Question

我正在使用以下命令打开，替换，查看更改并保存文件，

sed＆＃39; s / old string / new string / g＆＃39;文件名＆gt; filename1; diff filename1 filename; mv filename1 filename

是否可以在执行mv命令之前请求确认，如下所示

sed＆＃39; s / old string / new string / g＆＃39;文件名＆gt;文件名1 diff filename1 filename

来自用户的是或否输入命令

mv filename1 filename

共鸣是验证变化，然后保存......

请帮忙......

Answer 1

是的，您可以通过read将用户输入读入变量，然后与某些可接受的值进行比较，例如"yes"。您还可以将命令存储在变量中并将其打印给用户并稍后执行。

#!/bin/bash

COMMAND='mv filename1 filename'

echo "Perform the following command:"
echo
echo "    \$ $COMMAND"
echo
echo -n "Answer 'yes' or 'no': "

read REPLY
if [[ $REPLY == "yes" ]]; then
    $COMMAND
else
    echo Aborted
    exit 0
fi

Answer 2

我的剧本是，

#!/bin/bash


sed 's/This/It/g' test.xml > "test.xml1"

diff test.xml test.xml1

COMMAND ='mv test.xml1 test.xml'

echo "Perform the following command:"
echo
echo "   \$ $COMMAND"
echo
echo -n "Answer 'yes' or 'no':"

read REPLY 

if[[$REPLY=="yes"]]; then
$COMMAND

else 

echo Aborted

exit 0

fi

执行错误是

2c2
< This is a Test file
---
> It is a Test file
./test.sh[9]: COMMAND:  not found
Perform the following command:

   $

-n Answer 'yes' or 'no':
yes
./test.sh[19]: syntax error at line 20 : `then' unexpected

mv命令无效。

Answer 3

我在bash上使用了这种简单的衬纸：

echo -n 'Confirm: ' && read 'x' && [ $x == 'y' ] && <command>。

这样，我不依赖其他实用程序，它仅在输入为单个y时运行。

在Shell脚本中执行另一个命令之前提示确认的命令

3 个答案: