Re: file(1)

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On Saturday 29 March 2008 02:10, "Joshua Brindle" <jbrindle@xxxxxxxxxx> wrote:
> >> # file qmail.pp  base.pp  /tmp/loadkeys.pp
> >> qmail.pp:         SE Linux modular policy version 1, 2 sections, mod
> >> version 7, Not MLS, module name qmail\005
>
> Also I think SELinux policy package, this magic number is for packages,
> modules have their own magic number.

# file /etc/selinux/refpolicy-mls/policy/policy.22
/etc/selinux/refpolicy-mls/policy/policy.22: SE Linux policy v22 MLS 8 symbols 
7 ocons

Yes, I've got that.

> >> base.pp:          SE Linux modular policy version 1, 4 sections, mod
> >> version 7, Not MLS, base /tmp/loadkeys.pp: SE Linux modular policy
> >> version 1, 2 sections, mod version 6, MLS, module name loadkeys\005
> >>
> >> Please let me know what you think of this, in terms of text
> >> formatting, information displayed, and use of file(1) features.
> >
> > "policy version 1" ought to be "policy type 1", or more
> > simply, "base module" (1) or "non-base module" (2).

But non-base modules have a 1 in that field too!

> > Just for comparison with the existing support in file for
> > kernel policies, "file policy.21" displays:
> > policy.21: SE Linux policy v21 8 symbols 7 ocons
> >
> > Not sure though that the symbols and ocons info is helpful
> > there to users, and it should always be implicit from the version.

Probably not.  But that was a mistake I made long ago.  Hopefully this 
discussion will help avoid such things this time.

> > Note btw that this format is expected to be obsoleted by the
> > policyrep work.

Which format?  The module format or the policy binary format?

In either case we still need file(1) support.  When someone gives me a disk 
containing a Debian/Etch or Fedora Core 5 filesystem in 2012 which has most 
files in /lost+found and asks me to recover data then the presence of magic 
entries will really help.

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