Re: [PATCH 1/2] selftests/lkdtm: Don't clear dmesg when running tests

[Naresh Kamboju]

On Thu, 25 Jun 2020 at 11:46, Kees Cook <keescook@xxxxxxxxxxxx> wrote:
>
> On Mon, Jun 22, 2020 at 02:21:38PM +0530, Naresh Kamboju wrote:
> > On Fri, 8 May 2020 at 12:23, Michael Ellerman <mpe@xxxxxxxxxxxxxx> wrote:
> > >  # Record and dump the results
> > > -dmesg -c >"$LOG"
> > > +dmesg | diff --changed-group-format='%>' --unchanged-group-format='' "$DMESG" - > "$LOG" || true
> >
> > We are facing problems with the diff `=%>` part of the option.
> > This report is from the OpenEmbedded environment.
> > We have the same problem from livepatch_testcases.
>
> Does "comm" exists in those environments?
>
> dmesg | comm -13 "$DMESG" - > "$LOG" || true

"comm" works in our environment.

- Naresh