Function ssh_base_command

crates/openshell-cli/src/ssh.rs:142–169

(proxy_command: &str)

}

fn ssh_base_command(proxy_command: &str) -> Command {
    // SSH log level follows the program's verbosity.  main() maps the `-v`
    // count to OPENSHELL_SSH_LOG_LEVEL; an explicit env-var override wins.
    let ssh_log_level =
        std::env::var("OPENSHELL_SSH_LOG_LEVEL").unwrap_or_else(|_| "ERROR".to_string());

    let mut command = Command::new("ssh");
    command
        .arg("-o")
        .arg(format!("ProxyCommand={proxy_command}"))
        .arg("-o")
        .arg("StrictHostKeyChecking=no")
        .arg("-o")
        .arg("UserKnownHostsFile=/dev/null")
        .arg("-o")
        .arg("GlobalKnownHostsFile=/dev/null")
        .arg("-o")
        .arg(format!("LogLevel={ssh_log_level}"))
        // Detect a dead relay within ~45s. The relay rides on a TCP connection
        // that the client has no way to observe silently dropping (gateway
        // restart, supervisor restart, cluster failover), so fall back to
        // SSH-level keepalives instead of hanging forever.
        .arg("-o")
        .arg("ServerAliveInterval=15")
        .arg("-o")
        .arg("ServerAliveCountMax=3");
    command
}

#[cfg(unix)]
const TRANSIENT_TTY_SIGNALS: &[Signal] = &[Signal::SIGINT, Signal::SIGQUIT, Signal::SIGTERM];