Determining MAC address or Serial Number
Hi, I'm trying to find a way to be able to uniquely identify each device in a PC and was hoping to use either serial or MAC for this purpose. I've looked at the documentation but can't find a generic way to read back serial numbers or MAC addresses from V4L devices? Does such a function exist? Thanks, Lou -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Determining MAC address or Serial Number
Lou Otway wrote, On 10/30/2009 10:40 AM:
Hi,
I'm trying to find a way to be able to uniquely identify each device in
a PC and was hoping to use either serial or MAC for this purpose.
I've looked at the documentation but can't find a generic way to read
back serial numbers or MAC addresses from V4L devices? Does such a
function exist?
Hi Lou,
I'm using the mac address to identify each device and to do so I created
this script which use dvbnet to create network interface from the dvb card.
a=your adapter
n=your net device
for ex. /dev/dvb/adapter1/net0 = a=1, n=0
# get mac address
iface=$(sudo /usr/bin/dvbnet -a $a -n $n -p 0 | awk '/device/ {print $3}')
sleep 1
mac_address=$(/sbin/ifconfig $iface | awk '/HWaddr/ {print $5}' | tr -d
':' | tr A-Z a-z)
num=$(sudo /usr/bin/dvbnet -a $a -n $n -l | grep 'Found device ' | awk
'{print $3}' | tr -d ':')
sleep 1
sudo /usr/bin/dvbnet -a $a -n $n -d $num 1 /dev/null
AFAIK, mac address are known only from the kernel and are not directly
exposed to the userland. I you manage to do something cleaner, let me
know :)
Regards
pierre gr.
Thanks,
Lou
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Re: Determining MAC address or Serial Number
pierre.gronlier wrote:
Lou Otway wrote, On 10/30/2009 10:40 AM:
Hi,
I'm trying to find a way to be able to uniquely identify each device in
a PC and was hoping to use either serial or MAC for this purpose.
I've looked at the documentation but can't find a generic way to read
back serial numbers or MAC addresses from V4L devices? Does such a
function exist?
Hi Lou,
I'm using the mac address to identify each device and to do so I created
this script which use dvbnet to create network interface from the dvb card.
a=your adapter
n=your net device
for ex. /dev/dvb/adapter1/net0 = a=1, n=0
# get mac address
iface=$(sudo /usr/bin/dvbnet -a $a -n $n -p 0 | awk '/device/ {print $3}')
sleep 1
mac_address=$(/sbin/ifconfig $iface | awk '/HWaddr/ {print $5}' | tr -d
':' | tr A-Z a-z)
num=$(sudo /usr/bin/dvbnet -a $a -n $n -l | grep 'Found device ' | awk
'{print $3}' | tr -d ':')
sleep 1
sudo /usr/bin/dvbnet -a $a -n $n -d $num 1 /dev/null
AFAIK, mac address are known only from the kernel and are not directly
exposed to the userland. I you manage to do something cleaner, let me
know :)
Regards
pierre gr.
re majordomo info at http://vger.kernel.org/majordomo-info.html
Thanks Pierre,
Unfortunately only some of my devices reported a MAC address, I guess
that not all drivers have this feature built in. I think the same
problem will hold true for serial devices so I will look at another way
to list my devices.
I was thinking to use lshw or lspci to give me a list of devices, from
that I can build my own table of devices each one with a unique value to
differentiate it from others. My worry is that the output from lshw or
lspci isn't sufficiently detailed to allow me to differentiate between
devices.
Thanks,
Lou
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