Find harddisks programmatically in shell under FreeBSD while also identifying SMART capability

finddisks.sh

#!/bin/sh

DEVICES=`/sbin/camcontrol devlist | /usr/bin/egrep -oe '\(\w*\d*'| /usr/bin/sed -e 's;^(;;g'`

for DEVICE in $DEVICES; do
    NEED_SMART=`/sbin/camcontrol identify $DEVICE | /usr/bin/egrep -coe '^SMART.*yes.*no.*'`
    if [ $NEED_SMART -eq 1 ] && [ -f "/usr/local/sbin/smartctl" ]; then
        /usr/local/sbin/smartctl -s on /dev/$DEVICE
        [ $? -eq 0 ] && echo "Enabled SMART for $DEVICE" 1>&2 # output to STDERR so people see it while piping ;)
    fi
    # account for changes in enabling SMART
    HAVE_SMART=`/sbin/camcontrol identify $DEVICE | /usr/bin/egrep -coe '^SMART.*yes.*'`
    NEED_SMART=`/sbin/camcontrol identify $DEVICE | /usr/bin/egrep -coe '^SMART.*yes.*no.*'`
    case "$DEVICE" in
        acd*) ;;
        ses*) ;;
        *)
            echo -n $DEVICE
            if [ $HAVE_SMART -ne 1 ]; then
                echo # newline
            elif [ $HAVE_SMART -eq 1 ] && [ $NEED_SMART -eq 0 ]; then
                echo " (SMART)"
            else
                echo " (SMART disabled)"
            fi
            ;;
    esac
done