exec 3> /tmp/out
echo 'before exec' >&3
exec env2.pl
echo 'after exec' >&3
exec 3>&-
cat /tmp/out
   before exec
   after exec

##</code><code>##

export test=`perl -e 'print 'TURE'`

##</code><code>##

#!/usr/bin/env perl

$ENV{test} = 'TURE'; # calculate
my @cmd = ('command-exec', 'args');
system(@cmd); # spawn

# simple demo:
system('echo $test'); # prints what