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Re: get absolute path of given path

From: Zelphir Kaltstahl
Subject: Re: get absolute path of given path
Date: Mon, 7 Sep 2020 01:39:09 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Icedove/68.10.0

Hi Matt!

On 06.09.20 17:20, Matt Wette wrote:
> On 9/6/20 8:04 AM, Zelphir Kaltstahl wrote:
>> Hi Guile Users!
>> In my explorations into making examples for web development, I came
>> across the question of how to get an absolute path from any given path.
>> This is useful for example when checking, whether a path points to
>> something inside a static assets directory, or perhaps sneakily tries to
>> escape that and access things it should not.
>> I found in Guile's manual the function (canonicalize-path path).
>> However, this function has one problem, which makes it not sufficient on
>> its own: It raises an exception, when a path given points to something
>> that does not exist. I would like to have a function, that gives me the
>> absolute path of any path I give as argument, not only for existing
>> paths. So i went ahead and wrote the following code
>> (
> Maybe you would like false-if-exception.

This I definitely did not know and it seems like it would fit perfectly
for my use-case. Thank you!



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