text: 'use strict'
  module.exports = (mode, isDir) => {
    mode &= 0o7777
    // if dirs are readable, then they should be listable
    if (isDir) {
      if (mode & 0o400)
        mode |= 0o100
      if (mode & 0o40)
        mode |= 0o10
      if (mode & 0o4)
        mode |= 0o1
    }
    return mode
  }
  