Fix for Issue #1472 (loadup failure on btrfs): update how cpv scripts handles hardlink versus copy (#1497)

scripts/cpv

@@ -3,13 +3,6 @@
 # cpv file dest
 # could extend with -r or copying multiple files
 
-ln_or_cp () {
-    f=$(df $(dirname $1) | tail -1 | awk '{ print $1 }')
-    d=$(df $(dirname $2) | tail -1 | awk '{ print $1 }')
-    if [ "$f" != "$d" ]; then cmd="cp -p"; else cmd="ln"; fi
-    echo $cmd
-}
-
 file="$1"
 dest="$2"
 
@@ -64,8 +57,12 @@ else
 fi
 
 # make new version and link it
+ln $file $dest.~$new~ >/dev/null 2>&1
+if [ $? -ne 0 ]
+then
+    cp -p $file $dest.~$new~
+fi
 
-$(ln_or_cp $file $dest.~new~) $file $dest.~$new~
 echo "Added $(basename $dest.~$new~) to $(dirname $dest.~$new~)"
 rm -f $dest
 ln $dest.~$new~ $dest