rescue,nextboot: Install nextboot as a link to reboot, rm nextboot.sh

Reboot now emulates the nextboot shell script completely. Retire the
nextboot.sh script and install the link. Retain the same manual page,
since there's enough differences between nextboot and reboot that
talking about nextboot would likely be confusing in nextboot.8

The nextboot.sh script no longer exists, so doesn't need to be fixed up
to create rescue. However, now we need a link from nextboot to reboot.

Sponsored by:		Netflix
Reviewed by:		kevans
Differential Revision:	https://reviews.freebsd.org/D43831
Differential Revision:	https://reviews.freebsd.org/D43843

3 files changed, 5 insertions, 144 deletions

diff --git a/rescue/rescue/Makefile b/rescue/rescue/Makefile
index de3dd8a64575..4c351e632638 100644
--- a/rescue/rescue/Makefile
+++ b/rescue/rescue/Makefile
@@ -21,13 +21,6 @@ LDFLAGS+=	-Wl,--allow-multiple-definition
 PROG=	rescue
 BINDIR?=/rescue
 
-# Shell scripts need #! line to be edited from /bin/sh to /rescue/sh
-SCRIPTS= nextboot_FIXED
-SCRIPTSNAME_nextboot_FIXED= nextboot
-nextboot_FIXED: ../../sbin/reboot/nextboot.sh
-	sed '1s/\/bin\//\/rescue\//' ${.ALLSRC} > ${.TARGET}
-CLEANFILES+= nextboot_FIXED
-
 SCRIPTS+= dhclient_FIXED
 SCRIPTSNAME_dhclient_FIXED= dhclient-script
 dhclient_FIXED: ../../sbin/dhclient/dhclient-script
@@ -185,7 +178,7 @@ CRUNCH_SRCDIR_zfs= ${SRCTOP}/cddl/sbin/zfs
 CRUNCH_SRCDIR_zpool= ${SRCTOP}/cddl/sbin/zpool
 CRUNCH_SRCDIR_zdb= ${SRCTOP}/cddl/usr.sbin/zdb
 .endif
-CRUNCH_ALIAS_reboot= fastboot halt fasthalt
+CRUNCH_ALIAS_reboot= fastboot halt fasthalt nextboot
 CRUNCH_ALIAS_restore= rrestore
 CRUNCH_ALIAS_dump= rdump
 CRUNCH_ALIAS_fsck_ffs= fsck_4.2bsd fsck_ufs
diff --git a/sbin/reboot/Makefile b/sbin/reboot/Makefile
index 4db6d5589e97..5e7a2fea15bf 100644
--- a/sbin/reboot/Makefile
+++ b/sbin/reboot/Makefile
@@ -13,9 +13,9 @@ MAN+=	boot_i386.8
 MLINKS+= boot_i386.8 boot.8
 .endif
 
-LINKS=	${BINDIR}/reboot ${BINDIR}/halt ${BINDIR}/reboot ${BINDIR}/fastboot \
-	${BINDIR}/reboot ${BINDIR}/fasthalt
-
-SCRIPTS=	nextboot.sh
+LINKS=	${BINDIR}/reboot ${BINDIR}/halt \
+	${BINDIR}/reboot ${BINDIR}/fastboot \
+	${BINDIR}/reboot ${BINDIR}/fasthalt \
+	${BINDIR}/reboot ${BINDIR}/nextboot
 
 .include <bsd.prog.mk>
diff --git a/sbin/reboot/nextboot.sh b/sbin/reboot/nextboot.sh
deleted file mode 100644
index 0c9cca51eb8d..000000000000
--- a/sbin/reboot/nextboot.sh
+++ /dev/null
@@ -1,132 +0,0 @@
-#! /bin/sh
-#
-# SPDX-License-Identifier: BSD-2-Clause
-#
-# Copyright (c) 2002 Gordon Tetlow. All rights reserved.
-# Copyright (c) 2012 Sandvine Incorporated. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-#
-# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-
-append="NO"
-delete="NO"
-kenv=
-force="NO"
-nextboot_file="/boot/nextboot.conf"
-zfs=
-
-add_kenv()
-{
-	local var value
-
-	var=$1
-	# strip literal quotes if passed in
-	value=${2%\"*}
-	value=${value#*\"}
-
-	if [ -n "${kenv}" ]; then
-		kenv="${kenv}
-"
-	fi
-	kenv="${kenv}${var}=\"${value}\""
-}
-
-display_usage() {
-	cat <<-EOF
-	Usage: nextboot [-af] [-e variable=value] [-k kernel] [-o options]
-	       nextboot -D
-	EOF
-}
-
-while getopts "aDe:fk:o:" argument ; do
-	case "${argument}" in
-	a)
-		append="YES"
-		;;
-	D)
-		delete="YES"
-		;;
-	e)
-		var=${OPTARG%%=*}
-		value=${OPTARG#*=}
-		if [ -z "$var" -o -z "$value" ]; then
-			display_usage
-			exit 1
-		fi
-		add_kenv "$var" "$value"
-		;;
-	f)
-		force="YES"
-		;;
-	k)
-		kernel="${OPTARG}"
-		add_kenv kernel "$kernel"
-		;;
-	o)
-		add_kenv kernel_options "${OPTARG}"
-		;;
-	*)
-		display_usage
-		exit 1
-		;;
-	esac
-done
-
-if [ ${delete} = "YES" ]; then
-	rm -f ${nextboot_file}
-	exit 0
-fi
-
-if [ -z "${kenv}" ]; then
-	display_usage
-	exit 1
-fi
-
-if [ -n "${kernel}" -a ${force} = "NO" -a ! -d /boot/${kernel} ]; then
-	echo "Error: /boot/${kernel} doesn't exist. Use -f to override."
-	exit 1
-fi
-
-zfs=$(df -Tn "/boot/" 2>/dev/null | while read _fs _type _other ; do
-	[ "zfs" = "${_type}" ] || continue
-	echo "${_fs%%/*}"
-done)
-
-set -e
-
-nextboot_tmp=$(mktemp $(dirname ${nextboot_file})/nextboot.XXXXXX)
-
-if [ -n "${zfs}" ]; then
-	zfsbootcfg -z ${zfs} -n freebsd:nvstore -k nextboot_enable -v YES
-	cat >> ${nextboot_tmp} << EOF
-$kenv
-EOF
-else
-cat >> ${nextboot_tmp} << EOF
-nextboot_enable="YES"
-$kenv
-EOF
-fi
-
-fsync ${nextboot_tmp}
-
-mv ${nextboot_tmp} ${nextboot_file}