dhcpcd-discuss

On 01/02/18 22:15, Sven Kirmess wrote:
> On Thu, Feb 1, 2018 at 12:44 AM, Roy Marples <roy@xxxxxxxxxxxx 
> <mailto:roy@xxxxxxxxxxxx>> wrote:
>
>
>     Don't beat around the bush, just reload it on actions.
>
>     case "$reason" in
>              INFORM6|BOUND6|RENEW6|REBIND6|REBOOT6) reload_shorewall;;
>     esac
>
>
> That was what I was looking for, the correct list of actions. Thanks!

man page dhcpcd-run-hooks(8) is your friend.

>     I don't know Shorewall, or Linux firewalls for that matter.
>     But NPF on NetBSD allows reloading without terminating existing
>     connections which is probably what you need.
>
>
> Yes, that works the same with Shorewall.
>
> Reloading Shorwall takes 1 minute on my system. Are the hooks in 
> /libexec/dhcpcd-hooks guaranteed to only run one at a time? Or do I have 
> to add locking myself?
>
> And is it a problem for dhcpcd if one of the hook scripts runs for a minute?

Nothing in dhcpcd is threaded and dhcpcd will block until the script is 
done.
So this is only a problem for you if your lease lasts less than a minute.

Roy