[linux-dvb] Re: How to check signal after szap?

[emard@softhome.net]

Jiri Netopil writes: 
> I am making a bash script for tunning DVB Nova card. I am using szap for
> tunning and I would like to check if there is signal after szaping to
> desired channel (because I would like to tune to the previous used channel
> when there is no signal). Of course it can be recognised from the szap
> output to screen (FE_HAS _LOCK or somehow like this), but it cannot be
> tested in script. I have been trying several things such as redirect the
> output from szap to file, to check the data in /dev/dvb/adapter0/dvr0 and so
> on, but without any success. I am new in Linux and I already tried all my
> few ideas. 
> Does anyone have any idea here?
I do. szap has to be patched a bit in order that it returns
after successful tuning. I posted a patch but it should be
a bit more intelligent (it should check for 5-6 ber=0 in
succession instead of just one). 
After szap exits, FE will remain active for 3 seconds
so there can follow some short dvr read, e.g. alevt-date
or similar call with the card still active during this
3 seconds. 
Emard 

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