On Sun, May 10, 2009, Loïc Minier wrote:
> Running ./test_utmp in the situation of the bug gives:
> ut_type: 7
> ut_user: foobar
> ut_id: 2
> ut_type: 6
> ut_user: LOGIN
> ut_id: 2
> userdel check
> user foobar is currently logged in
"w foobar" checks whether the PID still corresponds to an existing
process.
I've rebuilt procps' w and confirmed that I'm hitting the PID test.
best = getproc(u, tty + 5, &jcpu, &ut_pid_found);
/* just skip if stale utmp entry (i.e. login proc doesn't exist). If there
* is a desire a cmdline flag could be added to optionally show it with a
* prefix of (stale) in front of cmd or something like that.
*/
if (!ut_pid_found) {
return;
}
(getproc() is a bit long to copy here and I didn't read it fully)
--
Loïc Minier
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