[vdr] multiple instances

[Ronnie Brunn <brunn@rbg.informatik.tu-darmstadt.de>]

Hi folks,


I went into the recordings menu and wanted to delete a certain 
recording. VDR stated that the recording could not be deleted. I tried a 
few times and everytime there was the red error message and all my 
recordings were shown unharmed with the recording I wanted to delete 
still there.
I tried to start playback to find out whats so strange about the file it 
could not be deleted and suddenly the screen went black and the channel 
got resynced. I went back into the menu and all but three of my 
recordings had vanished.

I investigated and found out that I managed to start a second instance 
of VDR which also listened to the same LIRCD and deleted one file after 
the other while I was only shown the printout of the other instance that 
controlled the primary DVB card (in fact the only one in the computer)

Vdr started without the slightest notification about it being called 
twice with identical video-directory, primary card and both instances 
listening to the same Lircd.

I believe in 99% of all cases the user does not want VDR to be 
instantiated more than one time on the same machine. He definetly does 
not want to have two instances listening to the same LIRCD.

I think VDR should be atomic by default - means it should quit with an 
error message if the user tries to call it a second time.
(Perhaps if some people do want it running more than one time - on 
another DVB-card as primary with another config-directory - that should 
still be possible with a special command line option.)

But most important - vdr should never attach a second time to the same 
LIRCD, in fact vdr should not react to remote commands if it has no 
primary device it can give feedback to.

CU
Ronnie
--------------------------------------------------
Technische Universität Darmstadt
Fachbereich Informatik
Fachgebiet Simulation und Systemoptimierung
Darmstadt Dribbling Dackels
http://www.sim.informatik.tu-darmstadt.de/robocup