completion file for lctl (Lustre Control)

lctl-2.sh

# file: lctl-2
# lctl parameter-completion

# The main menu is created by hand; I excluded deprecated/"dangerous" functions and some only relevant to interactive mode 
# The submenu for the get_param and set_param is auto-generated and replaces the actual device numbers (e.g., OST0030) 
# with * so that the list becomes manageable. 

LIST_PARAM=$(lctl list_param -R | grep -v '[0-9]$' | sed s/OST[0-f][0-f][0-f][0-f]/OST*/g)
CONTROL_PARAM="--net network net list_nids which_nid replace_nids interface_list peer_list conn_list active_tx route_list show_route ping help lustre_build_version device
device_list dl activate deactivate abort_recovery set_timeout conf_param local_param get_param set_param list_param debug_daemon debug_kernel dk debug_file df clear mark filter show debug_list modules blockdev_attach blockdev_detach blockdev_info pool_new pool_add pool_remove pool_destroy pool_list changelog_register changelog_deregister lfsck_start lfsck_stop set_route"

_lctl-2()   #  By convention, the function name starts with an underscore
{
  local cur prev 

  COMPREPLY=()   # Array variable storing the possible completions.
  cur=${COMP_WORDS[COMP_CWORD]}
  prev=${COMP_WORDS[COMP_CWORD-1]}

  if [ $COMP_CWORD -eq 1 ]; then
    COMPREPLY=( $(compgen -W "`echo $CONTROL_PARAM`" -- $cur) )
  elif [ $COMP_CWORD -eq 2 ]; then
    case "$prev" in
      "get_param"|"set_param")
        COMPREPLY=( $(compgen -W "$LIST_PARAM" -- $cur) )
        ;;
      *)
        ;;
    esac
  fi

  return 0
} &&

complete -F _lctl-2 lctl   #Invokes the function _lctl-2.