# get filename from yesterday
($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) 
= localtime(time()-24*3600);
$mon++;
if(length($mon)==1) { $mon="0$mon"; }
if(length($mday)==1) { $mday="0$mday"; }
$yesterday = "\_$year$mon$mday.zip";
print "Need to get file $yesterday\n";