btrfs-shrink will produce file w/ multiple of 4096 bytes

1 files changed, 5 insertions, 0 deletions

diff --git a/btrfs-shrink b/btrfs-shrink
index a9bbee7..12f0e8e 100755
--- a/btrfs-shrink
+++ b/btrfs-shrink
@@ -76,6 +76,11 @@ main()
         rmdir "$mountpoint"
         if [ "$truncate" ]
         then
+            r=$((truncate % 4096))
+            if [ $r -ne 0 ]
+            then
+                truncate=$((truncate + 4096 - r))
+            fi
             truncate -s "$truncate" "$1"
         fi
         return $result