1 /* 2 * Copyright (C) 2016 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 "uptime_parser.h" 18 19 #include <time.h> 20 #include <cstdlib> 21 #include <string> 22 #include <android-base/file.h> 23 #include <android-base/logging.h> 24 25 namespace bootstat { 26 27 time_t ParseUptime() { 28 std::string uptime_str; 29 if (!android::base::ReadFileToString("/proc/uptime", &uptime_str)) { 30 PLOG(ERROR) << "Failed to read /proc/uptime"; 31 return -1; 32 } 33 34 // Cast intentionally rounds down. 35 return static_cast<time_t>(strtod(uptime_str.c_str(), NULL)); 36 } 37 38 } // namespace bootstat
