Process exit codes

[Grzegorz Dwornicki]

Thx for the tips :)
5 lut 2013 18:12, <Valdis.Kletnieks at vt.edu> napisał(a):

> On Tue, 05 Feb 2013 14:07:37 +0100, Grzegorz Dwornicki said:
>
> > I guess that there may be a better API that why this thread was created
> in
> > first place. My project goal is to make process checkpoints like cryopid
> > had. This is for my thesis and will be GPL for everyone after my
> > graduaction. I am researching this subject at this point.
>
> In that case, you want to go look at the checkpoint/restart patches that
> are
> already in the kernel, and in process.  Hint - it's a *lot* harder to do
> this
> right than a thesis project (unless you want to only do a very restricted
> subset, like "no open files", "no TCP connections", etc).  In fact, a lot
> of
> the 'namespace' stuff was added to help support C/R.  For instance, the PID
> namespace is there to deal with the fact that if you checkpoint a process
> with
> PID 23974, you need to be able to guarantee that it gets 23974 on restart
> (as
> otherwise you hit problems with getpid() and kill() not referring to the
> process you though it did). Of course, this majorly sucks if that PID is
> already in use. The solution there is to spawn a new, empty PID namespace
> to
> guarantee that number is available...
>
> https://ckpt.wiki.kernel.org/index.php/Main_Page  is a good place to
> start.
>
>
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