calculate umask. Economize memory (we do not need to keep umask anymore)
umask
Utilities
result = umask()
Return value
A 3d array corresponding to umask.
Examples
Used like if umask was a known array by substituing umask by (umask())
For example: Instaed of write umask[domainef] we have to write (umask())[domainef]
MODIFICATION HISTORY: Sebastien Masson (smasson@lodyc.jussieu.fr)
11/12/98
??/6/99 introduction of the key_shift
20/9/99 cas jpk=1 (Thanks to jpblod@ipsl.jussieu.fr)