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NAME    [Toc]    [Back]

     tip, cu - connect to a remote system

SYNOPSIS    [Toc]    [Back]

     tip [-nv] [-speed] [system-name]
     cu [-ehot] [-a acu] [-l line] [-s speed] [-#] [phone-number]

DESCRIPTION    [Toc]    [Back]

     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
     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 AT&T UNIX.  This manual page describes only tip.

     The options are as follows:

     -a acu
           Set the acu.

     -e    For cu, use even parity.

     -h    For cu, echo characters locally (half-duplex mode).

     -l line
           For  cu, specify the line to use.  Either of the forms
like tty00 or
           /dev/tty00 are permitted.

     -n    No escape (disable tilde).

     -o    For cu, use odd parity.

     -s speed
           For cu, set the speed of the connection.  Defaults  to

     -t     For cu, connect via a hard-wired connection to a host
on a dial-up

     -v    Set verbose mode.

     For cu, if both -e and -o are given, then no parity is used.
This is the
     default behaviour.

     If  speed  is specified it will override any baudrate specified in the system
 description being used.

     If neither speed nor system-name are specified,  system-name
will be set
     to the value of the HOST environment variable.

     If  speed  is  specified but system-name is not, system-name
will be set to
     a value of 'tip' with speed appended.  e.g.  tip -1200  will
set system-
     name to 'tip1200'.

     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

           ~^D or ~.   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

           ~>           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.

           ~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 which
                       don't  support  the necessary ioctl() call
the break is
                       simulated by  a  sequence  of  line  speed
changes and DEL

           ~s          Set a variable (see the discussion below).

           ~v          List all variables and  their  values  (if

           ~^Z          Stop  tip  (only  available with job control).

           ~^Y         Stop only the ``local side'' of tip  (only
                       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.

     To  find the system description and thus the operating characteristics of
     system-name, tip searches for a system  description  with  a
name identical
     to system-name.  The search order is

           1.   If the environment variable REMOTE does not start
with a `/'
                it is assumed to be a system description, and  is

           2.    If the environment variable REMOTE begins with a
`/' it is assumed
 to be a path to a remote(5)  database,  and
the specified
                database is searched.

           3.    The  default remote(5) database, /etc/remote, is

     See remote(5) for full documentation on system descriptions.

     The  br capability is used in system descriptions to specify
the baud rate
     with which to establish a connection.  If the  value  specified is not
     suitable,  the baud rate to be used may be given on the command line,
     e.g., `tip -300 mds'.

     When tip establishes a connection it sends out  the  connection message
     specified in the cm capability of the system description being used.

     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 uucico.

     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 hardwareflow or tandem mode for flow control.
If the remote
     system  does  not  support  hardwareflow  or  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.  tip supports a variety of autocall
 units and modems with the at capability in  system  descriptions.

     Support  for  Ventel  212+ (ventel), Hayes AT-style (hayes),
     Courier (courier), Telebit T3000 (t3000) and Racal-Vadic 831
     units is enabled by default.

     Support  for  Bizcomp 1031[fw] (biz31[fw]), Bizcomp 1022[fw]
     DEC DF0[23]-AC (df0[23]), DEC DN-11 (dn11)  and  Racal-Vadic
3451 (v3451)
     units  can  be added by recompiling tip with the appropriate

     Note that if support for both the Racal-Vadic 831  and  3451
is enabled
     they are referred to as the v831 and v3451 respectively.  If
only one of
     the two is supported, it is referred to as vadic.

   VARIABLES    [Toc]    [Back]
     tip maintains a set of variables which  control  its  operation.  Some of
     these  variables  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.
     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.

     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 an
 during a ~< file transfer command; abbreviated

     eofwrite       (str)  The  string  sent  to indicate end-oftransmission during
 a ~> file  transfer  command;  abbreviated

     eol            (str) The set of characters which indicate an
                   tip will recognize escape characters only  after an end-ofline.

     escape         (char) The command prefix (escape) character;
                   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 ``0f.

     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
                   filesystem writes when receiving files; abbreviated fr.

     hardwareflow  (bool) Whether hardware flow control (CRTSCTS)
is enabled
                   for the connection;  abbreviated  hf;  default
value is `off'.

     host           (str)  The  name of the host to which you are
connected; abbreviated

     prompt        (char) The character which indicates  an  endof-line on the
                   remote  host; abbreviated pr; default value is
`0.  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
                   letters will be mapped to uppercase by tip for
                   to the remote machine.

     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

     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.

     tandem         (bool)  Use XON/XOFF flow control to throttle
data from the
                   remote host; abbreviated ta.  The default value is true unless
  the  nt capability has been specified in
                   in which case the default value is false.

     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.

ENVIRONMENT    [Toc]    [Back]

     SHELL       The name of the shell to use for the ~! command;
default value
 is ``/bin/sh''.

     HOME        The home directory to use for the ~c command.

     HOST        The default value for  system-name  if  none  is
specified via
                 the command line.

     REMOTE       A  system description, or an absolute path to a
remote(5) system
 description database.

     PHONES      A path to a phones(5) database.

FILES    [Toc]    [Back]

     /etc/remote             global remote(5) database
     /etc/phones             default phones(5) file
     ~/.tiprc                initialization file
     tip.record              record file
     /var/log/aculog         line access log
     /var/spool/lock/LCK..*  lock file to  avoid  conflicts  with

SEE ALSO    [Toc]    [Back]

     phones(5), remote(5)

HISTORY    [Toc]    [Back]

     The tip command appeared in 4.2BSD.

BUGS    [Toc]    [Back]

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

OpenBSD     3.6                        September     9,      2001
[ Back ]
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