X-Git-Url: http://git.grml.org/?p=live-boot-grml.git;a=blobdiff_plain;f=components%2F9990-misc-helpers.sh;h=39e609d3a2619ef15f15116d524afe6c984b2b22;hp=a97615bb6ddc5f128eeafa0be2d10e8e121dc1f5;hb=f5716f9a79564e44e38f5d4164a4dc1d77cb8c3a;hpb=6f465ddc145fb527215865ed042875d231d8dcfd

diff --git a/components/9990-misc-helpers.sh b/components/9990-misc-helpers.sh
index a97615b..39e609d 100755
--- a/components/9990-misc-helpers.sh
+++ b/components/9990-misc-helpers.sh
@@ -114,7 +114,7 @@ check_dev ()
 				ISO_DEVICE=$(dirname ${ISO_DEVICE})
 				[ -b "$ISO_DEVICE" ] && break
 				i=$(($i -1))
-		        done
+			done
 		fi
 
 		if [ "$ISO_DEVICE" = "/" ]
@@ -1080,18 +1080,18 @@ find_persistence_media ()
 			result=$(probe_for_file_name "${overlays}" ${dev})
 			if [ -n "${result}" ]
 			then
-			        local loopdevice
+				local loopdevice
 				loopdevice=${result##*=}
-			        if is_in_comma_sep_list luks ${PERSISTENCE_ENCRYPTION} && is_luks_partition ${loopdevice}
+				if is_in_comma_sep_list luks ${PERSISTENCE_ENCRYPTION} && is_luks_partition ${loopdevice}
 				then
-				        local luksfile
+					local luksfile
 					luksfile=""
 					if luksfile=$(open_luks_device "${loopdevice}")
 					then
-					        result=${result%%=*}
+						result=${result%%=*}
 						result="${result}=${luksfile}"
 					else
-					        losetup -d $loopdevice
+						losetup -d $loopdevice
 						result=""
 					fi
 				fi
@@ -1310,15 +1310,14 @@ do_union ()
 			;;
 
 		overlay)
-			# XXX: can multiple unionro be used? (overlay only handles two dirs, but perhaps they can be chained?)
-			# XXX: and can unionro be optional? i.e. can overlay skip lowerdir?
-			if echo ${unionro} | grep -q " "
-			then
-				panic "Multiple lower filesystems are currently not supported with overlay (unionro = ${unionro})."
-			elif [ -z "${unionro}"	]
+			# XXX: can unionro be optional? i.e. can overlay skip lowerdir?
+			if [ -z "${unionro}" ]
 			then
 				panic "overlay needs at least one lower filesystem (read-only branch)."
 			fi
+			# Multiple lower layers can now be given using the the colon (":") as a
+			# separator character between the directory names.
+			unionro="$(echo ${unionro} | sed -e 's| |:|g')"
 			# overlayfs requires:
 			# + a workdir to become mounted
 			# + workdir and upperdir to reside under the same mount