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https://github.com/coreutils/coreutils.git
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108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/* Determine whether two file names refer to the same file.
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Copyright (C) 1997-2000 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* written by Jim Meyering */
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#if HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <ctype.h>
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#include <errno.h>
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#ifndef errno
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extern int errno;
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#endif
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#if HAVE_STRING_H
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# include <string.h>
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#else
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# include <strings.h>
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#endif
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#include "same.h"
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#include "dirname.h"
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#include "error.h"
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#include "xalloc.h"
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#if ENABLE_NLS
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# include <libintl.h>
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# define _(Text) gettext (Text)
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#else
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# define _(Text) Text
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#endif
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#ifndef HAVE_DECL_FREE
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"this configure-time declaration test was not run"
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#endif
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#if !HAVE_DECL_FREE
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void free ();
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#endif
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#define SAME_INODE(Stat_buf_1, Stat_buf_2) \
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((Stat_buf_1).st_ino == (Stat_buf_2).st_ino \
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&& (Stat_buf_1).st_dev == (Stat_buf_2).st_dev)
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/* Return nonzero if SOURCE and DEST point to the same name in the same
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directory. */
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int
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same_name (const char *source, const char *dest)
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{
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struct stat source_dir_stats;
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struct stat dest_dir_stats;
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char *source_dirname, *dest_dirname;
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char *source_basename, *dest_basename;
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size_t source_baselen, dest_baselen;
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source_dirname = dir_name (source);
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dest_dirname = dir_name (dest);
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if (stat (source_dirname, &source_dir_stats))
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{
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/* Shouldn't happen. */
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error (1, errno, "%s", source_dirname);
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}
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if (stat (dest_dirname, &dest_dir_stats))
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{
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/* Shouldn't happen. */
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error (1, errno, "%s", dest_dirname);
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}
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free (source_dirname);
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free (dest_dirname);
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if (! SAME_INODE (source_dir_stats, dest_dir_stats))
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return 0;
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source_basename = base_name (source);
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dest_basename = base_name (dest);
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source_baselen = base_len (source_basename);
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dest_baselen = base_len (dest_basename);
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return (source_baselen == dest_baselen
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&& memcmp (source_basename, dest_basename, dest_baselen) == 0);
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}
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