Are system updates without reboots possible?
kraduk at gmail.com
Thu Mar 10 15:18:00 UTC 2016
>From what i remember there is an equivalent of linux pivot mount coming in
freebsd 11. Doing that technically isn't a reboot, but it will definitely
ensure everything is restarted.
Is there any motive to this though, as the safest way is to create a new
boot env with the new patched stuff in, and then reboot. You have fail back
then, incase of issues.
On 10 March 2016 at 14:38, Kevin P. Neal <kpn at neutralgood.org> wrote:
> On Thu, Mar 10, 2016 at 12:04:05PM +0000, Arthur Chance wrote:
> > The latest security advisory on openssl contains the usual mantra
> > "Restart all deamons using the library, or reboot the system."
> > I usually just reboot but find myself wondering if there's a reliable
> > *automatic* way of identifying which running programs use any given
> > library (or set of libraries), and identify whether or not they're
> > daemons controlled by service(8).
> > I suppose root could use ps and ldd to identify affected programs, but
> > this seems like brute force and I can't see how to tie into the
> > service(8) structure.
> > Anybody got ideas on this? It could be useful for updating servers you'd
> > rather not reboot.
> You can use lsof to see which processes have a library open. If they're
> using the library then they'll have it open.
> This does nothing to help connect back to service(8), however.
> Kevin P. Neal http://www.pobox.com/~kpn/
> "Nonbelievers found it difficult to defend their position in \
> the presense of a working computer." -- a DEC Jensen paper
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