1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
//===- llvm/unittest/Support/TarWriterTest.cpp ----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/TarWriter.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Testing/Support/SupportHelpers.h"
#include "gtest/gtest.h"
#include <vector>
using namespace llvm;
using llvm::unittest::TempFile;
namespace {
struct UstarHeader {
char Name[100];
char Mode[8];
char Uid[8];
char Gid[8];
char Size[12];
char Mtime[12];
char Checksum[8];
char TypeFlag;
char Linkname[100];
char Magic[6];
char Version[2];
char Uname[32];
char Gname[32];
char DevMajor[8];
char DevMinor[8];
char Prefix[155];
char Pad[12];
};
class TarWriterTest : public ::testing::Test {};
static std::vector<uint8_t> createTar(StringRef Base, StringRef Filename) {
TempFile TarWriterTest("TarWriterTest", "tar", "", /*Unique*/ true);
// Create a tar file.
Expected<std::unique_ptr<TarWriter>> TarOrErr =
TarWriter::create(TarWriterTest.path(), Base);
EXPECT_TRUE((bool)TarOrErr);
std::unique_ptr<TarWriter> Tar = std::move(*TarOrErr);
Tar->append(Filename, "contents");
Tar.reset();
// Read the tar file.
ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr =
MemoryBuffer::getFile(TarWriterTest.path());
EXPECT_TRUE((bool)MBOrErr);
std::unique_ptr<MemoryBuffer> MB = std::move(*MBOrErr);
std::vector<uint8_t> Buf((const uint8_t *)MB->getBufferStart(),
(const uint8_t *)MB->getBufferEnd());
// Windows does not allow us to remove a mmap'ed files, so
// unmap first and then remove the temporary file.
MB = nullptr;
return Buf;
}
static UstarHeader createUstar(StringRef Base, StringRef Filename) {
std::vector<uint8_t> Buf = createTar(Base, Filename);
EXPECT_TRUE(Buf.size() >= sizeof(UstarHeader));
return *reinterpret_cast<const UstarHeader *>(Buf.data());
}
TEST_F(TarWriterTest, Basics) {
UstarHeader Hdr = createUstar("base", "file");
EXPECT_EQ("ustar", StringRef(Hdr.Magic));
EXPECT_EQ("00", StringRef(Hdr.Version, 2));
EXPECT_EQ("base/file", StringRef(Hdr.Name));
EXPECT_EQ("00000000010", StringRef(Hdr.Size));
}
TEST_F(TarWriterTest, LongFilename) {
// The prefix is prefixed by an additional '/' so it's one longer than the
// number of x's here.
std::string x136(136, 'x');
std::string x137(137, 'x');
std::string y99(99, 'y');
std::string y100(100, 'y');
UstarHeader Hdr1 = createUstar("", x136 + "/" + y99);
EXPECT_EQ("/" + x136, StringRef(Hdr1.Prefix));
EXPECT_EQ(y99, StringRef(Hdr1.Name));
UstarHeader Hdr2 = createUstar("", x137 + "/" + y99);
EXPECT_EQ("", StringRef(Hdr2.Prefix));
EXPECT_EQ("", StringRef(Hdr2.Name));
UstarHeader Hdr3 = createUstar("", x136 + "/" + y100);
EXPECT_EQ("", StringRef(Hdr3.Prefix));
EXPECT_EQ("", StringRef(Hdr3.Name));
UstarHeader Hdr4 = createUstar("", x137 + "/" + y100);
EXPECT_EQ("", StringRef(Hdr4.Prefix));
EXPECT_EQ("", StringRef(Hdr4.Name));
std::string yz = "yyyyyyyyyyyyyyyyyyyy/zzzzzzzzzzzzzzzzzzzz";
UstarHeader Hdr5 = createUstar("", x136 + "/" + yz);
EXPECT_EQ("/" + x136, StringRef(Hdr5.Prefix));
EXPECT_EQ(yz, StringRef(Hdr5.Name));
}
TEST_F(TarWriterTest, Pax) {
std::vector<uint8_t> Buf = createTar("", std::string(200, 'x'));
EXPECT_TRUE(Buf.size() >= 1024);
auto *Hdr = reinterpret_cast<const UstarHeader *>(Buf.data());
EXPECT_EQ("", StringRef(Hdr->Prefix));
EXPECT_EQ("", StringRef(Hdr->Name));
StringRef Pax = StringRef((char *)(Buf.data() + 512), 512);
EXPECT_TRUE(Pax.startswith("211 path=/" + std::string(200, 'x')));
}
TEST_F(TarWriterTest, SingleFile) {
TempFile TarWriterTest("TarWriterTest", "tar", "", /*Unique*/ true);
Expected<std::unique_ptr<TarWriter>> TarOrErr =
TarWriter::create(TarWriterTest.path(), "");
EXPECT_TRUE((bool)TarOrErr);
std::unique_ptr<TarWriter> Tar = std::move(*TarOrErr);
Tar->append("FooPath", "foo");
Tar.reset();
uint64_t TarSize;
std::error_code EC = sys::fs::file_size(TarWriterTest.path(), TarSize);
EXPECT_FALSE((bool)EC);
EXPECT_EQ(TarSize, 2048ULL);
}
TEST_F(TarWriterTest, NoDuplicate) {
TempFile TarWriterTest("TarWriterTest", "tar", "", /*Unique*/ true);
Expected<std::unique_ptr<TarWriter>> TarOrErr =
TarWriter::create(TarWriterTest.path(), "");
EXPECT_TRUE((bool)TarOrErr);
std::unique_ptr<TarWriter> Tar = std::move(*TarOrErr);
Tar->append("FooPath", "foo");
Tar->append("BarPath", "bar");
Tar.reset();
uint64_t TarSize;
std::error_code EC = sys::fs::file_size(TarWriterTest.path(), TarSize);
EXPECT_FALSE((bool)EC);
EXPECT_EQ(TarSize, 3072ULL);
}
TEST_F(TarWriterTest, Duplicate) {
TempFile TarWriterTest("TarWriterTest", "tar", "", /*Unique*/ true);
Expected<std::unique_ptr<TarWriter>> TarOrErr =
TarWriter::create(TarWriterTest.path(), "");
EXPECT_TRUE((bool)TarOrErr);
std::unique_ptr<TarWriter> Tar = std::move(*TarOrErr);
Tar->append("FooPath", "foo");
Tar->append("FooPath", "bar");
Tar.reset();
uint64_t TarSize;
std::error_code EC = sys::fs::file_size(TarWriterTest.path(), TarSize);
EXPECT_FALSE((bool)EC);
EXPECT_EQ(TarSize, 2048ULL);
}
} // namespace
|
