kdesudo() function for bash - updated 5-25-2019

function kdesudo () (
  ## kdesudo replacement
  ## Copyleft 08/28/2018 - Joseph Pollock - JPmicrosystems
  ## Last modified 05/25/2019
  ## Usage: kdesudo [-t "Dialog Title"] [-p "Dialog Prompt"] command and arguments

  ## Just like sudo, it only prompts if sudo permission has timed out
  ## Won't work if your command is -t or -p
  ## and the corresponding flag isn't specified - BUT SERIOUSLY?

  ## NOTE: use of () instead of {} puts function body in a subshell
  ##       so all variables are local

  ## NOTE: Can fail on race condition between sudo test and sudo run

  ## NOTE: Does *not* handle embedded blanks in the command
  ##       It does handle them in the arguments to the command

  ##source ~/bin/bash_trace  ## debug TRACE

  prompt=" "
  while (( $# )) ## Process optional function arguments
  do
    case "$1" in
      "-t")
        shift
        if [[ -n "$1" ]] ## Ignore empty string
        then
          kcmd=("${kcmd[@]}" "--title" "$1")
          ##echo "kcmd [${kcmd[@]}]"  ## debug
        fi
        shift
      ;;
      "-p")
        shift
        [[ -n "$1" ]] && prompt="$1" ## Ignore empty string
        shift
      ;;
      *) ## Stop looking for kdesudo args as soon as any other argument is present
        break
      ;;
    esac
  done

  if (( ! $# )) ## There has to be some command to run
  then
    return 2
  fi

  args=("$@")
  ##echo "args [${args[@]}]"  ## debug
  sudo -n true &> /dev/null  ## Returns 0 if sudo runs without password
  ##false  ## debug Returns 1 for testing when sudo hasn't timed out
  if (( ! $? ))         ## if sudo is already activated - not timed out
  then
    sudo -- "${args[@]}"  ## then just run the command
  else                  ## Otherwise display password dialog
    kdialog --password "$prompt" "${kcmd[@]}" | sudo -S -- "${args[@]}"
  fi

  rc=$?
  [[ $rc == 141 ]] && rc=0 ## ignore a broken pipe
  return $rc
)