Re: [kvm-unit-tests PATCH v1 4/4] s390x: add selftest for migration

[Nico Boehr <nrb@linux.ibm.com>]

On Mon, 2022-04-11 at 14:49 +0200, Claudio Imbrenda wrote:
[...]
> > diff --git a/s390x/selftest-migration.c b/s390x/selftest-
> > migration.c
[...]
> > +int main(void)
> > +{
> > +       /* don't say migrate here otherwise we will migrate right
> > away */
> > +       report_prefix_push("selftest migration");
> > +
> > +       /* ask migrate_cmd to migrate (it listens for 'migrate') */
> > +       puts("Please migrate me\n");
> > +
> > +       /* wait for migration to finish, we will read a newline */
> > +       (void)getchar();
> 
> how hard would it be to actually check that you got the newline?

It would be simple. I decided for ignoring what we actually read
because that's what ARM and PPC do.

But I am also OK checking we really read a newline. What would you
suggest to do if we read something that's not a newline? Read again
until we actually do get a newline?