SVR4_IOR           39 compat/svr4/svr4_filio.h #define	SVR4_FIOGETOWN	SVR4_IOR('f', 123, int)
SVR4_IOR           43 compat/svr4/svr4_filio.h #define	SVR4_FIONREAD	SVR4_IOR('f', 127, int)
SVR4_IOR           91 compat/svr4/svr4_sockio.h #define	SVR4_SIOCGIFNUM		SVR4_IOR('i', 87, int)