Function systemd::daemon::pid_notify_with_fds

pub fn pid_notify_with_fds<'a, I, K, V>(
    pid: pid_t, 
    unset_environment: bool, 
    state: I, 
    fds: &[Fd]
) -> Result<bool> where
    I: Iterator<Item = &'a (K, V)>,
    K: AsRef<str> + 'a,
    V: AsRef<str> + 'a, 

Similar to pid_notify(), but this also sends file descriptors to the store.