TIP(1C)TIP(1C)NAME
tip, cu - connect to a remote system
SYNOPSIStip [ -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 attached 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 ~. 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'' file name 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'' file name if it
isn't specified. The remote host executes the command string
``cat 'from';echo ^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.
~$ Pipe the output from a local UNIX process to the remote host.
The command string sent to the local UNIX system is processed
by the shell.
~# Send a BREAK to the remote system. For systems which don't
support the necessary ioctl call the break is simulated by a
sequence of line speed changes and DEL characters.
~s Set a variable (see the discussion below).
~^Z Stop tip (only available with job control).
~^Y Stop only the ``local side'' of tip (only available with job
control); the ``remote side'' of tip, the side that displays
output from the remote host, is left running.
~? 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 tandem mode for flow control. If the
remote system does not support tandem mode, ``echocheck'' may be set to
indicate tip should synchronize with the remote system on the echo of
each transmitted character.
When tip must dial a phone number to connect to a system it will print
various messages indicating its actions.
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
mail(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 name; they may be reset by
prepending 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 option causes tip to display
the sets as they are made. Certain common variables have
abbreviations. The following is a list of common variables, 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.
chardelay
(num) The character delay (in seconds) for a file transfer to a
remote host; abbreviated cdelay. The default value is 0
seconds.
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-
transmission during a ~< file transfer command; abbreviated
eofr.
eofwrite
(str) The string sent to indicate end-of-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 `~'.
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 `^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.
parity
(str) the parity to be generated during the connection. The
default value is none. Other values are odd, even, zero and
one.
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
receipt 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 `^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 the script file (those characters
between 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
/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 ALSOremote(5), phones(5)BUGS
The full set of variables is undocumented and should, probably, be
paired down.
4th Berkeley Distribution May 5, 1986 TIP(1C)