Re: [PATCH] POSIX ACL support

[Eli Zaretskii]

> Date: Wed, 21 Nov 2012 07:36:09 -0800
> From: Paul Eggert <address@hidden>
> Cc: address@hidden
> 
> On 11/21/2012 06:25 AM, Stefan Monnier wrote:
> > I'd start with whichever is easiest.
> 
> I suggest something that's even simpler at the C level:
> an API that simply clones attributes from one file to
> another.  The two files can be represented by file names
> and file descriptors.  There's no need to build a runtime
> representation in C or Lisp of the metadata.  Just copy
> the metadata directly, from one file to the other.

But that could be impossible in some cases, no?  Can a user on a Posix
host always copy the ACLs, no matter what access right these ACLs
specify?

And in addition, this could be inconvenient or even dangerous: you
could set access rights on a file you created that give you no access
at all, not even read access.  IOW, something like umask filtering
might be necessary to avoid shooting yourself in the foot.  Right?