facter forkbomb

root@master:/etc/puppetlabs/facter/facts.d # cat foo.sh
#! /bin/sh
FACT=$(facter hostname)
echo "foo=${FACT}"

root@master:/etc/puppetlabs/facter/facts.d # chmod +x foo.sh
root@master:/etc/puppetlabs/facter/facts.d # facter ipaddress
<hangs and explodes>


## The workaround is to manually disable external facts so it doesn't exec itself
#! /bin/sh
FACT=$(facter hostname --no-external-facts)
echo "foo=${FACT}"