[F8] Python's libuser.get_user_shells() hangs. GDM Greeter, setroubleshootd, sealert was hanging.

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I have been working with John Dennis @ Redhat and we have
both found that python's libuser.get_user_shells() function
will hang if there is a line entry added to the end of the
/etc/shells file with no newline.

We had found that setroubleshootd, sealert, GDM greeter, and
perhaps other programs that uses this python function will
also hang.

The specific line-item that was found in that file was:
/SENDMAIL/ANY/SHELLS/

It is not known if this was added due to the installation of
sendmail, postfix, or ISPConfig.  The simple fix was to remove
this strange line-item or to ensure there is a newline at the
last entry of the /etc/shells file.

My previous postings regarding GDM Greeter, setroubleshooter
and sealert all running over 90% of CPU is now resolved due
to the use of the aforementioned python module/function.

I am not sure if Dennis will file a bug-report against the
libuser.get_user_shells() function.

Kind regards,
Dan

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