auto update pepperflashplugin using update-pepperflashplugin-nonfree in debian/ubuntu based distributions

autoupdate-pepperflashplugin

#!/bin/bash
# Parameters
#        <maxinterval> <probability>
#               Updates the pepperflashplugin randomly, guaranteeing there
#               won't be more than <maxinterval> seconds between each
#               update.  Otherwise, there is a a 1 in <probability>
#               chance that an update will occur.


maxinterval=$1
probability=$2
statefile=/var/lib/update-pepperflashplugin/state.info

if [ -z $maxinterval ] || [ -z $probability ]; then
    echo "usage $0 <maxinterval> <probability>"
    exit 1
fi

current_date=$(date +'%s')
mkdir -p $(dirname $statefile)

if [ -f $statefile ]; then
    last_run=$(date +%s -r $statefile)
else
    last_run=0;
fi


function random(){
    if [ $(($probability % 32768)) = 0 ]; then
        r=$(($RANDOM % $probability))
    else
        r=$(($RANDOM * $probability / 32768))
   fi
   return $([ $r = 1 ]);
}

since_last_run=$(($current_date - $last_run));

if [ $since_last_run -ge $maxinterval ] || random; then
    /usr/sbin/update-pepperflashplugin-nonfree --install --quiet &&
    touch $statefile
fi

update-pepperflashplugin.cron.hourly

#!/bin/bash
# approxymatively update once a day (12 invokations a day, 1 in 12 chance
# that the update will occur), but ensure that there will never be more
# than two days (172800 seconds) interval between updates.
/path/to/autoupdate-pepperflashplugin 172800 12