[BusyBox] adduser applet complains about / being read-only

[Friedrich Lobenstock]

Hi!

I'm woundering what that might be:

[root at AxisProduct /tmp]289# adduser -h / -g usergrp -G quagga -D -H user
adduser: /: File exists
adduser: /: Read-only file system
adduser: /: Read-only file system

As far as I can see everything went well.  And yes I know that / is
read-only, only /etc/ which is a link to /mnt/flash/etc is writeable.

So what's it about with those messages?

-- 
MfG / Regards
Friedrich Lobenstock