CS452 Lab02 - Sample 2 (Rust)

lab02_b.rs

use std::env;
use nix::unistd::fork;
use std::process;

fn main() {
    let args: Vec<String> = env::args().collect();
    if args.len() < 2 {
        eprintln!("Not enough argument");
        return;
    }
    let limit = args[1].parse::<u32>();
    if let Ok(n) = limit {
        let _ = fork();
        let _ = fork();
        let who = process::id();
        for n in 0..n {
            println!("PID: {}  {}", who, n);
        }    
    } else {
        eprintln!("Input {} is not an integer", args[1]);
    }
}