Stop DBus errors from causing panics by checking error type (Arsen6331/itd#29)

blefs/all.go

@@ -23,7 +23,13 @@ func (blefs *FS) RemoveAll(path string) error {
 		return blefs.removeAllChildren(path)
 	} else {
 		err = blefs.Remove(path)
-		if err != nil && err.(FSError).Code != -2 {
+
+		var code int8
+		if err, ok := err.(FSError); ok {
+			code = err.Code
+		}
+
+		if err != nil && code != -2 {
 			return err
 		}
 	}
@@ -50,7 +56,13 @@ func (blefs *FS) removeAllChildren(path string) error {
 		} else {
 			err = blefs.Remove(entryPath)
 		}
-		if err != nil && err.(FSError).Code != -2 {
+
+		var code int8
+		if err, ok := err.(FSError); ok {
+			code = err.Code
+		}
+
+		if err != nil && code != -2 {
 			return err
 		}
 	}
@@ -68,7 +80,13 @@ func (blefs *FS) MkdirAll(path string) error {
 		curPath := strings.Join(splitPath[0:i+1], "/")
 
 		err := blefs.Mkdir(curPath)
-		if err != nil && err.(FSError).Code != -17 {
+
+		var code int8
+		if err, ok := err.(FSError); ok {
+			code = err.Code
+		}
+
+		if err != nil && code != -17 {
 			return err
 		}
 	}