Function ret_discarded_fd

src/backend/linux_raw/conv.rs:1027–1030

(raw: RetReg<R0>)

/// returns a file descriptor.
#[inline]
pub(super) unsafe fn ret_discarded_fd(raw: RetReg<R0>) -> io::Result<()> {
    let _raw_fd = try_decode_raw_fd(raw)?;
    Ok(())
}

/// Convert a `usize` returned from a syscall that effectively returns a
/// `*mut c_void` on success.