Howto obtain sysfs-pathes for DVB devices?

Howto obtain sysfs-pathes for DVB devices?

[Carsten Meier]

Hello again,

now I've managed to obtain syfs-pathes for v4l2-devices. But what about
dvb? I haven't found something like bus_info in the dvb-api-docs. (I'm
new to it) Any hints for this?

Thanks,
Carsten

Re: Howto obtain sysfs-pathes for DVB devices?

[hermann pitton]

Hi,

Am Mittwoch, den 28.01.2009, 16:46 +0100 schrieb Carsten Meier:
> Hello again,
> 
> now I've managed to obtain syfs-pathes for v4l2-devices. But what about
> dvb? I haven't found something like bus_info in the dvb-api-docs. (I'm
> new to it) Any hints for this?
> 
> Thanks,
> Carsten

I'm also still new on it ...

Maybe anything useful here?

cat /sys/class/dvb/dvb0.frontend0/uevent
MAJOR=212
MINOR=0
PHYSDEVPATH=/devices/pci0000:00/0000:00:08.0/0000:01:07.0
PHYSDEVBUS=pci
PHYSDEVDRIVER=saa7134

Cheers,
Hermann

Re: Howto obtain sysfs-pathes for DVB devices?

[Carsten Meier]

Am Fri, 30 Jan 2009 03:07:07 +0100
schrieb hermann pitton <hermann-pitton@arcor.de>:

> Hi,
> 
> Am Mittwoch, den 28.01.2009, 16:46 +0100 schrieb Carsten Meier:
> > Hello again,
> > 
> > now I've managed to obtain syfs-pathes for v4l2-devices. But what
> > about dvb? I haven't found something like bus_info in the
> > dvb-api-docs. (I'm new to it) Any hints for this?
> > 
> > Thanks,
> > Carsten
> 
> I'm also still new on it ...
> 
> Maybe anything useful here?
> 
> cat /sys/class/dvb/dvb0.frontend0/uevent
> MAJOR=212
> MINOR=0
> PHYSDEVPATH=/devices/pci0000:00/0000:00:08.0/0000:01:07.0
> PHYSDEVBUS=pci
> PHYSDEVDRIVER=saa7134
> 
> Cheers,
> Hermann
> 
Hi,

IMHO there is no other way (not counting other daemons) than scanning
the dvb-device-files, stat() them, and compare major and minor numbers
with sysfs-contents. Anyway, I think I'll switch to HAL for that...

Cheers,
Carsten

Re: Howto obtain sysfs-pathes for DVB devices?

[Matthias Schwarzott]

On Freitag, 30. Januar 2009, Carsten Meier wrote:
> Am Fri, 30 Jan 2009 03:07:07 +0100
>
> schrieb hermann pitton <hermann-pitton@arcor.de>:
> > Hi,
> >
> > Am Mittwoch, den 28.01.2009, 16:46 +0100 schrieb Carsten Meier:
> > > Hello again,
> > >
> > > now I've managed to obtain syfs-pathes for v4l2-devices. But what
> > > about dvb? I haven't found something like bus_info in the
> > > dvb-api-docs. (I'm new to it) Any hints for this?
> > >
> > > Thanks,
> > > Carsten
> >
> > I'm also still new on it ...
> >
> > Maybe anything useful here?
> >
> > cat /sys/class/dvb/dvb0.frontend0/uevent
> > MAJOR=212
> > MINOR=0
> > PHYSDEVPATH=/devices/pci0000:00/0000:00:08.0/0000:01:07.0
> > PHYSDEVBUS=pci
> > PHYSDEVDRIVER=saa7134
> >
> > Cheers,
> > Hermann
>
> Hi,
>
> IMHO there is no other way (not counting other daemons) than scanning
> the dvb-device-files, stat() them, and compare major and minor numbers
> with sysfs-contents. Anyway, I think I'll switch to HAL for that...
>

One way of asking udev is this:
udevadm info -q path -n /dev/dvb/adapter0/frontend0

Regards
Matthias

Re: Howto obtain sysfs-pathes for DVB devices?

[Carsten Meier]

Am Fri, 30 Jan 2009 12:51:03 +0100
schrieb Matthias Schwarzott <zzam@gentoo.org>:

> On Freitag, 30. Januar 2009, Carsten Meier wrote:
> > Am Fri, 30 Jan 2009 03:07:07 +0100
> >
> > schrieb hermann pitton <hermann-pitton@arcor.de>:
> > > Hi,
> > >
> > > Am Mittwoch, den 28.01.2009, 16:46 +0100 schrieb Carsten Meier:
> > > > Hello again,
> > > >
> > > > now I've managed to obtain syfs-pathes for v4l2-devices. But
> > > > what about dvb? I haven't found something like bus_info in the
> > > > dvb-api-docs. (I'm new to it) Any hints for this?
> > > >
> > > > Thanks,
> > > > Carsten
> > >
> > > I'm also still new on it ...
> > >
> > > Maybe anything useful here?
> > >
> > > cat /sys/class/dvb/dvb0.frontend0/uevent
> > > MAJOR=212
> > > MINOR=0
> > > PHYSDEVPATH=/devices/pci0000:00/0000:00:08.0/0000:01:07.0
> > > PHYSDEVBUS=pci
> > > PHYSDEVDRIVER=saa7134
> > >
> > > Cheers,
> > > Hermann
> >
> > Hi,
> >
> > IMHO there is no other way (not counting other daemons) than
> > scanning the dvb-device-files, stat() them, and compare major and
> > minor numbers with sysfs-contents. Anyway, I think I'll switch to
> > HAL for that...
> >
> 
> One way of asking udev is this:
> udevadm info -q path -n /dev/dvb/adapter0/frontend0
> 
> Regards
> Matthias

Ok, then I think I'm gonna use it... :) It's much more simple than
struggling through dbus-/hal-libs and the various unfinished c++
bindings, although I normally don't like to start system-tools from c++.
Or is there any c-api for it? I haven't found one.

Thanks,
Carsten

Re: Howto obtain sysfs-pathes for DVB devices?

[Matthias Schwarzott]

On Freitag, 30. Januar 2009, Carsten Meier wrote:
> Am Fri, 30 Jan 2009 12:51:03 +0100
> >
> > One way of asking udev is this:
> > udevadm info -q path -n /dev/dvb/adapter0/frontend0
> >
> > Regards
> > Matthias
>
> Ok, then I think I'm gonna use it... :) It's much more simple than
> struggling through dbus-/hal-libs and the various unfinished c++
> bindings, although I normally don't like to start system-tools from c++.
> Or is there any c-api for it? I haven't found one.
>

There is a in development version of libudev contained since udev-127. But its 
API is not yet stable I think.

Regards
Matthias