zfs/contrib/initramfs/hooks/zfs.in

#!/bin/sh
#
# Add OpenZFS filesystem capabilities to an initrd, usually for a native ZFS root.
#

if [ "$1" = "prereqs" ]; then
	echo "udev"
	exit
fi

. /usr/share/initramfs-tools/hook-functions

for req in "@sbindir@/zpool" "@sbindir@/zfs" "@mounthelperdir@/mount.zfs"; do
	copy_exec "$req" || {
		echo "$req not available!" >&2
		exit 2
	}
done

copy_exec "@sbindir@/zdb"
copy_exec "@udevdir@/vdev_id"
copy_exec "@udevdir@/zvol_id"
if command -v systemd-ask-password > /dev/null; then
	copy_exec "$(command -v systemd-ask-password)"
fi

# We use pthreads, but i-t from buster doesn't automatically
# copy this indirect dependency: this can be removed when buster finally dies.
find /lib/ -type f -name "libgcc_s.so.[1-9]" | while read -r libgcc; do
	copy_exec "$libgcc"
done

# shellcheck disable=SC2050
if [ @LIBFETCH_DYNAMIC@ != 0 ]; then
	find /lib/ -name @LIBFETCH_SONAME@ | while read -r libfetch; do
		copy_exec "$libfetch"
	done
fi

copy_file config "/etc/hostid"
copy_file cache  "@sysconfdir@/zfs/zpool.cache"
copy_file config "@initconfdir@/zfs"
copy_file config "@sysconfdir@/zfs/zfs-functions"
copy_file config "@sysconfdir@/zfs/vdev_id.conf"
copy_file rule   "@udevruledir@/60-zvol.rules"
copy_file rule   "@udevruledir@/69-vdev.rules"

manual_add_modules zfs

if [ -f "/etc/hostname" ]; then
	copy_file config "/etc/hostname"
else
	hostname="$(mktemp -t hostname.XXXXXXXXXX)"
	hostname > "$hostname"
	copy_file config "$hostname" "/etc/hostname"
	rm -f "$hostname"
fi