dmsquash: add nasty hack for cdroms

Some CDROMs do not generate a label symlink and have to be read from.

modules.d/90dmsquash-live/cdrom-hack.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+[ -e /dev/sr0 ] && {
+	blkid /dev/sr0;
+	blkid /dev/sr0;
+} 2>/dev/null

modules.d/90dmsquash-live/install

@@ -20,3 +20,4 @@ inst_hook pre-udev 30 "$moddir/dmsquash-live-genrules.sh"
 inst "$moddir/dmsquash-live-root" "/sbin/dmsquash-live-root"
 # should probably just be generally included
 inst_rules 60-cdrom_id.rules
+inst "$moddir/cdrom-hack.sh" /sbin/cdrom-hack.sh

modules.d/90dmsquash-live/parse-dmsquash-live.sh

@@ -30,11 +30,12 @@ case "$liveroot" in
 	root="${root#live:}"
 	root="live:/dev/disk/by-uuid/${root#UUID=}"
         rootok=1 ;;
-    /dev/*)
-	root="live:${root}"
+    live:/dev/*)
         rootok=1 ;;
 esac
 info "root was $root, liveroot is now $liveroot"
 
+[ $rootok = "1" ] && initqueue --settled /sbin/cdrom-hack.sh
+
 # make sure that init doesn't complain
 [ -z "$root" ] && root="live"