1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 98, 1999,
3 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 /* This file is split into two parts by the following preprocessor
27 conditional. The 'then' clause contains all of the support for
28 asynchronous subprocesses. The 'else' clause contains stub
29 versions of some of the asynchronous subprocess routines that are
30 often called elsewhere in Emacs, so we don't have to #ifdef the
31 sections that call them. */
39 #include <sys/types.h> /* some typedefs are used in sys/file.h */
46 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
49 #endif /* not WINDOWSNT */
51 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
52 #include <sys/socket.h>
54 #include <netinet/in.h>
55 #include <arpa/inet.h>
56 #ifdef NEED_NET_ERRNO_H
57 #include <net/errno.h>
58 #endif /* NEED_NET_ERRNO_H */
60 /* Are local (unix) sockets supported? */
61 #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
62 #if !defined (AF_LOCAL) && defined (AF_UNIX)
63 #define AF_LOCAL AF_UNIX
66 #define HAVE_LOCAL_SOCKETS
70 #endif /* HAVE_SOCKETS */
72 /* TERM is a poor-man's SLIP, used on GNU/Linux. */
77 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
78 #ifdef HAVE_BROKEN_INET_ADDR
79 #define IN_ADDR struct in_addr
80 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
82 #define IN_ADDR unsigned long
83 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
86 #if defined(BSD_SYSTEM) || defined(STRIDE)
87 #include <sys/ioctl.h>
88 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
90 #endif /* HAVE_PTYS and no O_NDELAY */
91 #endif /* BSD_SYSTEM || STRIDE */
93 #ifdef BROKEN_O_NONBLOCK
95 #endif /* BROKEN_O_NONBLOCK */
101 /* Can we use SIOCGIFCONF and/or SIOCGIFADDR */
103 #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H)
104 /* sys/ioctl.h may have been included already */
106 #include <sys/ioctl.h>
113 #include <sys/sysmacros.h> /* for "minor" */
114 #endif /* not IRIS */
117 #include <sys/wait.h>
129 #include "termhooks.h"
130 #include "termopts.h"
131 #include "commands.h"
132 #include "keyboard.h"
134 #include "blockinput.h"
135 #include "dispextern.h"
136 #include "composite.h"
139 Lisp_Object Qprocessp
;
140 Lisp_Object Qrun
, Qstop
, Qsignal
;
141 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
142 Lisp_Object Qlocal
, Qdatagram
;
143 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
144 Lisp_Object QClocal
, QCremote
, QCcoding
;
145 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
146 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
147 Lisp_Object QCfilter_multibyte
;
148 Lisp_Object Qlast_nonmenu_event
;
149 /* QCfamily is declared and initialized in xfaces.c,
150 QCfilter in keyboard.c. */
151 extern Lisp_Object QCfamily
, QCfilter
;
153 /* Qexit is declared and initialized in eval.c. */
155 /* QCfamily is defined in xfaces.c. */
156 extern Lisp_Object QCfamily
;
157 /* QCfilter is defined in keyboard.c. */
158 extern Lisp_Object QCfilter
;
160 /* a process object is a network connection when its childp field is neither
161 Qt nor Qnil but is instead a property list (KEY VAL ...). */
164 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
165 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
167 #define NETCONN_P(p) 0
168 #define NETCONN1_P(p) 0
169 #endif /* HAVE_SOCKETS */
171 /* Define first descriptor number available for subprocesses. */
173 #define FIRST_PROC_DESC 1
175 #define FIRST_PROC_DESC 3
178 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
181 #if !defined (SIGCHLD) && defined (SIGCLD)
182 #define SIGCHLD SIGCLD
185 #include "syssignal.h"
189 extern void set_waiting_for_input
P_ ((EMACS_TIME
*));
195 extern char *sys_errlist
[];
202 /* t means use pty, nil means use a pipe,
203 maybe other values to come. */
204 static Lisp_Object Vprocess_connection_type
;
208 #include <sys/socket.h>
212 /* These next two vars are non-static since sysdep.c uses them in the
213 emulation of `select'. */
214 /* Number of events of change of status of a process. */
216 /* Number of events for which the user or sentinel has been notified. */
219 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
221 #ifdef BROKEN_NON_BLOCKING_CONNECT
222 #undef NON_BLOCKING_CONNECT
224 #ifndef NON_BLOCKING_CONNECT
227 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
228 #if defined (O_NONBLOCK) || defined (O_NDELAY)
229 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
230 #define NON_BLOCKING_CONNECT
231 #endif /* EWOULDBLOCK || EINPROGRESS */
232 #endif /* O_NONBLOCK || O_NDELAY */
233 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
234 #endif /* HAVE_SELECT */
235 #endif /* HAVE_SOCKETS */
236 #endif /* NON_BLOCKING_CONNECT */
237 #endif /* BROKEN_NON_BLOCKING_CONNECT */
239 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
240 this system. We need to read full packets, so we need a
241 "non-destructive" select. So we require either native select,
242 or emulation of select using FIONREAD. */
244 #ifdef BROKEN_DATAGRAM_SOCKETS
245 #undef DATAGRAM_SOCKETS
247 #ifndef DATAGRAM_SOCKETS
249 #if defined (HAVE_SELECT) || defined (FIONREAD)
250 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
251 #define DATAGRAM_SOCKETS
252 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
253 #endif /* HAVE_SELECT || FIONREAD */
254 #endif /* HAVE_SOCKETS */
255 #endif /* DATAGRAM_SOCKETS */
256 #endif /* BROKEN_DATAGRAM_SOCKETS */
259 #undef NON_BLOCKING_CONNECT
260 #undef DATAGRAM_SOCKETS
263 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
264 #ifdef EMACS_HAS_USECS
265 #define ADAPTIVE_READ_BUFFERING
269 #ifdef ADAPTIVE_READ_BUFFERING
270 #define READ_OUTPUT_DELAY_INCREMENT 10000
271 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
272 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
274 /* Number of processes which might be delayed. */
276 static int process_output_delay_count
;
278 /* Non-zero if any process has non-nil process_output_skip. */
280 static int process_output_skip
;
282 /* Non-nil means to delay reading process output to improve buffering.
283 A value of t means that delay is reset after each send, any other
284 non-nil value does not reset the delay. */
285 static Lisp_Object Vprocess_adaptive_read_buffering
;
287 #define process_output_delay_count 0
291 #include "sysselect.h"
293 extern int keyboard_bit_set
P_ ((SELECT_TYPE
*));
295 /* If we support a window system, turn on the code to poll periodically
296 to detect C-g. It isn't actually used when doing interrupt input. */
297 #ifdef HAVE_WINDOW_SYSTEM
298 #define POLL_FOR_INPUT
301 /* Mask of bits indicating the descriptors that we wait for input on. */
303 static SELECT_TYPE input_wait_mask
;
305 /* Mask that excludes keyboard input descriptor (s). */
307 static SELECT_TYPE non_keyboard_wait_mask
;
309 /* Mask that excludes process input descriptor (s). */
311 static SELECT_TYPE non_process_wait_mask
;
313 /* Mask of bits indicating the descriptors that we wait for connect to
314 complete on. Once they complete, they are removed from this mask
315 and added to the input_wait_mask and non_keyboard_wait_mask. */
317 static SELECT_TYPE connect_wait_mask
;
319 /* Number of bits set in connect_wait_mask. */
320 static int num_pending_connects
;
322 /* The largest descriptor currently in use for a process object. */
323 static int max_process_desc
;
325 /* The largest descriptor currently in use for keyboard input. */
326 static int max_keyboard_desc
;
328 /* Nonzero means delete a process right away if it exits. */
329 static int delete_exited_processes
;
331 /* Indexed by descriptor, gives the process (if any) for that descriptor */
332 Lisp_Object chan_process
[MAXDESC
];
334 /* Alist of elements (NAME . PROCESS) */
335 Lisp_Object Vprocess_alist
;
337 /* Buffered-ahead input char from process, indexed by channel.
338 -1 means empty (no char is buffered).
339 Used on sys V where the only way to tell if there is any
340 output from the process is to read at least one char.
341 Always -1 on systems that support FIONREAD. */
343 /* Don't make static; need to access externally. */
344 int proc_buffered_char
[MAXDESC
];
346 /* Table of `struct coding-system' for each process. */
347 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
348 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
350 #ifdef DATAGRAM_SOCKETS
351 /* Table of `partner address' for datagram sockets. */
352 struct sockaddr_and_len
{
355 } datagram_address
[MAXDESC
];
356 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
357 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
359 #define DATAGRAM_CHAN_P(chan) (0)
360 #define DATAGRAM_CONN_P(proc) (0)
363 static Lisp_Object
get_process ();
364 static void exec_sentinel ();
366 extern EMACS_TIME
timer_check ();
367 extern int timers_run
;
369 /* Maximum number of bytes to send to a pty without an eof. */
370 static int pty_max_bytes
;
372 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
378 /* The file name of the pty opened by allocate_pty. */
380 static char pty_name
[24];
383 /* Compute the Lisp form of the process status, p->status, from
384 the numeric status that was returned by `wait'. */
386 Lisp_Object
status_convert ();
390 struct Lisp_Process
*p
;
392 union { int i
; WAITTYPE wt
; } u
;
393 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
394 p
->status
= status_convert (u
.wt
);
395 p
->raw_status_low
= Qnil
;
396 p
->raw_status_high
= Qnil
;
399 /* Convert a process status word in Unix format to
400 the list that we use internally. */
407 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
408 else if (WIFEXITED (w
))
409 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
410 WCOREDUMP (w
) ? Qt
: Qnil
));
411 else if (WIFSIGNALED (w
))
412 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
413 WCOREDUMP (w
) ? Qt
: Qnil
));
418 /* Given a status-list, extract the three pieces of information
419 and store them individually through the three pointers. */
422 decode_status (l
, symbol
, code
, coredump
)
440 *code
= XFASTINT (XCAR (tem
));
442 *coredump
= !NILP (tem
);
446 /* Return a string describing a process status list. */
450 struct Lisp_Process
*p
;
452 Lisp_Object status
= p
->status
;
455 Lisp_Object string
, string2
;
457 decode_status (status
, &symbol
, &code
, &coredump
);
459 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
462 synchronize_system_messages_locale ();
463 signame
= strsignal (code
);
466 string
= build_string (signame
);
467 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
468 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
469 return concat2 (string
, string2
);
471 else if (EQ (symbol
, Qexit
))
474 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
476 return build_string ("finished\n");
477 string
= Fnumber_to_string (make_number (code
));
478 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
479 return concat3 (build_string ("exited abnormally with code "),
482 else if (EQ (symbol
, Qfailed
))
484 string
= Fnumber_to_string (make_number (code
));
485 string2
= build_string ("\n");
486 return concat3 (build_string ("failed with code "),
490 return Fcopy_sequence (Fsymbol_name (symbol
));
495 /* Open an available pty, returning a file descriptor.
496 Return -1 on failure.
497 The file name of the terminal corresponding to the pty
498 is left in the variable pty_name. */
509 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
510 for (i
= 0; i
< 16; i
++)
513 struct stat stb
; /* Used in some PTY_OPEN. */
514 #ifdef PTY_NAME_SPRINTF
517 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
518 #endif /* no PTY_NAME_SPRINTF */
522 #else /* no PTY_OPEN */
525 /* Unusual IRIS code */
526 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
529 if (fstat (fd
, &stb
) < 0)
531 # else /* not IRIS */
532 { /* Some systems name their pseudoterminals so that there are gaps in
533 the usual sequence - for example, on HP9000/S700 systems, there
534 are no pseudoterminals with names ending in 'f'. So we wait for
535 three failures in a row before deciding that we've reached the
537 int failed_count
= 0;
539 if (stat (pty_name
, &stb
) < 0)
542 if (failed_count
>= 3)
549 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
551 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
553 # endif /* not IRIS */
555 #endif /* no PTY_OPEN */
559 /* check to make certain that both sides are available
560 this avoids a nasty yet stupid bug in rlogins */
561 #ifdef PTY_TTY_NAME_SPRINTF
564 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
565 #endif /* no PTY_TTY_NAME_SPRINTF */
567 if (access (pty_name
, 6) != 0)
570 # if !defined(IRIS) && !defined(__sgi)
576 #endif /* not UNIPLUS */
583 #endif /* HAVE_PTYS */
589 register Lisp_Object val
, tem
, name1
;
590 register struct Lisp_Process
*p
;
594 p
= allocate_process ();
596 XSETINT (p
->infd
, -1);
597 XSETINT (p
->outfd
, -1);
598 XSETFASTINT (p
->pid
, 0);
599 XSETFASTINT (p
->tick
, 0);
600 XSETFASTINT (p
->update_tick
, 0);
601 p
->raw_status_low
= Qnil
;
602 p
->raw_status_high
= Qnil
;
604 p
->mark
= Fmake_marker ();
606 #ifdef ADAPTIVE_READ_BUFFERING
607 p
->adaptive_read_buffering
= Qnil
;
608 XSETFASTINT (p
->read_output_delay
, 0);
609 p
->read_output_skip
= Qnil
;
612 /* If name is already in use, modify it until it is unused. */
617 tem
= Fget_process (name1
);
618 if (NILP (tem
)) break;
619 sprintf (suffix
, "<%d>", i
);
620 name1
= concat2 (name
, build_string (suffix
));
624 XSETPROCESS (val
, p
);
625 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
630 remove_process (proc
)
631 register Lisp_Object proc
;
633 register Lisp_Object pair
;
635 pair
= Frassq (proc
, Vprocess_alist
);
636 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
638 deactivate_process (proc
);
641 /* Setup coding systems of PROCESS. */
644 setup_process_coding_systems (process
)
647 struct Lisp_Process
*p
= XPROCESS (process
);
648 int inch
= XINT (p
->infd
);
649 int outch
= XINT (p
->outfd
);
651 if (inch
< 0 || outch
< 0)
654 if (!proc_decode_coding_system
[inch
])
655 proc_decode_coding_system
[inch
]
656 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
657 setup_coding_system (p
->decode_coding_system
,
658 proc_decode_coding_system
[inch
]);
659 if (! NILP (p
->filter
))
661 if (NILP (p
->filter_multibyte
))
662 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
664 else if (BUFFERP (p
->buffer
))
666 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
667 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
670 if (!proc_encode_coding_system
[outch
])
671 proc_encode_coding_system
[outch
]
672 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
673 setup_coding_system (p
->encode_coding_system
,
674 proc_encode_coding_system
[outch
]);
677 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
678 doc
: /* Return t if OBJECT is a process. */)
682 return PROCESSP (object
) ? Qt
: Qnil
;
685 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
686 doc
: /* Return the process named NAME, or nil if there is none. */)
688 register Lisp_Object name
;
693 return Fcdr (Fassoc (name
, Vprocess_alist
));
696 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
697 doc
: /* Return the (or a) process associated with BUFFER.
698 BUFFER may be a buffer or the name of one. */)
700 register Lisp_Object buffer
;
702 register Lisp_Object buf
, tail
, proc
;
704 if (NILP (buffer
)) return Qnil
;
705 buf
= Fget_buffer (buffer
);
706 if (NILP (buf
)) return Qnil
;
708 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
710 proc
= Fcdr (Fcar (tail
));
711 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
717 /* This is how commands for the user decode process arguments. It
718 accepts a process, a process name, a buffer, a buffer name, or nil.
719 Buffers denote the first process in the buffer, and nil denotes the
724 register Lisp_Object name
;
726 register Lisp_Object proc
, obj
;
729 obj
= Fget_process (name
);
731 obj
= Fget_buffer (name
);
733 error ("Process %s does not exist", SDATA (name
));
735 else if (NILP (name
))
736 obj
= Fcurrent_buffer ();
740 /* Now obj should be either a buffer object or a process object.
744 proc
= Fget_buffer_process (obj
);
746 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
756 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
757 doc
: /* Delete PROCESS: kill it and forget about it immediately.
758 PROCESS may be a process, a buffer, the name of a process or buffer, or
759 nil, indicating the current buffer's process. */)
761 register Lisp_Object process
;
763 process
= get_process (process
);
764 XPROCESS (process
)->raw_status_low
= Qnil
;
765 XPROCESS (process
)->raw_status_high
= Qnil
;
766 if (NETCONN_P (process
))
768 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
769 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
772 else if (XINT (XPROCESS (process
)->infd
) >= 0)
774 Fkill_process (process
, Qnil
);
775 /* Do this now, since remove_process will make sigchld_handler do nothing. */
776 XPROCESS (process
)->status
777 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
778 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
781 remove_process (process
);
785 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
786 doc
: /* Return the status of PROCESS.
787 The returned value is one of the following symbols:
788 run -- for a process that is running.
789 stop -- for a process stopped but continuable.
790 exit -- for a process that has exited.
791 signal -- for a process that has got a fatal signal.
792 open -- for a network stream connection that is open.
793 listen -- for a network stream server that is listening.
794 closed -- for a network stream connection that is closed.
795 connect -- when waiting for a non-blocking connection to complete.
796 failed -- when a non-blocking connection has failed.
797 nil -- if arg is a process name and no such process exists.
798 PROCESS may be a process, a buffer, the name of a process, or
799 nil, indicating the current buffer's process. */)
801 register Lisp_Object process
;
803 register struct Lisp_Process
*p
;
804 register Lisp_Object status
;
806 if (STRINGP (process
))
807 process
= Fget_process (process
);
809 process
= get_process (process
);
814 p
= XPROCESS (process
);
815 if (!NILP (p
->raw_status_low
))
819 status
= XCAR (status
);
822 if (EQ (status
, Qexit
))
824 else if (EQ (p
->command
, Qt
))
826 else if (EQ (status
, Qrun
))
832 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
834 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
835 If PROCESS has not yet exited or died, return 0. */)
837 register Lisp_Object process
;
839 CHECK_PROCESS (process
);
840 if (!NILP (XPROCESS (process
)->raw_status_low
))
841 update_status (XPROCESS (process
));
842 if (CONSP (XPROCESS (process
)->status
))
843 return XCAR (XCDR (XPROCESS (process
)->status
));
844 return make_number (0);
847 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
848 doc
: /* Return the process id of PROCESS.
849 This is the pid of the external process which PROCESS uses or talks to.
850 For a network connection, this value is nil. */)
852 register Lisp_Object process
;
854 CHECK_PROCESS (process
);
855 return XPROCESS (process
)->pid
;
858 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
859 doc
: /* Return the name of PROCESS, as a string.
860 This is the name of the program invoked in PROCESS,
861 possibly modified to make it unique among process names. */)
863 register Lisp_Object process
;
865 CHECK_PROCESS (process
);
866 return XPROCESS (process
)->name
;
869 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
870 doc
: /* Return the command that was executed to start PROCESS.
871 This is a list of strings, the first string being the program executed
872 and the rest of the strings being the arguments given to it.
873 For a non-child channel, this is nil. */)
875 register Lisp_Object process
;
877 CHECK_PROCESS (process
);
878 return XPROCESS (process
)->command
;
881 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
882 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
883 This is the terminal that the process itself reads and writes on,
884 not the name of the pty that Emacs uses to talk with that terminal. */)
886 register Lisp_Object process
;
888 CHECK_PROCESS (process
);
889 return XPROCESS (process
)->tty_name
;
892 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
894 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
896 register Lisp_Object process
, buffer
;
898 struct Lisp_Process
*p
;
900 CHECK_PROCESS (process
);
902 CHECK_BUFFER (buffer
);
903 p
= XPROCESS (process
);
906 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
907 setup_process_coding_systems (process
);
911 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
913 doc
: /* Return the buffer PROCESS is associated with.
914 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
916 register Lisp_Object process
;
918 CHECK_PROCESS (process
);
919 return XPROCESS (process
)->buffer
;
922 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
924 doc
: /* Return the marker for the end of the last output from PROCESS. */)
926 register Lisp_Object process
;
928 CHECK_PROCESS (process
);
929 return XPROCESS (process
)->mark
;
932 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
934 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
935 t means stop accepting output from the process.
937 When a process has a filter, its buffer is not used for output.
938 Instead, each time it does output, the entire string of output is
939 passed to the filter.
941 The filter gets two arguments: the process and the string of output.
942 The string argument is normally a multibyte string, except:
943 - if the process' input coding system is no-conversion or raw-text,
944 it is a unibyte string (the non-converted input), or else
945 - if `default-enable-multibyte-characters' is nil, it is a unibyte
946 string (the result of converting the decoded input multibyte
947 string to unibyte with `string-make-unibyte'). */)
949 register Lisp_Object process
, filter
;
951 struct Lisp_Process
*p
;
953 CHECK_PROCESS (process
);
954 p
= XPROCESS (process
);
956 /* Don't signal an error if the process' input file descriptor
957 is closed. This could make debugging Lisp more difficult,
958 for example when doing something like
960 (setq process (start-process ...))
962 (set-process-filter process ...) */
964 if (XINT (p
->infd
) >= 0)
966 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
968 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
969 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
971 else if (EQ (p
->filter
, Qt
)
972 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
974 FD_SET (XINT (p
->infd
), &input_wait_mask
);
975 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
981 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
982 setup_process_coding_systems (process
);
986 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
988 doc
: /* Returns the filter function of PROCESS; nil if none.
989 See `set-process-filter' for more info on filter functions. */)
991 register Lisp_Object process
;
993 CHECK_PROCESS (process
);
994 return XPROCESS (process
)->filter
;
997 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
999 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1000 The sentinel is called as a function when the process changes state.
1001 It gets two arguments: the process, and a string describing the change. */)
1003 register Lisp_Object process
, sentinel
;
1005 struct Lisp_Process
*p
;
1007 CHECK_PROCESS (process
);
1008 p
= XPROCESS (process
);
1010 p
->sentinel
= sentinel
;
1012 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1016 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1018 doc
: /* Return the sentinel of PROCESS; nil if none.
1019 See `set-process-sentinel' for more info on sentinels. */)
1021 register Lisp_Object process
;
1023 CHECK_PROCESS (process
);
1024 return XPROCESS (process
)->sentinel
;
1027 DEFUN ("set-process-window-size", Fset_process_window_size
,
1028 Sset_process_window_size
, 3, 3, 0,
1029 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1030 (process
, height
, width
)
1031 register Lisp_Object process
, height
, width
;
1033 CHECK_PROCESS (process
);
1034 CHECK_NATNUM (height
);
1035 CHECK_NATNUM (width
);
1037 if (XINT (XPROCESS (process
)->infd
) < 0
1038 || set_window_size (XINT (XPROCESS (process
)->infd
),
1039 XINT (height
), XINT (width
)) <= 0)
1045 DEFUN ("set-process-inherit-coding-system-flag",
1046 Fset_process_inherit_coding_system_flag
,
1047 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1048 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1049 If the second argument FLAG is non-nil, then the variable
1050 `buffer-file-coding-system' of the buffer associated with PROCESS
1051 will be bound to the value of the coding system used to decode
1054 This is useful when the coding system specified for the process buffer
1055 leaves either the character code conversion or the end-of-line conversion
1056 unspecified, or if the coding system used to decode the process output
1057 is more appropriate for saving the process buffer.
1059 Binding the variable `inherit-process-coding-system' to non-nil before
1060 starting the process is an alternative way of setting the inherit flag
1061 for the process which will run. */)
1063 register Lisp_Object process
, flag
;
1065 CHECK_PROCESS (process
);
1066 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
1070 DEFUN ("process-inherit-coding-system-flag",
1071 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1073 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1074 If this flag is t, `buffer-file-coding-system' of the buffer
1075 associated with PROCESS will inherit the coding system used to decode
1076 the process output. */)
1078 register Lisp_Object process
;
1080 CHECK_PROCESS (process
);
1081 return XPROCESS (process
)->inherit_coding_system_flag
;
1084 DEFUN ("set-process-query-on-exit-flag",
1085 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1087 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1088 If the second argument FLAG is non-nil, Emacs will query the user before
1089 exiting if PROCESS is running. */)
1091 register Lisp_Object process
, flag
;
1093 CHECK_PROCESS (process
);
1094 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
1098 DEFUN ("process-query-on-exit-flag",
1099 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1101 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1103 register Lisp_Object process
;
1105 CHECK_PROCESS (process
);
1106 return Fnull (XPROCESS (process
)->kill_without_query
);
1109 #ifdef DATAGRAM_SOCKETS
1110 Lisp_Object
Fprocess_datagram_address ();
1113 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1115 doc
: /* Return the contact info of PROCESS; t for a real child.
1116 For a net connection, the value depends on the optional KEY arg.
1117 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1118 if KEY is t, the complete contact information for the connection is
1119 returned, else the specific value for the keyword KEY is returned.
1120 See `make-network-process' for a list of keywords. */)
1122 register Lisp_Object process
, key
;
1124 Lisp_Object contact
;
1126 CHECK_PROCESS (process
);
1127 contact
= XPROCESS (process
)->childp
;
1129 #ifdef DATAGRAM_SOCKETS
1130 if (DATAGRAM_CONN_P (process
)
1131 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1132 contact
= Fplist_put (contact
, QCremote
,
1133 Fprocess_datagram_address (process
));
1136 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1139 return Fcons (Fplist_get (contact
, QChost
),
1140 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1141 return Fplist_get (contact
, key
);
1144 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1146 doc
: /* Return the plist of PROCESS. */)
1148 register Lisp_Object process
;
1150 CHECK_PROCESS (process
);
1151 return XPROCESS (process
)->plist
;
1154 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1156 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1158 register Lisp_Object process
, plist
;
1160 CHECK_PROCESS (process
);
1163 XPROCESS (process
)->plist
= plist
;
1167 #if 0 /* Turned off because we don't currently record this info
1168 in the process. Perhaps add it. */
1169 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1170 doc
: /* Return the connection type of PROCESS.
1171 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1172 a socket connection. */)
1174 Lisp_Object process
;
1176 return XPROCESS (process
)->type
;
1181 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1183 doc
: /* Convert network ADDRESS from internal format to a string.
1184 If optional second argument OMIT-PORT is non-nil, don't include a port
1185 number in the string; in this case, interpret a 4 element vector as an
1186 IP address. Returns nil if format of ADDRESS is invalid. */)
1187 (address
, omit_port
)
1188 Lisp_Object address
, omit_port
;
1193 if (STRINGP (address
)) /* AF_LOCAL */
1196 if (VECTORP (address
)) /* AF_INET */
1198 register struct Lisp_Vector
*p
= XVECTOR (address
);
1199 Lisp_Object args
[6];
1202 if (!NILP (omit_port
) && (p
->size
== 4 || p
->size
== 5))
1204 args
[0] = build_string ("%d.%d.%d.%d");
1207 else if (p
->size
== 5)
1209 args
[0] = build_string ("%d.%d.%d.%d:%d");
1215 for (i
= 0; i
< nargs
; i
++)
1216 args
[i
+1] = p
->contents
[i
];
1217 return Fformat (nargs
+1, args
);
1220 if (CONSP (address
))
1222 Lisp_Object args
[2];
1223 args
[0] = build_string ("<Family %d>");
1224 args
[1] = Fcar (address
);
1225 return Fformat (2, args
);
1234 list_processes_1 (query_only
)
1235 Lisp_Object query_only
;
1237 register Lisp_Object tail
, tem
;
1238 Lisp_Object proc
, minspace
, tem1
;
1239 register struct Lisp_Process
*p
;
1241 int w_proc
, w_buffer
, w_tty
;
1242 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1244 w_proc
= 4; /* Proc */
1245 w_buffer
= 6; /* Buffer */
1246 w_tty
= 0; /* Omit if no ttys */
1248 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1252 proc
= Fcdr (Fcar (tail
));
1253 p
= XPROCESS (proc
);
1254 if (NILP (p
->childp
))
1256 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1258 if (STRINGP (p
->name
)
1259 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1261 if (!NILP (p
->buffer
))
1263 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1264 w_buffer
= 8; /* (Killed) */
1265 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1268 if (STRINGP (p
->tty_name
)
1269 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1273 XSETFASTINT (i_status
, w_proc
+ 1);
1274 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1277 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1278 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1281 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1284 XSETFASTINT (minspace
, 1);
1286 set_buffer_internal (XBUFFER (Vstandard_output
));
1287 Fbuffer_disable_undo (Vstandard_output
);
1289 current_buffer
->truncate_lines
= Qt
;
1291 write_string ("Proc", -1);
1292 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1293 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1296 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1298 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1299 write_string ("\n", -1);
1301 write_string ("----", -1);
1302 Findent_to (i_status
, minspace
); write_string ("------", -1);
1303 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1306 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1308 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1309 write_string ("\n", -1);
1311 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1315 proc
= Fcdr (Fcar (tail
));
1316 p
= XPROCESS (proc
);
1317 if (NILP (p
->childp
))
1319 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1322 Finsert (1, &p
->name
);
1323 Findent_to (i_status
, minspace
);
1325 if (!NILP (p
->raw_status_low
))
1328 if (CONSP (p
->status
))
1329 symbol
= XCAR (p
->status
);
1332 if (EQ (symbol
, Qsignal
))
1335 tem
= Fcar (Fcdr (p
->status
));
1337 if (XINT (tem
) < NSIG
)
1338 write_string (sys_errlist
[XINT (tem
)], -1);
1341 Fprinc (symbol
, Qnil
);
1343 else if (NETCONN1_P (p
))
1345 if (EQ (symbol
, Qexit
))
1346 write_string ("closed", -1);
1347 else if (EQ (p
->command
, Qt
))
1348 write_string ("stopped", -1);
1349 else if (EQ (symbol
, Qrun
))
1350 write_string ("open", -1);
1352 Fprinc (symbol
, Qnil
);
1355 Fprinc (symbol
, Qnil
);
1357 if (EQ (symbol
, Qexit
))
1360 tem
= Fcar (Fcdr (p
->status
));
1363 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1364 write_string (tembuf
, -1);
1368 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1369 remove_process (proc
);
1371 Findent_to (i_buffer
, minspace
);
1372 if (NILP (p
->buffer
))
1373 insert_string ("(none)");
1374 else if (NILP (XBUFFER (p
->buffer
)->name
))
1375 insert_string ("(Killed)");
1377 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1381 Findent_to (i_tty
, minspace
);
1382 if (STRINGP (p
->tty_name
))
1383 Finsert (1, &p
->tty_name
);
1386 Findent_to (i_command
, minspace
);
1388 if (EQ (p
->status
, Qlisten
))
1390 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1391 if (INTEGERP (port
))
1392 port
= Fnumber_to_string (port
);
1394 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1395 sprintf (tembuf
, "(network %s server on %s)\n",
1396 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1397 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1398 insert_string (tembuf
);
1400 else if (NETCONN1_P (p
))
1402 /* For a local socket, there is no host name,
1403 so display service instead. */
1404 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1405 if (!STRINGP (host
))
1407 host
= Fplist_get (p
->childp
, QCservice
);
1408 if (INTEGERP (host
))
1409 host
= Fnumber_to_string (host
);
1412 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1413 sprintf (tembuf
, "(network %s connection to %s)\n",
1414 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1415 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1416 insert_string (tembuf
);
1428 insert_string (" ");
1430 insert_string ("\n");
1436 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1437 doc
: /* Display a list of all processes.
1438 If optional argument QUERY-ONLY is non-nil, only processes with
1439 the query-on-exit flag set will be listed.
1440 Any process listed as exited or signaled is actually eliminated
1441 after the listing is made. */)
1443 Lisp_Object query_only
;
1445 internal_with_output_to_temp_buffer ("*Process List*",
1446 list_processes_1
, query_only
);
1450 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1451 doc
: /* Return a list of all processes. */)
1454 return Fmapcar (Qcdr
, Vprocess_alist
);
1457 /* Starting asynchronous inferior processes. */
1459 static Lisp_Object
start_process_unwind ();
1461 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1462 doc
: /* Start a program in a subprocess. Return the process object for it.
1463 NAME is name for process. It is modified if necessary to make it unique.
1464 BUFFER is the buffer (or buffer name) to associate with the process.
1465 Process output goes at end of that buffer, unless you specify
1466 an output stream or filter function to handle the output.
1467 BUFFER may be also nil, meaning that this process is not associated
1469 PROGRAM is the program file name. It is searched for in PATH.
1470 Remaining arguments are strings to give program as arguments.
1472 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1475 register Lisp_Object
*args
;
1477 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1479 register unsigned char *new_argv
;
1482 register unsigned char **new_argv
;
1485 int count
= SPECPDL_INDEX ();
1489 buffer
= Fget_buffer_create (buffer
);
1491 /* Make sure that the child will be able to chdir to the current
1492 buffer's current directory, or its unhandled equivalent. We
1493 can't just have the child check for an error when it does the
1494 chdir, since it's in a vfork.
1496 We have to GCPRO around this because Fexpand_file_name and
1497 Funhandled_file_name_directory might call a file name handling
1498 function. The argument list is protected by the caller, so all
1499 we really have to worry about is buffer. */
1501 struct gcpro gcpro1
, gcpro2
;
1503 current_dir
= current_buffer
->directory
;
1505 GCPRO2 (buffer
, current_dir
);
1508 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1510 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1511 report_file_error ("Setting current directory",
1512 Fcons (current_buffer
->directory
, Qnil
));
1518 CHECK_STRING (name
);
1522 CHECK_STRING (program
);
1524 proc
= make_process (name
);
1525 /* If an error occurs and we can't start the process, we want to
1526 remove it from the process list. This means that each error
1527 check in create_process doesn't need to call remove_process
1528 itself; it's all taken care of here. */
1529 record_unwind_protect (start_process_unwind
, proc
);
1531 XPROCESS (proc
)->childp
= Qt
;
1532 XPROCESS (proc
)->plist
= Qnil
;
1533 XPROCESS (proc
)->command_channel_p
= Qnil
;
1534 XPROCESS (proc
)->buffer
= buffer
;
1535 XPROCESS (proc
)->sentinel
= Qnil
;
1536 XPROCESS (proc
)->filter
= Qnil
;
1537 XPROCESS (proc
)->filter_multibyte
1538 = buffer_defaults
.enable_multibyte_characters
;
1539 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1541 #ifdef ADAPTIVE_READ_BUFFERING
1542 XPROCESS (proc
)->adaptive_read_buffering
= Vprocess_adaptive_read_buffering
;
1545 /* Make the process marker point into the process buffer (if any). */
1547 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1548 BUF_ZV (XBUFFER (buffer
)),
1549 BUF_ZV_BYTE (XBUFFER (buffer
)));
1552 /* Decide coding systems for communicating with the process. Here
1553 we don't setup the structure coding_system nor pay attention to
1554 unibyte mode. They are done in create_process. */
1556 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1557 Lisp_Object coding_systems
= Qt
;
1558 Lisp_Object val
, *args2
;
1559 struct gcpro gcpro1
, gcpro2
;
1561 val
= Vcoding_system_for_read
;
1564 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1565 args2
[0] = Qstart_process
;
1566 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1567 GCPRO2 (proc
, current_dir
);
1568 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1570 if (CONSP (coding_systems
))
1571 val
= XCAR (coding_systems
);
1572 else if (CONSP (Vdefault_process_coding_system
))
1573 val
= XCAR (Vdefault_process_coding_system
);
1575 XPROCESS (proc
)->decode_coding_system
= val
;
1577 val
= Vcoding_system_for_write
;
1580 if (EQ (coding_systems
, Qt
))
1582 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1583 args2
[0] = Qstart_process
;
1584 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1585 GCPRO2 (proc
, current_dir
);
1586 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1589 if (CONSP (coding_systems
))
1590 val
= XCDR (coding_systems
);
1591 else if (CONSP (Vdefault_process_coding_system
))
1592 val
= XCDR (Vdefault_process_coding_system
);
1594 XPROCESS (proc
)->encode_coding_system
= val
;
1598 /* Make a one member argv with all args concatenated
1599 together separated by a blank. */
1600 len
= SBYTES (program
) + 2;
1601 for (i
= 3; i
< nargs
; i
++)
1605 len
+= SBYTES (tem
) + 1; /* count the blank */
1607 new_argv
= (unsigned char *) alloca (len
);
1608 strcpy (new_argv
, SDATA (program
));
1609 for (i
= 3; i
< nargs
; i
++)
1613 strcat (new_argv
, " ");
1614 strcat (new_argv
, SDATA (tem
));
1616 /* Need to add code here to check for program existence on VMS */
1619 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1621 /* If program file name is not absolute, search our path for it.
1622 Put the name we will really use in TEM. */
1623 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1624 && !(SCHARS (program
) > 1
1625 && IS_DEVICE_SEP (SREF (program
, 1))))
1627 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1630 GCPRO4 (name
, program
, buffer
, current_dir
);
1631 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1634 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1635 tem
= Fexpand_file_name (tem
, Qnil
);
1639 if (!NILP (Ffile_directory_p (program
)))
1640 error ("Specified program for new process is a directory");
1644 /* If program file name starts with /: for quoting a magic name,
1646 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1647 && SREF (tem
, 1) == ':')
1648 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1650 /* Encode the file name and put it in NEW_ARGV.
1651 That's where the child will use it to execute the program. */
1652 tem
= ENCODE_FILE (tem
);
1653 new_argv
[0] = SDATA (tem
);
1655 /* Here we encode arguments by the coding system used for sending
1656 data to the process. We don't support using different coding
1657 systems for encoding arguments and for encoding data sent to the
1660 for (i
= 3; i
< nargs
; i
++)
1664 if (STRING_MULTIBYTE (tem
))
1665 tem
= (code_convert_string_norecord
1666 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1667 new_argv
[i
- 2] = SDATA (tem
);
1669 new_argv
[i
- 2] = 0;
1670 #endif /* not VMS */
1672 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1673 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1674 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1675 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1677 XPROCESS (proc
)->inherit_coding_system_flag
1678 = (NILP (buffer
) || !inherit_process_coding_system
1681 create_process (proc
, (char **) new_argv
, current_dir
);
1683 return unbind_to (count
, proc
);
1686 /* This function is the unwind_protect form for Fstart_process. If
1687 PROC doesn't have its pid set, then we know someone has signaled
1688 an error and the process wasn't started successfully, so we should
1689 remove it from the process list. */
1691 start_process_unwind (proc
)
1694 if (!PROCESSP (proc
))
1697 /* Was PROC started successfully? */
1698 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1699 remove_process (proc
);
1705 create_process_1 (timer
)
1706 struct atimer
*timer
;
1708 /* Nothing to do. */
1712 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1715 /* Mimic blocking of signals on system V, which doesn't really have it. */
1717 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1718 int sigchld_deferred
;
1721 create_process_sigchld ()
1723 signal (SIGCHLD
, create_process_sigchld
);
1725 sigchld_deferred
= 1;
1731 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1733 create_process (process
, new_argv
, current_dir
)
1734 Lisp_Object process
;
1736 Lisp_Object current_dir
;
1738 int pid
, inchannel
, outchannel
;
1740 #ifdef POSIX_SIGNALS
1743 struct sigaction sigint_action
;
1744 struct sigaction sigquit_action
;
1746 struct sigaction sighup_action
;
1748 #else /* !POSIX_SIGNALS */
1751 SIGTYPE (*sigchld
)();
1754 #endif /* !POSIX_SIGNALS */
1755 /* Use volatile to protect variables from being clobbered by longjmp. */
1756 volatile int forkin
, forkout
;
1757 volatile int pty_flag
= 0;
1759 extern char **environ
;
1762 inchannel
= outchannel
= -1;
1765 if (!NILP (Vprocess_connection_type
))
1766 outchannel
= inchannel
= allocate_pty ();
1770 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1771 /* On most USG systems it does not work to open the pty's tty here,
1772 then close it and reopen it in the child. */
1774 /* Don't let this terminal become our controlling terminal
1775 (in case we don't have one). */
1776 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1778 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1781 report_file_error ("Opening pty", Qnil
);
1783 forkin
= forkout
= -1;
1784 #endif /* not USG, or USG_SUBTTY_WORKS */
1788 #endif /* HAVE_PTYS */
1791 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1792 report_file_error ("Opening socketpair", Qnil
);
1793 outchannel
= inchannel
= sv
[0];
1794 forkout
= forkin
= sv
[1];
1796 #else /* not SKTPAIR */
1801 report_file_error ("Creating pipe", Qnil
);
1807 emacs_close (inchannel
);
1808 emacs_close (forkout
);
1809 report_file_error ("Creating pipe", Qnil
);
1814 #endif /* not SKTPAIR */
1817 /* Replaced by close_process_descs */
1818 set_exclusive_use (inchannel
);
1819 set_exclusive_use (outchannel
);
1822 /* Stride people say it's a mystery why this is needed
1823 as well as the O_NDELAY, but that it fails without this. */
1824 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1827 ioctl (inchannel
, FIONBIO
, &one
);
1832 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1833 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1836 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1837 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1841 /* Record this as an active process, with its channels.
1842 As a result, child_setup will close Emacs's side of the pipes. */
1843 chan_process
[inchannel
] = process
;
1844 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1845 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1847 /* Previously we recorded the tty descriptor used in the subprocess.
1848 It was only used for getting the foreground tty process, so now
1849 we just reopen the device (see emacs_get_tty_pgrp) as this is
1850 more portable (see USG_SUBTTY_WORKS above). */
1852 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1853 XPROCESS (process
)->status
= Qrun
;
1854 setup_process_coding_systems (process
);
1856 /* Delay interrupts until we have a chance to store
1857 the new fork's pid in its process structure */
1858 #ifdef POSIX_SIGNALS
1859 sigemptyset (&blocked
);
1861 sigaddset (&blocked
, SIGCHLD
);
1863 #ifdef HAVE_WORKING_VFORK
1864 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1865 this sets the parent's signal handlers as well as the child's.
1866 So delay all interrupts whose handlers the child might munge,
1867 and record the current handlers so they can be restored later. */
1868 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1869 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1871 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1873 #endif /* HAVE_WORKING_VFORK */
1874 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1875 #else /* !POSIX_SIGNALS */
1879 #else /* not BSD4_1 */
1880 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1881 sigsetmask (sigmask (SIGCHLD
));
1882 #else /* ordinary USG */
1884 sigchld_deferred
= 0;
1885 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1887 #endif /* ordinary USG */
1888 #endif /* not BSD4_1 */
1889 #endif /* SIGCHLD */
1890 #endif /* !POSIX_SIGNALS */
1892 FD_SET (inchannel
, &input_wait_mask
);
1893 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1894 if (inchannel
> max_process_desc
)
1895 max_process_desc
= inchannel
;
1897 /* Until we store the proper pid, enable sigchld_handler
1898 to recognize an unknown pid as standing for this process.
1899 It is very important not to let this `marker' value stay
1900 in the table after this function has returned; if it does
1901 it might cause call-process to hang and subsequent asynchronous
1902 processes to get their return values scrambled. */
1903 XSETINT (XPROCESS (process
)->pid
, -1);
1908 /* child_setup must clobber environ on systems with true vfork.
1909 Protect it from permanent change. */
1910 char **save_environ
= environ
;
1912 current_dir
= ENCODE_FILE (current_dir
);
1917 #endif /* not WINDOWSNT */
1919 int xforkin
= forkin
;
1920 int xforkout
= forkout
;
1922 #if 0 /* This was probably a mistake--it duplicates code later on,
1923 but fails to handle all the cases. */
1924 /* Make sure SIGCHLD is not blocked in the child. */
1925 sigsetmask (SIGEMPTYMASK
);
1928 /* Make the pty be the controlling terminal of the process. */
1930 /* First, disconnect its current controlling terminal. */
1932 /* We tried doing setsid only if pty_flag, but it caused
1933 process_set_signal to fail on SGI when using a pipe. */
1935 /* Make the pty's terminal the controlling terminal. */
1939 /* We ignore the return value
1940 because faith@cs.unc.edu says that is necessary on Linux. */
1941 ioctl (xforkin
, TIOCSCTTY
, 0);
1944 #else /* not HAVE_SETSID */
1946 /* It's very important to call setpgrp here and no time
1947 afterwards. Otherwise, we lose our controlling tty which
1948 is set when we open the pty. */
1951 #endif /* not HAVE_SETSID */
1952 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1953 if (pty_flag
&& xforkin
>= 0)
1956 tcgetattr (xforkin
, &t
);
1958 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1959 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1962 #if defined (NTTYDISC) && defined (TIOCSETD)
1963 if (pty_flag
&& xforkin
>= 0)
1965 /* Use new line discipline. */
1966 int ldisc
= NTTYDISC
;
1967 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1972 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1973 can do TIOCSPGRP only to the process's controlling tty. */
1976 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1977 I can't test it since I don't have 4.3. */
1978 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1979 ioctl (j
, TIOCNOTTY
, 0);
1982 /* In order to get a controlling terminal on some versions
1983 of BSD, it is necessary to put the process in pgrp 0
1984 before it opens the terminal. */
1992 #endif /* TIOCNOTTY */
1994 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1995 /*** There is a suggestion that this ought to be a
1996 conditional on TIOCSPGRP,
1997 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1998 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1999 that system does seem to need this code, even though
2000 both HAVE_SETSID and TIOCSCTTY are defined. */
2001 /* Now close the pty (if we had it open) and reopen it.
2002 This makes the pty the controlling terminal of the subprocess. */
2005 #ifdef SET_CHILD_PTY_PGRP
2006 int pgrp
= getpid ();
2009 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2012 emacs_close (xforkin
);
2013 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2017 emacs_write (1, "Couldn't open the pty terminal ", 31);
2018 emacs_write (1, pty_name
, strlen (pty_name
));
2019 emacs_write (1, "\n", 1);
2023 #ifdef SET_CHILD_PTY_PGRP
2024 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2025 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2028 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2030 #ifdef SETUP_SLAVE_PTY
2035 #endif /* SETUP_SLAVE_PTY */
2037 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2038 Now reenable it in the child, so it will die when we want it to. */
2040 signal (SIGHUP
, SIG_DFL
);
2042 #endif /* HAVE_PTYS */
2044 signal (SIGINT
, SIG_DFL
);
2045 signal (SIGQUIT
, SIG_DFL
);
2047 /* Stop blocking signals in the child. */
2048 #ifdef POSIX_SIGNALS
2049 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2050 #else /* !POSIX_SIGNALS */
2054 #else /* not BSD4_1 */
2055 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2056 sigsetmask (SIGEMPTYMASK
);
2057 #else /* ordinary USG */
2059 signal (SIGCHLD
, sigchld
);
2061 #endif /* ordinary USG */
2062 #endif /* not BSD4_1 */
2063 #endif /* SIGCHLD */
2064 #endif /* !POSIX_SIGNALS */
2067 child_setup_tty (xforkout
);
2069 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2070 new_argv
, 1, current_dir
);
2071 #else /* not WINDOWSNT */
2072 child_setup (xforkin
, xforkout
, xforkout
,
2073 new_argv
, 1, current_dir
);
2074 #endif /* not WINDOWSNT */
2076 environ
= save_environ
;
2081 /* This runs in the Emacs process. */
2085 emacs_close (forkin
);
2086 if (forkin
!= forkout
&& forkout
>= 0)
2087 emacs_close (forkout
);
2091 /* vfork succeeded. */
2092 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
2095 register_child (pid
, inchannel
);
2096 #endif /* WINDOWSNT */
2098 /* If the subfork execv fails, and it exits,
2099 this close hangs. I don't know why.
2100 So have an interrupt jar it loose. */
2102 struct atimer
*timer
;
2106 EMACS_SET_SECS_USECS (offset
, 1, 0);
2107 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2110 emacs_close (forkin
);
2112 cancel_atimer (timer
);
2116 if (forkin
!= forkout
&& forkout
>= 0)
2117 emacs_close (forkout
);
2121 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2124 XPROCESS (process
)->tty_name
= Qnil
;
2127 /* Restore the signal state whether vfork succeeded or not.
2128 (We will signal an error, below, if it failed.) */
2129 #ifdef POSIX_SIGNALS
2130 #ifdef HAVE_WORKING_VFORK
2131 /* Restore the parent's signal handlers. */
2132 sigaction (SIGINT
, &sigint_action
, 0);
2133 sigaction (SIGQUIT
, &sigquit_action
, 0);
2135 sigaction (SIGHUP
, &sighup_action
, 0);
2137 #endif /* HAVE_WORKING_VFORK */
2138 /* Stop blocking signals in the parent. */
2139 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2140 #else /* !POSIX_SIGNALS */
2144 #else /* not BSD4_1 */
2145 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2146 sigsetmask (SIGEMPTYMASK
);
2147 #else /* ordinary USG */
2149 signal (SIGCHLD
, sigchld
);
2150 /* Now really handle any of these signals
2151 that came in during this function. */
2152 if (sigchld_deferred
)
2153 kill (getpid (), SIGCHLD
);
2155 #endif /* ordinary USG */
2156 #endif /* not BSD4_1 */
2157 #endif /* SIGCHLD */
2158 #endif /* !POSIX_SIGNALS */
2160 /* Now generate the error if vfork failed. */
2162 report_file_error ("Doing vfork", Qnil
);
2164 #endif /* not VMS */
2169 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2170 The address family of sa is not included in the result. */
2173 conv_sockaddr_to_lisp (sa
, len
)
2174 struct sockaddr
*sa
;
2177 Lisp_Object address
;
2180 register struct Lisp_Vector
*p
;
2182 switch (sa
->sa_family
)
2186 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2187 len
= sizeof (sin
->sin_addr
) + 1;
2188 address
= Fmake_vector (make_number (len
), Qnil
);
2189 p
= XVECTOR (address
);
2190 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2191 cp
= (unsigned char *)&sin
->sin_addr
;
2194 #ifdef HAVE_LOCAL_SOCKETS
2197 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2198 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2199 if (sockun
->sun_path
[i
] == 0)
2201 return make_unibyte_string (sockun
->sun_path
, i
);
2205 len
-= sizeof (sa
->sa_family
);
2206 address
= Fcons (make_number (sa
->sa_family
),
2207 Fmake_vector (make_number (len
), Qnil
));
2208 p
= XVECTOR (XCDR (address
));
2209 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2215 p
->contents
[i
++] = make_number (*cp
++);
2221 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2224 get_lisp_to_sockaddr_size (address
, familyp
)
2225 Lisp_Object address
;
2228 register struct Lisp_Vector
*p
;
2230 if (VECTORP (address
))
2232 p
= XVECTOR (address
);
2236 return sizeof (struct sockaddr_in
);
2239 #ifdef HAVE_LOCAL_SOCKETS
2240 else if (STRINGP (address
))
2242 *familyp
= AF_LOCAL
;
2243 return sizeof (struct sockaddr_un
);
2246 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2248 struct sockaddr
*sa
;
2249 *familyp
= XINT (XCAR (address
));
2250 p
= XVECTOR (XCDR (address
));
2251 return p
->size
+ sizeof (sa
->sa_family
);
2256 /* Convert an address object (vector or string) to an internal sockaddr.
2257 Format of address has already been validated by size_lisp_to_sockaddr. */
2260 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2262 Lisp_Object address
;
2263 struct sockaddr
*sa
;
2266 register struct Lisp_Vector
*p
;
2267 register unsigned char *cp
= NULL
;
2271 sa
->sa_family
= family
;
2273 if (VECTORP (address
))
2275 p
= XVECTOR (address
);
2276 if (family
== AF_INET
)
2278 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2279 len
= sizeof (sin
->sin_addr
) + 1;
2280 i
= XINT (p
->contents
[--len
]);
2281 sin
->sin_port
= htons (i
);
2282 cp
= (unsigned char *)&sin
->sin_addr
;
2285 else if (STRINGP (address
))
2287 #ifdef HAVE_LOCAL_SOCKETS
2288 if (family
== AF_LOCAL
)
2290 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2291 cp
= SDATA (address
);
2292 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2293 sockun
->sun_path
[i
] = *cp
++;
2300 p
= XVECTOR (XCDR (address
));
2301 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2304 for (i
= 0; i
< len
; i
++)
2305 if (INTEGERP (p
->contents
[i
]))
2306 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2309 #ifdef DATAGRAM_SOCKETS
2310 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2312 doc
: /* Get the current datagram address associated with PROCESS. */)
2314 Lisp_Object process
;
2318 CHECK_PROCESS (process
);
2320 if (!DATAGRAM_CONN_P (process
))
2323 channel
= XINT (XPROCESS (process
)->infd
);
2324 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2325 datagram_address
[channel
].len
);
2328 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2330 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2331 Returns nil upon error setting address, ADDRESS otherwise. */)
2333 Lisp_Object process
, address
;
2338 CHECK_PROCESS (process
);
2340 if (!DATAGRAM_CONN_P (process
))
2343 channel
= XINT (XPROCESS (process
)->infd
);
2345 len
= get_lisp_to_sockaddr_size (address
, &family
);
2346 if (datagram_address
[channel
].len
!= len
)
2348 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2354 static struct socket_options
{
2355 /* The name of this option. Should be lowercase version of option
2356 name without SO_ prefix. */
2358 /* Option level SOL_... */
2360 /* Option number SO_... */
2362 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2363 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2364 } socket_options
[] =
2366 #ifdef SO_BINDTODEVICE
2367 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2370 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2373 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2376 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2379 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2382 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2385 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2388 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2390 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2393 /* Set option OPT to value VAL on socket S.
2395 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2396 Signals an error if setting a known option fails.
2400 set_socket_option (s
, opt
, val
)
2402 Lisp_Object opt
, val
;
2405 struct socket_options
*sopt
;
2410 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2411 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2412 if (strcmp (name
, sopt
->name
) == 0)
2415 switch (sopt
->opttype
)
2420 optval
= NILP (val
) ? 0 : 1;
2421 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2422 &optval
, sizeof (optval
));
2430 optval
= XINT (val
);
2432 error ("Bad option value for %s", name
);
2433 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2434 &optval
, sizeof (optval
));
2438 #ifdef SO_BINDTODEVICE
2441 char devname
[IFNAMSIZ
+1];
2443 /* This is broken, at least in the Linux 2.4 kernel.
2444 To unbind, the arg must be a zero integer, not the empty string.
2445 This should work on all systems. KFS. 2003-09-23. */
2446 bzero (devname
, sizeof devname
);
2449 char *arg
= (char *) SDATA (val
);
2450 int len
= min (strlen (arg
), IFNAMSIZ
);
2451 bcopy (arg
, devname
, len
);
2453 else if (!NILP (val
))
2454 error ("Bad option value for %s", name
);
2455 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2464 struct linger linger
;
2467 linger
.l_linger
= 0;
2469 linger
.l_linger
= XINT (val
);
2471 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2472 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2473 &linger
, sizeof (linger
));
2483 report_file_error ("Cannot set network option",
2484 Fcons (opt
, Fcons (val
, Qnil
)));
2485 return (1 << sopt
->optbit
);
2489 DEFUN ("set-network-process-option",
2490 Fset_network_process_option
, Sset_network_process_option
,
2492 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2493 See `make-network-process' for a list of options and values.
2494 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2495 OPTION is not a supported option, return nil instead; otherwise return t. */)
2496 (process
, option
, value
, no_error
)
2497 Lisp_Object process
, option
, value
;
2498 Lisp_Object no_error
;
2501 struct Lisp_Process
*p
;
2503 CHECK_PROCESS (process
);
2504 p
= XPROCESS (process
);
2505 if (!NETCONN1_P (p
))
2506 error ("Process is not a network process");
2510 error ("Process is not running");
2512 if (set_socket_option (s
, option
, value
))
2514 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2518 if (NILP (no_error
))
2519 error ("Unknown or unsupported option");
2525 /* A version of request_sigio suitable for a record_unwind_protect. */
2528 unwind_request_sigio (dummy
)
2531 if (interrupt_input
)
2536 /* Create a network stream/datagram client/server process. Treated
2537 exactly like a normal process when reading and writing. Primary
2538 differences are in status display and process deletion. A network
2539 connection has no PID; you cannot signal it. All you can do is
2540 stop/continue it and deactivate/close it via delete-process */
2542 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2544 doc
: /* Create and return a network server or client process.
2546 In Emacs, network connections are represented by process objects, so
2547 input and output work as for subprocesses and `delete-process' closes
2548 a network connection. However, a network process has no process id,
2549 it cannot be signalled, and the status codes are different from normal
2552 Arguments are specified as keyword/argument pairs. The following
2553 arguments are defined:
2555 :name NAME -- NAME is name for process. It is modified if necessary
2558 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2559 with the process. Process output goes at end of that buffer, unless
2560 you specify an output stream or filter function to handle the output.
2561 BUFFER may be also nil, meaning that this process is not associated
2564 :host HOST -- HOST is name of the host to connect to, or its IP
2565 address. The symbol `local' specifies the local host. If specified
2566 for a server process, it must be a valid name or address for the local
2567 host, and only clients connecting to that address will be accepted.
2569 :service SERVICE -- SERVICE is name of the service desired, or an
2570 integer specifying a port number to connect to. If SERVICE is t,
2571 a random port number is selected for the server.
2573 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2574 stream type connection, `datagram' creates a datagram type connection.
2576 :family FAMILY -- FAMILY is the address (and protocol) family for the
2577 service specified by HOST and SERVICE. The default address family is
2578 Inet (or IPv4) for the host and port number specified by HOST and
2579 SERVICE. Other address families supported are:
2580 local -- for a local (i.e. UNIX) address specified by SERVICE.
2582 :local ADDRESS -- ADDRESS is the local address used for the connection.
2583 This parameter is ignored when opening a client process. When specified
2584 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2586 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2587 connection. This parameter is ignored when opening a stream server
2588 process. For a datagram server process, it specifies the initial
2589 setting of the remote datagram address. When specified for a client
2590 process, the FAMILY, HOST, and SERVICE args are ignored.
2592 The format of ADDRESS depends on the address family:
2593 - An IPv4 address is represented as an vector of integers [A B C D P]
2594 corresponding to numeric IP address A.B.C.D and port number P.
2595 - A local address is represented as a string with the address in the
2596 local address space.
2597 - An "unsupported family" address is represented by a cons (F . AV)
2598 where F is the family number and AV is a vector containing the socket
2599 address data with one element per address data byte. Do not rely on
2600 this format in portable code, as it may depend on implementation
2601 defined constants, data sizes, and data structure alignment.
2603 :coding CODING -- If CODING is a symbol, it specifies the coding
2604 system used for both reading and writing for this process. If CODING
2605 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2606 ENCODING is used for writing.
2608 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2609 return without waiting for the connection to complete; instead, the
2610 sentinel function will be called with second arg matching "open" (if
2611 successful) or "failed" when the connect completes. Default is to use
2612 a blocking connect (i.e. wait) for stream type connections.
2614 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2615 running when Emacs is exited.
2617 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2618 In the stopped state, a server process does not accept new
2619 connections, and a client process does not handle incoming traffic.
2620 The stopped state is cleared by `continue-process' and set by
2623 :filter FILTER -- Install FILTER as the process filter.
2625 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2626 process filter are multibyte, otherwise they are unibyte.
2627 If this keyword is not specified, the strings are multibyte iff
2628 `default-enable-multibyte-characters' is non-nil.
2630 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2632 :log LOG -- Install LOG as the server process log function. This
2633 function is called when the server accepts a network connection from a
2634 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2635 is the server process, CLIENT is the new process for the connection,
2636 and MESSAGE is a string.
2638 :plist PLIST -- Install PLIST as the new process' initial plist.
2640 :server QLEN -- if QLEN is non-nil, create a server process for the
2641 specified FAMILY, SERVICE, and connection type (stream or datagram).
2642 If QLEN is an integer, it is used as the max. length of the server's
2643 pending connection queue (also known as the backlog); the default
2644 queue length is 5. Default is to create a client process.
2646 The following network options can be specified for this connection:
2648 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2649 :dontroute BOOL -- Only send to directly connected hosts.
2650 :keepalive BOOL -- Send keep-alive messages on network stream.
2651 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2652 :oobinline BOOL -- Place out-of-band data in receive data stream.
2653 :priority INT -- Set protocol defined priority for sent packets.
2654 :reuseaddr BOOL -- Allow reusing a recently used local address
2655 (this is allowed by default for a server process).
2656 :bindtodevice NAME -- bind to interface NAME. Using this may require
2657 special privileges on some systems.
2659 Consult the relevant system programmer's manual pages for more
2660 information on using these options.
2663 A server process will listen for and accept connections from clients.
2664 When a client connection is accepted, a new network process is created
2665 for the connection with the following parameters:
2667 - The client's process name is constructed by concatenating the server
2668 process' NAME and a client identification string.
2669 - If the FILTER argument is non-nil, the client process will not get a
2670 separate process buffer; otherwise, the client's process buffer is a newly
2671 created buffer named after the server process' BUFFER name or process
2672 NAME concatenated with the client identification string.
2673 - The connection type and the process filter and sentinel parameters are
2674 inherited from the server process' TYPE, FILTER and SENTINEL.
2675 - The client process' contact info is set according to the client's
2676 addressing information (typically an IP address and a port number).
2677 - The client process' plist is initialized from the server's plist.
2679 Notice that the FILTER and SENTINEL args are never used directly by
2680 the server process. Also, the BUFFER argument is not used directly by
2681 the server process, but via the optional :log function, accepted (and
2682 failed) connections may be logged in the server process' buffer.
2684 The original argument list, modified with the actual connection
2685 information, is available via the `process-contact' function.
2687 usage: (make-network-process &rest ARGS) */)
2693 Lisp_Object contact
;
2694 struct Lisp_Process
*p
;
2695 #ifdef HAVE_GETADDRINFO
2696 struct addrinfo ai
, *res
, *lres
;
2697 struct addrinfo hints
;
2698 char *portstring
, portbuf
[128];
2699 #else /* HAVE_GETADDRINFO */
2700 struct _emacs_addrinfo
2706 struct sockaddr
*ai_addr
;
2707 struct _emacs_addrinfo
*ai_next
;
2709 #endif /* HAVE_GETADDRINFO */
2710 struct sockaddr_in address_in
;
2711 #ifdef HAVE_LOCAL_SOCKETS
2712 struct sockaddr_un address_un
;
2717 int s
= -1, outch
, inch
;
2718 struct gcpro gcpro1
;
2720 int count
= SPECPDL_INDEX ();
2722 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2724 Lisp_Object name
, buffer
, host
, service
, address
;
2725 Lisp_Object filter
, sentinel
;
2726 int is_non_blocking_client
= 0;
2727 int is_server
= 0, backlog
= 5;
2734 /* Save arguments for process-contact and clone-process. */
2735 contact
= Flist (nargs
, args
);
2739 /* Ensure socket support is loaded if available. */
2740 init_winsock (TRUE
);
2743 /* :type TYPE (nil: stream, datagram */
2744 tem
= Fplist_get (contact
, QCtype
);
2746 socktype
= SOCK_STREAM
;
2747 #ifdef DATAGRAM_SOCKETS
2748 else if (EQ (tem
, Qdatagram
))
2749 socktype
= SOCK_DGRAM
;
2752 error ("Unsupported connection type");
2755 tem
= Fplist_get (contact
, QCserver
);
2758 /* Don't support network sockets when non-blocking mode is
2759 not available, since a blocked Emacs is not useful. */
2760 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2761 error ("Network servers not supported");
2765 backlog
= XINT (tem
);
2769 /* Make QCaddress an alias for :local (server) or :remote (client). */
2770 QCaddress
= is_server
? QClocal
: QCremote
;
2773 if (!is_server
&& socktype
== SOCK_STREAM
2774 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2776 #ifndef NON_BLOCKING_CONNECT
2777 error ("Non-blocking connect not supported");
2779 is_non_blocking_client
= 1;
2783 name
= Fplist_get (contact
, QCname
);
2784 buffer
= Fplist_get (contact
, QCbuffer
);
2785 filter
= Fplist_get (contact
, QCfilter
);
2786 sentinel
= Fplist_get (contact
, QCsentinel
);
2788 CHECK_STRING (name
);
2791 /* Let's handle TERM before things get complicated ... */
2792 host
= Fplist_get (contact
, QChost
);
2793 CHECK_STRING (host
);
2795 service
= Fplist_get (contact
, QCservice
);
2796 if (INTEGERP (service
))
2797 port
= htons ((unsigned short) XINT (service
));
2800 struct servent
*svc_info
;
2801 CHECK_STRING (service
);
2802 svc_info
= getservbyname (SDATA (service
), "tcp");
2804 error ("Unknown service: %s", SDATA (service
));
2805 port
= svc_info
->s_port
;
2808 s
= connect_server (0);
2810 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2811 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2812 send_command (s
, C_DUMB
, 1, 0);
2814 #else /* not TERM */
2816 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2817 ai
.ai_socktype
= socktype
;
2822 /* :local ADDRESS or :remote ADDRESS */
2823 address
= Fplist_get (contact
, QCaddress
);
2824 if (!NILP (address
))
2826 host
= service
= Qnil
;
2828 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2829 error ("Malformed :address");
2830 ai
.ai_family
= family
;
2831 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2832 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2836 /* :family FAMILY -- nil (for Inet), local, or integer. */
2837 tem
= Fplist_get (contact
, QCfamily
);
2839 family
= XINT (tem
);
2844 #ifdef HAVE_LOCAL_SOCKETS
2845 else if (EQ (tem
, Qlocal
))
2850 error ("Unknown address family");
2851 ai
.ai_family
= family
;
2853 /* :service SERVICE -- string, integer (port number), or t (random port). */
2854 service
= Fplist_get (contact
, QCservice
);
2856 #ifdef HAVE_LOCAL_SOCKETS
2857 if (family
== AF_LOCAL
)
2859 /* Host is not used. */
2861 CHECK_STRING (service
);
2862 bzero (&address_un
, sizeof address_un
);
2863 address_un
.sun_family
= AF_LOCAL
;
2864 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
2865 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2866 ai
.ai_addrlen
= sizeof address_un
;
2871 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2872 host
= Fplist_get (contact
, QChost
);
2875 if (EQ (host
, Qlocal
))
2876 host
= build_string ("localhost");
2877 CHECK_STRING (host
);
2880 /* Slow down polling to every ten seconds.
2881 Some kernels have a bug which causes retrying connect to fail
2882 after a connect. Polling can interfere with gethostbyname too. */
2883 #ifdef POLL_FOR_INPUT
2884 if (socktype
== SOCK_STREAM
)
2886 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2887 bind_polling_period (10);
2891 #ifdef HAVE_GETADDRINFO
2892 /* If we have a host, use getaddrinfo to resolve both host and service.
2893 Otherwise, use getservbyname to lookup the service. */
2897 /* SERVICE can either be a string or int.
2898 Convert to a C string for later use by getaddrinfo. */
2899 if (EQ (service
, Qt
))
2901 else if (INTEGERP (service
))
2903 sprintf (portbuf
, "%ld", (long) XINT (service
));
2904 portstring
= portbuf
;
2908 CHECK_STRING (service
);
2909 portstring
= SDATA (service
);
2914 memset (&hints
, 0, sizeof (hints
));
2916 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2917 hints
.ai_socktype
= socktype
;
2918 hints
.ai_protocol
= 0;
2919 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
2921 #ifdef HAVE_GAI_STRERROR
2922 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
2924 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
2930 #endif /* HAVE_GETADDRINFO */
2932 /* We end up here if getaddrinfo is not defined, or in case no hostname
2933 has been specified (e.g. for a local server process). */
2935 if (EQ (service
, Qt
))
2937 else if (INTEGERP (service
))
2938 port
= htons ((unsigned short) XINT (service
));
2941 struct servent
*svc_info
;
2942 CHECK_STRING (service
);
2943 svc_info
= getservbyname (SDATA (service
),
2944 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2946 error ("Unknown service: %s", SDATA (service
));
2947 port
= svc_info
->s_port
;
2950 bzero (&address_in
, sizeof address_in
);
2951 address_in
.sin_family
= family
;
2952 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2953 address_in
.sin_port
= port
;
2955 #ifndef HAVE_GETADDRINFO
2958 struct hostent
*host_info_ptr
;
2960 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2961 as it may `hang' Emacs for a very long time. */
2964 host_info_ptr
= gethostbyname (SDATA (host
));
2969 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2970 host_info_ptr
->h_length
);
2971 family
= host_info_ptr
->h_addrtype
;
2972 address_in
.sin_family
= family
;
2975 /* Attempt to interpret host as numeric inet address */
2977 IN_ADDR numeric_addr
;
2978 numeric_addr
= inet_addr ((char *) SDATA (host
));
2979 if (NUMERIC_ADDR_ERROR
)
2980 error ("Unknown host \"%s\"", SDATA (host
));
2982 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2983 sizeof (address_in
.sin_addr
));
2987 #endif /* not HAVE_GETADDRINFO */
2989 ai
.ai_family
= family
;
2990 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
2991 ai
.ai_addrlen
= sizeof address_in
;
2995 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
2996 when connect is interrupted. So let's not let it get interrupted.
2997 Note we do not turn off polling, because polling is only used
2998 when not interrupt_input, and thus not normally used on the systems
2999 which have this bug. On systems which use polling, there's no way
3000 to quit if polling is turned off. */
3002 && !is_server
&& socktype
== SOCK_STREAM
)
3004 /* Comment from KFS: The original open-network-stream code
3005 didn't unwind protect this, but it seems like the proper
3006 thing to do. In any case, I don't see how it could harm to
3007 do this -- and it makes cleanup (using unbind_to) easier. */
3008 record_unwind_protect (unwind_request_sigio
, Qnil
);
3012 /* Do this in case we never enter the for-loop below. */
3013 count1
= SPECPDL_INDEX ();
3016 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3020 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3027 #ifdef DATAGRAM_SOCKETS
3028 if (!is_server
&& socktype
== SOCK_DGRAM
)
3030 #endif /* DATAGRAM_SOCKETS */
3032 #ifdef NON_BLOCKING_CONNECT
3033 if (is_non_blocking_client
)
3036 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3038 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3050 /* Make us close S if quit. */
3051 record_unwind_protect (close_file_unwind
, make_number (s
));
3053 /* Parse network options in the arg list.
3054 We simply ignore anything which isn't a known option (including other keywords).
3055 An error is signalled if setting a known option fails. */
3056 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3057 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3061 /* Configure as a server socket. */
3063 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3064 explicit :reuseaddr key to override this. */
3065 #ifdef HAVE_LOCAL_SOCKETS
3066 if (family
!= AF_LOCAL
)
3068 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3071 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3072 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3075 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3076 report_file_error ("Cannot bind server socket", Qnil
);
3078 #ifdef HAVE_GETSOCKNAME
3079 if (EQ (service
, Qt
))
3081 struct sockaddr_in sa1
;
3082 int len1
= sizeof (sa1
);
3083 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3085 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3086 service
= make_number (ntohs (sa1
.sin_port
));
3087 contact
= Fplist_put (contact
, QCservice
, service
);
3092 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3093 report_file_error ("Cannot listen on server socket", Qnil
);
3103 /* This turns off all alarm-based interrupts; the
3104 bind_polling_period call above doesn't always turn all the
3105 short-interval ones off, especially if interrupt_input is
3108 It'd be nice to be able to control the connect timeout
3109 though. Would non-blocking connect calls be portable?
3111 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3113 turn_on_atimers (0);
3115 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3118 turn_on_atimers (1);
3120 if (ret
== 0 || xerrno
== EISCONN
)
3122 /* The unwind-protect will be discarded afterwards.
3123 Likewise for immediate_quit. */
3127 #ifdef NON_BLOCKING_CONNECT
3129 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3133 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3141 if (xerrno
== EINTR
)
3143 if (xerrno
== EADDRINUSE
&& retry
< 20)
3145 /* A delay here is needed on some FreeBSD systems,
3146 and it is harmless, since this retrying takes time anyway
3147 and should be infrequent. */
3148 Fsleep_for (make_number (1), Qnil
);
3153 /* Discard the unwind protect closing S. */
3154 specpdl_ptr
= specpdl
+ count1
;
3161 #ifdef DATAGRAM_SOCKETS
3162 if (socktype
== SOCK_DGRAM
)
3164 if (datagram_address
[s
].sa
)
3166 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3167 datagram_address
[s
].len
= lres
->ai_addrlen
;
3171 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3172 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3175 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3176 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3177 conv_lisp_to_sockaddr (rfamily
, remote
,
3178 datagram_address
[s
].sa
, rlen
);
3182 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3185 contact
= Fplist_put (contact
, QCaddress
,
3186 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3187 #ifdef HAVE_GETSOCKNAME
3190 struct sockaddr_in sa1
;
3191 int len1
= sizeof (sa1
);
3192 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3193 contact
= Fplist_put (contact
, QClocal
,
3194 conv_sockaddr_to_lisp (&sa1
, len1
));
3199 #ifdef HAVE_GETADDRINFO
3206 /* Discard the unwind protect for closing S, if any. */
3207 specpdl_ptr
= specpdl
+ count1
;
3209 /* Unwind bind_polling_period and request_sigio. */
3210 unbind_to (count
, Qnil
);
3214 /* If non-blocking got this far - and failed - assume non-blocking is
3215 not supported after all. This is probably a wrong assumption, but
3216 the normal blocking calls to open-network-stream handles this error
3218 if (is_non_blocking_client
)
3223 report_file_error ("make server process failed", contact
);
3225 report_file_error ("make client process failed", contact
);
3228 #endif /* not TERM */
3234 buffer
= Fget_buffer_create (buffer
);
3235 proc
= make_process (name
);
3237 chan_process
[inch
] = proc
;
3240 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3243 fcntl (inch
, F_SETFL
, O_NDELAY
);
3247 p
= XPROCESS (proc
);
3249 p
->childp
= contact
;
3250 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3253 p
->sentinel
= sentinel
;
3255 p
->filter_multibyte
= buffer_defaults
.enable_multibyte_characters
;
3256 /* Override the above only if :filter-multibyte is specified. */
3257 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3258 p
->filter_multibyte
= Fplist_get (contact
, QCfilter_multibyte
);
3259 p
->log
= Fplist_get (contact
, QClog
);
3260 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3261 p
->kill_without_query
= Qt
;
3262 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3265 XSETINT (p
->infd
, inch
);
3266 XSETINT (p
->outfd
, outch
);
3267 if (is_server
&& socktype
== SOCK_STREAM
)
3268 p
->status
= Qlisten
;
3270 #ifdef NON_BLOCKING_CONNECT
3271 if (is_non_blocking_client
)
3273 /* We may get here if connect did succeed immediately. However,
3274 in that case, we still need to signal this like a non-blocking
3276 p
->status
= Qconnect
;
3277 if (!FD_ISSET (inch
, &connect_wait_mask
))
3279 FD_SET (inch
, &connect_wait_mask
);
3280 num_pending_connects
++;
3285 /* A server may have a client filter setting of Qt, but it must
3286 still listen for incoming connects unless it is stopped. */
3287 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3288 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3290 FD_SET (inch
, &input_wait_mask
);
3291 FD_SET (inch
, &non_keyboard_wait_mask
);
3294 if (inch
> max_process_desc
)
3295 max_process_desc
= inch
;
3297 tem
= Fplist_member (contact
, QCcoding
);
3298 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3299 tem
= Qnil
; /* No error message (too late!). */
3302 /* Setup coding systems for communicating with the network stream. */
3303 struct gcpro gcpro1
;
3304 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3305 Lisp_Object coding_systems
= Qt
;
3306 Lisp_Object args
[5], val
;
3310 val
= XCAR (XCDR (tem
));
3314 else if (!NILP (Vcoding_system_for_read
))
3315 val
= Vcoding_system_for_read
;
3316 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3317 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3318 /* We dare not decode end-of-line format by setting VAL to
3319 Qraw_text, because the existing Emacs Lisp libraries
3320 assume that they receive bare code including a sequene of
3325 if (NILP (host
) || NILP (service
))
3326 coding_systems
= Qnil
;
3329 args
[0] = Qopen_network_stream
, args
[1] = name
,
3330 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3332 coding_systems
= Ffind_operation_coding_system (5, args
);
3335 if (CONSP (coding_systems
))
3336 val
= XCAR (coding_systems
);
3337 else if (CONSP (Vdefault_process_coding_system
))
3338 val
= XCAR (Vdefault_process_coding_system
);
3342 p
->decode_coding_system
= val
;
3346 val
= XCAR (XCDR (tem
));
3350 else if (!NILP (Vcoding_system_for_write
))
3351 val
= Vcoding_system_for_write
;
3352 else if (NILP (current_buffer
->enable_multibyte_characters
))
3356 if (EQ (coding_systems
, Qt
))
3358 if (NILP (host
) || NILP (service
))
3359 coding_systems
= Qnil
;
3362 args
[0] = Qopen_network_stream
, args
[1] = name
,
3363 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3365 coding_systems
= Ffind_operation_coding_system (5, args
);
3369 if (CONSP (coding_systems
))
3370 val
= XCDR (coding_systems
);
3371 else if (CONSP (Vdefault_process_coding_system
))
3372 val
= XCDR (Vdefault_process_coding_system
);
3376 p
->encode_coding_system
= val
;
3378 setup_process_coding_systems (proc
);
3380 p
->decoding_buf
= make_uninit_string (0);
3381 p
->decoding_carryover
= make_number (0);
3382 p
->encoding_buf
= make_uninit_string (0);
3383 p
->encoding_carryover
= make_number (0);
3385 p
->inherit_coding_system_flag
3386 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3392 #endif /* HAVE_SOCKETS */
3395 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3398 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3399 doc
: /* Return an alist of all network interfaces and their network address.
3400 Each element is a cons, the car of which is a string containing the
3401 interface name, and the cdr is the network address in internal
3402 format; see the description of ADDRESS in `make-network-process'. */)
3405 struct ifconf ifconf
;
3406 struct ifreq
*ifreqs
= NULL
;
3411 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3417 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3418 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3425 ifconf
.ifc_len
= buf_size
;
3426 ifconf
.ifc_req
= ifreqs
;
3427 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3433 if (ifconf
.ifc_len
== buf_size
)
3437 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3440 while (--ifaces
>= 0)
3442 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3443 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3444 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3446 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3447 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3448 res
= Fcons (Fcons (build_string (namebuf
),
3449 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3450 sizeof (struct sockaddr
))),
3456 #endif /* SIOCGIFCONF */
3458 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3465 static struct ifflag_def ifflag_table
[] = {
3469 #ifdef IFF_BROADCAST
3470 { IFF_BROADCAST
, "broadcast" },
3473 { IFF_DEBUG
, "debug" },
3476 { IFF_LOOPBACK
, "loopback" },
3478 #ifdef IFF_POINTOPOINT
3479 { IFF_POINTOPOINT
, "pointopoint" },
3482 { IFF_RUNNING
, "running" },
3485 { IFF_NOARP
, "noarp" },
3488 { IFF_PROMISC
, "promisc" },
3490 #ifdef IFF_NOTRAILERS
3491 { IFF_NOTRAILERS
, "notrailers" },
3494 { IFF_ALLMULTI
, "allmulti" },
3497 { IFF_MASTER
, "master" },
3500 { IFF_SLAVE
, "slave" },
3502 #ifdef IFF_MULTICAST
3503 { IFF_MULTICAST
, "multicast" },
3506 { IFF_PORTSEL
, "portsel" },
3508 #ifdef IFF_AUTOMEDIA
3509 { IFF_AUTOMEDIA
, "automedia" },
3512 { IFF_DYNAMIC
, "dynamic" },
3517 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3518 doc
: /* Return information about network interface named IFNAME.
3519 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3520 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3521 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3522 FLAGS is the current flags of the interface. */)
3527 Lisp_Object res
= Qnil
;
3532 CHECK_STRING (ifname
);
3534 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3535 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3537 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3542 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3543 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3545 int flags
= rq
.ifr_flags
;
3546 struct ifflag_def
*fp
;
3550 for (fp
= ifflag_table
; flags
!= 0 && fp
; fp
++)
3552 if (flags
& fp
->flag_bit
)
3554 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3555 flags
-= fp
->flag_bit
;
3558 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3560 if (flags
& (1 << fnum
))
3562 elt
= Fcons (make_number (fnum
), elt
);
3567 res
= Fcons (elt
, res
);
3570 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3571 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3573 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3574 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3578 for (n
= 0; n
< 6; n
++)
3579 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3580 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3583 res
= Fcons (elt
, res
);
3586 #if defined(SIOCGIFNETMASK) && defined(ifr_netmask)
3587 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3590 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3593 res
= Fcons (elt
, res
);
3596 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3597 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3600 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3603 res
= Fcons (elt
, res
);
3606 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3607 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3610 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3613 res
= Fcons (elt
, res
);
3617 return any
? res
: Qnil
;
3620 #endif /* HAVE_SOCKETS */
3622 /* Turn off input and output for process PROC. */
3625 deactivate_process (proc
)
3628 register int inchannel
, outchannel
;
3629 register struct Lisp_Process
*p
= XPROCESS (proc
);
3631 inchannel
= XINT (p
->infd
);
3632 outchannel
= XINT (p
->outfd
);
3634 #ifdef ADAPTIVE_READ_BUFFERING
3635 if (XINT (p
->read_output_delay
) > 0)
3637 if (--process_output_delay_count
< 0)
3638 process_output_delay_count
= 0;
3639 XSETINT (p
->read_output_delay
, 0);
3640 p
->read_output_skip
= Qnil
;
3646 /* Beware SIGCHLD hereabouts. */
3647 flush_pending_output (inchannel
);
3650 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3651 sys$
dassgn (outchannel
);
3652 vs
= get_vms_process_pointer (p
->pid
);
3654 give_back_vms_process_stuff (vs
);
3657 emacs_close (inchannel
);
3658 if (outchannel
>= 0 && outchannel
!= inchannel
)
3659 emacs_close (outchannel
);
3662 XSETINT (p
->infd
, -1);
3663 XSETINT (p
->outfd
, -1);
3664 #ifdef DATAGRAM_SOCKETS
3665 if (DATAGRAM_CHAN_P (inchannel
))
3667 xfree (datagram_address
[inchannel
].sa
);
3668 datagram_address
[inchannel
].sa
= 0;
3669 datagram_address
[inchannel
].len
= 0;
3672 chan_process
[inchannel
] = Qnil
;
3673 FD_CLR (inchannel
, &input_wait_mask
);
3674 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3675 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3677 FD_CLR (inchannel
, &connect_wait_mask
);
3678 if (--num_pending_connects
< 0)
3681 if (inchannel
== max_process_desc
)
3684 /* We just closed the highest-numbered process input descriptor,
3685 so recompute the highest-numbered one now. */
3686 max_process_desc
= 0;
3687 for (i
= 0; i
< MAXDESC
; i
++)
3688 if (!NILP (chan_process
[i
]))
3689 max_process_desc
= i
;
3694 /* Close all descriptors currently in use for communication
3695 with subprocess. This is used in a newly-forked subprocess
3696 to get rid of irrelevant descriptors. */
3699 close_process_descs ()
3703 for (i
= 0; i
< MAXDESC
; i
++)
3705 Lisp_Object process
;
3706 process
= chan_process
[i
];
3707 if (!NILP (process
))
3709 int in
= XINT (XPROCESS (process
)->infd
);
3710 int out
= XINT (XPROCESS (process
)->outfd
);
3713 if (out
>= 0 && in
!= out
)
3720 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3722 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3723 It is read into the process' buffers or given to their filter functions.
3724 Non-nil arg PROCESS means do not return until some output has been received
3726 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3727 seconds and microseconds to wait; return after that much time whether
3728 or not there is input.
3729 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3730 from PROCESS, suspending reading output from other processes.
3731 If JUST-THIS-ONE is an integer, don't run any timers either.
3732 Return non-nil iff we received any output before the timeout expired. */)
3733 (process
, timeout
, timeout_msecs
, just_this_one
)
3734 register Lisp_Object process
, timeout
, timeout_msecs
, just_this_one
;
3739 if (! NILP (process
))
3740 CHECK_PROCESS (process
);
3742 just_this_one
= Qnil
;
3744 if (! NILP (timeout_msecs
))
3746 CHECK_NUMBER (timeout_msecs
);
3747 useconds
= XINT (timeout_msecs
);
3748 if (!INTEGERP (timeout
))
3749 XSETINT (timeout
, 0);
3752 int carry
= useconds
/ 1000000;
3754 XSETINT (timeout
, XINT (timeout
) + carry
);
3755 useconds
-= carry
* 1000000;
3757 /* I think this clause is necessary because C doesn't
3758 guarantee a particular rounding direction for negative
3762 XSETINT (timeout
, XINT (timeout
) - 1);
3763 useconds
+= 1000000;
3770 if (! NILP (timeout
))
3772 CHECK_NUMBER (timeout
);
3773 seconds
= XINT (timeout
);
3774 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3778 seconds
= NILP (process
) ? -1 : 0;
3781 (wait_reading_process_output (seconds
, useconds
, 0, 0,
3783 !NILP (process
) ? XPROCESS (process
) : NULL
,
3784 NILP (just_this_one
) ? 0 :
3785 !INTEGERP (just_this_one
) ? 1 : -1)
3789 /* Accept a connection for server process SERVER on CHANNEL. */
3791 static int connect_counter
= 0;
3794 server_accept_connection (server
, channel
)
3798 Lisp_Object proc
, caller
, name
, buffer
;
3799 Lisp_Object contact
, host
, service
;
3800 struct Lisp_Process
*ps
= XPROCESS (server
);
3801 struct Lisp_Process
*p
;
3805 struct sockaddr_in in
;
3806 #ifdef HAVE_LOCAL_SOCKETS
3807 struct sockaddr_un un
;
3810 int len
= sizeof saddr
;
3812 s
= accept (channel
, &saddr
.sa
, &len
);
3821 if (code
== EWOULDBLOCK
)
3825 if (!NILP (ps
->log
))
3826 call3 (ps
->log
, server
, Qnil
,
3827 concat3 (build_string ("accept failed with code"),
3828 Fnumber_to_string (make_number (code
)),
3829 build_string ("\n")));
3835 /* Setup a new process to handle the connection. */
3837 /* Generate a unique identification of the caller, and build contact
3838 information for this process. */
3841 switch (saddr
.sa
.sa_family
)
3845 Lisp_Object args
[5];
3846 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3847 args
[0] = build_string ("%d.%d.%d.%d");
3848 args
[1] = make_number (*ip
++);
3849 args
[2] = make_number (*ip
++);
3850 args
[3] = make_number (*ip
++);
3851 args
[4] = make_number (*ip
++);
3852 host
= Fformat (5, args
);
3853 service
= make_number (ntohs (saddr
.in
.sin_port
));
3855 args
[0] = build_string (" <%s:%d>");
3858 caller
= Fformat (3, args
);
3862 #ifdef HAVE_LOCAL_SOCKETS
3866 caller
= Fnumber_to_string (make_number (connect_counter
));
3867 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3871 /* Create a new buffer name for this process if it doesn't have a
3872 filter. The new buffer name is based on the buffer name or
3873 process name of the server process concatenated with the caller
3876 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3880 buffer
= ps
->buffer
;
3882 buffer
= Fbuffer_name (buffer
);
3887 buffer
= concat2 (buffer
, caller
);
3888 buffer
= Fget_buffer_create (buffer
);
3892 /* Generate a unique name for the new server process. Combine the
3893 server process name with the caller identification. */
3895 name
= concat2 (ps
->name
, caller
);
3896 proc
= make_process (name
);
3898 chan_process
[s
] = proc
;
3901 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3904 fcntl (s
, F_SETFL
, O_NDELAY
);
3908 p
= XPROCESS (proc
);
3910 /* Build new contact information for this setup. */
3911 contact
= Fcopy_sequence (ps
->childp
);
3912 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3913 contact
= Fplist_put (contact
, QChost
, host
);
3914 if (!NILP (service
))
3915 contact
= Fplist_put (contact
, QCservice
, service
);
3916 contact
= Fplist_put (contact
, QCremote
,
3917 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3918 #ifdef HAVE_GETSOCKNAME
3920 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
3921 contact
= Fplist_put (contact
, QClocal
,
3922 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3925 p
->childp
= contact
;
3926 p
->plist
= Fcopy_sequence (ps
->plist
);
3929 p
->sentinel
= ps
->sentinel
;
3930 p
->filter
= ps
->filter
;
3933 XSETINT (p
->infd
, s
);
3934 XSETINT (p
->outfd
, s
);
3937 /* Client processes for accepted connections are not stopped initially. */
3938 if (!EQ (p
->filter
, Qt
))
3940 FD_SET (s
, &input_wait_mask
);
3941 FD_SET (s
, &non_keyboard_wait_mask
);
3944 if (s
> max_process_desc
)
3945 max_process_desc
= s
;
3947 /* Setup coding system for new process based on server process.
3948 This seems to be the proper thing to do, as the coding system
3949 of the new process should reflect the settings at the time the
3950 server socket was opened; not the current settings. */
3952 p
->decode_coding_system
= ps
->decode_coding_system
;
3953 p
->encode_coding_system
= ps
->encode_coding_system
;
3954 setup_process_coding_systems (proc
);
3956 p
->decoding_buf
= make_uninit_string (0);
3957 p
->decoding_carryover
= make_number (0);
3958 p
->encoding_buf
= make_uninit_string (0);
3959 p
->encoding_carryover
= make_number (0);
3961 p
->inherit_coding_system_flag
3962 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3964 if (!NILP (ps
->log
))
3965 call3 (ps
->log
, server
, proc
,
3966 concat3 (build_string ("accept from "),
3967 (STRINGP (host
) ? host
: build_string ("-")),
3968 build_string ("\n")));
3970 if (!NILP (p
->sentinel
))
3971 exec_sentinel (proc
,
3972 concat3 (build_string ("open from "),
3973 (STRINGP (host
) ? host
: build_string ("-")),
3974 build_string ("\n")));
3977 /* This variable is different from waiting_for_input in keyboard.c.
3978 It is used to communicate to a lisp process-filter/sentinel (via the
3979 function Fwaiting_for_user_input_p below) whether Emacs was waiting
3980 for user-input when that process-filter was called.
3981 waiting_for_input cannot be used as that is by definition 0 when
3982 lisp code is being evalled.
3983 This is also used in record_asynch_buffer_change.
3984 For that purpose, this must be 0
3985 when not inside wait_reading_process_output. */
3986 static int waiting_for_user_input_p
;
3988 /* This is here so breakpoints can be put on it. */
3990 wait_reading_process_output_1 ()
3994 /* Read and dispose of subprocess output while waiting for timeout to
3995 elapse and/or keyboard input to be available.
3998 timeout in seconds, or
3999 zero for no limit, or
4000 -1 means gobble data immediately available but don't wait for any.
4003 an additional duration to wait, measured in microseconds.
4004 If this is nonzero and time_limit is 0, then the timeout
4005 consists of MICROSECS only.
4007 READ_KBD is a lisp value:
4008 0 to ignore keyboard input, or
4009 1 to return when input is available, or
4010 -1 meaning caller will actually read the input, so don't throw to
4011 the quit handler, or
4013 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4014 output that arrives.
4016 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4017 (and gobble terminal input into the buffer if any arrives).
4019 If WAIT_PROC is specified, wait until something arrives from that
4020 process. The return value is true iff we read some input from
4023 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4024 (suspending output from other processes). A negative value
4025 means don't run any timers either.
4027 If WAIT_PROC is specified, then the function returns true iff we
4028 received input from that process before the timeout elapsed.
4029 Otherwise, return true iff we received input from any process. */
4032 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4033 wait_for_cell
, wait_proc
, just_wait_proc
)
4034 int time_limit
, microsecs
, read_kbd
, do_display
;
4035 Lisp_Object wait_for_cell
;
4036 struct Lisp_Process
*wait_proc
;
4039 register int channel
, nfds
;
4040 SELECT_TYPE Available
;
4041 SELECT_TYPE Connecting
;
4042 int check_connect
, check_delay
, no_avail
;
4045 EMACS_TIME timeout
, end_time
;
4046 int wait_channel
= -1;
4047 int got_some_input
= 0;
4048 /* Either nil or a cons cell, the car of which is of interest and
4049 may be changed outside of this routine. */
4050 int saved_waiting_for_user_input_p
= waiting_for_user_input_p
;
4052 FD_ZERO (&Available
);
4053 FD_ZERO (&Connecting
);
4055 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4056 if (wait_proc
!= NULL
)
4057 wait_channel
= XINT (wait_proc
->infd
);
4059 waiting_for_user_input_p
= read_kbd
;
4061 /* Since we may need to wait several times,
4062 compute the absolute time to return at. */
4063 if (time_limit
|| microsecs
)
4065 EMACS_GET_TIME (end_time
);
4066 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4067 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4069 #ifdef POLL_INTERRUPTED_SYS_CALL
4070 /* AlainF 5-Jul-1996
4071 HP-UX 10.10 seem to have problems with signals coming in
4072 Causes "poll: interrupted system call" messages when Emacs is run
4074 Turn off periodic alarms (in case they are in use),
4075 and then turn off any other atimers. */
4077 turn_on_atimers (0);
4078 #endif /* POLL_INTERRUPTED_SYS_CALL */
4082 int timeout_reduced_for_timers
= 0;
4084 /* If calling from keyboard input, do not quit
4085 since we want to return C-g as an input character.
4086 Otherwise, do pending quit if requested. */
4090 else if (interrupt_input_pending
)
4091 handle_async_input ();
4094 /* Exit now if the cell we're waiting for became non-nil. */
4095 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4098 /* Compute time from now till when time limit is up */
4099 /* Exit if already run out */
4100 if (time_limit
== -1)
4102 /* -1 specified for timeout means
4103 gobble output available now
4104 but don't wait at all. */
4106 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4108 else if (time_limit
|| microsecs
)
4110 EMACS_GET_TIME (timeout
);
4111 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4112 if (EMACS_TIME_NEG_P (timeout
))
4117 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4120 /* Normally we run timers here.
4121 But not if wait_for_cell; in those cases,
4122 the wait is supposed to be short,
4123 and those callers cannot handle running arbitrary Lisp code here. */
4124 if (NILP (wait_for_cell
)
4125 && just_wait_proc
>= 0)
4127 EMACS_TIME timer_delay
;
4131 int old_timers_run
= timers_run
;
4132 struct buffer
*old_buffer
= current_buffer
;
4134 timer_delay
= timer_check (1);
4136 /* If a timer has run, this might have changed buffers
4137 an alike. Make read_key_sequence aware of that. */
4138 if (timers_run
!= old_timers_run
4139 && old_buffer
!= current_buffer
4140 && waiting_for_user_input_p
== -1)
4141 record_asynch_buffer_change ();
4143 if (timers_run
!= old_timers_run
&& do_display
)
4144 /* We must retry, since a timer may have requeued itself
4145 and that could alter the time_delay. */
4146 redisplay_preserve_echo_area (9);
4150 while (!detect_input_pending ());
4152 /* If there is unread keyboard input, also return. */
4154 && requeued_events_pending_p ())
4157 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4159 EMACS_TIME difference
;
4160 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4161 if (EMACS_TIME_NEG_P (difference
))
4163 timeout
= timer_delay
;
4164 timeout_reduced_for_timers
= 1;
4167 /* If time_limit is -1, we are not going to wait at all. */
4168 else if (time_limit
!= -1)
4170 /* This is so a breakpoint can be put here. */
4171 wait_reading_process_output_1 ();
4175 /* Cause C-g and alarm signals to take immediate action,
4176 and cause input available signals to zero out timeout.
4178 It is important that we do this before checking for process
4179 activity. If we get a SIGCHLD after the explicit checks for
4180 process activity, timeout is the only way we will know. */
4182 set_waiting_for_input (&timeout
);
4184 /* If status of something has changed, and no input is
4185 available, notify the user of the change right away. After
4186 this explicit check, we'll let the SIGCHLD handler zap
4187 timeout to get our attention. */
4188 if (update_tick
!= process_tick
&& do_display
)
4190 SELECT_TYPE Atemp
, Ctemp
;
4192 Atemp
= input_wait_mask
;
4194 /* On Mac OS X 10.0, the SELECT system call always says input is
4195 present (for reading) at stdin, even when none is. This
4196 causes the call to SELECT below to return 1 and
4197 status_notify not to be called. As a result output of
4198 subprocesses are incorrectly discarded.
4202 Ctemp
= connect_wait_mask
;
4203 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4204 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
4206 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4207 (SELECT_TYPE
*)0, &timeout
)
4210 /* It's okay for us to do this and then continue with
4211 the loop, since timeout has already been zeroed out. */
4212 clear_waiting_for_input ();
4217 /* Don't wait for output from a non-running process. Just
4218 read whatever data has already been received. */
4219 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
4220 update_status (wait_proc
);
4222 && ! EQ (wait_proc
->status
, Qrun
)
4223 && ! EQ (wait_proc
->status
, Qconnect
))
4225 int nread
, total_nread
= 0;
4227 clear_waiting_for_input ();
4228 XSETPROCESS (proc
, wait_proc
);
4230 /* Read data from the process, until we exhaust it. */
4231 while (XINT (wait_proc
->infd
) >= 0)
4233 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
4239 total_nread
+= nread
;
4241 else if (nread
== -1 && EIO
== errno
)
4245 else if (nread
== -1 && EAGAIN
== errno
)
4249 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4253 if (total_nread
> 0 && do_display
)
4254 redisplay_preserve_echo_area (10);
4259 /* Wait till there is something to do */
4261 if (wait_proc
&& just_wait_proc
)
4263 if (XINT (wait_proc
->infd
) < 0) /* Terminated */
4265 FD_SET (XINT (wait_proc
->infd
), &Available
);
4266 check_connect
= check_delay
= 0;
4268 else if (!NILP (wait_for_cell
))
4270 Available
= non_process_wait_mask
;
4271 check_connect
= check_delay
= 0;
4276 Available
= non_keyboard_wait_mask
;
4278 Available
= input_wait_mask
;
4279 check_connect
= (num_pending_connects
> 0);
4280 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4283 /* If frame size has changed or the window is newly mapped,
4284 redisplay now, before we start to wait. There is a race
4285 condition here; if a SIGIO arrives between now and the select
4286 and indicates that a frame is trashed, the select may block
4287 displaying a trashed screen. */
4288 if (frame_garbaged
&& do_display
)
4290 clear_waiting_for_input ();
4291 redisplay_preserve_echo_area (11);
4293 set_waiting_for_input (&timeout
);
4297 if (read_kbd
&& detect_input_pending ())
4305 Connecting
= connect_wait_mask
;
4307 #ifdef ADAPTIVE_READ_BUFFERING
4308 if (process_output_skip
&& check_delay
> 0)
4310 int usecs
= EMACS_USECS (timeout
);
4311 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4312 usecs
= READ_OUTPUT_DELAY_MAX
;
4313 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4315 proc
= chan_process
[channel
];
4318 if (XINT (XPROCESS (proc
)->read_output_delay
) > 0)
4321 if (NILP (XPROCESS (proc
)->read_output_skip
))
4323 FD_CLR (channel
, &Available
);
4324 XPROCESS (proc
)->read_output_skip
= Qnil
;
4325 if (XINT (XPROCESS (proc
)->read_output_delay
) < usecs
)
4326 usecs
= XINT (XPROCESS (proc
)->read_output_delay
);
4329 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4330 process_output_skip
= 0;
4334 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
4336 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4337 (SELECT_TYPE
*)0, &timeout
);
4342 /* Make C-g and alarm signals set flags again */
4343 clear_waiting_for_input ();
4345 /* If we woke up due to SIGWINCH, actually change size now. */
4346 do_pending_window_change (0);
4348 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4349 /* We wanted the full specified time, so return now. */
4353 if (xerrno
== EINTR
)
4356 /* Ultrix select seems to return ENOMEM when it is
4357 interrupted. Treat it just like EINTR. Bleah. Note
4358 that we want to test for the "ultrix" CPP symbol, not
4359 "__ultrix__"; the latter is only defined under GCC, but
4360 not by DEC's bundled CC. -JimB */
4361 else if (xerrno
== ENOMEM
)
4365 /* This happens for no known reason on ALLIANT.
4366 I am guessing that this is the right response. -- RMS. */
4367 else if (xerrno
== EFAULT
)
4370 else if (xerrno
== EBADF
)
4373 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4374 the child's closure of the pts gives the parent a SIGHUP, and
4375 the ptc file descriptor is automatically closed,
4376 yielding EBADF here or at select() call above.
4377 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4378 in m/ibmrt-aix.h), and here we just ignore the select error.
4379 Cleanup occurs c/o status_notify after SIGCLD. */
4380 no_avail
= 1; /* Cannot depend on values returned */
4386 error ("select error: %s", emacs_strerror (xerrno
));
4391 FD_ZERO (&Available
);
4395 #if defined(sun) && !defined(USG5_4)
4396 if (nfds
> 0 && keyboard_bit_set (&Available
)
4398 /* System sometimes fails to deliver SIGIO.
4400 David J. Mackenzie says that Emacs doesn't compile under
4401 Solaris if this code is enabled, thus the USG5_4 in the CPP
4402 conditional. "I haven't noticed any ill effects so far.
4403 If you find a Solaris expert somewhere, they might know
4405 kill (getpid (), SIGIO
);
4408 #if 0 /* When polling is used, interrupt_input is 0,
4409 so get_input_pending should read the input.
4410 So this should not be needed. */
4411 /* If we are using polling for input,
4412 and we see input available, make it get read now.
4413 Otherwise it might not actually get read for a second.
4414 And on hpux, since we turn off polling in wait_reading_process_output,
4415 it might never get read at all if we don't spend much time
4416 outside of wait_reading_process_output. */
4417 if (read_kbd
&& interrupt_input
4418 && keyboard_bit_set (&Available
)
4419 && input_polling_used ())
4420 kill (getpid (), SIGALRM
);
4423 /* Check for keyboard input */
4424 /* If there is any, return immediately
4425 to give it higher priority than subprocesses */
4429 int old_timers_run
= timers_run
;
4430 struct buffer
*old_buffer
= current_buffer
;
4433 if (detect_input_pending_run_timers (do_display
))
4435 swallow_events (do_display
);
4436 if (detect_input_pending_run_timers (do_display
))
4440 /* If a timer has run, this might have changed buffers
4441 an alike. Make read_key_sequence aware of that. */
4442 if (timers_run
!= old_timers_run
4443 && waiting_for_user_input_p
== -1
4444 && old_buffer
!= current_buffer
)
4445 record_asynch_buffer_change ();
4451 /* If there is unread keyboard input, also return. */
4453 && requeued_events_pending_p ())
4456 /* If we are not checking for keyboard input now,
4457 do process events (but don't run any timers).
4458 This is so that X events will be processed.
4459 Otherwise they may have to wait until polling takes place.
4460 That would causes delays in pasting selections, for example.
4462 (We used to do this only if wait_for_cell.) */
4463 if (read_kbd
== 0 && detect_input_pending ())
4465 swallow_events (do_display
);
4466 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4467 if (detect_input_pending ())
4472 /* Exit now if the cell we're waiting for became non-nil. */
4473 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4477 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4478 go read it. This can happen with X on BSD after logging out.
4479 In that case, there really is no input and no SIGIO,
4480 but select says there is input. */
4482 if (read_kbd
&& interrupt_input
4483 && keyboard_bit_set (&Available
) && ! noninteractive
)
4484 kill (getpid (), SIGIO
);
4488 got_some_input
|= nfds
> 0;
4490 /* If checking input just got us a size-change event from X,
4491 obey it now if we should. */
4492 if (read_kbd
|| ! NILP (wait_for_cell
))
4493 do_pending_window_change (0);
4495 /* Check for data from a process. */
4496 if (no_avail
|| nfds
== 0)
4499 /* Really FIRST_PROC_DESC should be 0 on Unix,
4500 but this is safer in the short run. */
4501 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4503 if (FD_ISSET (channel
, &Available
)
4504 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4508 /* If waiting for this channel, arrange to return as
4509 soon as no more input to be processed. No more
4511 if (wait_channel
== channel
)
4517 proc
= chan_process
[channel
];
4521 /* If this is a server stream socket, accept connection. */
4522 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4524 server_accept_connection (proc
, channel
);
4528 /* Read data from the process, starting with our
4529 buffered-ahead character if we have one. */
4531 nread
= read_process_output (proc
, channel
);
4534 /* Since read_process_output can run a filter,
4535 which can call accept-process-output,
4536 don't try to read from any other processes
4537 before doing the select again. */
4538 FD_ZERO (&Available
);
4541 redisplay_preserve_echo_area (12);
4544 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4547 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4548 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4550 else if (nread
== -1 && errno
== EAGAIN
)
4554 else if (nread
== -1 && errno
== EAGAIN
)
4556 /* Note that we cannot distinguish between no input
4557 available now and a closed pipe.
4558 With luck, a closed pipe will be accompanied by
4559 subprocess termination and SIGCHLD. */
4560 else if (nread
== 0 && !NETCONN_P (proc
))
4562 #endif /* O_NDELAY */
4563 #endif /* O_NONBLOCK */
4565 /* On some OSs with ptys, when the process on one end of
4566 a pty exits, the other end gets an error reading with
4567 errno = EIO instead of getting an EOF (0 bytes read).
4568 Therefore, if we get an error reading and errno =
4569 EIO, just continue, because the child process has
4570 exited and should clean itself up soon (e.g. when we
4573 However, it has been known to happen that the SIGCHLD
4574 got lost. So raise the signl again just in case.
4576 else if (nread
== -1 && errno
== EIO
)
4577 kill (getpid (), SIGCHLD
);
4578 #endif /* HAVE_PTYS */
4579 /* If we can detect process termination, don't consider the process
4580 gone just because its pipe is closed. */
4582 else if (nread
== 0 && !NETCONN_P (proc
))
4587 /* Preserve status of processes already terminated. */
4588 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4589 deactivate_process (proc
);
4590 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4591 update_status (XPROCESS (proc
));
4592 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4593 XPROCESS (proc
)->status
4594 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4597 #ifdef NON_BLOCKING_CONNECT
4598 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4599 && FD_ISSET (channel
, &connect_wait_mask
))
4601 struct Lisp_Process
*p
;
4603 FD_CLR (channel
, &connect_wait_mask
);
4604 if (--num_pending_connects
< 0)
4607 proc
= chan_process
[channel
];
4611 p
= XPROCESS (proc
);
4614 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4615 So only use it on systems where it is known to work. */
4617 int xlen
= sizeof(xerrno
);
4618 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4623 struct sockaddr pname
;
4624 int pnamelen
= sizeof(pname
);
4626 /* If connection failed, getpeername will fail. */
4628 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4630 /* Obtain connect failure code through error slippage. */
4633 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4640 XSETINT (p
->tick
, ++process_tick
);
4641 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4642 deactivate_process (proc
);
4647 /* Execute the sentinel here. If we had relied on
4648 status_notify to do it later, it will read input
4649 from the process before calling the sentinel. */
4650 exec_sentinel (proc
, build_string ("open\n"));
4651 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4653 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4654 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4658 #endif /* NON_BLOCKING_CONNECT */
4659 } /* end for each file descriptor */
4660 } /* end while exit conditions not met */
4662 waiting_for_user_input_p
= saved_waiting_for_user_input_p
;
4664 /* If calling from keyboard input, do not quit
4665 since we want to return C-g as an input character.
4666 Otherwise, do pending quit if requested. */
4669 /* Prevent input_pending from remaining set if we quit. */
4670 clear_input_pending ();
4673 #ifdef POLL_INTERRUPTED_SYS_CALL
4674 /* AlainF 5-Jul-1996
4675 HP-UX 10.10 seems to have problems with signals coming in
4676 Causes "poll: interrupted system call" messages when Emacs is run
4678 Turn periodic alarms back on */
4680 #endif /* POLL_INTERRUPTED_SYS_CALL */
4682 return got_some_input
;
4685 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4688 read_process_output_call (fun_and_args
)
4689 Lisp_Object fun_and_args
;
4691 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4695 read_process_output_error_handler (error
)
4698 cmd_error_internal (error
, "error in process filter: ");
4700 update_echo_area ();
4701 Fsleep_for (make_number (2), Qnil
);
4705 /* Read pending output from the process channel,
4706 starting with our buffered-ahead character if we have one.
4707 Yield number of decoded characters read.
4709 This function reads at most 4096 characters.
4710 If you want to read all available subprocess output,
4711 you must call it repeatedly until it returns zero.
4713 The characters read are decoded according to PROC's coding-system
4717 read_process_output (proc
, channel
)
4719 register int channel
;
4721 register int nbytes
;
4723 register Lisp_Object outstream
;
4724 register struct buffer
*old
= current_buffer
;
4725 register struct Lisp_Process
*p
= XPROCESS (proc
);
4726 register int opoint
;
4727 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4728 int carryover
= XINT (p
->decoding_carryover
);
4732 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4734 vs
= get_vms_process_pointer (p
->pid
);
4738 return (0); /* Really weird if it does this */
4739 if (!(vs
->iosb
[0] & 1))
4740 return -1; /* I/O error */
4743 error ("Could not get VMS process pointer");
4744 chars
= vs
->inputBuffer
;
4745 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4748 start_vms_process_read (vs
); /* Crank up the next read on the process */
4749 return 1; /* Nothing worth printing, say we got 1 */
4753 /* The data carried over in the previous decoding (which are at
4754 the tail of decoding buffer) should be prepended to the new
4755 data read to decode all together. */
4756 chars
= (char *) alloca (nbytes
+ carryover
);
4757 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4758 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4762 chars
= (char *) alloca (carryover
+ readmax
);
4764 /* See the comment above. */
4765 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4767 #ifdef DATAGRAM_SOCKETS
4768 /* We have a working select, so proc_buffered_char is always -1. */
4769 if (DATAGRAM_CHAN_P (channel
))
4771 int len
= datagram_address
[channel
].len
;
4772 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
4773 0, datagram_address
[channel
].sa
, &len
);
4777 if (proc_buffered_char
[channel
] < 0)
4779 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
4780 #ifdef ADAPTIVE_READ_BUFFERING
4781 if (nbytes
> 0 && !NILP (p
->adaptive_read_buffering
))
4783 int delay
= XINT (p
->read_output_delay
);
4786 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
4789 process_output_delay_count
++;
4790 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
4793 else if (delay
> 0 && (nbytes
== readmax
))
4795 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
4797 process_output_delay_count
--;
4799 XSETINT (p
->read_output_delay
, delay
);
4802 p
->read_output_skip
= Qt
;
4803 process_output_skip
= 1;
4810 chars
[carryover
] = proc_buffered_char
[channel
];
4811 proc_buffered_char
[channel
] = -1;
4812 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
4816 nbytes
= nbytes
+ 1;
4818 #endif /* not VMS */
4820 XSETINT (p
->decoding_carryover
, 0);
4822 /* At this point, NBYTES holds number of bytes just received
4823 (including the one in proc_buffered_char[channel]). */
4826 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4828 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4831 /* Now set NBYTES how many bytes we must decode. */
4832 nbytes
+= carryover
;
4834 /* Read and dispose of the process output. */
4835 outstream
= p
->filter
;
4836 if (!NILP (outstream
))
4838 /* We inhibit quit here instead of just catching it so that
4839 hitting ^G when a filter happens to be running won't screw
4841 int count
= SPECPDL_INDEX ();
4842 Lisp_Object odeactivate
;
4843 Lisp_Object obuffer
, okeymap
;
4845 int outer_running_asynch_code
= running_asynch_code
;
4846 int waiting
= waiting_for_user_input_p
;
4848 /* No need to gcpro these, because all we do with them later
4849 is test them for EQness, and none of them should be a string. */
4850 odeactivate
= Vdeactivate_mark
;
4851 XSETBUFFER (obuffer
, current_buffer
);
4852 okeymap
= current_buffer
->keymap
;
4854 specbind (Qinhibit_quit
, Qt
);
4855 specbind (Qlast_nonmenu_event
, Qt
);
4857 /* In case we get recursively called,
4858 and we already saved the match data nonrecursively,
4859 save the same match data in safely recursive fashion. */
4860 if (outer_running_asynch_code
)
4863 /* Don't clobber the CURRENT match data, either! */
4864 tem
= Fmatch_data (Qnil
, Qnil
);
4865 restore_match_data ();
4866 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4867 Fset_match_data (tem
);
4870 /* For speed, if a search happens within this code,
4871 save the match data in a special nonrecursive fashion. */
4872 running_asynch_code
= 1;
4874 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4876 Vlast_coding_system_used
= coding
->symbol
;
4877 /* A new coding system might be found. */
4878 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4880 p
->decode_coding_system
= coding
->symbol
;
4882 /* Don't call setup_coding_system for
4883 proc_decode_coding_system[channel] here. It is done in
4884 detect_coding called via decode_coding above. */
4886 /* If a coding system for encoding is not yet decided, we set
4887 it as the same as coding-system for decoding.
4889 But, before doing that we must check if
4890 proc_encode_coding_system[p->outfd] surely points to a
4891 valid memory because p->outfd will be changed once EOF is
4892 sent to the process. */
4893 if (NILP (p
->encode_coding_system
)
4894 && proc_encode_coding_system
[XINT (p
->outfd
)])
4896 p
->encode_coding_system
= coding
->symbol
;
4897 setup_coding_system (coding
->symbol
,
4898 proc_encode_coding_system
[XINT (p
->outfd
)]);
4902 carryover
= nbytes
- coding
->consumed
;
4903 if (SCHARS (p
->decoding_buf
) < carryover
)
4904 p
->decoding_buf
= make_uninit_string (carryover
);
4905 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4907 XSETINT (p
->decoding_carryover
, carryover
);
4908 /* Adjust the multibyteness of TEXT to that of the filter. */
4909 if (NILP (p
->filter_multibyte
) != ! STRING_MULTIBYTE (text
))
4910 text
= (STRING_MULTIBYTE (text
)
4911 ? Fstring_as_unibyte (text
)
4912 : Fstring_to_multibyte (text
));
4913 if (SBYTES (text
) > 0)
4914 internal_condition_case_1 (read_process_output_call
,
4916 Fcons (proc
, Fcons (text
, Qnil
))),
4917 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4918 read_process_output_error_handler
);
4920 /* If we saved the match data nonrecursively, restore it now. */
4921 restore_match_data ();
4922 running_asynch_code
= outer_running_asynch_code
;
4924 /* Handling the process output should not deactivate the mark. */
4925 Vdeactivate_mark
= odeactivate
;
4927 /* Restore waiting_for_user_input_p as it was
4928 when we were called, in case the filter clobbered it. */
4929 waiting_for_user_input_p
= waiting
;
4931 #if 0 /* Call record_asynch_buffer_change unconditionally,
4932 because we might have changed minor modes or other things
4933 that affect key bindings. */
4934 if (! EQ (Fcurrent_buffer (), obuffer
)
4935 || ! EQ (current_buffer
->keymap
, okeymap
))
4937 /* But do it only if the caller is actually going to read events.
4938 Otherwise there's no need to make him wake up, and it could
4939 cause trouble (for example it would make Fsit_for return). */
4940 if (waiting_for_user_input_p
== -1)
4941 record_asynch_buffer_change ();
4944 start_vms_process_read (vs
);
4946 unbind_to (count
, Qnil
);
4950 /* If no filter, write into buffer if it isn't dead. */
4951 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4953 Lisp_Object old_read_only
;
4954 int old_begv
, old_zv
;
4955 int old_begv_byte
, old_zv_byte
;
4956 Lisp_Object odeactivate
;
4957 int before
, before_byte
;
4962 odeactivate
= Vdeactivate_mark
;
4964 Fset_buffer (p
->buffer
);
4966 opoint_byte
= PT_BYTE
;
4967 old_read_only
= current_buffer
->read_only
;
4970 old_begv_byte
= BEGV_BYTE
;
4971 old_zv_byte
= ZV_BYTE
;
4973 current_buffer
->read_only
= Qnil
;
4975 /* Insert new output into buffer
4976 at the current end-of-output marker,
4977 thus preserving logical ordering of input and output. */
4978 if (XMARKER (p
->mark
)->buffer
)
4979 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
4980 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
4983 SET_PT_BOTH (ZV
, ZV_BYTE
);
4985 before_byte
= PT_BYTE
;
4987 /* If the output marker is outside of the visible region, save
4988 the restriction and widen. */
4989 if (! (BEGV
<= PT
&& PT
<= ZV
))
4992 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4994 Vlast_coding_system_used
= coding
->symbol
;
4995 /* A new coding system might be found. See the comment in the
4996 similar code in the previous `if' block. */
4997 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4999 p
->decode_coding_system
= coding
->symbol
;
5000 if (NILP (p
->encode_coding_system
)
5001 && proc_encode_coding_system
[XINT (p
->outfd
)])
5003 p
->encode_coding_system
= coding
->symbol
;
5004 setup_coding_system (coding
->symbol
,
5005 proc_encode_coding_system
[XINT (p
->outfd
)]);
5008 carryover
= nbytes
- coding
->consumed
;
5009 if (SCHARS (p
->decoding_buf
) < carryover
)
5010 p
->decoding_buf
= make_uninit_string (carryover
);
5011 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5013 XSETINT (p
->decoding_carryover
, carryover
);
5014 /* Adjust the multibyteness of TEXT to that of the buffer. */
5015 if (NILP (current_buffer
->enable_multibyte_characters
)
5016 != ! STRING_MULTIBYTE (text
))
5017 text
= (STRING_MULTIBYTE (text
)
5018 ? Fstring_as_unibyte (text
)
5019 : Fstring_to_multibyte (text
));
5020 /* Insert before markers in case we are inserting where
5021 the buffer's mark is, and the user's next command is Meta-y. */
5022 insert_from_string_before_markers (text
, 0, 0,
5023 SCHARS (text
), SBYTES (text
), 0);
5025 /* Make sure the process marker's position is valid when the
5026 process buffer is changed in the signal_after_change above.
5027 W3 is known to do that. */
5028 if (BUFFERP (p
->buffer
)
5029 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5030 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5032 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5034 update_mode_lines
++;
5036 /* Make sure opoint and the old restrictions
5037 float ahead of any new text just as point would. */
5038 if (opoint
>= before
)
5040 opoint
+= PT
- before
;
5041 opoint_byte
+= PT_BYTE
- before_byte
;
5043 if (old_begv
> before
)
5045 old_begv
+= PT
- before
;
5046 old_begv_byte
+= PT_BYTE
- before_byte
;
5048 if (old_zv
>= before
)
5050 old_zv
+= PT
- before
;
5051 old_zv_byte
+= PT_BYTE
- before_byte
;
5054 /* If the restriction isn't what it should be, set it. */
5055 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5056 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5058 /* Handling the process output should not deactivate the mark. */
5059 Vdeactivate_mark
= odeactivate
;
5061 current_buffer
->read_only
= old_read_only
;
5062 SET_PT_BOTH (opoint
, opoint_byte
);
5063 set_buffer_internal (old
);
5066 start_vms_process_read (vs
);
5071 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5073 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5074 This is intended for use by asynchronous process output filters and sentinels. */)
5077 return (waiting_for_user_input_p
? Qt
: Qnil
);
5080 /* Sending data to subprocess */
5082 jmp_buf send_process_frame
;
5083 Lisp_Object process_sent_to
;
5086 send_process_trap ()
5092 longjmp (send_process_frame
, 1);
5095 /* Send some data to process PROC.
5096 BUF is the beginning of the data; LEN is the number of characters.
5097 OBJECT is the Lisp object that the data comes from. If OBJECT is
5098 nil or t, it means that the data comes from C string.
5100 If OBJECT is not nil, the data is encoded by PROC's coding-system
5101 for encoding before it is sent.
5103 This function can evaluate Lisp code and can garbage collect. */
5106 send_process (proc
, buf
, len
, object
)
5107 volatile Lisp_Object proc
;
5108 unsigned char *volatile buf
;
5110 volatile Lisp_Object object
;
5112 /* Use volatile to protect variables from being clobbered by longjmp. */
5113 struct Lisp_Process
*p
= XPROCESS (proc
);
5115 struct coding_system
*coding
;
5116 struct gcpro gcpro1
;
5121 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5124 if (! NILP (p
->raw_status_low
))
5126 if (! EQ (p
->status
, Qrun
))
5127 error ("Process %s not running", SDATA (p
->name
));
5128 if (XINT (p
->outfd
) < 0)
5129 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5131 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5132 Vlast_coding_system_used
= coding
->symbol
;
5134 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5135 || (BUFFERP (object
)
5136 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5139 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5140 /* The coding system for encoding was changed to raw-text
5141 because we sent a unibyte text previously. Now we are
5142 sending a multibyte text, thus we must encode it by the
5143 original coding system specified for the current process. */
5144 setup_coding_system (p
->encode_coding_system
, coding
);
5145 /* src_multibyte should be set to 1 _after_ a call to
5146 setup_coding_system, since it resets src_multibyte to
5148 coding
->src_multibyte
= 1;
5152 /* For sending a unibyte text, character code conversion should
5153 not take place but EOL conversion should. So, setup raw-text
5154 or one of the subsidiary if we have not yet done it. */
5155 if (coding
->type
!= coding_type_raw_text
)
5157 if (CODING_REQUIRE_FLUSHING (coding
))
5159 /* But, before changing the coding, we must flush out data. */
5160 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5161 send_process (proc
, "", 0, Qt
);
5163 coding
->src_multibyte
= 0;
5164 setup_raw_text_coding_system (coding
);
5167 coding
->dst_multibyte
= 0;
5169 if (CODING_REQUIRE_ENCODING (coding
))
5171 int require
= encoding_buffer_size (coding
, len
);
5172 int from_byte
= -1, from
= -1, to
= -1;
5174 if (BUFFERP (object
))
5176 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5177 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5178 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5180 else if (STRINGP (object
))
5182 from_byte
= buf
- SDATA (object
);
5183 from
= string_byte_to_char (object
, from_byte
);
5184 to
= string_byte_to_char (object
, from_byte
+ len
);
5187 if (coding
->composing
!= COMPOSITION_DISABLED
)
5190 coding_save_composition (coding
, from
, to
, object
);
5192 coding
->composing
= COMPOSITION_DISABLED
;
5195 if (SBYTES (p
->encoding_buf
) < require
)
5196 p
->encoding_buf
= make_uninit_string (require
);
5199 buf
= (BUFFERP (object
)
5200 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5201 : SDATA (object
) + from_byte
);
5203 object
= p
->encoding_buf
;
5204 encode_coding (coding
, (char *) buf
, SDATA (object
),
5205 len
, SBYTES (object
));
5206 len
= coding
->produced
;
5207 buf
= SDATA (object
);
5211 vs
= get_vms_process_pointer (p
->pid
);
5213 error ("Could not find this process: %x", p
->pid
);
5214 else if (write_to_vms_process (vs
, buf
, len
))
5218 if (pty_max_bytes
== 0)
5220 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5221 pty_max_bytes
= fpathconf (XFASTINT (p
->outfd
), _PC_MAX_CANON
);
5222 if (pty_max_bytes
< 0)
5223 pty_max_bytes
= 250;
5225 pty_max_bytes
= 250;
5227 /* Deduct one, to leave space for the eof. */
5231 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5232 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5233 when returning with longjmp despite being declared volatile. */
5234 if (!setjmp (send_process_frame
))
5236 process_sent_to
= proc
;
5240 SIGTYPE (*old_sigpipe
)();
5242 /* Decide how much data we can send in one batch.
5243 Long lines need to be split into multiple batches. */
5244 if (!NILP (p
->pty_flag
))
5246 /* Starting this at zero is always correct when not the first
5247 iteration because the previous iteration ended by sending C-d.
5248 It may not be correct for the first iteration
5249 if a partial line was sent in a separate send_process call.
5250 If that proves worth handling, we need to save linepos
5251 in the process object. */
5253 unsigned char *ptr
= (unsigned char *) buf
;
5254 unsigned char *end
= (unsigned char *) buf
+ len
;
5256 /* Scan through this text for a line that is too long. */
5257 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5265 /* If we found one, break the line there
5266 and put in a C-d to force the buffer through. */
5270 /* Send this batch, using one or more write calls. */
5273 int outfd
= XINT (p
->outfd
);
5274 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5275 #ifdef DATAGRAM_SOCKETS
5276 if (DATAGRAM_CHAN_P (outfd
))
5278 rv
= sendto (outfd
, (char *) buf
, this,
5279 0, datagram_address
[outfd
].sa
,
5280 datagram_address
[outfd
].len
);
5281 if (rv
< 0 && errno
== EMSGSIZE
)
5282 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5287 rv
= emacs_write (outfd
, (char *) buf
, this);
5288 #ifdef ADAPTIVE_READ_BUFFERING
5289 if (XINT (p
->read_output_delay
) > 0
5290 && EQ (p
->adaptive_read_buffering
, Qt
))
5292 XSETFASTINT (p
->read_output_delay
, 0);
5293 process_output_delay_count
--;
5294 p
->read_output_skip
= Qnil
;
5298 signal (SIGPIPE
, old_sigpipe
);
5304 || errno
== EWOULDBLOCK
5310 /* Buffer is full. Wait, accepting input;
5311 that may allow the program
5312 to finish doing output and read more. */
5316 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5317 /* A gross hack to work around a bug in FreeBSD.
5318 In the following sequence, read(2) returns
5322 write(2) 954 bytes, get EAGAIN
5323 read(2) 1024 bytes in process_read_output
5324 read(2) 11 bytes in process_read_output
5326 That is, read(2) returns more bytes than have
5327 ever been written successfully. The 1033 bytes
5328 read are the 1022 bytes written successfully
5329 after processing (for example with CRs added if
5330 the terminal is set up that way which it is
5331 here). The same bytes will be seen again in a
5332 later read(2), without the CRs. */
5334 if (errno
== EAGAIN
)
5337 ioctl (XINT (p
->outfd
), TIOCFLUSH
, &flags
);
5339 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5341 /* Running filters might relocate buffers or strings.
5342 Arrange to relocate BUF. */
5343 if (BUFFERP (object
))
5344 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5345 else if (STRINGP (object
))
5346 offset
= buf
- SDATA (object
);
5348 #ifdef EMACS_HAS_USECS
5349 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5351 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5354 if (BUFFERP (object
))
5355 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5356 else if (STRINGP (object
))
5357 buf
= offset
+ SDATA (object
);
5362 /* This is a real error. */
5363 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5370 /* If we sent just part of the string, put in an EOF
5371 to force it through, before we send the rest. */
5373 Fprocess_send_eof (proc
);
5376 #endif /* not VMS */
5380 proc
= process_sent_to
;
5381 p
= XPROCESS (proc
);
5383 p
->raw_status_low
= Qnil
;
5384 p
->raw_status_high
= Qnil
;
5385 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5386 XSETINT (p
->tick
, ++process_tick
);
5387 deactivate_process (proc
);
5389 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5391 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5398 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5400 doc
: /* Send current contents of region as input to PROCESS.
5401 PROCESS may be a process, a buffer, the name of a process or buffer, or
5402 nil, indicating the current buffer's process.
5403 Called from program, takes three arguments, PROCESS, START and END.
5404 If the region is more than 500 characters long,
5405 it is sent in several bunches. This may happen even for shorter regions.
5406 Output from processes can arrive in between bunches. */)
5407 (process
, start
, end
)
5408 Lisp_Object process
, start
, end
;
5413 proc
= get_process (process
);
5414 validate_region (&start
, &end
);
5416 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5417 move_gap (XINT (start
));
5419 start1
= CHAR_TO_BYTE (XINT (start
));
5420 end1
= CHAR_TO_BYTE (XINT (end
));
5421 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
5422 Fcurrent_buffer ());
5427 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5429 doc
: /* Send PROCESS the contents of STRING as input.
5430 PROCESS may be a process, a buffer, the name of a process or buffer, or
5431 nil, indicating the current buffer's process.
5432 If STRING is more than 500 characters long,
5433 it is sent in several bunches. This may happen even for shorter strings.
5434 Output from processes can arrive in between bunches. */)
5436 Lisp_Object process
, string
;
5439 CHECK_STRING (string
);
5440 proc
= get_process (process
);
5441 send_process (proc
, SDATA (string
),
5442 SBYTES (string
), string
);
5446 /* Return the foreground process group for the tty/pty that
5447 the process P uses. */
5449 emacs_get_tty_pgrp (p
)
5450 struct Lisp_Process
*p
;
5455 if (ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5458 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5459 master side. Try the slave side. */
5460 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5464 ioctl (fd
, TIOCGPGRP
, &gid
);
5468 #endif /* defined (TIOCGPGRP ) */
5473 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5474 Sprocess_running_child_p
, 0, 1, 0,
5475 doc
: /* Return t if PROCESS has given the terminal to a child.
5476 If the operating system does not make it possible to find out,
5477 return t unconditionally. */)
5479 Lisp_Object process
;
5481 /* Initialize in case ioctl doesn't exist or gives an error,
5482 in a way that will cause returning t. */
5485 struct Lisp_Process
*p
;
5487 proc
= get_process (process
);
5488 p
= XPROCESS (proc
);
5490 if (!EQ (p
->childp
, Qt
))
5491 error ("Process %s is not a subprocess",
5493 if (XINT (p
->infd
) < 0)
5494 error ("Process %s is not active",
5497 gid
= emacs_get_tty_pgrp (p
);
5499 if (gid
== XFASTINT (p
->pid
))
5504 /* send a signal number SIGNO to PROCESS.
5505 If CURRENT_GROUP is t, that means send to the process group
5506 that currently owns the terminal being used to communicate with PROCESS.
5507 This is used for various commands in shell mode.
5508 If CURRENT_GROUP is lambda, that means send to the process group
5509 that currently owns the terminal, but only if it is NOT the shell itself.
5511 If NOMSG is zero, insert signal-announcements into process's buffers
5514 If we can, we try to signal PROCESS by sending control characters
5515 down the pty. This allows us to signal inferiors who have changed
5516 their uid, for which killpg would return an EPERM error. */
5519 process_send_signal (process
, signo
, current_group
, nomsg
)
5520 Lisp_Object process
;
5522 Lisp_Object current_group
;
5526 register struct Lisp_Process
*p
;
5530 proc
= get_process (process
);
5531 p
= XPROCESS (proc
);
5533 if (!EQ (p
->childp
, Qt
))
5534 error ("Process %s is not a subprocess",
5536 if (XINT (p
->infd
) < 0)
5537 error ("Process %s is not active",
5540 if (NILP (p
->pty_flag
))
5541 current_group
= Qnil
;
5543 /* If we are using pgrps, get a pgrp number and make it negative. */
5544 if (NILP (current_group
))
5545 /* Send the signal to the shell's process group. */
5546 gid
= XFASTINT (p
->pid
);
5549 #ifdef SIGNALS_VIA_CHARACTERS
5550 /* If possible, send signals to the entire pgrp
5551 by sending an input character to it. */
5553 /* TERMIOS is the latest and bestest, and seems most likely to
5554 work. If the system has it, use it. */
5557 cc_t
*sig_char
= NULL
;
5559 tcgetattr (XINT (p
->infd
), &t
);
5564 sig_char
= &t
.c_cc
[VINTR
];
5568 sig_char
= &t
.c_cc
[VQUIT
];
5572 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5573 sig_char
= &t
.c_cc
[VSWTCH
];
5575 sig_char
= &t
.c_cc
[VSUSP
];
5580 if (sig_char
&& *sig_char
!= CDISABLE
)
5582 send_process (proc
, sig_char
, 1, Qnil
);
5585 /* If we can't send the signal with a character,
5586 fall through and send it another way. */
5587 #else /* ! HAVE_TERMIOS */
5589 /* On Berkeley descendants, the following IOCTL's retrieve the
5590 current control characters. */
5591 #if defined (TIOCGLTC) && defined (TIOCGETC)
5599 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5600 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5603 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5604 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5608 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5609 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5611 #endif /* ! defined (SIGTSTP) */
5614 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5616 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5623 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5624 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5627 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5628 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5632 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5633 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5635 #endif /* ! defined (SIGTSTP) */
5637 #else /* ! defined (TCGETA) */
5638 Your configuration files are messed up
.
5639 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5640 you'd better be using one of the alternatives above! */
5641 #endif /* ! defined (TCGETA) */
5642 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5643 /* In this case, the code above should alway returns. */
5645 #endif /* ! defined HAVE_TERMIOS */
5647 /* The code above may fall through if it can't
5648 handle the signal. */
5649 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5652 /* Get the current pgrp using the tty itself, if we have that.
5653 Otherwise, use the pty to get the pgrp.
5654 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5655 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5656 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5657 His patch indicates that if TIOCGPGRP returns an error, then
5658 we should just assume that p->pid is also the process group id. */
5660 gid
= emacs_get_tty_pgrp (p
);
5663 /* If we can't get the information, assume
5664 the shell owns the tty. */
5665 gid
= XFASTINT (p
->pid
);
5667 /* It is not clear whether anything really can set GID to -1.
5668 Perhaps on some system one of those ioctls can or could do so.
5669 Or perhaps this is vestigial. */
5672 #else /* ! defined (TIOCGPGRP ) */
5673 /* Can't select pgrps on this system, so we know that
5674 the child itself heads the pgrp. */
5675 gid
= XFASTINT (p
->pid
);
5676 #endif /* ! defined (TIOCGPGRP ) */
5678 /* If current_group is lambda, and the shell owns the terminal,
5679 don't send any signal. */
5680 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5688 p
->raw_status_low
= Qnil
;
5689 p
->raw_status_high
= Qnil
;
5691 XSETINT (p
->tick
, ++process_tick
);
5695 #endif /* ! defined (SIGCONT) */
5698 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5703 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5708 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5711 flush_pending_output (XINT (p
->infd
));
5715 /* If we don't have process groups, send the signal to the immediate
5716 subprocess. That isn't really right, but it's better than any
5717 obvious alternative. */
5720 kill (XFASTINT (p
->pid
), signo
);
5724 /* gid may be a pid, or minus a pgrp's number */
5726 if (!NILP (current_group
))
5728 if (ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
) == -1)
5729 EMACS_KILLPG (gid
, signo
);
5733 gid
= - XFASTINT (p
->pid
);
5736 #else /* ! defined (TIOCSIGSEND) */
5737 EMACS_KILLPG (gid
, signo
);
5738 #endif /* ! defined (TIOCSIGSEND) */
5741 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5742 doc
: /* Interrupt process PROCESS.
5743 PROCESS may be a process, a buffer, or the name of a process or buffer.
5744 No arg or nil means current buffer's process.
5745 Second arg CURRENT-GROUP non-nil means send signal to
5746 the current process-group of the process's controlling terminal
5747 rather than to the process's own process group.
5748 If the process is a shell, this means interrupt current subjob
5749 rather than the shell.
5751 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5752 don't send the signal. */)
5753 (process
, current_group
)
5754 Lisp_Object process
, current_group
;
5756 process_send_signal (process
, SIGINT
, current_group
, 0);
5760 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5761 doc
: /* Kill process PROCESS. May be process or name of one.
5762 See function `interrupt-process' for more details on usage. */)
5763 (process
, current_group
)
5764 Lisp_Object process
, current_group
;
5766 process_send_signal (process
, SIGKILL
, current_group
, 0);
5770 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5771 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5772 See function `interrupt-process' for more details on usage. */)
5773 (process
, current_group
)
5774 Lisp_Object process
, current_group
;
5776 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5780 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5781 doc
: /* Stop process PROCESS. May be process or name of one.
5782 See function `interrupt-process' for more details on usage.
5783 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5784 (process
, current_group
)
5785 Lisp_Object process
, current_group
;
5788 if (PROCESSP (process
) && NETCONN_P (process
))
5790 struct Lisp_Process
*p
;
5792 p
= XPROCESS (process
);
5793 if (NILP (p
->command
)
5794 && XINT (p
->infd
) >= 0)
5796 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5797 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5804 error ("no SIGTSTP support");
5806 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5811 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5812 doc
: /* Continue process PROCESS. May be process or name of one.
5813 See function `interrupt-process' for more details on usage.
5814 If PROCESS is a network process, resume handling of incoming traffic. */)
5815 (process
, current_group
)
5816 Lisp_Object process
, current_group
;
5819 if (PROCESSP (process
) && NETCONN_P (process
))
5821 struct Lisp_Process
*p
;
5823 p
= XPROCESS (process
);
5824 if (EQ (p
->command
, Qt
)
5825 && XINT (p
->infd
) >= 0
5826 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5828 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5829 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5836 process_send_signal (process
, SIGCONT
, current_group
, 0);
5838 error ("no SIGCONT support");
5843 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5844 2, 2, "sProcess (name or number): \nnSignal code: ",
5845 doc
: /* Send PROCESS the signal with code SIGCODE.
5846 PROCESS may also be an integer specifying the process id of the
5847 process to signal; in this case, the process need not be a child of
5849 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5851 Lisp_Object process
, sigcode
;
5855 if (INTEGERP (process
))
5861 if (STRINGP (process
))
5864 if (tem
= Fget_process (process
), NILP (tem
))
5866 pid
= Fstring_to_number (process
, make_number (10));
5867 if (XINT (pid
) != 0)
5873 process
= get_process (process
);
5878 CHECK_PROCESS (process
);
5879 pid
= XPROCESS (process
)->pid
;
5880 if (!INTEGERP (pid
) || XINT (pid
) <= 0)
5881 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5885 #define handle_signal(NAME, VALUE) \
5886 else if (!strcmp (name, NAME)) \
5887 XSETINT (sigcode, VALUE)
5889 if (INTEGERP (sigcode
))
5893 unsigned char *name
;
5895 CHECK_SYMBOL (sigcode
);
5896 name
= SDATA (SYMBOL_NAME (sigcode
));
5901 handle_signal ("SIGHUP", SIGHUP
);
5904 handle_signal ("SIGINT", SIGINT
);
5907 handle_signal ("SIGQUIT", SIGQUIT
);
5910 handle_signal ("SIGILL", SIGILL
);
5913 handle_signal ("SIGABRT", SIGABRT
);
5916 handle_signal ("SIGEMT", SIGEMT
);
5919 handle_signal ("SIGKILL", SIGKILL
);
5922 handle_signal ("SIGFPE", SIGFPE
);
5925 handle_signal ("SIGBUS", SIGBUS
);
5928 handle_signal ("SIGSEGV", SIGSEGV
);
5931 handle_signal ("SIGSYS", SIGSYS
);
5934 handle_signal ("SIGPIPE", SIGPIPE
);
5937 handle_signal ("SIGALRM", SIGALRM
);
5940 handle_signal ("SIGTERM", SIGTERM
);
5943 handle_signal ("SIGURG", SIGURG
);
5946 handle_signal ("SIGSTOP", SIGSTOP
);
5949 handle_signal ("SIGTSTP", SIGTSTP
);
5952 handle_signal ("SIGCONT", SIGCONT
);
5955 handle_signal ("SIGCHLD", SIGCHLD
);
5958 handle_signal ("SIGTTIN", SIGTTIN
);
5961 handle_signal ("SIGTTOU", SIGTTOU
);
5964 handle_signal ("SIGIO", SIGIO
);
5967 handle_signal ("SIGXCPU", SIGXCPU
);
5970 handle_signal ("SIGXFSZ", SIGXFSZ
);
5973 handle_signal ("SIGVTALRM", SIGVTALRM
);
5976 handle_signal ("SIGPROF", SIGPROF
);
5979 handle_signal ("SIGWINCH", SIGWINCH
);
5982 handle_signal ("SIGINFO", SIGINFO
);
5985 handle_signal ("SIGUSR1", SIGUSR1
);
5988 handle_signal ("SIGUSR2", SIGUSR2
);
5991 error ("Undefined signal name %s", name
);
5994 #undef handle_signal
5996 return make_number (kill (XINT (pid
), XINT (sigcode
)));
5999 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6000 doc
: /* Make PROCESS see end-of-file in its input.
6001 EOF comes after any text already sent to it.
6002 PROCESS may be a process, a buffer, the name of a process or buffer, or
6003 nil, indicating the current buffer's process.
6004 If PROCESS is a network connection, or is a process communicating
6005 through a pipe (as opposed to a pty), then you cannot send any more
6006 text to PROCESS after you call this function. */)
6008 Lisp_Object process
;
6011 struct coding_system
*coding
;
6013 if (DATAGRAM_CONN_P (process
))
6016 proc
= get_process (process
);
6017 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
6019 /* Make sure the process is really alive. */
6020 if (! NILP (XPROCESS (proc
)->raw_status_low
))
6021 update_status (XPROCESS (proc
));
6022 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6023 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6025 if (CODING_REQUIRE_FLUSHING (coding
))
6027 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6028 send_process (proc
, "", 0, Qnil
);
6032 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6034 if (!NILP (XPROCESS (proc
)->pty_flag
))
6035 send_process (proc
, "\004", 1, Qnil
);
6038 int old_outfd
, new_outfd
;
6040 #ifdef HAVE_SHUTDOWN
6041 /* If this is a network connection, or socketpair is used
6042 for communication with the subprocess, call shutdown to cause EOF.
6043 (In some old system, shutdown to socketpair doesn't work.
6044 Then we just can't win.) */
6045 if (NILP (XPROCESS (proc
)->pid
)
6046 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
6047 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
6048 /* In case of socketpair, outfd == infd, so don't close it. */
6049 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
6050 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6051 #else /* not HAVE_SHUTDOWN */
6052 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6053 #endif /* not HAVE_SHUTDOWN */
6054 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6055 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
6057 if (!proc_encode_coding_system
[new_outfd
])
6058 proc_encode_coding_system
[new_outfd
]
6059 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6060 bcopy (proc_encode_coding_system
[old_outfd
],
6061 proc_encode_coding_system
[new_outfd
],
6062 sizeof (struct coding_system
));
6063 bzero (proc_encode_coding_system
[old_outfd
],
6064 sizeof (struct coding_system
));
6066 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
6072 /* Kill all processes associated with `buffer'.
6073 If `buffer' is nil, kill all processes */
6076 kill_buffer_processes (buffer
)
6079 Lisp_Object tail
, proc
;
6081 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6083 proc
= XCDR (XCAR (tail
));
6084 if (GC_PROCESSP (proc
)
6085 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6087 if (NETCONN_P (proc
))
6088 Fdelete_process (proc
);
6089 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
6090 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6095 /* On receipt of a signal that a child status has changed, loop asking
6096 about children with changed statuses until the system says there
6099 All we do is change the status; we do not run sentinels or print
6100 notifications. That is saved for the next time keyboard input is
6101 done, in order to avoid timing errors.
6103 ** WARNING: this can be called during garbage collection.
6104 Therefore, it must not be fooled by the presence of mark bits in
6107 ** USG WARNING: Although it is not obvious from the documentation
6108 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6109 signal() before executing at least one wait(), otherwise the
6110 handler will be called again, resulting in an infinite loop. The
6111 relevant portion of the documentation reads "SIGCLD signals will be
6112 queued and the signal-catching function will be continually
6113 reentered until the queue is empty". Invoking signal() causes the
6114 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6117 ** Malloc WARNING: This should never call malloc either directly or
6118 indirectly; if it does, that is a bug */
6121 sigchld_handler (signo
)
6124 int old_errno
= errno
;
6126 register struct Lisp_Process
*p
;
6127 extern EMACS_TIME
*input_available_clear_time
;
6131 sigheld
|= sigbit (SIGCHLD
);
6143 #endif /* no WUNTRACED */
6144 /* Keep trying to get a status until we get a definitive result. */
6148 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6150 while (pid
< 0 && errno
== EINTR
);
6154 /* PID == 0 means no processes found, PID == -1 means a real
6155 failure. We have done all our job, so return. */
6157 /* USG systems forget handlers when they are used;
6158 must reestablish each time */
6159 #if defined (USG) && !defined (POSIX_SIGNALS)
6160 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6163 sigheld
&= ~sigbit (SIGCHLD
);
6171 #endif /* no WNOHANG */
6173 /* Find the process that signaled us, and record its status. */
6176 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6178 proc
= XCDR (XCAR (tail
));
6179 p
= XPROCESS (proc
);
6180 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
6185 /* Look for an asynchronous process whose pid hasn't been filled
6188 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6190 proc
= XCDR (XCAR (tail
));
6191 p
= XPROCESS (proc
);
6192 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
6197 /* Change the status of the process that was found. */
6200 union { int i
; WAITTYPE wt
; } u
;
6201 int clear_desc_flag
= 0;
6203 XSETINT (p
->tick
, ++process_tick
);
6205 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
6206 XSETINT (p
->raw_status_high
, u
.i
>> 16);
6208 /* If process has terminated, stop waiting for its output. */
6209 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6210 && XINT (p
->infd
) >= 0)
6211 clear_desc_flag
= 1;
6213 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6214 if (clear_desc_flag
)
6216 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6217 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6220 /* Tell wait_reading_process_output that it needs to wake up and
6222 if (input_available_clear_time
)
6223 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6226 /* There was no asynchronous process found for that id. Check
6227 if we have a synchronous process. */
6230 synch_process_alive
= 0;
6232 /* Report the status of the synchronous process. */
6234 synch_process_retcode
= WRETCODE (w
);
6235 else if (WIFSIGNALED (w
))
6236 synch_process_termsig
= WTERMSIG (w
);
6238 /* Tell wait_reading_process_output that it needs to wake up and
6240 if (input_available_clear_time
)
6241 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6244 /* On some systems, we must return right away.
6245 If any more processes want to signal us, we will
6247 Otherwise (on systems that have WNOHANG), loop around
6248 to use up all the processes that have something to tell us. */
6249 #if (defined WINDOWSNT \
6250 || (defined USG && !defined GNU_LINUX \
6251 && !(defined HPUX && defined WNOHANG)))
6252 #if defined (USG) && ! defined (POSIX_SIGNALS)
6253 signal (signo
, sigchld_handler
);
6257 #endif /* USG, but not HPUX with WNOHANG */
6263 exec_sentinel_unwind (data
)
6266 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6271 exec_sentinel_error_handler (error
)
6274 cmd_error_internal (error
, "error in process sentinel: ");
6276 update_echo_area ();
6277 Fsleep_for (make_number (2), Qnil
);
6282 exec_sentinel (proc
, reason
)
6283 Lisp_Object proc
, reason
;
6285 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6286 register struct Lisp_Process
*p
= XPROCESS (proc
);
6287 int count
= SPECPDL_INDEX ();
6288 int outer_running_asynch_code
= running_asynch_code
;
6289 int waiting
= waiting_for_user_input_p
;
6291 /* No need to gcpro these, because all we do with them later
6292 is test them for EQness, and none of them should be a string. */
6293 odeactivate
= Vdeactivate_mark
;
6294 XSETBUFFER (obuffer
, current_buffer
);
6295 okeymap
= current_buffer
->keymap
;
6297 sentinel
= p
->sentinel
;
6298 if (NILP (sentinel
))
6301 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6302 assure that it gets restored no matter how the sentinel exits. */
6304 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6305 /* Inhibit quit so that random quits don't screw up a running filter. */
6306 specbind (Qinhibit_quit
, Qt
);
6307 specbind (Qlast_nonmenu_event
, Qt
);
6309 /* In case we get recursively called,
6310 and we already saved the match data nonrecursively,
6311 save the same match data in safely recursive fashion. */
6312 if (outer_running_asynch_code
)
6315 tem
= Fmatch_data (Qnil
, Qnil
);
6316 restore_match_data ();
6317 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
6318 Fset_match_data (tem
);
6321 /* For speed, if a search happens within this code,
6322 save the match data in a special nonrecursive fashion. */
6323 running_asynch_code
= 1;
6325 internal_condition_case_1 (read_process_output_call
,
6327 Fcons (proc
, Fcons (reason
, Qnil
))),
6328 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6329 exec_sentinel_error_handler
);
6331 /* If we saved the match data nonrecursively, restore it now. */
6332 restore_match_data ();
6333 running_asynch_code
= outer_running_asynch_code
;
6335 Vdeactivate_mark
= odeactivate
;
6337 /* Restore waiting_for_user_input_p as it was
6338 when we were called, in case the filter clobbered it. */
6339 waiting_for_user_input_p
= waiting
;
6342 if (! EQ (Fcurrent_buffer (), obuffer
)
6343 || ! EQ (current_buffer
->keymap
, okeymap
))
6345 /* But do it only if the caller is actually going to read events.
6346 Otherwise there's no need to make him wake up, and it could
6347 cause trouble (for example it would make Fsit_for return). */
6348 if (waiting_for_user_input_p
== -1)
6349 record_asynch_buffer_change ();
6351 unbind_to (count
, Qnil
);
6354 /* Report all recent events of a change in process status
6355 (either run the sentinel or output a message).
6356 This is usually done while Emacs is waiting for keyboard input
6357 but can be done at other times. */
6362 register Lisp_Object proc
, buffer
;
6363 Lisp_Object tail
, msg
;
6364 struct gcpro gcpro1
, gcpro2
;
6368 /* We need to gcpro tail; if read_process_output calls a filter
6369 which deletes a process and removes the cons to which tail points
6370 from Vprocess_alist, and then causes a GC, tail is an unprotected
6374 /* Set this now, so that if new processes are created by sentinels
6375 that we run, we get called again to handle their status changes. */
6376 update_tick
= process_tick
;
6378 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6381 register struct Lisp_Process
*p
;
6383 proc
= Fcdr (Fcar (tail
));
6384 p
= XPROCESS (proc
);
6386 if (XINT (p
->tick
) != XINT (p
->update_tick
))
6388 XSETINT (p
->update_tick
, XINT (p
->tick
));
6390 /* If process is still active, read any output that remains. */
6391 while (! EQ (p
->filter
, Qt
)
6392 && ! EQ (p
->status
, Qconnect
)
6393 && ! EQ (p
->status
, Qlisten
)
6394 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6395 && XINT (p
->infd
) >= 0
6396 && read_process_output (proc
, XINT (p
->infd
)) > 0);
6400 /* Get the text to use for the message. */
6401 if (!NILP (p
->raw_status_low
))
6403 msg
= status_message (p
);
6405 /* If process is terminated, deactivate it or delete it. */
6407 if (CONSP (p
->status
))
6408 symbol
= XCAR (p
->status
);
6410 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6411 || EQ (symbol
, Qclosed
))
6413 if (delete_exited_processes
)
6414 remove_process (proc
);
6416 deactivate_process (proc
);
6419 /* The actions above may have further incremented p->tick.
6420 So set p->update_tick again
6421 so that an error in the sentinel will not cause
6422 this code to be run again. */
6423 XSETINT (p
->update_tick
, XINT (p
->tick
));
6424 /* Now output the message suitably. */
6425 if (!NILP (p
->sentinel
))
6426 exec_sentinel (proc
, msg
);
6427 /* Don't bother with a message in the buffer
6428 when a process becomes runnable. */
6429 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6431 Lisp_Object ro
, tem
;
6432 struct buffer
*old
= current_buffer
;
6433 int opoint
, opoint_byte
;
6434 int before
, before_byte
;
6436 ro
= XBUFFER (buffer
)->read_only
;
6438 /* Avoid error if buffer is deleted
6439 (probably that's why the process is dead, too) */
6440 if (NILP (XBUFFER (buffer
)->name
))
6442 Fset_buffer (buffer
);
6445 opoint_byte
= PT_BYTE
;
6446 /* Insert new output into buffer
6447 at the current end-of-output marker,
6448 thus preserving logical ordering of input and output. */
6449 if (XMARKER (p
->mark
)->buffer
)
6450 Fgoto_char (p
->mark
);
6452 SET_PT_BOTH (ZV
, ZV_BYTE
);
6455 before_byte
= PT_BYTE
;
6457 tem
= current_buffer
->read_only
;
6458 current_buffer
->read_only
= Qnil
;
6459 insert_string ("\nProcess ");
6460 Finsert (1, &p
->name
);
6461 insert_string (" ");
6463 current_buffer
->read_only
= tem
;
6464 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6466 if (opoint
>= before
)
6467 SET_PT_BOTH (opoint
+ (PT
- before
),
6468 opoint_byte
+ (PT_BYTE
- before_byte
));
6470 SET_PT_BOTH (opoint
, opoint_byte
);
6472 set_buffer_internal (old
);
6477 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6478 redisplay_preserve_echo_area (13);
6484 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6485 Sset_process_coding_system
, 1, 3, 0,
6486 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6487 DECODING will be used to decode subprocess output and ENCODING to
6488 encode subprocess input. */)
6489 (process
, decoding
, encoding
)
6490 register Lisp_Object process
, decoding
, encoding
;
6492 register struct Lisp_Process
*p
;
6494 CHECK_PROCESS (process
);
6495 p
= XPROCESS (process
);
6496 if (XINT (p
->infd
) < 0)
6497 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6498 if (XINT (p
->outfd
) < 0)
6499 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6500 Fcheck_coding_system (decoding
);
6501 Fcheck_coding_system (encoding
);
6503 p
->decode_coding_system
= decoding
;
6504 p
->encode_coding_system
= encoding
;
6505 setup_process_coding_systems (process
);
6510 DEFUN ("process-coding-system",
6511 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6512 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6514 register Lisp_Object process
;
6516 CHECK_PROCESS (process
);
6517 return Fcons (XPROCESS (process
)->decode_coding_system
,
6518 XPROCESS (process
)->encode_coding_system
);
6521 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6522 Sset_process_filter_multibyte
, 2, 2, 0,
6523 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6524 If FLAG is non-nil, the filter is given multibyte strings.
6525 If FLAG is nil, the filter is given unibyte strings. In this case,
6526 all character code conversion except for end-of-line conversion is
6529 Lisp_Object process
, flag
;
6531 register struct Lisp_Process
*p
;
6533 CHECK_PROCESS (process
);
6534 p
= XPROCESS (process
);
6535 p
->filter_multibyte
= flag
;
6536 setup_process_coding_systems (process
);
6541 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6542 Sprocess_filter_multibyte_p
, 1, 1, 0,
6543 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6545 Lisp_Object process
;
6547 register struct Lisp_Process
*p
;
6549 CHECK_PROCESS (process
);
6550 p
= XPROCESS (process
);
6552 return (NILP (p
->filter_multibyte
) ? Qnil
: Qt
);
6557 /* The first time this is called, assume keyboard input comes from DESC
6558 instead of from where we used to expect it.
6559 Subsequent calls mean assume input keyboard can come from DESC
6560 in addition to other places. */
6562 static int add_keyboard_wait_descriptor_called_flag
;
6565 add_keyboard_wait_descriptor (desc
)
6568 if (! add_keyboard_wait_descriptor_called_flag
)
6569 FD_CLR (0, &input_wait_mask
);
6570 add_keyboard_wait_descriptor_called_flag
= 1;
6571 FD_SET (desc
, &input_wait_mask
);
6572 FD_SET (desc
, &non_process_wait_mask
);
6573 if (desc
> max_keyboard_desc
)
6574 max_keyboard_desc
= desc
;
6577 /* From now on, do not expect DESC to give keyboard input. */
6580 delete_keyboard_wait_descriptor (desc
)
6584 int lim
= max_keyboard_desc
;
6586 FD_CLR (desc
, &input_wait_mask
);
6587 FD_CLR (desc
, &non_process_wait_mask
);
6589 if (desc
== max_keyboard_desc
)
6590 for (fd
= 0; fd
< lim
; fd
++)
6591 if (FD_ISSET (fd
, &input_wait_mask
)
6592 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6593 max_keyboard_desc
= fd
;
6596 /* Return nonzero if *MASK has a bit set
6597 that corresponds to one of the keyboard input descriptors. */
6600 keyboard_bit_set (mask
)
6605 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6606 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6607 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6620 if (! noninteractive
|| initialized
)
6622 signal (SIGCHLD
, sigchld_handler
);
6625 FD_ZERO (&input_wait_mask
);
6626 FD_ZERO (&non_keyboard_wait_mask
);
6627 FD_ZERO (&non_process_wait_mask
);
6628 max_process_desc
= 0;
6630 #ifdef ADAPTIVE_READ_BUFFERING
6631 process_output_delay_count
= 0;
6632 process_output_skip
= 0;
6635 FD_SET (0, &input_wait_mask
);
6637 Vprocess_alist
= Qnil
;
6638 for (i
= 0; i
< MAXDESC
; i
++)
6640 chan_process
[i
] = Qnil
;
6641 proc_buffered_char
[i
] = -1;
6643 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6644 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6645 #ifdef DATAGRAM_SOCKETS
6646 bzero (datagram_address
, sizeof datagram_address
);
6651 Lisp_Object subfeatures
= Qnil
;
6652 struct socket_options
*sopt
;
6654 #define ADD_SUBFEATURE(key, val) \
6655 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6657 #ifdef NON_BLOCKING_CONNECT
6658 ADD_SUBFEATURE (QCnowait
, Qt
);
6660 #ifdef DATAGRAM_SOCKETS
6661 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6663 #ifdef HAVE_LOCAL_SOCKETS
6664 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6666 #ifdef HAVE_GETSOCKNAME
6667 ADD_SUBFEATURE (QCservice
, Qt
);
6669 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6670 ADD_SUBFEATURE (QCserver
, Qt
);
6673 for (sopt
= socket_options
; sopt
->name
; sopt
++)
6674 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
6676 Fprovide (intern ("make-network-process"), subfeatures
);
6678 #endif /* HAVE_SOCKETS */
6684 Qprocessp
= intern ("processp");
6685 staticpro (&Qprocessp
);
6686 Qrun
= intern ("run");
6688 Qstop
= intern ("stop");
6690 Qsignal
= intern ("signal");
6691 staticpro (&Qsignal
);
6693 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6696 Qexit = intern ("exit");
6697 staticpro (&Qexit); */
6699 Qopen
= intern ("open");
6701 Qclosed
= intern ("closed");
6702 staticpro (&Qclosed
);
6703 Qconnect
= intern ("connect");
6704 staticpro (&Qconnect
);
6705 Qfailed
= intern ("failed");
6706 staticpro (&Qfailed
);
6707 Qlisten
= intern ("listen");
6708 staticpro (&Qlisten
);
6709 Qlocal
= intern ("local");
6710 staticpro (&Qlocal
);
6711 Qdatagram
= intern ("datagram");
6712 staticpro (&Qdatagram
);
6714 QCname
= intern (":name");
6715 staticpro (&QCname
);
6716 QCbuffer
= intern (":buffer");
6717 staticpro (&QCbuffer
);
6718 QChost
= intern (":host");
6719 staticpro (&QChost
);
6720 QCservice
= intern (":service");
6721 staticpro (&QCservice
);
6722 QCtype
= intern (":type");
6723 staticpro (&QCtype
);
6724 QClocal
= intern (":local");
6725 staticpro (&QClocal
);
6726 QCremote
= intern (":remote");
6727 staticpro (&QCremote
);
6728 QCcoding
= intern (":coding");
6729 staticpro (&QCcoding
);
6730 QCserver
= intern (":server");
6731 staticpro (&QCserver
);
6732 QCnowait
= intern (":nowait");
6733 staticpro (&QCnowait
);
6734 QCsentinel
= intern (":sentinel");
6735 staticpro (&QCsentinel
);
6736 QClog
= intern (":log");
6738 QCnoquery
= intern (":noquery");
6739 staticpro (&QCnoquery
);
6740 QCstop
= intern (":stop");
6741 staticpro (&QCstop
);
6742 QCoptions
= intern (":options");
6743 staticpro (&QCoptions
);
6744 QCplist
= intern (":plist");
6745 staticpro (&QCplist
);
6746 QCfilter_multibyte
= intern (":filter-multibyte");
6747 staticpro (&QCfilter_multibyte
);
6749 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6750 staticpro (&Qlast_nonmenu_event
);
6752 staticpro (&Vprocess_alist
);
6754 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6755 doc
: /* *Non-nil means delete processes immediately when they exit.
6756 nil means don't delete them until `list-processes' is run. */);
6758 delete_exited_processes
= 1;
6760 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6761 doc
: /* Control type of device used to communicate with subprocesses.
6762 Values are nil to use a pipe, or t or `pty' to use a pty.
6763 The value has no effect if the system has no ptys or if all ptys are busy:
6764 then a pipe is used in any case.
6765 The value takes effect when `start-process' is called. */);
6766 Vprocess_connection_type
= Qt
;
6768 #ifdef ADAPTIVE_READ_BUFFERING
6769 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
6770 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
6771 On some systems, when Emacs reads the output from a subprocess, the output data
6772 is read in very small blocks, potentially resulting in very poor performance.
6773 This behaviour can be remedied to some extent by setting this variable to a
6774 non-nil value, as it will automatically delay reading from such processes, to
6775 allowing them to produce more output before Emacs tries to read it.
6776 If the value is t, the delay is reset after each write to the process; any other
6777 non-nil value means that the delay is not reset on write.
6778 The variable takes effect when `start-process' is called. */);
6779 Vprocess_adaptive_read_buffering
= Qt
;
6782 defsubr (&Sprocessp
);
6783 defsubr (&Sget_process
);
6784 defsubr (&Sget_buffer_process
);
6785 defsubr (&Sdelete_process
);
6786 defsubr (&Sprocess_status
);
6787 defsubr (&Sprocess_exit_status
);
6788 defsubr (&Sprocess_id
);
6789 defsubr (&Sprocess_name
);
6790 defsubr (&Sprocess_tty_name
);
6791 defsubr (&Sprocess_command
);
6792 defsubr (&Sset_process_buffer
);
6793 defsubr (&Sprocess_buffer
);
6794 defsubr (&Sprocess_mark
);
6795 defsubr (&Sset_process_filter
);
6796 defsubr (&Sprocess_filter
);
6797 defsubr (&Sset_process_sentinel
);
6798 defsubr (&Sprocess_sentinel
);
6799 defsubr (&Sset_process_window_size
);
6800 defsubr (&Sset_process_inherit_coding_system_flag
);
6801 defsubr (&Sprocess_inherit_coding_system_flag
);
6802 defsubr (&Sset_process_query_on_exit_flag
);
6803 defsubr (&Sprocess_query_on_exit_flag
);
6804 defsubr (&Sprocess_contact
);
6805 defsubr (&Sprocess_plist
);
6806 defsubr (&Sset_process_plist
);
6807 defsubr (&Slist_processes
);
6808 defsubr (&Sprocess_list
);
6809 defsubr (&Sstart_process
);
6811 defsubr (&Sset_network_process_option
);
6812 defsubr (&Smake_network_process
);
6813 defsubr (&Sformat_network_address
);
6814 #endif /* HAVE_SOCKETS */
6815 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
6817 defsubr (&Snetwork_interface_list
);
6819 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
6820 defsubr (&Snetwork_interface_info
);
6822 #endif /* HAVE_SOCKETS ... */
6823 #ifdef DATAGRAM_SOCKETS
6824 defsubr (&Sprocess_datagram_address
);
6825 defsubr (&Sset_process_datagram_address
);
6827 defsubr (&Saccept_process_output
);
6828 defsubr (&Sprocess_send_region
);
6829 defsubr (&Sprocess_send_string
);
6830 defsubr (&Sinterrupt_process
);
6831 defsubr (&Skill_process
);
6832 defsubr (&Squit_process
);
6833 defsubr (&Sstop_process
);
6834 defsubr (&Scontinue_process
);
6835 defsubr (&Sprocess_running_child_p
);
6836 defsubr (&Sprocess_send_eof
);
6837 defsubr (&Ssignal_process
);
6838 defsubr (&Swaiting_for_user_input_p
);
6839 /* defsubr (&Sprocess_connection); */
6840 defsubr (&Sset_process_coding_system
);
6841 defsubr (&Sprocess_coding_system
);
6842 defsubr (&Sset_process_filter_multibyte
);
6843 defsubr (&Sprocess_filter_multibyte_p
);
6847 #else /* not subprocesses */
6849 #include <sys/types.h>
6853 #include "systime.h"
6854 #include "charset.h"
6856 #include "termopts.h"
6857 #include "sysselect.h"
6859 extern int frame_garbaged
;
6861 extern EMACS_TIME
timer_check ();
6862 extern int timers_run
;
6866 /* As described above, except assuming that there are no subprocesses:
6868 Wait for timeout to elapse and/or keyboard input to be available.
6871 timeout in seconds, or
6872 zero for no limit, or
6873 -1 means gobble data immediately available but don't wait for any.
6875 read_kbd is a Lisp_Object:
6876 0 to ignore keyboard input, or
6877 1 to return when input is available, or
6878 -1 means caller will actually read the input, so don't throw to
6881 see full version for other parameters. We know that wait_proc will
6882 always be NULL, since `subprocesses' isn't defined.
6884 do_display != 0 means redisplay should be done to show subprocess
6885 output that arrives.
6887 Return true iff we received input from any process. */
6890 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
6891 wait_for_cell
, wait_proc
, just_wait_proc
)
6892 int time_limit
, microsecs
, read_kbd
, do_display
;
6893 Lisp_Object wait_for_cell
;
6894 struct Lisp_Process
*wait_proc
;
6898 EMACS_TIME end_time
, timeout
;
6899 SELECT_TYPE waitchannels
;
6902 /* What does time_limit really mean? */
6903 if (time_limit
|| microsecs
)
6905 EMACS_GET_TIME (end_time
);
6906 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6907 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6910 /* Turn off periodic alarms (in case they are in use)
6911 and then turn off any other atimers,
6912 because the select emulator uses alarms. */
6914 turn_on_atimers (0);
6918 int timeout_reduced_for_timers
= 0;
6920 /* If calling from keyboard input, do not quit
6921 since we want to return C-g as an input character.
6922 Otherwise, do pending quit if requested. */
6926 /* Exit now if the cell we're waiting for became non-nil. */
6927 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6930 /* Compute time from now till when time limit is up */
6931 /* Exit if already run out */
6932 if (time_limit
== -1)
6934 /* -1 specified for timeout means
6935 gobble output available now
6936 but don't wait at all. */
6938 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6940 else if (time_limit
|| microsecs
)
6942 EMACS_GET_TIME (timeout
);
6943 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6944 if (EMACS_TIME_NEG_P (timeout
))
6949 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6952 /* If our caller will not immediately handle keyboard events,
6953 run timer events directly.
6954 (Callers that will immediately read keyboard events
6955 call timer_delay on their own.) */
6956 if (NILP (wait_for_cell
))
6958 EMACS_TIME timer_delay
;
6962 int old_timers_run
= timers_run
;
6963 timer_delay
= timer_check (1);
6964 if (timers_run
!= old_timers_run
&& do_display
)
6965 /* We must retry, since a timer may have requeued itself
6966 and that could alter the time delay. */
6967 redisplay_preserve_echo_area (14);
6971 while (!detect_input_pending ());
6973 /* If there is unread keyboard input, also return. */
6975 && requeued_events_pending_p ())
6978 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6980 EMACS_TIME difference
;
6981 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6982 if (EMACS_TIME_NEG_P (difference
))
6984 timeout
= timer_delay
;
6985 timeout_reduced_for_timers
= 1;
6990 /* Cause C-g and alarm signals to take immediate action,
6991 and cause input available signals to zero out timeout. */
6993 set_waiting_for_input (&timeout
);
6995 /* Wait till there is something to do. */
6997 if (! read_kbd
&& NILP (wait_for_cell
))
6998 FD_ZERO (&waitchannels
);
7000 FD_SET (0, &waitchannels
);
7002 /* If a frame has been newly mapped and needs updating,
7003 reprocess its display stuff. */
7004 if (frame_garbaged
&& do_display
)
7006 clear_waiting_for_input ();
7007 redisplay_preserve_echo_area (15);
7009 set_waiting_for_input (&timeout
);
7012 if (read_kbd
&& detect_input_pending ())
7015 FD_ZERO (&waitchannels
);
7018 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7023 /* Make C-g and alarm signals set flags again */
7024 clear_waiting_for_input ();
7026 /* If we woke up due to SIGWINCH, actually change size now. */
7027 do_pending_window_change (0);
7029 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7030 /* We waited the full specified time, so return now. */
7035 /* If the system call was interrupted, then go around the
7037 if (xerrno
== EINTR
)
7038 FD_ZERO (&waitchannels
);
7040 error ("select error: %s", emacs_strerror (xerrno
));
7043 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7044 /* System sometimes fails to deliver SIGIO. */
7045 kill (getpid (), SIGIO
);
7048 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7049 kill (getpid (), SIGIO
);
7052 /* Check for keyboard input */
7055 && detect_input_pending_run_timers (do_display
))
7057 swallow_events (do_display
);
7058 if (detect_input_pending_run_timers (do_display
))
7062 /* If there is unread keyboard input, also return. */
7064 && requeued_events_pending_p ())
7067 /* If wait_for_cell. check for keyboard input
7068 but don't run any timers.
7069 ??? (It seems wrong to me to check for keyboard
7070 input at all when wait_for_cell, but the code
7071 has been this way since July 1994.
7072 Try changing this after version 19.31.) */
7073 if (! NILP (wait_for_cell
)
7074 && detect_input_pending ())
7076 swallow_events (do_display
);
7077 if (detect_input_pending ())
7081 /* Exit now if the cell we're waiting for became non-nil. */
7082 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7092 /* Don't confuse make-docfile by having two doc strings for this function.
7093 make-docfile does not pay attention to #if, for good reason! */
7094 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7097 register Lisp_Object name
;
7102 /* Don't confuse make-docfile by having two doc strings for this function.
7103 make-docfile does not pay attention to #if, for good reason! */
7104 DEFUN ("process-inherit-coding-system-flag",
7105 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7109 register Lisp_Object process
;
7111 /* Ignore the argument and return the value of
7112 inherit-process-coding-system. */
7113 return inherit_process_coding_system
? Qt
: Qnil
;
7116 /* Kill all processes associated with `buffer'.
7117 If `buffer' is nil, kill all processes.
7118 Since we have no subprocesses, this does nothing. */
7121 kill_buffer_processes (buffer
)
7134 QCtype
= intern (":type");
7135 staticpro (&QCtype
);
7137 defsubr (&Sget_buffer_process
);
7138 defsubr (&Sprocess_inherit_coding_system_flag
);
7142 #endif /* not subprocesses */
7144 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7145 (do not change this comment) */