Function execvp 

pub fn execvp<S, I>(program: S, args: I) -> Error
where
    S: AsRef<OsStr>,
    I: IntoIterator,
    I::Item: AsRef<OsStr>,

Run program with args, completely replacing the currently running program. If it returns at all, it always returns an error.

Note that program and the first element of args will normally be identical. The former is the program we ask the operating system to run, and the latter is the value that will show up in argv[0] when the program executes. On POSIX systems, these can technically be completely different, and we’ve perserved that much of the low-level API here.

Examples

let err = exec::execvp("echo", &["echo", "foo"]);
println!("Error: {}", err);