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crealpath (for "custom realpath") is a custom implementation of
realpath(3) that aims to work similarly to GNU's realpath(1). This
implementation is provided due to the following reasons:
- Future commits will require extracting an absolute path from a
relative path, and/or process relative components from a path, such as
".." or ".".
- realpath(3) is defined by POSIX.1-2008 as a XSI extension, and
extensions are generally avoided in this repository whenever possible.
- Additionally, realpath(3) requires the file or directory pointed to by
the path to exist, which might not always be the case for slcl.
- auth.c uses its own implementation to extract a dynamically allocated
string by repeatedly calling getcwd(3). Future commits will also
require this future, so it makes sense to keep it on a separate
component.
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