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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>
20
21#include "edify/expr.h"
22#include "updater.h"
23#include "install.h"
24#include "minzip/Zip.h"
Doug Zongker99916f02014-01-13 14:16:58 -080025#include "minzip/SysUtil.h"
Doug Zongker9931f7f2009-06-10 14:11:53 -070026
Doug Zongker2b0fdc62009-06-19 11:22:06 -070027// Generated by the makefile, this function defines the
28// RegisterDeviceExtensions() function, which calls all the
29// registration functions for device-specific extensions.
30#include "register.inc"
31
Doug Zongker9931f7f2009-06-10 14:11:53 -070032// Where in the package we expect to find the edify script to execute.
33// (Note it's "updateR-script", not the older "update-script".)
34#define SCRIPT_NAME "META-INF/com/google/android/updater-script"
35
Stephen Smalley779701d2012-02-09 14:13:23 -050036struct selabel_handle *sehandle;
37
Doug Zongker9931f7f2009-06-10 14:11:53 -070038int main(int argc, char** argv) {
Doug Zongker512536a2010-02-17 16:11:44 -080039 // Various things log information to stdout or stderr more or less
Doug Zongkerfafc85b2013-07-09 12:29:45 -070040 // at random (though we've tried to standardize on stdout). The
41 // log file makes more sense if buffering is turned off so things
42 // appear in the right order.
Doug Zongker512536a2010-02-17 16:11:44 -080043 setbuf(stdout, NULL);
44 setbuf(stderr, NULL);
45
Doug Zongker9931f7f2009-06-10 14:11:53 -070046 if (argc != 4) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -070047 printf("unexpected number of arguments (%d)\n", argc);
Doug Zongker9931f7f2009-06-10 14:11:53 -070048 return 1;
49 }
50
51 char* version = argv[1];
Doug Zongkere08991e2010-02-02 13:09:52 -080052 if ((version[0] != '1' && version[0] != '2' && version[0] != '3') ||
53 version[1] != '\0') {
54 // We support version 1, 2, or 3.
Doug Zongkerfafc85b2013-07-09 12:29:45 -070055 printf("wrong updater binary API; expected 1, 2, or 3; "
Doug Zongkere08991e2010-02-02 13:09:52 -080056 "got %s\n",
Doug Zongkerfb2e3af2009-06-17 17:29:40 -070057 argv[1]);
Doug Zongker9931f7f2009-06-10 14:11:53 -070058 return 2;
59 }
60
61 // Set up the pipe for sending commands back to the parent process.
62
63 int fd = atoi(argv[2]);
64 FILE* cmd_pipe = fdopen(fd, "wb");
65 setlinebuf(cmd_pipe);
66
67 // Extract the script from the package.
68
Doug Zongker99916f02014-01-13 14:16:58 -080069 const char* package_filename = argv[3];
70 MemMapping map;
71 if (sysMapFile(package_filename, &map) != 0) {
72 printf("failed to map package %s\n", argv[3]);
73 return 3;
74 }
Doug Zongker9931f7f2009-06-10 14:11:53 -070075 ZipArchive za;
76 int err;
Doug Zongker99916f02014-01-13 14:16:58 -080077 err = mzOpenZipArchive(map.addr, map.length, &za);
Doug Zongker9931f7f2009-06-10 14:11:53 -070078 if (err != 0) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -070079 printf("failed to open package %s: %s\n",
Doug Zongker99916f02014-01-13 14:16:58 -080080 argv[3], strerror(err));
Doug Zongker9931f7f2009-06-10 14:11:53 -070081 return 3;
82 }
83
84 const ZipEntry* script_entry = mzFindZipEntry(&za, SCRIPT_NAME);
85 if (script_entry == NULL) {
Doug Zongker99916f02014-01-13 14:16:58 -080086 printf("failed to find %s in %s\n", SCRIPT_NAME, package_filename);
Doug Zongker9931f7f2009-06-10 14:11:53 -070087 return 4;
88 }
89
90 char* script = malloc(script_entry->uncompLen+1);
91 if (!mzReadZipEntry(&za, script_entry, script, script_entry->uncompLen)) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -070092 printf("failed to read script from package\n");
Doug Zongker9931f7f2009-06-10 14:11:53 -070093 return 5;
94 }
95 script[script_entry->uncompLen] = '\0';
96
97 // Configure edify's functions.
98
99 RegisterBuiltins();
100 RegisterInstallFunctions();
Doug Zongker2b0fdc62009-06-19 11:22:06 -0700101 RegisterDeviceExtensions();
Doug Zongker9931f7f2009-06-10 14:11:53 -0700102 FinishRegistration();
103
104 // Parse the script.
105
106 Expr* root;
Doug Zongker8edb00c2009-06-11 17:21:44 -0700107 int error_count = 0;
Doug Zongker0d32f252014-02-13 15:07:56 -0800108 int error = parse_string(script, &root, &error_count);
Doug Zongker8edb00c2009-06-11 17:21:44 -0700109 if (error != 0 || error_count > 0) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700110 printf("%d parse errors\n", error_count);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700111 return 6;
112 }
113
Stephen Smalley779701d2012-02-09 14:13:23 -0500114 struct selinux_opt seopts[] = {
115 { SELABEL_OPT_PATH, "/file_contexts" }
116 };
117
118 sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1);
119
120 if (!sehandle) {
Stephen Smalley779701d2012-02-09 14:13:23 -0500121 fprintf(cmd_pipe, "ui_print Warning: No file_contexts\n");
122 }
Stephen Smalley779701d2012-02-09 14:13:23 -0500123
Doug Zongker9931f7f2009-06-10 14:11:53 -0700124 // Evaluate the parsed script.
125
126 UpdaterInfo updater_info;
127 updater_info.cmd_pipe = cmd_pipe;
128 updater_info.package_zip = &za;
Doug Zongkere08991e2010-02-02 13:09:52 -0800129 updater_info.version = atoi(version);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700130
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700131 State state;
132 state.cookie = &updater_info;
133 state.script = script;
134 state.errmsg = NULL;
135
136 char* result = Evaluate(&state, root);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700137 if (result == NULL) {
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700138 if (state.errmsg == NULL) {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700139 printf("script aborted (no error message)\n");
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700140 fprintf(cmd_pipe, "ui_print script aborted (no error message)\n");
141 } else {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700142 printf("script aborted: %s\n", state.errmsg);
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700143 char* line = strtok(state.errmsg, "\n");
144 while (line) {
145 fprintf(cmd_pipe, "ui_print %s\n", line);
146 line = strtok(NULL, "\n");
147 }
148 fprintf(cmd_pipe, "ui_print\n");
149 }
150 free(state.errmsg);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700151 return 7;
152 } else {
Doug Zongkerfafc85b2013-07-09 12:29:45 -0700153 fprintf(cmd_pipe, "ui_print script succeeded: result was [%s]\n", result);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700154 free(result);
155 }
156
Doug Zongker8e5e4da2010-09-14 18:06:55 -0700157 if (updater_info.package_zip) {
158 mzCloseZipArchive(updater_info.package_zip);
159 }
Doug Zongker99916f02014-01-13 14:16:58 -0800160 sysReleaseMap(&map);
Doug Zongkerd9c9d102009-06-12 12:24:39 -0700161 free(script);
Doug Zongker9931f7f2009-06-10 14:11:53 -0700162
163 return 0;
164}