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Filename : dmsetup_env
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#!/bin/sh
#
# Debian's dmsetup is lacking the export patch, so gather the minimum
# information here in order to get proper partition mappings via kpartx
# 
# See: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=434241
#      http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=487881
#      http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=493078

MAJOR=$1
MINOR=$2

if [ -z "$MAJOR" -o -z "$MINOR" ]; then
    echo "usage: $0 major minor"
    exit 1
fi

DMSETUP="/sbin/dmsetup -c --noheadings info -j$MAJOR  -m$MINOR"

DM_UUID=`$DMSETUP -oUUID`
if [ -n "$DM_UUID" ]; then 
    echo DM_UUID=$DM_UUID
    ATTRS=`$DMSETUP -oattr`
    case "$ATTRS" in
        L-*) # this is the only state needed for the kpartx udev rules
            echo DM_TABLE_STATE=LIVE
	    echo DM_STATE=ACTIVE
	    ;;
    esac
fi
echo DM_NAME=`$DMSETUP -oname`