Date: Fri, 9 Feb 2007 16:29:25 -0600 From: Brooks Davis <brooks@freebsd.org> To: Kevin Way <kevin@insidesystems.net>, freebsd-stable@freebsd.org Subject: Re: Desired behaviour of "ifconfig -alias" Message-ID: <20070209222925.GB11826@lor.one-eyed-alien.net> In-Reply-To: <20070209214908.GA64090@icarus.home.lan> References: <45CCE270.7080704@insidesystems.net> <20070209214908.GA64090@icarus.home.lan>
next in thread | previous in thread | raw e-mail | index | archive | help
--qcHopEYAB45HaUaB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Feb 09, 2007 at 01:49:08PM -0800, Jeremy Chadwick wrote: > On Fri, Feb 09, 2007 at 04:06:56PM -0500, Kevin Way wrote: > > I recently ran into a bug in the jail startup scripts that caused this > > command to be executed: > >=20 > > ifconfig bce0 -alias > >=20 > > It turns out that this command eliminated the primary IP for the device. > >=20 > > man ifconfig defines the behavior of -alias to be: > >=20 > > -alias Remove the network address specified. This would be used > > if you > > incorrectly specified an alias, or it was no longer needed= =2E If > > you have incorrectly set an NS address having the side > > effect of > > specifying the host portion, removing all NS addresses will > > allow > > you to respecify the host portion. > >=20 > >=20 > > I can't help but wonder if it would be better behavior to throw an error > > when no > > argument is supplied. > >=20 > > The only discussion I found of this in a quick search of the archives > > was a post in > > 2004 which noted that the fxp driver actually deletes all IP addresses, > > but there was > > no significant follow-up. > >=20 > > Should ifconfig throw an error if no address is supplied? >=20 > My vote is for either 1) an error, or 2) delete all of the aliases > associated with that interface. If I had a preference, I'd choose #1. >=20 > I'd argue that -alias doing what you described (removing the non-aliased > IP bound to the iface) when no inet/inet6 arguments are suppied is > indeed a bug. It's way to late to make this change. This is known behavior and has been for ages. If there's a bug it's in the documentation. -- Brooks --qcHopEYAB45HaUaB Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFFzPXEXY6L6fI4GtQRAkkSAKCpoWo/7D2EAjsiBowRgL7qTzk/mgCgj/43 zzn/eglfGIxnf3xjrUJpyMk= =JG0P -----END PGP SIGNATURE----- --qcHopEYAB45HaUaB--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070209222925.GB11826>