plgfam: Get family file parameters 

DESCRIPTION:

    Gets information about current family file, if familying is enabled. 
    See the PLplot documentation for more information. 

SYNOPSIS:

plgfam(fam, num, bmax)

ARGUMENTS:

    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.