Re: [Patch]: NUL and other special names

[David Fritz]

I don't how much you want to rely on undocumented features, but ntdll.dll 
exports a function called RtlIsDosDeviceName_U().  The WINE implementation has 
the following to say about it:

/***********************************************************************
 *             RtlIsDosDeviceName_U   (NTDLL.@)
 *
 * Check if the given DOS path contains a DOS device name.
 *
 * Returns the length of the device name in the low word and its
 * position in the high word (both in bytes, not WCHARs), or 0 if no
 * device name is found.
 */
ULONG WINAPI RtlIsDosDeviceName_U( PCWSTR dos_name )

Also, from the patch:
          /* COM and LPT must be followed by a single digit */
The code in src/winsup/cygwin/devices.cc would seem to indicate that the number 
is not limited to a single digit.

Cheers