1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.24 2016/11/01 20:46:02 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 trap "" 2 48 for _file in ${_files}; do 49 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 50 if ! install_kernel ${_explodir}/${_file}; then 51 rollback_patch 52 sp_err "Failed to apply ${_patch} (/${_file})" 53 fi 54 else 55 if ! install_file ${_explodir}/${_file} /${_file}; then 56 rollback_patch 57 sp_err "Failed to apply ${_patch} (/${_file})" 58 fi 59 fi 60 done 61 trap - 2 62} 63 64apply_patches() 65{ 66 needs_root 67 local _m _patch _patches="$(ls_missing)" 68 69 for _patch in ${_patches}; do 70 fetch_and_verify "${_patch}" 71 apply_patch "${_patch}" 72 done 73 74 sp_cleanup 75} 76 77create_rollback() 78{ 79 local _file _patch=$1 _rbfiles 80 [[ -n ${_patch} ]] 81 shift 82 local _files="${@}" 83 [[ -n ${_files} ]] 84 85 [[ -d ${_PDIR}/${_REL} ]] || install -d ${_PDIR}/${_REL} 86 87 for _file in ${_files}; do 88 [[ -f /${_file} ]] || continue 89 _rbfiles="${_rbfiles} ${_file}" 90 done 91 92 trap "" 2 93 if ! (cd / && 94 # GENERIC.MP: substitute bsd.mp->bsd and bsd.sp->bsd 95 if ${_BSDMP} && 96 tar -tzf ${_TMP}/${_patch}.tgz bsd >/dev/null 2>&1; then 97 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 98 -s '/^bsd.mp$//' -s '/^bsd$/bsd.mp/' \ 99 -s '/^bsd.sp$/bsd/' bsd.sp ${_rbfiles} 100 else 101 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 102 ${_rbfiles} 103 fi 104 ); then 105 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz 106 sp_err "Failed to create rollback for ${_patch}" 107 fi 108 trap - 2 109} 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 # XXX see above + catch missing index.txt 163 ${_FETCH} -o - "${PATCH_PATH}/index.txt" | 164 sed 's/^.* //;s/^M//;s/.tgz$//' | 165 grep "^syspatch-${_RELINT}-.*$" | sort -V 166} 167 168ls_installed() 169{ 170 local _p 171 # no _REL dir = no installed patch 172 cd ${_PDIR}/${_REL} 2>/dev/null && set -- * || return 0 173 for _p; do 174 [[ ${_p} = rollback-syspatch-${_RELINT}-*.tgz ]] && 175 _p=${_p#rollback-} && echo ${_p%.tgz} 176 done | sort -V 177} 178 179ls_missing() 180{ 181 local _a _installed 182 _installed="$(ls_installed)" 183 184 for _a in $(ls_avail); do 185 if [[ -n ${_installed} ]]; then 186 echo ${_a} | grep -qw -- "${_installed}" || echo ${_a} 187 else 188 echo ${_a} 189 fi 190 done 191} 192 193rollback_patch() 194{ 195 needs_root 196 local _explodir _file _files _patch 197 198 _patch="$(ls_installed | sort -V | tail -1)" 199 [[ -n ${_patch} ]] 200 201 _explodir=${_TMP}/rollback-${_patch} 202 mkdir -p ${_explodir} 203 204 _files="$(tar xvzphf ${_PDIR}/${_REL}/rollback-${_patch}.tgz -C \ 205 ${_explodir})" 206 207 trap "" 2 208 for _file in ${_files}; do 209 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 210 install_kernel ${_explodir}/${_file} || 211 sp_err "Failed to rollback ${_patch} (/${_file})" 212 else 213 install_file ${_explodir}/${_file} /${_file} || 214 sp_err "Failed to rollback ${_patch} (/${_file})" 215 fi 216 done 217 218 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 219 ${_PDIR}/${_REL}/${_patch#syspatch-${_RELINT}-}.patch.sig 220 trap - 2 221 222 sp_cleanup 223} 224 225sp_cleanup() 226{ 227 local _d _k 228 229 # remove non matching release /var/syspatch/ content 230 cd ${_PDIR} && set -- * 231 for _d; do 232 [[ -e ${_d} ]] || continue 233 [[ ${_d} == ${_REL} ]] || rm -r ${_d} 234 done 235 236 # remove non matching release rollback kernel 237 set -- /bsd.rollback* 238 for _k; do 239 [[ -f ${_k} ]] || continue 240 [[ ${_k} == /bsd.rollback${_RELINT} ]] || rm ${_k} 241 done 242 243 # remove rollback kernel if all kernel syspatches have been reverted 244 cmp -s /bsd /bsd.rollback${_RELINT} && rm /bsd.rollback${_RELINT} 245 246 # non-fatal: the syspatch|rollback tarball should have correct perms 247 for _m in 4.4BSD BSD.x11; do 248 mtree -qdef /etc/mtree/${_m}.dist -p / -U >/dev/null || true 249 done 250} 251 252# only run on release (not -current nor -stable) 253set -A _KERNV -- $(sysctl -n kern.version | 254 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 255[[ -z ${_KERNV[1]} ]] 256 257# check args 258[[ $@ == @(|-[[:alpha:]]) ]] || usage 259 260# XXX to be discussed; check for $ARCH? 261[[ -n ${PATCH_PATH} ]] 262[[ -d ${PATCH_PATH} ]] && PATCH_PATH="file://$(readlink -f ${PATCH_PATH})" 263 264# XXX hw.ncpufound ? 265[[ $(sysctl -n hw.ncpu) -gt 1 ]] && _BSDMP=true || _BSDMP=false 266_FETCH="/usr/bin/ftp -MV -k ${FTP_KEEPALIVE-0}" 267_PDIR="/var/syspatch" 268_REL=${_KERNV[0]} 269_RELINT=${_REL%\.*}${_REL#*\.} 270_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 271readonly _BSDMP _FETCH _PDIR _REL _RELINT _TMP 272[[ -n ${_REL} && -n ${_RELINT} ]] 273 274trap "rm -rf ${_TMP}; exit 1" 3 9 13 15 ERR 275 276while getopts clr arg; do 277 case ${arg} in 278 c) ls_missing;; 279 l) ls_installed;; 280 r) rollback_patch;; 281 *) usage;; 282 esac 283done 284shift $(( OPTIND -1 )) 285[[ $# -ne 0 ]] && usage 286 287[[ ${OPTIND} != 1 ]] || apply_patches 288 289rm -rf ${_TMP} 290