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According to Dave Korn on 8/20/2009 7:11 AM:
> Eric Blake wrote:
>
>> See this thread on the gnulib list, which claims that you can use this
>> undocumented snippet to decide whether a HANDLE is a console:
>>
>>> #define IsHandleConsole(h) (((long) (h) & 3) == 3)
>> http://lists.gnu.org/archive/html/bug-gnulib/2009-08/msg00065.html
>
> I wouldn't rely on that for a microsecond. The low two bits of a HANDLE are
> pretty free form and could easily be used for other purposes by other types of
> object. Read the rest of the thread; it's a convention used internally by
> WINE. MS doesn't necessarily follow suit.
Agreed - Bruno raised this concern, but Paolo committed the change anyway,
so I've asked them to clarify.
At any rate, Bruno also had this suggestion in that thread:
static BOOL
IsHandleConsole(HANDLE h)
{
DWORD mode;
return GetConsoleMode (h, &mode);
}
- --
Don't work too hard, make some time for fun as well!
Eric Blake e...@byu.net
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