On Thu, Aug 20, 2009 at 02:11:06PM +0100, Dave Korn wrote: >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. See also Chen on handles: >>http://blogs.msdn.com/oldnewthing/archive/2005/01/21/358109.aspx Is there something wrong with Cygwin's code for determining if a handle is a console? ... if (GetConsoleScreenBufferInfo (handle, &buf)) { ... } else if (GetNumberOfConsoleInputEvents (handle, (DWORD *) &buf)) { ... } It's been working pretty well for centuries. cgf -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple