var ss []string
	for _, p := range []string{
		"testdata/gnu.tar",
		"testdata/ustar-file-reg.tar",
		"testdata/pax-path-hdr.tar",
		"testdata/sparse-formats.tar",
	} {
		buf, err := os.ReadFile(p)
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		ss = append(ss, string(buf))
	}

	data1, data2, pax, sparse := ss[0], ss[1], ss[2], ss[3]
	data2 += strings.Repeat("\x00", 10*512)

pkg syscall (darwin-386), const ENEEDAUTH = 81
pkg syscall (darwin-386), const ENETDOWN = 50
pkg syscall (darwin-386), const ENETRESET = 52
pkg syscall (darwin-386), const ENETUNREACH = 51
pkg syscall (darwin-386), const ENFILE = 23
pkg syscall (darwin-386), const ENOATTR = 93
pkg syscall (darwin-386), const ENOBUFS = 55
pkg syscall (darwin-386), const ENODATA = 96
pkg syscall (darwin-386), const ENODEV = 19