1 /* 2 * Copyright (C) 2014 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 #pragma once 18 19 #include <private/android_logger.h> 20 #include <sysutils/SocketListener.h> 21 22 #include "LogBuffer.h" 23 #include "LogStatistics.h" 24 25 class LogKlog : public SocketListener { 26 LogBuffer* logbuf; 27 const log_time signature; 28 // Set once thread is started, separates KLOG_ACTION_READ_ALL 29 // and KLOG_ACTION_READ phases. 30 bool initialized; 31 // Used during each of the above phases to control logging. 32 bool enableLogging; 33 // set if we are also running auditd, to filter out audit reports from 34 // our copy of the kernel log 35 bool auditd; 36 37 static log_time correction; 38 39 public: 40 LogKlog(LogBuffer* buf, int fdWrite, int fdRead, bool auditd, LogStatistics* stats); 41 int log(const char* buf, ssize_t len); 42 convertMonotonicToReal(log_time & real)43 static void convertMonotonicToReal(log_time& real) { real += correction; } 44 45 protected: 46 log_time sniffTime(const char*& buf, ssize_t len, bool reverse); 47 pid_t sniffPid(const char*& buf, ssize_t len); 48 void calculateCorrection(const log_time& monotonic, const char* real_string, ssize_t len); 49 virtual bool onDataAvailable(SocketClient* cli); 50 51 private: 52 LogStatistics* stats_; 53 }; 54