• dohpaz42@lemmy.world
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    2 months ago
    sudo echo "# FYI quotes(") must be escaped with \ like \"
    

    👆 that is not a comment. That is a command that says to echo the text “# FYI quotes(” and then to do ) must be escaped like \ \" which is invalid syntax.

    I assume that startup script is reading the contents of the file and trying to echo them into another file? i.e., using the original file as a template, but is not escaping the input, hence the error — which you’re lucky that’s the problem you’re encountering and not something actually destructive like sudo echo "# foo" && rm -rf /*.

    • aidan@lemmy.worldOP
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      2 months ago

      dsygraphia, I meant to say escape the quotes(you can see that because the comment wasn’t about comments but was instead about quotes)

      • dohpaz42@lemmy.world
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        2 months ago

        It’s all good. If you’re using bash and readline to read the file, you can use sudo echo ${INPUT@Q} (assuming your variable is named $INPUT) to have bash escape things like the quotes and other characters that could get you into trouble.

        • aidan@lemmy.worldOP
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          2 months ago

          Sadly no, its injected with terraform templatefile, I already looked for a normal way to autoescape it, but from a brief look I couldn’t find one. I know there is a replace function that can take regex(RE2, which from my understanding prohibits * in lookbehinds)- but the simplest regex I could think of at nearly 6am for capturing only non-escaped quotes is /(?:^|[^\\])(?:(?:\\\\)+|[^\\]|^)(?'quote'")/gm. Though, I just realized if the quotes are escaped I would want to double escape them, so actually replacing all quotes with escaped quotes should be fine, also another limitation of this method is lines can’t have trailing \