#!/bin/bash
#
#   xrkmonitor license 
#
#   Copyright (c) 2020 by rockdeng
#
#   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.
#
#
#   字符云监控(xrkmonitor) 开源版 (c) 2021 by rockdeng
#   当前版本：v1.0
#   使用授权协议： apache license 2.0
#
#   开源版主页：http://open.xrkmonitor.com
#   云版本主页：http://xrkmonitor.com
#  
#
#   云版本为开源版提供永久免费告警通道支持，告警通道支持短信、邮件、
#   微信等多种方式，欢迎使用
#
#   监控插件 mysql_slave_check 功能:
#        mysql 主从同步监控，主从不同步时会记录错误日志并发送异常告警
#
#   插件开发时间：2021-11-19
#   插件开发人员：官方
#   插件开发人员云账号ID：1
#
#   脚本功能：
#       当前目录下的文件，调用脚本时当前目录为脚本所在目录
#       该脚本在修改插件配置时由监控 agent - slog_mtreport_client 自动调用执行
#
#       通过环境变量 file_name 传入要备份的文件名
#

if [ "$file_name" == '' ]; then
    exit 1 
fi

MAXCOUNTBACK=10
CURDATE=`date '+%Y%m%d-%H%M%S'`
cp ${file_name} ${file_name}_bk-${CURDATE}
COUNT=`ls -lt ${file_name}_bk*|wc -l`
if [ $COUNT -lt $MAXCOUNTBACK ]; then
    exit
fi
ls -lrt ${file_name}_bk* |awk '{if(NR==1) print $9}' |xargs rm -f {} \;