tip(1)                                                           tip(1)

  tip

  NAME

    tip - connect to a remote system

  SYNOPSIS

    tip [-nv] -speed system-name
    tip [-nv] -speed phone-number

  DESCRIPTION

    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.
    ~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(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.
    ~t from [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 cat from;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.

  VARIABLES

    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.

  ENVIRONMENT

    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.

    HOST
        Check for a default host if none specified.

    The variables ${REMOTE} and ${PHONES} are also exported.

  FILES

    /etc/remote
        Global system descriptions

    /etc/phones
        Global phone number database

    ${REMOTE}
        Private system descriptions

    ${PHONES}
        Private phone numbers

    ~/.tiprc
        Initialization file

    tip.record
        Record file

    /var/log/aculog
        Line access log
    /var/spool/lock/LCK..*
        Lock file to avoid conflicts with uucp

  HISTORY

    The tip appeared command in 4.2BSD.

  BUGS

    The full set of variables is undocumented and should probably be pared
    down.