Shell命令匹配键值对

I've got a file that contains a list of key=value pairs, each on its own line. What's the best way to fetch the value for a specified key using shell commands?

我有一个包含key = value对列表的文件，每个文件都有自己的行。使用shell命令获取指定键值的最佳方法是什么？

3 个解决方案

#1

what about

关于什么

grep "key" my_file | cut -d'=' -f2

#2

This is how I do it in ksh.

这就是我在ksh中的表现。

FOO=$(grep "^key=" $filename | awk -F"=" '{print $2}')

You can also use cut instead of awk. If you delimit the key pair with a space you can drop the -F"=".

你也可以使用cut而不是awk。如果使用空格分隔密钥对，则可以删除-F“=”。

#3

read -r -p "Enter key to fetch: " key
awk -vk="$key" -F"=" '$1~k{ print "value for "k" is "$2} ' file

output

产量

$ ./shell.sh
Enter key to fetch: key1
value for key1 is value1

or you can just use the shell(eg bash)

或者你可以只使用shell（例如bash）

read -r -p "Enter key to fetch: " key    
while IFS="=" read -r k v
do
    case "$k" in
        *"$key"* ) echo "value of key: $k is $v";;
    esac
done <"file"

#1