Improved Scramble function efficency

main.go

@@ -61,22 +61,20 @@ func Shred(path string) error {
 }
 
 func Scramble(path string, size int64) error {
- var i int64
- for i = 0; i < 7; i++ { // 7 iterations
- file, err := os.OpenFile(path, os.O_RDWR, 0)
- if err != nil {
+ file, err := os.OpenFile(path, os.O_RDWR, 0)
+ if err != nil {
+ return err
+ }
+ defer file.Close()
+
+ for i := 0; i < 7; i++ { // 7 iterations
+ buff := make([]byte, size)
+ if _, err := rand.Read(buff); err != nil {
  return err
  }
- defer file.Close()
-
- offset, err := file.Seek(0, 0)
- if err != nil {
+ if _, err := file.WriteAt(buff, 0); err != nil {
  return err
  }
- buff := make([]byte, size)
- rand.Read(buff)
- file.WriteAt(buff, offset)
- file.Close()
  }
  return nil
 }