sed 失败，并显示“'s' 的未知选项"；错误 [英] sed fails with "unknown option to `s'" error

问题描述

我正在尝试使用

sed -i -e "s/.*seb.*/    \"$ftp_login_template\"/" $ftp_dir

但是我收到此错误:

sed: -e expression #1, char 34: unknown option to `s'

我不明白为什么，因为这非常有效:

I don't understand why since this works perfectly:

sed -i -e "s/.*wbspassword.*/    \"wbspassword\": \"$password\",/" $user_conf

对我做错了什么有什么想法吗?

Any ideas as to what I'm doing wrong?

这可能是问题吗?ftp_login_template=\${user}:${password}:24:86::\/var\/lib\/clit.${user}\/downloads:\/bin\/false\"

推荐答案

问题在于斜杠:你的变量包含斜杠，最终的命令将类似于 sed "s/string/path/to/something/g"，包含太多斜线.

The problem is with slashes: your variable contains them and the final command will be something like sed "s/string/path/to/something/g", containing way too many slashes.

由于 sed 可以将任何字符作为分隔符(无需声明新的分隔符)，您可以尝试使用另一个没有出现在替换字符串中的字符:

Since sed can take any char as delimiter (without having to declare the new delimiter), you can try using another one that doesn't appear in your replacement string:

replacement="/my/path"
sed --expression "s@pattern@$replacement@"

请注意，这不是防弹的:如果替换字符串稍后包含 @ 它将出于相同的原因而中断，并且任何反斜杠序列如 \1 仍将是根据 sed 规则解释.使用 | 作为分隔符也是一个不错的选择，因为它的可读性类似于 /.

Note that this is not bullet proof: if the replacement string later contains @ it will break for the same reason, and any backslash sequences like \1 will still be interpreted according to sed rules. Using | as a delimiter is also a nice option as it is similar in readability to /.

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