doc/posix-functions/socket.texi

@node socket
@subsection @code{socket}
@findex socket

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/socket.html}

Gnulib module: socket
@mindex socket

Portability problems fixed by Gnulib:
@itemize
@item
This function is declared in @code{<winsock2.h>}
instead of @code{<sys/socket.h>}
on some platforms:
mingw, MSVC 14.
@item
On Windows platforms (excluding Cygwin), the descriptors returned by
the @code{socket} function cannot be used in calls to @code{read},
@code{write}, and @code{close}; you have to use @code{recv}, @code{send},
@code{closesocket} in these cases instead.
@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
@end itemize