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     CU(1C)                                                     CU(1C)

          cu - call UNIX

          cu telno [ -t ] [ -s speed ] [ -a acu ] [ -l line ]

          Cu calls up another UNIX system, a terminal, or possibly a
          non-UNIX system.  It manages an interactive conversation
          with possible transfers of text files.  Telno is the tele-
          phone number, with minus signs at appropriate places for
          delays.  The -t flag is used to dial out to a terminal.
          Speed gives the transmission speed (110, 134, 150, 300,
          1200); 300 is the default value.

          The -a and -l values may be used to specify pathnames for
          the ACU and communications line devices.  They can be used
          to override the following built-in choices:

          -a /dev/cua0 -l /dev/cul0

          After making the connection, cu runs as two processes: the
          send process reads the standard input and passes most of it
          to the remote system; the receive process reads from the
          remote system and passes most data to the standard output.
          Lines beginning with `~' have special meanings.

          The send process interprets the following:

          ~.                terminate the conversation.
          ~EOT              terminate the conversation

          ~<file            send the contents of file to the remote
                            system, as though typed at the terminal.

          ~!                invoke an interactive shell on the local

          ~!cmd ...         run the command on the local system (via
                            sh -c).

          ~$cmd ...         run the command locally and send its out-
                            put to the remote system.

          ~%take from [to]  copy file `from' (on the remote system) to
                            file `to' on the local system.  If `to' is
                            omitted, the `from' name is used both

          ~%put from [to]   copy file `from' (on local system) to file

     CU(1C)                                                     CU(1C)

                            `to' on remote system.  If `to' is omit-
                            ted, the `from' name is used both places.

          ~~...             send the line `~...'.

          The receive process handles output diversions of the follow-
          ing form:

          zero or more lines to be written to file

          In any case, output is diverted (or appended, if `>>' used)
          to the file.  If `:' is used, the diversion is silent, i.e.,
          it is written only to the file.  If `:' is omitted, output
          is written both to the file and to the standard output.  The
          trailing `~>' terminates the diversion.

          The use of ~%put requires stty and cat on the remote side.
          It also requires that the current erase and kill characters
          on the remote system be identical to the current ones on the
          local system.  Backslashes are inserted at appropriate

          The use of ~%take requires the existence of echo and tee on
          the remote system.  Also, stty tabs mode is required on the
          remote system if tabs are to be copied without expansion.


          dn(4), tty(4)

          Exit code is zero for normal exit, nonzero (various values)

          The syntax is unique.