FIONREAD          330 maint/gnulib/lib/poll.c         ioctl (fd, FIONREAD, &r);
FIONREAD           33 maint/gnulib/tests/test-ioctl.c #ifdef FIONREAD
FIONREAD           38 maint/gnulib/tests/test-ioctl.c     ASSERT (ioctl (-1, FIONREAD, &value) == -1);
FIONREAD           45 maint/gnulib/tests/test-ioctl.c     ASSERT (ioctl (99, FIONREAD, &value) == -1);