Operating system environment variables are not directly accessible, no,
although any that beging FACTER_ will be imported as facts (so that
"%FACTER_EXAMPLE%" is available as "$example". You can create your own
custom facts to import any others that you want. See here:
http://projects.puppetlabs.com/projects/puppet/wiki/Environment_Variables_Patterns
--
Bruce
The ice-caps are melting, tra-la-la-la. All the world is drowning,
tra-la-la-la-la. -- Tiny Tim.