+ide_ofpath()
+{
+ if [ ! -L "/proc/ide/$DEVNODE" ] ; then
+ echo 1>&2 "$PRG: /dev/$DEVNODE: Device not configured"
+ return 1
+ fi
+
+ local IDEBUS="$(v=`readlink /proc/ide/$DEVNODE` ; echo ${v%%/*} )"
+ if [ -z "$IDEBUS" ] ; then
+ echo 1>&2 "$PRG: BUG: IDEBUS == NULL"
+ return 1
+ fi
+
+ case "$(uname -r)" in
+ 2.5.*|2.6.0*|2.6.1|2.6.1-*|2.6.2|2.6.2-*)
+ echo 1>&2 "$PRG: Linux kernel `uname -r` is not supported"
+ return 1
+ ;;
+ 2.6.*|2.7.*)
+ if ! (grep -q '.* .* sysfs ' /proc/mounts 2> /dev/null) ; then
+ echo 1>&2 "$PRG: sysfs must be mounted for ofpath to support this system"
+ return 1
+ fi
+ local SYS="$(m=`grep '.* .* sysfs ' /proc/mounts | head -n 1` ; echo `d=${m#* };echo ${d%% *}`)"
+ if [ -z "$SYS" -o ! -d "$SYS" ] ; then
+ echo 1>&2 "$PRG: Unable to determine sysfs mountpoint"
+ return 1
+ fi
+ local OF1275IDE="${SYS}/block/${DEVNODE}/device/../../devspec"
+ ;;
+ *)
+ local OF1275IDE="/proc/ide/$IDEBUS/devspec"
+ ;;
+ esac
+
+ if [ ! -f "$OF1275IDE" ] ; then
+ case "$(cat /proc/device-tree/model)" in
+ PowerMac3*|PowerMac4*|PowerMac5*|PowerMac6*|PowerMac7*|RackMac*)
+ local CDROM="$(grep "^drive name:" /proc/sys/dev/cdrom/info 2> /dev/null | grep $DEVNODE)"
+ if [ -z "$CDROM" ] ; then
+ echo 1>&2 "$PRG: WARNING: Your kernel is too old for proper support, device may be innaccurate."
+ echo "ultra2:$PARTITION"
+ else
+ echo "cd:$PARTITION"
+ fi
+ ;;
+ *)
+ local CDROM="$(grep "^drive name:" /proc/sys/dev/cdrom/info 2> /dev/null | grep $DEVNODE)"
+ if [ -z "$CDROM" ] ; then
+ if [ "$DEVNODE" = hda ] ; then
+ echo "hd:$PARTITION"
+ else
+ echo "ultra1:$PARTITION"
+ fi
+ else
+ echo "cd:$PARTITION"
+ fi
+ ;;
+ esac
+ else
+ local DEVSPEC="$(cat $OF1275IDE)"
+ [ "$DEBUG" = 1 ] && echo 1>&2 "$PRG: DEBUG: DEVSPEC=$DEVSPEC"
+ if [ -z "$DEVSPEC" ] ; then
+ echo 1>&2 "$PRG: KERNEL BUG: $OF1275IDE exists, but is empty"
+ return 1
+ fi
+
+ if [ ! -f "/proc/ide/${IDEBUS}/channel" ] ; then
+ echo 1>&2 "$PRG: KERNEL BUG: /proc/ide/${IDEBUS}/channel does not exist"
+ return 1
+ fi
+
+ case "$(cat /proc/device-tree${DEVSPEC}/device_type 2> /dev/null)" in
+ ide|ata)
+ local MASTER="/disk@0"
+ local SLAVE="/disk@1"
+ ;;
+ pci-ide|pci-ata)
+ local MASTER="/@$(cat /proc/ide/${IDEBUS}/channel)/disk@0"
+ local SLAVE="/@$(cat /proc/ide/${IDEBUS}/channel)/disk@1"
+ ;;
+ scsi) ## some lame controllers pretend they are scsi, hopefully all kludges are created equal.
+ local MASTER="/@$(($(cat /proc/ide/${IDEBUS}/channel) * 2 + 0))"
+ local SLAVE="/@$(($(cat /proc/ide/${IDEBUS}/channel) * 2 + 1))"
+ ;;
+ spi)
+ local MASTER="/disk@$(cat /proc/ide/${IDEBUS}/channel),0"
+ local SLAVE="/disk@$(cat /proc/ide/${IDEBUS}/channel),1"
+ ;;
+ *)
+ echo 1>&2 "$PRG: Unsupported IDE device type: \"$(cat /proc/device-tree${DEVSPEC}/device_type 2> /dev/null)\""
+ return 1
+ ;;
+ esac
+
+ case "$DEVNODE" in
+ hda|hdc|hde|hdg|hdi|hdk|hdm|hdo)
+ echo "${DEVSPEC}${MASTER}:$PARTITION"
+ return 0
+ ;;
+ hdb|hdd|hdf|hdh|hdj|hdl|hdn|hdp)
+ echo "${DEVSPEC}${SLAVE}:$PARTITION"
+ return 0
+ ;;
+ *)
+ echo 1>&2 "$PRG: /dev/$DEVNODE is not supported"
+ return 1
+ ;;
+ esac
+ fi
+}
+