[SSSD] [PATCH] Use systemd-login session information to check if user is logged in

Simo Sorce simo at redhat.com
Fri Sep 13 16:42:46 UTC 2013


On Fri, 2013-09-13 at 17:14 +0200, Jakub Hrozek wrote:
> On Thu, Sep 12, 2013 at 07:10:38PM +0200, Jakub Hrozek wrote:
> > On Wed, Sep 11, 2013 at 05:47:31PM -0400, Simo Sorce wrote:
> > > On Wed, 2013-09-11 at 19:19 +0200, Jakub Hrozek wrote:
> > > > On Wed, Sep 11, 2013 at 10:26:41AM -0400, Simo Sorce wrote:
> > > > > This patch was meant to remove the trolling of /proc for uids but I
> > > > > haven't got there yet.
> > > > > I meant to use utmp as a fallback but I realized utmp does not deal with
> > > > > uid numbers rather usernames, and I need to think if it makes sense to
> > > > > go that way as it may be hairy when we use subdomains as now I need to
> > > > > know what kind of user name was used (fully qualified or not etcc.).
> > > > > 
> > > > > So for now I left the old code as a fallback in case systemd is not
> > > > > available or fails unexpectedly.
> > > > > 
> > > > > Ticket: #2084
> > > > > 
> > > > > Simo.
> > > > > +#ifdef HAVE_SYSTEMD_LOGIN
> > > > > +    ret = sd_uid_get_sessions(uid, 0, NULL);
> > > > > +    if (ret > 0) {
> > > > > +        *result = true;
> > > > > +    }
> > > > > +    if (ret == 0) {
> > > > > +        *result = false;
> > > > > +    }
> > > > > +    if (ret >= 0) {
> > > > > +        return EOK;
> > > > > +    }
> > > > > +    DEBUG(0, ("systemd-login gave error %d: %s\n",
> > > > > +              -ret, strerror(-ret)));
> > > > > +    /* fall back to the old method */
> > > > 
> > > > Please use SSSDBG here.
> > > 
> > > attached.
> > > 
> > > >  Otherwise the code looks OK. Can you also open a
> > > > ticket to to document this change in behaviour either in man page or at
> > > > the very least the release notes?
> > > 
> > > I already have a ticket for this change, so I added a release note in
> > > that appropriate field there.
> > > 
> > > Simo.
> > 
> > That's fine, thank you.
> > 
> > ACK
> 
> Actually, I think we also need to pull in systemd-devel. See the
> attached patch, can I squash it in?

ACK, I meant to check that detail and then forgot, thank you for
noticing.

Simo.

-- 
Simo Sorce * Red Hat, Inc * New York




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