Linux 在 Bash 脚本中解析命令输出
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Parsing Command Output in Bash Script
提问by Mr Shoubs
I want to run a command that gives the following output and parse it:
我想运行一个提供以下输出的命令并解析它：
[VDB VIEW]
[VDB] vhctest
[BACKEND] domain.computername: ENABLED:RW:CONSISTENT
[BACKEND] domain.computername: ENABLED:RW:CONSISTENT
...
I'm only interested in some key works, such as 'ENABLED' etc. I can't search just for ENABLED as I need to parse each line at a time.
我只对一些关键作品感兴趣，例如“ENABLED”等。我不能只搜索 ENABLED，因为我需要一次解析每一行。
This is my first script, and I want to know if anyone can help me?
这是我的第一个脚本，我想知道是否有人可以帮助我？
EDIT: I now have:
编辑：我现在有：
cmdout=`mycommand`
while read -r line
do
#check for key words in $line
done < $cmdout
I thought this did what I wanted but it always seems to output the following right before the command output.
我认为这做了我想要的，但它似乎总是在命令输出之前输出以下内容。
./myscript.sh: 29: cannot open ... : No such file
./myscript.sh: 29: 无法打开... : 没有这样的文件
I don't want to write to a file to have to achieve this.
我不想写入文件来实现这一点。
Here is the psudo code:
这是伪代码：
cmdout=`mycommand`
loop each line in $cmdout
if line contains
if line contains
output 1
else
output 0
采纳答案by Paused until further notice.
The reason for the error is that
错误的原因是
done < $cmdout
thinks that the contents of $cmdoutis a filename.
认为的内容$cmdout是一个文件名。
You can either do:
你可以这样做：
done <<< $cmdout
or
或者
done <<EOF
$cmdout
EOF
or
或者
done < <(mycommand) # without using the variable at all
or
或者
done <<< $(mycommand)
or
或者
done <<EOF
$(mycommand)
EOF
or
或者
mycommand | while
...
done
However, the last one creates a subshell and any variables set in the loop will be lost when the loop exits.
但是，最后一个创建了一个子shell，当循环退出时，循环中设置的任何变量都将丢失。
回答by Ignacio Vazquez-Abrams
回答by qwerty
$ cat test.sh
#!/bin/bash
while read line ; do
if [ `echo $line|grep "" | wc -l` != 0 ]; then
if [ `echo $line|grep "" | wc -l` != 0 ]; then
echo "output 1"
else
echo "output 0"
fi
fi
done
USAGE
用法
$ cat in.txt | ./test.sh ENABLED RW
output 1
output 1
This isn't the best solution, but its a word by word translation of what you want and should give you something to start with and add your own logic
这不是最好的解决方案，但它是你想要的逐字翻译，应该给你一些开始并添加你自己的逻辑
