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 2, 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>
124 /* Disable IPv6 support for w32 until someone figures out how to do it
141 #include "termhooks.h"
142 #include "termopts.h"
143 #include "commands.h"
144 #include "keyboard.h"
146 #include "blockinput.h"
147 #include "dispextern.h"
148 #include "composite.h"
151 Lisp_Object Qprocessp
;
152 Lisp_Object Qrun
, Qstop
, Qsignal
;
153 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
154 Lisp_Object Qlocal
, Qipv4
, Qdatagram
;
158 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
159 Lisp_Object QClocal
, QCremote
, QCcoding
;
160 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
161 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
162 Lisp_Object QCfilter_multibyte
;
163 Lisp_Object Qlast_nonmenu_event
;
164 /* QCfamily is declared and initialized in xfaces.c,
165 QCfilter in keyboard.c. */
166 extern Lisp_Object QCfamily
, QCfilter
;
168 /* Qexit is declared and initialized in eval.c. */
170 /* QCfamily is defined in xfaces.c. */
171 extern Lisp_Object QCfamily
;
172 /* QCfilter is defined in keyboard.c. */
173 extern Lisp_Object QCfilter
;
175 /* a process object is a network connection when its childp field is neither
176 Qt nor Qnil but is instead a property list (KEY VAL ...). */
179 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
180 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
182 #define NETCONN_P(p) 0
183 #define NETCONN1_P(p) 0
184 #endif /* HAVE_SOCKETS */
186 /* Define first descriptor number available for subprocesses. */
188 #define FIRST_PROC_DESC 1
190 #define FIRST_PROC_DESC 3
193 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
196 #if !defined (SIGCHLD) && defined (SIGCLD)
197 #define SIGCHLD SIGCLD
200 #include "syssignal.h"
204 extern char *get_operating_system_release ();
210 extern char *sys_errlist
[];
217 /* t means use pty, nil means use a pipe,
218 maybe other values to come. */
219 static Lisp_Object Vprocess_connection_type
;
223 #include <sys/socket.h>
227 /* These next two vars are non-static since sysdep.c uses them in the
228 emulation of `select'. */
229 /* Number of events of change of status of a process. */
231 /* Number of events for which the user or sentinel has been notified. */
234 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
236 #ifdef BROKEN_NON_BLOCKING_CONNECT
237 #undef NON_BLOCKING_CONNECT
239 #ifndef NON_BLOCKING_CONNECT
242 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
243 #if defined (O_NONBLOCK) || defined (O_NDELAY)
244 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
245 #define NON_BLOCKING_CONNECT
246 #endif /* EWOULDBLOCK || EINPROGRESS */
247 #endif /* O_NONBLOCK || O_NDELAY */
248 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
249 #endif /* HAVE_SELECT */
250 #endif /* HAVE_SOCKETS */
251 #endif /* NON_BLOCKING_CONNECT */
252 #endif /* BROKEN_NON_BLOCKING_CONNECT */
254 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
255 this system. We need to read full packets, so we need a
256 "non-destructive" select. So we require either native select,
257 or emulation of select using FIONREAD. */
259 #ifdef BROKEN_DATAGRAM_SOCKETS
260 #undef DATAGRAM_SOCKETS
262 #ifndef DATAGRAM_SOCKETS
264 #if defined (HAVE_SELECT) || defined (FIONREAD)
265 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
266 #define DATAGRAM_SOCKETS
267 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
268 #endif /* HAVE_SELECT || FIONREAD */
269 #endif /* HAVE_SOCKETS */
270 #endif /* DATAGRAM_SOCKETS */
271 #endif /* BROKEN_DATAGRAM_SOCKETS */
274 #undef NON_BLOCKING_CONNECT
275 #undef DATAGRAM_SOCKETS
278 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
279 #ifdef EMACS_HAS_USECS
280 #define ADAPTIVE_READ_BUFFERING
284 #ifdef ADAPTIVE_READ_BUFFERING
285 #define READ_OUTPUT_DELAY_INCREMENT 10000
286 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
287 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
289 /* Number of processes which have a non-zero read_output_delay,
290 and therefore might be delayed for adaptive read buffering. */
292 static int process_output_delay_count
;
294 /* Non-zero if any process has non-nil read_output_skip. */
296 static int process_output_skip
;
298 /* Non-nil means to delay reading process output to improve buffering.
299 A value of t means that delay is reset after each send, any other
300 non-nil value does not reset the delay. A value of nil disables
301 adaptive read buffering completely. */
302 static Lisp_Object Vprocess_adaptive_read_buffering
;
304 #define process_output_delay_count 0
308 #include "sysselect.h"
310 static int keyboard_bit_set
P_ ((SELECT_TYPE
*));
311 static void deactivate_process
P_ ((Lisp_Object
));
312 static void status_notify
P_ ((struct Lisp_Process
*));
313 static int read_process_output
P_ ((Lisp_Object
, int));
315 /* If we support a window system, turn on the code to poll periodically
316 to detect C-g. It isn't actually used when doing interrupt input. */
317 #ifdef HAVE_WINDOW_SYSTEM
318 #define POLL_FOR_INPUT
321 static Lisp_Object
get_process ();
322 static void exec_sentinel ();
324 extern EMACS_TIME
timer_check ();
325 extern int timers_run
;
327 /* Mask of bits indicating the descriptors that we wait for input on. */
329 static SELECT_TYPE input_wait_mask
;
331 /* Mask that excludes keyboard input descriptor (s). */
333 static SELECT_TYPE non_keyboard_wait_mask
;
335 /* Mask that excludes process input descriptor (s). */
337 static SELECT_TYPE non_process_wait_mask
;
339 #ifdef NON_BLOCKING_CONNECT
340 /* Mask of bits indicating the descriptors that we wait for connect to
341 complete on. Once they complete, they are removed from this mask
342 and added to the input_wait_mask and non_keyboard_wait_mask. */
344 static SELECT_TYPE connect_wait_mask
;
346 /* Number of bits set in connect_wait_mask. */
347 static int num_pending_connects
;
349 #define IF_NON_BLOCKING_CONNECT(s) s
351 #define IF_NON_BLOCKING_CONNECT(s)
354 /* The largest descriptor currently in use for a process object. */
355 static int max_process_desc
;
357 /* The largest descriptor currently in use for keyboard input. */
358 static int max_keyboard_desc
;
360 /* Nonzero means delete a process right away if it exits. */
361 static int delete_exited_processes
;
363 /* Indexed by descriptor, gives the process (if any) for that descriptor */
364 Lisp_Object chan_process
[MAXDESC
];
366 /* Alist of elements (NAME . PROCESS) */
367 Lisp_Object Vprocess_alist
;
369 /* Buffered-ahead input char from process, indexed by channel.
370 -1 means empty (no char is buffered).
371 Used on sys V where the only way to tell if there is any
372 output from the process is to read at least one char.
373 Always -1 on systems that support FIONREAD. */
375 /* Don't make static; need to access externally. */
376 int proc_buffered_char
[MAXDESC
];
378 /* Table of `struct coding-system' for each process. */
379 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
380 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
382 #ifdef DATAGRAM_SOCKETS
383 /* Table of `partner address' for datagram sockets. */
384 struct sockaddr_and_len
{
387 } datagram_address
[MAXDESC
];
388 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
389 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
391 #define DATAGRAM_CHAN_P(chan) (0)
392 #define DATAGRAM_CONN_P(proc) (0)
395 /* Maximum number of bytes to send to a pty without an eof. */
396 static int pty_max_bytes
;
398 /* Nonzero means don't run process sentinels. This is used
400 int inhibit_sentinels
;
406 /* The file name of the pty opened by allocate_pty. */
408 static char pty_name
[24];
411 /* Compute the Lisp form of the process status, p->status, from
412 the numeric status that was returned by `wait'. */
414 static Lisp_Object
status_convert ();
418 struct Lisp_Process
*p
;
420 union { int i
; WAITTYPE wt
; } u
;
421 eassert (p
->raw_status_new
);
423 p
->status
= status_convert (u
.wt
);
424 p
->raw_status_new
= 0;
427 /* Convert a process status word in Unix format to
428 the list that we use internally. */
435 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
436 else if (WIFEXITED (w
))
437 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
438 WCOREDUMP (w
) ? Qt
: Qnil
));
439 else if (WIFSIGNALED (w
))
440 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
441 WCOREDUMP (w
) ? Qt
: Qnil
));
446 /* Given a status-list, extract the three pieces of information
447 and store them individually through the three pointers. */
450 decode_status (l
, symbol
, code
, coredump
)
468 *code
= XFASTINT (XCAR (tem
));
470 *coredump
= !NILP (tem
);
474 /* Return a string describing a process status list. */
478 struct Lisp_Process
*p
;
480 Lisp_Object status
= p
->status
;
483 Lisp_Object string
, string2
;
485 decode_status (status
, &symbol
, &code
, &coredump
);
487 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
490 synchronize_system_messages_locale ();
491 signame
= strsignal (code
);
494 string
= build_string (signame
);
495 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
496 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
497 return concat2 (string
, string2
);
499 else if (EQ (symbol
, Qexit
))
502 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
504 return build_string ("finished\n");
505 string
= Fnumber_to_string (make_number (code
));
506 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
507 return concat3 (build_string ("exited abnormally with code "),
510 else if (EQ (symbol
, Qfailed
))
512 string
= Fnumber_to_string (make_number (code
));
513 string2
= build_string ("\n");
514 return concat3 (build_string ("failed with code "),
518 return Fcopy_sequence (Fsymbol_name (symbol
));
523 /* Open an available pty, returning a file descriptor.
524 Return -1 on failure.
525 The file name of the terminal corresponding to the pty
526 is left in the variable pty_name. */
537 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
538 for (i
= 0; i
< 16; i
++)
541 struct stat stb
; /* Used in some PTY_OPEN. */
542 #ifdef PTY_NAME_SPRINTF
545 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
546 #endif /* no PTY_NAME_SPRINTF */
550 #else /* no PTY_OPEN */
553 /* Unusual IRIS code */
554 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
557 if (fstat (fd
, &stb
) < 0)
559 # else /* not IRIS */
560 { /* Some systems name their pseudoterminals so that there are gaps in
561 the usual sequence - for example, on HP9000/S700 systems, there
562 are no pseudoterminals with names ending in 'f'. So we wait for
563 three failures in a row before deciding that we've reached the
565 int failed_count
= 0;
567 if (stat (pty_name
, &stb
) < 0)
570 if (failed_count
>= 3)
577 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
579 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
581 # endif /* not IRIS */
583 #endif /* no PTY_OPEN */
587 /* check to make certain that both sides are available
588 this avoids a nasty yet stupid bug in rlogins */
589 #ifdef PTY_TTY_NAME_SPRINTF
592 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
593 #endif /* no PTY_TTY_NAME_SPRINTF */
595 if (access (pty_name
, 6) != 0)
598 # if !defined(IRIS) && !defined(__sgi)
604 #endif /* not UNIPLUS */
611 #endif /* HAVE_PTYS */
617 register Lisp_Object val
, tem
, name1
;
618 register struct Lisp_Process
*p
;
622 p
= allocate_process ();
624 XSETINT (p
->infd
, -1);
625 XSETINT (p
->outfd
, -1);
626 XSETFASTINT (p
->tick
, 0);
627 XSETFASTINT (p
->update_tick
, 0);
629 p
->raw_status_new
= 0;
631 p
->mark
= Fmake_marker ();
633 #ifdef ADAPTIVE_READ_BUFFERING
634 p
->adaptive_read_buffering
= Qnil
;
635 XSETFASTINT (p
->read_output_delay
, 0);
636 p
->read_output_skip
= Qnil
;
639 /* If name is already in use, modify it until it is unused. */
644 tem
= Fget_process (name1
);
645 if (NILP (tem
)) break;
646 sprintf (suffix
, "<%d>", i
);
647 name1
= concat2 (name
, build_string (suffix
));
651 XSETPROCESS (val
, p
);
652 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
657 remove_process (proc
)
658 register Lisp_Object proc
;
660 register Lisp_Object pair
;
662 pair
= Frassq (proc
, Vprocess_alist
);
663 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
665 deactivate_process (proc
);
668 /* Setup coding systems of PROCESS. */
671 setup_process_coding_systems (process
)
674 struct Lisp_Process
*p
= XPROCESS (process
);
675 int inch
= XINT (p
->infd
);
676 int outch
= XINT (p
->outfd
);
678 if (inch
< 0 || outch
< 0)
681 if (!proc_decode_coding_system
[inch
])
682 proc_decode_coding_system
[inch
]
683 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
684 setup_coding_system (p
->decode_coding_system
,
685 proc_decode_coding_system
[inch
]);
686 if (! NILP (p
->filter
))
688 if (NILP (p
->filter_multibyte
))
689 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
691 else if (BUFFERP (p
->buffer
))
693 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
694 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
697 if (!proc_encode_coding_system
[outch
])
698 proc_encode_coding_system
[outch
]
699 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
700 setup_coding_system (p
->encode_coding_system
,
701 proc_encode_coding_system
[outch
]);
702 if (proc_encode_coding_system
[outch
]->eol_type
== CODING_EOL_UNDECIDED
)
703 proc_encode_coding_system
[outch
]->eol_type
= system_eol_type
;
706 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
707 doc
: /* Return t if OBJECT is a process. */)
711 return PROCESSP (object
) ? Qt
: Qnil
;
714 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
715 doc
: /* Return the process named NAME, or nil if there is none. */)
717 register Lisp_Object name
;
722 return Fcdr (Fassoc (name
, Vprocess_alist
));
725 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
726 doc
: /* Return the (or a) process associated with BUFFER.
727 BUFFER may be a buffer or the name of one. */)
729 register Lisp_Object buffer
;
731 register Lisp_Object buf
, tail
, proc
;
733 if (NILP (buffer
)) return Qnil
;
734 buf
= Fget_buffer (buffer
);
735 if (NILP (buf
)) return Qnil
;
737 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
739 proc
= Fcdr (Fcar (tail
));
740 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
746 /* This is how commands for the user decode process arguments. It
747 accepts a process, a process name, a buffer, a buffer name, or nil.
748 Buffers denote the first process in the buffer, and nil denotes the
753 register Lisp_Object name
;
755 register Lisp_Object proc
, obj
;
758 obj
= Fget_process (name
);
760 obj
= Fget_buffer (name
);
762 error ("Process %s does not exist", SDATA (name
));
764 else if (NILP (name
))
765 obj
= Fcurrent_buffer ();
769 /* Now obj should be either a buffer object or a process object.
773 proc
= Fget_buffer_process (obj
);
775 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
787 /* Fdelete_process promises to immediately forget about the process, but in
788 reality, Emacs needs to remember those processes until they have been
789 treated by sigchld_handler; otherwise this handler would consider the
790 process as being synchronous and say that the synchronous process is
792 static Lisp_Object deleted_pid_list
;
795 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
796 doc
: /* Delete PROCESS: kill it and forget about it immediately.
797 PROCESS may be a process, a buffer, the name of a process or buffer, or
798 nil, indicating the current buffer's process. */)
800 register Lisp_Object process
;
802 register struct Lisp_Process
*p
;
804 process
= get_process (process
);
805 p
= XPROCESS (process
);
807 p
->raw_status_new
= 0;
810 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
811 XSETINT (p
->tick
, ++process_tick
);
814 else if (XINT (p
->infd
) >= 0)
818 /* Assignment to EMACS_INT stops GCC whining about limited range
820 EMACS_INT pid
= p
->pid
;
822 /* No problem storing the pid here, as it is still in Vprocess_alist. */
823 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
824 /* GC treated elements set to nil. */
825 Fdelq (Qnil
, deleted_pid_list
));
826 /* If the process has already signaled, remove it from the list. */
827 if (p
->raw_status_new
)
830 if (CONSP (p
->status
))
831 symbol
= XCAR (p
->status
);
832 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
834 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
838 Fkill_process (process
, Qnil
);
839 /* Do this now, since remove_process will make sigchld_handler do nothing. */
841 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
842 XSETINT (p
->tick
, ++process_tick
);
846 remove_process (process
);
850 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
851 doc
: /* Return the status of PROCESS.
852 The returned value is one of the following symbols:
853 run -- for a process that is running.
854 stop -- for a process stopped but continuable.
855 exit -- for a process that has exited.
856 signal -- for a process that has got a fatal signal.
857 open -- for a network stream connection that is open.
858 listen -- for a network stream server that is listening.
859 closed -- for a network stream connection that is closed.
860 connect -- when waiting for a non-blocking connection to complete.
861 failed -- when a non-blocking connection has failed.
862 nil -- if arg is a process name and no such process exists.
863 PROCESS may be a process, a buffer, the name of a process, or
864 nil, indicating the current buffer's process. */)
866 register Lisp_Object process
;
868 register struct Lisp_Process
*p
;
869 register Lisp_Object status
;
871 if (STRINGP (process
))
872 process
= Fget_process (process
);
874 process
= get_process (process
);
879 p
= XPROCESS (process
);
880 if (p
->raw_status_new
)
884 status
= XCAR (status
);
887 if (EQ (status
, Qexit
))
889 else if (EQ (p
->command
, Qt
))
891 else if (EQ (status
, Qrun
))
897 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
899 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
900 If PROCESS has not yet exited or died, return 0. */)
902 register Lisp_Object process
;
904 CHECK_PROCESS (process
);
905 if (XPROCESS (process
)->raw_status_new
)
906 update_status (XPROCESS (process
));
907 if (CONSP (XPROCESS (process
)->status
))
908 return XCAR (XCDR (XPROCESS (process
)->status
));
909 return make_number (0);
912 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
913 doc
: /* Return the process id of PROCESS.
914 This is the pid of the external process which PROCESS uses or talks to.
915 For a network connection, this value is nil. */)
917 register Lisp_Object process
;
919 /* Assignment to EMACS_INT stops GCC whining about limited range of
923 CHECK_PROCESS (process
);
924 pid
= XPROCESS (process
)->pid
;
925 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
928 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
929 doc
: /* Return the name of PROCESS, as a string.
930 This is the name of the program invoked in PROCESS,
931 possibly modified to make it unique among process names. */)
933 register Lisp_Object process
;
935 CHECK_PROCESS (process
);
936 return XPROCESS (process
)->name
;
939 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
940 doc
: /* Return the command that was executed to start PROCESS.
941 This is a list of strings, the first string being the program executed
942 and the rest of the strings being the arguments given to it.
943 For a non-child channel, this is nil. */)
945 register Lisp_Object process
;
947 CHECK_PROCESS (process
);
948 return XPROCESS (process
)->command
;
951 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
952 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
953 This is the terminal that the process itself reads and writes on,
954 not the name of the pty that Emacs uses to talk with that terminal. */)
956 register Lisp_Object process
;
958 CHECK_PROCESS (process
);
959 return XPROCESS (process
)->tty_name
;
962 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
964 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
966 register Lisp_Object process
, buffer
;
968 struct Lisp_Process
*p
;
970 CHECK_PROCESS (process
);
972 CHECK_BUFFER (buffer
);
973 p
= XPROCESS (process
);
976 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
977 setup_process_coding_systems (process
);
981 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
983 doc
: /* Return the buffer PROCESS is associated with.
984 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
986 register Lisp_Object process
;
988 CHECK_PROCESS (process
);
989 return XPROCESS (process
)->buffer
;
992 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
994 doc
: /* Return the marker for the end of the last output from PROCESS. */)
996 register Lisp_Object process
;
998 CHECK_PROCESS (process
);
999 return XPROCESS (process
)->mark
;
1002 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1004 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1005 t means stop accepting output from the process.
1007 When a process has a filter, its buffer is not used for output.
1008 Instead, each time it does output, the entire string of output is
1009 passed to the filter.
1011 The filter gets two arguments: the process and the string of output.
1012 The string argument is normally a multibyte string, except:
1013 - if the process' input coding system is no-conversion or raw-text,
1014 it is a unibyte string (the non-converted input), or else
1015 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1016 string (the result of converting the decoded input multibyte
1017 string to unibyte with `string-make-unibyte'). */)
1019 register Lisp_Object process
, filter
;
1021 struct Lisp_Process
*p
;
1023 CHECK_PROCESS (process
);
1024 p
= XPROCESS (process
);
1026 /* Don't signal an error if the process' input file descriptor
1027 is closed. This could make debugging Lisp more difficult,
1028 for example when doing something like
1030 (setq process (start-process ...))
1032 (set-process-filter process ...) */
1034 if (XINT (p
->infd
) >= 0)
1036 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1038 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
1039 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
1041 else if (EQ (p
->filter
, Qt
)
1042 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
1044 FD_SET (XINT (p
->infd
), &input_wait_mask
);
1045 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
1051 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1052 setup_process_coding_systems (process
);
1056 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1058 doc
: /* Returns the filter function of PROCESS; nil if none.
1059 See `set-process-filter' for more info on filter functions. */)
1061 register Lisp_Object process
;
1063 CHECK_PROCESS (process
);
1064 return XPROCESS (process
)->filter
;
1067 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1069 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1070 The sentinel is called as a function when the process changes state.
1071 It gets two arguments: the process, and a string describing the change. */)
1073 register Lisp_Object process
, sentinel
;
1075 struct Lisp_Process
*p
;
1077 CHECK_PROCESS (process
);
1078 p
= XPROCESS (process
);
1080 p
->sentinel
= sentinel
;
1082 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1086 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1088 doc
: /* Return the sentinel of PROCESS; nil if none.
1089 See `set-process-sentinel' for more info on sentinels. */)
1091 register Lisp_Object process
;
1093 CHECK_PROCESS (process
);
1094 return XPROCESS (process
)->sentinel
;
1097 DEFUN ("set-process-window-size", Fset_process_window_size
,
1098 Sset_process_window_size
, 3, 3, 0,
1099 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1100 (process
, height
, width
)
1101 register Lisp_Object process
, height
, width
;
1103 CHECK_PROCESS (process
);
1104 CHECK_NATNUM (height
);
1105 CHECK_NATNUM (width
);
1107 if (XINT (XPROCESS (process
)->infd
) < 0
1108 || set_window_size (XINT (XPROCESS (process
)->infd
),
1109 XINT (height
), XINT (width
)) <= 0)
1115 DEFUN ("set-process-inherit-coding-system-flag",
1116 Fset_process_inherit_coding_system_flag
,
1117 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1118 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1119 If the second argument FLAG is non-nil, then the variable
1120 `buffer-file-coding-system' of the buffer associated with PROCESS
1121 will be bound to the value of the coding system used to decode
1124 This is useful when the coding system specified for the process buffer
1125 leaves either the character code conversion or the end-of-line conversion
1126 unspecified, or if the coding system used to decode the process output
1127 is more appropriate for saving the process buffer.
1129 Binding the variable `inherit-process-coding-system' to non-nil before
1130 starting the process is an alternative way of setting the inherit flag
1131 for the process which will run. */)
1133 register Lisp_Object process
, flag
;
1135 CHECK_PROCESS (process
);
1136 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
1140 DEFUN ("process-inherit-coding-system-flag",
1141 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1143 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1144 If this flag is t, `buffer-file-coding-system' of the buffer
1145 associated with PROCESS will inherit the coding system used to decode
1146 the process output. */)
1148 register Lisp_Object process
;
1150 CHECK_PROCESS (process
);
1151 return XPROCESS (process
)->inherit_coding_system_flag
;
1154 DEFUN ("set-process-query-on-exit-flag",
1155 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1157 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1158 If the second argument FLAG is non-nil, Emacs will query the user before
1159 exiting if PROCESS is running. */)
1161 register Lisp_Object process
, flag
;
1163 CHECK_PROCESS (process
);
1164 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
1168 DEFUN ("process-query-on-exit-flag",
1169 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1171 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1173 register Lisp_Object process
;
1175 CHECK_PROCESS (process
);
1176 return Fnull (XPROCESS (process
)->kill_without_query
);
1179 #ifdef DATAGRAM_SOCKETS
1180 Lisp_Object
Fprocess_datagram_address ();
1183 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1185 doc
: /* Return the contact info of PROCESS; t for a real child.
1186 For a net connection, the value depends on the optional KEY arg.
1187 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1188 if KEY is t, the complete contact information for the connection is
1189 returned, else the specific value for the keyword KEY is returned.
1190 See `make-network-process' for a list of keywords. */)
1192 register Lisp_Object process
, key
;
1194 Lisp_Object contact
;
1196 CHECK_PROCESS (process
);
1197 contact
= XPROCESS (process
)->childp
;
1199 #ifdef DATAGRAM_SOCKETS
1200 if (DATAGRAM_CONN_P (process
)
1201 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1202 contact
= Fplist_put (contact
, QCremote
,
1203 Fprocess_datagram_address (process
));
1206 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1209 return Fcons (Fplist_get (contact
, QChost
),
1210 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1211 return Fplist_get (contact
, key
);
1214 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1216 doc
: /* Return the plist of PROCESS. */)
1218 register Lisp_Object process
;
1220 CHECK_PROCESS (process
);
1221 return XPROCESS (process
)->plist
;
1224 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1226 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1228 register Lisp_Object process
, plist
;
1230 CHECK_PROCESS (process
);
1233 XPROCESS (process
)->plist
= plist
;
1237 #if 0 /* Turned off because we don't currently record this info
1238 in the process. Perhaps add it. */
1239 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1240 doc
: /* Return the connection type of PROCESS.
1241 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1242 a socket connection. */)
1244 Lisp_Object process
;
1246 return XPROCESS (process
)->type
;
1251 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1253 doc
: /* Convert network ADDRESS from internal format to a string.
1254 A 4 or 5 element vector represents an IPv4 address (with port number).
1255 An 8 or 9 element vector represents an IPv6 address (with port number).
1256 If optional second argument OMIT-PORT is non-nil, don't include a port
1257 number in the string, even when present in ADDRESS.
1258 Returns nil if format of ADDRESS is invalid. */)
1259 (address
, omit_port
)
1260 Lisp_Object address
, omit_port
;
1265 if (STRINGP (address
)) /* AF_LOCAL */
1268 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1270 register struct Lisp_Vector
*p
= XVECTOR (address
);
1271 Lisp_Object args
[10];
1274 if (p
->size
== 4 || (p
->size
== 5 && !NILP (omit_port
)))
1276 args
[0] = build_string ("%d.%d.%d.%d");
1279 else if (p
->size
== 5)
1281 args
[0] = build_string ("%d.%d.%d.%d:%d");
1284 else if (p
->size
== 8 || (p
->size
== 9 && !NILP (omit_port
)))
1286 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1289 else if (p
->size
== 9)
1291 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1297 for (i
= 0; i
< nargs
; i
++)
1299 EMACS_INT element
= XINT (p
->contents
[i
]);
1301 if (element
< 0 || element
> 65535)
1304 if (nargs
<= 5 /* IPv4 */
1305 && i
< 4 /* host, not port */
1309 args
[i
+1] = p
->contents
[i
];
1312 return Fformat (nargs
+1, args
);
1315 if (CONSP (address
))
1317 Lisp_Object args
[2];
1318 args
[0] = build_string ("<Family %d>");
1319 args
[1] = Fcar (address
);
1320 return Fformat (2, args
);
1328 list_processes_1 (query_only
)
1329 Lisp_Object query_only
;
1331 register Lisp_Object tail
, tem
;
1332 Lisp_Object proc
, minspace
, tem1
;
1333 register struct Lisp_Process
*p
;
1335 int w_proc
, w_buffer
, w_tty
;
1337 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1339 w_proc
= 4; /* Proc */
1340 w_buffer
= 6; /* Buffer */
1341 w_tty
= 0; /* Omit if no ttys */
1343 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1347 proc
= Fcdr (Fcar (tail
));
1348 p
= XPROCESS (proc
);
1349 if (NILP (p
->childp
))
1351 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1353 if (STRINGP (p
->name
)
1354 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1356 if (!NILP (p
->buffer
))
1358 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1359 w_buffer
= 8; /* (Killed) */
1360 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1363 if (STRINGP (p
->tty_name
)
1364 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1368 XSETFASTINT (i_status
, w_proc
+ 1);
1369 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1372 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1373 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1376 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1379 XSETFASTINT (minspace
, 1);
1381 set_buffer_internal (XBUFFER (Vstandard_output
));
1382 current_buffer
->undo_list
= Qt
;
1384 current_buffer
->truncate_lines
= Qt
;
1386 write_string ("Proc", -1);
1387 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1388 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1391 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1393 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1394 write_string ("\n", -1);
1396 write_string ("----", -1);
1397 Findent_to (i_status
, minspace
); write_string ("------", -1);
1398 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1401 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1403 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1404 write_string ("\n", -1);
1406 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1410 proc
= Fcdr (Fcar (tail
));
1411 p
= XPROCESS (proc
);
1412 if (NILP (p
->childp
))
1414 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1417 Finsert (1, &p
->name
);
1418 Findent_to (i_status
, minspace
);
1420 if (p
->raw_status_new
)
1423 if (CONSP (p
->status
))
1424 symbol
= XCAR (p
->status
);
1426 if (EQ (symbol
, Qsignal
))
1429 tem
= Fcar (Fcdr (p
->status
));
1431 if (XINT (tem
) < NSIG
)
1432 write_string (sys_errlist
[XINT (tem
)], -1);
1435 Fprinc (symbol
, Qnil
);
1437 else if (NETCONN1_P (p
))
1439 if (EQ (symbol
, Qexit
))
1440 write_string ("closed", -1);
1441 else if (EQ (p
->command
, Qt
))
1442 write_string ("stopped", -1);
1443 else if (EQ (symbol
, Qrun
))
1444 write_string ("open", -1);
1446 Fprinc (symbol
, Qnil
);
1449 Fprinc (symbol
, Qnil
);
1451 if (EQ (symbol
, Qexit
))
1454 tem
= Fcar (Fcdr (p
->status
));
1457 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1458 write_string (tembuf
, -1);
1462 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
) || EQ (symbol
, Qclosed
))
1465 Findent_to (i_buffer
, minspace
);
1466 if (NILP (p
->buffer
))
1467 insert_string ("(none)");
1468 else if (NILP (XBUFFER (p
->buffer
)->name
))
1469 insert_string ("(Killed)");
1471 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1475 Findent_to (i_tty
, minspace
);
1476 if (STRINGP (p
->tty_name
))
1477 Finsert (1, &p
->tty_name
);
1480 Findent_to (i_command
, minspace
);
1482 if (EQ (p
->status
, Qlisten
))
1484 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1485 if (INTEGERP (port
))
1486 port
= Fnumber_to_string (port
);
1488 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1489 sprintf (tembuf
, "(network %s server on %s)\n",
1490 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1491 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1492 insert_string (tembuf
);
1494 else if (NETCONN1_P (p
))
1496 /* For a local socket, there is no host name,
1497 so display service instead. */
1498 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1499 if (!STRINGP (host
))
1501 host
= Fplist_get (p
->childp
, QCservice
);
1502 if (INTEGERP (host
))
1503 host
= Fnumber_to_string (host
);
1506 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1507 sprintf (tembuf
, "(network %s connection to %s)\n",
1508 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1509 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1510 insert_string (tembuf
);
1522 insert_string (" ");
1524 insert_string ("\n");
1528 status_notify (NULL
);
1532 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1533 doc
: /* Display a list of all processes.
1534 If optional argument QUERY-ONLY is non-nil, only processes with
1535 the query-on-exit flag set will be listed.
1536 Any process listed as exited or signaled is actually eliminated
1537 after the listing is made. */)
1539 Lisp_Object query_only
;
1541 internal_with_output_to_temp_buffer ("*Process List*",
1542 list_processes_1
, query_only
);
1546 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1547 doc
: /* Return a list of all processes. */)
1550 return Fmapcar (Qcdr
, Vprocess_alist
);
1553 /* Starting asynchronous inferior processes. */
1555 static Lisp_Object
start_process_unwind ();
1557 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1558 doc
: /* Start a program in a subprocess. Return the process object for it.
1559 NAME is name for process. It is modified if necessary to make it unique.
1560 BUFFER is the buffer (or buffer name) to associate with the process.
1562 Process output (both standard output and standard error streams) goes
1563 at end of BUFFER, unless you specify an output stream or filter
1564 function to handle the output. BUFFER may also be nil, meaning that
1565 this process is not associated with any buffer. PROGRAM is the
1566 program file name. It is searched for in PATH. Remaining arguments
1567 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 = 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
= Vprocess_adaptive_read_buffering
;
1645 /* Make the process marker point into the process buffer (if any). */
1646 if (BUFFERP (buffer
))
1647 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1648 BUF_ZV (XBUFFER (buffer
)),
1649 BUF_ZV_BYTE (XBUFFER (buffer
)));
1652 /* Decide coding systems for communicating with the process. Here
1653 we don't setup the structure coding_system nor pay attention to
1654 unibyte mode. They are done in create_process. */
1656 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1657 Lisp_Object coding_systems
= Qt
;
1658 Lisp_Object val
, *args2
;
1659 struct gcpro gcpro1
, gcpro2
;
1661 val
= Vcoding_system_for_read
;
1664 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1665 args2
[0] = Qstart_process
;
1666 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1667 GCPRO2 (proc
, current_dir
);
1668 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1670 if (CONSP (coding_systems
))
1671 val
= XCAR (coding_systems
);
1672 else if (CONSP (Vdefault_process_coding_system
))
1673 val
= XCAR (Vdefault_process_coding_system
);
1675 XPROCESS (proc
)->decode_coding_system
= val
;
1677 val
= Vcoding_system_for_write
;
1680 if (EQ (coding_systems
, Qt
))
1682 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1683 args2
[0] = Qstart_process
;
1684 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1685 GCPRO2 (proc
, current_dir
);
1686 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1689 if (CONSP (coding_systems
))
1690 val
= XCDR (coding_systems
);
1691 else if (CONSP (Vdefault_process_coding_system
))
1692 val
= XCDR (Vdefault_process_coding_system
);
1694 XPROCESS (proc
)->encode_coding_system
= val
;
1698 /* Make a one member argv with all args concatenated
1699 together separated by a blank. */
1700 len
= SBYTES (program
) + 2;
1701 for (i
= 3; i
< nargs
; i
++)
1705 len
+= SBYTES (tem
) + 1; /* count the blank */
1707 new_argv
= (unsigned char *) alloca (len
);
1708 strcpy (new_argv
, SDATA (program
));
1709 for (i
= 3; i
< nargs
; i
++)
1713 strcat (new_argv
, " ");
1714 strcat (new_argv
, SDATA (tem
));
1716 /* Need to add code here to check for program existence on VMS */
1719 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1721 /* If program file name is not absolute, search our path for it.
1722 Put the name we will really use in TEM. */
1723 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1724 && !(SCHARS (program
) > 1
1725 && IS_DEVICE_SEP (SREF (program
, 1))))
1727 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1730 GCPRO4 (name
, program
, buffer
, current_dir
);
1731 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1734 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1735 tem
= Fexpand_file_name (tem
, Qnil
);
1739 if (!NILP (Ffile_directory_p (program
)))
1740 error ("Specified program for new process is a directory");
1744 /* If program file name starts with /: for quoting a magic name,
1746 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1747 && SREF (tem
, 1) == ':')
1748 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1750 /* Encode the file name and put it in NEW_ARGV.
1751 That's where the child will use it to execute the program. */
1752 tem
= ENCODE_FILE (tem
);
1753 new_argv
[0] = SDATA (tem
);
1755 /* Here we encode arguments by the coding system used for sending
1756 data to the process. We don't support using different coding
1757 systems for encoding arguments and for encoding data sent to the
1760 for (i
= 3; i
< nargs
; i
++)
1764 if (STRING_MULTIBYTE (tem
))
1765 tem
= (code_convert_string_norecord
1766 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1767 new_argv
[i
- 2] = SDATA (tem
);
1769 new_argv
[i
- 2] = 0;
1770 #endif /* not VMS */
1772 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1773 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1774 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1775 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1777 XPROCESS (proc
)->inherit_coding_system_flag
1778 = (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 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1952 XSETINT (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
? Qt
: Qnil
);
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
= XINT (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
= XINT (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.
2726 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2727 stream type connection, `datagram' creates a datagram type connection.
2729 :family FAMILY -- FAMILY is the address (and protocol) family for the
2730 service specified by HOST and SERVICE. The default (nil) is to use
2731 whatever address family (IPv4 or IPv6) that is defined for the host
2732 and port number specified by HOST and SERVICE. Other address families
2734 local -- for a local (i.e. UNIX) address specified by SERVICE.
2735 ipv4 -- use IPv4 address family only.
2736 ipv6 -- use IPv6 address family only.
2738 :local ADDRESS -- ADDRESS is the local address used for the connection.
2739 This parameter is ignored when opening a client process. When specified
2740 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2742 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2743 connection. This parameter is ignored when opening a stream server
2744 process. For a datagram server process, it specifies the initial
2745 setting of the remote datagram address. When specified for a client
2746 process, the FAMILY, HOST, and SERVICE args are ignored.
2748 The format of ADDRESS depends on the address family:
2749 - An IPv4 address is represented as an vector of integers [A B C D P]
2750 corresponding to numeric IP address A.B.C.D and port number P.
2751 - A local address is represented as a string with the address in the
2752 local address space.
2753 - An "unsupported family" address is represented by a cons (F . AV)
2754 where F is the family number and AV is a vector containing the socket
2755 address data with one element per address data byte. Do not rely on
2756 this format in portable code, as it may depend on implementation
2757 defined constants, data sizes, and data structure alignment.
2759 :coding CODING -- If CODING is a symbol, it specifies the coding
2760 system used for both reading and writing for this process. If CODING
2761 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2762 ENCODING is used for writing.
2764 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2765 return without waiting for the connection to complete; instead, the
2766 sentinel function will be called with second arg matching "open" (if
2767 successful) or "failed" when the connect completes. Default is to use
2768 a blocking connect (i.e. wait) for stream type connections.
2770 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2771 running when Emacs is exited.
2773 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2774 In the stopped state, a server process does not accept new
2775 connections, and a client process does not handle incoming traffic.
2776 The stopped state is cleared by `continue-process' and set by
2779 :filter FILTER -- Install FILTER as the process filter.
2781 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2782 process filter are multibyte, otherwise they are unibyte.
2783 If this keyword is not specified, the strings are multibyte iff
2784 `default-enable-multibyte-characters' is non-nil.
2786 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2788 :log LOG -- Install LOG as the server process log function. This
2789 function is called when the server accepts a network connection from a
2790 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2791 is the server process, CLIENT is the new process for the connection,
2792 and MESSAGE is a string.
2794 :plist PLIST -- Install PLIST as the new process' initial plist.
2796 :server QLEN -- if QLEN is non-nil, create a server process for the
2797 specified FAMILY, SERVICE, and connection type (stream or datagram).
2798 If QLEN is an integer, it is used as the max. length of the server's
2799 pending connection queue (also known as the backlog); the default
2800 queue length is 5. Default is to create a client process.
2802 The following network options can be specified for this connection:
2804 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2805 :dontroute BOOL -- Only send to directly connected hosts.
2806 :keepalive BOOL -- Send keep-alive messages on network stream.
2807 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2808 :oobinline BOOL -- Place out-of-band data in receive data stream.
2809 :priority INT -- Set protocol defined priority for sent packets.
2810 :reuseaddr BOOL -- Allow reusing a recently used local address
2811 (this is allowed by default for a server process).
2812 :bindtodevice NAME -- bind to interface NAME. Using this may require
2813 special privileges on some systems.
2815 Consult the relevant system programmer's manual pages for more
2816 information on using these options.
2819 A server process will listen for and accept connections from clients.
2820 When a client connection is accepted, a new network process is created
2821 for the connection with the following parameters:
2823 - The client's process name is constructed by concatenating the server
2824 process' NAME and a client identification string.
2825 - If the FILTER argument is non-nil, the client process will not get a
2826 separate process buffer; otherwise, the client's process buffer is a newly
2827 created buffer named after the server process' BUFFER name or process
2828 NAME concatenated with the client identification string.
2829 - The connection type and the process filter and sentinel parameters are
2830 inherited from the server process' TYPE, FILTER and SENTINEL.
2831 - The client process' contact info is set according to the client's
2832 addressing information (typically an IP address and a port number).
2833 - The client process' plist is initialized from the server's plist.
2835 Notice that the FILTER and SENTINEL args are never used directly by
2836 the server process. Also, the BUFFER argument is not used directly by
2837 the server process, but via the optional :log function, accepted (and
2838 failed) connections may be logged in the server process' buffer.
2840 The original argument list, modified with the actual connection
2841 information, is available via the `process-contact' function.
2843 usage: (make-network-process &rest ARGS) */)
2849 Lisp_Object contact
;
2850 struct Lisp_Process
*p
;
2851 #ifdef HAVE_GETADDRINFO
2852 struct addrinfo ai
, *res
, *lres
;
2853 struct addrinfo hints
;
2854 char *portstring
, portbuf
[128];
2855 #else /* HAVE_GETADDRINFO */
2856 struct _emacs_addrinfo
2862 struct sockaddr
*ai_addr
;
2863 struct _emacs_addrinfo
*ai_next
;
2865 #endif /* HAVE_GETADDRINFO */
2866 struct sockaddr_in address_in
;
2867 #ifdef HAVE_LOCAL_SOCKETS
2868 struct sockaddr_un address_un
;
2873 int s
= -1, outch
, inch
;
2874 struct gcpro gcpro1
;
2875 int count
= SPECPDL_INDEX ();
2877 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2879 Lisp_Object name
, buffer
, host
, service
, address
;
2880 Lisp_Object filter
, sentinel
;
2881 int is_non_blocking_client
= 0;
2882 int is_server
= 0, backlog
= 5;
2889 /* Save arguments for process-contact and clone-process. */
2890 contact
= Flist (nargs
, args
);
2894 /* Ensure socket support is loaded if available. */
2895 init_winsock (TRUE
);
2898 /* :type TYPE (nil: stream, datagram */
2899 tem
= Fplist_get (contact
, QCtype
);
2901 socktype
= SOCK_STREAM
;
2902 #ifdef DATAGRAM_SOCKETS
2903 else if (EQ (tem
, Qdatagram
))
2904 socktype
= SOCK_DGRAM
;
2907 error ("Unsupported connection type");
2910 tem
= Fplist_get (contact
, QCserver
);
2913 /* Don't support network sockets when non-blocking mode is
2914 not available, since a blocked Emacs is not useful. */
2915 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2916 error ("Network servers not supported");
2920 backlog
= XINT (tem
);
2924 /* Make QCaddress an alias for :local (server) or :remote (client). */
2925 QCaddress
= is_server
? QClocal
: QCremote
;
2928 if (!is_server
&& socktype
== SOCK_STREAM
2929 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2931 #ifndef NON_BLOCKING_CONNECT
2932 error ("Non-blocking connect not supported");
2934 is_non_blocking_client
= 1;
2938 name
= Fplist_get (contact
, QCname
);
2939 buffer
= Fplist_get (contact
, QCbuffer
);
2940 filter
= Fplist_get (contact
, QCfilter
);
2941 sentinel
= Fplist_get (contact
, QCsentinel
);
2943 CHECK_STRING (name
);
2946 /* Let's handle TERM before things get complicated ... */
2947 host
= Fplist_get (contact
, QChost
);
2948 CHECK_STRING (host
);
2950 service
= Fplist_get (contact
, QCservice
);
2951 if (INTEGERP (service
))
2952 port
= htons ((unsigned short) XINT (service
));
2955 struct servent
*svc_info
;
2956 CHECK_STRING (service
);
2957 svc_info
= getservbyname (SDATA (service
), "tcp");
2959 error ("Unknown service: %s", SDATA (service
));
2960 port
= svc_info
->s_port
;
2963 s
= connect_server (0);
2965 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2966 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2967 send_command (s
, C_DUMB
, 1, 0);
2969 #else /* not TERM */
2971 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2972 ai
.ai_socktype
= socktype
;
2977 /* :local ADDRESS or :remote ADDRESS */
2978 address
= Fplist_get (contact
, QCaddress
);
2979 if (!NILP (address
))
2981 host
= service
= Qnil
;
2983 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2984 error ("Malformed :address");
2985 ai
.ai_family
= family
;
2986 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2987 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2991 /* :family FAMILY -- nil (for Inet), local, or integer. */
2992 tem
= Fplist_get (contact
, QCfamily
);
2995 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3001 #ifdef HAVE_LOCAL_SOCKETS
3002 else if (EQ (tem
, Qlocal
))
3006 else if (EQ (tem
, Qipv6
))
3009 else if (EQ (tem
, Qipv4
))
3011 else if (INTEGERP (tem
))
3012 family
= XINT (tem
);
3014 error ("Unknown address family");
3016 ai
.ai_family
= family
;
3018 /* :service SERVICE -- string, integer (port number), or t (random port). */
3019 service
= Fplist_get (contact
, QCservice
);
3021 #ifdef HAVE_LOCAL_SOCKETS
3022 if (family
== AF_LOCAL
)
3024 /* Host is not used. */
3026 CHECK_STRING (service
);
3027 bzero (&address_un
, sizeof address_un
);
3028 address_un
.sun_family
= AF_LOCAL
;
3029 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
3030 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3031 ai
.ai_addrlen
= sizeof address_un
;
3036 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3037 host
= Fplist_get (contact
, QChost
);
3040 if (EQ (host
, Qlocal
))
3041 host
= build_string ("localhost");
3042 CHECK_STRING (host
);
3045 /* Slow down polling to every ten seconds.
3046 Some kernels have a bug which causes retrying connect to fail
3047 after a connect. Polling can interfere with gethostbyname too. */
3048 #ifdef POLL_FOR_INPUT
3049 if (socktype
== SOCK_STREAM
)
3051 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3052 bind_polling_period (10);
3056 #ifdef HAVE_GETADDRINFO
3057 /* If we have a host, use getaddrinfo to resolve both host and service.
3058 Otherwise, use getservbyname to lookup the service. */
3062 /* SERVICE can either be a string or int.
3063 Convert to a C string for later use by getaddrinfo. */
3064 if (EQ (service
, Qt
))
3066 else if (INTEGERP (service
))
3068 sprintf (portbuf
, "%ld", (long) XINT (service
));
3069 portstring
= portbuf
;
3073 CHECK_STRING (service
);
3074 portstring
= SDATA (service
);
3079 memset (&hints
, 0, sizeof (hints
));
3081 hints
.ai_family
= family
;
3082 hints
.ai_socktype
= socktype
;
3083 hints
.ai_protocol
= 0;
3084 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
3086 #ifdef HAVE_GAI_STRERROR
3087 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
3089 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
3095 #endif /* HAVE_GETADDRINFO */
3097 /* We end up here if getaddrinfo is not defined, or in case no hostname
3098 has been specified (e.g. for a local server process). */
3100 if (EQ (service
, Qt
))
3102 else if (INTEGERP (service
))
3103 port
= htons ((unsigned short) XINT (service
));
3106 struct servent
*svc_info
;
3107 CHECK_STRING (service
);
3108 svc_info
= getservbyname (SDATA (service
),
3109 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3111 error ("Unknown service: %s", SDATA (service
));
3112 port
= svc_info
->s_port
;
3115 bzero (&address_in
, sizeof address_in
);
3116 address_in
.sin_family
= family
;
3117 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3118 address_in
.sin_port
= port
;
3120 #ifndef HAVE_GETADDRINFO
3123 struct hostent
*host_info_ptr
;
3125 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3126 as it may `hang' Emacs for a very long time. */
3129 host_info_ptr
= gethostbyname (SDATA (host
));
3134 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
3135 host_info_ptr
->h_length
);
3136 family
= host_info_ptr
->h_addrtype
;
3137 address_in
.sin_family
= family
;
3140 /* Attempt to interpret host as numeric inet address */
3142 IN_ADDR numeric_addr
;
3143 numeric_addr
= inet_addr ((char *) SDATA (host
));
3144 if (NUMERIC_ADDR_ERROR
)
3145 error ("Unknown host \"%s\"", SDATA (host
));
3147 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
3148 sizeof (address_in
.sin_addr
));
3152 #endif /* not HAVE_GETADDRINFO */
3154 ai
.ai_family
= family
;
3155 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3156 ai
.ai_addrlen
= sizeof address_in
;
3160 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3161 when connect is interrupted. So let's not let it get interrupted.
3162 Note we do not turn off polling, because polling is only used
3163 when not interrupt_input, and thus not normally used on the systems
3164 which have this bug. On systems which use polling, there's no way
3165 to quit if polling is turned off. */
3167 && !is_server
&& socktype
== SOCK_STREAM
)
3169 /* Comment from KFS: The original open-network-stream code
3170 didn't unwind protect this, but it seems like the proper
3171 thing to do. In any case, I don't see how it could harm to
3172 do this -- and it makes cleanup (using unbind_to) easier. */
3173 record_unwind_protect (unwind_request_sigio
, Qnil
);
3177 /* Do this in case we never enter the for-loop below. */
3178 count1
= SPECPDL_INDEX ();
3181 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3187 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3194 #ifdef DATAGRAM_SOCKETS
3195 if (!is_server
&& socktype
== SOCK_DGRAM
)
3197 #endif /* DATAGRAM_SOCKETS */
3199 #ifdef NON_BLOCKING_CONNECT
3200 if (is_non_blocking_client
)
3203 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3205 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3217 /* Make us close S if quit. */
3218 record_unwind_protect (close_file_unwind
, make_number (s
));
3220 /* Parse network options in the arg list.
3221 We simply ignore anything which isn't a known option (including other keywords).
3222 An error is signalled if setting a known option fails. */
3223 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3224 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3228 /* Configure as a server socket. */
3230 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3231 explicit :reuseaddr key to override this. */
3232 #ifdef HAVE_LOCAL_SOCKETS
3233 if (family
!= AF_LOCAL
)
3235 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3238 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3239 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3242 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3243 report_file_error ("Cannot bind server socket", Qnil
);
3245 #ifdef HAVE_GETSOCKNAME
3246 if (EQ (service
, Qt
))
3248 struct sockaddr_in sa1
;
3249 int len1
= sizeof (sa1
);
3250 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3252 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3253 service
= make_number (ntohs (sa1
.sin_port
));
3254 contact
= Fplist_put (contact
, QCservice
, service
);
3259 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3260 report_file_error ("Cannot listen on server socket", Qnil
);
3268 /* This turns off all alarm-based interrupts; the
3269 bind_polling_period call above doesn't always turn all the
3270 short-interval ones off, especially if interrupt_input is
3273 It'd be nice to be able to control the connect timeout
3274 though. Would non-blocking connect calls be portable?
3276 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3278 turn_on_atimers (0);
3280 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3283 turn_on_atimers (1);
3285 if (ret
== 0 || xerrno
== EISCONN
)
3287 /* The unwind-protect will be discarded afterwards.
3288 Likewise for immediate_quit. */
3292 #ifdef NON_BLOCKING_CONNECT
3294 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3298 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3306 /* Discard the unwind protect closing S. */
3307 specpdl_ptr
= specpdl
+ count1
;
3311 if (xerrno
== EINTR
)
3317 #ifdef DATAGRAM_SOCKETS
3318 if (socktype
== SOCK_DGRAM
)
3320 if (datagram_address
[s
].sa
)
3322 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3323 datagram_address
[s
].len
= lres
->ai_addrlen
;
3327 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3328 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3331 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3332 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3333 conv_lisp_to_sockaddr (rfamily
, remote
,
3334 datagram_address
[s
].sa
, rlen
);
3338 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3341 contact
= Fplist_put (contact
, QCaddress
,
3342 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3343 #ifdef HAVE_GETSOCKNAME
3346 struct sockaddr_in sa1
;
3347 int len1
= sizeof (sa1
);
3348 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3349 contact
= Fplist_put (contact
, QClocal
,
3350 conv_sockaddr_to_lisp (&sa1
, len1
));
3357 #ifdef HAVE_GETADDRINFO
3366 /* Discard the unwind protect for closing S, if any. */
3367 specpdl_ptr
= specpdl
+ count1
;
3369 /* Unwind bind_polling_period and request_sigio. */
3370 unbind_to (count
, Qnil
);
3374 /* If non-blocking got this far - and failed - assume non-blocking is
3375 not supported after all. This is probably a wrong assumption, but
3376 the normal blocking calls to open-network-stream handles this error
3378 if (is_non_blocking_client
)
3383 report_file_error ("make server process failed", contact
);
3385 report_file_error ("make client process failed", contact
);
3388 #endif /* not TERM */
3394 buffer
= Fget_buffer_create (buffer
);
3395 proc
= make_process (name
);
3397 chan_process
[inch
] = proc
;
3400 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3403 fcntl (inch
, F_SETFL
, O_NDELAY
);
3407 p
= XPROCESS (proc
);
3409 p
->childp
= contact
;
3410 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3413 p
->sentinel
= sentinel
;
3415 p
->filter_multibyte
= buffer_defaults
.enable_multibyte_characters
;
3416 /* Override the above only if :filter-multibyte is specified. */
3417 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3418 p
->filter_multibyte
= Fplist_get (contact
, QCfilter_multibyte
);
3419 p
->log
= Fplist_get (contact
, QClog
);
3420 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3421 p
->kill_without_query
= Qt
;
3422 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3425 XSETINT (p
->infd
, inch
);
3426 XSETINT (p
->outfd
, outch
);
3427 if (is_server
&& socktype
== SOCK_STREAM
)
3428 p
->status
= Qlisten
;
3430 /* Make the process marker point into the process buffer (if any). */
3431 if (BUFFERP (buffer
))
3432 set_marker_both (p
->mark
, buffer
,
3433 BUF_ZV (XBUFFER (buffer
)),
3434 BUF_ZV_BYTE (XBUFFER (buffer
)));
3436 #ifdef NON_BLOCKING_CONNECT
3437 if (is_non_blocking_client
)
3439 /* We may get here if connect did succeed immediately. However,
3440 in that case, we still need to signal this like a non-blocking
3442 p
->status
= Qconnect
;
3443 if (!FD_ISSET (inch
, &connect_wait_mask
))
3445 FD_SET (inch
, &connect_wait_mask
);
3446 num_pending_connects
++;
3451 /* A server may have a client filter setting of Qt, but it must
3452 still listen for incoming connects unless it is stopped. */
3453 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3454 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3456 FD_SET (inch
, &input_wait_mask
);
3457 FD_SET (inch
, &non_keyboard_wait_mask
);
3460 if (inch
> max_process_desc
)
3461 max_process_desc
= inch
;
3463 tem
= Fplist_member (contact
, QCcoding
);
3464 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3465 tem
= Qnil
; /* No error message (too late!). */
3468 /* Setup coding systems for communicating with the network stream. */
3469 struct gcpro gcpro1
;
3470 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3471 Lisp_Object coding_systems
= Qt
;
3472 Lisp_Object args
[5], val
;
3476 val
= XCAR (XCDR (tem
));
3480 else if (!NILP (Vcoding_system_for_read
))
3481 val
= Vcoding_system_for_read
;
3482 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3483 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3484 /* We dare not decode end-of-line format by setting VAL to
3485 Qraw_text, because the existing Emacs Lisp libraries
3486 assume that they receive bare code including a sequene of
3491 if (NILP (host
) || NILP (service
))
3492 coding_systems
= Qnil
;
3495 args
[0] = Qopen_network_stream
, args
[1] = name
,
3496 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3498 coding_systems
= Ffind_operation_coding_system (5, args
);
3501 if (CONSP (coding_systems
))
3502 val
= XCAR (coding_systems
);
3503 else if (CONSP (Vdefault_process_coding_system
))
3504 val
= XCAR (Vdefault_process_coding_system
);
3508 p
->decode_coding_system
= val
;
3512 val
= XCAR (XCDR (tem
));
3516 else if (!NILP (Vcoding_system_for_write
))
3517 val
= Vcoding_system_for_write
;
3518 else if (NILP (current_buffer
->enable_multibyte_characters
))
3522 if (EQ (coding_systems
, Qt
))
3524 if (NILP (host
) || NILP (service
))
3525 coding_systems
= Qnil
;
3528 args
[0] = Qopen_network_stream
, args
[1] = name
,
3529 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3531 coding_systems
= Ffind_operation_coding_system (5, args
);
3535 if (CONSP (coding_systems
))
3536 val
= XCDR (coding_systems
);
3537 else if (CONSP (Vdefault_process_coding_system
))
3538 val
= XCDR (Vdefault_process_coding_system
);
3542 p
->encode_coding_system
= val
;
3544 setup_process_coding_systems (proc
);
3546 p
->decoding_buf
= make_uninit_string (0);
3547 p
->decoding_carryover
= make_number (0);
3548 p
->encoding_buf
= make_uninit_string (0);
3549 p
->encoding_carryover
= make_number (0);
3551 p
->inherit_coding_system_flag
3552 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3558 #endif /* HAVE_SOCKETS */
3561 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3564 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3565 doc
: /* Return an alist of all network interfaces and their network address.
3566 Each element is a cons, the car of which is a string containing the
3567 interface name, and the cdr is the network address in internal
3568 format; see the description of ADDRESS in `make-network-process'. */)
3571 struct ifconf ifconf
;
3572 struct ifreq
*ifreqs
= NULL
;
3577 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3583 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3584 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3591 ifconf
.ifc_len
= buf_size
;
3592 ifconf
.ifc_req
= ifreqs
;
3593 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3599 if (ifconf
.ifc_len
== buf_size
)
3603 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3606 while (--ifaces
>= 0)
3608 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3609 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3610 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3612 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3613 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3614 res
= Fcons (Fcons (build_string (namebuf
),
3615 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3616 sizeof (struct sockaddr
))),
3622 #endif /* SIOCGIFCONF */
3624 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3631 static struct ifflag_def ifflag_table
[] = {
3635 #ifdef IFF_BROADCAST
3636 { IFF_BROADCAST
, "broadcast" },
3639 { IFF_DEBUG
, "debug" },
3642 { IFF_LOOPBACK
, "loopback" },
3644 #ifdef IFF_POINTOPOINT
3645 { IFF_POINTOPOINT
, "pointopoint" },
3648 { IFF_RUNNING
, "running" },
3651 { IFF_NOARP
, "noarp" },
3654 { IFF_PROMISC
, "promisc" },
3656 #ifdef IFF_NOTRAILERS
3657 { IFF_NOTRAILERS
, "notrailers" },
3660 { IFF_ALLMULTI
, "allmulti" },
3663 { IFF_MASTER
, "master" },
3666 { IFF_SLAVE
, "slave" },
3668 #ifdef IFF_MULTICAST
3669 { IFF_MULTICAST
, "multicast" },
3672 { IFF_PORTSEL
, "portsel" },
3674 #ifdef IFF_AUTOMEDIA
3675 { IFF_AUTOMEDIA
, "automedia" },
3678 { IFF_DYNAMIC
, "dynamic" },
3681 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3684 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3687 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3690 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3693 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3698 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3699 doc
: /* Return information about network interface named IFNAME.
3700 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3701 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3702 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3703 FLAGS is the current flags of the interface. */)
3708 Lisp_Object res
= Qnil
;
3713 CHECK_STRING (ifname
);
3715 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3716 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3718 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3723 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3724 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3726 int flags
= rq
.ifr_flags
;
3727 struct ifflag_def
*fp
;
3731 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3733 if (flags
& fp
->flag_bit
)
3735 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3736 flags
-= fp
->flag_bit
;
3739 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3741 if (flags
& (1 << fnum
))
3743 elt
= Fcons (make_number (fnum
), elt
);
3748 res
= Fcons (elt
, res
);
3751 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3752 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3754 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3755 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3759 for (n
= 0; n
< 6; n
++)
3760 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3761 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3764 res
= Fcons (elt
, res
);
3767 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3768 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3771 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3772 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3774 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3778 res
= Fcons (elt
, res
);
3781 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3782 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3785 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3788 res
= Fcons (elt
, res
);
3791 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3792 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3795 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3798 res
= Fcons (elt
, res
);
3802 return any
? res
: Qnil
;
3805 #endif /* HAVE_SOCKETS */
3807 /* Turn off input and output for process PROC. */
3810 deactivate_process (proc
)
3813 register int inchannel
, outchannel
;
3814 register struct Lisp_Process
*p
= XPROCESS (proc
);
3816 inchannel
= XINT (p
->infd
);
3817 outchannel
= XINT (p
->outfd
);
3819 #ifdef ADAPTIVE_READ_BUFFERING
3820 if (XINT (p
->read_output_delay
) > 0)
3822 if (--process_output_delay_count
< 0)
3823 process_output_delay_count
= 0;
3824 XSETINT (p
->read_output_delay
, 0);
3825 p
->read_output_skip
= Qnil
;
3831 /* Beware SIGCHLD hereabouts. */
3832 flush_pending_output (inchannel
);
3835 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3836 sys$
dassgn (outchannel
);
3837 vs
= get_vms_process_pointer (p
->pid
);
3839 give_back_vms_process_stuff (vs
);
3842 emacs_close (inchannel
);
3843 if (outchannel
>= 0 && outchannel
!= inchannel
)
3844 emacs_close (outchannel
);
3847 XSETINT (p
->infd
, -1);
3848 XSETINT (p
->outfd
, -1);
3849 #ifdef DATAGRAM_SOCKETS
3850 if (DATAGRAM_CHAN_P (inchannel
))
3852 xfree (datagram_address
[inchannel
].sa
);
3853 datagram_address
[inchannel
].sa
= 0;
3854 datagram_address
[inchannel
].len
= 0;
3857 chan_process
[inchannel
] = Qnil
;
3858 FD_CLR (inchannel
, &input_wait_mask
);
3859 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3860 #ifdef NON_BLOCKING_CONNECT
3861 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3863 FD_CLR (inchannel
, &connect_wait_mask
);
3864 if (--num_pending_connects
< 0)
3868 if (inchannel
== max_process_desc
)
3871 /* We just closed the highest-numbered process input descriptor,
3872 so recompute the highest-numbered one now. */
3873 max_process_desc
= 0;
3874 for (i
= 0; i
< MAXDESC
; i
++)
3875 if (!NILP (chan_process
[i
]))
3876 max_process_desc
= i
;
3881 /* Close all descriptors currently in use for communication
3882 with subprocess. This is used in a newly-forked subprocess
3883 to get rid of irrelevant descriptors. */
3886 close_process_descs ()
3890 for (i
= 0; i
< MAXDESC
; i
++)
3892 Lisp_Object process
;
3893 process
= chan_process
[i
];
3894 if (!NILP (process
))
3896 int in
= XINT (XPROCESS (process
)->infd
);
3897 int out
= XINT (XPROCESS (process
)->outfd
);
3900 if (out
>= 0 && in
!= out
)
3907 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3909 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3910 It is read into the process' buffers or given to their filter functions.
3911 Non-nil arg PROCESS means do not return until some output has been received
3914 Non-nil second arg SECONDS and third arg MILLISEC are number of
3915 seconds and milliseconds to wait; return after that much time whether
3916 or not there is input. If SECONDS is a floating point number,
3917 it specifies a fractional number of seconds to wait.
3919 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3920 from PROCESS, suspending reading output from other processes.
3921 If JUST-THIS-ONE is an integer, don't run any timers either.
3922 Return non-nil iff we received any output before the timeout expired. */)
3923 (process
, seconds
, millisec
, just_this_one
)
3924 register Lisp_Object process
, seconds
, millisec
, just_this_one
;
3926 int secs
, usecs
= 0;
3928 if (! NILP (process
))
3929 CHECK_PROCESS (process
);
3931 just_this_one
= Qnil
;
3933 if (!NILP (seconds
))
3935 if (INTEGERP (seconds
))
3936 secs
= XINT (seconds
);
3937 else if (FLOATP (seconds
))
3939 double timeout
= XFLOAT_DATA (seconds
);
3940 secs
= (int) timeout
;
3941 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3944 wrong_type_argument (Qnumberp
, seconds
);
3946 if (INTEGERP (millisec
))
3949 usecs
+= XINT (millisec
) * 1000;
3950 carry
= usecs
/ 1000000;
3952 if ((usecs
-= carry
* 1000000) < 0)
3959 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3960 secs
= -1, usecs
= 0;
3963 secs
= NILP (process
) ? -1 : 0;
3966 (wait_reading_process_output (secs
, usecs
, 0, 0,
3968 !NILP (process
) ? XPROCESS (process
) : NULL
,
3969 NILP (just_this_one
) ? 0 :
3970 !INTEGERP (just_this_one
) ? 1 : -1)
3974 /* Accept a connection for server process SERVER on CHANNEL. */
3976 static int connect_counter
= 0;
3979 server_accept_connection (server
, channel
)
3983 Lisp_Object proc
, caller
, name
, buffer
;
3984 Lisp_Object contact
, host
, service
;
3985 struct Lisp_Process
*ps
= XPROCESS (server
);
3986 struct Lisp_Process
*p
;
3990 struct sockaddr_in in
;
3992 struct sockaddr_in6 in6
;
3994 #ifdef HAVE_LOCAL_SOCKETS
3995 struct sockaddr_un un
;
3998 int len
= sizeof saddr
;
4000 s
= accept (channel
, &saddr
.sa
, &len
);
4009 if (code
== EWOULDBLOCK
)
4013 if (!NILP (ps
->log
))
4014 call3 (ps
->log
, server
, Qnil
,
4015 concat3 (build_string ("accept failed with code"),
4016 Fnumber_to_string (make_number (code
)),
4017 build_string ("\n")));
4023 /* Setup a new process to handle the connection. */
4025 /* Generate a unique identification of the caller, and build contact
4026 information for this process. */
4029 switch (saddr
.sa
.sa_family
)
4033 Lisp_Object args
[5];
4034 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4035 args
[0] = build_string ("%d.%d.%d.%d");
4036 args
[1] = make_number (*ip
++);
4037 args
[2] = make_number (*ip
++);
4038 args
[3] = make_number (*ip
++);
4039 args
[4] = make_number (*ip
++);
4040 host
= Fformat (5, args
);
4041 service
= make_number (ntohs (saddr
.in
.sin_port
));
4043 args
[0] = build_string (" <%s:%d>");
4046 caller
= Fformat (3, args
);
4053 Lisp_Object args
[9];
4054 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4056 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4057 for (i
= 0; i
< 8; i
++)
4058 args
[i
+1] = make_number (ntohs(ip6
[i
]));
4059 host
= Fformat (9, args
);
4060 service
= make_number (ntohs (saddr
.in
.sin_port
));
4062 args
[0] = build_string (" <[%s]:%d>");
4065 caller
= Fformat (3, args
);
4070 #ifdef HAVE_LOCAL_SOCKETS
4074 caller
= Fnumber_to_string (make_number (connect_counter
));
4075 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
4079 /* Create a new buffer name for this process if it doesn't have a
4080 filter. The new buffer name is based on the buffer name or
4081 process name of the server process concatenated with the caller
4084 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4088 buffer
= ps
->buffer
;
4090 buffer
= Fbuffer_name (buffer
);
4095 buffer
= concat2 (buffer
, caller
);
4096 buffer
= Fget_buffer_create (buffer
);
4100 /* Generate a unique name for the new server process. Combine the
4101 server process name with the caller identification. */
4103 name
= concat2 (ps
->name
, caller
);
4104 proc
= make_process (name
);
4106 chan_process
[s
] = proc
;
4109 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4112 fcntl (s
, F_SETFL
, O_NDELAY
);
4116 p
= XPROCESS (proc
);
4118 /* Build new contact information for this setup. */
4119 contact
= Fcopy_sequence (ps
->childp
);
4120 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4121 contact
= Fplist_put (contact
, QChost
, host
);
4122 if (!NILP (service
))
4123 contact
= Fplist_put (contact
, QCservice
, service
);
4124 contact
= Fplist_put (contact
, QCremote
,
4125 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4126 #ifdef HAVE_GETSOCKNAME
4128 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4129 contact
= Fplist_put (contact
, QClocal
,
4130 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4133 p
->childp
= contact
;
4134 p
->plist
= Fcopy_sequence (ps
->plist
);
4137 p
->sentinel
= ps
->sentinel
;
4138 p
->filter
= ps
->filter
;
4141 XSETINT (p
->infd
, s
);
4142 XSETINT (p
->outfd
, s
);
4145 /* Client processes for accepted connections are not stopped initially. */
4146 if (!EQ (p
->filter
, Qt
))
4148 FD_SET (s
, &input_wait_mask
);
4149 FD_SET (s
, &non_keyboard_wait_mask
);
4152 if (s
> max_process_desc
)
4153 max_process_desc
= s
;
4155 /* Setup coding system for new process based on server process.
4156 This seems to be the proper thing to do, as the coding system
4157 of the new process should reflect the settings at the time the
4158 server socket was opened; not the current settings. */
4160 p
->decode_coding_system
= ps
->decode_coding_system
;
4161 p
->encode_coding_system
= ps
->encode_coding_system
;
4162 setup_process_coding_systems (proc
);
4164 p
->decoding_buf
= make_uninit_string (0);
4165 p
->decoding_carryover
= make_number (0);
4166 p
->encoding_buf
= make_uninit_string (0);
4167 p
->encoding_carryover
= make_number (0);
4169 p
->inherit_coding_system_flag
4170 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
4172 if (!NILP (ps
->log
))
4173 call3 (ps
->log
, server
, proc
,
4174 concat3 (build_string ("accept from "),
4175 (STRINGP (host
) ? host
: build_string ("-")),
4176 build_string ("\n")));
4178 if (!NILP (p
->sentinel
))
4179 exec_sentinel (proc
,
4180 concat3 (build_string ("open from "),
4181 (STRINGP (host
) ? host
: build_string ("-")),
4182 build_string ("\n")));
4185 /* This variable is different from waiting_for_input in keyboard.c.
4186 It is used to communicate to a lisp process-filter/sentinel (via the
4187 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4188 for user-input when that process-filter was called.
4189 waiting_for_input cannot be used as that is by definition 0 when
4190 lisp code is being evalled.
4191 This is also used in record_asynch_buffer_change.
4192 For that purpose, this must be 0
4193 when not inside wait_reading_process_output. */
4194 static int waiting_for_user_input_p
;
4197 wait_reading_process_output_unwind (data
)
4200 waiting_for_user_input_p
= XINT (data
);
4204 /* This is here so breakpoints can be put on it. */
4206 wait_reading_process_output_1 ()
4210 /* Use a wrapper around select to work around a bug in gdb 5.3.
4211 Normally, the wrapper is optimzed away by inlining.
4213 If emacs is stopped inside select, the gdb backtrace doesn't
4214 show the function which called select, so it is practically
4215 impossible to step through wait_reading_process_output. */
4219 select_wrapper (n
, rfd
, wfd
, xfd
, tmo
)
4221 SELECT_TYPE
*rfd
, *wfd
, *xfd
;
4224 return select (n
, rfd
, wfd
, xfd
, tmo
);
4226 #define select select_wrapper
4229 /* Read and dispose of subprocess output while waiting for timeout to
4230 elapse and/or keyboard input to be available.
4233 timeout in seconds, or
4234 zero for no limit, or
4235 -1 means gobble data immediately available but don't wait for any.
4238 an additional duration to wait, measured in microseconds.
4239 If this is nonzero and time_limit is 0, then the timeout
4240 consists of MICROSECS only.
4242 READ_KBD is a lisp value:
4243 0 to ignore keyboard input, or
4244 1 to return when input is available, or
4245 -1 meaning caller will actually read the input, so don't throw to
4246 the quit handler, or
4248 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4249 output that arrives.
4251 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4252 (and gobble terminal input into the buffer if any arrives).
4254 If WAIT_PROC is specified, wait until something arrives from that
4255 process. The return value is true iff we read some input from
4258 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4259 (suspending output from other processes). A negative value
4260 means don't run any timers either.
4262 If WAIT_PROC is specified, then the function returns true iff we
4263 received input from that process before the timeout elapsed.
4264 Otherwise, return true iff we received input from any process. */
4267 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4268 wait_for_cell
, wait_proc
, just_wait_proc
)
4269 int time_limit
, microsecs
, read_kbd
, do_display
;
4270 Lisp_Object wait_for_cell
;
4271 struct Lisp_Process
*wait_proc
;
4274 register int channel
, nfds
;
4275 SELECT_TYPE Available
;
4276 #ifdef NON_BLOCKING_CONNECT
4277 SELECT_TYPE Connecting
;
4280 int check_delay
, no_avail
;
4283 EMACS_TIME timeout
, end_time
;
4284 int wait_channel
= -1;
4285 int got_some_input
= 0;
4286 int count
= SPECPDL_INDEX ();
4288 FD_ZERO (&Available
);
4289 #ifdef NON_BLOCKING_CONNECT
4290 FD_ZERO (&Connecting
);
4293 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4294 if (wait_proc
!= NULL
)
4295 wait_channel
= XINT (wait_proc
->infd
);
4297 record_unwind_protect (wait_reading_process_output_unwind
,
4298 make_number (waiting_for_user_input_p
));
4299 waiting_for_user_input_p
= read_kbd
;
4301 /* Since we may need to wait several times,
4302 compute the absolute time to return at. */
4303 if (time_limit
|| microsecs
)
4305 EMACS_GET_TIME (end_time
);
4306 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4307 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4309 #ifdef POLL_INTERRUPTED_SYS_CALL
4310 /* AlainF 5-Jul-1996
4311 HP-UX 10.10 seem to have problems with signals coming in
4312 Causes "poll: interrupted system call" messages when Emacs is run
4314 Turn off periodic alarms (in case they are in use),
4315 and then turn off any other atimers. */
4317 turn_on_atimers (0);
4318 #endif /* POLL_INTERRUPTED_SYS_CALL */
4322 int timeout_reduced_for_timers
= 0;
4324 /* If calling from keyboard input, do not quit
4325 since we want to return C-g as an input character.
4326 Otherwise, do pending quit if requested. */
4330 else if (interrupt_input_pending
)
4331 handle_async_input ();
4334 /* Exit now if the cell we're waiting for became non-nil. */
4335 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4338 /* Compute time from now till when time limit is up */
4339 /* Exit if already run out */
4340 if (time_limit
== -1)
4342 /* -1 specified for timeout means
4343 gobble output available now
4344 but don't wait at all. */
4346 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4348 else if (time_limit
|| microsecs
)
4350 EMACS_GET_TIME (timeout
);
4351 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4352 if (EMACS_TIME_NEG_P (timeout
))
4357 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4360 /* Normally we run timers here.
4361 But not if wait_for_cell; in those cases,
4362 the wait is supposed to be short,
4363 and those callers cannot handle running arbitrary Lisp code here. */
4364 if (NILP (wait_for_cell
)
4365 && just_wait_proc
>= 0)
4367 EMACS_TIME timer_delay
;
4371 int old_timers_run
= timers_run
;
4372 struct buffer
*old_buffer
= current_buffer
;
4374 timer_delay
= timer_check (1);
4376 /* If a timer has run, this might have changed buffers
4377 an alike. Make read_key_sequence aware of that. */
4378 if (timers_run
!= old_timers_run
4379 && old_buffer
!= current_buffer
4380 && waiting_for_user_input_p
== -1)
4381 record_asynch_buffer_change ();
4383 if (timers_run
!= old_timers_run
&& do_display
)
4384 /* We must retry, since a timer may have requeued itself
4385 and that could alter the time_delay. */
4386 redisplay_preserve_echo_area (9);
4390 while (!detect_input_pending ());
4392 /* If there is unread keyboard input, also return. */
4394 && requeued_events_pending_p ())
4397 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4399 EMACS_TIME difference
;
4400 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4401 if (EMACS_TIME_NEG_P (difference
))
4403 timeout
= timer_delay
;
4404 timeout_reduced_for_timers
= 1;
4407 /* If time_limit is -1, we are not going to wait at all. */
4408 else if (time_limit
!= -1)
4410 /* This is so a breakpoint can be put here. */
4411 wait_reading_process_output_1 ();
4415 /* Cause C-g and alarm signals to take immediate action,
4416 and cause input available signals to zero out timeout.
4418 It is important that we do this before checking for process
4419 activity. If we get a SIGCHLD after the explicit checks for
4420 process activity, timeout is the only way we will know. */
4422 set_waiting_for_input (&timeout
);
4424 /* If status of something has changed, and no input is
4425 available, notify the user of the change right away. After
4426 this explicit check, we'll let the SIGCHLD handler zap
4427 timeout to get our attention. */
4428 if (update_tick
!= process_tick
&& do_display
)
4431 #ifdef NON_BLOCKING_CONNECT
4435 Atemp
= input_wait_mask
;
4437 /* On Mac OS X 10.0, the SELECT system call always says input is
4438 present (for reading) at stdin, even when none is. This
4439 causes the call to SELECT below to return 1 and
4440 status_notify not to be called. As a result output of
4441 subprocesses are incorrectly discarded.
4445 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4447 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4448 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
4450 #ifdef NON_BLOCKING_CONNECT
4451 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4455 (SELECT_TYPE
*)0, &timeout
)
4458 /* It's okay for us to do this and then continue with
4459 the loop, since timeout has already been zeroed out. */
4460 clear_waiting_for_input ();
4461 status_notify (NULL
);
4465 /* Don't wait for output from a non-running process. Just
4466 read whatever data has already been received. */
4467 if (wait_proc
&& wait_proc
->raw_status_new
)
4468 update_status (wait_proc
);
4470 && ! EQ (wait_proc
->status
, Qrun
)
4471 && ! EQ (wait_proc
->status
, Qconnect
))
4473 int nread
, total_nread
= 0;
4475 clear_waiting_for_input ();
4476 XSETPROCESS (proc
, wait_proc
);
4478 /* Read data from the process, until we exhaust it. */
4479 while (XINT (wait_proc
->infd
) >= 0)
4481 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
4487 total_nread
+= nread
;
4489 else if (nread
== -1 && EIO
== errno
)
4493 else if (nread
== -1 && EAGAIN
== errno
)
4497 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4501 if (total_nread
> 0 && do_display
)
4502 redisplay_preserve_echo_area (10);
4507 /* Wait till there is something to do */
4509 if (wait_proc
&& just_wait_proc
)
4511 if (XINT (wait_proc
->infd
) < 0) /* Terminated */
4513 FD_SET (XINT (wait_proc
->infd
), &Available
);
4515 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4517 else if (!NILP (wait_for_cell
))
4519 Available
= non_process_wait_mask
;
4521 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4526 Available
= non_keyboard_wait_mask
;
4528 Available
= input_wait_mask
;
4529 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4530 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4533 /* If frame size has changed or the window is newly mapped,
4534 redisplay now, before we start to wait. There is a race
4535 condition here; if a SIGIO arrives between now and the select
4536 and indicates that a frame is trashed, the select may block
4537 displaying a trashed screen. */
4538 if (frame_garbaged
&& do_display
)
4540 clear_waiting_for_input ();
4541 redisplay_preserve_echo_area (11);
4543 set_waiting_for_input (&timeout
);
4547 if (read_kbd
&& detect_input_pending ())
4554 #ifdef NON_BLOCKING_CONNECT
4556 Connecting
= connect_wait_mask
;
4559 #ifdef ADAPTIVE_READ_BUFFERING
4560 /* Set the timeout for adaptive read buffering if any
4561 process has non-nil read_output_skip and non-zero
4562 read_output_delay, and we are not reading output for a
4563 specific wait_channel. It is not executed if
4564 Vprocess_adaptive_read_buffering is nil. */
4565 if (process_output_skip
&& check_delay
> 0)
4567 int usecs
= EMACS_USECS (timeout
);
4568 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4569 usecs
= READ_OUTPUT_DELAY_MAX
;
4570 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4572 proc
= chan_process
[channel
];
4575 /* Find minimum non-zero read_output_delay among the
4576 processes with non-nil read_output_skip. */
4577 if (XINT (XPROCESS (proc
)->read_output_delay
) > 0)
4580 if (NILP (XPROCESS (proc
)->read_output_skip
))
4582 FD_CLR (channel
, &Available
);
4583 XPROCESS (proc
)->read_output_skip
= Qnil
;
4584 if (XINT (XPROCESS (proc
)->read_output_delay
) < usecs
)
4585 usecs
= XINT (XPROCESS (proc
)->read_output_delay
);
4588 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4589 process_output_skip
= 0;
4593 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
4595 #ifdef NON_BLOCKING_CONNECT
4596 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4600 (SELECT_TYPE
*)0, &timeout
);
4605 /* Make C-g and alarm signals set flags again */
4606 clear_waiting_for_input ();
4608 /* If we woke up due to SIGWINCH, actually change size now. */
4609 do_pending_window_change (0);
4611 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4612 /* We wanted the full specified time, so return now. */
4616 if (xerrno
== EINTR
)
4619 /* Ultrix select seems to return ENOMEM when it is
4620 interrupted. Treat it just like EINTR. Bleah. Note
4621 that we want to test for the "ultrix" CPP symbol, not
4622 "__ultrix__"; the latter is only defined under GCC, but
4623 not by DEC's bundled CC. -JimB */
4624 else if (xerrno
== ENOMEM
)
4628 /* This happens for no known reason on ALLIANT.
4629 I am guessing that this is the right response. -- RMS. */
4630 else if (xerrno
== EFAULT
)
4633 else if (xerrno
== EBADF
)
4636 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4637 the child's closure of the pts gives the parent a SIGHUP, and
4638 the ptc file descriptor is automatically closed,
4639 yielding EBADF here or at select() call above.
4640 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4641 in m/ibmrt-aix.h), and here we just ignore the select error.
4642 Cleanup occurs c/o status_notify after SIGCLD. */
4643 no_avail
= 1; /* Cannot depend on values returned */
4649 error ("select error: %s", emacs_strerror (xerrno
));
4654 FD_ZERO (&Available
);
4655 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4658 #if defined(sun) && !defined(USG5_4)
4659 if (nfds
> 0 && keyboard_bit_set (&Available
)
4661 /* System sometimes fails to deliver SIGIO.
4663 David J. Mackenzie says that Emacs doesn't compile under
4664 Solaris if this code is enabled, thus the USG5_4 in the CPP
4665 conditional. "I haven't noticed any ill effects so far.
4666 If you find a Solaris expert somewhere, they might know
4668 kill (getpid (), SIGIO
);
4671 #if 0 /* When polling is used, interrupt_input is 0,
4672 so get_input_pending should read the input.
4673 So this should not be needed. */
4674 /* If we are using polling for input,
4675 and we see input available, make it get read now.
4676 Otherwise it might not actually get read for a second.
4677 And on hpux, since we turn off polling in wait_reading_process_output,
4678 it might never get read at all if we don't spend much time
4679 outside of wait_reading_process_output. */
4680 if (read_kbd
&& interrupt_input
4681 && keyboard_bit_set (&Available
)
4682 && input_polling_used ())
4683 kill (getpid (), SIGALRM
);
4686 /* Check for keyboard input */
4687 /* If there is any, return immediately
4688 to give it higher priority than subprocesses */
4692 int old_timers_run
= timers_run
;
4693 struct buffer
*old_buffer
= current_buffer
;
4696 if (detect_input_pending_run_timers (do_display
))
4698 swallow_events (do_display
);
4699 if (detect_input_pending_run_timers (do_display
))
4703 /* If a timer has run, this might have changed buffers
4704 an alike. Make read_key_sequence aware of that. */
4705 if (timers_run
!= old_timers_run
4706 && waiting_for_user_input_p
== -1
4707 && old_buffer
!= current_buffer
)
4708 record_asynch_buffer_change ();
4714 /* If there is unread keyboard input, also return. */
4716 && requeued_events_pending_p ())
4719 /* If we are not checking for keyboard input now,
4720 do process events (but don't run any timers).
4721 This is so that X events will be processed.
4722 Otherwise they may have to wait until polling takes place.
4723 That would causes delays in pasting selections, for example.
4725 (We used to do this only if wait_for_cell.) */
4726 if (read_kbd
== 0 && detect_input_pending ())
4728 swallow_events (do_display
);
4729 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4730 if (detect_input_pending ())
4735 /* Exit now if the cell we're waiting for became non-nil. */
4736 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4740 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4741 go read it. This can happen with X on BSD after logging out.
4742 In that case, there really is no input and no SIGIO,
4743 but select says there is input. */
4745 if (read_kbd
&& interrupt_input
4746 && keyboard_bit_set (&Available
) && ! noninteractive
)
4747 kill (getpid (), SIGIO
);
4751 got_some_input
|= nfds
> 0;
4753 /* If checking input just got us a size-change event from X,
4754 obey it now if we should. */
4755 if (read_kbd
|| ! NILP (wait_for_cell
))
4756 do_pending_window_change (0);
4758 /* Check for data from a process. */
4759 if (no_avail
|| nfds
== 0)
4762 /* Really FIRST_PROC_DESC should be 0 on Unix,
4763 but this is safer in the short run. */
4764 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4766 if (FD_ISSET (channel
, &Available
)
4767 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4771 /* If waiting for this channel, arrange to return as
4772 soon as no more input to be processed. No more
4774 if (wait_channel
== channel
)
4780 proc
= chan_process
[channel
];
4784 /* If this is a server stream socket, accept connection. */
4785 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4787 server_accept_connection (proc
, channel
);
4791 /* Read data from the process, starting with our
4792 buffered-ahead character if we have one. */
4794 nread
= read_process_output (proc
, channel
);
4797 /* Since read_process_output can run a filter,
4798 which can call accept-process-output,
4799 don't try to read from any other processes
4800 before doing the select again. */
4801 FD_ZERO (&Available
);
4804 redisplay_preserve_echo_area (12);
4807 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4810 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4811 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4813 else if (nread
== -1 && errno
== EAGAIN
)
4817 else if (nread
== -1 && errno
== EAGAIN
)
4819 /* Note that we cannot distinguish between no input
4820 available now and a closed pipe.
4821 With luck, a closed pipe will be accompanied by
4822 subprocess termination and SIGCHLD. */
4823 else if (nread
== 0 && !NETCONN_P (proc
))
4825 #endif /* O_NDELAY */
4826 #endif /* O_NONBLOCK */
4828 /* On some OSs with ptys, when the process on one end of
4829 a pty exits, the other end gets an error reading with
4830 errno = EIO instead of getting an EOF (0 bytes read).
4831 Therefore, if we get an error reading and errno =
4832 EIO, just continue, because the child process has
4833 exited and should clean itself up soon (e.g. when we
4836 However, it has been known to happen that the SIGCHLD
4837 got lost. So raise the signal again just in case.
4839 else if (nread
== -1 && errno
== EIO
)
4841 /* Clear the descriptor now, so we only raise the signal once. */
4842 FD_CLR (channel
, &input_wait_mask
);
4843 FD_CLR (channel
, &non_keyboard_wait_mask
);
4845 kill (getpid (), SIGCHLD
);
4847 #endif /* HAVE_PTYS */
4848 /* If we can detect process termination, don't consider the process
4849 gone just because its pipe is closed. */
4851 else if (nread
== 0 && !NETCONN_P (proc
))
4856 /* Preserve status of processes already terminated. */
4857 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4858 deactivate_process (proc
);
4859 if (XPROCESS (proc
)->raw_status_new
)
4860 update_status (XPROCESS (proc
));
4861 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4862 XPROCESS (proc
)->status
4863 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4866 #ifdef NON_BLOCKING_CONNECT
4867 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4868 && FD_ISSET (channel
, &connect_wait_mask
))
4870 struct Lisp_Process
*p
;
4872 FD_CLR (channel
, &connect_wait_mask
);
4873 if (--num_pending_connects
< 0)
4876 proc
= chan_process
[channel
];
4880 p
= XPROCESS (proc
);
4883 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4884 So only use it on systems where it is known to work. */
4886 int xlen
= sizeof(xerrno
);
4887 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4892 struct sockaddr pname
;
4893 int pnamelen
= sizeof(pname
);
4895 /* If connection failed, getpeername will fail. */
4897 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4899 /* Obtain connect failure code through error slippage. */
4902 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4909 XSETINT (p
->tick
, ++process_tick
);
4910 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4911 deactivate_process (proc
);
4916 /* Execute the sentinel here. If we had relied on
4917 status_notify to do it later, it will read input
4918 from the process before calling the sentinel. */
4919 exec_sentinel (proc
, build_string ("open\n"));
4920 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4922 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4923 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4927 #endif /* NON_BLOCKING_CONNECT */
4928 } /* end for each file descriptor */
4929 } /* end while exit conditions not met */
4931 unbind_to (count
, Qnil
);
4933 /* If calling from keyboard input, do not quit
4934 since we want to return C-g as an input character.
4935 Otherwise, do pending quit if requested. */
4938 /* Prevent input_pending from remaining set if we quit. */
4939 clear_input_pending ();
4942 #ifdef POLL_INTERRUPTED_SYS_CALL
4943 /* AlainF 5-Jul-1996
4944 HP-UX 10.10 seems to have problems with signals coming in
4945 Causes "poll: interrupted system call" messages when Emacs is run
4947 Turn periodic alarms back on */
4949 #endif /* POLL_INTERRUPTED_SYS_CALL */
4951 return got_some_input
;
4954 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4957 read_process_output_call (fun_and_args
)
4958 Lisp_Object fun_and_args
;
4960 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4964 read_process_output_error_handler (error
)
4967 cmd_error_internal (error
, "error in process filter: ");
4969 update_echo_area ();
4970 Fsleep_for (make_number (2), Qnil
);
4974 /* Read pending output from the process channel,
4975 starting with our buffered-ahead character if we have one.
4976 Yield number of decoded characters read.
4978 This function reads at most 4096 characters.
4979 If you want to read all available subprocess output,
4980 you must call it repeatedly until it returns zero.
4982 The characters read are decoded according to PROC's coding-system
4986 read_process_output (proc
, channel
)
4988 register int channel
;
4990 register int nbytes
;
4992 register Lisp_Object outstream
;
4993 register struct buffer
*old
= current_buffer
;
4994 register struct Lisp_Process
*p
= XPROCESS (proc
);
4995 register int opoint
;
4996 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4997 int carryover
= XINT (p
->decoding_carryover
);
5001 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5003 vs
= get_vms_process_pointer (p
->pid
);
5007 return (0); /* Really weird if it does this */
5008 if (!(vs
->iosb
[0] & 1))
5009 return -1; /* I/O error */
5012 error ("Could not get VMS process pointer");
5013 chars
= vs
->inputBuffer
;
5014 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
5017 start_vms_process_read (vs
); /* Crank up the next read on the process */
5018 return 1; /* Nothing worth printing, say we got 1 */
5022 /* The data carried over in the previous decoding (which are at
5023 the tail of decoding buffer) should be prepended to the new
5024 data read to decode all together. */
5025 chars
= (char *) alloca (nbytes
+ carryover
);
5026 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
5027 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
5031 chars
= (char *) alloca (carryover
+ readmax
);
5033 /* See the comment above. */
5034 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
5036 #ifdef DATAGRAM_SOCKETS
5037 /* We have a working select, so proc_buffered_char is always -1. */
5038 if (DATAGRAM_CHAN_P (channel
))
5040 int len
= datagram_address
[channel
].len
;
5041 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5042 0, datagram_address
[channel
].sa
, &len
);
5046 if (proc_buffered_char
[channel
] < 0)
5048 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5049 #ifdef ADAPTIVE_READ_BUFFERING
5050 if (nbytes
> 0 && !NILP (p
->adaptive_read_buffering
))
5052 int delay
= XINT (p
->read_output_delay
);
5055 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5058 process_output_delay_count
++;
5059 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5062 else if (delay
> 0 && (nbytes
== readmax
))
5064 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5066 process_output_delay_count
--;
5068 XSETINT (p
->read_output_delay
, delay
);
5071 p
->read_output_skip
= Qt
;
5072 process_output_skip
= 1;
5079 chars
[carryover
] = proc_buffered_char
[channel
];
5080 proc_buffered_char
[channel
] = -1;
5081 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5085 nbytes
= nbytes
+ 1;
5087 #endif /* not VMS */
5089 XSETINT (p
->decoding_carryover
, 0);
5091 /* At this point, NBYTES holds number of bytes just received
5092 (including the one in proc_buffered_char[channel]). */
5095 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5097 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5100 /* Now set NBYTES how many bytes we must decode. */
5101 nbytes
+= carryover
;
5103 /* Read and dispose of the process output. */
5104 outstream
= p
->filter
;
5105 if (!NILP (outstream
))
5107 /* We inhibit quit here instead of just catching it so that
5108 hitting ^G when a filter happens to be running won't screw
5110 int count
= SPECPDL_INDEX ();
5111 Lisp_Object odeactivate
;
5112 Lisp_Object obuffer
, okeymap
;
5114 int outer_running_asynch_code
= running_asynch_code
;
5115 int waiting
= waiting_for_user_input_p
;
5117 /* No need to gcpro these, because all we do with them later
5118 is test them for EQness, and none of them should be a string. */
5119 odeactivate
= Vdeactivate_mark
;
5120 XSETBUFFER (obuffer
, current_buffer
);
5121 okeymap
= current_buffer
->keymap
;
5123 specbind (Qinhibit_quit
, Qt
);
5124 specbind (Qlast_nonmenu_event
, Qt
);
5126 /* In case we get recursively called,
5127 and we already saved the match data nonrecursively,
5128 save the same match data in safely recursive fashion. */
5129 if (outer_running_asynch_code
)
5132 /* Don't clobber the CURRENT match data, either! */
5133 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5134 restore_search_regs ();
5135 record_unwind_save_match_data ();
5136 Fset_match_data (tem
, Qt
);
5139 /* For speed, if a search happens within this code,
5140 save the match data in a special nonrecursive fashion. */
5141 running_asynch_code
= 1;
5143 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5145 Vlast_coding_system_used
= coding
->symbol
;
5146 /* A new coding system might be found. */
5147 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5149 p
->decode_coding_system
= coding
->symbol
;
5151 /* Don't call setup_coding_system for
5152 proc_decode_coding_system[channel] here. It is done in
5153 detect_coding called via decode_coding above. */
5155 /* If a coding system for encoding is not yet decided, we set
5156 it as the same as coding-system for decoding.
5158 But, before doing that we must check if
5159 proc_encode_coding_system[p->outfd] surely points to a
5160 valid memory because p->outfd will be changed once EOF is
5161 sent to the process. */
5162 if (NILP (p
->encode_coding_system
)
5163 && proc_encode_coding_system
[XINT (p
->outfd
)])
5165 p
->encode_coding_system
= coding
->symbol
;
5166 setup_coding_system (coding
->symbol
,
5167 proc_encode_coding_system
[XINT (p
->outfd
)]);
5168 if (proc_encode_coding_system
[XINT (p
->outfd
)]->eol_type
5169 == CODING_EOL_UNDECIDED
)
5170 proc_encode_coding_system
[XINT (p
->outfd
)]->eol_type
5175 carryover
= nbytes
- coding
->consumed
;
5179 if (SCHARS (p
->decoding_buf
) < carryover
)
5180 p
->decoding_buf
= make_uninit_string (carryover
);
5181 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5183 XSETINT (p
->decoding_carryover
, carryover
);
5184 /* Adjust the multibyteness of TEXT to that of the filter. */
5185 if (NILP (p
->filter_multibyte
) != ! STRING_MULTIBYTE (text
))
5186 text
= (STRING_MULTIBYTE (text
)
5187 ? Fstring_as_unibyte (text
)
5188 : Fstring_to_multibyte (text
));
5189 if (SBYTES (text
) > 0)
5190 internal_condition_case_1 (read_process_output_call
,
5192 Fcons (proc
, Fcons (text
, Qnil
))),
5193 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5194 read_process_output_error_handler
);
5196 /* If we saved the match data nonrecursively, restore it now. */
5197 restore_search_regs ();
5198 running_asynch_code
= outer_running_asynch_code
;
5200 /* Handling the process output should not deactivate the mark. */
5201 Vdeactivate_mark
= odeactivate
;
5203 /* Restore waiting_for_user_input_p as it was
5204 when we were called, in case the filter clobbered it. */
5205 waiting_for_user_input_p
= waiting
;
5207 #if 0 /* Call record_asynch_buffer_change unconditionally,
5208 because we might have changed minor modes or other things
5209 that affect key bindings. */
5210 if (! EQ (Fcurrent_buffer (), obuffer
)
5211 || ! EQ (current_buffer
->keymap
, okeymap
))
5213 /* But do it only if the caller is actually going to read events.
5214 Otherwise there's no need to make him wake up, and it could
5215 cause trouble (for example it would make sit_for return). */
5216 if (waiting_for_user_input_p
== -1)
5217 record_asynch_buffer_change ();
5220 start_vms_process_read (vs
);
5222 unbind_to (count
, Qnil
);
5226 /* If no filter, write into buffer if it isn't dead. */
5227 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
5229 Lisp_Object old_read_only
;
5230 int old_begv
, old_zv
;
5231 int old_begv_byte
, old_zv_byte
;
5232 Lisp_Object odeactivate
;
5233 int before
, before_byte
;
5238 odeactivate
= Vdeactivate_mark
;
5240 Fset_buffer (p
->buffer
);
5242 opoint_byte
= PT_BYTE
;
5243 old_read_only
= current_buffer
->read_only
;
5246 old_begv_byte
= BEGV_BYTE
;
5247 old_zv_byte
= ZV_BYTE
;
5249 current_buffer
->read_only
= Qnil
;
5251 /* Insert new output into buffer
5252 at the current end-of-output marker,
5253 thus preserving logical ordering of input and output. */
5254 if (XMARKER (p
->mark
)->buffer
)
5255 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5256 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5259 SET_PT_BOTH (ZV
, ZV_BYTE
);
5261 before_byte
= PT_BYTE
;
5263 /* If the output marker is outside of the visible region, save
5264 the restriction and widen. */
5265 if (! (BEGV
<= PT
&& PT
<= ZV
))
5268 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5270 Vlast_coding_system_used
= coding
->symbol
;
5271 /* A new coding system might be found. See the comment in the
5272 similar code in the previous `if' block. */
5273 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5275 p
->decode_coding_system
= coding
->symbol
;
5276 if (NILP (p
->encode_coding_system
)
5277 && proc_encode_coding_system
[XINT (p
->outfd
)])
5279 p
->encode_coding_system
= coding
->symbol
;
5280 setup_coding_system (coding
->symbol
,
5281 proc_encode_coding_system
[XINT (p
->outfd
)]);
5282 if (proc_encode_coding_system
[XINT (p
->outfd
)]->eol_type
5283 == CODING_EOL_UNDECIDED
)
5284 proc_encode_coding_system
[XINT (p
->outfd
)]->eol_type
5288 carryover
= nbytes
- coding
->consumed
;
5292 if (SCHARS (p
->decoding_buf
) < carryover
)
5293 p
->decoding_buf
= make_uninit_string (carryover
);
5294 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5296 XSETINT (p
->decoding_carryover
, carryover
);
5298 /* Adjust the multibyteness of TEXT to that of the buffer. */
5299 if (NILP (current_buffer
->enable_multibyte_characters
)
5300 != ! STRING_MULTIBYTE (text
))
5301 text
= (STRING_MULTIBYTE (text
)
5302 ? Fstring_as_unibyte (text
)
5303 : Fstring_to_multibyte (text
));
5304 /* Insert before markers in case we are inserting where
5305 the buffer's mark is, and the user's next command is Meta-y. */
5306 insert_from_string_before_markers (text
, 0, 0,
5307 SCHARS (text
), SBYTES (text
), 0);
5309 /* Make sure the process marker's position is valid when the
5310 process buffer is changed in the signal_after_change above.
5311 W3 is known to do that. */
5312 if (BUFFERP (p
->buffer
)
5313 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5314 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5316 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5318 update_mode_lines
++;
5320 /* Make sure opoint and the old restrictions
5321 float ahead of any new text just as point would. */
5322 if (opoint
>= before
)
5324 opoint
+= PT
- before
;
5325 opoint_byte
+= PT_BYTE
- before_byte
;
5327 if (old_begv
> before
)
5329 old_begv
+= PT
- before
;
5330 old_begv_byte
+= PT_BYTE
- before_byte
;
5332 if (old_zv
>= before
)
5334 old_zv
+= PT
- before
;
5335 old_zv_byte
+= PT_BYTE
- before_byte
;
5338 /* If the restriction isn't what it should be, set it. */
5339 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5340 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5342 /* Handling the process output should not deactivate the mark. */
5343 Vdeactivate_mark
= odeactivate
;
5345 current_buffer
->read_only
= old_read_only
;
5346 SET_PT_BOTH (opoint
, opoint_byte
);
5347 set_buffer_internal (old
);
5350 start_vms_process_read (vs
);
5355 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5357 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5358 This is intended for use by asynchronous process output filters and sentinels. */)
5361 return (waiting_for_user_input_p
? Qt
: Qnil
);
5364 /* Sending data to subprocess */
5366 jmp_buf send_process_frame
;
5367 Lisp_Object process_sent_to
;
5370 send_process_trap ()
5372 SIGNAL_THREAD_CHECK (SIGPIPE
);
5377 sigunblock (sigmask (SIGPIPE
));
5378 longjmp (send_process_frame
, 1);
5381 /* Send some data to process PROC.
5382 BUF is the beginning of the data; LEN is the number of characters.
5383 OBJECT is the Lisp object that the data comes from. If OBJECT is
5384 nil or t, it means that the data comes from C string.
5386 If OBJECT is not nil, the data is encoded by PROC's coding-system
5387 for encoding before it is sent.
5389 This function can evaluate Lisp code and can garbage collect. */
5392 send_process (proc
, buf
, len
, object
)
5393 volatile Lisp_Object proc
;
5394 unsigned char *volatile buf
;
5396 volatile Lisp_Object object
;
5398 /* Use volatile to protect variables from being clobbered by longjmp. */
5399 struct Lisp_Process
*p
= XPROCESS (proc
);
5401 struct coding_system
*coding
;
5402 struct gcpro gcpro1
;
5403 SIGTYPE (*volatile old_sigpipe
) ();
5408 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5411 if (p
->raw_status_new
)
5413 if (! EQ (p
->status
, Qrun
))
5414 error ("Process %s not running", SDATA (p
->name
));
5415 if (XINT (p
->outfd
) < 0)
5416 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5418 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5419 Vlast_coding_system_used
= coding
->symbol
;
5421 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5422 || (BUFFERP (object
)
5423 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5426 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5427 /* The coding system for encoding was changed to raw-text
5428 because we sent a unibyte text previously. Now we are
5429 sending a multibyte text, thus we must encode it by the
5430 original coding system specified for the current process. */
5431 setup_coding_system (p
->encode_coding_system
, coding
);
5432 if (coding
->eol_type
== CODING_EOL_UNDECIDED
)
5433 coding
->eol_type
= system_eol_type
;
5434 /* src_multibyte should be set to 1 _after_ a call to
5435 setup_coding_system, since it resets src_multibyte to
5437 coding
->src_multibyte
= 1;
5441 /* For sending a unibyte text, character code conversion should
5442 not take place but EOL conversion should. So, setup raw-text
5443 or one of the subsidiary if we have not yet done it. */
5444 if (coding
->type
!= coding_type_raw_text
)
5446 if (CODING_REQUIRE_FLUSHING (coding
))
5448 /* But, before changing the coding, we must flush out data. */
5449 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5450 send_process (proc
, "", 0, Qt
);
5452 coding
->src_multibyte
= 0;
5453 setup_raw_text_coding_system (coding
);
5456 coding
->dst_multibyte
= 0;
5458 if (CODING_REQUIRE_ENCODING (coding
))
5460 int require
= encoding_buffer_size (coding
, len
);
5461 int from_byte
= -1, from
= -1, to
= -1;
5463 if (BUFFERP (object
))
5465 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5466 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5467 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5469 else if (STRINGP (object
))
5471 from_byte
= buf
- SDATA (object
);
5472 from
= string_byte_to_char (object
, from_byte
);
5473 to
= string_byte_to_char (object
, from_byte
+ len
);
5476 if (coding
->composing
!= COMPOSITION_DISABLED
)
5479 coding_save_composition (coding
, from
, to
, object
);
5481 coding
->composing
= COMPOSITION_DISABLED
;
5484 if (SBYTES (p
->encoding_buf
) < require
)
5485 p
->encoding_buf
= make_uninit_string (require
);
5488 buf
= (BUFFERP (object
)
5489 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5490 : SDATA (object
) + from_byte
);
5492 object
= p
->encoding_buf
;
5493 encode_coding (coding
, (char *) buf
, SDATA (object
),
5494 len
, SBYTES (object
));
5495 coding_free_composition_data (coding
);
5496 len
= coding
->produced
;
5497 buf
= SDATA (object
);
5501 vs
= get_vms_process_pointer (p
->pid
);
5503 error ("Could not find this process: %x", p
->pid
);
5504 else if (write_to_vms_process (vs
, buf
, len
))
5508 if (pty_max_bytes
== 0)
5510 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5511 pty_max_bytes
= fpathconf (XFASTINT (p
->outfd
), _PC_MAX_CANON
);
5512 if (pty_max_bytes
< 0)
5513 pty_max_bytes
= 250;
5515 pty_max_bytes
= 250;
5517 /* Deduct one, to leave space for the eof. */
5521 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5522 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5523 when returning with longjmp despite being declared volatile. */
5524 if (!setjmp (send_process_frame
))
5526 process_sent_to
= proc
;
5531 /* Decide how much data we can send in one batch.
5532 Long lines need to be split into multiple batches. */
5533 if (!NILP (p
->pty_flag
))
5535 /* Starting this at zero is always correct when not the first
5536 iteration because the previous iteration ended by sending C-d.
5537 It may not be correct for the first iteration
5538 if a partial line was sent in a separate send_process call.
5539 If that proves worth handling, we need to save linepos
5540 in the process object. */
5542 unsigned char *ptr
= (unsigned char *) buf
;
5543 unsigned char *end
= (unsigned char *) buf
+ len
;
5545 /* Scan through this text for a line that is too long. */
5546 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5554 /* If we found one, break the line there
5555 and put in a C-d to force the buffer through. */
5559 /* Send this batch, using one or more write calls. */
5562 int outfd
= XINT (p
->outfd
);
5563 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5564 #ifdef DATAGRAM_SOCKETS
5565 if (DATAGRAM_CHAN_P (outfd
))
5567 rv
= sendto (outfd
, (char *) buf
, this,
5568 0, datagram_address
[outfd
].sa
,
5569 datagram_address
[outfd
].len
);
5570 if (rv
< 0 && errno
== EMSGSIZE
)
5572 signal (SIGPIPE
, old_sigpipe
);
5573 report_file_error ("sending datagram",
5574 Fcons (proc
, Qnil
));
5580 rv
= emacs_write (outfd
, (char *) buf
, this);
5581 #ifdef ADAPTIVE_READ_BUFFERING
5582 if (XINT (p
->read_output_delay
) > 0
5583 && EQ (p
->adaptive_read_buffering
, Qt
))
5585 XSETFASTINT (p
->read_output_delay
, 0);
5586 process_output_delay_count
--;
5587 p
->read_output_skip
= Qnil
;
5591 signal (SIGPIPE
, old_sigpipe
);
5597 || errno
== EWOULDBLOCK
5603 /* Buffer is full. Wait, accepting input;
5604 that may allow the program
5605 to finish doing output and read more. */
5609 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5610 /* A gross hack to work around a bug in FreeBSD.
5611 In the following sequence, read(2) returns
5615 write(2) 954 bytes, get EAGAIN
5616 read(2) 1024 bytes in process_read_output
5617 read(2) 11 bytes in process_read_output
5619 That is, read(2) returns more bytes than have
5620 ever been written successfully. The 1033 bytes
5621 read are the 1022 bytes written successfully
5622 after processing (for example with CRs added if
5623 the terminal is set up that way which it is
5624 here). The same bytes will be seen again in a
5625 later read(2), without the CRs. */
5627 if (errno
== EAGAIN
)
5630 ioctl (XINT (p
->outfd
), TIOCFLUSH
, &flags
);
5632 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5634 /* Running filters might relocate buffers or strings.
5635 Arrange to relocate BUF. */
5636 if (BUFFERP (object
))
5637 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5638 else if (STRINGP (object
))
5639 offset
= buf
- SDATA (object
);
5641 #ifdef EMACS_HAS_USECS
5642 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5644 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5647 if (BUFFERP (object
))
5648 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5649 else if (STRINGP (object
))
5650 buf
= offset
+ SDATA (object
);
5655 /* This is a real error. */
5656 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5663 /* If we sent just part of the string, put in an EOF
5664 to force it through, before we send the rest. */
5666 Fprocess_send_eof (proc
);
5669 #endif /* not VMS */
5672 signal (SIGPIPE
, old_sigpipe
);
5674 proc
= process_sent_to
;
5675 p
= XPROCESS (proc
);
5677 p
->raw_status_new
= 0;
5678 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5679 XSETINT (p
->tick
, ++process_tick
);
5680 deactivate_process (proc
);
5682 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5684 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5692 send_process_object_unwind (buf
)
5697 if (XBUFFER (buf
) == current_buffer
)
5699 tembuf
= Fcurrent_buffer ();
5701 Fkill_buffer (tembuf
);
5705 /* Send current contents of region between START and END to PROC.
5706 If START is a string, send it instead.
5707 This function can evaluate Lisp code and can garbage collect. */
5710 send_process_object (proc
, start
, end
)
5711 Lisp_Object proc
, start
, end
;
5713 int count
= SPECPDL_INDEX ();
5714 Lisp_Object object
= STRINGP (start
) ? start
: Fcurrent_buffer ();
5715 struct buffer
*given_buffer
= current_buffer
;
5719 record_unwind_protect (send_process_object_unwind
, Fcurrent_buffer ());
5721 if (STRINGP (object
) ? STRING_MULTIBYTE (object
)
5722 : ! NILP (XBUFFER (object
)->enable_multibyte_characters
))
5724 struct Lisp_Process
*p
= XPROCESS (proc
);
5725 struct coding_system
*coding
;
5727 if (p
->raw_status_new
)
5729 if (! EQ (p
->status
, Qrun
))
5730 error ("Process %s not running", SDATA (p
->name
));
5731 if (XINT (p
->outfd
) < 0)
5732 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5734 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5735 if (! EQ (coding
->symbol
, p
->encode_coding_system
))
5736 /* The coding system for encoding was changed to raw-text
5737 because we sent a unibyte text previously. Now we are
5738 sending a multibyte text, thus we must encode it by the
5739 original coding system specified for the current process. */
5740 setup_coding_system (p
->encode_coding_system
, coding
);
5741 if (! NILP (coding
->pre_write_conversion
))
5743 struct gcpro gcpro1
, gcpro2
;
5745 GCPRO2 (proc
, object
);
5746 call2 (coding
->pre_write_conversion
, start
, end
);
5748 if (given_buffer
!= current_buffer
)
5750 start
= make_number (BEGV
), end
= make_number (ZV
);
5751 object
= Fcurrent_buffer ();
5756 if (BUFFERP (object
))
5758 EMACS_INT start_byte
;
5760 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5761 move_gap (XINT (end
));
5762 start_byte
= CHAR_TO_BYTE (XINT (start
));
5763 buf
= BYTE_POS_ADDR (start_byte
);
5764 len
= CHAR_TO_BYTE (XINT (end
)) - start_byte
;
5768 buf
= SDATA (object
);
5769 len
= SBYTES (object
);
5771 send_process (proc
, buf
, len
, object
);
5773 unbind_to (count
, Qnil
);
5776 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5778 doc
: /* Send current contents of region as input to PROCESS.
5779 PROCESS may be a process, a buffer, the name of a process or buffer, or
5780 nil, indicating the current buffer's process.
5781 Called from program, takes three arguments, PROCESS, START and END.
5782 If the region is more than 500 characters long,
5783 it is sent in several bunches. This may happen even for shorter regions.
5784 Output from processes can arrive in between bunches. */)
5785 (process
, start
, end
)
5786 Lisp_Object process
, start
, end
;
5790 proc
= get_process (process
);
5791 validate_region (&start
, &end
);
5792 send_process_object (proc
, start
, end
);
5796 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5798 doc
: /* Send PROCESS the contents of STRING as input.
5799 PROCESS may be a process, a buffer, the name of a process or buffer, or
5800 nil, indicating the current buffer's process.
5801 If STRING is more than 500 characters long,
5802 it is sent in several bunches. This may happen even for shorter strings.
5803 Output from processes can arrive in between bunches. */)
5805 Lisp_Object process
, string
;
5808 CHECK_STRING (string
);
5809 proc
= get_process (process
);
5810 send_process_object (proc
, string
, Qnil
);
5814 /* Return the foreground process group for the tty/pty that
5815 the process P uses. */
5817 emacs_get_tty_pgrp (p
)
5818 struct Lisp_Process
*p
;
5823 if (ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5826 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5827 master side. Try the slave side. */
5828 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5832 ioctl (fd
, TIOCGPGRP
, &gid
);
5836 #endif /* defined (TIOCGPGRP ) */
5841 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5842 Sprocess_running_child_p
, 0, 1, 0,
5843 doc
: /* Return t if PROCESS has given the terminal to a child.
5844 If the operating system does not make it possible to find out,
5845 return t unconditionally. */)
5847 Lisp_Object process
;
5849 /* Initialize in case ioctl doesn't exist or gives an error,
5850 in a way that will cause returning t. */
5853 struct Lisp_Process
*p
;
5855 proc
= get_process (process
);
5856 p
= XPROCESS (proc
);
5858 if (!EQ (p
->childp
, Qt
))
5859 error ("Process %s is not a subprocess",
5861 if (XINT (p
->infd
) < 0)
5862 error ("Process %s is not active",
5865 gid
= emacs_get_tty_pgrp (p
);
5872 /* send a signal number SIGNO to PROCESS.
5873 If CURRENT_GROUP is t, that means send to the process group
5874 that currently owns the terminal being used to communicate with PROCESS.
5875 This is used for various commands in shell mode.
5876 If CURRENT_GROUP is lambda, that means send to the process group
5877 that currently owns the terminal, but only if it is NOT the shell itself.
5879 If NOMSG is zero, insert signal-announcements into process's buffers
5882 If we can, we try to signal PROCESS by sending control characters
5883 down the pty. This allows us to signal inferiors who have changed
5884 their uid, for which killpg would return an EPERM error. */
5887 process_send_signal (process
, signo
, current_group
, nomsg
)
5888 Lisp_Object process
;
5890 Lisp_Object current_group
;
5894 register struct Lisp_Process
*p
;
5898 proc
= get_process (process
);
5899 p
= XPROCESS (proc
);
5901 if (!EQ (p
->childp
, Qt
))
5902 error ("Process %s is not a subprocess",
5904 if (XINT (p
->infd
) < 0)
5905 error ("Process %s is not active",
5908 if (NILP (p
->pty_flag
))
5909 current_group
= Qnil
;
5911 /* If we are using pgrps, get a pgrp number and make it negative. */
5912 if (NILP (current_group
))
5913 /* Send the signal to the shell's process group. */
5917 #ifdef SIGNALS_VIA_CHARACTERS
5918 /* If possible, send signals to the entire pgrp
5919 by sending an input character to it. */
5921 /* TERMIOS is the latest and bestest, and seems most likely to
5922 work. If the system has it, use it. */
5925 cc_t
*sig_char
= NULL
;
5927 tcgetattr (XINT (p
->infd
), &t
);
5932 sig_char
= &t
.c_cc
[VINTR
];
5936 sig_char
= &t
.c_cc
[VQUIT
];
5940 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5941 sig_char
= &t
.c_cc
[VSWTCH
];
5943 sig_char
= &t
.c_cc
[VSUSP
];
5948 if (sig_char
&& *sig_char
!= CDISABLE
)
5950 send_process (proc
, sig_char
, 1, Qnil
);
5953 /* If we can't send the signal with a character,
5954 fall through and send it another way. */
5955 #else /* ! HAVE_TERMIOS */
5957 /* On Berkeley descendants, the following IOCTL's retrieve the
5958 current control characters. */
5959 #if defined (TIOCGLTC) && defined (TIOCGETC)
5967 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5968 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5971 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5972 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5976 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5977 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5979 #endif /* ! defined (SIGTSTP) */
5982 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5984 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5991 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5992 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5995 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5996 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
6000 ioctl (XINT (p
->infd
), TCGETA
, &t
);
6001 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
6003 #endif /* ! defined (SIGTSTP) */
6005 #else /* ! defined (TCGETA) */
6006 Your configuration files are messed up
.
6007 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
6008 you'd better be using one of the alternatives above! */
6009 #endif /* ! defined (TCGETA) */
6010 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6011 /* In this case, the code above should alway returns. */
6013 #endif /* ! defined HAVE_TERMIOS */
6015 /* The code above may fall through if it can't
6016 handle the signal. */
6017 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6020 /* Get the current pgrp using the tty itself, if we have that.
6021 Otherwise, use the pty to get the pgrp.
6022 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6023 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6024 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6025 His patch indicates that if TIOCGPGRP returns an error, then
6026 we should just assume that p->pid is also the process group id. */
6028 gid
= emacs_get_tty_pgrp (p
);
6031 /* If we can't get the information, assume
6032 the shell owns the tty. */
6035 /* It is not clear whether anything really can set GID to -1.
6036 Perhaps on some system one of those ioctls can or could do so.
6037 Or perhaps this is vestigial. */
6040 #else /* ! defined (TIOCGPGRP ) */
6041 /* Can't select pgrps on this system, so we know that
6042 the child itself heads the pgrp. */
6044 #endif /* ! defined (TIOCGPGRP ) */
6046 /* If current_group is lambda, and the shell owns the terminal,
6047 don't send any signal. */
6048 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6056 p
->raw_status_new
= 0;
6058 XSETINT (p
->tick
, ++process_tick
);
6060 status_notify (NULL
);
6062 #endif /* ! defined (SIGCONT) */
6065 send_process (proc
, "\003", 1, Qnil
); /* ^C */
6070 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
6075 sys$
forcex (&(p
->pid
), 0, 1);
6078 flush_pending_output (XINT (p
->infd
));
6082 /* If we don't have process groups, send the signal to the immediate
6083 subprocess. That isn't really right, but it's better than any
6084 obvious alternative. */
6087 kill (p
->pid
, signo
);
6091 /* gid may be a pid, or minus a pgrp's number */
6093 if (!NILP (current_group
))
6095 if (ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
) == -1)
6096 EMACS_KILLPG (gid
, signo
);
6103 #else /* ! defined (TIOCSIGSEND) */
6104 EMACS_KILLPG (gid
, signo
);
6105 #endif /* ! defined (TIOCSIGSEND) */
6108 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6109 doc
: /* Interrupt process PROCESS.
6110 PROCESS may be a process, a buffer, or the name of a process or buffer.
6111 No arg or nil means current buffer's process.
6112 Second arg CURRENT-GROUP non-nil means send signal to
6113 the current process-group of the process's controlling terminal
6114 rather than to the process's own process group.
6115 If the process is a shell, this means interrupt current subjob
6116 rather than the shell.
6118 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6119 don't send the signal. */)
6120 (process
, current_group
)
6121 Lisp_Object process
, current_group
;
6123 process_send_signal (process
, SIGINT
, current_group
, 0);
6127 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6128 doc
: /* Kill process PROCESS. May be process or name of one.
6129 See function `interrupt-process' for more details on usage. */)
6130 (process
, current_group
)
6131 Lisp_Object process
, current_group
;
6133 process_send_signal (process
, SIGKILL
, current_group
, 0);
6137 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6138 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6139 See function `interrupt-process' for more details on usage. */)
6140 (process
, current_group
)
6141 Lisp_Object process
, current_group
;
6143 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6147 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6148 doc
: /* Stop process PROCESS. May be process or name of one.
6149 See function `interrupt-process' for more details on usage.
6150 If PROCESS is a network process, inhibit handling of incoming traffic. */)
6151 (process
, current_group
)
6152 Lisp_Object process
, current_group
;
6155 if (PROCESSP (process
) && NETCONN_P (process
))
6157 struct Lisp_Process
*p
;
6159 p
= XPROCESS (process
);
6160 if (NILP (p
->command
)
6161 && XINT (p
->infd
) >= 0)
6163 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6164 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6171 error ("No SIGTSTP support");
6173 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6178 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6179 doc
: /* Continue process PROCESS. May be process or name of one.
6180 See function `interrupt-process' for more details on usage.
6181 If PROCESS is a network process, resume handling of incoming traffic. */)
6182 (process
, current_group
)
6183 Lisp_Object process
, current_group
;
6186 if (PROCESSP (process
) && NETCONN_P (process
))
6188 struct Lisp_Process
*p
;
6190 p
= XPROCESS (process
);
6191 if (EQ (p
->command
, Qt
)
6192 && XINT (p
->infd
) >= 0
6193 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6195 FD_SET (XINT (p
->infd
), &input_wait_mask
);
6196 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
6203 process_send_signal (process
, SIGCONT
, current_group
, 0);
6205 error ("No SIGCONT support");
6210 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6211 2, 2, "sProcess (name or number): \nnSignal code: ",
6212 doc
: /* Send PROCESS the signal with code SIGCODE.
6213 PROCESS may also be a number specifying the process id of the
6214 process to signal; in this case, the process need not be a child of
6216 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6218 Lisp_Object process
, sigcode
;
6222 if (INTEGERP (process
))
6224 pid
= XINT (process
);
6228 if (FLOATP (process
))
6230 pid
= (pid_t
) XFLOAT_DATA (process
);
6234 if (STRINGP (process
))
6237 if (tem
= Fget_process (process
), NILP (tem
))
6239 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6246 process
= get_process (process
);
6251 CHECK_PROCESS (process
);
6252 pid
= XPROCESS (process
)->pid
;
6254 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6258 #define parse_signal(NAME, VALUE) \
6259 else if (!xstricmp (name, NAME)) \
6260 XSETINT (sigcode, VALUE)
6262 if (INTEGERP (sigcode
))
6266 unsigned char *name
;
6268 CHECK_SYMBOL (sigcode
);
6269 name
= SDATA (SYMBOL_NAME (sigcode
));
6271 if (!strncmp(name
, "SIG", 3) || !strncmp(name
, "sig", 3))
6277 parse_signal ("usr1", SIGUSR1
);
6280 parse_signal ("usr2", SIGUSR2
);
6283 parse_signal ("term", SIGTERM
);
6286 parse_signal ("hup", SIGHUP
);
6289 parse_signal ("int", SIGINT
);
6292 parse_signal ("quit", SIGQUIT
);
6295 parse_signal ("ill", SIGILL
);
6298 parse_signal ("abrt", SIGABRT
);
6301 parse_signal ("emt", SIGEMT
);
6304 parse_signal ("kill", SIGKILL
);
6307 parse_signal ("fpe", SIGFPE
);
6310 parse_signal ("bus", SIGBUS
);
6313 parse_signal ("segv", SIGSEGV
);
6316 parse_signal ("sys", SIGSYS
);
6319 parse_signal ("pipe", SIGPIPE
);
6322 parse_signal ("alrm", SIGALRM
);
6325 parse_signal ("urg", SIGURG
);
6328 parse_signal ("stop", SIGSTOP
);
6331 parse_signal ("tstp", SIGTSTP
);
6334 parse_signal ("cont", SIGCONT
);
6337 parse_signal ("chld", SIGCHLD
);
6340 parse_signal ("ttin", SIGTTIN
);
6343 parse_signal ("ttou", SIGTTOU
);
6346 parse_signal ("io", SIGIO
);
6349 parse_signal ("xcpu", SIGXCPU
);
6352 parse_signal ("xfsz", SIGXFSZ
);
6355 parse_signal ("vtalrm", SIGVTALRM
);
6358 parse_signal ("prof", SIGPROF
);
6361 parse_signal ("winch", SIGWINCH
);
6364 parse_signal ("info", SIGINFO
);
6367 error ("Undefined signal name %s", name
);
6372 return make_number (kill (pid
, XINT (sigcode
)));
6375 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6376 doc
: /* Make PROCESS see end-of-file in its input.
6377 EOF comes after any text already sent to it.
6378 PROCESS may be a process, a buffer, the name of a process or buffer, or
6379 nil, indicating the current buffer's process.
6380 If PROCESS is a network connection, or is a process communicating
6381 through a pipe (as opposed to a pty), then you cannot send any more
6382 text to PROCESS after you call this function. */)
6384 Lisp_Object process
;
6387 struct coding_system
*coding
;
6389 if (DATAGRAM_CONN_P (process
))
6392 proc
= get_process (process
);
6393 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
6395 /* Make sure the process is really alive. */
6396 if (XPROCESS (proc
)->raw_status_new
)
6397 update_status (XPROCESS (proc
));
6398 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6399 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6401 if (CODING_REQUIRE_FLUSHING (coding
))
6403 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6404 send_process (proc
, "", 0, Qnil
);
6408 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6410 if (!NILP (XPROCESS (proc
)->pty_flag
))
6411 send_process (proc
, "\004", 1, Qnil
);
6414 int old_outfd
, new_outfd
;
6416 #ifdef HAVE_SHUTDOWN
6417 /* If this is a network connection, or socketpair is used
6418 for communication with the subprocess, call shutdown to cause EOF.
6419 (In some old system, shutdown to socketpair doesn't work.
6420 Then we just can't win.) */
6421 if (XPROCESS (proc
)->pid
== 0
6422 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
6423 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
6424 /* In case of socketpair, outfd == infd, so don't close it. */
6425 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
6426 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6427 #else /* not HAVE_SHUTDOWN */
6428 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6429 #endif /* not HAVE_SHUTDOWN */
6430 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6433 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
6435 if (!proc_encode_coding_system
[new_outfd
])
6436 proc_encode_coding_system
[new_outfd
]
6437 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6438 bcopy (proc_encode_coding_system
[old_outfd
],
6439 proc_encode_coding_system
[new_outfd
],
6440 sizeof (struct coding_system
));
6441 bzero (proc_encode_coding_system
[old_outfd
],
6442 sizeof (struct coding_system
));
6444 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
6450 /* Kill all processes associated with `buffer'.
6451 If `buffer' is nil, kill all processes */
6454 kill_buffer_processes (buffer
)
6457 Lisp_Object tail
, proc
;
6459 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6461 proc
= XCDR (XCAR (tail
));
6462 if (GC_PROCESSP (proc
)
6463 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6465 if (NETCONN_P (proc
))
6466 Fdelete_process (proc
);
6467 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
6468 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6473 /* On receipt of a signal that a child status has changed, loop asking
6474 about children with changed statuses until the system says there
6477 All we do is change the status; we do not run sentinels or print
6478 notifications. That is saved for the next time keyboard input is
6479 done, in order to avoid timing errors.
6481 ** WARNING: this can be called during garbage collection.
6482 Therefore, it must not be fooled by the presence of mark bits in
6485 ** USG WARNING: Although it is not obvious from the documentation
6486 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6487 signal() before executing at least one wait(), otherwise the
6488 handler will be called again, resulting in an infinite loop. The
6489 relevant portion of the documentation reads "SIGCLD signals will be
6490 queued and the signal-catching function will be continually
6491 reentered until the queue is empty". Invoking signal() causes the
6492 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6495 ** Malloc WARNING: This should never call malloc either directly or
6496 indirectly; if it does, that is a bug */
6500 sigchld_handler (signo
)
6503 int old_errno
= errno
;
6505 register struct Lisp_Process
*p
;
6506 extern EMACS_TIME
*input_available_clear_time
;
6508 SIGNAL_THREAD_CHECK (signo
);
6512 sigheld
|= sigbit (SIGCHLD
);
6524 #endif /* no WUNTRACED */
6525 /* Keep trying to get a status until we get a definitive result. */
6529 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6531 while (pid
< 0 && errno
== EINTR
);
6535 /* PID == 0 means no processes found, PID == -1 means a real
6536 failure. We have done all our job, so return. */
6538 /* USG systems forget handlers when they are used;
6539 must reestablish each time */
6540 #if defined (USG) && !defined (POSIX_SIGNALS)
6541 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6544 sigheld
&= ~sigbit (SIGCHLD
);
6552 #endif /* no WNOHANG */
6554 /* Find the process that signaled us, and record its status. */
6556 /* The process can have been deleted by Fdelete_process. */
6557 for (tail
= deleted_pid_list
; GC_CONSP (tail
); tail
= XCDR (tail
))
6559 Lisp_Object xpid
= XCAR (tail
);
6560 if ((GC_INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6561 || (GC_FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6563 XSETCAR (tail
, Qnil
);
6564 goto sigchld_end_of_loop
;
6568 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6570 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6572 proc
= XCDR (XCAR (tail
));
6573 p
= XPROCESS (proc
);
6574 if (GC_EQ (p
->childp
, Qt
) && p
->pid
== pid
)
6579 /* Look for an asynchronous process whose pid hasn't been filled
6582 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6584 proc
= XCDR (XCAR (tail
));
6585 p
= XPROCESS (proc
);
6591 /* Change the status of the process that was found. */
6594 union { int i
; WAITTYPE wt
; } u
;
6595 int clear_desc_flag
= 0;
6597 XSETINT (p
->tick
, ++process_tick
);
6599 p
->raw_status
= u
.i
;
6600 p
->raw_status_new
= 1;
6602 /* If process has terminated, stop waiting for its output. */
6603 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6604 && XINT (p
->infd
) >= 0)
6605 clear_desc_flag
= 1;
6607 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6608 if (clear_desc_flag
)
6610 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6611 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6614 /* Tell wait_reading_process_output that it needs to wake up and
6616 if (input_available_clear_time
)
6617 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6620 /* There was no asynchronous process found for that pid: we have
6621 a synchronous process. */
6624 synch_process_alive
= 0;
6626 /* Report the status of the synchronous process. */
6628 synch_process_retcode
= WRETCODE (w
);
6629 else if (WIFSIGNALED (w
))
6630 synch_process_termsig
= WTERMSIG (w
);
6632 /* Tell wait_reading_process_output that it needs to wake up and
6634 if (input_available_clear_time
)
6635 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6638 sigchld_end_of_loop
:
6641 /* On some systems, we must return right away.
6642 If any more processes want to signal us, we will
6644 Otherwise (on systems that have WNOHANG), loop around
6645 to use up all the processes that have something to tell us. */
6646 #if (defined WINDOWSNT \
6647 || (defined USG && !defined GNU_LINUX \
6648 && !(defined HPUX && defined WNOHANG)))
6649 #if defined (USG) && ! defined (POSIX_SIGNALS)
6650 signal (signo
, sigchld_handler
);
6654 #endif /* USG, but not HPUX with WNOHANG */
6657 #endif /* SIGCHLD */
6661 exec_sentinel_unwind (data
)
6664 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6669 exec_sentinel_error_handler (error
)
6672 cmd_error_internal (error
, "error in process sentinel: ");
6674 update_echo_area ();
6675 Fsleep_for (make_number (2), Qnil
);
6680 exec_sentinel (proc
, reason
)
6681 Lisp_Object proc
, reason
;
6683 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6684 register struct Lisp_Process
*p
= XPROCESS (proc
);
6685 int count
= SPECPDL_INDEX ();
6686 int outer_running_asynch_code
= running_asynch_code
;
6687 int waiting
= waiting_for_user_input_p
;
6689 if (inhibit_sentinels
)
6692 /* No need to gcpro these, because all we do with them later
6693 is test them for EQness, and none of them should be a string. */
6694 odeactivate
= Vdeactivate_mark
;
6695 XSETBUFFER (obuffer
, current_buffer
);
6696 okeymap
= current_buffer
->keymap
;
6698 sentinel
= p
->sentinel
;
6699 if (NILP (sentinel
))
6702 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6703 assure that it gets restored no matter how the sentinel exits. */
6705 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6706 /* Inhibit quit so that random quits don't screw up a running filter. */
6707 specbind (Qinhibit_quit
, Qt
);
6708 specbind (Qlast_nonmenu_event
, Qt
);
6710 /* In case we get recursively called,
6711 and we already saved the match data nonrecursively,
6712 save the same match data in safely recursive fashion. */
6713 if (outer_running_asynch_code
)
6716 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6717 restore_search_regs ();
6718 record_unwind_save_match_data ();
6719 Fset_match_data (tem
, Qt
);
6722 /* For speed, if a search happens within this code,
6723 save the match data in a special nonrecursive fashion. */
6724 running_asynch_code
= 1;
6726 internal_condition_case_1 (read_process_output_call
,
6728 Fcons (proc
, Fcons (reason
, Qnil
))),
6729 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6730 exec_sentinel_error_handler
);
6732 /* If we saved the match data nonrecursively, restore it now. */
6733 restore_search_regs ();
6734 running_asynch_code
= outer_running_asynch_code
;
6736 Vdeactivate_mark
= odeactivate
;
6738 /* Restore waiting_for_user_input_p as it was
6739 when we were called, in case the filter clobbered it. */
6740 waiting_for_user_input_p
= waiting
;
6743 if (! EQ (Fcurrent_buffer (), obuffer
)
6744 || ! EQ (current_buffer
->keymap
, okeymap
))
6746 /* But do it only if the caller is actually going to read events.
6747 Otherwise there's no need to make him wake up, and it could
6748 cause trouble (for example it would make sit_for return). */
6749 if (waiting_for_user_input_p
== -1)
6750 record_asynch_buffer_change ();
6752 unbind_to (count
, Qnil
);
6755 /* Report all recent events of a change in process status
6756 (either run the sentinel or output a message).
6757 This is usually done while Emacs is waiting for keyboard input
6758 but can be done at other times. */
6761 status_notify (deleting_process
)
6762 struct Lisp_Process
*deleting_process
;
6764 register Lisp_Object proc
, buffer
;
6765 Lisp_Object tail
, msg
;
6766 struct gcpro gcpro1
, gcpro2
;
6770 /* We need to gcpro tail; if read_process_output calls a filter
6771 which deletes a process and removes the cons to which tail points
6772 from Vprocess_alist, and then causes a GC, tail is an unprotected
6776 /* Set this now, so that if new processes are created by sentinels
6777 that we run, we get called again to handle their status changes. */
6778 update_tick
= process_tick
;
6780 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6783 register struct Lisp_Process
*p
;
6785 proc
= Fcdr (Fcar (tail
));
6786 p
= XPROCESS (proc
);
6788 if (XINT (p
->tick
) != XINT (p
->update_tick
))
6790 XSETINT (p
->update_tick
, XINT (p
->tick
));
6792 /* If process is still active, read any output that remains. */
6793 while (! EQ (p
->filter
, Qt
)
6794 && ! EQ (p
->status
, Qconnect
)
6795 && ! EQ (p
->status
, Qlisten
)
6796 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6797 && XINT (p
->infd
) >= 0
6798 && p
!= deleting_process
6799 && read_process_output (proc
, XINT (p
->infd
)) > 0);
6803 /* Get the text to use for the message. */
6804 if (p
->raw_status_new
)
6806 msg
= status_message (p
);
6808 /* If process is terminated, deactivate it or delete it. */
6810 if (CONSP (p
->status
))
6811 symbol
= XCAR (p
->status
);
6813 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6814 || EQ (symbol
, Qclosed
))
6816 if (delete_exited_processes
)
6817 remove_process (proc
);
6819 deactivate_process (proc
);
6822 /* The actions above may have further incremented p->tick.
6823 So set p->update_tick again
6824 so that an error in the sentinel will not cause
6825 this code to be run again. */
6826 XSETINT (p
->update_tick
, XINT (p
->tick
));
6827 /* Now output the message suitably. */
6828 if (!NILP (p
->sentinel
))
6829 exec_sentinel (proc
, msg
);
6830 /* Don't bother with a message in the buffer
6831 when a process becomes runnable. */
6832 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6834 Lisp_Object ro
, tem
;
6835 struct buffer
*old
= current_buffer
;
6836 int opoint
, opoint_byte
;
6837 int before
, before_byte
;
6839 ro
= XBUFFER (buffer
)->read_only
;
6841 /* Avoid error if buffer is deleted
6842 (probably that's why the process is dead, too) */
6843 if (NILP (XBUFFER (buffer
)->name
))
6845 Fset_buffer (buffer
);
6848 opoint_byte
= PT_BYTE
;
6849 /* Insert new output into buffer
6850 at the current end-of-output marker,
6851 thus preserving logical ordering of input and output. */
6852 if (XMARKER (p
->mark
)->buffer
)
6853 Fgoto_char (p
->mark
);
6855 SET_PT_BOTH (ZV
, ZV_BYTE
);
6858 before_byte
= PT_BYTE
;
6860 tem
= current_buffer
->read_only
;
6861 current_buffer
->read_only
= Qnil
;
6862 insert_string ("\nProcess ");
6863 Finsert (1, &p
->name
);
6864 insert_string (" ");
6866 current_buffer
->read_only
= tem
;
6867 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6869 if (opoint
>= before
)
6870 SET_PT_BOTH (opoint
+ (PT
- before
),
6871 opoint_byte
+ (PT_BYTE
- before_byte
));
6873 SET_PT_BOTH (opoint
, opoint_byte
);
6875 set_buffer_internal (old
);
6880 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6881 redisplay_preserve_echo_area (13);
6887 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6888 Sset_process_coding_system
, 1, 3, 0,
6889 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6890 DECODING will be used to decode subprocess output and ENCODING to
6891 encode subprocess input. */)
6892 (process
, decoding
, encoding
)
6893 register Lisp_Object process
, decoding
, encoding
;
6895 register struct Lisp_Process
*p
;
6897 CHECK_PROCESS (process
);
6898 p
= XPROCESS (process
);
6899 if (XINT (p
->infd
) < 0)
6900 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6901 if (XINT (p
->outfd
) < 0)
6902 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6903 Fcheck_coding_system (decoding
);
6904 Fcheck_coding_system (encoding
);
6906 p
->decode_coding_system
= decoding
;
6907 p
->encode_coding_system
= encoding
;
6908 setup_process_coding_systems (process
);
6913 DEFUN ("process-coding-system",
6914 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6915 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6917 register Lisp_Object process
;
6919 CHECK_PROCESS (process
);
6920 return Fcons (XPROCESS (process
)->decode_coding_system
,
6921 XPROCESS (process
)->encode_coding_system
);
6924 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6925 Sset_process_filter_multibyte
, 2, 2, 0,
6926 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6927 If FLAG is non-nil, the filter is given multibyte strings.
6928 If FLAG is nil, the filter is given unibyte strings. In this case,
6929 all character code conversion except for end-of-line conversion is
6932 Lisp_Object process
, flag
;
6934 register struct Lisp_Process
*p
;
6936 CHECK_PROCESS (process
);
6937 p
= XPROCESS (process
);
6938 p
->filter_multibyte
= flag
;
6939 setup_process_coding_systems (process
);
6944 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6945 Sprocess_filter_multibyte_p
, 1, 1, 0,
6946 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6948 Lisp_Object process
;
6950 register struct Lisp_Process
*p
;
6952 CHECK_PROCESS (process
);
6953 p
= XPROCESS (process
);
6955 return (NILP (p
->filter_multibyte
) ? Qnil
: Qt
);
6960 /* The first time this is called, assume keyboard input comes from DESC
6961 instead of from where we used to expect it.
6962 Subsequent calls mean assume input keyboard can come from DESC
6963 in addition to other places. */
6965 static int add_keyboard_wait_descriptor_called_flag
;
6968 add_keyboard_wait_descriptor (desc
)
6971 if (! add_keyboard_wait_descriptor_called_flag
)
6972 FD_CLR (0, &input_wait_mask
);
6973 add_keyboard_wait_descriptor_called_flag
= 1;
6974 FD_SET (desc
, &input_wait_mask
);
6975 FD_SET (desc
, &non_process_wait_mask
);
6976 if (desc
> max_keyboard_desc
)
6977 max_keyboard_desc
= desc
;
6980 /* From now on, do not expect DESC to give keyboard input. */
6983 delete_keyboard_wait_descriptor (desc
)
6987 int lim
= max_keyboard_desc
;
6989 FD_CLR (desc
, &input_wait_mask
);
6990 FD_CLR (desc
, &non_process_wait_mask
);
6992 if (desc
== max_keyboard_desc
)
6993 for (fd
= 0; fd
< lim
; fd
++)
6994 if (FD_ISSET (fd
, &input_wait_mask
)
6995 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6996 max_keyboard_desc
= fd
;
6999 /* Return nonzero if *MASK has a bit set
7000 that corresponds to one of the keyboard input descriptors. */
7003 keyboard_bit_set (mask
)
7008 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
7009 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7010 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7021 inhibit_sentinels
= 0;
7025 if (! noninteractive
|| initialized
)
7027 signal (SIGCHLD
, sigchld_handler
);
7030 FD_ZERO (&input_wait_mask
);
7031 FD_ZERO (&non_keyboard_wait_mask
);
7032 FD_ZERO (&non_process_wait_mask
);
7033 max_process_desc
= 0;
7035 #ifdef NON_BLOCKING_CONNECT
7036 FD_ZERO (&connect_wait_mask
);
7037 num_pending_connects
= 0;
7040 #ifdef ADAPTIVE_READ_BUFFERING
7041 process_output_delay_count
= 0;
7042 process_output_skip
= 0;
7045 FD_SET (0, &input_wait_mask
);
7047 Vprocess_alist
= Qnil
;
7049 deleted_pid_list
= Qnil
;
7051 for (i
= 0; i
< MAXDESC
; i
++)
7053 chan_process
[i
] = Qnil
;
7054 proc_buffered_char
[i
] = -1;
7056 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
7057 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
7058 #ifdef DATAGRAM_SOCKETS
7059 bzero (datagram_address
, sizeof datagram_address
);
7064 Lisp_Object subfeatures
= Qnil
;
7065 struct socket_options
*sopt
;
7067 #define ADD_SUBFEATURE(key, val) \
7068 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
7070 #ifdef NON_BLOCKING_CONNECT
7071 ADD_SUBFEATURE (QCnowait
, Qt
);
7073 #ifdef DATAGRAM_SOCKETS
7074 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7076 #ifdef HAVE_LOCAL_SOCKETS
7077 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7079 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7081 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7083 #ifdef HAVE_GETSOCKNAME
7084 ADD_SUBFEATURE (QCservice
, Qt
);
7086 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
7087 ADD_SUBFEATURE (QCserver
, Qt
);
7090 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7091 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
7093 Fprovide (intern ("make-network-process"), subfeatures
);
7095 #endif /* HAVE_SOCKETS */
7097 #if defined (DARWIN) || defined (MAC_OSX)
7098 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7099 processes. As such, we only change the default value. */
7102 char *release
= get_operating_system_release();
7103 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7104 && release
[1] == '.')) {
7105 Vprocess_connection_type
= Qnil
;
7114 Qprocessp
= intern ("processp");
7115 staticpro (&Qprocessp
);
7116 Qrun
= intern ("run");
7118 Qstop
= intern ("stop");
7120 Qsignal
= intern ("signal");
7121 staticpro (&Qsignal
);
7123 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7126 Qexit = intern ("exit");
7127 staticpro (&Qexit); */
7129 Qopen
= intern ("open");
7131 Qclosed
= intern ("closed");
7132 staticpro (&Qclosed
);
7133 Qconnect
= intern ("connect");
7134 staticpro (&Qconnect
);
7135 Qfailed
= intern ("failed");
7136 staticpro (&Qfailed
);
7137 Qlisten
= intern ("listen");
7138 staticpro (&Qlisten
);
7139 Qlocal
= intern ("local");
7140 staticpro (&Qlocal
);
7141 Qipv4
= intern ("ipv4");
7144 Qipv6
= intern ("ipv6");
7147 Qdatagram
= intern ("datagram");
7148 staticpro (&Qdatagram
);
7150 QCname
= intern (":name");
7151 staticpro (&QCname
);
7152 QCbuffer
= intern (":buffer");
7153 staticpro (&QCbuffer
);
7154 QChost
= intern (":host");
7155 staticpro (&QChost
);
7156 QCservice
= intern (":service");
7157 staticpro (&QCservice
);
7158 QCtype
= intern (":type");
7159 staticpro (&QCtype
);
7160 QClocal
= intern (":local");
7161 staticpro (&QClocal
);
7162 QCremote
= intern (":remote");
7163 staticpro (&QCremote
);
7164 QCcoding
= intern (":coding");
7165 staticpro (&QCcoding
);
7166 QCserver
= intern (":server");
7167 staticpro (&QCserver
);
7168 QCnowait
= intern (":nowait");
7169 staticpro (&QCnowait
);
7170 QCsentinel
= intern (":sentinel");
7171 staticpro (&QCsentinel
);
7172 QClog
= intern (":log");
7174 QCnoquery
= intern (":noquery");
7175 staticpro (&QCnoquery
);
7176 QCstop
= intern (":stop");
7177 staticpro (&QCstop
);
7178 QCoptions
= intern (":options");
7179 staticpro (&QCoptions
);
7180 QCplist
= intern (":plist");
7181 staticpro (&QCplist
);
7182 QCfilter_multibyte
= intern (":filter-multibyte");
7183 staticpro (&QCfilter_multibyte
);
7185 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
7186 staticpro (&Qlast_nonmenu_event
);
7188 staticpro (&Vprocess_alist
);
7190 staticpro (&deleted_pid_list
);
7193 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
7194 doc
: /* *Non-nil means delete processes immediately when they exit.
7195 A value of nil means don't delete them until `list-processes' is run. */);
7197 delete_exited_processes
= 1;
7199 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
7200 doc
: /* Control type of device used to communicate with subprocesses.
7201 Values are nil to use a pipe, or t or `pty' to use a pty.
7202 The value has no effect if the system has no ptys or if all ptys are busy:
7203 then a pipe is used in any case.
7204 The value takes effect when `start-process' is called. */);
7205 Vprocess_connection_type
= Qt
;
7207 #ifdef ADAPTIVE_READ_BUFFERING
7208 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
7209 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7210 On some systems, when Emacs reads the output from a subprocess, the output data
7211 is read in very small blocks, potentially resulting in very poor performance.
7212 This behavior can be remedied to some extent by setting this variable to a
7213 non-nil value, as it will automatically delay reading from such processes, to
7214 allow them to produce more output before Emacs tries to read it.
7215 If the value is t, the delay is reset after each write to the process; any other
7216 non-nil value means that the delay is not reset on write.
7217 The variable takes effect when `start-process' is called. */);
7218 Vprocess_adaptive_read_buffering
= Qt
;
7221 defsubr (&Sprocessp
);
7222 defsubr (&Sget_process
);
7223 defsubr (&Sget_buffer_process
);
7224 defsubr (&Sdelete_process
);
7225 defsubr (&Sprocess_status
);
7226 defsubr (&Sprocess_exit_status
);
7227 defsubr (&Sprocess_id
);
7228 defsubr (&Sprocess_name
);
7229 defsubr (&Sprocess_tty_name
);
7230 defsubr (&Sprocess_command
);
7231 defsubr (&Sset_process_buffer
);
7232 defsubr (&Sprocess_buffer
);
7233 defsubr (&Sprocess_mark
);
7234 defsubr (&Sset_process_filter
);
7235 defsubr (&Sprocess_filter
);
7236 defsubr (&Sset_process_sentinel
);
7237 defsubr (&Sprocess_sentinel
);
7238 defsubr (&Sset_process_window_size
);
7239 defsubr (&Sset_process_inherit_coding_system_flag
);
7240 defsubr (&Sprocess_inherit_coding_system_flag
);
7241 defsubr (&Sset_process_query_on_exit_flag
);
7242 defsubr (&Sprocess_query_on_exit_flag
);
7243 defsubr (&Sprocess_contact
);
7244 defsubr (&Sprocess_plist
);
7245 defsubr (&Sset_process_plist
);
7246 defsubr (&Slist_processes
);
7247 defsubr (&Sprocess_list
);
7248 defsubr (&Sstart_process
);
7250 defsubr (&Sset_network_process_option
);
7251 defsubr (&Smake_network_process
);
7252 defsubr (&Sformat_network_address
);
7253 #endif /* HAVE_SOCKETS */
7254 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
7256 defsubr (&Snetwork_interface_list
);
7258 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7259 defsubr (&Snetwork_interface_info
);
7261 #endif /* HAVE_SOCKETS ... */
7262 #ifdef DATAGRAM_SOCKETS
7263 defsubr (&Sprocess_datagram_address
);
7264 defsubr (&Sset_process_datagram_address
);
7266 defsubr (&Saccept_process_output
);
7267 defsubr (&Sprocess_send_region
);
7268 defsubr (&Sprocess_send_string
);
7269 defsubr (&Sinterrupt_process
);
7270 defsubr (&Skill_process
);
7271 defsubr (&Squit_process
);
7272 defsubr (&Sstop_process
);
7273 defsubr (&Scontinue_process
);
7274 defsubr (&Sprocess_running_child_p
);
7275 defsubr (&Sprocess_send_eof
);
7276 defsubr (&Ssignal_process
);
7277 defsubr (&Swaiting_for_user_input_p
);
7278 /* defsubr (&Sprocess_connection); */
7279 defsubr (&Sset_process_coding_system
);
7280 defsubr (&Sprocess_coding_system
);
7281 defsubr (&Sset_process_filter_multibyte
);
7282 defsubr (&Sprocess_filter_multibyte_p
);
7286 #else /* not subprocesses */
7288 #include <sys/types.h>
7292 #include "systime.h"
7293 #include "charset.h"
7295 #include "termopts.h"
7296 #include "sysselect.h"
7298 extern int frame_garbaged
;
7300 extern EMACS_TIME
timer_check ();
7301 extern int timers_run
;
7305 /* As described above, except assuming that there are no subprocesses:
7307 Wait for timeout to elapse and/or keyboard input to be available.
7310 timeout in seconds, or
7311 zero for no limit, or
7312 -1 means gobble data immediately available but don't wait for any.
7314 read_kbd is a Lisp_Object:
7315 0 to ignore keyboard input, or
7316 1 to return when input is available, or
7317 -1 means caller will actually read the input, so don't throw to
7320 see full version for other parameters. We know that wait_proc will
7321 always be NULL, since `subprocesses' isn't defined.
7323 do_display != 0 means redisplay should be done to show subprocess
7324 output that arrives.
7326 Return true iff we received input from any process. */
7329 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
7330 wait_for_cell
, wait_proc
, just_wait_proc
)
7331 int time_limit
, microsecs
, read_kbd
, do_display
;
7332 Lisp_Object wait_for_cell
;
7333 struct Lisp_Process
*wait_proc
;
7337 EMACS_TIME end_time
, timeout
;
7338 SELECT_TYPE waitchannels
;
7341 /* What does time_limit really mean? */
7342 if (time_limit
|| microsecs
)
7344 EMACS_GET_TIME (end_time
);
7345 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
7346 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
7349 /* Turn off periodic alarms (in case they are in use)
7350 and then turn off any other atimers,
7351 because the select emulator uses alarms. */
7353 turn_on_atimers (0);
7357 int timeout_reduced_for_timers
= 0;
7359 /* If calling from keyboard input, do not quit
7360 since we want to return C-g as an input character.
7361 Otherwise, do pending quit if requested. */
7365 /* Exit now if the cell we're waiting for became non-nil. */
7366 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7369 /* Compute time from now till when time limit is up */
7370 /* Exit if already run out */
7371 if (time_limit
== -1)
7373 /* -1 specified for timeout means
7374 gobble output available now
7375 but don't wait at all. */
7377 EMACS_SET_SECS_USECS (timeout
, 0, 0);
7379 else if (time_limit
|| microsecs
)
7381 EMACS_GET_TIME (timeout
);
7382 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
7383 if (EMACS_TIME_NEG_P (timeout
))
7388 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7391 /* If our caller will not immediately handle keyboard events,
7392 run timer events directly.
7393 (Callers that will immediately read keyboard events
7394 call timer_delay on their own.) */
7395 if (NILP (wait_for_cell
))
7397 EMACS_TIME timer_delay
;
7401 int old_timers_run
= timers_run
;
7402 timer_delay
= timer_check (1);
7403 if (timers_run
!= old_timers_run
&& do_display
)
7404 /* We must retry, since a timer may have requeued itself
7405 and that could alter the time delay. */
7406 redisplay_preserve_echo_area (14);
7410 while (!detect_input_pending ());
7412 /* If there is unread keyboard input, also return. */
7414 && requeued_events_pending_p ())
7417 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7419 EMACS_TIME difference
;
7420 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7421 if (EMACS_TIME_NEG_P (difference
))
7423 timeout
= timer_delay
;
7424 timeout_reduced_for_timers
= 1;
7429 /* Cause C-g and alarm signals to take immediate action,
7430 and cause input available signals to zero out timeout. */
7432 set_waiting_for_input (&timeout
);
7434 /* Wait till there is something to do. */
7436 if (! read_kbd
&& NILP (wait_for_cell
))
7437 FD_ZERO (&waitchannels
);
7439 FD_SET (0, &waitchannels
);
7441 /* If a frame has been newly mapped and needs updating,
7442 reprocess its display stuff. */
7443 if (frame_garbaged
&& do_display
)
7445 clear_waiting_for_input ();
7446 redisplay_preserve_echo_area (15);
7448 set_waiting_for_input (&timeout
);
7451 if (read_kbd
&& detect_input_pending ())
7454 FD_ZERO (&waitchannels
);
7457 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7462 /* Make C-g and alarm signals set flags again */
7463 clear_waiting_for_input ();
7465 /* If we woke up due to SIGWINCH, actually change size now. */
7466 do_pending_window_change (0);
7468 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7469 /* We waited the full specified time, so return now. */
7474 /* If the system call was interrupted, then go around the
7476 if (xerrno
== EINTR
)
7477 FD_ZERO (&waitchannels
);
7479 error ("select error: %s", emacs_strerror (xerrno
));
7482 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7483 /* System sometimes fails to deliver SIGIO. */
7484 kill (getpid (), SIGIO
);
7487 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7488 kill (getpid (), SIGIO
);
7491 /* Check for keyboard input */
7494 && detect_input_pending_run_timers (do_display
))
7496 swallow_events (do_display
);
7497 if (detect_input_pending_run_timers (do_display
))
7501 /* If there is unread keyboard input, also return. */
7503 && requeued_events_pending_p ())
7506 /* If wait_for_cell. check for keyboard input
7507 but don't run any timers.
7508 ??? (It seems wrong to me to check for keyboard
7509 input at all when wait_for_cell, but the code
7510 has been this way since July 1994.
7511 Try changing this after version 19.31.) */
7512 if (! NILP (wait_for_cell
)
7513 && detect_input_pending ())
7515 swallow_events (do_display
);
7516 if (detect_input_pending ())
7520 /* Exit now if the cell we're waiting for became non-nil. */
7521 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7531 /* Don't confuse make-docfile by having two doc strings for this function.
7532 make-docfile does not pay attention to #if, for good reason! */
7533 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7536 register Lisp_Object name
;
7541 /* Don't confuse make-docfile by having two doc strings for this function.
7542 make-docfile does not pay attention to #if, for good reason! */
7543 DEFUN ("process-inherit-coding-system-flag",
7544 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7548 register Lisp_Object process
;
7550 /* Ignore the argument and return the value of
7551 inherit-process-coding-system. */
7552 return inherit_process_coding_system
? Qt
: Qnil
;
7555 /* Kill all processes associated with `buffer'.
7556 If `buffer' is nil, kill all processes.
7557 Since we have no subprocesses, this does nothing. */
7560 kill_buffer_processes (buffer
)
7573 QCtype
= intern (":type");
7574 staticpro (&QCtype
);
7576 defsubr (&Sget_buffer_process
);
7577 defsubr (&Sprocess_inherit_coding_system_flag
);
7581 #endif /* not subprocesses */
7583 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7584 (do not change this comment) */