1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1996, 1998, 1999, 2001, 2002, 2003, 2004,
4 2005, 2006, 2007, 2008, 2009, 2010 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/>. */
25 /* This file is split into two parts by the following preprocessor
26 conditional. The 'then' clause contains all of the support for
27 asynchronous subprocesses. The 'else' clause contains stub
28 versions of some of the asynchronous subprocess routines that are
29 often called elsewhere in Emacs, so we don't have to #ifdef the
30 sections that call them. */
38 #include <sys/types.h> /* some typedefs are used in sys/file.h */
42 #ifdef HAVE_INTTYPES_H
54 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
55 #include <sys/socket.h>
57 #include <netinet/in.h>
58 #include <arpa/inet.h>
60 /* Are local (unix) sockets supported? */
61 #if defined (HAVE_SYS_UN_H)
62 #if !defined (AF_LOCAL) && defined (AF_UNIX)
63 #define AF_LOCAL AF_UNIX
66 #define HAVE_LOCAL_SOCKETS
70 #endif /* HAVE_SOCKETS */
72 #if defined(BSD_SYSTEM)
73 #include <sys/ioctl.h>
74 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
76 #endif /* HAVE_PTYS and no O_NDELAY */
77 #endif /* BSD_SYSTEM */
83 /* Can we use SIOCGIFCONF and/or SIOCGIFADDR */
85 #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H)
86 /* sys/ioctl.h may have been included already */
88 #include <sys/ioctl.h>
99 #include <netinet/in.h>
100 #include <arpa/nameser.h>
110 #include "character.h"
114 #include "termhooks.h"
115 #include "termopts.h"
116 #include "commands.h"
117 #include "keyboard.h"
118 #include "blockinput.h"
119 #include "dispextern.h"
120 #include "composite.h"
123 #if defined (USE_GTK) || defined (HAVE_GCONF)
124 #include "xgselect.h"
125 #endif /* defined (USE_GTK) || defined (HAVE_GCONF) */
127 Lisp_Object Qprocessp
;
128 Lisp_Object Qrun
, Qstop
, Qsignal
;
129 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
130 Lisp_Object Qlocal
, Qipv4
, Qdatagram
, Qseqpacket
;
131 Lisp_Object Qreal
, Qnetwork
, Qserial
;
135 Lisp_Object QCport
, QCspeed
, QCprocess
;
136 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
137 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
138 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
139 Lisp_Object QClocal
, QCremote
, QCcoding
;
140 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
141 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
142 Lisp_Object Qlast_nonmenu_event
;
143 /* QCfamily is declared and initialized in xfaces.c,
144 QCfilter in keyboard.c. */
145 extern Lisp_Object QCfamily
, QCfilter
;
147 /* Qexit is declared and initialized in eval.c. */
149 /* QCfamily is defined in xfaces.c. */
150 extern Lisp_Object QCfamily
;
151 /* QCfilter is defined in keyboard.c. */
152 extern Lisp_Object QCfilter
;
154 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
155 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
156 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
157 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
160 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
161 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
162 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
163 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
165 #define NETCONN_P(p) 0
166 #define NETCONN1_P(p) 0
167 #define SERIALCONN_P(p) 0
168 #define SERIALCONN1_P(p) 0
169 #endif /* HAVE_SOCKETS */
171 /* Define first descriptor number available for subprocesses. */
172 #define FIRST_PROC_DESC 3
174 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
177 #if !defined (SIGCHLD) && defined (SIGCLD)
178 #define SIGCHLD SIGCLD
181 #include "syssignal.h"
185 extern char *get_operating_system_release ();
187 /* Serial processes require termios or Windows. */
188 #if defined (HAVE_TERMIOS) || defined (WINDOWSNT)
193 /* From sysdep.c or w32.c */
194 extern int serial_open (char *port
);
195 extern void serial_configure (struct Lisp_Process
*p
, Lisp_Object contact
);
206 /* t means use pty, nil means use a pipe,
207 maybe other values to come. */
208 static Lisp_Object Vprocess_connection_type
;
210 /* These next two vars are non-static since sysdep.c uses them in the
211 emulation of `select'. */
212 /* Number of events of change of status of a process. */
214 /* Number of events for which the user or sentinel has been notified. */
217 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
219 #ifdef BROKEN_NON_BLOCKING_CONNECT
220 #undef NON_BLOCKING_CONNECT
222 #ifndef NON_BLOCKING_CONNECT
225 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
226 #if defined (O_NONBLOCK) || defined (O_NDELAY)
227 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
228 #define NON_BLOCKING_CONNECT
229 #endif /* EWOULDBLOCK || EINPROGRESS */
230 #endif /* O_NONBLOCK || O_NDELAY */
231 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
232 #endif /* HAVE_SELECT */
233 #endif /* HAVE_SOCKETS */
234 #endif /* NON_BLOCKING_CONNECT */
235 #endif /* BROKEN_NON_BLOCKING_CONNECT */
237 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
238 this system. We need to read full packets, so we need a
239 "non-destructive" select. So we require either native select,
240 or emulation of select using FIONREAD. */
242 #ifdef BROKEN_DATAGRAM_SOCKETS
243 #undef DATAGRAM_SOCKETS
245 #ifndef DATAGRAM_SOCKETS
247 #if defined (HAVE_SELECT) || defined (FIONREAD)
248 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
249 #define DATAGRAM_SOCKETS
250 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
251 #endif /* HAVE_SELECT || FIONREAD */
252 #endif /* HAVE_SOCKETS */
253 #endif /* DATAGRAM_SOCKETS */
254 #endif /* BROKEN_DATAGRAM_SOCKETS */
256 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
257 # define HAVE_SEQPACKET
260 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
261 #ifdef EMACS_HAS_USECS
262 #define ADAPTIVE_READ_BUFFERING
266 #ifdef ADAPTIVE_READ_BUFFERING
267 #define READ_OUTPUT_DELAY_INCREMENT 10000
268 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
269 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
271 /* Number of processes which have a non-zero read_output_delay,
272 and therefore might be delayed for adaptive read buffering. */
274 static int process_output_delay_count
;
276 /* Non-zero if any process has non-nil read_output_skip. */
278 static int process_output_skip
;
280 /* Non-nil means to delay reading process output to improve buffering.
281 A value of t means that delay is reset after each send, any other
282 non-nil value does not reset the delay. A value of nil disables
283 adaptive read buffering completely. */
284 static Lisp_Object Vprocess_adaptive_read_buffering
;
286 #define process_output_delay_count 0
290 #include "sysselect.h"
292 static int keyboard_bit_set
P_ ((SELECT_TYPE
*));
293 static void deactivate_process
P_ ((Lisp_Object
));
294 static void status_notify
P_ ((struct Lisp_Process
*));
295 static int read_process_output
P_ ((Lisp_Object
, int));
296 static void create_pty
P_ ((Lisp_Object
));
298 /* If we support a window system, turn on the code to poll periodically
299 to detect C-g. It isn't actually used when doing interrupt input. */
300 #ifdef HAVE_WINDOW_SYSTEM
301 #define POLL_FOR_INPUT
304 static Lisp_Object
get_process ();
305 static void exec_sentinel ();
307 extern int timers_run
;
309 /* Mask of bits indicating the descriptors that we wait for input on. */
311 static SELECT_TYPE input_wait_mask
;
313 /* Mask that excludes keyboard input descriptor(s). */
315 static SELECT_TYPE non_keyboard_wait_mask
;
317 /* Mask that excludes process input descriptor(s). */
319 static SELECT_TYPE non_process_wait_mask
;
321 /* Mask for the gpm mouse input descriptor. */
323 static SELECT_TYPE gpm_wait_mask
;
325 #ifdef NON_BLOCKING_CONNECT
326 /* Mask of bits indicating the descriptors that we wait for connect to
327 complete on. Once they complete, they are removed from this mask
328 and added to the input_wait_mask and non_keyboard_wait_mask. */
330 static SELECT_TYPE connect_wait_mask
;
332 /* Number of bits set in connect_wait_mask. */
333 static int num_pending_connects
;
335 #define IF_NON_BLOCKING_CONNECT(s) s
337 #define IF_NON_BLOCKING_CONNECT(s)
340 /* The largest descriptor currently in use for a process object. */
341 static int max_process_desc
;
343 /* The largest descriptor currently in use for keyboard input. */
344 static int max_keyboard_desc
;
346 /* The largest descriptor currently in use for gpm mouse input. */
347 static int max_gpm_desc
;
349 /* Non-zero if keyboard input is on hold, zero otherwise. */
350 static int kbd_is_on_hold
;
352 /* Nonzero means delete a process right away if it exits. */
353 static int delete_exited_processes
;
355 /* Indexed by descriptor, gives the process (if any) for that descriptor */
356 Lisp_Object chan_process
[MAXDESC
];
358 /* Alist of elements (NAME . PROCESS) */
359 Lisp_Object Vprocess_alist
;
361 /* Buffered-ahead input char from process, indexed by channel.
362 -1 means empty (no char is buffered).
363 Used on sys V where the only way to tell if there is any
364 output from the process is to read at least one char.
365 Always -1 on systems that support FIONREAD. */
367 /* Don't make static; need to access externally. */
368 int proc_buffered_char
[MAXDESC
];
370 /* Table of `struct coding-system' for each process. */
371 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
372 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
374 #ifdef DATAGRAM_SOCKETS
375 /* Table of `partner address' for datagram sockets. */
376 struct sockaddr_and_len
{
379 } datagram_address
[MAXDESC
];
380 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
381 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
383 #define DATAGRAM_CHAN_P(chan) (0)
384 #define DATAGRAM_CONN_P(proc) (0)
387 /* Maximum number of bytes to send to a pty without an eof. */
388 static int pty_max_bytes
;
390 /* Nonzero means don't run process sentinels. This is used
392 int inhibit_sentinels
;
398 /* The file name of the pty opened by allocate_pty. */
400 static char pty_name
[24];
403 /* Compute the Lisp form of the process status, p->status, from
404 the numeric status that was returned by `wait'. */
406 static Lisp_Object
status_convert (int);
410 struct Lisp_Process
*p
;
412 eassert (p
->raw_status_new
);
413 p
->status
= status_convert (p
->raw_status
);
414 p
->raw_status_new
= 0;
417 /* Convert a process status word in Unix format to
418 the list that we use internally. */
421 status_convert (int w
)
424 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
425 else if (WIFEXITED (w
))
426 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
427 WCOREDUMP (w
) ? Qt
: Qnil
));
428 else if (WIFSIGNALED (w
))
429 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
430 WCOREDUMP (w
) ? Qt
: Qnil
));
435 /* Given a status-list, extract the three pieces of information
436 and store them individually through the three pointers. */
439 decode_status (l
, symbol
, code
, coredump
)
457 *code
= XFASTINT (XCAR (tem
));
459 *coredump
= !NILP (tem
);
463 /* Return a string describing a process status list. */
467 struct Lisp_Process
*p
;
469 Lisp_Object status
= p
->status
;
472 Lisp_Object string
, string2
;
474 decode_status (status
, &symbol
, &code
, &coredump
);
476 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
479 synchronize_system_messages_locale ();
480 signame
= strsignal (code
);
482 string
= build_string ("unknown");
487 string
= make_unibyte_string (signame
, strlen (signame
));
488 if (! NILP (Vlocale_coding_system
))
489 string
= (code_convert_string_norecord
490 (string
, Vlocale_coding_system
, 0));
491 c1
= STRING_CHAR ((char *) SDATA (string
));
494 Faset (string
, make_number (0), make_number (c2
));
496 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
497 return concat2 (string
, string2
);
499 else if (EQ (symbol
, Qexit
))
502 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
504 return build_string ("finished\n");
505 string
= Fnumber_to_string (make_number (code
));
506 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
507 return concat3 (build_string ("exited abnormally with code "),
510 else if (EQ (symbol
, Qfailed
))
512 string
= Fnumber_to_string (make_number (code
));
513 string2
= build_string ("\n");
514 return concat3 (build_string ("failed with code "),
518 return Fcopy_sequence (Fsymbol_name (symbol
));
523 /* Open an available pty, returning a file descriptor.
524 Return -1 on failure.
525 The file name of the terminal corresponding to the pty
526 is left in the variable pty_name. */
537 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
538 for (i
= 0; i
< 16; i
++)
541 struct stat stb
; /* Used in some PTY_OPEN. */
542 #ifdef PTY_NAME_SPRINTF
545 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
546 #endif /* no PTY_NAME_SPRINTF */
550 #else /* no PTY_OPEN */
552 { /* Some systems name their pseudoterminals so that there are gaps in
553 the usual sequence - for example, on HP9000/S700 systems, there
554 are no pseudoterminals with names ending in 'f'. So we wait for
555 three failures in a row before deciding that we've reached the
557 int failed_count
= 0;
559 if (stat (pty_name
, &stb
) < 0)
562 if (failed_count
>= 3)
569 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
571 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
574 #endif /* no PTY_OPEN */
578 /* check to make certain that both sides are available
579 this avoids a nasty yet stupid bug in rlogins */
580 #ifdef PTY_TTY_NAME_SPRINTF
583 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
584 #endif /* no PTY_TTY_NAME_SPRINTF */
585 if (access (pty_name
, 6) != 0)
600 #endif /* HAVE_PTYS */
606 register Lisp_Object val
, tem
, name1
;
607 register struct Lisp_Process
*p
;
611 p
= allocate_process ();
619 p
->raw_status_new
= 0;
621 p
->mark
= Fmake_marker ();
622 p
->kill_without_query
= 0;
624 #ifdef ADAPTIVE_READ_BUFFERING
625 p
->adaptive_read_buffering
= 0;
626 p
->read_output_delay
= 0;
627 p
->read_output_skip
= 0;
630 /* If name is already in use, modify it until it is unused. */
635 tem
= Fget_process (name1
);
636 if (NILP (tem
)) break;
637 sprintf (suffix
, "<%d>", i
);
638 name1
= concat2 (name
, build_string (suffix
));
642 XSETPROCESS (val
, p
);
643 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
648 remove_process (proc
)
649 register Lisp_Object proc
;
651 register Lisp_Object pair
;
653 pair
= Frassq (proc
, Vprocess_alist
);
654 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
656 deactivate_process (proc
);
659 /* Setup coding systems of PROCESS. */
662 setup_process_coding_systems (process
)
665 struct Lisp_Process
*p
= XPROCESS (process
);
667 int outch
= p
->outfd
;
668 Lisp_Object coding_system
;
670 if (inch
< 0 || outch
< 0)
673 if (!proc_decode_coding_system
[inch
])
674 proc_decode_coding_system
[inch
]
675 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
676 coding_system
= p
->decode_coding_system
;
677 if (! NILP (p
->filter
))
679 else if (BUFFERP (p
->buffer
))
681 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
682 coding_system
= raw_text_coding_system (coding_system
);
684 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
686 if (!proc_encode_coding_system
[outch
])
687 proc_encode_coding_system
[outch
]
688 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
689 setup_coding_system (p
->encode_coding_system
,
690 proc_encode_coding_system
[outch
]);
693 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
694 doc
: /* Return t if OBJECT is a process. */)
698 return PROCESSP (object
) ? Qt
: Qnil
;
701 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
702 doc
: /* Return the process named NAME, or nil if there is none. */)
704 register Lisp_Object name
;
709 return Fcdr (Fassoc (name
, Vprocess_alist
));
712 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
713 doc
: /* Return the (or a) process associated with BUFFER.
714 BUFFER may be a buffer or the name of one. */)
716 register Lisp_Object buffer
;
718 register Lisp_Object buf
, tail
, proc
;
720 if (NILP (buffer
)) return Qnil
;
721 buf
= Fget_buffer (buffer
);
722 if (NILP (buf
)) return Qnil
;
724 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
726 proc
= Fcdr (XCAR (tail
));
727 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
733 /* This is how commands for the user decode process arguments. It
734 accepts a process, a process name, a buffer, a buffer name, or nil.
735 Buffers denote the first process in the buffer, and nil denotes the
740 register Lisp_Object name
;
742 register Lisp_Object proc
, obj
;
745 obj
= Fget_process (name
);
747 obj
= Fget_buffer (name
);
749 error ("Process %s does not exist", SDATA (name
));
751 else if (NILP (name
))
752 obj
= Fcurrent_buffer ();
756 /* Now obj should be either a buffer object or a process object.
760 proc
= Fget_buffer_process (obj
);
762 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
774 /* Fdelete_process promises to immediately forget about the process, but in
775 reality, Emacs needs to remember those processes until they have been
776 treated by sigchld_handler; otherwise this handler would consider the
777 process as being synchronous and say that the synchronous process is
779 static Lisp_Object deleted_pid_list
;
782 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
783 doc
: /* Delete PROCESS: kill it and forget about it immediately.
784 PROCESS may be a process, a buffer, the name of a process or buffer, or
785 nil, indicating the current buffer's process. */)
787 register Lisp_Object process
;
789 register struct Lisp_Process
*p
;
791 process
= get_process (process
);
792 p
= XPROCESS (process
);
794 p
->raw_status_new
= 0;
795 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
797 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
798 p
->tick
= ++process_tick
;
800 redisplay_preserve_echo_area (13);
802 else if (p
->infd
>= 0)
806 /* Assignment to EMACS_INT stops GCC whining about limited range
808 EMACS_INT pid
= p
->pid
;
810 /* No problem storing the pid here, as it is still in Vprocess_alist. */
811 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
812 /* GC treated elements set to nil. */
813 Fdelq (Qnil
, deleted_pid_list
));
814 /* If the process has already signaled, remove it from the list. */
815 if (p
->raw_status_new
)
818 if (CONSP (p
->status
))
819 symbol
= XCAR (p
->status
);
820 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
822 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
826 Fkill_process (process
, Qnil
);
827 /* Do this now, since remove_process will make sigchld_handler do nothing. */
829 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
830 p
->tick
= ++process_tick
;
832 redisplay_preserve_echo_area (13);
835 remove_process (process
);
839 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
840 doc
: /* Return the status of PROCESS.
841 The returned value is one of the following symbols:
842 run -- for a process that is running.
843 stop -- for a process stopped but continuable.
844 exit -- for a process that has exited.
845 signal -- for a process that has got a fatal signal.
846 open -- for a network stream connection that is open.
847 listen -- for a network stream server that is listening.
848 closed -- for a network stream connection that is closed.
849 connect -- when waiting for a non-blocking connection to complete.
850 failed -- when a non-blocking connection has failed.
851 nil -- if arg is a process name and no such process exists.
852 PROCESS may be a process, a buffer, the name of a process, or
853 nil, indicating the current buffer's process. */)
855 register Lisp_Object process
;
857 register struct Lisp_Process
*p
;
858 register Lisp_Object status
;
860 if (STRINGP (process
))
861 process
= Fget_process (process
);
863 process
= get_process (process
);
868 p
= XPROCESS (process
);
869 if (p
->raw_status_new
)
873 status
= XCAR (status
);
874 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
876 if (EQ (status
, Qexit
))
878 else if (EQ (p
->command
, Qt
))
880 else if (EQ (status
, Qrun
))
886 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
888 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
889 If PROCESS has not yet exited or died, return 0. */)
891 register Lisp_Object process
;
893 CHECK_PROCESS (process
);
894 if (XPROCESS (process
)->raw_status_new
)
895 update_status (XPROCESS (process
));
896 if (CONSP (XPROCESS (process
)->status
))
897 return XCAR (XCDR (XPROCESS (process
)->status
));
898 return make_number (0);
901 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
902 doc
: /* Return the process id of PROCESS.
903 This is the pid of the external process which PROCESS uses or talks to.
904 For a network connection, this value is nil. */)
906 register Lisp_Object process
;
908 /* Assignment to EMACS_INT stops GCC whining about limited range of
912 CHECK_PROCESS (process
);
913 pid
= XPROCESS (process
)->pid
;
914 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
917 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
918 doc
: /* Return the name of PROCESS, as a string.
919 This is the name of the program invoked in PROCESS,
920 possibly modified to make it unique among process names. */)
922 register Lisp_Object process
;
924 CHECK_PROCESS (process
);
925 return XPROCESS (process
)->name
;
928 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
929 doc
: /* Return the command that was executed to start PROCESS.
930 This is a list of strings, the first string being the program executed
931 and the rest of the strings being the arguments given to it.
932 For a network or serial process, this is nil (process is running) or t
933 \(process is stopped). */)
935 register Lisp_Object process
;
937 CHECK_PROCESS (process
);
938 return XPROCESS (process
)->command
;
941 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
942 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
943 This is the terminal that the process itself reads and writes on,
944 not the name of the pty that Emacs uses to talk with that terminal. */)
946 register Lisp_Object process
;
948 CHECK_PROCESS (process
);
949 return XPROCESS (process
)->tty_name
;
952 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
954 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
956 register Lisp_Object process
, buffer
;
958 struct Lisp_Process
*p
;
960 CHECK_PROCESS (process
);
962 CHECK_BUFFER (buffer
);
963 p
= XPROCESS (process
);
965 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
966 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
967 setup_process_coding_systems (process
);
971 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
973 doc
: /* Return the buffer PROCESS is associated with.
974 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
976 register Lisp_Object process
;
978 CHECK_PROCESS (process
);
979 return XPROCESS (process
)->buffer
;
982 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
984 doc
: /* Return the marker for the end of the last output from PROCESS. */)
986 register Lisp_Object process
;
988 CHECK_PROCESS (process
);
989 return XPROCESS (process
)->mark
;
992 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
994 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
995 A value of t means stop accepting output from the process.
997 When a process has a filter, its buffer is not used for output.
998 Instead, each time it does output, the entire string of output is
999 passed to the filter.
1001 The filter gets two arguments: the process and the string of output.
1002 The string argument is normally a multibyte string, except:
1003 - if the process' input coding system is no-conversion or raw-text,
1004 it is a unibyte string (the non-converted input), or else
1005 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1006 string (the result of converting the decoded input multibyte
1007 string to unibyte with `string-make-unibyte'). */)
1009 register Lisp_Object process
, filter
;
1011 struct Lisp_Process
*p
;
1013 CHECK_PROCESS (process
);
1014 p
= XPROCESS (process
);
1016 /* Don't signal an error if the process' input file descriptor
1017 is closed. This could make debugging Lisp more difficult,
1018 for example when doing something like
1020 (setq process (start-process ...))
1022 (set-process-filter process ...) */
1026 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1028 FD_CLR (p
->infd
, &input_wait_mask
);
1029 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1031 else if (EQ (p
->filter
, Qt
)
1032 /* Network or serial process not stopped: */
1033 && !EQ (p
->command
, Qt
))
1035 FD_SET (p
->infd
, &input_wait_mask
);
1036 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1041 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1042 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1043 setup_process_coding_systems (process
);
1047 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1049 doc
: /* Returns the filter function of PROCESS; nil if none.
1050 See `set-process-filter' for more info on filter functions. */)
1052 register Lisp_Object process
;
1054 CHECK_PROCESS (process
);
1055 return XPROCESS (process
)->filter
;
1058 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1060 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1061 The sentinel is called as a function when the process changes state.
1062 It gets two arguments: the process, and a string describing the change. */)
1064 register Lisp_Object process
, sentinel
;
1066 struct Lisp_Process
*p
;
1068 CHECK_PROCESS (process
);
1069 p
= XPROCESS (process
);
1071 p
->sentinel
= sentinel
;
1072 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1073 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1077 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1079 doc
: /* Return the sentinel of PROCESS; nil if none.
1080 See `set-process-sentinel' for more info on sentinels. */)
1082 register Lisp_Object process
;
1084 CHECK_PROCESS (process
);
1085 return XPROCESS (process
)->sentinel
;
1088 DEFUN ("set-process-window-size", Fset_process_window_size
,
1089 Sset_process_window_size
, 3, 3, 0,
1090 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1091 (process
, height
, width
)
1092 register Lisp_Object process
, height
, width
;
1094 CHECK_PROCESS (process
);
1095 CHECK_NATNUM (height
);
1096 CHECK_NATNUM (width
);
1098 if (XPROCESS (process
)->infd
< 0
1099 || set_window_size (XPROCESS (process
)->infd
,
1100 XINT (height
), XINT (width
)) <= 0)
1106 DEFUN ("set-process-inherit-coding-system-flag",
1107 Fset_process_inherit_coding_system_flag
,
1108 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1109 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1110 If the second argument FLAG is non-nil, then the variable
1111 `buffer-file-coding-system' of the buffer associated with PROCESS
1112 will be bound to the value of the coding system used to decode
1115 This is useful when the coding system specified for the process buffer
1116 leaves either the character code conversion or the end-of-line conversion
1117 unspecified, or if the coding system used to decode the process output
1118 is more appropriate for saving the process buffer.
1120 Binding the variable `inherit-process-coding-system' to non-nil before
1121 starting the process is an alternative way of setting the inherit flag
1122 for the process which will run. */)
1124 register Lisp_Object process
, flag
;
1126 CHECK_PROCESS (process
);
1127 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1131 DEFUN ("process-inherit-coding-system-flag",
1132 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1134 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1135 If this flag is t, `buffer-file-coding-system' of the buffer
1136 associated with PROCESS will inherit the coding system used to decode
1137 the process output. */)
1139 register Lisp_Object process
;
1141 CHECK_PROCESS (process
);
1142 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
1145 DEFUN ("set-process-query-on-exit-flag",
1146 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1148 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1149 If the second argument FLAG is non-nil, Emacs will query the user before
1150 exiting or killing a buffer if PROCESS is running. */)
1152 register Lisp_Object process
, flag
;
1154 CHECK_PROCESS (process
);
1155 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1159 DEFUN ("process-query-on-exit-flag",
1160 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1162 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1164 register Lisp_Object process
;
1166 CHECK_PROCESS (process
);
1167 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1170 #ifdef DATAGRAM_SOCKETS
1171 Lisp_Object
Fprocess_datagram_address ();
1174 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1176 doc
: /* Return the contact info of PROCESS; t for a real child.
1177 For a network or serial connection, the value depends on the optional
1178 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1179 SERVICE) for a network connection or (PORT SPEED) for a serial
1180 connection. If KEY is t, the complete contact information for the
1181 connection is returned, else the specific value for the keyword KEY is
1182 returned. See `make-network-process' or `make-serial-process' for a
1183 list of keywords. */)
1185 register Lisp_Object process
, key
;
1187 Lisp_Object contact
;
1189 CHECK_PROCESS (process
);
1190 contact
= XPROCESS (process
)->childp
;
1192 #ifdef DATAGRAM_SOCKETS
1193 if (DATAGRAM_CONN_P (process
)
1194 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1195 contact
= Fplist_put (contact
, QCremote
,
1196 Fprocess_datagram_address (process
));
1199 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1201 if (NILP (key
) && NETCONN_P (process
))
1202 return Fcons (Fplist_get (contact
, QChost
),
1203 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1204 if (NILP (key
) && SERIALCONN_P (process
))
1205 return Fcons (Fplist_get (contact
, QCport
),
1206 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1207 return Fplist_get (contact
, key
);
1210 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1212 doc
: /* Return the plist of PROCESS. */)
1214 register Lisp_Object process
;
1216 CHECK_PROCESS (process
);
1217 return XPROCESS (process
)->plist
;
1220 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1222 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1224 register Lisp_Object process
, plist
;
1226 CHECK_PROCESS (process
);
1229 XPROCESS (process
)->plist
= plist
;
1233 #if 0 /* Turned off because we don't currently record this info
1234 in the process. Perhaps add it. */
1235 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1236 doc
: /* Return the connection type of PROCESS.
1237 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1238 a socket connection. */)
1240 Lisp_Object process
;
1242 return XPROCESS (process
)->type
;
1246 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1247 doc
: /* Return the connection type of PROCESS.
1248 The value is either the symbol `real', `network', or `serial'.
1249 PROCESS may be a process, a buffer, the name of a process or buffer, or
1250 nil, indicating the current buffer's process. */)
1252 Lisp_Object process
;
1255 proc
= get_process (process
);
1256 return XPROCESS (proc
)->type
;
1260 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1262 doc
: /* Convert network ADDRESS from internal format to a string.
1263 A 4 or 5 element vector represents an IPv4 address (with port number).
1264 An 8 or 9 element vector represents an IPv6 address (with port number).
1265 If optional second argument OMIT-PORT is non-nil, don't include a port
1266 number in the string, even when present in ADDRESS.
1267 Returns nil if format of ADDRESS is invalid. */)
1268 (address
, omit_port
)
1269 Lisp_Object address
, omit_port
;
1274 if (STRINGP (address
)) /* AF_LOCAL */
1277 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1279 register struct Lisp_Vector
*p
= XVECTOR (address
);
1280 Lisp_Object args
[10];
1283 if (p
->size
== 4 || (p
->size
== 5 && !NILP (omit_port
)))
1285 args
[0] = build_string ("%d.%d.%d.%d");
1288 else if (p
->size
== 5)
1290 args
[0] = build_string ("%d.%d.%d.%d:%d");
1293 else if (p
->size
== 8 || (p
->size
== 9 && !NILP (omit_port
)))
1295 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1298 else if (p
->size
== 9)
1300 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1306 for (i
= 0; i
< nargs
; i
++)
1308 EMACS_INT element
= XINT (p
->contents
[i
]);
1310 if (element
< 0 || element
> 65535)
1313 if (nargs
<= 5 /* IPv4 */
1314 && i
< 4 /* host, not port */
1318 args
[i
+1] = p
->contents
[i
];
1321 return Fformat (nargs
+1, args
);
1324 if (CONSP (address
))
1326 Lisp_Object args
[2];
1327 args
[0] = build_string ("<Family %d>");
1328 args
[1] = Fcar (address
);
1329 return Fformat (2, args
);
1337 list_processes_1 (query_only
)
1338 Lisp_Object query_only
;
1340 register Lisp_Object tail
, tem
;
1341 Lisp_Object proc
, minspace
, tem1
;
1342 register struct Lisp_Process
*p
;
1344 int w_proc
, w_buffer
, w_tty
;
1346 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1348 w_proc
= 4; /* Proc */
1349 w_buffer
= 6; /* Buffer */
1350 w_tty
= 0; /* Omit if no ttys */
1352 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
1356 proc
= Fcdr (XCAR (tail
));
1357 p
= XPROCESS (proc
);
1360 if (!NILP (query_only
) && p
->kill_without_query
)
1362 if (STRINGP (p
->name
)
1363 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1365 if (!NILP (p
->buffer
))
1367 if (NILP (XBUFFER (p
->buffer
)->name
))
1370 w_buffer
= 8; /* (Killed) */
1372 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1375 if (STRINGP (p
->tty_name
)
1376 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1380 XSETFASTINT (i_status
, w_proc
+ 1);
1381 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1384 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1385 XSETFASTINT (i_command
, XFASTINT (i_tty
) + w_tty
+ 1);
1390 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1393 XSETFASTINT (minspace
, 1);
1395 set_buffer_internal (XBUFFER (Vstandard_output
));
1396 current_buffer
->undo_list
= Qt
;
1398 current_buffer
->truncate_lines
= Qt
;
1400 write_string ("Proc", -1);
1401 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1402 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1405 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1407 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1408 write_string ("\n", -1);
1410 write_string ("----", -1);
1411 Findent_to (i_status
, minspace
); write_string ("------", -1);
1412 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1415 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1417 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1418 write_string ("\n", -1);
1420 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
1424 proc
= Fcdr (XCAR (tail
));
1425 p
= XPROCESS (proc
);
1428 if (!NILP (query_only
) && p
->kill_without_query
)
1431 Finsert (1, &p
->name
);
1432 Findent_to (i_status
, minspace
);
1434 if (p
->raw_status_new
)
1437 if (CONSP (p
->status
))
1438 symbol
= XCAR (p
->status
);
1440 if (EQ (symbol
, Qsignal
))
1443 tem
= Fcar (Fcdr (p
->status
));
1444 Fprinc (symbol
, Qnil
);
1446 else if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1448 if (EQ (symbol
, Qexit
))
1449 write_string ("closed", -1);
1450 else if (EQ (p
->command
, Qt
))
1451 write_string ("stopped", -1);
1452 else if (EQ (symbol
, Qrun
))
1453 write_string ("open", -1);
1455 Fprinc (symbol
, Qnil
);
1457 else if (SERIALCONN1_P (p
))
1459 write_string ("running", -1);
1462 Fprinc (symbol
, Qnil
);
1464 if (EQ (symbol
, Qexit
))
1467 tem
= Fcar (Fcdr (p
->status
));
1470 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1471 write_string (tembuf
, -1);
1475 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
) || EQ (symbol
, Qclosed
))
1478 Findent_to (i_buffer
, minspace
);
1479 if (NILP (p
->buffer
))
1480 insert_string ("(none)");
1481 else if (NILP (XBUFFER (p
->buffer
)->name
))
1482 insert_string ("(Killed)");
1484 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1488 Findent_to (i_tty
, minspace
);
1489 if (STRINGP (p
->tty_name
))
1490 Finsert (1, &p
->tty_name
);
1493 Findent_to (i_command
, minspace
);
1495 if (EQ (p
->status
, Qlisten
))
1497 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1498 if (INTEGERP (port
))
1499 port
= Fnumber_to_string (port
);
1501 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1502 sprintf (tembuf
, "(network %s server on %s)\n",
1503 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1504 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1505 insert_string (tembuf
);
1507 else if (NETCONN1_P (p
))
1509 /* For a local socket, there is no host name,
1510 so display service instead. */
1511 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1512 if (!STRINGP (host
))
1514 host
= Fplist_get (p
->childp
, QCservice
);
1515 if (INTEGERP (host
))
1516 host
= Fnumber_to_string (host
);
1519 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1520 sprintf (tembuf
, "(network %s connection to %s)\n",
1521 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1522 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1523 insert_string (tembuf
);
1525 else if (SERIALCONN1_P (p
))
1527 Lisp_Object port
= Fplist_get (p
->childp
, QCport
);
1528 Lisp_Object speed
= Fplist_get (p
->childp
, QCspeed
);
1529 insert_string ("(serial port ");
1531 insert_string (SDATA (port
));
1533 insert_string ("?");
1534 if (INTEGERP (speed
))
1536 sprintf (tembuf
, " at %ld b/s", (long) XINT (speed
));
1537 insert_string (tembuf
);
1539 insert_string (")\n");
1553 insert_string (" ");
1555 insert_string ("\n");
1560 status_notify (NULL
);
1561 redisplay_preserve_echo_area (13);
1566 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1567 doc
: /* Display a list of all processes.
1568 If optional argument QUERY-ONLY is non-nil, only processes with
1569 the query-on-exit flag set will be listed.
1570 Any process listed as exited or signaled is actually eliminated
1571 after the listing is made. */)
1573 Lisp_Object query_only
;
1575 internal_with_output_to_temp_buffer ("*Process List*",
1576 list_processes_1
, query_only
);
1580 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1581 doc
: /* Return a list of all processes. */)
1584 return Fmapcar (Qcdr
, Vprocess_alist
);
1587 /* Starting asynchronous inferior processes. */
1589 static Lisp_Object
start_process_unwind ();
1591 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1592 doc
: /* Start a program in a subprocess. Return the process object for it.
1593 NAME is name for process. It is modified if necessary to make it unique.
1594 BUFFER is the buffer (or buffer name) to associate with the process.
1596 Process output (both standard output and standard error streams) goes
1597 at end of BUFFER, unless you specify an output stream or filter
1598 function to handle the output. BUFFER may also be nil, meaning that
1599 this process is not associated with any buffer.
1601 PROGRAM is the program file name. It is searched for in PATH. If
1602 nil, just associate a pty with the buffer. Remaining arguments are
1603 strings to give program as arguments.
1605 If you want to separate standard output from standard error, invoke
1606 the command through a shell and redirect one of them using the shell
1609 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1612 register Lisp_Object
*args
;
1614 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1615 register unsigned char **new_argv
;
1617 int count
= SPECPDL_INDEX ();
1621 buffer
= Fget_buffer_create (buffer
);
1623 /* Make sure that the child will be able to chdir to the current
1624 buffer's current directory, or its unhandled equivalent. We
1625 can't just have the child check for an error when it does the
1626 chdir, since it's in a vfork.
1628 We have to GCPRO around this because Fexpand_file_name and
1629 Funhandled_file_name_directory might call a file name handling
1630 function. The argument list is protected by the caller, so all
1631 we really have to worry about is buffer. */
1633 struct gcpro gcpro1
, gcpro2
;
1635 current_dir
= current_buffer
->directory
;
1637 GCPRO2 (buffer
, current_dir
);
1639 current_dir
= Funhandled_file_name_directory (current_dir
);
1640 if (NILP (current_dir
))
1641 /* If the file name handler says that current_dir is unreachable, use
1642 a sensible default. */
1643 current_dir
= build_string ("~/");
1644 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1645 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1646 report_file_error ("Setting current directory",
1647 Fcons (current_buffer
->directory
, Qnil
));
1653 CHECK_STRING (name
);
1657 if (!NILP (program
))
1658 CHECK_STRING (program
);
1660 proc
= make_process (name
);
1661 /* If an error occurs and we can't start the process, we want to
1662 remove it from the process list. This means that each error
1663 check in create_process doesn't need to call remove_process
1664 itself; it's all taken care of here. */
1665 record_unwind_protect (start_process_unwind
, proc
);
1667 XPROCESS (proc
)->childp
= Qt
;
1668 XPROCESS (proc
)->plist
= Qnil
;
1669 XPROCESS (proc
)->type
= Qreal
;
1670 XPROCESS (proc
)->buffer
= buffer
;
1671 XPROCESS (proc
)->sentinel
= Qnil
;
1672 XPROCESS (proc
)->filter
= Qnil
;
1673 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1675 #ifdef ADAPTIVE_READ_BUFFERING
1676 XPROCESS (proc
)->adaptive_read_buffering
1677 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1678 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1681 /* Make the process marker point into the process buffer (if any). */
1682 if (BUFFERP (buffer
))
1683 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1684 BUF_ZV (XBUFFER (buffer
)),
1685 BUF_ZV_BYTE (XBUFFER (buffer
)));
1688 /* Decide coding systems for communicating with the process. Here
1689 we don't setup the structure coding_system nor pay attention to
1690 unibyte mode. They are done in create_process. */
1692 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1693 Lisp_Object coding_systems
= Qt
;
1694 Lisp_Object val
, *args2
;
1695 struct gcpro gcpro1
, gcpro2
;
1697 val
= Vcoding_system_for_read
;
1700 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1701 args2
[0] = Qstart_process
;
1702 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1703 GCPRO2 (proc
, current_dir
);
1704 if (!NILP (program
))
1705 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1707 if (CONSP (coding_systems
))
1708 val
= XCAR (coding_systems
);
1709 else if (CONSP (Vdefault_process_coding_system
))
1710 val
= XCAR (Vdefault_process_coding_system
);
1712 XPROCESS (proc
)->decode_coding_system
= val
;
1714 val
= Vcoding_system_for_write
;
1717 if (EQ (coding_systems
, Qt
))
1719 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1720 args2
[0] = Qstart_process
;
1721 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1722 GCPRO2 (proc
, current_dir
);
1723 if (!NILP (program
))
1724 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1727 if (CONSP (coding_systems
))
1728 val
= XCDR (coding_systems
);
1729 else if (CONSP (Vdefault_process_coding_system
))
1730 val
= XCDR (Vdefault_process_coding_system
);
1732 XPROCESS (proc
)->encode_coding_system
= val
;
1733 /* Note: At this momemnt, the above coding system may leave
1734 text-conversion or eol-conversion unspecified. They will be
1735 decided after we read output from the process and decode it by
1736 some coding system, or just before we actually send a text to
1741 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1742 XPROCESS (proc
)->decoding_carryover
= 0;
1743 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1745 XPROCESS (proc
)->inherit_coding_system_flag
1746 = !(NILP (buffer
) || !inherit_process_coding_system
);
1748 if (!NILP (program
))
1750 /* If program file name is not absolute, search our path for it.
1751 Put the name we will really use in TEM. */
1752 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1753 && !(SCHARS (program
) > 1
1754 && IS_DEVICE_SEP (SREF (program
, 1))))
1756 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1759 GCPRO4 (name
, program
, buffer
, current_dir
);
1760 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1763 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1764 tem
= Fexpand_file_name (tem
, Qnil
);
1768 if (!NILP (Ffile_directory_p (program
)))
1769 error ("Specified program for new process is a directory");
1773 /* If program file name starts with /: for quoting a magic name,
1775 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1776 && SREF (tem
, 1) == ':')
1777 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1780 Lisp_Object arg_encoding
= Qnil
;
1781 struct gcpro gcpro1
;
1784 /* Encode the file name and put it in NEW_ARGV.
1785 That's where the child will use it to execute the program. */
1786 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1788 /* Here we encode arguments by the coding system used for sending
1789 data to the process. We don't support using different coding
1790 systems for encoding arguments and for encoding data sent to the
1793 for (i
= 3; i
< nargs
; i
++)
1795 tem
= Fcons (args
[i
], tem
);
1796 CHECK_STRING (XCAR (tem
));
1797 if (STRING_MULTIBYTE (XCAR (tem
)))
1799 if (NILP (arg_encoding
))
1800 arg_encoding
= (complement_process_encoding_system
1801 (XPROCESS (proc
)->encode_coding_system
));
1803 code_convert_string_norecord
1804 (XCAR (tem
), arg_encoding
, 1));
1811 /* Now that everything is encoded we can collect the strings into
1813 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1814 new_argv
[nargs
- 2] = 0;
1816 for (i
= nargs
- 3; i
>= 0; i
--)
1818 new_argv
[i
] = SDATA (XCAR (tem
));
1822 create_process (proc
, (char **) new_argv
, current_dir
);
1827 return unbind_to (count
, proc
);
1830 /* This function is the unwind_protect form for Fstart_process. If
1831 PROC doesn't have its pid set, then we know someone has signaled
1832 an error and the process wasn't started successfully, so we should
1833 remove it from the process list. */
1835 start_process_unwind (proc
)
1838 if (!PROCESSP (proc
))
1841 /* Was PROC started successfully? */
1842 if (XPROCESS (proc
)->pid
== -1)
1843 remove_process (proc
);
1849 create_process_1 (timer
)
1850 struct atimer
*timer
;
1852 /* Nothing to do. */
1856 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1859 /* Mimic blocking of signals on system V, which doesn't really have it. */
1861 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1862 int sigchld_deferred
;
1865 create_process_sigchld ()
1867 signal (SIGCHLD
, create_process_sigchld
);
1869 sigchld_deferred
= 1;
1876 create_process (process
, new_argv
, current_dir
)
1877 Lisp_Object process
;
1879 Lisp_Object current_dir
;
1881 int inchannel
, outchannel
;
1884 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1885 int wait_child_setup
[2];
1887 #ifdef POSIX_SIGNALS
1890 struct sigaction sigint_action
;
1891 struct sigaction sigquit_action
;
1893 struct sigaction sighup_action
;
1895 #else /* !POSIX_SIGNALS */
1898 SIGTYPE (*sigchld
)();
1901 #endif /* !POSIX_SIGNALS */
1902 /* Use volatile to protect variables from being clobbered by longjmp. */
1903 volatile int forkin
, forkout
;
1904 volatile int pty_flag
= 0;
1906 extern char **environ
;
1909 inchannel
= outchannel
= -1;
1912 if (!NILP (Vprocess_connection_type
))
1913 outchannel
= inchannel
= allocate_pty ();
1917 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1918 /* On most USG systems it does not work to open the pty's tty here,
1919 then close it and reopen it in the child. */
1921 /* Don't let this terminal become our controlling terminal
1922 (in case we don't have one). */
1923 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1925 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1928 report_file_error ("Opening pty", Qnil
);
1930 forkin
= forkout
= -1;
1931 #endif /* not USG, or USG_SUBTTY_WORKS */
1935 #endif /* HAVE_PTYS */
1940 report_file_error ("Creating pipe", Qnil
);
1946 emacs_close (inchannel
);
1947 emacs_close (forkout
);
1948 report_file_error ("Creating pipe", Qnil
);
1954 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1958 tem
= pipe (wait_child_setup
);
1960 report_file_error ("Creating pipe", Qnil
);
1961 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1963 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1966 emacs_close (wait_child_setup
[0]);
1967 emacs_close (wait_child_setup
[1]);
1968 report_file_error ("Setting file descriptor flags", Qnil
);
1974 /* Replaced by close_process_descs */
1975 set_exclusive_use (inchannel
);
1976 set_exclusive_use (outchannel
);
1980 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1981 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1984 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1985 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1989 /* Record this as an active process, with its channels.
1990 As a result, child_setup will close Emacs's side of the pipes. */
1991 chan_process
[inchannel
] = process
;
1992 XPROCESS (process
)->infd
= inchannel
;
1993 XPROCESS (process
)->outfd
= outchannel
;
1995 /* Previously we recorded the tty descriptor used in the subprocess.
1996 It was only used for getting the foreground tty process, so now
1997 we just reopen the device (see emacs_get_tty_pgrp) as this is
1998 more portable (see USG_SUBTTY_WORKS above). */
2000 XPROCESS (process
)->pty_flag
= pty_flag
;
2001 XPROCESS (process
)->status
= Qrun
;
2002 setup_process_coding_systems (process
);
2004 /* Delay interrupts until we have a chance to store
2005 the new fork's pid in its process structure */
2006 #ifdef POSIX_SIGNALS
2007 sigemptyset (&blocked
);
2009 sigaddset (&blocked
, SIGCHLD
);
2011 #ifdef HAVE_WORKING_VFORK
2012 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
2013 this sets the parent's signal handlers as well as the child's.
2014 So delay all interrupts whose handlers the child might munge,
2015 and record the current handlers so they can be restored later. */
2016 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
2017 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
2019 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
2021 #endif /* HAVE_WORKING_VFORK */
2022 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
2023 #else /* !POSIX_SIGNALS */
2025 #if defined (BSD_SYSTEM) || defined (HPUX)
2026 sigsetmask (sigmask (SIGCHLD
));
2027 #else /* ordinary USG */
2029 sigchld_deferred
= 0;
2030 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
2032 #endif /* ordinary USG */
2033 #endif /* SIGCHLD */
2034 #endif /* !POSIX_SIGNALS */
2036 FD_SET (inchannel
, &input_wait_mask
);
2037 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2038 if (inchannel
> max_process_desc
)
2039 max_process_desc
= inchannel
;
2041 /* Until we store the proper pid, enable sigchld_handler
2042 to recognize an unknown pid as standing for this process.
2043 It is very important not to let this `marker' value stay
2044 in the table after this function has returned; if it does
2045 it might cause call-process to hang and subsequent asynchronous
2046 processes to get their return values scrambled. */
2047 XPROCESS (process
)->pid
= -1;
2052 /* child_setup must clobber environ on systems with true vfork.
2053 Protect it from permanent change. */
2054 char **save_environ
= environ
;
2056 current_dir
= ENCODE_FILE (current_dir
);
2061 #endif /* not WINDOWSNT */
2063 int xforkin
= forkin
;
2064 int xforkout
= forkout
;
2066 #if 0 /* This was probably a mistake--it duplicates code later on,
2067 but fails to handle all the cases. */
2068 /* Make sure SIGCHLD is not blocked in the child. */
2069 sigsetmask (SIGEMPTYMASK
);
2072 /* Make the pty be the controlling terminal of the process. */
2074 /* First, disconnect its current controlling terminal. */
2076 /* We tried doing setsid only if pty_flag, but it caused
2077 process_set_signal to fail on SGI when using a pipe. */
2079 /* Make the pty's terminal the controlling terminal. */
2083 /* We ignore the return value
2084 because faith@cs.unc.edu says that is necessary on Linux. */
2085 ioctl (xforkin
, TIOCSCTTY
, 0);
2088 #else /* not HAVE_SETSID */
2090 /* It's very important to call setpgrp here and no time
2091 afterwards. Otherwise, we lose our controlling tty which
2092 is set when we open the pty. */
2095 #endif /* not HAVE_SETSID */
2096 #if defined (HAVE_TERMIOS) && defined (LDISC1)
2097 if (pty_flag
&& xforkin
>= 0)
2100 tcgetattr (xforkin
, &t
);
2102 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
2103 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
2106 #if defined (NTTYDISC) && defined (TIOCSETD)
2107 if (pty_flag
&& xforkin
>= 0)
2109 /* Use new line discipline. */
2110 int ldisc
= NTTYDISC
;
2111 ioctl (xforkin
, TIOCSETD
, &ldisc
);
2116 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
2117 can do TIOCSPGRP only to the process's controlling tty. */
2120 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
2121 I can't test it since I don't have 4.3. */
2122 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
2123 ioctl (j
, TIOCNOTTY
, 0);
2126 /* In order to get a controlling terminal on some versions
2127 of BSD, it is necessary to put the process in pgrp 0
2128 before it opens the terminal. */
2136 #endif /* TIOCNOTTY */
2138 #if !defined (DONT_REOPEN_PTY)
2139 /*** There is a suggestion that this ought to be a
2140 conditional on TIOCSPGRP,
2141 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2142 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2143 that system does seem to need this code, even though
2144 both HAVE_SETSID and TIOCSCTTY are defined. */
2145 /* Now close the pty (if we had it open) and reopen it.
2146 This makes the pty the controlling terminal of the subprocess. */
2150 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2153 emacs_close (xforkin
);
2154 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2158 emacs_write (1, "Couldn't open the pty terminal ", 31);
2159 emacs_write (1, pty_name
, strlen (pty_name
));
2160 emacs_write (1, "\n", 1);
2165 #endif /* not DONT_REOPEN_PTY */
2167 #ifdef SETUP_SLAVE_PTY
2172 #endif /* SETUP_SLAVE_PTY */
2174 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2175 Now reenable it in the child, so it will die when we want it to. */
2177 signal (SIGHUP
, SIG_DFL
);
2179 #endif /* HAVE_PTYS */
2181 signal (SIGINT
, SIG_DFL
);
2182 signal (SIGQUIT
, SIG_DFL
);
2184 /* Stop blocking signals in the child. */
2185 #ifdef POSIX_SIGNALS
2186 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2187 #else /* !POSIX_SIGNALS */
2189 #if defined (BSD_SYSTEM) || defined (HPUX)
2190 sigsetmask (SIGEMPTYMASK
);
2191 #else /* ordinary USG */
2193 signal (SIGCHLD
, sigchld
);
2195 #endif /* ordinary USG */
2196 #endif /* SIGCHLD */
2197 #endif /* !POSIX_SIGNALS */
2200 child_setup_tty (xforkout
);
2202 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2203 new_argv
, 1, current_dir
);
2204 #else /* not WINDOWSNT */
2206 emacs_close (wait_child_setup
[0]);
2208 child_setup (xforkin
, xforkout
, xforkout
,
2209 new_argv
, 1, current_dir
);
2210 #endif /* not WINDOWSNT */
2212 environ
= save_environ
;
2217 /* This runs in the Emacs process. */
2221 emacs_close (forkin
);
2222 if (forkin
!= forkout
&& forkout
>= 0)
2223 emacs_close (forkout
);
2227 /* vfork succeeded. */
2228 XPROCESS (process
)->pid
= pid
;
2231 register_child (pid
, inchannel
);
2232 #endif /* WINDOWSNT */
2234 /* If the subfork execv fails, and it exits,
2235 this close hangs. I don't know why.
2236 So have an interrupt jar it loose. */
2238 struct atimer
*timer
;
2242 EMACS_SET_SECS_USECS (offset
, 1, 0);
2243 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2246 emacs_close (forkin
);
2248 cancel_atimer (timer
);
2252 if (forkin
!= forkout
&& forkout
>= 0)
2253 emacs_close (forkout
);
2257 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2260 XPROCESS (process
)->tty_name
= Qnil
;
2262 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
2263 /* Wait for child_setup to complete in case that vfork is
2264 actually defined as fork. The descriptor wait_child_setup[1]
2265 of a pipe is closed at the child side either by close-on-exec
2266 on successful execvp or the _exit call in child_setup. */
2270 emacs_close (wait_child_setup
[1]);
2271 emacs_read (wait_child_setup
[0], &dummy
, 1);
2272 emacs_close (wait_child_setup
[0]);
2277 /* Restore the signal state whether vfork succeeded or not.
2278 (We will signal an error, below, if it failed.) */
2279 #ifdef POSIX_SIGNALS
2280 #ifdef HAVE_WORKING_VFORK
2281 /* Restore the parent's signal handlers. */
2282 sigaction (SIGINT
, &sigint_action
, 0);
2283 sigaction (SIGQUIT
, &sigquit_action
, 0);
2285 sigaction (SIGHUP
, &sighup_action
, 0);
2287 #endif /* HAVE_WORKING_VFORK */
2288 /* Stop blocking signals in the parent. */
2289 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2290 #else /* !POSIX_SIGNALS */
2292 #if defined (BSD_SYSTEM) || defined (HPUX)
2293 sigsetmask (SIGEMPTYMASK
);
2294 #else /* ordinary USG */
2296 signal (SIGCHLD
, sigchld
);
2297 /* Now really handle any of these signals
2298 that came in during this function. */
2299 if (sigchld_deferred
)
2300 kill (getpid (), SIGCHLD
);
2302 #endif /* ordinary USG */
2303 #endif /* SIGCHLD */
2304 #endif /* !POSIX_SIGNALS */
2306 /* Now generate the error if vfork failed. */
2308 report_file_error ("Doing vfork", Qnil
);
2312 create_pty (process
)
2313 Lisp_Object process
;
2315 int inchannel
, outchannel
;
2317 /* Use volatile to protect variables from being clobbered by longjmp. */
2318 volatile int forkin
, forkout
;
2319 volatile int pty_flag
= 0;
2321 inchannel
= outchannel
= -1;
2324 if (!NILP (Vprocess_connection_type
))
2325 outchannel
= inchannel
= allocate_pty ();
2329 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
2330 /* On most USG systems it does not work to open the pty's tty here,
2331 then close it and reopen it in the child. */
2333 /* Don't let this terminal become our controlling terminal
2334 (in case we don't have one). */
2335 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2337 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
2340 report_file_error ("Opening pty", Qnil
);
2341 #if defined (DONT_REOPEN_PTY)
2342 /* In the case that vfork is defined as fork, the parent process
2343 (Emacs) may send some data before the child process completes
2344 tty options setup. So we setup tty before forking. */
2345 child_setup_tty (forkout
);
2346 #endif /* DONT_REOPEN_PTY */
2348 forkin
= forkout
= -1;
2349 #endif /* not USG, or USG_SUBTTY_WORKS */
2352 #endif /* HAVE_PTYS */
2355 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2356 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2359 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2360 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2364 /* Record this as an active process, with its channels.
2365 As a result, child_setup will close Emacs's side of the pipes. */
2366 chan_process
[inchannel
] = process
;
2367 XPROCESS (process
)->infd
= inchannel
;
2368 XPROCESS (process
)->outfd
= outchannel
;
2370 /* Previously we recorded the tty descriptor used in the subprocess.
2371 It was only used for getting the foreground tty process, so now
2372 we just reopen the device (see emacs_get_tty_pgrp) as this is
2373 more portable (see USG_SUBTTY_WORKS above). */
2375 XPROCESS (process
)->pty_flag
= pty_flag
;
2376 XPROCESS (process
)->status
= Qrun
;
2377 setup_process_coding_systems (process
);
2379 FD_SET (inchannel
, &input_wait_mask
);
2380 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2381 if (inchannel
> max_process_desc
)
2382 max_process_desc
= inchannel
;
2384 XPROCESS (process
)->pid
= -2;
2387 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2390 XPROCESS (process
)->tty_name
= Qnil
;
2396 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2397 The address family of sa is not included in the result. */
2400 conv_sockaddr_to_lisp (sa
, len
)
2401 struct sockaddr
*sa
;
2404 Lisp_Object address
;
2407 register struct Lisp_Vector
*p
;
2409 /* Workaround for a bug in getsockname on BSD: Names bound to
2410 sockets in the UNIX domain are inaccessible; getsockname returns
2411 a zero length name. */
2412 if (len
< OFFSETOF (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2413 return empty_unibyte_string
;
2415 switch (sa
->sa_family
)
2419 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2420 len
= sizeof (sin
->sin_addr
) + 1;
2421 address
= Fmake_vector (make_number (len
), Qnil
);
2422 p
= XVECTOR (address
);
2423 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2424 cp
= (unsigned char *) &sin
->sin_addr
;
2430 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2431 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2432 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2433 address
= Fmake_vector (make_number (len
), Qnil
);
2434 p
= XVECTOR (address
);
2435 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2436 for (i
= 0; i
< len
; i
++)
2437 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2441 #ifdef HAVE_LOCAL_SOCKETS
2444 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2445 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2446 if (sockun
->sun_path
[i
] == 0)
2448 return make_unibyte_string (sockun
->sun_path
, i
);
2452 len
-= OFFSETOF (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2453 address
= Fcons (make_number (sa
->sa_family
),
2454 Fmake_vector (make_number (len
), Qnil
));
2455 p
= XVECTOR (XCDR (address
));
2456 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2462 p
->contents
[i
++] = make_number (*cp
++);
2468 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2471 get_lisp_to_sockaddr_size (address
, familyp
)
2472 Lisp_Object address
;
2475 register struct Lisp_Vector
*p
;
2477 if (VECTORP (address
))
2479 p
= XVECTOR (address
);
2483 return sizeof (struct sockaddr_in
);
2486 else if (p
->size
== 9)
2488 *familyp
= AF_INET6
;
2489 return sizeof (struct sockaddr_in6
);
2493 #ifdef HAVE_LOCAL_SOCKETS
2494 else if (STRINGP (address
))
2496 *familyp
= AF_LOCAL
;
2497 return sizeof (struct sockaddr_un
);
2500 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2502 struct sockaddr
*sa
;
2503 *familyp
= XINT (XCAR (address
));
2504 p
= XVECTOR (XCDR (address
));
2505 return p
->size
+ sizeof (sa
->sa_family
);
2510 /* Convert an address object (vector or string) to an internal sockaddr.
2512 The address format has been basically validated by
2513 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2514 it could have come from user data. So if FAMILY is not valid,
2515 we return after zeroing *SA. */
2518 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2520 Lisp_Object address
;
2521 struct sockaddr
*sa
;
2524 register struct Lisp_Vector
*p
;
2525 register unsigned char *cp
= NULL
;
2530 if (VECTORP (address
))
2532 p
= XVECTOR (address
);
2533 if (family
== AF_INET
)
2535 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2536 len
= sizeof (sin
->sin_addr
) + 1;
2537 i
= XINT (p
->contents
[--len
]);
2538 sin
->sin_port
= htons (i
);
2539 cp
= (unsigned char *)&sin
->sin_addr
;
2540 sa
->sa_family
= family
;
2543 else if (family
== AF_INET6
)
2545 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2546 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2547 len
= sizeof (sin6
->sin6_addr
) + 1;
2548 i
= XINT (p
->contents
[--len
]);
2549 sin6
->sin6_port
= htons (i
);
2550 for (i
= 0; i
< len
; i
++)
2551 if (INTEGERP (p
->contents
[i
]))
2553 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2556 sa
->sa_family
= family
;
2563 else if (STRINGP (address
))
2565 #ifdef HAVE_LOCAL_SOCKETS
2566 if (family
== AF_LOCAL
)
2568 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2569 cp
= SDATA (address
);
2570 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2571 sockun
->sun_path
[i
] = *cp
++;
2572 sa
->sa_family
= family
;
2579 p
= XVECTOR (XCDR (address
));
2580 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2583 for (i
= 0; i
< len
; i
++)
2584 if (INTEGERP (p
->contents
[i
]))
2585 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2588 #ifdef DATAGRAM_SOCKETS
2589 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2591 doc
: /* Get the current datagram address associated with PROCESS. */)
2593 Lisp_Object process
;
2597 CHECK_PROCESS (process
);
2599 if (!DATAGRAM_CONN_P (process
))
2602 channel
= XPROCESS (process
)->infd
;
2603 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2604 datagram_address
[channel
].len
);
2607 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2609 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2610 Returns nil upon error setting address, ADDRESS otherwise. */)
2612 Lisp_Object process
, address
;
2617 CHECK_PROCESS (process
);
2619 if (!DATAGRAM_CONN_P (process
))
2622 channel
= XPROCESS (process
)->infd
;
2624 len
= get_lisp_to_sockaddr_size (address
, &family
);
2625 if (datagram_address
[channel
].len
!= len
)
2627 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2633 static const struct socket_options
{
2634 /* The name of this option. Should be lowercase version of option
2635 name without SO_ prefix. */
2637 /* Option level SOL_... */
2639 /* Option number SO_... */
2641 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2642 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2643 } socket_options
[] =
2645 #ifdef SO_BINDTODEVICE
2646 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2649 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2652 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2655 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2658 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2661 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2664 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2667 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2669 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2672 /* Set option OPT to value VAL on socket S.
2674 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2675 Signals an error if setting a known option fails.
2679 set_socket_option (s
, opt
, val
)
2681 Lisp_Object opt
, val
;
2684 const struct socket_options
*sopt
;
2689 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2690 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2691 if (strcmp (name
, sopt
->name
) == 0)
2694 switch (sopt
->opttype
)
2699 optval
= NILP (val
) ? 0 : 1;
2700 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2701 &optval
, sizeof (optval
));
2709 optval
= XINT (val
);
2711 error ("Bad option value for %s", name
);
2712 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2713 &optval
, sizeof (optval
));
2717 #ifdef SO_BINDTODEVICE
2720 char devname
[IFNAMSIZ
+1];
2722 /* This is broken, at least in the Linux 2.4 kernel.
2723 To unbind, the arg must be a zero integer, not the empty string.
2724 This should work on all systems. KFS. 2003-09-23. */
2725 bzero (devname
, sizeof devname
);
2728 char *arg
= (char *) SDATA (val
);
2729 int len
= min (strlen (arg
), IFNAMSIZ
);
2730 bcopy (arg
, devname
, len
);
2732 else if (!NILP (val
))
2733 error ("Bad option value for %s", name
);
2734 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2743 struct linger linger
;
2746 linger
.l_linger
= 0;
2748 linger
.l_linger
= XINT (val
);
2750 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2751 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2752 &linger
, sizeof (linger
));
2762 report_file_error ("Cannot set network option",
2763 Fcons (opt
, Fcons (val
, Qnil
)));
2764 return (1 << sopt
->optbit
);
2768 DEFUN ("set-network-process-option",
2769 Fset_network_process_option
, Sset_network_process_option
,
2771 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2772 See `make-network-process' for a list of options and values.
2773 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2774 OPTION is not a supported option, return nil instead; otherwise return t. */)
2775 (process
, option
, value
, no_error
)
2776 Lisp_Object process
, option
, value
;
2777 Lisp_Object no_error
;
2780 struct Lisp_Process
*p
;
2782 CHECK_PROCESS (process
);
2783 p
= XPROCESS (process
);
2784 if (!NETCONN1_P (p
))
2785 error ("Process is not a network process");
2789 error ("Process is not running");
2791 if (set_socket_option (s
, option
, value
))
2793 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2797 if (NILP (no_error
))
2798 error ("Unknown or unsupported option");
2805 DEFUN ("serial-process-configure",
2806 Fserial_process_configure
,
2807 Sserial_process_configure
,
2809 doc
: /* Configure speed, bytesize, etc. of a serial process.
2811 Arguments are specified as keyword/argument pairs. Attributes that
2812 are not given are re-initialized from the process's current
2813 configuration (available via the function `process-contact') or set to
2814 reasonable default values. The following arguments are defined:
2820 -- Any of these arguments can be given to identify the process that is
2821 to be configured. If none of these arguments is given, the current
2822 buffer's process is used.
2824 :speed SPEED -- SPEED is the speed of the serial port in bits per
2825 second, also called baud rate. Any value can be given for SPEED, but
2826 most serial ports work only at a few defined values between 1200 and
2827 115200, with 9600 being the most common value. If SPEED is nil, the
2828 serial port is not configured any further, i.e., all other arguments
2829 are ignored. This may be useful for special serial ports such as
2830 Bluetooth-to-serial converters which can only be configured through AT
2831 commands. A value of nil for SPEED can be used only when passed
2832 through `make-serial-process' or `serial-term'.
2834 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2835 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2837 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2838 `odd' (use odd parity), or the symbol `even' (use even parity). If
2839 PARITY is not given, no parity is used.
2841 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2842 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2843 is not given or nil, 1 stopbit is used.
2845 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2846 flowcontrol to be used, which is either nil (don't use flowcontrol),
2847 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2848 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2849 flowcontrol is used.
2851 `serial-process-configure' is called by `make-serial-process' for the
2852 initial configuration of the serial port.
2856 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2858 \(serial-process-configure
2859 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2861 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2863 usage: (serial-process-configure &rest ARGS) */)
2868 struct Lisp_Process
*p
;
2869 Lisp_Object contact
= Qnil
;
2870 Lisp_Object proc
= Qnil
;
2871 struct gcpro gcpro1
;
2873 contact
= Flist (nargs
, args
);
2876 proc
= Fplist_get (contact
, QCprocess
);
2878 proc
= Fplist_get (contact
, QCname
);
2880 proc
= Fplist_get (contact
, QCbuffer
);
2882 proc
= Fplist_get (contact
, QCport
);
2883 proc
= get_process (proc
);
2884 p
= XPROCESS (proc
);
2885 if (!EQ (p
->type
, Qserial
))
2886 error ("Not a serial process");
2888 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2894 serial_configure (p
, contact
);
2900 /* Used by make-serial-process to recover from errors. */
2901 Lisp_Object
make_serial_process_unwind (Lisp_Object proc
)
2903 if (!PROCESSP (proc
))
2905 remove_process (proc
);
2909 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2911 doc
: /* Create and return a serial port process.
2913 In Emacs, serial port connections are represented by process objects,
2914 so input and output work as for subprocesses, and `delete-process'
2915 closes a serial port connection. However, a serial process has no
2916 process id, it cannot be signaled, and the status codes are different
2917 from normal processes.
2919 `make-serial-process' creates a process and a buffer, on which you
2920 probably want to use `process-send-string'. Try \\[serial-term] for
2921 an interactive terminal. See below for examples.
2923 Arguments are specified as keyword/argument pairs. The following
2924 arguments are defined:
2926 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2927 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2928 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2929 the backslashes in strings).
2931 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2932 which is called by `make-serial-process'.
2934 :name NAME -- NAME is the name of the process. If NAME is not given,
2935 the value of PORT is used.
2937 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2938 with the process. Process output goes at the end of that buffer,
2939 unless you specify an output stream or filter function to handle the
2940 output. If BUFFER is not given, the value of NAME is used.
2942 :coding CODING -- If CODING is a symbol, it specifies the coding
2943 system used for both reading and writing for this process. If CODING
2944 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2945 ENCODING is used for writing.
2947 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2948 the process is running. If BOOL is not given, query before exiting.
2950 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2951 In the stopped state, a serial process does not accept incoming data,
2952 but you can send outgoing data. The stopped state is cleared by
2953 `continue-process' and set by `stop-process'.
2955 :filter FILTER -- Install FILTER as the process filter.
2957 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2959 :plist PLIST -- Install PLIST as the initial plist of the process.
2966 -- These arguments are handled by `serial-process-configure', which is
2967 called by `make-serial-process'.
2969 The original argument list, possibly modified by later configuration,
2970 is available via the function `process-contact'.
2974 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2976 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2978 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2980 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2982 usage: (make-serial-process &rest ARGS) */)
2988 Lisp_Object proc
, contact
, port
;
2989 struct Lisp_Process
*p
;
2990 struct gcpro gcpro1
;
2991 Lisp_Object name
, buffer
;
2992 Lisp_Object tem
, val
;
2993 int specpdl_count
= -1;
2998 contact
= Flist (nargs
, args
);
3001 port
= Fplist_get (contact
, QCport
);
3003 error ("No port specified");
3004 CHECK_STRING (port
);
3006 if (NILP (Fplist_member (contact
, QCspeed
)))
3007 error (":speed not specified");
3008 if (!NILP (Fplist_get (contact
, QCspeed
)))
3009 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
3011 name
= Fplist_get (contact
, QCname
);
3014 CHECK_STRING (name
);
3015 proc
= make_process (name
);
3016 specpdl_count
= SPECPDL_INDEX ();
3017 record_unwind_protect (make_serial_process_unwind
, proc
);
3018 p
= XPROCESS (proc
);
3020 fd
= serial_open ((char*) SDATA (port
));
3023 if (fd
> max_process_desc
)
3024 max_process_desc
= fd
;
3025 chan_process
[fd
] = proc
;
3027 buffer
= Fplist_get (contact
, QCbuffer
);
3030 buffer
= Fget_buffer_create (buffer
);
3033 p
->childp
= contact
;
3034 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3036 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
3037 p
->filter
= Fplist_get (contact
, QCfilter
);
3039 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3040 p
->kill_without_query
= 1;
3041 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
3045 if (!EQ (p
->command
, Qt
))
3047 FD_SET (fd
, &input_wait_mask
);
3048 FD_SET (fd
, &non_keyboard_wait_mask
);
3051 if (BUFFERP (buffer
))
3053 set_marker_both (p
->mark
, buffer
,
3054 BUF_ZV (XBUFFER (buffer
)),
3055 BUF_ZV_BYTE (XBUFFER (buffer
)));
3058 tem
= Fplist_member (contact
, QCcoding
);
3059 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3065 val
= XCAR (XCDR (tem
));
3069 else if (!NILP (Vcoding_system_for_read
))
3070 val
= Vcoding_system_for_read
;
3071 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3072 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3074 p
->decode_coding_system
= val
;
3079 val
= XCAR (XCDR (tem
));
3083 else if (!NILP (Vcoding_system_for_write
))
3084 val
= Vcoding_system_for_write
;
3085 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3086 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3088 p
->encode_coding_system
= val
;
3090 setup_process_coding_systems (proc
);
3091 p
->decoding_buf
= make_uninit_string (0);
3092 p
->decoding_carryover
= 0;
3093 p
->encoding_buf
= make_uninit_string (0);
3094 p
->inherit_coding_system_flag
3095 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3097 Fserial_process_configure(nargs
, args
);
3099 specpdl_ptr
= specpdl
+ specpdl_count
;
3104 #endif /* HAVE_SERIAL */
3106 /* Create a network stream/datagram client/server process. Treated
3107 exactly like a normal process when reading and writing. Primary
3108 differences are in status display and process deletion. A network
3109 connection has no PID; you cannot signal it. All you can do is
3110 stop/continue it and deactivate/close it via delete-process */
3112 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
3114 doc
: /* Create and return a network server or client process.
3116 In Emacs, network connections are represented by process objects, so
3117 input and output work as for subprocesses and `delete-process' closes
3118 a network connection. However, a network process has no process id,
3119 it cannot be signaled, and the status codes are different from normal
3122 Arguments are specified as keyword/argument pairs. The following
3123 arguments are defined:
3125 :name NAME -- NAME is name for process. It is modified if necessary
3128 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
3129 with the process. Process output goes at end of that buffer, unless
3130 you specify an output stream or filter function to handle the output.
3131 BUFFER may be also nil, meaning that this process is not associated
3134 :host HOST -- HOST is name of the host to connect to, or its IP
3135 address. The symbol `local' specifies the local host. If specified
3136 for a server process, it must be a valid name or address for the local
3137 host, and only clients connecting to that address will be accepted.
3139 :service SERVICE -- SERVICE is name of the service desired, or an
3140 integer specifying a port number to connect to. If SERVICE is t,
3141 a random port number is selected for the server. (If Emacs was
3142 compiled with getaddrinfo, a port number can also be specified as a
3143 string, e.g. "80", as well as an integer. This is not portable.)
3145 :type TYPE -- TYPE is the type of connection. The default (nil) is a
3146 stream type connection, `datagram' creates a datagram type connection,
3147 `seqpacket' creates a reliable datagram connection.
3149 :family FAMILY -- FAMILY is the address (and protocol) family for the
3150 service specified by HOST and SERVICE. The default (nil) is to use
3151 whatever address family (IPv4 or IPv6) that is defined for the host
3152 and port number specified by HOST and SERVICE. Other address families
3154 local -- for a local (i.e. UNIX) address specified by SERVICE.
3155 ipv4 -- use IPv4 address family only.
3156 ipv6 -- use IPv6 address family only.
3158 :local ADDRESS -- ADDRESS is the local address used for the connection.
3159 This parameter is ignored when opening a client process. When specified
3160 for a server process, the FAMILY, HOST and SERVICE args are ignored.
3162 :remote ADDRESS -- ADDRESS is the remote partner's address for the
3163 connection. This parameter is ignored when opening a stream server
3164 process. For a datagram server process, it specifies the initial
3165 setting of the remote datagram address. When specified for a client
3166 process, the FAMILY, HOST, and SERVICE args are ignored.
3168 The format of ADDRESS depends on the address family:
3169 - An IPv4 address is represented as an vector of integers [A B C D P]
3170 corresponding to numeric IP address A.B.C.D and port number P.
3171 - A local address is represented as a string with the address in the
3172 local address space.
3173 - An "unsupported family" address is represented by a cons (F . AV)
3174 where F is the family number and AV is a vector containing the socket
3175 address data with one element per address data byte. Do not rely on
3176 this format in portable code, as it may depend on implementation
3177 defined constants, data sizes, and data structure alignment.
3179 :coding CODING -- If CODING is a symbol, it specifies the coding
3180 system used for both reading and writing for this process. If CODING
3181 is a cons (DECODING . ENCODING), DECODING is used for reading, and
3182 ENCODING is used for writing.
3184 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
3185 return without waiting for the connection to complete; instead, the
3186 sentinel function will be called with second arg matching "open" (if
3187 successful) or "failed" when the connect completes. Default is to use
3188 a blocking connect (i.e. wait) for stream type connections.
3190 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
3191 running when Emacs is exited.
3193 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
3194 In the stopped state, a server process does not accept new
3195 connections, and a client process does not handle incoming traffic.
3196 The stopped state is cleared by `continue-process' and set by
3199 :filter FILTER -- Install FILTER as the process filter.
3201 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
3202 process filter are multibyte, otherwise they are unibyte.
3203 If this keyword is not specified, the strings are multibyte if
3204 `default-enable-multibyte-characters' is non-nil.
3206 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
3208 :log LOG -- Install LOG as the server process log function. This
3209 function is called when the server accepts a network connection from a
3210 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
3211 is the server process, CLIENT is the new process for the connection,
3212 and MESSAGE is a string.
3214 :plist PLIST -- Install PLIST as the new process' initial plist.
3216 :server QLEN -- if QLEN is non-nil, create a server process for the
3217 specified FAMILY, SERVICE, and connection type (stream or datagram).
3218 If QLEN is an integer, it is used as the max. length of the server's
3219 pending connection queue (also known as the backlog); the default
3220 queue length is 5. Default is to create a client process.
3222 The following network options can be specified for this connection:
3224 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
3225 :dontroute BOOL -- Only send to directly connected hosts.
3226 :keepalive BOOL -- Send keep-alive messages on network stream.
3227 :linger BOOL or TIMEOUT -- Send queued messages before closing.
3228 :oobinline BOOL -- Place out-of-band data in receive data stream.
3229 :priority INT -- Set protocol defined priority for sent packets.
3230 :reuseaddr BOOL -- Allow reusing a recently used local address
3231 (this is allowed by default for a server process).
3232 :bindtodevice NAME -- bind to interface NAME. Using this may require
3233 special privileges on some systems.
3235 Consult the relevant system programmer's manual pages for more
3236 information on using these options.
3239 A server process will listen for and accept connections from clients.
3240 When a client connection is accepted, a new network process is created
3241 for the connection with the following parameters:
3243 - The client's process name is constructed by concatenating the server
3244 process' NAME and a client identification string.
3245 - If the FILTER argument is non-nil, the client process will not get a
3246 separate process buffer; otherwise, the client's process buffer is a newly
3247 created buffer named after the server process' BUFFER name or process
3248 NAME concatenated with the client identification string.
3249 - The connection type and the process filter and sentinel parameters are
3250 inherited from the server process' TYPE, FILTER and SENTINEL.
3251 - The client process' contact info is set according to the client's
3252 addressing information (typically an IP address and a port number).
3253 - The client process' plist is initialized from the server's plist.
3255 Notice that the FILTER and SENTINEL args are never used directly by
3256 the server process. Also, the BUFFER argument is not used directly by
3257 the server process, but via the optional :log function, accepted (and
3258 failed) connections may be logged in the server process' buffer.
3260 The original argument list, modified with the actual connection
3261 information, is available via the `process-contact' function.
3263 usage: (make-network-process &rest ARGS) */)
3269 Lisp_Object contact
;
3270 struct Lisp_Process
*p
;
3271 #ifdef HAVE_GETADDRINFO
3272 struct addrinfo ai
, *res
, *lres
;
3273 struct addrinfo hints
;
3274 char *portstring
, portbuf
[128];
3275 #else /* HAVE_GETADDRINFO */
3276 struct _emacs_addrinfo
3282 struct sockaddr
*ai_addr
;
3283 struct _emacs_addrinfo
*ai_next
;
3285 #endif /* HAVE_GETADDRINFO */
3286 struct sockaddr_in address_in
;
3287 #ifdef HAVE_LOCAL_SOCKETS
3288 struct sockaddr_un address_un
;
3293 int s
= -1, outch
, inch
;
3294 struct gcpro gcpro1
;
3295 int count
= SPECPDL_INDEX ();
3297 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
3299 Lisp_Object name
, buffer
, host
, service
, address
;
3300 Lisp_Object filter
, sentinel
;
3301 int is_non_blocking_client
= 0;
3302 int is_server
= 0, backlog
= 5;
3309 /* Save arguments for process-contact and clone-process. */
3310 contact
= Flist (nargs
, args
);
3314 /* Ensure socket support is loaded if available. */
3315 init_winsock (TRUE
);
3318 /* :type TYPE (nil: stream, datagram */
3319 tem
= Fplist_get (contact
, QCtype
);
3321 socktype
= SOCK_STREAM
;
3322 #ifdef DATAGRAM_SOCKETS
3323 else if (EQ (tem
, Qdatagram
))
3324 socktype
= SOCK_DGRAM
;
3326 #ifdef HAVE_SEQPACKET
3327 else if (EQ (tem
, Qseqpacket
))
3328 socktype
= SOCK_SEQPACKET
;
3331 error ("Unsupported connection type");
3334 tem
= Fplist_get (contact
, QCserver
);
3337 /* Don't support network sockets when non-blocking mode is
3338 not available, since a blocked Emacs is not useful. */
3339 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
3340 error ("Network servers not supported");
3344 backlog
= XINT (tem
);
3348 /* Make QCaddress an alias for :local (server) or :remote (client). */
3349 QCaddress
= is_server
? QClocal
: QCremote
;
3352 if (!is_server
&& socktype
!= SOCK_DGRAM
3353 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
3355 #ifndef NON_BLOCKING_CONNECT
3356 error ("Non-blocking connect not supported");
3358 is_non_blocking_client
= 1;
3362 name
= Fplist_get (contact
, QCname
);
3363 buffer
= Fplist_get (contact
, QCbuffer
);
3364 filter
= Fplist_get (contact
, QCfilter
);
3365 sentinel
= Fplist_get (contact
, QCsentinel
);
3367 CHECK_STRING (name
);
3369 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3370 ai
.ai_socktype
= socktype
;
3375 /* :local ADDRESS or :remote ADDRESS */
3376 address
= Fplist_get (contact
, QCaddress
);
3377 if (!NILP (address
))
3379 host
= service
= Qnil
;
3381 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3382 error ("Malformed :address");
3383 ai
.ai_family
= family
;
3384 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3385 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3389 /* :family FAMILY -- nil (for Inet), local, or integer. */
3390 tem
= Fplist_get (contact
, QCfamily
);
3393 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3399 #ifdef HAVE_LOCAL_SOCKETS
3400 else if (EQ (tem
, Qlocal
))
3404 else if (EQ (tem
, Qipv6
))
3407 else if (EQ (tem
, Qipv4
))
3409 else if (INTEGERP (tem
))
3410 family
= XINT (tem
);
3412 error ("Unknown address family");
3414 ai
.ai_family
= family
;
3416 /* :service SERVICE -- string, integer (port number), or t (random port). */
3417 service
= Fplist_get (contact
, QCservice
);
3419 #ifdef HAVE_LOCAL_SOCKETS
3420 if (family
== AF_LOCAL
)
3422 /* Host is not used. */
3424 CHECK_STRING (service
);
3425 bzero (&address_un
, sizeof address_un
);
3426 address_un
.sun_family
= AF_LOCAL
;
3427 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
3428 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3429 ai
.ai_addrlen
= sizeof address_un
;
3434 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3435 host
= Fplist_get (contact
, QChost
);
3438 if (EQ (host
, Qlocal
))
3439 host
= build_string ("localhost");
3440 CHECK_STRING (host
);
3443 /* Slow down polling to every ten seconds.
3444 Some kernels have a bug which causes retrying connect to fail
3445 after a connect. Polling can interfere with gethostbyname too. */
3446 #ifdef POLL_FOR_INPUT
3447 if (socktype
!= SOCK_DGRAM
)
3449 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3450 bind_polling_period (10);
3454 #ifdef HAVE_GETADDRINFO
3455 /* If we have a host, use getaddrinfo to resolve both host and service.
3456 Otherwise, use getservbyname to lookup the service. */
3460 /* SERVICE can either be a string or int.
3461 Convert to a C string for later use by getaddrinfo. */
3462 if (EQ (service
, Qt
))
3464 else if (INTEGERP (service
))
3466 sprintf (portbuf
, "%ld", (long) XINT (service
));
3467 portstring
= portbuf
;
3471 CHECK_STRING (service
);
3472 portstring
= SDATA (service
);
3477 memset (&hints
, 0, sizeof (hints
));
3479 hints
.ai_family
= family
;
3480 hints
.ai_socktype
= socktype
;
3481 hints
.ai_protocol
= 0;
3483 #ifdef HAVE_RES_INIT
3487 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
3489 #ifdef HAVE_GAI_STRERROR
3490 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
3492 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
3498 #endif /* HAVE_GETADDRINFO */
3500 /* We end up here if getaddrinfo is not defined, or in case no hostname
3501 has been specified (e.g. for a local server process). */
3503 if (EQ (service
, Qt
))
3505 else if (INTEGERP (service
))
3506 port
= htons ((unsigned short) XINT (service
));
3509 struct servent
*svc_info
;
3510 CHECK_STRING (service
);
3511 svc_info
= getservbyname (SDATA (service
),
3512 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3514 error ("Unknown service: %s", SDATA (service
));
3515 port
= svc_info
->s_port
;
3518 bzero (&address_in
, sizeof address_in
);
3519 address_in
.sin_family
= family
;
3520 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3521 address_in
.sin_port
= port
;
3523 #ifndef HAVE_GETADDRINFO
3526 struct hostent
*host_info_ptr
;
3528 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3529 as it may `hang' Emacs for a very long time. */
3533 #ifdef HAVE_RES_INIT
3537 host_info_ptr
= gethostbyname (SDATA (host
));
3542 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
3543 host_info_ptr
->h_length
);
3544 family
= host_info_ptr
->h_addrtype
;
3545 address_in
.sin_family
= family
;
3548 /* Attempt to interpret host as numeric inet address */
3550 unsigned long numeric_addr
;
3551 numeric_addr
= inet_addr ((char *) SDATA (host
));
3552 if (numeric_addr
== -1)
3553 error ("Unknown host \"%s\"", SDATA (host
));
3555 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
3556 sizeof (address_in
.sin_addr
));
3560 #endif /* not HAVE_GETADDRINFO */
3562 ai
.ai_family
= family
;
3563 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3564 ai
.ai_addrlen
= sizeof address_in
;
3568 /* Do this in case we never enter the for-loop below. */
3569 count1
= SPECPDL_INDEX ();
3572 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3576 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3583 #ifdef DATAGRAM_SOCKETS
3584 if (!is_server
&& socktype
== SOCK_DGRAM
)
3586 #endif /* DATAGRAM_SOCKETS */
3588 #ifdef NON_BLOCKING_CONNECT
3589 if (is_non_blocking_client
)
3592 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3594 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3606 /* Make us close S if quit. */
3607 record_unwind_protect (close_file_unwind
, make_number (s
));
3609 /* Parse network options in the arg list.
3610 We simply ignore anything which isn't a known option (including other keywords).
3611 An error is signaled if setting a known option fails. */
3612 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3613 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3617 /* Configure as a server socket. */
3619 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3620 explicit :reuseaddr key to override this. */
3621 #ifdef HAVE_LOCAL_SOCKETS
3622 if (family
!= AF_LOCAL
)
3624 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3627 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3628 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3631 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3632 report_file_error ("Cannot bind server socket", Qnil
);
3634 #ifdef HAVE_GETSOCKNAME
3635 if (EQ (service
, Qt
))
3637 struct sockaddr_in sa1
;
3638 int len1
= sizeof (sa1
);
3639 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3641 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3642 service
= make_number (ntohs (sa1
.sin_port
));
3643 contact
= Fplist_put (contact
, QCservice
, service
);
3648 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3649 report_file_error ("Cannot listen on server socket", Qnil
);
3657 /* This turns off all alarm-based interrupts; the
3658 bind_polling_period call above doesn't always turn all the
3659 short-interval ones off, especially if interrupt_input is
3662 It'd be nice to be able to control the connect timeout
3663 though. Would non-blocking connect calls be portable?
3665 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3667 turn_on_atimers (0);
3669 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3672 turn_on_atimers (1);
3674 if (ret
== 0 || xerrno
== EISCONN
)
3676 /* The unwind-protect will be discarded afterwards.
3677 Likewise for immediate_quit. */
3681 #ifdef NON_BLOCKING_CONNECT
3683 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3687 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3692 if (xerrno
== EINTR
)
3694 /* Unlike most other syscalls connect() cannot be called
3695 again. (That would return EALREADY.) The proper way to
3696 wait for completion is select(). */
3703 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3710 report_file_error ("select failed", Qnil
);
3714 int len
= sizeof xerrno
;
3715 eassert (FD_ISSET (s
, &fdset
));
3716 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3717 report_file_error ("getsockopt failed", Qnil
);
3719 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3727 /* Discard the unwind protect closing S. */
3728 specpdl_ptr
= specpdl
+ count1
;
3735 #ifdef DATAGRAM_SOCKETS
3736 if (socktype
== SOCK_DGRAM
)
3738 if (datagram_address
[s
].sa
)
3740 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3741 datagram_address
[s
].len
= lres
->ai_addrlen
;
3745 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3746 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3749 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3750 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3751 conv_lisp_to_sockaddr (rfamily
, remote
,
3752 datagram_address
[s
].sa
, rlen
);
3756 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3759 contact
= Fplist_put (contact
, QCaddress
,
3760 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3761 #ifdef HAVE_GETSOCKNAME
3764 struct sockaddr_in sa1
;
3765 int len1
= sizeof (sa1
);
3766 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3767 contact
= Fplist_put (contact
, QClocal
,
3768 conv_sockaddr_to_lisp (&sa1
, len1
));
3775 #ifdef HAVE_GETADDRINFO
3784 /* Discard the unwind protect for closing S, if any. */
3785 specpdl_ptr
= specpdl
+ count1
;
3787 /* Unwind bind_polling_period and request_sigio. */
3788 unbind_to (count
, Qnil
);
3792 /* If non-blocking got this far - and failed - assume non-blocking is
3793 not supported after all. This is probably a wrong assumption, but
3794 the normal blocking calls to open-network-stream handles this error
3796 if (is_non_blocking_client
)
3801 report_file_error ("make server process failed", contact
);
3803 report_file_error ("make client process failed", contact
);
3810 buffer
= Fget_buffer_create (buffer
);
3811 proc
= make_process (name
);
3813 chan_process
[inch
] = proc
;
3816 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3819 fcntl (inch
, F_SETFL
, O_NDELAY
);
3823 p
= XPROCESS (proc
);
3825 p
->childp
= contact
;
3826 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3830 p
->sentinel
= sentinel
;
3832 p
->log
= Fplist_get (contact
, QClog
);
3833 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3834 p
->kill_without_query
= 1;
3835 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3840 if (is_server
&& socktype
!= SOCK_DGRAM
)
3841 p
->status
= Qlisten
;
3843 /* Make the process marker point into the process buffer (if any). */
3844 if (BUFFERP (buffer
))
3845 set_marker_both (p
->mark
, buffer
,
3846 BUF_ZV (XBUFFER (buffer
)),
3847 BUF_ZV_BYTE (XBUFFER (buffer
)));
3849 #ifdef NON_BLOCKING_CONNECT
3850 if (is_non_blocking_client
)
3852 /* We may get here if connect did succeed immediately. However,
3853 in that case, we still need to signal this like a non-blocking
3855 p
->status
= Qconnect
;
3856 if (!FD_ISSET (inch
, &connect_wait_mask
))
3858 FD_SET (inch
, &connect_wait_mask
);
3859 num_pending_connects
++;
3864 /* A server may have a client filter setting of Qt, but it must
3865 still listen for incoming connects unless it is stopped. */
3866 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3867 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3869 FD_SET (inch
, &input_wait_mask
);
3870 FD_SET (inch
, &non_keyboard_wait_mask
);
3873 if (inch
> max_process_desc
)
3874 max_process_desc
= inch
;
3876 tem
= Fplist_member (contact
, QCcoding
);
3877 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3878 tem
= Qnil
; /* No error message (too late!). */
3881 /* Setup coding systems for communicating with the network stream. */
3882 struct gcpro gcpro1
;
3883 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3884 Lisp_Object coding_systems
= Qt
;
3885 Lisp_Object args
[5], val
;
3889 val
= XCAR (XCDR (tem
));
3893 else if (!NILP (Vcoding_system_for_read
))
3894 val
= Vcoding_system_for_read
;
3895 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3896 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3897 /* We dare not decode end-of-line format by setting VAL to
3898 Qraw_text, because the existing Emacs Lisp libraries
3899 assume that they receive bare code including a sequene of
3904 if (NILP (host
) || NILP (service
))
3905 coding_systems
= Qnil
;
3908 args
[0] = Qopen_network_stream
, args
[1] = name
,
3909 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3911 coding_systems
= Ffind_operation_coding_system (5, args
);
3914 if (CONSP (coding_systems
))
3915 val
= XCAR (coding_systems
);
3916 else if (CONSP (Vdefault_process_coding_system
))
3917 val
= XCAR (Vdefault_process_coding_system
);
3921 p
->decode_coding_system
= val
;
3925 val
= XCAR (XCDR (tem
));
3929 else if (!NILP (Vcoding_system_for_write
))
3930 val
= Vcoding_system_for_write
;
3931 else if (NILP (current_buffer
->enable_multibyte_characters
))
3935 if (EQ (coding_systems
, Qt
))
3937 if (NILP (host
) || NILP (service
))
3938 coding_systems
= Qnil
;
3941 args
[0] = Qopen_network_stream
, args
[1] = name
,
3942 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3944 coding_systems
= Ffind_operation_coding_system (5, args
);
3948 if (CONSP (coding_systems
))
3949 val
= XCDR (coding_systems
);
3950 else if (CONSP (Vdefault_process_coding_system
))
3951 val
= XCDR (Vdefault_process_coding_system
);
3955 p
->encode_coding_system
= val
;
3957 setup_process_coding_systems (proc
);
3959 p
->decoding_buf
= make_uninit_string (0);
3960 p
->decoding_carryover
= 0;
3961 p
->encoding_buf
= make_uninit_string (0);
3963 p
->inherit_coding_system_flag
3964 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3969 #endif /* HAVE_SOCKETS */
3972 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3975 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3976 doc
: /* Return an alist of all network interfaces and their network address.
3977 Each element is a cons, the car of which is a string containing the
3978 interface name, and the cdr is the network address in internal
3979 format; see the description of ADDRESS in `make-network-process'. */)
3982 struct ifconf ifconf
;
3983 struct ifreq
*ifreqs
= NULL
;
3988 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3994 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3995 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
4002 ifconf
.ifc_len
= buf_size
;
4003 ifconf
.ifc_req
= ifreqs
;
4004 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
4010 if (ifconf
.ifc_len
== buf_size
)
4014 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
4017 while (--ifaces
>= 0)
4019 struct ifreq
*ifq
= &ifreqs
[ifaces
];
4020 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
4021 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
4023 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
4024 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
4025 res
= Fcons (Fcons (build_string (namebuf
),
4026 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
4027 sizeof (struct sockaddr
))),
4033 #endif /* SIOCGIFCONF */
4035 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
4039 const char *flag_sym
;
4042 static const struct ifflag_def ifflag_table
[] = {
4046 #ifdef IFF_BROADCAST
4047 { IFF_BROADCAST
, "broadcast" },
4050 { IFF_DEBUG
, "debug" },
4053 { IFF_LOOPBACK
, "loopback" },
4055 #ifdef IFF_POINTOPOINT
4056 { IFF_POINTOPOINT
, "pointopoint" },
4059 { IFF_RUNNING
, "running" },
4062 { IFF_NOARP
, "noarp" },
4065 { IFF_PROMISC
, "promisc" },
4067 #ifdef IFF_NOTRAILERS
4068 { IFF_NOTRAILERS
, "notrailers" },
4071 { IFF_ALLMULTI
, "allmulti" },
4074 { IFF_MASTER
, "master" },
4077 { IFF_SLAVE
, "slave" },
4079 #ifdef IFF_MULTICAST
4080 { IFF_MULTICAST
, "multicast" },
4083 { IFF_PORTSEL
, "portsel" },
4085 #ifdef IFF_AUTOMEDIA
4086 { IFF_AUTOMEDIA
, "automedia" },
4089 { IFF_DYNAMIC
, "dynamic" },
4092 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
4095 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
4098 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
4101 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
4104 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
4109 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
4110 doc
: /* Return information about network interface named IFNAME.
4111 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
4112 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
4113 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
4114 FLAGS is the current flags of the interface. */)
4119 Lisp_Object res
= Qnil
;
4124 CHECK_STRING (ifname
);
4126 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
4127 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
4129 s
= socket (AF_INET
, SOCK_STREAM
, 0);
4134 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
4135 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
4137 int flags
= rq
.ifr_flags
;
4138 const struct ifflag_def
*fp
;
4142 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
4144 if (flags
& fp
->flag_bit
)
4146 elt
= Fcons (intern (fp
->flag_sym
), elt
);
4147 flags
-= fp
->flag_bit
;
4150 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
4152 if (flags
& (1 << fnum
))
4154 elt
= Fcons (make_number (fnum
), elt
);
4159 res
= Fcons (elt
, res
);
4162 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
4163 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
4165 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
4166 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
4170 for (n
= 0; n
< 6; n
++)
4171 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
4172 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
4175 res
= Fcons (elt
, res
);
4178 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
4179 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
4182 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
4183 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
4185 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4189 res
= Fcons (elt
, res
);
4192 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4193 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4196 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4199 res
= Fcons (elt
, res
);
4202 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
4203 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4206 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4209 res
= Fcons (elt
, res
);
4213 return any
? res
: Qnil
;
4216 #endif /* HAVE_SOCKETS */
4218 /* Turn off input and output for process PROC. */
4221 deactivate_process (proc
)
4224 register int inchannel
, outchannel
;
4225 register struct Lisp_Process
*p
= XPROCESS (proc
);
4227 inchannel
= p
->infd
;
4228 outchannel
= p
->outfd
;
4230 #ifdef ADAPTIVE_READ_BUFFERING
4231 if (p
->read_output_delay
> 0)
4233 if (--process_output_delay_count
< 0)
4234 process_output_delay_count
= 0;
4235 p
->read_output_delay
= 0;
4236 p
->read_output_skip
= 0;
4242 /* Beware SIGCHLD hereabouts. */
4243 flush_pending_output (inchannel
);
4244 emacs_close (inchannel
);
4245 if (outchannel
>= 0 && outchannel
!= inchannel
)
4246 emacs_close (outchannel
);
4250 #ifdef DATAGRAM_SOCKETS
4251 if (DATAGRAM_CHAN_P (inchannel
))
4253 xfree (datagram_address
[inchannel
].sa
);
4254 datagram_address
[inchannel
].sa
= 0;
4255 datagram_address
[inchannel
].len
= 0;
4258 chan_process
[inchannel
] = Qnil
;
4259 FD_CLR (inchannel
, &input_wait_mask
);
4260 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4261 #ifdef NON_BLOCKING_CONNECT
4262 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4264 FD_CLR (inchannel
, &connect_wait_mask
);
4265 if (--num_pending_connects
< 0)
4269 if (inchannel
== max_process_desc
)
4272 /* We just closed the highest-numbered process input descriptor,
4273 so recompute the highest-numbered one now. */
4274 max_process_desc
= 0;
4275 for (i
= 0; i
< MAXDESC
; i
++)
4276 if (!NILP (chan_process
[i
]))
4277 max_process_desc
= i
;
4282 /* Close all descriptors currently in use for communication
4283 with subprocess. This is used in a newly-forked subprocess
4284 to get rid of irrelevant descriptors. */
4287 close_process_descs ()
4291 for (i
= 0; i
< MAXDESC
; i
++)
4293 Lisp_Object process
;
4294 process
= chan_process
[i
];
4295 if (!NILP (process
))
4297 int in
= XPROCESS (process
)->infd
;
4298 int out
= XPROCESS (process
)->outfd
;
4301 if (out
>= 0 && in
!= out
)
4308 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4310 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4311 It is read into the process' buffers or given to their filter functions.
4312 Non-nil arg PROCESS means do not return until some output has been received
4315 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4316 and milliseconds to wait; return after that much time whether or not
4317 there is any subprocess output. If SECONDS is a floating point number,
4318 it specifies a fractional number of seconds to wait.
4319 The MILLISEC argument is obsolete and should be avoided.
4321 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4322 from PROCESS, suspending reading output from other processes.
4323 If JUST-THIS-ONE is an integer, don't run any timers either.
4324 Return non-nil if we received any output before the timeout expired. */)
4325 (process
, seconds
, millisec
, just_this_one
)
4326 register Lisp_Object process
, seconds
, millisec
, just_this_one
;
4328 int secs
, usecs
= 0;
4330 if (! NILP (process
))
4331 CHECK_PROCESS (process
);
4333 just_this_one
= Qnil
;
4335 if (!NILP (millisec
))
4336 { /* Obsolete calling convention using integers rather than floats. */
4337 CHECK_NUMBER (millisec
);
4339 seconds
= make_float (XINT (millisec
) / 1000.0);
4342 CHECK_NUMBER (seconds
);
4343 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4347 if (!NILP (seconds
))
4349 if (INTEGERP (seconds
))
4350 secs
= XINT (seconds
);
4351 else if (FLOATP (seconds
))
4353 double timeout
= XFLOAT_DATA (seconds
);
4354 secs
= (int) timeout
;
4355 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
4358 wrong_type_argument (Qnumberp
, seconds
);
4360 if (secs
< 0 || (secs
== 0 && usecs
== 0))
4361 secs
= -1, usecs
= 0;
4364 secs
= NILP (process
) ? -1 : 0;
4367 (wait_reading_process_output (secs
, usecs
, 0, 0,
4369 !NILP (process
) ? XPROCESS (process
) : NULL
,
4370 NILP (just_this_one
) ? 0 :
4371 !INTEGERP (just_this_one
) ? 1 : -1)
4375 /* Accept a connection for server process SERVER on CHANNEL. */
4377 static int connect_counter
= 0;
4380 server_accept_connection (server
, channel
)
4384 Lisp_Object proc
, caller
, name
, buffer
;
4385 Lisp_Object contact
, host
, service
;
4386 struct Lisp_Process
*ps
= XPROCESS (server
);
4387 struct Lisp_Process
*p
;
4391 struct sockaddr_in in
;
4393 struct sockaddr_in6 in6
;
4395 #ifdef HAVE_LOCAL_SOCKETS
4396 struct sockaddr_un un
;
4399 int len
= sizeof saddr
;
4401 s
= accept (channel
, &saddr
.sa
, &len
);
4410 if (code
== EWOULDBLOCK
)
4414 if (!NILP (ps
->log
))
4415 call3 (ps
->log
, server
, Qnil
,
4416 concat3 (build_string ("accept failed with code"),
4417 Fnumber_to_string (make_number (code
)),
4418 build_string ("\n")));
4424 /* Setup a new process to handle the connection. */
4426 /* Generate a unique identification of the caller, and build contact
4427 information for this process. */
4430 switch (saddr
.sa
.sa_family
)
4434 Lisp_Object args
[5];
4435 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4436 args
[0] = build_string ("%d.%d.%d.%d");
4437 args
[1] = make_number (*ip
++);
4438 args
[2] = make_number (*ip
++);
4439 args
[3] = make_number (*ip
++);
4440 args
[4] = make_number (*ip
++);
4441 host
= Fformat (5, args
);
4442 service
= make_number (ntohs (saddr
.in
.sin_port
));
4444 args
[0] = build_string (" <%s:%d>");
4447 caller
= Fformat (3, args
);
4454 Lisp_Object args
[9];
4455 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4457 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4458 for (i
= 0; i
< 8; i
++)
4459 args
[i
+1] = make_number (ntohs(ip6
[i
]));
4460 host
= Fformat (9, args
);
4461 service
= make_number (ntohs (saddr
.in
.sin_port
));
4463 args
[0] = build_string (" <[%s]:%d>");
4466 caller
= Fformat (3, args
);
4471 #ifdef HAVE_LOCAL_SOCKETS
4475 caller
= Fnumber_to_string (make_number (connect_counter
));
4476 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4480 /* Create a new buffer name for this process if it doesn't have a
4481 filter. The new buffer name is based on the buffer name or
4482 process name of the server process concatenated with the caller
4485 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4489 buffer
= ps
->buffer
;
4491 buffer
= Fbuffer_name (buffer
);
4496 buffer
= concat2 (buffer
, caller
);
4497 buffer
= Fget_buffer_create (buffer
);
4501 /* Generate a unique name for the new server process. Combine the
4502 server process name with the caller identification. */
4504 name
= concat2 (ps
->name
, caller
);
4505 proc
= make_process (name
);
4507 chan_process
[s
] = proc
;
4510 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4513 fcntl (s
, F_SETFL
, O_NDELAY
);
4517 p
= XPROCESS (proc
);
4519 /* Build new contact information for this setup. */
4520 contact
= Fcopy_sequence (ps
->childp
);
4521 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4522 contact
= Fplist_put (contact
, QChost
, host
);
4523 if (!NILP (service
))
4524 contact
= Fplist_put (contact
, QCservice
, service
);
4525 contact
= Fplist_put (contact
, QCremote
,
4526 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4527 #ifdef HAVE_GETSOCKNAME
4529 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4530 contact
= Fplist_put (contact
, QClocal
,
4531 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4534 p
->childp
= contact
;
4535 p
->plist
= Fcopy_sequence (ps
->plist
);
4539 p
->sentinel
= ps
->sentinel
;
4540 p
->filter
= ps
->filter
;
4547 /* Client processes for accepted connections are not stopped initially. */
4548 if (!EQ (p
->filter
, Qt
))
4550 FD_SET (s
, &input_wait_mask
);
4551 FD_SET (s
, &non_keyboard_wait_mask
);
4554 if (s
> max_process_desc
)
4555 max_process_desc
= s
;
4557 /* Setup coding system for new process based on server process.
4558 This seems to be the proper thing to do, as the coding system
4559 of the new process should reflect the settings at the time the
4560 server socket was opened; not the current settings. */
4562 p
->decode_coding_system
= ps
->decode_coding_system
;
4563 p
->encode_coding_system
= ps
->encode_coding_system
;
4564 setup_process_coding_systems (proc
);
4566 p
->decoding_buf
= make_uninit_string (0);
4567 p
->decoding_carryover
= 0;
4568 p
->encoding_buf
= make_uninit_string (0);
4570 p
->inherit_coding_system_flag
4571 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4573 if (!NILP (ps
->log
))
4574 call3 (ps
->log
, server
, proc
,
4575 concat3 (build_string ("accept from "),
4576 (STRINGP (host
) ? host
: build_string ("-")),
4577 build_string ("\n")));
4579 if (!NILP (p
->sentinel
))
4580 exec_sentinel (proc
,
4581 concat3 (build_string ("open from "),
4582 (STRINGP (host
) ? host
: build_string ("-")),
4583 build_string ("\n")));
4586 /* This variable is different from waiting_for_input in keyboard.c.
4587 It is used to communicate to a lisp process-filter/sentinel (via the
4588 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4589 for user-input when that process-filter was called.
4590 waiting_for_input cannot be used as that is by definition 0 when
4591 lisp code is being evalled.
4592 This is also used in record_asynch_buffer_change.
4593 For that purpose, this must be 0
4594 when not inside wait_reading_process_output. */
4595 static int waiting_for_user_input_p
;
4598 wait_reading_process_output_unwind (data
)
4601 waiting_for_user_input_p
= XINT (data
);
4605 /* This is here so breakpoints can be put on it. */
4607 wait_reading_process_output_1 ()
4611 /* Use a wrapper around select to work around a bug in gdb 5.3.
4612 Normally, the wrapper is optimized away by inlining.
4614 If emacs is stopped inside select, the gdb backtrace doesn't
4615 show the function which called select, so it is practically
4616 impossible to step through wait_reading_process_output. */
4620 select_wrapper (n
, rfd
, wfd
, xfd
, tmo
)
4622 SELECT_TYPE
*rfd
, *wfd
, *xfd
;
4625 return select (n
, rfd
, wfd
, xfd
, tmo
);
4627 #define select select_wrapper
4630 /* Read and dispose of subprocess output while waiting for timeout to
4631 elapse and/or keyboard input to be available.
4634 timeout in seconds, or
4635 zero for no limit, or
4636 -1 means gobble data immediately available but don't wait for any.
4639 an additional duration to wait, measured in microseconds.
4640 If this is nonzero and time_limit is 0, then the timeout
4641 consists of MICROSECS only.
4643 READ_KBD is a lisp value:
4644 0 to ignore keyboard input, or
4645 1 to return when input is available, or
4646 -1 meaning caller will actually read the input, so don't throw to
4647 the quit handler, or
4649 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4650 output that arrives.
4652 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4653 (and gobble terminal input into the buffer if any arrives).
4655 If WAIT_PROC is specified, wait until something arrives from that
4656 process. The return value is true if we read some input from
4659 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4660 (suspending output from other processes). A negative value
4661 means don't run any timers either.
4663 If WAIT_PROC is specified, then the function returns true if we
4664 received input from that process before the timeout elapsed.
4665 Otherwise, return true if we received input from any process. */
4668 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4669 wait_for_cell
, wait_proc
, just_wait_proc
)
4670 int time_limit
, microsecs
, read_kbd
, do_display
;
4671 Lisp_Object wait_for_cell
;
4672 struct Lisp_Process
*wait_proc
;
4675 register int channel
, nfds
;
4676 SELECT_TYPE Available
;
4677 #ifdef NON_BLOCKING_CONNECT
4678 SELECT_TYPE Connecting
;
4681 int check_delay
, no_avail
;
4684 EMACS_TIME timeout
, end_time
;
4685 int wait_channel
= -1;
4686 int got_some_input
= 0;
4687 int count
= SPECPDL_INDEX ();
4689 FD_ZERO (&Available
);
4690 #ifdef NON_BLOCKING_CONNECT
4691 FD_ZERO (&Connecting
);
4694 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4695 if (wait_proc
!= NULL
)
4696 wait_channel
= wait_proc
->infd
;
4698 record_unwind_protect (wait_reading_process_output_unwind
,
4699 make_number (waiting_for_user_input_p
));
4700 waiting_for_user_input_p
= read_kbd
;
4702 /* Since we may need to wait several times,
4703 compute the absolute time to return at. */
4704 if (time_limit
|| microsecs
)
4706 EMACS_GET_TIME (end_time
);
4707 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4708 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4713 int timeout_reduced_for_timers
= 0;
4715 /* If calling from keyboard input, do not quit
4716 since we want to return C-g as an input character.
4717 Otherwise, do pending quit if requested. */
4722 process_pending_signals ();
4725 /* Exit now if the cell we're waiting for became non-nil. */
4726 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4729 /* Compute time from now till when time limit is up */
4730 /* Exit if already run out */
4731 if (time_limit
== -1)
4733 /* -1 specified for timeout means
4734 gobble output available now
4735 but don't wait at all. */
4737 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4739 else if (time_limit
|| microsecs
)
4741 EMACS_GET_TIME (timeout
);
4742 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4743 if (EMACS_TIME_NEG_P (timeout
))
4748 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4751 /* Normally we run timers here.
4752 But not if wait_for_cell; in those cases,
4753 the wait is supposed to be short,
4754 and those callers cannot handle running arbitrary Lisp code here. */
4755 if (NILP (wait_for_cell
)
4756 && just_wait_proc
>= 0)
4758 EMACS_TIME timer_delay
;
4762 int old_timers_run
= timers_run
;
4763 struct buffer
*old_buffer
= current_buffer
;
4764 Lisp_Object old_window
= selected_window
;
4766 timer_delay
= timer_check (1);
4768 /* If a timer has run, this might have changed buffers
4769 an alike. Make read_key_sequence aware of that. */
4770 if (timers_run
!= old_timers_run
4771 && (old_buffer
!= current_buffer
4772 || !EQ (old_window
, selected_window
))
4773 && waiting_for_user_input_p
== -1)
4774 record_asynch_buffer_change ();
4776 if (timers_run
!= old_timers_run
&& do_display
)
4777 /* We must retry, since a timer may have requeued itself
4778 and that could alter the time_delay. */
4779 redisplay_preserve_echo_area (9);
4783 while (!detect_input_pending ());
4785 /* If there is unread keyboard input, also return. */
4787 && requeued_events_pending_p ())
4790 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4792 EMACS_TIME difference
;
4793 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4794 if (EMACS_TIME_NEG_P (difference
))
4796 timeout
= timer_delay
;
4797 timeout_reduced_for_timers
= 1;
4800 /* If time_limit is -1, we are not going to wait at all. */
4801 else if (time_limit
!= -1)
4803 /* This is so a breakpoint can be put here. */
4804 wait_reading_process_output_1 ();
4808 /* Cause C-g and alarm signals to take immediate action,
4809 and cause input available signals to zero out timeout.
4811 It is important that we do this before checking for process
4812 activity. If we get a SIGCHLD after the explicit checks for
4813 process activity, timeout is the only way we will know. */
4815 set_waiting_for_input (&timeout
);
4817 /* If status of something has changed, and no input is
4818 available, notify the user of the change right away. After
4819 this explicit check, we'll let the SIGCHLD handler zap
4820 timeout to get our attention. */
4821 if (update_tick
!= process_tick
)
4824 #ifdef NON_BLOCKING_CONNECT
4828 if (kbd_on_hold_p ())
4831 Atemp
= input_wait_mask
;
4833 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4835 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4836 if ((select (max (max (max_process_desc
, max_keyboard_desc
),
4839 #ifdef NON_BLOCKING_CONNECT
4840 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4844 (SELECT_TYPE
*)0, &timeout
)
4847 /* It's okay for us to do this and then continue with
4848 the loop, since timeout has already been zeroed out. */
4849 clear_waiting_for_input ();
4850 status_notify (NULL
);
4851 if (do_display
) redisplay_preserve_echo_area (13);
4855 /* Don't wait for output from a non-running process. Just
4856 read whatever data has already been received. */
4857 if (wait_proc
&& wait_proc
->raw_status_new
)
4858 update_status (wait_proc
);
4860 && ! EQ (wait_proc
->status
, Qrun
)
4861 && ! EQ (wait_proc
->status
, Qconnect
))
4863 int nread
, total_nread
= 0;
4865 clear_waiting_for_input ();
4866 XSETPROCESS (proc
, wait_proc
);
4868 /* Read data from the process, until we exhaust it. */
4869 while (wait_proc
->infd
>= 0)
4871 nread
= read_process_output (proc
, wait_proc
->infd
);
4878 total_nread
+= nread
;
4882 else if (nread
== -1 && EIO
== errno
)
4886 else if (nread
== -1 && EAGAIN
== errno
)
4890 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4894 if (total_nread
> 0 && do_display
)
4895 redisplay_preserve_echo_area (10);
4900 /* Wait till there is something to do */
4902 if (wait_proc
&& just_wait_proc
)
4904 if (wait_proc
->infd
< 0) /* Terminated */
4906 FD_SET (wait_proc
->infd
, &Available
);
4908 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4910 else if (!NILP (wait_for_cell
))
4912 Available
= non_process_wait_mask
;
4914 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4919 Available
= non_keyboard_wait_mask
;
4921 Available
= input_wait_mask
;
4922 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4923 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4926 /* If frame size has changed or the window is newly mapped,
4927 redisplay now, before we start to wait. There is a race
4928 condition here; if a SIGIO arrives between now and the select
4929 and indicates that a frame is trashed, the select may block
4930 displaying a trashed screen. */
4931 if (frame_garbaged
&& do_display
)
4933 clear_waiting_for_input ();
4934 redisplay_preserve_echo_area (11);
4936 set_waiting_for_input (&timeout
);
4940 if (read_kbd
&& detect_input_pending ())
4947 #ifdef NON_BLOCKING_CONNECT
4949 Connecting
= connect_wait_mask
;
4952 #ifdef ADAPTIVE_READ_BUFFERING
4953 /* Set the timeout for adaptive read buffering if any
4954 process has non-zero read_output_skip and non-zero
4955 read_output_delay, and we are not reading output for a
4956 specific wait_channel. It is not executed if
4957 Vprocess_adaptive_read_buffering is nil. */
4958 if (process_output_skip
&& check_delay
> 0)
4960 int usecs
= EMACS_USECS (timeout
);
4961 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4962 usecs
= READ_OUTPUT_DELAY_MAX
;
4963 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4965 proc
= chan_process
[channel
];
4968 /* Find minimum non-zero read_output_delay among the
4969 processes with non-zero read_output_skip. */
4970 if (XPROCESS (proc
)->read_output_delay
> 0)
4973 if (!XPROCESS (proc
)->read_output_skip
)
4975 FD_CLR (channel
, &Available
);
4976 XPROCESS (proc
)->read_output_skip
= 0;
4977 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4978 usecs
= XPROCESS (proc
)->read_output_delay
;
4981 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4982 process_output_skip
= 0;
4985 #if defined (USE_GTK) || defined (HAVE_GCONF)
4987 #elif defined (HAVE_NS)
4992 (max (max (max_process_desc
, max_keyboard_desc
),
4995 #ifdef NON_BLOCKING_CONNECT
4996 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
5000 (SELECT_TYPE
*)0, &timeout
);
5005 /* Make C-g and alarm signals set flags again */
5006 clear_waiting_for_input ();
5008 /* If we woke up due to SIGWINCH, actually change size now. */
5009 do_pending_window_change (0);
5011 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
5012 /* We wanted the full specified time, so return now. */
5016 if (xerrno
== EINTR
)
5018 else if (xerrno
== EBADF
)
5021 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
5022 the child's closure of the pts gives the parent a SIGHUP, and
5023 the ptc file descriptor is automatically closed,
5024 yielding EBADF here or at select() call above.
5025 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
5026 in m/ibmrt-aix.h), and here we just ignore the select error.
5027 Cleanup occurs c/o status_notify after SIGCLD. */
5028 no_avail
= 1; /* Cannot depend on values returned */
5034 error ("select error: %s", emacs_strerror (xerrno
));
5039 FD_ZERO (&Available
);
5040 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
5043 #if 0 /* When polling is used, interrupt_input is 0,
5044 so get_input_pending should read the input.
5045 So this should not be needed. */
5046 /* If we are using polling for input,
5047 and we see input available, make it get read now.
5048 Otherwise it might not actually get read for a second.
5049 And on hpux, since we turn off polling in wait_reading_process_output,
5050 it might never get read at all if we don't spend much time
5051 outside of wait_reading_process_output. */
5052 if (read_kbd
&& interrupt_input
5053 && keyboard_bit_set (&Available
)
5054 && input_polling_used ())
5055 kill (getpid (), SIGALRM
);
5058 /* Check for keyboard input */
5059 /* If there is any, return immediately
5060 to give it higher priority than subprocesses */
5064 int old_timers_run
= timers_run
;
5065 struct buffer
*old_buffer
= current_buffer
;
5066 Lisp_Object old_window
= selected_window
;
5069 if (detect_input_pending_run_timers (do_display
))
5071 swallow_events (do_display
);
5072 if (detect_input_pending_run_timers (do_display
))
5076 /* If a timer has run, this might have changed buffers
5077 an alike. Make read_key_sequence aware of that. */
5078 if (timers_run
!= old_timers_run
5079 && waiting_for_user_input_p
== -1
5080 && (old_buffer
!= current_buffer
5081 || !EQ (old_window
, selected_window
)))
5082 record_asynch_buffer_change ();
5088 /* If there is unread keyboard input, also return. */
5090 && requeued_events_pending_p ())
5093 /* If we are not checking for keyboard input now,
5094 do process events (but don't run any timers).
5095 This is so that X events will be processed.
5096 Otherwise they may have to wait until polling takes place.
5097 That would causes delays in pasting selections, for example.
5099 (We used to do this only if wait_for_cell.) */
5100 if (read_kbd
== 0 && detect_input_pending ())
5102 swallow_events (do_display
);
5103 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
5104 if (detect_input_pending ())
5109 /* Exit now if the cell we're waiting for became non-nil. */
5110 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
5114 /* If we think we have keyboard input waiting, but didn't get SIGIO,
5115 go read it. This can happen with X on BSD after logging out.
5116 In that case, there really is no input and no SIGIO,
5117 but select says there is input. */
5119 if (read_kbd
&& interrupt_input
5120 && keyboard_bit_set (&Available
) && ! noninteractive
)
5121 kill (getpid (), SIGIO
);
5125 got_some_input
|= nfds
> 0;
5127 /* If checking input just got us a size-change event from X,
5128 obey it now if we should. */
5129 if (read_kbd
|| ! NILP (wait_for_cell
))
5130 do_pending_window_change (0);
5132 /* Check for data from a process. */
5133 if (no_avail
|| nfds
== 0)
5136 /* Really FIRST_PROC_DESC should be 0 on Unix,
5137 but this is safer in the short run. */
5138 for (channel
= 0; channel
<= max_process_desc
; channel
++)
5140 if (FD_ISSET (channel
, &Available
)
5141 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
5145 /* If waiting for this channel, arrange to return as
5146 soon as no more input to be processed. No more
5148 if (wait_channel
== channel
)
5154 proc
= chan_process
[channel
];
5158 /* If this is a server stream socket, accept connection. */
5159 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
5161 server_accept_connection (proc
, channel
);
5165 /* Read data from the process, starting with our
5166 buffered-ahead character if we have one. */
5168 nread
= read_process_output (proc
, channel
);
5171 /* Since read_process_output can run a filter,
5172 which can call accept-process-output,
5173 don't try to read from any other processes
5174 before doing the select again. */
5175 FD_ZERO (&Available
);
5178 redisplay_preserve_echo_area (12);
5181 else if (nread
== -1 && errno
== EWOULDBLOCK
)
5184 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
5185 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
5187 else if (nread
== -1 && errno
== EAGAIN
)
5191 else if (nread
== -1 && errno
== EAGAIN
)
5193 /* Note that we cannot distinguish between no input
5194 available now and a closed pipe.
5195 With luck, a closed pipe will be accompanied by
5196 subprocess termination and SIGCHLD. */
5197 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5199 #endif /* O_NDELAY */
5200 #endif /* O_NONBLOCK */
5202 /* On some OSs with ptys, when the process on one end of
5203 a pty exits, the other end gets an error reading with
5204 errno = EIO instead of getting an EOF (0 bytes read).
5205 Therefore, if we get an error reading and errno =
5206 EIO, just continue, because the child process has
5207 exited and should clean itself up soon (e.g. when we
5210 However, it has been known to happen that the SIGCHLD
5211 got lost. So raise the signal again just in case.
5213 else if (nread
== -1 && errno
== EIO
)
5215 /* Clear the descriptor now, so we only raise the
5216 signal once. Don't do this if `process' is only
5218 if (XPROCESS (proc
)->pid
!= -2)
5220 FD_CLR (channel
, &input_wait_mask
);
5221 FD_CLR (channel
, &non_keyboard_wait_mask
);
5223 kill (getpid (), SIGCHLD
);
5226 #endif /* HAVE_PTYS */
5227 /* If we can detect process termination, don't consider the process
5228 gone just because its pipe is closed. */
5230 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5235 /* Preserve status of processes already terminated. */
5236 XPROCESS (proc
)->tick
= ++process_tick
;
5237 deactivate_process (proc
);
5238 if (XPROCESS (proc
)->raw_status_new
)
5239 update_status (XPROCESS (proc
));
5240 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5241 XPROCESS (proc
)->status
5242 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5245 #ifdef NON_BLOCKING_CONNECT
5246 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
5247 && FD_ISSET (channel
, &connect_wait_mask
))
5249 struct Lisp_Process
*p
;
5251 FD_CLR (channel
, &connect_wait_mask
);
5252 if (--num_pending_connects
< 0)
5255 proc
= chan_process
[channel
];
5259 p
= XPROCESS (proc
);
5262 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5263 So only use it on systems where it is known to work. */
5265 int xlen
= sizeof(xerrno
);
5266 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5271 struct sockaddr pname
;
5272 int pnamelen
= sizeof(pname
);
5274 /* If connection failed, getpeername will fail. */
5276 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
5278 /* Obtain connect failure code through error slippage. */
5281 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
5288 p
->tick
= ++process_tick
;
5289 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
5290 deactivate_process (proc
);
5295 /* Execute the sentinel here. If we had relied on
5296 status_notify to do it later, it will read input
5297 from the process before calling the sentinel. */
5298 exec_sentinel (proc
, build_string ("open\n"));
5299 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5301 FD_SET (p
->infd
, &input_wait_mask
);
5302 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5306 #endif /* NON_BLOCKING_CONNECT */
5307 } /* end for each file descriptor */
5308 } /* end while exit conditions not met */
5310 unbind_to (count
, Qnil
);
5312 /* If calling from keyboard input, do not quit
5313 since we want to return C-g as an input character.
5314 Otherwise, do pending quit if requested. */
5317 /* Prevent input_pending from remaining set if we quit. */
5318 clear_input_pending ();
5322 return got_some_input
;
5325 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5328 read_process_output_call (fun_and_args
)
5329 Lisp_Object fun_and_args
;
5331 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5335 read_process_output_error_handler (error
)
5338 cmd_error_internal (error
, "error in process filter: ");
5340 update_echo_area ();
5341 Fsleep_for (make_number (2), Qnil
);
5345 /* Read pending output from the process channel,
5346 starting with our buffered-ahead character if we have one.
5347 Yield number of decoded characters read.
5349 This function reads at most 4096 characters.
5350 If you want to read all available subprocess output,
5351 you must call it repeatedly until it returns zero.
5353 The characters read are decoded according to PROC's coding-system
5357 read_process_output (proc
, channel
)
5359 register int channel
;
5361 register int nbytes
;
5363 register Lisp_Object outstream
;
5364 register struct Lisp_Process
*p
= XPROCESS (proc
);
5365 register int opoint
;
5366 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5367 int carryover
= p
->decoding_carryover
;
5370 chars
= (char *) alloca (carryover
+ readmax
);
5372 /* See the comment above. */
5373 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
5375 #ifdef DATAGRAM_SOCKETS
5376 /* We have a working select, so proc_buffered_char is always -1. */
5377 if (DATAGRAM_CHAN_P (channel
))
5379 int len
= datagram_address
[channel
].len
;
5380 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5381 0, datagram_address
[channel
].sa
, &len
);
5385 if (proc_buffered_char
[channel
] < 0)
5387 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5388 #ifdef ADAPTIVE_READ_BUFFERING
5389 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5391 int delay
= p
->read_output_delay
;
5394 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5397 process_output_delay_count
++;
5398 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5401 else if (delay
> 0 && (nbytes
== readmax
))
5403 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5405 process_output_delay_count
--;
5407 p
->read_output_delay
= delay
;
5410 p
->read_output_skip
= 1;
5411 process_output_skip
= 1;
5418 chars
[carryover
] = proc_buffered_char
[channel
];
5419 proc_buffered_char
[channel
] = -1;
5420 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5424 nbytes
= nbytes
+ 1;
5427 p
->decoding_carryover
= 0;
5429 /* At this point, NBYTES holds number of bytes just received
5430 (including the one in proc_buffered_char[channel]). */
5433 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5435 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5438 /* Now set NBYTES how many bytes we must decode. */
5439 nbytes
+= carryover
;
5441 /* Read and dispose of the process output. */
5442 outstream
= p
->filter
;
5443 if (!NILP (outstream
))
5445 /* We inhibit quit here instead of just catching it so that
5446 hitting ^G when a filter happens to be running won't screw
5448 int count
= SPECPDL_INDEX ();
5449 Lisp_Object odeactivate
;
5450 Lisp_Object obuffer
, okeymap
;
5452 int outer_running_asynch_code
= running_asynch_code
;
5453 int waiting
= waiting_for_user_input_p
;
5455 /* No need to gcpro these, because all we do with them later
5456 is test them for EQness, and none of them should be a string. */
5457 odeactivate
= Vdeactivate_mark
;
5458 XSETBUFFER (obuffer
, current_buffer
);
5459 okeymap
= current_buffer
->keymap
;
5461 specbind (Qinhibit_quit
, Qt
);
5462 specbind (Qlast_nonmenu_event
, Qt
);
5464 /* In case we get recursively called,
5465 and we already saved the match data nonrecursively,
5466 save the same match data in safely recursive fashion. */
5467 if (outer_running_asynch_code
)
5470 /* Don't clobber the CURRENT match data, either! */
5471 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5472 restore_search_regs ();
5473 record_unwind_save_match_data ();
5474 Fset_match_data (tem
, Qt
);
5477 /* For speed, if a search happens within this code,
5478 save the match data in a special nonrecursive fashion. */
5479 running_asynch_code
= 1;
5481 decode_coding_c_string (coding
, chars
, nbytes
, Qt
);
5482 text
= coding
->dst_object
;
5483 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5484 /* A new coding system might be found. */
5485 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5487 p
->decode_coding_system
= Vlast_coding_system_used
;
5489 /* Don't call setup_coding_system for
5490 proc_decode_coding_system[channel] here. It is done in
5491 detect_coding called via decode_coding above. */
5493 /* If a coding system for encoding is not yet decided, we set
5494 it as the same as coding-system for decoding.
5496 But, before doing that we must check if
5497 proc_encode_coding_system[p->outfd] surely points to a
5498 valid memory because p->outfd will be changed once EOF is
5499 sent to the process. */
5500 if (NILP (p
->encode_coding_system
)
5501 && proc_encode_coding_system
[p
->outfd
])
5503 p
->encode_coding_system
5504 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5505 setup_coding_system (p
->encode_coding_system
,
5506 proc_encode_coding_system
[p
->outfd
]);
5510 if (coding
->carryover_bytes
> 0)
5512 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5513 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5514 bcopy (coding
->carryover
, SDATA (p
->decoding_buf
),
5515 coding
->carryover_bytes
);
5516 p
->decoding_carryover
= coding
->carryover_bytes
;
5518 if (SBYTES (text
) > 0)
5519 internal_condition_case_1 (read_process_output_call
,
5521 Fcons (proc
, Fcons (text
, Qnil
))),
5522 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5523 read_process_output_error_handler
);
5525 /* If we saved the match data nonrecursively, restore it now. */
5526 restore_search_regs ();
5527 running_asynch_code
= outer_running_asynch_code
;
5529 /* Handling the process output should not deactivate the mark. */
5530 Vdeactivate_mark
= odeactivate
;
5532 /* Restore waiting_for_user_input_p as it was
5533 when we were called, in case the filter clobbered it. */
5534 waiting_for_user_input_p
= waiting
;
5536 #if 0 /* Call record_asynch_buffer_change unconditionally,
5537 because we might have changed minor modes or other things
5538 that affect key bindings. */
5539 if (! EQ (Fcurrent_buffer (), obuffer
)
5540 || ! EQ (current_buffer
->keymap
, okeymap
))
5542 /* But do it only if the caller is actually going to read events.
5543 Otherwise there's no need to make him wake up, and it could
5544 cause trouble (for example it would make sit_for return). */
5545 if (waiting_for_user_input_p
== -1)
5546 record_asynch_buffer_change ();
5548 unbind_to (count
, Qnil
);
5552 /* If no filter, write into buffer if it isn't dead. */
5553 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
5555 Lisp_Object old_read_only
;
5556 int old_begv
, old_zv
;
5557 int old_begv_byte
, old_zv_byte
;
5558 Lisp_Object odeactivate
;
5559 int before
, before_byte
;
5563 int count
= SPECPDL_INDEX ();
5565 odeactivate
= Vdeactivate_mark
;
5567 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5568 Fset_buffer (p
->buffer
);
5570 opoint_byte
= PT_BYTE
;
5571 old_read_only
= current_buffer
->read_only
;
5574 old_begv_byte
= BEGV_BYTE
;
5575 old_zv_byte
= ZV_BYTE
;
5577 current_buffer
->read_only
= Qnil
;
5579 /* Insert new output into buffer
5580 at the current end-of-output marker,
5581 thus preserving logical ordering of input and output. */
5582 if (XMARKER (p
->mark
)->buffer
)
5583 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5584 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5587 SET_PT_BOTH (ZV
, ZV_BYTE
);
5589 before_byte
= PT_BYTE
;
5591 /* If the output marker is outside of the visible region, save
5592 the restriction and widen. */
5593 if (! (BEGV
<= PT
&& PT
<= ZV
))
5596 decode_coding_c_string (coding
, chars
, nbytes
, Qt
);
5597 text
= coding
->dst_object
;
5598 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5599 /* A new coding system might be found. See the comment in the
5600 similar code in the previous `if' block. */
5601 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5603 p
->decode_coding_system
= Vlast_coding_system_used
;
5604 if (NILP (p
->encode_coding_system
)
5605 && proc_encode_coding_system
[p
->outfd
])
5607 p
->encode_coding_system
5608 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5609 setup_coding_system (p
->encode_coding_system
,
5610 proc_encode_coding_system
[p
->outfd
]);
5613 if (coding
->carryover_bytes
> 0)
5615 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5616 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5617 bcopy (coding
->carryover
, SDATA (p
->decoding_buf
),
5618 coding
->carryover_bytes
);
5619 p
->decoding_carryover
= coding
->carryover_bytes
;
5621 /* Adjust the multibyteness of TEXT to that of the buffer. */
5622 if (NILP (current_buffer
->enable_multibyte_characters
)
5623 != ! STRING_MULTIBYTE (text
))
5624 text
= (STRING_MULTIBYTE (text
)
5625 ? Fstring_as_unibyte (text
)
5626 : Fstring_to_multibyte (text
));
5627 /* Insert before markers in case we are inserting where
5628 the buffer's mark is, and the user's next command is Meta-y. */
5629 insert_from_string_before_markers (text
, 0, 0,
5630 SCHARS (text
), SBYTES (text
), 0);
5632 /* Make sure the process marker's position is valid when the
5633 process buffer is changed in the signal_after_change above.
5634 W3 is known to do that. */
5635 if (BUFFERP (p
->buffer
)
5636 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5637 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5639 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5641 update_mode_lines
++;
5643 /* Make sure opoint and the old restrictions
5644 float ahead of any new text just as point would. */
5645 if (opoint
>= before
)
5647 opoint
+= PT
- before
;
5648 opoint_byte
+= PT_BYTE
- before_byte
;
5650 if (old_begv
> before
)
5652 old_begv
+= PT
- before
;
5653 old_begv_byte
+= PT_BYTE
- before_byte
;
5655 if (old_zv
>= before
)
5657 old_zv
+= PT
- before
;
5658 old_zv_byte
+= PT_BYTE
- before_byte
;
5661 /* If the restriction isn't what it should be, set it. */
5662 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5663 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5665 /* Handling the process output should not deactivate the mark. */
5666 Vdeactivate_mark
= odeactivate
;
5668 current_buffer
->read_only
= old_read_only
;
5669 SET_PT_BOTH (opoint
, opoint_byte
);
5670 unbind_to (count
, Qnil
);
5675 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5677 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5678 This is intended for use by asynchronous process output filters and sentinels. */)
5681 return (waiting_for_user_input_p
? Qt
: Qnil
);
5684 /* Sending data to subprocess */
5686 jmp_buf send_process_frame
;
5687 Lisp_Object process_sent_to
;
5690 send_process_trap ()
5692 SIGNAL_THREAD_CHECK (SIGPIPE
);
5693 sigunblock (sigmask (SIGPIPE
));
5694 longjmp (send_process_frame
, 1);
5697 /* Send some data to process PROC.
5698 BUF is the beginning of the data; LEN is the number of characters.
5699 OBJECT is the Lisp object that the data comes from. If OBJECT is
5700 nil or t, it means that the data comes from C string.
5702 If OBJECT is not nil, the data is encoded by PROC's coding-system
5703 for encoding before it is sent.
5705 This function can evaluate Lisp code and can garbage collect. */
5708 send_process (proc
, buf
, len
, object
)
5709 volatile Lisp_Object proc
;
5710 unsigned char *volatile buf
;
5712 volatile Lisp_Object object
;
5714 /* Use volatile to protect variables from being clobbered by longjmp. */
5715 struct Lisp_Process
*p
= XPROCESS (proc
);
5717 struct coding_system
*coding
;
5718 struct gcpro gcpro1
;
5719 SIGTYPE (*volatile old_sigpipe
) ();
5723 if (p
->raw_status_new
)
5725 if (! EQ (p
->status
, Qrun
))
5726 error ("Process %s not running", SDATA (p
->name
));
5728 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5730 coding
= proc_encode_coding_system
[p
->outfd
];
5731 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5733 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5734 || (BUFFERP (object
)
5735 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5738 p
->encode_coding_system
5739 = complement_process_encoding_system (p
->encode_coding_system
);
5740 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5742 /* The coding system for encoding was changed to raw-text
5743 because we sent a unibyte text previously. Now we are
5744 sending a multibyte text, thus we must encode it by the
5745 original coding system specified for the current process.
5747 Another reason we comming here is that the coding system
5748 was just complemented and new one was returned by
5749 complement_process_encoding_system. */
5750 setup_coding_system (p
->encode_coding_system
, coding
);
5751 Vlast_coding_system_used
= p
->encode_coding_system
;
5753 coding
->src_multibyte
= 1;
5757 /* For sending a unibyte text, character code conversion should
5758 not take place but EOL conversion should. So, setup raw-text
5759 or one of the subsidiary if we have not yet done it. */
5760 if (CODING_REQUIRE_ENCODING (coding
))
5762 if (CODING_REQUIRE_FLUSHING (coding
))
5764 /* But, before changing the coding, we must flush out data. */
5765 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5766 send_process (proc
, "", 0, Qt
);
5767 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5769 setup_coding_system (raw_text_coding_system
5770 (Vlast_coding_system_used
),
5772 coding
->src_multibyte
= 0;
5775 coding
->dst_multibyte
= 0;
5777 if (CODING_REQUIRE_ENCODING (coding
))
5779 coding
->dst_object
= Qt
;
5780 if (BUFFERP (object
))
5782 int from_byte
, from
, to
;
5783 int save_pt
, save_pt_byte
;
5784 struct buffer
*cur
= current_buffer
;
5786 set_buffer_internal (XBUFFER (object
));
5787 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5789 from_byte
= PTR_BYTE_POS (buf
);
5790 from
= BYTE_TO_CHAR (from_byte
);
5791 to
= BYTE_TO_CHAR (from_byte
+ len
);
5792 TEMP_SET_PT_BOTH (from
, from_byte
);
5793 encode_coding_object (coding
, object
, from
, from_byte
,
5794 to
, from_byte
+ len
, Qt
);
5795 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5796 set_buffer_internal (cur
);
5798 else if (STRINGP (object
))
5800 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5801 SBYTES (object
), Qt
);
5805 coding
->dst_object
= make_unibyte_string (buf
, len
);
5806 coding
->produced
= len
;
5809 len
= coding
->produced
;
5810 object
= coding
->dst_object
;
5811 buf
= SDATA (object
);
5814 if (pty_max_bytes
== 0)
5816 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5817 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5818 if (pty_max_bytes
< 0)
5819 pty_max_bytes
= 250;
5821 pty_max_bytes
= 250;
5823 /* Deduct one, to leave space for the eof. */
5827 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5828 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5829 when returning with longjmp despite being declared volatile. */
5830 if (!setjmp (send_process_frame
))
5832 process_sent_to
= proc
;
5837 /* Decide how much data we can send in one batch.
5838 Long lines need to be split into multiple batches. */
5841 /* Starting this at zero is always correct when not the first
5842 iteration because the previous iteration ended by sending C-d.
5843 It may not be correct for the first iteration
5844 if a partial line was sent in a separate send_process call.
5845 If that proves worth handling, we need to save linepos
5846 in the process object. */
5848 unsigned char *ptr
= (unsigned char *) buf
;
5849 unsigned char *end
= (unsigned char *) buf
+ len
;
5851 /* Scan through this text for a line that is too long. */
5852 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5860 /* If we found one, break the line there
5861 and put in a C-d to force the buffer through. */
5865 /* Send this batch, using one or more write calls. */
5868 int outfd
= p
->outfd
;
5869 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5870 #ifdef DATAGRAM_SOCKETS
5871 if (DATAGRAM_CHAN_P (outfd
))
5873 rv
= sendto (outfd
, (char *) buf
, this,
5874 0, datagram_address
[outfd
].sa
,
5875 datagram_address
[outfd
].len
);
5876 if (rv
< 0 && errno
== EMSGSIZE
)
5878 signal (SIGPIPE
, old_sigpipe
);
5879 report_file_error ("sending datagram",
5880 Fcons (proc
, Qnil
));
5886 rv
= emacs_write (outfd
, (char *) buf
, this);
5887 #ifdef ADAPTIVE_READ_BUFFERING
5888 if (p
->read_output_delay
> 0
5889 && p
->adaptive_read_buffering
== 1)
5891 p
->read_output_delay
= 0;
5892 process_output_delay_count
--;
5893 p
->read_output_skip
= 0;
5897 signal (SIGPIPE
, old_sigpipe
);
5903 || errno
== EWOULDBLOCK
5909 /* Buffer is full. Wait, accepting input;
5910 that may allow the program
5911 to finish doing output and read more. */
5915 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5916 /* A gross hack to work around a bug in FreeBSD.
5917 In the following sequence, read(2) returns
5921 write(2) 954 bytes, get EAGAIN
5922 read(2) 1024 bytes in process_read_output
5923 read(2) 11 bytes in process_read_output
5925 That is, read(2) returns more bytes than have
5926 ever been written successfully. The 1033 bytes
5927 read are the 1022 bytes written successfully
5928 after processing (for example with CRs added if
5929 the terminal is set up that way which it is
5930 here). The same bytes will be seen again in a
5931 later read(2), without the CRs. */
5933 if (errno
== EAGAIN
)
5936 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5938 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5940 /* Running filters might relocate buffers or strings.
5941 Arrange to relocate BUF. */
5942 if (BUFFERP (object
))
5943 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5944 else if (STRINGP (object
))
5945 offset
= buf
- SDATA (object
);
5947 #ifdef EMACS_HAS_USECS
5948 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5950 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5953 if (BUFFERP (object
))
5954 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5955 else if (STRINGP (object
))
5956 buf
= offset
+ SDATA (object
);
5961 /* This is a real error. */
5962 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5969 /* If we sent just part of the string, put in an EOF (C-d)
5970 to force it through, before we send the rest. */
5972 Fprocess_send_eof (proc
);
5977 signal (SIGPIPE
, old_sigpipe
);
5978 proc
= process_sent_to
;
5979 p
= XPROCESS (proc
);
5980 p
->raw_status_new
= 0;
5981 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5982 p
->tick
= ++process_tick
;
5983 deactivate_process (proc
);
5984 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5990 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5992 doc
: /* Send current contents of region as input to PROCESS.
5993 PROCESS may be a process, a buffer, the name of a process or buffer, or
5994 nil, indicating the current buffer's process.
5995 Called from program, takes three arguments, PROCESS, START and END.
5996 If the region is more than 500 characters long,
5997 it is sent in several bunches. This may happen even for shorter regions.
5998 Output from processes can arrive in between bunches. */)
5999 (process
, start
, end
)
6000 Lisp_Object process
, start
, end
;
6005 proc
= get_process (process
);
6006 validate_region (&start
, &end
);
6008 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
6009 move_gap (XINT (start
));
6011 start1
= CHAR_TO_BYTE (XINT (start
));
6012 end1
= CHAR_TO_BYTE (XINT (end
));
6013 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
6014 Fcurrent_buffer ());
6019 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
6021 doc
: /* Send PROCESS the contents of STRING as input.
6022 PROCESS may be a process, a buffer, the name of a process or buffer, or
6023 nil, indicating the current buffer's process.
6024 If STRING is more than 500 characters long,
6025 it is sent in several bunches. This may happen even for shorter strings.
6026 Output from processes can arrive in between bunches. */)
6028 Lisp_Object process
, string
;
6031 CHECK_STRING (string
);
6032 proc
= get_process (process
);
6033 send_process (proc
, SDATA (string
),
6034 SBYTES (string
), string
);
6038 /* Return the foreground process group for the tty/pty that
6039 the process P uses. */
6041 emacs_get_tty_pgrp (p
)
6042 struct Lisp_Process
*p
;
6047 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
6050 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
6051 master side. Try the slave side. */
6052 fd
= emacs_open (SDATA (p
->tty_name
), O_RDONLY
, 0);
6056 ioctl (fd
, TIOCGPGRP
, &gid
);
6060 #endif /* defined (TIOCGPGRP ) */
6065 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
6066 Sprocess_running_child_p
, 0, 1, 0,
6067 doc
: /* Return t if PROCESS has given the terminal to a child.
6068 If the operating system does not make it possible to find out,
6069 return t unconditionally. */)
6071 Lisp_Object process
;
6073 /* Initialize in case ioctl doesn't exist or gives an error,
6074 in a way that will cause returning t. */
6077 struct Lisp_Process
*p
;
6079 proc
= get_process (process
);
6080 p
= XPROCESS (proc
);
6082 if (!EQ (p
->type
, Qreal
))
6083 error ("Process %s is not a subprocess",
6086 error ("Process %s is not active",
6089 gid
= emacs_get_tty_pgrp (p
);
6096 /* send a signal number SIGNO to PROCESS.
6097 If CURRENT_GROUP is t, that means send to the process group
6098 that currently owns the terminal being used to communicate with PROCESS.
6099 This is used for various commands in shell mode.
6100 If CURRENT_GROUP is lambda, that means send to the process group
6101 that currently owns the terminal, but only if it is NOT the shell itself.
6103 If NOMSG is zero, insert signal-announcements into process's buffers
6106 If we can, we try to signal PROCESS by sending control characters
6107 down the pty. This allows us to signal inferiors who have changed
6108 their uid, for which killpg would return an EPERM error. */
6111 process_send_signal (process
, signo
, current_group
, nomsg
)
6112 Lisp_Object process
;
6114 Lisp_Object current_group
;
6118 register struct Lisp_Process
*p
;
6122 proc
= get_process (process
);
6123 p
= XPROCESS (proc
);
6125 if (!EQ (p
->type
, Qreal
))
6126 error ("Process %s is not a subprocess",
6129 error ("Process %s is not active",
6133 current_group
= Qnil
;
6135 /* If we are using pgrps, get a pgrp number and make it negative. */
6136 if (NILP (current_group
))
6137 /* Send the signal to the shell's process group. */
6141 #ifdef SIGNALS_VIA_CHARACTERS
6142 /* If possible, send signals to the entire pgrp
6143 by sending an input character to it. */
6145 /* TERMIOS is the latest and bestest, and seems most likely to
6146 work. If the system has it, use it. */
6149 cc_t
*sig_char
= NULL
;
6151 tcgetattr (p
->infd
, &t
);
6156 sig_char
= &t
.c_cc
[VINTR
];
6160 sig_char
= &t
.c_cc
[VQUIT
];
6164 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
6165 sig_char
= &t
.c_cc
[VSWTCH
];
6167 sig_char
= &t
.c_cc
[VSUSP
];
6172 if (sig_char
&& *sig_char
!= CDISABLE
)
6174 send_process (proc
, sig_char
, 1, Qnil
);
6177 /* If we can't send the signal with a character,
6178 fall through and send it another way. */
6179 #else /* ! HAVE_TERMIOS */
6181 /* On Berkeley descendants, the following IOCTL's retrieve the
6182 current control characters. */
6183 #if defined (TIOCGLTC) && defined (TIOCGETC)
6191 ioctl (p
->infd
, TIOCGETC
, &c
);
6192 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
6195 ioctl (p
->infd
, TIOCGETC
, &c
);
6196 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
6200 ioctl (p
->infd
, TIOCGLTC
, &lc
);
6201 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
6203 #endif /* ! defined (SIGTSTP) */
6206 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6208 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
6215 ioctl (p
->infd
, TCGETA
, &t
);
6216 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
6219 ioctl (p
->infd
, TCGETA
, &t
);
6220 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
6224 ioctl (p
->infd
, TCGETA
, &t
);
6225 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
6227 #endif /* ! defined (SIGTSTP) */
6229 #else /* ! defined (TCGETA) */
6230 Your configuration files are messed up
.
6231 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
6232 you'd better be using one of the alternatives above! */
6233 #endif /* ! defined (TCGETA) */
6234 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6235 /* In this case, the code above should alway return. */
6237 #endif /* ! defined HAVE_TERMIOS */
6239 /* The code above may fall through if it can't
6240 handle the signal. */
6241 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6244 /* Get the current pgrp using the tty itself, if we have that.
6245 Otherwise, use the pty to get the pgrp.
6246 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6247 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6248 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6249 His patch indicates that if TIOCGPGRP returns an error, then
6250 we should just assume that p->pid is also the process group id. */
6252 gid
= emacs_get_tty_pgrp (p
);
6255 /* If we can't get the information, assume
6256 the shell owns the tty. */
6259 /* It is not clear whether anything really can set GID to -1.
6260 Perhaps on some system one of those ioctls can or could do so.
6261 Or perhaps this is vestigial. */
6264 #else /* ! defined (TIOCGPGRP ) */
6265 /* Can't select pgrps on this system, so we know that
6266 the child itself heads the pgrp. */
6268 #endif /* ! defined (TIOCGPGRP ) */
6270 /* If current_group is lambda, and the shell owns the terminal,
6271 don't send any signal. */
6272 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6280 p
->raw_status_new
= 0;
6282 p
->tick
= ++process_tick
;
6285 status_notify (NULL
);
6286 redisplay_preserve_echo_area (13);
6289 #endif /* ! defined (SIGCONT) */
6293 flush_pending_output (p
->infd
);
6297 /* If we don't have process groups, send the signal to the immediate
6298 subprocess. That isn't really right, but it's better than any
6299 obvious alternative. */
6302 kill (p
->pid
, signo
);
6306 /* gid may be a pid, or minus a pgrp's number */
6308 if (!NILP (current_group
))
6310 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6311 EMACS_KILLPG (gid
, signo
);
6318 #else /* ! defined (TIOCSIGSEND) */
6319 EMACS_KILLPG (gid
, signo
);
6320 #endif /* ! defined (TIOCSIGSEND) */
6323 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6324 doc
: /* Interrupt process PROCESS.
6325 PROCESS may be a process, a buffer, or the name of a process or buffer.
6326 No arg or nil means current buffer's process.
6327 Second arg CURRENT-GROUP non-nil means send signal to
6328 the current process-group of the process's controlling terminal
6329 rather than to the process's own process group.
6330 If the process is a shell, this means interrupt current subjob
6331 rather than the shell.
6333 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6334 don't send the signal. */)
6335 (process
, current_group
)
6336 Lisp_Object process
, current_group
;
6338 process_send_signal (process
, SIGINT
, current_group
, 0);
6342 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6343 doc
: /* Kill process PROCESS. May be process or name of one.
6344 See function `interrupt-process' for more details on usage. */)
6345 (process
, current_group
)
6346 Lisp_Object process
, current_group
;
6348 process_send_signal (process
, SIGKILL
, current_group
, 0);
6352 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6353 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6354 See function `interrupt-process' for more details on usage. */)
6355 (process
, current_group
)
6356 Lisp_Object process
, current_group
;
6358 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6362 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6363 doc
: /* Stop process PROCESS. May be process or name of one.
6364 See function `interrupt-process' for more details on usage.
6365 If PROCESS is a network or serial process, inhibit handling of incoming
6367 (process
, current_group
)
6368 Lisp_Object process
, current_group
;
6371 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6373 struct Lisp_Process
*p
;
6375 p
= XPROCESS (process
);
6376 if (NILP (p
->command
)
6379 FD_CLR (p
->infd
, &input_wait_mask
);
6380 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6387 error ("No SIGTSTP support");
6389 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6394 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6395 doc
: /* Continue process PROCESS. May be process or name of one.
6396 See function `interrupt-process' for more details on usage.
6397 If PROCESS is a network or serial process, resume handling of incoming
6399 (process
, current_group
)
6400 Lisp_Object process
, current_group
;
6403 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6405 struct Lisp_Process
*p
;
6407 p
= XPROCESS (process
);
6408 if (EQ (p
->command
, Qt
)
6410 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6412 FD_SET (p
->infd
, &input_wait_mask
);
6413 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6415 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6416 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6419 tcflush (p
->infd
, TCIFLUSH
);
6427 process_send_signal (process
, SIGCONT
, current_group
, 0);
6429 error ("No SIGCONT support");
6434 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6435 2, 2, "sProcess (name or number): \nnSignal code: ",
6436 doc
: /* Send PROCESS the signal with code SIGCODE.
6437 PROCESS may also be a number specifying the process id of the
6438 process to signal; in this case, the process need not be a child of
6440 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6442 Lisp_Object process
, sigcode
;
6446 if (INTEGERP (process
))
6448 pid
= XINT (process
);
6452 if (FLOATP (process
))
6454 pid
= (pid_t
) XFLOAT_DATA (process
);
6458 if (STRINGP (process
))
6461 if (tem
= Fget_process (process
), NILP (tem
))
6463 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6470 process
= get_process (process
);
6475 CHECK_PROCESS (process
);
6476 pid
= XPROCESS (process
)->pid
;
6478 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6482 #define parse_signal(NAME, VALUE) \
6483 else if (!xstrcasecmp (name, NAME)) \
6484 XSETINT (sigcode, VALUE)
6486 if (INTEGERP (sigcode
))
6490 unsigned char *name
;
6492 CHECK_SYMBOL (sigcode
);
6493 name
= SDATA (SYMBOL_NAME (sigcode
));
6495 if (!strncmp(name
, "SIG", 3) || !strncmp(name
, "sig", 3))
6501 parse_signal ("usr1", SIGUSR1
);
6504 parse_signal ("usr2", SIGUSR2
);
6507 parse_signal ("term", SIGTERM
);
6510 parse_signal ("hup", SIGHUP
);
6513 parse_signal ("int", SIGINT
);
6516 parse_signal ("quit", SIGQUIT
);
6519 parse_signal ("ill", SIGILL
);
6522 parse_signal ("abrt", SIGABRT
);
6525 parse_signal ("emt", SIGEMT
);
6528 parse_signal ("kill", SIGKILL
);
6531 parse_signal ("fpe", SIGFPE
);
6534 parse_signal ("bus", SIGBUS
);
6537 parse_signal ("segv", SIGSEGV
);
6540 parse_signal ("sys", SIGSYS
);
6543 parse_signal ("pipe", SIGPIPE
);
6546 parse_signal ("alrm", SIGALRM
);
6549 parse_signal ("urg", SIGURG
);
6552 parse_signal ("stop", SIGSTOP
);
6555 parse_signal ("tstp", SIGTSTP
);
6558 parse_signal ("cont", SIGCONT
);
6561 parse_signal ("chld", SIGCHLD
);
6564 parse_signal ("ttin", SIGTTIN
);
6567 parse_signal ("ttou", SIGTTOU
);
6570 parse_signal ("io", SIGIO
);
6573 parse_signal ("xcpu", SIGXCPU
);
6576 parse_signal ("xfsz", SIGXFSZ
);
6579 parse_signal ("vtalrm", SIGVTALRM
);
6582 parse_signal ("prof", SIGPROF
);
6585 parse_signal ("winch", SIGWINCH
);
6588 parse_signal ("info", SIGINFO
);
6591 error ("Undefined signal name %s", name
);
6596 return make_number (kill (pid
, XINT (sigcode
)));
6599 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6600 doc
: /* Make PROCESS see end-of-file in its input.
6601 EOF comes after any text already sent to it.
6602 PROCESS may be a process, a buffer, the name of a process or buffer, or
6603 nil, indicating the current buffer's process.
6604 If PROCESS is a network connection, or is a process communicating
6605 through a pipe (as opposed to a pty), then you cannot send any more
6606 text to PROCESS after you call this function.
6607 If PROCESS is a serial process, wait until all output written to the
6608 process has been transmitted to the serial port. */)
6610 Lisp_Object process
;
6613 struct coding_system
*coding
;
6615 if (DATAGRAM_CONN_P (process
))
6618 proc
= get_process (process
);
6619 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6621 /* Make sure the process is really alive. */
6622 if (XPROCESS (proc
)->raw_status_new
)
6623 update_status (XPROCESS (proc
));
6624 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6625 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6627 if (CODING_REQUIRE_FLUSHING (coding
))
6629 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6630 send_process (proc
, "", 0, Qnil
);
6633 if (XPROCESS (proc
)->pty_flag
)
6634 send_process (proc
, "\004", 1, Qnil
);
6635 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6638 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6639 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6641 /* Do nothing on Windows because writes are blocking. */
6645 int old_outfd
, new_outfd
;
6647 #ifdef HAVE_SHUTDOWN
6648 /* If this is a network connection, or socketpair is used
6649 for communication with the subprocess, call shutdown to cause EOF.
6650 (In some old system, shutdown to socketpair doesn't work.
6651 Then we just can't win.) */
6652 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6653 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6654 shutdown (XPROCESS (proc
)->outfd
, 1);
6655 /* In case of socketpair, outfd == infd, so don't close it. */
6656 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6657 emacs_close (XPROCESS (proc
)->outfd
);
6658 #else /* not HAVE_SHUTDOWN */
6659 emacs_close (XPROCESS (proc
)->outfd
);
6660 #endif /* not HAVE_SHUTDOWN */
6661 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6664 old_outfd
= XPROCESS (proc
)->outfd
;
6666 if (!proc_encode_coding_system
[new_outfd
])
6667 proc_encode_coding_system
[new_outfd
]
6668 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6669 bcopy (proc_encode_coding_system
[old_outfd
],
6670 proc_encode_coding_system
[new_outfd
],
6671 sizeof (struct coding_system
));
6672 bzero (proc_encode_coding_system
[old_outfd
],
6673 sizeof (struct coding_system
));
6675 XPROCESS (proc
)->outfd
= new_outfd
;
6680 /* Kill all processes associated with `buffer'.
6681 If `buffer' is nil, kill all processes */
6684 kill_buffer_processes (buffer
)
6687 Lisp_Object tail
, proc
;
6689 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6691 proc
= XCDR (XCAR (tail
));
6693 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6695 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
6696 Fdelete_process (proc
);
6697 else if (XPROCESS (proc
)->infd
>= 0)
6698 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6703 /* On receipt of a signal that a child status has changed, loop asking
6704 about children with changed statuses until the system says there
6707 All we do is change the status; we do not run sentinels or print
6708 notifications. That is saved for the next time keyboard input is
6709 done, in order to avoid timing errors.
6711 ** WARNING: this can be called during garbage collection.
6712 Therefore, it must not be fooled by the presence of mark bits in
6715 ** USG WARNING: Although it is not obvious from the documentation
6716 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6717 signal() before executing at least one wait(), otherwise the
6718 handler will be called again, resulting in an infinite loop. The
6719 relevant portion of the documentation reads "SIGCLD signals will be
6720 queued and the signal-catching function will be continually
6721 reentered until the queue is empty". Invoking signal() causes the
6722 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6725 ** Malloc WARNING: This should never call malloc either directly or
6726 indirectly; if it does, that is a bug */
6730 sigchld_handler (signo
)
6733 int old_errno
= errno
;
6735 register struct Lisp_Process
*p
;
6736 extern EMACS_TIME
*input_available_clear_time
;
6738 SIGNAL_THREAD_CHECK (signo
);
6749 #endif /* no WUNTRACED */
6750 /* Keep trying to get a status until we get a definitive result. */
6754 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6756 while (pid
< 0 && errno
== EINTR
);
6760 /* PID == 0 means no processes found, PID == -1 means a real
6761 failure. We have done all our job, so return. */
6763 /* USG systems forget handlers when they are used;
6764 must reestablish each time */
6765 #if defined (USG) && !defined (POSIX_SIGNALS)
6766 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6773 #endif /* no WNOHANG */
6775 /* Find the process that signaled us, and record its status. */
6777 /* The process can have been deleted by Fdelete_process. */
6778 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6780 Lisp_Object xpid
= XCAR (tail
);
6781 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6782 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6784 XSETCAR (tail
, Qnil
);
6785 goto sigchld_end_of_loop
;
6789 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6791 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6793 proc
= XCDR (XCAR (tail
));
6794 p
= XPROCESS (proc
);
6795 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6800 /* Look for an asynchronous process whose pid hasn't been filled
6803 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6805 proc
= XCDR (XCAR (tail
));
6806 p
= XPROCESS (proc
);
6812 /* Change the status of the process that was found. */
6815 int clear_desc_flag
= 0;
6817 p
->tick
= ++process_tick
;
6819 p
->raw_status_new
= 1;
6821 /* If process has terminated, stop waiting for its output. */
6822 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6824 clear_desc_flag
= 1;
6826 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6827 if (clear_desc_flag
)
6829 FD_CLR (p
->infd
, &input_wait_mask
);
6830 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6833 /* Tell wait_reading_process_output that it needs to wake up and
6835 if (input_available_clear_time
)
6836 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6839 /* There was no asynchronous process found for that pid: we have
6840 a synchronous process. */
6843 synch_process_alive
= 0;
6845 /* Report the status of the synchronous process. */
6847 synch_process_retcode
= WRETCODE (w
);
6848 else if (WIFSIGNALED (w
))
6849 synch_process_termsig
= WTERMSIG (w
);
6851 /* Tell wait_reading_process_output that it needs to wake up and
6853 if (input_available_clear_time
)
6854 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6857 sigchld_end_of_loop
:
6860 /* On some systems, we must return right away.
6861 If any more processes want to signal us, we will
6863 Otherwise (on systems that have WNOHANG), loop around
6864 to use up all the processes that have something to tell us. */
6865 #if (defined WINDOWSNT \
6866 || (defined USG && !defined GNU_LINUX \
6867 && !(defined HPUX && defined WNOHANG)))
6868 #if defined (USG) && ! defined (POSIX_SIGNALS)
6869 signal (signo
, sigchld_handler
);
6873 #endif /* USG, but not HPUX with WNOHANG */
6876 #endif /* SIGCHLD */
6880 exec_sentinel_unwind (data
)
6883 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6888 exec_sentinel_error_handler (error
)
6891 cmd_error_internal (error
, "error in process sentinel: ");
6893 update_echo_area ();
6894 Fsleep_for (make_number (2), Qnil
);
6899 exec_sentinel (proc
, reason
)
6900 Lisp_Object proc
, reason
;
6902 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6903 register struct Lisp_Process
*p
= XPROCESS (proc
);
6904 int count
= SPECPDL_INDEX ();
6905 int outer_running_asynch_code
= running_asynch_code
;
6906 int waiting
= waiting_for_user_input_p
;
6908 if (inhibit_sentinels
)
6911 /* No need to gcpro these, because all we do with them later
6912 is test them for EQness, and none of them should be a string. */
6913 odeactivate
= Vdeactivate_mark
;
6914 XSETBUFFER (obuffer
, current_buffer
);
6915 okeymap
= current_buffer
->keymap
;
6917 sentinel
= p
->sentinel
;
6918 if (NILP (sentinel
))
6921 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6922 assure that it gets restored no matter how the sentinel exits. */
6924 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6925 /* Inhibit quit so that random quits don't screw up a running filter. */
6926 specbind (Qinhibit_quit
, Qt
);
6927 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6929 /* In case we get recursively called,
6930 and we already saved the match data nonrecursively,
6931 save the same match data in safely recursive fashion. */
6932 if (outer_running_asynch_code
)
6935 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6936 restore_search_regs ();
6937 record_unwind_save_match_data ();
6938 Fset_match_data (tem
, Qt
);
6941 /* For speed, if a search happens within this code,
6942 save the match data in a special nonrecursive fashion. */
6943 running_asynch_code
= 1;
6945 internal_condition_case_1 (read_process_output_call
,
6947 Fcons (proc
, Fcons (reason
, Qnil
))),
6948 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6949 exec_sentinel_error_handler
);
6951 /* If we saved the match data nonrecursively, restore it now. */
6952 restore_search_regs ();
6953 running_asynch_code
= outer_running_asynch_code
;
6955 Vdeactivate_mark
= odeactivate
;
6957 /* Restore waiting_for_user_input_p as it was
6958 when we were called, in case the filter clobbered it. */
6959 waiting_for_user_input_p
= waiting
;
6962 if (! EQ (Fcurrent_buffer (), obuffer
)
6963 || ! EQ (current_buffer
->keymap
, okeymap
))
6965 /* But do it only if the caller is actually going to read events.
6966 Otherwise there's no need to make him wake up, and it could
6967 cause trouble (for example it would make sit_for return). */
6968 if (waiting_for_user_input_p
== -1)
6969 record_asynch_buffer_change ();
6971 unbind_to (count
, Qnil
);
6974 /* Report all recent events of a change in process status
6975 (either run the sentinel or output a message).
6976 This is usually done while Emacs is waiting for keyboard input
6977 but can be done at other times. */
6980 status_notify (deleting_process
)
6981 struct Lisp_Process
*deleting_process
;
6983 register Lisp_Object proc
, buffer
;
6984 Lisp_Object tail
, msg
;
6985 struct gcpro gcpro1
, gcpro2
;
6989 /* We need to gcpro tail; if read_process_output calls a filter
6990 which deletes a process and removes the cons to which tail points
6991 from Vprocess_alist, and then causes a GC, tail is an unprotected
6995 /* Set this now, so that if new processes are created by sentinels
6996 that we run, we get called again to handle their status changes. */
6997 update_tick
= process_tick
;
6999 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7002 register struct Lisp_Process
*p
;
7004 proc
= Fcdr (XCAR (tail
));
7005 p
= XPROCESS (proc
);
7007 if (p
->tick
!= p
->update_tick
)
7009 p
->update_tick
= p
->tick
;
7011 /* If process is still active, read any output that remains. */
7012 while (! EQ (p
->filter
, Qt
)
7013 && ! EQ (p
->status
, Qconnect
)
7014 && ! EQ (p
->status
, Qlisten
)
7015 /* Network or serial process not stopped: */
7016 && ! EQ (p
->command
, Qt
)
7018 && p
!= deleting_process
7019 && read_process_output (proc
, p
->infd
) > 0);
7023 /* Get the text to use for the message. */
7024 if (p
->raw_status_new
)
7026 msg
= status_message (p
);
7028 /* If process is terminated, deactivate it or delete it. */
7030 if (CONSP (p
->status
))
7031 symbol
= XCAR (p
->status
);
7033 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
7034 || EQ (symbol
, Qclosed
))
7036 if (delete_exited_processes
)
7037 remove_process (proc
);
7039 deactivate_process (proc
);
7042 /* The actions above may have further incremented p->tick.
7043 So set p->update_tick again
7044 so that an error in the sentinel will not cause
7045 this code to be run again. */
7046 p
->update_tick
= p
->tick
;
7047 /* Now output the message suitably. */
7048 if (!NILP (p
->sentinel
))
7049 exec_sentinel (proc
, msg
);
7050 /* Don't bother with a message in the buffer
7051 when a process becomes runnable. */
7052 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
7054 Lisp_Object ro
, tem
;
7055 struct buffer
*old
= current_buffer
;
7056 int opoint
, opoint_byte
;
7057 int before
, before_byte
;
7059 ro
= XBUFFER (buffer
)->read_only
;
7061 /* Avoid error if buffer is deleted
7062 (probably that's why the process is dead, too) */
7063 if (NILP (XBUFFER (buffer
)->name
))
7065 Fset_buffer (buffer
);
7068 opoint_byte
= PT_BYTE
;
7069 /* Insert new output into buffer
7070 at the current end-of-output marker,
7071 thus preserving logical ordering of input and output. */
7072 if (XMARKER (p
->mark
)->buffer
)
7073 Fgoto_char (p
->mark
);
7075 SET_PT_BOTH (ZV
, ZV_BYTE
);
7078 before_byte
= PT_BYTE
;
7080 tem
= current_buffer
->read_only
;
7081 current_buffer
->read_only
= Qnil
;
7082 insert_string ("\nProcess ");
7083 Finsert (1, &p
->name
);
7084 insert_string (" ");
7086 current_buffer
->read_only
= tem
;
7087 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
7089 if (opoint
>= before
)
7090 SET_PT_BOTH (opoint
+ (PT
- before
),
7091 opoint_byte
+ (PT_BYTE
- before_byte
));
7093 SET_PT_BOTH (opoint
, opoint_byte
);
7095 set_buffer_internal (old
);
7100 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
7105 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
7106 Sset_process_coding_system
, 1, 3, 0,
7107 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
7108 DECODING will be used to decode subprocess output and ENCODING to
7109 encode subprocess input. */)
7110 (process
, decoding
, encoding
)
7111 register Lisp_Object process
, decoding
, encoding
;
7113 register struct Lisp_Process
*p
;
7115 CHECK_PROCESS (process
);
7116 p
= XPROCESS (process
);
7118 error ("Input file descriptor of %s closed", SDATA (p
->name
));
7120 error ("Output file descriptor of %s closed", SDATA (p
->name
));
7121 Fcheck_coding_system (decoding
);
7122 Fcheck_coding_system (encoding
);
7123 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
7124 p
->decode_coding_system
= decoding
;
7125 p
->encode_coding_system
= encoding
;
7126 setup_process_coding_systems (process
);
7131 DEFUN ("process-coding-system",
7132 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
7133 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
7135 register Lisp_Object process
;
7137 CHECK_PROCESS (process
);
7138 return Fcons (XPROCESS (process
)->decode_coding_system
,
7139 XPROCESS (process
)->encode_coding_system
);
7142 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
7143 Sset_process_filter_multibyte
, 2, 2, 0,
7144 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
7145 If FLAG is non-nil, the filter is given multibyte strings.
7146 If FLAG is nil, the filter is given unibyte strings. In this case,
7147 all character code conversion except for end-of-line conversion is
7150 Lisp_Object process
, flag
;
7152 register struct Lisp_Process
*p
;
7154 CHECK_PROCESS (process
);
7155 p
= XPROCESS (process
);
7157 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
7158 setup_process_coding_systems (process
);
7163 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
7164 Sprocess_filter_multibyte_p
, 1, 1, 0,
7165 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
7167 Lisp_Object process
;
7169 register struct Lisp_Process
*p
;
7170 struct coding_system
*coding
;
7172 CHECK_PROCESS (process
);
7173 p
= XPROCESS (process
);
7174 coding
= proc_decode_coding_system
[p
->infd
];
7175 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
7180 /* Add DESC to the set of keyboard input descriptors. */
7183 add_keyboard_wait_descriptor (desc
)
7186 FD_SET (desc
, &input_wait_mask
);
7187 FD_SET (desc
, &non_process_wait_mask
);
7188 if (desc
> max_keyboard_desc
)
7189 max_keyboard_desc
= desc
;
7192 static int add_gpm_wait_descriptor_called_flag
;
7195 add_gpm_wait_descriptor (desc
)
7198 if (! add_gpm_wait_descriptor_called_flag
)
7199 FD_CLR (0, &input_wait_mask
);
7200 add_gpm_wait_descriptor_called_flag
= 1;
7201 FD_SET (desc
, &input_wait_mask
);
7202 FD_SET (desc
, &gpm_wait_mask
);
7203 if (desc
> max_gpm_desc
)
7204 max_gpm_desc
= desc
;
7207 /* From now on, do not expect DESC to give keyboard input. */
7210 delete_keyboard_wait_descriptor (desc
)
7214 int lim
= max_keyboard_desc
;
7216 FD_CLR (desc
, &input_wait_mask
);
7217 FD_CLR (desc
, &non_process_wait_mask
);
7219 if (desc
== max_keyboard_desc
)
7220 for (fd
= 0; fd
< lim
; fd
++)
7221 if (FD_ISSET (fd
, &input_wait_mask
)
7222 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7223 && !FD_ISSET (fd
, &gpm_wait_mask
))
7224 max_keyboard_desc
= fd
;
7228 delete_gpm_wait_descriptor (desc
)
7232 int lim
= max_gpm_desc
;
7234 FD_CLR (desc
, &input_wait_mask
);
7235 FD_CLR (desc
, &non_process_wait_mask
);
7237 if (desc
== max_gpm_desc
)
7238 for (fd
= 0; fd
< lim
; fd
++)
7239 if (FD_ISSET (fd
, &input_wait_mask
)
7240 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7241 && !FD_ISSET (fd
, &non_process_wait_mask
))
7245 /* Return nonzero if *MASK has a bit set
7246 that corresponds to one of the keyboard input descriptors. */
7249 keyboard_bit_set (mask
)
7254 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
7255 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7256 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7262 /* Stop reading input from keyboard sources. */
7265 hold_keyboard_input (void)
7270 /* Resume reading input from keyboard sources. */
7273 unhold_keyboard_input (void)
7278 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7281 kbd_on_hold_p (void)
7283 return kbd_is_on_hold
;
7287 /* Enumeration of and access to system processes a-la ps(1). */
7289 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7291 doc
: /* Return a list of numerical process IDs of all running processes.
7292 If this functionality is unsupported, return nil.
7294 See `process-attributes' for getting attributes of a process given its ID. */)
7297 return list_system_processes ();
7300 DEFUN ("process-attributes", Fprocess_attributes
,
7301 Sprocess_attributes
, 1, 1, 0,
7302 doc
: /* Return attributes of the process given by its PID, a number.
7304 Value is an alist where each element is a cons cell of the form
7308 If this functionality is unsupported, the value is nil.
7310 See `list-system-processes' for getting a list of all process IDs.
7312 The KEYs of the attributes that this function may return are listed
7313 below, together with the type of the associated VALUE (in parentheses).
7314 Not all platforms support all of these attributes; unsupported
7315 attributes will not appear in the returned alist.
7316 Unless explicitly indicated otherwise, numbers can have either
7317 integer or floating point values.
7319 euid -- Effective user User ID of the process (number)
7320 user -- User name corresponding to euid (string)
7321 egid -- Effective user Group ID of the process (number)
7322 group -- Group name corresponding to egid (string)
7323 comm -- Command name (executable name only) (string)
7324 state -- Process state code, such as "S", "R", or "T" (string)
7325 ppid -- Parent process ID (number)
7326 pgrp -- Process group ID (number)
7327 sess -- Session ID, i.e. process ID of session leader (number)
7328 ttname -- Controlling tty name (string)
7329 tpgid -- ID of foreground process group on the process's tty (number)
7330 minflt -- number of minor page faults (number)
7331 majflt -- number of major page faults (number)
7332 cminflt -- cumulative number of minor page faults (number)
7333 cmajflt -- cumulative number of major page faults (number)
7334 utime -- user time used by the process, in the (HIGH LOW USEC) format
7335 stime -- system time used by the process, in the (HIGH LOW USEC) format
7336 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7337 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7338 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7339 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7340 pri -- priority of the process (number)
7341 nice -- nice value of the process (number)
7342 thcount -- process thread count (number)
7343 start -- time the process started, in the (HIGH LOW USEC) format
7344 vsize -- virtual memory size of the process in KB's (number)
7345 rss -- resident set size of the process in KB's (number)
7346 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7347 pcpu -- percents of CPU time used by the process (floating-point number)
7348 pmem -- percents of total physical memory used by process's resident set
7349 (floating-point number)
7350 args -- command line which invoked the process (string). */)
7355 return system_process_attributes (pid
);
7363 inhibit_sentinels
= 0;
7367 if (! noninteractive
|| initialized
)
7369 signal (SIGCHLD
, sigchld_handler
);
7372 FD_ZERO (&input_wait_mask
);
7373 FD_ZERO (&non_keyboard_wait_mask
);
7374 FD_ZERO (&non_process_wait_mask
);
7375 max_process_desc
= 0;
7377 #ifdef NON_BLOCKING_CONNECT
7378 FD_ZERO (&connect_wait_mask
);
7379 num_pending_connects
= 0;
7382 #ifdef ADAPTIVE_READ_BUFFERING
7383 process_output_delay_count
= 0;
7384 process_output_skip
= 0;
7387 /* Don't do this, it caused infinite select loops. The display
7388 method should call add_keyboard_wait_descriptor on stdin if it
7391 FD_SET (0, &input_wait_mask
);
7394 Vprocess_alist
= Qnil
;
7396 deleted_pid_list
= Qnil
;
7398 for (i
= 0; i
< MAXDESC
; i
++)
7400 chan_process
[i
] = Qnil
;
7401 proc_buffered_char
[i
] = -1;
7403 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
7404 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
7405 #ifdef DATAGRAM_SOCKETS
7406 bzero (datagram_address
, sizeof datagram_address
);
7411 Lisp_Object subfeatures
= Qnil
;
7412 const struct socket_options
*sopt
;
7414 #define ADD_SUBFEATURE(key, val) \
7415 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7417 #ifdef NON_BLOCKING_CONNECT
7418 ADD_SUBFEATURE (QCnowait
, Qt
);
7420 #ifdef DATAGRAM_SOCKETS
7421 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7423 #ifdef HAVE_SEQPACKET
7424 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7426 #ifdef HAVE_LOCAL_SOCKETS
7427 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7429 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7431 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7433 #ifdef HAVE_GETSOCKNAME
7434 ADD_SUBFEATURE (QCservice
, Qt
);
7436 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7437 ADD_SUBFEATURE (QCserver
, Qt
);
7440 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7441 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7443 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7445 #endif /* HAVE_SOCKETS */
7447 #if defined (DARWIN_OS)
7448 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7449 processes. As such, we only change the default value. */
7452 char *release
= get_operating_system_release();
7453 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7454 && release
[1] == '.')) {
7455 Vprocess_connection_type
= Qnil
;
7464 Qprocessp
= intern_c_string ("processp");
7465 staticpro (&Qprocessp
);
7466 Qrun
= intern_c_string ("run");
7468 Qstop
= intern_c_string ("stop");
7470 Qsignal
= intern_c_string ("signal");
7471 staticpro (&Qsignal
);
7473 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7476 Qexit = intern_c_string ("exit");
7477 staticpro (&Qexit); */
7479 Qopen
= intern_c_string ("open");
7481 Qclosed
= intern_c_string ("closed");
7482 staticpro (&Qclosed
);
7483 Qconnect
= intern_c_string ("connect");
7484 staticpro (&Qconnect
);
7485 Qfailed
= intern_c_string ("failed");
7486 staticpro (&Qfailed
);
7487 Qlisten
= intern_c_string ("listen");
7488 staticpro (&Qlisten
);
7489 Qlocal
= intern_c_string ("local");
7490 staticpro (&Qlocal
);
7491 Qipv4
= intern_c_string ("ipv4");
7494 Qipv6
= intern_c_string ("ipv6");
7497 Qdatagram
= intern_c_string ("datagram");
7498 staticpro (&Qdatagram
);
7499 Qseqpacket
= intern_c_string ("seqpacket");
7500 staticpro (&Qseqpacket
);
7502 QCport
= intern_c_string (":port");
7503 staticpro (&QCport
);
7504 QCspeed
= intern_c_string (":speed");
7505 staticpro (&QCspeed
);
7506 QCprocess
= intern_c_string (":process");
7507 staticpro (&QCprocess
);
7509 QCbytesize
= intern_c_string (":bytesize");
7510 staticpro (&QCbytesize
);
7511 QCstopbits
= intern_c_string (":stopbits");
7512 staticpro (&QCstopbits
);
7513 QCparity
= intern_c_string (":parity");
7514 staticpro (&QCparity
);
7515 Qodd
= intern_c_string ("odd");
7517 Qeven
= intern_c_string ("even");
7519 QCflowcontrol
= intern_c_string (":flowcontrol");
7520 staticpro (&QCflowcontrol
);
7521 Qhw
= intern_c_string ("hw");
7523 Qsw
= intern_c_string ("sw");
7525 QCsummary
= intern_c_string (":summary");
7526 staticpro (&QCsummary
);
7528 Qreal
= intern_c_string ("real");
7530 Qnetwork
= intern_c_string ("network");
7531 staticpro (&Qnetwork
);
7532 Qserial
= intern_c_string ("serial");
7533 staticpro (&Qserial
);
7535 QCname
= intern_c_string (":name");
7536 staticpro (&QCname
);
7537 QCbuffer
= intern_c_string (":buffer");
7538 staticpro (&QCbuffer
);
7539 QChost
= intern_c_string (":host");
7540 staticpro (&QChost
);
7541 QCservice
= intern_c_string (":service");
7542 staticpro (&QCservice
);
7543 QCtype
= intern_c_string (":type");
7544 staticpro (&QCtype
);
7545 QClocal
= intern_c_string (":local");
7546 staticpro (&QClocal
);
7547 QCremote
= intern_c_string (":remote");
7548 staticpro (&QCremote
);
7549 QCcoding
= intern_c_string (":coding");
7550 staticpro (&QCcoding
);
7551 QCserver
= intern_c_string (":server");
7552 staticpro (&QCserver
);
7553 QCnowait
= intern_c_string (":nowait");
7554 staticpro (&QCnowait
);
7555 QCsentinel
= intern_c_string (":sentinel");
7556 staticpro (&QCsentinel
);
7557 QClog
= intern_c_string (":log");
7559 QCnoquery
= intern_c_string (":noquery");
7560 staticpro (&QCnoquery
);
7561 QCstop
= intern_c_string (":stop");
7562 staticpro (&QCstop
);
7563 QCoptions
= intern_c_string (":options");
7564 staticpro (&QCoptions
);
7565 QCplist
= intern_c_string (":plist");
7566 staticpro (&QCplist
);
7568 Qlast_nonmenu_event
= intern_c_string ("last-nonmenu-event");
7569 staticpro (&Qlast_nonmenu_event
);
7571 staticpro (&Vprocess_alist
);
7573 staticpro (&deleted_pid_list
);
7576 Qeuid
= intern_c_string ("euid");
7578 Qegid
= intern_c_string ("egid");
7580 Quser
= intern_c_string ("user");
7582 Qgroup
= intern_c_string ("group");
7583 staticpro (&Qgroup
);
7584 Qcomm
= intern_c_string ("comm");
7586 Qstate
= intern_c_string ("state");
7587 staticpro (&Qstate
);
7588 Qppid
= intern_c_string ("ppid");
7590 Qpgrp
= intern_c_string ("pgrp");
7592 Qsess
= intern_c_string ("sess");
7594 Qttname
= intern_c_string ("ttname");
7595 staticpro (&Qttname
);
7596 Qtpgid
= intern_c_string ("tpgid");
7597 staticpro (&Qtpgid
);
7598 Qminflt
= intern_c_string ("minflt");
7599 staticpro (&Qminflt
);
7600 Qmajflt
= intern_c_string ("majflt");
7601 staticpro (&Qmajflt
);
7602 Qcminflt
= intern_c_string ("cminflt");
7603 staticpro (&Qcminflt
);
7604 Qcmajflt
= intern_c_string ("cmajflt");
7605 staticpro (&Qcmajflt
);
7606 Qutime
= intern_c_string ("utime");
7607 staticpro (&Qutime
);
7608 Qstime
= intern_c_string ("stime");
7609 staticpro (&Qstime
);
7610 Qtime
= intern_c_string ("time");
7612 Qcutime
= intern_c_string ("cutime");
7613 staticpro (&Qcutime
);
7614 Qcstime
= intern_c_string ("cstime");
7615 staticpro (&Qcstime
);
7616 Qctime
= intern_c_string ("ctime");
7617 staticpro (&Qctime
);
7618 Qpri
= intern_c_string ("pri");
7620 Qnice
= intern_c_string ("nice");
7622 Qthcount
= intern_c_string ("thcount");
7623 staticpro (&Qthcount
);
7624 Qstart
= intern_c_string ("start");
7625 staticpro (&Qstart
);
7626 Qvsize
= intern_c_string ("vsize");
7627 staticpro (&Qvsize
);
7628 Qrss
= intern_c_string ("rss");
7630 Qetime
= intern_c_string ("etime");
7631 staticpro (&Qetime
);
7632 Qpcpu
= intern_c_string ("pcpu");
7634 Qpmem
= intern_c_string ("pmem");
7636 Qargs
= intern_c_string ("args");
7639 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
7640 doc
: /* *Non-nil means delete processes immediately when they exit.
7641 A value of nil means don't delete them until `list-processes' is run. */);
7643 delete_exited_processes
= 1;
7645 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
7646 doc
: /* Control type of device used to communicate with subprocesses.
7647 Values are nil to use a pipe, or t or `pty' to use a pty.
7648 The value has no effect if the system has no ptys or if all ptys are busy:
7649 then a pipe is used in any case.
7650 The value takes effect when `start-process' is called. */);
7651 Vprocess_connection_type
= Qt
;
7653 #ifdef ADAPTIVE_READ_BUFFERING
7654 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
7655 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7656 On some systems, when Emacs reads the output from a subprocess, the output data
7657 is read in very small blocks, potentially resulting in very poor performance.
7658 This behavior can be remedied to some extent by setting this variable to a
7659 non-nil value, as it will automatically delay reading from such processes, to
7660 allow them to produce more output before Emacs tries to read it.
7661 If the value is t, the delay is reset after each write to the process; any other
7662 non-nil value means that the delay is not reset on write.
7663 The variable takes effect when `start-process' is called. */);
7664 Vprocess_adaptive_read_buffering
= Qt
;
7667 defsubr (&Sprocessp
);
7668 defsubr (&Sget_process
);
7669 defsubr (&Sget_buffer_process
);
7670 defsubr (&Sdelete_process
);
7671 defsubr (&Sprocess_status
);
7672 defsubr (&Sprocess_exit_status
);
7673 defsubr (&Sprocess_id
);
7674 defsubr (&Sprocess_name
);
7675 defsubr (&Sprocess_tty_name
);
7676 defsubr (&Sprocess_command
);
7677 defsubr (&Sset_process_buffer
);
7678 defsubr (&Sprocess_buffer
);
7679 defsubr (&Sprocess_mark
);
7680 defsubr (&Sset_process_filter
);
7681 defsubr (&Sprocess_filter
);
7682 defsubr (&Sset_process_sentinel
);
7683 defsubr (&Sprocess_sentinel
);
7684 defsubr (&Sset_process_window_size
);
7685 defsubr (&Sset_process_inherit_coding_system_flag
);
7686 defsubr (&Sprocess_inherit_coding_system_flag
);
7687 defsubr (&Sset_process_query_on_exit_flag
);
7688 defsubr (&Sprocess_query_on_exit_flag
);
7689 defsubr (&Sprocess_contact
);
7690 defsubr (&Sprocess_plist
);
7691 defsubr (&Sset_process_plist
);
7692 defsubr (&Slist_processes
);
7693 defsubr (&Sprocess_list
);
7694 defsubr (&Sstart_process
);
7696 defsubr (&Sserial_process_configure
);
7697 defsubr (&Smake_serial_process
);
7698 #endif /* HAVE_SERIAL */
7700 defsubr (&Sset_network_process_option
);
7701 defsubr (&Smake_network_process
);
7702 defsubr (&Sformat_network_address
);
7703 #endif /* HAVE_SOCKETS */
7704 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
7706 defsubr (&Snetwork_interface_list
);
7708 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7709 defsubr (&Snetwork_interface_info
);
7711 #endif /* HAVE_SOCKETS ... */
7712 #ifdef DATAGRAM_SOCKETS
7713 defsubr (&Sprocess_datagram_address
);
7714 defsubr (&Sset_process_datagram_address
);
7716 defsubr (&Saccept_process_output
);
7717 defsubr (&Sprocess_send_region
);
7718 defsubr (&Sprocess_send_string
);
7719 defsubr (&Sinterrupt_process
);
7720 defsubr (&Skill_process
);
7721 defsubr (&Squit_process
);
7722 defsubr (&Sstop_process
);
7723 defsubr (&Scontinue_process
);
7724 defsubr (&Sprocess_running_child_p
);
7725 defsubr (&Sprocess_send_eof
);
7726 defsubr (&Ssignal_process
);
7727 defsubr (&Swaiting_for_user_input_p
);
7728 defsubr (&Sprocess_type
);
7729 defsubr (&Sset_process_coding_system
);
7730 defsubr (&Sprocess_coding_system
);
7731 defsubr (&Sset_process_filter_multibyte
);
7732 defsubr (&Sprocess_filter_multibyte_p
);
7733 defsubr (&Slist_system_processes
);
7734 defsubr (&Sprocess_attributes
);
7738 #else /* not subprocesses */
7740 #include <sys/types.h>
7742 #include <sys/stat.h>
7746 #ifdef HAVE_UNISTD_H
7751 #include "systime.h"
7752 #include "character.h"
7754 #include "termopts.h"
7755 #include "sysselect.h"
7757 extern int frame_garbaged
;
7759 extern EMACS_TIME
timer_check ();
7760 extern int timers_run
;
7762 Lisp_Object QCtype
, QCname
;
7764 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
7765 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
7766 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
7767 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
7769 /* As described above, except assuming that there are no subprocesses:
7771 Wait for timeout to elapse and/or keyboard input to be available.
7774 timeout in seconds, or
7775 zero for no limit, or
7776 -1 means gobble data immediately available but don't wait for any.
7778 read_kbd is a Lisp_Object:
7779 0 to ignore keyboard input, or
7780 1 to return when input is available, or
7781 -1 means caller will actually read the input, so don't throw to
7784 see full version for other parameters. We know that wait_proc will
7785 always be NULL, since `subprocesses' isn't defined.
7787 do_display != 0 means redisplay should be done to show subprocess
7788 output that arrives.
7790 Return true if we received input from any process. */
7793 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
7794 wait_for_cell
, wait_proc
, just_wait_proc
)
7795 int time_limit
, microsecs
, read_kbd
, do_display
;
7796 Lisp_Object wait_for_cell
;
7797 struct Lisp_Process
*wait_proc
;
7801 EMACS_TIME end_time
, timeout
;
7802 SELECT_TYPE waitchannels
;
7805 /* What does time_limit really mean? */
7806 if (time_limit
|| microsecs
)
7808 EMACS_GET_TIME (end_time
);
7809 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
7810 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
7813 /* Turn off periodic alarms (in case they are in use)
7814 and then turn off any other atimers,
7815 because the select emulator uses alarms. */
7817 turn_on_atimers (0);
7821 int timeout_reduced_for_timers
= 0;
7823 /* If calling from keyboard input, do not quit
7824 since we want to return C-g as an input character.
7825 Otherwise, do pending quit if requested. */
7829 /* Exit now if the cell we're waiting for became non-nil. */
7830 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7833 /* Compute time from now till when time limit is up */
7834 /* Exit if already run out */
7835 if (time_limit
== -1)
7837 /* -1 specified for timeout means
7838 gobble output available now
7839 but don't wait at all. */
7841 EMACS_SET_SECS_USECS (timeout
, 0, 0);
7843 else if (time_limit
|| microsecs
)
7845 EMACS_GET_TIME (timeout
);
7846 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
7847 if (EMACS_TIME_NEG_P (timeout
))
7852 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7855 /* If our caller will not immediately handle keyboard events,
7856 run timer events directly.
7857 (Callers that will immediately read keyboard events
7858 call timer_delay on their own.) */
7859 if (NILP (wait_for_cell
))
7861 EMACS_TIME timer_delay
;
7865 int old_timers_run
= timers_run
;
7866 timer_delay
= timer_check (1);
7867 if (timers_run
!= old_timers_run
&& do_display
)
7868 /* We must retry, since a timer may have requeued itself
7869 and that could alter the time delay. */
7870 redisplay_preserve_echo_area (14);
7874 while (!detect_input_pending ());
7876 /* If there is unread keyboard input, also return. */
7878 && requeued_events_pending_p ())
7881 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7883 EMACS_TIME difference
;
7884 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7885 if (EMACS_TIME_NEG_P (difference
))
7887 timeout
= timer_delay
;
7888 timeout_reduced_for_timers
= 1;
7893 /* Cause C-g and alarm signals to take immediate action,
7894 and cause input available signals to zero out timeout. */
7896 set_waiting_for_input (&timeout
);
7898 /* Wait till there is something to do. */
7900 if (! read_kbd
&& NILP (wait_for_cell
))
7901 FD_ZERO (&waitchannels
);
7903 FD_SET (0, &waitchannels
);
7905 /* If a frame has been newly mapped and needs updating,
7906 reprocess its display stuff. */
7907 if (frame_garbaged
&& do_display
)
7909 clear_waiting_for_input ();
7910 redisplay_preserve_echo_area (15);
7912 set_waiting_for_input (&timeout
);
7915 if (read_kbd
&& detect_input_pending ())
7918 FD_ZERO (&waitchannels
);
7921 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7926 /* Make C-g and alarm signals set flags again */
7927 clear_waiting_for_input ();
7929 /* If we woke up due to SIGWINCH, actually change size now. */
7930 do_pending_window_change (0);
7932 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7933 /* We waited the full specified time, so return now. */
7938 /* If the system call was interrupted, then go around the
7940 if (xerrno
== EINTR
)
7941 FD_ZERO (&waitchannels
);
7943 error ("select error: %s", emacs_strerror (xerrno
));
7946 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7947 /* System sometimes fails to deliver SIGIO. */
7948 kill (getpid (), SIGIO
);
7951 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7952 kill (getpid (), SIGIO
);
7955 /* Check for keyboard input */
7958 && detect_input_pending_run_timers (do_display
))
7960 swallow_events (do_display
);
7961 if (detect_input_pending_run_timers (do_display
))
7965 /* If there is unread keyboard input, also return. */
7967 && requeued_events_pending_p ())
7970 /* If wait_for_cell. check for keyboard input
7971 but don't run any timers.
7972 ??? (It seems wrong to me to check for keyboard
7973 input at all when wait_for_cell, but the code
7974 has been this way since July 1994.
7975 Try changing this after version 19.31.) */
7976 if (! NILP (wait_for_cell
)
7977 && detect_input_pending ())
7979 swallow_events (do_display
);
7980 if (detect_input_pending ())
7984 /* Exit now if the cell we're waiting for became non-nil. */
7985 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7995 /* Don't confuse make-docfile by having two doc strings for this function.
7996 make-docfile does not pay attention to #if, for good reason! */
7997 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
8000 register Lisp_Object name
;
8005 /* Don't confuse make-docfile by having two doc strings for this function.
8006 make-docfile does not pay attention to #if, for good reason! */
8007 DEFUN ("process-inherit-coding-system-flag",
8008 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
8012 register Lisp_Object process
;
8014 /* Ignore the argument and return the value of
8015 inherit-process-coding-system. */
8016 return inherit_process_coding_system
? Qt
: Qnil
;
8019 /* Kill all processes associated with `buffer'.
8020 If `buffer' is nil, kill all processes.
8021 Since we have no subprocesses, this does nothing. */
8024 kill_buffer_processes (buffer
)
8029 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
8031 doc
: /* Return a list of numerical process IDs of all running processes.
8032 If this functionality is unsupported, return nil.
8034 See `process-attributes' for getting attributes of a process given its ID. */)
8037 return list_system_processes ();
8040 DEFUN ("process-attributes", Fprocess_attributes
,
8041 Sprocess_attributes
, 1, 1, 0,
8042 doc
: /* Return attributes of the process given by its PID, a number.
8044 Value is an alist where each element is a cons cell of the form
8048 If this functionality is unsupported, the value is nil.
8050 See `list-system-processes' for getting a list of all process IDs.
8052 The KEYs of the attributes that this function may return are listed
8053 below, together with the type of the associated VALUE (in parentheses).
8054 Not all platforms support all of these attributes; unsupported
8055 attributes will not appear in the returned alist.
8056 Unless explicitly indicated otherwise, numbers can have either
8057 integer or floating point values.
8059 euid -- Effective user User ID of the process (number)
8060 user -- User name corresponding to euid (string)
8061 egid -- Effective user Group ID of the process (number)
8062 group -- Group name corresponding to egid (string)
8063 comm -- Command name (executable name only) (string)
8064 state -- Process state code, such as "S", "R", or "T" (string)
8065 ppid -- Parent process ID (number)
8066 pgrp -- Process group ID (number)
8067 sess -- Session ID, i.e. process ID of session leader (number)
8068 ttname -- Controlling tty name (string)
8069 tpgid -- ID of foreground process group on the process's tty (number)
8070 minflt -- number of minor page faults (number)
8071 majflt -- number of major page faults (number)
8072 cminflt -- cumulative number of minor page faults (number)
8073 cmajflt -- cumulative number of major page faults (number)
8074 utime -- user time used by the process, in the (HIGH LOW USEC) format
8075 stime -- system time used by the process, in the (HIGH LOW USEC) format
8076 time -- sum of utime and stime, in the (HIGH LOW USEC) format
8077 cutime -- user time used by the process and its children, (HIGH LOW USEC)
8078 cstime -- system time used by the process and its children, (HIGH LOW USEC)
8079 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
8080 pri -- priority of the process (number)
8081 nice -- nice value of the process (number)
8082 thcount -- process thread count (number)
8083 start -- time the process started, in the (HIGH LOW USEC) format
8084 vsize -- virtual memory size of the process in KB's (number)
8085 rss -- resident set size of the process in KB's (number)
8086 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
8087 pcpu -- percents of CPU time used by the process (floating-point number)
8088 pmem -- percents of total physical memory used by process's resident set
8089 (floating-point number)
8090 args -- command line which invoked the process (string). */)
8095 return system_process_attributes (pid
);
8107 QCtype
= intern_c_string (":type");
8108 staticpro (&QCtype
);
8109 QCname
= intern_c_string (":name");
8110 staticpro (&QCname
);
8111 QCtype
= intern_c_string (":type");
8112 staticpro (&QCtype
);
8113 QCname
= intern_c_string (":name");
8114 staticpro (&QCname
);
8115 Qeuid
= intern_c_string ("euid");
8117 Qegid
= intern_c_string ("egid");
8119 Quser
= intern_c_string ("user");
8121 Qgroup
= intern_c_string ("group");
8122 staticpro (&Qgroup
);
8123 Qcomm
= intern_c_string ("comm");
8125 Qstate
= intern_c_string ("state");
8126 staticpro (&Qstate
);
8127 Qppid
= intern_c_string ("ppid");
8129 Qpgrp
= intern_c_string ("pgrp");
8131 Qsess
= intern_c_string ("sess");
8133 Qttname
= intern_c_string ("ttname");
8134 staticpro (&Qttname
);
8135 Qtpgid
= intern_c_string ("tpgid");
8136 staticpro (&Qtpgid
);
8137 Qminflt
= intern_c_string ("minflt");
8138 staticpro (&Qminflt
);
8139 Qmajflt
= intern_c_string ("majflt");
8140 staticpro (&Qmajflt
);
8141 Qcminflt
= intern_c_string ("cminflt");
8142 staticpro (&Qcminflt
);
8143 Qcmajflt
= intern_c_string ("cmajflt");
8144 staticpro (&Qcmajflt
);
8145 Qutime
= intern_c_string ("utime");
8146 staticpro (&Qutime
);
8147 Qstime
= intern_c_string ("stime");
8148 staticpro (&Qstime
);
8149 Qtime
= intern_c_string ("time");
8151 Qcutime
= intern_c_string ("cutime");
8152 staticpro (&Qcutime
);
8153 Qcstime
= intern_c_string ("cstime");
8154 staticpro (&Qcstime
);
8155 Qctime
= intern_c_string ("ctime");
8156 staticpro (&Qctime
);
8157 Qpri
= intern_c_string ("pri");
8159 Qnice
= intern_c_string ("nice");
8161 Qthcount
= intern_c_string ("thcount");
8162 staticpro (&Qthcount
);
8163 Qstart
= intern_c_string ("start");
8164 staticpro (&Qstart
);
8165 Qvsize
= intern_c_string ("vsize");
8166 staticpro (&Qvsize
);
8167 Qrss
= intern_c_string ("rss");
8169 Qetime
= intern_c_string ("etime");
8170 staticpro (&Qetime
);
8171 Qpcpu
= intern_c_string ("pcpu");
8173 Qpmem
= intern_c_string ("pmem");
8175 Qargs
= intern_c_string ("args");
8178 defsubr (&Sget_buffer_process
);
8179 defsubr (&Sprocess_inherit_coding_system_flag
);
8180 defsubr (&Slist_system_processes
);
8181 defsubr (&Sprocess_attributes
);
8185 #endif /* not subprocesses */
8187 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
8188 (do not change this comment) */