@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: ioctl
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.
+@item
+On glibc platforms, the second parameter is of type @code{unsigned long}
+rather than @code{int}.
@end itemize
Portability problems not fixed by Gnulib: