Date: Fri, 10 Sep 2004 12:34:46 -0700 From: Brooks Davis <brooks@one-eyed-alien.net> To: Max Laier <max@love2party.net> Cc: freebsd-net@freebsd.org Subject: Re: original interface name? (5.*) Message-ID: <20040910193446.GC28085@odin.ac.hmc.edu> In-Reply-To: <200409102130.20287.max@love2party.net> References: <20040910191831.GP89036@lucky.net> <200409102130.20287.max@love2party.net>
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--ZmUaFz6apKcXQszQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Sep 10, 2004 at 09:30:11PM +0200, Max Laier wrote: > On Friday 10 September 2004 21:18, Valentin Nechayev wrote: > > Hi, > > is there a stable way to determine original interface name (before > > any renaming) in 5.3? I.e. as driver + sequence number? >=20 > From inside the kernel you can use ifnet.if_dname + ifnet.if_dunit, from = the=20 > userland I don't know if it's possible to get a look at those fields. >=20 > In any way, I suggest not to do that. ifnet.if_xname is supposed to be *t= he*=20 > name of the interface. There is no such thing as "original name". Yes, for that matter, the name should not be considered to be a reliable handle to an interface unless you know it won't change. This means it's OK for rc.conf or ifconfig, but not OK for a long running, general purpose monitoring program. In 6-CURRENT, and hopefully 5.3, the correct unique identification of an interface will be its index and the value of ifi_epoch. -- Brooks --=20 Any statement of the form "X is the one, true Y" is FALSE. PGP fingerprint 655D 519C 26A7 82E7 2529 9BF0 5D8E 8BE9 F238 1AD4 --ZmUaFz6apKcXQszQ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFBQgHVXY6L6fI4GtQRAnaPAKC/IivPwR3ixhHdmDq5WbftElmfoACcCXO9 xCdUSJGUxvx75CRZnq7LbUU= =0Wum -----END PGP SIGNATURE----- --ZmUaFz6apKcXQszQ--
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