查配置文件中配置项，不存在则添加

查配置文件中配置项，不存在则添加

下面是查xxx服务的supervisor的stopwaitsecs配置，然后不存在则添加

function update_xxx_supervisor_stopwaitsecs() {
    # 更新xxx的supervisor配置文件中的stopwaitsecs
    echo "update xxx supervisor stopwaitsecs config"

    xxx_supervisor_conf="/etc/supervisor/conf.d/xxx.conf"
    if [ -f $xxx_supervisor_conf ];then
        stopwaitsecs=$(cat $xxx_supervisor_conf | grep stopwaitsecs)

        if [ -z "$stopwaitsecs" ];then
            sed -i '/program:xxx/astopwaitsecs=50' $xxx_supervisor_conf
            echo "update_xxx_supervisor_stopwaitsecs $xxx_supervisor_conf success."
            supervisorctl update
        else
            echo "stopwaitsecs already exists in in $xxx_supervisor_conf."
        fi

    else
        echo "file $xxx_supervisor_conf not exist."
    fi
}