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"
129 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
130 EMACS_TIME
*, void *);
135 # define waitpid(pid, status, options) wait (status)
141 /* Work around GCC 4.7.0 bug with strict overflow checking; see
142 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
143 These lines can be removed once the GCC bug is fixed. */
144 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
145 # pragma GCC diagnostic ignored "-Wstrict-overflow"
148 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
149 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
150 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
151 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
152 Lisp_Object QCname
, QCtype
;
154 /* Non-zero if keyboard input is on hold, zero otherwise. */
156 static int kbd_is_on_hold
;
158 /* Nonzero means don't run process sentinels. This is used
160 int inhibit_sentinels
;
164 Lisp_Object Qprocessp
;
165 static Lisp_Object Qrun
, Qstop
, Qsignal
;
166 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
168 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
169 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
171 static Lisp_Object Qipv6
;
173 static Lisp_Object QCport
, QCprocess
;
175 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
176 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
177 static Lisp_Object QCbuffer
, QChost
, QCservice
;
178 static Lisp_Object QClocal
, QCremote
, QCcoding
;
179 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
180 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
181 static Lisp_Object Qlast_nonmenu_event
;
183 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
184 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
185 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
186 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
192 /* Number of events of change of status of a process. */
193 static EMACS_INT process_tick
;
194 /* Number of events for which the user or sentinel has been notified. */
195 static EMACS_INT update_tick
;
197 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
199 /* Only W32 has this, it really means that select can't take write mask. */
200 #ifdef BROKEN_NON_BLOCKING_CONNECT
201 #undef NON_BLOCKING_CONNECT
202 #define SELECT_CANT_DO_WRITE_MASK
204 #ifndef NON_BLOCKING_CONNECT
206 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
207 #if defined (O_NONBLOCK) || defined (O_NDELAY)
208 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
209 #define NON_BLOCKING_CONNECT
210 #endif /* EWOULDBLOCK || EINPROGRESS */
211 #endif /* O_NONBLOCK || O_NDELAY */
212 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
213 #endif /* HAVE_SELECT */
214 #endif /* NON_BLOCKING_CONNECT */
215 #endif /* BROKEN_NON_BLOCKING_CONNECT */
217 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
218 this system. We need to read full packets, so we need a
219 "non-destructive" select. So we require either native select,
220 or emulation of select using FIONREAD. */
222 #ifndef BROKEN_DATAGRAM_SOCKETS
223 # if defined HAVE_SELECT || defined USABLE_FIONREAD
224 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
225 # define DATAGRAM_SOCKETS
230 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
231 # define HAVE_SEQPACKET
234 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
235 #define ADAPTIVE_READ_BUFFERING
238 #ifdef ADAPTIVE_READ_BUFFERING
239 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
240 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
241 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
243 /* Number of processes which have a non-zero read_output_delay,
244 and therefore might be delayed for adaptive read buffering. */
246 static int process_output_delay_count
;
248 /* Non-zero if any process has non-nil read_output_skip. */
250 static int process_output_skip
;
253 #define process_output_delay_count 0
256 static void create_process (Lisp_Object
, char **, Lisp_Object
);
258 static int keyboard_bit_set (SELECT_TYPE
*);
260 static void deactivate_process (Lisp_Object
);
261 static void status_notify (struct Lisp_Process
*);
262 static int read_process_output (Lisp_Object
, int);
263 static void handle_child_signal (int);
264 static void create_pty (Lisp_Object
);
266 /* If we support a window system, turn on the code to poll periodically
267 to detect C-g. It isn't actually used when doing interrupt input. */
268 #ifdef HAVE_WINDOW_SYSTEM
269 #define POLL_FOR_INPUT
272 static Lisp_Object
get_process (register Lisp_Object name
);
273 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
275 /* Mask of bits indicating the descriptors that we wait for input on. */
277 static SELECT_TYPE input_wait_mask
;
279 /* Mask that excludes keyboard input descriptor(s). */
281 static SELECT_TYPE non_keyboard_wait_mask
;
283 /* Mask that excludes process input descriptor(s). */
285 static SELECT_TYPE non_process_wait_mask
;
287 /* Mask for selecting for write. */
289 static SELECT_TYPE write_mask
;
291 #ifdef NON_BLOCKING_CONNECT
292 /* Mask of bits indicating the descriptors that we wait for connect to
293 complete on. Once they complete, they are removed from this mask
294 and added to the input_wait_mask and non_keyboard_wait_mask. */
296 static SELECT_TYPE connect_wait_mask
;
298 /* Number of bits set in connect_wait_mask. */
299 static int num_pending_connects
;
300 #endif /* NON_BLOCKING_CONNECT */
302 /* The largest descriptor currently in use for a process object. */
303 static int max_process_desc
;
305 /* The largest descriptor currently in use for input. */
306 static int max_input_desc
;
308 /* Indexed by descriptor, gives the process (if any) for that descriptor */
309 static Lisp_Object chan_process
[MAXDESC
];
311 /* Alist of elements (NAME . PROCESS) */
312 static Lisp_Object Vprocess_alist
;
314 /* Buffered-ahead input char from process, indexed by channel.
315 -1 means empty (no char is buffered).
316 Used on sys V where the only way to tell if there is any
317 output from the process is to read at least one char.
318 Always -1 on systems that support FIONREAD. */
320 static int proc_buffered_char
[MAXDESC
];
322 /* Table of `struct coding-system' for each process. */
323 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
324 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
326 #ifdef DATAGRAM_SOCKETS
327 /* Table of `partner address' for datagram sockets. */
328 static struct sockaddr_and_len
{
331 } datagram_address
[MAXDESC
];
332 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
333 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
335 #define DATAGRAM_CHAN_P(chan) (0)
336 #define DATAGRAM_CONN_P(proc) (0)
339 /* Maximum number of bytes to send to a pty without an eof. */
340 static int pty_max_bytes
;
342 /* These setters are used only in this file, so they can be private. */
344 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
349 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
354 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
356 p
->decode_coding_system
= val
;
359 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
361 p
->decoding_buf
= val
;
364 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
366 p
->encode_coding_system
= val
;
369 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
371 p
->encoding_buf
= val
;
374 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
379 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
384 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
389 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
394 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
399 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
404 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
409 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
414 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
419 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
421 p
->write_queue
= val
;
426 static struct fd_callback_data
432 int condition
; /* mask of the defines above. */
433 } fd_callback_info
[MAXDESC
];
436 /* Add a file descriptor FD to be monitored for when read is possible.
437 When read is possible, call FUNC with argument DATA. */
440 add_read_fd (int fd
, fd_callback func
, void *data
)
442 eassert (fd
< MAXDESC
);
443 add_keyboard_wait_descriptor (fd
);
445 fd_callback_info
[fd
].func
= func
;
446 fd_callback_info
[fd
].data
= data
;
447 fd_callback_info
[fd
].condition
|= FOR_READ
;
450 /* Stop monitoring file descriptor FD for when read is possible. */
453 delete_read_fd (int fd
)
455 eassert (fd
< MAXDESC
);
456 delete_keyboard_wait_descriptor (fd
);
458 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
459 if (fd_callback_info
[fd
].condition
== 0)
461 fd_callback_info
[fd
].func
= 0;
462 fd_callback_info
[fd
].data
= 0;
466 /* Add a file descriptor FD to be monitored for when write is possible.
467 When write is possible, call FUNC with argument DATA. */
470 add_write_fd (int fd
, fd_callback func
, void *data
)
472 eassert (fd
< MAXDESC
);
473 FD_SET (fd
, &write_mask
);
474 if (fd
> max_input_desc
)
477 fd_callback_info
[fd
].func
= func
;
478 fd_callback_info
[fd
].data
= data
;
479 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
482 /* Stop monitoring file descriptor FD for when write is possible. */
485 delete_write_fd (int fd
)
487 int lim
= max_input_desc
;
489 eassert (fd
< MAXDESC
);
490 FD_CLR (fd
, &write_mask
);
491 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
492 if (fd_callback_info
[fd
].condition
== 0)
494 fd_callback_info
[fd
].func
= 0;
495 fd_callback_info
[fd
].data
= 0;
497 if (fd
== max_input_desc
)
498 for (fd
= lim
; fd
>= 0; fd
--)
499 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
509 /* Compute the Lisp form of the process status, p->status, from
510 the numeric status that was returned by `wait'. */
512 static Lisp_Object
status_convert (int);
515 update_status (struct Lisp_Process
*p
)
517 eassert (p
->raw_status_new
);
518 pset_status (p
, status_convert (p
->raw_status
));
519 p
->raw_status_new
= 0;
522 /* Convert a process status word in Unix format to
523 the list that we use internally. */
526 status_convert (int w
)
529 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
530 else if (WIFEXITED (w
))
531 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
532 WCOREDUMP (w
) ? Qt
: Qnil
));
533 else if (WIFSIGNALED (w
))
534 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
535 WCOREDUMP (w
) ? Qt
: Qnil
));
540 /* Given a status-list, extract the three pieces of information
541 and store them individually through the three pointers. */
544 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
558 *code
= XFASTINT (XCAR (tem
));
560 *coredump
= !NILP (tem
);
564 /* Return a string describing a process status list. */
567 status_message (struct Lisp_Process
*p
)
569 Lisp_Object status
= p
->status
;
572 Lisp_Object string
, string2
;
574 decode_status (status
, &symbol
, &code
, &coredump
);
576 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
579 synchronize_system_messages_locale ();
580 signame
= strsignal (code
);
582 string
= build_string ("unknown");
587 string
= build_unibyte_string (signame
);
588 if (! NILP (Vlocale_coding_system
))
589 string
= (code_convert_string_norecord
590 (string
, Vlocale_coding_system
, 0));
591 c1
= STRING_CHAR (SDATA (string
));
594 Faset (string
, make_number (0), make_number (c2
));
596 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
597 return concat2 (string
, string2
);
599 else if (EQ (symbol
, Qexit
))
602 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
604 return build_string ("finished\n");
605 string
= Fnumber_to_string (make_number (code
));
606 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
607 return concat3 (build_string ("exited abnormally with code "),
610 else if (EQ (symbol
, Qfailed
))
612 string
= Fnumber_to_string (make_number (code
));
613 string2
= build_string ("\n");
614 return concat3 (build_string ("failed with code "),
618 return Fcopy_sequence (Fsymbol_name (symbol
));
623 /* The file name of the pty opened by allocate_pty. */
624 static char pty_name
[24];
626 /* Open an available pty, returning a file descriptor.
627 Return -1 on failure.
628 The file name of the terminal corresponding to the pty
629 is left in the variable pty_name. */
640 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
641 for (i
= 0; i
< 16; i
++)
644 #ifdef PTY_NAME_SPRINTF
647 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
648 #endif /* no PTY_NAME_SPRINTF */
652 #else /* no PTY_OPEN */
655 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
657 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
660 #endif /* no PTY_OPEN */
664 /* check to make certain that both sides are available
665 this avoids a nasty yet stupid bug in rlogins */
666 #ifdef PTY_TTY_NAME_SPRINTF
669 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
670 #endif /* no PTY_TTY_NAME_SPRINTF */
671 if (access (pty_name
, 6) != 0)
686 #endif /* HAVE_PTYS */
689 make_process (Lisp_Object name
)
691 register Lisp_Object val
, tem
, name1
;
692 register struct Lisp_Process
*p
;
693 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
696 p
= allocate_process ();
697 /* Initialize Lisp data. Note that allocate_process initializes all
698 Lisp data to nil, so do it only for slots which should not be nil. */
699 pset_status (p
, Qrun
);
700 pset_mark (p
, Fmake_marker ());
702 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
703 non-Lisp data, so do it only for slots which should not be zero. */
708 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
711 /* If name is already in use, modify it until it is unused. */
716 tem
= Fget_process (name1
);
717 if (NILP (tem
)) break;
718 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
722 XSETPROCESS (val
, p
);
723 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
728 remove_process (register Lisp_Object proc
)
730 register Lisp_Object pair
;
732 pair
= Frassq (proc
, Vprocess_alist
);
733 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
735 deactivate_process (proc
);
739 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
740 doc
: /* Return t if OBJECT is a process. */)
743 return PROCESSP (object
) ? Qt
: Qnil
;
746 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
747 doc
: /* Return the process named NAME, or nil if there is none. */)
748 (register Lisp_Object name
)
753 return Fcdr (Fassoc (name
, Vprocess_alist
));
756 /* This is how commands for the user decode process arguments. It
757 accepts a process, a process name, a buffer, a buffer name, or nil.
758 Buffers denote the first process in the buffer, and nil denotes the
762 get_process (register Lisp_Object name
)
764 register Lisp_Object proc
, obj
;
767 obj
= Fget_process (name
);
769 obj
= Fget_buffer (name
);
771 error ("Process %s does not exist", SDATA (name
));
773 else if (NILP (name
))
774 obj
= Fcurrent_buffer ();
778 /* Now obj should be either a buffer object or a process object.
782 proc
= Fget_buffer_process (obj
);
784 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
796 /* Fdelete_process promises to immediately forget about the process, but in
797 reality, Emacs needs to remember those processes until they have been
798 treated by the SIGCHLD handler; otherwise this handler would consider the
799 process as being synchronous and say that the synchronous process is
801 static Lisp_Object deleted_pid_list
;
804 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
805 doc
: /* Delete PROCESS: kill it and forget about it immediately.
806 PROCESS may be a process, a buffer, the name of a process or buffer, or
807 nil, indicating the current buffer's process. */)
808 (register Lisp_Object process
)
810 register struct Lisp_Process
*p
;
812 process
= get_process (process
);
813 p
= XPROCESS (process
);
815 p
->raw_status_new
= 0;
816 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
818 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
819 p
->tick
= ++process_tick
;
821 redisplay_preserve_echo_area (13);
823 else if (p
->infd
>= 0)
829 /* No problem storing the pid here, as it is still in Vprocess_alist. */
830 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
831 /* GC treated elements set to nil. */
832 Fdelq (Qnil
, deleted_pid_list
));
833 /* If the process has already signaled, remove it from the list. */
834 if (p
->raw_status_new
)
837 if (CONSP (p
->status
))
838 symbol
= XCAR (p
->status
);
839 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
841 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
845 Fkill_process (process
, Qnil
);
846 /* Do this now, since remove_process will make the
847 SIGCHLD handler do nothing. */
848 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
849 p
->tick
= ++process_tick
;
851 redisplay_preserve_echo_area (13);
854 remove_process (process
);
858 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
859 doc
: /* Return the status of PROCESS.
860 The returned value is one of the following symbols:
861 run -- for a process that is running.
862 stop -- for a process stopped but continuable.
863 exit -- for a process that has exited.
864 signal -- for a process that has got a fatal signal.
865 open -- for a network stream connection that is open.
866 listen -- for a network stream server that is listening.
867 closed -- for a network stream connection that is closed.
868 connect -- when waiting for a non-blocking connection to complete.
869 failed -- when a non-blocking connection has failed.
870 nil -- if arg is a process name and no such process exists.
871 PROCESS may be a process, a buffer, the name of a process, or
872 nil, indicating the current buffer's process. */)
873 (register Lisp_Object process
)
875 register struct Lisp_Process
*p
;
876 register Lisp_Object status
;
878 if (STRINGP (process
))
879 process
= Fget_process (process
);
881 process
= get_process (process
);
886 p
= XPROCESS (process
);
887 if (p
->raw_status_new
)
891 status
= XCAR (status
);
892 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
894 if (EQ (status
, Qexit
))
896 else if (EQ (p
->command
, Qt
))
898 else if (EQ (status
, Qrun
))
904 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
906 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
907 If PROCESS has not yet exited or died, return 0. */)
908 (register Lisp_Object process
)
910 CHECK_PROCESS (process
);
911 if (XPROCESS (process
)->raw_status_new
)
912 update_status (XPROCESS (process
));
913 if (CONSP (XPROCESS (process
)->status
))
914 return XCAR (XCDR (XPROCESS (process
)->status
));
915 return make_number (0);
918 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
919 doc
: /* Return the process id of PROCESS.
920 This is the pid of the external process which PROCESS uses or talks to.
921 For a network connection, this value is nil. */)
922 (register Lisp_Object process
)
926 CHECK_PROCESS (process
);
927 pid
= XPROCESS (process
)->pid
;
928 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
931 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
932 doc
: /* Return the name of PROCESS, as a string.
933 This is the name of the program invoked in PROCESS,
934 possibly modified to make it unique among process names. */)
935 (register Lisp_Object process
)
937 CHECK_PROCESS (process
);
938 return XPROCESS (process
)->name
;
941 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
942 doc
: /* Return the command that was executed to start PROCESS.
943 This is a list of strings, the first string being the program executed
944 and the rest of the strings being the arguments given to it.
945 For a network or serial process, this is nil (process is running) or t
946 \(process is stopped). */)
947 (register Lisp_Object process
)
949 CHECK_PROCESS (process
);
950 return XPROCESS (process
)->command
;
953 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
954 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
955 This is the terminal that the process itself reads and writes on,
956 not the name of the pty that Emacs uses to talk with that terminal. */)
957 (register Lisp_Object process
)
959 CHECK_PROCESS (process
);
960 return XPROCESS (process
)->tty_name
;
963 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
965 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
967 (register Lisp_Object process
, Lisp_Object buffer
)
969 struct Lisp_Process
*p
;
971 CHECK_PROCESS (process
);
973 CHECK_BUFFER (buffer
);
974 p
= XPROCESS (process
);
975 pset_buffer (p
, buffer
);
976 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
977 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
978 setup_process_coding_systems (process
);
982 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
984 doc
: /* Return the buffer PROCESS is associated with.
985 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
986 (register Lisp_Object process
)
988 CHECK_PROCESS (process
);
989 return XPROCESS (process
)->buffer
;
992 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
994 doc
: /* Return the marker for the end of the last output from PROCESS. */)
995 (register Lisp_Object process
)
997 CHECK_PROCESS (process
);
998 return XPROCESS (process
)->mark
;
1001 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1003 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1004 A value of t means stop accepting output from the process.
1006 When a process has a filter, its buffer is not used for output.
1007 Instead, each time it does output, the entire string of output is
1008 passed to the filter.
1010 The filter gets two arguments: the process and the string of output.
1011 The string argument is normally a multibyte string, except:
1012 - if the process' input coding system is no-conversion or raw-text,
1013 it is a unibyte string (the non-converted input), or else
1014 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1015 string (the result of converting the decoded input multibyte
1016 string to unibyte with `string-make-unibyte'). */)
1017 (register Lisp_Object process
, Lisp_Object filter
)
1019 struct Lisp_Process
*p
;
1021 CHECK_PROCESS (process
);
1022 p
= XPROCESS (process
);
1024 /* Don't signal an error if the process' input file descriptor
1025 is closed. This could make debugging Lisp more difficult,
1026 for example when doing something like
1028 (setq process (start-process ...))
1030 (set-process-filter process ...) */
1034 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1036 FD_CLR (p
->infd
, &input_wait_mask
);
1037 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1039 else if (EQ (p
->filter
, Qt
)
1040 /* Network or serial process not stopped: */
1041 && !EQ (p
->command
, Qt
))
1043 FD_SET (p
->infd
, &input_wait_mask
);
1044 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1048 pset_filter (p
, filter
);
1049 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1050 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1051 setup_process_coding_systems (process
);
1055 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1057 doc
: /* Returns the filter function of PROCESS; nil if none.
1058 See `set-process-filter' for more info on filter functions. */)
1059 (register Lisp_Object process
)
1061 CHECK_PROCESS (process
);
1062 return XPROCESS (process
)->filter
;
1065 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1067 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1068 The sentinel is called as a function when the process changes state.
1069 It gets two arguments: the process, and a string describing the change. */)
1070 (register Lisp_Object process
, Lisp_Object sentinel
)
1072 struct Lisp_Process
*p
;
1074 CHECK_PROCESS (process
);
1075 p
= XPROCESS (process
);
1077 pset_sentinel (p
, sentinel
);
1078 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1079 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1083 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1085 doc
: /* Return the sentinel of PROCESS; nil if none.
1086 See `set-process-sentinel' for more info on sentinels. */)
1087 (register Lisp_Object process
)
1089 CHECK_PROCESS (process
);
1090 return XPROCESS (process
)->sentinel
;
1093 DEFUN ("set-process-window-size", Fset_process_window_size
,
1094 Sset_process_window_size
, 3, 3, 0,
1095 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1096 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1098 CHECK_PROCESS (process
);
1099 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1100 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1102 if (XPROCESS (process
)->infd
< 0
1103 || set_window_size (XPROCESS (process
)->infd
,
1104 XINT (height
), XINT (width
)) <= 0)
1110 DEFUN ("set-process-inherit-coding-system-flag",
1111 Fset_process_inherit_coding_system_flag
,
1112 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1113 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1114 If the second argument FLAG is non-nil, then the variable
1115 `buffer-file-coding-system' of the buffer associated with PROCESS
1116 will be bound to the value of the coding system used to decode
1119 This is useful when the coding system specified for the process buffer
1120 leaves either the character code conversion or the end-of-line conversion
1121 unspecified, or if the coding system used to decode the process output
1122 is more appropriate for saving the process buffer.
1124 Binding the variable `inherit-process-coding-system' to non-nil before
1125 starting the process is an alternative way of setting the inherit flag
1126 for the process which will run.
1128 This function returns FLAG. */)
1129 (register Lisp_Object process
, Lisp_Object flag
)
1131 CHECK_PROCESS (process
);
1132 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1136 DEFUN ("set-process-query-on-exit-flag",
1137 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1139 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1140 If the second argument FLAG is non-nil, Emacs will query the user before
1141 exiting or killing a buffer if PROCESS is running. This function
1143 (register Lisp_Object process
, Lisp_Object flag
)
1145 CHECK_PROCESS (process
);
1146 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1150 DEFUN ("process-query-on-exit-flag",
1151 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1153 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1154 (register Lisp_Object process
)
1156 CHECK_PROCESS (process
);
1157 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1160 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1162 doc
: /* Return the contact info of PROCESS; t for a real child.
1163 For a network or serial connection, the value depends on the optional
1164 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1165 SERVICE) for a network connection or (PORT SPEED) for a serial
1166 connection. If KEY is t, the complete contact information for the
1167 connection is returned, else the specific value for the keyword KEY is
1168 returned. See `make-network-process' or `make-serial-process' for a
1169 list of keywords. */)
1170 (register Lisp_Object process
, Lisp_Object key
)
1172 Lisp_Object contact
;
1174 CHECK_PROCESS (process
);
1175 contact
= XPROCESS (process
)->childp
;
1177 #ifdef DATAGRAM_SOCKETS
1178 if (DATAGRAM_CONN_P (process
)
1179 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1180 contact
= Fplist_put (contact
, QCremote
,
1181 Fprocess_datagram_address (process
));
1184 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1186 if (NILP (key
) && NETCONN_P (process
))
1187 return Fcons (Fplist_get (contact
, QChost
),
1188 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1189 if (NILP (key
) && SERIALCONN_P (process
))
1190 return Fcons (Fplist_get (contact
, QCport
),
1191 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1192 return Fplist_get (contact
, key
);
1195 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1197 doc
: /* Return the plist of PROCESS. */)
1198 (register Lisp_Object process
)
1200 CHECK_PROCESS (process
);
1201 return XPROCESS (process
)->plist
;
1204 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1206 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1207 (register Lisp_Object process
, Lisp_Object plist
)
1209 CHECK_PROCESS (process
);
1212 pset_plist (XPROCESS (process
), plist
);
1216 #if 0 /* Turned off because we don't currently record this info
1217 in the process. Perhaps add it. */
1218 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1219 doc
: /* Return the connection type of PROCESS.
1220 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1221 a socket connection. */)
1222 (Lisp_Object process
)
1224 return XPROCESS (process
)->type
;
1228 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1229 doc
: /* Return the connection type of PROCESS.
1230 The value is either the symbol `real', `network', or `serial'.
1231 PROCESS may be a process, a buffer, the name of a process or buffer, or
1232 nil, indicating the current buffer's process. */)
1233 (Lisp_Object process
)
1236 proc
= get_process (process
);
1237 return XPROCESS (proc
)->type
;
1240 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1242 doc
: /* Convert network ADDRESS from internal format to a string.
1243 A 4 or 5 element vector represents an IPv4 address (with port number).
1244 An 8 or 9 element vector represents an IPv6 address (with port number).
1245 If optional second argument OMIT-PORT is non-nil, don't include a port
1246 number in the string, even when present in ADDRESS.
1247 Returns nil if format of ADDRESS is invalid. */)
1248 (Lisp_Object address
, Lisp_Object omit_port
)
1253 if (STRINGP (address
)) /* AF_LOCAL */
1256 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1258 register struct Lisp_Vector
*p
= XVECTOR (address
);
1259 ptrdiff_t size
= p
->header
.size
;
1260 Lisp_Object args
[10];
1263 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1265 args
[0] = build_string ("%d.%d.%d.%d");
1270 args
[0] = build_string ("%d.%d.%d.%d:%d");
1273 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1275 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1280 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1286 for (i
= 0; i
< nargs
; i
++)
1288 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1291 if (nargs
<= 5 /* IPv4 */
1292 && i
< 4 /* host, not port */
1293 && XINT (p
->contents
[i
]) > 255)
1296 args
[i
+1] = p
->contents
[i
];
1299 return Fformat (nargs
+1, args
);
1302 if (CONSP (address
))
1304 Lisp_Object args
[2];
1305 args
[0] = build_string ("<Family %d>");
1306 args
[1] = Fcar (address
);
1307 return Fformat (2, args
);
1313 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1314 doc
: /* Return a list of all processes. */)
1317 return Fmapcar (Qcdr
, Vprocess_alist
);
1320 /* Starting asynchronous inferior processes. */
1322 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1324 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1325 doc
: /* Start a program in a subprocess. Return the process object for it.
1326 NAME is name for process. It is modified if necessary to make it unique.
1327 BUFFER is the buffer (or buffer name) to associate with the process.
1329 Process output (both standard output and standard error streams) goes
1330 at end of BUFFER, unless you specify an output stream or filter
1331 function to handle the output. BUFFER may also be nil, meaning that
1332 this process is not associated with any buffer.
1334 PROGRAM is the program file name. It is searched for in `exec-path'
1335 (which see). If nil, just associate a pty with the buffer. Remaining
1336 arguments are strings to give program as arguments.
1338 If you want to separate standard output from standard error, invoke
1339 the command through a shell and redirect one of them using the shell
1342 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1343 (ptrdiff_t nargs
, Lisp_Object
*args
)
1345 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1346 register unsigned char **new_argv
;
1348 ptrdiff_t count
= SPECPDL_INDEX ();
1352 buffer
= Fget_buffer_create (buffer
);
1354 /* Make sure that the child will be able to chdir to the current
1355 buffer's current directory, or its unhandled equivalent. We
1356 can't just have the child check for an error when it does the
1357 chdir, since it's in a vfork.
1359 We have to GCPRO around this because Fexpand_file_name and
1360 Funhandled_file_name_directory might call a file name handling
1361 function. The argument list is protected by the caller, so all
1362 we really have to worry about is buffer. */
1364 struct gcpro gcpro1
, gcpro2
;
1366 current_dir
= BVAR (current_buffer
, directory
);
1368 GCPRO2 (buffer
, current_dir
);
1370 current_dir
= Funhandled_file_name_directory (current_dir
);
1371 if (NILP (current_dir
))
1372 /* If the file name handler says that current_dir is unreachable, use
1373 a sensible default. */
1374 current_dir
= build_string ("~/");
1375 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1376 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1377 report_file_error ("Setting current directory",
1378 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1384 CHECK_STRING (name
);
1388 if (!NILP (program
))
1389 CHECK_STRING (program
);
1391 proc
= make_process (name
);
1392 /* If an error occurs and we can't start the process, we want to
1393 remove it from the process list. This means that each error
1394 check in create_process doesn't need to call remove_process
1395 itself; it's all taken care of here. */
1396 record_unwind_protect (start_process_unwind
, proc
);
1398 pset_childp (XPROCESS (proc
), Qt
);
1399 pset_plist (XPROCESS (proc
), Qnil
);
1400 pset_type (XPROCESS (proc
), Qreal
);
1401 pset_buffer (XPROCESS (proc
), buffer
);
1402 pset_sentinel (XPROCESS (proc
), Qnil
);
1403 pset_filter (XPROCESS (proc
), Qnil
);
1404 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1407 /* AKA GNUTLS_INITSTAGE(proc). */
1408 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1409 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1412 #ifdef ADAPTIVE_READ_BUFFERING
1413 XPROCESS (proc
)->adaptive_read_buffering
1414 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1415 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1418 /* Make the process marker point into the process buffer (if any). */
1419 if (BUFFERP (buffer
))
1420 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1421 BUF_ZV (XBUFFER (buffer
)),
1422 BUF_ZV_BYTE (XBUFFER (buffer
)));
1425 /* Decide coding systems for communicating with the process. Here
1426 we don't setup the structure coding_system nor pay attention to
1427 unibyte mode. They are done in create_process. */
1429 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1430 Lisp_Object coding_systems
= Qt
;
1431 Lisp_Object val
, *args2
;
1432 struct gcpro gcpro1
, gcpro2
;
1434 val
= Vcoding_system_for_read
;
1437 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1438 args2
[0] = Qstart_process
;
1439 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1440 GCPRO2 (proc
, current_dir
);
1441 if (!NILP (program
))
1442 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1444 if (CONSP (coding_systems
))
1445 val
= XCAR (coding_systems
);
1446 else if (CONSP (Vdefault_process_coding_system
))
1447 val
= XCAR (Vdefault_process_coding_system
);
1449 pset_decode_coding_system (XPROCESS (proc
), val
);
1451 val
= Vcoding_system_for_write
;
1454 if (EQ (coding_systems
, Qt
))
1456 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1457 args2
[0] = Qstart_process
;
1458 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1459 GCPRO2 (proc
, current_dir
);
1460 if (!NILP (program
))
1461 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1464 if (CONSP (coding_systems
))
1465 val
= XCDR (coding_systems
);
1466 else if (CONSP (Vdefault_process_coding_system
))
1467 val
= XCDR (Vdefault_process_coding_system
);
1469 pset_encode_coding_system (XPROCESS (proc
), val
);
1470 /* Note: At this moment, the above coding system may leave
1471 text-conversion or eol-conversion unspecified. They will be
1472 decided after we read output from the process and decode it by
1473 some coding system, or just before we actually send a text to
1478 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1479 XPROCESS (proc
)->decoding_carryover
= 0;
1480 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1482 XPROCESS (proc
)->inherit_coding_system_flag
1483 = !(NILP (buffer
) || !inherit_process_coding_system
);
1485 if (!NILP (program
))
1487 /* If program file name is not absolute, search our path for it.
1488 Put the name we will really use in TEM. */
1489 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1490 && !(SCHARS (program
) > 1
1491 && IS_DEVICE_SEP (SREF (program
, 1))))
1493 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1496 GCPRO4 (name
, program
, buffer
, current_dir
);
1497 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1500 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1501 tem
= Fexpand_file_name (tem
, Qnil
);
1505 if (!NILP (Ffile_directory_p (program
)))
1506 error ("Specified program for new process is a directory");
1510 /* If program file name starts with /: for quoting a magic name,
1512 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1513 && SREF (tem
, 1) == ':')
1514 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1517 Lisp_Object arg_encoding
= Qnil
;
1518 struct gcpro gcpro1
;
1521 /* Encode the file name and put it in NEW_ARGV.
1522 That's where the child will use it to execute the program. */
1523 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1525 /* Here we encode arguments by the coding system used for sending
1526 data to the process. We don't support using different coding
1527 systems for encoding arguments and for encoding data sent to the
1530 for (i
= 3; i
< nargs
; i
++)
1532 tem
= Fcons (args
[i
], tem
);
1533 CHECK_STRING (XCAR (tem
));
1534 if (STRING_MULTIBYTE (XCAR (tem
)))
1536 if (NILP (arg_encoding
))
1537 arg_encoding
= (complement_process_encoding_system
1538 (XPROCESS (proc
)->encode_coding_system
));
1540 code_convert_string_norecord
1541 (XCAR (tem
), arg_encoding
, 1));
1548 /* Now that everything is encoded we can collect the strings into
1550 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1551 new_argv
[nargs
- 2] = 0;
1553 for (i
= nargs
- 2; i
-- != 0; )
1555 new_argv
[i
] = SDATA (XCAR (tem
));
1559 create_process (proc
, (char **) new_argv
, current_dir
);
1564 return unbind_to (count
, proc
);
1567 /* This function is the unwind_protect form for Fstart_process. If
1568 PROC doesn't have its pid set, then we know someone has signaled
1569 an error and the process wasn't started successfully, so we should
1570 remove it from the process list. */
1572 start_process_unwind (Lisp_Object proc
)
1574 if (!PROCESSP (proc
))
1577 /* Was PROC started successfully?
1578 -2 is used for a pty with no process, eg for gdb. */
1579 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1580 remove_process (proc
);
1586 create_process_1 (struct atimer
*timer
)
1588 /* Nothing to do. */
1593 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1595 int inchannel
, outchannel
;
1598 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1599 int wait_child_setup
[2];
1604 /* Use volatile to protect variables from being clobbered by vfork. */
1605 volatile int forkin
, forkout
;
1606 volatile int pty_flag
= 0;
1607 volatile Lisp_Object lisp_pty_name
= Qnil
;
1608 volatile Lisp_Object encoded_current_dir
;
1609 #if HAVE_WORKING_VFORK
1610 char **volatile save_environ
;
1613 inchannel
= outchannel
= -1;
1616 if (!NILP (Vprocess_connection_type
))
1617 outchannel
= inchannel
= allocate_pty ();
1621 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1622 /* On most USG systems it does not work to open the pty's tty here,
1623 then close it and reopen it in the child. */
1625 /* Don't let this terminal become our controlling terminal
1626 (in case we don't have one). */
1627 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1629 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1632 report_file_error ("Opening pty", Qnil
);
1634 forkin
= forkout
= -1;
1635 #endif /* not USG, or USG_SUBTTY_WORKS */
1637 lisp_pty_name
= build_string (pty_name
);
1640 #endif /* HAVE_PTYS */
1645 report_file_error ("Creating pipe", Qnil
);
1651 emacs_close (inchannel
);
1652 emacs_close (forkout
);
1653 report_file_error ("Creating pipe", Qnil
);
1659 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1663 tem
= pipe (wait_child_setup
);
1665 report_file_error ("Creating pipe", Qnil
);
1666 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1668 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1671 emacs_close (wait_child_setup
[0]);
1672 emacs_close (wait_child_setup
[1]);
1673 report_file_error ("Setting file descriptor flags", Qnil
);
1679 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1680 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1683 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1684 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1688 /* Record this as an active process, with its channels.
1689 As a result, child_setup will close Emacs's side of the pipes. */
1690 chan_process
[inchannel
] = process
;
1691 XPROCESS (process
)->infd
= inchannel
;
1692 XPROCESS (process
)->outfd
= outchannel
;
1694 /* Previously we recorded the tty descriptor used in the subprocess.
1695 It was only used for getting the foreground tty process, so now
1696 we just reopen the device (see emacs_get_tty_pgrp) as this is
1697 more portable (see USG_SUBTTY_WORKS above). */
1699 XPROCESS (process
)->pty_flag
= pty_flag
;
1700 pset_status (XPROCESS (process
), Qrun
);
1702 FD_SET (inchannel
, &input_wait_mask
);
1703 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1704 if (inchannel
> max_process_desc
)
1705 max_process_desc
= inchannel
;
1707 /* Until we store the proper pid, enable the SIGCHLD handler
1708 to recognize an unknown pid as standing for this process.
1709 It is very important not to let this `marker' value stay
1710 in the table after this function has returned; if it does
1711 it might cause call-process to hang and subsequent asynchronous
1712 processes to get their return values scrambled. */
1713 XPROCESS (process
)->pid
= -1;
1715 /* This must be called after the above line because it may signal an
1717 setup_process_coding_systems (process
);
1719 encoded_current_dir
= ENCODE_FILE (current_dir
);
1724 /* Block SIGCHLD until we have a chance to store the new fork's
1725 pid in its process structure. */
1726 sigemptyset (&blocked
);
1727 sigaddset (&blocked
, SIGCHLD
);
1728 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1731 #if HAVE_WORKING_VFORK
1732 /* child_setup must clobber environ on systems with true vfork.
1733 Protect it from permanent change. */
1734 save_environ
= environ
;
1740 #endif /* not WINDOWSNT */
1742 int xforkin
= forkin
;
1743 int xforkout
= forkout
;
1745 /* Make the pty be the controlling terminal of the process. */
1747 /* First, disconnect its current controlling terminal. */
1749 /* We tried doing setsid only if pty_flag, but it caused
1750 process_set_signal to fail on SGI when using a pipe. */
1752 /* Make the pty's terminal the controlling terminal. */
1753 if (pty_flag
&& xforkin
>= 0)
1756 /* We ignore the return value
1757 because faith@cs.unc.edu says that is necessary on Linux. */
1758 ioctl (xforkin
, TIOCSCTTY
, 0);
1761 #else /* not HAVE_SETSID */
1762 /* It's very important to call setpgid here and no time
1763 afterwards. Otherwise, we lose our controlling tty which
1764 is set when we open the pty. */
1766 #endif /* not HAVE_SETSID */
1767 #if defined (LDISC1)
1768 if (pty_flag
&& xforkin
>= 0)
1771 tcgetattr (xforkin
, &t
);
1773 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1774 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1777 #if defined (NTTYDISC) && defined (TIOCSETD)
1778 if (pty_flag
&& xforkin
>= 0)
1780 /* Use new line discipline. */
1781 int ldisc
= NTTYDISC
;
1782 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1787 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1788 can do TIOCSPGRP only to the process's controlling tty. */
1791 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1792 I can't test it since I don't have 4.3. */
1793 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1796 ioctl (j
, TIOCNOTTY
, 0);
1800 /* In order to get a controlling terminal on some versions
1801 of BSD, it is necessary to put the process in pgrp 0
1802 before it opens the terminal. */
1806 #endif /* TIOCNOTTY */
1808 #if !defined (DONT_REOPEN_PTY)
1809 /*** There is a suggestion that this ought to be a
1810 conditional on TIOCSPGRP,
1811 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1812 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1813 that system does seem to need this code, even though
1814 both HAVE_SETSID and TIOCSCTTY are defined. */
1815 /* Now close the pty (if we had it open) and reopen it.
1816 This makes the pty the controlling terminal of the subprocess. */
1820 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1823 emacs_close (xforkin
);
1824 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1828 emacs_write (1, "Couldn't open the pty terminal ", 31);
1829 emacs_write (1, pty_name
, strlen (pty_name
));
1830 emacs_write (1, "\n", 1);
1835 #endif /* not DONT_REOPEN_PTY */
1837 #ifdef SETUP_SLAVE_PTY
1842 #endif /* SETUP_SLAVE_PTY */
1844 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1845 Now reenable it in the child, so it will die when we want it to. */
1847 signal (SIGHUP
, SIG_DFL
);
1849 #endif /* HAVE_PTYS */
1851 signal (SIGINT
, SIG_DFL
);
1852 signal (SIGQUIT
, SIG_DFL
);
1854 /* Emacs ignores SIGPIPE, but the child should not. */
1855 signal (SIGPIPE
, SIG_DFL
);
1858 /* Stop blocking signals in the child. */
1859 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1863 child_setup_tty (xforkout
);
1865 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1866 new_argv
, 1, encoded_current_dir
);
1867 #else /* not WINDOWSNT */
1869 emacs_close (wait_child_setup
[0]);
1871 child_setup (xforkin
, xforkout
, xforkout
,
1872 new_argv
, 1, encoded_current_dir
);
1873 #endif /* not WINDOWSNT */
1876 /* Back in the parent process. */
1878 #if HAVE_WORKING_VFORK
1879 environ
= save_environ
;
1882 XPROCESS (process
)->pid
= pid
;
1884 /* Stop blocking signals in the parent. */
1886 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1893 emacs_close (forkin
);
1894 if (forkin
!= forkout
&& forkout
>= 0)
1895 emacs_close (forkout
);
1899 /* vfork succeeded. */
1902 register_child (pid
, inchannel
);
1903 #endif /* WINDOWSNT */
1905 /* If the subfork execv fails, and it exits,
1906 this close hangs. I don't know why.
1907 So have an interrupt jar it loose. */
1909 struct atimer
*timer
;
1910 EMACS_TIME offset
= make_emacs_time (1, 0);
1913 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1916 emacs_close (forkin
);
1918 cancel_atimer (timer
);
1922 if (forkin
!= forkout
&& forkout
>= 0)
1923 emacs_close (forkout
);
1925 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1927 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1928 /* Wait for child_setup to complete in case that vfork is
1929 actually defined as fork. The descriptor wait_child_setup[1]
1930 of a pipe is closed at the child side either by close-on-exec
1931 on successful execvp or the _exit call in child_setup. */
1935 emacs_close (wait_child_setup
[1]);
1936 emacs_read (wait_child_setup
[0], &dummy
, 1);
1937 emacs_close (wait_child_setup
[0]);
1942 /* Now generate the error if vfork failed. */
1944 report_file_error ("Doing vfork", Qnil
);
1948 create_pty (Lisp_Object process
)
1950 int inchannel
, outchannel
;
1953 inchannel
= outchannel
= -1;
1956 if (!NILP (Vprocess_connection_type
))
1957 outchannel
= inchannel
= allocate_pty ();
1961 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1962 /* On most USG systems it does not work to open the pty's tty here,
1963 then close it and reopen it in the child. */
1965 /* Don't let this terminal become our controlling terminal
1966 (in case we don't have one). */
1967 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1969 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1972 report_file_error ("Opening pty", Qnil
);
1973 #if defined (DONT_REOPEN_PTY)
1974 /* In the case that vfork is defined as fork, the parent process
1975 (Emacs) may send some data before the child process completes
1976 tty options setup. So we setup tty before forking. */
1977 child_setup_tty (forkout
);
1978 #endif /* DONT_REOPEN_PTY */
1979 #endif /* not USG, or USG_SUBTTY_WORKS */
1982 #endif /* HAVE_PTYS */
1985 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1986 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1989 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1990 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1994 /* Record this as an active process, with its channels.
1995 As a result, child_setup will close Emacs's side of the pipes. */
1996 chan_process
[inchannel
] = process
;
1997 XPROCESS (process
)->infd
= inchannel
;
1998 XPROCESS (process
)->outfd
= outchannel
;
2000 /* Previously we recorded the tty descriptor used in the subprocess.
2001 It was only used for getting the foreground tty process, so now
2002 we just reopen the device (see emacs_get_tty_pgrp) as this is
2003 more portable (see USG_SUBTTY_WORKS above). */
2005 XPROCESS (process
)->pty_flag
= pty_flag
;
2006 pset_status (XPROCESS (process
), Qrun
);
2007 setup_process_coding_systems (process
);
2009 FD_SET (inchannel
, &input_wait_mask
);
2010 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2011 if (inchannel
> max_process_desc
)
2012 max_process_desc
= inchannel
;
2014 XPROCESS (process
)->pid
= -2;
2017 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2020 pset_tty_name (XPROCESS (process
), Qnil
);
2024 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2025 The address family of sa is not included in the result. */
2028 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2030 Lisp_Object address
;
2033 register struct Lisp_Vector
*p
;
2035 /* Workaround for a bug in getsockname on BSD: Names bound to
2036 sockets in the UNIX domain are inaccessible; getsockname returns
2037 a zero length name. */
2038 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2039 return empty_unibyte_string
;
2041 switch (sa
->sa_family
)
2045 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2046 len
= sizeof (sin
->sin_addr
) + 1;
2047 address
= Fmake_vector (make_number (len
), Qnil
);
2048 p
= XVECTOR (address
);
2049 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2050 cp
= (unsigned char *) &sin
->sin_addr
;
2056 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2057 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2058 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2059 address
= Fmake_vector (make_number (len
), Qnil
);
2060 p
= XVECTOR (address
);
2061 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2062 for (i
= 0; i
< len
; i
++)
2063 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2067 #ifdef HAVE_LOCAL_SOCKETS
2070 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2071 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2072 if (sockun
->sun_path
[i
] == 0)
2074 return make_unibyte_string (sockun
->sun_path
, i
);
2078 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2079 address
= Fcons (make_number (sa
->sa_family
),
2080 Fmake_vector (make_number (len
), Qnil
));
2081 p
= XVECTOR (XCDR (address
));
2082 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2088 p
->contents
[i
++] = make_number (*cp
++);
2094 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2097 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2099 register struct Lisp_Vector
*p
;
2101 if (VECTORP (address
))
2103 p
= XVECTOR (address
);
2104 if (p
->header
.size
== 5)
2107 return sizeof (struct sockaddr_in
);
2110 else if (p
->header
.size
== 9)
2112 *familyp
= AF_INET6
;
2113 return sizeof (struct sockaddr_in6
);
2117 #ifdef HAVE_LOCAL_SOCKETS
2118 else if (STRINGP (address
))
2120 *familyp
= AF_LOCAL
;
2121 return sizeof (struct sockaddr_un
);
2124 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2125 && VECTORP (XCDR (address
)))
2127 struct sockaddr
*sa
;
2128 *familyp
= XINT (XCAR (address
));
2129 p
= XVECTOR (XCDR (address
));
2130 return p
->header
.size
+ sizeof (sa
->sa_family
);
2135 /* Convert an address object (vector or string) to an internal sockaddr.
2137 The address format has been basically validated by
2138 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2139 it could have come from user data. So if FAMILY is not valid,
2140 we return after zeroing *SA. */
2143 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2145 register struct Lisp_Vector
*p
;
2146 register unsigned char *cp
= NULL
;
2150 memset (sa
, 0, len
);
2152 if (VECTORP (address
))
2154 p
= XVECTOR (address
);
2155 if (family
== AF_INET
)
2157 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2158 len
= sizeof (sin
->sin_addr
) + 1;
2159 hostport
= XINT (p
->contents
[--len
]);
2160 sin
->sin_port
= htons (hostport
);
2161 cp
= (unsigned char *)&sin
->sin_addr
;
2162 sa
->sa_family
= family
;
2165 else if (family
== AF_INET6
)
2167 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2168 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2169 len
= sizeof (sin6
->sin6_addr
) + 1;
2170 hostport
= XINT (p
->contents
[--len
]);
2171 sin6
->sin6_port
= htons (hostport
);
2172 for (i
= 0; i
< len
; i
++)
2173 if (INTEGERP (p
->contents
[i
]))
2175 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2178 sa
->sa_family
= family
;
2185 else if (STRINGP (address
))
2187 #ifdef HAVE_LOCAL_SOCKETS
2188 if (family
== AF_LOCAL
)
2190 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2191 cp
= SDATA (address
);
2192 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2193 sockun
->sun_path
[i
] = *cp
++;
2194 sa
->sa_family
= family
;
2201 p
= XVECTOR (XCDR (address
));
2202 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2205 for (i
= 0; i
< len
; i
++)
2206 if (INTEGERP (p
->contents
[i
]))
2207 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2210 #ifdef DATAGRAM_SOCKETS
2211 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2213 doc
: /* Get the current datagram address associated with PROCESS. */)
2214 (Lisp_Object process
)
2218 CHECK_PROCESS (process
);
2220 if (!DATAGRAM_CONN_P (process
))
2223 channel
= XPROCESS (process
)->infd
;
2224 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2225 datagram_address
[channel
].len
);
2228 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2230 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2231 Returns nil upon error setting address, ADDRESS otherwise. */)
2232 (Lisp_Object process
, Lisp_Object address
)
2237 CHECK_PROCESS (process
);
2239 if (!DATAGRAM_CONN_P (process
))
2242 channel
= XPROCESS (process
)->infd
;
2244 len
= get_lisp_to_sockaddr_size (address
, &family
);
2245 if (datagram_address
[channel
].len
!= len
)
2247 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2253 static const struct socket_options
{
2254 /* The name of this option. Should be lowercase version of option
2255 name without SO_ prefix. */
2257 /* Option level SOL_... */
2259 /* Option number SO_... */
2261 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2262 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2263 } socket_options
[] =
2265 #ifdef SO_BINDTODEVICE
2266 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2269 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2272 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2275 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2278 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2281 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2284 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2287 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2289 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2292 /* Set option OPT to value VAL on socket S.
2294 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2295 Signals an error if setting a known option fails.
2299 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2302 const struct socket_options
*sopt
;
2307 name
= SSDATA (SYMBOL_NAME (opt
));
2308 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2309 if (strcmp (name
, sopt
->name
) == 0)
2312 switch (sopt
->opttype
)
2317 optval
= NILP (val
) ? 0 : 1;
2318 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2319 &optval
, sizeof (optval
));
2326 if (TYPE_RANGED_INTEGERP (int, val
))
2327 optval
= XINT (val
);
2329 error ("Bad option value for %s", name
);
2330 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2331 &optval
, sizeof (optval
));
2335 #ifdef SO_BINDTODEVICE
2338 char devname
[IFNAMSIZ
+1];
2340 /* This is broken, at least in the Linux 2.4 kernel.
2341 To unbind, the arg must be a zero integer, not the empty string.
2342 This should work on all systems. KFS. 2003-09-23. */
2343 memset (devname
, 0, sizeof devname
);
2346 char *arg
= SSDATA (val
);
2347 int len
= min (strlen (arg
), IFNAMSIZ
);
2348 memcpy (devname
, arg
, len
);
2350 else if (!NILP (val
))
2351 error ("Bad option value for %s", name
);
2352 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2361 struct linger linger
;
2364 linger
.l_linger
= 0;
2365 if (TYPE_RANGED_INTEGERP (int, val
))
2366 linger
.l_linger
= XINT (val
);
2368 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2369 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2370 &linger
, sizeof (linger
));
2380 report_file_error ("Cannot set network option",
2381 Fcons (opt
, Fcons (val
, Qnil
)));
2382 return (1 << sopt
->optbit
);
2386 DEFUN ("set-network-process-option",
2387 Fset_network_process_option
, Sset_network_process_option
,
2389 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2390 See `make-network-process' for a list of options and values.
2391 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2392 OPTION is not a supported option, return nil instead; otherwise return t. */)
2393 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2396 struct Lisp_Process
*p
;
2398 CHECK_PROCESS (process
);
2399 p
= XPROCESS (process
);
2400 if (!NETCONN1_P (p
))
2401 error ("Process is not a network process");
2405 error ("Process is not running");
2407 if (set_socket_option (s
, option
, value
))
2409 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2413 if (NILP (no_error
))
2414 error ("Unknown or unsupported option");
2420 DEFUN ("serial-process-configure",
2421 Fserial_process_configure
,
2422 Sserial_process_configure
,
2424 doc
: /* Configure speed, bytesize, etc. of a serial process.
2426 Arguments are specified as keyword/argument pairs. Attributes that
2427 are not given are re-initialized from the process's current
2428 configuration (available via the function `process-contact') or set to
2429 reasonable default values. The following arguments are defined:
2435 -- Any of these arguments can be given to identify the process that is
2436 to be configured. If none of these arguments is given, the current
2437 buffer's process is used.
2439 :speed SPEED -- SPEED is the speed of the serial port in bits per
2440 second, also called baud rate. Any value can be given for SPEED, but
2441 most serial ports work only at a few defined values between 1200 and
2442 115200, with 9600 being the most common value. If SPEED is nil, the
2443 serial port is not configured any further, i.e., all other arguments
2444 are ignored. This may be useful for special serial ports such as
2445 Bluetooth-to-serial converters which can only be configured through AT
2446 commands. A value of nil for SPEED can be used only when passed
2447 through `make-serial-process' or `serial-term'.
2449 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2450 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2452 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2453 `odd' (use odd parity), or the symbol `even' (use even parity). If
2454 PARITY is not given, no parity is used.
2456 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2457 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2458 is not given or nil, 1 stopbit is used.
2460 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2461 flowcontrol to be used, which is either nil (don't use flowcontrol),
2462 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2463 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2464 flowcontrol is used.
2466 `serial-process-configure' is called by `make-serial-process' for the
2467 initial configuration of the serial port.
2471 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2473 \(serial-process-configure
2474 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2476 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2478 usage: (serial-process-configure &rest ARGS) */)
2479 (ptrdiff_t nargs
, Lisp_Object
*args
)
2481 struct Lisp_Process
*p
;
2482 Lisp_Object contact
= Qnil
;
2483 Lisp_Object proc
= Qnil
;
2484 struct gcpro gcpro1
;
2486 contact
= Flist (nargs
, args
);
2489 proc
= Fplist_get (contact
, QCprocess
);
2491 proc
= Fplist_get (contact
, QCname
);
2493 proc
= Fplist_get (contact
, QCbuffer
);
2495 proc
= Fplist_get (contact
, QCport
);
2496 proc
= get_process (proc
);
2497 p
= XPROCESS (proc
);
2498 if (!EQ (p
->type
, Qserial
))
2499 error ("Not a serial process");
2501 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2507 serial_configure (p
, contact
);
2513 /* Used by make-serial-process to recover from errors. */
2515 make_serial_process_unwind (Lisp_Object proc
)
2517 if (!PROCESSP (proc
))
2519 remove_process (proc
);
2523 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2525 doc
: /* Create and return a serial port process.
2527 In Emacs, serial port connections are represented by process objects,
2528 so input and output work as for subprocesses, and `delete-process'
2529 closes a serial port connection. However, a serial process has no
2530 process id, it cannot be signaled, and the status codes are different
2531 from normal processes.
2533 `make-serial-process' creates a process and a buffer, on which you
2534 probably want to use `process-send-string'. Try \\[serial-term] for
2535 an interactive terminal. See below for examples.
2537 Arguments are specified as keyword/argument pairs. The following
2538 arguments are defined:
2540 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2541 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2542 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2543 the backslashes in strings).
2545 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2546 which this function calls.
2548 :name NAME -- NAME is the name of the process. If NAME is not given,
2549 the value of PORT is used.
2551 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2552 with the process. Process output goes at the end of that buffer,
2553 unless you specify an output stream or filter function to handle the
2554 output. If BUFFER is not given, the value of NAME is used.
2556 :coding CODING -- If CODING is a symbol, it specifies the coding
2557 system used for both reading and writing for this process. If CODING
2558 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2559 ENCODING is used for writing.
2561 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2562 the process is running. If BOOL is not given, query before exiting.
2564 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2565 In the stopped state, a serial process does not accept incoming data,
2566 but you can send outgoing data. The stopped state is cleared by
2567 `continue-process' and set by `stop-process'.
2569 :filter FILTER -- Install FILTER as the process filter.
2571 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2573 :plist PLIST -- Install PLIST as the initial plist of the process.
2579 -- This function calls `serial-process-configure' to handle these
2582 The original argument list, possibly modified by later configuration,
2583 is available via the function `process-contact'.
2587 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2589 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2591 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2593 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2595 usage: (make-serial-process &rest ARGS) */)
2596 (ptrdiff_t nargs
, Lisp_Object
*args
)
2599 Lisp_Object proc
, contact
, port
;
2600 struct Lisp_Process
*p
;
2601 struct gcpro gcpro1
;
2602 Lisp_Object name
, buffer
;
2603 Lisp_Object tem
, val
;
2604 ptrdiff_t specpdl_count
= -1;
2609 contact
= Flist (nargs
, args
);
2612 port
= Fplist_get (contact
, QCport
);
2614 error ("No port specified");
2615 CHECK_STRING (port
);
2617 if (NILP (Fplist_member (contact
, QCspeed
)))
2618 error (":speed not specified");
2619 if (!NILP (Fplist_get (contact
, QCspeed
)))
2620 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2622 name
= Fplist_get (contact
, QCname
);
2625 CHECK_STRING (name
);
2626 proc
= make_process (name
);
2627 specpdl_count
= SPECPDL_INDEX ();
2628 record_unwind_protect (make_serial_process_unwind
, proc
);
2629 p
= XPROCESS (proc
);
2631 fd
= serial_open (SSDATA (port
));
2634 if (fd
> max_process_desc
)
2635 max_process_desc
= fd
;
2636 chan_process
[fd
] = proc
;
2638 buffer
= Fplist_get (contact
, QCbuffer
);
2641 buffer
= Fget_buffer_create (buffer
);
2642 pset_buffer (p
, buffer
);
2644 pset_childp (p
, contact
);
2645 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2646 pset_type (p
, Qserial
);
2647 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2648 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2650 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2651 p
->kill_without_query
= 1;
2652 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2653 pset_command (p
, Qt
);
2656 if (!EQ (p
->command
, Qt
))
2658 FD_SET (fd
, &input_wait_mask
);
2659 FD_SET (fd
, &non_keyboard_wait_mask
);
2662 if (BUFFERP (buffer
))
2664 set_marker_both (p
->mark
, buffer
,
2665 BUF_ZV (XBUFFER (buffer
)),
2666 BUF_ZV_BYTE (XBUFFER (buffer
)));
2669 tem
= Fplist_member (contact
, QCcoding
);
2670 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2676 val
= XCAR (XCDR (tem
));
2680 else if (!NILP (Vcoding_system_for_read
))
2681 val
= Vcoding_system_for_read
;
2682 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2683 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2685 pset_decode_coding_system (p
, val
);
2690 val
= XCAR (XCDR (tem
));
2694 else if (!NILP (Vcoding_system_for_write
))
2695 val
= Vcoding_system_for_write
;
2696 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2697 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2699 pset_encode_coding_system (p
, val
);
2701 setup_process_coding_systems (proc
);
2702 pset_decoding_buf (p
, empty_unibyte_string
);
2703 p
->decoding_carryover
= 0;
2704 pset_encoding_buf (p
, empty_unibyte_string
);
2705 p
->inherit_coding_system_flag
2706 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2708 Fserial_process_configure (nargs
, args
);
2710 specpdl_ptr
= specpdl
+ specpdl_count
;
2716 /* Create a network stream/datagram client/server process. Treated
2717 exactly like a normal process when reading and writing. Primary
2718 differences are in status display and process deletion. A network
2719 connection has no PID; you cannot signal it. All you can do is
2720 stop/continue it and deactivate/close it via delete-process */
2722 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2724 doc
: /* Create and return a network server or client process.
2726 In Emacs, network connections are represented by process objects, so
2727 input and output work as for subprocesses and `delete-process' closes
2728 a network connection. However, a network process has no process id,
2729 it cannot be signaled, and the status codes are different from normal
2732 Arguments are specified as keyword/argument pairs. The following
2733 arguments are defined:
2735 :name NAME -- NAME is name for process. It is modified if necessary
2738 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2739 with the process. Process output goes at end of that buffer, unless
2740 you specify an output stream or filter function to handle the output.
2741 BUFFER may be also nil, meaning that this process is not associated
2744 :host HOST -- HOST is name of the host to connect to, or its IP
2745 address. The symbol `local' specifies the local host. If specified
2746 for a server process, it must be a valid name or address for the local
2747 host, and only clients connecting to that address will be accepted.
2749 :service SERVICE -- SERVICE is name of the service desired, or an
2750 integer specifying a port number to connect to. If SERVICE is t,
2751 a random port number is selected for the server. (If Emacs was
2752 compiled with getaddrinfo, a port number can also be specified as a
2753 string, e.g. "80", as well as an integer. This is not portable.)
2755 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2756 stream type connection, `datagram' creates a datagram type connection,
2757 `seqpacket' creates a reliable datagram connection.
2759 :family FAMILY -- FAMILY is the address (and protocol) family for the
2760 service specified by HOST and SERVICE. The default (nil) is to use
2761 whatever address family (IPv4 or IPv6) that is defined for the host
2762 and port number specified by HOST and SERVICE. Other address families
2764 local -- for a local (i.e. UNIX) address specified by SERVICE.
2765 ipv4 -- use IPv4 address family only.
2766 ipv6 -- use IPv6 address family only.
2768 :local ADDRESS -- ADDRESS is the local address used for the connection.
2769 This parameter is ignored when opening a client process. When specified
2770 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2772 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2773 connection. This parameter is ignored when opening a stream server
2774 process. For a datagram server process, it specifies the initial
2775 setting of the remote datagram address. When specified for a client
2776 process, the FAMILY, HOST, and SERVICE args are ignored.
2778 The format of ADDRESS depends on the address family:
2779 - An IPv4 address is represented as an vector of integers [A B C D P]
2780 corresponding to numeric IP address A.B.C.D and port number P.
2781 - A local address is represented as a string with the address in the
2782 local address space.
2783 - An "unsupported family" address is represented by a cons (F . AV)
2784 where F is the family number and AV is a vector containing the socket
2785 address data with one element per address data byte. Do not rely on
2786 this format in portable code, as it may depend on implementation
2787 defined constants, data sizes, and data structure alignment.
2789 :coding CODING -- If CODING is a symbol, it specifies the coding
2790 system used for both reading and writing for this process. If CODING
2791 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2792 ENCODING is used for writing.
2794 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2795 return without waiting for the connection to complete; instead, the
2796 sentinel function will be called with second arg matching "open" (if
2797 successful) or "failed" when the connect completes. Default is to use
2798 a blocking connect (i.e. wait) for stream type connections.
2800 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2801 running when Emacs is exited.
2803 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2804 In the stopped state, a server process does not accept new
2805 connections, and a client process does not handle incoming traffic.
2806 The stopped state is cleared by `continue-process' and set by
2809 :filter FILTER -- Install FILTER as the process filter.
2811 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2812 process filter are multibyte, otherwise they are unibyte.
2813 If this keyword is not specified, the strings are multibyte if
2814 the default value of `enable-multibyte-characters' is non-nil.
2816 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2818 :log LOG -- Install LOG as the server process log function. This
2819 function is called when the server accepts a network connection from a
2820 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2821 is the server process, CLIENT is the new process for the connection,
2822 and MESSAGE is a string.
2824 :plist PLIST -- Install PLIST as the new process' initial plist.
2826 :server QLEN -- if QLEN is non-nil, create a server process for the
2827 specified FAMILY, SERVICE, and connection type (stream or datagram).
2828 If QLEN is an integer, it is used as the max. length of the server's
2829 pending connection queue (also known as the backlog); the default
2830 queue length is 5. Default is to create a client process.
2832 The following network options can be specified for this connection:
2834 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2835 :dontroute BOOL -- Only send to directly connected hosts.
2836 :keepalive BOOL -- Send keep-alive messages on network stream.
2837 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2838 :oobinline BOOL -- Place out-of-band data in receive data stream.
2839 :priority INT -- Set protocol defined priority for sent packets.
2840 :reuseaddr BOOL -- Allow reusing a recently used local address
2841 (this is allowed by default for a server process).
2842 :bindtodevice NAME -- bind to interface NAME. Using this may require
2843 special privileges on some systems.
2845 Consult the relevant system programmer's manual pages for more
2846 information on using these options.
2849 A server process will listen for and accept connections from clients.
2850 When a client connection is accepted, a new network process is created
2851 for the connection with the following parameters:
2853 - The client's process name is constructed by concatenating the server
2854 process' NAME and a client identification string.
2855 - If the FILTER argument is non-nil, the client process will not get a
2856 separate process buffer; otherwise, the client's process buffer is a newly
2857 created buffer named after the server process' BUFFER name or process
2858 NAME concatenated with the client identification string.
2859 - The connection type and the process filter and sentinel parameters are
2860 inherited from the server process' TYPE, FILTER and SENTINEL.
2861 - The client process' contact info is set according to the client's
2862 addressing information (typically an IP address and a port number).
2863 - The client process' plist is initialized from the server's plist.
2865 Notice that the FILTER and SENTINEL args are never used directly by
2866 the server process. Also, the BUFFER argument is not used directly by
2867 the server process, but via the optional :log function, accepted (and
2868 failed) connections may be logged in the server process' buffer.
2870 The original argument list, modified with the actual connection
2871 information, is available via the `process-contact' function.
2873 usage: (make-network-process &rest ARGS) */)
2874 (ptrdiff_t nargs
, Lisp_Object
*args
)
2877 Lisp_Object contact
;
2878 struct Lisp_Process
*p
;
2879 #ifdef HAVE_GETADDRINFO
2880 struct addrinfo ai
, *res
, *lres
;
2881 struct addrinfo hints
;
2882 const char *portstring
;
2884 #else /* HAVE_GETADDRINFO */
2885 struct _emacs_addrinfo
2891 struct sockaddr
*ai_addr
;
2892 struct _emacs_addrinfo
*ai_next
;
2894 #endif /* HAVE_GETADDRINFO */
2895 struct sockaddr_in address_in
;
2896 #ifdef HAVE_LOCAL_SOCKETS
2897 struct sockaddr_un address_un
;
2902 int s
= -1, outch
, inch
;
2903 struct gcpro gcpro1
;
2904 ptrdiff_t count
= SPECPDL_INDEX ();
2906 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2908 Lisp_Object name
, buffer
, host
, service
, address
;
2909 Lisp_Object filter
, sentinel
;
2910 int is_non_blocking_client
= 0;
2911 int is_server
= 0, backlog
= 5;
2918 /* Save arguments for process-contact and clone-process. */
2919 contact
= Flist (nargs
, args
);
2923 /* Ensure socket support is loaded if available. */
2924 init_winsock (TRUE
);
2927 /* :type TYPE (nil: stream, datagram */
2928 tem
= Fplist_get (contact
, QCtype
);
2930 socktype
= SOCK_STREAM
;
2931 #ifdef DATAGRAM_SOCKETS
2932 else if (EQ (tem
, Qdatagram
))
2933 socktype
= SOCK_DGRAM
;
2935 #ifdef HAVE_SEQPACKET
2936 else if (EQ (tem
, Qseqpacket
))
2937 socktype
= SOCK_SEQPACKET
;
2940 error ("Unsupported connection type");
2943 tem
= Fplist_get (contact
, QCserver
);
2946 /* Don't support network sockets when non-blocking mode is
2947 not available, since a blocked Emacs is not useful. */
2948 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2949 error ("Network servers not supported");
2952 if (TYPE_RANGED_INTEGERP (int, tem
))
2953 backlog
= XINT (tem
);
2957 /* Make QCaddress an alias for :local (server) or :remote (client). */
2958 QCaddress
= is_server
? QClocal
: QCremote
;
2961 if (!is_server
&& socktype
!= SOCK_DGRAM
2962 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2964 #ifndef NON_BLOCKING_CONNECT
2965 error ("Non-blocking connect not supported");
2967 is_non_blocking_client
= 1;
2971 name
= Fplist_get (contact
, QCname
);
2972 buffer
= Fplist_get (contact
, QCbuffer
);
2973 filter
= Fplist_get (contact
, QCfilter
);
2974 sentinel
= Fplist_get (contact
, QCsentinel
);
2976 CHECK_STRING (name
);
2978 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2979 ai
.ai_socktype
= socktype
;
2984 /* :local ADDRESS or :remote ADDRESS */
2985 address
= Fplist_get (contact
, QCaddress
);
2986 if (!NILP (address
))
2988 host
= service
= Qnil
;
2990 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2991 error ("Malformed :address");
2992 ai
.ai_family
= family
;
2993 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2994 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2998 /* :family FAMILY -- nil (for Inet), local, or integer. */
2999 tem
= Fplist_get (contact
, QCfamily
);
3002 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3008 #ifdef HAVE_LOCAL_SOCKETS
3009 else if (EQ (tem
, Qlocal
))
3013 else if (EQ (tem
, Qipv6
))
3016 else if (EQ (tem
, Qipv4
))
3018 else if (TYPE_RANGED_INTEGERP (int, tem
))
3019 family
= XINT (tem
);
3021 error ("Unknown address family");
3023 ai
.ai_family
= family
;
3025 /* :service SERVICE -- string, integer (port number), or t (random port). */
3026 service
= Fplist_get (contact
, QCservice
);
3028 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3029 host
= Fplist_get (contact
, QChost
);
3032 if (EQ (host
, Qlocal
))
3033 /* Depending on setup, "localhost" may map to different IPv4 and/or
3034 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3035 host
= build_string ("127.0.0.1");
3036 CHECK_STRING (host
);
3039 #ifdef HAVE_LOCAL_SOCKETS
3040 if (family
== AF_LOCAL
)
3044 message (":family local ignores the :host \"%s\" property",
3046 contact
= Fplist_put (contact
, QChost
, Qnil
);
3049 CHECK_STRING (service
);
3050 memset (&address_un
, 0, sizeof address_un
);
3051 address_un
.sun_family
= AF_LOCAL
;
3052 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3053 error ("Service name too long");
3054 strcpy (address_un
.sun_path
, SSDATA (service
));
3055 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3056 ai
.ai_addrlen
= sizeof address_un
;
3061 /* Slow down polling to every ten seconds.
3062 Some kernels have a bug which causes retrying connect to fail
3063 after a connect. Polling can interfere with gethostbyname too. */
3064 #ifdef POLL_FOR_INPUT
3065 if (socktype
!= SOCK_DGRAM
)
3067 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3068 bind_polling_period (10);
3072 #ifdef HAVE_GETADDRINFO
3073 /* If we have a host, use getaddrinfo to resolve both host and service.
3074 Otherwise, use getservbyname to lookup the service. */
3078 /* SERVICE can either be a string or int.
3079 Convert to a C string for later use by getaddrinfo. */
3080 if (EQ (service
, Qt
))
3082 else if (INTEGERP (service
))
3084 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3085 portstring
= portbuf
;
3089 CHECK_STRING (service
);
3090 portstring
= SSDATA (service
);
3095 memset (&hints
, 0, sizeof (hints
));
3097 hints
.ai_family
= family
;
3098 hints
.ai_socktype
= socktype
;
3099 hints
.ai_protocol
= 0;
3101 #ifdef HAVE_RES_INIT
3105 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3107 #ifdef HAVE_GAI_STRERROR
3108 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3110 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3116 #endif /* HAVE_GETADDRINFO */
3118 /* We end up here if getaddrinfo is not defined, or in case no hostname
3119 has been specified (e.g. for a local server process). */
3121 if (EQ (service
, Qt
))
3123 else if (INTEGERP (service
))
3124 port
= htons ((unsigned short) XINT (service
));
3127 struct servent
*svc_info
;
3128 CHECK_STRING (service
);
3129 svc_info
= getservbyname (SSDATA (service
),
3130 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3132 error ("Unknown service: %s", SDATA (service
));
3133 port
= svc_info
->s_port
;
3136 memset (&address_in
, 0, sizeof address_in
);
3137 address_in
.sin_family
= family
;
3138 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3139 address_in
.sin_port
= port
;
3141 #ifndef HAVE_GETADDRINFO
3144 struct hostent
*host_info_ptr
;
3146 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3147 as it may `hang' Emacs for a very long time. */
3151 #ifdef HAVE_RES_INIT
3155 host_info_ptr
= gethostbyname (SDATA (host
));
3160 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3161 host_info_ptr
->h_length
);
3162 family
= host_info_ptr
->h_addrtype
;
3163 address_in
.sin_family
= family
;
3166 /* Attempt to interpret host as numeric inet address */
3168 unsigned long numeric_addr
;
3169 numeric_addr
= inet_addr (SSDATA (host
));
3170 if (numeric_addr
== -1)
3171 error ("Unknown host \"%s\"", SDATA (host
));
3173 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3174 sizeof (address_in
.sin_addr
));
3178 #endif /* not HAVE_GETADDRINFO */
3180 ai
.ai_family
= family
;
3181 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3182 ai
.ai_addrlen
= sizeof address_in
;
3186 /* Do this in case we never enter the for-loop below. */
3187 count1
= SPECPDL_INDEX ();
3190 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3199 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3206 #ifdef DATAGRAM_SOCKETS
3207 if (!is_server
&& socktype
== SOCK_DGRAM
)
3209 #endif /* DATAGRAM_SOCKETS */
3211 #ifdef NON_BLOCKING_CONNECT
3212 if (is_non_blocking_client
)
3215 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3217 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3229 /* Make us close S if quit. */
3230 record_unwind_protect (close_file_unwind
, make_number (s
));
3232 /* Parse network options in the arg list.
3233 We simply ignore anything which isn't a known option (including other keywords).
3234 An error is signaled if setting a known option fails. */
3235 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3236 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3240 /* Configure as a server socket. */
3242 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3243 explicit :reuseaddr key to override this. */
3244 #ifdef HAVE_LOCAL_SOCKETS
3245 if (family
!= AF_LOCAL
)
3247 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3250 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3251 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3254 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3255 report_file_error ("Cannot bind server socket", Qnil
);
3257 #ifdef HAVE_GETSOCKNAME
3258 if (EQ (service
, Qt
))
3260 struct sockaddr_in sa1
;
3261 socklen_t len1
= sizeof (sa1
);
3262 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3264 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3265 service
= make_number (ntohs (sa1
.sin_port
));
3266 contact
= Fplist_put (contact
, QCservice
, service
);
3271 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3272 report_file_error ("Cannot listen on server socket", Qnil
);
3280 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3283 if (ret
== 0 || xerrno
== EISCONN
)
3285 /* The unwind-protect will be discarded afterwards.
3286 Likewise for immediate_quit. */
3290 #ifdef NON_BLOCKING_CONNECT
3292 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3296 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3303 if (xerrno
== EINTR
)
3305 /* Unlike most other syscalls connect() cannot be called
3306 again. (That would return EALREADY.) The proper way to
3307 wait for completion is pselect(). */
3315 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3321 report_file_error ("select failed", Qnil
);
3325 len
= sizeof xerrno
;
3326 eassert (FD_ISSET (s
, &fdset
));
3327 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3328 report_file_error ("getsockopt failed", Qnil
);
3330 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3334 #endif /* !WINDOWSNT */
3338 /* Discard the unwind protect closing S. */
3339 specpdl_ptr
= specpdl
+ count1
;
3344 if (xerrno
== EINTR
)
3351 #ifdef DATAGRAM_SOCKETS
3352 if (socktype
== SOCK_DGRAM
)
3354 if (datagram_address
[s
].sa
)
3356 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3357 datagram_address
[s
].len
= lres
->ai_addrlen
;
3361 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3362 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3365 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3366 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3367 conv_lisp_to_sockaddr (rfamily
, remote
,
3368 datagram_address
[s
].sa
, rlen
);
3372 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3375 contact
= Fplist_put (contact
, QCaddress
,
3376 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3377 #ifdef HAVE_GETSOCKNAME
3380 struct sockaddr_in sa1
;
3381 socklen_t len1
= sizeof (sa1
);
3382 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3383 contact
= Fplist_put (contact
, QClocal
,
3384 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3391 #ifdef HAVE_GETADDRINFO
3400 /* Discard the unwind protect for closing S, if any. */
3401 specpdl_ptr
= specpdl
+ count1
;
3403 /* Unwind bind_polling_period and request_sigio. */
3404 unbind_to (count
, Qnil
);
3408 /* If non-blocking got this far - and failed - assume non-blocking is
3409 not supported after all. This is probably a wrong assumption, but
3410 the normal blocking calls to open-network-stream handles this error
3412 if (is_non_blocking_client
)
3417 report_file_error ("make server process failed", contact
);
3419 report_file_error ("make client process failed", contact
);
3426 buffer
= Fget_buffer_create (buffer
);
3427 proc
= make_process (name
);
3429 chan_process
[inch
] = proc
;
3432 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3435 fcntl (inch
, F_SETFL
, O_NDELAY
);
3439 p
= XPROCESS (proc
);
3441 pset_childp (p
, contact
);
3442 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3443 pset_type (p
, Qnetwork
);
3445 pset_buffer (p
, buffer
);
3446 pset_sentinel (p
, sentinel
);
3447 pset_filter (p
, filter
);
3448 pset_log (p
, Fplist_get (contact
, QClog
));
3449 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3450 p
->kill_without_query
= 1;
3451 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3452 pset_command (p
, Qt
);
3456 if (is_server
&& socktype
!= SOCK_DGRAM
)
3457 pset_status (p
, Qlisten
);
3459 /* Make the process marker point into the process buffer (if any). */
3460 if (BUFFERP (buffer
))
3461 set_marker_both (p
->mark
, buffer
,
3462 BUF_ZV (XBUFFER (buffer
)),
3463 BUF_ZV_BYTE (XBUFFER (buffer
)));
3465 #ifdef NON_BLOCKING_CONNECT
3466 if (is_non_blocking_client
)
3468 /* We may get here if connect did succeed immediately. However,
3469 in that case, we still need to signal this like a non-blocking
3471 pset_status (p
, Qconnect
);
3472 if (!FD_ISSET (inch
, &connect_wait_mask
))
3474 FD_SET (inch
, &connect_wait_mask
);
3475 FD_SET (inch
, &write_mask
);
3476 num_pending_connects
++;
3481 /* A server may have a client filter setting of Qt, but it must
3482 still listen for incoming connects unless it is stopped. */
3483 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3484 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3486 FD_SET (inch
, &input_wait_mask
);
3487 FD_SET (inch
, &non_keyboard_wait_mask
);
3490 if (inch
> max_process_desc
)
3491 max_process_desc
= inch
;
3493 tem
= Fplist_member (contact
, QCcoding
);
3494 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3495 tem
= Qnil
; /* No error message (too late!). */
3498 /* Setup coding systems for communicating with the network stream. */
3499 struct gcpro gcpro1
;
3500 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3501 Lisp_Object coding_systems
= Qt
;
3502 Lisp_Object fargs
[5], val
;
3506 val
= XCAR (XCDR (tem
));
3510 else if (!NILP (Vcoding_system_for_read
))
3511 val
= Vcoding_system_for_read
;
3512 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3513 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3514 /* We dare not decode end-of-line format by setting VAL to
3515 Qraw_text, because the existing Emacs Lisp libraries
3516 assume that they receive bare code including a sequence of
3521 if (NILP (host
) || NILP (service
))
3522 coding_systems
= Qnil
;
3525 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3526 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3528 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3531 if (CONSP (coding_systems
))
3532 val
= XCAR (coding_systems
);
3533 else if (CONSP (Vdefault_process_coding_system
))
3534 val
= XCAR (Vdefault_process_coding_system
);
3538 pset_decode_coding_system (p
, val
);
3542 val
= XCAR (XCDR (tem
));
3546 else if (!NILP (Vcoding_system_for_write
))
3547 val
= Vcoding_system_for_write
;
3548 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3552 if (EQ (coding_systems
, Qt
))
3554 if (NILP (host
) || NILP (service
))
3555 coding_systems
= Qnil
;
3558 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3559 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3561 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3565 if (CONSP (coding_systems
))
3566 val
= XCDR (coding_systems
);
3567 else if (CONSP (Vdefault_process_coding_system
))
3568 val
= XCDR (Vdefault_process_coding_system
);
3572 pset_encode_coding_system (p
, val
);
3574 setup_process_coding_systems (proc
);
3576 pset_decoding_buf (p
, empty_unibyte_string
);
3577 p
->decoding_carryover
= 0;
3578 pset_encoding_buf (p
, empty_unibyte_string
);
3580 p
->inherit_coding_system_flag
3581 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3588 #if defined (HAVE_NET_IF_H)
3591 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3592 doc
: /* Return an alist of all network interfaces and their network address.
3593 Each element is a cons, the car of which is a string containing the
3594 interface name, and the cdr is the network address in internal
3595 format; see the description of ADDRESS in `make-network-process'. */)
3598 struct ifconf ifconf
;
3599 struct ifreq
*ifreq
;
3601 ptrdiff_t buf_size
= 512;
3605 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3611 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3612 ifconf
.ifc_buf
= buf
;
3613 ifconf
.ifc_len
= buf_size
;
3614 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3621 while (ifconf
.ifc_len
== buf_size
);
3626 ifreq
= ifconf
.ifc_req
;
3627 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3629 struct ifreq
*ifq
= ifreq
;
3630 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3631 #define SIZEOF_IFREQ(sif) \
3632 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3633 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3635 int len
= SIZEOF_IFREQ (ifq
);
3637 int len
= sizeof (*ifreq
);
3639 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3641 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3643 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3646 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3647 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3648 res
= Fcons (Fcons (build_string (namebuf
),
3649 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3650 sizeof (struct sockaddr
))),
3657 #endif /* SIOCGIFCONF */
3659 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3663 const char *flag_sym
;
3666 static const struct ifflag_def ifflag_table
[] = {
3670 #ifdef IFF_BROADCAST
3671 { IFF_BROADCAST
, "broadcast" },
3674 { IFF_DEBUG
, "debug" },
3677 { IFF_LOOPBACK
, "loopback" },
3679 #ifdef IFF_POINTOPOINT
3680 { IFF_POINTOPOINT
, "pointopoint" },
3683 { IFF_RUNNING
, "running" },
3686 { IFF_NOARP
, "noarp" },
3689 { IFF_PROMISC
, "promisc" },
3691 #ifdef IFF_NOTRAILERS
3692 #ifdef NS_IMPL_COCOA
3693 /* Really means smart, notrailers is obsolete */
3694 { IFF_NOTRAILERS
, "smart" },
3696 { IFF_NOTRAILERS
, "notrailers" },
3700 { IFF_ALLMULTI
, "allmulti" },
3703 { IFF_MASTER
, "master" },
3706 { IFF_SLAVE
, "slave" },
3708 #ifdef IFF_MULTICAST
3709 { IFF_MULTICAST
, "multicast" },
3712 { IFF_PORTSEL
, "portsel" },
3714 #ifdef IFF_AUTOMEDIA
3715 { IFF_AUTOMEDIA
, "automedia" },
3718 { IFF_DYNAMIC
, "dynamic" },
3721 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3724 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3727 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3730 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3733 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3738 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3739 doc
: /* Return information about network interface named IFNAME.
3740 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3741 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3742 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3743 FLAGS is the current flags of the interface. */)
3744 (Lisp_Object ifname
)
3747 Lisp_Object res
= Qnil
;
3751 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3752 && defined HAVE_GETIFADDRS && defined LLADDR)
3753 struct ifaddrs
*ifap
;
3756 CHECK_STRING (ifname
);
3758 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3759 error ("interface name too long");
3760 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3762 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3767 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3768 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3770 int flags
= rq
.ifr_flags
;
3771 const struct ifflag_def
*fp
;
3774 /* If flags is smaller than int (i.e. short) it may have the high bit set
3775 due to IFF_MULTICAST. In that case, sign extending it into
3777 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3778 flags
= (unsigned short) rq
.ifr_flags
;
3781 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3783 if (flags
& fp
->flag_bit
)
3785 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3786 flags
-= fp
->flag_bit
;
3789 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3793 elt
= Fcons (make_number (fnum
), elt
);
3798 res
= Fcons (elt
, res
);
3801 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3802 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3804 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3805 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3809 for (n
= 0; n
< 6; n
++)
3810 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3811 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3813 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3814 if (getifaddrs (&ifap
) != -1)
3816 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3817 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3820 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3822 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3823 unsigned char linkaddr
[6];
3826 if (it
->ifa_addr
->sa_family
!= AF_LINK
3827 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3828 || sdl
->sdl_alen
!= 6)
3831 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3832 for (n
= 0; n
< 6; n
++)
3833 p
->contents
[n
] = make_number (linkaddr
[n
]);
3835 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3839 #ifdef HAVE_FREEIFADDRS
3843 #endif /* HAVE_GETIFADDRS && LLADDR */
3845 res
= Fcons (elt
, res
);
3848 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3849 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3852 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3853 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3855 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3859 res
= Fcons (elt
, res
);
3862 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3863 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3866 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3869 res
= Fcons (elt
, res
);
3872 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3873 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3876 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3879 res
= Fcons (elt
, res
);
3883 return any
? res
: Qnil
;
3886 #endif /* defined (HAVE_NET_IF_H) */
3888 /* Turn off input and output for process PROC. */
3891 deactivate_process (Lisp_Object proc
)
3893 register int inchannel
, outchannel
;
3894 register struct Lisp_Process
*p
= XPROCESS (proc
);
3897 /* Delete GnuTLS structures in PROC, if any. */
3898 emacs_gnutls_deinit (proc
);
3899 #endif /* HAVE_GNUTLS */
3901 inchannel
= p
->infd
;
3902 outchannel
= p
->outfd
;
3904 #ifdef ADAPTIVE_READ_BUFFERING
3905 if (p
->read_output_delay
> 0)
3907 if (--process_output_delay_count
< 0)
3908 process_output_delay_count
= 0;
3909 p
->read_output_delay
= 0;
3910 p
->read_output_skip
= 0;
3916 /* Beware SIGCHLD hereabouts. */
3917 flush_pending_output (inchannel
);
3918 emacs_close (inchannel
);
3919 if (outchannel
>= 0 && outchannel
!= inchannel
)
3920 emacs_close (outchannel
);
3924 #ifdef DATAGRAM_SOCKETS
3925 if (DATAGRAM_CHAN_P (inchannel
))
3927 xfree (datagram_address
[inchannel
].sa
);
3928 datagram_address
[inchannel
].sa
= 0;
3929 datagram_address
[inchannel
].len
= 0;
3932 chan_process
[inchannel
] = Qnil
;
3933 FD_CLR (inchannel
, &input_wait_mask
);
3934 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3935 #ifdef NON_BLOCKING_CONNECT
3936 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3938 FD_CLR (inchannel
, &connect_wait_mask
);
3939 FD_CLR (inchannel
, &write_mask
);
3940 if (--num_pending_connects
< 0)
3944 if (inchannel
== max_process_desc
)
3947 /* We just closed the highest-numbered process input descriptor,
3948 so recompute the highest-numbered one now. */
3949 max_process_desc
= 0;
3950 for (i
= 0; i
< MAXDESC
; i
++)
3951 if (!NILP (chan_process
[i
]))
3952 max_process_desc
= i
;
3958 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3960 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3961 It is read into the process' buffers or given to their filter functions.
3962 Non-nil arg PROCESS means do not return until some output has been received
3965 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3966 and milliseconds to wait; return after that much time whether or not
3967 there is any subprocess output. If SECONDS is a floating point number,
3968 it specifies a fractional number of seconds to wait.
3969 The MILLISEC argument is obsolete and should be avoided.
3971 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3972 from PROCESS, suspending reading output from other processes.
3973 If JUST-THIS-ONE is an integer, don't run any timers either.
3974 Return non-nil if we received any output before the timeout expired. */)
3975 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3980 if (! NILP (process
))
3981 CHECK_PROCESS (process
);
3983 just_this_one
= Qnil
;
3985 if (!NILP (millisec
))
3986 { /* Obsolete calling convention using integers rather than floats. */
3987 CHECK_NUMBER (millisec
);
3989 seconds
= make_float (XINT (millisec
) / 1000.0);
3992 CHECK_NUMBER (seconds
);
3993 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4000 if (!NILP (seconds
))
4002 if (INTEGERP (seconds
))
4004 if (0 < XINT (seconds
))
4006 secs
= XINT (seconds
);
4010 else if (FLOATP (seconds
))
4012 if (0 < XFLOAT_DATA (seconds
))
4014 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4015 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
4016 nsecs
= EMACS_NSECS (t
);
4020 wrong_type_argument (Qnumberp
, seconds
);
4022 else if (! NILP (process
))
4026 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4028 !NILP (process
) ? XPROCESS (process
) : NULL
,
4029 NILP (just_this_one
) ? 0 :
4030 !INTEGERP (just_this_one
) ? 1 : -1)
4034 /* Accept a connection for server process SERVER on CHANNEL. */
4036 static int connect_counter
= 0;
4039 server_accept_connection (Lisp_Object server
, int channel
)
4041 Lisp_Object proc
, caller
, name
, buffer
;
4042 Lisp_Object contact
, host
, service
;
4043 struct Lisp_Process
*ps
= XPROCESS (server
);
4044 struct Lisp_Process
*p
;
4048 struct sockaddr_in in
;
4050 struct sockaddr_in6 in6
;
4052 #ifdef HAVE_LOCAL_SOCKETS
4053 struct sockaddr_un un
;
4056 socklen_t len
= sizeof saddr
;
4058 s
= accept (channel
, &saddr
.sa
, &len
);
4067 if (code
== EWOULDBLOCK
)
4071 if (!NILP (ps
->log
))
4072 call3 (ps
->log
, server
, Qnil
,
4073 concat3 (build_string ("accept failed with code"),
4074 Fnumber_to_string (make_number (code
)),
4075 build_string ("\n")));
4081 /* Setup a new process to handle the connection. */
4083 /* Generate a unique identification of the caller, and build contact
4084 information for this process. */
4087 switch (saddr
.sa
.sa_family
)
4091 Lisp_Object args
[5];
4092 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4093 args
[0] = build_string ("%d.%d.%d.%d");
4094 args
[1] = make_number (*ip
++);
4095 args
[2] = make_number (*ip
++);
4096 args
[3] = make_number (*ip
++);
4097 args
[4] = make_number (*ip
++);
4098 host
= Fformat (5, args
);
4099 service
= make_number (ntohs (saddr
.in
.sin_port
));
4101 args
[0] = build_string (" <%s:%d>");
4104 caller
= Fformat (3, args
);
4111 Lisp_Object args
[9];
4112 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4114 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4115 for (i
= 0; i
< 8; i
++)
4116 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4117 host
= Fformat (9, args
);
4118 service
= make_number (ntohs (saddr
.in
.sin_port
));
4120 args
[0] = build_string (" <[%s]:%d>");
4123 caller
= Fformat (3, args
);
4128 #ifdef HAVE_LOCAL_SOCKETS
4132 caller
= Fnumber_to_string (make_number (connect_counter
));
4133 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4137 /* Create a new buffer name for this process if it doesn't have a
4138 filter. The new buffer name is based on the buffer name or
4139 process name of the server process concatenated with the caller
4142 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4146 buffer
= ps
->buffer
;
4148 buffer
= Fbuffer_name (buffer
);
4153 buffer
= concat2 (buffer
, caller
);
4154 buffer
= Fget_buffer_create (buffer
);
4158 /* Generate a unique name for the new server process. Combine the
4159 server process name with the caller identification. */
4161 name
= concat2 (ps
->name
, caller
);
4162 proc
= make_process (name
);
4164 chan_process
[s
] = proc
;
4167 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4170 fcntl (s
, F_SETFL
, O_NDELAY
);
4174 p
= XPROCESS (proc
);
4176 /* Build new contact information for this setup. */
4177 contact
= Fcopy_sequence (ps
->childp
);
4178 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4179 contact
= Fplist_put (contact
, QChost
, host
);
4180 if (!NILP (service
))
4181 contact
= Fplist_put (contact
, QCservice
, service
);
4182 contact
= Fplist_put (contact
, QCremote
,
4183 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4184 #ifdef HAVE_GETSOCKNAME
4186 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4187 contact
= Fplist_put (contact
, QClocal
,
4188 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4191 pset_childp (p
, contact
);
4192 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4193 pset_type (p
, Qnetwork
);
4195 pset_buffer (p
, buffer
);
4196 pset_sentinel (p
, ps
->sentinel
);
4197 pset_filter (p
, ps
->filter
);
4198 pset_command (p
, Qnil
);
4202 pset_status (p
, Qrun
);
4204 /* Client processes for accepted connections are not stopped initially. */
4205 if (!EQ (p
->filter
, Qt
))
4207 FD_SET (s
, &input_wait_mask
);
4208 FD_SET (s
, &non_keyboard_wait_mask
);
4211 if (s
> max_process_desc
)
4212 max_process_desc
= s
;
4214 /* Setup coding system for new process based on server process.
4215 This seems to be the proper thing to do, as the coding system
4216 of the new process should reflect the settings at the time the
4217 server socket was opened; not the current settings. */
4219 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4220 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4221 setup_process_coding_systems (proc
);
4223 pset_decoding_buf (p
, empty_unibyte_string
);
4224 p
->decoding_carryover
= 0;
4225 pset_encoding_buf (p
, empty_unibyte_string
);
4227 p
->inherit_coding_system_flag
4228 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4230 if (!NILP (ps
->log
))
4231 call3 (ps
->log
, server
, proc
,
4232 concat3 (build_string ("accept from "),
4233 (STRINGP (host
) ? host
: build_string ("-")),
4234 build_string ("\n")));
4236 if (!NILP (p
->sentinel
))
4237 exec_sentinel (proc
,
4238 concat3 (build_string ("open from "),
4239 (STRINGP (host
) ? host
: build_string ("-")),
4240 build_string ("\n")));
4243 /* This variable is different from waiting_for_input in keyboard.c.
4244 It is used to communicate to a lisp process-filter/sentinel (via the
4245 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4246 for user-input when that process-filter was called.
4247 waiting_for_input cannot be used as that is by definition 0 when
4248 lisp code is being evalled.
4249 This is also used in record_asynch_buffer_change.
4250 For that purpose, this must be 0
4251 when not inside wait_reading_process_output. */
4252 static int waiting_for_user_input_p
;
4255 wait_reading_process_output_unwind (Lisp_Object data
)
4257 waiting_for_user_input_p
= XINT (data
);
4261 /* This is here so breakpoints can be put on it. */
4263 wait_reading_process_output_1 (void)
4267 /* Read and dispose of subprocess output while waiting for timeout to
4268 elapse and/or keyboard input to be available.
4272 If negative, gobble data immediately available but don't wait for any.
4275 an additional duration to wait, measured in nanoseconds
4276 If TIME_LIMIT is zero, then:
4277 If NSECS == 0, there is no limit.
4278 If NSECS > 0, the timeout consists of NSECS only.
4279 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4282 0 to ignore keyboard input, or
4283 1 to return when input is available, or
4284 -1 meaning caller will actually read the input, so don't throw to
4285 the quit handler, or
4287 DO_DISPLAY means redisplay should be done to show subprocess
4288 output that arrives.
4290 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4291 (and gobble terminal input into the buffer if any arrives).
4293 If WAIT_PROC is specified, wait until something arrives from that
4294 process. The return value is true if we read some input from
4297 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4298 (suspending output from other processes). A negative value
4299 means don't run any timers either.
4301 If WAIT_PROC is specified, then the function returns true if we
4302 received input from that process before the timeout elapsed.
4303 Otherwise, return true if we received input from any process. */
4306 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4308 Lisp_Object wait_for_cell
,
4309 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4311 register int channel
, nfds
;
4312 SELECT_TYPE Available
;
4313 SELECT_TYPE Writeok
;
4315 int check_delay
, no_avail
;
4318 EMACS_TIME timeout
, end_time
;
4319 int wait_channel
= -1;
4320 int got_some_input
= 0;
4321 ptrdiff_t count
= SPECPDL_INDEX ();
4323 FD_ZERO (&Available
);
4326 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4327 && !(CONSP (wait_proc
->status
)
4328 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4329 message ("Blocking call to accept-process-output with quit inhibited!!");
4331 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4332 if (wait_proc
!= NULL
)
4333 wait_channel
= wait_proc
->infd
;
4335 record_unwind_protect (wait_reading_process_output_unwind
,
4336 make_number (waiting_for_user_input_p
));
4337 waiting_for_user_input_p
= read_kbd
;
4344 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4345 time_limit
= TYPE_MAXIMUM (time_t);
4347 /* Since we may need to wait several times,
4348 compute the absolute time to return at. */
4349 if (time_limit
|| 0 < nsecs
)
4351 timeout
= make_emacs_time (time_limit
, nsecs
);
4352 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4357 int timeout_reduced_for_timers
= 0;
4359 /* If calling from keyboard input, do not quit
4360 since we want to return C-g as an input character.
4361 Otherwise, do pending quit if requested. */
4364 else if (pending_signals
)
4365 process_pending_signals ();
4367 /* Exit now if the cell we're waiting for became non-nil. */
4368 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4371 /* Compute time from now till when time limit is up */
4372 /* Exit if already run out */
4375 /* A negative timeout means
4376 gobble output available now
4377 but don't wait at all. */
4379 timeout
= make_emacs_time (0, 0);
4381 else if (time_limit
|| 0 < nsecs
)
4383 EMACS_TIME now
= current_emacs_time ();
4384 if (EMACS_TIME_LE (end_time
, now
))
4386 timeout
= sub_emacs_time (end_time
, now
);
4390 timeout
= make_emacs_time (100000, 0);
4393 /* Normally we run timers here.
4394 But not if wait_for_cell; in those cases,
4395 the wait is supposed to be short,
4396 and those callers cannot handle running arbitrary Lisp code here. */
4397 if (NILP (wait_for_cell
)
4398 && just_wait_proc
>= 0)
4400 EMACS_TIME timer_delay
;
4404 unsigned old_timers_run
= timers_run
;
4405 struct buffer
*old_buffer
= current_buffer
;
4406 Lisp_Object old_window
= selected_window
;
4408 timer_delay
= timer_check ();
4410 /* If a timer has run, this might have changed buffers
4411 an alike. Make read_key_sequence aware of that. */
4412 if (timers_run
!= old_timers_run
4413 && (old_buffer
!= current_buffer
4414 || !EQ (old_window
, selected_window
))
4415 && waiting_for_user_input_p
== -1)
4416 record_asynch_buffer_change ();
4418 if (timers_run
!= old_timers_run
&& do_display
)
4419 /* We must retry, since a timer may have requeued itself
4420 and that could alter the time_delay. */
4421 redisplay_preserve_echo_area (9);
4425 while (!detect_input_pending ());
4427 /* If there is unread keyboard input, also return. */
4429 && requeued_events_pending_p ())
4432 /* A negative timeout means do not wait at all. */
4435 if (EMACS_TIME_VALID_P (timer_delay
))
4437 if (EMACS_TIME_LT (timer_delay
, timeout
))
4439 timeout
= timer_delay
;
4440 timeout_reduced_for_timers
= 1;
4445 /* This is so a breakpoint can be put here. */
4446 wait_reading_process_output_1 ();
4451 /* Cause C-g and alarm signals to take immediate action,
4452 and cause input available signals to zero out timeout.
4454 It is important that we do this before checking for process
4455 activity. If we get a SIGCHLD after the explicit checks for
4456 process activity, timeout is the only way we will know. */
4458 set_waiting_for_input (&timeout
);
4460 /* If status of something has changed, and no input is
4461 available, notify the user of the change right away. After
4462 this explicit check, we'll let the SIGCHLD handler zap
4463 timeout to get our attention. */
4464 if (update_tick
!= process_tick
)
4469 if (kbd_on_hold_p ())
4472 Atemp
= input_wait_mask
;
4475 timeout
= make_emacs_time (0, 0);
4476 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4478 #ifdef NON_BLOCKING_CONNECT
4479 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4483 NULL
, &timeout
, NULL
)
4486 /* It's okay for us to do this and then continue with
4487 the loop, since timeout has already been zeroed out. */
4488 clear_waiting_for_input ();
4489 status_notify (NULL
);
4490 if (do_display
) redisplay_preserve_echo_area (13);
4494 /* Don't wait for output from a non-running process. Just
4495 read whatever data has already been received. */
4496 if (wait_proc
&& wait_proc
->raw_status_new
)
4497 update_status (wait_proc
);
4499 && ! EQ (wait_proc
->status
, Qrun
)
4500 && ! EQ (wait_proc
->status
, Qconnect
))
4502 int nread
, total_nread
= 0;
4504 clear_waiting_for_input ();
4505 XSETPROCESS (proc
, wait_proc
);
4507 /* Read data from the process, until we exhaust it. */
4508 while (wait_proc
->infd
>= 0)
4510 nread
= read_process_output (proc
, wait_proc
->infd
);
4517 total_nread
+= nread
;
4521 else if (nread
== -1 && EIO
== errno
)
4525 else if (nread
== -1 && EAGAIN
== errno
)
4529 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4533 if (total_nread
> 0 && do_display
)
4534 redisplay_preserve_echo_area (10);
4539 /* Wait till there is something to do */
4541 if (wait_proc
&& just_wait_proc
)
4543 if (wait_proc
->infd
< 0) /* Terminated */
4545 FD_SET (wait_proc
->infd
, &Available
);
4549 else if (!NILP (wait_for_cell
))
4551 Available
= non_process_wait_mask
;
4558 Available
= non_keyboard_wait_mask
;
4560 Available
= input_wait_mask
;
4561 Writeok
= write_mask
;
4562 #ifdef SELECT_CANT_DO_WRITE_MASK
4567 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4570 /* If frame size has changed or the window is newly mapped,
4571 redisplay now, before we start to wait. There is a race
4572 condition here; if a SIGIO arrives between now and the select
4573 and indicates that a frame is trashed, the select may block
4574 displaying a trashed screen. */
4575 if (frame_garbaged
&& do_display
)
4577 clear_waiting_for_input ();
4578 redisplay_preserve_echo_area (11);
4580 set_waiting_for_input (&timeout
);
4583 /* Skip the `select' call if input is available and we're
4584 waiting for keyboard input or a cell change (which can be
4585 triggered by processing X events). In the latter case, set
4586 nfds to 1 to avoid breaking the loop. */
4588 if ((read_kbd
|| !NILP (wait_for_cell
))
4589 && detect_input_pending ())
4591 nfds
= read_kbd
? 0 : 1;
4598 #ifdef ADAPTIVE_READ_BUFFERING
4599 /* Set the timeout for adaptive read buffering if any
4600 process has non-zero read_output_skip and non-zero
4601 read_output_delay, and we are not reading output for a
4602 specific wait_channel. It is not executed if
4603 Vprocess_adaptive_read_buffering is nil. */
4604 if (process_output_skip
&& check_delay
> 0)
4606 int nsecs
= EMACS_NSECS (timeout
);
4607 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4608 nsecs
= READ_OUTPUT_DELAY_MAX
;
4609 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4611 proc
= chan_process
[channel
];
4614 /* Find minimum non-zero read_output_delay among the
4615 processes with non-zero read_output_skip. */
4616 if (XPROCESS (proc
)->read_output_delay
> 0)
4619 if (!XPROCESS (proc
)->read_output_skip
)
4621 FD_CLR (channel
, &Available
);
4622 XPROCESS (proc
)->read_output_skip
= 0;
4623 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4624 nsecs
= XPROCESS (proc
)->read_output_delay
;
4627 timeout
= make_emacs_time (0, nsecs
);
4628 process_output_skip
= 0;
4632 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4634 #elif defined (HAVE_NS)
4639 (max (max_process_desc
, max_input_desc
) + 1,
4641 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4642 NULL
, &timeout
, NULL
);
4645 /* GnuTLS buffers data internally. In lowat mode it leaves
4646 some data in the TCP buffers so that select works, but
4647 with custom pull/push functions we need to check if some
4648 data is available in the buffers manually. */
4653 /* We're not waiting on a specific process, so loop
4654 through all the channels and check for data.
4655 This is a workaround needed for some versions of
4656 the gnutls library -- 2.12.14 has been confirmed
4658 http://comments.gmane.org/gmane.emacs.devel/145074 */
4659 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4660 if (! NILP (chan_process
[channel
]))
4662 struct Lisp_Process
*p
=
4663 XPROCESS (chan_process
[channel
]);
4664 if (p
&& p
->gnutls_p
&& p
->infd
4665 && ((emacs_gnutls_record_check_pending
4670 FD_SET (p
->infd
, &Available
);
4676 /* Check this specific channel. */
4677 if (wait_proc
->gnutls_p
/* Check for valid process. */
4678 /* Do we have pending data? */
4679 && ((emacs_gnutls_record_check_pending
4680 (wait_proc
->gnutls_state
))
4684 /* Set to Available. */
4685 FD_SET (wait_proc
->infd
, &Available
);
4694 /* Make C-g and alarm signals set flags again */
4695 clear_waiting_for_input ();
4697 /* If we woke up due to SIGWINCH, actually change size now. */
4698 do_pending_window_change (0);
4700 /* The following optimization fails if SIGIO is received between
4701 set_waiting_for_input and select (Bug#11536).
4702 if ((time_limit || nsecs) && nfds == 0 && ! timeout_reduced_for_timers)
4708 if (xerrno
== EINTR
)
4710 else if (xerrno
== EBADF
)
4713 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4714 the child's closure of the pts gives the parent a SIGHUP, and
4715 the ptc file descriptor is automatically closed,
4716 yielding EBADF here or at select() call above.
4717 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4718 in m/ibmrt-aix.h), and here we just ignore the select error.
4719 Cleanup occurs c/o status_notify after SIGCLD. */
4720 no_avail
= 1; /* Cannot depend on values returned */
4726 error ("select error: %s", emacs_strerror (xerrno
));
4731 FD_ZERO (&Available
);
4735 /* Check for keyboard input */
4736 /* If there is any, return immediately
4737 to give it higher priority than subprocesses */
4741 unsigned old_timers_run
= timers_run
;
4742 struct buffer
*old_buffer
= current_buffer
;
4743 Lisp_Object old_window
= selected_window
;
4746 if (detect_input_pending_run_timers (do_display
))
4748 swallow_events (do_display
);
4749 if (detect_input_pending_run_timers (do_display
))
4753 /* If a timer has run, this might have changed buffers
4754 an alike. Make read_key_sequence aware of that. */
4755 if (timers_run
!= old_timers_run
4756 && waiting_for_user_input_p
== -1
4757 && (old_buffer
!= current_buffer
4758 || !EQ (old_window
, selected_window
)))
4759 record_asynch_buffer_change ();
4765 /* If there is unread keyboard input, also return. */
4767 && requeued_events_pending_p ())
4770 /* If we are not checking for keyboard input now,
4771 do process events (but don't run any timers).
4772 This is so that X events will be processed.
4773 Otherwise they may have to wait until polling takes place.
4774 That would causes delays in pasting selections, for example.
4776 (We used to do this only if wait_for_cell.) */
4777 if (read_kbd
== 0 && detect_input_pending ())
4779 swallow_events (do_display
);
4780 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4781 if (detect_input_pending ())
4786 /* Exit now if the cell we're waiting for became non-nil. */
4787 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4791 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4792 go read it. This can happen with X on BSD after logging out.
4793 In that case, there really is no input and no SIGIO,
4794 but select says there is input. */
4796 if (read_kbd
&& interrupt_input
4797 && keyboard_bit_set (&Available
) && ! noninteractive
)
4798 handle_input_available_signal (SIGIO
);
4802 got_some_input
|= nfds
> 0;
4804 /* If checking input just got us a size-change event from X,
4805 obey it now if we should. */
4806 if (read_kbd
|| ! NILP (wait_for_cell
))
4807 do_pending_window_change (0);
4809 /* Check for data from a process. */
4810 if (no_avail
|| nfds
== 0)
4813 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4815 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4817 && ((d
->condition
& FOR_READ
4818 && FD_ISSET (channel
, &Available
))
4819 || (d
->condition
& FOR_WRITE
4820 && FD_ISSET (channel
, &write_mask
))))
4821 d
->func (channel
, d
->data
);
4824 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4826 if (FD_ISSET (channel
, &Available
)
4827 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4828 && !FD_ISSET (channel
, &non_process_wait_mask
))
4832 /* If waiting for this channel, arrange to return as
4833 soon as no more input to be processed. No more
4835 if (wait_channel
== channel
)
4841 proc
= chan_process
[channel
];
4845 /* If this is a server stream socket, accept connection. */
4846 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4848 server_accept_connection (proc
, channel
);
4852 /* Read data from the process, starting with our
4853 buffered-ahead character if we have one. */
4855 nread
= read_process_output (proc
, channel
);
4858 /* Since read_process_output can run a filter,
4859 which can call accept-process-output,
4860 don't try to read from any other processes
4861 before doing the select again. */
4862 FD_ZERO (&Available
);
4865 redisplay_preserve_echo_area (12);
4868 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4871 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4872 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4874 else if (nread
== -1 && errno
== EAGAIN
)
4878 else if (nread
== -1 && errno
== EAGAIN
)
4880 /* Note that we cannot distinguish between no input
4881 available now and a closed pipe.
4882 With luck, a closed pipe will be accompanied by
4883 subprocess termination and SIGCHLD. */
4884 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4886 #endif /* O_NDELAY */
4887 #endif /* O_NONBLOCK */
4889 /* On some OSs with ptys, when the process on one end of
4890 a pty exits, the other end gets an error reading with
4891 errno = EIO instead of getting an EOF (0 bytes read).
4892 Therefore, if we get an error reading and errno =
4893 EIO, just continue, because the child process has
4894 exited and should clean itself up soon (e.g. when we
4897 However, it has been known to happen that the SIGCHLD
4898 got lost. So raise the signal again just in case.
4900 else if (nread
== -1 && errno
== EIO
)
4902 struct Lisp_Process
*p
= XPROCESS (proc
);
4904 /* Clear the descriptor now, so we only raise the
4906 FD_CLR (channel
, &input_wait_mask
);
4907 FD_CLR (channel
, &non_keyboard_wait_mask
);
4911 /* If the EIO occurs on a pty, the SIGCHLD handler's
4912 waitpid call will not find the process object to
4913 delete. Do it here. */
4914 p
->tick
= ++process_tick
;
4915 pset_status (p
, Qfailed
);
4918 handle_child_signal (SIGCHLD
);
4920 #endif /* HAVE_PTYS */
4921 /* If we can detect process termination, don't consider the
4922 process gone just because its pipe is closed. */
4924 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4929 /* Preserve status of processes already terminated. */
4930 XPROCESS (proc
)->tick
= ++process_tick
;
4931 deactivate_process (proc
);
4932 if (XPROCESS (proc
)->raw_status_new
)
4933 update_status (XPROCESS (proc
));
4934 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4935 pset_status (XPROCESS (proc
),
4936 list2 (Qexit
, make_number (256)));
4939 #ifdef NON_BLOCKING_CONNECT
4940 if (FD_ISSET (channel
, &Writeok
)
4941 && FD_ISSET (channel
, &connect_wait_mask
))
4943 struct Lisp_Process
*p
;
4945 FD_CLR (channel
, &connect_wait_mask
);
4946 FD_CLR (channel
, &write_mask
);
4947 if (--num_pending_connects
< 0)
4950 proc
= chan_process
[channel
];
4954 p
= XPROCESS (proc
);
4957 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4958 So only use it on systems where it is known to work. */
4960 socklen_t xlen
= sizeof (xerrno
);
4961 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4966 struct sockaddr pname
;
4967 int pnamelen
= sizeof (pname
);
4969 /* If connection failed, getpeername will fail. */
4971 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4973 /* Obtain connect failure code through error slippage. */
4976 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4983 p
->tick
= ++process_tick
;
4984 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
4985 deactivate_process (proc
);
4989 pset_status (p
, Qrun
);
4990 /* Execute the sentinel here. If we had relied on
4991 status_notify to do it later, it will read input
4992 from the process before calling the sentinel. */
4993 exec_sentinel (proc
, build_string ("open\n"));
4994 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4996 FD_SET (p
->infd
, &input_wait_mask
);
4997 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5001 #endif /* NON_BLOCKING_CONNECT */
5002 } /* end for each file descriptor */
5003 } /* end while exit conditions not met */
5005 unbind_to (count
, Qnil
);
5007 /* If calling from keyboard input, do not quit
5008 since we want to return C-g as an input character.
5009 Otherwise, do pending quit if requested. */
5012 /* Prevent input_pending from remaining set if we quit. */
5013 clear_input_pending ();
5017 return got_some_input
;
5020 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5023 read_process_output_call (Lisp_Object fun_and_args
)
5025 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5029 read_process_output_error_handler (Lisp_Object error_val
)
5031 cmd_error_internal (error_val
, "error in process filter: ");
5033 update_echo_area ();
5034 Fsleep_for (make_number (2), Qnil
);
5038 /* Read pending output from the process channel,
5039 starting with our buffered-ahead character if we have one.
5040 Yield number of decoded characters read.
5042 This function reads at most 4096 characters.
5043 If you want to read all available subprocess output,
5044 you must call it repeatedly until it returns zero.
5046 The characters read are decoded according to PROC's coding-system
5050 read_process_output (Lisp_Object proc
, register int channel
)
5052 register ssize_t nbytes
;
5054 register Lisp_Object outstream
;
5055 register struct Lisp_Process
*p
= XPROCESS (proc
);
5056 register ptrdiff_t opoint
;
5057 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5058 int carryover
= p
->decoding_carryover
;
5060 ptrdiff_t count
= SPECPDL_INDEX ();
5061 Lisp_Object odeactivate
;
5063 chars
= alloca (carryover
+ readmax
);
5065 /* See the comment above. */
5066 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5068 #ifdef DATAGRAM_SOCKETS
5069 /* We have a working select, so proc_buffered_char is always -1. */
5070 if (DATAGRAM_CHAN_P (channel
))
5072 socklen_t len
= datagram_address
[channel
].len
;
5073 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5074 0, datagram_address
[channel
].sa
, &len
);
5079 int buffered
= 0 <= proc_buffered_char
[channel
];
5082 chars
[carryover
] = proc_buffered_char
[channel
];
5083 proc_buffered_char
[channel
] = -1;
5087 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5088 readmax
- buffered
);
5091 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5092 readmax
- buffered
);
5093 #ifdef ADAPTIVE_READ_BUFFERING
5094 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5096 int delay
= p
->read_output_delay
;
5099 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5102 process_output_delay_count
++;
5103 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5106 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5108 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5110 process_output_delay_count
--;
5112 p
->read_output_delay
= delay
;
5115 p
->read_output_skip
= 1;
5116 process_output_skip
= 1;
5121 nbytes
+= buffered
&& nbytes
<= 0;
5124 p
->decoding_carryover
= 0;
5126 /* At this point, NBYTES holds number of bytes just received
5127 (including the one in proc_buffered_char[channel]). */
5130 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5132 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5135 /* Now set NBYTES how many bytes we must decode. */
5136 nbytes
+= carryover
;
5138 odeactivate
= Vdeactivate_mark
;
5139 /* There's no good reason to let process filters change the current
5140 buffer, and many callers of accept-process-output, sit-for, and
5141 friends don't expect current-buffer to be changed from under them. */
5142 record_unwind_current_buffer ();
5144 /* Read and dispose of the process output. */
5145 outstream
= p
->filter
;
5146 if (!NILP (outstream
))
5149 bool outer_running_asynch_code
= running_asynch_code
;
5150 int waiting
= waiting_for_user_input_p
;
5152 /* No need to gcpro these, because all we do with them later
5153 is test them for EQness, and none of them should be a string. */
5155 Lisp_Object obuffer
, okeymap
;
5156 XSETBUFFER (obuffer
, current_buffer
);
5157 okeymap
= BVAR (current_buffer
, keymap
);
5160 /* We inhibit quit here instead of just catching it so that
5161 hitting ^G when a filter happens to be running won't screw
5163 specbind (Qinhibit_quit
, Qt
);
5164 specbind (Qlast_nonmenu_event
, Qt
);
5166 /* In case we get recursively called,
5167 and we already saved the match data nonrecursively,
5168 save the same match data in safely recursive fashion. */
5169 if (outer_running_asynch_code
)
5172 /* Don't clobber the CURRENT match data, either! */
5173 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5174 restore_search_regs ();
5175 record_unwind_save_match_data ();
5176 Fset_match_data (tem
, Qt
);
5179 /* For speed, if a search happens within this code,
5180 save the match data in a special nonrecursive fashion. */
5181 running_asynch_code
= 1;
5183 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5184 text
= coding
->dst_object
;
5185 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5186 /* A new coding system might be found. */
5187 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5189 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5191 /* Don't call setup_coding_system for
5192 proc_decode_coding_system[channel] here. It is done in
5193 detect_coding called via decode_coding above. */
5195 /* If a coding system for encoding is not yet decided, we set
5196 it as the same as coding-system for decoding.
5198 But, before doing that we must check if
5199 proc_encode_coding_system[p->outfd] surely points to a
5200 valid memory because p->outfd will be changed once EOF is
5201 sent to the process. */
5202 if (NILP (p
->encode_coding_system
)
5203 && proc_encode_coding_system
[p
->outfd
])
5205 pset_encode_coding_system
5206 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5207 setup_coding_system (p
->encode_coding_system
,
5208 proc_encode_coding_system
[p
->outfd
]);
5212 if (coding
->carryover_bytes
> 0)
5214 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5215 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5216 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5217 coding
->carryover_bytes
);
5218 p
->decoding_carryover
= coding
->carryover_bytes
;
5220 if (SBYTES (text
) > 0)
5221 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5222 sometimes it's simply wrong to wrap (e.g. when called from
5223 accept-process-output). */
5224 internal_condition_case_1 (read_process_output_call
,
5226 Fcons (proc
, Fcons (text
, Qnil
))),
5227 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5228 read_process_output_error_handler
);
5230 /* If we saved the match data nonrecursively, restore it now. */
5231 restore_search_regs ();
5232 running_asynch_code
= outer_running_asynch_code
;
5234 /* Restore waiting_for_user_input_p as it was
5235 when we were called, in case the filter clobbered it. */
5236 waiting_for_user_input_p
= waiting
;
5238 #if 0 /* Call record_asynch_buffer_change unconditionally,
5239 because we might have changed minor modes or other things
5240 that affect key bindings. */
5241 if (! EQ (Fcurrent_buffer (), obuffer
)
5242 || ! EQ (current_buffer
->keymap
, okeymap
))
5244 /* But do it only if the caller is actually going to read events.
5245 Otherwise there's no need to make him wake up, and it could
5246 cause trouble (for example it would make sit_for return). */
5247 if (waiting_for_user_input_p
== -1)
5248 record_asynch_buffer_change ();
5251 /* If no filter, write into buffer if it isn't dead. */
5252 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5254 Lisp_Object old_read_only
;
5255 ptrdiff_t old_begv
, old_zv
;
5256 ptrdiff_t old_begv_byte
, old_zv_byte
;
5257 ptrdiff_t before
, before_byte
;
5258 ptrdiff_t opoint_byte
;
5262 Fset_buffer (p
->buffer
);
5264 opoint_byte
= PT_BYTE
;
5265 old_read_only
= BVAR (current_buffer
, read_only
);
5268 old_begv_byte
= BEGV_BYTE
;
5269 old_zv_byte
= ZV_BYTE
;
5271 bset_read_only (current_buffer
, Qnil
);
5273 /* Insert new output into buffer
5274 at the current end-of-output marker,
5275 thus preserving logical ordering of input and output. */
5276 if (XMARKER (p
->mark
)->buffer
)
5277 SET_PT_BOTH (clip_to_bounds (BEGV
,
5278 marker_position (p
->mark
), ZV
),
5279 clip_to_bounds (BEGV_BYTE
,
5280 marker_byte_position (p
->mark
),
5283 SET_PT_BOTH (ZV
, ZV_BYTE
);
5285 before_byte
= PT_BYTE
;
5287 /* If the output marker is outside of the visible region, save
5288 the restriction and widen. */
5289 if (! (BEGV
<= PT
&& PT
<= ZV
))
5292 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5293 text
= coding
->dst_object
;
5294 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5295 /* A new coding system might be found. See the comment in the
5296 similar code in the previous `if' block. */
5297 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5299 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5300 if (NILP (p
->encode_coding_system
)
5301 && proc_encode_coding_system
[p
->outfd
])
5303 pset_encode_coding_system
5304 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5305 setup_coding_system (p
->encode_coding_system
,
5306 proc_encode_coding_system
[p
->outfd
]);
5309 if (coding
->carryover_bytes
> 0)
5311 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5312 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5313 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5314 coding
->carryover_bytes
);
5315 p
->decoding_carryover
= coding
->carryover_bytes
;
5317 /* Adjust the multibyteness of TEXT to that of the buffer. */
5318 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5319 != ! STRING_MULTIBYTE (text
))
5320 text
= (STRING_MULTIBYTE (text
)
5321 ? Fstring_as_unibyte (text
)
5322 : Fstring_to_multibyte (text
));
5323 /* Insert before markers in case we are inserting where
5324 the buffer's mark is, and the user's next command is Meta-y. */
5325 insert_from_string_before_markers (text
, 0, 0,
5326 SCHARS (text
), SBYTES (text
), 0);
5328 /* Make sure the process marker's position is valid when the
5329 process buffer is changed in the signal_after_change above.
5330 W3 is known to do that. */
5331 if (BUFFERP (p
->buffer
)
5332 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5333 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5335 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5337 update_mode_lines
++;
5339 /* Make sure opoint and the old restrictions
5340 float ahead of any new text just as point would. */
5341 if (opoint
>= before
)
5343 opoint
+= PT
- before
;
5344 opoint_byte
+= PT_BYTE
- before_byte
;
5346 if (old_begv
> before
)
5348 old_begv
+= PT
- before
;
5349 old_begv_byte
+= PT_BYTE
- before_byte
;
5351 if (old_zv
>= before
)
5353 old_zv
+= PT
- before
;
5354 old_zv_byte
+= PT_BYTE
- before_byte
;
5357 /* If the restriction isn't what it should be, set it. */
5358 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5359 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5362 bset_read_only (current_buffer
, old_read_only
);
5363 SET_PT_BOTH (opoint
, opoint_byte
);
5365 /* Handling the process output should not deactivate the mark. */
5366 Vdeactivate_mark
= odeactivate
;
5368 unbind_to (count
, Qnil
);
5372 /* Sending data to subprocess */
5374 /* In send_process, when a write fails temporarily,
5375 wait_reading_process_output is called. It may execute user code,
5376 e.g. timers, that attempts to write new data to the same process.
5377 We must ensure that data is sent in the right order, and not
5378 interspersed half-completed with other writes (Bug#10815). This is
5379 handled by the write_queue element of struct process. It is a list
5380 with each entry having the form
5382 (string . (offset . length))
5384 where STRING is a lisp string, OFFSET is the offset into the
5385 string's byte sequence from which we should begin to send, and
5386 LENGTH is the number of bytes left to send. */
5388 /* Create a new entry in write_queue.
5389 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5390 BUF is a pointer to the string sequence of the input_obj or a C
5391 string in case of Qt or Qnil. */
5394 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5395 const char *buf
, ptrdiff_t len
, int front
)
5398 Lisp_Object entry
, obj
;
5400 if (STRINGP (input_obj
))
5402 offset
= buf
- SSDATA (input_obj
);
5408 obj
= make_unibyte_string (buf
, len
);
5411 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5414 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5416 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5419 /* Remove the first element in the write_queue of process P, put its
5420 contents in OBJ, BUF and LEN, and return non-zero. If the
5421 write_queue is empty, return zero. */
5424 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5425 const char **buf
, ptrdiff_t *len
)
5427 Lisp_Object entry
, offset_length
;
5430 if (NILP (p
->write_queue
))
5433 entry
= XCAR (p
->write_queue
);
5434 pset_write_queue (p
, XCDR (p
->write_queue
));
5436 *obj
= XCAR (entry
);
5437 offset_length
= XCDR (entry
);
5439 *len
= XINT (XCDR (offset_length
));
5440 offset
= XINT (XCAR (offset_length
));
5441 *buf
= SSDATA (*obj
) + offset
;
5446 /* Send some data to process PROC.
5447 BUF is the beginning of the data; LEN is the number of characters.
5448 OBJECT is the Lisp object that the data comes from. If OBJECT is
5449 nil or t, it means that the data comes from C string.
5451 If OBJECT is not nil, the data is encoded by PROC's coding-system
5452 for encoding before it is sent.
5454 This function can evaluate Lisp code and can garbage collect. */
5457 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5460 struct Lisp_Process
*p
= XPROCESS (proc
);
5462 struct coding_system
*coding
;
5464 if (p
->raw_status_new
)
5466 if (! EQ (p
->status
, Qrun
))
5467 error ("Process %s not running", SDATA (p
->name
));
5469 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5471 coding
= proc_encode_coding_system
[p
->outfd
];
5472 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5474 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5475 || (BUFFERP (object
)
5476 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5479 pset_encode_coding_system
5480 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5481 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5483 /* The coding system for encoding was changed to raw-text
5484 because we sent a unibyte text previously. Now we are
5485 sending a multibyte text, thus we must encode it by the
5486 original coding system specified for the current process.
5488 Another reason we come here is that the coding system
5489 was just complemented and a new one was returned by
5490 complement_process_encoding_system. */
5491 setup_coding_system (p
->encode_coding_system
, coding
);
5492 Vlast_coding_system_used
= p
->encode_coding_system
;
5494 coding
->src_multibyte
= 1;
5498 coding
->src_multibyte
= 0;
5499 /* For sending a unibyte text, character code conversion should
5500 not take place but EOL conversion should. So, setup raw-text
5501 or one of the subsidiary if we have not yet done it. */
5502 if (CODING_REQUIRE_ENCODING (coding
))
5504 if (CODING_REQUIRE_FLUSHING (coding
))
5506 /* But, before changing the coding, we must flush out data. */
5507 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5508 send_process (proc
, "", 0, Qt
);
5509 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5511 setup_coding_system (raw_text_coding_system
5512 (Vlast_coding_system_used
),
5514 coding
->src_multibyte
= 0;
5517 coding
->dst_multibyte
= 0;
5519 if (CODING_REQUIRE_ENCODING (coding
))
5521 coding
->dst_object
= Qt
;
5522 if (BUFFERP (object
))
5524 ptrdiff_t from_byte
, from
, to
;
5525 ptrdiff_t save_pt
, save_pt_byte
;
5526 struct buffer
*cur
= current_buffer
;
5528 set_buffer_internal (XBUFFER (object
));
5529 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5531 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5532 from
= BYTE_TO_CHAR (from_byte
);
5533 to
= BYTE_TO_CHAR (from_byte
+ len
);
5534 TEMP_SET_PT_BOTH (from
, from_byte
);
5535 encode_coding_object (coding
, object
, from
, from_byte
,
5536 to
, from_byte
+ len
, Qt
);
5537 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5538 set_buffer_internal (cur
);
5540 else if (STRINGP (object
))
5542 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5543 SBYTES (object
), Qt
);
5547 coding
->dst_object
= make_unibyte_string (buf
, len
);
5548 coding
->produced
= len
;
5551 len
= coding
->produced
;
5552 object
= coding
->dst_object
;
5553 buf
= SSDATA (object
);
5556 if (pty_max_bytes
== 0)
5558 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5559 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5560 if (pty_max_bytes
< 0)
5561 pty_max_bytes
= 250;
5563 pty_max_bytes
= 250;
5565 /* Deduct one, to leave space for the eof. */
5569 /* If there is already data in the write_queue, put the new data
5570 in the back of queue. Otherwise, ignore it. */
5571 if (!NILP (p
->write_queue
))
5572 write_queue_push (p
, object
, buf
, len
, 0);
5574 do /* while !NILP (p->write_queue) */
5576 ptrdiff_t cur_len
= -1;
5577 const char *cur_buf
;
5578 Lisp_Object cur_object
;
5580 /* If write_queue is empty, ignore it. */
5581 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5585 cur_object
= object
;
5590 /* Send this batch, using one or more write calls. */
5591 ptrdiff_t written
= 0;
5592 int outfd
= p
->outfd
;
5593 #ifdef DATAGRAM_SOCKETS
5594 if (DATAGRAM_CHAN_P (outfd
))
5596 rv
= sendto (outfd
, cur_buf
, cur_len
,
5597 0, datagram_address
[outfd
].sa
,
5598 datagram_address
[outfd
].len
);
5601 else if (errno
== EMSGSIZE
)
5602 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5609 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5612 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5613 rv
= (written
? 0 : -1);
5614 #ifdef ADAPTIVE_READ_BUFFERING
5615 if (p
->read_output_delay
> 0
5616 && p
->adaptive_read_buffering
== 1)
5618 p
->read_output_delay
= 0;
5619 process_output_delay_count
--;
5620 p
->read_output_skip
= 0;
5629 || errno
== EWOULDBLOCK
5635 /* Buffer is full. Wait, accepting input;
5636 that may allow the program
5637 to finish doing output and read more. */
5639 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5640 /* A gross hack to work around a bug in FreeBSD.
5641 In the following sequence, read(2) returns
5645 write(2) 954 bytes, get EAGAIN
5646 read(2) 1024 bytes in process_read_output
5647 read(2) 11 bytes in process_read_output
5649 That is, read(2) returns more bytes than have
5650 ever been written successfully. The 1033 bytes
5651 read are the 1022 bytes written successfully
5652 after processing (for example with CRs added if
5653 the terminal is set up that way which it is
5654 here). The same bytes will be seen again in a
5655 later read(2), without the CRs. */
5657 if (errno
== EAGAIN
)
5660 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5662 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5664 /* Put what we should have written in wait_queue. */
5665 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5666 wait_reading_process_output (0, 20 * 1000 * 1000,
5667 0, 0, Qnil
, NULL
, 0);
5668 /* Reread queue, to see what is left. */
5671 else if (errno
== EPIPE
)
5673 p
->raw_status_new
= 0;
5674 pset_status (p
, list2 (Qexit
, make_number (256)));
5675 p
->tick
= ++process_tick
;
5676 deactivate_process (proc
);
5677 error ("process %s no longer connected to pipe; closed it",
5681 /* This is a real error. */
5682 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5688 while (!NILP (p
->write_queue
));
5691 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5693 doc
: /* Send current contents of region as input to PROCESS.
5694 PROCESS may be a process, a buffer, the name of a process or buffer, or
5695 nil, indicating the current buffer's process.
5696 Called from program, takes three arguments, PROCESS, START and END.
5697 If the region is more than 500 characters long,
5698 it is sent in several bunches. This may happen even for shorter regions.
5699 Output from processes can arrive in between bunches. */)
5700 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5703 ptrdiff_t start1
, end1
;
5705 proc
= get_process (process
);
5706 validate_region (&start
, &end
);
5708 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5709 move_gap (XINT (start
));
5711 start1
= CHAR_TO_BYTE (XINT (start
));
5712 end1
= CHAR_TO_BYTE (XINT (end
));
5713 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5714 Fcurrent_buffer ());
5719 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5721 doc
: /* Send PROCESS the contents of STRING as input.
5722 PROCESS may be a process, a buffer, the name of a process or buffer, or
5723 nil, indicating the current buffer's process.
5724 If STRING is more than 500 characters long,
5725 it is sent in several bunches. This may happen even for shorter strings.
5726 Output from processes can arrive in between bunches. */)
5727 (Lisp_Object process
, Lisp_Object string
)
5730 CHECK_STRING (string
);
5731 proc
= get_process (process
);
5732 send_process (proc
, SSDATA (string
),
5733 SBYTES (string
), string
);
5737 /* Return the foreground process group for the tty/pty that
5738 the process P uses. */
5740 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5745 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5748 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5749 master side. Try the slave side. */
5750 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5754 ioctl (fd
, TIOCGPGRP
, &gid
);
5758 #endif /* defined (TIOCGPGRP ) */
5763 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5764 Sprocess_running_child_p
, 0, 1, 0,
5765 doc
: /* Return t if PROCESS has given the terminal to a child.
5766 If the operating system does not make it possible to find out,
5767 return t unconditionally. */)
5768 (Lisp_Object process
)
5770 /* Initialize in case ioctl doesn't exist or gives an error,
5771 in a way that will cause returning t. */
5774 struct Lisp_Process
*p
;
5776 proc
= get_process (process
);
5777 p
= XPROCESS (proc
);
5779 if (!EQ (p
->type
, Qreal
))
5780 error ("Process %s is not a subprocess",
5783 error ("Process %s is not active",
5786 gid
= emacs_get_tty_pgrp (p
);
5793 /* send a signal number SIGNO to PROCESS.
5794 If CURRENT_GROUP is t, that means send to the process group
5795 that currently owns the terminal being used to communicate with PROCESS.
5796 This is used for various commands in shell mode.
5797 If CURRENT_GROUP is lambda, that means send to the process group
5798 that currently owns the terminal, but only if it is NOT the shell itself.
5800 If NOMSG is zero, insert signal-announcements into process's buffers
5803 If we can, we try to signal PROCESS by sending control characters
5804 down the pty. This allows us to signal inferiors who have changed
5805 their uid, for which killpg would return an EPERM error. */
5808 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5812 register struct Lisp_Process
*p
;
5816 proc
= get_process (process
);
5817 p
= XPROCESS (proc
);
5819 if (!EQ (p
->type
, Qreal
))
5820 error ("Process %s is not a subprocess",
5823 error ("Process %s is not active",
5827 current_group
= Qnil
;
5829 /* If we are using pgrps, get a pgrp number and make it negative. */
5830 if (NILP (current_group
))
5831 /* Send the signal to the shell's process group. */
5835 #ifdef SIGNALS_VIA_CHARACTERS
5836 /* If possible, send signals to the entire pgrp
5837 by sending an input character to it. */
5840 cc_t
*sig_char
= NULL
;
5842 tcgetattr (p
->infd
, &t
);
5847 sig_char
= &t
.c_cc
[VINTR
];
5851 sig_char
= &t
.c_cc
[VQUIT
];
5855 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5856 sig_char
= &t
.c_cc
[VSWTCH
];
5858 sig_char
= &t
.c_cc
[VSUSP
];
5863 if (sig_char
&& *sig_char
!= CDISABLE
)
5865 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5868 /* If we can't send the signal with a character,
5869 fall through and send it another way. */
5871 /* The code above may fall through if it can't
5872 handle the signal. */
5873 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5876 /* Get the current pgrp using the tty itself, if we have that.
5877 Otherwise, use the pty to get the pgrp.
5878 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5879 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5880 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5881 His patch indicates that if TIOCGPGRP returns an error, then
5882 we should just assume that p->pid is also the process group id. */
5884 gid
= emacs_get_tty_pgrp (p
);
5887 /* If we can't get the information, assume
5888 the shell owns the tty. */
5891 /* It is not clear whether anything really can set GID to -1.
5892 Perhaps on some system one of those ioctls can or could do so.
5893 Or perhaps this is vestigial. */
5896 #else /* ! defined (TIOCGPGRP ) */
5897 /* Can't select pgrps on this system, so we know that
5898 the child itself heads the pgrp. */
5900 #endif /* ! defined (TIOCGPGRP ) */
5902 /* If current_group is lambda, and the shell owns the terminal,
5903 don't send any signal. */
5904 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5912 p
->raw_status_new
= 0;
5913 pset_status (p
, Qrun
);
5914 p
->tick
= ++process_tick
;
5917 status_notify (NULL
);
5918 redisplay_preserve_echo_area (13);
5921 #endif /* ! defined (SIGCONT) */
5925 flush_pending_output (p
->infd
);
5929 /* If we don't have process groups, send the signal to the immediate
5930 subprocess. That isn't really right, but it's better than any
5931 obvious alternative. */
5934 kill (p
->pid
, signo
);
5938 /* gid may be a pid, or minus a pgrp's number */
5940 if (!NILP (current_group
))
5942 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5943 EMACS_KILLPG (gid
, signo
);
5950 #else /* ! defined (TIOCSIGSEND) */
5951 EMACS_KILLPG (gid
, signo
);
5952 #endif /* ! defined (TIOCSIGSEND) */
5955 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5956 doc
: /* Interrupt process PROCESS.
5957 PROCESS may be a process, a buffer, or the name of a process or buffer.
5958 No arg or nil means current buffer's process.
5959 Second arg CURRENT-GROUP non-nil means send signal to
5960 the current process-group of the process's controlling terminal
5961 rather than to the process's own process group.
5962 If the process is a shell, this means interrupt current subjob
5963 rather than the shell.
5965 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5966 don't send the signal. */)
5967 (Lisp_Object process
, Lisp_Object current_group
)
5969 process_send_signal (process
, SIGINT
, current_group
, 0);
5973 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5974 doc
: /* Kill process PROCESS. May be process or name of one.
5975 See function `interrupt-process' for more details on usage. */)
5976 (Lisp_Object process
, Lisp_Object current_group
)
5978 process_send_signal (process
, SIGKILL
, current_group
, 0);
5982 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5983 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5984 See function `interrupt-process' for more details on usage. */)
5985 (Lisp_Object process
, Lisp_Object current_group
)
5987 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5991 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5992 doc
: /* Stop process PROCESS. May be process or name of one.
5993 See function `interrupt-process' for more details on usage.
5994 If PROCESS is a network or serial process, inhibit handling of incoming
5996 (Lisp_Object process
, Lisp_Object current_group
)
5998 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6000 struct Lisp_Process
*p
;
6002 p
= XPROCESS (process
);
6003 if (NILP (p
->command
)
6006 FD_CLR (p
->infd
, &input_wait_mask
);
6007 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6009 pset_command (p
, Qt
);
6013 error ("No SIGTSTP support");
6015 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6020 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6021 doc
: /* Continue process PROCESS. May be process or name of one.
6022 See function `interrupt-process' for more details on usage.
6023 If PROCESS is a network or serial process, resume handling of incoming
6025 (Lisp_Object process
, Lisp_Object current_group
)
6027 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6029 struct Lisp_Process
*p
;
6031 p
= XPROCESS (process
);
6032 if (EQ (p
->command
, Qt
)
6034 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6036 FD_SET (p
->infd
, &input_wait_mask
);
6037 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6039 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6040 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6041 #else /* not WINDOWSNT */
6042 tcflush (p
->infd
, TCIFLUSH
);
6043 #endif /* not WINDOWSNT */
6045 pset_command (p
, Qnil
);
6049 process_send_signal (process
, SIGCONT
, current_group
, 0);
6051 error ("No SIGCONT support");
6056 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6057 2, 2, "sProcess (name or number): \nnSignal code: ",
6058 doc
: /* Send PROCESS the signal with code SIGCODE.
6059 PROCESS may also be a number specifying the process id of the
6060 process to signal; in this case, the process need not be a child of
6062 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6063 (Lisp_Object process
, Lisp_Object sigcode
)
6067 if (STRINGP (process
))
6069 Lisp_Object tem
= Fget_process (process
);
6072 Lisp_Object process_number
=
6073 string_to_number (SSDATA (process
), 10, 1);
6074 if (INTEGERP (process_number
) || FLOATP (process_number
))
6075 tem
= process_number
;
6079 else if (!NUMBERP (process
))
6080 process
= get_process (process
);
6085 if (NUMBERP (process
))
6086 CONS_TO_INTEGER (process
, pid_t
, pid
);
6089 CHECK_PROCESS (process
);
6090 pid
= XPROCESS (process
)->pid
;
6092 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6095 #define parse_signal(NAME, VALUE) \
6096 else if (!xstrcasecmp (name, NAME)) \
6097 XSETINT (sigcode, VALUE)
6099 if (INTEGERP (sigcode
))
6100 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6105 CHECK_SYMBOL (sigcode
);
6106 name
= SSDATA (SYMBOL_NAME (sigcode
));
6108 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6114 parse_signal ("usr1", SIGUSR1
);
6117 parse_signal ("usr2", SIGUSR2
);
6119 parse_signal ("term", SIGTERM
);
6121 parse_signal ("hup", SIGHUP
);
6123 parse_signal ("int", SIGINT
);
6125 parse_signal ("quit", SIGQUIT
);
6127 parse_signal ("ill", SIGILL
);
6128 parse_signal ("abrt", SIGABRT
);
6130 parse_signal ("emt", SIGEMT
);
6133 parse_signal ("kill", SIGKILL
);
6135 parse_signal ("fpe", SIGFPE
);
6137 parse_signal ("bus", SIGBUS
);
6139 parse_signal ("segv", SIGSEGV
);
6141 parse_signal ("sys", SIGSYS
);
6144 parse_signal ("pipe", SIGPIPE
);
6147 parse_signal ("alrm", SIGALRM
);
6150 parse_signal ("urg", SIGURG
);
6153 parse_signal ("stop", SIGSTOP
);
6156 parse_signal ("tstp", SIGTSTP
);
6159 parse_signal ("cont", SIGCONT
);
6162 parse_signal ("chld", SIGCHLD
);
6165 parse_signal ("ttin", SIGTTIN
);
6168 parse_signal ("ttou", SIGTTOU
);
6171 parse_signal ("io", SIGIO
);
6174 parse_signal ("xcpu", SIGXCPU
);
6177 parse_signal ("xfsz", SIGXFSZ
);
6180 parse_signal ("vtalrm", SIGVTALRM
);
6183 parse_signal ("prof", SIGPROF
);
6186 parse_signal ("winch", SIGWINCH
);
6189 parse_signal ("info", SIGINFO
);
6192 error ("Undefined signal name %s", name
);
6197 return make_number (kill (pid
, XINT (sigcode
)));
6200 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6201 doc
: /* Make PROCESS see end-of-file in its input.
6202 EOF comes after any text already sent to it.
6203 PROCESS may be a process, a buffer, the name of a process or buffer, or
6204 nil, indicating the current buffer's process.
6205 If PROCESS is a network connection, or is a process communicating
6206 through a pipe (as opposed to a pty), then you cannot send any more
6207 text to PROCESS after you call this function.
6208 If PROCESS is a serial process, wait until all output written to the
6209 process has been transmitted to the serial port. */)
6210 (Lisp_Object process
)
6213 struct coding_system
*coding
;
6215 if (DATAGRAM_CONN_P (process
))
6218 proc
= get_process (process
);
6219 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6221 /* Make sure the process is really alive. */
6222 if (XPROCESS (proc
)->raw_status_new
)
6223 update_status (XPROCESS (proc
));
6224 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6225 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6227 if (CODING_REQUIRE_FLUSHING (coding
))
6229 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6230 send_process (proc
, "", 0, Qnil
);
6233 if (XPROCESS (proc
)->pty_flag
)
6234 send_process (proc
, "\004", 1, Qnil
);
6235 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6238 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6239 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6240 #endif /* not WINDOWSNT */
6241 /* Do nothing on Windows because writes are blocking. */
6245 int old_outfd
, new_outfd
;
6247 #ifdef HAVE_SHUTDOWN
6248 /* If this is a network connection, or socketpair is used
6249 for communication with the subprocess, call shutdown to cause EOF.
6250 (In some old system, shutdown to socketpair doesn't work.
6251 Then we just can't win.) */
6252 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6253 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6254 shutdown (XPROCESS (proc
)->outfd
, 1);
6255 /* In case of socketpair, outfd == infd, so don't close it. */
6256 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6257 emacs_close (XPROCESS (proc
)->outfd
);
6258 #else /* not HAVE_SHUTDOWN */
6259 emacs_close (XPROCESS (proc
)->outfd
);
6260 #endif /* not HAVE_SHUTDOWN */
6261 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6264 old_outfd
= XPROCESS (proc
)->outfd
;
6266 if (!proc_encode_coding_system
[new_outfd
])
6267 proc_encode_coding_system
[new_outfd
]
6268 = xmalloc (sizeof (struct coding_system
));
6269 *proc_encode_coding_system
[new_outfd
]
6270 = *proc_encode_coding_system
[old_outfd
];
6271 memset (proc_encode_coding_system
[old_outfd
], 0,
6272 sizeof (struct coding_system
));
6274 XPROCESS (proc
)->outfd
= new_outfd
;
6279 /* On receipt of a signal that a child status has changed, loop asking
6280 about children with changed statuses until the system says there
6283 All we do is change the status; we do not run sentinels or print
6284 notifications. That is saved for the next time keyboard input is
6285 done, in order to avoid timing errors.
6287 ** WARNING: this can be called during garbage collection.
6288 Therefore, it must not be fooled by the presence of mark bits in
6291 ** USG WARNING: Although it is not obvious from the documentation
6292 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6293 signal() before executing at least one wait(), otherwise the
6294 handler will be called again, resulting in an infinite loop. The
6295 relevant portion of the documentation reads "SIGCLD signals will be
6296 queued and the signal-catching function will be continually
6297 reentered until the queue is empty". Invoking signal() causes the
6298 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6301 ** Malloc WARNING: This should never call malloc either directly or
6302 indirectly; if it does, that is a bug */
6304 /* Record the changed status of the child process PID with wait status W. */
6306 record_child_status_change (pid_t pid
, int w
)
6310 struct Lisp_Process
*p
;
6313 /* Find the process that signaled us, and record its status. */
6315 /* The process can have been deleted by Fdelete_process. */
6316 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6318 Lisp_Object xpid
= XCAR (tail
);
6319 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6320 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6322 XSETCAR (tail
, Qnil
);
6327 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6329 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6331 proc
= XCDR (XCAR (tail
));
6332 p
= XPROCESS (proc
);
6333 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6338 /* Look for an asynchronous process whose pid hasn't been filled
6341 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6343 proc
= XCDR (XCAR (tail
));
6344 p
= XPROCESS (proc
);
6350 /* Change the status of the process that was found. */
6353 int clear_desc_flag
= 0;
6355 p
->tick
= ++process_tick
;
6357 p
->raw_status_new
= 1;
6359 /* If process has terminated, stop waiting for its output. */
6360 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6362 clear_desc_flag
= 1;
6364 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6365 if (clear_desc_flag
)
6367 FD_CLR (p
->infd
, &input_wait_mask
);
6368 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6371 /* Tell wait_reading_process_output that it needs to wake up and
6373 if (input_available_clear_time
)
6374 *input_available_clear_time
= make_emacs_time (0, 0);
6376 /* There was no asynchronous process found for that pid: we have
6377 a synchronous process. */
6380 synch_process_alive
= 0;
6382 /* Report the status of the synchronous process. */
6384 synch_process_retcode
= WEXITSTATUS (w
);
6385 else if (WIFSIGNALED (w
))
6386 synch_process_termsig
= WTERMSIG (w
);
6388 /* Tell wait_reading_process_output that it needs to wake up and
6390 if (input_available_clear_time
)
6391 *input_available_clear_time
= make_emacs_time (0, 0);
6398 /* On some systems, the SIGCHLD handler must return right away. If
6399 any more processes want to signal us, we will get another signal.
6400 Otherwise, loop around to use up all the processes that have
6401 something to tell us. */
6402 #if (defined WINDOWSNT \
6403 || (defined USG && !defined GNU_LINUX \
6404 && !(defined HPUX && defined WNOHANG)))
6405 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 0 };
6407 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 1 };
6411 handle_child_signal (int sig
)
6419 pid
= waitpid (-1, &status
, WNOHANG
| WUNTRACED
);
6420 while (pid
< 0 && errno
== EINTR
);
6422 /* PID == 0 means no processes found, PID == -1 means a real failure.
6423 Either way, we have done all our job. */
6427 record_child_status_change (pid
, status
);
6429 while (CAN_HANDLE_MULTIPLE_CHILDREN
);
6433 deliver_child_signal (int sig
)
6435 deliver_process_signal (sig
, handle_child_signal
);
6438 #endif /* SIGCHLD */
6442 exec_sentinel_unwind (Lisp_Object data
)
6444 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6449 exec_sentinel_error_handler (Lisp_Object error_val
)
6451 cmd_error_internal (error_val
, "error in process sentinel: ");
6453 update_echo_area ();
6454 Fsleep_for (make_number (2), Qnil
);
6459 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6461 Lisp_Object sentinel
, odeactivate
;
6462 struct Lisp_Process
*p
= XPROCESS (proc
);
6463 ptrdiff_t count
= SPECPDL_INDEX ();
6464 bool outer_running_asynch_code
= running_asynch_code
;
6465 int waiting
= waiting_for_user_input_p
;
6467 if (inhibit_sentinels
)
6470 /* No need to gcpro these, because all we do with them later
6471 is test them for EQness, and none of them should be a string. */
6472 odeactivate
= Vdeactivate_mark
;
6474 Lisp_Object obuffer
, okeymap
;
6475 XSETBUFFER (obuffer
, current_buffer
);
6476 okeymap
= BVAR (current_buffer
, keymap
);
6479 /* There's no good reason to let sentinels change the current
6480 buffer, and many callers of accept-process-output, sit-for, and
6481 friends don't expect current-buffer to be changed from under them. */
6482 record_unwind_current_buffer ();
6484 sentinel
= p
->sentinel
;
6485 if (NILP (sentinel
))
6488 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6489 assure that it gets restored no matter how the sentinel exits. */
6490 pset_sentinel (p
, Qnil
);
6491 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6492 /* Inhibit quit so that random quits don't screw up a running filter. */
6493 specbind (Qinhibit_quit
, Qt
);
6494 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6496 /* In case we get recursively called,
6497 and we already saved the match data nonrecursively,
6498 save the same match data in safely recursive fashion. */
6499 if (outer_running_asynch_code
)
6502 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6503 restore_search_regs ();
6504 record_unwind_save_match_data ();
6505 Fset_match_data (tem
, Qt
);
6508 /* For speed, if a search happens within this code,
6509 save the match data in a special nonrecursive fashion. */
6510 running_asynch_code
= 1;
6512 internal_condition_case_1 (read_process_output_call
,
6514 Fcons (proc
, Fcons (reason
, Qnil
))),
6515 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6516 exec_sentinel_error_handler
);
6518 /* If we saved the match data nonrecursively, restore it now. */
6519 restore_search_regs ();
6520 running_asynch_code
= outer_running_asynch_code
;
6522 Vdeactivate_mark
= odeactivate
;
6524 /* Restore waiting_for_user_input_p as it was
6525 when we were called, in case the filter clobbered it. */
6526 waiting_for_user_input_p
= waiting
;
6529 if (! EQ (Fcurrent_buffer (), obuffer
)
6530 || ! EQ (current_buffer
->keymap
, okeymap
))
6532 /* But do it only if the caller is actually going to read events.
6533 Otherwise there's no need to make him wake up, and it could
6534 cause trouble (for example it would make sit_for return). */
6535 if (waiting_for_user_input_p
== -1)
6536 record_asynch_buffer_change ();
6538 unbind_to (count
, Qnil
);
6541 /* Report all recent events of a change in process status
6542 (either run the sentinel or output a message).
6543 This is usually done while Emacs is waiting for keyboard input
6544 but can be done at other times. */
6547 status_notify (struct Lisp_Process
*deleting_process
)
6549 register Lisp_Object proc
, buffer
;
6550 Lisp_Object tail
, msg
;
6551 struct gcpro gcpro1
, gcpro2
;
6555 /* We need to gcpro tail; if read_process_output calls a filter
6556 which deletes a process and removes the cons to which tail points
6557 from Vprocess_alist, and then causes a GC, tail is an unprotected
6561 /* Set this now, so that if new processes are created by sentinels
6562 that we run, we get called again to handle their status changes. */
6563 update_tick
= process_tick
;
6565 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6568 register struct Lisp_Process
*p
;
6570 proc
= Fcdr (XCAR (tail
));
6571 p
= XPROCESS (proc
);
6573 if (p
->tick
!= p
->update_tick
)
6575 p
->update_tick
= p
->tick
;
6577 /* If process is still active, read any output that remains. */
6578 while (! EQ (p
->filter
, Qt
)
6579 && ! EQ (p
->status
, Qconnect
)
6580 && ! EQ (p
->status
, Qlisten
)
6581 /* Network or serial process not stopped: */
6582 && ! EQ (p
->command
, Qt
)
6584 && p
!= deleting_process
6585 && read_process_output (proc
, p
->infd
) > 0);
6589 /* Get the text to use for the message. */
6590 if (p
->raw_status_new
)
6592 msg
= status_message (p
);
6594 /* If process is terminated, deactivate it or delete it. */
6596 if (CONSP (p
->status
))
6597 symbol
= XCAR (p
->status
);
6599 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6600 || EQ (symbol
, Qclosed
))
6602 if (delete_exited_processes
)
6603 remove_process (proc
);
6605 deactivate_process (proc
);
6608 /* The actions above may have further incremented p->tick.
6609 So set p->update_tick again
6610 so that an error in the sentinel will not cause
6611 this code to be run again. */
6612 p
->update_tick
= p
->tick
;
6613 /* Now output the message suitably. */
6614 if (!NILP (p
->sentinel
))
6615 exec_sentinel (proc
, msg
);
6616 /* Don't bother with a message in the buffer
6617 when a process becomes runnable. */
6618 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6621 struct buffer
*old
= current_buffer
;
6622 ptrdiff_t opoint
, opoint_byte
;
6623 ptrdiff_t before
, before_byte
;
6625 /* Avoid error if buffer is deleted
6626 (probably that's why the process is dead, too) */
6627 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6629 Fset_buffer (buffer
);
6632 opoint_byte
= PT_BYTE
;
6633 /* Insert new output into buffer
6634 at the current end-of-output marker,
6635 thus preserving logical ordering of input and output. */
6636 if (XMARKER (p
->mark
)->buffer
)
6637 Fgoto_char (p
->mark
);
6639 SET_PT_BOTH (ZV
, ZV_BYTE
);
6642 before_byte
= PT_BYTE
;
6644 tem
= BVAR (current_buffer
, read_only
);
6645 bset_read_only (current_buffer
, Qnil
);
6646 insert_string ("\nProcess ");
6647 { /* FIXME: temporary kludge */
6648 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6649 insert_string (" ");
6651 bset_read_only (current_buffer
, tem
);
6652 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6654 if (opoint
>= before
)
6655 SET_PT_BOTH (opoint
+ (PT
- before
),
6656 opoint_byte
+ (PT_BYTE
- before_byte
));
6658 SET_PT_BOTH (opoint
, opoint_byte
);
6660 set_buffer_internal (old
);
6665 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6670 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6671 Sset_process_coding_system
, 1, 3, 0,
6672 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6673 DECODING will be used to decode subprocess output and ENCODING to
6674 encode subprocess input. */)
6675 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6677 register struct Lisp_Process
*p
;
6679 CHECK_PROCESS (process
);
6680 p
= XPROCESS (process
);
6682 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6684 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6685 Fcheck_coding_system (decoding
);
6686 Fcheck_coding_system (encoding
);
6687 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6688 pset_decode_coding_system (p
, decoding
);
6689 pset_encode_coding_system (p
, encoding
);
6690 setup_process_coding_systems (process
);
6695 DEFUN ("process-coding-system",
6696 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6697 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6698 (register Lisp_Object process
)
6700 CHECK_PROCESS (process
);
6701 return Fcons (XPROCESS (process
)->decode_coding_system
,
6702 XPROCESS (process
)->encode_coding_system
);
6705 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6706 Sset_process_filter_multibyte
, 2, 2, 0,
6707 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6708 If FLAG is non-nil, the filter is given multibyte strings.
6709 If FLAG is nil, the filter is given unibyte strings. In this case,
6710 all character code conversion except for end-of-line conversion is
6712 (Lisp_Object process
, Lisp_Object flag
)
6714 register struct Lisp_Process
*p
;
6716 CHECK_PROCESS (process
);
6717 p
= XPROCESS (process
);
6719 pset_decode_coding_system
6720 (p
, raw_text_coding_system (p
->decode_coding_system
));
6721 setup_process_coding_systems (process
);
6726 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6727 Sprocess_filter_multibyte_p
, 1, 1, 0,
6728 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6729 (Lisp_Object process
)
6731 register struct Lisp_Process
*p
;
6732 struct coding_system
*coding
;
6734 CHECK_PROCESS (process
);
6735 p
= XPROCESS (process
);
6736 coding
= proc_decode_coding_system
[p
->infd
];
6737 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6746 add_gpm_wait_descriptor (int desc
)
6748 add_keyboard_wait_descriptor (desc
);
6752 delete_gpm_wait_descriptor (int desc
)
6754 delete_keyboard_wait_descriptor (desc
);
6759 # ifdef USABLE_SIGIO
6761 /* Return nonzero if *MASK has a bit set
6762 that corresponds to one of the keyboard input descriptors. */
6765 keyboard_bit_set (fd_set
*mask
)
6769 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6770 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6771 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6778 #else /* not subprocesses */
6780 /* Defined on msdos.c. */
6781 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6782 EMACS_TIME
*, void *);
6784 /* Implementation of wait_reading_process_output, assuming that there
6785 are no subprocesses. Used only by the MS-DOS build.
6787 Wait for timeout to elapse and/or keyboard input to be available.
6791 If negative, gobble data immediately available but don't wait for any.
6794 an additional duration to wait, measured in nanoseconds
6795 If TIME_LIMIT is zero, then:
6796 If NSECS == 0, there is no limit.
6797 If NSECS > 0, the timeout consists of NSECS only.
6798 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6801 0 to ignore keyboard input, or
6802 1 to return when input is available, or
6803 -1 means caller will actually read the input, so don't throw to
6806 see full version for other parameters. We know that wait_proc will
6807 always be NULL, since `subprocesses' isn't defined.
6809 DO_DISPLAY means redisplay should be done to show subprocess
6810 output that arrives.
6812 Return true if we received input from any process. */
6815 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6817 Lisp_Object wait_for_cell
,
6818 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6821 EMACS_TIME end_time
, timeout
;
6828 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6829 time_limit
= TYPE_MAXIMUM (time_t);
6831 /* What does time_limit really mean? */
6832 if (time_limit
|| 0 < nsecs
)
6834 timeout
= make_emacs_time (time_limit
, nsecs
);
6835 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6838 /* Turn off periodic alarms (in case they are in use)
6839 and then turn off any other atimers,
6840 because the select emulator uses alarms. */
6842 turn_on_atimers (0);
6846 int timeout_reduced_for_timers
= 0;
6847 SELECT_TYPE waitchannels
;
6850 /* If calling from keyboard input, do not quit
6851 since we want to return C-g as an input character.
6852 Otherwise, do pending quit if requested. */
6856 /* Exit now if the cell we're waiting for became non-nil. */
6857 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6860 /* Compute time from now till when time limit is up */
6861 /* Exit if already run out */
6864 /* A negative timeout means
6865 gobble output available now
6866 but don't wait at all. */
6868 timeout
= make_emacs_time (0, 0);
6870 else if (time_limit
|| 0 < nsecs
)
6872 EMACS_TIME now
= current_emacs_time ();
6873 if (EMACS_TIME_LE (end_time
, now
))
6875 timeout
= sub_emacs_time (end_time
, now
);
6879 timeout
= make_emacs_time (100000, 0);
6882 /* If our caller will not immediately handle keyboard events,
6883 run timer events directly.
6884 (Callers that will immediately read keyboard events
6885 call timer_delay on their own.) */
6886 if (NILP (wait_for_cell
))
6888 EMACS_TIME timer_delay
;
6892 unsigned old_timers_run
= timers_run
;
6893 timer_delay
= timer_check ();
6894 if (timers_run
!= old_timers_run
&& do_display
)
6895 /* We must retry, since a timer may have requeued itself
6896 and that could alter the time delay. */
6897 redisplay_preserve_echo_area (14);
6901 while (!detect_input_pending ());
6903 /* If there is unread keyboard input, also return. */
6905 && requeued_events_pending_p ())
6908 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6910 if (EMACS_TIME_LT (timer_delay
, timeout
))
6912 timeout
= timer_delay
;
6913 timeout_reduced_for_timers
= 1;
6918 /* Cause C-g and alarm signals to take immediate action,
6919 and cause input available signals to zero out timeout. */
6921 set_waiting_for_input (&timeout
);
6923 /* If a frame has been newly mapped and needs updating,
6924 reprocess its display stuff. */
6925 if (frame_garbaged
&& do_display
)
6927 clear_waiting_for_input ();
6928 redisplay_preserve_echo_area (15);
6930 set_waiting_for_input (&timeout
);
6933 /* Wait till there is something to do. */
6934 FD_ZERO (&waitchannels
);
6935 if (read_kbd
&& detect_input_pending ())
6939 if (read_kbd
|| !NILP (wait_for_cell
))
6940 FD_SET (0, &waitchannels
);
6941 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6946 /* Make C-g and alarm signals set flags again */
6947 clear_waiting_for_input ();
6949 /* If we woke up due to SIGWINCH, actually change size now. */
6950 do_pending_window_change (0);
6952 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6953 /* We waited the full specified time, so return now. */
6958 /* If the system call was interrupted, then go around the
6960 if (xerrno
== EINTR
)
6961 FD_ZERO (&waitchannels
);
6963 error ("select error: %s", emacs_strerror (xerrno
));
6966 /* Check for keyboard input */
6969 && detect_input_pending_run_timers (do_display
))
6971 swallow_events (do_display
);
6972 if (detect_input_pending_run_timers (do_display
))
6976 /* If there is unread keyboard input, also return. */
6978 && requeued_events_pending_p ())
6981 /* If wait_for_cell. check for keyboard input
6982 but don't run any timers.
6983 ??? (It seems wrong to me to check for keyboard
6984 input at all when wait_for_cell, but the code
6985 has been this way since July 1994.
6986 Try changing this after version 19.31.) */
6987 if (! NILP (wait_for_cell
)
6988 && detect_input_pending ())
6990 swallow_events (do_display
);
6991 if (detect_input_pending ())
6995 /* Exit now if the cell we're waiting for became non-nil. */
6996 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7005 #endif /* not subprocesses */
7007 /* The following functions are needed even if async subprocesses are
7008 not supported. Some of them are no-op stubs in that case. */
7010 /* Add DESC to the set of keyboard input descriptors. */
7013 add_keyboard_wait_descriptor (int desc
)
7015 #ifdef subprocesses /* actually means "not MSDOS" */
7016 FD_SET (desc
, &input_wait_mask
);
7017 FD_SET (desc
, &non_process_wait_mask
);
7018 if (desc
> max_input_desc
)
7019 max_input_desc
= desc
;
7023 /* From now on, do not expect DESC to give keyboard input. */
7026 delete_keyboard_wait_descriptor (int desc
)
7030 int lim
= max_input_desc
;
7032 FD_CLR (desc
, &input_wait_mask
);
7033 FD_CLR (desc
, &non_process_wait_mask
);
7035 if (desc
== max_input_desc
)
7036 for (fd
= 0; fd
< lim
; fd
++)
7037 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7038 max_input_desc
= fd
;
7042 /* Setup coding systems of PROCESS. */
7045 setup_process_coding_systems (Lisp_Object process
)
7048 struct Lisp_Process
*p
= XPROCESS (process
);
7050 int outch
= p
->outfd
;
7051 Lisp_Object coding_system
;
7053 if (inch
< 0 || outch
< 0)
7056 if (!proc_decode_coding_system
[inch
])
7057 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7058 coding_system
= p
->decode_coding_system
;
7059 if (! NILP (p
->filter
))
7061 else if (BUFFERP (p
->buffer
))
7063 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7064 coding_system
= raw_text_coding_system (coding_system
);
7066 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7068 if (!proc_encode_coding_system
[outch
])
7069 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7070 setup_coding_system (p
->encode_coding_system
,
7071 proc_encode_coding_system
[outch
]);
7075 /* Close all descriptors currently in use for communication
7076 with subprocess. This is used in a newly-forked subprocess
7077 to get rid of irrelevant descriptors. */
7080 close_process_descs (void)
7084 for (i
= 0; i
< MAXDESC
; i
++)
7086 Lisp_Object process
;
7087 process
= chan_process
[i
];
7088 if (!NILP (process
))
7090 int in
= XPROCESS (process
)->infd
;
7091 int out
= XPROCESS (process
)->outfd
;
7094 if (out
>= 0 && in
!= out
)
7101 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7102 doc
: /* Return the (or a) process associated with BUFFER.
7103 BUFFER may be a buffer or the name of one. */)
7104 (register Lisp_Object buffer
)
7107 register Lisp_Object buf
, tail
, proc
;
7109 if (NILP (buffer
)) return Qnil
;
7110 buf
= Fget_buffer (buffer
);
7111 if (NILP (buf
)) return Qnil
;
7113 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7115 proc
= Fcdr (XCAR (tail
));
7116 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7119 #endif /* subprocesses */
7123 DEFUN ("process-inherit-coding-system-flag",
7124 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7126 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7127 If this flag is t, `buffer-file-coding-system' of the buffer
7128 associated with PROCESS will inherit the coding system used to decode
7129 the process output. */)
7130 (register Lisp_Object process
)
7133 CHECK_PROCESS (process
);
7134 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7136 /* Ignore the argument and return the value of
7137 inherit-process-coding-system. */
7138 return inherit_process_coding_system
? Qt
: Qnil
;
7142 /* Kill all processes associated with `buffer'.
7143 If `buffer' is nil, kill all processes */
7146 kill_buffer_processes (Lisp_Object buffer
)
7149 Lisp_Object tail
, proc
;
7151 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7153 proc
= XCDR (XCAR (tail
));
7155 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7157 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7158 Fdelete_process (proc
);
7159 else if (XPROCESS (proc
)->infd
>= 0)
7160 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7163 #else /* subprocesses */
7164 /* Since we have no subprocesses, this does nothing. */
7165 #endif /* subprocesses */
7168 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7169 Swaiting_for_user_input_p
, 0, 0, 0,
7170 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7171 This is intended for use by asynchronous process output filters and sentinels. */)
7175 return (waiting_for_user_input_p
? Qt
: Qnil
);
7181 /* Stop reading input from keyboard sources. */
7184 hold_keyboard_input (void)
7189 /* Resume reading input from keyboard sources. */
7192 unhold_keyboard_input (void)
7197 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7200 kbd_on_hold_p (void)
7202 return kbd_is_on_hold
;
7206 /* Enumeration of and access to system processes a-la ps(1). */
7208 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7210 doc
: /* Return a list of numerical process IDs of all running processes.
7211 If this functionality is unsupported, return nil.
7213 See `process-attributes' for getting attributes of a process given its ID. */)
7216 return list_system_processes ();
7219 DEFUN ("process-attributes", Fprocess_attributes
,
7220 Sprocess_attributes
, 1, 1, 0,
7221 doc
: /* Return attributes of the process given by its PID, a number.
7223 Value is an alist where each element is a cons cell of the form
7227 If this functionality is unsupported, the value is nil.
7229 See `list-system-processes' for getting a list of all process IDs.
7231 The KEYs of the attributes that this function may return are listed
7232 below, together with the type of the associated VALUE (in parentheses).
7233 Not all platforms support all of these attributes; unsupported
7234 attributes will not appear in the returned alist.
7235 Unless explicitly indicated otherwise, numbers can have either
7236 integer or floating point values.
7238 euid -- Effective user User ID of the process (number)
7239 user -- User name corresponding to euid (string)
7240 egid -- Effective user Group ID of the process (number)
7241 group -- Group name corresponding to egid (string)
7242 comm -- Command name (executable name only) (string)
7243 state -- Process state code, such as "S", "R", or "T" (string)
7244 ppid -- Parent process ID (number)
7245 pgrp -- Process group ID (number)
7246 sess -- Session ID, i.e. process ID of session leader (number)
7247 ttname -- Controlling tty name (string)
7248 tpgid -- ID of foreground process group on the process's tty (number)
7249 minflt -- number of minor page faults (number)
7250 majflt -- number of major page faults (number)
7251 cminflt -- cumulative number of minor page faults (number)
7252 cmajflt -- cumulative number of major page faults (number)
7253 utime -- user time used by the process, in (current-time) format,
7254 which is a list of integers (HIGH LOW USEC PSEC)
7255 stime -- system time used by the process (current-time)
7256 time -- sum of utime and stime (current-time)
7257 cutime -- user time used by the process and its children (current-time)
7258 cstime -- system time used by the process and its children (current-time)
7259 ctime -- sum of cutime and cstime (current-time)
7260 pri -- priority of the process (number)
7261 nice -- nice value of the process (number)
7262 thcount -- process thread count (number)
7263 start -- time the process started (current-time)
7264 vsize -- virtual memory size of the process in KB's (number)
7265 rss -- resident set size of the process in KB's (number)
7266 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7267 pcpu -- percents of CPU time used by the process (floating-point number)
7268 pmem -- percents of total physical memory used by process's resident set
7269 (floating-point number)
7270 args -- command line which invoked the process (string). */)
7273 return system_process_attributes (pid
);
7277 /* This is not called "init_process" because that is the name of a
7278 Mach system call, so it would cause problems on Darwin systems. */
7280 init_process_emacs (void)
7285 inhibit_sentinels
= 0;
7289 if (! noninteractive
|| initialized
)
7292 struct sigaction action
;
7293 emacs_sigaction_init (&action
, deliver_child_signal
);
7294 sigaction (SIGCHLD
, &action
, 0);
7298 FD_ZERO (&input_wait_mask
);
7299 FD_ZERO (&non_keyboard_wait_mask
);
7300 FD_ZERO (&non_process_wait_mask
);
7301 FD_ZERO (&write_mask
);
7302 max_process_desc
= 0;
7303 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7305 #ifdef NON_BLOCKING_CONNECT
7306 FD_ZERO (&connect_wait_mask
);
7307 num_pending_connects
= 0;
7310 #ifdef ADAPTIVE_READ_BUFFERING
7311 process_output_delay_count
= 0;
7312 process_output_skip
= 0;
7315 /* Don't do this, it caused infinite select loops. The display
7316 method should call add_keyboard_wait_descriptor on stdin if it
7319 FD_SET (0, &input_wait_mask
);
7322 Vprocess_alist
= Qnil
;
7324 deleted_pid_list
= Qnil
;
7326 for (i
= 0; i
< MAXDESC
; i
++)
7328 chan_process
[i
] = Qnil
;
7329 proc_buffered_char
[i
] = -1;
7331 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7332 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7333 #ifdef DATAGRAM_SOCKETS
7334 memset (datagram_address
, 0, sizeof datagram_address
);
7338 Lisp_Object subfeatures
= Qnil
;
7339 const struct socket_options
*sopt
;
7341 #define ADD_SUBFEATURE(key, val) \
7342 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7344 #ifdef NON_BLOCKING_CONNECT
7345 ADD_SUBFEATURE (QCnowait
, Qt
);
7347 #ifdef DATAGRAM_SOCKETS
7348 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7350 #ifdef HAVE_SEQPACKET
7351 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7353 #ifdef HAVE_LOCAL_SOCKETS
7354 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7356 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7358 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7360 #ifdef HAVE_GETSOCKNAME
7361 ADD_SUBFEATURE (QCservice
, Qt
);
7363 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7364 ADD_SUBFEATURE (QCserver
, Qt
);
7367 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7368 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7370 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7373 #if defined (DARWIN_OS)
7374 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7375 processes. As such, we only change the default value. */
7378 char const *release
= (STRINGP (Voperating_system_release
)
7379 ? SSDATA (Voperating_system_release
)
7381 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7382 Vprocess_connection_type
= Qnil
;
7386 #endif /* subprocesses */
7391 syms_of_process (void)
7395 DEFSYM (Qprocessp
, "processp");
7396 DEFSYM (Qrun
, "run");
7397 DEFSYM (Qstop
, "stop");
7398 DEFSYM (Qsignal
, "signal");
7400 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7403 Qexit = intern_c_string ("exit");
7404 staticpro (&Qexit); */
7406 DEFSYM (Qopen
, "open");
7407 DEFSYM (Qclosed
, "closed");
7408 DEFSYM (Qconnect
, "connect");
7409 DEFSYM (Qfailed
, "failed");
7410 DEFSYM (Qlisten
, "listen");
7411 DEFSYM (Qlocal
, "local");
7412 DEFSYM (Qipv4
, "ipv4");
7414 DEFSYM (Qipv6
, "ipv6");
7416 DEFSYM (Qdatagram
, "datagram");
7417 DEFSYM (Qseqpacket
, "seqpacket");
7419 DEFSYM (QCport
, ":port");
7420 DEFSYM (QCspeed
, ":speed");
7421 DEFSYM (QCprocess
, ":process");
7423 DEFSYM (QCbytesize
, ":bytesize");
7424 DEFSYM (QCstopbits
, ":stopbits");
7425 DEFSYM (QCparity
, ":parity");
7426 DEFSYM (Qodd
, "odd");
7427 DEFSYM (Qeven
, "even");
7428 DEFSYM (QCflowcontrol
, ":flowcontrol");
7431 DEFSYM (QCsummary
, ":summary");
7433 DEFSYM (Qreal
, "real");
7434 DEFSYM (Qnetwork
, "network");
7435 DEFSYM (Qserial
, "serial");
7436 DEFSYM (QCbuffer
, ":buffer");
7437 DEFSYM (QChost
, ":host");
7438 DEFSYM (QCservice
, ":service");
7439 DEFSYM (QClocal
, ":local");
7440 DEFSYM (QCremote
, ":remote");
7441 DEFSYM (QCcoding
, ":coding");
7442 DEFSYM (QCserver
, ":server");
7443 DEFSYM (QCnowait
, ":nowait");
7444 DEFSYM (QCsentinel
, ":sentinel");
7445 DEFSYM (QClog
, ":log");
7446 DEFSYM (QCnoquery
, ":noquery");
7447 DEFSYM (QCstop
, ":stop");
7448 DEFSYM (QCoptions
, ":options");
7449 DEFSYM (QCplist
, ":plist");
7451 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7453 staticpro (&Vprocess_alist
);
7455 staticpro (&deleted_pid_list
);
7458 #endif /* subprocesses */
7460 DEFSYM (QCname
, ":name");
7461 DEFSYM (QCtype
, ":type");
7463 DEFSYM (Qeuid
, "euid");
7464 DEFSYM (Qegid
, "egid");
7465 DEFSYM (Quser
, "user");
7466 DEFSYM (Qgroup
, "group");
7467 DEFSYM (Qcomm
, "comm");
7468 DEFSYM (Qstate
, "state");
7469 DEFSYM (Qppid
, "ppid");
7470 DEFSYM (Qpgrp
, "pgrp");
7471 DEFSYM (Qsess
, "sess");
7472 DEFSYM (Qttname
, "ttname");
7473 DEFSYM (Qtpgid
, "tpgid");
7474 DEFSYM (Qminflt
, "minflt");
7475 DEFSYM (Qmajflt
, "majflt");
7476 DEFSYM (Qcminflt
, "cminflt");
7477 DEFSYM (Qcmajflt
, "cmajflt");
7478 DEFSYM (Qutime
, "utime");
7479 DEFSYM (Qstime
, "stime");
7480 DEFSYM (Qtime
, "time");
7481 DEFSYM (Qcutime
, "cutime");
7482 DEFSYM (Qcstime
, "cstime");
7483 DEFSYM (Qctime
, "ctime");
7484 DEFSYM (Qpri
, "pri");
7485 DEFSYM (Qnice
, "nice");
7486 DEFSYM (Qthcount
, "thcount");
7487 DEFSYM (Qstart
, "start");
7488 DEFSYM (Qvsize
, "vsize");
7489 DEFSYM (Qrss
, "rss");
7490 DEFSYM (Qetime
, "etime");
7491 DEFSYM (Qpcpu
, "pcpu");
7492 DEFSYM (Qpmem
, "pmem");
7493 DEFSYM (Qargs
, "args");
7495 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7496 doc
: /* Non-nil means delete processes immediately when they exit.
7497 A value of nil means don't delete them until `list-processes' is run. */);
7499 delete_exited_processes
= 1;
7502 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7503 doc
: /* Control type of device used to communicate with subprocesses.
7504 Values are nil to use a pipe, or t or `pty' to use a pty.
7505 The value has no effect if the system has no ptys or if all ptys are busy:
7506 then a pipe is used in any case.
7507 The value takes effect when `start-process' is called. */);
7508 Vprocess_connection_type
= Qt
;
7510 #ifdef ADAPTIVE_READ_BUFFERING
7511 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7512 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7513 On some systems, when Emacs reads the output from a subprocess, the output data
7514 is read in very small blocks, potentially resulting in very poor performance.
7515 This behavior can be remedied to some extent by setting this variable to a
7516 non-nil value, as it will automatically delay reading from such processes, to
7517 allow them to produce more output before Emacs tries to read it.
7518 If the value is t, the delay is reset after each write to the process; any other
7519 non-nil value means that the delay is not reset on write.
7520 The variable takes effect when `start-process' is called. */);
7521 Vprocess_adaptive_read_buffering
= Qt
;
7524 defsubr (&Sprocessp
);
7525 defsubr (&Sget_process
);
7526 defsubr (&Sdelete_process
);
7527 defsubr (&Sprocess_status
);
7528 defsubr (&Sprocess_exit_status
);
7529 defsubr (&Sprocess_id
);
7530 defsubr (&Sprocess_name
);
7531 defsubr (&Sprocess_tty_name
);
7532 defsubr (&Sprocess_command
);
7533 defsubr (&Sset_process_buffer
);
7534 defsubr (&Sprocess_buffer
);
7535 defsubr (&Sprocess_mark
);
7536 defsubr (&Sset_process_filter
);
7537 defsubr (&Sprocess_filter
);
7538 defsubr (&Sset_process_sentinel
);
7539 defsubr (&Sprocess_sentinel
);
7540 defsubr (&Sset_process_window_size
);
7541 defsubr (&Sset_process_inherit_coding_system_flag
);
7542 defsubr (&Sset_process_query_on_exit_flag
);
7543 defsubr (&Sprocess_query_on_exit_flag
);
7544 defsubr (&Sprocess_contact
);
7545 defsubr (&Sprocess_plist
);
7546 defsubr (&Sset_process_plist
);
7547 defsubr (&Sprocess_list
);
7548 defsubr (&Sstart_process
);
7549 defsubr (&Sserial_process_configure
);
7550 defsubr (&Smake_serial_process
);
7551 defsubr (&Sset_network_process_option
);
7552 defsubr (&Smake_network_process
);
7553 defsubr (&Sformat_network_address
);
7554 #if defined (HAVE_NET_IF_H)
7556 defsubr (&Snetwork_interface_list
);
7558 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7559 defsubr (&Snetwork_interface_info
);
7561 #endif /* defined (HAVE_NET_IF_H) */
7562 #ifdef DATAGRAM_SOCKETS
7563 defsubr (&Sprocess_datagram_address
);
7564 defsubr (&Sset_process_datagram_address
);
7566 defsubr (&Saccept_process_output
);
7567 defsubr (&Sprocess_send_region
);
7568 defsubr (&Sprocess_send_string
);
7569 defsubr (&Sinterrupt_process
);
7570 defsubr (&Skill_process
);
7571 defsubr (&Squit_process
);
7572 defsubr (&Sstop_process
);
7573 defsubr (&Scontinue_process
);
7574 defsubr (&Sprocess_running_child_p
);
7575 defsubr (&Sprocess_send_eof
);
7576 defsubr (&Ssignal_process
);
7577 defsubr (&Swaiting_for_user_input_p
);
7578 defsubr (&Sprocess_type
);
7579 defsubr (&Sset_process_coding_system
);
7580 defsubr (&Sprocess_coding_system
);
7581 defsubr (&Sset_process_filter_multibyte
);
7582 defsubr (&Sprocess_filter_multibyte_p
);
7584 #endif /* subprocesses */
7586 defsubr (&Sget_buffer_process
);
7587 defsubr (&Sprocess_inherit_coding_system_flag
);
7588 defsubr (&Slist_system_processes
);
7589 defsubr (&Sprocess_attributes
);