1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.154 2019/10/23 16:50:14 deraadt Exp $ 4# 5# Copyright (c) 2016, 2017 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 21export PATH=/usr/bin:/bin:/usr/sbin:/sbin 22 23sp_err() 24{ 25 echo "${0##*/}: ${1}" 1>&2 && return ${2:-1} 26} 27 28usage() 29{ 30 echo "usage: ${0##*/} [-c | -l | -R | -r]"; return 1 31} 32 33apply_patch() 34{ 35 local _edir _file _files _patch=$1 _rc=0 _s _upself=false 36 [[ -n ${_patch} ]] 37 38 _edir=${_TMP}/${_patch} 39 40 fetch_and_verify "syspatch${_patch}.tgz" 41 42 trap '' INT 43 echo "Installing patch ${_patch##${_OSrev}-}" 44 install -d ${_edir} ${_PDIR}/${_patch} 45 46 ${_BSDMP} && _s="-s @usr/share/relink/kernel/GENERIC/.*@@g" || 47 _s="-s @usr/share/relink/kernel/GENERIC.MP/.*@@g" 48 _files="$(tar -xvzphf ${_TMP}/syspatch${_patch}.tgz -C ${_edir} \ 49 ${_s})" || { rm -r ${_PDIR}/${_patch}; return 1; } 50 51 checkfs ${_files} 52 create_rollback ${_patch} "${_files}" 53 54 for _file in ${_files}; do 55 ((_rc == 0)) || break 56 [[ ${_file} == usr/sbin/syspatch ]] && _upself=true 57 install_file ${_edir}/${_file} /${_file} || _rc=$? 58 done 59 60 if ((_rc != 0)); then 61 sp_err "Failed to apply patch ${_patch##${_OSrev}-}" 0 62 rollback_patch; return ${_rc} 63 fi 64 # don't fill up /tmp when installing multiple patches at once; non-fatal 65 rm -rf ${_edir} ${_TMP}/syspatch${_patch}.tgz 66 trap exit INT 67 68 echo ${_files} | grep -Eqv \ 69 '(^|[[:blank:]]+)usr/share/relink/kernel/GENERI(C|C.MP)/[[:print:]]+([[:blank:]]+|$)' || 70 _KARL=true 71 72 (! ${_upself} || sp_err "updated itself, run it again to install \ 73missing patches" 2) 74} 75 76# quick-and-dirty filesystem status and size checks: 77# - assume old files are about the same size as new ones 78# - ignore new (nonexistent) files 79# - ignore rollback tarball: create_rollback() will handle the failure 80# - compute total size of all files per fs, simpler and less margin for error 81# (instead of computing before installing each file) 82checkfs() 83{ 84 local _d _dev _df _files="${@}" _rc _sz 85 [[ -n ${_files} ]] 86 87 set +e # ignore errors due to: 88 # - nonexistent files (i.e. syspatch is installing new files) 89 # - broken interpolation due to bogus devices like remote filesystems 90 eval $(cd / && 91 stat -qf "_dev=\"\${_dev} %Sd\"; 92 local %Sd=\"\${%Sd:+\${%Sd}\+}%Uz\"" ${_files}) \ 93 2>/dev/null || _rc=$? 94 set -e 95 [[ ${_rc} == 127 ]] && sp_err "Remote filesystem, aborting" 96 97 for _d in $(printf '%s\n' ${_dev} | sort -u); do 98 mount | grep -v read-only | grep -q "^/dev/${_d} " || 99 sp_err "Read-only filesystem, aborting" 100 _df=$(df -Pk | grep "^/dev/${_d} " | tr -s ' ' | cut -d ' ' -f4) 101 _sz=$(($((_d))/1024)) 102 ((_df > _sz)) || sp_err "No space left on ${_d}, aborting" 103 done 104} 105 106create_rollback() 107{ 108 # XXX annotate new files so we can remove them if we rollback? 109 local _file _patch=$1 _rbfiles _rc=0 110 [[ -n ${_patch} ]] 111 shift 112 local _files="${@}" 113 [[ -n ${_files} ]] 114 115 for _file in ${_files}; do 116 [[ -f /${_file} ]] && _rbfiles="${_rbfiles} ${_file}" 117 done 118 119 tar -C / -czf ${_PDIR}/${_patch}/rollback.tgz ${_rbfiles} || _rc=$? 120 121 if ((_rc != 0)); then 122 sp_err "Failed to create rollback patch ${_patch##${_OSrev}-}" 0 123 rm -r ${_PDIR}/${_patch}; return ${_rc} 124 fi 125} 126 127fetch_and_verify() 128{ 129 local _tgz=$1 _title="Get/Verify" 130 [[ -n ${_tgz} ]] 131 132 [[ -t 0 ]] || echo "${_title} ${_tgz}" 133 unpriv -f "${_TMP}/${_tgz}" ftp -VD "${_title}" -o "${_TMP}/${_tgz}" \ 134 "${_MIRROR}/${_tgz}" 135 136 (cd ${_TMP} && sha256 -qC ${_TMP}/SHA256 ${_tgz}) 137} 138 139install_file() 140{ 141 # XXX handle hard link, dir->file, file->dir? 142 local _dst=$2 _fgrp _fmode _fown _src=$1 143 [[ -f ${_src} && -f ${_dst} ]] 144 145 if [[ -h ${_src} ]]; then 146 ln -sf $(readlink ${_src}) ${_dst} 147 else 148 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 149 install -DFp -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} \ 150 ${_dst} 151 fi 152} 153 154ls_installed() 155{ 156 local _p 157 for _p in ${_PDIR}/${_OSrev}-+([[:digit:]])_+([[:alnum:]_]); do 158 [[ -f ${_p}/rollback.tgz ]] && echo ${_p##*/${_OSrev}-} 159 done | sort -V 160} 161 162ls_missing() 163{ 164 local _c _d _f _cmd _l="$(ls_installed)" _p _r _sha=${_TMP}/SHA256 165 166 # don't output anything on stdout to prevent corrupting the patch list 167 unpriv -f "${_sha}.sig" ftp -MVo "${_sha}.sig" "${_MIRROR}/SHA256.sig" 168 unpriv -f "${_sha}" signify -Veq -x ${_sha}.sig -m ${_sha} -p \ 169 /etc/signify/openbsd-${_OSrev}-syspatch.pub >/dev/null 170 171 # if no earlier version of all files contained in the syspatch exists 172 # on the system, it means a missing set so skip it 173 grep -Eo "syspatch${_OSrev}-[[:digit:]]{3}_[[:alnum:]_]+" ${_sha} | 174 while read _c; do _c=${_c##syspatch${_OSrev}-} && 175 [[ -n ${_l} ]] && echo ${_c} | grep -qw -- "${_l}" || echo ${_c} 176 done | while read _p; do 177 _cmd="ftp -MVo - ${_MIRROR}/syspatch${_OSrev}-${_p}.tgz" 178 { unpriv ${_cmd} | tar tzf -; } 2>/dev/null | while read _f; do 179 [[ -f /${_f} ]] || continue && echo ${_p} && pkill -u \ 180 _syspatch -xf "${_cmd}" || true && break 181 done 182 done | sort -V 183} 184 185rollback_patch() 186{ 187 local _edir _file _files _patch _rc=0 188 189 _patch="$(ls_installed | tail -1)" 190 [[ -n ${_patch} ]] || return 0 # nothing to rollback 191 192 _edir=${_TMP}/${_patch}-rollback 193 _patch=${_OSrev}-${_patch} 194 195 trap '' INT 196 echo "Reverting patch ${_patch##${_OSrev}-}" 197 install -d ${_edir} 198 199 _files="$(tar xvzphf ${_PDIR}/${_patch}/rollback.tgz -C ${_edir})" 200 checkfs ${_files} ${_PDIR} # check for read-only /var/syspatch 201 202 for _file in ${_files}; do 203 ((_rc == 0)) || break 204 install_file ${_edir}/${_file} /${_file} || _rc=$? 205 done 206 207 ((_rc != 0)) || rm -r ${_PDIR}/${_patch} || _rc=$? 208 ((_rc == 0)) || 209 sp_err "Failed to revert patch ${_patch##${_OSrev}-}" ${_rc} 210 rm -rf ${_edir} # don't fill up /tmp when using `-R'; non-fatal 211 trap exit INT 212 213 echo ${_files} | grep -Eqv \ 214 '(^|[[:blank:]]+)usr/share/relink/kernel/GENERI(C|C.MP)/[[:print:]]+([[:blank:]]+|$)' || 215 _KARL=true 216} 217 218trap_handler() 219{ 220 set +e # we're trapped 221 rm -rf "${_TMP}" 222 223 # in case a patch added a new directory (install -D) 224 if [[ -n ${_PATCHES} ]]; then 225 mtree -qdef /etc/mtree/4.4BSD.dist -p / -U >/dev/null 226 [[ -f /var/sysmerge/xetc.tgz ]] && 227 mtree -qdef /etc/mtree/BSD.x11.dist -p / -U >/dev/null 228 fi 229 230 if ${_KARL}; then 231 echo -n "Relinking to create unique kernel..." 232 if /usr/libexec/reorder_kernel; then 233 echo " done; reboot to load the new kernel" 234 else 235 echo " failed!\n!!! \"/usr/libexec/reorder_kernel\" \ 236must be run manually to install the new kernel" 237 exit 1 238 fi 239 fi 240 241 ${_PATCH_APPLIED} && echo "Errata can be reviewed under ${_PDIR}" 242} 243 244unpriv() 245{ 246 local _file=$2 _rc=0 _user=_syspatch 247 248 if [[ $1 == -f && -n ${_file} ]]; then 249 >${_file} 250 chown "${_user}" "${_file}" 251 chmod 0711 ${_TMP} 252 shift 2 253 fi 254 (($# >= 1)) 255 256 # XXX ksh(1) bug; send error code to the caller instead of failing hard 257 set +e 258 eval su -s /bin/sh ${_user} -c "'$@'" || _rc=$? 259 set -e 260 261 [[ -n ${_file} ]] && chown root "${_file}" 262 263 return ${_rc} 264} 265 266# only run on release (not -current nor -stable) 267set -A _KERNV -- $(sysctl -n kern.version | 268 sed 's/^OpenBSD \([1-9][0-9]*\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 269((${#_KERNV[*]} > 1)) && sp_err "Unsupported release: ${_KERNV[0]}${_KERNV[1]}" 270 271[[ $@ == @(|-[[:alpha:]]) ]] || usage; [[ $@ == @(|-(c|R|r)) ]] && 272 (($(id -u) != 0)) && sp_err "need root privileges" 273[[ $@ == @(|-(R|r)) ]] && pgrep -qxf '/bin/ksh .*reorder_kernel' && 274 sp_err "cannot apply patches while reorder_kernel is running" 275 276_OSrev=${_KERNV[0]%.*}${_KERNV[0]#*.} 277[[ -n ${_OSrev} ]] 278 279_MIRROR=$(while read _line; do _line=${_line%%#*}; [[ -n ${_line} ]] && 280 print -r -- "${_line}"; done </etc/installurl | tail -1) 2>/dev/null 281[[ ${_MIRROR} == @(file|ftp|http|https)://* ]] || 282 _MIRROR=https://cdn.openbsd.org/pub/OpenBSD 283_MIRROR="${_MIRROR}/syspatch/${_KERNV[0]}/$(machine)" 284 285(($(sysctl -n hw.ncpufound) > 1)) && _BSDMP=true || _BSDMP=false 286_PATCH_APPLIED=false 287_PDIR="/var/syspatch" 288_TMP=$(mktemp -d -p ${TMPDIR:-/tmp} syspatch.XXXXXXXXXX) 289_KARL=false 290 291readonly _BSDMP _KERNV _MIRROR _OSrev _PDIR _TMP 292 293trap 'trap_handler' EXIT 294trap exit HUP INT TERM 295 296while getopts clRr arg; do 297 case ${arg} in 298 c) ls_missing ;; 299 l) ls_installed ;; 300 R) while [[ -n $(ls_installed) ]]; do rollback_patch; done ;; 301 r) rollback_patch ;; 302 *) usage ;; 303 esac 304done 305shift $((OPTIND - 1)) 306(($# != 0)) && usage 307 308# default action: apply all patches 309if ((OPTIND == 1)); then 310 # remove non matching release /var/syspatch/ content 311 for _D in ${_PDIR}/{.[!.],}*; do 312 [[ -e ${_D} ]] || continue 313 [[ ${_D##*/} == ${_OSrev}-+([[:digit:]])_+([[:alnum:]]|_) ]] && 314 [[ -f ${_D}/rollback.tgz ]] || rm -r ${_D} 315 done 316 _PATCHES=$(ls_missing) 317 for _PATCH in ${_PATCHES}; do 318 apply_patch ${_OSrev}-${_PATCH} 319 _PATCH_APPLIED=true 320 done 321fi 322