1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 1998
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
50 #endif /* not WINDOWSNT */
52 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
57 #ifdef NEED_NET_ERRNO_H
58 #include <net/errno.h>
59 #endif /* NEED_NET_ERRNO_H */
60 #endif /* HAVE_SOCKETS */
62 /* TERM is a poor-man's SLIP, used on Linux. */
67 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
68 #ifdef HAVE_BROKEN_INET_ADDR
69 #define IN_ADDR struct in_addr
70 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
72 #define IN_ADDR unsigned long
73 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
76 #if defined(BSD_SYSTEM) || defined(STRIDE)
77 #include <sys/ioctl.h>
78 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
80 #endif /* HAVE_PTYS and no O_NDELAY */
81 #endif /* BSD_SYSTEM || STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
104 #include "termhooks.h"
105 #include "termopts.h"
106 #include "commands.h"
108 #include "blockinput.h"
110 #define max(a, b) ((a) > (b) ? (a) : (b))
112 Lisp_Object Qprocessp
;
113 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
114 Lisp_Object Qlast_nonmenu_event
;
115 /* Qexit is declared and initialized in eval.c. */
117 /* a process object is a network connection when its childp field is neither
118 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
121 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
123 #define NETCONN_P(p) 0
124 #endif /* HAVE_SOCKETS */
126 /* Define first descriptor number available for subprocesses. */
128 #define FIRST_PROC_DESC 1
130 #define FIRST_PROC_DESC 3
133 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
136 #if !defined (SIGCHLD) && defined (SIGCLD)
137 #define SIGCHLD SIGCLD
140 #include "syssignal.h"
145 extern char *strerror ();
147 extern char *sys_errlist
[];
154 #ifndef SYS_SIGLIST_DECLARED
159 extern char *sys_siglist
[];
160 #endif /* not LINUX */
162 char *sys_siglist
[] =
168 "illegal instruction",
172 "floating point exception",
175 "segmentation violation",
176 "bad argument to system call",
177 "write on a pipe with no one to read it",
179 "software termination signal from kill",
181 "sendable stop signal not from tty",
182 "stop signal from tty",
183 "continue a stopped process",
184 "child status has changed",
185 "background read attempted from control tty",
186 "background write attempted from control tty",
187 "input record available at control tty",
188 "exceeded CPU time limit",
189 "exceeded file size limit"
191 #endif /* not WINDOWSNT */
194 #endif /* ! SYS_SIGLIST_DECLARED */
196 /* t means use pty, nil means use a pipe,
197 maybe other values to come. */
198 static Lisp_Object Vprocess_connection_type
;
202 #include <sys/socket.h>
206 /* These next two vars are non-static since sysdep.c uses them in the
207 emulation of `select'. */
208 /* Number of events of change of status of a process. */
210 /* Number of events for which the user or sentinel has been notified. */
213 #include "sysselect.h"
215 /* If we support a window system, turn on the code to poll periodically
216 to detect C-g. It isn't actually used when doing interrupt input. */
217 #ifdef HAVE_WINDOW_SYSTEM
218 #define POLL_FOR_INPUT
221 /* Mask of bits indicating the descriptors that we wait for input on. */
223 static SELECT_TYPE input_wait_mask
;
225 /* Mask that excludes keyboard input descriptor (s). */
227 static SELECT_TYPE non_keyboard_wait_mask
;
229 /* Mask that excludes process input descriptor (s). */
231 static SELECT_TYPE non_process_wait_mask
;
233 /* The largest descriptor currently in use for a process object. */
234 static int max_process_desc
;
236 /* The largest descriptor currently in use for keyboard input. */
237 static int max_keyboard_desc
;
239 /* Nonzero means delete a process right away if it exits. */
240 static int delete_exited_processes
;
242 /* Indexed by descriptor, gives the process (if any) for that descriptor */
243 Lisp_Object chan_process
[MAXDESC
];
245 /* Alist of elements (NAME . PROCESS) */
246 Lisp_Object Vprocess_alist
;
248 /* Buffered-ahead input char from process, indexed by channel.
249 -1 means empty (no char is buffered).
250 Used on sys V where the only way to tell if there is any
251 output from the process is to read at least one char.
252 Always -1 on systems that support FIONREAD. */
254 /* Don't make static; need to access externally. */
255 int proc_buffered_char
[MAXDESC
];
257 /* Table of `struct coding-system' for each process. */
258 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
259 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
261 static Lisp_Object
get_process ();
263 extern EMACS_TIME
timer_check ();
264 extern int timers_run
;
266 /* Maximum number of bytes to send to a pty without an eof. */
267 static int pty_max_bytes
;
269 extern Lisp_Object Vfile_name_coding_system
;
272 /* The file name of the pty opened by allocate_pty. */
274 static char pty_name
[24];
277 /* Compute the Lisp form of the process status, p->status, from
278 the numeric status that was returned by `wait'. */
280 Lisp_Object
status_convert ();
283 struct Lisp_Process
*p
;
285 union { int i
; WAITTYPE wt
; } u
;
286 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
287 p
->status
= status_convert (u
.wt
);
288 p
->raw_status_low
= Qnil
;
289 p
->raw_status_high
= Qnil
;
292 /* Convert a process status word in Unix format to
293 the list that we use internally. */
300 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
301 else if (WIFEXITED (w
))
302 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
303 WCOREDUMP (w
) ? Qt
: Qnil
));
304 else if (WIFSIGNALED (w
))
305 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
306 WCOREDUMP (w
) ? Qt
: Qnil
));
311 /* Given a status-list, extract the three pieces of information
312 and store them individually through the three pointers. */
315 decode_status (l
, symbol
, code
, coredump
)
331 *symbol
= XCONS (l
)->car
;
332 tem
= XCONS (l
)->cdr
;
333 *code
= XFASTINT (XCONS (tem
)->car
);
334 tem
= XCONS (tem
)->cdr
;
335 *coredump
= !NILP (tem
);
339 /* Return a string describing a process status list. */
342 status_message (status
)
347 Lisp_Object string
, string2
;
349 decode_status (status
, &symbol
, &code
, &coredump
);
351 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
357 /* Cast to suppress warning if the table has const char *. */
358 signame
= (char *) sys_siglist
[code
];
360 signame
= sys_errlist
[code
];
365 string
= build_string (signame
);
366 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
367 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
368 return concat2 (string
, string2
);
370 else if (EQ (symbol
, Qexit
))
373 return build_string ("finished\n");
374 string
= Fnumber_to_string (make_number (code
));
375 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
376 return concat2 (build_string ("exited abnormally with code "),
377 concat2 (string
, string2
));
380 return Fcopy_sequence (Fsymbol_name (symbol
));
385 /* Open an available pty, returning a file descriptor.
386 Return -1 on failure.
387 The file name of the terminal corresponding to the pty
388 is left in the variable pty_name. */
397 /* Some systems name their pseudoterminals so that there are gaps in
398 the usual sequence - for example, on HP9000/S700 systems, there
399 are no pseudoterminals with names ending in 'f'. So we wait for
400 three failures in a row before deciding that we've reached the
402 int failed_count
= 0;
407 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
408 for (i
= 0; i
< 16; i
++)
411 #ifdef PTY_NAME_SPRINTF
414 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
415 #endif /* no PTY_NAME_SPRINTF */
419 #else /* no PTY_OPEN */
421 /* Unusual IRIS code */
422 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
425 if (fstat (fd
, &stb
) < 0)
428 if (stat (pty_name
, &stb
) < 0)
431 if (failed_count
>= 3)
437 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
439 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
441 #endif /* not IRIS */
442 #endif /* no PTY_OPEN */
446 /* check to make certain that both sides are available
447 this avoids a nasty yet stupid bug in rlogins */
448 #ifdef PTY_TTY_NAME_SPRINTF
451 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
452 #endif /* no PTY_TTY_NAME_SPRINTF */
454 if (access (pty_name
, 6) != 0)
457 #if !defined(IRIS) && !defined(__sgi)
463 #endif /* not UNIPLUS */
470 #endif /* HAVE_PTYS */
476 struct Lisp_Vector
*vec
;
477 register Lisp_Object val
, tem
, name1
;
478 register struct Lisp_Process
*p
;
482 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
483 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
484 vec
->contents
[i
] = Qnil
;
485 vec
->size
= VECSIZE (struct Lisp_Process
);
486 p
= (struct Lisp_Process
*)vec
;
488 XSETINT (p
->infd
, -1);
489 XSETINT (p
->outfd
, -1);
490 XSETFASTINT (p
->pid
, 0);
491 XSETFASTINT (p
->tick
, 0);
492 XSETFASTINT (p
->update_tick
, 0);
493 p
->raw_status_low
= Qnil
;
494 p
->raw_status_high
= Qnil
;
496 p
->mark
= Fmake_marker ();
498 /* If name is already in use, modify it until it is unused. */
503 tem
= Fget_process (name1
);
504 if (NILP (tem
)) break;
505 sprintf (suffix
, "<%d>", i
);
506 name1
= concat2 (name
, build_string (suffix
));
510 XSETPROCESS (val
, p
);
511 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
515 remove_process (proc
)
516 register Lisp_Object proc
;
518 register Lisp_Object pair
;
520 pair
= Frassq (proc
, Vprocess_alist
);
521 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
523 deactivate_process (proc
);
526 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
527 "Return t if OBJECT is a process.")
531 return PROCESSP (object
) ? Qt
: Qnil
;
534 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
535 "Return the process named NAME, or nil if there is none.")
537 register Lisp_Object name
;
541 CHECK_STRING (name
, 0);
542 return Fcdr (Fassoc (name
, Vprocess_alist
));
545 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
546 "Return the (or, a) process associated with BUFFER.\n\
547 BUFFER may be a buffer or the name of one.")
549 register Lisp_Object buffer
;
551 register Lisp_Object buf
, tail
, proc
;
553 if (NILP (buffer
)) return Qnil
;
554 buf
= Fget_buffer (buffer
);
555 if (NILP (buf
)) return Qnil
;
557 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
559 proc
= Fcdr (Fcar (tail
));
560 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
566 /* This is how commands for the user decode process arguments. It
567 accepts a process, a process name, a buffer, a buffer name, or nil.
568 Buffers denote the first process in the buffer, and nil denotes the
573 register Lisp_Object name
;
575 register Lisp_Object proc
, obj
;
578 obj
= Fget_process (name
);
580 obj
= Fget_buffer (name
);
582 error ("Process %s does not exist", XSTRING (name
)->data
);
584 else if (NILP (name
))
585 obj
= Fcurrent_buffer ();
589 /* Now obj should be either a buffer object or a process object.
593 proc
= Fget_buffer_process (obj
);
595 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
599 CHECK_PROCESS (obj
, 0);
605 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
606 "Delete PROCESS: kill it and forget about it immediately.\n\
607 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
608 nil, indicating the current buffer's process.")
610 register Lisp_Object process
;
612 process
= get_process (process
);
613 XPROCESS (process
)->raw_status_low
= Qnil
;
614 XPROCESS (process
)->raw_status_high
= Qnil
;
615 if (NETCONN_P (process
))
617 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
618 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
620 else if (XINT (XPROCESS (process
)->infd
) >= 0)
622 Fkill_process (process
, Qnil
);
623 /* Do this now, since remove_process will make sigchld_handler do nothing. */
624 XPROCESS (process
)->status
625 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
626 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
629 remove_process (process
);
633 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
634 "Return the status of PROCESS: a symbol, one of these:\n\
635 run -- for a process that is running.\n\
636 stop -- for a process stopped but continuable.\n\
637 exit -- for a process that has exited.\n\
638 signal -- for a process that has got a fatal signal.\n\
639 open -- for a network stream connection that is open.\n\
640 closed -- for a network stream connection that is closed.\n\
641 nil -- if arg is a process name and no such process exists.\n\
642 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
643 nil, indicating the current buffer's process.")
645 register Lisp_Object process
;
647 register struct Lisp_Process
*p
;
648 register Lisp_Object status
;
650 if (STRINGP (process
))
651 process
= Fget_process (process
);
653 process
= get_process (process
);
658 p
= XPROCESS (process
);
659 if (!NILP (p
->raw_status_low
))
663 status
= XCONS (status
)->car
;
664 if (NETCONN_P (process
))
666 if (EQ (status
, Qrun
))
668 else if (EQ (status
, Qexit
))
674 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
676 "Return the exit status of PROCESS or the signal number that killed it.\n\
677 If PROCESS has not yet exited or died, return 0.")
679 register Lisp_Object process
;
681 CHECK_PROCESS (process
, 0);
682 if (!NILP (XPROCESS (process
)->raw_status_low
))
683 update_status (XPROCESS (process
));
684 if (CONSP (XPROCESS (process
)->status
))
685 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
686 return make_number (0);
689 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
690 "Return the process id of PROCESS.\n\
691 This is the pid of the Unix process which PROCESS uses or talks to.\n\
692 For a network connection, this value is nil.")
694 register Lisp_Object process
;
696 CHECK_PROCESS (process
, 0);
697 return XPROCESS (process
)->pid
;
700 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
701 "Return the name of PROCESS, as a string.\n\
702 This is the name of the program invoked in PROCESS,\n\
703 possibly modified to make it unique among process names.")
705 register Lisp_Object process
;
707 CHECK_PROCESS (process
, 0);
708 return XPROCESS (process
)->name
;
711 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
712 "Return the command that was executed to start PROCESS.\n\
713 This is a list of strings, the first string being the program executed\n\
714 and the rest of the strings being the arguments given to it.\n\
715 For a non-child channel, this is nil.")
717 register Lisp_Object process
;
719 CHECK_PROCESS (process
, 0);
720 return XPROCESS (process
)->command
;
723 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
724 "Return the name of the terminal PROCESS uses, or nil if none.\n\
725 This is the terminal that the process itself reads and writes on,\n\
726 not the name of the pty that Emacs uses to talk with that terminal.")
728 register Lisp_Object process
;
730 CHECK_PROCESS (process
, 0);
731 return XPROCESS (process
)->tty_name
;
734 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
736 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
738 register Lisp_Object process
, buffer
;
740 CHECK_PROCESS (process
, 0);
742 CHECK_BUFFER (buffer
, 1);
743 XPROCESS (process
)->buffer
= buffer
;
747 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
749 "Return the buffer PROCESS is associated with.\n\
750 Output from PROCESS is inserted in this buffer\n\
751 unless PROCESS has a filter.")
753 register Lisp_Object process
;
755 CHECK_PROCESS (process
, 0);
756 return XPROCESS (process
)->buffer
;
759 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
761 "Return the marker for the end of the last output from PROCESS.")
763 register Lisp_Object process
;
765 CHECK_PROCESS (process
, 0);
766 return XPROCESS (process
)->mark
;
769 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
771 "Give PROCESS the filter function FILTER; nil means no filter.\n\
772 t means stop accepting output from the process.\n\
773 When a process has a filter, each time it does output\n\
774 the entire string of output is passed to the filter.\n\
775 The filter gets two arguments: the process and the string of output.\n\
776 If the process has a filter, its buffer is not used for output.")
778 register Lisp_Object process
, filter
;
780 CHECK_PROCESS (process
, 0);
783 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
784 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
786 else if (EQ (XPROCESS (process
)->filter
, Qt
))
788 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
789 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
791 XPROCESS (process
)->filter
= filter
;
795 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
797 "Returns the filter function of PROCESS; nil if none.\n\
798 See `set-process-filter' for more info on filter functions.")
800 register Lisp_Object process
;
802 CHECK_PROCESS (process
, 0);
803 return XPROCESS (process
)->filter
;
806 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
808 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
809 The sentinel is called as a function when the process changes state.\n\
810 It gets two arguments: the process, and a string describing the change.")
812 register Lisp_Object process
, sentinel
;
814 CHECK_PROCESS (process
, 0);
815 XPROCESS (process
)->sentinel
= sentinel
;
819 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
821 "Return the sentinel of PROCESS; nil if none.\n\
822 See `set-process-sentinel' for more info on sentinels.")
824 register Lisp_Object process
;
826 CHECK_PROCESS (process
, 0);
827 return XPROCESS (process
)->sentinel
;
830 DEFUN ("set-process-window-size", Fset_process_window_size
,
831 Sset_process_window_size
, 3, 3, 0,
832 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
833 (process
, height
, width
)
834 register Lisp_Object process
, height
, width
;
836 CHECK_PROCESS (process
, 0);
837 CHECK_NATNUM (height
, 0);
838 CHECK_NATNUM (width
, 0);
839 if (set_window_size (XINT (XPROCESS (process
)->infd
),
840 XINT (height
), XINT(width
)) <= 0)
846 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
847 Sprocess_kill_without_query
, 1, 2, 0,
848 "Say no query needed if PROCESS is running when Emacs is exited.\n\
849 Optional second argument if non-nil says to require a query.\n\
850 Value is t if a query was formerly required.")
852 register Lisp_Object process
, value
;
856 CHECK_PROCESS (process
, 0);
857 tem
= XPROCESS (process
)->kill_without_query
;
858 XPROCESS (process
)->kill_without_query
= Fnull (value
);
863 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
865 "Return the contact info of PROCESS; t for a real child.\n\
866 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
868 register Lisp_Object process
;
870 CHECK_PROCESS (process
, 0);
871 return XPROCESS (process
)->childp
;
874 #if 0 /* Turned off because we don't currently record this info
875 in the process. Perhaps add it. */
876 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
877 "Return the connection type of `PROCESS'.\n\
878 The value is `nil' for a pipe,\n\
879 `t' or `pty' for a pty, or `stream' for a socket connection.")
883 return XPROCESS (process
)->type
;
890 register Lisp_Object tail
, tem
;
891 Lisp_Object proc
, minspace
, tem1
;
892 register struct buffer
*old
= current_buffer
;
893 register struct Lisp_Process
*p
;
897 XSETFASTINT (minspace
, 1);
899 set_buffer_internal (XBUFFER (Vstandard_output
));
900 Fbuffer_disable_undo (Vstandard_output
);
902 current_buffer
->truncate_lines
= Qt
;
905 Proc Status Buffer Tty Command\n\
906 ---- ------ ------ --- -------\n", -1);
908 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
912 proc
= Fcdr (Fcar (tail
));
914 if (NILP (p
->childp
))
917 Finsert (1, &p
->name
);
918 Findent_to (make_number (13), minspace
);
920 if (!NILP (p
->raw_status_low
))
923 if (CONSP (p
->status
))
924 symbol
= XCONS (p
->status
)->car
;
927 if (EQ (symbol
, Qsignal
))
930 tem
= Fcar (Fcdr (p
->status
));
932 if (XINT (tem
) < NSIG
)
933 write_string (sys_errlist
[XINT (tem
)], -1);
936 Fprinc (symbol
, Qnil
);
938 else if (NETCONN_P (proc
))
940 if (EQ (symbol
, Qrun
))
941 write_string ("open", -1);
942 else if (EQ (symbol
, Qexit
))
943 write_string ("closed", -1);
945 Fprinc (symbol
, Qnil
);
948 Fprinc (symbol
, Qnil
);
950 if (EQ (symbol
, Qexit
))
953 tem
= Fcar (Fcdr (p
->status
));
956 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
957 write_string (tembuf
, -1);
961 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
962 remove_process (proc
);
964 Findent_to (make_number (22), minspace
);
965 if (NILP (p
->buffer
))
966 insert_string ("(none)");
967 else if (NILP (XBUFFER (p
->buffer
)->name
))
968 insert_string ("(Killed)");
970 Finsert (1, &XBUFFER (p
->buffer
)->name
);
972 Findent_to (make_number (37), minspace
);
974 if (STRINGP (p
->tty_name
))
975 Finsert (1, &p
->tty_name
);
977 insert_string ("(none)");
979 Findent_to (make_number (49), minspace
);
981 if (NETCONN_P (proc
))
983 sprintf (tembuf
, "(network stream connection to %s)\n",
984 XSTRING (XCONS (p
->childp
)->car
)->data
);
985 insert_string (tembuf
);
999 insert_string ("\n");
1005 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
1006 "Display a list of all processes.\n\
1007 \(Any processes listed as Exited or Signaled are actually eliminated\n\
1008 after the listing is made.)")
1011 internal_with_output_to_temp_buffer ("*Process List*",
1012 list_processes_1
, Qnil
);
1016 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1017 "Return a list of all processes.")
1020 return Fmapcar (Qcdr
, Vprocess_alist
);
1023 /* Starting asynchronous inferior processes. */
1025 static Lisp_Object
start_process_unwind ();
1027 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1028 "Start a program in a subprocess. Return the process object for it.\n\
1029 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1030 NAME is name for process. It is modified if necessary to make it unique.\n\
1031 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1032 Process output goes at end of that buffer, unless you specify\n\
1033 an output stream or filter function to handle the output.\n\
1034 BUFFER may be also nil, meaning that this process is not associated\n\
1036 Third arg is program file name. It is searched for as in the shell.\n\
1037 Remaining arguments are strings to give program as arguments.")
1040 register Lisp_Object
*args
;
1042 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1044 register unsigned char *new_argv
;
1047 register unsigned char **new_argv
;
1050 int count
= specpdl_ptr
- specpdl
;
1054 buffer
= Fget_buffer_create (buffer
);
1056 /* Make sure that the child will be able to chdir to the current
1057 buffer's current directory, or its unhandled equivalent. We
1058 can't just have the child check for an error when it does the
1059 chdir, since it's in a vfork.
1061 We have to GCPRO around this because Fexpand_file_name and
1062 Funhandled_file_name_directory might call a file name handling
1063 function. The argument list is protected by the caller, so all
1064 we really have to worry about is buffer. */
1066 struct gcpro gcpro1
, gcpro2
;
1068 current_dir
= current_buffer
->directory
;
1070 GCPRO2 (buffer
, current_dir
);
1073 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1075 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1076 report_file_error ("Setting current directory",
1077 Fcons (current_buffer
->directory
, Qnil
));
1083 CHECK_STRING (name
, 0);
1087 CHECK_STRING (program
, 2);
1090 /* Make a one member argv with all args concatenated
1091 together separated by a blank. */
1092 len
= XSTRING (program
)->size_byte
+ 2;
1093 for (i
= 3; i
< nargs
; i
++)
1096 CHECK_STRING (tem
, i
);
1097 len
+= XSTRING (tem
)->size_byte
+ 1; /* count the blank */
1099 new_argv
= (unsigned char *) alloca (len
);
1100 strcpy (new_argv
, XSTRING (program
)->data
);
1101 for (i
= 3; i
< nargs
; i
++)
1104 CHECK_STRING (tem
, i
);
1105 strcat (new_argv
, " ");
1106 strcat (new_argv
, XSTRING (tem
)->data
);
1108 /* Need to add code here to check for program existence on VMS */
1111 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1113 /* If program file name is not absolute, search our path for it */
1114 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1115 && !(XSTRING (program
)->size
> 1
1116 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1118 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1121 GCPRO4 (name
, program
, buffer
, current_dir
);
1122 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1125 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1126 tem
= Fexpand_file_name (tem
, Qnil
);
1127 new_argv
[0] = XSTRING (tem
)->data
;
1131 if (!NILP (Ffile_directory_p (program
)))
1132 error ("Specified program for new process is a directory");
1134 new_argv
[0] = XSTRING (program
)->data
;
1137 for (i
= 3; i
< nargs
; i
++)
1140 CHECK_STRING (tem
, i
);
1141 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1143 new_argv
[i
- 2] = 0;
1144 #endif /* not VMS */
1146 proc
= make_process (name
);
1147 /* If an error occurs and we can't start the process, we want to
1148 remove it from the process list. This means that each error
1149 check in create_process doesn't need to call remove_process
1150 itself; it's all taken care of here. */
1151 record_unwind_protect (start_process_unwind
, proc
);
1153 XPROCESS (proc
)->childp
= Qt
;
1154 XPROCESS (proc
)->command_channel_p
= Qnil
;
1155 XPROCESS (proc
)->buffer
= buffer
;
1156 XPROCESS (proc
)->sentinel
= Qnil
;
1157 XPROCESS (proc
)->filter
= Qnil
;
1158 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1160 /* Make the process marker point into the process buffer (if any). */
1162 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1163 BUF_ZV (XBUFFER (buffer
)),
1164 BUF_ZV_BYTE (XBUFFER (buffer
)));
1166 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1167 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1169 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1170 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1174 /* Setup coding systems for communicating with the process. */
1175 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1176 Lisp_Object coding_systems
= Qt
;
1177 Lisp_Object val
, *args2
;
1178 struct gcpro gcpro1
;
1180 if (!NILP (Vcoding_system_for_read
))
1181 val
= Vcoding_system_for_read
;
1182 else if (NILP (current_buffer
->enable_multibyte_characters
))
1186 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1187 args2
[0] = Qstart_process
;
1188 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1190 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1192 if (CONSP (coding_systems
))
1193 val
= XCONS (coding_systems
)->car
;
1194 else if (CONSP (Vdefault_process_coding_system
))
1195 val
= XCONS (Vdefault_process_coding_system
)->car
;
1199 XPROCESS (proc
)->decode_coding_system
= val
;
1201 if (!NILP (Vcoding_system_for_write
))
1202 val
= Vcoding_system_for_write
;
1203 else if (NILP (current_buffer
->enable_multibyte_characters
))
1207 if (EQ (coding_systems
, Qt
))
1209 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1210 args2
[0] = Qstart_process
;
1211 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1214 Ffind_operation_coding_system (nargs
+ 1, args2
);
1217 if (CONSP (coding_systems
))
1218 val
= XCONS (coding_systems
)->cdr
;
1219 else if (CONSP (Vdefault_process_coding_system
))
1220 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
1224 XPROCESS (proc
)->encode_coding_system
= val
;
1227 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1228 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1229 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1230 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1232 create_process (proc
, (char **) new_argv
, current_dir
);
1234 return unbind_to (count
, proc
);
1237 /* This function is the unwind_protect form for Fstart_process. If
1238 PROC doesn't have its pid set, then we know someone has signaled
1239 an error and the process wasn't started successfully, so we should
1240 remove it from the process list. */
1242 start_process_unwind (proc
)
1245 if (!PROCESSP (proc
))
1248 /* Was PROC started successfully? */
1249 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1250 remove_process (proc
);
1257 create_process_1 (signo
)
1260 #if defined (USG) && !defined (POSIX_SIGNALS)
1261 /* USG systems forget handlers when they are used;
1262 must reestablish each time */
1263 signal (signo
, create_process_1
);
1267 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1270 /* Mimic blocking of signals on system V, which doesn't really have it. */
1272 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1273 int sigchld_deferred
;
1276 create_process_sigchld ()
1278 signal (SIGCHLD
, create_process_sigchld
);
1280 sigchld_deferred
= 1;
1286 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1288 create_process (process
, new_argv
, current_dir
)
1289 Lisp_Object process
;
1291 Lisp_Object current_dir
;
1293 int pid
, inchannel
, outchannel
;
1295 #ifdef POSIX_SIGNALS
1298 struct sigaction sigint_action
;
1299 struct sigaction sigquit_action
;
1301 struct sigaction sighup_action
;
1303 #else /* !POSIX_SIGNALS */
1305 SIGTYPE (*sigchld
)();
1307 #endif /* !POSIX_SIGNALS */
1308 /* Use volatile to protect variables from being clobbered by longjmp. */
1309 volatile int forkin
, forkout
;
1310 volatile int pty_flag
= 0;
1311 extern char **environ
;
1313 inchannel
= outchannel
= -1;
1316 if (!NILP (Vprocess_connection_type
))
1317 outchannel
= inchannel
= allocate_pty ();
1322 /* On USG systems it does not work to open the pty's tty here
1323 and then close and reopen it in the child. */
1325 /* Don't let this terminal become our controlling terminal
1326 (in case we don't have one). */
1327 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1329 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1332 report_file_error ("Opening pty", Qnil
);
1334 forkin
= forkout
= -1;
1335 #endif /* not USG */
1339 #endif /* HAVE_PTYS */
1342 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1343 report_file_error ("Opening socketpair", Qnil
);
1344 outchannel
= inchannel
= sv
[0];
1345 forkout
= forkin
= sv
[1];
1347 #else /* not SKTPAIR */
1356 #endif /* not SKTPAIR */
1359 /* Replaced by close_process_descs */
1360 set_exclusive_use (inchannel
);
1361 set_exclusive_use (outchannel
);
1364 /* Stride people say it's a mystery why this is needed
1365 as well as the O_NDELAY, but that it fails without this. */
1366 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1369 ioctl (inchannel
, FIONBIO
, &one
);
1374 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1375 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1378 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1379 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1383 /* Record this as an active process, with its channels.
1384 As a result, child_setup will close Emacs's side of the pipes. */
1385 chan_process
[inchannel
] = process
;
1386 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1387 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1388 /* Record the tty descriptor used in the subprocess. */
1390 XPROCESS (process
)->subtty
= Qnil
;
1392 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1393 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1394 XPROCESS (process
)->status
= Qrun
;
1395 if (!proc_decode_coding_system
[inchannel
])
1396 proc_decode_coding_system
[inchannel
]
1397 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1398 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1399 proc_decode_coding_system
[inchannel
]);
1400 if (!proc_encode_coding_system
[outchannel
])
1401 proc_encode_coding_system
[outchannel
]
1402 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1403 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1404 proc_encode_coding_system
[outchannel
]);
1406 if (CODING_REQUIRE_ENCODING (proc_encode_coding_system
[outchannel
]))
1408 /* Here we encode arguments by the coding system used for
1409 sending data to the process. We don't support using
1410 different coding systems for encoding arguments and for
1411 encoding data sent to the process. */
1412 struct gcpro gcpro1
;
1414 struct coding_system
*coding
= proc_encode_coding_system
[outchannel
];
1416 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
1418 while (new_argv
[i
] != 0)
1420 int len
= strlen (new_argv
[i
]);
1421 int size
= encoding_buffer_size (coding
, len
);
1422 unsigned char *buf
= (unsigned char *) alloca (size
);
1424 encode_coding (coding
, new_argv
[i
], buf
, len
, size
);
1425 buf
[coding
->produced
] = 0;
1426 /* We don't have to free new_argv[i] because it points to a
1427 Lisp string given as an argument to `start-process'. */
1428 new_argv
[i
++] = buf
;
1431 coding
->mode
&= ~CODING_MODE_LAST_BLOCK
;
1434 /* Delay interrupts until we have a chance to store
1435 the new fork's pid in its process structure */
1436 #ifdef POSIX_SIGNALS
1437 sigemptyset (&blocked
);
1439 sigaddset (&blocked
, SIGCHLD
);
1442 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1443 this sets the parent's signal handlers as well as the child's.
1444 So delay all interrupts whose handlers the child might munge,
1445 and record the current handlers so they can be restored later. */
1446 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1447 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1449 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1451 #endif /* HAVE_VFORK */
1452 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1453 #else /* !POSIX_SIGNALS */
1457 #else /* not BSD4_1 */
1458 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1459 sigsetmask (sigmask (SIGCHLD
));
1460 #else /* ordinary USG */
1462 sigchld_deferred
= 0;
1463 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1465 #endif /* ordinary USG */
1466 #endif /* not BSD4_1 */
1467 #endif /* SIGCHLD */
1468 #endif /* !POSIX_SIGNALS */
1470 FD_SET (inchannel
, &input_wait_mask
);
1471 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1472 if (inchannel
> max_process_desc
)
1473 max_process_desc
= inchannel
;
1475 /* Until we store the proper pid, enable sigchld_handler
1476 to recognize an unknown pid as standing for this process.
1477 It is very important not to let this `marker' value stay
1478 in the table after this function has returned; if it does
1479 it might cause call-process to hang and subsequent asynchronous
1480 processes to get their return values scrambled. */
1481 XSETINT (XPROCESS (process
)->pid
, -1);
1486 /* child_setup must clobber environ on systems with true vfork.
1487 Protect it from permanent change. */
1488 char **save_environ
= environ
;
1491 = Fencode_coding_string (current_dir
, Vfile_name_coding_system
, Qt
);
1496 #endif /* not WINDOWSNT */
1498 int xforkin
= forkin
;
1499 int xforkout
= forkout
;
1501 #if 0 /* This was probably a mistake--it duplicates code later on,
1502 but fails to handle all the cases. */
1503 /* Make sure SIGCHLD is not blocked in the child. */
1504 sigsetmask (SIGEMPTYMASK
);
1507 /* Make the pty be the controlling terminal of the process. */
1509 /* First, disconnect its current controlling terminal. */
1511 /* We tried doing setsid only if pty_flag, but it caused
1512 process_set_signal to fail on SGI when using a pipe. */
1514 /* Make the pty's terminal the controlling terminal. */
1518 /* We ignore the return value
1519 because faith@cs.unc.edu says that is necessary on Linux. */
1520 ioctl (xforkin
, TIOCSCTTY
, 0);
1523 #else /* not HAVE_SETSID */
1525 /* It's very important to call setpgrp here and no time
1526 afterwards. Otherwise, we lose our controlling tty which
1527 is set when we open the pty. */
1530 #endif /* not HAVE_SETSID */
1531 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1532 if (pty_flag
&& xforkin
>= 0)
1535 tcgetattr (xforkin
, &t
);
1537 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1538 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1541 #if defined (NTTYDISC) && defined (TIOCSETD)
1542 if (pty_flag
&& xforkin
>= 0)
1544 /* Use new line discipline. */
1545 int ldisc
= NTTYDISC
;
1546 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1551 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1552 can do TIOCSPGRP only to the process's controlling tty. */
1555 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1556 I can't test it since I don't have 4.3. */
1557 int j
= open ("/dev/tty", O_RDWR
, 0);
1558 ioctl (j
, TIOCNOTTY
, 0);
1561 /* In order to get a controlling terminal on some versions
1562 of BSD, it is necessary to put the process in pgrp 0
1563 before it opens the terminal. */
1571 #endif /* TIOCNOTTY */
1573 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1574 /*** There is a suggestion that this ought to be a
1575 conditional on TIOCSPGRP,
1576 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1577 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1578 that system does seem to need this code, even though
1579 both HAVE_SETSID and TIOCSCTTY are defined. */
1580 /* Now close the pty (if we had it open) and reopen it.
1581 This makes the pty the controlling terminal of the subprocess. */
1584 #ifdef SET_CHILD_PTY_PGRP
1585 int pgrp
= getpid ();
1588 /* I wonder if close (open (pty_name, ...)) would work? */
1591 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1595 write (1, "Couldn't open the pty terminal ", 31);
1596 write (1, pty_name
, strlen (pty_name
));
1601 #ifdef SET_CHILD_PTY_PGRP
1602 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1603 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1606 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1608 #ifdef SETUP_SLAVE_PTY
1613 #endif /* SETUP_SLAVE_PTY */
1615 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1616 Now reenable it in the child, so it will die when we want it to. */
1618 signal (SIGHUP
, SIG_DFL
);
1620 #endif /* HAVE_PTYS */
1622 signal (SIGINT
, SIG_DFL
);
1623 signal (SIGQUIT
, SIG_DFL
);
1625 /* Stop blocking signals in the child. */
1626 #ifdef POSIX_SIGNALS
1627 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1628 #else /* !POSIX_SIGNALS */
1632 #else /* not BSD4_1 */
1633 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1634 sigsetmask (SIGEMPTYMASK
);
1635 #else /* ordinary USG */
1637 signal (SIGCHLD
, sigchld
);
1639 #endif /* ordinary USG */
1640 #endif /* not BSD4_1 */
1641 #endif /* SIGCHLD */
1642 #endif /* !POSIX_SIGNALS */
1645 child_setup_tty (xforkout
);
1647 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1648 new_argv
, 1, current_dir
);
1649 #else /* not WINDOWSNT */
1650 child_setup (xforkin
, xforkout
, xforkout
,
1651 new_argv
, 1, current_dir
);
1652 #endif /* not WINDOWSNT */
1654 environ
= save_environ
;
1659 /* This runs in the Emacs process. */
1664 if (forkin
!= forkout
&& forkout
>= 0)
1669 /* vfork succeeded. */
1670 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1673 register_child (pid
, inchannel
);
1674 #endif /* WINDOWSNT */
1676 /* If the subfork execv fails, and it exits,
1677 this close hangs. I don't know why.
1678 So have an interrupt jar it loose. */
1680 signal (SIGALRM
, create_process_1
);
1682 XPROCESS (process
)->subtty
= Qnil
;
1687 if (forkin
!= forkout
&& forkout
>= 0)
1692 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1695 XPROCESS (process
)->tty_name
= Qnil
;
1698 /* Restore the signal state whether vfork succeeded or not.
1699 (We will signal an error, below, if it failed.) */
1700 #ifdef POSIX_SIGNALS
1702 /* Restore the parent's signal handlers. */
1703 sigaction (SIGINT
, &sigint_action
, 0);
1704 sigaction (SIGQUIT
, &sigquit_action
, 0);
1706 sigaction (SIGHUP
, &sighup_action
, 0);
1708 #endif /* HAVE_VFORK */
1709 /* Stop blocking signals in the parent. */
1710 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1711 #else /* !POSIX_SIGNALS */
1715 #else /* not BSD4_1 */
1716 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1717 sigsetmask (SIGEMPTYMASK
);
1718 #else /* ordinary USG */
1720 signal (SIGCHLD
, sigchld
);
1721 /* Now really handle any of these signals
1722 that came in during this function. */
1723 if (sigchld_deferred
)
1724 kill (getpid (), SIGCHLD
);
1726 #endif /* ordinary USG */
1727 #endif /* not BSD4_1 */
1728 #endif /* SIGCHLD */
1729 #endif /* !POSIX_SIGNALS */
1731 /* Now generate the error if vfork failed. */
1733 report_file_error ("Doing vfork", Qnil
);
1735 #endif /* not VMS */
1739 /* open a TCP network connection to a given HOST/SERVICE. Treated
1740 exactly like a normal process when reading and writing. Only
1741 differences are in status display and process deletion. A network
1742 connection has no PID; you cannot signal it. All you can do is
1743 deactivate and close it via delete-process */
1745 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1747 "Open a TCP connection for a service to a host.\n\
1748 Returns a subprocess-object to represent the connection.\n\
1749 Input and output work as for subprocesses; `delete-process' closes it.\n\
1750 Args are NAME BUFFER HOST SERVICE.\n\
1751 NAME is name for process. It is modified if necessary to make it unique.\n\
1752 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1753 Process output goes at end of that buffer, unless you specify\n\
1754 an output stream or filter function to handle the output.\n\
1755 BUFFER may be also nil, meaning that this process is not associated\n\
1757 Third arg is name of the host to connect to, or its IP address.\n\
1758 Fourth arg SERVICE is name of the service desired, or an integer\n\
1759 specifying a port number to connect to.")
1760 (name
, buffer
, host
, service
)
1761 Lisp_Object name
, buffer
, host
, service
;
1765 struct sockaddr_in address
;
1766 struct servent
*svc_info
;
1767 struct hostent
*host_info_ptr
, host_info
;
1768 char *(addr_list
[2]);
1769 IN_ADDR numeric_addr
;
1773 struct hostent host_info_fixed
;
1774 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1776 int count
= specpdl_ptr
- specpdl
;
1779 /* Ensure socket support is loaded if available. */
1780 init_winsock (TRUE
);
1783 GCPRO4 (name
, buffer
, host
, service
);
1784 CHECK_STRING (name
, 0);
1785 CHECK_STRING (host
, 0);
1786 if (INTEGERP (service
))
1787 port
= htons ((unsigned short) XINT (service
));
1790 CHECK_STRING (service
, 0);
1791 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1793 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1794 port
= svc_info
->s_port
;
1797 /* Slow down polling to every ten seconds.
1798 Some kernels have a bug which causes retrying connect to fail
1799 after a connect. Polling can interfere with gethostbyname too. */
1800 #ifdef POLL_FOR_INPUT
1801 bind_polling_period (10);
1812 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1815 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1818 Fsleep_for (make_number (1), Qnil
);
1820 if (host_info_ptr
== 0)
1821 /* Attempt to interpret host as numeric inet address */
1823 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1824 if (NUMERIC_ADDR_ERROR
)
1825 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1827 host_info_ptr
= &host_info
;
1828 host_info
.h_name
= 0;
1829 host_info
.h_aliases
= 0;
1830 host_info
.h_addrtype
= AF_INET
;
1832 /* Older machines have only one address slot called h_addr.
1833 Newer machines have h_addr_list, but #define h_addr to
1834 be its first element. */
1835 host_info
.h_addr_list
= &(addr_list
[0]);
1837 host_info
.h_addr
= (char*)(&numeric_addr
);
1839 /* numeric_addr isn't null-terminated; it has fixed length. */
1840 host_info
.h_length
= sizeof (numeric_addr
);
1843 bzero (&address
, sizeof address
);
1844 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1845 host_info_ptr
->h_length
);
1846 address
.sin_family
= host_info_ptr
->h_addrtype
;
1847 address
.sin_port
= port
;
1849 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1851 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1853 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1854 when connect is interrupted. So let's not let it get interrupted.
1855 Note we do not turn off polling, because polling is only used
1856 when not interrupt_input, and thus not normally used on the systems
1857 which have this bug. On systems which use polling, there's no way
1858 to quit if polling is turned off. */
1859 if (interrupt_input
)
1867 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1868 && errno
!= EISCONN
)
1876 if (errno
== EADDRINUSE
&& retry
< 20)
1878 /* A delay here is needed on some FreeBSD systems,
1879 and it is harmless, since this retrying takes time anyway
1880 and should be infrequent. */
1881 Fsleep_for (make_number (1), Qnil
);
1888 if (interrupt_input
)
1892 report_file_error ("connection failed",
1893 Fcons (host
, Fcons (name
, Qnil
)));
1898 #ifdef POLL_FOR_INPUT
1899 unbind_to (count
, Qnil
);
1902 if (interrupt_input
)
1906 s
= connect_server (0);
1908 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1909 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1910 send_command (s
, C_DUMB
, 1, 0);
1917 buffer
= Fget_buffer_create (buffer
);
1918 proc
= make_process (name
);
1920 chan_process
[inch
] = proc
;
1923 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1926 fcntl (inch
, F_SETFL
, O_NDELAY
);
1930 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1931 XPROCESS (proc
)->command_channel_p
= Qnil
;
1932 XPROCESS (proc
)->buffer
= buffer
;
1933 XPROCESS (proc
)->sentinel
= Qnil
;
1934 XPROCESS (proc
)->filter
= Qnil
;
1935 XPROCESS (proc
)->command
= Qnil
;
1936 XPROCESS (proc
)->pid
= Qnil
;
1937 XSETINT (XPROCESS (proc
)->infd
, inch
);
1938 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1939 XPROCESS (proc
)->status
= Qrun
;
1940 FD_SET (inch
, &input_wait_mask
);
1941 FD_SET (inch
, &non_keyboard_wait_mask
);
1942 if (inch
> max_process_desc
)
1943 max_process_desc
= inch
;
1945 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1946 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1948 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1949 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1953 /* Setup coding systems for communicating with the network stream. */
1954 struct gcpro gcpro1
;
1955 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1956 Lisp_Object coding_systems
= Qt
;
1957 Lisp_Object args
[5], val
;
1959 if (!NILP (Vcoding_system_for_read
))
1960 val
= Vcoding_system_for_read
;
1961 else if (NILP (current_buffer
->enable_multibyte_characters
))
1962 /* We dare not decode end-of-line format by setting VAL to
1963 Qraw_text, because the existing Emacs Lisp libraries
1964 assume that they receive bare code including a sequene of
1969 args
[0] = Qopen_network_stream
, args
[1] = name
,
1970 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1972 coding_systems
= Ffind_operation_coding_system (5, args
);
1974 if (CONSP (coding_systems
))
1975 val
= XCONS (coding_systems
)->car
;
1976 else if (CONSP (Vdefault_process_coding_system
))
1977 val
= XCONS (Vdefault_process_coding_system
)->car
;
1981 XPROCESS (proc
)->decode_coding_system
= val
;
1983 if (!NILP (Vcoding_system_for_write
))
1984 val
= Vcoding_system_for_write
;
1985 else if (NILP (current_buffer
->enable_multibyte_characters
))
1989 if (EQ (coding_systems
, Qt
))
1991 args
[0] = Qopen_network_stream
, args
[1] = name
,
1992 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1994 coding_systems
= Ffind_operation_coding_system (5, args
);
1997 if (CONSP (coding_systems
))
1998 val
= XCONS (coding_systems
)->cdr
;
1999 else if (CONSP (Vdefault_process_coding_system
))
2000 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
2004 XPROCESS (proc
)->encode_coding_system
= val
;
2007 if (!proc_decode_coding_system
[inch
])
2008 proc_decode_coding_system
[inch
]
2009 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2010 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
2011 proc_decode_coding_system
[inch
]);
2012 if (!proc_encode_coding_system
[outch
])
2013 proc_encode_coding_system
[outch
]
2014 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2015 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
2016 proc_encode_coding_system
[outch
]);
2018 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
2019 XPROCESS (proc
)->decoding_carryover
= make_number (0);
2020 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
2021 XPROCESS (proc
)->encoding_carryover
= make_number (0);
2026 #endif /* HAVE_SOCKETS */
2029 deactivate_process (proc
)
2032 register int inchannel
, outchannel
;
2033 register struct Lisp_Process
*p
= XPROCESS (proc
);
2035 inchannel
= XINT (p
->infd
);
2036 outchannel
= XINT (p
->outfd
);
2040 /* Beware SIGCHLD hereabouts. */
2041 flush_pending_output (inchannel
);
2044 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
2045 sys$
dassgn (outchannel
);
2046 vs
= get_vms_process_pointer (p
->pid
);
2048 give_back_vms_process_stuff (vs
);
2052 if (outchannel
>= 0 && outchannel
!= inchannel
)
2056 XSETINT (p
->infd
, -1);
2057 XSETINT (p
->outfd
, -1);
2058 chan_process
[inchannel
] = Qnil
;
2059 FD_CLR (inchannel
, &input_wait_mask
);
2060 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
2061 if (inchannel
== max_process_desc
)
2064 /* We just closed the highest-numbered process input descriptor,
2065 so recompute the highest-numbered one now. */
2066 max_process_desc
= 0;
2067 for (i
= 0; i
< MAXDESC
; i
++)
2068 if (!NILP (chan_process
[i
]))
2069 max_process_desc
= i
;
2074 /* Close all descriptors currently in use for communication
2075 with subprocess. This is used in a newly-forked subprocess
2076 to get rid of irrelevant descriptors. */
2079 close_process_descs ()
2083 for (i
= 0; i
< MAXDESC
; i
++)
2085 Lisp_Object process
;
2086 process
= chan_process
[i
];
2087 if (!NILP (process
))
2089 int in
= XINT (XPROCESS (process
)->infd
);
2090 int out
= XINT (XPROCESS (process
)->outfd
);
2093 if (out
>= 0 && in
!= out
)
2100 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2102 "Allow any pending output from subprocesses to be read by Emacs.\n\
2103 It is read into the process' buffers or given to their filter functions.\n\
2104 Non-nil arg PROCESS means do not return until some output has been received\n\
2106 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2107 seconds and microseconds to wait; return after that much time whether\n\
2108 or not there is input.\n\
2109 Return non-nil iff we received any output before the timeout expired.")
2110 (process
, timeout
, timeout_msecs
)
2111 register Lisp_Object process
, timeout
, timeout_msecs
;
2116 if (! NILP (timeout_msecs
))
2118 CHECK_NUMBER (timeout_msecs
, 2);
2119 useconds
= XINT (timeout_msecs
);
2120 if (!INTEGERP (timeout
))
2121 XSETINT (timeout
, 0);
2124 int carry
= useconds
/ 1000000;
2126 XSETINT (timeout
, XINT (timeout
) + carry
);
2127 useconds
-= carry
* 1000000;
2129 /* I think this clause is necessary because C doesn't
2130 guarantee a particular rounding direction for negative
2134 XSETINT (timeout
, XINT (timeout
) - 1);
2135 useconds
+= 1000000;
2142 if (! NILP (timeout
))
2144 CHECK_NUMBER (timeout
, 1);
2145 seconds
= XINT (timeout
);
2146 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2158 XSETFASTINT (process
, 0);
2161 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2165 /* This variable is different from waiting_for_input in keyboard.c.
2166 It is used to communicate to a lisp process-filter/sentinel (via the
2167 function Fwaiting_for_user_input_p below) whether emacs was waiting
2168 for user-input when that process-filter was called.
2169 waiting_for_input cannot be used as that is by definition 0 when
2170 lisp code is being evalled.
2171 This is also used in record_asynch_buffer_change.
2172 For that purpose, this must be 0
2173 when not inside wait_reading_process_input. */
2174 static int waiting_for_user_input_p
;
2176 /* This is here so breakpoints can be put on it. */
2178 wait_reading_process_input_1 ()
2182 /* Read and dispose of subprocess output while waiting for timeout to
2183 elapse and/or keyboard input to be available.
2186 timeout in seconds, or
2187 zero for no limit, or
2188 -1 means gobble data immediately available but don't wait for any.
2191 an additional duration to wait, measured in microseconds.
2192 If this is nonzero and time_limit is 0, then the timeout
2193 consists of MICROSECS only.
2195 READ_KBD is a lisp value:
2196 0 to ignore keyboard input, or
2197 1 to return when input is available, or
2198 -1 meaning caller will actually read the input, so don't throw to
2199 the quit handler, or
2200 a cons cell, meaning wait until its car is non-nil
2201 (and gobble terminal input into the buffer if any arrives), or
2202 a process object, meaning wait until something arrives from that
2203 process. The return value is true iff we read some input from
2206 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2207 output that arrives.
2209 If READ_KBD is a pointer to a struct Lisp_Process, then the
2210 function returns true iff we received input from that process
2211 before the timeout elapsed.
2212 Otherwise, return true iff we received input from any process. */
2214 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2215 int time_limit
, microsecs
;
2216 Lisp_Object read_kbd
;
2219 register int channel
, nfds
, m
;
2220 static SELECT_TYPE Available
;
2223 EMACS_TIME timeout
, end_time
, garbage
;
2225 int wait_channel
= -1;
2226 struct Lisp_Process
*wait_proc
= 0;
2227 int got_some_input
= 0;
2228 Lisp_Object
*wait_for_cell
= 0;
2230 FD_ZERO (&Available
);
2232 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2234 if (PROCESSP (read_kbd
))
2236 wait_proc
= XPROCESS (read_kbd
);
2237 wait_channel
= XINT (wait_proc
->infd
);
2238 XSETFASTINT (read_kbd
, 0);
2241 /* If waiting for non-nil in a cell, record where. */
2242 if (CONSP (read_kbd
))
2244 wait_for_cell
= &XCONS (read_kbd
)->car
;
2245 XSETFASTINT (read_kbd
, 0);
2248 waiting_for_user_input_p
= XINT (read_kbd
);
2250 /* Since we may need to wait several times,
2251 compute the absolute time to return at. */
2252 if (time_limit
|| microsecs
)
2254 EMACS_GET_TIME (end_time
);
2255 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2256 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2259 /* AlainF 5-Jul-1996
2260 HP-UX 10.10 seem to have problems with signals coming in
2261 Causes "poll: interrupted system call" messages when Emacs is run
2263 Turn off periodic alarms (in case they are in use) */
2269 int timeout_reduced_for_timers
= 0;
2271 /* If calling from keyboard input, do not quit
2272 since we want to return C-g as an input character.
2273 Otherwise, do pending quit if requested. */
2274 if (XINT (read_kbd
) >= 0)
2277 /* Exit now if the cell we're waiting for became non-nil. */
2278 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2281 /* Compute time from now till when time limit is up */
2282 /* Exit if already run out */
2283 if (time_limit
== -1)
2285 /* -1 specified for timeout means
2286 gobble output available now
2287 but don't wait at all. */
2289 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2291 else if (time_limit
|| microsecs
)
2293 EMACS_GET_TIME (timeout
);
2294 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2295 if (EMACS_TIME_NEG_P (timeout
))
2300 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2303 /* Normally we run timers here.
2304 But not if wait_for_cell; in those cases,
2305 the wait is supposed to be short,
2306 and those callers cannot handle running arbitrary Lisp code here. */
2307 if (! wait_for_cell
)
2309 EMACS_TIME timer_delay
;
2313 old_timers_run
= timers_run
;
2314 timer_delay
= timer_check (1);
2315 if (timers_run
!= old_timers_run
&& do_display
)
2317 redisplay_preserve_echo_area ();
2318 /* We must retry, since a timer may have requeued itself
2319 and that could alter the time_delay. */
2323 /* If there is unread keyboard input, also return. */
2324 if (XINT (read_kbd
) != 0
2325 && requeued_events_pending_p ())
2328 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2330 EMACS_TIME difference
;
2331 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2332 if (EMACS_TIME_NEG_P (difference
))
2334 timeout
= timer_delay
;
2335 timeout_reduced_for_timers
= 1;
2338 /* If time_limit is -1, we are not going to wait at all. */
2339 else if (time_limit
!= -1)
2341 /* This is so a breakpoint can be put here. */
2342 wait_reading_process_input_1 ();
2346 /* Cause C-g and alarm signals to take immediate action,
2347 and cause input available signals to zero out timeout.
2349 It is important that we do this before checking for process
2350 activity. If we get a SIGCHLD after the explicit checks for
2351 process activity, timeout is the only way we will know. */
2352 if (XINT (read_kbd
) < 0)
2353 set_waiting_for_input (&timeout
);
2355 /* If status of something has changed, and no input is
2356 available, notify the user of the change right away. After
2357 this explicit check, we'll let the SIGCHLD handler zap
2358 timeout to get our attention. */
2359 if (update_tick
!= process_tick
&& do_display
)
2361 Atemp
= input_wait_mask
;
2362 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2363 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
2364 &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2368 /* It's okay for us to do this and then continue with
2369 the loop, since timeout has already been zeroed out. */
2370 clear_waiting_for_input ();
2375 /* Don't wait for output from a non-running process. */
2376 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2377 update_status (wait_proc
);
2379 && ! EQ (wait_proc
->status
, Qrun
))
2381 int nread
, total_nread
= 0;
2383 clear_waiting_for_input ();
2384 XSETPROCESS (proc
, wait_proc
);
2386 /* Read data from the process, until we exhaust it. */
2387 while (XINT (wait_proc
->infd
) >= 0
2389 = read_process_output (proc
, XINT (wait_proc
->infd
))))
2392 total_nread
+= nread
;
2394 else if (nread
== -1 && EIO
== errno
)
2398 if (total_nread
> 0 && do_display
)
2399 redisplay_preserve_echo_area ();
2404 /* Wait till there is something to do */
2407 Available
= non_process_wait_mask
;
2408 else if (! XINT (read_kbd
))
2409 Available
= non_keyboard_wait_mask
;
2411 Available
= input_wait_mask
;
2413 /* If frame size has changed or the window is newly mapped,
2414 redisplay now, before we start to wait. There is a race
2415 condition here; if a SIGIO arrives between now and the select
2416 and indicates that a frame is trashed, the select may block
2417 displaying a trashed screen. */
2418 if (frame_garbaged
&& do_display
)
2420 clear_waiting_for_input ();
2421 redisplay_preserve_echo_area ();
2422 if (XINT (read_kbd
) < 0)
2423 set_waiting_for_input (&timeout
);
2426 if (XINT (read_kbd
) && detect_input_pending ())
2429 FD_ZERO (&Available
);
2432 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
2433 &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2438 /* Make C-g and alarm signals set flags again */
2439 clear_waiting_for_input ();
2441 /* If we woke up due to SIGWINCH, actually change size now. */
2442 do_pending_window_change ();
2444 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2445 /* We wanted the full specified time, so return now. */
2449 if (xerrno
== EINTR
)
2450 FD_ZERO (&Available
);
2452 /* Ultrix select seems to return ENOMEM when it is
2453 interrupted. Treat it just like EINTR. Bleah. Note
2454 that we want to test for the "ultrix" CPP symbol, not
2455 "__ultrix__"; the latter is only defined under GCC, but
2456 not by DEC's bundled CC. -JimB */
2457 else if (xerrno
== ENOMEM
)
2458 FD_ZERO (&Available
);
2461 /* This happens for no known reason on ALLIANT.
2462 I am guessing that this is the right response. -- RMS. */
2463 else if (xerrno
== EFAULT
)
2464 FD_ZERO (&Available
);
2466 else if (xerrno
== EBADF
)
2469 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2470 the child's closure of the pts gives the parent a SIGHUP, and
2471 the ptc file descriptor is automatically closed,
2472 yielding EBADF here or at select() call above.
2473 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2474 in m/ibmrt-aix.h), and here we just ignore the select error.
2475 Cleanup occurs c/o status_notify after SIGCLD. */
2476 FD_ZERO (&Available
); /* Cannot depend on values returned */
2482 error ("select error: %s", strerror (xerrno
));
2484 #if defined(sun) && !defined(USG5_4)
2485 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2487 /* System sometimes fails to deliver SIGIO.
2489 David J. Mackenzie says that Emacs doesn't compile under
2490 Solaris if this code is enabled, thus the USG5_4 in the CPP
2491 conditional. "I haven't noticed any ill effects so far.
2492 If you find a Solaris expert somewhere, they might know
2494 kill (getpid (), SIGIO
);
2497 #if 0 /* When polling is used, interrupt_input is 0,
2498 so get_input_pending should read the input.
2499 So this should not be needed. */
2500 /* If we are using polling for input,
2501 and we see input available, make it get read now.
2502 Otherwise it might not actually get read for a second.
2503 And on hpux, since we turn off polling in wait_reading_process_input,
2504 it might never get read at all if we don't spend much time
2505 outside of wait_reading_process_input. */
2506 if (XINT (read_kbd
) && interrupt_input
2507 && keyboard_bit_set (&Available
)
2508 && input_polling_used ())
2509 kill (getpid (), SIGALRM
);
2512 /* Check for keyboard input */
2513 /* If there is any, return immediately
2514 to give it higher priority than subprocesses */
2516 if (XINT (read_kbd
) != 0
2517 && detect_input_pending_run_timers (do_display
))
2519 swallow_events (do_display
);
2520 if (detect_input_pending_run_timers (do_display
))
2524 /* If there is unread keyboard input, also return. */
2525 if (XINT (read_kbd
) != 0
2526 && requeued_events_pending_p ())
2529 /* If we are not checking for keyboard input now,
2530 do process events (but don't run any timers).
2531 This is so that X events will be processed.
2532 Otherwise they may have to wait until polling takes place.
2533 That would causes delays in pasting selections, for example.
2535 (We used to do this only if wait_for_cell.) */
2536 if (XINT (read_kbd
) == 0 && detect_input_pending ())
2538 swallow_events (do_display
);
2539 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
2540 if (detect_input_pending ())
2545 /* Exit now if the cell we're waiting for became non-nil. */
2546 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2550 /* If we think we have keyboard input waiting, but didn't get SIGIO,
2551 go read it. This can happen with X on BSD after logging out.
2552 In that case, there really is no input and no SIGIO,
2553 but select says there is input. */
2555 if (XINT (read_kbd
) && interrupt_input
2556 && keyboard_bit_set (&Available
))
2557 kill (getpid (), SIGIO
);
2561 got_some_input
|= nfds
> 0;
2563 /* If checking input just got us a size-change event from X,
2564 obey it now if we should. */
2565 if (XINT (read_kbd
) || wait_for_cell
)
2566 do_pending_window_change ();
2568 /* Check for data from a process. */
2569 /* Really FIRST_PROC_DESC should be 0 on Unix,
2570 but this is safer in the short run. */
2571 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2573 if (FD_ISSET (channel
, &Available
)
2574 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2578 /* If waiting for this channel, arrange to return as
2579 soon as no more input to be processed. No more
2581 if (wait_channel
== channel
)
2587 proc
= chan_process
[channel
];
2591 /* Read data from the process, starting with our
2592 buffered-ahead character if we have one. */
2594 nread
= read_process_output (proc
, channel
);
2597 /* Since read_process_output can run a filter,
2598 which can call accept-process-output,
2599 don't try to read from any other processes
2600 before doing the select again. */
2601 FD_ZERO (&Available
);
2604 redisplay_preserve_echo_area ();
2607 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2610 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2611 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2613 else if (nread
== -1 && errno
== EAGAIN
)
2617 else if (nread
== -1 && errno
== EAGAIN
)
2619 /* Note that we cannot distinguish between no input
2620 available now and a closed pipe.
2621 With luck, a closed pipe will be accompanied by
2622 subprocess termination and SIGCHLD. */
2623 else if (nread
== 0 && !NETCONN_P (proc
))
2625 #endif /* O_NDELAY */
2626 #endif /* O_NONBLOCK */
2628 /* On some OSs with ptys, when the process on one end of
2629 a pty exits, the other end gets an error reading with
2630 errno = EIO instead of getting an EOF (0 bytes read).
2631 Therefore, if we get an error reading and errno =
2632 EIO, just continue, because the child process has
2633 exited and should clean itself up soon (e.g. when we
2635 else if (nread
== -1 && errno
== EIO
)
2637 #endif /* HAVE_PTYS */
2638 /* If we can detect process termination, don't consider the process
2639 gone just because its pipe is closed. */
2641 else if (nread
== 0 && !NETCONN_P (proc
))
2646 /* Preserve status of processes already terminated. */
2647 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2648 deactivate_process (proc
);
2649 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2650 update_status (XPROCESS (proc
));
2651 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2652 XPROCESS (proc
)->status
2653 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2656 } /* end for each file descriptor */
2657 } /* end while exit conditions not met */
2659 waiting_for_user_input_p
= 0;
2661 /* If calling from keyboard input, do not quit
2662 since we want to return C-g as an input character.
2663 Otherwise, do pending quit if requested. */
2664 if (XINT (read_kbd
) >= 0)
2666 /* Prevent input_pending from remaining set if we quit. */
2667 clear_input_pending ();
2671 /* AlainF 5-Jul-1996
2672 HP-UX 10.10 seems to have problems with signals coming in
2673 Causes "poll: interrupted system call" messages when Emacs is run
2675 Turn periodic alarms back on */
2679 return got_some_input
;
2682 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2685 read_process_output_call (fun_and_args
)
2686 Lisp_Object fun_and_args
;
2688 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2692 read_process_output_error_handler (error
)
2695 cmd_error_internal (error
, "error in process filter: ");
2697 update_echo_area ();
2698 Fsleep_for (make_number (2), Qnil
);
2701 /* Read pending output from the process channel,
2702 starting with our buffered-ahead character if we have one.
2703 Yield number of decoded characters read.
2705 This function reads at most 1024 characters.
2706 If you want to read all available subprocess output,
2707 you must call it repeatedly until it returns zero.
2709 The characters read are decoded according to PROC's coding-system
2712 read_process_output (proc
, channel
)
2714 register int channel
;
2716 register int nchars
, nbytes
;
2719 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2723 register Lisp_Object outstream
;
2724 register struct buffer
*old
= current_buffer
;
2725 register struct Lisp_Process
*p
= XPROCESS (proc
);
2726 register int opoint
;
2727 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2728 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2729 XSTRING (p->decoding_buf)->data. */
2730 int carryover
= XINT (p
->decoding_carryover
);
2733 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2735 vs
= get_vms_process_pointer (p
->pid
);
2739 return(0); /* Really weird if it does this */
2740 if (!(vs
->iosb
[0] & 1))
2741 return -1; /* I/O error */
2744 error ("Could not get VMS process pointer");
2745 chars
= vs
->inputBuffer
;
2746 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2749 start_vms_process_read (vs
); /* Crank up the next read on the process */
2750 return 1; /* Nothing worth printing, say we got 1 */
2754 /* The data carried over in the previous decoding (which are at
2755 the tail of decoding buffer) should be prepended to the new
2756 data read to decode all together. */
2757 char *buf
= (char *) xmalloc (nbytes
+ carryover
);
2759 bcopy (XSTRING (p
->decoding_buf
)->data
2760 + XSTRING (p
->decoding_buf
)->size_byte
- carryover
,
2762 bcopy (chars
, buf
+ carryover
, nbytes
);
2764 chars_allocated
= 1;
2769 /* See the comment above. */
2770 bcopy (XSTRING (p
->decoding_buf
)->data
2771 + XSTRING (p
->decoding_buf
)->size_byte
- carryover
,
2774 if (proc_buffered_char
[channel
] < 0)
2775 nbytes
= read (channel
, buf
+ carryover
, (sizeof buf
) - carryover
);
2778 buf
[carryover
] = proc_buffered_char
[channel
];
2779 proc_buffered_char
[channel
] = -1;
2780 nbytes
= read (channel
, buf
+ carryover
+ 1,
2781 (sizeof buf
) - carryover
- 1);
2785 nbytes
= nbytes
+ 1;
2788 #endif /* not VMS */
2790 /* At this point, NBYTES holds number of characters just received
2791 (including the one in proc_buffered_char[channel]). */
2792 if (nbytes
<= 0) return nbytes
;
2794 /* Now set NBYTES how many bytes we must decode. */
2795 nbytes
+= carryover
;
2798 if (CODING_MAY_REQUIRE_DECODING (coding
))
2800 int require
= decoding_buffer_size (coding
, nbytes
);
2803 if (XSTRING (p
->decoding_buf
)->size_byte
< require
)
2804 p
->decoding_buf
= make_uninit_string (require
);
2805 result
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2806 nbytes
, XSTRING (p
->decoding_buf
)->size_byte
);
2807 carryover
= nbytes
- coding
->consumed
;
2809 /* A new coding system might be found by `decode_coding'. */
2810 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2812 p
->decode_coding_system
= coding
->symbol
;
2814 /* Don't call setup_coding_system for
2815 proc_decode_coding_system[channel] here. It is done in
2816 detect_coding called via decode_coding above. */
2818 /* If a coding system for encoding is not yet decided, we set
2819 it as the same as coding-system for decoding.
2821 But, before doing that we must check if
2822 proc_encode_coding_system[p->outfd] surely points to a
2823 valid memory because p->outfd will be changed once EOF is
2824 sent to the process. */
2825 if (NILP (p
->encode_coding_system
)
2826 && proc_encode_coding_system
[p
->outfd
])
2828 p
->encode_coding_system
= coding
->symbol
;
2829 setup_coding_system (coding
->symbol
,
2830 proc_encode_coding_system
[p
->outfd
]);
2835 /* Now we don't need the contents of `chars'. */
2836 if (chars_allocated
)
2839 if (coding
->produced
== 0)
2841 chars
= (char *) XSTRING (p
->decoding_buf
)->data
;
2842 nbytes
= coding
->produced
;
2843 nchars
= coding
->produced_char
;
2844 chars_in_decoding_buf
= 1;
2847 else if (chars_allocated
)
2849 /* Although we don't have to decode the received data, we must
2850 move it to an area which we don't have to free. */
2851 if (! STRINGP (p
->decoding_buf
)
2852 || XSTRING (p
->decoding_buf
)->size
< nbytes
)
2853 p
->decoding_buf
= make_uninit_string (nbytes
);
2854 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nbytes
);
2856 chars
= XSTRING (p
->decoding_buf
)->data
;
2857 chars_in_decoding_buf
= 1;
2862 XSETINT (p
->decoding_carryover
, carryover
);
2863 Vlast_coding_system_used
= coding
->symbol
;
2865 /* Read and dispose of the process output. */
2866 outstream
= p
->filter
;
2867 if (!NILP (outstream
))
2869 /* We inhibit quit here instead of just catching it so that
2870 hitting ^G when a filter happens to be running won't screw
2872 int count
= specpdl_ptr
- specpdl
;
2873 Lisp_Object odeactivate
;
2874 Lisp_Object obuffer
, okeymap
;
2876 int outer_running_asynch_code
= running_asynch_code
;
2878 /* No need to gcpro these, because all we do with them later
2879 is test them for EQness, and none of them should be a string. */
2880 odeactivate
= Vdeactivate_mark
;
2881 XSETBUFFER (obuffer
, current_buffer
);
2882 okeymap
= current_buffer
->keymap
;
2884 specbind (Qinhibit_quit
, Qt
);
2885 specbind (Qlast_nonmenu_event
, Qt
);
2887 /* In case we get recursively called,
2888 and we already saved the match data nonrecursively,
2889 save the same match data in safely recursive fashion. */
2890 if (outer_running_asynch_code
)
2893 /* Don't clobber the CURRENT match data, either! */
2894 tem
= Fmatch_data (Qnil
, Qnil
);
2895 restore_match_data ();
2896 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
2897 Fstore_match_data (tem
);
2900 /* For speed, if a search happens within this code,
2901 save the match data in a special nonrecursive fashion. */
2902 running_asynch_code
= 1;
2904 text
= make_multibyte_string (chars
, nchars
, nbytes
);
2905 internal_condition_case_1 (read_process_output_call
,
2907 Fcons (proc
, Fcons (text
, Qnil
))),
2908 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2909 read_process_output_error_handler
);
2911 /* If we saved the match data nonrecursively, restore it now. */
2912 restore_match_data ();
2913 running_asynch_code
= outer_running_asynch_code
;
2915 /* Handling the process output should not deactivate the mark. */
2916 Vdeactivate_mark
= odeactivate
;
2918 #if 0 /* Call record_asynch_buffer_change unconditionally,
2919 because we might have changed minor modes or other things
2920 that affect key bindings. */
2921 if (! EQ (Fcurrent_buffer (), obuffer
)
2922 || ! EQ (current_buffer
->keymap
, okeymap
))
2924 /* But do it only if the caller is actually going to read events.
2925 Otherwise there's no need to make him wake up, and it could
2926 cause trouble (for example it would make Fsit_for return). */
2927 if (waiting_for_user_input_p
== -1)
2928 record_asynch_buffer_change ();
2931 start_vms_process_read (vs
);
2933 unbind_to (count
, Qnil
);
2937 /* If no filter, write into buffer if it isn't dead. */
2938 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2940 Lisp_Object old_read_only
;
2941 int old_begv
, old_zv
;
2942 int old_begv_byte
, old_zv_byte
;
2943 Lisp_Object odeactivate
;
2944 int before
, before_byte
;
2947 odeactivate
= Vdeactivate_mark
;
2949 Fset_buffer (p
->buffer
);
2951 opoint_byte
= PT_BYTE
;
2952 old_read_only
= current_buffer
->read_only
;
2955 old_begv_byte
= BEGV_BYTE
;
2956 old_zv_byte
= ZV_BYTE
;
2958 current_buffer
->read_only
= Qnil
;
2960 /* Insert new output into buffer
2961 at the current end-of-output marker,
2962 thus preserving logical ordering of input and output. */
2963 if (XMARKER (p
->mark
)->buffer
)
2964 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
2965 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
2968 SET_PT_BOTH (ZV
, ZV_BYTE
);
2970 before_byte
= PT_BYTE
;
2972 /* If the output marker is outside of the visible region, save
2973 the restriction and widen. */
2974 if (! (BEGV
<= PT
&& PT
<= ZV
))
2977 /* Insert before markers in case we are inserting where
2978 the buffer's mark is, and the user's next command is Meta-y. */
2979 if (chars_in_decoding_buf
)
2980 insert_from_string_before_markers (p
->decoding_buf
, 0, 0,
2983 insert_1_both (chars
, nchars
, nbytes
, 0, 1, 1);
2984 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
2986 update_mode_lines
++;
2988 /* Make sure opoint and the old restrictions
2989 float ahead of any new text just as point would. */
2990 if (opoint
>= before
)
2992 opoint
+= PT
- before
;
2993 opoint_byte
+= PT_BYTE
- before_byte
;
2995 if (old_begv
> before
)
2997 old_begv
+= PT
- before
;
2998 old_begv_byte
+= PT_BYTE
- before_byte
;
3000 if (old_zv
>= before
)
3002 old_zv
+= PT
- before
;
3003 old_zv_byte
+= PT_BYTE
- before_byte
;
3006 /* If the restriction isn't what it should be, set it. */
3007 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
3008 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
3010 /* Handling the process output should not deactivate the mark. */
3011 Vdeactivate_mark
= odeactivate
;
3013 current_buffer
->read_only
= old_read_only
;
3014 SET_PT_BOTH (opoint
, opoint_byte
);
3015 set_buffer_internal (old
);
3018 start_vms_process_read (vs
);
3023 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
3025 "Returns non-nil if emacs is waiting for input from the user.\n\
3026 This is intended for use by asynchronous process output filters and sentinels.")
3029 return (waiting_for_user_input_p
? Qt
: Qnil
);
3032 /* Sending data to subprocess */
3034 jmp_buf send_process_frame
;
3037 send_process_trap ()
3043 longjmp (send_process_frame
, 1);
3046 /* Send some data to process PROC.
3047 BUF is the beginning of the data; LEN is the number of characters.
3048 OBJECT is the Lisp object that the data comes from.
3050 The data is encoded by PROC's coding-system for encoding before it
3051 is sent. But if the data ends at the middle of multi-byte
3052 representation, that incomplete sequence of bytes are sent without
3053 being encoded. Should we store them in a buffer to prepend them to
3054 the data send later? */
3056 send_process (proc
, buf
, len
, object
)
3057 volatile Lisp_Object proc
;
3062 /* Use volatile to protect variables from being clobbered by longjmp. */
3064 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
3065 struct coding_system
*coding
;
3066 struct gcpro gcpro1
;
3067 int carryover
= XINT (XPROCESS (proc
)->encoding_carryover
);
3072 struct Lisp_Process
*p
= XPROCESS (proc
);
3073 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
3076 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3077 update_status (XPROCESS (proc
));
3078 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3079 error ("Process %s not running", procname
);
3080 if (XINT (XPROCESS (proc
)->outfd
) < 0)
3081 error ("Output file descriptor of %s is closed", procname
);
3083 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3084 Vlast_coding_system_used
= coding
->symbol
;
3086 if (CODING_REQUIRE_ENCODING (coding
))
3088 int require
= encoding_buffer_size (coding
, len
);
3090 unsigned char *temp_buf
= NULL
;
3092 /* Remember the offset of data because a string or a buffer may
3093 be relocated. Setting OFFSET to -1 means we don't have to
3095 offset
= (BUFFERP (object
)
3096 ? BUF_PTR_BYTE_POS (XBUFFER (object
), buf
)
3098 ? offset
= buf
- XSTRING (object
)->data
3103 temp_buf
= (unsigned char *) xmalloc (len
+ carryover
);
3107 if (BUFFERP (object
))
3108 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3109 else if (STRINGP (object
))
3110 buf
= offset
+ XSTRING (object
)->data
;
3111 /* Now we don't have to care relocation. */
3114 bcopy ((XSTRING (XPROCESS (proc
)->encoding_buf
)->data
3115 + XSTRING (XPROCESS (proc
)->encoding_buf
)->size_byte
3119 bcopy (buf
, temp_buf
+ carryover
, len
);
3123 if (XSTRING (XPROCESS (proc
)->encoding_buf
)->size_byte
< require
)
3125 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
3129 if (BUFFERP (object
))
3130 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3131 else if (STRINGP (object
))
3132 buf
= offset
+ XSTRING (object
)->data
;
3135 object
= XPROCESS (proc
)->encoding_buf
;
3136 encode_coding (coding
, buf
, XSTRING (object
)->data
,
3137 len
, XSTRING (object
)->size_byte
);
3138 len
= coding
->produced
;
3139 buf
= XSTRING (object
)->data
;
3145 vs
= get_vms_process_pointer (p
->pid
);
3147 error ("Could not find this process: %x", p
->pid
);
3148 else if (write_to_vms_process (vs
, buf
, len
))
3152 if (pty_max_bytes
== 0)
3154 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3155 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3157 if (pty_max_bytes
< 0)
3158 pty_max_bytes
= 250;
3160 pty_max_bytes
= 250;
3162 /* Deduct one, to leave space for the eof. */
3166 if (!setjmp (send_process_frame
))
3170 SIGTYPE (*old_sigpipe
)();
3173 /* Decide how much data we can send in one batch.
3174 Long lines need to be split into multiple batches. */
3175 if (!NILP (XPROCESS (proc
)->pty_flag
))
3177 /* Starting this at zero is always correct when not the first iteration
3178 because the previous iteration ended by sending C-d.
3179 It may not be correct for the first iteration
3180 if a partial line was sent in a separate send_process call.
3181 If that proves worth handling, we need to save linepos
3182 in the process object. */
3184 unsigned char *ptr
= buf
;
3185 unsigned char *end
= buf
+ len
;
3187 /* Scan through this text for a line that is too long. */
3188 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3196 /* If we found one, break the line there
3197 and put in a C-d to force the buffer through. */
3201 /* Send this batch, using one or more write calls. */
3204 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3205 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3206 signal (SIGPIPE
, old_sigpipe
);
3212 || errno
== EWOULDBLOCK
3218 /* Buffer is full. Wait, accepting input;
3219 that may allow the program
3220 to finish doing output and read more. */
3225 /* Running filters might relocate buffers or strings.
3226 Arrange to relocate BUF. */
3227 if (BUFFERP (object
))
3228 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
3229 else if (STRINGP (object
))
3230 offset
= buf
- XSTRING (object
)->data
;
3232 XSETFASTINT (zero
, 0);
3233 #ifdef EMACS_HAS_USECS
3234 wait_reading_process_input (0, 20000, zero
, 0);
3236 wait_reading_process_input (1, 0, zero
, 0);
3239 if (BUFFERP (object
))
3240 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3241 else if (STRINGP (object
))
3242 buf
= offset
+ XSTRING (object
)->data
;
3247 /* This is a real error. */
3248 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3255 /* If we sent just part of the string, put in an EOF
3256 to force it through, before we send the rest. */
3258 Fprocess_send_eof (proc
);
3263 XPROCESS (proc
)->raw_status_low
= Qnil
;
3264 XPROCESS (proc
)->raw_status_high
= Qnil
;
3265 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3266 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3267 deactivate_process (proc
);
3269 error ("Error writing to process %s; closed it", procname
);
3271 error ("SIGPIPE raised on process %s; closed it", procname
);
3278 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3280 "Send current contents of region as input to PROCESS.\n\
3281 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3282 nil, indicating the current buffer's process.\n\
3283 Called from program, takes three arguments, PROCESS, START and END.\n\
3284 If the region is more than 500 characters long,\n\
3285 it is sent in several bunches. This may happen even for shorter regions.\n\
3286 Output from processes can arrive in between bunches.")
3287 (process
, start
, end
)
3288 Lisp_Object process
, start
, end
;
3293 proc
= get_process (process
);
3294 validate_region (&start
, &end
);
3296 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3297 move_gap (XINT (start
));
3299 start1
= CHAR_TO_BYTE (XINT (start
));
3300 end1
= CHAR_TO_BYTE (XINT (end
));
3301 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
3302 Fcurrent_buffer ());
3307 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3309 "Send PROCESS the contents of STRING as input.\n\
3310 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3311 nil, indicating the current buffer's process.\n\
3312 If STRING is more than 500 characters long,\n\
3313 it is sent in several bunches. This may happen even for shorter strings.\n\
3314 Output from processes can arrive in between bunches.")
3316 Lisp_Object process
, string
;
3319 CHECK_STRING (string
, 1);
3320 proc
= get_process (process
);
3321 send_process (proc
, XSTRING (string
)->data
,
3322 XSTRING (string
)->size_byte
, string
);
3326 /* send a signal number SIGNO to PROCESS.
3327 CURRENT_GROUP means send to the process group that currently owns
3328 the terminal being used to communicate with PROCESS.
3329 This is used for various commands in shell mode.
3330 If NOMSG is zero, insert signal-announcements into process's buffers
3333 If we can, we try to signal PROCESS by sending control characters
3334 down the pty. This allows us to signal inferiors who have changed
3335 their uid, for which killpg would return an EPERM error. */
3338 process_send_signal (process
, signo
, current_group
, nomsg
)
3339 Lisp_Object process
;
3341 Lisp_Object current_group
;
3345 register struct Lisp_Process
*p
;
3349 proc
= get_process (process
);
3350 p
= XPROCESS (proc
);
3352 if (!EQ (p
->childp
, Qt
))
3353 error ("Process %s is not a subprocess",
3354 XSTRING (p
->name
)->data
);
3355 if (XINT (p
->infd
) < 0)
3356 error ("Process %s is not active",
3357 XSTRING (p
->name
)->data
);
3359 if (NILP (p
->pty_flag
))
3360 current_group
= Qnil
;
3362 /* If we are using pgrps, get a pgrp number and make it negative. */
3363 if (!NILP (current_group
))
3365 #ifdef SIGNALS_VIA_CHARACTERS
3366 /* If possible, send signals to the entire pgrp
3367 by sending an input character to it. */
3369 /* TERMIOS is the latest and bestest, and seems most likely to
3370 work. If the system has it, use it. */
3377 tcgetattr (XINT (p
->infd
), &t
);
3378 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3382 tcgetattr (XINT (p
->infd
), &t
);
3383 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3387 tcgetattr (XINT (p
->infd
), &t
);
3388 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3389 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3391 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3396 #else /* ! HAVE_TERMIOS */
3398 /* On Berkeley descendants, the following IOCTL's retrieve the
3399 current control characters. */
3400 #if defined (TIOCGLTC) && defined (TIOCGETC)
3408 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3409 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3412 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3413 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3417 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3418 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3420 #endif /* ! defined (SIGTSTP) */
3423 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3425 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3432 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3433 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3436 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3437 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3441 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3442 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3444 #endif /* ! defined (SIGTSTP) */
3446 #else /* ! defined (TCGETA) */
3447 Your configuration files are messed up
.
3448 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3449 you'd better be using one of the alternatives above! */
3450 #endif /* ! defined (TCGETA) */
3451 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3452 #endif /* ! defined HAVE_TERMIOS */
3453 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3456 /* Get the pgrp using the tty itself, if we have that.
3457 Otherwise, use the pty to get the pgrp.
3458 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3459 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3460 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3461 His patch indicates that if TIOCGPGRP returns an error, then
3462 we should just assume that p->pid is also the process group id. */
3466 if (!NILP (p
->subtty
))
3467 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3469 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3473 gid
= - XFASTINT (p
->pid
);
3474 #endif /* ! defined (pfa) */
3480 #else /* ! defined (TIOCGPGRP ) */
3481 /* Can't select pgrps on this system, so we know that
3482 the child itself heads the pgrp. */
3483 gid
= - XFASTINT (p
->pid
);
3484 #endif /* ! defined (TIOCGPGRP ) */
3487 gid
= - XFASTINT (p
->pid
);
3493 p
->raw_status_low
= Qnil
;
3494 p
->raw_status_high
= Qnil
;
3496 XSETINT (p
->tick
, ++process_tick
);
3500 #endif /* ! defined (SIGCONT) */
3503 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3508 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3513 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3516 flush_pending_output (XINT (p
->infd
));
3520 /* If we don't have process groups, send the signal to the immediate
3521 subprocess. That isn't really right, but it's better than any
3522 obvious alternative. */
3525 kill (XFASTINT (p
->pid
), signo
);
3529 /* gid may be a pid, or minus a pgrp's number */
3531 if (!NILP (current_group
))
3532 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3535 gid
= - XFASTINT (p
->pid
);
3538 #else /* ! defined (TIOCSIGSEND) */
3539 EMACS_KILLPG (-gid
, signo
);
3540 #endif /* ! defined (TIOCSIGSEND) */
3543 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3544 "Interrupt process PROCESS. May be process or name of one.\n\
3545 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3546 nil or no arg means current buffer's process.\n\
3547 Second arg CURRENT-GROUP non-nil means send signal to\n\
3548 the current process-group of the process's controlling terminal\n\
3549 rather than to the process's own process group.\n\
3550 If the process is a shell, this means interrupt current subjob\n\
3551 rather than the shell.")
3552 (process
, current_group
)
3553 Lisp_Object process
, current_group
;
3555 process_send_signal (process
, SIGINT
, current_group
, 0);
3559 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3560 "Kill process PROCESS. May be process or name of one.\n\
3561 See function `interrupt-process' for more details on usage.")
3562 (process
, current_group
)
3563 Lisp_Object process
, current_group
;
3565 process_send_signal (process
, SIGKILL
, current_group
, 0);
3569 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3570 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3571 See function `interrupt-process' for more details on usage.")
3572 (process
, current_group
)
3573 Lisp_Object process
, current_group
;
3575 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3579 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3580 "Stop process PROCESS. May be process or name of one.\n\
3581 See function `interrupt-process' for more details on usage.")
3582 (process
, current_group
)
3583 Lisp_Object process
, current_group
;
3586 error ("no SIGTSTP support");
3588 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3593 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3594 "Continue process PROCESS. May be process or name of one.\n\
3595 See function `interrupt-process' for more details on usage.")
3596 (process
, current_group
)
3597 Lisp_Object process
, current_group
;
3600 process_send_signal (process
, SIGCONT
, current_group
, 0);
3602 error ("no SIGCONT support");
3607 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3608 2, 2, "nProcess number: \nnSignal code: ",
3609 "Send the process with process id PID the signal with code SIGCODE.\n\
3610 PID must be an integer. The process need not be a child of this Emacs.\n\
3611 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3613 Lisp_Object pid
, sigcode
;
3615 CHECK_NUMBER (pid
, 0);
3617 #define handle_signal(NAME, VALUE) \
3618 else if (!strcmp (name, NAME)) \
3619 XSETINT (sigcode, VALUE)
3621 if (INTEGERP (sigcode
))
3625 unsigned char *name
;
3627 CHECK_SYMBOL (sigcode
, 1);
3628 name
= XSYMBOL (sigcode
)->name
->data
;
3633 handle_signal ("SIGHUP", SIGHUP
);
3636 handle_signal ("SIGINT", SIGINT
);
3639 handle_signal ("SIGQUIT", SIGQUIT
);
3642 handle_signal ("SIGILL", SIGILL
);
3645 handle_signal ("SIGABRT", SIGABRT
);
3648 handle_signal ("SIGEMT", SIGEMT
);
3651 handle_signal ("SIGKILL", SIGKILL
);
3654 handle_signal ("SIGFPE", SIGFPE
);
3657 handle_signal ("SIGBUS", SIGBUS
);
3660 handle_signal ("SIGSEGV", SIGSEGV
);
3663 handle_signal ("SIGSYS", SIGSYS
);
3666 handle_signal ("SIGPIPE", SIGPIPE
);
3669 handle_signal ("SIGALRM", SIGALRM
);
3672 handle_signal ("SIGTERM", SIGTERM
);
3675 handle_signal ("SIGURG", SIGURG
);
3678 handle_signal ("SIGSTOP", SIGSTOP
);
3681 handle_signal ("SIGTSTP", SIGTSTP
);
3684 handle_signal ("SIGCONT", SIGCONT
);
3687 handle_signal ("SIGCHLD", SIGCHLD
);
3690 handle_signal ("SIGTTIN", SIGTTIN
);
3693 handle_signal ("SIGTTOU", SIGTTOU
);
3696 handle_signal ("SIGIO", SIGIO
);
3699 handle_signal ("SIGXCPU", SIGXCPU
);
3702 handle_signal ("SIGXFSZ", SIGXFSZ
);
3705 handle_signal ("SIGVTALRM", SIGVTALRM
);
3708 handle_signal ("SIGPROF", SIGPROF
);
3711 handle_signal ("SIGWINCH", SIGWINCH
);
3714 handle_signal ("SIGINFO", SIGINFO
);
3717 handle_signal ("SIGUSR1", SIGUSR1
);
3720 handle_signal ("SIGUSR2", SIGUSR2
);
3723 error ("Undefined signal name %s", name
);
3726 #undef handle_signal
3728 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3731 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3732 "Make PROCESS see end-of-file in its input.\n\
3733 Eof comes after any text already sent to it.\n\
3734 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3735 nil, indicating the current buffer's process.\n\
3736 If PROCESS is a network connection, or is a process communicating\n\
3737 through a pipe (as opposed to a pty), then you cannot send any more\n\
3738 text to PROCESS after you call this function.")
3740 Lisp_Object process
;
3744 proc
= get_process (process
);
3746 /* Make sure the process is really alive. */
3747 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3748 update_status (XPROCESS (proc
));
3749 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3750 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3753 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3755 if (!NILP (XPROCESS (proc
)->pty_flag
))
3756 send_process (proc
, "\004", 1, Qnil
);
3759 #ifdef HAVE_SHUTDOWN
3760 /* If this is a network connection, or socketpair is used
3761 for communication with the subprocess, call shutdown to cause EOF.
3762 (In some old system, shutdown to socketpair doesn't work.
3763 Then we just can't win.) */
3764 if (NILP (XPROCESS (proc
)->pid
)
3765 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
3766 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
3767 /* In case of socketpair, outfd == infd, so don't close it. */
3768 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
3769 close (XINT (XPROCESS (proc
)->outfd
));
3770 #else /* not HAVE_SHUTDOWN */
3771 close (XINT (XPROCESS (proc
)->outfd
));
3772 #endif /* not HAVE_SHUTDOWN */
3773 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3779 /* Kill all processes associated with `buffer'.
3780 If `buffer' is nil, kill all processes */
3783 kill_buffer_processes (buffer
)
3786 Lisp_Object tail
, proc
;
3788 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3790 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3791 if (GC_PROCESSP (proc
)
3792 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3794 if (NETCONN_P (proc
))
3795 Fdelete_process (proc
);
3796 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3797 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3802 /* On receipt of a signal that a child status has changed,
3803 loop asking about children with changed statuses until
3804 the system says there are no more.
3805 All we do is change the status;
3806 we do not run sentinels or print notifications.
3807 That is saved for the next time keyboard input is done,
3808 in order to avoid timing errors. */
3810 /** WARNING: this can be called during garbage collection.
3811 Therefore, it must not be fooled by the presence of mark bits in
3814 /** USG WARNING: Although it is not obvious from the documentation
3815 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3816 signal() before executing at least one wait(), otherwise the handler
3817 will be called again, resulting in an infinite loop. The relevant
3818 portion of the documentation reads "SIGCLD signals will be queued
3819 and the signal-catching function will be continually reentered until
3820 the queue is empty". Invoking signal() causes the kernel to reexamine
3821 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3824 sigchld_handler (signo
)
3827 int old_errno
= errno
;
3829 register struct Lisp_Process
*p
;
3830 extern EMACS_TIME
*input_available_clear_time
;
3834 sigheld
|= sigbit (SIGCHLD
);
3846 #endif /* no WUNTRACED */
3847 /* Keep trying to get a status until we get a definitive result. */
3851 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3853 while (pid
<= 0 && errno
== EINTR
);
3857 /* A real failure. We have done all our job, so return. */
3859 /* USG systems forget handlers when they are used;
3860 must reestablish each time */
3861 #if defined (USG) && !defined (POSIX_SIGNALS)
3862 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3865 sigheld
&= ~sigbit (SIGCHLD
);
3873 #endif /* no WNOHANG */
3875 /* Find the process that signaled us, and record its status. */
3878 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3880 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3881 p
= XPROCESS (proc
);
3882 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3887 /* Look for an asynchronous process whose pid hasn't been filled
3890 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3892 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3893 p
= XPROCESS (proc
);
3894 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3899 /* Change the status of the process that was found. */
3902 union { int i
; WAITTYPE wt
; } u
;
3903 int clear_desc_flag
= 0;
3905 XSETINT (p
->tick
, ++process_tick
);
3907 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3908 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3910 /* If process has terminated, stop waiting for its output. */
3911 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3912 && XINT (p
->infd
) >= 0)
3913 clear_desc_flag
= 1;
3915 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3916 if (clear_desc_flag
)
3918 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3919 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3922 /* Tell wait_reading_process_input that it needs to wake up and
3924 if (input_available_clear_time
)
3925 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3928 /* There was no asynchronous process found for that id. Check
3929 if we have a synchronous process. */
3932 synch_process_alive
= 0;
3934 /* Report the status of the synchronous process. */
3936 synch_process_retcode
= WRETCODE (w
);
3937 else if (WIFSIGNALED (w
))
3939 int code
= WTERMSIG (w
);
3945 /* Suppress warning if the table has const char *. */
3946 signame
= (char *) sys_siglist
[code
];
3948 signame
= sys_errlist
[code
];
3952 signame
= "unknown";
3954 synch_process_death
= signame
;
3957 /* Tell wait_reading_process_input that it needs to wake up and
3959 if (input_available_clear_time
)
3960 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3963 /* On some systems, we must return right away.
3964 If any more processes want to signal us, we will
3966 Otherwise (on systems that have WNOHANG), loop around
3967 to use up all the processes that have something to tell us. */
3968 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3969 #if defined (USG) && ! defined (POSIX_SIGNALS)
3970 signal (signo
, sigchld_handler
);
3974 #endif /* USG, but not HPUX with WNOHANG */
3980 exec_sentinel_unwind (data
)
3983 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3988 exec_sentinel_error_handler (error
)
3991 cmd_error_internal (error
, "error in process sentinel: ");
3993 update_echo_area ();
3994 Fsleep_for (make_number (2), Qnil
);
3998 exec_sentinel (proc
, reason
)
3999 Lisp_Object proc
, reason
;
4001 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
4002 register struct Lisp_Process
*p
= XPROCESS (proc
);
4003 int count
= specpdl_ptr
- specpdl
;
4004 int outer_running_asynch_code
= running_asynch_code
;
4006 /* No need to gcpro these, because all we do with them later
4007 is test them for EQness, and none of them should be a string. */
4008 odeactivate
= Vdeactivate_mark
;
4009 XSETBUFFER (obuffer
, current_buffer
);
4010 okeymap
= current_buffer
->keymap
;
4012 sentinel
= p
->sentinel
;
4013 if (NILP (sentinel
))
4016 /* Zilch the sentinel while it's running, to avoid recursive invocations;
4017 assure that it gets restored no matter how the sentinel exits. */
4019 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
4020 /* Inhibit quit so that random quits don't screw up a running filter. */
4021 specbind (Qinhibit_quit
, Qt
);
4022 specbind (Qlast_nonmenu_event
, Qt
);
4024 /* In case we get recursively called,
4025 and we already saved the match data nonrecursively,
4026 save the same match data in safely recursive fashion. */
4027 if (outer_running_asynch_code
)
4030 tem
= Fmatch_data (Qnil
, Qnil
);
4031 restore_match_data ();
4032 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
4033 Fstore_match_data (tem
);
4036 /* For speed, if a search happens within this code,
4037 save the match data in a special nonrecursive fashion. */
4038 running_asynch_code
= 1;
4040 internal_condition_case_1 (read_process_output_call
,
4042 Fcons (proc
, Fcons (reason
, Qnil
))),
4043 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4044 exec_sentinel_error_handler
);
4046 /* If we saved the match data nonrecursively, restore it now. */
4047 restore_match_data ();
4048 running_asynch_code
= outer_running_asynch_code
;
4050 Vdeactivate_mark
= odeactivate
;
4052 if (! EQ (Fcurrent_buffer (), obuffer
)
4053 || ! EQ (current_buffer
->keymap
, okeymap
))
4055 /* But do it only if the caller is actually going to read events.
4056 Otherwise there's no need to make him wake up, and it could
4057 cause trouble (for example it would make Fsit_for return). */
4058 if (waiting_for_user_input_p
== -1)
4059 record_asynch_buffer_change ();
4061 unbind_to (count
, Qnil
);
4064 /* Report all recent events of a change in process status
4065 (either run the sentinel or output a message).
4066 This is done while Emacs is waiting for keyboard input. */
4071 register Lisp_Object proc
, buffer
;
4072 Lisp_Object tail
, msg
;
4073 struct gcpro gcpro1
, gcpro2
;
4077 /* We need to gcpro tail; if read_process_output calls a filter
4078 which deletes a process and removes the cons to which tail points
4079 from Vprocess_alist, and then causes a GC, tail is an unprotected
4083 /* Set this now, so that if new processes are created by sentinels
4084 that we run, we get called again to handle their status changes. */
4085 update_tick
= process_tick
;
4087 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
4090 register struct Lisp_Process
*p
;
4092 proc
= Fcdr (Fcar (tail
));
4093 p
= XPROCESS (proc
);
4095 if (XINT (p
->tick
) != XINT (p
->update_tick
))
4097 XSETINT (p
->update_tick
, XINT (p
->tick
));
4099 /* If process is still active, read any output that remains. */
4100 while (! EQ (p
->filter
, Qt
)
4101 && XINT (p
->infd
) >= 0
4102 && read_process_output (proc
, XINT (p
->infd
)) > 0);
4106 /* Get the text to use for the message. */
4107 if (!NILP (p
->raw_status_low
))
4109 msg
= status_message (p
->status
);
4111 /* If process is terminated, deactivate it or delete it. */
4113 if (CONSP (p
->status
))
4114 symbol
= XCONS (p
->status
)->car
;
4116 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
4117 || EQ (symbol
, Qclosed
))
4119 if (delete_exited_processes
)
4120 remove_process (proc
);
4122 deactivate_process (proc
);
4125 /* The actions above may have further incremented p->tick.
4126 So set p->update_tick again
4127 so that an error in the sentinel will not cause
4128 this code to be run again. */
4129 XSETINT (p
->update_tick
, XINT (p
->tick
));
4130 /* Now output the message suitably. */
4131 if (!NILP (p
->sentinel
))
4132 exec_sentinel (proc
, msg
);
4133 /* Don't bother with a message in the buffer
4134 when a process becomes runnable. */
4135 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
4137 Lisp_Object ro
, tem
;
4138 struct buffer
*old
= current_buffer
;
4139 int opoint
, opoint_byte
;
4140 int before
, before_byte
;
4142 ro
= XBUFFER (buffer
)->read_only
;
4144 /* Avoid error if buffer is deleted
4145 (probably that's why the process is dead, too) */
4146 if (NILP (XBUFFER (buffer
)->name
))
4148 Fset_buffer (buffer
);
4151 opoint_byte
= PT_BYTE
;
4152 /* Insert new output into buffer
4153 at the current end-of-output marker,
4154 thus preserving logical ordering of input and output. */
4155 if (XMARKER (p
->mark
)->buffer
)
4156 Fgoto_char (p
->mark
);
4158 SET_PT_BOTH (ZV
, ZV_BYTE
);
4161 before_byte
= PT_BYTE
;
4163 tem
= current_buffer
->read_only
;
4164 current_buffer
->read_only
= Qnil
;
4165 insert_string ("\nProcess ");
4166 Finsert (1, &p
->name
);
4167 insert_string (" ");
4169 current_buffer
->read_only
= tem
;
4170 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4172 if (opoint
>= before
)
4173 SET_PT_BOTH (opoint
+ (PT
- before
),
4174 opoint_byte
+ (PT_BYTE
- before_byte
));
4176 SET_PT_BOTH (opoint
, opoint_byte
);
4178 set_buffer_internal (old
);
4183 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4184 redisplay_preserve_echo_area ();
4190 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4191 Sset_process_coding_system
, 1, 3, 0,
4192 "Set coding systems of PROCESS to DECODING (input from the process) and\n\
4193 ENCODING (output to the process).")
4194 (proc
, decoding
, encoding
)
4195 register Lisp_Object proc
, decoding
, encoding
;
4197 register struct Lisp_Process
*p
;
4199 CHECK_PROCESS (proc
, 0);
4200 p
= XPROCESS (proc
);
4201 if (XINT (p
->infd
) < 0)
4202 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4203 if (XINT (p
->outfd
) < 0)
4204 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4206 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4207 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4208 setup_coding_system (decoding
,
4209 proc_decode_coding_system
[XINT (p
->infd
)]);
4210 setup_coding_system (encoding
,
4211 proc_encode_coding_system
[XINT (p
->outfd
)]);
4216 DEFUN ("process-coding-system",
4217 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4218 "Return a cons of coding systems for decoding and encoding of PROCESS.")
4220 register Lisp_Object proc
;
4222 CHECK_PROCESS (proc
, 0);
4223 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4224 XPROCESS (proc
)->encode_coding_system
);
4227 /* The first time this is called, assume keyboard input comes from DESC
4228 instead of from where we used to expect it.
4229 Subsequent calls mean assume input keyboard can come from DESC
4230 in addition to other places. */
4232 static int add_keyboard_wait_descriptor_called_flag
;
4235 add_keyboard_wait_descriptor (desc
)
4238 if (! add_keyboard_wait_descriptor_called_flag
)
4239 FD_CLR (0, &input_wait_mask
);
4240 add_keyboard_wait_descriptor_called_flag
= 1;
4241 FD_SET (desc
, &input_wait_mask
);
4242 FD_SET (desc
, &non_process_wait_mask
);
4243 if (desc
> max_keyboard_desc
)
4244 max_keyboard_desc
= desc
;
4247 /* From now on, do not expect DESC to give keyboard input. */
4250 delete_keyboard_wait_descriptor (desc
)
4254 int lim
= max_keyboard_desc
;
4256 FD_CLR (desc
, &input_wait_mask
);
4257 FD_CLR (desc
, &non_process_wait_mask
);
4259 if (desc
== max_keyboard_desc
)
4260 for (fd
= 0; fd
< lim
; fd
++)
4261 if (FD_ISSET (fd
, &input_wait_mask
)
4262 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4263 max_keyboard_desc
= fd
;
4266 /* Return nonzero if *MASK has a bit set
4267 that corresponds to one of the keyboard input descriptors. */
4270 keyboard_bit_set (mask
)
4275 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4276 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4277 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4289 if (! noninteractive
|| initialized
)
4291 signal (SIGCHLD
, sigchld_handler
);
4294 FD_ZERO (&input_wait_mask
);
4295 FD_ZERO (&non_keyboard_wait_mask
);
4296 FD_ZERO (&non_process_wait_mask
);
4297 max_process_desc
= 0;
4299 FD_SET (0, &input_wait_mask
);
4301 Vprocess_alist
= Qnil
;
4302 for (i
= 0; i
< MAXDESC
; i
++)
4304 chan_process
[i
] = Qnil
;
4305 proc_buffered_char
[i
] = -1;
4307 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4308 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4313 Qprocessp
= intern ("processp");
4314 staticpro (&Qprocessp
);
4315 Qrun
= intern ("run");
4317 Qstop
= intern ("stop");
4319 Qsignal
= intern ("signal");
4320 staticpro (&Qsignal
);
4322 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4325 Qexit = intern ("exit");
4326 staticpro (&Qexit); */
4328 Qopen
= intern ("open");
4330 Qclosed
= intern ("closed");
4331 staticpro (&Qclosed
);
4333 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4334 staticpro (&Qlast_nonmenu_event
);
4336 staticpro (&Vprocess_alist
);
4338 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4339 "*Non-nil means delete processes immediately when they exit.\n\
4340 nil means don't delete them until `list-processes' is run.");
4342 delete_exited_processes
= 1;
4344 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4345 "Control type of device used to communicate with subprocesses.\n\
4346 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4347 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4348 then a pipe is used in any case.\n\
4349 The value takes effect when `start-process' is called.");
4350 Vprocess_connection_type
= Qt
;
4352 defsubr (&Sprocessp
);
4353 defsubr (&Sget_process
);
4354 defsubr (&Sget_buffer_process
);
4355 defsubr (&Sdelete_process
);
4356 defsubr (&Sprocess_status
);
4357 defsubr (&Sprocess_exit_status
);
4358 defsubr (&Sprocess_id
);
4359 defsubr (&Sprocess_name
);
4360 defsubr (&Sprocess_tty_name
);
4361 defsubr (&Sprocess_command
);
4362 defsubr (&Sset_process_buffer
);
4363 defsubr (&Sprocess_buffer
);
4364 defsubr (&Sprocess_mark
);
4365 defsubr (&Sset_process_filter
);
4366 defsubr (&Sprocess_filter
);
4367 defsubr (&Sset_process_sentinel
);
4368 defsubr (&Sprocess_sentinel
);
4369 defsubr (&Sset_process_window_size
);
4370 defsubr (&Sprocess_kill_without_query
);
4371 defsubr (&Sprocess_contact
);
4372 defsubr (&Slist_processes
);
4373 defsubr (&Sprocess_list
);
4374 defsubr (&Sstart_process
);
4376 defsubr (&Sopen_network_stream
);
4377 #endif /* HAVE_SOCKETS */
4378 defsubr (&Saccept_process_output
);
4379 defsubr (&Sprocess_send_region
);
4380 defsubr (&Sprocess_send_string
);
4381 defsubr (&Sinterrupt_process
);
4382 defsubr (&Skill_process
);
4383 defsubr (&Squit_process
);
4384 defsubr (&Sstop_process
);
4385 defsubr (&Scontinue_process
);
4386 defsubr (&Sprocess_send_eof
);
4387 defsubr (&Ssignal_process
);
4388 defsubr (&Swaiting_for_user_input_p
);
4389 /* defsubr (&Sprocess_connection); */
4390 defsubr (&Sset_process_coding_system
);
4391 defsubr (&Sprocess_coding_system
);
4395 #else /* not subprocesses */
4397 #include <sys/types.h>
4401 #include "systime.h"
4402 #include "termopts.h"
4403 #include "sysselect.h"
4405 extern int frame_garbaged
;
4407 extern EMACS_TIME
timer_check ();
4408 extern int timers_run
;
4410 /* As described above, except assuming that there are no subprocesses:
4412 Wait for timeout to elapse and/or keyboard input to be available.
4415 timeout in seconds, or
4416 zero for no limit, or
4417 -1 means gobble data immediately available but don't wait for any.
4419 read_kbd is a Lisp_Object:
4420 0 to ignore keyboard input, or
4421 1 to return when input is available, or
4422 -1 means caller will actually read the input, so don't throw to
4424 a cons cell, meaning wait until its car is non-nil
4425 (and gobble terminal input into the buffer if any arrives), or
4426 We know that read_kbd will never be a Lisp_Process, since
4427 `subprocesses' isn't defined.
4429 do_display != 0 means redisplay should be done to show subprocess
4430 output that arrives.
4432 Return true iff we received input from any process. */
4435 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4436 int time_limit
, microsecs
;
4437 Lisp_Object read_kbd
;
4440 EMACS_TIME end_time
, timeout
;
4441 SELECT_TYPE waitchannels
;
4443 Lisp_Object
*wait_for_cell
= 0;
4445 /* If waiting for non-nil in a cell, record where. */
4446 if (CONSP (read_kbd
))
4448 wait_for_cell
= &XCONS (read_kbd
)->car
;
4449 XSETFASTINT (read_kbd
, 0);
4452 /* What does time_limit really mean? */
4453 if (time_limit
|| microsecs
)
4455 if (time_limit
== -1)
4456 /* In fact, it's zero. */
4457 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4459 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4461 /* How far in the future is that? */
4462 EMACS_GET_TIME (end_time
);
4463 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4466 /* It's infinite. */
4467 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4469 /* Turn off periodic alarms (in case they are in use)
4470 because the select emulator uses alarms. */
4476 int timeout_reduced_for_timers
= 0;
4478 /* If calling from keyboard input, do not quit
4479 since we want to return C-g as an input character.
4480 Otherwise, do pending quit if requested. */
4481 if (XINT (read_kbd
) >= 0)
4484 /* Exit now if the cell we're waiting for became non-nil. */
4485 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4488 /* Compute time from now till when time limit is up */
4489 /* Exit if already run out */
4490 if (time_limit
> 0 || microsecs
)
4492 EMACS_GET_TIME (timeout
);
4493 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4494 if (EMACS_TIME_NEG_P (timeout
))
4498 /* If our caller will not immediately handle keyboard events,
4499 run timer events directly.
4500 (Callers that will immediately read keyboard events
4501 call timer_delay on their own.) */
4502 if (! wait_for_cell
)
4504 EMACS_TIME timer_delay
;
4508 old_timers_run
= timers_run
;
4509 timer_delay
= timer_check (1);
4510 if (timers_run
!= old_timers_run
&& do_display
)
4512 redisplay_preserve_echo_area ();
4513 /* We must retry, since a timer may have requeued itself
4514 and that could alter the time delay. */
4518 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4520 EMACS_TIME difference
;
4521 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4522 if (EMACS_TIME_NEG_P (difference
))
4524 timeout
= timer_delay
;
4525 timeout_reduced_for_timers
= 1;
4530 /* Cause C-g and alarm signals to take immediate action,
4531 and cause input available signals to zero out timeout. */
4532 if (XINT (read_kbd
) < 0)
4533 set_waiting_for_input (&timeout
);
4535 /* Wait till there is something to do. */
4537 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4538 FD_ZERO (&waitchannels
);
4540 FD_SET (0, &waitchannels
);
4542 /* If a frame has been newly mapped and needs updating,
4543 reprocess its display stuff. */
4544 if (frame_garbaged
&& do_display
)
4546 clear_waiting_for_input ();
4547 redisplay_preserve_echo_area ();
4548 if (XINT (read_kbd
) < 0)
4549 set_waiting_for_input (&timeout
);
4552 if (XINT (read_kbd
) && detect_input_pending ())
4555 FD_ZERO (&waitchannels
);
4558 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4563 /* Make C-g and alarm signals set flags again */
4564 clear_waiting_for_input ();
4566 /* If we woke up due to SIGWINCH, actually change size now. */
4567 do_pending_window_change ();
4569 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4570 /* We waited the full specified time, so return now. */
4575 /* If the system call was interrupted, then go around the
4577 if (xerrno
== EINTR
)
4578 FD_ZERO (&waitchannels
);
4580 error ("select error: %s", strerror (xerrno
));
4583 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4584 /* System sometimes fails to deliver SIGIO. */
4585 kill (getpid (), SIGIO
);
4588 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4589 kill (getpid (), SIGIO
);
4592 /* Check for keyboard input */
4594 if ((XINT (read_kbd
) != 0)
4595 && detect_input_pending_run_timers (do_display
))
4597 swallow_events (do_display
);
4598 if (detect_input_pending_run_timers (do_display
))
4602 /* If wait_for_cell. check for keyboard input
4603 but don't run any timers.
4604 ??? (It seems wrong to me to check for keyboard
4605 input at all when wait_for_cell, but the code
4606 has been this way since July 1994.
4607 Try changing this after version 19.31.) */
4609 && detect_input_pending ())
4611 swallow_events (do_display
);
4612 if (detect_input_pending ())
4616 /* Exit now if the cell we're waiting for became non-nil. */
4617 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4627 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4628 /* Don't confuse make-docfile by having two doc strings for this function.
4629 make-docfile does not pay attention to #if, for good reason! */
4632 register Lisp_Object name
;
4637 /* Kill all processes associated with `buffer'.
4638 If `buffer' is nil, kill all processes.
4639 Since we have no subprocesses, this does nothing. */
4641 kill_buffer_processes (buffer
)
4652 defsubr (&Sget_buffer_process
);
4656 #endif /* not subprocesses */