Tries to find the first internal Recovery HD and set the computer to boot from it on the next boot

set_boot_recovery_hd.sh

#!/bin/bash
#
# set_boot_recovery_hd.sh
#
# tries to find the first internal Recovery HD and set the computer to boot from it on the next boot
#
#

# actions

listRecoveryHDs=$(diskutil list | grep 'Apple_Boot Recovery HD' | awk '{print $NF}')

if [ "$listRecoveryHDs" == "" ]
then
	echo "ERROR: No Recovery HD partitions available."
	exit 1
fi

IFS=$'\n'

for recoPart in $listRecoveryHDs
do
	if diskutil info "$recoPart" | grep -woq 'Internal'
	then
		/usr/sbin/bless --device /dev/$recoPart --setBoot --nextonly && \
		echo "Set computer to boot from internal Recovery HD /dev/$recoPart"
		exit 0
	fi
done

echo "ERROR: No INTERNAL Recovery HD partitions available."

exit 1