Re: [Xen-devel] Xen scripts rewrite

[Roger Pau Monnà <roger.pau@xxxxxxxxxxxxx>]

2012/3/1 Mark <mark+lists@xxxxxxxxxxxxxx>:
> Greetings,
>
> I am trying to wrap my head around the xen scripts in /etc/xen/scripts.
> I am currently looking at locking.sh but I don't really understand what
> it is doing.
>
> I see that claim_lock has a while loop, it seems to wait until it can
> write its own PID to $lockdir/owner. If the file $lockdir/owner exists,
> check if the pid is still running. If it's still running when the
> loop is done, steal the lock by writing $$ to $lockdir/owner anyway.
>
> Anyway. Can someone please further explain this file in plain English
> and detail. Am I right with my above assumptions, and when are locks
> even used?
>
> As said, I request as much detail as possible - the rewrite is to
> improve efficiency, readability and user customisation. As it is now
> you have too much functions that confuse me silly.
>
> If I am succesful I will share the outcome, so there's an incentive if
> you need one.

If you can, could you also clean the scripts of bashisms? so all of
them use /bin/sh. Now some of them use /bin/sh and some use /bin/bash
and I don't really like to install bash just for launching some
hotplug scripts.

> Thank you,
> Mark
>
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