03-14-2014
The login process will empty the input buffer before reading the password you type. I suspect it was designed this way to stop people automating login.
Of course, where there is a will to automate, someone usually achieves it, hence why expect was created. Without a tool like expect on the client side, you will not be able to automate a telnet login. An alternate is to set up services to accept rlogin, rsh/resh/remsh or ssh.
Robin
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LEARN ABOUT ULTRIX
rlogin
rlogin(1c) rlogin(1c)
Name
rlogin - remote login
Syntax
rlogin rhost [-ec] [-8] [-L] [-l username]
rhost [-ec] [-8] [-L] [-l username]
Description
The command connects your terminal on the current local host system, lhost, to the remote host system, rhost.
Each host has a file which contains a list of rhosts with which it shares account names. The host names must be the standard names as
described in When you use the command to login as the same user on an equivalent host, you do not need to specify a password.
You can also have a private equivalence list in a file .rhosts in your login directory. Each line in this file should contain the rhost
name and a username separated by a space, giving additional cases where logins without passwords are permitted. If the originating user is
not equivalent to the remote user, then the remote system prompts for a login and password as in
To avoid security problems, the .rhosts file must be owned by either the remote user or root and it may not be a symbolic link.
Your remote terminal type is the same as your local terminal type, which is specified by your environment TERM variable. Except for
delays, all echoing takes place at the remote site so the rlogin is transparent. Flow control by and <CTRL/Q>, and flushing of input and
output on interrupts are handled properly. The optional argument -8 allows an eight-bit input data path at all times. Otherwise, parity
bits are stripped except when the remote site's stop and start characters are other than and <CTRL/Q>. A tilde followed by a dot (~.) on a
separate line disconnects from the remote host, where the tilde (~) is the escape character. Similarly, a tilde followed by <CTRL/Z> (~
<CTRL/Z>), where is the suspend character, suspends the rlogin session.
Substitution of the delayed-suspend character, which is normally <CTRL/Y>, for the suspend character suspends the send portion of the
rlogin, but allows output from the remote system. A different escape character may be specified by the -e option. There is no space sepa-
rating this option flag and the argument character.
Options
-8 Allows an 8-bit input data path at all times.
-ec Uses the specified character as the escape character. If not specified, uses a tilde (~).
-l username Logs you in as the specified user, not as your user login name.
-L Runs session in litout mode.
Files
/usr/hosts/* for rhost version of the command
See Also
rsh(1c)
rlogin(1c)