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# Our ~/.profile should already have made a directory with the supported
# options for us; if not, we won't be wrapping bc(1) with a function at all
[ -d "$HOME"/.cache/sh/opt/bc ] || return

# Define function proper
bc() {

    # Add --quiet to stop the annoying welcome banner
    if [ -e "$HOME"/.cache/sh/opt/bc/quiet ] ; then
        set -- --quiet "$@"
    fi

    # Run bc(1) with the concluded arguments
    command bc "$@"
}