init: use a no-op signal handler instead of SIG_IGN for SIGPIPE am: 2bf886af am: a098b74a

    InitKernelLogging(argv);

    LOG(INFO) << "init second stage started!";

    // Will handle EPIPE at the time of write by checking the errno

    signal(SIGPIPE, SIG_IGN);

    // Init should not crash because of a dependence on any other process, therefore we ignore

    // SIGPIPE and handle EPIPE at the call site directly.  Note that setting a signal to SIG_IGN

    // is inherited across exec, but custom signal handlers are not.  Since we do not want to

    // ignore SIGPIPE for child processes, we set a no-op function for the signal handler instead.

    {

        struct sigaction action = {.sa_flags = SA_RESTART};

        action.sa_handler = [](int) {};

        sigaction(SIGPIPE, &action, nullptr);

    }

    // Set init and its forked children's oom_adj.

    if (auto result =