1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.22 2016/11/01 16:21:47 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 apply_patch "${_patch}" 70 done 71 72 sp_cleanup 73} 74 75create_rollback() 76{ 77 local _file _patch=$1 _rbfiles 78 [[ -n ${_patch} ]] 79 shift 80 local _files="${@}" 81 [[ -n ${_files} ]] 82 83 [[ -d ${_PDIR}/${_REL} ]] || install -d ${_PDIR}/${_REL} 84 85 for _file in ${_files}; do 86 [[ -f /${_file} ]] || continue 87 _rbfiles="${_rbfiles} ${_file}" 88 done 89 90 if ! (cd / && 91 # GENERIC.MP: substitute bsd.mp->bsd and bsd.sp->bsd 92 if ${_BSDMP} && 93 tar -tzf ${_TMP}/${_patch}.tgz bsd >/dev/null 2>&1; then 94 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 95 -s '/^bsd.mp$//' -s '/^bsd$/bsd.mp/' \ 96 -s '/^bsd.sp$/bsd/' bsd.sp ${_rbfiles} 97 else 98 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 99 ${_rbfiles} 100 fi 101 ); then 102 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz 103 sp_err "Failed to create rollback for ${_patch}" 104 fi 105} 106 107fetch_and_verify() 108{ 109 # XXX privsep ala installer 110 local _patch=$1 111 [[ -n ${_patch} ]] 112 113 local _key="/etc/signify/openbsd-${_RELINT}-syspatch.pub" _p 114 115 # XXX handle bogus PATCH_PATH (ftp(1) interactive mode) 116 ${_FETCH} -o "${_TMP}/SHA256.sig" "${PATCH_PATH}/SHA256.sig" 117 118 # XXX see above 119 ${_FETCH} -mD "Applying" -o "${_TMP}/${_patch}.tgz" \ 120 "${PATCH_PATH}/${_patch}.tgz" 121 (cd ${_TMP} && 122 /usr/bin/signify -qC -p ${_key} -x SHA256.sig ${_patch}.tgz) 123} 124 125install_file() 126{ 127 # XXX handle sym/hardlinks? 128 # XXX handle dir becoming file and vice-versa? 129 local _src=$1 _dst=$2 130 [[ -f ${_src} && -f ${_dst} ]] 131 132 local _fmode _fown _fgrp 133 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 134 135 install -DFS -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} ${_dst} 136} 137 138install_kernel() 139{ 140 local _bsd=/bsd _kern=$1 141 [[ -n ${_kern} ]] 142 143 # only save the original release kernel once 144 [[ -f /bsd.rollback${_RELINT} ]] || 145 install -FSp /bsd /bsd.rollback${_RELINT} 146 147 if ${_BSDMP}; then 148 [[ ${_kern##*/} == bsd ]] && _bsd=/bsd.sp 149 fi 150 151 if [[ -n ${_bsd} ]]; then 152 install -FS ${_kern} ${_bsd} 153 fi 154} 155 156ls_avail() 157{ 158 ${_FETCH} -o - "${PATCH_PATH}/index.txt" | 159 sed 's/^.* //;s/^M//;s/.tgz$//' | 160 grep "^syspatch-${_RELINT}-.*$" | sort -V 161} 162 163ls_installed() 164{ 165 local _p 166 # no _REL dir = no installed patch 167 cd ${_PDIR}/${_REL} 2>/dev/null && set -- * || return 0 168 for _p; do 169 [[ ${_p} = rollback-syspatch-${_RELINT}-*.tgz ]] && 170 _p=${_p#rollback-} && echo ${_p%.tgz} 171 done | sort -V 172} 173 174ls_missing() 175{ 176 local _a _installed 177 _installed="$(ls_installed)" 178 179 for _a in $(ls_avail); do 180 if [[ -n ${_installed} ]]; then 181 echo ${_a} | grep -qw -- "${_installed}" || echo ${_a} 182 else 183 echo ${_a} 184 fi 185 done 186} 187 188sp_cleanup() 189{ 190 local _d _k 191 192 # remove non matching release /var/syspatch/ content 193 cd ${_PDIR} && set -- * 194 for _d; do 195 [[ -e ${_d} ]] || continue 196 [[ ${_d} == ${_REL} ]] || rm -r ${_d} 197 done 198 199 # remove non matching release rollback kernel 200 set -- /bsd.rollback* 201 for _k; do 202 [[ -f ${_k} ]] || continue 203 [[ ${_k} == /bsd.rollback${_RELINT} ]] || rm ${_k} 204 done 205 206 # remove rollback kernel if all kernel syspatches have been reverted 207 cmp -s /bsd /bsd.rollback${_RELINT} && rm /bsd.rollback${_RELINT} 208 209 # non-fatal: the syspatch|rollback tarball should have correct perms 210 for _m in 4.4BSD BSD.x11; do 211 mtree -qdef /etc/mtree/${_m}.dist -p / -U >/dev/null || true 212 done 213} 214 215rollback_patch() 216{ 217 needs_root 218 local _explodir _file _files _patch 219 220 _patch="$(ls_installed | sort -V | tail -1)" 221 [[ -n ${_patch} ]] 222 223 _explodir=${_TMP}/rollback-${_patch} 224 mkdir -p ${_explodir} 225 226 _files="$(tar xvzphf ${_PDIR}/${_REL}/rollback-${_patch}.tgz -C \ 227 ${_explodir})" 228 229 for _file in ${_files}; do 230 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 231 install_kernel ${_explodir}/${_file} || 232 sp_err "Failed to rollback ${_patch} (/${_file})" 233 else 234 install_file ${_explodir}/${_file} /${_file} || 235 sp_err "Failed to rollback ${_patch} (/${_file})" 236 fi 237 done 238 239 sp_cleanup 240 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 241 ${_PDIR}/${_REL}/${_patch#syspatch-${_RELINT}-}.patch.sig 242} 243 244# only run on release (not -current nor -stable) 245set -A _KERNV -- $(sysctl -n kern.version | 246 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 247[[ -z ${_KERNV[1]} ]] 248 249# check args 250[[ $@ == @(|-[[:alpha:]]) ]] || usage 251 252# XXX to be discussed 253[[ -n ${PATCH_PATH} ]] 254[[ -d ${PATCH_PATH} ]] && PATCH_PATH="file://$(readlink -f ${PATCH_PATH})" 255 256# XXX hw.ncpufound ? 257[[ $(sysctl -n hw.ncpu) -gt 1 ]] && _BSDMP=true || _BSDMP=false 258_FETCH="/usr/bin/ftp -MV -k ${FTP_KEEPALIVE-0}" 259_PDIR="/var/syspatch" 260_REL=${_KERNV[0]} 261_RELINT=${_REL%\.*}${_REL#*\.} 262_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 263readonly _BSDMP _FETCH _PDIR _REL _RELINT _TMP 264[[ -n ${_REL} && -n ${_RELINT} ]] 265 266trap "rm -rf ${_TMP}; exit 1" 2 3 9 13 15 ERR 267 268while getopts clr arg; do 269 case ${arg} in 270 c) ls_missing;; 271 l) ls_installed;; 272 r) rollback_patch;; 273 *) usage;; 274 esac 275done 276shift $(( OPTIND -1 )) 277[[ $# -ne 0 ]] && usage 278 279[[ ${OPTIND} != 1 ]] || apply_patches 280 281rm -rf ${_TMP} 282