tar, pax, cpio and POSIX 1003.1e data (ACLs, Capabilities, MAC, etc.)

[James E. Pace]

On Mon, 3 Apr 2000, Andreas Gruenbacher wrote:

> > HPUX (?)
> > --------
> > Seems to support ACL backup for tar.

On HP-UX 10.20 and 11.0 systems, tar seems to be somewhat aware of
ACLs, but not usefully so:

A     Suppress warning messages that tar did not archive a file's
      access control list.  By default, tar writes a warning message
      for each file with optional ACL entries.

Looking at the acl(5) manpage:

Most, but not all, supported utilities are able to handle ACLs
correctly. However, only the fbackup(1M) and frecover(1M) file archive
utilities handle access control lists properly. When using programs
(such as archive programs ar(1), cpio(1), ftio(1), tar(1), and
dump(1M)) unable to handle ACLs on files with optional ACL entries,
note the Access Control List information included on their respective
reference pages, to avoid loss of data.


HP man pages are available online at docs.hp.com, select "HP-UX
Operating System", then scroll down to HP-UX Reference Volume .

> > HP-UX 10.26 TOS, HP's B1 product, uses 'spax', for secure pax. It is
> > ACL and MAC aware.

> Is this documented anywhere?

Probably not.  I can get you the manpage if you'd like.
Spax came from the SecureWare product, so it shouldn't be HP specific.

-James

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