|
From: Anton A. <an...@us...> - 2002-06-06 15:41:33
|
Changes by: antona
Update of /cvsroot/linux-ntfs/linux-ntfs/libntfs
In directory usw-pr-cvs1:/tmp/cvs-serv11490/libntfs
Added Files:
dir.c
Log Message:
Add template files for directory handling code.
--- NEW FILE ---
/*
* $Id: dir.c,v 1.1 2002/06/06 15:41:30 antona Exp $
*
* dir.c - Directory handling code. Part of the Linux-NTFS project.
*
* Copyright (c) 2002 Anton Altaparmakov.
*
* This program/include file 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 of the License, or
* (at your option) any later version.
*
* This program/include file 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 (in the main directory of the Linux-NTFS
* distribution in the file COPYING); if not, write to the Free Software
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <errno.h>
#include "types.h"
#include "debug.h"
#include "attrib.h"
#include "inode.h"
#include "dir.h"
/**
* The little endian Unicode string $I30 as a global constant.
*/
const uchar_t I30[5] = { const_cpu_to_le16('$'), const_cpu_to_le16('I'),
const_cpu_to_le16('3'), const_cpu_to_le16('0'),
const_cpu_to_le16(0) };
/**
* ntfs_lookup_inode_by_name - find an inode in a directory given its name
* @dir_ni: ntfs inode of the directory in which to search for the name
* @uname: Unicode name for which to search in the directory
* @uname_len: length of the name @uname in Unicode characters
* @res: return the found file name if necessary (see below)
*
* Look for an inode with name @uname in the directory with inode @dir_ni.
* ntfs_lookup_inode_by_name() walks the contents of the directory looking for
* the Unicode name. If the name is found in the directory, the corresponding
* inode number (>= 0) is returned as a mft reference in cpu format, i.e. it
* is a 64-bit number containing the sequence number.
*
* On error, a negative value is returned corresponding to the error code. In
* particular if the inode is not found -ENOENT is returned. Note that you
* can't just check the return value for being negative, you have to check the
* inode number for being negative which you can extract using MREC(return
* value).
*
* Note, @uname_len does not include the (optional) terminating NULL character.
*
* Note, we look for a case sensitive match first but we also look for a case
* insensitive match at the same time. If we find a case insensitive match, we
* save that for the case that we don't find an exact match, where we return
* the case insensitive match and setup @res (which we allocate!) with the mft
* reference, the file name type, length and with a copy of the little endian
* Unicode file name itself. If we match a file name which is in the DOS name
* space, we only return the mft reference and file name type in @res.
* ntfs_lookup() then uses this to find the long file name in the inode itself.
* This is to avoid polluting the dcache with short file names. We want them to
* work but we don't care for how quickly one can access them. This also fixes
* the dcache aliasing issues.
*/
u64 ntfs_lookup_inode_by_name(ntfs_inode *dir_ni, const uchar_t *uname,
const int uname_len)
{
}
|
