[O]

[..]
  1. OCF_RA_DIR
  2. OCF_ROOT_DIR
  3. OFFLINESTATUS
  4. ONLINESTATUS
  5. ON_LINUX
  6. OP
  7. OPENAIS_EXTERNAL_SERVICE
  8. OPTARGS
  9. O_CIB_RESTART
  10. O_DC_TIMER_RESTART
  11. O_EXIT
  12. O_LRM_RECONNECT
  13. O_PE_RESTART
  14. O_RELEASE
  15. O_TE_RESTART
[..]