1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.20 2016/11/01 15:51:04 ajacoutot Exp $ 4# 5# Copyright (c) 2016 Antoine Jacoutot <ajacoutot@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 -e 20 21sp_err() 22{ 23 echo "${@}" 1>&2 && return 1 24} 25 26usage() 27{ 28 sp_err "usage: ${0##*/} [-c | -l | -r]" 29} 30 31needs_root() 32{ 33 [[ $(id -u) -ne 0 ]] && sp_err "${0##*/}: need root privileges" 34} 35 36apply_patch() 37{ 38 local _explodir _file _files _patch=$1 39 [[ -n ${_patch} ]] 40 41 local _explodir=${_TMP}/${_patch} 42 mkdir -p ${_explodir} 43 44 _files="$(tar xvzphf ${_TMP}/${_patch}.tgz -C ${_explodir})" 45 create_rollback ${_patch} "${_files}" 46 47 for _file in ${_files}; do 48 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 49 if ! install_kernel ${_explodir}/${_file}; then 50 rollback_patch 51 sp_err "Failed to apply ${_patch} (/${_file})" 52 fi 53 else 54 if ! install_file ${_explodir}/${_file} /${_file}; then 55 rollback_patch 56 sp_err "Failed to apply ${_patch} (/${_file})" 57 fi 58 fi 59 done 60} 61 62apply_patches() 63{ 64 needs_root 65 local _m _patch _patches="$(ls_missing)" 66 [[ -n ${_patches} ]] || return 0 # nothing to do 67 68 for _patch in ${_patches}; do 69 fetch_and_verify "${_patch}" 70 apply_patch "${_patch}" 71 done 72 73 # non-fatal: the syspatch tarball should have correct permissions 74 for _m in 4.4BSD BSD.x11; do 75 mtree -qdef /etc/mtree/${_m}.dist -p / -U >/dev/null || true 76 done 77} 78 79create_rollback() 80{ 81 local _file _patch=$1 _rbfiles 82 [[ -n ${_patch} ]] 83 shift 84 local _files="${@}" 85 [[ -n ${_files} ]] 86 87 [[ -d ${_PDIR}/${_REL} ]] || install -d ${_PDIR}/${_REL} 88 89 for _file in ${_files}; do 90 [[ -f /${_file} ]] || continue 91 _rbfiles="${_rbfiles} ${_file}" 92 done 93 94 if ! (cd / && 95 # GENERIC.MP: substitute bsd.mp->bsd and bsd.sp->bsd 96 if ${_BSDMP} && 97 tar -tzf ${_TMP}/${_patch}.tgz bsd >/dev/null 2>&1; then 98 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 99 -s '/^bsd.mp$//' -s '/^bsd$/bsd.mp/' \ 100 -s '/^bsd.sp$/bsd/' bsd.sp ${_rbfiles} 101 else 102 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 103 ${_rbfiles} 104 fi 105 ); then 106 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz 107 sp_err "Failed to create rollback for ${_patch}" 108 fi 109} 110 111fetch_and_verify() 112{ 113 # XXX privsep ala installer 114 local _patch=$1 115 [[ -n ${_patch} ]] 116 117 local _key="/etc/signify/openbsd-${_RELINT}-syspatch.pub" _p 118 119 # XXX handle bogus PATCH_PATH (ftp(1) interactive mode) 120 ${_FETCH} -o "${_TMP}/SHA256.sig" "${PATCH_PATH}/SHA256.sig" 121 122 # XXX see above 123 ${_FETCH} -mD "Applying" -o "${_TMP}/${_patch}.tgz" \ 124 "${PATCH_PATH}/${_patch}.tgz" 125 (cd ${_TMP} && 126 /usr/bin/signify -qC -p ${_key} -x SHA256.sig ${_patch}.tgz) 127} 128 129install_file() 130{ 131 # XXX handle sym/hardlinks? 132 # XXX handle dir becoming file and vice-versa? 133 local _src=$1 _dst=$2 134 [[ -f ${_src} && -f ${_dst} ]] 135 136 local _fmode _fown _fgrp 137 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 138 139 install -DFS -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} ${_dst} 140} 141 142install_kernel() 143{ 144 local _bsd=/bsd _kern=$1 145 [[ -n ${_kern} ]] 146 147 # only save the original release kernel once 148 [[ -f /bsd.rollback${_RELINT} ]] || 149 install -FSp /bsd /bsd.rollback${_RELINT} 150 151 if ${_BSDMP}; then 152 [[ ${_kern##*/} == bsd ]] && _bsd=/bsd.sp 153 fi 154 155 if [[ -n ${_bsd} ]]; then 156 install -FS ${_kern} ${_bsd} 157 fi 158} 159 160ls_avail() 161{ 162 ${_FETCH} -o - "${PATCH_PATH}/index.txt" | 163 sed 's/^.* //;s/^M//;s/.tgz$//' | 164 grep "^syspatch-${_RELINT}-.*$" | sort -V 165} 166 167ls_installed() 168{ 169 local _p 170 # no _REL dir = no installed patch 171 cd ${_PDIR}/${_REL} 2>/dev/null && set -- * || return 0 172 for _p; do 173 [[ ${_p} = rollback-syspatch-${_RELINT}-*.tgz ]] && 174 _p=${_p#rollback-} && echo ${_p%.tgz} 175 done | sort -V 176} 177 178ls_missing() 179{ 180 local _a _installed 181 _installed="$(ls_installed)" 182 183 for _a in $(ls_avail); do 184 if [[ -n ${_installed} ]]; then 185 echo ${_a} | grep -qw -- "${_installed}" || echo ${_a} 186 else 187 echo ${_a} 188 fi 189 done 190} 191 192sp_cleanup() 193{ 194 local _d 195 196 # remove non matching release /var/syspatch/ content 197 cd ${_PDIR} && set -- * 198 for _d; do 199 [[ -e ${_d} ]] || continue 200 [[ ${_d} == ${_REL} ]] || rm -r ${_d} 201 done 202 203 # remove rollback kernel if all kernel syspatches have been reverted 204 cmp -s /bsd /bsd.rollback${_RELINT} && rm /bsd.rollback${_RELINT} 205} 206 207rollback_patch() 208{ 209 needs_root 210 local _explodir _file _files _patch 211 212 _patch="$(ls_installed | sort -V | tail -1)" 213 [[ -n ${_patch} ]] 214 215 _explodir=${_TMP}/rollback-${_patch} 216 mkdir -p ${_explodir} 217 218 _files="$(tar xvzphf ${_PDIR}/${_REL}/rollback-${_patch}.tgz -C \ 219 ${_explodir})" 220 221 for _file in ${_files}; do 222 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 223 install_kernel ${_explodir}/${_file} || 224 sp_err "Failed to rollback ${_patch} (/${_file})" 225 else 226 install_file ${_explodir}/${_file} /${_file} || 227 sp_err "Failed to rollback ${_patch} (/${_file})" 228 fi 229 done 230 231 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 232 ${_PDIR}/${_REL}/${_patch#syspatch-${_RELINT}-}.patch.sig 233} 234 235# only run on release (not -current nor -stable) 236set -A _KERNV -- $(sysctl -n kern.version | 237 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 238[[ -z ${_KERNV[1]} ]] 239 240# check args 241[[ $@ == @(|-[[:alpha:]]) ]] || usage 242 243# XXX to be discussed 244[[ -n ${PATCH_PATH} ]] 245[[ -d ${PATCH_PATH} ]] && PATCH_PATH="file://$(readlink -f ${PATCH_PATH})" 246 247# XXX hw.ncpufound ? 248[[ $(sysctl -n hw.ncpu) -gt 1 ]] && _BSDMP=true || _BSDMP=false 249_FETCH="/usr/bin/ftp -MV -k ${FTP_KEEPALIVE-0}" 250_PDIR="/var/syspatch" 251_REL=${_KERNV[0]} 252_RELINT=${_REL%\.*}${_REL#*\.} 253_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 254readonly _BSDMP _FETCH _PDIR _REL _RELINT _TMP 255[[ -n ${_REL} && -n ${_RELINT} ]] 256 257trap "rm -rf ${_TMP}; exit 1" 2 3 9 13 15 ERR 258 259while getopts clr arg; do 260 case ${arg} in 261 c) ls_missing;; 262 l) ls_installed;; 263 r) rollback_patch;; 264 *) usage;; 265 esac 266done 267shift $(( OPTIND -1 )) 268[[ $# -ne 0 ]] && usage 269 270[[ ${OPTIND} != 1 ]] || apply_patches 271 272sp_cleanup 273rm -rf ${_TMP} 274