Change the interface of SetModTime to return an error - #348

fs/fs.go

@@ -31,6 +31,7 @@ var (
 	ErrorCantMove             = fmt.Errorf("Can't move object - incompatible remotes")
 	ErrorCantDirMove          = fmt.Errorf("Can't move directory - incompatible remotes")
 	ErrorDirExists            = fmt.Errorf("Can't copy directory - destination already exists")
+	ErrorCantSetModTime       = fmt.Errorf("Can't set modified time")
 )
 
 // RegInfo provides information about a filesystem
@@ -142,7 +143,7 @@ type Object interface {
 	String() string
 
 	// SetModTime sets the metadata on the object to set the modification date
-	SetModTime(time.Time)
+	SetModTime(time.Time) error
 
 	// Open opens the file for read.  Call Close() on the returned io.ReadCloser
 	Open() (io.ReadCloser, error)

fs/operations.go

@@ -145,7 +145,11 @@ func Equal(src, dst Object) bool {
 	if !Config.CheckSum {
 		// Size and hash the same but mtime different so update the
 		// mtime of the dst object here
-		dst.SetModTime(srcModTime)
+		err := dst.SetModTime(srcModTime)
+		if err != nil {
+			Stats.Error()
+			ErrorLog(dst, "Failed to read set modification time: %s", err)
+		}
 	}
 
 	if hash == HashNone {