rsock_getfamily  1148 ext/socket/ancdata.c     family = rsock_getfamily(fptr);
rsock_getfamily  1646 ext/socket/ancdata.c     family = rsock_getfamily(fptr);
rsock_getfamily   217 ext/socket/basicsocket.c     family = rsock_getfamily(fptr);
rsock_getfamily   313 ext/socket/basicsocket.c     family = rsock_getfamily(fptr);
rsock_getfamily   282 ext/socket/rubysocket.h int rsock_getfamily(rb_io_t *fptr);