Author: Stan Eisenstat
Subject: Data structures for fiend
Date: Thursday, 10 Sep 2020, 08:56:59

The command-line arguments must be "parsed" before the
first traversal to check for errors (e.g., no argument
following -newer or -name).

The parsed output COULD include a data structure with
the list of files and/or a data structure with the
components of EXPRESSION.  The components COULD be
processed further (e.g., by combining the arguments to
each -exec into a separate data structure such as an
array or a string).  Or it COULD be argv[] itself.

All of these approaches work and require more or less
the same amount of code (the argv[] approach requires
slightly more since parsing is done in two places).
Pick the one that is easiest for YOU to understand and
implement.

--Stan-