macpow 0.1.17

Real-time power consumption monitor for Apple Silicon Macs
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use std::process::{Command, Output, Stdio};
use std::time::{Duration, Instant};

/// Run a command and return its output, aborting if it exceeds `timeout`.
pub fn command_output_timeout(program: &str, args: &[&str], timeout: Duration) -> Option<Output> {
    let mut child = Command::new(program)
        .args(args)
        .stdout(Stdio::piped())
        .stderr(Stdio::piped())
        .spawn()
        .ok()?;

    let deadline = Instant::now() + timeout;
    loop {
        match child.try_wait() {
            Ok(Some(_)) => return child.wait_with_output().ok(),
            Ok(None) => {
                if Instant::now() >= deadline {
                    let _ = child.kill();
                    let _ = child.wait();
                    return None;
                }
                std::thread::sleep(Duration::from_millis(10));
            }
            Err(_) => {
                let _ = child.kill();
                let _ = child.wait();
                return None;
            }
        }
    }
}