checkexit
int checkexit(pid_t, enum comp);
rc = checkexit(pids[COMP_KEY], COMP_KEY) +
checkexit(pids[COMP_CERT], COMP_CERT) +
checkexit(pids[COMP_NET], COMP_NET) +
checkexit(pids[COMP_ACCOUNT], COMP_ACCOUNT) +
checkexit(pids[COMP_CHALLENGE], COMP_CHALLENGE) +
checkexit(pids[COMP_DNS], COMP_DNS) +
checkexit(pids[COMP_REVOKE], COMP_REVOKE);