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 #ifndef _LOGD_LOG_KLOG_H__ 18 #define _LOGD_LOG_KLOG_H__ 19 20 #include <private/android_logger.h> 21 #include <sysutils/SocketListener.h> 22 23 class LogBuffer; 24 class LogReader; 25 26 class LogKlog : public SocketListener { 27 LogBuffer* logbuf; 28 LogReader* reader; 29 const log_time signature; 30 // Set once thread is started, separates KLOG_ACTION_READ_ALL 31 // and KLOG_ACTION_READ phases. 32 bool initialized; 33 // Used during each of the above phases to control logging. 34 bool enableLogging; 35 // set if we are also running auditd, to filter out audit reports from 36 // our copy of the kernel log 37 bool auditd; 38 39 static log_time correction; 40 41 public: 42 LogKlog(LogBuffer* buf, LogReader* reader, int fdWrite, int fdRead, 43 bool auditd); 44 int log(const char* buf, ssize_t len); 45 void synchronize(const char* buf, ssize_t len); 46 isMonotonic()47 bool isMonotonic() { 48 return logbuf->isMonotonic(); 49 } convertMonotonicToReal(log_time & real)50 static void convertMonotonicToReal(log_time& real) { 51 real += correction; 52 } convertRealToMonotonic(log_time & real)53 static void convertRealToMonotonic(log_time& real) { 54 real -= correction; 55 } 56 57 protected: 58 log_time sniffTime(const char*& buf, ssize_t len, bool reverse); 59 pid_t sniffPid(const char*& buf, ssize_t len); 60 void calculateCorrection(const log_time& monotonic, const char* real_string, ssize_t len); 61 virtual bool onDataAvailable(SocketClient* cli); 62 }; 63 64 #endif 65