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 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3660 if (ret
== 0 || xerrno
== EISCONN
)
3662 /* The unwind-protect will be discarded afterwards.
3663 Likewise for immediate_quit. */
3667 #ifdef NON_BLOCKING_CONNECT
3669 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3673 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3678 if (xerrno
== EINTR
)
3680 /* Unlike most other syscalls connect() cannot be called
3681 again. (That would return EALREADY.) The proper way to
3682 wait for completion is select(). */
3689 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3696 report_file_error ("select failed", Qnil
);
3700 int len
= sizeof xerrno
;
3701 eassert (FD_ISSET (s
, &fdset
));
3702 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3703 report_file_error ("getsockopt failed", Qnil
);
3705 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3713 /* Discard the unwind protect closing S. */
3714 specpdl_ptr
= specpdl
+ count1
;
3721 #ifdef DATAGRAM_SOCKETS
3722 if (socktype
== SOCK_DGRAM
)
3724 if (datagram_address
[s
].sa
)
3726 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3727 datagram_address
[s
].len
= lres
->ai_addrlen
;
3731 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3732 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3735 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3736 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3737 conv_lisp_to_sockaddr (rfamily
, remote
,
3738 datagram_address
[s
].sa
, rlen
);
3742 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3745 contact
= Fplist_put (contact
, QCaddress
,
3746 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3747 #ifdef HAVE_GETSOCKNAME
3750 struct sockaddr_in sa1
;
3751 int len1
= sizeof (sa1
);
3752 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3753 contact
= Fplist_put (contact
, QClocal
,
3754 conv_sockaddr_to_lisp (&sa1
, len1
));
3761 #ifdef HAVE_GETADDRINFO
3770 /* Discard the unwind protect for closing S, if any. */
3771 specpdl_ptr
= specpdl
+ count1
;
3773 /* Unwind bind_polling_period and request_sigio. */
3774 unbind_to (count
, Qnil
);
3778 /* If non-blocking got this far - and failed - assume non-blocking is
3779 not supported after all. This is probably a wrong assumption, but
3780 the normal blocking calls to open-network-stream handles this error
3782 if (is_non_blocking_client
)
3787 report_file_error ("make server process failed", contact
);
3789 report_file_error ("make client process failed", contact
);
3796 buffer
= Fget_buffer_create (buffer
);
3797 proc
= make_process (name
);
3799 chan_process
[inch
] = proc
;
3802 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3805 fcntl (inch
, F_SETFL
, O_NDELAY
);
3809 p
= XPROCESS (proc
);
3811 p
->childp
= contact
;
3812 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3816 p
->sentinel
= sentinel
;
3818 p
->log
= Fplist_get (contact
, QClog
);
3819 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3820 p
->kill_without_query
= 1;
3821 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3826 if (is_server
&& socktype
!= SOCK_DGRAM
)
3827 p
->status
= Qlisten
;
3829 /* Make the process marker point into the process buffer (if any). */
3830 if (BUFFERP (buffer
))
3831 set_marker_both (p
->mark
, buffer
,
3832 BUF_ZV (XBUFFER (buffer
)),
3833 BUF_ZV_BYTE (XBUFFER (buffer
)));
3835 #ifdef NON_BLOCKING_CONNECT
3836 if (is_non_blocking_client
)
3838 /* We may get here if connect did succeed immediately. However,
3839 in that case, we still need to signal this like a non-blocking
3841 p
->status
= Qconnect
;
3842 if (!FD_ISSET (inch
, &connect_wait_mask
))
3844 FD_SET (inch
, &connect_wait_mask
);
3845 num_pending_connects
++;
3850 /* A server may have a client filter setting of Qt, but it must
3851 still listen for incoming connects unless it is stopped. */
3852 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3853 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3855 FD_SET (inch
, &input_wait_mask
);
3856 FD_SET (inch
, &non_keyboard_wait_mask
);
3859 if (inch
> max_process_desc
)
3860 max_process_desc
= inch
;
3862 tem
= Fplist_member (contact
, QCcoding
);
3863 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3864 tem
= Qnil
; /* No error message (too late!). */
3867 /* Setup coding systems for communicating with the network stream. */
3868 struct gcpro gcpro1
;
3869 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3870 Lisp_Object coding_systems
= Qt
;
3871 Lisp_Object args
[5], val
;
3875 val
= XCAR (XCDR (tem
));
3879 else if (!NILP (Vcoding_system_for_read
))
3880 val
= Vcoding_system_for_read
;
3881 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3882 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3883 /* We dare not decode end-of-line format by setting VAL to
3884 Qraw_text, because the existing Emacs Lisp libraries
3885 assume that they receive bare code including a sequene of
3890 if (NILP (host
) || NILP (service
))
3891 coding_systems
= Qnil
;
3894 args
[0] = Qopen_network_stream
, args
[1] = name
,
3895 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3897 coding_systems
= Ffind_operation_coding_system (5, args
);
3900 if (CONSP (coding_systems
))
3901 val
= XCAR (coding_systems
);
3902 else if (CONSP (Vdefault_process_coding_system
))
3903 val
= XCAR (Vdefault_process_coding_system
);
3907 p
->decode_coding_system
= val
;
3911 val
= XCAR (XCDR (tem
));
3915 else if (!NILP (Vcoding_system_for_write
))
3916 val
= Vcoding_system_for_write
;
3917 else if (NILP (current_buffer
->enable_multibyte_characters
))
3921 if (EQ (coding_systems
, Qt
))
3923 if (NILP (host
) || NILP (service
))
3924 coding_systems
= Qnil
;
3927 args
[0] = Qopen_network_stream
, args
[1] = name
,
3928 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3930 coding_systems
= Ffind_operation_coding_system (5, args
);
3934 if (CONSP (coding_systems
))
3935 val
= XCDR (coding_systems
);
3936 else if (CONSP (Vdefault_process_coding_system
))
3937 val
= XCDR (Vdefault_process_coding_system
);
3941 p
->encode_coding_system
= val
;
3943 setup_process_coding_systems (proc
);
3945 p
->decoding_buf
= make_uninit_string (0);
3946 p
->decoding_carryover
= 0;
3947 p
->encoding_buf
= make_uninit_string (0);
3949 p
->inherit_coding_system_flag
3950 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3955 #endif /* HAVE_SOCKETS */
3958 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3961 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3962 doc
: /* Return an alist of all network interfaces and their network address.
3963 Each element is a cons, the car of which is a string containing the
3964 interface name, and the cdr is the network address in internal
3965 format; see the description of ADDRESS in `make-network-process'. */)
3968 struct ifconf ifconf
;
3969 struct ifreq
*ifreqs
= NULL
;
3974 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3980 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3981 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3988 ifconf
.ifc_len
= buf_size
;
3989 ifconf
.ifc_req
= ifreqs
;
3990 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3996 if (ifconf
.ifc_len
== buf_size
)
4000 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
4003 while (--ifaces
>= 0)
4005 struct ifreq
*ifq
= &ifreqs
[ifaces
];
4006 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
4007 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
4009 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
4010 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
4011 res
= Fcons (Fcons (build_string (namebuf
),
4012 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
4013 sizeof (struct sockaddr
))),
4019 #endif /* SIOCGIFCONF */
4021 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
4025 const char *flag_sym
;
4028 static const struct ifflag_def ifflag_table
[] = {
4032 #ifdef IFF_BROADCAST
4033 { IFF_BROADCAST
, "broadcast" },
4036 { IFF_DEBUG
, "debug" },
4039 { IFF_LOOPBACK
, "loopback" },
4041 #ifdef IFF_POINTOPOINT
4042 { IFF_POINTOPOINT
, "pointopoint" },
4045 { IFF_RUNNING
, "running" },
4048 { IFF_NOARP
, "noarp" },
4051 { IFF_PROMISC
, "promisc" },
4053 #ifdef IFF_NOTRAILERS
4054 { IFF_NOTRAILERS
, "notrailers" },
4057 { IFF_ALLMULTI
, "allmulti" },
4060 { IFF_MASTER
, "master" },
4063 { IFF_SLAVE
, "slave" },
4065 #ifdef IFF_MULTICAST
4066 { IFF_MULTICAST
, "multicast" },
4069 { IFF_PORTSEL
, "portsel" },
4071 #ifdef IFF_AUTOMEDIA
4072 { IFF_AUTOMEDIA
, "automedia" },
4075 { IFF_DYNAMIC
, "dynamic" },
4078 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
4081 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
4084 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
4087 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
4090 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
4095 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
4096 doc
: /* Return information about network interface named IFNAME.
4097 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
4098 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
4099 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
4100 FLAGS is the current flags of the interface. */)
4105 Lisp_Object res
= Qnil
;
4110 CHECK_STRING (ifname
);
4112 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
4113 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
4115 s
= socket (AF_INET
, SOCK_STREAM
, 0);
4120 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
4121 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
4123 int flags
= rq
.ifr_flags
;
4124 const struct ifflag_def
*fp
;
4128 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
4130 if (flags
& fp
->flag_bit
)
4132 elt
= Fcons (intern (fp
->flag_sym
), elt
);
4133 flags
-= fp
->flag_bit
;
4136 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
4138 if (flags
& (1 << fnum
))
4140 elt
= Fcons (make_number (fnum
), elt
);
4145 res
= Fcons (elt
, res
);
4148 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
4149 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
4151 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
4152 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
4156 for (n
= 0; n
< 6; n
++)
4157 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
4158 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
4161 res
= Fcons (elt
, res
);
4164 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
4165 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
4168 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
4169 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
4171 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4175 res
= Fcons (elt
, res
);
4178 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4179 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4182 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4185 res
= Fcons (elt
, res
);
4188 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
4189 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4192 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4195 res
= Fcons (elt
, res
);
4199 return any
? res
: Qnil
;
4202 #endif /* HAVE_SOCKETS */
4204 /* Turn off input and output for process PROC. */
4207 deactivate_process (proc
)
4210 register int inchannel
, outchannel
;
4211 register struct Lisp_Process
*p
= XPROCESS (proc
);
4213 inchannel
= p
->infd
;
4214 outchannel
= p
->outfd
;
4216 #ifdef ADAPTIVE_READ_BUFFERING
4217 if (p
->read_output_delay
> 0)
4219 if (--process_output_delay_count
< 0)
4220 process_output_delay_count
= 0;
4221 p
->read_output_delay
= 0;
4222 p
->read_output_skip
= 0;
4228 /* Beware SIGCHLD hereabouts. */
4229 flush_pending_output (inchannel
);
4230 emacs_close (inchannel
);
4231 if (outchannel
>= 0 && outchannel
!= inchannel
)
4232 emacs_close (outchannel
);
4236 #ifdef DATAGRAM_SOCKETS
4237 if (DATAGRAM_CHAN_P (inchannel
))
4239 xfree (datagram_address
[inchannel
].sa
);
4240 datagram_address
[inchannel
].sa
= 0;
4241 datagram_address
[inchannel
].len
= 0;
4244 chan_process
[inchannel
] = Qnil
;
4245 FD_CLR (inchannel
, &input_wait_mask
);
4246 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4247 #ifdef NON_BLOCKING_CONNECT
4248 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4250 FD_CLR (inchannel
, &connect_wait_mask
);
4251 if (--num_pending_connects
< 0)
4255 if (inchannel
== max_process_desc
)
4258 /* We just closed the highest-numbered process input descriptor,
4259 so recompute the highest-numbered one now. */
4260 max_process_desc
= 0;
4261 for (i
= 0; i
< MAXDESC
; i
++)
4262 if (!NILP (chan_process
[i
]))
4263 max_process_desc
= i
;
4268 /* Close all descriptors currently in use for communication
4269 with subprocess. This is used in a newly-forked subprocess
4270 to get rid of irrelevant descriptors. */
4273 close_process_descs ()
4277 for (i
= 0; i
< MAXDESC
; i
++)
4279 Lisp_Object process
;
4280 process
= chan_process
[i
];
4281 if (!NILP (process
))
4283 int in
= XPROCESS (process
)->infd
;
4284 int out
= XPROCESS (process
)->outfd
;
4287 if (out
>= 0 && in
!= out
)
4294 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4296 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4297 It is read into the process' buffers or given to their filter functions.
4298 Non-nil arg PROCESS means do not return until some output has been received
4301 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4302 and milliseconds to wait; return after that much time whether or not
4303 there is any subprocess output. If SECONDS is a floating point number,
4304 it specifies a fractional number of seconds to wait.
4305 The MILLISEC argument is obsolete and should be avoided.
4307 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4308 from PROCESS, suspending reading output from other processes.
4309 If JUST-THIS-ONE is an integer, don't run any timers either.
4310 Return non-nil if we received any output before the timeout expired. */)
4311 (process
, seconds
, millisec
, just_this_one
)
4312 register Lisp_Object process
, seconds
, millisec
, just_this_one
;
4314 int secs
, usecs
= 0;
4316 if (! NILP (process
))
4317 CHECK_PROCESS (process
);
4319 just_this_one
= Qnil
;
4321 if (!NILP (millisec
))
4322 { /* Obsolete calling convention using integers rather than floats. */
4323 CHECK_NUMBER (millisec
);
4325 seconds
= make_float (XINT (millisec
) / 1000.0);
4328 CHECK_NUMBER (seconds
);
4329 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4333 if (!NILP (seconds
))
4335 if (INTEGERP (seconds
))
4336 secs
= XINT (seconds
);
4337 else if (FLOATP (seconds
))
4339 double timeout
= XFLOAT_DATA (seconds
);
4340 secs
= (int) timeout
;
4341 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
4344 wrong_type_argument (Qnumberp
, seconds
);
4346 if (secs
< 0 || (secs
== 0 && usecs
== 0))
4347 secs
= -1, usecs
= 0;
4350 secs
= NILP (process
) ? -1 : 0;
4353 (wait_reading_process_output (secs
, usecs
, 0, 0,
4355 !NILP (process
) ? XPROCESS (process
) : NULL
,
4356 NILP (just_this_one
) ? 0 :
4357 !INTEGERP (just_this_one
) ? 1 : -1)
4361 /* Accept a connection for server process SERVER on CHANNEL. */
4363 static int connect_counter
= 0;
4366 server_accept_connection (server
, channel
)
4370 Lisp_Object proc
, caller
, name
, buffer
;
4371 Lisp_Object contact
, host
, service
;
4372 struct Lisp_Process
*ps
= XPROCESS (server
);
4373 struct Lisp_Process
*p
;
4377 struct sockaddr_in in
;
4379 struct sockaddr_in6 in6
;
4381 #ifdef HAVE_LOCAL_SOCKETS
4382 struct sockaddr_un un
;
4385 int len
= sizeof saddr
;
4387 s
= accept (channel
, &saddr
.sa
, &len
);
4396 if (code
== EWOULDBLOCK
)
4400 if (!NILP (ps
->log
))
4401 call3 (ps
->log
, server
, Qnil
,
4402 concat3 (build_string ("accept failed with code"),
4403 Fnumber_to_string (make_number (code
)),
4404 build_string ("\n")));
4410 /* Setup a new process to handle the connection. */
4412 /* Generate a unique identification of the caller, and build contact
4413 information for this process. */
4416 switch (saddr
.sa
.sa_family
)
4420 Lisp_Object args
[5];
4421 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4422 args
[0] = build_string ("%d.%d.%d.%d");
4423 args
[1] = make_number (*ip
++);
4424 args
[2] = make_number (*ip
++);
4425 args
[3] = make_number (*ip
++);
4426 args
[4] = make_number (*ip
++);
4427 host
= Fformat (5, args
);
4428 service
= make_number (ntohs (saddr
.in
.sin_port
));
4430 args
[0] = build_string (" <%s:%d>");
4433 caller
= Fformat (3, args
);
4440 Lisp_Object args
[9];
4441 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4443 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4444 for (i
= 0; i
< 8; i
++)
4445 args
[i
+1] = make_number (ntohs(ip6
[i
]));
4446 host
= Fformat (9, args
);
4447 service
= make_number (ntohs (saddr
.in
.sin_port
));
4449 args
[0] = build_string (" <[%s]:%d>");
4452 caller
= Fformat (3, args
);
4457 #ifdef HAVE_LOCAL_SOCKETS
4461 caller
= Fnumber_to_string (make_number (connect_counter
));
4462 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4466 /* Create a new buffer name for this process if it doesn't have a
4467 filter. The new buffer name is based on the buffer name or
4468 process name of the server process concatenated with the caller
4471 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4475 buffer
= ps
->buffer
;
4477 buffer
= Fbuffer_name (buffer
);
4482 buffer
= concat2 (buffer
, caller
);
4483 buffer
= Fget_buffer_create (buffer
);
4487 /* Generate a unique name for the new server process. Combine the
4488 server process name with the caller identification. */
4490 name
= concat2 (ps
->name
, caller
);
4491 proc
= make_process (name
);
4493 chan_process
[s
] = proc
;
4496 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4499 fcntl (s
, F_SETFL
, O_NDELAY
);
4503 p
= XPROCESS (proc
);
4505 /* Build new contact information for this setup. */
4506 contact
= Fcopy_sequence (ps
->childp
);
4507 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4508 contact
= Fplist_put (contact
, QChost
, host
);
4509 if (!NILP (service
))
4510 contact
= Fplist_put (contact
, QCservice
, service
);
4511 contact
= Fplist_put (contact
, QCremote
,
4512 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4513 #ifdef HAVE_GETSOCKNAME
4515 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4516 contact
= Fplist_put (contact
, QClocal
,
4517 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4520 p
->childp
= contact
;
4521 p
->plist
= Fcopy_sequence (ps
->plist
);
4525 p
->sentinel
= ps
->sentinel
;
4526 p
->filter
= ps
->filter
;
4533 /* Client processes for accepted connections are not stopped initially. */
4534 if (!EQ (p
->filter
, Qt
))
4536 FD_SET (s
, &input_wait_mask
);
4537 FD_SET (s
, &non_keyboard_wait_mask
);
4540 if (s
> max_process_desc
)
4541 max_process_desc
= s
;
4543 /* Setup coding system for new process based on server process.
4544 This seems to be the proper thing to do, as the coding system
4545 of the new process should reflect the settings at the time the
4546 server socket was opened; not the current settings. */
4548 p
->decode_coding_system
= ps
->decode_coding_system
;
4549 p
->encode_coding_system
= ps
->encode_coding_system
;
4550 setup_process_coding_systems (proc
);
4552 p
->decoding_buf
= make_uninit_string (0);
4553 p
->decoding_carryover
= 0;
4554 p
->encoding_buf
= make_uninit_string (0);
4556 p
->inherit_coding_system_flag
4557 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4559 if (!NILP (ps
->log
))
4560 call3 (ps
->log
, server
, proc
,
4561 concat3 (build_string ("accept from "),
4562 (STRINGP (host
) ? host
: build_string ("-")),
4563 build_string ("\n")));
4565 if (!NILP (p
->sentinel
))
4566 exec_sentinel (proc
,
4567 concat3 (build_string ("open from "),
4568 (STRINGP (host
) ? host
: build_string ("-")),
4569 build_string ("\n")));
4572 /* This variable is different from waiting_for_input in keyboard.c.
4573 It is used to communicate to a lisp process-filter/sentinel (via the
4574 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4575 for user-input when that process-filter was called.
4576 waiting_for_input cannot be used as that is by definition 0 when
4577 lisp code is being evalled.
4578 This is also used in record_asynch_buffer_change.
4579 For that purpose, this must be 0
4580 when not inside wait_reading_process_output. */
4581 static int waiting_for_user_input_p
;
4584 wait_reading_process_output_unwind (data
)
4587 waiting_for_user_input_p
= XINT (data
);
4591 /* This is here so breakpoints can be put on it. */
4593 wait_reading_process_output_1 ()
4597 /* Use a wrapper around select to work around a bug in gdb 5.3.
4598 Normally, the wrapper is optimized away by inlining.
4600 If emacs is stopped inside select, the gdb backtrace doesn't
4601 show the function which called select, so it is practically
4602 impossible to step through wait_reading_process_output. */
4606 select_wrapper (n
, rfd
, wfd
, xfd
, tmo
)
4608 SELECT_TYPE
*rfd
, *wfd
, *xfd
;
4611 return select (n
, rfd
, wfd
, xfd
, tmo
);
4613 #define select select_wrapper
4616 /* Read and dispose of subprocess output while waiting for timeout to
4617 elapse and/or keyboard input to be available.
4620 timeout in seconds, or
4621 zero for no limit, or
4622 -1 means gobble data immediately available but don't wait for any.
4625 an additional duration to wait, measured in microseconds.
4626 If this is nonzero and time_limit is 0, then the timeout
4627 consists of MICROSECS only.
4629 READ_KBD is a lisp value:
4630 0 to ignore keyboard input, or
4631 1 to return when input is available, or
4632 -1 meaning caller will actually read the input, so don't throw to
4633 the quit handler, or
4635 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4636 output that arrives.
4638 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4639 (and gobble terminal input into the buffer if any arrives).
4641 If WAIT_PROC is specified, wait until something arrives from that
4642 process. The return value is true if we read some input from
4645 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4646 (suspending output from other processes). A negative value
4647 means don't run any timers either.
4649 If WAIT_PROC is specified, then the function returns true if we
4650 received input from that process before the timeout elapsed.
4651 Otherwise, return true if we received input from any process. */
4654 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4655 wait_for_cell
, wait_proc
, just_wait_proc
)
4656 int time_limit
, microsecs
, read_kbd
, do_display
;
4657 Lisp_Object wait_for_cell
;
4658 struct Lisp_Process
*wait_proc
;
4661 register int channel
, nfds
;
4662 SELECT_TYPE Available
;
4663 #ifdef NON_BLOCKING_CONNECT
4664 SELECT_TYPE Connecting
;
4667 int check_delay
, no_avail
;
4670 EMACS_TIME timeout
, end_time
;
4671 int wait_channel
= -1;
4672 int got_some_input
= 0;
4673 int count
= SPECPDL_INDEX ();
4675 FD_ZERO (&Available
);
4676 #ifdef NON_BLOCKING_CONNECT
4677 FD_ZERO (&Connecting
);
4680 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4681 if (wait_proc
!= NULL
)
4682 wait_channel
= wait_proc
->infd
;
4684 record_unwind_protect (wait_reading_process_output_unwind
,
4685 make_number (waiting_for_user_input_p
));
4686 waiting_for_user_input_p
= read_kbd
;
4688 /* Since we may need to wait several times,
4689 compute the absolute time to return at. */
4690 if (time_limit
|| microsecs
)
4692 EMACS_GET_TIME (end_time
);
4693 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4694 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4699 int timeout_reduced_for_timers
= 0;
4701 /* If calling from keyboard input, do not quit
4702 since we want to return C-g as an input character.
4703 Otherwise, do pending quit if requested. */
4708 process_pending_signals ();
4711 /* Exit now if the cell we're waiting for became non-nil. */
4712 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4715 /* Compute time from now till when time limit is up */
4716 /* Exit if already run out */
4717 if (time_limit
== -1)
4719 /* -1 specified for timeout means
4720 gobble output available now
4721 but don't wait at all. */
4723 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4725 else if (time_limit
|| microsecs
)
4727 EMACS_GET_TIME (timeout
);
4728 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4729 if (EMACS_TIME_NEG_P (timeout
))
4734 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4737 /* Normally we run timers here.
4738 But not if wait_for_cell; in those cases,
4739 the wait is supposed to be short,
4740 and those callers cannot handle running arbitrary Lisp code here. */
4741 if (NILP (wait_for_cell
)
4742 && just_wait_proc
>= 0)
4744 EMACS_TIME timer_delay
;
4748 int old_timers_run
= timers_run
;
4749 struct buffer
*old_buffer
= current_buffer
;
4750 Lisp_Object old_window
= selected_window
;
4752 timer_delay
= timer_check (1);
4754 /* If a timer has run, this might have changed buffers
4755 an alike. Make read_key_sequence aware of that. */
4756 if (timers_run
!= old_timers_run
4757 && (old_buffer
!= current_buffer
4758 || !EQ (old_window
, selected_window
))
4759 && waiting_for_user_input_p
== -1)
4760 record_asynch_buffer_change ();
4762 if (timers_run
!= old_timers_run
&& do_display
)
4763 /* We must retry, since a timer may have requeued itself
4764 and that could alter the time_delay. */
4765 redisplay_preserve_echo_area (9);
4769 while (!detect_input_pending ());
4771 /* If there is unread keyboard input, also return. */
4773 && requeued_events_pending_p ())
4776 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4778 EMACS_TIME difference
;
4779 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4780 if (EMACS_TIME_NEG_P (difference
))
4782 timeout
= timer_delay
;
4783 timeout_reduced_for_timers
= 1;
4786 /* If time_limit is -1, we are not going to wait at all. */
4787 else if (time_limit
!= -1)
4789 /* This is so a breakpoint can be put here. */
4790 wait_reading_process_output_1 ();
4794 /* Cause C-g and alarm signals to take immediate action,
4795 and cause input available signals to zero out timeout.
4797 It is important that we do this before checking for process
4798 activity. If we get a SIGCHLD after the explicit checks for
4799 process activity, timeout is the only way we will know. */
4801 set_waiting_for_input (&timeout
);
4803 /* If status of something has changed, and no input is
4804 available, notify the user of the change right away. After
4805 this explicit check, we'll let the SIGCHLD handler zap
4806 timeout to get our attention. */
4807 if (update_tick
!= process_tick
)
4810 #ifdef NON_BLOCKING_CONNECT
4814 if (kbd_on_hold_p ())
4817 Atemp
= input_wait_mask
;
4819 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4821 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4822 if ((select (max (max (max_process_desc
, max_keyboard_desc
),
4825 #ifdef NON_BLOCKING_CONNECT
4826 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4830 (SELECT_TYPE
*)0, &timeout
)
4833 /* It's okay for us to do this and then continue with
4834 the loop, since timeout has already been zeroed out. */
4835 clear_waiting_for_input ();
4836 status_notify (NULL
);
4837 if (do_display
) redisplay_preserve_echo_area (13);
4841 /* Don't wait for output from a non-running process. Just
4842 read whatever data has already been received. */
4843 if (wait_proc
&& wait_proc
->raw_status_new
)
4844 update_status (wait_proc
);
4846 && ! EQ (wait_proc
->status
, Qrun
)
4847 && ! EQ (wait_proc
->status
, Qconnect
))
4849 int nread
, total_nread
= 0;
4851 clear_waiting_for_input ();
4852 XSETPROCESS (proc
, wait_proc
);
4854 /* Read data from the process, until we exhaust it. */
4855 while (wait_proc
->infd
>= 0)
4857 nread
= read_process_output (proc
, wait_proc
->infd
);
4864 total_nread
+= nread
;
4868 else if (nread
== -1 && EIO
== errno
)
4872 else if (nread
== -1 && EAGAIN
== errno
)
4876 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4880 if (total_nread
> 0 && do_display
)
4881 redisplay_preserve_echo_area (10);
4886 /* Wait till there is something to do */
4888 if (wait_proc
&& just_wait_proc
)
4890 if (wait_proc
->infd
< 0) /* Terminated */
4892 FD_SET (wait_proc
->infd
, &Available
);
4894 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4896 else if (!NILP (wait_for_cell
))
4898 Available
= non_process_wait_mask
;
4900 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4905 Available
= non_keyboard_wait_mask
;
4907 Available
= input_wait_mask
;
4908 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4909 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4912 /* If frame size has changed or the window is newly mapped,
4913 redisplay now, before we start to wait. There is a race
4914 condition here; if a SIGIO arrives between now and the select
4915 and indicates that a frame is trashed, the select may block
4916 displaying a trashed screen. */
4917 if (frame_garbaged
&& do_display
)
4919 clear_waiting_for_input ();
4920 redisplay_preserve_echo_area (11);
4922 set_waiting_for_input (&timeout
);
4926 if (read_kbd
&& detect_input_pending ())
4933 #ifdef NON_BLOCKING_CONNECT
4935 Connecting
= connect_wait_mask
;
4938 #ifdef ADAPTIVE_READ_BUFFERING
4939 /* Set the timeout for adaptive read buffering if any
4940 process has non-zero read_output_skip and non-zero
4941 read_output_delay, and we are not reading output for a
4942 specific wait_channel. It is not executed if
4943 Vprocess_adaptive_read_buffering is nil. */
4944 if (process_output_skip
&& check_delay
> 0)
4946 int usecs
= EMACS_USECS (timeout
);
4947 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4948 usecs
= READ_OUTPUT_DELAY_MAX
;
4949 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4951 proc
= chan_process
[channel
];
4954 /* Find minimum non-zero read_output_delay among the
4955 processes with non-zero read_output_skip. */
4956 if (XPROCESS (proc
)->read_output_delay
> 0)
4959 if (!XPROCESS (proc
)->read_output_skip
)
4961 FD_CLR (channel
, &Available
);
4962 XPROCESS (proc
)->read_output_skip
= 0;
4963 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4964 usecs
= XPROCESS (proc
)->read_output_delay
;
4967 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4968 process_output_skip
= 0;
4971 #if defined (USE_GTK) || defined (HAVE_GCONF)
4973 #elif defined (HAVE_NS)
4978 (max (max (max_process_desc
, max_keyboard_desc
),
4981 #ifdef NON_BLOCKING_CONNECT
4982 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4986 (SELECT_TYPE
*)0, &timeout
);
4991 /* Make C-g and alarm signals set flags again */
4992 clear_waiting_for_input ();
4994 /* If we woke up due to SIGWINCH, actually change size now. */
4995 do_pending_window_change (0);
4997 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4998 /* We wanted the full specified time, so return now. */
5002 if (xerrno
== EINTR
)
5004 else if (xerrno
== EBADF
)
5007 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
5008 the child's closure of the pts gives the parent a SIGHUP, and
5009 the ptc file descriptor is automatically closed,
5010 yielding EBADF here or at select() call above.
5011 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
5012 in m/ibmrt-aix.h), and here we just ignore the select error.
5013 Cleanup occurs c/o status_notify after SIGCLD. */
5014 no_avail
= 1; /* Cannot depend on values returned */
5020 error ("select error: %s", emacs_strerror (xerrno
));
5025 FD_ZERO (&Available
);
5026 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
5029 #if 0 /* When polling is used, interrupt_input is 0,
5030 so get_input_pending should read the input.
5031 So this should not be needed. */
5032 /* If we are using polling for input,
5033 and we see input available, make it get read now.
5034 Otherwise it might not actually get read for a second.
5035 And on hpux, since we turn off polling in wait_reading_process_output,
5036 it might never get read at all if we don't spend much time
5037 outside of wait_reading_process_output. */
5038 if (read_kbd
&& interrupt_input
5039 && keyboard_bit_set (&Available
)
5040 && input_polling_used ())
5041 kill (getpid (), SIGALRM
);
5044 /* Check for keyboard input */
5045 /* If there is any, return immediately
5046 to give it higher priority than subprocesses */
5050 int old_timers_run
= timers_run
;
5051 struct buffer
*old_buffer
= current_buffer
;
5052 Lisp_Object old_window
= selected_window
;
5055 if (detect_input_pending_run_timers (do_display
))
5057 swallow_events (do_display
);
5058 if (detect_input_pending_run_timers (do_display
))
5062 /* If a timer has run, this might have changed buffers
5063 an alike. Make read_key_sequence aware of that. */
5064 if (timers_run
!= old_timers_run
5065 && waiting_for_user_input_p
== -1
5066 && (old_buffer
!= current_buffer
5067 || !EQ (old_window
, selected_window
)))
5068 record_asynch_buffer_change ();
5074 /* If there is unread keyboard input, also return. */
5076 && requeued_events_pending_p ())
5079 /* If we are not checking for keyboard input now,
5080 do process events (but don't run any timers).
5081 This is so that X events will be processed.
5082 Otherwise they may have to wait until polling takes place.
5083 That would causes delays in pasting selections, for example.
5085 (We used to do this only if wait_for_cell.) */
5086 if (read_kbd
== 0 && detect_input_pending ())
5088 swallow_events (do_display
);
5089 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
5090 if (detect_input_pending ())
5095 /* Exit now if the cell we're waiting for became non-nil. */
5096 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
5100 /* If we think we have keyboard input waiting, but didn't get SIGIO,
5101 go read it. This can happen with X on BSD after logging out.
5102 In that case, there really is no input and no SIGIO,
5103 but select says there is input. */
5105 if (read_kbd
&& interrupt_input
5106 && keyboard_bit_set (&Available
) && ! noninteractive
)
5107 kill (getpid (), SIGIO
);
5111 got_some_input
|= nfds
> 0;
5113 /* If checking input just got us a size-change event from X,
5114 obey it now if we should. */
5115 if (read_kbd
|| ! NILP (wait_for_cell
))
5116 do_pending_window_change (0);
5118 /* Check for data from a process. */
5119 if (no_avail
|| nfds
== 0)
5122 /* Really FIRST_PROC_DESC should be 0 on Unix,
5123 but this is safer in the short run. */
5124 for (channel
= 0; channel
<= max_process_desc
; channel
++)
5126 if (FD_ISSET (channel
, &Available
)
5127 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
5131 /* If waiting for this channel, arrange to return as
5132 soon as no more input to be processed. No more
5134 if (wait_channel
== channel
)
5140 proc
= chan_process
[channel
];
5144 /* If this is a server stream socket, accept connection. */
5145 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
5147 server_accept_connection (proc
, channel
);
5151 /* Read data from the process, starting with our
5152 buffered-ahead character if we have one. */
5154 nread
= read_process_output (proc
, channel
);
5157 /* Since read_process_output can run a filter,
5158 which can call accept-process-output,
5159 don't try to read from any other processes
5160 before doing the select again. */
5161 FD_ZERO (&Available
);
5164 redisplay_preserve_echo_area (12);
5167 else if (nread
== -1 && errno
== EWOULDBLOCK
)
5170 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
5171 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
5173 else if (nread
== -1 && errno
== EAGAIN
)
5177 else if (nread
== -1 && errno
== EAGAIN
)
5179 /* Note that we cannot distinguish between no input
5180 available now and a closed pipe.
5181 With luck, a closed pipe will be accompanied by
5182 subprocess termination and SIGCHLD. */
5183 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5185 #endif /* O_NDELAY */
5186 #endif /* O_NONBLOCK */
5188 /* On some OSs with ptys, when the process on one end of
5189 a pty exits, the other end gets an error reading with
5190 errno = EIO instead of getting an EOF (0 bytes read).
5191 Therefore, if we get an error reading and errno =
5192 EIO, just continue, because the child process has
5193 exited and should clean itself up soon (e.g. when we
5196 However, it has been known to happen that the SIGCHLD
5197 got lost. So raise the signal again just in case.
5199 else if (nread
== -1 && errno
== EIO
)
5201 /* Clear the descriptor now, so we only raise the
5202 signal once. Don't do this if `process' is only
5204 if (XPROCESS (proc
)->pid
!= -2)
5206 FD_CLR (channel
, &input_wait_mask
);
5207 FD_CLR (channel
, &non_keyboard_wait_mask
);
5209 kill (getpid (), SIGCHLD
);
5212 #endif /* HAVE_PTYS */
5213 /* If we can detect process termination, don't consider the process
5214 gone just because its pipe is closed. */
5216 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5221 /* Preserve status of processes already terminated. */
5222 XPROCESS (proc
)->tick
= ++process_tick
;
5223 deactivate_process (proc
);
5224 if (XPROCESS (proc
)->raw_status_new
)
5225 update_status (XPROCESS (proc
));
5226 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5227 XPROCESS (proc
)->status
5228 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5231 #ifdef NON_BLOCKING_CONNECT
5232 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
5233 && FD_ISSET (channel
, &connect_wait_mask
))
5235 struct Lisp_Process
*p
;
5237 FD_CLR (channel
, &connect_wait_mask
);
5238 if (--num_pending_connects
< 0)
5241 proc
= chan_process
[channel
];
5245 p
= XPROCESS (proc
);
5248 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5249 So only use it on systems where it is known to work. */
5251 int xlen
= sizeof(xerrno
);
5252 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5257 struct sockaddr pname
;
5258 int pnamelen
= sizeof(pname
);
5260 /* If connection failed, getpeername will fail. */
5262 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
5264 /* Obtain connect failure code through error slippage. */
5267 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
5274 p
->tick
= ++process_tick
;
5275 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
5276 deactivate_process (proc
);
5281 /* Execute the sentinel here. If we had relied on
5282 status_notify to do it later, it will read input
5283 from the process before calling the sentinel. */
5284 exec_sentinel (proc
, build_string ("open\n"));
5285 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5287 FD_SET (p
->infd
, &input_wait_mask
);
5288 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5292 #endif /* NON_BLOCKING_CONNECT */
5293 } /* end for each file descriptor */
5294 } /* end while exit conditions not met */
5296 unbind_to (count
, Qnil
);
5298 /* If calling from keyboard input, do not quit
5299 since we want to return C-g as an input character.
5300 Otherwise, do pending quit if requested. */
5303 /* Prevent input_pending from remaining set if we quit. */
5304 clear_input_pending ();
5308 return got_some_input
;
5311 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5314 read_process_output_call (fun_and_args
)
5315 Lisp_Object fun_and_args
;
5317 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5321 read_process_output_error_handler (error
)
5324 cmd_error_internal (error
, "error in process filter: ");
5326 update_echo_area ();
5327 Fsleep_for (make_number (2), Qnil
);
5331 /* Read pending output from the process channel,
5332 starting with our buffered-ahead character if we have one.
5333 Yield number of decoded characters read.
5335 This function reads at most 4096 characters.
5336 If you want to read all available subprocess output,
5337 you must call it repeatedly until it returns zero.
5339 The characters read are decoded according to PROC's coding-system
5343 read_process_output (proc
, channel
)
5345 register int channel
;
5347 register int nbytes
;
5349 register Lisp_Object outstream
;
5350 register struct Lisp_Process
*p
= XPROCESS (proc
);
5351 register int opoint
;
5352 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5353 int carryover
= p
->decoding_carryover
;
5356 chars
= (char *) alloca (carryover
+ readmax
);
5358 /* See the comment above. */
5359 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
5361 #ifdef DATAGRAM_SOCKETS
5362 /* We have a working select, so proc_buffered_char is always -1. */
5363 if (DATAGRAM_CHAN_P (channel
))
5365 int len
= datagram_address
[channel
].len
;
5366 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5367 0, datagram_address
[channel
].sa
, &len
);
5371 if (proc_buffered_char
[channel
] < 0)
5373 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5374 #ifdef ADAPTIVE_READ_BUFFERING
5375 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5377 int delay
= p
->read_output_delay
;
5380 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5383 process_output_delay_count
++;
5384 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5387 else if (delay
> 0 && (nbytes
== readmax
))
5389 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5391 process_output_delay_count
--;
5393 p
->read_output_delay
= delay
;
5396 p
->read_output_skip
= 1;
5397 process_output_skip
= 1;
5404 chars
[carryover
] = proc_buffered_char
[channel
];
5405 proc_buffered_char
[channel
] = -1;
5406 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5410 nbytes
= nbytes
+ 1;
5413 p
->decoding_carryover
= 0;
5415 /* At this point, NBYTES holds number of bytes just received
5416 (including the one in proc_buffered_char[channel]). */
5419 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5421 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5424 /* Now set NBYTES how many bytes we must decode. */
5425 nbytes
+= carryover
;
5427 /* Read and dispose of the process output. */
5428 outstream
= p
->filter
;
5429 if (!NILP (outstream
))
5431 /* We inhibit quit here instead of just catching it so that
5432 hitting ^G when a filter happens to be running won't screw
5434 int count
= SPECPDL_INDEX ();
5435 Lisp_Object odeactivate
;
5436 Lisp_Object obuffer
, okeymap
;
5438 int outer_running_asynch_code
= running_asynch_code
;
5439 int waiting
= waiting_for_user_input_p
;
5441 /* No need to gcpro these, because all we do with them later
5442 is test them for EQness, and none of them should be a string. */
5443 odeactivate
= Vdeactivate_mark
;
5444 XSETBUFFER (obuffer
, current_buffer
);
5445 okeymap
= current_buffer
->keymap
;
5447 specbind (Qinhibit_quit
, Qt
);
5448 specbind (Qlast_nonmenu_event
, Qt
);
5450 /* In case we get recursively called,
5451 and we already saved the match data nonrecursively,
5452 save the same match data in safely recursive fashion. */
5453 if (outer_running_asynch_code
)
5456 /* Don't clobber the CURRENT match data, either! */
5457 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5458 restore_search_regs ();
5459 record_unwind_save_match_data ();
5460 Fset_match_data (tem
, Qt
);
5463 /* For speed, if a search happens within this code,
5464 save the match data in a special nonrecursive fashion. */
5465 running_asynch_code
= 1;
5467 decode_coding_c_string (coding
, chars
, nbytes
, Qt
);
5468 text
= coding
->dst_object
;
5469 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5470 /* A new coding system might be found. */
5471 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5473 p
->decode_coding_system
= Vlast_coding_system_used
;
5475 /* Don't call setup_coding_system for
5476 proc_decode_coding_system[channel] here. It is done in
5477 detect_coding called via decode_coding above. */
5479 /* If a coding system for encoding is not yet decided, we set
5480 it as the same as coding-system for decoding.
5482 But, before doing that we must check if
5483 proc_encode_coding_system[p->outfd] surely points to a
5484 valid memory because p->outfd will be changed once EOF is
5485 sent to the process. */
5486 if (NILP (p
->encode_coding_system
)
5487 && proc_encode_coding_system
[p
->outfd
])
5489 p
->encode_coding_system
5490 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5491 setup_coding_system (p
->encode_coding_system
,
5492 proc_encode_coding_system
[p
->outfd
]);
5496 if (coding
->carryover_bytes
> 0)
5498 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5499 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5500 bcopy (coding
->carryover
, SDATA (p
->decoding_buf
),
5501 coding
->carryover_bytes
);
5502 p
->decoding_carryover
= coding
->carryover_bytes
;
5504 if (SBYTES (text
) > 0)
5505 internal_condition_case_1 (read_process_output_call
,
5507 Fcons (proc
, Fcons (text
, Qnil
))),
5508 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5509 read_process_output_error_handler
);
5511 /* If we saved the match data nonrecursively, restore it now. */
5512 restore_search_regs ();
5513 running_asynch_code
= outer_running_asynch_code
;
5515 /* Handling the process output should not deactivate the mark. */
5516 Vdeactivate_mark
= odeactivate
;
5518 /* Restore waiting_for_user_input_p as it was
5519 when we were called, in case the filter clobbered it. */
5520 waiting_for_user_input_p
= waiting
;
5522 #if 0 /* Call record_asynch_buffer_change unconditionally,
5523 because we might have changed minor modes or other things
5524 that affect key bindings. */
5525 if (! EQ (Fcurrent_buffer (), obuffer
)
5526 || ! EQ (current_buffer
->keymap
, okeymap
))
5528 /* But do it only if the caller is actually going to read events.
5529 Otherwise there's no need to make him wake up, and it could
5530 cause trouble (for example it would make sit_for return). */
5531 if (waiting_for_user_input_p
== -1)
5532 record_asynch_buffer_change ();
5534 unbind_to (count
, Qnil
);
5538 /* If no filter, write into buffer if it isn't dead. */
5539 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
5541 Lisp_Object old_read_only
;
5542 int old_begv
, old_zv
;
5543 int old_begv_byte
, old_zv_byte
;
5544 Lisp_Object odeactivate
;
5545 int before
, before_byte
;
5549 int count
= SPECPDL_INDEX ();
5551 odeactivate
= Vdeactivate_mark
;
5553 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5554 Fset_buffer (p
->buffer
);
5556 opoint_byte
= PT_BYTE
;
5557 old_read_only
= current_buffer
->read_only
;
5560 old_begv_byte
= BEGV_BYTE
;
5561 old_zv_byte
= ZV_BYTE
;
5563 current_buffer
->read_only
= Qnil
;
5565 /* Insert new output into buffer
5566 at the current end-of-output marker,
5567 thus preserving logical ordering of input and output. */
5568 if (XMARKER (p
->mark
)->buffer
)
5569 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5570 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5573 SET_PT_BOTH (ZV
, ZV_BYTE
);
5575 before_byte
= PT_BYTE
;
5577 /* If the output marker is outside of the visible region, save
5578 the restriction and widen. */
5579 if (! (BEGV
<= PT
&& PT
<= ZV
))
5582 decode_coding_c_string (coding
, chars
, nbytes
, Qt
);
5583 text
= coding
->dst_object
;
5584 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5585 /* A new coding system might be found. See the comment in the
5586 similar code in the previous `if' block. */
5587 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5589 p
->decode_coding_system
= Vlast_coding_system_used
;
5590 if (NILP (p
->encode_coding_system
)
5591 && proc_encode_coding_system
[p
->outfd
])
5593 p
->encode_coding_system
5594 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5595 setup_coding_system (p
->encode_coding_system
,
5596 proc_encode_coding_system
[p
->outfd
]);
5599 if (coding
->carryover_bytes
> 0)
5601 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5602 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5603 bcopy (coding
->carryover
, SDATA (p
->decoding_buf
),
5604 coding
->carryover_bytes
);
5605 p
->decoding_carryover
= coding
->carryover_bytes
;
5607 /* Adjust the multibyteness of TEXT to that of the buffer. */
5608 if (NILP (current_buffer
->enable_multibyte_characters
)
5609 != ! STRING_MULTIBYTE (text
))
5610 text
= (STRING_MULTIBYTE (text
)
5611 ? Fstring_as_unibyte (text
)
5612 : Fstring_to_multibyte (text
));
5613 /* Insert before markers in case we are inserting where
5614 the buffer's mark is, and the user's next command is Meta-y. */
5615 insert_from_string_before_markers (text
, 0, 0,
5616 SCHARS (text
), SBYTES (text
), 0);
5618 /* Make sure the process marker's position is valid when the
5619 process buffer is changed in the signal_after_change above.
5620 W3 is known to do that. */
5621 if (BUFFERP (p
->buffer
)
5622 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5623 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5625 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5627 update_mode_lines
++;
5629 /* Make sure opoint and the old restrictions
5630 float ahead of any new text just as point would. */
5631 if (opoint
>= before
)
5633 opoint
+= PT
- before
;
5634 opoint_byte
+= PT_BYTE
- before_byte
;
5636 if (old_begv
> before
)
5638 old_begv
+= PT
- before
;
5639 old_begv_byte
+= PT_BYTE
- before_byte
;
5641 if (old_zv
>= before
)
5643 old_zv
+= PT
- before
;
5644 old_zv_byte
+= PT_BYTE
- before_byte
;
5647 /* If the restriction isn't what it should be, set it. */
5648 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5649 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5651 /* Handling the process output should not deactivate the mark. */
5652 Vdeactivate_mark
= odeactivate
;
5654 current_buffer
->read_only
= old_read_only
;
5655 SET_PT_BOTH (opoint
, opoint_byte
);
5656 unbind_to (count
, Qnil
);
5661 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5663 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5664 This is intended for use by asynchronous process output filters and sentinels. */)
5667 return (waiting_for_user_input_p
? Qt
: Qnil
);
5670 /* Sending data to subprocess */
5672 jmp_buf send_process_frame
;
5673 Lisp_Object process_sent_to
;
5676 send_process_trap ()
5678 SIGNAL_THREAD_CHECK (SIGPIPE
);
5679 sigunblock (sigmask (SIGPIPE
));
5680 longjmp (send_process_frame
, 1);
5683 /* Send some data to process PROC.
5684 BUF is the beginning of the data; LEN is the number of characters.
5685 OBJECT is the Lisp object that the data comes from. If OBJECT is
5686 nil or t, it means that the data comes from C string.
5688 If OBJECT is not nil, the data is encoded by PROC's coding-system
5689 for encoding before it is sent.
5691 This function can evaluate Lisp code and can garbage collect. */
5694 send_process (proc
, buf
, len
, object
)
5695 volatile Lisp_Object proc
;
5696 unsigned char *volatile buf
;
5698 volatile Lisp_Object object
;
5700 /* Use volatile to protect variables from being clobbered by longjmp. */
5701 struct Lisp_Process
*p
= XPROCESS (proc
);
5703 struct coding_system
*coding
;
5704 struct gcpro gcpro1
;
5705 SIGTYPE (*volatile old_sigpipe
) ();
5709 if (p
->raw_status_new
)
5711 if (! EQ (p
->status
, Qrun
))
5712 error ("Process %s not running", SDATA (p
->name
));
5714 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5716 coding
= proc_encode_coding_system
[p
->outfd
];
5717 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5719 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5720 || (BUFFERP (object
)
5721 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5724 p
->encode_coding_system
5725 = complement_process_encoding_system (p
->encode_coding_system
);
5726 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5728 /* The coding system for encoding was changed to raw-text
5729 because we sent a unibyte text previously. Now we are
5730 sending a multibyte text, thus we must encode it by the
5731 original coding system specified for the current process.
5733 Another reason we comming here is that the coding system
5734 was just complemented and new one was returned by
5735 complement_process_encoding_system. */
5736 setup_coding_system (p
->encode_coding_system
, coding
);
5737 Vlast_coding_system_used
= p
->encode_coding_system
;
5739 coding
->src_multibyte
= 1;
5743 /* For sending a unibyte text, character code conversion should
5744 not take place but EOL conversion should. So, setup raw-text
5745 or one of the subsidiary if we have not yet done it. */
5746 if (CODING_REQUIRE_ENCODING (coding
))
5748 if (CODING_REQUIRE_FLUSHING (coding
))
5750 /* But, before changing the coding, we must flush out data. */
5751 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5752 send_process (proc
, "", 0, Qt
);
5753 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5755 setup_coding_system (raw_text_coding_system
5756 (Vlast_coding_system_used
),
5758 coding
->src_multibyte
= 0;
5761 coding
->dst_multibyte
= 0;
5763 if (CODING_REQUIRE_ENCODING (coding
))
5765 coding
->dst_object
= Qt
;
5766 if (BUFFERP (object
))
5768 int from_byte
, from
, to
;
5769 int save_pt
, save_pt_byte
;
5770 struct buffer
*cur
= current_buffer
;
5772 set_buffer_internal (XBUFFER (object
));
5773 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5775 from_byte
= PTR_BYTE_POS (buf
);
5776 from
= BYTE_TO_CHAR (from_byte
);
5777 to
= BYTE_TO_CHAR (from_byte
+ len
);
5778 TEMP_SET_PT_BOTH (from
, from_byte
);
5779 encode_coding_object (coding
, object
, from
, from_byte
,
5780 to
, from_byte
+ len
, Qt
);
5781 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5782 set_buffer_internal (cur
);
5784 else if (STRINGP (object
))
5786 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5787 SBYTES (object
), Qt
);
5791 coding
->dst_object
= make_unibyte_string (buf
, len
);
5792 coding
->produced
= len
;
5795 len
= coding
->produced
;
5796 object
= coding
->dst_object
;
5797 buf
= SDATA (object
);
5800 if (pty_max_bytes
== 0)
5802 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5803 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5804 if (pty_max_bytes
< 0)
5805 pty_max_bytes
= 250;
5807 pty_max_bytes
= 250;
5809 /* Deduct one, to leave space for the eof. */
5813 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5814 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5815 when returning with longjmp despite being declared volatile. */
5816 if (!setjmp (send_process_frame
))
5818 process_sent_to
= proc
;
5823 /* Decide how much data we can send in one batch.
5824 Long lines need to be split into multiple batches. */
5827 /* Starting this at zero is always correct when not the first
5828 iteration because the previous iteration ended by sending C-d.
5829 It may not be correct for the first iteration
5830 if a partial line was sent in a separate send_process call.
5831 If that proves worth handling, we need to save linepos
5832 in the process object. */
5834 unsigned char *ptr
= (unsigned char *) buf
;
5835 unsigned char *end
= (unsigned char *) buf
+ len
;
5837 /* Scan through this text for a line that is too long. */
5838 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5846 /* If we found one, break the line there
5847 and put in a C-d to force the buffer through. */
5851 /* Send this batch, using one or more write calls. */
5854 int outfd
= p
->outfd
;
5855 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5856 #ifdef DATAGRAM_SOCKETS
5857 if (DATAGRAM_CHAN_P (outfd
))
5859 rv
= sendto (outfd
, (char *) buf
, this,
5860 0, datagram_address
[outfd
].sa
,
5861 datagram_address
[outfd
].len
);
5862 if (rv
< 0 && errno
== EMSGSIZE
)
5864 signal (SIGPIPE
, old_sigpipe
);
5865 report_file_error ("sending datagram",
5866 Fcons (proc
, Qnil
));
5872 rv
= emacs_write (outfd
, (char *) buf
, this);
5873 #ifdef ADAPTIVE_READ_BUFFERING
5874 if (p
->read_output_delay
> 0
5875 && p
->adaptive_read_buffering
== 1)
5877 p
->read_output_delay
= 0;
5878 process_output_delay_count
--;
5879 p
->read_output_skip
= 0;
5883 signal (SIGPIPE
, old_sigpipe
);
5889 || errno
== EWOULDBLOCK
5895 /* Buffer is full. Wait, accepting input;
5896 that may allow the program
5897 to finish doing output and read more. */
5901 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5902 /* A gross hack to work around a bug in FreeBSD.
5903 In the following sequence, read(2) returns
5907 write(2) 954 bytes, get EAGAIN
5908 read(2) 1024 bytes in process_read_output
5909 read(2) 11 bytes in process_read_output
5911 That is, read(2) returns more bytes than have
5912 ever been written successfully. The 1033 bytes
5913 read are the 1022 bytes written successfully
5914 after processing (for example with CRs added if
5915 the terminal is set up that way which it is
5916 here). The same bytes will be seen again in a
5917 later read(2), without the CRs. */
5919 if (errno
== EAGAIN
)
5922 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5924 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5926 /* Running filters might relocate buffers or strings.
5927 Arrange to relocate BUF. */
5928 if (BUFFERP (object
))
5929 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5930 else if (STRINGP (object
))
5931 offset
= buf
- SDATA (object
);
5933 #ifdef EMACS_HAS_USECS
5934 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5936 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5939 if (BUFFERP (object
))
5940 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5941 else if (STRINGP (object
))
5942 buf
= offset
+ SDATA (object
);
5947 /* This is a real error. */
5948 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5955 /* If we sent just part of the string, put in an EOF (C-d)
5956 to force it through, before we send the rest. */
5958 Fprocess_send_eof (proc
);
5963 signal (SIGPIPE
, old_sigpipe
);
5964 proc
= process_sent_to
;
5965 p
= XPROCESS (proc
);
5966 p
->raw_status_new
= 0;
5967 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5968 p
->tick
= ++process_tick
;
5969 deactivate_process (proc
);
5970 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5976 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5978 doc
: /* Send current contents of region as input to PROCESS.
5979 PROCESS may be a process, a buffer, the name of a process or buffer, or
5980 nil, indicating the current buffer's process.
5981 Called from program, takes three arguments, PROCESS, START and END.
5982 If the region is more than 500 characters long,
5983 it is sent in several bunches. This may happen even for shorter regions.
5984 Output from processes can arrive in between bunches. */)
5985 (process
, start
, end
)
5986 Lisp_Object process
, start
, end
;
5991 proc
= get_process (process
);
5992 validate_region (&start
, &end
);
5994 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5995 move_gap (XINT (start
));
5997 start1
= CHAR_TO_BYTE (XINT (start
));
5998 end1
= CHAR_TO_BYTE (XINT (end
));
5999 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
6000 Fcurrent_buffer ());
6005 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
6007 doc
: /* Send PROCESS the contents of STRING as input.
6008 PROCESS may be a process, a buffer, the name of a process or buffer, or
6009 nil, indicating the current buffer's process.
6010 If STRING is more than 500 characters long,
6011 it is sent in several bunches. This may happen even for shorter strings.
6012 Output from processes can arrive in between bunches. */)
6014 Lisp_Object process
, string
;
6017 CHECK_STRING (string
);
6018 proc
= get_process (process
);
6019 send_process (proc
, SDATA (string
),
6020 SBYTES (string
), string
);
6024 /* Return the foreground process group for the tty/pty that
6025 the process P uses. */
6027 emacs_get_tty_pgrp (p
)
6028 struct Lisp_Process
*p
;
6033 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
6036 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
6037 master side. Try the slave side. */
6038 fd
= emacs_open (SDATA (p
->tty_name
), O_RDONLY
, 0);
6042 ioctl (fd
, TIOCGPGRP
, &gid
);
6046 #endif /* defined (TIOCGPGRP ) */
6051 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
6052 Sprocess_running_child_p
, 0, 1, 0,
6053 doc
: /* Return t if PROCESS has given the terminal to a child.
6054 If the operating system does not make it possible to find out,
6055 return t unconditionally. */)
6057 Lisp_Object process
;
6059 /* Initialize in case ioctl doesn't exist or gives an error,
6060 in a way that will cause returning t. */
6063 struct Lisp_Process
*p
;
6065 proc
= get_process (process
);
6066 p
= XPROCESS (proc
);
6068 if (!EQ (p
->type
, Qreal
))
6069 error ("Process %s is not a subprocess",
6072 error ("Process %s is not active",
6075 gid
= emacs_get_tty_pgrp (p
);
6082 /* send a signal number SIGNO to PROCESS.
6083 If CURRENT_GROUP is t, that means send to the process group
6084 that currently owns the terminal being used to communicate with PROCESS.
6085 This is used for various commands in shell mode.
6086 If CURRENT_GROUP is lambda, that means send to the process group
6087 that currently owns the terminal, but only if it is NOT the shell itself.
6089 If NOMSG is zero, insert signal-announcements into process's buffers
6092 If we can, we try to signal PROCESS by sending control characters
6093 down the pty. This allows us to signal inferiors who have changed
6094 their uid, for which killpg would return an EPERM error. */
6097 process_send_signal (process
, signo
, current_group
, nomsg
)
6098 Lisp_Object process
;
6100 Lisp_Object current_group
;
6104 register struct Lisp_Process
*p
;
6108 proc
= get_process (process
);
6109 p
= XPROCESS (proc
);
6111 if (!EQ (p
->type
, Qreal
))
6112 error ("Process %s is not a subprocess",
6115 error ("Process %s is not active",
6119 current_group
= Qnil
;
6121 /* If we are using pgrps, get a pgrp number and make it negative. */
6122 if (NILP (current_group
))
6123 /* Send the signal to the shell's process group. */
6127 #ifdef SIGNALS_VIA_CHARACTERS
6128 /* If possible, send signals to the entire pgrp
6129 by sending an input character to it. */
6131 /* TERMIOS is the latest and bestest, and seems most likely to
6132 work. If the system has it, use it. */
6135 cc_t
*sig_char
= NULL
;
6137 tcgetattr (p
->infd
, &t
);
6142 sig_char
= &t
.c_cc
[VINTR
];
6146 sig_char
= &t
.c_cc
[VQUIT
];
6150 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
6151 sig_char
= &t
.c_cc
[VSWTCH
];
6153 sig_char
= &t
.c_cc
[VSUSP
];
6158 if (sig_char
&& *sig_char
!= CDISABLE
)
6160 send_process (proc
, sig_char
, 1, Qnil
);
6163 /* If we can't send the signal with a character,
6164 fall through and send it another way. */
6165 #else /* ! HAVE_TERMIOS */
6167 /* On Berkeley descendants, the following IOCTL's retrieve the
6168 current control characters. */
6169 #if defined (TIOCGLTC) && defined (TIOCGETC)
6177 ioctl (p
->infd
, TIOCGETC
, &c
);
6178 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
6181 ioctl (p
->infd
, TIOCGETC
, &c
);
6182 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
6186 ioctl (p
->infd
, TIOCGLTC
, &lc
);
6187 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
6189 #endif /* ! defined (SIGTSTP) */
6192 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6194 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
6201 ioctl (p
->infd
, TCGETA
, &t
);
6202 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
6205 ioctl (p
->infd
, TCGETA
, &t
);
6206 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
6210 ioctl (p
->infd
, TCGETA
, &t
);
6211 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
6213 #endif /* ! defined (SIGTSTP) */
6215 #else /* ! defined (TCGETA) */
6216 Your configuration files are messed up
.
6217 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
6218 you'd better be using one of the alternatives above! */
6219 #endif /* ! defined (TCGETA) */
6220 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6221 /* In this case, the code above should alway return. */
6223 #endif /* ! defined HAVE_TERMIOS */
6225 /* The code above may fall through if it can't
6226 handle the signal. */
6227 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6230 /* Get the current pgrp using the tty itself, if we have that.
6231 Otherwise, use the pty to get the pgrp.
6232 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6233 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6234 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6235 His patch indicates that if TIOCGPGRP returns an error, then
6236 we should just assume that p->pid is also the process group id. */
6238 gid
= emacs_get_tty_pgrp (p
);
6241 /* If we can't get the information, assume
6242 the shell owns the tty. */
6245 /* It is not clear whether anything really can set GID to -1.
6246 Perhaps on some system one of those ioctls can or could do so.
6247 Or perhaps this is vestigial. */
6250 #else /* ! defined (TIOCGPGRP ) */
6251 /* Can't select pgrps on this system, so we know that
6252 the child itself heads the pgrp. */
6254 #endif /* ! defined (TIOCGPGRP ) */
6256 /* If current_group is lambda, and the shell owns the terminal,
6257 don't send any signal. */
6258 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6266 p
->raw_status_new
= 0;
6268 p
->tick
= ++process_tick
;
6271 status_notify (NULL
);
6272 redisplay_preserve_echo_area (13);
6275 #endif /* ! defined (SIGCONT) */
6279 flush_pending_output (p
->infd
);
6283 /* If we don't have process groups, send the signal to the immediate
6284 subprocess. That isn't really right, but it's better than any
6285 obvious alternative. */
6288 kill (p
->pid
, signo
);
6292 /* gid may be a pid, or minus a pgrp's number */
6294 if (!NILP (current_group
))
6296 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6297 EMACS_KILLPG (gid
, signo
);
6304 #else /* ! defined (TIOCSIGSEND) */
6305 EMACS_KILLPG (gid
, signo
);
6306 #endif /* ! defined (TIOCSIGSEND) */
6309 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6310 doc
: /* Interrupt process PROCESS.
6311 PROCESS may be a process, a buffer, or the name of a process or buffer.
6312 No arg or nil means current buffer's process.
6313 Second arg CURRENT-GROUP non-nil means send signal to
6314 the current process-group of the process's controlling terminal
6315 rather than to the process's own process group.
6316 If the process is a shell, this means interrupt current subjob
6317 rather than the shell.
6319 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6320 don't send the signal. */)
6321 (process
, current_group
)
6322 Lisp_Object process
, current_group
;
6324 process_send_signal (process
, SIGINT
, current_group
, 0);
6328 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6329 doc
: /* Kill process PROCESS. May be process or name of one.
6330 See function `interrupt-process' for more details on usage. */)
6331 (process
, current_group
)
6332 Lisp_Object process
, current_group
;
6334 process_send_signal (process
, SIGKILL
, current_group
, 0);
6338 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6339 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6340 See function `interrupt-process' for more details on usage. */)
6341 (process
, current_group
)
6342 Lisp_Object process
, current_group
;
6344 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6348 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6349 doc
: /* Stop process PROCESS. May be process or name of one.
6350 See function `interrupt-process' for more details on usage.
6351 If PROCESS is a network or serial process, inhibit handling of incoming
6353 (process
, current_group
)
6354 Lisp_Object process
, current_group
;
6357 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6359 struct Lisp_Process
*p
;
6361 p
= XPROCESS (process
);
6362 if (NILP (p
->command
)
6365 FD_CLR (p
->infd
, &input_wait_mask
);
6366 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6373 error ("No SIGTSTP support");
6375 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6380 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6381 doc
: /* Continue process PROCESS. May be process or name of one.
6382 See function `interrupt-process' for more details on usage.
6383 If PROCESS is a network or serial process, resume handling of incoming
6385 (process
, current_group
)
6386 Lisp_Object process
, current_group
;
6389 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6391 struct Lisp_Process
*p
;
6393 p
= XPROCESS (process
);
6394 if (EQ (p
->command
, Qt
)
6396 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6398 FD_SET (p
->infd
, &input_wait_mask
);
6399 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6401 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6402 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6405 tcflush (p
->infd
, TCIFLUSH
);
6413 process_send_signal (process
, SIGCONT
, current_group
, 0);
6415 error ("No SIGCONT support");
6420 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6421 2, 2, "sProcess (name or number): \nnSignal code: ",
6422 doc
: /* Send PROCESS the signal with code SIGCODE.
6423 PROCESS may also be a number specifying the process id of the
6424 process to signal; in this case, the process need not be a child of
6426 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6428 Lisp_Object process
, sigcode
;
6432 if (INTEGERP (process
))
6434 pid
= XINT (process
);
6438 if (FLOATP (process
))
6440 pid
= (pid_t
) XFLOAT_DATA (process
);
6444 if (STRINGP (process
))
6447 if (tem
= Fget_process (process
), NILP (tem
))
6449 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6456 process
= get_process (process
);
6461 CHECK_PROCESS (process
);
6462 pid
= XPROCESS (process
)->pid
;
6464 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6468 #define parse_signal(NAME, VALUE) \
6469 else if (!xstrcasecmp (name, NAME)) \
6470 XSETINT (sigcode, VALUE)
6472 if (INTEGERP (sigcode
))
6476 unsigned char *name
;
6478 CHECK_SYMBOL (sigcode
);
6479 name
= SDATA (SYMBOL_NAME (sigcode
));
6481 if (!strncmp(name
, "SIG", 3) || !strncmp(name
, "sig", 3))
6487 parse_signal ("usr1", SIGUSR1
);
6490 parse_signal ("usr2", SIGUSR2
);
6493 parse_signal ("term", SIGTERM
);
6496 parse_signal ("hup", SIGHUP
);
6499 parse_signal ("int", SIGINT
);
6502 parse_signal ("quit", SIGQUIT
);
6505 parse_signal ("ill", SIGILL
);
6508 parse_signal ("abrt", SIGABRT
);
6511 parse_signal ("emt", SIGEMT
);
6514 parse_signal ("kill", SIGKILL
);
6517 parse_signal ("fpe", SIGFPE
);
6520 parse_signal ("bus", SIGBUS
);
6523 parse_signal ("segv", SIGSEGV
);
6526 parse_signal ("sys", SIGSYS
);
6529 parse_signal ("pipe", SIGPIPE
);
6532 parse_signal ("alrm", SIGALRM
);
6535 parse_signal ("urg", SIGURG
);
6538 parse_signal ("stop", SIGSTOP
);
6541 parse_signal ("tstp", SIGTSTP
);
6544 parse_signal ("cont", SIGCONT
);
6547 parse_signal ("chld", SIGCHLD
);
6550 parse_signal ("ttin", SIGTTIN
);
6553 parse_signal ("ttou", SIGTTOU
);
6556 parse_signal ("io", SIGIO
);
6559 parse_signal ("xcpu", SIGXCPU
);
6562 parse_signal ("xfsz", SIGXFSZ
);
6565 parse_signal ("vtalrm", SIGVTALRM
);
6568 parse_signal ("prof", SIGPROF
);
6571 parse_signal ("winch", SIGWINCH
);
6574 parse_signal ("info", SIGINFO
);
6577 error ("Undefined signal name %s", name
);
6582 return make_number (kill (pid
, XINT (sigcode
)));
6585 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6586 doc
: /* Make PROCESS see end-of-file in its input.
6587 EOF comes after any text already sent to it.
6588 PROCESS may be a process, a buffer, the name of a process or buffer, or
6589 nil, indicating the current buffer's process.
6590 If PROCESS is a network connection, or is a process communicating
6591 through a pipe (as opposed to a pty), then you cannot send any more
6592 text to PROCESS after you call this function.
6593 If PROCESS is a serial process, wait until all output written to the
6594 process has been transmitted to the serial port. */)
6596 Lisp_Object process
;
6599 struct coding_system
*coding
;
6601 if (DATAGRAM_CONN_P (process
))
6604 proc
= get_process (process
);
6605 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6607 /* Make sure the process is really alive. */
6608 if (XPROCESS (proc
)->raw_status_new
)
6609 update_status (XPROCESS (proc
));
6610 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6611 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6613 if (CODING_REQUIRE_FLUSHING (coding
))
6615 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6616 send_process (proc
, "", 0, Qnil
);
6619 if (XPROCESS (proc
)->pty_flag
)
6620 send_process (proc
, "\004", 1, Qnil
);
6621 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6624 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6625 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6627 /* Do nothing on Windows because writes are blocking. */
6631 int old_outfd
, new_outfd
;
6633 #ifdef HAVE_SHUTDOWN
6634 /* If this is a network connection, or socketpair is used
6635 for communication with the subprocess, call shutdown to cause EOF.
6636 (In some old system, shutdown to socketpair doesn't work.
6637 Then we just can't win.) */
6638 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6639 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6640 shutdown (XPROCESS (proc
)->outfd
, 1);
6641 /* In case of socketpair, outfd == infd, so don't close it. */
6642 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6643 emacs_close (XPROCESS (proc
)->outfd
);
6644 #else /* not HAVE_SHUTDOWN */
6645 emacs_close (XPROCESS (proc
)->outfd
);
6646 #endif /* not HAVE_SHUTDOWN */
6647 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6650 old_outfd
= XPROCESS (proc
)->outfd
;
6652 if (!proc_encode_coding_system
[new_outfd
])
6653 proc_encode_coding_system
[new_outfd
]
6654 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6655 bcopy (proc_encode_coding_system
[old_outfd
],
6656 proc_encode_coding_system
[new_outfd
],
6657 sizeof (struct coding_system
));
6658 bzero (proc_encode_coding_system
[old_outfd
],
6659 sizeof (struct coding_system
));
6661 XPROCESS (proc
)->outfd
= new_outfd
;
6666 /* Kill all processes associated with `buffer'.
6667 If `buffer' is nil, kill all processes */
6670 kill_buffer_processes (buffer
)
6673 Lisp_Object tail
, proc
;
6675 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6677 proc
= XCDR (XCAR (tail
));
6679 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6681 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
6682 Fdelete_process (proc
);
6683 else if (XPROCESS (proc
)->infd
>= 0)
6684 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6689 /* On receipt of a signal that a child status has changed, loop asking
6690 about children with changed statuses until the system says there
6693 All we do is change the status; we do not run sentinels or print
6694 notifications. That is saved for the next time keyboard input is
6695 done, in order to avoid timing errors.
6697 ** WARNING: this can be called during garbage collection.
6698 Therefore, it must not be fooled by the presence of mark bits in
6701 ** USG WARNING: Although it is not obvious from the documentation
6702 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6703 signal() before executing at least one wait(), otherwise the
6704 handler will be called again, resulting in an infinite loop. The
6705 relevant portion of the documentation reads "SIGCLD signals will be
6706 queued and the signal-catching function will be continually
6707 reentered until the queue is empty". Invoking signal() causes the
6708 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6711 ** Malloc WARNING: This should never call malloc either directly or
6712 indirectly; if it does, that is a bug */
6716 sigchld_handler (signo
)
6719 int old_errno
= errno
;
6721 register struct Lisp_Process
*p
;
6722 extern EMACS_TIME
*input_available_clear_time
;
6724 SIGNAL_THREAD_CHECK (signo
);
6735 #endif /* no WUNTRACED */
6736 /* Keep trying to get a status until we get a definitive result. */
6740 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6742 while (pid
< 0 && errno
== EINTR
);
6746 /* PID == 0 means no processes found, PID == -1 means a real
6747 failure. We have done all our job, so return. */
6749 /* USG systems forget handlers when they are used;
6750 must reestablish each time */
6751 #if defined (USG) && !defined (POSIX_SIGNALS)
6752 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6759 #endif /* no WNOHANG */
6761 /* Find the process that signaled us, and record its status. */
6763 /* The process can have been deleted by Fdelete_process. */
6764 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6766 Lisp_Object xpid
= XCAR (tail
);
6767 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6768 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6770 XSETCAR (tail
, Qnil
);
6771 goto sigchld_end_of_loop
;
6775 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6777 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6779 proc
= XCDR (XCAR (tail
));
6780 p
= XPROCESS (proc
);
6781 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6786 /* Look for an asynchronous process whose pid hasn't been filled
6789 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6791 proc
= XCDR (XCAR (tail
));
6792 p
= XPROCESS (proc
);
6798 /* Change the status of the process that was found. */
6801 int clear_desc_flag
= 0;
6803 p
->tick
= ++process_tick
;
6805 p
->raw_status_new
= 1;
6807 /* If process has terminated, stop waiting for its output. */
6808 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6810 clear_desc_flag
= 1;
6812 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6813 if (clear_desc_flag
)
6815 FD_CLR (p
->infd
, &input_wait_mask
);
6816 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6819 /* Tell wait_reading_process_output that it needs to wake up and
6821 if (input_available_clear_time
)
6822 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6825 /* There was no asynchronous process found for that pid: we have
6826 a synchronous process. */
6829 synch_process_alive
= 0;
6831 /* Report the status of the synchronous process. */
6833 synch_process_retcode
= WRETCODE (w
);
6834 else if (WIFSIGNALED (w
))
6835 synch_process_termsig
= WTERMSIG (w
);
6837 /* Tell wait_reading_process_output that it needs to wake up and
6839 if (input_available_clear_time
)
6840 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6843 sigchld_end_of_loop
:
6846 /* On some systems, we must return right away.
6847 If any more processes want to signal us, we will
6849 Otherwise (on systems that have WNOHANG), loop around
6850 to use up all the processes that have something to tell us. */
6851 #if (defined WINDOWSNT \
6852 || (defined USG && !defined GNU_LINUX \
6853 && !(defined HPUX && defined WNOHANG)))
6854 #if defined (USG) && ! defined (POSIX_SIGNALS)
6855 signal (signo
, sigchld_handler
);
6859 #endif /* USG, but not HPUX with WNOHANG */
6862 #endif /* SIGCHLD */
6866 exec_sentinel_unwind (data
)
6869 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6874 exec_sentinel_error_handler (error
)
6877 cmd_error_internal (error
, "error in process sentinel: ");
6879 update_echo_area ();
6880 Fsleep_for (make_number (2), Qnil
);
6885 exec_sentinel (proc
, reason
)
6886 Lisp_Object proc
, reason
;
6888 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6889 register struct Lisp_Process
*p
= XPROCESS (proc
);
6890 int count
= SPECPDL_INDEX ();
6891 int outer_running_asynch_code
= running_asynch_code
;
6892 int waiting
= waiting_for_user_input_p
;
6894 if (inhibit_sentinels
)
6897 /* No need to gcpro these, because all we do with them later
6898 is test them for EQness, and none of them should be a string. */
6899 odeactivate
= Vdeactivate_mark
;
6900 XSETBUFFER (obuffer
, current_buffer
);
6901 okeymap
= current_buffer
->keymap
;
6903 sentinel
= p
->sentinel
;
6904 if (NILP (sentinel
))
6907 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6908 assure that it gets restored no matter how the sentinel exits. */
6910 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6911 /* Inhibit quit so that random quits don't screw up a running filter. */
6912 specbind (Qinhibit_quit
, Qt
);
6913 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6915 /* In case we get recursively called,
6916 and we already saved the match data nonrecursively,
6917 save the same match data in safely recursive fashion. */
6918 if (outer_running_asynch_code
)
6921 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6922 restore_search_regs ();
6923 record_unwind_save_match_data ();
6924 Fset_match_data (tem
, Qt
);
6927 /* For speed, if a search happens within this code,
6928 save the match data in a special nonrecursive fashion. */
6929 running_asynch_code
= 1;
6931 internal_condition_case_1 (read_process_output_call
,
6933 Fcons (proc
, Fcons (reason
, Qnil
))),
6934 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6935 exec_sentinel_error_handler
);
6937 /* If we saved the match data nonrecursively, restore it now. */
6938 restore_search_regs ();
6939 running_asynch_code
= outer_running_asynch_code
;
6941 Vdeactivate_mark
= odeactivate
;
6943 /* Restore waiting_for_user_input_p as it was
6944 when we were called, in case the filter clobbered it. */
6945 waiting_for_user_input_p
= waiting
;
6948 if (! EQ (Fcurrent_buffer (), obuffer
)
6949 || ! EQ (current_buffer
->keymap
, okeymap
))
6951 /* But do it only if the caller is actually going to read events.
6952 Otherwise there's no need to make him wake up, and it could
6953 cause trouble (for example it would make sit_for return). */
6954 if (waiting_for_user_input_p
== -1)
6955 record_asynch_buffer_change ();
6957 unbind_to (count
, Qnil
);
6960 /* Report all recent events of a change in process status
6961 (either run the sentinel or output a message).
6962 This is usually done while Emacs is waiting for keyboard input
6963 but can be done at other times. */
6966 status_notify (deleting_process
)
6967 struct Lisp_Process
*deleting_process
;
6969 register Lisp_Object proc
, buffer
;
6970 Lisp_Object tail
, msg
;
6971 struct gcpro gcpro1
, gcpro2
;
6975 /* We need to gcpro tail; if read_process_output calls a filter
6976 which deletes a process and removes the cons to which tail points
6977 from Vprocess_alist, and then causes a GC, tail is an unprotected
6981 /* Set this now, so that if new processes are created by sentinels
6982 that we run, we get called again to handle their status changes. */
6983 update_tick
= process_tick
;
6985 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6988 register struct Lisp_Process
*p
;
6990 proc
= Fcdr (XCAR (tail
));
6991 p
= XPROCESS (proc
);
6993 if (p
->tick
!= p
->update_tick
)
6995 p
->update_tick
= p
->tick
;
6997 /* If process is still active, read any output that remains. */
6998 while (! EQ (p
->filter
, Qt
)
6999 && ! EQ (p
->status
, Qconnect
)
7000 && ! EQ (p
->status
, Qlisten
)
7001 /* Network or serial process not stopped: */
7002 && ! EQ (p
->command
, Qt
)
7004 && p
!= deleting_process
7005 && read_process_output (proc
, p
->infd
) > 0);
7009 /* Get the text to use for the message. */
7010 if (p
->raw_status_new
)
7012 msg
= status_message (p
);
7014 /* If process is terminated, deactivate it or delete it. */
7016 if (CONSP (p
->status
))
7017 symbol
= XCAR (p
->status
);
7019 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
7020 || EQ (symbol
, Qclosed
))
7022 if (delete_exited_processes
)
7023 remove_process (proc
);
7025 deactivate_process (proc
);
7028 /* The actions above may have further incremented p->tick.
7029 So set p->update_tick again
7030 so that an error in the sentinel will not cause
7031 this code to be run again. */
7032 p
->update_tick
= p
->tick
;
7033 /* Now output the message suitably. */
7034 if (!NILP (p
->sentinel
))
7035 exec_sentinel (proc
, msg
);
7036 /* Don't bother with a message in the buffer
7037 when a process becomes runnable. */
7038 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
7040 Lisp_Object ro
, tem
;
7041 struct buffer
*old
= current_buffer
;
7042 int opoint
, opoint_byte
;
7043 int before
, before_byte
;
7045 ro
= XBUFFER (buffer
)->read_only
;
7047 /* Avoid error if buffer is deleted
7048 (probably that's why the process is dead, too) */
7049 if (NILP (XBUFFER (buffer
)->name
))
7051 Fset_buffer (buffer
);
7054 opoint_byte
= PT_BYTE
;
7055 /* Insert new output into buffer
7056 at the current end-of-output marker,
7057 thus preserving logical ordering of input and output. */
7058 if (XMARKER (p
->mark
)->buffer
)
7059 Fgoto_char (p
->mark
);
7061 SET_PT_BOTH (ZV
, ZV_BYTE
);
7064 before_byte
= PT_BYTE
;
7066 tem
= current_buffer
->read_only
;
7067 current_buffer
->read_only
= Qnil
;
7068 insert_string ("\nProcess ");
7069 Finsert (1, &p
->name
);
7070 insert_string (" ");
7072 current_buffer
->read_only
= tem
;
7073 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
7075 if (opoint
>= before
)
7076 SET_PT_BOTH (opoint
+ (PT
- before
),
7077 opoint_byte
+ (PT_BYTE
- before_byte
));
7079 SET_PT_BOTH (opoint
, opoint_byte
);
7081 set_buffer_internal (old
);
7086 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
7091 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
7092 Sset_process_coding_system
, 1, 3, 0,
7093 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
7094 DECODING will be used to decode subprocess output and ENCODING to
7095 encode subprocess input. */)
7096 (process
, decoding
, encoding
)
7097 register Lisp_Object process
, decoding
, encoding
;
7099 register struct Lisp_Process
*p
;
7101 CHECK_PROCESS (process
);
7102 p
= XPROCESS (process
);
7104 error ("Input file descriptor of %s closed", SDATA (p
->name
));
7106 error ("Output file descriptor of %s closed", SDATA (p
->name
));
7107 Fcheck_coding_system (decoding
);
7108 Fcheck_coding_system (encoding
);
7109 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
7110 p
->decode_coding_system
= decoding
;
7111 p
->encode_coding_system
= encoding
;
7112 setup_process_coding_systems (process
);
7117 DEFUN ("process-coding-system",
7118 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
7119 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
7121 register Lisp_Object process
;
7123 CHECK_PROCESS (process
);
7124 return Fcons (XPROCESS (process
)->decode_coding_system
,
7125 XPROCESS (process
)->encode_coding_system
);
7128 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
7129 Sset_process_filter_multibyte
, 2, 2, 0,
7130 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
7131 If FLAG is non-nil, the filter is given multibyte strings.
7132 If FLAG is nil, the filter is given unibyte strings. In this case,
7133 all character code conversion except for end-of-line conversion is
7136 Lisp_Object process
, flag
;
7138 register struct Lisp_Process
*p
;
7140 CHECK_PROCESS (process
);
7141 p
= XPROCESS (process
);
7143 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
7144 setup_process_coding_systems (process
);
7149 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
7150 Sprocess_filter_multibyte_p
, 1, 1, 0,
7151 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
7153 Lisp_Object process
;
7155 register struct Lisp_Process
*p
;
7156 struct coding_system
*coding
;
7158 CHECK_PROCESS (process
);
7159 p
= XPROCESS (process
);
7160 coding
= proc_decode_coding_system
[p
->infd
];
7161 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
7166 /* Add DESC to the set of keyboard input descriptors. */
7169 add_keyboard_wait_descriptor (desc
)
7172 FD_SET (desc
, &input_wait_mask
);
7173 FD_SET (desc
, &non_process_wait_mask
);
7174 if (desc
> max_keyboard_desc
)
7175 max_keyboard_desc
= desc
;
7178 static int add_gpm_wait_descriptor_called_flag
;
7181 add_gpm_wait_descriptor (desc
)
7184 if (! add_gpm_wait_descriptor_called_flag
)
7185 FD_CLR (0, &input_wait_mask
);
7186 add_gpm_wait_descriptor_called_flag
= 1;
7187 FD_SET (desc
, &input_wait_mask
);
7188 FD_SET (desc
, &gpm_wait_mask
);
7189 if (desc
> max_gpm_desc
)
7190 max_gpm_desc
= desc
;
7193 /* From now on, do not expect DESC to give keyboard input. */
7196 delete_keyboard_wait_descriptor (desc
)
7200 int lim
= max_keyboard_desc
;
7202 FD_CLR (desc
, &input_wait_mask
);
7203 FD_CLR (desc
, &non_process_wait_mask
);
7205 if (desc
== max_keyboard_desc
)
7206 for (fd
= 0; fd
< lim
; fd
++)
7207 if (FD_ISSET (fd
, &input_wait_mask
)
7208 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7209 && !FD_ISSET (fd
, &gpm_wait_mask
))
7210 max_keyboard_desc
= fd
;
7214 delete_gpm_wait_descriptor (desc
)
7218 int lim
= max_gpm_desc
;
7220 FD_CLR (desc
, &input_wait_mask
);
7221 FD_CLR (desc
, &non_process_wait_mask
);
7223 if (desc
== max_gpm_desc
)
7224 for (fd
= 0; fd
< lim
; fd
++)
7225 if (FD_ISSET (fd
, &input_wait_mask
)
7226 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7227 && !FD_ISSET (fd
, &non_process_wait_mask
))
7231 /* Return nonzero if *MASK has a bit set
7232 that corresponds to one of the keyboard input descriptors. */
7235 keyboard_bit_set (mask
)
7240 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
7241 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7242 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7248 /* Stop reading input from keyboard sources. */
7251 hold_keyboard_input (void)
7256 /* Resume reading input from keyboard sources. */
7259 unhold_keyboard_input (void)
7264 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7267 kbd_on_hold_p (void)
7269 return kbd_is_on_hold
;
7273 /* Enumeration of and access to system processes a-la ps(1). */
7275 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7277 doc
: /* Return a list of numerical process IDs of all running processes.
7278 If this functionality is unsupported, return nil.
7280 See `process-attributes' for getting attributes of a process given its ID. */)
7283 return list_system_processes ();
7286 DEFUN ("process-attributes", Fprocess_attributes
,
7287 Sprocess_attributes
, 1, 1, 0,
7288 doc
: /* Return attributes of the process given by its PID, a number.
7290 Value is an alist where each element is a cons cell of the form
7294 If this functionality is unsupported, the value is nil.
7296 See `list-system-processes' for getting a list of all process IDs.
7298 The KEYs of the attributes that this function may return are listed
7299 below, together with the type of the associated VALUE (in parentheses).
7300 Not all platforms support all of these attributes; unsupported
7301 attributes will not appear in the returned alist.
7302 Unless explicitly indicated otherwise, numbers can have either
7303 integer or floating point values.
7305 euid -- Effective user User ID of the process (number)
7306 user -- User name corresponding to euid (string)
7307 egid -- Effective user Group ID of the process (number)
7308 group -- Group name corresponding to egid (string)
7309 comm -- Command name (executable name only) (string)
7310 state -- Process state code, such as "S", "R", or "T" (string)
7311 ppid -- Parent process ID (number)
7312 pgrp -- Process group ID (number)
7313 sess -- Session ID, i.e. process ID of session leader (number)
7314 ttname -- Controlling tty name (string)
7315 tpgid -- ID of foreground process group on the process's tty (number)
7316 minflt -- number of minor page faults (number)
7317 majflt -- number of major page faults (number)
7318 cminflt -- cumulative number of minor page faults (number)
7319 cmajflt -- cumulative number of major page faults (number)
7320 utime -- user time used by the process, in the (HIGH LOW USEC) format
7321 stime -- system time used by the process, in the (HIGH LOW USEC) format
7322 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7323 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7324 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7325 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7326 pri -- priority of the process (number)
7327 nice -- nice value of the process (number)
7328 thcount -- process thread count (number)
7329 start -- time the process started, in the (HIGH LOW USEC) format
7330 vsize -- virtual memory size of the process in KB's (number)
7331 rss -- resident set size of the process in KB's (number)
7332 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7333 pcpu -- percents of CPU time used by the process (floating-point number)
7334 pmem -- percents of total physical memory used by process's resident set
7335 (floating-point number)
7336 args -- command line which invoked the process (string). */)
7341 return system_process_attributes (pid
);
7349 inhibit_sentinels
= 0;
7353 if (! noninteractive
|| initialized
)
7355 signal (SIGCHLD
, sigchld_handler
);
7358 FD_ZERO (&input_wait_mask
);
7359 FD_ZERO (&non_keyboard_wait_mask
);
7360 FD_ZERO (&non_process_wait_mask
);
7361 max_process_desc
= 0;
7363 #ifdef NON_BLOCKING_CONNECT
7364 FD_ZERO (&connect_wait_mask
);
7365 num_pending_connects
= 0;
7368 #ifdef ADAPTIVE_READ_BUFFERING
7369 process_output_delay_count
= 0;
7370 process_output_skip
= 0;
7373 /* Don't do this, it caused infinite select loops. The display
7374 method should call add_keyboard_wait_descriptor on stdin if it
7377 FD_SET (0, &input_wait_mask
);
7380 Vprocess_alist
= Qnil
;
7382 deleted_pid_list
= Qnil
;
7384 for (i
= 0; i
< MAXDESC
; i
++)
7386 chan_process
[i
] = Qnil
;
7387 proc_buffered_char
[i
] = -1;
7389 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
7390 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
7391 #ifdef DATAGRAM_SOCKETS
7392 bzero (datagram_address
, sizeof datagram_address
);
7397 Lisp_Object subfeatures
= Qnil
;
7398 const struct socket_options
*sopt
;
7400 #define ADD_SUBFEATURE(key, val) \
7401 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7403 #ifdef NON_BLOCKING_CONNECT
7404 ADD_SUBFEATURE (QCnowait
, Qt
);
7406 #ifdef DATAGRAM_SOCKETS
7407 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7409 #ifdef HAVE_SEQPACKET
7410 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7412 #ifdef HAVE_LOCAL_SOCKETS
7413 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7415 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7417 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7419 #ifdef HAVE_GETSOCKNAME
7420 ADD_SUBFEATURE (QCservice
, Qt
);
7422 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7423 ADD_SUBFEATURE (QCserver
, Qt
);
7426 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7427 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7429 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7431 #endif /* HAVE_SOCKETS */
7433 #if defined (DARWIN_OS)
7434 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7435 processes. As such, we only change the default value. */
7438 char *release
= get_operating_system_release();
7439 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7440 && release
[1] == '.')) {
7441 Vprocess_connection_type
= Qnil
;
7450 Qprocessp
= intern_c_string ("processp");
7451 staticpro (&Qprocessp
);
7452 Qrun
= intern_c_string ("run");
7454 Qstop
= intern_c_string ("stop");
7456 Qsignal
= intern_c_string ("signal");
7457 staticpro (&Qsignal
);
7459 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7462 Qexit = intern_c_string ("exit");
7463 staticpro (&Qexit); */
7465 Qopen
= intern_c_string ("open");
7467 Qclosed
= intern_c_string ("closed");
7468 staticpro (&Qclosed
);
7469 Qconnect
= intern_c_string ("connect");
7470 staticpro (&Qconnect
);
7471 Qfailed
= intern_c_string ("failed");
7472 staticpro (&Qfailed
);
7473 Qlisten
= intern_c_string ("listen");
7474 staticpro (&Qlisten
);
7475 Qlocal
= intern_c_string ("local");
7476 staticpro (&Qlocal
);
7477 Qipv4
= intern_c_string ("ipv4");
7480 Qipv6
= intern_c_string ("ipv6");
7483 Qdatagram
= intern_c_string ("datagram");
7484 staticpro (&Qdatagram
);
7485 Qseqpacket
= intern_c_string ("seqpacket");
7486 staticpro (&Qseqpacket
);
7488 QCport
= intern_c_string (":port");
7489 staticpro (&QCport
);
7490 QCspeed
= intern_c_string (":speed");
7491 staticpro (&QCspeed
);
7492 QCprocess
= intern_c_string (":process");
7493 staticpro (&QCprocess
);
7495 QCbytesize
= intern_c_string (":bytesize");
7496 staticpro (&QCbytesize
);
7497 QCstopbits
= intern_c_string (":stopbits");
7498 staticpro (&QCstopbits
);
7499 QCparity
= intern_c_string (":parity");
7500 staticpro (&QCparity
);
7501 Qodd
= intern_c_string ("odd");
7503 Qeven
= intern_c_string ("even");
7505 QCflowcontrol
= intern_c_string (":flowcontrol");
7506 staticpro (&QCflowcontrol
);
7507 Qhw
= intern_c_string ("hw");
7509 Qsw
= intern_c_string ("sw");
7511 QCsummary
= intern_c_string (":summary");
7512 staticpro (&QCsummary
);
7514 Qreal
= intern_c_string ("real");
7516 Qnetwork
= intern_c_string ("network");
7517 staticpro (&Qnetwork
);
7518 Qserial
= intern_c_string ("serial");
7519 staticpro (&Qserial
);
7521 QCname
= intern_c_string (":name");
7522 staticpro (&QCname
);
7523 QCbuffer
= intern_c_string (":buffer");
7524 staticpro (&QCbuffer
);
7525 QChost
= intern_c_string (":host");
7526 staticpro (&QChost
);
7527 QCservice
= intern_c_string (":service");
7528 staticpro (&QCservice
);
7529 QCtype
= intern_c_string (":type");
7530 staticpro (&QCtype
);
7531 QClocal
= intern_c_string (":local");
7532 staticpro (&QClocal
);
7533 QCremote
= intern_c_string (":remote");
7534 staticpro (&QCremote
);
7535 QCcoding
= intern_c_string (":coding");
7536 staticpro (&QCcoding
);
7537 QCserver
= intern_c_string (":server");
7538 staticpro (&QCserver
);
7539 QCnowait
= intern_c_string (":nowait");
7540 staticpro (&QCnowait
);
7541 QCsentinel
= intern_c_string (":sentinel");
7542 staticpro (&QCsentinel
);
7543 QClog
= intern_c_string (":log");
7545 QCnoquery
= intern_c_string (":noquery");
7546 staticpro (&QCnoquery
);
7547 QCstop
= intern_c_string (":stop");
7548 staticpro (&QCstop
);
7549 QCoptions
= intern_c_string (":options");
7550 staticpro (&QCoptions
);
7551 QCplist
= intern_c_string (":plist");
7552 staticpro (&QCplist
);
7554 Qlast_nonmenu_event
= intern_c_string ("last-nonmenu-event");
7555 staticpro (&Qlast_nonmenu_event
);
7557 staticpro (&Vprocess_alist
);
7559 staticpro (&deleted_pid_list
);
7562 Qeuid
= intern_c_string ("euid");
7564 Qegid
= intern_c_string ("egid");
7566 Quser
= intern_c_string ("user");
7568 Qgroup
= intern_c_string ("group");
7569 staticpro (&Qgroup
);
7570 Qcomm
= intern_c_string ("comm");
7572 Qstate
= intern_c_string ("state");
7573 staticpro (&Qstate
);
7574 Qppid
= intern_c_string ("ppid");
7576 Qpgrp
= intern_c_string ("pgrp");
7578 Qsess
= intern_c_string ("sess");
7580 Qttname
= intern_c_string ("ttname");
7581 staticpro (&Qttname
);
7582 Qtpgid
= intern_c_string ("tpgid");
7583 staticpro (&Qtpgid
);
7584 Qminflt
= intern_c_string ("minflt");
7585 staticpro (&Qminflt
);
7586 Qmajflt
= intern_c_string ("majflt");
7587 staticpro (&Qmajflt
);
7588 Qcminflt
= intern_c_string ("cminflt");
7589 staticpro (&Qcminflt
);
7590 Qcmajflt
= intern_c_string ("cmajflt");
7591 staticpro (&Qcmajflt
);
7592 Qutime
= intern_c_string ("utime");
7593 staticpro (&Qutime
);
7594 Qstime
= intern_c_string ("stime");
7595 staticpro (&Qstime
);
7596 Qtime
= intern_c_string ("time");
7598 Qcutime
= intern_c_string ("cutime");
7599 staticpro (&Qcutime
);
7600 Qcstime
= intern_c_string ("cstime");
7601 staticpro (&Qcstime
);
7602 Qctime
= intern_c_string ("ctime");
7603 staticpro (&Qctime
);
7604 Qpri
= intern_c_string ("pri");
7606 Qnice
= intern_c_string ("nice");
7608 Qthcount
= intern_c_string ("thcount");
7609 staticpro (&Qthcount
);
7610 Qstart
= intern_c_string ("start");
7611 staticpro (&Qstart
);
7612 Qvsize
= intern_c_string ("vsize");
7613 staticpro (&Qvsize
);
7614 Qrss
= intern_c_string ("rss");
7616 Qetime
= intern_c_string ("etime");
7617 staticpro (&Qetime
);
7618 Qpcpu
= intern_c_string ("pcpu");
7620 Qpmem
= intern_c_string ("pmem");
7622 Qargs
= intern_c_string ("args");
7625 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
7626 doc
: /* *Non-nil means delete processes immediately when they exit.
7627 A value of nil means don't delete them until `list-processes' is run. */);
7629 delete_exited_processes
= 1;
7631 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
7632 doc
: /* Control type of device used to communicate with subprocesses.
7633 Values are nil to use a pipe, or t or `pty' to use a pty.
7634 The value has no effect if the system has no ptys or if all ptys are busy:
7635 then a pipe is used in any case.
7636 The value takes effect when `start-process' is called. */);
7637 Vprocess_connection_type
= Qt
;
7639 #ifdef ADAPTIVE_READ_BUFFERING
7640 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
7641 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7642 On some systems, when Emacs reads the output from a subprocess, the output data
7643 is read in very small blocks, potentially resulting in very poor performance.
7644 This behavior can be remedied to some extent by setting this variable to a
7645 non-nil value, as it will automatically delay reading from such processes, to
7646 allow them to produce more output before Emacs tries to read it.
7647 If the value is t, the delay is reset after each write to the process; any other
7648 non-nil value means that the delay is not reset on write.
7649 The variable takes effect when `start-process' is called. */);
7650 Vprocess_adaptive_read_buffering
= Qt
;
7653 defsubr (&Sprocessp
);
7654 defsubr (&Sget_process
);
7655 defsubr (&Sget_buffer_process
);
7656 defsubr (&Sdelete_process
);
7657 defsubr (&Sprocess_status
);
7658 defsubr (&Sprocess_exit_status
);
7659 defsubr (&Sprocess_id
);
7660 defsubr (&Sprocess_name
);
7661 defsubr (&Sprocess_tty_name
);
7662 defsubr (&Sprocess_command
);
7663 defsubr (&Sset_process_buffer
);
7664 defsubr (&Sprocess_buffer
);
7665 defsubr (&Sprocess_mark
);
7666 defsubr (&Sset_process_filter
);
7667 defsubr (&Sprocess_filter
);
7668 defsubr (&Sset_process_sentinel
);
7669 defsubr (&Sprocess_sentinel
);
7670 defsubr (&Sset_process_window_size
);
7671 defsubr (&Sset_process_inherit_coding_system_flag
);
7672 defsubr (&Sprocess_inherit_coding_system_flag
);
7673 defsubr (&Sset_process_query_on_exit_flag
);
7674 defsubr (&Sprocess_query_on_exit_flag
);
7675 defsubr (&Sprocess_contact
);
7676 defsubr (&Sprocess_plist
);
7677 defsubr (&Sset_process_plist
);
7678 defsubr (&Slist_processes
);
7679 defsubr (&Sprocess_list
);
7680 defsubr (&Sstart_process
);
7682 defsubr (&Sserial_process_configure
);
7683 defsubr (&Smake_serial_process
);
7684 #endif /* HAVE_SERIAL */
7686 defsubr (&Sset_network_process_option
);
7687 defsubr (&Smake_network_process
);
7688 defsubr (&Sformat_network_address
);
7689 #endif /* HAVE_SOCKETS */
7690 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
7692 defsubr (&Snetwork_interface_list
);
7694 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7695 defsubr (&Snetwork_interface_info
);
7697 #endif /* HAVE_SOCKETS ... */
7698 #ifdef DATAGRAM_SOCKETS
7699 defsubr (&Sprocess_datagram_address
);
7700 defsubr (&Sset_process_datagram_address
);
7702 defsubr (&Saccept_process_output
);
7703 defsubr (&Sprocess_send_region
);
7704 defsubr (&Sprocess_send_string
);
7705 defsubr (&Sinterrupt_process
);
7706 defsubr (&Skill_process
);
7707 defsubr (&Squit_process
);
7708 defsubr (&Sstop_process
);
7709 defsubr (&Scontinue_process
);
7710 defsubr (&Sprocess_running_child_p
);
7711 defsubr (&Sprocess_send_eof
);
7712 defsubr (&Ssignal_process
);
7713 defsubr (&Swaiting_for_user_input_p
);
7714 defsubr (&Sprocess_type
);
7715 defsubr (&Sset_process_coding_system
);
7716 defsubr (&Sprocess_coding_system
);
7717 defsubr (&Sset_process_filter_multibyte
);
7718 defsubr (&Sprocess_filter_multibyte_p
);
7719 defsubr (&Slist_system_processes
);
7720 defsubr (&Sprocess_attributes
);
7724 #else /* not subprocesses */
7726 #include <sys/types.h>
7728 #include <sys/stat.h>
7732 #ifdef HAVE_UNISTD_H
7737 #include "systime.h"
7738 #include "character.h"
7740 #include "termopts.h"
7741 #include "sysselect.h"
7743 extern int frame_garbaged
;
7745 extern EMACS_TIME
timer_check ();
7746 extern int timers_run
;
7748 Lisp_Object QCtype
, QCname
;
7750 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
7751 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
7752 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
7753 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
7755 /* As described above, except assuming that there are no subprocesses:
7757 Wait for timeout to elapse and/or keyboard input to be available.
7760 timeout in seconds, or
7761 zero for no limit, or
7762 -1 means gobble data immediately available but don't wait for any.
7764 read_kbd is a Lisp_Object:
7765 0 to ignore keyboard input, or
7766 1 to return when input is available, or
7767 -1 means caller will actually read the input, so don't throw to
7770 see full version for other parameters. We know that wait_proc will
7771 always be NULL, since `subprocesses' isn't defined.
7773 do_display != 0 means redisplay should be done to show subprocess
7774 output that arrives.
7776 Return true if we received input from any process. */
7779 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
7780 wait_for_cell
, wait_proc
, just_wait_proc
)
7781 int time_limit
, microsecs
, read_kbd
, do_display
;
7782 Lisp_Object wait_for_cell
;
7783 struct Lisp_Process
*wait_proc
;
7787 EMACS_TIME end_time
, timeout
;
7788 SELECT_TYPE waitchannels
;
7791 /* What does time_limit really mean? */
7792 if (time_limit
|| microsecs
)
7794 EMACS_GET_TIME (end_time
);
7795 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
7796 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
7799 /* Turn off periodic alarms (in case they are in use)
7800 and then turn off any other atimers,
7801 because the select emulator uses alarms. */
7803 turn_on_atimers (0);
7807 int timeout_reduced_for_timers
= 0;
7809 /* If calling from keyboard input, do not quit
7810 since we want to return C-g as an input character.
7811 Otherwise, do pending quit if requested. */
7815 /* Exit now if the cell we're waiting for became non-nil. */
7816 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7819 /* Compute time from now till when time limit is up */
7820 /* Exit if already run out */
7821 if (time_limit
== -1)
7823 /* -1 specified for timeout means
7824 gobble output available now
7825 but don't wait at all. */
7827 EMACS_SET_SECS_USECS (timeout
, 0, 0);
7829 else if (time_limit
|| microsecs
)
7831 EMACS_GET_TIME (timeout
);
7832 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
7833 if (EMACS_TIME_NEG_P (timeout
))
7838 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7841 /* If our caller will not immediately handle keyboard events,
7842 run timer events directly.
7843 (Callers that will immediately read keyboard events
7844 call timer_delay on their own.) */
7845 if (NILP (wait_for_cell
))
7847 EMACS_TIME timer_delay
;
7851 int old_timers_run
= timers_run
;
7852 timer_delay
= timer_check (1);
7853 if (timers_run
!= old_timers_run
&& do_display
)
7854 /* We must retry, since a timer may have requeued itself
7855 and that could alter the time delay. */
7856 redisplay_preserve_echo_area (14);
7860 while (!detect_input_pending ());
7862 /* If there is unread keyboard input, also return. */
7864 && requeued_events_pending_p ())
7867 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7869 EMACS_TIME difference
;
7870 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7871 if (EMACS_TIME_NEG_P (difference
))
7873 timeout
= timer_delay
;
7874 timeout_reduced_for_timers
= 1;
7879 /* Cause C-g and alarm signals to take immediate action,
7880 and cause input available signals to zero out timeout. */
7882 set_waiting_for_input (&timeout
);
7884 /* Wait till there is something to do. */
7886 if (! read_kbd
&& NILP (wait_for_cell
))
7887 FD_ZERO (&waitchannels
);
7889 FD_SET (0, &waitchannels
);
7891 /* If a frame has been newly mapped and needs updating,
7892 reprocess its display stuff. */
7893 if (frame_garbaged
&& do_display
)
7895 clear_waiting_for_input ();
7896 redisplay_preserve_echo_area (15);
7898 set_waiting_for_input (&timeout
);
7901 if (read_kbd
&& detect_input_pending ())
7904 FD_ZERO (&waitchannels
);
7907 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7912 /* Make C-g and alarm signals set flags again */
7913 clear_waiting_for_input ();
7915 /* If we woke up due to SIGWINCH, actually change size now. */
7916 do_pending_window_change (0);
7918 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7919 /* We waited the full specified time, so return now. */
7924 /* If the system call was interrupted, then go around the
7926 if (xerrno
== EINTR
)
7927 FD_ZERO (&waitchannels
);
7929 error ("select error: %s", emacs_strerror (xerrno
));
7932 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7933 /* System sometimes fails to deliver SIGIO. */
7934 kill (getpid (), SIGIO
);
7937 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7938 kill (getpid (), SIGIO
);
7941 /* Check for keyboard input */
7944 && detect_input_pending_run_timers (do_display
))
7946 swallow_events (do_display
);
7947 if (detect_input_pending_run_timers (do_display
))
7951 /* If there is unread keyboard input, also return. */
7953 && requeued_events_pending_p ())
7956 /* If wait_for_cell. check for keyboard input
7957 but don't run any timers.
7958 ??? (It seems wrong to me to check for keyboard
7959 input at all when wait_for_cell, but the code
7960 has been this way since July 1994.
7961 Try changing this after version 19.31.) */
7962 if (! NILP (wait_for_cell
)
7963 && detect_input_pending ())
7965 swallow_events (do_display
);
7966 if (detect_input_pending ())
7970 /* Exit now if the cell we're waiting for became non-nil. */
7971 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7981 /* Don't confuse make-docfile by having two doc strings for this function.
7982 make-docfile does not pay attention to #if, for good reason! */
7983 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7986 register Lisp_Object name
;
7991 /* Don't confuse make-docfile by having two doc strings for this function.
7992 make-docfile does not pay attention to #if, for good reason! */
7993 DEFUN ("process-inherit-coding-system-flag",
7994 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7998 register Lisp_Object process
;
8000 /* Ignore the argument and return the value of
8001 inherit-process-coding-system. */
8002 return inherit_process_coding_system
? Qt
: Qnil
;
8005 /* Kill all processes associated with `buffer'.
8006 If `buffer' is nil, kill all processes.
8007 Since we have no subprocesses, this does nothing. */
8010 kill_buffer_processes (buffer
)
8015 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
8017 doc
: /* Return a list of numerical process IDs of all running processes.
8018 If this functionality is unsupported, return nil.
8020 See `process-attributes' for getting attributes of a process given its ID. */)
8023 return list_system_processes ();
8026 DEFUN ("process-attributes", Fprocess_attributes
,
8027 Sprocess_attributes
, 1, 1, 0,
8028 doc
: /* Return attributes of the process given by its PID, a number.
8030 Value is an alist where each element is a cons cell of the form
8034 If this functionality is unsupported, the value is nil.
8036 See `list-system-processes' for getting a list of all process IDs.
8038 The KEYs of the attributes that this function may return are listed
8039 below, together with the type of the associated VALUE (in parentheses).
8040 Not all platforms support all of these attributes; unsupported
8041 attributes will not appear in the returned alist.
8042 Unless explicitly indicated otherwise, numbers can have either
8043 integer or floating point values.
8045 euid -- Effective user User ID of the process (number)
8046 user -- User name corresponding to euid (string)
8047 egid -- Effective user Group ID of the process (number)
8048 group -- Group name corresponding to egid (string)
8049 comm -- Command name (executable name only) (string)
8050 state -- Process state code, such as "S", "R", or "T" (string)
8051 ppid -- Parent process ID (number)
8052 pgrp -- Process group ID (number)
8053 sess -- Session ID, i.e. process ID of session leader (number)
8054 ttname -- Controlling tty name (string)
8055 tpgid -- ID of foreground process group on the process's tty (number)
8056 minflt -- number of minor page faults (number)
8057 majflt -- number of major page faults (number)
8058 cminflt -- cumulative number of minor page faults (number)
8059 cmajflt -- cumulative number of major page faults (number)
8060 utime -- user time used by the process, in the (HIGH LOW USEC) format
8061 stime -- system time used by the process, in the (HIGH LOW USEC) format
8062 time -- sum of utime and stime, in the (HIGH LOW USEC) format
8063 cutime -- user time used by the process and its children, (HIGH LOW USEC)
8064 cstime -- system time used by the process and its children, (HIGH LOW USEC)
8065 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
8066 pri -- priority of the process (number)
8067 nice -- nice value of the process (number)
8068 thcount -- process thread count (number)
8069 start -- time the process started, in the (HIGH LOW USEC) format
8070 vsize -- virtual memory size of the process in KB's (number)
8071 rss -- resident set size of the process in KB's (number)
8072 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
8073 pcpu -- percents of CPU time used by the process (floating-point number)
8074 pmem -- percents of total physical memory used by process's resident set
8075 (floating-point number)
8076 args -- command line which invoked the process (string). */)
8081 return system_process_attributes (pid
);
8093 QCtype
= intern_c_string (":type");
8094 staticpro (&QCtype
);
8095 QCname
= intern_c_string (":name");
8096 staticpro (&QCname
);
8097 QCtype
= intern_c_string (":type");
8098 staticpro (&QCtype
);
8099 QCname
= intern_c_string (":name");
8100 staticpro (&QCname
);
8101 Qeuid
= intern_c_string ("euid");
8103 Qegid
= intern_c_string ("egid");
8105 Quser
= intern_c_string ("user");
8107 Qgroup
= intern_c_string ("group");
8108 staticpro (&Qgroup
);
8109 Qcomm
= intern_c_string ("comm");
8111 Qstate
= intern_c_string ("state");
8112 staticpro (&Qstate
);
8113 Qppid
= intern_c_string ("ppid");
8115 Qpgrp
= intern_c_string ("pgrp");
8117 Qsess
= intern_c_string ("sess");
8119 Qttname
= intern_c_string ("ttname");
8120 staticpro (&Qttname
);
8121 Qtpgid
= intern_c_string ("tpgid");
8122 staticpro (&Qtpgid
);
8123 Qminflt
= intern_c_string ("minflt");
8124 staticpro (&Qminflt
);
8125 Qmajflt
= intern_c_string ("majflt");
8126 staticpro (&Qmajflt
);
8127 Qcminflt
= intern_c_string ("cminflt");
8128 staticpro (&Qcminflt
);
8129 Qcmajflt
= intern_c_string ("cmajflt");
8130 staticpro (&Qcmajflt
);
8131 Qutime
= intern_c_string ("utime");
8132 staticpro (&Qutime
);
8133 Qstime
= intern_c_string ("stime");
8134 staticpro (&Qstime
);
8135 Qtime
= intern_c_string ("time");
8137 Qcutime
= intern_c_string ("cutime");
8138 staticpro (&Qcutime
);
8139 Qcstime
= intern_c_string ("cstime");
8140 staticpro (&Qcstime
);
8141 Qctime
= intern_c_string ("ctime");
8142 staticpro (&Qctime
);
8143 Qpri
= intern_c_string ("pri");
8145 Qnice
= intern_c_string ("nice");
8147 Qthcount
= intern_c_string ("thcount");
8148 staticpro (&Qthcount
);
8149 Qstart
= intern_c_string ("start");
8150 staticpro (&Qstart
);
8151 Qvsize
= intern_c_string ("vsize");
8152 staticpro (&Qvsize
);
8153 Qrss
= intern_c_string ("rss");
8155 Qetime
= intern_c_string ("etime");
8156 staticpro (&Qetime
);
8157 Qpcpu
= intern_c_string ("pcpu");
8159 Qpmem
= intern_c_string ("pmem");
8161 Qargs
= intern_c_string ("args");
8164 defsubr (&Sget_buffer_process
);
8165 defsubr (&Sprocess_inherit_coding_system_flag
);
8166 defsubr (&Slist_system_processes
);
8167 defsubr (&Sprocess_attributes
);
8171 #endif /* not subprocesses */
8173 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
8174 (do not change this comment) */