pollution: POLL_MSG
#define POLL_MSG 3

pollution: TRAP_TRACE
#define TRAP_TRACE 2

pollution: TRAP_BRKPT
#define TRAP_BRKPT 1

pollution: POLL_OUT
#define POLL_OUT 2

pollution: POLL_HUP
#define POLL_HUP 6

pollution: POLL_ERR
#define POLL_ERR 4

pollution: POLL_PRI
#define POLL_PRI 5

pollution: POLL_IN
#define POLL_IN 1