tip(1C) tip(1C)
NAME
tip, cu - connect to a remote system
SYNOPSIS
tip [-v] [-speed] system-name
tip [-v] [-speed] phone-number
cu phone-number [-t] [-s speed] [ -a acu] [-l line] [-#]
DESCRIPTION
tip and cu establish a full-duplex connection to another
machine, giving the appearance of being logged in directly
on the remote cpu. It goes without saying that you must
have a login on the machine (or equivalent) to which you
wish to connect. The preferred interface is tip. The cu
interface is included for those people used to the call UNIX
command of version 7. This manual page describes only tip.
Typed characters are normally transmitted directly to the
remote machine (which does the echoing as well). A tilde
()appearing as the first character of a line is an escape
signal; the following are recognized:
-d. 'u
.ft3 -d . Drop the connection and exit (you may still
be logged in on the remote machine).
c [name]
Change directory to name (no argument implies change to
your home directory).
! Escape to a shell (exiting the shell will return you to
tip).
> Copy file from local to remote. tip prompts for the
name of a local file to transmit.
< Copy file from remote to local. tip prompts first for
the name of the file to be sent, then for a command to
be executed on the remote machine.
p from [to]
Send a file to a remote UNIX® host. The put command
causes the remote UNIX system to run the command string
cat>'to', while tip sends it the from file. If the to
file isn't specified, the from filename is used. This
command is actually a UNIX-specific version of the >
command.
t from [to]
Take a file from a remote UNIX host. As in the put
command, the to file defaults to the from filename if
the to file isn't specified. The remote host executes
the command string:
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cat 'from';echo CONTROL-a
to send the file to tip.
| Pipe the output from a remote command to a local UNIX®
process. The command string sent to the local UNIX
system is processed by the shell.
# Send a BREAK to the remote system. For systems that do
not support the necessary ioctl call, the break is
simulated by a sequence of line speed changes and
DELETE characters.
s Set a variable (see the discussion below).
^Z Stop tip (available only with job control).
? Get a summary of the tilde escapes
tip uses the file /etc/remote to find how to reach a
particular system and to find out how it should operate
while talking to the system; refer to remote(5) for a full
description. Each system has a default baud rate with which
to establish a connection. If this value is not suitable,
the baud rate to be used may be specified on the command
line, e.g., tip -300 mds.
When tip establishes a connection, it sends out a connection
message to the remote system; the default value, if any, is
defined in /etc/remote.
When tip prompts for an argument (e.g., during setup of a
file transfer), the line typed may be edited with the
standard erase and kill characters. A null line in response
to a prompt, or an interrupt, will abort the dialogue and
return you to the remote machine.
tip guards against multiple users connecting to a remote
system by opening modems and terminal lines with exclusive
access, and by honoring the locking protocol used by
uucp(1C).
During file transfers, tip provides a running count of the
number of lines transferred. When using the > and <
commands, the eofread and eofwrite variables are used to
recognize end-of-file when reading, and specify end-of-file
when writing (see below). File transfers normally depend on
ixon/ixoff mode for flow control (see stty(1)). If the
remote system does not support ixon/ixoff mode, echocheck
may be set to indicate that tip should synchronize with the
remote system on the echo of each transmitted character.
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When tip must dial a phone number to connect to a system, it
will print various messages indicating its actions. tip
supports the DEC DN-11 and Racal-Vadic 831 auto-call-units;
the DEC DF02 and DF03, Ventel 212+, Racal-Vadic 3451,
Bizcomp 1031 and 1032 integral call unit/modems, and Apple
modems.
VARIABLES
tip maintains a set of variables which control its
operation. Some of these variable are read-only to normal
users (root is allowed to change anything of interest).
Variables may be displayed and set through the s escape.
The syntax for variables is patterned after vi(1) and
mailx(1). Supplying all as an argument to the set command
displays all variables readable by the user. Alternatively,
the user may request display of a particular variable by
attaching a ? to the end. For example, ESCAPE? displays the
current escape character.
Variables are numeric, string, character, or boolean values.
Boolean variables are set merely by specifying their names;
they may be reset by prefixing a ! to the name. Other
variable types are set by concatenating an = and the value.
The entire assignment must not have any blanks in it. A
single set command may be used to interrogate as well as set
a number of variables. Variables may be initialized at run
time by placing set commands (without the s prefix in a file
.tiprc in one's home directory). The -v flag option causes
tip to display the sets as they are made. Certain common
variables have abbreviations. The following is a list of
common variables, (data type, in parentheses), description,
their abbreviations, and their default values:
beautify (bool) Discard unprintable characters when a
session is being scripted; abbreviated be.
baudrate (num) The baud rate at which the connection was
established; abbreviated ba.
dialtimeout (num) When dialing a phone number, the time (in
seconds) to wait for a connection to be
established; abbreviated dial.
echocheck (bool) Synchronize with the remote host during
file transfer by waiting for the echo of the
last character transmitted; default is off.
eofread (str) The set of characters which signify and
end-of-tranmission during a < file transfer
command; abbreviated eofr.
eofwrite (str) The string sent to indicate end-of-
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transmission during a > file transfer command;
abbreviated eofw.
eol (str) The set of characters which indicate an
end-of-line. tip will recognize escape
characters only after an end-of-line.
ESCAPE (char) The command prefix (escape) character;
abbreviated es; default value is tilde ().
exceptions (str) The set of characters which should not be
discarded due to the beautification switch;
abbreviated ex; default value is \t\n\f\b.
force (char) The character used to force literal data
transmission; abbreviated fo; default value is
CONTROL-p.
framesize (num) The amount of data (in bytes) to buffer
between file system writes when receiving
files; abbreviated fr.
host (str) The name of the host to which you are
connected; abbreviated ho.
prompt (char) The character which indicates and end-
of-line on the remote host; abbreviated pr;
default value is \n. This value is used to
synchronize during data transfers. The count
of lines transferred during a file transfer
command is based on recipt of this character.
raise (bool) Upper case mapping mode; abbreviated ra;
default value is off. When this mode is
enabled, all lower case letters will be mapped
to upper case by tip for transmission to the
remote machine.
raisechar (char) The input character used to toggle upper
case mapping mode; abbreviated rc; default
value is CONTROL-a.
record (str) The name of the file in which a session
script is recorded; abbreviated rec; default
value is tip.record.
script (bool) Session scripting mode; abbreviated sc;
default is off. When script is true, tip will
record everything transmitted by the remote
machine in the script record file specified in
record. If the beautify switch is on, only
printable ASCII characters will be included in
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the script file (those characters betwee 040
and 0177). The variable exceptions is used to
indicate characters which are an exception to
the normal beautification rules.
tabexpand (bool) Expand tabs to spaces during file
transfers; abbreviated tab; default value is
false. Each tab is expanded to 8 spaces.
verbose (bool) Verbose mode; abbreviated verb; default
is true. When verbose mode is enabled, tip
prints messages while dialing, shows the
current number of lines transferred during a
file transfer operations, and more.
SHELL (str) The name of the shell to use for the !
command; default value is /bin/sh, or taken
from the environment.
HOME (str) The home directory to use for the c
command; default value is taken from the
environment.
FILES
/usr/bin/cu
/usr/bin/tip
/etc/remote global system descriptions
/etc/phones global phone number data base
${REMOTE} private system descriptions
${PHONES} private phone numbers
/.tiprc initialization file
/usr/spool/uucp/LCK..* lock file to avoid conflicts with
uucp
DIAGNOSTICS
Diagnostics are, hopefully, self-explanatory.
SEE ALSO
remote(5), phones(5), cu(1),
``Using cu'' in Oreo Communications User's Guide.
BUGS
The full set of variables is undocumented and should,
probably, be pared down.
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