Macros starting with `f' in sys

• FD_CLR sys/types.h:140
• FD_COPY sys/types.h:142
• FD_ISSET sys/types.h:141
• FD_SET sys/types.h:139
• FD_ZERO sys/types.h:143
• FFLAGS sys/fcntl.h:101
• FREE sys/malloc.h:265