+
−/* Determine whether two file names refer to the same file.
+
−   Copyright (C) 1997-2000, 2002-2003 Free Software Foundation, Inc.
+
−
+
−   This program 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.
+
−
+
−   This program 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; if not, write to the Free Software Foundation,
+
−   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
−
+
−/* written by Jim Meyering */
+
−
+
−#if HAVE_CONFIG_H
+
−# include <config.h>
+
−#endif
+
−
+
−#include <stdio.h>
+
−#ifdef HAVE_UNISTD_H
+
−# include <unistd.h>
+
−#endif
+
−#include <stdlib.h>
+
−#include <sys/types.h>
+
−#include <sys/stat.h>
+
−#include <ctype.h>
+
−#include <errno.h>
+
−#ifndef errno
+
−extern int errno;
+
−#endif
+
−
+
−#include <string.h>
+
−
+
−#include "same.h"
+
−#include "dirname.h"
+
−#include "error.h"
+
−#include "xalloc.h"
+
−
+
−#define SAME_INODE(Stat_buf_1, Stat_buf_2) \
+
−  ((Stat_buf_1).st_ino == (Stat_buf_2).st_ino \
+
−   && (Stat_buf_1).st_dev == (Stat_buf_2).st_dev)
+
−
+
−/* Return nonzero if SOURCE and DEST point to the same name in the same
+
−   directory.  */
+
−
+
−int
+
−same_name (const char *source, const char *dest)
+
−{
+
−  /* Compare the basenames.  */
+
−  char const *source_basename = base_name (source);
+
−  char const *dest_basename = base_name (dest);
+
−  size_t source_baselen = base_len (source_basename);
+
−  size_t dest_baselen = base_len (dest_basename);
+
−
+
−  if (source_baselen == dest_baselen
+
−      && memcmp (source_basename, dest_basename, dest_baselen) == 0)
+
−    {
+
−      struct stat source_dir_stats;
+
−      struct stat dest_dir_stats;
+
−      char *source_dirname, *dest_dirname;
+
−
+
−      /* Compare the parent directories (via the device and inode numbers).  */
+
−      source_dirname = dir_name (source);
+
−      dest_dirname = dir_name (dest);
+
−
+
−      if (stat (source_dirname, &source_dir_stats))
+
−	{
+
−	  /* Shouldn't happen.  */
+
−	  error (1, errno, "%s", source_dirname);
+
−	}
+
−
+
−      if (stat (dest_dirname, &dest_dir_stats))
+
−	{
+
−	  /* Shouldn't happen.  */
+
−	  error (1, errno, "%s", dest_dirname);
+
−	}
+
−
+
−      free (source_dirname);
+
−      free (dest_dirname);
+
−
+
−      if (SAME_INODE (source_dir_stats, dest_dir_stats))
+
−	return 1;
+
−    }
+
−
+
−  return 0;
+
−}