Function nc::inotify_add_watch

pub fn inotify_add_watch(
    fd: i32, 
    filename: &str, 
    mask: u32
) -> Result<i32, Errno>

Add a watch to an initialized inotify instance.

let ret = nc::inotify_init1(nc::IN_NONBLOCK | nc::IN_CLOEXEC);
assert!(ret.is_ok());
let fd = ret.unwrap();

let path = "/etc/passwd";
let ret = nc::inotify_add_watch(fd, path, nc::IN_MODIFY);
assert!(ret.is_ok());
let _wd = ret.unwrap();
assert!(nc::close(fd).is_ok());