change_euid
change_euid(cred, rootinfo);
change_euid(imgp->newcred, euip);
change_euid(newcred, euip);
change_euid(newcred, euip);
change_euid(newcred, euip);
change_euid(new_cred, uip);
change_euid(newcred, uip);
void change_euid(struct ucred *newcred, struct uidinfo *euip);