On Tue, Jan 25, 2011 at 5:04 PM, David Collier
<[email protected]> wrote:
> I'm trying to get to grips with what the /etc/network/if-up.d ( and
> friends ) scripts are all about.
>
> As far as I can see they are automatically invoked by ifup and ifdown
>
> Is that the only thing that calls them?
>
> D
>
> ====================================================
>
> One thing that puzzles me - I see this
>
> run-parts /etc/network/if-down.d
> ifconfig lo 127.0.0.1 down
> run-parts /etc/network/if-post-down.d
>
> run-parts /etc/network/if-down.d
> ifconfig eth0 down
> run-parts /etc/network/if-post-down.d
>
> but how are the scripts in if-down.d to know if they are to run or not,
> assuming they actually only apply to a single interface?
$IFACE
> should it not do
>
> run-parts /etc/network/if-down.d -a lo
> ifconfig lo 127.0.0.1 down
> run-parts /etc/network/if-post-down.d -a lo
>
> run-parts /etc/network/if-down.d -a eth0
> ifconfig eth0 down
> run-parts /etc/network/if-post-down.d -a eth0
Only in "standard" ifup/down does that too.
> or is there some other environment variable that allows the scripts to
> work out if it's their own personal interface that's being operated on?
>
> I assume I can make, and maybe submit, a patch to this line
>
> buf = xasprintf("run-parts /etc/network/if-%s.d", opt);
>
> in ifupdown.c to add the "-a <interface>" which I think is such a good
> idea!
>
> ----------------------------------------------------
> by the way - in Config.in the help test for run-parts says you can
> exclude it - but if it's issued by ifup and ifdown, then won't that
> provoke errors?
Depends on whether you have third-party run-parts executable
in your system.
> config RUN_PARTS
> bool "run-parts"
> default y
> help
> run-parts is a utility designed to run all the scripts in a
> directory.
>
> It is useful to set up a directory like cron.daily, where you
> need to execute all the scripts in that directory.
>
> In this implementation of run-parts some features (such as report
> mode) are not implemented.
>
> Unless you know that run-parts is used in some of your scripts
> you can safely say N here.
--
vda
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