我正在修改一个mysql配置文件，基于两个文件（源和目标mysql配置文件）之间的差异，这将在diff.txt文件中生成，我将搜索testing.txt中存在的值，在添加diff.txt中存在的值之前，在目标mysql配置文件中注解它们。
在代码中，我在for循环中给出了提示，以便在继续添加值之前打印确认，但提示无法正常工作，它仅在以下文件中有单个值时才有效。

diff command used:diff target_my.cnf source_my.cnf | grep '>' | sed 's/> *//' > diff.txt

diff.txt包含以下内容：

Max_connections=250
Max_user_connections=300

server.txt具有服务器名称

00000000

testing.txt具有以下功能

Max_connections
Max_user_connections

需要实现：
1.我需要提示显示，就像它应该从testing.txt中选择Max_connections，从diff.txt中选择max_connections=250，从server.txt中选择server=00000000，并要求下面的预期提示。
1.同样的事情，第二个值Max_user_connections从texting.txt和Max_user_connections=300从diff.txt和server=000000从server.txt，并要求下面的提示，并在那里结束它自己。但在我的情况下，我没有得到适当的提示。
预期的提示语句：

Do you want to comment env(max_user_connections) and add (max_user_connections=300) in server(0000000) after verifying? [yes/no]
Do you want to comment env(max_connections) and add (max_connections=250)in server(0000000) after verifying? [yes/no]

但根据我的代码，它以分散的方式显示如下提示：

Do you want to comment env(max_user_connections) and add (max_user_connections=300) in server(0000000) after verifying? [yes/no]
Do you want to comment env(max_connections) and add (max_user_connections=300) in server(0000000) after verifying? [yes/no]
Do you want to comment env(max_user_connections) and add (max_connections=250) in server(0000000) after verifying? [yes/no]
Do you want to comment env(max_connections) and add (max_connections=250) in server(0000000) after verifying? [yes/no]

需要帮助获得正确的提示，以便我可以修改配置文件。
所用代码：

function ask{
    question="$1"
    ok=0
    while [ $ok -eq 0 ]; do
        read -p " $question [yes/no] " reply
        if [ "$reply" == "yes" ]  || [ "$reply" == "no" ]; then
            ok=1
    done
    echo -n "$reply"
}

for server in `cat server.txt`
do    
    for var in `cat diff.txt`    
    do   
        var1=$(sed "/=[^=]*$//g" diff.txt)
        echo "$var1" > testing.txt
        for var2 in `cat testing.txt`   
            reply=$(ask "do you want to comment($var2) and add($var) for                             server($server?")            
            if [ "$reply" == "yes" ]; then   
                sed -i "s/^${var1}/#&/" target_my.cnf       
                sed -i "/^#${var1}/a ${var}" target_my.cnf    
            else        
                echo -e "Skipping"    
            fi        
        done
    done
done

尝试的其他方法：

for server in `cat server.txt`
do
    for var in `cat diff.txt`    
    do   
        var1=$(sed "/=[^=]*$//g" diff.txt)
        echo "$var1" > testing.txt    
        for var2 in `cat testing.txt`   
               echo "do you want to comment($var2) and add($var) for  server($server?")
            read -r reply        
            if [ "$reply" == "yes" ]; then   
                sed -i "s/^${var1}/#&/" target_my.cnf       
                sed -i "/^#${var1}/a ${var}" target_my.cnf    
            else        
                echo -e "Skipping"    
            fi        
        done
    done
done

尝试使用while循环，但出现相同的提示：

while read -r server ; do
        while read -r var ; do    
              While read -r var2 ; do
                  echo -e "do you want to comment${var2} and add${var} for server${server}?"      
                read -r reply < /dev/tty        
                if [ "$reply" == "yes" ]; then   
                    sed -i "s/^${var1}/#&/" target_my.cnf       
                    sed -i "/^#${var1}/a ${var}" target_my.cnf    
                else        
                    echo -e "Skipping"    
              fi        
          done < documented.txt
      done < testing.txt
 done < server_my.cnf.txt