[問題] 斜線取代\

[clanguage (C語言)]

想問一下如何在 shell/shell script 下使用反斜線取代?

試著處理反斜線的取代，但是失敗了

在 test.sh 中使用  perl:

1. 只取代一個英文 word -> ok

#!/bin/bash
string="pre-string\\middle\\post-string";
echo $string;
string2=`echo $string | perl -pe s/middle/in_the_middle/;`;
echo "string2 = $string2";

輸出
pre-string\middle\post-string
string2 = pre-string\in_the_middle\post-string

2. 試著取代反斜線

#!/bin/bash
string="pre-string\\middle\\post-string";
echo $string;
string2=`echo $string | perl -pe "s/\\middle\\/in_the_middle/;"`;
echo "string2 = $string2";

輸出:
pre-string\middle\post-string
Substitution replacement not terminated at -e line 1.
string2 =

請問應該怎麼使用？ 謝謝

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