1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.41 2016/11/08 12:11:22 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 ${_patch} ]] 40 41 _explodir=${_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 _patch 68 69 for _patch in $(ls_missing); do 70 fetch_and_verify "${_patch}" 71 trap '' INT 72 apply_patch "${_patch}" 73 trap exit INT 74 done 75 76 sp_cleanup 77} 78 79checkfs() 80{ 81 local _d _f _files="${@}" 82 [[ -n ${_files} ]] 83 84 for _d in $(stat -qf "%Sd" $(for _f in ${_files}; do echo /${_f%/*} 85 done | uniq)); do mount | grep -q "^/dev/${_d} .*read-only" && 86 sp_err "Remote or read-only filesystem, aborting" 87 done 88} 89 90create_rollback() 91{ 92 local _file _patch=$1 _rbfiles 93 [[ -n ${_patch} ]] 94 shift 95 local _files="${@}" 96 [[ -n ${_files} ]] 97 98 [[ -d ${_PDIR}/${_REL} ]] || install -d ${_PDIR}/${_REL} 99 100 for _file in ${_files}; do 101 [[ -f /${_file} ]] || continue 102 _rbfiles="${_rbfiles} ${_file}" 103 done 104 105 if ! (cd / && 106 # GENERIC.MP: substitute bsd.mp->bsd and bsd.sp->bsd 107 if ${_BSDMP} && 108 tar -tzf ${_TMP}/${_patch}.tgz bsd >/dev/null 2>&1; then 109 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 110 -s '/^bsd.mp$//' -s '/^bsd$/bsd.mp/' \ 111 -s '/^bsd.sp$/bsd/' bsd.sp ${_rbfiles} 112 else 113 tar -czf ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 114 ${_rbfiles} 115 fi 116 ); then 117 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz 118 sp_err "Failed to create rollback for ${_patch}" 119 fi 120} 121 122fetch_and_verify() 123{ 124 # XXX privsep ala installer (doas|su)? 125 local _patch=$1 126 [[ -n ${_patch} ]] 127 128 ${_FETCH} -o "${_TMP}/SHA256.sig" "${PATCH_PATH}/SHA256.sig" 129 ${_FETCH} -mD "Applying" -o "${_TMP}/${_patch}.tgz" \ 130 "${PATCH_PATH}/${_patch}.tgz" 131 (cd ${_TMP} && /usr/bin/signify -qC -p \ 132 /etc/signify/openbsd-${_RELINT}-syspatch.pub -x SHA256.sig \ 133 ${_patch}.tgz) 134} 135 136install_file() 137{ 138 # XXX handle symlinks, dir->file, file->dir? 139 local _dst=$2 _fgrp _fmode _fown _src=$1 140 [[ -f ${_src} && -f ${_dst} ]] 141 142 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 143 144 install -DFS -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} ${_dst} 145} 146 147install_kernel() 148{ 149 local _bsd=/bsd _kern=$1 150 [[ -n ${_kern} ]] 151 152 # only save the original release kernel once 153 [[ -f /bsd.rollback${_RELINT} ]] || 154 install -FSp /bsd /bsd.rollback${_RELINT} 155 156 if ${_BSDMP}; then 157 [[ ${_kern##*/} == bsd ]] && _bsd=/bsd.sp 158 fi 159 160 if [[ -n ${_bsd} ]]; then 161 install -FS ${_kern} ${_bsd} 162 fi 163} 164 165ls_installed() 166{ 167 local _p 168 for _p in ${_PDIR}/${_REL}/*; do 169 _p=${_p:##*/} 170 [[ ${_p} == rollback-syspatch-${_RELINT}-*.tgz ]] && 171 _p=${_p#rollback-} && echo ${_p%.tgz} 172 done | sort -V 173} 174 175ls_missing() 176{ 177 # XXX match with installed sets (comp, x...)? 178 local _a _installed 179 _installed="$(ls_installed)" 180 181 ${_FETCH} -o "${_TMP}/index.txt" "${PATCH_PATH}/index.txt" 182 183 for _a in $(sed 's/^.* //;s/^M//;s/.tgz$//' ${_TMP}/index.txt | 184 grep "^syspatch-${_RELINT}-.*$" | sort -V); 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} 202 203 echo "Reverting ${_patch}" 204 mkdir -p ${_explodir} 205 206 _files="$(tar xvzphf ${_PDIR}/${_REL}/rollback-${_patch}.tgz -C \ 207 ${_explodir})" 208 checkfs ${_files} 209 210 for _file in ${_files}; do 211 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 212 install_kernel ${_explodir}/${_file} || 213 sp_err "Failed to revert ${_patch} (/${_file})" 214 else 215 install_file ${_explodir}/${_file} /${_file} || 216 sp_err "Failed to revert ${_patch} (/${_file})" 217 fi 218 done 219 220 rm ${_PDIR}/${_REL}/rollback-${_patch}.tgz \ 221 ${_PDIR}/${_REL}/${_patch#syspatch-${_RELINT}-}.patch.sig 222 223 sp_cleanup 224} 225 226sp_cleanup() 227{ 228 local _d _k _m 229 230 # remove non matching release /var/syspatch/ content 231 for _d in ${_PDIR}/*; do 232 [[ -e ${_d} ]] || continue 233 [[ ${_d:##*/} == ${_REL} ]] || rm -r ${_d} 234 done 235 236 # remove non matching release rollback kernel 237 for _k in /bsd.rollback*; do 238 [[ -f ${_k} ]] || continue 239 [[ ${_k} == /bsd.rollback${_RELINT} ]] || rm ${_k} 240 done 241 242 # remove rollback kernel if all kernel syspatches have been reverted 243 cmp -s /bsd /bsd.rollback${_RELINT} && rm /bsd.rollback${_RELINT} 244 245 # non-fatal: the syspatch|rollback tarball should have correct perms 246 for _m in 4.4BSD BSD.x11; do 247 mtree -qdef /etc/mtree/${_m}.dist -p / -U >/dev/null || true 248 done 249} 250 251# only run on release (not -current nor -stable) 252set -A _KERNV -- $(sysctl -n kern.version | 253 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 254[[ -z ${_KERNV[1]} ]] 255 256# check args 257[[ $@ == @(|-[[:alpha:]]) ]] || usage 258 259# XXX to be discussed; check for $ARCH? 260[[ -d ${PATCH_PATH} ]] && PATCH_PATH="file://$(readlink -f ${PATCH_PATH})" 261[[ ${PATCH_PATH:%%://*} == @(file|ftp|http|https) ]] || 262 sp_err "No valid PATCH_PATH set" 263 264[[ $(sysctl -n hw.ncpufound) -gt 1 ]] && _BSDMP=true || _BSDMP=false 265_FETCH="/usr/bin/ftp -MVk ${FTP_KEEPALIVE-0}" 266_PDIR="/var/syspatch" 267_REL=${_KERNV[0]} 268_RELINT=${_REL%\.*}${_REL#*\.} 269_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 270readonly _BSDMP _FETCH _PDIR _REL _RELINT _TMP 271 272trap 'rm -rf "${_TMP}"' EXIT 273trap exit HUP INT TERM ERR 274 275[[ -n ${_REL} && -n ${_RELINT} ]] 276 277while getopts clr arg; do 278 case ${arg} in 279 c) ls_missing;; 280 l) ls_installed;; 281 r) rollback_patch;; 282 *) usage;; 283 esac 284done 285shift $(( OPTIND -1 )) 286[[ $# -ne 0 ]] && usage 287 288[[ ${OPTIND} != 1 ]] || apply_patches 289