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From: Marc van Dongen <dongen@cs.ucc.ie>
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Subject: Re: metapost not invoked? mpgraph.1 not created
Date: Wed, 21 Feb 2001 17:17:37 +0000
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Ed L Cashin (ecashin@coe.uga.edu) wrote:

: That's not true for Bourne-style shells:
: 
:     $ foo=hi
:     $ perl -e 'print $ENV{"foo"} . "\n"'
:     
:     $ export foo
:     $ perl -e 'print $ENV{"foo"} . "\n"'
:     hi
:     $ foo=hi,there
:     $ perl -e 'print $ENV{"foo"} . "\n"'
:     hi,there

It *is* for Bourne-style shells. If you run perl like
you do, foo is dereferenced in the current shell.

$ cat mytest
#!/bin/sh
echo ${MYVAR}
$ MYVAR=howsagoin
$ echo ${MYVAR}
howsagoin
$ mytest

$ export MYVAR
$ mytest
howsagoin
$

Regards,

Marc