1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.38 2016/11/04 15:32:13 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 checkfs ${_files} 46 47 create_rollback ${_patch} "${_files}" 48 49 for _file in ${_files}; do 50 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 51 if ! install_kernel ${_explodir}/${_file}; then 52 rollback_patch 53 sp_err "Failed to apply ${_patch} (/${_file})" 54 fi 55 else 56 if ! install_file ${_explodir}/${_file} /${_file}; then 57 rollback_patch 58 sp_err "Failed to apply ${_patch} (/${_file})" 59 fi 60 fi 61 done 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 trap "" 2 72 apply_patch "${_patch}" 73 trap "rm -rf ${_TMP}; exit 1" 2 74 done 75 76 sp_cleanup 77} 78 79checkfs() 80{ 81 # XXX make sure we have enough space? 82 local _files="${@}" 83 [[ -n ${_files} ]] 84 85 local _d _f 86 87 for _d in $(stat -qf "%Sd" $(for _f in ${_files}; do echo /${_f%/*} 88 done | uniq)); do mount | grep -q "^/dev/${_d} .*read-only" && 89 sp_err "Remote or read-only filesystem, aborting" 90 done 91} 92 93create_rollback() 94{ 95 local _file _patch=$1 _rbfiles 96 [[ -n ${_patch} ]] 97 shift 98 local _files="${@}" 99 [[ -n ${_files} ]] 100 101 [[ -d ${_PDIR}/${_REL} ]] || install -d ${_PDIR}/${_REL} 102 103 for _file in ${_files}; do 104 [[ -f /${_file} ]] || continue 105 _rbfiles="${_rbfiles} ${_file}" 106 done 107 108 if ! (cd / && 109 # GENERIC.MP: substitute bsd.mp->bsd and bsd.sp->bsd 110 if ${_BSDMP} && 111 tar -tzf ${_TMP}/${_patch}.tgz bsd >/dev/null 2>&1; then 112 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 113 -s '/^bsd.mp$//' -s '/^bsd$/bsd.mp/' \ 114 -s '/^bsd.sp$/bsd/' bsd.sp ${_rbfiles} 115 else 116 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 117 ${_rbfiles} 118 fi 119 ); then 120 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz 121 sp_err "Failed to create rollback for ${_patch}" 122 fi 123} 124 125fetch_and_verify() 126{ 127 # XXX privsep ala installer 128 local _patch=$1 129 [[ -n ${_patch} ]] 130 131 local _key="/etc/signify/openbsd-${_RELINT}-syspatch.pub" _p 132 133 ${_FETCH} -o "${_TMP}/SHA256.sig" "${PATCH_PATH}/SHA256.sig" 134 ${_FETCH} -mD "Applying" -o "${_TMP}/${_patch}.tgz" \ 135 "${PATCH_PATH}/${_patch}.tgz" 136 (cd ${_TMP} && 137 /usr/bin/signify -qC -p ${_key} -x SHA256.sig ${_patch}.tgz) 138} 139 140install_file() 141{ 142 # XXX handle symlinks, dir->file, file->dir? 143 local _src=$1 _dst=$2 144 [[ -f ${_src} && -f ${_dst} ]] 145 146 local _fmode _fown _fgrp 147 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 148 149 install -DFS -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} ${_dst} 150} 151 152install_kernel() 153{ 154 local _bsd=/bsd _kern=$1 155 [[ -n ${_kern} ]] 156 157 # only save the original release kernel once 158 [[ -f /bsd.rollback${_RELINT} ]] || 159 install -FSp /bsd /bsd.rollback${_RELINT} 160 161 if ${_BSDMP}; then 162 [[ ${_kern##*/} == bsd ]] && _bsd=/bsd.sp 163 fi 164 165 if [[ -n ${_bsd} ]]; then 166 install -FS ${_kern} ${_bsd} 167 fi 168} 169 170ls_installed() 171{ 172 local _p 173 for _p in ${_PDIR}/${_REL}/*; do 174 _p=${_p:##*/} 175 [[ ${_p} = rollback-syspatch-${_RELINT}-*.tgz ]] && 176 _p=${_p#rollback-} && echo ${_p%.tgz} 177 done | sort -V 178} 179 180ls_missing() 181{ 182 # XXX match with installed sets (comp, x...)? 183 local _a _installed 184 _installed="$(ls_installed)" 185 186 ${_FETCH} -o "${_TMP}/index.txt" "${PATCH_PATH}/index.txt" 187 188 for _a in $(sed 's/^.* //;s/^M//;s/.tgz$//' ${_TMP}/index.txt | 189 grep "^syspatch-${_RELINT}-.*$" | sort -V); do 190 if [[ -n ${_installed} ]]; then 191 echo ${_a} | grep -qw -- "${_installed}" || echo ${_a} 192 else 193 echo ${_a} 194 fi 195 done 196} 197 198rollback_patch() 199{ 200 needs_root 201 local _explodir _file _files _patch 202 203 _patch="$(ls_installed | sort -V | tail -1)" 204 [[ -n ${_patch} ]] 205 206 echo "Reverting ${_patch}" 207 _explodir=${_TMP}/rollback-${_patch} 208 mkdir -p ${_explodir} 209 210 _files="$(tar xvzphf ${_PDIR}/${_REL}/rollback-${_patch}.tgz -C \ 211 ${_explodir})" 212 checkfs ${_files} 213 214 for _file in ${_files}; do 215 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 216 install_kernel ${_explodir}/${_file} || 217 sp_err "Failed to revert ${_patch} (/${_file})" 218 else 219 install_file ${_explodir}/${_file} /${_file} || 220 sp_err "Failed to revert ${_patch} (/${_file})" 221 fi 222 done 223 224 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 225 ${_PDIR}/${_REL}/${_patch#syspatch-${_RELINT}-}.patch.sig 226 227 sp_cleanup 228} 229 230sp_cleanup() 231{ 232 local _d _k _m 233 234 # remove non matching release /var/syspatch/ content 235 for _d in ${_PDIR}/*; do 236 [[ -e ${_d} ]] || continue 237 [[ ${_d:##*/} == ${_REL} ]] || rm -r ${_d} 238 done 239 240 # remove non matching release rollback kernel 241 for _k in /bsd.rollback*; do 242 [[ -f ${_k} ]] || continue 243 [[ ${_k} == /bsd.rollback${_RELINT} ]] || rm ${_k} 244 done 245 246 # remove rollback kernel if all kernel syspatches have been reverted 247 cmp -s /bsd /bsd.rollback${_RELINT} && rm /bsd.rollback${_RELINT} 248 249 # non-fatal: the syspatch|rollback tarball should have correct perms 250 for _m in 4.4BSD BSD.x11; do 251 mtree -qdef /etc/mtree/${_m}.dist -p / -U >/dev/null || true 252 done 253} 254 255# only run on release (not -current nor -stable) 256set -A _KERNV -- $(sysctl -n kern.version | 257 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 258[[ -z ${_KERNV[1]} ]] 259 260# check args 261[[ $@ == @(|-[[:alpha:]]) ]] || usage 262 263# XXX to be discussed; check for $ARCH? 264[[ -n ${PATCH_PATH} ]] 265[[ -d ${PATCH_PATH} ]] && PATCH_PATH="file://$(readlink -f ${PATCH_PATH})" 266[[ ${PATCH_PATH:%%://*} == @(file|ftp|http|https) ]] 267 268[[ $(sysctl -n hw.ncpufound) -gt 1 ]] && _BSDMP=true || _BSDMP=false 269_FETCH="/usr/bin/ftp -MVk ${FTP_KEEPALIVE-0}" 270_PDIR="/var/syspatch" 271_REL=${_KERNV[0]} 272_RELINT=${_REL%\.*}${_REL#*\.} 273_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 274readonly _BSDMP _FETCH _PDIR _REL _RELINT _TMP 275[[ -n ${_REL} && -n ${_RELINT} ]] 276 277trap "rm -rf ${_TMP}; exit 1" 2 3 9 13 15 ERR 278 279while getopts clr arg; do 280 case ${arg} in 281 c) ls_missing;; 282 l) ls_installed;; 283 r) rollback_patch;; 284 *) usage;; 285 esac 286done 287shift $(( OPTIND -1 )) 288[[ $# -ne 0 ]] && usage 289 290[[ ${OPTIND} != 1 ]] || apply_patches 291 292rm -rf ${_TMP} 293