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emacs
emacs
Commits
f927c5ae
Commit
f927c5ae
authored
May 23, 1991
by
Jim Blandy
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src/emacs.c
src/emacs.c
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src/minibuf.c
src/minibuf.c
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f927c5ae
/* Fully extensible Emacs, running on Unix, intended for GNU.
Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <signal.h>
#include <errno.h>
#include "config.h"
#include <stdio.h>
#include <sys/types.h>
#include <sys/file.h>
#ifdef VMS
#include <ssdef.h>
#endif
#ifdef USG5
#include <fcntl.h>
#endif
#ifdef BSD
#include <sys/ioctl.h>
#endif
#ifdef APOLLO
#ifndef APOLLO_SR10
#include <default_acl.h>
#endif
#endif
#undef NULL
#include "lisp.h"
#include "commands.h"
#ifndef O_RDWR
#define O_RDWR 2
#endif
#define PRIO_PROCESS 0
/* Command line args from shell, as list of strings */
Lisp_Object
Vcommand_line_args
;
/* Set nonzero after Emacs has started up the first time.
Prevents reinitialization of the Lisp world and keymaps
on subsequent starts. */
int
initialized
;
/* Variable whose value is symbol giving operating system type */
Lisp_Object
Vsystem_type
;
/* If non-zero, emacs should not attempt to use an window-specific code,
but instead should use the virtual terminal under which it was started */
int
inhibit_window_system
;
#ifdef HAVE_X_WINDOWS
/* If non-zero, -d was specified, meaning we're using some window system. */
int
display_arg
;
#endif
/* An address near the bottom of the stack.
Tells GC how to save a copy of the stack. */
char
*
stack_bottom
;
#ifdef HAVE_X_WINDOWS
extern
Lisp_Object
Vwindow_system
;
#endif
/* HAVE_X_WINDOWS */
#ifdef USG_SHARED_LIBRARIES
/* If nonzero, this is the place to put the end of the writable segment
at startup. */
unsigned
int
bss_end
=
0
;
#endif
/* Nonzero means running Emacs without interactive terminal. */
int
noninteractive
;
/* Value of Lisp variable `noninteractive'.
Normally same as C variable `noninteractive'
but nothing terrible happens if user sets this one. */
int
noninteractive1
;
/* Signal code for the fatal signal that was received */
int
fatal_error_code
;
/* Nonzero if handling a fatal error already */
int
fatal_error_in_progress
;
/* Handle bus errors, illegal instruction, etc. */
fatal_error_signal
(
sig
)
int
sig
;
{
#ifdef BSD
int
tpgrp
;
#endif
/* BSD */
fatal_error_code
=
sig
;
signal
(
sig
,
SIG_DFL
);
/* If fatal error occurs in code below, avoid infinite recursion. */
if
(
fatal_error_in_progress
)
kill
(
getpid
(),
fatal_error_code
);
fatal_error_in_progress
=
1
;
/* If we are controlling the terminal, reset terminal modes */
#ifdef BSD
if
(
ioctl
(
0
,
TIOCGPGRP
,
&
tpgrp
)
==
0
&&
tpgrp
==
getpgrp
(
0
))
#endif
/* BSD */
{
reset_sys_modes
();
if
(
sig
!=
SIGTERM
)
fprintf
(
stderr
,
"Fatal error (%d)."
,
sig
);
}
/* Clean up */
#ifdef subprocesses
kill_buffer_processes
(
Qnil
);
#endif
Fdo_auto_save
(
Qt
,
Qnil
);
#ifdef CLASH_DETECTION
unlock_all_files
();
#endif
/* CLASH_DETECTION */
#ifdef VMS
kill_vms_processes
();
LIB
$
STOP
(
SS
$
_ABORT
);
#else
/* Signal the same code; this time it will really be fatal. */
kill
(
getpid
(),
fatal_error_code
);
#endif
/* not VMS */
}
/* Code for dealing with Lisp access to the Unix command line */
static
init_cmdargs
(
argc
,
argv
,
skip_args
)
int
argc
;
char
**
argv
;
int
skip_args
;
{
register
int
i
;
Vcommand_line_args
=
Qnil
;
for
(
i
=
argc
-
1
;
i
>=
0
;
i
--
)
{
if
(
i
==
0
||
i
>
skip_args
)
Vcommand_line_args
=
Fcons
(
build_string
(
argv
[
i
]),
Vcommand_line_args
);
}
}
#ifdef VMS
#ifdef LINK_CRTL_SHARE
#ifdef SHAREABLE_LIB_BUG
extern
noshare
char
**
environ
;
#endif
/* SHAREABLE_LIB_BUG */
#endif
/* LINK_CRTL_SHARE */
#endif
/* VMS */
/* ARGSUSED */
main
(
argc
,
argv
,
envp
)
int
argc
;
char
**
argv
;
char
**
envp
;
{
char
stack_bottom_variable
;
int
skip_args
=
0
;
extern
int
errno
;
extern
sys_nerr
;
extern
char
*
sys_errlist
[];
extern
void
malloc_warning
();
/* Map in shared memory, if we are using that. */
#ifdef HAVE_SHM
if
(
argc
>
1
&&
!
strcmp
(
argv
[
1
],
"-nl"
))
{
map_in_data
(
0
);
/* The shared memory was just restored, which clobbered this. */
skip_args
=
1
;
}
else
{
map_in_data
(
1
);
/* The shared memory was just restored, which clobbered this. */
skip_args
=
0
;
}
#endif
#ifdef HAVE_X_WINDOWS
/* Stupid kludge to catch command-line display spec. ask jla */
{
int
i
;
for
(
i
=
1
;
(
i
<
argc
&&
!
display_arg
);
i
++
)
if
(
!
strcmp
(
argv
[
i
],
"-d"
))
display_arg
=
1
;
}
#endif
#ifdef VMS
/* If -map specified, map the data file in */
if
(
argc
>
2
&&
!
strcmp
(
argv
[
1
],
"-map"
))
{
skip_args
=
2
;
mapin_data
(
argv
[
2
]);
}
#ifdef LINK_CRTL_SHARE
#ifdef SHAREABLE_LIB_BUG
/* Bletcherous shared libraries! */
if
(
!
stdin
)
stdin
=
fdopen
(
0
,
"r"
);
if
(
!
stdout
)
stdout
=
fdopen
(
1
,
"w"
);
if
(
!
stderr
)
stderr
=
fdopen
(
2
,
"w"
);
if
(
!
environ
)
environ
=
envp
;
#endif
/* SHAREABLE_LIB_BUG */
#endif
/* LINK_CRTL_SHARE */
#endif
/* VMS */
/* Record (approximately) where the stack begins. */
stack_bottom
=
&
stack_bottom_variable
;
#ifdef RUN_TIME_REMAP
if
(
initialized
)
run_time_remap
(
argv
[
0
]);
#endif
#ifdef USG_SHARED_LIBRARIES
if
(
bss_end
)
brk
(
bss_end
);
#endif
clearerr
(
stdin
);
#ifdef BSD
setpgrp
(
0
,
getpid
());
#endif
#ifdef APOLLO
#ifndef APOLLO_SR10
/* If USE_DOMAIN_ACLS environment variable exists,
use ACLs rather than UNIX modes. */
if
(
egetenv
(
"USE_DOMAIN_ACLS"
))
default_acl
(
USE_DEFACL
);
#endif
#endif
/* APOLLO */
#ifndef SYSTEM_MALLOC
if
(
!
initialized
)
malloc_init
(
0
,
malloc_warning
);
#endif
/* not SYSTEM_MALLOC */
#ifdef HIGHPRI
setpriority
(
PRIO_PROCESS
,
getpid
(),
HIGHPRI
);
setuid
(
getuid
());
#endif
/* HIGHPRI */
#ifdef BSD
/* interrupt_input has trouble if we aren't in a separate process group. */
setpgrp
(
getpid
(),
getpid
());
#endif
inhibit_window_system
=
0
;
/* Handle the -t switch, which specifies filename to use as terminal */
if
(
skip_args
+
2
<
argc
&&
!
strcmp
(
argv
[
skip_args
+
1
],
"-t"
))
{
int
result
;
skip_args
+=
2
;
close
(
0
);
close
(
1
);
result
=
open
(
argv
[
skip_args
],
O_RDWR
,
2
);
if
(
result
<
0
)
{
char
*
errstring
;
if
(
errno
>=
0
&&
errno
<
sys_nerr
)
errstring
=
sys_errlist
[
errno
];
else
errstring
=
"undocumented error code"
;
fprintf
(
stderr
,
"emacs: %s: %s
\n
"
,
argv
[
skip_args
],
errstring
);
exit
(
1
);
}
dup
(
0
);
if
(
!
isatty
(
0
))
{
fprintf
(
stderr
,
"emacs: %s: not a tty
\n
"
,
argv
[
skip_args
]);
exit
(
1
);
}
fprintf
(
stderr
,
"Using %s
\n
"
,
argv
[
skip_args
]);
#ifdef HAVE_X_WINDOWS
inhibit_window_system
=
1
;
/* -t => -nw */
#endif
}
if
(
skip_args
+
1
<
argc
&&
(
!
strcmp
(
argv
[
skip_args
+
1
],
"-nw"
)))
{
skip_args
+=
1
;
inhibit_window_system
=
1
;
}
/* Handle the -batch switch, which means don't do interactive display. */
noninteractive
=
0
;
if
(
skip_args
+
1
<
argc
&&
!
strcmp
(
argv
[
skip_args
+
1
],
"-batch"
))
{
skip_args
+=
1
;
noninteractive
=
1
;
}
if
(
#ifndef CANNOT_DUMP
!
noninteractive
||
initialized
#else
1
#endif
)
{
/* Don't catch these signals in batch mode if not initialized.
On some machines, this sets static data that would make
signal fail to work right when the dumped Emacs is run. */
signal
(
SIGHUP
,
fatal_error_signal
);
signal
(
SIGQUIT
,
fatal_error_signal
);
signal
(
SIGILL
,
fatal_error_signal
);
signal
(
SIGTRAP
,
fatal_error_signal
);
signal
(
SIGIOT
,
fatal_error_signal
);
#ifdef SIGEMT
signal
(
SIGEMT
,
fatal_error_signal
);
#endif
signal
(
SIGFPE
,
fatal_error_signal
);
signal
(
SIGBUS
,
fatal_error_signal
);
signal
(
SIGSEGV
,
fatal_error_signal
);
signal
(
SIGSYS
,
fatal_error_signal
);
signal
(
SIGTERM
,
fatal_error_signal
);
#ifdef SIGXCPU
signal
(
SIGXCPU
,
fatal_error_signal
);
#endif
#ifdef SIGXFSZ
signal
(
SIGXFSZ
,
fatal_error_signal
);
#endif
/* SIGXFSZ */
#ifdef AIX
signal
(
SIGDANGER
,
fatal_error_signal
);
signal
(
20
,
fatal_error_signal
);
signal
(
21
,
fatal_error_signal
);
signal
(
22
,
fatal_error_signal
);
signal
(
23
,
fatal_error_signal
);
signal
(
24
,
fatal_error_signal
);
signal
(
SIGAIO
,
fatal_error_signal
);
signal
(
SIGPTY
,
fatal_error_signal
);
signal
(
SIGIOINT
,
fatal_error_signal
);
signal
(
SIGGRANT
,
fatal_error_signal
);
signal
(
SIGRETRACT
,
fatal_error_signal
);
signal
(
SIGSOUND
,
fatal_error_signal
);
signal
(
SIGMSG
,
fatal_error_signal
);
#endif
/* AIX */
}
noninteractive1
=
noninteractive
;
/* Perform basic initializations (not merely interning symbols) */
if
(
!
initialized
)
{
init_alloc_once
();
init_obarray
();
init_eval_once
();
init_syntax_once
();
/* Create standard syntax table. */
/* Must be done before init_buffer */
init_casetab_once
();
init_buffer_once
();
/* Create buffer table and some buffers */
init_minibuf_once
();
/* Create list of minibuffers */
/* Must precede init_window_once */
init_window_once
();
/* Init the window system */
}
init_alloc
();
#ifdef MAINTAIN_ENVIRONMENT
init_environ
();
#endif
init_eval
();
init_data
();
init_read
();
init_cmdargs
(
argc
,
argv
,
skip_args
);
/* Create list Vcommand_line_args */
init_buffer
();
/* Init default directory of main buffer */
if
(
!
noninteractive
)
{
#ifdef VMS
init_vms_input
();
/* init_display calls get_screen_size, that needs this */
#endif
/* VMS */
init_display
();
/* Determine terminal type. init_sys_modes uses results */
}
init_keyboard
();
/* This too must precede init_sys_modes */
init_callproc
();
/* And this too. */
#ifdef VMS
init_vmsproc
();
/* And this too. */
#endif
/* VMS */
init_sys_modes
();
/* Init system terminal modes (RAW or CBREAK, etc.) */
init_xdisp
();
init_macros
();
init_editfns
();
#ifdef LISP_FLOAT_TYPE
init_floatfns
();
#endif
#ifdef VMS
init_vmsfns
();
#endif
/* VMS */
#ifdef subprocesses
init_process
();
#endif
/* subprocesses */
/* Intern the names of all standard functions and variables; define standard keys */
if
(
!
initialized
)
{
/* The basic levels of Lisp must come first */
/* And data must come first of all
for the sake of symbols like error-message */
syms_of_data
();
syms_of_alloc
();
#ifdef MAINTAIN_ENVIRONMENT
syms_of_environ
();
#endif
/* MAINTAIN_ENVIRONMENT */
syms_of_read
();
syms_of_print
();
syms_of_eval
();
syms_of_fns
();
#ifdef LISP_FLOAT_TYPE
syms_of_floatfns
();
#endif
syms_of_abbrev
();
syms_of_buffer
();
syms_of_bytecode
();
syms_of_callint
();
syms_of_casefiddle
();
syms_of_casetab
();
syms_of_callproc
();
syms_of_cmds
();
#ifndef NO_DIR_LIBRARY
syms_of_dired
();
#endif
/* not NO_DIR_LIBRARY */
syms_of_display
();
syms_of_doc
();
syms_of_editfns
();
syms_of_emacs
();
syms_of_fileio
();
#ifdef CLASH_DETECTION
syms_of_filelock
();
#endif
/* CLASH_DETECTION */
syms_of_indent
();
syms_of_keyboard
();
syms_of_keymap
();
syms_of_macros
();
syms_of_marker
();
syms_of_minibuf
();
syms_of_mocklisp
();
#ifdef subprocesses
syms_of_process
();
#endif
/* subprocesses */
syms_of_search
();
#ifdef MULTI_SCREEN
syms_of_screen
();
#endif
syms_of_syntax
();
syms_of_undo
();
#ifdef VMS
syms_of_vmsproc
();
#endif
/* VMS */
syms_of_window
();
syms_of_xdisp
();
#ifdef HAVE_X_WINDOWS
syms_of_xfns
();
#ifdef HAVE_X_MENU
syms_of_xmenu
();
#endif
/* HAVE_X_MENU */
#endif
/* HAVE_X_WINDOWS */
#ifdef SYMS_SYSTEM
SYMS_SYSTEM
;
#endif
#ifdef SYMS_MACHINE
SYMS_MACHINE
;
#endif
keys_of_casefiddle
();
keys_of_cmds
();
keys_of_buffer
();
keys_of_keyboard
();
keys_of_keymap
();
keys_of_macros
();
keys_of_minibuf
();
keys_of_window
();
}
if
(
!
initialized
)
{
/* Handle -l loadup-and-dump, args passed by Makefile. */
if
(
argc
>
2
+
skip_args
&&
!
strcmp
(
argv
[
1
+
skip_args
],
"-l"
))
Vtop_level
=
Fcons
(
intern
(
"load"
),
Fcons
(
build_string
(
argv
[
2
+
skip_args
]),
Qnil
));
#ifdef CANNOT_DUMP
/* Unless next switch is -nl, load "loadup.el" first thing. */
if
(
!
(
argc
>
1
+
skip_args
&&
!
strcmp
(
argv
[
1
+
skip_args
],
"-nl"
)))
Vtop_level
=
Fcons
(
intern
(
"load"
),
Fcons
(
build_string
(
"loadup.el"
),
Qnil
));
#endif
/* CANNOT_DUMP */
}
initialized
=
1
;
/* Enter editor command loop. This never returns. */
Frecursive_edit
();
/* NOTREACHED */
}
DEFUN
(
"kill-emacs"
,
Fkill_emacs
,
Skill_emacs
,
0
,
1
,
"P"
,
"Exit the Emacs job and kill it. Ask for confirmation, without argument.
\n
\
If ARG is an integer, return ARG as the exit program code.
\n
\
If ARG is a string, stuff it as keyboard input.
\n\n
\
The value of `kill-emacs-hook', if not void,
\n
\
is a list of functions (of no args),
\n
\
all of which are called before Emacs is actually killed."
)
(
arg
)
Lisp_Object
arg
;
{
Lisp_Object
hook
,
hook1
;
int
i
;
struct
gcpro
gcpro1
;
GCPRO1
(
arg
);
if
(
feof
(
stdin
))
arg
=
Qt
;
if
(
!
NULL
(
Vrun_hooks
)
&&
!
noninteractive
)
call1
(
Vrun_hooks
,
intern
(
"kill-emacs-hook"
));
#ifdef subprocesses
kill_buffer_processes
(
Qnil
);
#endif
/* subprocesses */
#ifdef VMS
kill_vms_processes
();
#endif
/* VMS */
Fdo_auto_save
(
Qt
,
Qnil
);
#ifdef CLASH_DETECTION
unlock_all_files
();
#endif
/* CLASH_DETECTION */
fflush
(
stdout
);
reset_sys_modes
();
#ifdef HAVE_X_WINDOWS
if
(
!
noninteractive
&&
EQ
(
Vwindow_system
,
intern
(
"x"
)))
Fx_close_current_connection
();
#endif
/* HAVE_X_WINDOWS */
UNGCPRO
;
/* Is it really necessary to do this deassign
when we are going to exit anyway? */
/* #ifdef VMS
stop_vms_input ();
#endif */
stuff_buffered_input
(
arg
);
#ifdef SIGIO
/* There is a tendency for a SIGIO signal to arrive within exit,
and cause a SIGHUP because the input descriptor is already closed. */
unrequest_sigio
();
signal
(
SIGIO
,
SIG_IGN
);
#endif
exit
((
XTYPE
(
arg
)
==
Lisp_Int
)
?
XINT
(
arg
)
#ifdef VMS
:
1
#else
:
0
#endif
);
/* NOTREACHED */
}
#ifndef CANNOT_DUMP
/* Nothing like this can be implemented on an Apollo.
What a loss! */
#ifdef HAVE_SHM
DEFUN
(
"dump-emacs-data"
,
Fdump_emacs_data
,
Sdump_emacs_data
,
1
,
1
,
0
,
"Dump current state of Emacs into data file FILENAME.
\n
\
This function exists on systems that use HAVE_SHM."
)
(
intoname
)
Lisp_Object
intoname
;
{
extern
int
my_edata
;
Lisp_Object
tem
;
extern
void
malloc_warning
();
CHECK_STRING
(
intoname
,
0
);
intoname
=
Fexpand_file_name
(
intoname
,
Qnil
);
tem
=
Vpurify_flag
;
Vpurify_flag
=
Qnil
;
fflush
(
stdout
);
/* Tell malloc where start of impure now is */
/* Also arrange for warnings when nearly out of space. */
#ifndef SYSTEM_MALLOC
malloc_init
(
&
my_edata
,
malloc_warning
);
#endif
map_out_data
(
XSTRING
(
intoname
)
->
data
);
Vpurify_flag
=
tem
;
return
Qnil
;
}
#else
/* not HAVE_SHM */
DEFUN
(
"dump-emacs"
,
Fdump_emacs
,
Sdump_emacs
,
2
,
2
,
0
,
"Dump current state of Emacs into executable file FILENAME.
\n
\
Take symbols from SYMFILE (presumably the file you executed to run Emacs).
\n
\