#!/bin/bash
# 
# handler -- anrxc's acpid handler for Lenovo ThinkPad T420
#
# Primary functions
#  - power button shuts down (if it generates an ACPI event on this board)
#  - sleep button suspends the machine to memory
#  - AC events start laptop_mode which also controls cpufreq (or throttling on old CPUs)
#  - battery alarm events auto-hibernate on low battery through laptop_mode
#  - lid handlers lock the screen when someone tries to open it


# X server configuration
xuser="anrxc"
xauth="/home/$xuser/.Xauthority"
xdisp=":0.0"

# CPU frequency configuration
cmins=$(cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq)
cmaxs=$(cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq)
csets="/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed"


set $*

case "$1" in
    button/power)
        case "$2" in
            PWRF|PBTN) logger "PowerButton pressed: $2 - system shutdown"
                       /sbin/shutdown -h now
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    button/sleep)
        case "$2" in
            SLPB|SBTN) logger "SleepButton pressed: $2 - suspending to RAM"
                       /usr/sbin/pm-suspend
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    button/battery)
        case "$2" in
            BAT) logger "BatteryButton pressed: $2 - not acting"
                 #XAUTHORITY=$xauth /bin/su $xuser -c "acpitool -b | xmessage -display $xdisp -timeout 10 -file -"
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    button/zoom)
        case "$2" in
            ZOOM)
                logger "ZoomButton pressed: $2 - not acting"
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    button/lid)
        case "$3" in
            close)
                XAUTHORITY=$xauth /usr/bin/xset -display $xdisp dpms force off
                logger "ACPI action executed: DPMS forced off"
            ;;
            open)
                XAUTHORITY=$xauth /bin/su $xuser -c "/usr/lib/kde4/libexec/kscreenlocker --forcelock --display $xdisp"
                logger "ACPI action executed: screen lock"
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    ac_adapter)
        case "$2" in
            AC|ACAD|ADP0|ADP1|ACPI0003:00)
                case "$4" in
                    00000000)
                        /etc/rc.d/laptop-mode restart
                        #echo -n $cmins >$csets
                        logger "ACPI action executed: ADP ($2) offline"
                    ;;
                00000001)
                        /etc/rc.d/laptop-mode restart
                        #echo -n $cmaxs >$csets
                        logger "ACPI action executed: ADP ($2) online"
                ;;
                esac
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    battery)
        case "$2" in
            BAT0|BAT1|PNP0C0A:00)
                case "$4" in
                    00000000)
                        #/usr/sbin/laptop_mode auto
                        logger "ACPI action executed: no action for BAT ($2) offline"
                    ;;
                    00000001)
                        /usr/sbin/laptop_mode auto
                        logger "ACPI action executed: BAT ($2) online or ALARM triggered"
                    ;;
                esac
                ;;
            CPU0)
                logger "ACPI action executed: no action for CPU ($2) battery related event"
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    processor)
        case "$2" in
            CPU0|CPU1|LNXCPU:01)
                logger "ACPI action executed: CPU ($2) no action for possible thermal event"
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    video/brightnessup)
        case "$2" in
            BRTUP)
                logger "ACPI action executed: no action for brightnessup"
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    video/brightnessdown)
        case "$2" in
            BRTDN)
                logger "ACPI action executed: no action for brightnessdown"
            ;;
            *) logger "ACPI action undefined: $2" ;;
        esac
    ;;
    *)
        logger "ACPI group/action undefined: $1 / $2"
    ;;
esac