[systemd-devel] lastlog and friends

[Reindl Harald]

Am 29.07.2014 14:43, schrieb Karel Zak:
>  systemd TODO:
> 
>     - Replace utmp, wtmp, btmp, and lastlog completely with journal
> 
>  Can someone elaborate and provide more details, ideas, .. ?
> 
>  The current lastlog is sparse file and it's difficult to use for backup 
>  programs or integrity checkers, etc. So requests from users/customers
>  are pretty common.
>  
>  The idea (from someone from RH) is to have very simple and tiny
>  library that provides unified API for different backends (classic
>  lastlog, systemd journal, etc.) to keep applications portable.
>  Something like:
> 
>    https://github.com/marmolak/liblastlog2
> 
>  Frankly, I'd like to see something more than only lastlog, but also
>  utmp, wtmp support.
>  
>  Note that I'm not involved in the project, but as login(1), last(1),
>  ...  maintainer I'd like to see a public discussion about this topic.
> 
> 
>  Maybe all we need for things like lastlog and wtmp is journald and then 
>  a few #ifdef in applications like login(1), who(1) or PAM. Maybe it
>  would be better than add an extra abstraction layer (by any library).
>  Not sure, too many question :-)

please keep in mind that on servers "Storage=volatile" and forward
to classic rsyslog is common and that won't change - so whatever
you read from journal are only recent entries which won't survive
a reboot

additionally use journald in such setups means you get that
all to rsyslog forwarded and with no caution taken it will
land in /var/log/messages

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