5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/ioctl.html}
9 Portability problems fixed by Gnulib:
12 On Windows platforms (excluding Cygwin), @code{ioctl} is called
13 @code{ioctlsocket}, and error codes for this function are not placed in
14 @code{errno}, and @code{WSAGetLastError} must be used instead.
16 On glibc platforms, the second parameter is of type @code{unsigned long}
17 rather than @code{int}.
20 Portability problems not fixed by Gnulib:
23 Most @code{ioctl} requests are platform and hardware specific.