Description of problem:
I created a user by the name test, and after doing with my testing was going to delete the user using the following command, userdel and also added '-f' for cleaning out the home without leaving any traces of 'test'. But the command says :

[root@xbox ~]# userdel -f test
userdel: user test is currently logged in

Then i noticed that a tab in terminal was open with the user logged in. Closed the TAB and again tried to remove the user. And to irony the user was already gone as now the command said :.

[root@xbox ~]# userdel -f test
userdel: user 'test' does not exist

Tried listing the files and all were there intact.

[root@xbox ~]# ll /home/test/
.bash_history          .bash_profile          .dbus/                 firefox-3.6.4.tar.bz2  .gconfd/               .gnome2_private/       .pulse-cookie
.bash_logout           .bashrc                firefox/               .gconf/                .gnome2/               .mozilla/
[root@xbox ~]#

I'm totally lost that how is parameter working fully against what man says about it, pert manual


-f, --force
           This option forces the removal of the user account, even if the user is still logged in. It also forces userdel to remove the user´s home directory and mail spool, even if another user uses the same home directory or if the mail spool is not owned by the specified user. If USERGROUPS_ENAB is defined to yes in /etc/login.defs and if a group exists with the same name as the deleted user, then this group will be removed, even if it is still the primary group of another user.

There seems to be some issue with the execution of -f parameter.
So all that i see here is a little change in the code to not delete the user from passwd and shadow if the user is logged in and the userdel is passed with '-f' as a paramerter, but instead alert out a proper message that the user and his home directory can't be deleted as the user is logged in. 

Version-Release number of selected component (if applicable):


How reproducible:
Easily and everytime

Steps to Reproduce:
1. Create a new user.
2. Open a session of that user in a terminal tab.
3. Try removing the same using the userdel command with '-f' parameter, keeping the session opened.
'userdel -f <username>'
4. Command execution says about the user logged in
'userdel: user <username> is currently logged in'
5. Close the session, again try the same 'userdel -f <username>'
Command says the user does not exist.

Actual results:
The user is deleted in step 4. 

Expected results:
step 4
In the backend it should not delete the user and neither his home directories.
and should alert  :
'userdel: user <username> is currently logged in, hence not deleting the user'