Class sigaction

src/backward.h:4240–4240

        for (size_t i = 0; i < posix_signals.size(); ++i) {
            struct sigaction action;
            memset(&action, 0, sizeof action);
            action.sa_flags = static_cast<int>(SA_SIGINFO | SA_ONSTACK | SA_NODEFER | SA_RESETHAND);
            sigfillset(&action.sa_mask);