eb/libebutils/samefile.c
2016-10-28 20:02:30 -07:00

68 lines
2.5 KiB
C

/* -*- C -*-
* Copyright (c) 1998-2006 Motoyuki Kasahara
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
/*
* If the files `file_name1' and `file_name2' are identical (i.e. the are
* written on a same device and a same i-node is assigned to them), 1 is
* returned. Otherwise, 0 is returned.
*/
int
is_same_file(const char *file_name1, const char *file_name2)
{
struct stat st1, st2;
if (stat(file_name1, &st1) != 0 || stat(file_name2, &st2) != 0)
return 0;
#ifndef DOS_FILE_PATH
if (st1.st_dev != st2.st_dev || st1.st_ino != st2.st_ino)
return 0;
#else /* DOS_FILE_PATH */
/* Can't rely on st_ino and st_dev, use other fields: */
if (st1.st_mode != st2.st_mode
|| st1.st_uid != st2.st_uid
|| st1.st_gid != st2.st_gid
|| st1.st_size != st2.st_size
|| st1.st_atime != st2.st_atime
|| st1.st_mtime != st2.st_mtime
|| st1.st_ctime != st2.st_ctime)
return 0;
#endif /* DOS_FILE_PATH */
return 1;
}