diff --git a/upscheck/upscheck b/upscheck/upscheck
new file mode 100644
index 0000000..8890ffc
--- /dev/null
+++ b/upscheck/upscheck
@@ -0,0 +1,29 @@
+#!/usr/bin/perl
+
+use warnings;
+use strict;
+
+use LWP::Simple;
+
+my %ups;
+my $content = get("http://intra.wsr.ac.at/informationssysteme/ups/");
+for my $line (split(/\n/, $content)) {
+    my ($oid, $value) = split(/\t/, $line);
+    $ups{$oid} = $value;
+}
+
+if (!defined $ups{'UPS-MIB::upsEstimatedMinutesRemaining.0'} ||
+    !defined $ups{'UPS-MIB::upsEstimatedChargeRemaining.0'}
+) {
+    die "can't get current charge";
+}
+
+my $min_minutes = rand(10) + 5;
+my $min_charge  = rand(10) + 5;
+
+if ($ups{'UPS-MIB::upsEstimatedMinutesRemaining.0'} < $min_minutes ||
+    $ups{'UPS-MIB::upsEstimatedChargeRemaining.0'}  < $min_charge
+) {
+    print STDERR "charge low: shutting down\n";
+    system("/sbin/shutdown", "-h", "+1");
+}