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al_make_path_canonical(3)                            al_make_path_canonical(3)

NAME
       al_make_path_canonical - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro.h>

              bool al_make_path_canonical(ALLEGRO_PATH *path)

DESCRIPTION
       Removes any leading '..' directory components in absolute paths.
       Removes all '.' directory components.

       Note that this does not collapse "x/../y" sections into "y".  This is
       by design.  If "/foo" on your system is a symlink to "/bar/baz", then
       "/foo/../quux" is actually "/bar/quux", not "/quux" as a naive removal
       of ".." components would give you.

Allegro reference manual                             al_make_path_canonical(3)