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 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, or (at your option)
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; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
43 #ifdef HAVE_INTTYPES_H
50 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
53 #endif /* not WINDOWSNT */
55 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
56 #include <sys/socket.h>
58 #include <netinet/in.h>
59 #include <arpa/inet.h>
60 #ifdef NEED_NET_ERRNO_H
61 #include <net/errno.h>
62 #endif /* NEED_NET_ERRNO_H */
64 /* Are local (unix) sockets supported? */
65 #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
66 #if !defined (AF_LOCAL) && defined (AF_UNIX)
67 #define AF_LOCAL AF_UNIX
70 #define HAVE_LOCAL_SOCKETS
74 #endif /* HAVE_SOCKETS */
76 /* TERM is a poor-man's SLIP, used on GNU/Linux. */
81 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
82 #ifdef HAVE_BROKEN_INET_ADDR
83 #define IN_ADDR struct in_addr
84 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
86 #define IN_ADDR unsigned long
87 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
90 #if defined(BSD_SYSTEM) || defined(STRIDE)
91 #include <sys/ioctl.h>
92 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
94 #endif /* HAVE_PTYS and no O_NDELAY */
95 #endif /* BSD_SYSTEM || STRIDE */
97 #ifdef BROKEN_O_NONBLOCK
99 #endif /* BROKEN_O_NONBLOCK */
105 /* Can we use SIOCGIFCONF and/or SIOCGIFADDR */
107 #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H)
108 /* sys/ioctl.h may have been included already */
110 #include <sys/ioctl.h>
117 #include <sys/sysmacros.h> /* for "minor" */
118 #endif /* not IRIS */
121 #include <sys/wait.h>
125 #include <netinet/in.h>
126 #include <arpa/nameser.h>
140 #include "termhooks.h"
141 #include "termopts.h"
142 #include "commands.h"
143 #include "keyboard.h"
144 #include "blockinput.h"
145 #include "dispextern.h"
146 #include "composite.h"
149 Lisp_Object Qprocessp
;
150 Lisp_Object Qrun
, Qstop
, Qsignal
;
151 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
152 Lisp_Object Qlocal
, Qipv4
, Qdatagram
;
156 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
157 Lisp_Object QClocal
, QCremote
, QCcoding
;
158 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
159 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
160 Lisp_Object QCfilter_multibyte
;
161 Lisp_Object Qlast_nonmenu_event
;
162 /* QCfamily is declared and initialized in xfaces.c,
163 QCfilter in keyboard.c. */
164 extern Lisp_Object QCfamily
, QCfilter
;
166 /* Qexit is declared and initialized in eval.c. */
168 /* QCfamily is defined in xfaces.c. */
169 extern Lisp_Object QCfamily
;
170 /* QCfilter is defined in keyboard.c. */
171 extern Lisp_Object QCfilter
;
173 /* a process object is a network connection when its childp field is neither
174 Qt nor Qnil but is instead a property list (KEY VAL ...). */
177 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
178 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
180 #define NETCONN_P(p) 0
181 #define NETCONN1_P(p) 0
182 #endif /* HAVE_SOCKETS */
184 /* Define first descriptor number available for subprocesses. */
186 #define FIRST_PROC_DESC 1
188 #define FIRST_PROC_DESC 3
191 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
194 #if !defined (SIGCHLD) && defined (SIGCLD)
195 #define SIGCHLD SIGCLD
198 #include "syssignal.h"
202 extern char *get_operating_system_release ();
208 extern char *sys_errlist
[];
215 /* t means use pty, nil means use a pipe,
216 maybe other values to come. */
217 static Lisp_Object Vprocess_connection_type
;
221 #include <sys/socket.h>
225 /* These next two vars are non-static since sysdep.c uses them in the
226 emulation of `select'. */
227 /* Number of events of change of status of a process. */
229 /* Number of events for which the user or sentinel has been notified. */
232 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
234 #ifdef BROKEN_NON_BLOCKING_CONNECT
235 #undef NON_BLOCKING_CONNECT
237 #ifndef NON_BLOCKING_CONNECT
240 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
241 #if defined (O_NONBLOCK) || defined (O_NDELAY)
242 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
243 #define NON_BLOCKING_CONNECT
244 #endif /* EWOULDBLOCK || EINPROGRESS */
245 #endif /* O_NONBLOCK || O_NDELAY */
246 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
247 #endif /* HAVE_SELECT */
248 #endif /* HAVE_SOCKETS */
249 #endif /* NON_BLOCKING_CONNECT */
250 #endif /* BROKEN_NON_BLOCKING_CONNECT */
252 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
253 this system. We need to read full packets, so we need a
254 "non-destructive" select. So we require either native select,
255 or emulation of select using FIONREAD. */
257 #ifdef BROKEN_DATAGRAM_SOCKETS
258 #undef DATAGRAM_SOCKETS
260 #ifndef DATAGRAM_SOCKETS
262 #if defined (HAVE_SELECT) || defined (FIONREAD)
263 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
264 #define DATAGRAM_SOCKETS
265 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
266 #endif /* HAVE_SELECT || FIONREAD */
267 #endif /* HAVE_SOCKETS */
268 #endif /* DATAGRAM_SOCKETS */
269 #endif /* BROKEN_DATAGRAM_SOCKETS */
272 #undef NON_BLOCKING_CONNECT
273 #undef DATAGRAM_SOCKETS
276 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
277 #ifdef EMACS_HAS_USECS
278 #define ADAPTIVE_READ_BUFFERING
282 #ifdef ADAPTIVE_READ_BUFFERING
283 #define READ_OUTPUT_DELAY_INCREMENT 10000
284 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
285 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
287 /* Number of processes which have a non-zero read_output_delay,
288 and therefore might be delayed for adaptive read buffering. */
290 static int process_output_delay_count
;
292 /* Non-zero if any process has non-nil read_output_skip. */
294 static int process_output_skip
;
296 /* Non-nil means to delay reading process output to improve buffering.
297 A value of t means that delay is reset after each send, any other
298 non-nil value does not reset the delay. A value of nil disables
299 adaptive read buffering completely. */
300 static Lisp_Object Vprocess_adaptive_read_buffering
;
302 #define process_output_delay_count 0
306 #include "sysselect.h"
308 static int keyboard_bit_set
P_ ((SELECT_TYPE
*));
309 static void deactivate_process
P_ ((Lisp_Object
));
310 static void status_notify
P_ ((struct Lisp_Process
*));
311 static int read_process_output
P_ ((Lisp_Object
, int));
313 /* If we support a window system, turn on the code to poll periodically
314 to detect C-g. It isn't actually used when doing interrupt input. */
315 #ifdef HAVE_WINDOW_SYSTEM
316 #define POLL_FOR_INPUT
319 static Lisp_Object
get_process ();
320 static void exec_sentinel ();
322 extern EMACS_TIME
timer_check ();
323 extern int timers_run
;
325 /* Mask of bits indicating the descriptors that we wait for input on. */
327 static SELECT_TYPE input_wait_mask
;
329 /* Mask that excludes keyboard input descriptor(s). */
331 static SELECT_TYPE non_keyboard_wait_mask
;
333 /* Mask that excludes process input descriptor(s). */
335 static SELECT_TYPE non_process_wait_mask
;
337 /* Mask for the gpm mouse input descriptor. */
339 static SELECT_TYPE gpm_wait_mask
;
341 #ifdef NON_BLOCKING_CONNECT
342 /* Mask of bits indicating the descriptors that we wait for connect to
343 complete on. Once they complete, they are removed from this mask
344 and added to the input_wait_mask and non_keyboard_wait_mask. */
346 static SELECT_TYPE connect_wait_mask
;
348 /* Number of bits set in connect_wait_mask. */
349 static int num_pending_connects
;
351 #define IF_NON_BLOCKING_CONNECT(s) s
353 #define IF_NON_BLOCKING_CONNECT(s)
356 /* The largest descriptor currently in use for a process object. */
357 static int max_process_desc
;
359 /* The largest descriptor currently in use for keyboard input. */
360 static int max_keyboard_desc
;
362 /* The largest descriptor currently in use for gpm mouse input. */
363 static int max_gpm_desc
;
365 /* Nonzero means delete a process right away if it exits. */
366 static int delete_exited_processes
;
368 /* Indexed by descriptor, gives the process (if any) for that descriptor */
369 Lisp_Object chan_process
[MAXDESC
];
371 /* Alist of elements (NAME . PROCESS) */
372 Lisp_Object Vprocess_alist
;
374 /* Buffered-ahead input char from process, indexed by channel.
375 -1 means empty (no char is buffered).
376 Used on sys V where the only way to tell if there is any
377 output from the process is to read at least one char.
378 Always -1 on systems that support FIONREAD. */
380 /* Don't make static; need to access externally. */
381 int proc_buffered_char
[MAXDESC
];
383 /* Table of `struct coding-system' for each process. */
384 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
385 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
387 #ifdef DATAGRAM_SOCKETS
388 /* Table of `partner address' for datagram sockets. */
389 struct sockaddr_and_len
{
392 } datagram_address
[MAXDESC
];
393 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
394 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
396 #define DATAGRAM_CHAN_P(chan) (0)
397 #define DATAGRAM_CONN_P(proc) (0)
400 /* Maximum number of bytes to send to a pty without an eof. */
401 static int pty_max_bytes
;
403 /* Nonzero means don't run process sentinels. This is used
405 int inhibit_sentinels
;
411 /* The file name of the pty opened by allocate_pty. */
413 static char pty_name
[24];
416 /* Compute the Lisp form of the process status, p->status, from
417 the numeric status that was returned by `wait'. */
419 static Lisp_Object
status_convert ();
423 struct Lisp_Process
*p
;
425 union { int i
; WAITTYPE wt
; } u
;
426 eassert (p
->raw_status_new
);
428 p
->status
= status_convert (u
.wt
);
429 p
->raw_status_new
= 0;
432 /* Convert a process status word in Unix format to
433 the list that we use internally. */
440 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
441 else if (WIFEXITED (w
))
442 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
443 WCOREDUMP (w
) ? Qt
: Qnil
));
444 else if (WIFSIGNALED (w
))
445 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
446 WCOREDUMP (w
) ? Qt
: Qnil
));
451 /* Given a status-list, extract the three pieces of information
452 and store them individually through the three pointers. */
455 decode_status (l
, symbol
, code
, coredump
)
473 *code
= XFASTINT (XCAR (tem
));
475 *coredump
= !NILP (tem
);
479 /* Return a string describing a process status list. */
483 struct Lisp_Process
*p
;
485 Lisp_Object status
= p
->status
;
488 Lisp_Object string
, string2
;
490 decode_status (status
, &symbol
, &code
, &coredump
);
492 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
495 synchronize_system_messages_locale ();
496 signame
= strsignal (code
);
499 string
= build_string (signame
);
500 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
501 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
502 return concat2 (string
, string2
);
504 else if (EQ (symbol
, Qexit
))
507 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
509 return build_string ("finished\n");
510 string
= Fnumber_to_string (make_number (code
));
511 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
512 return concat3 (build_string ("exited abnormally with code "),
515 else if (EQ (symbol
, Qfailed
))
517 string
= Fnumber_to_string (make_number (code
));
518 string2
= build_string ("\n");
519 return concat3 (build_string ("failed with code "),
523 return Fcopy_sequence (Fsymbol_name (symbol
));
528 /* Open an available pty, returning a file descriptor.
529 Return -1 on failure.
530 The file name of the terminal corresponding to the pty
531 is left in the variable pty_name. */
542 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
543 for (i
= 0; i
< 16; i
++)
546 struct stat stb
; /* Used in some PTY_OPEN. */
547 #ifdef PTY_NAME_SPRINTF
550 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
551 #endif /* no PTY_NAME_SPRINTF */
555 #else /* no PTY_OPEN */
558 /* Unusual IRIS code */
559 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
562 if (fstat (fd
, &stb
) < 0)
564 # else /* not IRIS */
565 { /* Some systems name their pseudoterminals so that there are gaps in
566 the usual sequence - for example, on HP9000/S700 systems, there
567 are no pseudoterminals with names ending in 'f'. So we wait for
568 three failures in a row before deciding that we've reached the
570 int failed_count
= 0;
572 if (stat (pty_name
, &stb
) < 0)
575 if (failed_count
>= 3)
582 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
584 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
586 # endif /* not IRIS */
588 #endif /* no PTY_OPEN */
592 /* check to make certain that both sides are available
593 this avoids a nasty yet stupid bug in rlogins */
594 #ifdef PTY_TTY_NAME_SPRINTF
597 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
598 #endif /* no PTY_TTY_NAME_SPRINTF */
600 if (access (pty_name
, 6) != 0)
603 # if !defined(IRIS) && !defined(__sgi)
609 #endif /* not UNIPLUS */
616 #endif /* HAVE_PTYS */
622 register Lisp_Object val
, tem
, name1
;
623 register struct Lisp_Process
*p
;
627 p
= allocate_process ();
634 p
->raw_status_new
= 0;
636 p
->mark
= Fmake_marker ();
638 #ifdef ADAPTIVE_READ_BUFFERING
639 p
->adaptive_read_buffering
= 0;
640 p
->read_output_delay
= 0;
641 p
->read_output_skip
= 0;
644 /* If name is already in use, modify it until it is unused. */
649 tem
= Fget_process (name1
);
650 if (NILP (tem
)) break;
651 sprintf (suffix
, "<%d>", i
);
652 name1
= concat2 (name
, build_string (suffix
));
656 XSETPROCESS (val
, p
);
657 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
662 remove_process (proc
)
663 register Lisp_Object proc
;
665 register Lisp_Object pair
;
667 pair
= Frassq (proc
, Vprocess_alist
);
668 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
670 deactivate_process (proc
);
673 /* Setup coding systems of PROCESS. */
676 setup_process_coding_systems (process
)
679 struct Lisp_Process
*p
= XPROCESS (process
);
681 int outch
= p
->outfd
;
683 if (inch
< 0 || outch
< 0)
686 if (!proc_decode_coding_system
[inch
])
687 proc_decode_coding_system
[inch
]
688 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
689 setup_coding_system (p
->decode_coding_system
,
690 proc_decode_coding_system
[inch
]);
691 if (! NILP (p
->filter
))
693 if (!p
->filter_multibyte
)
694 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
696 else if (BUFFERP (p
->buffer
))
698 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
699 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
702 if (!proc_encode_coding_system
[outch
])
703 proc_encode_coding_system
[outch
]
704 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
705 setup_coding_system (p
->encode_coding_system
,
706 proc_encode_coding_system
[outch
]);
707 if (proc_encode_coding_system
[outch
]->eol_type
== CODING_EOL_UNDECIDED
)
708 proc_encode_coding_system
[outch
]->eol_type
= system_eol_type
;
711 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
712 doc
: /* Return t if OBJECT is a process. */)
716 return PROCESSP (object
) ? Qt
: Qnil
;
719 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
720 doc
: /* Return the process named NAME, or nil if there is none. */)
722 register Lisp_Object name
;
727 return Fcdr (Fassoc (name
, Vprocess_alist
));
730 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
731 doc
: /* Return the (or a) process associated with BUFFER.
732 BUFFER may be a buffer or the name of one. */)
734 register Lisp_Object buffer
;
736 register Lisp_Object buf
, tail
, proc
;
738 if (NILP (buffer
)) return Qnil
;
739 buf
= Fget_buffer (buffer
);
740 if (NILP (buf
)) return Qnil
;
742 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
744 proc
= Fcdr (XCAR (tail
));
745 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
751 /* This is how commands for the user decode process arguments. It
752 accepts a process, a process name, a buffer, a buffer name, or nil.
753 Buffers denote the first process in the buffer, and nil denotes the
758 register Lisp_Object name
;
760 register Lisp_Object proc
, obj
;
763 obj
= Fget_process (name
);
765 obj
= Fget_buffer (name
);
767 error ("Process %s does not exist", SDATA (name
));
769 else if (NILP (name
))
770 obj
= Fcurrent_buffer ();
774 /* Now obj should be either a buffer object or a process object.
778 proc
= Fget_buffer_process (obj
);
780 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
792 /* Fdelete_process promises to immediately forget about the process, but in
793 reality, Emacs needs to remember those processes until they have been
794 treated by sigchld_handler; otherwise this handler would consider the
795 process as being synchronous and say that the synchronous process is
797 static Lisp_Object deleted_pid_list
;
800 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
801 doc
: /* Delete PROCESS: kill it and forget about it immediately.
802 PROCESS may be a process, a buffer, the name of a process or buffer, or
803 nil, indicating the current buffer's process. */)
805 register Lisp_Object process
;
807 register struct Lisp_Process
*p
;
809 process
= get_process (process
);
810 p
= XPROCESS (process
);
812 p
->raw_status_new
= 0;
815 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
816 p
->tick
= ++process_tick
;
819 else if (p
->infd
>= 0)
823 /* Assignment to EMACS_INT stops GCC whining about limited range
825 EMACS_INT pid
= p
->pid
;
827 /* No problem storing the pid here, as it is still in Vprocess_alist. */
828 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
829 /* GC treated elements set to nil. */
830 Fdelq (Qnil
, deleted_pid_list
));
831 /* If the process has already signaled, remove it from the list. */
832 if (p
->raw_status_new
)
835 if (CONSP (p
->status
))
836 symbol
= XCAR (p
->status
);
837 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
839 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
843 Fkill_process (process
, Qnil
);
844 /* Do this now, since remove_process will make sigchld_handler do nothing. */
846 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
847 p
->tick
= ++process_tick
;
851 remove_process (process
);
855 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
856 doc
: /* Return the status of PROCESS.
857 The returned value is one of the following symbols:
858 run -- for a process that is running.
859 stop -- for a process stopped but continuable.
860 exit -- for a process that has exited.
861 signal -- for a process that has got a fatal signal.
862 open -- for a network stream connection that is open.
863 listen -- for a network stream server that is listening.
864 closed -- for a network stream connection that is closed.
865 connect -- when waiting for a non-blocking connection to complete.
866 failed -- when a non-blocking connection has failed.
867 nil -- if arg is a process name and no such process exists.
868 PROCESS may be a process, a buffer, the name of a process, or
869 nil, indicating the current buffer's process. */)
871 register Lisp_Object process
;
873 register struct Lisp_Process
*p
;
874 register Lisp_Object status
;
876 if (STRINGP (process
))
877 process
= Fget_process (process
);
879 process
= get_process (process
);
884 p
= XPROCESS (process
);
885 if (p
->raw_status_new
)
889 status
= XCAR (status
);
892 if (EQ (status
, Qexit
))
894 else if (EQ (p
->command
, Qt
))
896 else if (EQ (status
, Qrun
))
902 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
904 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
905 If PROCESS has not yet exited or died, return 0. */)
907 register Lisp_Object process
;
909 CHECK_PROCESS (process
);
910 if (XPROCESS (process
)->raw_status_new
)
911 update_status (XPROCESS (process
));
912 if (CONSP (XPROCESS (process
)->status
))
913 return XCAR (XCDR (XPROCESS (process
)->status
));
914 return make_number (0);
917 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
918 doc
: /* Return the process id of PROCESS.
919 This is the pid of the external process which PROCESS uses or talks to.
920 For a network connection, this value is nil. */)
922 register Lisp_Object process
;
924 /* Assignment to EMACS_INT stops GCC whining about limited range of
928 CHECK_PROCESS (process
);
929 pid
= XPROCESS (process
)->pid
;
930 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
933 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
934 doc
: /* Return the name of PROCESS, as a string.
935 This is the name of the program invoked in PROCESS,
936 possibly modified to make it unique among process names. */)
938 register Lisp_Object process
;
940 CHECK_PROCESS (process
);
941 return XPROCESS (process
)->name
;
944 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
945 doc
: /* Return the command that was executed to start PROCESS.
946 This is a list of strings, the first string being the program executed
947 and the rest of the strings being the arguments given to it.
948 For a non-child channel, this is nil. */)
950 register Lisp_Object process
;
952 CHECK_PROCESS (process
);
953 return XPROCESS (process
)->command
;
956 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
957 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
958 This is the terminal that the process itself reads and writes on,
959 not the name of the pty that Emacs uses to talk with that terminal. */)
961 register Lisp_Object process
;
963 CHECK_PROCESS (process
);
964 return XPROCESS (process
)->tty_name
;
967 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
969 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
971 register Lisp_Object process
, buffer
;
973 struct Lisp_Process
*p
;
975 CHECK_PROCESS (process
);
977 CHECK_BUFFER (buffer
);
978 p
= XPROCESS (process
);
981 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
982 setup_process_coding_systems (process
);
986 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
988 doc
: /* Return the buffer PROCESS is associated with.
989 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
991 register Lisp_Object process
;
993 CHECK_PROCESS (process
);
994 return XPROCESS (process
)->buffer
;
997 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
999 doc
: /* Return the marker for the end of the last output from PROCESS. */)
1001 register Lisp_Object process
;
1003 CHECK_PROCESS (process
);
1004 return XPROCESS (process
)->mark
;
1007 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1009 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1010 A value of t means stop accepting output from the process.
1012 When a process has a filter, its buffer is not used for output.
1013 Instead, each time it does output, the entire string of output is
1014 passed to the filter.
1016 The filter gets two arguments: the process and the string of output.
1017 The string argument is normally a multibyte string, except:
1018 - if the process' input coding system is no-conversion or raw-text,
1019 it is a unibyte string (the non-converted input), or else
1020 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1021 string (the result of converting the decoded input multibyte
1022 string to unibyte with `string-make-unibyte'). */)
1024 register Lisp_Object process
, filter
;
1026 struct Lisp_Process
*p
;
1028 CHECK_PROCESS (process
);
1029 p
= XPROCESS (process
);
1031 /* Don't signal an error if the process' input file descriptor
1032 is closed. This could make debugging Lisp more difficult,
1033 for example when doing something like
1035 (setq process (start-process ...))
1037 (set-process-filter process ...) */
1041 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1043 FD_CLR (p
->infd
, &input_wait_mask
);
1044 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1046 else if (EQ (p
->filter
, Qt
)
1047 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
1049 FD_SET (p
->infd
, &input_wait_mask
);
1050 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1056 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1057 setup_process_coding_systems (process
);
1061 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1063 doc
: /* Returns the filter function of PROCESS; nil if none.
1064 See `set-process-filter' for more info on filter functions. */)
1066 register Lisp_Object process
;
1068 CHECK_PROCESS (process
);
1069 return XPROCESS (process
)->filter
;
1072 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1074 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1075 The sentinel is called as a function when the process changes state.
1076 It gets two arguments: the process, and a string describing the change. */)
1078 register Lisp_Object process
, sentinel
;
1080 struct Lisp_Process
*p
;
1082 CHECK_PROCESS (process
);
1083 p
= XPROCESS (process
);
1085 p
->sentinel
= sentinel
;
1087 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1091 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1093 doc
: /* Return the sentinel of PROCESS; nil if none.
1094 See `set-process-sentinel' for more info on sentinels. */)
1096 register Lisp_Object process
;
1098 CHECK_PROCESS (process
);
1099 return XPROCESS (process
)->sentinel
;
1102 DEFUN ("set-process-window-size", Fset_process_window_size
,
1103 Sset_process_window_size
, 3, 3, 0,
1104 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1105 (process
, height
, width
)
1106 register Lisp_Object process
, height
, width
;
1108 CHECK_PROCESS (process
);
1109 CHECK_NATNUM (height
);
1110 CHECK_NATNUM (width
);
1112 if (XPROCESS (process
)->infd
< 0
1113 || set_window_size (XPROCESS (process
)->infd
,
1114 XINT (height
), XINT (width
)) <= 0)
1120 DEFUN ("set-process-inherit-coding-system-flag",
1121 Fset_process_inherit_coding_system_flag
,
1122 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1123 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1124 If the second argument FLAG is non-nil, then the variable
1125 `buffer-file-coding-system' of the buffer associated with PROCESS
1126 will be bound to the value of the coding system used to decode
1129 This is useful when the coding system specified for the process buffer
1130 leaves either the character code conversion or the end-of-line conversion
1131 unspecified, or if the coding system used to decode the process output
1132 is more appropriate for saving the process buffer.
1134 Binding the variable `inherit-process-coding-system' to non-nil before
1135 starting the process is an alternative way of setting the inherit flag
1136 for the process which will run. */)
1138 register Lisp_Object process
, flag
;
1140 CHECK_PROCESS (process
);
1141 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1145 DEFUN ("process-inherit-coding-system-flag",
1146 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1148 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1149 If this flag is t, `buffer-file-coding-system' of the buffer
1150 associated with PROCESS will inherit the coding system used to decode
1151 the process output. */)
1153 register Lisp_Object process
;
1155 CHECK_PROCESS (process
);
1156 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
1159 DEFUN ("set-process-query-on-exit-flag",
1160 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1162 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1163 If the second argument FLAG is non-nil, Emacs will query the user before
1164 exiting if PROCESS is running. */)
1166 register Lisp_Object process
, flag
;
1168 CHECK_PROCESS (process
);
1169 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1173 DEFUN ("process-query-on-exit-flag",
1174 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1176 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1178 register Lisp_Object process
;
1180 CHECK_PROCESS (process
);
1181 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1184 #ifdef DATAGRAM_SOCKETS
1185 Lisp_Object
Fprocess_datagram_address ();
1188 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1190 doc
: /* Return the contact info of PROCESS; t for a real child.
1191 For a net connection, the value depends on the optional KEY arg.
1192 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1193 if KEY is t, the complete contact information for the connection is
1194 returned, else the specific value for the keyword KEY is returned.
1195 See `make-network-process' for a list of keywords. */)
1197 register Lisp_Object process
, key
;
1199 Lisp_Object contact
;
1201 CHECK_PROCESS (process
);
1202 contact
= XPROCESS (process
)->childp
;
1204 #ifdef DATAGRAM_SOCKETS
1205 if (DATAGRAM_CONN_P (process
)
1206 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1207 contact
= Fplist_put (contact
, QCremote
,
1208 Fprocess_datagram_address (process
));
1211 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1214 return Fcons (Fplist_get (contact
, QChost
),
1215 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1216 return Fplist_get (contact
, key
);
1219 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1221 doc
: /* Return the plist of PROCESS. */)
1223 register Lisp_Object process
;
1225 CHECK_PROCESS (process
);
1226 return XPROCESS (process
)->plist
;
1229 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1231 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1233 register Lisp_Object process
, plist
;
1235 CHECK_PROCESS (process
);
1238 XPROCESS (process
)->plist
= plist
;
1242 #if 0 /* Turned off because we don't currently record this info
1243 in the process. Perhaps add it. */
1244 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1245 doc
: /* Return the connection type of PROCESS.
1246 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1247 a socket connection. */)
1249 Lisp_Object process
;
1251 return XPROCESS (process
)->type
;
1256 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1258 doc
: /* Convert network ADDRESS from internal format to a string.
1259 A 4 or 5 element vector represents an IPv4 address (with port number).
1260 An 8 or 9 element vector represents an IPv6 address (with port number).
1261 If optional second argument OMIT-PORT is non-nil, don't include a port
1262 number in the string, even when present in ADDRESS.
1263 Returns nil if format of ADDRESS is invalid. */)
1264 (address
, omit_port
)
1265 Lisp_Object address
, omit_port
;
1270 if (STRINGP (address
)) /* AF_LOCAL */
1273 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1275 register struct Lisp_Vector
*p
= XVECTOR (address
);
1276 Lisp_Object args
[10];
1279 if (p
->size
== 4 || (p
->size
== 5 && !NILP (omit_port
)))
1281 args
[0] = build_string ("%d.%d.%d.%d");
1284 else if (p
->size
== 5)
1286 args
[0] = build_string ("%d.%d.%d.%d:%d");
1289 else if (p
->size
== 8 || (p
->size
== 9 && !NILP (omit_port
)))
1291 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1294 else if (p
->size
== 9)
1296 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1302 for (i
= 0; i
< nargs
; i
++)
1304 EMACS_INT element
= XINT (p
->contents
[i
]);
1306 if (element
< 0 || element
> 65535)
1309 if (nargs
<= 5 /* IPv4 */
1310 && i
< 4 /* host, not port */
1314 args
[i
+1] = p
->contents
[i
];
1317 return Fformat (nargs
+1, args
);
1320 if (CONSP (address
))
1322 Lisp_Object args
[2];
1323 args
[0] = build_string ("<Family %d>");
1324 args
[1] = Fcar (address
);
1325 return Fformat (2, args
);
1333 list_processes_1 (query_only
)
1334 Lisp_Object query_only
;
1336 register Lisp_Object tail
, tem
;
1337 Lisp_Object proc
, minspace
, tem1
;
1338 register struct Lisp_Process
*p
;
1340 int w_proc
, w_buffer
, w_tty
;
1342 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1344 w_proc
= 4; /* Proc */
1345 w_buffer
= 6; /* Buffer */
1346 w_tty
= 0; /* Omit if no ttys */
1348 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
1352 proc
= Fcdr (XCAR (tail
));
1353 p
= XPROCESS (proc
);
1354 if (NILP (p
->childp
))
1356 if (!NILP (query_only
) && p
->kill_without_query
)
1358 if (STRINGP (p
->name
)
1359 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1361 if (!NILP (p
->buffer
))
1363 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1364 w_buffer
= 8; /* (Killed) */
1365 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1368 if (STRINGP (p
->tty_name
)
1369 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1373 XSETFASTINT (i_status
, w_proc
+ 1);
1374 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1377 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1378 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1381 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1384 XSETFASTINT (minspace
, 1);
1386 set_buffer_internal (XBUFFER (Vstandard_output
));
1387 current_buffer
->undo_list
= Qt
;
1389 current_buffer
->truncate_lines
= Qt
;
1391 write_string ("Proc", -1);
1392 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1393 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1396 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1398 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1399 write_string ("\n", -1);
1401 write_string ("----", -1);
1402 Findent_to (i_status
, minspace
); write_string ("------", -1);
1403 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1406 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1408 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1409 write_string ("\n", -1);
1411 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
1415 proc
= Fcdr (XCAR (tail
));
1416 p
= XPROCESS (proc
);
1417 if (NILP (p
->childp
))
1419 if (!NILP (query_only
) && p
->kill_without_query
)
1422 Finsert (1, &p
->name
);
1423 Findent_to (i_status
, minspace
);
1425 if (p
->raw_status_new
)
1428 if (CONSP (p
->status
))
1429 symbol
= XCAR (p
->status
);
1431 if (EQ (symbol
, Qsignal
))
1434 tem
= Fcar (Fcdr (p
->status
));
1436 if (XINT (tem
) < NSIG
)
1437 write_string (sys_errlist
[XINT (tem
)], -1);
1440 Fprinc (symbol
, Qnil
);
1442 else if (NETCONN1_P (p
))
1444 if (EQ (symbol
, Qexit
))
1445 write_string ("closed", -1);
1446 else if (EQ (p
->command
, Qt
))
1447 write_string ("stopped", -1);
1448 else if (EQ (symbol
, Qrun
))
1449 write_string ("open", -1);
1451 Fprinc (symbol
, Qnil
);
1454 Fprinc (symbol
, Qnil
);
1456 if (EQ (symbol
, Qexit
))
1459 tem
= Fcar (Fcdr (p
->status
));
1462 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1463 write_string (tembuf
, -1);
1467 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
) || EQ (symbol
, Qclosed
))
1470 Findent_to (i_buffer
, minspace
);
1471 if (NILP (p
->buffer
))
1472 insert_string ("(none)");
1473 else if (NILP (XBUFFER (p
->buffer
)->name
))
1474 insert_string ("(Killed)");
1476 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1480 Findent_to (i_tty
, minspace
);
1481 if (STRINGP (p
->tty_name
))
1482 Finsert (1, &p
->tty_name
);
1485 Findent_to (i_command
, minspace
);
1487 if (EQ (p
->status
, Qlisten
))
1489 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1490 if (INTEGERP (port
))
1491 port
= Fnumber_to_string (port
);
1493 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1494 sprintf (tembuf
, "(network %s server on %s)\n",
1495 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1496 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1497 insert_string (tembuf
);
1499 else if (NETCONN1_P (p
))
1501 /* For a local socket, there is no host name,
1502 so display service instead. */
1503 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1504 if (!STRINGP (host
))
1506 host
= Fplist_get (p
->childp
, QCservice
);
1507 if (INTEGERP (host
))
1508 host
= Fnumber_to_string (host
);
1511 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1512 sprintf (tembuf
, "(network %s connection to %s)\n",
1513 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1514 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1515 insert_string (tembuf
);
1527 insert_string (" ");
1529 insert_string ("\n");
1533 status_notify (NULL
);
1537 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1538 doc
: /* Display a list of all processes.
1539 If optional argument QUERY-ONLY is non-nil, only processes with
1540 the query-on-exit flag set will be listed.
1541 Any process listed as exited or signaled is actually eliminated
1542 after the listing is made. */)
1544 Lisp_Object query_only
;
1546 internal_with_output_to_temp_buffer ("*Process List*",
1547 list_processes_1
, query_only
);
1551 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1552 doc
: /* Return a list of all processes. */)
1555 return Fmapcar (Qcdr
, Vprocess_alist
);
1558 /* Starting asynchronous inferior processes. */
1560 static Lisp_Object
start_process_unwind ();
1562 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1563 doc
: /* Start a program in a subprocess. Return the process object for it.
1564 NAME is name for process. It is modified if necessary to make it unique.
1565 BUFFER is the buffer (or buffer name) to associate with the process.
1567 Process output (both standard output and standard error streams) goes
1568 at end of BUFFER, unless you specify an output stream or filter
1569 function to handle the output. BUFFER may also be nil, meaning that
1570 this process is not associated with any buffer.
1572 PROGRAM is the program file name. It is searched for in PATH.
1573 Remaining arguments are strings to give program as arguments.
1575 If you want to separate standard output from standard error, invoke
1576 the command through a shell and redirect one of them using the shell
1579 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1582 register Lisp_Object
*args
;
1584 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1586 register unsigned char *new_argv
;
1589 register unsigned char **new_argv
;
1592 int count
= SPECPDL_INDEX ();
1596 buffer
= Fget_buffer_create (buffer
);
1598 /* Make sure that the child will be able to chdir to the current
1599 buffer's current directory, or its unhandled equivalent. We
1600 can't just have the child check for an error when it does the
1601 chdir, since it's in a vfork.
1603 We have to GCPRO around this because Fexpand_file_name and
1604 Funhandled_file_name_directory might call a file name handling
1605 function. The argument list is protected by the caller, so all
1606 we really have to worry about is buffer. */
1608 struct gcpro gcpro1
, gcpro2
;
1610 current_dir
= current_buffer
->directory
;
1612 GCPRO2 (buffer
, current_dir
);
1615 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1617 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1618 report_file_error ("Setting current directory",
1619 Fcons (current_buffer
->directory
, Qnil
));
1625 CHECK_STRING (name
);
1629 CHECK_STRING (program
);
1631 proc
= make_process (name
);
1632 /* If an error occurs and we can't start the process, we want to
1633 remove it from the process list. This means that each error
1634 check in create_process doesn't need to call remove_process
1635 itself; it's all taken care of here. */
1636 record_unwind_protect (start_process_unwind
, proc
);
1638 XPROCESS (proc
)->childp
= Qt
;
1639 XPROCESS (proc
)->plist
= Qnil
;
1640 XPROCESS (proc
)->buffer
= buffer
;
1641 XPROCESS (proc
)->sentinel
= Qnil
;
1642 XPROCESS (proc
)->filter
= Qnil
;
1643 XPROCESS (proc
)->filter_multibyte
1644 = !NILP (buffer_defaults
.enable_multibyte_characters
);
1645 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1647 #ifdef ADAPTIVE_READ_BUFFERING
1648 XPROCESS (proc
)->adaptive_read_buffering
1649 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1650 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1653 /* Make the process marker point into the process buffer (if any). */
1654 if (BUFFERP (buffer
))
1655 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1656 BUF_ZV (XBUFFER (buffer
)),
1657 BUF_ZV_BYTE (XBUFFER (buffer
)));
1660 /* Decide coding systems for communicating with the process. Here
1661 we don't setup the structure coding_system nor pay attention to
1662 unibyte mode. They are done in create_process. */
1664 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1665 Lisp_Object coding_systems
= Qt
;
1666 Lisp_Object val
, *args2
;
1667 struct gcpro gcpro1
, gcpro2
;
1669 val
= Vcoding_system_for_read
;
1672 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1673 args2
[0] = Qstart_process
;
1674 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1675 GCPRO2 (proc
, current_dir
);
1676 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1678 if (CONSP (coding_systems
))
1679 val
= XCAR (coding_systems
);
1680 else if (CONSP (Vdefault_process_coding_system
))
1681 val
= XCAR (Vdefault_process_coding_system
);
1683 XPROCESS (proc
)->decode_coding_system
= val
;
1685 val
= Vcoding_system_for_write
;
1688 if (EQ (coding_systems
, Qt
))
1690 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1691 args2
[0] = Qstart_process
;
1692 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1693 GCPRO2 (proc
, current_dir
);
1694 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1697 if (CONSP (coding_systems
))
1698 val
= XCDR (coding_systems
);
1699 else if (CONSP (Vdefault_process_coding_system
))
1700 val
= XCDR (Vdefault_process_coding_system
);
1702 XPROCESS (proc
)->encode_coding_system
= val
;
1706 /* Make a one member argv with all args concatenated
1707 together separated by a blank. */
1708 len
= SBYTES (program
) + 2;
1709 for (i
= 3; i
< nargs
; i
++)
1713 len
+= SBYTES (tem
) + 1; /* count the blank */
1715 new_argv
= (unsigned char *) alloca (len
);
1716 strcpy (new_argv
, SDATA (program
));
1717 for (i
= 3; i
< nargs
; i
++)
1721 strcat (new_argv
, " ");
1722 strcat (new_argv
, SDATA (tem
));
1724 /* Need to add code here to check for program existence on VMS */
1727 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1729 /* If program file name is not absolute, search our path for it.
1730 Put the name we will really use in TEM. */
1731 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1732 && !(SCHARS (program
) > 1
1733 && IS_DEVICE_SEP (SREF (program
, 1))))
1735 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1738 GCPRO4 (name
, program
, buffer
, current_dir
);
1739 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1742 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1743 tem
= Fexpand_file_name (tem
, Qnil
);
1747 if (!NILP (Ffile_directory_p (program
)))
1748 error ("Specified program for new process is a directory");
1752 /* If program file name starts with /: for quoting a magic name,
1754 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1755 && SREF (tem
, 1) == ':')
1756 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1758 /* Encode the file name and put it in NEW_ARGV.
1759 That's where the child will use it to execute the program. */
1760 tem
= ENCODE_FILE (tem
);
1761 new_argv
[0] = SDATA (tem
);
1763 /* Here we encode arguments by the coding system used for sending
1764 data to the process. We don't support using different coding
1765 systems for encoding arguments and for encoding data sent to the
1768 for (i
= 3; i
< nargs
; i
++)
1772 if (STRING_MULTIBYTE (tem
))
1773 tem
= (code_convert_string_norecord
1774 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1775 new_argv
[i
- 2] = SDATA (tem
);
1777 new_argv
[i
- 2] = 0;
1778 #endif /* not VMS */
1780 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1781 XPROCESS (proc
)->decoding_carryover
= 0;
1782 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1784 XPROCESS (proc
)->inherit_coding_system_flag
1785 = !(NILP (buffer
) || !inherit_process_coding_system
);
1787 create_process (proc
, (char **) new_argv
, current_dir
);
1789 return unbind_to (count
, proc
);
1792 /* This function is the unwind_protect form for Fstart_process. If
1793 PROC doesn't have its pid set, then we know someone has signaled
1794 an error and the process wasn't started successfully, so we should
1795 remove it from the process list. */
1797 start_process_unwind (proc
)
1800 if (!PROCESSP (proc
))
1803 /* Was PROC started successfully? */
1804 if (XPROCESS (proc
)->pid
<= 0)
1805 remove_process (proc
);
1811 create_process_1 (timer
)
1812 struct atimer
*timer
;
1814 /* Nothing to do. */
1818 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1821 /* Mimic blocking of signals on system V, which doesn't really have it. */
1823 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1824 int sigchld_deferred
;
1827 create_process_sigchld ()
1829 signal (SIGCHLD
, create_process_sigchld
);
1831 sigchld_deferred
= 1;
1837 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1839 create_process (process
, new_argv
, current_dir
)
1840 Lisp_Object process
;
1842 Lisp_Object current_dir
;
1844 int inchannel
, outchannel
;
1847 #ifdef POSIX_SIGNALS
1850 struct sigaction sigint_action
;
1851 struct sigaction sigquit_action
;
1853 struct sigaction sighup_action
;
1855 #else /* !POSIX_SIGNALS */
1858 SIGTYPE (*sigchld
)();
1861 #endif /* !POSIX_SIGNALS */
1862 /* Use volatile to protect variables from being clobbered by longjmp. */
1863 volatile int forkin
, forkout
;
1864 volatile int pty_flag
= 0;
1866 extern char **environ
;
1869 inchannel
= outchannel
= -1;
1872 if (!NILP (Vprocess_connection_type
))
1873 outchannel
= inchannel
= allocate_pty ();
1877 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1878 /* On most USG systems it does not work to open the pty's tty here,
1879 then close it and reopen it in the child. */
1881 /* Don't let this terminal become our controlling terminal
1882 (in case we don't have one). */
1883 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1885 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1888 report_file_error ("Opening pty", Qnil
);
1889 #if defined (RTU) || defined (UNIPLUS) || defined (DONT_REOPEN_PTY)
1890 /* In the case that vfork is defined as fork, the parent process
1891 (Emacs) may send some data before the child process completes
1892 tty options setup. So we setup tty before forking. */
1893 child_setup_tty (forkout
);
1894 #endif /* RTU or UNIPLUS or DONT_REOPEN_PTY */
1896 forkin
= forkout
= -1;
1897 #endif /* not USG, or USG_SUBTTY_WORKS */
1901 #endif /* HAVE_PTYS */
1904 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1905 report_file_error ("Opening socketpair", Qnil
);
1906 outchannel
= inchannel
= sv
[0];
1907 forkout
= forkin
= sv
[1];
1909 #else /* not SKTPAIR */
1914 report_file_error ("Creating pipe", Qnil
);
1920 emacs_close (inchannel
);
1921 emacs_close (forkout
);
1922 report_file_error ("Creating pipe", Qnil
);
1927 #endif /* not SKTPAIR */
1930 /* Replaced by close_process_descs */
1931 set_exclusive_use (inchannel
);
1932 set_exclusive_use (outchannel
);
1935 /* Stride people say it's a mystery why this is needed
1936 as well as the O_NDELAY, but that it fails without this. */
1937 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1940 ioctl (inchannel
, FIONBIO
, &one
);
1945 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1946 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1949 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1950 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1954 /* Record this as an active process, with its channels.
1955 As a result, child_setup will close Emacs's side of the pipes. */
1956 chan_process
[inchannel
] = process
;
1957 XPROCESS (process
)->infd
= inchannel
;
1958 XPROCESS (process
)->outfd
= outchannel
;
1960 /* Previously we recorded the tty descriptor used in the subprocess.
1961 It was only used for getting the foreground tty process, so now
1962 we just reopen the device (see emacs_get_tty_pgrp) as this is
1963 more portable (see USG_SUBTTY_WORKS above). */
1965 XPROCESS (process
)->pty_flag
= pty_flag
;
1966 XPROCESS (process
)->status
= Qrun
;
1967 setup_process_coding_systems (process
);
1969 /* Delay interrupts until we have a chance to store
1970 the new fork's pid in its process structure */
1971 #ifdef POSIX_SIGNALS
1972 sigemptyset (&blocked
);
1974 sigaddset (&blocked
, SIGCHLD
);
1976 #ifdef HAVE_WORKING_VFORK
1977 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1978 this sets the parent's signal handlers as well as the child's.
1979 So delay all interrupts whose handlers the child might munge,
1980 and record the current handlers so they can be restored later. */
1981 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1982 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1984 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1986 #endif /* HAVE_WORKING_VFORK */
1987 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1988 #else /* !POSIX_SIGNALS */
1992 #else /* not BSD4_1 */
1993 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1994 sigsetmask (sigmask (SIGCHLD
));
1995 #else /* ordinary USG */
1997 sigchld_deferred
= 0;
1998 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
2000 #endif /* ordinary USG */
2001 #endif /* not BSD4_1 */
2002 #endif /* SIGCHLD */
2003 #endif /* !POSIX_SIGNALS */
2005 FD_SET (inchannel
, &input_wait_mask
);
2006 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2007 if (inchannel
> max_process_desc
)
2008 max_process_desc
= inchannel
;
2010 /* Until we store the proper pid, enable sigchld_handler
2011 to recognize an unknown pid as standing for this process.
2012 It is very important not to let this `marker' value stay
2013 in the table after this function has returned; if it does
2014 it might cause call-process to hang and subsequent asynchronous
2015 processes to get their return values scrambled. */
2016 XPROCESS (process
)->pid
= -1;
2021 /* child_setup must clobber environ on systems with true vfork.
2022 Protect it from permanent change. */
2023 char **save_environ
= environ
;
2025 current_dir
= ENCODE_FILE (current_dir
);
2030 #endif /* not WINDOWSNT */
2032 int xforkin
= forkin
;
2033 int xforkout
= forkout
;
2035 #if 0 /* This was probably a mistake--it duplicates code later on,
2036 but fails to handle all the cases. */
2037 /* Make sure SIGCHLD is not blocked in the child. */
2038 sigsetmask (SIGEMPTYMASK
);
2041 /* Make the pty be the controlling terminal of the process. */
2043 /* First, disconnect its current controlling terminal. */
2045 /* We tried doing setsid only if pty_flag, but it caused
2046 process_set_signal to fail on SGI when using a pipe. */
2048 /* Make the pty's terminal the controlling terminal. */
2052 /* We ignore the return value
2053 because faith@cs.unc.edu says that is necessary on Linux. */
2054 ioctl (xforkin
, TIOCSCTTY
, 0);
2057 #else /* not HAVE_SETSID */
2059 /* It's very important to call setpgrp here and no time
2060 afterwards. Otherwise, we lose our controlling tty which
2061 is set when we open the pty. */
2064 #endif /* not HAVE_SETSID */
2065 #if defined (HAVE_TERMIOS) && defined (LDISC1)
2066 if (pty_flag
&& xforkin
>= 0)
2069 tcgetattr (xforkin
, &t
);
2071 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
2072 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
2075 #if defined (NTTYDISC) && defined (TIOCSETD)
2076 if (pty_flag
&& xforkin
>= 0)
2078 /* Use new line discipline. */
2079 int ldisc
= NTTYDISC
;
2080 ioctl (xforkin
, TIOCSETD
, &ldisc
);
2085 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
2086 can do TIOCSPGRP only to the process's controlling tty. */
2089 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
2090 I can't test it since I don't have 4.3. */
2091 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
2092 ioctl (j
, TIOCNOTTY
, 0);
2095 /* In order to get a controlling terminal on some versions
2096 of BSD, it is necessary to put the process in pgrp 0
2097 before it opens the terminal. */
2105 #endif /* TIOCNOTTY */
2107 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2108 /*** There is a suggestion that this ought to be a
2109 conditional on TIOCSPGRP,
2110 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2111 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2112 that system does seem to need this code, even though
2113 both HAVE_SETSID and TIOCSCTTY are defined. */
2114 /* Now close the pty (if we had it open) and reopen it.
2115 This makes the pty the controlling terminal of the subprocess. */
2118 #ifdef SET_CHILD_PTY_PGRP
2119 int pgrp
= getpid ();
2122 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2125 emacs_close (xforkin
);
2126 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2130 emacs_write (1, "Couldn't open the pty terminal ", 31);
2131 emacs_write (1, pty_name
, strlen (pty_name
));
2132 emacs_write (1, "\n", 1);
2136 #ifdef SET_CHILD_PTY_PGRP
2137 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2138 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2141 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2143 #ifdef SETUP_SLAVE_PTY
2148 #endif /* SETUP_SLAVE_PTY */
2150 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2151 Now reenable it in the child, so it will die when we want it to. */
2153 signal (SIGHUP
, SIG_DFL
);
2155 #endif /* HAVE_PTYS */
2157 signal (SIGINT
, SIG_DFL
);
2158 signal (SIGQUIT
, SIG_DFL
);
2160 /* Stop blocking signals in the child. */
2161 #ifdef POSIX_SIGNALS
2162 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2163 #else /* !POSIX_SIGNALS */
2167 #else /* not BSD4_1 */
2168 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2169 sigsetmask (SIGEMPTYMASK
);
2170 #else /* ordinary USG */
2172 signal (SIGCHLD
, sigchld
);
2174 #endif /* ordinary USG */
2175 #endif /* not BSD4_1 */
2176 #endif /* SIGCHLD */
2177 #endif /* !POSIX_SIGNALS */
2179 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2181 child_setup_tty (xforkout
);
2182 #endif /* not RTU and not UNIPLUS and not DONT_REOPEN_PTY */
2184 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2185 new_argv
, 1, current_dir
);
2186 #else /* not WINDOWSNT */
2187 child_setup (xforkin
, xforkout
, xforkout
,
2188 new_argv
, 1, current_dir
);
2189 #endif /* not WINDOWSNT */
2191 environ
= save_environ
;
2196 /* This runs in the Emacs process. */
2200 emacs_close (forkin
);
2201 if (forkin
!= forkout
&& forkout
>= 0)
2202 emacs_close (forkout
);
2206 /* vfork succeeded. */
2207 XPROCESS (process
)->pid
= pid
;
2210 register_child (pid
, inchannel
);
2211 #endif /* WINDOWSNT */
2213 /* If the subfork execv fails, and it exits,
2214 this close hangs. I don't know why.
2215 So have an interrupt jar it loose. */
2217 struct atimer
*timer
;
2221 EMACS_SET_SECS_USECS (offset
, 1, 0);
2222 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2225 emacs_close (forkin
);
2227 cancel_atimer (timer
);
2231 if (forkin
!= forkout
&& forkout
>= 0)
2232 emacs_close (forkout
);
2236 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2239 XPROCESS (process
)->tty_name
= Qnil
;
2242 /* Restore the signal state whether vfork succeeded or not.
2243 (We will signal an error, below, if it failed.) */
2244 #ifdef POSIX_SIGNALS
2245 #ifdef HAVE_WORKING_VFORK
2246 /* Restore the parent's signal handlers. */
2247 sigaction (SIGINT
, &sigint_action
, 0);
2248 sigaction (SIGQUIT
, &sigquit_action
, 0);
2250 sigaction (SIGHUP
, &sighup_action
, 0);
2252 #endif /* HAVE_WORKING_VFORK */
2253 /* Stop blocking signals in the parent. */
2254 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2255 #else /* !POSIX_SIGNALS */
2259 #else /* not BSD4_1 */
2260 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2261 sigsetmask (SIGEMPTYMASK
);
2262 #else /* ordinary USG */
2264 signal (SIGCHLD
, sigchld
);
2265 /* Now really handle any of these signals
2266 that came in during this function. */
2267 if (sigchld_deferred
)
2268 kill (getpid (), SIGCHLD
);
2270 #endif /* ordinary USG */
2271 #endif /* not BSD4_1 */
2272 #endif /* SIGCHLD */
2273 #endif /* !POSIX_SIGNALS */
2275 /* Now generate the error if vfork failed. */
2277 report_file_error ("Doing vfork", Qnil
);
2279 #endif /* not VMS */
2284 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2285 The address family of sa is not included in the result. */
2288 conv_sockaddr_to_lisp (sa
, len
)
2289 struct sockaddr
*sa
;
2292 Lisp_Object address
;
2295 register struct Lisp_Vector
*p
;
2297 switch (sa
->sa_family
)
2301 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2302 len
= sizeof (sin
->sin_addr
) + 1;
2303 address
= Fmake_vector (make_number (len
), Qnil
);
2304 p
= XVECTOR (address
);
2305 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2306 cp
= (unsigned char *)&sin
->sin_addr
;
2312 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2313 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2314 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2315 address
= Fmake_vector (make_number (len
), Qnil
);
2316 p
= XVECTOR (address
);
2317 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2318 for (i
= 0; i
< len
; i
++)
2319 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2323 #ifdef HAVE_LOCAL_SOCKETS
2326 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2327 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2328 if (sockun
->sun_path
[i
] == 0)
2330 return make_unibyte_string (sockun
->sun_path
, i
);
2334 len
-= sizeof (sa
->sa_family
);
2335 address
= Fcons (make_number (sa
->sa_family
),
2336 Fmake_vector (make_number (len
), Qnil
));
2337 p
= XVECTOR (XCDR (address
));
2338 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2344 p
->contents
[i
++] = make_number (*cp
++);
2350 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2353 get_lisp_to_sockaddr_size (address
, familyp
)
2354 Lisp_Object address
;
2357 register struct Lisp_Vector
*p
;
2359 if (VECTORP (address
))
2361 p
= XVECTOR (address
);
2365 return sizeof (struct sockaddr_in
);
2368 else if (p
->size
== 9)
2370 *familyp
= AF_INET6
;
2371 return sizeof (struct sockaddr_in6
);
2375 #ifdef HAVE_LOCAL_SOCKETS
2376 else if (STRINGP (address
))
2378 *familyp
= AF_LOCAL
;
2379 return sizeof (struct sockaddr_un
);
2382 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2384 struct sockaddr
*sa
;
2385 *familyp
= XINT (XCAR (address
));
2386 p
= XVECTOR (XCDR (address
));
2387 return p
->size
+ sizeof (sa
->sa_family
);
2392 /* Convert an address object (vector or string) to an internal sockaddr.
2394 The address format has been basically validated by
2395 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2396 it could have come from user data. So if FAMILY is not valid,
2397 we return after zeroing *SA. */
2400 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2402 Lisp_Object address
;
2403 struct sockaddr
*sa
;
2406 register struct Lisp_Vector
*p
;
2407 register unsigned char *cp
= NULL
;
2412 if (VECTORP (address
))
2414 p
= XVECTOR (address
);
2415 if (family
== AF_INET
)
2417 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2418 len
= sizeof (sin
->sin_addr
) + 1;
2419 i
= XINT (p
->contents
[--len
]);
2420 sin
->sin_port
= htons (i
);
2421 cp
= (unsigned char *)&sin
->sin_addr
;
2422 sa
->sa_family
= family
;
2425 else if (family
== AF_INET6
)
2427 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2428 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2429 len
= sizeof (sin6
->sin6_addr
) + 1;
2430 i
= XINT (p
->contents
[--len
]);
2431 sin6
->sin6_port
= htons (i
);
2432 for (i
= 0; i
< len
; i
++)
2433 if (INTEGERP (p
->contents
[i
]))
2435 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2438 sa
->sa_family
= family
;
2443 else if (STRINGP (address
))
2445 #ifdef HAVE_LOCAL_SOCKETS
2446 if (family
== AF_LOCAL
)
2448 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2449 cp
= SDATA (address
);
2450 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2451 sockun
->sun_path
[i
] = *cp
++;
2452 sa
->sa_family
= family
;
2459 p
= XVECTOR (XCDR (address
));
2460 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2463 for (i
= 0; i
< len
; i
++)
2464 if (INTEGERP (p
->contents
[i
]))
2465 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2468 #ifdef DATAGRAM_SOCKETS
2469 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2471 doc
: /* Get the current datagram address associated with PROCESS. */)
2473 Lisp_Object process
;
2477 CHECK_PROCESS (process
);
2479 if (!DATAGRAM_CONN_P (process
))
2482 channel
= XPROCESS (process
)->infd
;
2483 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2484 datagram_address
[channel
].len
);
2487 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2489 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2490 Returns nil upon error setting address, ADDRESS otherwise. */)
2492 Lisp_Object process
, address
;
2497 CHECK_PROCESS (process
);
2499 if (!DATAGRAM_CONN_P (process
))
2502 channel
= XPROCESS (process
)->infd
;
2504 len
= get_lisp_to_sockaddr_size (address
, &family
);
2505 if (datagram_address
[channel
].len
!= len
)
2507 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2513 static struct socket_options
{
2514 /* The name of this option. Should be lowercase version of option
2515 name without SO_ prefix. */
2517 /* Option level SOL_... */
2519 /* Option number SO_... */
2521 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2522 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2523 } socket_options
[] =
2525 #ifdef SO_BINDTODEVICE
2526 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2529 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2532 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2535 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2538 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2541 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2544 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2547 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2549 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2552 /* Set option OPT to value VAL on socket S.
2554 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2555 Signals an error if setting a known option fails.
2559 set_socket_option (s
, opt
, val
)
2561 Lisp_Object opt
, val
;
2564 struct socket_options
*sopt
;
2569 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2570 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2571 if (strcmp (name
, sopt
->name
) == 0)
2574 switch (sopt
->opttype
)
2579 optval
= NILP (val
) ? 0 : 1;
2580 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2581 &optval
, sizeof (optval
));
2589 optval
= XINT (val
);
2591 error ("Bad option value for %s", name
);
2592 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2593 &optval
, sizeof (optval
));
2597 #ifdef SO_BINDTODEVICE
2600 char devname
[IFNAMSIZ
+1];
2602 /* This is broken, at least in the Linux 2.4 kernel.
2603 To unbind, the arg must be a zero integer, not the empty string.
2604 This should work on all systems. KFS. 2003-09-23. */
2605 bzero (devname
, sizeof devname
);
2608 char *arg
= (char *) SDATA (val
);
2609 int len
= min (strlen (arg
), IFNAMSIZ
);
2610 bcopy (arg
, devname
, len
);
2612 else if (!NILP (val
))
2613 error ("Bad option value for %s", name
);
2614 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2623 struct linger linger
;
2626 linger
.l_linger
= 0;
2628 linger
.l_linger
= XINT (val
);
2630 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2631 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2632 &linger
, sizeof (linger
));
2642 report_file_error ("Cannot set network option",
2643 Fcons (opt
, Fcons (val
, Qnil
)));
2644 return (1 << sopt
->optbit
);
2648 DEFUN ("set-network-process-option",
2649 Fset_network_process_option
, Sset_network_process_option
,
2651 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2652 See `make-network-process' for a list of options and values.
2653 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2654 OPTION is not a supported option, return nil instead; otherwise return t. */)
2655 (process
, option
, value
, no_error
)
2656 Lisp_Object process
, option
, value
;
2657 Lisp_Object no_error
;
2660 struct Lisp_Process
*p
;
2662 CHECK_PROCESS (process
);
2663 p
= XPROCESS (process
);
2664 if (!NETCONN1_P (p
))
2665 error ("Process is not a network process");
2669 error ("Process is not running");
2671 if (set_socket_option (s
, option
, value
))
2673 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2677 if (NILP (no_error
))
2678 error ("Unknown or unsupported option");
2684 /* A version of request_sigio suitable for a record_unwind_protect. */
2687 unwind_request_sigio (dummy
)
2690 if (interrupt_input
)
2695 /* Create a network stream/datagram client/server process. Treated
2696 exactly like a normal process when reading and writing. Primary
2697 differences are in status display and process deletion. A network
2698 connection has no PID; you cannot signal it. All you can do is
2699 stop/continue it and deactivate/close it via delete-process */
2701 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2703 doc
: /* Create and return a network server or client process.
2705 In Emacs, network connections are represented by process objects, so
2706 input and output work as for subprocesses and `delete-process' closes
2707 a network connection. However, a network process has no process id,
2708 it cannot be signaled, and the status codes are different from normal
2711 Arguments are specified as keyword/argument pairs. The following
2712 arguments are defined:
2714 :name NAME -- NAME is name for process. It is modified if necessary
2717 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2718 with the process. Process output goes at end of that buffer, unless
2719 you specify an output stream or filter function to handle the output.
2720 BUFFER may be also nil, meaning that this process is not associated
2723 :host HOST -- HOST is name of the host to connect to, or its IP
2724 address. The symbol `local' specifies the local host. If specified
2725 for a server process, it must be a valid name or address for the local
2726 host, and only clients connecting to that address will be accepted.
2728 :service SERVICE -- SERVICE is name of the service desired, or an
2729 integer specifying a port number to connect to. If SERVICE is t,
2730 a random port number is selected for the server. (If Emacs was
2731 compiled with getaddrinfo, a port number can also be specified as a
2732 string, e.g. "80", as well as an integer. This is not portable.)
2734 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2735 stream type connection, `datagram' creates a datagram type connection.
2737 :family FAMILY -- FAMILY is the address (and protocol) family for the
2738 service specified by HOST and SERVICE. The default (nil) is to use
2739 whatever address family (IPv4 or IPv6) that is defined for the host
2740 and port number specified by HOST and SERVICE. Other address families
2742 local -- for a local (i.e. UNIX) address specified by SERVICE.
2743 ipv4 -- use IPv4 address family only.
2744 ipv6 -- use IPv6 address family only.
2746 :local ADDRESS -- ADDRESS is the local address used for the connection.
2747 This parameter is ignored when opening a client process. When specified
2748 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2750 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2751 connection. This parameter is ignored when opening a stream server
2752 process. For a datagram server process, it specifies the initial
2753 setting of the remote datagram address. When specified for a client
2754 process, the FAMILY, HOST, and SERVICE args are ignored.
2756 The format of ADDRESS depends on the address family:
2757 - An IPv4 address is represented as an vector of integers [A B C D P]
2758 corresponding to numeric IP address A.B.C.D and port number P.
2759 - A local address is represented as a string with the address in the
2760 local address space.
2761 - An "unsupported family" address is represented by a cons (F . AV)
2762 where F is the family number and AV is a vector containing the socket
2763 address data with one element per address data byte. Do not rely on
2764 this format in portable code, as it may depend on implementation
2765 defined constants, data sizes, and data structure alignment.
2767 :coding CODING -- If CODING is a symbol, it specifies the coding
2768 system used for both reading and writing for this process. If CODING
2769 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2770 ENCODING is used for writing.
2772 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2773 return without waiting for the connection to complete; instead, the
2774 sentinel function will be called with second arg matching "open" (if
2775 successful) or "failed" when the connect completes. Default is to use
2776 a blocking connect (i.e. wait) for stream type connections.
2778 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2779 running when Emacs is exited.
2781 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2782 In the stopped state, a server process does not accept new
2783 connections, and a client process does not handle incoming traffic.
2784 The stopped state is cleared by `continue-process' and set by
2787 :filter FILTER -- Install FILTER as the process filter.
2789 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2790 process filter are multibyte, otherwise they are unibyte.
2791 If this keyword is not specified, the strings are multibyte if
2792 `default-enable-multibyte-characters' is non-nil.
2794 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2796 :log LOG -- Install LOG as the server process log function. This
2797 function is called when the server accepts a network connection from a
2798 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2799 is the server process, CLIENT is the new process for the connection,
2800 and MESSAGE is a string.
2802 :plist PLIST -- Install PLIST as the new process' initial plist.
2804 :server QLEN -- if QLEN is non-nil, create a server process for the
2805 specified FAMILY, SERVICE, and connection type (stream or datagram).
2806 If QLEN is an integer, it is used as the max. length of the server's
2807 pending connection queue (also known as the backlog); the default
2808 queue length is 5. Default is to create a client process.
2810 The following network options can be specified for this connection:
2812 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2813 :dontroute BOOL -- Only send to directly connected hosts.
2814 :keepalive BOOL -- Send keep-alive messages on network stream.
2815 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2816 :oobinline BOOL -- Place out-of-band data in receive data stream.
2817 :priority INT -- Set protocol defined priority for sent packets.
2818 :reuseaddr BOOL -- Allow reusing a recently used local address
2819 (this is allowed by default for a server process).
2820 :bindtodevice NAME -- bind to interface NAME. Using this may require
2821 special privileges on some systems.
2823 Consult the relevant system programmer's manual pages for more
2824 information on using these options.
2827 A server process will listen for and accept connections from clients.
2828 When a client connection is accepted, a new network process is created
2829 for the connection with the following parameters:
2831 - The client's process name is constructed by concatenating the server
2832 process' NAME and a client identification string.
2833 - If the FILTER argument is non-nil, the client process will not get a
2834 separate process buffer; otherwise, the client's process buffer is a newly
2835 created buffer named after the server process' BUFFER name or process
2836 NAME concatenated with the client identification string.
2837 - The connection type and the process filter and sentinel parameters are
2838 inherited from the server process' TYPE, FILTER and SENTINEL.
2839 - The client process' contact info is set according to the client's
2840 addressing information (typically an IP address and a port number).
2841 - The client process' plist is initialized from the server's plist.
2843 Notice that the FILTER and SENTINEL args are never used directly by
2844 the server process. Also, the BUFFER argument is not used directly by
2845 the server process, but via the optional :log function, accepted (and
2846 failed) connections may be logged in the server process' buffer.
2848 The original argument list, modified with the actual connection
2849 information, is available via the `process-contact' function.
2851 usage: (make-network-process &rest ARGS) */)
2857 Lisp_Object contact
;
2858 struct Lisp_Process
*p
;
2859 #ifdef HAVE_GETADDRINFO
2860 struct addrinfo ai
, *res
, *lres
;
2861 struct addrinfo hints
;
2862 char *portstring
, portbuf
[128];
2863 #else /* HAVE_GETADDRINFO */
2864 struct _emacs_addrinfo
2870 struct sockaddr
*ai_addr
;
2871 struct _emacs_addrinfo
*ai_next
;
2873 #endif /* HAVE_GETADDRINFO */
2874 struct sockaddr_in address_in
;
2875 #ifdef HAVE_LOCAL_SOCKETS
2876 struct sockaddr_un address_un
;
2881 int s
= -1, outch
, inch
;
2882 struct gcpro gcpro1
;
2883 int count
= SPECPDL_INDEX ();
2885 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2887 Lisp_Object name
, buffer
, host
, service
, address
;
2888 Lisp_Object filter
, sentinel
;
2889 int is_non_blocking_client
= 0;
2890 int is_server
= 0, backlog
= 5;
2897 /* Save arguments for process-contact and clone-process. */
2898 contact
= Flist (nargs
, args
);
2902 /* Ensure socket support is loaded if available. */
2903 init_winsock (TRUE
);
2906 /* :type TYPE (nil: stream, datagram */
2907 tem
= Fplist_get (contact
, QCtype
);
2909 socktype
= SOCK_STREAM
;
2910 #ifdef DATAGRAM_SOCKETS
2911 else if (EQ (tem
, Qdatagram
))
2912 socktype
= SOCK_DGRAM
;
2915 error ("Unsupported connection type");
2918 tem
= Fplist_get (contact
, QCserver
);
2921 /* Don't support network sockets when non-blocking mode is
2922 not available, since a blocked Emacs is not useful. */
2923 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2924 error ("Network servers not supported");
2928 backlog
= XINT (tem
);
2932 /* Make QCaddress an alias for :local (server) or :remote (client). */
2933 QCaddress
= is_server
? QClocal
: QCremote
;
2936 if (!is_server
&& socktype
== SOCK_STREAM
2937 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2939 #ifndef NON_BLOCKING_CONNECT
2940 error ("Non-blocking connect not supported");
2942 is_non_blocking_client
= 1;
2946 name
= Fplist_get (contact
, QCname
);
2947 buffer
= Fplist_get (contact
, QCbuffer
);
2948 filter
= Fplist_get (contact
, QCfilter
);
2949 sentinel
= Fplist_get (contact
, QCsentinel
);
2951 CHECK_STRING (name
);
2954 /* Let's handle TERM before things get complicated ... */
2955 host
= Fplist_get (contact
, QChost
);
2956 CHECK_STRING (host
);
2958 service
= Fplist_get (contact
, QCservice
);
2959 if (INTEGERP (service
))
2960 port
= htons ((unsigned short) XINT (service
));
2963 struct servent
*svc_info
;
2964 CHECK_STRING (service
);
2965 svc_info
= getservbyname (SDATA (service
), "tcp");
2967 error ("Unknown service: %s", SDATA (service
));
2968 port
= svc_info
->s_port
;
2971 s
= connect_server (0);
2973 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2974 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2975 send_command (s
, C_DUMB
, 1, 0);
2977 #else /* not TERM */
2979 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2980 ai
.ai_socktype
= socktype
;
2985 /* :local ADDRESS or :remote ADDRESS */
2986 address
= Fplist_get (contact
, QCaddress
);
2987 if (!NILP (address
))
2989 host
= service
= Qnil
;
2991 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2992 error ("Malformed :address");
2993 ai
.ai_family
= family
;
2994 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2995 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2999 /* :family FAMILY -- nil (for Inet), local, or integer. */
3000 tem
= Fplist_get (contact
, QCfamily
);
3003 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3009 #ifdef HAVE_LOCAL_SOCKETS
3010 else if (EQ (tem
, Qlocal
))
3014 else if (EQ (tem
, Qipv6
))
3017 else if (EQ (tem
, Qipv4
))
3019 else if (INTEGERP (tem
))
3020 family
= XINT (tem
);
3022 error ("Unknown address family");
3024 ai
.ai_family
= family
;
3026 /* :service SERVICE -- string, integer (port number), or t (random port). */
3027 service
= Fplist_get (contact
, QCservice
);
3029 #ifdef HAVE_LOCAL_SOCKETS
3030 if (family
== AF_LOCAL
)
3032 /* Host is not used. */
3034 CHECK_STRING (service
);
3035 bzero (&address_un
, sizeof address_un
);
3036 address_un
.sun_family
= AF_LOCAL
;
3037 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
3038 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3039 ai
.ai_addrlen
= sizeof address_un
;
3044 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3045 host
= Fplist_get (contact
, QChost
);
3048 if (EQ (host
, Qlocal
))
3049 host
= build_string ("localhost");
3050 CHECK_STRING (host
);
3053 /* Slow down polling to every ten seconds.
3054 Some kernels have a bug which causes retrying connect to fail
3055 after a connect. Polling can interfere with gethostbyname too. */
3056 #ifdef POLL_FOR_INPUT
3057 if (socktype
== SOCK_STREAM
)
3059 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3060 bind_polling_period (10);
3064 #ifdef HAVE_GETADDRINFO
3065 /* If we have a host, use getaddrinfo to resolve both host and service.
3066 Otherwise, use getservbyname to lookup the service. */
3070 /* SERVICE can either be a string or int.
3071 Convert to a C string for later use by getaddrinfo. */
3072 if (EQ (service
, Qt
))
3074 else if (INTEGERP (service
))
3076 sprintf (portbuf
, "%ld", (long) XINT (service
));
3077 portstring
= portbuf
;
3081 CHECK_STRING (service
);
3082 portstring
= SDATA (service
);
3087 memset (&hints
, 0, sizeof (hints
));
3089 hints
.ai_family
= family
;
3090 hints
.ai_socktype
= socktype
;
3091 hints
.ai_protocol
= 0;
3093 #ifdef HAVE_RES_INIT
3097 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
3099 #ifdef HAVE_GAI_STRERROR
3100 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
3102 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
3108 #endif /* HAVE_GETADDRINFO */
3110 /* We end up here if getaddrinfo is not defined, or in case no hostname
3111 has been specified (e.g. for a local server process). */
3113 if (EQ (service
, Qt
))
3115 else if (INTEGERP (service
))
3116 port
= htons ((unsigned short) XINT (service
));
3119 struct servent
*svc_info
;
3120 CHECK_STRING (service
);
3121 svc_info
= getservbyname (SDATA (service
),
3122 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3124 error ("Unknown service: %s", SDATA (service
));
3125 port
= svc_info
->s_port
;
3128 bzero (&address_in
, sizeof address_in
);
3129 address_in
.sin_family
= family
;
3130 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3131 address_in
.sin_port
= port
;
3133 #ifndef HAVE_GETADDRINFO
3136 struct hostent
*host_info_ptr
;
3138 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3139 as it may `hang' Emacs for a very long time. */
3143 #ifdef HAVE_RES_INIT
3147 host_info_ptr
= gethostbyname (SDATA (host
));
3152 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
3153 host_info_ptr
->h_length
);
3154 family
= host_info_ptr
->h_addrtype
;
3155 address_in
.sin_family
= family
;
3158 /* Attempt to interpret host as numeric inet address */
3160 IN_ADDR numeric_addr
;
3161 numeric_addr
= inet_addr ((char *) SDATA (host
));
3162 if (NUMERIC_ADDR_ERROR
)
3163 error ("Unknown host \"%s\"", SDATA (host
));
3165 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
3166 sizeof (address_in
.sin_addr
));
3170 #endif /* not HAVE_GETADDRINFO */
3172 ai
.ai_family
= family
;
3173 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3174 ai
.ai_addrlen
= sizeof address_in
;
3179 /* Previously this was compiled unconditionally, but that seems
3180 unnecessary on modern systems, and `unrequest_sigio' was a noop
3181 under X anyway. --lorentey */
3182 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3183 when connect is interrupted. So let's not let it get interrupted.
3184 Note we do not turn off polling, because polling is only used
3185 when not interrupt_input, and thus not normally used on the systems
3186 which have this bug. On systems which use polling, there's no way
3187 to quit if polling is turned off. */
3189 && !is_server
&& socktype
== SOCK_STREAM
)
3191 /* Comment from KFS: The original open-network-stream code
3192 didn't unwind protect this, but it seems like the proper
3193 thing to do. In any case, I don't see how it could harm to
3194 do this -- and it makes cleanup (using unbind_to) easier. */
3195 record_unwind_protect (unwind_request_sigio
, Qnil
);
3200 /* Do this in case we never enter the for-loop below. */
3201 count1
= SPECPDL_INDEX ();
3204 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3210 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3217 #ifdef DATAGRAM_SOCKETS
3218 if (!is_server
&& socktype
== SOCK_DGRAM
)
3220 #endif /* DATAGRAM_SOCKETS */
3222 #ifdef NON_BLOCKING_CONNECT
3223 if (is_non_blocking_client
)
3226 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3228 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3240 /* Make us close S if quit. */
3241 record_unwind_protect (close_file_unwind
, make_number (s
));
3243 /* Parse network options in the arg list.
3244 We simply ignore anything which isn't a known option (including other keywords).
3245 An error is signalled if setting a known option fails. */
3246 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3247 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3251 /* Configure as a server socket. */
3253 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3254 explicit :reuseaddr key to override this. */
3255 #ifdef HAVE_LOCAL_SOCKETS
3256 if (family
!= AF_LOCAL
)
3258 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3261 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3262 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3265 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3266 report_file_error ("Cannot bind server socket", Qnil
);
3268 #ifdef HAVE_GETSOCKNAME
3269 if (EQ (service
, Qt
))
3271 struct sockaddr_in sa1
;
3272 int len1
= sizeof (sa1
);
3273 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3275 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3276 service
= make_number (ntohs (sa1
.sin_port
));
3277 contact
= Fplist_put (contact
, QCservice
, service
);
3282 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3283 report_file_error ("Cannot listen on server socket", Qnil
);
3291 /* This turns off all alarm-based interrupts; the
3292 bind_polling_period call above doesn't always turn all the
3293 short-interval ones off, especially if interrupt_input is
3296 It'd be nice to be able to control the connect timeout
3297 though. Would non-blocking connect calls be portable?
3299 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3301 turn_on_atimers (0);
3303 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3306 turn_on_atimers (1);
3308 if (ret
== 0 || xerrno
== EISCONN
)
3310 /* The unwind-protect will be discarded afterwards.
3311 Likewise for immediate_quit. */
3315 #ifdef NON_BLOCKING_CONNECT
3317 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3321 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3329 /* Discard the unwind protect closing S. */
3330 specpdl_ptr
= specpdl
+ count1
;
3334 if (xerrno
== EINTR
)
3340 #ifdef DATAGRAM_SOCKETS
3341 if (socktype
== SOCK_DGRAM
)
3343 if (datagram_address
[s
].sa
)
3345 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3346 datagram_address
[s
].len
= lres
->ai_addrlen
;
3350 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3351 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3354 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3355 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3356 conv_lisp_to_sockaddr (rfamily
, remote
,
3357 datagram_address
[s
].sa
, rlen
);
3361 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3364 contact
= Fplist_put (contact
, QCaddress
,
3365 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3366 #ifdef HAVE_GETSOCKNAME
3369 struct sockaddr_in sa1
;
3370 int len1
= sizeof (sa1
);
3371 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3372 contact
= Fplist_put (contact
, QClocal
,
3373 conv_sockaddr_to_lisp (&sa1
, len1
));
3380 #ifdef HAVE_GETADDRINFO
3389 /* Discard the unwind protect for closing S, if any. */
3390 specpdl_ptr
= specpdl
+ count1
;
3392 /* Unwind bind_polling_period and request_sigio. */
3393 unbind_to (count
, Qnil
);
3397 /* If non-blocking got this far - and failed - assume non-blocking is
3398 not supported after all. This is probably a wrong assumption, but
3399 the normal blocking calls to open-network-stream handles this error
3401 if (is_non_blocking_client
)
3406 report_file_error ("make server process failed", contact
);
3408 report_file_error ("make client process failed", contact
);
3411 #endif /* not TERM */
3417 buffer
= Fget_buffer_create (buffer
);
3418 proc
= make_process (name
);
3420 chan_process
[inch
] = proc
;
3423 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3426 fcntl (inch
, F_SETFL
, O_NDELAY
);
3430 p
= XPROCESS (proc
);
3432 p
->childp
= contact
;
3433 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3436 p
->sentinel
= sentinel
;
3438 p
->filter_multibyte
= !NILP (buffer_defaults
.enable_multibyte_characters
);
3439 /* Override the above only if :filter-multibyte is specified. */
3440 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3441 p
->filter_multibyte
= !NILP (Fplist_get (contact
, QCfilter_multibyte
));
3442 p
->log
= Fplist_get (contact
, QClog
);
3443 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3444 p
->kill_without_query
= 1;
3445 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3450 if (is_server
&& socktype
== SOCK_STREAM
)
3451 p
->status
= Qlisten
;
3453 /* Make the process marker point into the process buffer (if any). */
3454 if (BUFFERP (buffer
))
3455 set_marker_both (p
->mark
, buffer
,
3456 BUF_ZV (XBUFFER (buffer
)),
3457 BUF_ZV_BYTE (XBUFFER (buffer
)));
3459 #ifdef NON_BLOCKING_CONNECT
3460 if (is_non_blocking_client
)
3462 /* We may get here if connect did succeed immediately. However,
3463 in that case, we still need to signal this like a non-blocking
3465 p
->status
= Qconnect
;
3466 if (!FD_ISSET (inch
, &connect_wait_mask
))
3468 FD_SET (inch
, &connect_wait_mask
);
3469 num_pending_connects
++;
3474 /* A server may have a client filter setting of Qt, but it must
3475 still listen for incoming connects unless it is stopped. */
3476 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3477 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3479 FD_SET (inch
, &input_wait_mask
);
3480 FD_SET (inch
, &non_keyboard_wait_mask
);
3483 if (inch
> max_process_desc
)
3484 max_process_desc
= inch
;
3486 tem
= Fplist_member (contact
, QCcoding
);
3487 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3488 tem
= Qnil
; /* No error message (too late!). */
3491 /* Setup coding systems for communicating with the network stream. */
3492 struct gcpro gcpro1
;
3493 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3494 Lisp_Object coding_systems
= Qt
;
3495 Lisp_Object args
[5], val
;
3499 val
= XCAR (XCDR (tem
));
3503 else if (!NILP (Vcoding_system_for_read
))
3504 val
= Vcoding_system_for_read
;
3505 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3506 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3507 /* We dare not decode end-of-line format by setting VAL to
3508 Qraw_text, because the existing Emacs Lisp libraries
3509 assume that they receive bare code including a sequene of
3514 if (NILP (host
) || NILP (service
))
3515 coding_systems
= Qnil
;
3518 args
[0] = Qopen_network_stream
, args
[1] = name
,
3519 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3521 coding_systems
= Ffind_operation_coding_system (5, args
);
3524 if (CONSP (coding_systems
))
3525 val
= XCAR (coding_systems
);
3526 else if (CONSP (Vdefault_process_coding_system
))
3527 val
= XCAR (Vdefault_process_coding_system
);
3531 p
->decode_coding_system
= val
;
3535 val
= XCAR (XCDR (tem
));
3539 else if (!NILP (Vcoding_system_for_write
))
3540 val
= Vcoding_system_for_write
;
3541 else if (NILP (current_buffer
->enable_multibyte_characters
))
3545 if (EQ (coding_systems
, Qt
))
3547 if (NILP (host
) || NILP (service
))
3548 coding_systems
= Qnil
;
3551 args
[0] = Qopen_network_stream
, args
[1] = name
,
3552 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3554 coding_systems
= Ffind_operation_coding_system (5, args
);
3558 if (CONSP (coding_systems
))
3559 val
= XCDR (coding_systems
);
3560 else if (CONSP (Vdefault_process_coding_system
))
3561 val
= XCDR (Vdefault_process_coding_system
);
3565 p
->encode_coding_system
= val
;
3567 setup_process_coding_systems (proc
);
3569 p
->decoding_buf
= make_uninit_string (0);
3570 p
->decoding_carryover
= 0;
3571 p
->encoding_buf
= make_uninit_string (0);
3573 p
->inherit_coding_system_flag
3574 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3579 #endif /* HAVE_SOCKETS */
3582 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3585 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3586 doc
: /* Return an alist of all network interfaces and their network address.
3587 Each element is a cons, the car of which is a string containing the
3588 interface name, and the cdr is the network address in internal
3589 format; see the description of ADDRESS in `make-network-process'. */)
3592 struct ifconf ifconf
;
3593 struct ifreq
*ifreqs
= NULL
;
3598 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3604 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3605 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3612 ifconf
.ifc_len
= buf_size
;
3613 ifconf
.ifc_req
= ifreqs
;
3614 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3620 if (ifconf
.ifc_len
== buf_size
)
3624 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3627 while (--ifaces
>= 0)
3629 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3630 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3631 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3633 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3634 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3635 res
= Fcons (Fcons (build_string (namebuf
),
3636 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3637 sizeof (struct sockaddr
))),
3643 #endif /* SIOCGIFCONF */
3645 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3652 static struct ifflag_def ifflag_table
[] = {
3656 #ifdef IFF_BROADCAST
3657 { IFF_BROADCAST
, "broadcast" },
3660 { IFF_DEBUG
, "debug" },
3663 { IFF_LOOPBACK
, "loopback" },
3665 #ifdef IFF_POINTOPOINT
3666 { IFF_POINTOPOINT
, "pointopoint" },
3669 { IFF_RUNNING
, "running" },
3672 { IFF_NOARP
, "noarp" },
3675 { IFF_PROMISC
, "promisc" },
3677 #ifdef IFF_NOTRAILERS
3678 { IFF_NOTRAILERS
, "notrailers" },
3681 { IFF_ALLMULTI
, "allmulti" },
3684 { IFF_MASTER
, "master" },
3687 { IFF_SLAVE
, "slave" },
3689 #ifdef IFF_MULTICAST
3690 { IFF_MULTICAST
, "multicast" },
3693 { IFF_PORTSEL
, "portsel" },
3695 #ifdef IFF_AUTOMEDIA
3696 { IFF_AUTOMEDIA
, "automedia" },
3699 { IFF_DYNAMIC
, "dynamic" },
3702 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3705 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3708 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3711 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3714 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3719 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3720 doc
: /* Return information about network interface named IFNAME.
3721 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3722 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3723 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3724 FLAGS is the current flags of the interface. */)
3729 Lisp_Object res
= Qnil
;
3734 CHECK_STRING (ifname
);
3736 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3737 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3739 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3744 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3745 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3747 int flags
= rq
.ifr_flags
;
3748 struct ifflag_def
*fp
;
3752 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3754 if (flags
& fp
->flag_bit
)
3756 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3757 flags
-= fp
->flag_bit
;
3760 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3762 if (flags
& (1 << fnum
))
3764 elt
= Fcons (make_number (fnum
), elt
);
3769 res
= Fcons (elt
, res
);
3772 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3773 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3775 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3776 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3780 for (n
= 0; n
< 6; n
++)
3781 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3782 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3785 res
= Fcons (elt
, res
);
3788 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3789 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3792 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3793 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3795 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3799 res
= Fcons (elt
, res
);
3802 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3803 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3806 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3809 res
= Fcons (elt
, res
);
3812 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3813 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3816 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3819 res
= Fcons (elt
, res
);
3823 return any
? res
: Qnil
;
3826 #endif /* HAVE_SOCKETS */
3828 /* Turn off input and output for process PROC. */
3831 deactivate_process (proc
)
3834 register int inchannel
, outchannel
;
3835 register struct Lisp_Process
*p
= XPROCESS (proc
);
3837 inchannel
= p
->infd
;
3838 outchannel
= p
->outfd
;
3840 #ifdef ADAPTIVE_READ_BUFFERING
3841 if (p
->read_output_delay
> 0)
3843 if (--process_output_delay_count
< 0)
3844 process_output_delay_count
= 0;
3845 p
->read_output_delay
= 0;
3846 p
->read_output_skip
= 0;
3852 /* Beware SIGCHLD hereabouts. */
3853 flush_pending_output (inchannel
);
3856 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3857 sys$
dassgn (outchannel
);
3858 vs
= get_vms_process_pointer (p
->pid
);
3860 give_back_vms_process_stuff (vs
);
3863 emacs_close (inchannel
);
3864 if (outchannel
>= 0 && outchannel
!= inchannel
)
3865 emacs_close (outchannel
);
3870 #ifdef DATAGRAM_SOCKETS
3871 if (DATAGRAM_CHAN_P (inchannel
))
3873 xfree (datagram_address
[inchannel
].sa
);
3874 datagram_address
[inchannel
].sa
= 0;
3875 datagram_address
[inchannel
].len
= 0;
3878 chan_process
[inchannel
] = Qnil
;
3879 FD_CLR (inchannel
, &input_wait_mask
);
3880 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3881 #ifdef NON_BLOCKING_CONNECT
3882 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3884 FD_CLR (inchannel
, &connect_wait_mask
);
3885 if (--num_pending_connects
< 0)
3889 if (inchannel
== max_process_desc
)
3892 /* We just closed the highest-numbered process input descriptor,
3893 so recompute the highest-numbered one now. */
3894 max_process_desc
= 0;
3895 for (i
= 0; i
< MAXDESC
; i
++)
3896 if (!NILP (chan_process
[i
]))
3897 max_process_desc
= i
;
3902 /* Close all descriptors currently in use for communication
3903 with subprocess. This is used in a newly-forked subprocess
3904 to get rid of irrelevant descriptors. */
3907 close_process_descs ()
3911 for (i
= 0; i
< MAXDESC
; i
++)
3913 Lisp_Object process
;
3914 process
= chan_process
[i
];
3915 if (!NILP (process
))
3917 int in
= XPROCESS (process
)->infd
;
3918 int out
= XPROCESS (process
)->outfd
;
3921 if (out
>= 0 && in
!= out
)
3928 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3930 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3931 It is read into the process' buffers or given to their filter functions.
3932 Non-nil arg PROCESS means do not return until some output has been received
3935 Non-nil second arg SECONDS and third arg MILLISEC are number of
3936 seconds and milliseconds to wait; return after that much time whether
3937 or not there is input. If SECONDS is a floating point number,
3938 it specifies a fractional number of seconds to wait.
3940 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3941 from PROCESS, suspending reading output from other processes.
3942 If JUST-THIS-ONE is an integer, don't run any timers either.
3943 Return non-nil if we received any output before the timeout expired. */)
3944 (process
, seconds
, millisec
, just_this_one
)
3945 register Lisp_Object process
, seconds
, millisec
, just_this_one
;
3947 int secs
, usecs
= 0;
3949 if (! NILP (process
))
3950 CHECK_PROCESS (process
);
3952 just_this_one
= Qnil
;
3954 if (!NILP (seconds
))
3956 if (INTEGERP (seconds
))
3957 secs
= XINT (seconds
);
3958 else if (FLOATP (seconds
))
3960 double timeout
= XFLOAT_DATA (seconds
);
3961 secs
= (int) timeout
;
3962 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3965 wrong_type_argument (Qnumberp
, seconds
);
3967 if (INTEGERP (millisec
))
3970 usecs
+= XINT (millisec
) * 1000;
3971 carry
= usecs
/ 1000000;
3973 if ((usecs
-= carry
* 1000000) < 0)
3980 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3981 secs
= -1, usecs
= 0;
3984 secs
= NILP (process
) ? -1 : 0;
3987 (wait_reading_process_output (secs
, usecs
, 0, 0,
3989 !NILP (process
) ? XPROCESS (process
) : NULL
,
3990 NILP (just_this_one
) ? 0 :
3991 !INTEGERP (just_this_one
) ? 1 : -1)
3995 /* Accept a connection for server process SERVER on CHANNEL. */
3997 static int connect_counter
= 0;
4000 server_accept_connection (server
, channel
)
4004 Lisp_Object proc
, caller
, name
, buffer
;
4005 Lisp_Object contact
, host
, service
;
4006 struct Lisp_Process
*ps
= XPROCESS (server
);
4007 struct Lisp_Process
*p
;
4011 struct sockaddr_in in
;
4013 struct sockaddr_in6 in6
;
4015 #ifdef HAVE_LOCAL_SOCKETS
4016 struct sockaddr_un un
;
4019 int len
= sizeof saddr
;
4021 s
= accept (channel
, &saddr
.sa
, &len
);
4030 if (code
== EWOULDBLOCK
)
4034 if (!NILP (ps
->log
))
4035 call3 (ps
->log
, server
, Qnil
,
4036 concat3 (build_string ("accept failed with code"),
4037 Fnumber_to_string (make_number (code
)),
4038 build_string ("\n")));
4044 /* Setup a new process to handle the connection. */
4046 /* Generate a unique identification of the caller, and build contact
4047 information for this process. */
4050 switch (saddr
.sa
.sa_family
)
4054 Lisp_Object args
[5];
4055 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4056 args
[0] = build_string ("%d.%d.%d.%d");
4057 args
[1] = make_number (*ip
++);
4058 args
[2] = make_number (*ip
++);
4059 args
[3] = make_number (*ip
++);
4060 args
[4] = make_number (*ip
++);
4061 host
= Fformat (5, args
);
4062 service
= make_number (ntohs (saddr
.in
.sin_port
));
4064 args
[0] = build_string (" <%s:%d>");
4067 caller
= Fformat (3, args
);
4074 Lisp_Object args
[9];
4075 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4077 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4078 for (i
= 0; i
< 8; i
++)
4079 args
[i
+1] = make_number (ntohs(ip6
[i
]));
4080 host
= Fformat (9, args
);
4081 service
= make_number (ntohs (saddr
.in
.sin_port
));
4083 args
[0] = build_string (" <[%s]:%d>");
4086 caller
= Fformat (3, args
);
4091 #ifdef HAVE_LOCAL_SOCKETS
4095 caller
= Fnumber_to_string (make_number (connect_counter
));
4096 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
4100 /* Create a new buffer name for this process if it doesn't have a
4101 filter. The new buffer name is based on the buffer name or
4102 process name of the server process concatenated with the caller
4105 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4109 buffer
= ps
->buffer
;
4111 buffer
= Fbuffer_name (buffer
);
4116 buffer
= concat2 (buffer
, caller
);
4117 buffer
= Fget_buffer_create (buffer
);
4121 /* Generate a unique name for the new server process. Combine the
4122 server process name with the caller identification. */
4124 name
= concat2 (ps
->name
, caller
);
4125 proc
= make_process (name
);
4127 chan_process
[s
] = proc
;
4130 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4133 fcntl (s
, F_SETFL
, O_NDELAY
);
4137 p
= XPROCESS (proc
);
4139 /* Build new contact information for this setup. */
4140 contact
= Fcopy_sequence (ps
->childp
);
4141 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4142 contact
= Fplist_put (contact
, QChost
, host
);
4143 if (!NILP (service
))
4144 contact
= Fplist_put (contact
, QCservice
, service
);
4145 contact
= Fplist_put (contact
, QCremote
,
4146 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4147 #ifdef HAVE_GETSOCKNAME
4149 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4150 contact
= Fplist_put (contact
, QClocal
,
4151 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4154 p
->childp
= contact
;
4155 p
->plist
= Fcopy_sequence (ps
->plist
);
4158 p
->sentinel
= ps
->sentinel
;
4159 p
->filter
= ps
->filter
;
4166 /* Client processes for accepted connections are not stopped initially. */
4167 if (!EQ (p
->filter
, Qt
))
4169 FD_SET (s
, &input_wait_mask
);
4170 FD_SET (s
, &non_keyboard_wait_mask
);
4173 if (s
> max_process_desc
)
4174 max_process_desc
= s
;
4176 /* Setup coding system for new process based on server process.
4177 This seems to be the proper thing to do, as the coding system
4178 of the new process should reflect the settings at the time the
4179 server socket was opened; not the current settings. */
4181 p
->decode_coding_system
= ps
->decode_coding_system
;
4182 p
->encode_coding_system
= ps
->encode_coding_system
;
4183 setup_process_coding_systems (proc
);
4185 p
->decoding_buf
= make_uninit_string (0);
4186 p
->decoding_carryover
= 0;
4187 p
->encoding_buf
= make_uninit_string (0);
4189 p
->inherit_coding_system_flag
4190 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4192 if (!NILP (ps
->log
))
4193 call3 (ps
->log
, server
, proc
,
4194 concat3 (build_string ("accept from "),
4195 (STRINGP (host
) ? host
: build_string ("-")),
4196 build_string ("\n")));
4198 if (!NILP (p
->sentinel
))
4199 exec_sentinel (proc
,
4200 concat3 (build_string ("open from "),
4201 (STRINGP (host
) ? host
: build_string ("-")),
4202 build_string ("\n")));
4205 /* This variable is different from waiting_for_input in keyboard.c.
4206 It is used to communicate to a lisp process-filter/sentinel (via the
4207 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4208 for user-input when that process-filter was called.
4209 waiting_for_input cannot be used as that is by definition 0 when
4210 lisp code is being evalled.
4211 This is also used in record_asynch_buffer_change.
4212 For that purpose, this must be 0
4213 when not inside wait_reading_process_output. */
4214 static int waiting_for_user_input_p
;
4217 wait_reading_process_output_unwind (data
)
4220 waiting_for_user_input_p
= XINT (data
);
4224 /* This is here so breakpoints can be put on it. */
4226 wait_reading_process_output_1 ()
4230 /* Use a wrapper around select to work around a bug in gdb 5.3.
4231 Normally, the wrapper is optimzed away by inlining.
4233 If emacs is stopped inside select, the gdb backtrace doesn't
4234 show the function which called select, so it is practically
4235 impossible to step through wait_reading_process_output. */
4239 select_wrapper (n
, rfd
, wfd
, xfd
, tmo
)
4241 SELECT_TYPE
*rfd
, *wfd
, *xfd
;
4244 return select (n
, rfd
, wfd
, xfd
, tmo
);
4246 #define select select_wrapper
4249 /* Read and dispose of subprocess output while waiting for timeout to
4250 elapse and/or keyboard input to be available.
4253 timeout in seconds, or
4254 zero for no limit, or
4255 -1 means gobble data immediately available but don't wait for any.
4258 an additional duration to wait, measured in microseconds.
4259 If this is nonzero and time_limit is 0, then the timeout
4260 consists of MICROSECS only.
4262 READ_KBD is a lisp value:
4263 0 to ignore keyboard input, or
4264 1 to return when input is available, or
4265 -1 meaning caller will actually read the input, so don't throw to
4266 the quit handler, or
4268 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4269 output that arrives.
4271 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4272 (and gobble terminal input into the buffer if any arrives).
4274 If WAIT_PROC is specified, wait until something arrives from that
4275 process. The return value is true if we read some input from
4278 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4279 (suspending output from other processes). A negative value
4280 means don't run any timers either.
4282 If WAIT_PROC is specified, then the function returns true if we
4283 received input from that process before the timeout elapsed.
4284 Otherwise, return true if we received input from any process. */
4287 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4288 wait_for_cell
, wait_proc
, just_wait_proc
)
4289 int time_limit
, microsecs
, read_kbd
, do_display
;
4290 Lisp_Object wait_for_cell
;
4291 struct Lisp_Process
*wait_proc
;
4294 register int channel
, nfds
;
4295 SELECT_TYPE Available
;
4296 #ifdef NON_BLOCKING_CONNECT
4297 SELECT_TYPE Connecting
;
4300 int check_delay
, no_avail
;
4303 EMACS_TIME timeout
, end_time
;
4304 int wait_channel
= -1;
4305 int got_some_input
= 0;
4306 int count
= SPECPDL_INDEX ();
4308 FD_ZERO (&Available
);
4309 #ifdef NON_BLOCKING_CONNECT
4310 FD_ZERO (&Connecting
);
4313 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4314 if (wait_proc
!= NULL
)
4315 wait_channel
= wait_proc
->infd
;
4317 record_unwind_protect (wait_reading_process_output_unwind
,
4318 make_number (waiting_for_user_input_p
));
4319 waiting_for_user_input_p
= read_kbd
;
4321 /* Since we may need to wait several times,
4322 compute the absolute time to return at. */
4323 if (time_limit
|| microsecs
)
4325 EMACS_GET_TIME (end_time
);
4326 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4327 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4329 #ifdef POLL_INTERRUPTED_SYS_CALL
4330 /* AlainF 5-Jul-1996
4331 HP-UX 10.10 seem to have problems with signals coming in
4332 Causes "poll: interrupted system call" messages when Emacs is run
4334 Turn off periodic alarms (in case they are in use),
4335 and then turn off any other atimers. */
4337 turn_on_atimers (0);
4338 #endif /* POLL_INTERRUPTED_SYS_CALL */
4342 int timeout_reduced_for_timers
= 0;
4344 /* If calling from keyboard input, do not quit
4345 since we want to return C-g as an input character.
4346 Otherwise, do pending quit if requested. */
4350 else if (interrupt_input_pending
)
4351 handle_async_input ();
4354 /* Exit now if the cell we're waiting for became non-nil. */
4355 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4358 /* Compute time from now till when time limit is up */
4359 /* Exit if already run out */
4360 if (time_limit
== -1)
4362 /* -1 specified for timeout means
4363 gobble output available now
4364 but don't wait at all. */
4366 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4368 else if (time_limit
|| microsecs
)
4370 EMACS_GET_TIME (timeout
);
4371 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4372 if (EMACS_TIME_NEG_P (timeout
))
4377 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4380 /* Normally we run timers here.
4381 But not if wait_for_cell; in those cases,
4382 the wait is supposed to be short,
4383 and those callers cannot handle running arbitrary Lisp code here. */
4384 if (NILP (wait_for_cell
)
4385 && just_wait_proc
>= 0)
4387 EMACS_TIME timer_delay
;
4391 int old_timers_run
= timers_run
;
4392 struct buffer
*old_buffer
= current_buffer
;
4394 timer_delay
= timer_check (1);
4396 /* If a timer has run, this might have changed buffers
4397 an alike. Make read_key_sequence aware of that. */
4398 if (timers_run
!= old_timers_run
4399 && old_buffer
!= current_buffer
4400 && waiting_for_user_input_p
== -1)
4401 record_asynch_buffer_change ();
4403 if (timers_run
!= old_timers_run
&& do_display
)
4404 /* We must retry, since a timer may have requeued itself
4405 and that could alter the time_delay. */
4406 redisplay_preserve_echo_area (9);
4410 while (!detect_input_pending ());
4412 /* If there is unread keyboard input, also return. */
4414 && requeued_events_pending_p ())
4417 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4419 EMACS_TIME difference
;
4420 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4421 if (EMACS_TIME_NEG_P (difference
))
4423 timeout
= timer_delay
;
4424 timeout_reduced_for_timers
= 1;
4427 /* If time_limit is -1, we are not going to wait at all. */
4428 else if (time_limit
!= -1)
4430 /* This is so a breakpoint can be put here. */
4431 wait_reading_process_output_1 ();
4435 /* Cause C-g and alarm signals to take immediate action,
4436 and cause input available signals to zero out timeout.
4438 It is important that we do this before checking for process
4439 activity. If we get a SIGCHLD after the explicit checks for
4440 process activity, timeout is the only way we will know. */
4442 set_waiting_for_input (&timeout
);
4444 /* If status of something has changed, and no input is
4445 available, notify the user of the change right away. After
4446 this explicit check, we'll let the SIGCHLD handler zap
4447 timeout to get our attention. */
4448 if (update_tick
!= process_tick
&& do_display
)
4451 #ifdef NON_BLOCKING_CONNECT
4455 Atemp
= input_wait_mask
;
4457 /* On Mac OS X 10.0, the SELECT system call always says input is
4458 present (for reading) at stdin, even when none is. This
4459 causes the call to SELECT below to return 1 and
4460 status_notify not to be called. As a result output of
4461 subprocesses are incorrectly discarded.
4465 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4467 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4468 if ((select (max (max (max_process_desc
, max_keyboard_desc
),
4471 #ifdef NON_BLOCKING_CONNECT
4472 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4476 (SELECT_TYPE
*)0, &timeout
)
4479 /* It's okay for us to do this and then continue with
4480 the loop, since timeout has already been zeroed out. */
4481 clear_waiting_for_input ();
4482 status_notify (NULL
);
4486 /* Don't wait for output from a non-running process. Just
4487 read whatever data has already been received. */
4488 if (wait_proc
&& wait_proc
->raw_status_new
)
4489 update_status (wait_proc
);
4491 && ! EQ (wait_proc
->status
, Qrun
)
4492 && ! EQ (wait_proc
->status
, Qconnect
))
4494 int nread
, total_nread
= 0;
4496 clear_waiting_for_input ();
4497 XSETPROCESS (proc
, wait_proc
);
4499 /* Read data from the process, until we exhaust it. */
4500 while (wait_proc
->infd
>= 0)
4502 nread
= read_process_output (proc
, wait_proc
->infd
);
4508 total_nread
+= nread
;
4510 else if (nread
== -1 && EIO
== errno
)
4514 else if (nread
== -1 && EAGAIN
== errno
)
4518 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4522 if (total_nread
> 0 && do_display
)
4523 redisplay_preserve_echo_area (10);
4528 /* Wait till there is something to do */
4530 if (wait_proc
&& just_wait_proc
)
4532 if (wait_proc
->infd
< 0) /* Terminated */
4534 FD_SET (wait_proc
->infd
, &Available
);
4536 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4538 else if (!NILP (wait_for_cell
))
4540 Available
= non_process_wait_mask
;
4542 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4547 Available
= non_keyboard_wait_mask
;
4549 Available
= input_wait_mask
;
4550 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4551 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4554 /* If frame size has changed or the window is newly mapped,
4555 redisplay now, before we start to wait. There is a race
4556 condition here; if a SIGIO arrives between now and the select
4557 and indicates that a frame is trashed, the select may block
4558 displaying a trashed screen. */
4559 if (frame_garbaged
&& do_display
)
4561 clear_waiting_for_input ();
4562 redisplay_preserve_echo_area (11);
4564 set_waiting_for_input (&timeout
);
4568 if (read_kbd
&& detect_input_pending ())
4575 #ifdef NON_BLOCKING_CONNECT
4577 Connecting
= connect_wait_mask
;
4580 #ifdef ADAPTIVE_READ_BUFFERING
4581 /* Set the timeout for adaptive read buffering if any
4582 process has non-zero read_output_skip and non-zero
4583 read_output_delay, and we are not reading output for a
4584 specific wait_channel. It is not executed if
4585 Vprocess_adaptive_read_buffering is nil. */
4586 if (process_output_skip
&& check_delay
> 0)
4588 int usecs
= EMACS_USECS (timeout
);
4589 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4590 usecs
= READ_OUTPUT_DELAY_MAX
;
4591 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4593 proc
= chan_process
[channel
];
4596 /* Find minimum non-zero read_output_delay among the
4597 processes with non-zero read_output_skip. */
4598 if (XPROCESS (proc
)->read_output_delay
> 0)
4601 if (!XPROCESS (proc
)->read_output_skip
)
4603 FD_CLR (channel
, &Available
);
4604 XPROCESS (proc
)->read_output_skip
= 0;
4605 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4606 usecs
= XPROCESS (proc
)->read_output_delay
;
4609 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4610 process_output_skip
= 0;
4614 nfds
= select (max (max (max_process_desc
, max_keyboard_desc
),
4617 #ifdef NON_BLOCKING_CONNECT
4618 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4622 (SELECT_TYPE
*)0, &timeout
);
4627 /* Make C-g and alarm signals set flags again */
4628 clear_waiting_for_input ();
4630 /* If we woke up due to SIGWINCH, actually change size now. */
4631 do_pending_window_change (0);
4633 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4634 /* We wanted the full specified time, so return now. */
4638 if (xerrno
== EINTR
)
4641 /* Ultrix select seems to return ENOMEM when it is
4642 interrupted. Treat it just like EINTR. Bleah. Note
4643 that we want to test for the "ultrix" CPP symbol, not
4644 "__ultrix__"; the latter is only defined under GCC, but
4645 not by DEC's bundled CC. -JimB */
4646 else if (xerrno
== ENOMEM
)
4650 /* This happens for no known reason on ALLIANT.
4651 I am guessing that this is the right response. -- RMS. */
4652 else if (xerrno
== EFAULT
)
4655 else if (xerrno
== EBADF
)
4658 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4659 the child's closure of the pts gives the parent a SIGHUP, and
4660 the ptc file descriptor is automatically closed,
4661 yielding EBADF here or at select() call above.
4662 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4663 in m/ibmrt-aix.h), and here we just ignore the select error.
4664 Cleanup occurs c/o status_notify after SIGCLD. */
4665 no_avail
= 1; /* Cannot depend on values returned */
4671 error ("select error: %s", emacs_strerror (xerrno
));
4676 FD_ZERO (&Available
);
4677 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4680 #if defined(sun) && !defined(USG5_4)
4681 if (nfds
> 0 && keyboard_bit_set (&Available
)
4683 /* System sometimes fails to deliver SIGIO.
4685 David J. Mackenzie says that Emacs doesn't compile under
4686 Solaris if this code is enabled, thus the USG5_4 in the CPP
4687 conditional. "I haven't noticed any ill effects so far.
4688 If you find a Solaris expert somewhere, they might know
4690 kill (getpid (), SIGIO
);
4693 #if 0 /* When polling is used, interrupt_input is 0,
4694 so get_input_pending should read the input.
4695 So this should not be needed. */
4696 /* If we are using polling for input,
4697 and we see input available, make it get read now.
4698 Otherwise it might not actually get read for a second.
4699 And on hpux, since we turn off polling in wait_reading_process_output,
4700 it might never get read at all if we don't spend much time
4701 outside of wait_reading_process_output. */
4702 if (read_kbd
&& interrupt_input
4703 && keyboard_bit_set (&Available
)
4704 && input_polling_used ())
4705 kill (getpid (), SIGALRM
);
4708 /* Check for keyboard input */
4709 /* If there is any, return immediately
4710 to give it higher priority than subprocesses */
4714 int old_timers_run
= timers_run
;
4715 struct buffer
*old_buffer
= current_buffer
;
4718 if (detect_input_pending_run_timers (do_display
))
4720 swallow_events (do_display
);
4721 if (detect_input_pending_run_timers (do_display
))
4725 /* If a timer has run, this might have changed buffers
4726 an alike. Make read_key_sequence aware of that. */
4727 if (timers_run
!= old_timers_run
4728 && waiting_for_user_input_p
== -1
4729 && old_buffer
!= current_buffer
)
4730 record_asynch_buffer_change ();
4736 /* If there is unread keyboard input, also return. */
4738 && requeued_events_pending_p ())
4741 /* If we are not checking for keyboard input now,
4742 do process events (but don't run any timers).
4743 This is so that X events will be processed.
4744 Otherwise they may have to wait until polling takes place.
4745 That would causes delays in pasting selections, for example.
4747 (We used to do this only if wait_for_cell.) */
4748 if (read_kbd
== 0 && detect_input_pending ())
4750 swallow_events (do_display
);
4751 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4752 if (detect_input_pending ())
4757 /* Exit now if the cell we're waiting for became non-nil. */
4758 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4762 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4763 go read it. This can happen with X on BSD after logging out.
4764 In that case, there really is no input and no SIGIO,
4765 but select says there is input. */
4767 if (read_kbd
&& interrupt_input
4768 && keyboard_bit_set (&Available
) && ! noninteractive
)
4769 kill (getpid (), SIGIO
);
4773 got_some_input
|= nfds
> 0;
4775 /* If checking input just got us a size-change event from X,
4776 obey it now if we should. */
4777 if (read_kbd
|| ! NILP (wait_for_cell
))
4778 do_pending_window_change (0);
4780 /* Check for data from a process. */
4781 if (no_avail
|| nfds
== 0)
4784 /* Really FIRST_PROC_DESC should be 0 on Unix,
4785 but this is safer in the short run. */
4786 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4788 if (FD_ISSET (channel
, &Available
)
4789 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4793 /* If waiting for this channel, arrange to return as
4794 soon as no more input to be processed. No more
4796 if (wait_channel
== channel
)
4802 proc
= chan_process
[channel
];
4806 /* If this is a server stream socket, accept connection. */
4807 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4809 server_accept_connection (proc
, channel
);
4813 /* Read data from the process, starting with our
4814 buffered-ahead character if we have one. */
4816 nread
= read_process_output (proc
, channel
);
4819 /* Since read_process_output can run a filter,
4820 which can call accept-process-output,
4821 don't try to read from any other processes
4822 before doing the select again. */
4823 FD_ZERO (&Available
);
4826 redisplay_preserve_echo_area (12);
4829 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4832 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4833 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4835 else if (nread
== -1 && errno
== EAGAIN
)
4839 else if (nread
== -1 && errno
== EAGAIN
)
4841 /* Note that we cannot distinguish between no input
4842 available now and a closed pipe.
4843 With luck, a closed pipe will be accompanied by
4844 subprocess termination and SIGCHLD. */
4845 else if (nread
== 0 && !NETCONN_P (proc
))
4847 #endif /* O_NDELAY */
4848 #endif /* O_NONBLOCK */
4850 /* On some OSs with ptys, when the process on one end of
4851 a pty exits, the other end gets an error reading with
4852 errno = EIO instead of getting an EOF (0 bytes read).
4853 Therefore, if we get an error reading and errno =
4854 EIO, just continue, because the child process has
4855 exited and should clean itself up soon (e.g. when we
4858 However, it has been known to happen that the SIGCHLD
4859 got lost. So raise the signal again just in case.
4861 else if (nread
== -1 && errno
== EIO
)
4863 /* Clear the descriptor now, so we only raise the signal once. */
4864 FD_CLR (channel
, &input_wait_mask
);
4865 FD_CLR (channel
, &non_keyboard_wait_mask
);
4867 kill (getpid (), SIGCHLD
);
4869 #endif /* HAVE_PTYS */
4870 /* If we can detect process termination, don't consider the process
4871 gone just because its pipe is closed. */
4873 else if (nread
== 0 && !NETCONN_P (proc
))
4878 /* Preserve status of processes already terminated. */
4879 XPROCESS (proc
)->tick
= ++process_tick
;
4880 deactivate_process (proc
);
4881 if (XPROCESS (proc
)->raw_status_new
)
4882 update_status (XPROCESS (proc
));
4883 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4884 XPROCESS (proc
)->status
4885 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4888 #ifdef NON_BLOCKING_CONNECT
4889 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4890 && FD_ISSET (channel
, &connect_wait_mask
))
4892 struct Lisp_Process
*p
;
4894 FD_CLR (channel
, &connect_wait_mask
);
4895 if (--num_pending_connects
< 0)
4898 proc
= chan_process
[channel
];
4902 p
= XPROCESS (proc
);
4905 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4906 So only use it on systems where it is known to work. */
4908 int xlen
= sizeof(xerrno
);
4909 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4914 struct sockaddr pname
;
4915 int pnamelen
= sizeof(pname
);
4917 /* If connection failed, getpeername will fail. */
4919 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4921 /* Obtain connect failure code through error slippage. */
4924 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4931 p
->tick
= ++process_tick
;
4932 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4933 deactivate_process (proc
);
4938 /* Execute the sentinel here. If we had relied on
4939 status_notify to do it later, it will read input
4940 from the process before calling the sentinel. */
4941 exec_sentinel (proc
, build_string ("open\n"));
4942 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4944 FD_SET (p
->infd
, &input_wait_mask
);
4945 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4949 #endif /* NON_BLOCKING_CONNECT */
4950 } /* end for each file descriptor */
4951 } /* end while exit conditions not met */
4953 unbind_to (count
, Qnil
);
4955 /* If calling from keyboard input, do not quit
4956 since we want to return C-g as an input character.
4957 Otherwise, do pending quit if requested. */
4960 /* Prevent input_pending from remaining set if we quit. */
4961 clear_input_pending ();
4964 #ifdef POLL_INTERRUPTED_SYS_CALL
4965 /* AlainF 5-Jul-1996
4966 HP-UX 10.10 seems to have problems with signals coming in
4967 Causes "poll: interrupted system call" messages when Emacs is run
4969 Turn periodic alarms back on */
4971 #endif /* POLL_INTERRUPTED_SYS_CALL */
4973 return got_some_input
;
4976 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4979 read_process_output_call (fun_and_args
)
4980 Lisp_Object fun_and_args
;
4982 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4986 read_process_output_error_handler (error
)
4989 cmd_error_internal (error
, "error in process filter: ");
4991 update_echo_area ();
4992 Fsleep_for (make_number (2), Qnil
);
4996 /* Read pending output from the process channel,
4997 starting with our buffered-ahead character if we have one.
4998 Yield number of decoded characters read.
5000 This function reads at most 4096 characters.
5001 If you want to read all available subprocess output,
5002 you must call it repeatedly until it returns zero.
5004 The characters read are decoded according to PROC's coding-system
5008 read_process_output (proc
, channel
)
5010 register int channel
;
5012 register int nbytes
;
5014 register Lisp_Object outstream
;
5015 register struct buffer
*old
= current_buffer
;
5016 register struct Lisp_Process
*p
= XPROCESS (proc
);
5017 register int opoint
;
5018 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5019 int carryover
= p
->decoding_carryover
;
5023 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5025 vs
= get_vms_process_pointer (p
->pid
);
5029 return (0); /* Really weird if it does this */
5030 if (!(vs
->iosb
[0] & 1))
5031 return -1; /* I/O error */
5034 error ("Could not get VMS process pointer");
5035 chars
= vs
->inputBuffer
;
5036 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
5039 start_vms_process_read (vs
); /* Crank up the next read on the process */
5040 return 1; /* Nothing worth printing, say we got 1 */
5044 /* The data carried over in the previous decoding (which are at
5045 the tail of decoding buffer) should be prepended to the new
5046 data read to decode all together. */
5047 chars
= (char *) alloca (nbytes
+ carryover
);
5048 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
5049 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
5053 chars
= (char *) alloca (carryover
+ readmax
);
5055 /* See the comment above. */
5056 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
5058 #ifdef DATAGRAM_SOCKETS
5059 /* We have a working select, so proc_buffered_char is always -1. */
5060 if (DATAGRAM_CHAN_P (channel
))
5062 int len
= datagram_address
[channel
].len
;
5063 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5064 0, datagram_address
[channel
].sa
, &len
);
5068 if (proc_buffered_char
[channel
] < 0)
5070 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5071 #ifdef ADAPTIVE_READ_BUFFERING
5072 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5074 int delay
= p
->read_output_delay
;
5077 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5080 process_output_delay_count
++;
5081 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5084 else if (delay
> 0 && (nbytes
== readmax
))
5086 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5088 process_output_delay_count
--;
5090 p
->read_output_delay
= delay
;
5093 p
->read_output_skip
= 1;
5094 process_output_skip
= 1;
5101 chars
[carryover
] = proc_buffered_char
[channel
];
5102 proc_buffered_char
[channel
] = -1;
5103 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5107 nbytes
= nbytes
+ 1;
5109 #endif /* not VMS */
5111 p
->decoding_carryover
= 0;
5113 /* At this point, NBYTES holds number of bytes just received
5114 (including the one in proc_buffered_char[channel]). */
5117 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5119 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5122 /* Now set NBYTES how many bytes we must decode. */
5123 nbytes
+= carryover
;
5125 /* Read and dispose of the process output. */
5126 outstream
= p
->filter
;
5127 if (!NILP (outstream
))
5129 /* We inhibit quit here instead of just catching it so that
5130 hitting ^G when a filter happens to be running won't screw
5132 int count
= SPECPDL_INDEX ();
5133 Lisp_Object odeactivate
;
5134 Lisp_Object obuffer
, okeymap
;
5136 int outer_running_asynch_code
= running_asynch_code
;
5137 int waiting
= waiting_for_user_input_p
;
5139 /* No need to gcpro these, because all we do with them later
5140 is test them for EQness, and none of them should be a string. */
5141 odeactivate
= Vdeactivate_mark
;
5142 XSETBUFFER (obuffer
, current_buffer
);
5143 okeymap
= current_buffer
->keymap
;
5145 specbind (Qinhibit_quit
, Qt
);
5146 specbind (Qlast_nonmenu_event
, Qt
);
5148 /* In case we get recursively called,
5149 and we already saved the match data nonrecursively,
5150 save the same match data in safely recursive fashion. */
5151 if (outer_running_asynch_code
)
5154 /* Don't clobber the CURRENT match data, either! */
5155 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5156 restore_search_regs ();
5157 record_unwind_save_match_data ();
5158 Fset_match_data (tem
, Qt
);
5161 /* For speed, if a search happens within this code,
5162 save the match data in a special nonrecursive fashion. */
5163 running_asynch_code
= 1;
5165 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5167 Vlast_coding_system_used
= coding
->symbol
;
5168 /* A new coding system might be found. */
5169 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5171 p
->decode_coding_system
= coding
->symbol
;
5173 /* Don't call setup_coding_system for
5174 proc_decode_coding_system[channel] here. It is done in
5175 detect_coding called via decode_coding above. */
5177 /* If a coding system for encoding is not yet decided, we set
5178 it as the same as coding-system for decoding.
5180 But, before doing that we must check if
5181 proc_encode_coding_system[p->outfd] surely points to a
5182 valid memory because p->outfd will be changed once EOF is
5183 sent to the process. */
5184 if (NILP (p
->encode_coding_system
)
5185 && proc_encode_coding_system
[p
->outfd
])
5187 p
->encode_coding_system
= coding
->symbol
;
5188 setup_coding_system (coding
->symbol
,
5189 proc_encode_coding_system
[p
->outfd
]);
5190 if (proc_encode_coding_system
[p
->outfd
]->eol_type
5191 == CODING_EOL_UNDECIDED
)
5192 proc_encode_coding_system
[p
->outfd
]->eol_type
5197 carryover
= nbytes
- coding
->consumed
;
5201 if (SCHARS (p
->decoding_buf
) < carryover
)
5202 p
->decoding_buf
= make_uninit_string (carryover
);
5203 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5205 p
->decoding_carryover
= carryover
;
5206 /* Adjust the multibyteness of TEXT to that of the filter. */
5207 if (!p
->filter_multibyte
!= !STRING_MULTIBYTE (text
))
5208 text
= (STRING_MULTIBYTE (text
)
5209 ? Fstring_as_unibyte (text
)
5210 : Fstring_to_multibyte (text
));
5211 if (SBYTES (text
) > 0)
5212 internal_condition_case_1 (read_process_output_call
,
5214 Fcons (proc
, Fcons (text
, Qnil
))),
5215 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5216 read_process_output_error_handler
);
5218 /* If we saved the match data nonrecursively, restore it now. */
5219 restore_search_regs ();
5220 running_asynch_code
= outer_running_asynch_code
;
5222 /* Handling the process output should not deactivate the mark. */
5223 Vdeactivate_mark
= odeactivate
;
5225 /* Restore waiting_for_user_input_p as it was
5226 when we were called, in case the filter clobbered it. */
5227 waiting_for_user_input_p
= waiting
;
5229 #if 0 /* Call record_asynch_buffer_change unconditionally,
5230 because we might have changed minor modes or other things
5231 that affect key bindings. */
5232 if (! EQ (Fcurrent_buffer (), obuffer
)
5233 || ! EQ (current_buffer
->keymap
, okeymap
))
5235 /* But do it only if the caller is actually going to read events.
5236 Otherwise there's no need to make him wake up, and it could
5237 cause trouble (for example it would make sit_for return). */
5238 if (waiting_for_user_input_p
== -1)
5239 record_asynch_buffer_change ();
5242 start_vms_process_read (vs
);
5244 unbind_to (count
, Qnil
);
5248 /* If no filter, write into buffer if it isn't dead. */
5249 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
5251 Lisp_Object old_read_only
;
5252 int old_begv
, old_zv
;
5253 int old_begv_byte
, old_zv_byte
;
5254 Lisp_Object odeactivate
;
5255 int before
, before_byte
;
5260 odeactivate
= Vdeactivate_mark
;
5262 Fset_buffer (p
->buffer
);
5264 opoint_byte
= PT_BYTE
;
5265 old_read_only
= current_buffer
->read_only
;
5268 old_begv_byte
= BEGV_BYTE
;
5269 old_zv_byte
= ZV_BYTE
;
5271 current_buffer
->read_only
= Qnil
;
5273 /* Insert new output into buffer
5274 at the current end-of-output marker,
5275 thus preserving logical ordering of input and output. */
5276 if (XMARKER (p
->mark
)->buffer
)
5277 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5278 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5281 SET_PT_BOTH (ZV
, ZV_BYTE
);
5283 before_byte
= PT_BYTE
;
5285 /* If the output marker is outside of the visible region, save
5286 the restriction and widen. */
5287 if (! (BEGV
<= PT
&& PT
<= ZV
))
5290 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5292 Vlast_coding_system_used
= coding
->symbol
;
5293 /* A new coding system might be found. See the comment in the
5294 similar code in the previous `if' block. */
5295 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5297 p
->decode_coding_system
= coding
->symbol
;
5298 if (NILP (p
->encode_coding_system
)
5299 && proc_encode_coding_system
[p
->outfd
])
5301 p
->encode_coding_system
= coding
->symbol
;
5302 setup_coding_system (coding
->symbol
,
5303 proc_encode_coding_system
[p
->outfd
]);
5304 if (proc_encode_coding_system
[p
->outfd
]->eol_type
5305 == CODING_EOL_UNDECIDED
)
5306 proc_encode_coding_system
[p
->outfd
]->eol_type
5310 carryover
= nbytes
- coding
->consumed
;
5314 if (SCHARS (p
->decoding_buf
) < carryover
)
5315 p
->decoding_buf
= make_uninit_string (carryover
);
5316 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5318 p
->decoding_carryover
= carryover
;
5320 /* Adjust the multibyteness of TEXT to that of the buffer. */
5321 if (NILP (current_buffer
->enable_multibyte_characters
)
5322 != ! STRING_MULTIBYTE (text
))
5323 text
= (STRING_MULTIBYTE (text
)
5324 ? Fstring_as_unibyte (text
)
5325 : Fstring_to_multibyte (text
));
5326 /* Insert before markers in case we are inserting where
5327 the buffer's mark is, and the user's next command is Meta-y. */
5328 insert_from_string_before_markers (text
, 0, 0,
5329 SCHARS (text
), SBYTES (text
), 0);
5331 /* Make sure the process marker's position is valid when the
5332 process buffer is changed in the signal_after_change above.
5333 W3 is known to do that. */
5334 if (BUFFERP (p
->buffer
)
5335 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5336 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5338 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5340 update_mode_lines
++;
5342 /* Make sure opoint and the old restrictions
5343 float ahead of any new text just as point would. */
5344 if (opoint
>= before
)
5346 opoint
+= PT
- before
;
5347 opoint_byte
+= PT_BYTE
- before_byte
;
5349 if (old_begv
> before
)
5351 old_begv
+= PT
- before
;
5352 old_begv_byte
+= PT_BYTE
- before_byte
;
5354 if (old_zv
>= before
)
5356 old_zv
+= PT
- before
;
5357 old_zv_byte
+= PT_BYTE
- before_byte
;
5360 /* If the restriction isn't what it should be, set it. */
5361 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5362 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5364 /* Handling the process output should not deactivate the mark. */
5365 Vdeactivate_mark
= odeactivate
;
5367 current_buffer
->read_only
= old_read_only
;
5368 SET_PT_BOTH (opoint
, opoint_byte
);
5369 set_buffer_internal (old
);
5372 start_vms_process_read (vs
);
5377 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5379 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5380 This is intended for use by asynchronous process output filters and sentinels. */)
5383 return (waiting_for_user_input_p
? Qt
: Qnil
);
5386 /* Sending data to subprocess */
5388 jmp_buf send_process_frame
;
5389 Lisp_Object process_sent_to
;
5392 send_process_trap ()
5394 SIGNAL_THREAD_CHECK (SIGPIPE
);
5399 sigunblock (sigmask (SIGPIPE
));
5400 longjmp (send_process_frame
, 1);
5403 /* Send some data to process PROC.
5404 BUF is the beginning of the data; LEN is the number of characters.
5405 OBJECT is the Lisp object that the data comes from. If OBJECT is
5406 nil or t, it means that the data comes from C string.
5408 If OBJECT is not nil, the data is encoded by PROC's coding-system
5409 for encoding before it is sent.
5411 This function can evaluate Lisp code and can garbage collect. */
5414 send_process (proc
, buf
, len
, object
)
5415 volatile Lisp_Object proc
;
5416 unsigned char *volatile buf
;
5418 volatile Lisp_Object object
;
5420 /* Use volatile to protect variables from being clobbered by longjmp. */
5421 struct Lisp_Process
*p
= XPROCESS (proc
);
5423 struct coding_system
*coding
;
5424 struct gcpro gcpro1
;
5425 SIGTYPE (*volatile old_sigpipe
) ();
5430 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5433 if (p
->raw_status_new
)
5435 if (! EQ (p
->status
, Qrun
))
5436 error ("Process %s not running", SDATA (p
->name
));
5438 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5440 coding
= proc_encode_coding_system
[p
->outfd
];
5441 Vlast_coding_system_used
= coding
->symbol
;
5443 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5444 || (BUFFERP (object
)
5445 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5448 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5449 /* The coding system for encoding was changed to raw-text
5450 because we sent a unibyte text previously. Now we are
5451 sending a multibyte text, thus we must encode it by the
5452 original coding system specified for the current process. */
5453 setup_coding_system (p
->encode_coding_system
, coding
);
5454 if (coding
->eol_type
== CODING_EOL_UNDECIDED
)
5455 coding
->eol_type
= system_eol_type
;
5456 /* src_multibyte should be set to 1 _after_ a call to
5457 setup_coding_system, since it resets src_multibyte to
5459 coding
->src_multibyte
= 1;
5463 /* For sending a unibyte text, character code conversion should
5464 not take place but EOL conversion should. So, setup raw-text
5465 or one of the subsidiary if we have not yet done it. */
5466 if (coding
->type
!= coding_type_raw_text
)
5468 if (CODING_REQUIRE_FLUSHING (coding
))
5470 /* But, before changing the coding, we must flush out data. */
5471 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5472 send_process (proc
, "", 0, Qt
);
5474 coding
->src_multibyte
= 0;
5475 setup_raw_text_coding_system (coding
);
5478 coding
->dst_multibyte
= 0;
5480 if (CODING_REQUIRE_ENCODING (coding
))
5482 int require
= encoding_buffer_size (coding
, len
);
5483 int from_byte
= -1, from
= -1, to
= -1;
5485 if (BUFFERP (object
))
5487 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5488 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5489 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5491 else if (STRINGP (object
))
5493 from_byte
= buf
- SDATA (object
);
5494 from
= string_byte_to_char (object
, from_byte
);
5495 to
= string_byte_to_char (object
, from_byte
+ len
);
5498 if (coding
->composing
!= COMPOSITION_DISABLED
)
5501 coding_save_composition (coding
, from
, to
, object
);
5503 coding
->composing
= COMPOSITION_DISABLED
;
5506 if (SBYTES (p
->encoding_buf
) < require
)
5507 p
->encoding_buf
= make_uninit_string (require
);
5510 buf
= (BUFFERP (object
)
5511 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5512 : SDATA (object
) + from_byte
);
5514 object
= p
->encoding_buf
;
5515 encode_coding (coding
, (char *) buf
, SDATA (object
),
5516 len
, SBYTES (object
));
5517 coding_free_composition_data (coding
);
5518 len
= coding
->produced
;
5519 buf
= SDATA (object
);
5523 vs
= get_vms_process_pointer (p
->pid
);
5525 error ("Could not find this process: %x", p
->pid
);
5526 else if (write_to_vms_process (vs
, buf
, len
))
5530 if (pty_max_bytes
== 0)
5532 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5533 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5534 if (pty_max_bytes
< 0)
5535 pty_max_bytes
= 250;
5537 pty_max_bytes
= 250;
5539 /* Deduct one, to leave space for the eof. */
5543 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5544 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5545 when returning with longjmp despite being declared volatile. */
5546 if (!setjmp (send_process_frame
))
5548 process_sent_to
= proc
;
5553 /* Decide how much data we can send in one batch.
5554 Long lines need to be split into multiple batches. */
5557 /* Starting this at zero is always correct when not the first
5558 iteration because the previous iteration ended by sending C-d.
5559 It may not be correct for the first iteration
5560 if a partial line was sent in a separate send_process call.
5561 If that proves worth handling, we need to save linepos
5562 in the process object. */
5564 unsigned char *ptr
= (unsigned char *) buf
;
5565 unsigned char *end
= (unsigned char *) buf
+ len
;
5567 /* Scan through this text for a line that is too long. */
5568 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5576 /* If we found one, break the line there
5577 and put in a C-d to force the buffer through. */
5581 /* Send this batch, using one or more write calls. */
5584 int outfd
= p
->outfd
;
5585 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5586 #ifdef DATAGRAM_SOCKETS
5587 if (DATAGRAM_CHAN_P (outfd
))
5589 rv
= sendto (outfd
, (char *) buf
, this,
5590 0, datagram_address
[outfd
].sa
,
5591 datagram_address
[outfd
].len
);
5592 if (rv
< 0 && errno
== EMSGSIZE
)
5594 signal (SIGPIPE
, old_sigpipe
);
5595 report_file_error ("sending datagram",
5596 Fcons (proc
, Qnil
));
5602 rv
= emacs_write (outfd
, (char *) buf
, this);
5603 #ifdef ADAPTIVE_READ_BUFFERING
5604 if (p
->read_output_delay
> 0
5605 && p
->adaptive_read_buffering
== 1)
5607 p
->read_output_delay
= 0;
5608 process_output_delay_count
--;
5609 p
->read_output_skip
= 0;
5613 signal (SIGPIPE
, old_sigpipe
);
5619 || errno
== EWOULDBLOCK
5625 /* Buffer is full. Wait, accepting input;
5626 that may allow the program
5627 to finish doing output and read more. */
5631 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5632 /* A gross hack to work around a bug in FreeBSD.
5633 In the following sequence, read(2) returns
5637 write(2) 954 bytes, get EAGAIN
5638 read(2) 1024 bytes in process_read_output
5639 read(2) 11 bytes in process_read_output
5641 That is, read(2) returns more bytes than have
5642 ever been written successfully. The 1033 bytes
5643 read are the 1022 bytes written successfully
5644 after processing (for example with CRs added if
5645 the terminal is set up that way which it is
5646 here). The same bytes will be seen again in a
5647 later read(2), without the CRs. */
5649 if (errno
== EAGAIN
)
5652 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5654 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5656 /* Running filters might relocate buffers or strings.
5657 Arrange to relocate BUF. */
5658 if (BUFFERP (object
))
5659 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5660 else if (STRINGP (object
))
5661 offset
= buf
- SDATA (object
);
5663 #ifdef EMACS_HAS_USECS
5664 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5666 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5669 if (BUFFERP (object
))
5670 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5671 else if (STRINGP (object
))
5672 buf
= offset
+ SDATA (object
);
5677 /* This is a real error. */
5678 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5685 /* If we sent just part of the string, put in an EOF
5686 to force it through, before we send the rest. */
5688 Fprocess_send_eof (proc
);
5691 #endif /* not VMS */
5694 signal (SIGPIPE
, old_sigpipe
);
5696 proc
= process_sent_to
;
5697 p
= XPROCESS (proc
);
5699 p
->raw_status_new
= 0;
5700 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5701 p
->tick
= ++process_tick
;
5702 deactivate_process (proc
);
5704 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5706 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5714 send_process_object_unwind (buf
)
5719 if (XBUFFER (buf
) == current_buffer
)
5721 tembuf
= Fcurrent_buffer ();
5723 Fkill_buffer (tembuf
);
5727 /* Send current contents of region between START and END to PROC.
5728 If START is a string, send it instead.
5729 This function can evaluate Lisp code and can garbage collect. */
5732 send_process_object (proc
, start
, end
)
5733 Lisp_Object proc
, start
, end
;
5735 int count
= SPECPDL_INDEX ();
5736 Lisp_Object object
= STRINGP (start
) ? start
: Fcurrent_buffer ();
5737 struct buffer
*given_buffer
= current_buffer
;
5741 record_unwind_protect (send_process_object_unwind
, Fcurrent_buffer ());
5743 if (STRINGP (object
) ? STRING_MULTIBYTE (object
)
5744 : ! NILP (XBUFFER (object
)->enable_multibyte_characters
))
5746 struct Lisp_Process
*p
= XPROCESS (proc
);
5747 struct coding_system
*coding
;
5749 if (p
->raw_status_new
)
5751 if (! EQ (p
->status
, Qrun
))
5752 error ("Process %s not running", SDATA (p
->name
));
5754 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5756 coding
= proc_encode_coding_system
[p
->outfd
];
5757 if (! EQ (coding
->symbol
, p
->encode_coding_system
))
5758 /* The coding system for encoding was changed to raw-text
5759 because we sent a unibyte text previously. Now we are
5760 sending a multibyte text, thus we must encode it by the
5761 original coding system specified for the current process. */
5762 setup_coding_system (p
->encode_coding_system
, coding
);
5763 if (! NILP (coding
->pre_write_conversion
))
5765 struct gcpro gcpro1
, gcpro2
;
5767 GCPRO2 (proc
, object
);
5768 call2 (coding
->pre_write_conversion
, start
, end
);
5770 if (given_buffer
!= current_buffer
)
5772 start
= make_number (BEGV
), end
= make_number (ZV
);
5773 object
= Fcurrent_buffer ();
5778 if (BUFFERP (object
))
5780 EMACS_INT start_byte
;
5782 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5783 move_gap (XINT (end
));
5784 start_byte
= CHAR_TO_BYTE (XINT (start
));
5785 buf
= BYTE_POS_ADDR (start_byte
);
5786 len
= CHAR_TO_BYTE (XINT (end
)) - start_byte
;
5790 buf
= SDATA (object
);
5791 len
= SBYTES (object
);
5793 send_process (proc
, buf
, len
, object
);
5795 unbind_to (count
, Qnil
);
5798 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5800 doc
: /* Send current contents of region as input to PROCESS.
5801 PROCESS may be a process, a buffer, the name of a process or buffer, or
5802 nil, indicating the current buffer's process.
5803 Called from program, takes three arguments, PROCESS, START and END.
5804 If the region is more than 500 characters long,
5805 it is sent in several bunches. This may happen even for shorter regions.
5806 Output from processes can arrive in between bunches. */)
5807 (process
, start
, end
)
5808 Lisp_Object process
, start
, end
;
5812 proc
= get_process (process
);
5813 validate_region (&start
, &end
);
5814 send_process_object (proc
, start
, end
);
5818 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5820 doc
: /* Send PROCESS the contents of STRING as input.
5821 PROCESS may be a process, a buffer, the name of a process or buffer, or
5822 nil, indicating the current buffer's process.
5823 If STRING is more than 500 characters long,
5824 it is sent in several bunches. This may happen even for shorter strings.
5825 Output from processes can arrive in between bunches. */)
5827 Lisp_Object process
, string
;
5830 CHECK_STRING (string
);
5831 proc
= get_process (process
);
5832 send_process_object (proc
, string
, Qnil
);
5836 /* Return the foreground process group for the tty/pty that
5837 the process P uses. */
5839 emacs_get_tty_pgrp (p
)
5840 struct Lisp_Process
*p
;
5845 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5848 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5849 master side. Try the slave side. */
5850 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5854 ioctl (fd
, TIOCGPGRP
, &gid
);
5858 #endif /* defined (TIOCGPGRP ) */
5863 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5864 Sprocess_running_child_p
, 0, 1, 0,
5865 doc
: /* Return t if PROCESS has given the terminal to a child.
5866 If the operating system does not make it possible to find out,
5867 return t unconditionally. */)
5869 Lisp_Object process
;
5871 /* Initialize in case ioctl doesn't exist or gives an error,
5872 in a way that will cause returning t. */
5875 struct Lisp_Process
*p
;
5877 proc
= get_process (process
);
5878 p
= XPROCESS (proc
);
5880 if (!EQ (p
->childp
, Qt
))
5881 error ("Process %s is not a subprocess",
5884 error ("Process %s is not active",
5887 gid
= emacs_get_tty_pgrp (p
);
5894 /* send a signal number SIGNO to PROCESS.
5895 If CURRENT_GROUP is t, that means send to the process group
5896 that currently owns the terminal being used to communicate with PROCESS.
5897 This is used for various commands in shell mode.
5898 If CURRENT_GROUP is lambda, that means send to the process group
5899 that currently owns the terminal, but only if it is NOT the shell itself.
5901 If NOMSG is zero, insert signal-announcements into process's buffers
5904 If we can, we try to signal PROCESS by sending control characters
5905 down the pty. This allows us to signal inferiors who have changed
5906 their uid, for which killpg would return an EPERM error. */
5909 process_send_signal (process
, signo
, current_group
, nomsg
)
5910 Lisp_Object process
;
5912 Lisp_Object current_group
;
5916 register struct Lisp_Process
*p
;
5920 proc
= get_process (process
);
5921 p
= XPROCESS (proc
);
5923 if (!EQ (p
->childp
, Qt
))
5924 error ("Process %s is not a subprocess",
5927 error ("Process %s is not active",
5931 current_group
= Qnil
;
5933 /* If we are using pgrps, get a pgrp number and make it negative. */
5934 if (NILP (current_group
))
5935 /* Send the signal to the shell's process group. */
5939 #ifdef SIGNALS_VIA_CHARACTERS
5940 /* If possible, send signals to the entire pgrp
5941 by sending an input character to it. */
5943 /* TERMIOS is the latest and bestest, and seems most likely to
5944 work. If the system has it, use it. */
5947 cc_t
*sig_char
= NULL
;
5949 tcgetattr (p
->infd
, &t
);
5954 sig_char
= &t
.c_cc
[VINTR
];
5958 sig_char
= &t
.c_cc
[VQUIT
];
5962 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5963 sig_char
= &t
.c_cc
[VSWTCH
];
5965 sig_char
= &t
.c_cc
[VSUSP
];
5970 if (sig_char
&& *sig_char
!= CDISABLE
)
5972 send_process (proc
, sig_char
, 1, Qnil
);
5975 /* If we can't send the signal with a character,
5976 fall through and send it another way. */
5977 #else /* ! HAVE_TERMIOS */
5979 /* On Berkeley descendants, the following IOCTL's retrieve the
5980 current control characters. */
5981 #if defined (TIOCGLTC) && defined (TIOCGETC)
5989 ioctl (p
->infd
, TIOCGETC
, &c
);
5990 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5993 ioctl (p
->infd
, TIOCGETC
, &c
);
5994 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5998 ioctl (p
->infd
, TIOCGLTC
, &lc
);
5999 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
6001 #endif /* ! defined (SIGTSTP) */
6004 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6006 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
6013 ioctl (p
->infd
, TCGETA
, &t
);
6014 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
6017 ioctl (p
->infd
, TCGETA
, &t
);
6018 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
6022 ioctl (p
->infd
, TCGETA
, &t
);
6023 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
6025 #endif /* ! defined (SIGTSTP) */
6027 #else /* ! defined (TCGETA) */
6028 Your configuration files are messed up
.
6029 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
6030 you'd better be using one of the alternatives above! */
6031 #endif /* ! defined (TCGETA) */
6032 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6033 /* In this case, the code above should alway returns. */
6035 #endif /* ! defined HAVE_TERMIOS */
6037 /* The code above may fall through if it can't
6038 handle the signal. */
6039 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6042 /* Get the current pgrp using the tty itself, if we have that.
6043 Otherwise, use the pty to get the pgrp.
6044 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6045 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6046 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6047 His patch indicates that if TIOCGPGRP returns an error, then
6048 we should just assume that p->pid is also the process group id. */
6050 gid
= emacs_get_tty_pgrp (p
);
6053 /* If we can't get the information, assume
6054 the shell owns the tty. */
6057 /* It is not clear whether anything really can set GID to -1.
6058 Perhaps on some system one of those ioctls can or could do so.
6059 Or perhaps this is vestigial. */
6062 #else /* ! defined (TIOCGPGRP ) */
6063 /* Can't select pgrps on this system, so we know that
6064 the child itself heads the pgrp. */
6066 #endif /* ! defined (TIOCGPGRP ) */
6068 /* If current_group is lambda, and the shell owns the terminal,
6069 don't send any signal. */
6070 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6078 p
->raw_status_new
= 0;
6080 p
->tick
= ++process_tick
;
6082 status_notify (NULL
);
6084 #endif /* ! defined (SIGCONT) */
6087 send_process (proc
, "\003", 1, Qnil
); /* ^C */
6092 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
6097 sys$
forcex (&(p
->pid
), 0, 1);
6100 flush_pending_output (p
->infd
);
6104 /* If we don't have process groups, send the signal to the immediate
6105 subprocess. That isn't really right, but it's better than any
6106 obvious alternative. */
6109 kill (p
->pid
, signo
);
6113 /* gid may be a pid, or minus a pgrp's number */
6115 if (!NILP (current_group
))
6117 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6118 EMACS_KILLPG (gid
, signo
);
6125 #else /* ! defined (TIOCSIGSEND) */
6126 EMACS_KILLPG (gid
, signo
);
6127 #endif /* ! defined (TIOCSIGSEND) */
6130 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6131 doc
: /* Interrupt process PROCESS.
6132 PROCESS may be a process, a buffer, or the name of a process or buffer.
6133 No arg or nil means current buffer's process.
6134 Second arg CURRENT-GROUP non-nil means send signal to
6135 the current process-group of the process's controlling terminal
6136 rather than to the process's own process group.
6137 If the process is a shell, this means interrupt current subjob
6138 rather than the shell.
6140 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6141 don't send the signal. */)
6142 (process
, current_group
)
6143 Lisp_Object process
, current_group
;
6145 process_send_signal (process
, SIGINT
, current_group
, 0);
6149 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6150 doc
: /* Kill process PROCESS. May be process or name of one.
6151 See function `interrupt-process' for more details on usage. */)
6152 (process
, current_group
)
6153 Lisp_Object process
, current_group
;
6155 process_send_signal (process
, SIGKILL
, current_group
, 0);
6159 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6160 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6161 See function `interrupt-process' for more details on usage. */)
6162 (process
, current_group
)
6163 Lisp_Object process
, current_group
;
6165 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6169 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6170 doc
: /* Stop process PROCESS. May be process or name of one.
6171 See function `interrupt-process' for more details on usage.
6172 If PROCESS is a network process, inhibit handling of incoming traffic. */)
6173 (process
, current_group
)
6174 Lisp_Object process
, current_group
;
6177 if (PROCESSP (process
) && NETCONN_P (process
))
6179 struct Lisp_Process
*p
;
6181 p
= XPROCESS (process
);
6182 if (NILP (p
->command
)
6185 FD_CLR (p
->infd
, &input_wait_mask
);
6186 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6193 error ("No SIGTSTP support");
6195 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6200 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6201 doc
: /* Continue process PROCESS. May be process or name of one.
6202 See function `interrupt-process' for more details on usage.
6203 If PROCESS is a network process, resume handling of incoming traffic. */)
6204 (process
, current_group
)
6205 Lisp_Object process
, current_group
;
6208 if (PROCESSP (process
) && NETCONN_P (process
))
6210 struct Lisp_Process
*p
;
6212 p
= XPROCESS (process
);
6213 if (EQ (p
->command
, Qt
)
6215 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6217 FD_SET (p
->infd
, &input_wait_mask
);
6218 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6225 process_send_signal (process
, SIGCONT
, current_group
, 0);
6227 error ("No SIGCONT support");
6232 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6233 2, 2, "sProcess (name or number): \nnSignal code: ",
6234 doc
: /* Send PROCESS the signal with code SIGCODE.
6235 PROCESS may also be a number specifying the process id of the
6236 process to signal; in this case, the process need not be a child of
6238 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6240 Lisp_Object process
, sigcode
;
6244 if (INTEGERP (process
))
6246 pid
= XINT (process
);
6250 if (FLOATP (process
))
6252 pid
= (pid_t
) XFLOAT_DATA (process
);
6256 if (STRINGP (process
))
6259 if (tem
= Fget_process (process
), NILP (tem
))
6261 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6268 process
= get_process (process
);
6273 CHECK_PROCESS (process
);
6274 pid
= XPROCESS (process
)->pid
;
6276 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6280 #define parse_signal(NAME, VALUE) \
6281 else if (!xstricmp (name, NAME)) \
6282 XSETINT (sigcode, VALUE)
6284 if (INTEGERP (sigcode
))
6288 unsigned char *name
;
6290 CHECK_SYMBOL (sigcode
);
6291 name
= SDATA (SYMBOL_NAME (sigcode
));
6293 if (!strncmp(name
, "SIG", 3) || !strncmp(name
, "sig", 3))
6299 parse_signal ("usr1", SIGUSR1
);
6302 parse_signal ("usr2", SIGUSR2
);
6305 parse_signal ("term", SIGTERM
);
6308 parse_signal ("hup", SIGHUP
);
6311 parse_signal ("int", SIGINT
);
6314 parse_signal ("quit", SIGQUIT
);
6317 parse_signal ("ill", SIGILL
);
6320 parse_signal ("abrt", SIGABRT
);
6323 parse_signal ("emt", SIGEMT
);
6326 parse_signal ("kill", SIGKILL
);
6329 parse_signal ("fpe", SIGFPE
);
6332 parse_signal ("bus", SIGBUS
);
6335 parse_signal ("segv", SIGSEGV
);
6338 parse_signal ("sys", SIGSYS
);
6341 parse_signal ("pipe", SIGPIPE
);
6344 parse_signal ("alrm", SIGALRM
);
6347 parse_signal ("urg", SIGURG
);
6350 parse_signal ("stop", SIGSTOP
);
6353 parse_signal ("tstp", SIGTSTP
);
6356 parse_signal ("cont", SIGCONT
);
6359 parse_signal ("chld", SIGCHLD
);
6362 parse_signal ("ttin", SIGTTIN
);
6365 parse_signal ("ttou", SIGTTOU
);
6368 parse_signal ("io", SIGIO
);
6371 parse_signal ("xcpu", SIGXCPU
);
6374 parse_signal ("xfsz", SIGXFSZ
);
6377 parse_signal ("vtalrm", SIGVTALRM
);
6380 parse_signal ("prof", SIGPROF
);
6383 parse_signal ("winch", SIGWINCH
);
6386 parse_signal ("info", SIGINFO
);
6389 error ("Undefined signal name %s", name
);
6394 return make_number (kill (pid
, XINT (sigcode
)));
6397 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6398 doc
: /* Make PROCESS see end-of-file in its input.
6399 EOF comes after any text already sent to it.
6400 PROCESS may be a process, a buffer, the name of a process or buffer, or
6401 nil, indicating the current buffer's process.
6402 If PROCESS is a network connection, or is a process communicating
6403 through a pipe (as opposed to a pty), then you cannot send any more
6404 text to PROCESS after you call this function. */)
6406 Lisp_Object process
;
6409 struct coding_system
*coding
;
6411 if (DATAGRAM_CONN_P (process
))
6414 proc
= get_process (process
);
6415 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6417 /* Make sure the process is really alive. */
6418 if (XPROCESS (proc
)->raw_status_new
)
6419 update_status (XPROCESS (proc
));
6420 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6421 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6423 if (CODING_REQUIRE_FLUSHING (coding
))
6425 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6426 send_process (proc
, "", 0, Qnil
);
6430 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6432 if (XPROCESS (proc
)->pty_flag
)
6433 send_process (proc
, "\004", 1, Qnil
);
6436 int old_outfd
, new_outfd
;
6438 #ifdef HAVE_SHUTDOWN
6439 /* If this is a network connection, or socketpair is used
6440 for communication with the subprocess, call shutdown to cause EOF.
6441 (In some old system, shutdown to socketpair doesn't work.
6442 Then we just can't win.) */
6443 if (XPROCESS (proc
)->pid
== 0
6444 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6445 shutdown (XPROCESS (proc
)->outfd
, 1);
6446 /* In case of socketpair, outfd == infd, so don't close it. */
6447 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6448 emacs_close (XPROCESS (proc
)->outfd
);
6449 #else /* not HAVE_SHUTDOWN */
6450 emacs_close (XPROCESS (proc
)->outfd
);
6451 #endif /* not HAVE_SHUTDOWN */
6452 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6455 old_outfd
= XPROCESS (proc
)->outfd
;
6457 if (!proc_encode_coding_system
[new_outfd
])
6458 proc_encode_coding_system
[new_outfd
]
6459 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6460 bcopy (proc_encode_coding_system
[old_outfd
],
6461 proc_encode_coding_system
[new_outfd
],
6462 sizeof (struct coding_system
));
6463 bzero (proc_encode_coding_system
[old_outfd
],
6464 sizeof (struct coding_system
));
6466 XPROCESS (proc
)->outfd
= new_outfd
;
6472 /* Kill all processes associated with `buffer'.
6473 If `buffer' is nil, kill all processes */
6476 kill_buffer_processes (buffer
)
6479 Lisp_Object tail
, proc
;
6481 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6483 proc
= XCDR (XCAR (tail
));
6484 if (GC_PROCESSP (proc
)
6485 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6487 if (NETCONN_P (proc
))
6488 Fdelete_process (proc
);
6489 else if (XPROCESS (proc
)->infd
>= 0)
6490 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6495 /* On receipt of a signal that a child status has changed, loop asking
6496 about children with changed statuses until the system says there
6499 All we do is change the status; we do not run sentinels or print
6500 notifications. That is saved for the next time keyboard input is
6501 done, in order to avoid timing errors.
6503 ** WARNING: this can be called during garbage collection.
6504 Therefore, it must not be fooled by the presence of mark bits in
6507 ** USG WARNING: Although it is not obvious from the documentation
6508 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6509 signal() before executing at least one wait(), otherwise the
6510 handler will be called again, resulting in an infinite loop. The
6511 relevant portion of the documentation reads "SIGCLD signals will be
6512 queued and the signal-catching function will be continually
6513 reentered until the queue is empty". Invoking signal() causes the
6514 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6517 ** Malloc WARNING: This should never call malloc either directly or
6518 indirectly; if it does, that is a bug */
6522 sigchld_handler (signo
)
6525 int old_errno
= errno
;
6527 register struct Lisp_Process
*p
;
6528 extern EMACS_TIME
*input_available_clear_time
;
6530 SIGNAL_THREAD_CHECK (signo
);
6534 sigheld
|= sigbit (SIGCHLD
);
6546 #endif /* no WUNTRACED */
6547 /* Keep trying to get a status until we get a definitive result. */
6551 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6553 while (pid
< 0 && errno
== EINTR
);
6557 /* PID == 0 means no processes found, PID == -1 means a real
6558 failure. We have done all our job, so return. */
6560 /* USG systems forget handlers when they are used;
6561 must reestablish each time */
6562 #if defined (USG) && !defined (POSIX_SIGNALS)
6563 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6566 sigheld
&= ~sigbit (SIGCHLD
);
6574 #endif /* no WNOHANG */
6576 /* Find the process that signaled us, and record its status. */
6578 /* The process can have been deleted by Fdelete_process. */
6579 for (tail
= deleted_pid_list
; GC_CONSP (tail
); tail
= XCDR (tail
))
6581 Lisp_Object xpid
= XCAR (tail
);
6582 if ((GC_INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6583 || (GC_FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6585 XSETCAR (tail
, Qnil
);
6586 goto sigchld_end_of_loop
;
6590 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6592 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6594 proc
= XCDR (XCAR (tail
));
6595 p
= XPROCESS (proc
);
6596 if (GC_EQ (p
->childp
, Qt
) && p
->pid
== pid
)
6601 /* Look for an asynchronous process whose pid hasn't been filled
6604 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6606 proc
= XCDR (XCAR (tail
));
6607 p
= XPROCESS (proc
);
6613 /* Change the status of the process that was found. */
6616 union { int i
; WAITTYPE wt
; } u
;
6617 int clear_desc_flag
= 0;
6619 p
->tick
= ++process_tick
;
6621 p
->raw_status
= u
.i
;
6622 p
->raw_status_new
= 1;
6624 /* If process has terminated, stop waiting for its output. */
6625 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6627 clear_desc_flag
= 1;
6629 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6630 if (clear_desc_flag
)
6632 FD_CLR (p
->infd
, &input_wait_mask
);
6633 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6636 /* Tell wait_reading_process_output that it needs to wake up and
6638 if (input_available_clear_time
)
6639 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6642 /* There was no asynchronous process found for that pid: we have
6643 a synchronous process. */
6646 synch_process_alive
= 0;
6648 /* Report the status of the synchronous process. */
6650 synch_process_retcode
= WRETCODE (w
);
6651 else if (WIFSIGNALED (w
))
6652 synch_process_termsig
= WTERMSIG (w
);
6654 /* Tell wait_reading_process_output that it needs to wake up and
6656 if (input_available_clear_time
)
6657 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6660 sigchld_end_of_loop
:
6663 /* On some systems, we must return right away.
6664 If any more processes want to signal us, we will
6666 Otherwise (on systems that have WNOHANG), loop around
6667 to use up all the processes that have something to tell us. */
6668 #if (defined WINDOWSNT \
6669 || (defined USG && !defined GNU_LINUX \
6670 && !(defined HPUX && defined WNOHANG)))
6671 #if defined (USG) && ! defined (POSIX_SIGNALS)
6672 signal (signo
, sigchld_handler
);
6676 #endif /* USG, but not HPUX with WNOHANG */
6679 #endif /* SIGCHLD */
6683 exec_sentinel_unwind (data
)
6686 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6691 exec_sentinel_error_handler (error
)
6694 cmd_error_internal (error
, "error in process sentinel: ");
6696 update_echo_area ();
6697 Fsleep_for (make_number (2), Qnil
);
6702 exec_sentinel (proc
, reason
)
6703 Lisp_Object proc
, reason
;
6705 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6706 register struct Lisp_Process
*p
= XPROCESS (proc
);
6707 int count
= SPECPDL_INDEX ();
6708 int outer_running_asynch_code
= running_asynch_code
;
6709 int waiting
= waiting_for_user_input_p
;
6711 if (inhibit_sentinels
)
6714 /* No need to gcpro these, because all we do with them later
6715 is test them for EQness, and none of them should be a string. */
6716 odeactivate
= Vdeactivate_mark
;
6717 XSETBUFFER (obuffer
, current_buffer
);
6718 okeymap
= current_buffer
->keymap
;
6720 sentinel
= p
->sentinel
;
6721 if (NILP (sentinel
))
6724 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6725 assure that it gets restored no matter how the sentinel exits. */
6727 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6728 /* Inhibit quit so that random quits don't screw up a running filter. */
6729 specbind (Qinhibit_quit
, Qt
);
6730 specbind (Qlast_nonmenu_event
, Qt
);
6732 /* In case we get recursively called,
6733 and we already saved the match data nonrecursively,
6734 save the same match data in safely recursive fashion. */
6735 if (outer_running_asynch_code
)
6738 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6739 restore_search_regs ();
6740 record_unwind_save_match_data ();
6741 Fset_match_data (tem
, Qt
);
6744 /* For speed, if a search happens within this code,
6745 save the match data in a special nonrecursive fashion. */
6746 running_asynch_code
= 1;
6748 internal_condition_case_1 (read_process_output_call
,
6750 Fcons (proc
, Fcons (reason
, Qnil
))),
6751 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6752 exec_sentinel_error_handler
);
6754 /* If we saved the match data nonrecursively, restore it now. */
6755 restore_search_regs ();
6756 running_asynch_code
= outer_running_asynch_code
;
6758 Vdeactivate_mark
= odeactivate
;
6760 /* Restore waiting_for_user_input_p as it was
6761 when we were called, in case the filter clobbered it. */
6762 waiting_for_user_input_p
= waiting
;
6765 if (! EQ (Fcurrent_buffer (), obuffer
)
6766 || ! EQ (current_buffer
->keymap
, okeymap
))
6768 /* But do it only if the caller is actually going to read events.
6769 Otherwise there's no need to make him wake up, and it could
6770 cause trouble (for example it would make sit_for return). */
6771 if (waiting_for_user_input_p
== -1)
6772 record_asynch_buffer_change ();
6774 unbind_to (count
, Qnil
);
6777 /* Report all recent events of a change in process status
6778 (either run the sentinel or output a message).
6779 This is usually done while Emacs is waiting for keyboard input
6780 but can be done at other times. */
6783 status_notify (deleting_process
)
6784 struct Lisp_Process
*deleting_process
;
6786 register Lisp_Object proc
, buffer
;
6787 Lisp_Object tail
, msg
;
6788 struct gcpro gcpro1
, gcpro2
;
6792 /* We need to gcpro tail; if read_process_output calls a filter
6793 which deletes a process and removes the cons to which tail points
6794 from Vprocess_alist, and then causes a GC, tail is an unprotected
6798 /* Set this now, so that if new processes are created by sentinels
6799 that we run, we get called again to handle their status changes. */
6800 update_tick
= process_tick
;
6802 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6805 register struct Lisp_Process
*p
;
6807 proc
= Fcdr (XCAR (tail
));
6808 p
= XPROCESS (proc
);
6810 if (p
->tick
!= p
->update_tick
)
6812 p
->update_tick
= p
->tick
;
6814 /* If process is still active, read any output that remains. */
6815 while (! EQ (p
->filter
, Qt
)
6816 && ! EQ (p
->status
, Qconnect
)
6817 && ! EQ (p
->status
, Qlisten
)
6818 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6820 && p
!= deleting_process
6821 && read_process_output (proc
, p
->infd
) > 0);
6825 /* Get the text to use for the message. */
6826 if (p
->raw_status_new
)
6828 msg
= status_message (p
);
6830 /* If process is terminated, deactivate it or delete it. */
6832 if (CONSP (p
->status
))
6833 symbol
= XCAR (p
->status
);
6835 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6836 || EQ (symbol
, Qclosed
))
6838 if (delete_exited_processes
)
6839 remove_process (proc
);
6841 deactivate_process (proc
);
6844 /* The actions above may have further incremented p->tick.
6845 So set p->update_tick again
6846 so that an error in the sentinel will not cause
6847 this code to be run again. */
6848 p
->update_tick
= p
->tick
;
6849 /* Now output the message suitably. */
6850 if (!NILP (p
->sentinel
))
6851 exec_sentinel (proc
, msg
);
6852 /* Don't bother with a message in the buffer
6853 when a process becomes runnable. */
6854 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6856 Lisp_Object ro
, tem
;
6857 struct buffer
*old
= current_buffer
;
6858 int opoint
, opoint_byte
;
6859 int before
, before_byte
;
6861 ro
= XBUFFER (buffer
)->read_only
;
6863 /* Avoid error if buffer is deleted
6864 (probably that's why the process is dead, too) */
6865 if (NILP (XBUFFER (buffer
)->name
))
6867 Fset_buffer (buffer
);
6870 opoint_byte
= PT_BYTE
;
6871 /* Insert new output into buffer
6872 at the current end-of-output marker,
6873 thus preserving logical ordering of input and output. */
6874 if (XMARKER (p
->mark
)->buffer
)
6875 Fgoto_char (p
->mark
);
6877 SET_PT_BOTH (ZV
, ZV_BYTE
);
6880 before_byte
= PT_BYTE
;
6882 tem
= current_buffer
->read_only
;
6883 current_buffer
->read_only
= Qnil
;
6884 insert_string ("\nProcess ");
6885 Finsert (1, &p
->name
);
6886 insert_string (" ");
6888 current_buffer
->read_only
= tem
;
6889 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6891 if (opoint
>= before
)
6892 SET_PT_BOTH (opoint
+ (PT
- before
),
6893 opoint_byte
+ (PT_BYTE
- before_byte
));
6895 SET_PT_BOTH (opoint
, opoint_byte
);
6897 set_buffer_internal (old
);
6902 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6903 redisplay_preserve_echo_area (13);
6909 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6910 Sset_process_coding_system
, 1, 3, 0,
6911 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6912 DECODING will be used to decode subprocess output and ENCODING to
6913 encode subprocess input. */)
6914 (process
, decoding
, encoding
)
6915 register Lisp_Object process
, decoding
, encoding
;
6917 register struct Lisp_Process
*p
;
6919 CHECK_PROCESS (process
);
6920 p
= XPROCESS (process
);
6922 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6924 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6925 Fcheck_coding_system (decoding
);
6926 Fcheck_coding_system (encoding
);
6928 p
->decode_coding_system
= decoding
;
6929 p
->encode_coding_system
= encoding
;
6930 setup_process_coding_systems (process
);
6935 DEFUN ("process-coding-system",
6936 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6937 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6939 register Lisp_Object process
;
6941 CHECK_PROCESS (process
);
6942 return Fcons (XPROCESS (process
)->decode_coding_system
,
6943 XPROCESS (process
)->encode_coding_system
);
6946 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6947 Sset_process_filter_multibyte
, 2, 2, 0,
6948 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6949 If FLAG is non-nil, the filter is given multibyte strings.
6950 If FLAG is nil, the filter is given unibyte strings. In this case,
6951 all character code conversion except for end-of-line conversion is
6954 Lisp_Object process
, flag
;
6956 register struct Lisp_Process
*p
;
6958 CHECK_PROCESS (process
);
6959 p
= XPROCESS (process
);
6960 p
->filter_multibyte
= !NILP (flag
);
6961 setup_process_coding_systems (process
);
6966 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6967 Sprocess_filter_multibyte_p
, 1, 1, 0,
6968 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6970 Lisp_Object process
;
6972 register struct Lisp_Process
*p
;
6974 CHECK_PROCESS (process
);
6975 p
= XPROCESS (process
);
6977 return (p
->filter_multibyte
? Qt
: Qnil
);
6982 /* Add DESC to the set of keyboard input descriptors. */
6985 add_keyboard_wait_descriptor (desc
)
6988 FD_SET (desc
, &input_wait_mask
);
6989 FD_SET (desc
, &non_process_wait_mask
);
6990 if (desc
> max_keyboard_desc
)
6991 max_keyboard_desc
= desc
;
6994 static int add_gpm_wait_descriptor_called_flag
;
6997 add_gpm_wait_descriptor (desc
)
7000 if (! add_gpm_wait_descriptor_called_flag
)
7001 FD_CLR (0, &input_wait_mask
);
7002 add_gpm_wait_descriptor_called_flag
= 1;
7003 FD_SET (desc
, &input_wait_mask
);
7004 FD_SET (desc
, &gpm_wait_mask
);
7005 if (desc
> max_gpm_desc
)
7006 max_gpm_desc
= desc
;
7009 /* From now on, do not expect DESC to give keyboard input. */
7012 delete_keyboard_wait_descriptor (desc
)
7016 int lim
= max_keyboard_desc
;
7018 FD_CLR (desc
, &input_wait_mask
);
7019 FD_CLR (desc
, &non_process_wait_mask
);
7021 if (desc
== max_keyboard_desc
)
7022 for (fd
= 0; fd
< lim
; fd
++)
7023 if (FD_ISSET (fd
, &input_wait_mask
)
7024 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7025 && !FD_ISSET (fd
, &gpm_wait_mask
))
7026 max_keyboard_desc
= fd
;
7030 delete_gpm_wait_descriptor (desc
)
7034 int lim
= max_gpm_desc
;
7036 FD_CLR (desc
, &input_wait_mask
);
7037 FD_CLR (desc
, &non_process_wait_mask
);
7039 if (desc
== max_gpm_desc
)
7040 for (fd
= 0; fd
< lim
; fd
++)
7041 if (FD_ISSET (fd
, &input_wait_mask
)
7042 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7043 && !FD_ISSET (fd
, &non_process_wait_mask
))
7047 /* Return nonzero if *MASK has a bit set
7048 that corresponds to one of the keyboard input descriptors. */
7051 keyboard_bit_set (mask
)
7056 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
7057 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7058 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7069 inhibit_sentinels
= 0;
7073 if (! noninteractive
|| initialized
)
7075 signal (SIGCHLD
, sigchld_handler
);
7078 FD_ZERO (&input_wait_mask
);
7079 FD_ZERO (&non_keyboard_wait_mask
);
7080 FD_ZERO (&non_process_wait_mask
);
7081 max_process_desc
= 0;
7083 #ifdef NON_BLOCKING_CONNECT
7084 FD_ZERO (&connect_wait_mask
);
7085 num_pending_connects
= 0;
7088 #ifdef ADAPTIVE_READ_BUFFERING
7089 process_output_delay_count
= 0;
7090 process_output_skip
= 0;
7093 /* Don't do this, it caused infinite select loops. The display
7094 method should call add_keyboard_wait_descriptor on stdin if it
7097 FD_SET (0, &input_wait_mask
);
7100 Vprocess_alist
= Qnil
;
7102 deleted_pid_list
= Qnil
;
7104 for (i
= 0; i
< MAXDESC
; i
++)
7106 chan_process
[i
] = Qnil
;
7107 proc_buffered_char
[i
] = -1;
7109 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
7110 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
7111 #ifdef DATAGRAM_SOCKETS
7112 bzero (datagram_address
, sizeof datagram_address
);
7117 Lisp_Object subfeatures
= Qnil
;
7118 struct socket_options
*sopt
;
7120 #define ADD_SUBFEATURE(key, val) \
7121 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
7123 #ifdef NON_BLOCKING_CONNECT
7124 ADD_SUBFEATURE (QCnowait
, Qt
);
7126 #ifdef DATAGRAM_SOCKETS
7127 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7129 #ifdef HAVE_LOCAL_SOCKETS
7130 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7132 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7134 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7136 #ifdef HAVE_GETSOCKNAME
7137 ADD_SUBFEATURE (QCservice
, Qt
);
7139 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
7140 ADD_SUBFEATURE (QCserver
, Qt
);
7143 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7144 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
7146 Fprovide (intern ("make-network-process"), subfeatures
);
7148 #endif /* HAVE_SOCKETS */
7150 #if defined (DARWIN) || defined (MAC_OSX)
7151 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7152 processes. As such, we only change the default value. */
7155 char *release
= get_operating_system_release();
7156 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7157 && release
[1] == '.')) {
7158 Vprocess_connection_type
= Qnil
;
7167 Qprocessp
= intern ("processp");
7168 staticpro (&Qprocessp
);
7169 Qrun
= intern ("run");
7171 Qstop
= intern ("stop");
7173 Qsignal
= intern ("signal");
7174 staticpro (&Qsignal
);
7176 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7179 Qexit = intern ("exit");
7180 staticpro (&Qexit); */
7182 Qopen
= intern ("open");
7184 Qclosed
= intern ("closed");
7185 staticpro (&Qclosed
);
7186 Qconnect
= intern ("connect");
7187 staticpro (&Qconnect
);
7188 Qfailed
= intern ("failed");
7189 staticpro (&Qfailed
);
7190 Qlisten
= intern ("listen");
7191 staticpro (&Qlisten
);
7192 Qlocal
= intern ("local");
7193 staticpro (&Qlocal
);
7194 Qipv4
= intern ("ipv4");
7197 Qipv6
= intern ("ipv6");
7200 Qdatagram
= intern ("datagram");
7201 staticpro (&Qdatagram
);
7203 QCname
= intern (":name");
7204 staticpro (&QCname
);
7205 QCbuffer
= intern (":buffer");
7206 staticpro (&QCbuffer
);
7207 QChost
= intern (":host");
7208 staticpro (&QChost
);
7209 QCservice
= intern (":service");
7210 staticpro (&QCservice
);
7211 QCtype
= intern (":type");
7212 staticpro (&QCtype
);
7213 QClocal
= intern (":local");
7214 staticpro (&QClocal
);
7215 QCremote
= intern (":remote");
7216 staticpro (&QCremote
);
7217 QCcoding
= intern (":coding");
7218 staticpro (&QCcoding
);
7219 QCserver
= intern (":server");
7220 staticpro (&QCserver
);
7221 QCnowait
= intern (":nowait");
7222 staticpro (&QCnowait
);
7223 QCsentinel
= intern (":sentinel");
7224 staticpro (&QCsentinel
);
7225 QClog
= intern (":log");
7227 QCnoquery
= intern (":noquery");
7228 staticpro (&QCnoquery
);
7229 QCstop
= intern (":stop");
7230 staticpro (&QCstop
);
7231 QCoptions
= intern (":options");
7232 staticpro (&QCoptions
);
7233 QCplist
= intern (":plist");
7234 staticpro (&QCplist
);
7235 QCfilter_multibyte
= intern (":filter-multibyte");
7236 staticpro (&QCfilter_multibyte
);
7238 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
7239 staticpro (&Qlast_nonmenu_event
);
7241 staticpro (&Vprocess_alist
);
7243 staticpro (&deleted_pid_list
);
7246 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
7247 doc
: /* *Non-nil means delete processes immediately when they exit.
7248 A value of nil means don't delete them until `list-processes' is run. */);
7250 delete_exited_processes
= 1;
7252 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
7253 doc
: /* Control type of device used to communicate with subprocesses.
7254 Values are nil to use a pipe, or t or `pty' to use a pty.
7255 The value has no effect if the system has no ptys or if all ptys are busy:
7256 then a pipe is used in any case.
7257 The value takes effect when `start-process' is called. */);
7258 Vprocess_connection_type
= Qt
;
7260 #ifdef ADAPTIVE_READ_BUFFERING
7261 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
7262 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7263 On some systems, when Emacs reads the output from a subprocess, the output data
7264 is read in very small blocks, potentially resulting in very poor performance.
7265 This behavior can be remedied to some extent by setting this variable to a
7266 non-nil value, as it will automatically delay reading from such processes, to
7267 allow them to produce more output before Emacs tries to read it.
7268 If the value is t, the delay is reset after each write to the process; any other
7269 non-nil value means that the delay is not reset on write.
7270 The variable takes effect when `start-process' is called. */);
7271 Vprocess_adaptive_read_buffering
= Qt
;
7274 defsubr (&Sprocessp
);
7275 defsubr (&Sget_process
);
7276 defsubr (&Sget_buffer_process
);
7277 defsubr (&Sdelete_process
);
7278 defsubr (&Sprocess_status
);
7279 defsubr (&Sprocess_exit_status
);
7280 defsubr (&Sprocess_id
);
7281 defsubr (&Sprocess_name
);
7282 defsubr (&Sprocess_tty_name
);
7283 defsubr (&Sprocess_command
);
7284 defsubr (&Sset_process_buffer
);
7285 defsubr (&Sprocess_buffer
);
7286 defsubr (&Sprocess_mark
);
7287 defsubr (&Sset_process_filter
);
7288 defsubr (&Sprocess_filter
);
7289 defsubr (&Sset_process_sentinel
);
7290 defsubr (&Sprocess_sentinel
);
7291 defsubr (&Sset_process_window_size
);
7292 defsubr (&Sset_process_inherit_coding_system_flag
);
7293 defsubr (&Sprocess_inherit_coding_system_flag
);
7294 defsubr (&Sset_process_query_on_exit_flag
);
7295 defsubr (&Sprocess_query_on_exit_flag
);
7296 defsubr (&Sprocess_contact
);
7297 defsubr (&Sprocess_plist
);
7298 defsubr (&Sset_process_plist
);
7299 defsubr (&Slist_processes
);
7300 defsubr (&Sprocess_list
);
7301 defsubr (&Sstart_process
);
7303 defsubr (&Sset_network_process_option
);
7304 defsubr (&Smake_network_process
);
7305 defsubr (&Sformat_network_address
);
7306 #endif /* HAVE_SOCKETS */
7307 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
7309 defsubr (&Snetwork_interface_list
);
7311 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7312 defsubr (&Snetwork_interface_info
);
7314 #endif /* HAVE_SOCKETS ... */
7315 #ifdef DATAGRAM_SOCKETS
7316 defsubr (&Sprocess_datagram_address
);
7317 defsubr (&Sset_process_datagram_address
);
7319 defsubr (&Saccept_process_output
);
7320 defsubr (&Sprocess_send_region
);
7321 defsubr (&Sprocess_send_string
);
7322 defsubr (&Sinterrupt_process
);
7323 defsubr (&Skill_process
);
7324 defsubr (&Squit_process
);
7325 defsubr (&Sstop_process
);
7326 defsubr (&Scontinue_process
);
7327 defsubr (&Sprocess_running_child_p
);
7328 defsubr (&Sprocess_send_eof
);
7329 defsubr (&Ssignal_process
);
7330 defsubr (&Swaiting_for_user_input_p
);
7331 /* defsubr (&Sprocess_connection); */
7332 defsubr (&Sset_process_coding_system
);
7333 defsubr (&Sprocess_coding_system
);
7334 defsubr (&Sset_process_filter_multibyte
);
7335 defsubr (&Sprocess_filter_multibyte_p
);
7339 #else /* not subprocesses */
7341 #include <sys/types.h>
7345 #include "systime.h"
7346 #include "charset.h"
7348 #include "termopts.h"
7349 #include "sysselect.h"
7351 extern int frame_garbaged
;
7353 extern EMACS_TIME
timer_check ();
7354 extern int timers_run
;
7358 /* As described above, except assuming that there are no subprocesses:
7360 Wait for timeout to elapse and/or keyboard input to be available.
7363 timeout in seconds, or
7364 zero for no limit, or
7365 -1 means gobble data immediately available but don't wait for any.
7367 read_kbd is a Lisp_Object:
7368 0 to ignore keyboard input, or
7369 1 to return when input is available, or
7370 -1 means caller will actually read the input, so don't throw to
7373 see full version for other parameters. We know that wait_proc will
7374 always be NULL, since `subprocesses' isn't defined.
7376 do_display != 0 means redisplay should be done to show subprocess
7377 output that arrives.
7379 Return true if we received input from any process. */
7382 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
7383 wait_for_cell
, wait_proc
, just_wait_proc
)
7384 int time_limit
, microsecs
, read_kbd
, do_display
;
7385 Lisp_Object wait_for_cell
;
7386 struct Lisp_Process
*wait_proc
;
7390 EMACS_TIME end_time
, timeout
;
7391 SELECT_TYPE waitchannels
;
7394 /* What does time_limit really mean? */
7395 if (time_limit
|| microsecs
)
7397 EMACS_GET_TIME (end_time
);
7398 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
7399 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
7402 /* Turn off periodic alarms (in case they are in use)
7403 and then turn off any other atimers,
7404 because the select emulator uses alarms. */
7406 turn_on_atimers (0);
7410 int timeout_reduced_for_timers
= 0;
7412 /* If calling from keyboard input, do not quit
7413 since we want to return C-g as an input character.
7414 Otherwise, do pending quit if requested. */
7418 /* Exit now if the cell we're waiting for became non-nil. */
7419 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7422 /* Compute time from now till when time limit is up */
7423 /* Exit if already run out */
7424 if (time_limit
== -1)
7426 /* -1 specified for timeout means
7427 gobble output available now
7428 but don't wait at all. */
7430 EMACS_SET_SECS_USECS (timeout
, 0, 0);
7432 else if (time_limit
|| microsecs
)
7434 EMACS_GET_TIME (timeout
);
7435 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
7436 if (EMACS_TIME_NEG_P (timeout
))
7441 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7444 /* If our caller will not immediately handle keyboard events,
7445 run timer events directly.
7446 (Callers that will immediately read keyboard events
7447 call timer_delay on their own.) */
7448 if (NILP (wait_for_cell
))
7450 EMACS_TIME timer_delay
;
7454 int old_timers_run
= timers_run
;
7455 timer_delay
= timer_check (1);
7456 if (timers_run
!= old_timers_run
&& do_display
)
7457 /* We must retry, since a timer may have requeued itself
7458 and that could alter the time delay. */
7459 redisplay_preserve_echo_area (14);
7463 while (!detect_input_pending ());
7465 /* If there is unread keyboard input, also return. */
7467 && requeued_events_pending_p ())
7470 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7472 EMACS_TIME difference
;
7473 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7474 if (EMACS_TIME_NEG_P (difference
))
7476 timeout
= timer_delay
;
7477 timeout_reduced_for_timers
= 1;
7482 /* Cause C-g and alarm signals to take immediate action,
7483 and cause input available signals to zero out timeout. */
7485 set_waiting_for_input (&timeout
);
7487 /* Wait till there is something to do. */
7489 if (! read_kbd
&& NILP (wait_for_cell
))
7490 FD_ZERO (&waitchannels
);
7492 FD_SET (0, &waitchannels
);
7494 /* If a frame has been newly mapped and needs updating,
7495 reprocess its display stuff. */
7496 if (frame_garbaged
&& do_display
)
7498 clear_waiting_for_input ();
7499 redisplay_preserve_echo_area (15);
7501 set_waiting_for_input (&timeout
);
7504 if (read_kbd
&& detect_input_pending ())
7507 FD_ZERO (&waitchannels
);
7510 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7515 /* Make C-g and alarm signals set flags again */
7516 clear_waiting_for_input ();
7518 /* If we woke up due to SIGWINCH, actually change size now. */
7519 do_pending_window_change (0);
7521 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7522 /* We waited the full specified time, so return now. */
7527 /* If the system call was interrupted, then go around the
7529 if (xerrno
== EINTR
)
7530 FD_ZERO (&waitchannels
);
7532 error ("select error: %s", emacs_strerror (xerrno
));
7535 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7536 /* System sometimes fails to deliver SIGIO. */
7537 kill (getpid (), SIGIO
);
7540 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7541 kill (getpid (), SIGIO
);
7544 /* Check for keyboard input */
7547 && detect_input_pending_run_timers (do_display
))
7549 swallow_events (do_display
);
7550 if (detect_input_pending_run_timers (do_display
))
7554 /* If there is unread keyboard input, also return. */
7556 && requeued_events_pending_p ())
7559 /* If wait_for_cell. check for keyboard input
7560 but don't run any timers.
7561 ??? (It seems wrong to me to check for keyboard
7562 input at all when wait_for_cell, but the code
7563 has been this way since July 1994.
7564 Try changing this after version 19.31.) */
7565 if (! NILP (wait_for_cell
)
7566 && detect_input_pending ())
7568 swallow_events (do_display
);
7569 if (detect_input_pending ())
7573 /* Exit now if the cell we're waiting for became non-nil. */
7574 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7584 /* Don't confuse make-docfile by having two doc strings for this function.
7585 make-docfile does not pay attention to #if, for good reason! */
7586 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7589 register Lisp_Object name
;
7594 /* Don't confuse make-docfile by having two doc strings for this function.
7595 make-docfile does not pay attention to #if, for good reason! */
7596 DEFUN ("process-inherit-coding-system-flag",
7597 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7601 register Lisp_Object process
;
7603 /* Ignore the argument and return the value of
7604 inherit-process-coding-system. */
7605 return inherit_process_coding_system
? Qt
: Qnil
;
7608 /* Kill all processes associated with `buffer'.
7609 If `buffer' is nil, kill all processes.
7610 Since we have no subprocesses, this does nothing. */
7613 kill_buffer_processes (buffer
)
7626 QCtype
= intern (":type");
7627 staticpro (&QCtype
);
7629 defsubr (&Sget_buffer_process
);
7630 defsubr (&Sprocess_inherit_coding_system_flag
);
7634 #endif /* not subprocesses */
7636 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7637 (do not change this comment) */