Function extract_sshd_defaults

resources/sshdconfig/src/util.rs:155–184

Extract SSH server defaults by running sshd -T with an empty configuration file. # Errors This function will return an error if it fails to extract the defaults from sshd.

()

///
/// This function will return an error if it fails to extract the defaults from sshd.
pub fn extract_sshd_defaults() -> Result<Map<String, Value>, SshdConfigError> {
    let temp_file = tempfile::Builder::new()
        .prefix("sshd_config_empty_")
        .suffix(".tmp")
        .tempfile()?;

    // on Windows, sshd cannot read from the file if it is still open
    let temp_path = temp_file.path().to_path_buf();
    // do not automatically delete the file when it goes out of scope
    let (file, path) = temp_file.keep()?;
    // close the file handle to allow sshd to read it
    drop(file);

    debug!("{}", t!("util.tempFileCreated", path = temp_path.display()));
    let args = Some(
        SshdCommandArgs {
            filepath: Some(temp_path),
            additional_args: None,
        }
    );

    // Clean up the temporary file regardless of success or failure
    let output = invoke_sshd_config_validation(args);
    if let Err(e) = std::fs::remove_file(&path) {
        debug!("{}", t!("util.cleanupFailed", path = path.display(), error = e));
    }
    let result = output?;
    let sshd_config: Map<String, Value> = parse_text_to_map(&result)?;
    Ok(sshd_config)
}

/// Extract _metadata field from the input string, if it can be parsed as JSON.
///