The tip(1) command establishes a full-duplex connection
to another computer, giving the appearance of being logged in
directly on the remote CPU. You must have a login on the computer
(or equivalent) to which you want to connect.
The options are as follows:
-v
Set verbose mode.
-n
No escape (disable tilde).
Typed characters are usually transmitted directly to the remote
computer (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 or ~.
Drop the connection and exit (you can still be logged in on the
remote computer).
~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(1)).
~>
Copy file from local to remote. The tip(1) command
prompts for the name of a local file to transmit.
~<
Copy file from remote to local. The tip(1) command
prompts first for the name of the file to be sent, then for a
command to be executed on the remote computer.
~pfrom [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(1) sends it the from
file. If the to file name is not specified the from
file name is used. This command is actually a UNIX-specific version
of the ~> command.
~tfrom [to]
Take a file from a remote UNIX host. As with the put
command, the to file name defaults to the from file
name if it is not specified. The remote host executes the command
string catfrom;echo ^A to send the file to
tip(1).
~|
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.
~C
Fork a child process on the local system to perform special
protocols, such as XMODEM. The child program will be run with the
following somewhat unusual arrangement of file descriptors:
0 <-> local tty in
1 <-> local tty out
2 <-> local tty out
3 <-> remote tty in
4 <-> remote tty out
~#
Send a BREAK to the remote system. For systems that do not
support the necessary ioctl(2) call, the break is simulated by a sequence
of line-speed changes and DEL characters.
~s
Set a variable (see the discussion later in this topic).
~^Z
Stop tip(1) (only available with job control).
~^Y
Stop only the local side of tip(1) (only available with
job control); the remote side of tip(1), that is, the side
that displays output from the remote host, is left running.
~?
Get a summary of the tilde (~)escapes.
The tip(1) command uses the file /etc/remote to
determine how to reach a particular system and to then determine
how it should operate while talking to the system; see
remote 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 can be specified on the
command line; for example, tip -300 mds.
When tip(1) establishes a connection, it sends out a
connection message to the remote system; the default value, if any,
is defined in /etc/remote (see remote).
When tip(1) prompts for an argument (for example, during
setup of a file transfer) the line typed can 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 computer.
The tip(1) command 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
uucico.
During file transfers, tip(1) 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 can be set to indicate tip(1) should
synchronize with the remote system on the echo of each transmitted
character.
When tip(1) must dial a phone number to connect to a
system, it will print various messages indicating its actions. The
tip(1) command supports the DEC DN Ns-11 and Racal-Vadic 831
auto-call-units; the DEC DF02 and DF03, Ventel 212+, Racal-Vadic
3451, and Bizcomp 1031 and 1032 integral call unit/modems.
The tip(1) command maintains a set of variables which
controls its operation. Some of these variables are read-only to
normal users (root is allowed to change anything of interest).
Variables can 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 can request a 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 can
be reset by prepending a ! to the name. Other variable types
are set by concatenating an = and the value. The entire
assignment must not contain any blanks. A single set command can be
used to interrogate as well as set a number of variables. Variables
can 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(1) 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.
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 that signify an 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 that indicate an end-of-line. The
tip(1) command 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 that 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 write operations when receiving files; abbreviated
fr.
host
(str) The name of the host to which you are connected;
abbreviated ho.
prompt
(char) The character that indicates an 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) Uppercase mapping mode; abbreviated ra; default
value is off. When this mode is enabled, all lowercase letters will
be mapped to uppercase by tip(1) for transmission to the
remote computer.
raisechar
(char) The input character used to toggle uppercase 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(1) will record everything
transmitted by the remote computer 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 that 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 eight
spaces.
verbose
(bool) Verbose mode; abbreviated verb; default is true.
When verbose mode is enabled, tip(1) prints messages while
dialing, shows the current number of lines transferred during a
file transfer operations, and more.