp_Object process
, Lisp_Object current_group
)
6012 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6014 struct Lisp_Process
*p
;
6016 p
= XPROCESS (process
);
6017 if (NILP (p
->command
)
6020 FD_CLR (p
->infd
, &input_wait_mask
);
6021 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6023 pset_command (p
, Qt
);
6027 error ("No SIGTSTP support");
6029 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6034 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6035 doc
: /* Continue process PROCESS. May be process or name of one.
6036 See function `interrupt-process' for more details on usage.
6037 If PROCESS is a network or serial process, resume handling of incoming
6039 (Lisp_Object process
, Lisp_Object current_group
)
6041 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6043 struct Lisp_Process
*p
;
6045 p
= XPROCESS (process
);
6046 if (EQ (p
->command
, Qt
)
6048 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6050 FD_SET (p
->infd
, &input_wait_mask
);
6051 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6053 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6054 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6055 #else /* not WINDOWSNT */
6056 tcflush (p
->infd
, TCIFLUSH
);
6057 #endif /* not WINDOWSNT */
6059 pset_command (p
, Qnil
);
6063 process_send_signal (process
, SIGCONT
, current_group
, 0);
6065 error ("No SIGCONT support");
6070 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6071 2, 2, "sProcess (name or number): \nnSignal code: ",
6072 doc
: /* Send PROCESS the signal with code SIGCODE.
6073 PROCESS may also be a number specifying the process id of the
6074 process to signal; in this case, the process need not be a child of
6076 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6077 (Lisp_Object process
, Lisp_Object sigcode
)
6081 if (STRINGP (process
))
6083 Lisp_Object tem
= Fget_process (process
);
6086 Lisp_Object process_number
=
6087 string_to_number (SSDATA (process
), 10, 1);
6088 if (INTEGERP (process_number
) || FLOATP (process_number
))
6089 tem
= process_number
;
6093 else if (!NUMBERP (process
))
6094 process
= get_process (process
);
6099 if (NUMBERP (process
))
6100 CONS_TO_INTEGER (process
, pid_t
, pid
);
6103 CHECK_PROCESS (process
);
6104 pid
= XPROCESS (process
)->pid
;
6106 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6109 #define parse_signal(NAME, VALUE) \
6110 else if (!xstrcasecmp (name, NAME)) \
6111 XSETINT (sigcode, VALUE)
6113 if (INTEGERP (sigcode
))
6114 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6119 CHECK_SYMBOL (sigcode
);
6120 name
= SSDATA (SYMBOL_NAME (sigcode
));
6122 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6128 parse_signal ("usr1", SIGUSR1
);
6131 parse_signal ("usr2", SIGUSR2
);
6133 parse_signal ("term", SIGTERM
);
6135 parse_signal ("hup", SIGHUP
);
6137 parse_signal ("int", SIGINT
);
6139 parse_signal ("quit", SIGQUIT
);
6141 parse_signal ("ill", SIGILL
);
6142 parse_signal ("abrt", SIGABRT
);
6144 parse_signal ("emt", SIGEMT
);
6147 parse_signal ("kill", SIGKILL
);
6149 parse_signal ("fpe", SIGFPE
);
6151 parse_signal ("bus", SIGBUS
);
6153 parse_signal ("segv", SIGSEGV
);
6155 parse_signal ("sys", SIGSYS
);
6158 parse_signal ("pipe", SIGPIPE
);
6161 parse_signal ("alrm", SIGALRM
);
6164 parse_signal ("urg", SIGURG
);
6167 parse_signal ("stop", SIGSTOP
);
6170 parse_signal ("tstp", SIGTSTP
);
6173 parse_signal ("cont", SIGCONT
);
6176 parse_signal ("chld", SIGCHLD
);
6179 parse_signal ("ttin", SIGTTIN
);
6182 parse_signal ("ttou", SIGTTOU
);
6185 parse_signal ("io", SIGIO
);
6188 parse_signal ("xcpu", SIGXCPU
);
6191 parse_signal ("xfsz", SIGXFSZ
);
6194 parse_signal ("vtalrm", SIGVTALRM
);
6197 parse_signal ("prof", SIGPROF
);
6200 parse_signal ("winch", SIGWINCH
);
6203 parse_signal ("info", SIGINFO
);
6206 error ("Undefined signal name %s", name
);
6211 return make_number (kill (pid
, XINT (sigcode
)));
6214 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6215 doc
: /* Make PROCESS see end-of-file in its input.
6216 EOF comes after any text already sent to it.
6217 PROCESS may be a process, a buffer, the name of a process or buffer, or
6218 nil, indicating the current buffer's process.
6219 If PROCESS is a network connection, or is a process communicating
6220 through a pipe (as opposed to a pty), then you cannot send any more
6221 text to PROCESS after you call this function.
6222 If PROCESS is a serial process, wait until all output written to the
6223 process has been transmitted to the serial port. */)
6224 (Lisp_Object process
)
6227 struct coding_system
*coding
;
6229 if (DATAGRAM_CONN_P (process
))
6232 proc
= get_process (process
);
6233 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6235 /* Make sure the process is really alive. */
6236 if (XPROCESS (proc
)->raw_status_new
)
6237 update_status (XPROCESS (proc
));
6238 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6239 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6241 if (CODING_REQUIRE_FLUSHING (coding
))
6243 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6244 send_process (proc
, "", 0, Qnil
);
6247 if (XPROCESS (proc
)->pty_flag
)
6248 send_process (proc
, "\004", 1, Qnil
);
6249 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6252 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6253 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6254 #endif /* not WINDOWSNT */
6255 /* Do nothing on Windows because writes are blocking. */
6259 int old_outfd
, new_outfd
;
6261 #ifdef HAVE_SHUTDOWN
6262 /* If this is a network connection, or socketpair is used
6263 for communication with the subprocess, call shutdown to cause EOF.
6264 (In some old system, shutdown to socketpair doesn't work.
6265 Then we just can't win.) */
6266 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6267 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6268 shutdown (XPROCESS (proc
)->outfd
, 1);
6269 /* In case of socketpair, outfd == infd, so don't close it. */
6270 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6271 emacs_close (XPROCESS (proc
)->outfd
);
6272 #else /* not HAVE_SHUTDOWN */
6273 emacs_close (XPROCESS (proc
)->outfd
);
6274 #endif /* not HAVE_SHUTDOWN */
6275 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6278 old_outfd
= XPROCESS (proc
)->outfd
;
6280 if (!proc_encode_coding_system
[new_outfd
])
6281 proc_encode_coding_system
[new_outfd
]
6282 = xmalloc (sizeof (struct coding_system
));
6283 *proc_encode_coding_system
[new_outfd
]
6284 = *proc_encode_coding_system
[old_outfd
];
6285 memset (proc_encode_coding_system
[old_outfd
], 0,
6286 sizeof (struct coding_system
));
6288 XPROCESS (proc
)->outfd
= new_outfd
;
6293 /* On receipt of a signal that a child status has changed, loop asking
6294 about children with changed statuses until the system says there
6297 All we do is change the status; we do not run sentinels or print
6298 notifications. That is saved for the next time keyboard input is
6299 done, in order to avoid timing errors.
6301 ** WARNING: this can be called during garbage collection.
6302 Therefore, it must not be fooled by the presence of mark bits in
6305 ** USG WARNING: Although it is not obvious from the documentation
6306 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6307 signal() before executing at least one wait(), otherwise the
6308 handler will be called again, resulting in an infinite loop. The
6309 relevant portion of the documentation reads "SIGCLD signals will be
6310 queued and the signal-catching function will be continually
6311 reentered until the queue is empty". Invoking signal() causes the
6312 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6315 ** Malloc WARNING: This should never call malloc either directly or
6316 indirectly; if it does, that is a bug */
6318 /* Record the changed status of the child process PID with wait status W. */
6320 record_child_status_change (pid_t pid
, int w
)
6324 struct Lisp_Process
*p
;
6327 /* Find the process that signaled us, and record its status. */
6329 /* The process can have been deleted by Fdelete_process. */
6330 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6332 Lisp_Object xpid
= XCAR (tail
);
6333 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6334 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6336 XSETCAR (tail
, Qnil
);
6341 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6343 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6345 proc
= XCDR (XCAR (tail
));
6346 p
= XPROCESS (proc
);
6347 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6352 /* Look for an asynchronous process whose pid hasn't been filled
6355 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6357 proc
= XCDR (XCAR (tail
));
6358 p
= XPROCESS (proc
);
6364 /* Change the status of the process that was found. */
6367 int clear_desc_flag
= 0;
6369 p
->tick
= ++process_tick
;
6371 p
->raw_status_new
= 1;
6373 /* If process has terminated, stop waiting for its output. */
6374 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6376 clear_desc_flag
= 1;
6378 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6379 if (clear_desc_flag
)
6381 FD_CLR (p
->infd
, &input_wait_mask
);
6382 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6385 /* Tell wait_reading_process_output that it needs to wake up and
6387 if (input_available_clear_time
)
6388 *input_available_clear_time
= make_emacs_time (0, 0);
6390 /* There was no asynchronous process found for that pid: we have
6391 a synchronous process. */
6394 synch_process_alive
= 0;
6396 /* Report the status of the synchronous process. */
6398 synch_process_retcode
= WEXITSTATUS (w
);
6399 else if (WIFSIGNALED (w
))
6400 synch_process_termsig
= WTERMSIG (w
);
6402 /* Tell wait_reading_process_output that it needs to wake up and
6404 if (input_available_clear_time
)
6405 *input_available_clear_time
= make_emacs_time (0, 0);
6412 /* On some systems, the SIGCHLD handler must return right away. If
6413 any more processes want to signal us, we will get another signal.
6414 Otherwise, loop around to use up all the processes that have
6415 something to tell us. */
6416 #if (defined WINDOWSNT \
6417 || (defined USG && !defined GNU_LINUX \
6418 && !(defined HPUX && defined WNOHANG)))
6419 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 0 };
6421 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 1 };
6425 handle_child_signal (int sig
)
6433 pid
= waitpid (-1, &status
, WNOHANG
| WUNTRACED
);
6434 while (pid
< 0 && errno
== EINTR
);
6436 /* PID == 0 means no processes found, PID == -1 means a real failure.
6437 Either way, we have done all our job. */
6441 record_child_status_change (pid
, status
);
6443 while (CAN_HANDLE_MULTIPLE_CHILDREN
);
6447 deliver_child_signal (int sig
)
6449 deliver_process_signal (sig
, handle_child_signal
);
6452 #endif /* SIGCHLD */
6456 exec_sentinel_unwind (Lisp_Object data
)
6458 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6463 exec_sentinel_error_handler (Lisp_Object error_val
)
6465 cmd_error_internal (error_val
, "error in process sentinel: ");
6467 update_echo_area ();
6468 Fsleep_for (make_number (2), Qnil
);
6473 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6475 Lisp_Object sentinel
, odeactivate
;
6476 struct Lisp_Process
*p
= XPROCESS (proc
);
6477 ptrdiff_t count
= SPECPDL_INDEX ();
6478 bool outer_running_asynch_code
= running_asynch_code
;
6479 int waiting
= waiting_for_user_input_p
;
6481 if (inhibit_sentinels
)
6484 /* No need to gcpro these, because all we do with them later
6485 is test them for EQness, and none of them should be a string. */
6486 odeactivate
= Vdeactivate_mark
;
6488 Lisp_Object obuffer
, okeymap
;
6489 XSETBUFFER (obuffer
, current_buffer
);
6490 okeymap
= BVAR (current_buffer
, keymap
);
6493 /* There's no good reason to let sentinels change the current
6494 buffer, and many callers of accept-process-output, sit-for, and
6495 friends don't expect current-buffer to be changed from under them. */
6496 record_unwind_current_buffer ();
6498 sentinel
= p
->sentinel
;
6499 if (NILP (sentinel
))
6502 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6503 assure that it gets restored no matter how the sentinel exits. */
6504 pset_sentinel (p
, Qnil
);
6505 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6506 /* Inhibit quit so that random quits don't screw up a running filter. */
6507 specbind (Qinhibit_quit
, Qt
);
6508 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6510 /* In case we get recursively called,
6511 and we already saved the match data nonrecursively,
6512 save the same match data in safely recursive fashion. */
6513 if (outer_running_asynch_code
)
6516 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6517 restore_search_regs ();
6518 record_unwind_save_match_data ();
6519 Fset_match_data (tem
, Qt
);
6522 /* For speed, if a search happens within this code,
6523 save the match data in a special nonrecursive fashion. */
6524 running_asynch_code
= 1;
6526 internal_condition_case_1 (read_process_output_call
,
6528 Fcons (proc
, Fcons (reason
, Qnil
))),
6529 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6530 exec_sentinel_error_handler
);
6532 /* If we saved the match data nonrecursively, restore it now. */
6533 restore_search_regs ();
6534 running_asynch_code
= outer_running_asynch_code
;
6536 Vdeactivate_mark
= odeactivate
;
6538 /* Restore waiting_for_user_input_p as it was
6539 when we were called, in case the filter clobbered it. */
6540 waiting_for_user_input_p
= waiting
;
6543 if (! EQ (Fcurrent_buffer (), obuffer
)
6544 || ! EQ (current_buffer
->keymap
, okeymap
))
6546 /* But do it only if the caller is actually going to read events.
6547 Otherwise there's no need to make him wake up, and it could
6548 cause trouble (for example it would make sit_for return). */
6549 if (waiting_for_user_input_p
== -1)
6550 record_asynch_buffer_change ();
6552 unbind_to (count
, Qnil
);
6555 /* Report all recent events of a change in process status
6556 (either run the sentinel or output a message).
6557 This is usually done while Emacs is waiting for keyboard input
6558 but can be done at other times. */
6561 status_notify (struct Lisp_Process
*deleting_process
)
6563 register Lisp_Object proc
, buffer
;
6564 Lisp_Object tail
, msg
;
6565 struct gcpro gcpro1
, gcpro2
;
6569 /* We need to gcpro tail; if read_process_output calls a filter
6570 which deletes a process and removes the cons to which tail points
6571 from Vprocess_alist, and then causes a GC, tail is an unprotected
6575 /* Set this now, so that if new processes are created by sentinels
6576 that we run, we get called again to handle their status changes. */
6577 update_tick
= process_tick
;
6579 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6582 register struct Lisp_Process
*p
;
6584 proc
= Fcdr (XCAR (tail
));
6585 p
= XPROCESS (proc
);
6587 if (p
->tick
!= p
->update_tick
)
6589 p
->update_tick
= p
->tick
;
6591 /* If process is still active, read any output that remains. */
6592 while (! EQ (p
->filter
, Qt
)
6593 && ! EQ (p
->status
, Qconnect
)
6594 && ! EQ (p
->status
, Qlisten
)
6595 /* Network or serial process not stopped: */
6596 && ! EQ (p
->command
, Qt
)
6598 && p
!= deleting_process
6599 && read_process_output (proc
, p
->infd
) > 0);
6603 /* Get the text to use for the message. */
6604 if (p
->raw_status_new
)
6606 msg
= status_message (p
);
6608 /* If process is terminated, deactivate it or delete it. */
6610 if (CONSP (p
->status
))
6611 symbol
= XCAR (p
->status
);
6613 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6614 || EQ (symbol
, Qclosed
))
6616 if (delete_exited_processes
)
6617 remove_process (proc
);
6619 deactivate_process (proc
);
6622 /* The actions above may have further incremented p->tick.
6623 So set p->update_tick again
6624 so that an error in the sentinel will not cause
6625 this code to be run again. */
6626 p
->update_tick
= p
->tick
;
6627 /* Now output the message suitably. */
6628 if (!NILP (p
->sentinel
))
6629 exec_sentinel (proc
, msg
);
6630 /* Don't bother with a message in the buffer
6631 when a process becomes runnable. */
6632 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6635 struct buffer
*old
= current_buffer
;
6636 ptrdiff_t opoint
, opoint_byte
;
6637 ptrdiff_t before
, before_byte
;
6639 /* Avoid error if buffer is deleted
6640 (probably that's why the process is dead, too) */
6641 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6643 Fset_buffer (buffer
);
6646 opoint_byte
= PT_BYTE
;
6647 /* Insert new output into buffer
6648 at the current end-of-output marker,
6649 thus preserving logical ordering of input and output. */
6650 if (XMARKER (p
->mark
)->buffer
)
6651 Fgoto_char (p
->mark
);
6653 SET_PT_BOTH (ZV
, ZV_BYTE
);
6656 before_byte
= PT_BYTE
;
6658 tem
= BVAR (current_buffer
, read_only
);
6659 bset_read_only (current_buffer
, Qnil
);
6660 insert_string ("\nProcess ");
6661 { /* FIXME: temporary kludge */
6662 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6663 insert_string (" ");
6665 bset_read_only (current_buffer
, tem
);
6666 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6668 if (opoint
>= before
)
6669 SET_PT_BOTH (opoint
+ (PT
- before
),
6670 opoint_byte
+ (PT_BYTE
- before_byte
));
6672 SET_PT_BOTH (opoint
, opoint_byte
);
6674 set_buffer_internal (old
);
6679 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6684 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6685 Sset_process_coding_system
, 1, 3, 0,
6686 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6687 DECODING will be used to decode subprocess output and ENCODING to
6688 encode subprocess input. */)
6689 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6691 register struct Lisp_Process
*p
;
6693 CHECK_PROCESS (process
);
6694 p
= XPROCESS (process
);
6696 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6698 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6699 Fcheck_coding_system (decoding
);
6700 Fcheck_coding_system (encoding
);
6701 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6702 pset_decode_coding_system (p
, decoding
);
6703 pset_encode_coding_system (p
, encoding
);
6704 setup_process_coding_systems (process
);
6709 DEFUN ("process-coding-system",
6710 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6711 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6712 (register Lisp_Object process
)
6714 CHECK_PROCESS (process
);
6715 return Fcons (XPROCESS (process
)->decode_coding_system
,
6716 XPROCESS (process
)->encode_coding_system
);
6719 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6720 Sset_process_filter_multibyte
, 2, 2, 0,
6721 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6722 If FLAG is non-nil, the filter is given multibyte strings.
6723 If FLAG is nil, the filter is given unibyte strings. In this case,
6724 all character code conversion except for end-of-line conversion is
6726 (Lisp_Object process
, Lisp_Object flag
)
6728 register struct Lisp_Process
*p
;
6730 CHECK_PROCESS (process
);
6731 p
= XPROCESS (process
);
6733 pset_decode_coding_system
6734 (p
, raw_text_coding_system (p
->decode_coding_system
));
6735 setup_process_coding_systems (process
);
6740 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6741 Sprocess_filter_multibyte_p
, 1, 1, 0,
6742 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6743 (Lisp_Object process
)
6745 register struct Lisp_Process
*p
;
6746 struct coding_system
*coding
;
6748 CHECK_PROCESS (process
);
6749 p
= XPROCESS (process
);
6750 coding
= proc_decode_coding_system
[p
->infd
];
6751 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6760 add_gpm_wait_descriptor (int desc
)
6762 add_keyboard_wait_descriptor (desc
);
6766 delete_gpm_wait_descriptor (int desc
)
6768 delete_keyboard_wait_descriptor (desc
);
6773 # ifdef USABLE_SIGIO
6775 /* Return nonzero if *MASK has a bit set
6776 that corresponds to one of the keyboard input descriptors. */
6779 keyboard_bit_set (fd_set
*mask
)
6783 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6784 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6785 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6792 #else /* not subprocesses */
6794 /* Defined on msdos.c. */
6795 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6796 EMACS_TIME
*, void *);
6798 /* Implementation of wait_reading_process_output, assuming that there
6799 are no subprocesses. Used only by the MS-DOS build.
6801 Wait for timeout to elapse and/or keyboard input to be available.
6805 If negative, gobble data immediately available but don't wait for any.
6808 an additional duration to wait, measured in nanoseconds
6809 If TIME_LIMIT is zero, then:
6810 If NSECS == 0, there is no limit.
6811 If NSECS > 0, the timeout consists of NSECS only.
6812 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6815 0 to ignore keyboard input, or
6816 1 to return when input is available, or
6817 -1 means caller will actually read the input, so don't throw to
6820 see full version for other parameters. We know that wait_proc will
6821 always be NULL, since `subprocesses' isn't defined.
6823 DO_DISPLAY != 0 means redisplay should be done to show subprocess
6824 output that arrives.
6826 Return true if we received input from any process. */
6829 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6831 Lisp_Object wait_for_cell
,
6832 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6835 EMACS_TIME end_time
, timeout
;
6842 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6843 time_limit
= TYPE_MAXIMUM (time_t);
6845 /* What does time_limit really mean? */
6846 if (time_limit
|| 0 < nsecs
)
6848 timeout
= make_emacs_time (time_limit
, nsecs
);
6849 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6852 /* Turn off periodic alarms (in case they are in use)
6853 and then turn off any other atimers,
6854 because the select emulator uses alarms. */
6856 turn_on_atimers (0);
6860 int timeout_reduced_for_timers
= 0;
6861 SELECT_TYPE waitchannels
;
6864 /* If calling from keyboard input, do not quit
6865 since we want to return C-g as an input character.
6866 Otherwise, do pending quit if requested. */
6870 /* Exit now if the cell we're waiting for became non-nil. */
6871 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6874 /* Compute time from now till when time limit is up */
6875 /* Exit if already run out */
6878 /* A negative timeout means
6879 gobble output available now
6880 but don't wait at all. */
6882 timeout
= make_emacs_time (0, 0);
6884 else if (time_limit
|| 0 < nsecs
)
6886 EMACS_TIME now
= current_emacs_time ();
6887 if (EMACS_TIME_LE (end_time
, now
))
6889 timeout
= sub_emacs_time (end_time
, now
);
6893 timeout
= make_emacs_time (100000, 0);
6896 /* If our caller will not immediately handle keyboard events,
6897 run timer events directly.
6898 (Callers that will immediately read keyboard events
6899 call timer_delay on their own.) */
6900 if (NILP (wait_for_cell
))
6902 EMACS_TIME timer_delay
;
6906 int old_timers_run
= timers_run
;
6907 timer_delay
= timer_check ();
6908 if (timers_run
!= old_timers_run
&& do_display
)
6909 /* We must retry, since a timer may have requeued itself
6910 and that could alter the time delay. */
6911 redisplay_preserve_echo_area (14);
6915 while (!detect_input_pending ());
6917 /* If there is unread keyboard input, also return. */
6919 && requeued_events_pending_p ())
6922 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6924 if (EMACS_TIME_LT (timer_delay
, timeout
))
6926 timeout
= timer_delay
;
6927 timeout_reduced_for_timers
= 1;
6932 /* Cause C-g and alarm signals to take immediate action,
6933 and cause input available signals to zero out timeout. */
6935 set_waiting_for_input (&timeout
);
6937 /* If a frame has been newly mapped and needs updating,
6938 reprocess its display stuff. */
6939 if (frame_garbaged
&& do_display
)
6941 clear_waiting_for_input ();
6942 redisplay_preserve_echo_area (15);
6944 set_waiting_for_input (&timeout
);
6947 /* Wait till there is something to do. */
6948 FD_ZERO (&waitchannels
);
6949 if (read_kbd
&& detect_input_pending ())
6953 if (read_kbd
|| !NILP (wait_for_cell
))
6954 FD_SET (0, &waitchannels
);
6955 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6960 /* Make C-g and alarm signals set flags again */
6961 clear_waiting_for_input ();
6963 /* If we woke up due to SIGWINCH, actually change size now. */
6964 do_pending_window_change (0);
6966 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6967 /* We waited the full specified time, so return now. */
6972 /* If the system call was interrupted, then go around the
6974 if (xerrno
== EINTR
)
6975 FD_ZERO (&waitchannels
);
6977 error ("select error: %s", emacs_strerror (xerrno
));
6980 /* Check for keyboard input */
6983 && detect_input_pending_run_timers (do_display
))
6985 swallow_events (do_display
);
6986 if (detect_input_pending_run_timers (do_display
))
6990 /* If there is unread keyboard input, also return. */
6992 && requeued_events_pending_p ())
6995 /* If wait_for_cell. check for keyboard input
6996 but don't run any timers.
6997 ??? (It seems wrong to me to check for keyboard
6998 input at all when wait_for_cell, but the code
6999 has been this way since July 1994.
7000 Try changing this after version 19.31.) */
7001 if (! NILP (wait_for_cell
)
7002 && detect_input_pending ())
7004 swallow_events (do_display
);
7005 if (detect_input_pending ())
7009 /* Exit now if the cell we're waiting for became non-nil. */
7010 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7019 #endif /* not subprocesses */
7021 /* The following functions are needed even if async subprocesses are
7022 not supported. Some of them are no-op stubs in that case. */
7024 /* Add DESC to the set of keyboard input descriptors. */
7027 add_keyboard_wait_descriptor (int desc
)
7029 #ifdef subprocesses /* actually means "not MSDOS" */
7030 FD_SET (desc
, &input_wait_mask
);
7031 FD_SET (desc
, &non_process_wait_mask
);
7032 if (desc
> max_input_desc
)
7033 max_input_desc
= desc
;
7037 /* From now on, do not expect DESC to give keyboard input. */
7040 delete_keyboard_wait_descriptor (int desc
)
7044 int lim
= max_input_desc
;
7046 FD_CLR (desc
, &input_wait_mask
);
7047 FD_CLR (desc
, &non_process_wait_mask
);
7049 if (desc
== max_input_desc
)
7050 for (fd
= 0; fd
< lim
; fd
++)
7051 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7052 max_input_desc
= fd
;
7056 /* Setup coding systems of PROCESS. */
7059 setup_process_coding_systems (Lisp_Object process
)
7062 struct Lisp_Process
*p
= XPROCESS (process
);
7064 int outch
= p
->outfd
;
7065 Lisp_Object coding_system
;
7067 if (inch
< 0 || outch
< 0)
7070 if (!proc_decode_coding_system
[inch
])
7071 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7072 coding_system
= p
->decode_coding_system
;
7073 if (! NILP (p
->filter
))
7075 else if (BUFFERP (p
->buffer
))
7077 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7078 coding_system
= raw_text_coding_system (coding_system
);
7080 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7082 if (!proc_encode_coding_system
[outch
])
7083 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7084 setup_coding_system (p
->encode_coding_system
,
7085 proc_encode_coding_system
[outch
]);
7089 /* Close all descriptors currently in use for communication
7090 with subprocess. This is used in a newly-forked subprocess
7091 to get rid of irrelevant descriptors. */
7094 close_process_descs (void)
7098 for (i
= 0; i
< MAXDESC
; i
++)
7100 Lisp_Object process
;
7101 process
= chan_process
[i
];
7102 if (!NILP (process
))
7104 int in
= XPROCESS (process
)->infd
;
7105 int out
= XPROCESS (process
)->outfd
;
7108 if (out
>= 0 && in
!= out
)
7115 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7116 doc
: /* Return the (or a) process associated with BUFFER.
7117 BUFFER may be a buffer or the name of one. */)
7118 (register Lisp_Object buffer
)
7121 register Lisp_Object buf
, tail
, proc
;
7123 if (NILP (buffer
)) return Qnil
;
7124 buf
= Fget_buffer (buffer
);
7125 if (NILP (buf
)) return Qnil
;
7127 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7129 proc
= Fcdr (XCAR (tail
));
7130 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7133 #endif /* subprocesses */
7137 DEFUN ("process-inherit-coding-system-flag",
7138 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7140 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7141 If this flag is t, `buffer-file-coding-system' of the buffer
7142 associated with PROCESS will inherit the coding system used to decode
7143 the process output. */)
7144 (register Lisp_Object process
)
7147 CHECK_PROCESS (process
);
7148 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7150 /* Ignore the argument and return the value of
7151 inherit-process-coding-system. */
7152 return inherit_process_coding_system
? Qt
: Qnil
;
7156 /* Kill all processes associated with `buffer'.
7157 If `buffer' is nil, kill all processes */
7160 kill_buffer_processes (Lisp_Object buffer
)
7163 Lisp_Object tail
, proc
;
7165 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7167 proc
= XCDR (XCAR (tail
));
7169 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7171 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7172 Fdelete_process (proc
);
7173 else if (XPROCESS (proc
)->infd
>= 0)
7174 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7177 #else /* subprocesses */
7178 /* Since we have no subprocesses, this does nothing. */
7179 #endif /* subprocesses */
7182 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7183 Swaiting_for_user_input_p
, 0, 0, 0,
7184 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7185 This is intended for use by asynchronous process output filters and sentinels. */)
7189 return (waiting_for_user_input_p
? Qt
: Qnil
);
7195 /* Stop reading input from keyboard sources. */
7198 hold_keyboard_input (void)
7203 /* Resume reading input from keyboard sources. */
7206 unhold_keyboard_input (void)
7211 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7214 kbd_on_hold_p (void)
7216 return kbd_is_on_hold
;
7220 /* Enumeration of and access to system processes a-la ps(1). */
7222 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7224 doc
: /* Return a list of numerical process IDs of all running processes.
7225 If this functionality is unsupported, return nil.
7227 See `process-attributes' for getting attributes of a process given its ID. */)
7230 return list_system_processes ();
7233 DEFUN ("process-attributes", Fprocess_attributes
,
7234 Sprocess_attributes
, 1, 1, 0,
7235 doc
: /* Return attributes of the process given by its PID, a number.
7237 Value is an alist where each element is a cons cell of the form
7241 If this functionality is unsupported, the value is nil.
7243 See `list-system-processes' for getting a list of all process IDs.
7245 The KEYs of the attributes that this function may return are listed
7246 below, together with the type of the associated VALUE (in parentheses).
7247 Not all platforms support all of these attributes; unsupported
7248 attributes will not appear in the returned alist.
7249 Unless explicitly indicated otherwise, numbers can have either
7250 integer or floating point values.
7252 euid -- Effective user User ID of the process (number)
7253 user -- User name corresponding to euid (string)
7254 egid -- Effective user Group ID of the process (number)
7255 group -- Group name corresponding to egid (string)
7256 comm -- Command name (executable name only) (string)
7257 state -- Process state code, such as "S", "R", or "T" (string)
7258 ppid -- Parent process ID (number)
7259 pgrp -- Process group ID (number)
7260 sess -- Session ID, i.e. process ID of session leader (number)
7261 ttname -- Controlling tty name (string)
7262 tpgid -- ID of foreground process group on the process's tty (number)
7263 minflt -- number of minor page faults (number)
7264 majflt -- number of major page faults (number)
7265 cminflt -- cumulative number of minor page faults (number)
7266 cmajflt -- cumulative number of major page faults (number)
7267 utime -- user time used by the process, in (current-time) format,
7268 which is a list of integers (HIGH LOW USEC PSEC)
7269 stime -- system time used by the process (current-time)
7270 time -- sum of utime and stime (current-time)
7271 cutime -- user time used by the process and its children (current-time)
7272 cstime -- system time used by the process and its children (current-time)
7273 ctime -- sum of cutime and cstime (current-time)
7274 pri -- priority of the process (number)
7275 nice -- nice value of the process (number)
7276 thcount -- process thread count (number)
7277 start -- time the process started (current-time)
7278 vsize -- virtual memory size of the process in KB's (number)
7279 rss -- resident set size of the process in KB's (number)
7280 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7281 pcpu -- percents of CPU time used by the process (floating-point number)
7282 pmem -- percents of total physical memory used by process's resident set
7283 (floating-point number)
7284 args -- command line which invoked the process (string). */)
7287 return system_process_attributes (pid
);
7291 /* This is not called "init_process" because that is the name of a
7292 Mach system call, so it would cause problems on Darwin systems. */
7294 init_process_emacs (void)
7299 inhibit_sentinels
= 0;
7303 if (! noninteractive
|| initialized
)
7306 struct sigaction action
;
7307 emacs_sigaction_init (&action
, deliver_child_signal
);
7308 sigaction (SIGCHLD
, &action
, 0);
7312 FD_ZERO (&input_wait_mask
);
7313 FD_ZERO (&non_keyboard_wait_mask
);
7314 FD_ZERO (&non_process_wait_mask
);
7315 FD_ZERO (&write_mask
);
7316 max_process_desc
= 0;
7317 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7319 #ifdef NON_BLOCKING_CONNECT
7320 FD_ZERO (&connect_wait_mask
);
7321 num_pending_connects
= 0;
7324 #ifdef ADAPTIVE_READ_BUFFERING
7325 process_output_delay_count
= 0;
7326 process_output_skip
= 0;
7329 /* Don't do this, it caused infinite select loops. The display
7330 method should call add_keyboard_wait_descriptor on stdin if it
7333 FD_SET (0, &input_wait_mask
);
7336 Vprocess_alist
= Qnil
;
7338 deleted_pid_list
= Qnil
;
7340 for (i
= 0; i
< MAXDESC
; i
++)
7342 chan_process
[i
] = Qnil
;
7343 proc_buffered_char
[i
] = -1;
7345 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7346 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7347 #ifdef DATAGRAM_SOCKETS
7348 memset (datagram_address
, 0, sizeof datagram_address
);
7352 Lisp_Object subfeatures
= Qnil
;
7353 const struct socket_options
*sopt
;
7355 #define ADD_SUBFEATURE(key, val) \
7356 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7358 #ifdef NON_BLOCKING_CONNECT
7359 ADD_SUBFEATURE (QCnowait
, Qt
);
7361 #ifdef DATAGRAM_SOCKETS
7362 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7364 #ifdef HAVE_SEQPACKET
7365 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7367 #ifdef HAVE_LOCAL_SOCKETS
7368 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7370 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7372 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7374 #ifdef HAVE_GETSOCKNAME
7375 ADD_SUBFEATURE (QCservice
, Qt
);
7377 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7378 ADD_SUBFEATURE (QCserver
, Qt
);
7381 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7382 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7384 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7387 #if defined (DARWIN_OS)
7388 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7389 processes. As such, we only change the default value. */
7392 char const *release
= (STRINGP (Voperating_system_release
)
7393 ? SSDATA (Voperating_system_release
)
7395 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7396 Vprocess_connection_type
= Qnil
;
7400 #endif /* subprocesses */
7405 syms_of_process (void)
7409 DEFSYM (Qprocessp
, "processp");
7410 DEFSYM (Qrun
, "run");
7411 DEFSYM (Qstop
, "stop");
7412 DEFSYM (Qsignal
, "signal");
7414 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7417 Qexit = intern_c_string ("exit");
7418 staticpro (&Qexit); */
7420 DEFSYM (Qopen
, "open");
7421 DEFSYM (Qclosed
, "closed");
7422 DEFSYM (Qconnect
, "connect");
7423 DEFSYM (Qfailed
, "failed");
7424 DEFSYM (Qlisten
, "listen");
7425 DEFSYM (Qlocal
, "local");
7426 DEFSYM (Qipv4
, "ipv4");
7428 DEFSYM (Qipv6
, "ipv6");
7430 DEFSYM (Qdatagram
, "datagram");
7431 DEFSYM (Qseqpacket
, "seqpacket");
7433 DEFSYM (QCport
, ":port");
7434 DEFSYM (QCspeed
, ":speed");
7435 DEFSYM (QCprocess
, ":process");
7437 DEFSYM (QCbytesize
, ":bytesize");
7438 DEFSYM (QCstopbits
, ":stopbits");
7439 DEFSYM (QCparity
, ":parity");
7440 DEFSYM (Qodd
, "odd");
7441 DEFSYM (Qeven
, "even");
7442 DEFSYM (QCflowcontrol
, ":flowcontrol");
7445 DEFSYM (QCsummary
, ":summary");
7447 DEFSYM (Qreal
, "real");
7448 DEFSYM (Qnetwork
, "network");
7449 DEFSYM (Qserial
, "serial");
7450 DEFSYM (QCbuffer
, ":buffer");
7451 DEFSYM (QChost
, ":host");
7452 DEFSYM (QCservice
, ":service");
7453 DEFSYM (QClocal
, ":local");
7454 DEFSYM (QCremote
, ":remote");
7455 DEFSYM (QCcoding
, ":coding");
7456 DEFSYM (QCserver
, ":server");
7457 DEFSYM (QCnowait
, ":nowait");
7458 DEFSYM (QCsentinel
, ":sentinel");
7459 DEFSYM (QClog
, ":log");
7460 DEFSYM (QCnoquery
, ":noquery");
7461 DEFSYM (QCstop
, ":stop");
7462 DEFSYM (QCoptions
, ":options");
7463 DEFSYM (QCplist
, ":plist");
7465 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7467 staticpro (&Vprocess_alist
);
7469 staticpro (&deleted_pid_list
);
7472 #endif /* subprocesses */
7474 DEFSYM (QCname
, ":name");
7475 DEFSYM (QCtype
, ":type");
7477 DEFSYM (Qeuid
, "euid");
7478 DEFSYM (Qegid
, "egid");
7479 DEFSYM (Quser
, "user");
7480 DEFSYM (Qgroup
, "group");
7481 DEFSYM (Qcomm
, "comm");
7482 DEFSYM (Qstate
, "state");
7483 DEFSYM (Qppid
, "ppid");
7484 DEFSYM (Qpgrp
, "pgrp");
7485 DEFSYM (Qsess
, "sess");
7486 DEFSYM (Qttname
, "ttname");
7487 DEFSYM (Qtpgid
, "tpgid");
7488 DEFSYM (Qminflt
, "minflt");
7489 DEFSYM (Qmajflt
, "majflt");
7490 DEFSYM (Qcminflt
, "cminflt");
7491 DEFSYM (Qcmajflt
, "cmajflt");
7492 DEFSYM (Qutime
, "utime");
7493 DEFSYM (Qstime
, "stime");
7494 DEFSYM (Qtime
, "time");
7495 DEFSYM (Qcutime
, "cutime");
7496 DEFSYM (Qcstime
, "cstime");
7497 DEFSYM (Qctime
, "ctime");
7498 DEFSYM (Qpri
, "pri");
7499 DEFSYM (Qnice
, "nice");
7500 DEFSYM (Qthcount
, "thcount");
7501 DEFSYM (Qstart
, "start");
7502 DEFSYM (Qvsize
, "vsize");
7503 DEFSYM (Qrss
, "rss");
7504 DEFSYM (Qetime
, "etime");
7505 DEFSYM (Qpcpu
, "pcpu");
7506 DEFSYM (Qpmem
, "pmem");
7507 DEFSYM (Qargs
, "args");
7509 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7510 doc
: /* Non-nil means delete processes immediately when they exit.
7511 A value of nil means don't delete them until `list-processes' is run. */);
7513 delete_exited_processes
= 1;
7516 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7517 doc
: /* Control type of device used to communicate with subprocesses.
7518 Values are nil to use a pipe, or t or `pty' to use a pty.
7519 The value has no effect if the system has no ptys or if all ptys are busy:
7520 then a pipe is used in any case.
7521 The value takes effect when `start-process' is called. */);
7522 Vprocess_connection_type
= Qt
;
7524 #ifdef ADAPTIVE_READ_BUFFERING
7525 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7526 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7527 On some systems, when Emacs reads the output from a subprocess, the output data
7528 is read in very small blocks, potentially resulting in very poor performance.
7529 This behavior can be remedied to some extent by setting this variable to a
7530 non-nil value, as it will automatically delay reading from such processes, to
7531 allow them to produce more output before Emacs tries to read it.
7532 If the value is t, the delay is reset after each write to the process; any other
7533 non-nil value means that the delay is not reset on write.
7534 The variable takes effect when `start-process' is called. */);
7535 Vprocess_adaptive_read_buffering
= Qt
;
7538 defsubr (&Sprocessp
);
7539 defsubr (&Sget_process
);
7540 defsubr (&Sdelete_process
);
7541 defsubr (&Sprocess_status
);
7542 defsubr (&Sprocess_exit_status
);
7543 defsubr (&Sprocess_id
);
7544 defsubr (&Sprocess_name
);
7545 defsubr (&Sprocess_tty_name
);
7546 defsubr (&Sprocess_command
);
7547 defsubr (&Sset_process_buffer
);
7548 defsubr (&Sprocess_buffer
);
7549 defsubr (&Sprocess_mark
);
7550 defsubr (&Sset_process_filter
);
7551 defsubr (&Sprocess_filter
);
7552 defsubr (&Sset_process_sentinel
);
7553 defsubr (&Sprocess_sentinel
);
7554 defsubr (&Sset_process_window_size
);
7555 defsubr (&Sset_process_inherit_coding_system_flag
);
7556 defsubr (&Sset_process_query_on_exit_flag
);
7557 defsubr (&Sprocess_query_on_exit_flag
);
7558 defsubr (&Sprocess_contact
);
7559 defsubr (&Sprocess_plist
);
7560 defsubr (&Sset_process_plist
);
7561 defsubr (&Sprocess_list
);
7562 defsubr (&Sstart_process
);
7563 defsubr (&Sserial_process_configure
);
7564 defsubr (&Smake_serial_process
);
7565 defsubr (&Sset_network_process_option
);
7566 defsubr (&Smake_network_process
);
7567 defsubr (&Sformat_network_address
);
7568 #if defined (HAVE_NET_IF_H)
7570 defsubr (&Snetwork_interface_list
);
7572 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7573 defsubr (&Snetwork_interface_info
);
7575 #endif /* defined (HAVE_NET_IF_H) */
7576 #ifdef DATAGRAM_SOCKETS
7577 defsubr (&Sprocess_datagram_address
);
7578 defsubr (&Sset_process_datagram_address
);
7580 defsubr (&Saccept_process_output
);
7581 defsubr (&Sprocess_send_region
);
7582 defsubr (&Sprocess_send_string
);
7583 defsubr (&Sinterrupt_process
);
7584 defsubr (&Skill_process
);
7585 defsubr (&Squit_process
);
7586 defsubr (&Sstop_process
);
7587 defsubr (&Scontinue_process
);
7588 defsubr (&Sprocess_running_child_p
);
7589 defsubr (&Sprocess_send_eof
);
7590 defsubr (&Ssignal_process
);
7591 defsubr (&Swaiting_for_user_input_p
);
7592 defsubr (&Sprocess_type
);
7593 defsubr (&Sset_process_coding_system
);
7594 defsubr (&Sprocess_coding_system
);
7595 defsubr (&Sset_process_filter_multibyte
);
7596 defsubr (&Sprocess_filter_multibyte_p
);
7598 #endif /* subprocesses */
7600 defsubr (&Sget_buffer_process
);
7601 defsubr (&Sprocess_inherit_coding_system_flag
);
7602 defsubr (&Slist_system_processes
);
7603 defsubr (&Sprocess_attributes
);