meinberg dcf77 compatible clock

[folkert]

Please ignore, I may have confused some things.

On Sun, Jan 16, 2022 at 07:36:07PM +0100, folkert wrote:
> Hi,
> 
> Today I connected a meinberg dcf77 compatible receiver.
> ntpsec refused to use it in its default (ubunt-)configuration:
> 
>     ntpd[4607]: REFCLOCK: PARSE receiver #0: parse_start: open of /dev/refclock-0 failed: Permission denied
> 
> even if chmod'ed it rwrwrw it didn't work.
> Only after I removed O_NOCTTY in ntpd/refclock_generic.c it would start.
> The receiver is connected via USB (I'm aware that that is bad for
> timekeeping) as /dev/ttyUSB0 and I made a symlink to refclock-0 for
> that.