Hello,

if I can help, I could look at this also.
Some "cosmetics" (indentions, placing { on the line of 'if', ... ) could make the code more readable. These produce some greater patches without a gain in correctness but in maintainability.

Regards,
Bernhard Bitsch

> Gesendet: Mittwoch, 14. Februar 2018 um 23:12 Uhr
> Von: "Michael Tremer" <michael.tremer(a)ipfire.org>
> An: "Bernhard Held" <berny156(a)gmx.de>, development(a)lists.ipfire.org
> Betreff: Re: [PATCH v3 2/4] Network::network2bin: return an empty list in case of error
>
> Hello,
> 
> did you check if any other functions need to be changed in order to
> reflect this change?
> 
> Many functions use the output of this one.
> 
> -Michael
> 
> On Wed, 2018-02-14 at 20:35 +0100, Bernhard Held wrote:
> > 'return undef;' will always return a single value 'undef' even in list context.
> > 
> > sub foo { return undef }
> > if ( my @x = foo() ) {
> > 	print "oops, we think we got a result";
> > }
> > ---
> >  config/cfgroot/network-functions.pl | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/config/cfgroot/network-functions.pl b/config/cfgroot/network-functions.pl
> > index 070e14d0f..7cd56f799 100644
> > --- a/config/cfgroot/network-functions.pl
> > +++ b/config/cfgroot/network-functions.pl
> > @@ -139,7 +139,7 @@ sub network2bin($) {
> >  	my $netmask_bin = &ip2bin($netmask);
> >  
> >  	if (!defined $address_bin || !defined $netmask_bin) {
> > -		return undef;
> > +		return ();
> >  	}
> >  
> >  	my $network_start = $address_bin & $netmask_bin;
>