Function nc::sync_file_range

pub fn sync_file_range(
    fd: i32, 
    offset: off_t, 
    nbytes: off_t, 
    flags: i32
) -> Result<(), Errno>

Sync a file segment to disk

let path = "/tmp/nc-sync-file-range";
let ret = nc::openat(nc::AT_FDCWD, path, nc::O_WRONLY | nc::O_CREAT, 0o644);
assert!(ret.is_ok());
let fd = ret.unwrap();

let msg = "Hello, Rust";
let ret = nc::write(fd, msg.as_ptr() as usize, msg.len());
assert!(ret.is_ok());
let n_write = ret.unwrap();
assert_eq!(n_write, msg.len() as nc::ssize_t);

let ret = nc::sync_file_range(
    fd,
    0,
    n_write,
    nc::SYNC_FILE_RANGE_WAIT_BEFORE
        | nc::SYNC_FILE_RANGE_WRITE
        | nc::SYNC_FILE_RANGE_WAIT_AFTER,
);
assert!(ret.is_ok());

assert!(nc::close(fd).is_ok());
assert!(nc::unlinkat(nc::AT_FDCWD, path, 0).is_ok());