supermin: Improve error message and add -d option to ls command.

diff --git a/febootstrap-supermin-helper.sh b/febootstrap-supermin-helper.sh
index d11d82a..0849b1f 100755 (executable)
--- a/febootstrap-supermin-helper.sh
+++ b/febootstrap-supermin-helper.sh
@@ -81,10 +81,10 @@ rm -f "$kernel" "$initrd"
 # without arch second.
 
 arch=$(echo "@host_cpu@" | sed 's/^i.86$/i?86/')
-kernels=$(ls -1vr /boot/vmlinuz-*.$arch* 2>/dev/null | grep -v xen; ls -1vr /boot/vmlinuz-* 2>/dev/null | grep -v xen)
+kernels=$(ls -1dvr /boot/vmlinuz-*.$arch* 2>/dev/null | grep -v xen; ls -1dvr /boot/vmlinuz-* 2>/dev/null | grep -v xen)
 
 if [ -z "$kernels" ]; then
-    echo "$0: failed to find a suitable kernel" >&2
+    echo "$0: failed to find a suitable kernel in /boot directory" >&2
     exit 1
 fi