Function query_status

resources/windows_service/src/service.rs:353–383

Query the current runtime status of a service.

(service_handle: SC_HANDLE)

/// Query the current runtime status of a service.
unsafe fn query_status(service_handle: SC_HANDLE) -> Result<ServiceStatus, ServiceError> {
    let mut buffer = vec![0u8; mem::size_of::<SERVICE_STATUS_PROCESS>()];
    let mut bytes_needed: u32 = 0;

    unsafe {
        QueryServiceStatusEx(
            service_handle,
            SC_STATUS_PROCESS_INFO,
            Some(&mut buffer),
            &mut bytes_needed,
        )
        .map_err(|e| t!("get.queryStatusFailed", error = e.to_string()).to_string())?;
    }

    let status = unsafe { &*(buffer.as_ptr().cast::<SERVICE_STATUS_PROCESS>()) };

    match status.dwCurrentState {
        SERVICE_STOPPED => Ok(ServiceStatus::Stopped),
        SERVICE_START_PENDING => Ok(ServiceStatus::StartPending),
        SERVICE_STOP_PENDING => Ok(ServiceStatus::StopPending),
        SERVICE_RUNNING => Ok(ServiceStatus::Running),
        SERVICE_CONTINUE_PENDING => Ok(ServiceStatus::ContinuePending),
        SERVICE_PAUSE_PENDING => Ok(ServiceStatus::PausePending),
        SERVICE_PAUSED => Ok(ServiceStatus::Paused),
        other => Err(
            t!("get.queryStatusFailed", error = format!("unknown state: {}", other.0))
                .to_string()
                .into(),
        ),
    }
}

/// Convert a `ServiceStatus` to the corresponding Windows `SERVICE_STATUS_CURRENT_STATE` constant.
fn status_to_current_state(status: &ServiceStatus) -> SERVICE_STATUS_CURRENT_STATE {