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Doug Zongker9931f7f2009-06-10 14:11:53 -07001/*
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 <stdio.h>
18#include <unistd.h>
19#include <stdlib.h>
Elliott Hughescd3c55a2015-01-29 20:50:08 -080020#include <string.h>
Doug Zongker9931f7f2009-06-10 14:11:53 -070021
22#include "edify/expr.h"
23#include "updater.h"
24#include "install.h"
Doug Zongkerbc7ffed2014-08-15 14:31:52 -070025#include "blockimg.h"
Doug Zongker9931f7f2009-06-10 14:11:53 -070026#include "minzip/Zip.h"
Doug Zongker99916f02014-01-13 14:16:58 -080027#include "minzip/SysUtil.h"
Jed Estep39c1b5e2015-12-15 16:04:53 -080028#include "config.h"
Doug Zongker9931f7f2009-06-10 14:11:53 -070029
Doug Zongker2b0fdc62009-06-19 11:22:06 -070030// Generated by the makefile, this function defines the
31// RegisterDeviceExtensions() function, which calls all the
32// registration functions for device-specific extensions.
33#include "register.inc"
34
Doug Zongker9931f7f2009-06-10 14:11:53 -070035// Where in the package we expect to find the edify script to execute.
36// (Note it's "updateR-script", not the older "update-script".)
37#define SCRIPT_NAME "META-INF/com/google/android/updater-script"
38
Stephen Smalley779701d2012-02-09 14:13:23 -050039struct selabel_handle *sehandle;
40
Doug Zongker9931f7f2009-06-10 14:11:53 -070041int main(int argc, char** argv) {
Doug Zongker512536a2010-02-17 16:11:44 -080042 // Various things log information to stdout or stderr more or less
Doug Zongkerfafc85b2013-07-09 12:29:45 -070043 // at random (though we've tried to standardize on stdout). The
44 // log file makes more sense if buffering is turned off so things
45 // appear in the right order.
Doug Zongker512536a2010-02-17 16:11:44 -080046 setbuf(stdout, NULL);
47 setbuf(stderr, NULL);
48
Doug Zongker9931f7f2009-06-10 14:11:53 -070049 if (argc != 4) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -070050 printf("unexpected number of arguments (%d)\n", argc);
Doug Zongker9931f7f2009-06-10 14:11:53 -070051 return 1;
52 }
53
54 char* version = argv[1];
Doug Zongkere08991e2010-02-02 13:09:52 -080055 if ((version[0] != '1' && version[0] != '2' && version[0] != '3') ||
56 version[1] != '\0') {
57 // We support version 1, 2, or 3.
Doug Zongkerfafc85b2013-07-09 12:29:45 -070058 printf("wrong updater binary API; expected 1, 2, or 3; "
Doug Zongkere08991e2010-02-02 13:09:52 -080059 "got %s\n",
Doug Zongkerfb2e3af2009-06-17 17:29:40 -070060 argv[1]);
Doug Zongker9931f7f2009-06-10 14:11:53 -070061 return 2;
62 }
63
64 // Set up the pipe for sending commands back to the parent process.
65
66 int fd = atoi(argv[2]);
67 FILE* cmd_pipe = fdopen(fd, "wb");
68 setlinebuf(cmd_pipe);
69
70 // Extract the script from the package.
71
Doug Zongker99916f02014-01-13 14:16:58 -080072 const char* package_filename = argv[3];
73 MemMapping map;
74 if (sysMapFile(package_filename, &map) != 0) {
75 printf("failed to map package %s\n", argv[3]);
76 return 3;
77 }
Doug Zongker9931f7f2009-06-10 14:11:53 -070078 ZipArchive za;
79 int err;
Doug Zongker99916f02014-01-13 14:16:58 -080080 err = mzOpenZipArchive(map.addr, map.length, &za);
Doug Zongker9931f7f2009-06-10 14:11:53 -070081 if (err != 0) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -070082 printf("failed to open package %s: %s\n",
Doug Zongker99916f02014-01-13 14:16:58 -080083 argv[3], strerror(err));
Doug Zongker9931f7f2009-06-10 14:11:53 -070084 return 3;
85 }
Jed Estep39c1b5e2015-12-15 16:04:53 -080086 ota_io_init(&za);
Doug Zongker9931f7f2009-06-10 14:11:53 -070087
88 const ZipEntry* script_entry = mzFindZipEntry(&za, SCRIPT_NAME);
89 if (script_entry == NULL) {
Doug Zongker99916f02014-01-13 14:16:58 -080090 printf("failed to find %s in %s\n", SCRIPT_NAME, package_filename);
Doug Zongker9931f7f2009-06-10 14:11:53 -070091 return 4;
92 }
93
Tao Baoba9a42a2015-06-23 23:23:33 -070094 char* script = reinterpret_cast<char*>(malloc(script_entry->uncompLen+1));
Doug Zongker9931f7f2009-06-10 14:11:53 -070095 if (!mzReadZipEntry(&za, script_entry, script, script_entry->uncompLen)) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -070096 printf("failed to read script from package\n");
Doug Zongker9931f7f2009-06-10 14:11:53 -070097 return 5;
98 }
99 script[script_entry->uncompLen] = '\0';
100
101 // Configure edify's functions.
102
103 RegisterBuiltins();
104 RegisterInstallFunctions();
Doug Zongkerbc7ffed2014-08-15 14:31:52 -0700105 RegisterBlockImageFunctions();
Doug Zongker2b0fdc62009-06-19 11:22:06 -0700106 RegisterDeviceExtensions();
Doug Zongker9931f7f2009-06-10 14:11:53 -0700107 FinishRegistration();
108
109 // Parse the script.
110
111 Expr* root;
Doug Zongker8edb00c2009-06-11 17:21:44 -0700112 int error_count = 0;
Doug Zongker0d32f252014-02-13 15:07:56 -0800113 int error = parse_string(script, &root, &error_count);
Doug Zongker8edb00c2009-06-11 17:21:44 -0700114 if (error != 0 || error_count > 0) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700115 printf("%d parse errors\n", error_count);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700116 return 6;
117 }
118
Stephen Smalley779701d2012-02-09 14:13:23 -0500119 struct selinux_opt seopts[] = {
120 { SELABEL_OPT_PATH, "/file_contexts" }
121 };
122
123 sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1);
124
125 if (!sehandle) {
Stephen Smalley779701d2012-02-09 14:13:23 -0500126 fprintf(cmd_pipe, "ui_print Warning: No file_contexts\n");
127 }
Stephen Smalley779701d2012-02-09 14:13:23 -0500128
Doug Zongker9931f7f2009-06-10 14:11:53 -0700129 // Evaluate the parsed script.
130
131 UpdaterInfo updater_info;
132 updater_info.cmd_pipe = cmd_pipe;
133 updater_info.package_zip = &za;
Doug Zongkere08991e2010-02-02 13:09:52 -0800134 updater_info.version = atoi(version);
Doug Zongkerbc7ffed2014-08-15 14:31:52 -0700135 updater_info.package_zip_addr = map.addr;
136 updater_info.package_zip_len = map.length;
Doug Zongker9931f7f2009-06-10 14:11:53 -0700137
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700138 State state;
139 state.cookie = &updater_info;
140 state.script = script;
141 state.errmsg = NULL;
142
143 char* result = Evaluate(&state, root);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700144 if (result == NULL) {
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700145 if (state.errmsg == NULL) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700146 printf("script aborted (no error message)\n");
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700147 fprintf(cmd_pipe, "ui_print script aborted (no error message)\n");
148 } else {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700149 printf("script aborted: %s\n", state.errmsg);
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700150 char* line = strtok(state.errmsg, "\n");
151 while (line) {
152 fprintf(cmd_pipe, "ui_print %s\n", line);
153 line = strtok(NULL, "\n");
154 }
155 fprintf(cmd_pipe, "ui_print\n");
156 }
157 free(state.errmsg);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700158 return 7;
159 } else {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700160 fprintf(cmd_pipe, "ui_print script succeeded: result was [%s]\n", result);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700161 free(result);
162 }
163
Doug Zongker8e5e4da2010-09-14 18:06:55 -0700164 if (updater_info.package_zip) {
165 mzCloseZipArchive(updater_info.package_zip);
166 }
Doug Zongker99916f02014-01-13 14:16:58 -0800167 sysReleaseMap(&map);
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700168 free(script);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700169
170 return 0;
171}