Function invoke_sshd_config_validation

resources/sshdconfig/src/util.rs:115–148

Invoke sshd -T. # Errors This function will return an error if sshd -T fails to validate `sshd_config`.

(args: Option<SshdCommandArgs>)

///
/// This function will return an error if sshd -T fails to validate `sshd_config`.
pub fn invoke_sshd_config_validation(args: Option<SshdCommandArgs>) -> Result<String, SshdConfigError> {
    let mut command = Command::new("sshd");
    command.arg("-T");

    if let Some(args) = args {
        if let Some(filepath) = args.filepath {
            if !filepath.exists() {
                return Err(SshdConfigError::FileNotFound(filepath.display().to_string()));
            }
            command.arg("-f").arg(&filepath);
        }
        if let Some(additional_args) = args.additional_args {
            command.args(additional_args);
        }
    }

    let output = command.output()
        .map_err(|e| SshdConfigError::CommandError(e.to_string()))?;

    if output.status.success() {
        let stdout = String::from_utf8(output.stdout)
            .map_err(|e| SshdConfigError::CommandError(e.to_string()))?;
        Ok(stdout)
    } else {
        let stderr = String::from_utf8(output.stderr)
            .map_err(|e| SshdConfigError::CommandError(e.to_string()))?;
        if stderr.contains("sshd: no hostkeys available") || stderr.contains("Permission denied") {
            return Err(SshdConfigError::CommandError(
                t!("util.sshdElevation").to_string()
            ));
        }
        Err(SshdConfigError::CommandError(stderr))
    }
}

/// Extract SSH server defaults by running sshd -T with an empty configuration file.
///