diff options
Diffstat (limited to 'lib/same.c')
-rw-r--r-- | lib/same.c | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/lib/same.c b/lib/same.c deleted file mode 100644 index e267ba444..000000000 --- a/lib/same.c +++ /dev/null @@ -1,128 +0,0 @@ -/* Determine whether two file names refer to the same file. - - Copyright (C) 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ - -/* written by Jim Meyering */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -#include <stdbool.h> -#include <stdio.h> -#include <unistd.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <ctype.h> -#include <errno.h> - -#include <string.h> - -#include <limits.h> -#ifndef _POSIX_NAME_MAX -# define _POSIX_NAME_MAX 14 -#endif - -#include "same.h" -#include "dirname.h" -#include "error.h" -#include "same-inode.h" -#include "xalloc.h" - -#ifndef MIN -# define MIN(a, b) ((a) < (b) ? (a) : (b)) -#endif - -/* Return nonzero if SOURCE and DEST point to the same name in the same - directory. */ - -bool -same_name (const char *source, const char *dest) -{ - /* Compare the basenames. */ - char const *source_basename = last_component (source); - char const *dest_basename = last_component (dest); - size_t source_baselen = base_len (source_basename); - size_t dest_baselen = base_len (dest_basename); - bool identical_basenames = - (source_baselen == dest_baselen - && memcmp (source_basename, dest_basename, dest_baselen) == 0); - bool compare_dirs = identical_basenames; - bool same = false; - -#if ! _POSIX_NO_TRUNC && HAVE_PATHCONF && defined _PC_NAME_MAX - /* This implementation silently truncates components of file names. If - the base names might be truncated, check whether the truncated - base names are the same, while checking the directories. */ - size_t slen_max = HAVE_LONG_FILE_NAMES ? 255 : _POSIX_NAME_MAX; - size_t min_baselen = MIN (source_baselen, dest_baselen); - if (slen_max <= min_baselen - && memcmp (source_basename, dest_basename, slen_max) == 0) - compare_dirs = true; -#endif - - if (compare_dirs) - { - 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); - } - - same = SAME_INODE (source_dir_stats, dest_dir_stats); - -#if ! _POSIX_NO_TRUNC && HAVE_PATHCONF && defined _PC_NAME_MAX - if (same && ! identical_basenames) - { - long name_max = (errno = 0, pathconf (dest_dirname, _PC_NAME_MAX)); - if (name_max < 0) - { - if (errno) - { - /* Shouldn't happen. */ - error (1, errno, "%s", dest_dirname); - } - same = false; - } - else - same = (name_max <= min_baselen - && memcmp (source_basename, dest_basename, name_max) == 0); - } -#endif - - free (source_dirname); - free (dest_dirname); - } - - return same; -} |