Function nix::unistd::execv  
pub fn execv<S: AsRef<CStr>>(path: &CStr, argv: &[S]) -> Result<Infallible>Documentation
Replace the current process image with a new one (see exec(3)).
See the ::nix::unistd::execve system call for additional details.  execv
performs the same action but does not allow for customization of the
environment for the new process.