/var/log/squid/access.log {
    postrotate
        /usr/bin/killall -USR1 sqid
    endscript
}

/var/log/squid/cache.log {
    postrotate
        /usr/bin/killall -USR1 sqid
    endscript
}

/var/log/squid/store.log {
    postrotate
        /usr/bin/killall -USR1 sqid
    endscript
}
