snappy_boot=
if test "${snap_mode}" = "try"; then
   setenv snap_mode "trying"; saveenv;
   if test -n ${snap_try_core}; then
     setenv snap_core "${snap_try_core}";
   fi;
   if test -n ${snap_try_kernel}; then
     setenv snap_kernel "${snap_try_kernel}";
   fi;
elif test "${snap_mode}" = "trying"; then
     setenv snap_mode ""; saveenv;
fi;