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#!/usr/bin/env bash
#
# Stage4 addons setup script
#
###############################################################################
# Support stage4 addons residing under '/opt/openslx/addons'.
# This script will loop over all addons found, in the form of
# directories containing directory structures relative to '/'
#
# Additionally addons are expected to provide:
# * <addon_dir>/addon-required -> script to check whether the
# addon should be installed (exit 0) or not (exit 1).
#
# * <addon_dir>/opt/openslx/etc/<addon_name>.whiteout -> list of files
# that were removed during the addon installation and thus need to be
# removed after the addon was installed.
#
# * <addon_dir>/opt/openslx/etc/<addon_name> ld.so.cache -> ld cache containing
# the newly installed libraries. CAVE: multiple addons -> ld cache combination
#
### CURRENTLY NOT EXECUTED
# * <addon_dir>/addon-init -> script that will be automatically
# be executed after the addon was installed.
# NOTE: question remains if this should be done within stage3
# or by chroot'ing into the stage4 before executing it.
### CURRENTLY NOT EXECUTED: Since whiteouts could be handled for _all_addons
type emergency_shell >/dev/null 2>&1 || . /lib/dracut-lib.sh
# Check if we even have any addons to process
if [ ! -d "$NEWROOT/opt/openslx/addons" ]; then
info "No stage4 addons found."
return 0
fi
setup_addons() {
local ADDONS_DIR="$NEWROOT/opt/openslx/addons/"
cd "$ADDONS_DIR" || return 1
for ADDON in *; do
if ! setup_addon "$ADDON"; then
info "Failed to setup $ADDON"
fi
done
}
setup_addon() {
[ -z "$1" -o ! -d "$ADDONS_DIR/$1" ] && return 1
local ADDON="$1"
cd "$ADDONS_DIR/$ADDON" || return 1
if ! bash addon-required 2>&1 ; then
info "'$ADDONS_DIR/$ADDON/addon-required' missing or returned non-zero, skipping..."
return 1
fi
for entry in $(find * -not -wholename "addon-*" 2>/dev/null); do
if [ -d "$entry" ]; then
[ -d "/$entry" ] || mkdir -p "/${entry}"
continue
fi
local dir=${entry%/*}
[ -d "$NEWROOT/$dir" ] || mkdir -p "$NEWROOT/$dir"
if [ -f "$entry" -a ! -L "$entry" ]; then
if [ ! -e "$NEWROOT/${entry}" ] || ! diff -q "$entry" "$NEWROOT/${entry}"; then
mv -f -- "$entry" "$NEWROOT/${entry}"
fi
else
# either block dev, char dev or a symlink, just overwrite them "blindly"
mv -f -- "$entry" "$NEWROOT/${entry}"
fi
done
# post merge: remove whiteouts from filesystem
for WHITEOUT in "$NEWROOT/opt/openslx/etc/"*.whiteout; do
[ -e "$WHITEOUT" ] || continue
while read line; do
rm -f "${NEWROOT}/${line}"
done < "$WHITEOUT"
done
# finally update ld.so.cache expected to be under /opt/openslx/etc/<addon_name>.ld.so.cache
# NOTE: if we have more than one addon in the future, we need to be extra
# careful with prebuilt ld.caches since they need to match *ALL* addons
local ADDON_LD_CACHE="$NEWROOT/opt/openslx/etc/$ADDON.ld.so.cache"
if [ ! -e "$ADDON_LD_CACHE" ] || ! mv -f -- "$ADDON_LD_CACHE" "$NEWROOT/etc/ld.so.cache" ; then
# Using prebuilt ld cache failed, try hard to find a ldconfig...
for LDCONFIG in "$(type -p ldconfig 2>/dev/null)" "${NEWROOT}/sbin/ldconfig.real"; do
if [ -x "$LDCONFIG" ] && "$LDCONFIG" -r "$NEWROOT"; then
return 0
fi
done
# try with chroot if we have it
local CHROOT_PATH="$(type -p chroot 2>/dev/null)"
if [ -x "$CHROOT_PATH" ] && "$CHROOT_PATH" "$NEWROOT" ldconfig; then
return 0
fi
# very bad indeed, libraries won't be registered in the cache ...
warn "Failed to find 'ldconfig' to rebuild the addon's missing ld.so.cache..."
return 1
fi
}
if ! setup_addons; then
warn "Failed to fully setup some addons! They will likely malfunction..."
fi
|
