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/* System dependent declarations.
Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1998, 2001, 2002,
2004, 2006 Free Software Foundation, Inc.
This file is part of GNU DIFF.
GNU DIFF 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 2, or (at your option)
any later version.
GNU DIFF 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 this program; see the file COPYING.
If not, write to the Free Software Foundation,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <config.h>
/* Use this to suppress gcc's `...may be used before initialized' warnings. */
#ifdef lint
# define IF_LINT(Code) Code
#else
# define IF_LINT(Code) /* empty */
#endif
/* Define `__attribute__' and `volatile' first
so that they're used consistently in all system includes. */
#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) || __STRICT_ANSI__
# define __attribute__(x)
#endif
#include <verify.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "stat-macros.h"
#ifndef STAT_BLOCKSIZE
# if HAVE_STRUCT_STAT_ST_BLKSIZE
# define STAT_BLOCKSIZE(s) ((s).st_blksize)
# else
# define STAT_BLOCKSIZE(s) (8 * 1024)
# endif
#endif
#include <unistd.h>
#ifndef STDIN_FILENO
# define STDIN_FILENO 0
#endif
#ifndef STDOUT_FILENO
# define STDOUT_FILENO 1
#endif
#ifndef STDERR_FILENO
# define STDERR_FILENO 2
#endif
#include <fcntl.h>
#include <time.h>
#if HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#ifndef WEXITSTATUS
# define WEXITSTATUS(stat_val) ((unsigned int) (stat_val) >> 8)
#endif
#ifndef WIFEXITED
# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#endif
#include <dirent.h>
#ifndef _D_EXACT_NAMLEN
# define _D_EXACT_NAMLEN(dp) strlen ((dp)->d_name)
#endif
#include <stdlib.h>
#define EXIT_TROUBLE 2
#include <limits.h>
#include <locale.h>
#include <stddef.h>
#include <inttypes.h>
#include <string.h>
#if ! HAVE_STRCASECOLL
# if HAVE_STRICOLL || defined stricoll
# define strcasecoll(a, b) stricoll (a, b)
# else
# define strcasecoll(a, b) strcasecmp (a, b) /* best we can do */
# endif
#endif
#if ! (HAVE_STRCASECMP || defined strcasecmp)
int strcasecmp (char const *, char const *);
#endif
#include <gettext.h>
#define _(msgid) gettext (msgid)
#define N_(msgid) msgid
#include <ctype.h>
/* ISDIGIT differs from isdigit, as follows:
- Its arg may be any int or unsigned int; it need not be an unsigned char.
- It's guaranteed to evaluate its argument exactly once.
- It's typically faster.
POSIX 1003.1-2001 says that only '0' through '9' are digits.
Prefer ISDIGIT to isdigit unless it's important to use the locale's
definition of `digit' even when the host does not conform to POSIX. */
#define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
#include <errno.h>
#include <signal.h>
#ifndef SA_RESTART
# ifdef SA_INTERRUPT /* e.g. SunOS 4.1.x */
# define SA_RESTART SA_INTERRUPT
# else
# define SA_RESTART 0
# endif
#endif
#if !defined SIGCHLD && defined SIGCLD
# define SIGCHLD SIGCLD
#endif
#undef MIN
#undef MAX
#define MIN(a, b) ((a) <= (b) ? (a) : (b))
#define MAX(a, b) ((a) >= (b) ? (a) : (b))
#include <stdbool.h>
#if HAVE_VFORK_H
# include <vfork.h>
#endif
#if ! HAVE_WORKING_VFORK
# define vfork fork
#endif
#include <intprops.h>
/* Type used for fast comparison of several bytes at a time. */
#ifndef word
# define word uintmax_t
#endif
/* The integer type of a line number. Since files are read into main
memory, ptrdiff_t should be wide enough. */
typedef ptrdiff_t lin;
#define LIN_MAX PTRDIFF_MAX
verify (TYPE_SIGNED (lin));
verify (sizeof (ptrdiff_t) <= sizeof (lin));
verify (sizeof (lin) <= sizeof (long int));
/* This section contains POSIX-compliant defaults for macros
that are meant to be overridden by hand in config.h as needed. */
#ifndef file_name_cmp
# define file_name_cmp strcmp
#endif
#ifndef initialize_main
# define initialize_main(argcp, argvp)
#endif
#ifndef NULL_DEVICE
# define NULL_DEVICE "/dev/null"
#endif
/* Do struct stat *S, *T describe the same special file? */
#ifndef same_special_file
# if HAVE_ST_RDEV && defined S_ISBLK && defined S_ISCHR
# define same_special_file(s, t) \
(((S_ISBLK ((s)->st_mode) && S_ISBLK ((t)->st_mode)) \
|| (S_ISCHR ((s)->st_mode) && S_ISCHR ((t)->st_mode))) \
&& (s)->st_rdev == (t)->st_rdev)
# else
# define same_special_file(s, t) 0
# endif
#endif
/* Do struct stat *S, *T describe the same file? Answer -1 if unknown. */
#ifndef same_file
# define same_file(s, t) \
((((s)->st_ino == (t)->st_ino) && ((s)->st_dev == (t)->st_dev)) \
|| same_special_file (s, t))
#endif
/* Do struct stat *S, *T have the same file attributes?
POSIX says that two files are identical if st_ino and st_dev are
the same, but many filesystems incorrectly assign the same (device,
inode) pair to two distinct files, including:
- GNU/Linux NFS servers that export all local filesystems as a
single NFS filesystem, if a local device number (st_dev) exceeds
255, or if a local inode number (st_ino) exceeds 16777215.
- Network Appliance NFS servers in snapshot directories; see
Network Appliance bug #195.
- ClearCase MVFS; see bug id ATRia04618.
Check whether two files that purport to be the same have the same
attributes, to work around instances of this common bug. Do not
inspect all attributes, only attributes useful in checking for this
bug.
It's possible for two distinct files on a buggy filesystem to have
the same attributes, but it's not worth slowing down all
implementations (or complicating the configuration) to cater to
these rare cases in buggy implementations. */
#ifndef same_file_attributes
# define same_file_attributes(s, t) \
((s)->st_mode == (t)->st_mode \
&& (s)->st_nlink == (t)->st_nlink \
&& (s)->st_uid == (t)->st_uid \
&& (s)->st_gid == (t)->st_gid \
&& (s)->st_size == (t)->st_size \
&& (s)->st_mtime == (t)->st_mtime \
&& (s)->st_ctime == (t)->st_ctime)
#endif
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