03-21-2019
I think the problem lies in the escaping of the $ sign when expanding variables in your here document. Just as a rule of thumb: escape it to use a "remote" variable, don't escape it for using local vars. Having local and remote variables with identical names doesn't help debugging nor understanding what's going on...
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LEARN ABOUT FREEBSD
rlogin
RLOGIN(1) BSD General Commands Manual RLOGIN(1)
NAME
rlogin -- remote login
SYNOPSIS
rlogin [-468DEd] [-e char] [-i localname] [-l username] host
DESCRIPTION
The rlogin utility starts a terminal session on a remote host host.
The standard Berkeley rhosts authorization mechanism is used.
The following options are available:
-4 Use IPv4 addresses only.
-6 Use IPv6 addresses only.
-8 Allow an eight-bit input data path at all times; otherwise parity bits are stripped except when the remote side's stop and start char-
acters are other than ^S/^Q.
-D Set the TCP_NODELAY socket option which can improve interactive response at the expense of increased network load.
-E Stop any character from being recognized as an escape character. When used with the -8 option, this provides a completely transparent
connection.
-d Turn on socket debugging (see setsockopt(2)) on the TCP sockets used for communication with the remote host.
-e Allow user specification of the escape character, which is ``~'' by default. This specification may be as a literal character, or as
an octal value in the form
nn.
-i Allow the caller to specify a different local name to be used for authentication. This option is restricted to processes with uid 0.
-l Specify a different username for the remote login. If this option is not specified, your local username will be used.
A line of the form ``<escape char>.'' disconnects from the remote host. Similarly, the line ``<escape char>^Z'' will suspend the rlogin ses-
sion, and ``<escape char><delayed-suspend char>'' suspends the send portion of the rlogin session, but allows output from the remote system.
By default, the tilde (``~'') character is the escape character, and normally control-Y (``^Y'') is the delayed-suspend character.
All echoing takes place at the remote site, so that (except for delays) the rlogin is transparent. Flow control via ^S/^Q and flushing of
input and output on interrupts are handled properly.
ENVIRONMENT
The following environment variable is utilized by rlogin:
TERM Determines the user's terminal type.
FILES
/etc/hosts
/etc/hosts.equiv
$HOME/.rhosts
SEE ALSO
login(1), rsh(1), telnet(1), setsockopt(2), ruserok(3), tty(4), hosts(5), hosts.equiv(5), rlogind(8), rshd(8)
HISTORY
The rlogin command appeared in 4.2BSD.
IPv6 support was added by WIDE/KAME project.
BUGS
The rlogin utility will be replaced by telnet(1) in the near future.
More of the environment should be propagated.
BSD
September 26, 2003 BSD