Process Functions

Process และ command execution functions

Command::new

use std::process::Command;

fn main() {
    // Basic command execution
    let output = Command::new("echo")
        .arg("Hello")
        .output()
        .expect("Failed to execute");

    println!("Output: {}", String::from_utf8_lossy(&output.stdout));

    // With multiple args
    let output = Command::new("ls")
        .args(["-l", "-a", "-h"])
        .output()
        .expect("Failed");

    println!("ls output lines: {}",
        String::from_utf8_lossy(&output.stdout).lines().count());

    // Shell command
    let output = Command::new("sh")
        .arg("-c")
        .arg("echo $HOME && pwd")
        .output()
        .expect("Failed");

    println!("\nShell output:\n{}", String::from_utf8_lossy(&output.stdout));

    // status() - just exit code
    let status = Command::new("true")
        .status()
        .expect("Failed");

    println!("true exit code: {:?}", status.code());

    // spawn() - background process
    let child = Command::new("sleep")
        .arg("0.1")
        .spawn()
        .expect("Failed");

    println!("Child PID: {}", child.id());
}