1 /* 2 * Copyright (C) 2009 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 "updater/updater.h" 18 19 #include <stdio.h> 20 #include <unistd.h> 21 #include <stdlib.h> 22 #include <string.h> 23 24 #include <string> 25 26 #include <android-base/logging.h> 27 #include <android-base/strings.h> 28 #include <selinux/android.h> 29 #include <selinux/label.h> 30 #include <selinux/selinux.h> 31 #include <ziparchive/zip_archive.h> 32 33 #include "edify/expr.h" 34 #include "otafault/config.h" 35 #include "otautil/DirUtil.h" 36 #include "otautil/SysUtil.h" 37 #include "otautil/cache_location.h" 38 #include "otautil/error_code.h" 39 #include "updater/blockimg.h" 40 #include "updater/install.h" 41 42 // Generated by the makefile, this function defines the 43 // RegisterDeviceExtensions() function, which calls all the 44 // registration functions for device-specific extensions. 45 #include "register.inc" 46 47 // Where in the package we expect to find the edify script to execute. 48 // (Note it's "updateR-script", not the older "update-script".) 49 static constexpr const char* SCRIPT_NAME = "META-INF/com/google/android/updater-script"; 50 51 extern bool have_eio_error; 52 53 struct selabel_handle *sehandle; 54 55 static void UpdaterLogger(android::base::LogId /* id */, android::base::LogSeverity /* severity */, 56 const char* /* tag */, const char* /* file */, unsigned int /* line */, 57 const char* message) { 58 fprintf(stdout, "%s\n", message); 59 } 60 61 int main(int argc, char** argv) { 62 // Various things log information to stdout or stderr more or less 63 // at random (though we've tried to standardize on stdout). The 64 // log file makes more sense if buffering is turned off so things 65 // appear in the right order. 66 setbuf(stdout, nullptr); 67 setbuf(stderr, nullptr); 68 69 // We don't have logcat yet under recovery. Update logs will always be written to stdout 70 // (which is redirected to recovery.log). 71 android::base::InitLogging(argv, &UpdaterLogger); 72 73 if (argc != 4 && argc != 5) { 74 LOG(ERROR) << "unexpected number of arguments: " << argc; 75 return 1; 76 } 77 78 char* version = argv[1]; 79 if ((version[0] != '1' && version[0] != '2' && version[0] != '3') || version[1] != '\0') { 80 // We support version 1, 2, or 3. 81 LOG(ERROR) << "wrong updater binary API; expected 1, 2, or 3; got " << argv[1]; 82 return 2; 83 } 84 85 // Set up the pipe for sending commands back to the parent process. 86 87 int fd = atoi(argv[2]); 88 FILE* cmd_pipe = fdopen(fd, "wb"); 89 setlinebuf(cmd_pipe); 90 91 // Extract the script from the package. 92 93 const char* package_filename = argv[3]; 94 MemMapping map; 95 if (!map.MapFile(package_filename)) { 96 LOG(ERROR) << "failed to map package " << argv[3]; 97 return 3; 98 } 99 ZipArchiveHandle za; 100 int open_err = OpenArchiveFromMemory(map.addr, map.length, argv[3], &za); 101 if (open_err != 0) { 102 LOG(ERROR) << "failed to open package " << argv[3] << ": " << ErrorCodeString(open_err); 103 CloseArchive(za); 104 return 3; 105 } 106 107 ZipString script_name(SCRIPT_NAME); 108 ZipEntry script_entry; 109 int find_err = FindEntry(za, script_name, &script_entry); 110 if (find_err != 0) { 111 LOG(ERROR) << "failed to find " << SCRIPT_NAME << " in " << package_filename << ": " 112 << ErrorCodeString(find_err); 113 CloseArchive(za); 114 return 4; 115 } 116 117 std::string script; 118 script.resize(script_entry.uncompressed_length); 119 int extract_err = ExtractToMemory(za, &script_entry, reinterpret_cast<uint8_t*>(&script[0]), 120 script_entry.uncompressed_length); 121 if (extract_err != 0) { 122 LOG(ERROR) << "failed to read script from package: " << ErrorCodeString(extract_err); 123 CloseArchive(za); 124 return 5; 125 } 126 127 // Configure edify's functions. 128 129 RegisterBuiltins(); 130 RegisterInstallFunctions(); 131 RegisterBlockImageFunctions(); 132 RegisterDeviceExtensions(); 133 134 // Parse the script. 135 136 std::unique_ptr<Expr> root; 137 int error_count = 0; 138 int error = parse_string(script.c_str(), &root, &error_count); 139 if (error != 0 || error_count > 0) { 140 LOG(ERROR) << error_count << " parse errors"; 141 CloseArchive(za); 142 return 6; 143 } 144 145 sehandle = selinux_android_file_context_handle(); 146 selinux_android_set_sehandle(sehandle); 147 148 if (!sehandle) { 149 fprintf(cmd_pipe, "ui_print Warning: No file_contexts\n"); 150 } 151 152 // Evaluate the parsed script. 153 154 UpdaterInfo updater_info; 155 updater_info.cmd_pipe = cmd_pipe; 156 updater_info.package_zip = za; 157 updater_info.version = atoi(version); 158 updater_info.package_zip_addr = map.addr; 159 updater_info.package_zip_len = map.length; 160 161 State state(script, &updater_info); 162 163 if (argc == 5) { 164 if (strcmp(argv[4], "retry") == 0) { 165 state.is_retry = true; 166 } else { 167 printf("unexpected argument: %s", argv[4]); 168 } 169 } 170 ota_io_init(za, state.is_retry); 171 172 std::string result; 173 bool status = Evaluate(&state, root, &result); 174 175 if (have_eio_error) { 176 fprintf(cmd_pipe, "retry_update\n"); 177 } 178 179 if (!status) { 180 if (state.errmsg.empty()) { 181 LOG(ERROR) << "script aborted (no error message)"; 182 fprintf(cmd_pipe, "ui_print script aborted (no error message)\n"); 183 } else { 184 LOG(ERROR) << "script aborted: " << state.errmsg; 185 const std::vector<std::string> lines = android::base::Split(state.errmsg, "\n"); 186 for (const std::string& line : lines) { 187 // Parse the error code in abort message. 188 // Example: "E30: This package is for bullhead devices." 189 if (!line.empty() && line[0] == 'E') { 190 if (sscanf(line.c_str(), "E%d: ", &state.error_code) != 1) { 191 LOG(ERROR) << "Failed to parse error code: [" << line << "]"; 192 } 193 } 194 fprintf(cmd_pipe, "ui_print %s\n", line.c_str()); 195 } 196 } 197 198 // Installation has been aborted. Set the error code to kScriptExecutionFailure unless 199 // a more specific code has been set in errmsg. 200 if (state.error_code == kNoError) { 201 state.error_code = kScriptExecutionFailure; 202 } 203 fprintf(cmd_pipe, "log error: %d\n", state.error_code); 204 // Cause code should provide additional information about the abort. 205 if (state.cause_code != kNoCause) { 206 fprintf(cmd_pipe, "log cause: %d\n", state.cause_code); 207 if (state.cause_code == kPatchApplicationFailure) { 208 LOG(INFO) << "Patch application failed, retry update."; 209 fprintf(cmd_pipe, "retry_update\n"); 210 } 211 } 212 213 if (updater_info.package_zip) { 214 CloseArchive(updater_info.package_zip); 215 } 216 return 7; 217 } else { 218 fprintf(cmd_pipe, "ui_print script succeeded: result was [%s]\n", result.c_str()); 219 } 220 221 if (updater_info.package_zip) { 222 CloseArchive(updater_info.package_zip); 223 } 224 225 return 0; 226 } 227
