bash 在bash中转义字符串的命令
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Command to escape a string in bash
提问by User1
I need a bash command that will convert a string to something that is escaped. Here's an example:
我需要一个 bash 命令，它将字符串转换为转义的内容。下面是一个例子：
echo "hello\world" | escape | someprog
Where the escape command makes "hello\world"into "hello\\\world". Then, someprog can use "hello\\world"as it expects. Of course, this is a simplified example of what I will really be doing.
转义命令在哪里"hello\world"变成"hello\\\world". 然后，someprog 可以"hello\\world"按预期使用。当然，这是我真正要做的事情的一个简化示例。
回答by Paused until further notice.
In Bash:
在 Bash 中：
printf "%q" "hello\world" | someprog
for example:
例如：
printf "%q" "hello\world"
hello\world
This could be used through variables too:
这也可以通过变量使用：
printf -v var "%q\n" "hello\world"
echo "$var"
hello\world
回答by Fritz G. Mehner
Pure Bash, use parameter substitution:
纯 Bash，使用参数替换：
string="Hello\ world"
echo ${string//\/\\} | someprog
回答by Michael Aaron Safyan
You can use perl to replace various characters, for example:
您可以使用 perl 替换各种字符，例如：
$ echo "Hello\ world" | perl -pe 's/\/\\/g'
Hello\ world
Depending on the nature of your escape, you can chain multiple calls to escape the proper characters.
根据转义的性质，您可以链接多个调用来转义正确的字符。
