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Created attachment 567010 [details]
strace -f output

Description of problem:

   The rwho daemon doesnt start on rhel7:

# strace -f -ostrace.rwhod.txt service rwhod start
Redirecting to /bin/systemctl  start rwhod.service
Job failed. See system logs and 'systemctl status' for details.

   Strace attached.

   This issue is a regression compared to rhel6. Even with systemd, all
   services should be backward compatible with the old service command
   syntax.


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

   rwho-0.17-36.el7.x86_64

How reproducible:

   always

Steps to Reproduce:

   service rwhod start

Removing "PIDFile=/var/run/rwhod.pid" from rwhod.service fixes this issue. Fixed builds are already in Fedora and also in RHEL-7.

This is a commit in RHEL-7:
http://post-office.corp.redhat.com/archives/cvs-commits-list/2012-March/msg01436.html