_kern_open_attr
extern int _kern_open_attr(int fd, const char* path, const char *name,
status_t status = _kern_open_attr(fd, NULL, attribute, type, openMode);
status_t status = _kern_open_attr(AT_FDCWD, path, attribute, type, openMode);
int attrFD = _kern_open_attr(fFD, name, FSSH_O_RDONLY);
int attrFD = _kern_open_attr(fFD, name, FSSH_O_RDONLY);
int _kern_open_attr(int fd, const char *name, int openMode);