1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.31 2016/11/03 15:34:31 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 67 for _patch in ${_patches}; do 68 fetch_and_verify "${_patch}" 69 trap "" 2 70 apply_patch "${_patch}" 71 trap "rm -rf ${_TMP}; exit 1" 2 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 if ! (cd / && 93 # GENERIC.MP: substitute bsd.mp->bsd and bsd.sp->bsd 94 if ${_BSDMP} && 95 tar -tzf ${_TMP}/${_patch}.tgz bsd >/dev/null 2>&1; then 96 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 97 -s '/^bsd.mp$//' -s '/^bsd$/bsd.mp/' \ 98 -s '/^bsd.sp$/bsd/' bsd.sp ${_rbfiles} 99 else 100 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 101 ${_rbfiles} 102 fi 103 ); then 104 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz 105 sp_err "Failed to create rollback for ${_patch}" 106 fi 107} 108 109fetch_and_verify() 110{ 111 # XXX privsep ala installer 112 local _patch=$1 113 [[ -n ${_patch} ]] 114 115 local _key="/etc/signify/openbsd-${_RELINT}-syspatch.pub" _p 116 117 ${_FETCH} -o "${_TMP}/SHA256.sig" "${PATCH_PATH}/SHA256.sig" 118 ${_FETCH} -mD "Applying" -o "${_TMP}/${_patch}.tgz" \ 119 "${PATCH_PATH}/${_patch}.tgz" 120 (cd ${_TMP} && 121 /usr/bin/signify -qC -p ${_key} -x SHA256.sig ${_patch}.tgz) 122} 123 124install_file() 125{ 126 # XXX handle symlinks, dir->file, file->dir? 127 local _src=$1 _dst=$2 128 [[ -f ${_src} && -f ${_dst} ]] 129 130 local _fmode _fown _fgrp 131 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 132 133 install -DFS -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} ${_dst} 134} 135 136install_kernel() 137{ 138 local _bsd=/bsd _kern=$1 139 [[ -n ${_kern} ]] 140 141 # only save the original release kernel once 142 [[ -f /bsd.rollback${_RELINT} ]] || 143 install -FSp /bsd /bsd.rollback${_RELINT} 144 145 if ${_BSDMP}; then 146 [[ ${_kern##*/} == bsd ]] && _bsd=/bsd.sp 147 fi 148 149 if [[ -n ${_bsd} ]]; then 150 install -FS ${_kern} ${_bsd} 151 fi 152} 153 154ls_installed() 155{ 156 local _p 157 for _p in ${_PDIR}/${_REL}/*; do 158 _p=${_p:##*/} 159 [[ ${_p} = rollback-syspatch-${_RELINT}-*.tgz ]] && 160 _p=${_p#rollback-} && echo ${_p%.tgz} 161 done | sort -V 162} 163 164ls_missing() 165{ 166 local _a _installed 167 _installed="$(ls_installed)" 168 169 ${_FETCH} -o "${_TMP}/index.txt" "${PATCH_PATH}/index.txt" 170 171 for _a in $(sed 's/^.* //;s/^M//;s/.tgz$//' ${_TMP}/index.txt | 172 grep "^syspatch-${_RELINT}-.*$" | sort -V); do 173 if [[ -n ${_installed} ]]; then 174 echo ${_a} | grep -qw -- "${_installed}" || echo ${_a} 175 else 176 echo ${_a} 177 fi 178 done 179} 180 181rollback_patch() 182{ 183 needs_root 184 local _explodir _file _files _patch 185 186 _patch="$(ls_installed | sort -V | tail -1)" 187 [[ -n ${_patch} ]] 188 189 echo "Reverting ${_patch}" 190 _explodir=${_TMP}/rollback-${_patch} 191 mkdir -p ${_explodir} 192 193 _files="$(tar xvzphf ${_PDIR}/${_REL}/rollback-${_patch}.tgz -C \ 194 ${_explodir})" 195 196 for _file in ${_files}; do 197 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 198 install_kernel ${_explodir}/${_file} || 199 sp_err "Failed to rollback ${_patch} (/${_file})" 200 else 201 install_file ${_explodir}/${_file} /${_file} || 202 sp_err "Failed to rollback ${_patch} (/${_file})" 203 fi 204 done 205 206 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 207 ${_PDIR}/${_REL}/${_patch#syspatch-${_RELINT}-}.patch.sig 208 209 sp_cleanup 210} 211 212sp_cleanup() 213{ 214 local _d _k 215 216 # remove non matching release /var/syspatch/ content 217 for _d in ${_PDIR}/*; do 218 [[ -e ${_d} ]] || continue 219 [[ ${_d:##*/} == ${_REL} ]] || rm -r ${_d} 220 done 221 222 # remove non matching release rollback kernel 223 for _k in /bsd.rollback*; do 224 [[ -f ${_k} ]] || continue 225 [[ ${_k} == /bsd.rollback${_RELINT} ]] || rm ${_k} 226 done 227 228 # remove rollback kernel if all kernel syspatches have been reverted 229 cmp -s /bsd /bsd.rollback${_RELINT} && rm /bsd.rollback${_RELINT} 230 231 # non-fatal: the syspatch|rollback tarball should have correct perms 232 for _m in 4.4BSD BSD.x11; do 233 mtree -qdef /etc/mtree/${_m}.dist -p / -U >/dev/null || true 234 done 235} 236 237# only run on release (not -current nor -stable) 238set -A _KERNV -- $(sysctl -n kern.version | 239 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 240[[ -z ${_KERNV[1]} ]] 241 242# check args 243[[ $@ == @(|-[[:alpha:]]) ]] || usage 244 245# XXX to be discussed; check for $ARCH? 246[[ -n ${PATCH_PATH} ]] 247[[ -d ${PATCH_PATH} ]] && PATCH_PATH="file://$(readlink -f ${PATCH_PATH})" 248[[ ${PATCH_PATH:%%://*} == @(file|ftp|http|https) ]] 249 250[[ $(sysctl -n hw.ncpufound) -gt 1 ]] && _BSDMP=true || _BSDMP=false 251_FETCH="/usr/bin/ftp -MVk ${FTP_KEEPALIVE-0}" 252_PDIR="/var/syspatch" 253_REL=${_KERNV[0]} 254_RELINT=${_REL%\.*}${_REL#*\.} 255_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 256readonly _BSDMP _FETCH _PDIR _REL _RELINT _TMP 257[[ -n ${_REL} && -n ${_RELINT} ]] 258 259trap "rm -rf ${_TMP}; exit 1" 2 3 9 13 15 ERR 260 261while getopts clr arg; do 262 case ${arg} in 263 c) ls_missing;; 264 l) ls_installed;; 265 r) rollback_patch;; 266 *) usage;; 267 esac 268done 269shift $(( OPTIND -1 )) 270[[ $# -ne 0 ]] && usage 271 272[[ ${OPTIND} != 1 ]] || apply_patches 273 274rm -rf ${_TMP} 275