pollution: unp_pid
__pid_t unp_pid; 

pollution: unp_euid
__uid_t unp_euid; 

pollution: unp_egid
__gid_t unp_egid; 

pollution: unpcbid
struct unpcbid { __pid_t unp_pid; __uid_t unp_euid; __gid_t unp_egid; }; 

pollution: PRIxREGISTER
#define PRIxREGISTER "x"