B_MAIL_ATTR_FLAGS
fs_create_index(volume.Device(), B_MAIL_ATTR_FLAGS, B_INT32_TYPE, 0);
file.WriteAttr(B_MAIL_ATTR_FLAGS, B_INT32_TYPE, 0, &flags, sizeof(int32));
attributed->WriteAttr(B_MAIL_ATTR_FLAGS, B_INT32_TYPE, 0, &flags,
fs_create_index(device, B_MAIL_ATTR_FLAGS, B_INT32_TYPE, 0);
query.PushAttr(B_MAIL_ATTR_FLAGS);
query.PushAttr(B_MAIL_ATTR_FLAGS);
if (node.ReadAttr(B_MAIL_ATTR_FLAGS, B_INT32_TYPE, 0, &flags, sizeof(int32))