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* fhandler_disk_file.cc (is_volume_mountpoint): Align check with

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symlink_info::check_reparse_point().
	* path.cc (symlink_info::check_reparse_point): Rearrange slightly.
	Add code path for unrecognized repare point types.  Add comment.
This commit is contained in:
Corinna Vinschen
2009-11-10 08:54:24 +00:00
parent 6e22c002ff
commit 3aec0f00b1
3 changed files with 31 additions and 15 deletions
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7
winsup/cygwin/ChangeLog
View File

@@ -1,3 +1,10 @@
2009-11-10 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (is_volume_mountpoint): Align check with
symlink_info::check_reparse_point().
* path.cc (symlink_info::check_reparse_point): Rearrange slightly.
Add code path for unrecognized repare point types. Add comment.
2009-11-09 Corinna Vinschen <corinna@vinschen.de>
* path.cc (symlink_info::check_reparse_point): Always check

7
winsup/cygwin/fhandler_disk_file.cc
View File

@@ -154,6 +154,7 @@ is_volume_mountpoint (POBJECT_ATTRIBUTES attr)
bool ret = false;
IO_STATUS_BLOCK io;
HANDLE reph;
UNICODE_STRING subst;
if (NT_SUCCESS (NtOpenFile (&reph, READ_CONTROL, attr, &io,
FILE_SHARE_VALID_FLAGS,
@@ -166,7 +167,11 @@ is_volume_mountpoint (POBJECT_ATTRIBUTES attr)
&io, FSCTL_GET_REPARSE_POINT, NULL, 0,
(LPVOID) rp, MAXIMUM_REPARSE_DATA_BUFFER_SIZE))
&& rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT
&& rp->SymbolicLinkReparseBuffer.PrintNameLength == 0)
&& (RtlInitCountedUnicodeString (&subst,
(WCHAR *)((char *)rp->MountPointReparseBuffer.PathBuffer
+ rp->MountPointReparseBuffer.SubstituteNameOffset),
rp->MountPointReparseBuffer.SubstituteNameLength),
RtlEqualUnicodePathPrefix (&subst, &ro_u_volume, TRUE)))
ret = true;
NtClose (reph);
}

32
winsup/cygwin/path.cc
View File

@@ -1844,6 +1844,7 @@ symlink_info::check_reparse_point (HANDLE h)
NTSTATUS status;
IO_STATUS_BLOCK io;
PREPARSE_DATA_BUFFER rp = (PREPARSE_DATA_BUFFER) tp.c_get ();
UNICODE_STRING subst;
char srcbuf[SYMLINK_MAX + 7];
status = NtFsControlFile (h, NULL, NULL, NULL, &io, FSCTL_GET_REPARSE_POINT,
@@ -1857,18 +1858,12 @@ symlink_info::check_reparse_point (HANDLE h)
return 0;
}
if (rp->ReparseTag == IO_REPARSE_TAG_SYMLINK)
{
sys_wcstombs (srcbuf, SYMLINK_MAX + 1,
(WCHAR *)((char *)rp->SymbolicLinkReparseBuffer.PathBuffer
+ rp->SymbolicLinkReparseBuffer.SubstituteNameOffset),
rp->SymbolicLinkReparseBuffer.SubstituteNameLength / sizeof (WCHAR));
pflags = PATH_SYMLINK | PATH_REP;
fileattr &= ~FILE_ATTRIBUTE_DIRECTORY;
}
RtlInitCountedUnicodeString (&subst,
(WCHAR *)((char *)rp->SymbolicLinkReparseBuffer.PathBuffer
+ rp->SymbolicLinkReparseBuffer.SubstituteNameOffset),
rp->SymbolicLinkReparseBuffer.SubstituteNameLength);
else if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT)
{
UNICODE_STRING subst;
RtlInitCountedUnicodeString (&subst,
(WCHAR *)((char *)rp->MountPointReparseBuffer.PathBuffer
+ rp->MountPointReparseBuffer.SubstituteNameOffset),
@@ -1880,11 +1875,20 @@ symlink_info::check_reparse_point (HANDLE h)
volume mount point. */
return -1;
}
sys_wcstombs (srcbuf, SYMLINK_MAX + 1, subst.Buffer,
subst.Length / sizeof (WCHAR));
pflags = PATH_SYMLINK | PATH_REP;
fileattr &= ~FILE_ATTRIBUTE_DIRECTORY;
}
else
{
/* Maybe it's a reparse point, but it's certainly not one we
recognize. Drop the REPARSE file attribute so we don't even
try to use the flag for some special handling. It's just some
arbitrary file or directory for us. */
fileattr &= ~FILE_ATTRIBUTE_REPARSE_POINT;
return 0;
}
sys_wcstombs (srcbuf, SYMLINK_MAX + 7, subst.Buffer,
subst.Length / sizeof (WCHAR));
pflags = PATH_SYMLINK | PATH_REP;
fileattr &= ~FILE_ATTRIBUTE_DIRECTORY;
return posixify (srcbuf);
}