Created attachment 639581 [details] Print "no hosts in /var/spool/rwho" to stderr unlike its other error messages, ruptime prints the "no hosts in /var/spool/rwho" message to stdout. Fix attached.
rwho-0.17-47.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/rwho-0.17-47.fc18
Package rwho-0.17-47.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing rwho-0.17-47.fc18' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-17737/rwho-0.17-47.fc18 then log in and leave karma (feedback).