Lockfiles have their own problems but don't any better option. IPC is an
option but it's got worse problems.
How about a time-delayed lockfile that prevents running a copy of Tux
Paint for 30 seconds from the last launch attempt? That prevents
excessive clicks, but most problems caused by lockfiles (like stale lock
files) go away.
A couple issues I see:
1. Locking files via flock() over the network doesn't work.
2. We can find ways around #1, but we gotta be careful not to lock
out everyone else on the network with a bad work-around.
Just my 2 cents!
-Mark
On Wed, 11 Aug 2004, Bill Kendrick wrote:
> I've been asked:
> >
> > Is there any way to check to see of tuxpaint is already running
> > before launching it again? Maybe prompt 'Tux Paint is already
> > running, do you really want to run it again?' My kids get so
> > excited about getting into it, they just keep clicking! Sometimes
> > it is running six times on one ancient desktop before they realize
> > what they've done. It doesn't take too many of these hang ups for
> > most kids to get the idea, but some just don't figure out that
> > clicking will not make it load faster (special needs kids.)
>
> I'm imagining ways this could be done with a shell script, "ps" and
> kdialog or xmessage under Linux/Unix, but that's not exactly portable.
>
> Should we add some 'lockfile' code to the app itself?
>
> -bill!
> [EMAIL PROTECTED] "Avoid missing ball for high score"
> http://www.newbreedsoftware.com/
> New Breed Software
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