CS452 Lab03 - Sample1 (Rust)

sample1.rs

extern crate signal_hook;

use std::error::Error;
use std::time::Duration;
use nix::unistd::{pause, sleep};
use signal_hook::{register, SIGINT};

static mut I_CAN_RUN: bool = true;

fn main() -> Result<(), Box<dyn Error>> {
    unsafe {
        register(SIGINT, sig_handler)?;
    }

    let mut extra_life = 5;
    while unsafe { I_CAN_RUN} || extra_life > 0  {
        println!("Waiting...");
        std::thread::sleep(Duration::from_millis(300));
        if unsafe {!I_CAN_RUN} {
            extra_life = extra_life - 1;
        }
    }

    // match pause() {
    //     Err(e) => println!("Error due to {}", e),
    //     _ => {}
    // }
    println!("Out of the loop");
    Ok(())
}

fn sig_handler() {
    println!("received an interrupt");
    sleep(5);
    unsafe { I_CAN_RUN = false; }
    println!("outta here.")
}