Add a nextboot script to make it easier to control the loader nextboot

support. Also, hook it up to the build.

Approved by:	jake (mentor)

sbin/reboot/Makefile

@@ -14,4 +14,6 @@ MLINKS+= boot_${MACHINE}.8 boot.8
 LINKS=	${BINDIR}/reboot ${BINDIR}/halt ${BINDIR}/reboot ${BINDIR}/fastboot \
 	${BINDIR}/reboot ${BINDIR}/fasthalt
 
+SCRIPTS=	nextboot.sh
+
 .include <bsd.prog.mk>

sbin/reboot/nextboot.sh

@@ -0,0 +1,57 @@
+#! /bin/sh
+#
+# Copyright 2002. Gordon Tetlow.
+# gordon@FreeBSD.org
+#
+# $FreeBSD$
+
+delete="NO"
+force="NO"
+nextboot_file="/boot/nextboot.conf"
+
+display_usage() {
+	echo "Usage: nextboot [-f] [-o options] -k kernel"
+	echo "       nextboot -D"
+}
+
+while getopts "Dfk:o:" argument ; do
+	case "${argument}" in
+	D)
+		delete="YES"
+		;;
+	f)
+		force="YES"
+		;;
+	k)
+		kernel="${OPTARG}"
+		;;
+	o)
+		kernel_options="${OPTARG}"
+		;;
+	*)
+		display_usage
+		exit 1
+		;;
+	esac
+done
+
+if [ ${delete} = "YES" ]; then
+	rm -f ${nextboot_file}
+	exit 0
+fi
+
+if [ "xxx${kernel}" = "xxx" ]; then
+	display_usage
+	exit 1
+fi
+
+if [ ${force} = "NO" -a ! -d /boot/${kernel} ]; then
+	echo "Error: /boot/${kernel} doesn't exist. Use -f to override."
+	exit 1
+fi
+
+cat > ${nextboot_file} << EOF
+nextboot_enable="YES"
+kernel="${kernel}"
+kernel_options="${kernel_options}"
+EOF