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 O_NONBLOCK || 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 (faccessat (AT_FDCWD
, pty_name
, R_OK
| W_OK
, AT_EACCESS
) != 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 */
1763 /* It's very important to call setpgrp here and no time
1764 afterwards. Otherwise, we lose our controlling tty which
1765 is set when we open the pty. */
1768 #endif /* not HAVE_SETSID */
1769 #if defined (LDISC1)
1770 if (pty_flag
&& xforkin
>= 0)
1773 tcgetattr (xforkin
, &t
);
1775 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1776 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1779 #if defined (NTTYDISC) && defined (TIOCSETD)
1780 if (pty_flag
&& xforkin
>= 0)
1782 /* Use new line discipline. */
1783 int ldisc
= NTTYDISC
;
1784 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1789 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1790 can do TIOCSPGRP only to the process's controlling tty. */
1793 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1794 I can't test it since I don't have 4.3. */
1795 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1798 ioctl (j
, TIOCNOTTY
, 0);
1802 /* In order to get a controlling terminal on some versions
1803 of BSD, it is necessary to put the process in pgrp 0
1804 before it opens the terminal. */
1812 #endif /* TIOCNOTTY */
1814 #if !defined (DONT_REOPEN_PTY)
1815 /*** There is a suggestion that this ought to be a
1816 conditional on TIOCSPGRP,
1817 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1818 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1819 that system does seem to need this code, even though
1820 both HAVE_SETSID and TIOCSCTTY are defined. */
1821 /* Now close the pty (if we had it open) and reopen it.
1822 This makes the pty the controlling terminal of the subprocess. */
1826 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1829 emacs_close (xforkin
);
1830 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1834 emacs_write (1, "Couldn't open the pty terminal ", 31);
1835 emacs_write (1, pty_name
, strlen (pty_name
));
1836 emacs_write (1, "\n", 1);
1841 #endif /* not DONT_REOPEN_PTY */
1843 #ifdef SETUP_SLAVE_PTY
1848 #endif /* SETUP_SLAVE_PTY */
1850 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1851 Now reenable it in the child, so it will die when we want it to. */
1853 signal (SIGHUP
, SIG_DFL
);
1855 #endif /* HAVE_PTYS */
1857 signal (SIGINT
, SIG_DFL
);
1858 signal (SIGQUIT
, SIG_DFL
);
1860 /* Emacs ignores SIGPIPE, but the child should not. */
1861 signal (SIGPIPE
, SIG_DFL
);
1864 /* Stop blocking signals in the child. */
1865 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1869 child_setup_tty (xforkout
);
1871 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1872 new_argv
, 1, encoded_current_dir
);
1873 #else /* not WINDOWSNT */
1875 emacs_close (wait_child_setup
[0]);
1877 child_setup (xforkin
, xforkout
, xforkout
,
1878 new_argv
, 1, encoded_current_dir
);
1879 #endif /* not WINDOWSNT */
1882 /* Back in the parent process. */
1884 #if HAVE_WORKING_VFORK
1885 environ
= save_environ
;
1888 XPROCESS (process
)->pid
= pid
;
1890 /* Stop blocking signals in the parent. */
1892 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1899 emacs_close (forkin
);
1900 if (forkin
!= forkout
&& forkout
>= 0)
1901 emacs_close (forkout
);
1905 /* vfork succeeded. */
1908 register_child (pid
, inchannel
);
1909 #endif /* WINDOWSNT */
1911 /* If the subfork execv fails, and it exits,
1912 this close hangs. I don't know why.
1913 So have an interrupt jar it loose. */
1915 struct atimer
*timer
;
1916 EMACS_TIME offset
= make_emacs_time (1, 0);
1919 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1922 emacs_close (forkin
);
1924 cancel_atimer (timer
);
1928 if (forkin
!= forkout
&& forkout
>= 0)
1929 emacs_close (forkout
);
1931 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1933 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1934 /* Wait for child_setup to complete in case that vfork is
1935 actually defined as fork. The descriptor wait_child_setup[1]
1936 of a pipe is closed at the child side either by close-on-exec
1937 on successful execvp or the _exit call in child_setup. */
1941 emacs_close (wait_child_setup
[1]);
1942 emacs_read (wait_child_setup
[0], &dummy
, 1);
1943 emacs_close (wait_child_setup
[0]);
1948 /* Now generate the error if vfork failed. */
1950 report_file_error ("Doing vfork", Qnil
);
1954 create_pty (Lisp_Object process
)
1956 int inchannel
, outchannel
;
1959 inchannel
= outchannel
= -1;
1962 if (!NILP (Vprocess_connection_type
))
1963 outchannel
= inchannel
= allocate_pty ();
1967 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1968 /* On most USG systems it does not work to open the pty's tty here,
1969 then close it and reopen it in the child. */
1971 /* Don't let this terminal become our controlling terminal
1972 (in case we don't have one). */
1973 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1975 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1978 report_file_error ("Opening pty", Qnil
);
1979 #if defined (DONT_REOPEN_PTY)
1980 /* In the case that vfork is defined as fork, the parent process
1981 (Emacs) may send some data before the child process completes
1982 tty options setup. So we setup tty before forking. */
1983 child_setup_tty (forkout
);
1984 #endif /* DONT_REOPEN_PTY */
1985 #endif /* not USG, or USG_SUBTTY_WORKS */
1988 #endif /* HAVE_PTYS */
1991 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1992 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1995 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1996 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2000 /* Record this as an active process, with its channels.
2001 As a result, child_setup will close Emacs's side of the pipes. */
2002 chan_process
[inchannel
] = process
;
2003 XPROCESS (process
)->infd
= inchannel
;
2004 XPROCESS (process
)->outfd
= outchannel
;
2006 /* Previously we recorded the tty descriptor used in the subprocess.
2007 It was only used for getting the foreground tty process, so now
2008 we just reopen the device (see emacs_get_tty_pgrp) as this is
2009 more portable (see USG_SUBTTY_WORKS above). */
2011 XPROCESS (process
)->pty_flag
= pty_flag
;
2012 pset_status (XPROCESS (process
), Qrun
);
2013 setup_process_coding_systems (process
);
2015 FD_SET (inchannel
, &input_wait_mask
);
2016 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2017 if (inchannel
> max_process_desc
)
2018 max_process_desc
= inchannel
;
2020 XPROCESS (process
)->pid
= -2;
2023 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2026 pset_tty_name (XPROCESS (process
), Qnil
);
2030 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2031 The address family of sa is not included in the result. */
2034 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2036 Lisp_Object address
;
2039 register struct Lisp_Vector
*p
;
2041 /* Workaround for a bug in getsockname on BSD: Names bound to
2042 sockets in the UNIX domain are inaccessible; getsockname returns
2043 a zero length name. */
2044 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2045 return empty_unibyte_string
;
2047 switch (sa
->sa_family
)
2051 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2052 len
= sizeof (sin
->sin_addr
) + 1;
2053 address
= Fmake_vector (make_number (len
), Qnil
);
2054 p
= XVECTOR (address
);
2055 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2056 cp
= (unsigned char *) &sin
->sin_addr
;
2062 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2063 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2064 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2065 address
= Fmake_vector (make_number (len
), Qnil
);
2066 p
= XVECTOR (address
);
2067 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2068 for (i
= 0; i
< len
; i
++)
2069 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2073 #ifdef HAVE_LOCAL_SOCKETS
2076 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2077 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2078 if (sockun
->sun_path
[i
] == 0)
2080 return make_unibyte_string (sockun
->sun_path
, i
);
2084 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2085 address
= Fcons (make_number (sa
->sa_family
),
2086 Fmake_vector (make_number (len
), Qnil
));
2087 p
= XVECTOR (XCDR (address
));
2088 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2094 p
->contents
[i
++] = make_number (*cp
++);
2100 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2103 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2105 register struct Lisp_Vector
*p
;
2107 if (VECTORP (address
))
2109 p
= XVECTOR (address
);
2110 if (p
->header
.size
== 5)
2113 return sizeof (struct sockaddr_in
);
2116 else if (p
->header
.size
== 9)
2118 *familyp
= AF_INET6
;
2119 return sizeof (struct sockaddr_in6
);
2123 #ifdef HAVE_LOCAL_SOCKETS
2124 else if (STRINGP (address
))
2126 *familyp
= AF_LOCAL
;
2127 return sizeof (struct sockaddr_un
);
2130 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2131 && VECTORP (XCDR (address
)))
2133 struct sockaddr
*sa
;
2134 *familyp
= XINT (XCAR (address
));
2135 p
= XVECTOR (XCDR (address
));
2136 return p
->header
.size
+ sizeof (sa
->sa_family
);
2141 /* Convert an address object (vector or string) to an internal sockaddr.
2143 The address format has been basically validated by
2144 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2145 it could have come from user data. So if FAMILY is not valid,
2146 we return after zeroing *SA. */
2149 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2151 register struct Lisp_Vector
*p
;
2152 register unsigned char *cp
= NULL
;
2156 memset (sa
, 0, len
);
2158 if (VECTORP (address
))
2160 p
= XVECTOR (address
);
2161 if (family
== AF_INET
)
2163 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2164 len
= sizeof (sin
->sin_addr
) + 1;
2165 hostport
= XINT (p
->contents
[--len
]);
2166 sin
->sin_port
= htons (hostport
);
2167 cp
= (unsigned char *)&sin
->sin_addr
;
2168 sa
->sa_family
= family
;
2171 else if (family
== AF_INET6
)
2173 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2174 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2175 len
= sizeof (sin6
->sin6_addr
) + 1;
2176 hostport
= XINT (p
->contents
[--len
]);
2177 sin6
->sin6_port
= htons (hostport
);
2178 for (i
= 0; i
< len
; i
++)
2179 if (INTEGERP (p
->contents
[i
]))
2181 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2184 sa
->sa_family
= family
;
2191 else if (STRINGP (address
))
2193 #ifdef HAVE_LOCAL_SOCKETS
2194 if (family
== AF_LOCAL
)
2196 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2197 cp
= SDATA (address
);
2198 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2199 sockun
->sun_path
[i
] = *cp
++;
2200 sa
->sa_family
= family
;
2207 p
= XVECTOR (XCDR (address
));
2208 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2211 for (i
= 0; i
< len
; i
++)
2212 if (INTEGERP (p
->contents
[i
]))
2213 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2216 #ifdef DATAGRAM_SOCKETS
2217 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2219 doc
: /* Get the current datagram address associated with PROCESS. */)
2220 (Lisp_Object process
)
2224 CHECK_PROCESS (process
);
2226 if (!DATAGRAM_CONN_P (process
))
2229 channel
= XPROCESS (process
)->infd
;
2230 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2231 datagram_address
[channel
].len
);
2234 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2236 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2237 Returns nil upon error setting address, ADDRESS otherwise. */)
2238 (Lisp_Object process
, Lisp_Object address
)
2243 CHECK_PROCESS (process
);
2245 if (!DATAGRAM_CONN_P (process
))
2248 channel
= XPROCESS (process
)->infd
;
2250 len
= get_lisp_to_sockaddr_size (address
, &family
);
2251 if (datagram_address
[channel
].len
!= len
)
2253 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2259 static const struct socket_options
{
2260 /* The name of this option. Should be lowercase version of option
2261 name without SO_ prefix. */
2263 /* Option level SOL_... */
2265 /* Option number SO_... */
2267 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2268 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2269 } socket_options
[] =
2271 #ifdef SO_BINDTODEVICE
2272 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2275 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2278 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2281 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2284 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2287 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2290 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2293 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2295 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2298 /* Set option OPT to value VAL on socket S.
2300 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2301 Signals an error if setting a known option fails.
2305 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2308 const struct socket_options
*sopt
;
2313 name
= SSDATA (SYMBOL_NAME (opt
));
2314 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2315 if (strcmp (name
, sopt
->name
) == 0)
2318 switch (sopt
->opttype
)
2323 optval
= NILP (val
) ? 0 : 1;
2324 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2325 &optval
, sizeof (optval
));
2332 if (TYPE_RANGED_INTEGERP (int, val
))
2333 optval
= XINT (val
);
2335 error ("Bad option value for %s", name
);
2336 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2337 &optval
, sizeof (optval
));
2341 #ifdef SO_BINDTODEVICE
2344 char devname
[IFNAMSIZ
+1];
2346 /* This is broken, at least in the Linux 2.4 kernel.
2347 To unbind, the arg must be a zero integer, not the empty string.
2348 This should work on all systems. KFS. 2003-09-23. */
2349 memset (devname
, 0, sizeof devname
);
2352 char *arg
= SSDATA (val
);
2353 int len
= min (strlen (arg
), IFNAMSIZ
);
2354 memcpy (devname
, arg
, len
);
2356 else if (!NILP (val
))
2357 error ("Bad option value for %s", name
);
2358 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2367 struct linger linger
;
2370 linger
.l_linger
= 0;
2371 if (TYPE_RANGED_INTEGERP (int, val
))
2372 linger
.l_linger
= XINT (val
);
2374 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2375 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2376 &linger
, sizeof (linger
));
2386 report_file_error ("Cannot set network option",
2387 Fcons (opt
, Fcons (val
, Qnil
)));
2388 return (1 << sopt
->optbit
);
2392 DEFUN ("set-network-process-option",
2393 Fset_network_process_option
, Sset_network_process_option
,
2395 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2396 See `make-network-process' for a list of options and values.
2397 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2398 OPTION is not a supported option, return nil instead; otherwise return t. */)
2399 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2402 struct Lisp_Process
*p
;
2404 CHECK_PROCESS (process
);
2405 p
= XPROCESS (process
);
2406 if (!NETCONN1_P (p
))
2407 error ("Process is not a network process");
2411 error ("Process is not running");
2413 if (set_socket_option (s
, option
, value
))
2415 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2419 if (NILP (no_error
))
2420 error ("Unknown or unsupported option");
2426 DEFUN ("serial-process-configure",
2427 Fserial_process_configure
,
2428 Sserial_process_configure
,
2430 doc
: /* Configure speed, bytesize, etc. of a serial process.
2432 Arguments are specified as keyword/argument pairs. Attributes that
2433 are not given are re-initialized from the process's current
2434 configuration (available via the function `process-contact') or set to
2435 reasonable default values. The following arguments are defined:
2441 -- Any of these arguments can be given to identify the process that is
2442 to be configured. If none of these arguments is given, the current
2443 buffer's process is used.
2445 :speed SPEED -- SPEED is the speed of the serial port in bits per
2446 second, also called baud rate. Any value can be given for SPEED, but
2447 most serial ports work only at a few defined values between 1200 and
2448 115200, with 9600 being the most common value. If SPEED is nil, the
2449 serial port is not configured any further, i.e., all other arguments
2450 are ignored. This may be useful for special serial ports such as
2451 Bluetooth-to-serial converters which can only be configured through AT
2452 commands. A value of nil for SPEED can be used only when passed
2453 through `make-serial-process' or `serial-term'.
2455 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2456 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2458 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2459 `odd' (use odd parity), or the symbol `even' (use even parity). If
2460 PARITY is not given, no parity is used.
2462 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2463 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2464 is not given or nil, 1 stopbit is used.
2466 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2467 flowcontrol to be used, which is either nil (don't use flowcontrol),
2468 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2469 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2470 flowcontrol is used.
2472 `serial-process-configure' is called by `make-serial-process' for the
2473 initial configuration of the serial port.
2477 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2479 \(serial-process-configure
2480 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2482 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2484 usage: (serial-process-configure &rest ARGS) */)
2485 (ptrdiff_t nargs
, Lisp_Object
*args
)
2487 struct Lisp_Process
*p
;
2488 Lisp_Object contact
= Qnil
;
2489 Lisp_Object proc
= Qnil
;
2490 struct gcpro gcpro1
;
2492 contact
= Flist (nargs
, args
);
2495 proc
= Fplist_get (contact
, QCprocess
);
2497 proc
= Fplist_get (contact
, QCname
);
2499 proc
= Fplist_get (contact
, QCbuffer
);
2501 proc
= Fplist_get (contact
, QCport
);
2502 proc
= get_process (proc
);
2503 p
= XPROCESS (proc
);
2504 if (!EQ (p
->type
, Qserial
))
2505 error ("Not a serial process");
2507 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2513 serial_configure (p
, contact
);
2519 /* Used by make-serial-process to recover from errors. */
2521 make_serial_process_unwind (Lisp_Object proc
)
2523 if (!PROCESSP (proc
))
2525 remove_process (proc
);
2529 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2531 doc
: /* Create and return a serial port process.
2533 In Emacs, serial port connections are represented by process objects,
2534 so input and output work as for subprocesses, and `delete-process'
2535 closes a serial port connection. However, a serial process has no
2536 process id, it cannot be signaled, and the status codes are different
2537 from normal processes.
2539 `make-serial-process' creates a process and a buffer, on which you
2540 probably want to use `process-send-string'. Try \\[serial-term] for
2541 an interactive terminal. See below for examples.
2543 Arguments are specified as keyword/argument pairs. The following
2544 arguments are defined:
2546 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2547 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2548 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2549 the backslashes in strings).
2551 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2552 which this function calls.
2554 :name NAME -- NAME is the name of the process. If NAME is not given,
2555 the value of PORT is used.
2557 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2558 with the process. Process output goes at the end of that buffer,
2559 unless you specify an output stream or filter function to handle the
2560 output. If BUFFER is not given, the value of NAME is used.
2562 :coding CODING -- If CODING is a symbol, it specifies the coding
2563 system used for both reading and writing for this process. If CODING
2564 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2565 ENCODING is used for writing.
2567 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2568 the process is running. If BOOL is not given, query before exiting.
2570 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2571 In the stopped state, a serial process does not accept incoming data,
2572 but you can send outgoing data. The stopped state is cleared by
2573 `continue-process' and set by `stop-process'.
2575 :filter FILTER -- Install FILTER as the process filter.
2577 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2579 :plist PLIST -- Install PLIST as the initial plist of the process.
2585 -- This function calls `serial-process-configure' to handle these
2588 The original argument list, possibly modified by later configuration,
2589 is available via the function `process-contact'.
2593 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2595 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2597 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2599 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2601 usage: (make-serial-process &rest ARGS) */)
2602 (ptrdiff_t nargs
, Lisp_Object
*args
)
2605 Lisp_Object proc
, contact
, port
;
2606 struct Lisp_Process
*p
;
2607 struct gcpro gcpro1
;
2608 Lisp_Object name
, buffer
;
2609 Lisp_Object tem
, val
;
2610 ptrdiff_t specpdl_count
= -1;
2615 contact
= Flist (nargs
, args
);
2618 port
= Fplist_get (contact
, QCport
);
2620 error ("No port specified");
2621 CHECK_STRING (port
);
2623 if (NILP (Fplist_member (contact
, QCspeed
)))
2624 error (":speed not specified");
2625 if (!NILP (Fplist_get (contact
, QCspeed
)))
2626 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2628 name
= Fplist_get (contact
, QCname
);
2631 CHECK_STRING (name
);
2632 proc
= make_process (name
);
2633 specpdl_count
= SPECPDL_INDEX ();
2634 record_unwind_protect (make_serial_process_unwind
, proc
);
2635 p
= XPROCESS (proc
);
2637 fd
= serial_open (SSDATA (port
));
2640 if (fd
> max_process_desc
)
2641 max_process_desc
= fd
;
2642 chan_process
[fd
] = proc
;
2644 buffer
= Fplist_get (contact
, QCbuffer
);
2647 buffer
= Fget_buffer_create (buffer
);
2648 pset_buffer (p
, buffer
);
2650 pset_childp (p
, contact
);
2651 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2652 pset_type (p
, Qserial
);
2653 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2654 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2656 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2657 p
->kill_without_query
= 1;
2658 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2659 pset_command (p
, Qt
);
2662 if (!EQ (p
->command
, Qt
))
2664 FD_SET (fd
, &input_wait_mask
);
2665 FD_SET (fd
, &non_keyboard_wait_mask
);
2668 if (BUFFERP (buffer
))
2670 set_marker_both (p
->mark
, buffer
,
2671 BUF_ZV (XBUFFER (buffer
)),
2672 BUF_ZV_BYTE (XBUFFER (buffer
)));
2675 tem
= Fplist_member (contact
, QCcoding
);
2676 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2682 val
= XCAR (XCDR (tem
));
2686 else if (!NILP (Vcoding_system_for_read
))
2687 val
= Vcoding_system_for_read
;
2688 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2689 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2691 pset_decode_coding_system (p
, val
);
2696 val
= XCAR (XCDR (tem
));
2700 else if (!NILP (Vcoding_system_for_write
))
2701 val
= Vcoding_system_for_write
;
2702 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2703 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2705 pset_encode_coding_system (p
, val
);
2707 setup_process_coding_systems (proc
);
2708 pset_decoding_buf (p
, empty_unibyte_string
);
2709 p
->decoding_carryover
= 0;
2710 pset_encoding_buf (p
, empty_unibyte_string
);
2711 p
->inherit_coding_system_flag
2712 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2714 Fserial_process_configure (nargs
, args
);
2716 specpdl_ptr
= specpdl
+ specpdl_count
;
2722 /* Create a network stream/datagram client/server process. Treated
2723 exactly like a normal process when reading and writing. Primary
2724 differences are in status display and process deletion. A network
2725 connection has no PID; you cannot signal it. All you can do is
2726 stop/continue it and deactivate/close it via delete-process */
2728 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2730 doc
: /* Create and return a network server or client process.
2732 In Emacs, network connections are represented by process objects, so
2733 input and output work as for subprocesses and `delete-process' closes
2734 a network connection. However, a network process has no process id,
2735 it cannot be signaled, and the status codes are different from normal
2738 Arguments are specified as keyword/argument pairs. The following
2739 arguments are defined:
2741 :name NAME -- NAME is name for process. It is modified if necessary
2744 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2745 with the process. Process output goes at end of that buffer, unless
2746 you specify an output stream or filter function to handle the output.
2747 BUFFER may be also nil, meaning that this process is not associated
2750 :host HOST -- HOST is name of the host to connect to, or its IP
2751 address. The symbol `local' specifies the local host. If specified
2752 for a server process, it must be a valid name or address for the local
2753 host, and only clients connecting to that address will be accepted.
2755 :service SERVICE -- SERVICE is name of the service desired, or an
2756 integer specifying a port number to connect to. If SERVICE is t,
2757 a random port number is selected for the server. (If Emacs was
2758 compiled with getaddrinfo, a port number can also be specified as a
2759 string, e.g. "80", as well as an integer. This is not portable.)
2761 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2762 stream type connection, `datagram' creates a datagram type connection,
2763 `seqpacket' creates a reliable datagram connection.
2765 :family FAMILY -- FAMILY is the address (and protocol) family for the
2766 service specified by HOST and SERVICE. The default (nil) is to use
2767 whatever address family (IPv4 or IPv6) that is defined for the host
2768 and port number specified by HOST and SERVICE. Other address families
2770 local -- for a local (i.e. UNIX) address specified by SERVICE.
2771 ipv4 -- use IPv4 address family only.
2772 ipv6 -- use IPv6 address family only.
2774 :local ADDRESS -- ADDRESS is the local address used for the connection.
2775 This parameter is ignored when opening a client process. When specified
2776 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2778 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2779 connection. This parameter is ignored when opening a stream server
2780 process. For a datagram server process, it specifies the initial
2781 setting of the remote datagram address. When specified for a client
2782 process, the FAMILY, HOST, and SERVICE args are ignored.
2784 The format of ADDRESS depends on the address family:
2785 - An IPv4 address is represented as an vector of integers [A B C D P]
2786 corresponding to numeric IP address A.B.C.D and port number P.
2787 - A local address is represented as a string with the address in the
2788 local address space.
2789 - An "unsupported family" address is represented by a cons (F . AV)
2790 where F is the family number and AV is a vector containing the socket
2791 address data with one element per address data byte. Do not rely on
2792 this format in portable code, as it may depend on implementation
2793 defined constants, data sizes, and data structure alignment.
2795 :coding CODING -- If CODING is a symbol, it specifies the coding
2796 system used for both reading and writing for this process. If CODING
2797 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2798 ENCODING is used for writing.
2800 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2801 return without waiting for the connection to complete; instead, the
2802 sentinel function will be called with second arg matching "open" (if
2803 successful) or "failed" when the connect completes. Default is to use
2804 a blocking connect (i.e. wait) for stream type connections.
2806 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2807 running when Emacs is exited.
2809 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2810 In the stopped state, a server process does not accept new
2811 connections, and a client process does not handle incoming traffic.
2812 The stopped state is cleared by `continue-process' and set by
2815 :filter FILTER -- Install FILTER as the process filter.
2817 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2818 process filter are multibyte, otherwise they are unibyte.
2819 If this keyword is not specified, the strings are multibyte if
2820 the default value of `enable-multibyte-characters' is non-nil.
2822 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2824 :log LOG -- Install LOG as the server process log function. This
2825 function is called when the server accepts a network connection from a
2826 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2827 is the server process, CLIENT is the new process for the connection,
2828 and MESSAGE is a string.
2830 :plist PLIST -- Install PLIST as the new process' initial plist.
2832 :server QLEN -- if QLEN is non-nil, create a server process for the
2833 specified FAMILY, SERVICE, and connection type (stream or datagram).
2834 If QLEN is an integer, it is used as the max. length of the server's
2835 pending connection queue (also known as the backlog); the default
2836 queue length is 5. Default is to create a client process.
2838 The following network options can be specified for this connection:
2840 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2841 :dontroute BOOL -- Only send to directly connected hosts.
2842 :keepalive BOOL -- Send keep-alive messages on network stream.
2843 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2844 :oobinline BOOL -- Place out-of-band data in receive data stream.
2845 :priority INT -- Set protocol defined priority for sent packets.
2846 :reuseaddr BOOL -- Allow reusing a recently used local address
2847 (this is allowed by default for a server process).
2848 :bindtodevice NAME -- bind to interface NAME. Using this may require
2849 special privileges on some systems.
2851 Consult the relevant system programmer's manual pages for more
2852 information on using these options.
2855 A server process will listen for and accept connections from clients.
2856 When a client connection is accepted, a new network process is created
2857 for the connection with the following parameters:
2859 - The client's process name is constructed by concatenating the server
2860 process' NAME and a client identification string.
2861 - If the FILTER argument is non-nil, the client process will not get a
2862 separate process buffer; otherwise, the client's process buffer is a newly
2863 created buffer named after the server process' BUFFER name or process
2864 NAME concatenated with the client identification string.
2865 - The connection type and the process filter and sentinel parameters are
2866 inherited from the server process' TYPE, FILTER and SENTINEL.
2867 - The client process' contact info is set according to the client's
2868 addressing information (typically an IP address and a port number).
2869 - The client process' plist is initialized from the server's plist.
2871 Notice that the FILTER and SENTINEL args are never used directly by
2872 the server process. Also, the BUFFER argument is not used directly by
2873 the server process, but via the optional :log function, accepted (and
2874 failed) connections may be logged in the server process' buffer.
2876 The original argument list, modified with the actual connection
2877 information, is available via the `process-contact' function.
2879 usage: (make-network-process &rest ARGS) */)
2880 (ptrdiff_t nargs
, Lisp_Object
*args
)
2883 Lisp_Object contact
;
2884 struct Lisp_Process
*p
;
2885 #ifdef HAVE_GETADDRINFO
2886 struct addrinfo ai
, *res
, *lres
;
2887 struct addrinfo hints
;
2888 const char *portstring
;
2890 #else /* HAVE_GETADDRINFO */
2891 struct _emacs_addrinfo
2897 struct sockaddr
*ai_addr
;
2898 struct _emacs_addrinfo
*ai_next
;
2900 #endif /* HAVE_GETADDRINFO */
2901 struct sockaddr_in address_in
;
2902 #ifdef HAVE_LOCAL_SOCKETS
2903 struct sockaddr_un address_un
;
2908 int s
= -1, outch
, inch
;
2909 struct gcpro gcpro1
;
2910 ptrdiff_t count
= SPECPDL_INDEX ();
2912 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2914 Lisp_Object name
, buffer
, host
, service
, address
;
2915 Lisp_Object filter
, sentinel
;
2916 int is_non_blocking_client
= 0;
2917 int is_server
= 0, backlog
= 5;
2924 /* Save arguments for process-contact and clone-process. */
2925 contact
= Flist (nargs
, args
);
2929 /* Ensure socket support is loaded if available. */
2930 init_winsock (TRUE
);
2933 /* :type TYPE (nil: stream, datagram */
2934 tem
= Fplist_get (contact
, QCtype
);
2936 socktype
= SOCK_STREAM
;
2937 #ifdef DATAGRAM_SOCKETS
2938 else if (EQ (tem
, Qdatagram
))
2939 socktype
= SOCK_DGRAM
;
2941 #ifdef HAVE_SEQPACKET
2942 else if (EQ (tem
, Qseqpacket
))
2943 socktype
= SOCK_SEQPACKET
;
2946 error ("Unsupported connection type");
2949 tem
= Fplist_get (contact
, QCserver
);
2952 /* Don't support network sockets when non-blocking mode is
2953 not available, since a blocked Emacs is not useful. */
2954 #if !O_NONBLOCK && !O_NDELAY
2955 error ("Network servers not supported");
2958 if (TYPE_RANGED_INTEGERP (int, tem
))
2959 backlog
= XINT (tem
);
2963 /* Make QCaddress an alias for :local (server) or :remote (client). */
2964 QCaddress
= is_server
? QClocal
: QCremote
;
2967 if (!is_server
&& socktype
!= SOCK_DGRAM
2968 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2970 #ifndef NON_BLOCKING_CONNECT
2971 error ("Non-blocking connect not supported");
2973 is_non_blocking_client
= 1;
2977 name
= Fplist_get (contact
, QCname
);
2978 buffer
= Fplist_get (contact
, QCbuffer
);
2979 filter
= Fplist_get (contact
, QCfilter
);
2980 sentinel
= Fplist_get (contact
, QCsentinel
);
2982 CHECK_STRING (name
);
2984 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2985 ai
.ai_socktype
= socktype
;
2990 /* :local ADDRESS or :remote ADDRESS */
2991 address
= Fplist_get (contact
, QCaddress
);
2992 if (!NILP (address
))
2994 host
= service
= Qnil
;
2996 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2997 error ("Malformed :address");
2998 ai
.ai_family
= family
;
2999 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3000 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3004 /* :family FAMILY -- nil (for Inet), local, or integer. */
3005 tem
= Fplist_get (contact
, QCfamily
);
3008 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3014 #ifdef HAVE_LOCAL_SOCKETS
3015 else if (EQ (tem
, Qlocal
))
3019 else if (EQ (tem
, Qipv6
))
3022 else if (EQ (tem
, Qipv4
))
3024 else if (TYPE_RANGED_INTEGERP (int, tem
))
3025 family
= XINT (tem
);
3027 error ("Unknown address family");
3029 ai
.ai_family
= family
;
3031 /* :service SERVICE -- string, integer (port number), or t (random port). */
3032 service
= Fplist_get (contact
, QCservice
);
3034 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3035 host
= Fplist_get (contact
, QChost
);
3038 if (EQ (host
, Qlocal
))
3039 /* Depending on setup, "localhost" may map to different IPv4 and/or
3040 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3041 host
= build_string ("127.0.0.1");
3042 CHECK_STRING (host
);
3045 #ifdef HAVE_LOCAL_SOCKETS
3046 if (family
== AF_LOCAL
)
3050 message (":family local ignores the :host \"%s\" property",
3052 contact
= Fplist_put (contact
, QChost
, Qnil
);
3055 CHECK_STRING (service
);
3056 memset (&address_un
, 0, sizeof address_un
);
3057 address_un
.sun_family
= AF_LOCAL
;
3058 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3059 error ("Service name too long");
3060 strcpy (address_un
.sun_path
, SSDATA (service
));
3061 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3062 ai
.ai_addrlen
= sizeof address_un
;
3067 /* Slow down polling to every ten seconds.
3068 Some kernels have a bug which causes retrying connect to fail
3069 after a connect. Polling can interfere with gethostbyname too. */
3070 #ifdef POLL_FOR_INPUT
3071 if (socktype
!= SOCK_DGRAM
)
3073 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3074 bind_polling_period (10);
3078 #ifdef HAVE_GETADDRINFO
3079 /* If we have a host, use getaddrinfo to resolve both host and service.
3080 Otherwise, use getservbyname to lookup the service. */
3084 /* SERVICE can either be a string or int.
3085 Convert to a C string for later use by getaddrinfo. */
3086 if (EQ (service
, Qt
))
3088 else if (INTEGERP (service
))
3090 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3091 portstring
= portbuf
;
3095 CHECK_STRING (service
);
3096 portstring
= SSDATA (service
);
3101 memset (&hints
, 0, sizeof (hints
));
3103 hints
.ai_family
= family
;
3104 hints
.ai_socktype
= socktype
;
3105 hints
.ai_protocol
= 0;
3107 #ifdef HAVE_RES_INIT
3111 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3113 #ifdef HAVE_GAI_STRERROR
3114 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3116 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3122 #endif /* HAVE_GETADDRINFO */
3124 /* We end up here if getaddrinfo is not defined, or in case no hostname
3125 has been specified (e.g. for a local server process). */
3127 if (EQ (service
, Qt
))
3129 else if (INTEGERP (service
))
3130 port
= htons ((unsigned short) XINT (service
));
3133 struct servent
*svc_info
;
3134 CHECK_STRING (service
);
3135 svc_info
= getservbyname (SSDATA (service
),
3136 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3138 error ("Unknown service: %s", SDATA (service
));
3139 port
= svc_info
->s_port
;
3142 memset (&address_in
, 0, sizeof address_in
);
3143 address_in
.sin_family
= family
;
3144 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3145 address_in
.sin_port
= port
;
3147 #ifndef HAVE_GETADDRINFO
3150 struct hostent
*host_info_ptr
;
3152 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3153 as it may `hang' Emacs for a very long time. */
3157 #ifdef HAVE_RES_INIT
3161 host_info_ptr
= gethostbyname (SDATA (host
));
3166 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3167 host_info_ptr
->h_length
);
3168 family
= host_info_ptr
->h_addrtype
;
3169 address_in
.sin_family
= family
;
3172 /* Attempt to interpret host as numeric inet address */
3174 unsigned long numeric_addr
;
3175 numeric_addr
= inet_addr (SSDATA (host
));
3176 if (numeric_addr
== -1)
3177 error ("Unknown host \"%s\"", SDATA (host
));
3179 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3180 sizeof (address_in
.sin_addr
));
3184 #endif /* not HAVE_GETADDRINFO */
3186 ai
.ai_family
= family
;
3187 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3188 ai
.ai_addrlen
= sizeof address_in
;
3192 /* Do this in case we never enter the for-loop below. */
3193 count1
= SPECPDL_INDEX ();
3196 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3205 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3212 #ifdef DATAGRAM_SOCKETS
3213 if (!is_server
&& socktype
== SOCK_DGRAM
)
3215 #endif /* DATAGRAM_SOCKETS */
3217 #ifdef NON_BLOCKING_CONNECT
3218 if (is_non_blocking_client
)
3221 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3223 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3235 /* Make us close S if quit. */
3236 record_unwind_protect (close_file_unwind
, make_number (s
));
3238 /* Parse network options in the arg list.
3239 We simply ignore anything which isn't a known option (including other keywords).
3240 An error is signaled if setting a known option fails. */
3241 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3242 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3246 /* Configure as a server socket. */
3248 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3249 explicit :reuseaddr key to override this. */
3250 #ifdef HAVE_LOCAL_SOCKETS
3251 if (family
!= AF_LOCAL
)
3253 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3256 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3257 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3260 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3261 report_file_error ("Cannot bind server socket", Qnil
);
3263 #ifdef HAVE_GETSOCKNAME
3264 if (EQ (service
, Qt
))
3266 struct sockaddr_in sa1
;
3267 socklen_t len1
= sizeof (sa1
);
3268 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3270 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3271 service
= make_number (ntohs (sa1
.sin_port
));
3272 contact
= Fplist_put (contact
, QCservice
, service
);
3277 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3278 report_file_error ("Cannot listen on server socket", Qnil
);
3286 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3289 if (ret
== 0 || xerrno
== EISCONN
)
3291 /* The unwind-protect will be discarded afterwards.
3292 Likewise for immediate_quit. */
3296 #ifdef NON_BLOCKING_CONNECT
3298 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3302 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3309 if (xerrno
== EINTR
)
3311 /* Unlike most other syscalls connect() cannot be called
3312 again. (That would return EALREADY.) The proper way to
3313 wait for completion is pselect(). */
3321 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3327 report_file_error ("select failed", Qnil
);
3331 len
= sizeof xerrno
;
3332 eassert (FD_ISSET (s
, &fdset
));
3333 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3334 report_file_error ("getsockopt failed", Qnil
);
3336 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3340 #endif /* !WINDOWSNT */
3344 /* Discard the unwind protect closing S. */
3345 specpdl_ptr
= specpdl
+ count1
;
3350 if (xerrno
== EINTR
)
3357 #ifdef DATAGRAM_SOCKETS
3358 if (socktype
== SOCK_DGRAM
)
3360 if (datagram_address
[s
].sa
)
3362 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3363 datagram_address
[s
].len
= lres
->ai_addrlen
;
3367 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3368 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3371 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3372 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3373 conv_lisp_to_sockaddr (rfamily
, remote
,
3374 datagram_address
[s
].sa
, rlen
);
3378 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3381 contact
= Fplist_put (contact
, QCaddress
,
3382 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3383 #ifdef HAVE_GETSOCKNAME
3386 struct sockaddr_in sa1
;
3387 socklen_t len1
= sizeof (sa1
);
3388 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3389 contact
= Fplist_put (contact
, QClocal
,
3390 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3397 #ifdef HAVE_GETADDRINFO
3406 /* Discard the unwind protect for closing S, if any. */
3407 specpdl_ptr
= specpdl
+ count1
;
3409 /* Unwind bind_polling_period and request_sigio. */
3410 unbind_to (count
, Qnil
);
3414 /* If non-blocking got this far - and failed - assume non-blocking is
3415 not supported after all. This is probably a wrong assumption, but
3416 the normal blocking calls to open-network-stream handles this error
3418 if (is_non_blocking_client
)
3423 report_file_error ("make server process failed", contact
);
3425 report_file_error ("make client process failed", contact
);
3432 buffer
= Fget_buffer_create (buffer
);
3433 proc
= make_process (name
);
3435 chan_process
[inch
] = proc
;
3438 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3441 fcntl (inch
, F_SETFL
, O_NDELAY
);
3445 p
= XPROCESS (proc
);
3447 pset_childp (p
, contact
);
3448 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3449 pset_type (p
, Qnetwork
);
3451 pset_buffer (p
, buffer
);
3452 pset_sentinel (p
, sentinel
);
3453 pset_filter (p
, filter
);
3454 pset_log (p
, Fplist_get (contact
, QClog
));
3455 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3456 p
->kill_without_query
= 1;
3457 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3458 pset_command (p
, Qt
);
3462 if (is_server
&& socktype
!= SOCK_DGRAM
)
3463 pset_status (p
, Qlisten
);
3465 /* Make the process marker point into the process buffer (if any). */
3466 if (BUFFERP (buffer
))
3467 set_marker_both (p
->mark
, buffer
,
3468 BUF_ZV (XBUFFER (buffer
)),
3469 BUF_ZV_BYTE (XBUFFER (buffer
)));
3471 #ifdef NON_BLOCKING_CONNECT
3472 if (is_non_blocking_client
)
3474 /* We may get here if connect did succeed immediately. However,
3475 in that case, we still need to signal this like a non-blocking
3477 pset_status (p
, Qconnect
);
3478 if (!FD_ISSET (inch
, &connect_wait_mask
))
3480 FD_SET (inch
, &connect_wait_mask
);
3481 FD_SET (inch
, &write_mask
);
3482 num_pending_connects
++;
3487 /* A server may have a client filter setting of Qt, but it must
3488 still listen for incoming connects unless it is stopped. */
3489 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3490 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3492 FD_SET (inch
, &input_wait_mask
);
3493 FD_SET (inch
, &non_keyboard_wait_mask
);
3496 if (inch
> max_process_desc
)
3497 max_process_desc
= inch
;
3499 tem
= Fplist_member (contact
, QCcoding
);
3500 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3501 tem
= Qnil
; /* No error message (too late!). */
3504 /* Setup coding systems for communicating with the network stream. */
3505 struct gcpro gcpro1
;
3506 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3507 Lisp_Object coding_systems
= Qt
;
3508 Lisp_Object fargs
[5], val
;
3512 val
= XCAR (XCDR (tem
));
3516 else if (!NILP (Vcoding_system_for_read
))
3517 val
= Vcoding_system_for_read
;
3518 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3519 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3520 /* We dare not decode end-of-line format by setting VAL to
3521 Qraw_text, because the existing Emacs Lisp libraries
3522 assume that they receive bare code including a sequence of
3527 if (NILP (host
) || NILP (service
))
3528 coding_systems
= Qnil
;
3531 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3532 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3534 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3537 if (CONSP (coding_systems
))
3538 val
= XCAR (coding_systems
);
3539 else if (CONSP (Vdefault_process_coding_system
))
3540 val
= XCAR (Vdefault_process_coding_system
);
3544 pset_decode_coding_system (p
, val
);
3548 val
= XCAR (XCDR (tem
));
3552 else if (!NILP (Vcoding_system_for_write
))
3553 val
= Vcoding_system_for_write
;
3554 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3558 if (EQ (coding_systems
, Qt
))
3560 if (NILP (host
) || NILP (service
))
3561 coding_systems
= Qnil
;
3564 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3565 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3567 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3571 if (CONSP (coding_systems
))
3572 val
= XCDR (coding_systems
);
3573 else if (CONSP (Vdefault_process_coding_system
))
3574 val
= XCDR (Vdefault_process_coding_system
);
3578 pset_encode_coding_system (p
, val
);
3580 setup_process_coding_systems (proc
);
3582 pset_decoding_buf (p
, empty_unibyte_string
);
3583 p
->decoding_carryover
= 0;
3584 pset_encoding_buf (p
, empty_unibyte_string
);
3586 p
->inherit_coding_system_flag
3587 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3594 #if defined (HAVE_NET_IF_H)
3597 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3598 doc
: /* Return an alist of all network interfaces and their network address.
3599 Each element is a cons, the car of which is a string containing the
3600 interface name, and the cdr is the network address in internal
3601 format; see the description of ADDRESS in `make-network-process'. */)
3604 struct ifconf ifconf
;
3605 struct ifreq
*ifreq
;
3607 ptrdiff_t buf_size
= 512;
3611 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3617 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3618 ifconf
.ifc_buf
= buf
;
3619 ifconf
.ifc_len
= buf_size
;
3620 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3627 while (ifconf
.ifc_len
== buf_size
);
3632 ifreq
= ifconf
.ifc_req
;
3633 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3635 struct ifreq
*ifq
= ifreq
;
3636 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3637 #define SIZEOF_IFREQ(sif) \
3638 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3639 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3641 int len
= SIZEOF_IFREQ (ifq
);
3643 int len
= sizeof (*ifreq
);
3645 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3647 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3649 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3652 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3653 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3654 res
= Fcons (Fcons (build_string (namebuf
),
3655 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3656 sizeof (struct sockaddr
))),
3663 #endif /* SIOCGIFCONF */
3665 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3669 const char *flag_sym
;
3672 static const struct ifflag_def ifflag_table
[] = {
3676 #ifdef IFF_BROADCAST
3677 { IFF_BROADCAST
, "broadcast" },
3680 { IFF_DEBUG
, "debug" },
3683 { IFF_LOOPBACK
, "loopback" },
3685 #ifdef IFF_POINTOPOINT
3686 { IFF_POINTOPOINT
, "pointopoint" },
3689 { IFF_RUNNING
, "running" },
3692 { IFF_NOARP
, "noarp" },
3695 { IFF_PROMISC
, "promisc" },
3697 #ifdef IFF_NOTRAILERS
3698 #ifdef NS_IMPL_COCOA
3699 /* Really means smart, notrailers is obsolete */
3700 { IFF_NOTRAILERS
, "smart" },
3702 { IFF_NOTRAILERS
, "notrailers" },
3706 { IFF_ALLMULTI
, "allmulti" },
3709 { IFF_MASTER
, "master" },
3712 { IFF_SLAVE
, "slave" },
3714 #ifdef IFF_MULTICAST
3715 { IFF_MULTICAST
, "multicast" },
3718 { IFF_PORTSEL
, "portsel" },
3720 #ifdef IFF_AUTOMEDIA
3721 { IFF_AUTOMEDIA
, "automedia" },
3724 { IFF_DYNAMIC
, "dynamic" },
3727 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3730 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3733 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3736 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3739 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3744 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3745 doc
: /* Return information about network interface named IFNAME.
3746 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3747 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3748 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3749 FLAGS is the current flags of the interface. */)
3750 (Lisp_Object ifname
)
3753 Lisp_Object res
= Qnil
;
3757 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3758 && defined HAVE_GETIFADDRS && defined LLADDR)
3759 struct ifaddrs
*ifap
;
3762 CHECK_STRING (ifname
);
3764 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3765 error ("interface name too long");
3766 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3768 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3773 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3774 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3776 int flags
= rq
.ifr_flags
;
3777 const struct ifflag_def
*fp
;
3780 /* If flags is smaller than int (i.e. short) it may have the high bit set
3781 due to IFF_MULTICAST. In that case, sign extending it into
3783 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3784 flags
= (unsigned short) rq
.ifr_flags
;
3787 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3789 if (flags
& fp
->flag_bit
)
3791 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3792 flags
-= fp
->flag_bit
;
3795 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3799 elt
= Fcons (make_number (fnum
), elt
);
3804 res
= Fcons (elt
, res
);
3807 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3808 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3810 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3811 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3815 for (n
= 0; n
< 6; n
++)
3816 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3817 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3819 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3820 if (getifaddrs (&ifap
) != -1)
3822 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3823 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3826 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3828 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3829 unsigned char linkaddr
[6];
3832 if (it
->ifa_addr
->sa_family
!= AF_LINK
3833 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3834 || sdl
->sdl_alen
!= 6)
3837 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3838 for (n
= 0; n
< 6; n
++)
3839 p
->contents
[n
] = make_number (linkaddr
[n
]);
3841 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3845 #ifdef HAVE_FREEIFADDRS
3849 #endif /* HAVE_GETIFADDRS && LLADDR */
3851 res
= Fcons (elt
, res
);
3854 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3855 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3858 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3859 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3861 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3865 res
= Fcons (elt
, res
);
3868 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3869 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3872 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3875 res
= Fcons (elt
, res
);
3878 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3879 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3882 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3885 res
= Fcons (elt
, res
);
3889 return any
? res
: Qnil
;
3892 #endif /* defined (HAVE_NET_IF_H) */
3894 /* Turn off input and output for process PROC. */
3897 deactivate_process (Lisp_Object proc
)
3899 register int inchannel
, outchannel
;
3900 register struct Lisp_Process
*p
= XPROCESS (proc
);
3903 /* Delete GnuTLS structures in PROC, if any. */
3904 emacs_gnutls_deinit (proc
);
3905 #endif /* HAVE_GNUTLS */
3907 inchannel
= p
->infd
;
3908 outchannel
= p
->outfd
;
3910 #ifdef ADAPTIVE_READ_BUFFERING
3911 if (p
->read_output_delay
> 0)
3913 if (--process_output_delay_count
< 0)
3914 process_output_delay_count
= 0;
3915 p
->read_output_delay
= 0;
3916 p
->read_output_skip
= 0;
3922 /* Beware SIGCHLD hereabouts. */
3923 flush_pending_output (inchannel
);
3924 emacs_close (inchannel
);
3925 if (outchannel
>= 0 && outchannel
!= inchannel
)
3926 emacs_close (outchannel
);
3930 #ifdef DATAGRAM_SOCKETS
3931 if (DATAGRAM_CHAN_P (inchannel
))
3933 xfree (datagram_address
[inchannel
].sa
);
3934 datagram_address
[inchannel
].sa
= 0;
3935 datagram_address
[inchannel
].len
= 0;
3938 chan_process
[inchannel
] = Qnil
;
3939 FD_CLR (inchannel
, &input_wait_mask
);
3940 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3941 #ifdef NON_BLOCKING_CONNECT
3942 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3944 FD_CLR (inchannel
, &connect_wait_mask
);
3945 FD_CLR (inchannel
, &write_mask
);
3946 if (--num_pending_connects
< 0)
3950 if (inchannel
== max_process_desc
)
3953 /* We just closed the highest-numbered process input descriptor,
3954 so recompute the highest-numbered one now. */
3955 max_process_desc
= 0;
3956 for (i
= 0; i
< MAXDESC
; i
++)
3957 if (!NILP (chan_process
[i
]))
3958 max_process_desc
= i
;
3964 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3966 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3967 It is read into the process' buffers or given to their filter functions.
3968 Non-nil arg PROCESS means do not return until some output has been received
3971 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3972 and milliseconds to wait; return after that much time whether or not
3973 there is any subprocess output. If SECONDS is a floating point number,
3974 it specifies a fractional number of seconds to wait.
3975 The MILLISEC argument is obsolete and should be avoided.
3977 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3978 from PROCESS, suspending reading output from other processes.
3979 If JUST-THIS-ONE is an integer, don't run any timers either.
3980 Return non-nil if we received any output before the timeout expired. */)
3981 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3986 if (! NILP (process
))
3987 CHECK_PROCESS (process
);
3989 just_this_one
= Qnil
;
3991 if (!NILP (millisec
))
3992 { /* Obsolete calling convention using integers rather than floats. */
3993 CHECK_NUMBER (millisec
);
3995 seconds
= make_float (XINT (millisec
) / 1000.0);
3998 CHECK_NUMBER (seconds
);
3999 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4006 if (!NILP (seconds
))
4008 if (INTEGERP (seconds
))
4010 if (0 < XINT (seconds
))
4012 secs
= XINT (seconds
);
4016 else if (FLOATP (seconds
))
4018 if (0 < XFLOAT_DATA (seconds
))
4020 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4021 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
4022 nsecs
= EMACS_NSECS (t
);
4026 wrong_type_argument (Qnumberp
, seconds
);
4028 else if (! NILP (process
))
4032 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4034 !NILP (process
) ? XPROCESS (process
) : NULL
,
4035 NILP (just_this_one
) ? 0 :
4036 !INTEGERP (just_this_one
) ? 1 : -1)
4040 /* Accept a connection for server process SERVER on CHANNEL. */
4042 static int connect_counter
= 0;
4045 server_accept_connection (Lisp_Object server
, int channel
)
4047 Lisp_Object proc
, caller
, name
, buffer
;
4048 Lisp_Object contact
, host
, service
;
4049 struct Lisp_Process
*ps
= XPROCESS (server
);
4050 struct Lisp_Process
*p
;
4054 struct sockaddr_in in
;
4056 struct sockaddr_in6 in6
;
4058 #ifdef HAVE_LOCAL_SOCKETS
4059 struct sockaddr_un un
;
4062 socklen_t len
= sizeof saddr
;
4064 s
= accept (channel
, &saddr
.sa
, &len
);
4073 if (code
== EWOULDBLOCK
)
4077 if (!NILP (ps
->log
))
4078 call3 (ps
->log
, server
, Qnil
,
4079 concat3 (build_string ("accept failed with code"),
4080 Fnumber_to_string (make_number (code
)),
4081 build_string ("\n")));
4087 /* Setup a new process to handle the connection. */
4089 /* Generate a unique identification of the caller, and build contact
4090 information for this process. */
4093 switch (saddr
.sa
.sa_family
)
4097 Lisp_Object args
[5];
4098 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4099 args
[0] = build_string ("%d.%d.%d.%d");
4100 args
[1] = make_number (*ip
++);
4101 args
[2] = make_number (*ip
++);
4102 args
[3] = make_number (*ip
++);
4103 args
[4] = make_number (*ip
++);
4104 host
= Fformat (5, args
);
4105 service
= make_number (ntohs (saddr
.in
.sin_port
));
4107 args
[0] = build_string (" <%s:%d>");
4110 caller
= Fformat (3, args
);
4117 Lisp_Object args
[9];
4118 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4120 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4121 for (i
= 0; i
< 8; i
++)
4122 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4123 host
= Fformat (9, args
);
4124 service
= make_number (ntohs (saddr
.in
.sin_port
));
4126 args
[0] = build_string (" <[%s]:%d>");
4129 caller
= Fformat (3, args
);
4134 #ifdef HAVE_LOCAL_SOCKETS
4138 caller
= Fnumber_to_string (make_number (connect_counter
));
4139 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4143 /* Create a new buffer name for this process if it doesn't have a
4144 filter. The new buffer name is based on the buffer name or
4145 process name of the server process concatenated with the caller
4148 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4152 buffer
= ps
->buffer
;
4154 buffer
= Fbuffer_name (buffer
);
4159 buffer
= concat2 (buffer
, caller
);
4160 buffer
= Fget_buffer_create (buffer
);
4164 /* Generate a unique name for the new server process. Combine the
4165 server process name with the caller identification. */
4167 name
= concat2 (ps
->name
, caller
);
4168 proc
= make_process (name
);
4170 chan_process
[s
] = proc
;
4173 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4176 fcntl (s
, F_SETFL
, O_NDELAY
);
4180 p
= XPROCESS (proc
);
4182 /* Build new contact information for this setup. */
4183 contact
= Fcopy_sequence (ps
->childp
);
4184 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4185 contact
= Fplist_put (contact
, QChost
, host
);
4186 if (!NILP (service
))
4187 contact
= Fplist_put (contact
, QCservice
, service
);
4188 contact
= Fplist_put (contact
, QCremote
,
4189 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4190 #ifdef HAVE_GETSOCKNAME
4192 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4193 contact
= Fplist_put (contact
, QClocal
,
4194 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4197 pset_childp (p
, contact
);
4198 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4199 pset_type (p
, Qnetwork
);
4201 pset_buffer (p
, buffer
);
4202 pset_sentinel (p
, ps
->sentinel
);
4203 pset_filter (p
, ps
->filter
);
4204 pset_command (p
, Qnil
);
4208 pset_status (p
, Qrun
);
4210 /* Client processes for accepted connections are not stopped initially. */
4211 if (!EQ (p
->filter
, Qt
))
4213 FD_SET (s
, &input_wait_mask
);
4214 FD_SET (s
, &non_keyboard_wait_mask
);
4217 if (s
> max_process_desc
)
4218 max_process_desc
= s
;
4220 /* Setup coding system for new process based on server process.
4221 This seems to be the proper thing to do, as the coding system
4222 of the new process should reflect the settings at the time the
4223 server socket was opened; not the current settings. */
4225 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4226 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4227 setup_process_coding_systems (proc
);
4229 pset_decoding_buf (p
, empty_unibyte_string
);
4230 p
->decoding_carryover
= 0;
4231 pset_encoding_buf (p
, empty_unibyte_string
);
4233 p
->inherit_coding_system_flag
4234 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4236 if (!NILP (ps
->log
))
4237 call3 (ps
->log
, server
, proc
,
4238 concat3 (build_string ("accept from "),
4239 (STRINGP (host
) ? host
: build_string ("-")),
4240 build_string ("\n")));
4242 if (!NILP (p
->sentinel
))
4243 exec_sentinel (proc
,
4244 concat3 (build_string ("open from "),
4245 (STRINGP (host
) ? host
: build_string ("-")),
4246 build_string ("\n")));
4249 /* This variable is different from waiting_for_input in keyboard.c.
4250 It is used to communicate to a lisp process-filter/sentinel (via the
4251 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4252 for user-input when that process-filter was called.
4253 waiting_for_input cannot be used as that is by definition 0 when
4254 lisp code is being evalled.
4255 This is also used in record_asynch_buffer_change.
4256 For that purpose, this must be 0
4257 when not inside wait_reading_process_output. */
4258 static int waiting_for_user_input_p
;
4261 wait_reading_process_output_unwind (Lisp_Object data
)
4263 waiting_for_user_input_p
= XINT (data
);
4267 /* This is here so breakpoints can be put on it. */
4269 wait_reading_process_output_1 (void)
4273 /* Read and dispose of subprocess output while waiting for timeout to
4274 elapse and/or keyboard input to be available.
4278 If negative, gobble data immediately available but don't wait for any.
4281 an additional duration to wait, measured in nanoseconds
4282 If TIME_LIMIT is zero, then:
4283 If NSECS == 0, there is no limit.
4284 If NSECS > 0, the timeout consists of NSECS only.
4285 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4288 0 to ignore keyboard input, or
4289 1 to return when input is available, or
4290 -1 meaning caller will actually read the input, so don't throw to
4291 the quit handler, or
4293 DO_DISPLAY means redisplay should be done to show subprocess
4294 output that arrives.
4296 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4297 (and gobble terminal input into the buffer if any arrives).
4299 If WAIT_PROC is specified, wait until something arrives from that
4300 process. The return value is true if we read some input from
4303 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4304 (suspending output from other processes). A negative value
4305 means don't run any timers either.
4307 If WAIT_PROC is specified, then the function returns true if we
4308 received input from that process before the timeout elapsed.
4309 Otherwise, return true if we received input from any process. */
4312 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4314 Lisp_Object wait_for_cell
,
4315 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4317 register int channel
, nfds
;
4318 SELECT_TYPE Available
;
4319 SELECT_TYPE Writeok
;
4321 int check_delay
, no_avail
;
4324 EMACS_TIME timeout
, end_time
;
4325 int wait_channel
= -1;
4326 int got_some_input
= 0;
4327 ptrdiff_t count
= SPECPDL_INDEX ();
4329 FD_ZERO (&Available
);
4332 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4333 && !(CONSP (wait_proc
->status
)
4334 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4335 message ("Blocking call to accept-process-output with quit inhibited!!");
4337 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4338 if (wait_proc
!= NULL
)
4339 wait_channel
= wait_proc
->infd
;
4341 record_unwind_protect (wait_reading_process_output_unwind
,
4342 make_number (waiting_for_user_input_p
));
4343 waiting_for_user_input_p
= read_kbd
;
4350 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4351 time_limit
= TYPE_MAXIMUM (time_t);
4353 /* Since we may need to wait several times,
4354 compute the absolute time to return at. */
4355 if (time_limit
|| 0 < nsecs
)
4357 timeout
= make_emacs_time (time_limit
, nsecs
);
4358 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4363 int timeout_reduced_for_timers
= 0;
4365 /* If calling from keyboard input, do not quit
4366 since we want to return C-g as an input character.
4367 Otherwise, do pending quit if requested. */
4370 else if (pending_signals
)
4371 process_pending_signals ();
4373 /* Exit now if the cell we're waiting for became non-nil. */
4374 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4377 /* Compute time from now till when time limit is up */
4378 /* Exit if already run out */
4381 /* A negative timeout means
4382 gobble output available now
4383 but don't wait at all. */
4385 timeout
= make_emacs_time (0, 0);
4387 else if (time_limit
|| 0 < nsecs
)
4389 EMACS_TIME now
= current_emacs_time ();
4390 if (EMACS_TIME_LE (end_time
, now
))
4392 timeout
= sub_emacs_time (end_time
, now
);
4396 timeout
= make_emacs_time (100000, 0);
4399 /* Normally we run timers here.
4400 But not if wait_for_cell; in those cases,
4401 the wait is supposed to be short,
4402 and those callers cannot handle running arbitrary Lisp code here. */
4403 if (NILP (wait_for_cell
)
4404 && just_wait_proc
>= 0)
4406 EMACS_TIME timer_delay
;
4410 unsigned old_timers_run
= timers_run
;
4411 struct buffer
*old_buffer
= current_buffer
;
4412 Lisp_Object old_window
= selected_window
;
4414 timer_delay
= timer_check ();
4416 /* If a timer has run, this might have changed buffers
4417 an alike. Make read_key_sequence aware of that. */
4418 if (timers_run
!= old_timers_run
4419 && (old_buffer
!= current_buffer
4420 || !EQ (old_window
, selected_window
))
4421 && waiting_for_user_input_p
== -1)
4422 record_asynch_buffer_change ();
4424 if (timers_run
!= old_timers_run
&& do_display
)
4425 /* We must retry, since a timer may have requeued itself
4426 and that could alter the time_delay. */
4427 redisplay_preserve_echo_area (9);
4431 while (!detect_input_pending ());
4433 /* If there is unread keyboard input, also return. */
4435 && requeued_events_pending_p ())
4438 /* A negative timeout means do not wait at all. */
4441 if (EMACS_TIME_VALID_P (timer_delay
))
4443 if (EMACS_TIME_LT (timer_delay
, timeout
))
4445 timeout
= timer_delay
;
4446 timeout_reduced_for_timers
= 1;
4451 /* This is so a breakpoint can be put here. */
4452 wait_reading_process_output_1 ();
4457 /* Cause C-g and alarm signals to take immediate action,
4458 and cause input available signals to zero out timeout.
4460 It is important that we do this before checking for process
4461 activity. If we get a SIGCHLD after the explicit checks for
4462 process activity, timeout is the only way we will know. */
4464 set_waiting_for_input (&timeout
);
4466 /* If status of something has changed, and no input is
4467 available, notify the user of the change right away. After
4468 this explicit check, we'll let the SIGCHLD handler zap
4469 timeout to get our attention. */
4470 if (update_tick
!= process_tick
)
4475 if (kbd_on_hold_p ())
4478 Atemp
= input_wait_mask
;
4481 timeout
= make_emacs_time (0, 0);
4482 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4484 #ifdef NON_BLOCKING_CONNECT
4485 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4489 NULL
, &timeout
, NULL
)
4492 /* It's okay for us to do this and then continue with
4493 the loop, since timeout has already been zeroed out. */
4494 clear_waiting_for_input ();
4495 status_notify (NULL
);
4496 if (do_display
) redisplay_preserve_echo_area (13);
4500 /* Don't wait for output from a non-running process. Just
4501 read whatever data has already been received. */
4502 if (wait_proc
&& wait_proc
->raw_status_new
)
4503 update_status (wait_proc
);
4505 && ! EQ (wait_proc
->status
, Qrun
)
4506 && ! EQ (wait_proc
->status
, Qconnect
))
4508 int nread
, total_nread
= 0;
4510 clear_waiting_for_input ();
4511 XSETPROCESS (proc
, wait_proc
);
4513 /* Read data from the process, until we exhaust it. */
4514 while (wait_proc
->infd
>= 0)
4516 nread
= read_process_output (proc
, wait_proc
->infd
);
4523 total_nread
+= nread
;
4527 else if (nread
== -1 && EIO
== errno
)
4531 else if (nread
== -1 && EAGAIN
== errno
)
4535 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4539 if (total_nread
> 0 && do_display
)
4540 redisplay_preserve_echo_area (10);
4545 /* Wait till there is something to do */
4547 if (wait_proc
&& just_wait_proc
)
4549 if (wait_proc
->infd
< 0) /* Terminated */
4551 FD_SET (wait_proc
->infd
, &Available
);
4555 else if (!NILP (wait_for_cell
))
4557 Available
= non_process_wait_mask
;
4564 Available
= non_keyboard_wait_mask
;
4566 Available
= input_wait_mask
;
4567 Writeok
= write_mask
;
4568 #ifdef SELECT_CANT_DO_WRITE_MASK
4573 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4576 /* If frame size has changed or the window is newly mapped,
4577 redisplay now, before we start to wait. There is a race
4578 condition here; if a SIGIO arrives between now and the select
4579 and indicates that a frame is trashed, the select may block
4580 displaying a trashed screen. */
4581 if (frame_garbaged
&& do_display
)
4583 clear_waiting_for_input ();
4584 redisplay_preserve_echo_area (11);
4586 set_waiting_for_input (&timeout
);
4589 /* Skip the `select' call if input is available and we're
4590 waiting for keyboard input or a cell change (which can be
4591 triggered by processing X events). In the latter case, set
4592 nfds to 1 to avoid breaking the loop. */
4594 if ((read_kbd
|| !NILP (wait_for_cell
))
4595 && detect_input_pending ())
4597 nfds
= read_kbd
? 0 : 1;
4604 #ifdef ADAPTIVE_READ_BUFFERING
4605 /* Set the timeout for adaptive read buffering if any
4606 process has non-zero read_output_skip and non-zero
4607 read_output_delay, and we are not reading output for a
4608 specific wait_channel. It is not executed if
4609 Vprocess_adaptive_read_buffering is nil. */
4610 if (process_output_skip
&& check_delay
> 0)
4612 int nsecs
= EMACS_NSECS (timeout
);
4613 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4614 nsecs
= READ_OUTPUT_DELAY_MAX
;
4615 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4617 proc
= chan_process
[channel
];
4620 /* Find minimum non-zero read_output_delay among the
4621 processes with non-zero read_output_skip. */
4622 if (XPROCESS (proc
)->read_output_delay
> 0)
4625 if (!XPROCESS (proc
)->read_output_skip
)
4627 FD_CLR (channel
, &Available
);
4628 XPROCESS (proc
)->read_output_skip
= 0;
4629 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4630 nsecs
= XPROCESS (proc
)->read_output_delay
;
4633 timeout
= make_emacs_time (0, nsecs
);
4634 process_output_skip
= 0;
4638 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4640 #elif defined (HAVE_NS)
4645 (max (max_process_desc
, max_input_desc
) + 1,
4647 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4648 NULL
, &timeout
, NULL
);
4651 /* GnuTLS buffers data internally. In lowat mode it leaves
4652 some data in the TCP buffers so that select works, but
4653 with custom pull/push functions we need to check if some
4654 data is available in the buffers manually. */
4659 /* We're not waiting on a specific process, so loop
4660 through all the channels and check for data.
4661 This is a workaround needed for some versions of
4662 the gnutls library -- 2.12.14 has been confirmed
4664 http://comments.gmane.org/gmane.emacs.devel/145074 */
4665 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4666 if (! NILP (chan_process
[channel
]))
4668 struct Lisp_Process
*p
=
4669 XPROCESS (chan_process
[channel
]);
4670 if (p
&& p
->gnutls_p
&& p
->infd
4671 && ((emacs_gnutls_record_check_pending
4676 FD_SET (p
->infd
, &Available
);
4682 /* Check this specific channel. */
4683 if (wait_proc
->gnutls_p
/* Check for valid process. */
4684 /* Do we have pending data? */
4685 && ((emacs_gnutls_record_check_pending
4686 (wait_proc
->gnutls_state
))
4690 /* Set to Available. */
4691 FD_SET (wait_proc
->infd
, &Available
);
4700 /* Make C-g and alarm signals set flags again */
4701 clear_waiting_for_input ();
4703 /* If we woke up due to SIGWINCH, actually change size now. */
4704 do_pending_window_change (0);
4706 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4707 /* We waited the full specified time, so return now. */
4711 if (xerrno
== EINTR
)
4713 else if (xerrno
== EBADF
)
4716 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4717 the child's closure of the pts gives the parent a SIGHUP, and
4718 the ptc file descriptor is automatically closed,
4719 yielding EBADF here or at select() call above.
4720 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4721 in m/ibmrt-aix.h), and here we just ignore the select error.
4722 Cleanup occurs c/o status_notify after SIGCLD. */
4723 no_avail
= 1; /* Cannot depend on values returned */
4729 error ("select error: %s", emacs_strerror (xerrno
));
4734 FD_ZERO (&Available
);
4738 /* Check for keyboard input */
4739 /* If there is any, return immediately
4740 to give it higher priority than subprocesses */
4744 unsigned old_timers_run
= timers_run
;
4745 struct buffer
*old_buffer
= current_buffer
;
4746 Lisp_Object old_window
= selected_window
;
4749 if (detect_input_pending_run_timers (do_display
))
4751 swallow_events (do_display
);
4752 if (detect_input_pending_run_timers (do_display
))
4756 /* If a timer has run, this might have changed buffers
4757 an alike. Make read_key_sequence aware of that. */
4758 if (timers_run
!= old_timers_run
4759 && waiting_for_user_input_p
== -1
4760 && (old_buffer
!= current_buffer
4761 || !EQ (old_window
, selected_window
)))
4762 record_asynch_buffer_change ();
4768 /* If there is unread keyboard input, also return. */
4770 && requeued_events_pending_p ())
4773 /* If we are not checking for keyboard input now,
4774 do process events (but don't run any timers).
4775 This is so that X events will be processed.
4776 Otherwise they may have to wait until polling takes place.
4777 That would causes delays in pasting selections, for example.
4779 (We used to do this only if wait_for_cell.) */
4780 if (read_kbd
== 0 && detect_input_pending ())
4782 swallow_events (do_display
);
4783 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4784 if (detect_input_pending ())
4789 /* Exit now if the cell we're waiting for became non-nil. */
4790 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4794 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4795 go read it. This can happen with X on BSD after logging out.
4796 In that case, there really is no input and no SIGIO,
4797 but select says there is input. */
4799 if (read_kbd
&& interrupt_input
4800 && keyboard_bit_set (&Available
) && ! noninteractive
)
4801 handle_input_available_signal (SIGIO
);
4805 got_some_input
|= nfds
> 0;
4807 /* If checking input just got us a size-change event from X,
4808 obey it now if we should. */
4809 if (read_kbd
|| ! NILP (wait_for_cell
))
4810 do_pending_window_change (0);
4812 /* Check for data from a process. */
4813 if (no_avail
|| nfds
== 0)
4816 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4818 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4820 && ((d
->condition
& FOR_READ
4821 && FD_ISSET (channel
, &Available
))
4822 || (d
->condition
& FOR_WRITE
4823 && FD_ISSET (channel
, &write_mask
))))
4824 d
->func (channel
, d
->data
);
4827 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4829 if (FD_ISSET (channel
, &Available
)
4830 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4831 && !FD_ISSET (channel
, &non_process_wait_mask
))
4835 /* If waiting for this channel, arrange to return as
4836 soon as no more input to be processed. No more
4838 if (wait_channel
== channel
)
4844 proc
= chan_process
[channel
];
4848 /* If this is a server stream socket, accept connection. */
4849 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4851 server_accept_connection (proc
, channel
);
4855 /* Read data from the process, starting with our
4856 buffered-ahead character if we have one. */
4858 nread
= read_process_output (proc
, channel
);
4861 /* Since read_process_output can run a filter,
4862 which can call accept-process-output,
4863 don't try to read from any other processes
4864 before doing the select again. */
4865 FD_ZERO (&Available
);
4868 redisplay_preserve_echo_area (12);
4871 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4874 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4875 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4877 else if (nread
== -1 && errno
== EAGAIN
)
4881 else if (nread
== -1 && errno
== EAGAIN
)
4883 /* Note that we cannot distinguish between no input
4884 available now and a closed pipe.
4885 With luck, a closed pipe will be accompanied by
4886 subprocess termination and SIGCHLD. */
4887 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4889 #endif /* O_NDELAY */
4890 #endif /* O_NONBLOCK */
4892 /* On some OSs with ptys, when the process on one end of
4893 a pty exits, the other end gets an error reading with
4894 errno = EIO instead of getting an EOF (0 bytes read).
4895 Therefore, if we get an error reading and errno =
4896 EIO, just continue, because the child process has
4897 exited and should clean itself up soon (e.g. when we
4900 However, it has been known to happen that the SIGCHLD
4901 got lost. So raise the signal again just in case.
4903 else if (nread
== -1 && errno
== EIO
)
4905 struct Lisp_Process
*p
= XPROCESS (proc
);
4907 /* Clear the descriptor now, so we only raise the
4909 FD_CLR (channel
, &input_wait_mask
);
4910 FD_CLR (channel
, &non_keyboard_wait_mask
);
4914 /* If the EIO occurs on a pty, the SIGCHLD handler's
4915 waitpid call will not find the process object to
4916 delete. Do it here. */
4917 p
->tick
= ++process_tick
;
4918 pset_status (p
, Qfailed
);
4921 handle_child_signal (SIGCHLD
);
4923 #endif /* HAVE_PTYS */
4924 /* If we can detect process termination, don't consider the
4925 process gone just because its pipe is closed. */
4927 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4932 /* Preserve status of processes already terminated. */
4933 XPROCESS (proc
)->tick
= ++process_tick
;
4934 deactivate_process (proc
);
4935 if (XPROCESS (proc
)->raw_status_new
)
4936 update_status (XPROCESS (proc
));
4937 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4938 pset_status (XPROCESS (proc
),
4939 list2 (Qexit
, make_number (256)));
4942 #ifdef NON_BLOCKING_CONNECT
4943 if (FD_ISSET (channel
, &Writeok
)
4944 && FD_ISSET (channel
, &connect_wait_mask
))
4946 struct Lisp_Process
*p
;
4948 FD_CLR (channel
, &connect_wait_mask
);
4949 FD_CLR (channel
, &write_mask
);
4950 if (--num_pending_connects
< 0)
4953 proc
= chan_process
[channel
];
4957 p
= XPROCESS (proc
);
4960 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4961 So only use it on systems where it is known to work. */
4963 socklen_t xlen
= sizeof (xerrno
);
4964 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4969 struct sockaddr pname
;
4970 int pnamelen
= sizeof (pname
);
4972 /* If connection failed, getpeername will fail. */
4974 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4976 /* Obtain connect failure code through error slippage. */
4979 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4986 p
->tick
= ++process_tick
;
4987 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
4988 deactivate_process (proc
);
4992 pset_status (p
, Qrun
);
4993 /* Execute the sentinel here. If we had relied on
4994 status_notify to do it later, it will read input
4995 from the process before calling the sentinel. */
4996 exec_sentinel (proc
, build_string ("open\n"));
4997 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4999 FD_SET (p
->infd
, &input_wait_mask
);
5000 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5004 #endif /* NON_BLOCKING_CONNECT */
5005 } /* end for each file descriptor */
5006 } /* end while exit conditions not met */
5008 unbind_to (count
, Qnil
);
5010 /* If calling from keyboard input, do not quit
5011 since we want to return C-g as an input character.
5012 Otherwise, do pending quit if requested. */
5015 /* Prevent input_pending from remaining set if we quit. */
5016 clear_input_pending ();
5020 return got_some_input
;
5023 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5026 read_process_output_call (Lisp_Object fun_and_args
)
5028 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5032 read_process_output_error_handler (Lisp_Object error_val
)
5034 cmd_error_internal (error_val
, "error in process filter: ");
5036 update_echo_area ();
5037 Fsleep_for (make_number (2), Qnil
);
5041 /* Read pending output from the process channel,
5042 starting with our buffered-ahead character if we have one.
5043 Yield number of decoded characters read.
5045 This function reads at most 4096 characters.
5046 If you want to read all available subprocess output,
5047 you must call it repeatedly until it returns zero.
5049 The characters read are decoded according to PROC's coding-system
5053 read_process_output (Lisp_Object proc
, register int channel
)
5055 register ssize_t nbytes
;
5057 register Lisp_Object outstream
;
5058 register struct Lisp_Process
*p
= XPROCESS (proc
);
5059 register ptrdiff_t opoint
;
5060 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5061 int carryover
= p
->decoding_carryover
;
5063 ptrdiff_t count
= SPECPDL_INDEX ();
5064 Lisp_Object odeactivate
;
5066 chars
= alloca (carryover
+ readmax
);
5068 /* See the comment above. */
5069 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5071 #ifdef DATAGRAM_SOCKETS
5072 /* We have a working select, so proc_buffered_char is always -1. */
5073 if (DATAGRAM_CHAN_P (channel
))
5075 socklen_t len
= datagram_address
[channel
].len
;
5076 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5077 0, datagram_address
[channel
].sa
, &len
);
5082 int buffered
= 0 <= proc_buffered_char
[channel
];
5085 chars
[carryover
] = proc_buffered_char
[channel
];
5086 proc_buffered_char
[channel
] = -1;
5090 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5091 readmax
- buffered
);
5094 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5095 readmax
- buffered
);
5096 #ifdef ADAPTIVE_READ_BUFFERING
5097 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5099 int delay
= p
->read_output_delay
;
5102 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5105 process_output_delay_count
++;
5106 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5109 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5111 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5113 process_output_delay_count
--;
5115 p
->read_output_delay
= delay
;
5118 p
->read_output_skip
= 1;
5119 process_output_skip
= 1;
5124 nbytes
+= buffered
&& nbytes
<= 0;
5127 p
->decoding_carryover
= 0;
5129 /* At this point, NBYTES holds number of bytes just received
5130 (including the one in proc_buffered_char[channel]). */
5133 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5135 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5138 /* Now set NBYTES how many bytes we must decode. */
5139 nbytes
+= carryover
;
5141 odeactivate
= Vdeactivate_mark
;
5142 /* There's no good reason to let process filters change the current
5143 buffer, and many callers of accept-process-output, sit-for, and
5144 friends don't expect current-buffer to be changed from under them. */
5145 record_unwind_current_buffer ();
5147 /* Read and dispose of the process output. */
5148 outstream
= p
->filter
;
5149 if (!NILP (outstream
))
5152 bool outer_running_asynch_code
= running_asynch_code
;
5153 int waiting
= waiting_for_user_input_p
;
5155 /* No need to gcpro these, because all we do with them later
5156 is test them for EQness, and none of them should be a string. */
5158 Lisp_Object obuffer
, okeymap
;
5159 XSETBUFFER (obuffer
, current_buffer
);
5160 okeymap
= BVAR (current_buffer
, keymap
);
5163 /* We inhibit quit here instead of just catching it so that
5164 hitting ^G when a filter happens to be running won't screw
5166 specbind (Qinhibit_quit
, Qt
);
5167 specbind (Qlast_nonmenu_event
, Qt
);
5169 /* In case we get recursively called,
5170 and we already saved the match data nonrecursively,
5171 save the same match data in safely recursive fashion. */
5172 if (outer_running_asynch_code
)
5175 /* Don't clobber the CURRENT match data, either! */
5176 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5177 restore_search_regs ();
5178 record_unwind_save_match_data ();
5179 Fset_match_data (tem
, Qt
);
5182 /* For speed, if a search happens within this code,
5183 save the match data in a special nonrecursive fashion. */
5184 running_asynch_code
= 1;
5186 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5187 text
= coding
->dst_object
;
5188 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5189 /* A new coding system might be found. */
5190 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5192 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5194 /* Don't call setup_coding_system for
5195 proc_decode_coding_system[channel] here. It is done in
5196 detect_coding called via decode_coding above. */
5198 /* If a coding system for encoding is not yet decided, we set
5199 it as the same as coding-system for decoding.
5201 But, before doing that we must check if
5202 proc_encode_coding_system[p->outfd] surely points to a
5203 valid memory because p->outfd will be changed once EOF is
5204 sent to the process. */
5205 if (NILP (p
->encode_coding_system
)
5206 && proc_encode_coding_system
[p
->outfd
])
5208 pset_encode_coding_system
5209 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5210 setup_coding_system (p
->encode_coding_system
,
5211 proc_encode_coding_system
[p
->outfd
]);
5215 if (coding
->carryover_bytes
> 0)
5217 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5218 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5219 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5220 coding
->carryover_bytes
);
5221 p
->decoding_carryover
= coding
->carryover_bytes
;
5223 if (SBYTES (text
) > 0)
5224 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5225 sometimes it's simply wrong to wrap (e.g. when called from
5226 accept-process-output). */
5227 internal_condition_case_1 (read_process_output_call
,
5229 Fcons (proc
, Fcons (text
, Qnil
))),
5230 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5231 read_process_output_error_handler
);
5233 /* If we saved the match data nonrecursively, restore it now. */
5234 restore_search_regs ();
5235 running_asynch_code
= outer_running_asynch_code
;
5237 /* Restore waiting_for_user_input_p as it was
5238 when we were called, in case the filter clobbered it. */
5239 waiting_for_user_input_p
= waiting
;
5241 #if 0 /* Call record_asynch_buffer_change unconditionally,
5242 because we might have changed minor modes or other things
5243 that affect key bindings. */
5244 if (! EQ (Fcurrent_buffer (), obuffer
)
5245 || ! EQ (current_buffer
->keymap
, okeymap
))
5247 /* But do it only if the caller is actually going to read events.
5248 Otherwise there's no need to make him wake up, and it could
5249 cause trouble (for example it would make sit_for return). */
5250 if (waiting_for_user_input_p
== -1)
5251 record_asynch_buffer_change ();
5254 /* If no filter, write into buffer if it isn't dead. */
5255 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5257 Lisp_Object old_read_only
;
5258 ptrdiff_t old_begv
, old_zv
;
5259 ptrdiff_t old_begv_byte
, old_zv_byte
;
5260 ptrdiff_t before
, before_byte
;
5261 ptrdiff_t opoint_byte
;
5265 Fset_buffer (p
->buffer
);
5267 opoint_byte
= PT_BYTE
;
5268 old_read_only
= BVAR (current_buffer
, read_only
);
5271 old_begv_byte
= BEGV_BYTE
;
5272 old_zv_byte
= ZV_BYTE
;
5274 bset_read_only (current_buffer
, Qnil
);
5276 /* Insert new output into buffer
5277 at the current end-of-output marker,
5278 thus preserving logical ordering of input and output. */
5279 if (XMARKER (p
->mark
)->buffer
)
5280 SET_PT_BOTH (clip_to_bounds (BEGV
,
5281 marker_position (p
->mark
), ZV
),
5282 clip_to_bounds (BEGV_BYTE
,
5283 marker_byte_position (p
->mark
),
5286 SET_PT_BOTH (ZV
, ZV_BYTE
);
5288 before_byte
= PT_BYTE
;
5290 /* If the output marker is outside of the visible region, save
5291 the restriction and widen. */
5292 if (! (BEGV
<= PT
&& PT
<= ZV
))
5295 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5296 text
= coding
->dst_object
;
5297 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5298 /* A new coding system might be found. See the comment in the
5299 similar code in the previous `if' block. */
5300 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5302 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5303 if (NILP (p
->encode_coding_system
)
5304 && proc_encode_coding_system
[p
->outfd
])
5306 pset_encode_coding_system
5307 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5308 setup_coding_system (p
->encode_coding_system
,
5309 proc_encode_coding_system
[p
->outfd
]);
5312 if (coding
->carryover_bytes
> 0)
5314 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5315 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5316 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5317 coding
->carryover_bytes
);
5318 p
->decoding_carryover
= coding
->carryover_bytes
;
5320 /* Adjust the multibyteness of TEXT to that of the buffer. */
5321 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5322 != ! STRING_MULTIBYTE (text
))
5323 text
= (STRING_MULTIBYTE (text
)
5324 ? Fstring_as_unibyte (text
)
5325 : Fstring_to_multibyte (text
));
5326 /* Insert before markers in case we are inserting where
5327 the buffer's mark is, and the user's next command is Meta-y. */
5328 insert_from_string_before_markers (text
, 0, 0,
5329 SCHARS (text
), SBYTES (text
), 0);
5331 /* Make sure the process marker's position is valid when the
5332 process buffer is changed in the signal_after_change above.
5333 W3 is known to do that. */
5334 if (BUFFERP (p
->buffer
)
5335 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5336 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5338 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5340 update_mode_lines
++;
5342 /* Make sure opoint and the old restrictions
5343 float ahead of any new text just as point would. */
5344 if (opoint
>= before
)
5346 opoint
+= PT
- before
;
5347 opoint_byte
+= PT_BYTE
- before_byte
;
5349 if (old_begv
> before
)
5351 old_begv
+= PT
- before
;
5352 old_begv_byte
+= PT_BYTE
- before_byte
;
5354 if (old_zv
>= before
)
5356 old_zv
+= PT
- before
;
5357 old_zv_byte
+= PT_BYTE
- before_byte
;
5360 /* If the restriction isn't what it should be, set it. */
5361 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5362 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5365 bset_read_only (current_buffer
, old_read_only
);
5366 SET_PT_BOTH (opoint
, opoint_byte
);
5368 /* Handling the process output should not deactivate the mark. */
5369 Vdeactivate_mark
= odeactivate
;
5371 unbind_to (count
, Qnil
);
5375 /* Sending data to subprocess */
5377 /* In send_process, when a write fails temporarily,
5378 wait_reading_process_output is called. It may execute user code,
5379 e.g. timers, that attempts to write new data to the same process.
5380 We must ensure that data is sent in the right order, and not
5381 interspersed half-completed with other writes (Bug#10815). This is
5382 handled by the write_queue element of struct process. It is a list
5383 with each entry having the form
5385 (string . (offset . length))
5387 where STRING is a lisp string, OFFSET is the offset into the
5388 string's byte sequence from which we should begin to send, and
5389 LENGTH is the number of bytes left to send. */
5391 /* Create a new entry in write_queue.
5392 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5393 BUF is a pointer to the string sequence of the input_obj or a C
5394 string in case of Qt or Qnil. */
5397 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5398 const char *buf
, ptrdiff_t len
, int front
)
5401 Lisp_Object entry
, obj
;
5403 if (STRINGP (input_obj
))
5405 offset
= buf
- SSDATA (input_obj
);
5411 obj
= make_unibyte_string (buf
, len
);
5414 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5417 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5419 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5422 /* Remove the first element in the write_queue of process P, put its
5423 contents in OBJ, BUF and LEN, and return non-zero. If the
5424 write_queue is empty, return zero. */
5427 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5428 const char **buf
, ptrdiff_t *len
)
5430 Lisp_Object entry
, offset_length
;
5433 if (NILP (p
->write_queue
))
5436 entry
= XCAR (p
->write_queue
);
5437 pset_write_queue (p
, XCDR (p
->write_queue
));
5439 *obj
= XCAR (entry
);
5440 offset_length
= XCDR (entry
);
5442 *len
= XINT (XCDR (offset_length
));
5443 offset
= XINT (XCAR (offset_length
));
5444 *buf
= SSDATA (*obj
) + offset
;
5449 /* Send some data to process PROC.
5450 BUF is the beginning of the data; LEN is the number of characters.
5451 OBJECT is the Lisp object that the data comes from. If OBJECT is
5452 nil or t, it means that the data comes from C string.
5454 If OBJECT is not nil, the data is encoded by PROC's coding-system
5455 for encoding before it is sent.
5457 This function can evaluate Lisp code and can garbage collect. */
5460 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5463 struct Lisp_Process
*p
= XPROCESS (proc
);
5465 struct coding_system
*coding
;
5467 if (p
->raw_status_new
)
5469 if (! EQ (p
->status
, Qrun
))
5470 error ("Process %s not running", SDATA (p
->name
));
5472 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5474 coding
= proc_encode_coding_system
[p
->outfd
];
5475 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5477 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5478 || (BUFFERP (object
)
5479 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5482 pset_encode_coding_system
5483 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5484 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5486 /* The coding system for encoding was changed to raw-text
5487 because we sent a unibyte text previously. Now we are
5488 sending a multibyte text, thus we must encode it by the
5489 original coding system specified for the current process.
5491 Another reason we come here is that the coding system
5492 was just complemented and a new one was returned by
5493 complement_process_encoding_system. */
5494 setup_coding_system (p
->encode_coding_system
, coding
);
5495 Vlast_coding_system_used
= p
->encode_coding_system
;
5497 coding
->src_multibyte
= 1;
5501 coding
->src_multibyte
= 0;
5502 /* For sending a unibyte text, character code conversion should
5503 not take place but EOL conversion should. So, setup raw-text
5504 or one of the subsidiary if we have not yet done it. */
5505 if (CODING_REQUIRE_ENCODING (coding
))
5507 if (CODING_REQUIRE_FLUSHING (coding
))
5509 /* But, before changing the coding, we must flush out data. */
5510 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5511 send_process (proc
, "", 0, Qt
);
5512 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5514 setup_coding_system (raw_text_coding_system
5515 (Vlast_coding_system_used
),
5517 coding
->src_multibyte
= 0;
5520 coding
->dst_multibyte
= 0;
5522 if (CODING_REQUIRE_ENCODING (coding
))
5524 coding
->dst_object
= Qt
;
5525 if (BUFFERP (object
))
5527 ptrdiff_t from_byte
, from
, to
;
5528 ptrdiff_t save_pt
, save_pt_byte
;
5529 struct buffer
*cur
= current_buffer
;
5531 set_buffer_internal (XBUFFER (object
));
5532 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5534 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5535 from
= BYTE_TO_CHAR (from_byte
);
5536 to
= BYTE_TO_CHAR (from_byte
+ len
);
5537 TEMP_SET_PT_BOTH (from
, from_byte
);
5538 encode_coding_object (coding
, object
, from
, from_byte
,
5539 to
, from_byte
+ len
, Qt
);
5540 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5541 set_buffer_internal (cur
);
5543 else if (STRINGP (object
))
5545 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5546 SBYTES (object
), Qt
);
5550 coding
->dst_object
= make_unibyte_string (buf
, len
);
5551 coding
->produced
= len
;
5554 len
= coding
->produced
;
5555 object
= coding
->dst_object
;
5556 buf
= SSDATA (object
);
5559 if (pty_max_bytes
== 0)
5561 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5562 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5563 if (pty_max_bytes
< 0)
5564 pty_max_bytes
= 250;
5566 pty_max_bytes
= 250;
5568 /* Deduct one, to leave space for the eof. */
5572 /* If there is already data in the write_queue, put the new data
5573 in the back of queue. Otherwise, ignore it. */
5574 if (!NILP (p
->write_queue
))
5575 write_queue_push (p
, object
, buf
, len
, 0);
5577 do /* while !NILP (p->write_queue) */
5579 ptrdiff_t cur_len
= -1;
5580 const char *cur_buf
;
5581 Lisp_Object cur_object
;
5583 /* If write_queue is empty, ignore it. */
5584 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5588 cur_object
= object
;
5593 /* Send this batch, using one or more write calls. */
5594 ptrdiff_t written
= 0;
5595 int outfd
= p
->outfd
;
5596 #ifdef DATAGRAM_SOCKETS
5597 if (DATAGRAM_CHAN_P (outfd
))
5599 rv
= sendto (outfd
, cur_buf
, cur_len
,
5600 0, datagram_address
[outfd
].sa
,
5601 datagram_address
[outfd
].len
);
5604 else if (errno
== EMSGSIZE
)
5605 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5612 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5615 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5616 rv
= (written
? 0 : -1);
5617 #ifdef ADAPTIVE_READ_BUFFERING
5618 if (p
->read_output_delay
> 0
5619 && p
->adaptive_read_buffering
== 1)
5621 p
->read_output_delay
= 0;
5622 process_output_delay_count
--;
5623 p
->read_output_skip
= 0;
5632 || errno
== EWOULDBLOCK
5638 /* Buffer is full. Wait, accepting input;
5639 that may allow the program
5640 to finish doing output and read more. */
5642 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5643 /* A gross hack to work around a bug in FreeBSD.
5644 In the following sequence, read(2) returns
5648 write(2) 954 bytes, get EAGAIN
5649 read(2) 1024 bytes in process_read_output
5650 read(2) 11 bytes in process_read_output
5652 That is, read(2) returns more bytes than have
5653 ever been written successfully. The 1033 bytes
5654 read are the 1022 bytes written successfully
5655 after processing (for example with CRs added if
5656 the terminal is set up that way which it is
5657 here). The same bytes will be seen again in a
5658 later read(2), without the CRs. */
5660 if (errno
== EAGAIN
)
5663 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5665 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5667 /* Put what we should have written in wait_queue. */
5668 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5669 wait_reading_process_output (0, 20 * 1000 * 1000,
5670 0, 0, Qnil
, NULL
, 0);
5671 /* Reread queue, to see what is left. */
5674 else if (errno
== EPIPE
)
5676 p
->raw_status_new
= 0;
5677 pset_status (p
, list2 (Qexit
, make_number (256)));
5678 p
->tick
= ++process_tick
;
5679 deactivate_process (proc
);
5680 error ("process %s no longer connected to pipe; closed it",
5684 /* This is a real error. */
5685 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5691 while (!NILP (p
->write_queue
));
5694 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5696 doc
: /* Send current contents of region as input to PROCESS.
5697 PROCESS may be a process, a buffer, the name of a process or buffer, or
5698 nil, indicating the current buffer's process.
5699 Called from program, takes three arguments, PROCESS, START and END.
5700 If the region is more than 500 characters long,
5701 it is sent in several bunches. This may happen even for shorter regions.
5702 Output from processes can arrive in between bunches. */)
5703 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5706 ptrdiff_t start1
, end1
;
5708 proc
= get_process (process
);
5709 validate_region (&start
, &end
);
5711 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5712 move_gap (XINT (start
));
5714 start1
= CHAR_TO_BYTE (XINT (start
));
5715 end1
= CHAR_TO_BYTE (XINT (end
));
5716 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5717 Fcurrent_buffer ());
5722 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5724 doc
: /* Send PROCESS the contents of STRING as input.
5725 PROCESS may be a process, a buffer, the name of a process or buffer, or
5726 nil, indicating the current buffer's process.
5727 If STRING is more than 500 characters long,
5728 it is sent in several bunches. This may happen even for shorter strings.
5729 Output from processes can arrive in between bunches. */)
5730 (Lisp_Object process
, Lisp_Object string
)
5733 CHECK_STRING (string
);
5734 proc
= get_process (process
);
5735 send_process (proc
, SSDATA (string
),
5736 SBYTES (string
), string
);
5740 /* Return the foreground process group for the tty/pty that
5741 the process P uses. */
5743 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5748 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5751 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5752 master side. Try the slave side. */
5753 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5757 ioctl (fd
, TIOCGPGRP
, &gid
);
5761 #endif /* defined (TIOCGPGRP ) */
5766 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5767 Sprocess_running_child_p
, 0, 1, 0,
5768 doc
: /* Return t if PROCESS has given the terminal to a child.
5769 If the operating system does not make it possible to find out,
5770 return t unconditionally. */)
5771 (Lisp_Object process
)
5773 /* Initialize in case ioctl doesn't exist or gives an error,
5774 in a way that will cause returning t. */
5777 struct Lisp_Process
*p
;
5779 proc
= get_process (process
);
5780 p
= XPROCESS (proc
);
5782 if (!EQ (p
->type
, Qreal
))
5783 error ("Process %s is not a subprocess",
5786 error ("Process %s is not active",
5789 gid
= emacs_get_tty_pgrp (p
);
5796 /* send a signal number SIGNO to PROCESS.
5797 If CURRENT_GROUP is t, that means send to the process group
5798 that currently owns the terminal being used to communicate with PROCESS.
5799 This is used for various commands in shell mode.
5800 If CURRENT_GROUP is lambda, that means send to the process group
5801 that currently owns the terminal, but only if it is NOT the shell itself.
5803 If NOMSG is zero, insert signal-announcements into process's buffers
5806 If we can, we try to signal PROCESS by sending control characters
5807 down the pty. This allows us to signal inferiors who have changed
5808 their uid, for which killpg would return an EPERM error. */
5811 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5815 register struct Lisp_Process
*p
;
5819 proc
= get_process (process
);
5820 p
= XPROCESS (proc
);
5822 if (!EQ (p
->type
, Qreal
))
5823 error ("Process %s is not a subprocess",
5826 error ("Process %s is not active",
5830 current_group
= Qnil
;
5832 /* If we are using pgrps, get a pgrp number and make it negative. */
5833 if (NILP (current_group
))
5834 /* Send the signal to the shell's process group. */
5838 #ifdef SIGNALS_VIA_CHARACTERS
5839 /* If possible, send signals to the entire pgrp
5840 by sending an input character to it. */
5843 cc_t
*sig_char
= NULL
;
5845 tcgetattr (p
->infd
, &t
);
5850 sig_char
= &t
.c_cc
[VINTR
];
5854 sig_char
= &t
.c_cc
[VQUIT
];
5858 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5859 sig_char
= &t
.c_cc
[VSWTCH
];
5861 sig_char
= &t
.c_cc
[VSUSP
];
5866 if (sig_char
&& *sig_char
!= CDISABLE
)
5868 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5871 /* If we can't send the signal with a character,
5872 fall through and send it another way. */
5874 /* The code above may fall through if it can't
5875 handle the signal. */
5876 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5879 /* Get the current pgrp using the tty itself, if we have that.
5880 Otherwise, use the pty to get the pgrp.
5881 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5882 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5883 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5884 His patch indicates that if TIOCGPGRP returns an error, then
5885 we should just assume that p->pid is also the process group id. */
5887 gid
= emacs_get_tty_pgrp (p
);
5890 /* If we can't get the information, assume
5891 the shell owns the tty. */
5894 /* It is not clear whether anything really can set GID to -1.
5895 Perhaps on some system one of those ioctls can or could do so.
5896 Or perhaps this is vestigial. */
5899 #else /* ! defined (TIOCGPGRP ) */
5900 /* Can't select pgrps on this system, so we know that
5901 the child itself heads the pgrp. */
5903 #endif /* ! defined (TIOCGPGRP ) */
5905 /* If current_group is lambda, and the shell owns the terminal,
5906 don't send any signal. */
5907 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5915 p
->raw_status_new
= 0;
5916 pset_status (p
, Qrun
);
5917 p
->tick
= ++process_tick
;
5920 status_notify (NULL
);
5921 redisplay_preserve_echo_area (13);
5924 #endif /* ! defined (SIGCONT) */
5928 flush_pending_output (p
->infd
);
5932 /* If we don't have process groups, send the signal to the immediate
5933 subprocess. That isn't really right, but it's better than any
5934 obvious alternative. */
5937 kill (p
->pid
, signo
);
5941 /* gid may be a pid, or minus a pgrp's number */
5943 if (!NILP (current_group
))
5945 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5946 EMACS_KILLPG (gid
, signo
);
5953 #else /* ! defined (TIOCSIGSEND) */
5954 EMACS_KILLPG (gid
, signo
);
5955 #endif /* ! defined (TIOCSIGSEND) */
5958 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5959 doc
: /* Interrupt process PROCESS.
5960 PROCESS may be a process, a buffer, or the name of a process or buffer.
5961 No arg or nil means current buffer's process.
5962 Second arg CURRENT-GROUP non-nil means send signal to
5963 the current process-group of the process's controlling terminal
5964 rather than to the process's own process group.
5965 If the process is a shell, this means interrupt current subjob
5966 rather than the shell.
5968 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5969 don't send the signal. */)
5970 (Lisp_Object process
, Lisp_Object current_group
)
5972 process_send_signal (process
, SIGINT
, current_group
, 0);
5976 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5977 doc
: /* Kill process PROCESS. May be process or name of one.
5978 See function `interrupt-process' for more details on usage. */)
5979 (Lisp_Object process
, Lisp_Object current_group
)
5981 process_send_signal (process
, SIGKILL
, current_group
, 0);
5985 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5986 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5987 See function `interrupt-process' for more details on usage. */)
5988 (Lisp_Object process
, Lisp_Object current_group
)
5990 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5994 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5995 doc
: /* Stop process PROCESS. May be process or name of one.
5996 See function `interrupt-process' for more details on usage.
5997 If PROCESS is a network or serial process, inhibit handling of incoming
5999 (Lisp_Object process
, Lisp_Object current_group
)
6001 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6003 struct Lisp_Process
*p
;
6005 p
= XPROCESS (process
);
6006 if (NILP (p
->command
)
6009 FD_CLR (p
->infd
, &input_wait_mask
);
6010 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6012 pset_command (p
, Qt
);
6016 error ("No SIGTSTP support");
6018 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6023 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6024 doc
: /* Continue process PROCESS. May be process or name of one.
6025 See function `interrupt-process' for more details on usage.
6026 If PROCESS is a network or serial process, resume handling of incoming
6028 (Lisp_Object process
, Lisp_Object current_group
)
6030 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6032 struct Lisp_Process
*p
;
6034 p
= XPROCESS (process
);
6035 if (EQ (p
->command
, Qt
)
6037 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6039 FD_SET (p
->infd
, &input_wait_mask
);
6040 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6042 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6043 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6044 #else /* not WINDOWSNT */
6045 tcflush (p
->infd
, TCIFLUSH
);
6046 #endif /* not WINDOWSNT */
6048 pset_command (p
, Qnil
);
6052 process_send_signal (process
, SIGCONT
, current_group
, 0);
6054 error ("No SIGCONT support");
6059 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6060 2, 2, "sProcess (name or number): \nnSignal code: ",
6061 doc
: /* Send PROCESS the signal with code SIGCODE.
6062 PROCESS may also be a number specifying the process id of the
6063 process to signal; in this case, the process need not be a child of
6065 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6066 (Lisp_Object process
, Lisp_Object sigcode
)
6070 if (STRINGP (process
))
6072 Lisp_Object tem
= Fget_process (process
);
6075 Lisp_Object process_number
=
6076 string_to_number (SSDATA (process
), 10, 1);
6077 if (INTEGERP (process_number
) || FLOATP (process_number
))
6078 tem
= process_number
;
6082 else if (!NUMBERP (process
))
6083 process
= get_process (process
);
6088 if (NUMBERP (process
))
6089 CONS_TO_INTEGER (process
, pid_t
, pid
);
6092 CHECK_PROCESS (process
);
6093 pid
= XPROCESS (process
)->pid
;
6095 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6098 #define parse_signal(NAME, VALUE) \
6099 else if (!xstrcasecmp (name, NAME)) \
6100 XSETINT (sigcode, VALUE)
6102 if (INTEGERP (sigcode
))
6103 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6108 CHECK_SYMBOL (sigcode
);
6109 name
= SSDATA (SYMBOL_NAME (sigcode
));
6111 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6117 parse_signal ("usr1", SIGUSR1
);
6120 parse_signal ("usr2", SIGUSR2
);
6122 parse_signal ("term", SIGTERM
);
6124 parse_signal ("hup", SIGHUP
);
6126 parse_signal ("int", SIGINT
);
6128 parse_signal ("quit", SIGQUIT
);
6130 parse_signal ("ill", SIGILL
);
6131 parse_signal ("abrt", SIGABRT
);
6133 parse_signal ("emt", SIGEMT
);
6136 parse_signal ("kill", SIGKILL
);
6138 parse_signal ("fpe", SIGFPE
);
6140 parse_signal ("bus", SIGBUS
);
6142 parse_signal ("segv", SIGSEGV
);
6144 parse_signal ("sys", SIGSYS
);
6147 parse_signal ("pipe", SIGPIPE
);
6150 parse_signal ("alrm", SIGALRM
);
6153 parse_signal ("urg", SIGURG
);
6156 parse_signal ("stop", SIGSTOP
);
6159 parse_signal ("tstp", SIGTSTP
);
6162 parse_signal ("cont", SIGCONT
);
6165 parse_signal ("chld", SIGCHLD
);
6168 parse_signal ("ttin", SIGTTIN
);
6171 parse_signal ("ttou", SIGTTOU
);
6174 parse_signal ("io", SIGIO
);
6177 parse_signal ("xcpu", SIGXCPU
);
6180 parse_signal ("xfsz", SIGXFSZ
);
6183 parse_signal ("vtalrm", SIGVTALRM
);
6186 parse_signal ("prof", SIGPROF
);
6189 parse_signal ("winch", SIGWINCH
);
6192 parse_signal ("info", SIGINFO
);
6195 error ("Undefined signal name %s", name
);
6200 return make_number (kill (pid
, XINT (sigcode
)));
6203 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6204 doc
: /* Make PROCESS see end-of-file in its input.
6205 EOF comes after any text already sent to it.
6206 PROCESS may be a process, a buffer, the name of a process or buffer, or
6207 nil, indicating the current buffer's process.
6208 If PROCESS is a network connection, or is a process communicating
6209 through a pipe (as opposed to a pty), then you cannot send any more
6210 text to PROCESS after you call this function.
6211 If PROCESS is a serial process, wait until all output written to the
6212 process has been transmitted to the serial port. */)
6213 (Lisp_Object process
)
6216 struct coding_system
*coding
;
6218 if (DATAGRAM_CONN_P (process
))
6221 proc
= get_process (process
);
6222 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6224 /* Make sure the process is really alive. */
6225 if (XPROCESS (proc
)->raw_status_new
)
6226 update_status (XPROCESS (proc
));
6227 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6228 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6230 if (CODING_REQUIRE_FLUSHING (coding
))
6232 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6233 send_process (proc
, "", 0, Qnil
);
6236 if (XPROCESS (proc
)->pty_flag
)
6237 send_process (proc
, "\004", 1, Qnil
);
6238 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6241 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6242 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6243 #endif /* not WINDOWSNT */
6244 /* Do nothing on Windows because writes are blocking. */
6248 int old_outfd
, new_outfd
;
6250 #ifdef HAVE_SHUTDOWN
6251 /* If this is a network connection, or socketpair is used
6252 for communication with the subprocess, call shutdown to cause EOF.
6253 (In some old system, shutdown to socketpair doesn't work.
6254 Then we just can't win.) */
6255 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6256 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6257 shutdown (XPROCESS (proc
)->outfd
, 1);
6258 /* In case of socketpair, outfd == infd, so don't close it. */
6259 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6260 emacs_close (XPROCESS (proc
)->outfd
);
6261 #else /* not HAVE_SHUTDOWN */
6262 emacs_close (XPROCESS (proc
)->outfd
);
6263 #endif /* not HAVE_SHUTDOWN */
6264 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6267 old_outfd
= XPROCESS (proc
)->outfd
;
6269 if (!proc_encode_coding_system
[new_outfd
])
6270 proc_encode_coding_system
[new_outfd
]
6271 = xmalloc (sizeof (struct coding_system
));
6272 *proc_encode_coding_system
[new_outfd
]
6273 = *proc_encode_coding_system
[old_outfd
];
6274 memset (proc_encode_coding_system
[old_outfd
], 0,
6275 sizeof (struct coding_system
));
6277 XPROCESS (proc
)->outfd
= new_outfd
;
6282 /* On receipt of a signal that a child status has changed, loop asking
6283 about children with changed statuses until the system says there
6286 All we do is change the status; we do not run sentinels or print
6287 notifications. That is saved for the next time keyboard input is
6288 done, in order to avoid timing errors.
6290 ** WARNING: this can be called during garbage collection.
6291 Therefore, it must not be fooled by the presence of mark bits in
6294 ** USG WARNING: Although it is not obvious from the documentation
6295 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6296 signal() before executing at least one wait(), otherwise the
6297 handler will be called again, resulting in an infinite loop. The
6298 relevant portion of the documentation reads "SIGCLD signals will be
6299 queued and the signal-catching function will be continually
6300 reentered until the queue is empty". Invoking signal() causes the
6301 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6304 ** Malloc WARNING: This should never call malloc either directly or
6305 indirectly; if it does, that is a bug */
6307 /* Record the changed status of the child process PID with wait status W. */
6309 record_child_status_change (pid_t pid
, int w
)
6313 struct Lisp_Process
*p
;
6316 /* Find the process that signaled us, and record its status. */
6318 /* The process can have been deleted by Fdelete_process. */
6319 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6321 Lisp_Object xpid
= XCAR (tail
);
6322 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6323 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6325 XSETCAR (tail
, Qnil
);
6330 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6332 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6334 proc
= XCDR (XCAR (tail
));
6335 p
= XPROCESS (proc
);
6336 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6341 /* Look for an asynchronous process whose pid hasn't been filled
6344 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6346 proc
= XCDR (XCAR (tail
));
6347 p
= XPROCESS (proc
);
6353 /* Change the status of the process that was found. */
6356 int clear_desc_flag
= 0;
6358 p
->tick
= ++process_tick
;
6360 p
->raw_status_new
= 1;
6362 /* If process has terminated, stop waiting for its output. */
6363 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6365 clear_desc_flag
= 1;
6367 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6368 if (clear_desc_flag
)
6370 FD_CLR (p
->infd
, &input_wait_mask
);
6371 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6374 /* Tell wait_reading_process_output that it needs to wake up and
6376 if (input_available_clear_time
)
6377 *input_available_clear_time
= make_emacs_time (0, 0);
6379 /* There was no asynchronous process found for that pid: we have
6380 a synchronous process. */
6383 synch_process_alive
= 0;
6385 /* Report the status of the synchronous process. */
6387 synch_process_retcode
= WEXITSTATUS (w
);
6388 else if (WIFSIGNALED (w
))
6389 synch_process_termsig
= WTERMSIG (w
);
6391 /* Tell wait_reading_process_output that it needs to wake up and
6393 if (input_available_clear_time
)
6394 *input_available_clear_time
= make_emacs_time (0, 0);
6401 /* On some systems, the SIGCHLD handler must return right away. If
6402 any more processes want to signal us, we will get another signal.
6403 Otherwise, loop around to use up all the processes that have
6404 something to tell us. */
6405 #if (defined WINDOWSNT \
6406 || (defined USG && !defined GNU_LINUX \
6407 && !(defined HPUX && defined WNOHANG)))
6408 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 0 };
6410 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 1 };
6414 handle_child_signal (int sig
)
6422 pid
= waitpid (-1, &status
, WNOHANG
| WUNTRACED
);
6423 while (pid
< 0 && errno
== EINTR
);
6425 /* PID == 0 means no processes found, PID == -1 means a real failure.
6426 Either way, we have done all our job. */
6430 record_child_status_change (pid
, status
);
6432 while (CAN_HANDLE_MULTIPLE_CHILDREN
);
6436 deliver_child_signal (int sig
)
6438 deliver_process_signal (sig
, handle_child_signal
);
6441 #endif /* SIGCHLD */
6445 exec_sentinel_unwind (Lisp_Object data
)
6447 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6452 exec_sentinel_error_handler (Lisp_Object error_val
)
6454 cmd_error_internal (error_val
, "error in process sentinel: ");
6456 update_echo_area ();
6457 Fsleep_for (make_number (2), Qnil
);
6462 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6464 Lisp_Object sentinel
, odeactivate
;
6465 struct Lisp_Process
*p
= XPROCESS (proc
);
6466 ptrdiff_t count
= SPECPDL_INDEX ();
6467 bool outer_running_asynch_code
= running_asynch_code
;
6468 int waiting
= waiting_for_user_input_p
;
6470 if (inhibit_sentinels
)
6473 /* No need to gcpro these, because all we do with them later
6474 is test them for EQness, and none of them should be a string. */
6475 odeactivate
= Vdeactivate_mark
;
6477 Lisp_Object obuffer
, okeymap
;
6478 XSETBUFFER (obuffer
, current_buffer
);
6479 okeymap
= BVAR (current_buffer
, keymap
);
6482 /* There's no good reason to let sentinels change the current
6483 buffer, and many callers of accept-process-output, sit-for, and
6484 friends don't expect current-buffer to be changed from under them. */
6485 record_unwind_current_buffer ();
6487 sentinel
= p
->sentinel
;
6488 if (NILP (sentinel
))
6491 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6492 assure that it gets restored no matter how the sentinel exits. */
6493 pset_sentinel (p
, Qnil
);
6494 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6495 /* Inhibit quit so that random quits don't screw up a running filter. */
6496 specbind (Qinhibit_quit
, Qt
);
6497 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6499 /* In case we get recursively called,
6500 and we already saved the match data nonrecursively,
6501 save the same match data in safely recursive fashion. */
6502 if (outer_running_asynch_code
)
6505 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6506 restore_search_regs ();
6507 record_unwind_save_match_data ();
6508 Fset_match_data (tem
, Qt
);
6511 /* For speed, if a search happens within this code,
6512 save the match data in a special nonrecursive fashion. */
6513 running_asynch_code
= 1;
6515 internal_condition_case_1 (read_process_output_call
,
6517 Fcons (proc
, Fcons (reason
, Qnil
))),
6518 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6519 exec_sentinel_error_handler
);
6521 /* If we saved the match data nonrecursively, restore it now. */
6522 restore_search_regs ();
6523 running_asynch_code
= outer_running_asynch_code
;
6525 Vdeactivate_mark
= odeactivate
;
6527 /* Restore waiting_for_user_input_p as it was
6528 when we were called, in case the filter clobbered it. */
6529 waiting_for_user_input_p
= waiting
;
6532 if (! EQ (Fcurrent_buffer (), obuffer
)
6533 || ! EQ (current_buffer
->keymap
, okeymap
))
6535 /* But do it only if the caller is actually going to read events.
6536 Otherwise there's no need to make him wake up, and it could
6537 cause trouble (for example it would make sit_for return). */
6538 if (waiting_for_user_input_p
== -1)
6539 record_asynch_buffer_change ();
6541 unbind_to (count
, Qnil
);
6544 /* Report all recent events of a change in process status
6545 (either run the sentinel or output a message).
6546 This is usually done while Emacs is waiting for keyboard input
6547 but can be done at other times. */
6550 status_notify (struct Lisp_Process
*deleting_process
)
6552 register Lisp_Object proc
, buffer
;
6553 Lisp_Object tail
, msg
;
6554 struct gcpro gcpro1
, gcpro2
;
6558 /* We need to gcpro tail; if read_process_output calls a filter
6559 which deletes a process and removes the cons to which tail points
6560 from Vprocess_alist, and then causes a GC, tail is an unprotected
6564 /* Set this now, so that if new processes are created by sentinels
6565 that we run, we get called again to handle their status changes. */
6566 update_tick
= process_tick
;
6568 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6571 register struct Lisp_Process
*p
;
6573 proc
= Fcdr (XCAR (tail
));
6574 p
= XPROCESS (proc
);
6576 if (p
->tick
!= p
->update_tick
)
6578 p
->update_tick
= p
->tick
;
6580 /* If process is still active, read any output that remains. */
6581 while (! EQ (p
->filter
, Qt
)
6582 && ! EQ (p
->status
, Qconnect
)
6583 && ! EQ (p
->status
, Qlisten
)
6584 /* Network or serial process not stopped: */
6585 && ! EQ (p
->command
, Qt
)
6587 && p
!= deleting_process
6588 && read_process_output (proc
, p
->infd
) > 0);
6592 /* Get the text to use for the message. */
6593 if (p
->raw_status_new
)
6595 msg
= status_message (p
);
6597 /* If process is terminated, deactivate it or delete it. */
6599 if (CONSP (p
->status
))
6600 symbol
= XCAR (p
->status
);
6602 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6603 || EQ (symbol
, Qclosed
))
6605 if (delete_exited_processes
)
6606 remove_process (proc
);
6608 deactivate_process (proc
);
6611 /* The actions above may have further incremented p->tick.
6612 So set p->update_tick again
6613 so that an error in the sentinel will not cause
6614 this code to be run again. */
6615 p
->update_tick
= p
->tick
;
6616 /* Now output the message suitably. */
6617 if (!NILP (p
->sentinel
))
6618 exec_sentinel (proc
, msg
);
6619 /* Don't bother with a message in the buffer
6620 when a process becomes runnable. */
6621 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6624 struct buffer
*old
= current_buffer
;
6625 ptrdiff_t opoint
, opoint_byte
;
6626 ptrdiff_t before
, before_byte
;
6628 /* Avoid error if buffer is deleted
6629 (probably that's why the process is dead, too) */
6630 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6632 Fset_buffer (buffer
);
6635 opoint_byte
= PT_BYTE
;
6636 /* Insert new output into buffer
6637 at the current end-of-output marker,
6638 thus preserving logical ordering of input and output. */
6639 if (XMARKER (p
->mark
)->buffer
)
6640 Fgoto_char (p
->mark
);
6642 SET_PT_BOTH (ZV
, ZV_BYTE
);
6645 before_byte
= PT_BYTE
;
6647 tem
= BVAR (current_buffer
, read_only
);
6648 bset_read_only (current_buffer
, Qnil
);
6649 insert_string ("\nProcess ");
6650 { /* FIXME: temporary kludge */
6651 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6652 insert_string (" ");
6654 bset_read_only (current_buffer
, tem
);
6655 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6657 if (opoint
>= before
)
6658 SET_PT_BOTH (opoint
+ (PT
- before
),
6659 opoint_byte
+ (PT_BYTE
- before_byte
));
6661 SET_PT_BOTH (opoint
, opoint_byte
);
6663 set_buffer_internal (old
);
6668 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6673 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6674 Sset_process_coding_system
, 1, 3, 0,
6675 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6676 DECODING will be used to decode subprocess output and ENCODING to
6677 encode subprocess input. */)
6678 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6680 register struct Lisp_Process
*p
;
6682 CHECK_PROCESS (process
);
6683 p
= XPROCESS (process
);
6685 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6687 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6688 Fcheck_coding_system (decoding
);
6689 Fcheck_coding_system (encoding
);
6690 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6691 pset_decode_coding_system (p
, decoding
);
6692 pset_encode_coding_system (p
, encoding
);
6693 setup_process_coding_systems (process
);
6698 DEFUN ("process-coding-system",
6699 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6700 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6701 (register Lisp_Object process
)
6703 CHECK_PROCESS (process
);
6704 return Fcons (XPROCESS (process
)->decode_coding_system
,
6705 XPROCESS (process
)->encode_coding_system
);
6708 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6709 Sset_process_filter_multibyte
, 2, 2, 0,
6710 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6711 If FLAG is non-nil, the filter is given multibyte strings.
6712 If FLAG is nil, the filter is given unibyte strings. In this case,
6713 all character code conversion except for end-of-line conversion is
6715 (Lisp_Object process
, Lisp_Object flag
)
6717 register struct Lisp_Process
*p
;
6719 CHECK_PROCESS (process
);
6720 p
= XPROCESS (process
);
6722 pset_decode_coding_system
6723 (p
, raw_text_coding_system (p
->decode_coding_system
));
6724 setup_process_coding_systems (process
);
6729 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6730 Sprocess_filter_multibyte_p
, 1, 1, 0,
6731 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6732 (Lisp_Object process
)
6734 register struct Lisp_Process
*p
;
6735 struct coding_system
*coding
;
6737 CHECK_PROCESS (process
);
6738 p
= XPROCESS (process
);
6739 coding
= proc_decode_coding_system
[p
->infd
];
6740 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6749 add_gpm_wait_descriptor (int desc
)
6751 add_keyboard_wait_descriptor (desc
);
6755 delete_gpm_wait_descriptor (int desc
)
6757 delete_keyboard_wait_descriptor (desc
);
6762 # ifdef USABLE_SIGIO
6764 /* Return nonzero if *MASK has a bit set
6765 that corresponds to one of the keyboard input descriptors. */
6768 keyboard_bit_set (fd_set
*mask
)
6772 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6773 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6774 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6781 #else /* not subprocesses */
6783 /* Defined on msdos.c. */
6784 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6785 EMACS_TIME
*, void *);
6787 /* Implementation of wait_reading_process_output, assuming that there
6788 are no subprocesses. Used only by the MS-DOS build.
6790 Wait for timeout to elapse and/or keyboard input to be available.
6794 If negative, gobble data immediately available but don't wait for any.
6797 an additional duration to wait, measured in nanoseconds
6798 If TIME_LIMIT is zero, then:
6799 If NSECS == 0, there is no limit.
6800 If NSECS > 0, the timeout consists of NSECS only.
6801 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6804 0 to ignore keyboard input, or
6805 1 to return when input is available, or
6806 -1 means caller will actually read the input, so don't throw to
6809 see full version for other parameters. We know that wait_proc will
6810 always be NULL, since `subprocesses' isn't defined.
6812 DO_DISPLAY means redisplay should be done to show subprocess
6813 output that arrives.
6815 Return true if we received input from any process. */
6818 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6820 Lisp_Object wait_for_cell
,
6821 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6824 EMACS_TIME end_time
, timeout
;
6831 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6832 time_limit
= TYPE_MAXIMUM (time_t);
6834 /* What does time_limit really mean? */
6835 if (time_limit
|| 0 < nsecs
)
6837 timeout
= make_emacs_time (time_limit
, nsecs
);
6838 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6841 /* Turn off periodic alarms (in case they are in use)
6842 and then turn off any other atimers,
6843 because the select emulator uses alarms. */
6845 turn_on_atimers (0);
6849 int timeout_reduced_for_timers
= 0;
6850 SELECT_TYPE waitchannels
;
6853 /* If calling from keyboard input, do not quit
6854 since we want to return C-g as an input character.
6855 Otherwise, do pending quit if requested. */
6859 /* Exit now if the cell we're waiting for became non-nil. */
6860 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6863 /* Compute time from now till when time limit is up */
6864 /* Exit if already run out */
6867 /* A negative timeout means
6868 gobble output available now
6869 but don't wait at all. */
6871 timeout
= make_emacs_time (0, 0);
6873 else if (time_limit
|| 0 < nsecs
)
6875 EMACS_TIME now
= current_emacs_time ();
6876 if (EMACS_TIME_LE (end_time
, now
))
6878 timeout
= sub_emacs_time (end_time
, now
);
6882 timeout
= make_emacs_time (100000, 0);
6885 /* If our caller will not immediately handle keyboard events,
6886 run timer events directly.
6887 (Callers that will immediately read keyboard events
6888 call timer_delay on their own.) */
6889 if (NILP (wait_for_cell
))
6891 EMACS_TIME timer_delay
;
6895 unsigned old_timers_run
= timers_run
;
6896 timer_delay
= timer_check ();
6897 if (timers_run
!= old_timers_run
&& do_display
)
6898 /* We must retry, since a timer may have requeued itself
6899 and that could alter the time delay. */
6900 redisplay_preserve_echo_area (14);
6904 while (!detect_input_pending ());
6906 /* If there is unread keyboard input, also return. */
6908 && requeued_events_pending_p ())
6911 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6913 if (EMACS_TIME_LT (timer_delay
, timeout
))
6915 timeout
= timer_delay
;
6916 timeout_reduced_for_timers
= 1;
6921 /* Cause C-g and alarm signals to take immediate action,
6922 and cause input available signals to zero out timeout. */
6924 set_waiting_for_input (&timeout
);
6926 /* If a frame has been newly mapped and needs updating,
6927 reprocess its display stuff. */
6928 if (frame_garbaged
&& do_display
)
6930 clear_waiting_for_input ();
6931 redisplay_preserve_echo_area (15);
6933 set_waiting_for_input (&timeout
);
6936 /* Wait till there is something to do. */
6937 FD_ZERO (&waitchannels
);
6938 if (read_kbd
&& detect_input_pending ())
6942 if (read_kbd
|| !NILP (wait_for_cell
))
6943 FD_SET (0, &waitchannels
);
6944 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6949 /* Make C-g and alarm signals set flags again */
6950 clear_waiting_for_input ();
6952 /* If we woke up due to SIGWINCH, actually change size now. */
6953 do_pending_window_change (0);
6955 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6956 /* We waited the full specified time, so return now. */
6961 /* If the system call was interrupted, then go around the
6963 if (xerrno
== EINTR
)
6964 FD_ZERO (&waitchannels
);
6966 error ("select error: %s", emacs_strerror (xerrno
));
6969 /* Check for keyboard input */
6972 && detect_input_pending_run_timers (do_display
))
6974 swallow_events (do_display
);
6975 if (detect_input_pending_run_timers (do_display
))
6979 /* If there is unread keyboard input, also return. */
6981 && requeued_events_pending_p ())
6984 /* If wait_for_cell. check for keyboard input
6985 but don't run any timers.
6986 ??? (It seems wrong to me to check for keyboard
6987 input at all when wait_for_cell, but the code
6988 has been this way since July 1994.
6989 Try changing this after version 19.31.) */
6990 if (! NILP (wait_for_cell
)
6991 && detect_input_pending ())
6993 swallow_events (do_display
);
6994 if (detect_input_pending ())
6998 /* Exit now if the cell we're waiting for became non-nil. */
6999 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7008 #endif /* not subprocesses */
7010 /* The following functions are needed even if async subprocesses are
7011 not supported. Some of them are no-op stubs in that case. */
7013 /* Add DESC to the set of keyboard input descriptors. */
7016 add_keyboard_wait_descriptor (int desc
)
7018 #ifdef subprocesses /* actually means "not MSDOS" */
7019 FD_SET (desc
, &input_wait_mask
);
7020 FD_SET (desc
, &non_process_wait_mask
);
7021 if (desc
> max_input_desc
)
7022 max_input_desc
= desc
;
7026 /* From now on, do not expect DESC to give keyboard input. */
7029 delete_keyboard_wait_descriptor (int desc
)
7033 int lim
= max_input_desc
;
7035 FD_CLR (desc
, &input_wait_mask
);
7036 FD_CLR (desc
, &non_process_wait_mask
);
7038 if (desc
== max_input_desc
)
7039 for (fd
= 0; fd
< lim
; fd
++)
7040 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7041 max_input_desc
= fd
;
7045 /* Setup coding systems of PROCESS. */
7048 setup_process_coding_systems (Lisp_Object process
)
7051 struct Lisp_Process
*p
= XPROCESS (process
);
7053 int outch
= p
->outfd
;
7054 Lisp_Object coding_system
;
7056 if (inch
< 0 || outch
< 0)
7059 if (!proc_decode_coding_system
[inch
])
7060 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7061 coding_system
= p
->decode_coding_system
;
7062 if (! NILP (p
->filter
))
7064 else if (BUFFERP (p
->buffer
))
7066 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7067 coding_system
= raw_text_coding_system (coding_system
);
7069 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7071 if (!proc_encode_coding_system
[outch
])
7072 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7073 setup_coding_system (p
->encode_coding_system
,
7074 proc_encode_coding_system
[outch
]);
7078 /* Close all descriptors currently in use for communication
7079 with subprocess. This is used in a newly-forked subprocess
7080 to get rid of irrelevant descriptors. */
7083 close_process_descs (void)
7087 for (i
= 0; i
< MAXDESC
; i
++)
7089 Lisp_Object process
;
7090 process
= chan_process
[i
];
7091 if (!NILP (process
))
7093 int in
= XPROCESS (process
)->infd
;
7094 int out
= XPROCESS (process
)->outfd
;
7097 if (out
>= 0 && in
!= out
)
7104 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7105 doc
: /* Return the (or a) process associated with BUFFER.
7106 BUFFER may be a buffer or the name of one. */)
7107 (register Lisp_Object buffer
)
7110 register Lisp_Object buf
, tail
, proc
;
7112 if (NILP (buffer
)) return Qnil
;
7113 buf
= Fget_buffer (buffer
);
7114 if (NILP (buf
)) return Qnil
;
7116 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7118 proc
= Fcdr (XCAR (tail
));
7119 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7122 #endif /* subprocesses */
7126 DEFUN ("process-inherit-coding-system-flag",
7127 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7129 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7130 If this flag is t, `buffer-file-coding-system' of the buffer
7131 associated with PROCESS will inherit the coding system used to decode
7132 the process output. */)
7133 (register Lisp_Object process
)
7136 CHECK_PROCESS (process
);
7137 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7139 /* Ignore the argument and return the value of
7140 inherit-process-coding-system. */
7141 return inherit_process_coding_system
? Qt
: Qnil
;
7145 /* Kill all processes associated with `buffer'.
7146 If `buffer' is nil, kill all processes */
7149 kill_buffer_processes (Lisp_Object buffer
)
7152 Lisp_Object tail
, proc
;
7154 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7156 proc
= XCDR (XCAR (tail
));
7158 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7160 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7161 Fdelete_process (proc
);
7162 else if (XPROCESS (proc
)->infd
>= 0)
7163 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7166 #else /* subprocesses */
7167 /* Since we have no subprocesses, this does nothing. */
7168 #endif /* subprocesses */
7171 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7172 Swaiting_for_user_input_p
, 0, 0, 0,
7173 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7174 This is intended for use by asynchronous process output filters and sentinels. */)
7178 return (waiting_for_user_input_p
? Qt
: Qnil
);
7184 /* Stop reading input from keyboard sources. */
7187 hold_keyboard_input (void)
7192 /* Resume reading input from keyboard sources. */
7195 unhold_keyboard_input (void)
7200 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7203 kbd_on_hold_p (void)
7205 return kbd_is_on_hold
;
7209 /* Enumeration of and access to system processes a-la ps(1). */
7211 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7213 doc
: /* Return a list of numerical process IDs of all running processes.
7214 If this functionality is unsupported, return nil.
7216 See `process-attributes' for getting attributes of a process given its ID. */)
7219 return list_system_processes ();
7222 DEFUN ("process-attributes", Fprocess_attributes
,
7223 Sprocess_attributes
, 1, 1, 0,
7224 doc
: /* Return attributes of the process given by its PID, a number.
7226 Value is an alist where each element is a cons cell of the form
7230 If this functionality is unsupported, the value is nil.
7232 See `list-system-processes' for getting a list of all process IDs.
7234 The KEYs of the attributes that this function may return are listed
7235 below, together with the type of the associated VALUE (in parentheses).
7236 Not all platforms support all of these attributes; unsupported
7237 attributes will not appear in the returned alist.
7238 Unless explicitly indicated otherwise, numbers can have either
7239 integer or floating point values.
7241 euid -- Effective user User ID of the process (number)
7242 user -- User name corresponding to euid (string)
7243 egid -- Effective user Group ID of the process (number)
7244 group -- Group name corresponding to egid (string)
7245 comm -- Command name (executable name only) (string)
7246 state -- Process state code, such as "S", "R", or "T" (string)
7247 ppid -- Parent process ID (number)
7248 pgrp -- Process group ID (number)
7249 sess -- Session ID, i.e. process ID of session leader (number)
7250 ttname -- Controlling tty name (string)
7251 tpgid -- ID of foreground process group on the process's tty (number)
7252 minflt -- number of minor page faults (number)
7253 majflt -- number of major page faults (number)
7254 cminflt -- cumulative number of minor page faults (number)
7255 cmajflt -- cumulative number of major page faults (number)
7256 utime -- user time used by the process, in (current-time) format,
7257 which is a list of integers (HIGH LOW USEC PSEC)
7258 stime -- system time used by the process (current-time)
7259 time -- sum of utime and stime (current-time)
7260 cutime -- user time used by the process and its children (current-time)
7261 cstime -- system time used by the process and its children (current-time)
7262 ctime -- sum of cutime and cstime (current-time)
7263 pri -- priority of the process (number)
7264 nice -- nice value of the process (number)
7265 thcount -- process thread count (number)
7266 start -- time the process started (current-time)
7267 vsize -- virtual memory size of the process in KB's (number)
7268 rss -- resident set size of the process in KB's (number)
7269 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7270 pcpu -- percents of CPU time used by the process (floating-point number)
7271 pmem -- percents of total physical memory used by process's resident set
7272 (floating-point number)
7273 args -- command line which invoked the process (string). */)
7276 return system_process_attributes (pid
);
7280 /* This is not called "init_process" because that is the name of a
7281 Mach system call, so it would cause problems on Darwin systems. */
7283 init_process_emacs (void)
7288 inhibit_sentinels
= 0;
7292 if (! noninteractive
|| initialized
)
7295 struct sigaction action
;
7296 emacs_sigaction_init (&action
, deliver_child_signal
);
7297 sigaction (SIGCHLD
, &action
, 0);
7301 FD_ZERO (&input_wait_mask
);
7302 FD_ZERO (&non_keyboard_wait_mask
);
7303 FD_ZERO (&non_process_wait_mask
);
7304 FD_ZERO (&write_mask
);
7305 max_process_desc
= 0;
7306 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7308 #ifdef NON_BLOCKING_CONNECT
7309 FD_ZERO (&connect_wait_mask
);
7310 num_pending_connects
= 0;
7313 #ifdef ADAPTIVE_READ_BUFFERING
7314 process_output_delay_count
= 0;
7315 process_output_skip
= 0;
7318 /* Don't do this, it caused infinite select loops. The display
7319 method should call add_keyboard_wait_descriptor on stdin if it
7322 FD_SET (0, &input_wait_mask
);
7325 Vprocess_alist
= Qnil
;
7327 deleted_pid_list
= Qnil
;
7329 for (i
= 0; i
< MAXDESC
; i
++)
7331 chan_process
[i
] = Qnil
;
7332 proc_buffered_char
[i
] = -1;
7334 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7335 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7336 #ifdef DATAGRAM_SOCKETS
7337 memset (datagram_address
, 0, sizeof datagram_address
);
7341 Lisp_Object subfeatures
= Qnil
;
7342 const struct socket_options
*sopt
;
7344 #define ADD_SUBFEATURE(key, val) \
7345 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7347 #ifdef NON_BLOCKING_CONNECT
7348 ADD_SUBFEATURE (QCnowait
, Qt
);
7350 #ifdef DATAGRAM_SOCKETS
7351 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7353 #ifdef HAVE_SEQPACKET
7354 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7356 #ifdef HAVE_LOCAL_SOCKETS
7357 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7359 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7361 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7363 #ifdef HAVE_GETSOCKNAME
7364 ADD_SUBFEATURE (QCservice
, Qt
);
7366 #if O_NONBLOCK || O_NDELAY
7367 ADD_SUBFEATURE (QCserver
, Qt
);
7370 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7371 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7373 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7376 #if defined (DARWIN_OS)
7377 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7378 processes. As such, we only change the default value. */
7381 char const *release
= (STRINGP (Voperating_system_release
)
7382 ? SSDATA (Voperating_system_release
)
7384 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7385 Vprocess_connection_type
= Qnil
;
7389 #endif /* subprocesses */
7394 syms_of_process (void)
7398 DEFSYM (Qprocessp
, "processp");
7399 DEFSYM (Qrun
, "run");
7400 DEFSYM (Qstop
, "stop");
7401 DEFSYM (Qsignal
, "signal");
7403 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7406 Qexit = intern_c_string ("exit");
7407 staticpro (&Qexit); */
7409 DEFSYM (Qopen
, "open");
7410 DEFSYM (Qclosed
, "closed");
7411 DEFSYM (Qconnect
, "connect");
7412 DEFSYM (Qfailed
, "failed");
7413 DEFSYM (Qlisten
, "listen");
7414 DEFSYM (Qlocal
, "local");
7415 DEFSYM (Qipv4
, "ipv4");
7417 DEFSYM (Qipv6
, "ipv6");
7419 DEFSYM (Qdatagram
, "datagram");
7420 DEFSYM (Qseqpacket
, "seqpacket");
7422 DEFSYM (QCport
, ":port");
7423 DEFSYM (QCspeed
, ":speed");
7424 DEFSYM (QCprocess
, ":process");
7426 DEFSYM (QCbytesize
, ":bytesize");
7427 DEFSYM (QCstopbits
, ":stopbits");
7428 DEFSYM (QCparity
, ":parity");
7429 DEFSYM (Qodd
, "odd");
7430 DEFSYM (Qeven
, "even");
7431 DEFSYM (QCflowcontrol
, ":flowcontrol");
7434 DEFSYM (QCsummary
, ":summary");
7436 DEFSYM (Qreal
, "real");
7437 DEFSYM (Qnetwork
, "network");
7438 DEFSYM (Qserial
, "serial");
7439 DEFSYM (QCbuffer
, ":buffer");
7440 DEFSYM (QChost
, ":host");
7441 DEFSYM (QCservice
, ":service");
7442 DEFSYM (QClocal
, ":local");
7443 DEFSYM (QCremote
, ":remote");
7444 DEFSYM (QCcoding
, ":coding");
7445 DEFSYM (QCserver
, ":server");
7446 DEFSYM (QCnowait
, ":nowait");
7447 DEFSYM (QCsentinel
, ":sentinel");
7448 DEFSYM (QClog
, ":log");
7449 DEFSYM (QCnoquery
, ":noquery");
7450 DEFSYM (QCstop
, ":stop");
7451 DEFSYM (QCoptions
, ":options");
7452 DEFSYM (QCplist
, ":plist");
7454 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7456 staticpro (&Vprocess_alist
);
7458 staticpro (&deleted_pid_list
);
7461 #endif /* subprocesses */
7463 DEFSYM (QCname
, ":name");
7464 DEFSYM (QCtype
, ":type");
7466 DEFSYM (Qeuid
, "euid");
7467 DEFSYM (Qegid
, "egid");
7468 DEFSYM (Quser
, "user");
7469 DEFSYM (Qgroup
, "group");
7470 DEFSYM (Qcomm
, "comm");
7471 DEFSYM (Qstate
, "state");
7472 DEFSYM (Qppid
, "ppid");
7473 DEFSYM (Qpgrp
, "pgrp");
7474 DEFSYM (Qsess
, "sess");
7475 DEFSYM (Qttname
, "ttname");
7476 DEFSYM (Qtpgid
, "tpgid");
7477 DEFSYM (Qminflt
, "minflt");
7478 DEFSYM (Qmajflt
, "majflt");
7479 DEFSYM (Qcminflt
, "cminflt");
7480 DEFSYM (Qcmajflt
, "cmajflt");
7481 DEFSYM (Qutime
, "utime");
7482 DEFSYM (Qstime
, "stime");
7483 DEFSYM (Qtime
, "time");
7484 DEFSYM (Qcutime
, "cutime");
7485 DEFSYM (Qcstime
, "cstime");
7486 DEFSYM (Qctime
, "ctime");
7487 DEFSYM (Qpri
, "pri");
7488 DEFSYM (Qnice
, "nice");
7489 DEFSYM (Qthcount
, "thcount");
7490 DEFSYM (Qstart
, "start");
7491 DEFSYM (Qvsize
, "vsize");
7492 DEFSYM (Qrss
, "rss");
7493 DEFSYM (Qetime
, "etime");
7494 DEFSYM (Qpcpu
, "pcpu");
7495 DEFSYM (Qpmem
, "pmem");
7496 DEFSYM (Qargs
, "args");
7498 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7499 doc
: /* Non-nil means delete processes immediately when they exit.
7500 A value of nil means don't delete them until `list-processes' is run. */);
7502 delete_exited_processes
= 1;
7505 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7506 doc
: /* Control type of device used to communicate with subprocesses.
7507 Values are nil to use a pipe, or t or `pty' to use a pty.
7508 The value has no effect if the system has no ptys or if all ptys are busy:
7509 then a pipe is used in any case.
7510 The value takes effect when `start-process' is called. */);
7511 Vprocess_connection_type
= Qt
;
7513 #ifdef ADAPTIVE_READ_BUFFERING
7514 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7515 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7516 On some systems, when Emacs reads the output from a subprocess, the output data
7517 is read in very small blocks, potentially resulting in very poor performance.
7518 This behavior can be remedied to some extent by setting this variable to a
7519 non-nil value, as it will automatically delay reading from such processes, to
7520 allow them to produce more output before Emacs tries to read it.
7521 If the value is t, the delay is reset after each write to the process; any other
7522 non-nil value means that the delay is not reset on write.
7523 The variable takes effect when `start-process' is called. */);
7524 Vprocess_adaptive_read_buffering
= Qt
;
7527 defsubr (&Sprocessp
);
7528 defsubr (&Sget_process
);
7529 defsubr (&Sdelete_process
);
7530 defsubr (&Sprocess_status
);
7531 defsubr (&Sprocess_exit_status
);
7532 defsubr (&Sprocess_id
);
7533 defsubr (&Sprocess_name
);
7534 defsubr (&Sprocess_tty_name
);
7535 defsubr (&Sprocess_command
);
7536 defsubr (&Sset_process_buffer
);
7537 defsubr (&Sprocess_buffer
);
7538 defsubr (&Sprocess_mark
);
7539 defsubr (&Sset_process_filter
);
7540 defsubr (&Sprocess_filter
);
7541 defsubr (&Sset_process_sentinel
);
7542 defsubr (&Sprocess_sentinel
);
7543 defsubr (&Sset_process_window_size
);
7544 defsubr (&Sset_process_inherit_coding_system_flag
);
7545 defsubr (&Sset_process_query_on_exit_flag
);
7546 defsubr (&Sprocess_query_on_exit_flag
);
7547 defsubr (&Sprocess_contact
);
7548 defsubr (&Sprocess_plist
);
7549 defsubr (&Sset_process_plist
);
7550 defsubr (&Sprocess_list
);
7551 defsubr (&Sstart_process
);
7552 defsubr (&Sserial_process_configure
);
7553 defsubr (&Smake_serial_process
);
7554 defsubr (&Sset_network_process_option
);
7555 defsubr (&Smake_network_process
);
7556 defsubr (&Sformat_network_address
);
7557 #if defined (HAVE_NET_IF_H)
7559 defsubr (&Snetwork_interface_list
);
7561 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7562 defsubr (&Snetwork_interface_info
);
7564 #endif /* defined (HAVE_NET_IF_H) */
7565 #ifdef DATAGRAM_SOCKETS
7566 defsubr (&Sprocess_datagram_address
);
7567 defsubr (&Sset_process_datagram_address
);
7569 defsubr (&Saccept_process_output
);
7570 defsubr (&Sprocess_send_region
);
7571 defsubr (&Sprocess_send_string
);
7572 defsubr (&Sinterrupt_process
);
7573 defsubr (&Skill_process
);
7574 defsubr (&Squit_process
);
7575 defsubr (&Sstop_process
);
7576 defsubr (&Scontinue_process
);
7577 defsubr (&Sprocess_running_child_p
);
7578 defsubr (&Sprocess_send_eof
);
7579 defsubr (&Ssignal_process
);
7580 defsubr (&Swaiting_for_user_input_p
);
7581 defsubr (&Sprocess_type
);
7582 defsubr (&Sset_process_coding_system
);
7583 defsubr (&Sprocess_coding_system
);
7584 defsubr (&Sset_process_filter_multibyte
);
7585 defsubr (&Sprocess_filter_multibyte_p
);
7587 #endif /* subprocesses */
7589 defsubr (&Sget_buffer_process
);
7590 defsubr (&Sprocess_inherit_coding_system_flag
);
7591 defsubr (&Slist_system_processes
);
7592 defsubr (&Sprocess_attributes
);