如何同步调用shell命令？

import subprocess

result = subprocess.run(['ls', '-l'], capture_output=True, text=True)
print(result.stdout)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ShellCommand {
    public static void main(String[] args) {
        try {
            ProcessBuilder processBuilder = new ProcessBuilder("ls", "-l");
            Process process = processBuilder.start();

            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }

            int exitCode = process.waitFor();
            System.out.println("Exit Code: " + exitCode);
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}

#include <iostream>
#include <cstdlib>

int main() {
    int result = std::system("ls -l");
    std::cout << "Exit Code: " << result << std::endl;
    return 0;
}