Function nc::fsync

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

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

Example

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