Clearing /var/tmp on boot
Pegasus Mc Cleaft
ken at mthelicon.com
Mon Dec 28 00:22:45 UTC 2009
On Sunday 27 December 2009 23:07:09 Doug Barton wrote:
> Pegasus Mc Cleaft wrote:
> > Hello Current..
> >
> > While checking over my system (9-CURRENT AMD64) I was a bit surprised to
> > find tons of old files that were hanging around in my /var/tmp that were
> > never deleted/cleaned out. Most of the offenders were dbus, KDE and PCSCD
> > files. To be honest, I never really checked the /var/tmp directory as I
> > normally use the /tmp for generic stuff (unpacking archives, etc). I was
> > wondering if there should be a startup rc script that cleans this
> > directory as well.
>
> <from Doug>
> No, there should not. If you look at hier(7) it says this about
> /var/tmp: temporary files that are kept between system reboots
>
> <from Jilles>
>Like all temporary directories, it is a good idea to clean stale files
>from /var/tmp, but hier(7) explicitly says that /var/tmp is not cleared
>on reboot. In particular, nvi's recovery system puts files in
>/var/tmp/vi.recover/ and assumes they will not be deleted by a reboot
>(see /etc/rc.d/virecover).
Thanks Doug and Jilles,
I hadent thought about that and now that I see the man page, I understand. I
think I will implement what Julles suggested and change the script in my
/usr/local/etc/rc.d to clear out the files after some period of time so that
really old (and hopefully useless) items are deleted.
In my particular setup, it is rare that I do anything in vi, aside from quick
config changes and wouldn't be to upset if the system crashed (or got a
SIGHUP) in the middle of one and I lost the work in progress.
It does make me wonder why some applications would choose to use a temp
directory with persistence over reboots when you wouldn't think it would be
necessary (like dbus) but I understand that this is not a FBSD issue.
Thanks again for you advice,
Peg
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