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-@node Invoking
-@chapter Invoking
-
-@command{vtchs} ignores the command line
-and the environment variables. You cannot
-control its behaviour.
-
-However, it is required that standard input
-is a @file{/dev/tty} device. If this programs
-is running under root,
-@example
-vtchs < /dev/tty1
-@end example
-@noindent
-is sufficient. Non-root users need to find
-a TTY that they have access to. If your
-shell is GNU Bash, you can use
-@example
-vtchs < "/dev/tty$( i=1;
-                    while true; do
-                      if ! test -e /dev/tty$i; then
-                        exit 1;
-                      fi;
-                      exec < /dev/tty$i &&
-                      echo $i &&
-                      exit 0 ||
-                      : $(( i++ ));
-                    done 2>/dev/null
-                  )"
-@end example
-