Function nc::fdatasync

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

Flush all modified in-core data (exclude metadata) refered by fd to disk.

Example

let path = "/tmp/nc-fdatasync";
let fd = unsafe { nc::openat(nc::AT_FDCWD, path, nc::O_WRONLY | nc::O_CREAT, 0o644) };
assert!(fd.is_ok());
let fd = fd.unwrap();
let msg = b"Hello, Rust";
let ret = unsafe { nc::write(fd, msg.as_ptr() as usize, msg.len()) };
assert!(ret.is_ok());
assert_eq!(ret, Ok(msg.len() as nc::ssize_t));
let ret = unsafe { nc::close(fd) };
assert!(ret.is_ok());
let ret = unsafe { nc::unlinkat(nc::AT_FDCWD, path, 0) };
assert!(ret.is_ok());