Date: Mon, 12 Feb 2007 23:04:57 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-stable@FreeBSD.ORG, brooks@FreeBSD.ORG Subject: Re: Desired behaviour of "ifconfig -alias" Message-ID: <200702122204.l1CM4vBb089636@lurza.secnetix.de> In-Reply-To: <20070212184102.GD52751@lor.one-eyed-alien.net>
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Brooks Davis wrote:
> Oliver Fromme wrote:
> > True, not often, but sometimes. I had cases like that in
> > certain environments with bridged networks and arp proxies.
> >
> > I'm fine with your proposed syntax, as long as all the
> > existing ifconfig possibilities continue to be possible,
> > i.e. no regression.
>
> FWIW, it's HEAD and 6.1. We've actually got the aliases syntax labled
> as deprecated in the manpage.
Interesting, I wasn't aware of that. I'll update my
rc.conf where possible.
> We might want to add a feature to set the
> broadcast address.
Yes.
> > Yup, I agree, that's a PITA. That could be solved in the
> > shell code, though, by not enumerating until a number
> > doesn't exist, but instead looking at the set of all
> > shell variables that have been set, similar to this:
> >
> > set | grep "^ifconfig_${IFACE}_alias" | cut -f1 -d= | ...
>
> Unfortuanly grep in in /usr/bin so can't be used.
Well, ed is in /bin and can be used as a replacement for
grep; the syntax is just a little more awkward.
Or use the common IFS trick:
OLD_IFS="$IFS"
IFS="="
set | while read VAR VALUE; do
case "$VAR" in
ifconfig_${IFACE}_alias*)
...
;;
esac
done
IFS="$OLD_IFS"
> { while read _var; do
> _var=${_var%%=*}
> case $_var in
> ifconfig_${IFACE}_alias*)
> <...>
> ;;
> esac
> done } < `set`
Yup, that would work, too, except that you have to write
"set | while read _var; do ...". The "< `set`" will not
work.
Best regards
Oliver
--
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
Handelsregister: Registergericht Muenchen, HRA 74606, USt-Id: DE204219783
Any opinions expressed in this message are personal to the author and may
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