0anacron

#!/bin/sh
# Check whether 0anacron was run today already
if test -r /var/spool/anacron/cron.daily; then
    day=`cat /var/spool/anacron/cron.daily`
fi
if [ `date +%Y%m%d` = "$day" ]; then
    exit 0
fi

# Check whether run on battery should be allowed
if test -r /etc/default/anacron; then
    . /etc/default/anacron
fi

if [ "$ANACRON_RUN_ON_BATTERY_POWER" != "yes" ]; then

    # Do not run jobs when on battery power
    online=1
    for psupply in /sys/class/power_supply/* ; do
        if [ `cat "$psupply/type" 2>/dev/null`x = Mainsx ] && [ -f "$psupply/online" ]; then
            if [ `cat "$psupply/online" 2>/dev/null`x = 1x ]; then
                online=1
                break
            else
                online=0
            fi
        fi
    done
    if [ $online = 0 ]; then
        exit 0
    fi

fi
/usr/sbin/anacron -s