/etc/ha.d/rc.d/hb_takeover is in heartbeat 1:3.0.6-7.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #!/bin/sh
# License:      GNU General Public License (GPL)
HA_DIR=/etc/ha.d
. ${HA_DIR}/shellfuncs
ORIGNODE=$HA_src
if
    [ "X$ORIGNODE" = "X$HA_CURHOST" ]
then
      exit 0; # request is from us!
fi
case $HA_rsc_hold in
	all)
		standby_rsc=$HA_rsc_hold;;
	local)
		standby_rsc=foreign;;
	foreign)
		standby_rsc=local;;
esac
/usr/share/heartbeat/hb_standby $standby_rsc
 |