1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <errno.h>
18 #include <stdio.h>
19 #include <stdlib.h>
20
21 #include <algorithm>
22 #include <string>
23 #include <vector>
24
25 #include <ziparchive/zip_archive.h>
26 #include <ziparchive/zip_archive_stream_entry.h>
27 #include <ziparchive/zip_writer.h>
28
usage()29 static void usage() {
30 fprintf(stderr, "usage: bionic_tests_zipalign ALIGNMENT INPUT_ZIP_FILE OUTPUT_ZIP_FILE\n");
31 fprintf(stderr, " ALIGNMENT:\n");
32 fprintf(stderr, " The new alignment of all entries in the new zip file.\n");
33 fprintf(stderr, " INPUT_ZIP_FILE:\n");
34 fprintf(stderr, " The input zip file that will be read but left unmodified.\n");
35 fprintf(stderr, " OUTPUT_ZIP_FILE:\n");
36 fprintf(stderr, " The output zip file that will be created from the input file.\n");
37 }
38
39 typedef std::pair<ZipEntry*, ZipString*> ZipData;
40
GetEntries(ZipArchiveHandle handle,std::vector<ZipData> * entries)41 static bool GetEntries(ZipArchiveHandle handle, std::vector<ZipData>* entries) {
42 void* cookie;
43 int32_t return_value = StartIteration(handle, &cookie, nullptr, nullptr);
44 if (return_value != 0) {
45 fprintf(stderr, "Unable to iterate over entries: %s\n", ErrorCodeString(return_value));
46 return false;
47 }
48
49 ZipEntry entry;
50 ZipString name;
51 while ((return_value = Next(cookie, &entry, &name)) == 0) {
52 entries->push_back(std::make_pair(new ZipEntry(entry), new ZipString(name)));
53 }
54 if (return_value != -1) {
55 fprintf(stderr, "Error while iterating over zip entries: %s\n", ErrorCodeString(return_value));
56 } else {
57 // Sort by offset.
58 std::sort(entries->begin(), entries->end(),
59 [](ZipData a, ZipData b) { return a.first->offset < b.first->offset; });
60 }
61
62 EndIteration(cookie);
63 return return_value == -1;
64 }
65
CreateAlignedZip(ZipArchiveHandle & handle,FILE * zip_dst,uint32_t alignment)66 static bool CreateAlignedZip(ZipArchiveHandle& handle, FILE* zip_dst, uint32_t alignment) {
67 std::vector<ZipData> entries;
68 // We will not free the memory created in entries since the program
69 // terminates right after this function is called.
70 if (!GetEntries(handle, &entries)) {
71 return false;
72 }
73
74 ZipWriter writer(zip_dst);
75
76 int32_t error;
77 for (auto& entry : entries) {
78 ZipEntry* zip_entry = entry.first;
79 ZipString* zip_str = entry.second;
80
81 size_t flags = 0;
82 if ((zip_entry->method & kCompressDeflated) != 0) {
83 flags |= ZipWriter::kCompress;
84 }
85 std::string zip_name(reinterpret_cast<const char*>(zip_str->name), zip_str->name_length);
86 error = writer.StartAlignedEntry(zip_name.c_str(), flags, alignment);
87 if (error != 0) {
88 fprintf(stderr, "StartAlignedEntry failed: %s\n", ZipWriter::ErrorCodeString(error));
89 return false;
90 }
91 std::unique_ptr<ZipArchiveStreamEntry> stream(
92 ZipArchiveStreamEntry::Create(handle, *zip_entry));
93 const std::vector<uint8_t>* data;
94 while ((data = stream->Read()) != nullptr) {
95 error = writer.WriteBytes(data->data(), data->size());
96 if (error != 0) {
97 fprintf(stderr, "WriteBytes failed: %s\n", ZipWriter::ErrorCodeString(error));
98 return false;
99 }
100 }
101 if (!stream->Verify()) {
102 fprintf(stderr, "Failed to verify zip stream writer entry.\n");
103 return false;
104 }
105 error = writer.FinishEntry();
106 if (error != 0) {
107 fprintf(stderr, "FinishEntry failed: %s\n", ZipWriter::ErrorCodeString(error));
108 }
109 }
110
111 error = writer.Finish();
112 if (error != 0) {
113 fprintf(stderr, "Finish failed: %s\n", ZipWriter::ErrorCodeString(error));
114 return false;
115 }
116 return true;
117 }
118
main(int argc,char * argv[])119 int main(int argc, char* argv[]) {
120 if (argc != 4) {
121 usage();
122 return 1;
123 }
124
125 char* end;
126 unsigned long int alignment = strtoul(argv[1], &end, 10);
127 if ((alignment == ULONG_MAX && errno == ERANGE) || *end != '\0') {
128 fprintf(stderr, "ALIGNMENT value is not a valid number: %s\n", argv[1]);
129 usage();
130 return 1;
131 }
132 if (((alignment - 1) & alignment) != 0) {
133 fprintf(stderr, "ALIGNMENT value is not a power of 2: %s\n", argv[1]);
134 return 1;
135 }
136
137 ZipArchiveHandle handle;
138
139 int32_t return_value = OpenArchive(argv[2], &handle);
140 if (return_value != 0) {
141 CloseArchive(handle);
142 fprintf(stderr, "Unable to open '%s': %s\n", argv[2], ErrorCodeString(return_value));
143 return false;
144 }
145
146 FILE* zip_dst = fopen(argv[3], "we");
147 if (zip_dst == nullptr) {
148 fprintf(stderr, "Unable to create '%s': %s\n", argv[3], strerror(errno));
149 return 1;
150 }
151
152 bool success = CreateAlignedZip(handle, zip_dst, static_cast<uint32_t>(alignment));
153
154 CloseArchive(handle);
155 fclose(zip_dst);
156
157 return success ? 0 : 1;
158 }
159