Is there a Perl shell?

In general, not yet. There is psh available at

    http://www.focusresearch.com/gregor/psh

Which includes the following description:

    The Perl Shell is a shell that combines the interactive nature
    of a Unix shell with the power of Perl. The goal is to eventually
    have a full featured shell that behaves as expected for normal
    shell activity. But, the Perl Shell will use Perl syntax and
    functionality for control-flow statements and other things.

The Shell.pm module (distributed with Perl) makes Perl try commands which aren't part of the Perl language as shell commands. perlsh from the source distribution is simplistic and uninteresting, but may still be what you want.

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