  plgfam(fam, num, bmax)
  **********************

  plgfam

  Gets information about current family file, if familying is enabled. See
  Section [*] for more information.

  fam (PLINT *, output): Pointer to variable with the boolean family flag
  value. If nonzero, familying is enabled.

  num (PLINT *, output): Pointer to variable with the current family file
  number.

  bmax (PLINT *, output): Pointer to variable with the maximum file size
  (in bytes) for a family file.

