Function nc::fsync

pub fn fsync(fd: i32) -> Result<(), Errno>

Flush all modified in-core data refered by fd to disk.

let path = "/tmp/nc-fsync";
let ret = nc::open(path, nc::O_CREAT | nc::O_WRONLY, 0o644);
assert!(ret.is_ok());
let fd = ret.unwrap();
let buf = b"Hello, Rust";
let n_write = nc::write(fd, buf.as_ptr() as usize, buf.len());
assert_eq!(n_write, Ok(buf.len() as isize));
assert!(nc::fsync(fd).is_ok());
assert!(nc::close(fd).is_ok());
assert!(nc::unlink(path).is_ok());