On Mon, Apr 28, 2003 at 10:34:56PM +0200, Alexander Neundorf wrote:
> a user of the lisa daemon(kdenetwork/lanbrowsing/lisa) asked for a pid-file 
> feature for lisa.
> How do I implement this correctly ?
>
i suggest you look at kdm/backend/dm.c

> On my system a bunch of pidfiles are under /var/run/.
>
yes

> AFAIK a pidfile is a simple text file which contains the pid of the daemon 
> process.
>
yup

> I guess I should create it as soon as the daemon starts
>
... and lock it ...

> and write the pid
>
yup

> and delete it when the daemon is killed ?
>
no need to. it can't hurt, though.

> Then the pidfile will be left over when the daemon was killed by
> SIGKILL. Is this the correct behaviour ?
> 
yes. that's why you should rely on locking and not on existence. locks
are bound to processes, files aren't.

> I guess "normal" ownership and 0644 permissions should be ok, right ?
> 
sure

greetings

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