Subject: Re: increasing UT_HOSTSIZE for IPv6?
To: Bill Sommerfeld <firstname.lastname@example.org>
From: Johan Danielsson <email@example.com>
Date: 07/26/1999 18:36:13
Bill Sommerfeld <firstname.lastname@example.org> writes:
> As others have stated, utmpx is just utmp with bigger field lengths.
> This is the Wrong Answer.
It's not necessarily the Right Answer, but I wouldn't call it the
Wrong Answer either.
> Something closer to the right answer involves defining a new API for
> reading utmp/wtmp, and revving the existing utmp-updating API
> (-lutil's login/logout/logwtmp) to keep the old files up to date so we
> don't really need a "/dev/utmp" to hallucinate the old file.
> There's existing prior art for this (there's the getut*/putut* calls
> in solaris), but unfortunately they just use the existing "struct utmp"
> with its fixed-length fields.
Yes, this is what applications that grovel around in utmp expect. I'm
surprised that those functions doesn't exist already. Having yet
another different implementation of utmp* is not going to help the
> - for network logins, both the hostname and the sockaddr should be
> logged, since the address<->host binding varies over time, and logging
> the client port number and, for V6, the interface index is also
> - I'd use db for the utmp and lastlog replacement (utmp keyed by
> "line", while lastlog keyed by either uid or login name),
Why use a database for this? The task is so simple that you don't
really need it, and (as others have pointed out) DB has it's
> and a plain text file for the wtmp replacement.
Isn't it a good idea to keep utmp and wtmp in the same format? If you
just want a text file, what's wrong with syslog?