_kern_setresuid
extern status_t _kern_setresuid(uid_t ruid, uid_t euid, uid_t suid,
return set_errno_if_necessary(_kern_setresuid((uid_t)-1, uid, (uid_t)-1, false));
return set_errno_if_necessary(_kern_setresuid(ruid, euid, (uid_t)-1, false));
return set_errno_if_necessary(_kern_setresuid(ruid, euid, suid, false));
return set_errno_if_necessary(_kern_setresuid(uid, (uid_t)-1, (uid_t)-1, true));