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@node setsockopt
@section @code{setsockopt}
@findex setsockopt
POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html}
LSB specification:@* @url{https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/baselib-setsockopt-2.html}
Gnulib module: setsockopt
Portability problems fixed by Gnulib:
@itemize
@item
On Windows platforms (excluding Cygwin), error codes from 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
Many socket options are not available on all platforms.
@end itemize
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