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# -*- shell-script -*-

catenate_cpiogz() {
	# Sanity check
	if [ ! -e "${1}" ]; then
		echo "W: catenate_cpiogz: arg1='${1}' does not exist." >&2
		return
	fi

	cat "${1}" >>"${__TMPCPIOGZ}"
}

prepend_earlyinitramfs() {
	# Sanity check
	if [ ! -e "${1}" ]; then
		echo "W: prepend_earlyinitramfs: arg1='${1}' does not exist." >&2
		return
	fi

	cat "${1}" >>"${__TMPEARLYCPIO}"
}

# force_load module [args...]
force_load()
{
	manual_add_modules "$1"
	echo "${@}" >>"${DESTDIR}/conf/modules"
}

# Takes a file containing a list of modules to be added as an
# argument, figures out dependancies, and adds them.
#
# Input file syntax:
#
#   # comment
#   modprobe_module_name [args ...]
#   [...]
#
add_modules_from_file()
{
	# Sanity check
	if [ ! -e "${1}" ]; then
		echo "W: add_modules_from_file: arg1='${1}' does not exist." >&2
		return
	fi

	grep '^[^#]' ${1} | while read module args; do
		[ -n "$module" ] || continue
		force_load "${module}" "${args}"
	done
}

# Is this module available?
have_module()
{
	modprobe --set-version="${version}" --ignore-install \
		--show-depends "${1}" >/dev/null 2>&1
}

# Add dependent modules + eventual firmware
manual_add_modules()
{
	local prefix kmod options firmware

	if [ $# -eq 0 ]; then
		return
	fi

	# modprobe --ignore-install inhibits processing of 'install'
	# configuration lines, so that instead we will see 'insmod
	# module.ko' as we want.  However it also means that 'softdep'
	# configuration lines and embedded softdep information is not
	# processed.  So we run twice, with and without this option.
	{ modprobe --all --set-version="${version}" --ignore-install --quiet --show-depends "$@";
	  modprobe --all --set-version="${version}" --quiet --show-depends "$@"; } |
	while read prefix kmod options ; do
		if [ "${prefix}" != "insmod" ]; then
			continue
		fi

		copy_file module "${kmod}" || continue

		# Add required firmware
		for firmware in $(modinfo -k "${version}" -F firmware "${kmod}"); do
			if [ -e "${DESTDIR}/lib/firmware/${firmware}" ] \
			|| [ -e "${DESTDIR}/lib/firmware/${version}/${firmware}" ]; then
				continue
			fi

			# Only print warning for missing fw of loaded module
			# or forced loaded module
			if [ ! -e "/lib/firmware/${firmware}" ] \
			&& [ ! -e "/lib/firmware/${version}/${firmware}" ] ; then
				# Only warn about missing firmware if
				# /proc/modules exists
				if [ ! -e /proc/modules ] ; then
					continue
				fi

				kmod_modname="${kmod##*/}"
				kmod_modname="${kmod_modname%.ko}"
				if grep -q "^$kmod_modname\\>" /proc/modules "${CONFDIR}/modules"; then
					echo "W: Possible missing firmware /lib/firmware/${firmware} for module $(basename ${kmod} .ko)" >&2
				fi
				continue
			fi

			if [ -e "/lib/firmware/${version}/${firmware}" ]; then
				copy_file firmware \
					"/lib/firmware/${version}/${firmware}"
			else
				copy_file firmware "/lib/firmware/${firmware}"
			fi
		done
	done
}

# $1 = file type (for logging)
# $2 = file to copy to ramdisk
# $3 (optional) Name for the file on the ramdisk
# Location of the image dir is assumed to be $DESTDIR
# If the target exists, we leave it and return 1.
# On any other error, we return >1.
copy_file() {
	local type src target link_target

	type="${1}"
	src="${2}"
	target="${3:-$2}"

	[ -f "${src}" ] || return 2

	if [ -d "${DESTDIR}/${target}" ]; then
		target="${target}/${src##*/}"
	fi

	# check if already copied
	[ -e "${DESTDIR}/${target}" ] && return 1

	#FIXME: inst_dir
	mkdir -p "${DESTDIR}/${target%/*}"

	if [ -h "${src}" ]; then
		# We don't need to replicate a chain of links completely;
		# just link directly to the ultimate target
		link_target="$(readlink -f "${src}")" || return $(($? + 1))

		if [ "${link_target}" != "${target}" ]; then
			[ "${verbose}" = "y" ] && echo "Adding ${type}-link ${src}"

			# Create a relative link so it always points
			# to the right place
			ln -rs "${DESTDIR}/${link_target}" "${DESTDIR}/${target}"
		fi

		# Copy the link target if it doesn't already exist
		src="${link_target}"
		target="${link_target}"
		[ -e "${DESTDIR}/${target}" ] && return 0
		mkdir -p "${DESTDIR}/${target%/*}"
	fi

	[ "${verbose}" = "y" ] && echo "Adding ${type} ${src}"

	cp -pP "${src}" "${DESTDIR}/${target}" || return $(($? + 1))
}

# $1 = executable to copy to ramdisk, with library dependencies
# $2 (optional) Name for the file on the ramdisk
# Location of the image dir is assumed to be $DESTDIR
# We never overwrite the target if it exists.
copy_exec() {
	local src target x nonoptlib ret

	src="${1}"
	target="${2:-$1}"

	copy_file binary "${src}" "${target}" || return $(($? - 1))

	# Copy the dependant libraries
	for x in $(ldd "${src}" 2>/dev/null | sed -e '
		/\//!d;
		/linux-gate/d;
		/=>/ {s/.*=>[[:blank:]]*\([^[:blank:]]*\).*/\1/};
		s/[[:blank:]]*\([^[:blank:]]*\) (.*)/\1/' 2>/dev/null); do

		# Try to use non-optimised libraries where possible.
		# We assume that all HWCAP libraries will be in tls,
		# sse2, vfp or neon.
		nonoptlib=$(echo "${x}" | sed -e 's#/lib/\([^/]*/\)\?\(tls\|i686\|sse2\|neon\|vfp\).*/\(lib.*\)#/lib/\1\3#')
		nonoptlib=$(echo "${nonoptlib}" | sed -e 's#-linux-gnu/\(tls\|i686\|sse2\|neon\|vfp\).*/\(lib.*\)#-linux-gnu/\2#')

		if [ -e "${nonoptlib}" ]; then
			x="${nonoptlib}"
		fi

		# Handle common dlopen() dependency (Debian bug #950254)
		case "${x}" in
		*/libpthread.so.*)
			copy_exec "${x%/*}/libgcc_s.so.1" || copy_exec "${x%/*}/../libgcc_s.so.1" || return
			;;
		esac

		copy_file library "${x}" || {
			ret=$?
			[ ${ret} = 1 ] || return $((ret - 1))
		}
	done
}

# Copy entire subtrees to the initramfs
copy_modules_dir()
{
	local kmod exclude
	local modules=
	local dir="$1"
	shift

	if ! [ -d "${MODULESDIR}/${dir}" ]; then
		return;
	fi
	if [ "${verbose}" = "y" ]; then
		echo "Copying module directory ${dir}"
		if [ $# -ge 1 ]; then
			echo "(excluding $*)"
		fi
	fi
	while [ $# -ge 1 ]; do
		exclude="${exclude:-} -name $1 -prune -o "
		shift
	done
	for kmod in $(find "${MODULESDIR}/${dir}" ${exclude:-} -name '*.ko' -printf '%f\n'); do
		modules="$modules ${kmod%.ko}"
	done
	manual_add_modules $modules
}

# walk /sys for relevant modules
sys_walk_mod_add()
{
	local driver_path module device_path modalias
	device_path="$1"

	while [ "${device_path}" != "/sys" ]; do
		# device modalias
		if [ -e "${device_path}/modalias" ]; then
			modalias=$(cat "${device_path}/modalias")
			if [ -n "${modalias}" ]; then
				manual_add_modules "${modalias}"
			fi
		fi

		# current driver module
		driver_path="$(readlink -f ${device_path}/driver/module)"
		if [ -e "$driver_path" ]; then
			module="$(basename $(readlink -f $driver_path))"
			if [ -n "${module}" ]; then
				manual_add_modules "${module}"
			fi
		fi

		device_path="$(dirname ${device_path})"
	done
}

nvme_dev_sys_walk_mod_add()
{
	local dev_sys_path component nvme_sys_path
	dev_sys_path="$(readlink -f "$1")"
	if ! echo "$dev_sys_path" | grep -q "nvme-subsys"; then
		return
	fi
	for component in "$dev_sys_path"/nvme* ; do
		if [ -L "$component" ] ; then
			nvme_sys_path=$(readlink -f "$component")
			sys_walk_mod_add "$nvme_sys_path"
		fi
	done
}

block_dev_sys_walk_mod_add()
{
	local dev_sys_path disk_sys_path component

	# Resolve symlink so sys_walk_mod_add can walk up the hierarchy
	dev_sys_path="$(readlink -f "$1")"

	# Find whole disk from partition
	if grep -q "^DEVTYPE=partition$" "$dev_sys_path/uevent"; then
		disk_sys_path="$dev_sys_path/.."
	else
		disk_sys_path="$dev_sys_path"
	fi

	# Iterate over component of a layered device
	ls -1 "$disk_sys_path/slaves" | while read component; do
		block_dev_sys_walk_mod_add "$disk_sys_path/slaves/$component"
	done
	nvme_dev_sys_walk_mod_add "$disk_sys_path/device"

	sys_walk_mod_add ${dev_sys_path}
}

block_dev_mod_add()
{
	local dev_node dev_num dev_sys_path
	dev_node="$1"

	# Look up device number and convert to decimal as it appears in sysfs
	dev_num="$(stat -L -c %t:%T "$dev_node")"
	dev_num="$((0x${dev_num%:*})):$((0x${dev_num#*:}))"

	# Look up device in sysfs
	dev_sys_path="/sys/dev/block/$dev_num"
	if [ ! -d "$dev_sys_path" ]; then
		echo "mkinitramfs: for device ${dev_node} missing ${dev_sys_path}" >&2
		echo "mkinitramfs: workaround is MODULES=most" >&2
		echo "mkinitramfs: Error please report the bug" >&2
		exit 1
	fi

	block_dev_sys_walk_mod_add "$dev_sys_path"
}

# Copy all loaded or built-in modules matching the given pattern.
# Pattern mustn't include directory or '.ko' suffix but should use
# '[-_]' to allow for differences in naming between /sys/module and
# modules.builtin.
add_loaded_modules()
{
	local pattern="$1"
	local module
	local builtin=/lib/modules/$(uname -r)/modules.builtin

	for module in /sys/module/$pattern; do
		if [ -d "$module" ]; then
			manual_add_modules $(basename $module)
		fi
	done
	if [ -f $builtin ]; then
		while read module; do
			case "$module" in
			*/$pattern.ko)
				manual_add_modules $(basename $module .ko)
				;;
			esac
		done < $builtin
	fi
}

# find and only copy modules relevant to a mountpoint
dep_add_modules_mount()
{
	local dir dev_node FSTYPE

	dir="$1"

	# require mounted sysfs
	if [ ! -d /sys/devices/ ]; then
		echo "mkinitramfs: MODULES dep requires mounted sysfs on /sys" >&2
		exit 1
	fi

	# find out block device + fstype
	eval "$(while read dev mp fs opts rest ; do \
		[ "$mp" = "$dir" ] && [ "$fs" != "rootfs" ] \
		&& printf "dev_node=$dev\nFSTYPE=$fs"\
		&& break; done < /proc/mounts)"

	# Only the root mountpoint has to exist; do nothing if any other
	# directory is not a mountpoint.
	if [ "$dir" != / ] && [ -z "$dev_node" ]; then
		return
	fi

	# handle ubifs and return since ubifs is mounted on char devices
	# but most of the commands below only work with block devices.
	if [ "${FSTYPE}" = "ubifs" ]; then
		manual_add_modules "${FSTYPE}"
		return
	fi

	if [ "${FSTYPE}" = "zfs" ]; then
		manual_add_modules "${FSTYPE}"
 
		# ZFS uses the name of a filesystem instead of a device. Find
		# the devices that make up the pool containing the specified
		# filesystem, and add the appropriate driver for each device.
		local poolname="${dev_node%%/*}"
		zpool list -vPL "$poolname" | while read dev ignored; do
			# Ignore non-leaf vdevs by skipping anything that doesn't
			# look like an absolute path
			echo "$dev" | grep -q '^/' && block_dev_mod_add "$dev"
		done
		return
	fi

	if [ "$dir" = / ] && [ "${dev_node}" = "/dev/root" ] ; then
		if [ -b "${dev_node}" ]; then
			# Match it to the canonical device name by UUID
			dev_node="/dev/disk/by-uuid/"$(blkid -o value -s UUID ${dev_node}) 2>/dev/null
		else
			# Does not exist in our namespace, so look at the
			# kernel command line
			dev_node=
			for arg in $(cat /proc/cmdline); do
				case "$arg" in
				root=*)
					dev_node="${arg#root=}"
					if [ "${dev_node#/dev/}" = "$dev_node" ]; then
						dev_node="/dev/$dev_node"
					fi
					;;
				--)
					break
					;;
				*)
					;;
				esac
			done
		fi
	fi

	# recheck device
	if [ -z "$dev_node" ] || ! dev_node="$(readlink -f ${dev_node})" \
		|| ! [ -b "$dev_node" ]; then
		echo "mkinitramfs: failed to determine device for $dir" >&2
		echo "mkinitramfs: workaround is MODULES=most, check:" >&2
		echo "grep -r MODULES /etc/initramfs-tools/" >&2
		echo "" >&2
		echo "Error please report bug on initramfs-tools" >&2
		echo "Include the output of 'mount' and 'cat /proc/mounts'" >&2
		exit 1
	fi

	# do not trust mount, check superblock
	eval "$(/usr/lib/klibc/bin/fstype ${dev_node})"

	# check that fstype fs recognition
	if [ "${FSTYPE}" = "unknown" ]; then
		FSTYPE=$(blkid -o value -s TYPE "${dev_node}")
		if [  -z "${FSTYPE}" ]; then
			echo "mkinitramfs: unknown fstype on device ${dev_node}" >&2
			echo "mkinitramfs: workaround is MODULES=most" >&2
			echo "Error please report bug on initramfs-tools" >&2
			exit 1
		fi
	fi

	# Add filesystem
	manual_add_modules ${FSTYPE}

	block_dev_mod_add "$dev_node"
}

dep_add_modules()
{
	local device dev_node
	local modules=

	dep_add_modules_mount /
	dep_add_modules_mount /usr

	if [ -n "${RESUME}" ]; then
		dev_node="$(resolve_device "${RESUME}")"
		if [ -n "${dev_node}" ]; then
			block_dev_mod_add "${dev_node}"
		fi
	fi

	# sys walk some important device classes
	for class in gpio phy regulator rtc; do
		for device in /sys/class/$class/*; do
			device="$(readlink -f "$device")" \
				&& sys_walk_mod_add "$device"
		done
	done

	# clk, USB-PHY and pinctrl devices are outside the device model (!) so
	# match loaded modules by name
	add_loaded_modules 'clk[-_]*'
	add_loaded_modules 'phy[-_]*'
	add_loaded_modules 'pinctrl[-_]*'

	# Sys walk keyboards.  We identify keyboards as input devices
	# that can generate at least key events 1-31; udev has the
	# same heuristic.  Note that the format of the bitmap
	# properties depends on the word size of the process reading
	# the uevent file!
	for device in /sys/class/input/input*; do
		if grep -qs "^KEY=.*fffffff[ef]$" "${device}/uevent"; then
			sys_walk_mod_add "$(readlink -f "$device")"
		fi
	done

	# catch old-style IDE
	if [ -e /sys/bus/ide/devices/ ]; then
		modules="$modules ide-gd_mod ide-cd"
	fi

	if [ -e /sys/bus/scsi/devices/ ]; then
		modules="$modules sd_mod"
	fi

	if [ -e /sys/bus/mmc/devices/ ]; then
		modules="$modules mmc_block"
	fi

	if [ -e /sys/bus/virtio ] ; then
		modules="$modules virtio_pci virtio_mmio"
	fi

	if [ -e /sys/bus/i2o/devices/ ]; then
		force_load i2o_block
		force_load i2o_config
	fi

	if [ -e /sys/bus/ps3_system_bus/ ]; then
		modules="$modules ps3disk ps3rom ps3-gelic ps3_sys_manager"
	fi

	if [ -e /sys/bus/vio/ ]; then
		modules="$modules sunvnet sunvdc"
	fi

	manual_add_modules $modules
}

# The modules "most" classes added per default to the initramfs
auto_add_modules()
{
	local arg
	local modules=

	if [ "$#" -eq 0 ] ; then
		set -- base net ide scsi block ata i2o dasd ieee1394 firewire mmc usb_storage virtual nx
	fi

	for arg in "$@" ; do
		case "$arg" in
		base)
			modules="$modules btrfs ext2 ext3 ext4 ext4dev "
			modules="$modules isofs jfs reiserfs squashfs udf xfs"
			modules="$modules nfs nfsv2 nfsv3 nfsv4"
			modules="$modules af_packet atkbd i8042 psmouse"
			modules="$modules virtio_pci virtio_mmio"
			# nls not automatically pulled in as ubuntu has built-in vfat
			modules="$modules vfat nls_cp437 nls_iso8859-1"

			# Include most USB host and dual-role drivers
			copy_modules_dir kernel/drivers/usb/host \
				hwa-hc.ko sl811_cs.ko sl811-hcd.ko \
				u132-hcd.ko whci-hcd.ko
			copy_modules_dir kernel/drivers/usb/c67x00
			copy_modules_dir kernel/drivers/usb/chipidea
			copy_modules_dir kernel/drivers/usb/dwc2
			copy_modules_dir kernel/drivers/usb/dwc3
			copy_modules_dir kernel/drivers/usb/isp1760
			copy_modules_dir kernel/drivers/usb/musb
			copy_modules_dir kernel/drivers/usb/renesas_usbhs
			# and any extcon drivers for USB
			modules="$modules extcon-usb-gpio"

			# Include all HID drivers unless we're sure they
			# don't support keyboards.  hid-*ff covers various
			# game controllers with force feedback.
			copy_modules_dir kernel/drivers/hid \
				'hid-*ff.ko' hid-a4tech.ko hid-cypress.ko \
				hid-dr.ko hid-elecom.ko hid-gyration.ko \
				hid-icade.ko hid-kensington.ko hid-kye.ko \
				hid-lcpower.ko hid-magicmouse.ko \
				hid-multitouch.ko hid-ntrig.ko \
				hid-petalynx.ko hid-picolcd.ko hid-pl.ko \
				hid-ps3remote.ko hid-quanta.ko \
				'hid-roccat-ko*.ko' hid-roccat-pyra.ko \
				hid-saitek.ko hid-sensor-hub.ko hid-sony.ko \
				hid-speedlink.ko hid-tivo.ko hid-twinhan.ko \
				hid-uclogic.ko hid-wacom.ko hid-waltop.ko \
				hid-wiimote.ko hid-zydacron.ko

			# Any of these might be needed by other drivers
			copy_modules_dir kernel/drivers/bus
			copy_modules_dir kernel/drivers/clk
			copy_modules_dir kernel/drivers/gpio
			copy_modules_dir kernel/drivers/i2c/busses
			copy_modules_dir kernel/drivers/i2c/muxes
			copy_modules_dir kernel/drivers/phy
			copy_modules_dir kernel/drivers/pinctrl
			copy_modules_dir kernel/drivers/regulator
			copy_modules_dir kernel/drivers/usb/phy

			# Needed for periodic fsck
			copy_modules_dir kernel/drivers/rtc
		;;
		net)
			copy_modules_dir kernel/drivers/net \
				appletalk arcnet bonding can dummy.ko \
				hamradio hippi ifb.ko irda macvlan.ko \
				macvtap.ko pcmcia sb1000.ko team tokenring \
				tun.ko usb veth.ko wan wimax wireless \
				xen-netback.ko
			# Include modules that can be request_module'd from
			# their network drivers (e.g. from mlx4_core)
			copy_modules_dir kernel/drivers/infiniband/hw/mlx4
			copy_modules_dir kernel/drivers/infiniband/hw/mlx5
			# Ubuntu backported bnxt driver
			copy_modules_dir kernel/ubuntu/bnxt
		;;
		ide)
			copy_modules_dir kernel/drivers/ide
		;;
		mmc)
			copy_modules_dir kernel/drivers/mmc
		;;
		scsi)
			copy_modules_dir kernel/drivers/scsi
			modules="$modules mptfc mptsas mptscsih mptspi zfcp"
		;;
		ata)
			copy_modules_dir kernel/drivers/ata
		;;
		block)
			copy_modules_dir kernel/drivers/block
			copy_modules_dir kernel/drivers/nvme
			modules="$modules vmd"
		;;
		ubi)
			modules="$modules deflate zlib lzo ubi ubifs"
		;;
		ieee1394)
			modules="$modules ohci1394 sbp2"
		;;
		firewire)
			modules="$modules firewire-ohci firewire-sbp2"
		;;
		i2o)
			modules="$modules i2o_block"
		;;
		dasd)
			modules="$modules dasd_diag_mod dasd_eckd_mod dasd_fba_mod"
		;;
		usb_storage)
			copy_modules_dir kernel/drivers/usb/storage
		;;
		virtual)
			# Hyper-V
			modules="$modules hv_vmbus hv_utils hv_netvsc hv_mouse hv_storvsc hyperv-keyboard"
		;;
		nx)
			# PowerPC NX Crypto Coprocessor
			modules="$modules nx-compress nx-compress-crypto nx-compress-platform"
			modules="$modules nx-compress-pseries nx-compress-powernv 842-decompress"
		;;
		esac
	done

	manual_add_modules $modules
}

# 'depmod' only looks at symbol dependencies; there is no way for
# modules to declare explicit dependencies through module information,
# so dependencies on e.g. crypto providers are hidden.  Until this is
# fixed, we need to handle those hidden dependencies.
hidden_dep_add_modules()
{
	local modules=
	for dep in "lib/libcrc32c crc32c" \
			"fs/ubifs/ubifs deflate zlib lzo" \
			"fs/btrfs/btrfs crc32c"; do
		set -- $dep
		if [ -f "${DESTDIR}/lib/modules/${version}/kernel/$1.ko" ]; then
			shift
			modules="$modules $@"
		fi
	done
	manual_add_modules $modules
}

# mkinitramfs help message
usage()
{
	cat >&2 << EOF

Usage: ${0} [OPTION]... -o outfile [version]

Options:
  -c compress	Override COMPRESS setting in initramfs.conf.
  -d confdir	Specify an alternative configuration directory.
  -k		Keep temporary directory used to make the image.
  -o outfile	Write to outfile.
  -r root	Override ROOT setting in initramfs.conf.

See mkinitramfs(8) for further details.
EOF
	exit 1

}

# Find the source for a script file.  This is needed to work around
# temporary directories mounted with the noexec option.  The source
# will be on / or /usr which must be executable.
get_source()
{
	if [ -z "$scriptdir" ]; then
		echo "${initdir}/$1"
	elif [ -f "${CONFDIR}${scriptdir}/$1" ]; then
		echo "${CONFDIR}${scriptdir}/$1"
	else
		echo "/usr/share/initramfs-tools${scriptdir}/$1"
	fi
}

set_initlist()
{
	unset initlist
	for si_x in ${initdir}/*; do
		# skip empty dirs without warning
		[ "${si_x}" = "${initdir}/*" ] && return

		# only allow variable name chars
		case ${si_x#${initdir}/} in
		*[![:alnum:]\._-]*)
			[ "${verbose}" = "y" ] \
			&& echo "$si_x ignored: not alphanumeric or '_' file" >&2
			continue
			;;
		esac

		# skip directories
		if [ -d ${si_x} ]; then
			[ "${verbose}" = "y" ] \
			&& echo "$si_x ignored: a directory" >&2
			continue
		fi

		si_x="$(get_source "${si_x#${initdir}/}")"

		# skip non executable scripts
		if [ ! -x ${si_x} ]; then
			[ "${verbose}" = "y" ] \
			&& echo "$si_x ignored: not executable" >&2
			continue
		fi

		# skip bad syntax
		if ! sh -n ${si_x} ; then
			[ "${verbose}" = "y" ] \
			&& echo "$si_x ignored: bad syntax" >&2
			continue
		fi

		initlist="${initlist:-} ${si_x##*/}"
	done
}

get_prereq_pairs()
{
	set_initlist
	for gp_x in ${initlist:-}; do
		echo ${gp_x} ${gp_x}
		gp_src="$(get_source $gp_x)"
		prereqs=$("${gp_src}" prereqs)
		for prereq in ${prereqs}; do
			echo ${prereq} ${gp_x}
		done
	done
}

# cache boot scripts order
cache_run_scripts()
{
	DESTDIR=${1}
	scriptdir=${2}
	initdir=${DESTDIR}${scriptdir}
	[ ! -d ${initdir} ] && return

	> ${initdir}/ORDER
	runlist=$(get_prereq_pairs | tsort)
	for crs_x in ${runlist}; do
		[ -f ${initdir}/${crs_x} ] || continue
		echo "${scriptdir}/${crs_x} \"\$@\"" >> ${initdir}/ORDER
		echo "[ -e /conf/param.conf ] && . /conf/param.conf" >> ${initdir}/ORDER
	done
}

call_scripts()
{
	set -e
	for cs_x in ${runlist}; do
		[ -f ${initdir}/${cs_x} ] || continue
		if [ x"$call_scripts_optional" = "xy" ]; then
			option=$(sed '/^OPTION=/!d;$d;s/^OPTION=//;s/[[:space:]]*$//' "${initdir}/${cs_x}")
			[ -z "${option}" ] || eval test -n \"\${$option}\" -a \"\${$option}\" != \"n\" || continue
		fi

		# mkinitramfs verbose output
		if [ "${verbose}" = "y" ]; then
			echo "Calling hook ${cs_x}"
		fi
		${initdir}/${cs_x} && ec=$? || ec=$?
		# allow hooks to abort build:
		if [ "$ec" -ne 0 ]; then
			echo "E: ${initdir}/${cs_x} failed with return $ec."
			# only errexit on mkinitramfs
			[ -n "${version}" ] && exit $ec
		fi
		# allow boot scripts to modify exported boot parameters
		if [ -e /conf/param.conf ]; then
			. /conf/param.conf
		fi
	done
	set +e
}

run_scripts()
{
	scriptdir=${2:-}
	initdir=${1}
	[ ! -d ${initdir} ] && return

	runlist=$(get_prereq_pairs | tsort)
	call_scripts $scriptdir
}

run_scripts_optional()
{
	call_scripts_optional=y
	run_scripts "$@"
}

add_dns() {
	local destdir="$1" nsswitch="" lib="" libdir="" f="" d=""
	# find the multiarch lib dir (for example /lib/x86_64-linux-gnu)
	# by finding a directory with libc.so.6.
	for d in /lib/* /lib; do
		for f in "$d"/libc.so.?; do [ -f "$f" ] && break; done
		[ -f "$f" ] && libdir="$d" && break
	done
	if [ -z "$libdir" ]; then
		echo "WARNING: no libdir found for adding dns." 1>&2
		return
	fi
	nsswitch="$destdir/etc/nsswitch.conf"
	if ! grep -qs "^hosts:" "$nsswitch"; then
		echo "hosts: files dns" >> "$nsswitch"
	fi
	local found=""
	for lib in libnss_files libnss_dns libresolv; do
		found=""
		for f in "$libdir/$lib.so".?; do
			[ -e "$f" ] || continue
			[ "$verbose" = "y" ] && echo "dns: $lib: $f"
			copy_file library "$f"
			found="$f"
		done
		[ -n "$found" ] || echo "WARNING: no $libdir/$lib.? file" 1>&2
	done
	return 0
}