$_

Basic Rotation Script
#!/usr/local/bin/perl
$LOGPATH='/usr/local/apache/logs';
@LOGNAMES=('access_log','error_log','referer_log','agent_log');
$PIDFILE = 'httpd.pid';
$MAXCYCLE = 4;
chdir $LOGPATH; # Change to the log directory
foreach $filename (@LOGNAMES) {
for (my $s=$MAXCYCLE; $s >= 0; $s-- ) {
$oldname = $s ? "$filename.$s" : $filename;
$newname = join(".",$filename,$s+1);
rename $oldname,$newname if -e $oldname;
}
}
kill 'HUP',`cat $PIDFILE`;