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 "otafault/config.h"
18
19 #include <map>
20 #include <string>
21
22 #include <android-base/stringprintf.h>
23 #include <ziparchive/zip_archive.h>
24
25 #include "otafault/ota_io.h"
26
27 #define OTAIO_MAX_FNAME_SIZE 128
28
29 static ZipArchiveHandle archive;
30 static bool is_retry = false;
31 static std::map<std::string, bool> should_inject_cache;
32
get_type_path(const char * io_type)33 static std::string get_type_path(const char* io_type) {
34 return android::base::StringPrintf("%s/%s", OTAIO_BASE_DIR, io_type);
35 }
36
ota_io_init(ZipArchiveHandle za,bool retry)37 void ota_io_init(ZipArchiveHandle za, bool retry) {
38 archive = za;
39 is_retry = retry;
40 ota_set_fault_files();
41 }
42
should_fault_inject(const char * io_type)43 bool should_fault_inject(const char* io_type) {
44 // archive will be NULL if we used an entry point other
45 // than updater/updater.cpp:main
46 if (archive == nullptr || is_retry) {
47 return false;
48 }
49 const std::string type_path = get_type_path(io_type);
50 if (should_inject_cache.find(type_path) != should_inject_cache.end()) {
51 return should_inject_cache[type_path];
52 }
53 ZipString zip_type_path(type_path.c_str());
54 ZipEntry entry;
55 int status = FindEntry(archive, zip_type_path, &entry);
56 should_inject_cache[type_path] = (status == 0);
57 return (status == 0);
58 }
59
should_hit_cache()60 bool should_hit_cache() {
61 return should_fault_inject(OTAIO_CACHE);
62 }
63
fault_fname(const char * io_type)64 std::string fault_fname(const char* io_type) {
65 std::string type_path = get_type_path(io_type);
66 std::string fname;
67 fname.resize(OTAIO_MAX_FNAME_SIZE);
68 ZipString zip_type_path(type_path.c_str());
69 ZipEntry entry;
70 if (FindEntry(archive, zip_type_path, &entry) != 0) {
71 return {};
72 }
73 ExtractToMemory(archive, &entry, reinterpret_cast<uint8_t*>(&fname[0]), OTAIO_MAX_FNAME_SIZE);
74 return fname;
75 }
76