zsh/Completion/User/_rlogin

#compdef rlogin rsh remsh rcp

_rlogin () {
  case "${words[1]:t}" in
  rlogin)
    _arguments -s \
      '-8[allow 8-Bit data]' \
      '-e-[specify escape character]:escape character:' \
      '-l[specify login user name]:login as:_rlogin_users' \
      ':remote host name:_rlogin_hosts'
    ;;
  rsh|remsh)
    local context state line ret=1
    typeset -A opt_args

    _arguments -s \
      '-n[ignore stdin]' \
      '-l[specify login user name]:login as:_rlogin_users' \
      ':remote host name:_rlogin_hosts' \
      '(-):command: _command_names -e' \
      '*::command:->command' && ret=0

    if [[ -n "$state" ]]; then
      shift 1 words
      (( CURRENT-- ))
      _normal && ret=0
    fi
    return ret
    ;;
  rcp)
    local curcontext="$curcontext" state line ret=1 expl
    typeset -A opt_args

    _arguments -C -s \
      '-p[preserve modification times]' \
      '-r[recursively copy directories]' \
      '*:files:->files' && ret=0

    if [[ -n "$state" ]]; then
      if compset -P '*:'; then
	_files && ret=0
      elif compset -P '*@'; then
        _wanted hosts expl host _rlogin_hosts -S: -q && ret=0
      else
        _alternative \
	    'files:: _files' \
	    'hosts:: _rlogin_all_hosts -qS:' \
	    'users:: _rlogin_users -qS@' && ret=0
      fi
    fi
    return ret
    ;;    
  esac
}

_rlogin_users () {
  _tags users && _combination -s '[:@]' my-accounts users-hosts users "$@"
}

_rlogin_hosts () {
  _tags hosts &&
      if [[ "$IPREFIX" == *@ ]]; then
        _combination -s '[:@]' my-accounts users-hosts "users=${IPREFIX/@}" hosts "$@"
      else
        _combination -s '[:@]' my-accounts users-hosts \
            ${opt_args[-l]:+"users=${opt_args[-l]:q}"} hosts "$@"
      fi
}

_rlogin_all_hosts () {
  _tags hosts && _combination -s '[:@]' my-accounts users-hosts hosts "$@"
}

_rlogin "$@"