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#!/bin/bash
check() {
require_kernel_modules loop overlay || return 1
return 255
}
depends() {
echo "systemd-initrd"
return 0
}
squash_get_handler() {
local _module _handler
local -a _modules=(squash-squashfs squash-erofs)
for _module in "${_modules[@]}"; do
if dracut_module_included "$_module"; then
_handler="$_module"
break
fi
done
if [[ -z $_handler ]]; then
dfatal "Cannot include squash-lib directly. It requires one of: ${_modules[*]}"
return 1
fi
echo "$_handler"
}
squash_install() {
local _busybox _dir
# verify that there is a valid handler before doing anything
squash_get_handler > /dev/null || return 1
_busybox=$(find_binary busybox)
# Create mount points for squash loader and basic directories
mkdir -p "$initdir"/squash
for _dir in squash usr/bin usr/sbin usr/lib; do
mkdir -p "$squashdir/$_dir"
[[ $_dir == usr/* ]] && ln_r "/$_dir" "${_dir#usr}"
done
# Install required modules and binaries for the squash image init script.
if [[ $_busybox ]]; then
module_install "busybox"
else
DRACUT_RESOLVE_DEPS=1 inst_multiple sh mount modprobe mkdir switch_root grep umount
# libpthread workaround: pthread_cancel wants to dlopen libgcc_s.so
inst_libdir_file -o "libgcc_s.so*"
# FIPS workaround for Fedora/RHEL: libcrypto needs libssl when FIPS is enabled
[[ $DRACUT_FIPS_MODE ]] && inst_libdir_file -o "libssl.so*"
fi
hostonly="" instmods "loop" "overlay"
dracut_kernel_post
# Install squash image init script.
inst_simple "$moddir"/init-squash.sh /init
# make sure that library links are correct and up to date for squash loader
build_ld_cache
}
squash_installpost() {
local _file _handler
# this shouldn't happen but...
# ...better safe than deleting your rootfs
if [[ -z $initdir ]]; then
#shellcheck disable=SC2016
dfatal '$initdir not set. Something went terribly wrong.'
exit 1
fi
_handler=$(squash_get_handler)
[[ -n $_handler ]] || return 1
DRACUT_SQUASH_POST_INST=1 module_install "$_handler"
# Rescue the dracut spec files so dracut rebuild and lsinitrd can work
for _file in "$initdir"/usr/lib/dracut/*; do
[[ -f $_file ]] || continue
DRACUT_RESOLVE_DEPS=1 dstdir=$squashdir inst "$_file" "${_file#"$initdir"}"
done
# Remove everything that got squashed into the image
for _file in "$initdir"/*; do
[[ $_file == "$squashdir" ]] && continue
rm -rf "$_file"
done
mv "$squashdir"/* "$initdir"
}
# due to this installation step below, this dracut module needs to be ordered to be the absolute last one
install() {
if [[ $DRACUT_SQUASH_POST_INST ]]; then
squash_installpost
else
dstdir="$squashdir" squash_install
fi
}
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