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. */
2688 unwind_request_sigio (dummy
)
2691 if (interrupt_input
)
2697 /* Create a network stream/datagram client/server process. Treated
2698 exactly like a normal process when reading and writing. Primary
2699 differences are in status display and process deletion. A network
2700 connection has no PID; you cannot signal it. All you can do is
2701 stop/continue it and deactivate/close it via delete-process */
2703 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2705 doc
: /* Create and return a network server or client process.
2707 In Emacs, network connections are represented by process objects, so
2708 input and output work as for subprocesses and `delete-process' closes
2709 a network connection. However, a network process has no process id,
2710 it cannot be signaled, and the status codes are different from normal
2713 Arguments are specified as keyword/argument pairs. The following
2714 arguments are defined:
2716 :name NAME -- NAME is name for process. It is modified if necessary
2719 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2720 with the process. Process output goes at end of that buffer, unless
2721 you specify an output stream or filter function to handle the output.
2722 BUFFER may be also nil, meaning that this process is not associated
2725 :host HOST -- HOST is name of the host to connect to, or its IP
2726 address. The symbol `local' specifies the local host. If specified
2727 for a server process, it must be a valid name or address for the local
2728 host, and only clients connecting to that address will be accepted.
2730 :service SERVICE -- SERVICE is name of the service desired, or an
2731 integer specifying a port number to connect to. If SERVICE is t,
2732 a random port number is selected for the server. (If Emacs was
2733 compiled with getaddrinfo, a port number can also be specified as a
2734 string, e.g. "80", as well as an integer. This is not portable.)
2736 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2737 stream type connection, `datagram' creates a datagram type connection.
2739 :family FAMILY -- FAMILY is the address (and protocol) family for the
2740 service specified by HOST and SERVICE. The default (nil) is to use
2741 whatever address family (IPv4 or IPv6) that is defined for the host
2742 and port number specified by HOST and SERVICE. Other address families
2744 local -- for a local (i.e. UNIX) address specified by SERVICE.
2745 ipv4 -- use IPv4 address family only.
2746 ipv6 -- use IPv6 address family only.
2748 :local ADDRESS -- ADDRESS is the local address used for the connection.
2749 This parameter is ignored when opening a client process. When specified
2750 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2752 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2753 connection. This parameter is ignored when opening a stream server
2754 process. For a datagram server process, it specifies the initial
2755 setting of the remote datagram address. When specified for a client
2756 process, the FAMILY, HOST, and SERVICE args are ignored.
2758 The format of ADDRESS depends on the address family:
2759 - An IPv4 address is represented as an vector of integers [A B C D P]
2760 corresponding to numeric IP address A.B.C.D and port number P.
2761 - A local address is represented as a string with the address in the
2762 local address space.
2763 - An "unsupported family" address is represented by a cons (F . AV)
2764 where F is the family number and AV is a vector containing the socket
2765 address data with one element per address data byte. Do not rely on
2766 this format in portable code, as it may depend on implementation
2767 defined constants, data sizes, and data structure alignment.
2769 :coding CODING -- If CODING is a symbol, it specifies the coding
2770 system used for both reading and writing for this process. If CODING
2771 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2772 ENCODING is used for writing.
2774 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2775 return without waiting for the connection to complete; instead, the
2776 sentinel function will be called with second arg matching "open" (if
2777 successful) or "failed" when the connect completes. Default is to use
2778 a blocking connect (i.e. wait) for stream type connections.
2780 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2781 running when Emacs is exited.
2783 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2784 In the stopped state, a server process does not accept new
2785 connections, and a client process does not handle incoming traffic.
2786 The stopped state is cleared by `continue-process' and set by
2789 :filter FILTER -- Install FILTER as the process filter.
2791 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2792 process filter are multibyte, otherwise they are unibyte.
2793 If this keyword is not specified, the strings are multibyte if
2794 `default-enable-multibyte-characters' is non-nil.
2796 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2798 :log LOG -- Install LOG as the server process log function. This
2799 function is called when the server accepts a network connection from a
2800 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2801 is the server process, CLIENT is the new process for the connection,
2802 and MESSAGE is a string.
2804 :plist PLIST -- Install PLIST as the new process' initial plist.
2806 :server QLEN -- if QLEN is non-nil, create a server process for the
2807 specified FAMILY, SERVICE, and connection type (stream or datagram).
2808 If QLEN is an integer, it is used as the max. length of the server's
2809 pending connection queue (also known as the backlog); the default
2810 queue length is 5. Default is to create a client process.
2812 The following network options can be specified for this connection:
2814 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2815 :dontroute BOOL -- Only send to directly connected hosts.
2816 :keepalive BOOL -- Send keep-alive messages on network stream.
2817 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2818 :oobinline BOOL -- Place out-of-band data in receive data stream.
2819 :priority INT -- Set protocol defined priority for sent packets.
2820 :reuseaddr BOOL -- Allow reusing a recently used local address
2821 (this is allowed by default for a server process).
2822 :bindtodevice NAME -- bind to interface NAME. Using this may require
2823 special privileges on some systems.
2825 Consult the relevant system programmer's manual pages for more
2826 information on using these options.
2829 A server process will listen for and accept connections from clients.
2830 When a client connection is accepted, a new network process is created
2831 for the connection with the following parameters:
2833 - The client's process name is constructed by concatenating the server
2834 process' NAME and a client identification string.
2835 - If the FILTER argument is non-nil, the client process will not get a
2836 separate process buffer; otherwise, the client's process buffer is a newly
2837 created buffer named after the server process' BUFFER name or process
2838 NAME concatenated with the client identification string.
2839 - The connection type and the process filter and sentinel parameters are
2840 inherited from the server process' TYPE, FILTER and SENTINEL.
2841 - The client process' contact info is set according to the client's
2842 addressing information (typically an IP address and a port number).
2843 - The client process' plist is initialized from the server's plist.
2845 Notice that the FILTER and SENTINEL args are never used directly by
2846 the server process. Also, the BUFFER argument is not used directly by
2847 the server process, but via the optional :log function, accepted (and
2848 failed) connections may be logged in the server process' buffer.
2850 The original argument list, modified with the actual connection
2851 information, is available via the `process-contact' function.
2853 usage: (make-network-process &rest ARGS) */)
2859 Lisp_Object contact
;
2860 struct Lisp_Process
*p
;
2861 #ifdef HAVE_GETADDRINFO
2862 struct addrinfo ai
, *res
, *lres
;
2863 struct addrinfo hints
;
2864 char *portstring
, portbuf
[128];
2865 #else /* HAVE_GETADDRINFO */
2866 struct _emacs_addrinfo
2872 struct sockaddr
*ai_addr
;
2873 struct _emacs_addrinfo
*ai_next
;
2875 #endif /* HAVE_GETADDRINFO */
2876 struct sockaddr_in address_in
;
2877 #ifdef HAVE_LOCAL_SOCKETS
2878 struct sockaddr_un address_un
;
2883 int s
= -1, outch
, inch
;
2884 struct gcpro gcpro1
;
2885 int count
= SPECPDL_INDEX ();
2887 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2889 Lisp_Object name
, buffer
, host
, service
, address
;
2890 Lisp_Object filter
, sentinel
;
2891 int is_non_blocking_client
= 0;
2892 int is_server
= 0, backlog
= 5;
2899 /* Save arguments for process-contact and clone-process. */
2900 contact
= Flist (nargs
, args
);
2904 /* Ensure socket support is loaded if available. */
2905 init_winsock (TRUE
);
2908 /* :type TYPE (nil: stream, datagram */
2909 tem
= Fplist_get (contact
, QCtype
);
2911 socktype
= SOCK_STREAM
;
2912 #ifdef DATAGRAM_SOCKETS
2913 else if (EQ (tem
, Qdatagram
))
2914 socktype
= SOCK_DGRAM
;
2917 error ("Unsupported connection type");
2920 tem
= Fplist_get (contact
, QCserver
);
2923 /* Don't support network sockets when non-blocking mode is
2924 not available, since a blocked Emacs is not useful. */
2925 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2926 error ("Network servers not supported");
2930 backlog
= XINT (tem
);
2934 /* Make QCaddress an alias for :local (server) or :remote (client). */
2935 QCaddress
= is_server
? QClocal
: QCremote
;
2938 if (!is_server
&& socktype
== SOCK_STREAM
2939 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2941 #ifndef NON_BLOCKING_CONNECT
2942 error ("Non-blocking connect not supported");
2944 is_non_blocking_client
= 1;
2948 name
= Fplist_get (contact
, QCname
);
2949 buffer
= Fplist_get (contact
, QCbuffer
);
2950 filter
= Fplist_get (contact
, QCfilter
);
2951 sentinel
= Fplist_get (contact
, QCsentinel
);
2953 CHECK_STRING (name
);
2956 /* Let's handle TERM before things get complicated ... */
2957 host
= Fplist_get (contact
, QChost
);
2958 CHECK_STRING (host
);
2960 service
= Fplist_get (contact
, QCservice
);
2961 if (INTEGERP (service
))
2962 port
= htons ((unsigned short) XINT (service
));
2965 struct servent
*svc_info
;
2966 CHECK_STRING (service
);
2967 svc_info
= getservbyname (SDATA (service
), "tcp");
2969 error ("Unknown service: %s", SDATA (service
));
2970 port
= svc_info
->s_port
;
2973 s
= connect_server (0);
2975 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2976 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2977 send_command (s
, C_DUMB
, 1, 0);
2979 #else /* not TERM */
2981 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2982 ai
.ai_socktype
= socktype
;
2987 /* :local ADDRESS or :remote ADDRESS */
2988 address
= Fplist_get (contact
, QCaddress
);
2989 if (!NILP (address
))
2991 host
= service
= Qnil
;
2993 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2994 error ("Malformed :address");
2995 ai
.ai_family
= family
;
2996 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2997 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3001 /* :family FAMILY -- nil (for Inet), local, or integer. */
3002 tem
= Fplist_get (contact
, QCfamily
);
3005 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3011 #ifdef HAVE_LOCAL_SOCKETS
3012 else if (EQ (tem
, Qlocal
))
3016 else if (EQ (tem
, Qipv6
))
3019 else if (EQ (tem
, Qipv4
))
3021 else if (INTEGERP (tem
))
3022 family
= XINT (tem
);
3024 error ("Unknown address family");
3026 ai
.ai_family
= family
;
3028 /* :service SERVICE -- string, integer (port number), or t (random port). */
3029 service
= Fplist_get (contact
, QCservice
);
3031 #ifdef HAVE_LOCAL_SOCKETS
3032 if (family
== AF_LOCAL
)
3034 /* Host is not used. */
3036 CHECK_STRING (service
);
3037 bzero (&address_un
, sizeof address_un
);
3038 address_un
.sun_family
= AF_LOCAL
;
3039 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
3040 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3041 ai
.ai_addrlen
= sizeof address_un
;
3046 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3047 host
= Fplist_get (contact
, QChost
);
3050 if (EQ (host
, Qlocal
))
3051 host
= build_string ("localhost");
3052 CHECK_STRING (host
);
3055 /* Slow down polling to every ten seconds.
3056 Some kernels have a bug which causes retrying connect to fail
3057 after a connect. Polling can interfere with gethostbyname too. */
3058 #ifdef POLL_FOR_INPUT
3059 if (socktype
== SOCK_STREAM
)
3061 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3062 bind_polling_period (10);
3066 #ifdef HAVE_GETADDRINFO
3067 /* If we have a host, use getaddrinfo to resolve both host and service.
3068 Otherwise, use getservbyname to lookup the service. */
3072 /* SERVICE can either be a string or int.
3073 Convert to a C string for later use by getaddrinfo. */
3074 if (EQ (service
, Qt
))
3076 else if (INTEGERP (service
))
3078 sprintf (portbuf
, "%ld", (long) XINT (service
));
3079 portstring
= portbuf
;
3083 CHECK_STRING (service
);
3084 portstring
= SDATA (service
);
3089 memset (&hints
, 0, sizeof (hints
));
3091 hints
.ai_family
= family
;
3092 hints
.ai_socktype
= socktype
;
3093 hints
.ai_protocol
= 0;
3095 #ifdef HAVE_RES_INIT
3099 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
3101 #ifdef HAVE_GAI_STRERROR
3102 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
3104 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
3110 #endif /* HAVE_GETADDRINFO */
3112 /* We end up here if getaddrinfo is not defined, or in case no hostname
3113 has been specified (e.g. for a local server process). */
3115 if (EQ (service
, Qt
))
3117 else if (INTEGERP (service
))
3118 port
= htons ((unsigned short) XINT (service
));
3121 struct servent
*svc_info
;
3122 CHECK_STRING (service
);
3123 svc_info
= getservbyname (SDATA (service
),
3124 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3126 error ("Unknown service: %s", SDATA (service
));
3127 port
= svc_info
->s_port
;
3130 bzero (&address_in
, sizeof address_in
);
3131 address_in
.sin_family
= family
;
3132 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3133 address_in
.sin_port
= port
;
3135 #ifndef HAVE_GETADDRINFO
3138 struct hostent
*host_info_ptr
;
3140 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3141 as it may `hang' Emacs for a very long time. */
3145 #ifdef HAVE_RES_INIT
3149 host_info_ptr
= gethostbyname (SDATA (host
));
3154 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
3155 host_info_ptr
->h_length
);
3156 family
= host_info_ptr
->h_addrtype
;
3157 address_in
.sin_family
= family
;
3160 /* Attempt to interpret host as numeric inet address */
3162 IN_ADDR numeric_addr
;
3163 numeric_addr
= inet_addr ((char *) SDATA (host
));
3164 if (NUMERIC_ADDR_ERROR
)
3165 error ("Unknown host \"%s\"", SDATA (host
));
3167 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
3168 sizeof (address_in
.sin_addr
));
3172 #endif /* not HAVE_GETADDRINFO */
3174 ai
.ai_family
= family
;
3175 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3176 ai
.ai_addrlen
= sizeof address_in
;
3181 /* Previously this was compiled unconditionally, but that seems
3182 unnecessary on modern systems, and `unrequest_sigio' was a noop
3183 under X anyway. --lorentey */
3184 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3185 when connect is interrupted. So let's not let it get interrupted.
3186 Note we do not turn off polling, because polling is only used
3187 when not interrupt_input, and thus not normally used on the systems
3188 which have this bug. On systems which use polling, there's no way
3189 to quit if polling is turned off. */
3191 && !is_server
&& socktype
== SOCK_STREAM
)
3193 /* Comment from KFS: The original open-network-stream code
3194 didn't unwind protect this, but it seems like the proper
3195 thing to do. In any case, I don't see how it could harm to
3196 do this -- and it makes cleanup (using unbind_to) easier. */
3197 record_unwind_protect (unwind_request_sigio
, Qnil
);
3202 /* Do this in case we never enter the for-loop below. */
3203 count1
= SPECPDL_INDEX ();
3206 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3212 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3219 #ifdef DATAGRAM_SOCKETS
3220 if (!is_server
&& socktype
== SOCK_DGRAM
)
3222 #endif /* DATAGRAM_SOCKETS */
3224 #ifdef NON_BLOCKING_CONNECT
3225 if (is_non_blocking_client
)
3228 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3230 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3242 /* Make us close S if quit. */
3243 record_unwind_protect (close_file_unwind
, make_number (s
));
3245 /* Parse network options in the arg list.
3246 We simply ignore anything which isn't a known option (including other keywords).
3247 An error is signalled if setting a known option fails. */
3248 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3249 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3253 /* Configure as a server socket. */
3255 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3256 explicit :reuseaddr key to override this. */
3257 #ifdef HAVE_LOCAL_SOCKETS
3258 if (family
!= AF_LOCAL
)
3260 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3263 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3264 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3267 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3268 report_file_error ("Cannot bind server socket", Qnil
);
3270 #ifdef HAVE_GETSOCKNAME
3271 if (EQ (service
, Qt
))
3273 struct sockaddr_in sa1
;
3274 int len1
= sizeof (sa1
);
3275 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3277 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3278 service
= make_number (ntohs (sa1
.sin_port
));
3279 contact
= Fplist_put (contact
, QCservice
, service
);
3284 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3285 report_file_error ("Cannot listen on server socket", Qnil
);
3293 /* This turns off all alarm-based interrupts; the
3294 bind_polling_period call above doesn't always turn all the
3295 short-interval ones off, especially if interrupt_input is
3298 It'd be nice to be able to control the connect timeout
3299 though. Would non-blocking connect calls be portable?
3301 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3303 turn_on_atimers (0);
3305 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3308 turn_on_atimers (1);
3310 if (ret
== 0 || xerrno
== EISCONN
)
3312 /* The unwind-protect will be discarded afterwards.
3313 Likewise for immediate_quit. */
3317 #ifdef NON_BLOCKING_CONNECT
3319 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3323 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3331 /* Discard the unwind protect closing S. */
3332 specpdl_ptr
= specpdl
+ count1
;
3336 if (xerrno
== EINTR
)
3342 #ifdef DATAGRAM_SOCKETS
3343 if (socktype
== SOCK_DGRAM
)
3345 if (datagram_address
[s
].sa
)
3347 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3348 datagram_address
[s
].len
= lres
->ai_addrlen
;
3352 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3353 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3356 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3357 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3358 conv_lisp_to_sockaddr (rfamily
, remote
,
3359 datagram_address
[s
].sa
, rlen
);
3363 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3366 contact
= Fplist_put (contact
, QCaddress
,
3367 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3368 #ifdef HAVE_GETSOCKNAME
3371 struct sockaddr_in sa1
;
3372 int len1
= sizeof (sa1
);
3373 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3374 contact
= Fplist_put (contact
, QClocal
,
3375 conv_sockaddr_to_lisp (&sa1
, len1
));
3382 #ifdef HAVE_GETADDRINFO
3391 /* Discard the unwind protect for closing S, if any. */
3392 specpdl_ptr
= specpdl
+ count1
;
3394 /* Unwind bind_polling_period and request_sigio. */
3395 unbind_to (count
, Qnil
);
3399 /* If non-blocking got this far - and failed - assume non-blocking is
3400 not supported after all. This is probably a wrong assumption, but
3401 the normal blocking calls to open-network-stream handles this error
3403 if (is_non_blocking_client
)
3408 report_file_error ("make server process failed", contact
);
3410 report_file_error ("make client process failed", contact
);
3413 #endif /* not TERM */
3419 buffer
= Fget_buffer_create (buffer
);
3420 proc
= make_process (name
);
3422 chan_process
[inch
] = proc
;
3425 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3428 fcntl (inch
, F_SETFL
, O_NDELAY
);
3432 p
= XPROCESS (proc
);
3434 p
->childp
= contact
;
3435 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3438 p
->sentinel
= sentinel
;
3440 p
->filter_multibyte
= !NILP (buffer_defaults
.enable_multibyte_characters
);
3441 /* Override the above only if :filter-multibyte is specified. */
3442 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3443 p
->filter_multibyte
= !NILP (Fplist_get (contact
, QCfilter_multibyte
));
3444 p
->log
= Fplist_get (contact
, QClog
);
3445 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3446 p
->kill_without_query
= 1;
3447 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3452 if (is_server
&& socktype
== SOCK_STREAM
)
3453 p
->status
= Qlisten
;
3455 /* Make the process marker point into the process buffer (if any). */
3456 if (BUFFERP (buffer
))
3457 set_marker_both (p
->mark
, buffer
,
3458 BUF_ZV (XBUFFER (buffer
)),
3459 BUF_ZV_BYTE (XBUFFER (buffer
)));
3461 #ifdef NON_BLOCKING_CONNECT
3462 if (is_non_blocking_client
)
3464 /* We may get here if connect did succeed immediately. However,
3465 in that case, we still need to signal this like a non-blocking
3467 p
->status
= Qconnect
;
3468 if (!FD_ISSET (inch
, &connect_wait_mask
))
3470 FD_SET (inch
, &connect_wait_mask
);
3471 num_pending_connects
++;
3476 /* A server may have a client filter setting of Qt, but it must
3477 still listen for incoming connects unless it is stopped. */
3478 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3479 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3481 FD_SET (inch
, &input_wait_mask
);
3482 FD_SET (inch
, &non_keyboard_wait_mask
);
3485 if (inch
> max_process_desc
)
3486 max_process_desc
= inch
;
3488 tem
= Fplist_member (contact
, QCcoding
);
3489 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3490 tem
= Qnil
; /* No error message (too late!). */
3493 /* Setup coding systems for communicating with the network stream. */
3494 struct gcpro gcpro1
;
3495 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3496 Lisp_Object coding_systems
= Qt
;
3497 Lisp_Object args
[5], val
;
3501 val
= XCAR (XCDR (tem
));
3505 else if (!NILP (Vcoding_system_for_read
))
3506 val
= Vcoding_system_for_read
;
3507 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3508 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3509 /* We dare not decode end-of-line format by setting VAL to
3510 Qraw_text, because the existing Emacs Lisp libraries
3511 assume that they receive bare code including a sequene of
3516 if (NILP (host
) || NILP (service
))
3517 coding_systems
= Qnil
;
3520 args
[0] = Qopen_network_stream
, args
[1] = name
,
3521 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3523 coding_systems
= Ffind_operation_coding_system (5, args
);
3526 if (CONSP (coding_systems
))
3527 val
= XCAR (coding_systems
);
3528 else if (CONSP (Vdefault_process_coding_system
))
3529 val
= XCAR (Vdefault_process_coding_system
);
3533 p
->decode_coding_system
= val
;
3537 val
= XCAR (XCDR (tem
));
3541 else if (!NILP (Vcoding_system_for_write
))
3542 val
= Vcoding_system_for_write
;
3543 else if (NILP (current_buffer
->enable_multibyte_characters
))
3547 if (EQ (coding_systems
, Qt
))
3549 if (NILP (host
) || NILP (service
))
3550 coding_systems
= Qnil
;
3553 args
[0] = Qopen_network_stream
, args
[1] = name
,
3554 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3556 coding_systems
= Ffind_operation_coding_system (5, args
);
3560 if (CONSP (coding_systems
))
3561 val
= XCDR (coding_systems
);
3562 else if (CONSP (Vdefault_process_coding_system
))
3563 val
= XCDR (Vdefault_process_coding_system
);
3567 p
->encode_coding_system
= val
;
3569 setup_process_coding_systems (proc
);
3571 p
->decoding_buf
= make_uninit_string (0);
3572 p
->decoding_carryover
= 0;
3573 p
->encoding_buf
= make_uninit_string (0);
3575 p
->inherit_coding_system_flag
3576 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3581 #endif /* HAVE_SOCKETS */
3584 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3587 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3588 doc
: /* Return an alist of all network interfaces and their network address.
3589 Each element is a cons, the car of which is a string containing the
3590 interface name, and the cdr is the network address in internal
3591 format; see the description of ADDRESS in `make-network-process'. */)
3594 struct ifconf ifconf
;
3595 struct ifreq
*ifreqs
= NULL
;
3600 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3606 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3607 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3614 ifconf
.ifc_len
= buf_size
;
3615 ifconf
.ifc_req
= ifreqs
;
3616 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3622 if (ifconf
.ifc_len
== buf_size
)
3626 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3629 while (--ifaces
>= 0)
3631 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3632 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3633 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3635 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3636 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3637 res
= Fcons (Fcons (build_string (namebuf
),
3638 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3639 sizeof (struct sockaddr
))),
3645 #endif /* SIOCGIFCONF */
3647 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3654 static struct ifflag_def ifflag_table
[] = {
3658 #ifdef IFF_BROADCAST
3659 { IFF_BROADCAST
, "broadcast" },
3662 { IFF_DEBUG
, "debug" },
3665 { IFF_LOOPBACK
, "loopback" },
3667 #ifdef IFF_POINTOPOINT
3668 { IFF_POINTOPOINT
, "pointopoint" },
3671 { IFF_RUNNING
, "running" },
3674 { IFF_NOARP
, "noarp" },
3677 { IFF_PROMISC
, "promisc" },
3679 #ifdef IFF_NOTRAILERS
3680 { IFF_NOTRAILERS
, "notrailers" },
3683 { IFF_ALLMULTI
, "allmulti" },
3686 { IFF_MASTER
, "master" },
3689 { IFF_SLAVE
, "slave" },
3691 #ifdef IFF_MULTICAST
3692 { IFF_MULTICAST
, "multicast" },
3695 { IFF_PORTSEL
, "portsel" },
3697 #ifdef IFF_AUTOMEDIA
3698 { IFF_AUTOMEDIA
, "automedia" },
3701 { IFF_DYNAMIC
, "dynamic" },
3704 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3707 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3710 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3713 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3716 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3721 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3722 doc
: /* Return information about network interface named IFNAME.
3723 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3724 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3725 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3726 FLAGS is the current flags of the interface. */)
3731 Lisp_Object res
= Qnil
;
3736 CHECK_STRING (ifname
);
3738 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3739 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3741 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3746 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3747 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3749 int flags
= rq
.ifr_flags
;
3750 struct ifflag_def
*fp
;
3754 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3756 if (flags
& fp
->flag_bit
)
3758 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3759 flags
-= fp
->flag_bit
;
3762 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3764 if (flags
& (1 << fnum
))
3766 elt
= Fcons (make_number (fnum
), elt
);
3771 res
= Fcons (elt
, res
);
3774 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3775 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3777 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3778 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3782 for (n
= 0; n
< 6; n
++)
3783 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3784 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3787 res
= Fcons (elt
, res
);
3790 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3791 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3794 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3795 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3797 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3801 res
= Fcons (elt
, res
);
3804 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3805 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3808 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3811 res
= Fcons (elt
, res
);
3814 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3815 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3818 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3821 res
= Fcons (elt
, res
);
3825 return any
? res
: Qnil
;
3828 #endif /* HAVE_SOCKETS */
3830 /* Turn off input and output for process PROC. */
3833 deactivate_process (proc
)
3836 register int inchannel
, outchannel
;
3837 register struct Lisp_Process
*p
= XPROCESS (proc
);
3839 inchannel
= p
->infd
;
3840 outchannel
= p
->outfd
;
3842 #ifdef ADAPTIVE_READ_BUFFERING
3843 if (p
->read_output_delay
> 0)
3845 if (--process_output_delay_count
< 0)
3846 process_output_delay_count
= 0;
3847 p
->read_output_delay
= 0;
3848 p
->read_output_skip
= 0;
3854 /* Beware SIGCHLD hereabouts. */
3855 flush_pending_output (inchannel
);
3858 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3859 sys$
dassgn (outchannel
);
3860 vs
= get_vms_process_pointer (p
->pid
);
3862 give_back_vms_process_stuff (vs
);
3865 emacs_close (inchannel
);
3866 if (outchannel
>= 0 && outchannel
!= inchannel
)
3867 emacs_close (outchannel
);
3872 #ifdef DATAGRAM_SOCKETS
3873 if (DATAGRAM_CHAN_P (inchannel
))
3875 xfree (datagram_address
[inchannel
].sa
);
3876 datagram_address
[inchannel
].sa
= 0;
3877 datagram_address
[inchannel
].len
= 0;
3880 chan_process
[inchannel
] = Qnil
;
3881 FD_CLR (inchannel
, &input_wait_mask
);
3882 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3883 #ifdef NON_BLOCKING_CONNECT
3884 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3886 FD_CLR (inchannel
, &connect_wait_mask
);
3887 if (--num_pending_connects
< 0)
3891 if (inchannel
== max_process_desc
)
3894 /* We just closed the highest-numbered process input descriptor,
3895 so recompute the highest-numbered one now. */
3896 max_process_desc
= 0;
3897 for (i
= 0; i
< MAXDESC
; i
++)
3898 if (!NILP (chan_process
[i
]))
3899 max_process_desc
= i
;
3904 /* Close all descriptors currently in use for communication
3905 with subprocess. This is used in a newly-forked subprocess
3906 to get rid of irrelevant descriptors. */
3909 close_process_descs ()
3913 for (i
= 0; i
< MAXDESC
; i
++)
3915 Lisp_Object process
;
3916 process
= chan_process
[i
];
3917 if (!NILP (process
))
3919 int in
= XPROCESS (process
)->infd
;
3920 int out
= XPROCESS (process
)->outfd
;
3923 if (out
>= 0 && in
!= out
)
3930 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3932 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3933 It is read into the process' buffers or given to their filter functions.
3934 Non-nil arg PROCESS means do not return until some output has been received
3937 Non-nil second arg SECONDS and third arg MILLISEC are number of
3938 seconds and milliseconds to wait; return after that much time whether
3939 or not there is input. If SECONDS is a floating point number,
3940 it specifies a fractional number of seconds to wait.
3942 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3943 from PROCESS, suspending reading output from other processes.
3944 If JUST-THIS-ONE is an integer, don't run any timers either.
3945 Return non-nil if we received any output before the timeout expired. */)
3946 (process
, seconds
, millisec
, just_this_one
)
3947 register Lisp_Object process
, seconds
, millisec
, just_this_one
;
3949 int secs
, usecs
= 0;
3951 if (! NILP (process
))
3952 CHECK_PROCESS (process
);
3954 just_this_one
= Qnil
;
3956 if (!NILP (seconds
))
3958 if (INTEGERP (seconds
))
3959 secs
= XINT (seconds
);
3960 else if (FLOATP (seconds
))
3962 double timeout
= XFLOAT_DATA (seconds
);
3963 secs
= (int) timeout
;
3964 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3967 wrong_type_argument (Qnumberp
, seconds
);
3969 if (INTEGERP (millisec
))
3972 usecs
+= XINT (millisec
) * 1000;
3973 carry
= usecs
/ 1000000;
3975 if ((usecs
-= carry
* 1000000) < 0)
3982 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3983 secs
= -1, usecs
= 0;
3986 secs
= NILP (process
) ? -1 : 0;
3989 (wait_reading_process_output (secs
, usecs
, 0, 0,
3991 !NILP (process
) ? XPROCESS (process
) : NULL
,
3992 NILP (just_this_one
) ? 0 :
3993 !INTEGERP (just_this_one
) ? 1 : -1)
3997 /* Accept a connection for server process SERVER on CHANNEL. */
3999 static int connect_counter
= 0;
4002 server_accept_connection (server
, channel
)
4006 Lisp_Object proc
, caller
, name
, buffer
;
4007 Lisp_Object contact
, host
, service
;
4008 struct Lisp_Process
*ps
= XPROCESS (server
);
4009 struct Lisp_Process
*p
;
4013 struct sockaddr_in in
;
4015 struct sockaddr_in6 in6
;
4017 #ifdef HAVE_LOCAL_SOCKETS
4018 struct sockaddr_un un
;
4021 int len
= sizeof saddr
;
4023 s
= accept (channel
, &saddr
.sa
, &len
);
4032 if (code
== EWOULDBLOCK
)
4036 if (!NILP (ps
->log
))
4037 call3 (ps
->log
, server
, Qnil
,
4038 concat3 (build_string ("accept failed with code"),
4039 Fnumber_to_string (make_number (code
)),
4040 build_string ("\n")));
4046 /* Setup a new process to handle the connection. */
4048 /* Generate a unique identification of the caller, and build contact
4049 information for this process. */
4052 switch (saddr
.sa
.sa_family
)
4056 Lisp_Object args
[5];
4057 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4058 args
[0] = build_string ("%d.%d.%d.%d");
4059 args
[1] = make_number (*ip
++);
4060 args
[2] = make_number (*ip
++);
4061 args
[3] = make_number (*ip
++);
4062 args
[4] = make_number (*ip
++);
4063 host
= Fformat (5, args
);
4064 service
= make_number (ntohs (saddr
.in
.sin_port
));
4066 args
[0] = build_string (" <%s:%d>");
4069 caller
= Fformat (3, args
);
4076 Lisp_Object args
[9];
4077 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4079 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4080 for (i
= 0; i
< 8; i
++)
4081 args
[i
+1] = make_number (ntohs(ip6
[i
]));
4082 host
= Fformat (9, args
);
4083 service
= make_number (ntohs (saddr
.in
.sin_port
));
4085 args
[0] = build_string (" <[%s]:%d>");
4088 caller
= Fformat (3, args
);
4093 #ifdef HAVE_LOCAL_SOCKETS
4097 caller
= Fnumber_to_string (make_number (connect_counter
));
4098 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
4102 /* Create a new buffer name for this process if it doesn't have a
4103 filter. The new buffer name is based on the buffer name or
4104 process name of the server process concatenated with the caller
4107 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4111 buffer
= ps
->buffer
;
4113 buffer
= Fbuffer_name (buffer
);
4118 buffer
= concat2 (buffer
, caller
);
4119 buffer
= Fget_buffer_create (buffer
);
4123 /* Generate a unique name for the new server process. Combine the
4124 server process name with the caller identification. */
4126 name
= concat2 (ps
->name
, caller
);
4127 proc
= make_process (name
);
4129 chan_process
[s
] = proc
;
4132 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4135 fcntl (s
, F_SETFL
, O_NDELAY
);
4139 p
= XPROCESS (proc
);
4141 /* Build new contact information for this setup. */
4142 contact
= Fcopy_sequence (ps
->childp
);
4143 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4144 contact
= Fplist_put (contact
, QChost
, host
);
4145 if (!NILP (service
))
4146 contact
= Fplist_put (contact
, QCservice
, service
);
4147 contact
= Fplist_put (contact
, QCremote
,
4148 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4149 #ifdef HAVE_GETSOCKNAME
4151 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4152 contact
= Fplist_put (contact
, QClocal
,
4153 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4156 p
->childp
= contact
;
4157 p
->plist
= Fcopy_sequence (ps
->plist
);
4160 p
->sentinel
= ps
->sentinel
;
4161 p
->filter
= ps
->filter
;
4168 /* Client processes for accepted connections are not stopped initially. */
4169 if (!EQ (p
->filter
, Qt
))
4171 FD_SET (s
, &input_wait_mask
);
4172 FD_SET (s
, &non_keyboard_wait_mask
);
4175 if (s
> max_process_desc
)
4176 max_process_desc
= s
;
4178 /* Setup coding system for new process based on server process.
4179 This seems to be the proper thing to do, as the coding system
4180 of the new process should reflect the settings at the time the
4181 server socket was opened; not the current settings. */
4183 p
->decode_coding_system
= ps
->decode_coding_system
;
4184 p
->encode_coding_system
= ps
->encode_coding_system
;
4185 setup_process_coding_systems (proc
);
4187 p
->decoding_buf
= make_uninit_string (0);
4188 p
->decoding_carryover
= 0;
4189 p
->encoding_buf
= make_uninit_string (0);
4191 p
->inherit_coding_system_flag
4192 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4194 if (!NILP (ps
->log
))
4195 call3 (ps
->log
, server
, proc
,
4196 concat3 (build_string ("accept from "),
4197 (STRINGP (host
) ? host
: build_string ("-")),
4198 build_string ("\n")));
4200 if (!NILP (p
->sentinel
))
4201 exec_sentinel (proc
,
4202 concat3 (build_string ("open from "),
4203 (STRINGP (host
) ? host
: build_string ("-")),
4204 build_string ("\n")));
4207 /* This variable is different from waiting_for_input in keyboard.c.
4208 It is used to communicate to a lisp process-filter/sentinel (via the
4209 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4210 for user-input when that process-filter was called.
4211 waiting_for_input cannot be used as that is by definition 0 when
4212 lisp code is being evalled.
4213 This is also used in record_asynch_buffer_change.
4214 For that purpose, this must be 0
4215 when not inside wait_reading_process_output. */
4216 static int waiting_for_user_input_p
;
4219 wait_reading_process_output_unwind (data
)
4222 waiting_for_user_input_p
= XINT (data
);
4226 /* This is here so breakpoints can be put on it. */
4228 wait_reading_process_output_1 ()
4232 /* Use a wrapper around select to work around a bug in gdb 5.3.
4233 Normally, the wrapper is optimzed away by inlining.
4235 If emacs is stopped inside select, the gdb backtrace doesn't
4236 show the function which called select, so it is practically
4237 impossible to step through wait_reading_process_output. */
4241 select_wrapper (n
, rfd
, wfd
, xfd
, tmo
)
4243 SELECT_TYPE
*rfd
, *wfd
, *xfd
;
4246 return select (n
, rfd
, wfd
, xfd
, tmo
);
4248 #define select select_wrapper
4251 /* Read and dispose of subprocess output while waiting for timeout to
4252 elapse and/or keyboard input to be available.
4255 timeout in seconds, or
4256 zero for no limit, or
4257 -1 means gobble data immediately available but don't wait for any.
4260 an additional duration to wait, measured in microseconds.
4261 If this is nonzero and time_limit is 0, then the timeout
4262 consists of MICROSECS only.
4264 READ_KBD is a lisp value:
4265 0 to ignore keyboard input, or
4266 1 to return when input is available, or
4267 -1 meaning caller will actually read the input, so don't throw to
4268 the quit handler, or
4270 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4271 output that arrives.
4273 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4274 (and gobble terminal input into the buffer if any arrives).
4276 If WAIT_PROC is specified, wait until something arrives from that
4277 process. The return value is true if we read some input from
4280 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4281 (suspending output from other processes). A negative value
4282 means don't run any timers either.
4284 If WAIT_PROC is specified, then the function returns true if we
4285 received input from that process before the timeout elapsed.
4286 Otherwise, return true if we received input from any process. */
4289 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4290 wait_for_cell
, wait_proc
, just_wait_proc
)
4291 int time_limit
, microsecs
, read_kbd
, do_display
;
4292 Lisp_Object wait_for_cell
;
4293 struct Lisp_Process
*wait_proc
;
4296 register int channel
, nfds
;
4297 SELECT_TYPE Available
;
4298 #ifdef NON_BLOCKING_CONNECT
4299 SELECT_TYPE Connecting
;
4302 int check_delay
, no_avail
;
4305 EMACS_TIME timeout
, end_time
;
4306 int wait_channel
= -1;
4307 int got_some_input
= 0;
4308 int count
= SPECPDL_INDEX ();
4310 FD_ZERO (&Available
);
4311 #ifdef NON_BLOCKING_CONNECT
4312 FD_ZERO (&Connecting
);
4315 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4316 if (wait_proc
!= NULL
)
4317 wait_channel
= wait_proc
->infd
;
4319 record_unwind_protect (wait_reading_process_output_unwind
,
4320 make_number (waiting_for_user_input_p
));
4321 waiting_for_user_input_p
= read_kbd
;
4323 /* Since we may need to wait several times,
4324 compute the absolute time to return at. */
4325 if (time_limit
|| microsecs
)
4327 EMACS_GET_TIME (end_time
);
4328 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4329 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4331 #ifdef POLL_INTERRUPTED_SYS_CALL
4332 /* AlainF 5-Jul-1996
4333 HP-UX 10.10 seem to have problems with signals coming in
4334 Causes "poll: interrupted system call" messages when Emacs is run
4336 Turn off periodic alarms (in case they are in use),
4337 and then turn off any other atimers. */
4339 turn_on_atimers (0);
4340 #endif /* POLL_INTERRUPTED_SYS_CALL */
4344 int timeout_reduced_for_timers
= 0;
4346 /* If calling from keyboard input, do not quit
4347 since we want to return C-g as an input character.
4348 Otherwise, do pending quit if requested. */
4352 else if (interrupt_input_pending
)
4353 handle_async_input ();
4356 /* Exit now if the cell we're waiting for became non-nil. */
4357 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4360 /* Compute time from now till when time limit is up */
4361 /* Exit if already run out */
4362 if (time_limit
== -1)
4364 /* -1 specified for timeout means
4365 gobble output available now
4366 but don't wait at all. */
4368 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4370 else if (time_limit
|| microsecs
)
4372 EMACS_GET_TIME (timeout
);
4373 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4374 if (EMACS_TIME_NEG_P (timeout
))
4379 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4382 /* Normally we run timers here.
4383 But not if wait_for_cell; in those cases,
4384 the wait is supposed to be short,
4385 and those callers cannot handle running arbitrary Lisp code here. */
4386 if (NILP (wait_for_cell
)
4387 && just_wait_proc
>= 0)
4389 EMACS_TIME timer_delay
;
4393 int old_timers_run
= timers_run
;
4394 struct buffer
*old_buffer
= current_buffer
;
4396 timer_delay
= timer_check (1);
4398 /* If a timer has run, this might have changed buffers
4399 an alike. Make read_key_sequence aware of that. */
4400 if (timers_run
!= old_timers_run
4401 && old_buffer
!= current_buffer
4402 && waiting_for_user_input_p
== -1)
4403 record_asynch_buffer_change ();
4405 if (timers_run
!= old_timers_run
&& do_display
)
4406 /* We must retry, since a timer may have requeued itself
4407 and that could alter the time_delay. */
4408 redisplay_preserve_echo_area (9);
4412 while (!detect_input_pending ());
4414 /* If there is unread keyboard input, also return. */
4416 && requeued_events_pending_p ())
4419 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4421 EMACS_TIME difference
;
4422 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4423 if (EMACS_TIME_NEG_P (difference
))
4425 timeout
= timer_delay
;
4426 timeout_reduced_for_timers
= 1;
4429 /* If time_limit is -1, we are not going to wait at all. */
4430 else if (time_limit
!= -1)
4432 /* This is so a breakpoint can be put here. */
4433 wait_reading_process_output_1 ();
4437 /* Cause C-g and alarm signals to take immediate action,
4438 and cause input available signals to zero out timeout.
4440 It is important that we do this before checking for process
4441 activity. If we get a SIGCHLD after the explicit checks for
4442 process activity, timeout is the only way we will know. */
4444 set_waiting_for_input (&timeout
);
4446 /* If status of something has changed, and no input is
4447 available, notify the user of the change right away. After
4448 this explicit check, we'll let the SIGCHLD handler zap
4449 timeout to get our attention. */
4450 if (update_tick
!= process_tick
&& do_display
)
4453 #ifdef NON_BLOCKING_CONNECT
4457 Atemp
= input_wait_mask
;
4459 /* On Mac OS X 10.0, the SELECT system call always says input is
4460 present (for reading) at stdin, even when none is. This
4461 causes the call to SELECT below to return 1 and
4462 status_notify not to be called. As a result output of
4463 subprocesses are incorrectly discarded.
4467 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4469 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4470 if ((select (max (max (max_process_desc
, max_keyboard_desc
),
4473 #ifdef NON_BLOCKING_CONNECT
4474 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4478 (SELECT_TYPE
*)0, &timeout
)
4481 /* It's okay for us to do this and then continue with
4482 the loop, since timeout has already been zeroed out. */
4483 clear_waiting_for_input ();
4484 status_notify (NULL
);
4488 /* Don't wait for output from a non-running process. Just
4489 read whatever data has already been received. */
4490 if (wait_proc
&& wait_proc
->raw_status_new
)
4491 update_status (wait_proc
);
4493 && ! EQ (wait_proc
->status
, Qrun
)
4494 && ! EQ (wait_proc
->status
, Qconnect
))
4496 int nread
, total_nread
= 0;
4498 clear_waiting_for_input ();
4499 XSETPROCESS (proc
, wait_proc
);
4501 /* Read data from the process, until we exhaust it. */
4502 while (wait_proc
->infd
>= 0)
4504 nread
= read_process_output (proc
, wait_proc
->infd
);
4510 total_nread
+= nread
;
4512 else if (nread
== -1 && EIO
== errno
)
4516 else if (nread
== -1 && EAGAIN
== errno
)
4520 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4524 if (total_nread
> 0 && do_display
)
4525 redisplay_preserve_echo_area (10);
4530 /* Wait till there is something to do */
4532 if (wait_proc
&& just_wait_proc
)
4534 if (wait_proc
->infd
< 0) /* Terminated */
4536 FD_SET (wait_proc
->infd
, &Available
);
4538 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4540 else if (!NILP (wait_for_cell
))
4542 Available
= non_process_wait_mask
;
4544 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4549 Available
= non_keyboard_wait_mask
;
4551 Available
= input_wait_mask
;
4552 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4553 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4556 /* If frame size has changed or the window is newly mapped,
4557 redisplay now, before we start to wait. There is a race
4558 condition here; if a SIGIO arrives between now and the select
4559 and indicates that a frame is trashed, the select may block
4560 displaying a trashed screen. */
4561 if (frame_garbaged
&& do_display
)
4563 clear_waiting_for_input ();
4564 redisplay_preserve_echo_area (11);
4566 set_waiting_for_input (&timeout
);
4570 if (read_kbd
&& detect_input_pending ())
4577 #ifdef NON_BLOCKING_CONNECT
4579 Connecting
= connect_wait_mask
;
4582 #ifdef ADAPTIVE_READ_BUFFERING
4583 /* Set the timeout for adaptive read buffering if any
4584 process has non-zero read_output_skip and non-zero
4585 read_output_delay, and we are not reading output for a
4586 specific wait_channel. It is not executed if
4587 Vprocess_adaptive_read_buffering is nil. */
4588 if (process_output_skip
&& check_delay
> 0)
4590 int usecs
= EMACS_USECS (timeout
);
4591 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4592 usecs
= READ_OUTPUT_DELAY_MAX
;
4593 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4595 proc
= chan_process
[channel
];
4598 /* Find minimum non-zero read_output_delay among the
4599 processes with non-zero read_output_skip. */
4600 if (XPROCESS (proc
)->read_output_delay
> 0)
4603 if (!XPROCESS (proc
)->read_output_skip
)
4605 FD_CLR (channel
, &Available
);
4606 XPROCESS (proc
)->read_output_skip
= 0;
4607 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4608 usecs
= XPROCESS (proc
)->read_output_delay
;
4611 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4612 process_output_skip
= 0;
4616 nfds
= select (max (max (max_process_desc
, max_keyboard_desc
),
4619 #ifdef NON_BLOCKING_CONNECT
4620 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4624 (SELECT_TYPE
*)0, &timeout
);
4629 /* Make C-g and alarm signals set flags again */
4630 clear_waiting_for_input ();
4632 /* If we woke up due to SIGWINCH, actually change size now. */
4633 do_pending_window_change (0);
4635 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4636 /* We wanted the full specified time, so return now. */
4640 if (xerrno
== EINTR
)
4643 /* Ultrix select seems to return ENOMEM when it is
4644 interrupted. Treat it just like EINTR. Bleah. Note
4645 that we want to test for the "ultrix" CPP symbol, not
4646 "__ultrix__"; the latter is only defined under GCC, but
4647 not by DEC's bundled CC. -JimB */
4648 else if (xerrno
== ENOMEM
)
4652 /* This happens for no known reason on ALLIANT.
4653 I am guessing that this is the right response. -- RMS. */
4654 else if (xerrno
== EFAULT
)
4657 else if (xerrno
== EBADF
)
4660 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4661 the child's closure of the pts gives the parent a SIGHUP, and
4662 the ptc file descriptor is automatically closed,
4663 yielding EBADF here or at select() call above.
4664 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4665 in m/ibmrt-aix.h), and here we just ignore the select error.
4666 Cleanup occurs c/o status_notify after SIGCLD. */
4667 no_avail
= 1; /* Cannot depend on values returned */
4673 error ("select error: %s", emacs_strerror (xerrno
));
4678 FD_ZERO (&Available
);
4679 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4682 #if defined(sun) && !defined(USG5_4)
4683 if (nfds
> 0 && keyboard_bit_set (&Available
)
4685 /* System sometimes fails to deliver SIGIO.
4687 David J. Mackenzie says that Emacs doesn't compile under
4688 Solaris if this code is enabled, thus the USG5_4 in the CPP
4689 conditional. "I haven't noticed any ill effects so far.
4690 If you find a Solaris expert somewhere, they might know
4692 kill (getpid (), SIGIO
);
4695 #if 0 /* When polling is used, interrupt_input is 0,
4696 so get_input_pending should read the input.
4697 So this should not be needed. */
4698 /* If we are using polling for input,
4699 and we see input available, make it get read now.
4700 Otherwise it might not actually get read for a second.
4701 And on hpux, since we turn off polling in wait_reading_process_output,
4702 it might never get read at all if we don't spend much time
4703 outside of wait_reading_process_output. */
4704 if (read_kbd
&& interrupt_input
4705 && keyboard_bit_set (&Available
)
4706 && input_polling_used ())
4707 kill (getpid (), SIGALRM
);
4710 /* Check for keyboard input */
4711 /* If there is any, return immediately
4712 to give it higher priority than subprocesses */
4716 int old_timers_run
= timers_run
;
4717 struct buffer
*old_buffer
= current_buffer
;
4720 if (detect_input_pending_run_timers (do_display
))
4722 swallow_events (do_display
);
4723 if (detect_input_pending_run_timers (do_display
))
4727 /* If a timer has run, this might have changed buffers
4728 an alike. Make read_key_sequence aware of that. */
4729 if (timers_run
!= old_timers_run
4730 && waiting_for_user_input_p
== -1
4731 && old_buffer
!= current_buffer
)
4732 record_asynch_buffer_change ();
4738 /* If there is unread keyboard input, also return. */
4740 && requeued_events_pending_p ())
4743 /* If we are not checking for keyboard input now,
4744 do process events (but don't run any timers).
4745 This is so that X events will be processed.
4746 Otherwise they may have to wait until polling takes place.
4747 That would causes delays in pasting selections, for example.
4749 (We used to do this only if wait_for_cell.) */
4750 if (read_kbd
== 0 && detect_input_pending ())
4752 swallow_events (do_display
);
4753 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4754 if (detect_input_pending ())
4759 /* Exit now if the cell we're waiting for became non-nil. */
4760 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4764 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4765 go read it. This can happen with X on BSD after logging out.
4766 In that case, there really is no input and no SIGIO,
4767 but select says there is input. */
4769 if (read_kbd
&& interrupt_input
4770 && keyboard_bit_set (&Available
) && ! noninteractive
)
4771 kill (getpid (), SIGIO
);
4775 got_some_input
|= nfds
> 0;
4777 /* If checking input just got us a size-change event from X,
4778 obey it now if we should. */
4779 if (read_kbd
|| ! NILP (wait_for_cell
))
4780 do_pending_window_change (0);
4782 /* Check for data from a process. */
4783 if (no_avail
|| nfds
== 0)
4786 /* Really FIRST_PROC_DESC should be 0 on Unix,
4787 but this is safer in the short run. */
4788 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4790 if (FD_ISSET (channel
, &Available
)
4791 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4795 /* If waiting for this channel, arrange to return as
4796 soon as no more input to be processed. No more
4798 if (wait_channel
== channel
)
4804 proc
= chan_process
[channel
];
4808 /* If this is a server stream socket, accept connection. */
4809 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4811 server_accept_connection (proc
, channel
);
4815 /* Read data from the process, starting with our
4816 buffered-ahead character if we have one. */
4818 nread
= read_process_output (proc
, channel
);
4821 /* Since read_process_output can run a filter,
4822 which can call accept-process-output,
4823 don't try to read from any other processes
4824 before doing the select again. */
4825 FD_ZERO (&Available
);
4828 redisplay_preserve_echo_area (12);
4831 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4834 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4835 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4837 else if (nread
== -1 && errno
== EAGAIN
)
4841 else if (nread
== -1 && errno
== EAGAIN
)
4843 /* Note that we cannot distinguish between no input
4844 available now and a closed pipe.
4845 With luck, a closed pipe will be accompanied by
4846 subprocess termination and SIGCHLD. */
4847 else if (nread
== 0 && !NETCONN_P (proc
))
4849 #endif /* O_NDELAY */
4850 #endif /* O_NONBLOCK */
4852 /* On some OSs with ptys, when the process on one end of
4853 a pty exits, the other end gets an error reading with
4854 errno = EIO instead of getting an EOF (0 bytes read).
4855 Therefore, if we get an error reading and errno =
4856 EIO, just continue, because the child process has
4857 exited and should clean itself up soon (e.g. when we
4860 However, it has been known to happen that the SIGCHLD
4861 got lost. So raise the signal again just in case.
4863 else if (nread
== -1 && errno
== EIO
)
4865 /* Clear the descriptor now, so we only raise the signal once. */
4866 FD_CLR (channel
, &input_wait_mask
);
4867 FD_CLR (channel
, &non_keyboard_wait_mask
);
4869 kill (getpid (), SIGCHLD
);
4871 #endif /* HAVE_PTYS */
4872 /* If we can detect process termination, don't consider the process
4873 gone just because its pipe is closed. */
4875 else if (nread
== 0 && !NETCONN_P (proc
))
4880 /* Preserve status of processes already terminated. */
4881 XPROCESS (proc
)->tick
= ++process_tick
;
4882 deactivate_process (proc
);
4883 if (XPROCESS (proc
)->raw_status_new
)
4884 update_status (XPROCESS (proc
));
4885 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4886 XPROCESS (proc
)->status
4887 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4890 #ifdef NON_BLOCKING_CONNECT
4891 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4892 && FD_ISSET (channel
, &connect_wait_mask
))
4894 struct Lisp_Process
*p
;
4896 FD_CLR (channel
, &connect_wait_mask
);
4897 if (--num_pending_connects
< 0)
4900 proc
= chan_process
[channel
];
4904 p
= XPROCESS (proc
);
4907 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4908 So only use it on systems where it is known to work. */
4910 int xlen
= sizeof(xerrno
);
4911 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4916 struct sockaddr pname
;
4917 int pnamelen
= sizeof(pname
);
4919 /* If connection failed, getpeername will fail. */
4921 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4923 /* Obtain connect failure code through error slippage. */
4926 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4933 p
->tick
= ++process_tick
;
4934 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4935 deactivate_process (proc
);
4940 /* Execute the sentinel here. If we had relied on
4941 status_notify to do it later, it will read input
4942 from the process before calling the sentinel. */
4943 exec_sentinel (proc
, build_string ("open\n"));
4944 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4946 FD_SET (p
->infd
, &input_wait_mask
);
4947 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4951 #endif /* NON_BLOCKING_CONNECT */
4952 } /* end for each file descriptor */
4953 } /* end while exit conditions not met */
4955 unbind_to (count
, Qnil
);
4957 /* If calling from keyboard input, do not quit
4958 since we want to return C-g as an input character.
4959 Otherwise, do pending quit if requested. */
4962 /* Prevent input_pending from remaining set if we quit. */
4963 clear_input_pending ();
4966 #ifdef POLL_INTERRUPTED_SYS_CALL
4967 /* AlainF 5-Jul-1996
4968 HP-UX 10.10 seems to have problems with signals coming in
4969 Causes "poll: interrupted system call" messages when Emacs is run
4971 Turn periodic alarms back on */
4973 #endif /* POLL_INTERRUPTED_SYS_CALL */
4975 return got_some_input
;
4978 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4981 read_process_output_call (fun_and_args
)
4982 Lisp_Object fun_and_args
;
4984 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4988 read_process_output_error_handler (error
)
4991 cmd_error_internal (error
, "error in process filter: ");
4993 update_echo_area ();
4994 Fsleep_for (make_number (2), Qnil
);
4998 /* Read pending output from the process channel,
4999 starting with our buffered-ahead character if we have one.
5000 Yield number of decoded characters read.
5002 This function reads at most 4096 characters.
5003 If you want to read all available subprocess output,
5004 you must call it repeatedly until it returns zero.
5006 The characters read are decoded according to PROC's coding-system
5010 read_process_output (proc
, channel
)
5012 register int channel
;
5014 register int nbytes
;
5016 register Lisp_Object outstream
;
5017 register struct buffer
*old
= current_buffer
;
5018 register struct Lisp_Process
*p
= XPROCESS (proc
);
5019 register int opoint
;
5020 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5021 int carryover
= p
->decoding_carryover
;
5025 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5027 vs
= get_vms_process_pointer (p
->pid
);
5031 return (0); /* Really weird if it does this */
5032 if (!(vs
->iosb
[0] & 1))
5033 return -1; /* I/O error */
5036 error ("Could not get VMS process pointer");
5037 chars
= vs
->inputBuffer
;
5038 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
5041 start_vms_process_read (vs
); /* Crank up the next read on the process */
5042 return 1; /* Nothing worth printing, say we got 1 */
5046 /* The data carried over in the previous decoding (which are at
5047 the tail of decoding buffer) should be prepended to the new
5048 data read to decode all together. */
5049 chars
= (char *) alloca (nbytes
+ carryover
);
5050 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
5051 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
5055 chars
= (char *) alloca (carryover
+ readmax
);
5057 /* See the comment above. */
5058 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
5060 #ifdef DATAGRAM_SOCKETS
5061 /* We have a working select, so proc_buffered_char is always -1. */
5062 if (DATAGRAM_CHAN_P (channel
))
5064 int len
= datagram_address
[channel
].len
;
5065 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5066 0, datagram_address
[channel
].sa
, &len
);
5070 if (proc_buffered_char
[channel
] < 0)
5072 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5073 #ifdef ADAPTIVE_READ_BUFFERING
5074 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5076 int delay
= p
->read_output_delay
;
5079 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5082 process_output_delay_count
++;
5083 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5086 else if (delay
> 0 && (nbytes
== readmax
))
5088 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5090 process_output_delay_count
--;
5092 p
->read_output_delay
= delay
;
5095 p
->read_output_skip
= 1;
5096 process_output_skip
= 1;
5103 chars
[carryover
] = proc_buffered_char
[channel
];
5104 proc_buffered_char
[channel
] = -1;
5105 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5109 nbytes
= nbytes
+ 1;
5111 #endif /* not VMS */
5113 p
->decoding_carryover
= 0;
5115 /* At this point, NBYTES holds number of bytes just received
5116 (including the one in proc_buffered_char[channel]). */
5119 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5121 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5124 /* Now set NBYTES how many bytes we must decode. */
5125 nbytes
+= carryover
;
5127 /* Read and dispose of the process output. */
5128 outstream
= p
->filter
;
5129 if (!NILP (outstream
))
5131 /* We inhibit quit here instead of just catching it so that
5132 hitting ^G when a filter happens to be running won't screw
5134 int count
= SPECPDL_INDEX ();
5135 Lisp_Object odeactivate
;
5136 Lisp_Object obuffer
, okeymap
;
5138 int outer_running_asynch_code
= running_asynch_code
;
5139 int waiting
= waiting_for_user_input_p
;
5141 /* No need to gcpro these, because all we do with them later
5142 is test them for EQness, and none of them should be a string. */
5143 odeactivate
= Vdeactivate_mark
;
5144 XSETBUFFER (obuffer
, current_buffer
);
5145 okeymap
= current_buffer
->keymap
;
5147 specbind (Qinhibit_quit
, Qt
);
5148 specbind (Qlast_nonmenu_event
, Qt
);
5150 /* In case we get recursively called,
5151 and we already saved the match data nonrecursively,
5152 save the same match data in safely recursive fashion. */
5153 if (outer_running_asynch_code
)
5156 /* Don't clobber the CURRENT match data, either! */
5157 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5158 restore_search_regs ();
5159 record_unwind_save_match_data ();
5160 Fset_match_data (tem
, Qt
);
5163 /* For speed, if a search happens within this code,
5164 save the match data in a special nonrecursive fashion. */
5165 running_asynch_code
= 1;
5167 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5169 Vlast_coding_system_used
= coding
->symbol
;
5170 /* A new coding system might be found. */
5171 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5173 p
->decode_coding_system
= coding
->symbol
;
5175 /* Don't call setup_coding_system for
5176 proc_decode_coding_system[channel] here. It is done in
5177 detect_coding called via decode_coding above. */
5179 /* If a coding system for encoding is not yet decided, we set
5180 it as the same as coding-system for decoding.
5182 But, before doing that we must check if
5183 proc_encode_coding_system[p->outfd] surely points to a
5184 valid memory because p->outfd will be changed once EOF is
5185 sent to the process. */
5186 if (NILP (p
->encode_coding_system
)
5187 && proc_encode_coding_system
[p
->outfd
])
5189 p
->encode_coding_system
= coding
->symbol
;
5190 setup_coding_system (coding
->symbol
,
5191 proc_encode_coding_system
[p
->outfd
]);
5192 if (proc_encode_coding_system
[p
->outfd
]->eol_type
5193 == CODING_EOL_UNDECIDED
)
5194 proc_encode_coding_system
[p
->outfd
]->eol_type
5199 carryover
= nbytes
- coding
->consumed
;
5203 if (SCHARS (p
->decoding_buf
) < carryover
)
5204 p
->decoding_buf
= make_uninit_string (carryover
);
5205 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5207 p
->decoding_carryover
= carryover
;
5208 /* Adjust the multibyteness of TEXT to that of the filter. */
5209 if (!p
->filter_multibyte
!= !STRING_MULTIBYTE (text
))
5210 text
= (STRING_MULTIBYTE (text
)
5211 ? Fstring_as_unibyte (text
)
5212 : Fstring_to_multibyte (text
));
5213 if (SBYTES (text
) > 0)
5214 internal_condition_case_1 (read_process_output_call
,
5216 Fcons (proc
, Fcons (text
, Qnil
))),
5217 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5218 read_process_output_error_handler
);
5220 /* If we saved the match data nonrecursively, restore it now. */
5221 restore_search_regs ();
5222 running_asynch_code
= outer_running_asynch_code
;
5224 /* Handling the process output should not deactivate the mark. */
5225 Vdeactivate_mark
= odeactivate
;
5227 /* Restore waiting_for_user_input_p as it was
5228 when we were called, in case the filter clobbered it. */
5229 waiting_for_user_input_p
= waiting
;
5231 #if 0 /* Call record_asynch_buffer_change unconditionally,
5232 because we might have changed minor modes or other things
5233 that affect key bindings. */
5234 if (! EQ (Fcurrent_buffer (), obuffer
)
5235 || ! EQ (current_buffer
->keymap
, okeymap
))
5237 /* But do it only if the caller is actually going to read events.
5238 Otherwise there's no need to make him wake up, and it could
5239 cause trouble (for example it would make sit_for return). */
5240 if (waiting_for_user_input_p
== -1)
5241 record_asynch_buffer_change ();
5244 start_vms_process_read (vs
);
5246 unbind_to (count
, Qnil
);
5250 /* If no filter, write into buffer if it isn't dead. */
5251 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
5253 Lisp_Object old_read_only
;
5254 int old_begv
, old_zv
;
5255 int old_begv_byte
, old_zv_byte
;
5256 Lisp_Object odeactivate
;
5257 int before
, before_byte
;
5262 odeactivate
= Vdeactivate_mark
;
5264 Fset_buffer (p
->buffer
);
5266 opoint_byte
= PT_BYTE
;
5267 old_read_only
= current_buffer
->read_only
;
5270 old_begv_byte
= BEGV_BYTE
;
5271 old_zv_byte
= ZV_BYTE
;
5273 current_buffer
->read_only
= Qnil
;
5275 /* Insert new output into buffer
5276 at the current end-of-output marker,
5277 thus preserving logical ordering of input and output. */
5278 if (XMARKER (p
->mark
)->buffer
)
5279 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5280 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5283 SET_PT_BOTH (ZV
, ZV_BYTE
);
5285 before_byte
= PT_BYTE
;
5287 /* If the output marker is outside of the visible region, save
5288 the restriction and widen. */
5289 if (! (BEGV
<= PT
&& PT
<= ZV
))
5292 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5294 Vlast_coding_system_used
= coding
->symbol
;
5295 /* A new coding system might be found. See the comment in the
5296 similar code in the previous `if' block. */
5297 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5299 p
->decode_coding_system
= coding
->symbol
;
5300 if (NILP (p
->encode_coding_system
)
5301 && proc_encode_coding_system
[p
->outfd
])
5303 p
->encode_coding_system
= coding
->symbol
;
5304 setup_coding_system (coding
->symbol
,
5305 proc_encode_coding_system
[p
->outfd
]);
5306 if (proc_encode_coding_system
[p
->outfd
]->eol_type
5307 == CODING_EOL_UNDECIDED
)
5308 proc_encode_coding_system
[p
->outfd
]->eol_type
5312 carryover
= nbytes
- coding
->consumed
;
5316 if (SCHARS (p
->decoding_buf
) < carryover
)
5317 p
->decoding_buf
= make_uninit_string (carryover
);
5318 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5320 p
->decoding_carryover
= carryover
;
5322 /* Adjust the multibyteness of TEXT to that of the buffer. */
5323 if (NILP (current_buffer
->enable_multibyte_characters
)
5324 != ! STRING_MULTIBYTE (text
))
5325 text
= (STRING_MULTIBYTE (text
)
5326 ? Fstring_as_unibyte (text
)
5327 : Fstring_to_multibyte (text
));
5328 /* Insert before markers in case we are inserting where
5329 the buffer's mark is, and the user's next command is Meta-y. */
5330 insert_from_string_before_markers (text
, 0, 0,
5331 SCHARS (text
), SBYTES (text
), 0);
5333 /* Make sure the process marker's position is valid when the
5334 process buffer is changed in the signal_after_change above.
5335 W3 is known to do that. */
5336 if (BUFFERP (p
->buffer
)
5337 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5338 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5340 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5342 update_mode_lines
++;
5344 /* Make sure opoint and the old restrictions
5345 float ahead of any new text just as point would. */
5346 if (opoint
>= before
)
5348 opoint
+= PT
- before
;
5349 opoint_byte
+= PT_BYTE
- before_byte
;
5351 if (old_begv
> before
)
5353 old_begv
+= PT
- before
;
5354 old_begv_byte
+= PT_BYTE
- before_byte
;
5356 if (old_zv
>= before
)
5358 old_zv
+= PT
- before
;
5359 old_zv_byte
+= PT_BYTE
- before_byte
;
5362 /* If the restriction isn't what it should be, set it. */
5363 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5364 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5366 /* Handling the process output should not deactivate the mark. */
5367 Vdeactivate_mark
= odeactivate
;
5369 current_buffer
->read_only
= old_read_only
;
5370 SET_PT_BOTH (opoint
, opoint_byte
);
5371 set_buffer_internal (old
);
5374 start_vms_process_read (vs
);
5379 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5381 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5382 This is intended for use by asynchronous process output filters and sentinels. */)
5385 return (waiting_for_user_input_p
? Qt
: Qnil
);
5388 /* Sending data to subprocess */
5390 jmp_buf send_process_frame
;
5391 Lisp_Object process_sent_to
;
5394 send_process_trap ()
5396 SIGNAL_THREAD_CHECK (SIGPIPE
);
5401 sigunblock (sigmask (SIGPIPE
));
5402 longjmp (send_process_frame
, 1);
5405 /* Send some data to process PROC.
5406 BUF is the beginning of the data; LEN is the number of characters.
5407 OBJECT is the Lisp object that the data comes from. If OBJECT is
5408 nil or t, it means that the data comes from C string.
5410 If OBJECT is not nil, the data is encoded by PROC's coding-system
5411 for encoding before it is sent.
5413 This function can evaluate Lisp code and can garbage collect. */
5416 send_process (proc
, buf
, len
, object
)
5417 volatile Lisp_Object proc
;
5418 unsigned char *volatile buf
;
5420 volatile Lisp_Object object
;
5422 /* Use volatile to protect variables from being clobbered by longjmp. */
5423 struct Lisp_Process
*p
= XPROCESS (proc
);
5425 struct coding_system
*coding
;
5426 struct gcpro gcpro1
;
5427 SIGTYPE (*volatile old_sigpipe
) ();
5432 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5435 if (p
->raw_status_new
)
5437 if (! EQ (p
->status
, Qrun
))
5438 error ("Process %s not running", SDATA (p
->name
));
5440 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5442 coding
= proc_encode_coding_system
[p
->outfd
];
5443 Vlast_coding_system_used
= coding
->symbol
;
5445 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5446 || (BUFFERP (object
)
5447 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5450 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5451 /* The coding system for encoding was changed to raw-text
5452 because we sent a unibyte text previously. Now we are
5453 sending a multibyte text, thus we must encode it by the
5454 original coding system specified for the current process. */
5455 setup_coding_system (p
->encode_coding_system
, coding
);
5456 if (coding
->eol_type
== CODING_EOL_UNDECIDED
)
5457 coding
->eol_type
= system_eol_type
;
5458 /* src_multibyte should be set to 1 _after_ a call to
5459 setup_coding_system, since it resets src_multibyte to
5461 coding
->src_multibyte
= 1;
5465 /* For sending a unibyte text, character code conversion should
5466 not take place but EOL conversion should. So, setup raw-text
5467 or one of the subsidiary if we have not yet done it. */
5468 if (coding
->type
!= coding_type_raw_text
)
5470 if (CODING_REQUIRE_FLUSHING (coding
))
5472 /* But, before changing the coding, we must flush out data. */
5473 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5474 send_process (proc
, "", 0, Qt
);
5476 coding
->src_multibyte
= 0;
5477 setup_raw_text_coding_system (coding
);
5480 coding
->dst_multibyte
= 0;
5482 if (CODING_REQUIRE_ENCODING (coding
))
5484 int require
= encoding_buffer_size (coding
, len
);
5485 int from_byte
= -1, from
= -1, to
= -1;
5487 if (BUFFERP (object
))
5489 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5490 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5491 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5493 else if (STRINGP (object
))
5495 from_byte
= buf
- SDATA (object
);
5496 from
= string_byte_to_char (object
, from_byte
);
5497 to
= string_byte_to_char (object
, from_byte
+ len
);
5500 if (coding
->composing
!= COMPOSITION_DISABLED
)
5503 coding_save_composition (coding
, from
, to
, object
);
5505 coding
->composing
= COMPOSITION_DISABLED
;
5508 if (SBYTES (p
->encoding_buf
) < require
)
5509 p
->encoding_buf
= make_uninit_string (require
);
5512 buf
= (BUFFERP (object
)
5513 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5514 : SDATA (object
) + from_byte
);
5516 object
= p
->encoding_buf
;
5517 encode_coding (coding
, (char *) buf
, SDATA (object
),
5518 len
, SBYTES (object
));
5519 coding_free_composition_data (coding
);
5520 len
= coding
->produced
;
5521 buf
= SDATA (object
);
5525 vs
= get_vms_process_pointer (p
->pid
);
5527 error ("Could not find this process: %x", p
->pid
);
5528 else if (write_to_vms_process (vs
, buf
, len
))
5532 if (pty_max_bytes
== 0)
5534 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5535 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5536 if (pty_max_bytes
< 0)
5537 pty_max_bytes
= 250;
5539 pty_max_bytes
= 250;
5541 /* Deduct one, to leave space for the eof. */
5545 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5546 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5547 when returning with longjmp despite being declared volatile. */
5548 if (!setjmp (send_process_frame
))
5550 process_sent_to
= proc
;
5555 /* Decide how much data we can send in one batch.
5556 Long lines need to be split into multiple batches. */
5559 /* Starting this at zero is always correct when not the first
5560 iteration because the previous iteration ended by sending C-d.
5561 It may not be correct for the first iteration
5562 if a partial line was sent in a separate send_process call.
5563 If that proves worth handling, we need to save linepos
5564 in the process object. */
5566 unsigned char *ptr
= (unsigned char *) buf
;
5567 unsigned char *end
= (unsigned char *) buf
+ len
;
5569 /* Scan through this text for a line that is too long. */
5570 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5578 /* If we found one, break the line there
5579 and put in a C-d to force the buffer through. */
5583 /* Send this batch, using one or more write calls. */
5586 int outfd
= p
->outfd
;
5587 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5588 #ifdef DATAGRAM_SOCKETS
5589 if (DATAGRAM_CHAN_P (outfd
))
5591 rv
= sendto (outfd
, (char *) buf
, this,
5592 0, datagram_address
[outfd
].sa
,
5593 datagram_address
[outfd
].len
);
5594 if (rv
< 0 && errno
== EMSGSIZE
)
5596 signal (SIGPIPE
, old_sigpipe
);
5597 report_file_error ("sending datagram",
5598 Fcons (proc
, Qnil
));
5604 rv
= emacs_write (outfd
, (char *) buf
, this);
5605 #ifdef ADAPTIVE_READ_BUFFERING
5606 if (p
->read_output_delay
> 0
5607 && p
->adaptive_read_buffering
== 1)
5609 p
->read_output_delay
= 0;
5610 process_output_delay_count
--;
5611 p
->read_output_skip
= 0;
5615 signal (SIGPIPE
, old_sigpipe
);
5621 || errno
== EWOULDBLOCK
5627 /* Buffer is full. Wait, accepting input;
5628 that may allow the program
5629 to finish doing output and read more. */
5633 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5634 /* A gross hack to work around a bug in FreeBSD.
5635 In the following sequence, read(2) returns
5639 write(2) 954 bytes, get EAGAIN
5640 read(2) 1024 bytes in process_read_output
5641 read(2) 11 bytes in process_read_output
5643 That is, read(2) returns more bytes than have
5644 ever been written successfully. The 1033 bytes
5645 read are the 1022 bytes written successfully
5646 after processing (for example with CRs added if
5647 the terminal is set up that way which it is
5648 here). The same bytes will be seen again in a
5649 later read(2), without the CRs. */
5651 if (errno
== EAGAIN
)
5654 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5656 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5658 /* Running filters might relocate buffers or strings.
5659 Arrange to relocate BUF. */
5660 if (BUFFERP (object
))
5661 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5662 else if (STRINGP (object
))
5663 offset
= buf
- SDATA (object
);
5665 #ifdef EMACS_HAS_USECS
5666 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5668 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5671 if (BUFFERP (object
))
5672 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5673 else if (STRINGP (object
))
5674 buf
= offset
+ SDATA (object
);
5679 /* This is a real error. */
5680 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5687 /* If we sent just part of the string, put in an EOF
5688 to force it through, before we send the rest. */
5690 Fprocess_send_eof (proc
);
5693 #endif /* not VMS */
5696 signal (SIGPIPE
, old_sigpipe
);
5698 proc
= process_sent_to
;
5699 p
= XPROCESS (proc
);
5701 p
->raw_status_new
= 0;
5702 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5703 p
->tick
= ++process_tick
;
5704 deactivate_process (proc
);
5706 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5708 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5716 send_process_object_unwind (buf
)
5721 if (XBUFFER (buf
) == current_buffer
)
5723 tembuf
= Fcurrent_buffer ();
5725 Fkill_buffer (tembuf
);
5729 /* Send current contents of region between START and END to PROC.
5730 If START is a string, send it instead.
5731 This function can evaluate Lisp code and can garbage collect. */
5734 send_process_object (proc
, start
, end
)
5735 Lisp_Object proc
, start
, end
;
5737 int count
= SPECPDL_INDEX ();
5738 Lisp_Object object
= STRINGP (start
) ? start
: Fcurrent_buffer ();
5739 struct buffer
*given_buffer
= current_buffer
;
5743 record_unwind_protect (send_process_object_unwind
, Fcurrent_buffer ());
5745 if (STRINGP (object
) ? STRING_MULTIBYTE (object
)
5746 : ! NILP (XBUFFER (object
)->enable_multibyte_characters
))
5748 struct Lisp_Process
*p
= XPROCESS (proc
);
5749 struct coding_system
*coding
;
5751 if (p
->raw_status_new
)
5753 if (! EQ (p
->status
, Qrun
))
5754 error ("Process %s not running", SDATA (p
->name
));
5756 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5758 coding
= proc_encode_coding_system
[p
->outfd
];
5759 if (! EQ (coding
->symbol
, p
->encode_coding_system
))
5760 /* The coding system for encoding was changed to raw-text
5761 because we sent a unibyte text previously. Now we are
5762 sending a multibyte text, thus we must encode it by the
5763 original coding system specified for the current process. */
5764 setup_coding_system (p
->encode_coding_system
, coding
);
5765 if (! NILP (coding
->pre_write_conversion
))
5767 struct gcpro gcpro1
, gcpro2
;
5769 GCPRO2 (proc
, object
);
5770 call2 (coding
->pre_write_conversion
, start
, end
);
5772 if (given_buffer
!= current_buffer
)
5774 start
= make_number (BEGV
), end
= make_number (ZV
);
5775 object
= Fcurrent_buffer ();
5780 if (BUFFERP (object
))
5782 EMACS_INT start_byte
;
5784 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5785 move_gap (XINT (end
));
5786 start_byte
= CHAR_TO_BYTE (XINT (start
));
5787 buf
= BYTE_POS_ADDR (start_byte
);
5788 len
= CHAR_TO_BYTE (XINT (end
)) - start_byte
;
5792 buf
= SDATA (object
);
5793 len
= SBYTES (object
);
5795 send_process (proc
, buf
, len
, object
);
5797 unbind_to (count
, Qnil
);
5800 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5802 doc
: /* Send current contents of region as input to PROCESS.
5803 PROCESS may be a process, a buffer, the name of a process or buffer, or
5804 nil, indicating the current buffer's process.
5805 Called from program, takes three arguments, PROCESS, START and END.
5806 If the region is more than 500 characters long,
5807 it is sent in several bunches. This may happen even for shorter regions.
5808 Output from processes can arrive in between bunches. */)
5809 (process
, start
, end
)
5810 Lisp_Object process
, start
, end
;
5814 proc
= get_process (process
);
5815 validate_region (&start
, &end
);
5816 send_process_object (proc
, start
, end
);
5820 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5822 doc
: /* Send PROCESS the contents of STRING as input.
5823 PROCESS may be a process, a buffer, the name of a process or buffer, or
5824 nil, indicating the current buffer's process.
5825 If STRING is more than 500 characters long,
5826 it is sent in several bunches. This may happen even for shorter strings.
5827 Output from processes can arrive in between bunches. */)
5829 Lisp_Object process
, string
;
5832 CHECK_STRING (string
);
5833 proc
= get_process (process
);
5834 send_process_object (proc
, string
, Qnil
);
5838 /* Return the foreground process group for the tty/pty that
5839 the process P uses. */
5841 emacs_get_tty_pgrp (p
)
5842 struct Lisp_Process
*p
;
5847 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5850 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5851 master side. Try the slave side. */
5852 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5856 ioctl (fd
, TIOCGPGRP
, &gid
);
5860 #endif /* defined (TIOCGPGRP ) */
5865 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5866 Sprocess_running_child_p
, 0, 1, 0,
5867 doc
: /* Return t if PROCESS has given the terminal to a child.
5868 If the operating system does not make it possible to find out,
5869 return t unconditionally. */)
5871 Lisp_Object process
;
5873 /* Initialize in case ioctl doesn't exist or gives an error,
5874 in a way that will cause returning t. */
5877 struct Lisp_Process
*p
;
5879 proc
= get_process (process
);
5880 p
= XPROCESS (proc
);
5882 if (!EQ (p
->childp
, Qt
))
5883 error ("Process %s is not a subprocess",
5886 error ("Process %s is not active",
5889 gid
= emacs_get_tty_pgrp (p
);
5896 /* send a signal number SIGNO to PROCESS.
5897 If CURRENT_GROUP is t, that means send to the process group
5898 that currently owns the terminal being used to communicate with PROCESS.
5899 This is used for various commands in shell mode.
5900 If CURRENT_GROUP is lambda, that means send to the process group
5901 that currently owns the terminal, but only if it is NOT the shell itself.
5903 If NOMSG is zero, insert signal-announcements into process's buffers
5906 If we can, we try to signal PROCESS by sending control characters
5907 down the pty. This allows us to signal inferiors who have changed
5908 their uid, for which killpg would return an EPERM error. */
5911 process_send_signal (process
, signo
, current_group
, nomsg
)
5912 Lisp_Object process
;
5914 Lisp_Object current_group
;
5918 register struct Lisp_Process
*p
;
5922 proc
= get_process (process
);
5923 p
= XPROCESS (proc
);
5925 if (!EQ (p
->childp
, Qt
))
5926 error ("Process %s is not a subprocess",
5929 error ("Process %s is not active",
5933 current_group
= Qnil
;
5935 /* If we are using pgrps, get a pgrp number and make it negative. */
5936 if (NILP (current_group
))
5937 /* Send the signal to the shell's process group. */
5941 #ifdef SIGNALS_VIA_CHARACTERS
5942 /* If possible, send signals to the entire pgrp
5943 by sending an input character to it. */
5945 /* TERMIOS is the latest and bestest, and seems most likely to
5946 work. If the system has it, use it. */
5949 cc_t
*sig_char
= NULL
;
5951 tcgetattr (p
->infd
, &t
);
5956 sig_char
= &t
.c_cc
[VINTR
];
5960 sig_char
= &t
.c_cc
[VQUIT
];
5964 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5965 sig_char
= &t
.c_cc
[VSWTCH
];
5967 sig_char
= &t
.c_cc
[VSUSP
];
5972 if (sig_char
&& *sig_char
!= CDISABLE
)
5974 send_process (proc
, sig_char
, 1, Qnil
);
5977 /* If we can't send the signal with a character,
5978 fall through and send it another way. */
5979 #else /* ! HAVE_TERMIOS */
5981 /* On Berkeley descendants, the following IOCTL's retrieve the
5982 current control characters. */
5983 #if defined (TIOCGLTC) && defined (TIOCGETC)
5991 ioctl (p
->infd
, TIOCGETC
, &c
);
5992 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5995 ioctl (p
->infd
, TIOCGETC
, &c
);
5996 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
6000 ioctl (p
->infd
, TIOCGLTC
, &lc
);
6001 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
6003 #endif /* ! defined (SIGTSTP) */
6006 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6008 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
6015 ioctl (p
->infd
, TCGETA
, &t
);
6016 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
6019 ioctl (p
->infd
, TCGETA
, &t
);
6020 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
6024 ioctl (p
->infd
, TCGETA
, &t
);
6025 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
6027 #endif /* ! defined (SIGTSTP) */
6029 #else /* ! defined (TCGETA) */
6030 Your configuration files are messed up
.
6031 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
6032 you'd better be using one of the alternatives above! */
6033 #endif /* ! defined (TCGETA) */
6034 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6035 /* In this case, the code above should alway returns. */
6037 #endif /* ! defined HAVE_TERMIOS */
6039 /* The code above may fall through if it can't
6040 handle the signal. */
6041 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6044 /* Get the current pgrp using the tty itself, if we have that.
6045 Otherwise, use the pty to get the pgrp.
6046 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6047 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6048 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6049 His patch indicates that if TIOCGPGRP returns an error, then
6050 we should just assume that p->pid is also the process group id. */
6052 gid
= emacs_get_tty_pgrp (p
);
6055 /* If we can't get the information, assume
6056 the shell owns the tty. */
6059 /* It is not clear whether anything really can set GID to -1.
6060 Perhaps on some system one of those ioctls can or could do so.
6061 Or perhaps this is vestigial. */
6064 #else /* ! defined (TIOCGPGRP ) */
6065 /* Can't select pgrps on this system, so we know that
6066 the child itself heads the pgrp. */
6068 #endif /* ! defined (TIOCGPGRP ) */
6070 /* If current_group is lambda, and the shell owns the terminal,
6071 don't send any signal. */
6072 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6080 p
->raw_status_new
= 0;
6082 p
->tick
= ++process_tick
;
6084 status_notify (NULL
);
6086 #endif /* ! defined (SIGCONT) */
6089 send_process (proc
, "\003", 1, Qnil
); /* ^C */
6094 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
6099 sys$
forcex (&(p
->pid
), 0, 1);
6102 flush_pending_output (p
->infd
);
6106 /* If we don't have process groups, send the signal to the immediate
6107 subprocess. That isn't really right, but it's better than any
6108 obvious alternative. */
6111 kill (p
->pid
, signo
);
6115 /* gid may be a pid, or minus a pgrp's number */
6117 if (!NILP (current_group
))
6119 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6120 EMACS_KILLPG (gid
, signo
);
6127 #else /* ! defined (TIOCSIGSEND) */
6128 EMACS_KILLPG (gid
, signo
);
6129 #endif /* ! defined (TIOCSIGSEND) */
6132 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6133 doc
: /* Interrupt process PROCESS.
6134 PROCESS may be a process, a buffer, or the name of a process or buffer.
6135 No arg or nil means current buffer's process.
6136 Second arg CURRENT-GROUP non-nil means send signal to
6137 the current process-group of the process's controlling terminal
6138 rather than to the process's own process group.
6139 If the process is a shell, this means interrupt current subjob
6140 rather than the shell.
6142 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6143 don't send the signal. */)
6144 (process
, current_group
)
6145 Lisp_Object process
, current_group
;
6147 process_send_signal (process
, SIGINT
, current_group
, 0);
6151 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6152 doc
: /* Kill process PROCESS. May be process or name of one.
6153 See function `interrupt-process' for more details on usage. */)
6154 (process
, current_group
)
6155 Lisp_Object process
, current_group
;
6157 process_send_signal (process
, SIGKILL
, current_group
, 0);
6161 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6162 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6163 See function `interrupt-process' for more details on usage. */)
6164 (process
, current_group
)
6165 Lisp_Object process
, current_group
;
6167 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6171 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6172 doc
: /* Stop process PROCESS. May be process or name of one.
6173 See function `interrupt-process' for more details on usage.
6174 If PROCESS is a network process, inhibit handling of incoming traffic. */)
6175 (process
, current_group
)
6176 Lisp_Object process
, current_group
;
6179 if (PROCESSP (process
) && NETCONN_P (process
))
6181 struct Lisp_Process
*p
;
6183 p
= XPROCESS (process
);
6184 if (NILP (p
->command
)
6187 FD_CLR (p
->infd
, &input_wait_mask
);
6188 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6195 error ("No SIGTSTP support");
6197 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6202 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6203 doc
: /* Continue process PROCESS. May be process or name of one.
6204 See function `interrupt-process' for more details on usage.
6205 If PROCESS is a network process, resume handling of incoming traffic. */)
6206 (process
, current_group
)
6207 Lisp_Object process
, current_group
;
6210 if (PROCESSP (process
) && NETCONN_P (process
))
6212 struct Lisp_Process
*p
;
6214 p
= XPROCESS (process
);
6215 if (EQ (p
->command
, Qt
)
6217 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6219 FD_SET (p
->infd
, &input_wait_mask
);
6220 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6227 process_send_signal (process
, SIGCONT
, current_group
, 0);
6229 error ("No SIGCONT support");
6234 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6235 2, 2, "sProcess (name or number): \nnSignal code: ",
6236 doc
: /* Send PROCESS the signal with code SIGCODE.
6237 PROCESS may also be a number specifying the process id of the
6238 process to signal; in this case, the process need not be a child of
6240 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6242 Lisp_Object process
, sigcode
;
6246 if (INTEGERP (process
))
6248 pid
= XINT (process
);
6252 if (FLOATP (process
))
6254 pid
= (pid_t
) XFLOAT_DATA (process
);
6258 if (STRINGP (process
))
6261 if (tem
= Fget_process (process
), NILP (tem
))
6263 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6270 process
= get_process (process
);
6275 CHECK_PROCESS (process
);
6276 pid
= XPROCESS (process
)->pid
;
6278 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6282 #define parse_signal(NAME, VALUE) \
6283 else if (!xstricmp (name, NAME)) \
6284 XSETINT (sigcode, VALUE)
6286 if (INTEGERP (sigcode
))
6290 unsigned char *name
;
6292 CHECK_SYMBOL (sigcode
);
6293 name
= SDATA (SYMBOL_NAME (sigcode
));
6295 if (!strncmp(name
, "SIG", 3) || !strncmp(name
, "sig", 3))
6301 parse_signal ("usr1", SIGUSR1
);
6304 parse_signal ("usr2", SIGUSR2
);
6307 parse_signal ("term", SIGTERM
);
6310 parse_signal ("hup", SIGHUP
);
6313 parse_signal ("int", SIGINT
);
6316 parse_signal ("quit", SIGQUIT
);
6319 parse_signal ("ill", SIGILL
);
6322 parse_signal ("abrt", SIGABRT
);
6325 parse_signal ("emt", SIGEMT
);
6328 parse_signal ("kill", SIGKILL
);
6331 parse_signal ("fpe", SIGFPE
);
6334 parse_signal ("bus", SIGBUS
);
6337 parse_signal ("segv", SIGSEGV
);
6340 parse_signal ("sys", SIGSYS
);
6343 parse_signal ("pipe", SIGPIPE
);
6346 parse_signal ("alrm", SIGALRM
);
6349 parse_signal ("urg", SIGURG
);
6352 parse_signal ("stop", SIGSTOP
);
6355 parse_signal ("tstp", SIGTSTP
);
6358 parse_signal ("cont", SIGCONT
);
6361 parse_signal ("chld", SIGCHLD
);
6364 parse_signal ("ttin", SIGTTIN
);
6367 parse_signal ("ttou", SIGTTOU
);
6370 parse_signal ("io", SIGIO
);
6373 parse_signal ("xcpu", SIGXCPU
);
6376 parse_signal ("xfsz", SIGXFSZ
);
6379 parse_signal ("vtalrm", SIGVTALRM
);
6382 parse_signal ("prof", SIGPROF
);
6385 parse_signal ("winch", SIGWINCH
);
6388 parse_signal ("info", SIGINFO
);
6391 error ("Undefined signal name %s", name
);
6396 return make_number (kill (pid
, XINT (sigcode
)));
6399 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6400 doc
: /* Make PROCESS see end-of-file in its input.
6401 EOF comes after any text already sent to it.
6402 PROCESS may be a process, a buffer, the name of a process or buffer, or
6403 nil, indicating the current buffer's process.
6404 If PROCESS is a network connection, or is a process communicating
6405 through a pipe (as opposed to a pty), then you cannot send any more
6406 text to PROCESS after you call this function. */)
6408 Lisp_Object process
;
6411 struct coding_system
*coding
;
6413 if (DATAGRAM_CONN_P (process
))
6416 proc
= get_process (process
);
6417 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6419 /* Make sure the process is really alive. */
6420 if (XPROCESS (proc
)->raw_status_new
)
6421 update_status (XPROCESS (proc
));
6422 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6423 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6425 if (CODING_REQUIRE_FLUSHING (coding
))
6427 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6428 send_process (proc
, "", 0, Qnil
);
6432 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6434 if (XPROCESS (proc
)->pty_flag
)
6435 send_process (proc
, "\004", 1, Qnil
);
6438 int old_outfd
, new_outfd
;
6440 #ifdef HAVE_SHUTDOWN
6441 /* If this is a network connection, or socketpair is used
6442 for communication with the subprocess, call shutdown to cause EOF.
6443 (In some old system, shutdown to socketpair doesn't work.
6444 Then we just can't win.) */
6445 if (XPROCESS (proc
)->pid
== 0
6446 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6447 shutdown (XPROCESS (proc
)->outfd
, 1);
6448 /* In case of socketpair, outfd == infd, so don't close it. */
6449 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6450 emacs_close (XPROCESS (proc
)->outfd
);
6451 #else /* not HAVE_SHUTDOWN */
6452 emacs_close (XPROCESS (proc
)->outfd
);
6453 #endif /* not HAVE_SHUTDOWN */
6454 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6457 old_outfd
= XPROCESS (proc
)->outfd
;
6459 if (!proc_encode_coding_system
[new_outfd
])
6460 proc_encode_coding_system
[new_outfd
]
6461 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6462 bcopy (proc_encode_coding_system
[old_outfd
],
6463 proc_encode_coding_system
[new_outfd
],
6464 sizeof (struct coding_system
));
6465 bzero (proc_encode_coding_system
[old_outfd
],
6466 sizeof (struct coding_system
));
6468 XPROCESS (proc
)->outfd
= new_outfd
;
6474 /* Kill all processes associated with `buffer'.
6475 If `buffer' is nil, kill all processes */
6478 kill_buffer_processes (buffer
)
6481 Lisp_Object tail
, proc
;
6483 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6485 proc
= XCDR (XCAR (tail
));
6486 if (GC_PROCESSP (proc
)
6487 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6489 if (NETCONN_P (proc
))
6490 Fdelete_process (proc
);
6491 else if (XPROCESS (proc
)->infd
>= 0)
6492 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6497 /* On receipt of a signal that a child status has changed, loop asking
6498 about children with changed statuses until the system says there
6501 All we do is change the status; we do not run sentinels or print
6502 notifications. That is saved for the next time keyboard input is
6503 done, in order to avoid timing errors.
6505 ** WARNING: this can be called during garbage collection.
6506 Therefore, it must not be fooled by the presence of mark bits in
6509 ** USG WARNING: Although it is not obvious from the documentation
6510 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6511 signal() before executing at least one wait(), otherwise the
6512 handler will be called again, resulting in an infinite loop. The
6513 relevant portion of the documentation reads "SIGCLD signals will be
6514 queued and the signal-catching function will be continually
6515 reentered until the queue is empty". Invoking signal() causes the
6516 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6519 ** Malloc WARNING: This should never call malloc either directly or
6520 indirectly; if it does, that is a bug */
6524 sigchld_handler (signo
)
6527 int old_errno
= errno
;
6529 register struct Lisp_Process
*p
;
6530 extern EMACS_TIME
*input_available_clear_time
;
6532 SIGNAL_THREAD_CHECK (signo
);
6536 sigheld
|= sigbit (SIGCHLD
);
6548 #endif /* no WUNTRACED */
6549 /* Keep trying to get a status until we get a definitive result. */
6553 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6555 while (pid
< 0 && errno
== EINTR
);
6559 /* PID == 0 means no processes found, PID == -1 means a real
6560 failure. We have done all our job, so return. */
6562 /* USG systems forget handlers when they are used;
6563 must reestablish each time */
6564 #if defined (USG) && !defined (POSIX_SIGNALS)
6565 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6568 sigheld
&= ~sigbit (SIGCHLD
);
6576 #endif /* no WNOHANG */
6578 /* Find the process that signaled us, and record its status. */
6580 /* The process can have been deleted by Fdelete_process. */
6581 for (tail
= deleted_pid_list
; GC_CONSP (tail
); tail
= XCDR (tail
))
6583 Lisp_Object xpid
= XCAR (tail
);
6584 if ((GC_INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6585 || (GC_FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6587 XSETCAR (tail
, Qnil
);
6588 goto sigchld_end_of_loop
;
6592 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6594 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6596 proc
= XCDR (XCAR (tail
));
6597 p
= XPROCESS (proc
);
6598 if (GC_EQ (p
->childp
, Qt
) && p
->pid
== pid
)
6603 /* Look for an asynchronous process whose pid hasn't been filled
6606 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6608 proc
= XCDR (XCAR (tail
));
6609 p
= XPROCESS (proc
);
6615 /* Change the status of the process that was found. */
6618 union { int i
; WAITTYPE wt
; } u
;
6619 int clear_desc_flag
= 0;
6621 p
->tick
= ++process_tick
;
6623 p
->raw_status
= u
.i
;
6624 p
->raw_status_new
= 1;
6626 /* If process has terminated, stop waiting for its output. */
6627 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6629 clear_desc_flag
= 1;
6631 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6632 if (clear_desc_flag
)
6634 FD_CLR (p
->infd
, &input_wait_mask
);
6635 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6638 /* Tell wait_reading_process_output that it needs to wake up and
6640 if (input_available_clear_time
)
6641 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6644 /* There was no asynchronous process found for that pid: we have
6645 a synchronous process. */
6648 synch_process_alive
= 0;
6650 /* Report the status of the synchronous process. */
6652 synch_process_retcode
= WRETCODE (w
);
6653 else if (WIFSIGNALED (w
))
6654 synch_process_termsig
= WTERMSIG (w
);
6656 /* Tell wait_reading_process_output that it needs to wake up and
6658 if (input_available_clear_time
)
6659 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6662 sigchld_end_of_loop
:
6665 /* On some systems, we must return right away.
6666 If any more processes want to signal us, we will
6668 Otherwise (on systems that have WNOHANG), loop around
6669 to use up all the processes that have something to tell us. */
6670 #if (defined WINDOWSNT \
6671 || (defined USG && !defined GNU_LINUX \
6672 && !(defined HPUX && defined WNOHANG)))
6673 #if defined (USG) && ! defined (POSIX_SIGNALS)
6674 signal (signo
, sigchld_handler
);
6678 #endif /* USG, but not HPUX with WNOHANG */
6681 #endif /* SIGCHLD */
6685 exec_sentinel_unwind (data
)
6688 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6693 exec_sentinel_error_handler (error
)
6696 cmd_error_internal (error
, "error in process sentinel: ");
6698 update_echo_area ();
6699 Fsleep_for (make_number (2), Qnil
);
6704 exec_sentinel (proc
, reason
)
6705 Lisp_Object proc
, reason
;
6707 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6708 register struct Lisp_Process
*p
= XPROCESS (proc
);
6709 int count
= SPECPDL_INDEX ();
6710 int outer_running_asynch_code
= running_asynch_code
;
6711 int waiting
= waiting_for_user_input_p
;
6713 if (inhibit_sentinels
)
6716 /* No need to gcpro these, because all we do with them later
6717 is test them for EQness, and none of them should be a string. */
6718 odeactivate
= Vdeactivate_mark
;
6719 XSETBUFFER (obuffer
, current_buffer
);
6720 okeymap
= current_buffer
->keymap
;
6722 sentinel
= p
->sentinel
;
6723 if (NILP (sentinel
))
6726 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6727 assure that it gets restored no matter how the sentinel exits. */
6729 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6730 /* Inhibit quit so that random quits don't screw up a running filter. */
6731 specbind (Qinhibit_quit
, Qt
);
6732 specbind (Qlast_nonmenu_event
, Qt
);
6734 /* In case we get recursively called,
6735 and we already saved the match data nonrecursively,
6736 save the same match data in safely recursive fashion. */
6737 if (outer_running_asynch_code
)
6740 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6741 restore_search_regs ();
6742 record_unwind_save_match_data ();
6743 Fset_match_data (tem
, Qt
);
6746 /* For speed, if a search happens within this code,
6747 save the match data in a special nonrecursive fashion. */
6748 running_asynch_code
= 1;
6750 internal_condition_case_1 (read_process_output_call
,
6752 Fcons (proc
, Fcons (reason
, Qnil
))),
6753 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6754 exec_sentinel_error_handler
);
6756 /* If we saved the match data nonrecursively, restore it now. */
6757 restore_search_regs ();
6758 running_asynch_code
= outer_running_asynch_code
;
6760 Vdeactivate_mark
= odeactivate
;
6762 /* Restore waiting_for_user_input_p as it was
6763 when we were called, in case the filter clobbered it. */
6764 waiting_for_user_input_p
= waiting
;
6767 if (! EQ (Fcurrent_buffer (), obuffer
)
6768 || ! EQ (current_buffer
->keymap
, okeymap
))
6770 /* But do it only if the caller is actually going to read events.
6771 Otherwise there's no need to make him wake up, and it could
6772 cause trouble (for example it would make sit_for return). */
6773 if (waiting_for_user_input_p
== -1)
6774 record_asynch_buffer_change ();
6776 unbind_to (count
, Qnil
);
6779 /* Report all recent events of a change in process status
6780 (either run the sentinel or output a message).
6781 This is usually done while Emacs is waiting for keyboard input
6782 but can be done at other times. */
6785 status_notify (deleting_process
)
6786 struct Lisp_Process
*deleting_process
;
6788 register Lisp_Object proc
, buffer
;
6789 Lisp_Object tail
, msg
;
6790 struct gcpro gcpro1
, gcpro2
;
6794 /* We need to gcpro tail; if read_process_output calls a filter
6795 which deletes a process and removes the cons to which tail points
6796 from Vprocess_alist, and then causes a GC, tail is an unprotected
6800 /* Set this now, so that if new processes are created by sentinels
6801 that we run, we get called again to handle their status changes. */
6802 update_tick
= process_tick
;
6804 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6807 register struct Lisp_Process
*p
;
6809 proc
= Fcdr (XCAR (tail
));
6810 p
= XPROCESS (proc
);
6812 if (p
->tick
!= p
->update_tick
)
6814 p
->update_tick
= p
->tick
;
6816 /* If process is still active, read any output that remains. */
6817 while (! EQ (p
->filter
, Qt
)
6818 && ! EQ (p
->status
, Qconnect
)
6819 && ! EQ (p
->status
, Qlisten
)
6820 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6822 && p
!= deleting_process
6823 && read_process_output (proc
, p
->infd
) > 0);
6827 /* Get the text to use for the message. */
6828 if (p
->raw_status_new
)
6830 msg
= status_message (p
);
6832 /* If process is terminated, deactivate it or delete it. */
6834 if (CONSP (p
->status
))
6835 symbol
= XCAR (p
->status
);
6837 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6838 || EQ (symbol
, Qclosed
))
6840 if (delete_exited_processes
)
6841 remove_process (proc
);
6843 deactivate_process (proc
);
6846 /* The actions above may have further incremented p->tick.
6847 So set p->update_tick again
6848 so that an error in the sentinel will not cause
6849 this code to be run again. */
6850 p
->update_tick
= p
->tick
;
6851 /* Now output the message suitably. */
6852 if (!NILP (p
->sentinel
))
6853 exec_sentinel (proc
, msg
);
6854 /* Don't bother with a message in the buffer
6855 when a process becomes runnable. */
6856 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6858 Lisp_Object ro
, tem
;
6859 struct buffer
*old
= current_buffer
;
6860 int opoint
, opoint_byte
;
6861 int before
, before_byte
;
6863 ro
= XBUFFER (buffer
)->read_only
;
6865 /* Avoid error if buffer is deleted
6866 (probably that's why the process is dead, too) */
6867 if (NILP (XBUFFER (buffer
)->name
))
6869 Fset_buffer (buffer
);
6872 opoint_byte
= PT_BYTE
;
6873 /* Insert new output into buffer
6874 at the current end-of-output marker,
6875 thus preserving logical ordering of input and output. */
6876 if (XMARKER (p
->mark
)->buffer
)
6877 Fgoto_char (p
->mark
);
6879 SET_PT_BOTH (ZV
, ZV_BYTE
);
6882 before_byte
= PT_BYTE
;
6884 tem
= current_buffer
->read_only
;
6885 current_buffer
->read_only
= Qnil
;
6886 insert_string ("\nProcess ");
6887 Finsert (1, &p
->name
);
6888 insert_string (" ");
6890 current_buffer
->read_only
= tem
;
6891 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6893 if (opoint
>= before
)
6894 SET_PT_BOTH (opoint
+ (PT
- before
),
6895 opoint_byte
+ (PT_BYTE
- before_byte
));
6897 SET_PT_BOTH (opoint
, opoint_byte
);
6899 set_buffer_internal (old
);
6904 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6905 redisplay_preserve_echo_area (13);
6911 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6912 Sset_process_coding_system
, 1, 3, 0,
6913 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6914 DECODING will be used to decode subprocess output and ENCODING to
6915 encode subprocess input. */)
6916 (process
, decoding
, encoding
)
6917 register Lisp_Object process
, decoding
, encoding
;
6919 register struct Lisp_Process
*p
;
6921 CHECK_PROCESS (process
);
6922 p
= XPROCESS (process
);
6924 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6926 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6927 Fcheck_coding_system (decoding
);
6928 Fcheck_coding_system (encoding
);
6930 p
->decode_coding_system
= decoding
;
6931 p
->encode_coding_system
= encoding
;
6932 setup_process_coding_systems (process
);
6937 DEFUN ("process-coding-system",
6938 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6939 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6941 register Lisp_Object process
;
6943 CHECK_PROCESS (process
);
6944 return Fcons (XPROCESS (process
)->decode_coding_system
,
6945 XPROCESS (process
)->encode_coding_system
);
6948 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6949 Sset_process_filter_multibyte
, 2, 2, 0,
6950 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6951 If FLAG is non-nil, the filter is given multibyte strings.
6952 If FLAG is nil, the filter is given unibyte strings. In this case,
6953 all character code conversion except for end-of-line conversion is
6956 Lisp_Object process
, flag
;
6958 register struct Lisp_Process
*p
;
6960 CHECK_PROCESS (process
);
6961 p
= XPROCESS (process
);
6962 p
->filter_multibyte
= !NILP (flag
);
6963 setup_process_coding_systems (process
);
6968 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6969 Sprocess_filter_multibyte_p
, 1, 1, 0,
6970 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6972 Lisp_Object process
;
6974 register struct Lisp_Process
*p
;
6976 CHECK_PROCESS (process
);
6977 p
= XPROCESS (process
);
6979 return (p
->filter_multibyte
? Qt
: Qnil
);
6984 /* Add DESC to the set of keyboard input descriptors. */
6987 add_keyboard_wait_descriptor (desc
)
6990 FD_SET (desc
, &input_wait_mask
);
6991 FD_SET (desc
, &non_process_wait_mask
);
6992 if (desc
> max_keyboard_desc
)
6993 max_keyboard_desc
= desc
;
6996 static int add_gpm_wait_descriptor_called_flag
;
6999 add_gpm_wait_descriptor (desc
)
7002 if (! add_gpm_wait_descriptor_called_flag
)
7003 FD_CLR (0, &input_wait_mask
);
7004 add_gpm_wait_descriptor_called_flag
= 1;
7005 FD_SET (desc
, &input_wait_mask
);
7006 FD_SET (desc
, &gpm_wait_mask
);
7007 if (desc
> max_gpm_desc
)
7008 max_gpm_desc
= desc
;
7011 /* From now on, do not expect DESC to give keyboard input. */
7014 delete_keyboard_wait_descriptor (desc
)
7018 int lim
= max_keyboard_desc
;
7020 FD_CLR (desc
, &input_wait_mask
);
7021 FD_CLR (desc
, &non_process_wait_mask
);
7023 if (desc
== max_keyboard_desc
)
7024 for (fd
= 0; fd
< lim
; fd
++)
7025 if (FD_ISSET (fd
, &input_wait_mask
)
7026 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7027 && !FD_ISSET (fd
, &gpm_wait_mask
))
7028 max_keyboard_desc
= fd
;
7032 delete_gpm_wait_descriptor (desc
)
7036 int lim
= max_gpm_desc
;
7038 FD_CLR (desc
, &input_wait_mask
);
7039 FD_CLR (desc
, &non_process_wait_mask
);
7041 if (desc
== max_gpm_desc
)
7042 for (fd
= 0; fd
< lim
; fd
++)
7043 if (FD_ISSET (fd
, &input_wait_mask
)
7044 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7045 && !FD_ISSET (fd
, &non_process_wait_mask
))
7049 /* Return nonzero if *MASK has a bit set
7050 that corresponds to one of the keyboard input descriptors. */
7053 keyboard_bit_set (mask
)
7058 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
7059 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7060 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7071 inhibit_sentinels
= 0;
7075 if (! noninteractive
|| initialized
)
7077 signal (SIGCHLD
, sigchld_handler
);
7080 FD_ZERO (&input_wait_mask
);
7081 FD_ZERO (&non_keyboard_wait_mask
);
7082 FD_ZERO (&non_process_wait_mask
);
7083 max_process_desc
= 0;
7085 #ifdef NON_BLOCKING_CONNECT
7086 FD_ZERO (&connect_wait_mask
);
7087 num_pending_connects
= 0;
7090 #ifdef ADAPTIVE_READ_BUFFERING
7091 process_output_delay_count
= 0;
7092 process_output_skip
= 0;
7095 /* Don't do this, it caused infinite select loops. The display
7096 method should call add_keyboard_wait_descriptor on stdin if it
7099 FD_SET (0, &input_wait_mask
);
7102 Vprocess_alist
= Qnil
;
7104 deleted_pid_list
= Qnil
;
7106 for (i
= 0; i
< MAXDESC
; i
++)
7108 chan_process
[i
] = Qnil
;
7109 proc_buffered_char
[i
] = -1;
7111 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
7112 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
7113 #ifdef DATAGRAM_SOCKETS
7114 bzero (datagram_address
, sizeof datagram_address
);
7119 Lisp_Object subfeatures
= Qnil
;
7120 struct socket_options
*sopt
;
7122 #define ADD_SUBFEATURE(key, val) \
7123 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
7125 #ifdef NON_BLOCKING_CONNECT
7126 ADD_SUBFEATURE (QCnowait
, Qt
);
7128 #ifdef DATAGRAM_SOCKETS
7129 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7131 #ifdef HAVE_LOCAL_SOCKETS
7132 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7134 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7136 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7138 #ifdef HAVE_GETSOCKNAME
7139 ADD_SUBFEATURE (QCservice
, Qt
);
7141 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
7142 ADD_SUBFEATURE (QCserver
, Qt
);
7145 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7146 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
7148 Fprovide (intern ("make-network-process"), subfeatures
);
7150 #endif /* HAVE_SOCKETS */
7152 #if defined (DARWIN) || defined (MAC_OSX)
7153 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7154 processes. As such, we only change the default value. */
7157 char *release
= get_operating_system_release();
7158 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7159 && release
[1] == '.')) {
7160 Vprocess_connection_type
= Qnil
;
7169 Qprocessp
= intern ("processp");
7170 staticpro (&Qprocessp
);
7171 Qrun
= intern ("run");
7173 Qstop
= intern ("stop");
7175 Qsignal
= intern ("signal");
7176 staticpro (&Qsignal
);
7178 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7181 Qexit = intern ("exit");
7182 staticpro (&Qexit); */
7184 Qopen
= intern ("open");
7186 Qclosed
= intern ("closed");
7187 staticpro (&Qclosed
);
7188 Qconnect
= intern ("connect");
7189 staticpro (&Qconnect
);
7190 Qfailed
= intern ("failed");
7191 staticpro (&Qfailed
);
7192 Qlisten
= intern ("listen");
7193 staticpro (&Qlisten
);
7194 Qlocal
= intern ("local");
7195 staticpro (&Qlocal
);
7196 Qipv4
= intern ("ipv4");
7199 Qipv6
= intern ("ipv6");
7202 Qdatagram
= intern ("datagram");
7203 staticpro (&Qdatagram
);
7205 QCname
= intern (":name");
7206 staticpro (&QCname
);
7207 QCbuffer
= intern (":buffer");
7208 staticpro (&QCbuffer
);
7209 QChost
= intern (":host");
7210 staticpro (&QChost
);
7211 QCservice
= intern (":service");
7212 staticpro (&QCservice
);
7213 QCtype
= intern (":type");
7214 staticpro (&QCtype
);
7215 QClocal
= intern (":local");
7216 staticpro (&QClocal
);
7217 QCremote
= intern (":remote");
7218 staticpro (&QCremote
);
7219 QCcoding
= intern (":coding");
7220 staticpro (&QCcoding
);
7221 QCserver
= intern (":server");
7222 staticpro (&QCserver
);
7223 QCnowait
= intern (":nowait");
7224 staticpro (&QCnowait
);
7225 QCsentinel
= intern (":sentinel");
7226 staticpro (&QCsentinel
);
7227 QClog
= intern (":log");
7229 QCnoquery
= intern (":noquery");
7230 staticpro (&QCnoquery
);
7231 QCstop
= intern (":stop");
7232 staticpro (&QCstop
);
7233 QCoptions
= intern (":options");
7234 staticpro (&QCoptions
);
7235 QCplist
= intern (":plist");
7236 staticpro (&QCplist
);
7237 QCfilter_multibyte
= intern (":filter-multibyte");
7238 staticpro (&QCfilter_multibyte
);
7240 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
7241 staticpro (&Qlast_nonmenu_event
);
7243 staticpro (&Vprocess_alist
);
7245 staticpro (&deleted_pid_list
);
7248 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
7249 doc
: /* *Non-nil means delete processes immediately when they exit.
7250 A value of nil means don't delete them until `list-processes' is run. */);
7252 delete_exited_processes
= 1;
7254 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
7255 doc
: /* Control type of device used to communicate with subprocesses.
7256 Values are nil to use a pipe, or t or `pty' to use a pty.
7257 The value has no effect if the system has no ptys or if all ptys are busy:
7258 then a pipe is used in any case.
7259 The value takes effect when `start-process' is called. */);
7260 Vprocess_connection_type
= Qt
;
7262 #ifdef ADAPTIVE_READ_BUFFERING
7263 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
7264 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7265 On some systems, when Emacs reads the output from a subprocess, the output data
7266 is read in very small blocks, potentially resulting in very poor performance.
7267 This behavior can be remedied to some extent by setting this variable to a
7268 non-nil value, as it will automatically delay reading from such processes, to
7269 allow them to produce more output before Emacs tries to read it.
7270 If the value is t, the delay is reset after each write to the process; any other
7271 non-nil value means that the delay is not reset on write.
7272 The variable takes effect when `start-process' is called. */);
7273 Vprocess_adaptive_read_buffering
= Qt
;
7276 defsubr (&Sprocessp
);
7277 defsubr (&Sget_process
);
7278 defsubr (&Sget_buffer_process
);
7279 defsubr (&Sdelete_process
);
7280 defsubr (&Sprocess_status
);
7281 defsubr (&Sprocess_exit_status
);
7282 defsubr (&Sprocess_id
);
7283 defsubr (&Sprocess_name
);
7284 defsubr (&Sprocess_tty_name
);
7285 defsubr (&Sprocess_command
);
7286 defsubr (&Sset_process_buffer
);
7287 defsubr (&Sprocess_buffer
);
7288 defsubr (&Sprocess_mark
);
7289 defsubr (&Sset_process_filter
);
7290 defsubr (&Sprocess_filter
);
7291 defsubr (&Sset_process_sentinel
);
7292 defsubr (&Sprocess_sentinel
);
7293 defsubr (&Sset_process_window_size
);
7294 defsubr (&Sset_process_inherit_coding_system_flag
);
7295 defsubr (&Sprocess_inherit_coding_system_flag
);
7296 defsubr (&Sset_process_query_on_exit_flag
);
7297 defsubr (&Sprocess_query_on_exit_flag
);
7298 defsubr (&Sprocess_contact
);
7299 defsubr (&Sprocess_plist
);
7300 defsubr (&Sset_process_plist
);
7301 defsubr (&Slist_processes
);
7302 defsubr (&Sprocess_list
);
7303 defsubr (&Sstart_process
);
7305 defsubr (&Sset_network_process_option
);
7306 defsubr (&Smake_network_process
);
7307 defsubr (&Sformat_network_address
);
7308 #endif /* HAVE_SOCKETS */
7309 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
7311 defsubr (&Snetwork_interface_list
);
7313 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7314 defsubr (&Snetwork_interface_info
);
7316 #endif /* HAVE_SOCKETS ... */
7317 #ifdef DATAGRAM_SOCKETS
7318 defsubr (&Sprocess_datagram_address
);
7319 defsubr (&Sset_process_datagram_address
);
7321 defsubr (&Saccept_process_output
);
7322 defsubr (&Sprocess_send_region
);
7323 defsubr (&Sprocess_send_string
);
7324 defsubr (&Sinterrupt_process
);
7325 defsubr (&Skill_process
);
7326 defsubr (&Squit_process
);
7327 defsubr (&Sstop_process
);
7328 defsubr (&Scontinue_process
);
7329 defsubr (&Sprocess_running_child_p
);
7330 defsubr (&Sprocess_send_eof
);
7331 defsubr (&Ssignal_process
);
7332 defsubr (&Swaiting_for_user_input_p
);
7333 /* defsubr (&Sprocess_connection); */
7334 defsubr (&Sset_process_coding_system
);
7335 defsubr (&Sprocess_coding_system
);
7336 defsubr (&Sset_process_filter_multibyte
);
7337 defsubr (&Sprocess_filter_multibyte_p
);
7341 #else /* not subprocesses */
7343 #include <sys/types.h>
7347 #include "systime.h"
7348 #include "charset.h"
7350 #include "termopts.h"
7351 #include "sysselect.h"
7353 extern int frame_garbaged
;
7355 extern EMACS_TIME
timer_check ();
7356 extern int timers_run
;
7360 /* As described above, except assuming that there are no subprocesses:
7362 Wait for timeout to elapse and/or keyboard input to be available.
7365 timeout in seconds, or
7366 zero for no limit, or
7367 -1 means gobble data immediately available but don't wait for any.
7369 read_kbd is a Lisp_Object:
7370 0 to ignore keyboard input, or
7371 1 to return when input is available, or
7372 -1 means caller will actually read the input, so don't throw to
7375 see full version for other parameters. We know that wait_proc will
7376 always be NULL, since `subprocesses' isn't defined.
7378 do_display != 0 means redisplay should be done to show subprocess
7379 output that arrives.
7381 Return true if we received input from any process. */
7384 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
7385 wait_for_cell
, wait_proc
, just_wait_proc
)
7386 int time_limit
, microsecs
, read_kbd
, do_display
;
7387 Lisp_Object wait_for_cell
;
7388 struct Lisp_Process
*wait_proc
;
7392 EMACS_TIME end_time
, timeout
;
7393 SELECT_TYPE waitchannels
;
7396 /* What does time_limit really mean? */
7397 if (time_limit
|| microsecs
)
7399 EMACS_GET_TIME (end_time
);
7400 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
7401 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
7404 /* Turn off periodic alarms (in case they are in use)
7405 and then turn off any other atimers,
7406 because the select emulator uses alarms. */
7408 turn_on_atimers (0);
7412 int timeout_reduced_for_timers
= 0;
7414 /* If calling from keyboard input, do not quit
7415 since we want to return C-g as an input character.
7416 Otherwise, do pending quit if requested. */
7420 /* Exit now if the cell we're waiting for became non-nil. */
7421 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7424 /* Compute time from now till when time limit is up */
7425 /* Exit if already run out */
7426 if (time_limit
== -1)
7428 /* -1 specified for timeout means
7429 gobble output available now
7430 but don't wait at all. */
7432 EMACS_SET_SECS_USECS (timeout
, 0, 0);
7434 else if (time_limit
|| microsecs
)
7436 EMACS_GET_TIME (timeout
);
7437 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
7438 if (EMACS_TIME_NEG_P (timeout
))
7443 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7446 /* If our caller will not immediately handle keyboard events,
7447 run timer events directly.
7448 (Callers that will immediately read keyboard events
7449 call timer_delay on their own.) */
7450 if (NILP (wait_for_cell
))
7452 EMACS_TIME timer_delay
;
7456 int old_timers_run
= timers_run
;
7457 timer_delay
= timer_check (1);
7458 if (timers_run
!= old_timers_run
&& do_display
)
7459 /* We must retry, since a timer may have requeued itself
7460 and that could alter the time delay. */
7461 redisplay_preserve_echo_area (14);
7465 while (!detect_input_pending ());
7467 /* If there is unread keyboard input, also return. */
7469 && requeued_events_pending_p ())
7472 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7474 EMACS_TIME difference
;
7475 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7476 if (EMACS_TIME_NEG_P (difference
))
7478 timeout
= timer_delay
;
7479 timeout_reduced_for_timers
= 1;
7484 /* Cause C-g and alarm signals to take immediate action,
7485 and cause input available signals to zero out timeout. */
7487 set_waiting_for_input (&timeout
);
7489 /* Wait till there is something to do. */
7491 if (! read_kbd
&& NILP (wait_for_cell
))
7492 FD_ZERO (&waitchannels
);
7494 FD_SET (0, &waitchannels
);
7496 /* If a frame has been newly mapped and needs updating,
7497 reprocess its display stuff. */
7498 if (frame_garbaged
&& do_display
)
7500 clear_waiting_for_input ();
7501 redisplay_preserve_echo_area (15);
7503 set_waiting_for_input (&timeout
);
7506 if (read_kbd
&& detect_input_pending ())
7509 FD_ZERO (&waitchannels
);
7512 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7517 /* Make C-g and alarm signals set flags again */
7518 clear_waiting_for_input ();
7520 /* If we woke up due to SIGWINCH, actually change size now. */
7521 do_pending_window_change (0);
7523 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7524 /* We waited the full specified time, so return now. */
7529 /* If the system call was interrupted, then go around the
7531 if (xerrno
== EINTR
)
7532 FD_ZERO (&waitchannels
);
7534 error ("select error: %s", emacs_strerror (xerrno
));
7537 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7538 /* System sometimes fails to deliver SIGIO. */
7539 kill (getpid (), SIGIO
);
7542 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7543 kill (getpid (), SIGIO
);
7546 /* Check for keyboard input */
7549 && detect_input_pending_run_timers (do_display
))
7551 swallow_events (do_display
);
7552 if (detect_input_pending_run_timers (do_display
))
7556 /* If there is unread keyboard input, also return. */
7558 && requeued_events_pending_p ())
7561 /* If wait_for_cell. check for keyboard input
7562 but don't run any timers.
7563 ??? (It seems wrong to me to check for keyboard
7564 input at all when wait_for_cell, but the code
7565 has been this way since July 1994.
7566 Try changing this after version 19.31.) */
7567 if (! NILP (wait_for_cell
)
7568 && detect_input_pending ())
7570 swallow_events (do_display
);
7571 if (detect_input_pending ())
7575 /* Exit now if the cell we're waiting for became non-nil. */
7576 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7586 /* Don't confuse make-docfile by having two doc strings for this function.
7587 make-docfile does not pay attention to #if, for good reason! */
7588 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7591 register Lisp_Object name
;
7596 /* Don't confuse make-docfile by having two doc strings for this function.
7597 make-docfile does not pay attention to #if, for good reason! */
7598 DEFUN ("process-inherit-coding-system-flag",
7599 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7603 register Lisp_Object process
;
7605 /* Ignore the argument and return the value of
7606 inherit-process-coding-system. */
7607 return inherit_process_coding_system
? Qt
: Qnil
;
7610 /* Kill all processes associated with `buffer'.
7611 If `buffer' is nil, kill all processes.
7612 Since we have no subprocesses, this does nothing. */
7615 kill_buffer_processes (buffer
)
7628 QCtype
= intern (":type");
7629 staticpro (&QCtype
);
7631 defsubr (&Sget_buffer_process
);
7632 defsubr (&Sprocess_inherit_coding_system_flag
);
7636 #endif /* not subprocesses */
7638 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7639 (do not change this comment) */