Red Hat Bugzilla – Bug 42572
rusers shows users that are not logged in
Last modified: 2015-03-04 20:09:08 EST
From Bugzilla Helper: 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'. How reproducible: Always 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 shelly.csl.mtu.edu ztan [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 [shelly.csl.mtu.edu] Login Name Tty Idle Login Time Office Office Phone jmbastia Jeffrey M. Bastian pts/0 May 28 10:15 (astra.cs.mtu.edu) 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 Additional info: 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. Thanks, 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 correctly). 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