On Tue, Aug 16, 2005 at 03:10:34PM +0200, Joost Bekkers wrote: > On Tue, Aug 16, 2005 at 04:51:15PM +0400, Dmitry Agaphonov wrote: > > Hello, > > > > > > I have user A from group G creating shared memory M with permissions > > 0060. After this, A fails to attach M due to permission denied. > > However, another user B from the same group G successfully attaches M. > > User A manages to attach only if permissions 0600 added for M. > > > > Why the system disregards group permissions for user A? Is it correct > > behaviour? > > > > This is happening on FreeBSD 4.11-STABLE. > > > > This is normal&correct behaviour. > > Access if granted on a best match basis: > > if user==owner then only user rights are applied > elseif user is member of group then only group rights are applied > else only 'other' rights are applied. >
This also applies for the filesystem. $ id uid=1001(dd) gid=1001(dd) groups=1001(dd) $ ls -l file ----r--r-- 1 dd dd 0 Aug 16 16:34 file $ cat file cat: file: Permission denied $
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