Coding problem with sysfs

[Christian Gmeiner]

Hi Mailling list.

i have tried to wirte a sysfs patch for the dvb-driver. It seems very nice,
but i am _not_ able
to access and work with the devices.

Now i have run some tests:

1. Only register the adapter, the other functions are commented out

vdr root # ls -R /sys/class/dvb
/sys/class/dvb:
adapter0

/sys/class/dvb/adapter0:
frontend  name

And i can access the infos:
vdr root # cat /sys/class/dvb/adapter0/frontend
STV0299/TSA5059/SL1935 based
vdr root # cat /sys/class/dvb/adapter0/name
KNC1 DVB-S

Looks nice....

2. Enabled full sysfs support

vdr root # ls -R /sys/class/dvb
/sys/class/dvb:
adapter0

/sys/class/dvb/adapter0:
demux0  dvr0  frontend  frontend0  name  net0

/sys/class/dvb/adapter0/demux0:
adap  dev

/sys/class/dvb/adapter0/dvr0:
adap  dev

/sys/class/dvb/adapter0/frontend0:
adap  dev

/sys/class/dvb/adapter0/net0:
adap  dev


vdr root # ls -Rl /dev/dvb
/dev/dvb:
total 0
drwxr-xr-x  2 root root 0 Jun  1 00:10 adapter0

/dev/dvb/adapter0:
total 0
crw-rw----  1 root video 250, 7 Jun  1 00:10 adapter0
crw-rw----  1 root video 250, 4 Jun  1 00:10 demux0
crw-rw----  1 root video 250, 5 Jun  1 00:10 dvr0
crw-rw----  1 root video 250, 3 Jun  1 00:10 frontend0
crw-rw----  1 root video 250, 7 Jun  1 00:10 net0


Ok... /dev/dvb/adapter0/adapter0 shouldn't exist and i have an other problem

vdr root # ls /dev/dvb/adapter0/frontend0
/dev/dvb/adapter0/frontend0
vdr root # cat /dev/dvb/adapter0/frontend0
cat: /dev/dvb/adapter0/frontend0: No such device or address


If i am using devfs i get here:

vdr root # cat /dev/dvb/adapter0/frontend0
cat: /dev/dvb/adapter0/frontend0: invalid arguments

Maybe somebody can help me.
Atteched are the needed sysfs files.

Thanks,
Christian Gmeiner

Attachment: dvbdev.h
Description: Binary data

Attachment: dvb_sysfs.c
Description: Binary data