weird permitions

[Stefan Lambrev]

Hello,

Can someone explain to me why next can happened on freebsd:
1. add 2 users in same group - user test and test-ro in group test
2. as user test: cd /home/test ; mkdir test; chmod 775 test; echo 
"asdasd" > ~/test/del.me
3. su - test-ro ; cd /home/test; vim del.me - make changes; force save (:x!)

ls -l
total 2
-rw-r--r--  1 test-ro  test  10 Nov 29 18:19 del.me (how is that possible ?)

back "su - test" and try to edit this file - impossible!

I do not know what the RFC says about it, but it is ultra weird for me
that such ownership takeover is possible.

6.2-PRERELEASE FreeBSD Fri Oct 27 19:53:30 amd64

-- 
Best Wishes,
Stefan Lambrev
ICQ# 24134177