I'm using GetOptions but my non-option callback routine isn't being called. What's wrong with my code, wise monks? 
my $convert = 0;
my $export = 0;
my $exportfile = "";
...

GetOptions(
    "convert"       => \$convert,
    "export"        => \$export,
    "exportfile=s"  => \$exportfile,
    "<>"            => \&badarg,
);
...

sub badarg
{
    my $badparm = $_[0];
    print"badarg $badparm\n";
}

[download]
The GetOptions call prints "unknown option: blah" but badarg() isn't called. If the "<>" line is removed, then GetOptions still seems to swallow all the option, rather than leaving unmatched options in @ARGV.
("This is perl, v5.8.4 built for MSWin32-x86-multi-thread" ActivePerl Build 810)

Edit: after jimbojones' hint about pass_though, I find that the callback works iff pass_through is used! (but NOT permute) thanks all!

In reply to GetOptions non-option callback by anadem

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