;+
;
; @file_comments
; if needed, define and create myuniquetmpdir
; (common variable from cm_general) and add it to !path
;
; @categories 
; Utilities
;
; @examples
; IDL> def_myuniquetmpdir
;
; @uses
; cm_general
;
; @history
; Sebastien Masson (smasson\@lodyc.jussieu.fr)
;                      June 2005
;
; @version
; $Id$
;
;-
;
PRO def_myuniquetmpdir
;
  compile_opt idl2, strictarrsubs
;
@cm_general
;
  IF n_elements(myuniquetmpdir) EQ 0 THEN BEGIN
; define a new and unique directory in getenv('IDL_TMPDIR') by using systime(1)
; if possible, look for the login to make a more explicite name
    IF file_which(getenv('PATH'), 'whoami') ne '' THEN spawn, 'whoami', login, /noshell ELSE login = 'unknown'
    myuniquetmpdir = file_search(getenv('IDL_TMPDIR'), /mark_directory)
    myuniquetmpdir = myuniquetmpdir[0] + 'saxo_' + login[0] + '.' $
                     + strtrim(long(systime(1)), 1) + '/'
; create it
    file_mkdir, myuniquetmpdir
; add it to !path
    !path = myuniquetmpdir + path_sep(/search_path) + !path
  ENDIF
;

  return
end