1#!/bin/ksh
2#
3# $OpenBSD: reorder_kernel.sh,v 1.13 2022/11/07 15:55:56 kn Exp $
4#
5# Copyright (c) 2017 Robert Peichaer <rpe@openbsd.org>
6#
7# Permission to use, copy, modify, and distribute this software for any
8# purpose with or without fee is hereby granted, provided that the above
9# copyright notice and this permission notice appear in all copies.
10#
11# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18
19set -o errexit
20
21export PATH=/usr/bin:/bin:/usr/sbin:/sbin
22
23KERNEL=$(sysctl -n kern.osversion)
24KERNEL=${KERNEL%#*}
25KERNEL_DIR=/usr/share/relink/kernel
26LOGFILE=$KERNEL_DIR/$KERNEL/relink.log
27PROGNAME=${0##*/}
28SHA256=/var/db/kernel.SHA256
29
30# Silently skip if on a NFS mounted filesystem.
31df -t nonfs $KERNEL_DIR >/dev/null 2>&1
32
33# Install trap handlers to inform about success or failure via syslog.
34ERRMSG='failed'
35trap 'trap - EXIT; logger -st $PROGNAME "$ERRMSG" >/dev/console 2>&1' ERR
36trap 'logger -t $PROGNAME "kernel relinking done"' EXIT
37
38# Create kernel compile dir and redirect stdout/stderr to a logfile.
39mkdir -m 700 -p $KERNEL_DIR/$KERNEL
40exec 1>$LOGFILE
41exec 2>&1
42
43ERRMSG="failed -- see $LOGFILE"
44
45if [[ -f $KERNEL_DIR.tgz ]]; then
46	rm -rf $KERNEL_DIR/$KERNEL/*
47	# The directory containing the logfile was just deleted, redirect
48	# stdout/stderr again to a new logfile.
49	exec 1>$LOGFILE
50	exec 2>&1
51	tar -C $KERNEL_DIR -xzf $KERNEL_DIR.tgz $KERNEL
52	rm -f $KERNEL_DIR.tgz
53fi
54
55if ! sha256 -C $SHA256 /bsd; then
56	cat <<__EOF
57
58Failed to verify /bsd's checksum, therefore a randomly linked kernel (KARL)
59is not being built. KARL can be re-enabled for next boot by issuing as root:
60
61sha256 -h $SHA256 /bsd
62__EOF
63	# Trigger ERR trap
64	false
65fi
66
67cd $KERNEL_DIR/$KERNEL
68make newbsd
69[ -f /etc/bsd.re-config ] && config -e -c /etc/bsd.re-config -f bsd
70make newinstall
71sync
72
73echo "\nKernel has been relinked and is active on next reboot.\n"
74cat $SHA256
75