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      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 #ifndef _ROTATE_LOGS_H
     18 #define _ROTATE_LOGS_H
     19 
     20 #include <string>
     21 
     22 #include <private/android_logger.h> /* private pmsg functions */
     23 
     24 constexpr int KEEP_LOG_COUNT = 10;
     25 
     26 ssize_t logbasename(log_id_t /* logId */,
     27         char /* prio */,
     28         const char *filename,
     29         const char * /* buf */, size_t len,
     30         void *arg);
     31 
     32 ssize_t logrotate(
     33         log_id_t logId,
     34         char prio,
     35         const char *filename,
     36         const char *buf, size_t len,
     37         void *arg);
     38 
     39 // Rename last_log -> last_log.1 -> last_log.2 -> ... -> last_log.$max.
     40 // Similarly rename last_kmsg -> last_kmsg.1 -> ... -> last_kmsg.$max.
     41 // Overwrite any existing last_log.$max and last_kmsg.$max.
     42 void rotate_logs(const char* last_log_file, const char* last_kmsg_file);
     43 
     44 #endif //_ROTATE_LOG_H
     45