| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package tar |
| |
| import ( |
| "bytes" |
| "crypto/md5" |
| "fmt" |
| "io" |
| "io/ioutil" |
| "math" |
| "os" |
| "reflect" |
| "strings" |
| "testing" |
| "time" |
| ) |
| |
| type untarTest struct { |
| file string // Test input file |
| headers []*Header // Expected output headers |
| chksums []string // MD5 checksum of files, leave as nil if not checked |
| err error // Expected error to occur |
| } |
| |
| var gnuTarTest = &untarTest{ |
| file: "testdata/gnu.tar", |
| headers: []*Header{ |
| { |
| Name: "small.txt", |
| Mode: 0640, |
| Uid: 73025, |
| Gid: 5000, |
| Size: 5, |
| ModTime: time.Unix(1244428340, 0), |
| Typeflag: '0', |
| Uname: "dsymonds", |
| Gname: "eng", |
| }, |
| { |
| Name: "small2.txt", |
| Mode: 0640, |
| Uid: 73025, |
| Gid: 5000, |
| Size: 11, |
| ModTime: time.Unix(1244436044, 0), |
| Typeflag: '0', |
| Uname: "dsymonds", |
| Gname: "eng", |
| }, |
| }, |
| chksums: []string{ |
| "e38b27eaccb4391bdec553a7f3ae6b2f", |
| "c65bd2e50a56a2138bf1716f2fd56fe9", |
| }, |
| } |
| |
| var sparseTarTest = &untarTest{ |
| file: "testdata/sparse-formats.tar", |
| headers: []*Header{ |
| { |
| Name: "sparse-gnu", |
| Mode: 420, |
| Uid: 1000, |
| Gid: 1000, |
| Size: 200, |
| ModTime: time.Unix(1392395740, 0), |
| Typeflag: 0x53, |
| Linkname: "", |
| Uname: "david", |
| Gname: "david", |
| Devmajor: 0, |
| Devminor: 0, |
| }, |
| { |
| Name: "sparse-posix-0.0", |
| Mode: 420, |
| Uid: 1000, |
| Gid: 1000, |
| Size: 200, |
| ModTime: time.Unix(1392342187, 0), |
| Typeflag: 0x30, |
| Linkname: "", |
| Uname: "david", |
| Gname: "david", |
| Devmajor: 0, |
| Devminor: 0, |
| }, |
| { |
| Name: "sparse-posix-0.1", |
| Mode: 420, |
| Uid: 1000, |
| Gid: 1000, |
| Size: 200, |
| ModTime: time.Unix(1392340456, 0), |
| Typeflag: 0x30, |
| Linkname: "", |
| Uname: "david", |
| Gname: "david", |
| Devmajor: 0, |
| Devminor: 0, |
| }, |
| { |
| Name: "sparse-posix-1.0", |
| Mode: 420, |
| Uid: 1000, |
| Gid: 1000, |
| Size: 200, |
| ModTime: time.Unix(1392337404, 0), |
| Typeflag: 0x30, |
| Linkname: "", |
| Uname: "david", |
| Gname: "david", |
| Devmajor: 0, |
| Devminor: 0, |
| }, |
| { |
| Name: "end", |
| Mode: 420, |
| Uid: 1000, |
| Gid: 1000, |
| Size: 4, |
| ModTime: time.Unix(1392398319, 0), |
| Typeflag: 0x30, |
| Linkname: "", |
| Uname: "david", |
| Gname: "david", |
| Devmajor: 0, |
| Devminor: 0, |
| }, |
| }, |
| chksums: []string{ |
| "6f53234398c2449fe67c1812d993012f", |
| "6f53234398c2449fe67c1812d993012f", |
| "6f53234398c2449fe67c1812d993012f", |
| "6f53234398c2449fe67c1812d993012f", |
| "b0061974914468de549a2af8ced10316", |
| }, |
| } |
| |
| var untarTests = []*untarTest{ |
| gnuTarTest, |
| sparseTarTest, |
| { |
| file: "testdata/star.tar", |
| headers: []*Header{ |
| { |
| Name: "small.txt", |
| Mode: 0640, |
| Uid: 73025, |
| Gid: 5000, |
| Size: 5, |
| ModTime: time.Unix(1244592783, 0), |
| Typeflag: '0', |
| Uname: "dsymonds", |
| Gname: "eng", |
| AccessTime: time.Unix(1244592783, 0), |
| ChangeTime: time.Unix(1244592783, 0), |
| }, |
| { |
| Name: "small2.txt", |
| Mode: 0640, |
| Uid: 73025, |
| Gid: 5000, |
| Size: 11, |
| ModTime: time.Unix(1244592783, 0), |
| Typeflag: '0', |
| Uname: "dsymonds", |
| Gname: "eng", |
| AccessTime: time.Unix(1244592783, 0), |
| ChangeTime: time.Unix(1244592783, 0), |
| }, |
| }, |
| }, |
| { |
| file: "testdata/v7.tar", |
| headers: []*Header{ |
| { |
| Name: "small.txt", |
| Mode: 0444, |
| Uid: 73025, |
| Gid: 5000, |
| Size: 5, |
| ModTime: time.Unix(1244593104, 0), |
| Typeflag: '\x00', |
| }, |
| { |
| Name: "small2.txt", |
| Mode: 0444, |
| Uid: 73025, |
| Gid: 5000, |
| Size: 11, |
| ModTime: time.Unix(1244593104, 0), |
| Typeflag: '\x00', |
| }, |
| }, |
| }, |
| { |
| file: "testdata/pax.tar", |
| headers: []*Header{ |
| { |
| Name: "a/123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100", |
| Mode: 0664, |
| Uid: 1000, |
| Gid: 1000, |
| Uname: "shane", |
| Gname: "shane", |
| Size: 7, |
| ModTime: time.Unix(1350244992, 23960108), |
| ChangeTime: time.Unix(1350244992, 23960108), |
| AccessTime: time.Unix(1350244992, 23960108), |
| Typeflag: TypeReg, |
| }, |
| { |
| Name: "a/b", |
| Mode: 0777, |
| Uid: 1000, |
| Gid: 1000, |
| Uname: "shane", |
| Gname: "shane", |
| Size: 0, |
| ModTime: time.Unix(1350266320, 910238425), |
| ChangeTime: time.Unix(1350266320, 910238425), |
| AccessTime: time.Unix(1350266320, 910238425), |
| Typeflag: TypeSymlink, |
| Linkname: "123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100", |
| }, |
| }, |
| }, |
| { |
| file: "testdata/nil-uid.tar", // golang.org/issue/5290 |
| headers: []*Header{ |
| { |
| Name: "P1050238.JPG.log", |
| Mode: 0664, |
| Uid: 0, |
| Gid: 0, |
| Size: 14, |
| ModTime: time.Unix(1365454838, 0), |
| Typeflag: TypeReg, |
| Linkname: "", |
| Uname: "eyefi", |
| Gname: "eyefi", |
| Devmajor: 0, |
| Devminor: 0, |
| }, |
| }, |
| }, |
| { |
| file: "testdata/xattrs.tar", |
| headers: []*Header{ |
| { |
| Name: "small.txt", |
| Mode: 0644, |
| Uid: 1000, |
| Gid: 10, |
| Size: 5, |
| ModTime: time.Unix(1386065770, 448252320), |
| Typeflag: '0', |
| Uname: "alex", |
| Gname: "wheel", |
| AccessTime: time.Unix(1389782991, 419875220), |
| ChangeTime: time.Unix(1389782956, 794414986), |
| Xattrs: map[string]string{ |
| "user.key": "value", |
| "user.key2": "value2", |
| // Interestingly, selinux encodes the terminating null inside the xattr |
| "security.selinux": "unconfined_u:object_r:default_t:s0\x00", |
| }, |
| }, |
| { |
| Name: "small2.txt", |
| Mode: 0644, |
| Uid: 1000, |
| Gid: 10, |
| Size: 11, |
| ModTime: time.Unix(1386065770, 449252304), |
| Typeflag: '0', |
| Uname: "alex", |
| Gname: "wheel", |
| AccessTime: time.Unix(1389782991, 419875220), |
| ChangeTime: time.Unix(1386065770, 449252304), |
| Xattrs: map[string]string{ |
| "security.selinux": "unconfined_u:object_r:default_t:s0\x00", |
| }, |
| }, |
| }, |
| }, |
| { |
| file: "testdata/neg-size.tar", |
| err: ErrHeader, |
| }, |
| { |
| file: "testdata/issue10968.tar", |
| err: ErrHeader, |
| }, |
| { |
| file: "testdata/issue11169.tar", |
| // TODO(dsnet): Currently the library does not detect that this file is |
| // malformed. Instead it incorrectly believes that file just ends. |
| // At least the library doesn't crash anymore. |
| // err: ErrHeader, |
| }, |
| { |
| file: "testdata/issue12435.tar", |
| // TODO(dsnet): Currently the library does not detect that this file is |
| // malformed. Instead, it incorrectly believes that file just ends. |
| // At least the library doesn't crash anymore. |
| // err: ErrHeader, |
| }, |
| } |
| |
| func TestReader(t *testing.T) { |
| for i, v := range untarTests { |
| f, err := os.Open(v.file) |
| if err != nil { |
| t.Errorf("file %s, test %d: unexpected error: %v", v.file, i, err) |
| continue |
| } |
| defer f.Close() |
| |
| // Capture all headers and checksums. |
| var ( |
| tr = NewReader(f) |
| hdrs []*Header |
| chksums []string |
| rdbuf = make([]byte, 8) |
| ) |
| for { |
| var hdr *Header |
| hdr, err = tr.Next() |
| if err != nil { |
| if err == io.EOF { |
| err = nil // Expected error |
| } |
| break |
| } |
| hdrs = append(hdrs, hdr) |
| |
| if v.chksums == nil { |
| continue |
| } |
| h := md5.New() |
| _, err = io.CopyBuffer(h, tr, rdbuf) // Effectively an incremental read |
| if err != nil { |
| break |
| } |
| chksums = append(chksums, fmt.Sprintf("%x", h.Sum(nil))) |
| } |
| |
| for j, hdr := range hdrs { |
| if j >= len(v.headers) { |
| t.Errorf("file %s, test %d, entry %d: unexpected header:\ngot %+v", |
| v.file, i, j, *hdr) |
| continue |
| } |
| if !reflect.DeepEqual(*hdr, *v.headers[j]) { |
| t.Errorf("file %s, test %d, entry %d: incorrect header:\ngot %+v\nwant %+v", |
| v.file, i, j, *hdr, *v.headers[j]) |
| } |
| } |
| if len(hdrs) != len(v.headers) { |
| t.Errorf("file %s, test %d: got %d headers, want %d headers", |
| v.file, i, len(hdrs), len(v.headers)) |
| } |
| |
| for j, sum := range chksums { |
| if j >= len(v.chksums) { |
| t.Errorf("file %s, test %d, entry %d: unexpected sum: got %s", |
| v.file, i, j, sum) |
| continue |
| } |
| if sum != v.chksums[j] { |
| t.Errorf("file %s, test %d, entry %d: incorrect checksum: got %s, want %s", |
| v.file, i, j, sum, v.chksums[j]) |
| } |
| } |
| |
| if err != v.err { |
| t.Errorf("file %s, test %d: unexpected error: got %v, want %v", |
| v.file, i, err, v.err) |
| } |
| f.Close() |
| } |
| } |
| |
| func TestPartialRead(t *testing.T) { |
| f, err := os.Open("testdata/gnu.tar") |
| if err != nil { |
| t.Fatalf("Unexpected error: %v", err) |
| } |
| defer f.Close() |
| |
| tr := NewReader(f) |
| |
| // Read the first four bytes; Next() should skip the last byte. |
| hdr, err := tr.Next() |
| if err != nil || hdr == nil { |
| t.Fatalf("Didn't get first file: %v", err) |
| } |
| buf := make([]byte, 4) |
| if _, err := io.ReadFull(tr, buf); err != nil { |
| t.Fatalf("Unexpected error: %v", err) |
| } |
| if expected := []byte("Kilt"); !bytes.Equal(buf, expected) { |
| t.Errorf("Contents = %v, want %v", buf, expected) |
| } |
| |
| // Second file |
| hdr, err = tr.Next() |
| if err != nil || hdr == nil { |
| t.Fatalf("Didn't get second file: %v", err) |
| } |
| buf = make([]byte, 6) |
| if _, err := io.ReadFull(tr, buf); err != nil { |
| t.Fatalf("Unexpected error: %v", err) |
| } |
| if expected := []byte("Google"); !bytes.Equal(buf, expected) { |
| t.Errorf("Contents = %v, want %v", buf, expected) |
| } |
| } |
| |
| func TestParsePAXHeader(t *testing.T) { |
| paxTests := [][3]string{ |
| {"a", "a=name", "10 a=name\n"}, // Test case involving multiple acceptable lengths |
| {"a", "a=name", "9 a=name\n"}, // Test case involving multiple acceptable length |
| {"mtime", "mtime=1350244992.023960108", "30 mtime=1350244992.023960108\n"}} |
| for _, test := range paxTests { |
| key, expected, raw := test[0], test[1], test[2] |
| reader := bytes.NewReader([]byte(raw)) |
| headers, err := parsePAX(reader) |
| if err != nil { |
| t.Errorf("Couldn't parse correctly formatted headers: %v", err) |
| continue |
| } |
| if strings.EqualFold(headers[key], expected) { |
| t.Errorf("mtime header incorrectly parsed: got %s, wanted %s", headers[key], expected) |
| continue |
| } |
| trailer := make([]byte, 100) |
| n, err := reader.Read(trailer) |
| if err != io.EOF || n != 0 { |
| t.Error("Buffer wasn't consumed") |
| } |
| } |
| badHeaderTests := [][]byte{ |
| []byte("3 somelongkey=\n"), |
| []byte("50 tooshort=\n"), |
| } |
| for _, test := range badHeaderTests { |
| if _, err := parsePAX(bytes.NewReader(test)); err != ErrHeader { |
| t.Fatal("Unexpected success when parsing bad header") |
| } |
| } |
| } |
| |
| func TestParsePAXTime(t *testing.T) { |
| // Some valid PAX time values |
| timestamps := map[string]time.Time{ |
| "1350244992.023960108": time.Unix(1350244992, 23960108), // The common case |
| "1350244992.02396010": time.Unix(1350244992, 23960100), // Lower precision value |
| "1350244992.0239601089": time.Unix(1350244992, 23960108), // Higher precision value |
| "1350244992": time.Unix(1350244992, 0), // Low precision value |
| } |
| for input, expected := range timestamps { |
| ts, err := parsePAXTime(input) |
| if err != nil { |
| t.Fatal(err) |
| } |
| if !ts.Equal(expected) { |
| t.Fatalf("Time parsing failure %s %s", ts, expected) |
| } |
| } |
| } |
| |
| func TestMergePAX(t *testing.T) { |
| hdr := new(Header) |
| // Test a string, integer, and time based value. |
| headers := map[string]string{ |
| "path": "a/b/c", |
| "uid": "1000", |
| "mtime": "1350244992.023960108", |
| } |
| err := mergePAX(hdr, headers) |
| if err != nil { |
| t.Fatal(err) |
| } |
| want := &Header{ |
| Name: "a/b/c", |
| Uid: 1000, |
| ModTime: time.Unix(1350244992, 23960108), |
| } |
| if !reflect.DeepEqual(hdr, want) { |
| t.Errorf("incorrect merge: got %+v, want %+v", hdr, want) |
| } |
| } |
| |
| func TestSparseFileReader(t *testing.T) { |
| var vectors = []struct { |
| realSize int64 // Real size of the output file |
| sparseMap []sparseEntry // Input sparse map |
| sparseData string // Input compact data |
| expected string // Expected output data |
| err error // Expected error outcome |
| }{{ |
| realSize: 8, |
| sparseMap: []sparseEntry{ |
| {offset: 0, numBytes: 2}, |
| {offset: 5, numBytes: 3}, |
| }, |
| sparseData: "abcde", |
| expected: "ab\x00\x00\x00cde", |
| }, { |
| realSize: 10, |
| sparseMap: []sparseEntry{ |
| {offset: 0, numBytes: 2}, |
| {offset: 5, numBytes: 3}, |
| }, |
| sparseData: "abcde", |
| expected: "ab\x00\x00\x00cde\x00\x00", |
| }, { |
| realSize: 8, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 6, numBytes: 2}, |
| }, |
| sparseData: "abcde", |
| expected: "\x00abc\x00\x00de", |
| }, { |
| realSize: 8, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 6, numBytes: 0}, |
| {offset: 6, numBytes: 0}, |
| {offset: 6, numBytes: 2}, |
| }, |
| sparseData: "abcde", |
| expected: "\x00abc\x00\x00de", |
| }, { |
| realSize: 10, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 6, numBytes: 2}, |
| }, |
| sparseData: "abcde", |
| expected: "\x00abc\x00\x00de\x00\x00", |
| }, { |
| realSize: 10, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 6, numBytes: 2}, |
| {offset: 8, numBytes: 0}, |
| {offset: 8, numBytes: 0}, |
| {offset: 8, numBytes: 0}, |
| {offset: 8, numBytes: 0}, |
| }, |
| sparseData: "abcde", |
| expected: "\x00abc\x00\x00de\x00\x00", |
| }, { |
| realSize: 2, |
| sparseMap: []sparseEntry{}, |
| sparseData: "", |
| expected: "\x00\x00", |
| }, { |
| realSize: -2, |
| sparseMap: []sparseEntry{}, |
| err: ErrHeader, |
| }, { |
| realSize: -10, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 6, numBytes: 2}, |
| }, |
| sparseData: "abcde", |
| err: ErrHeader, |
| }, { |
| realSize: 10, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 6, numBytes: 5}, |
| }, |
| sparseData: "abcde", |
| err: ErrHeader, |
| }, { |
| realSize: 35, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 6, numBytes: 5}, |
| }, |
| sparseData: "abcde", |
| err: io.ErrUnexpectedEOF, |
| }, { |
| realSize: 35, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 6, numBytes: -5}, |
| }, |
| sparseData: "abcde", |
| err: ErrHeader, |
| }, { |
| realSize: 35, |
| sparseMap: []sparseEntry{ |
| {offset: math.MaxInt64, numBytes: 3}, |
| {offset: 6, numBytes: -5}, |
| }, |
| sparseData: "abcde", |
| err: ErrHeader, |
| }, { |
| realSize: 10, |
| sparseMap: []sparseEntry{ |
| {offset: 1, numBytes: 3}, |
| {offset: 2, numBytes: 2}, |
| }, |
| sparseData: "abcde", |
| err: ErrHeader, |
| }} |
| |
| for i, v := range vectors { |
| r := bytes.NewReader([]byte(v.sparseData)) |
| rfr := ®FileReader{r: r, nb: int64(len(v.sparseData))} |
| |
| var sfr *sparseFileReader |
| var err error |
| var buf []byte |
| |
| sfr, err = newSparseFileReader(rfr, v.sparseMap, v.realSize) |
| if err != nil { |
| goto fail |
| } |
| if sfr.numBytes() != int64(len(v.sparseData)) { |
| t.Errorf("test %d, numBytes() before reading: got %d, want %d", i, sfr.numBytes(), len(v.sparseData)) |
| } |
| buf, err = ioutil.ReadAll(sfr) |
| if err != nil { |
| goto fail |
| } |
| if string(buf) != v.expected { |
| t.Errorf("test %d, ReadAll(): got %q, want %q", i, string(buf), v.expected) |
| } |
| if sfr.numBytes() != 0 { |
| t.Errorf("test %d, numBytes() after reading: got %d, want %d", i, sfr.numBytes(), 0) |
| } |
| |
| fail: |
| if err != v.err { |
| t.Errorf("test %d, unexpected error: got %v, want %v", i, err, v.err) |
| } |
| } |
| } |
| |
| func TestReadGNUSparseMap0x1(t *testing.T) { |
| const ( |
| maxUint = ^uint(0) |
| maxInt = int(maxUint >> 1) |
| ) |
| var ( |
| big1 = fmt.Sprintf("%d", int64(maxInt)) |
| big2 = fmt.Sprintf("%d", (int64(maxInt)/2)+1) |
| big3 = fmt.Sprintf("%d", (int64(maxInt) / 3)) |
| ) |
| |
| var vectors = []struct { |
| extHdrs map[string]string // Input data |
| sparseMap []sparseEntry // Expected sparse entries to be outputted |
| err error // Expected errors that may be raised |
| }{{ |
| extHdrs: map[string]string{paxGNUSparseNumBlocks: "-4"}, |
| err: ErrHeader, |
| }, { |
| extHdrs: map[string]string{paxGNUSparseNumBlocks: "fee "}, |
| err: ErrHeader, |
| }, { |
| extHdrs: map[string]string{ |
| paxGNUSparseNumBlocks: big1, |
| paxGNUSparseMap: "0,5,10,5,20,5,30,5", |
| }, |
| err: ErrHeader, |
| }, { |
| extHdrs: map[string]string{ |
| paxGNUSparseNumBlocks: big2, |
| paxGNUSparseMap: "0,5,10,5,20,5,30,5", |
| }, |
| err: ErrHeader, |
| }, { |
| extHdrs: map[string]string{ |
| paxGNUSparseNumBlocks: big3, |
| paxGNUSparseMap: "0,5,10,5,20,5,30,5", |
| }, |
| err: ErrHeader, |
| }, { |
| extHdrs: map[string]string{ |
| paxGNUSparseNumBlocks: "4", |
| paxGNUSparseMap: "0.5,5,10,5,20,5,30,5", |
| }, |
| err: ErrHeader, |
| }, { |
| extHdrs: map[string]string{ |
| paxGNUSparseNumBlocks: "4", |
| paxGNUSparseMap: "0,5.5,10,5,20,5,30,5", |
| }, |
| err: ErrHeader, |
| }, { |
| extHdrs: map[string]string{ |
| paxGNUSparseNumBlocks: "4", |
| paxGNUSparseMap: "0,fewafewa.5,fewafw,5,20,5,30,5", |
| }, |
| err: ErrHeader, |
| }, { |
| extHdrs: map[string]string{ |
| paxGNUSparseNumBlocks: "4", |
| paxGNUSparseMap: "0,5,10,5,20,5,30,5", |
| }, |
| sparseMap: []sparseEntry{{0, 5}, {10, 5}, {20, 5}, {30, 5}}, |
| }} |
| |
| for i, v := range vectors { |
| sp, err := readGNUSparseMap0x1(v.extHdrs) |
| if !reflect.DeepEqual(sp, v.sparseMap) && !(len(sp) == 0 && len(v.sparseMap) == 0) { |
| t.Errorf("test %d, readGNUSparseMap0x1(...): got %v, want %v", i, sp, v.sparseMap) |
| } |
| if err != v.err { |
| t.Errorf("test %d, unexpected error: got %v, want %v", i, err, v.err) |
| } |
| } |
| } |
| |
| func TestReadGNUSparseMap1x0(t *testing.T) { |
| // This test uses lots of holes so the sparse header takes up more than two blocks |
| numEntries := 100 |
| expected := make([]sparseEntry, 0, numEntries) |
| sparseMap := new(bytes.Buffer) |
| |
| fmt.Fprintf(sparseMap, "%d\n", numEntries) |
| for i := 0; i < numEntries; i++ { |
| offset := int64(2048 * i) |
| numBytes := int64(1024) |
| expected = append(expected, sparseEntry{offset: offset, numBytes: numBytes}) |
| fmt.Fprintf(sparseMap, "%d\n%d\n", offset, numBytes) |
| } |
| |
| // Make the header the smallest multiple of blockSize that fits the sparseMap |
| headerBlocks := (sparseMap.Len() + blockSize - 1) / blockSize |
| bufLen := blockSize * headerBlocks |
| buf := make([]byte, bufLen) |
| copy(buf, sparseMap.Bytes()) |
| |
| // Get an reader to read the sparse map |
| r := bytes.NewReader(buf) |
| |
| // Read the sparse map |
| sp, err := readGNUSparseMap1x0(r) |
| if err != nil { |
| t.Errorf("Unexpected error: %v", err) |
| } |
| if !reflect.DeepEqual(sp, expected) { |
| t.Errorf("Incorrect sparse map: got %v, wanted %v", sp, expected) |
| } |
| } |
| |
| func TestUninitializedRead(t *testing.T) { |
| test := gnuTarTest |
| f, err := os.Open(test.file) |
| if err != nil { |
| t.Fatalf("Unexpected error: %v", err) |
| } |
| defer f.Close() |
| |
| tr := NewReader(f) |
| _, err = tr.Read([]byte{}) |
| if err == nil || err != io.EOF { |
| t.Errorf("Unexpected error: %v, wanted %v", err, io.EOF) |
| } |
| |
| } |
| |
| type reader struct{ io.Reader } |
| type readSeeker struct{ io.ReadSeeker } |
| type readBadSeeker struct{ io.ReadSeeker } |
| |
| func (rbs *readBadSeeker) Seek(int64, int) (int64, error) { return 0, fmt.Errorf("illegal seek") } |
| |
| // TestReadTruncation test the ending condition on various truncated files and |
| // that truncated files are still detected even if the underlying io.Reader |
| // satisfies io.Seeker. |
| func TestReadTruncation(t *testing.T) { |
| 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 := ioutil.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) |
| trash := strings.Repeat("garbage ", 64) // Exactly 512 bytes |
| |
| var vectors = []struct { |
| input string // Input stream |
| cnt int // Expected number of headers read |
| err error // Expected error outcome |
| }{ |
| {"", 0, io.EOF}, // Empty file is a "valid" tar file |
| {data1[:511], 0, io.ErrUnexpectedEOF}, |
| {data1[:512], 1, io.ErrUnexpectedEOF}, |
| {data1[:1024], 1, io.EOF}, |
| {data1[:1536], 2, io.ErrUnexpectedEOF}, |
| {data1[:2048], 2, io.EOF}, |
| {data1, 2, io.EOF}, |
| {data1[:2048] + data2[:1536], 3, io.EOF}, |
| {data2[:511], 0, io.ErrUnexpectedEOF}, |
| {data2[:512], 1, io.ErrUnexpectedEOF}, |
| {data2[:1195], 1, io.ErrUnexpectedEOF}, |
| {data2[:1196], 1, io.EOF}, // Exact end of data and start of padding |
| {data2[:1200], 1, io.EOF}, |
| {data2[:1535], 1, io.EOF}, |
| {data2[:1536], 1, io.EOF}, // Exact end of padding |
| {data2[:1536] + trash[:1], 1, io.ErrUnexpectedEOF}, |
| {data2[:1536] + trash[:511], 1, io.ErrUnexpectedEOF}, |
| {data2[:1536] + trash, 1, ErrHeader}, |
| {data2[:2048], 1, io.EOF}, // Exactly 1 empty block |
| {data2[:2048] + trash[:1], 1, io.ErrUnexpectedEOF}, |
| {data2[:2048] + trash[:511], 1, io.ErrUnexpectedEOF}, |
| {data2[:2048] + trash, 1, ErrHeader}, |
| {data2[:2560], 1, io.EOF}, // Exactly 2 empty blocks (normal end-of-stream) |
| {data2[:2560] + trash[:1], 1, io.EOF}, |
| {data2[:2560] + trash[:511], 1, io.EOF}, |
| {data2[:2560] + trash, 1, io.EOF}, |
| {data2[:3072], 1, io.EOF}, |
| {pax, 0, io.EOF}, // PAX header without data is a "valid" tar file |
| {pax + trash[:1], 0, io.ErrUnexpectedEOF}, |
| {pax + trash[:511], 0, io.ErrUnexpectedEOF}, |
| {sparse[:511], 0, io.ErrUnexpectedEOF}, |
| // TODO(dsnet): This should pass, but currently fails. |
| // {sparse[:512], 0, io.ErrUnexpectedEOF}, |
| {sparse[:3584], 1, io.EOF}, |
| {sparse[:9200], 1, io.EOF}, // Terminate in padding of sparse header |
| {sparse[:9216], 1, io.EOF}, |
| {sparse[:9728], 2, io.ErrUnexpectedEOF}, |
| {sparse[:10240], 2, io.EOF}, |
| {sparse[:11264], 2, io.ErrUnexpectedEOF}, |
| {sparse, 5, io.EOF}, |
| {sparse + trash, 5, io.EOF}, |
| } |
| |
| for i, v := range vectors { |
| for j := 0; j < 6; j++ { |
| var tr *Reader |
| var s1, s2 string |
| |
| switch j { |
| case 0: |
| tr = NewReader(&reader{strings.NewReader(v.input)}) |
| s1, s2 = "io.Reader", "auto" |
| case 1: |
| tr = NewReader(&reader{strings.NewReader(v.input)}) |
| s1, s2 = "io.Reader", "manual" |
| case 2: |
| tr = NewReader(&readSeeker{strings.NewReader(v.input)}) |
| s1, s2 = "io.ReadSeeker", "auto" |
| case 3: |
| tr = NewReader(&readSeeker{strings.NewReader(v.input)}) |
| s1, s2 = "io.ReadSeeker", "manual" |
| case 4: |
| tr = NewReader(&readBadSeeker{strings.NewReader(v.input)}) |
| s1, s2 = "ReadBadSeeker", "auto" |
| case 5: |
| tr = NewReader(&readBadSeeker{strings.NewReader(v.input)}) |
| s1, s2 = "ReadBadSeeker", "manual" |
| } |
| |
| var cnt int |
| var err error |
| for { |
| if _, err = tr.Next(); err != nil { |
| break |
| } |
| cnt++ |
| if s2 == "manual" { |
| if _, err = io.Copy(ioutil.Discard, tr); err != nil { |
| break |
| } |
| } |
| } |
| if err != v.err { |
| t.Errorf("test %d, NewReader(%s(...)) with %s discard: got %v, want %v", |
| i, s1, s2, err, v.err) |
| } |
| if cnt != v.cnt { |
| t.Errorf("test %d, NewReader(%s(...)) with %s discard: got %d headers, want %d headers", |
| i, s1, s2, cnt, v.cnt) |
| } |
| } |
| } |
| } |
