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@node ioctl
@section @code{ioctl}
@findex ioctl
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/ioctl.html}
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.
@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:
@itemize
@item
Most @code{ioctl} requests are platform and hardware specific.
@end itemize
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