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
, Vdefault_file_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 in PATH.\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
;
1490 current_dir
= ENCODE_FILE (current_dir
);
1495 #endif /* not WINDOWSNT */
1497 int xforkin
= forkin
;
1498 int xforkout
= forkout
;
1500 #if 0 /* This was probably a mistake--it duplicates code later on,
1501 but fails to handle all the cases. */
1502 /* Make sure SIGCHLD is not blocked in the child. */
1503 sigsetmask (SIGEMPTYMASK
);
1506 /* Make the pty be the controlling terminal of the process. */
1508 /* First, disconnect its current controlling terminal. */
1510 /* We tried doing setsid only if pty_flag, but it caused
1511 process_set_signal to fail on SGI when using a pipe. */
1513 /* Make the pty's terminal the controlling terminal. */
1517 /* We ignore the return value
1518 because faith@cs.unc.edu says that is necessary on Linux. */
1519 ioctl (xforkin
, TIOCSCTTY
, 0);
1522 #else /* not HAVE_SETSID */
1524 /* It's very important to call setpgrp here and no time
1525 afterwards. Otherwise, we lose our controlling tty which
1526 is set when we open the pty. */
1529 #endif /* not HAVE_SETSID */
1530 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1531 if (pty_flag
&& xforkin
>= 0)
1534 tcgetattr (xforkin
, &t
);
1536 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1537 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1540 #if defined (NTTYDISC) && defined (TIOCSETD)
1541 if (pty_flag
&& xforkin
>= 0)
1543 /* Use new line discipline. */
1544 int ldisc
= NTTYDISC
;
1545 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1550 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1551 can do TIOCSPGRP only to the process's controlling tty. */
1554 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1555 I can't test it since I don't have 4.3. */
1556 int j
= open ("/dev/tty", O_RDWR
, 0);
1557 ioctl (j
, TIOCNOTTY
, 0);
1560 /* In order to get a controlling terminal on some versions
1561 of BSD, it is necessary to put the process in pgrp 0
1562 before it opens the terminal. */
1570 #endif /* TIOCNOTTY */
1572 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1573 /*** There is a suggestion that this ought to be a
1574 conditional on TIOCSPGRP,
1575 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1576 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1577 that system does seem to need this code, even though
1578 both HAVE_SETSID and TIOCSCTTY are defined. */
1579 /* Now close the pty (if we had it open) and reopen it.
1580 This makes the pty the controlling terminal of the subprocess. */
1583 #ifdef SET_CHILD_PTY_PGRP
1584 int pgrp
= getpid ();
1587 /* I wonder if close (open (pty_name, ...)) would work? */
1590 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1594 write (1, "Couldn't open the pty terminal ", 31);
1595 write (1, pty_name
, strlen (pty_name
));
1600 #ifdef SET_CHILD_PTY_PGRP
1601 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1602 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1605 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1607 #ifdef SETUP_SLAVE_PTY
1612 #endif /* SETUP_SLAVE_PTY */
1614 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1615 Now reenable it in the child, so it will die when we want it to. */
1617 signal (SIGHUP
, SIG_DFL
);
1619 #endif /* HAVE_PTYS */
1621 signal (SIGINT
, SIG_DFL
);
1622 signal (SIGQUIT
, SIG_DFL
);
1624 /* Stop blocking signals in the child. */
1625 #ifdef POSIX_SIGNALS
1626 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1627 #else /* !POSIX_SIGNALS */
1631 #else /* not BSD4_1 */
1632 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1633 sigsetmask (SIGEMPTYMASK
);
1634 #else /* ordinary USG */
1636 signal (SIGCHLD
, sigchld
);
1638 #endif /* ordinary USG */
1639 #endif /* not BSD4_1 */
1640 #endif /* SIGCHLD */
1641 #endif /* !POSIX_SIGNALS */
1644 child_setup_tty (xforkout
);
1646 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1647 new_argv
, 1, current_dir
);
1648 #else /* not WINDOWSNT */
1649 child_setup (xforkin
, xforkout
, xforkout
,
1650 new_argv
, 1, current_dir
);
1651 #endif /* not WINDOWSNT */
1653 environ
= save_environ
;
1658 /* This runs in the Emacs process. */
1663 if (forkin
!= forkout
&& forkout
>= 0)
1668 /* vfork succeeded. */
1669 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1672 register_child (pid
, inchannel
);
1673 #endif /* WINDOWSNT */
1675 /* If the subfork execv fails, and it exits,
1676 this close hangs. I don't know why.
1677 So have an interrupt jar it loose. */
1679 signal (SIGALRM
, create_process_1
);
1681 XPROCESS (process
)->subtty
= Qnil
;
1686 if (forkin
!= forkout
&& forkout
>= 0)
1691 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1694 XPROCESS (process
)->tty_name
= Qnil
;
1697 /* Restore the signal state whether vfork succeeded or not.
1698 (We will signal an error, below, if it failed.) */
1699 #ifdef POSIX_SIGNALS
1701 /* Restore the parent's signal handlers. */
1702 sigaction (SIGINT
, &sigint_action
, 0);
1703 sigaction (SIGQUIT
, &sigquit_action
, 0);
1705 sigaction (SIGHUP
, &sighup_action
, 0);
1707 #endif /* HAVE_VFORK */
1708 /* Stop blocking signals in the parent. */
1709 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1710 #else /* !POSIX_SIGNALS */
1714 #else /* not BSD4_1 */
1715 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1716 sigsetmask (SIGEMPTYMASK
);
1717 #else /* ordinary USG */
1719 signal (SIGCHLD
, sigchld
);
1720 /* Now really handle any of these signals
1721 that came in during this function. */
1722 if (sigchld_deferred
)
1723 kill (getpid (), SIGCHLD
);
1725 #endif /* ordinary USG */
1726 #endif /* not BSD4_1 */
1727 #endif /* SIGCHLD */
1728 #endif /* !POSIX_SIGNALS */
1730 /* Now generate the error if vfork failed. */
1732 report_file_error ("Doing vfork", Qnil
);
1734 #endif /* not VMS */
1738 /* open a TCP network connection to a given HOST/SERVICE. Treated
1739 exactly like a normal process when reading and writing. Only
1740 differences are in status display and process deletion. A network
1741 connection has no PID; you cannot signal it. All you can do is
1742 deactivate and close it via delete-process */
1744 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1746 "Open a TCP connection for a service to a host.\n\
1747 Returns a subprocess-object to represent the connection.\n\
1748 Input and output work as for subprocesses; `delete-process' closes it.\n\
1749 Args are NAME BUFFER HOST SERVICE.\n\
1750 NAME is name for process. It is modified if necessary to make it unique.\n\
1751 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1752 Process output goes at end of that buffer, unless you specify\n\
1753 an output stream or filter function to handle the output.\n\
1754 BUFFER may be also nil, meaning that this process is not associated\n\
1756 Third arg is name of the host to connect to, or its IP address.\n\
1757 Fourth arg SERVICE is name of the service desired, or an integer\n\
1758 specifying a port number to connect to.")
1759 (name
, buffer
, host
, service
)
1760 Lisp_Object name
, buffer
, host
, service
;
1764 struct sockaddr_in address
;
1765 struct servent
*svc_info
;
1766 struct hostent
*host_info_ptr
, host_info
;
1767 char *(addr_list
[2]);
1768 IN_ADDR numeric_addr
;
1772 struct hostent host_info_fixed
;
1773 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1775 int count
= specpdl_ptr
- specpdl
;
1778 /* Ensure socket support is loaded if available. */
1779 init_winsock (TRUE
);
1782 GCPRO4 (name
, buffer
, host
, service
);
1783 CHECK_STRING (name
, 0);
1784 CHECK_STRING (host
, 0);
1785 if (INTEGERP (service
))
1786 port
= htons ((unsigned short) XINT (service
));
1789 CHECK_STRING (service
, 0);
1790 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1792 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1793 port
= svc_info
->s_port
;
1796 /* Slow down polling to every ten seconds.
1797 Some kernels have a bug which causes retrying connect to fail
1798 after a connect. Polling can interfere with gethostbyname too. */
1799 #ifdef POLL_FOR_INPUT
1800 bind_polling_period (10);
1811 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1814 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1817 Fsleep_for (make_number (1), Qnil
);
1819 if (host_info_ptr
== 0)
1820 /* Attempt to interpret host as numeric inet address */
1822 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1823 if (NUMERIC_ADDR_ERROR
)
1824 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1826 host_info_ptr
= &host_info
;
1827 host_info
.h_name
= 0;
1828 host_info
.h_aliases
= 0;
1829 host_info
.h_addrtype
= AF_INET
;
1831 /* Older machines have only one address slot called h_addr.
1832 Newer machines have h_addr_list, but #define h_addr to
1833 be its first element. */
1834 host_info
.h_addr_list
= &(addr_list
[0]);
1836 host_info
.h_addr
= (char*)(&numeric_addr
);
1838 /* numeric_addr isn't null-terminated; it has fixed length. */
1839 host_info
.h_length
= sizeof (numeric_addr
);
1842 bzero (&address
, sizeof address
);
1843 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1844 host_info_ptr
->h_length
);
1845 address
.sin_family
= host_info_ptr
->h_addrtype
;
1846 address
.sin_port
= port
;
1848 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1850 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1852 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1853 when connect is interrupted. So let's not let it get interrupted.
1854 Note we do not turn off polling, because polling is only used
1855 when not interrupt_input, and thus not normally used on the systems
1856 which have this bug. On systems which use polling, there's no way
1857 to quit if polling is turned off. */
1858 if (interrupt_input
)
1866 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1867 && errno
!= EISCONN
)
1875 if (errno
== EADDRINUSE
&& retry
< 20)
1877 /* A delay here is needed on some FreeBSD systems,
1878 and it is harmless, since this retrying takes time anyway
1879 and should be infrequent. */
1880 Fsleep_for (make_number (1), Qnil
);
1887 if (interrupt_input
)
1891 report_file_error ("connection failed",
1892 Fcons (host
, Fcons (name
, Qnil
)));
1897 #ifdef POLL_FOR_INPUT
1898 unbind_to (count
, Qnil
);
1901 if (interrupt_input
)
1905 s
= connect_server (0);
1907 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1908 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1909 send_command (s
, C_DUMB
, 1, 0);
1916 buffer
= Fget_buffer_create (buffer
);
1917 proc
= make_process (name
);
1919 chan_process
[inch
] = proc
;
1922 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1925 fcntl (inch
, F_SETFL
, O_NDELAY
);
1929 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1930 XPROCESS (proc
)->command_channel_p
= Qnil
;
1931 XPROCESS (proc
)->buffer
= buffer
;
1932 XPROCESS (proc
)->sentinel
= Qnil
;
1933 XPROCESS (proc
)->filter
= Qnil
;
1934 XPROCESS (proc
)->command
= Qnil
;
1935 XPROCESS (proc
)->pid
= Qnil
;
1936 XSETINT (XPROCESS (proc
)->infd
, inch
);
1937 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1938 XPROCESS (proc
)->status
= Qrun
;
1939 FD_SET (inch
, &input_wait_mask
);
1940 FD_SET (inch
, &non_keyboard_wait_mask
);
1941 if (inch
> max_process_desc
)
1942 max_process_desc
= inch
;
1944 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1945 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1947 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1948 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1952 /* Setup coding systems for communicating with the network stream. */
1953 struct gcpro gcpro1
;
1954 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1955 Lisp_Object coding_systems
= Qt
;
1956 Lisp_Object args
[5], val
;
1958 if (!NILP (Vcoding_system_for_read
))
1959 val
= Vcoding_system_for_read
;
1960 else if (NILP (current_buffer
->enable_multibyte_characters
))
1961 /* We dare not decode end-of-line format by setting VAL to
1962 Qraw_text, because the existing Emacs Lisp libraries
1963 assume that they receive bare code including a sequene of
1968 args
[0] = Qopen_network_stream
, args
[1] = name
,
1969 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1971 coding_systems
= Ffind_operation_coding_system (5, args
);
1973 if (CONSP (coding_systems
))
1974 val
= XCONS (coding_systems
)->car
;
1975 else if (CONSP (Vdefault_process_coding_system
))
1976 val
= XCONS (Vdefault_process_coding_system
)->car
;
1980 XPROCESS (proc
)->decode_coding_system
= val
;
1982 if (!NILP (Vcoding_system_for_write
))
1983 val
= Vcoding_system_for_write
;
1984 else if (NILP (current_buffer
->enable_multibyte_characters
))
1988 if (EQ (coding_systems
, Qt
))
1990 args
[0] = Qopen_network_stream
, args
[1] = name
,
1991 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1993 coding_systems
= Ffind_operation_coding_system (5, args
);
1996 if (CONSP (coding_systems
))
1997 val
= XCONS (coding_systems
)->cdr
;
1998 else if (CONSP (Vdefault_process_coding_system
))
1999 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
2003 XPROCESS (proc
)->encode_coding_system
= val
;
2006 if (!proc_decode_coding_system
[inch
])
2007 proc_decode_coding_system
[inch
]
2008 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2009 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
2010 proc_decode_coding_system
[inch
]);
2011 if (!proc_encode_coding_system
[outch
])
2012 proc_encode_coding_system
[outch
]
2013 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2014 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
2015 proc_encode_coding_system
[outch
]);
2017 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
2018 XPROCESS (proc
)->decoding_carryover
= make_number (0);
2019 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
2020 XPROCESS (proc
)->encoding_carryover
= make_number (0);
2025 #endif /* HAVE_SOCKETS */
2028 deactivate_process (proc
)
2031 register int inchannel
, outchannel
;
2032 register struct Lisp_Process
*p
= XPROCESS (proc
);
2034 inchannel
= XINT (p
->infd
);
2035 outchannel
= XINT (p
->outfd
);
2039 /* Beware SIGCHLD hereabouts. */
2040 flush_pending_output (inchannel
);
2043 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
2044 sys$
dassgn (outchannel
);
2045 vs
= get_vms_process_pointer (p
->pid
);
2047 give_back_vms_process_stuff (vs
);
2051 if (outchannel
>= 0 && outchannel
!= inchannel
)
2055 XSETINT (p
->infd
, -1);
2056 XSETINT (p
->outfd
, -1);
2057 chan_process
[inchannel
] = Qnil
;
2058 FD_CLR (inchannel
, &input_wait_mask
);
2059 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
2060 if (inchannel
== max_process_desc
)
2063 /* We just closed the highest-numbered process input descriptor,
2064 so recompute the highest-numbered one now. */
2065 max_process_desc
= 0;
2066 for (i
= 0; i
< MAXDESC
; i
++)
2067 if (!NILP (chan_process
[i
]))
2068 max_process_desc
= i
;
2073 /* Close all descriptors currently in use for communication
2074 with subprocess. This is used in a newly-forked subprocess
2075 to get rid of irrelevant descriptors. */
2078 close_process_descs ()
2082 for (i
= 0; i
< MAXDESC
; i
++)
2084 Lisp_Object process
;
2085 process
= chan_process
[i
];
2086 if (!NILP (process
))
2088 int in
= XINT (XPROCESS (process
)->infd
);
2089 int out
= XINT (XPROCESS (process
)->outfd
);
2092 if (out
>= 0 && in
!= out
)
2099 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2101 "Allow any pending output from subprocesses to be read by Emacs.\n\
2102 It is read into the process' buffers or given to their filter functions.\n\
2103 Non-nil arg PROCESS means do not return until some output has been received\n\
2105 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2106 seconds and microseconds to wait; return after that much time whether\n\
2107 or not there is input.\n\
2108 Return non-nil iff we received any output before the timeout expired.")
2109 (process
, timeout
, timeout_msecs
)
2110 register Lisp_Object process
, timeout
, timeout_msecs
;
2115 if (! NILP (timeout_msecs
))
2117 CHECK_NUMBER (timeout_msecs
, 2);
2118 useconds
= XINT (timeout_msecs
);
2119 if (!INTEGERP (timeout
))
2120 XSETINT (timeout
, 0);
2123 int carry
= useconds
/ 1000000;
2125 XSETINT (timeout
, XINT (timeout
) + carry
);
2126 useconds
-= carry
* 1000000;
2128 /* I think this clause is necessary because C doesn't
2129 guarantee a particular rounding direction for negative
2133 XSETINT (timeout
, XINT (timeout
) - 1);
2134 useconds
+= 1000000;
2141 if (! NILP (timeout
))
2143 CHECK_NUMBER (timeout
, 1);
2144 seconds
= XINT (timeout
);
2145 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2157 XSETFASTINT (process
, 0);
2160 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2164 /* This variable is different from waiting_for_input in keyboard.c.
2165 It is used to communicate to a lisp process-filter/sentinel (via the
2166 function Fwaiting_for_user_input_p below) whether emacs was waiting
2167 for user-input when that process-filter was called.
2168 waiting_for_input cannot be used as that is by definition 0 when
2169 lisp code is being evalled.
2170 This is also used in record_asynch_buffer_change.
2171 For that purpose, this must be 0
2172 when not inside wait_reading_process_input. */
2173 static int waiting_for_user_input_p
;
2175 /* This is here so breakpoints can be put on it. */
2177 wait_reading_process_input_1 ()
2181 /* Read and dispose of subprocess output while waiting for timeout to
2182 elapse and/or keyboard input to be available.
2185 timeout in seconds, or
2186 zero for no limit, or
2187 -1 means gobble data immediately available but don't wait for any.
2190 an additional duration to wait, measured in microseconds.
2191 If this is nonzero and time_limit is 0, then the timeout
2192 consists of MICROSECS only.
2194 READ_KBD is a lisp value:
2195 0 to ignore keyboard input, or
2196 1 to return when input is available, or
2197 -1 meaning caller will actually read the input, so don't throw to
2198 the quit handler, or
2199 a cons cell, meaning wait until its car is non-nil
2200 (and gobble terminal input into the buffer if any arrives), or
2201 a process object, meaning wait until something arrives from that
2202 process. The return value is true iff we read some input from
2205 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2206 output that arrives.
2208 If READ_KBD is a pointer to a struct Lisp_Process, then the
2209 function returns true iff we received input from that process
2210 before the timeout elapsed.
2211 Otherwise, return true iff we received input from any process. */
2213 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2214 int time_limit
, microsecs
;
2215 Lisp_Object read_kbd
;
2218 register int channel
, nfds
, m
;
2219 static SELECT_TYPE Available
;
2222 EMACS_TIME timeout
, end_time
, garbage
;
2224 int wait_channel
= -1;
2225 struct Lisp_Process
*wait_proc
= 0;
2226 int got_some_input
= 0;
2227 Lisp_Object
*wait_for_cell
= 0;
2229 FD_ZERO (&Available
);
2231 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2233 if (PROCESSP (read_kbd
))
2235 wait_proc
= XPROCESS (read_kbd
);
2236 wait_channel
= XINT (wait_proc
->infd
);
2237 XSETFASTINT (read_kbd
, 0);
2240 /* If waiting for non-nil in a cell, record where. */
2241 if (CONSP (read_kbd
))
2243 wait_for_cell
= &XCONS (read_kbd
)->car
;
2244 XSETFASTINT (read_kbd
, 0);
2247 waiting_for_user_input_p
= XINT (read_kbd
);
2249 /* Since we may need to wait several times,
2250 compute the absolute time to return at. */
2251 if (time_limit
|| microsecs
)
2253 EMACS_GET_TIME (end_time
);
2254 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2255 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2258 /* AlainF 5-Jul-1996
2259 HP-UX 10.10 seem to have problems with signals coming in
2260 Causes "poll: interrupted system call" messages when Emacs is run
2262 Turn off periodic alarms (in case they are in use) */
2268 int timeout_reduced_for_timers
= 0;
2270 /* If calling from keyboard input, do not quit
2271 since we want to return C-g as an input character.
2272 Otherwise, do pending quit if requested. */
2273 if (XINT (read_kbd
) >= 0)
2276 /* Exit now if the cell we're waiting for became non-nil. */
2277 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2280 /* Compute time from now till when time limit is up */
2281 /* Exit if already run out */
2282 if (time_limit
== -1)
2284 /* -1 specified for timeout means
2285 gobble output available now
2286 but don't wait at all. */
2288 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2290 else if (time_limit
|| microsecs
)
2292 EMACS_GET_TIME (timeout
);
2293 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2294 if (EMACS_TIME_NEG_P (timeout
))
2299 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2302 /* Normally we run timers here.
2303 But not if wait_for_cell; in those cases,
2304 the wait is supposed to be short,
2305 and those callers cannot handle running arbitrary Lisp code here. */
2306 if (! wait_for_cell
)
2308 EMACS_TIME timer_delay
;
2312 old_timers_run
= timers_run
;
2313 timer_delay
= timer_check (1);
2314 if (timers_run
!= old_timers_run
&& do_display
)
2316 redisplay_preserve_echo_area ();
2317 /* We must retry, since a timer may have requeued itself
2318 and that could alter the time_delay. */
2322 /* If there is unread keyboard input, also return. */
2323 if (XINT (read_kbd
) != 0
2324 && requeued_events_pending_p ())
2327 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2329 EMACS_TIME difference
;
2330 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2331 if (EMACS_TIME_NEG_P (difference
))
2333 timeout
= timer_delay
;
2334 timeout_reduced_for_timers
= 1;
2337 /* If time_limit is -1, we are not going to wait at all. */
2338 else if (time_limit
!= -1)
2340 /* This is so a breakpoint can be put here. */
2341 wait_reading_process_input_1 ();
2345 /* Cause C-g and alarm signals to take immediate action,
2346 and cause input available signals to zero out timeout.
2348 It is important that we do this before checking for process
2349 activity. If we get a SIGCHLD after the explicit checks for
2350 process activity, timeout is the only way we will know. */
2351 if (XINT (read_kbd
) < 0)
2352 set_waiting_for_input (&timeout
);
2354 /* If status of something has changed, and no input is
2355 available, notify the user of the change right away. After
2356 this explicit check, we'll let the SIGCHLD handler zap
2357 timeout to get our attention. */
2358 if (update_tick
!= process_tick
&& do_display
)
2360 Atemp
= input_wait_mask
;
2361 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2362 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
2363 &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2367 /* It's okay for us to do this and then continue with
2368 the loop, since timeout has already been zeroed out. */
2369 clear_waiting_for_input ();
2374 /* Don't wait for output from a non-running process. */
2375 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2376 update_status (wait_proc
);
2378 && ! EQ (wait_proc
->status
, Qrun
))
2380 int nread
, total_nread
= 0;
2382 clear_waiting_for_input ();
2383 XSETPROCESS (proc
, wait_proc
);
2385 /* Read data from the process, until we exhaust it. */
2386 while (XINT (wait_proc
->infd
) >= 0
2388 = read_process_output (proc
, XINT (wait_proc
->infd
))))
2391 total_nread
+= nread
;
2393 else if (nread
== -1 && EIO
== errno
)
2397 if (total_nread
> 0 && do_display
)
2398 redisplay_preserve_echo_area ();
2403 /* Wait till there is something to do */
2406 Available
= non_process_wait_mask
;
2407 else if (! XINT (read_kbd
))
2408 Available
= non_keyboard_wait_mask
;
2410 Available
= input_wait_mask
;
2412 /* If frame size has changed or the window is newly mapped,
2413 redisplay now, before we start to wait. There is a race
2414 condition here; if a SIGIO arrives between now and the select
2415 and indicates that a frame is trashed, the select may block
2416 displaying a trashed screen. */
2417 if (frame_garbaged
&& do_display
)
2419 clear_waiting_for_input ();
2420 redisplay_preserve_echo_area ();
2421 if (XINT (read_kbd
) < 0)
2422 set_waiting_for_input (&timeout
);
2425 if (XINT (read_kbd
) && detect_input_pending ())
2428 FD_ZERO (&Available
);
2431 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
2432 &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2437 /* Make C-g and alarm signals set flags again */
2438 clear_waiting_for_input ();
2440 /* If we woke up due to SIGWINCH, actually change size now. */
2441 do_pending_window_change ();
2443 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2444 /* We wanted the full specified time, so return now. */
2448 if (xerrno
== EINTR
)
2449 FD_ZERO (&Available
);
2451 /* Ultrix select seems to return ENOMEM when it is
2452 interrupted. Treat it just like EINTR. Bleah. Note
2453 that we want to test for the "ultrix" CPP symbol, not
2454 "__ultrix__"; the latter is only defined under GCC, but
2455 not by DEC's bundled CC. -JimB */
2456 else if (xerrno
== ENOMEM
)
2457 FD_ZERO (&Available
);
2460 /* This happens for no known reason on ALLIANT.
2461 I am guessing that this is the right response. -- RMS. */
2462 else if (xerrno
== EFAULT
)
2463 FD_ZERO (&Available
);
2465 else if (xerrno
== EBADF
)
2468 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2469 the child's closure of the pts gives the parent a SIGHUP, and
2470 the ptc file descriptor is automatically closed,
2471 yielding EBADF here or at select() call above.
2472 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2473 in m/ibmrt-aix.h), and here we just ignore the select error.
2474 Cleanup occurs c/o status_notify after SIGCLD. */
2475 FD_ZERO (&Available
); /* Cannot depend on values returned */
2481 error ("select error: %s", strerror (xerrno
));
2483 #if defined(sun) && !defined(USG5_4)
2484 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2486 /* System sometimes fails to deliver SIGIO.
2488 David J. Mackenzie says that Emacs doesn't compile under
2489 Solaris if this code is enabled, thus the USG5_4 in the CPP
2490 conditional. "I haven't noticed any ill effects so far.
2491 If you find a Solaris expert somewhere, they might know
2493 kill (getpid (), SIGIO
);
2496 #if 0 /* When polling is used, interrupt_input is 0,
2497 so get_input_pending should read the input.
2498 So this should not be needed. */
2499 /* If we are using polling for input,
2500 and we see input available, make it get read now.
2501 Otherwise it might not actually get read for a second.
2502 And on hpux, since we turn off polling in wait_reading_process_input,
2503 it might never get read at all if we don't spend much time
2504 outside of wait_reading_process_input. */
2505 if (XINT (read_kbd
) && interrupt_input
2506 && keyboard_bit_set (&Available
)
2507 && input_polling_used ())
2508 kill (getpid (), SIGALRM
);
2511 /* Check for keyboard input */
2512 /* If there is any, return immediately
2513 to give it higher priority than subprocesses */
2515 if (XINT (read_kbd
) != 0
2516 && detect_input_pending_run_timers (do_display
))
2518 swallow_events (do_display
);
2519 if (detect_input_pending_run_timers (do_display
))
2523 /* If there is unread keyboard input, also return. */
2524 if (XINT (read_kbd
) != 0
2525 && requeued_events_pending_p ())
2528 /* If we are not checking for keyboard input now,
2529 do process events (but don't run any timers).
2530 This is so that X events will be processed.
2531 Otherwise they may have to wait until polling takes place.
2532 That would causes delays in pasting selections, for example.
2534 (We used to do this only if wait_for_cell.) */
2535 if (XINT (read_kbd
) == 0 && detect_input_pending ())
2537 swallow_events (do_display
);
2538 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
2539 if (detect_input_pending ())
2544 /* Exit now if the cell we're waiting for became non-nil. */
2545 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2549 /* If we think we have keyboard input waiting, but didn't get SIGIO,
2550 go read it. This can happen with X on BSD after logging out.
2551 In that case, there really is no input and no SIGIO,
2552 but select says there is input. */
2554 if (XINT (read_kbd
) && interrupt_input
2555 && keyboard_bit_set (&Available
))
2556 kill (getpid (), SIGIO
);
2560 got_some_input
|= nfds
> 0;
2562 /* If checking input just got us a size-change event from X,
2563 obey it now if we should. */
2564 if (XINT (read_kbd
) || wait_for_cell
)
2565 do_pending_window_change ();
2567 /* Check for data from a process. */
2568 /* Really FIRST_PROC_DESC should be 0 on Unix,
2569 but this is safer in the short run. */
2570 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2572 if (FD_ISSET (channel
, &Available
)
2573 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2577 /* If waiting for this channel, arrange to return as
2578 soon as no more input to be processed. No more
2580 if (wait_channel
== channel
)
2586 proc
= chan_process
[channel
];
2590 /* Read data from the process, starting with our
2591 buffered-ahead character if we have one. */
2593 nread
= read_process_output (proc
, channel
);
2596 /* Since read_process_output can run a filter,
2597 which can call accept-process-output,
2598 don't try to read from any other processes
2599 before doing the select again. */
2600 FD_ZERO (&Available
);
2603 redisplay_preserve_echo_area ();
2606 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2609 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2610 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2612 else if (nread
== -1 && errno
== EAGAIN
)
2616 else if (nread
== -1 && errno
== EAGAIN
)
2618 /* Note that we cannot distinguish between no input
2619 available now and a closed pipe.
2620 With luck, a closed pipe will be accompanied by
2621 subprocess termination and SIGCHLD. */
2622 else if (nread
== 0 && !NETCONN_P (proc
))
2624 #endif /* O_NDELAY */
2625 #endif /* O_NONBLOCK */
2627 /* On some OSs with ptys, when the process on one end of
2628 a pty exits, the other end gets an error reading with
2629 errno = EIO instead of getting an EOF (0 bytes read).
2630 Therefore, if we get an error reading and errno =
2631 EIO, just continue, because the child process has
2632 exited and should clean itself up soon (e.g. when we
2634 else if (nread
== -1 && errno
== EIO
)
2636 #endif /* HAVE_PTYS */
2637 /* If we can detect process termination, don't consider the process
2638 gone just because its pipe is closed. */
2640 else if (nread
== 0 && !NETCONN_P (proc
))
2645 /* Preserve status of processes already terminated. */
2646 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2647 deactivate_process (proc
);
2648 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2649 update_status (XPROCESS (proc
));
2650 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2651 XPROCESS (proc
)->status
2652 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2655 } /* end for each file descriptor */
2656 } /* end while exit conditions not met */
2658 waiting_for_user_input_p
= 0;
2660 /* If calling from keyboard input, do not quit
2661 since we want to return C-g as an input character.
2662 Otherwise, do pending quit if requested. */
2663 if (XINT (read_kbd
) >= 0)
2665 /* Prevent input_pending from remaining set if we quit. */
2666 clear_input_pending ();
2670 /* AlainF 5-Jul-1996
2671 HP-UX 10.10 seems to have problems with signals coming in
2672 Causes "poll: interrupted system call" messages when Emacs is run
2674 Turn periodic alarms back on */
2678 return got_some_input
;
2681 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2684 read_process_output_call (fun_and_args
)
2685 Lisp_Object fun_and_args
;
2687 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2691 read_process_output_error_handler (error
)
2694 cmd_error_internal (error
, "error in process filter: ");
2696 update_echo_area ();
2697 Fsleep_for (make_number (2), Qnil
);
2700 /* Read pending output from the process channel,
2701 starting with our buffered-ahead character if we have one.
2702 Yield number of decoded characters read.
2704 This function reads at most 1024 characters.
2705 If you want to read all available subprocess output,
2706 you must call it repeatedly until it returns zero.
2708 The characters read are decoded according to PROC's coding-system
2711 read_process_output (proc
, channel
)
2713 register int channel
;
2715 register int nchars
, nbytes
;
2718 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2722 register Lisp_Object outstream
;
2723 register struct buffer
*old
= current_buffer
;
2724 register struct Lisp_Process
*p
= XPROCESS (proc
);
2725 register int opoint
;
2726 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2727 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2728 XSTRING (p->decoding_buf)->data. */
2729 int carryover
= XINT (p
->decoding_carryover
);
2732 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2734 vs
= get_vms_process_pointer (p
->pid
);
2738 return(0); /* Really weird if it does this */
2739 if (!(vs
->iosb
[0] & 1))
2740 return -1; /* I/O error */
2743 error ("Could not get VMS process pointer");
2744 chars
= vs
->inputBuffer
;
2745 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2748 start_vms_process_read (vs
); /* Crank up the next read on the process */
2749 return 1; /* Nothing worth printing, say we got 1 */
2753 /* The data carried over in the previous decoding (which are at
2754 the tail of decoding buffer) should be prepended to the new
2755 data read to decode all together. */
2756 char *buf
= (char *) xmalloc (nbytes
+ carryover
);
2758 bcopy (XSTRING (p
->decoding_buf
)->data
2759 + XSTRING (p
->decoding_buf
)->size_byte
- carryover
,
2761 bcopy (chars
, buf
+ carryover
, nbytes
);
2763 chars_allocated
= 1;
2768 /* See the comment above. */
2769 bcopy (XSTRING (p
->decoding_buf
)->data
2770 + XSTRING (p
->decoding_buf
)->size_byte
- carryover
,
2773 if (proc_buffered_char
[channel
] < 0)
2774 nbytes
= read (channel
, buf
+ carryover
, (sizeof buf
) - carryover
);
2777 buf
[carryover
] = proc_buffered_char
[channel
];
2778 proc_buffered_char
[channel
] = -1;
2779 nbytes
= read (channel
, buf
+ carryover
+ 1,
2780 (sizeof buf
) - carryover
- 1);
2784 nbytes
= nbytes
+ 1;
2787 #endif /* not VMS */
2789 /* At this point, NBYTES holds number of characters just received
2790 (including the one in proc_buffered_char[channel]). */
2791 if (nbytes
<= 0) return nbytes
;
2793 /* Now set NBYTES how many bytes we must decode. */
2794 nbytes
+= carryover
;
2797 if (CODING_MAY_REQUIRE_DECODING (coding
))
2799 int require
= decoding_buffer_size (coding
, nbytes
);
2802 if (XSTRING (p
->decoding_buf
)->size_byte
< require
)
2803 p
->decoding_buf
= make_uninit_string (require
);
2804 result
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2805 nbytes
, XSTRING (p
->decoding_buf
)->size_byte
);
2806 carryover
= nbytes
- coding
->consumed
;
2808 /* A new coding system might be found by `decode_coding'. */
2809 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2811 p
->decode_coding_system
= coding
->symbol
;
2813 /* Don't call setup_coding_system for
2814 proc_decode_coding_system[channel] here. It is done in
2815 detect_coding called via decode_coding above. */
2817 /* If a coding system for encoding is not yet decided, we set
2818 it as the same as coding-system for decoding.
2820 But, before doing that we must check if
2821 proc_encode_coding_system[p->outfd] surely points to a
2822 valid memory because p->outfd will be changed once EOF is
2823 sent to the process. */
2824 if (NILP (p
->encode_coding_system
)
2825 && proc_encode_coding_system
[p
->outfd
])
2827 p
->encode_coding_system
= coding
->symbol
;
2828 setup_coding_system (coding
->symbol
,
2829 proc_encode_coding_system
[p
->outfd
]);
2834 /* Now we don't need the contents of `chars'. */
2835 if (chars_allocated
)
2838 if (coding
->produced
== 0)
2840 chars
= (char *) XSTRING (p
->decoding_buf
)->data
;
2841 nbytes
= coding
->produced
;
2842 nchars
= coding
->produced_char
;
2843 chars_in_decoding_buf
= 1;
2846 else if (chars_allocated
)
2848 /* Although we don't have to decode the received data, we must
2849 move it to an area which we don't have to free. */
2850 if (! STRINGP (p
->decoding_buf
)
2851 || XSTRING (p
->decoding_buf
)->size
< nbytes
)
2852 p
->decoding_buf
= make_uninit_string (nbytes
);
2853 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nbytes
);
2855 chars
= XSTRING (p
->decoding_buf
)->data
;
2856 chars_in_decoding_buf
= 1;
2861 XSETINT (p
->decoding_carryover
, carryover
);
2862 Vlast_coding_system_used
= coding
->symbol
;
2864 /* Read and dispose of the process output. */
2865 outstream
= p
->filter
;
2866 if (!NILP (outstream
))
2868 /* We inhibit quit here instead of just catching it so that
2869 hitting ^G when a filter happens to be running won't screw
2871 int count
= specpdl_ptr
- specpdl
;
2872 Lisp_Object odeactivate
;
2873 Lisp_Object obuffer
, okeymap
;
2875 int outer_running_asynch_code
= running_asynch_code
;
2877 /* No need to gcpro these, because all we do with them later
2878 is test them for EQness, and none of them should be a string. */
2879 odeactivate
= Vdeactivate_mark
;
2880 XSETBUFFER (obuffer
, current_buffer
);
2881 okeymap
= current_buffer
->keymap
;
2883 specbind (Qinhibit_quit
, Qt
);
2884 specbind (Qlast_nonmenu_event
, Qt
);
2886 /* In case we get recursively called,
2887 and we already saved the match data nonrecursively,
2888 save the same match data in safely recursive fashion. */
2889 if (outer_running_asynch_code
)
2892 /* Don't clobber the CURRENT match data, either! */
2893 tem
= Fmatch_data (Qnil
, Qnil
);
2894 restore_match_data ();
2895 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
2896 Fset_match_data (tem
);
2899 /* For speed, if a search happens within this code,
2900 save the match data in a special nonrecursive fashion. */
2901 running_asynch_code
= 1;
2903 text
= make_multibyte_string (chars
, nchars
, nbytes
);
2904 internal_condition_case_1 (read_process_output_call
,
2906 Fcons (proc
, Fcons (text
, Qnil
))),
2907 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2908 read_process_output_error_handler
);
2910 /* If we saved the match data nonrecursively, restore it now. */
2911 restore_match_data ();
2912 running_asynch_code
= outer_running_asynch_code
;
2914 /* Handling the process output should not deactivate the mark. */
2915 Vdeactivate_mark
= odeactivate
;
2917 #if 0 /* Call record_asynch_buffer_change unconditionally,
2918 because we might have changed minor modes or other things
2919 that affect key bindings. */
2920 if (! EQ (Fcurrent_buffer (), obuffer
)
2921 || ! EQ (current_buffer
->keymap
, okeymap
))
2923 /* But do it only if the caller is actually going to read events.
2924 Otherwise there's no need to make him wake up, and it could
2925 cause trouble (for example it would make Fsit_for return). */
2926 if (waiting_for_user_input_p
== -1)
2927 record_asynch_buffer_change ();
2930 start_vms_process_read (vs
);
2932 unbind_to (count
, Qnil
);
2936 /* If no filter, write into buffer if it isn't dead. */
2937 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2939 Lisp_Object old_read_only
;
2940 int old_begv
, old_zv
;
2941 int old_begv_byte
, old_zv_byte
;
2942 Lisp_Object odeactivate
;
2943 int before
, before_byte
;
2946 odeactivate
= Vdeactivate_mark
;
2948 Fset_buffer (p
->buffer
);
2950 opoint_byte
= PT_BYTE
;
2951 old_read_only
= current_buffer
->read_only
;
2954 old_begv_byte
= BEGV_BYTE
;
2955 old_zv_byte
= ZV_BYTE
;
2957 current_buffer
->read_only
= Qnil
;
2959 /* Insert new output into buffer
2960 at the current end-of-output marker,
2961 thus preserving logical ordering of input and output. */
2962 if (XMARKER (p
->mark
)->buffer
)
2963 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
2964 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
2967 SET_PT_BOTH (ZV
, ZV_BYTE
);
2969 before_byte
= PT_BYTE
;
2971 /* If the output marker is outside of the visible region, save
2972 the restriction and widen. */
2973 if (! (BEGV
<= PT
&& PT
<= ZV
))
2976 /* Insert before markers in case we are inserting where
2977 the buffer's mark is, and the user's next command is Meta-y. */
2978 if (chars_in_decoding_buf
)
2979 insert_from_string_before_markers (p
->decoding_buf
, 0, 0,
2982 insert_1_both (chars
, nchars
, nbytes
, 0, 1, 1);
2983 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
2985 update_mode_lines
++;
2987 /* Make sure opoint and the old restrictions
2988 float ahead of any new text just as point would. */
2989 if (opoint
>= before
)
2991 opoint
+= PT
- before
;
2992 opoint_byte
+= PT_BYTE
- before_byte
;
2994 if (old_begv
> before
)
2996 old_begv
+= PT
- before
;
2997 old_begv_byte
+= PT_BYTE
- before_byte
;
2999 if (old_zv
>= before
)
3001 old_zv
+= PT
- before
;
3002 old_zv_byte
+= PT_BYTE
- before_byte
;
3005 /* If the restriction isn't what it should be, set it. */
3006 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
3007 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
3009 /* Handling the process output should not deactivate the mark. */
3010 Vdeactivate_mark
= odeactivate
;
3012 current_buffer
->read_only
= old_read_only
;
3013 SET_PT_BOTH (opoint
, opoint_byte
);
3014 set_buffer_internal (old
);
3017 start_vms_process_read (vs
);
3022 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
3024 "Returns non-nil if emacs is waiting for input from the user.\n\
3025 This is intended for use by asynchronous process output filters and sentinels.")
3028 return (waiting_for_user_input_p
? Qt
: Qnil
);
3031 /* Sending data to subprocess */
3033 jmp_buf send_process_frame
;
3036 send_process_trap ()
3042 longjmp (send_process_frame
, 1);
3045 /* Send some data to process PROC.
3046 BUF is the beginning of the data; LEN is the number of characters.
3047 OBJECT is the Lisp object that the data comes from.
3049 The data is encoded by PROC's coding-system for encoding before it
3050 is sent. But if the data ends at the middle of multi-byte
3051 representation, that incomplete sequence of bytes are sent without
3052 being encoded. Should we store them in a buffer to prepend them to
3053 the data send later? */
3055 send_process (proc
, buf
, len
, object
)
3056 volatile Lisp_Object proc
;
3061 /* Use volatile to protect variables from being clobbered by longjmp. */
3063 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
3064 struct coding_system
*coding
;
3065 struct gcpro gcpro1
;
3066 int carryover
= XINT (XPROCESS (proc
)->encoding_carryover
);
3071 struct Lisp_Process
*p
= XPROCESS (proc
);
3072 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
3075 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3076 update_status (XPROCESS (proc
));
3077 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3078 error ("Process %s not running", procname
);
3079 if (XINT (XPROCESS (proc
)->outfd
) < 0)
3080 error ("Output file descriptor of %s is closed", procname
);
3082 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3083 Vlast_coding_system_used
= coding
->symbol
;
3085 if (CODING_REQUIRE_ENCODING (coding
))
3087 int require
= encoding_buffer_size (coding
, len
);
3089 unsigned char *temp_buf
= NULL
;
3091 /* Remember the offset of data because a string or a buffer may
3092 be relocated. Setting OFFSET to -1 means we don't have to
3094 offset
= (BUFFERP (object
)
3095 ? BUF_PTR_BYTE_POS (XBUFFER (object
), buf
)
3097 ? offset
= buf
- XSTRING (object
)->data
3102 temp_buf
= (unsigned char *) xmalloc (len
+ carryover
);
3106 if (BUFFERP (object
))
3107 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3108 else if (STRINGP (object
))
3109 buf
= offset
+ XSTRING (object
)->data
;
3110 /* Now we don't have to care relocation. */
3113 bcopy ((XSTRING (XPROCESS (proc
)->encoding_buf
)->data
3114 + XSTRING (XPROCESS (proc
)->encoding_buf
)->size_byte
3118 bcopy (buf
, temp_buf
+ carryover
, len
);
3122 if (XSTRING (XPROCESS (proc
)->encoding_buf
)->size_byte
< require
)
3124 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
3128 if (BUFFERP (object
))
3129 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3130 else if (STRINGP (object
))
3131 buf
= offset
+ XSTRING (object
)->data
;
3134 object
= XPROCESS (proc
)->encoding_buf
;
3135 encode_coding (coding
, buf
, XSTRING (object
)->data
,
3136 len
, XSTRING (object
)->size_byte
);
3137 len
= coding
->produced
;
3138 buf
= XSTRING (object
)->data
;
3144 vs
= get_vms_process_pointer (p
->pid
);
3146 error ("Could not find this process: %x", p
->pid
);
3147 else if (write_to_vms_process (vs
, buf
, len
))
3151 if (pty_max_bytes
== 0)
3153 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3154 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3156 if (pty_max_bytes
< 0)
3157 pty_max_bytes
= 250;
3159 pty_max_bytes
= 250;
3161 /* Deduct one, to leave space for the eof. */
3165 if (!setjmp (send_process_frame
))
3169 SIGTYPE (*old_sigpipe
)();
3172 /* Decide how much data we can send in one batch.
3173 Long lines need to be split into multiple batches. */
3174 if (!NILP (XPROCESS (proc
)->pty_flag
))
3176 /* Starting this at zero is always correct when not the first iteration
3177 because the previous iteration ended by sending C-d.
3178 It may not be correct for the first iteration
3179 if a partial line was sent in a separate send_process call.
3180 If that proves worth handling, we need to save linepos
3181 in the process object. */
3183 unsigned char *ptr
= buf
;
3184 unsigned char *end
= buf
+ len
;
3186 /* Scan through this text for a line that is too long. */
3187 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3195 /* If we found one, break the line there
3196 and put in a C-d to force the buffer through. */
3200 /* Send this batch, using one or more write calls. */
3203 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3204 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3205 signal (SIGPIPE
, old_sigpipe
);
3211 || errno
== EWOULDBLOCK
3217 /* Buffer is full. Wait, accepting input;
3218 that may allow the program
3219 to finish doing output and read more. */
3224 /* Running filters might relocate buffers or strings.
3225 Arrange to relocate BUF. */
3226 if (BUFFERP (object
))
3227 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
3228 else if (STRINGP (object
))
3229 offset
= buf
- XSTRING (object
)->data
;
3231 XSETFASTINT (zero
, 0);
3232 #ifdef EMACS_HAS_USECS
3233 wait_reading_process_input (0, 20000, zero
, 0);
3235 wait_reading_process_input (1, 0, zero
, 0);
3238 if (BUFFERP (object
))
3239 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3240 else if (STRINGP (object
))
3241 buf
= offset
+ XSTRING (object
)->data
;
3246 /* This is a real error. */
3247 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3254 /* If we sent just part of the string, put in an EOF
3255 to force it through, before we send the rest. */
3257 Fprocess_send_eof (proc
);
3262 XPROCESS (proc
)->raw_status_low
= Qnil
;
3263 XPROCESS (proc
)->raw_status_high
= Qnil
;
3264 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3265 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3266 deactivate_process (proc
);
3268 error ("Error writing to process %s; closed it", procname
);
3270 error ("SIGPIPE raised on process %s; closed it", procname
);
3277 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3279 "Send current contents of region as input to PROCESS.\n\
3280 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3281 nil, indicating the current buffer's process.\n\
3282 Called from program, takes three arguments, PROCESS, START and END.\n\
3283 If the region is more than 500 characters long,\n\
3284 it is sent in several bunches. This may happen even for shorter regions.\n\
3285 Output from processes can arrive in between bunches.")
3286 (process
, start
, end
)
3287 Lisp_Object process
, start
, end
;
3292 proc
= get_process (process
);
3293 validate_region (&start
, &end
);
3295 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3296 move_gap (XINT (start
));
3298 start1
= CHAR_TO_BYTE (XINT (start
));
3299 end1
= CHAR_TO_BYTE (XINT (end
));
3300 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
3301 Fcurrent_buffer ());
3306 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3308 "Send PROCESS the contents of STRING as input.\n\
3309 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3310 nil, indicating the current buffer's process.\n\
3311 If STRING is more than 500 characters long,\n\
3312 it is sent in several bunches. This may happen even for shorter strings.\n\
3313 Output from processes can arrive in between bunches.")
3315 Lisp_Object process
, string
;
3318 CHECK_STRING (string
, 1);
3319 proc
= get_process (process
);
3320 send_process (proc
, XSTRING (string
)->data
,
3321 XSTRING (string
)->size_byte
, string
);
3325 /* send a signal number SIGNO to PROCESS.
3326 CURRENT_GROUP means send to the process group that currently owns
3327 the terminal being used to communicate with PROCESS.
3328 This is used for various commands in shell mode.
3329 If NOMSG is zero, insert signal-announcements into process's buffers
3332 If we can, we try to signal PROCESS by sending control characters
3333 down the pty. This allows us to signal inferiors who have changed
3334 their uid, for which killpg would return an EPERM error. */
3337 process_send_signal (process
, signo
, current_group
, nomsg
)
3338 Lisp_Object process
;
3340 Lisp_Object current_group
;
3344 register struct Lisp_Process
*p
;
3348 proc
= get_process (process
);
3349 p
= XPROCESS (proc
);
3351 if (!EQ (p
->childp
, Qt
))
3352 error ("Process %s is not a subprocess",
3353 XSTRING (p
->name
)->data
);
3354 if (XINT (p
->infd
) < 0)
3355 error ("Process %s is not active",
3356 XSTRING (p
->name
)->data
);
3358 if (NILP (p
->pty_flag
))
3359 current_group
= Qnil
;
3361 /* If we are using pgrps, get a pgrp number and make it negative. */
3362 if (!NILP (current_group
))
3364 #ifdef SIGNALS_VIA_CHARACTERS
3365 /* If possible, send signals to the entire pgrp
3366 by sending an input character to it. */
3368 /* TERMIOS is the latest and bestest, and seems most likely to
3369 work. If the system has it, use it. */
3376 tcgetattr (XINT (p
->infd
), &t
);
3377 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3381 tcgetattr (XINT (p
->infd
), &t
);
3382 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3386 tcgetattr (XINT (p
->infd
), &t
);
3387 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3388 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3390 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3395 #else /* ! HAVE_TERMIOS */
3397 /* On Berkeley descendants, the following IOCTL's retrieve the
3398 current control characters. */
3399 #if defined (TIOCGLTC) && defined (TIOCGETC)
3407 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3408 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3411 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3412 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3416 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3417 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3419 #endif /* ! defined (SIGTSTP) */
3422 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3424 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3431 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3432 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3435 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3436 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3440 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3441 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3443 #endif /* ! defined (SIGTSTP) */
3445 #else /* ! defined (TCGETA) */
3446 Your configuration files are messed up
.
3447 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3448 you'd better be using one of the alternatives above! */
3449 #endif /* ! defined (TCGETA) */
3450 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3451 #endif /* ! defined HAVE_TERMIOS */
3452 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3455 /* Get the pgrp using the tty itself, if we have that.
3456 Otherwise, use the pty to get the pgrp.
3457 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3458 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3459 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3460 His patch indicates that if TIOCGPGRP returns an error, then
3461 we should just assume that p->pid is also the process group id. */
3465 if (!NILP (p
->subtty
))
3466 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3468 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3472 gid
= - XFASTINT (p
->pid
);
3473 #endif /* ! defined (pfa) */
3479 #else /* ! defined (TIOCGPGRP ) */
3480 /* Can't select pgrps on this system, so we know that
3481 the child itself heads the pgrp. */
3482 gid
= - XFASTINT (p
->pid
);
3483 #endif /* ! defined (TIOCGPGRP ) */
3486 gid
= - XFASTINT (p
->pid
);
3492 p
->raw_status_low
= Qnil
;
3493 p
->raw_status_high
= Qnil
;
3495 XSETINT (p
->tick
, ++process_tick
);
3499 #endif /* ! defined (SIGCONT) */
3502 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3507 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3512 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3515 flush_pending_output (XINT (p
->infd
));
3519 /* If we don't have process groups, send the signal to the immediate
3520 subprocess. That isn't really right, but it's better than any
3521 obvious alternative. */
3524 kill (XFASTINT (p
->pid
), signo
);
3528 /* gid may be a pid, or minus a pgrp's number */
3530 if (!NILP (current_group
))
3531 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3534 gid
= - XFASTINT (p
->pid
);
3537 #else /* ! defined (TIOCSIGSEND) */
3538 EMACS_KILLPG (-gid
, signo
);
3539 #endif /* ! defined (TIOCSIGSEND) */
3542 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3543 "Interrupt process PROCESS. May be process or name of one.\n\
3544 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3545 nil or no arg means current buffer's process.\n\
3546 Second arg CURRENT-GROUP non-nil means send signal to\n\
3547 the current process-group of the process's controlling terminal\n\
3548 rather than to the process's own process group.\n\
3549 If the process is a shell, this means interrupt current subjob\n\
3550 rather than the shell.")
3551 (process
, current_group
)
3552 Lisp_Object process
, current_group
;
3554 process_send_signal (process
, SIGINT
, current_group
, 0);
3558 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3559 "Kill process PROCESS. May be process or name of one.\n\
3560 See function `interrupt-process' for more details on usage.")
3561 (process
, current_group
)
3562 Lisp_Object process
, current_group
;
3564 process_send_signal (process
, SIGKILL
, current_group
, 0);
3568 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3569 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3570 See function `interrupt-process' for more details on usage.")
3571 (process
, current_group
)
3572 Lisp_Object process
, current_group
;
3574 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3578 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3579 "Stop process PROCESS. May be process or name of one.\n\
3580 See function `interrupt-process' for more details on usage.")
3581 (process
, current_group
)
3582 Lisp_Object process
, current_group
;
3585 error ("no SIGTSTP support");
3587 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3592 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3593 "Continue process PROCESS. May be process or name of one.\n\
3594 See function `interrupt-process' for more details on usage.")
3595 (process
, current_group
)
3596 Lisp_Object process
, current_group
;
3599 process_send_signal (process
, SIGCONT
, current_group
, 0);
3601 error ("no SIGCONT support");
3606 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3607 2, 2, "nProcess number: \nnSignal code: ",
3608 "Send the process with process id PID the signal with code SIGCODE.\n\
3609 PID must be an integer. The process need not be a child of this Emacs.\n\
3610 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3612 Lisp_Object pid
, sigcode
;
3614 CHECK_NUMBER (pid
, 0);
3616 #define handle_signal(NAME, VALUE) \
3617 else if (!strcmp (name, NAME)) \
3618 XSETINT (sigcode, VALUE)
3620 if (INTEGERP (sigcode
))
3624 unsigned char *name
;
3626 CHECK_SYMBOL (sigcode
, 1);
3627 name
= XSYMBOL (sigcode
)->name
->data
;
3632 handle_signal ("SIGHUP", SIGHUP
);
3635 handle_signal ("SIGINT", SIGINT
);
3638 handle_signal ("SIGQUIT", SIGQUIT
);
3641 handle_signal ("SIGILL", SIGILL
);
3644 handle_signal ("SIGABRT", SIGABRT
);
3647 handle_signal ("SIGEMT", SIGEMT
);
3650 handle_signal ("SIGKILL", SIGKILL
);
3653 handle_signal ("SIGFPE", SIGFPE
);
3656 handle_signal ("SIGBUS", SIGBUS
);
3659 handle_signal ("SIGSEGV", SIGSEGV
);
3662 handle_signal ("SIGSYS", SIGSYS
);
3665 handle_signal ("SIGPIPE", SIGPIPE
);
3668 handle_signal ("SIGALRM", SIGALRM
);
3671 handle_signal ("SIGTERM", SIGTERM
);
3674 handle_signal ("SIGURG", SIGURG
);
3677 handle_signal ("SIGSTOP", SIGSTOP
);
3680 handle_signal ("SIGTSTP", SIGTSTP
);
3683 handle_signal ("SIGCONT", SIGCONT
);
3686 handle_signal ("SIGCHLD", SIGCHLD
);
3689 handle_signal ("SIGTTIN", SIGTTIN
);
3692 handle_signal ("SIGTTOU", SIGTTOU
);
3695 handle_signal ("SIGIO", SIGIO
);
3698 handle_signal ("SIGXCPU", SIGXCPU
);
3701 handle_signal ("SIGXFSZ", SIGXFSZ
);
3704 handle_signal ("SIGVTALRM", SIGVTALRM
);
3707 handle_signal ("SIGPROF", SIGPROF
);
3710 handle_signal ("SIGWINCH", SIGWINCH
);
3713 handle_signal ("SIGINFO", SIGINFO
);
3716 handle_signal ("SIGUSR1", SIGUSR1
);
3719 handle_signal ("SIGUSR2", SIGUSR2
);
3722 error ("Undefined signal name %s", name
);
3725 #undef handle_signal
3727 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3730 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3731 "Make PROCESS see end-of-file in its input.\n\
3732 Eof comes after any text already sent to it.\n\
3733 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3734 nil, indicating the current buffer's process.\n\
3735 If PROCESS is a network connection, or is a process communicating\n\
3736 through a pipe (as opposed to a pty), then you cannot send any more\n\
3737 text to PROCESS after you call this function.")
3739 Lisp_Object process
;
3743 proc
= get_process (process
);
3745 /* Make sure the process is really alive. */
3746 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3747 update_status (XPROCESS (proc
));
3748 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3749 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3752 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3754 if (!NILP (XPROCESS (proc
)->pty_flag
))
3755 send_process (proc
, "\004", 1, Qnil
);
3758 #ifdef HAVE_SHUTDOWN
3759 /* If this is a network connection, or socketpair is used
3760 for communication with the subprocess, call shutdown to cause EOF.
3761 (In some old system, shutdown to socketpair doesn't work.
3762 Then we just can't win.) */
3763 if (NILP (XPROCESS (proc
)->pid
)
3764 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
3765 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
3766 /* In case of socketpair, outfd == infd, so don't close it. */
3767 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
3768 close (XINT (XPROCESS (proc
)->outfd
));
3769 #else /* not HAVE_SHUTDOWN */
3770 close (XINT (XPROCESS (proc
)->outfd
));
3771 #endif /* not HAVE_SHUTDOWN */
3772 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3778 /* Kill all processes associated with `buffer'.
3779 If `buffer' is nil, kill all processes */
3782 kill_buffer_processes (buffer
)
3785 Lisp_Object tail
, proc
;
3787 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3789 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3790 if (GC_PROCESSP (proc
)
3791 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3793 if (NETCONN_P (proc
))
3794 Fdelete_process (proc
);
3795 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3796 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3801 /* On receipt of a signal that a child status has changed,
3802 loop asking about children with changed statuses until
3803 the system says there are no more.
3804 All we do is change the status;
3805 we do not run sentinels or print notifications.
3806 That is saved for the next time keyboard input is done,
3807 in order to avoid timing errors. */
3809 /** WARNING: this can be called during garbage collection.
3810 Therefore, it must not be fooled by the presence of mark bits in
3813 /** USG WARNING: Although it is not obvious from the documentation
3814 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3815 signal() before executing at least one wait(), otherwise the handler
3816 will be called again, resulting in an infinite loop. The relevant
3817 portion of the documentation reads "SIGCLD signals will be queued
3818 and the signal-catching function will be continually reentered until
3819 the queue is empty". Invoking signal() causes the kernel to reexamine
3820 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3823 sigchld_handler (signo
)
3826 int old_errno
= errno
;
3828 register struct Lisp_Process
*p
;
3829 extern EMACS_TIME
*input_available_clear_time
;
3833 sigheld
|= sigbit (SIGCHLD
);
3845 #endif /* no WUNTRACED */
3846 /* Keep trying to get a status until we get a definitive result. */
3850 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3852 while (pid
<= 0 && errno
== EINTR
);
3856 /* A real failure. We have done all our job, so return. */
3858 /* USG systems forget handlers when they are used;
3859 must reestablish each time */
3860 #if defined (USG) && !defined (POSIX_SIGNALS)
3861 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3864 sigheld
&= ~sigbit (SIGCHLD
);
3872 #endif /* no WNOHANG */
3874 /* Find the process that signaled us, and record its status. */
3877 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3879 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3880 p
= XPROCESS (proc
);
3881 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3886 /* Look for an asynchronous process whose pid hasn't been filled
3889 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3891 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3892 p
= XPROCESS (proc
);
3893 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3898 /* Change the status of the process that was found. */
3901 union { int i
; WAITTYPE wt
; } u
;
3902 int clear_desc_flag
= 0;
3904 XSETINT (p
->tick
, ++process_tick
);
3906 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3907 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3909 /* If process has terminated, stop waiting for its output. */
3910 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3911 && XINT (p
->infd
) >= 0)
3912 clear_desc_flag
= 1;
3914 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3915 if (clear_desc_flag
)
3917 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3918 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3921 /* Tell wait_reading_process_input that it needs to wake up and
3923 if (input_available_clear_time
)
3924 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3927 /* There was no asynchronous process found for that id. Check
3928 if we have a synchronous process. */
3931 synch_process_alive
= 0;
3933 /* Report the status of the synchronous process. */
3935 synch_process_retcode
= WRETCODE (w
);
3936 else if (WIFSIGNALED (w
))
3938 int code
= WTERMSIG (w
);
3944 /* Suppress warning if the table has const char *. */
3945 signame
= (char *) sys_siglist
[code
];
3947 signame
= sys_errlist
[code
];
3951 signame
= "unknown";
3953 synch_process_death
= signame
;
3956 /* Tell wait_reading_process_input that it needs to wake up and
3958 if (input_available_clear_time
)
3959 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3962 /* On some systems, we must return right away.
3963 If any more processes want to signal us, we will
3965 Otherwise (on systems that have WNOHANG), loop around
3966 to use up all the processes that have something to tell us. */
3967 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3968 #if defined (USG) && ! defined (POSIX_SIGNALS)
3969 signal (signo
, sigchld_handler
);
3973 #endif /* USG, but not HPUX with WNOHANG */
3979 exec_sentinel_unwind (data
)
3982 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3987 exec_sentinel_error_handler (error
)
3990 cmd_error_internal (error
, "error in process sentinel: ");
3992 update_echo_area ();
3993 Fsleep_for (make_number (2), Qnil
);
3997 exec_sentinel (proc
, reason
)
3998 Lisp_Object proc
, reason
;
4000 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
4001 register struct Lisp_Process
*p
= XPROCESS (proc
);
4002 int count
= specpdl_ptr
- specpdl
;
4003 int outer_running_asynch_code
= running_asynch_code
;
4005 /* No need to gcpro these, because all we do with them later
4006 is test them for EQness, and none of them should be a string. */
4007 odeactivate
= Vdeactivate_mark
;
4008 XSETBUFFER (obuffer
, current_buffer
);
4009 okeymap
= current_buffer
->keymap
;
4011 sentinel
= p
->sentinel
;
4012 if (NILP (sentinel
))
4015 /* Zilch the sentinel while it's running, to avoid recursive invocations;
4016 assure that it gets restored no matter how the sentinel exits. */
4018 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
4019 /* Inhibit quit so that random quits don't screw up a running filter. */
4020 specbind (Qinhibit_quit
, Qt
);
4021 specbind (Qlast_nonmenu_event
, Qt
);
4023 /* In case we get recursively called,
4024 and we already saved the match data nonrecursively,
4025 save the same match data in safely recursive fashion. */
4026 if (outer_running_asynch_code
)
4029 tem
= Fmatch_data (Qnil
, Qnil
);
4030 restore_match_data ();
4031 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4032 Fset_match_data (tem
);
4035 /* For speed, if a search happens within this code,
4036 save the match data in a special nonrecursive fashion. */
4037 running_asynch_code
= 1;
4039 internal_condition_case_1 (read_process_output_call
,
4041 Fcons (proc
, Fcons (reason
, Qnil
))),
4042 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4043 exec_sentinel_error_handler
);
4045 /* If we saved the match data nonrecursively, restore it now. */
4046 restore_match_data ();
4047 running_asynch_code
= outer_running_asynch_code
;
4049 Vdeactivate_mark
= odeactivate
;
4051 if (! EQ (Fcurrent_buffer (), obuffer
)
4052 || ! EQ (current_buffer
->keymap
, okeymap
))
4054 /* But do it only if the caller is actually going to read events.
4055 Otherwise there's no need to make him wake up, and it could
4056 cause trouble (for example it would make Fsit_for return). */
4057 if (waiting_for_user_input_p
== -1)
4058 record_asynch_buffer_change ();
4060 unbind_to (count
, Qnil
);
4063 /* Report all recent events of a change in process status
4064 (either run the sentinel or output a message).
4065 This is done while Emacs is waiting for keyboard input. */
4070 register Lisp_Object proc
, buffer
;
4071 Lisp_Object tail
, msg
;
4072 struct gcpro gcpro1
, gcpro2
;
4076 /* We need to gcpro tail; if read_process_output calls a filter
4077 which deletes a process and removes the cons to which tail points
4078 from Vprocess_alist, and then causes a GC, tail is an unprotected
4082 /* Set this now, so that if new processes are created by sentinels
4083 that we run, we get called again to handle their status changes. */
4084 update_tick
= process_tick
;
4086 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
4089 register struct Lisp_Process
*p
;
4091 proc
= Fcdr (Fcar (tail
));
4092 p
= XPROCESS (proc
);
4094 if (XINT (p
->tick
) != XINT (p
->update_tick
))
4096 XSETINT (p
->update_tick
, XINT (p
->tick
));
4098 /* If process is still active, read any output that remains. */
4099 while (! EQ (p
->filter
, Qt
)
4100 && XINT (p
->infd
) >= 0
4101 && read_process_output (proc
, XINT (p
->infd
)) > 0);
4105 /* Get the text to use for the message. */
4106 if (!NILP (p
->raw_status_low
))
4108 msg
= status_message (p
->status
);
4110 /* If process is terminated, deactivate it or delete it. */
4112 if (CONSP (p
->status
))
4113 symbol
= XCONS (p
->status
)->car
;
4115 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
4116 || EQ (symbol
, Qclosed
))
4118 if (delete_exited_processes
)
4119 remove_process (proc
);
4121 deactivate_process (proc
);
4124 /* The actions above may have further incremented p->tick.
4125 So set p->update_tick again
4126 so that an error in the sentinel will not cause
4127 this code to be run again. */
4128 XSETINT (p
->update_tick
, XINT (p
->tick
));
4129 /* Now output the message suitably. */
4130 if (!NILP (p
->sentinel
))
4131 exec_sentinel (proc
, msg
);
4132 /* Don't bother with a message in the buffer
4133 when a process becomes runnable. */
4134 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
4136 Lisp_Object ro
, tem
;
4137 struct buffer
*old
= current_buffer
;
4138 int opoint
, opoint_byte
;
4139 int before
, before_byte
;
4141 ro
= XBUFFER (buffer
)->read_only
;
4143 /* Avoid error if buffer is deleted
4144 (probably that's why the process is dead, too) */
4145 if (NILP (XBUFFER (buffer
)->name
))
4147 Fset_buffer (buffer
);
4150 opoint_byte
= PT_BYTE
;
4151 /* Insert new output into buffer
4152 at the current end-of-output marker,
4153 thus preserving logical ordering of input and output. */
4154 if (XMARKER (p
->mark
)->buffer
)
4155 Fgoto_char (p
->mark
);
4157 SET_PT_BOTH (ZV
, ZV_BYTE
);
4160 before_byte
= PT_BYTE
;
4162 tem
= current_buffer
->read_only
;
4163 current_buffer
->read_only
= Qnil
;
4164 insert_string ("\nProcess ");
4165 Finsert (1, &p
->name
);
4166 insert_string (" ");
4168 current_buffer
->read_only
= tem
;
4169 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4171 if (opoint
>= before
)
4172 SET_PT_BOTH (opoint
+ (PT
- before
),
4173 opoint_byte
+ (PT_BYTE
- before_byte
));
4175 SET_PT_BOTH (opoint
, opoint_byte
);
4177 set_buffer_internal (old
);
4182 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4183 redisplay_preserve_echo_area ();
4189 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4190 Sset_process_coding_system
, 1, 3, 0,
4191 "Set coding systems of PROCESS to DECODING (input from the process) and\n\
4192 ENCODING (output to the process).")
4193 (proc
, decoding
, encoding
)
4194 register Lisp_Object proc
, decoding
, encoding
;
4196 register struct Lisp_Process
*p
;
4198 CHECK_PROCESS (proc
, 0);
4199 p
= XPROCESS (proc
);
4200 if (XINT (p
->infd
) < 0)
4201 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4202 if (XINT (p
->outfd
) < 0)
4203 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4205 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4206 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4207 setup_coding_system (decoding
,
4208 proc_decode_coding_system
[XINT (p
->infd
)]);
4209 setup_coding_system (encoding
,
4210 proc_encode_coding_system
[XINT (p
->outfd
)]);
4215 DEFUN ("process-coding-system",
4216 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4217 "Return a cons of coding systems for decoding and encoding of PROCESS.")
4219 register Lisp_Object proc
;
4221 CHECK_PROCESS (proc
, 0);
4222 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4223 XPROCESS (proc
)->encode_coding_system
);
4226 /* The first time this is called, assume keyboard input comes from DESC
4227 instead of from where we used to expect it.
4228 Subsequent calls mean assume input keyboard can come from DESC
4229 in addition to other places. */
4231 static int add_keyboard_wait_descriptor_called_flag
;
4234 add_keyboard_wait_descriptor (desc
)
4237 if (! add_keyboard_wait_descriptor_called_flag
)
4238 FD_CLR (0, &input_wait_mask
);
4239 add_keyboard_wait_descriptor_called_flag
= 1;
4240 FD_SET (desc
, &input_wait_mask
);
4241 FD_SET (desc
, &non_process_wait_mask
);
4242 if (desc
> max_keyboard_desc
)
4243 max_keyboard_desc
= desc
;
4246 /* From now on, do not expect DESC to give keyboard input. */
4249 delete_keyboard_wait_descriptor (desc
)
4253 int lim
= max_keyboard_desc
;
4255 FD_CLR (desc
, &input_wait_mask
);
4256 FD_CLR (desc
, &non_process_wait_mask
);
4258 if (desc
== max_keyboard_desc
)
4259 for (fd
= 0; fd
< lim
; fd
++)
4260 if (FD_ISSET (fd
, &input_wait_mask
)
4261 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4262 max_keyboard_desc
= fd
;
4265 /* Return nonzero if *MASK has a bit set
4266 that corresponds to one of the keyboard input descriptors. */
4269 keyboard_bit_set (mask
)
4274 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4275 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4276 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4288 if (! noninteractive
|| initialized
)
4290 signal (SIGCHLD
, sigchld_handler
);
4293 FD_ZERO (&input_wait_mask
);
4294 FD_ZERO (&non_keyboard_wait_mask
);
4295 FD_ZERO (&non_process_wait_mask
);
4296 max_process_desc
= 0;
4298 FD_SET (0, &input_wait_mask
);
4300 Vprocess_alist
= Qnil
;
4301 for (i
= 0; i
< MAXDESC
; i
++)
4303 chan_process
[i
] = Qnil
;
4304 proc_buffered_char
[i
] = -1;
4306 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4307 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4312 Qprocessp
= intern ("processp");
4313 staticpro (&Qprocessp
);
4314 Qrun
= intern ("run");
4316 Qstop
= intern ("stop");
4318 Qsignal
= intern ("signal");
4319 staticpro (&Qsignal
);
4321 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4324 Qexit = intern ("exit");
4325 staticpro (&Qexit); */
4327 Qopen
= intern ("open");
4329 Qclosed
= intern ("closed");
4330 staticpro (&Qclosed
);
4332 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4333 staticpro (&Qlast_nonmenu_event
);
4335 staticpro (&Vprocess_alist
);
4337 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4338 "*Non-nil means delete processes immediately when they exit.\n\
4339 nil means don't delete them until `list-processes' is run.");
4341 delete_exited_processes
= 1;
4343 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4344 "Control type of device used to communicate with subprocesses.\n\
4345 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4346 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4347 then a pipe is used in any case.\n\
4348 The value takes effect when `start-process' is called.");
4349 Vprocess_connection_type
= Qt
;
4351 defsubr (&Sprocessp
);
4352 defsubr (&Sget_process
);
4353 defsubr (&Sget_buffer_process
);
4354 defsubr (&Sdelete_process
);
4355 defsubr (&Sprocess_status
);
4356 defsubr (&Sprocess_exit_status
);
4357 defsubr (&Sprocess_id
);
4358 defsubr (&Sprocess_name
);
4359 defsubr (&Sprocess_tty_name
);
4360 defsubr (&Sprocess_command
);
4361 defsubr (&Sset_process_buffer
);
4362 defsubr (&Sprocess_buffer
);
4363 defsubr (&Sprocess_mark
);
4364 defsubr (&Sset_process_filter
);
4365 defsubr (&Sprocess_filter
);
4366 defsubr (&Sset_process_sentinel
);
4367 defsubr (&Sprocess_sentinel
);
4368 defsubr (&Sset_process_window_size
);
4369 defsubr (&Sprocess_kill_without_query
);
4370 defsubr (&Sprocess_contact
);
4371 defsubr (&Slist_processes
);
4372 defsubr (&Sprocess_list
);
4373 defsubr (&Sstart_process
);
4375 defsubr (&Sopen_network_stream
);
4376 #endif /* HAVE_SOCKETS */
4377 defsubr (&Saccept_process_output
);
4378 defsubr (&Sprocess_send_region
);
4379 defsubr (&Sprocess_send_string
);
4380 defsubr (&Sinterrupt_process
);
4381 defsubr (&Skill_process
);
4382 defsubr (&Squit_process
);
4383 defsubr (&Sstop_process
);
4384 defsubr (&Scontinue_process
);
4385 defsubr (&Sprocess_send_eof
);
4386 defsubr (&Ssignal_process
);
4387 defsubr (&Swaiting_for_user_input_p
);
4388 /* defsubr (&Sprocess_connection); */
4389 defsubr (&Sset_process_coding_system
);
4390 defsubr (&Sprocess_coding_system
);
4394 #else /* not subprocesses */
4396 #include <sys/types.h>
4400 #include "systime.h"
4401 #include "termopts.h"
4402 #include "sysselect.h"
4404 extern int frame_garbaged
;
4406 extern EMACS_TIME
timer_check ();
4407 extern int timers_run
;
4409 /* As described above, except assuming that there are no subprocesses:
4411 Wait for timeout to elapse and/or keyboard input to be available.
4414 timeout in seconds, or
4415 zero for no limit, or
4416 -1 means gobble data immediately available but don't wait for any.
4418 read_kbd is a Lisp_Object:
4419 0 to ignore keyboard input, or
4420 1 to return when input is available, or
4421 -1 means caller will actually read the input, so don't throw to
4423 a cons cell, meaning wait until its car is non-nil
4424 (and gobble terminal input into the buffer if any arrives), or
4425 We know that read_kbd will never be a Lisp_Process, since
4426 `subprocesses' isn't defined.
4428 do_display != 0 means redisplay should be done to show subprocess
4429 output that arrives.
4431 Return true iff we received input from any process. */
4434 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4435 int time_limit
, microsecs
;
4436 Lisp_Object read_kbd
;
4439 EMACS_TIME end_time
, timeout
;
4440 SELECT_TYPE waitchannels
;
4442 Lisp_Object
*wait_for_cell
= 0;
4444 /* If waiting for non-nil in a cell, record where. */
4445 if (CONSP (read_kbd
))
4447 wait_for_cell
= &XCONS (read_kbd
)->car
;
4448 XSETFASTINT (read_kbd
, 0);
4451 /* What does time_limit really mean? */
4452 if (time_limit
|| microsecs
)
4454 if (time_limit
== -1)
4455 /* In fact, it's zero. */
4456 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4458 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4460 /* How far in the future is that? */
4461 EMACS_GET_TIME (end_time
);
4462 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4465 /* It's infinite. */
4466 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4468 /* Turn off periodic alarms (in case they are in use)
4469 because the select emulator uses alarms. */
4475 int timeout_reduced_for_timers
= 0;
4477 /* If calling from keyboard input, do not quit
4478 since we want to return C-g as an input character.
4479 Otherwise, do pending quit if requested. */
4480 if (XINT (read_kbd
) >= 0)
4483 /* Exit now if the cell we're waiting for became non-nil. */
4484 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4487 /* Compute time from now till when time limit is up */
4488 /* Exit if already run out */
4489 if (time_limit
> 0 || microsecs
)
4491 EMACS_GET_TIME (timeout
);
4492 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4493 if (EMACS_TIME_NEG_P (timeout
))
4497 /* If our caller will not immediately handle keyboard events,
4498 run timer events directly.
4499 (Callers that will immediately read keyboard events
4500 call timer_delay on their own.) */
4501 if (! wait_for_cell
)
4503 EMACS_TIME timer_delay
;
4507 old_timers_run
= timers_run
;
4508 timer_delay
= timer_check (1);
4509 if (timers_run
!= old_timers_run
&& do_display
)
4511 redisplay_preserve_echo_area ();
4512 /* We must retry, since a timer may have requeued itself
4513 and that could alter the time delay. */
4517 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4519 EMACS_TIME difference
;
4520 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4521 if (EMACS_TIME_NEG_P (difference
))
4523 timeout
= timer_delay
;
4524 timeout_reduced_for_timers
= 1;
4529 /* Cause C-g and alarm signals to take immediate action,
4530 and cause input available signals to zero out timeout. */
4531 if (XINT (read_kbd
) < 0)
4532 set_waiting_for_input (&timeout
);
4534 /* Wait till there is something to do. */
4536 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4537 FD_ZERO (&waitchannels
);
4539 FD_SET (0, &waitchannels
);
4541 /* If a frame has been newly mapped and needs updating,
4542 reprocess its display stuff. */
4543 if (frame_garbaged
&& do_display
)
4545 clear_waiting_for_input ();
4546 redisplay_preserve_echo_area ();
4547 if (XINT (read_kbd
) < 0)
4548 set_waiting_for_input (&timeout
);
4551 if (XINT (read_kbd
) && detect_input_pending ())
4554 FD_ZERO (&waitchannels
);
4557 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4562 /* Make C-g and alarm signals set flags again */
4563 clear_waiting_for_input ();
4565 /* If we woke up due to SIGWINCH, actually change size now. */
4566 do_pending_window_change ();
4568 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4569 /* We waited the full specified time, so return now. */
4574 /* If the system call was interrupted, then go around the
4576 if (xerrno
== EINTR
)
4577 FD_ZERO (&waitchannels
);
4579 error ("select error: %s", strerror (xerrno
));
4582 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4583 /* System sometimes fails to deliver SIGIO. */
4584 kill (getpid (), SIGIO
);
4587 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4588 kill (getpid (), SIGIO
);
4591 /* Check for keyboard input */
4593 if ((XINT (read_kbd
) != 0)
4594 && detect_input_pending_run_timers (do_display
))
4596 swallow_events (do_display
);
4597 if (detect_input_pending_run_timers (do_display
))
4601 /* If wait_for_cell. check for keyboard input
4602 but don't run any timers.
4603 ??? (It seems wrong to me to check for keyboard
4604 input at all when wait_for_cell, but the code
4605 has been this way since July 1994.
4606 Try changing this after version 19.31.) */
4608 && detect_input_pending ())
4610 swallow_events (do_display
);
4611 if (detect_input_pending ())
4615 /* Exit now if the cell we're waiting for became non-nil. */
4616 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4626 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4627 /* Don't confuse make-docfile by having two doc strings for this function.
4628 make-docfile does not pay attention to #if, for good reason! */
4631 register Lisp_Object name
;
4636 /* Kill all processes associated with `buffer'.
4637 If `buffer' is nil, kill all processes.
4638 Since we have no subprocesses, this does nothing. */
4640 kill_buffer_processes (buffer
)
4651 defsubr (&Sget_buffer_process
);
4655 #endif /* not subprocesses */