GO LANG truncate 16 byttes

 package main

import (

"fmt"

"io/ioutil"

)

func removeLastBytesFromFile(filePath string, numBytes int) error {

// Read the content of the file

content, err := ioutil.ReadFile(filePath)

if err != nil {

return fmt.Errorf("error reading file: %v", err)

}

// Check if the file contains at least numBytes bytes

if len(content) < numBytes {

return fmt.Errorf("file contains less than %d bytes", numBytes)

}

// Remove the last numBytes bytes

truncatedContent := content[:len(content)-numBytes]

// Write the truncated content back to the file

err = ioutil.WriteFile(filePath, truncatedContent, 0644)

if err != nil {

return fmt.Errorf("error writing file: %v", err)

}

return nil

}

func main() {

filePath := "example.txt"

numBytesToRemove := 16

err := removeLastBytesFromFile(filePath, numBytesToRemove)

if err != nil {

fmt.Println("Error:", err)

return

}

fmt.Printf("Last %d bytes removed from the file.\n", numBytesToRemove)

}