By many accounts, nearly 900,000 federal employees have been furloughed (i.e. sent home) and several hundred thousand more are working without pay during the shutdown.
Essential services (e.g. military operations, some law enforcement, Social Security, Medicare, veterans’ care) generally continue, but many programs and agencies are partially or fully scaled back.
Courts have announced they can continue paying staff through October 17 under existing funds — but beyond that, only judges and Supreme Court justices have constitutional guarantees.