5 POSIX specification: @url{http://www.opengroup.org/susv3xsh/ioctl.html}
9 Portability problems fixed by Gnulib:
12 On Windows platforms (excluding Cygwin), error codes for @code{ioctl}
13 are not placed in @code{errno}, and @code{WSAGetLastError} must be
16 @code{ioctl} is called @code{ioctlsocket} under mingw
19 Portability problems not fixed by Gnulib:
22 Most @code{ioctl} requests are platform and hardware specific.