1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1996, 1998, 1999, 2001, 2002, 2003, 2004,
4 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
43 #ifdef HAVE_INTTYPES_H
50 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
53 #endif /* not WINDOWSNT */
55 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
56 #include <sys/socket.h>
58 #include <netinet/in.h>
59 #include <arpa/inet.h>
60 #ifdef NEED_NET_ERRNO_H
61 #include <net/errno.h>
62 #endif /* NEED_NET_ERRNO_H */
64 /* Are local (unix) sockets supported? */
65 #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
66 #if !defined (AF_LOCAL) && defined (AF_UNIX)
67 #define AF_LOCAL AF_UNIX
70 #define HAVE_LOCAL_SOCKETS
74 #endif /* HAVE_SOCKETS */
76 /* TERM is a poor-man's SLIP, used on GNU/Linux. */
81 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
82 #ifdef HAVE_BROKEN_INET_ADDR
83 #define IN_ADDR struct in_addr
84 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
86 #define IN_ADDR unsigned long
87 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
90 #if defined(BSD_SYSTEM) || defined(STRIDE)
91 #include <sys/ioctl.h>
92 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
94 #endif /* HAVE_PTYS and no O_NDELAY */
95 #endif /* BSD_SYSTEM || STRIDE */
97 #ifdef BROKEN_O_NONBLOCK
99 #endif /* BROKEN_O_NONBLOCK */
105 /* Can we use SIOCGIFCONF and/or SIOCGIFADDR */
107 #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H)
108 /* sys/ioctl.h may have been included already */
110 #include <sys/ioctl.h>
117 #include <sys/sysmacros.h> /* for "minor" */
118 #endif /* not IRIS */
121 #include <sys/wait.h>
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);
630 p
->raw_status_new
= 0;
632 p
->mark
= Fmake_marker ();
634 #ifdef ADAPTIVE_READ_BUFFERING
635 p
->adaptive_read_buffering
= Qnil
;
636 XSETFASTINT (p
->read_output_delay
, 0);
637 p
->read_output_skip
= Qnil
;
640 /* If name is already in use, modify it until it is unused. */
645 tem
= Fget_process (name1
);
646 if (NILP (tem
)) break;
647 sprintf (suffix
, "<%d>", i
);
648 name1
= concat2 (name
, build_string (suffix
));
652 XSETPROCESS (val
, p
);
653 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
658 remove_process (proc
)
659 register Lisp_Object proc
;
661 register Lisp_Object pair
;
663 pair
= Frassq (proc
, Vprocess_alist
);
664 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
666 deactivate_process (proc
);
669 /* Setup coding systems of PROCESS. */
672 setup_process_coding_systems (process
)
675 struct Lisp_Process
*p
= XPROCESS (process
);
676 int inch
= XINT (p
->infd
);
677 int outch
= XINT (p
->outfd
);
679 if (inch
< 0 || outch
< 0)
682 if (!proc_decode_coding_system
[inch
])
683 proc_decode_coding_system
[inch
]
684 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
685 setup_coding_system (p
->decode_coding_system
,
686 proc_decode_coding_system
[inch
]);
687 if (! NILP (p
->filter
))
689 if (NILP (p
->filter_multibyte
))
690 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
692 else if (BUFFERP (p
->buffer
))
694 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
695 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
698 if (!proc_encode_coding_system
[outch
])
699 proc_encode_coding_system
[outch
]
700 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
701 setup_coding_system (p
->encode_coding_system
,
702 proc_encode_coding_system
[outch
]);
703 if (proc_encode_coding_system
[outch
]->eol_type
== CODING_EOL_UNDECIDED
)
704 proc_encode_coding_system
[outch
]->eol_type
= system_eol_type
;
707 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
708 doc
: /* Return t if OBJECT is a process. */)
712 return PROCESSP (object
) ? Qt
: Qnil
;
715 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
716 doc
: /* Return the process named NAME, or nil if there is none. */)
718 register Lisp_Object name
;
723 return Fcdr (Fassoc (name
, Vprocess_alist
));
726 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
727 doc
: /* Return the (or a) process associated with BUFFER.
728 BUFFER may be a buffer or the name of one. */)
730 register Lisp_Object buffer
;
732 register Lisp_Object buf
, tail
, proc
;
734 if (NILP (buffer
)) return Qnil
;
735 buf
= Fget_buffer (buffer
);
736 if (NILP (buf
)) return Qnil
;
738 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
740 proc
= Fcdr (Fcar (tail
));
741 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
747 /* This is how commands for the user decode process arguments. It
748 accepts a process, a process name, a buffer, a buffer name, or nil.
749 Buffers denote the first process in the buffer, and nil denotes the
754 register Lisp_Object name
;
756 register Lisp_Object proc
, obj
;
759 obj
= Fget_process (name
);
761 obj
= Fget_buffer (name
);
763 error ("Process %s does not exist", SDATA (name
));
765 else if (NILP (name
))
766 obj
= Fcurrent_buffer ();
770 /* Now obj should be either a buffer object or a process object.
774 proc
= Fget_buffer_process (obj
);
776 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
788 /* Fdelete_process promises to immediately forget about the process, but in
789 reality, Emacs needs to remember those processes until they have been
790 treated by sigchld_handler; otherwise this handler would consider the
791 process as being synchronous and say that the synchronous process is
793 static Lisp_Object deleted_pid_list
;
796 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
797 doc
: /* Delete PROCESS: kill it and forget about it immediately.
798 PROCESS may be a process, a buffer, the name of a process or buffer, or
799 nil, indicating the current buffer's process. */)
801 register Lisp_Object process
;
803 register struct Lisp_Process
*p
;
805 process
= get_process (process
);
806 p
= XPROCESS (process
);
808 p
->raw_status_new
= 0;
811 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
812 XSETINT (p
->tick
, ++process_tick
);
815 else if (XINT (p
->infd
) >= 0)
819 /* Assignment to EMACS_INT stops GCC whining about limited range
821 EMACS_INT pid
= p
->pid
;
823 /* No problem storing the pid here, as it is still in Vprocess_alist. */
824 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
825 /* GC treated elements set to nil. */
826 Fdelq (Qnil
, deleted_pid_list
));
827 /* If the process has already signaled, remove it from the list. */
828 if (p
->raw_status_new
)
831 if (CONSP (p
->status
))
832 symbol
= XCAR (p
->status
);
833 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
835 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
839 Fkill_process (process
, Qnil
);
840 /* Do this now, since remove_process will make sigchld_handler do nothing. */
842 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
843 XSETINT (p
->tick
, ++process_tick
);
847 remove_process (process
);
851 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
852 doc
: /* Return the status of PROCESS.
853 The returned value is one of the following symbols:
854 run -- for a process that is running.
855 stop -- for a process stopped but continuable.
856 exit -- for a process that has exited.
857 signal -- for a process that has got a fatal signal.
858 open -- for a network stream connection that is open.
859 listen -- for a network stream server that is listening.
860 closed -- for a network stream connection that is closed.
861 connect -- when waiting for a non-blocking connection to complete.
862 failed -- when a non-blocking connection has failed.
863 nil -- if arg is a process name and no such process exists.
864 PROCESS may be a process, a buffer, the name of a process, or
865 nil, indicating the current buffer's process. */)
867 register Lisp_Object process
;
869 register struct Lisp_Process
*p
;
870 register Lisp_Object status
;
872 if (STRINGP (process
))
873 process
= Fget_process (process
);
875 process
= get_process (process
);
880 p
= XPROCESS (process
);
881 if (p
->raw_status_new
)
885 status
= XCAR (status
);
888 if (EQ (status
, Qexit
))
890 else if (EQ (p
->command
, Qt
))
892 else if (EQ (status
, Qrun
))
898 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
900 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
901 If PROCESS has not yet exited or died, return 0. */)
903 register Lisp_Object process
;
905 CHECK_PROCESS (process
);
906 if (XPROCESS (process
)->raw_status_new
)
907 update_status (XPROCESS (process
));
908 if (CONSP (XPROCESS (process
)->status
))
909 return XCAR (XCDR (XPROCESS (process
)->status
));
910 return make_number (0);
913 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
914 doc
: /* Return the process id of PROCESS.
915 This is the pid of the external process which PROCESS uses or talks to.
916 For a network connection, this value is nil. */)
918 register Lisp_Object process
;
920 /* Assignment to EMACS_INT stops GCC whining about limited range of
924 CHECK_PROCESS (process
);
925 pid
= XPROCESS (process
)->pid
;
926 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
929 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
930 doc
: /* Return the name of PROCESS, as a string.
931 This is the name of the program invoked in PROCESS,
932 possibly modified to make it unique among process names. */)
934 register Lisp_Object process
;
936 CHECK_PROCESS (process
);
937 return XPROCESS (process
)->name
;
940 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
941 doc
: /* Return the command that was executed to start PROCESS.
942 This is a list of strings, the first string being the program executed
943 and the rest of the strings being the arguments given to it.
944 For a non-child channel, this is nil. */)
946 register Lisp_Object process
;
948 CHECK_PROCESS (process
);
949 return XPROCESS (process
)->command
;
952 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
953 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
954 This is the terminal that the process itself reads and writes on,
955 not the name of the pty that Emacs uses to talk with that terminal. */)
957 register Lisp_Object process
;
959 CHECK_PROCESS (process
);
960 return XPROCESS (process
)->tty_name
;
963 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
965 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
967 register Lisp_Object process
, buffer
;
969 struct Lisp_Process
*p
;
971 CHECK_PROCESS (process
);
973 CHECK_BUFFER (buffer
);
974 p
= XPROCESS (process
);
977 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
978 setup_process_coding_systems (process
);
982 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
984 doc
: /* Return the buffer PROCESS is associated with.
985 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
987 register Lisp_Object process
;
989 CHECK_PROCESS (process
);
990 return XPROCESS (process
)->buffer
;
993 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
995 doc
: /* Return the marker for the end of the last output from PROCESS. */)
997 register Lisp_Object process
;
999 CHECK_PROCESS (process
);
1000 return XPROCESS (process
)->mark
;
1003 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1005 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1006 A value of t means stop accepting output from the process.
1008 When a process has a filter, its buffer is not used for output.
1009 Instead, each time it does output, the entire string of output is
1010 passed to the filter.
1012 The filter gets two arguments: the process and the string of output.
1013 The string argument is normally a multibyte string, except:
1014 - if the process' input coding system is no-conversion or raw-text,
1015 it is a unibyte string (the non-converted input), or else
1016 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1017 string (the result of converting the decoded input multibyte
1018 string to unibyte with `string-make-unibyte'). */)
1020 register Lisp_Object process
, filter
;
1022 struct Lisp_Process
*p
;
1024 CHECK_PROCESS (process
);
1025 p
= XPROCESS (process
);
1027 /* Don't signal an error if the process' input file descriptor
1028 is closed. This could make debugging Lisp more difficult,
1029 for example when doing something like
1031 (setq process (start-process ...))
1033 (set-process-filter process ...) */
1035 if (XINT (p
->infd
) >= 0)
1037 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1039 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
1040 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
1042 else if (EQ (p
->filter
, Qt
)
1043 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
1045 FD_SET (XINT (p
->infd
), &input_wait_mask
);
1046 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
1052 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1053 setup_process_coding_systems (process
);
1057 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1059 doc
: /* Returns the filter function of PROCESS; nil if none.
1060 See `set-process-filter' for more info on filter functions. */)
1062 register Lisp_Object process
;
1064 CHECK_PROCESS (process
);
1065 return XPROCESS (process
)->filter
;
1068 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1070 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1071 The sentinel is called as a function when the process changes state.
1072 It gets two arguments: the process, and a string describing the change. */)
1074 register Lisp_Object process
, sentinel
;
1076 struct Lisp_Process
*p
;
1078 CHECK_PROCESS (process
);
1079 p
= XPROCESS (process
);
1081 p
->sentinel
= sentinel
;
1083 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1087 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1089 doc
: /* Return the sentinel of PROCESS; nil if none.
1090 See `set-process-sentinel' for more info on sentinels. */)
1092 register Lisp_Object process
;
1094 CHECK_PROCESS (process
);
1095 return XPROCESS (process
)->sentinel
;
1098 DEFUN ("set-process-window-size", Fset_process_window_size
,
1099 Sset_process_window_size
, 3, 3, 0,
1100 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1101 (process
, height
, width
)
1102 register Lisp_Object process
, height
, width
;
1104 CHECK_PROCESS (process
);
1105 CHECK_NATNUM (height
);
1106 CHECK_NATNUM (width
);
1108 if (XINT (XPROCESS (process
)->infd
) < 0
1109 || set_window_size (XINT (XPROCESS (process
)->infd
),
1110 XINT (height
), XINT (width
)) <= 0)
1116 DEFUN ("set-process-inherit-coding-system-flag",
1117 Fset_process_inherit_coding_system_flag
,
1118 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1119 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1120 If the second argument FLAG is non-nil, then the variable
1121 `buffer-file-coding-system' of the buffer associated with PROCESS
1122 will be bound to the value of the coding system used to decode
1125 This is useful when the coding system specified for the process buffer
1126 leaves either the character code conversion or the end-of-line conversion
1127 unspecified, or if the coding system used to decode the process output
1128 is more appropriate for saving the process buffer.
1130 Binding the variable `inherit-process-coding-system' to non-nil before
1131 starting the process is an alternative way of setting the inherit flag
1132 for the process which will run. */)
1134 register Lisp_Object process
, flag
;
1136 CHECK_PROCESS (process
);
1137 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
1141 DEFUN ("process-inherit-coding-system-flag",
1142 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1144 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1145 If this flag is t, `buffer-file-coding-system' of the buffer
1146 associated with PROCESS will inherit the coding system used to decode
1147 the process output. */)
1149 register Lisp_Object process
;
1151 CHECK_PROCESS (process
);
1152 return XPROCESS (process
)->inherit_coding_system_flag
;
1155 DEFUN ("set-process-query-on-exit-flag",
1156 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1158 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1159 If the second argument FLAG is non-nil, Emacs will query the user before
1160 exiting if PROCESS is running. */)
1162 register Lisp_Object process
, flag
;
1164 CHECK_PROCESS (process
);
1165 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
1169 DEFUN ("process-query-on-exit-flag",
1170 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1172 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1174 register Lisp_Object process
;
1176 CHECK_PROCESS (process
);
1177 return Fnull (XPROCESS (process
)->kill_without_query
);
1180 #ifdef DATAGRAM_SOCKETS
1181 Lisp_Object
Fprocess_datagram_address ();
1184 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1186 doc
: /* Return the contact info of PROCESS; t for a real child.
1187 For a net connection, the value depends on the optional KEY arg.
1188 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1189 if KEY is t, the complete contact information for the connection is
1190 returned, else the specific value for the keyword KEY is returned.
1191 See `make-network-process' for a list of keywords. */)
1193 register Lisp_Object process
, key
;
1195 Lisp_Object contact
;
1197 CHECK_PROCESS (process
);
1198 contact
= XPROCESS (process
)->childp
;
1200 #ifdef DATAGRAM_SOCKETS
1201 if (DATAGRAM_CONN_P (process
)
1202 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1203 contact
= Fplist_put (contact
, QCremote
,
1204 Fprocess_datagram_address (process
));
1207 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1210 return Fcons (Fplist_get (contact
, QChost
),
1211 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1212 return Fplist_get (contact
, key
);
1215 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1217 doc
: /* Return the plist of PROCESS. */)
1219 register Lisp_Object process
;
1221 CHECK_PROCESS (process
);
1222 return XPROCESS (process
)->plist
;
1225 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1227 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1229 register Lisp_Object process
, plist
;
1231 CHECK_PROCESS (process
);
1234 XPROCESS (process
)->plist
= plist
;
1238 #if 0 /* Turned off because we don't currently record this info
1239 in the process. Perhaps add it. */
1240 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1241 doc
: /* Return the connection type of PROCESS.
1242 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1243 a socket connection. */)
1245 Lisp_Object process
;
1247 return XPROCESS (process
)->type
;
1252 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1254 doc
: /* Convert network ADDRESS from internal format to a string.
1255 A 4 or 5 element vector represents an IPv4 address (with port number).
1256 An 8 or 9 element vector represents an IPv6 address (with port number).
1257 If optional second argument OMIT-PORT is non-nil, don't include a port
1258 number in the string, even when present in ADDRESS.
1259 Returns nil if format of ADDRESS is invalid. */)
1260 (address
, omit_port
)
1261 Lisp_Object address
, omit_port
;
1266 if (STRINGP (address
)) /* AF_LOCAL */
1269 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1271 register struct Lisp_Vector
*p
= XVECTOR (address
);
1272 Lisp_Object args
[10];
1275 if (p
->size
== 4 || (p
->size
== 5 && !NILP (omit_port
)))
1277 args
[0] = build_string ("%d.%d.%d.%d");
1280 else if (p
->size
== 5)
1282 args
[0] = build_string ("%d.%d.%d.%d:%d");
1285 else if (p
->size
== 8 || (p
->size
== 9 && !NILP (omit_port
)))
1287 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1290 else if (p
->size
== 9)
1292 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1298 for (i
= 0; i
< nargs
; i
++)
1300 EMACS_INT element
= XINT (p
->contents
[i
]);
1302 if (element
< 0 || element
> 65535)
1305 if (nargs
<= 5 /* IPv4 */
1306 && i
< 4 /* host, not port */
1310 args
[i
+1] = p
->contents
[i
];
1313 return Fformat (nargs
+1, args
);
1316 if (CONSP (address
))
1318 Lisp_Object args
[2];
1319 args
[0] = build_string ("<Family %d>");
1320 args
[1] = Fcar (address
);
1321 return Fformat (2, args
);
1329 list_processes_1 (query_only
)
1330 Lisp_Object query_only
;
1332 register Lisp_Object tail
, tem
;
1333 Lisp_Object proc
, minspace
, tem1
;
1334 register struct Lisp_Process
*p
;
1336 int w_proc
, w_buffer
, w_tty
;
1338 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1340 w_proc
= 4; /* Proc */
1341 w_buffer
= 6; /* Buffer */
1342 w_tty
= 0; /* Omit if no ttys */
1344 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1348 proc
= Fcdr (Fcar (tail
));
1349 p
= XPROCESS (proc
);
1350 if (NILP (p
->childp
))
1352 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1354 if (STRINGP (p
->name
)
1355 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1357 if (!NILP (p
->buffer
))
1359 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1360 w_buffer
= 8; /* (Killed) */
1361 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1364 if (STRINGP (p
->tty_name
)
1365 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1369 XSETFASTINT (i_status
, w_proc
+ 1);
1370 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1373 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1374 XSETFASTINT (i_command
, XFASTINT (i_tty
) + w_tty
+ 1);
1379 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1382 XSETFASTINT (minspace
, 1);
1384 set_buffer_internal (XBUFFER (Vstandard_output
));
1385 current_buffer
->undo_list
= Qt
;
1387 current_buffer
->truncate_lines
= Qt
;
1389 write_string ("Proc", -1);
1390 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1391 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1394 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1396 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1397 write_string ("\n", -1);
1399 write_string ("----", -1);
1400 Findent_to (i_status
, minspace
); write_string ("------", -1);
1401 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1404 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1406 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1407 write_string ("\n", -1);
1409 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1413 proc
= Fcdr (Fcar (tail
));
1414 p
= XPROCESS (proc
);
1415 if (NILP (p
->childp
))
1417 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1420 Finsert (1, &p
->name
);
1421 Findent_to (i_status
, minspace
);
1423 if (p
->raw_status_new
)
1426 if (CONSP (p
->status
))
1427 symbol
= XCAR (p
->status
);
1429 if (EQ (symbol
, Qsignal
))
1432 tem
= Fcar (Fcdr (p
->status
));
1434 if (XINT (tem
) < NSIG
)
1435 write_string (sys_errlist
[XINT (tem
)], -1);
1438 Fprinc (symbol
, Qnil
);
1440 else if (NETCONN1_P (p
))
1442 if (EQ (symbol
, Qexit
))
1443 write_string ("closed", -1);
1444 else if (EQ (p
->command
, Qt
))
1445 write_string ("stopped", -1);
1446 else if (EQ (symbol
, Qrun
))
1447 write_string ("open", -1);
1449 Fprinc (symbol
, Qnil
);
1452 Fprinc (symbol
, Qnil
);
1454 if (EQ (symbol
, Qexit
))
1457 tem
= Fcar (Fcdr (p
->status
));
1460 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1461 write_string (tembuf
, -1);
1465 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
) || EQ (symbol
, Qclosed
))
1468 Findent_to (i_buffer
, minspace
);
1469 if (NILP (p
->buffer
))
1470 insert_string ("(none)");
1471 else if (NILP (XBUFFER (p
->buffer
)->name
))
1472 insert_string ("(Killed)");
1474 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1478 Findent_to (i_tty
, minspace
);
1479 if (STRINGP (p
->tty_name
))
1480 Finsert (1, &p
->tty_name
);
1483 Findent_to (i_command
, minspace
);
1485 if (EQ (p
->status
, Qlisten
))
1487 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1488 if (INTEGERP (port
))
1489 port
= Fnumber_to_string (port
);
1491 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1492 sprintf (tembuf
, "(network %s server on %s)\n",
1493 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1494 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1495 insert_string (tembuf
);
1497 else if (NETCONN1_P (p
))
1499 /* For a local socket, there is no host name,
1500 so display service instead. */
1501 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1502 if (!STRINGP (host
))
1504 host
= Fplist_get (p
->childp
, QCservice
);
1505 if (INTEGERP (host
))
1506 host
= Fnumber_to_string (host
);
1509 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1510 sprintf (tembuf
, "(network %s connection to %s)\n",
1511 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1512 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1513 insert_string (tembuf
);
1525 insert_string (" ");
1527 insert_string ("\n");
1531 status_notify (NULL
);
1535 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1536 doc
: /* Display a list of all processes.
1537 If optional argument QUERY-ONLY is non-nil, only processes with
1538 the query-on-exit flag set will be listed.
1539 Any process listed as exited or signaled is actually eliminated
1540 after the listing is made. */)
1542 Lisp_Object query_only
;
1544 internal_with_output_to_temp_buffer ("*Process List*",
1545 list_processes_1
, query_only
);
1549 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1550 doc
: /* Return a list of all processes. */)
1553 return Fmapcar (Qcdr
, Vprocess_alist
);
1556 /* Starting asynchronous inferior processes. */
1558 static Lisp_Object
start_process_unwind ();
1560 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1561 doc
: /* Start a program in a subprocess. Return the process object for it.
1562 NAME is name for process. It is modified if necessary to make it unique.
1563 BUFFER is the buffer (or buffer name) to associate with the process.
1565 Process output (both standard output and standard error streams) goes
1566 at end of BUFFER, unless you specify an output stream or filter
1567 function to handle the output. BUFFER may also be nil, meaning that
1568 this process is not associated with any buffer.
1570 PROGRAM is the program file name. It is searched for in PATH.
1571 Remaining arguments are strings to give program as arguments.
1573 If you want to separate standard output from standard error, invoke
1574 the command through a shell and redirect one of them using the shell
1577 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1580 register Lisp_Object
*args
;
1582 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1584 register unsigned char *new_argv
;
1587 register unsigned char **new_argv
;
1590 int count
= SPECPDL_INDEX ();
1594 buffer
= Fget_buffer_create (buffer
);
1596 /* Make sure that the child will be able to chdir to the current
1597 buffer's current directory, or its unhandled equivalent. We
1598 can't just have the child check for an error when it does the
1599 chdir, since it's in a vfork.
1601 We have to GCPRO around this because Fexpand_file_name and
1602 Funhandled_file_name_directory might call a file name handling
1603 function. The argument list is protected by the caller, so all
1604 we really have to worry about is buffer. */
1606 struct gcpro gcpro1
, gcpro2
;
1608 current_dir
= current_buffer
->directory
;
1610 GCPRO2 (buffer
, current_dir
);
1613 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1615 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1616 report_file_error ("Setting current directory",
1617 Fcons (current_buffer
->directory
, Qnil
));
1623 CHECK_STRING (name
);
1627 CHECK_STRING (program
);
1629 proc
= make_process (name
);
1630 /* If an error occurs and we can't start the process, we want to
1631 remove it from the process list. This means that each error
1632 check in create_process doesn't need to call remove_process
1633 itself; it's all taken care of here. */
1634 record_unwind_protect (start_process_unwind
, proc
);
1636 XPROCESS (proc
)->childp
= Qt
;
1637 XPROCESS (proc
)->plist
= Qnil
;
1638 XPROCESS (proc
)->buffer
= buffer
;
1639 XPROCESS (proc
)->sentinel
= Qnil
;
1640 XPROCESS (proc
)->filter
= Qnil
;
1641 XPROCESS (proc
)->filter_multibyte
1642 = buffer_defaults
.enable_multibyte_characters
;
1643 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1645 #ifdef ADAPTIVE_READ_BUFFERING
1646 XPROCESS (proc
)->adaptive_read_buffering
= Vprocess_adaptive_read_buffering
;
1649 /* Make the process marker point into the process buffer (if any). */
1650 if (BUFFERP (buffer
))
1651 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1652 BUF_ZV (XBUFFER (buffer
)),
1653 BUF_ZV_BYTE (XBUFFER (buffer
)));
1656 /* Decide coding systems for communicating with the process. Here
1657 we don't setup the structure coding_system nor pay attention to
1658 unibyte mode. They are done in create_process. */
1660 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1661 Lisp_Object coding_systems
= Qt
;
1662 Lisp_Object val
, *args2
;
1663 struct gcpro gcpro1
, gcpro2
;
1665 val
= Vcoding_system_for_read
;
1668 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1669 args2
[0] = Qstart_process
;
1670 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1671 GCPRO2 (proc
, current_dir
);
1672 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1674 if (CONSP (coding_systems
))
1675 val
= XCAR (coding_systems
);
1676 else if (CONSP (Vdefault_process_coding_system
))
1677 val
= XCAR (Vdefault_process_coding_system
);
1679 XPROCESS (proc
)->decode_coding_system
= val
;
1681 val
= Vcoding_system_for_write
;
1684 if (EQ (coding_systems
, Qt
))
1686 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1687 args2
[0] = Qstart_process
;
1688 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1689 GCPRO2 (proc
, current_dir
);
1690 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1693 if (CONSP (coding_systems
))
1694 val
= XCDR (coding_systems
);
1695 else if (CONSP (Vdefault_process_coding_system
))
1696 val
= XCDR (Vdefault_process_coding_system
);
1698 XPROCESS (proc
)->encode_coding_system
= val
;
1702 /* Make a one member argv with all args concatenated
1703 together separated by a blank. */
1704 len
= SBYTES (program
) + 2;
1705 for (i
= 3; i
< nargs
; i
++)
1709 len
+= SBYTES (tem
) + 1; /* count the blank */
1711 new_argv
= (unsigned char *) alloca (len
);
1712 strcpy (new_argv
, SDATA (program
));
1713 for (i
= 3; i
< nargs
; i
++)
1717 strcat (new_argv
, " ");
1718 strcat (new_argv
, SDATA (tem
));
1720 /* Need to add code here to check for program existence on VMS */
1723 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1725 /* If program file name is not absolute, search our path for it.
1726 Put the name we will really use in TEM. */
1727 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1728 && !(SCHARS (program
) > 1
1729 && IS_DEVICE_SEP (SREF (program
, 1))))
1731 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1734 GCPRO4 (name
, program
, buffer
, current_dir
);
1735 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1738 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1739 tem
= Fexpand_file_name (tem
, Qnil
);
1743 if (!NILP (Ffile_directory_p (program
)))
1744 error ("Specified program for new process is a directory");
1748 /* If program file name starts with /: for quoting a magic name,
1750 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1751 && SREF (tem
, 1) == ':')
1752 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1754 /* Encode the file name and put it in NEW_ARGV.
1755 That's where the child will use it to execute the program. */
1756 tem
= ENCODE_FILE (tem
);
1757 new_argv
[0] = SDATA (tem
);
1759 /* Here we encode arguments by the coding system used for sending
1760 data to the process. We don't support using different coding
1761 systems for encoding arguments and for encoding data sent to the
1764 for (i
= 3; i
< nargs
; i
++)
1768 if (STRING_MULTIBYTE (tem
))
1769 tem
= (code_convert_string_norecord
1770 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1771 new_argv
[i
- 2] = SDATA (tem
);
1773 new_argv
[i
- 2] = 0;
1774 #endif /* not VMS */
1776 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1777 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1778 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1779 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1781 XPROCESS (proc
)->inherit_coding_system_flag
1782 = (NILP (buffer
) || !inherit_process_coding_system
1785 create_process (proc
, (char **) new_argv
, current_dir
);
1787 return unbind_to (count
, proc
);
1790 /* This function is the unwind_protect form for Fstart_process. If
1791 PROC doesn't have its pid set, then we know someone has signaled
1792 an error and the process wasn't started successfully, so we should
1793 remove it from the process list. */
1795 start_process_unwind (proc
)
1798 if (!PROCESSP (proc
))
1801 /* Was PROC started successfully? */
1802 if (XPROCESS (proc
)->pid
<= 0)
1803 remove_process (proc
);
1809 create_process_1 (timer
)
1810 struct atimer
*timer
;
1812 /* Nothing to do. */
1816 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1819 /* Mimic blocking of signals on system V, which doesn't really have it. */
1821 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1822 int sigchld_deferred
;
1825 create_process_sigchld ()
1827 signal (SIGCHLD
, create_process_sigchld
);
1829 sigchld_deferred
= 1;
1835 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1837 create_process (process
, new_argv
, current_dir
)
1838 Lisp_Object process
;
1840 Lisp_Object current_dir
;
1842 int inchannel
, outchannel
;
1845 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1846 int wait_child_setup
[2];
1848 #ifdef POSIX_SIGNALS
1851 struct sigaction sigint_action
;
1852 struct sigaction sigquit_action
;
1854 struct sigaction sighup_action
;
1856 #else /* !POSIX_SIGNALS */
1859 SIGTYPE (*sigchld
)();
1862 #endif /* !POSIX_SIGNALS */
1863 /* Use volatile to protect variables from being clobbered by longjmp. */
1864 volatile int forkin
, forkout
;
1865 volatile int pty_flag
= 0;
1867 extern char **environ
;
1870 inchannel
= outchannel
= -1;
1873 if (!NILP (Vprocess_connection_type
))
1874 outchannel
= inchannel
= allocate_pty ();
1878 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1879 /* On most USG systems it does not work to open the pty's tty here,
1880 then close it and reopen it in the child. */
1882 /* Don't let this terminal become our controlling terminal
1883 (in case we don't have one). */
1884 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1886 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1889 report_file_error ("Opening pty", Qnil
);
1891 forkin
= forkout
= -1;
1892 #endif /* not USG, or USG_SUBTTY_WORKS */
1896 #endif /* HAVE_PTYS */
1899 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1900 report_file_error ("Opening socketpair", Qnil
);
1901 outchannel
= inchannel
= sv
[0];
1902 forkout
= forkin
= sv
[1];
1904 #else /* not SKTPAIR */
1909 report_file_error ("Creating pipe", Qnil
);
1915 emacs_close (inchannel
);
1916 emacs_close (forkout
);
1917 report_file_error ("Creating pipe", Qnil
);
1922 #endif /* not SKTPAIR */
1924 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1928 tem
= pipe (wait_child_setup
);
1930 report_file_error ("Creating pipe", Qnil
);
1931 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1933 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1936 emacs_close (wait_child_setup
[0]);
1937 emacs_close (wait_child_setup
[1]);
1938 report_file_error ("Setting file descriptor flags", Qnil
);
1944 /* Replaced by close_process_descs */
1945 set_exclusive_use (inchannel
);
1946 set_exclusive_use (outchannel
);
1949 /* Stride people say it's a mystery why this is needed
1950 as well as the O_NDELAY, but that it fails without this. */
1951 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1954 ioctl (inchannel
, FIONBIO
, &one
);
1959 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1960 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1963 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1964 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1968 /* Record this as an active process, with its channels.
1969 As a result, child_setup will close Emacs's side of the pipes. */
1970 chan_process
[inchannel
] = process
;
1971 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1972 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1974 /* Previously we recorded the tty descriptor used in the subprocess.
1975 It was only used for getting the foreground tty process, so now
1976 we just reopen the device (see emacs_get_tty_pgrp) as this is
1977 more portable (see USG_SUBTTY_WORKS above). */
1979 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1980 XPROCESS (process
)->status
= Qrun
;
1981 setup_process_coding_systems (process
);
1983 /* Delay interrupts until we have a chance to store
1984 the new fork's pid in its process structure */
1985 #ifdef POSIX_SIGNALS
1986 sigemptyset (&blocked
);
1988 sigaddset (&blocked
, SIGCHLD
);
1990 #ifdef HAVE_WORKING_VFORK
1991 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1992 this sets the parent's signal handlers as well as the child's.
1993 So delay all interrupts whose handlers the child might munge,
1994 and record the current handlers so they can be restored later. */
1995 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1996 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1998 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
2000 #endif /* HAVE_WORKING_VFORK */
2001 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
2002 #else /* !POSIX_SIGNALS */
2006 #else /* not BSD4_1 */
2007 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2008 sigsetmask (sigmask (SIGCHLD
));
2009 #else /* ordinary USG */
2011 sigchld_deferred
= 0;
2012 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
2014 #endif /* ordinary USG */
2015 #endif /* not BSD4_1 */
2016 #endif /* SIGCHLD */
2017 #endif /* !POSIX_SIGNALS */
2019 FD_SET (inchannel
, &input_wait_mask
);
2020 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2021 if (inchannel
> max_process_desc
)
2022 max_process_desc
= inchannel
;
2024 /* Until we store the proper pid, enable sigchld_handler
2025 to recognize an unknown pid as standing for this process.
2026 It is very important not to let this `marker' value stay
2027 in the table after this function has returned; if it does
2028 it might cause call-process to hang and subsequent asynchronous
2029 processes to get their return values scrambled. */
2030 XPROCESS (process
)->pid
= -1;
2035 /* child_setup must clobber environ on systems with true vfork.
2036 Protect it from permanent change. */
2037 char **save_environ
= environ
;
2039 current_dir
= ENCODE_FILE (current_dir
);
2044 #endif /* not WINDOWSNT */
2046 int xforkin
= forkin
;
2047 int xforkout
= forkout
;
2049 #if 0 /* This was probably a mistake--it duplicates code later on,
2050 but fails to handle all the cases. */
2051 /* Make sure SIGCHLD is not blocked in the child. */
2052 sigsetmask (SIGEMPTYMASK
);
2055 /* Make the pty be the controlling terminal of the process. */
2057 /* First, disconnect its current controlling terminal. */
2059 /* We tried doing setsid only if pty_flag, but it caused
2060 process_set_signal to fail on SGI when using a pipe. */
2062 /* Make the pty's terminal the controlling terminal. */
2066 /* We ignore the return value
2067 because faith@cs.unc.edu says that is necessary on Linux. */
2068 ioctl (xforkin
, TIOCSCTTY
, 0);
2071 #else /* not HAVE_SETSID */
2073 /* It's very important to call setpgrp here and no time
2074 afterwards. Otherwise, we lose our controlling tty which
2075 is set when we open the pty. */
2078 #endif /* not HAVE_SETSID */
2079 #if defined (HAVE_TERMIOS) && defined (LDISC1)
2080 if (pty_flag
&& xforkin
>= 0)
2083 tcgetattr (xforkin
, &t
);
2085 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
2086 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
2089 #if defined (NTTYDISC) && defined (TIOCSETD)
2090 if (pty_flag
&& xforkin
>= 0)
2092 /* Use new line discipline. */
2093 int ldisc
= NTTYDISC
;
2094 ioctl (xforkin
, TIOCSETD
, &ldisc
);
2099 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
2100 can do TIOCSPGRP only to the process's controlling tty. */
2103 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
2104 I can't test it since I don't have 4.3. */
2105 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
2106 ioctl (j
, TIOCNOTTY
, 0);
2109 /* In order to get a controlling terminal on some versions
2110 of BSD, it is necessary to put the process in pgrp 0
2111 before it opens the terminal. */
2119 #endif /* TIOCNOTTY */
2121 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2122 /*** There is a suggestion that this ought to be a
2123 conditional on TIOCSPGRP,
2124 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2125 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2126 that system does seem to need this code, even though
2127 both HAVE_SETSID and TIOCSCTTY are defined. */
2128 /* Now close the pty (if we had it open) and reopen it.
2129 This makes the pty the controlling terminal of the subprocess. */
2132 #ifdef SET_CHILD_PTY_PGRP
2133 int pgrp
= getpid ();
2136 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2139 emacs_close (xforkin
);
2140 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2144 emacs_write (1, "Couldn't open the pty terminal ", 31);
2145 emacs_write (1, pty_name
, strlen (pty_name
));
2146 emacs_write (1, "\n", 1);
2150 #ifdef SET_CHILD_PTY_PGRP
2151 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2152 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2155 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2157 #ifdef SETUP_SLAVE_PTY
2162 #endif /* SETUP_SLAVE_PTY */
2164 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2165 Now reenable it in the child, so it will die when we want it to. */
2167 signal (SIGHUP
, SIG_DFL
);
2169 #endif /* HAVE_PTYS */
2171 signal (SIGINT
, SIG_DFL
);
2172 signal (SIGQUIT
, SIG_DFL
);
2174 /* Stop blocking signals in the child. */
2175 #ifdef POSIX_SIGNALS
2176 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2177 #else /* !POSIX_SIGNALS */
2181 #else /* not BSD4_1 */
2182 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2183 sigsetmask (SIGEMPTYMASK
);
2184 #else /* ordinary USG */
2186 signal (SIGCHLD
, sigchld
);
2188 #endif /* ordinary USG */
2189 #endif /* not BSD4_1 */
2190 #endif /* SIGCHLD */
2191 #endif /* !POSIX_SIGNALS */
2194 child_setup_tty (xforkout
);
2196 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2197 new_argv
, 1, current_dir
);
2198 #else /* not WINDOWSNT */
2200 emacs_close (wait_child_setup
[0]);
2202 child_setup (xforkin
, xforkout
, xforkout
,
2203 new_argv
, 1, current_dir
);
2204 #endif /* not WINDOWSNT */
2206 environ
= save_environ
;
2211 /* This runs in the Emacs process. */
2215 emacs_close (forkin
);
2216 if (forkin
!= forkout
&& forkout
>= 0)
2217 emacs_close (forkout
);
2221 /* vfork succeeded. */
2222 XPROCESS (process
)->pid
= pid
;
2225 register_child (pid
, inchannel
);
2226 #endif /* WINDOWSNT */
2228 /* If the subfork execv fails, and it exits,
2229 this close hangs. I don't know why.
2230 So have an interrupt jar it loose. */
2232 struct atimer
*timer
;
2236 EMACS_SET_SECS_USECS (offset
, 1, 0);
2237 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2240 emacs_close (forkin
);
2242 cancel_atimer (timer
);
2246 if (forkin
!= forkout
&& forkout
>= 0)
2247 emacs_close (forkout
);
2251 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2254 XPROCESS (process
)->tty_name
= Qnil
;
2256 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
2257 /* Wait for child_setup to complete in case that vfork is
2258 actually defined as fork. The descriptor wait_child_setup[1]
2259 of a pipe is closed at the child side either by close-on-exec
2260 on successful execvp or the _exit call in child_setup. */
2264 emacs_close (wait_child_setup
[1]);
2265 emacs_read (wait_child_setup
[0], &dummy
, 1);
2266 emacs_close (wait_child_setup
[0]);
2271 /* Restore the signal state whether vfork succeeded or not.
2272 (We will signal an error, below, if it failed.) */
2273 #ifdef POSIX_SIGNALS
2274 #ifdef HAVE_WORKING_VFORK
2275 /* Restore the parent's signal handlers. */
2276 sigaction (SIGINT
, &sigint_action
, 0);
2277 sigaction (SIGQUIT
, &sigquit_action
, 0);
2279 sigaction (SIGHUP
, &sighup_action
, 0);
2281 #endif /* HAVE_WORKING_VFORK */
2282 /* Stop blocking signals in the parent. */
2283 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2284 #else /* !POSIX_SIGNALS */
2288 #else /* not BSD4_1 */
2289 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2290 sigsetmask (SIGEMPTYMASK
);
2291 #else /* ordinary USG */
2293 signal (SIGCHLD
, sigchld
);
2294 /* Now really handle any of these signals
2295 that came in during this function. */
2296 if (sigchld_deferred
)
2297 kill (getpid (), SIGCHLD
);
2299 #endif /* ordinary USG */
2300 #endif /* not BSD4_1 */
2301 #endif /* SIGCHLD */
2302 #endif /* !POSIX_SIGNALS */
2304 /* Now generate the error if vfork failed. */
2306 report_file_error ("Doing vfork", Qnil
);
2308 #endif /* not VMS */
2313 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2314 The address family of sa is not included in the result. */
2317 conv_sockaddr_to_lisp (sa
, len
)
2318 struct sockaddr
*sa
;
2321 Lisp_Object address
;
2324 register struct Lisp_Vector
*p
;
2326 switch (sa
->sa_family
)
2330 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2331 len
= sizeof (sin
->sin_addr
) + 1;
2332 address
= Fmake_vector (make_number (len
), Qnil
);
2333 p
= XVECTOR (address
);
2334 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2335 cp
= (unsigned char *)&sin
->sin_addr
;
2341 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2342 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2343 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2344 address
= Fmake_vector (make_number (len
), Qnil
);
2345 p
= XVECTOR (address
);
2346 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2347 for (i
= 0; i
< len
; i
++)
2348 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2352 #ifdef HAVE_LOCAL_SOCKETS
2355 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2356 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2357 if (sockun
->sun_path
[i
] == 0)
2359 return make_unibyte_string (sockun
->sun_path
, i
);
2363 len
-= sizeof (sa
->sa_family
);
2364 address
= Fcons (make_number (sa
->sa_family
),
2365 Fmake_vector (make_number (len
), Qnil
));
2366 p
= XVECTOR (XCDR (address
));
2367 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2373 p
->contents
[i
++] = make_number (*cp
++);
2379 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2382 get_lisp_to_sockaddr_size (address
, familyp
)
2383 Lisp_Object address
;
2386 register struct Lisp_Vector
*p
;
2388 if (VECTORP (address
))
2390 p
= XVECTOR (address
);
2394 return sizeof (struct sockaddr_in
);
2397 else if (p
->size
== 9)
2399 *familyp
= AF_INET6
;
2400 return sizeof (struct sockaddr_in6
);
2404 #ifdef HAVE_LOCAL_SOCKETS
2405 else if (STRINGP (address
))
2407 *familyp
= AF_LOCAL
;
2408 return sizeof (struct sockaddr_un
);
2411 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2413 struct sockaddr
*sa
;
2414 *familyp
= XINT (XCAR (address
));
2415 p
= XVECTOR (XCDR (address
));
2416 return p
->size
+ sizeof (sa
->sa_family
);
2421 /* Convert an address object (vector or string) to an internal sockaddr.
2423 The address format has been basically validated by
2424 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2425 it could have come from user data. So if FAMILY is not valid,
2426 we return after zeroing *SA. */
2429 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2431 Lisp_Object address
;
2432 struct sockaddr
*sa
;
2435 register struct Lisp_Vector
*p
;
2436 register unsigned char *cp
= NULL
;
2441 if (VECTORP (address
))
2443 p
= XVECTOR (address
);
2444 if (family
== AF_INET
)
2446 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2447 len
= sizeof (sin
->sin_addr
) + 1;
2448 i
= XINT (p
->contents
[--len
]);
2449 sin
->sin_port
= htons (i
);
2450 cp
= (unsigned char *)&sin
->sin_addr
;
2451 sa
->sa_family
= family
;
2454 else if (family
== AF_INET6
)
2456 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2457 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2458 len
= sizeof (sin6
->sin6_addr
) + 1;
2459 i
= XINT (p
->contents
[--len
]);
2460 sin6
->sin6_port
= htons (i
);
2461 for (i
= 0; i
< len
; i
++)
2462 if (INTEGERP (p
->contents
[i
]))
2464 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2467 sa
->sa_family
= family
;
2472 else if (STRINGP (address
))
2474 #ifdef HAVE_LOCAL_SOCKETS
2475 if (family
== AF_LOCAL
)
2477 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2478 cp
= SDATA (address
);
2479 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2480 sockun
->sun_path
[i
] = *cp
++;
2481 sa
->sa_family
= family
;
2488 p
= XVECTOR (XCDR (address
));
2489 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2492 for (i
= 0; i
< len
; i
++)
2493 if (INTEGERP (p
->contents
[i
]))
2494 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2497 #ifdef DATAGRAM_SOCKETS
2498 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2500 doc
: /* Get the current datagram address associated with PROCESS. */)
2502 Lisp_Object process
;
2506 CHECK_PROCESS (process
);
2508 if (!DATAGRAM_CONN_P (process
))
2511 channel
= XINT (XPROCESS (process
)->infd
);
2512 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2513 datagram_address
[channel
].len
);
2516 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2518 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2519 Returns nil upon error setting address, ADDRESS otherwise. */)
2521 Lisp_Object process
, address
;
2526 CHECK_PROCESS (process
);
2528 if (!DATAGRAM_CONN_P (process
))
2531 channel
= XINT (XPROCESS (process
)->infd
);
2533 len
= get_lisp_to_sockaddr_size (address
, &family
);
2534 if (datagram_address
[channel
].len
!= len
)
2536 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2542 static struct socket_options
{
2543 /* The name of this option. Should be lowercase version of option
2544 name without SO_ prefix. */
2546 /* Option level SOL_... */
2548 /* Option number SO_... */
2550 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2551 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2552 } socket_options
[] =
2554 #ifdef SO_BINDTODEVICE
2555 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2558 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2561 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2564 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2567 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2570 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2573 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2576 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2578 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2581 /* Set option OPT to value VAL on socket S.
2583 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2584 Signals an error if setting a known option fails.
2588 set_socket_option (s
, opt
, val
)
2590 Lisp_Object opt
, val
;
2593 struct socket_options
*sopt
;
2598 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2599 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2600 if (strcmp (name
, sopt
->name
) == 0)
2603 switch (sopt
->opttype
)
2608 optval
= NILP (val
) ? 0 : 1;
2609 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2610 &optval
, sizeof (optval
));
2618 optval
= XINT (val
);
2620 error ("Bad option value for %s", name
);
2621 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2622 &optval
, sizeof (optval
));
2626 #ifdef SO_BINDTODEVICE
2629 char devname
[IFNAMSIZ
+1];
2631 /* This is broken, at least in the Linux 2.4 kernel.
2632 To unbind, the arg must be a zero integer, not the empty string.
2633 This should work on all systems. KFS. 2003-09-23. */
2634 bzero (devname
, sizeof devname
);
2637 char *arg
= (char *) SDATA (val
);
2638 int len
= min (strlen (arg
), IFNAMSIZ
);
2639 bcopy (arg
, devname
, len
);
2641 else if (!NILP (val
))
2642 error ("Bad option value for %s", name
);
2643 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2652 struct linger linger
;
2655 linger
.l_linger
= 0;
2657 linger
.l_linger
= XINT (val
);
2659 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2660 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2661 &linger
, sizeof (linger
));
2671 report_file_error ("Cannot set network option",
2672 Fcons (opt
, Fcons (val
, Qnil
)));
2673 return (1 << sopt
->optbit
);
2677 DEFUN ("set-network-process-option",
2678 Fset_network_process_option
, Sset_network_process_option
,
2680 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2681 See `make-network-process' for a list of options and values.
2682 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2683 OPTION is not a supported option, return nil instead; otherwise return t. */)
2684 (process
, option
, value
, no_error
)
2685 Lisp_Object process
, option
, value
;
2686 Lisp_Object no_error
;
2689 struct Lisp_Process
*p
;
2691 CHECK_PROCESS (process
);
2692 p
= XPROCESS (process
);
2693 if (!NETCONN1_P (p
))
2694 error ("Process is not a network process");
2698 error ("Process is not running");
2700 if (set_socket_option (s
, option
, value
))
2702 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2706 if (NILP (no_error
))
2707 error ("Unknown or unsupported option");
2713 /* A version of request_sigio suitable for a record_unwind_protect. */
2716 unwind_request_sigio (dummy
)
2719 if (interrupt_input
)
2724 /* Create a network stream/datagram client/server process. Treated
2725 exactly like a normal process when reading and writing. Primary
2726 differences are in status display and process deletion. A network
2727 connection has no PID; you cannot signal it. All you can do is
2728 stop/continue it and deactivate/close it via delete-process */
2730 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2732 doc
: /* Create and return a network server or client process.
2734 In Emacs, network connections are represented by process objects, so
2735 input and output work as for subprocesses and `delete-process' closes
2736 a network connection. However, a network process has no process id,
2737 it cannot be signaled, and the status codes are different from normal
2740 Arguments are specified as keyword/argument pairs. The following
2741 arguments are defined:
2743 :name NAME -- NAME is name for process. It is modified if necessary
2746 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2747 with the process. Process output goes at end of that buffer, unless
2748 you specify an output stream or filter function to handle the output.
2749 BUFFER may be also nil, meaning that this process is not associated
2752 :host HOST -- HOST is name of the host to connect to, or its IP
2753 address. The symbol `local' specifies the local host. If specified
2754 for a server process, it must be a valid name or address for the local
2755 host, and only clients connecting to that address will be accepted.
2757 :service SERVICE -- SERVICE is name of the service desired, or an
2758 integer specifying a port number to connect to. If SERVICE is t,
2759 a random port number is selected for the server. (If Emacs was
2760 compiled with getaddrinfo, a port number can also be specified as a
2761 string, e.g. "80", as well as an integer. This is not portable.)
2763 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2764 stream type connection, `datagram' creates a datagram type connection.
2766 :family FAMILY -- FAMILY is the address (and protocol) family for the
2767 service specified by HOST and SERVICE. The default (nil) is to use
2768 whatever address family (IPv4 or IPv6) that is defined for the host
2769 and port number specified by HOST and SERVICE. Other address families
2771 local -- for a local (i.e. UNIX) address specified by SERVICE.
2772 ipv4 -- use IPv4 address family only.
2773 ipv6 -- use IPv6 address family only.
2775 :local ADDRESS -- ADDRESS is the local address used for the connection.
2776 This parameter is ignored when opening a client process. When specified
2777 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2779 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2780 connection. This parameter is ignored when opening a stream server
2781 process. For a datagram server process, it specifies the initial
2782 setting of the remote datagram address. When specified for a client
2783 process, the FAMILY, HOST, and SERVICE args are ignored.
2785 The format of ADDRESS depends on the address family:
2786 - An IPv4 address is represented as an vector of integers [A B C D P]
2787 corresponding to numeric IP address A.B.C.D and port number P.
2788 - A local address is represented as a string with the address in the
2789 local address space.
2790 - An "unsupported family" address is represented by a cons (F . AV)
2791 where F is the family number and AV is a vector containing the socket
2792 address data with one element per address data byte. Do not rely on
2793 this format in portable code, as it may depend on implementation
2794 defined constants, data sizes, and data structure alignment.
2796 :coding CODING -- If CODING is a symbol, it specifies the coding
2797 system used for both reading and writing for this process. If CODING
2798 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2799 ENCODING is used for writing.
2801 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2802 return without waiting for the connection to complete; instead, the
2803 sentinel function will be called with second arg matching "open" (if
2804 successful) or "failed" when the connect completes. Default is to use
2805 a blocking connect (i.e. wait) for stream type connections.
2807 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2808 running when Emacs is exited.
2810 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2811 In the stopped state, a server process does not accept new
2812 connections, and a client process does not handle incoming traffic.
2813 The stopped state is cleared by `continue-process' and set by
2816 :filter FILTER -- Install FILTER as the process filter.
2818 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2819 process filter are multibyte, otherwise they are unibyte.
2820 If this keyword is not specified, the strings are multibyte if
2821 `default-enable-multibyte-characters' is non-nil.
2823 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2825 :log LOG -- Install LOG as the server process log function. This
2826 function is called when the server accepts a network connection from a
2827 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2828 is the server process, CLIENT is the new process for the connection,
2829 and MESSAGE is a string.
2831 :plist PLIST -- Install PLIST as the new process' initial plist.
2833 :server QLEN -- if QLEN is non-nil, create a server process for the
2834 specified FAMILY, SERVICE, and connection type (stream or datagram).
2835 If QLEN is an integer, it is used as the max. length of the server's
2836 pending connection queue (also known as the backlog); the default
2837 queue length is 5. Default is to create a client process.
2839 The following network options can be specified for this connection:
2841 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2842 :dontroute BOOL -- Only send to directly connected hosts.
2843 :keepalive BOOL -- Send keep-alive messages on network stream.
2844 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2845 :oobinline BOOL -- Place out-of-band data in receive data stream.
2846 :priority INT -- Set protocol defined priority for sent packets.
2847 :reuseaddr BOOL -- Allow reusing a recently used local address
2848 (this is allowed by default for a server process).
2849 :bindtodevice NAME -- bind to interface NAME. Using this may require
2850 special privileges on some systems.
2852 Consult the relevant system programmer's manual pages for more
2853 information on using these options.
2856 A server process will listen for and accept connections from clients.
2857 When a client connection is accepted, a new network process is created
2858 for the connection with the following parameters:
2860 - The client's process name is constructed by concatenating the server
2861 process' NAME and a client identification string.
2862 - If the FILTER argument is non-nil, the client process will not get a
2863 separate process buffer; otherwise, the client's process buffer is a newly
2864 created buffer named after the server process' BUFFER name or process
2865 NAME concatenated with the client identification string.
2866 - The connection type and the process filter and sentinel parameters are
2867 inherited from the server process' TYPE, FILTER and SENTINEL.
2868 - The client process' contact info is set according to the client's
2869 addressing information (typically an IP address and a port number).
2870 - The client process' plist is initialized from the server's plist.
2872 Notice that the FILTER and SENTINEL args are never used directly by
2873 the server process. Also, the BUFFER argument is not used directly by
2874 the server process, but via the optional :log function, accepted (and
2875 failed) connections may be logged in the server process' buffer.
2877 The original argument list, modified with the actual connection
2878 information, is available via the `process-contact' function.
2880 usage: (make-network-process &rest ARGS) */)
2886 Lisp_Object contact
;
2887 struct Lisp_Process
*p
;
2888 #ifdef HAVE_GETADDRINFO
2889 struct addrinfo ai
, *res
, *lres
;
2890 struct addrinfo hints
;
2891 char *portstring
, portbuf
[128];
2892 #else /* HAVE_GETADDRINFO */
2893 struct _emacs_addrinfo
2899 struct sockaddr
*ai_addr
;
2900 struct _emacs_addrinfo
*ai_next
;
2902 #endif /* HAVE_GETADDRINFO */
2903 struct sockaddr_in address_in
;
2904 #ifdef HAVE_LOCAL_SOCKETS
2905 struct sockaddr_un address_un
;
2910 int s
= -1, outch
, inch
;
2911 struct gcpro gcpro1
;
2912 int count
= SPECPDL_INDEX ();
2914 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2916 Lisp_Object name
, buffer
, host
, service
, address
;
2917 Lisp_Object filter
, sentinel
;
2918 int is_non_blocking_client
= 0;
2919 int is_server
= 0, backlog
= 5;
2926 /* Save arguments for process-contact and clone-process. */
2927 contact
= Flist (nargs
, args
);
2931 /* Ensure socket support is loaded if available. */
2932 init_winsock (TRUE
);
2935 /* :type TYPE (nil: stream, datagram */
2936 tem
= Fplist_get (contact
, QCtype
);
2938 socktype
= SOCK_STREAM
;
2939 #ifdef DATAGRAM_SOCKETS
2940 else if (EQ (tem
, Qdatagram
))
2941 socktype
= SOCK_DGRAM
;
2944 error ("Unsupported connection type");
2947 tem
= Fplist_get (contact
, QCserver
);
2950 /* Don't support network sockets when non-blocking mode is
2951 not available, since a blocked Emacs is not useful. */
2952 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2953 error ("Network servers not supported");
2957 backlog
= XINT (tem
);
2961 /* Make QCaddress an alias for :local (server) or :remote (client). */
2962 QCaddress
= is_server
? QClocal
: QCremote
;
2965 if (!is_server
&& socktype
== SOCK_STREAM
2966 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2968 #ifndef NON_BLOCKING_CONNECT
2969 error ("Non-blocking connect not supported");
2971 is_non_blocking_client
= 1;
2975 name
= Fplist_get (contact
, QCname
);
2976 buffer
= Fplist_get (contact
, QCbuffer
);
2977 filter
= Fplist_get (contact
, QCfilter
);
2978 sentinel
= Fplist_get (contact
, QCsentinel
);
2980 CHECK_STRING (name
);
2983 /* Let's handle TERM before things get complicated ... */
2984 host
= Fplist_get (contact
, QChost
);
2985 CHECK_STRING (host
);
2987 service
= Fplist_get (contact
, QCservice
);
2988 if (INTEGERP (service
))
2989 port
= htons ((unsigned short) XINT (service
));
2992 struct servent
*svc_info
;
2993 CHECK_STRING (service
);
2994 svc_info
= getservbyname (SDATA (service
), "tcp");
2996 error ("Unknown service: %s", SDATA (service
));
2997 port
= svc_info
->s_port
;
3000 s
= connect_server (0);
3002 report_file_error ("error creating socket", Fcons (name
, Qnil
));
3003 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
3004 send_command (s
, C_DUMB
, 1, 0);
3006 #else /* not TERM */
3008 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3009 ai
.ai_socktype
= socktype
;
3014 /* :local ADDRESS or :remote ADDRESS */
3015 address
= Fplist_get (contact
, QCaddress
);
3016 if (!NILP (address
))
3018 host
= service
= Qnil
;
3020 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3021 error ("Malformed :address");
3022 ai
.ai_family
= family
;
3023 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3024 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3028 /* :family FAMILY -- nil (for Inet), local, or integer. */
3029 tem
= Fplist_get (contact
, QCfamily
);
3032 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3038 #ifdef HAVE_LOCAL_SOCKETS
3039 else if (EQ (tem
, Qlocal
))
3043 else if (EQ (tem
, Qipv6
))
3046 else if (EQ (tem
, Qipv4
))
3048 else if (INTEGERP (tem
))
3049 family
= XINT (tem
);
3051 error ("Unknown address family");
3053 ai
.ai_family
= family
;
3055 /* :service SERVICE -- string, integer (port number), or t (random port). */
3056 service
= Fplist_get (contact
, QCservice
);
3058 #ifdef HAVE_LOCAL_SOCKETS
3059 if (family
== AF_LOCAL
)
3061 /* Host is not used. */
3063 CHECK_STRING (service
);
3064 bzero (&address_un
, sizeof address_un
);
3065 address_un
.sun_family
= AF_LOCAL
;
3066 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
3067 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3068 ai
.ai_addrlen
= sizeof address_un
;
3073 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3074 host
= Fplist_get (contact
, QChost
);
3077 if (EQ (host
, Qlocal
))
3078 host
= build_string ("localhost");
3079 CHECK_STRING (host
);
3082 /* Slow down polling to every ten seconds.
3083 Some kernels have a bug which causes retrying connect to fail
3084 after a connect. Polling can interfere with gethostbyname too. */
3085 #ifdef POLL_FOR_INPUT
3086 if (socktype
== SOCK_STREAM
)
3088 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3089 bind_polling_period (10);
3093 #ifdef HAVE_GETADDRINFO
3094 /* If we have a host, use getaddrinfo to resolve both host and service.
3095 Otherwise, use getservbyname to lookup the service. */
3099 /* SERVICE can either be a string or int.
3100 Convert to a C string for later use by getaddrinfo. */
3101 if (EQ (service
, Qt
))
3103 else if (INTEGERP (service
))
3105 sprintf (portbuf
, "%ld", (long) XINT (service
));
3106 portstring
= portbuf
;
3110 CHECK_STRING (service
);
3111 portstring
= SDATA (service
);
3116 memset (&hints
, 0, sizeof (hints
));
3118 hints
.ai_family
= family
;
3119 hints
.ai_socktype
= socktype
;
3120 hints
.ai_protocol
= 0;
3121 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
3123 #ifdef HAVE_GAI_STRERROR
3124 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
3126 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
3132 #endif /* HAVE_GETADDRINFO */
3134 /* We end up here if getaddrinfo is not defined, or in case no hostname
3135 has been specified (e.g. for a local server process). */
3137 if (EQ (service
, Qt
))
3139 else if (INTEGERP (service
))
3140 port
= htons ((unsigned short) XINT (service
));
3143 struct servent
*svc_info
;
3144 CHECK_STRING (service
);
3145 svc_info
= getservbyname (SDATA (service
),
3146 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3148 error ("Unknown service: %s", SDATA (service
));
3149 port
= svc_info
->s_port
;
3152 bzero (&address_in
, sizeof address_in
);
3153 address_in
.sin_family
= family
;
3154 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3155 address_in
.sin_port
= port
;
3157 #ifndef HAVE_GETADDRINFO
3160 struct hostent
*host_info_ptr
;
3162 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3163 as it may `hang' Emacs for a very long time. */
3166 host_info_ptr
= gethostbyname (SDATA (host
));
3171 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
3172 host_info_ptr
->h_length
);
3173 family
= host_info_ptr
->h_addrtype
;
3174 address_in
.sin_family
= family
;
3177 /* Attempt to interpret host as numeric inet address */
3179 IN_ADDR numeric_addr
;
3180 numeric_addr
= inet_addr ((char *) SDATA (host
));
3181 if (NUMERIC_ADDR_ERROR
)
3182 error ("Unknown host \"%s\"", SDATA (host
));
3184 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
3185 sizeof (address_in
.sin_addr
));
3189 #endif /* not HAVE_GETADDRINFO */
3191 ai
.ai_family
= family
;
3192 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3193 ai
.ai_addrlen
= sizeof address_in
;
3197 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3198 when connect is interrupted. So let's not let it get interrupted.
3199 Note we do not turn off polling, because polling is only used
3200 when not interrupt_input, and thus not normally used on the systems
3201 which have this bug. On systems which use polling, there's no way
3202 to quit if polling is turned off. */
3204 && !is_server
&& socktype
== SOCK_STREAM
)
3206 /* Comment from KFS: The original open-network-stream code
3207 didn't unwind protect this, but it seems like the proper
3208 thing to do. In any case, I don't see how it could harm to
3209 do this -- and it makes cleanup (using unbind_to) easier. */
3210 record_unwind_protect (unwind_request_sigio
, Qnil
);
3214 /* Do this in case we never enter the for-loop below. */
3215 count1
= SPECPDL_INDEX ();
3218 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3224 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3231 #ifdef DATAGRAM_SOCKETS
3232 if (!is_server
&& socktype
== SOCK_DGRAM
)
3234 #endif /* DATAGRAM_SOCKETS */
3236 #ifdef NON_BLOCKING_CONNECT
3237 if (is_non_blocking_client
)
3240 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3242 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3254 /* Make us close S if quit. */
3255 record_unwind_protect (close_file_unwind
, make_number (s
));
3257 /* Parse network options in the arg list.
3258 We simply ignore anything which isn't a known option (including other keywords).
3259 An error is signalled if setting a known option fails. */
3260 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3261 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3265 /* Configure as a server socket. */
3267 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3268 explicit :reuseaddr key to override this. */
3269 #ifdef HAVE_LOCAL_SOCKETS
3270 if (family
!= AF_LOCAL
)
3272 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3275 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3276 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3279 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3280 report_file_error ("Cannot bind server socket", Qnil
);
3282 #ifdef HAVE_GETSOCKNAME
3283 if (EQ (service
, Qt
))
3285 struct sockaddr_in sa1
;
3286 int len1
= sizeof (sa1
);
3287 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3289 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3290 service
= make_number (ntohs (sa1
.sin_port
));
3291 contact
= Fplist_put (contact
, QCservice
, service
);
3296 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3297 report_file_error ("Cannot listen on server socket", Qnil
);
3305 /* This turns off all alarm-based interrupts; the
3306 bind_polling_period call above doesn't always turn all the
3307 short-interval ones off, especially if interrupt_input is
3310 It'd be nice to be able to control the connect timeout
3311 though. Would non-blocking connect calls be portable?
3313 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3315 turn_on_atimers (0);
3317 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3320 turn_on_atimers (1);
3322 if (ret
== 0 || xerrno
== EISCONN
)
3324 /* The unwind-protect will be discarded afterwards.
3325 Likewise for immediate_quit. */
3329 #ifdef NON_BLOCKING_CONNECT
3331 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3335 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3343 /* Discard the unwind protect closing S. */
3344 specpdl_ptr
= specpdl
+ count1
;
3348 if (xerrno
== EINTR
)
3354 #ifdef DATAGRAM_SOCKETS
3355 if (socktype
== SOCK_DGRAM
)
3357 if (datagram_address
[s
].sa
)
3359 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3360 datagram_address
[s
].len
= lres
->ai_addrlen
;
3364 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3365 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3368 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3369 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3370 conv_lisp_to_sockaddr (rfamily
, remote
,
3371 datagram_address
[s
].sa
, rlen
);
3375 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3378 contact
= Fplist_put (contact
, QCaddress
,
3379 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3380 #ifdef HAVE_GETSOCKNAME
3383 struct sockaddr_in sa1
;
3384 int len1
= sizeof (sa1
);
3385 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3386 contact
= Fplist_put (contact
, QClocal
,
3387 conv_sockaddr_to_lisp (&sa1
, len1
));
3394 #ifdef HAVE_GETADDRINFO
3403 /* Discard the unwind protect for closing S, if any. */
3404 specpdl_ptr
= specpdl
+ count1
;
3406 /* Unwind bind_polling_period and request_sigio. */
3407 unbind_to (count
, Qnil
);
3411 /* If non-blocking got this far - and failed - assume non-blocking is
3412 not supported after all. This is probably a wrong assumption, but
3413 the normal blocking calls to open-network-stream handles this error
3415 if (is_non_blocking_client
)
3420 report_file_error ("make server process failed", contact
);
3422 report_file_error ("make client process failed", contact
);
3425 #endif /* not TERM */
3431 buffer
= Fget_buffer_create (buffer
);
3432 proc
= make_process (name
);
3434 chan_process
[inch
] = proc
;
3437 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3440 fcntl (inch
, F_SETFL
, O_NDELAY
);
3444 p
= XPROCESS (proc
);
3446 p
->childp
= contact
;
3447 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3450 p
->sentinel
= sentinel
;
3452 p
->filter_multibyte
= buffer_defaults
.enable_multibyte_characters
;
3453 /* Override the above only if :filter-multibyte is specified. */
3454 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3455 p
->filter_multibyte
= Fplist_get (contact
, QCfilter_multibyte
);
3456 p
->log
= Fplist_get (contact
, QClog
);
3457 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3458 p
->kill_without_query
= Qt
;
3459 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3462 XSETINT (p
->infd
, inch
);
3463 XSETINT (p
->outfd
, outch
);
3464 if (is_server
&& socktype
== SOCK_STREAM
)
3465 p
->status
= Qlisten
;
3467 /* Make the process marker point into the process buffer (if any). */
3468 if (BUFFERP (buffer
))
3469 set_marker_both (p
->mark
, buffer
,
3470 BUF_ZV (XBUFFER (buffer
)),
3471 BUF_ZV_BYTE (XBUFFER (buffer
)));
3473 #ifdef NON_BLOCKING_CONNECT
3474 if (is_non_blocking_client
)
3476 /* We may get here if connect did succeed immediately. However,
3477 in that case, we still need to signal this like a non-blocking
3479 p
->status
= Qconnect
;
3480 if (!FD_ISSET (inch
, &connect_wait_mask
))
3482 FD_SET (inch
, &connect_wait_mask
);
3483 num_pending_connects
++;
3488 /* A server may have a client filter setting of Qt, but it must
3489 still listen for incoming connects unless it is stopped. */
3490 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3491 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3493 FD_SET (inch
, &input_wait_mask
);
3494 FD_SET (inch
, &non_keyboard_wait_mask
);
3497 if (inch
> max_process_desc
)
3498 max_process_desc
= inch
;
3500 tem
= Fplist_member (contact
, QCcoding
);
3501 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3502 tem
= Qnil
; /* No error message (too late!). */
3505 /* Setup coding systems for communicating with the network stream. */
3506 struct gcpro gcpro1
;
3507 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3508 Lisp_Object coding_systems
= Qt
;
3509 Lisp_Object args
[5], val
;
3513 val
= XCAR (XCDR (tem
));
3517 else if (!NILP (Vcoding_system_for_read
))
3518 val
= Vcoding_system_for_read
;
3519 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3520 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3521 /* We dare not decode end-of-line format by setting VAL to
3522 Qraw_text, because the existing Emacs Lisp libraries
3523 assume that they receive bare code including a sequene of
3528 if (NILP (host
) || NILP (service
))
3529 coding_systems
= Qnil
;
3532 args
[0] = Qopen_network_stream
, args
[1] = name
,
3533 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3535 coding_systems
= Ffind_operation_coding_system (5, args
);
3538 if (CONSP (coding_systems
))
3539 val
= XCAR (coding_systems
);
3540 else if (CONSP (Vdefault_process_coding_system
))
3541 val
= XCAR (Vdefault_process_coding_system
);
3545 p
->decode_coding_system
= val
;
3549 val
= XCAR (XCDR (tem
));
3553 else if (!NILP (Vcoding_system_for_write
))
3554 val
= Vcoding_system_for_write
;
3555 else if (NILP (current_buffer
->enable_multibyte_characters
))
3559 if (EQ (coding_systems
, Qt
))
3561 if (NILP (host
) || NILP (service
))
3562 coding_systems
= Qnil
;
3565 args
[0] = Qopen_network_stream
, args
[1] = name
,
3566 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3568 coding_systems
= Ffind_operation_coding_system (5, args
);
3572 if (CONSP (coding_systems
))
3573 val
= XCDR (coding_systems
);
3574 else if (CONSP (Vdefault_process_coding_system
))
3575 val
= XCDR (Vdefault_process_coding_system
);
3579 p
->encode_coding_system
= val
;
3581 setup_process_coding_systems (proc
);
3583 p
->decoding_buf
= make_uninit_string (0);
3584 p
->decoding_carryover
= make_number (0);
3585 p
->encoding_buf
= make_uninit_string (0);
3586 p
->encoding_carryover
= make_number (0);
3588 p
->inherit_coding_system_flag
3589 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3595 #endif /* HAVE_SOCKETS */
3598 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3601 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3602 doc
: /* Return an alist of all network interfaces and their network address.
3603 Each element is a cons, the car of which is a string containing the
3604 interface name, and the cdr is the network address in internal
3605 format; see the description of ADDRESS in `make-network-process'. */)
3608 struct ifconf ifconf
;
3609 struct ifreq
*ifreqs
= NULL
;
3614 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3620 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3621 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3628 ifconf
.ifc_len
= buf_size
;
3629 ifconf
.ifc_req
= ifreqs
;
3630 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3636 if (ifconf
.ifc_len
== buf_size
)
3640 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3643 while (--ifaces
>= 0)
3645 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3646 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3647 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3649 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3650 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3651 res
= Fcons (Fcons (build_string (namebuf
),
3652 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3653 sizeof (struct sockaddr
))),
3659 #endif /* SIOCGIFCONF */
3661 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3668 static struct ifflag_def ifflag_table
[] = {
3672 #ifdef IFF_BROADCAST
3673 { IFF_BROADCAST
, "broadcast" },
3676 { IFF_DEBUG
, "debug" },
3679 { IFF_LOOPBACK
, "loopback" },
3681 #ifdef IFF_POINTOPOINT
3682 { IFF_POINTOPOINT
, "pointopoint" },
3685 { IFF_RUNNING
, "running" },
3688 { IFF_NOARP
, "noarp" },
3691 { IFF_PROMISC
, "promisc" },
3693 #ifdef IFF_NOTRAILERS
3694 { IFF_NOTRAILERS
, "notrailers" },
3697 { IFF_ALLMULTI
, "allmulti" },
3700 { IFF_MASTER
, "master" },
3703 { IFF_SLAVE
, "slave" },
3705 #ifdef IFF_MULTICAST
3706 { IFF_MULTICAST
, "multicast" },
3709 { IFF_PORTSEL
, "portsel" },
3711 #ifdef IFF_AUTOMEDIA
3712 { IFF_AUTOMEDIA
, "automedia" },
3715 { IFF_DYNAMIC
, "dynamic" },
3718 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3721 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3724 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3727 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3730 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3735 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3736 doc
: /* Return information about network interface named IFNAME.
3737 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3738 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3739 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3740 FLAGS is the current flags of the interface. */)
3745 Lisp_Object res
= Qnil
;
3750 CHECK_STRING (ifname
);
3752 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3753 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3755 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3760 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3761 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3763 int flags
= rq
.ifr_flags
;
3764 struct ifflag_def
*fp
;
3768 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3770 if (flags
& fp
->flag_bit
)
3772 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3773 flags
-= fp
->flag_bit
;
3776 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3778 if (flags
& (1 << fnum
))
3780 elt
= Fcons (make_number (fnum
), elt
);
3785 res
= Fcons (elt
, res
);
3788 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3789 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3791 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3792 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3796 for (n
= 0; n
< 6; n
++)
3797 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3798 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3801 res
= Fcons (elt
, res
);
3804 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3805 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3808 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3809 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3811 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3815 res
= Fcons (elt
, res
);
3818 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3819 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3822 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3825 res
= Fcons (elt
, res
);
3828 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3829 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3832 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3835 res
= Fcons (elt
, res
);
3839 return any
? res
: Qnil
;
3842 #endif /* HAVE_SOCKETS */
3844 /* Turn off input and output for process PROC. */
3847 deactivate_process (proc
)
3850 register int inchannel
, outchannel
;
3851 register struct Lisp_Process
*p
= XPROCESS (proc
);
3853 inchannel
= XINT (p
->infd
);
3854 outchannel
= XINT (p
->outfd
);
3856 #ifdef ADAPTIVE_READ_BUFFERING
3857 if (XINT (p
->read_output_delay
) > 0)
3859 if (--process_output_delay_count
< 0)
3860 process_output_delay_count
= 0;
3861 XSETINT (p
->read_output_delay
, 0);
3862 p
->read_output_skip
= Qnil
;
3868 /* Beware SIGCHLD hereabouts. */
3869 flush_pending_output (inchannel
);
3872 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3873 sys$
dassgn (outchannel
);
3874 vs
= get_vms_process_pointer (p
->pid
);
3876 give_back_vms_process_stuff (vs
);
3879 emacs_close (inchannel
);
3880 if (outchannel
>= 0 && outchannel
!= inchannel
)
3881 emacs_close (outchannel
);
3884 XSETINT (p
->infd
, -1);
3885 XSETINT (p
->outfd
, -1);
3886 #ifdef DATAGRAM_SOCKETS
3887 if (DATAGRAM_CHAN_P (inchannel
))
3889 xfree (datagram_address
[inchannel
].sa
);
3890 datagram_address
[inchannel
].sa
= 0;
3891 datagram_address
[inchannel
].len
= 0;
3894 chan_process
[inchannel
] = Qnil
;
3895 FD_CLR (inchannel
, &input_wait_mask
);
3896 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3897 #ifdef NON_BLOCKING_CONNECT
3898 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3900 FD_CLR (inchannel
, &connect_wait_mask
);
3901 if (--num_pending_connects
< 0)
3905 if (inchannel
== max_process_desc
)
3908 /* We just closed the highest-numbered process input descriptor,
3909 so recompute the highest-numbered one now. */
3910 max_process_desc
= 0;
3911 for (i
= 0; i
< MAXDESC
; i
++)
3912 if (!NILP (chan_process
[i
]))
3913 max_process_desc
= i
;
3918 /* Close all descriptors currently in use for communication
3919 with subprocess. This is used in a newly-forked subprocess
3920 to get rid of irrelevant descriptors. */
3923 close_process_descs ()
3927 for (i
= 0; i
< MAXDESC
; i
++)
3929 Lisp_Object process
;
3930 process
= chan_process
[i
];
3931 if (!NILP (process
))
3933 int in
= XINT (XPROCESS (process
)->infd
);
3934 int out
= XINT (XPROCESS (process
)->outfd
);
3937 if (out
>= 0 && in
!= out
)
3944 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3946 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3947 It is read into the process' buffers or given to their filter functions.
3948 Non-nil arg PROCESS means do not return until some output has been received
3951 Non-nil second arg SECONDS and third arg MILLISEC are number of
3952 seconds and milliseconds to wait; return after that much time whether
3953 or not there is input. If SECONDS is a floating point number,
3954 it specifies a fractional number of seconds to wait.
3956 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3957 from PROCESS, suspending reading output from other processes.
3958 If JUST-THIS-ONE is an integer, don't run any timers either.
3959 Return non-nil if we received any output before the timeout expired. */)
3960 (process
, seconds
, millisec
, just_this_one
)
3961 register Lisp_Object process
, seconds
, millisec
, just_this_one
;
3963 int secs
, usecs
= 0;
3965 if (! NILP (process
))
3966 CHECK_PROCESS (process
);
3968 just_this_one
= Qnil
;
3970 if (!NILP (seconds
))
3972 if (INTEGERP (seconds
))
3973 secs
= XINT (seconds
);
3974 else if (FLOATP (seconds
))
3976 double timeout
= XFLOAT_DATA (seconds
);
3977 secs
= (int) timeout
;
3978 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3981 wrong_type_argument (Qnumberp
, seconds
);
3983 if (INTEGERP (millisec
))
3986 usecs
+= XINT (millisec
) * 1000;
3987 carry
= usecs
/ 1000000;
3989 if ((usecs
-= carry
* 1000000) < 0)
3996 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3997 secs
= -1, usecs
= 0;
4000 secs
= NILP (process
) ? -1 : 0;
4003 (wait_reading_process_output (secs
, usecs
, 0, 0,
4005 !NILP (process
) ? XPROCESS (process
) : NULL
,
4006 NILP (just_this_one
) ? 0 :
4007 !INTEGERP (just_this_one
) ? 1 : -1)
4011 /* Accept a connection for server process SERVER on CHANNEL. */
4013 static int connect_counter
= 0;
4016 server_accept_connection (server
, channel
)
4020 Lisp_Object proc
, caller
, name
, buffer
;
4021 Lisp_Object contact
, host
, service
;
4022 struct Lisp_Process
*ps
= XPROCESS (server
);
4023 struct Lisp_Process
*p
;
4027 struct sockaddr_in in
;
4029 struct sockaddr_in6 in6
;
4031 #ifdef HAVE_LOCAL_SOCKETS
4032 struct sockaddr_un un
;
4035 int len
= sizeof saddr
;
4037 s
= accept (channel
, &saddr
.sa
, &len
);
4046 if (code
== EWOULDBLOCK
)
4050 if (!NILP (ps
->log
))
4051 call3 (ps
->log
, server
, Qnil
,
4052 concat3 (build_string ("accept failed with code"),
4053 Fnumber_to_string (make_number (code
)),
4054 build_string ("\n")));
4060 /* Setup a new process to handle the connection. */
4062 /* Generate a unique identification of the caller, and build contact
4063 information for this process. */
4066 switch (saddr
.sa
.sa_family
)
4070 Lisp_Object args
[5];
4071 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4072 args
[0] = build_string ("%d.%d.%d.%d");
4073 args
[1] = make_number (*ip
++);
4074 args
[2] = make_number (*ip
++);
4075 args
[3] = make_number (*ip
++);
4076 args
[4] = make_number (*ip
++);
4077 host
= Fformat (5, args
);
4078 service
= make_number (ntohs (saddr
.in
.sin_port
));
4080 args
[0] = build_string (" <%s:%d>");
4083 caller
= Fformat (3, args
);
4090 Lisp_Object args
[9];
4091 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4093 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4094 for (i
= 0; i
< 8; i
++)
4095 args
[i
+1] = make_number (ntohs(ip6
[i
]));
4096 host
= Fformat (9, args
);
4097 service
= make_number (ntohs (saddr
.in
.sin_port
));
4099 args
[0] = build_string (" <[%s]:%d>");
4102 caller
= Fformat (3, args
);
4107 #ifdef HAVE_LOCAL_SOCKETS
4111 caller
= Fnumber_to_string (make_number (connect_counter
));
4112 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
4116 /* Create a new buffer name for this process if it doesn't have a
4117 filter. The new buffer name is based on the buffer name or
4118 process name of the server process concatenated with the caller
4121 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4125 buffer
= ps
->buffer
;
4127 buffer
= Fbuffer_name (buffer
);
4132 buffer
= concat2 (buffer
, caller
);
4133 buffer
= Fget_buffer_create (buffer
);
4137 /* Generate a unique name for the new server process. Combine the
4138 server process name with the caller identification. */
4140 name
= concat2 (ps
->name
, caller
);
4141 proc
= make_process (name
);
4143 chan_process
[s
] = proc
;
4146 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4149 fcntl (s
, F_SETFL
, O_NDELAY
);
4153 p
= XPROCESS (proc
);
4155 /* Build new contact information for this setup. */
4156 contact
= Fcopy_sequence (ps
->childp
);
4157 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4158 contact
= Fplist_put (contact
, QChost
, host
);
4159 if (!NILP (service
))
4160 contact
= Fplist_put (contact
, QCservice
, service
);
4161 contact
= Fplist_put (contact
, QCremote
,
4162 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4163 #ifdef HAVE_GETSOCKNAME
4165 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4166 contact
= Fplist_put (contact
, QClocal
,
4167 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4170 p
->childp
= contact
;
4171 p
->plist
= Fcopy_sequence (ps
->plist
);
4174 p
->sentinel
= ps
->sentinel
;
4175 p
->filter
= ps
->filter
;
4178 XSETINT (p
->infd
, s
);
4179 XSETINT (p
->outfd
, s
);
4182 /* Client processes for accepted connections are not stopped initially. */
4183 if (!EQ (p
->filter
, Qt
))
4185 FD_SET (s
, &input_wait_mask
);
4186 FD_SET (s
, &non_keyboard_wait_mask
);
4189 if (s
> max_process_desc
)
4190 max_process_desc
= s
;
4192 /* Setup coding system for new process based on server process.
4193 This seems to be the proper thing to do, as the coding system
4194 of the new process should reflect the settings at the time the
4195 server socket was opened; not the current settings. */
4197 p
->decode_coding_system
= ps
->decode_coding_system
;
4198 p
->encode_coding_system
= ps
->encode_coding_system
;
4199 setup_process_coding_systems (proc
);
4201 p
->decoding_buf
= make_uninit_string (0);
4202 p
->decoding_carryover
= make_number (0);
4203 p
->encoding_buf
= make_uninit_string (0);
4204 p
->encoding_carryover
= make_number (0);
4206 p
->inherit_coding_system_flag
4207 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
4209 if (!NILP (ps
->log
))
4210 call3 (ps
->log
, server
, proc
,
4211 concat3 (build_string ("accept from "),
4212 (STRINGP (host
) ? host
: build_string ("-")),
4213 build_string ("\n")));
4215 if (!NILP (p
->sentinel
))
4216 exec_sentinel (proc
,
4217 concat3 (build_string ("open from "),
4218 (STRINGP (host
) ? host
: build_string ("-")),
4219 build_string ("\n")));
4222 /* This variable is different from waiting_for_input in keyboard.c.
4223 It is used to communicate to a lisp process-filter/sentinel (via the
4224 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4225 for user-input when that process-filter was called.
4226 waiting_for_input cannot be used as that is by definition 0 when
4227 lisp code is being evalled.
4228 This is also used in record_asynch_buffer_change.
4229 For that purpose, this must be 0
4230 when not inside wait_reading_process_output. */
4231 static int waiting_for_user_input_p
;
4234 wait_reading_process_output_unwind (data
)
4237 waiting_for_user_input_p
= XINT (data
);
4241 /* This is here so breakpoints can be put on it. */
4243 wait_reading_process_output_1 ()
4247 /* Use a wrapper around select to work around a bug in gdb 5.3.
4248 Normally, the wrapper is optimzed away by inlining.
4250 If emacs is stopped inside select, the gdb backtrace doesn't
4251 show the function which called select, so it is practically
4252 impossible to step through wait_reading_process_output. */
4256 select_wrapper (n
, rfd
, wfd
, xfd
, tmo
)
4258 SELECT_TYPE
*rfd
, *wfd
, *xfd
;
4261 return select (n
, rfd
, wfd
, xfd
, tmo
);
4263 #define select select_wrapper
4266 /* Read and dispose of subprocess output while waiting for timeout to
4267 elapse and/or keyboard input to be available.
4270 timeout in seconds, or
4271 zero for no limit, or
4272 -1 means gobble data immediately available but don't wait for any.
4275 an additional duration to wait, measured in microseconds.
4276 If this is nonzero and time_limit is 0, then the timeout
4277 consists of MICROSECS only.
4279 READ_KBD is a lisp value:
4280 0 to ignore keyboard input, or
4281 1 to return when input is available, or
4282 -1 meaning caller will actually read the input, so don't throw to
4283 the quit handler, or
4285 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4286 output that arrives.
4288 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4289 (and gobble terminal input into the buffer if any arrives).
4291 If WAIT_PROC is specified, wait until something arrives from that
4292 process. The return value is true if we read some input from
4295 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4296 (suspending output from other processes). A negative value
4297 means don't run any timers either.
4299 If WAIT_PROC is specified, then the function returns true if we
4300 received input from that process before the timeout elapsed.
4301 Otherwise, return true if we received input from any process. */
4304 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4305 wait_for_cell
, wait_proc
, just_wait_proc
)
4306 int time_limit
, microsecs
, read_kbd
, do_display
;
4307 Lisp_Object wait_for_cell
;
4308 struct Lisp_Process
*wait_proc
;
4311 register int channel
, nfds
;
4312 SELECT_TYPE Available
;
4313 #ifdef NON_BLOCKING_CONNECT
4314 SELECT_TYPE Connecting
;
4317 int check_delay
, no_avail
;
4320 EMACS_TIME timeout
, end_time
;
4321 int wait_channel
= -1;
4322 int got_some_input
= 0;
4323 int count
= SPECPDL_INDEX ();
4325 FD_ZERO (&Available
);
4326 #ifdef NON_BLOCKING_CONNECT
4327 FD_ZERO (&Connecting
);
4330 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4331 if (wait_proc
!= NULL
)
4332 wait_channel
= XINT (wait_proc
->infd
);
4334 record_unwind_protect (wait_reading_process_output_unwind
,
4335 make_number (waiting_for_user_input_p
));
4336 waiting_for_user_input_p
= read_kbd
;
4338 /* Since we may need to wait several times,
4339 compute the absolute time to return at. */
4340 if (time_limit
|| microsecs
)
4342 EMACS_GET_TIME (end_time
);
4343 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4344 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4346 #ifdef POLL_INTERRUPTED_SYS_CALL
4347 /* AlainF 5-Jul-1996
4348 HP-UX 10.10 seem to have problems with signals coming in
4349 Causes "poll: interrupted system call" messages when Emacs is run
4351 Turn off periodic alarms (in case they are in use),
4352 and then turn off any other atimers. */
4354 turn_on_atimers (0);
4355 #endif /* POLL_INTERRUPTED_SYS_CALL */
4359 int timeout_reduced_for_timers
= 0;
4361 /* If calling from keyboard input, do not quit
4362 since we want to return C-g as an input character.
4363 Otherwise, do pending quit if requested. */
4367 else if (interrupt_input_pending
)
4368 handle_async_input ();
4371 /* Exit now if the cell we're waiting for became non-nil. */
4372 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4375 /* Compute time from now till when time limit is up */
4376 /* Exit if already run out */
4377 if (time_limit
== -1)
4379 /* -1 specified for timeout means
4380 gobble output available now
4381 but don't wait at all. */
4383 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4385 else if (time_limit
|| microsecs
)
4387 EMACS_GET_TIME (timeout
);
4388 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4389 if (EMACS_TIME_NEG_P (timeout
))
4394 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4397 /* Normally we run timers here.
4398 But not if wait_for_cell; in those cases,
4399 the wait is supposed to be short,
4400 and those callers cannot handle running arbitrary Lisp code here. */
4401 if (NILP (wait_for_cell
)
4402 && just_wait_proc
>= 0)
4404 EMACS_TIME timer_delay
;
4408 int old_timers_run
= timers_run
;
4409 struct buffer
*old_buffer
= current_buffer
;
4410 Lisp_Object old_window
= selected_window
;
4412 timer_delay
= timer_check (1);
4414 /* If a timer has run, this might have changed buffers
4415 an alike. Make read_key_sequence aware of that. */
4416 if (timers_run
!= old_timers_run
4417 && (old_buffer
!= current_buffer
4418 || !EQ (old_window
, selected_window
))
4419 && waiting_for_user_input_p
== -1)
4420 record_asynch_buffer_change ();
4422 if (timers_run
!= old_timers_run
&& do_display
)
4423 /* We must retry, since a timer may have requeued itself
4424 and that could alter the time_delay. */
4425 redisplay_preserve_echo_area (9);
4429 while (!detect_input_pending ());
4431 /* If there is unread keyboard input, also return. */
4433 && requeued_events_pending_p ())
4436 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4438 EMACS_TIME difference
;
4439 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4440 if (EMACS_TIME_NEG_P (difference
))
4442 timeout
= timer_delay
;
4443 timeout_reduced_for_timers
= 1;
4446 /* If time_limit is -1, we are not going to wait at all. */
4447 else if (time_limit
!= -1)
4449 /* This is so a breakpoint can be put here. */
4450 wait_reading_process_output_1 ();
4454 /* Cause C-g and alarm signals to take immediate action,
4455 and cause input available signals to zero out timeout.
4457 It is important that we do this before checking for process
4458 activity. If we get a SIGCHLD after the explicit checks for
4459 process activity, timeout is the only way we will know. */
4461 set_waiting_for_input (&timeout
);
4463 /* If status of something has changed, and no input is
4464 available, notify the user of the change right away. After
4465 this explicit check, we'll let the SIGCHLD handler zap
4466 timeout to get our attention. */
4467 if (update_tick
!= process_tick
&& do_display
)
4470 #ifdef NON_BLOCKING_CONNECT
4474 Atemp
= input_wait_mask
;
4475 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4477 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4478 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
4480 #ifdef NON_BLOCKING_CONNECT
4481 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4485 (SELECT_TYPE
*)0, &timeout
)
4488 /* It's okay for us to do this and then continue with
4489 the loop, since timeout has already been zeroed out. */
4490 clear_waiting_for_input ();
4491 status_notify (NULL
);
4495 /* Don't wait for output from a non-running process. Just
4496 read whatever data has already been received. */
4497 if (wait_proc
&& wait_proc
->raw_status_new
)
4498 update_status (wait_proc
);
4500 && ! EQ (wait_proc
->status
, Qrun
)
4501 && ! EQ (wait_proc
->status
, Qconnect
))
4503 int nread
, total_nread
= 0;
4505 clear_waiting_for_input ();
4506 XSETPROCESS (proc
, wait_proc
);
4508 /* Read data from the process, until we exhaust it. */
4509 while (XINT (wait_proc
->infd
) >= 0)
4511 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
4517 total_nread
+= nread
;
4519 else if (nread
== -1 && EIO
== errno
)
4523 else if (nread
== -1 && EAGAIN
== errno
)
4527 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4531 if (total_nread
> 0 && do_display
)
4532 redisplay_preserve_echo_area (10);
4537 /* Wait till there is something to do */
4539 if (wait_proc
&& just_wait_proc
)
4541 if (XINT (wait_proc
->infd
) < 0) /* Terminated */
4543 FD_SET (XINT (wait_proc
->infd
), &Available
);
4545 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4547 else if (!NILP (wait_for_cell
))
4549 Available
= non_process_wait_mask
;
4551 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4556 Available
= non_keyboard_wait_mask
;
4558 Available
= input_wait_mask
;
4559 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4560 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4563 /* If frame size has changed or the window is newly mapped,
4564 redisplay now, before we start to wait. There is a race
4565 condition here; if a SIGIO arrives between now and the select
4566 and indicates that a frame is trashed, the select may block
4567 displaying a trashed screen. */
4568 if (frame_garbaged
&& do_display
)
4570 clear_waiting_for_input ();
4571 redisplay_preserve_echo_area (11);
4573 set_waiting_for_input (&timeout
);
4577 if (read_kbd
&& detect_input_pending ())
4584 #ifdef NON_BLOCKING_CONNECT
4586 Connecting
= connect_wait_mask
;
4589 #ifdef ADAPTIVE_READ_BUFFERING
4590 /* Set the timeout for adaptive read buffering if any
4591 process has non-nil read_output_skip and non-zero
4592 read_output_delay, and we are not reading output for a
4593 specific wait_channel. It is not executed if
4594 Vprocess_adaptive_read_buffering is nil. */
4595 if (process_output_skip
&& check_delay
> 0)
4597 int usecs
= EMACS_USECS (timeout
);
4598 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4599 usecs
= READ_OUTPUT_DELAY_MAX
;
4600 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4602 proc
= chan_process
[channel
];
4605 /* Find minimum non-zero read_output_delay among the
4606 processes with non-nil read_output_skip. */
4607 if (XINT (XPROCESS (proc
)->read_output_delay
) > 0)
4610 if (NILP (XPROCESS (proc
)->read_output_skip
))
4612 FD_CLR (channel
, &Available
);
4613 XPROCESS (proc
)->read_output_skip
= Qnil
;
4614 if (XINT (XPROCESS (proc
)->read_output_delay
) < usecs
)
4615 usecs
= XINT (XPROCESS (proc
)->read_output_delay
);
4618 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4619 process_output_skip
= 0;
4623 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
4625 #ifdef NON_BLOCKING_CONNECT
4626 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4630 (SELECT_TYPE
*)0, &timeout
);
4635 /* Make C-g and alarm signals set flags again */
4636 clear_waiting_for_input ();
4638 /* If we woke up due to SIGWINCH, actually change size now. */
4639 do_pending_window_change (0);
4641 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4642 /* We wanted the full specified time, so return now. */
4646 if (xerrno
== EINTR
)
4649 /* Ultrix select seems to return ENOMEM when it is
4650 interrupted. Treat it just like EINTR. Bleah. Note
4651 that we want to test for the "ultrix" CPP symbol, not
4652 "__ultrix__"; the latter is only defined under GCC, but
4653 not by DEC's bundled CC. -JimB */
4654 else if (xerrno
== ENOMEM
)
4658 /* This happens for no known reason on ALLIANT.
4659 I am guessing that this is the right response. -- RMS. */
4660 else if (xerrno
== EFAULT
)
4663 else if (xerrno
== EBADF
)
4666 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4667 the child's closure of the pts gives the parent a SIGHUP, and
4668 the ptc file descriptor is automatically closed,
4669 yielding EBADF here or at select() call above.
4670 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4671 in m/ibmrt-aix.h), and here we just ignore the select error.
4672 Cleanup occurs c/o status_notify after SIGCLD. */
4673 no_avail
= 1; /* Cannot depend on values returned */
4679 error ("select error: %s", emacs_strerror (xerrno
));
4684 FD_ZERO (&Available
);
4685 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4688 #if defined(sun) && !defined(USG5_4)
4689 if (nfds
> 0 && keyboard_bit_set (&Available
)
4691 /* System sometimes fails to deliver SIGIO.
4693 David J. Mackenzie says that Emacs doesn't compile under
4694 Solaris if this code is enabled, thus the USG5_4 in the CPP
4695 conditional. "I haven't noticed any ill effects so far.
4696 If you find a Solaris expert somewhere, they might know
4698 kill (getpid (), SIGIO
);
4701 #if 0 /* When polling is used, interrupt_input is 0,
4702 so get_input_pending should read the input.
4703 So this should not be needed. */
4704 /* If we are using polling for input,
4705 and we see input available, make it get read now.
4706 Otherwise it might not actually get read for a second.
4707 And on hpux, since we turn off polling in wait_reading_process_output,
4708 it might never get read at all if we don't spend much time
4709 outside of wait_reading_process_output. */
4710 if (read_kbd
&& interrupt_input
4711 && keyboard_bit_set (&Available
)
4712 && input_polling_used ())
4713 kill (getpid (), SIGALRM
);
4716 /* Check for keyboard input */
4717 /* If there is any, return immediately
4718 to give it higher priority than subprocesses */
4722 int old_timers_run
= timers_run
;
4723 struct buffer
*old_buffer
= current_buffer
;
4724 Lisp_Object old_window
= selected_window
;
4727 if (detect_input_pending_run_timers (do_display
))
4729 swallow_events (do_display
);
4730 if (detect_input_pending_run_timers (do_display
))
4734 /* If a timer has run, this might have changed buffers
4735 an alike. Make read_key_sequence aware of that. */
4736 if (timers_run
!= old_timers_run
4737 && waiting_for_user_input_p
== -1
4738 && (old_buffer
!= current_buffer
4739 || !EQ (old_window
, selected_window
)))
4740 record_asynch_buffer_change ();
4746 /* If there is unread keyboard input, also return. */
4748 && requeued_events_pending_p ())
4751 /* If we are not checking for keyboard input now,
4752 do process events (but don't run any timers).
4753 This is so that X events will be processed.
4754 Otherwise they may have to wait until polling takes place.
4755 That would causes delays in pasting selections, for example.
4757 (We used to do this only if wait_for_cell.) */
4758 if (read_kbd
== 0 && detect_input_pending ())
4760 swallow_events (do_display
);
4761 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4762 if (detect_input_pending ())
4767 /* Exit now if the cell we're waiting for became non-nil. */
4768 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4772 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4773 go read it. This can happen with X on BSD after logging out.
4774 In that case, there really is no input and no SIGIO,
4775 but select says there is input. */
4777 if (read_kbd
&& interrupt_input
4778 && keyboard_bit_set (&Available
) && ! noninteractive
)
4779 kill (getpid (), SIGIO
);
4783 got_some_input
|= nfds
> 0;
4785 /* If checking input just got us a size-change event from X,
4786 obey it now if we should. */
4787 if (read_kbd
|| ! NILP (wait_for_cell
))
4788 do_pending_window_change (0);
4790 /* Check for data from a process. */
4791 if (no_avail
|| nfds
== 0)
4794 /* Really FIRST_PROC_DESC should be 0 on Unix,
4795 but this is safer in the short run. */
4796 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4798 if (FD_ISSET (channel
, &Available
)
4799 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4803 /* If waiting for this channel, arrange to return as
4804 soon as no more input to be processed. No more
4806 if (wait_channel
== channel
)
4812 proc
= chan_process
[channel
];
4816 /* If this is a server stream socket, accept connection. */
4817 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4819 server_accept_connection (proc
, channel
);
4823 /* Read data from the process, starting with our
4824 buffered-ahead character if we have one. */
4826 nread
= read_process_output (proc
, channel
);
4829 /* Since read_process_output can run a filter,
4830 which can call accept-process-output,
4831 don't try to read from any other processes
4832 before doing the select again. */
4833 FD_ZERO (&Available
);
4836 redisplay_preserve_echo_area (12);
4839 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4842 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4843 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4845 else if (nread
== -1 && errno
== EAGAIN
)
4849 else if (nread
== -1 && errno
== EAGAIN
)
4851 /* Note that we cannot distinguish between no input
4852 available now and a closed pipe.
4853 With luck, a closed pipe will be accompanied by
4854 subprocess termination and SIGCHLD. */
4855 else if (nread
== 0 && !NETCONN_P (proc
))
4857 #endif /* O_NDELAY */
4858 #endif /* O_NONBLOCK */
4860 /* On some OSs with ptys, when the process on one end of
4861 a pty exits, the other end gets an error reading with
4862 errno = EIO instead of getting an EOF (0 bytes read).
4863 Therefore, if we get an error reading and errno =
4864 EIO, just continue, because the child process has
4865 exited and should clean itself up soon (e.g. when we
4868 However, it has been known to happen that the SIGCHLD
4869 got lost. So raise the signal again just in case.
4871 else if (nread
== -1 && errno
== EIO
)
4873 /* Clear the descriptor now, so we only raise the signal once. */
4874 FD_CLR (channel
, &input_wait_mask
);
4875 FD_CLR (channel
, &non_keyboard_wait_mask
);
4877 kill (getpid (), SIGCHLD
);
4879 #endif /* HAVE_PTYS */
4880 /* If we can detect process termination, don't consider the process
4881 gone just because its pipe is closed. */
4883 else if (nread
== 0 && !NETCONN_P (proc
))
4888 /* Preserve status of processes already terminated. */
4889 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4890 deactivate_process (proc
);
4891 if (XPROCESS (proc
)->raw_status_new
)
4892 update_status (XPROCESS (proc
));
4893 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4894 XPROCESS (proc
)->status
4895 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4898 #ifdef NON_BLOCKING_CONNECT
4899 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4900 && FD_ISSET (channel
, &connect_wait_mask
))
4902 struct Lisp_Process
*p
;
4904 FD_CLR (channel
, &connect_wait_mask
);
4905 if (--num_pending_connects
< 0)
4908 proc
= chan_process
[channel
];
4912 p
= XPROCESS (proc
);
4915 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4916 So only use it on systems where it is known to work. */
4918 int xlen
= sizeof(xerrno
);
4919 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4924 struct sockaddr pname
;
4925 int pnamelen
= sizeof(pname
);
4927 /* If connection failed, getpeername will fail. */
4929 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4931 /* Obtain connect failure code through error slippage. */
4934 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4941 XSETINT (p
->tick
, ++process_tick
);
4942 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4943 deactivate_process (proc
);
4948 /* Execute the sentinel here. If we had relied on
4949 status_notify to do it later, it will read input
4950 from the process before calling the sentinel. */
4951 exec_sentinel (proc
, build_string ("open\n"));
4952 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4954 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4955 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4959 #endif /* NON_BLOCKING_CONNECT */
4960 } /* end for each file descriptor */
4961 } /* end while exit conditions not met */
4963 unbind_to (count
, Qnil
);
4965 /* If calling from keyboard input, do not quit
4966 since we want to return C-g as an input character.
4967 Otherwise, do pending quit if requested. */
4970 /* Prevent input_pending from remaining set if we quit. */
4971 clear_input_pending ();
4974 #ifdef POLL_INTERRUPTED_SYS_CALL
4975 /* AlainF 5-Jul-1996
4976 HP-UX 10.10 seems to have problems with signals coming in
4977 Causes "poll: interrupted system call" messages when Emacs is run
4979 Turn periodic alarms back on */
4981 #endif /* POLL_INTERRUPTED_SYS_CALL */
4983 return got_some_input
;
4986 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4989 read_process_output_call (fun_and_args
)
4990 Lisp_Object fun_and_args
;
4992 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4996 read_process_output_error_handler (error
)
4999 cmd_error_internal (error
, "error in process filter: ");
5001 update_echo_area ();
5002 Fsleep_for (make_number (2), Qnil
);
5006 /* Read pending output from the process channel,
5007 starting with our buffered-ahead character if we have one.
5008 Yield number of decoded characters read.
5010 This function reads at most 4096 characters.
5011 If you want to read all available subprocess output,
5012 you must call it repeatedly until it returns zero.
5014 The characters read are decoded according to PROC's coding-system
5018 read_process_output (proc
, channel
)
5020 register int channel
;
5022 register int nbytes
;
5024 register Lisp_Object outstream
;
5025 register struct buffer
*old
= current_buffer
;
5026 register struct Lisp_Process
*p
= XPROCESS (proc
);
5027 register int opoint
;
5028 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5029 int carryover
= XINT (p
->decoding_carryover
);
5033 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5035 vs
= get_vms_process_pointer (p
->pid
);
5039 return (0); /* Really weird if it does this */
5040 if (!(vs
->iosb
[0] & 1))
5041 return -1; /* I/O error */
5044 error ("Could not get VMS process pointer");
5045 chars
= vs
->inputBuffer
;
5046 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
5049 start_vms_process_read (vs
); /* Crank up the next read on the process */
5050 return 1; /* Nothing worth printing, say we got 1 */
5054 /* The data carried over in the previous decoding (which are at
5055 the tail of decoding buffer) should be prepended to the new
5056 data read to decode all together. */
5057 chars
= (char *) alloca (nbytes
+ carryover
);
5058 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
5059 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
5063 chars
= (char *) alloca (carryover
+ readmax
);
5065 /* See the comment above. */
5066 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
5068 #ifdef DATAGRAM_SOCKETS
5069 /* We have a working select, so proc_buffered_char is always -1. */
5070 if (DATAGRAM_CHAN_P (channel
))
5072 int len
= datagram_address
[channel
].len
;
5073 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5074 0, datagram_address
[channel
].sa
, &len
);
5078 if (proc_buffered_char
[channel
] < 0)
5080 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5081 #ifdef ADAPTIVE_READ_BUFFERING
5082 if (nbytes
> 0 && !NILP (p
->adaptive_read_buffering
))
5084 int delay
= XINT (p
->read_output_delay
);
5087 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5090 process_output_delay_count
++;
5091 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5094 else if (delay
> 0 && (nbytes
== readmax
))
5096 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5098 process_output_delay_count
--;
5100 XSETINT (p
->read_output_delay
, delay
);
5103 p
->read_output_skip
= Qt
;
5104 process_output_skip
= 1;
5111 chars
[carryover
] = proc_buffered_char
[channel
];
5112 proc_buffered_char
[channel
] = -1;
5113 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5117 nbytes
= nbytes
+ 1;
5119 #endif /* not VMS */
5121 XSETINT (p
->decoding_carryover
, 0);
5123 /* At this point, NBYTES holds number of bytes just received
5124 (including the one in proc_buffered_char[channel]). */
5127 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5129 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5132 /* Now set NBYTES how many bytes we must decode. */
5133 nbytes
+= carryover
;
5135 /* Read and dispose of the process output. */
5136 outstream
= p
->filter
;
5137 if (!NILP (outstream
))
5139 /* We inhibit quit here instead of just catching it so that
5140 hitting ^G when a filter happens to be running won't screw
5142 int count
= SPECPDL_INDEX ();
5143 Lisp_Object odeactivate
;
5144 Lisp_Object obuffer
, okeymap
;
5146 int outer_running_asynch_code
= running_asynch_code
;
5147 int waiting
= waiting_for_user_input_p
;
5149 /* No need to gcpro these, because all we do with them later
5150 is test them for EQness, and none of them should be a string. */
5151 odeactivate
= Vdeactivate_mark
;
5152 XSETBUFFER (obuffer
, current_buffer
);
5153 okeymap
= current_buffer
->keymap
;
5155 specbind (Qinhibit_quit
, Qt
);
5156 specbind (Qlast_nonmenu_event
, Qt
);
5158 /* In case we get recursively called,
5159 and we already saved the match data nonrecursively,
5160 save the same match data in safely recursive fashion. */
5161 if (outer_running_asynch_code
)
5164 /* Don't clobber the CURRENT match data, either! */
5165 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5166 restore_search_regs ();
5167 record_unwind_save_match_data ();
5168 Fset_match_data (tem
, Qt
);
5171 /* For speed, if a search happens within this code,
5172 save the match data in a special nonrecursive fashion. */
5173 running_asynch_code
= 1;
5175 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5177 Vlast_coding_system_used
= coding
->symbol
;
5178 /* A new coding system might be found. */
5179 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5181 p
->decode_coding_system
= coding
->symbol
;
5183 /* Don't call setup_coding_system for
5184 proc_decode_coding_system[channel] here. It is done in
5185 detect_coding called via decode_coding above. */
5187 /* If a coding system for encoding is not yet decided, we set
5188 it as the same as coding-system for decoding.
5190 But, before doing that we must check if
5191 proc_encode_coding_system[p->outfd] surely points to a
5192 valid memory because p->outfd will be changed once EOF is
5193 sent to the process. */
5194 if (NILP (p
->encode_coding_system
)
5195 && proc_encode_coding_system
[XINT (p
->outfd
)])
5197 p
->encode_coding_system
= coding
->symbol
;
5198 setup_coding_system (coding
->symbol
,
5199 proc_encode_coding_system
[XINT (p
->outfd
)]);
5200 if (proc_encode_coding_system
[XINT (p
->outfd
)]->eol_type
5201 == CODING_EOL_UNDECIDED
)
5202 proc_encode_coding_system
[XINT (p
->outfd
)]->eol_type
5207 carryover
= nbytes
- coding
->consumed
;
5211 if (SCHARS (p
->decoding_buf
) < carryover
)
5212 p
->decoding_buf
= make_uninit_string (carryover
);
5213 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5215 XSETINT (p
->decoding_carryover
, carryover
);
5216 /* Adjust the multibyteness of TEXT to that of the filter. */
5217 if (NILP (p
->filter_multibyte
) != ! STRING_MULTIBYTE (text
))
5218 text
= (STRING_MULTIBYTE (text
)
5219 ? Fstring_as_unibyte (text
)
5220 : Fstring_to_multibyte (text
));
5221 if (SBYTES (text
) > 0)
5222 internal_condition_case_1 (read_process_output_call
,
5224 Fcons (proc
, Fcons (text
, Qnil
))),
5225 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5226 read_process_output_error_handler
);
5228 /* If we saved the match data nonrecursively, restore it now. */
5229 restore_search_regs ();
5230 running_asynch_code
= outer_running_asynch_code
;
5232 /* Handling the process output should not deactivate the mark. */
5233 Vdeactivate_mark
= odeactivate
;
5235 /* Restore waiting_for_user_input_p as it was
5236 when we were called, in case the filter clobbered it. */
5237 waiting_for_user_input_p
= waiting
;
5239 #if 0 /* Call record_asynch_buffer_change unconditionally,
5240 because we might have changed minor modes or other things
5241 that affect key bindings. */
5242 if (! EQ (Fcurrent_buffer (), obuffer
)
5243 || ! EQ (current_buffer
->keymap
, okeymap
))
5245 /* But do it only if the caller is actually going to read events.
5246 Otherwise there's no need to make him wake up, and it could
5247 cause trouble (for example it would make sit_for return). */
5248 if (waiting_for_user_input_p
== -1)
5249 record_asynch_buffer_change ();
5252 start_vms_process_read (vs
);
5254 unbind_to (count
, Qnil
);
5258 /* If no filter, write into buffer if it isn't dead. */
5259 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
5261 Lisp_Object old_read_only
;
5262 int old_begv
, old_zv
;
5263 int old_begv_byte
, old_zv_byte
;
5264 Lisp_Object odeactivate
;
5265 int before
, before_byte
;
5270 odeactivate
= Vdeactivate_mark
;
5272 Fset_buffer (p
->buffer
);
5274 opoint_byte
= PT_BYTE
;
5275 old_read_only
= current_buffer
->read_only
;
5278 old_begv_byte
= BEGV_BYTE
;
5279 old_zv_byte
= ZV_BYTE
;
5281 current_buffer
->read_only
= Qnil
;
5283 /* Insert new output into buffer
5284 at the current end-of-output marker,
5285 thus preserving logical ordering of input and output. */
5286 if (XMARKER (p
->mark
)->buffer
)
5287 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5288 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5291 SET_PT_BOTH (ZV
, ZV_BYTE
);
5293 before_byte
= PT_BYTE
;
5295 /* If the output marker is outside of the visible region, save
5296 the restriction and widen. */
5297 if (! (BEGV
<= PT
&& PT
<= ZV
))
5300 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5302 Vlast_coding_system_used
= coding
->symbol
;
5303 /* A new coding system might be found. See the comment in the
5304 similar code in the previous `if' block. */
5305 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5307 p
->decode_coding_system
= coding
->symbol
;
5308 if (NILP (p
->encode_coding_system
)
5309 && proc_encode_coding_system
[XINT (p
->outfd
)])
5311 p
->encode_coding_system
= coding
->symbol
;
5312 setup_coding_system (coding
->symbol
,
5313 proc_encode_coding_system
[XINT (p
->outfd
)]);
5314 if (proc_encode_coding_system
[XINT (p
->outfd
)]->eol_type
5315 == CODING_EOL_UNDECIDED
)
5316 proc_encode_coding_system
[XINT (p
->outfd
)]->eol_type
5320 carryover
= nbytes
- coding
->consumed
;
5324 if (SCHARS (p
->decoding_buf
) < carryover
)
5325 p
->decoding_buf
= make_uninit_string (carryover
);
5326 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5328 XSETINT (p
->decoding_carryover
, carryover
);
5330 /* Adjust the multibyteness of TEXT to that of the buffer. */
5331 if (NILP (current_buffer
->enable_multibyte_characters
)
5332 != ! STRING_MULTIBYTE (text
))
5333 text
= (STRING_MULTIBYTE (text
)
5334 ? Fstring_as_unibyte (text
)
5335 : Fstring_to_multibyte (text
));
5336 /* Insert before markers in case we are inserting where
5337 the buffer's mark is, and the user's next command is Meta-y. */
5338 insert_from_string_before_markers (text
, 0, 0,
5339 SCHARS (text
), SBYTES (text
), 0);
5341 /* Make sure the process marker's position is valid when the
5342 process buffer is changed in the signal_after_change above.
5343 W3 is known to do that. */
5344 if (BUFFERP (p
->buffer
)
5345 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5346 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5348 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5350 update_mode_lines
++;
5352 /* Make sure opoint and the old restrictions
5353 float ahead of any new text just as point would. */
5354 if (opoint
>= before
)
5356 opoint
+= PT
- before
;
5357 opoint_byte
+= PT_BYTE
- before_byte
;
5359 if (old_begv
> before
)
5361 old_begv
+= PT
- before
;
5362 old_begv_byte
+= PT_BYTE
- before_byte
;
5364 if (old_zv
>= before
)
5366 old_zv
+= PT
- before
;
5367 old_zv_byte
+= PT_BYTE
- before_byte
;
5370 /* If the restriction isn't what it should be, set it. */
5371 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5372 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5374 /* Handling the process output should not deactivate the mark. */
5375 Vdeactivate_mark
= odeactivate
;
5377 current_buffer
->read_only
= old_read_only
;
5378 SET_PT_BOTH (opoint
, opoint_byte
);
5379 set_buffer_internal (old
);
5382 start_vms_process_read (vs
);
5387 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5389 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5390 This is intended for use by asynchronous process output filters and sentinels. */)
5393 return (waiting_for_user_input_p
? Qt
: Qnil
);
5396 /* Sending data to subprocess */
5398 jmp_buf send_process_frame
;
5399 Lisp_Object process_sent_to
;
5402 send_process_trap ()
5404 SIGNAL_THREAD_CHECK (SIGPIPE
);
5409 sigunblock (sigmask (SIGPIPE
));
5410 longjmp (send_process_frame
, 1);
5413 /* Send some data to process PROC.
5414 BUF is the beginning of the data; LEN is the number of characters.
5415 OBJECT is the Lisp object that the data comes from. If OBJECT is
5416 nil or t, it means that the data comes from C string.
5418 If OBJECT is not nil, the data is encoded by PROC's coding-system
5419 for encoding before it is sent.
5421 This function can evaluate Lisp code and can garbage collect. */
5424 send_process (proc
, buf
, len
, object
)
5425 volatile Lisp_Object proc
;
5426 unsigned char *volatile buf
;
5428 volatile Lisp_Object object
;
5430 /* Use volatile to protect variables from being clobbered by longjmp. */
5431 struct Lisp_Process
*p
= XPROCESS (proc
);
5433 struct coding_system
*coding
;
5434 struct gcpro gcpro1
;
5435 SIGTYPE (*volatile old_sigpipe
) ();
5440 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5443 if (p
->raw_status_new
)
5445 if (! EQ (p
->status
, Qrun
))
5446 error ("Process %s not running", SDATA (p
->name
));
5447 if (XINT (p
->outfd
) < 0)
5448 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5450 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5451 Vlast_coding_system_used
= coding
->symbol
;
5453 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5454 || (BUFFERP (object
)
5455 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5458 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5459 /* The coding system for encoding was changed to raw-text
5460 because we sent a unibyte text previously. Now we are
5461 sending a multibyte text, thus we must encode it by the
5462 original coding system specified for the current process. */
5463 setup_coding_system (p
->encode_coding_system
, coding
);
5464 if (coding
->eol_type
== CODING_EOL_UNDECIDED
)
5465 coding
->eol_type
= system_eol_type
;
5466 /* src_multibyte should be set to 1 _after_ a call to
5467 setup_coding_system, since it resets src_multibyte to
5469 coding
->src_multibyte
= 1;
5473 /* For sending a unibyte text, character code conversion should
5474 not take place but EOL conversion should. So, setup raw-text
5475 or one of the subsidiary if we have not yet done it. */
5476 if (coding
->type
!= coding_type_raw_text
)
5478 if (CODING_REQUIRE_FLUSHING (coding
))
5480 /* But, before changing the coding, we must flush out data. */
5481 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5482 send_process (proc
, "", 0, Qt
);
5484 coding
->src_multibyte
= 0;
5485 setup_raw_text_coding_system (coding
);
5488 coding
->dst_multibyte
= 0;
5490 if (CODING_REQUIRE_ENCODING (coding
))
5492 int require
= encoding_buffer_size (coding
, len
);
5493 int from_byte
= -1, from
= -1, to
= -1;
5495 if (BUFFERP (object
))
5497 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5498 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5499 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5501 else if (STRINGP (object
))
5503 from_byte
= buf
- SDATA (object
);
5504 from
= string_byte_to_char (object
, from_byte
);
5505 to
= string_byte_to_char (object
, from_byte
+ len
);
5508 if (coding
->composing
!= COMPOSITION_DISABLED
)
5511 coding_save_composition (coding
, from
, to
, object
);
5513 coding
->composing
= COMPOSITION_DISABLED
;
5516 if (SBYTES (p
->encoding_buf
) < require
)
5517 p
->encoding_buf
= make_uninit_string (require
);
5520 buf
= (BUFFERP (object
)
5521 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5522 : SDATA (object
) + from_byte
);
5524 object
= p
->encoding_buf
;
5525 encode_coding (coding
, (char *) buf
, SDATA (object
),
5526 len
, SBYTES (object
));
5527 coding_free_composition_data (coding
);
5528 len
= coding
->produced
;
5529 buf
= SDATA (object
);
5533 vs
= get_vms_process_pointer (p
->pid
);
5535 error ("Could not find this process: %x", p
->pid
);
5536 else if (write_to_vms_process (vs
, buf
, len
))
5540 if (pty_max_bytes
== 0)
5542 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5543 pty_max_bytes
= fpathconf (XFASTINT (p
->outfd
), _PC_MAX_CANON
);
5544 if (pty_max_bytes
< 0)
5545 pty_max_bytes
= 250;
5547 pty_max_bytes
= 250;
5549 /* Deduct one, to leave space for the eof. */
5553 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5554 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5555 when returning with longjmp despite being declared volatile. */
5556 if (!setjmp (send_process_frame
))
5558 process_sent_to
= proc
;
5563 /* Decide how much data we can send in one batch.
5564 Long lines need to be split into multiple batches. */
5565 if (!NILP (p
->pty_flag
))
5567 /* Starting this at zero is always correct when not the first
5568 iteration because the previous iteration ended by sending C-d.
5569 It may not be correct for the first iteration
5570 if a partial line was sent in a separate send_process call.
5571 If that proves worth handling, we need to save linepos
5572 in the process object. */
5574 unsigned char *ptr
= (unsigned char *) buf
;
5575 unsigned char *end
= (unsigned char *) buf
+ len
;
5577 /* Scan through this text for a line that is too long. */
5578 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5586 /* If we found one, break the line there
5587 and put in a C-d to force the buffer through. */
5591 /* Send this batch, using one or more write calls. */
5594 int outfd
= XINT (p
->outfd
);
5595 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5596 #ifdef DATAGRAM_SOCKETS
5597 if (DATAGRAM_CHAN_P (outfd
))
5599 rv
= sendto (outfd
, (char *) buf
, this,
5600 0, datagram_address
[outfd
].sa
,
5601 datagram_address
[outfd
].len
);
5602 if (rv
< 0 && errno
== EMSGSIZE
)
5604 signal (SIGPIPE
, old_sigpipe
);
5605 report_file_error ("sending datagram",
5606 Fcons (proc
, Qnil
));
5612 rv
= emacs_write (outfd
, (char *) buf
, this);
5613 #ifdef ADAPTIVE_READ_BUFFERING
5614 if (XINT (p
->read_output_delay
) > 0
5615 && EQ (p
->adaptive_read_buffering
, Qt
))
5617 XSETFASTINT (p
->read_output_delay
, 0);
5618 process_output_delay_count
--;
5619 p
->read_output_skip
= Qnil
;
5623 signal (SIGPIPE
, old_sigpipe
);
5629 || errno
== EWOULDBLOCK
5635 /* Buffer is full. Wait, accepting input;
5636 that may allow the program
5637 to finish doing output and read more. */
5641 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5642 /* A gross hack to work around a bug in FreeBSD.
5643 In the following sequence, read(2) returns
5647 write(2) 954 bytes, get EAGAIN
5648 read(2) 1024 bytes in process_read_output
5649 read(2) 11 bytes in process_read_output
5651 That is, read(2) returns more bytes than have
5652 ever been written successfully. The 1033 bytes
5653 read are the 1022 bytes written successfully
5654 after processing (for example with CRs added if
5655 the terminal is set up that way which it is
5656 here). The same bytes will be seen again in a
5657 later read(2), without the CRs. */
5659 if (errno
== EAGAIN
)
5662 ioctl (XINT (p
->outfd
), TIOCFLUSH
, &flags
);
5664 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5666 /* Running filters might relocate buffers or strings.
5667 Arrange to relocate BUF. */
5668 if (BUFFERP (object
))
5669 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5670 else if (STRINGP (object
))
5671 offset
= buf
- SDATA (object
);
5673 #ifdef EMACS_HAS_USECS
5674 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5676 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5679 if (BUFFERP (object
))
5680 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5681 else if (STRINGP (object
))
5682 buf
= offset
+ SDATA (object
);
5687 /* This is a real error. */
5688 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5695 /* If we sent just part of the string, put in an EOF
5696 to force it through, before we send the rest. */
5698 Fprocess_send_eof (proc
);
5701 #endif /* not VMS */
5704 signal (SIGPIPE
, old_sigpipe
);
5706 proc
= process_sent_to
;
5707 p
= XPROCESS (proc
);
5709 p
->raw_status_new
= 0;
5710 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5711 XSETINT (p
->tick
, ++process_tick
);
5712 deactivate_process (proc
);
5714 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5716 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5724 send_process_object_unwind (buf
)
5729 if (XBUFFER (buf
) == current_buffer
)
5731 tembuf
= Fcurrent_buffer ();
5733 Fkill_buffer (tembuf
);
5737 /* Send current contents of region between START and END to PROC.
5738 If START is a string, send it instead.
5739 This function can evaluate Lisp code and can garbage collect. */
5742 send_process_object (proc
, start
, end
)
5743 Lisp_Object proc
, start
, end
;
5745 int count
= SPECPDL_INDEX ();
5746 Lisp_Object object
= STRINGP (start
) ? start
: Fcurrent_buffer ();
5747 struct buffer
*given_buffer
= current_buffer
;
5751 record_unwind_protect (send_process_object_unwind
, Fcurrent_buffer ());
5753 if (STRINGP (object
) ? STRING_MULTIBYTE (object
)
5754 : ! NILP (XBUFFER (object
)->enable_multibyte_characters
))
5756 struct Lisp_Process
*p
= XPROCESS (proc
);
5757 struct coding_system
*coding
;
5759 if (p
->raw_status_new
)
5761 if (! EQ (p
->status
, Qrun
))
5762 error ("Process %s not running", SDATA (p
->name
));
5763 if (XINT (p
->outfd
) < 0)
5764 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5766 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5767 if (! EQ (coding
->symbol
, p
->encode_coding_system
))
5768 /* The coding system for encoding was changed to raw-text
5769 because we sent a unibyte text previously. Now we are
5770 sending a multibyte text, thus we must encode it by the
5771 original coding system specified for the current process. */
5772 setup_coding_system (p
->encode_coding_system
, coding
);
5773 if (! NILP (coding
->pre_write_conversion
))
5775 struct gcpro gcpro1
, gcpro2
;
5777 GCPRO2 (proc
, object
);
5778 call2 (coding
->pre_write_conversion
, start
, end
);
5780 if (given_buffer
!= current_buffer
)
5782 start
= make_number (BEGV
), end
= make_number (ZV
);
5783 object
= Fcurrent_buffer ();
5788 if (BUFFERP (object
))
5790 EMACS_INT start_byte
;
5792 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5793 move_gap (XINT (end
));
5794 start_byte
= CHAR_TO_BYTE (XINT (start
));
5795 buf
= BYTE_POS_ADDR (start_byte
);
5796 len
= CHAR_TO_BYTE (XINT (end
)) - start_byte
;
5800 buf
= SDATA (object
);
5801 len
= SBYTES (object
);
5803 send_process (proc
, buf
, len
, object
);
5805 unbind_to (count
, Qnil
);
5808 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5810 doc
: /* Send current contents of region as input to PROCESS.
5811 PROCESS may be a process, a buffer, the name of a process or buffer, or
5812 nil, indicating the current buffer's process.
5813 Called from program, takes three arguments, PROCESS, START and END.
5814 If the region is more than 500 characters long,
5815 it is sent in several bunches. This may happen even for shorter regions.
5816 Output from processes can arrive in between bunches. */)
5817 (process
, start
, end
)
5818 Lisp_Object process
, start
, end
;
5822 proc
= get_process (process
);
5823 validate_region (&start
, &end
);
5824 send_process_object (proc
, start
, end
);
5828 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5830 doc
: /* Send PROCESS the contents of STRING as input.
5831 PROCESS may be a process, a buffer, the name of a process or buffer, or
5832 nil, indicating the current buffer's process.
5833 If STRING is more than 500 characters long,
5834 it is sent in several bunches. This may happen even for shorter strings.
5835 Output from processes can arrive in between bunches. */)
5837 Lisp_Object process
, string
;
5840 CHECK_STRING (string
);
5841 proc
= get_process (process
);
5842 send_process_object (proc
, string
, Qnil
);
5846 /* Return the foreground process group for the tty/pty that
5847 the process P uses. */
5849 emacs_get_tty_pgrp (p
)
5850 struct Lisp_Process
*p
;
5855 if (ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5858 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5859 master side. Try the slave side. */
5860 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5864 ioctl (fd
, TIOCGPGRP
, &gid
);
5868 #endif /* defined (TIOCGPGRP ) */
5873 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5874 Sprocess_running_child_p
, 0, 1, 0,
5875 doc
: /* Return t if PROCESS has given the terminal to a child.
5876 If the operating system does not make it possible to find out,
5877 return t unconditionally. */)
5879 Lisp_Object process
;
5881 /* Initialize in case ioctl doesn't exist or gives an error,
5882 in a way that will cause returning t. */
5885 struct Lisp_Process
*p
;
5887 proc
= get_process (process
);
5888 p
= XPROCESS (proc
);
5890 if (!EQ (p
->childp
, Qt
))
5891 error ("Process %s is not a subprocess",
5893 if (XINT (p
->infd
) < 0)
5894 error ("Process %s is not active",
5897 gid
= emacs_get_tty_pgrp (p
);
5904 /* send a signal number SIGNO to PROCESS.
5905 If CURRENT_GROUP is t, that means send to the process group
5906 that currently owns the terminal being used to communicate with PROCESS.
5907 This is used for various commands in shell mode.
5908 If CURRENT_GROUP is lambda, that means send to the process group
5909 that currently owns the terminal, but only if it is NOT the shell itself.
5911 If NOMSG is zero, insert signal-announcements into process's buffers
5914 If we can, we try to signal PROCESS by sending control characters
5915 down the pty. This allows us to signal inferiors who have changed
5916 their uid, for which killpg would return an EPERM error. */
5919 process_send_signal (process
, signo
, current_group
, nomsg
)
5920 Lisp_Object process
;
5922 Lisp_Object current_group
;
5926 register struct Lisp_Process
*p
;
5930 proc
= get_process (process
);
5931 p
= XPROCESS (proc
);
5933 if (!EQ (p
->childp
, Qt
))
5934 error ("Process %s is not a subprocess",
5936 if (XINT (p
->infd
) < 0)
5937 error ("Process %s is not active",
5940 if (NILP (p
->pty_flag
))
5941 current_group
= Qnil
;
5943 /* If we are using pgrps, get a pgrp number and make it negative. */
5944 if (NILP (current_group
))
5945 /* Send the signal to the shell's process group. */
5949 #ifdef SIGNALS_VIA_CHARACTERS
5950 /* If possible, send signals to the entire pgrp
5951 by sending an input character to it. */
5953 /* TERMIOS is the latest and bestest, and seems most likely to
5954 work. If the system has it, use it. */
5957 cc_t
*sig_char
= NULL
;
5959 tcgetattr (XINT (p
->infd
), &t
);
5964 sig_char
= &t
.c_cc
[VINTR
];
5968 sig_char
= &t
.c_cc
[VQUIT
];
5972 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5973 sig_char
= &t
.c_cc
[VSWTCH
];
5975 sig_char
= &t
.c_cc
[VSUSP
];
5980 if (sig_char
&& *sig_char
!= CDISABLE
)
5982 send_process (proc
, sig_char
, 1, Qnil
);
5985 /* If we can't send the signal with a character,
5986 fall through and send it another way. */
5987 #else /* ! HAVE_TERMIOS */
5989 /* On Berkeley descendants, the following IOCTL's retrieve the
5990 current control characters. */
5991 #if defined (TIOCGLTC) && defined (TIOCGETC)
5999 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
6000 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
6003 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
6004 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
6008 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
6009 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
6011 #endif /* ! defined (SIGTSTP) */
6014 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6016 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
6023 ioctl (XINT (p
->infd
), TCGETA
, &t
);
6024 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
6027 ioctl (XINT (p
->infd
), TCGETA
, &t
);
6028 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
6032 ioctl (XINT (p
->infd
), TCGETA
, &t
);
6033 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
6035 #endif /* ! defined (SIGTSTP) */
6037 #else /* ! defined (TCGETA) */
6038 Your configuration files are messed up
.
6039 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
6040 you'd better be using one of the alternatives above! */
6041 #endif /* ! defined (TCGETA) */
6042 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
6043 /* In this case, the code above should alway returns. */
6045 #endif /* ! defined HAVE_TERMIOS */
6047 /* The code above may fall through if it can't
6048 handle the signal. */
6049 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6052 /* Get the current pgrp using the tty itself, if we have that.
6053 Otherwise, use the pty to get the pgrp.
6054 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6055 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6056 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6057 His patch indicates that if TIOCGPGRP returns an error, then
6058 we should just assume that p->pid is also the process group id. */
6060 gid
= emacs_get_tty_pgrp (p
);
6063 /* If we can't get the information, assume
6064 the shell owns the tty. */
6067 /* It is not clear whether anything really can set GID to -1.
6068 Perhaps on some system one of those ioctls can or could do so.
6069 Or perhaps this is vestigial. */
6072 #else /* ! defined (TIOCGPGRP ) */
6073 /* Can't select pgrps on this system, so we know that
6074 the child itself heads the pgrp. */
6076 #endif /* ! defined (TIOCGPGRP ) */
6078 /* If current_group is lambda, and the shell owns the terminal,
6079 don't send any signal. */
6080 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6088 p
->raw_status_new
= 0;
6090 XSETINT (p
->tick
, ++process_tick
);
6092 status_notify (NULL
);
6094 #endif /* ! defined (SIGCONT) */
6097 send_process (proc
, "\003", 1, Qnil
); /* ^C */
6102 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
6107 sys$
forcex (&(p
->pid
), 0, 1);
6110 flush_pending_output (XINT (p
->infd
));
6114 /* If we don't have process groups, send the signal to the immediate
6115 subprocess. That isn't really right, but it's better than any
6116 obvious alternative. */
6119 kill (p
->pid
, signo
);
6123 /* gid may be a pid, or minus a pgrp's number */
6125 if (!NILP (current_group
))
6127 if (ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
) == -1)
6128 EMACS_KILLPG (gid
, signo
);
6135 #else /* ! defined (TIOCSIGSEND) */
6136 EMACS_KILLPG (gid
, signo
);
6137 #endif /* ! defined (TIOCSIGSEND) */
6140 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6141 doc
: /* Interrupt process PROCESS.
6142 PROCESS may be a process, a buffer, or the name of a process or buffer.
6143 No arg or nil means current buffer's process.
6144 Second arg CURRENT-GROUP non-nil means send signal to
6145 the current process-group of the process's controlling terminal
6146 rather than to the process's own process group.
6147 If the process is a shell, this means interrupt current subjob
6148 rather than the shell.
6150 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6151 don't send the signal. */)
6152 (process
, current_group
)
6153 Lisp_Object process
, current_group
;
6155 process_send_signal (process
, SIGINT
, current_group
, 0);
6159 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6160 doc
: /* Kill process PROCESS. May be process or name of one.
6161 See function `interrupt-process' for more details on usage. */)
6162 (process
, current_group
)
6163 Lisp_Object process
, current_group
;
6165 process_send_signal (process
, SIGKILL
, current_group
, 0);
6169 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6170 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6171 See function `interrupt-process' for more details on usage. */)
6172 (process
, current_group
)
6173 Lisp_Object process
, current_group
;
6175 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6179 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6180 doc
: /* Stop process PROCESS. May be process or name of one.
6181 See function `interrupt-process' for more details on usage.
6182 If PROCESS is a network process, inhibit handling of incoming traffic. */)
6183 (process
, current_group
)
6184 Lisp_Object process
, current_group
;
6187 if (PROCESSP (process
) && NETCONN_P (process
))
6189 struct Lisp_Process
*p
;
6191 p
= XPROCESS (process
);
6192 if (NILP (p
->command
)
6193 && XINT (p
->infd
) >= 0)
6195 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6196 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6203 error ("No SIGTSTP support");
6205 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6210 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6211 doc
: /* Continue process PROCESS. May be process or name of one.
6212 See function `interrupt-process' for more details on usage.
6213 If PROCESS is a network process, resume handling of incoming traffic. */)
6214 (process
, current_group
)
6215 Lisp_Object process
, current_group
;
6218 if (PROCESSP (process
) && NETCONN_P (process
))
6220 struct Lisp_Process
*p
;
6222 p
= XPROCESS (process
);
6223 if (EQ (p
->command
, Qt
)
6224 && XINT (p
->infd
) >= 0
6225 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6227 FD_SET (XINT (p
->infd
), &input_wait_mask
);
6228 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
6235 process_send_signal (process
, SIGCONT
, current_group
, 0);
6237 error ("No SIGCONT support");
6242 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6243 2, 2, "sProcess (name or number): \nnSignal code: ",
6244 doc
: /* Send PROCESS the signal with code SIGCODE.
6245 PROCESS may also be a number specifying the process id of the
6246 process to signal; in this case, the process need not be a child of
6248 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6250 Lisp_Object process
, sigcode
;
6254 if (INTEGERP (process
))
6256 pid
= XINT (process
);
6260 if (FLOATP (process
))
6262 pid
= (pid_t
) XFLOAT_DATA (process
);
6266 if (STRINGP (process
))
6269 if (tem
= Fget_process (process
), NILP (tem
))
6271 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6278 process
= get_process (process
);
6283 CHECK_PROCESS (process
);
6284 pid
= XPROCESS (process
)->pid
;
6286 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6290 #define parse_signal(NAME, VALUE) \
6291 else if (!xstricmp (name, NAME)) \
6292 XSETINT (sigcode, VALUE)
6294 if (INTEGERP (sigcode
))
6298 unsigned char *name
;
6300 CHECK_SYMBOL (sigcode
);
6301 name
= SDATA (SYMBOL_NAME (sigcode
));
6303 if (!strncmp(name
, "SIG", 3) || !strncmp(name
, "sig", 3))
6309 parse_signal ("usr1", SIGUSR1
);
6312 parse_signal ("usr2", SIGUSR2
);
6315 parse_signal ("term", SIGTERM
);
6318 parse_signal ("hup", SIGHUP
);
6321 parse_signal ("int", SIGINT
);
6324 parse_signal ("quit", SIGQUIT
);
6327 parse_signal ("ill", SIGILL
);
6330 parse_signal ("abrt", SIGABRT
);
6333 parse_signal ("emt", SIGEMT
);
6336 parse_signal ("kill", SIGKILL
);
6339 parse_signal ("fpe", SIGFPE
);
6342 parse_signal ("bus", SIGBUS
);
6345 parse_signal ("segv", SIGSEGV
);
6348 parse_signal ("sys", SIGSYS
);
6351 parse_signal ("pipe", SIGPIPE
);
6354 parse_signal ("alrm", SIGALRM
);
6357 parse_signal ("urg", SIGURG
);
6360 parse_signal ("stop", SIGSTOP
);
6363 parse_signal ("tstp", SIGTSTP
);
6366 parse_signal ("cont", SIGCONT
);
6369 parse_signal ("chld", SIGCHLD
);
6372 parse_signal ("ttin", SIGTTIN
);
6375 parse_signal ("ttou", SIGTTOU
);
6378 parse_signal ("io", SIGIO
);
6381 parse_signal ("xcpu", SIGXCPU
);
6384 parse_signal ("xfsz", SIGXFSZ
);
6387 parse_signal ("vtalrm", SIGVTALRM
);
6390 parse_signal ("prof", SIGPROF
);
6393 parse_signal ("winch", SIGWINCH
);
6396 parse_signal ("info", SIGINFO
);
6399 error ("Undefined signal name %s", name
);
6404 return make_number (kill (pid
, XINT (sigcode
)));
6407 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6408 doc
: /* Make PROCESS see end-of-file in its input.
6409 EOF comes after any text already sent to it.
6410 PROCESS may be a process, a buffer, the name of a process or buffer, or
6411 nil, indicating the current buffer's process.
6412 If PROCESS is a network connection, or is a process communicating
6413 through a pipe (as opposed to a pty), then you cannot send any more
6414 text to PROCESS after you call this function. */)
6416 Lisp_Object process
;
6419 struct coding_system
*coding
;
6421 if (DATAGRAM_CONN_P (process
))
6424 proc
= get_process (process
);
6425 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
6427 /* Make sure the process is really alive. */
6428 if (XPROCESS (proc
)->raw_status_new
)
6429 update_status (XPROCESS (proc
));
6430 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6431 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6433 if (CODING_REQUIRE_FLUSHING (coding
))
6435 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6436 send_process (proc
, "", 0, Qnil
);
6440 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6442 if (!NILP (XPROCESS (proc
)->pty_flag
))
6443 send_process (proc
, "\004", 1, Qnil
);
6446 int old_outfd
, new_outfd
;
6448 #ifdef HAVE_SHUTDOWN
6449 /* If this is a network connection, or socketpair is used
6450 for communication with the subprocess, call shutdown to cause EOF.
6451 (In some old system, shutdown to socketpair doesn't work.
6452 Then we just can't win.) */
6453 if (XPROCESS (proc
)->pid
== 0
6454 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
6455 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
6456 /* In case of socketpair, outfd == infd, so don't close it. */
6457 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
6458 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6459 #else /* not HAVE_SHUTDOWN */
6460 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6461 #endif /* not HAVE_SHUTDOWN */
6462 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6465 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
6467 if (!proc_encode_coding_system
[new_outfd
])
6468 proc_encode_coding_system
[new_outfd
]
6469 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6470 bcopy (proc_encode_coding_system
[old_outfd
],
6471 proc_encode_coding_system
[new_outfd
],
6472 sizeof (struct coding_system
));
6473 bzero (proc_encode_coding_system
[old_outfd
],
6474 sizeof (struct coding_system
));
6476 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
6482 /* Kill all processes associated with `buffer'.
6483 If `buffer' is nil, kill all processes */
6486 kill_buffer_processes (buffer
)
6489 Lisp_Object tail
, proc
;
6491 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6493 proc
= XCDR (XCAR (tail
));
6494 if (GC_PROCESSP (proc
)
6495 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6497 if (NETCONN_P (proc
))
6498 Fdelete_process (proc
);
6499 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
6500 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6505 /* On receipt of a signal that a child status has changed, loop asking
6506 about children with changed statuses until the system says there
6509 All we do is change the status; we do not run sentinels or print
6510 notifications. That is saved for the next time keyboard input is
6511 done, in order to avoid timing errors.
6513 ** WARNING: this can be called during garbage collection.
6514 Therefore, it must not be fooled by the presence of mark bits in
6517 ** USG WARNING: Although it is not obvious from the documentation
6518 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6519 signal() before executing at least one wait(), otherwise the
6520 handler will be called again, resulting in an infinite loop. The
6521 relevant portion of the documentation reads "SIGCLD signals will be
6522 queued and the signal-catching function will be continually
6523 reentered until the queue is empty". Invoking signal() causes the
6524 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6527 ** Malloc WARNING: This should never call malloc either directly or
6528 indirectly; if it does, that is a bug */
6532 sigchld_handler (signo
)
6535 int old_errno
= errno
;
6537 register struct Lisp_Process
*p
;
6538 extern EMACS_TIME
*input_available_clear_time
;
6540 SIGNAL_THREAD_CHECK (signo
);
6544 sigheld
|= sigbit (SIGCHLD
);
6556 #endif /* no WUNTRACED */
6557 /* Keep trying to get a status until we get a definitive result. */
6561 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6563 while (pid
< 0 && errno
== EINTR
);
6567 /* PID == 0 means no processes found, PID == -1 means a real
6568 failure. We have done all our job, so return. */
6570 /* USG systems forget handlers when they are used;
6571 must reestablish each time */
6572 #if defined (USG) && !defined (POSIX_SIGNALS)
6573 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6576 sigheld
&= ~sigbit (SIGCHLD
);
6584 #endif /* no WNOHANG */
6586 /* Find the process that signaled us, and record its status. */
6588 /* The process can have been deleted by Fdelete_process. */
6589 for (tail
= deleted_pid_list
; GC_CONSP (tail
); tail
= XCDR (tail
))
6591 Lisp_Object xpid
= XCAR (tail
);
6592 if ((GC_INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6593 || (GC_FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6595 XSETCAR (tail
, Qnil
);
6596 goto sigchld_end_of_loop
;
6600 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6602 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6604 proc
= XCDR (XCAR (tail
));
6605 p
= XPROCESS (proc
);
6606 if (GC_EQ (p
->childp
, Qt
) && p
->pid
== pid
)
6611 /* Look for an asynchronous process whose pid hasn't been filled
6614 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6616 proc
= XCDR (XCAR (tail
));
6617 p
= XPROCESS (proc
);
6623 /* Change the status of the process that was found. */
6626 union { int i
; WAITTYPE wt
; } u
;
6627 int clear_desc_flag
= 0;
6629 XSETINT (p
->tick
, ++process_tick
);
6631 p
->raw_status
= u
.i
;
6632 p
->raw_status_new
= 1;
6634 /* If process has terminated, stop waiting for its output. */
6635 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6636 && XINT (p
->infd
) >= 0)
6637 clear_desc_flag
= 1;
6639 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6640 if (clear_desc_flag
)
6642 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6643 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6646 /* Tell wait_reading_process_output that it needs to wake up and
6648 if (input_available_clear_time
)
6649 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6652 /* There was no asynchronous process found for that pid: we have
6653 a synchronous process. */
6656 synch_process_alive
= 0;
6658 /* Report the status of the synchronous process. */
6660 synch_process_retcode
= WRETCODE (w
);
6661 else if (WIFSIGNALED (w
))
6662 synch_process_termsig
= WTERMSIG (w
);
6664 /* Tell wait_reading_process_output that it needs to wake up and
6666 if (input_available_clear_time
)
6667 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6670 sigchld_end_of_loop
:
6673 /* On some systems, we must return right away.
6674 If any more processes want to signal us, we will
6676 Otherwise (on systems that have WNOHANG), loop around
6677 to use up all the processes that have something to tell us. */
6678 #if (defined WINDOWSNT \
6679 || (defined USG && !defined GNU_LINUX \
6680 && !(defined HPUX && defined WNOHANG)))
6681 #if defined (USG) && ! defined (POSIX_SIGNALS)
6682 signal (signo
, sigchld_handler
);
6686 #endif /* USG, but not HPUX with WNOHANG */
6689 #endif /* SIGCHLD */
6693 exec_sentinel_unwind (data
)
6696 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6701 exec_sentinel_error_handler (error
)
6704 cmd_error_internal (error
, "error in process sentinel: ");
6706 update_echo_area ();
6707 Fsleep_for (make_number (2), Qnil
);
6712 exec_sentinel (proc
, reason
)
6713 Lisp_Object proc
, reason
;
6715 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6716 register struct Lisp_Process
*p
= XPROCESS (proc
);
6717 int count
= SPECPDL_INDEX ();
6718 int outer_running_asynch_code
= running_asynch_code
;
6719 int waiting
= waiting_for_user_input_p
;
6721 if (inhibit_sentinels
)
6724 /* No need to gcpro these, because all we do with them later
6725 is test them for EQness, and none of them should be a string. */
6726 odeactivate
= Vdeactivate_mark
;
6727 XSETBUFFER (obuffer
, current_buffer
);
6728 okeymap
= current_buffer
->keymap
;
6730 sentinel
= p
->sentinel
;
6731 if (NILP (sentinel
))
6734 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6735 assure that it gets restored no matter how the sentinel exits. */
6737 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6738 /* Inhibit quit so that random quits don't screw up a running filter. */
6739 specbind (Qinhibit_quit
, Qt
);
6740 specbind (Qlast_nonmenu_event
, Qt
);
6742 /* In case we get recursively called,
6743 and we already saved the match data nonrecursively,
6744 save the same match data in safely recursive fashion. */
6745 if (outer_running_asynch_code
)
6748 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6749 restore_search_regs ();
6750 record_unwind_save_match_data ();
6751 Fset_match_data (tem
, Qt
);
6754 /* For speed, if a search happens within this code,
6755 save the match data in a special nonrecursive fashion. */
6756 running_asynch_code
= 1;
6758 internal_condition_case_1 (read_process_output_call
,
6760 Fcons (proc
, Fcons (reason
, Qnil
))),
6761 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6762 exec_sentinel_error_handler
);
6764 /* If we saved the match data nonrecursively, restore it now. */
6765 restore_search_regs ();
6766 running_asynch_code
= outer_running_asynch_code
;
6768 Vdeactivate_mark
= odeactivate
;
6770 /* Restore waiting_for_user_input_p as it was
6771 when we were called, in case the filter clobbered it. */
6772 waiting_for_user_input_p
= waiting
;
6775 if (! EQ (Fcurrent_buffer (), obuffer
)
6776 || ! EQ (current_buffer
->keymap
, okeymap
))
6778 /* But do it only if the caller is actually going to read events.
6779 Otherwise there's no need to make him wake up, and it could
6780 cause trouble (for example it would make sit_for return). */
6781 if (waiting_for_user_input_p
== -1)
6782 record_asynch_buffer_change ();
6784 unbind_to (count
, Qnil
);
6787 /* Report all recent events of a change in process status
6788 (either run the sentinel or output a message).
6789 This is usually done while Emacs is waiting for keyboard input
6790 but can be done at other times. */
6793 status_notify (deleting_process
)
6794 struct Lisp_Process
*deleting_process
;
6796 register Lisp_Object proc
, buffer
;
6797 Lisp_Object tail
, msg
;
6798 struct gcpro gcpro1
, gcpro2
;
6802 /* We need to gcpro tail; if read_process_output calls a filter
6803 which deletes a process and removes the cons to which tail points
6804 from Vprocess_alist, and then causes a GC, tail is an unprotected
6808 /* Set this now, so that if new processes are created by sentinels
6809 that we run, we get called again to handle their status changes. */
6810 update_tick
= process_tick
;
6812 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6815 register struct Lisp_Process
*p
;
6817 proc
= Fcdr (Fcar (tail
));
6818 p
= XPROCESS (proc
);
6820 if (XINT (p
->tick
) != XINT (p
->update_tick
))
6822 XSETINT (p
->update_tick
, XINT (p
->tick
));
6824 /* If process is still active, read any output that remains. */
6825 while (! EQ (p
->filter
, Qt
)
6826 && ! EQ (p
->status
, Qconnect
)
6827 && ! EQ (p
->status
, Qlisten
)
6828 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6829 && XINT (p
->infd
) >= 0
6830 && p
!= deleting_process
6831 && read_process_output (proc
, XINT (p
->infd
)) > 0);
6835 /* Get the text to use for the message. */
6836 if (p
->raw_status_new
)
6838 msg
= status_message (p
);
6840 /* If process is terminated, deactivate it or delete it. */
6842 if (CONSP (p
->status
))
6843 symbol
= XCAR (p
->status
);
6845 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6846 || EQ (symbol
, Qclosed
))
6848 if (delete_exited_processes
)
6849 remove_process (proc
);
6851 deactivate_process (proc
);
6854 /* The actions above may have further incremented p->tick.
6855 So set p->update_tick again
6856 so that an error in the sentinel will not cause
6857 this code to be run again. */
6858 XSETINT (p
->update_tick
, XINT (p
->tick
));
6859 /* Now output the message suitably. */
6860 if (!NILP (p
->sentinel
))
6861 exec_sentinel (proc
, msg
);
6862 /* Don't bother with a message in the buffer
6863 when a process becomes runnable. */
6864 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6866 Lisp_Object ro
, tem
;
6867 struct buffer
*old
= current_buffer
;
6868 int opoint
, opoint_byte
;
6869 int before
, before_byte
;
6871 ro
= XBUFFER (buffer
)->read_only
;
6873 /* Avoid error if buffer is deleted
6874 (probably that's why the process is dead, too) */
6875 if (NILP (XBUFFER (buffer
)->name
))
6877 Fset_buffer (buffer
);
6880 opoint_byte
= PT_BYTE
;
6881 /* Insert new output into buffer
6882 at the current end-of-output marker,
6883 thus preserving logical ordering of input and output. */
6884 if (XMARKER (p
->mark
)->buffer
)
6885 Fgoto_char (p
->mark
);
6887 SET_PT_BOTH (ZV
, ZV_BYTE
);
6890 before_byte
= PT_BYTE
;
6892 tem
= current_buffer
->read_only
;
6893 current_buffer
->read_only
= Qnil
;
6894 insert_string ("\nProcess ");
6895 Finsert (1, &p
->name
);
6896 insert_string (" ");
6898 current_buffer
->read_only
= tem
;
6899 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6901 if (opoint
>= before
)
6902 SET_PT_BOTH (opoint
+ (PT
- before
),
6903 opoint_byte
+ (PT_BYTE
- before_byte
));
6905 SET_PT_BOTH (opoint
, opoint_byte
);
6907 set_buffer_internal (old
);
6912 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6913 redisplay_preserve_echo_area (13);
6919 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6920 Sset_process_coding_system
, 1, 3, 0,
6921 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6922 DECODING will be used to decode subprocess output and ENCODING to
6923 encode subprocess input. */)
6924 (process
, decoding
, encoding
)
6925 register Lisp_Object process
, decoding
, encoding
;
6927 register struct Lisp_Process
*p
;
6929 CHECK_PROCESS (process
);
6930 p
= XPROCESS (process
);
6931 if (XINT (p
->infd
) < 0)
6932 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6933 if (XINT (p
->outfd
) < 0)
6934 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6935 Fcheck_coding_system (decoding
);
6936 Fcheck_coding_system (encoding
);
6938 p
->decode_coding_system
= decoding
;
6939 p
->encode_coding_system
= encoding
;
6940 setup_process_coding_systems (process
);
6945 DEFUN ("process-coding-system",
6946 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6947 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6949 register Lisp_Object process
;
6951 CHECK_PROCESS (process
);
6952 return Fcons (XPROCESS (process
)->decode_coding_system
,
6953 XPROCESS (process
)->encode_coding_system
);
6956 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6957 Sset_process_filter_multibyte
, 2, 2, 0,
6958 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6959 If FLAG is non-nil, the filter is given multibyte strings.
6960 If FLAG is nil, the filter is given unibyte strings. In this case,
6961 all character code conversion except for end-of-line conversion is
6964 Lisp_Object process
, flag
;
6966 register struct Lisp_Process
*p
;
6968 CHECK_PROCESS (process
);
6969 p
= XPROCESS (process
);
6970 p
->filter_multibyte
= flag
;
6971 setup_process_coding_systems (process
);
6976 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6977 Sprocess_filter_multibyte_p
, 1, 1, 0,
6978 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6980 Lisp_Object process
;
6982 register struct Lisp_Process
*p
;
6984 CHECK_PROCESS (process
);
6985 p
= XPROCESS (process
);
6987 return (NILP (p
->filter_multibyte
) ? Qnil
: Qt
);
6992 /* The first time this is called, assume keyboard input comes from DESC
6993 instead of from where we used to expect it.
6994 Subsequent calls mean assume input keyboard can come from DESC
6995 in addition to other places. */
6997 static int add_keyboard_wait_descriptor_called_flag
;
7000 add_keyboard_wait_descriptor (desc
)
7003 if (! add_keyboard_wait_descriptor_called_flag
)
7004 FD_CLR (0, &input_wait_mask
);
7005 add_keyboard_wait_descriptor_called_flag
= 1;
7006 FD_SET (desc
, &input_wait_mask
);
7007 FD_SET (desc
, &non_process_wait_mask
);
7008 if (desc
> max_keyboard_desc
)
7009 max_keyboard_desc
= desc
;
7012 /* From now on, do not expect DESC to give keyboard input. */
7015 delete_keyboard_wait_descriptor (desc
)
7019 int lim
= max_keyboard_desc
;
7021 FD_CLR (desc
, &input_wait_mask
);
7022 FD_CLR (desc
, &non_process_wait_mask
);
7024 if (desc
== max_keyboard_desc
)
7025 for (fd
= 0; fd
< lim
; fd
++)
7026 if (FD_ISSET (fd
, &input_wait_mask
)
7027 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7028 max_keyboard_desc
= fd
;
7031 /* Return nonzero if *MASK has a bit set
7032 that corresponds to one of the keyboard input descriptors. */
7035 keyboard_bit_set (mask
)
7040 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
7041 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7042 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7053 inhibit_sentinels
= 0;
7057 if (! noninteractive
|| initialized
)
7059 signal (SIGCHLD
, sigchld_handler
);
7062 FD_ZERO (&input_wait_mask
);
7063 FD_ZERO (&non_keyboard_wait_mask
);
7064 FD_ZERO (&non_process_wait_mask
);
7065 max_process_desc
= 0;
7067 #ifdef NON_BLOCKING_CONNECT
7068 FD_ZERO (&connect_wait_mask
);
7069 num_pending_connects
= 0;
7072 #ifdef ADAPTIVE_READ_BUFFERING
7073 process_output_delay_count
= 0;
7074 process_output_skip
= 0;
7077 FD_SET (0, &input_wait_mask
);
7079 Vprocess_alist
= Qnil
;
7081 deleted_pid_list
= Qnil
;
7083 for (i
= 0; i
< MAXDESC
; i
++)
7085 chan_process
[i
] = Qnil
;
7086 proc_buffered_char
[i
] = -1;
7088 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
7089 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
7090 #ifdef DATAGRAM_SOCKETS
7091 bzero (datagram_address
, sizeof datagram_address
);
7096 Lisp_Object subfeatures
= Qnil
;
7097 struct socket_options
*sopt
;
7099 #define ADD_SUBFEATURE(key, val) \
7100 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
7102 #ifdef NON_BLOCKING_CONNECT
7103 ADD_SUBFEATURE (QCnowait
, Qt
);
7105 #ifdef DATAGRAM_SOCKETS
7106 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7108 #ifdef HAVE_LOCAL_SOCKETS
7109 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7111 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7113 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7115 #ifdef HAVE_GETSOCKNAME
7116 ADD_SUBFEATURE (QCservice
, Qt
);
7118 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
7119 ADD_SUBFEATURE (QCserver
, Qt
);
7122 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7123 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
7125 Fprovide (intern ("make-network-process"), subfeatures
);
7127 #endif /* HAVE_SOCKETS */
7129 #if defined (DARWIN) || defined (MAC_OSX)
7130 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7131 processes. As such, we only change the default value. */
7134 char *release
= get_operating_system_release();
7135 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7136 && release
[1] == '.')) {
7137 Vprocess_connection_type
= Qnil
;
7146 Qprocessp
= intern ("processp");
7147 staticpro (&Qprocessp
);
7148 Qrun
= intern ("run");
7150 Qstop
= intern ("stop");
7152 Qsignal
= intern ("signal");
7153 staticpro (&Qsignal
);
7155 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7158 Qexit = intern ("exit");
7159 staticpro (&Qexit); */
7161 Qopen
= intern ("open");
7163 Qclosed
= intern ("closed");
7164 staticpro (&Qclosed
);
7165 Qconnect
= intern ("connect");
7166 staticpro (&Qconnect
);
7167 Qfailed
= intern ("failed");
7168 staticpro (&Qfailed
);
7169 Qlisten
= intern ("listen");
7170 staticpro (&Qlisten
);
7171 Qlocal
= intern ("local");
7172 staticpro (&Qlocal
);
7173 Qipv4
= intern ("ipv4");
7176 Qipv6
= intern ("ipv6");
7179 Qdatagram
= intern ("datagram");
7180 staticpro (&Qdatagram
);
7182 QCname
= intern (":name");
7183 staticpro (&QCname
);
7184 QCbuffer
= intern (":buffer");
7185 staticpro (&QCbuffer
);
7186 QChost
= intern (":host");
7187 staticpro (&QChost
);
7188 QCservice
= intern (":service");
7189 staticpro (&QCservice
);
7190 QCtype
= intern (":type");
7191 staticpro (&QCtype
);
7192 QClocal
= intern (":local");
7193 staticpro (&QClocal
);
7194 QCremote
= intern (":remote");
7195 staticpro (&QCremote
);
7196 QCcoding
= intern (":coding");
7197 staticpro (&QCcoding
);
7198 QCserver
= intern (":server");
7199 staticpro (&QCserver
);
7200 QCnowait
= intern (":nowait");
7201 staticpro (&QCnowait
);
7202 QCsentinel
= intern (":sentinel");
7203 staticpro (&QCsentinel
);
7204 QClog
= intern (":log");
7206 QCnoquery
= intern (":noquery");
7207 staticpro (&QCnoquery
);
7208 QCstop
= intern (":stop");
7209 staticpro (&QCstop
);
7210 QCoptions
= intern (":options");
7211 staticpro (&QCoptions
);
7212 QCplist
= intern (":plist");
7213 staticpro (&QCplist
);
7214 QCfilter_multibyte
= intern (":filter-multibyte");
7215 staticpro (&QCfilter_multibyte
);
7217 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
7218 staticpro (&Qlast_nonmenu_event
);
7220 staticpro (&Vprocess_alist
);
7222 staticpro (&deleted_pid_list
);
7225 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
7226 doc
: /* *Non-nil means delete processes immediately when they exit.
7227 A value of nil means don't delete them until `list-processes' is run. */);
7229 delete_exited_processes
= 1;
7231 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
7232 doc
: /* Control type of device used to communicate with subprocesses.
7233 Values are nil to use a pipe, or t or `pty' to use a pty.
7234 The value has no effect if the system has no ptys or if all ptys are busy:
7235 then a pipe is used in any case.
7236 The value takes effect when `start-process' is called. */);
7237 Vprocess_connection_type
= Qt
;
7239 #ifdef ADAPTIVE_READ_BUFFERING
7240 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
7241 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7242 On some systems, when Emacs reads the output from a subprocess, the output data
7243 is read in very small blocks, potentially resulting in very poor performance.
7244 This behavior can be remedied to some extent by setting this variable to a
7245 non-nil value, as it will automatically delay reading from such processes, to
7246 allow them to produce more output before Emacs tries to read it.
7247 If the value is t, the delay is reset after each write to the process; any other
7248 non-nil value means that the delay is not reset on write.
7249 The variable takes effect when `start-process' is called. */);
7250 Vprocess_adaptive_read_buffering
= Qt
;
7253 defsubr (&Sprocessp
);
7254 defsubr (&Sget_process
);
7255 defsubr (&Sget_buffer_process
);
7256 defsubr (&Sdelete_process
);
7257 defsubr (&Sprocess_status
);
7258 defsubr (&Sprocess_exit_status
);
7259 defsubr (&Sprocess_id
);
7260 defsubr (&Sprocess_name
);
7261 defsubr (&Sprocess_tty_name
);
7262 defsubr (&Sprocess_command
);
7263 defsubr (&Sset_process_buffer
);
7264 defsubr (&Sprocess_buffer
);
7265 defsubr (&Sprocess_mark
);
7266 defsubr (&Sset_process_filter
);
7267 defsubr (&Sprocess_filter
);
7268 defsubr (&Sset_process_sentinel
);
7269 defsubr (&Sprocess_sentinel
);
7270 defsubr (&Sset_process_window_size
);
7271 defsubr (&Sset_process_inherit_coding_system_flag
);
7272 defsubr (&Sprocess_inherit_coding_system_flag
);
7273 defsubr (&Sset_process_query_on_exit_flag
);
7274 defsubr (&Sprocess_query_on_exit_flag
);
7275 defsubr (&Sprocess_contact
);
7276 defsubr (&Sprocess_plist
);
7277 defsubr (&Sset_process_plist
);
7278 defsubr (&Slist_processes
);
7279 defsubr (&Sprocess_list
);
7280 defsubr (&Sstart_process
);
7282 defsubr (&Sset_network_process_option
);
7283 defsubr (&Smake_network_process
);
7284 defsubr (&Sformat_network_address
);
7285 #endif /* HAVE_SOCKETS */
7286 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
7288 defsubr (&Snetwork_interface_list
);
7290 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7291 defsubr (&Snetwork_interface_info
);
7293 #endif /* HAVE_SOCKETS ... */
7294 #ifdef DATAGRAM_SOCKETS
7295 defsubr (&Sprocess_datagram_address
);
7296 defsubr (&Sset_process_datagram_address
);
7298 defsubr (&Saccept_process_output
);
7299 defsubr (&Sprocess_send_region
);
7300 defsubr (&Sprocess_send_string
);
7301 defsubr (&Sinterrupt_process
);
7302 defsubr (&Skill_process
);
7303 defsubr (&Squit_process
);
7304 defsubr (&Sstop_process
);
7305 defsubr (&Scontinue_process
);
7306 defsubr (&Sprocess_running_child_p
);
7307 defsubr (&Sprocess_send_eof
);
7308 defsubr (&Ssignal_process
);
7309 defsubr (&Swaiting_for_user_input_p
);
7310 /* defsubr (&Sprocess_connection); */
7311 defsubr (&Sset_process_coding_system
);
7312 defsubr (&Sprocess_coding_system
);
7313 defsubr (&Sset_process_filter_multibyte
);
7314 defsubr (&Sprocess_filter_multibyte_p
);
7318 #else /* not subprocesses */
7320 #include <sys/types.h>
7324 #include "systime.h"
7325 #include "charset.h"
7327 #include "termopts.h"
7328 #include "sysselect.h"
7330 extern int frame_garbaged
;
7332 extern EMACS_TIME
timer_check ();
7333 extern int timers_run
;
7337 /* As described above, except assuming that there are no subprocesses:
7339 Wait for timeout to elapse and/or keyboard input to be available.
7342 timeout in seconds, or
7343 zero for no limit, or
7344 -1 means gobble data immediately available but don't wait for any.
7346 read_kbd is a Lisp_Object:
7347 0 to ignore keyboard input, or
7348 1 to return when input is available, or
7349 -1 means caller will actually read the input, so don't throw to
7352 see full version for other parameters. We know that wait_proc will
7353 always be NULL, since `subprocesses' isn't defined.
7355 do_display != 0 means redisplay should be done to show subprocess
7356 output that arrives.
7358 Return true if we received input from any process. */
7361 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
7362 wait_for_cell
, wait_proc
, just_wait_proc
)
7363 int time_limit
, microsecs
, read_kbd
, do_display
;
7364 Lisp_Object wait_for_cell
;
7365 struct Lisp_Process
*wait_proc
;
7369 EMACS_TIME end_time
, timeout
;
7370 SELECT_TYPE waitchannels
;
7373 /* What does time_limit really mean? */
7374 if (time_limit
|| microsecs
)
7376 EMACS_GET_TIME (end_time
);
7377 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
7378 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
7381 /* Turn off periodic alarms (in case they are in use)
7382 and then turn off any other atimers,
7383 because the select emulator uses alarms. */
7385 turn_on_atimers (0);
7389 int timeout_reduced_for_timers
= 0;
7391 /* If calling from keyboard input, do not quit
7392 since we want to return C-g as an input character.
7393 Otherwise, do pending quit if requested. */
7397 /* Exit now if the cell we're waiting for became non-nil. */
7398 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7401 /* Compute time from now till when time limit is up */
7402 /* Exit if already run out */
7403 if (time_limit
== -1)
7405 /* -1 specified for timeout means
7406 gobble output available now
7407 but don't wait at all. */
7409 EMACS_SET_SECS_USECS (timeout
, 0, 0);
7411 else if (time_limit
|| microsecs
)
7413 EMACS_GET_TIME (timeout
);
7414 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
7415 if (EMACS_TIME_NEG_P (timeout
))
7420 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7423 /* If our caller will not immediately handle keyboard events,
7424 run timer events directly.
7425 (Callers that will immediately read keyboard events
7426 call timer_delay on their own.) */
7427 if (NILP (wait_for_cell
))
7429 EMACS_TIME timer_delay
;
7433 int old_timers_run
= timers_run
;
7434 timer_delay
= timer_check (1);
7435 if (timers_run
!= old_timers_run
&& do_display
)
7436 /* We must retry, since a timer may have requeued itself
7437 and that could alter the time delay. */
7438 redisplay_preserve_echo_area (14);
7442 while (!detect_input_pending ());
7444 /* If there is unread keyboard input, also return. */
7446 && requeued_events_pending_p ())
7449 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7451 EMACS_TIME difference
;
7452 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7453 if (EMACS_TIME_NEG_P (difference
))
7455 timeout
= timer_delay
;
7456 timeout_reduced_for_timers
= 1;
7461 /* Cause C-g and alarm signals to take immediate action,
7462 and cause input available signals to zero out timeout. */
7464 set_waiting_for_input (&timeout
);
7466 /* Wait till there is something to do. */
7468 if (! read_kbd
&& NILP (wait_for_cell
))
7469 FD_ZERO (&waitchannels
);
7471 FD_SET (0, &waitchannels
);
7473 /* If a frame has been newly mapped and needs updating,
7474 reprocess its display stuff. */
7475 if (frame_garbaged
&& do_display
)
7477 clear_waiting_for_input ();
7478 redisplay_preserve_echo_area (15);
7480 set_waiting_for_input (&timeout
);
7483 if (read_kbd
&& detect_input_pending ())
7486 FD_ZERO (&waitchannels
);
7489 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7494 /* Make C-g and alarm signals set flags again */
7495 clear_waiting_for_input ();
7497 /* If we woke up due to SIGWINCH, actually change size now. */
7498 do_pending_window_change (0);
7500 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7501 /* We waited the full specified time, so return now. */
7506 /* If the system call was interrupted, then go around the
7508 if (xerrno
== EINTR
)
7509 FD_ZERO (&waitchannels
);
7511 error ("select error: %s", emacs_strerror (xerrno
));
7514 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7515 /* System sometimes fails to deliver SIGIO. */
7516 kill (getpid (), SIGIO
);
7519 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7520 kill (getpid (), SIGIO
);
7523 /* Check for keyboard input */
7526 && detect_input_pending_run_timers (do_display
))
7528 swallow_events (do_display
);
7529 if (detect_input_pending_run_timers (do_display
))
7533 /* If there is unread keyboard input, also return. */
7535 && requeued_events_pending_p ())
7538 /* If wait_for_cell. check for keyboard input
7539 but don't run any timers.
7540 ??? (It seems wrong to me to check for keyboard
7541 input at all when wait_for_cell, but the code
7542 has been this way since July 1994.
7543 Try changing this after version 19.31.) */
7544 if (! NILP (wait_for_cell
)
7545 && detect_input_pending ())
7547 swallow_events (do_display
);
7548 if (detect_input_pending ())
7552 /* Exit now if the cell we're waiting for became non-nil. */
7553 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7563 /* Don't confuse make-docfile by having two doc strings for this function.
7564 make-docfile does not pay attention to #if, for good reason! */
7565 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7568 register Lisp_Object name
;
7573 /* Don't confuse make-docfile by having two doc strings for this function.
7574 make-docfile does not pay attention to #if, for good reason! */
7575 DEFUN ("process-inherit-coding-system-flag",
7576 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7580 register Lisp_Object process
;
7582 /* Ignore the argument and return the value of
7583 inherit-process-coding-system. */
7584 return inherit_process_coding_system
? Qt
: Qnil
;
7587 /* Kill all processes associated with `buffer'.
7588 If `buffer' is nil, kill all processes.
7589 Since we have no subprocesses, this does nothing. */
7592 kill_buffer_processes (buffer
)
7605 QCtype
= intern (":type");
7606 staticpro (&QCtype
);
7608 defsubr (&Sget_buffer_process
);
7609 defsubr (&Sprocess_inherit_coding_system_flag
);
7613 #endif /* not subprocesses */
7615 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7616 (do not change this comment) */