Add a SMART check using atactl(8) against disks that support and have

SMART enabled.
Committing now so that it gets broader testing.
Man page bits will be added once we are confident there is no side
effect and this can stay.
inputs from sthen@ halex@ weerd@
ok deraadt@

src/etc/daily

@@ -1,5 +1,5 @@
 #
-#	$OpenBSD: daily,v 1.74 2012/02/11 00:37:04 krw Exp $
+#	$OpenBSD: daily,v 1.75 2012/12/11 17:09:50 ajacoutot Exp $
 #	From: @(#)daily	8.2 (Berkeley) 1/25/94
 #
 # For local additions, create the file /etc/daily.local.
@@ -143,6 +143,15 @@ while [ "X$ROOTBACKUP" = X1 ]; do
 done
 
 next_part "Checking subsystem status:"
+for d in $(sysctl -n hw.disknames | grep -Eo '[sw]d[0-9]+'); do
+	if atactl ${d} 2>&1 | sed -n '/Device has enabled/,$p' | grep -q 'SMART feature set'; then
+		SMARTSTATUS=$(atactl ${d} smartstatus 2>&1 >/dev/null)
+		if [ "X${SMARTSTATUS}" != X"" ]; then
+			echo ""
+			echo "${d}: ${SMARTSTATUS}"
+		fi
+	fi
+done
 if [ "X$VERBOSESTATUS" != X0 ]; then
 	echo ""
 	echo "disks:"