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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
Yabin Cuia029c9a2016-02-18 11:32:10 -080022#include <string>
23
Doug Zongker9931f7f2009-06-10 14:11:53 -070024#include "edify/expr.h"
25#include "updater.h"
26#include "install.h"
Doug Zongkerbc7ffed2014-08-15 14:31:52 -070027#include "blockimg.h"
Doug Zongker9931f7f2009-06-10 14:11:53 -070028#include "minzip/Zip.h"
Doug Zongker99916f02014-01-13 14:16:58 -080029#include "minzip/SysUtil.h"
Jed Estepff6df892015-12-15 16:04:53 -080030#include "config.h"
Doug Zongker9931f7f2009-06-10 14:11:53 -070031
Elliott Hughes4bbd5bf2016-04-01 18:24:39 -070032#include <selinux/label.h>
33#include <selinux/selinux.h>
34
Doug Zongker2b0fdc62009-06-19 11:22:06 -070035// Generated by the makefile, this function defines the
36// RegisterDeviceExtensions() function, which calls all the
37// registration functions for device-specific extensions.
38#include "register.inc"
39
Doug Zongker9931f7f2009-06-10 14:11:53 -070040// Where in the package we expect to find the edify script to execute.
41// (Note it's "updateR-script", not the older "update-script".)
42#define SCRIPT_NAME "META-INF/com/google/android/updater-script"
43
Tianjie Xu3c62b672016-02-05 18:25:58 -080044extern bool have_eio_error;
45
Stephen Smalley779701d2012-02-09 14:13:23 -050046struct selabel_handle *sehandle;
47
Doug Zongker9931f7f2009-06-10 14:11:53 -070048int main(int argc, char** argv) {
Doug Zongker512536a2010-02-17 16:11:44 -080049 // Various things log information to stdout or stderr more or less
Doug Zongkerfafc85b2013-07-09 12:29:45 -070050 // at random (though we've tried to standardize on stdout). The
51 // log file makes more sense if buffering is turned off so things
52 // appear in the right order.
Doug Zongker512536a2010-02-17 16:11:44 -080053 setbuf(stdout, NULL);
54 setbuf(stderr, NULL);
55
Doug Zongker9931f7f2009-06-10 14:11:53 -070056 if (argc != 4) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -070057 printf("unexpected number of arguments (%d)\n", argc);
Doug Zongker9931f7f2009-06-10 14:11:53 -070058 return 1;
59 }
60
61 char* version = argv[1];
Doug Zongkere08991e2010-02-02 13:09:52 -080062 if ((version[0] != '1' && version[0] != '2' && version[0] != '3') ||
63 version[1] != '\0') {
64 // We support version 1, 2, or 3.
Doug Zongkerfafc85b2013-07-09 12:29:45 -070065 printf("wrong updater binary API; expected 1, 2, or 3; "
Doug Zongkere08991e2010-02-02 13:09:52 -080066 "got %s\n",
Doug Zongkerfb2e3af2009-06-17 17:29:40 -070067 argv[1]);
Doug Zongker9931f7f2009-06-10 14:11:53 -070068 return 2;
69 }
70
71 // Set up the pipe for sending commands back to the parent process.
72
73 int fd = atoi(argv[2]);
74 FILE* cmd_pipe = fdopen(fd, "wb");
75 setlinebuf(cmd_pipe);
76
77 // Extract the script from the package.
78
Doug Zongker99916f02014-01-13 14:16:58 -080079 const char* package_filename = argv[3];
80 MemMapping map;
81 if (sysMapFile(package_filename, &map) != 0) {
82 printf("failed to map package %s\n", argv[3]);
83 return 3;
84 }
Doug Zongker9931f7f2009-06-10 14:11:53 -070085 ZipArchive za;
86 int err;
Doug Zongker99916f02014-01-13 14:16:58 -080087 err = mzOpenZipArchive(map.addr, map.length, &za);
Doug Zongker9931f7f2009-06-10 14:11:53 -070088 if (err != 0) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -070089 printf("failed to open package %s: %s\n",
Doug Zongker99916f02014-01-13 14:16:58 -080090 argv[3], strerror(err));
Doug Zongker9931f7f2009-06-10 14:11:53 -070091 return 3;
92 }
Jed Estepff6df892015-12-15 16:04:53 -080093 ota_io_init(&za);
Doug Zongker9931f7f2009-06-10 14:11:53 -070094
95 const ZipEntry* script_entry = mzFindZipEntry(&za, SCRIPT_NAME);
96 if (script_entry == NULL) {
Doug Zongker99916f02014-01-13 14:16:58 -080097 printf("failed to find %s in %s\n", SCRIPT_NAME, package_filename);
Doug Zongker9931f7f2009-06-10 14:11:53 -070098 return 4;
99 }
100
Yabin Cuia029c9a2016-02-18 11:32:10 -0800101 std::string script(script_entry->uncompLen, '\0');
102 if (!mzReadZipEntry(&za, script_entry, &script[0], script_entry->uncompLen)) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700103 printf("failed to read script from package\n");
Doug Zongker9931f7f2009-06-10 14:11:53 -0700104 return 5;
105 }
Doug Zongker9931f7f2009-06-10 14:11:53 -0700106
107 // Configure edify's functions.
108
109 RegisterBuiltins();
110 RegisterInstallFunctions();
Doug Zongkerbc7ffed2014-08-15 14:31:52 -0700111 RegisterBlockImageFunctions();
Doug Zongker2b0fdc62009-06-19 11:22:06 -0700112 RegisterDeviceExtensions();
Doug Zongker9931f7f2009-06-10 14:11:53 -0700113 FinishRegistration();
114
115 // Parse the script.
116
117 Expr* root;
Doug Zongker8edb00c2009-06-11 17:21:44 -0700118 int error_count = 0;
Yabin Cuia029c9a2016-02-18 11:32:10 -0800119 int error = parse_string(script.c_str(), &root, &error_count);
Doug Zongker8edb00c2009-06-11 17:21:44 -0700120 if (error != 0 || error_count > 0) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700121 printf("%d parse errors\n", error_count);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700122 return 6;
123 }
124
Stephen Smalley779701d2012-02-09 14:13:23 -0500125 struct selinux_opt seopts[] = {
126 { SELABEL_OPT_PATH, "/file_contexts" }
127 };
128
129 sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1);
130
131 if (!sehandle) {
Stephen Smalley779701d2012-02-09 14:13:23 -0500132 fprintf(cmd_pipe, "ui_print Warning: No file_contexts\n");
133 }
Stephen Smalley779701d2012-02-09 14:13:23 -0500134
Doug Zongker9931f7f2009-06-10 14:11:53 -0700135 // Evaluate the parsed script.
136
137 UpdaterInfo updater_info;
138 updater_info.cmd_pipe = cmd_pipe;
139 updater_info.package_zip = &za;
Doug Zongkere08991e2010-02-02 13:09:52 -0800140 updater_info.version = atoi(version);
Doug Zongkerbc7ffed2014-08-15 14:31:52 -0700141 updater_info.package_zip_addr = map.addr;
142 updater_info.package_zip_len = map.length;
Doug Zongker9931f7f2009-06-10 14:11:53 -0700143
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700144 State state;
145 state.cookie = &updater_info;
Yabin Cuia029c9a2016-02-18 11:32:10 -0800146 state.script = &script[0];
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700147 state.errmsg = NULL;
148
149 char* result = Evaluate(&state, root);
Tianjie Xu3c62b672016-02-05 18:25:58 -0800150
151 if (have_eio_error) {
152 fprintf(cmd_pipe, "retry_update\n");
153 }
154
Doug Zongker9931f7f2009-06-10 14:11:53 -0700155 if (result == NULL) {
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700156 if (state.errmsg == NULL) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700157 printf("script aborted (no error message)\n");
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700158 fprintf(cmd_pipe, "ui_print script aborted (no error message)\n");
159 } else {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700160 printf("script aborted: %s\n", state.errmsg);
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700161 char* line = strtok(state.errmsg, "\n");
162 while (line) {
163 fprintf(cmd_pipe, "ui_print %s\n", line);
164 line = strtok(NULL, "\n");
165 }
166 fprintf(cmd_pipe, "ui_print\n");
167 }
168 free(state.errmsg);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700169 return 7;
170 } else {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700171 fprintf(cmd_pipe, "ui_print script succeeded: result was [%s]\n", result);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700172 free(result);
173 }
174
Doug Zongker8e5e4da2010-09-14 18:06:55 -0700175 if (updater_info.package_zip) {
176 mzCloseZipArchive(updater_info.package_zip);
177 }
Doug Zongker99916f02014-01-13 14:16:58 -0800178 sysReleaseMap(&map);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700179 return 0;
180}