CU
Section: User Commands (1C)
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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 telephone 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 output
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 `to' on remote system.
If `to' is omitted, the `from' name is used both places.
- ~~...
-
send
the line `~...'.
The
receive
process handles output diversions of the following 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.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- FILES
-
- SEE ALSO
-
- DIAGNOSTICS
-
- BUGS
-
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Time: 10:16:14 GMT, December 28, 2024