Re: [PATCH] proc: add "personality" to process status file

Arjan van de Ven
2008-10-05T00:48:59Z

On Sat, 4 Oct 2008 17:42:33 -0700
Kees Cook <kees.cook@canonical.com> wrote:

> On Sat, Oct 04, 2008 at 04:42:39PM -0700, Arjan van de Ven wrote:
> > On Sat, 4 Oct 2008 15:02:20 -0700
> > Kees Cook <kees.cook@canonical.com> wrote:
> > > Nothing else seemed appropriate, but I could make a brand new proc
> > > file, if that's sensible. "status_private" ?
> >
> > how about a file called "personality" that has each set bit as an
> > ascii version ?
> > (one per line maybe)
>
> Well, it's a one-to-many due to how the personality types are defined,
> so doing a bitfield-to-ASCII-names conversion wouldn't really work
> out:
>
> PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS |
> WHOLE_SECONDS | SHORT_INODE,
> PER_OSR5 = 0x0003 | STICKY_TIMEOUTS |
> WHOLE_SECONDS, ...
> PER_BSD = 0x0006,
> PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
>
> But I can certainly just make it a stand-alone file with just the
> bitfield. Or, I can still do the conversion and ignore PER_OSR5 and
> PER_SUNOS.

well.. if "you" as kernel can't really make out what it is, how is poor
userspace supposed to do it ?

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Arjan van de Ven Intel Open Source Technology Centre
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