dell-battery

dell-battery.sh

#!/bin/bash
set -eu

cctk=/opt/dell/dcc/cctk

usage_error() {
        exec >&2
        echo "Error: $@"
        echo
        echo "Usage: $0 [MODE]"
        echo
        echo "Where MODE is one of: Standard, PrimAcUse, Adaptive, FullOnce[:<PCT=95>] or "
        echo "Custom[:<START=50>-<STOP=75>]."
        echo
        echo "If Custom is used, the battery will charge only when it's less than <START>%"
        echo "full and will stop when it reaches <STOP>%. <START> must be >= 50."
        echo
        echo "If FullOnce is used, it will charge the battery until <PCT>% one time and then "
        echo "set the previous mode again."
        echo
        echo "If no MODE is specified, the current mode is shown."
        exit 2
}

set_mode() {
        local mode=$1 pwd=$2
        sudo "$cctk" --PrimaryBattChargeCfg="$mode" "${pw:+--ValSetupPwd=$pw}"
}

PREV_MODE=

if test $# -eq 0
then
        echo "Options: Standard PrimAcUse Adaptive Custom[:<START=50>-<STOP=80>]"
        sudo "$cctk" --PrimaryBattChargeCfg
        exit 0
elif test $# -eq 1
then
        case "$1" in
        Standard|PrimAcUse|Adaptive)
                MODE=$1
                ;;
        Custom*)
                if test "$1" = "Custom"
                then
                        MODE="$1:50-75"
                elif echo "$1" | grep -q '^Custom:[5-9]\?[0-9]-1\?[0-9]\?[0-9]$'
                then
                        MODE="$1"
                else
                        usage_error "Unrecognized format for MODE Custom: $1"
                fi
                ;;
        FullOnce*)
                PCT=$(echo "$1" | cut -sd: -f2)
                if test -z "$PCT"
                then
                        PCT=95
                fi
                MODE="Standard"
                PREV_MODE=$(sudo "$cctk" --PrimaryBattChargeCfg | cut -d= -f2)
                ;;
        *)
                usage_error "Unknown MODE: $1"
                ;;
        esac
fi

if ! pw=$(/usr/bin/secret-tool lookup id leela-bios)
then
        exec >&2
        echo "Error: Failed to get password, please unlock the password" \
                "database, or type the BIOS password manually"
        exit 1
fi

set_mode "$MODE" "$pw"

if test -n "$PREV_MODE"
then
        trap 'r=$?; set_mode "$PREV_MODE" "$pw"; exit $r' EXIT
        echo "Waiting until charged to $PCT% ..."
        while test "$(upower -i /org/freedesktop/UPower/devices/battery_BAT0 \
                                | sed -En 's/\s*percentage:\s*([0-9]+)%/\1/p')" \
                        -lt "$PCT"
        do
                sleep 60
        done
fi