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DKCU ( 1C ) DKCU
NAME
dkcu – call another host
SYNOPSIS
dkcu [ – s ] [ – f ] [ – d ] [ – v ] [ – x ] destination
DESCRIPTION
dkcu dials another UNIX System, a terminal, or possibly a non-UNIX System. It
manages an interactive conversation with possible transfers of
ASCII files.
It places a call to the destination host or terminal on the data switch network.
Several options are supported by dkcu:
– s Suppresses the "Circuit Open" and other non-error messages.
– f Forces a dkcu even if the user came in as a remote executor.
– d Used to get tracing and diagnostic output.
– v Local environment variables may be passed from the calling host to the desti-
nation host by listing them in the local environment variable DKEXPORT
(such as, ’DKEXPORT=TERM,LINES,COLUMNS’). When using this
option, the destination should be appended by ’rl’ and ’vt’ flags (such as,
’dkcu - v destination.rl.vt’) and the user should be authorized [see
authorize(1M)] on the destination host.
– x Requests that XON/XOFF output flow control be done locally; otherwise,
XON/XOFF characters are passed through to the destination.
After making the connection, dkcu runs as two processes: the transmit process
reads data from standard input and, except for lines beginning with ’˜’, passes it to
the remote system. The receive process accepts data from the remote system and,
except for lines beginning with ’˜’, passes it to standard output. Lines beginning
with ’˜’ have special meanings.
The transmit process interprets the following:
˜ . Terminate the conversation. If the program on the remote
host isn’t reading input, typing the QUIT character twice,
rapidly, will break the connection.
˜ ! Escape to an interactive shell on the local system.
˜ !cmd . . . Run cmd on the local system (via ’sh – c’).
˜ $cmd . . . Run cmd locally and send its output as standard input to the
remote system for execution.
˜ %take from [ to ] Copy file from (on the remote system) to file to on the local
system. If to is omitted, the from argument is used in both
places.
E-6 Issue 3