NAME
    calc_tty - restore normal input conditions for interactive use

SYNOPSIS
    calc_tty()

TYPES
    return	none if appears to be successful, error-value otherwise

DESCRIPTION
    This may enable a return to normal operation if abnormal activity
    results from a change of one or more terminal characteristics, as
    may occur when activity is resumed by an fg command after a ctrl-Z
    interrupt, or by any of the three commands:

		> !stty echo
		> !stty -cbreak
		> !stty echo -cbreak

EXAMPLE
    > calc_tty();

LIBRARY
    none

SEE ALSO
    none