Adding persistent-read-only boot parameter.

It currently only makes snapshots read-only. Support for overlays will
be a bit more complicated to implement.

diff --git a/scripts/live b/scripts/live
index 688c0a7..970853c 100755 (executable)
--- a/scripts/live
+++ b/scripts/live
@@ -262,6 +262,10 @@ Arguments ()
                                PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
                                export PERSISTENT_PATH
                                ;;
+                       persistent-read-only)
+                               PERSISTENT_READONLY="Yes"
+                               export PERSISTENT_READONLY
+                               ;;
 
                        persistent-storage=*)
                                PERSISTENT_STORAGE="${ARGUMENT#persistent-storage=}"
@@ -1186,7 +1190,10 @@ try_snap ()
                return 1
        fi
 
-       echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt
+       if [ -z ${PERSISTENT_READONLY} ]
+       then
+               echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt
+       fi
        return 0
 }