network.subr _aliasN handling

[dteske at FreeBSD.org]

> -----Original Message-----
> From: Tom Evans [mailto:tevans.uk at googlemail.com]
> Sent: Friday, February 21, 2014 9:16 AM
> To: Devin Teske
> Cc: rc at freebsd.org
> Subject: Re: network.subr _aliasN handling
> 
> On Sat, Jan 4, 2014 at 11:25 AM, Teske, Devin <Devin.Teske at fisglobal.com>
> wrote:
> > On Jan 4, 2014, at 2:59 AM, Jason Hellenthal wrote:
> >
> >> I believe I know what you mean by that but in a way scares me when you
say
> sort as in mixing up the original order they appear in which I would find
to be
> really unattractive to most.
> >>
> >
> > It's not as scary as it sounds.
> >
> > The issue is that the variables are sorted alphabetically, instead of
> > numerically.
> >
> > Let's take four words: foo1, foo2, foo10, and foo20.
> > If you sort them alphabetically, you get:
> >
> >         foo1
> >         foo10
> >         foo2
> >         foo20
> >
> > You'll notice this when doing a directory listing, as that too is
> > sorted alphabetically.
> >
> > This is why "alias14" is run before "alias8" and "alias9". Because
> > they are processed in alphabetically sorted order. I didn't do
> > anything to sort the values, they came pre-sorted in alphabetic order.
> >
> > If I simply throw in a "| sort -n", then it will change it to
numerically sorted.
> > As you might expect, numerically sorting the above list would result in:
> >
> >         foo1
> >         foo2
> >         foo10
> >         foo20
> >
> > Trivial really. I'll throw a patch at you when I get some cycles (soon).
> 
> Wouldn't "|sort -n" sort foo10 before foo2?
> 

[Devin Teske] 

Looks like what the OP wanted was "| sort -nk1.4" where the "4" is
specific to "foo" prefix (we want sort to start on the 4th character of
field 1; where the number starts).
-- 
Devin

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