通过 shell 脚本在字符串中转义美元符号 [英] Escape dollar sign in string by shell script

问题描述

假设我有一个名为 dd.sh 的脚本，我像这样运行它

Suppose I have a script named dd.sh, and I run it like this

./dd.sh sample$name.mp4

所以 $1 是字符串 sample$name.mp4.

echo '$1' // shows $1

echo "$1" // shows "sample.mp4"; want "sample$name.mp4"

然后如何处理$1，可以检测参数$1

Then how to process $1 that I can detect whether there is a dollar sign in parameter $1

我想将字符串处理为sample$name.mp4 或者只是检测参数$filename

I want to process the string to sample$name.mp4 or just detect whether there is a dollar sign in parameter $filename

推荐答案

如您所知，美元符号标记一个变量.您在输入时必须考虑到这一点.

As you know, a dollar sign marks a variable. You have to take it into account when you are typing it.

你可以逃避美元

./dd.sh "sample$name.mp4"

或者只用单引号输入

./dd.sh 'sample$name.mp4'

<小时>

要检查变量中是否有美元符号，请执行

---

To check if there is a dollar sign in a variable, do

[[ $variable == *$* ]] && echo 'I HAZ A DOLAR!!!' || echo 'MEH'

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