templates/lxc-download.in

   1 #!/bin/sh
   2
   3 # Client script for LXC container images.
   4 #
   5 # Copyright © 2014 Stéphane Graber <stgraber@ubuntu.com>
   6 #
   7 #  This library is free software; you can redistribute it and/or
   8 #  modify it under the terms of the GNU Lesser General Public
   9 #  License as published by the Free Software Foundation; either
  10 #  version 2.1 of the License, or (at your option) any later version.
  11
  12 #  This library is distributed in the hope that it will be useful,
  13 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 #  Lesser General Public License for more details.
  16
  17 #  You should have received a copy of the GNU Lesser General Public
  18 #  License along with this library; if not, write to the Free Software
  19 #  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
  20 #  USA
  21
  22 set -eu
  23
  24 LOCALSTATEDIR="@LOCALSTATEDIR@"
  25 LXC_HOOK_DIR="@LXCHOOKDIR@"
  26 LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@"
  27
  28 # Defaults
  29 DOWNLOAD_ARCH=
  30 DOWNLOAD_BUILD=
  31 DOWNLOAD_COMPAT_LEVEL=5
  32 DOWNLOAD_DIST=
  33 DOWNLOAD_FLUSH_CACHE="false"
  34 DOWNLOAD_FORCE_CACHE="false"
  35 DOWNLOAD_INTERACTIVE="false"
  36 DOWNLOAD_KEYID="0xE7FB0CAEC8173D669066514CBAEFF88C22F6E216"
  37 DOWNLOAD_LIST_IMAGES="false"
  38 DOWNLOAD_MODE="system"
  39 DOWNLOAD_READY_GPG="false"
  40 DOWNLOAD_RELEASE=
  41 DOWNLOAD_SERVER="images.linuxcontainers.org"
  42 DOWNLOAD_SHOW_GPG_WARNING="true"
  43 DOWNLOAD_SHOW_HTTP_WARNING="true"
  44 DOWNLOAD_TARGET="system"
  45 DOWNLOAD_URL=
  46 DOWNLOAD_USE_CACHE="false"
  47 DOWNLOAD_VALIDATE="true"
  48 DOWNLOAD_VARIANT="default"
  49 DOWNLOAD_TEMP=
  50
  51 LXC_MAPPED_GID=
  52 LXC_MAPPED_UID=
  53 LXC_NAME=
  54 LXC_PATH=
  55 LXC_ROOTFS=
  56
  57 if [ -z "${DOWNLOAD_KEYSERVER:-}" ]; then
  58   DOWNLOAD_KEYSERVER="hkp://pool.sks-keyservers.net"
  59
  60   # Deal with GPG over http proxy
  61   if [ -n "${http_proxy:-}" ]; then
  62     DOWNLOAD_KEYSERVER="hkp://p80.pool.sks-keyservers.net:80"
  63     DOWNLOAD_GPG_PROXY="--keyserver-options http-proxy=\"${http_proxy}\""
  64   fi
  65 fi
  66
  67 # Make sure the usual locations are in PATH
  68 export PATH=$PATH:/usr/sbin:/usr/bin:/sbin:/bin
  69
  70 # Some useful functions
  71 cleanup() {
  72   if [ -d "${DOWNLOAD_TEMP}" ]; then
  73     rm -Rf "${DOWNLOAD_TEMP}"
  74   fi
  75 }
  76
  77 wget_wrapper() {
  78   for _ in $(seq 3); do
  79     if wget "$@"; then
  80       return 0
  81     fi
  82   done
  83
  84   return 1
  85 }
  86
  87 download_file() {
  88   if ! wget_wrapper -T 30 -q "https://${DOWNLOAD_SERVER}/$1" -O "$2" >/dev/null 2>&1; then
  89     if ! wget_wrapper -T 30 -q "http://${DOWNLOAD_SERVER}/$1" -O "$2" >/dev/null 2>&1; then
  90       if [ "$3" = "noexit" ]; then
  91         return 1
  92       else
  93         echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2
  94         exit 1
  95       fi
  96     elif [ "${DOWNLOAD_SHOW_HTTP_WARNING}" = "true" ]; then
  97       DOWNLOAD_SHOW_HTTP_WARNING="false"
  98       echo "WARNING: Failed to download the file over HTTPs" 1>&2
  99       echo "         The file was instead download over HTTP " 1>&2
 100       echo "A server replay attack may be possible!" 1>&2
 101     fi
 102   fi
 103 }
 104
 105 download_sig() {
 106   if ! download_file "$1" "$2" noexit; then
 107     if [ "${DOWNLOAD_VALIDATE}" = "true" ]; then
 108       if [ "$3" = "normal" ]; then
 109         echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2
 110         exit 1
 111       else
 112         return 1
 113       fi
 114     else
 115       return 0
 116     fi
 117   fi
 118 }
 119
 120 gpg_setup() {
 121   if [ "${DOWNLOAD_VALIDATE}" = "false" ]; then
 122     return
 123   fi
 124
 125   if [ "${DOWNLOAD_READY_GPG}" = "true" ]; then
 126     return
 127   fi
 128
 129   echo "Setting up the GPG keyring"
 130
 131   mkdir -p "${DOWNLOAD_TEMP}/gpg"
 132   chmod 700 "${DOWNLOAD_TEMP}/gpg"
 133   export GNUPGHOME="${DOWNLOAD_TEMP}/gpg"
 134
 135   success=
 136   for _ in $(seq 3); do
 137     if $(gpg --keyserver "${DOWNLOAD_KEYSERVER}" ${DOWNLOAD_GPG_PROXY:-} \
 138       --recv-keys "${DOWNLOAD_KEYID}" >/dev/null 2>&1); then
 139       success=1
 140       break
 141     fi
 142     break
 143   done
 144
 145   if [ -z "${success}" ]; then
 146     echo "ERROR: Unable to fetch GPG key from keyserver"
 147     exit 1
 148   fi
 149
 150   DOWNLOAD_READY_GPG="true"
 151 }
 152
 153 gpg_validate() {
 154   if [ "${DOWNLOAD_VALIDATE}" = "false" ]; then
 155     if [ "${DOWNLOAD_SHOW_GPG_WARNING}" = "true" ]; then
 156       echo "WARNING: Running without gpg validation!" 1>&2
 157     fi
 158     DOWNLOAD_SHOW_GPG_WARNING="false"
 159     return 0
 160   fi
 161
 162   if ! gpg --verify "$1" >/dev/null 2>&1; then
 163     echo "ERROR: Invalid signature for $1" 1>&2
 164     exit 1
 165   fi
 166 }
 167
 168 in_userns() {
 169   [ -e /proc/self/uid_map ] || { echo no; return; }
 170   while read -r line; do
 171     fields="$(echo "$line" | awk '{ print $1 " " $2 " " $3 }')"
 172     if [ "${fields}" = "0 0 4294967295" ]; then
 173       echo no;
 174       return;
 175     fi
 176     if echo "${fields}" | grep -q " 0 1$"; then
 177       echo userns-root;
 178       return;
 179     fi
 180   done < /proc/self/uid_map
 181
 182   [ "$(cat /proc/self/uid_map)" = "$(cat /proc/1/uid_map)" ] && { echo userns-root; return; }
 183   echo yes
 184 }
 185
 186 relevant_file() {
 187   FILE_PATH="${LXC_CACHE_PATH}/$1"
 188
 189   if [ -e "${FILE_PATH}-${DOWNLOAD_MODE}" ]; then
 190     FILE_PATH="${FILE_PATH}-${DOWNLOAD_MODE}"
 191   fi
 192
 193   if [ -e "${FILE_PATH}.${DOWNLOAD_COMPAT_LEVEL}" ]; then
 194     FILE_PATH="${FILE_PATH}.${DOWNLOAD_COMPAT_LEVEL}"
 195   fi
 196
 197   echo "${FILE_PATH}"
 198 }
 199
 200 usage() {
 201   cat <<EOF
 202 LXC container image downloader
 203
 204 Special arguments:
 205 [ -h | --help ]: Print this help message and exit
 206 [ -l | --list ]: List all available images and exit
 207
 208 Required arguments:
 209 [ -d | --dist <distribution> ]: The name of the distribution
 210 [ -r | --release <release> ]: Release name/version
 211 [ -a | --arch <architecture> ]: Architecture of the container
 212
 213 Optional arguments:
 214 [ --variant <variant> ]: Variant of the image (default: "default")
 215 [ --server <server> ]: Image server (default: "images.linuxcontainers.org")
 216 [ --keyid <keyid> ]: GPG keyid (default: 0x...)
 217 [ --keyserver <keyserver> ]: GPG keyserver to use. Environment variable: DOWNLOAD_KEYSERVER
 218 [ --no-validate ]: Disable GPG validation (not recommended)
 219 [ --flush-cache ]: Flush the local copy (if present)
 220 [ --force-cache ]: Force the use of the local copy even if expired
 221
 222 LXC internal arguments (do not pass manually!):
 223 [ --name <name> ]: The container name
 224 [ --path <path> ]: The path to the container
 225 [ --rootfs <rootfs> ]: The path to the container's rootfs
 226 [ --mapped-uid <map> ]: A uid map (user namespaces)
 227 [ --mapped-gid <map> ]: A gid map (user namespaces)
 228
 229 Environment Variables:
 230 DOWNLOAD_KEYSERVER : The URL of the key server to use, instead of the default.
 231                      Can be further overridden by using optional argument --keyserver
 232
 233 EOF
 234   return 0
 235 }
 236
 237 if ! options=$(getopt -o d:r:a:hl -l dist:,release:,arch:,help,list,variant:,\
 238 server:,keyid:,keyserver:,no-validate,flush-cache,force-cache,name:,path:,\
 239 rootfs:,mapped-uid:,mapped-gid: -- "$@"); then
 240   usage
 241   exit 1
 242 fi
 243 eval set -- "$options"
 244
 245 while :; do
 246   case "$1" in
 247     -h|--help)     usage && exit 1;;
 248     -l|--list)     DOWNLOAD_LIST_IMAGES="true"; shift 1;;
 249     -d|--dist)     DOWNLOAD_DIST="$2"; shift 2;;
 250     -r|--release)  DOWNLOAD_RELEASE="$2"; shift 2;;
 251     -a|--arch)     DOWNLOAD_ARCH="$2"; shift 2;;
 252     --variant)     DOWNLOAD_VARIANT="$2"; shift 2;;
 253     --server)      DOWNLOAD_SERVER="$2"; shift 2;;
 254     --keyid)       DOWNLOAD_KEYID="$2"; shift 2;;
 255     --keyserver)   DOWNLOAD_KEYSERVER="$2"; shift 2;;
 256     --no-validate) DOWNLOAD_VALIDATE="false"; shift 1;;
 257     --flush-cache) DOWNLOAD_FLUSH_CACHE="true"; shift 1;;
 258     --force-cache) DOWNLOAD_FORCE_CACHE="true"; shift 1;;
 259     --name)        LXC_NAME="$2"; shift 2;;
 260     --path)        LXC_PATH="$2"; shift 2;;
 261     --rootfs)      LXC_ROOTFS="$2"; shift 2;;
 262     --mapped-uid)  LXC_MAPPED_UID="$2"; shift 2;;
 263     --mapped-gid)  LXC_MAPPED_GID="$2"; shift 2;;
 264     *)             break;;
 265   esac
 266 done
 267
 268 # Check for required binaries
 269 for bin in tar xz wget; do
 270   if ! command -V "${bin}" >/dev/null 2>&1; then
 271     echo "ERROR: Missing required tool: ${bin}" 1>&2
 272     exit 1
 273   fi
 274 done
 275
 276 # Check for GPG
 277 if [ "${DOWNLOAD_VALIDATE}" = "true" ]; then
 278   if ! command -V gpg >/dev/null 2>&1; then
 279     echo "ERROR: Missing recommended tool: gpg" 1>&2
 280     echo "You can workaround this by using --no-validate" 1>&2
 281     exit 1
 282   fi
 283 fi
 284
 285 # Check that we have all variables we need
 286 if [ -z "${LXC_NAME}" ] || [ -z "${LXC_PATH}" ] || [ -z "${LXC_ROOTFS}" ]; then
 287   if [ "${DOWNLOAD_LIST_IMAGES}" != "true" ]; then
 288     echo "ERROR: Please pass the name, path, and rootfs for the container" 1>&2
 289     exit 1
 290   fi
 291 fi
 292
 293 USERNS="$(in_userns)"
 294
 295 if [ "${USERNS}" != "no" ]; then
 296   if [ "${USERNS}" = "yes" ]; then
 297     if [ -z "${LXC_MAPPED_UID}" ] || [ "${LXC_MAPPED_UID}" = "-1" ]; then
 298       echo "ERROR: In a user namespace without a map" 1>&2
 299       exit 1
 300     fi
 301     DOWNLOAD_MODE="user"
 302     DOWNLOAD_TARGET="user"
 303   else
 304     DOWNLOAD_MODE="user"
 305     DOWNLOAD_TARGET="system"
 306   fi
 307 fi
 308
 309 if [ -z "${DOWNLOAD_DIST}" ] || [ -z "${DOWNLOAD_RELEASE}" ] || [ -z "${DOWNLOAD_ARCH}" ]; then
 310   DOWNLOAD_INTERACTIVE="true"
 311 fi
 312
 313 # Trap all exit signals
 314 trap cleanup EXIT HUP INT TERM
 315
 316 # /tmp may be mounted in tmpfs or noexec
 317 if mountpoint -q /tmp; then
 318   DOWNLOAD_TEMP="${LXC_PATH}"
 319 fi
 320
 321 if ! command -V mktemp >/dev/null 2>&1; then
 322   DOWNLOAD_TEMP="${DOWNLOAD_TEMP}/tmp/lxc-download.$$"
 323 elif [ -n "${DOWNLOAD_TEMP}" ]; then
 324   mkdir -p "${DOWNLOAD_TEMP}"
 325   DOWNLOAD_TEMP="$(mktemp -p ${DOWNLOAD_TEMP} -d)"
 326 else
 327   DOWNLOAD_TEMP="${DOWNLOAD_TEMP}$(mktemp -d)"
 328 fi
 329
 330 # Simply list images
 331 if [ "${DOWNLOAD_LIST_IMAGES}" = "true" ] || [ "${DOWNLOAD_INTERACTIVE}" = "true" ]; then
 332   # Initialize GPG
 333   gpg_setup
 334
 335   # Grab the index
 336   DOWNLOAD_INDEX_PATH="/meta/1.0/index-${DOWNLOAD_MODE}"
 337
 338   echo "Downloading the image index"
 339   if ! download_file "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}" "${DOWNLOAD_TEMP}/index" noexit ||
 340      ! download_sig "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc" "${DOWNLOAD_TEMP}/index.asc" noexit; then
 341     download_file "${DOWNLOAD_INDEX_PATH}" "${DOWNLOAD_TEMP}/index" normal
 342     download_sig "${DOWNLOAD_INDEX_PATH}.asc" "${DOWNLOAD_TEMP}/index.asc" normal
 343   fi
 344
 345   gpg_validate "${DOWNLOAD_TEMP}/index.asc"
 346
 347   # Parse it
 348   echo ""
 349   echo "---"
 350   printf "DIST\tRELEASE\tARCH\tVARIANT\tBUILD\n"
 351   echo "---"
 352   while IFS=';' read -r f1 f2 f3 f4 f5 f6; do
 353     [ -n "${DOWNLOAD_DIST}" ] && [ "$f1" != "${DOWNLOAD_DIST}" ] && continue
 354     [ -n "${DOWNLOAD_RELEASE}" ] && [ "$f2" != "${DOWNLOAD_RELEASE}" ] && continue
 355     [ -n "${DOWNLOAD_ARCH}" ] && [ "$f3" != "${DOWNLOAD_ARCH}" ] && continue
 356     [ -n "${DOWNLOAD_VARIANT}" ] && [ "$f4" != "${DOWNLOAD_VARIANT}" ] && continue
 357     [ -z "${f5}" ] || [ -z "${f6}" ] && continue
 358
 359     printf "%s\t%s\t%s\t%s\t%s\n" "${f1}" "${f2}" "${f3}" "${f4}" "${f5}"
 360     unset f1 f2 f3 f4 f5 f6
 361   done < "${DOWNLOAD_TEMP}/index"
 362   echo "---"
 363
 364   if [ "${DOWNLOAD_LIST_IMAGES}" = "true" ]; then
 365     exit 1
 366   fi
 367
 368   # Interactive mode
 369   echo ""
 370
 371   if [ -z "${DOWNLOAD_DIST}" ]; then
 372     echo "Distribution: "
 373     read -r DOWNLOAD_DIST
 374   fi
 375
 376   if [ -z "${DOWNLOAD_RELEASE}" ]; then
 377     echo "Release: "
 378     read -r DOWNLOAD_RELEASE
 379   fi
 380
 381   if [ -z "${DOWNLOAD_ARCH}" ]; then
 382     echo "Architecture: "
 383     read -r DOWNLOAD_ARCH
 384   fi
 385
 386   echo ""
 387 fi
 388
 389 # Setup the cache
 390 if [ "${DOWNLOAD_TARGET}" = "system" ]; then
 391   LXC_CACHE_BASE="${LOCALSTATEDIR}/cache/lxc/"
 392 else
 393   LXC_CACHE_BASE="${HOME}/.cache/lxc/"
 394 fi
 395
 396 # Allow the setting of the LXC_CACHE_PATH with the usage of environment variables.
 397 LXC_CACHE_PATH="${LXC_CACHE_PATH:-"${LXC_CACHE_BASE}"}"
 398 LXC_CACHE_PATH="${LXC_CACHE_PATH}/download/${DOWNLOAD_DIST}"
 399 LXC_CACHE_PATH="${LXC_CACHE_PATH}/${DOWNLOAD_RELEASE}/${DOWNLOAD_ARCH}/"
 400 LXC_CACHE_PATH="${LXC_CACHE_PATH}/${DOWNLOAD_VARIANT}"
 401
 402 if [ -d "${LXC_CACHE_PATH}" ]; then
 403   if [ "${DOWNLOAD_FLUSH_CACHE}" = "true" ]; then
 404     echo "Flushing the cache..."
 405     rm -Rf "${LXC_CACHE_PATH}"
 406   elif [ "${DOWNLOAD_FORCE_CACHE}" = "true" ]; then
 407     DOWNLOAD_USE_CACHE="true"
 408   else
 409     DOWNLOAD_USE_CACHE="true"
 410     if [ -e "$(relevant_file expiry)" ]; then
 411       if [ "$(cat "$(relevant_file expiry)")" -lt "$(date +%s)" ]; then
 412         echo "The cached copy has expired, re-downloading..."
 413         DOWNLOAD_USE_CACHE="false"
 414       fi
 415     fi
 416   fi
 417 fi
 418
 419 # Download what's needed
 420 if [ "${DOWNLOAD_USE_CACHE}" = "false" ]; then
 421   # Initialize GPG
 422   gpg_setup
 423
 424   # Grab the index
 425   DOWNLOAD_INDEX_PATH="/meta/1.0/index-${DOWNLOAD_MODE}"
 426
 427   echo "Downloading the image index"
 428   if ! download_file "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}" "${DOWNLOAD_TEMP}/index" noexit ||
 429      ! download_sig "${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc" "${DOWNLOAD_TEMP}/index.asc" noexit; then
 430     download_file "${DOWNLOAD_INDEX_PATH}" "${DOWNLOAD_TEMP}/index" normal
 431     download_sig "${DOWNLOAD_INDEX_PATH}.asc" "${DOWNLOAD_TEMP}/index.asc" normal
 432   fi
 433
 434   gpg_validate "${DOWNLOAD_TEMP}/index.asc"
 435
 436   # Parse it
 437   while IFS=';' read -r f1 f2 f3 f4 f5 f6; do
 438     if [ "${f1}" != "${DOWNLOAD_DIST}" ] || \
 439        [ "${f2}" != "${DOWNLOAD_RELEASE}" ] || \
 440        [ "${f3}" != "${DOWNLOAD_ARCH}" ] || \
 441        [ "${f4}" != "${DOWNLOAD_VARIANT}" ] || \
 442        [ -z "${f6}" ]; then
 443         continue
 444     fi
 445
 446     DOWNLOAD_BUILD="${f5}"
 447     DOWNLOAD_URL="${f6}"
 448
 449     unset f1 f2 f3 f4 f5 f6
 450     break
 451   done < "${DOWNLOAD_TEMP}/index"
 452
 453   if [ -z "${DOWNLOAD_URL}" ]; then
 454     echo "ERROR: Couldn't find a matching image" 1>&1
 455     exit 1
 456   fi
 457
 458   if [ -d "${LXC_CACHE_PATH}" ] && [ -f "${LXC_CACHE_PATH}/build_id" ] && \
 459      [ "$(cat "${LXC_CACHE_PATH}/build_id")" = "${DOWNLOAD_BUILD}" ]; then
 460     echo "The cache is already up to date"
 461     echo "Using image from local cache"
 462   else
 463     # Download the actual files
 464     echo "Downloading the rootfs"
 465     download_file "${DOWNLOAD_URL}/rootfs.tar.xz" "${DOWNLOAD_TEMP}/rootfs.tar.xz" normal
 466     download_sig "${DOWNLOAD_URL}/rootfs.tar.xz.asc" "${DOWNLOAD_TEMP}/rootfs.tar.xz.asc" normal
 467     gpg_validate "${DOWNLOAD_TEMP}/rootfs.tar.xz.asc"
 468
 469     echo "Downloading the metadata"
 470     download_file "${DOWNLOAD_URL}/meta.tar.xz" "${DOWNLOAD_TEMP}/meta.tar.xz" normal
 471     download_sig "$DOWNLOAD_URL/meta.tar.xz.asc" "${DOWNLOAD_TEMP}/meta.tar.xz.asc" normal
 472     gpg_validate "${DOWNLOAD_TEMP}/meta.tar.xz.asc"
 473
 474     if [ -d "${LXC_CACHE_PATH}" ]; then
 475       rm -Rf "${LXC_CACHE_PATH}"
 476     fi
 477     mkdir -p "${LXC_CACHE_PATH}"
 478     mv "${DOWNLOAD_TEMP}/rootfs.tar.xz" "${LXC_CACHE_PATH}"
 479     if ! tar Jxf "${DOWNLOAD_TEMP}/meta.tar.xz" -C "${LXC_CACHE_PATH}"; then
 480       echo "ERROR: Invalid rootfs tarball." 2>&1
 481       exit 1
 482     fi
 483
 484     echo "${DOWNLOAD_BUILD}" > "${LXC_CACHE_PATH}/build_id"
 485
 486     if [ -n "${LXC_MAPPED_UID}" ] && [ "${LXC_MAPPED_UID}" != "-1" ]; then
 487       # As the script is run in strict mode (set -eu), all commands
 488       # exiting with non 0 would make the script stop.
 489       # || true or || : (more portable) prevents that.
 490       chown -R "${LXC_MAPPED_UID}" "${LXC_CACHE_BASE}" >/dev/null 2>&1 || :
 491     fi
 492     if [ -n "${LXC_MAPPED_GID}" ] && [ "${LXC_MAPPED_GID}" != "-1" ]; then
 493       chgrp -R "${LXC_MAPPED_GID}" "${LXC_CACHE_BASE}" >/dev/null 2>&1 || :
 494     fi
 495     echo "The image cache is now ready"
 496   fi
 497 else
 498   echo "Using image from local cache"
 499 fi
 500
 501 # Unpack the rootfs
 502 echo "Unpacking the rootfs"
 503
 504 EXCLUDES=""
 505 excludelist=$(relevant_file excludes)
 506 if [ -f "${excludelist}" ]; then
 507   while read -r line; do
 508     EXCLUDES="${EXCLUDES} --exclude=${line}"
 509   done < "${excludelist}"
 510 fi
 511
 512 # Do not surround ${EXCLUDES} by quotes. This does not work. The solution could
 513 # use array but this is not POSIX compliant. The only POSIX compliant solution
 514 # is to use a function wrapper, but the latter can't be used here as the args
 515 # are dynamic. We thus need to ignore the warning brought by shellcheck.
 516 # shellcheck disable=SC2086
 517 tar  --anchored ${EXCLUDES} --numeric-owner -xpJf "${LXC_CACHE_PATH}/rootfs.tar.xz" -C "${LXC_ROOTFS}"
 518
 519 mkdir -p "${LXC_ROOTFS}/dev/pts/"
 520
 521 # Setup the configuration
 522 configfile="$(relevant_file config)"
 523 fstab="$(relevant_file fstab)"
 524 if [ ! -e "${configfile}" ]; then
 525   echo "ERROR: meta tarball is missing the configuration file" 1>&2
 526   exit 1
 527 fi
 528
 529 ## Extract all the network config entries
 530 sed -i -e "/lxc.net.0/{w ${LXC_PATH}/config-network" -e "d}" "${LXC_PATH}/config"
 531
 532 ## Extract any other config entry
 533 sed -i -e "/lxc./{w ${LXC_PATH}/config-auto" -e "d}" "${LXC_PATH}/config"
 534
 535 ## Append the defaults
 536 {
 537   echo ""
 538   echo "# Distribution configuration"
 539   cat "$configfile"
 540 } >> "${LXC_PATH}/config"
 541
 542 ## Add the container-specific config
 543 {
 544   echo ""
 545   echo "# Container specific configuration"
 546   if [ -e "${LXC_PATH}/config-auto" ]; then
 547     cat "${LXC_PATH}/config-auto"
 548     rm "${LXC_PATH}/config-auto"
 549   fi
 550   if [ -e "${fstab}" ]; then
 551     echo "lxc.mount.fstab = ${LXC_PATH}/fstab"
 552   fi
 553   echo "lxc.uts.name = ${LXC_NAME}"
 554 } >> "${LXC_PATH}/config"
 555
 556 ## Re-add the previously removed network config
 557 if [ -e "${LXC_PATH}/config-network" ]; then
 558   {
 559     echo ""
 560     echo "# Network configuration"
 561     cat "${LXC_PATH}/config-network"
 562     rm "${LXC_PATH}/config-network"
 563   } >> "${LXC_PATH}/config"
 564 fi
 565
 566 TEMPLATE_FILES="${LXC_PATH}/config"
 567
 568 # Setup the fstab
 569 if [ -e "${fstab}" ]; then
 570   cp "${fstab}" "${LXC_PATH}/fstab"
 571   TEMPLATE_FILES="${TEMPLATE_FILES};${LXC_PATH}/fstab"
 572 fi
 573
 574 # Look for extra templates
 575 if [ -e "$(relevant_file templates)" ]; then
 576   while read -r line; do
 577     fullpath="${LXC_ROOTFS}/${line}"
 578     [ ! -e "${fullpath}" ] && continue
 579     TEMPLATE_FILES="${TEMPLATE_FILES};${fullpath}"
 580   done < "$(relevant_file templates)"
 581 fi
 582
 583 # Replace variables in all templates
 584 OLD_IFS=${IFS}
 585 IFS=";"
 586 for file in ${TEMPLATE_FILES}; do
 587     [ ! -f "${file}" ] && continue
 588   sed -i "s#LXC_NAME#${LXC_NAME}#g" "${file}"
 589   sed -i "s#LXC_PATH#${LXC_PATH}#g" "${file}"
 590   sed -i "s#LXC_ROOTFS#${LXC_ROOTFS}#g" "${file}"
 591   sed -i "s#LXC_TEMPLATE_CONFIG#${LXC_TEMPLATE_CONFIG}#g" "${file}"
 592   sed -i "s#LXC_HOOK_DIR#${LXC_HOOK_DIR}#g" "${file}"
 593 done
 594 IFS=${OLD_IFS}
 595
 596 # prevent mingetty from calling vhangup(2) since it fails with userns on CentOS / Oracle
 597 if [ -f "${LXC_ROOTFS}/etc/init/tty.conf" ]; then
 598   sed -i 's|mingetty|mingetty --nohangup|' "${LXC_ROOTFS}/etc/init/tty.conf"
 599 fi
 600
 601 if [ -n "${LXC_MAPPED_UID}" ] && [ "${LXC_MAPPED_UID}" != "-1" ]; then
 602   chown "${LXC_MAPPED_UID}" "${LXC_PATH}/config" "${LXC_PATH}/fstab" >/dev/null 2>&1 || :
 603 fi
 604
 605 if [ -n "${LXC_MAPPED_GID}" ] && [ "${LXC_MAPPED_GID}" != "-1" ]; then
 606   chgrp "${LXC_MAPPED_GID}" "${LXC_PATH}/config" "${LXC_PATH}/fstab" >/dev/null 2>&1 || :
 607 fi
 608
 609 if [ -e "$(relevant_file create-message)" ]; then
 610   echo ""
 611   echo "---"
 612   cat "$(relevant_file create-message)"
 613 fi
 614
 615 exit 0