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 /* Work around GCC 4.7.0 bug with strict overflow checking; see
124 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
125 These lines can be removed once the GCC bug is fixed. */
126 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
127 # pragma GCC diagnostic ignored "-Wstrict-overflow"
130 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
131 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
132 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
133 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
134 Lisp_Object QCname
, QCtype
;
136 /* Non-zero if keyboard input is on hold, zero otherwise. */
138 static int kbd_is_on_hold
;
140 /* Nonzero means don't run process sentinels. This is used
142 int inhibit_sentinels
;
146 Lisp_Object Qprocessp
;
147 static Lisp_Object Qrun
, Qstop
, Qsignal
;
148 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
150 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
151 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
153 static Lisp_Object Qipv6
;
155 static Lisp_Object QCport
, QCprocess
;
157 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
158 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
159 static Lisp_Object QCbuffer
, QChost
, QCservice
;
160 static Lisp_Object QClocal
, QCremote
, QCcoding
;
161 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
162 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
163 static Lisp_Object Qlast_nonmenu_event
;
164 /* QCfamily is declared and initialized in xfaces.c,
165 QCfilter in keyboard.c. */
166 extern Lisp_Object QCfamily
, QCfilter
;
168 /* Qexit is declared and initialized in eval.c. */
170 /* QCfamily is defined in xfaces.c. */
171 extern Lisp_Object QCfamily
;
172 /* QCfilter is defined in keyboard.c. */
173 extern Lisp_Object QCfilter
;
175 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
176 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
177 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
178 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
184 /* Number of events of change of status of a process. */
185 static int process_tick
;
186 /* Number of events for which the user or sentinel has been notified. */
187 static int update_tick
;
189 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
191 /* Only W32 has this, it really means that select can't take write mask. */
192 #ifdef BROKEN_NON_BLOCKING_CONNECT
193 #undef NON_BLOCKING_CONNECT
194 #define SELECT_CANT_DO_WRITE_MASK
196 #ifndef NON_BLOCKING_CONNECT
198 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
199 #if defined (O_NONBLOCK) || defined (O_NDELAY)
200 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
201 #define NON_BLOCKING_CONNECT
202 #endif /* EWOULDBLOCK || EINPROGRESS */
203 #endif /* O_NONBLOCK || O_NDELAY */
204 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
205 #endif /* HAVE_SELECT */
206 #endif /* NON_BLOCKING_CONNECT */
207 #endif /* BROKEN_NON_BLOCKING_CONNECT */
209 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
210 this system. We need to read full packets, so we need a
211 "non-destructive" select. So we require either native select,
212 or emulation of select using FIONREAD. */
214 #ifdef BROKEN_DATAGRAM_SOCKETS
215 #undef DATAGRAM_SOCKETS
217 #ifndef DATAGRAM_SOCKETS
218 #if defined (HAVE_SELECT) || defined (FIONREAD)
219 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
220 #define DATAGRAM_SOCKETS
221 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
222 #endif /* HAVE_SELECT || FIONREAD */
223 #endif /* DATAGRAM_SOCKETS */
224 #endif /* BROKEN_DATAGRAM_SOCKETS */
226 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
227 # define HAVE_SEQPACKET
230 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
231 #ifdef EMACS_HAS_USECS
232 #define ADAPTIVE_READ_BUFFERING
236 #ifdef ADAPTIVE_READ_BUFFERING
237 #define READ_OUTPUT_DELAY_INCREMENT 10000
238 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
239 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
241 /* Number of processes which have a non-zero read_output_delay,
242 and therefore might be delayed for adaptive read buffering. */
244 static int process_output_delay_count
;
246 /* Non-zero if any process has non-nil read_output_skip. */
248 static int process_output_skip
;
251 #define process_output_delay_count 0
254 static Lisp_Object
Fget_process (Lisp_Object
);
255 static void create_process (Lisp_Object
, char **, Lisp_Object
);
257 static int keyboard_bit_set (SELECT_TYPE
*);
259 static void deactivate_process (Lisp_Object
);
260 static void status_notify (struct Lisp_Process
*);
261 static int read_process_output (Lisp_Object
, int);
262 static void create_pty (Lisp_Object
);
264 /* If we support a window system, turn on the code to poll periodically
265 to detect C-g. It isn't actually used when doing interrupt input. */
266 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
267 #define POLL_FOR_INPUT
270 static Lisp_Object
get_process (register Lisp_Object name
);
271 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
273 /* Mask of bits indicating the descriptors that we wait for input on. */
275 static SELECT_TYPE input_wait_mask
;
277 /* Mask that excludes keyboard input descriptor(s). */
279 static SELECT_TYPE non_keyboard_wait_mask
;
281 /* Mask that excludes process input descriptor(s). */
283 static SELECT_TYPE non_process_wait_mask
;
285 /* Mask for selecting for write. */
287 static SELECT_TYPE write_mask
;
289 #ifdef NON_BLOCKING_CONNECT
290 /* Mask of bits indicating the descriptors that we wait for connect to
291 complete on. Once they complete, they are removed from this mask
292 and added to the input_wait_mask and non_keyboard_wait_mask. */
294 static SELECT_TYPE connect_wait_mask
;
296 /* Number of bits set in connect_wait_mask. */
297 static int num_pending_connects
;
298 #endif /* NON_BLOCKING_CONNECT */
300 /* The largest descriptor currently in use for a process object. */
301 static int max_process_desc
;
303 /* The largest descriptor currently in use for input. */
304 static int max_input_desc
;
306 /* Indexed by descriptor, gives the process (if any) for that descriptor */
307 static Lisp_Object chan_process
[MAXDESC
];
309 /* Alist of elements (NAME . PROCESS) */
310 static Lisp_Object Vprocess_alist
;
312 /* Buffered-ahead input char from process, indexed by channel.
313 -1 means empty (no char is buffered).
314 Used on sys V where the only way to tell if there is any
315 output from the process is to read at least one char.
316 Always -1 on systems that support FIONREAD. */
318 static int proc_buffered_char
[MAXDESC
];
320 /* Table of `struct coding-system' for each process. */
321 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
322 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
324 #ifdef DATAGRAM_SOCKETS
325 /* Table of `partner address' for datagram sockets. */
326 static struct sockaddr_and_len
{
329 } datagram_address
[MAXDESC
];
330 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
331 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
333 #define DATAGRAM_CHAN_P(chan) (0)
334 #define DATAGRAM_CONN_P(proc) (0)
337 /* Maximum number of bytes to send to a pty without an eof. */
338 static int pty_max_bytes
;
342 static struct fd_callback_data
348 int condition
; /* mask of the defines above. */
349 } fd_callback_info
[MAXDESC
];
352 /* Add a file descriptor FD to be monitored for when read is possible.
353 When read is possible, call FUNC with argument DATA. */
356 add_read_fd (int fd
, fd_callback func
, void *data
)
358 xassert (fd
< MAXDESC
);
359 add_keyboard_wait_descriptor (fd
);
361 fd_callback_info
[fd
].func
= func
;
362 fd_callback_info
[fd
].data
= data
;
363 fd_callback_info
[fd
].condition
|= FOR_READ
;
366 /* Stop monitoring file descriptor FD for when read is possible. */
369 delete_read_fd (int fd
)
371 xassert (fd
< MAXDESC
);
372 delete_keyboard_wait_descriptor (fd
);
374 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
375 if (fd_callback_info
[fd
].condition
== 0)
377 fd_callback_info
[fd
].func
= 0;
378 fd_callback_info
[fd
].data
= 0;
382 /* Add a file descriptor FD to be monitored for when write is possible.
383 When write is possible, call FUNC with argument DATA. */
386 add_write_fd (int fd
, fd_callback func
, void *data
)
388 xassert (fd
< MAXDESC
);
389 FD_SET (fd
, &write_mask
);
390 if (fd
> max_input_desc
)
393 fd_callback_info
[fd
].func
= func
;
394 fd_callback_info
[fd
].data
= data
;
395 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
398 /* Stop monitoring file descriptor FD for when write is possible. */
401 delete_write_fd (int fd
)
403 int lim
= max_input_desc
;
405 xassert (fd
< MAXDESC
);
406 FD_CLR (fd
, &write_mask
);
407 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
408 if (fd_callback_info
[fd
].condition
== 0)
410 fd_callback_info
[fd
].func
= 0;
411 fd_callback_info
[fd
].data
= 0;
413 if (fd
== max_input_desc
)
414 for (fd
= lim
; fd
>= 0; fd
--)
415 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
425 /* Compute the Lisp form of the process status, p->status, from
426 the numeric status that was returned by `wait'. */
428 static Lisp_Object
status_convert (int);
431 update_status (struct Lisp_Process
*p
)
433 eassert (p
->raw_status_new
);
434 p
->status
= status_convert (p
->raw_status
);
435 p
->raw_status_new
= 0;
438 /* Convert a process status word in Unix format to
439 the list that we use internally. */
442 status_convert (int w
)
445 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
446 else if (WIFEXITED (w
))
447 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
448 WCOREDUMP (w
) ? Qt
: Qnil
));
449 else if (WIFSIGNALED (w
))
450 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
451 WCOREDUMP (w
) ? Qt
: Qnil
));
456 /* Given a status-list, extract the three pieces of information
457 and store them individually through the three pointers. */
460 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
474 *code
= XFASTINT (XCAR (tem
));
476 *coredump
= !NILP (tem
);
480 /* Return a string describing a process status list. */
483 status_message (struct Lisp_Process
*p
)
485 Lisp_Object status
= p
->status
;
488 Lisp_Object string
, string2
;
490 decode_status (status
, &symbol
, &code
, &coredump
);
492 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
495 synchronize_system_messages_locale ();
496 signame
= strsignal (code
);
498 string
= build_string ("unknown");
503 string
= make_unibyte_string (signame
, strlen (signame
));
504 if (! NILP (Vlocale_coding_system
))
505 string
= (code_convert_string_norecord
506 (string
, Vlocale_coding_system
, 0));
507 c1
= STRING_CHAR (SDATA (string
));
510 Faset (string
, make_number (0), make_number (c2
));
512 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
513 return concat2 (string
, string2
);
515 else if (EQ (symbol
, Qexit
))
518 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
520 return build_string ("finished\n");
521 string
= Fnumber_to_string (make_number (code
));
522 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
523 return concat3 (build_string ("exited abnormally with code "),
526 else if (EQ (symbol
, Qfailed
))
528 string
= Fnumber_to_string (make_number (code
));
529 string2
= build_string ("\n");
530 return concat3 (build_string ("failed with code "),
534 return Fcopy_sequence (Fsymbol_name (symbol
));
539 /* The file name of the pty opened by allocate_pty. */
540 static char pty_name
[24];
542 /* Open an available pty, returning a file descriptor.
543 Return -1 on failure.
544 The file name of the terminal corresponding to the pty
545 is left in the variable pty_name. */
556 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
557 for (i
= 0; i
< 16; i
++)
560 #ifdef PTY_NAME_SPRINTF
563 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
564 #endif /* no PTY_NAME_SPRINTF */
568 #else /* no PTY_OPEN */
570 { /* Some systems name their pseudoterminals so that there are gaps in
571 the usual sequence - for example, on HP9000/S700 systems, there
572 are no pseudoterminals with names ending in 'f'. So we wait for
573 three failures in a row before deciding that we've reached the
575 int failed_count
= 0;
578 if (stat (pty_name
, &stb
) < 0)
581 if (failed_count
>= 3)
588 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
590 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
593 #endif /* no PTY_OPEN */
597 /* check to make certain that both sides are available
598 this avoids a nasty yet stupid bug in rlogins */
599 #ifdef PTY_TTY_NAME_SPRINTF
602 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
603 #endif /* no PTY_TTY_NAME_SPRINTF */
604 if (access (pty_name
, 6) != 0)
619 #endif /* HAVE_PTYS */
622 make_process (Lisp_Object name
)
624 register Lisp_Object val
, tem
, name1
;
625 register struct Lisp_Process
*p
;
626 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
629 p
= allocate_process ();
637 p
->raw_status_new
= 0;
639 p
->mark
= Fmake_marker ();
640 p
->kill_without_query
= 0;
642 #ifdef ADAPTIVE_READ_BUFFERING
643 p
->adaptive_read_buffering
= 0;
644 p
->read_output_delay
= 0;
645 p
->read_output_skip
= 0;
649 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
650 /* Default log level. */
651 p
->gnutls_log_level
= 0;
652 /* GnuTLS handshakes attempted for this connection. */
653 p
->gnutls_handshakes_tried
= 0;
655 p
->gnutls_state
= NULL
;
656 p
->gnutls_x509_cred
= NULL
;
657 p
->gnutls_anon_cred
= NULL
;
660 /* If name is already in use, modify it until it is unused. */
665 tem
= Fget_process (name1
);
666 if (NILP (tem
)) break;
667 sprintf (suffix
, "<%"pMd
">", i
);
668 name1
= concat2 (name
, build_string (suffix
));
672 XSETPROCESS (val
, p
);
673 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
678 remove_process (register Lisp_Object proc
)
680 register Lisp_Object pair
;
682 pair
= Frassq (proc
, Vprocess_alist
);
683 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
685 deactivate_process (proc
);
689 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
690 doc
: /* Return t if OBJECT is a process. */)
693 return PROCESSP (object
) ? Qt
: Qnil
;
696 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
697 doc
: /* Return the process named NAME, or nil if there is none. */)
698 (register Lisp_Object name
)
703 return Fcdr (Fassoc (name
, Vprocess_alist
));
706 /* This is how commands for the user decode process arguments. It
707 accepts a process, a process name, a buffer, a buffer name, or nil.
708 Buffers denote the first process in the buffer, and nil denotes the
712 get_process (register Lisp_Object name
)
714 register Lisp_Object proc
, obj
;
717 obj
= Fget_process (name
);
719 obj
= Fget_buffer (name
);
721 error ("Process %s does not exist", SDATA (name
));
723 else if (NILP (name
))
724 obj
= Fcurrent_buffer ();
728 /* Now obj should be either a buffer object or a process object.
732 proc
= Fget_buffer_process (obj
);
734 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
746 /* Fdelete_process promises to immediately forget about the process, but in
747 reality, Emacs needs to remember those processes until they have been
748 treated by sigchld_handler; otherwise this handler would consider the
749 process as being synchronous and say that the synchronous process is
751 static Lisp_Object deleted_pid_list
;
754 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
755 doc
: /* Delete PROCESS: kill it and forget about it immediately.
756 PROCESS may be a process, a buffer, the name of a process or buffer, or
757 nil, indicating the current buffer's process. */)
758 (register Lisp_Object process
)
760 register struct Lisp_Process
*p
;
762 process
= get_process (process
);
763 p
= XPROCESS (process
);
765 p
->raw_status_new
= 0;
766 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
768 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
769 p
->tick
= ++process_tick
;
771 redisplay_preserve_echo_area (13);
773 else if (p
->infd
>= 0)
777 /* Assignment to EMACS_INT stops GCC whining about limited range
779 EMACS_INT pid
= p
->pid
;
781 /* No problem storing the pid here, as it is still in Vprocess_alist. */
782 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
783 /* GC treated elements set to nil. */
784 Fdelq (Qnil
, deleted_pid_list
));
785 /* If the process has already signaled, remove it from the list. */
786 if (p
->raw_status_new
)
789 if (CONSP (p
->status
))
790 symbol
= XCAR (p
->status
);
791 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
793 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
797 Fkill_process (process
, Qnil
);
798 /* Do this now, since remove_process will make sigchld_handler do nothing. */
800 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
801 p
->tick
= ++process_tick
;
803 redisplay_preserve_echo_area (13);
806 remove_process (process
);
810 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
811 doc
: /* Return the status of PROCESS.
812 The returned value is one of the following symbols:
813 run -- for a process that is running.
814 stop -- for a process stopped but continuable.
815 exit -- for a process that has exited.
816 signal -- for a process that has got a fatal signal.
817 open -- for a network stream connection that is open.
818 listen -- for a network stream server that is listening.
819 closed -- for a network stream connection that is closed.
820 connect -- when waiting for a non-blocking connection to complete.
821 failed -- when a non-blocking connection has failed.
822 nil -- if arg is a process name and no such process exists.
823 PROCESS may be a process, a buffer, the name of a process, or
824 nil, indicating the current buffer's process. */)
825 (register Lisp_Object process
)
827 register struct Lisp_Process
*p
;
828 register Lisp_Object status
;
830 if (STRINGP (process
))
831 process
= Fget_process (process
);
833 process
= get_process (process
);
838 p
= XPROCESS (process
);
839 if (p
->raw_status_new
)
843 status
= XCAR (status
);
844 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
846 if (EQ (status
, Qexit
))
848 else if (EQ (p
->command
, Qt
))
850 else if (EQ (status
, Qrun
))
856 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
858 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
859 If PROCESS has not yet exited or died, return 0. */)
860 (register Lisp_Object process
)
862 CHECK_PROCESS (process
);
863 if (XPROCESS (process
)->raw_status_new
)
864 update_status (XPROCESS (process
));
865 if (CONSP (XPROCESS (process
)->status
))
866 return XCAR (XCDR (XPROCESS (process
)->status
));
867 return make_number (0);
870 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
871 doc
: /* Return the process id of PROCESS.
872 This is the pid of the external process which PROCESS uses or talks to.
873 For a network connection, this value is nil. */)
874 (register Lisp_Object process
)
876 /* Assignment to EMACS_INT stops GCC whining about limited range of
880 CHECK_PROCESS (process
);
881 pid
= XPROCESS (process
)->pid
;
882 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
885 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
886 doc
: /* Return the name of PROCESS, as a string.
887 This is the name of the program invoked in PROCESS,
888 possibly modified to make it unique among process names. */)
889 (register Lisp_Object process
)
891 CHECK_PROCESS (process
);
892 return XPROCESS (process
)->name
;
895 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
896 doc
: /* Return the command that was executed to start PROCESS.
897 This is a list of strings, the first string being the program executed
898 and the rest of the strings being the arguments given to it.
899 For a network or serial process, this is nil (process is running) or t
900 \(process is stopped). */)
901 (register Lisp_Object process
)
903 CHECK_PROCESS (process
);
904 return XPROCESS (process
)->command
;
907 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
908 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
909 This is the terminal that the process itself reads and writes on,
910 not the name of the pty that Emacs uses to talk with that terminal. */)
911 (register Lisp_Object process
)
913 CHECK_PROCESS (process
);
914 return XPROCESS (process
)->tty_name
;
917 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
919 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
921 (register Lisp_Object process
, Lisp_Object buffer
)
923 struct Lisp_Process
*p
;
925 CHECK_PROCESS (process
);
927 CHECK_BUFFER (buffer
);
928 p
= XPROCESS (process
);
930 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
931 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
932 setup_process_coding_systems (process
);
936 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
938 doc
: /* Return the buffer PROCESS is associated with.
939 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
940 (register Lisp_Object process
)
942 CHECK_PROCESS (process
);
943 return XPROCESS (process
)->buffer
;
946 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
948 doc
: /* Return the marker for the end of the last output from PROCESS. */)
949 (register Lisp_Object process
)
951 CHECK_PROCESS (process
);
952 return XPROCESS (process
)->mark
;
955 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
957 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
958 A value of t means stop accepting output from the process.
960 When a process has a filter, its buffer is not used for output.
961 Instead, each time it does output, the entire string of output is
962 passed to the filter.
964 The filter gets two arguments: the process and the string of output.
965 The string argument is normally a multibyte string, except:
966 - if the process' input coding system is no-conversion or raw-text,
967 it is a unibyte string (the non-converted input), or else
968 - if `default-enable-multibyte-characters' is nil, it is a unibyte
969 string (the result of converting the decoded input multibyte
970 string to unibyte with `string-make-unibyte'). */)
971 (register Lisp_Object process
, Lisp_Object filter
)
973 struct Lisp_Process
*p
;
975 CHECK_PROCESS (process
);
976 p
= XPROCESS (process
);
978 /* Don't signal an error if the process' input file descriptor
979 is closed. This could make debugging Lisp more difficult,
980 for example when doing something like
982 (setq process (start-process ...))
984 (set-process-filter process ...) */
988 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
990 FD_CLR (p
->infd
, &input_wait_mask
);
991 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
993 else if (EQ (p
->filter
, Qt
)
994 /* Network or serial process not stopped: */
995 && !EQ (p
->command
, Qt
))
997 FD_SET (p
->infd
, &input_wait_mask
);
998 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1003 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1004 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1005 setup_process_coding_systems (process
);
1009 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1011 doc
: /* Returns the filter function of PROCESS; nil if none.
1012 See `set-process-filter' for more info on filter functions. */)
1013 (register Lisp_Object process
)
1015 CHECK_PROCESS (process
);
1016 return XPROCESS (process
)->filter
;
1019 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1021 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1022 The sentinel is called as a function when the process changes state.
1023 It gets two arguments: the process, and a string describing the change. */)
1024 (register Lisp_Object process
, Lisp_Object sentinel
)
1026 struct Lisp_Process
*p
;
1028 CHECK_PROCESS (process
);
1029 p
= XPROCESS (process
);
1031 p
->sentinel
= sentinel
;
1032 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1033 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1037 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1039 doc
: /* Return the sentinel of PROCESS; nil if none.
1040 See `set-process-sentinel' for more info on sentinels. */)
1041 (register Lisp_Object process
)
1043 CHECK_PROCESS (process
);
1044 return XPROCESS (process
)->sentinel
;
1047 DEFUN ("set-process-window-size", Fset_process_window_size
,
1048 Sset_process_window_size
, 3, 3, 0,
1049 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1050 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1052 CHECK_PROCESS (process
);
1053 CHECK_NATNUM (height
);
1054 CHECK_NATNUM (width
);
1056 if (XPROCESS (process
)->infd
< 0
1057 || set_window_size (XPROCESS (process
)->infd
,
1058 XINT (height
), XINT (width
)) <= 0)
1064 DEFUN ("set-process-inherit-coding-system-flag",
1065 Fset_process_inherit_coding_system_flag
,
1066 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1067 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1068 If the second argument FLAG is non-nil, then the variable
1069 `buffer-file-coding-system' of the buffer associated with PROCESS
1070 will be bound to the value of the coding system used to decode
1073 This is useful when the coding system specified for the process buffer
1074 leaves either the character code conversion or the end-of-line conversion
1075 unspecified, or if the coding system used to decode the process output
1076 is more appropriate for saving the process buffer.
1078 Binding the variable `inherit-process-coding-system' to non-nil before
1079 starting the process is an alternative way of setting the inherit flag
1080 for the process which will run. */)
1081 (register Lisp_Object process
, Lisp_Object flag
)
1083 CHECK_PROCESS (process
);
1084 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1088 DEFUN ("set-process-query-on-exit-flag",
1089 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1091 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1092 If the second argument FLAG is non-nil, Emacs will query the user before
1093 exiting or killing a buffer if PROCESS is running. */)
1094 (register Lisp_Object process
, Lisp_Object flag
)
1096 CHECK_PROCESS (process
);
1097 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1101 DEFUN ("process-query-on-exit-flag",
1102 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1104 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1105 (register Lisp_Object process
)
1107 CHECK_PROCESS (process
);
1108 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1111 #ifdef DATAGRAM_SOCKETS
1112 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1115 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1117 doc
: /* Return the contact info of PROCESS; t for a real child.
1118 For a network or serial connection, the value depends on the optional
1119 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1120 SERVICE) for a network connection or (PORT SPEED) for a serial
1121 connection. If KEY is t, the complete contact information for the
1122 connection is returned, else the specific value for the keyword KEY is
1123 returned. See `make-network-process' or `make-serial-process' for a
1124 list of keywords. */)
1125 (register Lisp_Object process
, Lisp_Object key
)
1127 Lisp_Object contact
;
1129 CHECK_PROCESS (process
);
1130 contact
= XPROCESS (process
)->childp
;
1132 #ifdef DATAGRAM_SOCKETS
1133 if (DATAGRAM_CONN_P (process
)
1134 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1135 contact
= Fplist_put (contact
, QCremote
,
1136 Fprocess_datagram_address (process
));
1139 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1141 if (NILP (key
) && NETCONN_P (process
))
1142 return Fcons (Fplist_get (contact
, QChost
),
1143 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1144 if (NILP (key
) && SERIALCONN_P (process
))
1145 return Fcons (Fplist_get (contact
, QCport
),
1146 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1147 return Fplist_get (contact
, key
);
1150 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1152 doc
: /* Return the plist of PROCESS. */)
1153 (register Lisp_Object process
)
1155 CHECK_PROCESS (process
);
1156 return XPROCESS (process
)->plist
;
1159 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1161 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1162 (register Lisp_Object process
, Lisp_Object plist
)
1164 CHECK_PROCESS (process
);
1167 XPROCESS (process
)->plist
= plist
;
1171 #if 0 /* Turned off because we don't currently record this info
1172 in the process. Perhaps add it. */
1173 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1174 doc
: /* Return the connection type of PROCESS.
1175 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1176 a socket connection. */)
1177 (Lisp_Object process
)
1179 return XPROCESS (process
)->type
;
1183 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1184 doc
: /* Return the connection type of PROCESS.
1185 The value is either the symbol `real', `network', or `serial'.
1186 PROCESS may be a process, a buffer, the name of a process or buffer, or
1187 nil, indicating the current buffer's process. */)
1188 (Lisp_Object process
)
1191 proc
= get_process (process
);
1192 return XPROCESS (proc
)->type
;
1195 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1197 doc
: /* Convert network ADDRESS from internal format to a string.
1198 A 4 or 5 element vector represents an IPv4 address (with port number).
1199 An 8 or 9 element vector represents an IPv6 address (with port number).
1200 If optional second argument OMIT-PORT is non-nil, don't include a port
1201 number in the string, even when present in ADDRESS.
1202 Returns nil if format of ADDRESS is invalid. */)
1203 (Lisp_Object address
, Lisp_Object omit_port
)
1208 if (STRINGP (address
)) /* AF_LOCAL */
1211 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1213 register struct Lisp_Vector
*p
= XVECTOR (address
);
1214 EMACS_INT size
= p
->header
.size
;
1215 Lisp_Object args
[10];
1218 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1220 args
[0] = build_string ("%d.%d.%d.%d");
1225 args
[0] = build_string ("%d.%d.%d.%d:%d");
1228 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1230 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1235 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1241 for (i
= 0; i
< nargs
; i
++)
1243 EMACS_INT element
= XINT (p
->contents
[i
]);
1245 if (element
< 0 || element
> 65535)
1248 if (nargs
<= 5 /* IPv4 */
1249 && i
< 4 /* host, not port */
1253 args
[i
+1] = p
->contents
[i
];
1256 return Fformat (nargs
+1, args
);
1259 if (CONSP (address
))
1261 Lisp_Object args
[2];
1262 args
[0] = build_string ("<Family %d>");
1263 args
[1] = Fcar (address
);
1264 return Fformat (2, args
);
1270 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1271 doc
: /* Return a list of all processes. */)
1274 return Fmapcar (Qcdr
, Vprocess_alist
);
1277 /* Starting asynchronous inferior processes. */
1279 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1281 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1282 doc
: /* Start a program in a subprocess. Return the process object for it.
1283 NAME is name for process. It is modified if necessary to make it unique.
1284 BUFFER is the buffer (or buffer name) to associate with the process.
1286 Process output (both standard output and standard error streams) goes
1287 at end of BUFFER, unless you specify an output stream or filter
1288 function to handle the output. BUFFER may also be nil, meaning that
1289 this process is not associated with any buffer.
1291 PROGRAM is the program file name. It is searched for in `exec-path'
1292 (which see). If nil, just associate a pty with the buffer. Remaining
1293 arguments are strings to give program as arguments.
1295 If you want to separate standard output from standard error, invoke
1296 the command through a shell and redirect one of them using the shell
1299 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1300 (ptrdiff_t nargs
, Lisp_Object
*args
)
1302 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1303 register unsigned char **new_argv
;
1305 int count
= SPECPDL_INDEX ();
1309 buffer
= Fget_buffer_create (buffer
);
1311 /* Make sure that the child will be able to chdir to the current
1312 buffer's current directory, or its unhandled equivalent. We
1313 can't just have the child check for an error when it does the
1314 chdir, since it's in a vfork.
1316 We have to GCPRO around this because Fexpand_file_name and
1317 Funhandled_file_name_directory might call a file name handling
1318 function. The argument list is protected by the caller, so all
1319 we really have to worry about is buffer. */
1321 struct gcpro gcpro1
, gcpro2
;
1323 current_dir
= BVAR (current_buffer
, directory
);
1325 GCPRO2 (buffer
, current_dir
);
1327 current_dir
= Funhandled_file_name_directory (current_dir
);
1328 if (NILP (current_dir
))
1329 /* If the file name handler says that current_dir is unreachable, use
1330 a sensible default. */
1331 current_dir
= build_string ("~/");
1332 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1333 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1334 report_file_error ("Setting current directory",
1335 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1341 CHECK_STRING (name
);
1345 if (!NILP (program
))
1346 CHECK_STRING (program
);
1348 proc
= make_process (name
);
1349 /* If an error occurs and we can't start the process, we want to
1350 remove it from the process list. This means that each error
1351 check in create_process doesn't need to call remove_process
1352 itself; it's all taken care of here. */
1353 record_unwind_protect (start_process_unwind
, proc
);
1355 XPROCESS (proc
)->childp
= Qt
;
1356 XPROCESS (proc
)->plist
= Qnil
;
1357 XPROCESS (proc
)->type
= Qreal
;
1358 XPROCESS (proc
)->buffer
= buffer
;
1359 XPROCESS (proc
)->sentinel
= Qnil
;
1360 XPROCESS (proc
)->filter
= Qnil
;
1361 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1364 /* AKA GNUTLS_INITSTAGE(proc). */
1365 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1366 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1369 #ifdef ADAPTIVE_READ_BUFFERING
1370 XPROCESS (proc
)->adaptive_read_buffering
1371 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1372 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1375 /* Make the process marker point into the process buffer (if any). */
1376 if (BUFFERP (buffer
))
1377 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1378 BUF_ZV (XBUFFER (buffer
)),
1379 BUF_ZV_BYTE (XBUFFER (buffer
)));
1382 /* Decide coding systems for communicating with the process. Here
1383 we don't setup the structure coding_system nor pay attention to
1384 unibyte mode. They are done in create_process. */
1386 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1387 Lisp_Object coding_systems
= Qt
;
1388 Lisp_Object val
, *args2
;
1389 struct gcpro gcpro1
, gcpro2
;
1391 val
= Vcoding_system_for_read
;
1394 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1395 args2
[0] = Qstart_process
;
1396 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1397 GCPRO2 (proc
, current_dir
);
1398 if (!NILP (program
))
1399 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1401 if (CONSP (coding_systems
))
1402 val
= XCAR (coding_systems
);
1403 else if (CONSP (Vdefault_process_coding_system
))
1404 val
= XCAR (Vdefault_process_coding_system
);
1406 XPROCESS (proc
)->decode_coding_system
= val
;
1408 val
= Vcoding_system_for_write
;
1411 if (EQ (coding_systems
, Qt
))
1413 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1414 args2
[0] = Qstart_process
;
1415 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1416 GCPRO2 (proc
, current_dir
);
1417 if (!NILP (program
))
1418 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1421 if (CONSP (coding_systems
))
1422 val
= XCDR (coding_systems
);
1423 else if (CONSP (Vdefault_process_coding_system
))
1424 val
= XCDR (Vdefault_process_coding_system
);
1426 XPROCESS (proc
)->encode_coding_system
= val
;
1427 /* Note: At this moment, the above coding system may leave
1428 text-conversion or eol-conversion unspecified. They will be
1429 decided after we read output from the process and decode it by
1430 some coding system, or just before we actually send a text to
1435 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1436 XPROCESS (proc
)->decoding_carryover
= 0;
1437 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1439 XPROCESS (proc
)->inherit_coding_system_flag
1440 = !(NILP (buffer
) || !inherit_process_coding_system
);
1442 if (!NILP (program
))
1444 /* If program file name is not absolute, search our path for it.
1445 Put the name we will really use in TEM. */
1446 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1447 && !(SCHARS (program
) > 1
1448 && IS_DEVICE_SEP (SREF (program
, 1))))
1450 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1453 GCPRO4 (name
, program
, buffer
, current_dir
);
1454 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1457 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1458 tem
= Fexpand_file_name (tem
, Qnil
);
1462 if (!NILP (Ffile_directory_p (program
)))
1463 error ("Specified program for new process is a directory");
1467 /* If program file name starts with /: for quoting a magic name,
1469 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1470 && SREF (tem
, 1) == ':')
1471 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1474 Lisp_Object arg_encoding
= Qnil
;
1475 struct gcpro gcpro1
;
1478 /* Encode the file name and put it in NEW_ARGV.
1479 That's where the child will use it to execute the program. */
1480 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1482 /* Here we encode arguments by the coding system used for sending
1483 data to the process. We don't support using different coding
1484 systems for encoding arguments and for encoding data sent to the
1487 for (i
= 3; i
< nargs
; i
++)
1489 tem
= Fcons (args
[i
], tem
);
1490 CHECK_STRING (XCAR (tem
));
1491 if (STRING_MULTIBYTE (XCAR (tem
)))
1493 if (NILP (arg_encoding
))
1494 arg_encoding
= (complement_process_encoding_system
1495 (XPROCESS (proc
)->encode_coding_system
));
1497 code_convert_string_norecord
1498 (XCAR (tem
), arg_encoding
, 1));
1505 /* Now that everything is encoded we can collect the strings into
1507 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1508 new_argv
[nargs
- 2] = 0;
1510 for (i
= nargs
- 2; i
-- != 0; )
1512 new_argv
[i
] = SDATA (XCAR (tem
));
1516 create_process (proc
, (char **) new_argv
, current_dir
);
1521 return unbind_to (count
, proc
);
1524 /* This function is the unwind_protect form for Fstart_process. If
1525 PROC doesn't have its pid set, then we know someone has signaled
1526 an error and the process wasn't started successfully, so we should
1527 remove it from the process list. */
1529 start_process_unwind (Lisp_Object proc
)
1531 if (!PROCESSP (proc
))
1534 /* Was PROC started successfully?
1535 -2 is used for a pty with no process, eg for gdb. */
1536 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1537 remove_process (proc
);
1543 create_process_1 (struct atimer
*timer
)
1545 /* Nothing to do. */
1550 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1552 int inchannel
, outchannel
;
1555 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1556 int wait_child_setup
[2];
1560 struct sigaction sigint_action
;
1561 struct sigaction sigquit_action
;
1562 struct sigaction sigpipe_action
;
1564 struct sigaction sighup_action
;
1566 /* Use volatile to protect variables from being clobbered by longjmp. */
1567 volatile int forkin
, forkout
;
1568 volatile int pty_flag
= 0;
1570 extern char **environ
;
1573 inchannel
= outchannel
= -1;
1576 if (!NILP (Vprocess_connection_type
))
1577 outchannel
= inchannel
= allocate_pty ();
1581 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1582 /* On most USG systems it does not work to open the pty's tty here,
1583 then close it and reopen it in the child. */
1585 /* Don't let this terminal become our controlling terminal
1586 (in case we don't have one). */
1587 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1589 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1592 report_file_error ("Opening pty", Qnil
);
1594 forkin
= forkout
= -1;
1595 #endif /* not USG, or USG_SUBTTY_WORKS */
1599 #endif /* HAVE_PTYS */
1604 report_file_error ("Creating pipe", Qnil
);
1610 emacs_close (inchannel
);
1611 emacs_close (forkout
);
1612 report_file_error ("Creating pipe", Qnil
);
1618 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1622 tem
= pipe (wait_child_setup
);
1624 report_file_error ("Creating pipe", Qnil
);
1625 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1627 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1630 emacs_close (wait_child_setup
[0]);
1631 emacs_close (wait_child_setup
[1]);
1632 report_file_error ("Setting file descriptor flags", Qnil
);
1638 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1639 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1642 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1643 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1647 /* Record this as an active process, with its channels.
1648 As a result, child_setup will close Emacs's side of the pipes. */
1649 chan_process
[inchannel
] = process
;
1650 XPROCESS (process
)->infd
= inchannel
;
1651 XPROCESS (process
)->outfd
= outchannel
;
1653 /* Previously we recorded the tty descriptor used in the subprocess.
1654 It was only used for getting the foreground tty process, so now
1655 we just reopen the device (see emacs_get_tty_pgrp) as this is
1656 more portable (see USG_SUBTTY_WORKS above). */
1658 XPROCESS (process
)->pty_flag
= pty_flag
;
1659 XPROCESS (process
)->status
= Qrun
;
1661 /* Delay interrupts until we have a chance to store
1662 the new fork's pid in its process structure */
1663 sigemptyset (&blocked
);
1665 sigaddset (&blocked
, SIGCHLD
);
1667 #ifdef HAVE_WORKING_VFORK
1668 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1669 this sets the parent's signal handlers as well as the child's.
1670 So delay all interrupts whose handlers the child might munge,
1671 and record the current handlers so they can be restored later. */
1672 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1673 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1674 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1676 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1678 #endif /* HAVE_WORKING_VFORK */
1679 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1681 FD_SET (inchannel
, &input_wait_mask
);
1682 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1683 if (inchannel
> max_process_desc
)
1684 max_process_desc
= inchannel
;
1686 /* Until we store the proper pid, enable sigchld_handler
1687 to recognize an unknown pid as standing for this process.
1688 It is very important not to let this `marker' value stay
1689 in the table after this function has returned; if it does
1690 it might cause call-process to hang and subsequent asynchronous
1691 processes to get their return values scrambled. */
1692 XPROCESS (process
)->pid
= -1;
1694 /* This must be called after the above line because it may signal an
1696 setup_process_coding_systems (process
);
1701 /* child_setup must clobber environ on systems with true vfork.
1702 Protect it from permanent change. */
1703 char **save_environ
= environ
;
1704 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1709 #endif /* not WINDOWSNT */
1711 int xforkin
= forkin
;
1712 int xforkout
= forkout
;
1714 #if 0 /* This was probably a mistake--it duplicates code later on,
1715 but fails to handle all the cases. */
1716 /* Make sure SIGCHLD is not blocked in the child. */
1717 sigsetmask (SIGEMPTYMASK
);
1720 /* Make the pty be the controlling terminal of the process. */
1722 /* First, disconnect its current controlling terminal. */
1724 /* We tried doing setsid only if pty_flag, but it caused
1725 process_set_signal to fail on SGI when using a pipe. */
1727 /* Make the pty's terminal the controlling terminal. */
1728 if (pty_flag
&& xforkin
>= 0)
1731 /* We ignore the return value
1732 because faith@cs.unc.edu says that is necessary on Linux. */
1733 ioctl (xforkin
, TIOCSCTTY
, 0);
1736 #else /* not HAVE_SETSID */
1738 /* It's very important to call setpgrp here and no time
1739 afterwards. Otherwise, we lose our controlling tty which
1740 is set when we open the pty. */
1743 #endif /* not HAVE_SETSID */
1744 #if defined (LDISC1)
1745 if (pty_flag
&& xforkin
>= 0)
1748 tcgetattr (xforkin
, &t
);
1750 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1751 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1754 #if defined (NTTYDISC) && defined (TIOCSETD)
1755 if (pty_flag
&& xforkin
>= 0)
1757 /* Use new line discipline. */
1758 int ldisc
= NTTYDISC
;
1759 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1764 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1765 can do TIOCSPGRP only to the process's controlling tty. */
1768 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1769 I can't test it since I don't have 4.3. */
1770 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1773 ioctl (j
, TIOCNOTTY
, 0);
1777 /* In order to get a controlling terminal on some versions
1778 of BSD, it is necessary to put the process in pgrp 0
1779 before it opens the terminal. */
1787 #endif /* TIOCNOTTY */
1789 #if !defined (DONT_REOPEN_PTY)
1790 /*** There is a suggestion that this ought to be a
1791 conditional on TIOCSPGRP,
1792 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1793 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1794 that system does seem to need this code, even though
1795 both HAVE_SETSID and TIOCSCTTY are defined. */
1796 /* Now close the pty (if we had it open) and reopen it.
1797 This makes the pty the controlling terminal of the subprocess. */
1801 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1804 emacs_close (xforkin
);
1805 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1809 emacs_write (1, "Couldn't open the pty terminal ", 31);
1810 emacs_write (1, pty_name
, strlen (pty_name
));
1811 emacs_write (1, "\n", 1);
1816 #endif /* not DONT_REOPEN_PTY */
1818 #ifdef SETUP_SLAVE_PTY
1823 #endif /* SETUP_SLAVE_PTY */
1825 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1826 Now reenable it in the child, so it will die when we want it to. */
1828 signal (SIGHUP
, SIG_DFL
);
1830 #endif /* HAVE_PTYS */
1832 signal (SIGINT
, SIG_DFL
);
1833 signal (SIGQUIT
, SIG_DFL
);
1834 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1836 signal (SIGPIPE
, SIG_DFL
);
1838 /* Stop blocking signals in the child. */
1839 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1842 child_setup_tty (xforkout
);
1844 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1845 new_argv
, 1, encoded_current_dir
);
1846 #else /* not WINDOWSNT */
1848 emacs_close (wait_child_setup
[0]);
1850 child_setup (xforkin
, xforkout
, xforkout
,
1851 new_argv
, 1, encoded_current_dir
);
1852 #endif /* not WINDOWSNT */
1854 environ
= save_environ
;
1859 /* This runs in the Emacs process. */
1863 emacs_close (forkin
);
1864 if (forkin
!= forkout
&& forkout
>= 0)
1865 emacs_close (forkout
);
1869 /* vfork succeeded. */
1870 XPROCESS (process
)->pid
= pid
;
1873 register_child (pid
, inchannel
);
1874 #endif /* WINDOWSNT */
1876 /* If the subfork execv fails, and it exits,
1877 this close hangs. I don't know why.
1878 So have an interrupt jar it loose. */
1880 struct atimer
*timer
;
1884 EMACS_SET_SECS_USECS (offset
, 1, 0);
1885 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1888 emacs_close (forkin
);
1890 cancel_atimer (timer
);
1894 if (forkin
!= forkout
&& forkout
>= 0)
1895 emacs_close (forkout
);
1899 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1902 XPROCESS (process
)->tty_name
= Qnil
;
1904 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1905 /* Wait for child_setup to complete in case that vfork is
1906 actually defined as fork. The descriptor wait_child_setup[1]
1907 of a pipe is closed at the child side either by close-on-exec
1908 on successful execvp or the _exit call in child_setup. */
1912 emacs_close (wait_child_setup
[1]);
1913 emacs_read (wait_child_setup
[0], &dummy
, 1);
1914 emacs_close (wait_child_setup
[0]);
1919 /* Restore the signal state whether vfork succeeded or not.
1920 (We will signal an error, below, if it failed.) */
1921 #ifdef HAVE_WORKING_VFORK
1922 /* Restore the parent's signal handlers. */
1923 sigaction (SIGINT
, &sigint_action
, 0);
1924 sigaction (SIGQUIT
, &sigquit_action
, 0);
1925 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1927 sigaction (SIGHUP
, &sighup_action
, 0);
1929 #endif /* HAVE_WORKING_VFORK */
1930 /* Stop blocking signals in the parent. */
1931 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1933 /* Now generate the error if vfork failed. */
1935 report_file_error ("Doing vfork", Qnil
);
1939 create_pty (Lisp_Object process
)
1941 int inchannel
, outchannel
;
1944 inchannel
= outchannel
= -1;
1947 if (!NILP (Vprocess_connection_type
))
1948 outchannel
= inchannel
= allocate_pty ();
1952 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1953 /* On most USG systems it does not work to open the pty's tty here,
1954 then close it and reopen it in the child. */
1956 /* Don't let this terminal become our controlling terminal
1957 (in case we don't have one). */
1958 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1960 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1963 report_file_error ("Opening pty", Qnil
);
1964 #if defined (DONT_REOPEN_PTY)
1965 /* In the case that vfork is defined as fork, the parent process
1966 (Emacs) may send some data before the child process completes
1967 tty options setup. So we setup tty before forking. */
1968 child_setup_tty (forkout
);
1969 #endif /* DONT_REOPEN_PTY */
1970 #endif /* not USG, or USG_SUBTTY_WORKS */
1973 #endif /* HAVE_PTYS */
1976 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1977 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1980 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1981 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1985 /* Record this as an active process, with its channels.
1986 As a result, child_setup will close Emacs's side of the pipes. */
1987 chan_process
[inchannel
] = process
;
1988 XPROCESS (process
)->infd
= inchannel
;
1989 XPROCESS (process
)->outfd
= outchannel
;
1991 /* Previously we recorded the tty descriptor used in the subprocess.
1992 It was only used for getting the foreground tty process, so now
1993 we just reopen the device (see emacs_get_tty_pgrp) as this is
1994 more portable (see USG_SUBTTY_WORKS above). */
1996 XPROCESS (process
)->pty_flag
= pty_flag
;
1997 XPROCESS (process
)->status
= Qrun
;
1998 setup_process_coding_systems (process
);
2000 FD_SET (inchannel
, &input_wait_mask
);
2001 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2002 if (inchannel
> max_process_desc
)
2003 max_process_desc
= inchannel
;
2005 XPROCESS (process
)->pid
= -2;
2008 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2011 XPROCESS (process
)->tty_name
= Qnil
;
2015 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2016 The address family of sa is not included in the result. */
2019 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2021 Lisp_Object address
;
2024 register struct Lisp_Vector
*p
;
2026 /* Workaround for a bug in getsockname on BSD: Names bound to
2027 sockets in the UNIX domain are inaccessible; getsockname returns
2028 a zero length name. */
2029 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2030 return empty_unibyte_string
;
2032 switch (sa
->sa_family
)
2036 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2037 len
= sizeof (sin
->sin_addr
) + 1;
2038 address
= Fmake_vector (make_number (len
), Qnil
);
2039 p
= XVECTOR (address
);
2040 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2041 cp
= (unsigned char *) &sin
->sin_addr
;
2047 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2048 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2049 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2050 address
= Fmake_vector (make_number (len
), Qnil
);
2051 p
= XVECTOR (address
);
2052 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2053 for (i
= 0; i
< len
; i
++)
2054 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2058 #ifdef HAVE_LOCAL_SOCKETS
2061 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2062 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2063 if (sockun
->sun_path
[i
] == 0)
2065 return make_unibyte_string (sockun
->sun_path
, i
);
2069 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2070 address
= Fcons (make_number (sa
->sa_family
),
2071 Fmake_vector (make_number (len
), Qnil
));
2072 p
= XVECTOR (XCDR (address
));
2073 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2079 p
->contents
[i
++] = make_number (*cp
++);
2085 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2088 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2090 register struct Lisp_Vector
*p
;
2092 if (VECTORP (address
))
2094 p
= XVECTOR (address
);
2095 if (p
->header
.size
== 5)
2098 return sizeof (struct sockaddr_in
);
2101 else if (p
->header
.size
== 9)
2103 *familyp
= AF_INET6
;
2104 return sizeof (struct sockaddr_in6
);
2108 #ifdef HAVE_LOCAL_SOCKETS
2109 else if (STRINGP (address
))
2111 *familyp
= AF_LOCAL
;
2112 return sizeof (struct sockaddr_un
);
2115 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2117 struct sockaddr
*sa
;
2118 *familyp
= XINT (XCAR (address
));
2119 p
= XVECTOR (XCDR (address
));
2120 return p
->header
.size
+ sizeof (sa
->sa_family
);
2125 /* Convert an address object (vector or string) to an internal sockaddr.
2127 The address format has been basically validated by
2128 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2129 it could have come from user data. So if FAMILY is not valid,
2130 we return after zeroing *SA. */
2133 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2135 register struct Lisp_Vector
*p
;
2136 register unsigned char *cp
= NULL
;
2139 memset (sa
, 0, len
);
2141 if (VECTORP (address
))
2143 p
= XVECTOR (address
);
2144 if (family
== AF_INET
)
2146 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2147 len
= sizeof (sin
->sin_addr
) + 1;
2148 i
= XINT (p
->contents
[--len
]);
2149 sin
->sin_port
= htons (i
);
2150 cp
= (unsigned char *)&sin
->sin_addr
;
2151 sa
->sa_family
= family
;
2154 else if (family
== AF_INET6
)
2156 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2157 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2158 len
= sizeof (sin6
->sin6_addr
) + 1;
2159 i
= XINT (p
->contents
[--len
]);
2160 sin6
->sin6_port
= htons (i
);
2161 for (i
= 0; i
< len
; i
++)
2162 if (INTEGERP (p
->contents
[i
]))
2164 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2167 sa
->sa_family
= family
;
2174 else if (STRINGP (address
))
2176 #ifdef HAVE_LOCAL_SOCKETS
2177 if (family
== AF_LOCAL
)
2179 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2180 cp
= SDATA (address
);
2181 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2182 sockun
->sun_path
[i
] = *cp
++;
2183 sa
->sa_family
= family
;
2190 p
= XVECTOR (XCDR (address
));
2191 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2194 for (i
= 0; i
< len
; i
++)
2195 if (INTEGERP (p
->contents
[i
]))
2196 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2199 #ifdef DATAGRAM_SOCKETS
2200 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2202 doc
: /* Get the current datagram address associated with PROCESS. */)
2203 (Lisp_Object process
)
2207 CHECK_PROCESS (process
);
2209 if (!DATAGRAM_CONN_P (process
))
2212 channel
= XPROCESS (process
)->infd
;
2213 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2214 datagram_address
[channel
].len
);
2217 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2219 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2220 Returns nil upon error setting address, ADDRESS otherwise. */)
2221 (Lisp_Object process
, Lisp_Object address
)
2226 CHECK_PROCESS (process
);
2228 if (!DATAGRAM_CONN_P (process
))
2231 channel
= XPROCESS (process
)->infd
;
2233 len
= get_lisp_to_sockaddr_size (address
, &family
);
2234 if (datagram_address
[channel
].len
!= len
)
2236 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2242 static const struct socket_options
{
2243 /* The name of this option. Should be lowercase version of option
2244 name without SO_ prefix. */
2246 /* Option level SOL_... */
2248 /* Option number SO_... */
2250 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2251 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2252 } socket_options
[] =
2254 #ifdef SO_BINDTODEVICE
2255 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2258 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2261 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2264 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2267 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2270 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2273 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2276 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2278 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2281 /* Set option OPT to value VAL on socket S.
2283 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2284 Signals an error if setting a known option fails.
2288 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2291 const struct socket_options
*sopt
;
2296 name
= SSDATA (SYMBOL_NAME (opt
));
2297 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2298 if (strcmp (name
, sopt
->name
) == 0)
2301 switch (sopt
->opttype
)
2306 optval
= NILP (val
) ? 0 : 1;
2307 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2308 &optval
, sizeof (optval
));
2316 optval
= XINT (val
);
2318 error ("Bad option value for %s", name
);
2319 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2320 &optval
, sizeof (optval
));
2324 #ifdef SO_BINDTODEVICE
2327 char devname
[IFNAMSIZ
+1];
2329 /* This is broken, at least in the Linux 2.4 kernel.
2330 To unbind, the arg must be a zero integer, not the empty string.
2331 This should work on all systems. KFS. 2003-09-23. */
2332 memset (devname
, 0, sizeof devname
);
2335 char *arg
= SSDATA (val
);
2336 int len
= min (strlen (arg
), IFNAMSIZ
);
2337 memcpy (devname
, arg
, len
);
2339 else if (!NILP (val
))
2340 error ("Bad option value for %s", name
);
2341 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2350 struct linger linger
;
2353 linger
.l_linger
= 0;
2355 linger
.l_linger
= XINT (val
);
2357 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2358 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2359 &linger
, sizeof (linger
));
2369 report_file_error ("Cannot set network option",
2370 Fcons (opt
, Fcons (val
, Qnil
)));
2371 return (1 << sopt
->optbit
);
2375 DEFUN ("set-network-process-option",
2376 Fset_network_process_option
, Sset_network_process_option
,
2378 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2379 See `make-network-process' for a list of options and values.
2380 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2381 OPTION is not a supported option, return nil instead; otherwise return t. */)
2382 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2385 struct Lisp_Process
*p
;
2387 CHECK_PROCESS (process
);
2388 p
= XPROCESS (process
);
2389 if (!NETCONN1_P (p
))
2390 error ("Process is not a network process");
2394 error ("Process is not running");
2396 if (set_socket_option (s
, option
, value
))
2398 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2402 if (NILP (no_error
))
2403 error ("Unknown or unsupported option");
2409 DEFUN ("serial-process-configure",
2410 Fserial_process_configure
,
2411 Sserial_process_configure
,
2413 doc
: /* Configure speed, bytesize, etc. of a serial process.
2415 Arguments are specified as keyword/argument pairs. Attributes that
2416 are not given are re-initialized from the process's current
2417 configuration (available via the function `process-contact') or set to
2418 reasonable default values. The following arguments are defined:
2424 -- Any of these arguments can be given to identify the process that is
2425 to be configured. If none of these arguments is given, the current
2426 buffer's process is used.
2428 :speed SPEED -- SPEED is the speed of the serial port in bits per
2429 second, also called baud rate. Any value can be given for SPEED, but
2430 most serial ports work only at a few defined values between 1200 and
2431 115200, with 9600 being the most common value. If SPEED is nil, the
2432 serial port is not configured any further, i.e., all other arguments
2433 are ignored. This may be useful for special serial ports such as
2434 Bluetooth-to-serial converters which can only be configured through AT
2435 commands. A value of nil for SPEED can be used only when passed
2436 through `make-serial-process' or `serial-term'.
2438 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2439 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2441 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2442 `odd' (use odd parity), or the symbol `even' (use even parity). If
2443 PARITY is not given, no parity is used.
2445 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2446 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2447 is not given or nil, 1 stopbit is used.
2449 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2450 flowcontrol to be used, which is either nil (don't use flowcontrol),
2451 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2452 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2453 flowcontrol is used.
2455 `serial-process-configure' is called by `make-serial-process' for the
2456 initial configuration of the serial port.
2460 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2462 \(serial-process-configure
2463 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2465 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2467 usage: (serial-process-configure &rest ARGS) */)
2468 (ptrdiff_t nargs
, Lisp_Object
*args
)
2470 struct Lisp_Process
*p
;
2471 Lisp_Object contact
= Qnil
;
2472 Lisp_Object proc
= Qnil
;
2473 struct gcpro gcpro1
;
2475 contact
= Flist (nargs
, args
);
2478 proc
= Fplist_get (contact
, QCprocess
);
2480 proc
= Fplist_get (contact
, QCname
);
2482 proc
= Fplist_get (contact
, QCbuffer
);
2484 proc
= Fplist_get (contact
, QCport
);
2485 proc
= get_process (proc
);
2486 p
= XPROCESS (proc
);
2487 if (!EQ (p
->type
, Qserial
))
2488 error ("Not a serial process");
2490 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2496 serial_configure (p
, contact
);
2502 /* Used by make-serial-process to recover from errors. */
2504 make_serial_process_unwind (Lisp_Object proc
)
2506 if (!PROCESSP (proc
))
2508 remove_process (proc
);
2512 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2514 doc
: /* Create and return a serial port process.
2516 In Emacs, serial port connections are represented by process objects,
2517 so input and output work as for subprocesses, and `delete-process'
2518 closes a serial port connection. However, a serial process has no
2519 process id, it cannot be signaled, and the status codes are different
2520 from normal processes.
2522 `make-serial-process' creates a process and a buffer, on which you
2523 probably want to use `process-send-string'. Try \\[serial-term] for
2524 an interactive terminal. See below for examples.
2526 Arguments are specified as keyword/argument pairs. The following
2527 arguments are defined:
2529 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2530 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2531 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2532 the backslashes in strings).
2534 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2535 which is called by `make-serial-process'.
2537 :name NAME -- NAME is the name of the process. If NAME is not given,
2538 the value of PORT is used.
2540 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2541 with the process. Process output goes at the end of that buffer,
2542 unless you specify an output stream or filter function to handle the
2543 output. If BUFFER is not given, the value of NAME is used.
2545 :coding CODING -- If CODING is a symbol, it specifies the coding
2546 system used for both reading and writing for this process. If CODING
2547 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2548 ENCODING is used for writing.
2550 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2551 the process is running. If BOOL is not given, query before exiting.
2553 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2554 In the stopped state, a serial process does not accept incoming data,
2555 but you can send outgoing data. The stopped state is cleared by
2556 `continue-process' and set by `stop-process'.
2558 :filter FILTER -- Install FILTER as the process filter.
2560 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2562 :plist PLIST -- Install PLIST as the initial plist of the process.
2569 -- These arguments are handled by `serial-process-configure', which is
2570 called by `make-serial-process'.
2572 The original argument list, possibly modified by later configuration,
2573 is available via the function `process-contact'.
2577 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2579 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2581 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2583 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2585 usage: (make-serial-process &rest ARGS) */)
2586 (ptrdiff_t nargs
, Lisp_Object
*args
)
2589 Lisp_Object proc
, contact
, port
;
2590 struct Lisp_Process
*p
;
2591 struct gcpro gcpro1
;
2592 Lisp_Object name
, buffer
;
2593 Lisp_Object tem
, val
;
2594 int specpdl_count
= -1;
2599 contact
= Flist (nargs
, args
);
2602 port
= Fplist_get (contact
, QCport
);
2604 error ("No port specified");
2605 CHECK_STRING (port
);
2607 if (NILP (Fplist_member (contact
, QCspeed
)))
2608 error (":speed not specified");
2609 if (!NILP (Fplist_get (contact
, QCspeed
)))
2610 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2612 name
= Fplist_get (contact
, QCname
);
2615 CHECK_STRING (name
);
2616 proc
= make_process (name
);
2617 specpdl_count
= SPECPDL_INDEX ();
2618 record_unwind_protect (make_serial_process_unwind
, proc
);
2619 p
= XPROCESS (proc
);
2621 fd
= serial_open (SSDATA (port
));
2624 if (fd
> max_process_desc
)
2625 max_process_desc
= fd
;
2626 chan_process
[fd
] = proc
;
2628 buffer
= Fplist_get (contact
, QCbuffer
);
2631 buffer
= Fget_buffer_create (buffer
);
2634 p
->childp
= contact
;
2635 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2637 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2638 p
->filter
= Fplist_get (contact
, QCfilter
);
2640 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2641 p
->kill_without_query
= 1;
2642 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2646 if (!EQ (p
->command
, Qt
))
2648 FD_SET (fd
, &input_wait_mask
);
2649 FD_SET (fd
, &non_keyboard_wait_mask
);
2652 if (BUFFERP (buffer
))
2654 set_marker_both (p
->mark
, buffer
,
2655 BUF_ZV (XBUFFER (buffer
)),
2656 BUF_ZV_BYTE (XBUFFER (buffer
)));
2659 tem
= Fplist_member (contact
, QCcoding
);
2660 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2666 val
= XCAR (XCDR (tem
));
2670 else if (!NILP (Vcoding_system_for_read
))
2671 val
= Vcoding_system_for_read
;
2672 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2673 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2675 p
->decode_coding_system
= val
;
2680 val
= XCAR (XCDR (tem
));
2684 else if (!NILP (Vcoding_system_for_write
))
2685 val
= Vcoding_system_for_write
;
2686 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2687 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2689 p
->encode_coding_system
= val
;
2691 setup_process_coding_systems (proc
);
2692 p
->decoding_buf
= empty_unibyte_string
;
2693 p
->decoding_carryover
= 0;
2694 p
->encoding_buf
= empty_unibyte_string
;
2695 p
->inherit_coding_system_flag
2696 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2698 Fserial_process_configure (nargs
, args
);
2700 specpdl_ptr
= specpdl
+ specpdl_count
;
2706 /* Create a network stream/datagram client/server process. Treated
2707 exactly like a normal process when reading and writing. Primary
2708 differences are in status display and process deletion. A network
2709 connection has no PID; you cannot signal it. All you can do is
2710 stop/continue it and deactivate/close it via delete-process */
2712 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2714 doc
: /* Create and return a network server or client process.
2716 In Emacs, network connections are represented by process objects, so
2717 input and output work as for subprocesses and `delete-process' closes
2718 a network connection. However, a network process has no process id,
2719 it cannot be signaled, and the status codes are different from normal
2722 Arguments are specified as keyword/argument pairs. The following
2723 arguments are defined:
2725 :name NAME -- NAME is name for process. It is modified if necessary
2728 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2729 with the process. Process output goes at end of that buffer, unless
2730 you specify an output stream or filter function to handle the output.
2731 BUFFER may be also nil, meaning that this process is not associated
2734 :host HOST -- HOST is name of the host to connect to, or its IP
2735 address. The symbol `local' specifies the local host. If specified
2736 for a server process, it must be a valid name or address for the local
2737 host, and only clients connecting to that address will be accepted.
2739 :service SERVICE -- SERVICE is name of the service desired, or an
2740 integer specifying a port number to connect to. If SERVICE is t,
2741 a random port number is selected for the server. (If Emacs was
2742 compiled with getaddrinfo, a port number can also be specified as a
2743 string, e.g. "80", as well as an integer. This is not portable.)
2745 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2746 stream type connection, `datagram' creates a datagram type connection,
2747 `seqpacket' creates a reliable datagram connection.
2749 :family FAMILY -- FAMILY is the address (and protocol) family for the
2750 service specified by HOST and SERVICE. The default (nil) is to use
2751 whatever address family (IPv4 or IPv6) that is defined for the host
2752 and port number specified by HOST and SERVICE. Other address families
2754 local -- for a local (i.e. UNIX) address specified by SERVICE.
2755 ipv4 -- use IPv4 address family only.
2756 ipv6 -- use IPv6 address family only.
2758 :local ADDRESS -- ADDRESS is the local address used for the connection.
2759 This parameter is ignored when opening a client process. When specified
2760 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2762 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2763 connection. This parameter is ignored when opening a stream server
2764 process. For a datagram server process, it specifies the initial
2765 setting of the remote datagram address. When specified for a client
2766 process, the FAMILY, HOST, and SERVICE args are ignored.
2768 The format of ADDRESS depends on the address family:
2769 - An IPv4 address is represented as an vector of integers [A B C D P]
2770 corresponding to numeric IP address A.B.C.D and port number P.
2771 - A local address is represented as a string with the address in the
2772 local address space.
2773 - An "unsupported family" address is represented by a cons (F . AV)
2774 where F is the family number and AV is a vector containing the socket
2775 address data with one element per address data byte. Do not rely on
2776 this format in portable code, as it may depend on implementation
2777 defined constants, data sizes, and data structure alignment.
2779 :coding CODING -- If CODING is a symbol, it specifies the coding
2780 system used for both reading and writing for this process. If CODING
2781 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2782 ENCODING is used for writing.
2784 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2785 return without waiting for the connection to complete; instead, the
2786 sentinel function will be called with second arg matching "open" (if
2787 successful) or "failed" when the connect completes. Default is to use
2788 a blocking connect (i.e. wait) for stream type connections.
2790 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2791 running when Emacs is exited.
2793 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2794 In the stopped state, a server process does not accept new
2795 connections, and a client process does not handle incoming traffic.
2796 The stopped state is cleared by `continue-process' and set by
2799 :filter FILTER -- Install FILTER as the process filter.
2801 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2802 process filter are multibyte, otherwise they are unibyte.
2803 If this keyword is not specified, the strings are multibyte if
2804 `default-enable-multibyte-characters' is non-nil.
2806 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2808 :log LOG -- Install LOG as the server process log function. This
2809 function is called when the server accepts a network connection from a
2810 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2811 is the server process, CLIENT is the new process for the connection,
2812 and MESSAGE is a string.
2814 :plist PLIST -- Install PLIST as the new process' initial plist.
2816 :server QLEN -- if QLEN is non-nil, create a server process for the
2817 specified FAMILY, SERVICE, and connection type (stream or datagram).
2818 If QLEN is an integer, it is used as the max. length of the server's
2819 pending connection queue (also known as the backlog); the default
2820 queue length is 5. Default is to create a client process.
2822 The following network options can be specified for this connection:
2824 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2825 :dontroute BOOL -- Only send to directly connected hosts.
2826 :keepalive BOOL -- Send keep-alive messages on network stream.
2827 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2828 :oobinline BOOL -- Place out-of-band data in receive data stream.
2829 :priority INT -- Set protocol defined priority for sent packets.
2830 :reuseaddr BOOL -- Allow reusing a recently used local address
2831 (this is allowed by default for a server process).
2832 :bindtodevice NAME -- bind to interface NAME. Using this may require
2833 special privileges on some systems.
2835 Consult the relevant system programmer's manual pages for more
2836 information on using these options.
2839 A server process will listen for and accept connections from clients.
2840 When a client connection is accepted, a new network process is created
2841 for the connection with the following parameters:
2843 - The client's process name is constructed by concatenating the server
2844 process' NAME and a client identification string.
2845 - If the FILTER argument is non-nil, the client process will not get a
2846 separate process buffer; otherwise, the client's process buffer is a newly
2847 created buffer named after the server process' BUFFER name or process
2848 NAME concatenated with the client identification string.
2849 - The connection type and the process filter and sentinel parameters are
2850 inherited from the server process' TYPE, FILTER and SENTINEL.
2851 - The client process' contact info is set according to the client's
2852 addressing information (typically an IP address and a port number).
2853 - The client process' plist is initialized from the server's plist.
2855 Notice that the FILTER and SENTINEL args are never used directly by
2856 the server process. Also, the BUFFER argument is not used directly by
2857 the server process, but via the optional :log function, accepted (and
2858 failed) connections may be logged in the server process' buffer.
2860 The original argument list, modified with the actual connection
2861 information, is available via the `process-contact' function.
2863 usage: (make-network-process &rest ARGS) */)
2864 (ptrdiff_t nargs
, Lisp_Object
*args
)
2867 Lisp_Object contact
;
2868 struct Lisp_Process
*p
;
2869 #ifdef HAVE_GETADDRINFO
2870 struct addrinfo ai
, *res
, *lres
;
2871 struct addrinfo hints
;
2872 const char *portstring
;
2874 #else /* HAVE_GETADDRINFO */
2875 struct _emacs_addrinfo
2881 struct sockaddr
*ai_addr
;
2882 struct _emacs_addrinfo
*ai_next
;
2884 #endif /* HAVE_GETADDRINFO */
2885 struct sockaddr_in address_in
;
2886 #ifdef HAVE_LOCAL_SOCKETS
2887 struct sockaddr_un address_un
;
2892 int s
= -1, outch
, inch
;
2893 struct gcpro gcpro1
;
2894 int count
= SPECPDL_INDEX ();
2896 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2898 Lisp_Object name
, buffer
, host
, service
, address
;
2899 Lisp_Object filter
, sentinel
;
2900 int is_non_blocking_client
= 0;
2901 int is_server
= 0, backlog
= 5;
2908 /* Save arguments for process-contact and clone-process. */
2909 contact
= Flist (nargs
, args
);
2913 /* Ensure socket support is loaded if available. */
2914 init_winsock (TRUE
);
2917 /* :type TYPE (nil: stream, datagram */
2918 tem
= Fplist_get (contact
, QCtype
);
2920 socktype
= SOCK_STREAM
;
2921 #ifdef DATAGRAM_SOCKETS
2922 else if (EQ (tem
, Qdatagram
))
2923 socktype
= SOCK_DGRAM
;
2925 #ifdef HAVE_SEQPACKET
2926 else if (EQ (tem
, Qseqpacket
))
2927 socktype
= SOCK_SEQPACKET
;
2930 error ("Unsupported connection type");
2933 tem
= Fplist_get (contact
, QCserver
);
2936 /* Don't support network sockets when non-blocking mode is
2937 not available, since a blocked Emacs is not useful. */
2938 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2939 error ("Network servers not supported");
2943 backlog
= XINT (tem
);
2947 /* Make QCaddress an alias for :local (server) or :remote (client). */
2948 QCaddress
= is_server
? QClocal
: QCremote
;
2951 if (!is_server
&& socktype
!= SOCK_DGRAM
2952 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2954 #ifndef NON_BLOCKING_CONNECT
2955 error ("Non-blocking connect not supported");
2957 is_non_blocking_client
= 1;
2961 name
= Fplist_get (contact
, QCname
);
2962 buffer
= Fplist_get (contact
, QCbuffer
);
2963 filter
= Fplist_get (contact
, QCfilter
);
2964 sentinel
= Fplist_get (contact
, QCsentinel
);
2966 CHECK_STRING (name
);
2968 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2969 ai
.ai_socktype
= socktype
;
2974 /* :local ADDRESS or :remote ADDRESS */
2975 address
= Fplist_get (contact
, QCaddress
);
2976 if (!NILP (address
))
2978 host
= service
= Qnil
;
2980 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2981 error ("Malformed :address");
2982 ai
.ai_family
= family
;
2983 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2984 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2988 /* :family FAMILY -- nil (for Inet), local, or integer. */
2989 tem
= Fplist_get (contact
, QCfamily
);
2992 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2998 #ifdef HAVE_LOCAL_SOCKETS
2999 else if (EQ (tem
, Qlocal
))
3003 else if (EQ (tem
, Qipv6
))
3006 else if (EQ (tem
, Qipv4
))
3008 else if (INTEGERP (tem
))
3009 family
= XINT (tem
);
3011 error ("Unknown address family");
3013 ai
.ai_family
= family
;
3015 /* :service SERVICE -- string, integer (port number), or t (random port). */
3016 service
= Fplist_get (contact
, QCservice
);
3018 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3019 host
= Fplist_get (contact
, QChost
);
3022 if (EQ (host
, Qlocal
))
3023 /* Depending on setup, "localhost" may map to different IPv4 and/or
3024 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3025 host
= build_string ("127.0.0.1");
3026 CHECK_STRING (host
);
3029 #ifdef HAVE_LOCAL_SOCKETS
3030 if (family
== AF_LOCAL
)
3034 message (":family local ignores the :host \"%s\" property",
3036 contact
= Fplist_put (contact
, QChost
, Qnil
);
3039 CHECK_STRING (service
);
3040 memset (&address_un
, 0, sizeof address_un
);
3041 address_un
.sun_family
= AF_LOCAL
;
3042 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3043 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3044 ai
.ai_addrlen
= sizeof address_un
;
3049 /* Slow down polling to every ten seconds.
3050 Some kernels have a bug which causes retrying connect to fail
3051 after a connect. Polling can interfere with gethostbyname too. */
3052 #ifdef POLL_FOR_INPUT
3053 if (socktype
!= SOCK_DGRAM
)
3055 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3056 bind_polling_period (10);
3060 #ifdef HAVE_GETADDRINFO
3061 /* If we have a host, use getaddrinfo to resolve both host and service.
3062 Otherwise, use getservbyname to lookup the service. */
3066 /* SERVICE can either be a string or int.
3067 Convert to a C string for later use by getaddrinfo. */
3068 if (EQ (service
, Qt
))
3070 else if (INTEGERP (service
))
3072 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3073 portstring
= portbuf
;
3077 CHECK_STRING (service
);
3078 portstring
= SSDATA (service
);
3083 memset (&hints
, 0, sizeof (hints
));
3085 hints
.ai_family
= family
;
3086 hints
.ai_socktype
= socktype
;
3087 hints
.ai_protocol
= 0;
3089 #ifdef HAVE_RES_INIT
3093 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3095 #ifdef HAVE_GAI_STRERROR
3096 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3098 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3104 #endif /* HAVE_GETADDRINFO */
3106 /* We end up here if getaddrinfo is not defined, or in case no hostname
3107 has been specified (e.g. for a local server process). */
3109 if (EQ (service
, Qt
))
3111 else if (INTEGERP (service
))
3112 port
= htons ((unsigned short) XINT (service
));
3115 struct servent
*svc_info
;
3116 CHECK_STRING (service
);
3117 svc_info
= getservbyname (SSDATA (service
),
3118 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3120 error ("Unknown service: %s", SDATA (service
));
3121 port
= svc_info
->s_port
;
3124 memset (&address_in
, 0, sizeof address_in
);
3125 address_in
.sin_family
= family
;
3126 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3127 address_in
.sin_port
= port
;
3129 #ifndef HAVE_GETADDRINFO
3132 struct hostent
*host_info_ptr
;
3134 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3135 as it may `hang' Emacs for a very long time. */
3139 #ifdef HAVE_RES_INIT
3143 host_info_ptr
= gethostbyname (SDATA (host
));
3148 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3149 host_info_ptr
->h_length
);
3150 family
= host_info_ptr
->h_addrtype
;
3151 address_in
.sin_family
= family
;
3154 /* Attempt to interpret host as numeric inet address */
3156 unsigned long numeric_addr
;
3157 numeric_addr
= inet_addr (SSDATA (host
));
3158 if (numeric_addr
== -1)
3159 error ("Unknown host \"%s\"", SDATA (host
));
3161 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3162 sizeof (address_in
.sin_addr
));
3166 #endif /* not HAVE_GETADDRINFO */
3168 ai
.ai_family
= family
;
3169 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3170 ai
.ai_addrlen
= sizeof address_in
;
3174 /* Do this in case we never enter the for-loop below. */
3175 count1
= SPECPDL_INDEX ();
3178 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3187 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3194 #ifdef DATAGRAM_SOCKETS
3195 if (!is_server
&& socktype
== SOCK_DGRAM
)
3197 #endif /* DATAGRAM_SOCKETS */
3199 #ifdef NON_BLOCKING_CONNECT
3200 if (is_non_blocking_client
)
3203 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3205 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3217 /* Make us close S if quit. */
3218 record_unwind_protect (close_file_unwind
, make_number (s
));
3220 /* Parse network options in the arg list.
3221 We simply ignore anything which isn't a known option (including other keywords).
3222 An error is signaled if setting a known option fails. */
3223 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3224 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3228 /* Configure as a server socket. */
3230 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3231 explicit :reuseaddr key to override this. */
3232 #ifdef HAVE_LOCAL_SOCKETS
3233 if (family
!= AF_LOCAL
)
3235 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3238 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3239 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3242 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3243 report_file_error ("Cannot bind server socket", Qnil
);
3245 #ifdef HAVE_GETSOCKNAME
3246 if (EQ (service
, Qt
))
3248 struct sockaddr_in sa1
;
3249 socklen_t len1
= sizeof (sa1
);
3250 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3252 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3253 service
= make_number (ntohs (sa1
.sin_port
));
3254 contact
= Fplist_put (contact
, QCservice
, service
);
3259 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3260 report_file_error ("Cannot listen on server socket", Qnil
);
3268 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3271 if (ret
== 0 || xerrno
== EISCONN
)
3273 /* The unwind-protect will be discarded afterwards.
3274 Likewise for immediate_quit. */
3278 #ifdef NON_BLOCKING_CONNECT
3280 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3284 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3291 if (xerrno
== EINTR
)
3293 /* Unlike most other syscalls connect() cannot be called
3294 again. (That would return EALREADY.) The proper way to
3295 wait for completion is select(). */
3303 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3310 report_file_error ("select failed", Qnil
);
3314 len
= sizeof xerrno
;
3315 eassert (FD_ISSET (s
, &fdset
));
3316 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3317 report_file_error ("getsockopt failed", Qnil
);
3319 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3323 #endif /* !WINDOWSNT */
3327 /* Discard the unwind protect closing S. */
3328 specpdl_ptr
= specpdl
+ count1
;
3333 if (xerrno
== EINTR
)
3340 #ifdef DATAGRAM_SOCKETS
3341 if (socktype
== SOCK_DGRAM
)
3343 if (datagram_address
[s
].sa
)
3345 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3346 datagram_address
[s
].len
= lres
->ai_addrlen
;
3350 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3351 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3354 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3355 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3356 conv_lisp_to_sockaddr (rfamily
, remote
,
3357 datagram_address
[s
].sa
, rlen
);
3361 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3364 contact
= Fplist_put (contact
, QCaddress
,
3365 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3366 #ifdef HAVE_GETSOCKNAME
3369 struct sockaddr_in sa1
;
3370 socklen_t len1
= sizeof (sa1
);
3371 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3372 contact
= Fplist_put (contact
, QClocal
,
3373 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3380 #ifdef HAVE_GETADDRINFO
3389 /* Discard the unwind protect for closing S, if any. */
3390 specpdl_ptr
= specpdl
+ count1
;
3392 /* Unwind bind_polling_period and request_sigio. */
3393 unbind_to (count
, Qnil
);
3397 /* If non-blocking got this far - and failed - assume non-blocking is
3398 not supported after all. This is probably a wrong assumption, but
3399 the normal blocking calls to open-network-stream handles this error
3401 if (is_non_blocking_client
)
3406 report_file_error ("make server process failed", contact
);
3408 report_file_error ("make client process failed", contact
);
3415 buffer
= Fget_buffer_create (buffer
);
3416 proc
= make_process (name
);
3418 chan_process
[inch
] = proc
;
3421 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3424 fcntl (inch
, F_SETFL
, O_NDELAY
);
3428 p
= XPROCESS (proc
);
3430 p
->childp
= contact
;
3431 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3435 p
->sentinel
= sentinel
;
3437 p
->log
= Fplist_get (contact
, QClog
);
3438 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3439 p
->kill_without_query
= 1;
3440 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3445 if (is_server
&& socktype
!= SOCK_DGRAM
)
3446 p
->status
= Qlisten
;
3448 /* Make the process marker point into the process buffer (if any). */
3449 if (BUFFERP (buffer
))
3450 set_marker_both (p
->mark
, buffer
,
3451 BUF_ZV (XBUFFER (buffer
)),
3452 BUF_ZV_BYTE (XBUFFER (buffer
)));
3454 #ifdef NON_BLOCKING_CONNECT
3455 if (is_non_blocking_client
)
3457 /* We may get here if connect did succeed immediately. However,
3458 in that case, we still need to signal this like a non-blocking
3460 p
->status
= Qconnect
;
3461 if (!FD_ISSET (inch
, &connect_wait_mask
))
3463 FD_SET (inch
, &connect_wait_mask
);
3464 FD_SET (inch
, &write_mask
);
3465 num_pending_connects
++;
3470 /* A server may have a client filter setting of Qt, but it must
3471 still listen for incoming connects unless it is stopped. */
3472 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3473 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3475 FD_SET (inch
, &input_wait_mask
);
3476 FD_SET (inch
, &non_keyboard_wait_mask
);
3479 if (inch
> max_process_desc
)
3480 max_process_desc
= inch
;
3482 tem
= Fplist_member (contact
, QCcoding
);
3483 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3484 tem
= Qnil
; /* No error message (too late!). */
3487 /* Setup coding systems for communicating with the network stream. */
3488 struct gcpro gcpro1
;
3489 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3490 Lisp_Object coding_systems
= Qt
;
3491 Lisp_Object fargs
[5], val
;
3495 val
= XCAR (XCDR (tem
));
3499 else if (!NILP (Vcoding_system_for_read
))
3500 val
= Vcoding_system_for_read
;
3501 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3502 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3503 /* We dare not decode end-of-line format by setting VAL to
3504 Qraw_text, because the existing Emacs Lisp libraries
3505 assume that they receive bare code including a sequence of
3510 if (NILP (host
) || NILP (service
))
3511 coding_systems
= Qnil
;
3514 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3515 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3517 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3520 if (CONSP (coding_systems
))
3521 val
= XCAR (coding_systems
);
3522 else if (CONSP (Vdefault_process_coding_system
))
3523 val
= XCAR (Vdefault_process_coding_system
);
3527 p
->decode_coding_system
= val
;
3531 val
= XCAR (XCDR (tem
));
3535 else if (!NILP (Vcoding_system_for_write
))
3536 val
= Vcoding_system_for_write
;
3537 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3541 if (EQ (coding_systems
, Qt
))
3543 if (NILP (host
) || NILP (service
))
3544 coding_systems
= Qnil
;
3547 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3548 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3550 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3554 if (CONSP (coding_systems
))
3555 val
= XCDR (coding_systems
);
3556 else if (CONSP (Vdefault_process_coding_system
))
3557 val
= XCDR (Vdefault_process_coding_system
);
3561 p
->encode_coding_system
= val
;
3563 setup_process_coding_systems (proc
);
3565 p
->decoding_buf
= empty_unibyte_string
;
3566 p
->decoding_carryover
= 0;
3567 p
->encoding_buf
= empty_unibyte_string
;
3569 p
->inherit_coding_system_flag
3570 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3577 #if defined (HAVE_NET_IF_H)
3580 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3581 doc
: /* Return an alist of all network interfaces and their network address.
3582 Each element is a cons, the car of which is a string containing the
3583 interface name, and the cdr is the network address in internal
3584 format; see the description of ADDRESS in `make-network-process'. */)
3587 struct ifconf ifconf
;
3588 struct ifreq
*ifreq
;
3590 ptrdiff_t buf_size
= 512;
3594 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3600 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3601 ifconf
.ifc_buf
= buf
;
3602 ifconf
.ifc_len
= buf_size
;
3603 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3610 while (ifconf
.ifc_len
== buf_size
);
3615 ifreq
= ifconf
.ifc_req
;
3616 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3618 struct ifreq
*ifq
= ifreq
;
3619 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3620 #define SIZEOF_IFREQ(sif) \
3621 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3622 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3624 int len
= SIZEOF_IFREQ (ifq
);
3626 int len
= sizeof (*ifreq
);
3628 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3630 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3632 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3635 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3636 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3637 res
= Fcons (Fcons (build_string (namebuf
),
3638 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3639 sizeof (struct sockaddr
))),
3646 #endif /* SIOCGIFCONF */
3648 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3652 const char *flag_sym
;
3655 static const struct ifflag_def ifflag_table
[] = {
3659 #ifdef IFF_BROADCAST
3660 { IFF_BROADCAST
, "broadcast" },
3663 { IFF_DEBUG
, "debug" },
3666 { IFF_LOOPBACK
, "loopback" },
3668 #ifdef IFF_POINTOPOINT
3669 { IFF_POINTOPOINT
, "pointopoint" },
3672 { IFF_RUNNING
, "running" },
3675 { IFF_NOARP
, "noarp" },
3678 { IFF_PROMISC
, "promisc" },
3680 #ifdef IFF_NOTRAILERS
3681 #ifdef NS_IMPL_COCOA
3682 /* Really means smart, notrailers is obsolete */
3683 { IFF_NOTRAILERS
, "smart" },
3685 { IFF_NOTRAILERS
, "notrailers" },
3689 { IFF_ALLMULTI
, "allmulti" },
3692 { IFF_MASTER
, "master" },
3695 { IFF_SLAVE
, "slave" },
3697 #ifdef IFF_MULTICAST
3698 { IFF_MULTICAST
, "multicast" },
3701 { IFF_PORTSEL
, "portsel" },
3703 #ifdef IFF_AUTOMEDIA
3704 { IFF_AUTOMEDIA
, "automedia" },
3707 { IFF_DYNAMIC
, "dynamic" },
3710 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3713 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3716 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3719 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3722 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3727 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3728 doc
: /* Return information about network interface named IFNAME.
3729 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3730 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3731 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3732 FLAGS is the current flags of the interface. */)
3733 (Lisp_Object ifname
)
3736 Lisp_Object res
= Qnil
;
3740 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3741 && defined HAVE_GETIFADDRS && defined LLADDR)
3742 struct ifaddrs
*ifap
;
3745 CHECK_STRING (ifname
);
3747 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3748 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3750 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3755 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3756 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3758 int flags
= rq
.ifr_flags
;
3759 const struct ifflag_def
*fp
;
3762 /* If flags is smaller than int (i.e. short) it may have the high bit set
3763 due to IFF_MULTICAST. In that case, sign extending it into
3765 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3766 flags
= (unsigned short) rq
.ifr_flags
;
3769 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3771 if (flags
& fp
->flag_bit
)
3773 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3774 flags
-= fp
->flag_bit
;
3777 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3781 elt
= Fcons (make_number (fnum
), elt
);
3786 res
= Fcons (elt
, res
);
3789 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3790 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3792 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3793 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3797 for (n
= 0; n
< 6; n
++)
3798 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3799 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3801 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3802 if (getifaddrs (&ifap
) != -1)
3804 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3805 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3808 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3810 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3811 unsigned char linkaddr
[6];
3814 if (it
->ifa_addr
->sa_family
!= AF_LINK
3815 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3816 || sdl
->sdl_alen
!= 6)
3819 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3820 for (n
= 0; n
< 6; n
++)
3821 p
->contents
[n
] = make_number (linkaddr
[n
]);
3823 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3827 #ifdef HAVE_FREEIFADDRS
3831 #endif /* HAVE_GETIFADDRS && LLADDR */
3833 res
= Fcons (elt
, res
);
3836 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3837 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3840 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3841 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3843 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3847 res
= Fcons (elt
, res
);
3850 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3851 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3854 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3857 res
= Fcons (elt
, res
);
3860 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3861 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3864 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3867 res
= Fcons (elt
, res
);
3871 return any
? res
: Qnil
;
3874 #endif /* defined (HAVE_NET_IF_H) */
3876 /* Turn off input and output for process PROC. */
3879 deactivate_process (Lisp_Object proc
)
3881 register int inchannel
, outchannel
;
3882 register struct Lisp_Process
*p
= XPROCESS (proc
);
3885 /* Delete GnuTLS structures in PROC, if any. */
3886 emacs_gnutls_deinit (proc
);
3887 #endif /* HAVE_GNUTLS */
3889 inchannel
= p
->infd
;
3890 outchannel
= p
->outfd
;
3892 #ifdef ADAPTIVE_READ_BUFFERING
3893 if (p
->read_output_delay
> 0)
3895 if (--process_output_delay_count
< 0)
3896 process_output_delay_count
= 0;
3897 p
->read_output_delay
= 0;
3898 p
->read_output_skip
= 0;
3904 /* Beware SIGCHLD hereabouts. */
3905 flush_pending_output (inchannel
);
3906 emacs_close (inchannel
);
3907 if (outchannel
>= 0 && outchannel
!= inchannel
)
3908 emacs_close (outchannel
);
3912 #ifdef DATAGRAM_SOCKETS
3913 if (DATAGRAM_CHAN_P (inchannel
))
3915 xfree (datagram_address
[inchannel
].sa
);
3916 datagram_address
[inchannel
].sa
= 0;
3917 datagram_address
[inchannel
].len
= 0;
3920 chan_process
[inchannel
] = Qnil
;
3921 FD_CLR (inchannel
, &input_wait_mask
);
3922 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3923 #ifdef NON_BLOCKING_CONNECT
3924 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3926 FD_CLR (inchannel
, &connect_wait_mask
);
3927 FD_CLR (inchannel
, &write_mask
);
3928 if (--num_pending_connects
< 0)
3932 if (inchannel
== max_process_desc
)
3935 /* We just closed the highest-numbered process input descriptor,
3936 so recompute the highest-numbered one now. */
3937 max_process_desc
= 0;
3938 for (i
= 0; i
< MAXDESC
; i
++)
3939 if (!NILP (chan_process
[i
]))
3940 max_process_desc
= i
;
3946 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3948 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3949 It is read into the process' buffers or given to their filter functions.
3950 Non-nil arg PROCESS means do not return until some output has been received
3953 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3954 and milliseconds to wait; return after that much time whether or not
3955 there is any subprocess output. If SECONDS is a floating point number,
3956 it specifies a fractional number of seconds to wait.
3957 The MILLISEC argument is obsolete and should be avoided.
3959 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3960 from PROCESS, suspending reading output from other processes.
3961 If JUST-THIS-ONE is an integer, don't run any timers either.
3962 Return non-nil if we received any output before the timeout expired. */)
3963 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3965 int secs
, usecs
= 0;
3967 if (! NILP (process
))
3968 CHECK_PROCESS (process
);
3970 just_this_one
= Qnil
;
3972 if (!NILP (millisec
))
3973 { /* Obsolete calling convention using integers rather than floats. */
3974 CHECK_NUMBER (millisec
);
3976 seconds
= make_float (XINT (millisec
) / 1000.0);
3979 CHECK_NUMBER (seconds
);
3980 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3984 if (!NILP (seconds
))
3986 if (INTEGERP (seconds
))
3987 secs
= XINT (seconds
);
3988 else if (FLOATP (seconds
))
3990 double timeout
= XFLOAT_DATA (seconds
);
3991 secs
= (int) timeout
;
3992 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3995 wrong_type_argument (Qnumberp
, seconds
);
3997 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3998 secs
= -1, usecs
= 0;
4001 secs
= NILP (process
) ? -1 : 0;
4004 (wait_reading_process_output (secs
, usecs
, 0, 0,
4006 !NILP (process
) ? XPROCESS (process
) : NULL
,
4007 NILP (just_this_one
) ? 0 :
4008 !INTEGERP (just_this_one
) ? 1 : -1)
4012 /* Accept a connection for server process SERVER on CHANNEL. */
4014 static int connect_counter
= 0;
4017 server_accept_connection (Lisp_Object server
, int channel
)
4019 Lisp_Object proc
, caller
, name
, buffer
;
4020 Lisp_Object contact
, host
, service
;
4021 struct Lisp_Process
*ps
= XPROCESS (server
);
4022 struct Lisp_Process
*p
;
4026 struct sockaddr_in in
;
4028 struct sockaddr_in6 in6
;
4030 #ifdef HAVE_LOCAL_SOCKETS
4031 struct sockaddr_un un
;
4034 socklen_t len
= sizeof saddr
;
4036 s
= accept (channel
, &saddr
.sa
, &len
);
4045 if (code
== EWOULDBLOCK
)
4049 if (!NILP (ps
->log
))
4050 call3 (ps
->log
, server
, Qnil
,
4051 concat3 (build_string ("accept failed with code"),
4052 Fnumber_to_string (make_number (code
)),
4053 build_string ("\n")));
4059 /* Setup a new process to handle the connection. */
4061 /* Generate a unique identification of the caller, and build contact
4062 information for this process. */
4065 switch (saddr
.sa
.sa_family
)
4069 Lisp_Object args
[5];
4070 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4071 args
[0] = build_string ("%d.%d.%d.%d");
4072 args
[1] = make_number (*ip
++);
4073 args
[2] = make_number (*ip
++);
4074 args
[3] = make_number (*ip
++);
4075 args
[4] = make_number (*ip
++);
4076 host
= Fformat (5, args
);
4077 service
= make_number (ntohs (saddr
.in
.sin_port
));
4079 args
[0] = build_string (" <%s:%d>");
4082 caller
= Fformat (3, args
);
4089 Lisp_Object args
[9];
4090 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4092 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4093 for (i
= 0; i
< 8; i
++)
4094 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4095 host
= Fformat (9, args
);
4096 service
= make_number (ntohs (saddr
.in
.sin_port
));
4098 args
[0] = build_string (" <[%s]:%d>");
4101 caller
= Fformat (3, args
);
4106 #ifdef HAVE_LOCAL_SOCKETS
4110 caller
= Fnumber_to_string (make_number (connect_counter
));
4111 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4115 /* Create a new buffer name for this process if it doesn't have a
4116 filter. The new buffer name is based on the buffer name or
4117 process name of the server process concatenated with the caller
4120 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4124 buffer
= ps
->buffer
;
4126 buffer
= Fbuffer_name (buffer
);
4131 buffer
= concat2 (buffer
, caller
);
4132 buffer
= Fget_buffer_create (buffer
);
4136 /* Generate a unique name for the new server process. Combine the
4137 server process name with the caller identification. */
4139 name
= concat2 (ps
->name
, caller
);
4140 proc
= make_process (name
);
4142 chan_process
[s
] = proc
;
4145 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4148 fcntl (s
, F_SETFL
, O_NDELAY
);
4152 p
= XPROCESS (proc
);
4154 /* Build new contact information for this setup. */
4155 contact
= Fcopy_sequence (ps
->childp
);
4156 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4157 contact
= Fplist_put (contact
, QChost
, host
);
4158 if (!NILP (service
))
4159 contact
= Fplist_put (contact
, QCservice
, service
);
4160 contact
= Fplist_put (contact
, QCremote
,
4161 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4162 #ifdef HAVE_GETSOCKNAME
4164 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4165 contact
= Fplist_put (contact
, QClocal
,
4166 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4169 p
->childp
= contact
;
4170 p
->plist
= Fcopy_sequence (ps
->plist
);
4174 p
->sentinel
= ps
->sentinel
;
4175 p
->filter
= ps
->filter
;
4182 /* Client processes for accepted connections are not stopped initially. */
4183 if (!EQ (p
->filter
, Qt
))
4185 FD_SET (s
, &input_wait_mask
);
4186 FD_SET (s
, &non_keyboard_wait_mask
);
4189 if (s
> max_process_desc
)
4190 max_process_desc
= s
;
4192 /* Setup coding system for new process based on server process.
4193 This seems to be the proper thing to do, as the coding system
4194 of the new process should reflect the settings at the time the
4195 server socket was opened; not the current settings. */
4197 p
->decode_coding_system
= ps
->decode_coding_system
;
4198 p
->encode_coding_system
= ps
->encode_coding_system
;
4199 setup_process_coding_systems (proc
);
4201 p
->decoding_buf
= empty_unibyte_string
;
4202 p
->decoding_carryover
= 0;
4203 p
->encoding_buf
= empty_unibyte_string
;
4205 p
->inherit_coding_system_flag
4206 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4208 if (!NILP (ps
->log
))
4209 call3 (ps
->log
, server
, proc
,
4210 concat3 (build_string ("accept from "),
4211 (STRINGP (host
) ? host
: build_string ("-")),
4212 build_string ("\n")));
4214 if (!NILP (p
->sentinel
))
4215 exec_sentinel (proc
,
4216 concat3 (build_string ("open from "),
4217 (STRINGP (host
) ? host
: build_string ("-")),
4218 build_string ("\n")));
4221 /* This variable is different from waiting_for_input in keyboard.c.
4222 It is used to communicate to a lisp process-filter/sentinel (via the
4223 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4224 for user-input when that process-filter was called.
4225 waiting_for_input cannot be used as that is by definition 0 when
4226 lisp code is being evalled.
4227 This is also used in record_asynch_buffer_change.
4228 For that purpose, this must be 0
4229 when not inside wait_reading_process_output. */
4230 static int waiting_for_user_input_p
;
4233 wait_reading_process_output_unwind (Lisp_Object data
)
4235 waiting_for_user_input_p
= XINT (data
);
4239 /* This is here so breakpoints can be put on it. */
4241 wait_reading_process_output_1 (void)
4245 /* Use a wrapper around select to work around a bug in gdb 5.3.
4246 Normally, the wrapper is optimized away by inlining.
4248 If emacs is stopped inside select, the gdb backtrace doesn't
4249 show the function which called select, so it is practically
4250 impossible to step through wait_reading_process_output. */
4254 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4256 return select (n
, rfd
, wfd
, xfd
, tmo
);
4258 #define select select_wrapper
4261 /* Read and dispose of subprocess output while waiting for timeout to
4262 elapse and/or keyboard input to be available.
4265 timeout in seconds, or
4266 zero for no limit, or
4267 -1 means gobble data immediately available but don't wait for any.
4270 an additional duration to wait, measured in microseconds.
4271 If this is nonzero and time_limit is 0, then the timeout
4272 consists of MICROSECS only.
4274 READ_KBD is a lisp value:
4275 0 to ignore keyboard input, or
4276 1 to return when input is available, or
4277 -1 meaning caller will actually read the input, so don't throw to
4278 the quit handler, or
4280 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4281 output that arrives.
4283 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4284 (and gobble terminal input into the buffer if any arrives).
4286 If WAIT_PROC is specified, wait until something arrives from that
4287 process. The return value is true if we read some input from
4290 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4291 (suspending output from other processes). A negative value
4292 means don't run any timers either.
4294 If WAIT_PROC is specified, then the function returns true if we
4295 received input from that process before the timeout elapsed.
4296 Otherwise, return true if we received input from any process. */
4299 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4301 Lisp_Object wait_for_cell
,
4302 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4304 register int channel
, nfds
;
4305 SELECT_TYPE Available
;
4306 SELECT_TYPE Writeok
;
4308 int check_delay
, no_avail
;
4311 EMACS_TIME timeout
, end_time
;
4312 int wait_channel
= -1;
4313 int got_some_input
= 0;
4314 int count
= SPECPDL_INDEX ();
4316 FD_ZERO (&Available
);
4319 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4320 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4321 message ("Blocking call to accept-process-output with quit inhibited!!");
4323 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4324 if (wait_proc
!= NULL
)
4325 wait_channel
= wait_proc
->infd
;
4327 record_unwind_protect (wait_reading_process_output_unwind
,
4328 make_number (waiting_for_user_input_p
));
4329 waiting_for_user_input_p
= read_kbd
;
4331 /* Since we may need to wait several times,
4332 compute the absolute time to return at. */
4333 if (time_limit
|| microsecs
)
4335 EMACS_GET_TIME (end_time
);
4336 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4337 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4342 int timeout_reduced_for_timers
= 0;
4344 /* If calling from keyboard input, do not quit
4345 since we want to return C-g as an input character.
4346 Otherwise, do pending quit if requested. */
4351 process_pending_signals ();
4354 /* Exit now if the cell we're waiting for became non-nil. */
4355 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4358 /* Compute time from now till when time limit is up */
4359 /* Exit if already run out */
4360 if (time_limit
== -1)
4362 /* -1 specified for timeout means
4363 gobble output available now
4364 but don't wait at all. */
4366 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4368 else if (time_limit
|| microsecs
)
4370 EMACS_GET_TIME (timeout
);
4371 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4372 if (EMACS_TIME_NEG_P (timeout
))
4377 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4380 /* Normally we run timers here.
4381 But not if wait_for_cell; in those cases,
4382 the wait is supposed to be short,
4383 and those callers cannot handle running arbitrary Lisp code here. */
4384 if (NILP (wait_for_cell
)
4385 && just_wait_proc
>= 0)
4387 EMACS_TIME timer_delay
;
4391 int old_timers_run
= timers_run
;
4392 struct buffer
*old_buffer
= current_buffer
;
4393 Lisp_Object old_window
= selected_window
;
4395 timer_delay
= timer_check ();
4397 /* If a timer has run, this might have changed buffers
4398 an alike. Make read_key_sequence aware of that. */
4399 if (timers_run
!= old_timers_run
4400 && (old_buffer
!= current_buffer
4401 || !EQ (old_window
, selected_window
))
4402 && waiting_for_user_input_p
== -1)
4403 record_asynch_buffer_change ();
4405 if (timers_run
!= old_timers_run
&& do_display
)
4406 /* We must retry, since a timer may have requeued itself
4407 and that could alter the time_delay. */
4408 redisplay_preserve_echo_area (9);
4412 while (!detect_input_pending ());
4414 /* If there is unread keyboard input, also return. */
4416 && requeued_events_pending_p ())
4419 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4421 EMACS_TIME difference
;
4422 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4423 if (EMACS_TIME_NEG_P (difference
))
4425 timeout
= timer_delay
;
4426 timeout_reduced_for_timers
= 1;
4429 /* If time_limit is -1, we are not going to wait at all. */
4430 else if (time_limit
!= -1)
4432 /* This is so a breakpoint can be put here. */
4433 wait_reading_process_output_1 ();
4437 /* Cause C-g and alarm signals to take immediate action,
4438 and cause input available signals to zero out timeout.
4440 It is important that we do this before checking for process
4441 activity. If we get a SIGCHLD after the explicit checks for
4442 process activity, timeout is the only way we will know. */
4444 set_waiting_for_input (&timeout
);
4446 /* If status of something has changed, and no input is
4447 available, notify the user of the change right away. After
4448 this explicit check, we'll let the SIGCHLD handler zap
4449 timeout to get our attention. */
4450 if (update_tick
!= process_tick
)
4455 if (kbd_on_hold_p ())
4458 Atemp
= input_wait_mask
;
4461 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4462 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4464 #ifdef NON_BLOCKING_CONNECT
4465 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4469 (SELECT_TYPE
*)0, &timeout
)
4472 /* It's okay for us to do this and then continue with
4473 the loop, since timeout has already been zeroed out. */
4474 clear_waiting_for_input ();
4475 status_notify (NULL
);
4476 if (do_display
) redisplay_preserve_echo_area (13);
4480 /* Don't wait for output from a non-running process. Just
4481 read whatever data has already been received. */
4482 if (wait_proc
&& wait_proc
->raw_status_new
)
4483 update_status (wait_proc
);
4485 && ! EQ (wait_proc
->status
, Qrun
)
4486 && ! EQ (wait_proc
->status
, Qconnect
))
4488 int nread
, total_nread
= 0;
4490 clear_waiting_for_input ();
4491 XSETPROCESS (proc
, wait_proc
);
4493 /* Read data from the process, until we exhaust it. */
4494 while (wait_proc
->infd
>= 0)
4496 nread
= read_process_output (proc
, wait_proc
->infd
);
4503 total_nread
+= nread
;
4507 else if (nread
== -1 && EIO
== errno
)
4511 else if (nread
== -1 && EAGAIN
== errno
)
4515 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4519 if (total_nread
> 0 && do_display
)
4520 redisplay_preserve_echo_area (10);
4525 /* Wait till there is something to do */
4527 if (wait_proc
&& just_wait_proc
)
4529 if (wait_proc
->infd
< 0) /* Terminated */
4531 FD_SET (wait_proc
->infd
, &Available
);
4535 else if (!NILP (wait_for_cell
))
4537 Available
= non_process_wait_mask
;
4544 Available
= non_keyboard_wait_mask
;
4546 Available
= input_wait_mask
;
4547 Writeok
= write_mask
;
4548 #ifdef SELECT_CANT_DO_WRITE_MASK
4553 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4556 /* If frame size has changed or the window is newly mapped,
4557 redisplay now, before we start to wait. There is a race
4558 condition here; if a SIGIO arrives between now and the select
4559 and indicates that a frame is trashed, the select may block
4560 displaying a trashed screen. */
4561 if (frame_garbaged
&& do_display
)
4563 clear_waiting_for_input ();
4564 redisplay_preserve_echo_area (11);
4566 set_waiting_for_input (&timeout
);
4569 /* Skip the `select' call if input is available and we're
4570 waiting for keyboard input or a cell change (which can be
4571 triggered by processing X events). In the latter case, set
4572 nfds to 1 to avoid breaking the loop. */
4574 if ((read_kbd
|| !NILP (wait_for_cell
))
4575 && detect_input_pending ())
4577 nfds
= read_kbd
? 0 : 1;
4584 #ifdef ADAPTIVE_READ_BUFFERING
4585 /* Set the timeout for adaptive read buffering if any
4586 process has non-zero read_output_skip and non-zero
4587 read_output_delay, and we are not reading output for a
4588 specific wait_channel. It is not executed if
4589 Vprocess_adaptive_read_buffering is nil. */
4590 if (process_output_skip
&& check_delay
> 0)
4592 int usecs
= EMACS_USECS (timeout
);
4593 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4594 usecs
= READ_OUTPUT_DELAY_MAX
;
4595 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4597 proc
= chan_process
[channel
];
4600 /* Find minimum non-zero read_output_delay among the
4601 processes with non-zero read_output_skip. */
4602 if (XPROCESS (proc
)->read_output_delay
> 0)
4605 if (!XPROCESS (proc
)->read_output_skip
)
4607 FD_CLR (channel
, &Available
);
4608 XPROCESS (proc
)->read_output_skip
= 0;
4609 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4610 usecs
= XPROCESS (proc
)->read_output_delay
;
4613 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4614 process_output_skip
= 0;
4617 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4619 #elif defined (HAVE_NS)
4624 (max (max_process_desc
, max_input_desc
) + 1,
4626 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4627 (SELECT_TYPE
*)0, &timeout
);
4630 /* GnuTLS buffers data internally. In lowat mode it leaves
4631 some data in the TCP buffers so that select works, but
4632 with custom pull/push functions we need to check if some
4633 data is available in the buffers manually. */
4638 /* We're not waiting on a specific process, so loop
4639 through all the channels and check for data.
4640 This is a workaround needed for some versions of
4641 the gnutls library -- 2.12.14 has been confirmed
4643 http://comments.gmane.org/gmane.emacs.devel/145074 */
4644 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4645 if (! NILP (chan_process
[channel
]))
4647 struct Lisp_Process
*p
=
4648 XPROCESS (chan_process
[channel
]);
4649 if (p
&& p
->gnutls_p
&& p
->infd
4650 && ((emacs_gnutls_record_check_pending
4655 FD_SET (p
->infd
, &Available
);
4661 /* Check this specific channel. */
4662 if (wait_proc
->gnutls_p
/* Check for valid process. */
4663 /* Do we have pending data? */
4664 && ((emacs_gnutls_record_check_pending
4665 (wait_proc
->gnutls_state
))
4669 /* Set to Available. */
4670 FD_SET (wait_proc
->infd
, &Available
);
4679 /* Make C-g and alarm signals set flags again */
4680 clear_waiting_for_input ();
4682 /* If we woke up due to SIGWINCH, actually change size now. */
4683 do_pending_window_change (0);
4685 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4686 /* We wanted the full specified time, so return now. */
4690 if (xerrno
== EINTR
)
4692 else if (xerrno
== EBADF
)
4695 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4696 the child's closure of the pts gives the parent a SIGHUP, and
4697 the ptc file descriptor is automatically closed,
4698 yielding EBADF here or at select() call above.
4699 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4700 in m/ibmrt-aix.h), and here we just ignore the select error.
4701 Cleanup occurs c/o status_notify after SIGCLD. */
4702 no_avail
= 1; /* Cannot depend on values returned */
4708 error ("select error: %s", emacs_strerror (xerrno
));
4713 FD_ZERO (&Available
);
4717 #if 0 /* When polling is used, interrupt_input is 0,
4718 so get_input_pending should read the input.
4719 So this should not be needed. */
4720 /* If we are using polling for input,
4721 and we see input available, make it get read now.
4722 Otherwise it might not actually get read for a second.
4723 And on hpux, since we turn off polling in wait_reading_process_output,
4724 it might never get read at all if we don't spend much time
4725 outside of wait_reading_process_output. */
4726 if (read_kbd
&& interrupt_input
4727 && keyboard_bit_set (&Available
)
4728 && input_polling_used ())
4729 kill (getpid (), SIGALRM
);
4732 /* Check for keyboard input */
4733 /* If there is any, return immediately
4734 to give it higher priority than subprocesses */
4738 int old_timers_run
= timers_run
;
4739 struct buffer
*old_buffer
= current_buffer
;
4740 Lisp_Object old_window
= selected_window
;
4743 if (detect_input_pending_run_timers (do_display
))
4745 swallow_events (do_display
);
4746 if (detect_input_pending_run_timers (do_display
))
4750 /* If a timer has run, this might have changed buffers
4751 an alike. Make read_key_sequence aware of that. */
4752 if (timers_run
!= old_timers_run
4753 && waiting_for_user_input_p
== -1
4754 && (old_buffer
!= current_buffer
4755 || !EQ (old_window
, selected_window
)))
4756 record_asynch_buffer_change ();
4762 /* If there is unread keyboard input, also return. */
4764 && requeued_events_pending_p ())
4767 /* If we are not checking for keyboard input now,
4768 do process events (but don't run any timers).
4769 This is so that X events will be processed.
4770 Otherwise they may have to wait until polling takes place.
4771 That would causes delays in pasting selections, for example.
4773 (We used to do this only if wait_for_cell.) */
4774 if (read_kbd
== 0 && detect_input_pending ())
4776 swallow_events (do_display
);
4777 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4778 if (detect_input_pending ())
4783 /* Exit now if the cell we're waiting for became non-nil. */
4784 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4788 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4789 go read it. This can happen with X on BSD after logging out.
4790 In that case, there really is no input and no SIGIO,
4791 but select says there is input. */
4793 if (read_kbd
&& interrupt_input
4794 && keyboard_bit_set (&Available
) && ! noninteractive
)
4795 kill (getpid (), SIGIO
);
4799 got_some_input
|= nfds
> 0;
4801 /* If checking input just got us a size-change event from X,
4802 obey it now if we should. */
4803 if (read_kbd
|| ! NILP (wait_for_cell
))
4804 do_pending_window_change (0);
4806 /* Check for data from a process. */
4807 if (no_avail
|| nfds
== 0)
4810 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4812 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4813 if (FD_ISSET (channel
, &Available
)
4815 && (d
->condition
& FOR_READ
) != 0)
4816 d
->func (channel
, d
->data
, 1);
4817 if (FD_ISSET (channel
, &write_mask
)
4819 && (d
->condition
& FOR_WRITE
) != 0)
4820 d
->func (channel
, d
->data
, 0);
4823 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4825 if (FD_ISSET (channel
, &Available
)
4826 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4827 && !FD_ISSET (channel
, &non_process_wait_mask
))
4831 /* If waiting for this channel, arrange to return as
4832 soon as no more input to be processed. No more
4834 if (wait_channel
== channel
)
4840 proc
= chan_process
[channel
];
4844 /* If this is a server stream socket, accept connection. */
4845 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4847 server_accept_connection (proc
, channel
);
4851 /* Read data from the process, starting with our
4852 buffered-ahead character if we have one. */
4854 nread
= read_process_output (proc
, channel
);
4857 /* Since read_process_output can run a filter,
4858 which can call accept-process-output,
4859 don't try to read from any other processes
4860 before doing the select again. */
4861 FD_ZERO (&Available
);
4864 redisplay_preserve_echo_area (12);
4867 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4870 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4871 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4873 else if (nread
== -1 && errno
== EAGAIN
)
4877 else if (nread
== -1 && errno
== EAGAIN
)
4879 /* Note that we cannot distinguish between no input
4880 available now and a closed pipe.
4881 With luck, a closed pipe will be accompanied by
4882 subprocess termination and SIGCHLD. */
4883 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4885 #endif /* O_NDELAY */
4886 #endif /* O_NONBLOCK */
4888 /* On some OSs with ptys, when the process on one end of
4889 a pty exits, the other end gets an error reading with
4890 errno = EIO instead of getting an EOF (0 bytes read).
4891 Therefore, if we get an error reading and errno =
4892 EIO, just continue, because the child process has
4893 exited and should clean itself up soon (e.g. when we
4896 However, it has been known to happen that the SIGCHLD
4897 got lost. So raise the signal again just in case.
4899 else if (nread
== -1 && errno
== EIO
)
4901 /* Don't do anything if only a pty, with no associated
4902 process (bug#10933). */
4903 if (XPROCESS (proc
)->pid
!= -2) {
4904 /* Clear the descriptor now, so we only raise the signal
4906 FD_CLR (channel
, &input_wait_mask
);
4907 FD_CLR (channel
, &non_keyboard_wait_mask
);
4909 kill (getpid (), SIGCHLD
);
4912 #endif /* HAVE_PTYS */
4913 /* If we can detect process termination, don't consider the
4914 process gone just because its pipe is closed. */
4916 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4921 /* Preserve status of processes already terminated. */
4922 XPROCESS (proc
)->tick
= ++process_tick
;
4923 deactivate_process (proc
);
4924 if (XPROCESS (proc
)->raw_status_new
)
4925 update_status (XPROCESS (proc
));
4926 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4927 XPROCESS (proc
)->status
4928 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4931 #ifdef NON_BLOCKING_CONNECT
4932 if (FD_ISSET (channel
, &Writeok
)
4933 && FD_ISSET (channel
, &connect_wait_mask
))
4935 struct Lisp_Process
*p
;
4937 FD_CLR (channel
, &connect_wait_mask
);
4938 FD_CLR (channel
, &write_mask
);
4939 if (--num_pending_connects
< 0)
4942 proc
= chan_process
[channel
];
4946 p
= XPROCESS (proc
);
4949 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4950 So only use it on systems where it is known to work. */
4952 socklen_t xlen
= sizeof (xerrno
);
4953 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4958 struct sockaddr pname
;
4959 int pnamelen
= sizeof (pname
);
4961 /* If connection failed, getpeername will fail. */
4963 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4965 /* Obtain connect failure code through error slippage. */
4968 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4975 p
->tick
= ++process_tick
;
4976 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4977 deactivate_process (proc
);
4982 /* Execute the sentinel here. If we had relied on
4983 status_notify to do it later, it will read input
4984 from the process before calling the sentinel. */
4985 exec_sentinel (proc
, build_string ("open\n"));
4986 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4988 FD_SET (p
->infd
, &input_wait_mask
);
4989 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4993 #endif /* NON_BLOCKING_CONNECT */
4994 } /* end for each file descriptor */
4995 } /* end while exit conditions not met */
4997 unbind_to (count
, Qnil
);
4999 /* If calling from keyboard input, do not quit
5000 since we want to return C-g as an input character.
5001 Otherwise, do pending quit if requested. */
5004 /* Prevent input_pending from remaining set if we quit. */
5005 clear_input_pending ();
5009 return got_some_input
;
5012 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5015 read_process_output_call (Lisp_Object fun_and_args
)
5017 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5021 read_process_output_error_handler (Lisp_Object error_val
)
5023 cmd_error_internal (error_val
, "error in process filter: ");
5025 update_echo_area ();
5026 Fsleep_for (make_number (2), Qnil
);
5030 /* Read pending output from the process channel,
5031 starting with our buffered-ahead character if we have one.
5032 Yield number of decoded characters read.
5034 This function reads at most 4096 characters.
5035 If you want to read all available subprocess output,
5036 you must call it repeatedly until it returns zero.
5038 The characters read are decoded according to PROC's coding-system
5042 read_process_output (Lisp_Object proc
, register int channel
)
5044 register ssize_t nbytes
;
5046 register Lisp_Object outstream
;
5047 register struct Lisp_Process
*p
= XPROCESS (proc
);
5048 register EMACS_INT opoint
;
5049 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5050 int carryover
= p
->decoding_carryover
;
5052 int count
= SPECPDL_INDEX ();
5053 Lisp_Object odeactivate
;
5055 chars
= (char *) alloca (carryover
+ readmax
);
5057 /* See the comment above. */
5058 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5060 #ifdef DATAGRAM_SOCKETS
5061 /* We have a working select, so proc_buffered_char is always -1. */
5062 if (DATAGRAM_CHAN_P (channel
))
5064 socklen_t len
= datagram_address
[channel
].len
;
5065 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5066 0, datagram_address
[channel
].sa
, &len
);
5071 int buffered
= 0 <= proc_buffered_char
[channel
];
5074 chars
[carryover
] = proc_buffered_char
[channel
];
5075 proc_buffered_char
[channel
] = -1;
5079 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5080 readmax
- buffered
);
5083 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5084 readmax
- buffered
);
5085 #ifdef ADAPTIVE_READ_BUFFERING
5086 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5088 int delay
= p
->read_output_delay
;
5091 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5094 process_output_delay_count
++;
5095 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5098 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5100 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5102 process_output_delay_count
--;
5104 p
->read_output_delay
= delay
;
5107 p
->read_output_skip
= 1;
5108 process_output_skip
= 1;
5113 nbytes
+= buffered
&& nbytes
<= 0;
5116 p
->decoding_carryover
= 0;
5118 /* At this point, NBYTES holds number of bytes just received
5119 (including the one in proc_buffered_char[channel]). */
5122 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5124 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5127 /* Now set NBYTES how many bytes we must decode. */
5128 nbytes
+= carryover
;
5130 odeactivate
= Vdeactivate_mark
;
5131 /* There's no good reason to let process filters change the current
5132 buffer, and many callers of accept-process-output, sit-for, and
5133 friends don't expect current-buffer to be changed from under them. */
5134 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5136 /* Read and dispose of the process output. */
5137 outstream
= p
->filter
;
5138 if (!NILP (outstream
))
5141 int outer_running_asynch_code
= running_asynch_code
;
5142 int waiting
= waiting_for_user_input_p
;
5144 /* No need to gcpro these, because all we do with them later
5145 is test them for EQness, and none of them should be a string. */
5147 Lisp_Object obuffer
, okeymap
;
5148 XSETBUFFER (obuffer
, current_buffer
);
5149 okeymap
= BVAR (current_buffer
, keymap
);
5152 /* We inhibit quit here instead of just catching it so that
5153 hitting ^G when a filter happens to be running won't screw
5155 specbind (Qinhibit_quit
, Qt
);
5156 specbind (Qlast_nonmenu_event
, Qt
);
5158 /* In case we get recursively called,
5159 and we already saved the match data nonrecursively,
5160 save the same match data in safely recursive fashion. */
5161 if (outer_running_asynch_code
)
5164 /* Don't clobber the CURRENT match data, either! */
5165 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5166 restore_search_regs ();
5167 record_unwind_save_match_data ();
5168 Fset_match_data (tem
, Qt
);
5171 /* For speed, if a search happens within this code,
5172 save the match data in a special nonrecursive fashion. */
5173 running_asynch_code
= 1;
5175 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5176 text
= coding
->dst_object
;
5177 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5178 /* A new coding system might be found. */
5179 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5181 p
->decode_coding_system
= Vlast_coding_system_used
;
5183 /* Don't call setup_coding_system for
5184 proc_decode_coding_system[channel] here. It is done in
5185 detect_coding called via decode_coding above. */
5187 /* If a coding system for encoding is not yet decided, we set
5188 it as the same as coding-system for decoding.
5190 But, before doing that we must check if
5191 proc_encode_coding_system[p->outfd] surely points to a
5192 valid memory because p->outfd will be changed once EOF is
5193 sent to the process. */
5194 if (NILP (p
->encode_coding_system
)
5195 && proc_encode_coding_system
[p
->outfd
])
5197 p
->encode_coding_system
5198 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5199 setup_coding_system (p
->encode_coding_system
,
5200 proc_encode_coding_system
[p
->outfd
]);
5204 if (coding
->carryover_bytes
> 0)
5206 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5207 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5208 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5209 coding
->carryover_bytes
);
5210 p
->decoding_carryover
= coding
->carryover_bytes
;
5212 if (SBYTES (text
) > 0)
5213 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5214 sometimes it's simply wrong to wrap (e.g. when called from
5215 accept-process-output). */
5216 internal_condition_case_1 (read_process_output_call
,
5218 Fcons (proc
, Fcons (text
, Qnil
))),
5219 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5220 read_process_output_error_handler
);
5222 /* If we saved the match data nonrecursively, restore it now. */
5223 restore_search_regs ();
5224 running_asynch_code
= outer_running_asynch_code
;
5226 /* Restore waiting_for_user_input_p as it was
5227 when we were called, in case the filter clobbered it. */
5228 waiting_for_user_input_p
= waiting
;
5230 #if 0 /* Call record_asynch_buffer_change unconditionally,
5231 because we might have changed minor modes or other things
5232 that affect key bindings. */
5233 if (! EQ (Fcurrent_buffer (), obuffer
)
5234 || ! EQ (current_buffer
->keymap
, okeymap
))
5236 /* But do it only if the caller is actually going to read events.
5237 Otherwise there's no need to make him wake up, and it could
5238 cause trouble (for example it would make sit_for return). */
5239 if (waiting_for_user_input_p
== -1)
5240 record_asynch_buffer_change ();
5243 /* If no filter, write into buffer if it isn't dead. */
5244 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5246 Lisp_Object old_read_only
;
5247 EMACS_INT old_begv
, old_zv
;
5248 EMACS_INT old_begv_byte
, old_zv_byte
;
5249 EMACS_INT before
, before_byte
;
5250 EMACS_INT opoint_byte
;
5254 Fset_buffer (p
->buffer
);
5256 opoint_byte
= PT_BYTE
;
5257 old_read_only
= BVAR (current_buffer
, read_only
);
5260 old_begv_byte
= BEGV_BYTE
;
5261 old_zv_byte
= ZV_BYTE
;
5263 BVAR (current_buffer
, read_only
) = Qnil
;
5265 /* Insert new output into buffer
5266 at the current end-of-output marker,
5267 thus preserving logical ordering of input and output. */
5268 if (XMARKER (p
->mark
)->buffer
)
5269 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5270 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5273 SET_PT_BOTH (ZV
, ZV_BYTE
);
5275 before_byte
= PT_BYTE
;
5277 /* If the output marker is outside of the visible region, save
5278 the restriction and widen. */
5279 if (! (BEGV
<= PT
&& PT
<= ZV
))
5282 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5283 text
= coding
->dst_object
;
5284 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5285 /* A new coding system might be found. See the comment in the
5286 similar code in the previous `if' block. */
5287 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5289 p
->decode_coding_system
= Vlast_coding_system_used
;
5290 if (NILP (p
->encode_coding_system
)
5291 && proc_encode_coding_system
[p
->outfd
])
5293 p
->encode_coding_system
5294 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5295 setup_coding_system (p
->encode_coding_system
,
5296 proc_encode_coding_system
[p
->outfd
]);
5299 if (coding
->carryover_bytes
> 0)
5301 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5302 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5303 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5304 coding
->carryover_bytes
);
5305 p
->decoding_carryover
= coding
->carryover_bytes
;
5307 /* Adjust the multibyteness of TEXT to that of the buffer. */
5308 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5309 != ! STRING_MULTIBYTE (text
))
5310 text
= (STRING_MULTIBYTE (text
)
5311 ? Fstring_as_unibyte (text
)
5312 : Fstring_to_multibyte (text
));
5313 /* Insert before markers in case we are inserting where
5314 the buffer's mark is, and the user's next command is Meta-y. */
5315 insert_from_string_before_markers (text
, 0, 0,
5316 SCHARS (text
), SBYTES (text
), 0);
5318 /* Make sure the process marker's position is valid when the
5319 process buffer is changed in the signal_after_change above.
5320 W3 is known to do that. */
5321 if (BUFFERP (p
->buffer
)
5322 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5323 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5325 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5327 update_mode_lines
++;
5329 /* Make sure opoint and the old restrictions
5330 float ahead of any new text just as point would. */
5331 if (opoint
>= before
)
5333 opoint
+= PT
- before
;
5334 opoint_byte
+= PT_BYTE
- before_byte
;
5336 if (old_begv
> before
)
5338 old_begv
+= PT
- before
;
5339 old_begv_byte
+= PT_BYTE
- before_byte
;
5341 if (old_zv
>= before
)
5343 old_zv
+= PT
- before
;
5344 old_zv_byte
+= PT_BYTE
- before_byte
;
5347 /* If the restriction isn't what it should be, set it. */
5348 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5349 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5352 BVAR (current_buffer
, read_only
) = old_read_only
;
5353 SET_PT_BOTH (opoint
, opoint_byte
);
5355 /* Handling the process output should not deactivate the mark. */
5356 Vdeactivate_mark
= odeactivate
;
5358 unbind_to (count
, Qnil
);
5362 /* Sending data to subprocess */
5364 static jmp_buf send_process_frame
;
5365 static Lisp_Object process_sent_to
;
5367 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5368 static void send_process_trap (int) NO_RETURN
;
5372 send_process_trap (int ignore
)
5374 SIGNAL_THREAD_CHECK (SIGPIPE
);
5375 sigunblock (sigmask (SIGPIPE
));
5376 longjmp (send_process_frame
, 1);
5379 /* Send some data to process PROC.
5380 BUF is the beginning of the data; LEN is the number of characters.
5381 OBJECT is the Lisp object that the data comes from. If OBJECT is
5382 nil or t, it means that the data comes from C string.
5384 If OBJECT is not nil, the data is encoded by PROC's coding-system
5385 for encoding before it is sent.
5387 This function can evaluate Lisp code and can garbage collect. */
5390 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5391 volatile EMACS_INT len
, volatile Lisp_Object object
)
5393 /* Use volatile to protect variables from being clobbered by longjmp. */
5394 struct Lisp_Process
*p
= XPROCESS (proc
);
5396 struct coding_system
*coding
;
5397 struct gcpro gcpro1
;
5398 void (*volatile old_sigpipe
) (int);
5402 if (p
->raw_status_new
)
5404 if (! EQ (p
->status
, Qrun
))
5405 error ("Process %s not running", SDATA (p
->name
));
5407 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5409 coding
= proc_encode_coding_system
[p
->outfd
];
5410 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5412 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5413 || (BUFFERP (object
)
5414 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5417 p
->encode_coding_system
5418 = complement_process_encoding_system (p
->encode_coding_system
);
5419 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5421 /* The coding system for encoding was changed to raw-text
5422 because we sent a unibyte text previously. Now we are
5423 sending a multibyte text, thus we must encode it by the
5424 original coding system specified for the current process.
5426 Another reason we come here is that the coding system
5427 was just complemented and a new one was returned by
5428 complement_process_encoding_system. */
5429 setup_coding_system (p
->encode_coding_system
, coding
);
5430 Vlast_coding_system_used
= p
->encode_coding_system
;
5432 coding
->src_multibyte
= 1;
5436 coding
->src_multibyte
= 0;
5437 /* For sending a unibyte text, character code conversion should
5438 not take place but EOL conversion should. So, setup raw-text
5439 or one of the subsidiary if we have not yet done it. */
5440 if (CODING_REQUIRE_ENCODING (coding
))
5442 if (CODING_REQUIRE_FLUSHING (coding
))
5444 /* But, before changing the coding, we must flush out data. */
5445 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5446 send_process (proc
, "", 0, Qt
);
5447 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5449 setup_coding_system (raw_text_coding_system
5450 (Vlast_coding_system_used
),
5452 coding
->src_multibyte
= 0;
5455 coding
->dst_multibyte
= 0;
5457 if (CODING_REQUIRE_ENCODING (coding
))
5459 coding
->dst_object
= Qt
;
5460 if (BUFFERP (object
))
5462 EMACS_INT from_byte
, from
, to
;
5463 EMACS_INT save_pt
, save_pt_byte
;
5464 struct buffer
*cur
= current_buffer
;
5466 set_buffer_internal (XBUFFER (object
));
5467 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5469 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5470 from
= BYTE_TO_CHAR (from_byte
);
5471 to
= BYTE_TO_CHAR (from_byte
+ len
);
5472 TEMP_SET_PT_BOTH (from
, from_byte
);
5473 encode_coding_object (coding
, object
, from
, from_byte
,
5474 to
, from_byte
+ len
, Qt
);
5475 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5476 set_buffer_internal (cur
);
5478 else if (STRINGP (object
))
5480 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5481 SBYTES (object
), Qt
);
5485 coding
->dst_object
= make_unibyte_string (buf
, len
);
5486 coding
->produced
= len
;
5489 len
= coding
->produced
;
5490 object
= coding
->dst_object
;
5491 buf
= SSDATA (object
);
5494 if (pty_max_bytes
== 0)
5496 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5497 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5498 if (pty_max_bytes
< 0)
5499 pty_max_bytes
= 250;
5501 pty_max_bytes
= 250;
5503 /* Deduct one, to leave space for the eof. */
5507 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5508 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5509 when returning with longjmp despite being declared volatile. */
5510 if (!setjmp (send_process_frame
))
5512 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5514 process_sent_to
= proc
;
5517 EMACS_INT
this = len
;
5519 /* Send this batch, using one or more write calls. */
5522 EMACS_INT written
= 0;
5523 int outfd
= p
->outfd
;
5524 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5525 #ifdef DATAGRAM_SOCKETS
5526 if (DATAGRAM_CHAN_P (outfd
))
5528 rv
= sendto (outfd
, buf
, this,
5529 0, datagram_address
[outfd
].sa
,
5530 datagram_address
[outfd
].len
);
5533 else if (errno
== EMSGSIZE
)
5535 signal (SIGPIPE
, old_sigpipe
);
5536 report_file_error ("sending datagram",
5537 Fcons (proc
, Qnil
));
5545 written
= emacs_gnutls_write (p
, buf
, this);
5548 written
= emacs_write (outfd
, buf
, this);
5549 rv
= (written
? 0 : -1);
5550 #ifdef ADAPTIVE_READ_BUFFERING
5551 if (p
->read_output_delay
> 0
5552 && p
->adaptive_read_buffering
== 1)
5554 p
->read_output_delay
= 0;
5555 process_output_delay_count
--;
5556 p
->read_output_skip
= 0;
5560 signal (SIGPIPE
, old_sigpipe
);
5566 || errno
== EWOULDBLOCK
5572 /* Buffer is full. Wait, accepting input;
5573 that may allow the program
5574 to finish doing output and read more. */
5576 EMACS_INT offset
= 0;
5578 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5579 /* A gross hack to work around a bug in FreeBSD.
5580 In the following sequence, read(2) returns
5584 write(2) 954 bytes, get EAGAIN
5585 read(2) 1024 bytes in process_read_output
5586 read(2) 11 bytes in process_read_output
5588 That is, read(2) returns more bytes than have
5589 ever been written successfully. The 1033 bytes
5590 read are the 1022 bytes written successfully
5591 after processing (for example with CRs added if
5592 the terminal is set up that way which it is
5593 here). The same bytes will be seen again in a
5594 later read(2), without the CRs. */
5596 if (errno
== EAGAIN
)
5599 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5601 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5603 /* Running filters might relocate buffers or strings.
5604 Arrange to relocate BUF. */
5605 if (BUFFERP (object
))
5606 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5607 (unsigned char *) buf
);
5608 else if (STRINGP (object
))
5609 offset
= buf
- SSDATA (object
);
5611 #ifdef EMACS_HAS_USECS
5612 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5614 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5617 if (BUFFERP (object
))
5618 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5620 else if (STRINGP (object
))
5621 buf
= offset
+ SSDATA (object
);
5624 /* This is a real error. */
5625 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5635 signal (SIGPIPE
, old_sigpipe
);
5636 proc
= process_sent_to
;
5637 p
= XPROCESS (proc
);
5638 p
->raw_status_new
= 0;
5639 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5640 p
->tick
= ++process_tick
;
5641 deactivate_process (proc
);
5642 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5648 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5650 doc
: /* Send current contents of region as input to PROCESS.
5651 PROCESS may be a process, a buffer, the name of a process or buffer, or
5652 nil, indicating the current buffer's process.
5653 Called from program, takes three arguments, PROCESS, START and END.
5654 If the region is more than 500 characters long,
5655 it is sent in several bunches. This may happen even for shorter regions.
5656 Output from processes can arrive in between bunches. */)
5657 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5660 EMACS_INT start1
, end1
;
5662 proc
= get_process (process
);
5663 validate_region (&start
, &end
);
5665 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5666 move_gap (XINT (start
));
5668 start1
= CHAR_TO_BYTE (XINT (start
));
5669 end1
= CHAR_TO_BYTE (XINT (end
));
5670 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5671 Fcurrent_buffer ());
5676 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5678 doc
: /* Send PROCESS the contents of STRING as input.
5679 PROCESS may be a process, a buffer, the name of a process or buffer, or
5680 nil, indicating the current buffer's process.
5681 If STRING is more than 500 characters long,
5682 it is sent in several bunches. This may happen even for shorter strings.
5683 Output from processes can arrive in between bunches. */)
5684 (Lisp_Object process
, Lisp_Object string
)
5687 CHECK_STRING (string
);
5688 proc
= get_process (process
);
5689 send_process (proc
, SSDATA (string
),
5690 SBYTES (string
), string
);
5694 /* Return the foreground process group for the tty/pty that
5695 the process P uses. */
5697 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5702 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5705 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5706 master side. Try the slave side. */
5707 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5711 ioctl (fd
, TIOCGPGRP
, &gid
);
5715 #endif /* defined (TIOCGPGRP ) */
5720 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5721 Sprocess_running_child_p
, 0, 1, 0,
5722 doc
: /* Return t if PROCESS has given the terminal to a child.
5723 If the operating system does not make it possible to find out,
5724 return t unconditionally. */)
5725 (Lisp_Object process
)
5727 /* Initialize in case ioctl doesn't exist or gives an error,
5728 in a way that will cause returning t. */
5731 struct Lisp_Process
*p
;
5733 proc
= get_process (process
);
5734 p
= XPROCESS (proc
);
5736 if (!EQ (p
->type
, Qreal
))
5737 error ("Process %s is not a subprocess",
5740 error ("Process %s is not active",
5743 gid
= emacs_get_tty_pgrp (p
);
5750 /* send a signal number SIGNO to PROCESS.
5751 If CURRENT_GROUP is t, that means send to the process group
5752 that currently owns the terminal being used to communicate with PROCESS.
5753 This is used for various commands in shell mode.
5754 If CURRENT_GROUP is lambda, that means send to the process group
5755 that currently owns the terminal, but only if it is NOT the shell itself.
5757 If NOMSG is zero, insert signal-announcements into process's buffers
5760 If we can, we try to signal PROCESS by sending control characters
5761 down the pty. This allows us to signal inferiors who have changed
5762 their uid, for which killpg would return an EPERM error. */
5765 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5769 register struct Lisp_Process
*p
;
5773 proc
= get_process (process
);
5774 p
= XPROCESS (proc
);
5776 if (!EQ (p
->type
, Qreal
))
5777 error ("Process %s is not a subprocess",
5780 error ("Process %s is not active",
5784 current_group
= Qnil
;
5786 /* If we are using pgrps, get a pgrp number and make it negative. */
5787 if (NILP (current_group
))
5788 /* Send the signal to the shell's process group. */
5792 #ifdef SIGNALS_VIA_CHARACTERS
5793 /* If possible, send signals to the entire pgrp
5794 by sending an input character to it. */
5797 cc_t
*sig_char
= NULL
;
5799 tcgetattr (p
->infd
, &t
);
5804 sig_char
= &t
.c_cc
[VINTR
];
5808 sig_char
= &t
.c_cc
[VQUIT
];
5812 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5813 sig_char
= &t
.c_cc
[VSWTCH
];
5815 sig_char
= &t
.c_cc
[VSUSP
];
5820 if (sig_char
&& *sig_char
!= CDISABLE
)
5822 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5825 /* If we can't send the signal with a character,
5826 fall through and send it another way. */
5828 /* The code above may fall through if it can't
5829 handle the signal. */
5830 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5833 /* Get the current pgrp using the tty itself, if we have that.
5834 Otherwise, use the pty to get the pgrp.
5835 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5836 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5837 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5838 His patch indicates that if TIOCGPGRP returns an error, then
5839 we should just assume that p->pid is also the process group id. */
5841 gid
= emacs_get_tty_pgrp (p
);
5844 /* If we can't get the information, assume
5845 the shell owns the tty. */
5848 /* It is not clear whether anything really can set GID to -1.
5849 Perhaps on some system one of those ioctls can or could do so.
5850 Or perhaps this is vestigial. */
5853 #else /* ! defined (TIOCGPGRP ) */
5854 /* Can't select pgrps on this system, so we know that
5855 the child itself heads the pgrp. */
5857 #endif /* ! defined (TIOCGPGRP ) */
5859 /* If current_group is lambda, and the shell owns the terminal,
5860 don't send any signal. */
5861 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5869 p
->raw_status_new
= 0;
5871 p
->tick
= ++process_tick
;
5874 status_notify (NULL
);
5875 redisplay_preserve_echo_area (13);
5878 #endif /* ! defined (SIGCONT) */
5882 flush_pending_output (p
->infd
);
5886 /* If we don't have process groups, send the signal to the immediate
5887 subprocess. That isn't really right, but it's better than any
5888 obvious alternative. */
5891 kill (p
->pid
, signo
);
5895 /* gid may be a pid, or minus a pgrp's number */
5897 if (!NILP (current_group
))
5899 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5900 EMACS_KILLPG (gid
, signo
);
5907 #else /* ! defined (TIOCSIGSEND) */
5908 EMACS_KILLPG (gid
, signo
);
5909 #endif /* ! defined (TIOCSIGSEND) */
5912 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5913 doc
: /* Interrupt process PROCESS.
5914 PROCESS may be a process, a buffer, or the name of a process or buffer.
5915 No arg or nil means current buffer's process.
5916 Second arg CURRENT-GROUP non-nil means send signal to
5917 the current process-group of the process's controlling terminal
5918 rather than to the process's own process group.
5919 If the process is a shell, this means interrupt current subjob
5920 rather than the shell.
5922 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5923 don't send the signal. */)
5924 (Lisp_Object process
, Lisp_Object current_group
)
5926 process_send_signal (process
, SIGINT
, current_group
, 0);
5930 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5931 doc
: /* Kill process PROCESS. May be process or name of one.
5932 See function `interrupt-process' for more details on usage. */)
5933 (Lisp_Object process
, Lisp_Object current_group
)
5935 process_send_signal (process
, SIGKILL
, current_group
, 0);
5939 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5940 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5941 See function `interrupt-process' for more details on usage. */)
5942 (Lisp_Object process
, Lisp_Object current_group
)
5944 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5948 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5949 doc
: /* Stop process PROCESS. May be process or name of one.
5950 See function `interrupt-process' for more details on usage.
5951 If PROCESS is a network or serial process, inhibit handling of incoming
5953 (Lisp_Object process
, Lisp_Object current_group
)
5955 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5957 struct Lisp_Process
*p
;
5959 p
= XPROCESS (process
);
5960 if (NILP (p
->command
)
5963 FD_CLR (p
->infd
, &input_wait_mask
);
5964 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5970 error ("No SIGTSTP support");
5972 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5977 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5978 doc
: /* Continue process PROCESS. May be process or name of one.
5979 See function `interrupt-process' for more details on usage.
5980 If PROCESS is a network or serial process, resume handling of incoming
5982 (Lisp_Object process
, Lisp_Object current_group
)
5984 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5986 struct Lisp_Process
*p
;
5988 p
= XPROCESS (process
);
5989 if (EQ (p
->command
, Qt
)
5991 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5993 FD_SET (p
->infd
, &input_wait_mask
);
5994 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5996 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5997 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5998 #else /* not WINDOWSNT */
5999 tcflush (p
->infd
, TCIFLUSH
);
6000 #endif /* not WINDOWSNT */
6006 process_send_signal (process
, SIGCONT
, current_group
, 0);
6008 error ("No SIGCONT support");
6013 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6014 2, 2, "sProcess (name or number): \nnSignal code: ",
6015 doc
: /* Send PROCESS the signal with code SIGCODE.
6016 PROCESS may also be a number specifying the process id of the
6017 process to signal; in this case, the process need not be a child of
6019 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6020 (Lisp_Object process
, Lisp_Object sigcode
)
6024 if (INTEGERP (process
))
6026 pid
= XINT (process
);
6030 if (FLOATP (process
))
6032 pid
= (pid_t
) XFLOAT_DATA (process
);
6036 if (STRINGP (process
))
6039 if (tem
= Fget_process (process
), NILP (tem
))
6041 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6048 process
= get_process (process
);
6053 CHECK_PROCESS (process
);
6054 pid
= XPROCESS (process
)->pid
;
6056 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6060 #define parse_signal(NAME, VALUE) \
6061 else if (!xstrcasecmp (name, NAME)) \
6062 XSETINT (sigcode, VALUE)
6064 if (INTEGERP (sigcode
))
6070 CHECK_SYMBOL (sigcode
);
6071 name
= SSDATA (SYMBOL_NAME (sigcode
));
6073 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6079 parse_signal ("usr1", SIGUSR1
);
6082 parse_signal ("usr2", SIGUSR2
);
6085 parse_signal ("term", SIGTERM
);
6088 parse_signal ("hup", SIGHUP
);
6091 parse_signal ("int", SIGINT
);
6094 parse_signal ("quit", SIGQUIT
);
6097 parse_signal ("ill", SIGILL
);
6100 parse_signal ("abrt", SIGABRT
);
6103 parse_signal ("emt", SIGEMT
);
6106 parse_signal ("kill", SIGKILL
);
6109 parse_signal ("fpe", SIGFPE
);
6112 parse_signal ("bus", SIGBUS
);
6115 parse_signal ("segv", SIGSEGV
);
6118 parse_signal ("sys", SIGSYS
);
6121 parse_signal ("pipe", SIGPIPE
);
6124 parse_signal ("alrm", SIGALRM
);
6127 parse_signal ("urg", SIGURG
);
6130 parse_signal ("stop", SIGSTOP
);
6133 parse_signal ("tstp", SIGTSTP
);
6136 parse_signal ("cont", SIGCONT
);
6139 parse_signal ("chld", SIGCHLD
);
6142 parse_signal ("ttin", SIGTTIN
);
6145 parse_signal ("ttou", SIGTTOU
);
6148 parse_signal ("io", SIGIO
);
6151 parse_signal ("xcpu", SIGXCPU
);
6154 parse_signal ("xfsz", SIGXFSZ
);
6157 parse_signal ("vtalrm", SIGVTALRM
);
6160 parse_signal ("prof", SIGPROF
);
6163 parse_signal ("winch", SIGWINCH
);
6166 parse_signal ("info", SIGINFO
);
6169 error ("Undefined signal name %s", name
);
6174 return make_number (kill (pid
, XINT (sigcode
)));
6177 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6178 doc
: /* Make PROCESS see end-of-file in its input.
6179 EOF comes after any text already sent to it.
6180 PROCESS may be a process, a buffer, the name of a process or buffer, or
6181 nil, indicating the current buffer's process.
6182 If PROCESS is a network connection, or is a process communicating
6183 through a pipe (as opposed to a pty), then you cannot send any more
6184 text to PROCESS after you call this function.
6185 If PROCESS is a serial process, wait until all output written to the
6186 process has been transmitted to the serial port. */)
6187 (Lisp_Object process
)
6190 struct coding_system
*coding
;
6192 if (DATAGRAM_CONN_P (process
))
6195 proc
= get_process (process
);
6196 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6198 /* Make sure the process is really alive. */
6199 if (XPROCESS (proc
)->raw_status_new
)
6200 update_status (XPROCESS (proc
));
6201 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6202 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6204 if (CODING_REQUIRE_FLUSHING (coding
))
6206 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6207 send_process (proc
, "", 0, Qnil
);
6210 if (XPROCESS (proc
)->pty_flag
)
6211 send_process (proc
, "\004", 1, Qnil
);
6212 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6215 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6216 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6217 #endif /* not WINDOWSNT */
6218 /* Do nothing on Windows because writes are blocking. */
6222 int old_outfd
, new_outfd
;
6224 #ifdef HAVE_SHUTDOWN
6225 /* If this is a network connection, or socketpair is used
6226 for communication with the subprocess, call shutdown to cause EOF.
6227 (In some old system, shutdown to socketpair doesn't work.
6228 Then we just can't win.) */
6229 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6230 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6231 shutdown (XPROCESS (proc
)->outfd
, 1);
6232 /* In case of socketpair, outfd == infd, so don't close it. */
6233 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6234 emacs_close (XPROCESS (proc
)->outfd
);
6235 #else /* not HAVE_SHUTDOWN */
6236 emacs_close (XPROCESS (proc
)->outfd
);
6237 #endif /* not HAVE_SHUTDOWN */
6238 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6241 old_outfd
= XPROCESS (proc
)->outfd
;
6243 if (!proc_encode_coding_system
[new_outfd
])
6244 proc_encode_coding_system
[new_outfd
]
6245 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6246 memcpy (proc_encode_coding_system
[new_outfd
],
6247 proc_encode_coding_system
[old_outfd
],
6248 sizeof (struct coding_system
));
6249 memset (proc_encode_coding_system
[old_outfd
], 0,
6250 sizeof (struct coding_system
));
6252 XPROCESS (proc
)->outfd
= new_outfd
;
6257 /* On receipt of a signal that a child status has changed, loop asking
6258 about children with changed statuses until the system says there
6261 All we do is change the status; we do not run sentinels or print
6262 notifications. That is saved for the next time keyboard input is
6263 done, in order to avoid timing errors.
6265 ** WARNING: this can be called during garbage collection.
6266 Therefore, it must not be fooled by the presence of mark bits in
6269 ** USG WARNING: Although it is not obvious from the documentation
6270 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6271 signal() before executing at least one wait(), otherwise the
6272 handler will be called again, resulting in an infinite loop. The
6273 relevant portion of the documentation reads "SIGCLD signals will be
6274 queued and the signal-catching function will be continually
6275 reentered until the queue is empty". Invoking signal() causes the
6276 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6279 ** Malloc WARNING: This should never call malloc either directly or
6280 indirectly; if it does, that is a bug */
6284 sigchld_handler (int signo
)
6286 int old_errno
= errno
;
6288 struct Lisp_Process
*p
;
6290 SIGNAL_THREAD_CHECK (signo
);
6301 #endif /* no WUNTRACED */
6302 /* Keep trying to get a status until we get a definitive result. */
6306 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6308 while (pid
< 0 && errno
== EINTR
);
6312 /* PID == 0 means no processes found, PID == -1 means a real
6313 failure. We have done all our job, so return. */
6320 #endif /* no WNOHANG */
6322 /* Find the process that signaled us, and record its status. */
6324 /* The process can have been deleted by Fdelete_process. */
6325 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6327 Lisp_Object xpid
= XCAR (tail
);
6328 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6329 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6331 XSETCAR (tail
, Qnil
);
6332 goto sigchld_end_of_loop
;
6336 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6338 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6340 proc
= XCDR (XCAR (tail
));
6341 p
= XPROCESS (proc
);
6342 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6347 /* Look for an asynchronous process whose pid hasn't been filled
6350 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6352 proc
= XCDR (XCAR (tail
));
6353 p
= XPROCESS (proc
);
6359 /* Change the status of the process that was found. */
6362 int clear_desc_flag
= 0;
6364 p
->tick
= ++process_tick
;
6366 p
->raw_status_new
= 1;
6368 /* If process has terminated, stop waiting for its output. */
6369 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6371 clear_desc_flag
= 1;
6373 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6374 if (clear_desc_flag
)
6376 FD_CLR (p
->infd
, &input_wait_mask
);
6377 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6380 /* Tell wait_reading_process_output that it needs to wake up and
6382 if (input_available_clear_time
)
6383 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6386 /* There was no asynchronous process found for that pid: we have
6387 a synchronous process. */
6390 synch_process_alive
= 0;
6392 /* Report the status of the synchronous process. */
6394 synch_process_retcode
= WRETCODE (w
);
6395 else if (WIFSIGNALED (w
))
6396 synch_process_termsig
= WTERMSIG (w
);
6398 /* Tell wait_reading_process_output that it needs to wake up and
6400 if (input_available_clear_time
)
6401 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6404 sigchld_end_of_loop
:
6407 /* On some systems, we must return right away.
6408 If any more processes want to signal us, we will
6410 Otherwise (on systems that have WNOHANG), loop around
6411 to use up all the processes that have something to tell us. */
6412 #if (defined WINDOWSNT \
6413 || (defined USG && !defined GNU_LINUX \
6414 && !(defined HPUX && defined WNOHANG)))
6417 #endif /* USG, but not HPUX with WNOHANG */
6420 #endif /* SIGCHLD */
6424 exec_sentinel_unwind (Lisp_Object data
)
6426 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6431 exec_sentinel_error_handler (Lisp_Object error_val
)
6433 cmd_error_internal (error_val
, "error in process sentinel: ");
6435 update_echo_area ();
6436 Fsleep_for (make_number (2), Qnil
);
6441 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6443 Lisp_Object sentinel
, odeactivate
;
6444 register struct Lisp_Process
*p
= XPROCESS (proc
);
6445 int count
= SPECPDL_INDEX ();
6446 int outer_running_asynch_code
= running_asynch_code
;
6447 int waiting
= waiting_for_user_input_p
;
6449 if (inhibit_sentinels
)
6452 /* No need to gcpro these, because all we do with them later
6453 is test them for EQness, and none of them should be a string. */
6454 odeactivate
= Vdeactivate_mark
;
6456 Lisp_Object obuffer
, okeymap
;
6457 XSETBUFFER (obuffer
, current_buffer
);
6458 okeymap
= BVAR (current_buffer
, keymap
);
6461 /* There's no good reason to let sentinels change the current
6462 buffer, and many callers of accept-process-output, sit-for, and
6463 friends don't expect current-buffer to be changed from under them. */
6464 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6466 sentinel
= p
->sentinel
;
6467 if (NILP (sentinel
))
6470 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6471 assure that it gets restored no matter how the sentinel exits. */
6473 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6474 /* Inhibit quit so that random quits don't screw up a running filter. */
6475 specbind (Qinhibit_quit
, Qt
);
6476 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6478 /* In case we get recursively called,
6479 and we already saved the match data nonrecursively,
6480 save the same match data in safely recursive fashion. */
6481 if (outer_running_asynch_code
)
6484 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6485 restore_search_regs ();
6486 record_unwind_save_match_data ();
6487 Fset_match_data (tem
, Qt
);
6490 /* For speed, if a search happens within this code,
6491 save the match data in a special nonrecursive fashion. */
6492 running_asynch_code
= 1;
6494 internal_condition_case_1 (read_process_output_call
,
6496 Fcons (proc
, Fcons (reason
, Qnil
))),
6497 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6498 exec_sentinel_error_handler
);
6500 /* If we saved the match data nonrecursively, restore it now. */
6501 restore_search_regs ();
6502 running_asynch_code
= outer_running_asynch_code
;
6504 Vdeactivate_mark
= odeactivate
;
6506 /* Restore waiting_for_user_input_p as it was
6507 when we were called, in case the filter clobbered it. */
6508 waiting_for_user_input_p
= waiting
;
6511 if (! EQ (Fcurrent_buffer (), obuffer
)
6512 || ! EQ (current_buffer
->keymap
, okeymap
))
6514 /* But do it only if the caller is actually going to read events.
6515 Otherwise there's no need to make him wake up, and it could
6516 cause trouble (for example it would make sit_for return). */
6517 if (waiting_for_user_input_p
== -1)
6518 record_asynch_buffer_change ();
6520 unbind_to (count
, Qnil
);
6523 /* Report all recent events of a change in process status
6524 (either run the sentinel or output a message).
6525 This is usually done while Emacs is waiting for keyboard input
6526 but can be done at other times. */
6529 status_notify (struct Lisp_Process
*deleting_process
)
6531 register Lisp_Object proc
, buffer
;
6532 Lisp_Object tail
, msg
;
6533 struct gcpro gcpro1
, gcpro2
;
6537 /* We need to gcpro tail; if read_process_output calls a filter
6538 which deletes a process and removes the cons to which tail points
6539 from Vprocess_alist, and then causes a GC, tail is an unprotected
6543 /* Set this now, so that if new processes are created by sentinels
6544 that we run, we get called again to handle their status changes. */
6545 update_tick
= process_tick
;
6547 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6550 register struct Lisp_Process
*p
;
6552 proc
= Fcdr (XCAR (tail
));
6553 p
= XPROCESS (proc
);
6555 if (p
->tick
!= p
->update_tick
)
6557 p
->update_tick
= p
->tick
;
6559 /* If process is still active, read any output that remains. */
6560 while (! EQ (p
->filter
, Qt
)
6561 && ! EQ (p
->status
, Qconnect
)
6562 && ! EQ (p
->status
, Qlisten
)
6563 /* Network or serial process not stopped: */
6564 && ! EQ (p
->command
, Qt
)
6566 && p
!= deleting_process
6567 && read_process_output (proc
, p
->infd
) > 0);
6571 /* Get the text to use for the message. */
6572 if (p
->raw_status_new
)
6574 msg
= status_message (p
);
6576 /* If process is terminated, deactivate it or delete it. */
6578 if (CONSP (p
->status
))
6579 symbol
= XCAR (p
->status
);
6581 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6582 || EQ (symbol
, Qclosed
))
6584 if (delete_exited_processes
)
6585 remove_process (proc
);
6587 deactivate_process (proc
);
6590 /* The actions above may have further incremented p->tick.
6591 So set p->update_tick again
6592 so that an error in the sentinel will not cause
6593 this code to be run again. */
6594 p
->update_tick
= p
->tick
;
6595 /* Now output the message suitably. */
6596 if (!NILP (p
->sentinel
))
6597 exec_sentinel (proc
, msg
);
6598 /* Don't bother with a message in the buffer
6599 when a process becomes runnable. */
6600 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6603 struct buffer
*old
= current_buffer
;
6604 EMACS_INT opoint
, opoint_byte
;
6605 EMACS_INT before
, before_byte
;
6607 /* Avoid error if buffer is deleted
6608 (probably that's why the process is dead, too) */
6609 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6611 Fset_buffer (buffer
);
6614 opoint_byte
= PT_BYTE
;
6615 /* Insert new output into buffer
6616 at the current end-of-output marker,
6617 thus preserving logical ordering of input and output. */
6618 if (XMARKER (p
->mark
)->buffer
)
6619 Fgoto_char (p
->mark
);
6621 SET_PT_BOTH (ZV
, ZV_BYTE
);
6624 before_byte
= PT_BYTE
;
6626 tem
= BVAR (current_buffer
, read_only
);
6627 BVAR (current_buffer
, read_only
) = Qnil
;
6628 insert_string ("\nProcess ");
6629 Finsert (1, &p
->name
);
6630 insert_string (" ");
6632 BVAR (current_buffer
, read_only
) = tem
;
6633 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6635 if (opoint
>= before
)
6636 SET_PT_BOTH (opoint
+ (PT
- before
),
6637 opoint_byte
+ (PT_BYTE
- before_byte
));
6639 SET_PT_BOTH (opoint
, opoint_byte
);
6641 set_buffer_internal (old
);
6646 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6651 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6652 Sset_process_coding_system
, 1, 3, 0,
6653 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6654 DECODING will be used to decode subprocess output and ENCODING to
6655 encode subprocess input. */)
6656 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6658 register struct Lisp_Process
*p
;
6660 CHECK_PROCESS (process
);
6661 p
= XPROCESS (process
);
6663 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6665 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6666 Fcheck_coding_system (decoding
);
6667 Fcheck_coding_system (encoding
);
6668 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6669 p
->decode_coding_system
= decoding
;
6670 p
->encode_coding_system
= encoding
;
6671 setup_process_coding_systems (process
);
6676 DEFUN ("process-coding-system",
6677 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6678 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6679 (register Lisp_Object process
)
6681 CHECK_PROCESS (process
);
6682 return Fcons (XPROCESS (process
)->decode_coding_system
,
6683 XPROCESS (process
)->encode_coding_system
);
6686 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6687 Sset_process_filter_multibyte
, 2, 2, 0,
6688 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6689 If FLAG is non-nil, the filter is given multibyte strings.
6690 If FLAG is nil, the filter is given unibyte strings. In this case,
6691 all character code conversion except for end-of-line conversion is
6693 (Lisp_Object process
, Lisp_Object flag
)
6695 register struct Lisp_Process
*p
;
6697 CHECK_PROCESS (process
);
6698 p
= XPROCESS (process
);
6700 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6701 setup_process_coding_systems (process
);
6706 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6707 Sprocess_filter_multibyte_p
, 1, 1, 0,
6708 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6709 (Lisp_Object process
)
6711 register struct Lisp_Process
*p
;
6712 struct coding_system
*coding
;
6714 CHECK_PROCESS (process
);
6715 p
= XPROCESS (process
);
6716 coding
= proc_decode_coding_system
[p
->infd
];
6717 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6726 add_gpm_wait_descriptor (int desc
)
6728 add_keyboard_wait_descriptor (desc
);
6732 delete_gpm_wait_descriptor (int desc
)
6734 delete_keyboard_wait_descriptor (desc
);
6741 /* Return nonzero if *MASK has a bit set
6742 that corresponds to one of the keyboard input descriptors. */
6745 keyboard_bit_set (fd_set
*mask
)
6749 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6750 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6751 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6758 #else /* not subprocesses */
6760 /* Defined on msdos.c. */
6761 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6764 /* Implementation of wait_reading_process_output, assuming that there
6765 are no subprocesses. Used only by the MS-DOS build.
6767 Wait for timeout to elapse and/or keyboard input to be available.
6770 timeout in seconds, or
6771 zero for no limit, or
6772 -1 means gobble data immediately available but don't wait for any.
6774 read_kbd is a Lisp_Object:
6775 0 to ignore keyboard input, or
6776 1 to return when input is available, or
6777 -1 means caller will actually read the input, so don't throw to
6780 see full version for other parameters. We know that wait_proc will
6781 always be NULL, since `subprocesses' isn't defined.
6783 do_display != 0 means redisplay should be done to show subprocess
6784 output that arrives.
6786 Return true if we received input from any process. */
6789 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6791 Lisp_Object wait_for_cell
,
6792 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6795 EMACS_TIME end_time
, timeout
;
6796 SELECT_TYPE waitchannels
;
6799 /* What does time_limit really mean? */
6800 if (time_limit
|| microsecs
)
6802 EMACS_GET_TIME (end_time
);
6803 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6804 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6807 /* Turn off periodic alarms (in case they are in use)
6808 and then turn off any other atimers,
6809 because the select emulator uses alarms. */
6811 turn_on_atimers (0);
6815 int timeout_reduced_for_timers
= 0;
6817 /* If calling from keyboard input, do not quit
6818 since we want to return C-g as an input character.
6819 Otherwise, do pending quit if requested. */
6823 /* Exit now if the cell we're waiting for became non-nil. */
6824 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6827 /* Compute time from now till when time limit is up */
6828 /* Exit if already run out */
6829 if (time_limit
== -1)
6831 /* -1 specified for timeout means
6832 gobble output available now
6833 but don't wait at all. */
6835 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6837 else if (time_limit
|| microsecs
)
6839 EMACS_GET_TIME (timeout
);
6840 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6841 if (EMACS_TIME_NEG_P (timeout
))
6846 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6849 /* If our caller will not immediately handle keyboard events,
6850 run timer events directly.
6851 (Callers that will immediately read keyboard events
6852 call timer_delay on their own.) */
6853 if (NILP (wait_for_cell
))
6855 EMACS_TIME timer_delay
;
6859 int old_timers_run
= timers_run
;
6860 timer_delay
= timer_check ();
6861 if (timers_run
!= old_timers_run
&& do_display
)
6862 /* We must retry, since a timer may have requeued itself
6863 and that could alter the time delay. */
6864 redisplay_preserve_echo_area (14);
6868 while (!detect_input_pending ());
6870 /* If there is unread keyboard input, also return. */
6872 && requeued_events_pending_p ())
6875 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6877 EMACS_TIME difference
;
6878 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6879 if (EMACS_TIME_NEG_P (difference
))
6881 timeout
= timer_delay
;
6882 timeout_reduced_for_timers
= 1;
6887 /* Cause C-g and alarm signals to take immediate action,
6888 and cause input available signals to zero out timeout. */
6890 set_waiting_for_input (&timeout
);
6892 /* Wait till there is something to do. */
6894 if (! read_kbd
&& NILP (wait_for_cell
))
6895 FD_ZERO (&waitchannels
);
6897 FD_SET (0, &waitchannels
);
6899 /* If a frame has been newly mapped and needs updating,
6900 reprocess its display stuff. */
6901 if (frame_garbaged
&& do_display
)
6903 clear_waiting_for_input ();
6904 redisplay_preserve_echo_area (15);
6906 set_waiting_for_input (&timeout
);
6909 if (read_kbd
&& detect_input_pending ())
6912 FD_ZERO (&waitchannels
);
6915 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6920 /* Make C-g and alarm signals set flags again */
6921 clear_waiting_for_input ();
6923 /* If we woke up due to SIGWINCH, actually change size now. */
6924 do_pending_window_change (0);
6926 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6927 /* We waited the full specified time, so return now. */
6932 /* If the system call was interrupted, then go around the
6934 if (xerrno
== EINTR
)
6935 FD_ZERO (&waitchannels
);
6937 error ("select error: %s", emacs_strerror (xerrno
));
6940 /* Check for keyboard input */
6943 && detect_input_pending_run_timers (do_display
))
6945 swallow_events (do_display
);
6946 if (detect_input_pending_run_timers (do_display
))
6950 /* If there is unread keyboard input, also return. */
6952 && requeued_events_pending_p ())
6955 /* If wait_for_cell. check for keyboard input
6956 but don't run any timers.
6957 ??? (It seems wrong to me to check for keyboard
6958 input at all when wait_for_cell, but the code
6959 has been this way since July 1994.
6960 Try changing this after version 19.31.) */
6961 if (! NILP (wait_for_cell
)
6962 && detect_input_pending ())
6964 swallow_events (do_display
);
6965 if (detect_input_pending ())
6969 /* Exit now if the cell we're waiting for became non-nil. */
6970 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6979 #endif /* not subprocesses */
6981 /* The following functions are needed even if async subprocesses are
6982 not supported. Some of them are no-op stubs in that case. */
6984 /* Add DESC to the set of keyboard input descriptors. */
6987 add_keyboard_wait_descriptor (int desc
)
6989 #ifdef subprocesses /* actually means "not MSDOS" */
6990 FD_SET (desc
, &input_wait_mask
);
6991 FD_SET (desc
, &non_process_wait_mask
);
6992 if (desc
> max_input_desc
)
6993 max_input_desc
= desc
;
6997 /* From now on, do not expect DESC to give keyboard input. */
7000 delete_keyboard_wait_descriptor (int desc
)
7004 int lim
= max_input_desc
;
7006 FD_CLR (desc
, &input_wait_mask
);
7007 FD_CLR (desc
, &non_process_wait_mask
);
7009 if (desc
== max_input_desc
)
7010 for (fd
= 0; fd
< lim
; fd
++)
7011 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7012 max_input_desc
= fd
;
7016 /* Setup coding systems of PROCESS. */
7019 setup_process_coding_systems (Lisp_Object process
)
7022 struct Lisp_Process
*p
= XPROCESS (process
);
7024 int outch
= p
->outfd
;
7025 Lisp_Object coding_system
;
7027 if (inch
< 0 || outch
< 0)
7030 if (!proc_decode_coding_system
[inch
])
7031 proc_decode_coding_system
[inch
]
7032 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7033 coding_system
= p
->decode_coding_system
;
7034 if (! NILP (p
->filter
))
7036 else if (BUFFERP (p
->buffer
))
7038 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7039 coding_system
= raw_text_coding_system (coding_system
);
7041 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7043 if (!proc_encode_coding_system
[outch
])
7044 proc_encode_coding_system
[outch
]
7045 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7046 setup_coding_system (p
->encode_coding_system
,
7047 proc_encode_coding_system
[outch
]);
7051 /* Close all descriptors currently in use for communication
7052 with subprocess. This is used in a newly-forked subprocess
7053 to get rid of irrelevant descriptors. */
7056 close_process_descs (void)
7060 for (i
= 0; i
< MAXDESC
; i
++)
7062 Lisp_Object process
;
7063 process
= chan_process
[i
];
7064 if (!NILP (process
))
7066 int in
= XPROCESS (process
)->infd
;
7067 int out
= XPROCESS (process
)->outfd
;
7070 if (out
>= 0 && in
!= out
)
7077 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7078 doc
: /* Return the (or a) process associated with BUFFER.
7079 BUFFER may be a buffer or the name of one. */)
7080 (register Lisp_Object buffer
)
7083 register Lisp_Object buf
, tail
, proc
;
7085 if (NILP (buffer
)) return Qnil
;
7086 buf
= Fget_buffer (buffer
);
7087 if (NILP (buf
)) return Qnil
;
7089 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7091 proc
= Fcdr (XCAR (tail
));
7092 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7095 #endif /* subprocesses */
7099 DEFUN ("process-inherit-coding-system-flag",
7100 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7102 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7103 If this flag is t, `buffer-file-coding-system' of the buffer
7104 associated with PROCESS will inherit the coding system used to decode
7105 the process output. */)
7106 (register Lisp_Object process
)
7109 CHECK_PROCESS (process
);
7110 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7112 /* Ignore the argument and return the value of
7113 inherit-process-coding-system. */
7114 return inherit_process_coding_system
? Qt
: Qnil
;
7118 /* Kill all processes associated with `buffer'.
7119 If `buffer' is nil, kill all processes */
7122 kill_buffer_processes (Lisp_Object buffer
)
7125 Lisp_Object tail
, proc
;
7127 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7129 proc
= XCDR (XCAR (tail
));
7131 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7133 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7134 Fdelete_process (proc
);
7135 else if (XPROCESS (proc
)->infd
>= 0)
7136 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7139 #else /* subprocesses */
7140 /* Since we have no subprocesses, this does nothing. */
7141 #endif /* subprocesses */
7144 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7145 Swaiting_for_user_input_p
, 0, 0, 0,
7146 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7147 This is intended for use by asynchronous process output filters and sentinels. */)
7151 return (waiting_for_user_input_p
? Qt
: Qnil
);
7157 /* Stop reading input from keyboard sources. */
7160 hold_keyboard_input (void)
7165 /* Resume reading input from keyboard sources. */
7168 unhold_keyboard_input (void)
7173 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7176 kbd_on_hold_p (void)
7178 return kbd_is_on_hold
;
7182 /* Enumeration of and access to system processes a-la ps(1). */
7184 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7186 doc
: /* Return a list of numerical process IDs of all running processes.
7187 If this functionality is unsupported, return nil.
7189 See `process-attributes' for getting attributes of a process given its ID. */)
7192 return list_system_processes ();
7195 DEFUN ("process-attributes", Fprocess_attributes
,
7196 Sprocess_attributes
, 1, 1, 0,
7197 doc
: /* Return attributes of the process given by its PID, a number.
7199 Value is an alist where each element is a cons cell of the form
7203 If this functionality is unsupported, the value is nil.
7205 See `list-system-processes' for getting a list of all process IDs.
7207 The KEYs of the attributes that this function may return are listed
7208 below, together with the type of the associated VALUE (in parentheses).
7209 Not all platforms support all of these attributes; unsupported
7210 attributes will not appear in the returned alist.
7211 Unless explicitly indicated otherwise, numbers can have either
7212 integer or floating point values.
7214 euid -- Effective user User ID of the process (number)
7215 user -- User name corresponding to euid (string)
7216 egid -- Effective user Group ID of the process (number)
7217 group -- Group name corresponding to egid (string)
7218 comm -- Command name (executable name only) (string)
7219 state -- Process state code, such as "S", "R", or "T" (string)
7220 ppid -- Parent process ID (number)
7221 pgrp -- Process group ID (number)
7222 sess -- Session ID, i.e. process ID of session leader (number)
7223 ttname -- Controlling tty name (string)
7224 tpgid -- ID of foreground process group on the process's tty (number)
7225 minflt -- number of minor page faults (number)
7226 majflt -- number of major page faults (number)
7227 cminflt -- cumulative number of minor page faults (number)
7228 cmajflt -- cumulative number of major page faults (number)
7229 utime -- user time used by the process, in the (HIGH LOW USEC) format
7230 stime -- system time used by the process, in the (HIGH LOW USEC) format
7231 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7232 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7233 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7234 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7235 pri -- priority of the process (number)
7236 nice -- nice value of the process (number)
7237 thcount -- process thread count (number)
7238 start -- time the process started, in the (HIGH LOW USEC) format
7239 vsize -- virtual memory size of the process in KB's (number)
7240 rss -- resident set size of the process in KB's (number)
7241 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7242 pcpu -- percents of CPU time used by the process (floating-point number)
7243 pmem -- percents of total physical memory used by process's resident set
7244 (floating-point number)
7245 args -- command line which invoked the process (string). */)
7248 return system_process_attributes (pid
);
7258 inhibit_sentinels
= 0;
7262 if (! noninteractive
|| initialized
)
7264 signal (SIGCHLD
, sigchld_handler
);
7267 FD_ZERO (&input_wait_mask
);
7268 FD_ZERO (&non_keyboard_wait_mask
);
7269 FD_ZERO (&non_process_wait_mask
);
7270 FD_ZERO (&write_mask
);
7271 max_process_desc
= 0;
7272 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7274 #ifdef NON_BLOCKING_CONNECT
7275 FD_ZERO (&connect_wait_mask
);
7276 num_pending_connects
= 0;
7279 #ifdef ADAPTIVE_READ_BUFFERING
7280 process_output_delay_count
= 0;
7281 process_output_skip
= 0;
7284 /* Don't do this, it caused infinite select loops. The display
7285 method should call add_keyboard_wait_descriptor on stdin if it
7288 FD_SET (0, &input_wait_mask
);
7291 Vprocess_alist
= Qnil
;
7293 deleted_pid_list
= Qnil
;
7295 for (i
= 0; i
< MAXDESC
; i
++)
7297 chan_process
[i
] = Qnil
;
7298 proc_buffered_char
[i
] = -1;
7300 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7301 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7302 #ifdef DATAGRAM_SOCKETS
7303 memset (datagram_address
, 0, sizeof datagram_address
);
7307 Lisp_Object subfeatures
= Qnil
;
7308 const struct socket_options
*sopt
;
7310 #define ADD_SUBFEATURE(key, val) \
7311 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7313 #ifdef NON_BLOCKING_CONNECT
7314 ADD_SUBFEATURE (QCnowait
, Qt
);
7316 #ifdef DATAGRAM_SOCKETS
7317 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7319 #ifdef HAVE_SEQPACKET
7320 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7322 #ifdef HAVE_LOCAL_SOCKETS
7323 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7325 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7327 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7329 #ifdef HAVE_GETSOCKNAME
7330 ADD_SUBFEATURE (QCservice
, Qt
);
7332 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7333 ADD_SUBFEATURE (QCserver
, Qt
);
7336 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7337 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7339 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7342 #if defined (DARWIN_OS)
7343 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7344 processes. As such, we only change the default value. */
7347 char const *release
= (STRINGP (Voperating_system_release
)
7348 ? SSDATA (Voperating_system_release
)
7350 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7351 && release
[1] == '.')) {
7352 Vprocess_connection_type
= Qnil
;
7356 #endif /* subprocesses */
7361 syms_of_process (void)
7365 DEFSYM (Qprocessp
, "processp");
7366 DEFSYM (Qrun
, "run");
7367 DEFSYM (Qstop
, "stop");
7368 DEFSYM (Qsignal
, "signal");
7370 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7373 Qexit = intern_c_string ("exit");
7374 staticpro (&Qexit); */
7376 DEFSYM (Qopen
, "open");
7377 DEFSYM (Qclosed
, "closed");
7378 DEFSYM (Qconnect
, "connect");
7379 DEFSYM (Qfailed
, "failed");
7380 DEFSYM (Qlisten
, "listen");
7381 DEFSYM (Qlocal
, "local");
7382 DEFSYM (Qipv4
, "ipv4");
7384 DEFSYM (Qipv6
, "ipv6");
7386 DEFSYM (Qdatagram
, "datagram");
7387 DEFSYM (Qseqpacket
, "seqpacket");
7389 DEFSYM (QCport
, ":port");
7390 DEFSYM (QCspeed
, ":speed");
7391 DEFSYM (QCprocess
, ":process");
7393 DEFSYM (QCbytesize
, ":bytesize");
7394 DEFSYM (QCstopbits
, ":stopbits");
7395 DEFSYM (QCparity
, ":parity");
7396 DEFSYM (Qodd
, "odd");
7397 DEFSYM (Qeven
, "even");
7398 DEFSYM (QCflowcontrol
, ":flowcontrol");
7401 DEFSYM (QCsummary
, ":summary");
7403 DEFSYM (Qreal
, "real");
7404 DEFSYM (Qnetwork
, "network");
7405 DEFSYM (Qserial
, "serial");
7406 DEFSYM (QCbuffer
, ":buffer");
7407 DEFSYM (QChost
, ":host");
7408 DEFSYM (QCservice
, ":service");
7409 DEFSYM (QClocal
, ":local");
7410 DEFSYM (QCremote
, ":remote");
7411 DEFSYM (QCcoding
, ":coding");
7412 DEFSYM (QCserver
, ":server");
7413 DEFSYM (QCnowait
, ":nowait");
7414 DEFSYM (QCsentinel
, ":sentinel");
7415 DEFSYM (QClog
, ":log");
7416 DEFSYM (QCnoquery
, ":noquery");
7417 DEFSYM (QCstop
, ":stop");
7418 DEFSYM (QCoptions
, ":options");
7419 DEFSYM (QCplist
, ":plist");
7421 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7423 staticpro (&Vprocess_alist
);
7425 staticpro (&deleted_pid_list
);
7428 #endif /* subprocesses */
7430 DEFSYM (QCname
, ":name");
7431 DEFSYM (QCtype
, ":type");
7433 DEFSYM (Qeuid
, "euid");
7434 DEFSYM (Qegid
, "egid");
7435 DEFSYM (Quser
, "user");
7436 DEFSYM (Qgroup
, "group");
7437 DEFSYM (Qcomm
, "comm");
7438 DEFSYM (Qstate
, "state");
7439 DEFSYM (Qppid
, "ppid");
7440 DEFSYM (Qpgrp
, "pgrp");
7441 DEFSYM (Qsess
, "sess");
7442 DEFSYM (Qttname
, "ttname");
7443 DEFSYM (Qtpgid
, "tpgid");
7444 DEFSYM (Qminflt
, "minflt");
7445 DEFSYM (Qmajflt
, "majflt");
7446 DEFSYM (Qcminflt
, "cminflt");
7447 DEFSYM (Qcmajflt
, "cmajflt");
7448 DEFSYM (Qutime
, "utime");
7449 DEFSYM (Qstime
, "stime");
7450 DEFSYM (Qtime
, "time");
7451 DEFSYM (Qcutime
, "cutime");
7452 DEFSYM (Qcstime
, "cstime");
7453 DEFSYM (Qctime
, "ctime");
7454 DEFSYM (Qpri
, "pri");
7455 DEFSYM (Qnice
, "nice");
7456 DEFSYM (Qthcount
, "thcount");
7457 DEFSYM (Qstart
, "start");
7458 DEFSYM (Qvsize
, "vsize");
7459 DEFSYM (Qrss
, "rss");
7460 DEFSYM (Qetime
, "etime");
7461 DEFSYM (Qpcpu
, "pcpu");
7462 DEFSYM (Qpmem
, "pmem");
7463 DEFSYM (Qargs
, "args");
7465 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7466 doc
: /* Non-nil means delete processes immediately when they exit.
7467 A value of nil means don't delete them until `list-processes' is run. */);
7469 delete_exited_processes
= 1;
7472 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7473 doc
: /* Control type of device used to communicate with subprocesses.
7474 Values are nil to use a pipe, or t or `pty' to use a pty.
7475 The value has no effect if the system has no ptys or if all ptys are busy:
7476 then a pipe is used in any case.
7477 The value takes effect when `start-process' is called. */);
7478 Vprocess_connection_type
= Qt
;
7480 #ifdef ADAPTIVE_READ_BUFFERING
7481 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7482 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7483 On some systems, when Emacs reads the output from a subprocess, the output data
7484 is read in very small blocks, potentially resulting in very poor performance.
7485 This behavior can be remedied to some extent by setting this variable to a
7486 non-nil value, as it will automatically delay reading from such processes, to
7487 allow them to produce more output before Emacs tries to read it.
7488 If the value is t, the delay is reset after each write to the process; any other
7489 non-nil value means that the delay is not reset on write.
7490 The variable takes effect when `start-process' is called. */);
7491 Vprocess_adaptive_read_buffering
= Qt
;
7494 defsubr (&Sprocessp
);
7495 defsubr (&Sget_process
);
7496 defsubr (&Sdelete_process
);
7497 defsubr (&Sprocess_status
);
7498 defsubr (&Sprocess_exit_status
);
7499 defsubr (&Sprocess_id
);
7500 defsubr (&Sprocess_name
);
7501 defsubr (&Sprocess_tty_name
);
7502 defsubr (&Sprocess_command
);
7503 defsubr (&Sset_process_buffer
);
7504 defsubr (&Sprocess_buffer
);
7505 defsubr (&Sprocess_mark
);
7506 defsubr (&Sset_process_filter
);
7507 defsubr (&Sprocess_filter
);
7508 defsubr (&Sset_process_sentinel
);
7509 defsubr (&Sprocess_sentinel
);
7510 defsubr (&Sset_process_window_size
);
7511 defsubr (&Sset_process_inherit_coding_system_flag
);
7512 defsubr (&Sset_process_query_on_exit_flag
);
7513 defsubr (&Sprocess_query_on_exit_flag
);
7514 defsubr (&Sprocess_contact
);
7515 defsubr (&Sprocess_plist
);
7516 defsubr (&Sset_process_plist
);
7517 defsubr (&Sprocess_list
);
7518 defsubr (&Sstart_process
);
7519 defsubr (&Sserial_process_configure
);
7520 defsubr (&Smake_serial_process
);
7521 defsubr (&Sset_network_process_option
);
7522 defsubr (&Smake_network_process
);
7523 defsubr (&Sformat_network_address
);
7524 #if defined (HAVE_NET_IF_H)
7526 defsubr (&Snetwork_interface_list
);
7528 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7529 defsubr (&Snetwork_interface_info
);
7531 #endif /* defined (HAVE_NET_IF_H) */
7532 #ifdef DATAGRAM_SOCKETS
7533 defsubr (&Sprocess_datagram_address
);
7534 defsubr (&Sset_process_datagram_address
);
7536 defsubr (&Saccept_process_output
);
7537 defsubr (&Sprocess_send_region
);
7538 defsubr (&Sprocess_send_string
);
7539 defsubr (&Sinterrupt_process
);
7540 defsubr (&Skill_process
);
7541 defsubr (&Squit_process
);
7542 defsubr (&Sstop_process
);
7543 defsubr (&Scontinue_process
);
7544 defsubr (&Sprocess_running_child_p
);
7545 defsubr (&Sprocess_send_eof
);
7546 defsubr (&Ssignal_process
);
7547 defsubr (&Swaiting_for_user_input_p
);
7548 defsubr (&Sprocess_type
);
7549 defsubr (&Sset_process_coding_system
);
7550 defsubr (&Sprocess_coding_system
);
7551 defsubr (&Sset_process_filter_multibyte
);
7552 defsubr (&Sprocess_filter_multibyte_p
);
7554 #endif /* subprocesses */
7556 defsubr (&Sget_buffer_process
);
7557 defsubr (&Sprocess_inherit_coding_system_flag
);
7558 defsubr (&Slist_system_processes
);
7559 defsubr (&Sprocess_attributes
);