@section @code{ioctl}
@findex ioctl
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/ioctl.html}
+POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/ioctl.html}
-Gnulib module: ---
+Gnulib module: ioctl
Portability problems fixed by Gnulib:
@itemize
+@item
+On Windows platforms (excluding Cygwin), @code{ioctl} is called
+@code{ioctlsocket}, and error codes for this function are not placed in
+@code{errno}, and @code{WSAGetLastError} must be used instead.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
-This function is missing on some platforms:
-mingw.
-@item
Most @code{ioctl} requests are platform and hardware specific.
@end itemize