@node errno
@section @code{errno}
@findex errno

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/errno.html}

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
On Windows, the socket functions don't set @code{errno}; their error code is
available through @code{WSAGetLastError()} instead.
@end itemize