/usr/share/backgroundrb/server/ is in libbackgroundrb-ruby1.8 1.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/backgroundrb/server/backgroundrb_server.rb
/usr/share/backgroundrb/server/lib/
/usr/share/backgroundrb/server/lib/bdrb_result_storage.rb
/usr/share/backgroundrb/server/lib/bdrb_server_helper.rb
/usr/share/backgroundrb/server/lib/bdrb_thread_pool.rb
/usr/share/backgroundrb/server/lib/cron_trigger.rb
/usr/share/backgroundrb/server/lib/invalid_dump_error.rb
/usr/share/backgroundrb/server/lib/log_worker.rb
/usr/share/backgroundrb/server/lib/master_proxy.rb
/usr/share/backgroundrb/server/lib/master_worker.rb
/usr/share/backgroundrb/server/lib/meta_worker.rb
/usr/share/backgroundrb/server/lib/trigger.rb