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>
134 #include "termhooks.h"
135 #include "termopts.h"
136 #include "commands.h"
137 #include "keyboard.h"
138 #include "blockinput.h"
139 #include "dispextern.h"
140 #include "composite.h"
143 Lisp_Object Qprocessp
;
144 Lisp_Object Qrun
, Qstop
, Qsignal
;
145 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
146 Lisp_Object Qlocal
, Qipv4
, Qdatagram
;
150 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
151 Lisp_Object QClocal
, QCremote
, QCcoding
;
152 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
153 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
154 Lisp_Object QCfilter_multibyte
;
155 Lisp_Object Qlast_nonmenu_event
;
156 /* QCfamily is declared and initialized in xfaces.c,
157 QCfilter in keyboard.c. */
158 extern Lisp_Object QCfamily
, QCfilter
;
160 /* Qexit is declared and initialized in eval.c. */
162 /* QCfamily is defined in xfaces.c. */
163 extern Lisp_Object QCfamily
;
164 /* QCfilter is defined in keyboard.c. */
165 extern Lisp_Object QCfilter
;
167 /* a process object is a network connection when its childp field is neither
168 Qt nor Qnil but is instead a property list (KEY VAL ...). */
171 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
172 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
174 #define NETCONN_P(p) 0
175 #define NETCONN1_P(p) 0
176 #endif /* HAVE_SOCKETS */
178 /* Define first descriptor number available for subprocesses. */
180 #define FIRST_PROC_DESC 1
182 #define FIRST_PROC_DESC 3
185 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
188 #if !defined (SIGCHLD) && defined (SIGCLD)
189 #define SIGCHLD SIGCLD
192 #include "syssignal.h"
196 extern char *get_operating_system_release ();
202 extern char *sys_errlist
[];
209 /* t means use pty, nil means use a pipe,
210 maybe other values to come. */
211 static Lisp_Object Vprocess_connection_type
;
215 #include <sys/socket.h>
219 /* These next two vars are non-static since sysdep.c uses them in the
220 emulation of `select'. */
221 /* Number of events of change of status of a process. */
223 /* Number of events for which the user or sentinel has been notified. */
226 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
228 #ifdef BROKEN_NON_BLOCKING_CONNECT
229 #undef NON_BLOCKING_CONNECT
231 #ifndef NON_BLOCKING_CONNECT
234 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
235 #if defined (O_NONBLOCK) || defined (O_NDELAY)
236 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
237 #define NON_BLOCKING_CONNECT
238 #endif /* EWOULDBLOCK || EINPROGRESS */
239 #endif /* O_NONBLOCK || O_NDELAY */
240 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
241 #endif /* HAVE_SELECT */
242 #endif /* HAVE_SOCKETS */
243 #endif /* NON_BLOCKING_CONNECT */
244 #endif /* BROKEN_NON_BLOCKING_CONNECT */
246 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
247 this system. We need to read full packets, so we need a
248 "non-destructive" select. So we require either native select,
249 or emulation of select using FIONREAD. */
251 #ifdef BROKEN_DATAGRAM_SOCKETS
252 #undef DATAGRAM_SOCKETS
254 #ifndef DATAGRAM_SOCKETS
256 #if defined (HAVE_SELECT) || defined (FIONREAD)
257 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
258 #define DATAGRAM_SOCKETS
259 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
260 #endif /* HAVE_SELECT || FIONREAD */
261 #endif /* HAVE_SOCKETS */
262 #endif /* DATAGRAM_SOCKETS */
263 #endif /* BROKEN_DATAGRAM_SOCKETS */
266 #undef NON_BLOCKING_CONNECT
267 #undef DATAGRAM_SOCKETS
270 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
271 #ifdef EMACS_HAS_USECS
272 #define ADAPTIVE_READ_BUFFERING
276 #ifdef ADAPTIVE_READ_BUFFERING
277 #define READ_OUTPUT_DELAY_INCREMENT 10000
278 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
279 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
281 /* Number of processes which have a non-zero read_output_delay,
282 and therefore might be delayed for adaptive read buffering. */
284 static int process_output_delay_count
;
286 /* Non-zero if any process has non-nil read_output_skip. */
288 static int process_output_skip
;
290 /* Non-nil means to delay reading process output to improve buffering.
291 A value of t means that delay is reset after each send, any other
292 non-nil value does not reset the delay. A value of nil disables
293 adaptive read buffering completely. */
294 static Lisp_Object Vprocess_adaptive_read_buffering
;
296 #define process_output_delay_count 0
300 #include "sysselect.h"
302 static int keyboard_bit_set
P_ ((SELECT_TYPE
*));
303 static void deactivate_process
P_ ((Lisp_Object
));
304 static void status_notify
P_ ((struct Lisp_Process
*));
305 static int read_process_output
P_ ((Lisp_Object
, int));
307 /* If we support a window system, turn on the code to poll periodically
308 to detect C-g. It isn't actually used when doing interrupt input. */
309 #ifdef HAVE_WINDOW_SYSTEM
310 #define POLL_FOR_INPUT
313 static Lisp_Object
get_process ();
314 static void exec_sentinel ();
316 extern EMACS_TIME
timer_check ();
317 extern int timers_run
;
319 /* Mask of bits indicating the descriptors that we wait for input on. */
321 static SELECT_TYPE input_wait_mask
;
323 /* Mask that excludes keyboard input descriptor(s). */
325 static SELECT_TYPE non_keyboard_wait_mask
;
327 /* Mask that excludes process input descriptor(s). */
329 static SELECT_TYPE non_process_wait_mask
;
331 /* Mask for the gpm mouse input descriptor. */
333 static SELECT_TYPE gpm_wait_mask
;
335 #ifdef NON_BLOCKING_CONNECT
336 /* Mask of bits indicating the descriptors that we wait for connect to
337 complete on. Once they complete, they are removed from this mask
338 and added to the input_wait_mask and non_keyboard_wait_mask. */
340 static SELECT_TYPE connect_wait_mask
;
342 /* Number of bits set in connect_wait_mask. */
343 static int num_pending_connects
;
345 #define IF_NON_BLOCKING_CONNECT(s) s
347 #define IF_NON_BLOCKING_CONNECT(s)
350 /* The largest descriptor currently in use for a process object. */
351 static int max_process_desc
;
353 /* The largest descriptor currently in use for keyboard input. */
354 static int max_keyboard_desc
;
356 /* The largest descriptor currently in use for gpm mouse input. */
357 static int max_gpm_desc
;
359 /* Nonzero means delete a process right away if it exits. */
360 static int delete_exited_processes
;
362 /* Indexed by descriptor, gives the process (if any) for that descriptor */
363 Lisp_Object chan_process
[MAXDESC
];
365 /* Alist of elements (NAME . PROCESS) */
366 Lisp_Object Vprocess_alist
;
368 /* Buffered-ahead input char from process, indexed by channel.
369 -1 means empty (no char is buffered).
370 Used on sys V where the only way to tell if there is any
371 output from the process is to read at least one char.
372 Always -1 on systems that support FIONREAD. */
374 /* Don't make static; need to access externally. */
375 int proc_buffered_char
[MAXDESC
];
377 /* Table of `struct coding-system' for each process. */
378 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
379 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
381 #ifdef DATAGRAM_SOCKETS
382 /* Table of `partner address' for datagram sockets. */
383 struct sockaddr_and_len
{
386 } datagram_address
[MAXDESC
];
387 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
388 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
390 #define DATAGRAM_CHAN_P(chan) (0)
391 #define DATAGRAM_CONN_P(proc) (0)
394 /* Maximum number of bytes to send to a pty without an eof. */
395 static int pty_max_bytes
;
397 /* Nonzero means don't run process sentinels. This is used
399 int inhibit_sentinels
;
405 /* The file name of the pty opened by allocate_pty. */
407 static char pty_name
[24];
410 /* Compute the Lisp form of the process status, p->status, from
411 the numeric status that was returned by `wait'. */
413 static Lisp_Object
status_convert ();
417 struct Lisp_Process
*p
;
419 union { int i
; WAITTYPE wt
; } u
;
420 eassert (p
->raw_status_new
);
422 p
->status
= status_convert (u
.wt
);
423 p
->raw_status_new
= 0;
426 /* Convert a process status word in Unix format to
427 the list that we use internally. */
434 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
435 else if (WIFEXITED (w
))
436 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
437 WCOREDUMP (w
) ? Qt
: Qnil
));
438 else if (WIFSIGNALED (w
))
439 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
440 WCOREDUMP (w
) ? Qt
: Qnil
));
445 /* Given a status-list, extract the three pieces of information
446 and store them individually through the three pointers. */
449 decode_status (l
, symbol
, code
, coredump
)
467 *code
= XFASTINT (XCAR (tem
));
469 *coredump
= !NILP (tem
);
473 /* Return a string describing a process status list. */
477 struct Lisp_Process
*p
;
479 Lisp_Object status
= p
->status
;
482 Lisp_Object string
, string2
;
484 decode_status (status
, &symbol
, &code
, &coredump
);
486 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
489 synchronize_system_messages_locale ();
490 signame
= strsignal (code
);
493 string
= build_string (signame
);
494 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
495 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
496 return concat2 (string
, string2
);
498 else if (EQ (symbol
, Qexit
))
501 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
503 return build_string ("finished\n");
504 string
= Fnumber_to_string (make_number (code
));
505 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
506 return concat3 (build_string ("exited abnormally with code "),
509 else if (EQ (symbol
, Qfailed
))
511 string
= Fnumber_to_string (make_number (code
));
512 string2
= build_string ("\n");
513 return concat3 (build_string ("failed with code "),
517 return Fcopy_sequence (Fsymbol_name (symbol
));
522 /* Open an available pty, returning a file descriptor.
523 Return -1 on failure.
524 The file name of the terminal corresponding to the pty
525 is left in the variable pty_name. */
536 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
537 for (i
= 0; i
< 16; i
++)
540 struct stat stb
; /* Used in some PTY_OPEN. */
541 #ifdef PTY_NAME_SPRINTF
544 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
545 #endif /* no PTY_NAME_SPRINTF */
549 #else /* no PTY_OPEN */
552 /* Unusual IRIS code */
553 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
556 if (fstat (fd
, &stb
) < 0)
558 # else /* not IRIS */
559 { /* Some systems name their pseudoterminals so that there are gaps in
560 the usual sequence - for example, on HP9000/S700 systems, there
561 are no pseudoterminals with names ending in 'f'. So we wait for
562 three failures in a row before deciding that we've reached the
564 int failed_count
= 0;
566 if (stat (pty_name
, &stb
) < 0)
569 if (failed_count
>= 3)
576 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
578 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
580 # endif /* not IRIS */
582 #endif /* no PTY_OPEN */
586 /* check to make certain that both sides are available
587 this avoids a nasty yet stupid bug in rlogins */
588 #ifdef PTY_TTY_NAME_SPRINTF
591 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
592 #endif /* no PTY_TTY_NAME_SPRINTF */
594 if (access (pty_name
, 6) != 0)
597 # if !defined(IRIS) && !defined(__sgi)
603 #endif /* not UNIPLUS */
610 #endif /* HAVE_PTYS */
616 register Lisp_Object val
, tem
, name1
;
617 register struct Lisp_Process
*p
;
621 p
= allocate_process ();
628 p
->raw_status_new
= 0;
630 p
->mark
= Fmake_marker ();
632 #ifdef ADAPTIVE_READ_BUFFERING
633 p
->adaptive_read_buffering
= 0;
634 p
->read_output_delay
= 0;
635 p
->read_output_skip
= 0;
638 /* If name is already in use, modify it until it is unused. */
643 tem
= Fget_process (name1
);
644 if (NILP (tem
)) break;
645 sprintf (suffix
, "<%d>", i
);
646 name1
= concat2 (name
, build_string (suffix
));
650 XSETPROCESS (val
, p
);
651 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
656 remove_process (proc
)
657 register Lisp_Object proc
;
659 register Lisp_Object pair
;
661 pair
= Frassq (proc
, Vprocess_alist
);
662 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
664 deactivate_process (proc
);
667 /* Setup coding systems of PROCESS. */
670 setup_process_coding_systems (process
)
673 struct Lisp_Process
*p
= XPROCESS (process
);
675 int outch
= p
->outfd
;
677 if (inch
< 0 || outch
< 0)
680 if (!proc_decode_coding_system
[inch
])
681 proc_decode_coding_system
[inch
]
682 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
683 setup_coding_system (p
->decode_coding_system
,
684 proc_decode_coding_system
[inch
]);
685 if (! NILP (p
->filter
))
687 if (!p
->filter_multibyte
)
688 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
690 else if (BUFFERP (p
->buffer
))
692 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
693 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
696 if (!proc_encode_coding_system
[outch
])
697 proc_encode_coding_system
[outch
]
698 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
699 setup_coding_system (p
->encode_coding_system
,
700 proc_encode_coding_system
[outch
]);
701 if (proc_encode_coding_system
[outch
]->eol_type
== CODING_EOL_UNDECIDED
)
702 proc_encode_coding_system
[outch
]->eol_type
= system_eol_type
;
705 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
706 doc
: /* Return t if OBJECT is a process. */)
710 return PROCESSP (object
) ? Qt
: Qnil
;
713 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
714 doc
: /* Return the process named NAME, or nil if there is none. */)
716 register Lisp_Object name
;
721 return Fcdr (Fassoc (name
, Vprocess_alist
));
724 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
725 doc
: /* Return the (or a) process associated with BUFFER.
726 BUFFER may be a buffer or the name of one. */)
728 register Lisp_Object buffer
;
730 register Lisp_Object buf
, tail
, proc
;
732 if (NILP (buffer
)) return Qnil
;
733 buf
= Fget_buffer (buffer
);
734 if (NILP (buf
)) return Qnil
;
736 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
738 proc
= Fcdr (Fcar (tail
));
739 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
745 /* This is how commands for the user decode process arguments. It
746 accepts a process, a process name, a buffer, a buffer name, or nil.
747 Buffers denote the first process in the buffer, and nil denotes the
752 register Lisp_Object name
;
754 register Lisp_Object proc
, obj
;
757 obj
= Fget_process (name
);
759 obj
= Fget_buffer (name
);
761 error ("Process %s does not exist", SDATA (name
));
763 else if (NILP (name
))
764 obj
= Fcurrent_buffer ();
768 /* Now obj should be either a buffer object or a process object.
772 proc
= Fget_buffer_process (obj
);
774 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
786 /* Fdelete_process promises to immediately forget about the process, but in
787 reality, Emacs needs to remember those processes until they have been
788 treated by sigchld_handler; otherwise this handler would consider the
789 process as being synchronous and say that the synchronous process is
791 static Lisp_Object deleted_pid_list
;
794 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
795 doc
: /* Delete PROCESS: kill it and forget about it immediately.
796 PROCESS may be a process, a buffer, the name of a process or buffer, or
797 nil, indicating the current buffer's process. */)
799 register Lisp_Object process
;
801 register struct Lisp_Process
*p
;
803 process
= get_process (process
);
804 p
= XPROCESS (process
);
806 p
->raw_status_new
= 0;
809 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
810 p
->tick
= ++process_tick
;
813 else if (p
->infd
>= 0)
817 /* Assignment to EMACS_INT stops GCC whining about limited range
819 EMACS_INT pid
= p
->pid
;
821 /* No problem storing the pid here, as it is still in Vprocess_alist. */
822 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
823 /* GC treated elements set to nil. */
824 Fdelq (Qnil
, deleted_pid_list
));
825 /* If the process has already signaled, remove it from the list. */
826 if (p
->raw_status_new
)
829 if (CONSP (p
->status
))
830 symbol
= XCAR (p
->status
);
831 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
833 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
837 Fkill_process (process
, Qnil
);
838 /* Do this now, since remove_process will make sigchld_handler do nothing. */
840 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
841 p
->tick
= ++process_tick
;
845 remove_process (process
);
849 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
850 doc
: /* Return the status of PROCESS.
851 The returned value is one of the following symbols:
852 run -- for a process that is running.
853 stop -- for a process stopped but continuable.
854 exit -- for a process that has exited.
855 signal -- for a process that has got a fatal signal.
856 open -- for a network stream connection that is open.
857 listen -- for a network stream server that is listening.
858 closed -- for a network stream connection that is closed.
859 connect -- when waiting for a non-blocking connection to complete.
860 failed -- when a non-blocking connection has failed.
861 nil -- if arg is a process name and no such process exists.
862 PROCESS may be a process, a buffer, the name of a process, or
863 nil, indicating the current buffer's process. */)
865 register Lisp_Object process
;
867 register struct Lisp_Process
*p
;
868 register Lisp_Object status
;
870 if (STRINGP (process
))
871 process
= Fget_process (process
);
873 process
= get_process (process
);
878 p
= XPROCESS (process
);
879 if (p
->raw_status_new
)
883 status
= XCAR (status
);
886 if (EQ (status
, Qexit
))
888 else if (EQ (p
->command
, Qt
))
890 else if (EQ (status
, Qrun
))
896 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
898 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
899 If PROCESS has not yet exited or died, return 0. */)
901 register Lisp_Object process
;
903 CHECK_PROCESS (process
);
904 if (XPROCESS (process
)->raw_status_new
)
905 update_status (XPROCESS (process
));
906 if (CONSP (XPROCESS (process
)->status
))
907 return XCAR (XCDR (XPROCESS (process
)->status
));
908 return make_number (0);
911 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
912 doc
: /* Return the process id of PROCESS.
913 This is the pid of the external process which PROCESS uses or talks to.
914 For a network connection, this value is nil. */)
916 register Lisp_Object process
;
918 /* Assignment to EMACS_INT stops GCC whining about limited range of
922 CHECK_PROCESS (process
);
923 pid
= XPROCESS (process
)->pid
;
924 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
927 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
928 doc
: /* Return the name of PROCESS, as a string.
929 This is the name of the program invoked in PROCESS,
930 possibly modified to make it unique among process names. */)
932 register Lisp_Object process
;
934 CHECK_PROCESS (process
);
935 return XPROCESS (process
)->name
;
938 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
939 doc
: /* Return the command that was executed to start PROCESS.
940 This is a list of strings, the first string being the program executed
941 and the rest of the strings being the arguments given to it.
942 For a non-child channel, this is nil. */)
944 register Lisp_Object process
;
946 CHECK_PROCESS (process
);
947 return XPROCESS (process
)->command
;
950 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
951 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
952 This is the terminal that the process itself reads and writes on,
953 not the name of the pty that Emacs uses to talk with that terminal. */)
955 register Lisp_Object process
;
957 CHECK_PROCESS (process
);
958 return XPROCESS (process
)->tty_name
;
961 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
963 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
965 register Lisp_Object process
, buffer
;
967 struct Lisp_Process
*p
;
969 CHECK_PROCESS (process
);
971 CHECK_BUFFER (buffer
);
972 p
= XPROCESS (process
);
975 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
976 setup_process_coding_systems (process
);
980 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
982 doc
: /* Return the buffer PROCESS is associated with.
983 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
985 register Lisp_Object process
;
987 CHECK_PROCESS (process
);
988 return XPROCESS (process
)->buffer
;
991 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
993 doc
: /* Return the marker for the end of the last output from PROCESS. */)
995 register Lisp_Object process
;
997 CHECK_PROCESS (process
);
998 return XPROCESS (process
)->mark
;
1001 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1003 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1004 t means stop accepting output from the process.
1006 When a process has a filter, its buffer is not used for output.
1007 Instead, each time it does output, the entire string of output is
1008 passed to the filter.
1010 The filter gets two arguments: the process and the string of output.
1011 The string argument is normally a multibyte string, except:
1012 - if the process' input coding system is no-conversion or raw-text,
1013 it is a unibyte string (the non-converted input), or else
1014 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1015 string (the result of converting the decoded input multibyte
1016 string to unibyte with `string-make-unibyte'). */)
1018 register Lisp_Object process
, filter
;
1020 struct Lisp_Process
*p
;
1022 CHECK_PROCESS (process
);
1023 p
= XPROCESS (process
);
1025 /* Don't signal an error if the process' input file descriptor
1026 is closed. This could make debugging Lisp more difficult,
1027 for example when doing something like
1029 (setq process (start-process ...))
1031 (set-process-filter process ...) */
1035 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1037 FD_CLR (p
->infd
, &input_wait_mask
);
1038 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1040 else if (EQ (p
->filter
, Qt
)
1041 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
1043 FD_SET (p
->infd
, &input_wait_mask
);
1044 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1050 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1051 setup_process_coding_systems (process
);
1055 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1057 doc
: /* Returns the filter function of PROCESS; nil if none.
1058 See `set-process-filter' for more info on filter functions. */)
1060 register Lisp_Object process
;
1062 CHECK_PROCESS (process
);
1063 return XPROCESS (process
)->filter
;
1066 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1068 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1069 The sentinel is called as a function when the process changes state.
1070 It gets two arguments: the process, and a string describing the change. */)
1072 register Lisp_Object process
, sentinel
;
1074 struct Lisp_Process
*p
;
1076 CHECK_PROCESS (process
);
1077 p
= XPROCESS (process
);
1079 p
->sentinel
= sentinel
;
1081 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1085 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1087 doc
: /* Return the sentinel of PROCESS; nil if none.
1088 See `set-process-sentinel' for more info on sentinels. */)
1090 register Lisp_Object process
;
1092 CHECK_PROCESS (process
);
1093 return XPROCESS (process
)->sentinel
;
1096 DEFUN ("set-process-window-size", Fset_process_window_size
,
1097 Sset_process_window_size
, 3, 3, 0,
1098 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1099 (process
, height
, width
)
1100 register Lisp_Object process
, height
, width
;
1102 CHECK_PROCESS (process
);
1103 CHECK_NATNUM (height
);
1104 CHECK_NATNUM (width
);
1106 if (XPROCESS (process
)->infd
< 0
1107 || set_window_size (XPROCESS (process
)->infd
,
1108 XINT (height
), XINT (width
)) <= 0)
1114 DEFUN ("set-process-inherit-coding-system-flag",
1115 Fset_process_inherit_coding_system_flag
,
1116 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1117 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1118 If the second argument FLAG is non-nil, then the variable
1119 `buffer-file-coding-system' of the buffer associated with PROCESS
1120 will be bound to the value of the coding system used to decode
1123 This is useful when the coding system specified for the process buffer
1124 leaves either the character code conversion or the end-of-line conversion
1125 unspecified, or if the coding system used to decode the process output
1126 is more appropriate for saving the process buffer.
1128 Binding the variable `inherit-process-coding-system' to non-nil before
1129 starting the process is an alternative way of setting the inherit flag
1130 for the process which will run. */)
1132 register Lisp_Object process
, flag
;
1134 CHECK_PROCESS (process
);
1135 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1139 DEFUN ("process-inherit-coding-system-flag",
1140 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1142 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1143 If this flag is t, `buffer-file-coding-system' of the buffer
1144 associated with PROCESS will inherit the coding system used to decode
1145 the process output. */)
1147 register Lisp_Object process
;
1149 CHECK_PROCESS (process
);
1150 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
1153 DEFUN ("set-process-query-on-exit-flag",
1154 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1156 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1157 If the second argument FLAG is non-nil, Emacs will query the user before
1158 exiting if PROCESS is running. */)
1160 register Lisp_Object process
, flag
;
1162 CHECK_PROCESS (process
);
1163 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1167 DEFUN ("process-query-on-exit-flag",
1168 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1170 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1172 register Lisp_Object process
;
1174 CHECK_PROCESS (process
);
1175 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1178 #ifdef DATAGRAM_SOCKETS
1179 Lisp_Object
Fprocess_datagram_address ();
1182 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1184 doc
: /* Return the contact info of PROCESS; t for a real child.
1185 For a net connection, the value depends on the optional KEY arg.
1186 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1187 if KEY is t, the complete contact information for the connection is
1188 returned, else the specific value for the keyword KEY is returned.
1189 See `make-network-process' for a list of keywords. */)
1191 register Lisp_Object process
, key
;
1193 Lisp_Object contact
;
1195 CHECK_PROCESS (process
);
1196 contact
= XPROCESS (process
)->childp
;
1198 #ifdef DATAGRAM_SOCKETS
1199 if (DATAGRAM_CONN_P (process
)
1200 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1201 contact
= Fplist_put (contact
, QCremote
,
1202 Fprocess_datagram_address (process
));
1205 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1208 return Fcons (Fplist_get (contact
, QChost
),
1209 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1210 return Fplist_get (contact
, key
);
1213 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1215 doc
: /* Return the plist of PROCESS. */)
1217 register Lisp_Object process
;
1219 CHECK_PROCESS (process
);
1220 return XPROCESS (process
)->plist
;
1223 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1225 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1227 register Lisp_Object process
, plist
;
1229 CHECK_PROCESS (process
);
1232 XPROCESS (process
)->plist
= plist
;
1236 #if 0 /* Turned off because we don't currently record this info
1237 in the process. Perhaps add it. */
1238 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1239 doc
: /* Return the connection type of PROCESS.
1240 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1241 a socket connection. */)
1243 Lisp_Object process
;
1245 return XPROCESS (process
)->type
;
1250 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1252 doc
: /* Convert network ADDRESS from internal format to a string.
1253 A 4 or 5 element vector represents an IPv4 address (with port number).
1254 An 8 or 9 element vector represents an IPv6 address (with port number).
1255 If optional second argument OMIT-PORT is non-nil, don't include a port
1256 number in the string, even when present in ADDRESS.
1257 Returns nil if format of ADDRESS is invalid. */)
1258 (address
, omit_port
)
1259 Lisp_Object address
, omit_port
;
1264 if (STRINGP (address
)) /* AF_LOCAL */
1267 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1269 register struct Lisp_Vector
*p
= XVECTOR (address
);
1270 Lisp_Object args
[10];
1273 if (p
->size
== 4 || (p
->size
== 5 && !NILP (omit_port
)))
1275 args
[0] = build_string ("%d.%d.%d.%d");
1278 else if (p
->size
== 5)
1280 args
[0] = build_string ("%d.%d.%d.%d:%d");
1283 else if (p
->size
== 8 || (p
->size
== 9 && !NILP (omit_port
)))
1285 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1288 else if (p
->size
== 9)
1290 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1296 for (i
= 0; i
< nargs
; i
++)
1298 EMACS_INT element
= XINT (p
->contents
[i
]);
1300 if (element
< 0 || element
> 65535)
1303 if (nargs
<= 5 /* IPv4 */
1304 && i
< 4 /* host, not port */
1308 args
[i
+1] = p
->contents
[i
];
1311 return Fformat (nargs
+1, args
);
1314 if (CONSP (address
))
1316 Lisp_Object args
[2];
1317 args
[0] = build_string ("<Family %d>");
1318 args
[1] = Fcar (address
);
1319 return Fformat (2, args
);
1327 list_processes_1 (query_only
)
1328 Lisp_Object query_only
;
1330 register Lisp_Object tail
, tem
;
1331 Lisp_Object proc
, minspace
, tem1
;
1332 register struct Lisp_Process
*p
;
1334 int w_proc
, w_buffer
, w_tty
;
1336 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1338 w_proc
= 4; /* Proc */
1339 w_buffer
= 6; /* Buffer */
1340 w_tty
= 0; /* Omit if no ttys */
1342 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1346 proc
= Fcdr (Fcar (tail
));
1347 p
= XPROCESS (proc
);
1348 if (NILP (p
->childp
))
1350 if (!NILP (query_only
) && p
->kill_without_query
)
1352 if (STRINGP (p
->name
)
1353 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1355 if (!NILP (p
->buffer
))
1357 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1358 w_buffer
= 8; /* (Killed) */
1359 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1362 if (STRINGP (p
->tty_name
)
1363 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1367 XSETFASTINT (i_status
, w_proc
+ 1);
1368 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1371 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1372 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1375 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1378 XSETFASTINT (minspace
, 1);
1380 set_buffer_internal (XBUFFER (Vstandard_output
));
1381 current_buffer
->undo_list
= Qt
;
1383 current_buffer
->truncate_lines
= Qt
;
1385 write_string ("Proc", -1);
1386 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1387 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1390 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1392 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1393 write_string ("\n", -1);
1395 write_string ("----", -1);
1396 Findent_to (i_status
, minspace
); write_string ("------", -1);
1397 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1400 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1402 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1403 write_string ("\n", -1);
1405 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1409 proc
= Fcdr (Fcar (tail
));
1410 p
= XPROCESS (proc
);
1411 if (NILP (p
->childp
))
1413 if (!NILP (query_only
) && p
->kill_without_query
)
1416 Finsert (1, &p
->name
);
1417 Findent_to (i_status
, minspace
);
1419 if (p
->raw_status_new
)
1422 if (CONSP (p
->status
))
1423 symbol
= XCAR (p
->status
);
1425 if (EQ (symbol
, Qsignal
))
1428 tem
= Fcar (Fcdr (p
->status
));
1430 if (XINT (tem
) < NSIG
)
1431 write_string (sys_errlist
[XINT (tem
)], -1);
1434 Fprinc (symbol
, Qnil
);
1436 else if (NETCONN1_P (p
))
1438 if (EQ (symbol
, Qexit
))
1439 write_string ("closed", -1);
1440 else if (EQ (p
->command
, Qt
))
1441 write_string ("stopped", -1);
1442 else if (EQ (symbol
, Qrun
))
1443 write_string ("open", -1);
1445 Fprinc (symbol
, Qnil
);
1448 Fprinc (symbol
, Qnil
);
1450 if (EQ (symbol
, Qexit
))
1453 tem
= Fcar (Fcdr (p
->status
));
1456 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1457 write_string (tembuf
, -1);
1461 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
) || EQ (symbol
, Qclosed
))
1464 Findent_to (i_buffer
, minspace
);
1465 if (NILP (p
->buffer
))
1466 insert_string ("(none)");
1467 else if (NILP (XBUFFER (p
->buffer
)->name
))
1468 insert_string ("(Killed)");
1470 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1474 Findent_to (i_tty
, minspace
);
1475 if (STRINGP (p
->tty_name
))
1476 Finsert (1, &p
->tty_name
);
1479 Findent_to (i_command
, minspace
);
1481 if (EQ (p
->status
, Qlisten
))
1483 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1484 if (INTEGERP (port
))
1485 port
= Fnumber_to_string (port
);
1487 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1488 sprintf (tembuf
, "(network %s server on %s)\n",
1489 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1490 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1491 insert_string (tembuf
);
1493 else if (NETCONN1_P (p
))
1495 /* For a local socket, there is no host name,
1496 so display service instead. */
1497 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1498 if (!STRINGP (host
))
1500 host
= Fplist_get (p
->childp
, QCservice
);
1501 if (INTEGERP (host
))
1502 host
= Fnumber_to_string (host
);
1505 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1506 sprintf (tembuf
, "(network %s connection to %s)\n",
1507 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1508 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1509 insert_string (tembuf
);
1521 insert_string (" ");
1523 insert_string ("\n");
1527 status_notify (NULL
);
1531 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1532 doc
: /* Display a list of all processes.
1533 If optional argument QUERY-ONLY is non-nil, only processes with
1534 the query-on-exit flag set will be listed.
1535 Any process listed as exited or signaled is actually eliminated
1536 after the listing is made. */)
1538 Lisp_Object query_only
;
1540 internal_with_output_to_temp_buffer ("*Process List*",
1541 list_processes_1
, query_only
);
1545 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1546 doc
: /* Return a list of all processes. */)
1549 return Fmapcar (Qcdr
, Vprocess_alist
);
1552 /* Starting asynchronous inferior processes. */
1554 static Lisp_Object
start_process_unwind ();
1556 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1557 doc
: /* Start a program in a subprocess. Return the process object for it.
1558 NAME is name for process. It is modified if necessary to make it unique.
1559 BUFFER is the buffer (or buffer name) to associate with the process.
1561 Process output (both standard output and standard error streams) goes
1562 at end of BUFFER, unless you specify an output stream or filter
1563 function to handle the output. BUFFER may also be nil, meaning that
1564 this process is not associated with any buffer.
1566 PROGRAM is the program file name. It is searched for in PATH.
1567 Remaining arguments are strings to give program as arguments.
1569 If you want to separate standard output from standard error, invoke
1570 the command through a shell and redirect one of them using the shell
1573 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1576 register Lisp_Object
*args
;
1578 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1580 register unsigned char *new_argv
;
1583 register unsigned char **new_argv
;
1586 int count
= SPECPDL_INDEX ();
1590 buffer
= Fget_buffer_create (buffer
);
1592 /* Make sure that the child will be able to chdir to the current
1593 buffer's current directory, or its unhandled equivalent. We
1594 can't just have the child check for an error when it does the
1595 chdir, since it's in a vfork.
1597 We have to GCPRO around this because Fexpand_file_name and
1598 Funhandled_file_name_directory might call a file name handling
1599 function. The argument list is protected by the caller, so all
1600 we really have to worry about is buffer. */
1602 struct gcpro gcpro1
, gcpro2
;
1604 current_dir
= current_buffer
->directory
;
1606 GCPRO2 (buffer
, current_dir
);
1609 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1611 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1612 report_file_error ("Setting current directory",
1613 Fcons (current_buffer
->directory
, Qnil
));
1619 CHECK_STRING (name
);
1623 CHECK_STRING (program
);
1625 proc
= make_process (name
);
1626 /* If an error occurs and we can't start the process, we want to
1627 remove it from the process list. This means that each error
1628 check in create_process doesn't need to call remove_process
1629 itself; it's all taken care of here. */
1630 record_unwind_protect (start_process_unwind
, proc
);
1632 XPROCESS (proc
)->childp
= Qt
;
1633 XPROCESS (proc
)->plist
= Qnil
;
1634 XPROCESS (proc
)->buffer
= buffer
;
1635 XPROCESS (proc
)->sentinel
= Qnil
;
1636 XPROCESS (proc
)->filter
= Qnil
;
1637 XPROCESS (proc
)->filter_multibyte
1638 = !NILP (buffer_defaults
.enable_multibyte_characters
);
1639 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1641 #ifdef ADAPTIVE_READ_BUFFERING
1642 XPROCESS (proc
)->adaptive_read_buffering
1643 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1644 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1647 /* Make the process marker point into the process buffer (if any). */
1648 if (BUFFERP (buffer
))
1649 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1650 BUF_ZV (XBUFFER (buffer
)),
1651 BUF_ZV_BYTE (XBUFFER (buffer
)));
1654 /* Decide coding systems for communicating with the process. Here
1655 we don't setup the structure coding_system nor pay attention to
1656 unibyte mode. They are done in create_process. */
1658 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1659 Lisp_Object coding_systems
= Qt
;
1660 Lisp_Object val
, *args2
;
1661 struct gcpro gcpro1
, gcpro2
;
1663 val
= Vcoding_system_for_read
;
1666 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1667 args2
[0] = Qstart_process
;
1668 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1669 GCPRO2 (proc
, current_dir
);
1670 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1672 if (CONSP (coding_systems
))
1673 val
= XCAR (coding_systems
);
1674 else if (CONSP (Vdefault_process_coding_system
))
1675 val
= XCAR (Vdefault_process_coding_system
);
1677 XPROCESS (proc
)->decode_coding_system
= val
;
1679 val
= Vcoding_system_for_write
;
1682 if (EQ (coding_systems
, Qt
))
1684 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1685 args2
[0] = Qstart_process
;
1686 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1687 GCPRO2 (proc
, current_dir
);
1688 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1691 if (CONSP (coding_systems
))
1692 val
= XCDR (coding_systems
);
1693 else if (CONSP (Vdefault_process_coding_system
))
1694 val
= XCDR (Vdefault_process_coding_system
);
1696 XPROCESS (proc
)->encode_coding_system
= val
;
1700 /* Make a one member argv with all args concatenated
1701 together separated by a blank. */
1702 len
= SBYTES (program
) + 2;
1703 for (i
= 3; i
< nargs
; i
++)
1707 len
+= SBYTES (tem
) + 1; /* count the blank */
1709 new_argv
= (unsigned char *) alloca (len
);
1710 strcpy (new_argv
, SDATA (program
));
1711 for (i
= 3; i
< nargs
; i
++)
1715 strcat (new_argv
, " ");
1716 strcat (new_argv
, SDATA (tem
));
1718 /* Need to add code here to check for program existence on VMS */
1721 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1723 /* If program file name is not absolute, search our path for it.
1724 Put the name we will really use in TEM. */
1725 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1726 && !(SCHARS (program
) > 1
1727 && IS_DEVICE_SEP (SREF (program
, 1))))
1729 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1732 GCPRO4 (name
, program
, buffer
, current_dir
);
1733 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1736 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1737 tem
= Fexpand_file_name (tem
, Qnil
);
1741 if (!NILP (Ffile_directory_p (program
)))
1742 error ("Specified program for new process is a directory");
1746 /* If program file name starts with /: for quoting a magic name,
1748 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1749 && SREF (tem
, 1) == ':')
1750 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1752 /* Encode the file name and put it in NEW_ARGV.
1753 That's where the child will use it to execute the program. */
1754 tem
= ENCODE_FILE (tem
);
1755 new_argv
[0] = SDATA (tem
);
1757 /* Here we encode arguments by the coding system used for sending
1758 data to the process. We don't support using different coding
1759 systems for encoding arguments and for encoding data sent to the
1762 for (i
= 3; i
< nargs
; i
++)
1766 if (STRING_MULTIBYTE (tem
))
1767 tem
= (code_convert_string_norecord
1768 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1769 new_argv
[i
- 2] = SDATA (tem
);
1771 new_argv
[i
- 2] = 0;
1772 #endif /* not VMS */
1774 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1775 XPROCESS (proc
)->decoding_carryover
= 0;
1776 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1778 XPROCESS (proc
)->inherit_coding_system_flag
1779 = !(NILP (buffer
) || !inherit_process_coding_system
);
1781 create_process (proc
, (char **) new_argv
, current_dir
);
1783 return unbind_to (count
, proc
);
1786 /* This function is the unwind_protect form for Fstart_process. If
1787 PROC doesn't have its pid set, then we know someone has signaled
1788 an error and the process wasn't started successfully, so we should
1789 remove it from the process list. */
1791 start_process_unwind (proc
)
1794 if (!PROCESSP (proc
))
1797 /* Was PROC started successfully? */
1798 if (XPROCESS (proc
)->pid
<= 0)
1799 remove_process (proc
);
1805 create_process_1 (timer
)
1806 struct atimer
*timer
;
1808 /* Nothing to do. */
1812 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1815 /* Mimic blocking of signals on system V, which doesn't really have it. */
1817 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1818 int sigchld_deferred
;
1821 create_process_sigchld ()
1823 signal (SIGCHLD
, create_process_sigchld
);
1825 sigchld_deferred
= 1;
1831 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1833 create_process (process
, new_argv
, current_dir
)
1834 Lisp_Object process
;
1836 Lisp_Object current_dir
;
1838 int inchannel
, outchannel
;
1841 #ifdef POSIX_SIGNALS
1844 struct sigaction sigint_action
;
1845 struct sigaction sigquit_action
;
1847 struct sigaction sighup_action
;
1849 #else /* !POSIX_SIGNALS */
1852 SIGTYPE (*sigchld
)();
1855 #endif /* !POSIX_SIGNALS */
1856 /* Use volatile to protect variables from being clobbered by longjmp. */
1857 volatile int forkin
, forkout
;
1858 volatile int pty_flag
= 0;
1860 extern char **environ
;
1863 inchannel
= outchannel
= -1;
1866 if (!NILP (Vprocess_connection_type
))
1867 outchannel
= inchannel
= allocate_pty ();
1871 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1872 /* On most USG systems it does not work to open the pty's tty here,
1873 then close it and reopen it in the child. */
1875 /* Don't let this terminal become our controlling terminal
1876 (in case we don't have one). */
1877 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1879 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1882 report_file_error ("Opening pty", Qnil
);
1883 #if defined (RTU) || defined (UNIPLUS) || defined (DONT_REOPEN_PTY)
1884 /* In the case that vfork is defined as fork, the parent process
1885 (Emacs) may send some data before the child process completes
1886 tty options setup. So we setup tty before forking. */
1887 child_setup_tty (forkout
);
1888 #endif /* RTU or UNIPLUS or DONT_REOPEN_PTY */
1890 forkin
= forkout
= -1;
1891 #endif /* not USG, or USG_SUBTTY_WORKS */
1895 #endif /* HAVE_PTYS */
1898 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1899 report_file_error ("Opening socketpair", Qnil
);
1900 outchannel
= inchannel
= sv
[0];
1901 forkout
= forkin
= sv
[1];
1903 #else /* not SKTPAIR */
1908 report_file_error ("Creating pipe", Qnil
);
1914 emacs_close (inchannel
);
1915 emacs_close (forkout
);
1916 report_file_error ("Creating pipe", Qnil
);
1921 #endif /* not SKTPAIR */
1924 /* Replaced by close_process_descs */
1925 set_exclusive_use (inchannel
);
1926 set_exclusive_use (outchannel
);
1929 /* Stride people say it's a mystery why this is needed
1930 as well as the O_NDELAY, but that it fails without this. */
1931 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1934 ioctl (inchannel
, FIONBIO
, &one
);
1939 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1940 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1943 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1944 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1948 /* Record this as an active process, with its channels.
1949 As a result, child_setup will close Emacs's side of the pipes. */
1950 chan_process
[inchannel
] = process
;
1951 XPROCESS (process
)->infd
= inchannel
;
1952 XPROCESS (process
)->outfd
= outchannel
;
1954 /* Previously we recorded the tty descriptor used in the subprocess.
1955 It was only used for getting the foreground tty process, so now
1956 we just reopen the device (see emacs_get_tty_pgrp) as this is
1957 more portable (see USG_SUBTTY_WORKS above). */
1959 XPROCESS (process
)->pty_flag
= pty_flag
;
1960 XPROCESS (process
)->status
= Qrun
;
1961 setup_process_coding_systems (process
);
1963 /* Delay interrupts until we have a chance to store
1964 the new fork's pid in its process structure */
1965 #ifdef POSIX_SIGNALS
1966 sigemptyset (&blocked
);
1968 sigaddset (&blocked
, SIGCHLD
);
1970 #ifdef HAVE_WORKING_VFORK
1971 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1972 this sets the parent's signal handlers as well as the child's.
1973 So delay all interrupts whose handlers the child might munge,
1974 and record the current handlers so they can be restored later. */
1975 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1976 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1978 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1980 #endif /* HAVE_WORKING_VFORK */
1981 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1982 #else /* !POSIX_SIGNALS */
1986 #else /* not BSD4_1 */
1987 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1988 sigsetmask (sigmask (SIGCHLD
));
1989 #else /* ordinary USG */
1991 sigchld_deferred
= 0;
1992 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1994 #endif /* ordinary USG */
1995 #endif /* not BSD4_1 */
1996 #endif /* SIGCHLD */
1997 #endif /* !POSIX_SIGNALS */
1999 FD_SET (inchannel
, &input_wait_mask
);
2000 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2001 if (inchannel
> max_process_desc
)
2002 max_process_desc
= inchannel
;
2004 /* Until we store the proper pid, enable sigchld_handler
2005 to recognize an unknown pid as standing for this process.
2006 It is very important not to let this `marker' value stay
2007 in the table after this function has returned; if it does
2008 it might cause call-process to hang and subsequent asynchronous
2009 processes to get their return values scrambled. */
2010 XPROCESS (process
)->pid
= -1;
2015 /* child_setup must clobber environ on systems with true vfork.
2016 Protect it from permanent change. */
2017 char **save_environ
= environ
;
2019 current_dir
= ENCODE_FILE (current_dir
);
2024 #endif /* not WINDOWSNT */
2026 int xforkin
= forkin
;
2027 int xforkout
= forkout
;
2029 #if 0 /* This was probably a mistake--it duplicates code later on,
2030 but fails to handle all the cases. */
2031 /* Make sure SIGCHLD is not blocked in the child. */
2032 sigsetmask (SIGEMPTYMASK
);
2035 /* Make the pty be the controlling terminal of the process. */
2037 /* First, disconnect its current controlling terminal. */
2039 /* We tried doing setsid only if pty_flag, but it caused
2040 process_set_signal to fail on SGI when using a pipe. */
2042 /* Make the pty's terminal the controlling terminal. */
2046 /* We ignore the return value
2047 because faith@cs.unc.edu says that is necessary on Linux. */
2048 ioctl (xforkin
, TIOCSCTTY
, 0);
2051 #else /* not HAVE_SETSID */
2053 /* It's very important to call setpgrp here and no time
2054 afterwards. Otherwise, we lose our controlling tty which
2055 is set when we open the pty. */
2058 #endif /* not HAVE_SETSID */
2059 #if defined (HAVE_TERMIOS) && defined (LDISC1)
2060 if (pty_flag
&& xforkin
>= 0)
2063 tcgetattr (xforkin
, &t
);
2065 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
2066 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
2069 #if defined (NTTYDISC) && defined (TIOCSETD)
2070 if (pty_flag
&& xforkin
>= 0)
2072 /* Use new line discipline. */
2073 int ldisc
= NTTYDISC
;
2074 ioctl (xforkin
, TIOCSETD
, &ldisc
);
2079 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
2080 can do TIOCSPGRP only to the process's controlling tty. */
2083 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
2084 I can't test it since I don't have 4.3. */
2085 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
2086 ioctl (j
, TIOCNOTTY
, 0);
2089 /* In order to get a controlling terminal on some versions
2090 of BSD, it is necessary to put the process in pgrp 0
2091 before it opens the terminal. */
2099 #endif /* TIOCNOTTY */
2101 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2102 /*** There is a suggestion that this ought to be a
2103 conditional on TIOCSPGRP,
2104 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2105 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2106 that system does seem to need this code, even though
2107 both HAVE_SETSID and TIOCSCTTY are defined. */
2108 /* Now close the pty (if we had it open) and reopen it.
2109 This makes the pty the controlling terminal of the subprocess. */
2112 #ifdef SET_CHILD_PTY_PGRP
2113 int pgrp
= getpid ();
2116 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2119 emacs_close (xforkin
);
2120 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2124 emacs_write (1, "Couldn't open the pty terminal ", 31);
2125 emacs_write (1, pty_name
, strlen (pty_name
));
2126 emacs_write (1, "\n", 1);
2130 #ifdef SET_CHILD_PTY_PGRP
2131 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2132 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2135 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2137 #ifdef SETUP_SLAVE_PTY
2142 #endif /* SETUP_SLAVE_PTY */
2144 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2145 Now reenable it in the child, so it will die when we want it to. */
2147 signal (SIGHUP
, SIG_DFL
);
2149 #endif /* HAVE_PTYS */
2151 signal (SIGINT
, SIG_DFL
);
2152 signal (SIGQUIT
, SIG_DFL
);
2154 /* Stop blocking signals in the child. */
2155 #ifdef POSIX_SIGNALS
2156 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2157 #else /* !POSIX_SIGNALS */
2161 #else /* not BSD4_1 */
2162 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2163 sigsetmask (SIGEMPTYMASK
);
2164 #else /* ordinary USG */
2166 signal (SIGCHLD
, sigchld
);
2168 #endif /* ordinary USG */
2169 #endif /* not BSD4_1 */
2170 #endif /* SIGCHLD */
2171 #endif /* !POSIX_SIGNALS */
2173 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2175 child_setup_tty (xforkout
);
2176 #endif /* not RTU and not UNIPLUS and not DONT_REOPEN_PTY */
2178 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2179 new_argv
, 1, current_dir
);
2180 #else /* not WINDOWSNT */
2181 child_setup (xforkin
, xforkout
, xforkout
,
2182 new_argv
, 1, current_dir
);
2183 #endif /* not WINDOWSNT */
2185 environ
= save_environ
;
2190 /* This runs in the Emacs process. */
2194 emacs_close (forkin
);
2195 if (forkin
!= forkout
&& forkout
>= 0)
2196 emacs_close (forkout
);
2200 /* vfork succeeded. */
2201 XPROCESS (process
)->pid
= pid
;
2204 register_child (pid
, inchannel
);
2205 #endif /* WINDOWSNT */
2207 /* If the subfork execv fails, and it exits,
2208 this close hangs. I don't know why.
2209 So have an interrupt jar it loose. */
2211 struct atimer
*timer
;
2215 EMACS_SET_SECS_USECS (offset
, 1, 0);
2216 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2219 emacs_close (forkin
);
2221 cancel_atimer (timer
);
2225 if (forkin
!= forkout
&& forkout
>= 0)
2226 emacs_close (forkout
);
2230 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2233 XPROCESS (process
)->tty_name
= Qnil
;
2236 /* Restore the signal state whether vfork succeeded or not.
2237 (We will signal an error, below, if it failed.) */
2238 #ifdef POSIX_SIGNALS
2239 #ifdef HAVE_WORKING_VFORK
2240 /* Restore the parent's signal handlers. */
2241 sigaction (SIGINT
, &sigint_action
, 0);
2242 sigaction (SIGQUIT
, &sigquit_action
, 0);
2244 sigaction (SIGHUP
, &sighup_action
, 0);
2246 #endif /* HAVE_WORKING_VFORK */
2247 /* Stop blocking signals in the parent. */
2248 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2249 #else /* !POSIX_SIGNALS */
2253 #else /* not BSD4_1 */
2254 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2255 sigsetmask (SIGEMPTYMASK
);
2256 #else /* ordinary USG */
2258 signal (SIGCHLD
, sigchld
);
2259 /* Now really handle any of these signals
2260 that came in during this function. */
2261 if (sigchld_deferred
)
2262 kill (getpid (), SIGCHLD
);
2264 #endif /* ordinary USG */
2265 #endif /* not BSD4_1 */
2266 #endif /* SIGCHLD */
2267 #endif /* !POSIX_SIGNALS */
2269 /* Now generate the error if vfork failed. */
2271 report_file_error ("Doing vfork", Qnil
);
2273 #endif /* not VMS */
2278 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2279 The address family of sa is not included in the result. */
2282 conv_sockaddr_to_lisp (sa
, len
)
2283 struct sockaddr
*sa
;
2286 Lisp_Object address
;
2289 register struct Lisp_Vector
*p
;
2291 switch (sa
->sa_family
)
2295 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2296 len
= sizeof (sin
->sin_addr
) + 1;
2297 address
= Fmake_vector (make_number (len
), Qnil
);
2298 p
= XVECTOR (address
);
2299 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2300 cp
= (unsigned char *)&sin
->sin_addr
;
2306 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2307 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2308 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2309 address
= Fmake_vector (make_number (len
), Qnil
);
2310 p
= XVECTOR (address
);
2311 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2312 for (i
= 0; i
< len
; i
++)
2313 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2317 #ifdef HAVE_LOCAL_SOCKETS
2320 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2321 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2322 if (sockun
->sun_path
[i
] == 0)
2324 return make_unibyte_string (sockun
->sun_path
, i
);
2328 len
-= sizeof (sa
->sa_family
);
2329 address
= Fcons (make_number (sa
->sa_family
),
2330 Fmake_vector (make_number (len
), Qnil
));
2331 p
= XVECTOR (XCDR (address
));
2332 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2338 p
->contents
[i
++] = make_number (*cp
++);
2344 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2347 get_lisp_to_sockaddr_size (address
, familyp
)
2348 Lisp_Object address
;
2351 register struct Lisp_Vector
*p
;
2353 if (VECTORP (address
))
2355 p
= XVECTOR (address
);
2359 return sizeof (struct sockaddr_in
);
2362 else if (p
->size
== 9)
2364 *familyp
= AF_INET6
;
2365 return sizeof (struct sockaddr_in6
);
2369 #ifdef HAVE_LOCAL_SOCKETS
2370 else if (STRINGP (address
))
2372 *familyp
= AF_LOCAL
;
2373 return sizeof (struct sockaddr_un
);
2376 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2378 struct sockaddr
*sa
;
2379 *familyp
= XINT (XCAR (address
));
2380 p
= XVECTOR (XCDR (address
));
2381 return p
->size
+ sizeof (sa
->sa_family
);
2386 /* Convert an address object (vector or string) to an internal sockaddr.
2388 The address format has been basically validated by
2389 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2390 it could have come from user data. So if FAMILY is not valid,
2391 we return after zeroing *SA. */
2394 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2396 Lisp_Object address
;
2397 struct sockaddr
*sa
;
2400 register struct Lisp_Vector
*p
;
2401 register unsigned char *cp
= NULL
;
2406 if (VECTORP (address
))
2408 p
= XVECTOR (address
);
2409 if (family
== AF_INET
)
2411 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2412 len
= sizeof (sin
->sin_addr
) + 1;
2413 i
= XINT (p
->contents
[--len
]);
2414 sin
->sin_port
= htons (i
);
2415 cp
= (unsigned char *)&sin
->sin_addr
;
2416 sa
->sa_family
= family
;
2419 else if (family
== AF_INET6
)
2421 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2422 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2423 len
= sizeof (sin6
->sin6_addr
) + 1;
2424 i
= XINT (p
->contents
[--len
]);
2425 sin6
->sin6_port
= htons (i
);
2426 for (i
= 0; i
< len
; i
++)
2427 if (INTEGERP (p
->contents
[i
]))
2429 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2432 sa
->sa_family
= family
;
2437 else if (STRINGP (address
))
2439 #ifdef HAVE_LOCAL_SOCKETS
2440 if (family
== AF_LOCAL
)
2442 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2443 cp
= SDATA (address
);
2444 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2445 sockun
->sun_path
[i
] = *cp
++;
2446 sa
->sa_family
= family
;
2453 p
= XVECTOR (XCDR (address
));
2454 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2457 for (i
= 0; i
< len
; i
++)
2458 if (INTEGERP (p
->contents
[i
]))
2459 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2462 #ifdef DATAGRAM_SOCKETS
2463 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2465 doc
: /* Get the current datagram address associated with PROCESS. */)
2467 Lisp_Object process
;
2471 CHECK_PROCESS (process
);
2473 if (!DATAGRAM_CONN_P (process
))
2476 channel
= XPROCESS (process
)->infd
;
2477 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2478 datagram_address
[channel
].len
);
2481 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2483 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2484 Returns nil upon error setting address, ADDRESS otherwise. */)
2486 Lisp_Object process
, address
;
2491 CHECK_PROCESS (process
);
2493 if (!DATAGRAM_CONN_P (process
))
2496 channel
= XPROCESS (process
)->infd
;
2498 len
= get_lisp_to_sockaddr_size (address
, &family
);
2499 if (datagram_address
[channel
].len
!= len
)
2501 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2507 static struct socket_options
{
2508 /* The name of this option. Should be lowercase version of option
2509 name without SO_ prefix. */
2511 /* Option level SOL_... */
2513 /* Option number SO_... */
2515 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2516 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2517 } socket_options
[] =
2519 #ifdef SO_BINDTODEVICE
2520 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2523 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2526 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2529 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2532 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2535 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2538 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2541 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2543 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2546 /* Set option OPT to value VAL on socket S.
2548 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2549 Signals an error if setting a known option fails.
2553 set_socket_option (s
, opt
, val
)
2555 Lisp_Object opt
, val
;
2558 struct socket_options
*sopt
;
2563 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2564 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2565 if (strcmp (name
, sopt
->name
) == 0)
2568 switch (sopt
->opttype
)
2573 optval
= NILP (val
) ? 0 : 1;
2574 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2575 &optval
, sizeof (optval
));
2583 optval
= XINT (val
);
2585 error ("Bad option value for %s", name
);
2586 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2587 &optval
, sizeof (optval
));
2591 #ifdef SO_BINDTODEVICE
2594 char devname
[IFNAMSIZ
+1];
2596 /* This is broken, at least in the Linux 2.4 kernel.
2597 To unbind, the arg must be a zero integer, not the empty string.
2598 This should work on all systems. KFS. 2003-09-23. */
2599 bzero (devname
, sizeof devname
);
2602 char *arg
= (char *) SDATA (val
);
2603 int len
= min (strlen (arg
), IFNAMSIZ
);
2604 bcopy (arg
, devname
, len
);
2606 else if (!NILP (val
))
2607 error ("Bad option value for %s", name
);
2608 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2617 struct linger linger
;
2620 linger
.l_linger
= 0;
2622 linger
.l_linger
= XINT (val
);
2624 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2625 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2626 &linger
, sizeof (linger
));
2636 report_file_error ("Cannot set network option",
2637 Fcons (opt
, Fcons (val
, Qnil
)));
2638 return (1 << sopt
->optbit
);
2642 DEFUN ("set-network-process-option",
2643 Fset_network_process_option
, Sset_network_process_option
,
2645 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2646 See `make-network-process' for a list of options and values.
2647 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2648 OPTION is not a supported option, return nil instead; otherwise return t. */)
2649 (process
, option
, value
, no_error
)
2650 Lisp_Object process
, option
, value
;
2651 Lisp_Object no_error
;
2654 struct Lisp_Process
*p
;
2656 CHECK_PROCESS (process
);
2657 p
= XPROCESS (process
);
2658 if (!NETCONN1_P (p
))
2659 error ("Process is not a network process");
2663 error ("Process is not running");
2665 if (set_socket_option (s
, option
, value
))
2667 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2671 if (NILP (no_error
))
2672 error ("Unknown or unsupported option");
2678 /* A version of request_sigio suitable for a record_unwind_protect. */
2681 unwind_request_sigio (dummy
)
2684 if (interrupt_input
)
2689 /* Create a network stream/datagram client/server process. Treated
2690 exactly like a normal process when reading and writing. Primary
2691 differences are in status display and process deletion. A network
2692 connection has no PID; you cannot signal it. All you can do is
2693 stop/continue it and deactivate/close it via delete-process */
2695 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2697 doc
: /* Create and return a network server or client process.
2699 In Emacs, network connections are represented by process objects, so
2700 input and output work as for subprocesses and `delete-process' closes
2701 a network connection. However, a network process has no process id,
2702 it cannot be signaled, and the status codes are different from normal
2705 Arguments are specified as keyword/argument pairs. The following
2706 arguments are defined:
2708 :name NAME -- NAME is name for process. It is modified if necessary
2711 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2712 with the process. Process output goes at end of that buffer, unless
2713 you specify an output stream or filter function to handle the output.
2714 BUFFER may be also nil, meaning that this process is not associated
2717 :host HOST -- HOST is name of the host to connect to, or its IP
2718 address. The symbol `local' specifies the local host. If specified
2719 for a server process, it must be a valid name or address for the local
2720 host, and only clients connecting to that address will be accepted.
2722 :service SERVICE -- SERVICE is name of the service desired, or an
2723 integer specifying a port number to connect to. If SERVICE is t,
2724 a random port number is selected for the server. (If Emacs was
2725 compiled with getaddrinfo, a port number can also be specified as a
2726 string, e.g. "80", as well as an integer. This is not portable.)
2728 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2729 stream type connection, `datagram' creates a datagram type connection.
2731 :family FAMILY -- FAMILY is the address (and protocol) family for the
2732 service specified by HOST and SERVICE. The default (nil) is to use
2733 whatever address family (IPv4 or IPv6) that is defined for the host
2734 and port number specified by HOST and SERVICE. Other address families
2736 local -- for a local (i.e. UNIX) address specified by SERVICE.
2737 ipv4 -- use IPv4 address family only.
2738 ipv6 -- use IPv6 address family only.
2740 :local ADDRESS -- ADDRESS is the local address used for the connection.
2741 This parameter is ignored when opening a client process. When specified
2742 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2744 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2745 connection. This parameter is ignored when opening a stream server
2746 process. For a datagram server process, it specifies the initial
2747 setting of the remote datagram address. When specified for a client
2748 process, the FAMILY, HOST, and SERVICE args are ignored.
2750 The format of ADDRESS depends on the address family:
2751 - An IPv4 address is represented as an vector of integers [A B C D P]
2752 corresponding to numeric IP address A.B.C.D and port number P.
2753 - A local address is represented as a string with the address in the
2754 local address space.
2755 - An "unsupported family" address is represented by a cons (F . AV)
2756 where F is the family number and AV is a vector containing the socket
2757 address data with one element per address data byte. Do not rely on
2758 this format in portable code, as it may depend on implementation
2759 defined constants, data sizes, and data structure alignment.
2761 :coding CODING -- If CODING is a symbol, it specifies the coding
2762 system used for both reading and writing for this process. If CODING
2763 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2764 ENCODING is used for writing.
2766 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2767 return without waiting for the connection to complete; instead, the
2768 sentinel function will be called with second arg matching "open" (if
2769 successful) or "failed" when the connect completes. Default is to use
2770 a blocking connect (i.e. wait) for stream type connections.
2772 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2773 running when Emacs is exited.
2775 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2776 In the stopped state, a server process does not accept new
2777 connections, and a client process does not handle incoming traffic.
2778 The stopped state is cleared by `continue-process' and set by
2781 :filter FILTER -- Install FILTER as the process filter.
2783 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2784 process filter are multibyte, otherwise they are unibyte.
2785 If this keyword is not specified, the strings are multibyte if
2786 `default-enable-multibyte-characters' is non-nil.
2788 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2790 :log LOG -- Install LOG as the server process log function. This
2791 function is called when the server accepts a network connection from a
2792 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2793 is the server process, CLIENT is the new process for the connection,
2794 and MESSAGE is a string.
2796 :plist PLIST -- Install PLIST as the new process' initial plist.
2798 :server QLEN -- if QLEN is non-nil, create a server process for the
2799 specified FAMILY, SERVICE, and connection type (stream or datagram).
2800 If QLEN is an integer, it is used as the max. length of the server's
2801 pending connection queue (also known as the backlog); the default
2802 queue length is 5. Default is to create a client process.
2804 The following network options can be specified for this connection:
2806 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2807 :dontroute BOOL -- Only send to directly connected hosts.
2808 :keepalive BOOL -- Send keep-alive messages on network stream.
2809 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2810 :oobinline BOOL -- Place out-of-band data in receive data stream.
2811 :priority INT -- Set protocol defined priority for sent packets.
2812 :reuseaddr BOOL -- Allow reusing a recently used local address
2813 (this is allowed by default for a server process).
2814 :bindtodevice NAME -- bind to interface NAME. Using this may require
2815 special privileges on some systems.
2817 Consult the relevant system programmer's manual pages for more
2818 information on using these options.
2821 A server process will listen for and accept connections from clients.
2822 When a client connection is accepted, a new network process is created
2823 for the connection with the following parameters:
2825 - The client's process name is constructed by concatenating the server
2826 process' NAME and a client identification string.
2827 - If the FILTER argument is non-nil, the client process will not get a
2828 separate process buffer; otherwise, the client's process buffer is a newly
2829 created buffer named after the server process' BUFFER name or process
2830 NAME concatenated with the client identification string.
2831 - The connection type and the process filter and sentinel parameters are
2832 inherited from the server process' TYPE, FILTER and SENTINEL.
2833 - The client process' contact info is set according to the client's
2834 addressing information (typically an IP address and a port number).
2835 - The client process' plist is initialized from the server's plist.
2837 Notice that the FILTER and SENTINEL args are never used directly by
2838 the server process. Also, the BUFFER argument is not used directly by
2839 the server process, but via the optional :log function, accepted (and
2840 failed) connections may be logged in the server process' buffer.
2842 The original argument list, modified with the actual connection
2843 information, is available via the `process-contact' function.
2845 usage: (make-network-process &rest ARGS) */)
2851 Lisp_Object contact
;
2852 struct Lisp_Process
*p
;
2853 #ifdef HAVE_GETADDRINFO
2854 struct addrinfo ai
, *res
, *lres
;
2855 struct addrinfo hints
;
2856 char *portstring
, portbuf
[128];
2857 #else /* HAVE_GETADDRINFO */
2858 struct _emacs_addrinfo
2864 struct sockaddr
*ai_addr
;
2865 struct _emacs_addrinfo
*ai_next
;
2867 #endif /* HAVE_GETADDRINFO */
2868 struct sockaddr_in address_in
;
2869 #ifdef HAVE_LOCAL_SOCKETS
2870 struct sockaddr_un address_un
;
2875 int s
= -1, outch
, inch
;
2876 struct gcpro gcpro1
;
2877 int count
= SPECPDL_INDEX ();
2879 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2881 Lisp_Object name
, buffer
, host
, service
, address
;
2882 Lisp_Object filter
, sentinel
;
2883 int is_non_blocking_client
= 0;
2884 int is_server
= 0, backlog
= 5;
2891 /* Save arguments for process-contact and clone-process. */
2892 contact
= Flist (nargs
, args
);
2896 /* Ensure socket support is loaded if available. */
2897 init_winsock (TRUE
);
2900 /* :type TYPE (nil: stream, datagram */
2901 tem
= Fplist_get (contact
, QCtype
);
2903 socktype
= SOCK_STREAM
;
2904 #ifdef DATAGRAM_SOCKETS
2905 else if (EQ (tem
, Qdatagram
))
2906 socktype
= SOCK_DGRAM
;
2909 error ("Unsupported connection type");
2912 tem
= Fplist_get (contact
, QCserver
);
2915 /* Don't support network sockets when non-blocking mode is
2916 not available, since a blocked Emacs is not useful. */
2917 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2918 error ("Network servers not supported");
2922 backlog
= XINT (tem
);
2926 /* Make QCaddress an alias for :local (server) or :remote (client). */
2927 QCaddress
= is_server
? QClocal
: QCremote
;
2930 if (!is_server
&& socktype
== SOCK_STREAM
2931 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2933 #ifndef NON_BLOCKING_CONNECT
2934 error ("Non-blocking connect not supported");
2936 is_non_blocking_client
= 1;
2940 name
= Fplist_get (contact
, QCname
);
2941 buffer
= Fplist_get (contact
, QCbuffer
);
2942 filter
= Fplist_get (contact
, QCfilter
);
2943 sentinel
= Fplist_get (contact
, QCsentinel
);
2945 CHECK_STRING (name
);
2948 /* Let's handle TERM before things get complicated ... */
2949 host
= Fplist_get (contact
, QChost
);
2950 CHECK_STRING (host
);
2952 service
= Fplist_get (contact
, QCservice
);
2953 if (INTEGERP (service
))
2954 port
= htons ((unsigned short) XINT (service
));
2957 struct servent
*svc_info
;
2958 CHECK_STRING (service
);
2959 svc_info
= getservbyname (SDATA (service
), "tcp");
2961 error ("Unknown service: %s", SDATA (service
));
2962 port
= svc_info
->s_port
;
2965 s
= connect_server (0);
2967 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2968 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2969 send_command (s
, C_DUMB
, 1, 0);
2971 #else /* not TERM */
2973 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2974 ai
.ai_socktype
= socktype
;
2979 /* :local ADDRESS or :remote ADDRESS */
2980 address
= Fplist_get (contact
, QCaddress
);
2981 if (!NILP (address
))
2983 host
= service
= Qnil
;
2985 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2986 error ("Malformed :address");
2987 ai
.ai_family
= family
;
2988 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2989 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2993 /* :family FAMILY -- nil (for Inet), local, or integer. */
2994 tem
= Fplist_get (contact
, QCfamily
);
2997 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3003 #ifdef HAVE_LOCAL_SOCKETS
3004 else if (EQ (tem
, Qlocal
))
3008 else if (EQ (tem
, Qipv6
))
3011 else if (EQ (tem
, Qipv4
))
3013 else if (INTEGERP (tem
))
3014 family
= XINT (tem
);
3016 error ("Unknown address family");
3018 ai
.ai_family
= family
;
3020 /* :service SERVICE -- string, integer (port number), or t (random port). */
3021 service
= Fplist_get (contact
, QCservice
);
3023 #ifdef HAVE_LOCAL_SOCKETS
3024 if (family
== AF_LOCAL
)
3026 /* Host is not used. */
3028 CHECK_STRING (service
);
3029 bzero (&address_un
, sizeof address_un
);
3030 address_un
.sun_family
= AF_LOCAL
;
3031 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
3032 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3033 ai
.ai_addrlen
= sizeof address_un
;
3038 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3039 host
= Fplist_get (contact
, QChost
);
3042 if (EQ (host
, Qlocal
))
3043 host
= build_string ("localhost");
3044 CHECK_STRING (host
);
3047 /* Slow down polling to every ten seconds.
3048 Some kernels have a bug which causes retrying connect to fail
3049 after a connect. Polling can interfere with gethostbyname too. */
3050 #ifdef POLL_FOR_INPUT
3051 if (socktype
== SOCK_STREAM
)
3053 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3054 bind_polling_period (10);
3058 #ifdef HAVE_GETADDRINFO
3059 /* If we have a host, use getaddrinfo to resolve both host and service.
3060 Otherwise, use getservbyname to lookup the service. */
3064 /* SERVICE can either be a string or int.
3065 Convert to a C string for later use by getaddrinfo. */
3066 if (EQ (service
, Qt
))
3068 else if (INTEGERP (service
))
3070 sprintf (portbuf
, "%ld", (long) XINT (service
));
3071 portstring
= portbuf
;
3075 CHECK_STRING (service
);
3076 portstring
= SDATA (service
);
3081 memset (&hints
, 0, sizeof (hints
));
3083 hints
.ai_family
= family
;
3084 hints
.ai_socktype
= socktype
;
3085 hints
.ai_protocol
= 0;
3086 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
3088 #ifdef HAVE_GAI_STRERROR
3089 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
3091 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
3097 #endif /* HAVE_GETADDRINFO */
3099 /* We end up here if getaddrinfo is not defined, or in case no hostname
3100 has been specified (e.g. for a local server process). */
3102 if (EQ (service
, Qt
))
3104 else if (INTEGERP (service
))
3105 port
= htons ((unsigned short) XINT (service
));
3108 struct servent
*svc_info
;
3109 CHECK_STRING (service
);
3110 svc_info
= getservbyname (SDATA (service
),
3111 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3113 error ("Unknown service: %s", SDATA (service
));
3114 port
= svc_info
->s_port
;
3117 bzero (&address_in
, sizeof address_in
);
3118 address_in
.sin_family
= family
;
3119 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3120 address_in
.sin_port
= port
;
3122 #ifndef HAVE_GETADDRINFO
3125 struct hostent
*host_info_ptr
;
3127 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3128 as it may `hang' Emacs for a very long time. */
3131 host_info_ptr
= gethostbyname (SDATA (host
));
3136 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
3137 host_info_ptr
->h_length
);
3138 family
= host_info_ptr
->h_addrtype
;
3139 address_in
.sin_family
= family
;
3142 /* Attempt to interpret host as numeric inet address */
3144 IN_ADDR numeric_addr
;
3145 numeric_addr
= inet_addr ((char *) SDATA (host
));
3146 if (NUMERIC_ADDR_ERROR
)
3147 error ("Unknown host \"%s\"", SDATA (host
));
3149 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
3150 sizeof (address_in
.sin_addr
));
3154 #endif /* not HAVE_GETADDRINFO */
3156 ai
.ai_family
= family
;
3157 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3158 ai
.ai_addrlen
= sizeof address_in
;
3163 /* Previously this was compiled unconditionally, but that seems
3164 unnecessary on modern systems, and `unrequest_sigio' was a noop
3165 under X anyway. --lorentey */
3166 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3167 when connect is interrupted. So let's not let it get interrupted.
3168 Note we do not turn off polling, because polling is only used
3169 when not interrupt_input, and thus not normally used on the systems
3170 which have this bug. On systems which use polling, there's no way
3171 to quit if polling is turned off. */
3173 && !is_server
&& socktype
== SOCK_STREAM
)
3175 /* Comment from KFS: The original open-network-stream code
3176 didn't unwind protect this, but it seems like the proper
3177 thing to do. In any case, I don't see how it could harm to
3178 do this -- and it makes cleanup (using unbind_to) easier. */
3179 record_unwind_protect (unwind_request_sigio
, Qnil
);
3184 /* Do this in case we never enter the for-loop below. */
3185 count1
= SPECPDL_INDEX ();
3188 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3194 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3201 #ifdef DATAGRAM_SOCKETS
3202 if (!is_server
&& socktype
== SOCK_DGRAM
)
3204 #endif /* DATAGRAM_SOCKETS */
3206 #ifdef NON_BLOCKING_CONNECT
3207 if (is_non_blocking_client
)
3210 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3212 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3224 /* Make us close S if quit. */
3225 record_unwind_protect (close_file_unwind
, make_number (s
));
3227 /* Parse network options in the arg list.
3228 We simply ignore anything which isn't a known option (including other keywords).
3229 An error is signalled if setting a known option fails. */
3230 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3231 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3235 /* Configure as a server socket. */
3237 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3238 explicit :reuseaddr key to override this. */
3239 #ifdef HAVE_LOCAL_SOCKETS
3240 if (family
!= AF_LOCAL
)
3242 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3245 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3246 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3249 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3250 report_file_error ("Cannot bind server socket", Qnil
);
3252 #ifdef HAVE_GETSOCKNAME
3253 if (EQ (service
, Qt
))
3255 struct sockaddr_in sa1
;
3256 int len1
= sizeof (sa1
);
3257 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3259 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3260 service
= make_number (ntohs (sa1
.sin_port
));
3261 contact
= Fplist_put (contact
, QCservice
, service
);
3266 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3267 report_file_error ("Cannot listen on server socket", Qnil
);
3275 /* This turns off all alarm-based interrupts; the
3276 bind_polling_period call above doesn't always turn all the
3277 short-interval ones off, especially if interrupt_input is
3280 It'd be nice to be able to control the connect timeout
3281 though. Would non-blocking connect calls be portable?
3283 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3285 turn_on_atimers (0);
3287 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3290 turn_on_atimers (1);
3292 if (ret
== 0 || xerrno
== EISCONN
)
3294 /* The unwind-protect will be discarded afterwards.
3295 Likewise for immediate_quit. */
3299 #ifdef NON_BLOCKING_CONNECT
3301 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3305 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3313 /* Discard the unwind protect closing S. */
3314 specpdl_ptr
= specpdl
+ count1
;
3318 if (xerrno
== EINTR
)
3324 #ifdef DATAGRAM_SOCKETS
3325 if (socktype
== SOCK_DGRAM
)
3327 if (datagram_address
[s
].sa
)
3329 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3330 datagram_address
[s
].len
= lres
->ai_addrlen
;
3334 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3335 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3338 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3339 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3340 conv_lisp_to_sockaddr (rfamily
, remote
,
3341 datagram_address
[s
].sa
, rlen
);
3345 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3348 contact
= Fplist_put (contact
, QCaddress
,
3349 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3350 #ifdef HAVE_GETSOCKNAME
3353 struct sockaddr_in sa1
;
3354 int len1
= sizeof (sa1
);
3355 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3356 contact
= Fplist_put (contact
, QClocal
,
3357 conv_sockaddr_to_lisp (&sa1
, len1
));
3364 #ifdef HAVE_GETADDRINFO
3373 /* Discard the unwind protect for closing S, if any. */
3374 specpdl_ptr
= specpdl
+ count1
;
3376 /* Unwind bind_polling_period and request_sigio. */
3377 unbind_to (count
, Qnil
);
3381 /* If non-blocking got this far - and failed - assume non-blocking is
3382 not supported after all. This is probably a wrong assumption, but
3383 the normal blocking calls to open-network-stream handles this error
3385 if (is_non_blocking_client
)
3390 report_file_error ("make server process failed", contact
);
3392 report_file_error ("make client process failed", contact
);
3395 #endif /* not TERM */
3401 buffer
= Fget_buffer_create (buffer
);
3402 proc
= make_process (name
);
3404 chan_process
[inch
] = proc
;
3407 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3410 fcntl (inch
, F_SETFL
, O_NDELAY
);
3414 p
= XPROCESS (proc
);
3416 p
->childp
= contact
;
3417 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3420 p
->sentinel
= sentinel
;
3422 p
->filter_multibyte
= !NILP (buffer_defaults
.enable_multibyte_characters
);
3423 /* Override the above only if :filter-multibyte is specified. */
3424 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3425 p
->filter_multibyte
= !NILP (Fplist_get (contact
, QCfilter_multibyte
));
3426 p
->log
= Fplist_get (contact
, QClog
);
3427 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3428 p
->kill_without_query
= 1;
3429 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3434 if (is_server
&& socktype
== SOCK_STREAM
)
3435 p
->status
= Qlisten
;
3437 /* Make the process marker point into the process buffer (if any). */
3438 if (BUFFERP (buffer
))
3439 set_marker_both (p
->mark
, buffer
,
3440 BUF_ZV (XBUFFER (buffer
)),
3441 BUF_ZV_BYTE (XBUFFER (buffer
)));
3443 #ifdef NON_BLOCKING_CONNECT
3444 if (is_non_blocking_client
)
3446 /* We may get here if connect did succeed immediately. However,
3447 in that case, we still need to signal this like a non-blocking
3449 p
->status
= Qconnect
;
3450 if (!FD_ISSET (inch
, &connect_wait_mask
))
3452 FD_SET (inch
, &connect_wait_mask
);
3453 num_pending_connects
++;
3458 /* A server may have a client filter setting of Qt, but it must
3459 still listen for incoming connects unless it is stopped. */
3460 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3461 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3463 FD_SET (inch
, &input_wait_mask
);
3464 FD_SET (inch
, &non_keyboard_wait_mask
);
3467 if (inch
> max_process_desc
)
3468 max_process_desc
= inch
;
3470 tem
= Fplist_member (contact
, QCcoding
);
3471 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3472 tem
= Qnil
; /* No error message (too late!). */
3475 /* Setup coding systems for communicating with the network stream. */
3476 struct gcpro gcpro1
;
3477 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3478 Lisp_Object coding_systems
= Qt
;
3479 Lisp_Object args
[5], val
;
3483 val
= XCAR (XCDR (tem
));
3487 else if (!NILP (Vcoding_system_for_read
))
3488 val
= Vcoding_system_for_read
;
3489 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3490 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3491 /* We dare not decode end-of-line format by setting VAL to
3492 Qraw_text, because the existing Emacs Lisp libraries
3493 assume that they receive bare code including a sequene of
3498 if (NILP (host
) || NILP (service
))
3499 coding_systems
= Qnil
;
3502 args
[0] = Qopen_network_stream
, args
[1] = name
,
3503 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3505 coding_systems
= Ffind_operation_coding_system (5, args
);
3508 if (CONSP (coding_systems
))
3509 val
= XCAR (coding_systems
);
3510 else if (CONSP (Vdefault_process_coding_system
))
3511 val
= XCAR (Vdefault_process_coding_system
);
3515 p
->decode_coding_system
= val
;
3519 val
= XCAR (XCDR (tem
));
3523 else if (!NILP (Vcoding_system_for_write
))
3524 val
= Vcoding_system_for_write
;
3525 else if (NILP (current_buffer
->enable_multibyte_characters
))
3529 if (EQ (coding_systems
, Qt
))
3531 if (NILP (host
) || NILP (service
))
3532 coding_systems
= Qnil
;
3535 args
[0] = Qopen_network_stream
, args
[1] = name
,
3536 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3538 coding_systems
= Ffind_operation_coding_system (5, args
);
3542 if (CONSP (coding_systems
))
3543 val
= XCDR (coding_systems
);
3544 else if (CONSP (Vdefault_process_coding_system
))
3545 val
= XCDR (Vdefault_process_coding_system
);
3549 p
->encode_coding_system
= val
;
3551 setup_process_coding_systems (proc
);
3553 p
->decoding_buf
= make_uninit_string (0);
3554 p
->decoding_carryover
= 0;
3555 p
->encoding_buf
= make_uninit_string (0);
3557 p
->inherit_coding_system_flag
3558 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3563 #endif /* HAVE_SOCKETS */
3566 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3569 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3570 doc
: /* Return an alist of all network interfaces and their network address.
3571 Each element is a cons, the car of which is a string containing the
3572 interface name, and the cdr is the network address in internal
3573 format; see the description of ADDRESS in `make-network-process'. */)
3576 struct ifconf ifconf
;
3577 struct ifreq
*ifreqs
= NULL
;
3582 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3588 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3589 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3596 ifconf
.ifc_len
= buf_size
;
3597 ifconf
.ifc_req
= ifreqs
;
3598 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3604 if (ifconf
.ifc_len
== buf_size
)
3608 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3611 while (--ifaces
>= 0)
3613 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3614 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3615 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3617 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3618 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3619 res
= Fcons (Fcons (build_string (namebuf
),
3620 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3621 sizeof (struct sockaddr
))),
3627 #endif /* SIOCGIFCONF */
3629 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3636 static struct ifflag_def ifflag_table
[] = {
3640 #ifdef IFF_BROADCAST
3641 { IFF_BROADCAST
, "broadcast" },
3644 { IFF_DEBUG
, "debug" },
3647 { IFF_LOOPBACK
, "loopback" },
3649 #ifdef IFF_POINTOPOINT
3650 { IFF_POINTOPOINT
, "pointopoint" },
3653 { IFF_RUNNING
, "running" },
3656 { IFF_NOARP
, "noarp" },
3659 { IFF_PROMISC
, "promisc" },
3661 #ifdef IFF_NOTRAILERS
3662 { IFF_NOTRAILERS
, "notrailers" },
3665 { IFF_ALLMULTI
, "allmulti" },
3668 { IFF_MASTER
, "master" },
3671 { IFF_SLAVE
, "slave" },
3673 #ifdef IFF_MULTICAST
3674 { IFF_MULTICAST
, "multicast" },
3677 { IFF_PORTSEL
, "portsel" },
3679 #ifdef IFF_AUTOMEDIA
3680 { IFF_AUTOMEDIA
, "automedia" },
3683 { IFF_DYNAMIC
, "dynamic" },
3686 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3689 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3692 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3695 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3698 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3703 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3704 doc
: /* Return information about network interface named IFNAME.
3705 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3706 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3707 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3708 FLAGS is the current flags of the interface. */)
3713 Lisp_Object res
= Qnil
;
3718 CHECK_STRING (ifname
);
3720 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3721 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3723 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3728 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3729 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3731 int flags
= rq
.ifr_flags
;
3732 struct ifflag_def
*fp
;
3736 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3738 if (flags
& fp
->flag_bit
)
3740 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3741 flags
-= fp
->flag_bit
;
3744 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3746 if (flags
& (1 << fnum
))
3748 elt
= Fcons (make_number (fnum
), elt
);
3753 res
= Fcons (elt
, res
);
3756 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3757 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3759 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3760 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3764 for (n
= 0; n
< 6; n
++)
3765 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3766 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3769 res
= Fcons (elt
, res
);
3772 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3773 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3776 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3777 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3779 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3783 res
= Fcons (elt
, res
);
3786 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3787 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3790 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3793 res
= Fcons (elt
, res
);
3796 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3797 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3800 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3803 res
= Fcons (elt
, res
);
3807 return any
? res
: Qnil
;
3810 #endif /* HAVE_SOCKETS */
3812 /* Turn off input and output for process PROC. */
3815 deactivate_process (proc
)
3818 register int inchannel
, outchannel
;
3819 register struct Lisp_Process
*p
= XPROCESS (proc
);
3821 inchannel
= p
->infd
;
3822 outchannel
= p
->outfd
;
3824 #ifdef ADAPTIVE_READ_BUFFERING
3825 if (p
->read_output_delay
> 0)
3827 if (--process_output_delay_count
< 0)
3828 process_output_delay_count
= 0;
3829 p
->read_output_delay
= 0;
3830 p
->read_output_skip
= 0;
3836 /* Beware SIGCHLD hereabouts. */
3837 flush_pending_output (inchannel
);
3840 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3841 sys$
dassgn (outchannel
);
3842 vs
= get_vms_process_pointer (p
->pid
);
3844 give_back_vms_process_stuff (vs
);
3847 emacs_close (inchannel
);
3848 if (outchannel
>= 0 && outchannel
!= inchannel
)
3849 emacs_close (outchannel
);
3854 #ifdef DATAGRAM_SOCKETS
3855 if (DATAGRAM_CHAN_P (inchannel
))
3857 xfree (datagram_address
[inchannel
].sa
);
3858 datagram_address
[inchannel
].sa
= 0;
3859 datagram_address
[inchannel
].len
= 0;
3862 chan_process
[inchannel
] = Qnil
;
3863 FD_CLR (inchannel
, &input_wait_mask
);
3864 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3865 #ifdef NON_BLOCKING_CONNECT
3866 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3868 FD_CLR (inchannel
, &connect_wait_mask
);
3869 if (--num_pending_connects
< 0)
3873 if (inchannel
== max_process_desc
)
3876 /* We just closed the highest-numbered process input descriptor,
3877 so recompute the highest-numbered one now. */
3878 max_process_desc
= 0;
3879 for (i
= 0; i
< MAXDESC
; i
++)
3880 if (!NILP (chan_process
[i
]))
3881 max_process_desc
= i
;
3886 /* Close all descriptors currently in use for communication
3887 with subprocess. This is used in a newly-forked subprocess
3888 to get rid of irrelevant descriptors. */
3891 close_process_descs ()
3895 for (i
= 0; i
< MAXDESC
; i
++)
3897 Lisp_Object process
;
3898 process
= chan_process
[i
];
3899 if (!NILP (process
))
3901 int in
= XPROCESS (process
)->infd
;
3902 int out
= XPROCESS (process
)->outfd
;
3905 if (out
>= 0 && in
!= out
)
3912 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3914 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3915 It is read into the process' buffers or given to their filter functions.
3916 Non-nil arg PROCESS means do not return until some output has been received
3919 Non-nil second arg SECONDS and third arg MILLISEC are number of
3920 seconds and milliseconds to wait; return after that much time whether
3921 or not there is input. If SECONDS is a floating point number,
3922 it specifies a fractional number of seconds to wait.
3924 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3925 from PROCESS, suspending reading output from other processes.
3926 If JUST-THIS-ONE is an integer, don't run any timers either.
3927 Return non-nil if we received any output before the timeout expired. */)
3928 (process
, seconds
, millisec
, just_this_one
)
3929 register Lisp_Object process
, seconds
, millisec
, just_this_one
;
3931 int secs
, usecs
= 0;
3933 if (! NILP (process
))
3934 CHECK_PROCESS (process
);
3936 just_this_one
= Qnil
;
3938 if (!NILP (seconds
))
3940 if (INTEGERP (seconds
))
3941 secs
= XINT (seconds
);
3942 else if (FLOATP (seconds
))
3944 double timeout
= XFLOAT_DATA (seconds
);
3945 secs
= (int) timeout
;
3946 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3949 wrong_type_argument (Qnumberp
, seconds
);
3951 if (INTEGERP (millisec
))
3954 usecs
+= XINT (millisec
) * 1000;
3955 carry
= usecs
/ 1000000;
3957 if ((usecs
-= carry
* 1000000) < 0)
3964 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3965 secs
= -1, usecs
= 0;
3968 secs
= NILP (process
) ? -1 : 0;
3971 (wait_reading_process_output (secs
, usecs
, 0, 0,
3973 !NILP (process
) ? XPROCESS (process
) : NULL
,
3974 NILP (just_this_one
) ? 0 :
3975 !INTEGERP (just_this_one
) ? 1 : -1)
3979 /* Accept a connection for server process SERVER on CHANNEL. */
3981 static int connect_counter
= 0;
3984 server_accept_connection (server
, channel
)
3988 Lisp_Object proc
, caller
, name
, buffer
;
3989 Lisp_Object contact
, host
, service
;
3990 struct Lisp_Process
*ps
= XPROCESS (server
);
3991 struct Lisp_Process
*p
;
3995 struct sockaddr_in in
;
3997 struct sockaddr_in6 in6
;
3999 #ifdef HAVE_LOCAL_SOCKETS
4000 struct sockaddr_un un
;
4003 int len
= sizeof saddr
;
4005 s
= accept (channel
, &saddr
.sa
, &len
);
4014 if (code
== EWOULDBLOCK
)
4018 if (!NILP (ps
->log
))
4019 call3 (ps
->log
, server
, Qnil
,
4020 concat3 (build_string ("accept failed with code"),
4021 Fnumber_to_string (make_number (code
)),
4022 build_string ("\n")));
4028 /* Setup a new process to handle the connection. */
4030 /* Generate a unique identification of the caller, and build contact
4031 information for this process. */
4034 switch (saddr
.sa
.sa_family
)
4038 Lisp_Object args
[5];
4039 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4040 args
[0] = build_string ("%d.%d.%d.%d");
4041 args
[1] = make_number (*ip
++);
4042 args
[2] = make_number (*ip
++);
4043 args
[3] = make_number (*ip
++);
4044 args
[4] = make_number (*ip
++);
4045 host
= Fformat (5, args
);
4046 service
= make_number (ntohs (saddr
.in
.sin_port
));
4048 args
[0] = build_string (" <%s:%d>");
4051 caller
= Fformat (3, args
);
4058 Lisp_Object args
[9];
4059 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4061 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4062 for (i
= 0; i
< 8; i
++)
4063 args
[i
+1] = make_number (ntohs(ip6
[i
]));
4064 host
= Fformat (9, args
);
4065 service
= make_number (ntohs (saddr
.in
.sin_port
));
4067 args
[0] = build_string (" <[%s]:%d>");
4070 caller
= Fformat (3, args
);
4075 #ifdef HAVE_LOCAL_SOCKETS
4079 caller
= Fnumber_to_string (make_number (connect_counter
));
4080 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
4084 /* Create a new buffer name for this process if it doesn't have a
4085 filter. The new buffer name is based on the buffer name or
4086 process name of the server process concatenated with the caller
4089 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4093 buffer
= ps
->buffer
;
4095 buffer
= Fbuffer_name (buffer
);
4100 buffer
= concat2 (buffer
, caller
);
4101 buffer
= Fget_buffer_create (buffer
);
4105 /* Generate a unique name for the new server process. Combine the
4106 server process name with the caller identification. */
4108 name
= concat2 (ps
->name
, caller
);
4109 proc
= make_process (name
);
4111 chan_process
[s
] = proc
;
4114 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4117 fcntl (s
, F_SETFL
, O_NDELAY
);
4121 p
= XPROCESS (proc
);
4123 /* Build new contact information for this setup. */
4124 contact
= Fcopy_sequence (ps
->childp
);
4125 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4126 contact
= Fplist_put (contact
, QChost
, host
);
4127 if (!NILP (service
))
4128 contact
= Fplist_put (contact
, QCservice
, service
);
4129 contact
= Fplist_put (contact
, QCremote
,
4130 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4131 #ifdef HAVE_GETSOCKNAME
4133 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4134 contact
= Fplist_put (contact
, QClocal
,
4135 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4138 p
->childp
= contact
;
4139 p
->plist
= Fcopy_sequence (ps
->plist
);
4142 p
->sentinel
= ps
->sentinel
;
4143 p
->filter
= ps
->filter
;
4150 /* Client processes for accepted connections are not stopped initially. */
4151 if (!EQ (p
->filter
, Qt
))
4153 FD_SET (s
, &input_wait_mask
);
4154 FD_SET (s
, &non_keyboard_wait_mask
);
4157 if (s
> max_process_desc
)
4158 max_process_desc
= s
;
4160 /* Setup coding system for new process based on server process.
4161 This seems to be the proper thing to do, as the coding system
4162 of the new process should reflect the settings at the time the
4163 server socket was opened; not the current settings. */
4165 p
->decode_coding_system
= ps
->decode_coding_system
;
4166 p
->encode_coding_system
= ps
->encode_coding_system
;
4167 setup_process_coding_systems (proc
);
4169 p
->decoding_buf
= make_uninit_string (0);
4170 p
->decoding_carryover
= 0;
4171 p
->encoding_buf
= make_uninit_string (0);
4173 p
->inherit_coding_system_flag
4174 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4176 if (!NILP (ps
->log
))
4177 call3 (ps
->log
, server
, proc
,
4178 concat3 (build_string ("accept from "),
4179 (STRINGP (host
) ? host
: build_string ("-")),
4180 build_string ("\n")));
4182 if (!NILP (p
->sentinel
))
4183 exec_sentinel (proc
,
4184 concat3 (build_string ("open from "),
4185 (STRINGP (host
) ? host
: build_string ("-")),
4186 build_string ("\n")));
4189 /* This variable is different from waiting_for_input in keyboard.c.
4190 It is used to communicate to a lisp process-filter/sentinel (via the
4191 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4192 for user-input when that process-filter was called.
4193 waiting_for_input cannot be used as that is by definition 0 when
4194 lisp code is being evalled.
4195 This is also used in record_asynch_buffer_change.
4196 For that purpose, this must be 0
4197 when not inside wait_reading_process_output. */
4198 static int waiting_for_user_input_p
;
4201 wait_reading_process_output_unwind (data
)
4204 waiting_for_user_input_p
= XINT (data
);
4208 /* This is here so breakpoints can be put on it. */
4210 wait_reading_process_output_1 ()
4214 /* Use a wrapper around select to work around a bug in gdb 5.3.
4215 Normally, the wrapper is optimzed away by inlining.
4217 If emacs is stopped inside select, the gdb backtrace doesn't
4218 show the function which called select, so it is practically
4219 impossible to step through wait_reading_process_output. */
4223 select_wrapper (n
, rfd
, wfd
, xfd
, tmo
)
4225 SELECT_TYPE
*rfd
, *wfd
, *xfd
;
4228 return select (n
, rfd
, wfd
, xfd
, tmo
);
4230 #define select select_wrapper
4233 /* Read and dispose of subprocess output while waiting for timeout to
4234 elapse and/or keyboard input to be available.
4237 timeout in seconds, or
4238 zero for no limit, or
4239 -1 means gobble data immediately available but don't wait for any.
4242 an additional duration to wait, measured in microseconds.
4243 If this is nonzero and time_limit is 0, then the timeout
4244 consists of MICROSECS only.
4246 READ_KBD is a lisp value:
4247 0 to ignore keyboard input, or
4248 1 to return when input is available, or
4249 -1 meaning caller will actually read the input, so don't throw to
4250 the quit handler, or
4252 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4253 output that arrives.
4255 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4256 (and gobble terminal input into the buffer if any arrives).
4258 If WAIT_PROC is specified, wait until something arrives from that
4259 process. The return value is true if we read some input from
4262 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4263 (suspending output from other processes). A negative value
4264 means don't run any timers either.
4266 If WAIT_PROC is specified, then the function returns true if we
4267 received input from that process before the timeout elapsed.
4268 Otherwise, return true if we received input from any process. */
4271 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4272 wait_for_cell
, wait_proc
, just_wait_proc
)
4273 int time_limit
, microsecs
, read_kbd
, do_display
;
4274 Lisp_Object wait_for_cell
;
4275 struct Lisp_Process
*wait_proc
;
4278 register int channel
, nfds
;
4279 SELECT_TYPE Available
;
4280 #ifdef NON_BLOCKING_CONNECT
4281 SELECT_TYPE Connecting
;
4284 int check_delay
, no_avail
;
4287 EMACS_TIME timeout
, end_time
;
4288 int wait_channel
= -1;
4289 int got_some_input
= 0;
4290 int count
= SPECPDL_INDEX ();
4292 FD_ZERO (&Available
);
4293 #ifdef NON_BLOCKING_CONNECT
4294 FD_ZERO (&Connecting
);
4297 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4298 if (wait_proc
!= NULL
)
4299 wait_channel
= wait_proc
->infd
;
4301 record_unwind_protect (wait_reading_process_output_unwind
,
4302 make_number (waiting_for_user_input_p
));
4303 waiting_for_user_input_p
= read_kbd
;
4305 /* Since we may need to wait several times,
4306 compute the absolute time to return at. */
4307 if (time_limit
|| microsecs
)
4309 EMACS_GET_TIME (end_time
);
4310 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4311 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4313 #ifdef POLL_INTERRUPTED_SYS_CALL
4314 /* AlainF 5-Jul-1996
4315 HP-UX 10.10 seem to have problems with signals coming in
4316 Causes "poll: interrupted system call" messages when Emacs is run
4318 Turn off periodic alarms (in case they are in use),
4319 and then turn off any other atimers. */
4321 turn_on_atimers (0);
4322 #endif /* POLL_INTERRUPTED_SYS_CALL */
4326 int timeout_reduced_for_timers
= 0;
4328 /* If calling from keyboard input, do not quit
4329 since we want to return C-g as an input character.
4330 Otherwise, do pending quit if requested. */
4334 else if (interrupt_input_pending
)
4335 handle_async_input ();
4338 /* Exit now if the cell we're waiting for became non-nil. */
4339 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4342 /* Compute time from now till when time limit is up */
4343 /* Exit if already run out */
4344 if (time_limit
== -1)
4346 /* -1 specified for timeout means
4347 gobble output available now
4348 but don't wait at all. */
4350 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4352 else if (time_limit
|| microsecs
)
4354 EMACS_GET_TIME (timeout
);
4355 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4356 if (EMACS_TIME_NEG_P (timeout
))
4361 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4364 /* Normally we run timers here.
4365 But not if wait_for_cell; in those cases,
4366 the wait is supposed to be short,
4367 and those callers cannot handle running arbitrary Lisp code here. */
4368 if (NILP (wait_for_cell
)
4369 && just_wait_proc
>= 0)
4371 EMACS_TIME timer_delay
;
4375 int old_timers_run
= timers_run
;
4376 struct buffer
*old_buffer
= current_buffer
;
4378 timer_delay
= timer_check (1);
4380 /* If a timer has run, this might have changed buffers
4381 an alike. Make read_key_sequence aware of that. */
4382 if (timers_run
!= old_timers_run
4383 && old_buffer
!= current_buffer
4384 && waiting_for_user_input_p
== -1)
4385 record_asynch_buffer_change ();
4387 if (timers_run
!= old_timers_run
&& do_display
)
4388 /* We must retry, since a timer may have requeued itself
4389 and that could alter the time_delay. */
4390 redisplay_preserve_echo_area (9);
4394 while (!detect_input_pending ());
4396 /* If there is unread keyboard input, also return. */
4398 && requeued_events_pending_p ())
4401 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4403 EMACS_TIME difference
;
4404 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4405 if (EMACS_TIME_NEG_P (difference
))
4407 timeout
= timer_delay
;
4408 timeout_reduced_for_timers
= 1;
4411 /* If time_limit is -1, we are not going to wait at all. */
4412 else if (time_limit
!= -1)
4414 /* This is so a breakpoint can be put here. */
4415 wait_reading_process_output_1 ();
4419 /* Cause C-g and alarm signals to take immediate action,
4420 and cause input available signals to zero out timeout.
4422 It is important that we do this before checking for process
4423 activity. If we get a SIGCHLD after the explicit checks for
4424 process activity, timeout is the only way we will know. */
4426 set_waiting_for_input (&timeout
);
4428 /* If status of something has changed, and no input is
4429 available, notify the user of the change right away. After
4430 this explicit check, we'll let the SIGCHLD handler zap
4431 timeout to get our attention. */
4432 if (update_tick
!= process_tick
&& do_display
)
4435 #ifdef NON_BLOCKING_CONNECT
4439 Atemp
= input_wait_mask
;
4441 /* On Mac OS X 10.0, the SELECT system call always says input is
4442 present (for reading) at stdin, even when none is. This
4443 causes the call to SELECT below to return 1 and
4444 status_notify not to be called. As a result output of
4445 subprocesses are incorrectly discarded.
4449 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4451 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4452 if ((select (max (max (max_process_desc
, max_keyboard_desc
),
4455 #ifdef NON_BLOCKING_CONNECT
4456 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4460 (SELECT_TYPE
*)0, &timeout
)
4463 /* It's okay for us to do this and then continue with
4464 the loop, since timeout has already been zeroed out. */
4465 clear_waiting_for_input ();
4466 status_notify (NULL
);
4470 /* Don't wait for output from a non-running process. Just
4471 read whatever data has already been received. */
4472 if (wait_proc
&& wait_proc
->raw_status_new
)
4473 update_status (wait_proc
);
4475 && ! EQ (wait_proc
->status
, Qrun
)
4476 && ! EQ (wait_proc
->status
, Qconnect
))
4478 int nread
, total_nread
= 0;
4480 clear_waiting_for_input ();
4481 XSETPROCESS (proc
, wait_proc
);
4483 /* Read data from the process, until we exhaust it. */
4484 while (wait_proc
->infd
>= 0)
4486 nread
= read_process_output (proc
, wait_proc
->infd
);
4492 total_nread
+= nread
;
4494 else if (nread
== -1 && EIO
== errno
)
4498 else if (nread
== -1 && EAGAIN
== errno
)
4502 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4506 if (total_nread
> 0 && do_display
)
4507 redisplay_preserve_echo_area (10);
4512 /* Wait till there is something to do */
4514 if (wait_proc
&& just_wait_proc
)
4516 if (wait_proc
->infd
< 0) /* Terminated */
4518 FD_SET (wait_proc
->infd
, &Available
);
4520 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4522 else if (!NILP (wait_for_cell
))
4524 Available
= non_process_wait_mask
;
4526 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4531 Available
= non_keyboard_wait_mask
;
4533 Available
= input_wait_mask
;
4534 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4535 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4538 /* If frame size has changed or the window is newly mapped,
4539 redisplay now, before we start to wait. There is a race
4540 condition here; if a SIGIO arrives between now and the select
4541 and indicates that a frame is trashed, the select may block
4542 displaying a trashed screen. */
4543 if (frame_garbaged
&& do_display
)
4545 clear_waiting_for_input ();
4546 redisplay_preserve_echo_area (11);
4548 set_waiting_for_input (&timeout
);
4552 if (read_kbd
&& detect_input_pending ())
4559 #ifdef NON_BLOCKING_CONNECT
4561 Connecting
= connect_wait_mask
;
4564 #ifdef ADAPTIVE_READ_BUFFERING
4565 /* Set the timeout for adaptive read buffering if any
4566 process has non-zero read_output_skip and non-zero
4567 read_output_delay, and we are not reading output for a
4568 specific wait_channel. It is not executed if
4569 Vprocess_adaptive_read_buffering is nil. */
4570 if (process_output_skip
&& check_delay
> 0)
4572 int usecs
= EMACS_USECS (timeout
);
4573 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4574 usecs
= READ_OUTPUT_DELAY_MAX
;
4575 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4577 proc
= chan_process
[channel
];
4580 /* Find minimum non-zero read_output_delay among the
4581 processes with non-zero read_output_skip. */
4582 if (XPROCESS (proc
)->read_output_delay
> 0)
4585 if (!XPROCESS (proc
)->read_output_skip
)
4587 FD_CLR (channel
, &Available
);
4588 XPROCESS (proc
)->read_output_skip
= 0;
4589 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4590 usecs
= XPROCESS (proc
)->read_output_delay
;
4593 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4594 process_output_skip
= 0;
4598 nfds
= select (max (max (max_process_desc
, max_keyboard_desc
),
4601 #ifdef NON_BLOCKING_CONNECT
4602 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4606 (SELECT_TYPE
*)0, &timeout
);
4611 /* Make C-g and alarm signals set flags again */
4612 clear_waiting_for_input ();
4614 /* If we woke up due to SIGWINCH, actually change size now. */
4615 do_pending_window_change (0);
4617 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4618 /* We wanted the full specified time, so return now. */
4622 if (xerrno
== EINTR
)
4625 /* Ultrix select seems to return ENOMEM when it is
4626 interrupted. Treat it just like EINTR. Bleah. Note
4627 that we want to test for the "ultrix" CPP symbol, not
4628 "__ultrix__"; the latter is only defined under GCC, but
4629 not by DEC's bundled CC. -JimB */
4630 else if (xerrno
== ENOMEM
)
4634 /* This happens for no known reason on ALLIANT.
4635 I am guessing that this is the right response. -- RMS. */
4636 else if (xerrno
== EFAULT
)
4639 else if (xerrno
== EBADF
)
4642 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4643 the child's closure of the pts gives the parent a SIGHUP, and
4644 the ptc file descriptor is automatically closed,
4645 yielding EBADF here or at select() call above.
4646 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4647 in m/ibmrt-aix.h), and here we just ignore the select error.
4648 Cleanup occurs c/o status_notify after SIGCLD. */
4649 no_avail
= 1; /* Cannot depend on values returned */
4655 error ("select error: %s", emacs_strerror (xerrno
));
4660 FD_ZERO (&Available
);
4661 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4664 #if defined(sun) && !defined(USG5_4)
4665 if (nfds
> 0 && keyboard_bit_set (&Available
)
4667 /* System sometimes fails to deliver SIGIO.
4669 David J. Mackenzie says that Emacs doesn't compile under
4670 Solaris if this code is enabled, thus the USG5_4 in the CPP
4671 conditional. "I haven't noticed any ill effects so far.
4672 If you find a Solaris expert somewhere, they might know
4674 kill (getpid (), SIGIO
);
4677 #if 0 /* When polling is used, interrupt_input is 0,
4678 so get_input_pending should read the input.
4679 So this should not be needed. */
4680 /* If we are using polling for input,
4681 and we see input available, make it get read now.
4682 Otherwise it might not actually get read for a second.
4683 And on hpux, since we turn off polling in wait_reading_process_output,
4684 it might never get read at all if we don't spend much time
4685 outside of wait_reading_process_output. */
4686 if (read_kbd
&& interrupt_input
4687 && keyboard_bit_set (&Available
)
4688 && input_polling_used ())
4689 kill (getpid (), SIGALRM
);
4692 /* Check for keyboard input */
4693 /* If there is any, return immediately
4694 to give it higher priority than subprocesses */
4698 int old_timers_run
= timers_run
;
4699 struct buffer
*old_buffer
= current_buffer
;
4702 if (detect_input_pending_run_timers (do_display
))
4704 swallow_events (do_display
);
4705 if (detect_input_pending_run_timers (do_display
))
4709 /* If a timer has run, this might have changed buffers
4710 an alike. Make read_key_sequence aware of that. */
4711 if (timers_run
!= old_timers_run
4712 && waiting_for_user_input_p
== -1
4713 && old_buffer
!= current_buffer
)
4714 record_asynch_buffer_change ();
4720 /* If there is unread keyboard input, also return. */
4722 && requeued_events_pending_p ())
4725 /* If we are not checking for keyboard input now,
4726 do process events (but don't run any timers).
4727 This is so that X events will be processed.
4728 Otherwise they may have to wait until polling takes place.
4729 That would causes delays in pasting selections, for example.
4731 (We used to do this only if wait_for_cell.) */
4732 if (read_kbd
== 0 && detect_input_pending ())
4734 swallow_events (do_display
);
4735 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4736 if (detect_input_pending ())
4741 /* Exit now if the cell we're waiting for became non-nil. */
4742 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4746 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4747 go read it. This can happen with X on BSD after logging out.
4748 In that case, there really is no input and no SIGIO,
4749 but select says there is input. */
4751 if (read_kbd
&& interrupt_input
4752 && keyboard_bit_set (&Available
) && ! noninteractive
)
4753 kill (getpid (), SIGIO
);
4757 got_some_input
|= nfds
> 0;
4759 /* If checking input just got us a size-change event from X,
4760 obey it now if we should. */
4761 if (read_kbd
|| ! NILP (wait_for_cell
))
4762 do_pending_window_change (0);
4764 /* Check for data from a process. */
4765 if (no_avail
|| nfds
== 0)
4768 /* Really FIRST_PROC_DESC should be 0 on Unix,
4769 but this is safer in the short run. */
4770 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4772 if (FD_ISSET (channel
, &Available
)
4773 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4777 /* If waiting for this channel, arrange to return as
4778 soon as no more input to be processed. No more
4780 if (wait_channel
== channel
)
4786 proc
= chan_process
[channel
];
4790 /* If this is a server stream socket, accept connection. */
4791 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4793 server_accept_connection (proc
, channel
);
4797 /* Read data from the process, starting with our
4798 buffered-ahead character if we have one. */
4800 nread
= read_process_output (proc
, channel
);
4803 /* Since read_process_output can run a filter,
4804 which can call accept-process-output,
4805 don't try to read from any other processes
4806 before doing the select again. */
4807 FD_ZERO (&Available
);
4810 redisplay_preserve_echo_area (12);
4813 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4816 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4817 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4819 else if (nread
== -1 && errno
== EAGAIN
)
4823 else if (nread
== -1 && errno
== EAGAIN
)
4825 /* Note that we cannot distinguish between no input
4826 available now and a closed pipe.
4827 With luck, a closed pipe will be accompanied by
4828 subprocess termination and SIGCHLD. */
4829 else if (nread
== 0 && !NETCONN_P (proc
))
4831 #endif /* O_NDELAY */
4832 #endif /* O_NONBLOCK */
4834 /* On some OSs with ptys, when the process on one end of
4835 a pty exits, the other end gets an error reading with
4836 errno = EIO instead of getting an EOF (0 bytes read).
4837 Therefore, if we get an error reading and errno =
4838 EIO, just continue, because the child process has
4839 exited and should clean itself up soon (e.g. when we
4842 However, it has been known to happen that the SIGCHLD
4843 got lost. So raise the signal again just in case.
4845 else if (nread
== -1 && errno
== EIO
)
4847 /* Clear the descriptor now, so we only raise the signal once. */
4848 FD_CLR (channel
, &input_wait_mask
);
4849 FD_CLR (channel
, &non_keyboard_wait_mask
);
4851 kill (getpid (), SIGCHLD
);
4853 #endif /* HAVE_PTYS */
4854 /* If we can detect process termination, don't consider the process
4855 gone just because its pipe is closed. */
4857 else if (nread
== 0 && !NETCONN_P (proc
))
4862 /* Preserve status of processes already terminated. */
4863 XPROCESS (proc
)->tick
= ++process_tick
;
4864 deactivate_process (proc
);
4865 if (XPROCESS (proc
)->raw_status_new
)
4866 update_status (XPROCESS (proc
));
4867 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4868 XPROCESS (proc
)->status
4869 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4872 #ifdef NON_BLOCKING_CONNECT
4873 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4874 && FD_ISSET (channel
, &connect_wait_mask
))
4876 struct Lisp_Process
*p
;
4878 FD_CLR (channel
, &connect_wait_mask
);
4879 if (--num_pending_connects
< 0)
4882 proc
= chan_process
[channel
];
4886 p
= XPROCESS (proc
);
4889 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4890 So only use it on systems where it is known to work. */
4892 int xlen
= sizeof(xerrno
);
4893 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4898 struct sockaddr pname
;
4899 int pnamelen
= sizeof(pname
);
4901 /* If connection failed, getpeername will fail. */
4903 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4905 /* Obtain connect failure code through error slippage. */
4908 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4915 p
->tick
= ++process_tick
;
4916 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4917 deactivate_process (proc
);
4922 /* Execute the sentinel here. If we had relied on
4923 status_notify to do it later, it will read input
4924 from the process before calling the sentinel. */
4925 exec_sentinel (proc
, build_string ("open\n"));
4926 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4928 FD_SET (p
->infd
, &input_wait_mask
);
4929 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4933 #endif /* NON_BLOCKING_CONNECT */
4934 } /* end for each file descriptor */
4935 } /* end while exit conditions not met */
4937 unbind_to (count
, Qnil
);
4939 /* If calling from keyboard input, do not quit
4940 since we want to return C-g as an input character.
4941 Otherwise, do pending quit if requested. */
4944 /* Prevent input_pending from remaining set if we quit. */
4945 clear_input_pending ();
4948 #ifdef POLL_INTERRUPTED_SYS_CALL
4949 /* AlainF 5-Jul-1996
4950 HP-UX 10.10 seems to have problems with signals coming in
4951 Causes "poll: interrupted system call" messages when Emacs is run
4953 Turn periodic alarms back on */
4955 #endif /* POLL_INTERRUPTED_SYS_CALL */
4957 return got_some_input
;
4960 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4963 read_process_output_call (fun_and_args
)
4964 Lisp_Object fun_and_args
;
4966 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4970 read_process_output_error_handler (error
)
4973 cmd_error_internal (error
, "error in process filter: ");
4975 update_echo_area ();
4976 Fsleep_for (make_number (2), Qnil
);
4980 /* Read pending output from the process channel,
4981 starting with our buffered-ahead character if we have one.
4982 Yield number of decoded characters read.
4984 This function reads at most 4096 characters.
4985 If you want to read all available subprocess output,
4986 you must call it repeatedly until it returns zero.
4988 The characters read are decoded according to PROC's coding-system
4992 read_process_output (proc
, channel
)
4994 register int channel
;
4996 register int nbytes
;
4998 register Lisp_Object outstream
;
4999 register struct buffer
*old
= current_buffer
;
5000 register struct Lisp_Process
*p
= XPROCESS (proc
);
5001 register int opoint
;
5002 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5003 int carryover
= p
->decoding_carryover
;
5007 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5009 vs
= get_vms_process_pointer (p
->pid
);
5013 return (0); /* Really weird if it does this */
5014 if (!(vs
->iosb
[0] & 1))
5015 return -1; /* I/O error */
5018 error ("Could not get VMS process pointer");
5019 chars
= vs
->inputBuffer
;
5020 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
5023 start_vms_process_read (vs
); /* Crank up the next read on the process */
5024 return 1; /* Nothing worth printing, say we got 1 */
5028 /* The data carried over in the previous decoding (which are at
5029 the tail of decoding buffer) should be prepended to the new
5030 data read to decode all together. */
5031 chars
= (char *) alloca (nbytes
+ carryover
);
5032 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
5033 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
5037 chars
= (char *) alloca (carryover
+ readmax
);
5039 /* See the comment above. */
5040 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
5042 #ifdef DATAGRAM_SOCKETS
5043 /* We have a working select, so proc_buffered_char is always -1. */
5044 if (DATAGRAM_CHAN_P (channel
))
5046 int len
= datagram_address
[channel
].len
;
5047 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5048 0, datagram_address
[channel
].sa
, &len
);
5052 if (proc_buffered_char
[channel
] < 0)
5054 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5055 #ifdef ADAPTIVE_READ_BUFFERING
5056 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5058 int delay
= p
->read_output_delay
;
5061 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5064 process_output_delay_count
++;
5065 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5068 else if (delay
> 0 && (nbytes
== readmax
))
5070 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5072 process_output_delay_count
--;
5074 p
->read_output_delay
= delay
;
5077 p
->read_output_skip
= 1;
5078 process_output_skip
= 1;
5085 chars
[carryover
] = proc_buffered_char
[channel
];
5086 proc_buffered_char
[channel
] = -1;
5087 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5091 nbytes
= nbytes
+ 1;
5093 #endif /* not VMS */
5095 p
->decoding_carryover
= 0;
5097 /* At this point, NBYTES holds number of bytes just received
5098 (including the one in proc_buffered_char[channel]). */
5101 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5103 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5106 /* Now set NBYTES how many bytes we must decode. */
5107 nbytes
+= carryover
;
5109 /* Read and dispose of the process output. */
5110 outstream
= p
->filter
;
5111 if (!NILP (outstream
))
5113 /* We inhibit quit here instead of just catching it so that
5114 hitting ^G when a filter happens to be running won't screw
5116 int count
= SPECPDL_INDEX ();
5117 Lisp_Object odeactivate
;
5118 Lisp_Object obuffer
, okeymap
;
5120 int outer_running_asynch_code
= running_asynch_code
;
5121 int waiting
= waiting_for_user_input_p
;
5123 /* No need to gcpro these, because all we do with them later
5124 is test them for EQness, and none of them should be a string. */
5125 odeactivate
= Vdeactivate_mark
;
5126 XSETBUFFER (obuffer
, current_buffer
);
5127 okeymap
= current_buffer
->keymap
;
5129 specbind (Qinhibit_quit
, Qt
);
5130 specbind (Qlast_nonmenu_event
, Qt
);
5132 /* In case we get recursively called,
5133 and we already saved the match data nonrecursively,
5134 save the same match data in safely recursive fashion. */
5135 if (outer_running_asynch_code
)
5138 /* Don't clobber the CURRENT match data, either! */
5139 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5140 restore_search_regs ();
5141 record_unwind_save_match_data ();
5142 Fset_match_data (tem
, Qt
);
5145 /* For speed, if a search happens within this code,
5146 save the match data in a special nonrecursive fashion. */
5147 running_asynch_code
= 1;
5149 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5151 Vlast_coding_system_used
= coding
->symbol
;
5152 /* A new coding system might be found. */
5153 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5155 p
->decode_coding_system
= coding
->symbol
;
5157 /* Don't call setup_coding_system for
5158 proc_decode_coding_system[channel] here. It is done in
5159 detect_coding called via decode_coding above. */
5161 /* If a coding system for encoding is not yet decided, we set
5162 it as the same as coding-system for decoding.
5164 But, before doing that we must check if
5165 proc_encode_coding_system[p->outfd] surely points to a
5166 valid memory because p->outfd will be changed once EOF is
5167 sent to the process. */
5168 if (NILP (p
->encode_coding_system
)
5169 && proc_encode_coding_system
[p
->outfd
])
5171 p
->encode_coding_system
= coding
->symbol
;
5172 setup_coding_system (coding
->symbol
,
5173 proc_encode_coding_system
[p
->outfd
]);
5174 if (proc_encode_coding_system
[p
->outfd
]->eol_type
5175 == CODING_EOL_UNDECIDED
)
5176 proc_encode_coding_system
[p
->outfd
]->eol_type
5181 carryover
= nbytes
- coding
->consumed
;
5185 if (SCHARS (p
->decoding_buf
) < carryover
)
5186 p
->decoding_buf
= make_uninit_string (carryover
);
5187 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5189 p
->decoding_carryover
= carryover
;
5190 /* Adjust the multibyteness of TEXT to that of the filter. */
5191 if (!p
->filter_multibyte
!= !STRING_MULTIBYTE (text
))
5192 text
= (STRING_MULTIBYTE (text
)
5193 ? Fstring_as_unibyte (text
)
5194 : Fstring_to_multibyte (text
));
5195 if (SBYTES (text
) > 0)
5196 internal_condition_case_1 (read_process_output_call
,
5198 Fcons (proc
, Fcons (text
, Qnil
))),
5199 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5200 read_process_output_error_handler
);
5202 /* If we saved the match data nonrecursively, restore it now. */
5203 restore_search_regs ();
5204 running_asynch_code
= outer_running_asynch_code
;
5206 /* Handling the process output should not deactivate the mark. */
5207 Vdeactivate_mark
= odeactivate
;
5209 /* Restore waiting_for_user_input_p as it was
5210 when we were called, in case the filter clobbered it. */
5211 waiting_for_user_input_p
= waiting
;
5213 #if 0 /* Call record_asynch_buffer_change unconditionally,
5214 because we might have changed minor modes or other things
5215 that affect key bindings. */
5216 if (! EQ (Fcurrent_buffer (), obuffer
)
5217 || ! EQ (current_buffer
->keymap
, okeymap
))
5219 /* But do it only if the caller is actually going to read events.
5220 Otherwise there's no need to make him wake up, and it could
5221 cause trouble (for example it would make sit_for return). */
5222 if (waiting_for_user_input_p
== -1)
5223 record_asynch_buffer_change ();
5226 start_vms_process_read (vs
);
5228 unbind_to (count
, Qnil
);
5232 /* If no filter, write into buffer if it isn't dead. */
5233 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
5235 Lisp_Object old_read_only
;
5236 int old_begv
, old_zv
;
5237 int old_begv_byte
, old_zv_byte
;
5238 Lisp_Object odeactivate
;
5239 int before
, before_byte
;
5244 odeactivate
= Vdeactivate_mark
;
5246 Fset_buffer (p
->buffer
);
5248 opoint_byte
= PT_BYTE
;
5249 old_read_only
= current_buffer
->read_only
;
5252 old_begv_byte
= BEGV_BYTE
;
5253 old_zv_byte
= ZV_BYTE
;
5255 current_buffer
->read_only
= Qnil
;
5257 /* Insert new output into buffer
5258 at the current end-of-output marker,
5259 thus preserving logical ordering of input and output. */
5260 if (XMARKER (p
->mark
)->buffer
)
5261 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5262 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5265 SET_PT_BOTH (ZV
, ZV_BYTE
);
5267 before_byte
= PT_BYTE
;
5269 /* If the output marker is outside of the visible region, save
5270 the restriction and widen. */
5271 if (! (BEGV
<= PT
&& PT
<= ZV
))
5274 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5276 Vlast_coding_system_used
= coding
->symbol
;
5277 /* A new coding system might be found. See the comment in the
5278 similar code in the previous `if' block. */
5279 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5281 p
->decode_coding_system
= coding
->symbol
;
5282 if (NILP (p
->encode_coding_system
)
5283 && proc_encode_coding_system
[p
->outfd
])
5285 p
->encode_coding_system
= coding
->symbol
;
5286 setup_coding_system (coding
->symbol
,
5287 proc_encode_coding_system
[p
->outfd
]);
5288 if (proc_encode_coding_system
[p
->outfd
]->eol_type
5289 == CODING_EOL_UNDECIDED
)
5290 proc_encode_coding_system
[p
->outfd
]->eol_type
5294 carryover
= nbytes
- coding
->consumed
;
5298 if (SCHARS (p
->decoding_buf
) < carryover
)
5299 p
->decoding_buf
= make_uninit_string (carryover
);
5300 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5302 p
->decoding_carryover
= carryover
;
5304 /* Adjust the multibyteness of TEXT to that of the buffer. */
5305 if (NILP (current_buffer
->enable_multibyte_characters
)
5306 != ! STRING_MULTIBYTE (text
))
5307 text
= (STRING_MULTIBYTE (text
)
5308 ? Fstring_as_unibyte (text
)
5309 : Fstring_to_multibyte (text
));
5310 /* Insert before markers in case we are inserting where
5311 the buffer's mark is, and the user's next command is Meta-y. */
5312 insert_from_string_before_markers (text
, 0, 0,
5313 SCHARS (text
), SBYTES (text
), 0);
5315 /* Make sure the process marker's position is valid when the
5316 process buffer is changed in the signal_after_change above.
5317 W3 is known to do that. */
5318 if (BUFFERP (p
->buffer
)
5319 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5320 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5322 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5324 update_mode_lines
++;
5326 /* Make sure opoint and the old restrictions
5327 float ahead of any new text just as point would. */
5328 if (opoint
>= before
)
5330 opoint
+= PT
- before
;
5331 opoint_byte
+= PT_BYTE
- before_byte
;
5333 if (old_begv
> before
)
5335 old_begv
+= PT
- before
;
5336 old_begv_byte
+= PT_BYTE
- before_byte
;
5338 if (old_zv
>= before
)
5340 old_zv
+= PT
- before
;
5341 old_zv_byte
+= PT_BYTE
- before_byte
;
5344 /* If the restriction isn't what it should be, set it. */
5345 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5346 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5348 /* Handling the process output should not deactivate the mark. */
5349 Vdeactivate_mark
= odeactivate
;
5351 current_buffer
->read_only
= old_read_only
;
5352 SET_PT_BOTH (opoint
, opoint_byte
);
5353 set_buffer_internal (old
);
5356 start_vms_process_read (vs
);
5361 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5363 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5364 This is intended for use by asynchronous process output filters and sentinels. */)
5367 return (waiting_for_user_input_p
? Qt
: Qnil
);
5370 /* Sending data to subprocess */
5372 jmp_buf send_process_frame
;
5373 Lisp_Object process_sent_to
;
5376 send_process_trap ()
5378 SIGNAL_THREAD_CHECK (SIGPIPE
);
5383 sigunblock (sigmask (SIGPIPE
));
5384 longjmp (send_process_frame
, 1);
5387 /* Send some data to process PROC.
5388 BUF is the beginning of the data; LEN is the number of characters.
5389 OBJECT is the Lisp object that the data comes from. If OBJECT is
5390 nil or t, it means that the data comes from C string.
5392 If OBJECT is not nil, the data is encoded by PROC's coding-system
5393 for encoding before it is sent.
5395 This function can evaluate Lisp code and can garbage collect. */
5398 send_process (proc
, buf
, len
, object
)
5399 volatile Lisp_Object proc
;
5400 unsigned char *volatile buf
;
5402 volatile Lisp_Object object
;
5404 /* Use volatile to protect variables from being clobbered by longjmp. */
5405 struct Lisp_Process
*p
= XPROCESS (proc
);
5407 struct coding_system
*coding
;
5408 struct gcpro gcpro1
;
5409 SIGTYPE (*volatile old_sigpipe
) ();
5414 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5417 if (p
->raw_status_new
)
5419 if (! EQ (p
->status
, Qrun
))
5420 error ("Process %s not running", SDATA (p
->name
));
5422 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5424 coding
= proc_encode_coding_system
[p
->outfd
];
5425 Vlast_coding_system_used
= coding
->symbol
;
5427 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5428 || (BUFFERP (object
)
5429 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5432 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5433 /* The coding system for encoding was changed to raw-text
5434 because we sent a unibyte text previously. Now we are
5435 sending a multibyte text, thus we must encode it by the
5436 original coding system specified for the current process. */
5437 setup_coding_system (p
->encode_coding_system
, coding
);
5438 if (coding
->eol_type
== CODING_EOL_UNDECIDED
)
5439 coding
->eol_type
= system_eol_type
;
5440 /* src_multibyte should be set to 1 _after_ a call to
5441 setup_coding_system, since it resets src_multibyte to
5443 coding
->src_multibyte
= 1;
5447 /* For sending a unibyte text, character code conversion should
5448 not take place but EOL conversion should. So, setup raw-text
5449 or one of the subsidiary if we have not yet done it. */
5450 if (coding
->type
!= coding_type_raw_text
)
5452 if (CODING_REQUIRE_FLUSHING (coding
))
5454 /* But, before changing the coding, we must flush out data. */
5455 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5456 send_process (proc
, "", 0, Qt
);
5458 coding
->src_multibyte
= 0;
5459 setup_raw_text_coding_system (coding
);
5462 coding
->dst_multibyte
= 0;
5464 if (CODING_REQUIRE_ENCODING (coding
))
5466 int require
= encoding_buffer_size (coding
, len
);
5467 int from_byte
= -1, from
= -1, to
= -1;
5469 if (BUFFERP (object
))
5471 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5472 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5473 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5475 else if (STRINGP (object
))
5477 from_byte
= buf
- SDATA (object
);
5478 from
= string_byte_to_char (object
, from_byte
);
5479 to
= string_byte_to_char (object
, from_byte
+ len
);
5482 if (coding
->composing
!= COMPOSITION_DISABLED
)
5485 coding_save_composition (coding
, from
, to
, object
);
5487 coding
->composing
= COMPOSITION_DISABLED
;
5490 if (SBYTES (p
->encoding_buf
) < require
)
5491 p
->encoding_buf
= make_uninit_string (require
);
5494 buf
= (BUFFERP (object
)
5495 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5496 : SDATA (object
) + from_byte
);
5498 object
= p
->encoding_buf
;
5499 encode_coding (coding
, (char *) buf
, SDATA (object
),
5500 len
, SBYTES (object
));
5501 coding_free_composition_data (coding
);
5502 len
= coding
->produced
;
5503 buf
= SDATA (object
);
5507 vs
= get_vms_process_pointer (p
->pid
);
5509 error ("Could not find this process: %x", p
->pid
);
5510 else if (write_to_vms_process (vs
, buf
, len
))
5514 if (pty_max_bytes
== 0)
5516 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5517 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5518 if (pty_max_bytes
< 0)
5519 pty_max_bytes
= 250;
5521 pty_max_bytes
= 250;
5523 /* Deduct one, to leave space for the eof. */
5527 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5528 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5529 when returning with longjmp despite being declared volatile. */
5530 if (!setjmp (send_process_frame
))
5532 process_sent_to
= proc
;
5537 /* Decide how much data we can send in one batch.
5538 Long lines need to be split into multiple batches. */
5541 /* Starting this at zero is always correct when not the first
5542 iteration because the previous iteration ended by sending C-d.
5543 It may not be correct for the first iteration
5544 if a partial line was sent in a separate send_process call.
5545 If that proves worth handling, we need to save linepos
5546 in the process object. */
5548 unsigned char *ptr
= (unsigned char *) buf
;
5549 unsigned char *end
= (unsigned char *) buf
+ len
;
5551 /* Scan through this text for a line that is too long. */
5552 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5560 /* If we found one, break the line there
5561 and put in a C-d to force the buffer through. */
5565 /* Send this batch, using one or more write calls. */
5568 int outfd
= p
->outfd
;
5569 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5570 #ifdef DATAGRAM_SOCKETS
5571 if (DATAGRAM_CHAN_P (outfd
))
5573 rv
= sendto (outfd
, (char *) buf
, this,
5574 0, datagram_address
[outfd
].sa
,
5575 datagram_address
[outfd
].len
);
5576 if (rv
< 0 && errno
== EMSGSIZE
)
5578 signal (SIGPIPE
, old_sigpipe
);
5579 report_file_error ("sending datagram",
5580 Fcons (proc
, Qnil
));
5586 rv
= emacs_write (outfd
, (char *) buf
, this);
5587 #ifdef ADAPTIVE_READ_BUFFERING
5588 if (p
->read_output_delay
> 0
5589 && p
->adaptive_read_buffering
== 1)
5591 p
->read_output_delay
= 0;
5592 process_output_delay_count
--;
5593 p
->read_output_skip
= 0;
5597 signal (SIGPIPE
, old_sigpipe
);
5603 || errno
== EWOULDBLOCK
5609 /* Buffer is full. Wait, accepting input;
5610 that may allow the program
5611 to finish doing output and read more. */
5615 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5616 /* A gross hack to work around a bug in FreeBSD.
5617 In the following sequence, read(2) returns
5621 write(2) 954 bytes, get EAGAIN
5622 read(2) 1024 bytes in process_read_output
5623 read(2) 11 bytes in process_read_output
5625 That is, read(2) returns more bytes than have
5626 ever been written successfully. The 1033 bytes
5627 read are the 1022 bytes written successfully
5628 after processing (for example with CRs added if
5629 the terminal is set up that way which it is
5630 here). The same bytes will be seen again in a
5631 later read(2), without the CRs. */
5633 if (errno
== EAGAIN
)
5636 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5638 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5640 /* Running filters might relocate buffers or strings.
5641 Arrange to relocate BUF. */
5642 if (BUFFERP (object
))
5643 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5644 else if (STRINGP (object
))
5645 offset
= buf
- SDATA (object
);
5647 #ifdef EMACS_HAS_USECS
5648 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5650 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5653 if (BUFFERP (object
))
5654 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5655 else if (STRINGP (object
))
5656 buf
= offset
+ SDATA (object
);
5661 /* This is a real error. */
5662 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5669 /* If we sent just part of the string, put in an EOF
5670 to force it through, before we send the rest. */
5672 Fprocess_send_eof (proc
);
5675 #endif /* not VMS */
5678 signal (SIGPIPE
, old_sigpipe
);
5680 proc
= process_sent_to
;
5681 p
= XPROCESS (proc
);
5683 p
->raw_status_new
= 0;
5684 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5685 p
->tick
= ++process_tick
;
5686 deactivate_process (proc
);
5688 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5690 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5698 send_process_object_unwind (buf
)
5703 if (XBUFFER (buf
) == current_buffer
)
5705 tembuf
= Fcurrent_buffer ();
5707 Fkill_buffer (tembuf
);
5711 /* Send current contents of region between START and END to PROC.
5712 If START is a string, send it instead.
5713 This function can evaluate Lisp code and can garbage collect. */
5716 send_process_object (proc
, start
, end
)
5717 Lisp_Object proc
, start
, end
;
5719 int count
= SPECPDL_INDEX ();
5720 Lisp_Object object
= STRINGP (start
) ? start
: Fcurrent_buffer ();
5721 struct buffer
*given_buffer
= current_buffer
;
5725 record_unwind_protect (send_process_object_unwind
, Fcurrent_buffer ());
5727 if (STRINGP (object
) ? STRING_MULTIBYTE (object
)
5728 : ! NILP (XBUFFER (object
)->enable_multibyte_characters
))
5730 struct Lisp_Process
*p
= XPROCESS (proc
);
5731 struct coding_system
*coding
;
5733 if (p
->raw_status_new
)
5735 if (! EQ (p
->status
, Qrun
))
5736 error ("Process %s not running", SDATA (p
->name
));
5738 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5740 coding
= proc_encode_coding_system
[p
->outfd
];
5741 if (! EQ (coding
->symbol
, p
->encode_coding_system
))
5742 /* The coding system for encoding was changed to raw-text
5743 because we sent a unibyte text previously. Now we are
5744 sending a multibyte text, thus we must encode it by the
5745 original coding system specified for the current process. */
5746 setup_coding_system (p
->encode_coding_system
, coding
);
5747 if (! NILP (coding
->pre_write_conversion
))
5749 struct gcpro gcpro1
, gcpro2
;
5751 GCPRO2 (proc
, object
);
5752 call2 (coding
->pre_write_conversion
, start
, end
);
5754 if (given_buffer
!= current_buffer
)
5756 start
= make_number (BEGV
), end
= make_number (ZV
);
5757 object
= Fcurrent_buffer ();
5762 if (BUFFERP (object
))
5764 EMACS_INT start_byte
;
5766 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5767 move_gap (XINT (end
));
5768 start_byte
= CHAR_TO_BYTE (XINT (start
));
5769 buf
= BYTE_POS_ADDR (start_byte
);
5770 len
= CHAR_TO_BYTE (XINT (end
)) - start_byte
;
5774 buf
= SDATA (object
);
5775 len
= SBYTES (object
);
5777 send_process (proc
, buf
, len
, object
);
5779 unbind_to (count
, Qnil
);
5782 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5784 doc
: /* Send current contents of region as input to PROCESS.
5785 PROCESS may be a process, a buffer, the name of a process or buffer, or
5786 nil, indicating the current buffer's process.
5787 Called from program, takes three arguments, PROCESS, START and END.
5788 If the region is more than 500 characters long,
5789 it is sent in several bunches. This may happen even for shorter regions.
5790 Output from processes can arrive in between bunches. */)
5791 (process
, start
, end
)
5792 Lisp_Object process
, start
, end
;
5796 proc
= get_process (process
);
5797 validate_region (&start
, &end
);
5798 send_process_object (proc
, start
, end
);
5802 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5804 doc
: /* Send PROCESS the contents of STRING as input.
5805 PROCESS may be a process, a buffer, the name of a process or buffer, or
5806 nil, indicating the current buffer's process.
5807 If STRING is more than 500 characters long,
5808 it is sent in several bunches. This may happen even for shorter strings.
5809 Output from processes can arrive in between bunches. */)
5811 Lisp_Object process
, string
;
5814 CHECK_STRING (string
);
5815 proc
= get_process (process
);
5816 send_process_object (proc
, string
, Qnil
);
5820 /* Return the foreground process group for the tty/pty that
5821 the process P uses. */
5823 emacs_get_tty_pgrp (p
)
5824 struct Lisp_Process
*p
;
5829 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5832 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5833 master side. Try the slave side. */
5834 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5838 ioctl (fd
, TIOCGPGRP
, &gid
);
5842 #endif /* defined (TIOCGPGRP ) */
5847 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5848 Sprocess_running_child_p
, 0, 1, 0,
5849 doc
: /* Return t if PROCESS has given the terminal to a child.
5850 If the operating system does not make it possible to find out,
5851 return t unconditionally. */)
5853 Lisp_Object process
;
5855 /* Initialize in case ioctl doesn't exist or gives an error,
5856 in a way that will cause returning t. */
5859 struct Lisp_Process
*p
;
5861 proc
= get_process (process
);
5862 p
= XPROCESS (proc
);
5864 if (!EQ (p
->childp
, Qt
))
5865 error ("Process %s is not a subprocess",
5868 error ("Process %s is not active",
5871 gid
= emacs_get_tty_pgrp (p
);
5878 /* send a signal number SIGNO to PROCESS.
5879 If CURRENT_GROUP is t, that means send to the process group
5880 that currently owns the terminal being used to communicate with PROCESS.
5881 This is used for various commands in shell mode.
5882 If CURRENT_GROUP is lambda, that means send to the process group
5883 that currently owns the terminal, but only if it is NOT the shell itself.
5885 If NOMSG is zero, insert signal-announcements into process's buffers
5888 If we can, we try to signal PROCESS by sending control characters
5889 down the pty. This allows us to signal inferiors who have changed
5890 their uid, for which killpg would return an EPERM error. */
5893 process_send_signal (process
, signo
, current_group
, nomsg
)
5894 Lisp_Object process
;
5896 Lisp_Object current_group
;
5900 register struct Lisp_Process
*p
;
5904 proc
= get_process (process
);
5905 p
= XPROCESS (proc
);
5907 if (!EQ (p
->childp
, Qt
))
5908 error ("Process %s is not a subprocess",
5911 error ("Process %s is not active",
5915 current_group
= Qnil
;
5917 /* If we are using pgrps, get a pgrp number and make it negative. */
5918 if (NILP (current_group
))
5919 /* Send the signal to the shell's process group. */
5923 #ifdef SIGNALS_VIA_CHARACTERS
5924 /* If possible, send signals to the entire pgrp
5925 by sending an input character to it. */
5927 /* TERMIOS is the latest and bestest, and seems most likely to
5928 work. If the system has it, use it. */
5931 cc_t
*sig_char
= NULL
;
5933 tcgetattr (p
->infd
, &t
);
5938 sig_char
= &t
.c_cc
[VINTR
];
5942 sig_char
= &t
.c_cc
[VQUIT
];
5946 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5947 sig_char
= &t
.c_cc
[VSWTCH
];
5949 sig_char
= &t
.c_cc
[VSUSP
];
5954 if (sig_char
&& *sig_char
!= CDISABLE
)
5956 send_process (proc
, sig_char
, 1, Qnil
);
5959 /* If we can't send the signal with a character,
5960 fall through and send it another way. */
5961 #else /* ! HAVE_TERMIOS */
5963 /* On Berkeley descendants, the following IOCTL's retrieve the
5964 current control characters. */
5965 #if defined (TIOCGLTC) && defined (TIOCGETC)
5973 ioctl (p
->infd
, TIOCGETC
, &c
);
5974 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5977 ioctl (p
->infd
, TIOCGETC
, &c
);
5978 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5982 ioctl (p
->infd
, TIOCGLTC
, &lc
);
5983 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5985 #endif /* ! defined (SIGTSTP) */
5988 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5990 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5997 ioctl (p
->infd
, TCGETA
, &t
);
5998 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
6001 ioctl (p
->infd
, TCGETA
, &t
);
6002 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
6006 ioctl (p
->infd
, TCGETA
, &t
);
6007 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
6009 #endif /* ! defined (SIGTSTP) */
6011 #else /* ! defined (TCGETA) */
6012 Your configuration files are messed up
.
6013 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
6014 you'd better be using one of the alternatives above! */
6015 #endif /* ! defined (TCGETA) */
6016 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6017 /* In this case, the code above should alway returns. */
6019 #endif /* ! defined HAVE_TERMIOS */
6021 /* The code above may fall through if it can't
6022 handle the signal. */
6023 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6026 /* Get the current pgrp using the tty itself, if we have that.
6027 Otherwise, use the pty to get the pgrp.
6028 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6029 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6030 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6031 His patch indicates that if TIOCGPGRP returns an error, then
6032 we should just assume that p->pid is also the process group id. */
6034 gid
= emacs_get_tty_pgrp (p
);
6037 /* If we can't get the information, assume
6038 the shell owns the tty. */
6041 /* It is not clear whether anything really can set GID to -1.
6042 Perhaps on some system one of those ioctls can or could do so.
6043 Or perhaps this is vestigial. */
6046 #else /* ! defined (TIOCGPGRP ) */
6047 /* Can't select pgrps on this system, so we know that
6048 the child itself heads the pgrp. */
6050 #endif /* ! defined (TIOCGPGRP ) */
6052 /* If current_group is lambda, and the shell owns the terminal,
6053 don't send any signal. */
6054 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6062 p
->raw_status_new
= 0;
6064 p
->tick
= ++process_tick
;
6066 status_notify (NULL
);
6068 #endif /* ! defined (SIGCONT) */
6071 send_process (proc
, "\003", 1, Qnil
); /* ^C */
6076 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
6081 sys$
forcex (&(p
->pid
), 0, 1);
6084 flush_pending_output (p
->infd
);
6088 /* If we don't have process groups, send the signal to the immediate
6089 subprocess. That isn't really right, but it's better than any
6090 obvious alternative. */
6093 kill (p
->pid
, signo
);
6097 /* gid may be a pid, or minus a pgrp's number */
6099 if (!NILP (current_group
))
6101 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6102 EMACS_KILLPG (gid
, signo
);
6109 #else /* ! defined (TIOCSIGSEND) */
6110 EMACS_KILLPG (gid
, signo
);
6111 #endif /* ! defined (TIOCSIGSEND) */
6114 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6115 doc
: /* Interrupt process PROCESS.
6116 PROCESS may be a process, a buffer, or the name of a process or buffer.
6117 No arg or nil means current buffer's process.
6118 Second arg CURRENT-GROUP non-nil means send signal to
6119 the current process-group of the process's controlling terminal
6120 rather than to the process's own process group.
6121 If the process is a shell, this means interrupt current subjob
6122 rather than the shell.
6124 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6125 don't send the signal. */)
6126 (process
, current_group
)
6127 Lisp_Object process
, current_group
;
6129 process_send_signal (process
, SIGINT
, current_group
, 0);
6133 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6134 doc
: /* Kill process PROCESS. May be process or name of one.
6135 See function `interrupt-process' for more details on usage. */)
6136 (process
, current_group
)
6137 Lisp_Object process
, current_group
;
6139 process_send_signal (process
, SIGKILL
, current_group
, 0);
6143 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6144 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6145 See function `interrupt-process' for more details on usage. */)
6146 (process
, current_group
)
6147 Lisp_Object process
, current_group
;
6149 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6153 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6154 doc
: /* Stop process PROCESS. May be process or name of one.
6155 See function `interrupt-process' for more details on usage.
6156 If PROCESS is a network process, inhibit handling of incoming traffic. */)
6157 (process
, current_group
)
6158 Lisp_Object process
, current_group
;
6161 if (PROCESSP (process
) && NETCONN_P (process
))
6163 struct Lisp_Process
*p
;
6165 p
= XPROCESS (process
);
6166 if (NILP (p
->command
)
6169 FD_CLR (p
->infd
, &input_wait_mask
);
6170 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6177 error ("No SIGTSTP support");
6179 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6184 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6185 doc
: /* Continue process PROCESS. May be process or name of one.
6186 See function `interrupt-process' for more details on usage.
6187 If PROCESS is a network process, resume handling of incoming traffic. */)
6188 (process
, current_group
)
6189 Lisp_Object process
, current_group
;
6192 if (PROCESSP (process
) && NETCONN_P (process
))
6194 struct Lisp_Process
*p
;
6196 p
= XPROCESS (process
);
6197 if (EQ (p
->command
, Qt
)
6199 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6201 FD_SET (p
->infd
, &input_wait_mask
);
6202 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6209 process_send_signal (process
, SIGCONT
, current_group
, 0);
6211 error ("No SIGCONT support");
6216 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6217 2, 2, "sProcess (name or number): \nnSignal code: ",
6218 doc
: /* Send PROCESS the signal with code SIGCODE.
6219 PROCESS may also be a number specifying the process id of the
6220 process to signal; in this case, the process need not be a child of
6222 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6224 Lisp_Object process
, sigcode
;
6228 if (INTEGERP (process
))
6230 pid
= XINT (process
);
6234 if (FLOATP (process
))
6236 pid
= (pid_t
) XFLOAT_DATA (process
);
6240 if (STRINGP (process
))
6243 if (tem
= Fget_process (process
), NILP (tem
))
6245 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6252 process
= get_process (process
);
6257 CHECK_PROCESS (process
);
6258 pid
= XPROCESS (process
)->pid
;
6260 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6264 #define parse_signal(NAME, VALUE) \
6265 else if (!xstricmp (name, NAME)) \
6266 XSETINT (sigcode, VALUE)
6268 if (INTEGERP (sigcode
))
6272 unsigned char *name
;
6274 CHECK_SYMBOL (sigcode
);
6275 name
= SDATA (SYMBOL_NAME (sigcode
));
6277 if (!strncmp(name
, "SIG", 3) || !strncmp(name
, "sig", 3))
6283 parse_signal ("usr1", SIGUSR1
);
6286 parse_signal ("usr2", SIGUSR2
);
6289 parse_signal ("term", SIGTERM
);
6292 parse_signal ("hup", SIGHUP
);
6295 parse_signal ("int", SIGINT
);
6298 parse_signal ("quit", SIGQUIT
);
6301 parse_signal ("ill", SIGILL
);
6304 parse_signal ("abrt", SIGABRT
);
6307 parse_signal ("emt", SIGEMT
);
6310 parse_signal ("kill", SIGKILL
);
6313 parse_signal ("fpe", SIGFPE
);
6316 parse_signal ("bus", SIGBUS
);
6319 parse_signal ("segv", SIGSEGV
);
6322 parse_signal ("sys", SIGSYS
);
6325 parse_signal ("pipe", SIGPIPE
);
6328 parse_signal ("alrm", SIGALRM
);
6331 parse_signal ("urg", SIGURG
);
6334 parse_signal ("stop", SIGSTOP
);
6337 parse_signal ("tstp", SIGTSTP
);
6340 parse_signal ("cont", SIGCONT
);
6343 parse_signal ("chld", SIGCHLD
);
6346 parse_signal ("ttin", SIGTTIN
);
6349 parse_signal ("ttou", SIGTTOU
);
6352 parse_signal ("io", SIGIO
);
6355 parse_signal ("xcpu", SIGXCPU
);
6358 parse_signal ("xfsz", SIGXFSZ
);
6361 parse_signal ("vtalrm", SIGVTALRM
);
6364 parse_signal ("prof", SIGPROF
);
6367 parse_signal ("winch", SIGWINCH
);
6370 parse_signal ("info", SIGINFO
);
6373 error ("Undefined signal name %s", name
);
6378 return make_number (kill (pid
, XINT (sigcode
)));
6381 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6382 doc
: /* Make PROCESS see end-of-file in its input.
6383 EOF comes after any text already sent to it.
6384 PROCESS may be a process, a buffer, the name of a process or buffer, or
6385 nil, indicating the current buffer's process.
6386 If PROCESS is a network connection, or is a process communicating
6387 through a pipe (as opposed to a pty), then you cannot send any more
6388 text to PROCESS after you call this function. */)
6390 Lisp_Object process
;
6393 struct coding_system
*coding
;
6395 if (DATAGRAM_CONN_P (process
))
6398 proc
= get_process (process
);
6399 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6401 /* Make sure the process is really alive. */
6402 if (XPROCESS (proc
)->raw_status_new
)
6403 update_status (XPROCESS (proc
));
6404 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6405 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6407 if (CODING_REQUIRE_FLUSHING (coding
))
6409 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6410 send_process (proc
, "", 0, Qnil
);
6414 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6416 if (XPROCESS (proc
)->pty_flag
)
6417 send_process (proc
, "\004", 1, Qnil
);
6420 int old_outfd
, new_outfd
;
6422 #ifdef HAVE_SHUTDOWN
6423 /* If this is a network connection, or socketpair is used
6424 for communication with the subprocess, call shutdown to cause EOF.
6425 (In some old system, shutdown to socketpair doesn't work.
6426 Then we just can't win.) */
6427 if (XPROCESS (proc
)->pid
== 0
6428 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6429 shutdown (XPROCESS (proc
)->outfd
, 1);
6430 /* In case of socketpair, outfd == infd, so don't close it. */
6431 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6432 emacs_close (XPROCESS (proc
)->outfd
);
6433 #else /* not HAVE_SHUTDOWN */
6434 emacs_close (XPROCESS (proc
)->outfd
);
6435 #endif /* not HAVE_SHUTDOWN */
6436 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6439 old_outfd
= XPROCESS (proc
)->outfd
;
6441 if (!proc_encode_coding_system
[new_outfd
])
6442 proc_encode_coding_system
[new_outfd
]
6443 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6444 bcopy (proc_encode_coding_system
[old_outfd
],
6445 proc_encode_coding_system
[new_outfd
],
6446 sizeof (struct coding_system
));
6447 bzero (proc_encode_coding_system
[old_outfd
],
6448 sizeof (struct coding_system
));
6450 XPROCESS (proc
)->outfd
= new_outfd
;
6456 /* Kill all processes associated with `buffer'.
6457 If `buffer' is nil, kill all processes */
6460 kill_buffer_processes (buffer
)
6463 Lisp_Object tail
, proc
;
6465 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6467 proc
= XCDR (XCAR (tail
));
6468 if (GC_PROCESSP (proc
)
6469 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6471 if (NETCONN_P (proc
))
6472 Fdelete_process (proc
);
6473 else if (XPROCESS (proc
)->infd
>= 0)
6474 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6479 /* On receipt of a signal that a child status has changed, loop asking
6480 about children with changed statuses until the system says there
6483 All we do is change the status; we do not run sentinels or print
6484 notifications. That is saved for the next time keyboard input is
6485 done, in order to avoid timing errors.
6487 ** WARNING: this can be called during garbage collection.
6488 Therefore, it must not be fooled by the presence of mark bits in
6491 ** USG WARNING: Although it is not obvious from the documentation
6492 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6493 signal() before executing at least one wait(), otherwise the
6494 handler will be called again, resulting in an infinite loop. The
6495 relevant portion of the documentation reads "SIGCLD signals will be
6496 queued and the signal-catching function will be continually
6497 reentered until the queue is empty". Invoking signal() causes the
6498 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6501 ** Malloc WARNING: This should never call malloc either directly or
6502 indirectly; if it does, that is a bug */
6506 sigchld_handler (signo
)
6509 int old_errno
= errno
;
6511 register struct Lisp_Process
*p
;
6512 extern EMACS_TIME
*input_available_clear_time
;
6514 SIGNAL_THREAD_CHECK (signo
);
6518 sigheld
|= sigbit (SIGCHLD
);
6530 #endif /* no WUNTRACED */
6531 /* Keep trying to get a status until we get a definitive result. */
6535 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6537 while (pid
< 0 && errno
== EINTR
);
6541 /* PID == 0 means no processes found, PID == -1 means a real
6542 failure. We have done all our job, so return. */
6544 /* USG systems forget handlers when they are used;
6545 must reestablish each time */
6546 #if defined (USG) && !defined (POSIX_SIGNALS)
6547 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6550 sigheld
&= ~sigbit (SIGCHLD
);
6558 #endif /* no WNOHANG */
6560 /* Find the process that signaled us, and record its status. */
6562 /* The process can have been deleted by Fdelete_process. */
6563 for (tail
= deleted_pid_list
; GC_CONSP (tail
); tail
= XCDR (tail
))
6565 Lisp_Object xpid
= XCAR (tail
);
6566 if ((GC_INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6567 || (GC_FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6569 XSETCAR (tail
, Qnil
);
6570 goto sigchld_end_of_loop
;
6574 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6576 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6578 proc
= XCDR (XCAR (tail
));
6579 p
= XPROCESS (proc
);
6580 if (GC_EQ (p
->childp
, Qt
) && p
->pid
== pid
)
6585 /* Look for an asynchronous process whose pid hasn't been filled
6588 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6590 proc
= XCDR (XCAR (tail
));
6591 p
= XPROCESS (proc
);
6597 /* Change the status of the process that was found. */
6600 union { int i
; WAITTYPE wt
; } u
;
6601 int clear_desc_flag
= 0;
6603 p
->tick
= ++process_tick
;
6605 p
->raw_status
= u
.i
;
6606 p
->raw_status_new
= 1;
6608 /* If process has terminated, stop waiting for its output. */
6609 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6611 clear_desc_flag
= 1;
6613 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6614 if (clear_desc_flag
)
6616 FD_CLR (p
->infd
, &input_wait_mask
);
6617 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6620 /* Tell wait_reading_process_output that it needs to wake up and
6622 if (input_available_clear_time
)
6623 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6626 /* There was no asynchronous process found for that pid: we have
6627 a synchronous process. */
6630 synch_process_alive
= 0;
6632 /* Report the status of the synchronous process. */
6634 synch_process_retcode
= WRETCODE (w
);
6635 else if (WIFSIGNALED (w
))
6636 synch_process_termsig
= WTERMSIG (w
);
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 sigchld_end_of_loop
:
6647 /* On some systems, we must return right away.
6648 If any more processes want to signal us, we will
6650 Otherwise (on systems that have WNOHANG), loop around
6651 to use up all the processes that have something to tell us. */
6652 #if (defined WINDOWSNT \
6653 || (defined USG && !defined GNU_LINUX \
6654 && !(defined HPUX && defined WNOHANG)))
6655 #if defined (USG) && ! defined (POSIX_SIGNALS)
6656 signal (signo
, sigchld_handler
);
6660 #endif /* USG, but not HPUX with WNOHANG */
6663 #endif /* SIGCHLD */
6667 exec_sentinel_unwind (data
)
6670 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6675 exec_sentinel_error_handler (error
)
6678 cmd_error_internal (error
, "error in process sentinel: ");
6680 update_echo_area ();
6681 Fsleep_for (make_number (2), Qnil
);
6686 exec_sentinel (proc
, reason
)
6687 Lisp_Object proc
, reason
;
6689 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6690 register struct Lisp_Process
*p
= XPROCESS (proc
);
6691 int count
= SPECPDL_INDEX ();
6692 int outer_running_asynch_code
= running_asynch_code
;
6693 int waiting
= waiting_for_user_input_p
;
6695 if (inhibit_sentinels
)
6698 /* No need to gcpro these, because all we do with them later
6699 is test them for EQness, and none of them should be a string. */
6700 odeactivate
= Vdeactivate_mark
;
6701 XSETBUFFER (obuffer
, current_buffer
);
6702 okeymap
= current_buffer
->keymap
;
6704 sentinel
= p
->sentinel
;
6705 if (NILP (sentinel
))
6708 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6709 assure that it gets restored no matter how the sentinel exits. */
6711 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6712 /* Inhibit quit so that random quits don't screw up a running filter. */
6713 specbind (Qinhibit_quit
, Qt
);
6714 specbind (Qlast_nonmenu_event
, Qt
);
6716 /* In case we get recursively called,
6717 and we already saved the match data nonrecursively,
6718 save the same match data in safely recursive fashion. */
6719 if (outer_running_asynch_code
)
6722 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6723 restore_search_regs ();
6724 record_unwind_save_match_data ();
6725 Fset_match_data (tem
, Qt
);
6728 /* For speed, if a search happens within this code,
6729 save the match data in a special nonrecursive fashion. */
6730 running_asynch_code
= 1;
6732 internal_condition_case_1 (read_process_output_call
,
6734 Fcons (proc
, Fcons (reason
, Qnil
))),
6735 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6736 exec_sentinel_error_handler
);
6738 /* If we saved the match data nonrecursively, restore it now. */
6739 restore_search_regs ();
6740 running_asynch_code
= outer_running_asynch_code
;
6742 Vdeactivate_mark
= odeactivate
;
6744 /* Restore waiting_for_user_input_p as it was
6745 when we were called, in case the filter clobbered it. */
6746 waiting_for_user_input_p
= waiting
;
6749 if (! EQ (Fcurrent_buffer (), obuffer
)
6750 || ! EQ (current_buffer
->keymap
, okeymap
))
6752 /* But do it only if the caller is actually going to read events.
6753 Otherwise there's no need to make him wake up, and it could
6754 cause trouble (for example it would make sit_for return). */
6755 if (waiting_for_user_input_p
== -1)
6756 record_asynch_buffer_change ();
6758 unbind_to (count
, Qnil
);
6761 /* Report all recent events of a change in process status
6762 (either run the sentinel or output a message).
6763 This is usually done while Emacs is waiting for keyboard input
6764 but can be done at other times. */
6767 status_notify (deleting_process
)
6768 struct Lisp_Process
*deleting_process
;
6770 register Lisp_Object proc
, buffer
;
6771 Lisp_Object tail
, msg
;
6772 struct gcpro gcpro1
, gcpro2
;
6776 /* We need to gcpro tail; if read_process_output calls a filter
6777 which deletes a process and removes the cons to which tail points
6778 from Vprocess_alist, and then causes a GC, tail is an unprotected
6782 /* Set this now, so that if new processes are created by sentinels
6783 that we run, we get called again to handle their status changes. */
6784 update_tick
= process_tick
;
6786 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6789 register struct Lisp_Process
*p
;
6791 proc
= Fcdr (Fcar (tail
));
6792 p
= XPROCESS (proc
);
6794 if (p
->tick
!= p
->update_tick
)
6796 p
->update_tick
= p
->tick
;
6798 /* If process is still active, read any output that remains. */
6799 while (! EQ (p
->filter
, Qt
)
6800 && ! EQ (p
->status
, Qconnect
)
6801 && ! EQ (p
->status
, Qlisten
)
6802 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6804 && p
!= deleting_process
6805 && read_process_output (proc
, p
->infd
) > 0);
6809 /* Get the text to use for the message. */
6810 if (p
->raw_status_new
)
6812 msg
= status_message (p
);
6814 /* If process is terminated, deactivate it or delete it. */
6816 if (CONSP (p
->status
))
6817 symbol
= XCAR (p
->status
);
6819 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6820 || EQ (symbol
, Qclosed
))
6822 if (delete_exited_processes
)
6823 remove_process (proc
);
6825 deactivate_process (proc
);
6828 /* The actions above may have further incremented p->tick.
6829 So set p->update_tick again
6830 so that an error in the sentinel will not cause
6831 this code to be run again. */
6832 p
->update_tick
= p
->tick
;
6833 /* Now output the message suitably. */
6834 if (!NILP (p
->sentinel
))
6835 exec_sentinel (proc
, msg
);
6836 /* Don't bother with a message in the buffer
6837 when a process becomes runnable. */
6838 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6840 Lisp_Object ro
, tem
;
6841 struct buffer
*old
= current_buffer
;
6842 int opoint
, opoint_byte
;
6843 int before
, before_byte
;
6845 ro
= XBUFFER (buffer
)->read_only
;
6847 /* Avoid error if buffer is deleted
6848 (probably that's why the process is dead, too) */
6849 if (NILP (XBUFFER (buffer
)->name
))
6851 Fset_buffer (buffer
);
6854 opoint_byte
= PT_BYTE
;
6855 /* Insert new output into buffer
6856 at the current end-of-output marker,
6857 thus preserving logical ordering of input and output. */
6858 if (XMARKER (p
->mark
)->buffer
)
6859 Fgoto_char (p
->mark
);
6861 SET_PT_BOTH (ZV
, ZV_BYTE
);
6864 before_byte
= PT_BYTE
;
6866 tem
= current_buffer
->read_only
;
6867 current_buffer
->read_only
= Qnil
;
6868 insert_string ("\nProcess ");
6869 Finsert (1, &p
->name
);
6870 insert_string (" ");
6872 current_buffer
->read_only
= tem
;
6873 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6875 if (opoint
>= before
)
6876 SET_PT_BOTH (opoint
+ (PT
- before
),
6877 opoint_byte
+ (PT_BYTE
- before_byte
));
6879 SET_PT_BOTH (opoint
, opoint_byte
);
6881 set_buffer_internal (old
);
6886 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6887 redisplay_preserve_echo_area (13);
6893 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6894 Sset_process_coding_system
, 1, 3, 0,
6895 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6896 DECODING will be used to decode subprocess output and ENCODING to
6897 encode subprocess input. */)
6898 (process
, decoding
, encoding
)
6899 register Lisp_Object process
, decoding
, encoding
;
6901 register struct Lisp_Process
*p
;
6903 CHECK_PROCESS (process
);
6904 p
= XPROCESS (process
);
6906 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6908 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6909 Fcheck_coding_system (decoding
);
6910 Fcheck_coding_system (encoding
);
6912 p
->decode_coding_system
= decoding
;
6913 p
->encode_coding_system
= encoding
;
6914 setup_process_coding_systems (process
);
6919 DEFUN ("process-coding-system",
6920 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6921 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6923 register Lisp_Object process
;
6925 CHECK_PROCESS (process
);
6926 return Fcons (XPROCESS (process
)->decode_coding_system
,
6927 XPROCESS (process
)->encode_coding_system
);
6930 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6931 Sset_process_filter_multibyte
, 2, 2, 0,
6932 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6933 If FLAG is non-nil, the filter is given multibyte strings.
6934 If FLAG is nil, the filter is given unibyte strings. In this case,
6935 all character code conversion except for end-of-line conversion is
6938 Lisp_Object process
, flag
;
6940 register struct Lisp_Process
*p
;
6942 CHECK_PROCESS (process
);
6943 p
= XPROCESS (process
);
6944 p
->filter_multibyte
= !NILP (flag
);
6945 setup_process_coding_systems (process
);
6950 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6951 Sprocess_filter_multibyte_p
, 1, 1, 0,
6952 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6954 Lisp_Object process
;
6956 register struct Lisp_Process
*p
;
6958 CHECK_PROCESS (process
);
6959 p
= XPROCESS (process
);
6961 return (p
->filter_multibyte
? Qt
: Qnil
);
6966 /* Add DESC to the set of keyboard input descriptors. */
6969 add_keyboard_wait_descriptor (desc
)
6972 FD_SET (desc
, &input_wait_mask
);
6973 FD_SET (desc
, &non_process_wait_mask
);
6974 if (desc
> max_keyboard_desc
)
6975 max_keyboard_desc
= desc
;
6978 static int add_gpm_wait_descriptor_called_flag
;
6981 add_gpm_wait_descriptor (desc
)
6984 if (! add_gpm_wait_descriptor_called_flag
)
6985 FD_CLR (0, &input_wait_mask
);
6986 add_gpm_wait_descriptor_called_flag
= 1;
6987 FD_SET (desc
, &input_wait_mask
);
6988 FD_SET (desc
, &gpm_wait_mask
);
6989 if (desc
> max_gpm_desc
)
6990 max_gpm_desc
= desc
;
6993 /* From now on, do not expect DESC to give keyboard input. */
6996 delete_keyboard_wait_descriptor (desc
)
7000 int lim
= max_keyboard_desc
;
7002 FD_CLR (desc
, &input_wait_mask
);
7003 FD_CLR (desc
, &non_process_wait_mask
);
7005 if (desc
== max_keyboard_desc
)
7006 for (fd
= 0; fd
< lim
; fd
++)
7007 if (FD_ISSET (fd
, &input_wait_mask
)
7008 && !FD_ISSET (fd
, &non_keyboard_wait_mask
)
7009 && !FD_ISSET (fd
, &gpm_wait_mask
))
7010 max_keyboard_desc
= fd
;
7014 delete_gpm_wait_descriptor (desc
)
7018 int lim
= max_gpm_desc
;
7020 FD_CLR (desc
, &input_wait_mask
);
7021 FD_CLR (desc
, &non_process_wait_mask
);
7023 if (desc
== max_gpm_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
, &non_process_wait_mask
))
7031 /* Return nonzero if *MASK has a bit set
7032 that corresponds to one of the keyboard input descriptors. */
7035 keyboard_bit_set (mask
)
7040 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
7041 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7042 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7053 inhibit_sentinels
= 0;
7057 if (! noninteractive
|| initialized
)
7059 signal (SIGCHLD
, sigchld_handler
);
7062 FD_ZERO (&input_wait_mask
);
7063 FD_ZERO (&non_keyboard_wait_mask
);
7064 FD_ZERO (&non_process_wait_mask
);
7065 max_process_desc
= 0;
7067 #ifdef NON_BLOCKING_CONNECT
7068 FD_ZERO (&connect_wait_mask
);
7069 num_pending_connects
= 0;
7072 #ifdef ADAPTIVE_READ_BUFFERING
7073 process_output_delay_count
= 0;
7074 process_output_skip
= 0;
7077 /* Don't do this, it caused infinite select loops. The display
7078 method should call add_keyboard_wait_descriptor on stdin if it
7081 FD_SET (0, &input_wait_mask
);
7084 Vprocess_alist
= Qnil
;
7086 deleted_pid_list
= Qnil
;
7088 for (i
= 0; i
< MAXDESC
; i
++)
7090 chan_process
[i
] = Qnil
;
7091 proc_buffered_char
[i
] = -1;
7093 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
7094 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
7095 #ifdef DATAGRAM_SOCKETS
7096 bzero (datagram_address
, sizeof datagram_address
);
7101 Lisp_Object subfeatures
= Qnil
;
7102 struct socket_options
*sopt
;
7104 #define ADD_SUBFEATURE(key, val) \
7105 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
7107 #ifdef NON_BLOCKING_CONNECT
7108 ADD_SUBFEATURE (QCnowait
, Qt
);
7110 #ifdef DATAGRAM_SOCKETS
7111 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7113 #ifdef HAVE_LOCAL_SOCKETS
7114 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7116 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7118 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7120 #ifdef HAVE_GETSOCKNAME
7121 ADD_SUBFEATURE (QCservice
, Qt
);
7123 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
7124 ADD_SUBFEATURE (QCserver
, Qt
);
7127 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7128 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
7130 Fprovide (intern ("make-network-process"), subfeatures
);
7132 #endif /* HAVE_SOCKETS */
7134 #if defined (DARWIN) || defined (MAC_OSX)
7135 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7136 processes. As such, we only change the default value. */
7139 char *release
= get_operating_system_release();
7140 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7141 && release
[1] == '.')) {
7142 Vprocess_connection_type
= Qnil
;
7151 Qprocessp
= intern ("processp");
7152 staticpro (&Qprocessp
);
7153 Qrun
= intern ("run");
7155 Qstop
= intern ("stop");
7157 Qsignal
= intern ("signal");
7158 staticpro (&Qsignal
);
7160 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7163 Qexit = intern ("exit");
7164 staticpro (&Qexit); */
7166 Qopen
= intern ("open");
7168 Qclosed
= intern ("closed");
7169 staticpro (&Qclosed
);
7170 Qconnect
= intern ("connect");
7171 staticpro (&Qconnect
);
7172 Qfailed
= intern ("failed");
7173 staticpro (&Qfailed
);
7174 Qlisten
= intern ("listen");
7175 staticpro (&Qlisten
);
7176 Qlocal
= intern ("local");
7177 staticpro (&Qlocal
);
7178 Qipv4
= intern ("ipv4");
7181 Qipv6
= intern ("ipv6");
7184 Qdatagram
= intern ("datagram");
7185 staticpro (&Qdatagram
);
7187 QCname
= intern (":name");
7188 staticpro (&QCname
);
7189 QCbuffer
= intern (":buffer");
7190 staticpro (&QCbuffer
);
7191 QChost
= intern (":host");
7192 staticpro (&QChost
);
7193 QCservice
= intern (":service");
7194 staticpro (&QCservice
);
7195 QCtype
= intern (":type");
7196 staticpro (&QCtype
);
7197 QClocal
= intern (":local");
7198 staticpro (&QClocal
);
7199 QCremote
= intern (":remote");
7200 staticpro (&QCremote
);
7201 QCcoding
= intern (":coding");
7202 staticpro (&QCcoding
);
7203 QCserver
= intern (":server");
7204 staticpro (&QCserver
);
7205 QCnowait
= intern (":nowait");
7206 staticpro (&QCnowait
);
7207 QCsentinel
= intern (":sentinel");
7208 staticpro (&QCsentinel
);
7209 QClog
= intern (":log");
7211 QCnoquery
= intern (":noquery");
7212 staticpro (&QCnoquery
);
7213 QCstop
= intern (":stop");
7214 staticpro (&QCstop
);
7215 QCoptions
= intern (":options");
7216 staticpro (&QCoptions
);
7217 QCplist
= intern (":plist");
7218 staticpro (&QCplist
);
7219 QCfilter_multibyte
= intern (":filter-multibyte");
7220 staticpro (&QCfilter_multibyte
);
7222 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
7223 staticpro (&Qlast_nonmenu_event
);
7225 staticpro (&Vprocess_alist
);
7227 staticpro (&deleted_pid_list
);
7230 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
7231 doc
: /* *Non-nil means delete processes immediately when they exit.
7232 A value of nil means don't delete them until `list-processes' is run. */);
7234 delete_exited_processes
= 1;
7236 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
7237 doc
: /* Control type of device used to communicate with subprocesses.
7238 Values are nil to use a pipe, or t or `pty' to use a pty.
7239 The value has no effect if the system has no ptys or if all ptys are busy:
7240 then a pipe is used in any case.
7241 The value takes effect when `start-process' is called. */);
7242 Vprocess_connection_type
= Qt
;
7244 #ifdef ADAPTIVE_READ_BUFFERING
7245 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
7246 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7247 On some systems, when Emacs reads the output from a subprocess, the output data
7248 is read in very small blocks, potentially resulting in very poor performance.
7249 This behavior can be remedied to some extent by setting this variable to a
7250 non-nil value, as it will automatically delay reading from such processes, to
7251 allow them to produce more output before Emacs tries to read it.
7252 If the value is t, the delay is reset after each write to the process; any other
7253 non-nil value means that the delay is not reset on write.
7254 The variable takes effect when `start-process' is called. */);
7255 Vprocess_adaptive_read_buffering
= Qt
;
7258 defsubr (&Sprocessp
);
7259 defsubr (&Sget_process
);
7260 defsubr (&Sget_buffer_process
);
7261 defsubr (&Sdelete_process
);
7262 defsubr (&Sprocess_status
);
7263 defsubr (&Sprocess_exit_status
);
7264 defsubr (&Sprocess_id
);
7265 defsubr (&Sprocess_name
);
7266 defsubr (&Sprocess_tty_name
);
7267 defsubr (&Sprocess_command
);
7268 defsubr (&Sset_process_buffer
);
7269 defsubr (&Sprocess_buffer
);
7270 defsubr (&Sprocess_mark
);
7271 defsubr (&Sset_process_filter
);
7272 defsubr (&Sprocess_filter
);
7273 defsubr (&Sset_process_sentinel
);
7274 defsubr (&Sprocess_sentinel
);
7275 defsubr (&Sset_process_window_size
);
7276 defsubr (&Sset_process_inherit_coding_system_flag
);
7277 defsubr (&Sprocess_inherit_coding_system_flag
);
7278 defsubr (&Sset_process_query_on_exit_flag
);
7279 defsubr (&Sprocess_query_on_exit_flag
);
7280 defsubr (&Sprocess_contact
);
7281 defsubr (&Sprocess_plist
);
7282 defsubr (&Sset_process_plist
);
7283 defsubr (&Slist_processes
);
7284 defsubr (&Sprocess_list
);
7285 defsubr (&Sstart_process
);
7287 defsubr (&Sset_network_process_option
);
7288 defsubr (&Smake_network_process
);
7289 defsubr (&Sformat_network_address
);
7290 #endif /* HAVE_SOCKETS */
7291 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
7293 defsubr (&Snetwork_interface_list
);
7295 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7296 defsubr (&Snetwork_interface_info
);
7298 #endif /* HAVE_SOCKETS ... */
7299 #ifdef DATAGRAM_SOCKETS
7300 defsubr (&Sprocess_datagram_address
);
7301 defsubr (&Sset_process_datagram_address
);
7303 defsubr (&Saccept_process_output
);
7304 defsubr (&Sprocess_send_region
);
7305 defsubr (&Sprocess_send_string
);
7306 defsubr (&Sinterrupt_process
);
7307 defsubr (&Skill_process
);
7308 defsubr (&Squit_process
);
7309 defsubr (&Sstop_process
);
7310 defsubr (&Scontinue_process
);
7311 defsubr (&Sprocess_running_child_p
);
7312 defsubr (&Sprocess_send_eof
);
7313 defsubr (&Ssignal_process
);
7314 defsubr (&Swaiting_for_user_input_p
);
7315 /* defsubr (&Sprocess_connection); */
7316 defsubr (&Sset_process_coding_system
);
7317 defsubr (&Sprocess_coding_system
);
7318 defsubr (&Sset_process_filter_multibyte
);
7319 defsubr (&Sprocess_filter_multibyte_p
);
7323 #else /* not subprocesses */
7325 #include <sys/types.h>
7329 #include "systime.h"
7330 #include "charset.h"
7332 #include "termopts.h"
7333 #include "sysselect.h"
7335 extern int frame_garbaged
;
7337 extern EMACS_TIME
timer_check ();
7338 extern int timers_run
;
7342 /* As described above, except assuming that there are no subprocesses:
7344 Wait for timeout to elapse and/or keyboard input to be available.
7347 timeout in seconds, or
7348 zero for no limit, or
7349 -1 means gobble data immediately available but don't wait for any.
7351 read_kbd is a Lisp_Object:
7352 0 to ignore keyboard input, or
7353 1 to return when input is available, or
7354 -1 means caller will actually read the input, so don't throw to
7357 see full version for other parameters. We know that wait_proc will
7358 always be NULL, since `subprocesses' isn't defined.
7360 do_display != 0 means redisplay should be done to show subprocess
7361 output that arrives.
7363 Return true if we received input from any process. */
7366 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
7367 wait_for_cell
, wait_proc
, just_wait_proc
)
7368 int time_limit
, microsecs
, read_kbd
, do_display
;
7369 Lisp_Object wait_for_cell
;
7370 struct Lisp_Process
*wait_proc
;
7374 EMACS_TIME end_time
, timeout
;
7375 SELECT_TYPE waitchannels
;
7378 /* What does time_limit really mean? */
7379 if (time_limit
|| microsecs
)
7381 EMACS_GET_TIME (end_time
);
7382 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
7383 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
7386 /* Turn off periodic alarms (in case they are in use)
7387 and then turn off any other atimers,
7388 because the select emulator uses alarms. */
7390 turn_on_atimers (0);
7394 int timeout_reduced_for_timers
= 0;
7396 /* If calling from keyboard input, do not quit
7397 since we want to return C-g as an input character.
7398 Otherwise, do pending quit if requested. */
7402 /* Exit now if the cell we're waiting for became non-nil. */
7403 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7406 /* Compute time from now till when time limit is up */
7407 /* Exit if already run out */
7408 if (time_limit
== -1)
7410 /* -1 specified for timeout means
7411 gobble output available now
7412 but don't wait at all. */
7414 EMACS_SET_SECS_USECS (timeout
, 0, 0);
7416 else if (time_limit
|| microsecs
)
7418 EMACS_GET_TIME (timeout
);
7419 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
7420 if (EMACS_TIME_NEG_P (timeout
))
7425 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7428 /* If our caller will not immediately handle keyboard events,
7429 run timer events directly.
7430 (Callers that will immediately read keyboard events
7431 call timer_delay on their own.) */
7432 if (NILP (wait_for_cell
))
7434 EMACS_TIME timer_delay
;
7438 int old_timers_run
= timers_run
;
7439 timer_delay
= timer_check (1);
7440 if (timers_run
!= old_timers_run
&& do_display
)
7441 /* We must retry, since a timer may have requeued itself
7442 and that could alter the time delay. */
7443 redisplay_preserve_echo_area (14);
7447 while (!detect_input_pending ());
7449 /* If there is unread keyboard input, also return. */
7451 && requeued_events_pending_p ())
7454 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7456 EMACS_TIME difference
;
7457 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7458 if (EMACS_TIME_NEG_P (difference
))
7460 timeout
= timer_delay
;
7461 timeout_reduced_for_timers
= 1;
7466 /* Cause C-g and alarm signals to take immediate action,
7467 and cause input available signals to zero out timeout. */
7469 set_waiting_for_input (&timeout
);
7471 /* Wait till there is something to do. */
7473 if (! read_kbd
&& NILP (wait_for_cell
))
7474 FD_ZERO (&waitchannels
);
7476 FD_SET (0, &waitchannels
);
7478 /* If a frame has been newly mapped and needs updating,
7479 reprocess its display stuff. */
7480 if (frame_garbaged
&& do_display
)
7482 clear_waiting_for_input ();
7483 redisplay_preserve_echo_area (15);
7485 set_waiting_for_input (&timeout
);
7488 if (read_kbd
&& detect_input_pending ())
7491 FD_ZERO (&waitchannels
);
7494 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7499 /* Make C-g and alarm signals set flags again */
7500 clear_waiting_for_input ();
7502 /* If we woke up due to SIGWINCH, actually change size now. */
7503 do_pending_window_change (0);
7505 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7506 /* We waited the full specified time, so return now. */
7511 /* If the system call was interrupted, then go around the
7513 if (xerrno
== EINTR
)
7514 FD_ZERO (&waitchannels
);
7516 error ("select error: %s", emacs_strerror (xerrno
));
7519 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7520 /* System sometimes fails to deliver SIGIO. */
7521 kill (getpid (), SIGIO
);
7524 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7525 kill (getpid (), SIGIO
);
7528 /* Check for keyboard input */
7531 && detect_input_pending_run_timers (do_display
))
7533 swallow_events (do_display
);
7534 if (detect_input_pending_run_timers (do_display
))
7538 /* If there is unread keyboard input, also return. */
7540 && requeued_events_pending_p ())
7543 /* If wait_for_cell. check for keyboard input
7544 but don't run any timers.
7545 ??? (It seems wrong to me to check for keyboard
7546 input at all when wait_for_cell, but the code
7547 has been this way since July 1994.
7548 Try changing this after version 19.31.) */
7549 if (! NILP (wait_for_cell
)
7550 && detect_input_pending ())
7552 swallow_events (do_display
);
7553 if (detect_input_pending ())
7557 /* Exit now if the cell we're waiting for became non-nil. */
7558 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7568 /* Don't confuse make-docfile by having two doc strings for this function.
7569 make-docfile does not pay attention to #if, for good reason! */
7570 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7573 register Lisp_Object name
;
7578 /* Don't confuse make-docfile by having two doc strings for this function.
7579 make-docfile does not pay attention to #if, for good reason! */
7580 DEFUN ("process-inherit-coding-system-flag",
7581 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7585 register Lisp_Object process
;
7587 /* Ignore the argument and return the value of
7588 inherit-process-coding-system. */
7589 return inherit_process_coding_system
? Qt
: Qnil
;
7592 /* Kill all processes associated with `buffer'.
7593 If `buffer' is nil, kill all processes.
7594 Since we have no subprocesses, this does nothing. */
7597 kill_buffer_processes (buffer
)
7610 QCtype
= intern (":type");
7611 staticpro (&QCtype
);
7613 defsubr (&Sget_buffer_process
);
7614 defsubr (&Sprocess_inherit_coding_system_flag
);
7618 #endif /* not subprocesses */
7620 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7621 (do not change this comment) */