Format permissions

function formatPermissions(permissionString) {
  if (permissionString !~ /^[r-][w-][x-]$/)
    return "Error: wrong persmission specified"

  result = ""

  if (substr(permissionString, 1, 1) == "r")
    result = result "readable "
  if (substr(permissionString, 2, 1) == "w")
    result = result "writable "
  if (substr(permissionString, 3, 1) == "x")
    result = result "executable"

  gsub(/\s$/, "", result)
  gsub(/\s/, " and ", result)
  return result
}

function formatAllPermissions(permissionString) {
  if (permissionString !~ /^([r-][w-][x-]){3}$/)
    return "Error: wrong persmission specified"

  ownerPermissions = formatPermissions(substr(permissionString, 1, 3))
  groupPermissions = formatPermissions(substr(permissionString, 4, 3))
  otherPermissions = formatPermissions(substr(permissionString, 7, 3))

  result = "Owner: " ownerPermissions " | Group: " groupPermissions " | Other: " otherPermissions
  return result
}

NR > 1 {
  permissions = substr($1, 2)
  print formatAllPermissions(permissions), "=>", $9
}