1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2012
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
37 /* Only MS-DOS does not define `subprocesses'. */
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
45 /* Are local (unix) sockets supported? */
46 #if defined (HAVE_SYS_UN_H)
47 #if !defined (AF_LOCAL) && defined (AF_UNIX)
48 #define AF_LOCAL AF_UNIX
51 #define HAVE_LOCAL_SOCKETS
56 #include <sys/ioctl.h>
57 #if defined (HAVE_NET_IF_H)
59 #endif /* HAVE_NET_IF_H */
61 #if defined (HAVE_IFADDRS_H)
62 /* Must be after net/if.h */
65 /* We only use structs from this header when we use getifaddrs. */
66 #if defined (HAVE_NET_IF_DL_H)
67 #include <net/if_dl.h>
77 #include <netinet/in.h>
78 #include <arpa/nameser.h>
90 #endif /* subprocesses */
97 #include "character.h"
101 #include "termhooks.h"
102 #include "termopts.h"
103 #include "commands.h"
104 #include "keyboard.h"
105 #include "blockinput.h"
106 #include "dispextern.h"
107 #include "composite.h"
109 #include "sysselect.h"
110 #include "syssignal.h"
116 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
117 #include "xgselect.h"
123 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
124 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
125 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
126 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
127 Lisp_Object QCname
, QCtype
;
129 /* Non-zero if keyboard input is on hold, zero otherwise. */
131 static int kbd_is_on_hold
;
133 /* Nonzero means don't run process sentinels. This is used
135 int inhibit_sentinels
;
139 Lisp_Object Qprocessp
;
140 static Lisp_Object Qrun
, Qstop
, Qsignal
;
141 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
143 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
144 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
146 static Lisp_Object Qipv6
;
148 static Lisp_Object QCport
, QCprocess
;
150 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
151 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
152 static Lisp_Object QCbuffer
, QChost
, QCservice
;
153 static Lisp_Object QClocal
, QCremote
, QCcoding
;
154 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
155 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
156 static Lisp_Object Qlast_nonmenu_event
;
157 /* QCfamily is declared and initialized in xfaces.c,
158 QCfilter in keyboard.c. */
159 extern Lisp_Object QCfamily
, QCfilter
;
161 /* Qexit is declared and initialized in eval.c. */
163 /* QCfamily is defined in xfaces.c. */
164 extern Lisp_Object QCfamily
;
165 /* QCfilter is defined in keyboard.c. */
166 extern Lisp_Object QCfilter
;
168 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
169 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
170 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
171 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
177 /* Number of events of change of status of a process. */
178 static int process_tick
;
179 /* Number of events for which the user or sentinel has been notified. */
180 static int update_tick
;
182 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
184 /* Only W32 has this, it really means that select can't take write mask. */
185 #ifdef BROKEN_NON_BLOCKING_CONNECT
186 #undef NON_BLOCKING_CONNECT
187 #define SELECT_CANT_DO_WRITE_MASK
189 #ifndef NON_BLOCKING_CONNECT
191 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
192 #if defined (O_NONBLOCK) || defined (O_NDELAY)
193 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
194 #define NON_BLOCKING_CONNECT
195 #endif /* EWOULDBLOCK || EINPROGRESS */
196 #endif /* O_NONBLOCK || O_NDELAY */
197 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
198 #endif /* HAVE_SELECT */
199 #endif /* NON_BLOCKING_CONNECT */
200 #endif /* BROKEN_NON_BLOCKING_CONNECT */
202 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
203 this system. We need to read full packets, so we need a
204 "non-destructive" select. So we require either native select,
205 or emulation of select using FIONREAD. */
207 #ifdef BROKEN_DATAGRAM_SOCKETS
208 #undef DATAGRAM_SOCKETS
210 #ifndef DATAGRAM_SOCKETS
211 #if defined (HAVE_SELECT) || defined (FIONREAD)
212 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
213 #define DATAGRAM_SOCKETS
214 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
215 #endif /* HAVE_SELECT || FIONREAD */
216 #endif /* DATAGRAM_SOCKETS */
217 #endif /* BROKEN_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 #ifdef EMACS_HAS_USECS
225 #define ADAPTIVE_READ_BUFFERING
229 #ifdef ADAPTIVE_READ_BUFFERING
230 #define READ_OUTPUT_DELAY_INCREMENT 10000
231 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
232 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
234 /* Number of processes which have a non-zero read_output_delay,
235 and therefore might be delayed for adaptive read buffering. */
237 static int process_output_delay_count
;
239 /* Non-zero if any process has non-nil read_output_skip. */
241 static int process_output_skip
;
244 #define process_output_delay_count 0
247 static Lisp_Object
Fget_process (Lisp_Object
);
248 static void create_process (Lisp_Object
, char **, Lisp_Object
);
250 static int keyboard_bit_set (SELECT_TYPE
*);
252 static void deactivate_process (Lisp_Object
);
253 static void status_notify (struct Lisp_Process
*);
254 static int read_process_output (Lisp_Object
, int);
255 static void create_pty (Lisp_Object
);
257 /* If we support a window system, turn on the code to poll periodically
258 to detect C-g. It isn't actually used when doing interrupt input. */
259 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
260 #define POLL_FOR_INPUT
263 static Lisp_Object
get_process (register Lisp_Object name
);
264 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
266 /* Mask of bits indicating the descriptors that we wait for input on. */
268 static SELECT_TYPE input_wait_mask
;
270 /* Mask that excludes keyboard input descriptor(s). */
272 static SELECT_TYPE non_keyboard_wait_mask
;
274 /* Mask that excludes process input descriptor(s). */
276 static SELECT_TYPE non_process_wait_mask
;
278 /* Mask for selecting for write. */
280 static SELECT_TYPE write_mask
;
282 #ifdef NON_BLOCKING_CONNECT
283 /* Mask of bits indicating the descriptors that we wait for connect to
284 complete on. Once they complete, they are removed from this mask
285 and added to the input_wait_mask and non_keyboard_wait_mask. */
287 static SELECT_TYPE connect_wait_mask
;
289 /* Number of bits set in connect_wait_mask. */
290 static int num_pending_connects
;
291 #endif /* NON_BLOCKING_CONNECT */
293 /* The largest descriptor currently in use for a process object. */
294 static int max_process_desc
;
296 /* The largest descriptor currently in use for input. */
297 static int max_input_desc
;
299 /* Indexed by descriptor, gives the process (if any) for that descriptor */
300 static Lisp_Object chan_process
[MAXDESC
];
302 /* Alist of elements (NAME . PROCESS) */
303 static Lisp_Object Vprocess_alist
;
305 /* Buffered-ahead input char from process, indexed by channel.
306 -1 means empty (no char is buffered).
307 Used on sys V where the only way to tell if there is any
308 output from the process is to read at least one char.
309 Always -1 on systems that support FIONREAD. */
311 static int proc_buffered_char
[MAXDESC
];
313 /* Table of `struct coding-system' for each process. */
314 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
315 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
317 #ifdef DATAGRAM_SOCKETS
318 /* Table of `partner address' for datagram sockets. */
319 static struct sockaddr_and_len
{
322 } datagram_address
[MAXDESC
];
323 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
324 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
326 #define DATAGRAM_CHAN_P(chan) (0)
327 #define DATAGRAM_CONN_P(proc) (0)
330 /* Maximum number of bytes to send to a pty without an eof. */
331 static int pty_max_bytes
;
335 static struct fd_callback_data
341 int condition
; /* mask of the defines above. */
342 } fd_callback_info
[MAXDESC
];
345 /* Add a file descriptor FD to be monitored for when read is possible.
346 When read is possible, call FUNC with argument DATA. */
349 add_read_fd (int fd
, fd_callback func
, void *data
)
351 xassert (fd
< MAXDESC
);
352 add_keyboard_wait_descriptor (fd
);
354 fd_callback_info
[fd
].func
= func
;
355 fd_callback_info
[fd
].data
= data
;
356 fd_callback_info
[fd
].condition
|= FOR_READ
;
359 /* Stop monitoring file descriptor FD for when read is possible. */
362 delete_read_fd (int fd
)
364 xassert (fd
< MAXDESC
);
365 delete_keyboard_wait_descriptor (fd
);
367 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
368 if (fd_callback_info
[fd
].condition
== 0)
370 fd_callback_info
[fd
].func
= 0;
371 fd_callback_info
[fd
].data
= 0;
375 /* Add a file descriptor FD to be monitored for when write is possible.
376 When write is possible, call FUNC with argument DATA. */
379 add_write_fd (int fd
, fd_callback func
, void *data
)
381 xassert (fd
< MAXDESC
);
382 FD_SET (fd
, &write_mask
);
383 if (fd
> max_input_desc
)
386 fd_callback_info
[fd
].func
= func
;
387 fd_callback_info
[fd
].data
= data
;
388 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
391 /* Stop monitoring file descriptor FD for when write is possible. */
394 delete_write_fd (int fd
)
396 int lim
= max_input_desc
;
398 xassert (fd
< MAXDESC
);
399 FD_CLR (fd
, &write_mask
);
400 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
401 if (fd_callback_info
[fd
].condition
== 0)
403 fd_callback_info
[fd
].func
= 0;
404 fd_callback_info
[fd
].data
= 0;
406 if (fd
== max_input_desc
)
407 for (fd
= lim
; fd
>= 0; fd
--)
408 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
418 /* Compute the Lisp form of the process status, p->status, from
419 the numeric status that was returned by `wait'. */
421 static Lisp_Object
status_convert (int);
424 update_status (struct Lisp_Process
*p
)
426 eassert (p
->raw_status_new
);
427 p
->status
= status_convert (p
->raw_status
);
428 p
->raw_status_new
= 0;
431 /* Convert a process status word in Unix format to
432 the list that we use internally. */
435 status_convert (int w
)
438 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
439 else if (WIFEXITED (w
))
440 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
441 WCOREDUMP (w
) ? Qt
: Qnil
));
442 else if (WIFSIGNALED (w
))
443 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
444 WCOREDUMP (w
) ? Qt
: Qnil
));
449 /* Given a status-list, extract the three pieces of information
450 and store them individually through the three pointers. */
453 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
467 *code
= XFASTINT (XCAR (tem
));
469 *coredump
= !NILP (tem
);
473 /* Return a string describing a process status list. */
476 status_message (struct Lisp_Process
*p
)
478 Lisp_Object status
= p
->status
;
481 Lisp_Object string
, string2
;
483 decode_status (status
, &symbol
, &code
, &coredump
);
485 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
488 synchronize_system_messages_locale ();
489 signame
= strsignal (code
);
491 string
= build_string ("unknown");
496 string
= make_unibyte_string (signame
, strlen (signame
));
497 if (! NILP (Vlocale_coding_system
))
498 string
= (code_convert_string_norecord
499 (string
, Vlocale_coding_system
, 0));
500 c1
= STRING_CHAR (SDATA (string
));
503 Faset (string
, make_number (0), make_number (c2
));
505 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
506 return concat2 (string
, string2
);
508 else if (EQ (symbol
, Qexit
))
511 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
513 return build_string ("finished\n");
514 string
= Fnumber_to_string (make_number (code
));
515 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
516 return concat3 (build_string ("exited abnormally with code "),
519 else if (EQ (symbol
, Qfailed
))
521 string
= Fnumber_to_string (make_number (code
));
522 string2
= build_string ("\n");
523 return concat3 (build_string ("failed with code "),
527 return Fcopy_sequence (Fsymbol_name (symbol
));
532 /* The file name of the pty opened by allocate_pty. */
533 static char pty_name
[24];
535 /* Open an available pty, returning a file descriptor.
536 Return -1 on failure.
537 The file name of the terminal corresponding to the pty
538 is left in the variable pty_name. */
549 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
550 for (i
= 0; i
< 16; i
++)
553 #ifdef PTY_NAME_SPRINTF
556 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
557 #endif /* no PTY_NAME_SPRINTF */
561 #else /* no PTY_OPEN */
563 { /* Some systems name their pseudoterminals so that there are gaps in
564 the usual sequence - for example, on HP9000/S700 systems, there
565 are no pseudoterminals with names ending in 'f'. So we wait for
566 three failures in a row before deciding that we've reached the
568 int failed_count
= 0;
571 if (stat (pty_name
, &stb
) < 0)
574 if (failed_count
>= 3)
581 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
583 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
586 #endif /* no PTY_OPEN */
590 /* check to make certain that both sides are available
591 this avoids a nasty yet stupid bug in rlogins */
592 #ifdef PTY_TTY_NAME_SPRINTF
595 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
596 #endif /* no PTY_TTY_NAME_SPRINTF */
597 if (access (pty_name
, 6) != 0)
612 #endif /* HAVE_PTYS */
615 make_process (Lisp_Object name
)
617 register Lisp_Object val
, tem
, name1
;
618 register struct Lisp_Process
*p
;
619 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
622 p
= allocate_process ();
630 p
->raw_status_new
= 0;
632 p
->mark
= Fmake_marker ();
633 p
->kill_without_query
= 0;
635 #ifdef ADAPTIVE_READ_BUFFERING
636 p
->adaptive_read_buffering
= 0;
637 p
->read_output_delay
= 0;
638 p
->read_output_skip
= 0;
642 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
643 /* Default log level. */
644 p
->gnutls_log_level
= 0;
645 /* GnuTLS handshakes attempted for this connection. */
646 p
->gnutls_handshakes_tried
= 0;
648 p
->gnutls_state
= NULL
;
649 p
->gnutls_x509_cred
= NULL
;
650 p
->gnutls_anon_cred
= NULL
;
653 /* If name is already in use, modify it until it is unused. */
658 tem
= Fget_process (name1
);
659 if (NILP (tem
)) break;
660 sprintf (suffix
, "<%"pMd
">", i
);
661 name1
= concat2 (name
, build_string (suffix
));
665 XSETPROCESS (val
, p
);
666 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
671 remove_process (register Lisp_Object proc
)
673 register Lisp_Object pair
;
675 pair
= Frassq (proc
, Vprocess_alist
);
676 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
678 deactivate_process (proc
);
682 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
683 doc
: /* Return t if OBJECT is a process. */)
686 return PROCESSP (object
) ? Qt
: Qnil
;
689 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
690 doc
: /* Return the process named NAME, or nil if there is none. */)
691 (register Lisp_Object name
)
696 return Fcdr (Fassoc (name
, Vprocess_alist
));
699 /* This is how commands for the user decode process arguments. It
700 accepts a process, a process name, a buffer, a buffer name, or nil.
701 Buffers denote the first process in the buffer, and nil denotes the
705 get_process (register Lisp_Object name
)
707 register Lisp_Object proc
, obj
;
710 obj
= Fget_process (name
);
712 obj
= Fget_buffer (name
);
714 error ("Process %s does not exist", SDATA (name
));
716 else if (NILP (name
))
717 obj
= Fcurrent_buffer ();
721 /* Now obj should be either a buffer object or a process object.
725 proc
= Fget_buffer_process (obj
);
727 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
739 /* Fdelete_process promises to immediately forget about the process, but in
740 reality, Emacs needs to remember those processes until they have been
741 treated by sigchld_handler; otherwise this handler would consider the
742 process as being synchronous and say that the synchronous process is
744 static Lisp_Object deleted_pid_list
;
747 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
748 doc
: /* Delete PROCESS: kill it and forget about it immediately.
749 PROCESS may be a process, a buffer, the name of a process or buffer, or
750 nil, indicating the current buffer's process. */)
751 (register Lisp_Object process
)
753 register struct Lisp_Process
*p
;
755 process
= get_process (process
);
756 p
= XPROCESS (process
);
758 p
->raw_status_new
= 0;
759 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
761 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
762 p
->tick
= ++process_tick
;
764 redisplay_preserve_echo_area (13);
766 else if (p
->infd
>= 0)
770 /* Assignment to EMACS_INT stops GCC whining about limited range
772 EMACS_INT pid
= p
->pid
;
774 /* No problem storing the pid here, as it is still in Vprocess_alist. */
775 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
776 /* GC treated elements set to nil. */
777 Fdelq (Qnil
, deleted_pid_list
));
778 /* If the process has already signaled, remove it from the list. */
779 if (p
->raw_status_new
)
782 if (CONSP (p
->status
))
783 symbol
= XCAR (p
->status
);
784 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
786 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
790 Fkill_process (process
, Qnil
);
791 /* Do this now, since remove_process will make sigchld_handler do nothing. */
793 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
794 p
->tick
= ++process_tick
;
796 redisplay_preserve_echo_area (13);
799 remove_process (process
);
803 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
804 doc
: /* Return the status of PROCESS.
805 The returned value is one of the following symbols:
806 run -- for a process that is running.
807 stop -- for a process stopped but continuable.
808 exit -- for a process that has exited.
809 signal -- for a process that has got a fatal signal.
810 open -- for a network stream connection that is open.
811 listen -- for a network stream server that is listening.
812 closed -- for a network stream connection that is closed.
813 connect -- when waiting for a non-blocking connection to complete.
814 failed -- when a non-blocking connection has failed.
815 nil -- if arg is a process name and no such process exists.
816 PROCESS may be a process, a buffer, the name of a process, or
817 nil, indicating the current buffer's process. */)
818 (register Lisp_Object process
)
820 register struct Lisp_Process
*p
;
821 register Lisp_Object status
;
823 if (STRINGP (process
))
824 process
= Fget_process (process
);
826 process
= get_process (process
);
831 p
= XPROCESS (process
);
832 if (p
->raw_status_new
)
836 status
= XCAR (status
);
837 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
839 if (EQ (status
, Qexit
))
841 else if (EQ (p
->command
, Qt
))
843 else if (EQ (status
, Qrun
))
849 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
851 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
852 If PROCESS has not yet exited or died, return 0. */)
853 (register Lisp_Object process
)
855 CHECK_PROCESS (process
);
856 if (XPROCESS (process
)->raw_status_new
)
857 update_status (XPROCESS (process
));
858 if (CONSP (XPROCESS (process
)->status
))
859 return XCAR (XCDR (XPROCESS (process
)->status
));
860 return make_number (0);
863 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
864 doc
: /* Return the process id of PROCESS.
865 This is the pid of the external process which PROCESS uses or talks to.
866 For a network connection, this value is nil. */)
867 (register Lisp_Object process
)
869 /* Assignment to EMACS_INT stops GCC whining about limited range of
873 CHECK_PROCESS (process
);
874 pid
= XPROCESS (process
)->pid
;
875 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
878 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
879 doc
: /* Return the name of PROCESS, as a string.
880 This is the name of the program invoked in PROCESS,
881 possibly modified to make it unique among process names. */)
882 (register Lisp_Object process
)
884 CHECK_PROCESS (process
);
885 return XPROCESS (process
)->name
;
888 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
889 doc
: /* Return the command that was executed to start PROCESS.
890 This is a list of strings, the first string being the program executed
891 and the rest of the strings being the arguments given to it.
892 For a network or serial process, this is nil (process is running) or t
893 \(process is stopped). */)
894 (register Lisp_Object process
)
896 CHECK_PROCESS (process
);
897 return XPROCESS (process
)->command
;
900 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
901 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
902 This is the terminal that the process itself reads and writes on,
903 not the name of the pty that Emacs uses to talk with that terminal. */)
904 (register Lisp_Object process
)
906 CHECK_PROCESS (process
);
907 return XPROCESS (process
)->tty_name
;
910 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
912 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
914 (register Lisp_Object process
, Lisp_Object buffer
)
916 struct Lisp_Process
*p
;
918 CHECK_PROCESS (process
);
920 CHECK_BUFFER (buffer
);
921 p
= XPROCESS (process
);
923 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
924 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
925 setup_process_coding_systems (process
);
929 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
931 doc
: /* Return the buffer PROCESS is associated with.
932 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
933 (register Lisp_Object process
)
935 CHECK_PROCESS (process
);
936 return XPROCESS (process
)->buffer
;
939 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
941 doc
: /* Return the marker for the end of the last output from PROCESS. */)
942 (register Lisp_Object process
)
944 CHECK_PROCESS (process
);
945 return XPROCESS (process
)->mark
;
948 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
950 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
951 A value of t means stop accepting output from the process.
953 When a process has a filter, its buffer is not used for output.
954 Instead, each time it does output, the entire string of output is
955 passed to the filter.
957 The filter gets two arguments: the process and the string of output.
958 The string argument is normally a multibyte string, except:
959 - if the process' input coding system is no-conversion or raw-text,
960 it is a unibyte string (the non-converted input), or else
961 - if `default-enable-multibyte-characters' is nil, it is a unibyte
962 string (the result of converting the decoded input multibyte
963 string to unibyte with `string-make-unibyte'). */)
964 (register Lisp_Object process
, Lisp_Object filter
)
966 struct Lisp_Process
*p
;
968 CHECK_PROCESS (process
);
969 p
= XPROCESS (process
);
971 /* Don't signal an error if the process' input file descriptor
972 is closed. This could make debugging Lisp more difficult,
973 for example when doing something like
975 (setq process (start-process ...))
977 (set-process-filter process ...) */
981 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
983 FD_CLR (p
->infd
, &input_wait_mask
);
984 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
986 else if (EQ (p
->filter
, Qt
)
987 /* Network or serial process not stopped: */
988 && !EQ (p
->command
, Qt
))
990 FD_SET (p
->infd
, &input_wait_mask
);
991 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
996 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
997 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
998 setup_process_coding_systems (process
);
1002 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1004 doc
: /* Returns the filter function of PROCESS; nil if none.
1005 See `set-process-filter' for more info on filter functions. */)
1006 (register Lisp_Object process
)
1008 CHECK_PROCESS (process
);
1009 return XPROCESS (process
)->filter
;
1012 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1014 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1015 The sentinel is called as a function when the process changes state.
1016 It gets two arguments: the process, and a string describing the change. */)
1017 (register Lisp_Object process
, Lisp_Object sentinel
)
1019 struct Lisp_Process
*p
;
1021 CHECK_PROCESS (process
);
1022 p
= XPROCESS (process
);
1024 p
->sentinel
= sentinel
;
1025 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1026 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1030 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1032 doc
: /* Return the sentinel of PROCESS; nil if none.
1033 See `set-process-sentinel' for more info on sentinels. */)
1034 (register Lisp_Object process
)
1036 CHECK_PROCESS (process
);
1037 return XPROCESS (process
)->sentinel
;
1040 DEFUN ("set-process-window-size", Fset_process_window_size
,
1041 Sset_process_window_size
, 3, 3, 0,
1042 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1043 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1045 CHECK_PROCESS (process
);
1046 CHECK_NATNUM (height
);
1047 CHECK_NATNUM (width
);
1049 if (XPROCESS (process
)->infd
< 0
1050 || set_window_size (XPROCESS (process
)->infd
,
1051 XINT (height
), XINT (width
)) <= 0)
1057 DEFUN ("set-process-inherit-coding-system-flag",
1058 Fset_process_inherit_coding_system_flag
,
1059 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1060 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1061 If the second argument FLAG is non-nil, then the variable
1062 `buffer-file-coding-system' of the buffer associated with PROCESS
1063 will be bound to the value of the coding system used to decode
1066 This is useful when the coding system specified for the process buffer
1067 leaves either the character code conversion or the end-of-line conversion
1068 unspecified, or if the coding system used to decode the process output
1069 is more appropriate for saving the process buffer.
1071 Binding the variable `inherit-process-coding-system' to non-nil before
1072 starting the process is an alternative way of setting the inherit flag
1073 for the process which will run. */)
1074 (register Lisp_Object process
, Lisp_Object flag
)
1076 CHECK_PROCESS (process
);
1077 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1081 DEFUN ("set-process-query-on-exit-flag",
1082 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1084 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1085 If the second argument FLAG is non-nil, Emacs will query the user before
1086 exiting or killing a buffer if PROCESS is running. */)
1087 (register Lisp_Object process
, Lisp_Object flag
)
1089 CHECK_PROCESS (process
);
1090 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1094 DEFUN ("process-query-on-exit-flag",
1095 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1097 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1098 (register Lisp_Object process
)
1100 CHECK_PROCESS (process
);
1101 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1104 #ifdef DATAGRAM_SOCKETS
1105 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1108 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1110 doc
: /* Return the contact info of PROCESS; t for a real child.
1111 For a network or serial connection, the value depends on the optional
1112 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1113 SERVICE) for a network connection or (PORT SPEED) for a serial
1114 connection. If KEY is t, the complete contact information for the
1115 connection is returned, else the specific value for the keyword KEY is
1116 returned. See `make-network-process' or `make-serial-process' for a
1117 list of keywords. */)
1118 (register Lisp_Object process
, Lisp_Object key
)
1120 Lisp_Object contact
;
1122 CHECK_PROCESS (process
);
1123 contact
= XPROCESS (process
)->childp
;
1125 #ifdef DATAGRAM_SOCKETS
1126 if (DATAGRAM_CONN_P (process
)
1127 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1128 contact
= Fplist_put (contact
, QCremote
,
1129 Fprocess_datagram_address (process
));
1132 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1134 if (NILP (key
) && NETCONN_P (process
))
1135 return Fcons (Fplist_get (contact
, QChost
),
1136 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1137 if (NILP (key
) && SERIALCONN_P (process
))
1138 return Fcons (Fplist_get (contact
, QCport
),
1139 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1140 return Fplist_get (contact
, key
);
1143 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1145 doc
: /* Return the plist of PROCESS. */)
1146 (register Lisp_Object process
)
1148 CHECK_PROCESS (process
);
1149 return XPROCESS (process
)->plist
;
1152 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1154 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1155 (register Lisp_Object process
, Lisp_Object plist
)
1157 CHECK_PROCESS (process
);
1160 XPROCESS (process
)->plist
= plist
;
1164 #if 0 /* Turned off because we don't currently record this info
1165 in the process. Perhaps add it. */
1166 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1167 doc
: /* Return the connection type of PROCESS.
1168 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1169 a socket connection. */)
1170 (Lisp_Object process
)
1172 return XPROCESS (process
)->type
;
1176 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1177 doc
: /* Return the connection type of PROCESS.
1178 The value is either the symbol `real', `network', or `serial'.
1179 PROCESS may be a process, a buffer, the name of a process or buffer, or
1180 nil, indicating the current buffer's process. */)
1181 (Lisp_Object process
)
1184 proc
= get_process (process
);
1185 return XPROCESS (proc
)->type
;
1188 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1190 doc
: /* Convert network ADDRESS from internal format to a string.
1191 A 4 or 5 element vector represents an IPv4 address (with port number).
1192 An 8 or 9 element vector represents an IPv6 address (with port number).
1193 If optional second argument OMIT-PORT is non-nil, don't include a port
1194 number in the string, even when present in ADDRESS.
1195 Returns nil if format of ADDRESS is invalid. */)
1196 (Lisp_Object address
, Lisp_Object omit_port
)
1201 if (STRINGP (address
)) /* AF_LOCAL */
1204 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1206 register struct Lisp_Vector
*p
= XVECTOR (address
);
1207 EMACS_INT size
= p
->header
.size
;
1208 Lisp_Object args
[10];
1211 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1213 args
[0] = build_string ("%d.%d.%d.%d");
1218 args
[0] = build_string ("%d.%d.%d.%d:%d");
1221 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1223 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1228 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1234 for (i
= 0; i
< nargs
; i
++)
1236 EMACS_INT element
= XINT (p
->contents
[i
]);
1238 if (element
< 0 || element
> 65535)
1241 if (nargs
<= 5 /* IPv4 */
1242 && i
< 4 /* host, not port */
1246 args
[i
+1] = p
->contents
[i
];
1249 return Fformat (nargs
+1, args
);
1252 if (CONSP (address
))
1254 Lisp_Object args
[2];
1255 args
[0] = build_string ("<Family %d>");
1256 args
[1] = Fcar (address
);
1257 return Fformat (2, args
);
1263 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1264 doc
: /* Return a list of all processes. */)
1267 return Fmapcar (Qcdr
, Vprocess_alist
);
1270 /* Starting asynchronous inferior processes. */
1272 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1274 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1275 doc
: /* Start a program in a subprocess. Return the process object for it.
1276 NAME is name for process. It is modified if necessary to make it unique.
1277 BUFFER is the buffer (or buffer name) to associate with the process.
1279 Process output (both standard output and standard error streams) goes
1280 at end of BUFFER, unless you specify an output stream or filter
1281 function to handle the output. BUFFER may also be nil, meaning that
1282 this process is not associated with any buffer.
1284 PROGRAM is the program file name. It is searched for in `exec-path'
1285 (which see). If nil, just associate a pty with the buffer. Remaining
1286 arguments are strings to give program as arguments.
1288 If you want to separate standard output from standard error, invoke
1289 the command through a shell and redirect one of them using the shell
1292 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1293 (ptrdiff_t nargs
, Lisp_Object
*args
)
1295 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1296 register unsigned char **new_argv
;
1298 int count
= SPECPDL_INDEX ();
1302 buffer
= Fget_buffer_create (buffer
);
1304 /* Make sure that the child will be able to chdir to the current
1305 buffer's current directory, or its unhandled equivalent. We
1306 can't just have the child check for an error when it does the
1307 chdir, since it's in a vfork.
1309 We have to GCPRO around this because Fexpand_file_name and
1310 Funhandled_file_name_directory might call a file name handling
1311 function. The argument list is protected by the caller, so all
1312 we really have to worry about is buffer. */
1314 struct gcpro gcpro1
, gcpro2
;
1316 current_dir
= BVAR (current_buffer
, directory
);
1318 GCPRO2 (buffer
, current_dir
);
1320 current_dir
= Funhandled_file_name_directory (current_dir
);
1321 if (NILP (current_dir
))
1322 /* If the file name handler says that current_dir is unreachable, use
1323 a sensible default. */
1324 current_dir
= build_string ("~/");
1325 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1326 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1327 report_file_error ("Setting current directory",
1328 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1334 CHECK_STRING (name
);
1338 if (!NILP (program
))
1339 CHECK_STRING (program
);
1341 proc
= make_process (name
);
1342 /* If an error occurs and we can't start the process, we want to
1343 remove it from the process list. This means that each error
1344 check in create_process doesn't need to call remove_process
1345 itself; it's all taken care of here. */
1346 record_unwind_protect (start_process_unwind
, proc
);
1348 XPROCESS (proc
)->childp
= Qt
;
1349 XPROCESS (proc
)->plist
= Qnil
;
1350 XPROCESS (proc
)->type
= Qreal
;
1351 XPROCESS (proc
)->buffer
= buffer
;
1352 XPROCESS (proc
)->sentinel
= Qnil
;
1353 XPROCESS (proc
)->filter
= Qnil
;
1354 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1357 /* AKA GNUTLS_INITSTAGE(proc). */
1358 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1359 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1362 #ifdef ADAPTIVE_READ_BUFFERING
1363 XPROCESS (proc
)->adaptive_read_buffering
1364 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1365 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1368 /* Make the process marker point into the process buffer (if any). */
1369 if (BUFFERP (buffer
))
1370 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1371 BUF_ZV (XBUFFER (buffer
)),
1372 BUF_ZV_BYTE (XBUFFER (buffer
)));
1375 /* Decide coding systems for communicating with the process. Here
1376 we don't setup the structure coding_system nor pay attention to
1377 unibyte mode. They are done in create_process. */
1379 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1380 Lisp_Object coding_systems
= Qt
;
1381 Lisp_Object val
, *args2
;
1382 struct gcpro gcpro1
, gcpro2
;
1384 val
= Vcoding_system_for_read
;
1387 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1388 args2
[0] = Qstart_process
;
1389 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1390 GCPRO2 (proc
, current_dir
);
1391 if (!NILP (program
))
1392 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1394 if (CONSP (coding_systems
))
1395 val
= XCAR (coding_systems
);
1396 else if (CONSP (Vdefault_process_coding_system
))
1397 val
= XCAR (Vdefault_process_coding_system
);
1399 XPROCESS (proc
)->decode_coding_system
= val
;
1401 val
= Vcoding_system_for_write
;
1404 if (EQ (coding_systems
, Qt
))
1406 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1407 args2
[0] = Qstart_process
;
1408 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1409 GCPRO2 (proc
, current_dir
);
1410 if (!NILP (program
))
1411 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1414 if (CONSP (coding_systems
))
1415 val
= XCDR (coding_systems
);
1416 else if (CONSP (Vdefault_process_coding_system
))
1417 val
= XCDR (Vdefault_process_coding_system
);
1419 XPROCESS (proc
)->encode_coding_system
= val
;
1420 /* Note: At this moment, the above coding system may leave
1421 text-conversion or eol-conversion unspecified. They will be
1422 decided after we read output from the process and decode it by
1423 some coding system, or just before we actually send a text to
1428 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1429 XPROCESS (proc
)->decoding_carryover
= 0;
1430 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1432 XPROCESS (proc
)->inherit_coding_system_flag
1433 = !(NILP (buffer
) || !inherit_process_coding_system
);
1435 if (!NILP (program
))
1437 /* If program file name is not absolute, search our path for it.
1438 Put the name we will really use in TEM. */
1439 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1440 && !(SCHARS (program
) > 1
1441 && IS_DEVICE_SEP (SREF (program
, 1))))
1443 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1446 GCPRO4 (name
, program
, buffer
, current_dir
);
1447 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1450 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1451 tem
= Fexpand_file_name (tem
, Qnil
);
1455 if (!NILP (Ffile_directory_p (program
)))
1456 error ("Specified program for new process is a directory");
1460 /* If program file name starts with /: for quoting a magic name,
1462 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1463 && SREF (tem
, 1) == ':')
1464 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1467 Lisp_Object arg_encoding
= Qnil
;
1468 struct gcpro gcpro1
;
1471 /* Encode the file name and put it in NEW_ARGV.
1472 That's where the child will use it to execute the program. */
1473 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1475 /* Here we encode arguments by the coding system used for sending
1476 data to the process. We don't support using different coding
1477 systems for encoding arguments and for encoding data sent to the
1480 for (i
= 3; i
< nargs
; i
++)
1482 tem
= Fcons (args
[i
], tem
);
1483 CHECK_STRING (XCAR (tem
));
1484 if (STRING_MULTIBYTE (XCAR (tem
)))
1486 if (NILP (arg_encoding
))
1487 arg_encoding
= (complement_process_encoding_system
1488 (XPROCESS (proc
)->encode_coding_system
));
1490 code_convert_string_norecord
1491 (XCAR (tem
), arg_encoding
, 1));
1498 /* Now that everything is encoded we can collect the strings into
1500 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1501 new_argv
[nargs
- 2] = 0;
1503 for (i
= nargs
- 2; i
-- != 0; )
1505 new_argv
[i
] = SDATA (XCAR (tem
));
1509 create_process (proc
, (char **) new_argv
, current_dir
);
1514 return unbind_to (count
, proc
);
1517 /* This function is the unwind_protect form for Fstart_process. If
1518 PROC doesn't have its pid set, then we know someone has signaled
1519 an error and the process wasn't started successfully, so we should
1520 remove it from the process list. */
1522 start_process_unwind (Lisp_Object proc
)
1524 if (!PROCESSP (proc
))
1527 /* Was PROC started successfully?
1528 -2 is used for a pty with no process, eg for gdb. */
1529 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1530 remove_process (proc
);
1536 create_process_1 (struct atimer
*timer
)
1538 /* Nothing to do. */
1543 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1545 int inchannel
, outchannel
;
1548 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1549 int wait_child_setup
[2];
1553 struct sigaction sigint_action
;
1554 struct sigaction sigquit_action
;
1555 struct sigaction sigpipe_action
;
1557 struct sigaction sighup_action
;
1559 /* Use volatile to protect variables from being clobbered by longjmp. */
1560 volatile int forkin
, forkout
;
1561 volatile int pty_flag
= 0;
1563 extern char **environ
;
1566 inchannel
= outchannel
= -1;
1569 if (!NILP (Vprocess_connection_type
))
1570 outchannel
= inchannel
= allocate_pty ();
1574 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1575 /* On most USG systems it does not work to open the pty's tty here,
1576 then close it and reopen it in the child. */
1578 /* Don't let this terminal become our controlling terminal
1579 (in case we don't have one). */
1580 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1582 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1585 report_file_error ("Opening pty", Qnil
);
1587 forkin
= forkout
= -1;
1588 #endif /* not USG, or USG_SUBTTY_WORKS */
1592 #endif /* HAVE_PTYS */
1597 report_file_error ("Creating pipe", Qnil
);
1603 emacs_close (inchannel
);
1604 emacs_close (forkout
);
1605 report_file_error ("Creating pipe", Qnil
);
1611 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1615 tem
= pipe (wait_child_setup
);
1617 report_file_error ("Creating pipe", Qnil
);
1618 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1620 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1623 emacs_close (wait_child_setup
[0]);
1624 emacs_close (wait_child_setup
[1]);
1625 report_file_error ("Setting file descriptor flags", Qnil
);
1631 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1632 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1635 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1636 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1640 /* Record this as an active process, with its channels.
1641 As a result, child_setup will close Emacs's side of the pipes. */
1642 chan_process
[inchannel
] = process
;
1643 XPROCESS (process
)->infd
= inchannel
;
1644 XPROCESS (process
)->outfd
= outchannel
;
1646 /* Previously we recorded the tty descriptor used in the subprocess.
1647 It was only used for getting the foreground tty process, so now
1648 we just reopen the device (see emacs_get_tty_pgrp) as this is
1649 more portable (see USG_SUBTTY_WORKS above). */
1651 XPROCESS (process
)->pty_flag
= pty_flag
;
1652 XPROCESS (process
)->status
= Qrun
;
1654 /* Delay interrupts until we have a chance to store
1655 the new fork's pid in its process structure */
1656 sigemptyset (&blocked
);
1658 sigaddset (&blocked
, SIGCHLD
);
1660 #ifdef HAVE_WORKING_VFORK
1661 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1662 this sets the parent's signal handlers as well as the child's.
1663 So delay all interrupts whose handlers the child might munge,
1664 and record the current handlers so they can be restored later. */
1665 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1666 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1667 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1669 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1671 #endif /* HAVE_WORKING_VFORK */
1672 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1674 FD_SET (inchannel
, &input_wait_mask
);
1675 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1676 if (inchannel
> max_process_desc
)
1677 max_process_desc
= inchannel
;
1679 /* Until we store the proper pid, enable sigchld_handler
1680 to recognize an unknown pid as standing for this process.
1681 It is very important not to let this `marker' value stay
1682 in the table after this function has returned; if it does
1683 it might cause call-process to hang and subsequent asynchronous
1684 processes to get their return values scrambled. */
1685 XPROCESS (process
)->pid
= -1;
1687 /* This must be called after the above line because it may signal an
1689 setup_process_coding_systems (process
);
1694 /* child_setup must clobber environ on systems with true vfork.
1695 Protect it from permanent change. */
1696 char **save_environ
= environ
;
1697 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1702 #endif /* not WINDOWSNT */
1704 int xforkin
= forkin
;
1705 int xforkout
= forkout
;
1707 #if 0 /* This was probably a mistake--it duplicates code later on,
1708 but fails to handle all the cases. */
1709 /* Make sure SIGCHLD is not blocked in the child. */
1710 sigsetmask (SIGEMPTYMASK
);
1713 /* Make the pty be the controlling terminal of the process. */
1715 /* First, disconnect its current controlling terminal. */
1717 /* We tried doing setsid only if pty_flag, but it caused
1718 process_set_signal to fail on SGI when using a pipe. */
1720 /* Make the pty's terminal the controlling terminal. */
1721 if (pty_flag
&& xforkin
>= 0)
1724 /* We ignore the return value
1725 because faith@cs.unc.edu says that is necessary on Linux. */
1726 ioctl (xforkin
, TIOCSCTTY
, 0);
1729 #else /* not HAVE_SETSID */
1731 /* It's very important to call setpgrp here and no time
1732 afterwards. Otherwise, we lose our controlling tty which
1733 is set when we open the pty. */
1736 #endif /* not HAVE_SETSID */
1737 #if defined (LDISC1)
1738 if (pty_flag
&& xforkin
>= 0)
1741 tcgetattr (xforkin
, &t
);
1743 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1744 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1747 #if defined (NTTYDISC) && defined (TIOCSETD)
1748 if (pty_flag
&& xforkin
>= 0)
1750 /* Use new line discipline. */
1751 int ldisc
= NTTYDISC
;
1752 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1757 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1758 can do TIOCSPGRP only to the process's controlling tty. */
1761 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1762 I can't test it since I don't have 4.3. */
1763 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1766 ioctl (j
, TIOCNOTTY
, 0);
1770 /* In order to get a controlling terminal on some versions
1771 of BSD, it is necessary to put the process in pgrp 0
1772 before it opens the terminal. */
1780 #endif /* TIOCNOTTY */
1782 #if !defined (DONT_REOPEN_PTY)
1783 /*** There is a suggestion that this ought to be a
1784 conditional on TIOCSPGRP,
1785 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1786 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1787 that system does seem to need this code, even though
1788 both HAVE_SETSID and TIOCSCTTY are defined. */
1789 /* Now close the pty (if we had it open) and reopen it.
1790 This makes the pty the controlling terminal of the subprocess. */
1794 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1797 emacs_close (xforkin
);
1798 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1802 emacs_write (1, "Couldn't open the pty terminal ", 31);
1803 emacs_write (1, pty_name
, strlen (pty_name
));
1804 emacs_write (1, "\n", 1);
1809 #endif /* not DONT_REOPEN_PTY */
1811 #ifdef SETUP_SLAVE_PTY
1816 #endif /* SETUP_SLAVE_PTY */
1818 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1819 Now reenable it in the child, so it will die when we want it to. */
1821 signal (SIGHUP
, SIG_DFL
);
1823 #endif /* HAVE_PTYS */
1825 signal (SIGINT
, SIG_DFL
);
1826 signal (SIGQUIT
, SIG_DFL
);
1827 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1829 signal (SIGPIPE
, SIG_DFL
);
1831 /* Stop blocking signals in the child. */
1832 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1835 child_setup_tty (xforkout
);
1837 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1838 new_argv
, 1, encoded_current_dir
);
1839 #else /* not WINDOWSNT */
1841 emacs_close (wait_child_setup
[0]);
1843 child_setup (xforkin
, xforkout
, xforkout
,
1844 new_argv
, 1, encoded_current_dir
);
1845 #endif /* not WINDOWSNT */
1847 environ
= save_environ
;
1852 /* This runs in the Emacs process. */
1856 emacs_close (forkin
);
1857 if (forkin
!= forkout
&& forkout
>= 0)
1858 emacs_close (forkout
);
1862 /* vfork succeeded. */
1863 XPROCESS (process
)->pid
= pid
;
1866 register_child (pid
, inchannel
);
1867 #endif /* WINDOWSNT */
1869 /* If the subfork execv fails, and it exits,
1870 this close hangs. I don't know why.
1871 So have an interrupt jar it loose. */
1873 struct atimer
*timer
;
1877 EMACS_SET_SECS_USECS (offset
, 1, 0);
1878 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1881 emacs_close (forkin
);
1883 cancel_atimer (timer
);
1887 if (forkin
!= forkout
&& forkout
>= 0)
1888 emacs_close (forkout
);
1892 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1895 XPROCESS (process
)->tty_name
= Qnil
;
1897 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1898 /* Wait for child_setup to complete in case that vfork is
1899 actually defined as fork. The descriptor wait_child_setup[1]
1900 of a pipe is closed at the child side either by close-on-exec
1901 on successful execvp or the _exit call in child_setup. */
1905 emacs_close (wait_child_setup
[1]);
1906 emacs_read (wait_child_setup
[0], &dummy
, 1);
1907 emacs_close (wait_child_setup
[0]);
1912 /* Restore the signal state whether vfork succeeded or not.
1913 (We will signal an error, below, if it failed.) */
1914 #ifdef HAVE_WORKING_VFORK
1915 /* Restore the parent's signal handlers. */
1916 sigaction (SIGINT
, &sigint_action
, 0);
1917 sigaction (SIGQUIT
, &sigquit_action
, 0);
1918 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1920 sigaction (SIGHUP
, &sighup_action
, 0);
1922 #endif /* HAVE_WORKING_VFORK */
1923 /* Stop blocking signals in the parent. */
1924 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1926 /* Now generate the error if vfork failed. */
1928 report_file_error ("Doing vfork", Qnil
);
1932 create_pty (Lisp_Object process
)
1934 int inchannel
, outchannel
;
1937 inchannel
= outchannel
= -1;
1940 if (!NILP (Vprocess_connection_type
))
1941 outchannel
= inchannel
= allocate_pty ();
1945 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1946 /* On most USG systems it does not work to open the pty's tty here,
1947 then close it and reopen it in the child. */
1949 /* Don't let this terminal become our controlling terminal
1950 (in case we don't have one). */
1951 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1953 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1956 report_file_error ("Opening pty", Qnil
);
1957 #if defined (DONT_REOPEN_PTY)
1958 /* In the case that vfork is defined as fork, the parent process
1959 (Emacs) may send some data before the child process completes
1960 tty options setup. So we setup tty before forking. */
1961 child_setup_tty (forkout
);
1962 #endif /* DONT_REOPEN_PTY */
1963 #endif /* not USG, or USG_SUBTTY_WORKS */
1966 #endif /* HAVE_PTYS */
1969 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1970 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1973 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1974 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1978 /* Record this as an active process, with its channels.
1979 As a result, child_setup will close Emacs's side of the pipes. */
1980 chan_process
[inchannel
] = process
;
1981 XPROCESS (process
)->infd
= inchannel
;
1982 XPROCESS (process
)->outfd
= outchannel
;
1984 /* Previously we recorded the tty descriptor used in the subprocess.
1985 It was only used for getting the foreground tty process, so now
1986 we just reopen the device (see emacs_get_tty_pgrp) as this is
1987 more portable (see USG_SUBTTY_WORKS above). */
1989 XPROCESS (process
)->pty_flag
= pty_flag
;
1990 XPROCESS (process
)->status
= Qrun
;
1991 setup_process_coding_systems (process
);
1993 FD_SET (inchannel
, &input_wait_mask
);
1994 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1995 if (inchannel
> max_process_desc
)
1996 max_process_desc
= inchannel
;
1998 XPROCESS (process
)->pid
= -2;
2001 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2004 XPROCESS (process
)->tty_name
= Qnil
;
2008 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2009 The address family of sa is not included in the result. */
2012 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2014 Lisp_Object address
;
2017 register struct Lisp_Vector
*p
;
2019 /* Workaround for a bug in getsockname on BSD: Names bound to
2020 sockets in the UNIX domain are inaccessible; getsockname returns
2021 a zero length name. */
2022 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2023 return empty_unibyte_string
;
2025 switch (sa
->sa_family
)
2029 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2030 len
= sizeof (sin
->sin_addr
) + 1;
2031 address
= Fmake_vector (make_number (len
), Qnil
);
2032 p
= XVECTOR (address
);
2033 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2034 cp
= (unsigned char *) &sin
->sin_addr
;
2040 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2041 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2042 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2043 address
= Fmake_vector (make_number (len
), Qnil
);
2044 p
= XVECTOR (address
);
2045 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2046 for (i
= 0; i
< len
; i
++)
2047 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2051 #ifdef HAVE_LOCAL_SOCKETS
2054 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2055 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2056 if (sockun
->sun_path
[i
] == 0)
2058 return make_unibyte_string (sockun
->sun_path
, i
);
2062 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2063 address
= Fcons (make_number (sa
->sa_family
),
2064 Fmake_vector (make_number (len
), Qnil
));
2065 p
= XVECTOR (XCDR (address
));
2066 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2072 p
->contents
[i
++] = make_number (*cp
++);
2078 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2081 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2083 register struct Lisp_Vector
*p
;
2085 if (VECTORP (address
))
2087 p
= XVECTOR (address
);
2088 if (p
->header
.size
== 5)
2091 return sizeof (struct sockaddr_in
);
2094 else if (p
->header
.size
== 9)
2096 *familyp
= AF_INET6
;
2097 return sizeof (struct sockaddr_in6
);
2101 #ifdef HAVE_LOCAL_SOCKETS
2102 else if (STRINGP (address
))
2104 *familyp
= AF_LOCAL
;
2105 return sizeof (struct sockaddr_un
);
2108 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2110 struct sockaddr
*sa
;
2111 *familyp
= XINT (XCAR (address
));
2112 p
= XVECTOR (XCDR (address
));
2113 return p
->header
.size
+ sizeof (sa
->sa_family
);
2118 /* Convert an address object (vector or string) to an internal sockaddr.
2120 The address format has been basically validated by
2121 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2122 it could have come from user data. So if FAMILY is not valid,
2123 we return after zeroing *SA. */
2126 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2128 register struct Lisp_Vector
*p
;
2129 register unsigned char *cp
= NULL
;
2132 memset (sa
, 0, len
);
2134 if (VECTORP (address
))
2136 p
= XVECTOR (address
);
2137 if (family
== AF_INET
)
2139 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2140 len
= sizeof (sin
->sin_addr
) + 1;
2141 i
= XINT (p
->contents
[--len
]);
2142 sin
->sin_port
= htons (i
);
2143 cp
= (unsigned char *)&sin
->sin_addr
;
2144 sa
->sa_family
= family
;
2147 else if (family
== AF_INET6
)
2149 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2150 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2151 len
= sizeof (sin6
->sin6_addr
) + 1;
2152 i
= XINT (p
->contents
[--len
]);
2153 sin6
->sin6_port
= htons (i
);
2154 for (i
= 0; i
< len
; i
++)
2155 if (INTEGERP (p
->contents
[i
]))
2157 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2160 sa
->sa_family
= family
;
2167 else if (STRINGP (address
))
2169 #ifdef HAVE_LOCAL_SOCKETS
2170 if (family
== AF_LOCAL
)
2172 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2173 cp
= SDATA (address
);
2174 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2175 sockun
->sun_path
[i
] = *cp
++;
2176 sa
->sa_family
= family
;
2183 p
= XVECTOR (XCDR (address
));
2184 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2187 for (i
= 0; i
< len
; i
++)
2188 if (INTEGERP (p
->contents
[i
]))
2189 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2192 #ifdef DATAGRAM_SOCKETS
2193 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2195 doc
: /* Get the current datagram address associated with PROCESS. */)
2196 (Lisp_Object process
)
2200 CHECK_PROCESS (process
);
2202 if (!DATAGRAM_CONN_P (process
))
2205 channel
= XPROCESS (process
)->infd
;
2206 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2207 datagram_address
[channel
].len
);
2210 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2212 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2213 Returns nil upon error setting address, ADDRESS otherwise. */)
2214 (Lisp_Object process
, Lisp_Object address
)
2219 CHECK_PROCESS (process
);
2221 if (!DATAGRAM_CONN_P (process
))
2224 channel
= XPROCESS (process
)->infd
;
2226 len
= get_lisp_to_sockaddr_size (address
, &family
);
2227 if (datagram_address
[channel
].len
!= len
)
2229 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2235 static const struct socket_options
{
2236 /* The name of this option. Should be lowercase version of option
2237 name without SO_ prefix. */
2239 /* Option level SOL_... */
2241 /* Option number SO_... */
2243 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2244 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2245 } socket_options
[] =
2247 #ifdef SO_BINDTODEVICE
2248 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2251 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2254 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2257 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2260 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2263 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2266 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2269 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2271 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2274 /* Set option OPT to value VAL on socket S.
2276 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2277 Signals an error if setting a known option fails.
2281 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2284 const struct socket_options
*sopt
;
2289 name
= SSDATA (SYMBOL_NAME (opt
));
2290 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2291 if (strcmp (name
, sopt
->name
) == 0)
2294 switch (sopt
->opttype
)
2299 optval
= NILP (val
) ? 0 : 1;
2300 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2301 &optval
, sizeof (optval
));
2309 optval
= XINT (val
);
2311 error ("Bad option value for %s", name
);
2312 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2313 &optval
, sizeof (optval
));
2317 #ifdef SO_BINDTODEVICE
2320 char devname
[IFNAMSIZ
+1];
2322 /* This is broken, at least in the Linux 2.4 kernel.
2323 To unbind, the arg must be a zero integer, not the empty string.
2324 This should work on all systems. KFS. 2003-09-23. */
2325 memset (devname
, 0, sizeof devname
);
2328 char *arg
= SSDATA (val
);
2329 int len
= min (strlen (arg
), IFNAMSIZ
);
2330 memcpy (devname
, arg
, len
);
2332 else if (!NILP (val
))
2333 error ("Bad option value for %s", name
);
2334 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2343 struct linger linger
;
2346 linger
.l_linger
= 0;
2348 linger
.l_linger
= XINT (val
);
2350 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2351 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2352 &linger
, sizeof (linger
));
2362 report_file_error ("Cannot set network option",
2363 Fcons (opt
, Fcons (val
, Qnil
)));
2364 return (1 << sopt
->optbit
);
2368 DEFUN ("set-network-process-option",
2369 Fset_network_process_option
, Sset_network_process_option
,
2371 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2372 See `make-network-process' for a list of options and values.
2373 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2374 OPTION is not a supported option, return nil instead; otherwise return t. */)
2375 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2378 struct Lisp_Process
*p
;
2380 CHECK_PROCESS (process
);
2381 p
= XPROCESS (process
);
2382 if (!NETCONN1_P (p
))
2383 error ("Process is not a network process");
2387 error ("Process is not running");
2389 if (set_socket_option (s
, option
, value
))
2391 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2395 if (NILP (no_error
))
2396 error ("Unknown or unsupported option");
2402 DEFUN ("serial-process-configure",
2403 Fserial_process_configure
,
2404 Sserial_process_configure
,
2406 doc
: /* Configure speed, bytesize, etc. of a serial process.
2408 Arguments are specified as keyword/argument pairs. Attributes that
2409 are not given are re-initialized from the process's current
2410 configuration (available via the function `process-contact') or set to
2411 reasonable default values. The following arguments are defined:
2417 -- Any of these arguments can be given to identify the process that is
2418 to be configured. If none of these arguments is given, the current
2419 buffer's process is used.
2421 :speed SPEED -- SPEED is the speed of the serial port in bits per
2422 second, also called baud rate. Any value can be given for SPEED, but
2423 most serial ports work only at a few defined values between 1200 and
2424 115200, with 9600 being the most common value. If SPEED is nil, the
2425 serial port is not configured any further, i.e., all other arguments
2426 are ignored. This may be useful for special serial ports such as
2427 Bluetooth-to-serial converters which can only be configured through AT
2428 commands. A value of nil for SPEED can be used only when passed
2429 through `make-serial-process' or `serial-term'.
2431 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2432 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2434 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2435 `odd' (use odd parity), or the symbol `even' (use even parity). If
2436 PARITY is not given, no parity is used.
2438 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2439 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2440 is not given or nil, 1 stopbit is used.
2442 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2443 flowcontrol to be used, which is either nil (don't use flowcontrol),
2444 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2445 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2446 flowcontrol is used.
2448 `serial-process-configure' is called by `make-serial-process' for the
2449 initial configuration of the serial port.
2453 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2455 \(serial-process-configure
2456 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2458 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2460 usage: (serial-process-configure &rest ARGS) */)
2461 (ptrdiff_t nargs
, Lisp_Object
*args
)
2463 struct Lisp_Process
*p
;
2464 Lisp_Object contact
= Qnil
;
2465 Lisp_Object proc
= Qnil
;
2466 struct gcpro gcpro1
;
2468 contact
= Flist (nargs
, args
);
2471 proc
= Fplist_get (contact
, QCprocess
);
2473 proc
= Fplist_get (contact
, QCname
);
2475 proc
= Fplist_get (contact
, QCbuffer
);
2477 proc
= Fplist_get (contact
, QCport
);
2478 proc
= get_process (proc
);
2479 p
= XPROCESS (proc
);
2480 if (!EQ (p
->type
, Qserial
))
2481 error ("Not a serial process");
2483 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2489 serial_configure (p
, contact
);
2495 /* Used by make-serial-process to recover from errors. */
2497 make_serial_process_unwind (Lisp_Object proc
)
2499 if (!PROCESSP (proc
))
2501 remove_process (proc
);
2505 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2507 doc
: /* Create and return a serial port process.
2509 In Emacs, serial port connections are represented by process objects,
2510 so input and output work as for subprocesses, and `delete-process'
2511 closes a serial port connection. However, a serial process has no
2512 process id, it cannot be signaled, and the status codes are different
2513 from normal processes.
2515 `make-serial-process' creates a process and a buffer, on which you
2516 probably want to use `process-send-string'. Try \\[serial-term] for
2517 an interactive terminal. See below for examples.
2519 Arguments are specified as keyword/argument pairs. The following
2520 arguments are defined:
2522 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2523 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2524 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2525 the backslashes in strings).
2527 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2528 which is called by `make-serial-process'.
2530 :name NAME -- NAME is the name of the process. If NAME is not given,
2531 the value of PORT is used.
2533 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2534 with the process. Process output goes at the end of that buffer,
2535 unless you specify an output stream or filter function to handle the
2536 output. If BUFFER is not given, the value of NAME is used.
2538 :coding CODING -- If CODING is a symbol, it specifies the coding
2539 system used for both reading and writing for this process. If CODING
2540 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2541 ENCODING is used for writing.
2543 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2544 the process is running. If BOOL is not given, query before exiting.
2546 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2547 In the stopped state, a serial process does not accept incoming data,
2548 but you can send outgoing data. The stopped state is cleared by
2549 `continue-process' and set by `stop-process'.
2551 :filter FILTER -- Install FILTER as the process filter.
2553 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2555 :plist PLIST -- Install PLIST as the initial plist of the process.
2562 -- These arguments are handled by `serial-process-configure', which is
2563 called by `make-serial-process'.
2565 The original argument list, possibly modified by later configuration,
2566 is available via the function `process-contact'.
2570 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2572 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2574 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2576 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2578 usage: (make-serial-process &rest ARGS) */)
2579 (ptrdiff_t nargs
, Lisp_Object
*args
)
2582 Lisp_Object proc
, contact
, port
;
2583 struct Lisp_Process
*p
;
2584 struct gcpro gcpro1
;
2585 Lisp_Object name
, buffer
;
2586 Lisp_Object tem
, val
;
2587 int specpdl_count
= -1;
2592 contact
= Flist (nargs
, args
);
2595 port
= Fplist_get (contact
, QCport
);
2597 error ("No port specified");
2598 CHECK_STRING (port
);
2600 if (NILP (Fplist_member (contact
, QCspeed
)))
2601 error (":speed not specified");
2602 if (!NILP (Fplist_get (contact
, QCspeed
)))
2603 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2605 name
= Fplist_get (contact
, QCname
);
2608 CHECK_STRING (name
);
2609 proc
= make_process (name
);
2610 specpdl_count
= SPECPDL_INDEX ();
2611 record_unwind_protect (make_serial_process_unwind
, proc
);
2612 p
= XPROCESS (proc
);
2614 fd
= serial_open (SSDATA (port
));
2617 if (fd
> max_process_desc
)
2618 max_process_desc
= fd
;
2619 chan_process
[fd
] = proc
;
2621 buffer
= Fplist_get (contact
, QCbuffer
);
2624 buffer
= Fget_buffer_create (buffer
);
2627 p
->childp
= contact
;
2628 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2630 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2631 p
->filter
= Fplist_get (contact
, QCfilter
);
2633 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2634 p
->kill_without_query
= 1;
2635 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2639 if (!EQ (p
->command
, Qt
))
2641 FD_SET (fd
, &input_wait_mask
);
2642 FD_SET (fd
, &non_keyboard_wait_mask
);
2645 if (BUFFERP (buffer
))
2647 set_marker_both (p
->mark
, buffer
,
2648 BUF_ZV (XBUFFER (buffer
)),
2649 BUF_ZV_BYTE (XBUFFER (buffer
)));
2652 tem
= Fplist_member (contact
, QCcoding
);
2653 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2659 val
= XCAR (XCDR (tem
));
2663 else if (!NILP (Vcoding_system_for_read
))
2664 val
= Vcoding_system_for_read
;
2665 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2666 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2668 p
->decode_coding_system
= val
;
2673 val
= XCAR (XCDR (tem
));
2677 else if (!NILP (Vcoding_system_for_write
))
2678 val
= Vcoding_system_for_write
;
2679 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2680 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2682 p
->encode_coding_system
= val
;
2684 setup_process_coding_systems (proc
);
2685 p
->decoding_buf
= empty_unibyte_string
;
2686 p
->decoding_carryover
= 0;
2687 p
->encoding_buf
= empty_unibyte_string
;
2688 p
->inherit_coding_system_flag
2689 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2691 Fserial_process_configure (nargs
, args
);
2693 specpdl_ptr
= specpdl
+ specpdl_count
;
2699 /* Create a network stream/datagram client/server process. Treated
2700 exactly like a normal process when reading and writing. Primary
2701 differences are in status display and process deletion. A network
2702 connection has no PID; you cannot signal it. All you can do is
2703 stop/continue it and deactivate/close it via delete-process */
2705 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2707 doc
: /* Create and return a network server or client process.
2709 In Emacs, network connections are represented by process objects, so
2710 input and output work as for subprocesses and `delete-process' closes
2711 a network connection. However, a network process has no process id,
2712 it cannot be signaled, and the status codes are different from normal
2715 Arguments are specified as keyword/argument pairs. The following
2716 arguments are defined:
2718 :name NAME -- NAME is name for process. It is modified if necessary
2721 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2722 with the process. Process output goes at end of that buffer, unless
2723 you specify an output stream or filter function to handle the output.
2724 BUFFER may be also nil, meaning that this process is not associated
2727 :host HOST -- HOST is name of the host to connect to, or its IP
2728 address. The symbol `local' specifies the local host. If specified
2729 for a server process, it must be a valid name or address for the local
2730 host, and only clients connecting to that address will be accepted.
2732 :service SERVICE -- SERVICE is name of the service desired, or an
2733 integer specifying a port number to connect to. If SERVICE is t,
2734 a random port number is selected for the server. (If Emacs was
2735 compiled with getaddrinfo, a port number can also be specified as a
2736 string, e.g. "80", as well as an integer. This is not portable.)
2738 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2739 stream type connection, `datagram' creates a datagram type connection,
2740 `seqpacket' creates a reliable datagram connection.
2742 :family FAMILY -- FAMILY is the address (and protocol) family for the
2743 service specified by HOST and SERVICE. The default (nil) is to use
2744 whatever address family (IPv4 or IPv6) that is defined for the host
2745 and port number specified by HOST and SERVICE. Other address families
2747 local -- for a local (i.e. UNIX) address specified by SERVICE.
2748 ipv4 -- use IPv4 address family only.
2749 ipv6 -- use IPv6 address family only.
2751 :local ADDRESS -- ADDRESS is the local address used for the connection.
2752 This parameter is ignored when opening a client process. When specified
2753 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2755 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2756 connection. This parameter is ignored when opening a stream server
2757 process. For a datagram server process, it specifies the initial
2758 setting of the remote datagram address. When specified for a client
2759 process, the FAMILY, HOST, and SERVICE args are ignored.
2761 The format of ADDRESS depends on the address family:
2762 - An IPv4 address is represented as an vector of integers [A B C D P]
2763 corresponding to numeric IP address A.B.C.D and port number P.
2764 - A local address is represented as a string with the address in the
2765 local address space.
2766 - An "unsupported family" address is represented by a cons (F . AV)
2767 where F is the family number and AV is a vector containing the socket
2768 address data with one element per address data byte. Do not rely on
2769 this format in portable code, as it may depend on implementation
2770 defined constants, data sizes, and data structure alignment.
2772 :coding CODING -- If CODING is a symbol, it specifies the coding
2773 system used for both reading and writing for this process. If CODING
2774 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2775 ENCODING is used for writing.
2777 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2778 return without waiting for the connection to complete; instead, the
2779 sentinel function will be called with second arg matching "open" (if
2780 successful) or "failed" when the connect completes. Default is to use
2781 a blocking connect (i.e. wait) for stream type connections.
2783 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2784 running when Emacs is exited.
2786 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2787 In the stopped state, a server process does not accept new
2788 connections, and a client process does not handle incoming traffic.
2789 The stopped state is cleared by `continue-process' and set by
2792 :filter FILTER -- Install FILTER as the process filter.
2794 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2795 process filter are multibyte, otherwise they are unibyte.
2796 If this keyword is not specified, the strings are multibyte if
2797 `default-enable-multibyte-characters' is non-nil.
2799 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2801 :log LOG -- Install LOG as the server process log function. This
2802 function is called when the server accepts a network connection from a
2803 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2804 is the server process, CLIENT is the new process for the connection,
2805 and MESSAGE is a string.
2807 :plist PLIST -- Install PLIST as the new process' initial plist.
2809 :server QLEN -- if QLEN is non-nil, create a server process for the
2810 specified FAMILY, SERVICE, and connection type (stream or datagram).
2811 If QLEN is an integer, it is used as the max. length of the server's
2812 pending connection queue (also known as the backlog); the default
2813 queue length is 5. Default is to create a client process.
2815 The following network options can be specified for this connection:
2817 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2818 :dontroute BOOL -- Only send to directly connected hosts.
2819 :keepalive BOOL -- Send keep-alive messages on network stream.
2820 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2821 :oobinline BOOL -- Place out-of-band data in receive data stream.
2822 :priority INT -- Set protocol defined priority for sent packets.
2823 :reuseaddr BOOL -- Allow reusing a recently used local address
2824 (this is allowed by default for a server process).
2825 :bindtodevice NAME -- bind to interface NAME. Using this may require
2826 special privileges on some systems.
2828 Consult the relevant system programmer's manual pages for more
2829 information on using these options.
2832 A server process will listen for and accept connections from clients.
2833 When a client connection is accepted, a new network process is created
2834 for the connection with the following parameters:
2836 - The client's process name is constructed by concatenating the server
2837 process' NAME and a client identification string.
2838 - If the FILTER argument is non-nil, the client process will not get a
2839 separate process buffer; otherwise, the client's process buffer is a newly
2840 created buffer named after the server process' BUFFER name or process
2841 NAME concatenated with the client identification string.
2842 - The connection type and the process filter and sentinel parameters are
2843 inherited from the server process' TYPE, FILTER and SENTINEL.
2844 - The client process' contact info is set according to the client's
2845 addressing information (typically an IP address and a port number).
2846 - The client process' plist is initialized from the server's plist.
2848 Notice that the FILTER and SENTINEL args are never used directly by
2849 the server process. Also, the BUFFER argument is not used directly by
2850 the server process, but via the optional :log function, accepted (and
2851 failed) connections may be logged in the server process' buffer.
2853 The original argument list, modified with the actual connection
2854 information, is available via the `process-contact' function.
2856 usage: (make-network-process &rest ARGS) */)
2857 (ptrdiff_t nargs
, Lisp_Object
*args
)
2860 Lisp_Object contact
;
2861 struct Lisp_Process
*p
;
2862 #ifdef HAVE_GETADDRINFO
2863 struct addrinfo ai
, *res
, *lres
;
2864 struct addrinfo hints
;
2865 const char *portstring
;
2867 #else /* HAVE_GETADDRINFO */
2868 struct _emacs_addrinfo
2874 struct sockaddr
*ai_addr
;
2875 struct _emacs_addrinfo
*ai_next
;
2877 #endif /* HAVE_GETADDRINFO */
2878 struct sockaddr_in address_in
;
2879 #ifdef HAVE_LOCAL_SOCKETS
2880 struct sockaddr_un address_un
;
2885 int s
= -1, outch
, inch
;
2886 struct gcpro gcpro1
;
2887 int count
= SPECPDL_INDEX ();
2889 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2891 Lisp_Object name
, buffer
, host
, service
, address
;
2892 Lisp_Object filter
, sentinel
;
2893 int is_non_blocking_client
= 0;
2894 int is_server
= 0, backlog
= 5;
2901 /* Save arguments for process-contact and clone-process. */
2902 contact
= Flist (nargs
, args
);
2906 /* Ensure socket support is loaded if available. */
2907 init_winsock (TRUE
);
2910 /* :type TYPE (nil: stream, datagram */
2911 tem
= Fplist_get (contact
, QCtype
);
2913 socktype
= SOCK_STREAM
;
2914 #ifdef DATAGRAM_SOCKETS
2915 else if (EQ (tem
, Qdatagram
))
2916 socktype
= SOCK_DGRAM
;
2918 #ifdef HAVE_SEQPACKET
2919 else if (EQ (tem
, Qseqpacket
))
2920 socktype
= SOCK_SEQPACKET
;
2923 error ("Unsupported connection type");
2926 tem
= Fplist_get (contact
, QCserver
);
2929 /* Don't support network sockets when non-blocking mode is
2930 not available, since a blocked Emacs is not useful. */
2931 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2932 error ("Network servers not supported");
2936 backlog
= XINT (tem
);
2940 /* Make QCaddress an alias for :local (server) or :remote (client). */
2941 QCaddress
= is_server
? QClocal
: QCremote
;
2944 if (!is_server
&& socktype
!= SOCK_DGRAM
2945 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2947 #ifndef NON_BLOCKING_CONNECT
2948 error ("Non-blocking connect not supported");
2950 is_non_blocking_client
= 1;
2954 name
= Fplist_get (contact
, QCname
);
2955 buffer
= Fplist_get (contact
, QCbuffer
);
2956 filter
= Fplist_get (contact
, QCfilter
);
2957 sentinel
= Fplist_get (contact
, QCsentinel
);
2959 CHECK_STRING (name
);
2961 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2962 ai
.ai_socktype
= socktype
;
2967 /* :local ADDRESS or :remote ADDRESS */
2968 address
= Fplist_get (contact
, QCaddress
);
2969 if (!NILP (address
))
2971 host
= service
= Qnil
;
2973 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2974 error ("Malformed :address");
2975 ai
.ai_family
= family
;
2976 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2977 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2981 /* :family FAMILY -- nil (for Inet), local, or integer. */
2982 tem
= Fplist_get (contact
, QCfamily
);
2985 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2991 #ifdef HAVE_LOCAL_SOCKETS
2992 else if (EQ (tem
, Qlocal
))
2996 else if (EQ (tem
, Qipv6
))
2999 else if (EQ (tem
, Qipv4
))
3001 else if (INTEGERP (tem
))
3002 family
= XINT (tem
);
3004 error ("Unknown address family");
3006 ai
.ai_family
= family
;
3008 /* :service SERVICE -- string, integer (port number), or t (random port). */
3009 service
= Fplist_get (contact
, QCservice
);
3011 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3012 host
= Fplist_get (contact
, QChost
);
3015 if (EQ (host
, Qlocal
))
3016 /* Depending on setup, "localhost" may map to different IPv4 and/or
3017 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3018 host
= build_string ("127.0.0.1");
3019 CHECK_STRING (host
);
3022 #ifdef HAVE_LOCAL_SOCKETS
3023 if (family
== AF_LOCAL
)
3027 message (":family local ignores the :host \"%s\" property",
3029 contact
= Fplist_put (contact
, QChost
, Qnil
);
3032 CHECK_STRING (service
);
3033 memset (&address_un
, 0, sizeof address_un
);
3034 address_un
.sun_family
= AF_LOCAL
;
3035 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3036 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3037 ai
.ai_addrlen
= sizeof address_un
;
3042 /* Slow down polling to every ten seconds.
3043 Some kernels have a bug which causes retrying connect to fail
3044 after a connect. Polling can interfere with gethostbyname too. */
3045 #ifdef POLL_FOR_INPUT
3046 if (socktype
!= SOCK_DGRAM
)
3048 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3049 bind_polling_period (10);
3053 #ifdef HAVE_GETADDRINFO
3054 /* If we have a host, use getaddrinfo to resolve both host and service.
3055 Otherwise, use getservbyname to lookup the service. */
3059 /* SERVICE can either be a string or int.
3060 Convert to a C string for later use by getaddrinfo. */
3061 if (EQ (service
, Qt
))
3063 else if (INTEGERP (service
))
3065 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3066 portstring
= portbuf
;
3070 CHECK_STRING (service
);
3071 portstring
= SSDATA (service
);
3076 memset (&hints
, 0, sizeof (hints
));
3078 hints
.ai_family
= family
;
3079 hints
.ai_socktype
= socktype
;
3080 hints
.ai_protocol
= 0;
3082 #ifdef HAVE_RES_INIT
3086 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3088 #ifdef HAVE_GAI_STRERROR
3089 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3091 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3097 #endif /* HAVE_GETADDRINFO */
3099 /* We end up here if getaddrinfo is not defined, or in case no hostname
3100 has been specified (e.g. for a local server process). */
3102 if (EQ (service
, Qt
))
3104 else if (INTEGERP (service
))
3105 port
= htons ((unsigned short) XINT (service
));
3108 struct servent
*svc_info
;
3109 CHECK_STRING (service
);
3110 svc_info
= getservbyname (SSDATA (service
),
3111 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3113 error ("Unknown service: %s", SDATA (service
));
3114 port
= svc_info
->s_port
;
3117 memset (&address_in
, 0, sizeof address_in
);
3118 address_in
.sin_family
= family
;
3119 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3120 address_in
.sin_port
= port
;
3122 #ifndef HAVE_GETADDRINFO
3125 struct hostent
*host_info_ptr
;
3127 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3128 as it may `hang' Emacs for a very long time. */
3132 #ifdef HAVE_RES_INIT
3136 host_info_ptr
= gethostbyname (SDATA (host
));
3141 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3142 host_info_ptr
->h_length
);
3143 family
= host_info_ptr
->h_addrtype
;
3144 address_in
.sin_family
= family
;
3147 /* Attempt to interpret host as numeric inet address */
3149 unsigned long numeric_addr
;
3150 numeric_addr
= inet_addr (SSDATA (host
));
3151 if (numeric_addr
== -1)
3152 error ("Unknown host \"%s\"", SDATA (host
));
3154 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3155 sizeof (address_in
.sin_addr
));
3159 #endif /* not HAVE_GETADDRINFO */
3161 ai
.ai_family
= family
;
3162 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3163 ai
.ai_addrlen
= sizeof address_in
;
3167 /* Do this in case we never enter the for-loop below. */
3168 count1
= SPECPDL_INDEX ();
3171 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3180 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3187 #ifdef DATAGRAM_SOCKETS
3188 if (!is_server
&& socktype
== SOCK_DGRAM
)
3190 #endif /* DATAGRAM_SOCKETS */
3192 #ifdef NON_BLOCKING_CONNECT
3193 if (is_non_blocking_client
)
3196 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3198 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3210 /* Make us close S if quit. */
3211 record_unwind_protect (close_file_unwind
, make_number (s
));
3213 /* Parse network options in the arg list.
3214 We simply ignore anything which isn't a known option (including other keywords).
3215 An error is signaled if setting a known option fails. */
3216 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3217 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3221 /* Configure as a server socket. */
3223 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3224 explicit :reuseaddr key to override this. */
3225 #ifdef HAVE_LOCAL_SOCKETS
3226 if (family
!= AF_LOCAL
)
3228 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3231 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3232 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3235 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3236 report_file_error ("Cannot bind server socket", Qnil
);
3238 #ifdef HAVE_GETSOCKNAME
3239 if (EQ (service
, Qt
))
3241 struct sockaddr_in sa1
;
3242 socklen_t len1
= sizeof (sa1
);
3243 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3245 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3246 service
= make_number (ntohs (sa1
.sin_port
));
3247 contact
= Fplist_put (contact
, QCservice
, service
);
3252 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3253 report_file_error ("Cannot listen on server socket", Qnil
);
3261 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3264 if (ret
== 0 || xerrno
== EISCONN
)
3266 /* The unwind-protect will be discarded afterwards.
3267 Likewise for immediate_quit. */
3271 #ifdef NON_BLOCKING_CONNECT
3273 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3277 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3284 if (xerrno
== EINTR
)
3286 /* Unlike most other syscalls connect() cannot be called
3287 again. (That would return EALREADY.) The proper way to
3288 wait for completion is select(). */
3296 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3303 report_file_error ("select failed", Qnil
);
3307 len
= sizeof xerrno
;
3308 eassert (FD_ISSET (s
, &fdset
));
3309 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3310 report_file_error ("getsockopt failed", Qnil
);
3312 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3316 #endif /* !WINDOWSNT */
3320 /* Discard the unwind protect closing S. */
3321 specpdl_ptr
= specpdl
+ count1
;
3326 if (xerrno
== EINTR
)
3333 #ifdef DATAGRAM_SOCKETS
3334 if (socktype
== SOCK_DGRAM
)
3336 if (datagram_address
[s
].sa
)
3338 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3339 datagram_address
[s
].len
= lres
->ai_addrlen
;
3343 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3344 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3347 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3348 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3349 conv_lisp_to_sockaddr (rfamily
, remote
,
3350 datagram_address
[s
].sa
, rlen
);
3354 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3357 contact
= Fplist_put (contact
, QCaddress
,
3358 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3359 #ifdef HAVE_GETSOCKNAME
3362 struct sockaddr_in sa1
;
3363 socklen_t len1
= sizeof (sa1
);
3364 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3365 contact
= Fplist_put (contact
, QClocal
,
3366 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3373 #ifdef HAVE_GETADDRINFO
3382 /* Discard the unwind protect for closing S, if any. */
3383 specpdl_ptr
= specpdl
+ count1
;
3385 /* Unwind bind_polling_period and request_sigio. */
3386 unbind_to (count
, Qnil
);
3390 /* If non-blocking got this far - and failed - assume non-blocking is
3391 not supported after all. This is probably a wrong assumption, but
3392 the normal blocking calls to open-network-stream handles this error
3394 if (is_non_blocking_client
)
3399 report_file_error ("make server process failed", contact
);
3401 report_file_error ("make client process failed", contact
);
3408 buffer
= Fget_buffer_create (buffer
);
3409 proc
= make_process (name
);
3411 chan_process
[inch
] = proc
;
3414 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3417 fcntl (inch
, F_SETFL
, O_NDELAY
);
3421 p
= XPROCESS (proc
);
3423 p
->childp
= contact
;
3424 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3428 p
->sentinel
= sentinel
;
3430 p
->log
= Fplist_get (contact
, QClog
);
3431 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3432 p
->kill_without_query
= 1;
3433 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3438 if (is_server
&& socktype
!= SOCK_DGRAM
)
3439 p
->status
= Qlisten
;
3441 /* Make the process marker point into the process buffer (if any). */
3442 if (BUFFERP (buffer
))
3443 set_marker_both (p
->mark
, buffer
,
3444 BUF_ZV (XBUFFER (buffer
)),
3445 BUF_ZV_BYTE (XBUFFER (buffer
)));
3447 #ifdef NON_BLOCKING_CONNECT
3448 if (is_non_blocking_client
)
3450 /* We may get here if connect did succeed immediately. However,
3451 in that case, we still need to signal this like a non-blocking
3453 p
->status
= Qconnect
;
3454 if (!FD_ISSET (inch
, &connect_wait_mask
))
3456 FD_SET (inch
, &connect_wait_mask
);
3457 FD_SET (inch
, &write_mask
);
3458 num_pending_connects
++;
3463 /* A server may have a client filter setting of Qt, but it must
3464 still listen for incoming connects unless it is stopped. */
3465 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3466 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3468 FD_SET (inch
, &input_wait_mask
);
3469 FD_SET (inch
, &non_keyboard_wait_mask
);
3472 if (inch
> max_process_desc
)
3473 max_process_desc
= inch
;
3475 tem
= Fplist_member (contact
, QCcoding
);
3476 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3477 tem
= Qnil
; /* No error message (too late!). */
3480 /* Setup coding systems for communicating with the network stream. */
3481 struct gcpro gcpro1
;
3482 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3483 Lisp_Object coding_systems
= Qt
;
3484 Lisp_Object fargs
[5], val
;
3488 val
= XCAR (XCDR (tem
));
3492 else if (!NILP (Vcoding_system_for_read
))
3493 val
= Vcoding_system_for_read
;
3494 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3495 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3496 /* We dare not decode end-of-line format by setting VAL to
3497 Qraw_text, because the existing Emacs Lisp libraries
3498 assume that they receive bare code including a sequence of
3503 if (NILP (host
) || NILP (service
))
3504 coding_systems
= Qnil
;
3507 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3508 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3510 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3513 if (CONSP (coding_systems
))
3514 val
= XCAR (coding_systems
);
3515 else if (CONSP (Vdefault_process_coding_system
))
3516 val
= XCAR (Vdefault_process_coding_system
);
3520 p
->decode_coding_system
= val
;
3524 val
= XCAR (XCDR (tem
));
3528 else if (!NILP (Vcoding_system_for_write
))
3529 val
= Vcoding_system_for_write
;
3530 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3534 if (EQ (coding_systems
, Qt
))
3536 if (NILP (host
) || NILP (service
))
3537 coding_systems
= Qnil
;
3540 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3541 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3543 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3547 if (CONSP (coding_systems
))
3548 val
= XCDR (coding_systems
);
3549 else if (CONSP (Vdefault_process_coding_system
))
3550 val
= XCDR (Vdefault_process_coding_system
);
3554 p
->encode_coding_system
= val
;
3556 setup_process_coding_systems (proc
);
3558 p
->decoding_buf
= empty_unibyte_string
;
3559 p
->decoding_carryover
= 0;
3560 p
->encoding_buf
= empty_unibyte_string
;
3562 p
->inherit_coding_system_flag
3563 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3570 #if defined (HAVE_NET_IF_H)
3573 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3574 doc
: /* Return an alist of all network interfaces and their network address.
3575 Each element is a cons, the car of which is a string containing the
3576 interface name, and the cdr is the network address in internal
3577 format; see the description of ADDRESS in `make-network-process'. */)
3580 struct ifconf ifconf
;
3581 struct ifreq
*ifreq
;
3583 ptrdiff_t buf_size
= 512;
3587 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3593 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3594 ifconf
.ifc_buf
= buf
;
3595 ifconf
.ifc_len
= buf_size
;
3596 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3603 while (ifconf
.ifc_len
== buf_size
);
3608 ifreq
= ifconf
.ifc_req
;
3609 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3611 struct ifreq
*ifq
= ifreq
;
3612 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3613 #define SIZEOF_IFREQ(sif) \
3614 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3615 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3617 int len
= SIZEOF_IFREQ (ifq
);
3619 int len
= sizeof (*ifreq
);
3621 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3623 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3625 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3628 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3629 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3630 res
= Fcons (Fcons (build_string (namebuf
),
3631 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3632 sizeof (struct sockaddr
))),
3639 #endif /* SIOCGIFCONF */
3641 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3645 const char *flag_sym
;
3648 static const struct ifflag_def ifflag_table
[] = {
3652 #ifdef IFF_BROADCAST
3653 { IFF_BROADCAST
, "broadcast" },
3656 { IFF_DEBUG
, "debug" },
3659 { IFF_LOOPBACK
, "loopback" },
3661 #ifdef IFF_POINTOPOINT
3662 { IFF_POINTOPOINT
, "pointopoint" },
3665 { IFF_RUNNING
, "running" },
3668 { IFF_NOARP
, "noarp" },
3671 { IFF_PROMISC
, "promisc" },
3673 #ifdef IFF_NOTRAILERS
3674 #ifdef NS_IMPL_COCOA
3675 /* Really means smart, notrailers is obsolete */
3676 { IFF_NOTRAILERS
, "smart" },
3678 { IFF_NOTRAILERS
, "notrailers" },
3682 { IFF_ALLMULTI
, "allmulti" },
3685 { IFF_MASTER
, "master" },
3688 { IFF_SLAVE
, "slave" },
3690 #ifdef IFF_MULTICAST
3691 { IFF_MULTICAST
, "multicast" },
3694 { IFF_PORTSEL
, "portsel" },
3696 #ifdef IFF_AUTOMEDIA
3697 { IFF_AUTOMEDIA
, "automedia" },
3700 { IFF_DYNAMIC
, "dynamic" },
3703 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3706 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3709 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3712 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3715 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3720 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3721 doc
: /* Return information about network interface named IFNAME.
3722 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3723 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3724 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3725 FLAGS is the current flags of the interface. */)
3726 (Lisp_Object ifname
)
3729 Lisp_Object res
= Qnil
;
3733 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3734 && defined HAVE_GETIFADDRS && defined LLADDR)
3735 struct ifaddrs
*ifap
;
3738 CHECK_STRING (ifname
);
3740 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3741 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3743 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3748 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3749 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3751 int flags
= rq
.ifr_flags
;
3752 const struct ifflag_def
*fp
;
3755 /* If flags is smaller than int (i.e. short) it may have the high bit set
3756 due to IFF_MULTICAST. In that case, sign extending it into
3758 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3759 flags
= (unsigned short) rq
.ifr_flags
;
3762 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3764 if (flags
& fp
->flag_bit
)
3766 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3767 flags
-= fp
->flag_bit
;
3770 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3774 elt
= Fcons (make_number (fnum
), elt
);
3779 res
= Fcons (elt
, res
);
3782 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3783 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3785 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3786 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3790 for (n
= 0; n
< 6; n
++)
3791 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3792 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3794 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3795 if (getifaddrs (&ifap
) != -1)
3797 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3798 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3801 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3803 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3804 unsigned char linkaddr
[6];
3807 if (it
->ifa_addr
->sa_family
!= AF_LINK
3808 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3809 || sdl
->sdl_alen
!= 6)
3812 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3813 for (n
= 0; n
< 6; n
++)
3814 p
->contents
[n
] = make_number (linkaddr
[n
]);
3816 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3820 #ifdef HAVE_FREEIFADDRS
3824 #endif /* HAVE_GETIFADDRS && LLADDR */
3826 res
= Fcons (elt
, res
);
3829 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3830 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3833 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3834 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3836 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3840 res
= Fcons (elt
, res
);
3843 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3844 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3847 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3850 res
= Fcons (elt
, res
);
3853 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3854 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3857 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3860 res
= Fcons (elt
, res
);
3864 return any
? res
: Qnil
;
3867 #endif /* defined (HAVE_NET_IF_H) */
3869 /* Turn off input and output for process PROC. */
3872 deactivate_process (Lisp_Object proc
)
3874 register int inchannel
, outchannel
;
3875 register struct Lisp_Process
*p
= XPROCESS (proc
);
3878 /* Delete GnuTLS structures in PROC, if any. */
3879 emacs_gnutls_deinit (proc
);
3880 #endif /* HAVE_GNUTLS */
3882 inchannel
= p
->infd
;
3883 outchannel
= p
->outfd
;
3885 #ifdef ADAPTIVE_READ_BUFFERING
3886 if (p
->read_output_delay
> 0)
3888 if (--process_output_delay_count
< 0)
3889 process_output_delay_count
= 0;
3890 p
->read_output_delay
= 0;
3891 p
->read_output_skip
= 0;
3897 /* Beware SIGCHLD hereabouts. */
3898 flush_pending_output (inchannel
);
3899 emacs_close (inchannel
);
3900 if (outchannel
>= 0 && outchannel
!= inchannel
)
3901 emacs_close (outchannel
);
3905 #ifdef DATAGRAM_SOCKETS
3906 if (DATAGRAM_CHAN_P (inchannel
))
3908 xfree (datagram_address
[inchannel
].sa
);
3909 datagram_address
[inchannel
].sa
= 0;
3910 datagram_address
[inchannel
].len
= 0;
3913 chan_process
[inchannel
] = Qnil
;
3914 FD_CLR (inchannel
, &input_wait_mask
);
3915 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3916 #ifdef NON_BLOCKING_CONNECT
3917 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3919 FD_CLR (inchannel
, &connect_wait_mask
);
3920 FD_CLR (inchannel
, &write_mask
);
3921 if (--num_pending_connects
< 0)
3925 if (inchannel
== max_process_desc
)
3928 /* We just closed the highest-numbered process input descriptor,
3929 so recompute the highest-numbered one now. */
3930 max_process_desc
= 0;
3931 for (i
= 0; i
< MAXDESC
; i
++)
3932 if (!NILP (chan_process
[i
]))
3933 max_process_desc
= i
;
3939 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3941 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3942 It is read into the process' buffers or given to their filter functions.
3943 Non-nil arg PROCESS means do not return until some output has been received
3946 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3947 and milliseconds to wait; return after that much time whether or not
3948 there is any subprocess output. If SECONDS is a floating point number,
3949 it specifies a fractional number of seconds to wait.
3950 The MILLISEC argument is obsolete and should be avoided.
3952 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3953 from PROCESS, suspending reading output from other processes.
3954 If JUST-THIS-ONE is an integer, don't run any timers either.
3955 Return non-nil if we received any output before the timeout expired. */)
3956 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3958 int secs
, usecs
= 0;
3960 if (! NILP (process
))
3961 CHECK_PROCESS (process
);
3963 just_this_one
= Qnil
;
3965 if (!NILP (millisec
))
3966 { /* Obsolete calling convention using integers rather than floats. */
3967 CHECK_NUMBER (millisec
);
3969 seconds
= make_float (XINT (millisec
) / 1000.0);
3972 CHECK_NUMBER (seconds
);
3973 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3977 if (!NILP (seconds
))
3979 if (INTEGERP (seconds
))
3980 secs
= XINT (seconds
);
3981 else if (FLOATP (seconds
))
3983 double timeout
= XFLOAT_DATA (seconds
);
3984 secs
= (int) timeout
;
3985 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3988 wrong_type_argument (Qnumberp
, seconds
);
3990 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3991 secs
= -1, usecs
= 0;
3994 secs
= NILP (process
) ? -1 : 0;
3997 (wait_reading_process_output (secs
, usecs
, 0, 0,
3999 !NILP (process
) ? XPROCESS (process
) : NULL
,
4000 NILP (just_this_one
) ? 0 :
4001 !INTEGERP (just_this_one
) ? 1 : -1)
4005 /* Accept a connection for server process SERVER on CHANNEL. */
4007 static int connect_counter
= 0;
4010 server_accept_connection (Lisp_Object server
, int channel
)
4012 Lisp_Object proc
, caller
, name
, buffer
;
4013 Lisp_Object contact
, host
, service
;
4014 struct Lisp_Process
*ps
= XPROCESS (server
);
4015 struct Lisp_Process
*p
;
4019 struct sockaddr_in in
;
4021 struct sockaddr_in6 in6
;
4023 #ifdef HAVE_LOCAL_SOCKETS
4024 struct sockaddr_un un
;
4027 socklen_t len
= sizeof saddr
;
4029 s
= accept (channel
, &saddr
.sa
, &len
);
4038 if (code
== EWOULDBLOCK
)
4042 if (!NILP (ps
->log
))
4043 call3 (ps
->log
, server
, Qnil
,
4044 concat3 (build_string ("accept failed with code"),
4045 Fnumber_to_string (make_number (code
)),
4046 build_string ("\n")));
4052 /* Setup a new process to handle the connection. */
4054 /* Generate a unique identification of the caller, and build contact
4055 information for this process. */
4058 switch (saddr
.sa
.sa_family
)
4062 Lisp_Object args
[5];
4063 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4064 args
[0] = build_string ("%d.%d.%d.%d");
4065 args
[1] = make_number (*ip
++);
4066 args
[2] = make_number (*ip
++);
4067 args
[3] = make_number (*ip
++);
4068 args
[4] = make_number (*ip
++);
4069 host
= Fformat (5, args
);
4070 service
= make_number (ntohs (saddr
.in
.sin_port
));
4072 args
[0] = build_string (" <%s:%d>");
4075 caller
= Fformat (3, args
);
4082 Lisp_Object args
[9];
4083 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4085 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4086 for (i
= 0; i
< 8; i
++)
4087 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4088 host
= Fformat (9, args
);
4089 service
= make_number (ntohs (saddr
.in
.sin_port
));
4091 args
[0] = build_string (" <[%s]:%d>");
4094 caller
= Fformat (3, args
);
4099 #ifdef HAVE_LOCAL_SOCKETS
4103 caller
= Fnumber_to_string (make_number (connect_counter
));
4104 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4108 /* Create a new buffer name for this process if it doesn't have a
4109 filter. The new buffer name is based on the buffer name or
4110 process name of the server process concatenated with the caller
4113 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4117 buffer
= ps
->buffer
;
4119 buffer
= Fbuffer_name (buffer
);
4124 buffer
= concat2 (buffer
, caller
);
4125 buffer
= Fget_buffer_create (buffer
);
4129 /* Generate a unique name for the new server process. Combine the
4130 server process name with the caller identification. */
4132 name
= concat2 (ps
->name
, caller
);
4133 proc
= make_process (name
);
4135 chan_process
[s
] = proc
;
4138 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4141 fcntl (s
, F_SETFL
, O_NDELAY
);
4145 p
= XPROCESS (proc
);
4147 /* Build new contact information for this setup. */
4148 contact
= Fcopy_sequence (ps
->childp
);
4149 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4150 contact
= Fplist_put (contact
, QChost
, host
);
4151 if (!NILP (service
))
4152 contact
= Fplist_put (contact
, QCservice
, service
);
4153 contact
= Fplist_put (contact
, QCremote
,
4154 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4155 #ifdef HAVE_GETSOCKNAME
4157 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4158 contact
= Fplist_put (contact
, QClocal
,
4159 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4162 p
->childp
= contact
;
4163 p
->plist
= Fcopy_sequence (ps
->plist
);
4167 p
->sentinel
= ps
->sentinel
;
4168 p
->filter
= ps
->filter
;
4175 /* Client processes for accepted connections are not stopped initially. */
4176 if (!EQ (p
->filter
, Qt
))
4178 FD_SET (s
, &input_wait_mask
);
4179 FD_SET (s
, &non_keyboard_wait_mask
);
4182 if (s
> max_process_desc
)
4183 max_process_desc
= s
;
4185 /* Setup coding system for new process based on server process.
4186 This seems to be the proper thing to do, as the coding system
4187 of the new process should reflect the settings at the time the
4188 server socket was opened; not the current settings. */
4190 p
->decode_coding_system
= ps
->decode_coding_system
;
4191 p
->encode_coding_system
= ps
->encode_coding_system
;
4192 setup_process_coding_systems (proc
);
4194 p
->decoding_buf
= empty_unibyte_string
;
4195 p
->decoding_carryover
= 0;
4196 p
->encoding_buf
= empty_unibyte_string
;
4198 p
->inherit_coding_system_flag
4199 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4201 if (!NILP (ps
->log
))
4202 call3 (ps
->log
, server
, proc
,
4203 concat3 (build_string ("accept from "),
4204 (STRINGP (host
) ? host
: build_string ("-")),
4205 build_string ("\n")));
4207 if (!NILP (p
->sentinel
))
4208 exec_sentinel (proc
,
4209 concat3 (build_string ("open from "),
4210 (STRINGP (host
) ? host
: build_string ("-")),
4211 build_string ("\n")));
4214 /* This variable is different from waiting_for_input in keyboard.c.
4215 It is used to communicate to a lisp process-filter/sentinel (via the
4216 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4217 for user-input when that process-filter was called.
4218 waiting_for_input cannot be used as that is by definition 0 when
4219 lisp code is being evalled.
4220 This is also used in record_asynch_buffer_change.
4221 For that purpose, this must be 0
4222 when not inside wait_reading_process_output. */
4223 static int waiting_for_user_input_p
;
4226 wait_reading_process_output_unwind (Lisp_Object data
)
4228 waiting_for_user_input_p
= XINT (data
);
4232 /* This is here so breakpoints can be put on it. */
4234 wait_reading_process_output_1 (void)
4238 /* Use a wrapper around select to work around a bug in gdb 5.3.
4239 Normally, the wrapper is optimized away by inlining.
4241 If emacs is stopped inside select, the gdb backtrace doesn't
4242 show the function which called select, so it is practically
4243 impossible to step through wait_reading_process_output. */
4247 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4249 return select (n
, rfd
, wfd
, xfd
, tmo
);
4251 #define select select_wrapper
4254 /* Read and dispose of subprocess output while waiting for timeout to
4255 elapse and/or keyboard input to be available.
4258 timeout in seconds, or
4259 zero for no limit, or
4260 -1 means gobble data immediately available but don't wait for any.
4263 an additional duration to wait, measured in microseconds.
4264 If this is nonzero and time_limit is 0, then the timeout
4265 consists of MICROSECS only.
4267 READ_KBD is a lisp value:
4268 0 to ignore keyboard input, or
4269 1 to return when input is available, or
4270 -1 meaning caller will actually read the input, so don't throw to
4271 the quit handler, or
4273 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4274 output that arrives.
4276 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4277 (and gobble terminal input into the buffer if any arrives).
4279 If WAIT_PROC is specified, wait until something arrives from that
4280 process. The return value is true if we read some input from
4283 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4284 (suspending output from other processes). A negative value
4285 means don't run any timers either.
4287 If WAIT_PROC is specified, then the function returns true if we
4288 received input from that process before the timeout elapsed.
4289 Otherwise, return true if we received input from any process. */
4292 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4294 Lisp_Object wait_for_cell
,
4295 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4297 register int channel
, nfds
;
4298 SELECT_TYPE Available
;
4299 SELECT_TYPE Writeok
;
4301 int check_delay
, no_avail
;
4304 EMACS_TIME timeout
, end_time
;
4305 int wait_channel
= -1;
4306 int got_some_input
= 0;
4307 int count
= SPECPDL_INDEX ();
4309 FD_ZERO (&Available
);
4312 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4313 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4314 message ("Blocking call to accept-process-output with quit inhibited!!");
4316 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4317 if (wait_proc
!= NULL
)
4318 wait_channel
= wait_proc
->infd
;
4320 record_unwind_protect (wait_reading_process_output_unwind
,
4321 make_number (waiting_for_user_input_p
));
4322 waiting_for_user_input_p
= read_kbd
;
4324 /* Since we may need to wait several times,
4325 compute the absolute time to return at. */
4326 if (time_limit
|| microsecs
)
4328 EMACS_GET_TIME (end_time
);
4329 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4330 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4335 int timeout_reduced_for_timers
= 0;
4337 /* If calling from keyboard input, do not quit
4338 since we want to return C-g as an input character.
4339 Otherwise, do pending quit if requested. */
4344 process_pending_signals ();
4347 /* Exit now if the cell we're waiting for became non-nil. */
4348 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4351 /* Compute time from now till when time limit is up */
4352 /* Exit if already run out */
4353 if (time_limit
== -1)
4355 /* -1 specified for timeout means
4356 gobble output available now
4357 but don't wait at all. */
4359 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4361 else if (time_limit
|| microsecs
)
4363 EMACS_GET_TIME (timeout
);
4364 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4365 if (EMACS_TIME_NEG_P (timeout
))
4370 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4373 /* Normally we run timers here.
4374 But not if wait_for_cell; in those cases,
4375 the wait is supposed to be short,
4376 and those callers cannot handle running arbitrary Lisp code here. */
4377 if (NILP (wait_for_cell
)
4378 && just_wait_proc
>= 0)
4380 EMACS_TIME timer_delay
;
4384 int old_timers_run
= timers_run
;
4385 struct buffer
*old_buffer
= current_buffer
;
4386 Lisp_Object old_window
= selected_window
;
4388 timer_delay
= timer_check ();
4390 /* If a timer has run, this might have changed buffers
4391 an alike. Make read_key_sequence aware of that. */
4392 if (timers_run
!= old_timers_run
4393 && (old_buffer
!= current_buffer
4394 || !EQ (old_window
, selected_window
))
4395 && waiting_for_user_input_p
== -1)
4396 record_asynch_buffer_change ();
4398 if (timers_run
!= old_timers_run
&& do_display
)
4399 /* We must retry, since a timer may have requeued itself
4400 and that could alter the time_delay. */
4401 redisplay_preserve_echo_area (9);
4405 while (!detect_input_pending ());
4407 /* If there is unread keyboard input, also return. */
4409 && requeued_events_pending_p ())
4412 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4414 EMACS_TIME difference
;
4415 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4416 if (EMACS_TIME_NEG_P (difference
))
4418 timeout
= timer_delay
;
4419 timeout_reduced_for_timers
= 1;
4422 /* If time_limit is -1, we are not going to wait at all. */
4423 else if (time_limit
!= -1)
4425 /* This is so a breakpoint can be put here. */
4426 wait_reading_process_output_1 ();
4430 /* Cause C-g and alarm signals to take immediate action,
4431 and cause input available signals to zero out timeout.
4433 It is important that we do this before checking for process
4434 activity. If we get a SIGCHLD after the explicit checks for
4435 process activity, timeout is the only way we will know. */
4437 set_waiting_for_input (&timeout
);
4439 /* If status of something has changed, and no input is
4440 available, notify the user of the change right away. After
4441 this explicit check, we'll let the SIGCHLD handler zap
4442 timeout to get our attention. */
4443 if (update_tick
!= process_tick
)
4448 if (kbd_on_hold_p ())
4451 Atemp
= input_wait_mask
;
4454 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4455 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4457 #ifdef NON_BLOCKING_CONNECT
4458 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4462 (SELECT_TYPE
*)0, &timeout
)
4465 /* It's okay for us to do this and then continue with
4466 the loop, since timeout has already been zeroed out. */
4467 clear_waiting_for_input ();
4468 status_notify (NULL
);
4469 if (do_display
) redisplay_preserve_echo_area (13);
4473 /* Don't wait for output from a non-running process. Just
4474 read whatever data has already been received. */
4475 if (wait_proc
&& wait_proc
->raw_status_new
)
4476 update_status (wait_proc
);
4478 && ! EQ (wait_proc
->status
, Qrun
)
4479 && ! EQ (wait_proc
->status
, Qconnect
))
4481 int nread
, total_nread
= 0;
4483 clear_waiting_for_input ();
4484 XSETPROCESS (proc
, wait_proc
);
4486 /* Read data from the process, until we exhaust it. */
4487 while (wait_proc
->infd
>= 0)
4489 nread
= read_process_output (proc
, wait_proc
->infd
);
4496 total_nread
+= nread
;
4500 else if (nread
== -1 && EIO
== errno
)
4504 else if (nread
== -1 && EAGAIN
== errno
)
4508 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4512 if (total_nread
> 0 && do_display
)
4513 redisplay_preserve_echo_area (10);
4518 /* Wait till there is something to do */
4520 if (wait_proc
&& just_wait_proc
)
4522 if (wait_proc
->infd
< 0) /* Terminated */
4524 FD_SET (wait_proc
->infd
, &Available
);
4528 else if (!NILP (wait_for_cell
))
4530 Available
= non_process_wait_mask
;
4537 Available
= non_keyboard_wait_mask
;
4539 Available
= input_wait_mask
;
4540 Writeok
= write_mask
;
4541 #ifdef SELECT_CANT_DO_WRITE_MASK
4546 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4549 /* If frame size has changed or the window is newly mapped,
4550 redisplay now, before we start to wait. There is a race
4551 condition here; if a SIGIO arrives between now and the select
4552 and indicates that a frame is trashed, the select may block
4553 displaying a trashed screen. */
4554 if (frame_garbaged
&& do_display
)
4556 clear_waiting_for_input ();
4557 redisplay_preserve_echo_area (11);
4559 set_waiting_for_input (&timeout
);
4562 /* Skip the `select' call if input is available and we're
4563 waiting for keyboard input or a cell change (which can be
4564 triggered by processing X events). In the latter case, set
4565 nfds to 1 to avoid breaking the loop. */
4567 if ((read_kbd
|| !NILP (wait_for_cell
))
4568 && detect_input_pending ())
4570 nfds
= read_kbd
? 0 : 1;
4577 #ifdef ADAPTIVE_READ_BUFFERING
4578 /* Set the timeout for adaptive read buffering if any
4579 process has non-zero read_output_skip and non-zero
4580 read_output_delay, and we are not reading output for a
4581 specific wait_channel. It is not executed if
4582 Vprocess_adaptive_read_buffering is nil. */
4583 if (process_output_skip
&& check_delay
> 0)
4585 int usecs
= EMACS_USECS (timeout
);
4586 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4587 usecs
= READ_OUTPUT_DELAY_MAX
;
4588 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4590 proc
= chan_process
[channel
];
4593 /* Find minimum non-zero read_output_delay among the
4594 processes with non-zero read_output_skip. */
4595 if (XPROCESS (proc
)->read_output_delay
> 0)
4598 if (!XPROCESS (proc
)->read_output_skip
)
4600 FD_CLR (channel
, &Available
);
4601 XPROCESS (proc
)->read_output_skip
= 0;
4602 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4603 usecs
= XPROCESS (proc
)->read_output_delay
;
4606 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4607 process_output_skip
= 0;
4610 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4612 #elif defined (HAVE_NS)
4617 (max (max_process_desc
, max_input_desc
) + 1,
4619 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4620 (SELECT_TYPE
*)0, &timeout
);
4623 /* GnuTLS buffers data internally. In lowat mode it leaves
4624 some data in the TCP buffers so that select works, but
4625 with custom pull/push functions we need to check if some
4626 data is available in the buffers manually. */
4631 /* We're not waiting on a specific process, so loop
4632 through all the channels and check for data.
4633 This is a workaround needed for some versions of
4634 the gnutls library -- 2.12.14 has been confirmed
4636 http://comments.gmane.org/gmane.emacs.devel/145074 */
4637 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4638 if (! NILP (chan_process
[channel
]))
4640 struct Lisp_Process
*p
=
4641 XPROCESS (chan_process
[channel
]);
4642 if (p
&& p
->gnutls_p
&& p
->infd
4643 && ((emacs_gnutls_record_check_pending
4648 FD_SET (p
->infd
, &Available
);
4654 /* Check this specific channel. */
4655 if (wait_proc
->gnutls_p
/* Check for valid process. */
4656 /* Do we have pending data? */
4657 && ((emacs_gnutls_record_check_pending
4658 (wait_proc
->gnutls_state
))
4662 /* Set to Available. */
4663 FD_SET (wait_proc
->infd
, &Available
);
4672 /* Make C-g and alarm signals set flags again */
4673 clear_waiting_for_input ();
4675 /* If we woke up due to SIGWINCH, actually change size now. */
4676 do_pending_window_change (0);
4678 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4679 /* We wanted the full specified time, so return now. */
4683 if (xerrno
== EINTR
)
4685 else if (xerrno
== EBADF
)
4688 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4689 the child's closure of the pts gives the parent a SIGHUP, and
4690 the ptc file descriptor is automatically closed,
4691 yielding EBADF here or at select() call above.
4692 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4693 in m/ibmrt-aix.h), and here we just ignore the select error.
4694 Cleanup occurs c/o status_notify after SIGCLD. */
4695 no_avail
= 1; /* Cannot depend on values returned */
4701 error ("select error: %s", emacs_strerror (xerrno
));
4706 FD_ZERO (&Available
);
4710 #if 0 /* When polling is used, interrupt_input is 0,
4711 so get_input_pending should read the input.
4712 So this should not be needed. */
4713 /* If we are using polling for input,
4714 and we see input available, make it get read now.
4715 Otherwise it might not actually get read for a second.
4716 And on hpux, since we turn off polling in wait_reading_process_output,
4717 it might never get read at all if we don't spend much time
4718 outside of wait_reading_process_output. */
4719 if (read_kbd
&& interrupt_input
4720 && keyboard_bit_set (&Available
)
4721 && input_polling_used ())
4722 kill (getpid (), SIGALRM
);
4725 /* Check for keyboard input */
4726 /* If there is any, return immediately
4727 to give it higher priority than subprocesses */
4731 int old_timers_run
= timers_run
;
4732 struct buffer
*old_buffer
= current_buffer
;
4733 Lisp_Object old_window
= selected_window
;
4736 if (detect_input_pending_run_timers (do_display
))
4738 swallow_events (do_display
);
4739 if (detect_input_pending_run_timers (do_display
))
4743 /* If a timer has run, this might have changed buffers
4744 an alike. Make read_key_sequence aware of that. */
4745 if (timers_run
!= old_timers_run
4746 && waiting_for_user_input_p
== -1
4747 && (old_buffer
!= current_buffer
4748 || !EQ (old_window
, selected_window
)))
4749 record_asynch_buffer_change ();
4755 /* If there is unread keyboard input, also return. */
4757 && requeued_events_pending_p ())
4760 /* If we are not checking for keyboard input now,
4761 do process events (but don't run any timers).
4762 This is so that X events will be processed.
4763 Otherwise they may have to wait until polling takes place.
4764 That would causes delays in pasting selections, for example.
4766 (We used to do this only if wait_for_cell.) */
4767 if (read_kbd
== 0 && detect_input_pending ())
4769 swallow_events (do_display
);
4770 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4771 if (detect_input_pending ())
4776 /* Exit now if the cell we're waiting for became non-nil. */
4777 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4781 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4782 go read it. This can happen with X on BSD after logging out.
4783 In that case, there really is no input and no SIGIO,
4784 but select says there is input. */
4786 if (read_kbd
&& interrupt_input
4787 && keyboard_bit_set (&Available
) && ! noninteractive
)
4788 kill (getpid (), SIGIO
);
4792 got_some_input
|= nfds
> 0;
4794 /* If checking input just got us a size-change event from X,
4795 obey it now if we should. */
4796 if (read_kbd
|| ! NILP (wait_for_cell
))
4797 do_pending_window_change (0);
4799 /* Check for data from a process. */
4800 if (no_avail
|| nfds
== 0)
4803 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4805 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4806 if (FD_ISSET (channel
, &Available
)
4808 && (d
->condition
& FOR_READ
) != 0)
4809 d
->func (channel
, d
->data
, 1);
4810 if (FD_ISSET (channel
, &write_mask
)
4812 && (d
->condition
& FOR_WRITE
) != 0)
4813 d
->func (channel
, d
->data
, 0);
4816 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4818 if (FD_ISSET (channel
, &Available
)
4819 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4820 && !FD_ISSET (channel
, &non_process_wait_mask
))
4824 /* If waiting for this channel, arrange to return as
4825 soon as no more input to be processed. No more
4827 if (wait_channel
== channel
)
4833 proc
= chan_process
[channel
];
4837 /* If this is a server stream socket, accept connection. */
4838 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4840 server_accept_connection (proc
, channel
);
4844 /* Read data from the process, starting with our
4845 buffered-ahead character if we have one. */
4847 nread
= read_process_output (proc
, channel
);
4850 /* Since read_process_output can run a filter,
4851 which can call accept-process-output,
4852 don't try to read from any other processes
4853 before doing the select again. */
4854 FD_ZERO (&Available
);
4857 redisplay_preserve_echo_area (12);
4860 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4863 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4864 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4866 else if (nread
== -1 && errno
== EAGAIN
)
4870 else if (nread
== -1 && errno
== EAGAIN
)
4872 /* Note that we cannot distinguish between no input
4873 available now and a closed pipe.
4874 With luck, a closed pipe will be accompanied by
4875 subprocess termination and SIGCHLD. */
4876 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4878 #endif /* O_NDELAY */
4879 #endif /* O_NONBLOCK */
4881 /* On some OSs with ptys, when the process on one end of
4882 a pty exits, the other end gets an error reading with
4883 errno = EIO instead of getting an EOF (0 bytes read).
4884 Therefore, if we get an error reading and errno =
4885 EIO, just continue, because the child process has
4886 exited and should clean itself up soon (e.g. when we
4889 However, it has been known to happen that the SIGCHLD
4890 got lost. So raise the signal again just in case.
4892 else if (nread
== -1 && errno
== EIO
)
4894 /* Don't do anything if only a pty, with no associated
4895 process (bug#10933). */
4896 if (XPROCESS (proc
)->pid
!= -2) {
4897 /* Clear the descriptor now, so we only raise the signal
4899 FD_CLR (channel
, &input_wait_mask
);
4900 FD_CLR (channel
, &non_keyboard_wait_mask
);
4902 kill (getpid (), SIGCHLD
);
4905 #endif /* HAVE_PTYS */
4906 /* If we can detect process termination, don't consider the
4907 process gone just because its pipe is closed. */
4909 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4914 /* Preserve status of processes already terminated. */
4915 XPROCESS (proc
)->tick
= ++process_tick
;
4916 deactivate_process (proc
);
4917 if (XPROCESS (proc
)->raw_status_new
)
4918 update_status (XPROCESS (proc
));
4919 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4920 XPROCESS (proc
)->status
4921 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4924 #ifdef NON_BLOCKING_CONNECT
4925 if (FD_ISSET (channel
, &Writeok
)
4926 && FD_ISSET (channel
, &connect_wait_mask
))
4928 struct Lisp_Process
*p
;
4930 FD_CLR (channel
, &connect_wait_mask
);
4931 FD_CLR (channel
, &write_mask
);
4932 if (--num_pending_connects
< 0)
4935 proc
= chan_process
[channel
];
4939 p
= XPROCESS (proc
);
4942 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4943 So only use it on systems where it is known to work. */
4945 socklen_t xlen
= sizeof (xerrno
);
4946 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4951 struct sockaddr pname
;
4952 int pnamelen
= sizeof (pname
);
4954 /* If connection failed, getpeername will fail. */
4956 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4958 /* Obtain connect failure code through error slippage. */
4961 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4968 p
->tick
= ++process_tick
;
4969 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4970 deactivate_process (proc
);
4975 /* Execute the sentinel here. If we had relied on
4976 status_notify to do it later, it will read input
4977 from the process before calling the sentinel. */
4978 exec_sentinel (proc
, build_string ("open\n"));
4979 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4981 FD_SET (p
->infd
, &input_wait_mask
);
4982 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4986 #endif /* NON_BLOCKING_CONNECT */
4987 } /* end for each file descriptor */
4988 } /* end while exit conditions not met */
4990 unbind_to (count
, Qnil
);
4992 /* If calling from keyboard input, do not quit
4993 since we want to return C-g as an input character.
4994 Otherwise, do pending quit if requested. */
4997 /* Prevent input_pending from remaining set if we quit. */
4998 clear_input_pending ();
5002 return got_some_input
;
5005 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5008 read_process_output_call (Lisp_Object fun_and_args
)
5010 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5014 read_process_output_error_handler (Lisp_Object error_val
)
5016 cmd_error_internal (error_val
, "error in process filter: ");
5018 update_echo_area ();
5019 Fsleep_for (make_number (2), Qnil
);
5023 /* Read pending output from the process channel,
5024 starting with our buffered-ahead character if we have one.
5025 Yield number of decoded characters read.
5027 This function reads at most 4096 characters.
5028 If you want to read all available subprocess output,
5029 you must call it repeatedly until it returns zero.
5031 The characters read are decoded according to PROC's coding-system
5035 read_process_output (Lisp_Object proc
, register int channel
)
5037 register ssize_t nbytes
;
5039 register Lisp_Object outstream
;
5040 register struct Lisp_Process
*p
= XPROCESS (proc
);
5041 register EMACS_INT opoint
;
5042 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5043 int carryover
= p
->decoding_carryover
;
5045 int count
= SPECPDL_INDEX ();
5046 Lisp_Object odeactivate
;
5048 chars
= (char *) alloca (carryover
+ readmax
);
5050 /* See the comment above. */
5051 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5053 #ifdef DATAGRAM_SOCKETS
5054 /* We have a working select, so proc_buffered_char is always -1. */
5055 if (DATAGRAM_CHAN_P (channel
))
5057 socklen_t len
= datagram_address
[channel
].len
;
5058 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5059 0, datagram_address
[channel
].sa
, &len
);
5064 int buffered
= 0 <= proc_buffered_char
[channel
];
5067 chars
[carryover
] = proc_buffered_char
[channel
];
5068 proc_buffered_char
[channel
] = -1;
5072 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5073 readmax
- buffered
);
5076 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5077 readmax
- buffered
);
5078 #ifdef ADAPTIVE_READ_BUFFERING
5079 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5081 int delay
= p
->read_output_delay
;
5084 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5087 process_output_delay_count
++;
5088 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5091 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5093 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5095 process_output_delay_count
--;
5097 p
->read_output_delay
= delay
;
5100 p
->read_output_skip
= 1;
5101 process_output_skip
= 1;
5106 nbytes
+= buffered
&& nbytes
<= 0;
5109 p
->decoding_carryover
= 0;
5111 /* At this point, NBYTES holds number of bytes just received
5112 (including the one in proc_buffered_char[channel]). */
5115 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5117 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5120 /* Now set NBYTES how many bytes we must decode. */
5121 nbytes
+= carryover
;
5123 odeactivate
= Vdeactivate_mark
;
5124 /* There's no good reason to let process filters change the current
5125 buffer, and many callers of accept-process-output, sit-for, and
5126 friends don't expect current-buffer to be changed from under them. */
5127 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5129 /* Read and dispose of the process output. */
5130 outstream
= p
->filter
;
5131 if (!NILP (outstream
))
5134 int outer_running_asynch_code
= running_asynch_code
;
5135 int waiting
= waiting_for_user_input_p
;
5137 /* No need to gcpro these, because all we do with them later
5138 is test them for EQness, and none of them should be a string. */
5140 Lisp_Object obuffer
, okeymap
;
5141 XSETBUFFER (obuffer
, current_buffer
);
5142 okeymap
= BVAR (current_buffer
, keymap
);
5145 /* We inhibit quit here instead of just catching it so that
5146 hitting ^G when a filter happens to be running won't screw
5148 specbind (Qinhibit_quit
, Qt
);
5149 specbind (Qlast_nonmenu_event
, Qt
);
5151 /* In case we get recursively called,
5152 and we already saved the match data nonrecursively,
5153 save the same match data in safely recursive fashion. */
5154 if (outer_running_asynch_code
)
5157 /* Don't clobber the CURRENT match data, either! */
5158 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5159 restore_search_regs ();
5160 record_unwind_save_match_data ();
5161 Fset_match_data (tem
, Qt
);
5164 /* For speed, if a search happens within this code,
5165 save the match data in a special nonrecursive fashion. */
5166 running_asynch_code
= 1;
5168 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5169 text
= coding
->dst_object
;
5170 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5171 /* A new coding system might be found. */
5172 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5174 p
->decode_coding_system
= Vlast_coding_system_used
;
5176 /* Don't call setup_coding_system for
5177 proc_decode_coding_system[channel] here. It is done in
5178 detect_coding called via decode_coding above. */
5180 /* If a coding system for encoding is not yet decided, we set
5181 it as the same as coding-system for decoding.
5183 But, before doing that we must check if
5184 proc_encode_coding_system[p->outfd] surely points to a
5185 valid memory because p->outfd will be changed once EOF is
5186 sent to the process. */
5187 if (NILP (p
->encode_coding_system
)
5188 && proc_encode_coding_system
[p
->outfd
])
5190 p
->encode_coding_system
5191 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5192 setup_coding_system (p
->encode_coding_system
,
5193 proc_encode_coding_system
[p
->outfd
]);
5197 if (coding
->carryover_bytes
> 0)
5199 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5200 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5201 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5202 coding
->carryover_bytes
);
5203 p
->decoding_carryover
= coding
->carryover_bytes
;
5205 if (SBYTES (text
) > 0)
5206 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5207 sometimes it's simply wrong to wrap (e.g. when called from
5208 accept-process-output). */
5209 internal_condition_case_1 (read_process_output_call
,
5211 Fcons (proc
, Fcons (text
, Qnil
))),
5212 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5213 read_process_output_error_handler
);
5215 /* If we saved the match data nonrecursively, restore it now. */
5216 restore_search_regs ();
5217 running_asynch_code
= outer_running_asynch_code
;
5219 /* Restore waiting_for_user_input_p as it was
5220 when we were called, in case the filter clobbered it. */
5221 waiting_for_user_input_p
= waiting
;
5223 #if 0 /* Call record_asynch_buffer_change unconditionally,
5224 because we might have changed minor modes or other things
5225 that affect key bindings. */
5226 if (! EQ (Fcurrent_buffer (), obuffer
)
5227 || ! EQ (current_buffer
->keymap
, okeymap
))
5229 /* But do it only if the caller is actually going to read events.
5230 Otherwise there's no need to make him wake up, and it could
5231 cause trouble (for example it would make sit_for return). */
5232 if (waiting_for_user_input_p
== -1)
5233 record_asynch_buffer_change ();
5236 /* If no filter, write into buffer if it isn't dead. */
5237 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5239 Lisp_Object old_read_only
;
5240 EMACS_INT old_begv
, old_zv
;
5241 EMACS_INT old_begv_byte
, old_zv_byte
;
5242 EMACS_INT before
, before_byte
;
5243 EMACS_INT opoint_byte
;
5247 Fset_buffer (p
->buffer
);
5249 opoint_byte
= PT_BYTE
;
5250 old_read_only
= BVAR (current_buffer
, read_only
);
5253 old_begv_byte
= BEGV_BYTE
;
5254 old_zv_byte
= ZV_BYTE
;
5256 BVAR (current_buffer
, read_only
) = Qnil
;
5258 /* Insert new output into buffer
5259 at the current end-of-output marker,
5260 thus preserving logical ordering of input and output. */
5261 if (XMARKER (p
->mark
)->buffer
)
5262 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5263 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5266 SET_PT_BOTH (ZV
, ZV_BYTE
);
5268 before_byte
= PT_BYTE
;
5270 /* If the output marker is outside of the visible region, save
5271 the restriction and widen. */
5272 if (! (BEGV
<= PT
&& PT
<= ZV
))
5275 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5276 text
= coding
->dst_object
;
5277 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5278 /* A new coding system might be found. See the comment in the
5279 similar code in the previous `if' block. */
5280 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5282 p
->decode_coding_system
= Vlast_coding_system_used
;
5283 if (NILP (p
->encode_coding_system
)
5284 && proc_encode_coding_system
[p
->outfd
])
5286 p
->encode_coding_system
5287 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5288 setup_coding_system (p
->encode_coding_system
,
5289 proc_encode_coding_system
[p
->outfd
]);
5292 if (coding
->carryover_bytes
> 0)
5294 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5295 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5296 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5297 coding
->carryover_bytes
);
5298 p
->decoding_carryover
= coding
->carryover_bytes
;
5300 /* Adjust the multibyteness of TEXT to that of the buffer. */
5301 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5302 != ! STRING_MULTIBYTE (text
))
5303 text
= (STRING_MULTIBYTE (text
)
5304 ? Fstring_as_unibyte (text
)
5305 : Fstring_to_multibyte (text
));
5306 /* Insert before markers in case we are inserting where
5307 the buffer's mark is, and the user's next command is Meta-y. */
5308 insert_from_string_before_markers (text
, 0, 0,
5309 SCHARS (text
), SBYTES (text
), 0);
5311 /* Make sure the process marker's position is valid when the
5312 process buffer is changed in the signal_after_change above.
5313 W3 is known to do that. */
5314 if (BUFFERP (p
->buffer
)
5315 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5316 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5318 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5320 update_mode_lines
++;
5322 /* Make sure opoint and the old restrictions
5323 float ahead of any new text just as point would. */
5324 if (opoint
>= before
)
5326 opoint
+= PT
- before
;
5327 opoint_byte
+= PT_BYTE
- before_byte
;
5329 if (old_begv
> before
)
5331 old_begv
+= PT
- before
;
5332 old_begv_byte
+= PT_BYTE
- before_byte
;
5334 if (old_zv
>= before
)
5336 old_zv
+= PT
- before
;
5337 old_zv_byte
+= PT_BYTE
- before_byte
;
5340 /* If the restriction isn't what it should be, set it. */
5341 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5342 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5345 BVAR (current_buffer
, read_only
) = old_read_only
;
5346 SET_PT_BOTH (opoint
, opoint_byte
);
5348 /* Handling the process output should not deactivate the mark. */
5349 Vdeactivate_mark
= odeactivate
;
5351 unbind_to (count
, Qnil
);
5355 /* Sending data to subprocess */
5357 static jmp_buf send_process_frame
;
5358 static Lisp_Object process_sent_to
;
5360 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5361 static void send_process_trap (int) NO_RETURN
;
5365 send_process_trap (int ignore
)
5367 SIGNAL_THREAD_CHECK (SIGPIPE
);
5368 sigunblock (sigmask (SIGPIPE
));
5369 longjmp (send_process_frame
, 1);
5372 /* Send some data to process PROC.
5373 BUF is the beginning of the data; LEN is the number of characters.
5374 OBJECT is the Lisp object that the data comes from. If OBJECT is
5375 nil or t, it means that the data comes from C string.
5377 If OBJECT is not nil, the data is encoded by PROC's coding-system
5378 for encoding before it is sent.
5380 This function can evaluate Lisp code and can garbage collect. */
5383 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5384 volatile EMACS_INT len
, volatile Lisp_Object object
)
5386 /* Use volatile to protect variables from being clobbered by longjmp. */
5387 struct Lisp_Process
*p
= XPROCESS (proc
);
5389 struct coding_system
*coding
;
5390 struct gcpro gcpro1
;
5391 void (*volatile old_sigpipe
) (int);
5395 if (p
->raw_status_new
)
5397 if (! EQ (p
->status
, Qrun
))
5398 error ("Process %s not running", SDATA (p
->name
));
5400 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5402 coding
= proc_encode_coding_system
[p
->outfd
];
5403 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5405 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5406 || (BUFFERP (object
)
5407 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5410 p
->encode_coding_system
5411 = complement_process_encoding_system (p
->encode_coding_system
);
5412 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5414 /* The coding system for encoding was changed to raw-text
5415 because we sent a unibyte text previously. Now we are
5416 sending a multibyte text, thus we must encode it by the
5417 original coding system specified for the current process.
5419 Another reason we come here is that the coding system
5420 was just complemented and a new one was returned by
5421 complement_process_encoding_system. */
5422 setup_coding_system (p
->encode_coding_system
, coding
);
5423 Vlast_coding_system_used
= p
->encode_coding_system
;
5425 coding
->src_multibyte
= 1;
5429 coding
->src_multibyte
= 0;
5430 /* For sending a unibyte text, character code conversion should
5431 not take place but EOL conversion should. So, setup raw-text
5432 or one of the subsidiary if we have not yet done it. */
5433 if (CODING_REQUIRE_ENCODING (coding
))
5435 if (CODING_REQUIRE_FLUSHING (coding
))
5437 /* But, before changing the coding, we must flush out data. */
5438 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5439 send_process (proc
, "", 0, Qt
);
5440 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5442 setup_coding_system (raw_text_coding_system
5443 (Vlast_coding_system_used
),
5445 coding
->src_multibyte
= 0;
5448 coding
->dst_multibyte
= 0;
5450 if (CODING_REQUIRE_ENCODING (coding
))
5452 coding
->dst_object
= Qt
;
5453 if (BUFFERP (object
))
5455 EMACS_INT from_byte
, from
, to
;
5456 EMACS_INT save_pt
, save_pt_byte
;
5457 struct buffer
*cur
= current_buffer
;
5459 set_buffer_internal (XBUFFER (object
));
5460 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5462 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5463 from
= BYTE_TO_CHAR (from_byte
);
5464 to
= BYTE_TO_CHAR (from_byte
+ len
);
5465 TEMP_SET_PT_BOTH (from
, from_byte
);
5466 encode_coding_object (coding
, object
, from
, from_byte
,
5467 to
, from_byte
+ len
, Qt
);
5468 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5469 set_buffer_internal (cur
);
5471 else if (STRINGP (object
))
5473 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5474 SBYTES (object
), Qt
);
5478 coding
->dst_object
= make_unibyte_string (buf
, len
);
5479 coding
->produced
= len
;
5482 len
= coding
->produced
;
5483 object
= coding
->dst_object
;
5484 buf
= SSDATA (object
);
5487 if (pty_max_bytes
== 0)
5489 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5490 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5491 if (pty_max_bytes
< 0)
5492 pty_max_bytes
= 250;
5494 pty_max_bytes
= 250;
5496 /* Deduct one, to leave space for the eof. */
5500 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5501 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5502 when returning with longjmp despite being declared volatile. */
5503 if (!setjmp (send_process_frame
))
5505 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5507 process_sent_to
= proc
;
5510 EMACS_INT
this = len
;
5512 /* Send this batch, using one or more write calls. */
5515 EMACS_INT written
= 0;
5516 int outfd
= p
->outfd
;
5517 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5518 #ifdef DATAGRAM_SOCKETS
5519 if (DATAGRAM_CHAN_P (outfd
))
5521 rv
= sendto (outfd
, buf
, this,
5522 0, datagram_address
[outfd
].sa
,
5523 datagram_address
[outfd
].len
);
5526 else if (errno
== EMSGSIZE
)
5528 signal (SIGPIPE
, old_sigpipe
);
5529 report_file_error ("sending datagram",
5530 Fcons (proc
, Qnil
));
5538 written
= emacs_gnutls_write (p
, buf
, this);
5541 written
= emacs_write (outfd
, buf
, this);
5542 rv
= (written
? 0 : -1);
5543 #ifdef ADAPTIVE_READ_BUFFERING
5544 if (p
->read_output_delay
> 0
5545 && p
->adaptive_read_buffering
== 1)
5547 p
->read_output_delay
= 0;
5548 process_output_delay_count
--;
5549 p
->read_output_skip
= 0;
5553 signal (SIGPIPE
, old_sigpipe
);
5559 || errno
== EWOULDBLOCK
5565 /* Buffer is full. Wait, accepting input;
5566 that may allow the program
5567 to finish doing output and read more. */
5569 EMACS_INT offset
= 0;
5571 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5572 /* A gross hack to work around a bug in FreeBSD.
5573 In the following sequence, read(2) returns
5577 write(2) 954 bytes, get EAGAIN
5578 read(2) 1024 bytes in process_read_output
5579 read(2) 11 bytes in process_read_output
5581 That is, read(2) returns more bytes than have
5582 ever been written successfully. The 1033 bytes
5583 read are the 1022 bytes written successfully
5584 after processing (for example with CRs added if
5585 the terminal is set up that way which it is
5586 here). The same bytes will be seen again in a
5587 later read(2), without the CRs. */
5589 if (errno
== EAGAIN
)
5592 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5594 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5596 /* Running filters might relocate buffers or strings.
5597 Arrange to relocate BUF. */
5598 if (BUFFERP (object
))
5599 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5600 (unsigned char *) buf
);
5601 else if (STRINGP (object
))
5602 offset
= buf
- SSDATA (object
);
5604 #ifdef EMACS_HAS_USECS
5605 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5607 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5610 if (BUFFERP (object
))
5611 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5613 else if (STRINGP (object
))
5614 buf
= offset
+ SSDATA (object
);
5617 /* This is a real error. */
5618 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5628 signal (SIGPIPE
, old_sigpipe
);
5629 proc
= process_sent_to
;
5630 p
= XPROCESS (proc
);
5631 p
->raw_status_new
= 0;
5632 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5633 p
->tick
= ++process_tick
;
5634 deactivate_process (proc
);
5635 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5641 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5643 doc
: /* Send current contents of region as input to PROCESS.
5644 PROCESS may be a process, a buffer, the name of a process or buffer, or
5645 nil, indicating the current buffer's process.
5646 Called from program, takes three arguments, PROCESS, START and END.
5647 If the region is more than 500 characters long,
5648 it is sent in several bunches. This may happen even for shorter regions.
5649 Output from processes can arrive in between bunches. */)
5650 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5653 EMACS_INT start1
, end1
;
5655 proc
= get_process (process
);
5656 validate_region (&start
, &end
);
5658 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5659 move_gap (XINT (start
));
5661 start1
= CHAR_TO_BYTE (XINT (start
));
5662 end1
= CHAR_TO_BYTE (XINT (end
));
5663 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5664 Fcurrent_buffer ());
5669 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5671 doc
: /* Send PROCESS the contents of STRING as input.
5672 PROCESS may be a process, a buffer, the name of a process or buffer, or
5673 nil, indicating the current buffer's process.
5674 If STRING is more than 500 characters long,
5675 it is sent in several bunches. This may happen even for shorter strings.
5676 Output from processes can arrive in between bunches. */)
5677 (Lisp_Object process
, Lisp_Object string
)
5680 CHECK_STRING (string
);
5681 proc
= get_process (process
);
5682 send_process (proc
, SSDATA (string
),
5683 SBYTES (string
), string
);
5687 /* Return the foreground process group for the tty/pty that
5688 the process P uses. */
5690 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5695 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5698 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5699 master side. Try the slave side. */
5700 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5704 ioctl (fd
, TIOCGPGRP
, &gid
);
5708 #endif /* defined (TIOCGPGRP ) */
5713 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5714 Sprocess_running_child_p
, 0, 1, 0,
5715 doc
: /* Return t if PROCESS has given the terminal to a child.
5716 If the operating system does not make it possible to find out,
5717 return t unconditionally. */)
5718 (Lisp_Object process
)
5720 /* Initialize in case ioctl doesn't exist or gives an error,
5721 in a way that will cause returning t. */
5724 struct Lisp_Process
*p
;
5726 proc
= get_process (process
);
5727 p
= XPROCESS (proc
);
5729 if (!EQ (p
->type
, Qreal
))
5730 error ("Process %s is not a subprocess",
5733 error ("Process %s is not active",
5736 gid
= emacs_get_tty_pgrp (p
);
5743 /* send a signal number SIGNO to PROCESS.
5744 If CURRENT_GROUP is t, that means send to the process group
5745 that currently owns the terminal being used to communicate with PROCESS.
5746 This is used for various commands in shell mode.
5747 If CURRENT_GROUP is lambda, that means send to the process group
5748 that currently owns the terminal, but only if it is NOT the shell itself.
5750 If NOMSG is zero, insert signal-announcements into process's buffers
5753 If we can, we try to signal PROCESS by sending control characters
5754 down the pty. This allows us to signal inferiors who have changed
5755 their uid, for which killpg would return an EPERM error. */
5758 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5762 register struct Lisp_Process
*p
;
5766 proc
= get_process (process
);
5767 p
= XPROCESS (proc
);
5769 if (!EQ (p
->type
, Qreal
))
5770 error ("Process %s is not a subprocess",
5773 error ("Process %s is not active",
5777 current_group
= Qnil
;
5779 /* If we are using pgrps, get a pgrp number and make it negative. */
5780 if (NILP (current_group
))
5781 /* Send the signal to the shell's process group. */
5785 #ifdef SIGNALS_VIA_CHARACTERS
5786 /* If possible, send signals to the entire pgrp
5787 by sending an input character to it. */
5790 cc_t
*sig_char
= NULL
;
5792 tcgetattr (p
->infd
, &t
);
5797 sig_char
= &t
.c_cc
[VINTR
];
5801 sig_char
= &t
.c_cc
[VQUIT
];
5805 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5806 sig_char
= &t
.c_cc
[VSWTCH
];
5808 sig_char
= &t
.c_cc
[VSUSP
];
5813 if (sig_char
&& *sig_char
!= CDISABLE
)
5815 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5818 /* If we can't send the signal with a character,
5819 fall through and send it another way. */
5821 /* The code above may fall through if it can't
5822 handle the signal. */
5823 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5826 /* Get the current pgrp using the tty itself, if we have that.
5827 Otherwise, use the pty to get the pgrp.
5828 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5829 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5830 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5831 His patch indicates that if TIOCGPGRP returns an error, then
5832 we should just assume that p->pid is also the process group id. */
5834 gid
= emacs_get_tty_pgrp (p
);
5837 /* If we can't get the information, assume
5838 the shell owns the tty. */
5841 /* It is not clear whether anything really can set GID to -1.
5842 Perhaps on some system one of those ioctls can or could do so.
5843 Or perhaps this is vestigial. */
5846 #else /* ! defined (TIOCGPGRP ) */
5847 /* Can't select pgrps on this system, so we know that
5848 the child itself heads the pgrp. */
5850 #endif /* ! defined (TIOCGPGRP ) */
5852 /* If current_group is lambda, and the shell owns the terminal,
5853 don't send any signal. */
5854 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5862 p
->raw_status_new
= 0;
5864 p
->tick
= ++process_tick
;
5867 status_notify (NULL
);
5868 redisplay_preserve_echo_area (13);
5871 #endif /* ! defined (SIGCONT) */
5875 flush_pending_output (p
->infd
);
5879 /* If we don't have process groups, send the signal to the immediate
5880 subprocess. That isn't really right, but it's better than any
5881 obvious alternative. */
5884 kill (p
->pid
, signo
);
5888 /* gid may be a pid, or minus a pgrp's number */
5890 if (!NILP (current_group
))
5892 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5893 EMACS_KILLPG (gid
, signo
);
5900 #else /* ! defined (TIOCSIGSEND) */
5901 EMACS_KILLPG (gid
, signo
);
5902 #endif /* ! defined (TIOCSIGSEND) */
5905 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5906 doc
: /* Interrupt process PROCESS.
5907 PROCESS may be a process, a buffer, or the name of a process or buffer.
5908 No arg or nil means current buffer's process.
5909 Second arg CURRENT-GROUP non-nil means send signal to
5910 the current process-group of the process's controlling terminal
5911 rather than to the process's own process group.
5912 If the process is a shell, this means interrupt current subjob
5913 rather than the shell.
5915 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5916 don't send the signal. */)
5917 (Lisp_Object process
, Lisp_Object current_group
)
5919 process_send_signal (process
, SIGINT
, current_group
, 0);
5923 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5924 doc
: /* Kill process PROCESS. May be process or name of one.
5925 See function `interrupt-process' for more details on usage. */)
5926 (Lisp_Object process
, Lisp_Object current_group
)
5928 process_send_signal (process
, SIGKILL
, current_group
, 0);
5932 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5933 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5934 See function `interrupt-process' for more details on usage. */)
5935 (Lisp_Object process
, Lisp_Object current_group
)
5937 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5941 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5942 doc
: /* Stop process PROCESS. May be process or name of one.
5943 See function `interrupt-process' for more details on usage.
5944 If PROCESS is a network or serial process, inhibit handling of incoming
5946 (Lisp_Object process
, Lisp_Object current_group
)
5948 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5950 struct Lisp_Process
*p
;
5952 p
= XPROCESS (process
);
5953 if (NILP (p
->command
)
5956 FD_CLR (p
->infd
, &input_wait_mask
);
5957 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5963 error ("No SIGTSTP support");
5965 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5970 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5971 doc
: /* Continue process PROCESS. May be process or name of one.
5972 See function `interrupt-process' for more details on usage.
5973 If PROCESS is a network or serial process, resume handling of incoming
5975 (Lisp_Object process
, Lisp_Object current_group
)
5977 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5979 struct Lisp_Process
*p
;
5981 p
= XPROCESS (process
);
5982 if (EQ (p
->command
, Qt
)
5984 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5986 FD_SET (p
->infd
, &input_wait_mask
);
5987 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5989 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5990 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5991 #else /* not WINDOWSNT */
5992 tcflush (p
->infd
, TCIFLUSH
);
5993 #endif /* not WINDOWSNT */
5999 process_send_signal (process
, SIGCONT
, current_group
, 0);
6001 error ("No SIGCONT support");
6006 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6007 2, 2, "sProcess (name or number): \nnSignal code: ",
6008 doc
: /* Send PROCESS the signal with code SIGCODE.
6009 PROCESS may also be a number specifying the process id of the
6010 process to signal; in this case, the process need not be a child of
6012 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6013 (Lisp_Object process
, Lisp_Object sigcode
)
6017 if (INTEGERP (process
))
6019 pid
= XINT (process
);
6023 if (FLOATP (process
))
6025 pid
= (pid_t
) XFLOAT_DATA (process
);
6029 if (STRINGP (process
))
6032 if (tem
= Fget_process (process
), NILP (tem
))
6034 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6041 process
= get_process (process
);
6046 CHECK_PROCESS (process
);
6047 pid
= XPROCESS (process
)->pid
;
6049 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6053 #define parse_signal(NAME, VALUE) \
6054 else if (!xstrcasecmp (name, NAME)) \
6055 XSETINT (sigcode, VALUE)
6057 if (INTEGERP (sigcode
))
6063 CHECK_SYMBOL (sigcode
);
6064 name
= SSDATA (SYMBOL_NAME (sigcode
));
6066 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6072 parse_signal ("usr1", SIGUSR1
);
6075 parse_signal ("usr2", SIGUSR2
);
6078 parse_signal ("term", SIGTERM
);
6081 parse_signal ("hup", SIGHUP
);
6084 parse_signal ("int", SIGINT
);
6087 parse_signal ("quit", SIGQUIT
);
6090 parse_signal ("ill", SIGILL
);
6093 parse_signal ("abrt", SIGABRT
);
6096 parse_signal ("emt", SIGEMT
);
6099 parse_signal ("kill", SIGKILL
);
6102 parse_signal ("fpe", SIGFPE
);
6105 parse_signal ("bus", SIGBUS
);
6108 parse_signal ("segv", SIGSEGV
);
6111 parse_signal ("sys", SIGSYS
);
6114 parse_signal ("pipe", SIGPIPE
);
6117 parse_signal ("alrm", SIGALRM
);
6120 parse_signal ("urg", SIGURG
);
6123 parse_signal ("stop", SIGSTOP
);
6126 parse_signal ("tstp", SIGTSTP
);
6129 parse_signal ("cont", SIGCONT
);
6132 parse_signal ("chld", SIGCHLD
);
6135 parse_signal ("ttin", SIGTTIN
);
6138 parse_signal ("ttou", SIGTTOU
);
6141 parse_signal ("io", SIGIO
);
6144 parse_signal ("xcpu", SIGXCPU
);
6147 parse_signal ("xfsz", SIGXFSZ
);
6150 parse_signal ("vtalrm", SIGVTALRM
);
6153 parse_signal ("prof", SIGPROF
);
6156 parse_signal ("winch", SIGWINCH
);
6159 parse_signal ("info", SIGINFO
);
6162 error ("Undefined signal name %s", name
);
6167 return make_number (kill (pid
, XINT (sigcode
)));
6170 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6171 doc
: /* Make PROCESS see end-of-file in its input.
6172 EOF comes after any text already sent to it.
6173 PROCESS may be a process, a buffer, the name of a process or buffer, or
6174 nil, indicating the current buffer's process.
6175 If PROCESS is a network connection, or is a process communicating
6176 through a pipe (as opposed to a pty), then you cannot send any more
6177 text to PROCESS after you call this function.
6178 If PROCESS is a serial process, wait until all output written to the
6179 process has been transmitted to the serial port. */)
6180 (Lisp_Object process
)
6183 struct coding_system
*coding
;
6185 if (DATAGRAM_CONN_P (process
))
6188 proc
= get_process (process
);
6189 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6191 /* Make sure the process is really alive. */
6192 if (XPROCESS (proc
)->raw_status_new
)
6193 update_status (XPROCESS (proc
));
6194 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6195 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6197 if (CODING_REQUIRE_FLUSHING (coding
))
6199 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6200 send_process (proc
, "", 0, Qnil
);
6203 if (XPROCESS (proc
)->pty_flag
)
6204 send_process (proc
, "\004", 1, Qnil
);
6205 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6208 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6209 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6210 #endif /* not WINDOWSNT */
6211 /* Do nothing on Windows because writes are blocking. */
6215 int old_outfd
, new_outfd
;
6217 #ifdef HAVE_SHUTDOWN
6218 /* If this is a network connection, or socketpair is used
6219 for communication with the subprocess, call shutdown to cause EOF.
6220 (In some old system, shutdown to socketpair doesn't work.
6221 Then we just can't win.) */
6222 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6223 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6224 shutdown (XPROCESS (proc
)->outfd
, 1);
6225 /* In case of socketpair, outfd == infd, so don't close it. */
6226 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6227 emacs_close (XPROCESS (proc
)->outfd
);
6228 #else /* not HAVE_SHUTDOWN */
6229 emacs_close (XPROCESS (proc
)->outfd
);
6230 #endif /* not HAVE_SHUTDOWN */
6231 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6234 old_outfd
= XPROCESS (proc
)->outfd
;
6236 if (!proc_encode_coding_system
[new_outfd
])
6237 proc_encode_coding_system
[new_outfd
]
6238 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6239 memcpy (proc_encode_coding_system
[new_outfd
],
6240 proc_encode_coding_system
[old_outfd
],
6241 sizeof (struct coding_system
));
6242 memset (proc_encode_coding_system
[old_outfd
], 0,
6243 sizeof (struct coding_system
));
6245 XPROCESS (proc
)->outfd
= new_outfd
;
6250 /* On receipt of a signal that a child status has changed, loop asking
6251 about children with changed statuses until the system says there
6254 All we do is change the status; we do not run sentinels or print
6255 notifications. That is saved for the next time keyboard input is
6256 done, in order to avoid timing errors.
6258 ** WARNING: this can be called during garbage collection.
6259 Therefore, it must not be fooled by the presence of mark bits in
6262 ** USG WARNING: Although it is not obvious from the documentation
6263 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6264 signal() before executing at least one wait(), otherwise the
6265 handler will be called again, resulting in an infinite loop. The
6266 relevant portion of the documentation reads "SIGCLD signals will be
6267 queued and the signal-catching function will be continually
6268 reentered until the queue is empty". Invoking signal() causes the
6269 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6272 ** Malloc WARNING: This should never call malloc either directly or
6273 indirectly; if it does, that is a bug */
6277 sigchld_handler (int signo
)
6279 int old_errno
= errno
;
6281 struct Lisp_Process
*p
;
6283 SIGNAL_THREAD_CHECK (signo
);
6294 #endif /* no WUNTRACED */
6295 /* Keep trying to get a status until we get a definitive result. */
6299 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6301 while (pid
< 0 && errno
== EINTR
);
6305 /* PID == 0 means no processes found, PID == -1 means a real
6306 failure. We have done all our job, so return. */
6313 #endif /* no WNOHANG */
6315 /* Find the process that signaled us, and record its status. */
6317 /* The process can have been deleted by Fdelete_process. */
6318 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6320 Lisp_Object xpid
= XCAR (tail
);
6321 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6322 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6324 XSETCAR (tail
, Qnil
);
6325 goto sigchld_end_of_loop
;
6329 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6331 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6333 proc
= XCDR (XCAR (tail
));
6334 p
= XPROCESS (proc
);
6335 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6340 /* Look for an asynchronous process whose pid hasn't been filled
6343 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6345 proc
= XCDR (XCAR (tail
));
6346 p
= XPROCESS (proc
);
6352 /* Change the status of the process that was found. */
6355 int clear_desc_flag
= 0;
6357 p
->tick
= ++process_tick
;
6359 p
->raw_status_new
= 1;
6361 /* If process has terminated, stop waiting for its output. */
6362 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6364 clear_desc_flag
= 1;
6366 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6367 if (clear_desc_flag
)
6369 FD_CLR (p
->infd
, &input_wait_mask
);
6370 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6373 /* Tell wait_reading_process_output that it needs to wake up and
6375 if (input_available_clear_time
)
6376 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6379 /* There was no asynchronous process found for that pid: we have
6380 a synchronous process. */
6383 synch_process_alive
= 0;
6385 /* Report the status of the synchronous process. */
6387 synch_process_retcode
= WRETCODE (w
);
6388 else if (WIFSIGNALED (w
))
6389 synch_process_termsig
= WTERMSIG (w
);
6391 /* Tell wait_reading_process_output that it needs to wake up and
6393 if (input_available_clear_time
)
6394 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6397 sigchld_end_of_loop
:
6400 /* On some systems, we must return right away.
6401 If any more processes want to signal us, we will
6403 Otherwise (on systems that have WNOHANG), loop around
6404 to use up all the processes that have something to tell us. */
6405 #if (defined WINDOWSNT \
6406 || (defined USG && !defined GNU_LINUX \
6407 && !(defined HPUX && defined WNOHANG)))
6410 #endif /* USG, but not HPUX with WNOHANG */
6413 #endif /* SIGCHLD */
6417 exec_sentinel_unwind (Lisp_Object data
)
6419 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6424 exec_sentinel_error_handler (Lisp_Object error_val
)
6426 cmd_error_internal (error_val
, "error in process sentinel: ");
6428 update_echo_area ();
6429 Fsleep_for (make_number (2), Qnil
);
6434 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6436 Lisp_Object sentinel
, odeactivate
;
6437 register struct Lisp_Process
*p
= XPROCESS (proc
);
6438 int count
= SPECPDL_INDEX ();
6439 int outer_running_asynch_code
= running_asynch_code
;
6440 int waiting
= waiting_for_user_input_p
;
6442 if (inhibit_sentinels
)
6445 /* No need to gcpro these, because all we do with them later
6446 is test them for EQness, and none of them should be a string. */
6447 odeactivate
= Vdeactivate_mark
;
6449 Lisp_Object obuffer
, okeymap
;
6450 XSETBUFFER (obuffer
, current_buffer
);
6451 okeymap
= BVAR (current_buffer
, keymap
);
6454 /* There's no good reason to let sentinels change the current
6455 buffer, and many callers of accept-process-output, sit-for, and
6456 friends don't expect current-buffer to be changed from under them. */
6457 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6459 sentinel
= p
->sentinel
;
6460 if (NILP (sentinel
))
6463 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6464 assure that it gets restored no matter how the sentinel exits. */
6466 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6467 /* Inhibit quit so that random quits don't screw up a running filter. */
6468 specbind (Qinhibit_quit
, Qt
);
6469 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6471 /* In case we get recursively called,
6472 and we already saved the match data nonrecursively,
6473 save the same match data in safely recursive fashion. */
6474 if (outer_running_asynch_code
)
6477 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6478 restore_search_regs ();
6479 record_unwind_save_match_data ();
6480 Fset_match_data (tem
, Qt
);
6483 /* For speed, if a search happens within this code,
6484 save the match data in a special nonrecursive fashion. */
6485 running_asynch_code
= 1;
6487 internal_condition_case_1 (read_process_output_call
,
6489 Fcons (proc
, Fcons (reason
, Qnil
))),
6490 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6491 exec_sentinel_error_handler
);
6493 /* If we saved the match data nonrecursively, restore it now. */
6494 restore_search_regs ();
6495 running_asynch_code
= outer_running_asynch_code
;
6497 Vdeactivate_mark
= odeactivate
;
6499 /* Restore waiting_for_user_input_p as it was
6500 when we were called, in case the filter clobbered it. */
6501 waiting_for_user_input_p
= waiting
;
6504 if (! EQ (Fcurrent_buffer (), obuffer
)
6505 || ! EQ (current_buffer
->keymap
, okeymap
))
6507 /* But do it only if the caller is actually going to read events.
6508 Otherwise there's no need to make him wake up, and it could
6509 cause trouble (for example it would make sit_for return). */
6510 if (waiting_for_user_input_p
== -1)
6511 record_asynch_buffer_change ();
6513 unbind_to (count
, Qnil
);
6516 /* Report all recent events of a change in process status
6517 (either run the sentinel or output a message).
6518 This is usually done while Emacs is waiting for keyboard input
6519 but can be done at other times. */
6522 status_notify (struct Lisp_Process
*deleting_process
)
6524 register Lisp_Object proc
, buffer
;
6525 Lisp_Object tail
, msg
;
6526 struct gcpro gcpro1
, gcpro2
;
6530 /* We need to gcpro tail; if read_process_output calls a filter
6531 which deletes a process and removes the cons to which tail points
6532 from Vprocess_alist, and then causes a GC, tail is an unprotected
6536 /* Set this now, so that if new processes are created by sentinels
6537 that we run, we get called again to handle their status changes. */
6538 update_tick
= process_tick
;
6540 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6543 register struct Lisp_Process
*p
;
6545 proc
= Fcdr (XCAR (tail
));
6546 p
= XPROCESS (proc
);
6548 if (p
->tick
!= p
->update_tick
)
6550 p
->update_tick
= p
->tick
;
6552 /* If process is still active, read any output that remains. */
6553 while (! EQ (p
->filter
, Qt
)
6554 && ! EQ (p
->status
, Qconnect
)
6555 && ! EQ (p
->status
, Qlisten
)
6556 /* Network or serial process not stopped: */
6557 && ! EQ (p
->command
, Qt
)
6559 && p
!= deleting_process
6560 && read_process_output (proc
, p
->infd
) > 0);
6564 /* Get the text to use for the message. */
6565 if (p
->raw_status_new
)
6567 msg
= status_message (p
);
6569 /* If process is terminated, deactivate it or delete it. */
6571 if (CONSP (p
->status
))
6572 symbol
= XCAR (p
->status
);
6574 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6575 || EQ (symbol
, Qclosed
))
6577 if (delete_exited_processes
)
6578 remove_process (proc
);
6580 deactivate_process (proc
);
6583 /* The actions above may have further incremented p->tick.
6584 So set p->update_tick again
6585 so that an error in the sentinel will not cause
6586 this code to be run again. */
6587 p
->update_tick
= p
->tick
;
6588 /* Now output the message suitably. */
6589 if (!NILP (p
->sentinel
))
6590 exec_sentinel (proc
, msg
);
6591 /* Don't bother with a message in the buffer
6592 when a process becomes runnable. */
6593 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6596 struct buffer
*old
= current_buffer
;
6597 EMACS_INT opoint
, opoint_byte
;
6598 EMACS_INT before
, before_byte
;
6600 /* Avoid error if buffer is deleted
6601 (probably that's why the process is dead, too) */
6602 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6604 Fset_buffer (buffer
);
6607 opoint_byte
= PT_BYTE
;
6608 /* Insert new output into buffer
6609 at the current end-of-output marker,
6610 thus preserving logical ordering of input and output. */
6611 if (XMARKER (p
->mark
)->buffer
)
6612 Fgoto_char (p
->mark
);
6614 SET_PT_BOTH (ZV
, ZV_BYTE
);
6617 before_byte
= PT_BYTE
;
6619 tem
= BVAR (current_buffer
, read_only
);
6620 BVAR (current_buffer
, read_only
) = Qnil
;
6621 insert_string ("\nProcess ");
6622 Finsert (1, &p
->name
);
6623 insert_string (" ");
6625 BVAR (current_buffer
, read_only
) = tem
;
6626 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6628 if (opoint
>= before
)
6629 SET_PT_BOTH (opoint
+ (PT
- before
),
6630 opoint_byte
+ (PT_BYTE
- before_byte
));
6632 SET_PT_BOTH (opoint
, opoint_byte
);
6634 set_buffer_internal (old
);
6639 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6644 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6645 Sset_process_coding_system
, 1, 3, 0,
6646 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6647 DECODING will be used to decode subprocess output and ENCODING to
6648 encode subprocess input. */)
6649 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6651 register struct Lisp_Process
*p
;
6653 CHECK_PROCESS (process
);
6654 p
= XPROCESS (process
);
6656 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6658 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6659 Fcheck_coding_system (decoding
);
6660 Fcheck_coding_system (encoding
);
6661 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6662 p
->decode_coding_system
= decoding
;
6663 p
->encode_coding_system
= encoding
;
6664 setup_process_coding_systems (process
);
6669 DEFUN ("process-coding-system",
6670 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6671 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6672 (register Lisp_Object process
)
6674 CHECK_PROCESS (process
);
6675 return Fcons (XPROCESS (process
)->decode_coding_system
,
6676 XPROCESS (process
)->encode_coding_system
);
6679 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6680 Sset_process_filter_multibyte
, 2, 2, 0,
6681 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6682 If FLAG is non-nil, the filter is given multibyte strings.
6683 If FLAG is nil, the filter is given unibyte strings. In this case,
6684 all character code conversion except for end-of-line conversion is
6686 (Lisp_Object process
, Lisp_Object flag
)
6688 register struct Lisp_Process
*p
;
6690 CHECK_PROCESS (process
);
6691 p
= XPROCESS (process
);
6693 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6694 setup_process_coding_systems (process
);
6699 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6700 Sprocess_filter_multibyte_p
, 1, 1, 0,
6701 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6702 (Lisp_Object process
)
6704 register struct Lisp_Process
*p
;
6705 struct coding_system
*coding
;
6707 CHECK_PROCESS (process
);
6708 p
= XPROCESS (process
);
6709 coding
= proc_decode_coding_system
[p
->infd
];
6710 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6719 add_gpm_wait_descriptor (int desc
)
6721 add_keyboard_wait_descriptor (desc
);
6725 delete_gpm_wait_descriptor (int desc
)
6727 delete_keyboard_wait_descriptor (desc
);
6734 /* Return nonzero if *MASK has a bit set
6735 that corresponds to one of the keyboard input descriptors. */
6738 keyboard_bit_set (fd_set
*mask
)
6742 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6743 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6744 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6751 #else /* not subprocesses */
6753 /* Defined on msdos.c. */
6754 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6757 /* Implementation of wait_reading_process_output, assuming that there
6758 are no subprocesses. Used only by the MS-DOS build.
6760 Wait for timeout to elapse and/or keyboard input to be available.
6763 timeout in seconds, or
6764 zero for no limit, or
6765 -1 means gobble data immediately available but don't wait for any.
6767 read_kbd is a Lisp_Object:
6768 0 to ignore keyboard input, or
6769 1 to return when input is available, or
6770 -1 means caller will actually read the input, so don't throw to
6773 see full version for other parameters. We know that wait_proc will
6774 always be NULL, since `subprocesses' isn't defined.
6776 do_display != 0 means redisplay should be done to show subprocess
6777 output that arrives.
6779 Return true if we received input from any process. */
6782 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6784 Lisp_Object wait_for_cell
,
6785 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6788 EMACS_TIME end_time
, timeout
;
6789 SELECT_TYPE waitchannels
;
6792 /* What does time_limit really mean? */
6793 if (time_limit
|| microsecs
)
6795 EMACS_GET_TIME (end_time
);
6796 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6797 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6800 /* Turn off periodic alarms (in case they are in use)
6801 and then turn off any other atimers,
6802 because the select emulator uses alarms. */
6804 turn_on_atimers (0);
6808 int timeout_reduced_for_timers
= 0;
6810 /* If calling from keyboard input, do not quit
6811 since we want to return C-g as an input character.
6812 Otherwise, do pending quit if requested. */
6816 /* Exit now if the cell we're waiting for became non-nil. */
6817 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6820 /* Compute time from now till when time limit is up */
6821 /* Exit if already run out */
6822 if (time_limit
== -1)
6824 /* -1 specified for timeout means
6825 gobble output available now
6826 but don't wait at all. */
6828 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6830 else if (time_limit
|| microsecs
)
6832 EMACS_GET_TIME (timeout
);
6833 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6834 if (EMACS_TIME_NEG_P (timeout
))
6839 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6842 /* If our caller will not immediately handle keyboard events,
6843 run timer events directly.
6844 (Callers that will immediately read keyboard events
6845 call timer_delay on their own.) */
6846 if (NILP (wait_for_cell
))
6848 EMACS_TIME timer_delay
;
6852 int old_timers_run
= timers_run
;
6853 timer_delay
= timer_check ();
6854 if (timers_run
!= old_timers_run
&& do_display
)
6855 /* We must retry, since a timer may have requeued itself
6856 and that could alter the time delay. */
6857 redisplay_preserve_echo_area (14);
6861 while (!detect_input_pending ());
6863 /* If there is unread keyboard input, also return. */
6865 && requeued_events_pending_p ())
6868 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6870 EMACS_TIME difference
;
6871 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6872 if (EMACS_TIME_NEG_P (difference
))
6874 timeout
= timer_delay
;
6875 timeout_reduced_for_timers
= 1;
6880 /* Cause C-g and alarm signals to take immediate action,
6881 and cause input available signals to zero out timeout. */
6883 set_waiting_for_input (&timeout
);
6885 /* Wait till there is something to do. */
6887 if (! read_kbd
&& NILP (wait_for_cell
))
6888 FD_ZERO (&waitchannels
);
6890 FD_SET (0, &waitchannels
);
6892 /* If a frame has been newly mapped and needs updating,
6893 reprocess its display stuff. */
6894 if (frame_garbaged
&& do_display
)
6896 clear_waiting_for_input ();
6897 redisplay_preserve_echo_area (15);
6899 set_waiting_for_input (&timeout
);
6902 if (read_kbd
&& detect_input_pending ())
6905 FD_ZERO (&waitchannels
);
6908 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6913 /* Make C-g and alarm signals set flags again */
6914 clear_waiting_for_input ();
6916 /* If we woke up due to SIGWINCH, actually change size now. */
6917 do_pending_window_change (0);
6919 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6920 /* We waited the full specified time, so return now. */
6925 /* If the system call was interrupted, then go around the
6927 if (xerrno
== EINTR
)
6928 FD_ZERO (&waitchannels
);
6930 error ("select error: %s", emacs_strerror (xerrno
));
6933 /* Check for keyboard input */
6936 && detect_input_pending_run_timers (do_display
))
6938 swallow_events (do_display
);
6939 if (detect_input_pending_run_timers (do_display
))
6943 /* If there is unread keyboard input, also return. */
6945 && requeued_events_pending_p ())
6948 /* If wait_for_cell. check for keyboard input
6949 but don't run any timers.
6950 ??? (It seems wrong to me to check for keyboard
6951 input at all when wait_for_cell, but the code
6952 has been this way since July 1994.
6953 Try changing this after version 19.31.) */
6954 if (! NILP (wait_for_cell
)
6955 && detect_input_pending ())
6957 swallow_events (do_display
);
6958 if (detect_input_pending ())
6962 /* Exit now if the cell we're waiting for became non-nil. */
6963 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6972 #endif /* not subprocesses */
6974 /* The following functions are needed even if async subprocesses are
6975 not supported. Some of them are no-op stubs in that case. */
6977 /* Add DESC to the set of keyboard input descriptors. */
6980 add_keyboard_wait_descriptor (int desc
)
6982 #ifdef subprocesses /* actually means "not MSDOS" */
6983 FD_SET (desc
, &input_wait_mask
);
6984 FD_SET (desc
, &non_process_wait_mask
);
6985 if (desc
> max_input_desc
)
6986 max_input_desc
= desc
;
6990 /* From now on, do not expect DESC to give keyboard input. */
6993 delete_keyboard_wait_descriptor (int desc
)
6997 int lim
= max_input_desc
;
6999 FD_CLR (desc
, &input_wait_mask
);
7000 FD_CLR (desc
, &non_process_wait_mask
);
7002 if (desc
== max_input_desc
)
7003 for (fd
= 0; fd
< lim
; fd
++)
7004 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7005 max_input_desc
= fd
;
7009 /* Setup coding systems of PROCESS. */
7012 setup_process_coding_systems (Lisp_Object process
)
7015 struct Lisp_Process
*p
= XPROCESS (process
);
7017 int outch
= p
->outfd
;
7018 Lisp_Object coding_system
;
7020 if (inch
< 0 || outch
< 0)
7023 if (!proc_decode_coding_system
[inch
])
7024 proc_decode_coding_system
[inch
]
7025 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7026 coding_system
= p
->decode_coding_system
;
7027 if (! NILP (p
->filter
))
7029 else if (BUFFERP (p
->buffer
))
7031 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7032 coding_system
= raw_text_coding_system (coding_system
);
7034 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7036 if (!proc_encode_coding_system
[outch
])
7037 proc_encode_coding_system
[outch
]
7038 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7039 setup_coding_system (p
->encode_coding_system
,
7040 proc_encode_coding_system
[outch
]);
7044 /* Close all descriptors currently in use for communication
7045 with subprocess. This is used in a newly-forked subprocess
7046 to get rid of irrelevant descriptors. */
7049 close_process_descs (void)
7053 for (i
= 0; i
< MAXDESC
; i
++)
7055 Lisp_Object process
;
7056 process
= chan_process
[i
];
7057 if (!NILP (process
))
7059 int in
= XPROCESS (process
)->infd
;
7060 int out
= XPROCESS (process
)->outfd
;
7063 if (out
>= 0 && in
!= out
)
7070 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7071 doc
: /* Return the (or a) process associated with BUFFER.
7072 BUFFER may be a buffer or the name of one. */)
7073 (register Lisp_Object buffer
)
7076 register Lisp_Object buf
, tail
, proc
;
7078 if (NILP (buffer
)) return Qnil
;
7079 buf
= Fget_buffer (buffer
);
7080 if (NILP (buf
)) return Qnil
;
7082 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7084 proc
= Fcdr (XCAR (tail
));
7085 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7088 #endif /* subprocesses */
7092 DEFUN ("process-inherit-coding-system-flag",
7093 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7095 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7096 If this flag is t, `buffer-file-coding-system' of the buffer
7097 associated with PROCESS will inherit the coding system used to decode
7098 the process output. */)
7099 (register Lisp_Object process
)
7102 CHECK_PROCESS (process
);
7103 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7105 /* Ignore the argument and return the value of
7106 inherit-process-coding-system. */
7107 return inherit_process_coding_system
? Qt
: Qnil
;
7111 /* Kill all processes associated with `buffer'.
7112 If `buffer' is nil, kill all processes */
7115 kill_buffer_processes (Lisp_Object buffer
)
7118 Lisp_Object tail
, proc
;
7120 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7122 proc
= XCDR (XCAR (tail
));
7124 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7126 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7127 Fdelete_process (proc
);
7128 else if (XPROCESS (proc
)->infd
>= 0)
7129 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7132 #else /* subprocesses */
7133 /* Since we have no subprocesses, this does nothing. */
7134 #endif /* subprocesses */
7137 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7138 Swaiting_for_user_input_p
, 0, 0, 0,
7139 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7140 This is intended for use by asynchronous process output filters and sentinels. */)
7144 return (waiting_for_user_input_p
? Qt
: Qnil
);
7150 /* Stop reading input from keyboard sources. */
7153 hold_keyboard_input (void)
7158 /* Resume reading input from keyboard sources. */
7161 unhold_keyboard_input (void)
7166 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7169 kbd_on_hold_p (void)
7171 return kbd_is_on_hold
;
7175 /* Enumeration of and access to system processes a-la ps(1). */
7177 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7179 doc
: /* Return a list of numerical process IDs of all running processes.
7180 If this functionality is unsupported, return nil.
7182 See `process-attributes' for getting attributes of a process given its ID. */)
7185 return list_system_processes ();
7188 DEFUN ("process-attributes", Fprocess_attributes
,
7189 Sprocess_attributes
, 1, 1, 0,
7190 doc
: /* Return attributes of the process given by its PID, a number.
7192 Value is an alist where each element is a cons cell of the form
7196 If this functionality is unsupported, the value is nil.
7198 See `list-system-processes' for getting a list of all process IDs.
7200 The KEYs of the attributes that this function may return are listed
7201 below, together with the type of the associated VALUE (in parentheses).
7202 Not all platforms support all of these attributes; unsupported
7203 attributes will not appear in the returned alist.
7204 Unless explicitly indicated otherwise, numbers can have either
7205 integer or floating point values.
7207 euid -- Effective user User ID of the process (number)
7208 user -- User name corresponding to euid (string)
7209 egid -- Effective user Group ID of the process (number)
7210 group -- Group name corresponding to egid (string)
7211 comm -- Command name (executable name only) (string)
7212 state -- Process state code, such as "S", "R", or "T" (string)
7213 ppid -- Parent process ID (number)
7214 pgrp -- Process group ID (number)
7215 sess -- Session ID, i.e. process ID of session leader (number)
7216 ttname -- Controlling tty name (string)
7217 tpgid -- ID of foreground process group on the process's tty (number)
7218 minflt -- number of minor page faults (number)
7219 majflt -- number of major page faults (number)
7220 cminflt -- cumulative number of minor page faults (number)
7221 cmajflt -- cumulative number of major page faults (number)
7222 utime -- user time used by the process, in the (HIGH LOW USEC) format
7223 stime -- system time used by the process, in the (HIGH LOW USEC) format
7224 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7225 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7226 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7227 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7228 pri -- priority of the process (number)
7229 nice -- nice value of the process (number)
7230 thcount -- process thread count (number)
7231 start -- time the process started, in the (HIGH LOW USEC) format
7232 vsize -- virtual memory size of the process in KB's (number)
7233 rss -- resident set size of the process in KB's (number)
7234 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7235 pcpu -- percents of CPU time used by the process (floating-point number)
7236 pmem -- percents of total physical memory used by process's resident set
7237 (floating-point number)
7238 args -- command line which invoked the process (string). */)
7241 return system_process_attributes (pid
);
7251 inhibit_sentinels
= 0;
7255 if (! noninteractive
|| initialized
)
7257 signal (SIGCHLD
, sigchld_handler
);
7260 FD_ZERO (&input_wait_mask
);
7261 FD_ZERO (&non_keyboard_wait_mask
);
7262 FD_ZERO (&non_process_wait_mask
);
7263 FD_ZERO (&write_mask
);
7264 max_process_desc
= 0;
7265 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7267 #ifdef NON_BLOCKING_CONNECT
7268 FD_ZERO (&connect_wait_mask
);
7269 num_pending_connects
= 0;
7272 #ifdef ADAPTIVE_READ_BUFFERING
7273 process_output_delay_count
= 0;
7274 process_output_skip
= 0;
7277 /* Don't do this, it caused infinite select loops. The display
7278 method should call add_keyboard_wait_descriptor on stdin if it
7281 FD_SET (0, &input_wait_mask
);
7284 Vprocess_alist
= Qnil
;
7286 deleted_pid_list
= Qnil
;
7288 for (i
= 0; i
< MAXDESC
; i
++)
7290 chan_process
[i
] = Qnil
;
7291 proc_buffered_char
[i
] = -1;
7293 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7294 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7295 #ifdef DATAGRAM_SOCKETS
7296 memset (datagram_address
, 0, sizeof datagram_address
);
7300 Lisp_Object subfeatures
= Qnil
;
7301 const struct socket_options
*sopt
;
7303 #define ADD_SUBFEATURE(key, val) \
7304 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7306 #ifdef NON_BLOCKING_CONNECT
7307 ADD_SUBFEATURE (QCnowait
, Qt
);
7309 #ifdef DATAGRAM_SOCKETS
7310 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7312 #ifdef HAVE_SEQPACKET
7313 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7315 #ifdef HAVE_LOCAL_SOCKETS
7316 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7318 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7320 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7322 #ifdef HAVE_GETSOCKNAME
7323 ADD_SUBFEATURE (QCservice
, Qt
);
7325 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7326 ADD_SUBFEATURE (QCserver
, Qt
);
7329 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7330 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7332 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7335 #if defined (DARWIN_OS)
7336 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7337 processes. As such, we only change the default value. */
7340 char const *release
= (STRINGP (Voperating_system_release
)
7341 ? SSDATA (Voperating_system_release
)
7343 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7344 && release
[1] == '.')) {
7345 Vprocess_connection_type
= Qnil
;
7349 #endif /* subprocesses */
7354 syms_of_process (void)
7358 DEFSYM (Qprocessp
, "processp");
7359 DEFSYM (Qrun
, "run");
7360 DEFSYM (Qstop
, "stop");
7361 DEFSYM (Qsignal
, "signal");
7363 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7366 Qexit = intern_c_string ("exit");
7367 staticpro (&Qexit); */
7369 DEFSYM (Qopen
, "open");
7370 DEFSYM (Qclosed
, "closed");
7371 DEFSYM (Qconnect
, "connect");
7372 DEFSYM (Qfailed
, "failed");
7373 DEFSYM (Qlisten
, "listen");
7374 DEFSYM (Qlocal
, "local");
7375 DEFSYM (Qipv4
, "ipv4");
7377 DEFSYM (Qipv6
, "ipv6");
7379 DEFSYM (Qdatagram
, "datagram");
7380 DEFSYM (Qseqpacket
, "seqpacket");
7382 DEFSYM (QCport
, ":port");
7383 DEFSYM (QCspeed
, ":speed");
7384 DEFSYM (QCprocess
, ":process");
7386 DEFSYM (QCbytesize
, ":bytesize");
7387 DEFSYM (QCstopbits
, ":stopbits");
7388 DEFSYM (QCparity
, ":parity");
7389 DEFSYM (Qodd
, "odd");
7390 DEFSYM (Qeven
, "even");
7391 DEFSYM (QCflowcontrol
, ":flowcontrol");
7394 DEFSYM (QCsummary
, ":summary");
7396 DEFSYM (Qreal
, "real");
7397 DEFSYM (Qnetwork
, "network");
7398 DEFSYM (Qserial
, "serial");
7399 DEFSYM (QCbuffer
, ":buffer");
7400 DEFSYM (QChost
, ":host");
7401 DEFSYM (QCservice
, ":service");
7402 DEFSYM (QClocal
, ":local");
7403 DEFSYM (QCremote
, ":remote");
7404 DEFSYM (QCcoding
, ":coding");
7405 DEFSYM (QCserver
, ":server");
7406 DEFSYM (QCnowait
, ":nowait");
7407 DEFSYM (QCsentinel
, ":sentinel");
7408 DEFSYM (QClog
, ":log");
7409 DEFSYM (QCnoquery
, ":noquery");
7410 DEFSYM (QCstop
, ":stop");
7411 DEFSYM (QCoptions
, ":options");
7412 DEFSYM (QCplist
, ":plist");
7414 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7416 staticpro (&Vprocess_alist
);
7418 staticpro (&deleted_pid_list
);
7421 #endif /* subprocesses */
7423 DEFSYM (QCname
, ":name");
7424 DEFSYM (QCtype
, ":type");
7426 DEFSYM (Qeuid
, "euid");
7427 DEFSYM (Qegid
, "egid");
7428 DEFSYM (Quser
, "user");
7429 DEFSYM (Qgroup
, "group");
7430 DEFSYM (Qcomm
, "comm");
7431 DEFSYM (Qstate
, "state");
7432 DEFSYM (Qppid
, "ppid");
7433 DEFSYM (Qpgrp
, "pgrp");
7434 DEFSYM (Qsess
, "sess");
7435 DEFSYM (Qttname
, "ttname");
7436 DEFSYM (Qtpgid
, "tpgid");
7437 DEFSYM (Qminflt
, "minflt");
7438 DEFSYM (Qmajflt
, "majflt");
7439 DEFSYM (Qcminflt
, "cminflt");
7440 DEFSYM (Qcmajflt
, "cmajflt");
7441 DEFSYM (Qutime
, "utime");
7442 DEFSYM (Qstime
, "stime");
7443 DEFSYM (Qtime
, "time");
7444 DEFSYM (Qcutime
, "cutime");
7445 DEFSYM (Qcstime
, "cstime");
7446 DEFSYM (Qctime
, "ctime");
7447 DEFSYM (Qpri
, "pri");
7448 DEFSYM (Qnice
, "nice");
7449 DEFSYM (Qthcount
, "thcount");
7450 DEFSYM (Qstart
, "start");
7451 DEFSYM (Qvsize
, "vsize");
7452 DEFSYM (Qrss
, "rss");
7453 DEFSYM (Qetime
, "etime");
7454 DEFSYM (Qpcpu
, "pcpu");
7455 DEFSYM (Qpmem
, "pmem");
7456 DEFSYM (Qargs
, "args");
7458 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7459 doc
: /* Non-nil means delete processes immediately when they exit.
7460 A value of nil means don't delete them until `list-processes' is run. */);
7462 delete_exited_processes
= 1;
7465 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7466 doc
: /* Control type of device used to communicate with subprocesses.
7467 Values are nil to use a pipe, or t or `pty' to use a pty.
7468 The value has no effect if the system has no ptys or if all ptys are busy:
7469 then a pipe is used in any case.
7470 The value takes effect when `start-process' is called. */);
7471 Vprocess_connection_type
= Qt
;
7473 #ifdef ADAPTIVE_READ_BUFFERING
7474 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7475 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7476 On some systems, when Emacs reads the output from a subprocess, the output data
7477 is read in very small blocks, potentially resulting in very poor performance.
7478 This behavior can be remedied to some extent by setting this variable to a
7479 non-nil value, as it will automatically delay reading from such processes, to
7480 allow them to produce more output before Emacs tries to read it.
7481 If the value is t, the delay is reset after each write to the process; any other
7482 non-nil value means that the delay is not reset on write.
7483 The variable takes effect when `start-process' is called. */);
7484 Vprocess_adaptive_read_buffering
= Qt
;
7487 defsubr (&Sprocessp
);
7488 defsubr (&Sget_process
);
7489 defsubr (&Sdelete_process
);
7490 defsubr (&Sprocess_status
);
7491 defsubr (&Sprocess_exit_status
);
7492 defsubr (&Sprocess_id
);
7493 defsubr (&Sprocess_name
);
7494 defsubr (&Sprocess_tty_name
);
7495 defsubr (&Sprocess_command
);
7496 defsubr (&Sset_process_buffer
);
7497 defsubr (&Sprocess_buffer
);
7498 defsubr (&Sprocess_mark
);
7499 defsubr (&Sset_process_filter
);
7500 defsubr (&Sprocess_filter
);
7501 defsubr (&Sset_process_sentinel
);
7502 defsubr (&Sprocess_sentinel
);
7503 defsubr (&Sset_process_window_size
);
7504 defsubr (&Sset_process_inherit_coding_system_flag
);
7505 defsubr (&Sset_process_query_on_exit_flag
);
7506 defsubr (&Sprocess_query_on_exit_flag
);
7507 defsubr (&Sprocess_contact
);
7508 defsubr (&Sprocess_plist
);
7509 defsubr (&Sset_process_plist
);
7510 defsubr (&Sprocess_list
);
7511 defsubr (&Sstart_process
);
7512 defsubr (&Sserial_process_configure
);
7513 defsubr (&Smake_serial_process
);
7514 defsubr (&Sset_network_process_option
);
7515 defsubr (&Smake_network_process
);
7516 defsubr (&Sformat_network_address
);
7517 #if defined (HAVE_NET_IF_H)
7519 defsubr (&Snetwork_interface_list
);
7521 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7522 defsubr (&Snetwork_interface_info
);
7524 #endif /* defined (HAVE_NET_IF_H) */
7525 #ifdef DATAGRAM_SOCKETS
7526 defsubr (&Sprocess_datagram_address
);
7527 defsubr (&Sset_process_datagram_address
);
7529 defsubr (&Saccept_process_output
);
7530 defsubr (&Sprocess_send_region
);
7531 defsubr (&Sprocess_send_string
);
7532 defsubr (&Sinterrupt_process
);
7533 defsubr (&Skill_process
);
7534 defsubr (&Squit_process
);
7535 defsubr (&Sstop_process
);
7536 defsubr (&Scontinue_process
);
7537 defsubr (&Sprocess_running_child_p
);
7538 defsubr (&Sprocess_send_eof
);
7539 defsubr (&Ssignal_process
);
7540 defsubr (&Swaiting_for_user_input_p
);
7541 defsubr (&Sprocess_type
);
7542 defsubr (&Sset_process_coding_system
);
7543 defsubr (&Sprocess_coding_system
);
7544 defsubr (&Sset_process_filter_multibyte
);
7545 defsubr (&Sprocess_filter_multibyte_p
);
7547 #endif /* subprocesses */
7549 defsubr (&Sget_buffer_process
);
7550 defsubr (&Sprocess_inherit_coding_system_flag
);
7551 defsubr (&Slist_system_processes
);
7552 defsubr (&Sprocess_attributes
);