Playing with the rust ffi stuff.

Basic R2 Util Call

use std::libc::c_int;
use std::io::println;

#[link(name= "r_util")]

extern {
        fn r_file_exists(str: &'static str) -> c_int;
}

fn main() {
        let p = "/usr/bin/r2";
        let x = unsafe {r_file_exists (p)};
        println(format!("File Exists: {:d}", x));

}