CU(1C) CU(1C)
NAME
cu - call UNIX
SYNOPSIS
cu telno [ -t ] [ -s speed ] [ -a acu ] [ -l line ]
DESCRIPTION
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
system.
~!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
places.
~%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:
~>[>][:]file
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
places.
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.
FILES
/dev/cua0
/dev/cul0
/dev/null
SEE ALSO
dn(4), tty(4)
DIAGNOSTICS
Exit code is zero for normal exit, nonzero (various values)
otherwise.
BUGS
The syntax is unique.