040000 tree 0630f9b4a6c6298d25bdab9e6fafde357c49c5b9	cache
040000 tree 8a3c00fe7006f734e8020e8bf5c33f484c0e1014	lru
040000 tree d556ee12a493670801f5be74a037274f839da463	pingpong
040000 tree 44fdc2708587af88e31580b502aec4610fca25e4	server
040000 tree b72c1d5b3eeead43410d52d52b053f74e6aeba8c	test_principal
040000 tree 8607ba2c4c0817b1e3f155ad633c460207ec78b7	unixfd