It's telling you exactly what's wrong - you have not specified any  
code for the -e option.

man perl:

SYNOPSIS
        perl [ -sTuU ] [ -hv ] [ -V[:configvar] ]
            [ -cw ] [ -d[:debugger] ] [ -D[number/list] ]
            [ -pna ] [ -Fpattern ] [ -l[octal] ] [ -0[octal] ]
            [ -Idir ] [ -m[-]module ] [ -M[-]'module...' ]
            [ -P ] [ -S ] [ -x[dir] ]
            [ -i[extension] ] [ -e 'command' ] [ -- ] [ programfile ]  
[ argu-
        ment ]...

In the code snippet I sent I specified some code that tried to pull  
in the Socket module (I just copied the first two perl lines of  
David's script):

$ perl -e 'use strict; use Socket; print("hello\n");'

perl -e on its own will raise the error you have seen.

If a module is missing you will get something along the lines of:

perl -e 'use no-such-module;'
Can't locate no.pm in @INC (@INC contains: [cut blah-blah-blah]) at - 
e line 1.
BEGIN failed--compilation aborted at -e line 1.

But we are wandering well outside the realms of OpenBSD and into  
perl.  Try http://www.perlmonks.org/ or http://www.perl.com/ as  
starting points.

On 19/09/2007, at 3:21 AM, pichi wrote:

quoted text
> The Socket module should also be there:
>
> $ perl -e 'use strict; use Socket; print("hello\n");'
> hello
>
>
> Thanks,
>
> I have perl installed:
>
> $perl -v
>
> $This is perl, v5.8.8 built for i386-openbsd
>
> but it looks like I dont have the socket module becuase when I do:
>
> $perl -e
>
> I get:
>
> $No code specified for -e.
>
> How can I add that module, and again, is is it safe for a publically
> accessable firewall?
>
> Many thanks from the newby,
>
> Pedro
>
>
> -- 
> View this message in context: http://www.nabble.com/Define-hosts- 
> lookup-for-pf.conf-tf4469900.html#a12759409
> Sent from the openbsd user - misc mailing list archive at Nabble.com.