shell使用mysqld_multi自动做多实例从库脚本

代码如下:
# cat doallslave.sh
#!/bin/sh
#code by scpman
#mail:scpman@live.com
#blog:http://www.scpman.com
#name:"doallslave.sh"
helpinfo()
{
echo -e '/t/thelp 查看帮助信息'
echo -e '/t/t自动做allslave从库脚本使用帮助'
echo -e '/t/tslavename 只能是xxx_xxx这种命令例如:zq2013_test1'
echo -e '/t/t添加一个新从库 三个参数addslave    slavename ip         mysql.tar-name rootpasswd'
echo -e '/t/t例子：         addslave  slavename 10.0.88.88  mysql.xxx.tar passwd  '
echo -e '/t/t删除一个从库  三个参数 delslave    slavename '
echo -e '/t/t例子：         delslave slavename'
}
#如果用户没有输入参数(或者输入错误的参数)，或者输入的参数为help,则显示帮助信息，并退出。
if [ -z "$1"  -o "$1" = "help" ]
then
helpinfo
exit
fi
mulu_create()
{
    if [ -d $1 ]
    then
        echo "$1 is have";
    else
        mkdir -p $1;
        echo "create $1 ok!"
    fi
}
check_mycnf()
{
    temp1=`tail -n 1 /etc/my.cnf |grep "server_id"`;
    if [ -z "$temp1" ]
    then
        sed -i ""  '$d' /etc/my.cnf
        check_mycnf

    else   
        echo "/etc/my.cnf符合规范";
    fi
}
fuc_addslave()
{
if [ -n "$1" -a -n "$2" -a -n "$3" -a -n "$4" ]
then
    slavename=$1
    masterip=$2
    bao_path=$3
    passwd=$4
else
    echo "1 2 3 4 is null!shell exit now"
    helpinfo
    exit
fi
#检查my.cnf是否正确
check_mycnf
echo "开始创建数据包存放目录！"
sleep 1
mulu_create "/usr/doslave/${slavename}/"
mulu_create "/usr/db_backups/${slavename}_mysql_backup/"
mulu_create "/usr/mysql_backup/${slavename}_mysql_backup/"
mulu_create "/usr/mysql_backup_temp/${slavename}_mysql_backup/"
tar -zxvf $bao_path -C /usr/doslave/${slavename}/;
rm -rf /usr/db_backups/${slavename}_mysql_backup/*;
mv /usr/doslave/${slavename}/usr/dlm_db/mysql/*  /usr/db_backups/${slavename}_mysql_backup/;
chown -R mysql:mysql /usr/db_backups/${slavename}_mysql_backup/;
echo "数据放置完成！开始生成配置文件"
mulu_create "/usr/doslave/confbak"
cp /etc/my.cnf /usr/doslave/confbak/my.cnf_`date +%Y%m%d%H%M%S`;
cp /usr/mysql_backup/dblist /usr/doslave/confbak/dblist_`date +%Y%m%d%H%M%S`;
#######################my.cnf#############