• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 <stdlib.h>
19 #include <sys/system_properties.h>
20 #include <cutils/properties.h>
21 
22 // Compare the timestamp of the new build (passed on the command line)
23 // against the current value of ro.build.date.utc.  Exit successfully
24 // if the new build is newer than the current build (or if the
25 // timestamps are the same).
main(int argc,char ** argv)26 int main(int argc, char** argv) {
27   if (argc != 2) {
28  usage:
29     fprintf(stderr, "usage: %s <timestamp>\n", argv[0]);
30     return 2;
31   }
32 
33   char value[PROPERTY_VALUE_MAX];
34   char* default_value = "0";
35 
36   property_get("ro.build.date.utc", value, default_value);
37 
38   long current = strtol(value, NULL, 10);
39   char* end;
40   long install = strtol(argv[1], &end, 10);
41 
42   printf("current build time: [%ld]  new build time: [%ld]\n",
43          current, install);
44 
45   return (*end == 0 && current > 0 && install >= current) ? 0 : 1;
46 }
47