Fixes missing entries when os-prober is run in a chroot environment by falling back
to blkid if udev isn't available or if /run/udev isn't bind mounted. Modified from
https://build.opensuse.org/package/view_file/Base:System/os-prober/os-prober-05efi-blkid.patch?rev=103

Bug: https://bugs.gentoo.org/761475
     https://bugzilla.opensuse.org/1076779

--- a/os-probes/mounted/x86/05efi
+++ b/os-probes/mounted/x86/05efi
@@ -46,6 +46,14 @@ if type udevinfo > /dev/null 2>&1; then
 	fi
 
 	eval "$(udevinfo -q property -n "$partition" | grep -E '^ID_PART_ENTRY_(TYPE|SCHEME)=')"
+
+	# udev may not work in chroot as its db may not be there, bailout that by blkid (bsc#1076779)
+	if [ -z "$ID_PART_ENTRY_TYPE" -a -z "$ID_PART_ENTRY_SCHEME" ] &&
+		type blkid > /dev/null 2>&1; then
+		debug "fallback to blkid"
+		eval "$(blkid -p -o udev "$partition" | grep -E '^(ID_PART_ENTRY_(TYPE|SCHEME))=')"
+	fi
+
 	debug "$partition partition scheme is $ID_PART_ENTRY_SCHEME"
 	debug "$partition partition type is $ID_PART_ENTRY_TYPE"
 
