strsignal
extern const char *strsignal(int signum);
signal_name(signalNumber).c_str(), strsignal(signalNumber),
strsignal(signalNumber), signal_info(message.info).c_str());
signal, strsignal(signal));
fprintf(stderr, "%s: %s\n", message, strsignal(signal));
fprintf(stderr, "%s\n", strsignal(signal));