1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.72 2016/12/05 16:11:17 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 20umask 0022 21 22sp_err() 23{ 24 echo "${1}" 1>&2 && return ${2:-1} 25} 26 27usage() 28{ 29 sp_err "usage: ${0##*/} [-c | -l | -r]" 30} 31 32apply_patch() 33{ 34 local _explodir _file _files _patch=$1 _ret=0 35 [[ -n ${_patch} ]] 36 37 _explodir=${_TMP}/${_patch} 38 39 echo "Applying patch ${_patch##${_OSrev}-}" 40 fetch_and_verify "syspatch${_patch}.tgz" 41 42 trap '' INT 43 install -d ${_explodir} ${_PDIR}/${_patch} 44 45 _files="$(tar xvzphf ${_TMP}/syspatch${_patch}.tgz -C ${_explodir})" 46 checkfs ${_files} 47 48 create_rollback ${_patch} "${_files}" 49 50 for _file in ${_files}; do 51 ((_ret == 0)) || break 52 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 53 install_kernel ${_explodir}/${_file} || _ret=$? 54 else 55 install_file ${_explodir}/${_file} /${_file} || _ret=$? 56 fi 57 done 58 59 if ((_ret != 0)); then 60 sp_err "Failed to apply patch ${_patch##${_OSrev}-}" 0 61 rollback_patch; return ${_ret} 62 fi 63 trap exit INT 64} 65 66# quick-and-dirty size check: 67# - assume old files are about the same size as new ones 68# - ignore new (nonexistent) files 69# - compute total size of all files per fs, simpler and less margin for error 70# - if we install a kernel, double /bsd size (duplicate it in the list) when: 71# - we are on an MP system (/bsd.mp does not exist there) 72# - /bsd.syspatchXX is not present (create_rollback will copy it from /bsd) 73checkfs() 74{ 75 local _d _df _dev _files="${@}" _sz 76 [[ -n ${_files} ]] 77 78 if echo "${_files}" | grep -qw bsd; then 79 ${_BSDMP} || [[ ! -f /bsd.syspatch${_OSrev} ]] && 80 _files="bsd ${_files}" 81 fi 82 83 eval $(cd / && 84 stat -qf "_dev=\"\${_dev} %Sd\" %Sd=\"\${%Sd:+\${%Sd}\+}%Uz\"" \ 85 ${_files}) || true # ignore nonexistent files 86 87 for _d in $(printf '%s\n' ${_dev} | sort -u); do 88 mount | grep -v read-only | grep -q "^/dev/${_d} " || 89 sp_err "Remote or read-only filesystem, aborting" 90 _df=$(df -Pk | grep "^/dev/${_d} " | tr -s ' ' | cut -d ' ' -f4) 91 _sz=$(($((_d))/1024)) 92 ((_df > _sz)) || sp_err "No space left on ${_d}, aborting" 93 done 94} 95 96create_rollback() 97{ 98 local _file _patch=$1 _rbfiles _ret=0 99 [[ -n ${_patch} ]] 100 shift 101 local _files="${@}" 102 [[ -n ${_files} ]] 103 104 for _file in ${_files}; do 105 [[ -f /${_file} ]] || continue 106 # only save the original release kernel once 107 if [[ ${_file} == bsd && ! -f /bsd.syspatch${_OSrev} ]]; then 108 install -FSp /bsd /bsd.syspatch${_OSrev} 109 fi 110 _rbfiles="${_rbfiles} ${_file}" 111 done 112 113 # GENERIC.MP: substitute bsd.mp->bsd and bsd.sp->bsd 114 if ${_BSDMP} && 115 tar -tzf ${_TMP}/syspatch${_patch}.tgz bsd >/dev/null 2>&1; then 116 tar -C / -czf ${_PDIR}/${_patch}/rollback.tgz -s '/^bsd.mp$//' \ 117 -s '/^bsd$/bsd.mp/' -s '/^bsd.sp$/bsd/' bsd.sp \ 118 ${_rbfiles} || _ret=$? 119 else 120 tar -C / -czf ${_PDIR}/${_patch}/rollback.tgz ${_rbfiles} || 121 _ret=$? 122 fi 123 124 # XXX missing archive (empty _rbfiles list) probably means a missing set 125 [[ -f ${_PDIR}/${_patch}/rollback.tgz ]] || _ret=$? 126 127 if ((_ret != 0)); then 128 sp_err "Failed to create rollback patch ${_patch##${_OSrev}-}" 0 129 rm -r ${_PDIR}/${_patch}; return ${_ret} 130 fi 131} 132 133fetch_and_verify() 134{ 135 local _sig=${_TMP}/SHA256.sig _tgz=$1 136 [[ -n ${_tgz} ]] 137 138 [[ -f ${_sig} ]] || \ 139 unpriv -f "${_sig}" ${_FETCH} -o "${_sig}" "${_URL}/SHA256.sig" 140 141 unpriv -f "${_TMP}/${_tgz}" ${_FETCH} -mD "Get/Verify" -o \ 142 "${_TMP}/${_tgz}" "${_URL}/${_tgz}" 143 144 (cd ${_TMP} && unpriv signify -qC -p \ 145 /etc/signify/openbsd-${_OSrev}-syspatch.pub -x SHA256.sig \ 146 ${_tgz}) 147} 148 149install_file() 150{ 151 # XXX handle symlinks, dir->file, file->dir? 152 local _dst=$2 _fgrp _fmode _fown _src=$1 153 [[ -f ${_src} && -f ${_dst} ]] 154 155 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 156 157 install -DFS -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} ${_dst} 158} 159 160install_kernel() 161{ 162 local _bsd _kern=$1 163 [[ -n ${_kern} ]] 164 165 if ${_BSDMP}; then 166 [[ ${_kern##*/} == bsd ]] && _bsd=bsd.sp || _bsd=bsd 167 fi 168 169 install -FS ${_kern} /${_bsd:-${_kern##*/}} 170} 171 172ls_installed() 173{ 174 local _p 175 for _p in ${_PDIR}/*; do 176 [[ -f ${_p}/rollback.tgz ]] && echo ${_p##*/${_OSrev}-} 177 done | sort -V 178} 179 180ls_missing() 181{ 182 # XXX match with installed sets (comp, x...)? 183 local _index=${_TMP}/index.txt _installed _p 184 _installed="$(ls_installed)" 185 186 unpriv -f "${_index}" ${_FETCH} -o "${_index}" "${_URL}/index.txt" 187 188 for _p in $(grep -o "syspatch${_OSrev}-[0-9][0-9][0-9]_.*" ${_index} | 189 sed "s/^syspatch${_OSrev}-//;s/.tgz$//"| sort -V); do 190 if [[ -n ${_installed} ]]; then 191 echo ${_p} | grep -qw -- "${_installed}" || echo ${_p} 192 else 193 echo ${_p} 194 fi 195 done 196} 197 198rollback_patch() 199{ 200 local _explodir _file _files _patch _ret=0 201 202 _patch="$(ls_installed | sort -V | tail -1)" 203 [[ -n ${_patch} ]] 204 205 _explodir=${_TMP}/${_patch}-rollback 206 _patch=${_OSrev}-${_patch} 207 208 echo "Reverting patch ${_patch##${_OSrev}-}" 209 install -d ${_explodir} 210 211 _files="$(tar xvzphf ${_PDIR}/${_patch}/rollback.tgz -C ${_explodir})" 212 checkfs ${_files} ${_PDIR} # check for read-only /var/syspatch 213 214 for _file in ${_files}; do 215 ((_ret == 0)) || break 216 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 217 install_kernel ${_explodir}/${_file} || _ret=$? 218 # remove the backup kernel if all kernel syspatches have 219 # been reverted; non-fatal (`-f') 220 cmp -s /bsd /bsd.syspatch${_OSrev} && 221 rm -f /bsd.syspatch${_OSrev} 222 else 223 install_file ${_explodir}/${_file} /${_file} || _ret=$? 224 fi 225 done 226 227 ((_ret == 0)) && rm -r ${_PDIR}/${_patch} || 228 sp_err "Failed to revert patch ${_patch##${_OSrev}-}" ${_ret} 229} 230 231sp_cleanup() 232{ 233 local _d _k _m 234 235 # remove non matching release /var/syspatch/ content 236 for _d in ${_PDIR}/*; do 237 [[ -e ${_d} ]] || continue 238 [[ ${_d##*/} == ${_OSrev}-@([0-9][0-9][0-9])_* ]] || rm -r ${_d} 239 done 240 241 # remove non matching release backup kernel 242 for _k in /bsd.syspatch*; do 243 [[ -f ${_k} ]] || continue 244 [[ ${_k} == /bsd.syspatch${_OSrev} ]] || rm ${_k} 245 done 246 247 # in case a patch added a new directory (install -D); 248 # non-fatal in case some mount point is read-only or remote 249 for _m in /etc/mtree/{4.4BSD,BSD.x11}.dist; do 250 [[ -f ${_m} ]] && mtree -qdef ${_m} -p / -U >/dev/null || true 251 done 252} 253 254unpriv() 255{ 256 # XXX use a dedicated user? 257 local _file=$2 _user=_pkgfetch 258 259 if [[ $1 == -f && -n ${_file} ]]; then 260 >${_file} 261 chown "${_user}" "${_file}" 262 chmod 0711 ${_TMP} 263 shift 2 264 fi 265 (($# >= 1)) 266 267 eval su -s /bin/sh ${_user} -c "'$@'" 268} 269 270# XXX needs a way to match release <=> syspatch 271# only run on release (not -current nor -stable) 272set -A _KERNV -- $(sysctl -n kern.version | 273 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 274((${#_KERNV[*]} > 1)) && sp_err "Unsupported release ${_KERNV[*]}" 275 276[[ $@ == @(|-[[:alpha:]]) ]] || usage; [[ $@ == @(|-(c|r)) ]] && 277 (($(id -u) != 0)) && sp_err "${0##*/}: need root privileges" 278 279(($(sysctl -n hw.ncpufound) > 1)) && _BSDMP=true || _BSDMP=false 280_FETCH="ftp -MVk ${FTP_KEEPALIVE-0}" 281_OSrev=${_KERNV[0]%\.*}${_KERNV[0]#*\.} 282_PDIR="/var/syspatch" 283_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 284# XXX to be discussed 285_URL=http://syspatch.openbsd.org/pub/OpenBSD/${_KERNV[0]}/syspatch/$(machine) 286readonly _BSDMP _FETCH _OSrev _PDIR _REL _TMP _URL 287 288trap 'set +e; rm -rf "${_TMP}"' EXIT 289trap exit HUP INT TERM 290 291[[ -n ${_OSrev} ]] 292 293while getopts clr arg; do 294 case ${arg} in 295 c) ls_missing;; 296 l) ls_installed;; 297 r) rollback_patch;; 298 *) usage;; 299 esac 300done 301shift $((OPTIND -1)) 302[[ $# -ne 0 ]] && usage 303 304if ((OPTIND == 1)); then 305 for _PATCH in $(ls_missing); do 306 apply_patch ${_OSrev}-${_PATCH} 307 done 308 sp_cleanup 309fi 310