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, giv‐
       ing 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 exe‐
                 cuted 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  pro‐
                 cess.   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  charac‐
       ters.  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 honor‐
       ing 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 read‐
       ing,  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 transmit‐
       ted character.

       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,  and  Bizcomp  1031  and  1032  integral  call
       unit/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
       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 concate‐
       nating  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  fol‐
       lowing  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 and end-of-tranmission
              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  sys‐
              tem writes when receiving files; abbreviated fr.

       host
              (str)  The name of the host to which you are connected; abbrevi‐
              ated 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 ‘^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
              betwee 040 and 0177).  The variable exceptions is used to  indi‐
              cate characters which are an exception to the normal beautifica‐
              tion 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 ALSO
       remote(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)
 
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