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 /* This is for DOS_NT ports. FIXME: Remove this old portability cruft
134 by having DOS_NT ports implement waitpid instead of wait. Nowadays
135 POSIXish hosts all define waitpid, WNOHANG, and WUNTRACED, as these
136 have been standard since POSIX.1-1988. */
139 # define waitpid(pid, status, options) wait (status)
145 /* Work around GCC 4.7.0 bug with strict overflow checking; see
146 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
147 These lines can be removed once the GCC bug is fixed. */
148 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
149 # pragma GCC diagnostic ignored "-Wstrict-overflow"
152 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
153 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
154 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
155 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
156 Lisp_Object QCname
, QCtype
;
158 /* Non-zero if keyboard input is on hold, zero otherwise. */
160 static int kbd_is_on_hold
;
162 /* Nonzero means don't run process sentinels. This is used
164 int inhibit_sentinels
;
168 Lisp_Object Qprocessp
;
169 static Lisp_Object Qrun
, Qstop
, Qsignal
;
170 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
172 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
173 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
175 static Lisp_Object Qipv6
;
177 static Lisp_Object QCport
, QCprocess
;
179 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
180 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
181 static Lisp_Object QCbuffer
, QChost
, QCservice
;
182 static Lisp_Object QClocal
, QCremote
, QCcoding
;
183 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
184 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
185 static Lisp_Object Qlast_nonmenu_event
;
187 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
188 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
189 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
190 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
196 /* Number of events of change of status of a process. */
197 static EMACS_INT process_tick
;
198 /* Number of events for which the user or sentinel has been notified. */
199 static EMACS_INT update_tick
;
201 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
203 /* Only W32 has this, it really means that select can't take write mask. */
204 #ifdef BROKEN_NON_BLOCKING_CONNECT
205 #undef NON_BLOCKING_CONNECT
206 #define SELECT_CANT_DO_WRITE_MASK
208 #ifndef NON_BLOCKING_CONNECT
210 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
211 #if defined (O_NONBLOCK) || defined (O_NDELAY)
212 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
213 #define NON_BLOCKING_CONNECT
214 #endif /* EWOULDBLOCK || EINPROGRESS */
215 #endif /* O_NONBLOCK || O_NDELAY */
216 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
217 #endif /* HAVE_SELECT */
218 #endif /* NON_BLOCKING_CONNECT */
219 #endif /* BROKEN_NON_BLOCKING_CONNECT */
221 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
222 this system. We need to read full packets, so we need a
223 "non-destructive" select. So we require either native select,
224 or emulation of select using FIONREAD. */
226 #ifndef BROKEN_DATAGRAM_SOCKETS
227 # if defined HAVE_SELECT || defined USABLE_FIONREAD
228 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
229 # define DATAGRAM_SOCKETS
234 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
235 # define HAVE_SEQPACKET
238 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
239 #define ADAPTIVE_READ_BUFFERING
242 #ifdef ADAPTIVE_READ_BUFFERING
243 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
244 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
245 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
247 /* Number of processes which have a non-zero read_output_delay,
248 and therefore might be delayed for adaptive read buffering. */
250 static int process_output_delay_count
;
252 /* Non-zero if any process has non-nil read_output_skip. */
254 static int process_output_skip
;
257 #define process_output_delay_count 0
260 static void create_process (Lisp_Object
, char **, Lisp_Object
);
262 static int keyboard_bit_set (SELECT_TYPE
*);
264 static void deactivate_process (Lisp_Object
);
265 static void status_notify (struct Lisp_Process
*);
266 static int read_process_output (Lisp_Object
, int);
267 static void handle_child_signal (int);
268 static void create_pty (Lisp_Object
);
270 /* If we support a window system, turn on the code to poll periodically
271 to detect C-g. It isn't actually used when doing interrupt input. */
272 #ifdef HAVE_WINDOW_SYSTEM
273 #define POLL_FOR_INPUT
276 static Lisp_Object
get_process (register Lisp_Object name
);
277 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
279 /* Mask of bits indicating the descriptors that we wait for input on. */
281 static SELECT_TYPE input_wait_mask
;
283 /* Mask that excludes keyboard input descriptor(s). */
285 static SELECT_TYPE non_keyboard_wait_mask
;
287 /* Mask that excludes process input descriptor(s). */
289 static SELECT_TYPE non_process_wait_mask
;
291 /* Mask for selecting for write. */
293 static SELECT_TYPE write_mask
;
295 #ifdef NON_BLOCKING_CONNECT
296 /* Mask of bits indicating the descriptors that we wait for connect to
297 complete on. Once they complete, they are removed from this mask
298 and added to the input_wait_mask and non_keyboard_wait_mask. */
300 static SELECT_TYPE connect_wait_mask
;
302 /* Number of bits set in connect_wait_mask. */
303 static int num_pending_connects
;
304 #endif /* NON_BLOCKING_CONNECT */
306 /* The largest descriptor currently in use for a process object. */
307 static int max_process_desc
;
309 /* The largest descriptor currently in use for input. */
310 static int max_input_desc
;
312 /* Indexed by descriptor, gives the process (if any) for that descriptor */
313 static Lisp_Object chan_process
[MAXDESC
];
315 /* Alist of elements (NAME . PROCESS) */
316 static Lisp_Object Vprocess_alist
;
318 /* Buffered-ahead input char from process, indexed by channel.
319 -1 means empty (no char is buffered).
320 Used on sys V where the only way to tell if there is any
321 output from the process is to read at least one char.
322 Always -1 on systems that support FIONREAD. */
324 static int proc_buffered_char
[MAXDESC
];
326 /* Table of `struct coding-system' for each process. */
327 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
328 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
330 #ifdef DATAGRAM_SOCKETS
331 /* Table of `partner address' for datagram sockets. */
332 static struct sockaddr_and_len
{
335 } datagram_address
[MAXDESC
];
336 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
337 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
339 #define DATAGRAM_CHAN_P(chan) (0)
340 #define DATAGRAM_CONN_P(proc) (0)
343 /* Maximum number of bytes to send to a pty without an eof. */
344 static int pty_max_bytes
;
346 /* These setters are used only in this file, so they can be private. */
348 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
353 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
358 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
360 p
->decode_coding_system
= val
;
363 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
365 p
->decoding_buf
= val
;
368 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
370 p
->encode_coding_system
= val
;
373 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
375 p
->encoding_buf
= val
;
378 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
383 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
388 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
393 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
398 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
403 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
408 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
413 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
418 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
423 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
425 p
->write_queue
= val
;
430 static struct fd_callback_data
436 int condition
; /* mask of the defines above. */
437 } fd_callback_info
[MAXDESC
];
440 /* Add a file descriptor FD to be monitored for when read is possible.
441 When read is possible, call FUNC with argument DATA. */
444 add_read_fd (int fd
, fd_callback func
, void *data
)
446 eassert (fd
< MAXDESC
);
447 add_keyboard_wait_descriptor (fd
);
449 fd_callback_info
[fd
].func
= func
;
450 fd_callback_info
[fd
].data
= data
;
451 fd_callback_info
[fd
].condition
|= FOR_READ
;
454 /* Stop monitoring file descriptor FD for when read is possible. */
457 delete_read_fd (int fd
)
459 eassert (fd
< MAXDESC
);
460 delete_keyboard_wait_descriptor (fd
);
462 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
463 if (fd_callback_info
[fd
].condition
== 0)
465 fd_callback_info
[fd
].func
= 0;
466 fd_callback_info
[fd
].data
= 0;
470 /* Add a file descriptor FD to be monitored for when write is possible.
471 When write is possible, call FUNC with argument DATA. */
474 add_write_fd (int fd
, fd_callback func
, void *data
)
476 eassert (fd
< MAXDESC
);
477 FD_SET (fd
, &write_mask
);
478 if (fd
> max_input_desc
)
481 fd_callback_info
[fd
].func
= func
;
482 fd_callback_info
[fd
].data
= data
;
483 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
486 /* Stop monitoring file descriptor FD for when write is possible. */
489 delete_write_fd (int fd
)
491 int lim
= max_input_desc
;
493 eassert (fd
< MAXDESC
);
494 FD_CLR (fd
, &write_mask
);
495 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
496 if (fd_callback_info
[fd
].condition
== 0)
498 fd_callback_info
[fd
].func
= 0;
499 fd_callback_info
[fd
].data
= 0;
501 if (fd
== max_input_desc
)
502 for (fd
= lim
; fd
>= 0; fd
--)
503 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
513 /* Compute the Lisp form of the process status, p->status, from
514 the numeric status that was returned by `wait'. */
516 static Lisp_Object
status_convert (int);
519 update_status (struct Lisp_Process
*p
)
521 eassert (p
->raw_status_new
);
522 pset_status (p
, status_convert (p
->raw_status
));
523 p
->raw_status_new
= 0;
526 /* Convert a process status word in Unix format to
527 the list that we use internally. */
530 status_convert (int w
)
533 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
534 else if (WIFEXITED (w
))
535 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
536 WCOREDUMP (w
) ? Qt
: Qnil
));
537 else if (WIFSIGNALED (w
))
538 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
539 WCOREDUMP (w
) ? Qt
: Qnil
));
544 /* Given a status-list, extract the three pieces of information
545 and store them individually through the three pointers. */
548 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
562 *code
= XFASTINT (XCAR (tem
));
564 *coredump
= !NILP (tem
);
568 /* Return a string describing a process status list. */
571 status_message (struct Lisp_Process
*p
)
573 Lisp_Object status
= p
->status
;
576 Lisp_Object string
, string2
;
578 decode_status (status
, &symbol
, &code
, &coredump
);
580 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
583 synchronize_system_messages_locale ();
584 signame
= strsignal (code
);
586 string
= build_string ("unknown");
591 string
= build_unibyte_string (signame
);
592 if (! NILP (Vlocale_coding_system
))
593 string
= (code_convert_string_norecord
594 (string
, Vlocale_coding_system
, 0));
595 c1
= STRING_CHAR (SDATA (string
));
598 Faset (string
, make_number (0), make_number (c2
));
600 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
601 return concat2 (string
, string2
);
603 else if (EQ (symbol
, Qexit
))
606 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
608 return build_string ("finished\n");
609 string
= Fnumber_to_string (make_number (code
));
610 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
611 return concat3 (build_string ("exited abnormally with code "),
614 else if (EQ (symbol
, Qfailed
))
616 string
= Fnumber_to_string (make_number (code
));
617 string2
= build_string ("\n");
618 return concat3 (build_string ("failed with code "),
622 return Fcopy_sequence (Fsymbol_name (symbol
));
627 /* The file name of the pty opened by allocate_pty. */
628 static char pty_name
[24];
630 /* Open an available pty, returning a file descriptor.
631 Return -1 on failure.
632 The file name of the terminal corresponding to the pty
633 is left in the variable pty_name. */
644 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
645 for (i
= 0; i
< 16; i
++)
648 #ifdef PTY_NAME_SPRINTF
651 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
652 #endif /* no PTY_NAME_SPRINTF */
656 #else /* no PTY_OPEN */
659 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
661 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
664 #endif /* no PTY_OPEN */
668 /* check to make certain that both sides are available
669 this avoids a nasty yet stupid bug in rlogins */
670 #ifdef PTY_TTY_NAME_SPRINTF
673 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
674 #endif /* no PTY_TTY_NAME_SPRINTF */
675 if (access (pty_name
, 6) != 0)
690 #endif /* HAVE_PTYS */
693 make_process (Lisp_Object name
)
695 register Lisp_Object val
, tem
, name1
;
696 register struct Lisp_Process
*p
;
697 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
700 p
= allocate_process ();
701 /* Initialize Lisp data. Note that allocate_process initializes all
702 Lisp data to nil, so do it only for slots which should not be nil. */
703 pset_status (p
, Qrun
);
704 pset_mark (p
, Fmake_marker ());
706 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
707 non-Lisp data, so do it only for slots which should not be zero. */
712 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
715 /* If name is already in use, modify it until it is unused. */
720 tem
= Fget_process (name1
);
721 if (NILP (tem
)) break;
722 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
726 XSETPROCESS (val
, p
);
727 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
732 remove_process (register Lisp_Object proc
)
734 register Lisp_Object pair
;
736 pair
= Frassq (proc
, Vprocess_alist
);
737 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
739 deactivate_process (proc
);
743 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
744 doc
: /* Return t if OBJECT is a process. */)
747 return PROCESSP (object
) ? Qt
: Qnil
;
750 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
751 doc
: /* Return the process named NAME, or nil if there is none. */)
752 (register Lisp_Object name
)
757 return Fcdr (Fassoc (name
, Vprocess_alist
));
760 /* This is how commands for the user decode process arguments. It
761 accepts a process, a process name, a buffer, a buffer name, or nil.
762 Buffers denote the first process in the buffer, and nil denotes the
766 get_process (register Lisp_Object name
)
768 register Lisp_Object proc
, obj
;
771 obj
= Fget_process (name
);
773 obj
= Fget_buffer (name
);
775 error ("Process %s does not exist", SDATA (name
));
777 else if (NILP (name
))
778 obj
= Fcurrent_buffer ();
782 /* Now obj should be either a buffer object or a process object.
786 proc
= Fget_buffer_process (obj
);
788 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
800 /* Fdelete_process promises to immediately forget about the process, but in
801 reality, Emacs needs to remember those processes until they have been
802 treated by the SIGCHLD handler and waitpid has been invoked on them;
803 otherwise they might fill up the kernel's process table. */
804 static Lisp_Object deleted_pid_list
;
807 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
808 doc
: /* Delete PROCESS: kill it and forget about it immediately.
809 PROCESS may be a process, a buffer, the name of a process or buffer, or
810 nil, indicating the current buffer's process. */)
811 (register Lisp_Object process
)
813 register struct Lisp_Process
*p
;
815 process
= get_process (process
);
816 p
= XPROCESS (process
);
818 p
->raw_status_new
= 0;
819 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
821 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
822 p
->tick
= ++process_tick
;
824 redisplay_preserve_echo_area (13);
826 else if (p
->infd
>= 0)
832 /* No problem storing the pid here, as it is still in Vprocess_alist. */
833 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
834 /* GC treated elements set to nil. */
835 Fdelq (Qnil
, deleted_pid_list
));
836 /* If the process has already signaled, remove it from the list. */
837 if (p
->raw_status_new
)
840 if (CONSP (p
->status
))
841 symbol
= XCAR (p
->status
);
842 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
844 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
848 Fkill_process (process
, Qnil
);
849 /* Do this now, since remove_process will make the
850 SIGCHLD handler do nothing. */
851 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
852 p
->tick
= ++process_tick
;
854 redisplay_preserve_echo_area (13);
857 remove_process (process
);
861 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
862 doc
: /* Return the status of PROCESS.
863 The returned value is one of the following symbols:
864 run -- for a process that is running.
865 stop -- for a process stopped but continuable.
866 exit -- for a process that has exited.
867 signal -- for a process that has got a fatal signal.
868 open -- for a network stream connection that is open.
869 listen -- for a network stream server that is listening.
870 closed -- for a network stream connection that is closed.
871 connect -- when waiting for a non-blocking connection to complete.
872 failed -- when a non-blocking connection has failed.
873 nil -- if arg is a process name and no such process exists.
874 PROCESS may be a process, a buffer, the name of a process, or
875 nil, indicating the current buffer's process. */)
876 (register Lisp_Object process
)
878 register struct Lisp_Process
*p
;
879 register Lisp_Object status
;
881 if (STRINGP (process
))
882 process
= Fget_process (process
);
884 process
= get_process (process
);
889 p
= XPROCESS (process
);
890 if (p
->raw_status_new
)
894 status
= XCAR (status
);
895 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
897 if (EQ (status
, Qexit
))
899 else if (EQ (p
->command
, Qt
))
901 else if (EQ (status
, Qrun
))
907 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
909 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
910 If PROCESS has not yet exited or died, return 0. */)
911 (register Lisp_Object process
)
913 CHECK_PROCESS (process
);
914 if (XPROCESS (process
)->raw_status_new
)
915 update_status (XPROCESS (process
));
916 if (CONSP (XPROCESS (process
)->status
))
917 return XCAR (XCDR (XPROCESS (process
)->status
));
918 return make_number (0);
921 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
922 doc
: /* Return the process id of PROCESS.
923 This is the pid of the external process which PROCESS uses or talks to.
924 For a network connection, this value is nil. */)
925 (register Lisp_Object process
)
929 CHECK_PROCESS (process
);
930 pid
= XPROCESS (process
)->pid
;
931 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
934 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
935 doc
: /* Return the name of PROCESS, as a string.
936 This is the name of the program invoked in PROCESS,
937 possibly modified to make it unique among process names. */)
938 (register Lisp_Object process
)
940 CHECK_PROCESS (process
);
941 return XPROCESS (process
)->name
;
944 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
945 doc
: /* Return the command that was executed to start PROCESS.
946 This is a list of strings, the first string being the program executed
947 and the rest of the strings being the arguments given to it.
948 For a network or serial process, this is nil (process is running) or t
949 \(process is stopped). */)
950 (register Lisp_Object process
)
952 CHECK_PROCESS (process
);
953 return XPROCESS (process
)->command
;
956 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
957 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
958 This is the terminal that the process itself reads and writes on,
959 not the name of the pty that Emacs uses to talk with that terminal. */)
960 (register Lisp_Object process
)
962 CHECK_PROCESS (process
);
963 return XPROCESS (process
)->tty_name
;
966 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
968 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
970 (register Lisp_Object process
, Lisp_Object buffer
)
972 struct Lisp_Process
*p
;
974 CHECK_PROCESS (process
);
976 CHECK_BUFFER (buffer
);
977 p
= XPROCESS (process
);
978 pset_buffer (p
, buffer
);
979 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
980 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
981 setup_process_coding_systems (process
);
985 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
987 doc
: /* Return the buffer PROCESS is associated with.
988 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
989 (register Lisp_Object process
)
991 CHECK_PROCESS (process
);
992 return XPROCESS (process
)->buffer
;
995 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
997 doc
: /* Return the marker for the end of the last output from PROCESS. */)
998 (register Lisp_Object process
)
1000 CHECK_PROCESS (process
);
1001 return XPROCESS (process
)->mark
;
1004 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1006 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1007 A value of t means stop accepting output from the process.
1009 When a process has a filter, its buffer is not used for output.
1010 Instead, each time it does output, the entire string of output is
1011 passed to the filter.
1013 The filter gets two arguments: the process and the string of output.
1014 The string argument is normally a multibyte string, except:
1015 - if the process' input coding system is no-conversion or raw-text,
1016 it is a unibyte string (the non-converted input), or else
1017 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1018 string (the result of converting the decoded input multibyte
1019 string to unibyte with `string-make-unibyte'). */)
1020 (register Lisp_Object process
, Lisp_Object filter
)
1022 struct Lisp_Process
*p
;
1024 CHECK_PROCESS (process
);
1025 p
= XPROCESS (process
);
1027 /* Don't signal an error if the process' input file descriptor
1028 is closed. This could make debugging Lisp more difficult,
1029 for example when doing something like
1031 (setq process (start-process ...))
1033 (set-process-filter process ...) */
1037 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1039 FD_CLR (p
->infd
, &input_wait_mask
);
1040 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1042 else if (EQ (p
->filter
, Qt
)
1043 /* Network or serial process not stopped: */
1044 && !EQ (p
->command
, Qt
))
1046 FD_SET (p
->infd
, &input_wait_mask
);
1047 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1051 pset_filter (p
, filter
);
1052 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1053 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1054 setup_process_coding_systems (process
);
1058 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1060 doc
: /* Returns the filter function of PROCESS; nil if none.
1061 See `set-process-filter' for more info on filter functions. */)
1062 (register Lisp_Object process
)
1064 CHECK_PROCESS (process
);
1065 return XPROCESS (process
)->filter
;
1068 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1070 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1071 The sentinel is called as a function when the process changes state.
1072 It gets two arguments: the process, and a string describing the change. */)
1073 (register Lisp_Object process
, Lisp_Object sentinel
)
1075 struct Lisp_Process
*p
;
1077 CHECK_PROCESS (process
);
1078 p
= XPROCESS (process
);
1080 pset_sentinel (p
, sentinel
);
1081 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1082 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1086 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1088 doc
: /* Return the sentinel of PROCESS; nil if none.
1089 See `set-process-sentinel' for more info on sentinels. */)
1090 (register Lisp_Object process
)
1092 CHECK_PROCESS (process
);
1093 return XPROCESS (process
)->sentinel
;
1096 DEFUN ("set-process-window-size", Fset_process_window_size
,
1097 Sset_process_window_size
, 3, 3, 0,
1098 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1099 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1101 CHECK_PROCESS (process
);
1102 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1103 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1105 if (XPROCESS (process
)->infd
< 0
1106 || set_window_size (XPROCESS (process
)->infd
,
1107 XINT (height
), XINT (width
)) <= 0)
1113 DEFUN ("set-process-inherit-coding-system-flag",
1114 Fset_process_inherit_coding_system_flag
,
1115 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1116 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1117 If the second argument FLAG is non-nil, then the variable
1118 `buffer-file-coding-system' of the buffer associated with PROCESS
1119 will be bound to the value of the coding system used to decode
1122 This is useful when the coding system specified for the process buffer
1123 leaves either the character code conversion or the end-of-line conversion
1124 unspecified, or if the coding system used to decode the process output
1125 is more appropriate for saving the process buffer.
1127 Binding the variable `inherit-process-coding-system' to non-nil before
1128 starting the process is an alternative way of setting the inherit flag
1129 for the process which will run.
1131 This function returns FLAG. */)
1132 (register Lisp_Object process
, Lisp_Object flag
)
1134 CHECK_PROCESS (process
);
1135 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1139 DEFUN ("set-process-query-on-exit-flag",
1140 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1142 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1143 If the second argument FLAG is non-nil, Emacs will query the user before
1144 exiting or killing a buffer if PROCESS is running. This function
1146 (register Lisp_Object process
, Lisp_Object flag
)
1148 CHECK_PROCESS (process
);
1149 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1153 DEFUN ("process-query-on-exit-flag",
1154 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1156 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1157 (register Lisp_Object process
)
1159 CHECK_PROCESS (process
);
1160 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1163 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1165 doc
: /* Return the contact info of PROCESS; t for a real child.
1166 For a network or serial connection, the value depends on the optional
1167 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1168 SERVICE) for a network connection or (PORT SPEED) for a serial
1169 connection. If KEY is t, the complete contact information for the
1170 connection is returned, else the specific value for the keyword KEY is
1171 returned. See `make-network-process' or `make-serial-process' for a
1172 list of keywords. */)
1173 (register Lisp_Object process
, Lisp_Object key
)
1175 Lisp_Object contact
;
1177 CHECK_PROCESS (process
);
1178 contact
= XPROCESS (process
)->childp
;
1180 #ifdef DATAGRAM_SOCKETS
1181 if (DATAGRAM_CONN_P (process
)
1182 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1183 contact
= Fplist_put (contact
, QCremote
,
1184 Fprocess_datagram_address (process
));
1187 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1189 if (NILP (key
) && NETCONN_P (process
))
1190 return Fcons (Fplist_get (contact
, QChost
),
1191 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1192 if (NILP (key
) && SERIALCONN_P (process
))
1193 return Fcons (Fplist_get (contact
, QCport
),
1194 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1195 return Fplist_get (contact
, key
);
1198 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1200 doc
: /* Return the plist of PROCESS. */)
1201 (register Lisp_Object process
)
1203 CHECK_PROCESS (process
);
1204 return XPROCESS (process
)->plist
;
1207 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1209 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1210 (register Lisp_Object process
, Lisp_Object plist
)
1212 CHECK_PROCESS (process
);
1215 pset_plist (XPROCESS (process
), plist
);
1219 #if 0 /* Turned off because we don't currently record this info
1220 in the process. Perhaps add it. */
1221 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1222 doc
: /* Return the connection type of PROCESS.
1223 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1224 a socket connection. */)
1225 (Lisp_Object process
)
1227 return XPROCESS (process
)->type
;
1231 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1232 doc
: /* Return the connection type of PROCESS.
1233 The value is either the symbol `real', `network', or `serial'.
1234 PROCESS may be a process, a buffer, the name of a process or buffer, or
1235 nil, indicating the current buffer's process. */)
1236 (Lisp_Object process
)
1239 proc
= get_process (process
);
1240 return XPROCESS (proc
)->type
;
1243 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1245 doc
: /* Convert network ADDRESS from internal format to a string.
1246 A 4 or 5 element vector represents an IPv4 address (with port number).
1247 An 8 or 9 element vector represents an IPv6 address (with port number).
1248 If optional second argument OMIT-PORT is non-nil, don't include a port
1249 number in the string, even when present in ADDRESS.
1250 Returns nil if format of ADDRESS is invalid. */)
1251 (Lisp_Object address
, Lisp_Object omit_port
)
1256 if (STRINGP (address
)) /* AF_LOCAL */
1259 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1261 register struct Lisp_Vector
*p
= XVECTOR (address
);
1262 ptrdiff_t size
= p
->header
.size
;
1263 Lisp_Object args
[10];
1266 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1268 args
[0] = build_string ("%d.%d.%d.%d");
1273 args
[0] = build_string ("%d.%d.%d.%d:%d");
1276 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1278 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1283 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1289 for (i
= 0; i
< nargs
; i
++)
1291 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1294 if (nargs
<= 5 /* IPv4 */
1295 && i
< 4 /* host, not port */
1296 && XINT (p
->contents
[i
]) > 255)
1299 args
[i
+1] = p
->contents
[i
];
1302 return Fformat (nargs
+1, args
);
1305 if (CONSP (address
))
1307 Lisp_Object args
[2];
1308 args
[0] = build_string ("<Family %d>");
1309 args
[1] = Fcar (address
);
1310 return Fformat (2, args
);
1316 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1317 doc
: /* Return a list of all processes. */)
1320 return Fmapcar (Qcdr
, Vprocess_alist
);
1323 /* Starting asynchronous inferior processes. */
1325 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1327 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1328 doc
: /* Start a program in a subprocess. Return the process object for it.
1329 NAME is name for process. It is modified if necessary to make it unique.
1330 BUFFER is the buffer (or buffer name) to associate with the process.
1332 Process output (both standard output and standard error streams) goes
1333 at end of BUFFER, unless you specify an output stream or filter
1334 function to handle the output. BUFFER may also be nil, meaning that
1335 this process is not associated with any buffer.
1337 PROGRAM is the program file name. It is searched for in `exec-path'
1338 (which see). If nil, just associate a pty with the buffer. Remaining
1339 arguments are strings to give program as arguments.
1341 If you want to separate standard output from standard error, invoke
1342 the command through a shell and redirect one of them using the shell
1345 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1346 (ptrdiff_t nargs
, Lisp_Object
*args
)
1348 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1349 register unsigned char **new_argv
;
1351 ptrdiff_t count
= SPECPDL_INDEX ();
1355 buffer
= Fget_buffer_create (buffer
);
1357 /* Make sure that the child will be able to chdir to the current
1358 buffer's current directory, or its unhandled equivalent. We
1359 can't just have the child check for an error when it does the
1360 chdir, since it's in a vfork.
1362 We have to GCPRO around this because Fexpand_file_name and
1363 Funhandled_file_name_directory might call a file name handling
1364 function. The argument list is protected by the caller, so all
1365 we really have to worry about is buffer. */
1367 struct gcpro gcpro1
, gcpro2
;
1369 current_dir
= BVAR (current_buffer
, directory
);
1371 GCPRO2 (buffer
, current_dir
);
1373 current_dir
= Funhandled_file_name_directory (current_dir
);
1374 if (NILP (current_dir
))
1375 /* If the file name handler says that current_dir is unreachable, use
1376 a sensible default. */
1377 current_dir
= build_string ("~/");
1378 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1379 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1380 report_file_error ("Setting current directory",
1381 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1387 CHECK_STRING (name
);
1391 if (!NILP (program
))
1392 CHECK_STRING (program
);
1394 proc
= make_process (name
);
1395 /* If an error occurs and we can't start the process, we want to
1396 remove it from the process list. This means that each error
1397 check in create_process doesn't need to call remove_process
1398 itself; it's all taken care of here. */
1399 record_unwind_protect (start_process_unwind
, proc
);
1401 pset_childp (XPROCESS (proc
), Qt
);
1402 pset_plist (XPROCESS (proc
), Qnil
);
1403 pset_type (XPROCESS (proc
), Qreal
);
1404 pset_buffer (XPROCESS (proc
), buffer
);
1405 pset_sentinel (XPROCESS (proc
), Qnil
);
1406 pset_filter (XPROCESS (proc
), Qnil
);
1407 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1410 /* AKA GNUTLS_INITSTAGE(proc). */
1411 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1412 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1415 #ifdef ADAPTIVE_READ_BUFFERING
1416 XPROCESS (proc
)->adaptive_read_buffering
1417 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1418 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1421 /* Make the process marker point into the process buffer (if any). */
1422 if (BUFFERP (buffer
))
1423 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1424 BUF_ZV (XBUFFER (buffer
)),
1425 BUF_ZV_BYTE (XBUFFER (buffer
)));
1428 /* Decide coding systems for communicating with the process. Here
1429 we don't setup the structure coding_system nor pay attention to
1430 unibyte mode. They are done in create_process. */
1432 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1433 Lisp_Object coding_systems
= Qt
;
1434 Lisp_Object val
, *args2
;
1435 struct gcpro gcpro1
, gcpro2
;
1437 val
= Vcoding_system_for_read
;
1440 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1441 args2
[0] = Qstart_process
;
1442 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1443 GCPRO2 (proc
, current_dir
);
1444 if (!NILP (program
))
1445 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1447 if (CONSP (coding_systems
))
1448 val
= XCAR (coding_systems
);
1449 else if (CONSP (Vdefault_process_coding_system
))
1450 val
= XCAR (Vdefault_process_coding_system
);
1452 pset_decode_coding_system (XPROCESS (proc
), val
);
1454 val
= Vcoding_system_for_write
;
1457 if (EQ (coding_systems
, Qt
))
1459 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1460 args2
[0] = Qstart_process
;
1461 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1462 GCPRO2 (proc
, current_dir
);
1463 if (!NILP (program
))
1464 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1467 if (CONSP (coding_systems
))
1468 val
= XCDR (coding_systems
);
1469 else if (CONSP (Vdefault_process_coding_system
))
1470 val
= XCDR (Vdefault_process_coding_system
);
1472 pset_encode_coding_system (XPROCESS (proc
), val
);
1473 /* Note: At this moment, the above coding system may leave
1474 text-conversion or eol-conversion unspecified. They will be
1475 decided after we read output from the process and decode it by
1476 some coding system, or just before we actually send a text to
1481 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1482 XPROCESS (proc
)->decoding_carryover
= 0;
1483 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1485 XPROCESS (proc
)->inherit_coding_system_flag
1486 = !(NILP (buffer
) || !inherit_process_coding_system
);
1488 if (!NILP (program
))
1490 /* If program file name is not absolute, search our path for it.
1491 Put the name we will really use in TEM. */
1492 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1493 && !(SCHARS (program
) > 1
1494 && IS_DEVICE_SEP (SREF (program
, 1))))
1496 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1499 GCPRO4 (name
, program
, buffer
, current_dir
);
1500 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1503 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1504 tem
= Fexpand_file_name (tem
, Qnil
);
1508 if (!NILP (Ffile_directory_p (program
)))
1509 error ("Specified program for new process is a directory");
1513 /* If program file name starts with /: for quoting a magic name,
1515 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1516 && SREF (tem
, 1) == ':')
1517 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1520 Lisp_Object arg_encoding
= Qnil
;
1521 struct gcpro gcpro1
;
1524 /* Encode the file name and put it in NEW_ARGV.
1525 That's where the child will use it to execute the program. */
1526 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1528 /* Here we encode arguments by the coding system used for sending
1529 data to the process. We don't support using different coding
1530 systems for encoding arguments and for encoding data sent to the
1533 for (i
= 3; i
< nargs
; i
++)
1535 tem
= Fcons (args
[i
], tem
);
1536 CHECK_STRING (XCAR (tem
));
1537 if (STRING_MULTIBYTE (XCAR (tem
)))
1539 if (NILP (arg_encoding
))
1540 arg_encoding
= (complement_process_encoding_system
1541 (XPROCESS (proc
)->encode_coding_system
));
1543 code_convert_string_norecord
1544 (XCAR (tem
), arg_encoding
, 1));
1551 /* Now that everything is encoded we can collect the strings into
1553 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1554 new_argv
[nargs
- 2] = 0;
1556 for (i
= nargs
- 2; i
-- != 0; )
1558 new_argv
[i
] = SDATA (XCAR (tem
));
1562 create_process (proc
, (char **) new_argv
, current_dir
);
1567 return unbind_to (count
, proc
);
1570 /* This function is the unwind_protect form for Fstart_process. If
1571 PROC doesn't have its pid set, then we know someone has signaled
1572 an error and the process wasn't started successfully, so we should
1573 remove it from the process list. */
1575 start_process_unwind (Lisp_Object proc
)
1577 if (!PROCESSP (proc
))
1580 /* Was PROC started successfully?
1581 -2 is used for a pty with no process, eg for gdb. */
1582 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1583 remove_process (proc
);
1589 create_process_1 (struct atimer
*timer
)
1591 /* Nothing to do. */
1596 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1598 int inchannel
, outchannel
;
1601 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1602 int wait_child_setup
[2];
1607 /* Use volatile to protect variables from being clobbered by vfork. */
1608 volatile int forkin
, forkout
;
1609 volatile int pty_flag
= 0;
1610 volatile Lisp_Object lisp_pty_name
= Qnil
;
1611 volatile Lisp_Object encoded_current_dir
;
1612 #if HAVE_WORKING_VFORK
1613 char **volatile save_environ
;
1616 inchannel
= outchannel
= -1;
1619 if (!NILP (Vprocess_connection_type
))
1620 outchannel
= inchannel
= allocate_pty ();
1624 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1625 /* On most USG systems it does not work to open the pty's tty here,
1626 then close it and reopen it in the child. */
1628 /* Don't let this terminal become our controlling terminal
1629 (in case we don't have one). */
1630 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1632 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1635 report_file_error ("Opening pty", Qnil
);
1637 forkin
= forkout
= -1;
1638 #endif /* not USG, or USG_SUBTTY_WORKS */
1640 lisp_pty_name
= build_string (pty_name
);
1643 #endif /* HAVE_PTYS */
1648 report_file_error ("Creating pipe", Qnil
);
1654 emacs_close (inchannel
);
1655 emacs_close (forkout
);
1656 report_file_error ("Creating pipe", Qnil
);
1662 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1666 tem
= pipe (wait_child_setup
);
1668 report_file_error ("Creating pipe", Qnil
);
1669 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1671 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1674 emacs_close (wait_child_setup
[0]);
1675 emacs_close (wait_child_setup
[1]);
1676 report_file_error ("Setting file descriptor flags", Qnil
);
1682 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1683 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1686 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1687 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1691 /* Record this as an active process, with its channels.
1692 As a result, child_setup will close Emacs's side of the pipes. */
1693 chan_process
[inchannel
] = process
;
1694 XPROCESS (process
)->infd
= inchannel
;
1695 XPROCESS (process
)->outfd
= outchannel
;
1697 /* Previously we recorded the tty descriptor used in the subprocess.
1698 It was only used for getting the foreground tty process, so now
1699 we just reopen the device (see emacs_get_tty_pgrp) as this is
1700 more portable (see USG_SUBTTY_WORKS above). */
1702 XPROCESS (process
)->pty_flag
= pty_flag
;
1703 pset_status (XPROCESS (process
), Qrun
);
1705 FD_SET (inchannel
, &input_wait_mask
);
1706 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1707 if (inchannel
> max_process_desc
)
1708 max_process_desc
= inchannel
;
1710 /* This may signal an error. */
1711 setup_process_coding_systems (process
);
1713 encoded_current_dir
= ENCODE_FILE (current_dir
);
1718 /* Block SIGCHLD until we have a chance to store the new fork's
1719 pid in its process structure. */
1720 sigemptyset (&blocked
);
1721 sigaddset (&blocked
, SIGCHLD
);
1722 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1725 #if HAVE_WORKING_VFORK
1726 /* child_setup must clobber environ on systems with true vfork.
1727 Protect it from permanent change. */
1728 save_environ
= environ
;
1734 #endif /* not WINDOWSNT */
1736 int xforkin
= forkin
;
1737 int xforkout
= forkout
;
1739 /* Make the pty be the controlling terminal of the process. */
1741 /* First, disconnect its current controlling terminal. */
1742 /* We tried doing setsid only if pty_flag, but it caused
1743 process_set_signal to fail on SGI when using a pipe. */
1745 /* Make the pty's terminal the controlling terminal. */
1746 if (pty_flag
&& xforkin
>= 0)
1749 /* We ignore the return value
1750 because faith@cs.unc.edu says that is necessary on Linux. */
1751 ioctl (xforkin
, TIOCSCTTY
, 0);
1754 #if defined (LDISC1)
1755 if (pty_flag
&& xforkin
>= 0)
1758 tcgetattr (xforkin
, &t
);
1760 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1761 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1764 #if defined (NTTYDISC) && defined (TIOCSETD)
1765 if (pty_flag
&& xforkin
>= 0)
1767 /* Use new line discipline. */
1768 int ldisc
= NTTYDISC
;
1769 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1774 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1775 can do TIOCSPGRP only to the process's controlling tty. */
1778 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1779 I can't test it since I don't have 4.3. */
1780 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1783 ioctl (j
, TIOCNOTTY
, 0);
1787 #endif /* TIOCNOTTY */
1789 #if !defined (DONT_REOPEN_PTY)
1790 /*** There is a suggestion that this ought to be a
1791 conditional on TIOCSPGRP, or !defined TIOCSCTTY.
1792 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1793 that system does seem to need this code, even though
1794 both TIOCSCTTY is defined. */
1795 /* Now close the pty (if we had it open) and reopen it.
1796 This makes the pty the controlling terminal of the subprocess. */
1800 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1803 emacs_close (xforkin
);
1804 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1808 emacs_write (1, "Couldn't open the pty terminal ", 31);
1809 emacs_write (1, pty_name
, strlen (pty_name
));
1810 emacs_write (1, "\n", 1);
1815 #endif /* not DONT_REOPEN_PTY */
1817 #ifdef SETUP_SLAVE_PTY
1822 #endif /* SETUP_SLAVE_PTY */
1824 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1825 Now reenable it in the child, so it will die when we want it to. */
1827 signal (SIGHUP
, SIG_DFL
);
1829 #endif /* HAVE_PTYS */
1831 signal (SIGINT
, SIG_DFL
);
1832 signal (SIGQUIT
, SIG_DFL
);
1834 /* Emacs ignores SIGPIPE, but the child should not. */
1835 signal (SIGPIPE
, SIG_DFL
);
1838 /* Stop blocking signals in the child. */
1839 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1843 child_setup_tty (xforkout
);
1845 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1846 new_argv
, 1, encoded_current_dir
);
1847 #else /* not WINDOWSNT */
1849 emacs_close (wait_child_setup
[0]);
1851 child_setup (xforkin
, xforkout
, xforkout
,
1852 new_argv
, 1, encoded_current_dir
);
1853 #endif /* not WINDOWSNT */
1856 /* Back in the parent process. */
1858 #if HAVE_WORKING_VFORK
1859 environ
= save_environ
;
1862 XPROCESS (process
)->pid
= pid
;
1864 XPROCESS (process
)->alive
= 1;
1866 /* Stop blocking signals in the parent. */
1868 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1875 emacs_close (forkin
);
1876 if (forkin
!= forkout
&& forkout
>= 0)
1877 emacs_close (forkout
);
1881 /* vfork succeeded. */
1884 register_child (pid
, inchannel
);
1885 #endif /* WINDOWSNT */
1887 /* If the subfork execv fails, and it exits,
1888 this close hangs. I don't know why.
1889 So have an interrupt jar it loose. */
1891 struct atimer
*timer
;
1892 EMACS_TIME offset
= make_emacs_time (1, 0);
1895 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1898 emacs_close (forkin
);
1900 cancel_atimer (timer
);
1904 if (forkin
!= forkout
&& forkout
>= 0)
1905 emacs_close (forkout
);
1907 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1909 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1910 /* Wait for child_setup to complete in case that vfork is
1911 actually defined as fork. The descriptor wait_child_setup[1]
1912 of a pipe is closed at the child side either by close-on-exec
1913 on successful execvp or the _exit call in child_setup. */
1917 emacs_close (wait_child_setup
[1]);
1918 emacs_read (wait_child_setup
[0], &dummy
, 1);
1919 emacs_close (wait_child_setup
[0]);
1924 /* Now generate the error if vfork failed. */
1926 report_file_error ("Doing vfork", Qnil
);
1930 create_pty (Lisp_Object process
)
1932 int inchannel
, outchannel
;
1935 inchannel
= outchannel
= -1;
1938 if (!NILP (Vprocess_connection_type
))
1939 outchannel
= inchannel
= allocate_pty ();
1943 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1944 /* On most USG systems it does not work to open the pty's tty here,
1945 then close it and reopen it in the child. */
1947 /* Don't let this terminal become our controlling terminal
1948 (in case we don't have one). */
1949 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1951 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1954 report_file_error ("Opening pty", Qnil
);
1955 #if defined (DONT_REOPEN_PTY)
1956 /* In the case that vfork is defined as fork, the parent process
1957 (Emacs) may send some data before the child process completes
1958 tty options setup. So we setup tty before forking. */
1959 child_setup_tty (forkout
);
1960 #endif /* DONT_REOPEN_PTY */
1961 #endif /* not USG, or USG_SUBTTY_WORKS */
1964 #endif /* HAVE_PTYS */
1967 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1968 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1971 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1972 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1976 /* Record this as an active process, with its channels.
1977 As a result, child_setup will close Emacs's side of the pipes. */
1978 chan_process
[inchannel
] = process
;
1979 XPROCESS (process
)->infd
= inchannel
;
1980 XPROCESS (process
)->outfd
= outchannel
;
1982 /* Previously we recorded the tty descriptor used in the subprocess.
1983 It was only used for getting the foreground tty process, so now
1984 we just reopen the device (see emacs_get_tty_pgrp) as this is
1985 more portable (see USG_SUBTTY_WORKS above). */
1987 XPROCESS (process
)->pty_flag
= pty_flag
;
1988 pset_status (XPROCESS (process
), Qrun
);
1989 setup_process_coding_systems (process
);
1991 FD_SET (inchannel
, &input_wait_mask
);
1992 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1993 if (inchannel
> max_process_desc
)
1994 max_process_desc
= inchannel
;
1996 XPROCESS (process
)->pid
= -2;
1999 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2002 pset_tty_name (XPROCESS (process
), Qnil
);
2006 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2007 The address family of sa is not included in the result. */
2010 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2012 Lisp_Object address
;
2015 register struct Lisp_Vector
*p
;
2017 /* Workaround for a bug in getsockname on BSD: Names bound to
2018 sockets in the UNIX domain are inaccessible; getsockname returns
2019 a zero length name. */
2020 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2021 return empty_unibyte_string
;
2023 switch (sa
->sa_family
)
2027 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2028 len
= sizeof (sin
->sin_addr
) + 1;
2029 address
= Fmake_vector (make_number (len
), Qnil
);
2030 p
= XVECTOR (address
);
2031 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2032 cp
= (unsigned char *) &sin
->sin_addr
;
2038 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2039 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2040 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2041 address
= Fmake_vector (make_number (len
), Qnil
);
2042 p
= XVECTOR (address
);
2043 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2044 for (i
= 0; i
< len
; i
++)
2045 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2049 #ifdef HAVE_LOCAL_SOCKETS
2052 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2053 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2054 if (sockun
->sun_path
[i
] == 0)
2056 return make_unibyte_string (sockun
->sun_path
, i
);
2060 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2061 address
= Fcons (make_number (sa
->sa_family
),
2062 Fmake_vector (make_number (len
), Qnil
));
2063 p
= XVECTOR (XCDR (address
));
2064 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2070 p
->contents
[i
++] = make_number (*cp
++);
2076 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2079 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2081 register struct Lisp_Vector
*p
;
2083 if (VECTORP (address
))
2085 p
= XVECTOR (address
);
2086 if (p
->header
.size
== 5)
2089 return sizeof (struct sockaddr_in
);
2092 else if (p
->header
.size
== 9)
2094 *familyp
= AF_INET6
;
2095 return sizeof (struct sockaddr_in6
);
2099 #ifdef HAVE_LOCAL_SOCKETS
2100 else if (STRINGP (address
))
2102 *familyp
= AF_LOCAL
;
2103 return sizeof (struct sockaddr_un
);
2106 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2107 && VECTORP (XCDR (address
)))
2109 struct sockaddr
*sa
;
2110 *familyp
= XINT (XCAR (address
));
2111 p
= XVECTOR (XCDR (address
));
2112 return p
->header
.size
+ sizeof (sa
->sa_family
);
2117 /* Convert an address object (vector or string) to an internal sockaddr.
2119 The address format has been basically validated by
2120 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2121 it could have come from user data. So if FAMILY is not valid,
2122 we return after zeroing *SA. */
2125 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2127 register struct Lisp_Vector
*p
;
2128 register unsigned char *cp
= NULL
;
2132 memset (sa
, 0, len
);
2134 if (VECTORP (address
))
2136 p
= XVECTOR (address
);
2137 if (family
== AF_INET
)
2139 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2140 len
= sizeof (sin
->sin_addr
) + 1;
2141 hostport
= XINT (p
->contents
[--len
]);
2142 sin
->sin_port
= htons (hostport
);
2143 cp
= (unsigned char *)&sin
->sin_addr
;
2144 sa
->sa_family
= family
;
2147 else if (family
== AF_INET6
)
2149 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2150 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2151 len
= sizeof (sin6
->sin6_addr
) + 1;
2152 hostport
= XINT (p
->contents
[--len
]);
2153 sin6
->sin6_port
= htons (hostport
);
2154 for (i
= 0; i
< len
; i
++)
2155 if (INTEGERP (p
->contents
[i
]))
2157 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2160 sa
->sa_family
= family
;
2167 else if (STRINGP (address
))
2169 #ifdef HAVE_LOCAL_SOCKETS
2170 if (family
== AF_LOCAL
)
2172 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2173 cp
= SDATA (address
);
2174 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2175 sockun
->sun_path
[i
] = *cp
++;
2176 sa
->sa_family
= family
;
2183 p
= XVECTOR (XCDR (address
));
2184 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2187 for (i
= 0; i
< len
; i
++)
2188 if (INTEGERP (p
->contents
[i
]))
2189 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2192 #ifdef DATAGRAM_SOCKETS
2193 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2195 doc
: /* Get the current datagram address associated with PROCESS. */)
2196 (Lisp_Object process
)
2200 CHECK_PROCESS (process
);
2202 if (!DATAGRAM_CONN_P (process
))
2205 channel
= XPROCESS (process
)->infd
;
2206 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2207 datagram_address
[channel
].len
);
2210 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2212 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2213 Returns nil upon error setting address, ADDRESS otherwise. */)
2214 (Lisp_Object process
, Lisp_Object address
)
2219 CHECK_PROCESS (process
);
2221 if (!DATAGRAM_CONN_P (process
))
2224 channel
= XPROCESS (process
)->infd
;
2226 len
= get_lisp_to_sockaddr_size (address
, &family
);
2227 if (datagram_address
[channel
].len
!= len
)
2229 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2235 static const struct socket_options
{
2236 /* The name of this option. Should be lowercase version of option
2237 name without SO_ prefix. */
2239 /* Option level SOL_... */
2241 /* Option number SO_... */
2243 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2244 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2245 } socket_options
[] =
2247 #ifdef SO_BINDTODEVICE
2248 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2251 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2254 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2257 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2260 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2263 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2266 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2269 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2271 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2274 /* Set option OPT to value VAL on socket S.
2276 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2277 Signals an error if setting a known option fails.
2281 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2284 const struct socket_options
*sopt
;
2289 name
= SSDATA (SYMBOL_NAME (opt
));
2290 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2291 if (strcmp (name
, sopt
->name
) == 0)
2294 switch (sopt
->opttype
)
2299 optval
= NILP (val
) ? 0 : 1;
2300 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2301 &optval
, sizeof (optval
));
2308 if (TYPE_RANGED_INTEGERP (int, val
))
2309 optval
= XINT (val
);
2311 error ("Bad option value for %s", name
);
2312 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2313 &optval
, sizeof (optval
));
2317 #ifdef SO_BINDTODEVICE
2320 char devname
[IFNAMSIZ
+1];
2322 /* This is broken, at least in the Linux 2.4 kernel.
2323 To unbind, the arg must be a zero integer, not the empty string.
2324 This should work on all systems. KFS. 2003-09-23. */
2325 memset (devname
, 0, sizeof devname
);
2328 char *arg
= SSDATA (val
);
2329 int len
= min (strlen (arg
), IFNAMSIZ
);
2330 memcpy (devname
, arg
, len
);
2332 else if (!NILP (val
))
2333 error ("Bad option value for %s", name
);
2334 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2343 struct linger linger
;
2346 linger
.l_linger
= 0;
2347 if (TYPE_RANGED_INTEGERP (int, val
))
2348 linger
.l_linger
= XINT (val
);
2350 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2351 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2352 &linger
, sizeof (linger
));
2362 report_file_error ("Cannot set network option",
2363 Fcons (opt
, Fcons (val
, Qnil
)));
2364 return (1 << sopt
->optbit
);
2368 DEFUN ("set-network-process-option",
2369 Fset_network_process_option
, Sset_network_process_option
,
2371 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2372 See `make-network-process' for a list of options and values.
2373 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2374 OPTION is not a supported option, return nil instead; otherwise return t. */)
2375 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2378 struct Lisp_Process
*p
;
2380 CHECK_PROCESS (process
);
2381 p
= XPROCESS (process
);
2382 if (!NETCONN1_P (p
))
2383 error ("Process is not a network process");
2387 error ("Process is not running");
2389 if (set_socket_option (s
, option
, value
))
2391 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2395 if (NILP (no_error
))
2396 error ("Unknown or unsupported option");
2402 DEFUN ("serial-process-configure",
2403 Fserial_process_configure
,
2404 Sserial_process_configure
,
2406 doc
: /* Configure speed, bytesize, etc. of a serial process.
2408 Arguments are specified as keyword/argument pairs. Attributes that
2409 are not given are re-initialized from the process's current
2410 configuration (available via the function `process-contact') or set to
2411 reasonable default values. The following arguments are defined:
2417 -- Any of these arguments can be given to identify the process that is
2418 to be configured. If none of these arguments is given, the current
2419 buffer's process is used.
2421 :speed SPEED -- SPEED is the speed of the serial port in bits per
2422 second, also called baud rate. Any value can be given for SPEED, but
2423 most serial ports work only at a few defined values between 1200 and
2424 115200, with 9600 being the most common value. If SPEED is nil, the
2425 serial port is not configured any further, i.e., all other arguments
2426 are ignored. This may be useful for special serial ports such as
2427 Bluetooth-to-serial converters which can only be configured through AT
2428 commands. A value of nil for SPEED can be used only when passed
2429 through `make-serial-process' or `serial-term'.
2431 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2432 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2434 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2435 `odd' (use odd parity), or the symbol `even' (use even parity). If
2436 PARITY is not given, no parity is used.
2438 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2439 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2440 is not given or nil, 1 stopbit is used.
2442 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2443 flowcontrol to be used, which is either nil (don't use flowcontrol),
2444 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2445 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2446 flowcontrol is used.
2448 `serial-process-configure' is called by `make-serial-process' for the
2449 initial configuration of the serial port.
2453 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2455 \(serial-process-configure
2456 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2458 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2460 usage: (serial-process-configure &rest ARGS) */)
2461 (ptrdiff_t nargs
, Lisp_Object
*args
)
2463 struct Lisp_Process
*p
;
2464 Lisp_Object contact
= Qnil
;
2465 Lisp_Object proc
= Qnil
;
2466 struct gcpro gcpro1
;
2468 contact
= Flist (nargs
, args
);
2471 proc
= Fplist_get (contact
, QCprocess
);
2473 proc
= Fplist_get (contact
, QCname
);
2475 proc
= Fplist_get (contact
, QCbuffer
);
2477 proc
= Fplist_get (contact
, QCport
);
2478 proc
= get_process (proc
);
2479 p
= XPROCESS (proc
);
2480 if (!EQ (p
->type
, Qserial
))
2481 error ("Not a serial process");
2483 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2489 serial_configure (p
, contact
);
2495 /* Used by make-serial-process to recover from errors. */
2497 make_serial_process_unwind (Lisp_Object proc
)
2499 if (!PROCESSP (proc
))
2501 remove_process (proc
);
2505 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2507 doc
: /* Create and return a serial port process.
2509 In Emacs, serial port connections are represented by process objects,
2510 so input and output work as for subprocesses, and `delete-process'
2511 closes a serial port connection. However, a serial process has no
2512 process id, it cannot be signaled, and the status codes are different
2513 from normal processes.
2515 `make-serial-process' creates a process and a buffer, on which you
2516 probably want to use `process-send-string'. Try \\[serial-term] for
2517 an interactive terminal. See below for examples.
2519 Arguments are specified as keyword/argument pairs. The following
2520 arguments are defined:
2522 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2523 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2524 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2525 the backslashes in strings).
2527 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2528 which this function calls.
2530 :name NAME -- NAME is the name of the process. If NAME is not given,
2531 the value of PORT is used.
2533 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2534 with the process. Process output goes at the end of that buffer,
2535 unless you specify an output stream or filter function to handle the
2536 output. If BUFFER is not given, the value of NAME is used.
2538 :coding CODING -- If CODING is a symbol, it specifies the coding
2539 system used for both reading and writing for this process. If CODING
2540 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2541 ENCODING is used for writing.
2543 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2544 the process is running. If BOOL is not given, query before exiting.
2546 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2547 In the stopped state, a serial process does not accept incoming data,
2548 but you can send outgoing data. The stopped state is cleared by
2549 `continue-process' and set by `stop-process'.
2551 :filter FILTER -- Install FILTER as the process filter.
2553 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2555 :plist PLIST -- Install PLIST as the initial plist of the process.
2561 -- This function calls `serial-process-configure' to handle these
2564 The original argument list, possibly modified by later configuration,
2565 is available via the function `process-contact'.
2569 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2571 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2573 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2575 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2577 usage: (make-serial-process &rest ARGS) */)
2578 (ptrdiff_t nargs
, Lisp_Object
*args
)
2581 Lisp_Object proc
, contact
, port
;
2582 struct Lisp_Process
*p
;
2583 struct gcpro gcpro1
;
2584 Lisp_Object name
, buffer
;
2585 Lisp_Object tem
, val
;
2586 ptrdiff_t specpdl_count
= -1;
2591 contact
= Flist (nargs
, args
);
2594 port
= Fplist_get (contact
, QCport
);
2596 error ("No port specified");
2597 CHECK_STRING (port
);
2599 if (NILP (Fplist_member (contact
, QCspeed
)))
2600 error (":speed not specified");
2601 if (!NILP (Fplist_get (contact
, QCspeed
)))
2602 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2604 name
= Fplist_get (contact
, QCname
);
2607 CHECK_STRING (name
);
2608 proc
= make_process (name
);
2609 specpdl_count
= SPECPDL_INDEX ();
2610 record_unwind_protect (make_serial_process_unwind
, proc
);
2611 p
= XPROCESS (proc
);
2613 fd
= serial_open (SSDATA (port
));
2616 if (fd
> max_process_desc
)
2617 max_process_desc
= fd
;
2618 chan_process
[fd
] = proc
;
2620 buffer
= Fplist_get (contact
, QCbuffer
);
2623 buffer
= Fget_buffer_create (buffer
);
2624 pset_buffer (p
, buffer
);
2626 pset_childp (p
, contact
);
2627 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2628 pset_type (p
, Qserial
);
2629 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2630 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2632 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2633 p
->kill_without_query
= 1;
2634 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2635 pset_command (p
, Qt
);
2638 if (!EQ (p
->command
, Qt
))
2640 FD_SET (fd
, &input_wait_mask
);
2641 FD_SET (fd
, &non_keyboard_wait_mask
);
2644 if (BUFFERP (buffer
))
2646 set_marker_both (p
->mark
, buffer
,
2647 BUF_ZV (XBUFFER (buffer
)),
2648 BUF_ZV_BYTE (XBUFFER (buffer
)));
2651 tem
= Fplist_member (contact
, QCcoding
);
2652 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2658 val
= XCAR (XCDR (tem
));
2662 else if (!NILP (Vcoding_system_for_read
))
2663 val
= Vcoding_system_for_read
;
2664 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2665 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2667 pset_decode_coding_system (p
, val
);
2672 val
= XCAR (XCDR (tem
));
2676 else if (!NILP (Vcoding_system_for_write
))
2677 val
= Vcoding_system_for_write
;
2678 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2679 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2681 pset_encode_coding_system (p
, val
);
2683 setup_process_coding_systems (proc
);
2684 pset_decoding_buf (p
, empty_unibyte_string
);
2685 p
->decoding_carryover
= 0;
2686 pset_encoding_buf (p
, empty_unibyte_string
);
2687 p
->inherit_coding_system_flag
2688 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2690 Fserial_process_configure (nargs
, args
);
2692 specpdl_ptr
= specpdl
+ specpdl_count
;
2698 /* Create a network stream/datagram client/server process. Treated
2699 exactly like a normal process when reading and writing. Primary
2700 differences are in status display and process deletion. A network
2701 connection has no PID; you cannot signal it. All you can do is
2702 stop/continue it and deactivate/close it via delete-process */
2704 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2706 doc
: /* Create and return a network server or client process.
2708 In Emacs, network connections are represented by process objects, so
2709 input and output work as for subprocesses and `delete-process' closes
2710 a network connection. However, a network process has no process id,
2711 it cannot be signaled, and the status codes are different from normal
2714 Arguments are specified as keyword/argument pairs. The following
2715 arguments are defined:
2717 :name NAME -- NAME is name for process. It is modified if necessary
2720 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2721 with the process. Process output goes at end of that buffer, unless
2722 you specify an output stream or filter function to handle the output.
2723 BUFFER may be also nil, meaning that this process is not associated
2726 :host HOST -- HOST is name of the host to connect to, or its IP
2727 address. The symbol `local' specifies the local host. If specified
2728 for a server process, it must be a valid name or address for the local
2729 host, and only clients connecting to that address will be accepted.
2731 :service SERVICE -- SERVICE is name of the service desired, or an
2732 integer specifying a port number to connect to. If SERVICE is t,
2733 a random port number is selected for the server. (If Emacs was
2734 compiled with getaddrinfo, a port number can also be specified as a
2735 string, e.g. "80", as well as an integer. This is not portable.)
2737 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2738 stream type connection, `datagram' creates a datagram type connection,
2739 `seqpacket' creates a reliable datagram connection.
2741 :family FAMILY -- FAMILY is the address (and protocol) family for the
2742 service specified by HOST and SERVICE. The default (nil) is to use
2743 whatever address family (IPv4 or IPv6) that is defined for the host
2744 and port number specified by HOST and SERVICE. Other address families
2746 local -- for a local (i.e. UNIX) address specified by SERVICE.
2747 ipv4 -- use IPv4 address family only.
2748 ipv6 -- use IPv6 address family only.
2750 :local ADDRESS -- ADDRESS is the local address used for the connection.
2751 This parameter is ignored when opening a client process. When specified
2752 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2754 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2755 connection. This parameter is ignored when opening a stream server
2756 process. For a datagram server process, it specifies the initial
2757 setting of the remote datagram address. When specified for a client
2758 process, the FAMILY, HOST, and SERVICE args are ignored.
2760 The format of ADDRESS depends on the address family:
2761 - An IPv4 address is represented as an vector of integers [A B C D P]
2762 corresponding to numeric IP address A.B.C.D and port number P.
2763 - A local address is represented as a string with the address in the
2764 local address space.
2765 - An "unsupported family" address is represented by a cons (F . AV)
2766 where F is the family number and AV is a vector containing the socket
2767 address data with one element per address data byte. Do not rely on
2768 this format in portable code, as it may depend on implementation
2769 defined constants, data sizes, and data structure alignment.
2771 :coding CODING -- If CODING is a symbol, it specifies the coding
2772 system used for both reading and writing for this process. If CODING
2773 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2774 ENCODING is used for writing.
2776 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2777 return without waiting for the connection to complete; instead, the
2778 sentinel function will be called with second arg matching "open" (if
2779 successful) or "failed" when the connect completes. Default is to use
2780 a blocking connect (i.e. wait) for stream type connections.
2782 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2783 running when Emacs is exited.
2785 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2786 In the stopped state, a server process does not accept new
2787 connections, and a client process does not handle incoming traffic.
2788 The stopped state is cleared by `continue-process' and set by
2791 :filter FILTER -- Install FILTER as the process filter.
2793 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2794 process filter are multibyte, otherwise they are unibyte.
2795 If this keyword is not specified, the strings are multibyte if
2796 the default value of `enable-multibyte-characters' is non-nil.
2798 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2800 :log LOG -- Install LOG as the server process log function. This
2801 function is called when the server accepts a network connection from a
2802 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2803 is the server process, CLIENT is the new process for the connection,
2804 and MESSAGE is a string.
2806 :plist PLIST -- Install PLIST as the new process' initial plist.
2808 :server QLEN -- if QLEN is non-nil, create a server process for the
2809 specified FAMILY, SERVICE, and connection type (stream or datagram).
2810 If QLEN is an integer, it is used as the max. length of the server's
2811 pending connection queue (also known as the backlog); the default
2812 queue length is 5. Default is to create a client process.
2814 The following network options can be specified for this connection:
2816 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2817 :dontroute BOOL -- Only send to directly connected hosts.
2818 :keepalive BOOL -- Send keep-alive messages on network stream.
2819 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2820 :oobinline BOOL -- Place out-of-band data in receive data stream.
2821 :priority INT -- Set protocol defined priority for sent packets.
2822 :reuseaddr BOOL -- Allow reusing a recently used local address
2823 (this is allowed by default for a server process).
2824 :bindtodevice NAME -- bind to interface NAME. Using this may require
2825 special privileges on some systems.
2827 Consult the relevant system programmer's manual pages for more
2828 information on using these options.
2831 A server process will listen for and accept connections from clients.
2832 When a client connection is accepted, a new network process is created
2833 for the connection with the following parameters:
2835 - The client's process name is constructed by concatenating the server
2836 process' NAME and a client identification string.
2837 - If the FILTER argument is non-nil, the client process will not get a
2838 separate process buffer; otherwise, the client's process buffer is a newly
2839 created buffer named after the server process' BUFFER name or process
2840 NAME concatenated with the client identification string.
2841 - The connection type and the process filter and sentinel parameters are
2842 inherited from the server process' TYPE, FILTER and SENTINEL.
2843 - The client process' contact info is set according to the client's
2844 addressing information (typically an IP address and a port number).
2845 - The client process' plist is initialized from the server's plist.
2847 Notice that the FILTER and SENTINEL args are never used directly by
2848 the server process. Also, the BUFFER argument is not used directly by
2849 the server process, but via the optional :log function, accepted (and
2850 failed) connections may be logged in the server process' buffer.
2852 The original argument list, modified with the actual connection
2853 information, is available via the `process-contact' function.
2855 usage: (make-network-process &rest ARGS) */)
2856 (ptrdiff_t nargs
, Lisp_Object
*args
)
2859 Lisp_Object contact
;
2860 struct Lisp_Process
*p
;
2861 #ifdef HAVE_GETADDRINFO
2862 struct addrinfo ai
, *res
, *lres
;
2863 struct addrinfo hints
;
2864 const char *portstring
;
2866 #else /* HAVE_GETADDRINFO */
2867 struct _emacs_addrinfo
2873 struct sockaddr
*ai_addr
;
2874 struct _emacs_addrinfo
*ai_next
;
2876 #endif /* HAVE_GETADDRINFO */
2877 struct sockaddr_in address_in
;
2878 #ifdef HAVE_LOCAL_SOCKETS
2879 struct sockaddr_un address_un
;
2884 int s
= -1, outch
, inch
;
2885 struct gcpro gcpro1
;
2886 ptrdiff_t count
= SPECPDL_INDEX ();
2888 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2890 Lisp_Object name
, buffer
, host
, service
, address
;
2891 Lisp_Object filter
, sentinel
;
2892 int is_non_blocking_client
= 0;
2893 int is_server
= 0, backlog
= 5;
2900 /* Save arguments for process-contact and clone-process. */
2901 contact
= Flist (nargs
, args
);
2905 /* Ensure socket support is loaded if available. */
2906 init_winsock (TRUE
);
2909 /* :type TYPE (nil: stream, datagram */
2910 tem
= Fplist_get (contact
, QCtype
);
2912 socktype
= SOCK_STREAM
;
2913 #ifdef DATAGRAM_SOCKETS
2914 else if (EQ (tem
, Qdatagram
))
2915 socktype
= SOCK_DGRAM
;
2917 #ifdef HAVE_SEQPACKET
2918 else if (EQ (tem
, Qseqpacket
))
2919 socktype
= SOCK_SEQPACKET
;
2922 error ("Unsupported connection type");
2925 tem
= Fplist_get (contact
, QCserver
);
2928 /* Don't support network sockets when non-blocking mode is
2929 not available, since a blocked Emacs is not useful. */
2930 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2931 error ("Network servers not supported");
2934 if (TYPE_RANGED_INTEGERP (int, tem
))
2935 backlog
= XINT (tem
);
2939 /* Make QCaddress an alias for :local (server) or :remote (client). */
2940 QCaddress
= is_server
? QClocal
: QCremote
;
2943 if (!is_server
&& socktype
!= SOCK_DGRAM
2944 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2946 #ifndef NON_BLOCKING_CONNECT
2947 error ("Non-blocking connect not supported");
2949 is_non_blocking_client
= 1;
2953 name
= Fplist_get (contact
, QCname
);
2954 buffer
= Fplist_get (contact
, QCbuffer
);
2955 filter
= Fplist_get (contact
, QCfilter
);
2956 sentinel
= Fplist_get (contact
, QCsentinel
);
2958 CHECK_STRING (name
);
2960 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2961 ai
.ai_socktype
= socktype
;
2966 /* :local ADDRESS or :remote ADDRESS */
2967 address
= Fplist_get (contact
, QCaddress
);
2968 if (!NILP (address
))
2970 host
= service
= Qnil
;
2972 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2973 error ("Malformed :address");
2974 ai
.ai_family
= family
;
2975 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2976 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2980 /* :family FAMILY -- nil (for Inet), local, or integer. */
2981 tem
= Fplist_get (contact
, QCfamily
);
2984 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2990 #ifdef HAVE_LOCAL_SOCKETS
2991 else if (EQ (tem
, Qlocal
))
2995 else if (EQ (tem
, Qipv6
))
2998 else if (EQ (tem
, Qipv4
))
3000 else if (TYPE_RANGED_INTEGERP (int, tem
))
3001 family
= XINT (tem
);
3003 error ("Unknown address family");
3005 ai
.ai_family
= family
;
3007 /* :service SERVICE -- string, integer (port number), or t (random port). */
3008 service
= Fplist_get (contact
, QCservice
);
3010 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3011 host
= Fplist_get (contact
, QChost
);
3014 if (EQ (host
, Qlocal
))
3015 /* Depending on setup, "localhost" may map to different IPv4 and/or
3016 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3017 host
= build_string ("127.0.0.1");
3018 CHECK_STRING (host
);
3021 #ifdef HAVE_LOCAL_SOCKETS
3022 if (family
== AF_LOCAL
)
3026 message (":family local ignores the :host \"%s\" property",
3028 contact
= Fplist_put (contact
, QChost
, Qnil
);
3031 CHECK_STRING (service
);
3032 memset (&address_un
, 0, sizeof address_un
);
3033 address_un
.sun_family
= AF_LOCAL
;
3034 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3035 error ("Service name too long");
3036 strcpy (address_un
.sun_path
, SSDATA (service
));
3037 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3038 ai
.ai_addrlen
= sizeof address_un
;
3043 /* Slow down polling to every ten seconds.
3044 Some kernels have a bug which causes retrying connect to fail
3045 after a connect. Polling can interfere with gethostbyname too. */
3046 #ifdef POLL_FOR_INPUT
3047 if (socktype
!= SOCK_DGRAM
)
3049 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3050 bind_polling_period (10);
3054 #ifdef HAVE_GETADDRINFO
3055 /* If we have a host, use getaddrinfo to resolve both host and service.
3056 Otherwise, use getservbyname to lookup the service. */
3060 /* SERVICE can either be a string or int.
3061 Convert to a C string for later use by getaddrinfo. */
3062 if (EQ (service
, Qt
))
3064 else if (INTEGERP (service
))
3066 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3067 portstring
= portbuf
;
3071 CHECK_STRING (service
);
3072 portstring
= SSDATA (service
);
3077 memset (&hints
, 0, sizeof (hints
));
3079 hints
.ai_family
= family
;
3080 hints
.ai_socktype
= socktype
;
3081 hints
.ai_protocol
= 0;
3083 #ifdef HAVE_RES_INIT
3087 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3089 #ifdef HAVE_GAI_STRERROR
3090 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3092 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3098 #endif /* HAVE_GETADDRINFO */
3100 /* We end up here if getaddrinfo is not defined, or in case no hostname
3101 has been specified (e.g. for a local server process). */
3103 if (EQ (service
, Qt
))
3105 else if (INTEGERP (service
))
3106 port
= htons ((unsigned short) XINT (service
));
3109 struct servent
*svc_info
;
3110 CHECK_STRING (service
);
3111 svc_info
= getservbyname (SSDATA (service
),
3112 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3114 error ("Unknown service: %s", SDATA (service
));
3115 port
= svc_info
->s_port
;
3118 memset (&address_in
, 0, sizeof address_in
);
3119 address_in
.sin_family
= family
;
3120 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3121 address_in
.sin_port
= port
;
3123 #ifndef HAVE_GETADDRINFO
3126 struct hostent
*host_info_ptr
;
3128 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3129 as it may `hang' Emacs for a very long time. */
3133 #ifdef HAVE_RES_INIT
3137 host_info_ptr
= gethostbyname (SDATA (host
));
3142 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3143 host_info_ptr
->h_length
);
3144 family
= host_info_ptr
->h_addrtype
;
3145 address_in
.sin_family
= family
;
3148 /* Attempt to interpret host as numeric inet address */
3150 unsigned long numeric_addr
;
3151 numeric_addr
= inet_addr (SSDATA (host
));
3152 if (numeric_addr
== -1)
3153 error ("Unknown host \"%s\"", SDATA (host
));
3155 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3156 sizeof (address_in
.sin_addr
));
3160 #endif /* not HAVE_GETADDRINFO */
3162 ai
.ai_family
= family
;
3163 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3164 ai
.ai_addrlen
= sizeof address_in
;
3168 /* Do this in case we never enter the for-loop below. */
3169 count1
= SPECPDL_INDEX ();
3172 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3181 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3188 #ifdef DATAGRAM_SOCKETS
3189 if (!is_server
&& socktype
== SOCK_DGRAM
)
3191 #endif /* DATAGRAM_SOCKETS */
3193 #ifdef NON_BLOCKING_CONNECT
3194 if (is_non_blocking_client
)
3197 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3199 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3211 /* Make us close S if quit. */
3212 record_unwind_protect (close_file_unwind
, make_number (s
));
3214 /* Parse network options in the arg list.
3215 We simply ignore anything which isn't a known option (including other keywords).
3216 An error is signaled if setting a known option fails. */
3217 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3218 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3222 /* Configure as a server socket. */
3224 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3225 explicit :reuseaddr key to override this. */
3226 #ifdef HAVE_LOCAL_SOCKETS
3227 if (family
!= AF_LOCAL
)
3229 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3232 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3233 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3236 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3237 report_file_error ("Cannot bind server socket", Qnil
);
3239 #ifdef HAVE_GETSOCKNAME
3240 if (EQ (service
, Qt
))
3242 struct sockaddr_in sa1
;
3243 socklen_t len1
= sizeof (sa1
);
3244 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3246 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3247 service
= make_number (ntohs (sa1
.sin_port
));
3248 contact
= Fplist_put (contact
, QCservice
, service
);
3253 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3254 report_file_error ("Cannot listen on server socket", Qnil
);
3262 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3265 if (ret
== 0 || xerrno
== EISCONN
)
3267 /* The unwind-protect will be discarded afterwards.
3268 Likewise for immediate_quit. */
3272 #ifdef NON_BLOCKING_CONNECT
3274 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3278 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3285 if (xerrno
== EINTR
)
3287 /* Unlike most other syscalls connect() cannot be called
3288 again. (That would return EALREADY.) The proper way to
3289 wait for completion is pselect(). */
3297 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3303 report_file_error ("select failed", Qnil
);
3307 len
= sizeof xerrno
;
3308 eassert (FD_ISSET (s
, &fdset
));
3309 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3310 report_file_error ("getsockopt failed", Qnil
);
3312 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3316 #endif /* !WINDOWSNT */
3320 /* Discard the unwind protect closing S. */
3321 specpdl_ptr
= specpdl
+ count1
;
3326 if (xerrno
== EINTR
)
3333 #ifdef DATAGRAM_SOCKETS
3334 if (socktype
== SOCK_DGRAM
)
3336 if (datagram_address
[s
].sa
)
3338 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3339 datagram_address
[s
].len
= lres
->ai_addrlen
;
3343 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3344 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3347 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3348 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3349 conv_lisp_to_sockaddr (rfamily
, remote
,
3350 datagram_address
[s
].sa
, rlen
);
3354 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3357 contact
= Fplist_put (contact
, QCaddress
,
3358 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3359 #ifdef HAVE_GETSOCKNAME
3362 struct sockaddr_in sa1
;
3363 socklen_t len1
= sizeof (sa1
);
3364 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3365 contact
= Fplist_put (contact
, QClocal
,
3366 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3373 #ifdef HAVE_GETADDRINFO
3382 /* Discard the unwind protect for closing S, if any. */
3383 specpdl_ptr
= specpdl
+ count1
;
3385 /* Unwind bind_polling_period and request_sigio. */
3386 unbind_to (count
, Qnil
);
3390 /* If non-blocking got this far - and failed - assume non-blocking is
3391 not supported after all. This is probably a wrong assumption, but
3392 the normal blocking calls to open-network-stream handles this error
3394 if (is_non_blocking_client
)
3399 report_file_error ("make server process failed", contact
);
3401 report_file_error ("make client process failed", contact
);
3408 buffer
= Fget_buffer_create (buffer
);
3409 proc
= make_process (name
);
3411 chan_process
[inch
] = proc
;
3414 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3417 fcntl (inch
, F_SETFL
, O_NDELAY
);
3421 p
= XPROCESS (proc
);
3423 pset_childp (p
, contact
);
3424 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3425 pset_type (p
, Qnetwork
);
3427 pset_buffer (p
, buffer
);
3428 pset_sentinel (p
, sentinel
);
3429 pset_filter (p
, filter
);
3430 pset_log (p
, Fplist_get (contact
, QClog
));
3431 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3432 p
->kill_without_query
= 1;
3433 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3434 pset_command (p
, Qt
);
3438 if (is_server
&& socktype
!= SOCK_DGRAM
)
3439 pset_status (p
, Qlisten
);
3441 /* Make the process marker point into the process buffer (if any). */
3442 if (BUFFERP (buffer
))
3443 set_marker_both (p
->mark
, buffer
,
3444 BUF_ZV (XBUFFER (buffer
)),
3445 BUF_ZV_BYTE (XBUFFER (buffer
)));
3447 #ifdef NON_BLOCKING_CONNECT
3448 if (is_non_blocking_client
)
3450 /* We may get here if connect did succeed immediately. However,
3451 in that case, we still need to signal this like a non-blocking
3453 pset_status (p
, Qconnect
);
3454 if (!FD_ISSET (inch
, &connect_wait_mask
))
3456 FD_SET (inch
, &connect_wait_mask
);
3457 FD_SET (inch
, &write_mask
);
3458 num_pending_connects
++;
3463 /* A server may have a client filter setting of Qt, but it must
3464 still listen for incoming connects unless it is stopped. */
3465 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3466 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3468 FD_SET (inch
, &input_wait_mask
);
3469 FD_SET (inch
, &non_keyboard_wait_mask
);
3472 if (inch
> max_process_desc
)
3473 max_process_desc
= inch
;
3475 tem
= Fplist_member (contact
, QCcoding
);
3476 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3477 tem
= Qnil
; /* No error message (too late!). */
3480 /* Setup coding systems for communicating with the network stream. */
3481 struct gcpro gcpro1
;
3482 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3483 Lisp_Object coding_systems
= Qt
;
3484 Lisp_Object fargs
[5], val
;
3488 val
= XCAR (XCDR (tem
));
3492 else if (!NILP (Vcoding_system_for_read
))
3493 val
= Vcoding_system_for_read
;
3494 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3495 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3496 /* We dare not decode end-of-line format by setting VAL to
3497 Qraw_text, because the existing Emacs Lisp libraries
3498 assume that they receive bare code including a sequence of
3503 if (NILP (host
) || NILP (service
))
3504 coding_systems
= Qnil
;
3507 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3508 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3510 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3513 if (CONSP (coding_systems
))
3514 val
= XCAR (coding_systems
);
3515 else if (CONSP (Vdefault_process_coding_system
))
3516 val
= XCAR (Vdefault_process_coding_system
);
3520 pset_decode_coding_system (p
, val
);
3524 val
= XCAR (XCDR (tem
));
3528 else if (!NILP (Vcoding_system_for_write
))
3529 val
= Vcoding_system_for_write
;
3530 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3534 if (EQ (coding_systems
, Qt
))
3536 if (NILP (host
) || NILP (service
))
3537 coding_systems
= Qnil
;
3540 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3541 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3543 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3547 if (CONSP (coding_systems
))
3548 val
= XCDR (coding_systems
);
3549 else if (CONSP (Vdefault_process_coding_system
))
3550 val
= XCDR (Vdefault_process_coding_system
);
3554 pset_encode_coding_system (p
, val
);
3556 setup_process_coding_systems (proc
);
3558 pset_decoding_buf (p
, empty_unibyte_string
);
3559 p
->decoding_carryover
= 0;
3560 pset_encoding_buf (p
, empty_unibyte_string
);
3562 p
->inherit_coding_system_flag
3563 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3570 #if defined (HAVE_NET_IF_H)
3573 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3574 doc
: /* Return an alist of all network interfaces and their network address.
3575 Each element is a cons, the car of which is a string containing the
3576 interface name, and the cdr is the network address in internal
3577 format; see the description of ADDRESS in `make-network-process'. */)
3580 struct ifconf ifconf
;
3581 struct ifreq
*ifreq
;
3583 ptrdiff_t buf_size
= 512;
3587 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3593 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3594 ifconf
.ifc_buf
= buf
;
3595 ifconf
.ifc_len
= buf_size
;
3596 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3603 while (ifconf
.ifc_len
== buf_size
);
3608 ifreq
= ifconf
.ifc_req
;
3609 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3611 struct ifreq
*ifq
= ifreq
;
3612 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3613 #define SIZEOF_IFREQ(sif) \
3614 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3615 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3617 int len
= SIZEOF_IFREQ (ifq
);
3619 int len
= sizeof (*ifreq
);
3621 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3623 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3625 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3628 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3629 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3630 res
= Fcons (Fcons (build_string (namebuf
),
3631 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3632 sizeof (struct sockaddr
))),
3639 #endif /* SIOCGIFCONF */
3641 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3645 const char *flag_sym
;
3648 static const struct ifflag_def ifflag_table
[] = {
3652 #ifdef IFF_BROADCAST
3653 { IFF_BROADCAST
, "broadcast" },
3656 { IFF_DEBUG
, "debug" },
3659 { IFF_LOOPBACK
, "loopback" },
3661 #ifdef IFF_POINTOPOINT
3662 { IFF_POINTOPOINT
, "pointopoint" },
3665 { IFF_RUNNING
, "running" },
3668 { IFF_NOARP
, "noarp" },
3671 { IFF_PROMISC
, "promisc" },
3673 #ifdef IFF_NOTRAILERS
3674 #ifdef NS_IMPL_COCOA
3675 /* Really means smart, notrailers is obsolete */
3676 { IFF_NOTRAILERS
, "smart" },
3678 { IFF_NOTRAILERS
, "notrailers" },
3682 { IFF_ALLMULTI
, "allmulti" },
3685 { IFF_MASTER
, "master" },
3688 { IFF_SLAVE
, "slave" },
3690 #ifdef IFF_MULTICAST
3691 { IFF_MULTICAST
, "multicast" },
3694 { IFF_PORTSEL
, "portsel" },
3696 #ifdef IFF_AUTOMEDIA
3697 { IFF_AUTOMEDIA
, "automedia" },
3700 { IFF_DYNAMIC
, "dynamic" },
3703 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3706 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3709 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3712 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3715 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3720 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3721 doc
: /* Return information about network interface named IFNAME.
3722 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3723 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3724 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3725 FLAGS is the current flags of the interface. */)
3726 (Lisp_Object ifname
)
3729 Lisp_Object res
= Qnil
;
3733 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3734 && defined HAVE_GETIFADDRS && defined LLADDR)
3735 struct ifaddrs
*ifap
;
3738 CHECK_STRING (ifname
);
3740 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3741 error ("interface name too long");
3742 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3744 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3749 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3750 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3752 int flags
= rq
.ifr_flags
;
3753 const struct ifflag_def
*fp
;
3756 /* If flags is smaller than int (i.e. short) it may have the high bit set
3757 due to IFF_MULTICAST. In that case, sign extending it into
3759 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3760 flags
= (unsigned short) rq
.ifr_flags
;
3763 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3765 if (flags
& fp
->flag_bit
)
3767 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3768 flags
-= fp
->flag_bit
;
3771 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3775 elt
= Fcons (make_number (fnum
), elt
);
3780 res
= Fcons (elt
, res
);
3783 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3784 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3786 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3787 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3791 for (n
= 0; n
< 6; n
++)
3792 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3793 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3795 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3796 if (getifaddrs (&ifap
) != -1)
3798 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3799 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3802 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3804 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3805 unsigned char linkaddr
[6];
3808 if (it
->ifa_addr
->sa_family
!= AF_LINK
3809 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3810 || sdl
->sdl_alen
!= 6)
3813 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3814 for (n
= 0; n
< 6; n
++)
3815 p
->contents
[n
] = make_number (linkaddr
[n
]);
3817 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3821 #ifdef HAVE_FREEIFADDRS
3825 #endif /* HAVE_GETIFADDRS && LLADDR */
3827 res
= Fcons (elt
, res
);
3830 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3831 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3834 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3835 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3837 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3841 res
= Fcons (elt
, res
);
3844 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3845 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3848 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3851 res
= Fcons (elt
, res
);
3854 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3855 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3858 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3861 res
= Fcons (elt
, res
);
3865 return any
? res
: Qnil
;
3868 #endif /* defined (HAVE_NET_IF_H) */
3870 /* Turn off input and output for process PROC. */
3873 deactivate_process (Lisp_Object proc
)
3875 register int inchannel
, outchannel
;
3876 register struct Lisp_Process
*p
= XPROCESS (proc
);
3879 /* Delete GnuTLS structures in PROC, if any. */
3880 emacs_gnutls_deinit (proc
);
3881 #endif /* HAVE_GNUTLS */
3883 inchannel
= p
->infd
;
3884 outchannel
= p
->outfd
;
3886 #ifdef ADAPTIVE_READ_BUFFERING
3887 if (p
->read_output_delay
> 0)
3889 if (--process_output_delay_count
< 0)
3890 process_output_delay_count
= 0;
3891 p
->read_output_delay
= 0;
3892 p
->read_output_skip
= 0;
3898 /* Beware SIGCHLD hereabouts. */
3899 flush_pending_output (inchannel
);
3900 emacs_close (inchannel
);
3901 if (outchannel
>= 0 && outchannel
!= inchannel
)
3902 emacs_close (outchannel
);
3906 #ifdef DATAGRAM_SOCKETS
3907 if (DATAGRAM_CHAN_P (inchannel
))
3909 xfree (datagram_address
[inchannel
].sa
);
3910 datagram_address
[inchannel
].sa
= 0;
3911 datagram_address
[inchannel
].len
= 0;
3914 chan_process
[inchannel
] = Qnil
;
3915 FD_CLR (inchannel
, &input_wait_mask
);
3916 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3917 #ifdef NON_BLOCKING_CONNECT
3918 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3920 FD_CLR (inchannel
, &connect_wait_mask
);
3921 FD_CLR (inchannel
, &write_mask
);
3922 if (--num_pending_connects
< 0)
3926 if (inchannel
== max_process_desc
)
3929 /* We just closed the highest-numbered process input descriptor,
3930 so recompute the highest-numbered one now. */
3931 max_process_desc
= 0;
3932 for (i
= 0; i
< MAXDESC
; i
++)
3933 if (!NILP (chan_process
[i
]))
3934 max_process_desc
= i
;
3940 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3942 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3943 It is read into the process' buffers or given to their filter functions.
3944 Non-nil arg PROCESS means do not return until some output has been received
3947 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3948 and milliseconds to wait; return after that much time whether or not
3949 there is any subprocess output. If SECONDS is a floating point number,
3950 it specifies a fractional number of seconds to wait.
3951 The MILLISEC argument is obsolete and should be avoided.
3953 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3954 from PROCESS, suspending reading output from other processes.
3955 If JUST-THIS-ONE is an integer, don't run any timers either.
3956 Return non-nil if we received any output before the timeout expired. */)
3957 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3962 if (! NILP (process
))
3963 CHECK_PROCESS (process
);
3965 just_this_one
= Qnil
;
3967 if (!NILP (millisec
))
3968 { /* Obsolete calling convention using integers rather than floats. */
3969 CHECK_NUMBER (millisec
);
3971 seconds
= make_float (XINT (millisec
) / 1000.0);
3974 CHECK_NUMBER (seconds
);
3975 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3982 if (!NILP (seconds
))
3984 if (INTEGERP (seconds
))
3986 if (0 < XINT (seconds
))
3988 secs
= XINT (seconds
);
3992 else if (FLOATP (seconds
))
3994 if (0 < XFLOAT_DATA (seconds
))
3996 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
3997 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
3998 nsecs
= EMACS_NSECS (t
);
4002 wrong_type_argument (Qnumberp
, seconds
);
4004 else if (! NILP (process
))
4008 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4010 !NILP (process
) ? XPROCESS (process
) : NULL
,
4011 NILP (just_this_one
) ? 0 :
4012 !INTEGERP (just_this_one
) ? 1 : -1)
4016 /* Accept a connection for server process SERVER on CHANNEL. */
4018 static int connect_counter
= 0;
4021 server_accept_connection (Lisp_Object server
, int channel
)
4023 Lisp_Object proc
, caller
, name
, buffer
;
4024 Lisp_Object contact
, host
, service
;
4025 struct Lisp_Process
*ps
= XPROCESS (server
);
4026 struct Lisp_Process
*p
;
4030 struct sockaddr_in in
;
4032 struct sockaddr_in6 in6
;
4034 #ifdef HAVE_LOCAL_SOCKETS
4035 struct sockaddr_un un
;
4038 socklen_t len
= sizeof saddr
;
4040 s
= accept (channel
, &saddr
.sa
, &len
);
4049 if (code
== EWOULDBLOCK
)
4053 if (!NILP (ps
->log
))
4054 call3 (ps
->log
, server
, Qnil
,
4055 concat3 (build_string ("accept failed with code"),
4056 Fnumber_to_string (make_number (code
)),
4057 build_string ("\n")));
4063 /* Setup a new process to handle the connection. */
4065 /* Generate a unique identification of the caller, and build contact
4066 information for this process. */
4069 switch (saddr
.sa
.sa_family
)
4073 Lisp_Object args
[5];
4074 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4075 args
[0] = build_string ("%d.%d.%d.%d");
4076 args
[1] = make_number (*ip
++);
4077 args
[2] = make_number (*ip
++);
4078 args
[3] = make_number (*ip
++);
4079 args
[4] = make_number (*ip
++);
4080 host
= Fformat (5, args
);
4081 service
= make_number (ntohs (saddr
.in
.sin_port
));
4083 args
[0] = build_string (" <%s:%d>");
4086 caller
= Fformat (3, args
);
4093 Lisp_Object args
[9];
4094 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4096 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4097 for (i
= 0; i
< 8; i
++)
4098 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4099 host
= Fformat (9, args
);
4100 service
= make_number (ntohs (saddr
.in
.sin_port
));
4102 args
[0] = build_string (" <[%s]:%d>");
4105 caller
= Fformat (3, args
);
4110 #ifdef HAVE_LOCAL_SOCKETS
4114 caller
= Fnumber_to_string (make_number (connect_counter
));
4115 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4119 /* Create a new buffer name for this process if it doesn't have a
4120 filter. The new buffer name is based on the buffer name or
4121 process name of the server process concatenated with the caller
4124 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4128 buffer
= ps
->buffer
;
4130 buffer
= Fbuffer_name (buffer
);
4135 buffer
= concat2 (buffer
, caller
);
4136 buffer
= Fget_buffer_create (buffer
);
4140 /* Generate a unique name for the new server process. Combine the
4141 server process name with the caller identification. */
4143 name
= concat2 (ps
->name
, caller
);
4144 proc
= make_process (name
);
4146 chan_process
[s
] = proc
;
4149 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4152 fcntl (s
, F_SETFL
, O_NDELAY
);
4156 p
= XPROCESS (proc
);
4158 /* Build new contact information for this setup. */
4159 contact
= Fcopy_sequence (ps
->childp
);
4160 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4161 contact
= Fplist_put (contact
, QChost
, host
);
4162 if (!NILP (service
))
4163 contact
= Fplist_put (contact
, QCservice
, service
);
4164 contact
= Fplist_put (contact
, QCremote
,
4165 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4166 #ifdef HAVE_GETSOCKNAME
4168 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4169 contact
= Fplist_put (contact
, QClocal
,
4170 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4173 pset_childp (p
, contact
);
4174 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4175 pset_type (p
, Qnetwork
);
4177 pset_buffer (p
, buffer
);
4178 pset_sentinel (p
, ps
->sentinel
);
4179 pset_filter (p
, ps
->filter
);
4180 pset_command (p
, Qnil
);
4184 pset_status (p
, Qrun
);
4186 /* Client processes for accepted connections are not stopped initially. */
4187 if (!EQ (p
->filter
, Qt
))
4189 FD_SET (s
, &input_wait_mask
);
4190 FD_SET (s
, &non_keyboard_wait_mask
);
4193 if (s
> max_process_desc
)
4194 max_process_desc
= s
;
4196 /* Setup coding system for new process based on server process.
4197 This seems to be the proper thing to do, as the coding system
4198 of the new process should reflect the settings at the time the
4199 server socket was opened; not the current settings. */
4201 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4202 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4203 setup_process_coding_systems (proc
);
4205 pset_decoding_buf (p
, empty_unibyte_string
);
4206 p
->decoding_carryover
= 0;
4207 pset_encoding_buf (p
, empty_unibyte_string
);
4209 p
->inherit_coding_system_flag
4210 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4212 if (!NILP (ps
->log
))
4213 call3 (ps
->log
, server
, proc
,
4214 concat3 (build_string ("accept from "),
4215 (STRINGP (host
) ? host
: build_string ("-")),
4216 build_string ("\n")));
4218 if (!NILP (p
->sentinel
))
4219 exec_sentinel (proc
,
4220 concat3 (build_string ("open from "),
4221 (STRINGP (host
) ? host
: build_string ("-")),
4222 build_string ("\n")));
4225 /* This variable is different from waiting_for_input in keyboard.c.
4226 It is used to communicate to a lisp process-filter/sentinel (via the
4227 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4228 for user-input when that process-filter was called.
4229 waiting_for_input cannot be used as that is by definition 0 when
4230 lisp code is being evalled.
4231 This is also used in record_asynch_buffer_change.
4232 For that purpose, this must be 0
4233 when not inside wait_reading_process_output. */
4234 static int waiting_for_user_input_p
;
4237 wait_reading_process_output_unwind (Lisp_Object data
)
4239 waiting_for_user_input_p
= XINT (data
);
4243 /* This is here so breakpoints can be put on it. */
4245 wait_reading_process_output_1 (void)
4249 /* Read and dispose of subprocess output while waiting for timeout to
4250 elapse and/or keyboard input to be available.
4254 If negative, gobble data immediately available but don't wait for any.
4257 an additional duration to wait, measured in nanoseconds
4258 If TIME_LIMIT is zero, then:
4259 If NSECS == 0, there is no limit.
4260 If NSECS > 0, the timeout consists of NSECS only.
4261 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4264 0 to ignore keyboard input, or
4265 1 to return when input is available, or
4266 -1 meaning caller will actually read the input, so don't throw to
4267 the quit handler, or
4269 DO_DISPLAY means redisplay should be done to show subprocess
4270 output that arrives.
4272 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4273 (and gobble terminal input into the buffer if any arrives).
4275 If WAIT_PROC is specified, wait until something arrives from that
4276 process. The return value is true if we read some input from
4279 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4280 (suspending output from other processes). A negative value
4281 means don't run any timers either.
4283 If WAIT_PROC is specified, then the function returns true if we
4284 received input from that process before the timeout elapsed.
4285 Otherwise, return true if we received input from any process. */
4288 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4290 Lisp_Object wait_for_cell
,
4291 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4293 register int channel
, nfds
;
4294 SELECT_TYPE Available
;
4295 SELECT_TYPE Writeok
;
4297 int check_delay
, no_avail
;
4300 EMACS_TIME timeout
, end_time
;
4301 int wait_channel
= -1;
4302 int got_some_input
= 0;
4303 ptrdiff_t count
= SPECPDL_INDEX ();
4305 FD_ZERO (&Available
);
4308 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4309 && !(CONSP (wait_proc
->status
)
4310 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4311 message ("Blocking call to accept-process-output with quit inhibited!!");
4313 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4314 if (wait_proc
!= NULL
)
4315 wait_channel
= wait_proc
->infd
;
4317 record_unwind_protect (wait_reading_process_output_unwind
,
4318 make_number (waiting_for_user_input_p
));
4319 waiting_for_user_input_p
= read_kbd
;
4326 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4327 time_limit
= TYPE_MAXIMUM (time_t);
4329 /* Since we may need to wait several times,
4330 compute the absolute time to return at. */
4331 if (time_limit
|| 0 < nsecs
)
4333 timeout
= make_emacs_time (time_limit
, nsecs
);
4334 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4339 /* If calling from keyboard input, do not quit
4340 since we want to return C-g as an input character.
4341 Otherwise, do pending quit if requested. */
4344 else if (pending_signals
)
4345 process_pending_signals ();
4347 /* Exit now if the cell we're waiting for became non-nil. */
4348 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4351 /* Compute time from now till when time limit is up */
4352 /* Exit if already run out */
4355 /* A negative timeout means
4356 gobble output available now
4357 but don't wait at all. */
4359 timeout
= make_emacs_time (0, 0);
4361 else if (time_limit
|| 0 < nsecs
)
4363 EMACS_TIME now
= current_emacs_time ();
4364 if (EMACS_TIME_LE (end_time
, now
))
4366 timeout
= sub_emacs_time (end_time
, now
);
4370 timeout
= make_emacs_time (100000, 0);
4373 /* Normally we run timers here.
4374 But not if wait_for_cell; in those cases,
4375 the wait is supposed to be short,
4376 and those callers cannot handle running arbitrary Lisp code here. */
4377 if (NILP (wait_for_cell
)
4378 && just_wait_proc
>= 0)
4380 EMACS_TIME timer_delay
;
4384 unsigned old_timers_run
= timers_run
;
4385 struct buffer
*old_buffer
= current_buffer
;
4386 Lisp_Object old_window
= selected_window
;
4388 timer_delay
= timer_check ();
4390 /* If a timer has run, this might have changed buffers
4391 an alike. Make read_key_sequence aware of that. */
4392 if (timers_run
!= old_timers_run
4393 && (old_buffer
!= current_buffer
4394 || !EQ (old_window
, selected_window
))
4395 && waiting_for_user_input_p
== -1)
4396 record_asynch_buffer_change ();
4398 if (timers_run
!= old_timers_run
&& do_display
)
4399 /* We must retry, since a timer may have requeued itself
4400 and that could alter the time_delay. */
4401 redisplay_preserve_echo_area (9);
4405 while (!detect_input_pending ());
4407 /* If there is unread keyboard input, also return. */
4409 && requeued_events_pending_p ())
4412 /* A negative timeout means do not wait at all. */
4415 if (EMACS_TIME_VALID_P (timer_delay
))
4417 if (EMACS_TIME_LT (timer_delay
, timeout
))
4418 timeout
= timer_delay
;
4422 /* This is so a breakpoint can be put here. */
4423 wait_reading_process_output_1 ();
4428 /* Cause C-g and alarm signals to take immediate action,
4429 and cause input available signals to zero out timeout.
4431 It is important that we do this before checking for process
4432 activity. If we get a SIGCHLD after the explicit checks for
4433 process activity, timeout is the only way we will know. */
4435 set_waiting_for_input (&timeout
);
4437 /* If status of something has changed, and no input is
4438 available, notify the user of the change right away. After
4439 this explicit check, we'll let the SIGCHLD handler zap
4440 timeout to get our attention. */
4441 if (update_tick
!= process_tick
)
4446 if (kbd_on_hold_p ())
4449 Atemp
= input_wait_mask
;
4452 timeout
= make_emacs_time (0, 0);
4453 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4455 #ifdef NON_BLOCKING_CONNECT
4456 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4460 NULL
, &timeout
, NULL
)
4463 /* It's okay for us to do this and then continue with
4464 the loop, since timeout has already been zeroed out. */
4465 clear_waiting_for_input ();
4466 status_notify (NULL
);
4467 if (do_display
) redisplay_preserve_echo_area (13);
4471 /* Don't wait for output from a non-running process. Just
4472 read whatever data has already been received. */
4473 if (wait_proc
&& wait_proc
->raw_status_new
)
4474 update_status (wait_proc
);
4476 && ! EQ (wait_proc
->status
, Qrun
)
4477 && ! EQ (wait_proc
->status
, Qconnect
))
4479 int nread
, total_nread
= 0;
4481 clear_waiting_for_input ();
4482 XSETPROCESS (proc
, wait_proc
);
4484 /* Read data from the process, until we exhaust it. */
4485 while (wait_proc
->infd
>= 0)
4487 nread
= read_process_output (proc
, wait_proc
->infd
);
4494 total_nread
+= nread
;
4498 else if (nread
== -1 && EIO
== errno
)
4502 else if (nread
== -1 && EAGAIN
== errno
)
4506 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4510 if (total_nread
> 0 && do_display
)
4511 redisplay_preserve_echo_area (10);
4516 /* Wait till there is something to do */
4518 if (wait_proc
&& just_wait_proc
)
4520 if (wait_proc
->infd
< 0) /* Terminated */
4522 FD_SET (wait_proc
->infd
, &Available
);
4526 else if (!NILP (wait_for_cell
))
4528 Available
= non_process_wait_mask
;
4535 Available
= non_keyboard_wait_mask
;
4537 Available
= input_wait_mask
;
4538 Writeok
= write_mask
;
4539 #ifdef SELECT_CANT_DO_WRITE_MASK
4544 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4547 /* If frame size has changed or the window is newly mapped,
4548 redisplay now, before we start to wait. There is a race
4549 condition here; if a SIGIO arrives between now and the select
4550 and indicates that a frame is trashed, the select may block
4551 displaying a trashed screen. */
4552 if (frame_garbaged
&& do_display
)
4554 clear_waiting_for_input ();
4555 redisplay_preserve_echo_area (11);
4557 set_waiting_for_input (&timeout
);
4560 /* Skip the `select' call if input is available and we're
4561 waiting for keyboard input or a cell change (which can be
4562 triggered by processing X events). In the latter case, set
4563 nfds to 1 to avoid breaking the loop. */
4565 if ((read_kbd
|| !NILP (wait_for_cell
))
4566 && detect_input_pending ())
4568 nfds
= read_kbd
? 0 : 1;
4575 #ifdef ADAPTIVE_READ_BUFFERING
4576 /* Set the timeout for adaptive read buffering if any
4577 process has non-zero read_output_skip and non-zero
4578 read_output_delay, and we are not reading output for a
4579 specific wait_channel. It is not executed if
4580 Vprocess_adaptive_read_buffering is nil. */
4581 if (process_output_skip
&& check_delay
> 0)
4583 int nsecs
= EMACS_NSECS (timeout
);
4584 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4585 nsecs
= READ_OUTPUT_DELAY_MAX
;
4586 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4588 proc
= chan_process
[channel
];
4591 /* Find minimum non-zero read_output_delay among the
4592 processes with non-zero read_output_skip. */
4593 if (XPROCESS (proc
)->read_output_delay
> 0)
4596 if (!XPROCESS (proc
)->read_output_skip
)
4598 FD_CLR (channel
, &Available
);
4599 XPROCESS (proc
)->read_output_skip
= 0;
4600 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4601 nsecs
= XPROCESS (proc
)->read_output_delay
;
4604 timeout
= make_emacs_time (0, nsecs
);
4605 process_output_skip
= 0;
4609 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4611 #elif defined (HAVE_NS)
4616 (max (max_process_desc
, max_input_desc
) + 1,
4618 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4619 NULL
, &timeout
, NULL
);
4622 /* GnuTLS buffers data internally. In lowat mode it leaves
4623 some data in the TCP buffers so that select works, but
4624 with custom pull/push functions we need to check if some
4625 data is available in the buffers manually. */
4630 /* We're not waiting on a specific process, so loop
4631 through all the channels and check for data.
4632 This is a workaround needed for some versions of
4633 the gnutls library -- 2.12.14 has been confirmed
4635 http://comments.gmane.org/gmane.emacs.devel/145074 */
4636 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4637 if (! NILP (chan_process
[channel
]))
4639 struct Lisp_Process
*p
=
4640 XPROCESS (chan_process
[channel
]);
4641 if (p
&& p
->gnutls_p
&& p
->infd
4642 && ((emacs_gnutls_record_check_pending
4647 FD_SET (p
->infd
, &Available
);
4653 /* Check this specific channel. */
4654 if (wait_proc
->gnutls_p
/* Check for valid process. */
4655 /* Do we have pending data? */
4656 && ((emacs_gnutls_record_check_pending
4657 (wait_proc
->gnutls_state
))
4661 /* Set to Available. */
4662 FD_SET (wait_proc
->infd
, &Available
);
4671 /* Make C-g and alarm signals set flags again */
4672 clear_waiting_for_input ();
4674 /* If we woke up due to SIGWINCH, actually change size now. */
4675 do_pending_window_change (0);
4677 /* We used to break here if nfds == 0, i.e. we seemed to have
4678 waited the full period. But apparently if Emacs receives
4679 SIGIO between set_waiting_for_input and select, select can
4680 return with nfds == 0 due to the timeout being zeroed out by
4681 the signal handler (Bug#11536). */
4685 if (xerrno
== EINTR
)
4687 else if (xerrno
== EBADF
)
4690 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4691 the child's closure of the pts gives the parent a SIGHUP, and
4692 the ptc file descriptor is automatically closed,
4693 yielding EBADF here or at select() call above.
4694 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4695 in m/ibmrt-aix.h), and here we just ignore the select error.
4696 Cleanup occurs c/o status_notify after SIGCLD. */
4697 no_avail
= 1; /* Cannot depend on values returned */
4703 error ("select error: %s", emacs_strerror (xerrno
));
4708 FD_ZERO (&Available
);
4712 /* Check for keyboard input */
4713 /* If there is any, return immediately
4714 to give it higher priority than subprocesses */
4718 unsigned old_timers_run
= timers_run
;
4719 struct buffer
*old_buffer
= current_buffer
;
4720 Lisp_Object old_window
= selected_window
;
4723 if (detect_input_pending_run_timers (do_display
))
4725 swallow_events (do_display
);
4726 if (detect_input_pending_run_timers (do_display
))
4730 /* If a timer has run, this might have changed buffers
4731 an alike. Make read_key_sequence aware of that. */
4732 if (timers_run
!= old_timers_run
4733 && waiting_for_user_input_p
== -1
4734 && (old_buffer
!= current_buffer
4735 || !EQ (old_window
, selected_window
)))
4736 record_asynch_buffer_change ();
4742 /* If there is unread keyboard input, also return. */
4744 && requeued_events_pending_p ())
4747 /* If we are not checking for keyboard input now,
4748 do process events (but don't run any timers).
4749 This is so that X events will be processed.
4750 Otherwise they may have to wait until polling takes place.
4751 That would causes delays in pasting selections, for example.
4753 (We used to do this only if wait_for_cell.) */
4754 if (read_kbd
== 0 && detect_input_pending ())
4756 swallow_events (do_display
);
4757 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4758 if (detect_input_pending ())
4763 /* Exit now if the cell we're waiting for became non-nil. */
4764 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4768 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4769 go read it. This can happen with X on BSD after logging out.
4770 In that case, there really is no input and no SIGIO,
4771 but select says there is input. */
4773 if (read_kbd
&& interrupt_input
4774 && keyboard_bit_set (&Available
) && ! noninteractive
)
4775 handle_input_available_signal (SIGIO
);
4779 got_some_input
|= nfds
> 0;
4781 /* If checking input just got us a size-change event from X,
4782 obey it now if we should. */
4783 if (read_kbd
|| ! NILP (wait_for_cell
))
4784 do_pending_window_change (0);
4786 /* Check for data from a process. */
4787 if (no_avail
|| nfds
== 0)
4790 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4792 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4794 && ((d
->condition
& FOR_READ
4795 && FD_ISSET (channel
, &Available
))
4796 || (d
->condition
& FOR_WRITE
4797 && FD_ISSET (channel
, &write_mask
))))
4798 d
->func (channel
, d
->data
);
4801 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4803 if (FD_ISSET (channel
, &Available
)
4804 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4805 && !FD_ISSET (channel
, &non_process_wait_mask
))
4809 /* If waiting for this channel, arrange to return as
4810 soon as no more input to be processed. No more
4812 if (wait_channel
== channel
)
4818 proc
= chan_process
[channel
];
4822 /* If this is a server stream socket, accept connection. */
4823 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4825 server_accept_connection (proc
, channel
);
4829 /* Read data from the process, starting with our
4830 buffered-ahead character if we have one. */
4832 nread
= read_process_output (proc
, channel
);
4835 /* Since read_process_output can run a filter,
4836 which can call accept-process-output,
4837 don't try to read from any other processes
4838 before doing the select again. */
4839 FD_ZERO (&Available
);
4842 redisplay_preserve_echo_area (12);
4845 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4848 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4849 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4851 else if (nread
== -1 && errno
== EAGAIN
)
4855 else if (nread
== -1 && errno
== EAGAIN
)
4857 /* Note that we cannot distinguish between no input
4858 available now and a closed pipe.
4859 With luck, a closed pipe will be accompanied by
4860 subprocess termination and SIGCHLD. */
4861 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4863 #endif /* O_NDELAY */
4864 #endif /* O_NONBLOCK */
4866 /* On some OSs with ptys, when the process on one end of
4867 a pty exits, the other end gets an error reading with
4868 errno = EIO instead of getting an EOF (0 bytes read).
4869 Therefore, if we get an error reading and errno =
4870 EIO, just continue, because the child process has
4871 exited and should clean itself up soon (e.g. when we
4874 However, it has been known to happen that the SIGCHLD
4875 got lost. So raise the signal again just in case.
4877 else if (nread
== -1 && errno
== EIO
)
4879 struct Lisp_Process
*p
= XPROCESS (proc
);
4881 /* Clear the descriptor now, so we only raise the
4883 FD_CLR (channel
, &input_wait_mask
);
4884 FD_CLR (channel
, &non_keyboard_wait_mask
);
4888 /* If the EIO occurs on a pty, the SIGCHLD handler's
4889 waitpid call will not find the process object to
4890 delete. Do it here. */
4891 p
->tick
= ++process_tick
;
4892 pset_status (p
, Qfailed
);
4895 handle_child_signal (SIGCHLD
);
4897 #endif /* HAVE_PTYS */
4898 /* If we can detect process termination, don't consider the
4899 process gone just because its pipe is closed. */
4901 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4906 /* Preserve status of processes already terminated. */
4907 XPROCESS (proc
)->tick
= ++process_tick
;
4908 deactivate_process (proc
);
4909 if (XPROCESS (proc
)->raw_status_new
)
4910 update_status (XPROCESS (proc
));
4911 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4912 pset_status (XPROCESS (proc
),
4913 list2 (Qexit
, make_number (256)));
4916 #ifdef NON_BLOCKING_CONNECT
4917 if (FD_ISSET (channel
, &Writeok
)
4918 && FD_ISSET (channel
, &connect_wait_mask
))
4920 struct Lisp_Process
*p
;
4922 FD_CLR (channel
, &connect_wait_mask
);
4923 FD_CLR (channel
, &write_mask
);
4924 if (--num_pending_connects
< 0)
4927 proc
= chan_process
[channel
];
4931 p
= XPROCESS (proc
);
4934 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4935 So only use it on systems where it is known to work. */
4937 socklen_t xlen
= sizeof (xerrno
);
4938 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4943 struct sockaddr pname
;
4944 int pnamelen
= sizeof (pname
);
4946 /* If connection failed, getpeername will fail. */
4948 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4950 /* Obtain connect failure code through error slippage. */
4953 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4960 p
->tick
= ++process_tick
;
4961 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
4962 deactivate_process (proc
);
4966 pset_status (p
, Qrun
);
4967 /* Execute the sentinel here. If we had relied on
4968 status_notify to do it later, it will read input
4969 from the process before calling the sentinel. */
4970 exec_sentinel (proc
, build_string ("open\n"));
4971 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4973 FD_SET (p
->infd
, &input_wait_mask
);
4974 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4978 #endif /* NON_BLOCKING_CONNECT */
4979 } /* end for each file descriptor */
4980 } /* end while exit conditions not met */
4982 unbind_to (count
, Qnil
);
4984 /* If calling from keyboard input, do not quit
4985 since we want to return C-g as an input character.
4986 Otherwise, do pending quit if requested. */
4989 /* Prevent input_pending from remaining set if we quit. */
4990 clear_input_pending ();
4994 return got_some_input
;
4997 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5000 read_process_output_call (Lisp_Object fun_and_args
)
5002 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5006 read_process_output_error_handler (Lisp_Object error_val
)
5008 cmd_error_internal (error_val
, "error in process filter: ");
5010 update_echo_area ();
5011 Fsleep_for (make_number (2), Qnil
);
5015 /* Read pending output from the process channel,
5016 starting with our buffered-ahead character if we have one.
5017 Yield number of decoded characters read.
5019 This function reads at most 4096 characters.
5020 If you want to read all available subprocess output,
5021 you must call it repeatedly until it returns zero.
5023 The characters read are decoded according to PROC's coding-system
5027 read_process_output (Lisp_Object proc
, register int channel
)
5029 register ssize_t nbytes
;
5031 register Lisp_Object outstream
;
5032 register struct Lisp_Process
*p
= XPROCESS (proc
);
5033 register ptrdiff_t opoint
;
5034 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5035 int carryover
= p
->decoding_carryover
;
5037 ptrdiff_t count
= SPECPDL_INDEX ();
5038 Lisp_Object odeactivate
;
5040 chars
= alloca (carryover
+ readmax
);
5042 /* See the comment above. */
5043 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5045 #ifdef DATAGRAM_SOCKETS
5046 /* We have a working select, so proc_buffered_char is always -1. */
5047 if (DATAGRAM_CHAN_P (channel
))
5049 socklen_t len
= datagram_address
[channel
].len
;
5050 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5051 0, datagram_address
[channel
].sa
, &len
);
5056 int buffered
= 0 <= proc_buffered_char
[channel
];
5059 chars
[carryover
] = proc_buffered_char
[channel
];
5060 proc_buffered_char
[channel
] = -1;
5064 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5065 readmax
- buffered
);
5068 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5069 readmax
- buffered
);
5070 #ifdef ADAPTIVE_READ_BUFFERING
5071 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5073 int delay
= p
->read_output_delay
;
5076 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5079 process_output_delay_count
++;
5080 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5083 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5085 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5087 process_output_delay_count
--;
5089 p
->read_output_delay
= delay
;
5092 p
->read_output_skip
= 1;
5093 process_output_skip
= 1;
5098 nbytes
+= buffered
&& nbytes
<= 0;
5101 p
->decoding_carryover
= 0;
5103 /* At this point, NBYTES holds number of bytes just received
5104 (including the one in proc_buffered_char[channel]). */
5107 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5109 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5112 /* Now set NBYTES how many bytes we must decode. */
5113 nbytes
+= carryover
;
5115 odeactivate
= Vdeactivate_mark
;
5116 /* There's no good reason to let process filters change the current
5117 buffer, and many callers of accept-process-output, sit-for, and
5118 friends don't expect current-buffer to be changed from under them. */
5119 record_unwind_current_buffer ();
5121 /* Read and dispose of the process output. */
5122 outstream
= p
->filter
;
5123 if (!NILP (outstream
))
5126 bool outer_running_asynch_code
= running_asynch_code
;
5127 int waiting
= waiting_for_user_input_p
;
5129 /* No need to gcpro these, because all we do with them later
5130 is test them for EQness, and none of them should be a string. */
5132 Lisp_Object obuffer
, okeymap
;
5133 XSETBUFFER (obuffer
, current_buffer
);
5134 okeymap
= BVAR (current_buffer
, keymap
);
5137 /* We inhibit quit here instead of just catching it so that
5138 hitting ^G when a filter happens to be running won't screw
5140 specbind (Qinhibit_quit
, Qt
);
5141 specbind (Qlast_nonmenu_event
, Qt
);
5143 /* In case we get recursively called,
5144 and we already saved the match data nonrecursively,
5145 save the same match data in safely recursive fashion. */
5146 if (outer_running_asynch_code
)
5149 /* Don't clobber the CURRENT match data, either! */
5150 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5151 restore_search_regs ();
5152 record_unwind_save_match_data ();
5153 Fset_match_data (tem
, Qt
);
5156 /* For speed, if a search happens within this code,
5157 save the match data in a special nonrecursive fashion. */
5158 running_asynch_code
= 1;
5160 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5161 text
= coding
->dst_object
;
5162 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5163 /* A new coding system might be found. */
5164 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5166 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5168 /* Don't call setup_coding_system for
5169 proc_decode_coding_system[channel] here. It is done in
5170 detect_coding called via decode_coding above. */
5172 /* If a coding system for encoding is not yet decided, we set
5173 it as the same as coding-system for decoding.
5175 But, before doing that we must check if
5176 proc_encode_coding_system[p->outfd] surely points to a
5177 valid memory because p->outfd will be changed once EOF is
5178 sent to the process. */
5179 if (NILP (p
->encode_coding_system
)
5180 && proc_encode_coding_system
[p
->outfd
])
5182 pset_encode_coding_system
5183 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5184 setup_coding_system (p
->encode_coding_system
,
5185 proc_encode_coding_system
[p
->outfd
]);
5189 if (coding
->carryover_bytes
> 0)
5191 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5192 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5193 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5194 coding
->carryover_bytes
);
5195 p
->decoding_carryover
= coding
->carryover_bytes
;
5197 if (SBYTES (text
) > 0)
5198 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5199 sometimes it's simply wrong to wrap (e.g. when called from
5200 accept-process-output). */
5201 internal_condition_case_1 (read_process_output_call
,
5203 Fcons (proc
, Fcons (text
, Qnil
))),
5204 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5205 read_process_output_error_handler
);
5207 /* If we saved the match data nonrecursively, restore it now. */
5208 restore_search_regs ();
5209 running_asynch_code
= outer_running_asynch_code
;
5211 /* Restore waiting_for_user_input_p as it was
5212 when we were called, in case the filter clobbered it. */
5213 waiting_for_user_input_p
= waiting
;
5215 #if 0 /* Call record_asynch_buffer_change unconditionally,
5216 because we might have changed minor modes or other things
5217 that affect key bindings. */
5218 if (! EQ (Fcurrent_buffer (), obuffer
)
5219 || ! EQ (current_buffer
->keymap
, okeymap
))
5221 /* But do it only if the caller is actually going to read events.
5222 Otherwise there's no need to make him wake up, and it could
5223 cause trouble (for example it would make sit_for return). */
5224 if (waiting_for_user_input_p
== -1)
5225 record_asynch_buffer_change ();
5228 /* If no filter, write into buffer if it isn't dead. */
5229 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5231 Lisp_Object old_read_only
;
5232 ptrdiff_t old_begv
, old_zv
;
5233 ptrdiff_t old_begv_byte
, old_zv_byte
;
5234 ptrdiff_t before
, before_byte
;
5235 ptrdiff_t opoint_byte
;
5239 Fset_buffer (p
->buffer
);
5241 opoint_byte
= PT_BYTE
;
5242 old_read_only
= BVAR (current_buffer
, read_only
);
5245 old_begv_byte
= BEGV_BYTE
;
5246 old_zv_byte
= ZV_BYTE
;
5248 bset_read_only (current_buffer
, Qnil
);
5250 /* Insert new output into buffer
5251 at the current end-of-output marker,
5252 thus preserving logical ordering of input and output. */
5253 if (XMARKER (p
->mark
)->buffer
)
5254 SET_PT_BOTH (clip_to_bounds (BEGV
,
5255 marker_position (p
->mark
), ZV
),
5256 clip_to_bounds (BEGV_BYTE
,
5257 marker_byte_position (p
->mark
),
5260 SET_PT_BOTH (ZV
, ZV_BYTE
);
5262 before_byte
= PT_BYTE
;
5264 /* If the output marker is outside of the visible region, save
5265 the restriction and widen. */
5266 if (! (BEGV
<= PT
&& PT
<= ZV
))
5269 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5270 text
= coding
->dst_object
;
5271 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5272 /* A new coding system might be found. See the comment in the
5273 similar code in the previous `if' block. */
5274 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5276 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5277 if (NILP (p
->encode_coding_system
)
5278 && proc_encode_coding_system
[p
->outfd
])
5280 pset_encode_coding_system
5281 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5282 setup_coding_system (p
->encode_coding_system
,
5283 proc_encode_coding_system
[p
->outfd
]);
5286 if (coding
->carryover_bytes
> 0)
5288 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5289 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5290 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5291 coding
->carryover_bytes
);
5292 p
->decoding_carryover
= coding
->carryover_bytes
;
5294 /* Adjust the multibyteness of TEXT to that of the buffer. */
5295 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5296 != ! STRING_MULTIBYTE (text
))
5297 text
= (STRING_MULTIBYTE (text
)
5298 ? Fstring_as_unibyte (text
)
5299 : Fstring_to_multibyte (text
));
5300 /* Insert before markers in case we are inserting where
5301 the buffer's mark is, and the user's next command is Meta-y. */
5302 insert_from_string_before_markers (text
, 0, 0,
5303 SCHARS (text
), SBYTES (text
), 0);
5305 /* Make sure the process marker's position is valid when the
5306 process buffer is changed in the signal_after_change above.
5307 W3 is known to do that. */
5308 if (BUFFERP (p
->buffer
)
5309 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5310 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5312 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5314 update_mode_lines
++;
5316 /* Make sure opoint and the old restrictions
5317 float ahead of any new text just as point would. */
5318 if (opoint
>= before
)
5320 opoint
+= PT
- before
;
5321 opoint_byte
+= PT_BYTE
- before_byte
;
5323 if (old_begv
> before
)
5325 old_begv
+= PT
- before
;
5326 old_begv_byte
+= PT_BYTE
- before_byte
;
5328 if (old_zv
>= before
)
5330 old_zv
+= PT
- before
;
5331 old_zv_byte
+= PT_BYTE
- before_byte
;
5334 /* If the restriction isn't what it should be, set it. */
5335 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5336 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5339 bset_read_only (current_buffer
, old_read_only
);
5340 SET_PT_BOTH (opoint
, opoint_byte
);
5342 /* Handling the process output should not deactivate the mark. */
5343 Vdeactivate_mark
= odeactivate
;
5345 unbind_to (count
, Qnil
);
5349 /* Sending data to subprocess */
5351 /* In send_process, when a write fails temporarily,
5352 wait_reading_process_output is called. It may execute user code,
5353 e.g. timers, that attempts to write new data to the same process.
5354 We must ensure that data is sent in the right order, and not
5355 interspersed half-completed with other writes (Bug#10815). This is
5356 handled by the write_queue element of struct process. It is a list
5357 with each entry having the form
5359 (string . (offset . length))
5361 where STRING is a lisp string, OFFSET is the offset into the
5362 string's byte sequence from which we should begin to send, and
5363 LENGTH is the number of bytes left to send. */
5365 /* Create a new entry in write_queue.
5366 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5367 BUF is a pointer to the string sequence of the input_obj or a C
5368 string in case of Qt or Qnil. */
5371 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5372 const char *buf
, ptrdiff_t len
, int front
)
5375 Lisp_Object entry
, obj
;
5377 if (STRINGP (input_obj
))
5379 offset
= buf
- SSDATA (input_obj
);
5385 obj
= make_unibyte_string (buf
, len
);
5388 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5391 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5393 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5396 /* Remove the first element in the write_queue of process P, put its
5397 contents in OBJ, BUF and LEN, and return non-zero. If the
5398 write_queue is empty, return zero. */
5401 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5402 const char **buf
, ptrdiff_t *len
)
5404 Lisp_Object entry
, offset_length
;
5407 if (NILP (p
->write_queue
))
5410 entry
= XCAR (p
->write_queue
);
5411 pset_write_queue (p
, XCDR (p
->write_queue
));
5413 *obj
= XCAR (entry
);
5414 offset_length
= XCDR (entry
);
5416 *len
= XINT (XCDR (offset_length
));
5417 offset
= XINT (XCAR (offset_length
));
5418 *buf
= SSDATA (*obj
) + offset
;
5423 /* Send some data to process PROC.
5424 BUF is the beginning of the data; LEN is the number of characters.
5425 OBJECT is the Lisp object that the data comes from. If OBJECT is
5426 nil or t, it means that the data comes from C string.
5428 If OBJECT is not nil, the data is encoded by PROC's coding-system
5429 for encoding before it is sent.
5431 This function can evaluate Lisp code and can garbage collect. */
5434 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5437 struct Lisp_Process
*p
= XPROCESS (proc
);
5439 struct coding_system
*coding
;
5441 if (p
->raw_status_new
)
5443 if (! EQ (p
->status
, Qrun
))
5444 error ("Process %s not running", SDATA (p
->name
));
5446 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5448 coding
= proc_encode_coding_system
[p
->outfd
];
5449 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5451 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5452 || (BUFFERP (object
)
5453 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5456 pset_encode_coding_system
5457 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5458 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5460 /* The coding system for encoding was changed to raw-text
5461 because we sent a unibyte text previously. Now we are
5462 sending a multibyte text, thus we must encode it by the
5463 original coding system specified for the current process.
5465 Another reason we come here is that the coding system
5466 was just complemented and a new one was returned by
5467 complement_process_encoding_system. */
5468 setup_coding_system (p
->encode_coding_system
, coding
);
5469 Vlast_coding_system_used
= p
->encode_coding_system
;
5471 coding
->src_multibyte
= 1;
5475 coding
->src_multibyte
= 0;
5476 /* For sending a unibyte text, character code conversion should
5477 not take place but EOL conversion should. So, setup raw-text
5478 or one of the subsidiary if we have not yet done it. */
5479 if (CODING_REQUIRE_ENCODING (coding
))
5481 if (CODING_REQUIRE_FLUSHING (coding
))
5483 /* But, before changing the coding, we must flush out data. */
5484 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5485 send_process (proc
, "", 0, Qt
);
5486 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5488 setup_coding_system (raw_text_coding_system
5489 (Vlast_coding_system_used
),
5491 coding
->src_multibyte
= 0;
5494 coding
->dst_multibyte
= 0;
5496 if (CODING_REQUIRE_ENCODING (coding
))
5498 coding
->dst_object
= Qt
;
5499 if (BUFFERP (object
))
5501 ptrdiff_t from_byte
, from
, to
;
5502 ptrdiff_t save_pt
, save_pt_byte
;
5503 struct buffer
*cur
= current_buffer
;
5505 set_buffer_internal (XBUFFER (object
));
5506 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5508 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5509 from
= BYTE_TO_CHAR (from_byte
);
5510 to
= BYTE_TO_CHAR (from_byte
+ len
);
5511 TEMP_SET_PT_BOTH (from
, from_byte
);
5512 encode_coding_object (coding
, object
, from
, from_byte
,
5513 to
, from_byte
+ len
, Qt
);
5514 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5515 set_buffer_internal (cur
);
5517 else if (STRINGP (object
))
5519 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5520 SBYTES (object
), Qt
);
5524 coding
->dst_object
= make_unibyte_string (buf
, len
);
5525 coding
->produced
= len
;
5528 len
= coding
->produced
;
5529 object
= coding
->dst_object
;
5530 buf
= SSDATA (object
);
5533 if (pty_max_bytes
== 0)
5535 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5536 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5537 if (pty_max_bytes
< 0)
5538 pty_max_bytes
= 250;
5540 pty_max_bytes
= 250;
5542 /* Deduct one, to leave space for the eof. */
5546 /* If there is already data in the write_queue, put the new data
5547 in the back of queue. Otherwise, ignore it. */
5548 if (!NILP (p
->write_queue
))
5549 write_queue_push (p
, object
, buf
, len
, 0);
5551 do /* while !NILP (p->write_queue) */
5553 ptrdiff_t cur_len
= -1;
5554 const char *cur_buf
;
5555 Lisp_Object cur_object
;
5557 /* If write_queue is empty, ignore it. */
5558 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5562 cur_object
= object
;
5567 /* Send this batch, using one or more write calls. */
5568 ptrdiff_t written
= 0;
5569 int outfd
= p
->outfd
;
5570 #ifdef DATAGRAM_SOCKETS
5571 if (DATAGRAM_CHAN_P (outfd
))
5573 rv
= sendto (outfd
, cur_buf
, cur_len
,
5574 0, datagram_address
[outfd
].sa
,
5575 datagram_address
[outfd
].len
);
5578 else if (errno
== EMSGSIZE
)
5579 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5586 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5589 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5590 rv
= (written
? 0 : -1);
5591 #ifdef ADAPTIVE_READ_BUFFERING
5592 if (p
->read_output_delay
> 0
5593 && p
->adaptive_read_buffering
== 1)
5595 p
->read_output_delay
= 0;
5596 process_output_delay_count
--;
5597 p
->read_output_skip
= 0;
5606 || errno
== EWOULDBLOCK
5612 /* Buffer is full. Wait, accepting input;
5613 that may allow the program
5614 to finish doing output and read more. */
5616 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5617 /* A gross hack to work around a bug in FreeBSD.
5618 In the following sequence, read(2) returns
5622 write(2) 954 bytes, get EAGAIN
5623 read(2) 1024 bytes in process_read_output
5624 read(2) 11 bytes in process_read_output
5626 That is, read(2) returns more bytes than have
5627 ever been written successfully. The 1033 bytes
5628 read are the 1022 bytes written successfully
5629 after processing (for example with CRs added if
5630 the terminal is set up that way which it is
5631 here). The same bytes will be seen again in a
5632 later read(2), without the CRs. */
5634 if (errno
== EAGAIN
)
5637 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5639 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5641 /* Put what we should have written in wait_queue. */
5642 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5643 wait_reading_process_output (0, 20 * 1000 * 1000,
5644 0, 0, Qnil
, NULL
, 0);
5645 /* Reread queue, to see what is left. */
5648 else if (errno
== EPIPE
)
5650 p
->raw_status_new
= 0;
5651 pset_status (p
, list2 (Qexit
, make_number (256)));
5652 p
->tick
= ++process_tick
;
5653 deactivate_process (proc
);
5654 error ("process %s no longer connected to pipe; closed it",
5658 /* This is a real error. */
5659 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5665 while (!NILP (p
->write_queue
));
5668 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5670 doc
: /* Send current contents of region as input to PROCESS.
5671 PROCESS may be a process, a buffer, the name of a process or buffer, or
5672 nil, indicating the current buffer's process.
5673 Called from program, takes three arguments, PROCESS, START and END.
5674 If the region is more than 500 characters long,
5675 it is sent in several bunches. This may happen even for shorter regions.
5676 Output from processes can arrive in between bunches. */)
5677 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5680 ptrdiff_t start1
, end1
;
5682 proc
= get_process (process
);
5683 validate_region (&start
, &end
);
5685 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5686 move_gap (XINT (start
));
5688 start1
= CHAR_TO_BYTE (XINT (start
));
5689 end1
= CHAR_TO_BYTE (XINT (end
));
5690 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5691 Fcurrent_buffer ());
5696 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5698 doc
: /* Send PROCESS the contents of STRING as input.
5699 PROCESS may be a process, a buffer, the name of a process or buffer, or
5700 nil, indicating the current buffer's process.
5701 If STRING is more than 500 characters long,
5702 it is sent in several bunches. This may happen even for shorter strings.
5703 Output from processes can arrive in between bunches. */)
5704 (Lisp_Object process
, Lisp_Object string
)
5707 CHECK_STRING (string
);
5708 proc
= get_process (process
);
5709 send_process (proc
, SSDATA (string
),
5710 SBYTES (string
), string
);
5714 /* Return the foreground process group for the tty/pty that
5715 the process P uses. */
5717 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5722 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5725 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5726 master side. Try the slave side. */
5727 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5731 ioctl (fd
, TIOCGPGRP
, &gid
);
5735 #endif /* defined (TIOCGPGRP ) */
5740 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5741 Sprocess_running_child_p
, 0, 1, 0,
5742 doc
: /* Return t if PROCESS has given the terminal to a child.
5743 If the operating system does not make it possible to find out,
5744 return t unconditionally. */)
5745 (Lisp_Object process
)
5747 /* Initialize in case ioctl doesn't exist or gives an error,
5748 in a way that will cause returning t. */
5751 struct Lisp_Process
*p
;
5753 proc
= get_process (process
);
5754 p
= XPROCESS (proc
);
5756 if (!EQ (p
->type
, Qreal
))
5757 error ("Process %s is not a subprocess",
5760 error ("Process %s is not active",
5763 gid
= emacs_get_tty_pgrp (p
);
5770 /* send a signal number SIGNO to PROCESS.
5771 If CURRENT_GROUP is t, that means send to the process group
5772 that currently owns the terminal being used to communicate with PROCESS.
5773 This is used for various commands in shell mode.
5774 If CURRENT_GROUP is lambda, that means send to the process group
5775 that currently owns the terminal, but only if it is NOT the shell itself.
5777 If NOMSG is zero, insert signal-announcements into process's buffers
5780 If we can, we try to signal PROCESS by sending control characters
5781 down the pty. This allows us to signal inferiors who have changed
5782 their uid, for which killpg would return an EPERM error. */
5785 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5789 register struct Lisp_Process
*p
;
5793 proc
= get_process (process
);
5794 p
= XPROCESS (proc
);
5796 if (!EQ (p
->type
, Qreal
))
5797 error ("Process %s is not a subprocess",
5800 error ("Process %s is not active",
5804 current_group
= Qnil
;
5806 /* If we are using pgrps, get a pgrp number and make it negative. */
5807 if (NILP (current_group
))
5808 /* Send the signal to the shell's process group. */
5812 #ifdef SIGNALS_VIA_CHARACTERS
5813 /* If possible, send signals to the entire pgrp
5814 by sending an input character to it. */
5817 cc_t
*sig_char
= NULL
;
5819 tcgetattr (p
->infd
, &t
);
5824 sig_char
= &t
.c_cc
[VINTR
];
5828 sig_char
= &t
.c_cc
[VQUIT
];
5832 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5833 sig_char
= &t
.c_cc
[VSWTCH
];
5835 sig_char
= &t
.c_cc
[VSUSP
];
5840 if (sig_char
&& *sig_char
!= CDISABLE
)
5842 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5845 /* If we can't send the signal with a character,
5846 fall through and send it another way. */
5848 /* The code above may fall through if it can't
5849 handle the signal. */
5850 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5853 /* Get the current pgrp using the tty itself, if we have that.
5854 Otherwise, use the pty to get the pgrp.
5855 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5856 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5857 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5858 His patch indicates that if TIOCGPGRP returns an error, then
5859 we should just assume that p->pid is also the process group id. */
5861 gid
= emacs_get_tty_pgrp (p
);
5864 /* If we can't get the information, assume
5865 the shell owns the tty. */
5868 /* It is not clear whether anything really can set GID to -1.
5869 Perhaps on some system one of those ioctls can or could do so.
5870 Or perhaps this is vestigial. */
5873 #else /* ! defined (TIOCGPGRP ) */
5874 /* Can't select pgrps on this system, so we know that
5875 the child itself heads the pgrp. */
5877 #endif /* ! defined (TIOCGPGRP ) */
5879 /* If current_group is lambda, and the shell owns the terminal,
5880 don't send any signal. */
5881 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5889 p
->raw_status_new
= 0;
5890 pset_status (p
, Qrun
);
5891 p
->tick
= ++process_tick
;
5894 status_notify (NULL
);
5895 redisplay_preserve_echo_area (13);
5898 #endif /* ! defined (SIGCONT) */
5902 flush_pending_output (p
->infd
);
5906 /* If we don't have process groups, send the signal to the immediate
5907 subprocess. That isn't really right, but it's better than any
5908 obvious alternative. */
5911 kill (p
->pid
, signo
);
5915 /* gid may be a pid, or minus a pgrp's number */
5917 if (!NILP (current_group
))
5919 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5920 EMACS_KILLPG (gid
, signo
);
5927 #else /* ! defined (TIOCSIGSEND) */
5928 EMACS_KILLPG (gid
, signo
);
5929 #endif /* ! defined (TIOCSIGSEND) */
5932 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5933 doc
: /* Interrupt process PROCESS.
5934 PROCESS may be a process, a buffer, or the name of a process or buffer.
5935 No arg or nil means current buffer's process.
5936 Second arg CURRENT-GROUP non-nil means send signal to
5937 the current process-group of the process's controlling terminal
5938 rather than to the process's own process group.
5939 If the process is a shell, this means interrupt current subjob
5940 rather than the shell.
5942 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5943 don't send the signal. */)
5944 (Lisp_Object process
, Lisp_Object current_group
)
5946 process_send_signal (process
, SIGINT
, current_group
, 0);
5950 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5951 doc
: /* Kill process PROCESS. May be process or name of one.
5952 See function `interrupt-process' for more details on usage. */)
5953 (Lisp_Object process
, Lisp_Object current_group
)
5955 process_send_signal (process
, SIGKILL
, current_group
, 0);
5959 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5960 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5961 See function `interrupt-process' for more details on usage. */)
5962 (Lisp_Object process
, Lisp_Object current_group
)
5964 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5968 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5969 doc
: /* Stop process PROCESS. May be process or name of one.
5970 See function `interrupt-process' for more details on usage.
5971 If PROCESS is a network or serial process, inhibit handling of incoming
5973 (Lisp_Object process
, Lisp_Object current_group
)
5975 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5977 struct Lisp_Process
*p
;
5979 p
= XPROCESS (process
);
5980 if (NILP (p
->command
)
5983 FD_CLR (p
->infd
, &input_wait_mask
);
5984 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5986 pset_command (p
, Qt
);
5990 error ("No SIGTSTP support");
5992 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5997 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5998 doc
: /* Continue process PROCESS. May be process or name of one.
5999 See function `interrupt-process' for more details on usage.
6000 If PROCESS is a network or serial process, resume handling of incoming
6002 (Lisp_Object process
, Lisp_Object current_group
)
6004 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6006 struct Lisp_Process
*p
;
6008 p
= XPROCESS (process
);
6009 if (EQ (p
->command
, Qt
)
6011 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6013 FD_SET (p
->infd
, &input_wait_mask
);
6014 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6016 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6017 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6018 #else /* not WINDOWSNT */
6019 tcflush (p
->infd
, TCIFLUSH
);
6020 #endif /* not WINDOWSNT */
6022 pset_command (p
, Qnil
);
6026 process_send_signal (process
, SIGCONT
, current_group
, 0);
6028 error ("No SIGCONT support");
6033 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6034 2, 2, "sProcess (name or number): \nnSignal code: ",
6035 doc
: /* Send PROCESS the signal with code SIGCODE.
6036 PROCESS may also be a number specifying the process id of the
6037 process to signal; in this case, the process need not be a child of
6039 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6040 (Lisp_Object process
, Lisp_Object sigcode
)
6044 if (STRINGP (process
))
6046 Lisp_Object tem
= Fget_process (process
);
6049 Lisp_Object process_number
=
6050 string_to_number (SSDATA (process
), 10, 1);
6051 if (INTEGERP (process_number
) || FLOATP (process_number
))
6052 tem
= process_number
;
6056 else if (!NUMBERP (process
))
6057 process
= get_process (process
);
6062 if (NUMBERP (process
))
6063 CONS_TO_INTEGER (process
, pid_t
, pid
);
6066 CHECK_PROCESS (process
);
6067 pid
= XPROCESS (process
)->pid
;
6069 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6072 #define parse_signal(NAME, VALUE) \
6073 else if (!xstrcasecmp (name, NAME)) \
6074 XSETINT (sigcode, VALUE)
6076 if (INTEGERP (sigcode
))
6077 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6082 CHECK_SYMBOL (sigcode
);
6083 name
= SSDATA (SYMBOL_NAME (sigcode
));
6085 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6091 parse_signal ("usr1", SIGUSR1
);
6094 parse_signal ("usr2", SIGUSR2
);
6096 parse_signal ("term", SIGTERM
);
6098 parse_signal ("hup", SIGHUP
);
6100 parse_signal ("int", SIGINT
);
6102 parse_signal ("quit", SIGQUIT
);
6104 parse_signal ("ill", SIGILL
);
6105 parse_signal ("abrt", SIGABRT
);
6107 parse_signal ("emt", SIGEMT
);
6110 parse_signal ("kill", SIGKILL
);
6112 parse_signal ("fpe", SIGFPE
);
6114 parse_signal ("bus", SIGBUS
);
6116 parse_signal ("segv", SIGSEGV
);
6118 parse_signal ("sys", SIGSYS
);
6121 parse_signal ("pipe", SIGPIPE
);
6124 parse_signal ("alrm", SIGALRM
);
6127 parse_signal ("urg", SIGURG
);
6130 parse_signal ("stop", SIGSTOP
);
6133 parse_signal ("tstp", SIGTSTP
);
6136 parse_signal ("cont", SIGCONT
);
6139 parse_signal ("chld", SIGCHLD
);
6142 parse_signal ("ttin", SIGTTIN
);
6145 parse_signal ("ttou", SIGTTOU
);
6148 parse_signal ("io", SIGIO
);
6151 parse_signal ("xcpu", SIGXCPU
);
6154 parse_signal ("xfsz", SIGXFSZ
);
6157 parse_signal ("vtalrm", SIGVTALRM
);
6160 parse_signal ("prof", SIGPROF
);
6163 parse_signal ("winch", SIGWINCH
);
6166 parse_signal ("info", SIGINFO
);
6169 error ("Undefined signal name %s", name
);
6174 return make_number (kill (pid
, XINT (sigcode
)));
6177 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6178 doc
: /* Make PROCESS see end-of-file in its input.
6179 EOF comes after any text already sent to it.
6180 PROCESS may be a process, a buffer, the name of a process or buffer, or
6181 nil, indicating the current buffer's process.
6182 If PROCESS is a network connection, or is a process communicating
6183 through a pipe (as opposed to a pty), then you cannot send any more
6184 text to PROCESS after you call this function.
6185 If PROCESS is a serial process, wait until all output written to the
6186 process has been transmitted to the serial port. */)
6187 (Lisp_Object process
)
6190 struct coding_system
*coding
;
6192 if (DATAGRAM_CONN_P (process
))
6195 proc
= get_process (process
);
6196 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6198 /* Make sure the process is really alive. */
6199 if (XPROCESS (proc
)->raw_status_new
)
6200 update_status (XPROCESS (proc
));
6201 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6202 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6204 if (CODING_REQUIRE_FLUSHING (coding
))
6206 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6207 send_process (proc
, "", 0, Qnil
);
6210 if (XPROCESS (proc
)->pty_flag
)
6211 send_process (proc
, "\004", 1, Qnil
);
6212 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6215 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6216 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6217 #endif /* not WINDOWSNT */
6218 /* Do nothing on Windows because writes are blocking. */
6222 int old_outfd
, new_outfd
;
6224 #ifdef HAVE_SHUTDOWN
6225 /* If this is a network connection, or socketpair is used
6226 for communication with the subprocess, call shutdown to cause EOF.
6227 (In some old system, shutdown to socketpair doesn't work.
6228 Then we just can't win.) */
6229 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6230 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6231 shutdown (XPROCESS (proc
)->outfd
, 1);
6232 /* In case of socketpair, outfd == infd, so don't close it. */
6233 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6234 emacs_close (XPROCESS (proc
)->outfd
);
6235 #else /* not HAVE_SHUTDOWN */
6236 emacs_close (XPROCESS (proc
)->outfd
);
6237 #endif /* not HAVE_SHUTDOWN */
6238 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6241 old_outfd
= XPROCESS (proc
)->outfd
;
6243 if (!proc_encode_coding_system
[new_outfd
])
6244 proc_encode_coding_system
[new_outfd
]
6245 = xmalloc (sizeof (struct coding_system
));
6246 *proc_encode_coding_system
[new_outfd
]
6247 = *proc_encode_coding_system
[old_outfd
];
6248 memset (proc_encode_coding_system
[old_outfd
], 0,
6249 sizeof (struct coding_system
));
6251 XPROCESS (proc
)->outfd
= new_outfd
;
6256 /* If the status of the process DESIRED has changed, return true and
6257 set *STATUS to its exit status; otherwise, return false.
6258 If HAVE is nonnegative, assume that HAVE = waitpid (HAVE, STATUS, ...)
6259 has already been invoked, and do not invoke waitpid again. */
6262 process_status_retrieved (pid_t desired
, pid_t have
, int *status
)
6266 /* Invoke waitpid only with a known process ID; do not invoke
6267 waitpid with a nonpositive argument. Otherwise, Emacs might
6268 reap an unwanted process by mistake. For example, invoking
6269 waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
6270 so that another thread running glib won't find them. */
6272 have
= waitpid (desired
, status
, WNOHANG
| WUNTRACED
);
6273 while (have
< 0 && errno
== EINTR
);
6276 return have
== desired
;
6279 /* If PID is nonnegative, the child process PID with wait status W has
6280 changed its status; record this and return true.
6282 If PID is negative, ignore W, and look for known child processes
6283 of Emacs whose status have changed. For each one found, record its new
6286 All we do is change the status; we do not run sentinels or print
6287 notifications. That is saved for the next time keyboard input is
6288 done, in order to avoid timing errors.
6290 ** WARNING: this can be called during garbage collection.
6291 Therefore, it must not be fooled by the presence of mark bits in
6294 ** USG WARNING: Although it is not obvious from the documentation
6295 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6296 signal() before executing at least one wait(), otherwise the
6297 handler will be called again, resulting in an infinite loop. The
6298 relevant portion of the documentation reads "SIGCLD signals will be
6299 queued and the signal-catching function will be continually
6300 reentered until the queue is empty". Invoking signal() causes the
6301 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6304 ** Malloc WARNING: This should never call malloc either directly or
6305 indirectly; if it does, that is a bug */
6308 record_child_status_change (pid_t pid
, int w
)
6313 /* On POSIXish hosts, record at most one child only if we already
6314 know one child that has exited. */
6315 bool record_at_most_one_child
= 0 <= pid
;
6317 /* On DOS_NT (the only porting target that lacks WNOHANG),
6318 record the status of at most one child process, since the SIGCHLD
6319 handler must return right away. If any more processes want to
6320 signal us, we will get another signal. */
6321 bool record_at_most_one_child
= 1;
6326 /* Find the process that signaled us, and record its status. */
6328 /* The process can have been deleted by Fdelete_process. */
6329 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6331 bool all_pids_are_fixnums
6332 = (MOST_NEGATIVE_FIXNUM
<= TYPE_MINIMUM (pid_t
)
6333 && TYPE_MAXIMUM (pid_t
) <= MOST_POSITIVE_FIXNUM
);
6334 Lisp_Object xpid
= XCAR (tail
);
6335 if (all_pids_are_fixnums
? INTEGERP (xpid
) : NUMBERP (xpid
))
6338 if (INTEGERP (xpid
))
6339 deleted_pid
= XINT (xpid
);
6341 deleted_pid
= XFLOAT_DATA (xpid
);
6342 if (process_status_retrieved (deleted_pid
, pid
, &w
))
6344 XSETCAR (tail
, Qnil
);
6345 if (record_at_most_one_child
)
6351 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6352 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6354 Lisp_Object proc
= XCDR (XCAR (tail
));
6355 struct Lisp_Process
*p
= XPROCESS (proc
);
6356 if (p
->alive
&& process_status_retrieved (p
->pid
, pid
, &w
))
6358 /* Change the status of the process that was found. */
6359 p
->tick
= ++process_tick
;
6361 p
->raw_status_new
= 1;
6363 /* If process has terminated, stop waiting for its output. */
6364 if (WIFSIGNALED (w
) || WIFEXITED (w
))
6366 int clear_desc_flag
= 0;
6369 clear_desc_flag
= 1;
6371 /* clear_desc_flag avoids a compiler bug in Microsoft C. */
6372 if (clear_desc_flag
)
6374 FD_CLR (p
->infd
, &input_wait_mask
);
6375 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6379 /* Tell wait_reading_process_output that it needs to wake up and
6381 if (input_available_clear_time
)
6382 *input_available_clear_time
= make_emacs_time (0, 0);
6384 if (record_at_most_one_child
)
6391 /* The caller successfully waited for a pid but no asynchronous
6392 process was found for it, so this is a synchronous process. */
6394 synch_process_alive
= 0;
6396 /* Report the status of the synchronous process. */
6398 synch_process_retcode
= WEXITSTATUS (w
);
6399 else if (WIFSIGNALED (w
))
6400 synch_process_termsig
= WTERMSIG (w
);
6402 /* Tell wait_reading_process_output that it needs to wake up and
6404 if (input_available_clear_time
)
6405 *input_available_clear_time
= make_emacs_time (0, 0);
6413 handle_child_signal (int sig
)
6415 record_child_status_change (-1, 0);
6419 deliver_child_signal (int sig
)
6421 deliver_process_signal (sig
, handle_child_signal
);
6424 #endif /* SIGCHLD */
6428 exec_sentinel_unwind (Lisp_Object data
)
6430 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6435 exec_sentinel_error_handler (Lisp_Object error_val
)
6437 cmd_error_internal (error_val
, "error in process sentinel: ");
6439 update_echo_area ();
6440 Fsleep_for (make_number (2), Qnil
);
6445 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6447 Lisp_Object sentinel
, odeactivate
;
6448 struct Lisp_Process
*p
= XPROCESS (proc
);
6449 ptrdiff_t count
= SPECPDL_INDEX ();
6450 bool outer_running_asynch_code
= running_asynch_code
;
6451 int waiting
= waiting_for_user_input_p
;
6453 if (inhibit_sentinels
)
6456 /* No need to gcpro these, because all we do with them later
6457 is test them for EQness, and none of them should be a string. */
6458 odeactivate
= Vdeactivate_mark
;
6460 Lisp_Object obuffer
, okeymap
;
6461 XSETBUFFER (obuffer
, current_buffer
);
6462 okeymap
= BVAR (current_buffer
, keymap
);
6465 /* There's no good reason to let sentinels change the current
6466 buffer, and many callers of accept-process-output, sit-for, and
6467 friends don't expect current-buffer to be changed from under them. */
6468 record_unwind_current_buffer ();
6470 sentinel
= p
->sentinel
;
6471 if (NILP (sentinel
))
6474 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6475 assure that it gets restored no matter how the sentinel exits. */
6476 pset_sentinel (p
, Qnil
);
6477 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6478 /* Inhibit quit so that random quits don't screw up a running filter. */
6479 specbind (Qinhibit_quit
, Qt
);
6480 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6482 /* In case we get recursively called,
6483 and we already saved the match data nonrecursively,
6484 save the same match data in safely recursive fashion. */
6485 if (outer_running_asynch_code
)
6488 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6489 restore_search_regs ();
6490 record_unwind_save_match_data ();
6491 Fset_match_data (tem
, Qt
);
6494 /* For speed, if a search happens within this code,
6495 save the match data in a special nonrecursive fashion. */
6496 running_asynch_code
= 1;
6498 internal_condition_case_1 (read_process_output_call
,
6500 Fcons (proc
, Fcons (reason
, Qnil
))),
6501 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6502 exec_sentinel_error_handler
);
6504 /* If we saved the match data nonrecursively, restore it now. */
6505 restore_search_regs ();
6506 running_asynch_code
= outer_running_asynch_code
;
6508 Vdeactivate_mark
= odeactivate
;
6510 /* Restore waiting_for_user_input_p as it was
6511 when we were called, in case the filter clobbered it. */
6512 waiting_for_user_input_p
= waiting
;
6515 if (! EQ (Fcurrent_buffer (), obuffer
)
6516 || ! EQ (current_buffer
->keymap
, okeymap
))
6518 /* But do it only if the caller is actually going to read events.
6519 Otherwise there's no need to make him wake up, and it could
6520 cause trouble (for example it would make sit_for return). */
6521 if (waiting_for_user_input_p
== -1)
6522 record_asynch_buffer_change ();
6524 unbind_to (count
, Qnil
);
6527 /* Report all recent events of a change in process status
6528 (either run the sentinel or output a message).
6529 This is usually done while Emacs is waiting for keyboard input
6530 but can be done at other times. */
6533 status_notify (struct Lisp_Process
*deleting_process
)
6535 register Lisp_Object proc
, buffer
;
6536 Lisp_Object tail
, msg
;
6537 struct gcpro gcpro1
, gcpro2
;
6541 /* We need to gcpro tail; if read_process_output calls a filter
6542 which deletes a process and removes the cons to which tail points
6543 from Vprocess_alist, and then causes a GC, tail is an unprotected
6547 /* Set this now, so that if new processes are created by sentinels
6548 that we run, we get called again to handle their status changes. */
6549 update_tick
= process_tick
;
6551 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6554 register struct Lisp_Process
*p
;
6556 proc
= Fcdr (XCAR (tail
));
6557 p
= XPROCESS (proc
);
6559 if (p
->tick
!= p
->update_tick
)
6561 p
->update_tick
= p
->tick
;
6563 /* If process is still active, read any output that remains. */
6564 while (! EQ (p
->filter
, Qt
)
6565 && ! EQ (p
->status
, Qconnect
)
6566 && ! EQ (p
->status
, Qlisten
)
6567 /* Network or serial process not stopped: */
6568 && ! EQ (p
->command
, Qt
)
6570 && p
!= deleting_process
6571 && read_process_output (proc
, p
->infd
) > 0);
6575 /* Get the text to use for the message. */
6576 if (p
->raw_status_new
)
6578 msg
= status_message (p
);
6580 /* If process is terminated, deactivate it or delete it. */
6582 if (CONSP (p
->status
))
6583 symbol
= XCAR (p
->status
);
6585 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6586 || EQ (symbol
, Qclosed
))
6588 if (delete_exited_processes
)
6589 remove_process (proc
);
6591 deactivate_process (proc
);
6594 /* The actions above may have further incremented p->tick.
6595 So set p->update_tick again
6596 so that an error in the sentinel will not cause
6597 this code to be run again. */
6598 p
->update_tick
= p
->tick
;
6599 /* Now output the message suitably. */
6600 if (!NILP (p
->sentinel
))
6601 exec_sentinel (proc
, msg
);
6602 /* Don't bother with a message in the buffer
6603 when a process becomes runnable. */
6604 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6607 struct buffer
*old
= current_buffer
;
6608 ptrdiff_t opoint
, opoint_byte
;
6609 ptrdiff_t before
, before_byte
;
6611 /* Avoid error if buffer is deleted
6612 (probably that's why the process is dead, too) */
6613 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6615 Fset_buffer (buffer
);
6618 opoint_byte
= PT_BYTE
;
6619 /* Insert new output into buffer
6620 at the current end-of-output marker,
6621 thus preserving logical ordering of input and output. */
6622 if (XMARKER (p
->mark
)->buffer
)
6623 Fgoto_char (p
->mark
);
6625 SET_PT_BOTH (ZV
, ZV_BYTE
);
6628 before_byte
= PT_BYTE
;
6630 tem
= BVAR (current_buffer
, read_only
);
6631 bset_read_only (current_buffer
, Qnil
);
6632 insert_string ("\nProcess ");
6633 { /* FIXME: temporary kludge */
6634 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6635 insert_string (" ");
6637 bset_read_only (current_buffer
, tem
);
6638 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6640 if (opoint
>= before
)
6641 SET_PT_BOTH (opoint
+ (PT
- before
),
6642 opoint_byte
+ (PT_BYTE
- before_byte
));
6644 SET_PT_BOTH (opoint
, opoint_byte
);
6646 set_buffer_internal (old
);
6651 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6656 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6657 Sset_process_coding_system
, 1, 3, 0,
6658 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6659 DECODING will be used to decode subprocess output and ENCODING to
6660 encode subprocess input. */)
6661 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6663 register struct Lisp_Process
*p
;
6665 CHECK_PROCESS (process
);
6666 p
= XPROCESS (process
);
6668 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6670 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6671 Fcheck_coding_system (decoding
);
6672 Fcheck_coding_system (encoding
);
6673 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6674 pset_decode_coding_system (p
, decoding
);
6675 pset_encode_coding_system (p
, encoding
);
6676 setup_process_coding_systems (process
);
6681 DEFUN ("process-coding-system",
6682 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6683 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6684 (register Lisp_Object process
)
6686 CHECK_PROCESS (process
);
6687 return Fcons (XPROCESS (process
)->decode_coding_system
,
6688 XPROCESS (process
)->encode_coding_system
);
6691 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6692 Sset_process_filter_multibyte
, 2, 2, 0,
6693 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6694 If FLAG is non-nil, the filter is given multibyte strings.
6695 If FLAG is nil, the filter is given unibyte strings. In this case,
6696 all character code conversion except for end-of-line conversion is
6698 (Lisp_Object process
, Lisp_Object flag
)
6700 register struct Lisp_Process
*p
;
6702 CHECK_PROCESS (process
);
6703 p
= XPROCESS (process
);
6705 pset_decode_coding_system
6706 (p
, raw_text_coding_system (p
->decode_coding_system
));
6707 setup_process_coding_systems (process
);
6712 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6713 Sprocess_filter_multibyte_p
, 1, 1, 0,
6714 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6715 (Lisp_Object process
)
6717 register struct Lisp_Process
*p
;
6718 struct coding_system
*coding
;
6720 CHECK_PROCESS (process
);
6721 p
= XPROCESS (process
);
6722 coding
= proc_decode_coding_system
[p
->infd
];
6723 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6732 add_gpm_wait_descriptor (int desc
)
6734 add_keyboard_wait_descriptor (desc
);
6738 delete_gpm_wait_descriptor (int desc
)
6740 delete_keyboard_wait_descriptor (desc
);
6745 # ifdef USABLE_SIGIO
6747 /* Return nonzero if *MASK has a bit set
6748 that corresponds to one of the keyboard input descriptors. */
6751 keyboard_bit_set (fd_set
*mask
)
6755 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6756 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6757 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6764 #else /* not subprocesses */
6766 /* Defined on msdos.c. */
6767 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6768 EMACS_TIME
*, void *);
6770 /* Implementation of wait_reading_process_output, assuming that there
6771 are no subprocesses. Used only by the MS-DOS build.
6773 Wait for timeout to elapse and/or keyboard input to be available.
6777 If negative, gobble data immediately available but don't wait for any.
6780 an additional duration to wait, measured in nanoseconds
6781 If TIME_LIMIT is zero, then:
6782 If NSECS == 0, there is no limit.
6783 If NSECS > 0, the timeout consists of NSECS only.
6784 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6787 0 to ignore keyboard input, or
6788 1 to return when input is available, or
6789 -1 means caller will actually read the input, so don't throw to
6792 see full version for other parameters. We know that wait_proc will
6793 always be NULL, since `subprocesses' isn't defined.
6795 DO_DISPLAY means redisplay should be done to show subprocess
6796 output that arrives.
6798 Return true if we received input from any process. */
6801 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6803 Lisp_Object wait_for_cell
,
6804 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6807 EMACS_TIME end_time
, timeout
;
6814 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6815 time_limit
= TYPE_MAXIMUM (time_t);
6817 /* What does time_limit really mean? */
6818 if (time_limit
|| 0 < nsecs
)
6820 timeout
= make_emacs_time (time_limit
, nsecs
);
6821 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6824 /* Turn off periodic alarms (in case they are in use)
6825 and then turn off any other atimers,
6826 because the select emulator uses alarms. */
6828 turn_on_atimers (0);
6832 int timeout_reduced_for_timers
= 0;
6833 SELECT_TYPE waitchannels
;
6836 /* If calling from keyboard input, do not quit
6837 since we want to return C-g as an input character.
6838 Otherwise, do pending quit if requested. */
6842 /* Exit now if the cell we're waiting for became non-nil. */
6843 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6846 /* Compute time from now till when time limit is up */
6847 /* Exit if already run out */
6850 /* A negative timeout means
6851 gobble output available now
6852 but don't wait at all. */
6854 timeout
= make_emacs_time (0, 0);
6856 else if (time_limit
|| 0 < nsecs
)
6858 EMACS_TIME now
= current_emacs_time ();
6859 if (EMACS_TIME_LE (end_time
, now
))
6861 timeout
= sub_emacs_time (end_time
, now
);
6865 timeout
= make_emacs_time (100000, 0);
6868 /* If our caller will not immediately handle keyboard events,
6869 run timer events directly.
6870 (Callers that will immediately read keyboard events
6871 call timer_delay on their own.) */
6872 if (NILP (wait_for_cell
))
6874 EMACS_TIME timer_delay
;
6878 unsigned old_timers_run
= timers_run
;
6879 timer_delay
= timer_check ();
6880 if (timers_run
!= old_timers_run
&& do_display
)
6881 /* We must retry, since a timer may have requeued itself
6882 and that could alter the time delay. */
6883 redisplay_preserve_echo_area (14);
6887 while (!detect_input_pending ());
6889 /* If there is unread keyboard input, also return. */
6891 && requeued_events_pending_p ())
6894 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6896 if (EMACS_TIME_LT (timer_delay
, timeout
))
6898 timeout
= timer_delay
;
6899 timeout_reduced_for_timers
= 1;
6904 /* Cause C-g and alarm signals to take immediate action,
6905 and cause input available signals to zero out timeout. */
6907 set_waiting_for_input (&timeout
);
6909 /* If a frame has been newly mapped and needs updating,
6910 reprocess its display stuff. */
6911 if (frame_garbaged
&& do_display
)
6913 clear_waiting_for_input ();
6914 redisplay_preserve_echo_area (15);
6916 set_waiting_for_input (&timeout
);
6919 /* Wait till there is something to do. */
6920 FD_ZERO (&waitchannels
);
6921 if (read_kbd
&& detect_input_pending ())
6925 if (read_kbd
|| !NILP (wait_for_cell
))
6926 FD_SET (0, &waitchannels
);
6927 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6932 /* Make C-g and alarm signals set flags again */
6933 clear_waiting_for_input ();
6935 /* If we woke up due to SIGWINCH, actually change size now. */
6936 do_pending_window_change (0);
6938 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6939 /* We waited the full specified time, so return now. */
6944 /* If the system call was interrupted, then go around the
6946 if (xerrno
== EINTR
)
6947 FD_ZERO (&waitchannels
);
6949 error ("select error: %s", emacs_strerror (xerrno
));
6952 /* Check for keyboard input */
6955 && detect_input_pending_run_timers (do_display
))
6957 swallow_events (do_display
);
6958 if (detect_input_pending_run_timers (do_display
))
6962 /* If there is unread keyboard input, also return. */
6964 && requeued_events_pending_p ())
6967 /* If wait_for_cell. check for keyboard input
6968 but don't run any timers.
6969 ??? (It seems wrong to me to check for keyboard
6970 input at all when wait_for_cell, but the code
6971 has been this way since July 1994.
6972 Try changing this after version 19.31.) */
6973 if (! NILP (wait_for_cell
)
6974 && detect_input_pending ())
6976 swallow_events (do_display
);
6977 if (detect_input_pending ())
6981 /* Exit now if the cell we're waiting for became non-nil. */
6982 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6991 #endif /* not subprocesses */
6993 /* The following functions are needed even if async subprocesses are
6994 not supported. Some of them are no-op stubs in that case. */
6996 /* Add DESC to the set of keyboard input descriptors. */
6999 add_keyboard_wait_descriptor (int desc
)
7001 #ifdef subprocesses /* actually means "not MSDOS" */
7002 FD_SET (desc
, &input_wait_mask
);
7003 FD_SET (desc
, &non_process_wait_mask
);
7004 if (desc
> max_input_desc
)
7005 max_input_desc
= desc
;
7009 /* From now on, do not expect DESC to give keyboard input. */
7012 delete_keyboard_wait_descriptor (int desc
)
7016 int lim
= max_input_desc
;
7018 FD_CLR (desc
, &input_wait_mask
);
7019 FD_CLR (desc
, &non_process_wait_mask
);
7021 if (desc
== max_input_desc
)
7022 for (fd
= 0; fd
< lim
; fd
++)
7023 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7024 max_input_desc
= fd
;
7028 /* Setup coding systems of PROCESS. */
7031 setup_process_coding_systems (Lisp_Object process
)
7034 struct Lisp_Process
*p
= XPROCESS (process
);
7036 int outch
= p
->outfd
;
7037 Lisp_Object coding_system
;
7039 if (inch
< 0 || outch
< 0)
7042 if (!proc_decode_coding_system
[inch
])
7043 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7044 coding_system
= p
->decode_coding_system
;
7045 if (! NILP (p
->filter
))
7047 else if (BUFFERP (p
->buffer
))
7049 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7050 coding_system
= raw_text_coding_system (coding_system
);
7052 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7054 if (!proc_encode_coding_system
[outch
])
7055 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7056 setup_coding_system (p
->encode_coding_system
,
7057 proc_encode_coding_system
[outch
]);
7061 /* Close all descriptors currently in use for communication
7062 with subprocess. This is used in a newly-forked subprocess
7063 to get rid of irrelevant descriptors. */
7066 close_process_descs (void)
7070 for (i
= 0; i
< MAXDESC
; i
++)
7072 Lisp_Object process
;
7073 process
= chan_process
[i
];
7074 if (!NILP (process
))
7076 int in
= XPROCESS (process
)->infd
;
7077 int out
= XPROCESS (process
)->outfd
;
7080 if (out
>= 0 && in
!= out
)
7087 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7088 doc
: /* Return the (or a) process associated with BUFFER.
7089 BUFFER may be a buffer or the name of one. */)
7090 (register Lisp_Object buffer
)
7093 register Lisp_Object buf
, tail
, proc
;
7095 if (NILP (buffer
)) return Qnil
;
7096 buf
= Fget_buffer (buffer
);
7097 if (NILP (buf
)) return Qnil
;
7099 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7101 proc
= Fcdr (XCAR (tail
));
7102 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7105 #endif /* subprocesses */
7109 DEFUN ("process-inherit-coding-system-flag",
7110 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7112 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7113 If this flag is t, `buffer-file-coding-system' of the buffer
7114 associated with PROCESS will inherit the coding system used to decode
7115 the process output. */)
7116 (register Lisp_Object process
)
7119 CHECK_PROCESS (process
);
7120 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7122 /* Ignore the argument and return the value of
7123 inherit-process-coding-system. */
7124 return inherit_process_coding_system
? Qt
: Qnil
;
7128 /* Kill all processes associated with `buffer'.
7129 If `buffer' is nil, kill all processes */
7132 kill_buffer_processes (Lisp_Object buffer
)
7135 Lisp_Object tail
, proc
;
7137 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7139 proc
= XCDR (XCAR (tail
));
7141 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7143 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7144 Fdelete_process (proc
);
7145 else if (XPROCESS (proc
)->infd
>= 0)
7146 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7149 #else /* subprocesses */
7150 /* Since we have no subprocesses, this does nothing. */
7151 #endif /* subprocesses */
7154 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7155 Swaiting_for_user_input_p
, 0, 0, 0,
7156 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7157 This is intended for use by asynchronous process output filters and sentinels. */)
7161 return (waiting_for_user_input_p
? Qt
: Qnil
);
7167 /* Stop reading input from keyboard sources. */
7170 hold_keyboard_input (void)
7175 /* Resume reading input from keyboard sources. */
7178 unhold_keyboard_input (void)
7183 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7186 kbd_on_hold_p (void)
7188 return kbd_is_on_hold
;
7192 /* Enumeration of and access to system processes a-la ps(1). */
7194 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7196 doc
: /* Return a list of numerical process IDs of all running processes.
7197 If this functionality is unsupported, return nil.
7199 See `process-attributes' for getting attributes of a process given its ID. */)
7202 return list_system_processes ();
7205 DEFUN ("process-attributes", Fprocess_attributes
,
7206 Sprocess_attributes
, 1, 1, 0,
7207 doc
: /* Return attributes of the process given by its PID, a number.
7209 Value is an alist where each element is a cons cell of the form
7213 If this functionality is unsupported, the value is nil.
7215 See `list-system-processes' for getting a list of all process IDs.
7217 The KEYs of the attributes that this function may return are listed
7218 below, together with the type of the associated VALUE (in parentheses).
7219 Not all platforms support all of these attributes; unsupported
7220 attributes will not appear in the returned alist.
7221 Unless explicitly indicated otherwise, numbers can have either
7222 integer or floating point values.
7224 euid -- Effective user User ID of the process (number)
7225 user -- User name corresponding to euid (string)
7226 egid -- Effective user Group ID of the process (number)
7227 group -- Group name corresponding to egid (string)
7228 comm -- Command name (executable name only) (string)
7229 state -- Process state code, such as "S", "R", or "T" (string)
7230 ppid -- Parent process ID (number)
7231 pgrp -- Process group ID (number)
7232 sess -- Session ID, i.e. process ID of session leader (number)
7233 ttname -- Controlling tty name (string)
7234 tpgid -- ID of foreground process group on the process's tty (number)
7235 minflt -- number of minor page faults (number)
7236 majflt -- number of major page faults (number)
7237 cminflt -- cumulative number of minor page faults (number)
7238 cmajflt -- cumulative number of major page faults (number)
7239 utime -- user time used by the process, in (current-time) format,
7240 which is a list of integers (HIGH LOW USEC PSEC)
7241 stime -- system time used by the process (current-time)
7242 time -- sum of utime and stime (current-time)
7243 cutime -- user time used by the process and its children (current-time)
7244 cstime -- system time used by the process and its children (current-time)
7245 ctime -- sum of cutime and cstime (current-time)
7246 pri -- priority of the process (number)
7247 nice -- nice value of the process (number)
7248 thcount -- process thread count (number)
7249 start -- time the process started (current-time)
7250 vsize -- virtual memory size of the process in KB's (number)
7251 rss -- resident set size of the process in KB's (number)
7252 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7253 pcpu -- percents of CPU time used by the process (floating-point number)
7254 pmem -- percents of total physical memory used by process's resident set
7255 (floating-point number)
7256 args -- command line which invoked the process (string). */)
7259 return system_process_attributes (pid
);
7263 /* This is not called "init_process" because that is the name of a
7264 Mach system call, so it would cause problems on Darwin systems. */
7266 init_process_emacs (void)
7271 inhibit_sentinels
= 0;
7275 if (! noninteractive
|| initialized
)
7278 struct sigaction action
;
7279 emacs_sigaction_init (&action
, deliver_child_signal
);
7280 sigaction (SIGCHLD
, &action
, 0);
7284 FD_ZERO (&input_wait_mask
);
7285 FD_ZERO (&non_keyboard_wait_mask
);
7286 FD_ZERO (&non_process_wait_mask
);
7287 FD_ZERO (&write_mask
);
7288 max_process_desc
= 0;
7289 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7291 #ifdef NON_BLOCKING_CONNECT
7292 FD_ZERO (&connect_wait_mask
);
7293 num_pending_connects
= 0;
7296 #ifdef ADAPTIVE_READ_BUFFERING
7297 process_output_delay_count
= 0;
7298 process_output_skip
= 0;
7301 /* Don't do this, it caused infinite select loops. The display
7302 method should call add_keyboard_wait_descriptor on stdin if it
7305 FD_SET (0, &input_wait_mask
);
7308 Vprocess_alist
= Qnil
;
7310 deleted_pid_list
= Qnil
;
7312 for (i
= 0; i
< MAXDESC
; i
++)
7314 chan_process
[i
] = Qnil
;
7315 proc_buffered_char
[i
] = -1;
7317 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7318 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7319 #ifdef DATAGRAM_SOCKETS
7320 memset (datagram_address
, 0, sizeof datagram_address
);
7324 Lisp_Object subfeatures
= Qnil
;
7325 const struct socket_options
*sopt
;
7327 #define ADD_SUBFEATURE(key, val) \
7328 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7330 #ifdef NON_BLOCKING_CONNECT
7331 ADD_SUBFEATURE (QCnowait
, Qt
);
7333 #ifdef DATAGRAM_SOCKETS
7334 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7336 #ifdef HAVE_SEQPACKET
7337 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7339 #ifdef HAVE_LOCAL_SOCKETS
7340 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7342 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7344 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7346 #ifdef HAVE_GETSOCKNAME
7347 ADD_SUBFEATURE (QCservice
, Qt
);
7349 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7350 ADD_SUBFEATURE (QCserver
, Qt
);
7353 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7354 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7356 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7359 #if defined (DARWIN_OS)
7360 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7361 processes. As such, we only change the default value. */
7364 char const *release
= (STRINGP (Voperating_system_release
)
7365 ? SSDATA (Voperating_system_release
)
7367 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7368 Vprocess_connection_type
= Qnil
;
7372 #endif /* subprocesses */
7377 syms_of_process (void)
7381 DEFSYM (Qprocessp
, "processp");
7382 DEFSYM (Qrun
, "run");
7383 DEFSYM (Qstop
, "stop");
7384 DEFSYM (Qsignal
, "signal");
7386 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7389 Qexit = intern_c_string ("exit");
7390 staticpro (&Qexit); */
7392 DEFSYM (Qopen
, "open");
7393 DEFSYM (Qclosed
, "closed");
7394 DEFSYM (Qconnect
, "connect");
7395 DEFSYM (Qfailed
, "failed");
7396 DEFSYM (Qlisten
, "listen");
7397 DEFSYM (Qlocal
, "local");
7398 DEFSYM (Qipv4
, "ipv4");
7400 DEFSYM (Qipv6
, "ipv6");
7402 DEFSYM (Qdatagram
, "datagram");
7403 DEFSYM (Qseqpacket
, "seqpacket");
7405 DEFSYM (QCport
, ":port");
7406 DEFSYM (QCspeed
, ":speed");
7407 DEFSYM (QCprocess
, ":process");
7409 DEFSYM (QCbytesize
, ":bytesize");
7410 DEFSYM (QCstopbits
, ":stopbits");
7411 DEFSYM (QCparity
, ":parity");
7412 DEFSYM (Qodd
, "odd");
7413 DEFSYM (Qeven
, "even");
7414 DEFSYM (QCflowcontrol
, ":flowcontrol");
7417 DEFSYM (QCsummary
, ":summary");
7419 DEFSYM (Qreal
, "real");
7420 DEFSYM (Qnetwork
, "network");
7421 DEFSYM (Qserial
, "serial");
7422 DEFSYM (QCbuffer
, ":buffer");
7423 DEFSYM (QChost
, ":host");
7424 DEFSYM (QCservice
, ":service");
7425 DEFSYM (QClocal
, ":local");
7426 DEFSYM (QCremote
, ":remote");
7427 DEFSYM (QCcoding
, ":coding");
7428 DEFSYM (QCserver
, ":server");
7429 DEFSYM (QCnowait
, ":nowait");
7430 DEFSYM (QCsentinel
, ":sentinel");
7431 DEFSYM (QClog
, ":log");
7432 DEFSYM (QCnoquery
, ":noquery");
7433 DEFSYM (QCstop
, ":stop");
7434 DEFSYM (QCoptions
, ":options");
7435 DEFSYM (QCplist
, ":plist");
7437 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7439 staticpro (&Vprocess_alist
);
7441 staticpro (&deleted_pid_list
);
7444 #endif /* subprocesses */
7446 DEFSYM (QCname
, ":name");
7447 DEFSYM (QCtype
, ":type");
7449 DEFSYM (Qeuid
, "euid");
7450 DEFSYM (Qegid
, "egid");
7451 DEFSYM (Quser
, "user");
7452 DEFSYM (Qgroup
, "group");
7453 DEFSYM (Qcomm
, "comm");
7454 DEFSYM (Qstate
, "state");
7455 DEFSYM (Qppid
, "ppid");
7456 DEFSYM (Qpgrp
, "pgrp");
7457 DEFSYM (Qsess
, "sess");
7458 DEFSYM (Qttname
, "ttname");
7459 DEFSYM (Qtpgid
, "tpgid");
7460 DEFSYM (Qminflt
, "minflt");
7461 DEFSYM (Qmajflt
, "majflt");
7462 DEFSYM (Qcminflt
, "cminflt");
7463 DEFSYM (Qcmajflt
, "cmajflt");
7464 DEFSYM (Qutime
, "utime");
7465 DEFSYM (Qstime
, "stime");
7466 DEFSYM (Qtime
, "time");
7467 DEFSYM (Qcutime
, "cutime");
7468 DEFSYM (Qcstime
, "cstime");
7469 DEFSYM (Qctime
, "ctime");
7470 DEFSYM (Qpri
, "pri");
7471 DEFSYM (Qnice
, "nice");
7472 DEFSYM (Qthcount
, "thcount");
7473 DEFSYM (Qstart
, "start");
7474 DEFSYM (Qvsize
, "vsize");
7475 DEFSYM (Qrss
, "rss");
7476 DEFSYM (Qetime
, "etime");
7477 DEFSYM (Qpcpu
, "pcpu");
7478 DEFSYM (Qpmem
, "pmem");
7479 DEFSYM (Qargs
, "args");
7481 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7482 doc
: /* Non-nil means delete processes immediately when they exit.
7483 A value of nil means don't delete them until `list-processes' is run. */);
7485 delete_exited_processes
= 1;
7488 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7489 doc
: /* Control type of device used to communicate with subprocesses.
7490 Values are nil to use a pipe, or t or `pty' to use a pty.
7491 The value has no effect if the system has no ptys or if all ptys are busy:
7492 then a pipe is used in any case.
7493 The value takes effect when `start-process' is called. */);
7494 Vprocess_connection_type
= Qt
;
7496 #ifdef ADAPTIVE_READ_BUFFERING
7497 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7498 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7499 On some systems, when Emacs reads the output from a subprocess, the output data
7500 is read in very small blocks, potentially resulting in very poor performance.
7501 This behavior can be remedied to some extent by setting this variable to a
7502 non-nil value, as it will automatically delay reading from such processes, to
7503 allow them to produce more output before Emacs tries to read it.
7504 If the value is t, the delay is reset after each write to the process; any other
7505 non-nil value means that the delay is not reset on write.
7506 The variable takes effect when `start-process' is called. */);
7507 Vprocess_adaptive_read_buffering
= Qt
;
7510 defsubr (&Sprocessp
);
7511 defsubr (&Sget_process
);
7512 defsubr (&Sdelete_process
);
7513 defsubr (&Sprocess_status
);
7514 defsubr (&Sprocess_exit_status
);
7515 defsubr (&Sprocess_id
);
7516 defsubr (&Sprocess_name
);
7517 defsubr (&Sprocess_tty_name
);
7518 defsubr (&Sprocess_command
);
7519 defsubr (&Sset_process_buffer
);
7520 defsubr (&Sprocess_buffer
);
7521 defsubr (&Sprocess_mark
);
7522 defsubr (&Sset_process_filter
);
7523 defsubr (&Sprocess_filter
);
7524 defsubr (&Sset_process_sentinel
);
7525 defsubr (&Sprocess_sentinel
);
7526 defsubr (&Sset_process_window_size
);
7527 defsubr (&Sset_process_inherit_coding_system_flag
);
7528 defsubr (&Sset_process_query_on_exit_flag
);
7529 defsubr (&Sprocess_query_on_exit_flag
);
7530 defsubr (&Sprocess_contact
);
7531 defsubr (&Sprocess_plist
);
7532 defsubr (&Sset_process_plist
);
7533 defsubr (&Sprocess_list
);
7534 defsubr (&Sstart_process
);
7535 defsubr (&Sserial_process_configure
);
7536 defsubr (&Smake_serial_process
);
7537 defsubr (&Sset_network_process_option
);
7538 defsubr (&Smake_network_process
);
7539 defsubr (&Sformat_network_address
);
7540 #if defined (HAVE_NET_IF_H)
7542 defsubr (&Snetwork_interface_list
);
7544 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7545 defsubr (&Snetwork_interface_info
);
7547 #endif /* defined (HAVE_NET_IF_H) */
7548 #ifdef DATAGRAM_SOCKETS
7549 defsubr (&Sprocess_datagram_address
);
7550 defsubr (&Sset_process_datagram_address
);
7552 defsubr (&Saccept_process_output
);
7553 defsubr (&Sprocess_send_region
);
7554 defsubr (&Sprocess_send_string
);
7555 defsubr (&Sinterrupt_process
);
7556 defsubr (&Skill_process
);
7557 defsubr (&Squit_process
);
7558 defsubr (&Sstop_process
);
7559 defsubr (&Scontinue_process
);
7560 defsubr (&Sprocess_running_child_p
);
7561 defsubr (&Sprocess_send_eof
);
7562 defsubr (&Ssignal_process
);
7563 defsubr (&Swaiting_for_user_input_p
);
7564 defsubr (&Sprocess_type
);
7565 defsubr (&Sset_process_coding_system
);
7566 defsubr (&Sprocess_coding_system
);
7567 defsubr (&Sset_process_filter_multibyte
);
7568 defsubr (&Sprocess_filter_multibyte_p
);
7570 #endif /* subprocesses */
7572 defsubr (&Sget_buffer_process
);
7573 defsubr (&Sprocess_inherit_coding_system_flag
);
7574 defsubr (&Slist_system_processes
);
7575 defsubr (&Sprocess_attributes
);