如何处理接收到的作为grep命令的结果的每一行 [英] how to process each line received as a result of grep command

问题描述

我没有。运行grep命令如下后，从文件中检索行

I have no. of lines retrieved from a file after running grep command as follow

var=`grep xyz abc.txt`

可以说我得到了10没有。行它由XYZ作为结果

lets say I got 10 no. of lines which consists xyz as a result.

现在我需要处理的每一行我是grep命令的结果。
如何进行此，请给一些想法..

Now I need to process each line I got as result of grep command. how to proceed for this , please give some idea ..

推荐答案

其中一个简单的方法是不是存储在一个变量的输出，而是直接遍历它一段时间/读循环。

One of the easy ways is not to store the output in a variable, but directly iterate over it with a while/read loop.

是这样的：

grep xyz abc.txt | while read -r line ; do
    echo "Processing $line"
    # your code goes here
done

有这取决于你到底是什么后该方案的变化。

There are variations on this scheme depending on exactly what you're after.

如果你需要改变的变量循环内（且这种变化是它的外部可见的），则可以使用替代过程中的 fedorqui的回答：

If you need to change variables inside the loop (and have that change be visible outside of it), you can use process substitution as stated in fedorqui's answer:

while read -r line ; do
    echo "Processing $line"
    # your code goes here
done < <(grep xyz abc.txt)

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