我怎样才能使这个bash脚本成为一个单行？

Question

I need a more compact, preferably an one-liner, for the following bash script:

#/bin/sh
service openstack-keystone status > /dev/null
service_rc=$?
keystone token-get 2>&1 | grep "^Authentication Failed" > /dev/null
keystone_rc=$?
if [ $service_rc != 0 -o $keystone_rc == 0 ]
then
        echo "need to restart"
else
        echo "ok"
fi

I eventually have to get this logic into a puppet service where the standard status check is not enough.

Updated. Sorry for not be more clear in my initial question and thanks to you that have commented and answered. :)

Answer 1

You can use:

service blah status > /dev/null &&
    keystone token-get 2>&1 | grep -q "^Authentication Failed" &&
    echo "ok" || echo "need to restart"