ble getenv)
(define get-environment-variables getenv)
</pre>

<h1>Issues</h1>
<p>get-environment-variable is expected to return a "Scheme string".
Unfortunately, many current platforms, including POSIX-like ones, do
not require environment variables to be interpretable as sequences of
characters.  In particular, environment variables can be used to name
files, and filenames on the system can amount to NULL-terminated byte
vectors, which, if the Scheme program were to collect uninterpreted
and pass to, say, 