Hi,
ext Aleksandr Koltsoff wrote:
> Michael Stepanov wrote:
>> when the SDL program crashed by some reason to run it again. What is the
>> most efficient way to periodically check something in the Maemo SDK?
If you exec it directly, just use wait/waitpid(). No need for polling.
> I think in your case it would be sufficient to do something like this:
> while true; do
> ./run-your-application params
> sleep 2
> done
>
> Or in C:
>
> while(1) {
> system("./run-your-application params");
> sleep(2);
> }
That would shorten the battery life. If one really needs/wants
to kludge things with polling, the interval should be several
times larger.
> Linux (kernel) does not have a non-polling mechanism to track
> PID-existance for non-related processes.
It has, you just need to be the process parent. :-)
> (adding this is not that hard,
> one hooks into the same logic that is used for BSD style process
> accounting, but this isn't present in stock kernel).
>
> Obviously you'll want to also check the reason why your application
> "crashed" and act on that (branching on the exit code) but that was
> omitted from the above snippets.
For a crazy hack (nothing you would offer for others),
one can install in Chinook a core dump handler (using
'|' in the /proc core pattern).
- Eero
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