- assign_string (&stat_info->uname, header->header.uname);
- assign_string (&stat_info->gname, header->header.gname);
+ assign_string (&stat_info->uname,
+ header->header.uname[0] ? header->header.uname : NULL);
+ assign_string (&stat_info->gname,
+ header->header.gname[0] ? header->header.gname : NULL);