buikd: Fix the detection of udev with udevadm version < 128

Signed-off-by: Marc-A. Dahlhaus <mad@wol.de>

install.sh

@@ -30,7 +30,8 @@ echo "Installing Xen from '$src' to '$dst'..."
 [ -x "$(which udevinfo)" ] && \
   UDEV_VERSION=$(udevinfo -V | sed -e 's/^[^0-9]* \([0-9]\{1,\}\)[^0-9]\{0,\}/\1/')
 
-[ -z "$UDEV_VERSION" -a -x /sbin/udevadm ] && UDEV_VERSION=$(/sbin/udevadm -V)
+[ -z "$UDEV_VERSION" -a -x /sbin/udevadm ] && \
+  UDEV_VERSION=$(/sbin/udevadm info -V | awk '{print $NF}')
 
 if [ -n "$UDEV_VERSION" ] && [ $UDEV_VERSION -ge 059 ]; then
   echo " - installing for udev-based system"

tools/check/check_udev

@@ -8,7 +8,8 @@ OpenBSD|NetBSD|FreeBSD)
 	has_or_fail vnconfig
 	;;
 Linux)
-	has /sbin/udevadm && udevver=`/sbin/udevadm -V`
+	has /sbin/udevadm && \
+		udevver=`/sbin/udevadm info -V | awk '{print $NF}'`
 	[ -z "$udevver" ] && has_or_fail udevinfo && \
 		udevver=`udevinfo -V | awk '{print $NF}'`
 	[ "$udevver" -ge 59 ] 2>/dev/null || \

tools/hotplug/Linux/Makefile

@@ -24,10 +24,12 @@ XEN_SCRIPT_DATA += vtpm-migration.sh vtpm-impl
 XEN_HOTPLUG_DIR = $(CONFIG_DIR)/hotplug
 XEN_HOTPLUG_SCRIPTS = xen-backend.agent
 
+UDEVVER = 0
 ifeq ($(shell [ -x /sbin/udevadm ] && echo 1),1)
-UDEVINFO = /sbin/udevadm
-else
-UDEVINFO = /usr/bin/udevinfo
+UDEVVER = $(shell /sbin/udevadm info -V | sed -e 's/^[^0-9]* \([0-9]\{1,\}\)[^0-9]\{0,\}/\1/' )
+endif
+ifeq ($(shell [ -x /usr/bin/udevinfo ] && echo 1),1)
+UDEVVER = $(shell /usr/bin/udevinfo -V | sed -e 's/^[^0-9]* \([0-9]\{1,\}\)[^0-9]\{0,\}/\1/' )
 endif
 
 UDEV_RULES_DIR = $(CONFIG_DIR)/udev
@@ -38,7 +40,7 @@ DE = $(if $(DESTDIR),$(shell readlink -f $(DESTDIR)),)
 ifeq ($(findstring $(DI),$(DE)),$(DI))
 HOTPLUGS=install-hotplug install-udev
 else
-ifeq ($(shell [ -x $(UDEVINFO) -a `$(UDEVINFO) -V | sed -e 's/^[^0-9]* \([0-9]\{1,\}\)[^0-9]\{0,\}/\1/'` -ge 059 ] && echo 1),1)
+ifeq ($(shell [ $(UDEVVER) -ge 059 ] && echo 1),1)
 HOTPLUGS=install-udev
 else
 HOTPLUGS=install-hotplug