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emacs.c
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emacs.c
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/* emacs.c: Fully extensible Emacs, running on Unix, intended for GNU.
* Contains the main() function. */
/*
Copyright (C) 1985-1987, 1993-1995, 1997-1999, 2001-2014 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>. */
#define INLINE EXTERN_INLINE
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/file.h>
#include <unistd.h>
#include <close-stream.h>
#define MAIN_PROGRAM
#include "lisp.h"
#ifdef WINDOWSNT
# include <fcntl.h>
# include <sys/socket.h>
# include <mbstring.h>
# include "w32.h"
# include "w32heap.h"
#endif /* WINDOWSNT */
#if defined WINDOWSNT || defined HAVE_NTGUI
# include "w32select.h"
# include "w32font.h"
# include "w32common.h"
#endif /* WINDOWSNT || HAVE_NTGUI */
#if defined CYGWIN
# include "cygw32.h"
#endif /* CYGWIN */
#ifdef HAVE_WINDOW_SYSTEM
# include TERM_HEADER
#endif /* HAVE_WINDOW_SYSTEM */
#ifdef NS_IMPL_GNUSTEP
/* At least under Debian, GSConfig is in a subdirectory. --Stef */
# include <GNUstepBase/GSConfig.h>
#endif /* NS_IMPL_GNUSTEP */
#include "commands.h"
#include "intervals.h"
#include "character.h"
#include "buffer.h"
#include "window.h"
#include "systty.h"
#include "atimer.h"
#include "blockinput.h"
#include "syssignal.h"
#include "process.h"
#include "frame.h"
#include "termhooks.h"
#include "keyboard.h"
#include "keymap.h"
#include "category.h"
#include "charset.h"
#include "composite.h"
#include "dispextern.h"
#include "syntax.h"
#include "systime.h"
#ifdef HAVE_GNUTLS
# include "gnutls.h"
#endif /* HAVE_GNUTLS */
#if (defined PROFILING \
&& (defined __FreeBSD__ || defined GNU_LINUX || defined __MINGW32__))
# include <sys/gmon.h>
extern void moncontrol(int mode);
#endif /* PROFILING && (__FreeBSD__ || GNU_LINUX || __MINGW32__) */
#ifdef HAVE_SETLOCALE
# include <locale.h>
#endif /* HAVE_SETLOCALE */
#ifdef HAVE_SETRLIMIT
# include <sys/time.h>
# include <sys/resource.h>
#endif /* HAVE_SETRLIMIT */
#ifdef HAVE_PERSONALITY_LINUX32
# include <sys/personality.h>
#endif /* HAVE_PERSONALITY_LINUX32 */
static const char emacs_version[] = VERSION;
static const char emacs_copyright[] = COPYRIGHT;
/* Empty lisp strings. To avoid having to build any others. */
Lisp_Object empty_unibyte_string, empty_multibyte_string;
#ifdef WINDOWSNT
/* Cache for externally loaded libraries. */
Lisp_Object Vlibrary_cache;
#endif /* WINDOWSNT */
/* Set after Emacs has started up the first time.
Prevents reinitialization of the Lisp world and keymaps
on subsequent starts. */
bool initialized;
#ifdef DARWIN_OS
extern void unexec_init_emacs_zone(void);
#endif /* DARWIN_OS */
#ifdef DOUG_LEA_MALLOC
/* Preserves a pointer to the memory allocated that copies that
static data inside glibc's malloc. */
static void *malloc_state_ptr;
/* From glibc, a routine that returns a copy of the malloc internal state. */
extern void *malloc_get_state(void);
/* From glibc, a routine that overwrites the malloc internal state. */
extern int malloc_set_state(void *);
/* True if the MALLOC_CHECK_ environment variable was set while
dumping. Used to work around a bug in glibc's malloc. */
static bool malloc_using_checking;
#elif defined HAVE_PTHREAD && !defined SYSTEM_MALLOC
extern void malloc_enable_thread(void);
#endif /* DOUG_LEA_MALLOC || (HAVE_PTHREAD && !SYSTEM_MALLOC) */
Lisp_Object Qfile_name_handler_alist;
Lisp_Object Qrisky_local_variable;
Lisp_Object Qkill_emacs;
static Lisp_Object Qkill_emacs_hook;
/* If true, Emacs should not attempt to use a window-specific code,
but instead should use the virtual terminal under which it was started. */
bool inhibit_window_system;
/* If true, a filter or a sentinel is running. Tested to save the match
data on the first attempt to change it inside asynchronous code. */
bool running_asynch_code;
#if defined(HAVE_X_WINDOWS) || defined(HAVE_NS)
/* If true, -d was specified, meaning we are using some window system: */
bool display_arg;
#endif /* HAVE_X_WINDOWS || HAVE_NS */
/* An address near the bottom of the stack.
Tells GC how to save a copy of the stack. */
char *stack_bottom;
#if defined(DOUG_LEA_MALLOC) || defined(GNU_LINUX)
/* The address where the heap starts (from the first sbrk (0) call). */
static void *my_heap_start;
#endif /* DOUG_LEA_MALLOC || GNU_LINUX */
#ifdef GNU_LINUX
/* The gap between BSS end and heap start as far as we can tell. */
static uprintmax_t heap_bss_diff;
#endif /* GNU_LINUX */
/* To run as a daemon under Cocoa or Windows, we must do a fork+exec,
not a simple fork.
On Cocoa, CoreFoundation lib fails in forked process:
http://developer.apple.com/ReleaseNotes/CoreFoundation/CoreFoundation.html
On Windows, a Cygwin fork child cannot access the USER subsystem.
We mark being in the exec'd process by a daemon name argument of
form "--daemon=\nFD0,FD1\nNAME" where FD are the pipe file descriptors,
NAME is the original daemon name, if any. */
#if defined NS_IMPL_COCOA || (defined HAVE_NTGUI && defined CYGWIN)
# define DAEMON_MUST_EXEC
#endif /* NS_IMPL_COCOA || (HAVE_NTGUI && CYGWIN) */
/* True means running Emacs without interactive terminal. */
bool noninteractive;
/* True means remove site-lisp directories from load-path. */
bool no_site_lisp;
/* Name for the server started by the daemon.*/
static char *daemon_name;
/* Pipe used to send exit notification to the daemon parent at
startup. */
int daemon_pipe[2];
/* Save argv and argc. */
char **initial_argv;
int initial_argc;
static void sort_args(int argc, char **argv);
static void syms_of_emacs(void);
/* C89 needs each string be at most 509 characters, so the usage
strings below are split to not overflow this limit. */
static char const *const usage_message[] =
{ "\
\n\
Run Emacs, the extensible, customizable, self-documenting real-time\n\
display editor. The recommended way to start Emacs for normal editing\n\
is with no options at all.\n\
\n\
Run M-x info RET m emacs RET m emacs invocation RET inside Emacs to\n\
read the main documentation for these command-line arguments.\n\
\n\
Initialization options:\n\
\n\
",
"\
--batch do not do interactive display; implies -q\n\
--chdir DIR change to directory DIR\n\
--daemon start a server in the background\n\
--debug-init enable Emacs Lisp debugger for init file\n\
--display, -d DISPLAY use X server DISPLAY\n\
",
"\
--no-desktop do not load a saved desktop\n\
--no-init-file, -q load neither ~/.emacs nor default.el\n\
--no-shared-memory, -nl do not use shared memory\n\
--no-site-file do not load site-start.el\n\
--no-site-lisp, -nsl do not add site-lisp directories to load-path\n\
--no-splash do not display a splash screen on startup\n\
--no-window-system, -nw do not communicate with X, ignoring $DISPLAY\n\
",
"\
--quick, -Q equivalent to:\n\
-q --no-site-file --no-site-lisp --no-splash\n\
--script FILE run FILE as an Emacs Lisp script\n\
--terminal, -t DEVICE use DEVICE for terminal I/O\n\
--user, -u USER load ~USER/.emacs instead of your own\n\
\n\
",
"\
Action options:\n\
\n\
FILE visit FILE using find-file\n\
+LINE go to line LINE in next FILE\n\
+LINE:COLUMN go to line LINE, column COLUMN, in next FILE\n\
--directory, -L DIR prepend DIR to load-path (with :DIR, append DIR)\n\
--eval EXPR evaluate Emacs Lisp expression EXPR\n\
--execute EXPR evaluate Emacs Lisp expression EXPR\n\
",
"\
--file FILE visit FILE using find-file\n\
--find-file FILE visit FILE using find-file\n\
--funcall, -f FUNC call Emacs Lisp function FUNC with no arguments\n\
--insert FILE insert contents of FILE into current buffer\n\
--kill exit without asking for confirmation\n\
--load, -l FILE load Emacs Lisp FILE using the load function\n\
--visit FILE visit FILE using find-file\n\
\n\
",
"\
Display options:\n\
\n\
--background-color, -bg COLOR window background color\n\
--basic-display, -D disable many display features;\n\
used for debugging Emacs\n\
--border-color, -bd COLOR main border color\n\
--border-width, -bw WIDTH width of main border\n\
",
"\
--color, --color=MODE override color mode for character terminals;\n\
MODE defaults to `auto', and\n\
can also be `never', `always',\n\
or a mode name like `ansi8'\n\
--cursor-color, -cr COLOR color of the Emacs cursor indicating point\n\
--font, -fn FONT default font; must be fixed-width\n\
--foreground-color, -fg COLOR window foreground color\n\
",
"\
--fullheight, -fh make the first frame high as the screen\n\
--fullscreen, -fs make the first frame fullscreen\n\
--fullwidth, -fw make the first frame wide as the screen\n\
--maximized, -mm make the first frame maximized\n\
--geometry, -g GEOMETRY window geometry\n\
",
"\
--no-bitmap-icon, -nbi do not use picture of gnu for Emacs icon\n\
--iconic start Emacs in iconified state\n\
--internal-border, -ib WIDTH width between text and main border\n\
--line-spacing, -lsp PIXELS additional space to put between lines\n\
--mouse-color, -ms COLOR mouse cursor color in Emacs window\n\
--name NAME title for initial Emacs frame\n\
",
"\
--no-blinking-cursor, -nbc disable blinking cursor\n\
--reverse-video, -r, -rv switch foreground and background\n\
--title, -T TITLE title for initial Emacs frame\n\
--vertical-scroll-bars, -vb enable vertical scroll bars\n\
--xrm XRESOURCES set additional X resources\n\
--parent-id XID set parent window\n\
--help display this help and exit\n\
--version output version information and exit\n\
\n\
",
"\
You can generally also specify long option names with a single -; for\n\
example, -batch as well as --batch. You can use any unambiguous\n\
abbreviation for a --option.\n\
\n\
Various environment variables and window system resources also affect\n\
the operation of Emacs. See the main documentation.\n\
\n\
Report bugs to bug-gnu-emacs@gnu.org. First, please see the Bugs\n\
section of the Emacs manual or the file BUGS.\n"
};
/* True if handling a fatal error already. */
bool fatal_error_in_progress;
#ifdef HAVE_NS
/* NS autrelease pool, for memory management: */
static void *ns_pool;
#endif /* HAVE_NS */
#if !HAVE_SETLOCALE
static char *
setlocale(int cat, char const *locale)
{
return 0;
}
#endif /* !HAVE_SETLOCALE */
/* Report a fatal error due to signal SIG, output a backtrace of at
most BACKTRACE_LIMIT lines, and exit. */
_Noreturn void
terminate_due_to_signal(int sig, int backtrace_limit)
{
signal(sig, SIG_DFL);
totally_unblock_input();
/* If fatal error occurs in code below, avoid infinite recursion. */
if (! fatal_error_in_progress)
{
fatal_error_in_progress = 1;
if ((sig == SIGTERM) || (sig == SIGHUP) || (sig == SIGINT))
Fkill_emacs(make_number(sig));
shut_down_emacs(sig, Qnil);
emacs_backtrace(backtrace_limit);
}
/* Signal the same code; this time it will really be fatal.
Since we're in a signal handler, the signal is blocked, so we
have to unblock it if we want to really receive it. */
#ifndef MSDOS
{
sigset_t unblocked;
sigemptyset(&unblocked);
sigaddset(&unblocked, sig);
pthread_sigmask(SIG_UNBLOCK, &unblocked, 0);
}
#endif /* MSDOS */
emacs_raise(sig);
/* This should NOT be executed, but it prevents a warning: */
exit(1);
}
/* Code for dealing with Lisp access to the Unix command line: */
static void
init_cmdargs(int argc, char **argv, int skip_args, char *original_pwd)
{
register int i;
Lisp_Object name, dir, handler;
ptrdiff_t count = SPECPDL_INDEX();
Lisp_Object raw_name;
initial_argv = argv;
initial_argc = argc;
#ifdef WINDOWSNT
/* Must use argv[0] converted to UTF-8, as it begets many standard
file and directory names. */
{
char argv0[MAX_UTF8_PATH];
if (filename_from_ansi(argv[0], argv0) == 0)
raw_name = build_unibyte_string(argv0);
else
raw_name = build_unibyte_string(argv[0]);
}
#else
raw_name = build_unibyte_string(argv[0]);
#endif /* WINDOWSNT */
/* Add /: to the front of the name
if it would otherwise be treated as magic. */
handler = Ffind_file_name_handler (raw_name, Qt);
if (! NILP (handler))
raw_name = concat2 (build_string ("/:"), raw_name);
Vinvocation_name = Ffile_name_nondirectory (raw_name);
Vinvocation_directory = Ffile_name_directory (raw_name);
/* If we got no directory in argv[0], search PATH to find where
Emacs actually came from. */
if (NILP (Vinvocation_directory))
{
Lisp_Object found;
int yes = openp (Vexec_path, Vinvocation_name,
Vexec_suffixes, &found, make_number (X_OK), false);
if (yes == 1)
{
/* Add /: to the front of the name
if it would otherwise be treated as magic. */
handler = Ffind_file_name_handler (found, Qt);
if (! NILP (handler))
found = concat2 (build_string ("/:"), found);
Vinvocation_directory = Ffile_name_directory (found);
}
}
if (!NILP (Vinvocation_directory)
&& NILP (Ffile_name_absolute_p (Vinvocation_directory)))
/* Emacs was started with relative path, like ./emacs.
Make it absolute. */
{
Lisp_Object odir =
original_pwd ? build_unibyte_string (original_pwd) : Qnil;
Vinvocation_directory = Fexpand_file_name (Vinvocation_directory, odir);
}
Vinstallation_directory = Qnil;
if (!NILP (Vinvocation_directory))
{
dir = Vinvocation_directory;
#ifdef WINDOWSNT
/* If we are running from the build directory, set DIR to the
src subdirectory of the Emacs tree, like on Posix
platforms. */
if (SBYTES(dir) > (sizeof("/i386/") - 1)
&& 0 == strcmp(SSDATA(dir) + SBYTES(dir) - sizeof("/i386/") + 1,
"/i386/"))
dir = Fexpand_file_name(build_string("../.."), dir);
#else /* !WINDOWSNT: */
;
#endif /* WINDOWSNT */
name = Fexpand_file_name(Vinvocation_name, dir);
while (1)
{
Lisp_Object tem, lib_src_exists;
Lisp_Object etc_exists, info_exists;
/* See if dir contains subdirs for use by Emacs.
Check for the ones that would exist in a build directory,
not including lisp and info. */
tem = Fexpand_file_name (build_string ("lib-src"), dir);
lib_src_exists = Ffile_exists_p (tem);
#ifdef MSDOS
/* MSDOS installations frequently remove lib-src, but we still
must set installation-directory, or else info won't find
its files (it uses the value of installation-directory). */
tem = Fexpand_file_name (build_string ("info"), dir);
info_exists = Ffile_exists_p (tem);
#else
info_exists = Qnil;
#endif
if (!NILP (lib_src_exists) || !NILP (info_exists))
{
tem = Fexpand_file_name (build_string ("etc"), dir);
etc_exists = Ffile_exists_p (tem);
if (!NILP (etc_exists))
{
Vinstallation_directory
= Ffile_name_as_directory (dir);
break;
}
}
/* See if dir's parent contains those subdirs. */
tem = Fexpand_file_name (build_string ("../lib-src"), dir);
lib_src_exists = Ffile_exists_p (tem);
#ifdef MSDOS
/* See the MSDOS commentary above. */
tem = Fexpand_file_name (build_string ("../info"), dir);
info_exists = Ffile_exists_p (tem);
#else
info_exists = Qnil;
#endif
if (!NILP (lib_src_exists) || !NILP (info_exists))
{
tem = Fexpand_file_name (build_string ("../etc"), dir);
etc_exists = Ffile_exists_p (tem);
if (!NILP (etc_exists))
{
tem = Fexpand_file_name (build_string (".."), dir);
Vinstallation_directory
= Ffile_name_as_directory (tem);
break;
}
}
/* If the Emacs executable is actually a link,
next try the dir that the link points into. */
tem = Ffile_symlink_p (name);
if (!NILP (tem))
{
name = Fexpand_file_name (tem, dir);
dir = Ffile_name_directory (name);
}
else
break;
}
}
Vcommand_line_args = Qnil;
for (i = argc - 1; i >= 0; i--)
{
if (i == 0 || i > skip_args)
/* For the moment, we keep arguments as is in unibyte strings.
They are decoded in the function command-line after we know
locale-coding-system. */
Vcommand_line_args
= Fcons (build_unibyte_string (argv[i]), Vcommand_line_args);
}
unbind_to (count, Qnil);
}
DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0,
doc: /* Return the program name that was used to run Emacs.
Any directory names are omitted. */)
(void)
{
return Fcopy_sequence (Vinvocation_name);
}
DEFUN ("invocation-directory", Finvocation_directory, Sinvocation_directory,
0, 0, 0,
doc: /* Return the directory name in which the Emacs executable was located. */)
(void)
{
return Fcopy_sequence (Vinvocation_directory);
}
#ifdef HAVE_TZSET
/* A valid but unlikely value for the TZ environment value.
It is OK (though a bit slower) if the user actually chooses this value. */
static char const dump_tz[] = "UtC0";
#endif /* HAVE_TZSET */
/* Test whether the next argument in ARGV matches SSTR or a prefix of
LSTR (at least MINLEN characters). If so, then if VALPTR is non-null
(the argument is supposed to have a value) store in *VALPTR either
the next argument or the portion of this one after the equal sign.
ARGV is read starting at position *SKIPPTR; this index is advanced
by the number of arguments used.
Too bad we can't just use getopt for all of this, but we don't have
enough information to do it right. */
static bool
argmatch (char **argv, int argc, const char *sstr, const char *lstr,
int minlen, char **valptr, int *skipptr)
{
char *p = NULL;
ptrdiff_t arglen;
char *arg;
/* Don't access argv[argc]; give up in advance. */
if (argc <= *skipptr + 1)
return 0;
arg = argv[*skipptr+1];
if (arg == NULL)
return 0;
if (strcmp (arg, sstr) == 0)
{
if (valptr != NULL)
{
*valptr = argv[*skipptr+2];
*skipptr += 2;
}
else
*skipptr += 1;
return 1;
}
arglen = (valptr != NULL && (p = strchr (arg, '=')) != NULL
? p - arg : strlen (arg));
if (lstr == 0 || arglen < minlen || strncmp (arg, lstr, arglen) != 0)
return 0;
else if (valptr == NULL)
{
*skipptr += 1;
return 1;
}
else if (p != NULL)
{
*valptr = p+1;
*skipptr += 1;
return 1;
}
else if (argv[*skipptr+2] != NULL)
{
*valptr = argv[*skipptr+2];
*skipptr += 2;
return 1;
}
else
{
return 0;
}
}
#ifdef DOUG_LEA_MALLOC
/* malloc can be invoked even before main (e.g. by the dynamic
linker), so the dumped malloc state must be restored as early as
possible using this special hook. */
static void
malloc_initialize_hook(void)
{
if (initialized)
{
if (!malloc_using_checking)
/* Work around a bug in glibc's malloc. MALLOC_CHECK_ must be
ignored if the heap to be restored was constructed without
malloc checking. Can't use unsetenv, since that calls malloc. */
{
char **p;
for (p = environ; p && *p; p++)
if (strncmp(*p, "MALLOC_CHECK_=", 14) == 0)
{
do {
*p = p[1];
} while (*++p);
break;
}
}
malloc_set_state(malloc_state_ptr);
# ifndef XMALLOC_OVERRUN_CHECK
free(malloc_state_ptr);
# endif /* !XMALLOC_OVERRUN_CHECK */
}
else
{
if (my_heap_start == 0)
my_heap_start = sbrk(0);
malloc_using_checking = (getenv("MALLOC_CHECK_") != NULL);
}
}
void (*__malloc_initialize_hook)(void) EXTERNALLY_VISIBLE = malloc_initialize_hook;
#endif /* DOUG_LEA_MALLOC */
/* Close standard output and standard error, reporting any write
errors as best we can. This is intended for use with atexit. */
static void
close_output_streams(void)
{
if (close_stream(stdout) != 0)
{
emacs_perror("Write error to standard output");
_exit(EXIT_FAILURE);
}
if (close_stream(stderr) != 0)
_exit(EXIT_FAILURE);
}
/* The all-important main() function. When debugging, start here. */
/* ARGSUSED */
int
main(int argc, char **argv)
{
#if GC_MARK_STACK
Lisp_Object dummy;
#endif /* GC_MARK_STACK */
char stack_bottom_variable;
bool do_initial_setlocale;
bool dumping;
int skip_args = 0;
#ifdef HAVE_SETRLIMIT
struct rlimit rlim;
#endif /* HAVE_SETRLIMIT */
bool no_loadup = 0;
char *junk = 0;
char *dname_arg = 0;
#ifdef DAEMON_MUST_EXEC
char dname_arg2[80];
#endif /* DAEMON_MUST_EXEC */
char *ch_to_dir;
/* If we use --chdir, this records the original directory. */
char *original_pwd = 0;
#if defined(DEBUG) || defined(VERBOSE) || defined(_DEBUG) || defined(__APPLE__)
printf("%s, line %d: Hello.\n", __FILE__, __LINE__);
#endif /* DEBUG || VERBOSE || _DEBUG || __APPLE__ */
#if GC_MARK_STACK
stack_base = &dummy;
#elif defined(DEBUG)
printf("GC_MARK_STACK not defined.\n");
#endif /* GC_MARK_STACK */
#ifdef G_SLICE_ALWAYS_MALLOC
/* This is used by the Cygwin build. It's not needed starting with
cygwin-1.7.24, but it doesn't do any harm. */
xputenv("G_SLICE=always-malloc");
#elif defined(DEBUG)
printf("G_SLICE_ALWAYS_MALLOC not defined.\n");
#endif /* G_SLICE_ALWAYS_MALLOC */
#ifdef GNU_LINUX
if (!initialized)
{
extern char my_endbss[];
extern char *my_endbss_static;
if (my_heap_start == 0)
my_heap_start = sbrk(0);
heap_bss_diff = ((char *)my_heap_start - max(my_endbss,
my_endbss_static));
}
#elif defined(DEBUG)
printf("skipping GNU/Linux-specific initializaion.\n");
#endif /* GNU_LINUX */
#if defined WINDOWSNT || defined HAVE_NTGUI
/* Set global variables used to detect Windows version. Do this as
early as possible. (unexw32.c calls this function as well, but
the additional call here is harmless.) */
cache_system_info();
# ifdef WINDOWSNT
/* On Windows 9X, we have to load UNICOWS.DLL as early as possible,
to have non-stub implementations of APIs we need to convert file
names between UTF-8 and the system's ANSI codepage. */
maybe_load_unicows_dll();
# endif /* WINDOWSNT */
#endif /* WINDOWSNT || HAVE_NTGUI */
/* do this before anything else uses argc and/or argv: */
#ifdef DEBUG
printf("Program is running from path '%s' with '%i' argument(s).\n",
argv[0], argc);
#endif /* DEBUG */
#ifdef RUN_TIME_REMAP
if (initialized)
run_time_remap(argv[0]);
#elif defined(DEBUG)
printf("Skipping run-time remapping...\n");
#endif /* RUN_TIME_REMAP */
/* If using unexmacosx.c (set by s/darwin.h), then we must do this: */
#ifdef DARWIN_OS
if (!initialized) {
# if defined(DEBUG) || defined(VERBOSE)
printf("initializing emacs zone for unexec-ing...\n");
# endif /* DEBUG || VERBOSE */
unexec_init_emacs_zone();
}
# if defined(__PREFIX__) || defined(MAC_OS) || defined(PATH) || \
(defined(HAVE_STRLCPY) && defined(HAVE_STRLCAT))
/* Imaxima will fail to work properly if PATH does not contain the
* MacPorts directory. The following code is a workaround to
* avoid this problem: */
if (system("test -x `which imaxima 2>/dev/null`") && (getenv("PATH") != NULL)) {
char *oldpath = getenv("PATH");
size_t oldpathsize;
if (!oldpath) { oldpath = (char *)""; }
oldpathsize = (strlen(oldpath) + 1UL);
if (!strstr(oldpath, "__PREFIX__/bin")) {
char *newpath;
size_t newpathsize = (oldpathsize + strlen("__PREFIX__/bin:"));
if ((newpath = (char *)malloc(newpathsize)) != NULL) {
printf("Allocated new pointer for PATH: %p.\n", (void *)newpath);
strlcpy(newpath, "__PREFIX__/bin:", newpathsize);
strlcat(newpath, oldpath, newpathsize);
setenv("PATH", newpath, 1);
free(newpath); /* FIXME: pointer being freed was not allocated */
} else {
printf("Failed to allocate new PATH.\n");
}
} else {
printf("Skipping PATH modification...\n");
}
} else if (system("test -x `which port 2>/dev/null`")) {
printf("Skipping imaxima hack.\n");
}
# else
# if defined(__GNUC__) && !defined(__STRICT_ANSI__) && defined(lint) && \
defined(__APPLE__) && defined(emacs)
# warning "Emacs will be unable to modify its path properly."
# endif /* __GNUC__ && !__STRICT_ANSI__ && lint && __APPLE__ && emacs */
# endif /* __PREFIX__ || MAC_OS || PATH || (HAVE_STRLCPY & HAVE_STRLCAT) */
#endif /* DARWIN_OS */
atexit(close_output_streams);
#if defined(DEBUG) || defined(VERBOSE)
printf("Parsing arguments...\n");
#endif /* DEBUG || VERBOSE */
sort_args(argc, argv);
argc = 0;
while (argv[argc]) argc++;
if (argmatch(argv, argc, "-version", "--version", 3, NULL, &skip_args))
{
const char *version, *copyright;
if (initialized)
{
Lisp_Object tem, tem2;
tem = Fsymbol_value(intern_c_string("emacs-version"));
tem2 = Fsymbol_value(intern_c_string("emacs-copyright"));
if (!STRINGP(tem))
{
fprintf(stderr, "Invalid value of `emacs-version'\n");
exit(1);
}
if (!STRINGP(tem2))
{
fprintf(stderr, "Invalid value of `emacs-copyright'\n");
exit(1);
}
else
{
version = SSDATA(tem);
copyright = SSDATA(tem2);
}
}
else
{
version = emacs_version;
copyright = emacs_copyright;
}
printf("GNU Emacs %s\n", version);
printf("%s\n", copyright);
printf("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
printf("You may redistribute copies of Emacs\n");
printf("under the terms of the GNU General Public License.\n");
printf("For more information about these matters, ");
printf("see the file named COPYING.\n");
exit(0);
}
else
{
printf("Skipping printing version info.\n");
}
if (argmatch(argv, argc, "-chdir", "--chdir", 4, &ch_to_dir, &skip_args))
{
#ifdef WINDOWSNT
/* argv[] array is kept in its original ANSI codepage encoding,
we need to convert to UTF-8, for chdir to work. */
char newdir[MAX_UTF8_PATH];
filename_from_ansi(ch_to_dir, newdir);
ch_to_dir = newdir;
#endif /* WINDOWSNT */
original_pwd = get_current_dir_name();
if (chdir(ch_to_dir) != 0)
{
fprintf(stderr, "%s: Cannot chdir to %s: %s\n",
argv[0], ch_to_dir, strerror(errno));
exit(1);
}
}
else
{
printf("Continuing from current directory.\n");
}
dumping = !initialized && (strcmp(argv[argc - 1], "dump") == 0
|| strcmp(argv[argc - 1], "bootstrap") == 0);
if (dumping)
printf("Dumping...\n");
else
printf("Skipping dumping.\n");
#ifdef HAVE_PERSONALITY_LINUX32
if (dumping && ! getenv("EMACS_HEAP_EXEC"))
{
/* Set this so we only do this once: */
xputenv("EMACS_HEAP_EXEC=true");
/* A flag to turn off address randomization which is introduced
in linux kernel shipped with fedora core 4 */
# define ADD_NO_RANDOMIZE 0x0040000
personality(PER_LINUX32 | ADD_NO_RANDOMIZE);
# undef ADD_NO_RANDOMIZE
execvp(argv[0], argv);
/* If the exec fails, then try to dump anyway: */
emacs_perror(argv[0]);
}
#endif /* HAVE_PERSONALITY_LINUX32 */
#if defined(HAVE_SETRLIMIT) && defined(RLIMIT_STACK)
/* Extend the stack space available.
Don't do that if dumping, since some systems (e.g. DJGPP)
might define a smaller stack limit at that time. */
if (1
# ifndef CANNOT_DUMP
&& (!noninteractive || initialized)
# endif /* !CANNOT_DUMP */
&& !getrlimit(RLIMIT_STACK, &rlim))
{
long newlim;
extern size_t re_max_failures;
/* Approximate the amount regex.c needs per unit of re_max_failures. */
int ratio = (20 * sizeof(char *));
/* Then add 33% to cover the size of the smaller stacks that regex.c
successively allocates and discards, on its way to the maximum: */
ratio += (ratio / 3);
/* Add in some extra to cover what we are likely to use for other
* reasons: */
newlim = (long)((re_max_failures * (size_t)ratio) + 200000L);
# ifdef __NetBSD__
/* NetBSD (at least NetBSD 1.2G and former) has a bug in its
stack allocation routine for new process that the allocation
fails if stack limit is not on page boundary. So, round up the
new limit to page boundary. */
newlim = ((newlim + getpagesize() - 1)
/ getpagesize() * getpagesize());
# endif /* __NetBSD__ */
if ((rlim_t)newlim > rlim.rlim_max)
{
newlim = (long)rlim.rlim_max;
/* Do NOT let regex.c overflow the stack that we have: */
re_max_failures = (size_t)((newlim - 200000L) / ratio);
}
if (rlim.rlim_cur < (rlim_t)newlim)
rlim.rlim_cur = (rlim_t)newlim;
setrlimit(RLIMIT_STACK, &rlim);
}
#elif defined(DEBUG)
printf("Skipping messing with rlimit...\n");
#endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
/* Record (approximately) where the stack begins: */
stack_bottom = &stack_bottom_variable;
clearerr(stdin);
#ifndef SYSTEM_MALLOC
/* Arrange to get warning messages as memory fills up: */
memory_warnings(0, malloc_warning);
/* Call malloc at least once, to run malloc_initialize_hook.
Also call realloc and free for consistency. */
free(realloc(malloc(4), 4));
#elif defined(DEBUG)
printf("Using system malloc.\n");
#endif /* not SYSTEM_MALLOC */
#if defined(MSDOS) || defined(WINDOWSNT)
/* We do all file input/output as binary files. When we need to translate
newlines, we do that manually. */
_fmode = O_BINARY;
#endif /* MSDOS || WINDOWSNT */
#ifdef MSDOS
if (!isatty(fileno(stdin)))