| TELNETLOGIN(8) | System Manager's Manual | TELNETLOGIN(8) |
telnetlogin —
login wrapper for telnetd
telnetlogin |
[-h host]
[-p] [username] |
telnetlogin is a setuid wrapper that runs
login(1). It is meant to be invoked by
telnetd(8); the idea is to remove the necessity of running
telnetd as root.
telnetlogin should be installed mode 4750,
user root, group telnetd. Then, telnetd may be run from
/etc/inetd.conf as user ``nobody'', group
``telnetd'', and with the option -L
path-to-telnetlogin.
telnetlogin accepts only the subset of
options to login(1) shown above, in the order listed. This
is the order telnetd(8) normally provides them in.
telnetlogin also does sanity checks on the
environment variables TERM, and
REMOTEHOST. It also insists that the standard input,
output, and error streams are open on a terminal, and that it is the process
group leader of the foreground process of that terminal. After checking all
of these conditions, checking the values of the above environment variables
for reasonable values, resetting signal handlers, and so forth, it execs
login.
telnetlogin does not permit the
-f option to login, so will not work with telnetds
that perform authentication via Kerberos or SSL.
THIS IS PRESENTLY EXPERIMENTAL CODE; USE WITH CAUTION.
telnetlogin was written during the
development of NetKit 0.17.
| April 12, 2000 | Linux NetKit (0.17) |