[mirror_lxc.git] / templates / lxc-download.in

#!/bin/sh

# Client script for LXC container images.
#
# Copyright © 2014 Stéphane Graber <stgraber@ubuntu.com>
#
#  This library is free software; you can redistribute it and/or
#  modify it under the terms of the GNU Lesser General Public
#  License as published by the Free Software Foundation; either
#  version 2.1 of the License, or (at your option) any later version.

#  This library is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#  Lesser General Public License for more details.

#  You should have received a copy of the GNU Lesser General Public
#  License along with this library; if not, write to the Free Software
#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
#  USA

set -eu

LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@"
LXC_HOOK_DIR="@LXCHOOKDIR@"
LOCALSTATEDIR="@LOCALSTATEDIR@"

# Defaults
DOWNLOAD_DIST=
DOWNLOAD_RELEASE=
DOWNLOAD_ARCH=
DOWNLOAD_VARIANT="default"
DOWNLOAD_SERVER="images.linuxcontainers.org"
DOWNLOAD_KEYID="0xBAEFF88C22F6E216"
DOWNLOAD_KEYSERVER="hkp://pool.sks-keyservers.net"
DOWNLOAD_VALIDATE="true"
DOWNLOAD_FLUSH_CACHE="false"
DOWNLOAD_FORCE_CACHE="false"
DOWNLOAD_MODE="system"
DOWNLOAD_USE_CACHE="false"
DOWNLOAD_URL=
DOWNLOAD_SHOW_HTTP_WARNING="true"
DOWNLOAD_SHOW_GPG_WARNING="true"
DOWNLOAD_READY_GPG="false"
DOWNLOAD_COMPAT_LEVEL=1
DOWNLOAD_LIST_IMAGES="false"
DOWNLOAD_BUILD=
DOWNLOAD_INTERACTIVE="false"

LXC_NAME=
LXC_PATH=
LXC_ROOTFS=
LXC_MAPPED_UID=
LXC_MAPPED_GID=

# Deal with GPG over http proxy
if [ -n "${http_proxy:-}" ]; then
    DOWNLOAD_KEYSERVER="${DOWNLOAD_KEYSERVER}:80"
fi

# Some useful functions
cleanup() {
    if [ -d "$DOWNLOAD_TEMP" ]; then
        rm -Rf $DOWNLOAD_TEMP
    fi
}

download_file() {
    if ! wget -q https://${DOWNLOAD_SERVER}/$1 -O $2 >/dev/null 2>&1; then
        if ! wget -q http://${DOWNLOAD_SERVER}/$1 -O $2 >/dev/null 2>&1; then
            if [ "$3" = "noexit" ]; then
                return 1
            else
                echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2
                exit 1
            fi
        elif [ "$DOWNLOAD_SHOW_HTTP_WARNING" = "true" ]; then
            DOWNLOAD_SHOW_HTTP_WARNING="false"
            echo "WARNING: Failed to download the file over HTTPs." 1>&2
            echo -n "         The file was instead download over HTTP. " 1>&2
            echo "A server replay attack may be possible!" 1>&2
        fi
    fi
}

download_sig() {
    if ! download_file $1 $2 noexit; then
        if [ "$DOWNLOAD_VALIDATE" = "true" ]; then
            if [ "$3" = "normal" ]; then
                echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2
                exit 1
            else
                return 1
            fi
        else
            return 0
        fi
    fi
}

gpg_setup() {
    if [ "$DOWNLOAD_VALIDATE" = "false" ]; then
        return
    fi

    if [ "$DOWNLOAD_READY_GPG" = "true" ]; then
        return
    fi

    echo "Setting up the GPG keyring"

    mkdir -p "$DOWNLOAD_TEMP/gpg"
    chmod 700 "$DOWNLOAD_TEMP/gpg"
    export GNUPGHOME="$DOWNLOAD_TEMP/gpg"
    if ! gpg --keyserver $DOWNLOAD_KEYSERVER \
            --recv-keys ${DOWNLOAD_KEYID} >/dev/null 2>&1; then
        echo "ERROR: Unable to fetch GPG key from keyserver."
        exit 1
    fi

    DOWNLOAD_READY_GPG="true"
}

gpg_validate() {
    if [ "$DOWNLOAD_VALIDATE" = "false" ]; then
        if [ "$DOWNLOAD_SHOW_GPG_WARNING" = "true" ]; then
            echo "WARNING: Running without gpg validation!" 1>&2
        fi
        DOWNLOAD_SHOW_GPG_WARNING="false"
        return 0
    fi

    if ! gpg --verify $1 >/dev/zero 2>&1; then
        echo "ERROR: Invalid signature for $1" 1>&2
        exit 1
    fi
}

in_userns() {
    [ -e /proc/self/uid_map ] || { echo no; return; }
    [ "$(wc -l /proc/self/uid_map | awk '{ print $1 }')" -eq 1 ] || \
        { echo yes; return; }
    line=$(awk '{ print $1 " " $2 " " $3 }' /proc/self/uid_map)
    [ "$line" = "0 0 4294967295" ] && { echo no; return; }
    echo yes
}

relevant_file() {
    FILE_PATH="${LXC_CACHE_PATH}/$1"
    if [ -e "${FILE_PATH}-${DOWNLOAD_MODE}" ]; then
        FILE_PATH="${FILE_PATH}-${DOWNLOAD_MODE}"
    fi
    if [ -e "$FILE_PATH.${DOWNLOAD_COMPAT_LEVEL}" ]; then
        FILE_PATH="${FILE_PATH}.${DOWNLOAD_COMPAT_LEVEL}"
    fi

    echo $FILE_PATH
}

usage() {
    cat <<EOF
LXC container image downloader

Required arguments:
[ -d | --dist <distribution> ]: The name of the distribution
[ -r | --release <release> ]: Release name/version
[ -a | --arch <architecture> ]: Architecture of the container

Optional arguments:
[ -h | --help ]: This help message
[ -l | --list ]: List all available images
[ --variant <variant> ]: Variant of the image (default: "default")
[ --server <server> ]: Image server (default: "images.linuxcontainers.org")
[ --keyid <keyid> ]: GPG keyid (default: 0x...)
[ --keyserver <keyserver> ]: GPG keyserver to use
[ --no-validate ]: Disable GPG validation (not recommended)
[ --flush-cache ]: Flush the local copy (if present)
[ --force-cache ]; Force the use of the local copy even if expired

LXC internal arguments (do not pass manually!):
[ --name <name> ]: The container name
[ --path <path> ]: The path to the container
[ --rootfs <rootfs> ]: The path to the container's rootfs
[ --mapped-uid <map> ]: A uid map (user namespaces)
[ --mapped-gid <map> ]: A gid map (user namespaces)
EOF
    return 0
}

options=$(getopt -o d:r:a:hl -l dist:,release:,arch:,help,list,variant:,\
server:,keyid:,no-validate,flush-cache,force-cache,name:,path:,\
rootfs:,mapped-uid:,mapped-gid: -- "$@")

if [ $? -ne 0 ]; then
    usage
    exit 1
fi
eval set -- "$options"

while :; do
    case "$1" in
        -h|--help)          usage && exit 1;;
        -l|--list)          DOWNLOAD_LIST_IMAGES="true"; shift 1;;
        -d|--dist)          DOWNLOAD_DIST=$2; shift 2;;
        -r|--release)       DOWNLOAD_RELEASE=$2; shift 2;;
        -a|--arch)          DOWNLOAD_ARCH=$2; shift 2;;
        --variant)          DOWNLOAD_VARIANT=$2; shift 2;;
        --server)           DOWNLOAD_SERVER=$2; shift 2;;
        --keyid)            DOWNLOAD_KEYID=$2; shift 2;;
        --no-validate)      DOWNLOAD_VALIDATE="false"; shift 1;;
        --flush-cache)      DOWNLOAD_FLUSH_CACHE="true"; shift 1;;
        --force-cache)      DOWNLOAD_FORCE_CACHE="true"; shift 1;;
        --name)             LXC_NAME=$2; shift 2;;
        --path)             LXC_PATH=$2; shift 2;;
        --rootfs)           LXC_ROOTFS=$2; shift 2;;
        --mapped-uid)       LXC_MAPPED_UID=$2; shift 2;;
        --mapped-gid)       LXC_MAPPED_GID=$2; shift 2;;
        *)                  break;;
    esac
done

# Check for required binaries
for bin in tar xz wget; do
    if ! type $bin >/dev/null 2>&1; then
        echo "ERROR: Missing required tool: $bin" 1>&2
        exit 1
    fi
done

# Check for GPG
if [ "$DOWNLOAD_VALIDATE" = "true" ]; then
    if ! type gpg >/dev/null 2>&1; then
        echo "ERROR: Missing recommended tool: gpg" 1>&2
        echo "You can workaround this by using --no-validate." 1>&2
        exit 1
    fi
fi

# Check that we have all variables we need
if [ -z "$LXC_NAME" ] || [ -z "$LXC_PATH" ] || [ -z "$LXC_ROOTFS" ]; then
    echo "ERROR: Not running through LXC." 1>&2
    exit 1
fi

if [ "$(in_userns)" = "yes" ]; then
    if [ -z "$LXC_MAPPED_UID" ] || [ "$LXC_MAPPED_UID" = "-1" ]; then
        echo "ERROR: In a user namespace without a map." 1>&2
        exit 1
    fi
    DOWNLOAD_MODE="user"
fi

if [ -z "$DOWNLOAD_DIST" ] || [ -z "$DOWNLOAD_RELEASE" ] || \
   [ -z "$DOWNLOAD_ARCH" ]; then
    DOWNLOAD_INTERACTIVE="true"
fi

# Trap all exit signals
trap cleanup EXIT HUP INT TERM

if ! type mktemp >/dev/null 2>&1; then
    DOWNLOAD_TEMP=/tmp/lxc-download.$$
    mkdir -p $DOWNLOAD_TEMP
else
    DOWNLOAD_TEMP=$(mktemp -d)
fi

# Simply list images
if [ "$DOWNLOAD_LIST_IMAGES" = "true" ] || \
   [ "$DOWNLOAD_INTERACTIVE" = "true" ]; then
    # Initialize GPG
    gpg_setup

    # Grab the index
    DOWNLOAD_INDEX_PATH=/meta/1.0/index-${DOWNLOAD_MODE}

    echo "Downloading the image index"
    if ! download_file ${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL} \
         ${DOWNLOAD_TEMP}/index noexit ||
       ! download_sig ${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc \
            ${DOWNLOAD_TEMP}/index.asc noexit; then
        download_file ${DOWNLOAD_INDEX_PATH} ${DOWNLOAD_TEMP}/index normal
        download_sig  ${DOWNLOAD_INDEX_PATH}.asc \
            ${DOWNLOAD_TEMP}/index.asc normal
    fi

    gpg_validate ${DOWNLOAD_TEMP}/index.asc

    # Parse it
    echo ""
    echo "---"
    echo "DIST\tRELEASE\tARCH\tVARIANT\tBUILD"
    echo "---"
    while read line; do
        # Basic CSV parser
        OLD_IFS=$IFS
        IFS=";"
        set -- $line
        IFS=$OLD_IFS

        [ -n "$DOWNLOAD_DIST" ] && [ "$1" != "$DOWNLOAD_DIST" ] && continue
        [ -n "$DOWNLOAD_RELEASE" ] && [ "$2" != "$DOWNLOAD_RELEASE" ] && continue
        [ -n "$DOWNLOAD_ARCH" ] && [ "$3" != "$DOWNLOAD_ARCH" ] && continue
        [ -n "$DOWNLOAD_VARIANT" ] && [ "$4" != "$DOWNLOAD_VARIANT" ] && continue
        [ -z "$5" ] || [ -z "$6" ] && continue

        echo "$1\t$2\t$3\t$4\t$5"
    done < ${DOWNLOAD_TEMP}/index
    echo "---"

    if [ "$DOWNLOAD_LIST_IMAGES" = "true" ]; then
        exit 1
    fi

    # Interactive mode
    echo ""

    if [ -z "$DOWNLOAD_DIST" ]; then
        echo -n "Distribution: "
        read DOWNLOAD_DIST
    fi

    if [ -z "$DOWNLOAD_RELEASE" ]; then
        echo -n "Release: "
        read DOWNLOAD_RELEASE
    fi

    if [ -z "$DOWNLOAD_ARCH" ]; then
        echo -n "Architecture: "
        read DOWNLOAD_ARCH
    fi

    echo ""
fi

# Setup the cache
if [ "$DOWNLOAD_MODE" = "system" ]; then
    LXC_CACHE_BASE="$LOCALSTATEDIR/cache/lxc/"
else
    LXC_CACHE_BASE="$HOME/.cache/lxc/"
fi

LXC_CACHE_PATH="$LXC_CACHE_BASE/download/$DOWNLOAD_DIST"
LXC_CACHE_PATH="$LXC_CACHE_PATH/$DOWNLOAD_RELEASE/$DOWNLOAD_ARCH/"
LXC_CACHE_PATH="$LXC_CACHE_PATH/$DOWNLOAD_VARIANT"

if [ -d "$LXC_CACHE_PATH" ]; then
    if [ "$DOWNLOAD_FLUSH_CACHE" = "true" ]; then
        echo "Flushing the cache..."
        rm -Rf $LXC_CACHE_PATH
    elif [ "$DOWNLOAD_FORCE_CACHE" = "true" ]; then
        DOWNLOAD_USE_CACHE="true"
    else
        DOWNLOAD_USE_CACHE="true"
        if [ -e "$(relevant_file expiry)" ]; then
            if [ "$(cat $(relevant_file expiry))" -lt $(date +%s) ]; then
                echo "The cached copy has expired, re-downloading..."
                DOWNLOAD_USE_CACHE="false"
            fi
        fi
    fi
fi

# Download what's needed
if [ "$DOWNLOAD_USE_CACHE" = "false" ]; then
    # Initialize GPG
    gpg_setup

    # Grab the index
    DOWNLOAD_INDEX_PATH=/meta/1.0/index-${DOWNLOAD_MODE}

    echo "Downloading the image index"
    if ! download_file ${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL} \
         ${DOWNLOAD_TEMP}/index noexit ||
       ! download_sig ${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc \
            ${DOWNLOAD_TEMP}/index.asc noexit; then
        download_file ${DOWNLOAD_INDEX_PATH} ${DOWNLOAD_TEMP}/index normal
        download_sig  ${DOWNLOAD_INDEX_PATH}.asc \
            ${DOWNLOAD_TEMP}/index.asc normal
    fi

    gpg_validate ${DOWNLOAD_TEMP}/index.asc

    # Parse it
    while read line; do
        # Basic CSV parser
        OLD_IFS=$IFS
        IFS=";"
        set -- $line
        IFS=$OLD_IFS

        if [ "$1" != "$DOWNLOAD_DIST" ] || \
           [ "$2" != "$DOWNLOAD_RELEASE" ] || \
           [ "$3" != "$DOWNLOAD_ARCH" ] || \
           [ "$4" != "$DOWNLOAD_VARIANT" ] || \
           [ -z "$6" ]; then
            continue
        fi

        DOWNLOAD_BUILD=$5
        DOWNLOAD_URL=$6
        break
    done < ${DOWNLOAD_TEMP}/index

    if [ -z "$DOWNLOAD_URL" ]; then
        echo "ERROR: Couldn't find a matching image." 1>&1
        exit 1
    fi

    if [ -d "$LXC_CACHE_PATH" ] && [ -f "$LXC_CACHE_PATH/build_id" ] && \
       [ "$(cat $LXC_CACHE_PATH/build_id)" = "$DOWNLOAD_BUILD" ]; then
        echo "The cache is already up to date."
        echo "Using image from local cache"
    else
        # Download the actual files
        echo "Downloading the rootfs"
        download_file $DOWNLOAD_URL/rootfs.tar.xz \
            ${DOWNLOAD_TEMP}/rootfs.tar.xz normal
        download_sig  $DOWNLOAD_URL/rootfs.tar.xz.asc \
             ${DOWNLOAD_TEMP}/rootfs.tar.xz.asc normal
        gpg_validate ${DOWNLOAD_TEMP}/rootfs.tar.xz.asc

        echo "Downloading the metadata"
        download_file $DOWNLOAD_URL/meta.tar.xz \
            ${DOWNLOAD_TEMP}/meta.tar.xz normal
        download_sig  $DOWNLOAD_URL/meta.tar.xz.asc \
            ${DOWNLOAD_TEMP}/meta.tar.xz.asc normal
        gpg_validate ${DOWNLOAD_TEMP}/meta.tar.xz.asc

        if [ -d $LXC_CACHE_PATH ]; then
            rm -Rf $LXC_CACHE_PATH
        fi
        mkdir -p $LXC_CACHE_PATH
        mv ${DOWNLOAD_TEMP}/rootfs.tar.xz $LXC_CACHE_PATH
        if ! tar Jxf ${DOWNLOAD_TEMP}/meta.tar.xz -C $LXC_CACHE_PATH; then
            echo "ERROR: Invalid rootfs tarball." 2>&1
            exit 1
        fi

        echo $DOWNLOAD_BUILD > $LXC_CACHE_PATH/build_id

        if [ -n "$LXC_MAPPED_UID" ] && [ "$LXC_MAPPED_UID" != "-1" ]; then
            chown -R $LXC_MAPPED_UID $LXC_CACHE_BASE >/dev/null 2>&1 || true
        fi
        if [ -n "$LXC_MAPPED_GID" ] && [ "$LXC_MAPPED_GID" != "-1" ]; then
            chgrp -R $LXC_MAPPED_GID $LXC_CACHE_BASE >/dev/null 2>&1 || true
        fi
        echo "The image cache is now ready"
    fi
else
    echo "Using image from local cache"
fi

# Unpack the rootfs
echo "Unpacking the rootfs"

EXCLUDES=""
excludelist=$(relevant_file excludes)
if [ -f "${excludelist}" ]; then
    while read line; do
        EXCLUDES="$EXCLUDES --exclude=$line"
    done < $excludelist
fi

tar  --anchored ${EXCLUDES} --numeric-owner -xpJf \
    ${LXC_CACHE_PATH}/rootfs.tar.xz -C ${LXC_ROOTFS}

mkdir -p ${LXC_ROOTFS}/dev/pts/

# Setup the configuration
configfile=$(relevant_file config)
fstab=$(relevant_file fstab)
if [ ! -e $configfile ]; then
    echo "ERROR: meta tarball is missing the configuration file" 1>&2
    exit 1
fi

## Extract all the network config entries
sed -i -e "/lxc.network/{w ${LXC_PATH}/config-network" -e "d}" \
    ${LXC_PATH}/config

## Extract any other config entry
sed -i -e "/lxc./{w ${LXC_PATH}/config-auto" -e "d}" ${LXC_PATH}/config

## Append the defaults
echo "" >> ${LXC_PATH}/config
echo "# Distribution configuration" >> ${LXC_PATH}/config
cat $configfile >> ${LXC_PATH}/config

## Add the container-specific config
echo "" >> ${LXC_PATH}/config
echo "# Container specific configuration" >> ${LXC_PATH}/config
if [ -e "${LXC_PATH}/config-auto" ]; then
    cat ${LXC_PATH}/config-auto >> ${LXC_PATH}/config
    rm ${LXC_PATH}/config-auto
fi
if [ -e "$fstab" ]; then
    echo "lxc.mount = ${LXC_PATH}/fstab" >> ${LXC_PATH}/config
fi
echo "lxc.utsname = ${LXC_NAME}" >> ${LXC_PATH}/config

## Re-add the previously removed network config
if [ -e "${LXC_PATH}/config-network" ]; then
    echo "" >> ${LXC_PATH}/config
    echo "# Network configuration" >> ${LXC_PATH}/config
    cat ${LXC_PATH}/config-network >> ${LXC_PATH}/config
    rm ${LXC_PATH}/config-network
fi

TEMPLATE_FILES="${LXC_PATH}/config"

# Setup the fstab
if [ -e $fstab ]; then
    cp ${fstab} ${LXC_PATH}/fstab
    TEMPLATE_FILES="$TEMPLATE_FILES ${LXC_PATH}/fstab"
fi

# Look for extra templates
if [ -e "$(relevant_file templates)" ]; then
    while read line; do
        fullpath=${LXC_ROOTFS}/$line
        [ ! -e "$fullpath" ] && continue
        TEMPLATE_FILES="$TEMPLATE_FILES $fullpath"
    done < $(relevant_file templates)
fi

# Replace variables in all templates
for file in $TEMPLATE_FILES; do
    [ ! -f "$file" ] && continue

    sed -i "s#LXC_NAME#$LXC_NAME#g" $file
    sed -i "s#LXC_PATH#$LXC_PATH#g" $file
    sed -i "s#LXC_ROOTFS#$LXC_ROOTFS#g" $file
    sed -i "s#LXC_TEMPLATE_CONFIG#$LXC_TEMPLATE_CONFIG#g" $file
    sed -i "s#LXC_HOOK_DIR#$LXC_HOOK_DIR#g" $file
done

if [ -n "$LXC_MAPPED_UID" ] && [ "$LXC_MAPPED_UID" != "-1" ]; then
    chown $LXC_MAPPED_UID $LXC_PATH/config $LXC_PATH/fstab >/dev/null 2>&1 || true
fi
if [ -n "$LXC_MAPPED_GID" ] && [ "$LXC_MAPPED_GID" != "-1" ]; then
    chgrp $LXC_MAPPED_GID $LXC_PATH/config $LXC_PATH/fstab >/dev/null 2>&1 || true
fi

if [ -e "$(relevant_file create-message)" ]; then
    echo ""
    echo "---"
    cat "$(relevant_file create-message)"
fi

exit 0
Commit	Line	Data
71d3a659 SG	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	LXC_TEMPLATE_CONFIG="@LXCTEMPLATECONFIG@"
	25	LXC_HOOK_DIR="@LXCHOOKDIR@"
	26	LOCALSTATEDIR="@LOCALSTATEDIR@"
	27
	28	# Defaults
	29	DOWNLOAD_DIST=
	30	DOWNLOAD_RELEASE=
	31	DOWNLOAD_ARCH=
	32	DOWNLOAD_VARIANT="default"
	33	DOWNLOAD_SERVER="images.linuxcontainers.org"
	34	DOWNLOAD_KEYID="0xBAEFF88C22F6E216"
4eb706b3	35	DOWNLOAD_KEYSERVER="hkp://pool.sks-keyservers.net"
71d3a659 SG	36	DOWNLOAD_VALIDATE="true"
71d3a659 SG	37	DOWNLOAD_FLUSH_CACHE="false"
41670b35	38	DOWNLOAD_FORCE_CACHE="false"
71d3a659 SG	39	DOWNLOAD_MODE="system"
	40	DOWNLOAD_USE_CACHE="false"
	41	DOWNLOAD_URL=
	42	DOWNLOAD_SHOW_HTTP_WARNING="true"
	43	DOWNLOAD_SHOW_GPG_WARNING="true"
b0f0932a	44	DOWNLOAD_READY_GPG="false"
71d3a659	45	DOWNLOAD_COMPAT_LEVEL=1
10a5fab6	46	DOWNLOAD_LIST_IMAGES="false"
9accc2ef	47	DOWNLOAD_BUILD=
b0f0932a	48	DOWNLOAD_INTERACTIVE="false"
71d3a659 SG	49
	50	LXC_NAME=
	51	LXC_PATH=
	52	LXC_ROOTFS=
	53	LXC_MAPPED_UID=
2133f58c	54	LXC_MAPPED_GID=
71d3a659	55
4eb706b3 SG	56	# Deal with GPG over http proxy
	57	if [ -n "${http_proxy:-}" ]; then
	58	DOWNLOAD_KEYSERVER="${DOWNLOAD_KEYSERVER}:80"
	59	fi
	60
71d3a659 SG	61	# Some useful functions
	62	cleanup() {
	63	if [ -d "$DOWNLOAD_TEMP" ]; then
	64	rm -Rf $DOWNLOAD_TEMP
	65	fi
	66	}
	67
	68	download_file() {
	69	if ! wget -q https://${DOWNLOAD_SERVER}/$1 -O $2 >/dev/null 2>&1; then
	70	if ! wget -q http://${DOWNLOAD_SERVER}/$1 -O $2 >/dev/null 2>&1; then
	71	if [ "$3" = "noexit" ]; then
	72	return 1
	73	else
fad96766	74	echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2
71d3a659 SG	75	exit 1
	76	fi
	77	elif [ "$DOWNLOAD_SHOW_HTTP_WARNING" = "true" ]; then
	78	DOWNLOAD_SHOW_HTTP_WARNING="false"
	79	echo "WARNING: Failed to download the file over HTTPs." 1>&2
	80	echo -n " The file was instead download over HTTP. " 1>&2
	81	echo "A server replay attack may be possible!" 1>&2
	82	fi
	83	fi
	84	}
	85
fad96766	86	download_sig() {
33aa351a SG	87	if ! download_file $1 $2 noexit; then
	88	if [ "$DOWNLOAD_VALIDATE" = "true" ]; then
	89	if [ "$3" = "normal" ]; then
	90	echo "ERROR: Failed to download http://${DOWNLOAD_SERVER}/$1" 1>&2
	91	exit 1
	92	else
	93	return 1
	94	fi
	95	else
	96	return 0
	97	fi
fad96766 DE	98	fi
	99	}
	100
71d3a659 SG	101	gpg_setup() {
	102	if [ "$DOWNLOAD_VALIDATE" = "false" ]; then
	103	return
	104	fi
	105
b0f0932a SG	106	if [ "$DOWNLOAD_READY_GPG" = "true" ]; then
	107	return
	108	fi
	109
71d3a659 SG	110	echo "Setting up the GPG keyring"
	111
	112	mkdir -p "$DOWNLOAD_TEMP/gpg"
	113	chmod 700 "$DOWNLOAD_TEMP/gpg"
	114	export GNUPGHOME="$DOWNLOAD_TEMP/gpg"
	115	if ! gpg --keyserver $DOWNLOAD_KEYSERVER \
	116	--recv-keys ${DOWNLOAD_KEYID} >/dev/null 2>&1; then
	117	echo "ERROR: Unable to fetch GPG key from keyserver."
	118	exit 1
	119	fi
b0f0932a SG	120
b0f0932a SG	121	DOWNLOAD_READY_GPG="true"
71d3a659 SG	122	}
	123
	124	gpg_validate() {
	125	if [ "$DOWNLOAD_VALIDATE" = "false" ]; then
	126	if [ "$DOWNLOAD_SHOW_GPG_WARNING" = "true" ]; then
	127	echo "WARNING: Running without gpg validation!" 1>&2
	128	fi
	129	DOWNLOAD_SHOW_GPG_WARNING="false"
	130	return 0
	131	fi
	132
	133	if ! gpg --verify $1 >/dev/zero 2>&1; then
	134	echo "ERROR: Invalid signature for $1" 1>&2
	135	exit 1
	136	fi
	137	}
	138
	139	in_userns() {
	140	[ -e /proc/self/uid_map ] \|\| { echo no; return; }
	141	[ "$(wc -l /proc/self/uid_map \| awk '{ print $1 }')" -eq 1 ] \|\| \
	142	{ echo yes; return; }
	143	line=$(awk '{ print $1 " " $2 " " $3 }' /proc/self/uid_map)
	144	[ "$line" = "0 0 4294967295" ] && { echo no; return; }
	145	echo yes
	146	}
	147
	148	relevant_file() {
	149	FILE_PATH="${LXC_CACHE_PATH}/$1"
	150	if [ -e "${FILE_PATH}-${DOWNLOAD_MODE}" ]; then
	151	FILE_PATH="${FILE_PATH}-${DOWNLOAD_MODE}"
	152	fi
	153	if [ -e "$FILE_PATH.${DOWNLOAD_COMPAT_LEVEL}" ]; then
	154	FILE_PATH="${FILE_PATH}.${DOWNLOAD_COMPAT_LEVEL}"
	155	fi
	156
	157	echo $FILE_PATH
	158	}
	159
	160	usage() {
	161	cat <<EOF
	162	LXC container image downloader
	163
	164	Required arguments:
	165	[ -d \| --dist <distribution> ]: The name of the distribution
	166	[ -r \| --release <release> ]: Release name/version
	167	[ -a \| --arch <architecture> ]: Architecture of the container
71d3a659 SG	168
71d3a659 SG	169	Optional arguments:
10a5fab6 SG	170	[ -h \| --help ]: This help message
10a5fab6 SG	171	[ -l \| --list ]: List all available images
71d3a659 SG	172	[ --variant <variant> ]: Variant of the image (default: "default")
	173	[ --server <server> ]: Image server (default: "images.linuxcontainers.org")
	174	[ --keyid <keyid> ]: GPG keyid (default: 0x...)
	175	[ --keyserver <keyserver> ]: GPG keyserver to use
	176	[ --no-validate ]: Disable GPG validation (not recommended)
	177	[ --flush-cache ]: Flush the local copy (if present)
9accc2ef	178	[ --force-cache ]; Force the use of the local copy even if expired
71d3a659 SG	179
	180	LXC internal arguments (do not pass manually!):
	181	[ --name <name> ]: The container name
	182	[ --path <path> ]: The path to the container
	183	[ --rootfs <rootfs> ]: The path to the container's rootfs
2133f58c SH	184	[ --mapped-uid <map> ]: A uid map (user namespaces)
2133f58c SH	185	[ --mapped-gid <map> ]: A gid map (user namespaces)
71d3a659 SG	186	EOF
	187	return 0
	188	}
	189
10a5fab6	190	options=$(getopt -o d:r:a:hl -l dist:,release:,arch:,help,list,variant:,\
c1becef2	191	server:,keyid:,no-validate,flush-cache,force-cache,name:,path:,\
2133f58c	192	rootfs:,mapped-uid:,mapped-gid: -- "$@")
71d3a659 SG	193
	194	if [ $? -ne 0 ]; then
	195	usage
	196	exit 1
	197	fi
	198	eval set -- "$options"
	199
	200	while :; do
	201	case "$1" in
10a5fab6 SG	202	-h\|--help) usage && exit 1;;
10a5fab6 SG	203	-l\|--list) DOWNLOAD_LIST_IMAGES="true"; shift 1;;
71d3a659 SG	204	-d\|--dist) DOWNLOAD_DIST=$2; shift 2;;
	205	-r\|--release) DOWNLOAD_RELEASE=$2; shift 2;;
	206	-a\|--arch) DOWNLOAD_ARCH=$2; shift 2;;
	207	--variant) DOWNLOAD_VARIANT=$2; shift 2;;
	208	--server) DOWNLOAD_SERVER=$2; shift 2;;
	209	--keyid) DOWNLOAD_KEYID=$2; shift 2;;
	210	--no-validate) DOWNLOAD_VALIDATE="false"; shift 1;;
	211	--flush-cache) DOWNLOAD_FLUSH_CACHE="true"; shift 1;;
9accc2ef	212	--force-cache) DOWNLOAD_FORCE_CACHE="true"; shift 1;;
71d3a659 SG	213	--name) LXC_NAME=$2; shift 2;;
	214	--path) LXC_PATH=$2; shift 2;;
	215	--rootfs) LXC_ROOTFS=$2; shift 2;;
	216	--mapped-uid) LXC_MAPPED_UID=$2; shift 2;;
2133f58c	217	--mapped-gid) LXC_MAPPED_GID=$2; shift 2;;
71d3a659 SG	218	*) break;;
	219	esac
	220	done
	221
	222	# Check for required binaries
	223	for bin in tar xz wget; do
	224	if ! type $bin >/dev/null 2>&1; then
	225	echo "ERROR: Missing required tool: $bin" 1>&2
	226	exit 1
	227	fi
	228	done
	229
	230	# Check for GPG
	231	if [ "$DOWNLOAD_VALIDATE" = "true" ]; then
	232	if ! type gpg >/dev/null 2>&1; then
	233	echo "ERROR: Missing recommended tool: gpg" 1>&2
	234	echo "You can workaround this by using --no-validate." 1>&2
	235	exit 1
	236	fi
	237	fi
	238
	239	# Check that we have all variables we need
	240	if [ -z "$LXC_NAME" ] \|\| [ -z "$LXC_PATH" ] \|\| [ -z "$LXC_ROOTFS" ]; then
	241	echo "ERROR: Not running through LXC." 1>&2
	242	exit 1
	243	fi
	244
	245	if [ "$(in_userns)" = "yes" ]; then
	246	if [ -z "$LXC_MAPPED_UID" ] \|\| [ "$LXC_MAPPED_UID" = "-1" ]; then
	247	echo "ERROR: In a user namespace without a map." 1>&2
	248	exit 1
	249	fi
	250	DOWNLOAD_MODE="user"
	251	fi
	252
b0f0932a SG	253	if [ -z "$DOWNLOAD_DIST" ] \|\| [ -z "$DOWNLOAD_RELEASE" ] \|\| \
	254	[ -z "$DOWNLOAD_ARCH" ]; then
	255	DOWNLOAD_INTERACTIVE="true"
71d3a659 SG	256	fi
	257
	258	# Trap all exit signals
	259	trap cleanup EXIT HUP INT TERM
843a5874 SG	260
	261	if ! type mktemp >/dev/null 2>&1; then
	262	DOWNLOAD_TEMP=/tmp/lxc-download.$$
	263	mkdir -p $DOWNLOAD_TEMP
	264	else
	265	DOWNLOAD_TEMP=$(mktemp -d)
	266	fi
71d3a659	267
10a5fab6	268	# Simply list images
b0f0932a SG	269	if [ "$DOWNLOAD_LIST_IMAGES" = "true" ] \|\| \
b0f0932a SG	270	[ "$DOWNLOAD_INTERACTIVE" = "true" ]; then
10a5fab6 SG	271	# Initialize GPG
	272	gpg_setup
	273
	274	# Grab the index
	275	DOWNLOAD_INDEX_PATH=/meta/1.0/index-${DOWNLOAD_MODE}
	276
	277	echo "Downloading the image index"
	278	if ! download_file ${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL} \
	279	${DOWNLOAD_TEMP}/index noexit \|\|
	280	! download_sig ${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc \
	281	${DOWNLOAD_TEMP}/index.asc noexit; then
	282	download_file ${DOWNLOAD_INDEX_PATH} ${DOWNLOAD_TEMP}/index normal
	283	download_sig ${DOWNLOAD_INDEX_PATH}.asc \
	284	${DOWNLOAD_TEMP}/index.asc normal
	285	fi
	286
	287	gpg_validate ${DOWNLOAD_TEMP}/index.asc
	288
	289	# Parse it
	290	echo ""
	291	echo "---"
	292	echo "DIST\tRELEASE\tARCH\tVARIANT\tBUILD"
	293	echo "---"
	294	while read line; do
	295	# Basic CSV parser
	296	OLD_IFS=$IFS
	297	IFS=";"
	298	set -- $line
	299	IFS=$OLD_IFS
	300
	301	[ -n "$DOWNLOAD_DIST" ] && [ "$1" != "$DOWNLOAD_DIST" ] && continue
	302	[ -n "$DOWNLOAD_RELEASE" ] && [ "$2" != "$DOWNLOAD_RELEASE" ] && continue
	303	[ -n "$DOWNLOAD_ARCH" ] && [ "$3" != "$DOWNLOAD_ARCH" ] && continue
	304	[ -n "$DOWNLOAD_VARIANT" ] && [ "$4" != "$DOWNLOAD_VARIANT" ] && continue
	305	[ -z "$5" ] \|\| [ -z "$6" ] && continue
	306
	307	echo "$1\t$2\t$3\t$4\t$5"
	308	done < ${DOWNLOAD_TEMP}/index
	309	echo "---"
	310
b0f0932a SG	311	if [ "$DOWNLOAD_LIST_IMAGES" = "true" ]; then
	312	exit 1
	313	fi
	314
	315	# Interactive mode
	316	echo ""
	317
	318	if [ -z "$DOWNLOAD_DIST" ]; then
	319	echo -n "Distribution: "
	320	read DOWNLOAD_DIST
	321	fi
	322
	323	if [ -z "$DOWNLOAD_RELEASE" ]; then
	324	echo -n "Release: "
	325	read DOWNLOAD_RELEASE
	326	fi
	327
	328	if [ -z "$DOWNLOAD_ARCH" ]; then
	329	echo -n "Architecture: "
	330	read DOWNLOAD_ARCH
	331	fi
	332
	333	echo ""
10a5fab6 SG	334	fi
10a5fab6 SG	335
71d3a659 SG	336	# Setup the cache
71d3a659 SG	337	if [ "$DOWNLOAD_MODE" = "system" ]; then
b56661fe	338	LXC_CACHE_BASE="$LOCALSTATEDIR/cache/lxc/"
71d3a659 SG	339	else
71d3a659 SG	340	LXC_CACHE_BASE="$HOME/.cache/lxc/"
71d3a659 SG	341	fi
71d3a659 SG	342
b56661fe SG	343	LXC_CACHE_PATH="$LXC_CACHE_BASE/download/$DOWNLOAD_DIST"
	344	LXC_CACHE_PATH="$LXC_CACHE_PATH/$DOWNLOAD_RELEASE/$DOWNLOAD_ARCH/"
	345	LXC_CACHE_PATH="$LXC_CACHE_PATH/$DOWNLOAD_VARIANT"
	346
71d3a659 SG	347	if [ -d "$LXC_CACHE_PATH" ]; then
	348	if [ "$DOWNLOAD_FLUSH_CACHE" = "true" ]; then
	349	echo "Flushing the cache..."
	350	rm -Rf $LXC_CACHE_PATH
9accc2ef SG	351	elif [ "$DOWNLOAD_FORCE_CACHE" = "true" ]; then
9accc2ef SG	352	DOWNLOAD_USE_CACHE="true"
71d3a659 SG	353	else
	354	DOWNLOAD_USE_CACHE="true"
	355	if [ -e "$(relevant_file expiry)" ]; then
	356	if [ "$(cat $(relevant_file expiry))" -lt $(date +%s) ]; then
	357	echo "The cached copy has expired, re-downloading..."
	358	DOWNLOAD_USE_CACHE="false"
71d3a659 SG	359	fi
	360	fi
	361	fi
	362	fi
	363
	364	# Download what's needed
	365	if [ "$DOWNLOAD_USE_CACHE" = "false" ]; then
	366	# Initialize GPG
	367	gpg_setup
	368
	369	# Grab the index
	370	DOWNLOAD_INDEX_PATH=/meta/1.0/index-${DOWNLOAD_MODE}
	371
	372	echo "Downloading the image index"
	373	if ! download_file ${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL} \
	374	${DOWNLOAD_TEMP}/index noexit \|\|
33aa351a	375	! download_sig ${DOWNLOAD_INDEX_PATH}.${DOWNLOAD_COMPAT_LEVEL}.asc \
71d3a659 SG	376	${DOWNLOAD_TEMP}/index.asc noexit; then
71d3a659 SG	377	download_file ${DOWNLOAD_INDEX_PATH} ${DOWNLOAD_TEMP}/index normal
fad96766	378	download_sig ${DOWNLOAD_INDEX_PATH}.asc \
33aa351a	379	${DOWNLOAD_TEMP}/index.asc normal
71d3a659 SG	380	fi
	381
	382	gpg_validate ${DOWNLOAD_TEMP}/index.asc
	383
	384	# Parse it
	385	while read line; do
	386	# Basic CSV parser
	387	OLD_IFS=$IFS
	388	IFS=";"
	389	set -- $line
	390	IFS=$OLD_IFS
	391
	392	if [ "$1" != "$DOWNLOAD_DIST" ] \|\| \
	393	[ "$2" != "$DOWNLOAD_RELEASE" ] \|\| \
	394	[ "$3" != "$DOWNLOAD_ARCH" ] \|\| \
	395	[ "$4" != "$DOWNLOAD_VARIANT" ] \|\| \
	396	[ -z "$6" ]; then
	397	continue
	398	fi
	399
9accc2ef	400	DOWNLOAD_BUILD=$5
71d3a659 SG	401	DOWNLOAD_URL=$6
	402	break
	403	done < ${DOWNLOAD_TEMP}/index
	404
	405	if [ -z "$DOWNLOAD_URL" ]; then
	406	echo "ERROR: Couldn't find a matching image." 1>&1
	407	exit 1
	408	fi
	409
9accc2ef SG	410	if [ -d "$LXC_CACHE_PATH" ] && [ -f "$LXC_CACHE_PATH/build_id" ] && \
	411	[ "$(cat $LXC_CACHE_PATH/build_id)" = "$DOWNLOAD_BUILD" ]; then
	412	echo "The cache is already up to date."
	413	echo "Using image from local cache"
	414	else
	415	# Download the actual files
	416	echo "Downloading the rootfs"
	417	download_file $DOWNLOAD_URL/rootfs.tar.xz \
	418	${DOWNLOAD_TEMP}/rootfs.tar.xz normal
	419	download_sig $DOWNLOAD_URL/rootfs.tar.xz.asc \
	420	${DOWNLOAD_TEMP}/rootfs.tar.xz.asc normal
	421	gpg_validate ${DOWNLOAD_TEMP}/rootfs.tar.xz.asc
	422
	423	echo "Downloading the metadata"
	424	download_file $DOWNLOAD_URL/meta.tar.xz \
	425	${DOWNLOAD_TEMP}/meta.tar.xz normal
	426	download_sig $DOWNLOAD_URL/meta.tar.xz.asc \
	427	${DOWNLOAD_TEMP}/meta.tar.xz.asc normal
	428	gpg_validate ${DOWNLOAD_TEMP}/meta.tar.xz.asc
	429
	430	if [ -d $LXC_CACHE_PATH ]; then
	431	rm -Rf $LXC_CACHE_PATH
	432	fi
	433	mkdir -p $LXC_CACHE_PATH
	434	mv ${DOWNLOAD_TEMP}/rootfs.tar.xz $LXC_CACHE_PATH
	435	if ! tar Jxf ${DOWNLOAD_TEMP}/meta.tar.xz -C $LXC_CACHE_PATH; then
	436	echo "ERROR: Invalid rootfs tarball." 2>&1
	437	exit 1
	438	fi
71d3a659	439
9accc2ef SG	440	echo $DOWNLOAD_BUILD > $LXC_CACHE_PATH/build_id
	441
	442	if [ -n "$LXC_MAPPED_UID" ] && [ "$LXC_MAPPED_UID" != "-1" ]; then
0d656b05	443	chown -R $LXC_MAPPED_UID $LXC_CACHE_BASE >/dev/null 2>&1 \|\| true
9accc2ef	444	fi
2133f58c SH	445	if [ -n "$LXC_MAPPED_GID" ] && [ "$LXC_MAPPED_GID" != "-1" ]; then
	446	chgrp -R $LXC_MAPPED_GID $LXC_CACHE_BASE >/dev/null 2>&1 \|\| true
	447	fi
9accc2ef	448	echo "The image cache is now ready"
71d3a659	449	fi
71d3a659 SG	450	else
	451	echo "Using image from local cache"
	452	fi
	453
	454	# Unpack the rootfs
	455	echo "Unpacking the rootfs"
fecf101c SG	456
	457	EXCLUDES=""
	458	excludelist=$(relevant_file excludes)
	459	if [ -f "${excludelist}" ]; then
	460	while read line; do
	461	EXCLUDES="$EXCLUDES --exclude=$line"
	462	done < $excludelist
71d3a659 SG	463	fi
71d3a659 SG	464
fecf101c SG	465	tar --anchored ${EXCLUDES} --numeric-owner -xpJf \
	466	${LXC_CACHE_PATH}/rootfs.tar.xz -C ${LXC_ROOTFS}
	467
	468	mkdir -p ${LXC_ROOTFS}/dev/pts/
	469
71d3a659 SG	470	# Setup the configuration
	471	configfile=$(relevant_file config)
	472	fstab=$(relevant_file fstab)
	473	if [ ! -e $configfile ]; then
	474	echo "ERROR: meta tarball is missing the configuration file" 1>&2
	475	exit 1
	476	fi
	477
	478	## Extract all the network config entries
	479	sed -i -e "/lxc.network/{w ${LXC_PATH}/config-network" -e "d}" \
	480	${LXC_PATH}/config
	481
	482	## Extract any other config entry
	483	sed -i -e "/lxc./{w ${LXC_PATH}/config-auto" -e "d}" ${LXC_PATH}/config
	484
	485	## Append the defaults
	486	echo "" >> ${LXC_PATH}/config
	487	echo "# Distribution configuration" >> ${LXC_PATH}/config
	488	cat $configfile >> ${LXC_PATH}/config
	489
	490	## Add the container-specific config
	491	echo "" >> ${LXC_PATH}/config
	492	echo "# Container specific configuration" >> ${LXC_PATH}/config
	493	if [ -e "${LXC_PATH}/config-auto" ]; then
	494	cat ${LXC_PATH}/config-auto >> ${LXC_PATH}/config
	495	rm ${LXC_PATH}/config-auto
	496	fi
	497	if [ -e "$fstab" ]; then
	498	echo "lxc.mount = ${LXC_PATH}/fstab" >> ${LXC_PATH}/config
	499	fi
	500	echo "lxc.utsname = ${LXC_NAME}" >> ${LXC_PATH}/config
	501
	502	## Re-add the previously removed network config
	503	if [ -e "${LXC_PATH}/config-network" ]; then
	504	echo "" >> ${LXC_PATH}/config
	505	echo "# Network configuration" >> ${LXC_PATH}/config
	506	cat ${LXC_PATH}/config-network >> ${LXC_PATH}/config
	507	rm ${LXC_PATH}/config-network
	508	fi
	509
	510	TEMPLATE_FILES="${LXC_PATH}/config"
	511
	512	# Setup the fstab
	513	if [ -e $fstab ]; then
	514	cp ${fstab} ${LXC_PATH}/fstab
	515	TEMPLATE_FILES="$TEMPLATE_FILES ${LXC_PATH}/fstab"
	516	fi
	517
	518	# Look for extra templates
	519	if [ -e "$(relevant_file templates)" ]; then
	520	while read line; do
	521	fullpath=${LXC_ROOTFS}/$line
	522	[ ! -e "$fullpath" ] && continue
	523	TEMPLATE_FILES="$TEMPLATE_FILES $fullpath"
	524	done < $(relevant_file templates)
	525	fi
	526
	527	# Replace variables in all templates
	528	for file in $TEMPLATE_FILES; do
fad96766	529	[ ! -f "$file" ] && continue
71d3a659 SG	530
	531	sed -i "s#LXC_NAME#$LXC_NAME#g" $file
	532	sed -i "s#LXC_PATH#$LXC_PATH#g" $file
	533	sed -i "s#LXC_ROOTFS#$LXC_ROOTFS#g" $file
	534	sed -i "s#LXC_TEMPLATE_CONFIG#$LXC_TEMPLATE_CONFIG#g" $file
	535	sed -i "s#LXC_HOOK_DIR#$LXC_HOOK_DIR#g" $file
	536	done
	537
	538	if [ -n "$LXC_MAPPED_UID" ] && [ "$LXC_MAPPED_UID" != "-1" ]; then
0d656b05	539	chown $LXC_MAPPED_UID $LXC_PATH/config $LXC_PATH/fstab >/dev/null 2>&1 \|\| true
71d3a659	540	fi
2133f58c SH	541	if [ -n "$LXC_MAPPED_GID" ] && [ "$LXC_MAPPED_GID" != "-1" ]; then
	542	chgrp $LXC_MAPPED_GID $LXC_PATH/config $LXC_PATH/fstab >/dev/null 2>&1 \|\| true
	543	fi
71d3a659 SG	544
	545	if [ -e "$(relevant_file create-message)" ]; then
	546	echo ""
	547	echo "---"
	548	cat "$(relevant_file create-message)"
	549	fi
	550
	551	exit 0