opengnsys
/
ntfs-3g
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Processed an alternate format for Windows symlinks

N2009_11_14_FIXES
jpandre 2008-11-13 09:40:42 +00:00
parent 751483b465
commit e39b2a5d0d
1 changed files with 41 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
libntfs-3g/reparse.c
View File

@ -56,14 +56,14 @@
#include "misc.h"
#include "reparse.h"
/* the definition in layout.h is wrong.
source : http://www.opensource.apple.com/darwinsource/WWDC2004/tcl-14/tcl/win/tclWinFile.c
/* the definitions in layout.h are wrong, we use names defined in
http://msdn.microsoft.com/en-us/library/aa365740(VS.85).aspx
*/
#undef IO_REPARSE_TAG_MOUNT_POINT
#define IO_REPARSE_TAG_MOUNT_POINT 0xA0000003
#define IO_REPARSE_TAG_MOUNT_POINT const_cpu_to_le32(0xA0000003)
#define IO_REPARSE_TAG_SYMLINK const_cpu_to_le32(0xA000000C)
struct SYMLNK_REPARSE_DATA {
struct MOUNT_POINT_REPARSE_DATA {
u16 subst_name_offset;
u16 subst_name_length;
u16 print_name_offset;
@ -71,6 +71,15 @@ struct SYMLNK_REPARSE_DATA {
char path_buffer[0]; /* above data assume this is char array */
} ;
struct SYMLINK_REPARSE_DATA { /* another format */
u16 subst_name_offset;
u16 subst_name_length;
u16 print_name_offset;
u16 print_name_length;
u32 unknown;
char path_buffer[0]; /* above data assume this is char array */
} ;
static const ntfschar dir_junction_head[] = {
const_cpu_to_le16('\\'),
const_cpu_to_le16('?'),
@ -393,7 +402,8 @@ char *ntfs_junction_point(ntfs_volume *vol, const char *org_path,
unsigned int offs;
unsigned int lth;
REPARSE_POINT *reparse_attr;
struct SYMLNK_REPARSE_DATA *path_data;
struct MOUNT_POINT_REPARSE_DATA *mount_point_data;
struct SYMLINK_REPARSE_DATA *symlink_data;
BOOL bad;
target = (char*)NULL;
@ -401,27 +411,41 @@ char *ntfs_junction_point(ntfs_volume *vol, const char *org_path,
reparse_attr = (REPARSE_POINT*)ntfs_attr_readall(ni,
AT_REPARSE_POINT,(ntfschar*)NULL, 0, &attr_size);
if (reparse_attr && attr_size) {
/*
* reparse_tag 0xa000000c has been found for
* \Users\All Users
* (not supported until properly understood)
*/
if (reparse_attr->reparse_tag == IO_REPARSE_TAG_MOUNT_POINT) {
path_data = (struct SYMLNK_REPARSE_DATA*)reparse_attr->reparse_data;
offs = le16_to_cpu(path_data->subst_name_offset);
lth = le16_to_cpu(path_data->subst_name_length);
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 (((le16_to_cpu(reparse_attr->reparse_data_length)
+ 8) == attr_size)
&& ((int)((sizeof(REPARSE_POINT)
+ sizeof(struct SYMLNK_REPARSE_DATA)
+ sizeof(struct MOUNT_POINT_REPARSE_DATA)
+ offs + lth)) <= attr_size)) {
target = ntfs_get_junction(vol,
(ntfschar*)&path_data->path_buffer[offs],
(ntfschar*)&mount_point_data->path_buffer[offs],
lth/2, org_path);
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);
/* 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)) {
target = ntfs_get_junction(vol,
(ntfschar*)&symlink_data->path_buffer[offs],
lth/2, org_path);
if (target)
bad = FALSE;
}
break;
}
free(reparse_attr);
}