mkdir has stopped working - SCO Xenix

[Doug Gwyn]

In article <1991Apr10.090338.4967 at nodecg.ncc.telecomwa.oz.au> baker at nodecg.ncc.telecomwa.oz.au (mark baker 4206813) writes:
>One of my 386 machines running Xenix 2.3.2 has suddenly refused to let
>any user, including root, from making a directory.

On many UNIX implementations, presumably including yours,
"mkdir" must be installed set-UID 0 in order to work.
I would guess that somebody changed the owners of the system utilities,
or their protection modes, or something like that.