fd0                92 maint/gnulib/tests/test-futimens.h     int fd0 = dup (0);
fd0                93 maint/gnulib/tests/test-futimens.h     ASSERT (0 <= fd0);
fd0                94 maint/gnulib/tests/test-futimens.h     ASSERT (close (fd0) == 0);
fd0                96 maint/gnulib/tests/test-futimens.h     ASSERT (func (fd0, NULL) == -1);