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ntfs-3g/libntfs-3g/reparse.c
jpandre 0aab674589 Cosmetic fixes
2008-11-29 10:52:03 +00:00

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/**
* reparse.c - Processing of reparse points
*
* This module is part of ntfs-3g library, but may also be
* integrated in tools running over Linux or Windows
*
* Copyright (c) 2008 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
* 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 NTFS-3G
* distribution in the file COPYING); if not, write to the Free Software
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_SYSMACROS_H
#include <sys/sysmacros.h>
#endif
#include "types.h"
#include "debug.h"
#include "attrib.h"
#include "inode.h"
#include "dir.h"
#include "volume.h"
#include "mft.h"
#include "index.h"
#include "lcnalloc.h"
#include "logging.h"
#include "misc.h"
#include "reparse.h"
/* the definitions in layout.h are wrong, we use names defined in
http://msdn.microsoft.com/en-us/library/aa365740(VS.85).aspx
*/
#define IO_REPARSE_TAG_DFS const_cpu_to_le32(0x8000000A)
#define IO_REPARSE_TAG_DFSR const_cpu_to_le32(0x80000012)
#define IO_REPARSE_TAG_HSM const_cpu_to_le32(0xC0000004)
#define IO_REPARSE_TAG_HSM2 const_cpu_to_le32(0x80000006)
#define IO_REPARSE_TAG_MOUNT_POINT const_cpu_to_le32(0xA0000003)
#define IO_REPARSE_TAG_SIS const_cpu_to_le32(0x80000007)
#define IO_REPARSE_TAG_SYMLINK const_cpu_to_le32(0xA000000C)
struct MOUNT_POINT_REPARSE_DATA { /* reparse data for junctions */
le16 subst_name_offset;
le16 subst_name_length;
le16 print_name_offset;
le16 print_name_length;
char path_buffer[0]; /* above data assume this is char array */
} ;
struct SYMLINK_REPARSE_DATA { /* reparse data for symlinks */
le16 subst_name_offset;
le16 subst_name_length;
le16 print_name_offset;
le16 print_name_length;
le32 flags; /* 1 for full target, otherwise 0 */
char path_buffer[0]; /* above data assume this is char array */
} ;
struct INODE_STACK {
struct INODE_STACK *previous;
struct INODE_STACK *next;
ntfs_inode *ni;
} ;
static const ntfschar dir_junction_head[] = {
const_cpu_to_le16('\\'),
const_cpu_to_le16('?'),
const_cpu_to_le16('?'),
const_cpu_to_le16('\\')
} ;
static const ntfschar vol_junction_head[] = {
const_cpu_to_le16('\\'),
const_cpu_to_le16('?'),
const_cpu_to_le16('?'),
const_cpu_to_le16('\\'),
const_cpu_to_le16('V'),
const_cpu_to_le16('o'),
const_cpu_to_le16('l'),
const_cpu_to_le16('u'),
const_cpu_to_le16('m'),
const_cpu_to_le16('e'),
const_cpu_to_le16('{'),
} ;
static const char mappingdir[] = ".NTFS-3G/";
/*
* Fix a file name with doubtful case in some directory index
* and return the name with the casing used in directory.
*
* Should only be used to translate paths stored with case insensitivity
* (such as directory junctions) when no case conflict is expected.
* If there some ambiguity, the name which collates first is returned.
*
* The name is converted to upper case and searched the usual way.
* The collation rules for file names are such that we should get the
* first candidate if any.
*/
static u64 ntfs_fix_file_name(ntfs_inode *dir_ni, ntfschar *uname,
int uname_len)
{
ntfs_volume *vol = dir_ni->vol;
ntfs_index_context *icx;
u64 mref;
le64 lemref;
int lkup;
int olderrno;
int i;
u32 cpuchar;
FILE_NAME_ATTR *found;
struct {
FILE_NAME_ATTR attr;
ntfschar file_name[NTFS_MAX_NAME_LEN + 1];
} find;
mref = (u64)-1; /* default return (not found) */
icx = ntfs_index_ctx_get(dir_ni, NTFS_INDEX_I30, 4);
if (icx) {
if (uname_len > NTFS_MAX_NAME_LEN)
uname_len = NTFS_MAX_NAME_LEN;
find.attr.file_name_length = uname_len;
for (i=0; i<uname_len; i++) {
cpuchar = le16_to_cpu(uname[i]);
/*
* We need upper or lower value, whichever is smaller,
* here we assume upper is always smaller
*/
if (cpuchar < vol->upcase_len)
find.attr.file_name[i] = vol->upcase[cpuchar];
else
find.attr.file_name[i] = uname[i];
}
olderrno = errno;
lkup = ntfs_index_lookup((char*)&find, uname_len, icx);
if (errno == ENOENT)
errno = olderrno;
/*
* We generally only get the first matching candidate,
* so we still have to check whether this is a real match
*/
if (icx->data && icx->data_len) {
found = (FILE_NAME_ATTR*)icx->data;
if (lkup
&& !ntfs_names_collate(find.attr.file_name,
find.attr.file_name_length,
found->file_name, found->file_name_length,
1, IGNORE_CASE,
vol->upcase, vol->upcase_len))
lkup = 0;
if (!lkup) {
/*
* name found :
* fix original name and return inode
*/
lemref = *(le64*)((char*)found->file_name
- sizeof(INDEX_ENTRY_HEADER)
- sizeof(FILE_NAME_ATTR));
mref = le64_to_cpu(lemref);
for (i=0; i<found->file_name_length; i++)
uname[i] = found->file_name[i];
}
}
ntfs_index_ctx_put(icx);
}
return (mref);
}
/*
* Search for a directory junction or a symbolic link
* along the target path, with target defined as a full absolute path
*
* Returns the path translated to a Linux path
* or NULL if the path is not valid
*/
static char *search_absolute(ntfs_volume *vol, ntfschar *path,
int count, BOOL isdir)
{
ntfs_inode *ni;
u64 inum;
char *target;
int start;
int len;
target = (char*)NULL; /* default return */
ni = ntfs_inode_open(vol, (MFT_REF)FILE_root);
if (ni) {
start = 0;
do {
len = 0;
while (((start + len) < count)
&& (path[start + len] != const_cpu_to_le16('\\')))
len++;
inum = ntfs_fix_file_name(ni, &path[start], len);
ntfs_inode_close(ni);
ni = (ntfs_inode*)NULL;
if (inum != (u64)-1) {
inum = MREF(inum);
ni = ntfs_inode_open(vol, inum);
start += len;
if (start < count)
path[start++] = const_cpu_to_le16('/');
}
} while (ni
&& (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY)
&& (start < count));
if (ni
&& (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY ? isdir : !isdir))
if (ntfs_ucstombs(path, count, &target, 0) < 0) {
if (target) {
free(target);
target = (char*)NULL;
}
}
if (ni)
ntfs_inode_close(ni);
}
return (target);
}
/*
* Stack the next inode in the path
*
* Returns the new top of stack
* or NULL (with stack unchanged) if there is a problem
*/
static struct INODE_STACK *stack_inode(struct INODE_STACK *topni,
ntfschar *name, int len, BOOL fix)
{
struct INODE_STACK *curni;
u64 inum;
if (fix)
inum = ntfs_fix_file_name(topni->ni, name, len);
else
inum = ntfs_inode_lookup_by_name(topni->ni, name, len);
if (inum != (u64)-1) {
inum = MREF(inum);
curni = (struct INODE_STACK*)malloc(sizeof(struct INODE_STACK));
if (curni) {
curni->ni = ntfs_inode_open(topni->ni->vol, inum);
topni->next = curni;
curni->previous = topni;
curni->next = (struct INODE_STACK*)NULL;
}
} else
curni = (struct INODE_STACK*)NULL;
return (curni);
}
/*
* Destack and close the current inode in the path
*
* Returns the new top of stack
* or NULL (with stack unchanged) if there is a problem
*/
static struct INODE_STACK *pop_inode(struct INODE_STACK *topni)
{
struct INODE_STACK *curni;
curni = (struct INODE_STACK*)NULL;
if (topni->previous) {
if (!ntfs_inode_close(topni->ni)) {
curni = topni->previous;
free(topni);
curni->next = (struct INODE_STACK*)NULL;
}
} else {
/* ".." reached the root of fs */
errno = ENOENT;
}
return (curni);
}
/*
* Search for a symbolic link along the target path,
* with the target defined as a relative path
*
* Returns the path translated to a Linux path
* or NULL if the path is not valid
*/
static char *search_relative(ntfs_volume *vol, ntfschar *path, int count,
const char *base, BOOL isdir)
{
struct INODE_STACK *topni;
struct INODE_STACK *curni;
char *target;
ntfschar *unicode;
int unisz;
int start;
int len;
target = (char*)NULL; /* default return */
topni = (struct INODE_STACK*)malloc(sizeof(struct INODE_STACK));
if (topni) {
topni->ni = ntfs_inode_open(vol, FILE_root);
topni->previous = (struct INODE_STACK*)NULL;
topni->next = (struct INODE_STACK*)NULL;
}
if (topni && topni->ni) {
/*
* Process the base path
*/
unicode = (ntfschar*)NULL;
unisz = ntfs_mbstoucs(base, &unicode);
if ((unisz > 0) && unicode) {
start = 1;
do {
len = 0;
while (((start + len) < unisz)
&& (unicode[start + len]
!= const_cpu_to_le16('/')))
len++;
curni = (struct INODE_STACK*)NULL;
if ((start + len) < unisz) {
curni = stack_inode(topni,
&unicode[start], len, FALSE);
if (curni)
topni = curni;
} else
curni = topni;
start += len + 1;
} while (curni
&& topni->ni
&& (topni->ni->mrec->flags
& MFT_RECORD_IS_DIRECTORY)
&& (start < unisz));
free(unicode);
if (curni
&& topni->ni
&& (topni->ni->mrec->flags
& MFT_RECORD_IS_DIRECTORY)) {
start = 0;
do {
len = 0;
while (((start + len) < count)
&& (path[start + len]
!= const_cpu_to_le16('\\')))
len++;
curni = (struct INODE_STACK*)NULL;
if ((path[start]
== const_cpu_to_le16('.'))
&& ((len == 1)
|| ((len == 2)
&& (path[start+1]
== const_cpu_to_le16('.'))))) {
/* leave the .. or . in the path */
curni = topni;
if (len == 2) {
curni = pop_inode(topni);
if (curni)
topni = curni;
}
} else {
curni = stack_inode(topni,
&path[start], len, TRUE);
if (curni)
topni = curni;
}
if (topni->ni) {
start += len;
if (start < count)
path[start++]
= const_cpu_to_le16('/');
}
} while (curni
&& topni->ni
&& (topni->ni->mrec->flags
& MFT_RECORD_IS_DIRECTORY)
&& (start < count));
if (curni
&& topni->ni
&& (topni->ni->mrec->flags
& (MFT_RECORD_IS_DIRECTORY
? isdir : !isdir))) {
if (ntfs_ucstombs(path, count,
&target, 0) < 0) {
if (target) {
free(target);
target = (char*)NULL;
}
}
}
}
}
do {
if (topni->ni)
ntfs_inode_close(topni->ni);
curni = topni;
topni = topni->previous;
free(curni);
} while (topni);
}
return (target);
}
/*
* Check whether a drive letter has been defined in .NTFS-3G
*
* Returns 1 if found,
* 0 if not found,
* -1 if there was an error (described by errno)
*/
static int ntfs_drive_letter(ntfs_volume *vol, ntfschar letter)
{
char defines[NTFS_MAX_NAME_LEN + 5];
char *drive;
int ret;
int sz;
int olderrno;
ntfs_inode *ni;
ret = -1;
drive = (char*)NULL;
sz = ntfs_ucstombs(&letter, 1, &drive, 0);
if (sz > 0) {
strcpy(defines,mappingdir);
if ((*drive >= 'a') && (*drive <= 'z'))
*drive += 'A' - 'a';
strcat(defines,drive);
strcat(defines,":");
olderrno = errno;
ni = ntfs_pathname_to_inode(vol, NULL, defines);
if (ni && !ntfs_inode_close(ni))
ret = 1;
else
if (errno == ENOENT) {
ret = 0;
/* avoid errno pollution */
errno = olderrno;
}
}
if (drive)
free(drive);
return (ret);
}
/*
* Check and translate the target of a junction point or
* a full absolute symbolic link.
*
* A full target definition begins with "\??\" or "\\?\"
*
* The fully defined target is redefined as a relative link,
* - either to the target if found on the same device.
* - or into the /.NTFS-3G directory for the user to define
* In the first situation, the target is translated to case-sensitive path.
*
* returns the target converted to a relative symlink
* or NULL if there were some problem, as described by errno
*/
static char *ntfs_get_fulllink(ntfs_volume *vol, ntfschar *junction,
int count, const char *path, BOOL isdir)
{
char *target;
char *fulltarget;
int i;
int sz;
int level;
const char *p;
char *q;
enum { DIR_JUNCTION, VOL_JUNCTION, NO_JUNCTION } kind;
target = (char*)NULL;
fulltarget = (char*)NULL;
/*
* For a valid directory junction we want \??\x:\
* where \ is an individual char and x a non-null char
*/
if ((count >= 7)
&& !memcmp(junction,dir_junction_head,8)
&& junction[4]
&& (junction[5] == const_cpu_to_le16(':'))
&& (junction[6] == const_cpu_to_le16('\\')))
kind = DIR_JUNCTION;
else
/*
* For a valid volume junction we want \\?\Volume{
* and a final \ (where \ is an individual char)
*/
if ((count >= 12)
&& !memcmp(junction,vol_junction_head,22)
&& (junction[count-1] == const_cpu_to_le16('\\')))
kind = VOL_JUNCTION;
else
kind = NO_JUNCTION;
/*
* Directory junction with an explicit path and
* no specific definition for the drive letter :
* try to interpret as a target on the same volume
*/
if ((kind == DIR_JUNCTION)
&& (count >= 7)
&& junction[7]
&& !ntfs_drive_letter(vol, junction[4])) {
target = search_absolute(vol,&junction[7],count - 7, isdir);
if (target) {
level = 0;
for (p=path; *p; p++)
if (*p == '/')
level++;
fulltarget = (char*)ntfs_malloc(3*level
+ strlen(target) + 1);
if (fulltarget) {
fulltarget[0] = 0;
if (level > 1) {
for (i=1; i<level; i++)
strcat(fulltarget,"../");
} else
strcpy(fulltarget,"./");
strcat(fulltarget,target);
}
free(target);
}
}
/*
* Volume junctions or directory junctions with
* target not found on current volume :
* link to /.NTFS-3G/target which the user can
* define as a symbolic link to the real target
*/
if (((kind == DIR_JUNCTION) && !fulltarget)
|| (kind == VOL_JUNCTION)) {
sz = ntfs_ucstombs(&junction[4],
(kind == VOL_JUNCTION ? count - 5 : count - 4),
&target, 0);
if ((sz > 0) && target) {
/* reverse slashes */
for (q=target; *q; q++)
if (*q == '\\')
*q = '/';
/* force uppercase drive letter */
if ((target[1] == ':')
&& (target[0] >= 'a')
&& (target[0] <= 'z'))
target[0] += 'A' - 'a';
level = 0;
for (p=path; *p; p++)
if (*p == '/')
level++;
fulltarget = (char*)ntfs_malloc(3*level
+ sizeof(mappingdir) + count - 4);
if (fulltarget) {
fulltarget[0] = 0;
if (level > 1) {
for (i=1; i<level; i++)
strcat(fulltarget,"../");
} else
strcpy(fulltarget,"./");
strcat(fulltarget,mappingdir);
strcat(fulltarget,target);
}
}
if (target)
free(target);
}
return (fulltarget);
}
/*
* Check and translate the target of an absolute symbolic link.
*
* An absolute target definition begins with "\" or "x:\"
*
* The absolute target is redefined as a relative link,
* - either to the target if found on the same device.
* - or into the /.NTFS-3G directory for the user to define
* In the first situation, the target is translated to case-sensitive path.
*
* returns the target converted to a relative symlink
* or NULL if there were some problem, as described by errno
*/
static char *ntfs_get_abslink(ntfs_volume *vol, ntfschar *junction,
int count, const char *path, BOOL isdir)
{
char *target;
char *fulltarget;
int i;
int sz;
int level;
const char *p;
char *q;
enum { FULL_PATH, ABS_PATH, REJECTED_PATH } kind;
target = (char*)NULL;
fulltarget = (char*)NULL;
/*
* For a full valid path we want x:\
* where \ is an individual char and x a non-null char
*/
if ((count >= 3)
&& junction[0]
&& (junction[1] == const_cpu_to_le16(':'))
&& (junction[2] == const_cpu_to_le16('\\')))
kind = FULL_PATH;
else
/*
* For an absolute path we want an initial \
*/
if ((count >= 0)
&& (junction[0] == const_cpu_to_le16('\\')))
kind = ABS_PATH;
else
kind = REJECTED_PATH;
/*
* Full path, with a drive letter and
* no specific definition for the drive letter :
* try to interpret as a target on the same volume.
* Do the same for an abs path with no drive letter.
*/
if (((kind == FULL_PATH)
&& (count >= 3)
&& junction[3]
&& !ntfs_drive_letter(vol, junction[0]))
|| (kind == ABS_PATH)) {
if (kind == ABS_PATH)
target = search_absolute(vol, &junction[1],
count - 1, isdir);
else
target = search_absolute(vol, &junction[3],
count - 3, isdir);
if (target) {
level = 0;
for (p=path; *p; p++)
if (*p == '/')
level++;
fulltarget = (char*)ntfs_malloc(3*level
+ strlen(target) + 1);
if (fulltarget) {
fulltarget[0] = 0;
if (level > 1) {
for (i=1; i<level; i++)
strcat(fulltarget,"../");
} else
strcpy(fulltarget,"./");
strcat(fulltarget,target);
}
free(target);
}
}
/*
* full path with target not found on current volume :
* link to /.NTFS-3G/target which the user can
* define as a symbolic link to the real target
*/
if ((kind == FULL_PATH) && !fulltarget) {
sz = ntfs_ucstombs(&junction[0],
count,&target, 0);
if ((sz > 0) && target) {
/* reverse slashes */
for (q=target; *q; q++)
if (*q == '\\')
*q = '/';
/* force uppercase drive letter */
if ((target[1] == ':')
&& (target[0] >= 'a')
&& (target[0] <= 'z'))
target[0] += 'A' - 'a';
level = 0;
for (p=path; *p; p++)
if (*p == '/')
level++;
fulltarget = (char*)ntfs_malloc(3*level
+ sizeof(mappingdir) + count - 4);
if (fulltarget) {
fulltarget[0] = 0;
if (level > 1) {
for (i=1; i<level; i++)
strcat(fulltarget,"../");
} else
strcpy(fulltarget,"./");
strcat(fulltarget,mappingdir);
strcat(fulltarget,target);
}
}
if (target)
free(target);
}
return (fulltarget);
}
/*
* Check and translate the target of a relative symbolic link.
*
* A relative target definition does not begin with "\"
*
* The original definition of relative target is kept, it is just
* translated to a case-sensitive path.
*
* returns the target converted to a relative symlink
* or NULL if there were some problem, as described by errno
*/
static char *ntfs_get_rellink(ntfs_volume *vol, ntfschar *junction,
int count, const char *path, BOOL isdir)
{
char *target;
target = search_relative(vol,junction,count,path,isdir);
return (target);
}
/*
* Get the target for a junction point or symbolic link
* Should only be called for files or directories with reparse data
*
* returns the target converted to a relative path, or NULL
* if some error occurred, as described by errno
* errno is EOPNOTSUPP if the reparse point is not a valid
* symbolic link or directory junction
*/
char *ntfs_make_symlink(const char *org_path,
ntfs_inode *ni, int *pattr_size)
{
s64 attr_size = 0;
char *target;
unsigned int offs;
unsigned int lth;
ntfs_volume *vol;
REPARSE_POINT *reparse_attr;
struct MOUNT_POINT_REPARSE_DATA *mount_point_data;
struct SYMLINK_REPARSE_DATA *symlink_data;
enum { FULL_TARGET, ABS_TARGET, REL_TARGET } kind;
ntfschar *p;
BOOL bad;
BOOL isdir;
target = (char*)NULL;
bad = TRUE;
isdir = (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY)
!= const_cpu_to_le16(0);
vol = ni->vol;
reparse_attr = (REPARSE_POINT*)ntfs_attr_readall(ni,
AT_REPARSE_POINT,(ntfschar*)NULL, 0, &attr_size);
if (reparse_attr && attr_size) {
switch (reparse_attr->reparse_tag) {
case IO_REPARSE_TAG_MOUNT_POINT :
mount_point_data = (struct MOUNT_POINT_REPARSE_DATA*)
reparse_attr->reparse_data;
offs = le16_to_cpu(mount_point_data->subst_name_offset);
lth = le16_to_cpu(mount_point_data->subst_name_length);
/* consistency checks */
if (isdir
&& ((le16_to_cpu(reparse_attr->reparse_data_length)
+ 8) == attr_size)
&& ((int)((sizeof(REPARSE_POINT)
+ sizeof(struct MOUNT_POINT_REPARSE_DATA)
+ offs + lth)) <= attr_size)) {
target = ntfs_get_fulllink(vol,
(ntfschar*)&mount_point_data->path_buffer[offs],
lth/2, org_path, isdir);
if (target)
bad = FALSE;
}
break;
case IO_REPARSE_TAG_SYMLINK :
symlink_data = (struct SYMLINK_REPARSE_DATA*)
reparse_attr->reparse_data;
offs = le16_to_cpu(symlink_data->subst_name_offset);
lth = le16_to_cpu(symlink_data->subst_name_length);
p = (ntfschar*)&symlink_data->path_buffer[offs];
/*
* Predetermine the kind of target,
* the called function has to make a full check
*/
if (*p++ == const_cpu_to_le16('\\')) {
if ((*p == const_cpu_to_le16('?'))
|| (*p == const_cpu_to_le16('\\')))
kind = FULL_TARGET;
else
kind = ABS_TARGET;
} else
if (*p == const_cpu_to_le16(':'))
kind = ABS_TARGET;
else
kind = REL_TARGET;
p--;
/* consistency checks */
if (((le16_to_cpu(reparse_attr->reparse_data_length)
+ 8) == attr_size)
&& ((int)((sizeof(REPARSE_POINT)
+ sizeof(struct SYMLINK_REPARSE_DATA)
+ offs + lth)) <= attr_size)) {
switch (kind) {
case FULL_TARGET :
if (!(symlink_data->flags
& const_cpu_to_le32(1))) {
target = ntfs_get_fulllink(vol,
p, lth/2,
org_path, isdir);
if (target)
bad = FALSE;
}
break;
case ABS_TARGET :
if (symlink_data->flags
& const_cpu_to_le32(1)) {
target = ntfs_get_abslink(vol,
p, lth/2,
org_path, isdir);
if (target)
bad = FALSE;
}
break;
case REL_TARGET :
if (symlink_data->flags
& const_cpu_to_le32(1)) {
target = ntfs_get_rellink(vol,
p, lth/2,
org_path, isdir);
if (target)
bad = FALSE;
}
break;
}
}
break;
}
free(reparse_attr);
}
*pattr_size = attr_size;
if (bad)
errno = EOPNOTSUPP;
return (target);
}
/*
* Check whether a reparse point looks like a junction point
* or a symbolic link.
* Should only be called for files or directories with reparse data
*
* The validity of the target is not checked.
*/
BOOL ntfs_possible_symlink(ntfs_inode *ni)
{
s64 attr_size = 0;
REPARSE_POINT *reparse_attr;
BOOL possible;
possible = FALSE;
reparse_attr = (REPARSE_POINT*)ntfs_attr_readall(ni,
AT_REPARSE_POINT,(ntfschar*)NULL, 0, &attr_size);
if (reparse_attr && attr_size) {
switch (reparse_attr->reparse_tag) {
case IO_REPARSE_TAG_MOUNT_POINT :
case IO_REPARSE_TAG_SYMLINK :
possible = TRUE;
default : ;
}
free(reparse_attr);
}
return (possible);
}
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