9d13a2995c
First cut of a signalfd implementation. Still TODO: Non-polling select. This should mostly work as on Linux except for missing support for some members of struct signalfd_siginfo, namely ssi_fd, ssi_band (both SIGIO/SIGPOLL, not fully implemented) and ssi_trapno (HW exception, required HW support). Signed-off-by: Corinna Vinschen <corinna@vinschen.de>