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