- ensure hostname from gethostname() is nul-terminated in all cases
- minor KNF
- use MAXHOSTNAMELEN over various other values/defines
- be safe will buffers that hold hostnames
Save hostname in a permanent buffer, otherwise ruserok()
can trash it if it calls gethostbyname() or inet_ntoa().
Repeat by:
Add entries in .rhosts and login from a machine that does
not have an entry there. Notice that the error message
in syslog contains the last hostname in .rhosts and not
the original remote hostname.