zsh/Completion/User/_printers

#autoload

local expl ret=1 list disp

if (( $+commands[lsallq] )); then
  # Use AIX's command to list print queues
  _wanted printers expl printer compadd $(lsallq)
  return
fi

if (( ! $+_lp_cache )); then
  local file entry names i

  file=( /etc/(printcap|printers.conf) )

  _lp_cache=()
  _lp_alias_cache=()

  if (( $#file )); then
    while read entry; do
      if [[ "$entry" = [^[:blank:]\#\*_]*:* ]]; then
        names=( "${(s:|:)entry%%:*}" )
        if [[ "$entry" = *:description=* ]]; then
          disp="${${entry##*:description=}%%:*}"
        elif [[ $#names -gt 1 && "$names[-1]" = *\ * ]] ;then
          disp="$names[-1]"
        else
          disp=''
        fi
        if [[ -n "$disp" ]]; then
          _lp_cache=( "$_lp_cache[@]" "${names[1]}:${disp}" )
  	_lp_alias_cache=( "$_lp_alias_cache[@]" "${(@)^names[2,-1]:#*\ *}:${disp}" )
        else
          _lp_cache=( "$_lp_cache[@]" "${names[1]}" )
  	_lp_alias_cache=( "$_lp_alias_cache[@]" "${(@)names[2,-1]:#*\ *}" )
        fi
      fi
    done < $file[1]
  fi
  (( $#_lp_cache )) || _lp_cache=( 'lp0:Guessed default printer' )
  (( $#_lp_alias_cache )) || unset _lp_alias_cache
fi

if zstyle -T ":completion:${curcontext}:printers" verbose; then
  zformat -a list ' -- ' "$_lp_cache[@]"
  disp=(-ld list)
else
  disp=()
fi
_wanted printers expl printer \
    compadd "$disp[@]" - "${(@)_lp_cache%%:*}" && return 0

(( $+_lp_alias_cache )) || return 1

if zstyle -T ":completion:${curcontext}:printers" verbose; then
  zformat -a list ' -- ' "$_lp_alias_cache[@]"
  disp=(-ld list)
else
  disp=()
fi
_wanted printers expl printer \
    compadd "$disp[@]" - "${(@)_lp_alias_cache%%:*}" && return 0

return 1