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 <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"
25
26 // Generated by the makefile, this function defines the
27 // RegisterDeviceExtensions() function, which calls all the
28 // registration functions for device-specific extensions.
29 #include "register.inc"
30
31 // Where in the package we expect to find the edify script to execute.
32 // (Note it's "updateR-script", not the older "update-script".)
33 #define SCRIPT_NAME "META-INF/com/google/android/updater-script"
34
main(int argc,char ** argv)35 int main(int argc, char** argv) {
36 if (argc != 4) {
37 fprintf(stderr, "unexpected number of arguments (%d)\n", argc);
38 return 1;
39 }
40
41 char* version = argv[1];
42 if ((version[0] != '1' && version[0] != '2') || version[1] != '\0') {
43 // We support version "1" or "2".
44 fprintf(stderr, "wrong updater binary API; expected 1 or 2, got %s\n",
45 argv[1]);
46 return 2;
47 }
48
49 // Set up the pipe for sending commands back to the parent process.
50
51 int fd = atoi(argv[2]);
52 FILE* cmd_pipe = fdopen(fd, "wb");
53 setlinebuf(cmd_pipe);
54
55 // Extract the script from the package.
56
57 char* package_data = argv[3];
58 ZipArchive za;
59 int err;
60 err = mzOpenZipArchive(package_data, &za);
61 if (err != 0) {
62 fprintf(stderr, "failed to open package %s: %s\n",
63 package_data, strerror(err));
64 return 3;
65 }
66
67 const ZipEntry* script_entry = mzFindZipEntry(&za, SCRIPT_NAME);
68 if (script_entry == NULL) {
69 fprintf(stderr, "failed to find %s in %s\n", SCRIPT_NAME, package_data);
70 return 4;
71 }
72
73 char* script = malloc(script_entry->uncompLen+1);
74 if (!mzReadZipEntry(&za, script_entry, script, script_entry->uncompLen)) {
75 fprintf(stderr, "failed to read script from package\n");
76 return 5;
77 }
78 script[script_entry->uncompLen] = '\0';
79
80 // Configure edify's functions.
81
82 RegisterBuiltins();
83 RegisterInstallFunctions();
84 RegisterDeviceExtensions();
85 FinishRegistration();
86
87 // Parse the script.
88
89 Expr* root;
90 int error_count = 0;
91 yy_scan_string(script);
92 int error = yyparse(&root, &error_count);
93 if (error != 0 || error_count > 0) {
94 fprintf(stderr, "%d parse errors\n", error_count);
95 return 6;
96 }
97
98 // Evaluate the parsed script.
99
100 UpdaterInfo updater_info;
101 updater_info.cmd_pipe = cmd_pipe;
102 updater_info.package_zip = &za;
103
104 State state;
105 state.cookie = &updater_info;
106 state.script = script;
107 state.errmsg = NULL;
108
109 char* result = Evaluate(&state, root);
110 if (result == NULL) {
111 if (state.errmsg == NULL) {
112 fprintf(stderr, "script aborted (no error message)\n");
113 fprintf(cmd_pipe, "ui_print script aborted (no error message)\n");
114 } else {
115 fprintf(stderr, "script aborted: %s\n", state.errmsg);
116 char* line = strtok(state.errmsg, "\n");
117 while (line) {
118 fprintf(cmd_pipe, "ui_print %s\n", line);
119 line = strtok(NULL, "\n");
120 }
121 fprintf(cmd_pipe, "ui_print\n");
122 }
123 free(state.errmsg);
124 return 7;
125 } else {
126 fprintf(stderr, "script result was [%s]\n", result);
127 free(result);
128 }
129
130 mzCloseZipArchive(&za);
131 free(script);
132
133 return 0;
134 }
135