1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2013 Free Software
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>
97 #endif /* subprocesses */
103 #include "character.h"
108 #include "termhooks.h"
109 #include "termopts.h"
110 #include "commands.h"
111 #include "keyboard.h"
112 #include "blockinput.h"
113 #include "dispextern.h"
114 #include "composite.h"
116 #include "sysselect.h"
117 #include "syssignal.h"
123 #ifdef HAVE_WINDOW_SYSTEM
125 #endif /* HAVE_WINDOW_SYSTEM */
127 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
128 #include "xgselect.h"
132 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
133 EMACS_TIME
*, void *);
136 /* Work around GCC 4.7.0 bug with strict overflow checking; see
137 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
138 These lines can be removed once the GCC bug is fixed. */
139 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
140 # pragma GCC diagnostic ignored "-Wstrict-overflow"
143 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
144 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
145 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
146 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
147 Lisp_Object QCname
, QCtype
;
149 /* Non-zero if keyboard input is on hold, zero otherwise. */
151 static int kbd_is_on_hold
;
153 /* Nonzero means don't run process sentinels. This is used
155 int inhibit_sentinels
;
159 Lisp_Object Qprocessp
;
160 static Lisp_Object Qrun
, Qstop
, Qsignal
;
161 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
163 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
164 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
166 static Lisp_Object Qipv6
;
168 static Lisp_Object QCport
, QCprocess
;
170 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
171 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
172 static Lisp_Object QCbuffer
, QChost
, QCservice
;
173 static Lisp_Object QClocal
, QCremote
, QCcoding
;
174 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
175 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
176 static Lisp_Object Qlast_nonmenu_event
;
178 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
179 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
180 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
181 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
183 /* Number of events of change of status of a process. */
184 static EMACS_INT process_tick
;
185 /* Number of events for which the user or sentinel has been notified. */
186 static EMACS_INT update_tick
;
188 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
190 /* Only W32 has this, it really means that select can't take write mask. */
191 #ifdef BROKEN_NON_BLOCKING_CONNECT
192 #undef NON_BLOCKING_CONNECT
193 #define SELECT_CANT_DO_WRITE_MASK
195 #ifndef NON_BLOCKING_CONNECT
197 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
198 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
199 #define NON_BLOCKING_CONNECT
200 #endif /* EWOULDBLOCK || EINPROGRESS */
201 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
202 #endif /* HAVE_SELECT */
203 #endif /* NON_BLOCKING_CONNECT */
204 #endif /* BROKEN_NON_BLOCKING_CONNECT */
206 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
207 this system. We need to read full packets, so we need a
208 "non-destructive" select. So we require either native select,
209 or emulation of select using FIONREAD. */
211 #ifndef BROKEN_DATAGRAM_SOCKETS
212 # if defined HAVE_SELECT || defined USABLE_FIONREAD
213 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
214 # define DATAGRAM_SOCKETS
219 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
220 # define HAVE_SEQPACKET
223 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
224 #define ADAPTIVE_READ_BUFFERING
227 #ifdef ADAPTIVE_READ_BUFFERING
228 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
229 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
230 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
232 /* Number of processes which have a non-zero read_output_delay,
233 and therefore might be delayed for adaptive read buffering. */
235 static int process_output_delay_count
;
237 /* Non-zero if any process has non-nil read_output_skip. */
239 static int process_output_skip
;
242 #define process_output_delay_count 0
245 static void create_process (Lisp_Object
, char **, Lisp_Object
);
247 static int keyboard_bit_set (SELECT_TYPE
*);
249 static void deactivate_process (Lisp_Object
);
250 static void status_notify (struct Lisp_Process
*);
251 static int read_process_output (Lisp_Object
, int);
252 static void handle_child_signal (int);
253 static void create_pty (Lisp_Object
);
255 /* If we support a window system, turn on the code to poll periodically
256 to detect C-g. It isn't actually used when doing interrupt input. */
257 #ifdef HAVE_WINDOW_SYSTEM
258 #define POLL_FOR_INPUT
261 static Lisp_Object
get_process (register Lisp_Object name
);
262 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
264 /* Mask of bits indicating the descriptors that we wait for input on. */
266 static SELECT_TYPE input_wait_mask
;
268 /* Mask that excludes keyboard input descriptor(s). */
270 static SELECT_TYPE non_keyboard_wait_mask
;
272 /* Mask that excludes process input descriptor(s). */
274 static SELECT_TYPE non_process_wait_mask
;
276 /* Mask for selecting for write. */
278 static SELECT_TYPE write_mask
;
280 #ifdef NON_BLOCKING_CONNECT
281 /* Mask of bits indicating the descriptors that we wait for connect to
282 complete on. Once they complete, they are removed from this mask
283 and added to the input_wait_mask and non_keyboard_wait_mask. */
285 static SELECT_TYPE connect_wait_mask
;
287 /* Number of bits set in connect_wait_mask. */
288 static int num_pending_connects
;
289 #endif /* NON_BLOCKING_CONNECT */
291 /* The largest descriptor currently in use for a process object. */
292 static int max_process_desc
;
294 /* The largest descriptor currently in use for input. */
295 static int max_input_desc
;
297 /* Indexed by descriptor, gives the process (if any) for that descriptor */
298 static Lisp_Object chan_process
[MAXDESC
];
300 /* Alist of elements (NAME . PROCESS) */
301 static Lisp_Object Vprocess_alist
;
303 /* Buffered-ahead input char from process, indexed by channel.
304 -1 means empty (no char is buffered).
305 Used on sys V where the only way to tell if there is any
306 output from the process is to read at least one char.
307 Always -1 on systems that support FIONREAD. */
309 static int proc_buffered_char
[MAXDESC
];
311 /* Table of `struct coding-system' for each process. */
312 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
313 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
315 #ifdef DATAGRAM_SOCKETS
316 /* Table of `partner address' for datagram sockets. */
317 static struct sockaddr_and_len
{
320 } datagram_address
[MAXDESC
];
321 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
322 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
324 #define DATAGRAM_CHAN_P(chan) (0)
325 #define DATAGRAM_CONN_P(proc) (0)
328 /* These setters are used only in this file, so they can be private. */
330 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
335 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
340 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
342 p
->decode_coding_system
= val
;
345 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
347 p
->decoding_buf
= val
;
350 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
352 p
->encode_coding_system
= val
;
355 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
357 p
->encoding_buf
= val
;
360 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
365 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
370 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
375 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
380 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
385 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
390 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
395 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
400 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
405 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
407 p
->write_queue
= val
;
412 static struct fd_callback_data
418 int condition
; /* mask of the defines above. */
419 } fd_callback_info
[MAXDESC
];
422 /* Add a file descriptor FD to be monitored for when read is possible.
423 When read is possible, call FUNC with argument DATA. */
426 add_read_fd (int fd
, fd_callback func
, void *data
)
428 eassert (fd
< MAXDESC
);
429 add_keyboard_wait_descriptor (fd
);
431 fd_callback_info
[fd
].func
= func
;
432 fd_callback_info
[fd
].data
= data
;
433 fd_callback_info
[fd
].condition
|= FOR_READ
;
436 /* Stop monitoring file descriptor FD for when read is possible. */
439 delete_read_fd (int fd
)
441 eassert (fd
< MAXDESC
);
442 delete_keyboard_wait_descriptor (fd
);
444 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
445 if (fd_callback_info
[fd
].condition
== 0)
447 fd_callback_info
[fd
].func
= 0;
448 fd_callback_info
[fd
].data
= 0;
452 /* Add a file descriptor FD to be monitored for when write is possible.
453 When write is possible, call FUNC with argument DATA. */
456 add_write_fd (int fd
, fd_callback func
, void *data
)
458 eassert (fd
< MAXDESC
);
459 FD_SET (fd
, &write_mask
);
460 if (fd
> max_input_desc
)
463 fd_callback_info
[fd
].func
= func
;
464 fd_callback_info
[fd
].data
= data
;
465 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
468 /* Stop monitoring file descriptor FD for when write is possible. */
471 delete_write_fd (int fd
)
473 int lim
= max_input_desc
;
475 eassert (fd
< MAXDESC
);
476 FD_CLR (fd
, &write_mask
);
477 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
478 if (fd_callback_info
[fd
].condition
== 0)
480 fd_callback_info
[fd
].func
= 0;
481 fd_callback_info
[fd
].data
= 0;
483 if (fd
== max_input_desc
)
484 for (fd
= lim
; fd
>= 0; fd
--)
485 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
495 /* Compute the Lisp form of the process status, p->status, from
496 the numeric status that was returned by `wait'. */
498 static Lisp_Object
status_convert (int);
501 update_status (struct Lisp_Process
*p
)
503 eassert (p
->raw_status_new
);
504 pset_status (p
, status_convert (p
->raw_status
));
505 p
->raw_status_new
= 0;
508 /* Convert a process status word in Unix format to
509 the list that we use internally. */
512 status_convert (int w
)
515 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
516 else if (WIFEXITED (w
))
517 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
518 WCOREDUMP (w
) ? Qt
: Qnil
));
519 else if (WIFSIGNALED (w
))
520 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
521 WCOREDUMP (w
) ? Qt
: Qnil
));
526 /* Given a status-list, extract the three pieces of information
527 and store them individually through the three pointers. */
530 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
544 *code
= XFASTINT (XCAR (tem
));
546 *coredump
= !NILP (tem
);
550 /* Return a string describing a process status list. */
553 status_message (struct Lisp_Process
*p
)
555 Lisp_Object status
= p
->status
;
558 Lisp_Object string
, string2
;
560 decode_status (status
, &symbol
, &code
, &coredump
);
562 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
565 synchronize_system_messages_locale ();
566 signame
= strsignal (code
);
568 string
= build_string ("unknown");
573 string
= build_unibyte_string (signame
);
574 if (! NILP (Vlocale_coding_system
))
575 string
= (code_convert_string_norecord
576 (string
, Vlocale_coding_system
, 0));
577 c1
= STRING_CHAR (SDATA (string
));
580 Faset (string
, make_number (0), make_number (c2
));
582 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
583 return concat2 (string
, string2
);
585 else if (EQ (symbol
, Qexit
))
588 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
590 return build_string ("finished\n");
591 string
= Fnumber_to_string (make_number (code
));
592 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
593 return concat3 (build_string ("exited abnormally with code "),
596 else if (EQ (symbol
, Qfailed
))
598 string
= Fnumber_to_string (make_number (code
));
599 string2
= build_string ("\n");
600 return concat3 (build_string ("failed with code "),
604 return Fcopy_sequence (Fsymbol_name (symbol
));
609 /* The file name of the pty opened by allocate_pty. */
610 static char pty_name
[24];
612 /* Open an available pty, returning a file descriptor.
613 Return -1 on failure.
614 The file name of the terminal corresponding to the pty
615 is left in the variable pty_name. */
626 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
627 for (i
= 0; i
< 16; i
++)
630 #ifdef PTY_NAME_SPRINTF
633 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
634 #endif /* no PTY_NAME_SPRINTF */
638 #else /* no PTY_OPEN */
639 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
640 #endif /* no PTY_OPEN */
644 /* check to make certain that both sides are available
645 this avoids a nasty yet stupid bug in rlogins */
646 #ifdef PTY_TTY_NAME_SPRINTF
649 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
650 #endif /* no PTY_TTY_NAME_SPRINTF */
651 if (faccessat (AT_FDCWD
, pty_name
, R_OK
| W_OK
, AT_EACCESS
) != 0)
666 #endif /* HAVE_PTYS */
669 make_process (Lisp_Object name
)
671 register Lisp_Object val
, tem
, name1
;
672 register struct Lisp_Process
*p
;
673 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
676 p
= allocate_process ();
677 /* Initialize Lisp data. Note that allocate_process initializes all
678 Lisp data to nil, so do it only for slots which should not be nil. */
679 pset_status (p
, Qrun
);
680 pset_mark (p
, Fmake_marker ());
682 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
683 non-Lisp data, so do it only for slots which should not be zero. */
688 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
691 /* If name is already in use, modify it until it is unused. */
696 tem
= Fget_process (name1
);
697 if (NILP (tem
)) break;
698 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
702 XSETPROCESS (val
, p
);
703 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
708 remove_process (register Lisp_Object proc
)
710 register Lisp_Object pair
;
712 pair
= Frassq (proc
, Vprocess_alist
);
713 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
715 deactivate_process (proc
);
719 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
720 doc
: /* Return t if OBJECT is a process. */)
723 return PROCESSP (object
) ? Qt
: Qnil
;
726 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
727 doc
: /* Return the process named NAME, or nil if there is none. */)
728 (register Lisp_Object name
)
733 return Fcdr (Fassoc (name
, Vprocess_alist
));
736 /* This is how commands for the user decode process arguments. It
737 accepts a process, a process name, a buffer, a buffer name, or nil.
738 Buffers denote the first process in the buffer, and nil denotes the
742 get_process (register Lisp_Object name
)
744 register Lisp_Object proc
, obj
;
747 obj
= Fget_process (name
);
749 obj
= Fget_buffer (name
);
751 error ("Process %s does not exist", SDATA (name
));
753 else if (NILP (name
))
754 obj
= Fcurrent_buffer ();
758 /* Now obj should be either a buffer object or a process object.
762 proc
= Fget_buffer_process (obj
);
764 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
775 /* Fdelete_process promises to immediately forget about the process, but in
776 reality, Emacs needs to remember those processes until they have been
777 treated by the SIGCHLD handler and waitpid has been invoked on them;
778 otherwise they might fill up the kernel's process table.
780 Some processes created by call-process are also put onto this list. */
781 static Lisp_Object deleted_pid_list
;
784 record_deleted_pid (pid_t pid
)
786 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
787 /* GC treated elements set to nil. */
788 Fdelq (Qnil
, deleted_pid_list
));
792 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
793 doc
: /* Delete PROCESS: kill it and forget about it immediately.
794 PROCESS may be a process, a buffer, the name of a process or buffer, or
795 nil, indicating the current buffer's process. */)
796 (register Lisp_Object process
)
798 register struct Lisp_Process
*p
;
800 process
= get_process (process
);
801 p
= XPROCESS (process
);
803 p
->raw_status_new
= 0;
804 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
806 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
807 p
->tick
= ++process_tick
;
809 redisplay_preserve_echo_area (13);
814 record_kill_process (p
);
818 /* Update P's status, since record_kill_process will make the
819 SIGCHLD handler update deleted_pid_list, not *P. */
821 if (p
->raw_status_new
)
823 symbol
= CONSP (p
->status
) ? XCAR (p
->status
) : p
->status
;
824 if (! (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)))
825 pset_status (p
, list2 (Qsignal
, make_number (SIGKILL
)));
827 p
->tick
= ++process_tick
;
829 redisplay_preserve_echo_area (13);
832 remove_process (process
);
836 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
837 doc
: /* Return the status of PROCESS.
838 The returned value is one of the following symbols:
839 run -- for a process that is running.
840 stop -- for a process stopped but continuable.
841 exit -- for a process that has exited.
842 signal -- for a process that has got a fatal signal.
843 open -- for a network stream connection that is open.
844 listen -- for a network stream server that is listening.
845 closed -- for a network stream connection that is closed.
846 connect -- when waiting for a non-blocking connection to complete.
847 failed -- when a non-blocking connection has failed.
848 nil -- if arg is a process name and no such process exists.
849 PROCESS may be a process, a buffer, the name of a process, or
850 nil, indicating the current buffer's process. */)
851 (register Lisp_Object process
)
853 register struct Lisp_Process
*p
;
854 register Lisp_Object status
;
856 if (STRINGP (process
))
857 process
= Fget_process (process
);
859 process
= get_process (process
);
864 p
= XPROCESS (process
);
865 if (p
->raw_status_new
)
869 status
= XCAR (status
);
870 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
872 if (EQ (status
, Qexit
))
874 else if (EQ (p
->command
, Qt
))
876 else if (EQ (status
, Qrun
))
882 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
884 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
885 If PROCESS has not yet exited or died, return 0. */)
886 (register Lisp_Object process
)
888 CHECK_PROCESS (process
);
889 if (XPROCESS (process
)->raw_status_new
)
890 update_status (XPROCESS (process
));
891 if (CONSP (XPROCESS (process
)->status
))
892 return XCAR (XCDR (XPROCESS (process
)->status
));
893 return make_number (0);
896 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
897 doc
: /* Return the process id of PROCESS.
898 This is the pid of the external process which PROCESS uses or talks to.
899 For a network connection, this value is nil. */)
900 (register Lisp_Object process
)
904 CHECK_PROCESS (process
);
905 pid
= XPROCESS (process
)->pid
;
906 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
909 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
910 doc
: /* Return the name of PROCESS, as a string.
911 This is the name of the program invoked in PROCESS,
912 possibly modified to make it unique among process names. */)
913 (register Lisp_Object process
)
915 CHECK_PROCESS (process
);
916 return XPROCESS (process
)->name
;
919 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
920 doc
: /* Return the command that was executed to start PROCESS.
921 This is a list of strings, the first string being the program executed
922 and the rest of the strings being the arguments given to it.
923 For a network or serial process, this is nil (process is running) or t
924 \(process is stopped). */)
925 (register Lisp_Object process
)
927 CHECK_PROCESS (process
);
928 return XPROCESS (process
)->command
;
931 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
932 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
933 This is the terminal that the process itself reads and writes on,
934 not the name of the pty that Emacs uses to talk with that terminal. */)
935 (register Lisp_Object process
)
937 CHECK_PROCESS (process
);
938 return XPROCESS (process
)->tty_name
;
941 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
943 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
945 (register Lisp_Object process
, Lisp_Object buffer
)
947 struct Lisp_Process
*p
;
949 CHECK_PROCESS (process
);
951 CHECK_BUFFER (buffer
);
952 p
= XPROCESS (process
);
953 pset_buffer (p
, buffer
);
954 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
955 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
956 setup_process_coding_systems (process
);
960 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
962 doc
: /* Return the buffer PROCESS is associated with.
963 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
964 (register Lisp_Object process
)
966 CHECK_PROCESS (process
);
967 return XPROCESS (process
)->buffer
;
970 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
972 doc
: /* Return the marker for the end of the last output from PROCESS. */)
973 (register Lisp_Object process
)
975 CHECK_PROCESS (process
);
976 return XPROCESS (process
)->mark
;
979 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
981 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
982 A value of t means stop accepting output from the process.
984 When a process has a filter, its buffer is not used for output.
985 Instead, each time it does output, the entire string of output is
986 passed to the filter.
988 The filter gets two arguments: the process and the string of output.
989 The string argument is normally a multibyte string, except:
990 - if the process' input coding system is no-conversion or raw-text,
991 it is a unibyte string (the non-converted input), or else
992 - if `default-enable-multibyte-characters' is nil, it is a unibyte
993 string (the result of converting the decoded input multibyte
994 string to unibyte with `string-make-unibyte'). */)
995 (register Lisp_Object process
, Lisp_Object filter
)
997 struct Lisp_Process
*p
;
999 CHECK_PROCESS (process
);
1000 p
= XPROCESS (process
);
1002 /* Don't signal an error if the process' input file descriptor
1003 is closed. This could make debugging Lisp more difficult,
1004 for example when doing something like
1006 (setq process (start-process ...))
1008 (set-process-filter process ...) */
1012 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1014 FD_CLR (p
->infd
, &input_wait_mask
);
1015 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1017 else if (EQ (p
->filter
, Qt
)
1018 /* Network or serial process not stopped: */
1019 && !EQ (p
->command
, Qt
))
1021 FD_SET (p
->infd
, &input_wait_mask
);
1022 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1026 pset_filter (p
, filter
);
1027 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1028 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1029 setup_process_coding_systems (process
);
1033 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1035 doc
: /* Returns the filter function of PROCESS; nil if none.
1036 See `set-process-filter' for more info on filter functions. */)
1037 (register Lisp_Object process
)
1039 CHECK_PROCESS (process
);
1040 return XPROCESS (process
)->filter
;
1043 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1045 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1046 The sentinel is called as a function when the process changes state.
1047 It gets two arguments: the process, and a string describing the change. */)
1048 (register Lisp_Object process
, Lisp_Object sentinel
)
1050 struct Lisp_Process
*p
;
1052 CHECK_PROCESS (process
);
1053 p
= XPROCESS (process
);
1055 pset_sentinel (p
, sentinel
);
1056 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1057 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1061 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1063 doc
: /* Return the sentinel of PROCESS; nil if none.
1064 See `set-process-sentinel' for more info on sentinels. */)
1065 (register Lisp_Object process
)
1067 CHECK_PROCESS (process
);
1068 return XPROCESS (process
)->sentinel
;
1071 DEFUN ("set-process-window-size", Fset_process_window_size
,
1072 Sset_process_window_size
, 3, 3, 0,
1073 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1074 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1076 CHECK_PROCESS (process
);
1077 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1078 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1080 if (XPROCESS (process
)->infd
< 0
1081 || set_window_size (XPROCESS (process
)->infd
,
1082 XINT (height
), XINT (width
)) <= 0)
1088 DEFUN ("set-process-inherit-coding-system-flag",
1089 Fset_process_inherit_coding_system_flag
,
1090 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1091 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1092 If the second argument FLAG is non-nil, then the variable
1093 `buffer-file-coding-system' of the buffer associated with PROCESS
1094 will be bound to the value of the coding system used to decode
1097 This is useful when the coding system specified for the process buffer
1098 leaves either the character code conversion or the end-of-line conversion
1099 unspecified, or if the coding system used to decode the process output
1100 is more appropriate for saving the process buffer.
1102 Binding the variable `inherit-process-coding-system' to non-nil before
1103 starting the process is an alternative way of setting the inherit flag
1104 for the process which will run.
1106 This function returns FLAG. */)
1107 (register Lisp_Object process
, Lisp_Object flag
)
1109 CHECK_PROCESS (process
);
1110 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1114 DEFUN ("set-process-query-on-exit-flag",
1115 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1117 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1118 If the second argument FLAG is non-nil, Emacs will query the user before
1119 exiting or killing a buffer if PROCESS is running. This function
1121 (register Lisp_Object process
, Lisp_Object flag
)
1123 CHECK_PROCESS (process
);
1124 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1128 DEFUN ("process-query-on-exit-flag",
1129 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1131 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1132 (register Lisp_Object process
)
1134 CHECK_PROCESS (process
);
1135 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1138 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1140 doc
: /* Return the contact info of PROCESS; t for a real child.
1141 For a network or serial connection, the value depends on the optional
1142 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1143 SERVICE) for a network connection or (PORT SPEED) for a serial
1144 connection. If KEY is t, the complete contact information for the
1145 connection is returned, else the specific value for the keyword KEY is
1146 returned. See `make-network-process' or `make-serial-process' for a
1147 list of keywords. */)
1148 (register Lisp_Object process
, Lisp_Object key
)
1150 Lisp_Object contact
;
1152 CHECK_PROCESS (process
);
1153 contact
= XPROCESS (process
)->childp
;
1155 #ifdef DATAGRAM_SOCKETS
1156 if (DATAGRAM_CONN_P (process
)
1157 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1158 contact
= Fplist_put (contact
, QCremote
,
1159 Fprocess_datagram_address (process
));
1162 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1164 if (NILP (key
) && NETCONN_P (process
))
1165 return Fcons (Fplist_get (contact
, QChost
),
1166 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1167 if (NILP (key
) && SERIALCONN_P (process
))
1168 return Fcons (Fplist_get (contact
, QCport
),
1169 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1170 return Fplist_get (contact
, key
);
1173 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1175 doc
: /* Return the plist of PROCESS. */)
1176 (register Lisp_Object process
)
1178 CHECK_PROCESS (process
);
1179 return XPROCESS (process
)->plist
;
1182 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1184 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1185 (register Lisp_Object process
, Lisp_Object plist
)
1187 CHECK_PROCESS (process
);
1190 pset_plist (XPROCESS (process
), plist
);
1194 #if 0 /* Turned off because we don't currently record this info
1195 in the process. Perhaps add it. */
1196 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1197 doc
: /* Return the connection type of PROCESS.
1198 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1199 a socket connection. */)
1200 (Lisp_Object process
)
1202 return XPROCESS (process
)->type
;
1206 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1207 doc
: /* Return the connection type of PROCESS.
1208 The value is either the symbol `real', `network', or `serial'.
1209 PROCESS may be a process, a buffer, the name of a process or buffer, or
1210 nil, indicating the current buffer's process. */)
1211 (Lisp_Object process
)
1214 proc
= get_process (process
);
1215 return XPROCESS (proc
)->type
;
1218 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1220 doc
: /* Convert network ADDRESS from internal format to a string.
1221 A 4 or 5 element vector represents an IPv4 address (with port number).
1222 An 8 or 9 element vector represents an IPv6 address (with port number).
1223 If optional second argument OMIT-PORT is non-nil, don't include a port
1224 number in the string, even when present in ADDRESS.
1225 Returns nil if format of ADDRESS is invalid. */)
1226 (Lisp_Object address
, Lisp_Object omit_port
)
1231 if (STRINGP (address
)) /* AF_LOCAL */
1234 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1236 register struct Lisp_Vector
*p
= XVECTOR (address
);
1237 ptrdiff_t size
= p
->header
.size
;
1238 Lisp_Object args
[10];
1241 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1243 args
[0] = build_string ("%d.%d.%d.%d");
1248 args
[0] = build_string ("%d.%d.%d.%d:%d");
1251 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1253 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1258 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1264 for (i
= 0; i
< nargs
; i
++)
1266 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1269 if (nargs
<= 5 /* IPv4 */
1270 && i
< 4 /* host, not port */
1271 && XINT (p
->contents
[i
]) > 255)
1274 args
[i
+1] = p
->contents
[i
];
1277 return Fformat (nargs
+1, args
);
1280 if (CONSP (address
))
1282 Lisp_Object args
[2];
1283 args
[0] = build_string ("<Family %d>");
1284 args
[1] = Fcar (address
);
1285 return Fformat (2, args
);
1291 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1292 doc
: /* Return a list of all processes. */)
1295 return Fmapcar (Qcdr
, Vprocess_alist
);
1298 /* Starting asynchronous inferior processes. */
1300 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1302 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1303 doc
: /* Start a program in a subprocess. Return the process object for it.
1304 NAME is name for process. It is modified if necessary to make it unique.
1305 BUFFER is the buffer (or buffer name) to associate with the process.
1307 Process output (both standard output and standard error streams) goes
1308 at end of BUFFER, unless you specify an output stream or filter
1309 function to handle the output. BUFFER may also be nil, meaning that
1310 this process is not associated with any buffer.
1312 PROGRAM is the program file name. It is searched for in `exec-path'
1313 (which see). If nil, just associate a pty with the buffer. Remaining
1314 arguments are strings to give program as arguments.
1316 If you want to separate standard output from standard error, invoke
1317 the command through a shell and redirect one of them using the shell
1320 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1321 (ptrdiff_t nargs
, Lisp_Object
*args
)
1323 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1324 register unsigned char **new_argv
;
1326 ptrdiff_t count
= SPECPDL_INDEX ();
1330 buffer
= Fget_buffer_create (buffer
);
1332 /* Make sure that the child will be able to chdir to the current
1333 buffer's current directory, or its unhandled equivalent. We
1334 can't just have the child check for an error when it does the
1335 chdir, since it's in a vfork.
1337 We have to GCPRO around this because Fexpand_file_name and
1338 Funhandled_file_name_directory might call a file name handling
1339 function. The argument list is protected by the caller, so all
1340 we really have to worry about is buffer. */
1342 struct gcpro gcpro1
, gcpro2
;
1344 current_dir
= BVAR (current_buffer
, directory
);
1346 GCPRO2 (buffer
, current_dir
);
1348 current_dir
= Funhandled_file_name_directory (current_dir
);
1349 if (NILP (current_dir
))
1350 /* If the file name handler says that current_dir is unreachable, use
1351 a sensible default. */
1352 current_dir
= build_string ("~/");
1353 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1354 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1355 report_file_error ("Setting current directory",
1356 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1362 CHECK_STRING (name
);
1366 if (!NILP (program
))
1367 CHECK_STRING (program
);
1369 proc
= make_process (name
);
1370 /* If an error occurs and we can't start the process, we want to
1371 remove it from the process list. This means that each error
1372 check in create_process doesn't need to call remove_process
1373 itself; it's all taken care of here. */
1374 record_unwind_protect (start_process_unwind
, proc
);
1376 pset_childp (XPROCESS (proc
), Qt
);
1377 pset_plist (XPROCESS (proc
), Qnil
);
1378 pset_type (XPROCESS (proc
), Qreal
);
1379 pset_buffer (XPROCESS (proc
), buffer
);
1380 pset_sentinel (XPROCESS (proc
), Qnil
);
1381 pset_filter (XPROCESS (proc
), Qnil
);
1382 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1385 /* AKA GNUTLS_INITSTAGE(proc). */
1386 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1387 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1390 #ifdef ADAPTIVE_READ_BUFFERING
1391 XPROCESS (proc
)->adaptive_read_buffering
1392 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1393 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1396 /* Make the process marker point into the process buffer (if any). */
1397 if (BUFFERP (buffer
))
1398 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1399 BUF_ZV (XBUFFER (buffer
)),
1400 BUF_ZV_BYTE (XBUFFER (buffer
)));
1403 /* Decide coding systems for communicating with the process. Here
1404 we don't setup the structure coding_system nor pay attention to
1405 unibyte mode. They are done in create_process. */
1407 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1408 Lisp_Object coding_systems
= Qt
;
1409 Lisp_Object val
, *args2
;
1410 struct gcpro gcpro1
, gcpro2
;
1412 val
= Vcoding_system_for_read
;
1415 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1416 args2
[0] = Qstart_process
;
1417 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1418 GCPRO2 (proc
, current_dir
);
1419 if (!NILP (program
))
1420 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1422 if (CONSP (coding_systems
))
1423 val
= XCAR (coding_systems
);
1424 else if (CONSP (Vdefault_process_coding_system
))
1425 val
= XCAR (Vdefault_process_coding_system
);
1427 pset_decode_coding_system (XPROCESS (proc
), val
);
1429 val
= Vcoding_system_for_write
;
1432 if (EQ (coding_systems
, Qt
))
1434 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1435 args2
[0] = Qstart_process
;
1436 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1437 GCPRO2 (proc
, current_dir
);
1438 if (!NILP (program
))
1439 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1442 if (CONSP (coding_systems
))
1443 val
= XCDR (coding_systems
);
1444 else if (CONSP (Vdefault_process_coding_system
))
1445 val
= XCDR (Vdefault_process_coding_system
);
1447 pset_encode_coding_system (XPROCESS (proc
), val
);
1448 /* Note: At this moment, the above coding system may leave
1449 text-conversion or eol-conversion unspecified. They will be
1450 decided after we read output from the process and decode it by
1451 some coding system, or just before we actually send a text to
1456 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1457 XPROCESS (proc
)->decoding_carryover
= 0;
1458 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1460 XPROCESS (proc
)->inherit_coding_system_flag
1461 = !(NILP (buffer
) || !inherit_process_coding_system
);
1463 if (!NILP (program
))
1465 /* If program file name is not absolute, search our path for it.
1466 Put the name we will really use in TEM. */
1467 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1468 && !(SCHARS (program
) > 1
1469 && IS_DEVICE_SEP (SREF (program
, 1))))
1471 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1474 GCPRO4 (name
, program
, buffer
, current_dir
);
1475 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1478 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1479 tem
= Fexpand_file_name (tem
, Qnil
);
1483 if (!NILP (Ffile_directory_p (program
)))
1484 error ("Specified program for new process is a directory");
1488 /* If program file name starts with /: for quoting a magic name,
1490 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1491 && SREF (tem
, 1) == ':')
1492 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1495 Lisp_Object arg_encoding
= Qnil
;
1496 struct gcpro gcpro1
;
1499 /* Encode the file name and put it in NEW_ARGV.
1500 That's where the child will use it to execute the program. */
1501 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1503 /* Here we encode arguments by the coding system used for sending
1504 data to the process. We don't support using different coding
1505 systems for encoding arguments and for encoding data sent to the
1508 for (i
= 3; i
< nargs
; i
++)
1510 tem
= Fcons (args
[i
], tem
);
1511 CHECK_STRING (XCAR (tem
));
1512 if (STRING_MULTIBYTE (XCAR (tem
)))
1514 if (NILP (arg_encoding
))
1515 arg_encoding
= (complement_process_encoding_system
1516 (XPROCESS (proc
)->encode_coding_system
));
1518 code_convert_string_norecord
1519 (XCAR (tem
), arg_encoding
, 1));
1526 /* Now that everything is encoded we can collect the strings into
1528 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1529 new_argv
[nargs
- 2] = 0;
1531 for (i
= nargs
- 2; i
-- != 0; )
1533 new_argv
[i
] = SDATA (XCAR (tem
));
1537 create_process (proc
, (char **) new_argv
, current_dir
);
1542 return unbind_to (count
, proc
);
1545 /* This function is the unwind_protect form for Fstart_process. If
1546 PROC doesn't have its pid set, then we know someone has signaled
1547 an error and the process wasn't started successfully, so we should
1548 remove it from the process list. */
1550 start_process_unwind (Lisp_Object proc
)
1552 if (!PROCESSP (proc
))
1555 /* Was PROC started successfully?
1556 -2 is used for a pty with no process, eg for gdb. */
1557 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1558 remove_process (proc
);
1564 create_process_1 (struct atimer
*timer
)
1566 /* Nothing to do. */
1571 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1573 int inchannel
, outchannel
;
1577 int wait_child_setup
[2];
1580 /* Use volatile to protect variables from being clobbered by vfork. */
1581 volatile int forkin
, forkout
;
1582 volatile int pty_flag
= 0;
1583 volatile Lisp_Object lisp_pty_name
= Qnil
;
1584 volatile Lisp_Object encoded_current_dir
;
1586 inchannel
= outchannel
= -1;
1589 if (!NILP (Vprocess_connection_type
))
1590 outchannel
= inchannel
= allocate_pty ();
1594 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1595 /* On most USG systems it does not work to open the pty's tty here,
1596 then close it and reopen it in the child. */
1597 /* Don't let this terminal become our controlling terminal
1598 (in case we don't have one). */
1599 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1601 report_file_error ("Opening pty", Qnil
);
1603 forkin
= forkout
= -1;
1604 #endif /* not USG, or USG_SUBTTY_WORKS */
1606 lisp_pty_name
= build_string (pty_name
);
1609 #endif /* HAVE_PTYS */
1614 report_file_error ("Creating pipe", Qnil
);
1620 emacs_close (inchannel
);
1621 emacs_close (forkout
);
1622 report_file_error ("Creating pipe", Qnil
);
1632 tem
= pipe (wait_child_setup
);
1634 report_file_error ("Creating pipe", Qnil
);
1635 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1637 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1640 emacs_close (wait_child_setup
[0]);
1641 emacs_close (wait_child_setup
[1]);
1642 report_file_error ("Setting file descriptor flags", Qnil
);
1647 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1648 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1650 /* Record this as an active process, with its channels.
1651 As a result, child_setup will close Emacs's side of the pipes. */
1652 chan_process
[inchannel
] = process
;
1653 XPROCESS (process
)->infd
= inchannel
;
1654 XPROCESS (process
)->outfd
= outchannel
;
1656 /* Previously we recorded the tty descriptor used in the subprocess.
1657 It was only used for getting the foreground tty process, so now
1658 we just reopen the device (see emacs_get_tty_pgrp) as this is
1659 more portable (see USG_SUBTTY_WORKS above). */
1661 XPROCESS (process
)->pty_flag
= pty_flag
;
1662 pset_status (XPROCESS (process
), Qrun
);
1664 FD_SET (inchannel
, &input_wait_mask
);
1665 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1666 if (inchannel
> max_process_desc
)
1667 max_process_desc
= inchannel
;
1669 /* This may signal an error. */
1670 setup_process_coding_systems (process
);
1672 encoded_current_dir
= ENCODE_FILE (current_dir
);
1676 /* Block SIGCHLD until we have a chance to store the new fork's
1677 pid in its process structure. */
1678 sigemptyset (&blocked
);
1679 sigaddset (&blocked
, SIGCHLD
);
1680 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1685 #endif /* not WINDOWSNT */
1687 int xforkin
= forkin
;
1688 int xforkout
= forkout
;
1690 /* Make the pty be the controlling terminal of the process. */
1692 /* First, disconnect its current controlling terminal. */
1693 /* We tried doing setsid only if pty_flag, but it caused
1694 process_set_signal to fail on SGI when using a pipe. */
1696 /* Make the pty's terminal the controlling terminal. */
1697 if (pty_flag
&& xforkin
>= 0)
1700 /* We ignore the return value
1701 because faith@cs.unc.edu says that is necessary on Linux. */
1702 ioctl (xforkin
, TIOCSCTTY
, 0);
1705 #if defined (LDISC1)
1706 if (pty_flag
&& xforkin
>= 0)
1709 tcgetattr (xforkin
, &t
);
1711 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1712 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1715 #if defined (NTTYDISC) && defined (TIOCSETD)
1716 if (pty_flag
&& xforkin
>= 0)
1718 /* Use new line discipline. */
1719 int ldisc
= NTTYDISC
;
1720 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1725 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1726 can do TIOCSPGRP only to the process's controlling tty. */
1729 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1730 I can't test it since I don't have 4.3. */
1731 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1734 ioctl (j
, TIOCNOTTY
, 0);
1738 #endif /* TIOCNOTTY */
1740 #if !defined (DONT_REOPEN_PTY)
1741 /*** There is a suggestion that this ought to be a
1742 conditional on TIOCSPGRP, or !defined TIOCSCTTY.
1743 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1744 that system does seem to need this code, even though
1745 both TIOCSCTTY is defined. */
1746 /* Now close the pty (if we had it open) and reopen it.
1747 This makes the pty the controlling terminal of the subprocess. */
1751 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1754 emacs_close (xforkin
);
1755 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1759 emacs_write (1, "Couldn't open the pty terminal ", 31);
1760 emacs_write (1, pty_name
, strlen (pty_name
));
1761 emacs_write (1, "\n", 1);
1766 #endif /* not DONT_REOPEN_PTY */
1768 #ifdef SETUP_SLAVE_PTY
1773 #endif /* SETUP_SLAVE_PTY */
1775 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1776 Now reenable it in the child, so it will die when we want it to. */
1778 signal (SIGHUP
, SIG_DFL
);
1780 #endif /* HAVE_PTYS */
1782 signal (SIGINT
, SIG_DFL
);
1783 signal (SIGQUIT
, SIG_DFL
);
1785 /* Emacs ignores SIGPIPE, but the child should not. */
1786 signal (SIGPIPE
, SIG_DFL
);
1788 /* Stop blocking signals in the child. */
1789 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1792 child_setup_tty (xforkout
);
1794 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1795 new_argv
, 1, encoded_current_dir
);
1796 #else /* not WINDOWSNT */
1797 emacs_close (wait_child_setup
[0]);
1798 child_setup (xforkin
, xforkout
, xforkout
,
1799 new_argv
, 1, encoded_current_dir
);
1800 #endif /* not WINDOWSNT */
1803 /* Back in the parent process. */
1805 XPROCESS (process
)->pid
= pid
;
1807 XPROCESS (process
)->alive
= 1;
1809 /* Stop blocking signals in the parent. */
1810 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1816 emacs_close (forkin
);
1817 if (forkin
!= forkout
&& forkout
>= 0)
1818 emacs_close (forkout
);
1822 /* vfork succeeded. */
1825 register_child (pid
, inchannel
);
1826 #endif /* WINDOWSNT */
1828 /* If the subfork execv fails, and it exits,
1829 this close hangs. I don't know why.
1830 So have an interrupt jar it loose. */
1832 struct atimer
*timer
;
1833 EMACS_TIME offset
= make_emacs_time (1, 0);
1836 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1839 emacs_close (forkin
);
1841 cancel_atimer (timer
);
1845 if (forkin
!= forkout
&& forkout
>= 0)
1846 emacs_close (forkout
);
1848 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1851 /* Wait for child_setup to complete in case that vfork is
1852 actually defined as fork. The descriptor wait_child_setup[1]
1853 of a pipe is closed at the child side either by close-on-exec
1854 on successful execve or the _exit call in child_setup. */
1858 emacs_close (wait_child_setup
[1]);
1859 emacs_read (wait_child_setup
[0], &dummy
, 1);
1860 emacs_close (wait_child_setup
[0]);
1865 /* Now generate the error if vfork failed. */
1867 report_file_error ("Doing vfork", Qnil
);
1871 create_pty (Lisp_Object process
)
1873 int inchannel
, outchannel
;
1876 inchannel
= outchannel
= -1;
1879 if (!NILP (Vprocess_connection_type
))
1880 outchannel
= inchannel
= allocate_pty ();
1884 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1885 /* On most USG systems it does not work to open the pty's tty here,
1886 then close it and reopen it in the child. */
1887 /* Don't let this terminal become our controlling terminal
1888 (in case we don't have one). */
1889 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1891 report_file_error ("Opening pty", Qnil
);
1892 #if defined (DONT_REOPEN_PTY)
1893 /* In the case that vfork is defined as fork, the parent process
1894 (Emacs) may send some data before the child process completes
1895 tty options setup. So we setup tty before forking. */
1896 child_setup_tty (forkout
);
1897 #endif /* DONT_REOPEN_PTY */
1898 #endif /* not USG, or USG_SUBTTY_WORKS */
1901 #endif /* HAVE_PTYS */
1903 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1904 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1906 /* Record this as an active process, with its channels.
1907 As a result, child_setup will close Emacs's side of the pipes. */
1908 chan_process
[inchannel
] = process
;
1909 XPROCESS (process
)->infd
= inchannel
;
1910 XPROCESS (process
)->outfd
= outchannel
;
1912 /* Previously we recorded the tty descriptor used in the subprocess.
1913 It was only used for getting the foreground tty process, so now
1914 we just reopen the device (see emacs_get_tty_pgrp) as this is
1915 more portable (see USG_SUBTTY_WORKS above). */
1917 XPROCESS (process
)->pty_flag
= pty_flag
;
1918 pset_status (XPROCESS (process
), Qrun
);
1919 setup_process_coding_systems (process
);
1921 FD_SET (inchannel
, &input_wait_mask
);
1922 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1923 if (inchannel
> max_process_desc
)
1924 max_process_desc
= inchannel
;
1926 XPROCESS (process
)->pid
= -2;
1929 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
1932 pset_tty_name (XPROCESS (process
), Qnil
);
1936 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1937 The address family of sa is not included in the result. */
1940 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
1942 Lisp_Object address
;
1945 register struct Lisp_Vector
*p
;
1947 /* Workaround for a bug in getsockname on BSD: Names bound to
1948 sockets in the UNIX domain are inaccessible; getsockname returns
1949 a zero length name. */
1950 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
1951 return empty_unibyte_string
;
1953 switch (sa
->sa_family
)
1957 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
1958 len
= sizeof (sin
->sin_addr
) + 1;
1959 address
= Fmake_vector (make_number (len
), Qnil
);
1960 p
= XVECTOR (address
);
1961 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
1962 cp
= (unsigned char *) &sin
->sin_addr
;
1968 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
1969 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
1970 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
1971 address
= Fmake_vector (make_number (len
), Qnil
);
1972 p
= XVECTOR (address
);
1973 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
1974 for (i
= 0; i
< len
; i
++)
1975 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
1979 #ifdef HAVE_LOCAL_SOCKETS
1982 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
1983 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
1984 if (sockun
->sun_path
[i
] == 0)
1986 return make_unibyte_string (sockun
->sun_path
, i
);
1990 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
1991 address
= Fcons (make_number (sa
->sa_family
),
1992 Fmake_vector (make_number (len
), Qnil
));
1993 p
= XVECTOR (XCDR (address
));
1994 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2000 p
->contents
[i
++] = make_number (*cp
++);
2006 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2009 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2011 register struct Lisp_Vector
*p
;
2013 if (VECTORP (address
))
2015 p
= XVECTOR (address
);
2016 if (p
->header
.size
== 5)
2019 return sizeof (struct sockaddr_in
);
2022 else if (p
->header
.size
== 9)
2024 *familyp
= AF_INET6
;
2025 return sizeof (struct sockaddr_in6
);
2029 #ifdef HAVE_LOCAL_SOCKETS
2030 else if (STRINGP (address
))
2032 *familyp
= AF_LOCAL
;
2033 return sizeof (struct sockaddr_un
);
2036 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2037 && VECTORP (XCDR (address
)))
2039 struct sockaddr
*sa
;
2040 *familyp
= XINT (XCAR (address
));
2041 p
= XVECTOR (XCDR (address
));
2042 return p
->header
.size
+ sizeof (sa
->sa_family
);
2047 /* Convert an address object (vector or string) to an internal sockaddr.
2049 The address format has been basically validated by
2050 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2051 it could have come from user data. So if FAMILY is not valid,
2052 we return after zeroing *SA. */
2055 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2057 register struct Lisp_Vector
*p
;
2058 register unsigned char *cp
= NULL
;
2062 memset (sa
, 0, len
);
2064 if (VECTORP (address
))
2066 p
= XVECTOR (address
);
2067 if (family
== AF_INET
)
2069 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2070 len
= sizeof (sin
->sin_addr
) + 1;
2071 hostport
= XINT (p
->contents
[--len
]);
2072 sin
->sin_port
= htons (hostport
);
2073 cp
= (unsigned char *)&sin
->sin_addr
;
2074 sa
->sa_family
= family
;
2077 else if (family
== AF_INET6
)
2079 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2080 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2081 len
= sizeof (sin6
->sin6_addr
) + 1;
2082 hostport
= XINT (p
->contents
[--len
]);
2083 sin6
->sin6_port
= htons (hostport
);
2084 for (i
= 0; i
< len
; i
++)
2085 if (INTEGERP (p
->contents
[i
]))
2087 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2090 sa
->sa_family
= family
;
2097 else if (STRINGP (address
))
2099 #ifdef HAVE_LOCAL_SOCKETS
2100 if (family
== AF_LOCAL
)
2102 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2103 cp
= SDATA (address
);
2104 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2105 sockun
->sun_path
[i
] = *cp
++;
2106 sa
->sa_family
= family
;
2113 p
= XVECTOR (XCDR (address
));
2114 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2117 for (i
= 0; i
< len
; i
++)
2118 if (INTEGERP (p
->contents
[i
]))
2119 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2122 #ifdef DATAGRAM_SOCKETS
2123 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2125 doc
: /* Get the current datagram address associated with PROCESS. */)
2126 (Lisp_Object process
)
2130 CHECK_PROCESS (process
);
2132 if (!DATAGRAM_CONN_P (process
))
2135 channel
= XPROCESS (process
)->infd
;
2136 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2137 datagram_address
[channel
].len
);
2140 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2142 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2143 Returns nil upon error setting address, ADDRESS otherwise. */)
2144 (Lisp_Object process
, Lisp_Object address
)
2149 CHECK_PROCESS (process
);
2151 if (!DATAGRAM_CONN_P (process
))
2154 channel
= XPROCESS (process
)->infd
;
2156 len
= get_lisp_to_sockaddr_size (address
, &family
);
2157 if (datagram_address
[channel
].len
!= len
)
2159 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2165 static const struct socket_options
{
2166 /* The name of this option. Should be lowercase version of option
2167 name without SO_ prefix. */
2169 /* Option level SOL_... */
2171 /* Option number SO_... */
2173 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2174 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2175 } socket_options
[] =
2177 #ifdef SO_BINDTODEVICE
2178 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2181 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2184 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2187 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2190 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2193 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2196 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2199 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2201 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2204 /* Set option OPT to value VAL on socket S.
2206 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2207 Signals an error if setting a known option fails.
2211 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2214 const struct socket_options
*sopt
;
2219 name
= SSDATA (SYMBOL_NAME (opt
));
2220 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2221 if (strcmp (name
, sopt
->name
) == 0)
2224 switch (sopt
->opttype
)
2229 optval
= NILP (val
) ? 0 : 1;
2230 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2231 &optval
, sizeof (optval
));
2238 if (TYPE_RANGED_INTEGERP (int, val
))
2239 optval
= XINT (val
);
2241 error ("Bad option value for %s", name
);
2242 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2243 &optval
, sizeof (optval
));
2247 #ifdef SO_BINDTODEVICE
2250 char devname
[IFNAMSIZ
+1];
2252 /* This is broken, at least in the Linux 2.4 kernel.
2253 To unbind, the arg must be a zero integer, not the empty string.
2254 This should work on all systems. KFS. 2003-09-23. */
2255 memset (devname
, 0, sizeof devname
);
2258 char *arg
= SSDATA (val
);
2259 int len
= min (strlen (arg
), IFNAMSIZ
);
2260 memcpy (devname
, arg
, len
);
2262 else if (!NILP (val
))
2263 error ("Bad option value for %s", name
);
2264 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2273 struct linger linger
;
2276 linger
.l_linger
= 0;
2277 if (TYPE_RANGED_INTEGERP (int, val
))
2278 linger
.l_linger
= XINT (val
);
2280 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2281 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2282 &linger
, sizeof (linger
));
2292 report_file_error ("Cannot set network option",
2293 Fcons (opt
, Fcons (val
, Qnil
)));
2294 return (1 << sopt
->optbit
);
2298 DEFUN ("set-network-process-option",
2299 Fset_network_process_option
, Sset_network_process_option
,
2301 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2302 See `make-network-process' for a list of options and values.
2303 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2304 OPTION is not a supported option, return nil instead; otherwise return t. */)
2305 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2308 struct Lisp_Process
*p
;
2310 CHECK_PROCESS (process
);
2311 p
= XPROCESS (process
);
2312 if (!NETCONN1_P (p
))
2313 error ("Process is not a network process");
2317 error ("Process is not running");
2319 if (set_socket_option (s
, option
, value
))
2321 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2325 if (NILP (no_error
))
2326 error ("Unknown or unsupported option");
2332 DEFUN ("serial-process-configure",
2333 Fserial_process_configure
,
2334 Sserial_process_configure
,
2336 doc
: /* Configure speed, bytesize, etc. of a serial process.
2338 Arguments are specified as keyword/argument pairs. Attributes that
2339 are not given are re-initialized from the process's current
2340 configuration (available via the function `process-contact') or set to
2341 reasonable default values. The following arguments are defined:
2347 -- Any of these arguments can be given to identify the process that is
2348 to be configured. If none of these arguments is given, the current
2349 buffer's process is used.
2351 :speed SPEED -- SPEED is the speed of the serial port in bits per
2352 second, also called baud rate. Any value can be given for SPEED, but
2353 most serial ports work only at a few defined values between 1200 and
2354 115200, with 9600 being the most common value. If SPEED is nil, the
2355 serial port is not configured any further, i.e., all other arguments
2356 are ignored. This may be useful for special serial ports such as
2357 Bluetooth-to-serial converters which can only be configured through AT
2358 commands. A value of nil for SPEED can be used only when passed
2359 through `make-serial-process' or `serial-term'.
2361 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2362 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2364 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2365 `odd' (use odd parity), or the symbol `even' (use even parity). If
2366 PARITY is not given, no parity is used.
2368 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2369 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2370 is not given or nil, 1 stopbit is used.
2372 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2373 flowcontrol to be used, which is either nil (don't use flowcontrol),
2374 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2375 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2376 flowcontrol is used.
2378 `serial-process-configure' is called by `make-serial-process' for the
2379 initial configuration of the serial port.
2383 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2385 \(serial-process-configure
2386 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2388 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2390 usage: (serial-process-configure &rest ARGS) */)
2391 (ptrdiff_t nargs
, Lisp_Object
*args
)
2393 struct Lisp_Process
*p
;
2394 Lisp_Object contact
= Qnil
;
2395 Lisp_Object proc
= Qnil
;
2396 struct gcpro gcpro1
;
2398 contact
= Flist (nargs
, args
);
2401 proc
= Fplist_get (contact
, QCprocess
);
2403 proc
= Fplist_get (contact
, QCname
);
2405 proc
= Fplist_get (contact
, QCbuffer
);
2407 proc
= Fplist_get (contact
, QCport
);
2408 proc
= get_process (proc
);
2409 p
= XPROCESS (proc
);
2410 if (!EQ (p
->type
, Qserial
))
2411 error ("Not a serial process");
2413 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2419 serial_configure (p
, contact
);
2425 /* Used by make-serial-process to recover from errors. */
2427 make_serial_process_unwind (Lisp_Object proc
)
2429 if (!PROCESSP (proc
))
2431 remove_process (proc
);
2435 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2437 doc
: /* Create and return a serial port process.
2439 In Emacs, serial port connections are represented by process objects,
2440 so input and output work as for subprocesses, and `delete-process'
2441 closes a serial port connection. However, a serial process has no
2442 process id, it cannot be signaled, and the status codes are different
2443 from normal processes.
2445 `make-serial-process' creates a process and a buffer, on which you
2446 probably want to use `process-send-string'. Try \\[serial-term] for
2447 an interactive terminal. See below for examples.
2449 Arguments are specified as keyword/argument pairs. The following
2450 arguments are defined:
2452 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2453 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2454 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2455 the backslashes in strings).
2457 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2458 which this function calls.
2460 :name NAME -- NAME is the name of the process. If NAME is not given,
2461 the value of PORT is used.
2463 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2464 with the process. Process output goes at the end of that buffer,
2465 unless you specify an output stream or filter function to handle the
2466 output. If BUFFER is not given, the value of NAME is used.
2468 :coding CODING -- If CODING is a symbol, it specifies the coding
2469 system used for both reading and writing for this process. If CODING
2470 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2471 ENCODING is used for writing.
2473 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2474 the process is running. If BOOL is not given, query before exiting.
2476 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2477 In the stopped state, a serial process does not accept incoming data,
2478 but you can send outgoing data. The stopped state is cleared by
2479 `continue-process' and set by `stop-process'.
2481 :filter FILTER -- Install FILTER as the process filter.
2483 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2485 :plist PLIST -- Install PLIST as the initial plist of the process.
2491 -- This function calls `serial-process-configure' to handle these
2494 The original argument list, possibly modified by later configuration,
2495 is available via the function `process-contact'.
2499 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2501 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2503 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2505 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2507 usage: (make-serial-process &rest ARGS) */)
2508 (ptrdiff_t nargs
, Lisp_Object
*args
)
2511 Lisp_Object proc
, contact
, port
;
2512 struct Lisp_Process
*p
;
2513 struct gcpro gcpro1
;
2514 Lisp_Object name
, buffer
;
2515 Lisp_Object tem
, val
;
2516 ptrdiff_t specpdl_count
= -1;
2521 contact
= Flist (nargs
, args
);
2524 port
= Fplist_get (contact
, QCport
);
2526 error ("No port specified");
2527 CHECK_STRING (port
);
2529 if (NILP (Fplist_member (contact
, QCspeed
)))
2530 error (":speed not specified");
2531 if (!NILP (Fplist_get (contact
, QCspeed
)))
2532 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2534 name
= Fplist_get (contact
, QCname
);
2537 CHECK_STRING (name
);
2538 proc
= make_process (name
);
2539 specpdl_count
= SPECPDL_INDEX ();
2540 record_unwind_protect (make_serial_process_unwind
, proc
);
2541 p
= XPROCESS (proc
);
2543 fd
= serial_open (SSDATA (port
));
2546 if (fd
> max_process_desc
)
2547 max_process_desc
= fd
;
2548 chan_process
[fd
] = proc
;
2550 buffer
= Fplist_get (contact
, QCbuffer
);
2553 buffer
= Fget_buffer_create (buffer
);
2554 pset_buffer (p
, buffer
);
2556 pset_childp (p
, contact
);
2557 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2558 pset_type (p
, Qserial
);
2559 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2560 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2562 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2563 p
->kill_without_query
= 1;
2564 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2565 pset_command (p
, Qt
);
2568 if (!EQ (p
->command
, Qt
))
2570 FD_SET (fd
, &input_wait_mask
);
2571 FD_SET (fd
, &non_keyboard_wait_mask
);
2574 if (BUFFERP (buffer
))
2576 set_marker_both (p
->mark
, buffer
,
2577 BUF_ZV (XBUFFER (buffer
)),
2578 BUF_ZV_BYTE (XBUFFER (buffer
)));
2581 tem
= Fplist_member (contact
, QCcoding
);
2582 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2588 val
= XCAR (XCDR (tem
));
2592 else if (!NILP (Vcoding_system_for_read
))
2593 val
= Vcoding_system_for_read
;
2594 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2595 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2597 pset_decode_coding_system (p
, val
);
2602 val
= XCAR (XCDR (tem
));
2606 else if (!NILP (Vcoding_system_for_write
))
2607 val
= Vcoding_system_for_write
;
2608 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2609 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2611 pset_encode_coding_system (p
, val
);
2613 setup_process_coding_systems (proc
);
2614 pset_decoding_buf (p
, empty_unibyte_string
);
2615 p
->decoding_carryover
= 0;
2616 pset_encoding_buf (p
, empty_unibyte_string
);
2617 p
->inherit_coding_system_flag
2618 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2620 Fserial_process_configure (nargs
, args
);
2622 specpdl_ptr
= specpdl
+ specpdl_count
;
2628 /* Create a network stream/datagram client/server process. Treated
2629 exactly like a normal process when reading and writing. Primary
2630 differences are in status display and process deletion. A network
2631 connection has no PID; you cannot signal it. All you can do is
2632 stop/continue it and deactivate/close it via delete-process */
2634 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2636 doc
: /* Create and return a network server or client process.
2638 In Emacs, network connections are represented by process objects, so
2639 input and output work as for subprocesses and `delete-process' closes
2640 a network connection. However, a network process has no process id,
2641 it cannot be signaled, and the status codes are different from normal
2644 Arguments are specified as keyword/argument pairs. The following
2645 arguments are defined:
2647 :name NAME -- NAME is name for process. It is modified if necessary
2650 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2651 with the process. Process output goes at end of that buffer, unless
2652 you specify an output stream or filter function to handle the output.
2653 BUFFER may be also nil, meaning that this process is not associated
2656 :host HOST -- HOST is name of the host to connect to, or its IP
2657 address. The symbol `local' specifies the local host. If specified
2658 for a server process, it must be a valid name or address for the local
2659 host, and only clients connecting to that address will be accepted.
2661 :service SERVICE -- SERVICE is name of the service desired, or an
2662 integer specifying a port number to connect to. If SERVICE is t,
2663 a random port number is selected for the server. (If Emacs was
2664 compiled with getaddrinfo, a port number can also be specified as a
2665 string, e.g. "80", as well as an integer. This is not portable.)
2667 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2668 stream type connection, `datagram' creates a datagram type connection,
2669 `seqpacket' creates a reliable datagram connection.
2671 :family FAMILY -- FAMILY is the address (and protocol) family for the
2672 service specified by HOST and SERVICE. The default (nil) is to use
2673 whatever address family (IPv4 or IPv6) that is defined for the host
2674 and port number specified by HOST and SERVICE. Other address families
2676 local -- for a local (i.e. UNIX) address specified by SERVICE.
2677 ipv4 -- use IPv4 address family only.
2678 ipv6 -- use IPv6 address family only.
2680 :local ADDRESS -- ADDRESS is the local address used for the connection.
2681 This parameter is ignored when opening a client process. When specified
2682 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2684 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2685 connection. This parameter is ignored when opening a stream server
2686 process. For a datagram server process, it specifies the initial
2687 setting of the remote datagram address. When specified for a client
2688 process, the FAMILY, HOST, and SERVICE args are ignored.
2690 The format of ADDRESS depends on the address family:
2691 - An IPv4 address is represented as an vector of integers [A B C D P]
2692 corresponding to numeric IP address A.B.C.D and port number P.
2693 - A local address is represented as a string with the address in the
2694 local address space.
2695 - An "unsupported family" address is represented by a cons (F . AV)
2696 where F is the family number and AV is a vector containing the socket
2697 address data with one element per address data byte. Do not rely on
2698 this format in portable code, as it may depend on implementation
2699 defined constants, data sizes, and data structure alignment.
2701 :coding CODING -- If CODING is a symbol, it specifies the coding
2702 system used for both reading and writing for this process. If CODING
2703 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2704 ENCODING is used for writing.
2706 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2707 return without waiting for the connection to complete; instead, the
2708 sentinel function will be called with second arg matching "open" (if
2709 successful) or "failed" when the connect completes. Default is to use
2710 a blocking connect (i.e. wait) for stream type connections.
2712 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2713 running when Emacs is exited.
2715 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2716 In the stopped state, a server process does not accept new
2717 connections, and a client process does not handle incoming traffic.
2718 The stopped state is cleared by `continue-process' and set by
2721 :filter FILTER -- Install FILTER as the process filter.
2723 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2724 process filter are multibyte, otherwise they are unibyte.
2725 If this keyword is not specified, the strings are multibyte if
2726 the default value of `enable-multibyte-characters' is non-nil.
2728 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2730 :log LOG -- Install LOG as the server process log function. This
2731 function is called when the server accepts a network connection from a
2732 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2733 is the server process, CLIENT is the new process for the connection,
2734 and MESSAGE is a string.
2736 :plist PLIST -- Install PLIST as the new process' initial plist.
2738 :server QLEN -- if QLEN is non-nil, create a server process for the
2739 specified FAMILY, SERVICE, and connection type (stream or datagram).
2740 If QLEN is an integer, it is used as the max. length of the server's
2741 pending connection queue (also known as the backlog); the default
2742 queue length is 5. Default is to create a client process.
2744 The following network options can be specified for this connection:
2746 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2747 :dontroute BOOL -- Only send to directly connected hosts.
2748 :keepalive BOOL -- Send keep-alive messages on network stream.
2749 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2750 :oobinline BOOL -- Place out-of-band data in receive data stream.
2751 :priority INT -- Set protocol defined priority for sent packets.
2752 :reuseaddr BOOL -- Allow reusing a recently used local address
2753 (this is allowed by default for a server process).
2754 :bindtodevice NAME -- bind to interface NAME. Using this may require
2755 special privileges on some systems.
2757 Consult the relevant system programmer's manual pages for more
2758 information on using these options.
2761 A server process will listen for and accept connections from clients.
2762 When a client connection is accepted, a new network process is created
2763 for the connection with the following parameters:
2765 - The client's process name is constructed by concatenating the server
2766 process' NAME and a client identification string.
2767 - If the FILTER argument is non-nil, the client process will not get a
2768 separate process buffer; otherwise, the client's process buffer is a newly
2769 created buffer named after the server process' BUFFER name or process
2770 NAME concatenated with the client identification string.
2771 - The connection type and the process filter and sentinel parameters are
2772 inherited from the server process' TYPE, FILTER and SENTINEL.
2773 - The client process' contact info is set according to the client's
2774 addressing information (typically an IP address and a port number).
2775 - The client process' plist is initialized from the server's plist.
2777 Notice that the FILTER and SENTINEL args are never used directly by
2778 the server process. Also, the BUFFER argument is not used directly by
2779 the server process, but via the optional :log function, accepted (and
2780 failed) connections may be logged in the server process' buffer.
2782 The original argument list, modified with the actual connection
2783 information, is available via the `process-contact' function.
2785 usage: (make-network-process &rest ARGS) */)
2786 (ptrdiff_t nargs
, Lisp_Object
*args
)
2789 Lisp_Object contact
;
2790 struct Lisp_Process
*p
;
2791 #ifdef HAVE_GETADDRINFO
2792 struct addrinfo ai
, *res
, *lres
;
2793 struct addrinfo hints
;
2794 const char *portstring
;
2796 #else /* HAVE_GETADDRINFO */
2797 struct _emacs_addrinfo
2803 struct sockaddr
*ai_addr
;
2804 struct _emacs_addrinfo
*ai_next
;
2806 #endif /* HAVE_GETADDRINFO */
2807 struct sockaddr_in address_in
;
2808 #ifdef HAVE_LOCAL_SOCKETS
2809 struct sockaddr_un address_un
;
2814 int s
= -1, outch
, inch
;
2815 struct gcpro gcpro1
;
2816 ptrdiff_t count
= SPECPDL_INDEX ();
2818 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2820 Lisp_Object name
, buffer
, host
, service
, address
;
2821 Lisp_Object filter
, sentinel
;
2822 int is_non_blocking_client
= 0;
2823 int is_server
= 0, backlog
= 5;
2830 /* Save arguments for process-contact and clone-process. */
2831 contact
= Flist (nargs
, args
);
2835 /* Ensure socket support is loaded if available. */
2836 init_winsock (TRUE
);
2839 /* :type TYPE (nil: stream, datagram */
2840 tem
= Fplist_get (contact
, QCtype
);
2842 socktype
= SOCK_STREAM
;
2843 #ifdef DATAGRAM_SOCKETS
2844 else if (EQ (tem
, Qdatagram
))
2845 socktype
= SOCK_DGRAM
;
2847 #ifdef HAVE_SEQPACKET
2848 else if (EQ (tem
, Qseqpacket
))
2849 socktype
= SOCK_SEQPACKET
;
2852 error ("Unsupported connection type");
2855 tem
= Fplist_get (contact
, QCserver
);
2858 /* Don't support network sockets when non-blocking mode is
2859 not available, since a blocked Emacs is not useful. */
2861 if (TYPE_RANGED_INTEGERP (int, tem
))
2862 backlog
= XINT (tem
);
2865 /* Make QCaddress an alias for :local (server) or :remote (client). */
2866 QCaddress
= is_server
? QClocal
: QCremote
;
2869 if (!is_server
&& socktype
!= SOCK_DGRAM
2870 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2872 #ifndef NON_BLOCKING_CONNECT
2873 error ("Non-blocking connect not supported");
2875 is_non_blocking_client
= 1;
2879 name
= Fplist_get (contact
, QCname
);
2880 buffer
= Fplist_get (contact
, QCbuffer
);
2881 filter
= Fplist_get (contact
, QCfilter
);
2882 sentinel
= Fplist_get (contact
, QCsentinel
);
2884 CHECK_STRING (name
);
2886 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2887 ai
.ai_socktype
= socktype
;
2892 /* :local ADDRESS or :remote ADDRESS */
2893 address
= Fplist_get (contact
, QCaddress
);
2894 if (!NILP (address
))
2896 host
= service
= Qnil
;
2898 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2899 error ("Malformed :address");
2900 ai
.ai_family
= family
;
2901 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2902 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2906 /* :family FAMILY -- nil (for Inet), local, or integer. */
2907 tem
= Fplist_get (contact
, QCfamily
);
2910 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2916 #ifdef HAVE_LOCAL_SOCKETS
2917 else if (EQ (tem
, Qlocal
))
2921 else if (EQ (tem
, Qipv6
))
2924 else if (EQ (tem
, Qipv4
))
2926 else if (TYPE_RANGED_INTEGERP (int, tem
))
2927 family
= XINT (tem
);
2929 error ("Unknown address family");
2931 ai
.ai_family
= family
;
2933 /* :service SERVICE -- string, integer (port number), or t (random port). */
2934 service
= Fplist_get (contact
, QCservice
);
2936 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2937 host
= Fplist_get (contact
, QChost
);
2940 if (EQ (host
, Qlocal
))
2941 /* Depending on setup, "localhost" may map to different IPv4 and/or
2942 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
2943 host
= build_string ("127.0.0.1");
2944 CHECK_STRING (host
);
2947 #ifdef HAVE_LOCAL_SOCKETS
2948 if (family
== AF_LOCAL
)
2952 message (":family local ignores the :host \"%s\" property",
2954 contact
= Fplist_put (contact
, QChost
, Qnil
);
2957 CHECK_STRING (service
);
2958 memset (&address_un
, 0, sizeof address_un
);
2959 address_un
.sun_family
= AF_LOCAL
;
2960 if (sizeof address_un
.sun_path
<= SBYTES (service
))
2961 error ("Service name too long");
2962 strcpy (address_un
.sun_path
, SSDATA (service
));
2963 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2964 ai
.ai_addrlen
= sizeof address_un
;
2969 /* Slow down polling to every ten seconds.
2970 Some kernels have a bug which causes retrying connect to fail
2971 after a connect. Polling can interfere with gethostbyname too. */
2972 #ifdef POLL_FOR_INPUT
2973 if (socktype
!= SOCK_DGRAM
)
2975 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2976 bind_polling_period (10);
2980 #ifdef HAVE_GETADDRINFO
2981 /* If we have a host, use getaddrinfo to resolve both host and service.
2982 Otherwise, use getservbyname to lookup the service. */
2986 /* SERVICE can either be a string or int.
2987 Convert to a C string for later use by getaddrinfo. */
2988 if (EQ (service
, Qt
))
2990 else if (INTEGERP (service
))
2992 sprintf (portbuf
, "%"pI
"d", XINT (service
));
2993 portstring
= portbuf
;
2997 CHECK_STRING (service
);
2998 portstring
= SSDATA (service
);
3003 memset (&hints
, 0, sizeof (hints
));
3005 hints
.ai_family
= family
;
3006 hints
.ai_socktype
= socktype
;
3007 hints
.ai_protocol
= 0;
3009 #ifdef HAVE_RES_INIT
3013 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3015 #ifdef HAVE_GAI_STRERROR
3016 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3018 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3024 #endif /* HAVE_GETADDRINFO */
3026 /* We end up here if getaddrinfo is not defined, or in case no hostname
3027 has been specified (e.g. for a local server process). */
3029 if (EQ (service
, Qt
))
3031 else if (INTEGERP (service
))
3032 port
= htons ((unsigned short) XINT (service
));
3035 struct servent
*svc_info
;
3036 CHECK_STRING (service
);
3037 svc_info
= getservbyname (SSDATA (service
),
3038 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3040 error ("Unknown service: %s", SDATA (service
));
3041 port
= svc_info
->s_port
;
3044 memset (&address_in
, 0, sizeof address_in
);
3045 address_in
.sin_family
= family
;
3046 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3047 address_in
.sin_port
= port
;
3049 #ifndef HAVE_GETADDRINFO
3052 struct hostent
*host_info_ptr
;
3054 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3055 as it may `hang' Emacs for a very long time. */
3059 #ifdef HAVE_RES_INIT
3063 host_info_ptr
= gethostbyname (SDATA (host
));
3068 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3069 host_info_ptr
->h_length
);
3070 family
= host_info_ptr
->h_addrtype
;
3071 address_in
.sin_family
= family
;
3074 /* Attempt to interpret host as numeric inet address */
3076 unsigned long numeric_addr
;
3077 numeric_addr
= inet_addr (SSDATA (host
));
3078 if (numeric_addr
== -1)
3079 error ("Unknown host \"%s\"", SDATA (host
));
3081 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3082 sizeof (address_in
.sin_addr
));
3086 #endif /* not HAVE_GETADDRINFO */
3088 ai
.ai_family
= family
;
3089 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3090 ai
.ai_addrlen
= sizeof address_in
;
3094 /* Do this in case we never enter the for-loop below. */
3095 count1
= SPECPDL_INDEX ();
3098 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3107 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3114 #ifdef DATAGRAM_SOCKETS
3115 if (!is_server
&& socktype
== SOCK_DGRAM
)
3117 #endif /* DATAGRAM_SOCKETS */
3119 #ifdef NON_BLOCKING_CONNECT
3120 if (is_non_blocking_client
)
3122 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3133 /* Make us close S if quit. */
3134 record_unwind_protect (close_file_unwind
, make_number (s
));
3136 /* Parse network options in the arg list.
3137 We simply ignore anything which isn't a known option (including other keywords).
3138 An error is signaled if setting a known option fails. */
3139 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3140 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3144 /* Configure as a server socket. */
3146 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3147 explicit :reuseaddr key to override this. */
3148 #ifdef HAVE_LOCAL_SOCKETS
3149 if (family
!= AF_LOCAL
)
3151 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3154 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3155 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3158 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3159 report_file_error ("Cannot bind server socket", Qnil
);
3161 #ifdef HAVE_GETSOCKNAME
3162 if (EQ (service
, Qt
))
3164 struct sockaddr_in sa1
;
3165 socklen_t len1
= sizeof (sa1
);
3166 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3168 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3169 service
= make_number (ntohs (sa1
.sin_port
));
3170 contact
= Fplist_put (contact
, QCservice
, service
);
3175 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3176 report_file_error ("Cannot listen on server socket", Qnil
);
3184 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3187 if (ret
== 0 || xerrno
== EISCONN
)
3189 /* The unwind-protect will be discarded afterwards.
3190 Likewise for immediate_quit. */
3194 #ifdef NON_BLOCKING_CONNECT
3196 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3200 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3207 if (xerrno
== EINTR
)
3209 /* Unlike most other syscalls connect() cannot be called
3210 again. (That would return EALREADY.) The proper way to
3211 wait for completion is pselect(). */
3219 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3225 report_file_error ("select failed", Qnil
);
3229 len
= sizeof xerrno
;
3230 eassert (FD_ISSET (s
, &fdset
));
3231 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3232 report_file_error ("getsockopt failed", Qnil
);
3234 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3238 #endif /* !WINDOWSNT */
3242 /* Discard the unwind protect closing S. */
3243 specpdl_ptr
= specpdl
+ count1
;
3248 if (xerrno
== EINTR
)
3255 #ifdef DATAGRAM_SOCKETS
3256 if (socktype
== SOCK_DGRAM
)
3258 if (datagram_address
[s
].sa
)
3260 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3261 datagram_address
[s
].len
= lres
->ai_addrlen
;
3265 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3266 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3269 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3270 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3271 conv_lisp_to_sockaddr (rfamily
, remote
,
3272 datagram_address
[s
].sa
, rlen
);
3276 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3279 contact
= Fplist_put (contact
, QCaddress
,
3280 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3281 #ifdef HAVE_GETSOCKNAME
3284 struct sockaddr_in sa1
;
3285 socklen_t len1
= sizeof (sa1
);
3286 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3287 contact
= Fplist_put (contact
, QClocal
,
3288 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3295 #ifdef HAVE_GETADDRINFO
3304 /* Discard the unwind protect for closing S, if any. */
3305 specpdl_ptr
= specpdl
+ count1
;
3307 /* Unwind bind_polling_period and request_sigio. */
3308 unbind_to (count
, Qnil
);
3312 /* If non-blocking got this far - and failed - assume non-blocking is
3313 not supported after all. This is probably a wrong assumption, but
3314 the normal blocking calls to open-network-stream handles this error
3316 if (is_non_blocking_client
)
3321 report_file_error ("make server process failed", contact
);
3323 report_file_error ("make client process failed", contact
);
3330 buffer
= Fget_buffer_create (buffer
);
3331 proc
= make_process (name
);
3333 chan_process
[inch
] = proc
;
3335 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3337 p
= XPROCESS (proc
);
3339 pset_childp (p
, contact
);
3340 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3341 pset_type (p
, Qnetwork
);
3343 pset_buffer (p
, buffer
);
3344 pset_sentinel (p
, sentinel
);
3345 pset_filter (p
, filter
);
3346 pset_log (p
, Fplist_get (contact
, QClog
));
3347 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3348 p
->kill_without_query
= 1;
3349 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3350 pset_command (p
, Qt
);
3354 if (is_server
&& socktype
!= SOCK_DGRAM
)
3355 pset_status (p
, Qlisten
);
3357 /* Make the process marker point into the process buffer (if any). */
3358 if (BUFFERP (buffer
))
3359 set_marker_both (p
->mark
, buffer
,
3360 BUF_ZV (XBUFFER (buffer
)),
3361 BUF_ZV_BYTE (XBUFFER (buffer
)));
3363 #ifdef NON_BLOCKING_CONNECT
3364 if (is_non_blocking_client
)
3366 /* We may get here if connect did succeed immediately. However,
3367 in that case, we still need to signal this like a non-blocking
3369 pset_status (p
, Qconnect
);
3370 if (!FD_ISSET (inch
, &connect_wait_mask
))
3372 FD_SET (inch
, &connect_wait_mask
);
3373 FD_SET (inch
, &write_mask
);
3374 num_pending_connects
++;
3379 /* A server may have a client filter setting of Qt, but it must
3380 still listen for incoming connects unless it is stopped. */
3381 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3382 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3384 FD_SET (inch
, &input_wait_mask
);
3385 FD_SET (inch
, &non_keyboard_wait_mask
);
3388 if (inch
> max_process_desc
)
3389 max_process_desc
= inch
;
3391 tem
= Fplist_member (contact
, QCcoding
);
3392 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3393 tem
= Qnil
; /* No error message (too late!). */
3396 /* Setup coding systems for communicating with the network stream. */
3397 struct gcpro gcpro1
;
3398 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3399 Lisp_Object coding_systems
= Qt
;
3400 Lisp_Object fargs
[5], val
;
3404 val
= XCAR (XCDR (tem
));
3408 else if (!NILP (Vcoding_system_for_read
))
3409 val
= Vcoding_system_for_read
;
3410 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3411 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3412 /* We dare not decode end-of-line format by setting VAL to
3413 Qraw_text, because the existing Emacs Lisp libraries
3414 assume that they receive bare code including a sequence of
3419 if (NILP (host
) || NILP (service
))
3420 coding_systems
= Qnil
;
3423 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3424 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3426 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3429 if (CONSP (coding_systems
))
3430 val
= XCAR (coding_systems
);
3431 else if (CONSP (Vdefault_process_coding_system
))
3432 val
= XCAR (Vdefault_process_coding_system
);
3436 pset_decode_coding_system (p
, val
);
3440 val
= XCAR (XCDR (tem
));
3444 else if (!NILP (Vcoding_system_for_write
))
3445 val
= Vcoding_system_for_write
;
3446 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3450 if (EQ (coding_systems
, Qt
))
3452 if (NILP (host
) || NILP (service
))
3453 coding_systems
= Qnil
;
3456 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3457 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3459 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3463 if (CONSP (coding_systems
))
3464 val
= XCDR (coding_systems
);
3465 else if (CONSP (Vdefault_process_coding_system
))
3466 val
= XCDR (Vdefault_process_coding_system
);
3470 pset_encode_coding_system (p
, val
);
3472 setup_process_coding_systems (proc
);
3474 pset_decoding_buf (p
, empty_unibyte_string
);
3475 p
->decoding_carryover
= 0;
3476 pset_encoding_buf (p
, empty_unibyte_string
);
3478 p
->inherit_coding_system_flag
3479 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3486 #if defined (HAVE_NET_IF_H)
3489 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3490 doc
: /* Return an alist of all network interfaces and their network address.
3491 Each element is a cons, the car of which is a string containing the
3492 interface name, and the cdr is the network address in internal
3493 format; see the description of ADDRESS in `make-network-process'. */)
3496 struct ifconf ifconf
;
3497 struct ifreq
*ifreq
;
3499 ptrdiff_t buf_size
= 512;
3503 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3509 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3510 ifconf
.ifc_buf
= buf
;
3511 ifconf
.ifc_len
= buf_size
;
3512 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3519 while (ifconf
.ifc_len
== buf_size
);
3524 ifreq
= ifconf
.ifc_req
;
3525 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3527 struct ifreq
*ifq
= ifreq
;
3528 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3529 #define SIZEOF_IFREQ(sif) \
3530 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3531 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3533 int len
= SIZEOF_IFREQ (ifq
);
3535 int len
= sizeof (*ifreq
);
3537 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3539 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3541 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3544 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3545 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3546 res
= Fcons (Fcons (build_string (namebuf
),
3547 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3548 sizeof (struct sockaddr
))),
3555 #endif /* SIOCGIFCONF */
3557 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3561 const char *flag_sym
;
3564 static const struct ifflag_def ifflag_table
[] = {
3568 #ifdef IFF_BROADCAST
3569 { IFF_BROADCAST
, "broadcast" },
3572 { IFF_DEBUG
, "debug" },
3575 { IFF_LOOPBACK
, "loopback" },
3577 #ifdef IFF_POINTOPOINT
3578 { IFF_POINTOPOINT
, "pointopoint" },
3581 { IFF_RUNNING
, "running" },
3584 { IFF_NOARP
, "noarp" },
3587 { IFF_PROMISC
, "promisc" },
3589 #ifdef IFF_NOTRAILERS
3590 #ifdef NS_IMPL_COCOA
3591 /* Really means smart, notrailers is obsolete */
3592 { IFF_NOTRAILERS
, "smart" },
3594 { IFF_NOTRAILERS
, "notrailers" },
3598 { IFF_ALLMULTI
, "allmulti" },
3601 { IFF_MASTER
, "master" },
3604 { IFF_SLAVE
, "slave" },
3606 #ifdef IFF_MULTICAST
3607 { IFF_MULTICAST
, "multicast" },
3610 { IFF_PORTSEL
, "portsel" },
3612 #ifdef IFF_AUTOMEDIA
3613 { IFF_AUTOMEDIA
, "automedia" },
3616 { IFF_DYNAMIC
, "dynamic" },
3619 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3622 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3625 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3628 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3631 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3636 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3637 doc
: /* Return information about network interface named IFNAME.
3638 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3639 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3640 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3641 FLAGS is the current flags of the interface. */)
3642 (Lisp_Object ifname
)
3645 Lisp_Object res
= Qnil
;
3649 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3650 && defined HAVE_GETIFADDRS && defined LLADDR)
3651 struct ifaddrs
*ifap
;
3654 CHECK_STRING (ifname
);
3656 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3657 error ("interface name too long");
3658 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3660 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3665 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3666 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3668 int flags
= rq
.ifr_flags
;
3669 const struct ifflag_def
*fp
;
3672 /* If flags is smaller than int (i.e. short) it may have the high bit set
3673 due to IFF_MULTICAST. In that case, sign extending it into
3675 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3676 flags
= (unsigned short) rq
.ifr_flags
;
3679 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3681 if (flags
& fp
->flag_bit
)
3683 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3684 flags
-= fp
->flag_bit
;
3687 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3691 elt
= Fcons (make_number (fnum
), elt
);
3696 res
= Fcons (elt
, res
);
3699 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3700 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3702 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3703 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3707 for (n
= 0; n
< 6; n
++)
3708 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3709 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3711 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3712 if (getifaddrs (&ifap
) != -1)
3714 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3715 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3718 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3720 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3721 unsigned char linkaddr
[6];
3724 if (it
->ifa_addr
->sa_family
!= AF_LINK
3725 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3726 || sdl
->sdl_alen
!= 6)
3729 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3730 for (n
= 0; n
< 6; n
++)
3731 p
->contents
[n
] = make_number (linkaddr
[n
]);
3733 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3737 #ifdef HAVE_FREEIFADDRS
3741 #endif /* HAVE_GETIFADDRS && LLADDR */
3743 res
= Fcons (elt
, res
);
3746 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3747 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3750 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3751 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3753 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3757 res
= Fcons (elt
, res
);
3760 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3761 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3764 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3767 res
= Fcons (elt
, res
);
3770 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3771 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3774 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3777 res
= Fcons (elt
, res
);
3781 return any
? res
: Qnil
;
3784 #endif /* defined (HAVE_NET_IF_H) */
3786 /* Turn off input and output for process PROC. */
3789 deactivate_process (Lisp_Object proc
)
3791 register int inchannel
, outchannel
;
3792 register struct Lisp_Process
*p
= XPROCESS (proc
);
3795 /* Delete GnuTLS structures in PROC, if any. */
3796 emacs_gnutls_deinit (proc
);
3797 #endif /* HAVE_GNUTLS */
3799 inchannel
= p
->infd
;
3800 outchannel
= p
->outfd
;
3802 #ifdef ADAPTIVE_READ_BUFFERING
3803 if (p
->read_output_delay
> 0)
3805 if (--process_output_delay_count
< 0)
3806 process_output_delay_count
= 0;
3807 p
->read_output_delay
= 0;
3808 p
->read_output_skip
= 0;
3814 /* Beware SIGCHLD hereabouts. */
3815 flush_pending_output (inchannel
);
3816 emacs_close (inchannel
);
3817 if (outchannel
>= 0 && outchannel
!= inchannel
)
3818 emacs_close (outchannel
);
3822 #ifdef DATAGRAM_SOCKETS
3823 if (DATAGRAM_CHAN_P (inchannel
))
3825 xfree (datagram_address
[inchannel
].sa
);
3826 datagram_address
[inchannel
].sa
= 0;
3827 datagram_address
[inchannel
].len
= 0;
3830 chan_process
[inchannel
] = Qnil
;
3831 FD_CLR (inchannel
, &input_wait_mask
);
3832 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3833 #ifdef NON_BLOCKING_CONNECT
3834 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3836 FD_CLR (inchannel
, &connect_wait_mask
);
3837 FD_CLR (inchannel
, &write_mask
);
3838 if (--num_pending_connects
< 0)
3842 if (inchannel
== max_process_desc
)
3845 /* We just closed the highest-numbered process input descriptor,
3846 so recompute the highest-numbered one now. */
3847 max_process_desc
= 0;
3848 for (i
= 0; i
< MAXDESC
; i
++)
3849 if (!NILP (chan_process
[i
]))
3850 max_process_desc
= i
;
3856 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3858 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3859 It is read into the process' buffers or given to their filter functions.
3860 Non-nil arg PROCESS means do not return until some output has been received
3863 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3864 and milliseconds to wait; return after that much time whether or not
3865 there is any subprocess output. If SECONDS is a floating point number,
3866 it specifies a fractional number of seconds to wait.
3867 The MILLISEC argument is obsolete and should be avoided.
3869 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3870 from PROCESS, suspending reading output from other processes.
3871 If JUST-THIS-ONE is an integer, don't run any timers either.
3872 Return non-nil if we received any output before the timeout expired. */)
3873 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3878 if (! NILP (process
))
3879 CHECK_PROCESS (process
);
3881 just_this_one
= Qnil
;
3883 if (!NILP (millisec
))
3884 { /* Obsolete calling convention using integers rather than floats. */
3885 CHECK_NUMBER (millisec
);
3887 seconds
= make_float (XINT (millisec
) / 1000.0);
3890 CHECK_NUMBER (seconds
);
3891 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3898 if (!NILP (seconds
))
3900 if (INTEGERP (seconds
))
3902 if (0 < XINT (seconds
))
3904 secs
= XINT (seconds
);
3908 else if (FLOATP (seconds
))
3910 if (0 < XFLOAT_DATA (seconds
))
3912 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
3913 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
3914 nsecs
= EMACS_NSECS (t
);
3918 wrong_type_argument (Qnumberp
, seconds
);
3920 else if (! NILP (process
))
3924 (wait_reading_process_output (secs
, nsecs
, 0, 0,
3926 !NILP (process
) ? XPROCESS (process
) : NULL
,
3927 NILP (just_this_one
) ? 0 :
3928 !INTEGERP (just_this_one
) ? 1 : -1)
3932 /* Accept a connection for server process SERVER on CHANNEL. */
3934 static int connect_counter
= 0;
3937 server_accept_connection (Lisp_Object server
, int channel
)
3939 Lisp_Object proc
, caller
, name
, buffer
;
3940 Lisp_Object contact
, host
, service
;
3941 struct Lisp_Process
*ps
= XPROCESS (server
);
3942 struct Lisp_Process
*p
;
3946 struct sockaddr_in in
;
3948 struct sockaddr_in6 in6
;
3950 #ifdef HAVE_LOCAL_SOCKETS
3951 struct sockaddr_un un
;
3954 socklen_t len
= sizeof saddr
;
3956 s
= accept (channel
, &saddr
.sa
, &len
);
3965 if (code
== EWOULDBLOCK
)
3969 if (!NILP (ps
->log
))
3970 call3 (ps
->log
, server
, Qnil
,
3971 concat3 (build_string ("accept failed with code"),
3972 Fnumber_to_string (make_number (code
)),
3973 build_string ("\n")));
3979 /* Setup a new process to handle the connection. */
3981 /* Generate a unique identification of the caller, and build contact
3982 information for this process. */
3985 switch (saddr
.sa
.sa_family
)
3989 Lisp_Object args
[5];
3990 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3991 args
[0] = build_string ("%d.%d.%d.%d");
3992 args
[1] = make_number (*ip
++);
3993 args
[2] = make_number (*ip
++);
3994 args
[3] = make_number (*ip
++);
3995 args
[4] = make_number (*ip
++);
3996 host
= Fformat (5, args
);
3997 service
= make_number (ntohs (saddr
.in
.sin_port
));
3999 args
[0] = build_string (" <%s:%d>");
4002 caller
= Fformat (3, args
);
4009 Lisp_Object args
[9];
4010 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4012 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4013 for (i
= 0; i
< 8; i
++)
4014 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4015 host
= Fformat (9, args
);
4016 service
= make_number (ntohs (saddr
.in
.sin_port
));
4018 args
[0] = build_string (" <[%s]:%d>");
4021 caller
= Fformat (3, args
);
4026 #ifdef HAVE_LOCAL_SOCKETS
4030 caller
= Fnumber_to_string (make_number (connect_counter
));
4031 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4035 /* Create a new buffer name for this process if it doesn't have a
4036 filter. The new buffer name is based on the buffer name or
4037 process name of the server process concatenated with the caller
4040 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4044 buffer
= ps
->buffer
;
4046 buffer
= Fbuffer_name (buffer
);
4051 buffer
= concat2 (buffer
, caller
);
4052 buffer
= Fget_buffer_create (buffer
);
4056 /* Generate a unique name for the new server process. Combine the
4057 server process name with the caller identification. */
4059 name
= concat2 (ps
->name
, caller
);
4060 proc
= make_process (name
);
4062 chan_process
[s
] = proc
;
4064 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4066 p
= XPROCESS (proc
);
4068 /* Build new contact information for this setup. */
4069 contact
= Fcopy_sequence (ps
->childp
);
4070 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4071 contact
= Fplist_put (contact
, QChost
, host
);
4072 if (!NILP (service
))
4073 contact
= Fplist_put (contact
, QCservice
, service
);
4074 contact
= Fplist_put (contact
, QCremote
,
4075 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4076 #ifdef HAVE_GETSOCKNAME
4078 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4079 contact
= Fplist_put (contact
, QClocal
,
4080 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4083 pset_childp (p
, contact
);
4084 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4085 pset_type (p
, Qnetwork
);
4087 pset_buffer (p
, buffer
);
4088 pset_sentinel (p
, ps
->sentinel
);
4089 pset_filter (p
, ps
->filter
);
4090 pset_command (p
, Qnil
);
4094 pset_status (p
, Qrun
);
4096 /* Client processes for accepted connections are not stopped initially. */
4097 if (!EQ (p
->filter
, Qt
))
4099 FD_SET (s
, &input_wait_mask
);
4100 FD_SET (s
, &non_keyboard_wait_mask
);
4103 if (s
> max_process_desc
)
4104 max_process_desc
= s
;
4106 /* Setup coding system for new process based on server process.
4107 This seems to be the proper thing to do, as the coding system
4108 of the new process should reflect the settings at the time the
4109 server socket was opened; not the current settings. */
4111 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4112 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4113 setup_process_coding_systems (proc
);
4115 pset_decoding_buf (p
, empty_unibyte_string
);
4116 p
->decoding_carryover
= 0;
4117 pset_encoding_buf (p
, empty_unibyte_string
);
4119 p
->inherit_coding_system_flag
4120 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4122 if (!NILP (ps
->log
))
4123 call3 (ps
->log
, server
, proc
,
4124 concat3 (build_string ("accept from "),
4125 (STRINGP (host
) ? host
: build_string ("-")),
4126 build_string ("\n")));
4128 if (!NILP (p
->sentinel
))
4129 exec_sentinel (proc
,
4130 concat3 (build_string ("open from "),
4131 (STRINGP (host
) ? host
: build_string ("-")),
4132 build_string ("\n")));
4135 /* This variable is different from waiting_for_input in keyboard.c.
4136 It is used to communicate to a lisp process-filter/sentinel (via the
4137 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4138 for user-input when that process-filter was called.
4139 waiting_for_input cannot be used as that is by definition 0 when
4140 lisp code is being evalled.
4141 This is also used in record_asynch_buffer_change.
4142 For that purpose, this must be 0
4143 when not inside wait_reading_process_output. */
4144 static int waiting_for_user_input_p
;
4147 wait_reading_process_output_unwind (Lisp_Object data
)
4149 waiting_for_user_input_p
= XINT (data
);
4153 /* This is here so breakpoints can be put on it. */
4155 wait_reading_process_output_1 (void)
4159 /* Read and dispose of subprocess output while waiting for timeout to
4160 elapse and/or keyboard input to be available.
4164 If negative, gobble data immediately available but don't wait for any.
4167 an additional duration to wait, measured in nanoseconds
4168 If TIME_LIMIT is zero, then:
4169 If NSECS == 0, there is no limit.
4170 If NSECS > 0, the timeout consists of NSECS only.
4171 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4174 0 to ignore keyboard input, or
4175 1 to return when input is available, or
4176 -1 meaning caller will actually read the input, so don't throw to
4177 the quit handler, or
4179 DO_DISPLAY means redisplay should be done to show subprocess
4180 output that arrives.
4182 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4183 (and gobble terminal input into the buffer if any arrives).
4185 If WAIT_PROC is specified, wait until something arrives from that
4186 process. The return value is true if we read some input from
4189 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4190 (suspending output from other processes). A negative value
4191 means don't run any timers either.
4193 If WAIT_PROC is specified, then the function returns true if we
4194 received input from that process before the timeout elapsed.
4195 Otherwise, return true if we received input from any process. */
4198 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4200 Lisp_Object wait_for_cell
,
4201 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4203 register int channel
, nfds
;
4204 SELECT_TYPE Available
;
4205 SELECT_TYPE Writeok
;
4207 int check_delay
, no_avail
;
4210 EMACS_TIME timeout
, end_time
;
4211 int wait_channel
= -1;
4212 int got_some_input
= 0;
4213 ptrdiff_t count
= SPECPDL_INDEX ();
4215 FD_ZERO (&Available
);
4218 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4219 && !(CONSP (wait_proc
->status
)
4220 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4221 message1 ("Blocking call to accept-process-output with quit inhibited!!");
4223 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4224 if (wait_proc
!= NULL
)
4225 wait_channel
= wait_proc
->infd
;
4227 record_unwind_protect (wait_reading_process_output_unwind
,
4228 make_number (waiting_for_user_input_p
));
4229 waiting_for_user_input_p
= read_kbd
;
4236 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4237 time_limit
= TYPE_MAXIMUM (time_t);
4239 /* Since we may need to wait several times,
4240 compute the absolute time to return at. */
4241 if (time_limit
|| 0 < nsecs
)
4243 timeout
= make_emacs_time (time_limit
, nsecs
);
4244 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4249 int timeout_reduced_for_timers
= 0;
4251 /* If calling from keyboard input, do not quit
4252 since we want to return C-g as an input character.
4253 Otherwise, do pending quit if requested. */
4256 else if (pending_signals
)
4257 process_pending_signals ();
4259 /* Exit now if the cell we're waiting for became non-nil. */
4260 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4263 /* Compute time from now till when time limit is up */
4264 /* Exit if already run out */
4267 /* A negative timeout means
4268 gobble output available now
4269 but don't wait at all. */
4271 timeout
= make_emacs_time (0, 0);
4273 else if (time_limit
|| 0 < nsecs
)
4275 EMACS_TIME now
= current_emacs_time ();
4276 if (EMACS_TIME_LE (end_time
, now
))
4278 timeout
= sub_emacs_time (end_time
, now
);
4282 timeout
= make_emacs_time (100000, 0);
4285 /* Normally we run timers here.
4286 But not if wait_for_cell; in those cases,
4287 the wait is supposed to be short,
4288 and those callers cannot handle running arbitrary Lisp code here. */
4289 if (NILP (wait_for_cell
)
4290 && just_wait_proc
>= 0)
4292 EMACS_TIME timer_delay
;
4296 unsigned old_timers_run
= timers_run
;
4297 struct buffer
*old_buffer
= current_buffer
;
4298 Lisp_Object old_window
= selected_window
;
4300 timer_delay
= timer_check ();
4302 /* If a timer has run, this might have changed buffers
4303 an alike. Make read_key_sequence aware of that. */
4304 if (timers_run
!= old_timers_run
4305 && (old_buffer
!= current_buffer
4306 || !EQ (old_window
, selected_window
))
4307 && waiting_for_user_input_p
== -1)
4308 record_asynch_buffer_change ();
4310 if (timers_run
!= old_timers_run
&& do_display
)
4311 /* We must retry, since a timer may have requeued itself
4312 and that could alter the time_delay. */
4313 redisplay_preserve_echo_area (9);
4317 while (!detect_input_pending ());
4319 /* If there is unread keyboard input, also return. */
4321 && requeued_events_pending_p ())
4324 /* A negative timeout means do not wait at all. */
4327 if (EMACS_TIME_VALID_P (timer_delay
))
4329 if (EMACS_TIME_LT (timer_delay
, timeout
))
4331 timeout
= timer_delay
;
4332 timeout_reduced_for_timers
= 1;
4337 /* This is so a breakpoint can be put here. */
4338 wait_reading_process_output_1 ();
4343 /* Cause C-g and alarm signals to take immediate action,
4344 and cause input available signals to zero out timeout.
4346 It is important that we do this before checking for process
4347 activity. If we get a SIGCHLD after the explicit checks for
4348 process activity, timeout is the only way we will know. */
4350 set_waiting_for_input (&timeout
);
4352 /* If status of something has changed, and no input is
4353 available, notify the user of the change right away. After
4354 this explicit check, we'll let the SIGCHLD handler zap
4355 timeout to get our attention. */
4356 if (update_tick
!= process_tick
)
4361 if (kbd_on_hold_p ())
4364 Atemp
= input_wait_mask
;
4367 timeout
= make_emacs_time (0, 0);
4368 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4370 #ifdef NON_BLOCKING_CONNECT
4371 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4375 NULL
, &timeout
, NULL
)
4378 /* It's okay for us to do this and then continue with
4379 the loop, since timeout has already been zeroed out. */
4380 clear_waiting_for_input ();
4381 status_notify (NULL
);
4382 if (do_display
) redisplay_preserve_echo_area (13);
4386 /* Don't wait for output from a non-running process. Just
4387 read whatever data has already been received. */
4388 if (wait_proc
&& wait_proc
->raw_status_new
)
4389 update_status (wait_proc
);
4391 && ! EQ (wait_proc
->status
, Qrun
)
4392 && ! EQ (wait_proc
->status
, Qconnect
))
4394 int nread
, total_nread
= 0;
4396 clear_waiting_for_input ();
4397 XSETPROCESS (proc
, wait_proc
);
4399 /* Read data from the process, until we exhaust it. */
4400 while (wait_proc
->infd
>= 0)
4402 nread
= read_process_output (proc
, wait_proc
->infd
);
4409 total_nread
+= nread
;
4412 else if (nread
== -1 && (errno
== EIO
|| errno
== EAGAIN
))
4415 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4419 if (total_nread
> 0 && do_display
)
4420 redisplay_preserve_echo_area (10);
4425 /* Wait till there is something to do */
4427 if (wait_proc
&& just_wait_proc
)
4429 if (wait_proc
->infd
< 0) /* Terminated */
4431 FD_SET (wait_proc
->infd
, &Available
);
4435 else if (!NILP (wait_for_cell
))
4437 Available
= non_process_wait_mask
;
4444 Available
= non_keyboard_wait_mask
;
4446 Available
= input_wait_mask
;
4447 Writeok
= write_mask
;
4448 #ifdef SELECT_CANT_DO_WRITE_MASK
4453 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4456 /* If frame size has changed or the window is newly mapped,
4457 redisplay now, before we start to wait. There is a race
4458 condition here; if a SIGIO arrives between now and the select
4459 and indicates that a frame is trashed, the select may block
4460 displaying a trashed screen. */
4461 if (frame_garbaged
&& do_display
)
4463 clear_waiting_for_input ();
4464 redisplay_preserve_echo_area (11);
4466 set_waiting_for_input (&timeout
);
4469 /* Skip the `select' call if input is available and we're
4470 waiting for keyboard input or a cell change (which can be
4471 triggered by processing X events). In the latter case, set
4472 nfds to 1 to avoid breaking the loop. */
4474 if ((read_kbd
|| !NILP (wait_for_cell
))
4475 && detect_input_pending ())
4477 nfds
= read_kbd
? 0 : 1;
4484 #ifdef ADAPTIVE_READ_BUFFERING
4485 /* Set the timeout for adaptive read buffering if any
4486 process has non-zero read_output_skip and non-zero
4487 read_output_delay, and we are not reading output for a
4488 specific wait_channel. It is not executed if
4489 Vprocess_adaptive_read_buffering is nil. */
4490 if (process_output_skip
&& check_delay
> 0)
4492 int nsecs
= EMACS_NSECS (timeout
);
4493 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4494 nsecs
= READ_OUTPUT_DELAY_MAX
;
4495 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4497 proc
= chan_process
[channel
];
4500 /* Find minimum non-zero read_output_delay among the
4501 processes with non-zero read_output_skip. */
4502 if (XPROCESS (proc
)->read_output_delay
> 0)
4505 if (!XPROCESS (proc
)->read_output_skip
)
4507 FD_CLR (channel
, &Available
);
4508 XPROCESS (proc
)->read_output_skip
= 0;
4509 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4510 nsecs
= XPROCESS (proc
)->read_output_delay
;
4513 timeout
= make_emacs_time (0, nsecs
);
4514 process_output_skip
= 0;
4518 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4520 #elif defined (HAVE_NS)
4525 (max (max_process_desc
, max_input_desc
) + 1,
4527 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4528 NULL
, &timeout
, NULL
);
4531 /* GnuTLS buffers data internally. In lowat mode it leaves
4532 some data in the TCP buffers so that select works, but
4533 with custom pull/push functions we need to check if some
4534 data is available in the buffers manually. */
4539 /* We're not waiting on a specific process, so loop
4540 through all the channels and check for data.
4541 This is a workaround needed for some versions of
4542 the gnutls library -- 2.12.14 has been confirmed
4544 http://comments.gmane.org/gmane.emacs.devel/145074 */
4545 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4546 if (! NILP (chan_process
[channel
]))
4548 struct Lisp_Process
*p
=
4549 XPROCESS (chan_process
[channel
]);
4550 if (p
&& p
->gnutls_p
&& p
->infd
4551 && ((emacs_gnutls_record_check_pending
4556 FD_SET (p
->infd
, &Available
);
4562 /* Check this specific channel. */
4563 if (wait_proc
->gnutls_p
/* Check for valid process. */
4564 /* Do we have pending data? */
4565 && ((emacs_gnutls_record_check_pending
4566 (wait_proc
->gnutls_state
))
4570 /* Set to Available. */
4571 FD_SET (wait_proc
->infd
, &Available
);
4580 /* Make C-g and alarm signals set flags again */
4581 clear_waiting_for_input ();
4583 /* If we woke up due to SIGWINCH, actually change size now. */
4584 do_pending_window_change (0);
4586 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4587 /* We waited the full specified time, so return now. */
4591 if (xerrno
== EINTR
)
4593 else if (xerrno
== EBADF
)
4596 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4597 the child's closure of the pts gives the parent a SIGHUP, and
4598 the ptc file descriptor is automatically closed,
4599 yielding EBADF here or at select() call above.
4600 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4601 in m/ibmrt-aix.h), and here we just ignore the select error.
4602 Cleanup occurs c/o status_notify after SIGCHLD. */
4603 no_avail
= 1; /* Cannot depend on values returned */
4609 error ("select error: %s", emacs_strerror (xerrno
));
4614 FD_ZERO (&Available
);
4618 /* Check for keyboard input */
4619 /* If there is any, return immediately
4620 to give it higher priority than subprocesses */
4624 unsigned old_timers_run
= timers_run
;
4625 struct buffer
*old_buffer
= current_buffer
;
4626 Lisp_Object old_window
= selected_window
;
4629 if (detect_input_pending_run_timers (do_display
))
4631 swallow_events (do_display
);
4632 if (detect_input_pending_run_timers (do_display
))
4636 /* If a timer has run, this might have changed buffers
4637 an alike. Make read_key_sequence aware of that. */
4638 if (timers_run
!= old_timers_run
4639 && waiting_for_user_input_p
== -1
4640 && (old_buffer
!= current_buffer
4641 || !EQ (old_window
, selected_window
)))
4642 record_asynch_buffer_change ();
4648 /* If there is unread keyboard input, also return. */
4650 && requeued_events_pending_p ())
4653 /* If we are not checking for keyboard input now,
4654 do process events (but don't run any timers).
4655 This is so that X events will be processed.
4656 Otherwise they may have to wait until polling takes place.
4657 That would causes delays in pasting selections, for example.
4659 (We used to do this only if wait_for_cell.) */
4660 if (read_kbd
== 0 && detect_input_pending ())
4662 swallow_events (do_display
);
4663 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4664 if (detect_input_pending ())
4669 /* Exit now if the cell we're waiting for became non-nil. */
4670 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4674 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4675 go read it. This can happen with X on BSD after logging out.
4676 In that case, there really is no input and no SIGIO,
4677 but select says there is input. */
4679 if (read_kbd
&& interrupt_input
4680 && keyboard_bit_set (&Available
) && ! noninteractive
)
4681 handle_input_available_signal (SIGIO
);
4685 got_some_input
|= nfds
> 0;
4687 /* If checking input just got us a size-change event from X,
4688 obey it now if we should. */
4689 if (read_kbd
|| ! NILP (wait_for_cell
))
4690 do_pending_window_change (0);
4692 /* Check for data from a process. */
4693 if (no_avail
|| nfds
== 0)
4696 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4698 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4700 && ((d
->condition
& FOR_READ
4701 && FD_ISSET (channel
, &Available
))
4702 || (d
->condition
& FOR_WRITE
4703 && FD_ISSET (channel
, &write_mask
))))
4704 d
->func (channel
, d
->data
);
4707 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4709 if (FD_ISSET (channel
, &Available
)
4710 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4711 && !FD_ISSET (channel
, &non_process_wait_mask
))
4715 /* If waiting for this channel, arrange to return as
4716 soon as no more input to be processed. No more
4718 if (wait_channel
== channel
)
4724 proc
= chan_process
[channel
];
4728 /* If this is a server stream socket, accept connection. */
4729 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4731 server_accept_connection (proc
, channel
);
4735 /* Read data from the process, starting with our
4736 buffered-ahead character if we have one. */
4738 nread
= read_process_output (proc
, channel
);
4741 /* Since read_process_output can run a filter,
4742 which can call accept-process-output,
4743 don't try to read from any other processes
4744 before doing the select again. */
4745 FD_ZERO (&Available
);
4748 redisplay_preserve_echo_area (12);
4751 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4754 else if (nread
== -1 && errno
== EAGAIN
)
4757 /* FIXME: Is this special case still needed? */
4758 /* Note that we cannot distinguish between no input
4759 available now and a closed pipe.
4760 With luck, a closed pipe will be accompanied by
4761 subprocess termination and SIGCHLD. */
4762 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4766 /* On some OSs with ptys, when the process on one end of
4767 a pty exits, the other end gets an error reading with
4768 errno = EIO instead of getting an EOF (0 bytes read).
4769 Therefore, if we get an error reading and errno =
4770 EIO, just continue, because the child process has
4771 exited and should clean itself up soon (e.g. when we
4773 else if (nread
== -1 && errno
== EIO
)
4775 struct Lisp_Process
*p
= XPROCESS (proc
);
4777 /* Clear the descriptor now, so we only raise the
4779 FD_CLR (channel
, &input_wait_mask
);
4780 FD_CLR (channel
, &non_keyboard_wait_mask
);
4784 /* If the EIO occurs on a pty, the SIGCHLD handler's
4785 waitpid call will not find the process object to
4786 delete. Do it here. */
4787 p
->tick
= ++process_tick
;
4788 pset_status (p
, Qfailed
);
4791 #endif /* HAVE_PTYS */
4792 /* If we can detect process termination, don't consider the
4793 process gone just because its pipe is closed. */
4794 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4798 /* Preserve status of processes already terminated. */
4799 XPROCESS (proc
)->tick
= ++process_tick
;
4800 deactivate_process (proc
);
4801 if (XPROCESS (proc
)->raw_status_new
)
4802 update_status (XPROCESS (proc
));
4803 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4804 pset_status (XPROCESS (proc
),
4805 list2 (Qexit
, make_number (256)));
4808 #ifdef NON_BLOCKING_CONNECT
4809 if (FD_ISSET (channel
, &Writeok
)
4810 && FD_ISSET (channel
, &connect_wait_mask
))
4812 struct Lisp_Process
*p
;
4814 FD_CLR (channel
, &connect_wait_mask
);
4815 FD_CLR (channel
, &write_mask
);
4816 if (--num_pending_connects
< 0)
4819 proc
= chan_process
[channel
];
4823 p
= XPROCESS (proc
);
4826 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4827 So only use it on systems where it is known to work. */
4829 socklen_t xlen
= sizeof (xerrno
);
4830 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4835 struct sockaddr pname
;
4836 int pnamelen
= sizeof (pname
);
4838 /* If connection failed, getpeername will fail. */
4840 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4842 /* Obtain connect failure code through error slippage. */
4845 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4852 p
->tick
= ++process_tick
;
4853 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
4854 deactivate_process (proc
);
4858 pset_status (p
, Qrun
);
4859 /* Execute the sentinel here. If we had relied on
4860 status_notify to do it later, it will read input
4861 from the process before calling the sentinel. */
4862 exec_sentinel (proc
, build_string ("open\n"));
4863 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4865 FD_SET (p
->infd
, &input_wait_mask
);
4866 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4870 #endif /* NON_BLOCKING_CONNECT */
4871 } /* end for each file descriptor */
4872 } /* end while exit conditions not met */
4874 unbind_to (count
, Qnil
);
4876 /* If calling from keyboard input, do not quit
4877 since we want to return C-g as an input character.
4878 Otherwise, do pending quit if requested. */
4881 /* Prevent input_pending from remaining set if we quit. */
4882 clear_input_pending ();
4886 return got_some_input
;
4889 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4892 read_process_output_call (Lisp_Object fun_and_args
)
4894 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4898 read_process_output_error_handler (Lisp_Object error_val
)
4900 cmd_error_internal (error_val
, "error in process filter: ");
4902 update_echo_area ();
4903 Fsleep_for (make_number (2), Qnil
);
4907 /* Read pending output from the process channel,
4908 starting with our buffered-ahead character if we have one.
4909 Yield number of decoded characters read.
4911 This function reads at most 4096 characters.
4912 If you want to read all available subprocess output,
4913 you must call it repeatedly until it returns zero.
4915 The characters read are decoded according to PROC's coding-system
4919 read_process_output (Lisp_Object proc
, register int channel
)
4921 register ssize_t nbytes
;
4923 register Lisp_Object outstream
;
4924 register struct Lisp_Process
*p
= XPROCESS (proc
);
4925 register ptrdiff_t opoint
;
4926 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4927 int carryover
= p
->decoding_carryover
;
4929 ptrdiff_t count
= SPECPDL_INDEX ();
4930 Lisp_Object odeactivate
;
4932 chars
= alloca (carryover
+ readmax
);
4934 /* See the comment above. */
4935 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
4937 #ifdef DATAGRAM_SOCKETS
4938 /* We have a working select, so proc_buffered_char is always -1. */
4939 if (DATAGRAM_CHAN_P (channel
))
4941 socklen_t len
= datagram_address
[channel
].len
;
4942 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
4943 0, datagram_address
[channel
].sa
, &len
);
4948 int buffered
= 0 <= proc_buffered_char
[channel
];
4951 chars
[carryover
] = proc_buffered_char
[channel
];
4952 proc_buffered_char
[channel
] = -1;
4956 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
4957 readmax
- buffered
);
4960 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
4961 readmax
- buffered
);
4962 #ifdef ADAPTIVE_READ_BUFFERING
4963 if (nbytes
> 0 && p
->adaptive_read_buffering
)
4965 int delay
= p
->read_output_delay
;
4968 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
4971 process_output_delay_count
++;
4972 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
4975 else if (delay
> 0 && nbytes
== readmax
- buffered
)
4977 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
4979 process_output_delay_count
--;
4981 p
->read_output_delay
= delay
;
4984 p
->read_output_skip
= 1;
4985 process_output_skip
= 1;
4990 nbytes
+= buffered
&& nbytes
<= 0;
4993 p
->decoding_carryover
= 0;
4995 /* At this point, NBYTES holds number of bytes just received
4996 (including the one in proc_buffered_char[channel]). */
4999 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5001 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5004 /* Now set NBYTES how many bytes we must decode. */
5005 nbytes
+= carryover
;
5007 odeactivate
= Vdeactivate_mark
;
5008 /* There's no good reason to let process filters change the current
5009 buffer, and many callers of accept-process-output, sit-for, and
5010 friends don't expect current-buffer to be changed from under them. */
5011 record_unwind_current_buffer ();
5013 /* Read and dispose of the process output. */
5014 outstream
= p
->filter
;
5015 if (!NILP (outstream
))
5018 bool outer_running_asynch_code
= running_asynch_code
;
5019 int waiting
= waiting_for_user_input_p
;
5021 /* No need to gcpro these, because all we do with them later
5022 is test them for EQness, and none of them should be a string. */
5024 Lisp_Object obuffer
, okeymap
;
5025 XSETBUFFER (obuffer
, current_buffer
);
5026 okeymap
= BVAR (current_buffer
, keymap
);
5029 /* We inhibit quit here instead of just catching it so that
5030 hitting ^G when a filter happens to be running won't screw
5032 specbind (Qinhibit_quit
, Qt
);
5033 specbind (Qlast_nonmenu_event
, Qt
);
5035 /* In case we get recursively called,
5036 and we already saved the match data nonrecursively,
5037 save the same match data in safely recursive fashion. */
5038 if (outer_running_asynch_code
)
5041 /* Don't clobber the CURRENT match data, either! */
5042 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5043 restore_search_regs ();
5044 record_unwind_save_match_data ();
5045 Fset_match_data (tem
, Qt
);
5048 /* For speed, if a search happens within this code,
5049 save the match data in a special nonrecursive fashion. */
5050 running_asynch_code
= 1;
5052 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5053 text
= coding
->dst_object
;
5054 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5055 /* A new coding system might be found. */
5056 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5058 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5060 /* Don't call setup_coding_system for
5061 proc_decode_coding_system[channel] here. It is done in
5062 detect_coding called via decode_coding above. */
5064 /* If a coding system for encoding is not yet decided, we set
5065 it as the same as coding-system for decoding.
5067 But, before doing that we must check if
5068 proc_encode_coding_system[p->outfd] surely points to a
5069 valid memory because p->outfd will be changed once EOF is
5070 sent to the process. */
5071 if (NILP (p
->encode_coding_system
)
5072 && proc_encode_coding_system
[p
->outfd
])
5074 pset_encode_coding_system
5075 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5076 setup_coding_system (p
->encode_coding_system
,
5077 proc_encode_coding_system
[p
->outfd
]);
5081 if (coding
->carryover_bytes
> 0)
5083 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5084 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5085 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5086 coding
->carryover_bytes
);
5087 p
->decoding_carryover
= coding
->carryover_bytes
;
5089 if (SBYTES (text
) > 0)
5090 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5091 sometimes it's simply wrong to wrap (e.g. when called from
5092 accept-process-output). */
5093 internal_condition_case_1 (read_process_output_call
,
5095 Fcons (proc
, Fcons (text
, Qnil
))),
5096 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5097 read_process_output_error_handler
);
5099 /* If we saved the match data nonrecursively, restore it now. */
5100 restore_search_regs ();
5101 running_asynch_code
= outer_running_asynch_code
;
5103 /* Restore waiting_for_user_input_p as it was
5104 when we were called, in case the filter clobbered it. */
5105 waiting_for_user_input_p
= waiting
;
5107 #if 0 /* Call record_asynch_buffer_change unconditionally,
5108 because we might have changed minor modes or other things
5109 that affect key bindings. */
5110 if (! EQ (Fcurrent_buffer (), obuffer
)
5111 || ! EQ (current_buffer
->keymap
, okeymap
))
5113 /* But do it only if the caller is actually going to read events.
5114 Otherwise there's no need to make him wake up, and it could
5115 cause trouble (for example it would make sit_for return). */
5116 if (waiting_for_user_input_p
== -1)
5117 record_asynch_buffer_change ();
5120 /* If no filter, write into buffer if it isn't dead. */
5121 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5123 Lisp_Object old_read_only
;
5124 ptrdiff_t old_begv
, old_zv
;
5125 ptrdiff_t old_begv_byte
, old_zv_byte
;
5126 ptrdiff_t before
, before_byte
;
5127 ptrdiff_t opoint_byte
;
5131 Fset_buffer (p
->buffer
);
5133 opoint_byte
= PT_BYTE
;
5134 old_read_only
= BVAR (current_buffer
, read_only
);
5137 old_begv_byte
= BEGV_BYTE
;
5138 old_zv_byte
= ZV_BYTE
;
5140 bset_read_only (current_buffer
, Qnil
);
5142 /* Insert new output into buffer
5143 at the current end-of-output marker,
5144 thus preserving logical ordering of input and output. */
5145 if (XMARKER (p
->mark
)->buffer
)
5146 SET_PT_BOTH (clip_to_bounds (BEGV
,
5147 marker_position (p
->mark
), ZV
),
5148 clip_to_bounds (BEGV_BYTE
,
5149 marker_byte_position (p
->mark
),
5152 SET_PT_BOTH (ZV
, ZV_BYTE
);
5154 before_byte
= PT_BYTE
;
5156 /* If the output marker is outside of the visible region, save
5157 the restriction and widen. */
5158 if (! (BEGV
<= PT
&& PT
<= ZV
))
5161 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5162 text
= coding
->dst_object
;
5163 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5164 /* A new coding system might be found. See the comment in the
5165 similar code in the previous `if' block. */
5166 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5168 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5169 if (NILP (p
->encode_coding_system
)
5170 && proc_encode_coding_system
[p
->outfd
])
5172 pset_encode_coding_system
5173 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5174 setup_coding_system (p
->encode_coding_system
,
5175 proc_encode_coding_system
[p
->outfd
]);
5178 if (coding
->carryover_bytes
> 0)
5180 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5181 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5182 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5183 coding
->carryover_bytes
);
5184 p
->decoding_carryover
= coding
->carryover_bytes
;
5186 /* Adjust the multibyteness of TEXT to that of the buffer. */
5187 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5188 != ! STRING_MULTIBYTE (text
))
5189 text
= (STRING_MULTIBYTE (text
)
5190 ? Fstring_as_unibyte (text
)
5191 : Fstring_to_multibyte (text
));
5192 /* Insert before markers in case we are inserting where
5193 the buffer's mark is, and the user's next command is Meta-y. */
5194 insert_from_string_before_markers (text
, 0, 0,
5195 SCHARS (text
), SBYTES (text
), 0);
5197 /* Make sure the process marker's position is valid when the
5198 process buffer is changed in the signal_after_change above.
5199 W3 is known to do that. */
5200 if (BUFFERP (p
->buffer
)
5201 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5202 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5204 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5206 update_mode_lines
++;
5208 /* Make sure opoint and the old restrictions
5209 float ahead of any new text just as point would. */
5210 if (opoint
>= before
)
5212 opoint
+= PT
- before
;
5213 opoint_byte
+= PT_BYTE
- before_byte
;
5215 if (old_begv
> before
)
5217 old_begv
+= PT
- before
;
5218 old_begv_byte
+= PT_BYTE
- before_byte
;
5220 if (old_zv
>= before
)
5222 old_zv
+= PT
- before
;
5223 old_zv_byte
+= PT_BYTE
- before_byte
;
5226 /* If the restriction isn't what it should be, set it. */
5227 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5228 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5231 bset_read_only (current_buffer
, old_read_only
);
5232 SET_PT_BOTH (opoint
, opoint_byte
);
5234 /* Handling the process output should not deactivate the mark. */
5235 Vdeactivate_mark
= odeactivate
;
5237 unbind_to (count
, Qnil
);
5241 /* Sending data to subprocess */
5243 /* In send_process, when a write fails temporarily,
5244 wait_reading_process_output is called. It may execute user code,
5245 e.g. timers, that attempts to write new data to the same process.
5246 We must ensure that data is sent in the right order, and not
5247 interspersed half-completed with other writes (Bug#10815). This is
5248 handled by the write_queue element of struct process. It is a list
5249 with each entry having the form
5251 (string . (offset . length))
5253 where STRING is a lisp string, OFFSET is the offset into the
5254 string's byte sequence from which we should begin to send, and
5255 LENGTH is the number of bytes left to send. */
5257 /* Create a new entry in write_queue.
5258 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5259 BUF is a pointer to the string sequence of the input_obj or a C
5260 string in case of Qt or Qnil. */
5263 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5264 const char *buf
, ptrdiff_t len
, int front
)
5267 Lisp_Object entry
, obj
;
5269 if (STRINGP (input_obj
))
5271 offset
= buf
- SSDATA (input_obj
);
5277 obj
= make_unibyte_string (buf
, len
);
5280 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5283 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5285 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5288 /* Remove the first element in the write_queue of process P, put its
5289 contents in OBJ, BUF and LEN, and return non-zero. If the
5290 write_queue is empty, return zero. */
5293 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5294 const char **buf
, ptrdiff_t *len
)
5296 Lisp_Object entry
, offset_length
;
5299 if (NILP (p
->write_queue
))
5302 entry
= XCAR (p
->write_queue
);
5303 pset_write_queue (p
, XCDR (p
->write_queue
));
5305 *obj
= XCAR (entry
);
5306 offset_length
= XCDR (entry
);
5308 *len
= XINT (XCDR (offset_length
));
5309 offset
= XINT (XCAR (offset_length
));
5310 *buf
= SSDATA (*obj
) + offset
;
5315 /* Send some data to process PROC.
5316 BUF is the beginning of the data; LEN is the number of characters.
5317 OBJECT is the Lisp object that the data comes from. If OBJECT is
5318 nil or t, it means that the data comes from C string.
5320 If OBJECT is not nil, the data is encoded by PROC's coding-system
5321 for encoding before it is sent.
5323 This function can evaluate Lisp code and can garbage collect. */
5326 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5329 struct Lisp_Process
*p
= XPROCESS (proc
);
5331 struct coding_system
*coding
;
5333 if (p
->raw_status_new
)
5335 if (! EQ (p
->status
, Qrun
))
5336 error ("Process %s not running", SDATA (p
->name
));
5338 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5340 coding
= proc_encode_coding_system
[p
->outfd
];
5341 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5343 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5344 || (BUFFERP (object
)
5345 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5348 pset_encode_coding_system
5349 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5350 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5352 /* The coding system for encoding was changed to raw-text
5353 because we sent a unibyte text previously. Now we are
5354 sending a multibyte text, thus we must encode it by the
5355 original coding system specified for the current process.
5357 Another reason we come here is that the coding system
5358 was just complemented and a new one was returned by
5359 complement_process_encoding_system. */
5360 setup_coding_system (p
->encode_coding_system
, coding
);
5361 Vlast_coding_system_used
= p
->encode_coding_system
;
5363 coding
->src_multibyte
= 1;
5367 coding
->src_multibyte
= 0;
5368 /* For sending a unibyte text, character code conversion should
5369 not take place but EOL conversion should. So, setup raw-text
5370 or one of the subsidiary if we have not yet done it. */
5371 if (CODING_REQUIRE_ENCODING (coding
))
5373 if (CODING_REQUIRE_FLUSHING (coding
))
5375 /* But, before changing the coding, we must flush out data. */
5376 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5377 send_process (proc
, "", 0, Qt
);
5378 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5380 setup_coding_system (raw_text_coding_system
5381 (Vlast_coding_system_used
),
5383 coding
->src_multibyte
= 0;
5386 coding
->dst_multibyte
= 0;
5388 if (CODING_REQUIRE_ENCODING (coding
))
5390 coding
->dst_object
= Qt
;
5391 if (BUFFERP (object
))
5393 ptrdiff_t from_byte
, from
, to
;
5394 ptrdiff_t save_pt
, save_pt_byte
;
5395 struct buffer
*cur
= current_buffer
;
5397 set_buffer_internal (XBUFFER (object
));
5398 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5400 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5401 from
= BYTE_TO_CHAR (from_byte
);
5402 to
= BYTE_TO_CHAR (from_byte
+ len
);
5403 TEMP_SET_PT_BOTH (from
, from_byte
);
5404 encode_coding_object (coding
, object
, from
, from_byte
,
5405 to
, from_byte
+ len
, Qt
);
5406 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5407 set_buffer_internal (cur
);
5409 else if (STRINGP (object
))
5411 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5412 SBYTES (object
), Qt
);
5416 coding
->dst_object
= make_unibyte_string (buf
, len
);
5417 coding
->produced
= len
;
5420 len
= coding
->produced
;
5421 object
= coding
->dst_object
;
5422 buf
= SSDATA (object
);
5425 /* If there is already data in the write_queue, put the new data
5426 in the back of queue. Otherwise, ignore it. */
5427 if (!NILP (p
->write_queue
))
5428 write_queue_push (p
, object
, buf
, len
, 0);
5430 do /* while !NILP (p->write_queue) */
5432 ptrdiff_t cur_len
= -1;
5433 const char *cur_buf
;
5434 Lisp_Object cur_object
;
5436 /* If write_queue is empty, ignore it. */
5437 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5441 cur_object
= object
;
5446 /* Send this batch, using one or more write calls. */
5447 ptrdiff_t written
= 0;
5448 int outfd
= p
->outfd
;
5449 #ifdef DATAGRAM_SOCKETS
5450 if (DATAGRAM_CHAN_P (outfd
))
5452 rv
= sendto (outfd
, cur_buf
, cur_len
,
5453 0, datagram_address
[outfd
].sa
,
5454 datagram_address
[outfd
].len
);
5457 else if (errno
== EMSGSIZE
)
5458 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5465 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5468 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5469 rv
= (written
? 0 : -1);
5470 #ifdef ADAPTIVE_READ_BUFFERING
5471 if (p
->read_output_delay
> 0
5472 && p
->adaptive_read_buffering
== 1)
5474 p
->read_output_delay
= 0;
5475 process_output_delay_count
--;
5476 p
->read_output_skip
= 0;
5485 || errno
== EWOULDBLOCK
5488 /* Buffer is full. Wait, accepting input;
5489 that may allow the program
5490 to finish doing output and read more. */
5492 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5493 /* A gross hack to work around a bug in FreeBSD.
5494 In the following sequence, read(2) returns
5498 write(2) 954 bytes, get EAGAIN
5499 read(2) 1024 bytes in process_read_output
5500 read(2) 11 bytes in process_read_output
5502 That is, read(2) returns more bytes than have
5503 ever been written successfully. The 1033 bytes
5504 read are the 1022 bytes written successfully
5505 after processing (for example with CRs added if
5506 the terminal is set up that way which it is
5507 here). The same bytes will be seen again in a
5508 later read(2), without the CRs. */
5510 if (errno
== EAGAIN
)
5513 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5515 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5517 /* Put what we should have written in wait_queue. */
5518 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5519 wait_reading_process_output (0, 20 * 1000 * 1000,
5520 0, 0, Qnil
, NULL
, 0);
5521 /* Reread queue, to see what is left. */
5524 else if (errno
== EPIPE
)
5526 p
->raw_status_new
= 0;
5527 pset_status (p
, list2 (Qexit
, make_number (256)));
5528 p
->tick
= ++process_tick
;
5529 deactivate_process (proc
);
5530 error ("process %s no longer connected to pipe; closed it",
5534 /* This is a real error. */
5535 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5541 while (!NILP (p
->write_queue
));
5544 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5546 doc
: /* Send current contents of region as input to PROCESS.
5547 PROCESS may be a process, a buffer, the name of a process or buffer, or
5548 nil, indicating the current buffer's process.
5549 Called from program, takes three arguments, PROCESS, START and END.
5550 If the region is more than 500 characters long,
5551 it is sent in several bunches. This may happen even for shorter regions.
5552 Output from processes can arrive in between bunches. */)
5553 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5555 Lisp_Object proc
= get_process (process
);
5556 ptrdiff_t start_byte
, end_byte
;
5558 validate_region (&start
, &end
);
5560 start_byte
= CHAR_TO_BYTE (XINT (start
));
5561 end_byte
= CHAR_TO_BYTE (XINT (end
));
5563 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5564 move_gap_both (XINT (start
), start_byte
);
5566 send_process (proc
, (char *) BYTE_POS_ADDR (start_byte
),
5567 end_byte
- start_byte
, Fcurrent_buffer ());
5572 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5574 doc
: /* Send PROCESS the contents of STRING as input.
5575 PROCESS may be a process, a buffer, the name of a process or buffer, or
5576 nil, indicating the current buffer's process.
5577 If STRING is more than 500 characters long,
5578 it is sent in several bunches. This may happen even for shorter strings.
5579 Output from processes can arrive in between bunches. */)
5580 (Lisp_Object process
, Lisp_Object string
)
5583 CHECK_STRING (string
);
5584 proc
= get_process (process
);
5585 send_process (proc
, SSDATA (string
),
5586 SBYTES (string
), string
);
5590 /* Return the foreground process group for the tty/pty that
5591 the process P uses. */
5593 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5598 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5601 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5602 master side. Try the slave side. */
5603 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5607 ioctl (fd
, TIOCGPGRP
, &gid
);
5611 #endif /* defined (TIOCGPGRP ) */
5616 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5617 Sprocess_running_child_p
, 0, 1, 0,
5618 doc
: /* Return t if PROCESS has given the terminal to a child.
5619 If the operating system does not make it possible to find out,
5620 return t unconditionally. */)
5621 (Lisp_Object process
)
5623 /* Initialize in case ioctl doesn't exist or gives an error,
5624 in a way that will cause returning t. */
5627 struct Lisp_Process
*p
;
5629 proc
= get_process (process
);
5630 p
= XPROCESS (proc
);
5632 if (!EQ (p
->type
, Qreal
))
5633 error ("Process %s is not a subprocess",
5636 error ("Process %s is not active",
5639 gid
= emacs_get_tty_pgrp (p
);
5646 /* send a signal number SIGNO to PROCESS.
5647 If CURRENT_GROUP is t, that means send to the process group
5648 that currently owns the terminal being used to communicate with PROCESS.
5649 This is used for various commands in shell mode.
5650 If CURRENT_GROUP is lambda, that means send to the process group
5651 that currently owns the terminal, but only if it is NOT the shell itself.
5653 If NOMSG is zero, insert signal-announcements into process's buffers
5656 If we can, we try to signal PROCESS by sending control characters
5657 down the pty. This allows us to signal inferiors who have changed
5658 their uid, for which kill would return an EPERM error. */
5661 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5665 register struct Lisp_Process
*p
;
5669 proc
= get_process (process
);
5670 p
= XPROCESS (proc
);
5672 if (!EQ (p
->type
, Qreal
))
5673 error ("Process %s is not a subprocess",
5676 error ("Process %s is not active",
5680 current_group
= Qnil
;
5682 /* If we are using pgrps, get a pgrp number and make it negative. */
5683 if (NILP (current_group
))
5684 /* Send the signal to the shell's process group. */
5688 #ifdef SIGNALS_VIA_CHARACTERS
5689 /* If possible, send signals to the entire pgrp
5690 by sending an input character to it. */
5693 cc_t
*sig_char
= NULL
;
5695 tcgetattr (p
->infd
, &t
);
5700 sig_char
= &t
.c_cc
[VINTR
];
5704 sig_char
= &t
.c_cc
[VQUIT
];
5708 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5709 sig_char
= &t
.c_cc
[VSWTCH
];
5711 sig_char
= &t
.c_cc
[VSUSP
];
5716 if (sig_char
&& *sig_char
!= CDISABLE
)
5718 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5721 /* If we can't send the signal with a character,
5722 fall through and send it another way. */
5724 /* The code above may fall through if it can't
5725 handle the signal. */
5726 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5729 /* Get the current pgrp using the tty itself, if we have that.
5730 Otherwise, use the pty to get the pgrp.
5731 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5732 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5733 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5734 His patch indicates that if TIOCGPGRP returns an error, then
5735 we should just assume that p->pid is also the process group id. */
5737 gid
= emacs_get_tty_pgrp (p
);
5740 /* If we can't get the information, assume
5741 the shell owns the tty. */
5744 /* It is not clear whether anything really can set GID to -1.
5745 Perhaps on some system one of those ioctls can or could do so.
5746 Or perhaps this is vestigial. */
5749 #else /* ! defined (TIOCGPGRP ) */
5750 /* Can't select pgrps on this system, so we know that
5751 the child itself heads the pgrp. */
5753 #endif /* ! defined (TIOCGPGRP ) */
5755 /* If current_group is lambda, and the shell owns the terminal,
5756 don't send any signal. */
5757 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5765 p
->raw_status_new
= 0;
5766 pset_status (p
, Qrun
);
5767 p
->tick
= ++process_tick
;
5770 status_notify (NULL
);
5771 redisplay_preserve_echo_area (13);
5774 #endif /* ! defined (SIGCONT) */
5778 flush_pending_output (p
->infd
);
5782 /* If we don't have process groups, send the signal to the immediate
5783 subprocess. That isn't really right, but it's better than any
5784 obvious alternative. */
5787 kill (p
->pid
, signo
);
5791 /* gid may be a pid, or minus a pgrp's number */
5793 if (!NILP (current_group
))
5795 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5803 #else /* ! defined (TIOCSIGSEND) */
5805 #endif /* ! defined (TIOCSIGSEND) */
5808 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5809 doc
: /* Interrupt process PROCESS.
5810 PROCESS may be a process, a buffer, or the name of a process or buffer.
5811 No arg or nil means current buffer's process.
5812 Second arg CURRENT-GROUP non-nil means send signal to
5813 the current process-group of the process's controlling terminal
5814 rather than to the process's own process group.
5815 If the process is a shell, this means interrupt current subjob
5816 rather than the shell.
5818 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5819 don't send the signal. */)
5820 (Lisp_Object process
, Lisp_Object current_group
)
5822 process_send_signal (process
, SIGINT
, current_group
, 0);
5826 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5827 doc
: /* Kill process PROCESS. May be process or name of one.
5828 See function `interrupt-process' for more details on usage. */)
5829 (Lisp_Object process
, Lisp_Object current_group
)
5831 process_send_signal (process
, SIGKILL
, current_group
, 0);
5835 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5836 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5837 See function `interrupt-process' for more details on usage. */)
5838 (Lisp_Object process
, Lisp_Object current_group
)
5840 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5844 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5845 doc
: /* Stop process PROCESS. May be process or name of one.
5846 See function `interrupt-process' for more details on usage.
5847 If PROCESS is a network or serial process, inhibit handling of incoming
5849 (Lisp_Object process
, Lisp_Object current_group
)
5851 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5853 struct Lisp_Process
*p
;
5855 p
= XPROCESS (process
);
5856 if (NILP (p
->command
)
5859 FD_CLR (p
->infd
, &input_wait_mask
);
5860 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5862 pset_command (p
, Qt
);
5866 error ("No SIGTSTP support");
5868 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5873 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5874 doc
: /* Continue process PROCESS. May be process or name of one.
5875 See function `interrupt-process' for more details on usage.
5876 If PROCESS is a network or serial process, resume handling of incoming
5878 (Lisp_Object process
, Lisp_Object current_group
)
5880 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5882 struct Lisp_Process
*p
;
5884 p
= XPROCESS (process
);
5885 if (EQ (p
->command
, Qt
)
5887 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5889 FD_SET (p
->infd
, &input_wait_mask
);
5890 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5892 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5893 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5894 #else /* not WINDOWSNT */
5895 tcflush (p
->infd
, TCIFLUSH
);
5896 #endif /* not WINDOWSNT */
5898 pset_command (p
, Qnil
);
5902 process_send_signal (process
, SIGCONT
, current_group
, 0);
5904 error ("No SIGCONT support");
5909 /* Return the integer value of the signal whose abbreviation is ABBR,
5910 or a negative number if there is no such signal. */
5912 abbr_to_signal (char const *name
)
5915 char sigbuf
[20]; /* Large enough for all valid signal abbreviations. */
5917 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
5920 for (i
= 0; i
< sizeof sigbuf
; i
++)
5922 sigbuf
[i
] = c_toupper (name
[i
]);
5924 return str2sig (sigbuf
, &signo
) == 0 ? signo
: -1;
5930 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5931 2, 2, "sProcess (name or number): \nnSignal code: ",
5932 doc
: /* Send PROCESS the signal with code SIGCODE.
5933 PROCESS may also be a number specifying the process id of the
5934 process to signal; in this case, the process need not be a child of
5936 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5937 (Lisp_Object process
, Lisp_Object sigcode
)
5942 if (STRINGP (process
))
5944 Lisp_Object tem
= Fget_process (process
);
5947 Lisp_Object process_number
=
5948 string_to_number (SSDATA (process
), 10, 1);
5949 if (INTEGERP (process_number
) || FLOATP (process_number
))
5950 tem
= process_number
;
5954 else if (!NUMBERP (process
))
5955 process
= get_process (process
);
5960 if (NUMBERP (process
))
5961 CONS_TO_INTEGER (process
, pid_t
, pid
);
5964 CHECK_PROCESS (process
);
5965 pid
= XPROCESS (process
)->pid
;
5967 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5970 if (INTEGERP (sigcode
))
5972 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
5973 signo
= XINT (sigcode
);
5979 CHECK_SYMBOL (sigcode
);
5980 name
= SSDATA (SYMBOL_NAME (sigcode
));
5982 signo
= abbr_to_signal (name
);
5984 error ("Undefined signal name %s", name
);
5987 return make_number (kill (pid
, signo
));
5990 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
5991 doc
: /* Make PROCESS see end-of-file in its input.
5992 EOF comes after any text already sent to it.
5993 PROCESS may be a process, a buffer, the name of a process or buffer, or
5994 nil, indicating the current buffer's process.
5995 If PROCESS is a network connection, or is a process communicating
5996 through a pipe (as opposed to a pty), then you cannot send any more
5997 text to PROCESS after you call this function.
5998 If PROCESS is a serial process, wait until all output written to the
5999 process has been transmitted to the serial port. */)
6000 (Lisp_Object process
)
6003 struct coding_system
*coding
;
6005 if (DATAGRAM_CONN_P (process
))
6008 proc
= get_process (process
);
6009 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6011 /* Make sure the process is really alive. */
6012 if (XPROCESS (proc
)->raw_status_new
)
6013 update_status (XPROCESS (proc
));
6014 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6015 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6017 if (CODING_REQUIRE_FLUSHING (coding
))
6019 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6020 send_process (proc
, "", 0, Qnil
);
6023 if (XPROCESS (proc
)->pty_flag
)
6024 send_process (proc
, "\004", 1, Qnil
);
6025 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6028 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6029 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6030 #endif /* not WINDOWSNT */
6031 /* Do nothing on Windows because writes are blocking. */
6035 int old_outfd
, new_outfd
;
6037 #ifdef HAVE_SHUTDOWN
6038 /* If this is a network connection, or socketpair is used
6039 for communication with the subprocess, call shutdown to cause EOF.
6040 (In some old system, shutdown to socketpair doesn't work.
6041 Then we just can't win.) */
6042 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6043 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6044 shutdown (XPROCESS (proc
)->outfd
, 1);
6045 /* In case of socketpair, outfd == infd, so don't close it. */
6046 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6047 emacs_close (XPROCESS (proc
)->outfd
);
6048 #else /* not HAVE_SHUTDOWN */
6049 emacs_close (XPROCESS (proc
)->outfd
);
6050 #endif /* not HAVE_SHUTDOWN */
6051 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6054 old_outfd
= XPROCESS (proc
)->outfd
;
6056 if (!proc_encode_coding_system
[new_outfd
])
6057 proc_encode_coding_system
[new_outfd
]
6058 = xmalloc (sizeof (struct coding_system
));
6059 *proc_encode_coding_system
[new_outfd
]
6060 = *proc_encode_coding_system
[old_outfd
];
6061 memset (proc_encode_coding_system
[old_outfd
], 0,
6062 sizeof (struct coding_system
));
6064 XPROCESS (proc
)->outfd
= new_outfd
;
6069 /* The main Emacs thread records child processes in three places:
6071 - Vprocess_alist, for asynchronous subprocesses, which are child
6072 processes visible to Lisp.
6074 - deleted_pid_list, for child processes invisible to Lisp,
6075 typically because of delete-process. These are recorded so that
6076 the processes can be reaped when they exit, so that the operating
6077 system's process table is not cluttered by zombies.
6079 - the local variable PID in Fcall_process, call_process_cleanup and
6080 call_process_kill, for synchronous subprocesses.
6081 record_unwind_protect is used to make sure this process is not
6082 forgotten: if the user interrupts call-process and the child
6083 process refuses to exit immediately even with two C-g's,
6084 call_process_kill adds PID's contents to deleted_pid_list before
6087 The main Emacs thread invokes waitpid only on child processes that
6088 it creates and that have not been reaped. This avoid races on
6089 platforms such as GTK, where other threads create their own
6090 subprocesses which the main thread should not reap. For example,
6091 if the main thread attempted to reap an already-reaped child, it
6092 might inadvertently reap a GTK-created process that happened to
6093 have the same process ID. */
6095 /* Handle a SIGCHLD signal by looking for known child processes of
6096 Emacs whose status have changed. For each one found, record its
6099 All we do is change the status; we do not run sentinels or print
6100 notifications. That is saved for the next time keyboard input is
6101 done, in order to avoid timing errors.
6103 ** WARNING: this can be called during garbage collection.
6104 Therefore, it must not be fooled by the presence of mark bits in
6107 ** USG WARNING: Although it is not obvious from the documentation
6108 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6109 signal() before executing at least one wait(), otherwise the
6110 handler will be called again, resulting in an infinite loop. The
6111 relevant portion of the documentation reads "SIGCLD signals will be
6112 queued and the signal-catching function will be continually
6113 reentered until the queue is empty". Invoking signal() causes the
6114 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6117 ** Malloc WARNING: This should never call malloc either directly or
6118 indirectly; if it does, that is a bug */
6121 handle_child_signal (int sig
)
6125 /* Find the process that signaled us, and record its status. */
6127 /* The process can have been deleted by Fdelete_process, or have
6128 been started asynchronously by Fcall_process. */
6129 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6131 bool all_pids_are_fixnums
6132 = (MOST_NEGATIVE_FIXNUM
<= TYPE_MINIMUM (pid_t
)
6133 && TYPE_MAXIMUM (pid_t
) <= MOST_POSITIVE_FIXNUM
);
6134 Lisp_Object xpid
= XCAR (tail
);
6135 if (all_pids_are_fixnums
? INTEGERP (xpid
) : NUMBERP (xpid
))
6138 if (INTEGERP (xpid
))
6139 deleted_pid
= XINT (xpid
);
6141 deleted_pid
= XFLOAT_DATA (xpid
);
6142 if (child_status_changed (deleted_pid
, 0, 0))
6143 XSETCAR (tail
, Qnil
);
6147 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6148 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6150 Lisp_Object proc
= XCDR (XCAR (tail
));
6151 struct Lisp_Process
*p
= XPROCESS (proc
);
6154 if (p
->alive
&& child_status_changed (p
->pid
, &status
, WUNTRACED
))
6156 /* Change the status of the process that was found. */
6157 p
->tick
= ++process_tick
;
6158 p
->raw_status
= status
;
6159 p
->raw_status_new
= 1;
6161 /* If process has terminated, stop waiting for its output. */
6162 if (WIFSIGNALED (status
) || WIFEXITED (status
))
6164 int clear_desc_flag
= 0;
6167 clear_desc_flag
= 1;
6169 /* clear_desc_flag avoids a compiler bug in Microsoft C. */
6170 if (clear_desc_flag
)
6172 FD_CLR (p
->infd
, &input_wait_mask
);
6173 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6181 deliver_child_signal (int sig
)
6183 deliver_process_signal (sig
, handle_child_signal
);
6188 exec_sentinel_unwind (Lisp_Object data
)
6190 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6195 exec_sentinel_error_handler (Lisp_Object error_val
)
6197 cmd_error_internal (error_val
, "error in process sentinel: ");
6199 update_echo_area ();
6200 Fsleep_for (make_number (2), Qnil
);
6205 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6207 Lisp_Object sentinel
, odeactivate
;
6208 struct Lisp_Process
*p
= XPROCESS (proc
);
6209 ptrdiff_t count
= SPECPDL_INDEX ();
6210 bool outer_running_asynch_code
= running_asynch_code
;
6211 int waiting
= waiting_for_user_input_p
;
6213 if (inhibit_sentinels
)
6216 /* No need to gcpro these, because all we do with them later
6217 is test them for EQness, and none of them should be a string. */
6218 odeactivate
= Vdeactivate_mark
;
6220 Lisp_Object obuffer
, okeymap
;
6221 XSETBUFFER (obuffer
, current_buffer
);
6222 okeymap
= BVAR (current_buffer
, keymap
);
6225 /* There's no good reason to let sentinels change the current
6226 buffer, and many callers of accept-process-output, sit-for, and
6227 friends don't expect current-buffer to be changed from under them. */
6228 record_unwind_current_buffer ();
6230 sentinel
= p
->sentinel
;
6231 if (NILP (sentinel
))
6234 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6235 assure that it gets restored no matter how the sentinel exits. */
6236 pset_sentinel (p
, Qnil
);
6237 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6238 /* Inhibit quit so that random quits don't screw up a running filter. */
6239 specbind (Qinhibit_quit
, Qt
);
6240 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6242 /* In case we get recursively called,
6243 and we already saved the match data nonrecursively,
6244 save the same match data in safely recursive fashion. */
6245 if (outer_running_asynch_code
)
6248 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6249 restore_search_regs ();
6250 record_unwind_save_match_data ();
6251 Fset_match_data (tem
, Qt
);
6254 /* For speed, if a search happens within this code,
6255 save the match data in a special nonrecursive fashion. */
6256 running_asynch_code
= 1;
6258 internal_condition_case_1 (read_process_output_call
,
6260 Fcons (proc
, Fcons (reason
, Qnil
))),
6261 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6262 exec_sentinel_error_handler
);
6264 /* If we saved the match data nonrecursively, restore it now. */
6265 restore_search_regs ();
6266 running_asynch_code
= outer_running_asynch_code
;
6268 Vdeactivate_mark
= odeactivate
;
6270 /* Restore waiting_for_user_input_p as it was
6271 when we were called, in case the filter clobbered it. */
6272 waiting_for_user_input_p
= waiting
;
6275 if (! EQ (Fcurrent_buffer (), obuffer
)
6276 || ! EQ (current_buffer
->keymap
, okeymap
))
6278 /* But do it only if the caller is actually going to read events.
6279 Otherwise there's no need to make him wake up, and it could
6280 cause trouble (for example it would make sit_for return). */
6281 if (waiting_for_user_input_p
== -1)
6282 record_asynch_buffer_change ();
6284 unbind_to (count
, Qnil
);
6287 /* Report all recent events of a change in process status
6288 (either run the sentinel or output a message).
6289 This is usually done while Emacs is waiting for keyboard input
6290 but can be done at other times. */
6293 status_notify (struct Lisp_Process
*deleting_process
)
6295 register Lisp_Object proc
, buffer
;
6296 Lisp_Object tail
, msg
;
6297 struct gcpro gcpro1
, gcpro2
;
6301 /* We need to gcpro tail; if read_process_output calls a filter
6302 which deletes a process and removes the cons to which tail points
6303 from Vprocess_alist, and then causes a GC, tail is an unprotected
6307 /* Set this now, so that if new processes are created by sentinels
6308 that we run, we get called again to handle their status changes. */
6309 update_tick
= process_tick
;
6311 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6314 register struct Lisp_Process
*p
;
6316 proc
= Fcdr (XCAR (tail
));
6317 p
= XPROCESS (proc
);
6319 if (p
->tick
!= p
->update_tick
)
6321 p
->update_tick
= p
->tick
;
6323 /* If process is still active, read any output that remains. */
6324 while (! EQ (p
->filter
, Qt
)
6325 && ! EQ (p
->status
, Qconnect
)
6326 && ! EQ (p
->status
, Qlisten
)
6327 /* Network or serial process not stopped: */
6328 && ! EQ (p
->command
, Qt
)
6330 && p
!= deleting_process
6331 && read_process_output (proc
, p
->infd
) > 0);
6335 /* Get the text to use for the message. */
6336 if (p
->raw_status_new
)
6338 msg
= status_message (p
);
6340 /* If process is terminated, deactivate it or delete it. */
6342 if (CONSP (p
->status
))
6343 symbol
= XCAR (p
->status
);
6345 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6346 || EQ (symbol
, Qclosed
))
6348 if (delete_exited_processes
)
6349 remove_process (proc
);
6351 deactivate_process (proc
);
6354 /* The actions above may have further incremented p->tick.
6355 So set p->update_tick again
6356 so that an error in the sentinel will not cause
6357 this code to be run again. */
6358 p
->update_tick
= p
->tick
;
6359 /* Now output the message suitably. */
6360 if (!NILP (p
->sentinel
))
6361 exec_sentinel (proc
, msg
);
6362 /* Don't bother with a message in the buffer
6363 when a process becomes runnable. */
6364 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6367 struct buffer
*old
= current_buffer
;
6368 ptrdiff_t opoint
, opoint_byte
;
6369 ptrdiff_t before
, before_byte
;
6371 /* Avoid error if buffer is deleted
6372 (probably that's why the process is dead, too) */
6373 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6375 Fset_buffer (buffer
);
6378 opoint_byte
= PT_BYTE
;
6379 /* Insert new output into buffer
6380 at the current end-of-output marker,
6381 thus preserving logical ordering of input and output. */
6382 if (XMARKER (p
->mark
)->buffer
)
6383 Fgoto_char (p
->mark
);
6385 SET_PT_BOTH (ZV
, ZV_BYTE
);
6388 before_byte
= PT_BYTE
;
6390 tem
= BVAR (current_buffer
, read_only
);
6391 bset_read_only (current_buffer
, Qnil
);
6392 insert_string ("\nProcess ");
6393 { /* FIXME: temporary kludge */
6394 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6395 insert_string (" ");
6397 bset_read_only (current_buffer
, tem
);
6398 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6400 if (opoint
>= before
)
6401 SET_PT_BOTH (opoint
+ (PT
- before
),
6402 opoint_byte
+ (PT_BYTE
- before_byte
));
6404 SET_PT_BOTH (opoint
, opoint_byte
);
6406 set_buffer_internal (old
);
6411 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6416 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6417 Sset_process_coding_system
, 1, 3, 0,
6418 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6419 DECODING will be used to decode subprocess output and ENCODING to
6420 encode subprocess input. */)
6421 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6423 register struct Lisp_Process
*p
;
6425 CHECK_PROCESS (process
);
6426 p
= XPROCESS (process
);
6428 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6430 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6431 Fcheck_coding_system (decoding
);
6432 Fcheck_coding_system (encoding
);
6433 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6434 pset_decode_coding_system (p
, decoding
);
6435 pset_encode_coding_system (p
, encoding
);
6436 setup_process_coding_systems (process
);
6441 DEFUN ("process-coding-system",
6442 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6443 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6444 (register Lisp_Object process
)
6446 CHECK_PROCESS (process
);
6447 return Fcons (XPROCESS (process
)->decode_coding_system
,
6448 XPROCESS (process
)->encode_coding_system
);
6451 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6452 Sset_process_filter_multibyte
, 2, 2, 0,
6453 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6454 If FLAG is non-nil, the filter is given multibyte strings.
6455 If FLAG is nil, the filter is given unibyte strings. In this case,
6456 all character code conversion except for end-of-line conversion is
6458 (Lisp_Object process
, Lisp_Object flag
)
6460 register struct Lisp_Process
*p
;
6462 CHECK_PROCESS (process
);
6463 p
= XPROCESS (process
);
6465 pset_decode_coding_system
6466 (p
, raw_text_coding_system (p
->decode_coding_system
));
6467 setup_process_coding_systems (process
);
6472 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6473 Sprocess_filter_multibyte_p
, 1, 1, 0,
6474 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6475 (Lisp_Object process
)
6477 register struct Lisp_Process
*p
;
6478 struct coding_system
*coding
;
6480 CHECK_PROCESS (process
);
6481 p
= XPROCESS (process
);
6482 coding
= proc_decode_coding_system
[p
->infd
];
6483 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6492 add_gpm_wait_descriptor (int desc
)
6494 add_keyboard_wait_descriptor (desc
);
6498 delete_gpm_wait_descriptor (int desc
)
6500 delete_keyboard_wait_descriptor (desc
);
6505 # ifdef USABLE_SIGIO
6507 /* Return nonzero if *MASK has a bit set
6508 that corresponds to one of the keyboard input descriptors. */
6511 keyboard_bit_set (fd_set
*mask
)
6515 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6516 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6517 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6524 #else /* not subprocesses */
6526 /* Defined on msdos.c. */
6527 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6528 EMACS_TIME
*, void *);
6530 /* Implementation of wait_reading_process_output, assuming that there
6531 are no subprocesses. Used only by the MS-DOS build.
6533 Wait for timeout to elapse and/or keyboard input to be available.
6537 If negative, gobble data immediately available but don't wait for any.
6540 an additional duration to wait, measured in nanoseconds
6541 If TIME_LIMIT is zero, then:
6542 If NSECS == 0, there is no limit.
6543 If NSECS > 0, the timeout consists of NSECS only.
6544 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6547 0 to ignore keyboard input, or
6548 1 to return when input is available, or
6549 -1 means caller will actually read the input, so don't throw to
6552 see full version for other parameters. We know that wait_proc will
6553 always be NULL, since `subprocesses' isn't defined.
6555 DO_DISPLAY means redisplay should be done to show subprocess
6556 output that arrives.
6558 Return true if we received input from any process. */
6561 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6563 Lisp_Object wait_for_cell
,
6564 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6567 EMACS_TIME end_time
, timeout
;
6574 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6575 time_limit
= TYPE_MAXIMUM (time_t);
6577 /* What does time_limit really mean? */
6578 if (time_limit
|| 0 < nsecs
)
6580 timeout
= make_emacs_time (time_limit
, nsecs
);
6581 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6584 /* Turn off periodic alarms (in case they are in use)
6585 and then turn off any other atimers,
6586 because the select emulator uses alarms. */
6588 turn_on_atimers (0);
6592 int timeout_reduced_for_timers
= 0;
6593 SELECT_TYPE waitchannels
;
6596 /* If calling from keyboard input, do not quit
6597 since we want to return C-g as an input character.
6598 Otherwise, do pending quit if requested. */
6602 /* Exit now if the cell we're waiting for became non-nil. */
6603 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6606 /* Compute time from now till when time limit is up */
6607 /* Exit if already run out */
6610 /* A negative timeout means
6611 gobble output available now
6612 but don't wait at all. */
6614 timeout
= make_emacs_time (0, 0);
6616 else if (time_limit
|| 0 < nsecs
)
6618 EMACS_TIME now
= current_emacs_time ();
6619 if (EMACS_TIME_LE (end_time
, now
))
6621 timeout
= sub_emacs_time (end_time
, now
);
6625 timeout
= make_emacs_time (100000, 0);
6628 /* If our caller will not immediately handle keyboard events,
6629 run timer events directly.
6630 (Callers that will immediately read keyboard events
6631 call timer_delay on their own.) */
6632 if (NILP (wait_for_cell
))
6634 EMACS_TIME timer_delay
;
6638 unsigned old_timers_run
= timers_run
;
6639 timer_delay
= timer_check ();
6640 if (timers_run
!= old_timers_run
&& do_display
)
6641 /* We must retry, since a timer may have requeued itself
6642 and that could alter the time delay. */
6643 redisplay_preserve_echo_area (14);
6647 while (!detect_input_pending ());
6649 /* If there is unread keyboard input, also return. */
6651 && requeued_events_pending_p ())
6654 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6656 if (EMACS_TIME_LT (timer_delay
, timeout
))
6658 timeout
= timer_delay
;
6659 timeout_reduced_for_timers
= 1;
6664 /* Cause C-g and alarm signals to take immediate action,
6665 and cause input available signals to zero out timeout. */
6667 set_waiting_for_input (&timeout
);
6669 /* If a frame has been newly mapped and needs updating,
6670 reprocess its display stuff. */
6671 if (frame_garbaged
&& do_display
)
6673 clear_waiting_for_input ();
6674 redisplay_preserve_echo_area (15);
6676 set_waiting_for_input (&timeout
);
6679 /* Wait till there is something to do. */
6680 FD_ZERO (&waitchannels
);
6681 if (read_kbd
&& detect_input_pending ())
6685 if (read_kbd
|| !NILP (wait_for_cell
))
6686 FD_SET (0, &waitchannels
);
6687 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6692 /* Make C-g and alarm signals set flags again */
6693 clear_waiting_for_input ();
6695 /* If we woke up due to SIGWINCH, actually change size now. */
6696 do_pending_window_change (0);
6698 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6699 /* We waited the full specified time, so return now. */
6704 /* If the system call was interrupted, then go around the
6706 if (xerrno
== EINTR
)
6707 FD_ZERO (&waitchannels
);
6709 error ("select error: %s", emacs_strerror (xerrno
));
6712 /* Check for keyboard input */
6715 && detect_input_pending_run_timers (do_display
))
6717 swallow_events (do_display
);
6718 if (detect_input_pending_run_timers (do_display
))
6722 /* If there is unread keyboard input, also return. */
6724 && requeued_events_pending_p ())
6727 /* If wait_for_cell. check for keyboard input
6728 but don't run any timers.
6729 ??? (It seems wrong to me to check for keyboard
6730 input at all when wait_for_cell, but the code
6731 has been this way since July 1994.
6732 Try changing this after version 19.31.) */
6733 if (! NILP (wait_for_cell
)
6734 && detect_input_pending ())
6736 swallow_events (do_display
);
6737 if (detect_input_pending ())
6741 /* Exit now if the cell we're waiting for became non-nil. */
6742 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6751 #endif /* not subprocesses */
6753 /* The following functions are needed even if async subprocesses are
6754 not supported. Some of them are no-op stubs in that case. */
6756 /* Add DESC to the set of keyboard input descriptors. */
6759 add_keyboard_wait_descriptor (int desc
)
6761 #ifdef subprocesses /* actually means "not MSDOS" */
6762 FD_SET (desc
, &input_wait_mask
);
6763 FD_SET (desc
, &non_process_wait_mask
);
6764 if (desc
> max_input_desc
)
6765 max_input_desc
= desc
;
6769 /* From now on, do not expect DESC to give keyboard input. */
6772 delete_keyboard_wait_descriptor (int desc
)
6776 int lim
= max_input_desc
;
6778 FD_CLR (desc
, &input_wait_mask
);
6779 FD_CLR (desc
, &non_process_wait_mask
);
6781 if (desc
== max_input_desc
)
6782 for (fd
= 0; fd
< lim
; fd
++)
6783 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
6784 max_input_desc
= fd
;
6788 /* Setup coding systems of PROCESS. */
6791 setup_process_coding_systems (Lisp_Object process
)
6794 struct Lisp_Process
*p
= XPROCESS (process
);
6796 int outch
= p
->outfd
;
6797 Lisp_Object coding_system
;
6799 if (inch
< 0 || outch
< 0)
6802 if (!proc_decode_coding_system
[inch
])
6803 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
6804 coding_system
= p
->decode_coding_system
;
6805 if (! NILP (p
->filter
))
6807 else if (BUFFERP (p
->buffer
))
6809 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
6810 coding_system
= raw_text_coding_system (coding_system
);
6812 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
6814 if (!proc_encode_coding_system
[outch
])
6815 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
6816 setup_coding_system (p
->encode_coding_system
,
6817 proc_encode_coding_system
[outch
]);
6821 /* Close all descriptors currently in use for communication
6822 with subprocess. This is used in a newly-forked subprocess
6823 to get rid of irrelevant descriptors. */
6826 close_process_descs (void)
6830 for (i
= 0; i
< MAXDESC
; i
++)
6832 Lisp_Object process
;
6833 process
= chan_process
[i
];
6834 if (!NILP (process
))
6836 int in
= XPROCESS (process
)->infd
;
6837 int out
= XPROCESS (process
)->outfd
;
6840 if (out
>= 0 && in
!= out
)
6847 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
6848 doc
: /* Return the (or a) process associated with BUFFER.
6849 BUFFER may be a buffer or the name of one. */)
6850 (register Lisp_Object buffer
)
6853 register Lisp_Object buf
, tail
, proc
;
6855 if (NILP (buffer
)) return Qnil
;
6856 buf
= Fget_buffer (buffer
);
6857 if (NILP (buf
)) return Qnil
;
6859 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6861 proc
= Fcdr (XCAR (tail
));
6862 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
6865 #endif /* subprocesses */
6869 DEFUN ("process-inherit-coding-system-flag",
6870 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
6872 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
6873 If this flag is t, `buffer-file-coding-system' of the buffer
6874 associated with PROCESS will inherit the coding system used to decode
6875 the process output. */)
6876 (register Lisp_Object process
)
6879 CHECK_PROCESS (process
);
6880 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
6882 /* Ignore the argument and return the value of
6883 inherit-process-coding-system. */
6884 return inherit_process_coding_system
? Qt
: Qnil
;
6888 /* Kill all processes associated with `buffer'.
6889 If `buffer' is nil, kill all processes */
6892 kill_buffer_processes (Lisp_Object buffer
)
6895 Lisp_Object tail
, proc
;
6897 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6899 proc
= XCDR (XCAR (tail
));
6901 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6903 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
6904 Fdelete_process (proc
);
6905 else if (XPROCESS (proc
)->infd
>= 0)
6906 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6909 #else /* subprocesses */
6910 /* Since we have no subprocesses, this does nothing. */
6911 #endif /* subprocesses */
6914 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
6915 Swaiting_for_user_input_p
, 0, 0, 0,
6916 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
6917 This is intended for use by asynchronous process output filters and sentinels. */)
6921 return (waiting_for_user_input_p
? Qt
: Qnil
);
6927 /* Stop reading input from keyboard sources. */
6930 hold_keyboard_input (void)
6935 /* Resume reading input from keyboard sources. */
6938 unhold_keyboard_input (void)
6943 /* Return non-zero if keyboard input is on hold, zero otherwise. */
6946 kbd_on_hold_p (void)
6948 return kbd_is_on_hold
;
6952 /* Enumeration of and access to system processes a-la ps(1). */
6954 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
6956 doc
: /* Return a list of numerical process IDs of all running processes.
6957 If this functionality is unsupported, return nil.
6959 See `process-attributes' for getting attributes of a process given its ID. */)
6962 return list_system_processes ();
6965 DEFUN ("process-attributes", Fprocess_attributes
,
6966 Sprocess_attributes
, 1, 1, 0,
6967 doc
: /* Return attributes of the process given by its PID, a number.
6969 Value is an alist where each element is a cons cell of the form
6973 If this functionality is unsupported, the value is nil.
6975 See `list-system-processes' for getting a list of all process IDs.
6977 The KEYs of the attributes that this function may return are listed
6978 below, together with the type of the associated VALUE (in parentheses).
6979 Not all platforms support all of these attributes; unsupported
6980 attributes will not appear in the returned alist.
6981 Unless explicitly indicated otherwise, numbers can have either
6982 integer or floating point values.
6984 euid -- Effective user User ID of the process (number)
6985 user -- User name corresponding to euid (string)
6986 egid -- Effective user Group ID of the process (number)
6987 group -- Group name corresponding to egid (string)
6988 comm -- Command name (executable name only) (string)
6989 state -- Process state code, such as "S", "R", or "T" (string)
6990 ppid -- Parent process ID (number)
6991 pgrp -- Process group ID (number)
6992 sess -- Session ID, i.e. process ID of session leader (number)
6993 ttname -- Controlling tty name (string)
6994 tpgid -- ID of foreground process group on the process's tty (number)
6995 minflt -- number of minor page faults (number)
6996 majflt -- number of major page faults (number)
6997 cminflt -- cumulative number of minor page faults (number)
6998 cmajflt -- cumulative number of major page faults (number)
6999 utime -- user time used by the process, in (current-time) format,
7000 which is a list of integers (HIGH LOW USEC PSEC)
7001 stime -- system time used by the process (current-time)
7002 time -- sum of utime and stime (current-time)
7003 cutime -- user time used by the process and its children (current-time)
7004 cstime -- system time used by the process and its children (current-time)
7005 ctime -- sum of cutime and cstime (current-time)
7006 pri -- priority of the process (number)
7007 nice -- nice value of the process (number)
7008 thcount -- process thread count (number)
7009 start -- time the process started (current-time)
7010 vsize -- virtual memory size of the process in KB's (number)
7011 rss -- resident set size of the process in KB's (number)
7012 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7013 pcpu -- percents of CPU time used by the process (floating-point number)
7014 pmem -- percents of total physical memory used by process's resident set
7015 (floating-point number)
7016 args -- command line which invoked the process (string). */)
7019 return system_process_attributes (pid
);
7023 /* This is not called "init_process" because that is the name of a
7024 Mach system call, so it would cause problems on Darwin systems. */
7026 init_process_emacs (void)
7031 inhibit_sentinels
= 0;
7034 if (! noninteractive
|| initialized
)
7037 struct sigaction action
;
7038 emacs_sigaction_init (&action
, deliver_child_signal
);
7039 sigaction (SIGCHLD
, &action
, 0);
7042 FD_ZERO (&input_wait_mask
);
7043 FD_ZERO (&non_keyboard_wait_mask
);
7044 FD_ZERO (&non_process_wait_mask
);
7045 FD_ZERO (&write_mask
);
7046 max_process_desc
= 0;
7047 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7049 #ifdef NON_BLOCKING_CONNECT
7050 FD_ZERO (&connect_wait_mask
);
7051 num_pending_connects
= 0;
7054 #ifdef ADAPTIVE_READ_BUFFERING
7055 process_output_delay_count
= 0;
7056 process_output_skip
= 0;
7059 /* Don't do this, it caused infinite select loops. The display
7060 method should call add_keyboard_wait_descriptor on stdin if it
7063 FD_SET (0, &input_wait_mask
);
7066 Vprocess_alist
= Qnil
;
7067 deleted_pid_list
= Qnil
;
7068 for (i
= 0; i
< MAXDESC
; i
++)
7070 chan_process
[i
] = Qnil
;
7071 proc_buffered_char
[i
] = -1;
7073 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7074 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7075 #ifdef DATAGRAM_SOCKETS
7076 memset (datagram_address
, 0, sizeof datagram_address
);
7080 Lisp_Object subfeatures
= Qnil
;
7081 const struct socket_options
*sopt
;
7083 #define ADD_SUBFEATURE(key, val) \
7084 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7086 #ifdef NON_BLOCKING_CONNECT
7087 ADD_SUBFEATURE (QCnowait
, Qt
);
7089 #ifdef DATAGRAM_SOCKETS
7090 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7092 #ifdef HAVE_SEQPACKET
7093 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7095 #ifdef HAVE_LOCAL_SOCKETS
7096 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7098 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7100 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7102 #ifdef HAVE_GETSOCKNAME
7103 ADD_SUBFEATURE (QCservice
, Qt
);
7105 ADD_SUBFEATURE (QCserver
, Qt
);
7107 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7108 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7110 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7113 #if defined (DARWIN_OS)
7114 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7115 processes. As such, we only change the default value. */
7118 char const *release
= (STRINGP (Voperating_system_release
)
7119 ? SSDATA (Voperating_system_release
)
7121 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7122 Vprocess_connection_type
= Qnil
;
7126 #endif /* subprocesses */
7131 syms_of_process (void)
7135 DEFSYM (Qprocessp
, "processp");
7136 DEFSYM (Qrun
, "run");
7137 DEFSYM (Qstop
, "stop");
7138 DEFSYM (Qsignal
, "signal");
7140 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7143 Qexit = intern_c_string ("exit");
7144 staticpro (&Qexit); */
7146 DEFSYM (Qopen
, "open");
7147 DEFSYM (Qclosed
, "closed");
7148 DEFSYM (Qconnect
, "connect");
7149 DEFSYM (Qfailed
, "failed");
7150 DEFSYM (Qlisten
, "listen");
7151 DEFSYM (Qlocal
, "local");
7152 DEFSYM (Qipv4
, "ipv4");
7154 DEFSYM (Qipv6
, "ipv6");
7156 DEFSYM (Qdatagram
, "datagram");
7157 DEFSYM (Qseqpacket
, "seqpacket");
7159 DEFSYM (QCport
, ":port");
7160 DEFSYM (QCspeed
, ":speed");
7161 DEFSYM (QCprocess
, ":process");
7163 DEFSYM (QCbytesize
, ":bytesize");
7164 DEFSYM (QCstopbits
, ":stopbits");
7165 DEFSYM (QCparity
, ":parity");
7166 DEFSYM (Qodd
, "odd");
7167 DEFSYM (Qeven
, "even");
7168 DEFSYM (QCflowcontrol
, ":flowcontrol");
7171 DEFSYM (QCsummary
, ":summary");
7173 DEFSYM (Qreal
, "real");
7174 DEFSYM (Qnetwork
, "network");
7175 DEFSYM (Qserial
, "serial");
7176 DEFSYM (QCbuffer
, ":buffer");
7177 DEFSYM (QChost
, ":host");
7178 DEFSYM (QCservice
, ":service");
7179 DEFSYM (QClocal
, ":local");
7180 DEFSYM (QCremote
, ":remote");
7181 DEFSYM (QCcoding
, ":coding");
7182 DEFSYM (QCserver
, ":server");
7183 DEFSYM (QCnowait
, ":nowait");
7184 DEFSYM (QCsentinel
, ":sentinel");
7185 DEFSYM (QClog
, ":log");
7186 DEFSYM (QCnoquery
, ":noquery");
7187 DEFSYM (QCstop
, ":stop");
7188 DEFSYM (QCoptions
, ":options");
7189 DEFSYM (QCplist
, ":plist");
7191 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7193 staticpro (&Vprocess_alist
);
7194 staticpro (&deleted_pid_list
);
7196 #endif /* subprocesses */
7198 DEFSYM (QCname
, ":name");
7199 DEFSYM (QCtype
, ":type");
7201 DEFSYM (Qeuid
, "euid");
7202 DEFSYM (Qegid
, "egid");
7203 DEFSYM (Quser
, "user");
7204 DEFSYM (Qgroup
, "group");
7205 DEFSYM (Qcomm
, "comm");
7206 DEFSYM (Qstate
, "state");
7207 DEFSYM (Qppid
, "ppid");
7208 DEFSYM (Qpgrp
, "pgrp");
7209 DEFSYM (Qsess
, "sess");
7210 DEFSYM (Qttname
, "ttname");
7211 DEFSYM (Qtpgid
, "tpgid");
7212 DEFSYM (Qminflt
, "minflt");
7213 DEFSYM (Qmajflt
, "majflt");
7214 DEFSYM (Qcminflt
, "cminflt");
7215 DEFSYM (Qcmajflt
, "cmajflt");
7216 DEFSYM (Qutime
, "utime");
7217 DEFSYM (Qstime
, "stime");
7218 DEFSYM (Qtime
, "time");
7219 DEFSYM (Qcutime
, "cutime");
7220 DEFSYM (Qcstime
, "cstime");
7221 DEFSYM (Qctime
, "ctime");
7222 DEFSYM (Qpri
, "pri");
7223 DEFSYM (Qnice
, "nice");
7224 DEFSYM (Qthcount
, "thcount");
7225 DEFSYM (Qstart
, "start");
7226 DEFSYM (Qvsize
, "vsize");
7227 DEFSYM (Qrss
, "rss");
7228 DEFSYM (Qetime
, "etime");
7229 DEFSYM (Qpcpu
, "pcpu");
7230 DEFSYM (Qpmem
, "pmem");
7231 DEFSYM (Qargs
, "args");
7233 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7234 doc
: /* Non-nil means delete processes immediately when they exit.
7235 A value of nil means don't delete them until `list-processes' is run. */);
7237 delete_exited_processes
= 1;
7240 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7241 doc
: /* Control type of device used to communicate with subprocesses.
7242 Values are nil to use a pipe, or t or `pty' to use a pty.
7243 The value has no effect if the system has no ptys or if all ptys are busy:
7244 then a pipe is used in any case.
7245 The value takes effect when `start-process' is called. */);
7246 Vprocess_connection_type
= Qt
;
7248 #ifdef ADAPTIVE_READ_BUFFERING
7249 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7250 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7251 On some systems, when Emacs reads the output from a subprocess, the output data
7252 is read in very small blocks, potentially resulting in very poor performance.
7253 This behavior can be remedied to some extent by setting this variable to a
7254 non-nil value, as it will automatically delay reading from such processes, to
7255 allow them to produce more output before Emacs tries to read it.
7256 If the value is t, the delay is reset after each write to the process; any other
7257 non-nil value means that the delay is not reset on write.
7258 The variable takes effect when `start-process' is called. */);
7259 Vprocess_adaptive_read_buffering
= Qt
;
7262 defsubr (&Sprocessp
);
7263 defsubr (&Sget_process
);
7264 defsubr (&Sdelete_process
);
7265 defsubr (&Sprocess_status
);
7266 defsubr (&Sprocess_exit_status
);
7267 defsubr (&Sprocess_id
);
7268 defsubr (&Sprocess_name
);
7269 defsubr (&Sprocess_tty_name
);
7270 defsubr (&Sprocess_command
);
7271 defsubr (&Sset_process_buffer
);
7272 defsubr (&Sprocess_buffer
);
7273 defsubr (&Sprocess_mark
);
7274 defsubr (&Sset_process_filter
);
7275 defsubr (&Sprocess_filter
);
7276 defsubr (&Sset_process_sentinel
);
7277 defsubr (&Sprocess_sentinel
);
7278 defsubr (&Sset_process_window_size
);
7279 defsubr (&Sset_process_inherit_coding_system_flag
);
7280 defsubr (&Sset_process_query_on_exit_flag
);
7281 defsubr (&Sprocess_query_on_exit_flag
);
7282 defsubr (&Sprocess_contact
);
7283 defsubr (&Sprocess_plist
);
7284 defsubr (&Sset_process_plist
);
7285 defsubr (&Sprocess_list
);
7286 defsubr (&Sstart_process
);
7287 defsubr (&Sserial_process_configure
);
7288 defsubr (&Smake_serial_process
);
7289 defsubr (&Sset_network_process_option
);
7290 defsubr (&Smake_network_process
);
7291 defsubr (&Sformat_network_address
);
7292 #if defined (HAVE_NET_IF_H)
7294 defsubr (&Snetwork_interface_list
);
7296 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7297 defsubr (&Snetwork_interface_info
);
7299 #endif /* defined (HAVE_NET_IF_H) */
7300 #ifdef DATAGRAM_SOCKETS
7301 defsubr (&Sprocess_datagram_address
);
7302 defsubr (&Sset_process_datagram_address
);
7304 defsubr (&Saccept_process_output
);
7305 defsubr (&Sprocess_send_region
);
7306 defsubr (&Sprocess_send_string
);
7307 defsubr (&Sinterrupt_process
);
7308 defsubr (&Skill_process
);
7309 defsubr (&Squit_process
);
7310 defsubr (&Sstop_process
);
7311 defsubr (&Scontinue_process
);
7312 defsubr (&Sprocess_running_child_p
);
7313 defsubr (&Sprocess_send_eof
);
7314 defsubr (&Ssignal_process
);
7315 defsubr (&Swaiting_for_user_input_p
);
7316 defsubr (&Sprocess_type
);
7317 defsubr (&Sset_process_coding_system
);
7318 defsubr (&Sprocess_coding_system
);
7319 defsubr (&Sset_process_filter_multibyte
);
7320 defsubr (&Sprocess_filter_multibyte_p
);
7322 #endif /* subprocesses */
7324 defsubr (&Sget_buffer_process
);
7325 defsubr (&Sprocess_inherit_coding_system_flag
);
7326 defsubr (&Slist_system_processes
);
7327 defsubr (&Sprocess_attributes
);