EXFAT_ATTR_SYSTEM
#define EXFAT_ATTR_RWMASK (EXFAT_ATTR_HIDDEN | EXFAT_ATTR_SYSTEM | \
attr &= (EXFAT_ATTR_READONLY | EXFAT_ATTR_HIDDEN | EXFAT_ATTR_SYSTEM |
if (((attr | oldattr) & EXFAT_ATTR_SYSTEM) &&