Red Hat Bugzilla – Bug 42572
rusers shows users that are not logged in
Last modified: 2015-03-04 20:09:08 EST
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User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.2-2 i686)
Description of problem:
When I run 'rusers' against a lab full of computers, it shows users that
are not actually logged in. They _were_ logged in at one point, but have
since logged out, and 'rusers' is showing stale data.
'rusers' isn't the only command affected - 'who', 'finger', and 'last' all
show the same stale data.
The only command that accurately shows who is logged in is 'w'.
Steps to Reproduce:
1. Just run the 'rusers', 'who', 'last | grep userid', or 'finger
@hostname' and the stale data is shown.
Actual Results: For example, here is a screenshot of shelly.csl.mtu.edu
demonstrating the problem:
[jmbastia@astra ~]$ rusers shelly
[jmbastia@astra ~]$ rlogin shelly
Last login: Sat May 26 10:48:40 from astra.cs.mtu.edu
You have mail.
[jmbastia@shelly ~]$ who
jmbastia pts/0 May 28 10:15
ztan pts/2 May 27 21:01
[jmbastia@shelly ~]$ finger @shelly
Login Name Tty Idle Login Time Office
jmbastia Jeffrey M. Bastian pts/0 May 28 10:15
ztan Zheng Tan *pts/2 147d May 27 21:01
[jmbastia@shelly ~]$ last | grep ztan | grep still
ztan pts/2 Sun May 27 21:01 still logged in
[jmbastia@shelly ~]$ w
10:15am up 20:00, 2 users, load average: 0.00, 0.00, 0.00
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
jmbastia pts/0 astra.cs.mtu.edu 10:15am 0.00s 0.08s 0.01s w
[jmbastia@shelly ~]$ ps aux | grep ztan
jmbastia 3799 0.0 0.4 1620 592 pts/0 S 10:15 0:00 grep ztan
Expected Results: ztan should not have been listed in any of the above
output. The only correct output was from the 'w' command
I'm not sure if this is relevant, but in the changelog for kernel 2.4.5,
this is given for the pre2 release:
- Alexander Viro: clean up process reaping procedures, make /proc use
the proper fields to notice that the process is gone, gone, gone.
Using the most recent updates from rawhide i can't reproduce this problem.
I'll close the bug with RAWHIDE for now. If you could update your system with
the rawhide kernel/glibc and the newest rFOO tools (rsh, rusers etc.) and check
if the problem is actually gone i'd really appreciate it.
Read ya, Phil
*** Bug 42890 has been marked as a duplicate of this bug. ***
This bug has resurfaced its ugly head in RedHat 7.3 (or maybe was never squashed
I notice that it only shows up for users who appear to have not logged out
correctly, which shows up in `last` as "gone - no logout".
[jmbastia@consult ~]$ last | more
jmbastia pts/1 astra Tue May 28 14:18 still logged in
root pts/1 astra Tue May 28 13:20 - 13:21 (00:00)
hsuenaga pts/3 Thu May 23 20:38 - 20:39 (00:01)
hsuenaga pts/2 Thu May 23 16:48 gone - no logout
'hsuenaga' shows up as still logged in through rusers/finger/who.
Note that the 'w' command does show who is logged in correctly.
Yeah, seen that with the other tools as well. This seems to have been a kde bug
at some point and might be if connections are simply dropped and the wtmp/utmp
files don't get updated correctly.
One of the tools did it right, so i'll check that if i can find the difference
in how they 'login' status of a user is determined.
Read ya, Phil
It seems as if the bug hasn't resurfaced, at least for me it works now
nicely again with RH 9, FC1 and RHEL3.
Closing the bug as works for me now.
Read ya, Phil