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). 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
