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From: amr@dukee.egr.duke.edu (Anthony M. Richardson)
Newsgroups: comp.sys.amiga
Subject: Need help using eval in scripts
Message-ID: <918@cameron.egr.duke.edu>
Date: 28 May 90 14:13:11 GMT
Sender: news@egr.duke.edu
Lines: 22

I'll probably feel pretty silly for not being able to figure this out
myself, but I've already gone well beyond my frustration level...

How does one use eval if you want to read one of the parameters from
an input file (or environment variable)?  The 1.3 manual (the little
white book) I have says you can do this and even gives an example
that goes something like (from memory)

  eval < t:qwe value2=1 op=- to env:loop

This is supposed to decrement the value in qwe and store the new value
in loop and allows you to do loops.  I've tried this and can't get
it (or any seemingly logical permutations to work).

Can anyone help?

Thanks in advance,
Tony

p.s. I already know that several PD and commercial shells can do this
quite easily, but I really want to know how to do it with eval and the
standard commodore shell.