1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2011
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
37 /* Only MS-DOS does not define `subprocesses'. */
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
45 /* Are local (unix) sockets supported? */
46 #if defined (HAVE_SYS_UN_H)
47 #if !defined (AF_LOCAL) && defined (AF_UNIX)
48 #define AF_LOCAL AF_UNIX
51 #define HAVE_LOCAL_SOCKETS
56 #include <sys/ioctl.h>
57 #if defined(HAVE_NET_IF_H)
59 #endif /* HAVE_NET_IF_H */
66 #include <netinet/in.h>
67 #include <arpa/nameser.h>
79 #endif /* subprocesses */
86 #include "character.h"
90 #include "termhooks.h"
94 #include "blockinput.h"
95 #include "dispextern.h"
96 #include "composite.h"
98 #include "sysselect.h"
99 #include "syssignal.h"
105 #if defined (USE_GTK) || defined (HAVE_GCONF)
106 #include "xgselect.h"
107 #endif /* defined (USE_GTK) || defined (HAVE_GCONF) */
112 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
113 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
114 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
115 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
116 Lisp_Object QCname
, QCtype
;
118 /* Non-zero if keyboard input is on hold, zero otherwise. */
120 static int kbd_is_on_hold
;
122 /* Nonzero means don't run process sentinels. This is used
124 int inhibit_sentinels
;
128 Lisp_Object Qprocessp
;
129 static Lisp_Object Qrun
, Qstop
, Qsignal
;
130 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
132 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
133 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
135 static Lisp_Object Qipv6
;
137 static Lisp_Object QCport
, QCprocess
;
139 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
140 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
141 static Lisp_Object QCbuffer
, QChost
, QCservice
;
142 static Lisp_Object QClocal
, QCremote
, QCcoding
;
143 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
144 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
145 static Lisp_Object Qlast_nonmenu_event
;
146 /* QCfamily is declared and initialized in xfaces.c,
147 QCfilter in keyboard.c. */
148 extern Lisp_Object QCfamily
, QCfilter
;
150 /* Qexit is declared and initialized in eval.c. */
152 /* QCfamily is defined in xfaces.c. */
153 extern Lisp_Object QCfamily
;
154 /* QCfilter is defined in keyboard.c. */
155 extern Lisp_Object QCfilter
;
157 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
158 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
159 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
160 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
166 /* Number of events of change of status of a process. */
167 static int process_tick
;
168 /* Number of events for which the user or sentinel has been notified. */
169 static int update_tick
;
171 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
173 /* Only W32 has this, it really means that select can't take write mask. */
174 #ifdef BROKEN_NON_BLOCKING_CONNECT
175 #undef NON_BLOCKING_CONNECT
176 #define SELECT_CANT_DO_WRITE_MASK
178 #ifndef NON_BLOCKING_CONNECT
180 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
181 #if defined (O_NONBLOCK) || defined (O_NDELAY)
182 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
183 #define NON_BLOCKING_CONNECT
184 #endif /* EWOULDBLOCK || EINPROGRESS */
185 #endif /* O_NONBLOCK || O_NDELAY */
186 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
187 #endif /* HAVE_SELECT */
188 #endif /* NON_BLOCKING_CONNECT */
189 #endif /* BROKEN_NON_BLOCKING_CONNECT */
191 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
192 this system. We need to read full packets, so we need a
193 "non-destructive" select. So we require either native select,
194 or emulation of select using FIONREAD. */
196 #ifdef BROKEN_DATAGRAM_SOCKETS
197 #undef DATAGRAM_SOCKETS
199 #ifndef DATAGRAM_SOCKETS
200 #if defined (HAVE_SELECT) || defined (FIONREAD)
201 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
202 #define DATAGRAM_SOCKETS
203 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
204 #endif /* HAVE_SELECT || FIONREAD */
205 #endif /* DATAGRAM_SOCKETS */
206 #endif /* BROKEN_DATAGRAM_SOCKETS */
208 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
209 # define HAVE_SEQPACKET
212 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
213 #ifdef EMACS_HAS_USECS
214 #define ADAPTIVE_READ_BUFFERING
218 #ifdef ADAPTIVE_READ_BUFFERING
219 #define READ_OUTPUT_DELAY_INCREMENT 10000
220 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
221 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
223 /* Number of processes which have a non-zero read_output_delay,
224 and therefore might be delayed for adaptive read buffering. */
226 static int process_output_delay_count
;
228 /* Non-zero if any process has non-nil read_output_skip. */
230 static int process_output_skip
;
233 #define process_output_delay_count 0
236 static Lisp_Object
Fget_process (Lisp_Object
);
237 static void create_process (Lisp_Object
, char **, Lisp_Object
);
239 static int keyboard_bit_set (SELECT_TYPE
*);
241 static void deactivate_process (Lisp_Object
);
242 static void status_notify (struct Lisp_Process
*);
243 static int read_process_output (Lisp_Object
, int);
244 static void create_pty (Lisp_Object
);
246 /* If we support a window system, turn on the code to poll periodically
247 to detect C-g. It isn't actually used when doing interrupt input. */
248 #ifdef HAVE_WINDOW_SYSTEM
249 #define POLL_FOR_INPUT
252 static Lisp_Object
get_process (register Lisp_Object name
);
253 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
255 /* Mask of bits indicating the descriptors that we wait for input on. */
257 static SELECT_TYPE input_wait_mask
;
259 /* Mask that excludes keyboard input descriptor(s). */
261 static SELECT_TYPE non_keyboard_wait_mask
;
263 /* Mask that excludes process input descriptor(s). */
265 static SELECT_TYPE non_process_wait_mask
;
267 /* Mask for selecting for write. */
269 static SELECT_TYPE write_mask
;
271 #ifdef NON_BLOCKING_CONNECT
272 /* Mask of bits indicating the descriptors that we wait for connect to
273 complete on. Once they complete, they are removed from this mask
274 and added to the input_wait_mask and non_keyboard_wait_mask. */
276 static SELECT_TYPE connect_wait_mask
;
278 /* Number of bits set in connect_wait_mask. */
279 static int num_pending_connects
;
280 #endif /* NON_BLOCKING_CONNECT */
282 /* The largest descriptor currently in use for a process object. */
283 static int max_process_desc
;
285 /* The largest descriptor currently in use for input. */
286 static int max_input_desc
;
288 /* Indexed by descriptor, gives the process (if any) for that descriptor */
289 static Lisp_Object chan_process
[MAXDESC
];
291 /* Alist of elements (NAME . PROCESS) */
292 static Lisp_Object Vprocess_alist
;
294 /* Buffered-ahead input char from process, indexed by channel.
295 -1 means empty (no char is buffered).
296 Used on sys V where the only way to tell if there is any
297 output from the process is to read at least one char.
298 Always -1 on systems that support FIONREAD. */
300 static int proc_buffered_char
[MAXDESC
];
302 /* Table of `struct coding-system' for each process. */
303 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
304 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
306 #ifdef DATAGRAM_SOCKETS
307 /* Table of `partner address' for datagram sockets. */
308 static struct sockaddr_and_len
{
311 } datagram_address
[MAXDESC
];
312 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
313 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
315 #define DATAGRAM_CHAN_P(chan) (0)
316 #define DATAGRAM_CONN_P(proc) (0)
319 /* Maximum number of bytes to send to a pty without an eof. */
320 static int pty_max_bytes
;
324 static struct fd_callback_data
330 int condition
; /* mask of the defines above. */
331 } fd_callback_info
[MAXDESC
];
334 /* Add a file descriptor FD to be monitored for when read is possible.
335 When read is possible, call FUNC with argument DATA. */
338 add_read_fd (int fd
, fd_callback func
, void *data
)
340 xassert (fd
< MAXDESC
);
341 add_keyboard_wait_descriptor (fd
);
343 fd_callback_info
[fd
].func
= func
;
344 fd_callback_info
[fd
].data
= data
;
345 fd_callback_info
[fd
].condition
|= FOR_READ
;
348 /* Stop monitoring file descriptor FD for when read is possible. */
351 delete_read_fd (int fd
)
353 xassert (fd
< MAXDESC
);
354 delete_keyboard_wait_descriptor (fd
);
356 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
357 if (fd_callback_info
[fd
].condition
== 0)
359 fd_callback_info
[fd
].func
= 0;
360 fd_callback_info
[fd
].data
= 0;
364 /* Add a file descriptor FD to be monitored for when write is possible.
365 When write is possible, call FUNC with argument DATA. */
368 add_write_fd (int fd
, fd_callback func
, void *data
)
370 xassert (fd
< MAXDESC
);
371 FD_SET (fd
, &write_mask
);
372 if (fd
> max_input_desc
)
375 fd_callback_info
[fd
].func
= func
;
376 fd_callback_info
[fd
].data
= data
;
377 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
380 /* Stop monitoring file descriptor FD for when write is possible. */
383 delete_write_fd (int fd
)
385 int lim
= max_input_desc
;
387 xassert (fd
< MAXDESC
);
388 FD_CLR (fd
, &write_mask
);
389 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
390 if (fd_callback_info
[fd
].condition
== 0)
392 fd_callback_info
[fd
].func
= 0;
393 fd_callback_info
[fd
].data
= 0;
395 if (fd
== max_input_desc
)
396 for (fd
= lim
; fd
>= 0; fd
--)
397 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
407 /* Compute the Lisp form of the process status, p->status, from
408 the numeric status that was returned by `wait'. */
410 static Lisp_Object
status_convert (int);
413 update_status (struct Lisp_Process
*p
)
415 eassert (p
->raw_status_new
);
416 p
->status
= status_convert (p
->raw_status
);
417 p
->raw_status_new
= 0;
420 /* Convert a process status word in Unix format to
421 the list that we use internally. */
424 status_convert (int w
)
427 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
428 else if (WIFEXITED (w
))
429 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
430 WCOREDUMP (w
) ? Qt
: Qnil
));
431 else if (WIFSIGNALED (w
))
432 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
433 WCOREDUMP (w
) ? Qt
: Qnil
));
438 /* Given a status-list, extract the three pieces of information
439 and store them individually through the three pointers. */
442 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
456 *code
= XFASTINT (XCAR (tem
));
458 *coredump
= !NILP (tem
);
462 /* Return a string describing a process status list. */
465 status_message (struct Lisp_Process
*p
)
467 Lisp_Object status
= p
->status
;
470 Lisp_Object string
, string2
;
472 decode_status (status
, &symbol
, &code
, &coredump
);
474 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
477 synchronize_system_messages_locale ();
478 signame
= strsignal (code
);
480 string
= build_string ("unknown");
485 string
= make_unibyte_string (signame
, strlen (signame
));
486 if (! NILP (Vlocale_coding_system
))
487 string
= (code_convert_string_norecord
488 (string
, Vlocale_coding_system
, 0));
489 c1
= STRING_CHAR (SDATA (string
));
492 Faset (string
, make_number (0), make_number (c2
));
494 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
495 return concat2 (string
, string2
);
497 else if (EQ (symbol
, Qexit
))
500 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
502 return build_string ("finished\n");
503 string
= Fnumber_to_string (make_number (code
));
504 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
505 return concat3 (build_string ("exited abnormally with code "),
508 else if (EQ (symbol
, Qfailed
))
510 string
= Fnumber_to_string (make_number (code
));
511 string2
= build_string ("\n");
512 return concat3 (build_string ("failed with code "),
516 return Fcopy_sequence (Fsymbol_name (symbol
));
521 /* The file name of the pty opened by allocate_pty. */
522 static char pty_name
[24];
524 /* Open an available pty, returning a file descriptor.
525 Return -1 on failure.
526 The file name of the terminal corresponding to the pty
527 is left in the variable pty_name. */
538 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
539 for (i
= 0; i
< 16; i
++)
542 #ifdef PTY_NAME_SPRINTF
545 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
546 #endif /* no PTY_NAME_SPRINTF */
550 #else /* no PTY_OPEN */
552 { /* Some systems name their pseudoterminals so that there are gaps in
553 the usual sequence - for example, on HP9000/S700 systems, there
554 are no pseudoterminals with names ending in 'f'. So we wait for
555 three failures in a row before deciding that we've reached the
557 int failed_count
= 0;
560 if (stat (pty_name
, &stb
) < 0)
563 if (failed_count
>= 3)
570 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
572 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
575 #endif /* no PTY_OPEN */
579 /* check to make certain that both sides are available
580 this avoids a nasty yet stupid bug in rlogins */
581 #ifdef PTY_TTY_NAME_SPRINTF
584 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
585 #endif /* no PTY_TTY_NAME_SPRINTF */
586 if (access (pty_name
, 6) != 0)
601 #endif /* HAVE_PTYS */
604 make_process (Lisp_Object name
)
606 register Lisp_Object val
, tem
, name1
;
607 register struct Lisp_Process
*p
;
611 p
= allocate_process ();
619 p
->raw_status_new
= 0;
621 p
->mark
= Fmake_marker ();
622 p
->kill_without_query
= 0;
624 #ifdef ADAPTIVE_READ_BUFFERING
625 p
->adaptive_read_buffering
= 0;
626 p
->read_output_delay
= 0;
627 p
->read_output_skip
= 0;
631 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
632 p
->gnutls_log_level
= 0;
636 /* If name is already in use, modify it until it is unused. */
641 tem
= Fget_process (name1
);
642 if (NILP (tem
)) break;
643 sprintf (suffix
, "<%d>", i
);
644 name1
= concat2 (name
, build_string (suffix
));
648 XSETPROCESS (val
, p
);
649 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
654 remove_process (register Lisp_Object proc
)
656 register Lisp_Object pair
;
658 pair
= Frassq (proc
, Vprocess_alist
);
659 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
661 deactivate_process (proc
);
665 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
666 doc
: /* Return t if OBJECT is a process. */)
669 return PROCESSP (object
) ? Qt
: Qnil
;
672 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
673 doc
: /* Return the process named NAME, or nil if there is none. */)
674 (register Lisp_Object name
)
679 return Fcdr (Fassoc (name
, Vprocess_alist
));
682 /* This is how commands for the user decode process arguments. It
683 accepts a process, a process name, a buffer, a buffer name, or nil.
684 Buffers denote the first process in the buffer, and nil denotes the
688 get_process (register Lisp_Object name
)
690 register Lisp_Object proc
, obj
;
693 obj
= Fget_process (name
);
695 obj
= Fget_buffer (name
);
697 error ("Process %s does not exist", SDATA (name
));
699 else if (NILP (name
))
700 obj
= Fcurrent_buffer ();
704 /* Now obj should be either a buffer object or a process object.
708 proc
= Fget_buffer_process (obj
);
710 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
722 /* Fdelete_process promises to immediately forget about the process, but in
723 reality, Emacs needs to remember those processes until they have been
724 treated by sigchld_handler; otherwise this handler would consider the
725 process as being synchronous and say that the synchronous process is
727 static Lisp_Object deleted_pid_list
;
730 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
731 doc
: /* Delete PROCESS: kill it and forget about it immediately.
732 PROCESS may be a process, a buffer, the name of a process or buffer, or
733 nil, indicating the current buffer's process. */)
734 (register Lisp_Object process
)
736 register struct Lisp_Process
*p
;
738 process
= get_process (process
);
739 p
= XPROCESS (process
);
741 p
->raw_status_new
= 0;
742 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
744 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
745 p
->tick
= ++process_tick
;
747 redisplay_preserve_echo_area (13);
749 else if (p
->infd
>= 0)
753 /* Assignment to EMACS_INT stops GCC whining about limited range
755 EMACS_INT pid
= p
->pid
;
757 /* No problem storing the pid here, as it is still in Vprocess_alist. */
758 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
759 /* GC treated elements set to nil. */
760 Fdelq (Qnil
, deleted_pid_list
));
761 /* If the process has already signaled, remove it from the list. */
762 if (p
->raw_status_new
)
765 if (CONSP (p
->status
))
766 symbol
= XCAR (p
->status
);
767 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
769 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
773 Fkill_process (process
, Qnil
);
774 /* Do this now, since remove_process will make sigchld_handler do nothing. */
776 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
777 p
->tick
= ++process_tick
;
779 redisplay_preserve_echo_area (13);
782 remove_process (process
);
786 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
787 doc
: /* Return the status of PROCESS.
788 The returned value is one of the following symbols:
789 run -- for a process that is running.
790 stop -- for a process stopped but continuable.
791 exit -- for a process that has exited.
792 signal -- for a process that has got a fatal signal.
793 open -- for a network stream connection that is open.
794 listen -- for a network stream server that is listening.
795 closed -- for a network stream connection that is closed.
796 connect -- when waiting for a non-blocking connection to complete.
797 failed -- when a non-blocking connection has failed.
798 nil -- if arg is a process name and no such process exists.
799 PROCESS may be a process, a buffer, the name of a process, or
800 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 (p
->raw_status_new
)
819 status
= XCAR (status
);
820 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
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. */)
836 (register Lisp_Object process
)
838 CHECK_PROCESS (process
);
839 if (XPROCESS (process
)->raw_status_new
)
840 update_status (XPROCESS (process
));
841 if (CONSP (XPROCESS (process
)->status
))
842 return XCAR (XCDR (XPROCESS (process
)->status
));
843 return make_number (0);
846 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
847 doc
: /* Return the process id of PROCESS.
848 This is the pid of the external process which PROCESS uses or talks to.
849 For a network connection, this value is nil. */)
850 (register Lisp_Object process
)
852 /* Assignment to EMACS_INT stops GCC whining about limited range of
856 CHECK_PROCESS (process
);
857 pid
= XPROCESS (process
)->pid
;
858 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
861 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
862 doc
: /* Return the name of PROCESS, as a string.
863 This is the name of the program invoked in PROCESS,
864 possibly modified to make it unique among process names. */)
865 (register Lisp_Object process
)
867 CHECK_PROCESS (process
);
868 return XPROCESS (process
)->name
;
871 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
872 doc
: /* Return the command that was executed to start PROCESS.
873 This is a list of strings, the first string being the program executed
874 and the rest of the strings being the arguments given to it.
875 For a network or serial process, this is nil (process is running) or t
876 \(process is stopped). */)
877 (register Lisp_Object process
)
879 CHECK_PROCESS (process
);
880 return XPROCESS (process
)->command
;
883 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
884 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
885 This is the terminal that the process itself reads and writes on,
886 not the name of the pty that Emacs uses to talk with that terminal. */)
887 (register Lisp_Object process
)
889 CHECK_PROCESS (process
);
890 return XPROCESS (process
)->tty_name
;
893 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
895 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
897 (register Lisp_Object process
, Lisp_Object buffer
)
899 struct Lisp_Process
*p
;
901 CHECK_PROCESS (process
);
903 CHECK_BUFFER (buffer
);
904 p
= XPROCESS (process
);
906 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
907 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
908 setup_process_coding_systems (process
);
912 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
914 doc
: /* Return the buffer PROCESS is associated with.
915 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. */)
925 (register Lisp_Object process
)
927 CHECK_PROCESS (process
);
928 return XPROCESS (process
)->mark
;
931 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
933 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
934 A value of t means stop accepting output from the process.
936 When a process has a filter, its buffer is not used for output.
937 Instead, each time it does output, the entire string of output is
938 passed to the filter.
940 The filter gets two arguments: the process and the string of output.
941 The string argument is normally a multibyte string, except:
942 - if the process' input coding system is no-conversion or raw-text,
943 it is a unibyte string (the non-converted input), or else
944 - if `default-enable-multibyte-characters' is nil, it is a unibyte
945 string (the result of converting the decoded input multibyte
946 string to unibyte with `string-make-unibyte'). */)
947 (register Lisp_Object process
, Lisp_Object filter
)
949 struct Lisp_Process
*p
;
951 CHECK_PROCESS (process
);
952 p
= XPROCESS (process
);
954 /* Don't signal an error if the process' input file descriptor
955 is closed. This could make debugging Lisp more difficult,
956 for example when doing something like
958 (setq process (start-process ...))
960 (set-process-filter process ...) */
964 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
966 FD_CLR (p
->infd
, &input_wait_mask
);
967 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
969 else if (EQ (p
->filter
, Qt
)
970 /* Network or serial process not stopped: */
971 && !EQ (p
->command
, Qt
))
973 FD_SET (p
->infd
, &input_wait_mask
);
974 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
979 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
980 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
981 setup_process_coding_systems (process
);
985 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
987 doc
: /* Returns the filter function of PROCESS; nil if none.
988 See `set-process-filter' for more info on filter functions. */)
989 (register Lisp_Object process
)
991 CHECK_PROCESS (process
);
992 return XPROCESS (process
)->filter
;
995 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
997 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
998 The sentinel is called as a function when the process changes state.
999 It gets two arguments: the process, and a string describing the change. */)
1000 (register Lisp_Object process
, Lisp_Object sentinel
)
1002 struct Lisp_Process
*p
;
1004 CHECK_PROCESS (process
);
1005 p
= XPROCESS (process
);
1007 p
->sentinel
= sentinel
;
1008 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1009 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1013 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1015 doc
: /* Return the sentinel of PROCESS; nil if none.
1016 See `set-process-sentinel' for more info on sentinels. */)
1017 (register Lisp_Object process
)
1019 CHECK_PROCESS (process
);
1020 return XPROCESS (process
)->sentinel
;
1023 DEFUN ("set-process-window-size", Fset_process_window_size
,
1024 Sset_process_window_size
, 3, 3, 0,
1025 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1026 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1028 CHECK_PROCESS (process
);
1029 CHECK_NATNUM (height
);
1030 CHECK_NATNUM (width
);
1032 if (XPROCESS (process
)->infd
< 0
1033 || set_window_size (XPROCESS (process
)->infd
,
1034 XINT (height
), XINT (width
)) <= 0)
1040 DEFUN ("set-process-inherit-coding-system-flag",
1041 Fset_process_inherit_coding_system_flag
,
1042 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1043 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1044 If the second argument FLAG is non-nil, then the variable
1045 `buffer-file-coding-system' of the buffer associated with PROCESS
1046 will be bound to the value of the coding system used to decode
1049 This is useful when the coding system specified for the process buffer
1050 leaves either the character code conversion or the end-of-line conversion
1051 unspecified, or if the coding system used to decode the process output
1052 is more appropriate for saving the process buffer.
1054 Binding the variable `inherit-process-coding-system' to non-nil before
1055 starting the process is an alternative way of setting the inherit flag
1056 for the process which will run. */)
1057 (register Lisp_Object process
, Lisp_Object flag
)
1059 CHECK_PROCESS (process
);
1060 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1064 DEFUN ("set-process-query-on-exit-flag",
1065 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1067 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1068 If the second argument FLAG is non-nil, Emacs will query the user before
1069 exiting or killing a buffer if PROCESS is running. */)
1070 (register Lisp_Object process
, Lisp_Object flag
)
1072 CHECK_PROCESS (process
);
1073 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1077 DEFUN ("process-query-on-exit-flag",
1078 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1080 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1081 (register Lisp_Object process
)
1083 CHECK_PROCESS (process
);
1084 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1087 #ifdef DATAGRAM_SOCKETS
1088 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1091 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1093 doc
: /* Return the contact info of PROCESS; t for a real child.
1094 For a network or serial connection, the value depends on the optional
1095 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1096 SERVICE) for a network connection or (PORT SPEED) for a serial
1097 connection. If KEY is t, the complete contact information for the
1098 connection is returned, else the specific value for the keyword KEY is
1099 returned. See `make-network-process' or `make-serial-process' for a
1100 list of keywords. */)
1101 (register Lisp_Object process
, Lisp_Object key
)
1103 Lisp_Object contact
;
1105 CHECK_PROCESS (process
);
1106 contact
= XPROCESS (process
)->childp
;
1108 #ifdef DATAGRAM_SOCKETS
1109 if (DATAGRAM_CONN_P (process
)
1110 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1111 contact
= Fplist_put (contact
, QCremote
,
1112 Fprocess_datagram_address (process
));
1115 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1117 if (NILP (key
) && NETCONN_P (process
))
1118 return Fcons (Fplist_get (contact
, QChost
),
1119 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1120 if (NILP (key
) && SERIALCONN_P (process
))
1121 return Fcons (Fplist_get (contact
, QCport
),
1122 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1123 return Fplist_get (contact
, key
);
1126 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1128 doc
: /* Return the plist of PROCESS. */)
1129 (register Lisp_Object process
)
1131 CHECK_PROCESS (process
);
1132 return XPROCESS (process
)->plist
;
1135 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1137 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1138 (register Lisp_Object process
, Lisp_Object plist
)
1140 CHECK_PROCESS (process
);
1143 XPROCESS (process
)->plist
= plist
;
1147 #if 0 /* Turned off because we don't currently record this info
1148 in the process. Perhaps add it. */
1149 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1150 doc
: /* Return the connection type of PROCESS.
1151 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1152 a socket connection. */)
1153 (Lisp_Object process
)
1155 return XPROCESS (process
)->type
;
1159 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1160 doc
: /* Return the connection type of PROCESS.
1161 The value is either the symbol `real', `network', or `serial'.
1162 PROCESS may be a process, a buffer, the name of a process or buffer, or
1163 nil, indicating the current buffer's process. */)
1164 (Lisp_Object process
)
1167 proc
= get_process (process
);
1168 return XPROCESS (proc
)->type
;
1171 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1173 doc
: /* Convert network ADDRESS from internal format to a string.
1174 A 4 or 5 element vector represents an IPv4 address (with port number).
1175 An 8 or 9 element vector represents an IPv6 address (with port number).
1176 If optional second argument OMIT-PORT is non-nil, don't include a port
1177 number in the string, even when present in ADDRESS.
1178 Returns nil if format of ADDRESS is invalid. */)
1179 (Lisp_Object address
, Lisp_Object omit_port
)
1184 if (STRINGP (address
)) /* AF_LOCAL */
1187 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1189 register struct Lisp_Vector
*p
= XVECTOR (address
);
1190 EMACS_INT size
= p
->header
.size
;
1191 Lisp_Object args
[10];
1194 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1196 args
[0] = build_string ("%d.%d.%d.%d");
1201 args
[0] = build_string ("%d.%d.%d.%d:%d");
1204 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1206 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1211 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1217 for (i
= 0; i
< nargs
; i
++)
1219 EMACS_INT element
= XINT (p
->contents
[i
]);
1221 if (element
< 0 || element
> 65535)
1224 if (nargs
<= 5 /* IPv4 */
1225 && i
< 4 /* host, not port */
1229 args
[i
+1] = p
->contents
[i
];
1232 return Fformat (nargs
+1, args
);
1235 if (CONSP (address
))
1237 Lisp_Object args
[2];
1238 args
[0] = build_string ("<Family %d>");
1239 args
[1] = Fcar (address
);
1240 return Fformat (2, args
);
1246 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1247 doc
: /* Return a list of all processes. */)
1250 return Fmapcar (Qcdr
, Vprocess_alist
);
1253 /* Starting asynchronous inferior processes. */
1255 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1257 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1258 doc
: /* Start a program in a subprocess. Return the process object for it.
1259 NAME is name for process. It is modified if necessary to make it unique.
1260 BUFFER is the buffer (or buffer name) to associate with the process.
1262 Process output (both standard output and standard error streams) goes
1263 at end of BUFFER, unless you specify an output stream or filter
1264 function to handle the output. BUFFER may also be nil, meaning that
1265 this process is not associated with any buffer.
1267 PROGRAM is the program file name. It is searched for in `exec-path'
1268 (which see). If nil, just associate a pty with the buffer. Remaining
1269 arguments are strings to give program as arguments.
1271 If you want to separate standard output from standard error, invoke
1272 the command through a shell and redirect one of them using the shell
1275 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1276 (ptrdiff_t nargs
, Lisp_Object
*args
)
1278 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1279 register unsigned char **new_argv
;
1281 int count
= SPECPDL_INDEX ();
1285 buffer
= Fget_buffer_create (buffer
);
1287 /* Make sure that the child will be able to chdir to the current
1288 buffer's current directory, or its unhandled equivalent. We
1289 can't just have the child check for an error when it does the
1290 chdir, since it's in a vfork.
1292 We have to GCPRO around this because Fexpand_file_name and
1293 Funhandled_file_name_directory might call a file name handling
1294 function. The argument list is protected by the caller, so all
1295 we really have to worry about is buffer. */
1297 struct gcpro gcpro1
, gcpro2
;
1299 current_dir
= BVAR (current_buffer
, directory
);
1301 GCPRO2 (buffer
, current_dir
);
1303 current_dir
= Funhandled_file_name_directory (current_dir
);
1304 if (NILP (current_dir
))
1305 /* If the file name handler says that current_dir is unreachable, use
1306 a sensible default. */
1307 current_dir
= build_string ("~/");
1308 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1309 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1310 report_file_error ("Setting current directory",
1311 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1317 CHECK_STRING (name
);
1321 if (!NILP (program
))
1322 CHECK_STRING (program
);
1324 proc
= make_process (name
);
1325 /* If an error occurs and we can't start the process, we want to
1326 remove it from the process list. This means that each error
1327 check in create_process doesn't need to call remove_process
1328 itself; it's all taken care of here. */
1329 record_unwind_protect (start_process_unwind
, proc
);
1331 XPROCESS (proc
)->childp
= Qt
;
1332 XPROCESS (proc
)->plist
= Qnil
;
1333 XPROCESS (proc
)->type
= Qreal
;
1334 XPROCESS (proc
)->buffer
= buffer
;
1335 XPROCESS (proc
)->sentinel
= Qnil
;
1336 XPROCESS (proc
)->filter
= Qnil
;
1337 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1340 /* AKA GNUTLS_INITSTAGE(proc). */
1341 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1342 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1345 #ifdef ADAPTIVE_READ_BUFFERING
1346 XPROCESS (proc
)->adaptive_read_buffering
1347 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1348 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1351 /* Make the process marker point into the process buffer (if any). */
1352 if (BUFFERP (buffer
))
1353 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1354 BUF_ZV (XBUFFER (buffer
)),
1355 BUF_ZV_BYTE (XBUFFER (buffer
)));
1358 /* Decide coding systems for communicating with the process. Here
1359 we don't setup the structure coding_system nor pay attention to
1360 unibyte mode. They are done in create_process. */
1362 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1363 Lisp_Object coding_systems
= Qt
;
1364 Lisp_Object val
, *args2
;
1365 struct gcpro gcpro1
, gcpro2
;
1367 val
= Vcoding_system_for_read
;
1370 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1371 args2
[0] = Qstart_process
;
1372 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1373 GCPRO2 (proc
, current_dir
);
1374 if (!NILP (program
))
1375 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1377 if (CONSP (coding_systems
))
1378 val
= XCAR (coding_systems
);
1379 else if (CONSP (Vdefault_process_coding_system
))
1380 val
= XCAR (Vdefault_process_coding_system
);
1382 XPROCESS (proc
)->decode_coding_system
= val
;
1384 val
= Vcoding_system_for_write
;
1387 if (EQ (coding_systems
, Qt
))
1389 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1390 args2
[0] = Qstart_process
;
1391 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1392 GCPRO2 (proc
, current_dir
);
1393 if (!NILP (program
))
1394 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1397 if (CONSP (coding_systems
))
1398 val
= XCDR (coding_systems
);
1399 else if (CONSP (Vdefault_process_coding_system
))
1400 val
= XCDR (Vdefault_process_coding_system
);
1402 XPROCESS (proc
)->encode_coding_system
= val
;
1403 /* Note: At this momemnt, the above coding system may leave
1404 text-conversion or eol-conversion unspecified. They will be
1405 decided after we read output from the process and decode it by
1406 some coding system, or just before we actually send a text to
1411 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1412 XPROCESS (proc
)->decoding_carryover
= 0;
1413 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1415 XPROCESS (proc
)->inherit_coding_system_flag
1416 = !(NILP (buffer
) || !inherit_process_coding_system
);
1418 if (!NILP (program
))
1420 /* If program file name is not absolute, search our path for it.
1421 Put the name we will really use in TEM. */
1422 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1423 && !(SCHARS (program
) > 1
1424 && IS_DEVICE_SEP (SREF (program
, 1))))
1426 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1429 GCPRO4 (name
, program
, buffer
, current_dir
);
1430 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1433 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1434 tem
= Fexpand_file_name (tem
, Qnil
);
1438 if (!NILP (Ffile_directory_p (program
)))
1439 error ("Specified program for new process is a directory");
1443 /* If program file name starts with /: for quoting a magic name,
1445 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1446 && SREF (tem
, 1) == ':')
1447 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1450 Lisp_Object arg_encoding
= Qnil
;
1451 struct gcpro gcpro1
;
1454 /* Encode the file name and put it in NEW_ARGV.
1455 That's where the child will use it to execute the program. */
1456 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1458 /* Here we encode arguments by the coding system used for sending
1459 data to the process. We don't support using different coding
1460 systems for encoding arguments and for encoding data sent to the
1463 for (i
= 3; i
< nargs
; i
++)
1465 tem
= Fcons (args
[i
], tem
);
1466 CHECK_STRING (XCAR (tem
));
1467 if (STRING_MULTIBYTE (XCAR (tem
)))
1469 if (NILP (arg_encoding
))
1470 arg_encoding
= (complement_process_encoding_system
1471 (XPROCESS (proc
)->encode_coding_system
));
1473 code_convert_string_norecord
1474 (XCAR (tem
), arg_encoding
, 1));
1481 /* Now that everything is encoded we can collect the strings into
1483 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1484 new_argv
[nargs
- 2] = 0;
1486 for (i
= nargs
- 2; i
-- != 0; )
1488 new_argv
[i
] = SDATA (XCAR (tem
));
1492 create_process (proc
, (char **) new_argv
, current_dir
);
1497 return unbind_to (count
, proc
);
1500 /* This function is the unwind_protect form for Fstart_process. If
1501 PROC doesn't have its pid set, then we know someone has signaled
1502 an error and the process wasn't started successfully, so we should
1503 remove it from the process list. */
1505 start_process_unwind (Lisp_Object proc
)
1507 if (!PROCESSP (proc
))
1510 /* Was PROC started successfully? */
1511 if (XPROCESS (proc
)->pid
== -1)
1512 remove_process (proc
);
1518 create_process_1 (struct atimer
*timer
)
1520 /* Nothing to do. */
1525 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1527 int inchannel
, outchannel
;
1530 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1531 int wait_child_setup
[2];
1535 struct sigaction sigint_action
;
1536 struct sigaction sigquit_action
;
1537 struct sigaction sigpipe_action
;
1539 struct sigaction sighup_action
;
1541 /* Use volatile to protect variables from being clobbered by longjmp. */
1542 volatile int forkin
, forkout
;
1543 volatile int pty_flag
= 0;
1545 extern char **environ
;
1548 inchannel
= outchannel
= -1;
1551 if (!NILP (Vprocess_connection_type
))
1552 outchannel
= inchannel
= allocate_pty ();
1556 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1557 /* On most USG systems it does not work to open the pty's tty here,
1558 then close it and reopen it in the child. */
1560 /* Don't let this terminal become our controlling terminal
1561 (in case we don't have one). */
1562 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1564 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1567 report_file_error ("Opening pty", Qnil
);
1569 forkin
= forkout
= -1;
1570 #endif /* not USG, or USG_SUBTTY_WORKS */
1574 #endif /* HAVE_PTYS */
1579 report_file_error ("Creating pipe", Qnil
);
1585 emacs_close (inchannel
);
1586 emacs_close (forkout
);
1587 report_file_error ("Creating pipe", Qnil
);
1593 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1597 tem
= pipe (wait_child_setup
);
1599 report_file_error ("Creating pipe", Qnil
);
1600 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1602 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1605 emacs_close (wait_child_setup
[0]);
1606 emacs_close (wait_child_setup
[1]);
1607 report_file_error ("Setting file descriptor flags", Qnil
);
1613 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1614 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1617 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1618 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1622 /* Record this as an active process, with its channels.
1623 As a result, child_setup will close Emacs's side of the pipes. */
1624 chan_process
[inchannel
] = process
;
1625 XPROCESS (process
)->infd
= inchannel
;
1626 XPROCESS (process
)->outfd
= outchannel
;
1628 /* Previously we recorded the tty descriptor used in the subprocess.
1629 It was only used for getting the foreground tty process, so now
1630 we just reopen the device (see emacs_get_tty_pgrp) as this is
1631 more portable (see USG_SUBTTY_WORKS above). */
1633 XPROCESS (process
)->pty_flag
= pty_flag
;
1634 XPROCESS (process
)->status
= Qrun
;
1635 setup_process_coding_systems (process
);
1637 /* Delay interrupts until we have a chance to store
1638 the new fork's pid in its process structure */
1639 sigemptyset (&blocked
);
1641 sigaddset (&blocked
, SIGCHLD
);
1643 #ifdef HAVE_WORKING_VFORK
1644 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1645 this sets the parent's signal handlers as well as the child's.
1646 So delay all interrupts whose handlers the child might munge,
1647 and record the current handlers so they can be restored later. */
1648 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1649 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1650 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1652 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1654 #endif /* HAVE_WORKING_VFORK */
1655 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1657 FD_SET (inchannel
, &input_wait_mask
);
1658 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1659 if (inchannel
> max_process_desc
)
1660 max_process_desc
= inchannel
;
1662 /* Until we store the proper pid, enable sigchld_handler
1663 to recognize an unknown pid as standing for this process.
1664 It is very important not to let this `marker' value stay
1665 in the table after this function has returned; if it does
1666 it might cause call-process to hang and subsequent asynchronous
1667 processes to get their return values scrambled. */
1668 XPROCESS (process
)->pid
= -1;
1673 /* child_setup must clobber environ on systems with true vfork.
1674 Protect it from permanent change. */
1675 char **save_environ
= environ
;
1676 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1681 #endif /* not WINDOWSNT */
1683 int xforkin
= forkin
;
1684 int xforkout
= forkout
;
1686 #if 0 /* This was probably a mistake--it duplicates code later on,
1687 but fails to handle all the cases. */
1688 /* Make sure SIGCHLD is not blocked in the child. */
1689 sigsetmask (SIGEMPTYMASK
);
1692 /* Make the pty be the controlling terminal of the process. */
1694 /* First, disconnect its current controlling terminal. */
1696 /* We tried doing setsid only if pty_flag, but it caused
1697 process_set_signal to fail on SGI when using a pipe. */
1699 /* Make the pty's terminal the controlling terminal. */
1700 if (pty_flag
&& xforkin
>= 0)
1703 /* We ignore the return value
1704 because faith@cs.unc.edu says that is necessary on Linux. */
1705 ioctl (xforkin
, TIOCSCTTY
, 0);
1708 #else /* not HAVE_SETSID */
1710 /* It's very important to call setpgrp here and no time
1711 afterwards. Otherwise, we lose our controlling tty which
1712 is set when we open the pty. */
1715 #endif /* not HAVE_SETSID */
1716 #if defined (LDISC1)
1717 if (pty_flag
&& xforkin
>= 0)
1720 tcgetattr (xforkin
, &t
);
1722 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1723 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1726 #if defined (NTTYDISC) && defined (TIOCSETD)
1727 if (pty_flag
&& xforkin
>= 0)
1729 /* Use new line discipline. */
1730 int ldisc
= NTTYDISC
;
1731 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1736 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1737 can do TIOCSPGRP only to the process's controlling tty. */
1740 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1741 I can't test it since I don't have 4.3. */
1742 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1745 ioctl (j
, TIOCNOTTY
, 0);
1749 /* In order to get a controlling terminal on some versions
1750 of BSD, it is necessary to put the process in pgrp 0
1751 before it opens the terminal. */
1759 #endif /* TIOCNOTTY */
1761 #if !defined (DONT_REOPEN_PTY)
1762 /*** There is a suggestion that this ought to be a
1763 conditional on TIOCSPGRP,
1764 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1765 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1766 that system does seem to need this code, even though
1767 both HAVE_SETSID and TIOCSCTTY are defined. */
1768 /* Now close the pty (if we had it open) and reopen it.
1769 This makes the pty the controlling terminal of the subprocess. */
1773 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1776 emacs_close (xforkin
);
1777 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1781 emacs_write (1, "Couldn't open the pty terminal ", 31);
1782 emacs_write (1, pty_name
, strlen (pty_name
));
1783 emacs_write (1, "\n", 1);
1788 #endif /* not DONT_REOPEN_PTY */
1790 #ifdef SETUP_SLAVE_PTY
1795 #endif /* SETUP_SLAVE_PTY */
1797 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1798 Now reenable it in the child, so it will die when we want it to. */
1800 signal (SIGHUP
, SIG_DFL
);
1802 #endif /* HAVE_PTYS */
1804 signal (SIGINT
, SIG_DFL
);
1805 signal (SIGQUIT
, SIG_DFL
);
1806 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1808 signal (SIGPIPE
, SIG_DFL
);
1810 /* Stop blocking signals in the child. */
1811 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1814 child_setup_tty (xforkout
);
1816 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1817 new_argv
, 1, encoded_current_dir
);
1818 #else /* not WINDOWSNT */
1820 emacs_close (wait_child_setup
[0]);
1822 child_setup (xforkin
, xforkout
, xforkout
,
1823 new_argv
, 1, encoded_current_dir
);
1824 #endif /* not WINDOWSNT */
1826 environ
= save_environ
;
1831 /* This runs in the Emacs process. */
1835 emacs_close (forkin
);
1836 if (forkin
!= forkout
&& forkout
>= 0)
1837 emacs_close (forkout
);
1841 /* vfork succeeded. */
1842 XPROCESS (process
)->pid
= pid
;
1845 register_child (pid
, inchannel
);
1846 #endif /* WINDOWSNT */
1848 /* If the subfork execv fails, and it exits,
1849 this close hangs. I don't know why.
1850 So have an interrupt jar it loose. */
1852 struct atimer
*timer
;
1856 EMACS_SET_SECS_USECS (offset
, 1, 0);
1857 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1860 emacs_close (forkin
);
1862 cancel_atimer (timer
);
1866 if (forkin
!= forkout
&& forkout
>= 0)
1867 emacs_close (forkout
);
1871 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1874 XPROCESS (process
)->tty_name
= Qnil
;
1876 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1877 /* Wait for child_setup to complete in case that vfork is
1878 actually defined as fork. The descriptor wait_child_setup[1]
1879 of a pipe is closed at the child side either by close-on-exec
1880 on successful execvp or the _exit call in child_setup. */
1884 emacs_close (wait_child_setup
[1]);
1885 emacs_read (wait_child_setup
[0], &dummy
, 1);
1886 emacs_close (wait_child_setup
[0]);
1891 /* Restore the signal state whether vfork succeeded or not.
1892 (We will signal an error, below, if it failed.) */
1893 #ifdef HAVE_WORKING_VFORK
1894 /* Restore the parent's signal handlers. */
1895 sigaction (SIGINT
, &sigint_action
, 0);
1896 sigaction (SIGQUIT
, &sigquit_action
, 0);
1897 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1899 sigaction (SIGHUP
, &sighup_action
, 0);
1901 #endif /* HAVE_WORKING_VFORK */
1902 /* Stop blocking signals in the parent. */
1903 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1905 /* Now generate the error if vfork failed. */
1907 report_file_error ("Doing vfork", Qnil
);
1911 create_pty (Lisp_Object process
)
1913 int inchannel
, outchannel
;
1916 inchannel
= outchannel
= -1;
1919 if (!NILP (Vprocess_connection_type
))
1920 outchannel
= inchannel
= allocate_pty ();
1924 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1925 /* On most USG systems it does not work to open the pty's tty here,
1926 then close it and reopen it in the child. */
1928 /* Don't let this terminal become our controlling terminal
1929 (in case we don't have one). */
1930 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1932 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1935 report_file_error ("Opening pty", Qnil
);
1936 #if defined (DONT_REOPEN_PTY)
1937 /* In the case that vfork is defined as fork, the parent process
1938 (Emacs) may send some data before the child process completes
1939 tty options setup. So we setup tty before forking. */
1940 child_setup_tty (forkout
);
1941 #endif /* DONT_REOPEN_PTY */
1942 #endif /* not USG, or USG_SUBTTY_WORKS */
1945 #endif /* HAVE_PTYS */
1948 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1949 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1952 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1953 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1957 /* Record this as an active process, with its channels.
1958 As a result, child_setup will close Emacs's side of the pipes. */
1959 chan_process
[inchannel
] = process
;
1960 XPROCESS (process
)->infd
= inchannel
;
1961 XPROCESS (process
)->outfd
= outchannel
;
1963 /* Previously we recorded the tty descriptor used in the subprocess.
1964 It was only used for getting the foreground tty process, so now
1965 we just reopen the device (see emacs_get_tty_pgrp) as this is
1966 more portable (see USG_SUBTTY_WORKS above). */
1968 XPROCESS (process
)->pty_flag
= pty_flag
;
1969 XPROCESS (process
)->status
= Qrun
;
1970 setup_process_coding_systems (process
);
1972 FD_SET (inchannel
, &input_wait_mask
);
1973 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1974 if (inchannel
> max_process_desc
)
1975 max_process_desc
= inchannel
;
1977 XPROCESS (process
)->pid
= -2;
1980 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1983 XPROCESS (process
)->tty_name
= Qnil
;
1987 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1988 The address family of sa is not included in the result. */
1991 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
1993 Lisp_Object address
;
1996 register struct Lisp_Vector
*p
;
1998 /* Workaround for a bug in getsockname on BSD: Names bound to
1999 sockets in the UNIX domain are inaccessible; getsockname returns
2000 a zero length name. */
2001 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2002 return empty_unibyte_string
;
2004 switch (sa
->sa_family
)
2008 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2009 len
= sizeof (sin
->sin_addr
) + 1;
2010 address
= Fmake_vector (make_number (len
), Qnil
);
2011 p
= XVECTOR (address
);
2012 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2013 cp
= (unsigned char *) &sin
->sin_addr
;
2019 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2020 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2021 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2022 address
= Fmake_vector (make_number (len
), Qnil
);
2023 p
= XVECTOR (address
);
2024 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2025 for (i
= 0; i
< len
; i
++)
2026 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2030 #ifdef HAVE_LOCAL_SOCKETS
2033 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2034 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2035 if (sockun
->sun_path
[i
] == 0)
2037 return make_unibyte_string (sockun
->sun_path
, i
);
2041 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2042 address
= Fcons (make_number (sa
->sa_family
),
2043 Fmake_vector (make_number (len
), Qnil
));
2044 p
= XVECTOR (XCDR (address
));
2045 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2051 p
->contents
[i
++] = make_number (*cp
++);
2057 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2060 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2062 register struct Lisp_Vector
*p
;
2064 if (VECTORP (address
))
2066 p
= XVECTOR (address
);
2067 if (p
->header
.size
== 5)
2070 return sizeof (struct sockaddr_in
);
2073 else if (p
->header
.size
== 9)
2075 *familyp
= AF_INET6
;
2076 return sizeof (struct sockaddr_in6
);
2080 #ifdef HAVE_LOCAL_SOCKETS
2081 else if (STRINGP (address
))
2083 *familyp
= AF_LOCAL
;
2084 return sizeof (struct sockaddr_un
);
2087 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2089 struct sockaddr
*sa
;
2090 *familyp
= XINT (XCAR (address
));
2091 p
= XVECTOR (XCDR (address
));
2092 return p
->header
.size
+ sizeof (sa
->sa_family
);
2097 /* Convert an address object (vector or string) to an internal sockaddr.
2099 The address format has been basically validated by
2100 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2101 it could have come from user data. So if FAMILY is not valid,
2102 we return after zeroing *SA. */
2105 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2107 register struct Lisp_Vector
*p
;
2108 register unsigned char *cp
= NULL
;
2111 memset (sa
, 0, len
);
2113 if (VECTORP (address
))
2115 p
= XVECTOR (address
);
2116 if (family
== AF_INET
)
2118 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2119 len
= sizeof (sin
->sin_addr
) + 1;
2120 i
= XINT (p
->contents
[--len
]);
2121 sin
->sin_port
= htons (i
);
2122 cp
= (unsigned char *)&sin
->sin_addr
;
2123 sa
->sa_family
= family
;
2126 else if (family
== AF_INET6
)
2128 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2129 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2130 len
= sizeof (sin6
->sin6_addr
) + 1;
2131 i
= XINT (p
->contents
[--len
]);
2132 sin6
->sin6_port
= htons (i
);
2133 for (i
= 0; i
< len
; i
++)
2134 if (INTEGERP (p
->contents
[i
]))
2136 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2139 sa
->sa_family
= family
;
2146 else if (STRINGP (address
))
2148 #ifdef HAVE_LOCAL_SOCKETS
2149 if (family
== AF_LOCAL
)
2151 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2152 cp
= SDATA (address
);
2153 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2154 sockun
->sun_path
[i
] = *cp
++;
2155 sa
->sa_family
= family
;
2162 p
= XVECTOR (XCDR (address
));
2163 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2166 for (i
= 0; i
< len
; i
++)
2167 if (INTEGERP (p
->contents
[i
]))
2168 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2171 #ifdef DATAGRAM_SOCKETS
2172 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2174 doc
: /* Get the current datagram address associated with PROCESS. */)
2175 (Lisp_Object process
)
2179 CHECK_PROCESS (process
);
2181 if (!DATAGRAM_CONN_P (process
))
2184 channel
= XPROCESS (process
)->infd
;
2185 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2186 datagram_address
[channel
].len
);
2189 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2191 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2192 Returns nil upon error setting address, ADDRESS otherwise. */)
2193 (Lisp_Object process
, Lisp_Object address
)
2198 CHECK_PROCESS (process
);
2200 if (!DATAGRAM_CONN_P (process
))
2203 channel
= XPROCESS (process
)->infd
;
2205 len
= get_lisp_to_sockaddr_size (address
, &family
);
2206 if (datagram_address
[channel
].len
!= len
)
2208 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2214 static const struct socket_options
{
2215 /* The name of this option. Should be lowercase version of option
2216 name without SO_ prefix. */
2218 /* Option level SOL_... */
2220 /* Option number SO_... */
2222 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2223 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2224 } socket_options
[] =
2226 #ifdef SO_BINDTODEVICE
2227 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2230 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2233 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2236 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2239 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2242 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2245 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2248 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2250 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2253 /* Set option OPT to value VAL on socket S.
2255 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2256 Signals an error if setting a known option fails.
2260 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2263 const struct socket_options
*sopt
;
2268 name
= SSDATA (SYMBOL_NAME (opt
));
2269 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2270 if (strcmp (name
, sopt
->name
) == 0)
2273 switch (sopt
->opttype
)
2278 optval
= NILP (val
) ? 0 : 1;
2279 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2280 &optval
, sizeof (optval
));
2288 optval
= XINT (val
);
2290 error ("Bad option value for %s", name
);
2291 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2292 &optval
, sizeof (optval
));
2296 #ifdef SO_BINDTODEVICE
2299 char devname
[IFNAMSIZ
+1];
2301 /* This is broken, at least in the Linux 2.4 kernel.
2302 To unbind, the arg must be a zero integer, not the empty string.
2303 This should work on all systems. KFS. 2003-09-23. */
2304 memset (devname
, 0, sizeof devname
);
2307 char *arg
= SSDATA (val
);
2308 int len
= min (strlen (arg
), IFNAMSIZ
);
2309 memcpy (devname
, arg
, len
);
2311 else if (!NILP (val
))
2312 error ("Bad option value for %s", name
);
2313 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2322 struct linger linger
;
2325 linger
.l_linger
= 0;
2327 linger
.l_linger
= XINT (val
);
2329 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2330 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2331 &linger
, sizeof (linger
));
2341 report_file_error ("Cannot set network option",
2342 Fcons (opt
, Fcons (val
, Qnil
)));
2343 return (1 << sopt
->optbit
);
2347 DEFUN ("set-network-process-option",
2348 Fset_network_process_option
, Sset_network_process_option
,
2350 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2351 See `make-network-process' for a list of options and values.
2352 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2353 OPTION is not a supported option, return nil instead; otherwise return t. */)
2354 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2357 struct Lisp_Process
*p
;
2359 CHECK_PROCESS (process
);
2360 p
= XPROCESS (process
);
2361 if (!NETCONN1_P (p
))
2362 error ("Process is not a network process");
2366 error ("Process is not running");
2368 if (set_socket_option (s
, option
, value
))
2370 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2374 if (NILP (no_error
))
2375 error ("Unknown or unsupported option");
2381 DEFUN ("serial-process-configure",
2382 Fserial_process_configure
,
2383 Sserial_process_configure
,
2385 doc
: /* Configure speed, bytesize, etc. of a serial process.
2387 Arguments are specified as keyword/argument pairs. Attributes that
2388 are not given are re-initialized from the process's current
2389 configuration (available via the function `process-contact') or set to
2390 reasonable default values. The following arguments are defined:
2396 -- Any of these arguments can be given to identify the process that is
2397 to be configured. If none of these arguments is given, the current
2398 buffer's process is used.
2400 :speed SPEED -- SPEED is the speed of the serial port in bits per
2401 second, also called baud rate. Any value can be given for SPEED, but
2402 most serial ports work only at a few defined values between 1200 and
2403 115200, with 9600 being the most common value. If SPEED is nil, the
2404 serial port is not configured any further, i.e., all other arguments
2405 are ignored. This may be useful for special serial ports such as
2406 Bluetooth-to-serial converters which can only be configured through AT
2407 commands. A value of nil for SPEED can be used only when passed
2408 through `make-serial-process' or `serial-term'.
2410 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2411 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2413 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2414 `odd' (use odd parity), or the symbol `even' (use even parity). If
2415 PARITY is not given, no parity is used.
2417 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2418 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2419 is not given or nil, 1 stopbit is used.
2421 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2422 flowcontrol to be used, which is either nil (don't use flowcontrol),
2423 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2424 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2425 flowcontrol is used.
2427 `serial-process-configure' is called by `make-serial-process' for the
2428 initial configuration of the serial port.
2432 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2434 \(serial-process-configure
2435 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2437 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2439 usage: (serial-process-configure &rest ARGS) */)
2440 (ptrdiff_t nargs
, Lisp_Object
*args
)
2442 struct Lisp_Process
*p
;
2443 Lisp_Object contact
= Qnil
;
2444 Lisp_Object proc
= Qnil
;
2445 struct gcpro gcpro1
;
2447 contact
= Flist (nargs
, args
);
2450 proc
= Fplist_get (contact
, QCprocess
);
2452 proc
= Fplist_get (contact
, QCname
);
2454 proc
= Fplist_get (contact
, QCbuffer
);
2456 proc
= Fplist_get (contact
, QCport
);
2457 proc
= get_process (proc
);
2458 p
= XPROCESS (proc
);
2459 if (!EQ (p
->type
, Qserial
))
2460 error ("Not a serial process");
2462 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2468 serial_configure (p
, contact
);
2474 /* Used by make-serial-process to recover from errors. */
2476 make_serial_process_unwind (Lisp_Object proc
)
2478 if (!PROCESSP (proc
))
2480 remove_process (proc
);
2484 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2486 doc
: /* Create and return a serial port process.
2488 In Emacs, serial port connections are represented by process objects,
2489 so input and output work as for subprocesses, and `delete-process'
2490 closes a serial port connection. However, a serial process has no
2491 process id, it cannot be signaled, and the status codes are different
2492 from normal processes.
2494 `make-serial-process' creates a process and a buffer, on which you
2495 probably want to use `process-send-string'. Try \\[serial-term] for
2496 an interactive terminal. See below for examples.
2498 Arguments are specified as keyword/argument pairs. The following
2499 arguments are defined:
2501 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2502 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2503 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2504 the backslashes in strings).
2506 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2507 which is called by `make-serial-process'.
2509 :name NAME -- NAME is the name of the process. If NAME is not given,
2510 the value of PORT is used.
2512 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2513 with the process. Process output goes at the end of that buffer,
2514 unless you specify an output stream or filter function to handle the
2515 output. If BUFFER is not given, the value of NAME is used.
2517 :coding CODING -- If CODING is a symbol, it specifies the coding
2518 system used for both reading and writing for this process. If CODING
2519 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2520 ENCODING is used for writing.
2522 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2523 the process is running. If BOOL is not given, query before exiting.
2525 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2526 In the stopped state, a serial process does not accept incoming data,
2527 but you can send outgoing data. The stopped state is cleared by
2528 `continue-process' and set by `stop-process'.
2530 :filter FILTER -- Install FILTER as the process filter.
2532 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2534 :plist PLIST -- Install PLIST as the initial plist of the process.
2541 -- These arguments are handled by `serial-process-configure', which is
2542 called by `make-serial-process'.
2544 The original argument list, possibly modified by later configuration,
2545 is available via the function `process-contact'.
2549 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2551 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2553 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2555 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2557 usage: (make-serial-process &rest ARGS) */)
2558 (ptrdiff_t nargs
, Lisp_Object
*args
)
2561 Lisp_Object proc
, contact
, port
;
2562 struct Lisp_Process
*p
;
2563 struct gcpro gcpro1
;
2564 Lisp_Object name
, buffer
;
2565 Lisp_Object tem
, val
;
2566 int specpdl_count
= -1;
2571 contact
= Flist (nargs
, args
);
2574 port
= Fplist_get (contact
, QCport
);
2576 error ("No port specified");
2577 CHECK_STRING (port
);
2579 if (NILP (Fplist_member (contact
, QCspeed
)))
2580 error (":speed not specified");
2581 if (!NILP (Fplist_get (contact
, QCspeed
)))
2582 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2584 name
= Fplist_get (contact
, QCname
);
2587 CHECK_STRING (name
);
2588 proc
= make_process (name
);
2589 specpdl_count
= SPECPDL_INDEX ();
2590 record_unwind_protect (make_serial_process_unwind
, proc
);
2591 p
= XPROCESS (proc
);
2593 fd
= serial_open (SSDATA (port
));
2596 if (fd
> max_process_desc
)
2597 max_process_desc
= fd
;
2598 chan_process
[fd
] = proc
;
2600 buffer
= Fplist_get (contact
, QCbuffer
);
2603 buffer
= Fget_buffer_create (buffer
);
2606 p
->childp
= contact
;
2607 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2609 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2610 p
->filter
= Fplist_get (contact
, QCfilter
);
2612 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2613 p
->kill_without_query
= 1;
2614 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2618 if (!EQ (p
->command
, Qt
))
2620 FD_SET (fd
, &input_wait_mask
);
2621 FD_SET (fd
, &non_keyboard_wait_mask
);
2624 if (BUFFERP (buffer
))
2626 set_marker_both (p
->mark
, buffer
,
2627 BUF_ZV (XBUFFER (buffer
)),
2628 BUF_ZV_BYTE (XBUFFER (buffer
)));
2631 tem
= Fplist_member (contact
, QCcoding
);
2632 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2638 val
= XCAR (XCDR (tem
));
2642 else if (!NILP (Vcoding_system_for_read
))
2643 val
= Vcoding_system_for_read
;
2644 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2645 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2647 p
->decode_coding_system
= val
;
2652 val
= XCAR (XCDR (tem
));
2656 else if (!NILP (Vcoding_system_for_write
))
2657 val
= Vcoding_system_for_write
;
2658 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2659 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2661 p
->encode_coding_system
= val
;
2663 setup_process_coding_systems (proc
);
2664 p
->decoding_buf
= empty_unibyte_string
;
2665 p
->decoding_carryover
= 0;
2666 p
->encoding_buf
= empty_unibyte_string
;
2667 p
->inherit_coding_system_flag
2668 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2670 Fserial_process_configure (nargs
, args
);
2672 specpdl_ptr
= specpdl
+ specpdl_count
;
2678 /* Create a network stream/datagram client/server process. Treated
2679 exactly like a normal process when reading and writing. Primary
2680 differences are in status display and process deletion. A network
2681 connection has no PID; you cannot signal it. All you can do is
2682 stop/continue it and deactivate/close it via delete-process */
2684 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2686 doc
: /* Create and return a network server or client process.
2688 In Emacs, network connections are represented by process objects, so
2689 input and output work as for subprocesses and `delete-process' closes
2690 a network connection. However, a network process has no process id,
2691 it cannot be signaled, and the status codes are different from normal
2694 Arguments are specified as keyword/argument pairs. The following
2695 arguments are defined:
2697 :name NAME -- NAME is name for process. It is modified if necessary
2700 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2701 with the process. Process output goes at end of that buffer, unless
2702 you specify an output stream or filter function to handle the output.
2703 BUFFER may be also nil, meaning that this process is not associated
2706 :host HOST -- HOST is name of the host to connect to, or its IP
2707 address. The symbol `local' specifies the local host. If specified
2708 for a server process, it must be a valid name or address for the local
2709 host, and only clients connecting to that address will be accepted.
2711 :service SERVICE -- SERVICE is name of the service desired, or an
2712 integer specifying a port number to connect to. If SERVICE is t,
2713 a random port number is selected for the server. (If Emacs was
2714 compiled with getaddrinfo, a port number can also be specified as a
2715 string, e.g. "80", as well as an integer. This is not portable.)
2717 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2718 stream type connection, `datagram' creates a datagram type connection,
2719 `seqpacket' creates a reliable datagram connection.
2721 :family FAMILY -- FAMILY is the address (and protocol) family for the
2722 service specified by HOST and SERVICE. The default (nil) is to use
2723 whatever address family (IPv4 or IPv6) that is defined for the host
2724 and port number specified by HOST and SERVICE. Other address families
2726 local -- for a local (i.e. UNIX) address specified by SERVICE.
2727 ipv4 -- use IPv4 address family only.
2728 ipv6 -- use IPv6 address family only.
2730 :local ADDRESS -- ADDRESS is the local address used for the connection.
2731 This parameter is ignored when opening a client process. When specified
2732 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2734 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2735 connection. This parameter is ignored when opening a stream server
2736 process. For a datagram server process, it specifies the initial
2737 setting of the remote datagram address. When specified for a client
2738 process, the FAMILY, HOST, and SERVICE args are ignored.
2740 The format of ADDRESS depends on the address family:
2741 - An IPv4 address is represented as an vector of integers [A B C D P]
2742 corresponding to numeric IP address A.B.C.D and port number P.
2743 - A local address is represented as a string with the address in the
2744 local address space.
2745 - An "unsupported family" address is represented by a cons (F . AV)
2746 where F is the family number and AV is a vector containing the socket
2747 address data with one element per address data byte. Do not rely on
2748 this format in portable code, as it may depend on implementation
2749 defined constants, data sizes, and data structure alignment.
2751 :coding CODING -- If CODING is a symbol, it specifies the coding
2752 system used for both reading and writing for this process. If CODING
2753 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2754 ENCODING is used for writing.
2756 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2757 return without waiting for the connection to complete; instead, the
2758 sentinel function will be called with second arg matching "open" (if
2759 successful) or "failed" when the connect completes. Default is to use
2760 a blocking connect (i.e. wait) for stream type connections.
2762 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2763 running when Emacs is exited.
2765 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2766 In the stopped state, a server process does not accept new
2767 connections, and a client process does not handle incoming traffic.
2768 The stopped state is cleared by `continue-process' and set by
2771 :filter FILTER -- Install FILTER as the process filter.
2773 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2774 process filter are multibyte, otherwise they are unibyte.
2775 If this keyword is not specified, the strings are multibyte if
2776 `default-enable-multibyte-characters' is non-nil.
2778 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2780 :log LOG -- Install LOG as the server process log function. This
2781 function is called when the server accepts a network connection from a
2782 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2783 is the server process, CLIENT is the new process for the connection,
2784 and MESSAGE is a string.
2786 :plist PLIST -- Install PLIST as the new process' initial plist.
2788 :server QLEN -- if QLEN is non-nil, create a server process for the
2789 specified FAMILY, SERVICE, and connection type (stream or datagram).
2790 If QLEN is an integer, it is used as the max. length of the server's
2791 pending connection queue (also known as the backlog); the default
2792 queue length is 5. Default is to create a client process.
2794 The following network options can be specified for this connection:
2796 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2797 :dontroute BOOL -- Only send to directly connected hosts.
2798 :keepalive BOOL -- Send keep-alive messages on network stream.
2799 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2800 :oobinline BOOL -- Place out-of-band data in receive data stream.
2801 :priority INT -- Set protocol defined priority for sent packets.
2802 :reuseaddr BOOL -- Allow reusing a recently used local address
2803 (this is allowed by default for a server process).
2804 :bindtodevice NAME -- bind to interface NAME. Using this may require
2805 special privileges on some systems.
2807 Consult the relevant system programmer's manual pages for more
2808 information on using these options.
2811 A server process will listen for and accept connections from clients.
2812 When a client connection is accepted, a new network process is created
2813 for the connection with the following parameters:
2815 - The client's process name is constructed by concatenating the server
2816 process' NAME and a client identification string.
2817 - If the FILTER argument is non-nil, the client process will not get a
2818 separate process buffer; otherwise, the client's process buffer is a newly
2819 created buffer named after the server process' BUFFER name or process
2820 NAME concatenated with the client identification string.
2821 - The connection type and the process filter and sentinel parameters are
2822 inherited from the server process' TYPE, FILTER and SENTINEL.
2823 - The client process' contact info is set according to the client's
2824 addressing information (typically an IP address and a port number).
2825 - The client process' plist is initialized from the server's plist.
2827 Notice that the FILTER and SENTINEL args are never used directly by
2828 the server process. Also, the BUFFER argument is not used directly by
2829 the server process, but via the optional :log function, accepted (and
2830 failed) connections may be logged in the server process' buffer.
2832 The original argument list, modified with the actual connection
2833 information, is available via the `process-contact' function.
2835 usage: (make-network-process &rest ARGS) */)
2836 (ptrdiff_t nargs
, Lisp_Object
*args
)
2839 Lisp_Object contact
;
2840 struct Lisp_Process
*p
;
2841 #ifdef HAVE_GETADDRINFO
2842 struct addrinfo ai
, *res
, *lres
;
2843 struct addrinfo hints
;
2844 const char *portstring
;
2846 #else /* HAVE_GETADDRINFO */
2847 struct _emacs_addrinfo
2853 struct sockaddr
*ai_addr
;
2854 struct _emacs_addrinfo
*ai_next
;
2856 #endif /* HAVE_GETADDRINFO */
2857 struct sockaddr_in address_in
;
2858 #ifdef HAVE_LOCAL_SOCKETS
2859 struct sockaddr_un address_un
;
2864 int s
= -1, outch
, inch
;
2865 struct gcpro gcpro1
;
2866 int count
= SPECPDL_INDEX ();
2868 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2870 Lisp_Object name
, buffer
, host
, service
, address
;
2871 Lisp_Object filter
, sentinel
;
2872 int is_non_blocking_client
= 0;
2873 int is_server
= 0, backlog
= 5;
2880 /* Save arguments for process-contact and clone-process. */
2881 contact
= Flist (nargs
, args
);
2885 /* Ensure socket support is loaded if available. */
2886 init_winsock (TRUE
);
2889 /* :type TYPE (nil: stream, datagram */
2890 tem
= Fplist_get (contact
, QCtype
);
2892 socktype
= SOCK_STREAM
;
2893 #ifdef DATAGRAM_SOCKETS
2894 else if (EQ (tem
, Qdatagram
))
2895 socktype
= SOCK_DGRAM
;
2897 #ifdef HAVE_SEQPACKET
2898 else if (EQ (tem
, Qseqpacket
))
2899 socktype
= SOCK_SEQPACKET
;
2902 error ("Unsupported connection type");
2905 tem
= Fplist_get (contact
, QCserver
);
2908 /* Don't support network sockets when non-blocking mode is
2909 not available, since a blocked Emacs is not useful. */
2910 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
2911 error ("Network servers not supported");
2915 backlog
= XINT (tem
);
2919 /* Make QCaddress an alias for :local (server) or :remote (client). */
2920 QCaddress
= is_server
? QClocal
: QCremote
;
2923 if (!is_server
&& socktype
!= SOCK_DGRAM
2924 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2926 #ifndef NON_BLOCKING_CONNECT
2927 error ("Non-blocking connect not supported");
2929 is_non_blocking_client
= 1;
2933 name
= Fplist_get (contact
, QCname
);
2934 buffer
= Fplist_get (contact
, QCbuffer
);
2935 filter
= Fplist_get (contact
, QCfilter
);
2936 sentinel
= Fplist_get (contact
, QCsentinel
);
2938 CHECK_STRING (name
);
2940 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2941 ai
.ai_socktype
= socktype
;
2946 /* :local ADDRESS or :remote ADDRESS */
2947 address
= Fplist_get (contact
, QCaddress
);
2948 if (!NILP (address
))
2950 host
= service
= Qnil
;
2952 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2953 error ("Malformed :address");
2954 ai
.ai_family
= family
;
2955 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2956 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2960 /* :family FAMILY -- nil (for Inet), local, or integer. */
2961 tem
= Fplist_get (contact
, QCfamily
);
2964 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
2970 #ifdef HAVE_LOCAL_SOCKETS
2971 else if (EQ (tem
, Qlocal
))
2975 else if (EQ (tem
, Qipv6
))
2978 else if (EQ (tem
, Qipv4
))
2980 else if (INTEGERP (tem
))
2981 family
= XINT (tem
);
2983 error ("Unknown address family");
2985 ai
.ai_family
= family
;
2987 /* :service SERVICE -- string, integer (port number), or t (random port). */
2988 service
= Fplist_get (contact
, QCservice
);
2990 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2991 host
= Fplist_get (contact
, QChost
);
2994 if (EQ (host
, Qlocal
))
2995 /* Depending on setup, "localhost" may map to different IPv4 and/or
2996 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
2997 host
= build_string ("127.0.0.1");
2998 CHECK_STRING (host
);
3001 #ifdef HAVE_LOCAL_SOCKETS
3002 if (family
== AF_LOCAL
)
3006 message (":family local ignores the :host \"%s\" property",
3008 contact
= Fplist_put (contact
, QChost
, Qnil
);
3011 CHECK_STRING (service
);
3012 memset (&address_un
, 0, sizeof address_un
);
3013 address_un
.sun_family
= AF_LOCAL
;
3014 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3015 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3016 ai
.ai_addrlen
= sizeof address_un
;
3021 /* Slow down polling to every ten seconds.
3022 Some kernels have a bug which causes retrying connect to fail
3023 after a connect. Polling can interfere with gethostbyname too. */
3024 #ifdef POLL_FOR_INPUT
3025 if (socktype
!= SOCK_DGRAM
)
3027 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3028 bind_polling_period (10);
3032 #ifdef HAVE_GETADDRINFO
3033 /* If we have a host, use getaddrinfo to resolve both host and service.
3034 Otherwise, use getservbyname to lookup the service. */
3038 /* SERVICE can either be a string or int.
3039 Convert to a C string for later use by getaddrinfo. */
3040 if (EQ (service
, Qt
))
3042 else if (INTEGERP (service
))
3044 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3045 portstring
= portbuf
;
3049 CHECK_STRING (service
);
3050 portstring
= SSDATA (service
);
3055 memset (&hints
, 0, sizeof (hints
));
3057 hints
.ai_family
= family
;
3058 hints
.ai_socktype
= socktype
;
3059 hints
.ai_protocol
= 0;
3061 #ifdef HAVE_RES_INIT
3065 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3067 #ifdef HAVE_GAI_STRERROR
3068 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3070 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3076 #endif /* HAVE_GETADDRINFO */
3078 /* We end up here if getaddrinfo is not defined, or in case no hostname
3079 has been specified (e.g. for a local server process). */
3081 if (EQ (service
, Qt
))
3083 else if (INTEGERP (service
))
3084 port
= htons ((unsigned short) XINT (service
));
3087 struct servent
*svc_info
;
3088 CHECK_STRING (service
);
3089 svc_info
= getservbyname (SSDATA (service
),
3090 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3092 error ("Unknown service: %s", SDATA (service
));
3093 port
= svc_info
->s_port
;
3096 memset (&address_in
, 0, sizeof address_in
);
3097 address_in
.sin_family
= family
;
3098 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3099 address_in
.sin_port
= port
;
3101 #ifndef HAVE_GETADDRINFO
3104 struct hostent
*host_info_ptr
;
3106 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3107 as it may `hang' Emacs for a very long time. */
3111 #ifdef HAVE_RES_INIT
3115 host_info_ptr
= gethostbyname (SDATA (host
));
3120 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3121 host_info_ptr
->h_length
);
3122 family
= host_info_ptr
->h_addrtype
;
3123 address_in
.sin_family
= family
;
3126 /* Attempt to interpret host as numeric inet address */
3128 unsigned long numeric_addr
;
3129 numeric_addr
= inet_addr (SSDATA (host
));
3130 if (numeric_addr
== -1)
3131 error ("Unknown host \"%s\"", SDATA (host
));
3133 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3134 sizeof (address_in
.sin_addr
));
3138 #endif /* not HAVE_GETADDRINFO */
3140 ai
.ai_family
= family
;
3141 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3142 ai
.ai_addrlen
= sizeof address_in
;
3146 /* Do this in case we never enter the for-loop below. */
3147 count1
= SPECPDL_INDEX ();
3150 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3159 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3166 #ifdef DATAGRAM_SOCKETS
3167 if (!is_server
&& socktype
== SOCK_DGRAM
)
3169 #endif /* DATAGRAM_SOCKETS */
3171 #ifdef NON_BLOCKING_CONNECT
3172 if (is_non_blocking_client
)
3175 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3177 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3189 /* Make us close S if quit. */
3190 record_unwind_protect (close_file_unwind
, make_number (s
));
3192 /* Parse network options in the arg list.
3193 We simply ignore anything which isn't a known option (including other keywords).
3194 An error is signaled if setting a known option fails. */
3195 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3196 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3200 /* Configure as a server socket. */
3202 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3203 explicit :reuseaddr key to override this. */
3204 #ifdef HAVE_LOCAL_SOCKETS
3205 if (family
!= AF_LOCAL
)
3207 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3210 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3211 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3214 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3215 report_file_error ("Cannot bind server socket", Qnil
);
3217 #ifdef HAVE_GETSOCKNAME
3218 if (EQ (service
, Qt
))
3220 struct sockaddr_in sa1
;
3221 socklen_t len1
= sizeof (sa1
);
3222 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3224 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3225 service
= make_number (ntohs (sa1
.sin_port
));
3226 contact
= Fplist_put (contact
, QCservice
, service
);
3231 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3232 report_file_error ("Cannot listen on server socket", Qnil
);
3240 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3243 if (ret
== 0 || xerrno
== EISCONN
)
3245 /* The unwind-protect will be discarded afterwards.
3246 Likewise for immediate_quit. */
3250 #ifdef NON_BLOCKING_CONNECT
3252 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3256 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3263 if (xerrno
== EINTR
)
3265 /* Unlike most other syscalls connect() cannot be called
3266 again. (That would return EALREADY.) The proper way to
3267 wait for completion is select(). */
3275 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3282 report_file_error ("select failed", Qnil
);
3286 len
= sizeof xerrno
;
3287 eassert (FD_ISSET (s
, &fdset
));
3288 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3289 report_file_error ("getsockopt failed", Qnil
);
3291 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3295 #endif /* !WINDOWSNT */
3299 /* Discard the unwind protect closing S. */
3300 specpdl_ptr
= specpdl
+ count1
;
3305 if (xerrno
== EINTR
)
3312 #ifdef DATAGRAM_SOCKETS
3313 if (socktype
== SOCK_DGRAM
)
3315 if (datagram_address
[s
].sa
)
3317 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3318 datagram_address
[s
].len
= lres
->ai_addrlen
;
3322 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3323 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3326 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3327 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3328 conv_lisp_to_sockaddr (rfamily
, remote
,
3329 datagram_address
[s
].sa
, rlen
);
3333 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3336 contact
= Fplist_put (contact
, QCaddress
,
3337 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3338 #ifdef HAVE_GETSOCKNAME
3341 struct sockaddr_in sa1
;
3342 socklen_t len1
= sizeof (sa1
);
3343 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3344 contact
= Fplist_put (contact
, QClocal
,
3345 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3352 #ifdef HAVE_GETADDRINFO
3361 /* Discard the unwind protect for closing S, if any. */
3362 specpdl_ptr
= specpdl
+ count1
;
3364 /* Unwind bind_polling_period and request_sigio. */
3365 unbind_to (count
, Qnil
);
3369 /* If non-blocking got this far - and failed - assume non-blocking is
3370 not supported after all. This is probably a wrong assumption, but
3371 the normal blocking calls to open-network-stream handles this error
3373 if (is_non_blocking_client
)
3378 report_file_error ("make server process failed", contact
);
3380 report_file_error ("make client process failed", contact
);
3387 buffer
= Fget_buffer_create (buffer
);
3388 proc
= make_process (name
);
3390 chan_process
[inch
] = proc
;
3393 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3396 fcntl (inch
, F_SETFL
, O_NDELAY
);
3400 p
= XPROCESS (proc
);
3402 p
->childp
= contact
;
3403 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3407 p
->sentinel
= sentinel
;
3409 p
->log
= Fplist_get (contact
, QClog
);
3410 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3411 p
->kill_without_query
= 1;
3412 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3417 if (is_server
&& socktype
!= SOCK_DGRAM
)
3418 p
->status
= Qlisten
;
3420 /* Make the process marker point into the process buffer (if any). */
3421 if (BUFFERP (buffer
))
3422 set_marker_both (p
->mark
, buffer
,
3423 BUF_ZV (XBUFFER (buffer
)),
3424 BUF_ZV_BYTE (XBUFFER (buffer
)));
3426 #ifdef NON_BLOCKING_CONNECT
3427 if (is_non_blocking_client
)
3429 /* We may get here if connect did succeed immediately. However,
3430 in that case, we still need to signal this like a non-blocking
3432 p
->status
= Qconnect
;
3433 if (!FD_ISSET (inch
, &connect_wait_mask
))
3435 FD_SET (inch
, &connect_wait_mask
);
3436 FD_SET (inch
, &write_mask
);
3437 num_pending_connects
++;
3442 /* A server may have a client filter setting of Qt, but it must
3443 still listen for incoming connects unless it is stopped. */
3444 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3445 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3447 FD_SET (inch
, &input_wait_mask
);
3448 FD_SET (inch
, &non_keyboard_wait_mask
);
3451 if (inch
> max_process_desc
)
3452 max_process_desc
= inch
;
3454 tem
= Fplist_member (contact
, QCcoding
);
3455 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3456 tem
= Qnil
; /* No error message (too late!). */
3459 /* Setup coding systems for communicating with the network stream. */
3460 struct gcpro inner_gcpro1
;
3461 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3462 Lisp_Object coding_systems
= Qt
;
3463 Lisp_Object fargs
[5], val
;
3467 val
= XCAR (XCDR (tem
));
3471 else if (!NILP (Vcoding_system_for_read
))
3472 val
= Vcoding_system_for_read
;
3473 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3474 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3475 /* We dare not decode end-of-line format by setting VAL to
3476 Qraw_text, because the existing Emacs Lisp libraries
3477 assume that they receive bare code including a sequene of
3482 if (NILP (host
) || NILP (service
))
3483 coding_systems
= Qnil
;
3486 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3487 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3488 GCPRO1_VAR (proc
, inner_gcpro
);
3489 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3490 UNGCPRO_VAR (inner_gcpro
);
3492 if (CONSP (coding_systems
))
3493 val
= XCAR (coding_systems
);
3494 else if (CONSP (Vdefault_process_coding_system
))
3495 val
= XCAR (Vdefault_process_coding_system
);
3499 p
->decode_coding_system
= val
;
3503 val
= XCAR (XCDR (tem
));
3507 else if (!NILP (Vcoding_system_for_write
))
3508 val
= Vcoding_system_for_write
;
3509 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3513 if (EQ (coding_systems
, Qt
))
3515 if (NILP (host
) || NILP (service
))
3516 coding_systems
= Qnil
;
3519 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3520 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3521 GCPRO1_VAR (proc
, inner_gcpro
);
3522 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3523 UNGCPRO_VAR (inner_gcpro
);
3526 if (CONSP (coding_systems
))
3527 val
= XCDR (coding_systems
);
3528 else if (CONSP (Vdefault_process_coding_system
))
3529 val
= XCDR (Vdefault_process_coding_system
);
3533 p
->encode_coding_system
= val
;
3535 setup_process_coding_systems (proc
);
3537 p
->decoding_buf
= empty_unibyte_string
;
3538 p
->decoding_carryover
= 0;
3539 p
->encoding_buf
= empty_unibyte_string
;
3541 p
->inherit_coding_system_flag
3542 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3549 #if defined(HAVE_NET_IF_H)
3552 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3553 doc
: /* Return an alist of all network interfaces and their network address.
3554 Each element is a cons, the car of which is a string containing the
3555 interface name, and the cdr is the network address in internal
3556 format; see the description of ADDRESS in `make-network-process'. */)
3559 struct ifconf ifconf
;
3560 struct ifreq
*ifreqs
= NULL
;
3565 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3571 buf_size
= ifaces
* sizeof (ifreqs
[0]);
3572 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3579 ifconf
.ifc_len
= buf_size
;
3580 ifconf
.ifc_req
= ifreqs
;
3581 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3587 if (ifconf
.ifc_len
== buf_size
)
3591 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3594 while (--ifaces
>= 0)
3596 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3597 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3598 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3600 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3601 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3602 res
= Fcons (Fcons (build_string (namebuf
),
3603 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3604 sizeof (struct sockaddr
))),
3610 #endif /* SIOCGIFCONF */
3612 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3616 const char *flag_sym
;
3619 static const struct ifflag_def ifflag_table
[] = {
3623 #ifdef IFF_BROADCAST
3624 { IFF_BROADCAST
, "broadcast" },
3627 { IFF_DEBUG
, "debug" },
3630 { IFF_LOOPBACK
, "loopback" },
3632 #ifdef IFF_POINTOPOINT
3633 { IFF_POINTOPOINT
, "pointopoint" },
3636 { IFF_RUNNING
, "running" },
3639 { IFF_NOARP
, "noarp" },
3642 { IFF_PROMISC
, "promisc" },
3644 #ifdef IFF_NOTRAILERS
3645 { IFF_NOTRAILERS
, "notrailers" },
3648 { IFF_ALLMULTI
, "allmulti" },
3651 { IFF_MASTER
, "master" },
3654 { IFF_SLAVE
, "slave" },
3656 #ifdef IFF_MULTICAST
3657 { IFF_MULTICAST
, "multicast" },
3660 { IFF_PORTSEL
, "portsel" },
3662 #ifdef IFF_AUTOMEDIA
3663 { IFF_AUTOMEDIA
, "automedia" },
3666 { IFF_DYNAMIC
, "dynamic" },
3669 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3672 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3675 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3678 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3681 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3686 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3687 doc
: /* Return information about network interface named IFNAME.
3688 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3689 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3690 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3691 FLAGS is the current flags of the interface. */)
3692 (Lisp_Object ifname
)
3695 Lisp_Object res
= Qnil
;
3700 CHECK_STRING (ifname
);
3702 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3703 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3705 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3710 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3711 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3713 int flags
= rq
.ifr_flags
;
3714 const struct ifflag_def
*fp
;
3718 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3720 if (flags
& fp
->flag_bit
)
3722 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3723 flags
-= fp
->flag_bit
;
3726 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3730 elt
= Fcons (make_number (fnum
), elt
);
3735 res
= Fcons (elt
, res
);
3738 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3739 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3741 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3742 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3746 for (n
= 0; n
< 6; n
++)
3747 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3748 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3751 res
= Fcons (elt
, res
);
3754 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3755 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3758 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3759 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3761 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3765 res
= Fcons (elt
, res
);
3768 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3769 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3772 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3775 res
= Fcons (elt
, res
);
3778 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3779 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3782 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3785 res
= Fcons (elt
, res
);
3789 return any
? res
: Qnil
;
3792 #endif /* defined(HAVE_NET_IF_H) */
3794 /* Turn off input and output for process PROC. */
3797 deactivate_process (Lisp_Object proc
)
3799 register int inchannel
, outchannel
;
3800 register struct Lisp_Process
*p
= XPROCESS (proc
);
3802 inchannel
= p
->infd
;
3803 outchannel
= p
->outfd
;
3805 #ifdef ADAPTIVE_READ_BUFFERING
3806 if (p
->read_output_delay
> 0)
3808 if (--process_output_delay_count
< 0)
3809 process_output_delay_count
= 0;
3810 p
->read_output_delay
= 0;
3811 p
->read_output_skip
= 0;
3817 /* Beware SIGCHLD hereabouts. */
3818 flush_pending_output (inchannel
);
3819 emacs_close (inchannel
);
3820 if (outchannel
>= 0 && outchannel
!= inchannel
)
3821 emacs_close (outchannel
);
3825 #ifdef DATAGRAM_SOCKETS
3826 if (DATAGRAM_CHAN_P (inchannel
))
3828 xfree (datagram_address
[inchannel
].sa
);
3829 datagram_address
[inchannel
].sa
= 0;
3830 datagram_address
[inchannel
].len
= 0;
3833 chan_process
[inchannel
] = Qnil
;
3834 FD_CLR (inchannel
, &input_wait_mask
);
3835 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3836 #ifdef NON_BLOCKING_CONNECT
3837 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3839 FD_CLR (inchannel
, &connect_wait_mask
);
3840 FD_CLR (inchannel
, &write_mask
);
3841 if (--num_pending_connects
< 0)
3845 if (inchannel
== max_process_desc
)
3848 /* We just closed the highest-numbered process input descriptor,
3849 so recompute the highest-numbered one now. */
3850 max_process_desc
= 0;
3851 for (i
= 0; i
< MAXDESC
; i
++)
3852 if (!NILP (chan_process
[i
]))
3853 max_process_desc
= i
;
3859 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3861 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3862 It is read into the process' buffers or given to their filter functions.
3863 Non-nil arg PROCESS means do not return until some output has been received
3866 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3867 and milliseconds to wait; return after that much time whether or not
3868 there is any subprocess output. If SECONDS is a floating point number,
3869 it specifies a fractional number of seconds to wait.
3870 The MILLISEC argument is obsolete and should be avoided.
3872 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3873 from PROCESS, suspending reading output from other processes.
3874 If JUST-THIS-ONE is an integer, don't run any timers either.
3875 Return non-nil if we received any output before the timeout expired. */)
3876 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3878 int secs
, usecs
= 0;
3880 if (! NILP (process
))
3881 CHECK_PROCESS (process
);
3883 just_this_one
= Qnil
;
3885 if (!NILP (millisec
))
3886 { /* Obsolete calling convention using integers rather than floats. */
3887 CHECK_NUMBER (millisec
);
3889 seconds
= make_float (XINT (millisec
) / 1000.0);
3892 CHECK_NUMBER (seconds
);
3893 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3897 if (!NILP (seconds
))
3899 if (INTEGERP (seconds
))
3900 secs
= XINT (seconds
);
3901 else if (FLOATP (seconds
))
3903 double timeout
= XFLOAT_DATA (seconds
);
3904 secs
= (int) timeout
;
3905 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3908 wrong_type_argument (Qnumberp
, seconds
);
3910 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3911 secs
= -1, usecs
= 0;
3914 secs
= NILP (process
) ? -1 : 0;
3917 (wait_reading_process_output (secs
, usecs
, 0, 0,
3919 !NILP (process
) ? XPROCESS (process
) : NULL
,
3920 NILP (just_this_one
) ? 0 :
3921 !INTEGERP (just_this_one
) ? 1 : -1)
3925 /* Accept a connection for server process SERVER on CHANNEL. */
3927 static int connect_counter
= 0;
3930 server_accept_connection (Lisp_Object server
, int channel
)
3932 Lisp_Object proc
, caller
, name
, buffer
;
3933 Lisp_Object contact
, host
, service
;
3934 struct Lisp_Process
*ps
= XPROCESS (server
);
3935 struct Lisp_Process
*p
;
3939 struct sockaddr_in in
;
3941 struct sockaddr_in6 in6
;
3943 #ifdef HAVE_LOCAL_SOCKETS
3944 struct sockaddr_un un
;
3947 socklen_t len
= sizeof saddr
;
3949 s
= accept (channel
, &saddr
.sa
, &len
);
3958 if (code
== EWOULDBLOCK
)
3962 if (!NILP (ps
->log
))
3963 call3 (ps
->log
, server
, Qnil
,
3964 concat3 (build_string ("accept failed with code"),
3965 Fnumber_to_string (make_number (code
)),
3966 build_string ("\n")));
3972 /* Setup a new process to handle the connection. */
3974 /* Generate a unique identification of the caller, and build contact
3975 information for this process. */
3978 switch (saddr
.sa
.sa_family
)
3982 Lisp_Object args
[5];
3983 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3984 args
[0] = build_string ("%d.%d.%d.%d");
3985 args
[1] = make_number (*ip
++);
3986 args
[2] = make_number (*ip
++);
3987 args
[3] = make_number (*ip
++);
3988 args
[4] = make_number (*ip
++);
3989 host
= Fformat (5, args
);
3990 service
= make_number (ntohs (saddr
.in
.sin_port
));
3992 args
[0] = build_string (" <%s:%d>");
3995 caller
= Fformat (3, args
);
4002 Lisp_Object args
[9];
4003 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4005 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4006 for (i
= 0; i
< 8; i
++)
4007 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4008 host
= Fformat (9, args
);
4009 service
= make_number (ntohs (saddr
.in
.sin_port
));
4011 args
[0] = build_string (" <[%s]:%d>");
4014 caller
= Fformat (3, args
);
4019 #ifdef HAVE_LOCAL_SOCKETS
4023 caller
= Fnumber_to_string (make_number (connect_counter
));
4024 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4028 /* Create a new buffer name for this process if it doesn't have a
4029 filter. The new buffer name is based on the buffer name or
4030 process name of the server process concatenated with the caller
4033 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4037 buffer
= ps
->buffer
;
4039 buffer
= Fbuffer_name (buffer
);
4044 buffer
= concat2 (buffer
, caller
);
4045 buffer
= Fget_buffer_create (buffer
);
4049 /* Generate a unique name for the new server process. Combine the
4050 server process name with the caller identification. */
4052 name
= concat2 (ps
->name
, caller
);
4053 proc
= make_process (name
);
4055 chan_process
[s
] = proc
;
4058 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4061 fcntl (s
, F_SETFL
, O_NDELAY
);
4065 p
= XPROCESS (proc
);
4067 /* Build new contact information for this setup. */
4068 contact
= Fcopy_sequence (ps
->childp
);
4069 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4070 contact
= Fplist_put (contact
, QChost
, host
);
4071 if (!NILP (service
))
4072 contact
= Fplist_put (contact
, QCservice
, service
);
4073 contact
= Fplist_put (contact
, QCremote
,
4074 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4075 #ifdef HAVE_GETSOCKNAME
4077 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4078 contact
= Fplist_put (contact
, QClocal
,
4079 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4082 p
->childp
= contact
;
4083 p
->plist
= Fcopy_sequence (ps
->plist
);
4087 p
->sentinel
= ps
->sentinel
;
4088 p
->filter
= ps
->filter
;
4095 /* Client processes for accepted connections are not stopped initially. */
4096 if (!EQ (p
->filter
, Qt
))
4098 FD_SET (s
, &input_wait_mask
);
4099 FD_SET (s
, &non_keyboard_wait_mask
);
4102 if (s
> max_process_desc
)
4103 max_process_desc
= s
;
4105 /* Setup coding system for new process based on server process.
4106 This seems to be the proper thing to do, as the coding system
4107 of the new process should reflect the settings at the time the
4108 server socket was opened; not the current settings. */
4110 p
->decode_coding_system
= ps
->decode_coding_system
;
4111 p
->encode_coding_system
= ps
->encode_coding_system
;
4112 setup_process_coding_systems (proc
);
4114 p
->decoding_buf
= empty_unibyte_string
;
4115 p
->decoding_carryover
= 0;
4116 p
->encoding_buf
= empty_unibyte_string
;
4118 p
->inherit_coding_system_flag
4119 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4121 if (!NILP (ps
->log
))
4122 call3 (ps
->log
, server
, proc
,
4123 concat3 (build_string ("accept from "),
4124 (STRINGP (host
) ? host
: build_string ("-")),
4125 build_string ("\n")));
4127 if (!NILP (p
->sentinel
))
4128 exec_sentinel (proc
,
4129 concat3 (build_string ("open from "),
4130 (STRINGP (host
) ? host
: build_string ("-")),
4131 build_string ("\n")));
4134 /* This variable is different from waiting_for_input in keyboard.c.
4135 It is used to communicate to a lisp process-filter/sentinel (via the
4136 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4137 for user-input when that process-filter was called.
4138 waiting_for_input cannot be used as that is by definition 0 when
4139 lisp code is being evalled.
4140 This is also used in record_asynch_buffer_change.
4141 For that purpose, this must be 0
4142 when not inside wait_reading_process_output. */
4143 static int waiting_for_user_input_p
;
4146 wait_reading_process_output_unwind (Lisp_Object data
)
4148 waiting_for_user_input_p
= XINT (data
);
4152 /* This is here so breakpoints can be put on it. */
4154 wait_reading_process_output_1 (void)
4158 /* Use a wrapper around select to work around a bug in gdb 5.3.
4159 Normally, the wrapper is optimized away by inlining.
4161 If emacs is stopped inside select, the gdb backtrace doesn't
4162 show the function which called select, so it is practically
4163 impossible to step through wait_reading_process_output. */
4167 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4169 return select (n
, rfd
, wfd
, xfd
, tmo
);
4171 #define select select_wrapper
4174 /* Read and dispose of subprocess output while waiting for timeout to
4175 elapse and/or keyboard input to be available.
4178 timeout in seconds, or
4179 zero for no limit, or
4180 -1 means gobble data immediately available but don't wait for any.
4183 an additional duration to wait, measured in microseconds.
4184 If this is nonzero and time_limit is 0, then the timeout
4185 consists of MICROSECS only.
4187 READ_KBD is a lisp value:
4188 0 to ignore keyboard input, or
4189 1 to return when input is available, or
4190 -1 meaning caller will actually read the input, so don't throw to
4191 the quit handler, or
4193 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4194 output that arrives.
4196 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4197 (and gobble terminal input into the buffer if any arrives).
4199 If WAIT_PROC is specified, wait until something arrives from that
4200 process. The return value is true if we read some input from
4203 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4204 (suspending output from other processes). A negative value
4205 means don't run any timers either.
4207 If WAIT_PROC is specified, then the function returns true if we
4208 received input from that process before the timeout elapsed.
4209 Otherwise, return true if we received input from any process. */
4212 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4214 Lisp_Object wait_for_cell
,
4215 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4217 register int channel
, nfds
;
4218 SELECT_TYPE Available
;
4219 SELECT_TYPE Writeok
;
4221 int check_delay
, no_avail
;
4224 EMACS_TIME timeout
, end_time
;
4225 int wait_channel
= -1;
4226 int got_some_input
= 0;
4227 int count
= SPECPDL_INDEX ();
4229 FD_ZERO (&Available
);
4232 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4233 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4234 message ("Blocking call to accept-process-output with quit inhibited!!");
4236 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4237 if (wait_proc
!= NULL
)
4238 wait_channel
= wait_proc
->infd
;
4240 record_unwind_protect (wait_reading_process_output_unwind
,
4241 make_number (waiting_for_user_input_p
));
4242 waiting_for_user_input_p
= read_kbd
;
4244 /* Since we may need to wait several times,
4245 compute the absolute time to return at. */
4246 if (time_limit
|| microsecs
)
4248 EMACS_GET_TIME (end_time
);
4249 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4250 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4255 int timeout_reduced_for_timers
= 0;
4257 /* If calling from keyboard input, do not quit
4258 since we want to return C-g as an input character.
4259 Otherwise, do pending quit if requested. */
4264 process_pending_signals ();
4267 /* Exit now if the cell we're waiting for became non-nil. */
4268 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4271 /* Compute time from now till when time limit is up */
4272 /* Exit if already run out */
4273 if (time_limit
== -1)
4275 /* -1 specified for timeout means
4276 gobble output available now
4277 but don't wait at all. */
4279 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4281 else if (time_limit
|| microsecs
)
4283 EMACS_GET_TIME (timeout
);
4284 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4285 if (EMACS_TIME_NEG_P (timeout
))
4290 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4293 /* Normally we run timers here.
4294 But not if wait_for_cell; in those cases,
4295 the wait is supposed to be short,
4296 and those callers cannot handle running arbitrary Lisp code here. */
4297 if (NILP (wait_for_cell
)
4298 && just_wait_proc
>= 0)
4300 EMACS_TIME timer_delay
;
4304 int old_timers_run
= timers_run
;
4305 struct buffer
*old_buffer
= current_buffer
;
4306 Lisp_Object old_window
= selected_window
;
4308 timer_delay
= timer_check ();
4310 /* If a timer has run, this might have changed buffers
4311 an alike. Make read_key_sequence aware of that. */
4312 if (timers_run
!= old_timers_run
4313 && (old_buffer
!= current_buffer
4314 || !EQ (old_window
, selected_window
))
4315 && waiting_for_user_input_p
== -1)
4316 record_asynch_buffer_change ();
4318 if (timers_run
!= old_timers_run
&& do_display
)
4319 /* We must retry, since a timer may have requeued itself
4320 and that could alter the time_delay. */
4321 redisplay_preserve_echo_area (9);
4325 while (!detect_input_pending ());
4327 /* If there is unread keyboard input, also return. */
4329 && requeued_events_pending_p ())
4332 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4334 EMACS_TIME difference
;
4335 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4336 if (EMACS_TIME_NEG_P (difference
))
4338 timeout
= timer_delay
;
4339 timeout_reduced_for_timers
= 1;
4342 /* If time_limit is -1, we are not going to wait at all. */
4343 else if (time_limit
!= -1)
4345 /* This is so a breakpoint can be put here. */
4346 wait_reading_process_output_1 ();
4350 /* Cause C-g and alarm signals to take immediate action,
4351 and cause input available signals to zero out timeout.
4353 It is important that we do this before checking for process
4354 activity. If we get a SIGCHLD after the explicit checks for
4355 process activity, timeout is the only way we will know. */
4357 set_waiting_for_input (&timeout
);
4359 /* If status of something has changed, and no input is
4360 available, notify the user of the change right away. After
4361 this explicit check, we'll let the SIGCHLD handler zap
4362 timeout to get our attention. */
4363 if (update_tick
!= process_tick
)
4368 if (kbd_on_hold_p ())
4371 Atemp
= input_wait_mask
;
4374 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4375 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4377 #ifdef NON_BLOCKING_CONNECT
4378 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4382 (SELECT_TYPE
*)0, &timeout
)
4385 /* It's okay for us to do this and then continue with
4386 the loop, since timeout has already been zeroed out. */
4387 clear_waiting_for_input ();
4388 status_notify (NULL
);
4389 if (do_display
) redisplay_preserve_echo_area (13);
4393 /* Don't wait for output from a non-running process. Just
4394 read whatever data has already been received. */
4395 if (wait_proc
&& wait_proc
->raw_status_new
)
4396 update_status (wait_proc
);
4398 && ! EQ (wait_proc
->status
, Qrun
)
4399 && ! EQ (wait_proc
->status
, Qconnect
))
4401 int nread
, total_nread
= 0;
4403 clear_waiting_for_input ();
4404 XSETPROCESS (proc
, wait_proc
);
4406 /* Read data from the process, until we exhaust it. */
4407 while (wait_proc
->infd
>= 0)
4409 nread
= read_process_output (proc
, wait_proc
->infd
);
4416 total_nread
+= nread
;
4420 else if (nread
== -1 && EIO
== errno
)
4424 else if (nread
== -1 && EAGAIN
== errno
)
4428 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4432 if (total_nread
> 0 && do_display
)
4433 redisplay_preserve_echo_area (10);
4438 /* Wait till there is something to do */
4440 if (wait_proc
&& just_wait_proc
)
4442 if (wait_proc
->infd
< 0) /* Terminated */
4444 FD_SET (wait_proc
->infd
, &Available
);
4448 else if (!NILP (wait_for_cell
))
4450 Available
= non_process_wait_mask
;
4457 Available
= non_keyboard_wait_mask
;
4459 Available
= input_wait_mask
;
4460 Writeok
= write_mask
;
4461 #ifdef SELECT_CANT_DO_WRITE_MASK
4466 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4469 /* If frame size has changed or the window is newly mapped,
4470 redisplay now, before we start to wait. There is a race
4471 condition here; if a SIGIO arrives between now and the select
4472 and indicates that a frame is trashed, the select may block
4473 displaying a trashed screen. */
4474 if (frame_garbaged
&& do_display
)
4476 clear_waiting_for_input ();
4477 redisplay_preserve_echo_area (11);
4479 set_waiting_for_input (&timeout
);
4482 /* Skip the `select' call if input is available and we're
4483 waiting for keyboard input or a cell change (which can be
4484 triggered by processing X events). In the latter case, set
4485 nfds to 1 to avoid breaking the loop. */
4487 if ((read_kbd
|| !NILP (wait_for_cell
))
4488 && detect_input_pending ())
4490 nfds
= read_kbd
? 0 : 1;
4497 #ifdef ADAPTIVE_READ_BUFFERING
4498 /* Set the timeout for adaptive read buffering if any
4499 process has non-zero read_output_skip and non-zero
4500 read_output_delay, and we are not reading output for a
4501 specific wait_channel. It is not executed if
4502 Vprocess_adaptive_read_buffering is nil. */
4503 if (process_output_skip
&& check_delay
> 0)
4505 int usecs
= EMACS_USECS (timeout
);
4506 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4507 usecs
= READ_OUTPUT_DELAY_MAX
;
4508 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4510 proc
= chan_process
[channel
];
4513 /* Find minimum non-zero read_output_delay among the
4514 processes with non-zero read_output_skip. */
4515 if (XPROCESS (proc
)->read_output_delay
> 0)
4518 if (!XPROCESS (proc
)->read_output_skip
)
4520 FD_CLR (channel
, &Available
);
4521 XPROCESS (proc
)->read_output_skip
= 0;
4522 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4523 usecs
= XPROCESS (proc
)->read_output_delay
;
4526 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4527 process_output_skip
= 0;
4530 #if defined (USE_GTK) || defined (HAVE_GCONF)
4532 #elif defined (HAVE_NS)
4537 (max (max_process_desc
, max_input_desc
) + 1,
4539 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4540 (SELECT_TYPE
*)0, &timeout
);
4543 /* GnuTLS buffers data internally. In lowat mode it leaves
4544 some data in the TCP buffers so that select works, but
4545 with custom pull/push functions we need to check if some
4546 data is available in the buffers manually. */
4548 wait_proc
&& wait_proc
->gnutls_p
/* Check for valid process. */
4549 /* Do we have pending data? */
4550 && emacs_gnutls_record_check_pending (wait_proc
->gnutls_state
) > 0)
4553 /* Set to Available. */
4554 FD_SET (wait_proc
->infd
, &Available
);
4561 /* Make C-g and alarm signals set flags again */
4562 clear_waiting_for_input ();
4564 /* If we woke up due to SIGWINCH, actually change size now. */
4565 do_pending_window_change (0);
4567 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4568 /* We wanted the full specified time, so return now. */
4572 if (xerrno
== EINTR
)
4574 else if (xerrno
== EBADF
)
4577 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4578 the child's closure of the pts gives the parent a SIGHUP, and
4579 the ptc file descriptor is automatically closed,
4580 yielding EBADF here or at select() call above.
4581 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4582 in m/ibmrt-aix.h), and here we just ignore the select error.
4583 Cleanup occurs c/o status_notify after SIGCLD. */
4584 no_avail
= 1; /* Cannot depend on values returned */
4590 error ("select error: %s", emacs_strerror (xerrno
));
4595 FD_ZERO (&Available
);
4599 #if 0 /* When polling is used, interrupt_input is 0,
4600 so get_input_pending should read the input.
4601 So this should not be needed. */
4602 /* If we are using polling for input,
4603 and we see input available, make it get read now.
4604 Otherwise it might not actually get read for a second.
4605 And on hpux, since we turn off polling in wait_reading_process_output,
4606 it might never get read at all if we don't spend much time
4607 outside of wait_reading_process_output. */
4608 if (read_kbd
&& interrupt_input
4609 && keyboard_bit_set (&Available
)
4610 && input_polling_used ())
4611 kill (getpid (), SIGALRM
);
4614 /* Check for keyboard input */
4615 /* If there is any, return immediately
4616 to give it higher priority than subprocesses */
4620 int old_timers_run
= timers_run
;
4621 struct buffer
*old_buffer
= current_buffer
;
4622 Lisp_Object old_window
= selected_window
;
4625 if (detect_input_pending_run_timers (do_display
))
4627 swallow_events (do_display
);
4628 if (detect_input_pending_run_timers (do_display
))
4632 /* If a timer has run, this might have changed buffers
4633 an alike. Make read_key_sequence aware of that. */
4634 if (timers_run
!= old_timers_run
4635 && waiting_for_user_input_p
== -1
4636 && (old_buffer
!= current_buffer
4637 || !EQ (old_window
, selected_window
)))
4638 record_asynch_buffer_change ();
4644 /* If there is unread keyboard input, also return. */
4646 && requeued_events_pending_p ())
4649 /* If we are not checking for keyboard input now,
4650 do process events (but don't run any timers).
4651 This is so that X events will be processed.
4652 Otherwise they may have to wait until polling takes place.
4653 That would causes delays in pasting selections, for example.
4655 (We used to do this only if wait_for_cell.) */
4656 if (read_kbd
== 0 && detect_input_pending ())
4658 swallow_events (do_display
);
4659 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4660 if (detect_input_pending ())
4665 /* Exit now if the cell we're waiting for became non-nil. */
4666 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4670 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4671 go read it. This can happen with X on BSD after logging out.
4672 In that case, there really is no input and no SIGIO,
4673 but select says there is input. */
4675 if (read_kbd
&& interrupt_input
4676 && keyboard_bit_set (&Available
) && ! noninteractive
)
4677 kill (getpid (), SIGIO
);
4681 got_some_input
|= nfds
> 0;
4683 /* If checking input just got us a size-change event from X,
4684 obey it now if we should. */
4685 if (read_kbd
|| ! NILP (wait_for_cell
))
4686 do_pending_window_change (0);
4688 /* Check for data from a process. */
4689 if (no_avail
|| nfds
== 0)
4692 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4694 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4695 if (FD_ISSET (channel
, &Available
)
4697 && (d
->condition
& FOR_READ
) != 0)
4698 d
->func (channel
, d
->data
, 1);
4699 if (FD_ISSET (channel
, &write_mask
)
4701 && (d
->condition
& FOR_WRITE
) != 0)
4702 d
->func (channel
, d
->data
, 0);
4705 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4707 if (FD_ISSET (channel
, &Available
)
4708 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4709 && !FD_ISSET (channel
, &non_process_wait_mask
))
4713 /* If waiting for this channel, arrange to return as
4714 soon as no more input to be processed. No more
4716 if (wait_channel
== channel
)
4722 proc
= chan_process
[channel
];
4726 /* If this is a server stream socket, accept connection. */
4727 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4729 server_accept_connection (proc
, channel
);
4733 /* Read data from the process, starting with our
4734 buffered-ahead character if we have one. */
4736 nread
= read_process_output (proc
, channel
);
4739 /* Since read_process_output can run a filter,
4740 which can call accept-process-output,
4741 don't try to read from any other processes
4742 before doing the select again. */
4743 FD_ZERO (&Available
);
4746 redisplay_preserve_echo_area (12);
4749 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4752 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4753 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4755 else if (nread
== -1 && errno
== EAGAIN
)
4759 else if (nread
== -1 && errno
== EAGAIN
)
4761 /* Note that we cannot distinguish between no input
4762 available now and a closed pipe.
4763 With luck, a closed pipe will be accompanied by
4764 subprocess termination and SIGCHLD. */
4765 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4767 #endif /* O_NDELAY */
4768 #endif /* O_NONBLOCK */
4770 /* On some OSs with ptys, when the process on one end of
4771 a pty exits, the other end gets an error reading with
4772 errno = EIO instead of getting an EOF (0 bytes read).
4773 Therefore, if we get an error reading and errno =
4774 EIO, just continue, because the child process has
4775 exited and should clean itself up soon (e.g. when we
4778 However, it has been known to happen that the SIGCHLD
4779 got lost. So raise the signal again just in case.
4781 else if (nread
== -1 && errno
== EIO
)
4783 /* Clear the descriptor now, so we only raise the
4784 signal once. Don't do this if `process' is only
4786 if (XPROCESS (proc
)->pid
!= -2)
4788 FD_CLR (channel
, &input_wait_mask
);
4789 FD_CLR (channel
, &non_keyboard_wait_mask
);
4791 kill (getpid (), SIGCHLD
);
4794 #endif /* HAVE_PTYS */
4795 /* If we can detect process termination, don't consider the process
4796 gone just because its pipe is closed. */
4798 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4803 /* Preserve status of processes already terminated. */
4804 XPROCESS (proc
)->tick
= ++process_tick
;
4805 deactivate_process (proc
);
4806 if (XPROCESS (proc
)->raw_status_new
)
4807 update_status (XPROCESS (proc
));
4808 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4809 XPROCESS (proc
)->status
4810 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4813 #ifdef NON_BLOCKING_CONNECT
4814 if (FD_ISSET (channel
, &Writeok
)
4815 && FD_ISSET (channel
, &connect_wait_mask
))
4817 struct Lisp_Process
*p
;
4819 FD_CLR (channel
, &connect_wait_mask
);
4820 FD_CLR (channel
, &write_mask
);
4821 if (--num_pending_connects
< 0)
4824 proc
= chan_process
[channel
];
4828 p
= XPROCESS (proc
);
4831 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4832 So only use it on systems where it is known to work. */
4834 socklen_t xlen
= sizeof (xerrno
);
4835 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4840 struct sockaddr pname
;
4841 int pnamelen
= sizeof (pname
);
4843 /* If connection failed, getpeername will fail. */
4845 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4847 /* Obtain connect failure code through error slippage. */
4850 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4857 p
->tick
= ++process_tick
;
4858 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4859 deactivate_process (proc
);
4864 /* Execute the sentinel here. If we had relied on
4865 status_notify to do it later, it will read input
4866 from the process before calling the sentinel. */
4867 exec_sentinel (proc
, build_string ("open\n"));
4868 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4870 FD_SET (p
->infd
, &input_wait_mask
);
4871 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4875 #endif /* NON_BLOCKING_CONNECT */
4876 } /* end for each file descriptor */
4877 } /* end while exit conditions not met */
4879 unbind_to (count
, Qnil
);
4881 /* If calling from keyboard input, do not quit
4882 since we want to return C-g as an input character.
4883 Otherwise, do pending quit if requested. */
4886 /* Prevent input_pending from remaining set if we quit. */
4887 clear_input_pending ();
4891 return got_some_input
;
4894 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4897 read_process_output_call (Lisp_Object fun_and_args
)
4899 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4903 read_process_output_error_handler (Lisp_Object error_val
)
4905 cmd_error_internal (error_val
, "error in process filter: ");
4907 update_echo_area ();
4908 Fsleep_for (make_number (2), Qnil
);
4912 /* Read pending output from the process channel,
4913 starting with our buffered-ahead character if we have one.
4914 Yield number of decoded characters read.
4916 This function reads at most 4096 characters.
4917 If you want to read all available subprocess output,
4918 you must call it repeatedly until it returns zero.
4920 The characters read are decoded according to PROC's coding-system
4924 read_process_output (Lisp_Object proc
, register int channel
)
4926 register ssize_t nbytes
;
4928 register Lisp_Object outstream
;
4929 register struct Lisp_Process
*p
= XPROCESS (proc
);
4930 register EMACS_INT opoint
;
4931 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4932 int carryover
= p
->decoding_carryover
;
4934 int count
= SPECPDL_INDEX ();
4935 Lisp_Object odeactivate
;
4937 chars
= (char *) alloca (carryover
+ readmax
);
4939 /* See the comment above. */
4940 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
4942 #ifdef DATAGRAM_SOCKETS
4943 /* We have a working select, so proc_buffered_char is always -1. */
4944 if (DATAGRAM_CHAN_P (channel
))
4946 socklen_t len
= datagram_address
[channel
].len
;
4947 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
4948 0, datagram_address
[channel
].sa
, &len
);
4953 int buffered
= 0 <= proc_buffered_char
[channel
];
4956 chars
[carryover
] = proc_buffered_char
[channel
];
4957 proc_buffered_char
[channel
] = -1;
4960 if (XPROCESS (proc
)->gnutls_p
)
4961 nbytes
= emacs_gnutls_read (XPROCESS (proc
),
4962 chars
+ carryover
+ buffered
,
4963 readmax
- buffered
);
4966 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
4967 readmax
- buffered
);
4968 #ifdef ADAPTIVE_READ_BUFFERING
4969 if (nbytes
> 0 && p
->adaptive_read_buffering
)
4971 int delay
= p
->read_output_delay
;
4974 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
4977 process_output_delay_count
++;
4978 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
4981 else if (delay
> 0 && nbytes
== readmax
- buffered
)
4983 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
4985 process_output_delay_count
--;
4987 p
->read_output_delay
= delay
;
4990 p
->read_output_skip
= 1;
4991 process_output_skip
= 1;
4996 nbytes
+= buffered
&& nbytes
<= 0;
4999 p
->decoding_carryover
= 0;
5001 /* At this point, NBYTES holds number of bytes just received
5002 (including the one in proc_buffered_char[channel]). */
5005 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5007 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5010 /* Now set NBYTES how many bytes we must decode. */
5011 nbytes
+= carryover
;
5013 odeactivate
= Vdeactivate_mark
;
5014 /* There's no good reason to let process filters change the current
5015 buffer, and many callers of accept-process-output, sit-for, and
5016 friends don't expect current-buffer to be changed from under them. */
5017 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5019 /* Read and dispose of the process output. */
5020 outstream
= p
->filter
;
5021 if (!NILP (outstream
))
5024 int outer_running_asynch_code
= running_asynch_code
;
5025 int waiting
= waiting_for_user_input_p
;
5027 /* No need to gcpro these, because all we do with them later
5028 is test them for EQness, and none of them should be a string. */
5030 Lisp_Object obuffer
, okeymap
;
5031 XSETBUFFER (obuffer
, current_buffer
);
5032 okeymap
= BVAR (current_buffer
, keymap
);
5035 /* We inhibit quit here instead of just catching it so that
5036 hitting ^G when a filter happens to be running won't screw
5038 specbind (Qinhibit_quit
, Qt
);
5039 specbind (Qlast_nonmenu_event
, Qt
);
5041 /* In case we get recursively called,
5042 and we already saved the match data nonrecursively,
5043 save the same match data in safely recursive fashion. */
5044 if (outer_running_asynch_code
)
5047 /* Don't clobber the CURRENT match data, either! */
5048 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5049 restore_search_regs ();
5050 record_unwind_save_match_data ();
5051 Fset_match_data (tem
, Qt
);
5054 /* For speed, if a search happens within this code,
5055 save the match data in a special nonrecursive fashion. */
5056 running_asynch_code
= 1;
5058 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5059 text
= coding
->dst_object
;
5060 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5061 /* A new coding system might be found. */
5062 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5064 p
->decode_coding_system
= Vlast_coding_system_used
;
5066 /* Don't call setup_coding_system for
5067 proc_decode_coding_system[channel] here. It is done in
5068 detect_coding called via decode_coding above. */
5070 /* If a coding system for encoding is not yet decided, we set
5071 it as the same as coding-system for decoding.
5073 But, before doing that we must check if
5074 proc_encode_coding_system[p->outfd] surely points to a
5075 valid memory because p->outfd will be changed once EOF is
5076 sent to the process. */
5077 if (NILP (p
->encode_coding_system
)
5078 && proc_encode_coding_system
[p
->outfd
])
5080 p
->encode_coding_system
5081 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5082 setup_coding_system (p
->encode_coding_system
,
5083 proc_encode_coding_system
[p
->outfd
]);
5087 if (coding
->carryover_bytes
> 0)
5089 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5090 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5091 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5092 coding
->carryover_bytes
);
5093 p
->decoding_carryover
= coding
->carryover_bytes
;
5095 if (SBYTES (text
) > 0)
5096 internal_condition_case_1 (read_process_output_call
,
5098 Fcons (proc
, Fcons (text
, Qnil
))),
5099 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5100 read_process_output_error_handler
);
5102 /* If we saved the match data nonrecursively, restore it now. */
5103 restore_search_regs ();
5104 running_asynch_code
= outer_running_asynch_code
;
5106 /* Restore waiting_for_user_input_p as it was
5107 when we were called, in case the filter clobbered it. */
5108 waiting_for_user_input_p
= waiting
;
5110 #if 0 /* Call record_asynch_buffer_change unconditionally,
5111 because we might have changed minor modes or other things
5112 that affect key bindings. */
5113 if (! EQ (Fcurrent_buffer (), obuffer
)
5114 || ! EQ (current_buffer
->keymap
, okeymap
))
5116 /* But do it only if the caller is actually going to read events.
5117 Otherwise there's no need to make him wake up, and it could
5118 cause trouble (for example it would make sit_for return). */
5119 if (waiting_for_user_input_p
== -1)
5120 record_asynch_buffer_change ();
5123 /* If no filter, write into buffer if it isn't dead. */
5124 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5126 Lisp_Object old_read_only
;
5127 EMACS_INT old_begv
, old_zv
;
5128 EMACS_INT old_begv_byte
, old_zv_byte
;
5129 EMACS_INT before
, before_byte
;
5130 EMACS_INT opoint_byte
;
5134 Fset_buffer (p
->buffer
);
5136 opoint_byte
= PT_BYTE
;
5137 old_read_only
= BVAR (current_buffer
, read_only
);
5140 old_begv_byte
= BEGV_BYTE
;
5141 old_zv_byte
= ZV_BYTE
;
5143 BVAR (current_buffer
, read_only
) = Qnil
;
5145 /* Insert new output into buffer
5146 at the current end-of-output marker,
5147 thus preserving logical ordering of input and output. */
5148 if (XMARKER (p
->mark
)->buffer
)
5149 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5150 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5153 SET_PT_BOTH (ZV
, ZV_BYTE
);
5155 before_byte
= PT_BYTE
;
5157 /* If the output marker is outside of the visible region, save
5158 the restriction and widen. */
5159 if (! (BEGV
<= PT
&& PT
<= ZV
))
5162 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5163 text
= coding
->dst_object
;
5164 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5165 /* A new coding system might be found. See the comment in the
5166 similar code in the previous `if' block. */
5167 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5169 p
->decode_coding_system
= Vlast_coding_system_used
;
5170 if (NILP (p
->encode_coding_system
)
5171 && proc_encode_coding_system
[p
->outfd
])
5173 p
->encode_coding_system
5174 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5175 setup_coding_system (p
->encode_coding_system
,
5176 proc_encode_coding_system
[p
->outfd
]);
5179 if (coding
->carryover_bytes
> 0)
5181 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5182 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5183 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5184 coding
->carryover_bytes
);
5185 p
->decoding_carryover
= coding
->carryover_bytes
;
5187 /* Adjust the multibyteness of TEXT to that of the buffer. */
5188 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5189 != ! STRING_MULTIBYTE (text
))
5190 text
= (STRING_MULTIBYTE (text
)
5191 ? Fstring_as_unibyte (text
)
5192 : Fstring_to_multibyte (text
));
5193 /* Insert before markers in case we are inserting where
5194 the buffer's mark is, and the user's next command is Meta-y. */
5195 insert_from_string_before_markers (text
, 0, 0,
5196 SCHARS (text
), SBYTES (text
), 0);
5198 /* Make sure the process marker's position is valid when the
5199 process buffer is changed in the signal_after_change above.
5200 W3 is known to do that. */
5201 if (BUFFERP (p
->buffer
)
5202 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5203 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5205 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5207 update_mode_lines
++;
5209 /* Make sure opoint and the old restrictions
5210 float ahead of any new text just as point would. */
5211 if (opoint
>= before
)
5213 opoint
+= PT
- before
;
5214 opoint_byte
+= PT_BYTE
- before_byte
;
5216 if (old_begv
> before
)
5218 old_begv
+= PT
- before
;
5219 old_begv_byte
+= PT_BYTE
- before_byte
;
5221 if (old_zv
>= before
)
5223 old_zv
+= PT
- before
;
5224 old_zv_byte
+= PT_BYTE
- before_byte
;
5227 /* If the restriction isn't what it should be, set it. */
5228 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5229 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5232 BVAR (current_buffer
, read_only
) = old_read_only
;
5233 SET_PT_BOTH (opoint
, opoint_byte
);
5235 /* Handling the process output should not deactivate the mark. */
5236 Vdeactivate_mark
= odeactivate
;
5238 unbind_to (count
, Qnil
);
5242 /* Sending data to subprocess */
5244 static jmp_buf send_process_frame
;
5245 static Lisp_Object process_sent_to
;
5247 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5248 static void send_process_trap (int) NO_RETURN
;
5252 send_process_trap (int ignore
)
5254 SIGNAL_THREAD_CHECK (SIGPIPE
);
5255 sigunblock (sigmask (SIGPIPE
));
5256 longjmp (send_process_frame
, 1);
5259 /* Send some data to process PROC.
5260 BUF is the beginning of the data; LEN is the number of characters.
5261 OBJECT is the Lisp object that the data comes from. If OBJECT is
5262 nil or t, it means that the data comes from C string.
5264 If OBJECT is not nil, the data is encoded by PROC's coding-system
5265 for encoding before it is sent.
5267 This function can evaluate Lisp code and can garbage collect. */
5270 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5271 volatile EMACS_INT len
, volatile Lisp_Object object
)
5273 /* Use volatile to protect variables from being clobbered by longjmp. */
5274 struct Lisp_Process
*p
= XPROCESS (proc
);
5276 struct coding_system
*coding
;
5277 struct gcpro gcpro1
;
5278 void (*volatile old_sigpipe
) (int);
5282 if (p
->raw_status_new
)
5284 if (! EQ (p
->status
, Qrun
))
5285 error ("Process %s not running", SDATA (p
->name
));
5287 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5289 coding
= proc_encode_coding_system
[p
->outfd
];
5290 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5292 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5293 || (BUFFERP (object
)
5294 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5297 p
->encode_coding_system
5298 = complement_process_encoding_system (p
->encode_coding_system
);
5299 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5301 /* The coding system for encoding was changed to raw-text
5302 because we sent a unibyte text previously. Now we are
5303 sending a multibyte text, thus we must encode it by the
5304 original coding system specified for the current process.
5306 Another reason we comming here is that the coding system
5307 was just complemented and new one was returned by
5308 complement_process_encoding_system. */
5309 setup_coding_system (p
->encode_coding_system
, coding
);
5310 Vlast_coding_system_used
= p
->encode_coding_system
;
5312 coding
->src_multibyte
= 1;
5316 /* For sending a unibyte text, character code conversion should
5317 not take place but EOL conversion should. So, setup raw-text
5318 or one of the subsidiary if we have not yet done it. */
5319 if (CODING_REQUIRE_ENCODING (coding
))
5321 if (CODING_REQUIRE_FLUSHING (coding
))
5323 /* But, before changing the coding, we must flush out data. */
5324 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5325 send_process (proc
, "", 0, Qt
);
5326 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5328 setup_coding_system (raw_text_coding_system
5329 (Vlast_coding_system_used
),
5331 coding
->src_multibyte
= 0;
5334 coding
->dst_multibyte
= 0;
5336 if (CODING_REQUIRE_ENCODING (coding
))
5338 coding
->dst_object
= Qt
;
5339 if (BUFFERP (object
))
5341 EMACS_INT from_byte
, from
, to
;
5342 EMACS_INT save_pt
, save_pt_byte
;
5343 struct buffer
*cur
= current_buffer
;
5345 set_buffer_internal (XBUFFER (object
));
5346 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5348 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5349 from
= BYTE_TO_CHAR (from_byte
);
5350 to
= BYTE_TO_CHAR (from_byte
+ len
);
5351 TEMP_SET_PT_BOTH (from
, from_byte
);
5352 encode_coding_object (coding
, object
, from
, from_byte
,
5353 to
, from_byte
+ len
, Qt
);
5354 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5355 set_buffer_internal (cur
);
5357 else if (STRINGP (object
))
5359 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5360 SBYTES (object
), Qt
);
5364 coding
->dst_object
= make_unibyte_string (buf
, len
);
5365 coding
->produced
= len
;
5368 len
= coding
->produced
;
5369 object
= coding
->dst_object
;
5370 buf
= SSDATA (object
);
5373 if (pty_max_bytes
== 0)
5375 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5376 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5377 if (pty_max_bytes
< 0)
5378 pty_max_bytes
= 250;
5380 pty_max_bytes
= 250;
5382 /* Deduct one, to leave space for the eof. */
5386 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5387 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5388 when returning with longjmp despite being declared volatile. */
5389 if (!setjmp (send_process_frame
))
5391 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5393 process_sent_to
= proc
;
5396 EMACS_INT
this = len
;
5398 /* Send this batch, using one or more write calls. */
5401 EMACS_INT written
= 0;
5402 int outfd
= p
->outfd
;
5403 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5404 #ifdef DATAGRAM_SOCKETS
5405 if (DATAGRAM_CHAN_P (outfd
))
5407 rv
= sendto (outfd
, buf
, this,
5408 0, datagram_address
[outfd
].sa
,
5409 datagram_address
[outfd
].len
);
5412 else if (errno
== EMSGSIZE
)
5414 signal (SIGPIPE
, old_sigpipe
);
5415 report_file_error ("sending datagram",
5416 Fcons (proc
, Qnil
));
5423 if (XPROCESS (proc
)->gnutls_p
)
5424 written
= emacs_gnutls_write (XPROCESS (proc
),
5428 written
= emacs_write (outfd
, buf
, this);
5429 rv
= (written
? 0 : -1);
5430 #ifdef ADAPTIVE_READ_BUFFERING
5431 if (p
->read_output_delay
> 0
5432 && p
->adaptive_read_buffering
== 1)
5434 p
->read_output_delay
= 0;
5435 process_output_delay_count
--;
5436 p
->read_output_skip
= 0;
5440 signal (SIGPIPE
, old_sigpipe
);
5446 || errno
== EWOULDBLOCK
5452 /* Buffer is full. Wait, accepting input;
5453 that may allow the program
5454 to finish doing output and read more. */
5456 EMACS_INT offset
= 0;
5458 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5459 /* A gross hack to work around a bug in FreeBSD.
5460 In the following sequence, read(2) returns
5464 write(2) 954 bytes, get EAGAIN
5465 read(2) 1024 bytes in process_read_output
5466 read(2) 11 bytes in process_read_output
5468 That is, read(2) returns more bytes than have
5469 ever been written successfully. The 1033 bytes
5470 read are the 1022 bytes written successfully
5471 after processing (for example with CRs added if
5472 the terminal is set up that way which it is
5473 here). The same bytes will be seen again in a
5474 later read(2), without the CRs. */
5476 if (errno
== EAGAIN
)
5479 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5481 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5483 /* Running filters might relocate buffers or strings.
5484 Arrange to relocate BUF. */
5485 if (BUFFERP (object
))
5486 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5487 (unsigned char *) buf
);
5488 else if (STRINGP (object
))
5489 offset
= buf
- SSDATA (object
);
5491 #ifdef EMACS_HAS_USECS
5492 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5494 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5497 if (BUFFERP (object
))
5498 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5500 else if (STRINGP (object
))
5501 buf
= offset
+ SSDATA (object
);
5504 /* This is a real error. */
5505 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5515 signal (SIGPIPE
, old_sigpipe
);
5516 proc
= process_sent_to
;
5517 p
= XPROCESS (proc
);
5518 p
->raw_status_new
= 0;
5519 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5520 p
->tick
= ++process_tick
;
5521 deactivate_process (proc
);
5522 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5528 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5530 doc
: /* Send current contents of region as input to PROCESS.
5531 PROCESS may be a process, a buffer, the name of a process or buffer, or
5532 nil, indicating the current buffer's process.
5533 Called from program, takes three arguments, PROCESS, START and END.
5534 If the region is more than 500 characters long,
5535 it is sent in several bunches. This may happen even for shorter regions.
5536 Output from processes can arrive in between bunches. */)
5537 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5540 EMACS_INT start1
, end1
;
5542 proc
= get_process (process
);
5543 validate_region (&start
, &end
);
5545 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5546 move_gap (XINT (start
));
5548 start1
= CHAR_TO_BYTE (XINT (start
));
5549 end1
= CHAR_TO_BYTE (XINT (end
));
5550 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5551 Fcurrent_buffer ());
5556 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5558 doc
: /* Send PROCESS the contents of STRING as input.
5559 PROCESS may be a process, a buffer, the name of a process or buffer, or
5560 nil, indicating the current buffer's process.
5561 If STRING is more than 500 characters long,
5562 it is sent in several bunches. This may happen even for shorter strings.
5563 Output from processes can arrive in between bunches. */)
5564 (Lisp_Object process
, Lisp_Object string
)
5567 CHECK_STRING (string
);
5568 proc
= get_process (process
);
5569 send_process (proc
, SSDATA (string
),
5570 SBYTES (string
), string
);
5574 /* Return the foreground process group for the tty/pty that
5575 the process P uses. */
5577 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5582 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5585 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5586 master side. Try the slave side. */
5587 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5591 ioctl (fd
, TIOCGPGRP
, &gid
);
5595 #endif /* defined (TIOCGPGRP ) */
5600 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5601 Sprocess_running_child_p
, 0, 1, 0,
5602 doc
: /* Return t if PROCESS has given the terminal to a child.
5603 If the operating system does not make it possible to find out,
5604 return t unconditionally. */)
5605 (Lisp_Object process
)
5607 /* Initialize in case ioctl doesn't exist or gives an error,
5608 in a way that will cause returning t. */
5611 struct Lisp_Process
*p
;
5613 proc
= get_process (process
);
5614 p
= XPROCESS (proc
);
5616 if (!EQ (p
->type
, Qreal
))
5617 error ("Process %s is not a subprocess",
5620 error ("Process %s is not active",
5623 gid
= emacs_get_tty_pgrp (p
);
5630 /* send a signal number SIGNO to PROCESS.
5631 If CURRENT_GROUP is t, that means send to the process group
5632 that currently owns the terminal being used to communicate with PROCESS.
5633 This is used for various commands in shell mode.
5634 If CURRENT_GROUP is lambda, that means send to the process group
5635 that currently owns the terminal, but only if it is NOT the shell itself.
5637 If NOMSG is zero, insert signal-announcements into process's buffers
5640 If we can, we try to signal PROCESS by sending control characters
5641 down the pty. This allows us to signal inferiors who have changed
5642 their uid, for which killpg would return an EPERM error. */
5645 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5649 register struct Lisp_Process
*p
;
5653 proc
= get_process (process
);
5654 p
= XPROCESS (proc
);
5656 if (!EQ (p
->type
, Qreal
))
5657 error ("Process %s is not a subprocess",
5660 error ("Process %s is not active",
5664 current_group
= Qnil
;
5666 /* If we are using pgrps, get a pgrp number and make it negative. */
5667 if (NILP (current_group
))
5668 /* Send the signal to the shell's process group. */
5672 #ifdef SIGNALS_VIA_CHARACTERS
5673 /* If possible, send signals to the entire pgrp
5674 by sending an input character to it. */
5677 cc_t
*sig_char
= NULL
;
5679 tcgetattr (p
->infd
, &t
);
5684 sig_char
= &t
.c_cc
[VINTR
];
5688 sig_char
= &t
.c_cc
[VQUIT
];
5692 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5693 sig_char
= &t
.c_cc
[VSWTCH
];
5695 sig_char
= &t
.c_cc
[VSUSP
];
5700 if (sig_char
&& *sig_char
!= CDISABLE
)
5702 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5705 /* If we can't send the signal with a character,
5706 fall through and send it another way. */
5708 /* The code above may fall through if it can't
5709 handle the signal. */
5710 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5713 /* Get the current pgrp using the tty itself, if we have that.
5714 Otherwise, use the pty to get the pgrp.
5715 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5716 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5717 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5718 His patch indicates that if TIOCGPGRP returns an error, then
5719 we should just assume that p->pid is also the process group id. */
5721 gid
= emacs_get_tty_pgrp (p
);
5724 /* If we can't get the information, assume
5725 the shell owns the tty. */
5728 /* It is not clear whether anything really can set GID to -1.
5729 Perhaps on some system one of those ioctls can or could do so.
5730 Or perhaps this is vestigial. */
5733 #else /* ! defined (TIOCGPGRP ) */
5734 /* Can't select pgrps on this system, so we know that
5735 the child itself heads the pgrp. */
5737 #endif /* ! defined (TIOCGPGRP ) */
5739 /* If current_group is lambda, and the shell owns the terminal,
5740 don't send any signal. */
5741 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5749 p
->raw_status_new
= 0;
5751 p
->tick
= ++process_tick
;
5754 status_notify (NULL
);
5755 redisplay_preserve_echo_area (13);
5758 #endif /* ! defined (SIGCONT) */
5762 flush_pending_output (p
->infd
);
5766 /* If we don't have process groups, send the signal to the immediate
5767 subprocess. That isn't really right, but it's better than any
5768 obvious alternative. */
5771 kill (p
->pid
, signo
);
5775 /* gid may be a pid, or minus a pgrp's number */
5777 if (!NILP (current_group
))
5779 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5780 EMACS_KILLPG (gid
, signo
);
5787 #else /* ! defined (TIOCSIGSEND) */
5788 EMACS_KILLPG (gid
, signo
);
5789 #endif /* ! defined (TIOCSIGSEND) */
5792 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5793 doc
: /* Interrupt process PROCESS.
5794 PROCESS may be a process, a buffer, or the name of a process or buffer.
5795 No arg or nil means current buffer's process.
5796 Second arg CURRENT-GROUP non-nil means send signal to
5797 the current process-group of the process's controlling terminal
5798 rather than to the process's own process group.
5799 If the process is a shell, this means interrupt current subjob
5800 rather than the shell.
5802 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5803 don't send the signal. */)
5804 (Lisp_Object process
, Lisp_Object current_group
)
5806 process_send_signal (process
, SIGINT
, current_group
, 0);
5810 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5811 doc
: /* Kill process PROCESS. May be process or name of one.
5812 See function `interrupt-process' for more details on usage. */)
5813 (Lisp_Object process
, Lisp_Object current_group
)
5815 process_send_signal (process
, SIGKILL
, current_group
, 0);
5819 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5820 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5821 See function `interrupt-process' for more details on usage. */)
5822 (Lisp_Object process
, Lisp_Object current_group
)
5824 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5828 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5829 doc
: /* Stop process PROCESS. May be process or name of one.
5830 See function `interrupt-process' for more details on usage.
5831 If PROCESS is a network or serial process, inhibit handling of incoming
5833 (Lisp_Object process
, Lisp_Object current_group
)
5835 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5837 struct Lisp_Process
*p
;
5839 p
= XPROCESS (process
);
5840 if (NILP (p
->command
)
5843 FD_CLR (p
->infd
, &input_wait_mask
);
5844 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5850 error ("No SIGTSTP support");
5852 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5857 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5858 doc
: /* Continue process PROCESS. May be process or name of one.
5859 See function `interrupt-process' for more details on usage.
5860 If PROCESS is a network or serial process, resume handling of incoming
5862 (Lisp_Object process
, Lisp_Object current_group
)
5864 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5866 struct Lisp_Process
*p
;
5868 p
= XPROCESS (process
);
5869 if (EQ (p
->command
, Qt
)
5871 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5873 FD_SET (p
->infd
, &input_wait_mask
);
5874 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5876 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5877 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5878 #else /* not WINDOWSNT */
5879 tcflush (p
->infd
, TCIFLUSH
);
5880 #endif /* not WINDOWSNT */
5886 process_send_signal (process
, SIGCONT
, current_group
, 0);
5888 error ("No SIGCONT support");
5893 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5894 2, 2, "sProcess (name or number): \nnSignal code: ",
5895 doc
: /* Send PROCESS the signal with code SIGCODE.
5896 PROCESS may also be a number specifying the process id of the
5897 process to signal; in this case, the process need not be a child of
5899 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5900 (Lisp_Object process
, Lisp_Object sigcode
)
5904 if (INTEGERP (process
))
5906 pid
= XINT (process
);
5910 if (FLOATP (process
))
5912 pid
= (pid_t
) XFLOAT_DATA (process
);
5916 if (STRINGP (process
))
5919 if (tem
= Fget_process (process
), NILP (tem
))
5921 pid
= XINT (Fstring_to_number (process
, make_number (10)));
5928 process
= get_process (process
);
5933 CHECK_PROCESS (process
);
5934 pid
= XPROCESS (process
)->pid
;
5936 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5940 #define parse_signal(NAME, VALUE) \
5941 else if (!xstrcasecmp (name, NAME)) \
5942 XSETINT (sigcode, VALUE)
5944 if (INTEGERP (sigcode
))
5950 CHECK_SYMBOL (sigcode
);
5951 name
= SSDATA (SYMBOL_NAME (sigcode
));
5953 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
5959 parse_signal ("usr1", SIGUSR1
);
5962 parse_signal ("usr2", SIGUSR2
);
5965 parse_signal ("term", SIGTERM
);
5968 parse_signal ("hup", SIGHUP
);
5971 parse_signal ("int", SIGINT
);
5974 parse_signal ("quit", SIGQUIT
);
5977 parse_signal ("ill", SIGILL
);
5980 parse_signal ("abrt", SIGABRT
);
5983 parse_signal ("emt", SIGEMT
);
5986 parse_signal ("kill", SIGKILL
);
5989 parse_signal ("fpe", SIGFPE
);
5992 parse_signal ("bus", SIGBUS
);
5995 parse_signal ("segv", SIGSEGV
);
5998 parse_signal ("sys", SIGSYS
);
6001 parse_signal ("pipe", SIGPIPE
);
6004 parse_signal ("alrm", SIGALRM
);
6007 parse_signal ("urg", SIGURG
);
6010 parse_signal ("stop", SIGSTOP
);
6013 parse_signal ("tstp", SIGTSTP
);
6016 parse_signal ("cont", SIGCONT
);
6019 parse_signal ("chld", SIGCHLD
);
6022 parse_signal ("ttin", SIGTTIN
);
6025 parse_signal ("ttou", SIGTTOU
);
6028 parse_signal ("io", SIGIO
);
6031 parse_signal ("xcpu", SIGXCPU
);
6034 parse_signal ("xfsz", SIGXFSZ
);
6037 parse_signal ("vtalrm", SIGVTALRM
);
6040 parse_signal ("prof", SIGPROF
);
6043 parse_signal ("winch", SIGWINCH
);
6046 parse_signal ("info", SIGINFO
);
6049 error ("Undefined signal name %s", name
);
6054 return make_number (kill (pid
, XINT (sigcode
)));
6057 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6058 doc
: /* Make PROCESS see end-of-file in its input.
6059 EOF comes after any text already sent to it.
6060 PROCESS may be a process, a buffer, the name of a process or buffer, or
6061 nil, indicating the current buffer's process.
6062 If PROCESS is a network connection, or is a process communicating
6063 through a pipe (as opposed to a pty), then you cannot send any more
6064 text to PROCESS after you call this function.
6065 If PROCESS is a serial process, wait until all output written to the
6066 process has been transmitted to the serial port. */)
6067 (Lisp_Object process
)
6070 struct coding_system
*coding
;
6072 if (DATAGRAM_CONN_P (process
))
6075 proc
= get_process (process
);
6076 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6078 /* Make sure the process is really alive. */
6079 if (XPROCESS (proc
)->raw_status_new
)
6080 update_status (XPROCESS (proc
));
6081 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6082 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6084 if (CODING_REQUIRE_FLUSHING (coding
))
6086 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6087 send_process (proc
, "", 0, Qnil
);
6090 if (XPROCESS (proc
)->pty_flag
)
6091 send_process (proc
, "\004", 1, Qnil
);
6092 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6095 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6096 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6097 #endif /* not WINDOWSNT */
6098 /* Do nothing on Windows because writes are blocking. */
6102 int old_outfd
, new_outfd
;
6104 #ifdef HAVE_SHUTDOWN
6105 /* If this is a network connection, or socketpair is used
6106 for communication with the subprocess, call shutdown to cause EOF.
6107 (In some old system, shutdown to socketpair doesn't work.
6108 Then we just can't win.) */
6109 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6110 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6111 shutdown (XPROCESS (proc
)->outfd
, 1);
6112 /* In case of socketpair, outfd == infd, so don't close it. */
6113 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6114 emacs_close (XPROCESS (proc
)->outfd
);
6115 #else /* not HAVE_SHUTDOWN */
6116 emacs_close (XPROCESS (proc
)->outfd
);
6117 #endif /* not HAVE_SHUTDOWN */
6118 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6121 old_outfd
= XPROCESS (proc
)->outfd
;
6123 if (!proc_encode_coding_system
[new_outfd
])
6124 proc_encode_coding_system
[new_outfd
]
6125 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6126 memcpy (proc_encode_coding_system
[new_outfd
],
6127 proc_encode_coding_system
[old_outfd
],
6128 sizeof (struct coding_system
));
6129 memset (proc_encode_coding_system
[old_outfd
], 0,
6130 sizeof (struct coding_system
));
6132 XPROCESS (proc
)->outfd
= new_outfd
;
6137 /* On receipt of a signal that a child status has changed, loop asking
6138 about children with changed statuses until the system says there
6141 All we do is change the status; we do not run sentinels or print
6142 notifications. That is saved for the next time keyboard input is
6143 done, in order to avoid timing errors.
6145 ** WARNING: this can be called during garbage collection.
6146 Therefore, it must not be fooled by the presence of mark bits in
6149 ** USG WARNING: Although it is not obvious from the documentation
6150 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6151 signal() before executing at least one wait(), otherwise the
6152 handler will be called again, resulting in an infinite loop. The
6153 relevant portion of the documentation reads "SIGCLD signals will be
6154 queued and the signal-catching function will be continually
6155 reentered until the queue is empty". Invoking signal() causes the
6156 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6159 ** Malloc WARNING: This should never call malloc either directly or
6160 indirectly; if it does, that is a bug */
6164 sigchld_handler (int signo
)
6166 int old_errno
= errno
;
6168 struct Lisp_Process
*p
;
6170 SIGNAL_THREAD_CHECK (signo
);
6181 #endif /* no WUNTRACED */
6182 /* Keep trying to get a status until we get a definitive result. */
6186 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6188 while (pid
< 0 && errno
== EINTR
);
6192 /* PID == 0 means no processes found, PID == -1 means a real
6193 failure. We have done all our job, so return. */
6200 #endif /* no WNOHANG */
6202 /* Find the process that signaled us, and record its status. */
6204 /* The process can have been deleted by Fdelete_process. */
6205 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6207 Lisp_Object xpid
= XCAR (tail
);
6208 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6209 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6211 XSETCAR (tail
, Qnil
);
6212 goto sigchld_end_of_loop
;
6216 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6218 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6220 proc
= XCDR (XCAR (tail
));
6221 p
= XPROCESS (proc
);
6222 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6227 /* Look for an asynchronous process whose pid hasn't been filled
6230 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6232 proc
= XCDR (XCAR (tail
));
6233 p
= XPROCESS (proc
);
6239 /* Change the status of the process that was found. */
6242 int clear_desc_flag
= 0;
6244 p
->tick
= ++process_tick
;
6246 p
->raw_status_new
= 1;
6248 /* If process has terminated, stop waiting for its output. */
6249 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6251 clear_desc_flag
= 1;
6253 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6254 if (clear_desc_flag
)
6256 FD_CLR (p
->infd
, &input_wait_mask
);
6257 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6260 /* Tell wait_reading_process_output that it needs to wake up and
6262 if (input_available_clear_time
)
6263 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6266 /* There was no asynchronous process found for that pid: we have
6267 a synchronous process. */
6270 synch_process_alive
= 0;
6272 /* Report the status of the synchronous process. */
6274 synch_process_retcode
= WRETCODE (w
);
6275 else if (WIFSIGNALED (w
))
6276 synch_process_termsig
= WTERMSIG (w
);
6278 /* Tell wait_reading_process_output that it needs to wake up and
6280 if (input_available_clear_time
)
6281 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6284 sigchld_end_of_loop
:
6287 /* On some systems, we must return right away.
6288 If any more processes want to signal us, we will
6290 Otherwise (on systems that have WNOHANG), loop around
6291 to use up all the processes that have something to tell us. */
6292 #if (defined WINDOWSNT \
6293 || (defined USG && !defined GNU_LINUX \
6294 && !(defined HPUX && defined WNOHANG)))
6297 #endif /* USG, but not HPUX with WNOHANG */
6300 #endif /* SIGCHLD */
6304 exec_sentinel_unwind (Lisp_Object data
)
6306 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6311 exec_sentinel_error_handler (Lisp_Object error_val
)
6313 cmd_error_internal (error_val
, "error in process sentinel: ");
6315 update_echo_area ();
6316 Fsleep_for (make_number (2), Qnil
);
6321 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6323 Lisp_Object sentinel
, odeactivate
;
6324 register struct Lisp_Process
*p
= XPROCESS (proc
);
6325 int count
= SPECPDL_INDEX ();
6326 int outer_running_asynch_code
= running_asynch_code
;
6327 int waiting
= waiting_for_user_input_p
;
6329 if (inhibit_sentinels
)
6332 /* No need to gcpro these, because all we do with them later
6333 is test them for EQness, and none of them should be a string. */
6334 odeactivate
= Vdeactivate_mark
;
6336 Lisp_Object obuffer
, okeymap
;
6337 XSETBUFFER (obuffer
, current_buffer
);
6338 okeymap
= BVAR (current_buffer
, keymap
);
6341 /* There's no good reason to let sentinels change the current
6342 buffer, and many callers of accept-process-output, sit-for, and
6343 friends don't expect current-buffer to be changed from under them. */
6344 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6346 sentinel
= p
->sentinel
;
6347 if (NILP (sentinel
))
6350 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6351 assure that it gets restored no matter how the sentinel exits. */
6353 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6354 /* Inhibit quit so that random quits don't screw up a running filter. */
6355 specbind (Qinhibit_quit
, Qt
);
6356 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6358 /* In case we get recursively called,
6359 and we already saved the match data nonrecursively,
6360 save the same match data in safely recursive fashion. */
6361 if (outer_running_asynch_code
)
6364 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6365 restore_search_regs ();
6366 record_unwind_save_match_data ();
6367 Fset_match_data (tem
, Qt
);
6370 /* For speed, if a search happens within this code,
6371 save the match data in a special nonrecursive fashion. */
6372 running_asynch_code
= 1;
6374 internal_condition_case_1 (read_process_output_call
,
6376 Fcons (proc
, Fcons (reason
, Qnil
))),
6377 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6378 exec_sentinel_error_handler
);
6380 /* If we saved the match data nonrecursively, restore it now. */
6381 restore_search_regs ();
6382 running_asynch_code
= outer_running_asynch_code
;
6384 Vdeactivate_mark
= odeactivate
;
6386 /* Restore waiting_for_user_input_p as it was
6387 when we were called, in case the filter clobbered it. */
6388 waiting_for_user_input_p
= waiting
;
6391 if (! EQ (Fcurrent_buffer (), obuffer
)
6392 || ! EQ (current_buffer
->keymap
, okeymap
))
6394 /* But do it only if the caller is actually going to read events.
6395 Otherwise there's no need to make him wake up, and it could
6396 cause trouble (for example it would make sit_for return). */
6397 if (waiting_for_user_input_p
== -1)
6398 record_asynch_buffer_change ();
6400 unbind_to (count
, Qnil
);
6403 /* Report all recent events of a change in process status
6404 (either run the sentinel or output a message).
6405 This is usually done while Emacs is waiting for keyboard input
6406 but can be done at other times. */
6409 status_notify (struct Lisp_Process
*deleting_process
)
6411 register Lisp_Object proc
, buffer
;
6412 Lisp_Object tail
, msg
;
6413 struct gcpro gcpro1
, gcpro2
;
6417 /* We need to gcpro tail; if read_process_output calls a filter
6418 which deletes a process and removes the cons to which tail points
6419 from Vprocess_alist, and then causes a GC, tail is an unprotected
6423 /* Set this now, so that if new processes are created by sentinels
6424 that we run, we get called again to handle their status changes. */
6425 update_tick
= process_tick
;
6427 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6430 register struct Lisp_Process
*p
;
6432 proc
= Fcdr (XCAR (tail
));
6433 p
= XPROCESS (proc
);
6435 if (p
->tick
!= p
->update_tick
)
6437 p
->update_tick
= p
->tick
;
6439 /* If process is still active, read any output that remains. */
6440 while (! EQ (p
->filter
, Qt
)
6441 && ! EQ (p
->status
, Qconnect
)
6442 && ! EQ (p
->status
, Qlisten
)
6443 /* Network or serial process not stopped: */
6444 && ! EQ (p
->command
, Qt
)
6446 && p
!= deleting_process
6447 && read_process_output (proc
, p
->infd
) > 0);
6451 /* Get the text to use for the message. */
6452 if (p
->raw_status_new
)
6454 msg
= status_message (p
);
6456 /* If process is terminated, deactivate it or delete it. */
6458 if (CONSP (p
->status
))
6459 symbol
= XCAR (p
->status
);
6461 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6462 || EQ (symbol
, Qclosed
))
6464 if (delete_exited_processes
)
6465 remove_process (proc
);
6467 deactivate_process (proc
);
6470 /* The actions above may have further incremented p->tick.
6471 So set p->update_tick again
6472 so that an error in the sentinel will not cause
6473 this code to be run again. */
6474 p
->update_tick
= p
->tick
;
6475 /* Now output the message suitably. */
6476 if (!NILP (p
->sentinel
))
6477 exec_sentinel (proc
, msg
);
6478 /* Don't bother with a message in the buffer
6479 when a process becomes runnable. */
6480 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6483 struct buffer
*old
= current_buffer
;
6484 EMACS_INT opoint
, opoint_byte
;
6485 EMACS_INT before
, before_byte
;
6487 /* Avoid error if buffer is deleted
6488 (probably that's why the process is dead, too) */
6489 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6491 Fset_buffer (buffer
);
6494 opoint_byte
= PT_BYTE
;
6495 /* Insert new output into buffer
6496 at the current end-of-output marker,
6497 thus preserving logical ordering of input and output. */
6498 if (XMARKER (p
->mark
)->buffer
)
6499 Fgoto_char (p
->mark
);
6501 SET_PT_BOTH (ZV
, ZV_BYTE
);
6504 before_byte
= PT_BYTE
;
6506 tem
= BVAR (current_buffer
, read_only
);
6507 BVAR (current_buffer
, read_only
) = Qnil
;
6508 insert_string ("\nProcess ");
6509 Finsert (1, &p
->name
);
6510 insert_string (" ");
6512 BVAR (current_buffer
, read_only
) = tem
;
6513 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6515 if (opoint
>= before
)
6516 SET_PT_BOTH (opoint
+ (PT
- before
),
6517 opoint_byte
+ (PT_BYTE
- before_byte
));
6519 SET_PT_BOTH (opoint
, opoint_byte
);
6521 set_buffer_internal (old
);
6526 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6531 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6532 Sset_process_coding_system
, 1, 3, 0,
6533 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6534 DECODING will be used to decode subprocess output and ENCODING to
6535 encode subprocess input. */)
6536 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6538 register struct Lisp_Process
*p
;
6540 CHECK_PROCESS (process
);
6541 p
= XPROCESS (process
);
6543 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6545 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6546 Fcheck_coding_system (decoding
);
6547 Fcheck_coding_system (encoding
);
6548 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6549 p
->decode_coding_system
= decoding
;
6550 p
->encode_coding_system
= encoding
;
6551 setup_process_coding_systems (process
);
6556 DEFUN ("process-coding-system",
6557 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6558 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6559 (register Lisp_Object process
)
6561 CHECK_PROCESS (process
);
6562 return Fcons (XPROCESS (process
)->decode_coding_system
,
6563 XPROCESS (process
)->encode_coding_system
);
6566 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6567 Sset_process_filter_multibyte
, 2, 2, 0,
6568 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6569 If FLAG is non-nil, the filter is given multibyte strings.
6570 If FLAG is nil, the filter is given unibyte strings. In this case,
6571 all character code conversion except for end-of-line conversion is
6573 (Lisp_Object process
, Lisp_Object flag
)
6575 register struct Lisp_Process
*p
;
6577 CHECK_PROCESS (process
);
6578 p
= XPROCESS (process
);
6580 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6581 setup_process_coding_systems (process
);
6586 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6587 Sprocess_filter_multibyte_p
, 1, 1, 0,
6588 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6589 (Lisp_Object process
)
6591 register struct Lisp_Process
*p
;
6592 struct coding_system
*coding
;
6594 CHECK_PROCESS (process
);
6595 p
= XPROCESS (process
);
6596 coding
= proc_decode_coding_system
[p
->infd
];
6597 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6606 add_gpm_wait_descriptor (int desc
)
6608 add_keyboard_wait_descriptor (desc
);
6612 delete_gpm_wait_descriptor (int desc
)
6614 delete_keyboard_wait_descriptor (desc
);
6621 /* Return nonzero if *MASK has a bit set
6622 that corresponds to one of the keyboard input descriptors. */
6625 keyboard_bit_set (fd_set
*mask
)
6629 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6630 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6631 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6638 #else /* not subprocesses */
6640 /* Defined on msdos.c. */
6641 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6644 /* Implementation of wait_reading_process_output, assuming that there
6645 are no subprocesses. Used only by the MS-DOS build.
6647 Wait for timeout to elapse and/or keyboard input to be available.
6650 timeout in seconds, or
6651 zero for no limit, or
6652 -1 means gobble data immediately available but don't wait for any.
6654 read_kbd is a Lisp_Object:
6655 0 to ignore keyboard input, or
6656 1 to return when input is available, or
6657 -1 means caller will actually read the input, so don't throw to
6660 see full version for other parameters. We know that wait_proc will
6661 always be NULL, since `subprocesses' isn't defined.
6663 do_display != 0 means redisplay should be done to show subprocess
6664 output that arrives.
6666 Return true if we received input from any process. */
6669 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6671 Lisp_Object wait_for_cell
,
6672 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6675 EMACS_TIME end_time
, timeout
;
6676 SELECT_TYPE waitchannels
;
6679 /* What does time_limit really mean? */
6680 if (time_limit
|| microsecs
)
6682 EMACS_GET_TIME (end_time
);
6683 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6684 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6687 /* Turn off periodic alarms (in case they are in use)
6688 and then turn off any other atimers,
6689 because the select emulator uses alarms. */
6691 turn_on_atimers (0);
6695 int timeout_reduced_for_timers
= 0;
6697 /* If calling from keyboard input, do not quit
6698 since we want to return C-g as an input character.
6699 Otherwise, do pending quit if requested. */
6703 /* Exit now if the cell we're waiting for became non-nil. */
6704 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6707 /* Compute time from now till when time limit is up */
6708 /* Exit if already run out */
6709 if (time_limit
== -1)
6711 /* -1 specified for timeout means
6712 gobble output available now
6713 but don't wait at all. */
6715 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6717 else if (time_limit
|| microsecs
)
6719 EMACS_GET_TIME (timeout
);
6720 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6721 if (EMACS_TIME_NEG_P (timeout
))
6726 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6729 /* If our caller will not immediately handle keyboard events,
6730 run timer events directly.
6731 (Callers that will immediately read keyboard events
6732 call timer_delay on their own.) */
6733 if (NILP (wait_for_cell
))
6735 EMACS_TIME timer_delay
;
6739 int old_timers_run
= timers_run
;
6740 timer_delay
= timer_check ();
6741 if (timers_run
!= old_timers_run
&& do_display
)
6742 /* We must retry, since a timer may have requeued itself
6743 and that could alter the time delay. */
6744 redisplay_preserve_echo_area (14);
6748 while (!detect_input_pending ());
6750 /* If there is unread keyboard input, also return. */
6752 && requeued_events_pending_p ())
6755 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6757 EMACS_TIME difference
;
6758 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6759 if (EMACS_TIME_NEG_P (difference
))
6761 timeout
= timer_delay
;
6762 timeout_reduced_for_timers
= 1;
6767 /* Cause C-g and alarm signals to take immediate action,
6768 and cause input available signals to zero out timeout. */
6770 set_waiting_for_input (&timeout
);
6772 /* Wait till there is something to do. */
6774 if (! read_kbd
&& NILP (wait_for_cell
))
6775 FD_ZERO (&waitchannels
);
6777 FD_SET (0, &waitchannels
);
6779 /* If a frame has been newly mapped and needs updating,
6780 reprocess its display stuff. */
6781 if (frame_garbaged
&& do_display
)
6783 clear_waiting_for_input ();
6784 redisplay_preserve_echo_area (15);
6786 set_waiting_for_input (&timeout
);
6789 if (read_kbd
&& detect_input_pending ())
6792 FD_ZERO (&waitchannels
);
6795 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6800 /* Make C-g and alarm signals set flags again */
6801 clear_waiting_for_input ();
6803 /* If we woke up due to SIGWINCH, actually change size now. */
6804 do_pending_window_change (0);
6806 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6807 /* We waited the full specified time, so return now. */
6812 /* If the system call was interrupted, then go around the
6814 if (xerrno
== EINTR
)
6815 FD_ZERO (&waitchannels
);
6817 error ("select error: %s", emacs_strerror (xerrno
));
6820 /* Check for keyboard input */
6823 && detect_input_pending_run_timers (do_display
))
6825 swallow_events (do_display
);
6826 if (detect_input_pending_run_timers (do_display
))
6830 /* If there is unread keyboard input, also return. */
6832 && requeued_events_pending_p ())
6835 /* If wait_for_cell. check for keyboard input
6836 but don't run any timers.
6837 ??? (It seems wrong to me to check for keyboard
6838 input at all when wait_for_cell, but the code
6839 has been this way since July 1994.
6840 Try changing this after version 19.31.) */
6841 if (! NILP (wait_for_cell
)
6842 && detect_input_pending ())
6844 swallow_events (do_display
);
6845 if (detect_input_pending ())
6849 /* Exit now if the cell we're waiting for became non-nil. */
6850 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6859 #endif /* not subprocesses */
6861 /* The following functions are needed even if async subprocesses are
6862 not supported. Some of them are no-op stubs in that case. */
6864 /* Add DESC to the set of keyboard input descriptors. */
6867 add_keyboard_wait_descriptor (int desc
)
6869 #ifdef subprocesses /* actually means "not MSDOS" */
6870 FD_SET (desc
, &input_wait_mask
);
6871 FD_SET (desc
, &non_process_wait_mask
);
6872 if (desc
> max_input_desc
)
6873 max_input_desc
= desc
;
6877 /* From now on, do not expect DESC to give keyboard input. */
6880 delete_keyboard_wait_descriptor (int desc
)
6884 int lim
= max_input_desc
;
6886 FD_CLR (desc
, &input_wait_mask
);
6887 FD_CLR (desc
, &non_process_wait_mask
);
6889 if (desc
== max_input_desc
)
6890 for (fd
= 0; fd
< lim
; fd
++)
6891 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
6892 max_input_desc
= fd
;
6896 /* Setup coding systems of PROCESS. */
6899 setup_process_coding_systems (Lisp_Object process
)
6902 struct Lisp_Process
*p
= XPROCESS (process
);
6904 int outch
= p
->outfd
;
6905 Lisp_Object coding_system
;
6907 if (inch
< 0 || outch
< 0)
6910 if (!proc_decode_coding_system
[inch
])
6911 proc_decode_coding_system
[inch
]
6912 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6913 coding_system
= p
->decode_coding_system
;
6914 if (! NILP (p
->filter
))
6916 else if (BUFFERP (p
->buffer
))
6918 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
6919 coding_system
= raw_text_coding_system (coding_system
);
6921 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
6923 if (!proc_encode_coding_system
[outch
])
6924 proc_encode_coding_system
[outch
]
6925 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6926 setup_coding_system (p
->encode_coding_system
,
6927 proc_encode_coding_system
[outch
]);
6931 /* Close all descriptors currently in use for communication
6932 with subprocess. This is used in a newly-forked subprocess
6933 to get rid of irrelevant descriptors. */
6936 close_process_descs (void)
6940 for (i
= 0; i
< MAXDESC
; i
++)
6942 Lisp_Object process
;
6943 process
= chan_process
[i
];
6944 if (!NILP (process
))
6946 int in
= XPROCESS (process
)->infd
;
6947 int out
= XPROCESS (process
)->outfd
;
6950 if (out
>= 0 && in
!= out
)
6957 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
6958 doc
: /* Return the (or a) process associated with BUFFER.
6959 BUFFER may be a buffer or the name of one. */)
6960 (register Lisp_Object buffer
)
6963 register Lisp_Object buf
, tail
, proc
;
6965 if (NILP (buffer
)) return Qnil
;
6966 buf
= Fget_buffer (buffer
);
6967 if (NILP (buf
)) return Qnil
;
6969 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6971 proc
= Fcdr (XCAR (tail
));
6972 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
6975 #endif /* subprocesses */
6979 DEFUN ("process-inherit-coding-system-flag",
6980 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
6982 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
6983 If this flag is t, `buffer-file-coding-system' of the buffer
6984 associated with PROCESS will inherit the coding system used to decode
6985 the process output. */)
6986 (register Lisp_Object process
)
6989 CHECK_PROCESS (process
);
6990 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
6992 /* Ignore the argument and return the value of
6993 inherit-process-coding-system. */
6994 return inherit_process_coding_system
? Qt
: Qnil
;
6998 /* Kill all processes associated with `buffer'.
6999 If `buffer' is nil, kill all processes */
7002 kill_buffer_processes (Lisp_Object buffer
)
7005 Lisp_Object tail
, proc
;
7007 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7009 proc
= XCDR (XCAR (tail
));
7011 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7013 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7014 Fdelete_process (proc
);
7015 else if (XPROCESS (proc
)->infd
>= 0)
7016 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7019 #else /* subprocesses */
7020 /* Since we have no subprocesses, this does nothing. */
7021 #endif /* subprocesses */
7024 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7025 Swaiting_for_user_input_p
, 0, 0, 0,
7026 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7027 This is intended for use by asynchronous process output filters and sentinels. */)
7031 return (waiting_for_user_input_p
? Qt
: Qnil
);
7037 /* Stop reading input from keyboard sources. */
7040 hold_keyboard_input (void)
7045 /* Resume reading input from keyboard sources. */
7048 unhold_keyboard_input (void)
7053 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7056 kbd_on_hold_p (void)
7058 return kbd_is_on_hold
;
7062 /* Enumeration of and access to system processes a-la ps(1). */
7064 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7066 doc
: /* Return a list of numerical process IDs of all running processes.
7067 If this functionality is unsupported, return nil.
7069 See `process-attributes' for getting attributes of a process given its ID. */)
7072 return list_system_processes ();
7075 DEFUN ("process-attributes", Fprocess_attributes
,
7076 Sprocess_attributes
, 1, 1, 0,
7077 doc
: /* Return attributes of the process given by its PID, a number.
7079 Value is an alist where each element is a cons cell of the form
7083 If this functionality is unsupported, the value is nil.
7085 See `list-system-processes' for getting a list of all process IDs.
7087 The KEYs of the attributes that this function may return are listed
7088 below, together with the type of the associated VALUE (in parentheses).
7089 Not all platforms support all of these attributes; unsupported
7090 attributes will not appear in the returned alist.
7091 Unless explicitly indicated otherwise, numbers can have either
7092 integer or floating point values.
7094 euid -- Effective user User ID of the process (number)
7095 user -- User name corresponding to euid (string)
7096 egid -- Effective user Group ID of the process (number)
7097 group -- Group name corresponding to egid (string)
7098 comm -- Command name (executable name only) (string)
7099 state -- Process state code, such as "S", "R", or "T" (string)
7100 ppid -- Parent process ID (number)
7101 pgrp -- Process group ID (number)
7102 sess -- Session ID, i.e. process ID of session leader (number)
7103 ttname -- Controlling tty name (string)
7104 tpgid -- ID of foreground process group on the process's tty (number)
7105 minflt -- number of minor page faults (number)
7106 majflt -- number of major page faults (number)
7107 cminflt -- cumulative number of minor page faults (number)
7108 cmajflt -- cumulative number of major page faults (number)
7109 utime -- user time used by the process, in the (HIGH LOW USEC) format
7110 stime -- system time used by the process, in the (HIGH LOW USEC) format
7111 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7112 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7113 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7114 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7115 pri -- priority of the process (number)
7116 nice -- nice value of the process (number)
7117 thcount -- process thread count (number)
7118 start -- time the process started, in the (HIGH LOW USEC) format
7119 vsize -- virtual memory size of the process in KB's (number)
7120 rss -- resident set size of the process in KB's (number)
7121 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7122 pcpu -- percents of CPU time used by the process (floating-point number)
7123 pmem -- percents of total physical memory used by process's resident set
7124 (floating-point number)
7125 args -- command line which invoked the process (string). */)
7128 return system_process_attributes (pid
);
7138 inhibit_sentinels
= 0;
7142 if (! noninteractive
|| initialized
)
7144 signal (SIGCHLD
, sigchld_handler
);
7147 FD_ZERO (&input_wait_mask
);
7148 FD_ZERO (&non_keyboard_wait_mask
);
7149 FD_ZERO (&non_process_wait_mask
);
7150 FD_ZERO (&write_mask
);
7151 max_process_desc
= 0;
7152 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7154 #ifdef NON_BLOCKING_CONNECT
7155 FD_ZERO (&connect_wait_mask
);
7156 num_pending_connects
= 0;
7159 #ifdef ADAPTIVE_READ_BUFFERING
7160 process_output_delay_count
= 0;
7161 process_output_skip
= 0;
7164 /* Don't do this, it caused infinite select loops. The display
7165 method should call add_keyboard_wait_descriptor on stdin if it
7168 FD_SET (0, &input_wait_mask
);
7171 Vprocess_alist
= Qnil
;
7173 deleted_pid_list
= Qnil
;
7175 for (i
= 0; i
< MAXDESC
; i
++)
7177 chan_process
[i
] = Qnil
;
7178 proc_buffered_char
[i
] = -1;
7180 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7181 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7182 #ifdef DATAGRAM_SOCKETS
7183 memset (datagram_address
, 0, sizeof datagram_address
);
7187 Lisp_Object subfeatures
= Qnil
;
7188 const struct socket_options
*sopt
;
7190 #define ADD_SUBFEATURE(key, val) \
7191 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7193 #ifdef NON_BLOCKING_CONNECT
7194 ADD_SUBFEATURE (QCnowait
, Qt
);
7196 #ifdef DATAGRAM_SOCKETS
7197 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7199 #ifdef HAVE_SEQPACKET
7200 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7202 #ifdef HAVE_LOCAL_SOCKETS
7203 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7205 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7207 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7209 #ifdef HAVE_GETSOCKNAME
7210 ADD_SUBFEATURE (QCservice
, Qt
);
7212 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7213 ADD_SUBFEATURE (QCserver
, Qt
);
7216 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7217 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7219 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7222 #if defined (DARWIN_OS)
7223 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7224 processes. As such, we only change the default value. */
7227 char const *release
= (STRINGP (Voperating_system_release
)
7228 ? SSDATA (Voperating_system_release
)
7230 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7231 && release
[1] == '.')) {
7232 Vprocess_connection_type
= Qnil
;
7236 #endif /* subprocesses */
7241 syms_of_process (void)
7245 DEFSYM (Qprocessp
, "processp");
7246 DEFSYM (Qrun
, "run");
7247 DEFSYM (Qstop
, "stop");
7248 DEFSYM (Qsignal
, "signal");
7250 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7253 Qexit = intern_c_string ("exit");
7254 staticpro (&Qexit); */
7256 DEFSYM (Qopen
, "open");
7257 DEFSYM (Qclosed
, "closed");
7258 DEFSYM (Qconnect
, "connect");
7259 DEFSYM (Qfailed
, "failed");
7260 DEFSYM (Qlisten
, "listen");
7261 DEFSYM (Qlocal
, "local");
7262 DEFSYM (Qipv4
, "ipv4");
7264 DEFSYM (Qipv6
, "ipv6");
7266 DEFSYM (Qdatagram
, "datagram");
7267 DEFSYM (Qseqpacket
, "seqpacket");
7269 DEFSYM (QCport
, ":port");
7270 DEFSYM (QCspeed
, ":speed");
7271 DEFSYM (QCprocess
, ":process");
7273 DEFSYM (QCbytesize
, ":bytesize");
7274 DEFSYM (QCstopbits
, ":stopbits");
7275 DEFSYM (QCparity
, ":parity");
7276 DEFSYM (Qodd
, "odd");
7277 DEFSYM (Qeven
, "even");
7278 DEFSYM (QCflowcontrol
, ":flowcontrol");
7281 DEFSYM (QCsummary
, ":summary");
7283 DEFSYM (Qreal
, "real");
7284 DEFSYM (Qnetwork
, "network");
7285 DEFSYM (Qserial
, "serial");
7286 DEFSYM (QCbuffer
, ":buffer");
7287 DEFSYM (QChost
, ":host");
7288 DEFSYM (QCservice
, ":service");
7289 DEFSYM (QClocal
, ":local");
7290 DEFSYM (QCremote
, ":remote");
7291 DEFSYM (QCcoding
, ":coding");
7292 DEFSYM (QCserver
, ":server");
7293 DEFSYM (QCnowait
, ":nowait");
7294 DEFSYM (QCsentinel
, ":sentinel");
7295 DEFSYM (QClog
, ":log");
7296 DEFSYM (QCnoquery
, ":noquery");
7297 DEFSYM (QCstop
, ":stop");
7298 DEFSYM (QCoptions
, ":options");
7299 DEFSYM (QCplist
, ":plist");
7301 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7303 staticpro (&Vprocess_alist
);
7305 staticpro (&deleted_pid_list
);
7308 #endif /* subprocesses */
7310 DEFSYM (QCname
, ":name");
7311 DEFSYM (QCtype
, ":type");
7313 DEFSYM (Qeuid
, "euid");
7314 DEFSYM (Qegid
, "egid");
7315 DEFSYM (Quser
, "user");
7316 DEFSYM (Qgroup
, "group");
7317 DEFSYM (Qcomm
, "comm");
7318 DEFSYM (Qstate
, "state");
7319 DEFSYM (Qppid
, "ppid");
7320 DEFSYM (Qpgrp
, "pgrp");
7321 DEFSYM (Qsess
, "sess");
7322 DEFSYM (Qttname
, "ttname");
7323 DEFSYM (Qtpgid
, "tpgid");
7324 DEFSYM (Qminflt
, "minflt");
7325 DEFSYM (Qmajflt
, "majflt");
7326 DEFSYM (Qcminflt
, "cminflt");
7327 DEFSYM (Qcmajflt
, "cmajflt");
7328 DEFSYM (Qutime
, "utime");
7329 DEFSYM (Qstime
, "stime");
7330 DEFSYM (Qtime
, "time");
7331 DEFSYM (Qcutime
, "cutime");
7332 DEFSYM (Qcstime
, "cstime");
7333 DEFSYM (Qctime
, "ctime");
7334 DEFSYM (Qpri
, "pri");
7335 DEFSYM (Qnice
, "nice");
7336 DEFSYM (Qthcount
, "thcount");
7337 DEFSYM (Qstart
, "start");
7338 DEFSYM (Qvsize
, "vsize");
7339 DEFSYM (Qrss
, "rss");
7340 DEFSYM (Qetime
, "etime");
7341 DEFSYM (Qpcpu
, "pcpu");
7342 DEFSYM (Qpmem
, "pmem");
7343 DEFSYM (Qargs
, "args");
7345 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7346 doc
: /* *Non-nil means delete processes immediately when they exit.
7347 A value of nil means don't delete them until `list-processes' is run. */);
7349 delete_exited_processes
= 1;
7352 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7353 doc
: /* Control type of device used to communicate with subprocesses.
7354 Values are nil to use a pipe, or t or `pty' to use a pty.
7355 The value has no effect if the system has no ptys or if all ptys are busy:
7356 then a pipe is used in any case.
7357 The value takes effect when `start-process' is called. */);
7358 Vprocess_connection_type
= Qt
;
7360 #ifdef ADAPTIVE_READ_BUFFERING
7361 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7362 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7363 On some systems, when Emacs reads the output from a subprocess, the output data
7364 is read in very small blocks, potentially resulting in very poor performance.
7365 This behavior can be remedied to some extent by setting this variable to a
7366 non-nil value, as it will automatically delay reading from such processes, to
7367 allow them to produce more output before Emacs tries to read it.
7368 If the value is t, the delay is reset after each write to the process; any other
7369 non-nil value means that the delay is not reset on write.
7370 The variable takes effect when `start-process' is called. */);
7371 Vprocess_adaptive_read_buffering
= Qt
;
7374 defsubr (&Sprocessp
);
7375 defsubr (&Sget_process
);
7376 defsubr (&Sdelete_process
);
7377 defsubr (&Sprocess_status
);
7378 defsubr (&Sprocess_exit_status
);
7379 defsubr (&Sprocess_id
);
7380 defsubr (&Sprocess_name
);
7381 defsubr (&Sprocess_tty_name
);
7382 defsubr (&Sprocess_command
);
7383 defsubr (&Sset_process_buffer
);
7384 defsubr (&Sprocess_buffer
);
7385 defsubr (&Sprocess_mark
);
7386 defsubr (&Sset_process_filter
);
7387 defsubr (&Sprocess_filter
);
7388 defsubr (&Sset_process_sentinel
);
7389 defsubr (&Sprocess_sentinel
);
7390 defsubr (&Sset_process_window_size
);
7391 defsubr (&Sset_process_inherit_coding_system_flag
);
7392 defsubr (&Sset_process_query_on_exit_flag
);
7393 defsubr (&Sprocess_query_on_exit_flag
);
7394 defsubr (&Sprocess_contact
);
7395 defsubr (&Sprocess_plist
);
7396 defsubr (&Sset_process_plist
);
7397 defsubr (&Sprocess_list
);
7398 defsubr (&Sstart_process
);
7399 defsubr (&Sserial_process_configure
);
7400 defsubr (&Smake_serial_process
);
7401 defsubr (&Sset_network_process_option
);
7402 defsubr (&Smake_network_process
);
7403 defsubr (&Sformat_network_address
);
7404 #if defined(HAVE_NET_IF_H)
7406 defsubr (&Snetwork_interface_list
);
7408 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7409 defsubr (&Snetwork_interface_info
);
7411 #endif /* defined(HAVE_NET_IF_H) */
7412 #ifdef DATAGRAM_SOCKETS
7413 defsubr (&Sprocess_datagram_address
);
7414 defsubr (&Sset_process_datagram_address
);
7416 defsubr (&Saccept_process_output
);
7417 defsubr (&Sprocess_send_region
);
7418 defsubr (&Sprocess_send_string
);
7419 defsubr (&Sinterrupt_process
);
7420 defsubr (&Skill_process
);
7421 defsubr (&Squit_process
);
7422 defsubr (&Sstop_process
);
7423 defsubr (&Scontinue_process
);
7424 defsubr (&Sprocess_running_child_p
);
7425 defsubr (&Sprocess_send_eof
);
7426 defsubr (&Ssignal_process
);
7427 defsubr (&Swaiting_for_user_input_p
);
7428 defsubr (&Sprocess_type
);
7429 defsubr (&Sset_process_coding_system
);
7430 defsubr (&Sprocess_coding_system
);
7431 defsubr (&Sset_process_filter_multibyte
);
7432 defsubr (&Sprocess_filter_multibyte_p
);
7434 #endif /* subprocesses */
7436 defsubr (&Sget_buffer_process
);
7437 defsubr (&Sprocess_inherit_coding_system_flag
);
7438 defsubr (&Slist_system_processes
);
7439 defsubr (&Sprocess_attributes
);