Class sigaction

subprojects/llama.cpp/tools/server/server.cpp:270–270

    // TODO: refactor in common/console
#if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__))
    struct sigaction sigint_action;
    sigint_action.sa_handler = signal_handler;
    sigemptyset (&sigint_action.sa_mask);
    sigint_action.sa_flags = 0;