LSB init scripts and NETWORKING=no && exit 0
Thomas M Steenholdt
tmus at tmus.dk
Tue Jul 10 02:33:28 UTC 2007
Ville Skyttä wrote:
> On Sunday 08 July 2007, Steven Pritchard wrote:
>> On Sun, Jul 08, 2007 at 05:04:08PM +0300, Ville Skyttä wrote:
>>> Actually, all of 1) silent exit and 2) the zero exit value and 3) the way
>>> "is networking up?" is checked seem questionable to me. Anyone have
>>> ideas for better approaches to this?
>> Isn't that just supposed to be checking if networking is enabled at
>> all? If that is "no", presumably we don't even have the loopback
>> interface up.
>
> Hard to tell, but that's just one bit of the puzzle. To elaborate on the
> issues:
>
> a) Why doesn't it output an error message saying that the service requires
> networking but networking doesn't seem to be available?
>
> b) Why is the exit status 0, indicating success?
>
> c) Why is the check done before doing anything else instead of being done eg.
> only in the start (and restart, reload and friends if they're not implemented
> using start) action? That and b) will result in eg. the status action
> returning 0, indicating in LSB terms "program is running or service is OK"
> which it most likely is not if it requires networking and networking isn't
> up.
>
> d) Why does it just read something from a config file instead of actually
> checking whether networking is up? Not sure if that check is necessary in
> the first place - could just let the service fail. Maybe it's used/useful
> for optimization purposes and/or to provide a hook for a more descriptive
> error message than what the failing service would output.
>
It might be a good idea to start looking at a nice way to handle network
service deps. This could easily be cleaned at the same time.
/Thomas
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