#!/bin/sh -e

if [ -r /dev/mem -a -x /usr/sbin/dmidecode ]; then
        # dmidecode to grab the Chassis type
        dmitype=$(dmidecode|grep Chassis -A 10|grep -m1 Type|sed -e 's/.*Type: \(.*\)/\1/')

        if test "$dmitype" = "Notebook" || test "$dmitype" = "Portable"; then
                exit 0;
        fi
fi

# check for any ACPI batteries
if [ -d /proc/acpi/battery ]; then
        results=`find /proc/acpi/battery/ -mindepth 1 -type d`
        if [ ! -z "$results" ]; then
                exit 0
        fi
fi

# check for APM batteries. This sucks, because we'll only get a valid response
# if the laptop has a battery fitted at the time
if [ -f /proc/apm ]; then
    battery=`awk '{print $6}' </proc/apm`
    if [ "$battery" != "0xff" ] && [ "$battery" != "0x80" ]; then
	# There's a battery
	exit 0;
    fi
fi

#probably not a laptop; exit 
exit 1