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 <map>
18 #include <string>
19
20 #include <stdio.h>
21 #include <unistd.h>
22
23 #include <android-base/stringprintf.h>
24
25 #include "minzip/Zip.h"
26 #include "config.h"
27 #include "ota_io.h"
28
29 #define OTAIO_MAX_FNAME_SIZE 128
30
31 static ZipArchive* archive;
32 static std::map<std::string, bool> should_inject_cache;
33
get_type_path(const char * io_type)34 static std::string get_type_path(const char* io_type) {
35 return android::base::StringPrintf("%s/%s", OTAIO_BASE_DIR, io_type);
36 }
37
ota_io_init(ZipArchive * za)38 void ota_io_init(ZipArchive* za) {
39 archive = za;
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 == NULL) {
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 const ZipEntry* entry = mzFindZipEntry(archive, type_path.c_str());
54 should_inject_cache[type_path] = entry != nullptr;
55 return entry != NULL;
56 }
57
should_hit_cache()58 bool should_hit_cache() {
59 return should_fault_inject(OTAIO_CACHE);
60 }
61
fault_fname(const char * io_type)62 std::string fault_fname(const char* io_type) {
63 std::string type_path = get_type_path(io_type);
64 std::string fname;
65 fname.resize(OTAIO_MAX_FNAME_SIZE);
66 const ZipEntry* entry = mzFindZipEntry(archive, type_path.c_str());
67 mzReadZipEntry(archive, entry, &fname[0], OTAIO_MAX_FNAME_SIZE);
68 return fname;
69 }
70