busybox: for all lib dirs create mounts only if directories exist

templates/lxc-busybox.in

@@ -238,24 +238,17 @@ lxc.rootfs = $rootfs
 #lxc.aa_profile = unconfined
 EOF
 
-if [ -d "$rootfs/lib" ]; then
-cat <<EOF >> $path/config
-lxc.mount.entry=/lib $rootfs/lib none ro,bind 0 0
-lxc.mount.entry=/usr/lib $rootfs/usr/lib none ro,bind 0 0
-EOF
-fi
-
-if [ -d "/lib64" ] && [ -d "$rootfs/lib64" ]; then
-cat <<EOF >> $path/config
-lxc.mount.entry=/lib64 $rootfs/lib64 none ro,bind 0 0
-EOF
-fi
-
-if [ -d "/usr/lib64" ] && [ -d "$rootfs/usr/lib64" ]; then
-cat <<EOF >> $path/config
-lxc.mount.entry=/usr/lib64 $rootfs/usr/lib64 none ro,bind 0 0
-EOF
-fi
+    libdirs="\
+        /lib \
+        /usr/lib \
+        /lib64 \
+        /usr/lib64"
+
+    for dir in $libdirs; do
+        if [ -d $dir ] && [ -d "$rootfs$dir" ]; then
+            echo "lxc.mount.entry=$dir $rootfs$dir none ro,bind 0 0" >> $path/config
+        fi
+    done
 }
 
 usage()