On 03/01/10 13:50, Miles Nordin wrote:
"dd" == David Dyer-Bennet<d...@dd-b.net>  writes:

     dd>  Okay, but the argument goes the other way just as well -- when
     dd>  I run "chmod 6400 foobar", I want the permissions set that
     dd>  specific way, and I don't want some magic background feature
     dd>  blocking me.

This will be true either way.  Even if chmod isn't ignored, it will
reach into the nest of ACL's and mangle them in some non-obvious way
with unpredictable consequences, and the mangling will be implemented
by a magical background feature.

actually, you can be surprised even if there are no acls in use -- if, unbeknownst to you, some user has been granted file_dac_read or file_dac_write privilege, they will be able to bypass the file modes for read and/or for write.

Likewise if that user has been delegated zfs "send" rights on the filesystem the file is in, they'll be able to read every bit of the file.

                                        - Bill

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