Pull in the encoding/decoding functions for struct dos_partition.

Add a very simple regression test for "fdisk -I".

sbin/fdisk/Makefile

@@ -1,7 +1,13 @@
 # $FreeBSD$
 
 PROG=	fdisk
+SRCS=	fdisk.c geom_mbr_enc.c
 WARNS=	4
 MAN=	fdisk.8
 
+.PATH:	${.CURDIR}/../../sys/geom
+
 .include <bsd.prog.mk>
+
+test:	${PROG}
+	sh ${.CURDIR}/runtest.sh

sbin/fdisk/runtest.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+# $FreeBSD$
+
+set -e
+MD=`mdconfig -a -t malloc -s 4m -x 63 -y 16`
+if [ ! -c /dev/${MD} ] ; then
+	echo "MD device $MD did not materialize" 1>&2
+	exit 2
+fi
+trap "mdconfig -d -u ${MD}" EXIT INT TERM
+
+# Create an empty bootcode file to isolate our checksum from any changes
+# which might happen to the boot code file.
+dd if=/dev/zero of=tmp count=1 > /dev/null 2>&1
+./fdisk -b tmp -I $MD > /dev/null 2>&1
+rm tmp
+
+c=`dd if=/dev/${MD} count=1 2>/dev/null | md5`
+if [ $c != 509b44919d3921502bd31237c4bb1f75 ] ; then
+	echo "FAILED: fdisk -I gives bad checksum" 1>&2
+	exit 1
+fi
+echo "PASSED: fdisk -I"
+exit 0