1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.28 2016/11/03 12:40:08 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 # XXX handle bogus PATCH_PATH (ftp(1) interactive mode) 118 ${_FETCH} -o "${_TMP}/SHA256.sig" "${PATCH_PATH}/SHA256.sig" 119 120 # XXX see above 121 ${_FETCH} -mD "Applying" -o "${_TMP}/${_patch}.tgz" \ 122 "${PATCH_PATH}/${_patch}.tgz" 123 (cd ${_TMP} && 124 /usr/bin/signify -qC -p ${_key} -x SHA256.sig ${_patch}.tgz) 125} 126 127install_file() 128{ 129 # XXX handle sym/hardlinks? 130 # XXX handle dir becoming file and vice-versa? 131 local _src=$1 _dst=$2 132 [[ -f ${_src} && -f ${_dst} ]] 133 134 local _fmode _fown _fgrp 135 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 136 137 install -DFS -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} ${_dst} 138} 139 140install_kernel() 141{ 142 local _bsd=/bsd _kern=$1 143 [[ -n ${_kern} ]] 144 145 # only save the original release kernel once 146 [[ -f /bsd.rollback${_RELINT} ]] || 147 install -FSp /bsd /bsd.rollback${_RELINT} 148 149 if ${_BSDMP}; then 150 [[ ${_kern##*/} == bsd ]] && _bsd=/bsd.sp 151 fi 152 153 if [[ -n ${_bsd} ]]; then 154 install -FS ${_kern} ${_bsd} 155 fi 156} 157 158ls_avail() 159{ 160 # XXX see above + catch missing index.txt 161 ${_FETCH} -o - "${PATCH_PATH}/index.txt" | 162 sed 's/^.* //;s/^M//;s/.tgz$//' | 163 grep "^syspatch-${_RELINT}-.*$" | sort -V 164} 165 166ls_installed() 167{ 168 local _p 169 for _p in ${_PDIR}/${_REL}/*; do 170 _p=${_p:##*/} 171 [[ ${_p} = rollback-syspatch-${_RELINT}-*.tgz ]] && 172 _p=${_p#rollback-} && echo ${_p%.tgz} 173 done | sort -V 174} 175 176ls_missing() 177{ 178 local _a _installed 179 _installed="$(ls_installed)" 180 181 for _a in $(ls_avail); do 182 if [[ -n ${_installed} ]]; then 183 echo ${_a} | grep -qw -- "${_installed}" || echo ${_a} 184 else 185 echo ${_a} 186 fi 187 done 188} 189 190rollback_patch() 191{ 192 needs_root 193 local _explodir _file _files _patch 194 195 _patch="$(ls_installed | sort -V | tail -1)" 196 [[ -n ${_patch} ]] 197 198 echo "Reverting ${_patch}" 199 _explodir=${_TMP}/rollback-${_patch} 200 mkdir -p ${_explodir} 201 202 _files="$(tar xvzphf ${_PDIR}/${_REL}/rollback-${_patch}.tgz -C \ 203 ${_explodir})" 204 205 for _file in ${_files}; do 206 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 207 install_kernel ${_explodir}/${_file} || 208 sp_err "Failed to rollback ${_patch} (/${_file})" 209 else 210 install_file ${_explodir}/${_file} /${_file} || 211 sp_err "Failed to rollback ${_patch} (/${_file})" 212 fi 213 done 214 215 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 216 ${_PDIR}/${_REL}/${_patch#syspatch-${_RELINT}-}.patch.sig 217 218 sp_cleanup 219} 220 221sp_cleanup() 222{ 223 local _d _k 224 225 # remove non matching release /var/syspatch/ content 226 for _d in ${_PDIR}/*; do 227 [[ -e ${_d} ]] || continue 228 [[ ${_d:##*/} == ${_REL} ]] || rm -r ${_d} 229 done 230 231 # remove non matching release rollback kernel 232 for _k in /bsd.rollback*; do 233 [[ -f ${_k} ]] || continue 234 [[ ${_k} == /bsd.rollback${_RELINT} ]] || rm ${_k} 235 done 236 237 # remove rollback kernel if all kernel syspatches have been reverted 238 cmp -s /bsd /bsd.rollback${_RELINT} && rm /bsd.rollback${_RELINT} 239 240 # non-fatal: the syspatch|rollback tarball should have correct perms 241 for _m in 4.4BSD BSD.x11; do 242 mtree -qdef /etc/mtree/${_m}.dist -p / -U >/dev/null || true 243 done 244} 245 246# only run on release (not -current nor -stable) 247set -A _KERNV -- $(sysctl -n kern.version | 248 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 249[[ -z ${_KERNV[1]} ]] 250 251# check args 252[[ $@ == @(|-[[:alpha:]]) ]] || usage 253 254# XXX to be discussed; check for $ARCH? 255[[ -n ${PATCH_PATH} ]] 256[[ -d ${PATCH_PATH} ]] && PATCH_PATH="file://$(readlink -f ${PATCH_PATH})" 257 258[[ $(sysctl -n hw.ncpufound) -gt 1 ]] && _BSDMP=true || _BSDMP=false 259_FETCH="/usr/bin/ftp -MV -k ${FTP_KEEPALIVE-0}" 260_PDIR="/var/syspatch" 261_REL=${_KERNV[0]} 262_RELINT=${_REL%\.*}${_REL#*\.} 263_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 264readonly _BSDMP _FETCH _PDIR _REL _RELINT _TMP 265[[ -n ${_REL} && -n ${_RELINT} ]] 266 267trap "rm -rf ${_TMP}; exit 1" 2 3 9 13 15 ERR 268 269while getopts clr arg; do 270 case ${arg} in 271 c) ls_missing;; 272 l) ls_installed;; 273 r) rollback_patch;; 274 *) usage;; 275 esac 276done 277shift $(( OPTIND -1 )) 278[[ $# -ne 0 ]] && usage 279 280[[ ${OPTIND} != 1 ]] || apply_patches 281 282rm -rf ${_TMP} 283