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Diffstat (limited to 'tools/check_prereq/check_prereq.c')
-rw-r--r-- | tools/check_prereq/check_prereq.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/tools/check_prereq/check_prereq.c b/tools/check_prereq/check_prereq.c new file mode 100644 index 0000000..d7b8918 --- /dev/null +++ b/tools/check_prereq/check_prereq.c @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2009 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <sys/system_properties.h> +#include <cutils/properties.h> + +// Compare the timestamp of the new build (passed on the command line) +// against the current value of ro.build.date.utc. Exit successfully +// if the new build is newer than the current build (or if the +// timestamps are the same). +int main(int argc, char** argv) { + if (argc != 2) { + usage: + fprintf(stderr, "usage: %s <timestamp>\n", argv[0]); + return 2; + } + + char value[PROPERTY_VALUE_MAX]; + char* default_value = "0"; + + property_get("ro.build.date.utc", value, default_value); + + long current = strtol(value, NULL, 10); + char* end; + long install = strtol(argv[1], &end, 10); + + printf("current build time: [%ld] new build time: [%ld]\n", + current, install); + + return (*end == 0 && current > 0 && install >= current) ? 0 : 1; +} |