aptly/utils/utils.go

// Package utils collects various services: simple operations, compression, etc.
package utils

import (
  "fmt"
  "os"
  "golang.org/x/sys/unix"
)

// check if directory exists and is accessible
func DirIsAccessible(filename string) error {
  _, err := os.Stat(filename);
  if err != nil {
    if ! os.IsNotExist(err) {
      return fmt.Errorf("Something went wrong, %v", err)
    }
  } else {
    if unix.Access(filename, unix.W_OK) != nil {
      return fmt.Errorf("'%s' is inaccessible, check access rights", filename)
    }
  }
  return nil
}