cat /mnt/log_function.sh 
#!/bin/bash 
#log function

####log_correct函数打印正确的输出到日志文件 
function log_correct () { 
DATE=`date “+%Y-%m-%d %H:%M:%S”` ####显示打印日志的时间 
USER=$(whoami) ####那个用户在操作 

echo “${DATE} ${USER} execute $0 [INFO] $@” >>/var/log/log_info.log ######（$0脚本本身，$@将参数作为整体传输调用） 
}

function log_error () 
{ 
DATE=`date “+%Y-%m-%d %H:%M:%S”` 
USER=$(whoami) 
echo “\${DATE} \${USER} execute \$0 [INFO] \$@” >>/var/log/log_error.log 
}

function fn_log () 
{ 
if [ $? -eq 0 ] 
then 
log_correct “$@ sucessed!” 
echo -e “\033[32m $@ sucessed. \033[0m” 
else 
log_error “$@ failed!” 
echo -e “\033[41;37m $@ failed. \033[0m” 
exit 
fi 
}

vi log_exec.sh 
#!/bin/sh 
if [ -e /mnt/log_function.sh ] 
then 
source /mnt/log_function.sh 
else 
echo -e “\033[41;37m /mnt/log_function.sh is not exist. \033[0m” 
exit 1 
fi

USER=`whoami` 
if [ $USER == root ] 
then 
log_correct “execute by root” 
else 
log_error “execute by ${USER}” 
echo -e “\033[41;37m you must execute this scritp by root. \033[0m” 
exit 1 
fi

if [ -e /var/log/message ] 
then 
echo 0 > /var/log/message 
fn_log “echo 0 > /var/log/message” 
fi