Note that the standard signals are not queued, a signal handler for a specific signal might be run just once if several signals are sent between the first signa

Note that the standard signals are not queued, a signal handler for a specific signal might be run just once if several signals are sent between the first signal arriving and the signal being handled. As an extension, there are "real-time" signals as well, which are queued - linux implement them, see e.g. http://man7.org/linux/man-pages/man7/signal.7.html http://man7.org/linux/man-pages/man7/signal.7.html