1#!/bin/ksh 2# 3# $OpenBSD: syspatch.sh,v 1.164 2020/07/18 14:08:07 ajacoutot 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 (($(sysctl -n hw.ncpufound) > 1)) && 47 _s="-s @usr/share/relink/kernel/GENERIC/.*@@g" || 48 _s="-s @usr/share/relink/kernel/GENERIC.MP/.*@@g" 49 _files="$(tar -xvzphf ${_TMP}/syspatch${_patch}.tgz -C ${_edir} \ 50 ${_s})" || { rm -r ${_PDIR}/${_patch}; return 1; } 51 52 checkfs ${_files} 53 create_rollback ${_patch} "${_files}" 54 55 for _file in ${_files}; do 56 ((_rc == 0)) || break 57 [[ ${_file} == usr/sbin/syspatch ]] && _upself=true 58 install_file ${_edir}/${_file} /${_file} || _rc=$? 59 done 60 61 if ((_rc != 0)); then 62 sp_err "Failed to apply patch ${_patch##${_OSrev}-}" 0 63 rollback_patch; return ${_rc} 64 fi 65 # don't fill up /tmp when installing multiple patches at once; non-fatal 66 rm -rf ${_edir} ${_TMP}/syspatch${_patch}.tgz 67 trap exit INT 68 69 echo ${_files} | grep -Eqv \ 70 '(^|[[:blank:]]+)usr/share/relink/kernel/GENERI(C|C.MP)/[[:print:]]+([[:blank:]]+|$)' || 71 _KARL=true 72 73 (! ${_upself} || sp_err "updated itself, run it again to install \ 74missing patches" 2) 75} 76 77# quick-and-dirty filesystem status and size checks: 78# - assume old files are about the same size as new ones 79# - ignore new (nonexistent) files 80# - ignore rollback tarball: create_rollback() will handle the failure 81# - compute total size of all files per fs, simpler and less margin for error 82# (instead of computing before installing each file) 83checkfs() 84{ 85 local _d _dev _df _files="${@}" _sz 86 [[ -n ${_files} ]] 87 88 set +e # ignore errors due to: 89 # - nonexistent files (i.e. syspatch is installing new files) 90 # - broken interpolation due to bogus devices like remote filesystems 91 eval $(cd / && 92 stat -qf "_dev=\"\${_dev} %Sd\"; 93 local %Sd=\"\${%Sd:+\${%Sd}\+}%Uz\"" ${_files}) \ 94 2>/dev/null 95 set -e 96 97 for _d in $(printf '%s\n' ${_dev} | sort -u); do 98 [[ ${_d} != "??" ]] || sp_err "Unsupported filesystem, aborting" 99 mount | grep -v read-only | grep -q "^/dev/${_d} " || 100 sp_err "Read-only filesystem, aborting" 101 _df=$(df -Pk | grep "^/dev/${_d} " | tr -s ' ' | cut -d ' ' -f4) 102 _sz=$(($((_d))/1024)) 103 ((_df > _sz)) || sp_err "No space left on ${_d}, aborting" 104 done 105} 106 107create_rollback() 108{ 109 # XXX annotate new files so we can remove them if we rollback? 110 local _file _patch=$1 _rbfiles _rc=0 111 [[ -n ${_patch} ]] 112 shift 113 local _files="${@}" 114 [[ -n ${_files} ]] 115 116 for _file in ${_files}; do 117 [[ -f /${_file} ]] && _rbfiles="${_rbfiles} ${_file}" 118 done 119 120 tar -C / -czf ${_PDIR}/${_patch}/rollback.tgz ${_rbfiles} || _rc=$? 121 122 if ((_rc != 0)); then 123 sp_err "Failed to create rollback patch ${_patch##${_OSrev}-}" 0 124 rm -r ${_PDIR}/${_patch}; return ${_rc} 125 fi 126} 127 128fetch_and_verify() 129{ 130 local _tgz=$1 _title="Get/Verify" 131 [[ -n ${_tgz} ]] 132 133 [[ -t 0 ]] || echo "${_title} ${_tgz}" 134 unpriv -f "${_TMP}/${_tgz}" ftp -N syspatch -VD "${_title}" -o \ 135 "${_TMP}/${_tgz}" "${_MIRROR}/${_tgz}" 136 137 (cd ${_TMP} && sha256 -qC ${_TMP}/SHA256 ${_tgz}) 138} 139 140install_file() 141{ 142 # XXX handle hard link, dir->file, file->dir? 143 local _dst=$2 _fgrp _fmode _fown _src=$1 144 [[ -f ${_src} && -f ${_dst} ]] 145 146 if [[ -h ${_src} ]]; then 147 ln -sf $(readlink ${_src}) ${_dst} 148 else 149 eval $(stat -f "_fmode=%OMp%OLp _fown=%Su _fgrp=%Sg" ${_src}) 150 install -DFp -m ${_fmode} -o ${_fown} -g ${_fgrp} ${_src} \ 151 ${_dst} 152 fi 153} 154 155ls_installed() 156{ 157 local _p 158 for _p in ${_PDIR}/${_OSrev}-+([[:digit:]])_+([[:alnum:]_-]); do 159 [[ -f ${_p}/rollback.tgz ]] && echo ${_p##*/${_OSrev}-} 160 done 161} 162 163ls_missing() 164{ 165 local _c _f _cmd _l="$(ls_installed)" _p _sha=${_TMP}/SHA256 166 167 # don't output anything on stdout to prevent corrupting the patch list 168 unpriv -f "${_sha}.sig" ftp -N syspatch -MVo "${_sha}.sig" \ 169 "${_MIRROR}/SHA256.sig" >/dev/null 170 unpriv -f "${_sha}" signify -Veq -x ${_sha}.sig -m ${_sha} -p \ 171 /etc/signify/openbsd-${_OSrev}-syspatch.pub >/dev/null 172 173 # sig file less than 3 lines long doesn't list any patch (new release) 174 (($(grep -c ".*" ${_sha}) < 3)) && return 175 176 set -o pipefail 177 grep -Eo "syspatch${_OSrev}-[[:digit:]]{3}_[[:alnum:]_-]+" ${_sha} | 178 while read _c; do _c=${_c##syspatch${_OSrev}-} && 179 [[ -n ${_l} ]] && echo ${_c} | grep -qw -- "${_l}" || echo ${_c} 180 done | while read _p; do 181 _cmd="ftp -N syspatch -MVo - \ 182 ${_MIRROR}/syspatch${_OSrev}-${_p}.tgz" 183 unpriv "${_cmd}" | tar tzf - | while read _f; do 184 # no earlier version of _all_ files contained in the tgz 185 # exists on the system, it means a missing set: skip it 186 [[ -f /${_f} ]] || continue && echo ${_p} && pkill -u \ 187 _syspatch -xf "${_cmd}" || true && break 188 done 189 done | sort -V # only used as a buffer to display all patches at once 190 set +o pipefail 191} 192 193rollback_patch() 194{ 195 local _edir _file _files _patch _rc=0 196 197 _patch="$(ls_installed | tail -1)" 198 [[ -n ${_patch} ]] || return 0 # nothing to rollback 199 200 _edir=${_TMP}/${_patch}-rollback 201 _patch=${_OSrev}-${_patch} 202 203 trap '' INT 204 echo "Reverting patch ${_patch##${_OSrev}-}" 205 install -d ${_edir} 206 207 _files="$(tar xvzphf ${_PDIR}/${_patch}/rollback.tgz -C ${_edir})" 208 checkfs ${_files} ${_PDIR} # check for read-only /var/syspatch 209 210 for _file in ${_files}; do 211 ((_rc == 0)) || break 212 install_file ${_edir}/${_file} /${_file} || _rc=$? 213 done 214 215 ((_rc != 0)) || rm -r ${_PDIR}/${_patch} || _rc=$? 216 ((_rc == 0)) || 217 sp_err "Failed to revert patch ${_patch##${_OSrev}-}" ${_rc} 218 rm -rf ${_edir} # don't fill up /tmp when using `-R'; non-fatal 219 trap exit INT 220 221 echo ${_files} | grep -Eqv \ 222 '(^|[[:blank:]]+)usr/share/relink/kernel/GENERI(C|C.MP)/[[:print:]]+([[:blank:]]+|$)' || 223 _KARL=true 224} 225 226trap_handler() 227{ 228 set +e # we're trapped 229 rm -rf "${_TMP}" 230 231 # in case a patch added a new directory (install -D) 232 if [[ -n ${_PATCHES} ]]; then 233 mtree -qdef /etc/mtree/4.4BSD.dist -p / -U >/dev/null 234 [[ -f /var/sysmerge/xetc.tgz ]] && 235 mtree -qdef /etc/mtree/BSD.x11.dist -p / -U >/dev/null 236 fi 237 238 if ${_KARL}; then 239 echo -n "Relinking to create unique kernel..." 240 if /usr/libexec/reorder_kernel; then 241 echo " done; reboot to load the new kernel" 242 else 243 echo " failed!\n!!! \"/usr/libexec/reorder_kernel\" \ 244must be run manually to install the new kernel" 245 exit 1 246 fi 247 fi 248 249 ${_PATCH_APPLIED} && echo "Errata can be reviewed under ${_PDIR}" 250} 251 252unpriv() 253{ 254 local _file=$2 _rc=0 _user=_syspatch 255 256 if [[ $1 == -f && -n ${_file} ]]; then 257 >${_file} 258 chown "${_user}" "${_file}" 259 chmod 0711 ${_TMP} 260 shift 2 261 fi 262 (($# >= 1)) 263 264 eval su -s /bin/sh ${_user} -c "'$@'" || _rc=$? 265 266 [[ -n ${_file} ]] && chown root "${_file}" 267 268 return ${_rc} 269} 270 271# only run on release (not -current nor -stable) 272set -A _KERNV -- $(sysctl -n kern.version | 273 sed 's/^OpenBSD \([1-9][0-9]*\.[0-9]\)\([^ ]*\).*/\1 \2/;q') 274((${#_KERNV[*]} > 1)) && sp_err "Unsupported release: ${_KERNV[0]}${_KERNV[1]}" 275 276[[ $@ == @(|-[[:alpha:]]) ]] || usage; [[ $@ == @(|-(c|R|r)) ]] && 277 (($(id -u) != 0)) && sp_err "need root privileges" 278[[ $@ == @(|-(R|r)) ]] && pgrep -qxf '/bin/ksh .*reorder_kernel' && 279 sp_err "cannot apply patches while reorder_kernel is running" 280 281_OSrev=${_KERNV[0]%.*}${_KERNV[0]#*.} 282[[ -n ${_OSrev} ]] 283 284_MIRROR=$(while read _line; do _line=${_line%%#*}; [[ -n ${_line} ]] && 285 print -r -- "${_line}"; done </etc/installurl | tail -1) 2>/dev/null 286[[ ${_MIRROR} == @(file|ftp|http|https)://* ]] || 287 _MIRROR=https://cdn.openbsd.org/pub/OpenBSD 288_MIRROR="${_MIRROR}/syspatch/${_KERNV[0]}/$(machine)" 289 290_PATCH_APPLIED=false 291_PDIR="/var/syspatch" 292_TMP=$(mktemp -d -p ${TMPDIR:-/tmp} syspatch.XXXXXXXXXX) 293_KARL=false 294 295readonly _KERNV _MIRROR _OSrev _PDIR _TMP 296 297trap 'trap_handler' EXIT 298trap exit HUP INT TERM 299 300while getopts clRr arg; do 301 case ${arg} in 302 c) ls_missing ;; 303 l) ls_installed ;; 304 R) while [[ -n $(ls_installed) ]]; do rollback_patch; done ;; 305 r) rollback_patch ;; 306 *) usage ;; 307 esac 308done 309shift $((OPTIND - 1)) 310(($# != 0)) && usage 311 312# default action: apply all patches 313if ((OPTIND == 1)); then 314 # remove non matching release /var/syspatch/ content 315 for _D in ${_PDIR}/{.[!.],}*; do 316 [[ -e ${_D} ]] || continue 317 [[ ${_D##*/} == ${_OSrev}-+([[:digit:]])_+([[:alnum:]_-]) ]] && 318 [[ -f ${_D}/rollback.tgz ]] || rm -r ${_D} 319 done 320 _PATCHES=$(ls_missing) # can't use errexit in a for loop 321 for _PATCH in ${_PATCHES}; do 322 apply_patch ${_OSrev}-${_PATCH} 323 _PATCH_APPLIED=true 324 done 325fi 326