Otto Moerbeek wrote on Wed, Jun 15, 2011 at 05:41:08PM +0200: > Posix does not say anything about the interaction of -i and -f.
I seem to dimly remember that POSIX says something about the precedence of conflicting options in general (in general as in: when there is no specific ruling for a specific utility). I *think* this had something to do with order, but lack the time to search for that part of the text right now.