[systemd-devel] Use a specific device ?

[poma]

On 05.06.2015 14:14, Jean-Christian de Rivaz wrote:
> Le 05. 06. 15 13:18, Aleksander Morgado a écrit :
>> On Tue, May 26, 2015 at 12:19 AM, Jean-Christian de Rivaz <jc at eclis.ch> wrote:
>>> I have a system where the modem have multiple /dev/ttyACMx ports where x is
>>> not constant because of the dynamic nature of others serial devices.
>> It may be worth noting that a very similar issue with the one faced
>> here is the one with network interface names, where interface names
>> were created as kernel drivers probed the different interfaces, ending
>> up with "eth0", "eth1" and so on. Then, there would be network
>> interface configurations for each network interface based on the name,
>> but no one really ensured that the name was the same upon reboots. The
>> solution provided by systemd to ensure that the proper configuration
>> is applied always to the proper interface is to make the device names
>> "predictable", see:
>> http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/
>>
>> This solution avoids the need of any other udev rules to e.g. create
>> network interface names containing the device MAC address or what not.
>>
>> I'm wondering whether the same could be applied not only to network
>> interfaces, but also to ttyACMs, ttyUSBs and cdc-wdms, and end up
>> having predictable tty names like e.g. /dev/ttyACMp0s20u4i0. Sure,
>> those names are a nightmare to type, but they are predictable (e.g. in
>> this case by including the physical location of the connector of the
>> hardware).
>>
> 
> This would be a wonderful solution. The only problem is when will this 
> feature be available in a stable Linux kernel widely used by all majors 
> distributions? Until this dream happens (probably not before severals 
> years I guess), an other option must be implemented.
> 
> Jean-Christian


Face your broadband modem, live your dreams?

Kay, when this would happen - Predictable Broadband Modem Interface Names?