linux shell脚本清理日志文件

#!/bin/sh 
########################### 
#delete log blog.duplicatedcode.com 
# in_day_num: like 1 2 is delete 2day ago logs 
# in_log_path like tomcat log home 
########################### 
in_log_path=${1} 
in_day_num=${2} 
tmp_delete_log=/var/log/deletelog/"`date +%Y%m`.log" 
deleteLog() 
{ 
inner_num=${1} 
#find log 
echo "[`date`] >> start delete logs---" >> $tmp_delete_log 
find ${in_log_path} -type f -mtime ${inner_num} -print0 | xargs -0 rm -rf 
echo "[`date`] >> end delete logs---" >> $tmp_delete_log 
} 
init() 
{ 
mkdir -p /var/log/deletelog/ 
} 
main() 
{ 
init 
if [ -z ${in_log_path} ];then 
echo "[`date`] >> error log_path not init---" >> $tmp_delete_log 
return 
fi 
inner_day_num=+7 
if [[ -n ${in_day_num} ]] && [[ ${in_day_num} -ge 1 ]] ; then 
${inner_day_num}=${in_day_num} 
fi 
deleteLog ${inner_day_num} 
} 
main