On Fri, Sep 04, 2020 at 04:14:49PM +0000, Tony May via Linuxptp-users wrote:
> Is there a better way to find the PTP device path for a network
> interface based on its name? In particular, is there a library that
> I can include in some C/C++ code that I can call to resolve the
> device path from the interface name?
I don't know of any library for that. The methods you described are
in fact the ways to find out the association between a network
interface and a PHC character device. So any such library would have
to do what you described anyhow.
Personally, I use a shell script for that. For example:
ETHA=eth6
DEVINDEX=$(ethtool -T $ETHA | awk '/PTP/ {print $4}')
DEVA=/dev/ptp$DEVINDEX
Thanks,
Richard
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