local %ENV = %ENV;
$ENV{TERM} = 'vt220';

[download]

No need to localize the entire hash to alter just one value. You can localize single elements of hashes and arrays:

{
    local $ENV{TERM} = 'vt220';
    `/usr/sbin/iptraf -s eth0 -B -L some.log`;
}

[download]

Exiting the block will restore the old contents of the hash or array, making the element reappear if it was deleted:

my %letters = 'a'..'h';
my @nums = 0..8;
{
  local $letters{'c'}; delete $letters{'c'};
  local $nums[4];      @nums = ();
}
use Data::Dumper;
print Data::Dumper->Dump (
  [\%letters, \@nums],
  ['letters', 'nums']
);
__END__
$letters = {
             'e' => 'f',
             'c' => 'd',
             'a' => 'b',
             'g' => 'h'
           };
$nums = [
          undef,
          undef,
          undef,
          undef,
          4
        ];

[download]

This is all documented in perlsub.

--
David Serrano

In reply to Re^2: Problem running IPTraf from Perl by Hue-Bond
in thread Problem running IPTraf from Perl by Anonymous Monk

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