* cygpath.cc (get_device_name): Prefer the \\.\X: DOS device for

[pf3gnuchains/pf3gnuchains4x.git] / winsup / utils / cygpath.cc

diff --git a/winsup/utils/cygpath.cc b/winsup/utils/cygpath.cc
index 2ba727a..449c543 100644 (file)
--- a/winsup/utils/cygpath.cc
+++ b/winsup/utils/cygpath.cc
@@ -233,8 +233,18 @@ get_device_name (char *path)
              ans.MaximumLength = len;
              ans.Buffer = ret + 4;
              RtlUnicodeStringToAnsiString (&ans, &odi->ObjectName, FALSE);
-             ZwClose (dir);
-             goto out;
+             /* Special case for local disks:  It's most feasible if the
+                DOS device name reflects the DOS drive, so we check for this
+                explicitly and only return prematurely if so. */
+#define              HARDDISK_PREFIX   L"\\Device\\Harddisk"
+             if (ntdev.Length < wcslen (HARDDISK_PREFIX)
+                 || wcsncasecmp (ntdev.Buffer, HARDDISK_PREFIX, 8) != 0
+                 || (odi->ObjectName.Length == 2 * sizeof (WCHAR)
+                     && odi->ObjectName.Buffer[1] == L':'))
+               {
+                 ZwClose (dir);
+                 goto out;
+               }
            }
        }
       ZwClose (dir);