- The last change in path.cc introduced a bug that causes an error
when accessing a virtual drive which mounts UNC path such as
"\\server\share\dir" rather than "\\server\share". This patch
fixes the issue.
---
winsup/cygwin/path.cc | 50 +++++++++++++++++++++++++------------------
1 file changed, 29 insertions(+), 21 deletions(-)
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index eb1255849..6682d2a58 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -3507,29 +3507,37 @@ restart:
if (RtlEqualUnicodePathPrefix (&fpath, &ro_u_uncp, TRUE)
&& !RtlEqualUnicodePathPrefix (&upath, &ro_u_uncp, TRUE))
{
- /* ...get the remote path from the volume path name,
- replace remote path with drive letter, check again. */
+ /* ...get the remote path, replace remote path
+ with drive letter, check again. */
+ WCHAR drive[3] =
+ {(WCHAR) towupper (upath.Buffer[4]), L':', L'\0'};
WCHAR remote[MAX_PATH];
- fpbuf[1] = L'\\';
- BOOL r = GetVolumePathNameW (fpbuf, remote, MAX_PATH);
- fpbuf[1] = L'?';
- if (r)
- {
- int remlen = wcslen (remote);
- if (remote[remlen - 1] == L'\\')
- remlen--;
- /* Hackfest */
- fpath.Buffer[4] = upath.Buffer[4]; /* Drive letter */
- fpath.Buffer[5] = L':';
- WCHAR *to = fpath.Buffer + 6;
- WCHAR *from = to + remlen - 6;
- memmove (to, from,
- (wcslen (from) + 1) * sizeof (WCHAR));
- fpath.Length -= (from - to) * sizeof (WCHAR);
- if (RtlEqualUnicodeString (&upath, &fpath, !!ci_flag))
- goto file_not_symlink;
- }
+ if (!QueryDosDeviceW (drive, remote, MAX_PATH))
+ goto file_not_symlink; /* fallback */
+
+ int remlen = wcslen (remote);
+ if (remote[remlen - 1] == L'\\')
+ remlen--;
+ WCHAR *p;
+ if (wcsstr (remote, L"\\??\\UNC\\") == remote)
+ remlen -= 6;
+ else if ((p = wcschr (remote, L';') + 1)
+ && wcsstr (p, drive) == p
+ && (p = wcschr (p + 2, L'\\')))
+ remlen -= p - remote - 1;
+ else
+ goto file_not_symlink; /* fallback */
+ /* Hackfest */
+ fpath.Buffer[4] = drive[0]; /* Drive letter */
+ fpath.Buffer[5] = L':';
+ WCHAR *to = fpath.Buffer + 6;
+ WCHAR *from = to + remlen;
+ memmove (to, from,
+ (wcslen (from) + 1) * sizeof (WCHAR));
+ fpath.Length -= (from - to) * sizeof (WCHAR);
+ if (RtlEqualUnicodeString (&upath, &fpath, !!ci_flag))
+ goto file_not_symlink;
}
issymlink = true;
/* upath.Buffer is big enough and unused from this point on.
--
2.34.1
