1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2012
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/>. */
24 #define PROCESS_INLINE EXTERN_INLINE
28 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
36 /* Only MS-DOS does not define `subprocesses'. */
39 #include <sys/socket.h>
41 #include <netinet/in.h>
42 #include <arpa/inet.h>
44 /* Are local (unix) sockets supported? */
45 #if defined (HAVE_SYS_UN_H)
46 #if !defined (AF_LOCAL) && defined (AF_UNIX)
47 #define AF_LOCAL AF_UNIX
50 #define HAVE_LOCAL_SOCKETS
55 #include <sys/ioctl.h>
56 #if defined (HAVE_NET_IF_H)
58 #endif /* HAVE_NET_IF_H */
60 #if defined (HAVE_IFADDRS_H)
61 /* Must be after net/if.h */
64 /* We only use structs from this header when we use getifaddrs. */
65 #if defined (HAVE_NET_IF_DL_H)
66 #include <net/if_dl.h>
76 # include <sys/stream.h>
77 # include <sys/stropts.h>
81 #include <netinet/in.h>
82 #include <arpa/nameser.h>
94 #endif /* subprocesses */
100 #include "character.h"
105 #include "termhooks.h"
106 #include "termopts.h"
107 #include "commands.h"
108 #include "keyboard.h"
109 #include "blockinput.h"
110 #include "dispextern.h"
111 #include "composite.h"
113 #include "sysselect.h"
114 #include "syssignal.h"
120 #ifdef HAVE_WINDOW_SYSTEM
122 #endif /* HAVE_WINDOW_SYSTEM */
124 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
125 #include "xgselect.h"
129 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
130 EMACS_TIME
*, void *);
133 /* Work around GCC 4.7.0 bug with strict overflow checking; see
134 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
135 These lines can be removed once the GCC bug is fixed. */
136 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
137 # pragma GCC diagnostic ignored "-Wstrict-overflow"
140 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
141 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
142 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
143 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
144 Lisp_Object QCname
, QCtype
;
146 /* Non-zero if keyboard input is on hold, zero otherwise. */
148 static int kbd_is_on_hold
;
150 /* Nonzero means don't run process sentinels. This is used
152 int inhibit_sentinels
;
156 Lisp_Object Qprocessp
;
157 static Lisp_Object Qrun
, Qstop
, Qsignal
;
158 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
160 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
161 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
163 static Lisp_Object Qipv6
;
165 static Lisp_Object QCport
, QCprocess
;
167 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
168 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
169 static Lisp_Object QCbuffer
, QChost
, QCservice
;
170 static Lisp_Object QClocal
, QCremote
, QCcoding
;
171 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
172 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
173 static Lisp_Object Qlast_nonmenu_event
;
175 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
176 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
177 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
178 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
184 /* Number of events of change of status of a process. */
185 static EMACS_INT process_tick
;
186 /* Number of events for which the user or sentinel has been notified. */
187 static EMACS_INT update_tick
;
189 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
191 /* Only W32 has this, it really means that select can't take write mask. */
192 #ifdef BROKEN_NON_BLOCKING_CONNECT
193 #undef NON_BLOCKING_CONNECT
194 #define SELECT_CANT_DO_WRITE_MASK
196 #ifndef NON_BLOCKING_CONNECT
198 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
199 #if O_NONBLOCK || O_NDELAY
200 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
201 #define NON_BLOCKING_CONNECT
202 #endif /* EWOULDBLOCK || EINPROGRESS */
203 #endif /* O_NONBLOCK || O_NDELAY */
204 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
205 #endif /* HAVE_SELECT */
206 #endif /* NON_BLOCKING_CONNECT */
207 #endif /* BROKEN_NON_BLOCKING_CONNECT */
209 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
210 this system. We need to read full packets, so we need a
211 "non-destructive" select. So we require either native select,
212 or emulation of select using FIONREAD. */
214 #ifndef BROKEN_DATAGRAM_SOCKETS
215 # if defined HAVE_SELECT || defined USABLE_FIONREAD
216 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
217 # define DATAGRAM_SOCKETS
222 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
223 # define HAVE_SEQPACKET
226 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
227 #define ADAPTIVE_READ_BUFFERING
230 #ifdef ADAPTIVE_READ_BUFFERING
231 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
232 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
233 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
235 /* Number of processes which have a non-zero read_output_delay,
236 and therefore might be delayed for adaptive read buffering. */
238 static int process_output_delay_count
;
240 /* Non-zero if any process has non-nil read_output_skip. */
242 static int process_output_skip
;
245 #define process_output_delay_count 0
248 static void create_process (Lisp_Object
, char **, Lisp_Object
);
250 static int keyboard_bit_set (SELECT_TYPE
*);
252 static void deactivate_process (Lisp_Object
);
253 static void status_notify (struct Lisp_Process
*);
254 static int read_process_output (Lisp_Object
, int);
255 static void handle_child_signal (int);
256 static void create_pty (Lisp_Object
);
258 /* If we support a window system, turn on the code to poll periodically
259 to detect C-g. It isn't actually used when doing interrupt input. */
260 #ifdef HAVE_WINDOW_SYSTEM
261 #define POLL_FOR_INPUT
264 static Lisp_Object
get_process (register Lisp_Object name
);
265 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
267 /* Mask of bits indicating the descriptors that we wait for input on. */
269 static SELECT_TYPE input_wait_mask
;
271 /* Mask that excludes keyboard input descriptor(s). */
273 static SELECT_TYPE non_keyboard_wait_mask
;
275 /* Mask that excludes process input descriptor(s). */
277 static SELECT_TYPE non_process_wait_mask
;
279 /* Mask for selecting for write. */
281 static SELECT_TYPE write_mask
;
283 #ifdef NON_BLOCKING_CONNECT
284 /* Mask of bits indicating the descriptors that we wait for connect to
285 complete on. Once they complete, they are removed from this mask
286 and added to the input_wait_mask and non_keyboard_wait_mask. */
288 static SELECT_TYPE connect_wait_mask
;
290 /* Number of bits set in connect_wait_mask. */
291 static int num_pending_connects
;
292 #endif /* NON_BLOCKING_CONNECT */
294 /* The largest descriptor currently in use for a process object. */
295 static int max_process_desc
;
297 /* The largest descriptor currently in use for input. */
298 static int max_input_desc
;
300 /* Indexed by descriptor, gives the process (if any) for that descriptor */
301 static Lisp_Object chan_process
[MAXDESC
];
303 /* Alist of elements (NAME . PROCESS) */
304 static Lisp_Object Vprocess_alist
;
306 /* Buffered-ahead input char from process, indexed by channel.
307 -1 means empty (no char is buffered).
308 Used on sys V where the only way to tell if there is any
309 output from the process is to read at least one char.
310 Always -1 on systems that support FIONREAD. */
312 static int proc_buffered_char
[MAXDESC
];
314 /* Table of `struct coding-system' for each process. */
315 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
316 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
318 #ifdef DATAGRAM_SOCKETS
319 /* Table of `partner address' for datagram sockets. */
320 static struct sockaddr_and_len
{
323 } datagram_address
[MAXDESC
];
324 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
325 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
327 #define DATAGRAM_CHAN_P(chan) (0)
328 #define DATAGRAM_CONN_P(proc) (0)
331 /* These setters are used only in this file, so they can be private. */
333 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
338 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
343 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
345 p
->decode_coding_system
= val
;
348 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
350 p
->decoding_buf
= val
;
353 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
355 p
->encode_coding_system
= val
;
358 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
360 p
->encoding_buf
= val
;
363 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
368 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
373 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
378 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
383 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
388 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
393 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
398 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
403 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
408 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
410 p
->write_queue
= val
;
415 static struct fd_callback_data
421 int condition
; /* mask of the defines above. */
422 } fd_callback_info
[MAXDESC
];
425 /* Add a file descriptor FD to be monitored for when read is possible.
426 When read is possible, call FUNC with argument DATA. */
429 add_read_fd (int fd
, fd_callback func
, void *data
)
431 eassert (fd
< MAXDESC
);
432 add_keyboard_wait_descriptor (fd
);
434 fd_callback_info
[fd
].func
= func
;
435 fd_callback_info
[fd
].data
= data
;
436 fd_callback_info
[fd
].condition
|= FOR_READ
;
439 /* Stop monitoring file descriptor FD for when read is possible. */
442 delete_read_fd (int fd
)
444 eassert (fd
< MAXDESC
);
445 delete_keyboard_wait_descriptor (fd
);
447 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
448 if (fd_callback_info
[fd
].condition
== 0)
450 fd_callback_info
[fd
].func
= 0;
451 fd_callback_info
[fd
].data
= 0;
455 /* Add a file descriptor FD to be monitored for when write is possible.
456 When write is possible, call FUNC with argument DATA. */
459 add_write_fd (int fd
, fd_callback func
, void *data
)
461 eassert (fd
< MAXDESC
);
462 FD_SET (fd
, &write_mask
);
463 if (fd
> max_input_desc
)
466 fd_callback_info
[fd
].func
= func
;
467 fd_callback_info
[fd
].data
= data
;
468 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
471 /* Stop monitoring file descriptor FD for when write is possible. */
474 delete_write_fd (int fd
)
476 int lim
= max_input_desc
;
478 eassert (fd
< MAXDESC
);
479 FD_CLR (fd
, &write_mask
);
480 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
481 if (fd_callback_info
[fd
].condition
== 0)
483 fd_callback_info
[fd
].func
= 0;
484 fd_callback_info
[fd
].data
= 0;
486 if (fd
== max_input_desc
)
487 for (fd
= lim
; fd
>= 0; fd
--)
488 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
498 /* Compute the Lisp form of the process status, p->status, from
499 the numeric status that was returned by `wait'. */
501 static Lisp_Object
status_convert (int);
504 update_status (struct Lisp_Process
*p
)
506 eassert (p
->raw_status_new
);
507 pset_status (p
, status_convert (p
->raw_status
));
508 p
->raw_status_new
= 0;
511 /* Convert a process status word in Unix format to
512 the list that we use internally. */
515 status_convert (int w
)
518 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
519 else if (WIFEXITED (w
))
520 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
521 WCOREDUMP (w
) ? Qt
: Qnil
));
522 else if (WIFSIGNALED (w
))
523 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
524 WCOREDUMP (w
) ? Qt
: Qnil
));
529 /* Given a status-list, extract the three pieces of information
530 and store them individually through the three pointers. */
533 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
547 *code
= XFASTINT (XCAR (tem
));
549 *coredump
= !NILP (tem
);
553 /* Return a string describing a process status list. */
556 status_message (struct Lisp_Process
*p
)
558 Lisp_Object status
= p
->status
;
561 Lisp_Object string
, string2
;
563 decode_status (status
, &symbol
, &code
, &coredump
);
565 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
568 synchronize_system_messages_locale ();
569 signame
= strsignal (code
);
571 string
= build_string ("unknown");
576 string
= build_unibyte_string (signame
);
577 if (! NILP (Vlocale_coding_system
))
578 string
= (code_convert_string_norecord
579 (string
, Vlocale_coding_system
, 0));
580 c1
= STRING_CHAR (SDATA (string
));
583 Faset (string
, make_number (0), make_number (c2
));
585 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
586 return concat2 (string
, string2
);
588 else if (EQ (symbol
, Qexit
))
591 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
593 return build_string ("finished\n");
594 string
= Fnumber_to_string (make_number (code
));
595 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
596 return concat3 (build_string ("exited abnormally with code "),
599 else if (EQ (symbol
, Qfailed
))
601 string
= Fnumber_to_string (make_number (code
));
602 string2
= build_string ("\n");
603 return concat3 (build_string ("failed with code "),
607 return Fcopy_sequence (Fsymbol_name (symbol
));
612 /* The file name of the pty opened by allocate_pty. */
613 static char pty_name
[24];
615 /* Open an available pty, returning a file descriptor.
616 Return -1 on failure.
617 The file name of the terminal corresponding to the pty
618 is left in the variable pty_name. */
629 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
630 for (i
= 0; i
< 16; i
++)
633 #ifdef PTY_NAME_SPRINTF
636 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
637 #endif /* no PTY_NAME_SPRINTF */
641 #else /* no PTY_OPEN */
644 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
646 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
649 #endif /* no PTY_OPEN */
653 /* check to make certain that both sides are available
654 this avoids a nasty yet stupid bug in rlogins */
655 #ifdef PTY_TTY_NAME_SPRINTF
658 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
659 #endif /* no PTY_TTY_NAME_SPRINTF */
660 if (faccessat (AT_FDCWD
, pty_name
, R_OK
| W_OK
, AT_EACCESS
) != 0)
675 #endif /* HAVE_PTYS */
678 make_process (Lisp_Object name
)
680 register Lisp_Object val
, tem
, name1
;
681 register struct Lisp_Process
*p
;
682 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
685 p
= allocate_process ();
686 /* Initialize Lisp data. Note that allocate_process initializes all
687 Lisp data to nil, so do it only for slots which should not be nil. */
688 pset_status (p
, Qrun
);
689 pset_mark (p
, Fmake_marker ());
691 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
692 non-Lisp data, so do it only for slots which should not be zero. */
697 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
700 /* If name is already in use, modify it until it is unused. */
705 tem
= Fget_process (name1
);
706 if (NILP (tem
)) break;
707 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
711 XSETPROCESS (val
, p
);
712 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
717 remove_process (register Lisp_Object proc
)
719 register Lisp_Object pair
;
721 pair
= Frassq (proc
, Vprocess_alist
);
722 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
724 deactivate_process (proc
);
728 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
729 doc
: /* Return t if OBJECT is a process. */)
732 return PROCESSP (object
) ? Qt
: Qnil
;
735 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
736 doc
: /* Return the process named NAME, or nil if there is none. */)
737 (register Lisp_Object name
)
742 return Fcdr (Fassoc (name
, Vprocess_alist
));
745 /* This is how commands for the user decode process arguments. It
746 accepts a process, a process name, a buffer, a buffer name, or nil.
747 Buffers denote the first process in the buffer, and nil denotes the
751 get_process (register Lisp_Object name
)
753 register Lisp_Object proc
, obj
;
756 obj
= Fget_process (name
);
758 obj
= Fget_buffer (name
);
760 error ("Process %s does not exist", SDATA (name
));
762 else if (NILP (name
))
763 obj
= Fcurrent_buffer ();
767 /* Now obj should be either a buffer object or a process object.
771 proc
= Fget_buffer_process (obj
);
773 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
785 /* Fdelete_process promises to immediately forget about the process, but in
786 reality, Emacs needs to remember those processes until they have been
787 treated by the SIGCHLD handler and waitpid has been invoked on them;
788 otherwise they might fill up the kernel's process table. */
789 static Lisp_Object deleted_pid_list
;
792 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
793 doc
: /* Delete PROCESS: kill it and forget about it immediately.
794 PROCESS may be a process, a buffer, the name of a process or buffer, or
795 nil, indicating the current buffer's process. */)
796 (register Lisp_Object process
)
798 register struct Lisp_Process
*p
;
800 process
= get_process (process
);
801 p
= XPROCESS (process
);
803 p
->raw_status_new
= 0;
804 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
806 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
807 p
->tick
= ++process_tick
;
809 redisplay_preserve_echo_area (13);
811 else if (p
->infd
>= 0)
817 /* No problem storing the pid here, as it is still in Vprocess_alist. */
818 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
819 /* GC treated elements set to nil. */
820 Fdelq (Qnil
, deleted_pid_list
));
821 /* If the process has already signaled, remove it from the list. */
822 if (p
->raw_status_new
)
825 if (CONSP (p
->status
))
826 symbol
= XCAR (p
->status
);
827 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
829 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
833 Fkill_process (process
, Qnil
);
834 /* Do this now, since remove_process will make the
835 SIGCHLD handler do nothing. */
836 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
837 p
->tick
= ++process_tick
;
839 redisplay_preserve_echo_area (13);
842 remove_process (process
);
846 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
847 doc
: /* Return the status of PROCESS.
848 The returned value is one of the following symbols:
849 run -- for a process that is running.
850 stop -- for a process stopped but continuable.
851 exit -- for a process that has exited.
852 signal -- for a process that has got a fatal signal.
853 open -- for a network stream connection that is open.
854 listen -- for a network stream server that is listening.
855 closed -- for a network stream connection that is closed.
856 connect -- when waiting for a non-blocking connection to complete.
857 failed -- when a non-blocking connection has failed.
858 nil -- if arg is a process name and no such process exists.
859 PROCESS may be a process, a buffer, the name of a process, or
860 nil, indicating the current buffer's process. */)
861 (register Lisp_Object process
)
863 register struct Lisp_Process
*p
;
864 register Lisp_Object status
;
866 if (STRINGP (process
))
867 process
= Fget_process (process
);
869 process
= get_process (process
);
874 p
= XPROCESS (process
);
875 if (p
->raw_status_new
)
879 status
= XCAR (status
);
880 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
882 if (EQ (status
, Qexit
))
884 else if (EQ (p
->command
, Qt
))
886 else if (EQ (status
, Qrun
))
892 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
894 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
895 If PROCESS has not yet exited or died, return 0. */)
896 (register Lisp_Object process
)
898 CHECK_PROCESS (process
);
899 if (XPROCESS (process
)->raw_status_new
)
900 update_status (XPROCESS (process
));
901 if (CONSP (XPROCESS (process
)->status
))
902 return XCAR (XCDR (XPROCESS (process
)->status
));
903 return make_number (0);
906 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
907 doc
: /* Return the process id of PROCESS.
908 This is the pid of the external process which PROCESS uses or talks to.
909 For a network connection, this value is nil. */)
910 (register Lisp_Object process
)
914 CHECK_PROCESS (process
);
915 pid
= XPROCESS (process
)->pid
;
916 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
919 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
920 doc
: /* Return the name of PROCESS, as a string.
921 This is the name of the program invoked in PROCESS,
922 possibly modified to make it unique among process names. */)
923 (register Lisp_Object process
)
925 CHECK_PROCESS (process
);
926 return XPROCESS (process
)->name
;
929 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
930 doc
: /* Return the command that was executed to start PROCESS.
931 This is a list of strings, the first string being the program executed
932 and the rest of the strings being the arguments given to it.
933 For a network or serial process, this is nil (process is running) or t
934 \(process is stopped). */)
935 (register Lisp_Object process
)
937 CHECK_PROCESS (process
);
938 return XPROCESS (process
)->command
;
941 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
942 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
943 This is the terminal that the process itself reads and writes on,
944 not the name of the pty that Emacs uses to talk with that terminal. */)
945 (register Lisp_Object process
)
947 CHECK_PROCESS (process
);
948 return XPROCESS (process
)->tty_name
;
951 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
953 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
955 (register Lisp_Object process
, Lisp_Object buffer
)
957 struct Lisp_Process
*p
;
959 CHECK_PROCESS (process
);
961 CHECK_BUFFER (buffer
);
962 p
= XPROCESS (process
);
963 pset_buffer (p
, buffer
);
964 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
965 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
966 setup_process_coding_systems (process
);
970 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
972 doc
: /* Return the buffer PROCESS is associated with.
973 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
974 (register Lisp_Object process
)
976 CHECK_PROCESS (process
);
977 return XPROCESS (process
)->buffer
;
980 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
982 doc
: /* Return the marker for the end of the last output from PROCESS. */)
983 (register Lisp_Object process
)
985 CHECK_PROCESS (process
);
986 return XPROCESS (process
)->mark
;
989 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
991 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
992 A value of t means stop accepting output from the process.
994 When a process has a filter, its buffer is not used for output.
995 Instead, each time it does output, the entire string of output is
996 passed to the filter.
998 The filter gets two arguments: the process and the string of output.
999 The string argument is normally a multibyte string, except:
1000 - if the process' input coding system is no-conversion or raw-text,
1001 it is a unibyte string (the non-converted input), or else
1002 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1003 string (the result of converting the decoded input multibyte
1004 string to unibyte with `string-make-unibyte'). */)
1005 (register Lisp_Object process
, Lisp_Object filter
)
1007 struct Lisp_Process
*p
;
1009 CHECK_PROCESS (process
);
1010 p
= XPROCESS (process
);
1012 /* Don't signal an error if the process' input file descriptor
1013 is closed. This could make debugging Lisp more difficult,
1014 for example when doing something like
1016 (setq process (start-process ...))
1018 (set-process-filter process ...) */
1022 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1024 FD_CLR (p
->infd
, &input_wait_mask
);
1025 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1027 else if (EQ (p
->filter
, Qt
)
1028 /* Network or serial process not stopped: */
1029 && !EQ (p
->command
, Qt
))
1031 FD_SET (p
->infd
, &input_wait_mask
);
1032 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1036 pset_filter (p
, filter
);
1037 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1038 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1039 setup_process_coding_systems (process
);
1043 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1045 doc
: /* Returns the filter function of PROCESS; nil if none.
1046 See `set-process-filter' for more info on filter functions. */)
1047 (register Lisp_Object process
)
1049 CHECK_PROCESS (process
);
1050 return XPROCESS (process
)->filter
;
1053 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1055 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1056 The sentinel is called as a function when the process changes state.
1057 It gets two arguments: the process, and a string describing the change. */)
1058 (register Lisp_Object process
, Lisp_Object sentinel
)
1060 struct Lisp_Process
*p
;
1062 CHECK_PROCESS (process
);
1063 p
= XPROCESS (process
);
1065 pset_sentinel (p
, sentinel
);
1066 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1067 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1071 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1073 doc
: /* Return the sentinel of PROCESS; nil if none.
1074 See `set-process-sentinel' for more info on sentinels. */)
1075 (register Lisp_Object process
)
1077 CHECK_PROCESS (process
);
1078 return XPROCESS (process
)->sentinel
;
1081 DEFUN ("set-process-window-size", Fset_process_window_size
,
1082 Sset_process_window_size
, 3, 3, 0,
1083 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1084 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1086 CHECK_PROCESS (process
);
1087 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1088 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1090 if (XPROCESS (process
)->infd
< 0
1091 || set_window_size (XPROCESS (process
)->infd
,
1092 XINT (height
), XINT (width
)) <= 0)
1098 DEFUN ("set-process-inherit-coding-system-flag",
1099 Fset_process_inherit_coding_system_flag
,
1100 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1101 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1102 If the second argument FLAG is non-nil, then the variable
1103 `buffer-file-coding-system' of the buffer associated with PROCESS
1104 will be bound to the value of the coding system used to decode
1107 This is useful when the coding system specified for the process buffer
1108 leaves either the character code conversion or the end-of-line conversion
1109 unspecified, or if the coding system used to decode the process output
1110 is more appropriate for saving the process buffer.
1112 Binding the variable `inherit-process-coding-system' to non-nil before
1113 starting the process is an alternative way of setting the inherit flag
1114 for the process which will run.
1116 This function returns FLAG. */)
1117 (register Lisp_Object process
, Lisp_Object flag
)
1119 CHECK_PROCESS (process
);
1120 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1124 DEFUN ("set-process-query-on-exit-flag",
1125 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1127 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1128 If the second argument FLAG is non-nil, Emacs will query the user before
1129 exiting or killing a buffer if PROCESS is running. This function
1131 (register Lisp_Object process
, Lisp_Object flag
)
1133 CHECK_PROCESS (process
);
1134 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1138 DEFUN ("process-query-on-exit-flag",
1139 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1141 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1142 (register Lisp_Object process
)
1144 CHECK_PROCESS (process
);
1145 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1148 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1150 doc
: /* Return the contact info of PROCESS; t for a real child.
1151 For a network or serial connection, the value depends on the optional
1152 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1153 SERVICE) for a network connection or (PORT SPEED) for a serial
1154 connection. If KEY is t, the complete contact information for the
1155 connection is returned, else the specific value for the keyword KEY is
1156 returned. See `make-network-process' or `make-serial-process' for a
1157 list of keywords. */)
1158 (register Lisp_Object process
, Lisp_Object key
)
1160 Lisp_Object contact
;
1162 CHECK_PROCESS (process
);
1163 contact
= XPROCESS (process
)->childp
;
1165 #ifdef DATAGRAM_SOCKETS
1166 if (DATAGRAM_CONN_P (process
)
1167 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1168 contact
= Fplist_put (contact
, QCremote
,
1169 Fprocess_datagram_address (process
));
1172 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1174 if (NILP (key
) && NETCONN_P (process
))
1175 return Fcons (Fplist_get (contact
, QChost
),
1176 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1177 if (NILP (key
) && SERIALCONN_P (process
))
1178 return Fcons (Fplist_get (contact
, QCport
),
1179 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1180 return Fplist_get (contact
, key
);
1183 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1185 doc
: /* Return the plist of PROCESS. */)
1186 (register Lisp_Object process
)
1188 CHECK_PROCESS (process
);
1189 return XPROCESS (process
)->plist
;
1192 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1194 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1195 (register Lisp_Object process
, Lisp_Object plist
)
1197 CHECK_PROCESS (process
);
1200 pset_plist (XPROCESS (process
), plist
);
1204 #if 0 /* Turned off because we don't currently record this info
1205 in the process. Perhaps add it. */
1206 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1207 doc
: /* Return the connection type of PROCESS.
1208 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1209 a socket connection. */)
1210 (Lisp_Object process
)
1212 return XPROCESS (process
)->type
;
1216 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1217 doc
: /* Return the connection type of PROCESS.
1218 The value is either the symbol `real', `network', or `serial'.
1219 PROCESS may be a process, a buffer, the name of a process or buffer, or
1220 nil, indicating the current buffer's process. */)
1221 (Lisp_Object process
)
1224 proc
= get_process (process
);
1225 return XPROCESS (proc
)->type
;
1228 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1230 doc
: /* Convert network ADDRESS from internal format to a string.
1231 A 4 or 5 element vector represents an IPv4 address (with port number).
1232 An 8 or 9 element vector represents an IPv6 address (with port number).
1233 If optional second argument OMIT-PORT is non-nil, don't include a port
1234 number in the string, even when present in ADDRESS.
1235 Returns nil if format of ADDRESS is invalid. */)
1236 (Lisp_Object address
, Lisp_Object omit_port
)
1241 if (STRINGP (address
)) /* AF_LOCAL */
1244 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1246 register struct Lisp_Vector
*p
= XVECTOR (address
);
1247 ptrdiff_t size
= p
->header
.size
;
1248 Lisp_Object args
[10];
1251 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1253 args
[0] = build_string ("%d.%d.%d.%d");
1258 args
[0] = build_string ("%d.%d.%d.%d:%d");
1261 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1263 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1268 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1274 for (i
= 0; i
< nargs
; i
++)
1276 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1279 if (nargs
<= 5 /* IPv4 */
1280 && i
< 4 /* host, not port */
1281 && XINT (p
->contents
[i
]) > 255)
1284 args
[i
+1] = p
->contents
[i
];
1287 return Fformat (nargs
+1, args
);
1290 if (CONSP (address
))
1292 Lisp_Object args
[2];
1293 args
[0] = build_string ("<Family %d>");
1294 args
[1] = Fcar (address
);
1295 return Fformat (2, args
);
1301 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1302 doc
: /* Return a list of all processes. */)
1305 return Fmapcar (Qcdr
, Vprocess_alist
);
1308 /* Starting asynchronous inferior processes. */
1310 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1312 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1313 doc
: /* Start a program in a subprocess. Return the process object for it.
1314 NAME is name for process. It is modified if necessary to make it unique.
1315 BUFFER is the buffer (or buffer name) to associate with the process.
1317 Process output (both standard output and standard error streams) goes
1318 at end of BUFFER, unless you specify an output stream or filter
1319 function to handle the output. BUFFER may also be nil, meaning that
1320 this process is not associated with any buffer.
1322 PROGRAM is the program file name. It is searched for in `exec-path'
1323 (which see). If nil, just associate a pty with the buffer. Remaining
1324 arguments are strings to give program as arguments.
1326 If you want to separate standard output from standard error, invoke
1327 the command through a shell and redirect one of them using the shell
1330 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1331 (ptrdiff_t nargs
, Lisp_Object
*args
)
1333 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1334 register unsigned char **new_argv
;
1336 ptrdiff_t count
= SPECPDL_INDEX ();
1340 buffer
= Fget_buffer_create (buffer
);
1342 /* Make sure that the child will be able to chdir to the current
1343 buffer's current directory, or its unhandled equivalent. We
1344 can't just have the child check for an error when it does the
1345 chdir, since it's in a vfork.
1347 We have to GCPRO around this because Fexpand_file_name and
1348 Funhandled_file_name_directory might call a file name handling
1349 function. The argument list is protected by the caller, so all
1350 we really have to worry about is buffer. */
1352 struct gcpro gcpro1
, gcpro2
;
1354 current_dir
= BVAR (current_buffer
, directory
);
1356 GCPRO2 (buffer
, current_dir
);
1358 current_dir
= Funhandled_file_name_directory (current_dir
);
1359 if (NILP (current_dir
))
1360 /* If the file name handler says that current_dir is unreachable, use
1361 a sensible default. */
1362 current_dir
= build_string ("~/");
1363 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1364 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1365 report_file_error ("Setting current directory",
1366 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1372 CHECK_STRING (name
);
1376 if (!NILP (program
))
1377 CHECK_STRING (program
);
1379 proc
= make_process (name
);
1380 /* If an error occurs and we can't start the process, we want to
1381 remove it from the process list. This means that each error
1382 check in create_process doesn't need to call remove_process
1383 itself; it's all taken care of here. */
1384 record_unwind_protect (start_process_unwind
, proc
);
1386 pset_childp (XPROCESS (proc
), Qt
);
1387 pset_plist (XPROCESS (proc
), Qnil
);
1388 pset_type (XPROCESS (proc
), Qreal
);
1389 pset_buffer (XPROCESS (proc
), buffer
);
1390 pset_sentinel (XPROCESS (proc
), Qnil
);
1391 pset_filter (XPROCESS (proc
), Qnil
);
1392 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1395 /* AKA GNUTLS_INITSTAGE(proc). */
1396 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1397 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1400 #ifdef ADAPTIVE_READ_BUFFERING
1401 XPROCESS (proc
)->adaptive_read_buffering
1402 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1403 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1406 /* Make the process marker point into the process buffer (if any). */
1407 if (BUFFERP (buffer
))
1408 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1409 BUF_ZV (XBUFFER (buffer
)),
1410 BUF_ZV_BYTE (XBUFFER (buffer
)));
1413 /* Decide coding systems for communicating with the process. Here
1414 we don't setup the structure coding_system nor pay attention to
1415 unibyte mode. They are done in create_process. */
1417 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1418 Lisp_Object coding_systems
= Qt
;
1419 Lisp_Object val
, *args2
;
1420 struct gcpro gcpro1
, gcpro2
;
1422 val
= Vcoding_system_for_read
;
1425 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1426 args2
[0] = Qstart_process
;
1427 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1428 GCPRO2 (proc
, current_dir
);
1429 if (!NILP (program
))
1430 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1432 if (CONSP (coding_systems
))
1433 val
= XCAR (coding_systems
);
1434 else if (CONSP (Vdefault_process_coding_system
))
1435 val
= XCAR (Vdefault_process_coding_system
);
1437 pset_decode_coding_system (XPROCESS (proc
), val
);
1439 val
= Vcoding_system_for_write
;
1442 if (EQ (coding_systems
, Qt
))
1444 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1445 args2
[0] = Qstart_process
;
1446 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1447 GCPRO2 (proc
, current_dir
);
1448 if (!NILP (program
))
1449 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1452 if (CONSP (coding_systems
))
1453 val
= XCDR (coding_systems
);
1454 else if (CONSP (Vdefault_process_coding_system
))
1455 val
= XCDR (Vdefault_process_coding_system
);
1457 pset_encode_coding_system (XPROCESS (proc
), val
);
1458 /* Note: At this moment, the above coding system may leave
1459 text-conversion or eol-conversion unspecified. They will be
1460 decided after we read output from the process and decode it by
1461 some coding system, or just before we actually send a text to
1466 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1467 XPROCESS (proc
)->decoding_carryover
= 0;
1468 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1470 XPROCESS (proc
)->inherit_coding_system_flag
1471 = !(NILP (buffer
) || !inherit_process_coding_system
);
1473 if (!NILP (program
))
1475 /* If program file name is not absolute, search our path for it.
1476 Put the name we will really use in TEM. */
1477 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1478 && !(SCHARS (program
) > 1
1479 && IS_DEVICE_SEP (SREF (program
, 1))))
1481 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1484 GCPRO4 (name
, program
, buffer
, current_dir
);
1485 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1488 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1489 tem
= Fexpand_file_name (tem
, Qnil
);
1493 if (!NILP (Ffile_directory_p (program
)))
1494 error ("Specified program for new process is a directory");
1498 /* If program file name starts with /: for quoting a magic name,
1500 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1501 && SREF (tem
, 1) == ':')
1502 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1505 Lisp_Object arg_encoding
= Qnil
;
1506 struct gcpro gcpro1
;
1509 /* Encode the file name and put it in NEW_ARGV.
1510 That's where the child will use it to execute the program. */
1511 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1513 /* Here we encode arguments by the coding system used for sending
1514 data to the process. We don't support using different coding
1515 systems for encoding arguments and for encoding data sent to the
1518 for (i
= 3; i
< nargs
; i
++)
1520 tem
= Fcons (args
[i
], tem
);
1521 CHECK_STRING (XCAR (tem
));
1522 if (STRING_MULTIBYTE (XCAR (tem
)))
1524 if (NILP (arg_encoding
))
1525 arg_encoding
= (complement_process_encoding_system
1526 (XPROCESS (proc
)->encode_coding_system
));
1528 code_convert_string_norecord
1529 (XCAR (tem
), arg_encoding
, 1));
1536 /* Now that everything is encoded we can collect the strings into
1538 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1539 new_argv
[nargs
- 2] = 0;
1541 for (i
= nargs
- 2; i
-- != 0; )
1543 new_argv
[i
] = SDATA (XCAR (tem
));
1547 create_process (proc
, (char **) new_argv
, current_dir
);
1552 return unbind_to (count
, proc
);
1555 /* This function is the unwind_protect form for Fstart_process. If
1556 PROC doesn't have its pid set, then we know someone has signaled
1557 an error and the process wasn't started successfully, so we should
1558 remove it from the process list. */
1560 start_process_unwind (Lisp_Object proc
)
1562 if (!PROCESSP (proc
))
1565 /* Was PROC started successfully?
1566 -2 is used for a pty with no process, eg for gdb. */
1567 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1568 remove_process (proc
);
1574 create_process_1 (struct atimer
*timer
)
1576 /* Nothing to do. */
1581 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1583 int inchannel
, outchannel
;
1586 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1587 int wait_child_setup
[2];
1592 /* Use volatile to protect variables from being clobbered by vfork. */
1593 volatile int forkin
, forkout
;
1594 volatile int pty_flag
= 0;
1595 volatile Lisp_Object lisp_pty_name
= Qnil
;
1596 volatile Lisp_Object encoded_current_dir
;
1597 #if HAVE_WORKING_VFORK
1598 char **volatile save_environ
;
1601 inchannel
= outchannel
= -1;
1604 if (!NILP (Vprocess_connection_type
))
1605 outchannel
= inchannel
= allocate_pty ();
1609 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1610 /* On most USG systems it does not work to open the pty's tty here,
1611 then close it and reopen it in the child. */
1613 /* Don't let this terminal become our controlling terminal
1614 (in case we don't have one). */
1615 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1617 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1620 report_file_error ("Opening pty", Qnil
);
1622 forkin
= forkout
= -1;
1623 #endif /* not USG, or USG_SUBTTY_WORKS */
1625 lisp_pty_name
= build_string (pty_name
);
1628 #endif /* HAVE_PTYS */
1633 report_file_error ("Creating pipe", Qnil
);
1639 emacs_close (inchannel
);
1640 emacs_close (forkout
);
1641 report_file_error ("Creating pipe", Qnil
);
1647 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1651 tem
= pipe (wait_child_setup
);
1653 report_file_error ("Creating pipe", Qnil
);
1654 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1656 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1659 emacs_close (wait_child_setup
[0]);
1660 emacs_close (wait_child_setup
[1]);
1661 report_file_error ("Setting file descriptor flags", Qnil
);
1667 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1668 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1671 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1672 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1676 /* Record this as an active process, with its channels.
1677 As a result, child_setup will close Emacs's side of the pipes. */
1678 chan_process
[inchannel
] = process
;
1679 XPROCESS (process
)->infd
= inchannel
;
1680 XPROCESS (process
)->outfd
= outchannel
;
1682 /* Previously we recorded the tty descriptor used in the subprocess.
1683 It was only used for getting the foreground tty process, so now
1684 we just reopen the device (see emacs_get_tty_pgrp) as this is
1685 more portable (see USG_SUBTTY_WORKS above). */
1687 XPROCESS (process
)->pty_flag
= pty_flag
;
1688 pset_status (XPROCESS (process
), Qrun
);
1690 FD_SET (inchannel
, &input_wait_mask
);
1691 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1692 if (inchannel
> max_process_desc
)
1693 max_process_desc
= inchannel
;
1695 /* This may signal an error. */
1696 setup_process_coding_systems (process
);
1698 encoded_current_dir
= ENCODE_FILE (current_dir
);
1703 /* Block SIGCHLD until we have a chance to store the new fork's
1704 pid in its process structure. */
1705 sigemptyset (&blocked
);
1706 sigaddset (&blocked
, SIGCHLD
);
1707 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1710 #if HAVE_WORKING_VFORK
1711 /* child_setup must clobber environ on systems with true vfork.
1712 Protect it from permanent change. */
1713 save_environ
= environ
;
1719 #endif /* not WINDOWSNT */
1721 int xforkin
= forkin
;
1722 int xforkout
= forkout
;
1724 /* Make the pty be the controlling terminal of the process. */
1726 /* First, disconnect its current controlling terminal. */
1727 /* We tried doing setsid only if pty_flag, but it caused
1728 process_set_signal to fail on SGI when using a pipe. */
1730 /* Make the pty's terminal the controlling terminal. */
1731 if (pty_flag
&& xforkin
>= 0)
1734 /* We ignore the return value
1735 because faith@cs.unc.edu says that is necessary on Linux. */
1736 ioctl (xforkin
, TIOCSCTTY
, 0);
1739 #if defined (LDISC1)
1740 if (pty_flag
&& xforkin
>= 0)
1743 tcgetattr (xforkin
, &t
);
1745 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1746 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1749 #if defined (NTTYDISC) && defined (TIOCSETD)
1750 if (pty_flag
&& xforkin
>= 0)
1752 /* Use new line discipline. */
1753 int ldisc
= NTTYDISC
;
1754 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1759 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1760 can do TIOCSPGRP only to the process's controlling tty. */
1763 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1764 I can't test it since I don't have 4.3. */
1765 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1768 ioctl (j
, TIOCNOTTY
, 0);
1772 #endif /* TIOCNOTTY */
1774 #if !defined (DONT_REOPEN_PTY)
1775 /*** There is a suggestion that this ought to be a
1776 conditional on TIOCSPGRP, or !defined TIOCSCTTY.
1777 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1778 that system does seem to need this code, even though
1779 both TIOCSCTTY is defined. */
1780 /* Now close the pty (if we had it open) and reopen it.
1781 This makes the pty the controlling terminal of the subprocess. */
1785 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1788 emacs_close (xforkin
);
1789 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1793 emacs_write (1, "Couldn't open the pty terminal ", 31);
1794 emacs_write (1, pty_name
, strlen (pty_name
));
1795 emacs_write (1, "\n", 1);
1800 #endif /* not DONT_REOPEN_PTY */
1802 #ifdef SETUP_SLAVE_PTY
1807 #endif /* SETUP_SLAVE_PTY */
1809 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1810 Now reenable it in the child, so it will die when we want it to. */
1812 signal (SIGHUP
, SIG_DFL
);
1814 #endif /* HAVE_PTYS */
1816 signal (SIGINT
, SIG_DFL
);
1817 signal (SIGQUIT
, SIG_DFL
);
1819 /* Emacs ignores SIGPIPE, but the child should not. */
1820 signal (SIGPIPE
, SIG_DFL
);
1823 /* Stop blocking signals in the child. */
1824 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1828 child_setup_tty (xforkout
);
1830 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1831 new_argv
, 1, encoded_current_dir
);
1832 #else /* not WINDOWSNT */
1834 emacs_close (wait_child_setup
[0]);
1836 child_setup (xforkin
, xforkout
, xforkout
,
1837 new_argv
, 1, encoded_current_dir
);
1838 #endif /* not WINDOWSNT */
1841 /* Back in the parent process. */
1843 #if HAVE_WORKING_VFORK
1844 environ
= save_environ
;
1847 XPROCESS (process
)->pid
= pid
;
1849 XPROCESS (process
)->alive
= 1;
1851 /* Stop blocking signals in the parent. */
1853 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1860 emacs_close (forkin
);
1861 if (forkin
!= forkout
&& forkout
>= 0)
1862 emacs_close (forkout
);
1866 /* vfork succeeded. */
1869 register_child (pid
, inchannel
);
1870 #endif /* WINDOWSNT */
1872 /* If the subfork execv fails, and it exits,
1873 this close hangs. I don't know why.
1874 So have an interrupt jar it loose. */
1876 struct atimer
*timer
;
1877 EMACS_TIME offset
= make_emacs_time (1, 0);
1880 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1883 emacs_close (forkin
);
1885 cancel_atimer (timer
);
1889 if (forkin
!= forkout
&& forkout
>= 0)
1890 emacs_close (forkout
);
1892 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1894 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1895 /* Wait for child_setup to complete in case that vfork is
1896 actually defined as fork. The descriptor wait_child_setup[1]
1897 of a pipe is closed at the child side either by close-on-exec
1898 on successful execvp or the _exit call in child_setup. */
1902 emacs_close (wait_child_setup
[1]);
1903 emacs_read (wait_child_setup
[0], &dummy
, 1);
1904 emacs_close (wait_child_setup
[0]);
1909 /* Now generate the error if vfork failed. */
1911 report_file_error ("Doing vfork", Qnil
);
1915 create_pty (Lisp_Object process
)
1917 int inchannel
, outchannel
;
1920 inchannel
= outchannel
= -1;
1923 if (!NILP (Vprocess_connection_type
))
1924 outchannel
= inchannel
= allocate_pty ();
1928 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1929 /* On most USG systems it does not work to open the pty's tty here,
1930 then close it and reopen it in the child. */
1932 /* Don't let this terminal become our controlling terminal
1933 (in case we don't have one). */
1934 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1936 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1939 report_file_error ("Opening pty", Qnil
);
1940 #if defined (DONT_REOPEN_PTY)
1941 /* In the case that vfork is defined as fork, the parent process
1942 (Emacs) may send some data before the child process completes
1943 tty options setup. So we setup tty before forking. */
1944 child_setup_tty (forkout
);
1945 #endif /* DONT_REOPEN_PTY */
1946 #endif /* not USG, or USG_SUBTTY_WORKS */
1949 #endif /* HAVE_PTYS */
1952 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1953 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1956 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1957 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1961 /* Record this as an active process, with its channels.
1962 As a result, child_setup will close Emacs's side of the pipes. */
1963 chan_process
[inchannel
] = process
;
1964 XPROCESS (process
)->infd
= inchannel
;
1965 XPROCESS (process
)->outfd
= outchannel
;
1967 /* Previously we recorded the tty descriptor used in the subprocess.
1968 It was only used for getting the foreground tty process, so now
1969 we just reopen the device (see emacs_get_tty_pgrp) as this is
1970 more portable (see USG_SUBTTY_WORKS above). */
1972 XPROCESS (process
)->pty_flag
= pty_flag
;
1973 pset_status (XPROCESS (process
), Qrun
);
1974 setup_process_coding_systems (process
);
1976 FD_SET (inchannel
, &input_wait_mask
);
1977 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1978 if (inchannel
> max_process_desc
)
1979 max_process_desc
= inchannel
;
1981 XPROCESS (process
)->pid
= -2;
1984 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
1987 pset_tty_name (XPROCESS (process
), Qnil
);
1991 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1992 The address family of sa is not included in the result. */
1995 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
1997 Lisp_Object address
;
2000 register struct Lisp_Vector
*p
;
2002 /* Workaround for a bug in getsockname on BSD: Names bound to
2003 sockets in the UNIX domain are inaccessible; getsockname returns
2004 a zero length name. */
2005 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2006 return empty_unibyte_string
;
2008 switch (sa
->sa_family
)
2012 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2013 len
= sizeof (sin
->sin_addr
) + 1;
2014 address
= Fmake_vector (make_number (len
), Qnil
);
2015 p
= XVECTOR (address
);
2016 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2017 cp
= (unsigned char *) &sin
->sin_addr
;
2023 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2024 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2025 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2026 address
= Fmake_vector (make_number (len
), Qnil
);
2027 p
= XVECTOR (address
);
2028 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2029 for (i
= 0; i
< len
; i
++)
2030 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2034 #ifdef HAVE_LOCAL_SOCKETS
2037 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2038 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2039 if (sockun
->sun_path
[i
] == 0)
2041 return make_unibyte_string (sockun
->sun_path
, i
);
2045 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2046 address
= Fcons (make_number (sa
->sa_family
),
2047 Fmake_vector (make_number (len
), Qnil
));
2048 p
= XVECTOR (XCDR (address
));
2049 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2055 p
->contents
[i
++] = make_number (*cp
++);
2061 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2064 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2066 register struct Lisp_Vector
*p
;
2068 if (VECTORP (address
))
2070 p
= XVECTOR (address
);
2071 if (p
->header
.size
== 5)
2074 return sizeof (struct sockaddr_in
);
2077 else if (p
->header
.size
== 9)
2079 *familyp
= AF_INET6
;
2080 return sizeof (struct sockaddr_in6
);
2084 #ifdef HAVE_LOCAL_SOCKETS
2085 else if (STRINGP (address
))
2087 *familyp
= AF_LOCAL
;
2088 return sizeof (struct sockaddr_un
);
2091 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2092 && VECTORP (XCDR (address
)))
2094 struct sockaddr
*sa
;
2095 *familyp
= XINT (XCAR (address
));
2096 p
= XVECTOR (XCDR (address
));
2097 return p
->header
.size
+ sizeof (sa
->sa_family
);
2102 /* Convert an address object (vector or string) to an internal sockaddr.
2104 The address format has been basically validated by
2105 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2106 it could have come from user data. So if FAMILY is not valid,
2107 we return after zeroing *SA. */
2110 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2112 register struct Lisp_Vector
*p
;
2113 register unsigned char *cp
= NULL
;
2117 memset (sa
, 0, len
);
2119 if (VECTORP (address
))
2121 p
= XVECTOR (address
);
2122 if (family
== AF_INET
)
2124 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2125 len
= sizeof (sin
->sin_addr
) + 1;
2126 hostport
= XINT (p
->contents
[--len
]);
2127 sin
->sin_port
= htons (hostport
);
2128 cp
= (unsigned char *)&sin
->sin_addr
;
2129 sa
->sa_family
= family
;
2132 else if (family
== AF_INET6
)
2134 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2135 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2136 len
= sizeof (sin6
->sin6_addr
) + 1;
2137 hostport
= XINT (p
->contents
[--len
]);
2138 sin6
->sin6_port
= htons (hostport
);
2139 for (i
= 0; i
< len
; i
++)
2140 if (INTEGERP (p
->contents
[i
]))
2142 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2145 sa
->sa_family
= family
;
2152 else if (STRINGP (address
))
2154 #ifdef HAVE_LOCAL_SOCKETS
2155 if (family
== AF_LOCAL
)
2157 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2158 cp
= SDATA (address
);
2159 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2160 sockun
->sun_path
[i
] = *cp
++;
2161 sa
->sa_family
= family
;
2168 p
= XVECTOR (XCDR (address
));
2169 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2172 for (i
= 0; i
< len
; i
++)
2173 if (INTEGERP (p
->contents
[i
]))
2174 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2177 #ifdef DATAGRAM_SOCKETS
2178 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2180 doc
: /* Get the current datagram address associated with PROCESS. */)
2181 (Lisp_Object process
)
2185 CHECK_PROCESS (process
);
2187 if (!DATAGRAM_CONN_P (process
))
2190 channel
= XPROCESS (process
)->infd
;
2191 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2192 datagram_address
[channel
].len
);
2195 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2197 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2198 Returns nil upon error setting address, ADDRESS otherwise. */)
2199 (Lisp_Object process
, Lisp_Object address
)
2204 CHECK_PROCESS (process
);
2206 if (!DATAGRAM_CONN_P (process
))
2209 channel
= XPROCESS (process
)->infd
;
2211 len
= get_lisp_to_sockaddr_size (address
, &family
);
2212 if (datagram_address
[channel
].len
!= len
)
2214 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2220 static const struct socket_options
{
2221 /* The name of this option. Should be lowercase version of option
2222 name without SO_ prefix. */
2224 /* Option level SOL_... */
2226 /* Option number SO_... */
2228 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2229 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2230 } socket_options
[] =
2232 #ifdef SO_BINDTODEVICE
2233 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2236 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2239 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2242 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2245 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2248 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2251 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2254 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2256 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2259 /* Set option OPT to value VAL on socket S.
2261 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2262 Signals an error if setting a known option fails.
2266 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2269 const struct socket_options
*sopt
;
2274 name
= SSDATA (SYMBOL_NAME (opt
));
2275 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2276 if (strcmp (name
, sopt
->name
) == 0)
2279 switch (sopt
->opttype
)
2284 optval
= NILP (val
) ? 0 : 1;
2285 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2286 &optval
, sizeof (optval
));
2293 if (TYPE_RANGED_INTEGERP (int, val
))
2294 optval
= XINT (val
);
2296 error ("Bad option value for %s", name
);
2297 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2298 &optval
, sizeof (optval
));
2302 #ifdef SO_BINDTODEVICE
2305 char devname
[IFNAMSIZ
+1];
2307 /* This is broken, at least in the Linux 2.4 kernel.
2308 To unbind, the arg must be a zero integer, not the empty string.
2309 This should work on all systems. KFS. 2003-09-23. */
2310 memset (devname
, 0, sizeof devname
);
2313 char *arg
= SSDATA (val
);
2314 int len
= min (strlen (arg
), IFNAMSIZ
);
2315 memcpy (devname
, arg
, len
);
2317 else if (!NILP (val
))
2318 error ("Bad option value for %s", name
);
2319 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2328 struct linger linger
;
2331 linger
.l_linger
= 0;
2332 if (TYPE_RANGED_INTEGERP (int, val
))
2333 linger
.l_linger
= XINT (val
);
2335 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2336 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2337 &linger
, sizeof (linger
));
2347 report_file_error ("Cannot set network option",
2348 Fcons (opt
, Fcons (val
, Qnil
)));
2349 return (1 << sopt
->optbit
);
2353 DEFUN ("set-network-process-option",
2354 Fset_network_process_option
, Sset_network_process_option
,
2356 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2357 See `make-network-process' for a list of options and values.
2358 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2359 OPTION is not a supported option, return nil instead; otherwise return t. */)
2360 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2363 struct Lisp_Process
*p
;
2365 CHECK_PROCESS (process
);
2366 p
= XPROCESS (process
);
2367 if (!NETCONN1_P (p
))
2368 error ("Process is not a network process");
2372 error ("Process is not running");
2374 if (set_socket_option (s
, option
, value
))
2376 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2380 if (NILP (no_error
))
2381 error ("Unknown or unsupported option");
2387 DEFUN ("serial-process-configure",
2388 Fserial_process_configure
,
2389 Sserial_process_configure
,
2391 doc
: /* Configure speed, bytesize, etc. of a serial process.
2393 Arguments are specified as keyword/argument pairs. Attributes that
2394 are not given are re-initialized from the process's current
2395 configuration (available via the function `process-contact') or set to
2396 reasonable default values. The following arguments are defined:
2402 -- Any of these arguments can be given to identify the process that is
2403 to be configured. If none of these arguments is given, the current
2404 buffer's process is used.
2406 :speed SPEED -- SPEED is the speed of the serial port in bits per
2407 second, also called baud rate. Any value can be given for SPEED, but
2408 most serial ports work only at a few defined values between 1200 and
2409 115200, with 9600 being the most common value. If SPEED is nil, the
2410 serial port is not configured any further, i.e., all other arguments
2411 are ignored. This may be useful for special serial ports such as
2412 Bluetooth-to-serial converters which can only be configured through AT
2413 commands. A value of nil for SPEED can be used only when passed
2414 through `make-serial-process' or `serial-term'.
2416 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2417 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2419 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2420 `odd' (use odd parity), or the symbol `even' (use even parity). If
2421 PARITY is not given, no parity is used.
2423 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2424 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2425 is not given or nil, 1 stopbit is used.
2427 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2428 flowcontrol to be used, which is either nil (don't use flowcontrol),
2429 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2430 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2431 flowcontrol is used.
2433 `serial-process-configure' is called by `make-serial-process' for the
2434 initial configuration of the serial port.
2438 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2440 \(serial-process-configure
2441 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2443 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2445 usage: (serial-process-configure &rest ARGS) */)
2446 (ptrdiff_t nargs
, Lisp_Object
*args
)
2448 struct Lisp_Process
*p
;
2449 Lisp_Object contact
= Qnil
;
2450 Lisp_Object proc
= Qnil
;
2451 struct gcpro gcpro1
;
2453 contact
= Flist (nargs
, args
);
2456 proc
= Fplist_get (contact
, QCprocess
);
2458 proc
= Fplist_get (contact
, QCname
);
2460 proc
= Fplist_get (contact
, QCbuffer
);
2462 proc
= Fplist_get (contact
, QCport
);
2463 proc
= get_process (proc
);
2464 p
= XPROCESS (proc
);
2465 if (!EQ (p
->type
, Qserial
))
2466 error ("Not a serial process");
2468 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2474 serial_configure (p
, contact
);
2480 /* Used by make-serial-process to recover from errors. */
2482 make_serial_process_unwind (Lisp_Object proc
)
2484 if (!PROCESSP (proc
))
2486 remove_process (proc
);
2490 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2492 doc
: /* Create and return a serial port process.
2494 In Emacs, serial port connections are represented by process objects,
2495 so input and output work as for subprocesses, and `delete-process'
2496 closes a serial port connection. However, a serial process has no
2497 process id, it cannot be signaled, and the status codes are different
2498 from normal processes.
2500 `make-serial-process' creates a process and a buffer, on which you
2501 probably want to use `process-send-string'. Try \\[serial-term] for
2502 an interactive terminal. See below for examples.
2504 Arguments are specified as keyword/argument pairs. The following
2505 arguments are defined:
2507 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2508 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2509 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2510 the backslashes in strings).
2512 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2513 which this function calls.
2515 :name NAME -- NAME is the name of the process. If NAME is not given,
2516 the value of PORT is used.
2518 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2519 with the process. Process output goes at the end of that buffer,
2520 unless you specify an output stream or filter function to handle the
2521 output. If BUFFER is not given, the value of NAME is used.
2523 :coding CODING -- If CODING is a symbol, it specifies the coding
2524 system used for both reading and writing for this process. If CODING
2525 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2526 ENCODING is used for writing.
2528 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2529 the process is running. If BOOL is not given, query before exiting.
2531 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2532 In the stopped state, a serial process does not accept incoming data,
2533 but you can send outgoing data. The stopped state is cleared by
2534 `continue-process' and set by `stop-process'.
2536 :filter FILTER -- Install FILTER as the process filter.
2538 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2540 :plist PLIST -- Install PLIST as the initial plist of the process.
2546 -- This function calls `serial-process-configure' to handle these
2549 The original argument list, possibly modified by later configuration,
2550 is available via the function `process-contact'.
2554 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2556 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2558 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2560 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2562 usage: (make-serial-process &rest ARGS) */)
2563 (ptrdiff_t nargs
, Lisp_Object
*args
)
2566 Lisp_Object proc
, contact
, port
;
2567 struct Lisp_Process
*p
;
2568 struct gcpro gcpro1
;
2569 Lisp_Object name
, buffer
;
2570 Lisp_Object tem
, val
;
2571 ptrdiff_t specpdl_count
= -1;
2576 contact
= Flist (nargs
, args
);
2579 port
= Fplist_get (contact
, QCport
);
2581 error ("No port specified");
2582 CHECK_STRING (port
);
2584 if (NILP (Fplist_member (contact
, QCspeed
)))
2585 error (":speed not specified");
2586 if (!NILP (Fplist_get (contact
, QCspeed
)))
2587 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2589 name
= Fplist_get (contact
, QCname
);
2592 CHECK_STRING (name
);
2593 proc
= make_process (name
);
2594 specpdl_count
= SPECPDL_INDEX ();
2595 record_unwind_protect (make_serial_process_unwind
, proc
);
2596 p
= XPROCESS (proc
);
2598 fd
= serial_open (SSDATA (port
));
2601 if (fd
> max_process_desc
)
2602 max_process_desc
= fd
;
2603 chan_process
[fd
] = proc
;
2605 buffer
= Fplist_get (contact
, QCbuffer
);
2608 buffer
= Fget_buffer_create (buffer
);
2609 pset_buffer (p
, buffer
);
2611 pset_childp (p
, contact
);
2612 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2613 pset_type (p
, Qserial
);
2614 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2615 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2617 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2618 p
->kill_without_query
= 1;
2619 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2620 pset_command (p
, Qt
);
2623 if (!EQ (p
->command
, Qt
))
2625 FD_SET (fd
, &input_wait_mask
);
2626 FD_SET (fd
, &non_keyboard_wait_mask
);
2629 if (BUFFERP (buffer
))
2631 set_marker_both (p
->mark
, buffer
,
2632 BUF_ZV (XBUFFER (buffer
)),
2633 BUF_ZV_BYTE (XBUFFER (buffer
)));
2636 tem
= Fplist_member (contact
, QCcoding
);
2637 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2643 val
= XCAR (XCDR (tem
));
2647 else if (!NILP (Vcoding_system_for_read
))
2648 val
= Vcoding_system_for_read
;
2649 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2650 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2652 pset_decode_coding_system (p
, val
);
2657 val
= XCAR (XCDR (tem
));
2661 else if (!NILP (Vcoding_system_for_write
))
2662 val
= Vcoding_system_for_write
;
2663 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2664 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2666 pset_encode_coding_system (p
, val
);
2668 setup_process_coding_systems (proc
);
2669 pset_decoding_buf (p
, empty_unibyte_string
);
2670 p
->decoding_carryover
= 0;
2671 pset_encoding_buf (p
, empty_unibyte_string
);
2672 p
->inherit_coding_system_flag
2673 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2675 Fserial_process_configure (nargs
, args
);
2677 specpdl_ptr
= specpdl
+ specpdl_count
;
2683 /* Create a network stream/datagram client/server process. Treated
2684 exactly like a normal process when reading and writing. Primary
2685 differences are in status display and process deletion. A network
2686 connection has no PID; you cannot signal it. All you can do is
2687 stop/continue it and deactivate/close it via delete-process */
2689 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2691 doc
: /* Create and return a network server or client process.
2693 In Emacs, network connections are represented by process objects, so
2694 input and output work as for subprocesses and `delete-process' closes
2695 a network connection. However, a network process has no process id,
2696 it cannot be signaled, and the status codes are different from normal
2699 Arguments are specified as keyword/argument pairs. The following
2700 arguments are defined:
2702 :name NAME -- NAME is name for process. It is modified if necessary
2705 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2706 with the process. Process output goes at end of that buffer, unless
2707 you specify an output stream or filter function to handle the output.
2708 BUFFER may be also nil, meaning that this process is not associated
2711 :host HOST -- HOST is name of the host to connect to, or its IP
2712 address. The symbol `local' specifies the local host. If specified
2713 for a server process, it must be a valid name or address for the local
2714 host, and only clients connecting to that address will be accepted.
2716 :service SERVICE -- SERVICE is name of the service desired, or an
2717 integer specifying a port number to connect to. If SERVICE is t,
2718 a random port number is selected for the server. (If Emacs was
2719 compiled with getaddrinfo, a port number can also be specified as a
2720 string, e.g. "80", as well as an integer. This is not portable.)
2722 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2723 stream type connection, `datagram' creates a datagram type connection,
2724 `seqpacket' creates a reliable datagram connection.
2726 :family FAMILY -- FAMILY is the address (and protocol) family for the
2727 service specified by HOST and SERVICE. The default (nil) is to use
2728 whatever address family (IPv4 or IPv6) that is defined for the host
2729 and port number specified by HOST and SERVICE. Other address families
2731 local -- for a local (i.e. UNIX) address specified by SERVICE.
2732 ipv4 -- use IPv4 address family only.
2733 ipv6 -- use IPv6 address family only.
2735 :local ADDRESS -- ADDRESS is the local address used for the connection.
2736 This parameter is ignored when opening a client process. When specified
2737 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2739 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2740 connection. This parameter is ignored when opening a stream server
2741 process. For a datagram server process, it specifies the initial
2742 setting of the remote datagram address. When specified for a client
2743 process, the FAMILY, HOST, and SERVICE args are ignored.
2745 The format of ADDRESS depends on the address family:
2746 - An IPv4 address is represented as an vector of integers [A B C D P]
2747 corresponding to numeric IP address A.B.C.D and port number P.
2748 - A local address is represented as a string with the address in the
2749 local address space.
2750 - An "unsupported family" address is represented by a cons (F . AV)
2751 where F is the family number and AV is a vector containing the socket
2752 address data with one element per address data byte. Do not rely on
2753 this format in portable code, as it may depend on implementation
2754 defined constants, data sizes, and data structure alignment.
2756 :coding CODING -- If CODING is a symbol, it specifies the coding
2757 system used for both reading and writing for this process. If CODING
2758 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2759 ENCODING is used for writing.
2761 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2762 return without waiting for the connection to complete; instead, the
2763 sentinel function will be called with second arg matching "open" (if
2764 successful) or "failed" when the connect completes. Default is to use
2765 a blocking connect (i.e. wait) for stream type connections.
2767 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2768 running when Emacs is exited.
2770 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2771 In the stopped state, a server process does not accept new
2772 connections, and a client process does not handle incoming traffic.
2773 The stopped state is cleared by `continue-process' and set by
2776 :filter FILTER -- Install FILTER as the process filter.
2778 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2779 process filter are multibyte, otherwise they are unibyte.
2780 If this keyword is not specified, the strings are multibyte if
2781 the default value of `enable-multibyte-characters' is non-nil.
2783 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2785 :log LOG -- Install LOG as the server process log function. This
2786 function is called when the server accepts a network connection from a
2787 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2788 is the server process, CLIENT is the new process for the connection,
2789 and MESSAGE is a string.
2791 :plist PLIST -- Install PLIST as the new process' initial plist.
2793 :server QLEN -- if QLEN is non-nil, create a server process for the
2794 specified FAMILY, SERVICE, and connection type (stream or datagram).
2795 If QLEN is an integer, it is used as the max. length of the server's
2796 pending connection queue (also known as the backlog); the default
2797 queue length is 5. Default is to create a client process.
2799 The following network options can be specified for this connection:
2801 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2802 :dontroute BOOL -- Only send to directly connected hosts.
2803 :keepalive BOOL -- Send keep-alive messages on network stream.
2804 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2805 :oobinline BOOL -- Place out-of-band data in receive data stream.
2806 :priority INT -- Set protocol defined priority for sent packets.
2807 :reuseaddr BOOL -- Allow reusing a recently used local address
2808 (this is allowed by default for a server process).
2809 :bindtodevice NAME -- bind to interface NAME. Using this may require
2810 special privileges on some systems.
2812 Consult the relevant system programmer's manual pages for more
2813 information on using these options.
2816 A server process will listen for and accept connections from clients.
2817 When a client connection is accepted, a new network process is created
2818 for the connection with the following parameters:
2820 - The client's process name is constructed by concatenating the server
2821 process' NAME and a client identification string.
2822 - If the FILTER argument is non-nil, the client process will not get a
2823 separate process buffer; otherwise, the client's process buffer is a newly
2824 created buffer named after the server process' BUFFER name or process
2825 NAME concatenated with the client identification string.
2826 - The connection type and the process filter and sentinel parameters are
2827 inherited from the server process' TYPE, FILTER and SENTINEL.
2828 - The client process' contact info is set according to the client's
2829 addressing information (typically an IP address and a port number).
2830 - The client process' plist is initialized from the server's plist.
2832 Notice that the FILTER and SENTINEL args are never used directly by
2833 the server process. Also, the BUFFER argument is not used directly by
2834 the server process, but via the optional :log function, accepted (and
2835 failed) connections may be logged in the server process' buffer.
2837 The original argument list, modified with the actual connection
2838 information, is available via the `process-contact' function.
2840 usage: (make-network-process &rest ARGS) */)
2841 (ptrdiff_t nargs
, Lisp_Object
*args
)
2844 Lisp_Object contact
;
2845 struct Lisp_Process
*p
;
2846 #ifdef HAVE_GETADDRINFO
2847 struct addrinfo ai
, *res
, *lres
;
2848 struct addrinfo hints
;
2849 const char *portstring
;
2851 #else /* HAVE_GETADDRINFO */
2852 struct _emacs_addrinfo
2858 struct sockaddr
*ai_addr
;
2859 struct _emacs_addrinfo
*ai_next
;
2861 #endif /* HAVE_GETADDRINFO */
2862 struct sockaddr_in address_in
;
2863 #ifdef HAVE_LOCAL_SOCKETS
2864 struct sockaddr_un address_un
;
2869 int s
= -1, outch
, inch
;
2870 struct gcpro gcpro1
;
2871 ptrdiff_t count
= SPECPDL_INDEX ();
2873 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2875 Lisp_Object name
, buffer
, host
, service
, address
;
2876 Lisp_Object filter
, sentinel
;
2877 int is_non_blocking_client
= 0;
2878 int is_server
= 0, backlog
= 5;
2885 /* Save arguments for process-contact and clone-process. */
2886 contact
= Flist (nargs
, args
);
2890 /* Ensure socket support is loaded if available. */
2891 init_winsock (TRUE
);
2894 /* :type TYPE (nil: stream, datagram */
2895 tem
= Fplist_get (contact
, QCtype
);
2897 socktype
= SOCK_STREAM
;
2898 #ifdef DATAGRAM_SOCKETS
2899 else if (EQ (tem
, Qdatagram
))
2900 socktype
= SOCK_DGRAM
;
2902 #ifdef HAVE_SEQPACKET
2903 else if (EQ (tem
, Qseqpacket
))
2904 socktype
= SOCK_SEQPACKET
;
2907 error ("Unsupported connection type");
2910 tem
= Fplist_get (contact
, QCserver
);
2913 /* Don't support network sockets when non-blocking mode is
2914 not available, since a blocked Emacs is not useful. */
2915 #if !O_NONBLOCK && !O_NDELAY
2916 error ("Network servers not supported");
2919 if (TYPE_RANGED_INTEGERP (int, tem
))
2920 backlog
= XINT (tem
);
2924 /* Make QCaddress an alias for :local (server) or :remote (client). */
2925 QCaddress
= is_server
? QClocal
: QCremote
;
2928 if (!is_server
&& socktype
!= SOCK_DGRAM
2929 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2931 #ifndef NON_BLOCKING_CONNECT
2932 error ("Non-blocking connect not supported");
2934 is_non_blocking_client
= 1;
2938 name
= Fplist_get (contact
, QCname
);
2939 buffer
= Fplist_get (contact
, QCbuffer
);
2940 filter
= Fplist_get (contact
, QCfilter
);
2941 sentinel
= Fplist_get (contact
, QCsentinel
);
2943 CHECK_STRING (name
);
2945 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2946 ai
.ai_socktype
= socktype
;
2951 /* :local ADDRESS or :remote ADDRESS */
2952 address
= Fplist_get (contact
, QCaddress
);
2953 if (!NILP (address
))
2955 host
= service
= Qnil
;
2957 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2958 error ("Malformed :address");
2959 ai
.ai_family
= family
;
2960 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2961 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2965 /* :family FAMILY -- nil (for Inet), local, or integer. */
2966 tem
= Fplist_get (contact
, QCfamily
);
2969 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2975 #ifdef HAVE_LOCAL_SOCKETS
2976 else if (EQ (tem
, Qlocal
))
2980 else if (EQ (tem
, Qipv6
))
2983 else if (EQ (tem
, Qipv4
))
2985 else if (TYPE_RANGED_INTEGERP (int, tem
))
2986 family
= XINT (tem
);
2988 error ("Unknown address family");
2990 ai
.ai_family
= family
;
2992 /* :service SERVICE -- string, integer (port number), or t (random port). */
2993 service
= Fplist_get (contact
, QCservice
);
2995 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2996 host
= Fplist_get (contact
, QChost
);
2999 if (EQ (host
, Qlocal
))
3000 /* Depending on setup, "localhost" may map to different IPv4 and/or
3001 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3002 host
= build_string ("127.0.0.1");
3003 CHECK_STRING (host
);
3006 #ifdef HAVE_LOCAL_SOCKETS
3007 if (family
== AF_LOCAL
)
3011 message (":family local ignores the :host \"%s\" property",
3013 contact
= Fplist_put (contact
, QChost
, Qnil
);
3016 CHECK_STRING (service
);
3017 memset (&address_un
, 0, sizeof address_un
);
3018 address_un
.sun_family
= AF_LOCAL
;
3019 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3020 error ("Service name too long");
3021 strcpy (address_un
.sun_path
, SSDATA (service
));
3022 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3023 ai
.ai_addrlen
= sizeof address_un
;
3028 /* Slow down polling to every ten seconds.
3029 Some kernels have a bug which causes retrying connect to fail
3030 after a connect. Polling can interfere with gethostbyname too. */
3031 #ifdef POLL_FOR_INPUT
3032 if (socktype
!= SOCK_DGRAM
)
3034 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3035 bind_polling_period (10);
3039 #ifdef HAVE_GETADDRINFO
3040 /* If we have a host, use getaddrinfo to resolve both host and service.
3041 Otherwise, use getservbyname to lookup the service. */
3045 /* SERVICE can either be a string or int.
3046 Convert to a C string for later use by getaddrinfo. */
3047 if (EQ (service
, Qt
))
3049 else if (INTEGERP (service
))
3051 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3052 portstring
= portbuf
;
3056 CHECK_STRING (service
);
3057 portstring
= SSDATA (service
);
3062 memset (&hints
, 0, sizeof (hints
));
3064 hints
.ai_family
= family
;
3065 hints
.ai_socktype
= socktype
;
3066 hints
.ai_protocol
= 0;
3068 #ifdef HAVE_RES_INIT
3072 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3074 #ifdef HAVE_GAI_STRERROR
3075 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3077 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3083 #endif /* HAVE_GETADDRINFO */
3085 /* We end up here if getaddrinfo is not defined, or in case no hostname
3086 has been specified (e.g. for a local server process). */
3088 if (EQ (service
, Qt
))
3090 else if (INTEGERP (service
))
3091 port
= htons ((unsigned short) XINT (service
));
3094 struct servent
*svc_info
;
3095 CHECK_STRING (service
);
3096 svc_info
= getservbyname (SSDATA (service
),
3097 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3099 error ("Unknown service: %s", SDATA (service
));
3100 port
= svc_info
->s_port
;
3103 memset (&address_in
, 0, sizeof address_in
);
3104 address_in
.sin_family
= family
;
3105 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3106 address_in
.sin_port
= port
;
3108 #ifndef HAVE_GETADDRINFO
3111 struct hostent
*host_info_ptr
;
3113 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3114 as it may `hang' Emacs for a very long time. */
3118 #ifdef HAVE_RES_INIT
3122 host_info_ptr
= gethostbyname (SDATA (host
));
3127 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3128 host_info_ptr
->h_length
);
3129 family
= host_info_ptr
->h_addrtype
;
3130 address_in
.sin_family
= family
;
3133 /* Attempt to interpret host as numeric inet address */
3135 unsigned long numeric_addr
;
3136 numeric_addr
= inet_addr (SSDATA (host
));
3137 if (numeric_addr
== -1)
3138 error ("Unknown host \"%s\"", SDATA (host
));
3140 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3141 sizeof (address_in
.sin_addr
));
3145 #endif /* not HAVE_GETADDRINFO */
3147 ai
.ai_family
= family
;
3148 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3149 ai
.ai_addrlen
= sizeof address_in
;
3153 /* Do this in case we never enter the for-loop below. */
3154 count1
= SPECPDL_INDEX ();
3157 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3166 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3173 #ifdef DATAGRAM_SOCKETS
3174 if (!is_server
&& socktype
== SOCK_DGRAM
)
3176 #endif /* DATAGRAM_SOCKETS */
3178 #ifdef NON_BLOCKING_CONNECT
3179 if (is_non_blocking_client
)
3182 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3184 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3196 /* Make us close S if quit. */
3197 record_unwind_protect (close_file_unwind
, make_number (s
));
3199 /* Parse network options in the arg list.
3200 We simply ignore anything which isn't a known option (including other keywords).
3201 An error is signaled if setting a known option fails. */
3202 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3203 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3207 /* Configure as a server socket. */
3209 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3210 explicit :reuseaddr key to override this. */
3211 #ifdef HAVE_LOCAL_SOCKETS
3212 if (family
!= AF_LOCAL
)
3214 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3217 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3218 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3221 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3222 report_file_error ("Cannot bind server socket", Qnil
);
3224 #ifdef HAVE_GETSOCKNAME
3225 if (EQ (service
, Qt
))
3227 struct sockaddr_in sa1
;
3228 socklen_t len1
= sizeof (sa1
);
3229 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3231 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3232 service
= make_number (ntohs (sa1
.sin_port
));
3233 contact
= Fplist_put (contact
, QCservice
, service
);
3238 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3239 report_file_error ("Cannot listen on server socket", Qnil
);
3247 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3250 if (ret
== 0 || xerrno
== EISCONN
)
3252 /* The unwind-protect will be discarded afterwards.
3253 Likewise for immediate_quit. */
3257 #ifdef NON_BLOCKING_CONNECT
3259 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3263 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3270 if (xerrno
== EINTR
)
3272 /* Unlike most other syscalls connect() cannot be called
3273 again. (That would return EALREADY.) The proper way to
3274 wait for completion is pselect(). */
3282 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3288 report_file_error ("select failed", Qnil
);
3292 len
= sizeof xerrno
;
3293 eassert (FD_ISSET (s
, &fdset
));
3294 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3295 report_file_error ("getsockopt failed", Qnil
);
3297 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3301 #endif /* !WINDOWSNT */
3305 /* Discard the unwind protect closing S. */
3306 specpdl_ptr
= specpdl
+ count1
;
3311 if (xerrno
== EINTR
)
3318 #ifdef DATAGRAM_SOCKETS
3319 if (socktype
== SOCK_DGRAM
)
3321 if (datagram_address
[s
].sa
)
3323 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3324 datagram_address
[s
].len
= lres
->ai_addrlen
;
3328 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3329 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3332 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3333 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3334 conv_lisp_to_sockaddr (rfamily
, remote
,
3335 datagram_address
[s
].sa
, rlen
);
3339 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3342 contact
= Fplist_put (contact
, QCaddress
,
3343 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3344 #ifdef HAVE_GETSOCKNAME
3347 struct sockaddr_in sa1
;
3348 socklen_t len1
= sizeof (sa1
);
3349 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3350 contact
= Fplist_put (contact
, QClocal
,
3351 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3358 #ifdef HAVE_GETADDRINFO
3367 /* Discard the unwind protect for closing S, if any. */
3368 specpdl_ptr
= specpdl
+ count1
;
3370 /* Unwind bind_polling_period and request_sigio. */
3371 unbind_to (count
, Qnil
);
3375 /* If non-blocking got this far - and failed - assume non-blocking is
3376 not supported after all. This is probably a wrong assumption, but
3377 the normal blocking calls to open-network-stream handles this error
3379 if (is_non_blocking_client
)
3384 report_file_error ("make server process failed", contact
);
3386 report_file_error ("make client process failed", contact
);
3393 buffer
= Fget_buffer_create (buffer
);
3394 proc
= make_process (name
);
3396 chan_process
[inch
] = proc
;
3399 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3402 fcntl (inch
, F_SETFL
, O_NDELAY
);
3406 p
= XPROCESS (proc
);
3408 pset_childp (p
, contact
);
3409 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3410 pset_type (p
, Qnetwork
);
3412 pset_buffer (p
, buffer
);
3413 pset_sentinel (p
, sentinel
);
3414 pset_filter (p
, filter
);
3415 pset_log (p
, Fplist_get (contact
, QClog
));
3416 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3417 p
->kill_without_query
= 1;
3418 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3419 pset_command (p
, Qt
);
3423 if (is_server
&& socktype
!= SOCK_DGRAM
)
3424 pset_status (p
, Qlisten
);
3426 /* Make the process marker point into the process buffer (if any). */
3427 if (BUFFERP (buffer
))
3428 set_marker_both (p
->mark
, buffer
,
3429 BUF_ZV (XBUFFER (buffer
)),
3430 BUF_ZV_BYTE (XBUFFER (buffer
)));
3432 #ifdef NON_BLOCKING_CONNECT
3433 if (is_non_blocking_client
)
3435 /* We may get here if connect did succeed immediately. However,
3436 in that case, we still need to signal this like a non-blocking
3438 pset_status (p
, Qconnect
);
3439 if (!FD_ISSET (inch
, &connect_wait_mask
))
3441 FD_SET (inch
, &connect_wait_mask
);
3442 FD_SET (inch
, &write_mask
);
3443 num_pending_connects
++;
3448 /* A server may have a client filter setting of Qt, but it must
3449 still listen for incoming connects unless it is stopped. */
3450 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3451 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3453 FD_SET (inch
, &input_wait_mask
);
3454 FD_SET (inch
, &non_keyboard_wait_mask
);
3457 if (inch
> max_process_desc
)
3458 max_process_desc
= inch
;
3460 tem
= Fplist_member (contact
, QCcoding
);
3461 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3462 tem
= Qnil
; /* No error message (too late!). */
3465 /* Setup coding systems for communicating with the network stream. */
3466 struct gcpro gcpro1
;
3467 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3468 Lisp_Object coding_systems
= Qt
;
3469 Lisp_Object fargs
[5], val
;
3473 val
= XCAR (XCDR (tem
));
3477 else if (!NILP (Vcoding_system_for_read
))
3478 val
= Vcoding_system_for_read
;
3479 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3480 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3481 /* We dare not decode end-of-line format by setting VAL to
3482 Qraw_text, because the existing Emacs Lisp libraries
3483 assume that they receive bare code including a sequence of
3488 if (NILP (host
) || NILP (service
))
3489 coding_systems
= Qnil
;
3492 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3493 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3495 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3498 if (CONSP (coding_systems
))
3499 val
= XCAR (coding_systems
);
3500 else if (CONSP (Vdefault_process_coding_system
))
3501 val
= XCAR (Vdefault_process_coding_system
);
3505 pset_decode_coding_system (p
, val
);
3509 val
= XCAR (XCDR (tem
));
3513 else if (!NILP (Vcoding_system_for_write
))
3514 val
= Vcoding_system_for_write
;
3515 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3519 if (EQ (coding_systems
, Qt
))
3521 if (NILP (host
) || NILP (service
))
3522 coding_systems
= Qnil
;
3525 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3526 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3528 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3532 if (CONSP (coding_systems
))
3533 val
= XCDR (coding_systems
);
3534 else if (CONSP (Vdefault_process_coding_system
))
3535 val
= XCDR (Vdefault_process_coding_system
);
3539 pset_encode_coding_system (p
, val
);
3541 setup_process_coding_systems (proc
);
3543 pset_decoding_buf (p
, empty_unibyte_string
);
3544 p
->decoding_carryover
= 0;
3545 pset_encoding_buf (p
, empty_unibyte_string
);
3547 p
->inherit_coding_system_flag
3548 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3555 #if defined (HAVE_NET_IF_H)
3558 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3559 doc
: /* Return an alist of all network interfaces and their network address.
3560 Each element is a cons, the car of which is a string containing the
3561 interface name, and the cdr is the network address in internal
3562 format; see the description of ADDRESS in `make-network-process'. */)
3565 struct ifconf ifconf
;
3566 struct ifreq
*ifreq
;
3568 ptrdiff_t buf_size
= 512;
3572 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3578 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3579 ifconf
.ifc_buf
= buf
;
3580 ifconf
.ifc_len
= buf_size
;
3581 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3588 while (ifconf
.ifc_len
== buf_size
);
3593 ifreq
= ifconf
.ifc_req
;
3594 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3596 struct ifreq
*ifq
= ifreq
;
3597 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3598 #define SIZEOF_IFREQ(sif) \
3599 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3600 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3602 int len
= SIZEOF_IFREQ (ifq
);
3604 int len
= sizeof (*ifreq
);
3606 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3608 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3610 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3613 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3614 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3615 res
= Fcons (Fcons (build_string (namebuf
),
3616 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3617 sizeof (struct sockaddr
))),
3624 #endif /* SIOCGIFCONF */
3626 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3630 const char *flag_sym
;
3633 static const struct ifflag_def ifflag_table
[] = {
3637 #ifdef IFF_BROADCAST
3638 { IFF_BROADCAST
, "broadcast" },
3641 { IFF_DEBUG
, "debug" },
3644 { IFF_LOOPBACK
, "loopback" },
3646 #ifdef IFF_POINTOPOINT
3647 { IFF_POINTOPOINT
, "pointopoint" },
3650 { IFF_RUNNING
, "running" },
3653 { IFF_NOARP
, "noarp" },
3656 { IFF_PROMISC
, "promisc" },
3658 #ifdef IFF_NOTRAILERS
3659 #ifdef NS_IMPL_COCOA
3660 /* Really means smart, notrailers is obsolete */
3661 { IFF_NOTRAILERS
, "smart" },
3663 { IFF_NOTRAILERS
, "notrailers" },
3667 { IFF_ALLMULTI
, "allmulti" },
3670 { IFF_MASTER
, "master" },
3673 { IFF_SLAVE
, "slave" },
3675 #ifdef IFF_MULTICAST
3676 { IFF_MULTICAST
, "multicast" },
3679 { IFF_PORTSEL
, "portsel" },
3681 #ifdef IFF_AUTOMEDIA
3682 { IFF_AUTOMEDIA
, "automedia" },
3685 { IFF_DYNAMIC
, "dynamic" },
3688 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3691 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3694 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3697 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3700 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3705 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3706 doc
: /* Return information about network interface named IFNAME.
3707 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3708 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3709 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3710 FLAGS is the current flags of the interface. */)
3711 (Lisp_Object ifname
)
3714 Lisp_Object res
= Qnil
;
3718 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3719 && defined HAVE_GETIFADDRS && defined LLADDR)
3720 struct ifaddrs
*ifap
;
3723 CHECK_STRING (ifname
);
3725 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3726 error ("interface name too long");
3727 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3729 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3734 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3735 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3737 int flags
= rq
.ifr_flags
;
3738 const struct ifflag_def
*fp
;
3741 /* If flags is smaller than int (i.e. short) it may have the high bit set
3742 due to IFF_MULTICAST. In that case, sign extending it into
3744 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3745 flags
= (unsigned short) rq
.ifr_flags
;
3748 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3750 if (flags
& fp
->flag_bit
)
3752 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3753 flags
-= fp
->flag_bit
;
3756 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3760 elt
= Fcons (make_number (fnum
), elt
);
3765 res
= Fcons (elt
, res
);
3768 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3769 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3771 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3772 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3776 for (n
= 0; n
< 6; n
++)
3777 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3778 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3780 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3781 if (getifaddrs (&ifap
) != -1)
3783 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3784 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3787 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3789 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3790 unsigned char linkaddr
[6];
3793 if (it
->ifa_addr
->sa_family
!= AF_LINK
3794 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3795 || sdl
->sdl_alen
!= 6)
3798 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3799 for (n
= 0; n
< 6; n
++)
3800 p
->contents
[n
] = make_number (linkaddr
[n
]);
3802 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3806 #ifdef HAVE_FREEIFADDRS
3810 #endif /* HAVE_GETIFADDRS && LLADDR */
3812 res
= Fcons (elt
, res
);
3815 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3816 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3819 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3820 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3822 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3826 res
= Fcons (elt
, res
);
3829 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3830 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3833 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3836 res
= Fcons (elt
, res
);
3839 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3840 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3843 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3846 res
= Fcons (elt
, res
);
3850 return any
? res
: Qnil
;
3853 #endif /* defined (HAVE_NET_IF_H) */
3855 /* Turn off input and output for process PROC. */
3858 deactivate_process (Lisp_Object proc
)
3860 register int inchannel
, outchannel
;
3861 register struct Lisp_Process
*p
= XPROCESS (proc
);
3864 /* Delete GnuTLS structures in PROC, if any. */
3865 emacs_gnutls_deinit (proc
);
3866 #endif /* HAVE_GNUTLS */
3868 inchannel
= p
->infd
;
3869 outchannel
= p
->outfd
;
3871 #ifdef ADAPTIVE_READ_BUFFERING
3872 if (p
->read_output_delay
> 0)
3874 if (--process_output_delay_count
< 0)
3875 process_output_delay_count
= 0;
3876 p
->read_output_delay
= 0;
3877 p
->read_output_skip
= 0;
3883 /* Beware SIGCHLD hereabouts. */
3884 flush_pending_output (inchannel
);
3885 emacs_close (inchannel
);
3886 if (outchannel
>= 0 && outchannel
!= inchannel
)
3887 emacs_close (outchannel
);
3891 #ifdef DATAGRAM_SOCKETS
3892 if (DATAGRAM_CHAN_P (inchannel
))
3894 xfree (datagram_address
[inchannel
].sa
);
3895 datagram_address
[inchannel
].sa
= 0;
3896 datagram_address
[inchannel
].len
= 0;
3899 chan_process
[inchannel
] = Qnil
;
3900 FD_CLR (inchannel
, &input_wait_mask
);
3901 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3902 #ifdef NON_BLOCKING_CONNECT
3903 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3905 FD_CLR (inchannel
, &connect_wait_mask
);
3906 FD_CLR (inchannel
, &write_mask
);
3907 if (--num_pending_connects
< 0)
3911 if (inchannel
== max_process_desc
)
3914 /* We just closed the highest-numbered process input descriptor,
3915 so recompute the highest-numbered one now. */
3916 max_process_desc
= 0;
3917 for (i
= 0; i
< MAXDESC
; i
++)
3918 if (!NILP (chan_process
[i
]))
3919 max_process_desc
= i
;
3925 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3927 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3928 It is read into the process' buffers or given to their filter functions.
3929 Non-nil arg PROCESS means do not return until some output has been received
3932 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3933 and milliseconds to wait; return after that much time whether or not
3934 there is any subprocess output. If SECONDS is a floating point number,
3935 it specifies a fractional number of seconds to wait.
3936 The MILLISEC argument is obsolete and should be avoided.
3938 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3939 from PROCESS, suspending reading output from other processes.
3940 If JUST-THIS-ONE is an integer, don't run any timers either.
3941 Return non-nil if we received any output before the timeout expired. */)
3942 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3947 if (! NILP (process
))
3948 CHECK_PROCESS (process
);
3950 just_this_one
= Qnil
;
3952 if (!NILP (millisec
))
3953 { /* Obsolete calling convention using integers rather than floats. */
3954 CHECK_NUMBER (millisec
);
3956 seconds
= make_float (XINT (millisec
) / 1000.0);
3959 CHECK_NUMBER (seconds
);
3960 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3967 if (!NILP (seconds
))
3969 if (INTEGERP (seconds
))
3971 if (0 < XINT (seconds
))
3973 secs
= XINT (seconds
);
3977 else if (FLOATP (seconds
))
3979 if (0 < XFLOAT_DATA (seconds
))
3981 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
3982 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
3983 nsecs
= EMACS_NSECS (t
);
3987 wrong_type_argument (Qnumberp
, seconds
);
3989 else if (! NILP (process
))
3993 (wait_reading_process_output (secs
, nsecs
, 0, 0,
3995 !NILP (process
) ? XPROCESS (process
) : NULL
,
3996 NILP (just_this_one
) ? 0 :
3997 !INTEGERP (just_this_one
) ? 1 : -1)
4001 /* Accept a connection for server process SERVER on CHANNEL. */
4003 static int connect_counter
= 0;
4006 server_accept_connection (Lisp_Object server
, int channel
)
4008 Lisp_Object proc
, caller
, name
, buffer
;
4009 Lisp_Object contact
, host
, service
;
4010 struct Lisp_Process
*ps
= XPROCESS (server
);
4011 struct Lisp_Process
*p
;
4015 struct sockaddr_in in
;
4017 struct sockaddr_in6 in6
;
4019 #ifdef HAVE_LOCAL_SOCKETS
4020 struct sockaddr_un un
;
4023 socklen_t len
= sizeof saddr
;
4025 s
= accept (channel
, &saddr
.sa
, &len
);
4034 if (code
== EWOULDBLOCK
)
4038 if (!NILP (ps
->log
))
4039 call3 (ps
->log
, server
, Qnil
,
4040 concat3 (build_string ("accept failed with code"),
4041 Fnumber_to_string (make_number (code
)),
4042 build_string ("\n")));
4048 /* Setup a new process to handle the connection. */
4050 /* Generate a unique identification of the caller, and build contact
4051 information for this process. */
4054 switch (saddr
.sa
.sa_family
)
4058 Lisp_Object args
[5];
4059 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4060 args
[0] = build_string ("%d.%d.%d.%d");
4061 args
[1] = make_number (*ip
++);
4062 args
[2] = make_number (*ip
++);
4063 args
[3] = make_number (*ip
++);
4064 args
[4] = make_number (*ip
++);
4065 host
= Fformat (5, args
);
4066 service
= make_number (ntohs (saddr
.in
.sin_port
));
4068 args
[0] = build_string (" <%s:%d>");
4071 caller
= Fformat (3, args
);
4078 Lisp_Object args
[9];
4079 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4081 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4082 for (i
= 0; i
< 8; i
++)
4083 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4084 host
= Fformat (9, args
);
4085 service
= make_number (ntohs (saddr
.in
.sin_port
));
4087 args
[0] = build_string (" <[%s]:%d>");
4090 caller
= Fformat (3, args
);
4095 #ifdef HAVE_LOCAL_SOCKETS
4099 caller
= Fnumber_to_string (make_number (connect_counter
));
4100 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4104 /* Create a new buffer name for this process if it doesn't have a
4105 filter. The new buffer name is based on the buffer name or
4106 process name of the server process concatenated with the caller
4109 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4113 buffer
= ps
->buffer
;
4115 buffer
= Fbuffer_name (buffer
);
4120 buffer
= concat2 (buffer
, caller
);
4121 buffer
= Fget_buffer_create (buffer
);
4125 /* Generate a unique name for the new server process. Combine the
4126 server process name with the caller identification. */
4128 name
= concat2 (ps
->name
, caller
);
4129 proc
= make_process (name
);
4131 chan_process
[s
] = proc
;
4134 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4137 fcntl (s
, F_SETFL
, O_NDELAY
);
4141 p
= XPROCESS (proc
);
4143 /* Build new contact information for this setup. */
4144 contact
= Fcopy_sequence (ps
->childp
);
4145 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4146 contact
= Fplist_put (contact
, QChost
, host
);
4147 if (!NILP (service
))
4148 contact
= Fplist_put (contact
, QCservice
, service
);
4149 contact
= Fplist_put (contact
, QCremote
,
4150 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4151 #ifdef HAVE_GETSOCKNAME
4153 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4154 contact
= Fplist_put (contact
, QClocal
,
4155 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4158 pset_childp (p
, contact
);
4159 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4160 pset_type (p
, Qnetwork
);
4162 pset_buffer (p
, buffer
);
4163 pset_sentinel (p
, ps
->sentinel
);
4164 pset_filter (p
, ps
->filter
);
4165 pset_command (p
, Qnil
);
4169 pset_status (p
, Qrun
);
4171 /* Client processes for accepted connections are not stopped initially. */
4172 if (!EQ (p
->filter
, Qt
))
4174 FD_SET (s
, &input_wait_mask
);
4175 FD_SET (s
, &non_keyboard_wait_mask
);
4178 if (s
> max_process_desc
)
4179 max_process_desc
= s
;
4181 /* Setup coding system for new process based on server process.
4182 This seems to be the proper thing to do, as the coding system
4183 of the new process should reflect the settings at the time the
4184 server socket was opened; not the current settings. */
4186 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4187 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4188 setup_process_coding_systems (proc
);
4190 pset_decoding_buf (p
, empty_unibyte_string
);
4191 p
->decoding_carryover
= 0;
4192 pset_encoding_buf (p
, empty_unibyte_string
);
4194 p
->inherit_coding_system_flag
4195 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4197 if (!NILP (ps
->log
))
4198 call3 (ps
->log
, server
, proc
,
4199 concat3 (build_string ("accept from "),
4200 (STRINGP (host
) ? host
: build_string ("-")),
4201 build_string ("\n")));
4203 if (!NILP (p
->sentinel
))
4204 exec_sentinel (proc
,
4205 concat3 (build_string ("open from "),
4206 (STRINGP (host
) ? host
: build_string ("-")),
4207 build_string ("\n")));
4210 /* This variable is different from waiting_for_input in keyboard.c.
4211 It is used to communicate to a lisp process-filter/sentinel (via the
4212 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4213 for user-input when that process-filter was called.
4214 waiting_for_input cannot be used as that is by definition 0 when
4215 lisp code is being evalled.
4216 This is also used in record_asynch_buffer_change.
4217 For that purpose, this must be 0
4218 when not inside wait_reading_process_output. */
4219 static int waiting_for_user_input_p
;
4222 wait_reading_process_output_unwind (Lisp_Object data
)
4224 waiting_for_user_input_p
= XINT (data
);
4228 /* This is here so breakpoints can be put on it. */
4230 wait_reading_process_output_1 (void)
4234 /* Read and dispose of subprocess output while waiting for timeout to
4235 elapse and/or keyboard input to be available.
4239 If negative, gobble data immediately available but don't wait for any.
4242 an additional duration to wait, measured in nanoseconds
4243 If TIME_LIMIT is zero, then:
4244 If NSECS == 0, there is no limit.
4245 If NSECS > 0, the timeout consists of NSECS only.
4246 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4249 0 to ignore keyboard input, or
4250 1 to return when input is available, or
4251 -1 meaning caller will actually read the input, so don't throw to
4252 the quit handler, or
4254 DO_DISPLAY means redisplay should be done to show subprocess
4255 output that arrives.
4257 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4258 (and gobble terminal input into the buffer if any arrives).
4260 If WAIT_PROC is specified, wait until something arrives from that
4261 process. The return value is true if we read some input from
4264 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4265 (suspending output from other processes). A negative value
4266 means don't run any timers either.
4268 If WAIT_PROC is specified, then the function returns true if we
4269 received input from that process before the timeout elapsed.
4270 Otherwise, return true if we received input from any process. */
4273 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4275 Lisp_Object wait_for_cell
,
4276 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4278 register int channel
, nfds
;
4279 SELECT_TYPE Available
;
4280 SELECT_TYPE Writeok
;
4282 int check_delay
, no_avail
;
4285 EMACS_TIME timeout
, end_time
;
4286 int wait_channel
= -1;
4287 int got_some_input
= 0;
4288 ptrdiff_t count
= SPECPDL_INDEX ();
4290 FD_ZERO (&Available
);
4293 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4294 && !(CONSP (wait_proc
->status
)
4295 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4296 message ("Blocking call to accept-process-output with quit inhibited!!");
4298 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4299 if (wait_proc
!= NULL
)
4300 wait_channel
= wait_proc
->infd
;
4302 record_unwind_protect (wait_reading_process_output_unwind
,
4303 make_number (waiting_for_user_input_p
));
4304 waiting_for_user_input_p
= read_kbd
;
4311 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4312 time_limit
= TYPE_MAXIMUM (time_t);
4314 /* Since we may need to wait several times,
4315 compute the absolute time to return at. */
4316 if (time_limit
|| 0 < nsecs
)
4318 timeout
= make_emacs_time (time_limit
, nsecs
);
4319 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4324 int timeout_reduced_for_timers
= 0;
4326 /* If calling from keyboard input, do not quit
4327 since we want to return C-g as an input character.
4328 Otherwise, do pending quit if requested. */
4331 else if (pending_signals
)
4332 process_pending_signals ();
4334 /* Exit now if the cell we're waiting for became non-nil. */
4335 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4338 /* Compute time from now till when time limit is up */
4339 /* Exit if already run out */
4342 /* A negative timeout means
4343 gobble output available now
4344 but don't wait at all. */
4346 timeout
= make_emacs_time (0, 0);
4348 else if (time_limit
|| 0 < nsecs
)
4350 EMACS_TIME now
= current_emacs_time ();
4351 if (EMACS_TIME_LE (end_time
, now
))
4353 timeout
= sub_emacs_time (end_time
, now
);
4357 timeout
= make_emacs_time (100000, 0);
4360 /* Normally we run timers here.
4361 But not if wait_for_cell; in those cases,
4362 the wait is supposed to be short,
4363 and those callers cannot handle running arbitrary Lisp code here. */
4364 if (NILP (wait_for_cell
)
4365 && just_wait_proc
>= 0)
4367 EMACS_TIME timer_delay
;
4371 unsigned old_timers_run
= timers_run
;
4372 struct buffer
*old_buffer
= current_buffer
;
4373 Lisp_Object old_window
= selected_window
;
4375 timer_delay
= timer_check ();
4377 /* If a timer has run, this might have changed buffers
4378 an alike. Make read_key_sequence aware of that. */
4379 if (timers_run
!= old_timers_run
4380 && (old_buffer
!= current_buffer
4381 || !EQ (old_window
, selected_window
))
4382 && waiting_for_user_input_p
== -1)
4383 record_asynch_buffer_change ();
4385 if (timers_run
!= old_timers_run
&& do_display
)
4386 /* We must retry, since a timer may have requeued itself
4387 and that could alter the time_delay. */
4388 redisplay_preserve_echo_area (9);
4392 while (!detect_input_pending ());
4394 /* If there is unread keyboard input, also return. */
4396 && requeued_events_pending_p ())
4399 /* A negative timeout means do not wait at all. */
4402 if (EMACS_TIME_VALID_P (timer_delay
))
4404 if (EMACS_TIME_LT (timer_delay
, timeout
))
4406 timeout
= timer_delay
;
4407 timeout_reduced_for_timers
= 1;
4412 /* This is so a breakpoint can be put here. */
4413 wait_reading_process_output_1 ();
4418 /* Cause C-g and alarm signals to take immediate action,
4419 and cause input available signals to zero out timeout.
4421 It is important that we do this before checking for process
4422 activity. If we get a SIGCHLD after the explicit checks for
4423 process activity, timeout is the only way we will know. */
4425 set_waiting_for_input (&timeout
);
4427 /* If status of something has changed, and no input is
4428 available, notify the user of the change right away. After
4429 this explicit check, we'll let the SIGCHLD handler zap
4430 timeout to get our attention. */
4431 if (update_tick
!= process_tick
)
4436 if (kbd_on_hold_p ())
4439 Atemp
= input_wait_mask
;
4442 timeout
= make_emacs_time (0, 0);
4443 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4445 #ifdef NON_BLOCKING_CONNECT
4446 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4450 NULL
, &timeout
, NULL
)
4453 /* It's okay for us to do this and then continue with
4454 the loop, since timeout has already been zeroed out. */
4455 clear_waiting_for_input ();
4456 status_notify (NULL
);
4457 if (do_display
) redisplay_preserve_echo_area (13);
4461 /* Don't wait for output from a non-running process. Just
4462 read whatever data has already been received. */
4463 if (wait_proc
&& wait_proc
->raw_status_new
)
4464 update_status (wait_proc
);
4466 && ! EQ (wait_proc
->status
, Qrun
)
4467 && ! EQ (wait_proc
->status
, Qconnect
))
4469 int nread
, total_nread
= 0;
4471 clear_waiting_for_input ();
4472 XSETPROCESS (proc
, wait_proc
);
4474 /* Read data from the process, until we exhaust it. */
4475 while (wait_proc
->infd
>= 0)
4477 nread
= read_process_output (proc
, wait_proc
->infd
);
4484 total_nread
+= nread
;
4488 else if (nread
== -1 && EIO
== errno
)
4492 else if (nread
== -1 && EAGAIN
== errno
)
4496 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4500 if (total_nread
> 0 && do_display
)
4501 redisplay_preserve_echo_area (10);
4506 /* Wait till there is something to do */
4508 if (wait_proc
&& just_wait_proc
)
4510 if (wait_proc
->infd
< 0) /* Terminated */
4512 FD_SET (wait_proc
->infd
, &Available
);
4516 else if (!NILP (wait_for_cell
))
4518 Available
= non_process_wait_mask
;
4525 Available
= non_keyboard_wait_mask
;
4527 Available
= input_wait_mask
;
4528 Writeok
= write_mask
;
4529 #ifdef SELECT_CANT_DO_WRITE_MASK
4534 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4537 /* If frame size has changed or the window is newly mapped,
4538 redisplay now, before we start to wait. There is a race
4539 condition here; if a SIGIO arrives between now and the select
4540 and indicates that a frame is trashed, the select may block
4541 displaying a trashed screen. */
4542 if (frame_garbaged
&& do_display
)
4544 clear_waiting_for_input ();
4545 redisplay_preserve_echo_area (11);
4547 set_waiting_for_input (&timeout
);
4550 /* Skip the `select' call if input is available and we're
4551 waiting for keyboard input or a cell change (which can be
4552 triggered by processing X events). In the latter case, set
4553 nfds to 1 to avoid breaking the loop. */
4555 if ((read_kbd
|| !NILP (wait_for_cell
))
4556 && detect_input_pending ())
4558 nfds
= read_kbd
? 0 : 1;
4565 #ifdef ADAPTIVE_READ_BUFFERING
4566 /* Set the timeout for adaptive read buffering if any
4567 process has non-zero read_output_skip and non-zero
4568 read_output_delay, and we are not reading output for a
4569 specific wait_channel. It is not executed if
4570 Vprocess_adaptive_read_buffering is nil. */
4571 if (process_output_skip
&& check_delay
> 0)
4573 int nsecs
= EMACS_NSECS (timeout
);
4574 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4575 nsecs
= READ_OUTPUT_DELAY_MAX
;
4576 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4578 proc
= chan_process
[channel
];
4581 /* Find minimum non-zero read_output_delay among the
4582 processes with non-zero read_output_skip. */
4583 if (XPROCESS (proc
)->read_output_delay
> 0)
4586 if (!XPROCESS (proc
)->read_output_skip
)
4588 FD_CLR (channel
, &Available
);
4589 XPROCESS (proc
)->read_output_skip
= 0;
4590 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4591 nsecs
= XPROCESS (proc
)->read_output_delay
;
4594 timeout
= make_emacs_time (0, nsecs
);
4595 process_output_skip
= 0;
4599 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4601 #elif defined (HAVE_NS)
4606 (max (max_process_desc
, max_input_desc
) + 1,
4608 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4609 NULL
, &timeout
, NULL
);
4612 /* GnuTLS buffers data internally. In lowat mode it leaves
4613 some data in the TCP buffers so that select works, but
4614 with custom pull/push functions we need to check if some
4615 data is available in the buffers manually. */
4620 /* We're not waiting on a specific process, so loop
4621 through all the channels and check for data.
4622 This is a workaround needed for some versions of
4623 the gnutls library -- 2.12.14 has been confirmed
4625 http://comments.gmane.org/gmane.emacs.devel/145074 */
4626 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4627 if (! NILP (chan_process
[channel
]))
4629 struct Lisp_Process
*p
=
4630 XPROCESS (chan_process
[channel
]);
4631 if (p
&& p
->gnutls_p
&& p
->infd
4632 && ((emacs_gnutls_record_check_pending
4637 FD_SET (p
->infd
, &Available
);
4643 /* Check this specific channel. */
4644 if (wait_proc
->gnutls_p
/* Check for valid process. */
4645 /* Do we have pending data? */
4646 && ((emacs_gnutls_record_check_pending
4647 (wait_proc
->gnutls_state
))
4651 /* Set to Available. */
4652 FD_SET (wait_proc
->infd
, &Available
);
4661 /* Make C-g and alarm signals set flags again */
4662 clear_waiting_for_input ();
4664 /* If we woke up due to SIGWINCH, actually change size now. */
4665 do_pending_window_change (0);
4667 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4668 /* We waited the full specified time, so return now. */
4672 if (xerrno
== EINTR
)
4674 else if (xerrno
== EBADF
)
4677 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4678 the child's closure of the pts gives the parent a SIGHUP, and
4679 the ptc file descriptor is automatically closed,
4680 yielding EBADF here or at select() call above.
4681 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4682 in m/ibmrt-aix.h), and here we just ignore the select error.
4683 Cleanup occurs c/o status_notify after SIGCLD. */
4684 no_avail
= 1; /* Cannot depend on values returned */
4690 error ("select error: %s", emacs_strerror (xerrno
));
4695 FD_ZERO (&Available
);
4699 /* Check for keyboard input */
4700 /* If there is any, return immediately
4701 to give it higher priority than subprocesses */
4705 unsigned old_timers_run
= timers_run
;
4706 struct buffer
*old_buffer
= current_buffer
;
4707 Lisp_Object old_window
= selected_window
;
4710 if (detect_input_pending_run_timers (do_display
))
4712 swallow_events (do_display
);
4713 if (detect_input_pending_run_timers (do_display
))
4717 /* If a timer has run, this might have changed buffers
4718 an alike. Make read_key_sequence aware of that. */
4719 if (timers_run
!= old_timers_run
4720 && waiting_for_user_input_p
== -1
4721 && (old_buffer
!= current_buffer
4722 || !EQ (old_window
, selected_window
)))
4723 record_asynch_buffer_change ();
4729 /* If there is unread keyboard input, also return. */
4731 && requeued_events_pending_p ())
4734 /* If we are not checking for keyboard input now,
4735 do process events (but don't run any timers).
4736 This is so that X events will be processed.
4737 Otherwise they may have to wait until polling takes place.
4738 That would causes delays in pasting selections, for example.
4740 (We used to do this only if wait_for_cell.) */
4741 if (read_kbd
== 0 && detect_input_pending ())
4743 swallow_events (do_display
);
4744 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4745 if (detect_input_pending ())
4750 /* Exit now if the cell we're waiting for became non-nil. */
4751 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4755 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4756 go read it. This can happen with X on BSD after logging out.
4757 In that case, there really is no input and no SIGIO,
4758 but select says there is input. */
4760 if (read_kbd
&& interrupt_input
4761 && keyboard_bit_set (&Available
) && ! noninteractive
)
4762 handle_input_available_signal (SIGIO
);
4766 got_some_input
|= nfds
> 0;
4768 /* If checking input just got us a size-change event from X,
4769 obey it now if we should. */
4770 if (read_kbd
|| ! NILP (wait_for_cell
))
4771 do_pending_window_change (0);
4773 /* Check for data from a process. */
4774 if (no_avail
|| nfds
== 0)
4777 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4779 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4781 && ((d
->condition
& FOR_READ
4782 && FD_ISSET (channel
, &Available
))
4783 || (d
->condition
& FOR_WRITE
4784 && FD_ISSET (channel
, &write_mask
))))
4785 d
->func (channel
, d
->data
);
4788 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4790 if (FD_ISSET (channel
, &Available
)
4791 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4792 && !FD_ISSET (channel
, &non_process_wait_mask
))
4796 /* If waiting for this channel, arrange to return as
4797 soon as no more input to be processed. No more
4799 if (wait_channel
== channel
)
4805 proc
= chan_process
[channel
];
4809 /* If this is a server stream socket, accept connection. */
4810 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4812 server_accept_connection (proc
, channel
);
4816 /* Read data from the process, starting with our
4817 buffered-ahead character if we have one. */
4819 nread
= read_process_output (proc
, channel
);
4822 /* Since read_process_output can run a filter,
4823 which can call accept-process-output,
4824 don't try to read from any other processes
4825 before doing the select again. */
4826 FD_ZERO (&Available
);
4829 redisplay_preserve_echo_area (12);
4832 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4835 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4836 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4838 else if (nread
== -1 && errno
== EAGAIN
)
4842 else if (nread
== -1 && errno
== EAGAIN
)
4844 /* Note that we cannot distinguish between no input
4845 available now and a closed pipe.
4846 With luck, a closed pipe will be accompanied by
4847 subprocess termination and SIGCHLD. */
4848 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4850 #endif /* O_NDELAY */
4851 #endif /* O_NONBLOCK */
4853 /* On some OSs with ptys, when the process on one end of
4854 a pty exits, the other end gets an error reading with
4855 errno = EIO instead of getting an EOF (0 bytes read).
4856 Therefore, if we get an error reading and errno =
4857 EIO, just continue, because the child process has
4858 exited and should clean itself up soon (e.g. when we
4861 However, it has been known to happen that the SIGCHLD
4862 got lost. So raise the signal again just in case.
4864 else if (nread
== -1 && errno
== EIO
)
4866 struct Lisp_Process
*p
= XPROCESS (proc
);
4868 /* Clear the descriptor now, so we only raise the
4870 FD_CLR (channel
, &input_wait_mask
);
4871 FD_CLR (channel
, &non_keyboard_wait_mask
);
4875 /* If the EIO occurs on a pty, the SIGCHLD handler's
4876 waitpid call will not find the process object to
4877 delete. Do it here. */
4878 p
->tick
= ++process_tick
;
4879 pset_status (p
, Qfailed
);
4882 handle_child_signal (SIGCHLD
);
4884 #endif /* HAVE_PTYS */
4885 /* If we can detect process termination, don't consider the
4886 process gone just because its pipe is closed. */
4888 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4893 /* Preserve status of processes already terminated. */
4894 XPROCESS (proc
)->tick
= ++process_tick
;
4895 deactivate_process (proc
);
4896 if (XPROCESS (proc
)->raw_status_new
)
4897 update_status (XPROCESS (proc
));
4898 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4899 pset_status (XPROCESS (proc
),
4900 list2 (Qexit
, make_number (256)));
4903 #ifdef NON_BLOCKING_CONNECT
4904 if (FD_ISSET (channel
, &Writeok
)
4905 && FD_ISSET (channel
, &connect_wait_mask
))
4907 struct Lisp_Process
*p
;
4909 FD_CLR (channel
, &connect_wait_mask
);
4910 FD_CLR (channel
, &write_mask
);
4911 if (--num_pending_connects
< 0)
4914 proc
= chan_process
[channel
];
4918 p
= XPROCESS (proc
);
4921 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4922 So only use it on systems where it is known to work. */
4924 socklen_t xlen
= sizeof (xerrno
);
4925 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4930 struct sockaddr pname
;
4931 int pnamelen
= sizeof (pname
);
4933 /* If connection failed, getpeername will fail. */
4935 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4937 /* Obtain connect failure code through error slippage. */
4940 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4947 p
->tick
= ++process_tick
;
4948 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
4949 deactivate_process (proc
);
4953 pset_status (p
, Qrun
);
4954 /* Execute the sentinel here. If we had relied on
4955 status_notify to do it later, it will read input
4956 from the process before calling the sentinel. */
4957 exec_sentinel (proc
, build_string ("open\n"));
4958 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4960 FD_SET (p
->infd
, &input_wait_mask
);
4961 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4965 #endif /* NON_BLOCKING_CONNECT */
4966 } /* end for each file descriptor */
4967 } /* end while exit conditions not met */
4969 unbind_to (count
, Qnil
);
4971 /* If calling from keyboard input, do not quit
4972 since we want to return C-g as an input character.
4973 Otherwise, do pending quit if requested. */
4976 /* Prevent input_pending from remaining set if we quit. */
4977 clear_input_pending ();
4981 return got_some_input
;
4984 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4987 read_process_output_call (Lisp_Object fun_and_args
)
4989 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4993 read_process_output_error_handler (Lisp_Object error_val
)
4995 cmd_error_internal (error_val
, "error in process filter: ");
4997 update_echo_area ();
4998 Fsleep_for (make_number (2), Qnil
);
5002 /* Read pending output from the process channel,
5003 starting with our buffered-ahead character if we have one.
5004 Yield number of decoded characters read.
5006 This function reads at most 4096 characters.
5007 If you want to read all available subprocess output,
5008 you must call it repeatedly until it returns zero.
5010 The characters read are decoded according to PROC's coding-system
5014 read_process_output (Lisp_Object proc
, register int channel
)
5016 register ssize_t nbytes
;
5018 register Lisp_Object outstream
;
5019 register struct Lisp_Process
*p
= XPROCESS (proc
);
5020 register ptrdiff_t opoint
;
5021 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5022 int carryover
= p
->decoding_carryover
;
5024 ptrdiff_t count
= SPECPDL_INDEX ();
5025 Lisp_Object odeactivate
;
5027 chars
= alloca (carryover
+ readmax
);
5029 /* See the comment above. */
5030 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5032 #ifdef DATAGRAM_SOCKETS
5033 /* We have a working select, so proc_buffered_char is always -1. */
5034 if (DATAGRAM_CHAN_P (channel
))
5036 socklen_t len
= datagram_address
[channel
].len
;
5037 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5038 0, datagram_address
[channel
].sa
, &len
);
5043 int buffered
= 0 <= proc_buffered_char
[channel
];
5046 chars
[carryover
] = proc_buffered_char
[channel
];
5047 proc_buffered_char
[channel
] = -1;
5051 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5052 readmax
- buffered
);
5055 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5056 readmax
- buffered
);
5057 #ifdef ADAPTIVE_READ_BUFFERING
5058 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5060 int delay
= p
->read_output_delay
;
5063 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5066 process_output_delay_count
++;
5067 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5070 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5072 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5074 process_output_delay_count
--;
5076 p
->read_output_delay
= delay
;
5079 p
->read_output_skip
= 1;
5080 process_output_skip
= 1;
5085 nbytes
+= buffered
&& nbytes
<= 0;
5088 p
->decoding_carryover
= 0;
5090 /* At this point, NBYTES holds number of bytes just received
5091 (including the one in proc_buffered_char[channel]). */
5094 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5096 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5099 /* Now set NBYTES how many bytes we must decode. */
5100 nbytes
+= carryover
;
5102 odeactivate
= Vdeactivate_mark
;
5103 /* There's no good reason to let process filters change the current
5104 buffer, and many callers of accept-process-output, sit-for, and
5105 friends don't expect current-buffer to be changed from under them. */
5106 record_unwind_current_buffer ();
5108 /* Read and dispose of the process output. */
5109 outstream
= p
->filter
;
5110 if (!NILP (outstream
))
5113 bool outer_running_asynch_code
= running_asynch_code
;
5114 int waiting
= waiting_for_user_input_p
;
5116 /* No need to gcpro these, because all we do with them later
5117 is test them for EQness, and none of them should be a string. */
5119 Lisp_Object obuffer
, okeymap
;
5120 XSETBUFFER (obuffer
, current_buffer
);
5121 okeymap
= BVAR (current_buffer
, keymap
);
5124 /* We inhibit quit here instead of just catching it so that
5125 hitting ^G when a filter happens to be running won't screw
5127 specbind (Qinhibit_quit
, Qt
);
5128 specbind (Qlast_nonmenu_event
, Qt
);
5130 /* In case we get recursively called,
5131 and we already saved the match data nonrecursively,
5132 save the same match data in safely recursive fashion. */
5133 if (outer_running_asynch_code
)
5136 /* Don't clobber the CURRENT match data, either! */
5137 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5138 restore_search_regs ();
5139 record_unwind_save_match_data ();
5140 Fset_match_data (tem
, Qt
);
5143 /* For speed, if a search happens within this code,
5144 save the match data in a special nonrecursive fashion. */
5145 running_asynch_code
= 1;
5147 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5148 text
= coding
->dst_object
;
5149 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5150 /* A new coding system might be found. */
5151 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5153 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5155 /* Don't call setup_coding_system for
5156 proc_decode_coding_system[channel] here. It is done in
5157 detect_coding called via decode_coding above. */
5159 /* If a coding system for encoding is not yet decided, we set
5160 it as the same as coding-system for decoding.
5162 But, before doing that we must check if
5163 proc_encode_coding_system[p->outfd] surely points to a
5164 valid memory because p->outfd will be changed once EOF is
5165 sent to the process. */
5166 if (NILP (p
->encode_coding_system
)
5167 && proc_encode_coding_system
[p
->outfd
])
5169 pset_encode_coding_system
5170 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5171 setup_coding_system (p
->encode_coding_system
,
5172 proc_encode_coding_system
[p
->outfd
]);
5176 if (coding
->carryover_bytes
> 0)
5178 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5179 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5180 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5181 coding
->carryover_bytes
);
5182 p
->decoding_carryover
= coding
->carryover_bytes
;
5184 if (SBYTES (text
) > 0)
5185 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5186 sometimes it's simply wrong to wrap (e.g. when called from
5187 accept-process-output). */
5188 internal_condition_case_1 (read_process_output_call
,
5190 Fcons (proc
, Fcons (text
, Qnil
))),
5191 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5192 read_process_output_error_handler
);
5194 /* If we saved the match data nonrecursively, restore it now. */
5195 restore_search_regs ();
5196 running_asynch_code
= outer_running_asynch_code
;
5198 /* Restore waiting_for_user_input_p as it was
5199 when we were called, in case the filter clobbered it. */
5200 waiting_for_user_input_p
= waiting
;
5202 #if 0 /* Call record_asynch_buffer_change unconditionally,
5203 because we might have changed minor modes or other things
5204 that affect key bindings. */
5205 if (! EQ (Fcurrent_buffer (), obuffer
)
5206 || ! EQ (current_buffer
->keymap
, okeymap
))
5208 /* But do it only if the caller is actually going to read events.
5209 Otherwise there's no need to make him wake up, and it could
5210 cause trouble (for example it would make sit_for return). */
5211 if (waiting_for_user_input_p
== -1)
5212 record_asynch_buffer_change ();
5215 /* If no filter, write into buffer if it isn't dead. */
5216 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5218 Lisp_Object old_read_only
;
5219 ptrdiff_t old_begv
, old_zv
;
5220 ptrdiff_t old_begv_byte
, old_zv_byte
;
5221 ptrdiff_t before
, before_byte
;
5222 ptrdiff_t opoint_byte
;
5226 Fset_buffer (p
->buffer
);
5228 opoint_byte
= PT_BYTE
;
5229 old_read_only
= BVAR (current_buffer
, read_only
);
5232 old_begv_byte
= BEGV_BYTE
;
5233 old_zv_byte
= ZV_BYTE
;
5235 bset_read_only (current_buffer
, Qnil
);
5237 /* Insert new output into buffer
5238 at the current end-of-output marker,
5239 thus preserving logical ordering of input and output. */
5240 if (XMARKER (p
->mark
)->buffer
)
5241 SET_PT_BOTH (clip_to_bounds (BEGV
,
5242 marker_position (p
->mark
), ZV
),
5243 clip_to_bounds (BEGV_BYTE
,
5244 marker_byte_position (p
->mark
),
5247 SET_PT_BOTH (ZV
, ZV_BYTE
);
5249 before_byte
= PT_BYTE
;
5251 /* If the output marker is outside of the visible region, save
5252 the restriction and widen. */
5253 if (! (BEGV
<= PT
&& PT
<= ZV
))
5256 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5257 text
= coding
->dst_object
;
5258 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5259 /* A new coding system might be found. See the comment in the
5260 similar code in the previous `if' block. */
5261 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5263 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5264 if (NILP (p
->encode_coding_system
)
5265 && proc_encode_coding_system
[p
->outfd
])
5267 pset_encode_coding_system
5268 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5269 setup_coding_system (p
->encode_coding_system
,
5270 proc_encode_coding_system
[p
->outfd
]);
5273 if (coding
->carryover_bytes
> 0)
5275 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5276 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5277 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5278 coding
->carryover_bytes
);
5279 p
->decoding_carryover
= coding
->carryover_bytes
;
5281 /* Adjust the multibyteness of TEXT to that of the buffer. */
5282 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5283 != ! STRING_MULTIBYTE (text
))
5284 text
= (STRING_MULTIBYTE (text
)
5285 ? Fstring_as_unibyte (text
)
5286 : Fstring_to_multibyte (text
));
5287 /* Insert before markers in case we are inserting where
5288 the buffer's mark is, and the user's next command is Meta-y. */
5289 insert_from_string_before_markers (text
, 0, 0,
5290 SCHARS (text
), SBYTES (text
), 0);
5292 /* Make sure the process marker's position is valid when the
5293 process buffer is changed in the signal_after_change above.
5294 W3 is known to do that. */
5295 if (BUFFERP (p
->buffer
)
5296 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5297 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5299 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5301 update_mode_lines
++;
5303 /* Make sure opoint and the old restrictions
5304 float ahead of any new text just as point would. */
5305 if (opoint
>= before
)
5307 opoint
+= PT
- before
;
5308 opoint_byte
+= PT_BYTE
- before_byte
;
5310 if (old_begv
> before
)
5312 old_begv
+= PT
- before
;
5313 old_begv_byte
+= PT_BYTE
- before_byte
;
5315 if (old_zv
>= before
)
5317 old_zv
+= PT
- before
;
5318 old_zv_byte
+= PT_BYTE
- before_byte
;
5321 /* If the restriction isn't what it should be, set it. */
5322 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5323 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5326 bset_read_only (current_buffer
, old_read_only
);
5327 SET_PT_BOTH (opoint
, opoint_byte
);
5329 /* Handling the process output should not deactivate the mark. */
5330 Vdeactivate_mark
= odeactivate
;
5332 unbind_to (count
, Qnil
);
5336 /* Sending data to subprocess */
5338 /* In send_process, when a write fails temporarily,
5339 wait_reading_process_output is called. It may execute user code,
5340 e.g. timers, that attempts to write new data to the same process.
5341 We must ensure that data is sent in the right order, and not
5342 interspersed half-completed with other writes (Bug#10815). This is
5343 handled by the write_queue element of struct process. It is a list
5344 with each entry having the form
5346 (string . (offset . length))
5348 where STRING is a lisp string, OFFSET is the offset into the
5349 string's byte sequence from which we should begin to send, and
5350 LENGTH is the number of bytes left to send. */
5352 /* Create a new entry in write_queue.
5353 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5354 BUF is a pointer to the string sequence of the input_obj or a C
5355 string in case of Qt or Qnil. */
5358 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5359 const char *buf
, ptrdiff_t len
, int front
)
5362 Lisp_Object entry
, obj
;
5364 if (STRINGP (input_obj
))
5366 offset
= buf
- SSDATA (input_obj
);
5372 obj
= make_unibyte_string (buf
, len
);
5375 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5378 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5380 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5383 /* Remove the first element in the write_queue of process P, put its
5384 contents in OBJ, BUF and LEN, and return non-zero. If the
5385 write_queue is empty, return zero. */
5388 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5389 const char **buf
, ptrdiff_t *len
)
5391 Lisp_Object entry
, offset_length
;
5394 if (NILP (p
->write_queue
))
5397 entry
= XCAR (p
->write_queue
);
5398 pset_write_queue (p
, XCDR (p
->write_queue
));
5400 *obj
= XCAR (entry
);
5401 offset_length
= XCDR (entry
);
5403 *len
= XINT (XCDR (offset_length
));
5404 offset
= XINT (XCAR (offset_length
));
5405 *buf
= SSDATA (*obj
) + offset
;
5410 /* Send some data to process PROC.
5411 BUF is the beginning of the data; LEN is the number of characters.
5412 OBJECT is the Lisp object that the data comes from. If OBJECT is
5413 nil or t, it means that the data comes from C string.
5415 If OBJECT is not nil, the data is encoded by PROC's coding-system
5416 for encoding before it is sent.
5418 This function can evaluate Lisp code and can garbage collect. */
5421 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5424 struct Lisp_Process
*p
= XPROCESS (proc
);
5426 struct coding_system
*coding
;
5428 if (p
->raw_status_new
)
5430 if (! EQ (p
->status
, Qrun
))
5431 error ("Process %s not running", SDATA (p
->name
));
5433 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5435 coding
= proc_encode_coding_system
[p
->outfd
];
5436 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5438 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5439 || (BUFFERP (object
)
5440 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5443 pset_encode_coding_system
5444 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5445 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5447 /* The coding system for encoding was changed to raw-text
5448 because we sent a unibyte text previously. Now we are
5449 sending a multibyte text, thus we must encode it by the
5450 original coding system specified for the current process.
5452 Another reason we come here is that the coding system
5453 was just complemented and a new one was returned by
5454 complement_process_encoding_system. */
5455 setup_coding_system (p
->encode_coding_system
, coding
);
5456 Vlast_coding_system_used
= p
->encode_coding_system
;
5458 coding
->src_multibyte
= 1;
5462 coding
->src_multibyte
= 0;
5463 /* For sending a unibyte text, character code conversion should
5464 not take place but EOL conversion should. So, setup raw-text
5465 or one of the subsidiary if we have not yet done it. */
5466 if (CODING_REQUIRE_ENCODING (coding
))
5468 if (CODING_REQUIRE_FLUSHING (coding
))
5470 /* But, before changing the coding, we must flush out data. */
5471 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5472 send_process (proc
, "", 0, Qt
);
5473 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5475 setup_coding_system (raw_text_coding_system
5476 (Vlast_coding_system_used
),
5478 coding
->src_multibyte
= 0;
5481 coding
->dst_multibyte
= 0;
5483 if (CODING_REQUIRE_ENCODING (coding
))
5485 coding
->dst_object
= Qt
;
5486 if (BUFFERP (object
))
5488 ptrdiff_t from_byte
, from
, to
;
5489 ptrdiff_t save_pt
, save_pt_byte
;
5490 struct buffer
*cur
= current_buffer
;
5492 set_buffer_internal (XBUFFER (object
));
5493 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5495 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5496 from
= BYTE_TO_CHAR (from_byte
);
5497 to
= BYTE_TO_CHAR (from_byte
+ len
);
5498 TEMP_SET_PT_BOTH (from
, from_byte
);
5499 encode_coding_object (coding
, object
, from
, from_byte
,
5500 to
, from_byte
+ len
, Qt
);
5501 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5502 set_buffer_internal (cur
);
5504 else if (STRINGP (object
))
5506 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5507 SBYTES (object
), Qt
);
5511 coding
->dst_object
= make_unibyte_string (buf
, len
);
5512 coding
->produced
= len
;
5515 len
= coding
->produced
;
5516 object
= coding
->dst_object
;
5517 buf
= SSDATA (object
);
5520 /* If there is already data in the write_queue, put the new data
5521 in the back of queue. Otherwise, ignore it. */
5522 if (!NILP (p
->write_queue
))
5523 write_queue_push (p
, object
, buf
, len
, 0);
5525 do /* while !NILP (p->write_queue) */
5527 ptrdiff_t cur_len
= -1;
5528 const char *cur_buf
;
5529 Lisp_Object cur_object
;
5531 /* If write_queue is empty, ignore it. */
5532 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5536 cur_object
= object
;
5541 /* Send this batch, using one or more write calls. */
5542 ptrdiff_t written
= 0;
5543 int outfd
= p
->outfd
;
5544 #ifdef DATAGRAM_SOCKETS
5545 if (DATAGRAM_CHAN_P (outfd
))
5547 rv
= sendto (outfd
, cur_buf
, cur_len
,
5548 0, datagram_address
[outfd
].sa
,
5549 datagram_address
[outfd
].len
);
5552 else if (errno
== EMSGSIZE
)
5553 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5560 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5563 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5564 rv
= (written
? 0 : -1);
5565 #ifdef ADAPTIVE_READ_BUFFERING
5566 if (p
->read_output_delay
> 0
5567 && p
->adaptive_read_buffering
== 1)
5569 p
->read_output_delay
= 0;
5570 process_output_delay_count
--;
5571 p
->read_output_skip
= 0;
5580 || errno
== EWOULDBLOCK
5586 /* Buffer is full. Wait, accepting input;
5587 that may allow the program
5588 to finish doing output and read more. */
5590 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5591 /* A gross hack to work around a bug in FreeBSD.
5592 In the following sequence, read(2) returns
5596 write(2) 954 bytes, get EAGAIN
5597 read(2) 1024 bytes in process_read_output
5598 read(2) 11 bytes in process_read_output
5600 That is, read(2) returns more bytes than have
5601 ever been written successfully. The 1033 bytes
5602 read are the 1022 bytes written successfully
5603 after processing (for example with CRs added if
5604 the terminal is set up that way which it is
5605 here). The same bytes will be seen again in a
5606 later read(2), without the CRs. */
5608 if (errno
== EAGAIN
)
5611 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5613 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5615 /* Put what we should have written in wait_queue. */
5616 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5617 wait_reading_process_output (0, 20 * 1000 * 1000,
5618 0, 0, Qnil
, NULL
, 0);
5619 /* Reread queue, to see what is left. */
5622 else if (errno
== EPIPE
)
5624 p
->raw_status_new
= 0;
5625 pset_status (p
, list2 (Qexit
, make_number (256)));
5626 p
->tick
= ++process_tick
;
5627 deactivate_process (proc
);
5628 error ("process %s no longer connected to pipe; closed it",
5632 /* This is a real error. */
5633 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5639 while (!NILP (p
->write_queue
));
5642 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5644 doc
: /* Send current contents of region as input to PROCESS.
5645 PROCESS may be a process, a buffer, the name of a process or buffer, or
5646 nil, indicating the current buffer's process.
5647 Called from program, takes three arguments, PROCESS, START and END.
5648 If the region is more than 500 characters long,
5649 it is sent in several bunches. This may happen even for shorter regions.
5650 Output from processes can arrive in between bunches. */)
5651 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5654 ptrdiff_t start1
, end1
;
5656 proc
= get_process (process
);
5657 validate_region (&start
, &end
);
5659 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5660 move_gap (XINT (start
));
5662 start1
= CHAR_TO_BYTE (XINT (start
));
5663 end1
= CHAR_TO_BYTE (XINT (end
));
5664 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5665 Fcurrent_buffer ());
5670 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5672 doc
: /* Send PROCESS the contents of STRING as input.
5673 PROCESS may be a process, a buffer, the name of a process or buffer, or
5674 nil, indicating the current buffer's process.
5675 If STRING is more than 500 characters long,
5676 it is sent in several bunches. This may happen even for shorter strings.
5677 Output from processes can arrive in between bunches. */)
5678 (Lisp_Object process
, Lisp_Object string
)
5681 CHECK_STRING (string
);
5682 proc
= get_process (process
);
5683 send_process (proc
, SSDATA (string
),
5684 SBYTES (string
), string
);
5688 /* Return the foreground process group for the tty/pty that
5689 the process P uses. */
5691 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5696 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5699 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5700 master side. Try the slave side. */
5701 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5705 ioctl (fd
, TIOCGPGRP
, &gid
);
5709 #endif /* defined (TIOCGPGRP ) */
5714 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5715 Sprocess_running_child_p
, 0, 1, 0,
5716 doc
: /* Return t if PROCESS has given the terminal to a child.
5717 If the operating system does not make it possible to find out,
5718 return t unconditionally. */)
5719 (Lisp_Object process
)
5721 /* Initialize in case ioctl doesn't exist or gives an error,
5722 in a way that will cause returning t. */
5725 struct Lisp_Process
*p
;
5727 proc
= get_process (process
);
5728 p
= XPROCESS (proc
);
5730 if (!EQ (p
->type
, Qreal
))
5731 error ("Process %s is not a subprocess",
5734 error ("Process %s is not active",
5737 gid
= emacs_get_tty_pgrp (p
);
5744 /* send a signal number SIGNO to PROCESS.
5745 If CURRENT_GROUP is t, that means send to the process group
5746 that currently owns the terminal being used to communicate with PROCESS.
5747 This is used for various commands in shell mode.
5748 If CURRENT_GROUP is lambda, that means send to the process group
5749 that currently owns the terminal, but only if it is NOT the shell itself.
5751 If NOMSG is zero, insert signal-announcements into process's buffers
5754 If we can, we try to signal PROCESS by sending control characters
5755 down the pty. This allows us to signal inferiors who have changed
5756 their uid, for which killpg would return an EPERM error. */
5759 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5763 register struct Lisp_Process
*p
;
5767 proc
= get_process (process
);
5768 p
= XPROCESS (proc
);
5770 if (!EQ (p
->type
, Qreal
))
5771 error ("Process %s is not a subprocess",
5774 error ("Process %s is not active",
5778 current_group
= Qnil
;
5780 /* If we are using pgrps, get a pgrp number and make it negative. */
5781 if (NILP (current_group
))
5782 /* Send the signal to the shell's process group. */
5786 #ifdef SIGNALS_VIA_CHARACTERS
5787 /* If possible, send signals to the entire pgrp
5788 by sending an input character to it. */
5791 cc_t
*sig_char
= NULL
;
5793 tcgetattr (p
->infd
, &t
);
5798 sig_char
= &t
.c_cc
[VINTR
];
5802 sig_char
= &t
.c_cc
[VQUIT
];
5806 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5807 sig_char
= &t
.c_cc
[VSWTCH
];
5809 sig_char
= &t
.c_cc
[VSUSP
];
5814 if (sig_char
&& *sig_char
!= CDISABLE
)
5816 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5819 /* If we can't send the signal with a character,
5820 fall through and send it another way. */
5822 /* The code above may fall through if it can't
5823 handle the signal. */
5824 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5827 /* Get the current pgrp using the tty itself, if we have that.
5828 Otherwise, use the pty to get the pgrp.
5829 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5830 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5831 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5832 His patch indicates that if TIOCGPGRP returns an error, then
5833 we should just assume that p->pid is also the process group id. */
5835 gid
= emacs_get_tty_pgrp (p
);
5838 /* If we can't get the information, assume
5839 the shell owns the tty. */
5842 /* It is not clear whether anything really can set GID to -1.
5843 Perhaps on some system one of those ioctls can or could do so.
5844 Or perhaps this is vestigial. */
5847 #else /* ! defined (TIOCGPGRP ) */
5848 /* Can't select pgrps on this system, so we know that
5849 the child itself heads the pgrp. */
5851 #endif /* ! defined (TIOCGPGRP ) */
5853 /* If current_group is lambda, and the shell owns the terminal,
5854 don't send any signal. */
5855 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5863 p
->raw_status_new
= 0;
5864 pset_status (p
, Qrun
);
5865 p
->tick
= ++process_tick
;
5868 status_notify (NULL
);
5869 redisplay_preserve_echo_area (13);
5872 #endif /* ! defined (SIGCONT) */
5876 flush_pending_output (p
->infd
);
5880 /* If we don't have process groups, send the signal to the immediate
5881 subprocess. That isn't really right, but it's better than any
5882 obvious alternative. */
5885 kill (p
->pid
, signo
);
5889 /* gid may be a pid, or minus a pgrp's number */
5891 if (!NILP (current_group
))
5893 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5894 EMACS_KILLPG (gid
, signo
);
5901 #else /* ! defined (TIOCSIGSEND) */
5902 EMACS_KILLPG (gid
, signo
);
5903 #endif /* ! defined (TIOCSIGSEND) */
5906 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5907 doc
: /* Interrupt process PROCESS.
5908 PROCESS may be a process, a buffer, or the name of a process or buffer.
5909 No arg or nil means current buffer's process.
5910 Second arg CURRENT-GROUP non-nil means send signal to
5911 the current process-group of the process's controlling terminal
5912 rather than to the process's own process group.
5913 If the process is a shell, this means interrupt current subjob
5914 rather than the shell.
5916 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5917 don't send the signal. */)
5918 (Lisp_Object process
, Lisp_Object current_group
)
5920 process_send_signal (process
, SIGINT
, current_group
, 0);
5924 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5925 doc
: /* Kill process PROCESS. May be process or name of one.
5926 See function `interrupt-process' for more details on usage. */)
5927 (Lisp_Object process
, Lisp_Object current_group
)
5929 process_send_signal (process
, SIGKILL
, current_group
, 0);
5933 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5934 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5935 See function `interrupt-process' for more details on usage. */)
5936 (Lisp_Object process
, Lisp_Object current_group
)
5938 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5942 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5943 doc
: /* Stop process PROCESS. May be process or name of one.
5944 See function `interrupt-process' for more details on usage.
5945 If PROCESS is a network or serial process, inhibit handling of incoming
5947 (Lisp_Object process
, Lisp_Object current_group
)
5949 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5951 struct Lisp_Process
*p
;
5953 p
= XPROCESS (process
);
5954 if (NILP (p
->command
)
5957 FD_CLR (p
->infd
, &input_wait_mask
);
5958 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5960 pset_command (p
, Qt
);
5964 error ("No SIGTSTP support");
5966 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5971 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5972 doc
: /* Continue process PROCESS. May be process or name of one.
5973 See function `interrupt-process' for more details on usage.
5974 If PROCESS is a network or serial process, resume handling of incoming
5976 (Lisp_Object process
, Lisp_Object current_group
)
5978 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5980 struct Lisp_Process
*p
;
5982 p
= XPROCESS (process
);
5983 if (EQ (p
->command
, Qt
)
5985 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5987 FD_SET (p
->infd
, &input_wait_mask
);
5988 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5990 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5991 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5992 #else /* not WINDOWSNT */
5993 tcflush (p
->infd
, TCIFLUSH
);
5994 #endif /* not WINDOWSNT */
5996 pset_command (p
, Qnil
);
6000 process_send_signal (process
, SIGCONT
, current_group
, 0);
6002 error ("No SIGCONT support");
6007 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6008 2, 2, "sProcess (name or number): \nnSignal code: ",
6009 doc
: /* Send PROCESS the signal with code SIGCODE.
6010 PROCESS may also be a number specifying the process id of the
6011 process to signal; in this case, the process need not be a child of
6013 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6014 (Lisp_Object process
, Lisp_Object sigcode
)
6018 if (STRINGP (process
))
6020 Lisp_Object tem
= Fget_process (process
);
6023 Lisp_Object process_number
=
6024 string_to_number (SSDATA (process
), 10, 1);
6025 if (INTEGERP (process_number
) || FLOATP (process_number
))
6026 tem
= process_number
;
6030 else if (!NUMBERP (process
))
6031 process
= get_process (process
);
6036 if (NUMBERP (process
))
6037 CONS_TO_INTEGER (process
, pid_t
, pid
);
6040 CHECK_PROCESS (process
);
6041 pid
= XPROCESS (process
)->pid
;
6043 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6046 #define parse_signal(NAME, VALUE) \
6047 else if (!xstrcasecmp (name, NAME)) \
6048 XSETINT (sigcode, VALUE)
6050 if (INTEGERP (sigcode
))
6051 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6056 CHECK_SYMBOL (sigcode
);
6057 name
= SSDATA (SYMBOL_NAME (sigcode
));
6059 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6065 parse_signal ("usr1", SIGUSR1
);
6068 parse_signal ("usr2", SIGUSR2
);
6070 parse_signal ("term", SIGTERM
);
6072 parse_signal ("hup", SIGHUP
);
6074 parse_signal ("int", SIGINT
);
6076 parse_signal ("quit", SIGQUIT
);
6078 parse_signal ("ill", SIGILL
);
6079 parse_signal ("abrt", SIGABRT
);
6081 parse_signal ("emt", SIGEMT
);
6084 parse_signal ("kill", SIGKILL
);
6086 parse_signal ("fpe", SIGFPE
);
6088 parse_signal ("bus", SIGBUS
);
6090 parse_signal ("segv", SIGSEGV
);
6092 parse_signal ("sys", SIGSYS
);
6095 parse_signal ("pipe", SIGPIPE
);
6098 parse_signal ("alrm", SIGALRM
);
6101 parse_signal ("urg", SIGURG
);
6104 parse_signal ("stop", SIGSTOP
);
6107 parse_signal ("tstp", SIGTSTP
);
6110 parse_signal ("cont", SIGCONT
);
6113 parse_signal ("chld", SIGCHLD
);
6116 parse_signal ("ttin", SIGTTIN
);
6119 parse_signal ("ttou", SIGTTOU
);
6122 parse_signal ("io", SIGIO
);
6125 parse_signal ("xcpu", SIGXCPU
);
6128 parse_signal ("xfsz", SIGXFSZ
);
6131 parse_signal ("vtalrm", SIGVTALRM
);
6134 parse_signal ("prof", SIGPROF
);
6137 parse_signal ("winch", SIGWINCH
);
6140 parse_signal ("info", SIGINFO
);
6143 error ("Undefined signal name %s", name
);
6148 return make_number (kill (pid
, XINT (sigcode
)));
6151 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6152 doc
: /* Make PROCESS see end-of-file in its input.
6153 EOF comes after any text already sent to it.
6154 PROCESS may be a process, a buffer, the name of a process or buffer, or
6155 nil, indicating the current buffer's process.
6156 If PROCESS is a network connection, or is a process communicating
6157 through a pipe (as opposed to a pty), then you cannot send any more
6158 text to PROCESS after you call this function.
6159 If PROCESS is a serial process, wait until all output written to the
6160 process has been transmitted to the serial port. */)
6161 (Lisp_Object process
)
6164 struct coding_system
*coding
;
6166 if (DATAGRAM_CONN_P (process
))
6169 proc
= get_process (process
);
6170 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6172 /* Make sure the process is really alive. */
6173 if (XPROCESS (proc
)->raw_status_new
)
6174 update_status (XPROCESS (proc
));
6175 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6176 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6178 if (CODING_REQUIRE_FLUSHING (coding
))
6180 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6181 send_process (proc
, "", 0, Qnil
);
6184 if (XPROCESS (proc
)->pty_flag
)
6185 send_process (proc
, "\004", 1, Qnil
);
6186 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6189 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6190 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6191 #endif /* not WINDOWSNT */
6192 /* Do nothing on Windows because writes are blocking. */
6196 int old_outfd
, new_outfd
;
6198 #ifdef HAVE_SHUTDOWN
6199 /* If this is a network connection, or socketpair is used
6200 for communication with the subprocess, call shutdown to cause EOF.
6201 (In some old system, shutdown to socketpair doesn't work.
6202 Then we just can't win.) */
6203 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6204 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6205 shutdown (XPROCESS (proc
)->outfd
, 1);
6206 /* In case of socketpair, outfd == infd, so don't close it. */
6207 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6208 emacs_close (XPROCESS (proc
)->outfd
);
6209 #else /* not HAVE_SHUTDOWN */
6210 emacs_close (XPROCESS (proc
)->outfd
);
6211 #endif /* not HAVE_SHUTDOWN */
6212 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6215 old_outfd
= XPROCESS (proc
)->outfd
;
6217 if (!proc_encode_coding_system
[new_outfd
])
6218 proc_encode_coding_system
[new_outfd
]
6219 = xmalloc (sizeof (struct coding_system
));
6220 *proc_encode_coding_system
[new_outfd
]
6221 = *proc_encode_coding_system
[old_outfd
];
6222 memset (proc_encode_coding_system
[old_outfd
], 0,
6223 sizeof (struct coding_system
));
6225 XPROCESS (proc
)->outfd
= new_outfd
;
6230 /* If the status of the process DESIRED has changed, return true and
6231 set *STATUS to its exit status; otherwise, return false.
6232 If HAVE is nonnegative, assume that HAVE = waitpid (HAVE, STATUS, ...)
6233 has already been invoked, and do not invoke waitpid again. */
6236 process_status_retrieved (pid_t desired
, pid_t have
, int *status
)
6240 /* Invoke waitpid only with a known process ID; do not invoke
6241 waitpid with a nonpositive argument. Otherwise, Emacs might
6242 reap an unwanted process by mistake. For example, invoking
6243 waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
6244 so that another thread running glib won't find them. */
6246 have
= waitpid (desired
, status
, WNOHANG
| WUNTRACED
);
6247 while (have
< 0 && errno
== EINTR
);
6250 return have
== desired
;
6253 /* If PID is nonnegative, the child process PID with wait status W has
6254 changed its status; record this and return true.
6256 If PID is negative, ignore W, and look for known child processes
6257 of Emacs whose status have changed. For each one found, record its new
6260 All we do is change the status; we do not run sentinels or print
6261 notifications. That is saved for the next time keyboard input is
6262 done, in order to avoid timing errors.
6264 ** WARNING: this can be called during garbage collection.
6265 Therefore, it must not be fooled by the presence of mark bits in
6268 ** USG WARNING: Although it is not obvious from the documentation
6269 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6270 signal() before executing at least one wait(), otherwise the
6271 handler will be called again, resulting in an infinite loop. The
6272 relevant portion of the documentation reads "SIGCLD signals will be
6273 queued and the signal-catching function will be continually
6274 reentered until the queue is empty". Invoking signal() causes the
6275 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6278 ** Malloc WARNING: This should never call malloc either directly or
6279 indirectly; if it does, that is a bug */
6282 record_child_status_change (pid_t pid
, int w
)
6286 /* Record at most one child only if we already know one child that
6288 bool record_at_most_one_child
= 0 <= pid
;
6292 /* Find the process that signaled us, and record its status. */
6294 /* The process can have been deleted by Fdelete_process. */
6295 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6297 bool all_pids_are_fixnums
6298 = (MOST_NEGATIVE_FIXNUM
<= TYPE_MINIMUM (pid_t
)
6299 && TYPE_MAXIMUM (pid_t
) <= MOST_POSITIVE_FIXNUM
);
6300 Lisp_Object xpid
= XCAR (tail
);
6301 if (all_pids_are_fixnums
? INTEGERP (xpid
) : NUMBERP (xpid
))
6304 if (INTEGERP (xpid
))
6305 deleted_pid
= XINT (xpid
);
6307 deleted_pid
= XFLOAT_DATA (xpid
);
6308 if (process_status_retrieved (deleted_pid
, pid
, &w
))
6310 XSETCAR (tail
, Qnil
);
6311 if (record_at_most_one_child
)
6317 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6318 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6320 Lisp_Object proc
= XCDR (XCAR (tail
));
6321 struct Lisp_Process
*p
= XPROCESS (proc
);
6322 if (p
->alive
&& process_status_retrieved (p
->pid
, pid
, &w
))
6324 /* Change the status of the process that was found. */
6325 p
->tick
= ++process_tick
;
6327 p
->raw_status_new
= 1;
6329 /* If process has terminated, stop waiting for its output. */
6330 if (WIFSIGNALED (w
) || WIFEXITED (w
))
6332 int clear_desc_flag
= 0;
6335 clear_desc_flag
= 1;
6337 /* clear_desc_flag avoids a compiler bug in Microsoft C. */
6338 if (clear_desc_flag
)
6340 FD_CLR (p
->infd
, &input_wait_mask
);
6341 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6345 /* Tell wait_reading_process_output that it needs to wake up and
6347 if (input_available_clear_time
)
6348 *input_available_clear_time
= make_emacs_time (0, 0);
6350 if (record_at_most_one_child
)
6357 /* The caller successfully waited for a pid but no asynchronous
6358 process was found for it, so this is a synchronous process. */
6360 synch_process_alive
= 0;
6362 /* Report the status of the synchronous process. */
6364 synch_process_retcode
= WEXITSTATUS (w
);
6365 else if (WIFSIGNALED (w
))
6366 synch_process_termsig
= WTERMSIG (w
);
6368 /* Tell wait_reading_process_output that it needs to wake up and
6370 if (input_available_clear_time
)
6371 *input_available_clear_time
= make_emacs_time (0, 0);
6379 handle_child_signal (int sig
)
6381 record_child_status_change (-1, 0);
6385 deliver_child_signal (int sig
)
6387 deliver_process_signal (sig
, handle_child_signal
);
6390 #endif /* SIGCHLD */
6394 exec_sentinel_unwind (Lisp_Object data
)
6396 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6401 exec_sentinel_error_handler (Lisp_Object error_val
)
6403 cmd_error_internal (error_val
, "error in process sentinel: ");
6405 update_echo_area ();
6406 Fsleep_for (make_number (2), Qnil
);
6411 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6413 Lisp_Object sentinel
, odeactivate
;
6414 struct Lisp_Process
*p
= XPROCESS (proc
);
6415 ptrdiff_t count
= SPECPDL_INDEX ();
6416 bool outer_running_asynch_code
= running_asynch_code
;
6417 int waiting
= waiting_for_user_input_p
;
6419 if (inhibit_sentinels
)
6422 /* No need to gcpro these, because all we do with them later
6423 is test them for EQness, and none of them should be a string. */
6424 odeactivate
= Vdeactivate_mark
;
6426 Lisp_Object obuffer
, okeymap
;
6427 XSETBUFFER (obuffer
, current_buffer
);
6428 okeymap
= BVAR (current_buffer
, keymap
);
6431 /* There's no good reason to let sentinels change the current
6432 buffer, and many callers of accept-process-output, sit-for, and
6433 friends don't expect current-buffer to be changed from under them. */
6434 record_unwind_current_buffer ();
6436 sentinel
= p
->sentinel
;
6437 if (NILP (sentinel
))
6440 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6441 assure that it gets restored no matter how the sentinel exits. */
6442 pset_sentinel (p
, Qnil
);
6443 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6444 /* Inhibit quit so that random quits don't screw up a running filter. */
6445 specbind (Qinhibit_quit
, Qt
);
6446 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6448 /* In case we get recursively called,
6449 and we already saved the match data nonrecursively,
6450 save the same match data in safely recursive fashion. */
6451 if (outer_running_asynch_code
)
6454 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6455 restore_search_regs ();
6456 record_unwind_save_match_data ();
6457 Fset_match_data (tem
, Qt
);
6460 /* For speed, if a search happens within this code,
6461 save the match data in a special nonrecursive fashion. */
6462 running_asynch_code
= 1;
6464 internal_condition_case_1 (read_process_output_call
,
6466 Fcons (proc
, Fcons (reason
, Qnil
))),
6467 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6468 exec_sentinel_error_handler
);
6470 /* If we saved the match data nonrecursively, restore it now. */
6471 restore_search_regs ();
6472 running_asynch_code
= outer_running_asynch_code
;
6474 Vdeactivate_mark
= odeactivate
;
6476 /* Restore waiting_for_user_input_p as it was
6477 when we were called, in case the filter clobbered it. */
6478 waiting_for_user_input_p
= waiting
;
6481 if (! EQ (Fcurrent_buffer (), obuffer
)
6482 || ! EQ (current_buffer
->keymap
, okeymap
))
6484 /* But do it only if the caller is actually going to read events.
6485 Otherwise there's no need to make him wake up, and it could
6486 cause trouble (for example it would make sit_for return). */
6487 if (waiting_for_user_input_p
== -1)
6488 record_asynch_buffer_change ();
6490 unbind_to (count
, Qnil
);
6493 /* Report all recent events of a change in process status
6494 (either run the sentinel or output a message).
6495 This is usually done while Emacs is waiting for keyboard input
6496 but can be done at other times. */
6499 status_notify (struct Lisp_Process
*deleting_process
)
6501 register Lisp_Object proc
, buffer
;
6502 Lisp_Object tail
, msg
;
6503 struct gcpro gcpro1
, gcpro2
;
6507 /* We need to gcpro tail; if read_process_output calls a filter
6508 which deletes a process and removes the cons to which tail points
6509 from Vprocess_alist, and then causes a GC, tail is an unprotected
6513 /* Set this now, so that if new processes are created by sentinels
6514 that we run, we get called again to handle their status changes. */
6515 update_tick
= process_tick
;
6517 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6520 register struct Lisp_Process
*p
;
6522 proc
= Fcdr (XCAR (tail
));
6523 p
= XPROCESS (proc
);
6525 if (p
->tick
!= p
->update_tick
)
6527 p
->update_tick
= p
->tick
;
6529 /* If process is still active, read any output that remains. */
6530 while (! EQ (p
->filter
, Qt
)
6531 && ! EQ (p
->status
, Qconnect
)
6532 && ! EQ (p
->status
, Qlisten
)
6533 /* Network or serial process not stopped: */
6534 && ! EQ (p
->command
, Qt
)
6536 && p
!= deleting_process
6537 && read_process_output (proc
, p
->infd
) > 0);
6541 /* Get the text to use for the message. */
6542 if (p
->raw_status_new
)
6544 msg
= status_message (p
);
6546 /* If process is terminated, deactivate it or delete it. */
6548 if (CONSP (p
->status
))
6549 symbol
= XCAR (p
->status
);
6551 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6552 || EQ (symbol
, Qclosed
))
6554 if (delete_exited_processes
)
6555 remove_process (proc
);
6557 deactivate_process (proc
);
6560 /* The actions above may have further incremented p->tick.
6561 So set p->update_tick again
6562 so that an error in the sentinel will not cause
6563 this code to be run again. */
6564 p
->update_tick
= p
->tick
;
6565 /* Now output the message suitably. */
6566 if (!NILP (p
->sentinel
))
6567 exec_sentinel (proc
, msg
);
6568 /* Don't bother with a message in the buffer
6569 when a process becomes runnable. */
6570 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6573 struct buffer
*old
= current_buffer
;
6574 ptrdiff_t opoint
, opoint_byte
;
6575 ptrdiff_t before
, before_byte
;
6577 /* Avoid error if buffer is deleted
6578 (probably that's why the process is dead, too) */
6579 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6581 Fset_buffer (buffer
);
6584 opoint_byte
= PT_BYTE
;
6585 /* Insert new output into buffer
6586 at the current end-of-output marker,
6587 thus preserving logical ordering of input and output. */
6588 if (XMARKER (p
->mark
)->buffer
)
6589 Fgoto_char (p
->mark
);
6591 SET_PT_BOTH (ZV
, ZV_BYTE
);
6594 before_byte
= PT_BYTE
;
6596 tem
= BVAR (current_buffer
, read_only
);
6597 bset_read_only (current_buffer
, Qnil
);
6598 insert_string ("\nProcess ");
6599 { /* FIXME: temporary kludge */
6600 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6601 insert_string (" ");
6603 bset_read_only (current_buffer
, tem
);
6604 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6606 if (opoint
>= before
)
6607 SET_PT_BOTH (opoint
+ (PT
- before
),
6608 opoint_byte
+ (PT_BYTE
- before_byte
));
6610 SET_PT_BOTH (opoint
, opoint_byte
);
6612 set_buffer_internal (old
);
6617 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6622 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6623 Sset_process_coding_system
, 1, 3, 0,
6624 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6625 DECODING will be used to decode subprocess output and ENCODING to
6626 encode subprocess input. */)
6627 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6629 register struct Lisp_Process
*p
;
6631 CHECK_PROCESS (process
);
6632 p
= XPROCESS (process
);
6634 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6636 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6637 Fcheck_coding_system (decoding
);
6638 Fcheck_coding_system (encoding
);
6639 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6640 pset_decode_coding_system (p
, decoding
);
6641 pset_encode_coding_system (p
, encoding
);
6642 setup_process_coding_systems (process
);
6647 DEFUN ("process-coding-system",
6648 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6649 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6650 (register Lisp_Object process
)
6652 CHECK_PROCESS (process
);
6653 return Fcons (XPROCESS (process
)->decode_coding_system
,
6654 XPROCESS (process
)->encode_coding_system
);
6657 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6658 Sset_process_filter_multibyte
, 2, 2, 0,
6659 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6660 If FLAG is non-nil, the filter is given multibyte strings.
6661 If FLAG is nil, the filter is given unibyte strings. In this case,
6662 all character code conversion except for end-of-line conversion is
6664 (Lisp_Object process
, Lisp_Object flag
)
6666 register struct Lisp_Process
*p
;
6668 CHECK_PROCESS (process
);
6669 p
= XPROCESS (process
);
6671 pset_decode_coding_system
6672 (p
, raw_text_coding_system (p
->decode_coding_system
));
6673 setup_process_coding_systems (process
);
6678 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6679 Sprocess_filter_multibyte_p
, 1, 1, 0,
6680 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6681 (Lisp_Object process
)
6683 register struct Lisp_Process
*p
;
6684 struct coding_system
*coding
;
6686 CHECK_PROCESS (process
);
6687 p
= XPROCESS (process
);
6688 coding
= proc_decode_coding_system
[p
->infd
];
6689 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6698 add_gpm_wait_descriptor (int desc
)
6700 add_keyboard_wait_descriptor (desc
);
6704 delete_gpm_wait_descriptor (int desc
)
6706 delete_keyboard_wait_descriptor (desc
);
6711 # ifdef USABLE_SIGIO
6713 /* Return nonzero if *MASK has a bit set
6714 that corresponds to one of the keyboard input descriptors. */
6717 keyboard_bit_set (fd_set
*mask
)
6721 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6722 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6723 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6730 #else /* not subprocesses */
6732 /* Defined on msdos.c. */
6733 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6734 EMACS_TIME
*, void *);
6736 /* Implementation of wait_reading_process_output, assuming that there
6737 are no subprocesses. Used only by the MS-DOS build.
6739 Wait for timeout to elapse and/or keyboard input to be available.
6743 If negative, gobble data immediately available but don't wait for any.
6746 an additional duration to wait, measured in nanoseconds
6747 If TIME_LIMIT is zero, then:
6748 If NSECS == 0, there is no limit.
6749 If NSECS > 0, the timeout consists of NSECS only.
6750 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6753 0 to ignore keyboard input, or
6754 1 to return when input is available, or
6755 -1 means caller will actually read the input, so don't throw to
6758 see full version for other parameters. We know that wait_proc will
6759 always be NULL, since `subprocesses' isn't defined.
6761 DO_DISPLAY means redisplay should be done to show subprocess
6762 output that arrives.
6764 Return true if we received input from any process. */
6767 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6769 Lisp_Object wait_for_cell
,
6770 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6773 EMACS_TIME end_time
, timeout
;
6780 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6781 time_limit
= TYPE_MAXIMUM (time_t);
6783 /* What does time_limit really mean? */
6784 if (time_limit
|| 0 < nsecs
)
6786 timeout
= make_emacs_time (time_limit
, nsecs
);
6787 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6790 /* Turn off periodic alarms (in case they are in use)
6791 and then turn off any other atimers,
6792 because the select emulator uses alarms. */
6794 turn_on_atimers (0);
6798 int timeout_reduced_for_timers
= 0;
6799 SELECT_TYPE waitchannels
;
6802 /* If calling from keyboard input, do not quit
6803 since we want to return C-g as an input character.
6804 Otherwise, do pending quit if requested. */
6808 /* Exit now if the cell we're waiting for became non-nil. */
6809 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6812 /* Compute time from now till when time limit is up */
6813 /* Exit if already run out */
6816 /* A negative timeout means
6817 gobble output available now
6818 but don't wait at all. */
6820 timeout
= make_emacs_time (0, 0);
6822 else if (time_limit
|| 0 < nsecs
)
6824 EMACS_TIME now
= current_emacs_time ();
6825 if (EMACS_TIME_LE (end_time
, now
))
6827 timeout
= sub_emacs_time (end_time
, now
);
6831 timeout
= make_emacs_time (100000, 0);
6834 /* If our caller will not immediately handle keyboard events,
6835 run timer events directly.
6836 (Callers that will immediately read keyboard events
6837 call timer_delay on their own.) */
6838 if (NILP (wait_for_cell
))
6840 EMACS_TIME timer_delay
;
6844 unsigned old_timers_run
= timers_run
;
6845 timer_delay
= timer_check ();
6846 if (timers_run
!= old_timers_run
&& do_display
)
6847 /* We must retry, since a timer may have requeued itself
6848 and that could alter the time delay. */
6849 redisplay_preserve_echo_area (14);
6853 while (!detect_input_pending ());
6855 /* If there is unread keyboard input, also return. */
6857 && requeued_events_pending_p ())
6860 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6862 if (EMACS_TIME_LT (timer_delay
, timeout
))
6864 timeout
= timer_delay
;
6865 timeout_reduced_for_timers
= 1;
6870 /* Cause C-g and alarm signals to take immediate action,
6871 and cause input available signals to zero out timeout. */
6873 set_waiting_for_input (&timeout
);
6875 /* If a frame has been newly mapped and needs updating,
6876 reprocess its display stuff. */
6877 if (frame_garbaged
&& do_display
)
6879 clear_waiting_for_input ();
6880 redisplay_preserve_echo_area (15);
6882 set_waiting_for_input (&timeout
);
6885 /* Wait till there is something to do. */
6886 FD_ZERO (&waitchannels
);
6887 if (read_kbd
&& detect_input_pending ())
6891 if (read_kbd
|| !NILP (wait_for_cell
))
6892 FD_SET (0, &waitchannels
);
6893 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6898 /* Make C-g and alarm signals set flags again */
6899 clear_waiting_for_input ();
6901 /* If we woke up due to SIGWINCH, actually change size now. */
6902 do_pending_window_change (0);
6904 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6905 /* We waited the full specified time, so return now. */
6910 /* If the system call was interrupted, then go around the
6912 if (xerrno
== EINTR
)
6913 FD_ZERO (&waitchannels
);
6915 error ("select error: %s", emacs_strerror (xerrno
));
6918 /* Check for keyboard input */
6921 && detect_input_pending_run_timers (do_display
))
6923 swallow_events (do_display
);
6924 if (detect_input_pending_run_timers (do_display
))
6928 /* If there is unread keyboard input, also return. */
6930 && requeued_events_pending_p ())
6933 /* If wait_for_cell. check for keyboard input
6934 but don't run any timers.
6935 ??? (It seems wrong to me to check for keyboard
6936 input at all when wait_for_cell, but the code
6937 has been this way since July 1994.
6938 Try changing this after version 19.31.) */
6939 if (! NILP (wait_for_cell
)
6940 && detect_input_pending ())
6942 swallow_events (do_display
);
6943 if (detect_input_pending ())
6947 /* Exit now if the cell we're waiting for became non-nil. */
6948 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6957 #endif /* not subprocesses */
6959 /* The following functions are needed even if async subprocesses are
6960 not supported. Some of them are no-op stubs in that case. */
6962 /* Add DESC to the set of keyboard input descriptors. */
6965 add_keyboard_wait_descriptor (int desc
)
6967 #ifdef subprocesses /* actually means "not MSDOS" */
6968 FD_SET (desc
, &input_wait_mask
);
6969 FD_SET (desc
, &non_process_wait_mask
);
6970 if (desc
> max_input_desc
)
6971 max_input_desc
= desc
;
6975 /* From now on, do not expect DESC to give keyboard input. */
6978 delete_keyboard_wait_descriptor (int desc
)
6982 int lim
= max_input_desc
;
6984 FD_CLR (desc
, &input_wait_mask
);
6985 FD_CLR (desc
, &non_process_wait_mask
);
6987 if (desc
== max_input_desc
)
6988 for (fd
= 0; fd
< lim
; fd
++)
6989 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
6990 max_input_desc
= fd
;
6994 /* Setup coding systems of PROCESS. */
6997 setup_process_coding_systems (Lisp_Object process
)
7000 struct Lisp_Process
*p
= XPROCESS (process
);
7002 int outch
= p
->outfd
;
7003 Lisp_Object coding_system
;
7005 if (inch
< 0 || outch
< 0)
7008 if (!proc_decode_coding_system
[inch
])
7009 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7010 coding_system
= p
->decode_coding_system
;
7011 if (! NILP (p
->filter
))
7013 else if (BUFFERP (p
->buffer
))
7015 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7016 coding_system
= raw_text_coding_system (coding_system
);
7018 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7020 if (!proc_encode_coding_system
[outch
])
7021 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7022 setup_coding_system (p
->encode_coding_system
,
7023 proc_encode_coding_system
[outch
]);
7027 /* Close all descriptors currently in use for communication
7028 with subprocess. This is used in a newly-forked subprocess
7029 to get rid of irrelevant descriptors. */
7032 close_process_descs (void)
7036 for (i
= 0; i
< MAXDESC
; i
++)
7038 Lisp_Object process
;
7039 process
= chan_process
[i
];
7040 if (!NILP (process
))
7042 int in
= XPROCESS (process
)->infd
;
7043 int out
= XPROCESS (process
)->outfd
;
7046 if (out
>= 0 && in
!= out
)
7053 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7054 doc
: /* Return the (or a) process associated with BUFFER.
7055 BUFFER may be a buffer or the name of one. */)
7056 (register Lisp_Object buffer
)
7059 register Lisp_Object buf
, tail
, proc
;
7061 if (NILP (buffer
)) return Qnil
;
7062 buf
= Fget_buffer (buffer
);
7063 if (NILP (buf
)) return Qnil
;
7065 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7067 proc
= Fcdr (XCAR (tail
));
7068 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7071 #endif /* subprocesses */
7075 DEFUN ("process-inherit-coding-system-flag",
7076 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7078 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7079 If this flag is t, `buffer-file-coding-system' of the buffer
7080 associated with PROCESS will inherit the coding system used to decode
7081 the process output. */)
7082 (register Lisp_Object process
)
7085 CHECK_PROCESS (process
);
7086 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7088 /* Ignore the argument and return the value of
7089 inherit-process-coding-system. */
7090 return inherit_process_coding_system
? Qt
: Qnil
;
7094 /* Kill all processes associated with `buffer'.
7095 If `buffer' is nil, kill all processes */
7098 kill_buffer_processes (Lisp_Object buffer
)
7101 Lisp_Object tail
, proc
;
7103 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7105 proc
= XCDR (XCAR (tail
));
7107 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7109 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7110 Fdelete_process (proc
);
7111 else if (XPROCESS (proc
)->infd
>= 0)
7112 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7115 #else /* subprocesses */
7116 /* Since we have no subprocesses, this does nothing. */
7117 #endif /* subprocesses */
7120 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7121 Swaiting_for_user_input_p
, 0, 0, 0,
7122 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7123 This is intended for use by asynchronous process output filters and sentinels. */)
7127 return (waiting_for_user_input_p
? Qt
: Qnil
);
7133 /* Stop reading input from keyboard sources. */
7136 hold_keyboard_input (void)
7141 /* Resume reading input from keyboard sources. */
7144 unhold_keyboard_input (void)
7149 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7152 kbd_on_hold_p (void)
7154 return kbd_is_on_hold
;
7158 /* Enumeration of and access to system processes a-la ps(1). */
7160 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7162 doc
: /* Return a list of numerical process IDs of all running processes.
7163 If this functionality is unsupported, return nil.
7165 See `process-attributes' for getting attributes of a process given its ID. */)
7168 return list_system_processes ();
7171 DEFUN ("process-attributes", Fprocess_attributes
,
7172 Sprocess_attributes
, 1, 1, 0,
7173 doc
: /* Return attributes of the process given by its PID, a number.
7175 Value is an alist where each element is a cons cell of the form
7179 If this functionality is unsupported, the value is nil.
7181 See `list-system-processes' for getting a list of all process IDs.
7183 The KEYs of the attributes that this function may return are listed
7184 below, together with the type of the associated VALUE (in parentheses).
7185 Not all platforms support all of these attributes; unsupported
7186 attributes will not appear in the returned alist.
7187 Unless explicitly indicated otherwise, numbers can have either
7188 integer or floating point values.
7190 euid -- Effective user User ID of the process (number)
7191 user -- User name corresponding to euid (string)
7192 egid -- Effective user Group ID of the process (number)
7193 group -- Group name corresponding to egid (string)
7194 comm -- Command name (executable name only) (string)
7195 state -- Process state code, such as "S", "R", or "T" (string)
7196 ppid -- Parent process ID (number)
7197 pgrp -- Process group ID (number)
7198 sess -- Session ID, i.e. process ID of session leader (number)
7199 ttname -- Controlling tty name (string)
7200 tpgid -- ID of foreground process group on the process's tty (number)
7201 minflt -- number of minor page faults (number)
7202 majflt -- number of major page faults (number)
7203 cminflt -- cumulative number of minor page faults (number)
7204 cmajflt -- cumulative number of major page faults (number)
7205 utime -- user time used by the process, in (current-time) format,
7206 which is a list of integers (HIGH LOW USEC PSEC)
7207 stime -- system time used by the process (current-time)
7208 time -- sum of utime and stime (current-time)
7209 cutime -- user time used by the process and its children (current-time)
7210 cstime -- system time used by the process and its children (current-time)
7211 ctime -- sum of cutime and cstime (current-time)
7212 pri -- priority of the process (number)
7213 nice -- nice value of the process (number)
7214 thcount -- process thread count (number)
7215 start -- time the process started (current-time)
7216 vsize -- virtual memory size of the process in KB's (number)
7217 rss -- resident set size of the process in KB's (number)
7218 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7219 pcpu -- percents of CPU time used by the process (floating-point number)
7220 pmem -- percents of total physical memory used by process's resident set
7221 (floating-point number)
7222 args -- command line which invoked the process (string). */)
7225 return system_process_attributes (pid
);
7229 /* This is not called "init_process" because that is the name of a
7230 Mach system call, so it would cause problems on Darwin systems. */
7232 init_process_emacs (void)
7237 inhibit_sentinels
= 0;
7241 if (! noninteractive
|| initialized
)
7244 struct sigaction action
;
7245 emacs_sigaction_init (&action
, deliver_child_signal
);
7246 sigaction (SIGCHLD
, &action
, 0);
7250 FD_ZERO (&input_wait_mask
);
7251 FD_ZERO (&non_keyboard_wait_mask
);
7252 FD_ZERO (&non_process_wait_mask
);
7253 FD_ZERO (&write_mask
);
7254 max_process_desc
= 0;
7255 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7257 #ifdef NON_BLOCKING_CONNECT
7258 FD_ZERO (&connect_wait_mask
);
7259 num_pending_connects
= 0;
7262 #ifdef ADAPTIVE_READ_BUFFERING
7263 process_output_delay_count
= 0;
7264 process_output_skip
= 0;
7267 /* Don't do this, it caused infinite select loops. The display
7268 method should call add_keyboard_wait_descriptor on stdin if it
7271 FD_SET (0, &input_wait_mask
);
7274 Vprocess_alist
= Qnil
;
7276 deleted_pid_list
= Qnil
;
7278 for (i
= 0; i
< MAXDESC
; i
++)
7280 chan_process
[i
] = Qnil
;
7281 proc_buffered_char
[i
] = -1;
7283 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7284 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7285 #ifdef DATAGRAM_SOCKETS
7286 memset (datagram_address
, 0, sizeof datagram_address
);
7290 Lisp_Object subfeatures
= Qnil
;
7291 const struct socket_options
*sopt
;
7293 #define ADD_SUBFEATURE(key, val) \
7294 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7296 #ifdef NON_BLOCKING_CONNECT
7297 ADD_SUBFEATURE (QCnowait
, Qt
);
7299 #ifdef DATAGRAM_SOCKETS
7300 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7302 #ifdef HAVE_SEQPACKET
7303 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7305 #ifdef HAVE_LOCAL_SOCKETS
7306 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7308 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7310 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7312 #ifdef HAVE_GETSOCKNAME
7313 ADD_SUBFEATURE (QCservice
, Qt
);
7315 #if O_NONBLOCK || O_NDELAY
7316 ADD_SUBFEATURE (QCserver
, Qt
);
7319 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7320 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7322 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7325 #if defined (DARWIN_OS)
7326 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7327 processes. As such, we only change the default value. */
7330 char const *release
= (STRINGP (Voperating_system_release
)
7331 ? SSDATA (Voperating_system_release
)
7333 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7334 Vprocess_connection_type
= Qnil
;
7338 #endif /* subprocesses */
7343 syms_of_process (void)
7347 DEFSYM (Qprocessp
, "processp");
7348 DEFSYM (Qrun
, "run");
7349 DEFSYM (Qstop
, "stop");
7350 DEFSYM (Qsignal
, "signal");
7352 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7355 Qexit = intern_c_string ("exit");
7356 staticpro (&Qexit); */
7358 DEFSYM (Qopen
, "open");
7359 DEFSYM (Qclosed
, "closed");
7360 DEFSYM (Qconnect
, "connect");
7361 DEFSYM (Qfailed
, "failed");
7362 DEFSYM (Qlisten
, "listen");
7363 DEFSYM (Qlocal
, "local");
7364 DEFSYM (Qipv4
, "ipv4");
7366 DEFSYM (Qipv6
, "ipv6");
7368 DEFSYM (Qdatagram
, "datagram");
7369 DEFSYM (Qseqpacket
, "seqpacket");
7371 DEFSYM (QCport
, ":port");
7372 DEFSYM (QCspeed
, ":speed");
7373 DEFSYM (QCprocess
, ":process");
7375 DEFSYM (QCbytesize
, ":bytesize");
7376 DEFSYM (QCstopbits
, ":stopbits");
7377 DEFSYM (QCparity
, ":parity");
7378 DEFSYM (Qodd
, "odd");
7379 DEFSYM (Qeven
, "even");
7380 DEFSYM (QCflowcontrol
, ":flowcontrol");
7383 DEFSYM (QCsummary
, ":summary");
7385 DEFSYM (Qreal
, "real");
7386 DEFSYM (Qnetwork
, "network");
7387 DEFSYM (Qserial
, "serial");
7388 DEFSYM (QCbuffer
, ":buffer");
7389 DEFSYM (QChost
, ":host");
7390 DEFSYM (QCservice
, ":service");
7391 DEFSYM (QClocal
, ":local");
7392 DEFSYM (QCremote
, ":remote");
7393 DEFSYM (QCcoding
, ":coding");
7394 DEFSYM (QCserver
, ":server");
7395 DEFSYM (QCnowait
, ":nowait");
7396 DEFSYM (QCsentinel
, ":sentinel");
7397 DEFSYM (QClog
, ":log");
7398 DEFSYM (QCnoquery
, ":noquery");
7399 DEFSYM (QCstop
, ":stop");
7400 DEFSYM (QCoptions
, ":options");
7401 DEFSYM (QCplist
, ":plist");
7403 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7405 staticpro (&Vprocess_alist
);
7407 staticpro (&deleted_pid_list
);
7410 #endif /* subprocesses */
7412 DEFSYM (QCname
, ":name");
7413 DEFSYM (QCtype
, ":type");
7415 DEFSYM (Qeuid
, "euid");
7416 DEFSYM (Qegid
, "egid");
7417 DEFSYM (Quser
, "user");
7418 DEFSYM (Qgroup
, "group");
7419 DEFSYM (Qcomm
, "comm");
7420 DEFSYM (Qstate
, "state");
7421 DEFSYM (Qppid
, "ppid");
7422 DEFSYM (Qpgrp
, "pgrp");
7423 DEFSYM (Qsess
, "sess");
7424 DEFSYM (Qttname
, "ttname");
7425 DEFSYM (Qtpgid
, "tpgid");
7426 DEFSYM (Qminflt
, "minflt");
7427 DEFSYM (Qmajflt
, "majflt");
7428 DEFSYM (Qcminflt
, "cminflt");
7429 DEFSYM (Qcmajflt
, "cmajflt");
7430 DEFSYM (Qutime
, "utime");
7431 DEFSYM (Qstime
, "stime");
7432 DEFSYM (Qtime
, "time");
7433 DEFSYM (Qcutime
, "cutime");
7434 DEFSYM (Qcstime
, "cstime");
7435 DEFSYM (Qctime
, "ctime");
7436 DEFSYM (Qpri
, "pri");
7437 DEFSYM (Qnice
, "nice");
7438 DEFSYM (Qthcount
, "thcount");
7439 DEFSYM (Qstart
, "start");
7440 DEFSYM (Qvsize
, "vsize");
7441 DEFSYM (Qrss
, "rss");
7442 DEFSYM (Qetime
, "etime");
7443 DEFSYM (Qpcpu
, "pcpu");
7444 DEFSYM (Qpmem
, "pmem");
7445 DEFSYM (Qargs
, "args");
7447 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7448 doc
: /* Non-nil means delete processes immediately when they exit.
7449 A value of nil means don't delete them until `list-processes' is run. */);
7451 delete_exited_processes
= 1;
7454 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7455 doc
: /* Control type of device used to communicate with subprocesses.
7456 Values are nil to use a pipe, or t or `pty' to use a pty.
7457 The value has no effect if the system has no ptys or if all ptys are busy:
7458 then a pipe is used in any case.
7459 The value takes effect when `start-process' is called. */);
7460 Vprocess_connection_type
= Qt
;
7462 #ifdef ADAPTIVE_READ_BUFFERING
7463 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7464 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7465 On some systems, when Emacs reads the output from a subprocess, the output data
7466 is read in very small blocks, potentially resulting in very poor performance.
7467 This behavior can be remedied to some extent by setting this variable to a
7468 non-nil value, as it will automatically delay reading from such processes, to
7469 allow them to produce more output before Emacs tries to read it.
7470 If the value is t, the delay is reset after each write to the process; any other
7471 non-nil value means that the delay is not reset on write.
7472 The variable takes effect when `start-process' is called. */);
7473 Vprocess_adaptive_read_buffering
= Qt
;
7476 defsubr (&Sprocessp
);
7477 defsubr (&Sget_process
);
7478 defsubr (&Sdelete_process
);
7479 defsubr (&Sprocess_status
);
7480 defsubr (&Sprocess_exit_status
);
7481 defsubr (&Sprocess_id
);
7482 defsubr (&Sprocess_name
);
7483 defsubr (&Sprocess_tty_name
);
7484 defsubr (&Sprocess_command
);
7485 defsubr (&Sset_process_buffer
);
7486 defsubr (&Sprocess_buffer
);
7487 defsubr (&Sprocess_mark
);
7488 defsubr (&Sset_process_filter
);
7489 defsubr (&Sprocess_filter
);
7490 defsubr (&Sset_process_sentinel
);
7491 defsubr (&Sprocess_sentinel
);
7492 defsubr (&Sset_process_window_size
);
7493 defsubr (&Sset_process_inherit_coding_system_flag
);
7494 defsubr (&Sset_process_query_on_exit_flag
);
7495 defsubr (&Sprocess_query_on_exit_flag
);
7496 defsubr (&Sprocess_contact
);
7497 defsubr (&Sprocess_plist
);
7498 defsubr (&Sset_process_plist
);
7499 defsubr (&Sprocess_list
);
7500 defsubr (&Sstart_process
);
7501 defsubr (&Sserial_process_configure
);
7502 defsubr (&Smake_serial_process
);
7503 defsubr (&Sset_network_process_option
);
7504 defsubr (&Smake_network_process
);
7505 defsubr (&Sformat_network_address
);
7506 #if defined (HAVE_NET_IF_H)
7508 defsubr (&Snetwork_interface_list
);
7510 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7511 defsubr (&Snetwork_interface_info
);
7513 #endif /* defined (HAVE_NET_IF_H) */
7514 #ifdef DATAGRAM_SOCKETS
7515 defsubr (&Sprocess_datagram_address
);
7516 defsubr (&Sset_process_datagram_address
);
7518 defsubr (&Saccept_process_output
);
7519 defsubr (&Sprocess_send_region
);
7520 defsubr (&Sprocess_send_string
);
7521 defsubr (&Sinterrupt_process
);
7522 defsubr (&Skill_process
);
7523 defsubr (&Squit_process
);
7524 defsubr (&Sstop_process
);
7525 defsubr (&Scontinue_process
);
7526 defsubr (&Sprocess_running_child_p
);
7527 defsubr (&Sprocess_send_eof
);
7528 defsubr (&Ssignal_process
);
7529 defsubr (&Swaiting_for_user_input_p
);
7530 defsubr (&Sprocess_type
);
7531 defsubr (&Sset_process_coding_system
);
7532 defsubr (&Sprocess_coding_system
);
7533 defsubr (&Sset_process_filter_multibyte
);
7534 defsubr (&Sprocess_filter_multibyte_p
);
7536 #endif /* subprocesses */
7538 defsubr (&Sget_buffer_process
);
7539 defsubr (&Sprocess_inherit_coding_system_flag
);
7540 defsubr (&Slist_system_processes
);
7541 defsubr (&Sprocess_attributes
);