EPOLLIN		0x00000001
EPOLLPRI	0x00000002
EPOLLOUT	0x00000004
EPOLLERR	0x00000008
EPOLLHUP	0x00000010
EPOLLNVAL	0x00000020
EPOLLRDNORM	0x00000040
EPOLLRDBAND	0x00000080
EPOLLWRNORM	0x00000100
EPOLLWRBAND	0x00000200
EPOLLMSG	0x00000400
EPOLLRDHUP	0x00002000
EPOLLEXCLUSIVE	0x10000000
EPOLLWAKEUP	0x20000000
EPOLLONESHOT	0x40000000
EPOLLET		0x80000000