(* Ubuntu 17.10 /usr/include/i386-linux-gnu/asm/signal.h, /usr/include/i386-linux-gnu/bits/sigaction.h *) sa_sigaction*: sa_sigaction_t; (* union with sa_handler*: PtrProc;*) sa_mask*: sigset_t; sa_flags*: intFlags; sa_restorer*: PROCEDURE [ccall];
