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#!/bin/bash
# Needs full bash
#
# Script to be called by systemd
#
# Downloads and appends addons per sqfs/aufs.
#
######################################################################################
#
# Two modes for this script:
# - without any arguments, it will just go through the list of addons to
# setup as given through the OpenSLX configuration file
# - with an argument, it will setup the addon given as $1
#
#
######################################################################################
# read global OpenSLX config
. /opt/openslx/config || { echo "Could not source config!"; exit 23; }
[ -z "${SLX_ADDONS}" ] && { echo "No addons configured. Nothing to do :-)."; exit 0; }
# source functions.inc for the download function
. /opt/openslx/etc/functions.inc || { echo "functions.inc not found!"; exit 1337; }
# quick fix for the missing FUTURE_ROOT needed by /opt/openslx/etc/functions.inc
export FUTURE_ROOT="/"
# read openslx config, especially servers given by SLX_KCL_SERVERS and SLX_CONFIG_SERVERS
if [ -z "${SLX_CONFIG_SERVERS}" ]; then
echo "SLX_CONFIG_SERVERS is not set in /opt/openslx/config. Will only try the base servers from the cmdline."
[ -z "${SLX_KCL_SERVERS}" ] && SLX_KCL_SERVERS=$(read_from_cmdline "slxsrv")
fi
# read base slx servers from cmdline
SLX_BASE_PATH=$(read_from_cmdline "slxbase")
SLX_BASE_MNT="/opt/openslx/mnt"
SYS_TMP="/tmp/addons"
mkdir -p "$SYS_TMP" || { echo "Failed to create $SYS_TMP"; exit 1; }
######################################################################################
#
# NO ARGUMENTS -> LOOP OVER ALL ADDONS
#
if [ $# -eq 0 ]; then
for ADDON in ${SLX_ADDONS}; do
systemctl start "setup-slx-addon@$ADDON" &
done
fi
######################################################################################
#
# WITH ARGUMENTS -> SETUP ADDON
#
if [ $# -eq 1 ]; then
ADDON="$1"
# sanity check
[[ ! "$SLX_ADDONS" == *"$ADDON"* ]] && \
{ echo "$ADDON is not listed in SLX_ADDONS of your config file. Skipping it."; exit 1; }
# download the addon from the given URL
ADDON_TARGET_PATH="${SYS_TMP}/$(basename "$ADDON").sqfs"
if ! download "${SLX_BASE_PATH}/${ADDON}.sqfs" "${ADDON_TARGET_PATH}"; then
slxlog --echo "addon-download" "Download of '${SLX_BASE_PATH}/${ADDON}.sqfs' failed."
exit 1
fi
# now mount it to $SLX_MNT/<addon-name>
ADDON_MOUNT_POINT="${SLX_BASE_MNT}/$(basename "$ADDON")"
mkdir -p "$ADDON_MOUNT_POINT"
mount -t squashfs "$ADDON_TARGET_PATH" "$ADDON_MOUNT_POINT" || \
{ slxlog --echo "addon-mount" "Failed to mount $ADDON_TARGET_PATH."; exit 1; }
# now append it to /
echo "Appending ${ADDON_MOUNT_POINT} to /"
if ! mount -o "remount,append:${ADDON_MOUNT_POINT}=ro" / ; then
slxlog --echo "Failed to append ${ADDON_MOUNT_POINT} to the aufs. Cleaning up..."
umount -l ${ADDON_MOUNT_POINT} || echo "Could not unmount ${ADDON_MOUNT_POINT}!"
exit 1
fi
# Run post-hook if available
if [ -x "$ADDON_MOUNT_POINT/addon-init" ]; then
"$ADDON_MOUNT_POINT/addon-init" || \
slxlog --echo "addon-init" "Warning: Could not execute addon-init of $ADDON"
fi
fi
[ $# -gt 1 ] && { echo "Error - $0 only takes no or one argument. $# given." && exit 1; }
exit 0
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