1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.75 2016/12/06 16:01:02 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 # XXX annotate new files so we can remove them if we rollback? 99 local _file _patch=$1 _rbfiles _ret=0 100 [[ -n ${_patch} ]] 101 shift 102 local _files="${@}" 103 [[ -n ${_files} ]] 104 105 for _file in ${_files}; do 106 [[ -f /${_file} ]] || continue 107 # only save the original release kernel once 108 if [[ ${_file} == bsd && ! -f /bsd.syspatch${_OSrev} ]]; then 109 install -FSp /bsd /bsd.syspatch${_OSrev} 110 fi 111 _rbfiles="${_rbfiles} ${_file}" 112 done 113 114 # GENERIC.MP: substitute bsd.mp->bsd and bsd.sp->bsd 115 if ${_BSDMP} && 116 tar -tzf ${_TMP}/syspatch${_patch}.tgz bsd >/dev/null 2>&1; then 117 tar -C / -czf ${_PDIR}/${_patch}/rollback.tgz -s '/^bsd.mp$//' \ 118 -s '/^bsd$/bsd.mp/' -s '/^bsd.sp$/bsd/' bsd.sp \ 119 ${_rbfiles} || _ret=$? 120 else 121 tar -C / -czf ${_PDIR}/${_patch}/rollback.tgz ${_rbfiles} || 122 _ret=$? 123 fi 124 125 # missing archive (empty _rbfiles list) 126 [[ -f ${_PDIR}/${_patch}/rollback.tgz ]] || _ret=$? 127 128 if ((_ret != 0)); then 129 sp_err "Failed to create rollback patch ${_patch##${_OSrev}-}" 0 130 rm -r ${_PDIR}/${_patch}; return ${_ret} 131 fi 132} 133 134fetch_and_verify() 135{ 136 local _sig=${_TMP}/SHA256.sig _tgz=$1 137 [[ -n ${_tgz} ]] 138 139 [[ -f ${_sig} ]] || \ 140 unpriv -f "${_sig}" ${_FETCH} -o "${_sig}" "${_URL}/SHA256.sig" 141 142 unpriv -f "${_TMP}/${_tgz}" ${_FETCH} -mD "Get/Verify" -o \ 143 "${_TMP}/${_tgz}" "${_URL}/${_tgz}" 144 145 (cd ${_TMP} && unpriv signify -qC -p \ 146 /etc/signify/openbsd-${_OSrev}-syspatch.pub -x SHA256.sig \ 147 ${_tgz}) 148} 149 150install_file() 151{ 152 # XXX handle symlinks, dir->file, file->dir? 153 local _dst=$2 _fgrp _fmode _fown _src=$1 154 [[ -f ${_src} && -f ${_dst} ]] 155 156 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 157 158 install -DFS -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} ${_dst} 159} 160 161install_kernel() 162{ 163 local _bsd _kern=$1 164 [[ -n ${_kern} ]] 165 166 if ${_BSDMP}; then 167 [[ ${_kern##*/} == bsd ]] && _bsd=bsd.sp || _bsd=bsd 168 fi 169 170 install -FS ${_kern} /${_bsd:-${_kern##*/}} 171} 172 173ls_installed() 174{ 175 local _p 176 for _p in ${_PDIR}/${_OSrev}-+([[:digit:]])_+([[:alnum:]_]); do 177 [[ -f ${_p}/rollback.tgz ]] && echo ${_p##*/${_OSrev}-} 178 done | sort -V 179} 180 181ls_missing() 182{ 183 # XXX match with installed sets 184 local _c _idx=${_TMP}/idx.txt _l="$(ls_installed)" 185 186 unpriv -f "${_idx}" ${_FETCH} -o "${_idx}" "${_URL}/index.txt" 187 188 grep -Eo "syspatch${_OSrev}-[[:digit:]]{3}_[[:alnum:]_]+" ${_idx} | 189 while read _c; do _c=${_c##syspatch${_OSrev}-} && 190 [[ -n ${_l} ]] && echo ${_c} | grep -qw -- "${_l}" || echo ${_c} 191 done | sort -V 192} 193 194rollback_patch() 195{ 196 local _explodir _file _files _patch _ret=0 197 198 _patch="$(ls_installed | tail -1)" 199 [[ -n ${_patch} ]] 200 201 _explodir=${_TMP}/${_patch}-rollback 202 _patch=${_OSrev}-${_patch} 203 204 echo "Reverting patch ${_patch##${_OSrev}-}" 205 install -d ${_explodir} 206 207 _files="$(tar xvzphf ${_PDIR}/${_patch}/rollback.tgz -C ${_explodir})" 208 checkfs ${_files} ${_PDIR} # check for read-only /var/syspatch 209 210 for _file in ${_files}; do 211 ((_ret == 0)) || break 212 if [[ ${_file} == @(bsd|bsd.mp) ]]; then 213 install_kernel ${_explodir}/${_file} || _ret=$? 214 # remove the backup kernel if all kernel syspatches have 215 # been reverted; non-fatal (`-f') 216 cmp -s /bsd /bsd.syspatch${_OSrev} && 217 rm -f /bsd.syspatch${_OSrev} 218 else 219 install_file ${_explodir}/${_file} /${_file} || _ret=$? 220 fi 221 done 222 223 ((_ret == 0)) && rm -r ${_PDIR}/${_patch} || 224 sp_err "Failed to revert patch ${_patch##${_OSrev}-}" ${_ret} 225} 226 227sp_cleanup() 228{ 229 local _d _k _m 230 231 # remove non matching release /var/syspatch/ content 232 for _d in ${_PDIR}/*; do 233 [[ ${_d##*/} == ${_OSrev}-+([[:digit:]])_+([[:alnum:]]|_) ]] && 234 [[ -d ${_d} ]] || rm -r ${_d} 235 done 236 237 # remove non matching release backup kernel 238 for _k in /bsd.syspatch*; do 239 [[ -f ${_k} ]] || continue 240 [[ ${_k} == /bsd.syspatch${_OSrev} ]] || rm ${_k} 241 done 242 243 # in case a patch added a new directory (install -D) 244 for _m in /etc/mtree/{4.4BSD,BSD.x11}.dist; do 245 [[ -f ${_m} ]] && mtree -qdef ${_m} -p / -U >/dev/null 246 done 247} 248 249unpriv() 250{ 251 # XXX use a dedicated user? 252 local _file=$2 _user=_pkgfetch 253 254 if [[ $1 == -f && -n ${_file} ]]; then 255 >${_file} 256 chown "${_user}" "${_file}" 257 chmod 0711 ${_TMP} 258 shift 2 259 fi 260 (($# >= 1)) 261 262 eval su -s /bin/sh ${_user} -c "'$@'" 263} 264 265# XXX needs a way to match release <=> syspatch 266# only run on release (not -current nor -stable) 267set -A _KERNV -- $(sysctl -n kern.version | 268 sed 's/^OpenBSD \([0-9]\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 269((${#_KERNV[*]} > 1)) && sp_err "Unsupported release ${_KERNV[*]}" 270 271[[ $@ == @(|-[[:alpha:]]) ]] || usage; [[ $@ == @(|-(c|r)) ]] && 272 (($(id -u) != 0)) && sp_err "${0##*/}: need root privileges" 273 274(($(sysctl -n hw.ncpufound) > 1)) && _BSDMP=true || _BSDMP=false 275_FETCH="ftp -MVk ${FTP_KEEPALIVE-0}" 276_OSrev=${_KERNV[0]%\.*}${_KERNV[0]#*\.} 277_PDIR="/var/syspatch" 278_TMP=$(mktemp -d -p /tmp syspatch.XXXXXXXXXX) 279# XXX to be discussed 280_URL=http://syspatch.openbsd.org/pub/OpenBSD/${_KERNV[0]}/syspatch/$(machine) 281readonly _BSDMP _FETCH _OSrev _PDIR _REL _TMP _URL 282 283trap 'set +e; rm -rf "${_TMP}"' EXIT 284trap exit HUP INT TERM 285 286[[ -n ${_OSrev} ]] 287 288while getopts clr arg; do 289 case ${arg} in 290 c) ls_missing;; 291 l) ls_installed;; 292 r) rollback_patch;; 293 *) usage;; 294 esac 295done 296shift $((OPTIND -1)) 297[[ $# -ne 0 ]] && usage 298 299if ((OPTIND == 1)); then 300 for _PATCH in $(ls_missing); do 301 apply_patch ${_OSrev}-${_PATCH} 302 done 303 sp_cleanup 304fi 305