Function export_services

resources/windows_service/src/service.rs:400–430

Export (enumerate) all services, optionally filtering by the provided criteria. Returns a list of matching services.

(filter: Option<&WindowsService>)

/// Export (enumerate) all services, optionally filtering by the provided criteria.
/// Returns a list of matching services.
pub fn export_services(filter: Option<&WindowsService>) -> Result<Vec<WindowsService>, ServiceError> {
    let scm = unsafe { OpenSCManagerW(None, None, SC_MANAGER_CONNECT | SC_MANAGER_ENUMERATE_SERVICE) }
        .map_err(|e| ServiceError::from(t!("get.openScmFailed", error = e.to_string()).to_string()))?;
    let scm = ScHandle(scm);

    let services = unsafe { enumerate_services(scm.0) }?;
    let mut results = Vec::new();

    // Pre-compute the status filter value for early rejection before expensive per-service queries
    let status_filter_dw = filter.and_then(|f| f.status.as_ref()).map(status_to_current_state);

    for (service_name, current_state) in &services {
        // Quick reject based on status before opening the service handle
        if let Some(expected_state) = status_filter_dw && *current_state != expected_state {
            continue;
        }

        let svc = match unsafe { get_service_details(scm.0, service_name) } {
            Ok(s) => s,
            Err(_) => continue, // skip services we can't query
        };

        if let Some(f) = filter && !matches_filter(&svc, f) {
            continue;
        }

        results.push(svc);
    }

    Ok(results)
}

/// Enumerate all Win32 services using `EnumServicesStatusExW`, handling pagination.
/// Returns a list of `(service_name, current_state)` tuples.