use std::process::Command;

fn main() {
    let output = Command::new("curl")
       .arg("-X POST --data '{\"jsonrpc\":\"2.0\",\"method\":\"sayhello\",\"params\":[],\"id\":1}'")
        // .arg("--help")
        .output().unwrap_or_else(|e| {
            panic!("failed to execute process: {}", e)
    });

    if output.status.success() {
        let s = String::from_utf8_lossy(&output.stdout);

        print!("curl succeeded and stdout was:\n{}", s);
    } else {
        let s = String::from_utf8_lossy(&output.stderr);

        print!("curl failed and stderr was:\n{}", s);
    }
}