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Processed junctions and symlinks whose target references another one

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When the target of a junction or a Windows-type symlink references another
junction or symlink, the search for the full path on the current partition
and its translation for case-sensitive access is interrupted. The target can
now be dereferenced, provided the end of the path needed no translation.
This commit is contained in:
Jean-Pierre André 2012-07-06 09:48:05 +02:00
parent ab6f7c027d
commit db5af00af6
1 changed files with 36 additions and 4 deletions
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40
libntfs-3g/reparse.c
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@ -3,7 +3,7 @@
*
* This module is part of ntfs-3g library
*
* Copyright (c) 2008-2009 Jean-Pierre Andre
* Copyright (c) 2008-2012 Jean-Pierre Andre
*
* 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
@ -236,6 +236,17 @@ static char *search_absolute(ntfs_volume *vol, ntfschar *path,
ni = ntfs_inode_open(vol, (MFT_REF)FILE_root);
if (ni) {
start = 0;
/*
* Examine and translate the path, until we reach either
* - the end,
* - an unknown item
* - a non-directory
* - another reparse point,
* A reparse point is not dereferenced, it will be
* examined later when the translated path is dereferenced,
* however the final part of the path will not be adjusted
* to correct case.
*/
do {
len = 0;
while (((start + len) < count)
@ -253,9 +264,11 @@ static char *search_absolute(ntfs_volume *vol, ntfschar *path,
}
} while (ni
&& (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY)
&& !(ni->flags & FILE_ATTR_REPARSE_POINT)
&& (start < count));
if (ni
&& (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY ? isdir : !isdir))
&& ((ni->mrec->flags & MFT_RECORD_IS_DIRECTORY ? isdir : !isdir)
|| (ni->flags & FILE_ATTR_REPARSE_POINT)))
if (ntfs_ucstombs(path, count, &target, 0) < 0) {
if (target) {
free(target);
@ -289,12 +302,25 @@ static char *search_relative(ntfs_inode *ni, ntfschar *path, int count)
int pos;
int lth;
BOOL ok;
BOOL morelinks;
int max = 32; /* safety */
pos = 0;
ok = TRUE;
morelinks = FALSE;
curni = ntfs_dir_parent_inode(ni);
while (curni && ok && (pos < (count - 1)) && --max) {
/*
* Examine and translate the path, until we reach either
* - the end,
* - an unknown item
* - a non-directory
* - another reparse point,
* A reparse point is not dereferenced, it will be
* examined later when the translated path is dereferenced,
* however the final part of the path will not be adjusted
* to correct case.
*/
while (curni && ok && !morelinks && (pos < (count - 1)) && --max) {
if ((count >= (pos + 2))
&& (path[pos] == const_cpu_to_le16('.'))
&& (path[pos+1] == const_cpu_to_le16('\\'))) {
@ -332,12 +358,18 @@ static char *search_relative(ntfs_inode *ni, ntfschar *path, int count)
if (!curni)
ok = FALSE;
else {
if (curni->flags & FILE_ATTR_REPARSE_POINT)
morelinks = TRUE;
if (ok && ((pos + lth) < count)) {
path[pos + lth] = const_cpu_to_le16('/');
pos += lth + 1;
if (morelinks
&& ntfs_inode_close(curni))
ok = FALSE;
} else {
pos += lth;
if ((ni->mrec->flags ^ curni->mrec->flags)
if (!morelinks
&& (ni->mrec->flags ^ curni->mrec->flags)
& MFT_RECORD_IS_DIRECTORY)
ok = FALSE;
if (ntfs_inode_close(curni))