> 65535: > `(uid_t)(-1) == (gid_t)(-1)'. NOT TO BE USED, because it is the > error return sentinel value. Thats important. Remember for 2.4 we need to document 65536+ as free as well. Also we should avoid putting system users in 32768-65534 as this range is 'interesting' on older buggier NFS servers (sign extension to 32bits..)