assert_no_err(copyfile(file_src, file_dst, NULL, COPYFILE_DATA|COPYFILE_STAT|COPYFILE_PRESERVE_DST_TRACKED));
assert_no_err(stat(file_dst, &dst_stb));
assert_no_err(copyfile(file_src, file_dst, NULL, COPYFILE_DATA|COPYFILE_STAT|COPYFILE_PRESERVE_DST_TRACKED));
assert_no_err(stat(file_dst, &dst_stb));