Function socketpair

src/backend/libc/net/syscalls.rs:412–434

(
    domain: AddressFamily,
    type_: SocketType,
    flags: SocketFlags,
    protocol: Option<Protocol>,
)

#[cfg(not(windows))]
pub(crate) fn socketpair(
    domain: AddressFamily,
    type_: SocketType,
    flags: SocketFlags,
    protocol: Option<Protocol>,
) -> io::Result<(OwnedFd, OwnedFd)> {
    let raw_protocol = match protocol {
        Some(p) => p.0.get(),
        None => 0,
    };
    unsafe {
        let mut fds = MaybeUninit::<[OwnedFd; 2]>::uninit();
        ret(c::socketpair(
            c::c_int::from(domain.0),
            (type_.0 | flags.bits()) as c::c_int,
            raw_protocol as c::c_int,
            fds.as_mut_ptr().cast::<c::c_int>(),
        ))?;

        let [fd0, fd1] = fds.assume_init();
        Ok((fd0, fd1))
    }
}