ZSHARED
ASSERT(!(flag & ZSHARED) || !(flag & ZHAVELOCK));
if ((flag & ZSHARED) && dl->dl_sharecnt != 0)
if ((flag & ZSHARED) && ++dl->dl_sharecnt > 1 && dl->dl_namesize == 0) {
zf = ZEXISTS | ZSHARED;
ZXATTR | ZEXISTS | ZSHARED, NULL, NULL);