Function socketpair

pub unsafe fn socketpair(
    domain: i32,
    type_: i32,
    protocol: i32,
    pair: &mut [i32; 2],
) -> Result<(), i32> 

Available on crate feature dep_nc only.

Create a pair of connected socket.

Examples

use std::thread;

const READ_SIDE: usize = 0;
const WRITE_SIDE: usize = 1;

let mut fds = [-1_i32; 2];

let ret = unsafe { nc::socketpair(nc::AF_UNIX, nc::SOCK_STREAM, 0, &mut fds) };
assert!(ret.is_ok());
println!("socket pairs: {}, {}", fds[0], fds[1]);

// Start worker thread
thread::spawn(move || {
    println!("worker thread started");
    let msg = "Hello, Rust";
    println!("[worker] Will send msg: {msg}");
    let ret = unsafe { nc::write(fds[WRITE_SIDE], msg.as_bytes()) };
    assert!(ret.is_ok());
    assert_eq!(ret, Ok(msg.len() as nc::ssize_t));
});

let mut buf = [0_u8; 1024];
let ret = unsafe { nc::read(fds[READ_SIDE], &mut buf) };
assert!(ret.is_ok());
let nread = ret.unwrap();
let msg = std::str::from_utf8(&buf[..nread as usize]).unwrap();
println!("[main] recv msg: {msg}");

unsafe {
    let _ = nc::close(fds[0]);
    let _ = nc::close(fds[1]);
}