[9fans] Plan9 permissions

[Lucio de Re lucio@proxima.alt.za]

> 
> if you are the owner and the permissions are
> something like 466, then you can just change them
> with chmod.  if you are in the group and the 
> permissions are something like 446 or 646, then
> you can just become none (echo -n none >/dev/user)
> and then you have permission again.
> 
And yet, David has a point.  I remember my first confrontation with the 
description of permissions, and it seemed equally silly.  But in 
practice the owner may prefer to be reminded not to alter the contents 
of a file that a log process is allowed to update.

Note, as David says, that the more obvious approach has no mechanism to 
stop the owner doing anything if anyone else can do it.  In such a 
situation, a 446 permission serves no useful purpose.

-- 
Lucio de Re (lucio@proxima.alt.za)
Disclaimer: I'm working at getting my opinions to agree with me.