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#!/bin/sh
#
# Add ZoL filesystem capabilities to an initrd, usually for a native ZFS root.
#
# This hook installs udev rules for ZoL.
PREREQ="zdev"
# These prerequisites are provided by the zfsutils package. The zdb utility is
# not strictly required, but it can be useful at the initramfs recovery prompt.
COPY_EXEC_LIST="/sbin/zdb /sbin/zpool /sbin/zfs /sbin/mount.zfs"
COPY_EXEC_LIST="$COPY_EXEC_LIST /usr/bin/dirname /lib/udev/vdev_id"
COPY_FILE_LIST="/etc/hostid /etc/zfs/zpool.cache /etc/default/zfs"
COPY_FILE_LIST="$COPY_FILE_LIST /etc/zfs/zfs-functions /etc/zfs/vdev_id.conf"
COPY_FILE_LIST="$COPY_FILE_LIST /lib/udev/rules.d/69-vdev.rules"
# These prerequisites are provided by the base system.
COPY_EXEC_LIST="$COPY_EXEC_LIST /bin/hostname /sbin/blkid"
# Explicitly specify all kernel modules because automatic dependency resolution
# is unreliable on many systems.
BASE_MODULES="zlib_deflate spl zavl zcommon znvpair zunicode zfs"
CRPT_MODULES="sun-ccm sun-gcm sun-ctr"
MANUAL_ADD_MODULES_LIST="$BASE_MODULES"
# Generic result code.
RC=0
case $1 in
prereqs)
echo "$PREREQ"
exit 0
;;
esac
for ii in $COPY_EXEC_LIST
do
if [ ! -x "$ii" ]
then
echo "Error: $ii is not executable."
RC=2
fi
done
if [ "$RC" -ne 0 ]
then
exit "$RC"
fi
. /usr/share/initramfs-tools/hook-functions
mkdir -p "$DESTDIR/etc/"
# ZDB uses pthreads for some functions, but the library dependency is not
# automatically detected. The `find` utility and extended `cp` options are
# used here because libgcc_s.so could be in a subdirectory of /lib for
# multi-arch installations.
cp --target-directory="$DESTDIR" --parents $(find /lib/ -type f -name libgcc_s.so.1)
for ii in $COPY_EXEC_LIST
do
copy_exec "$ii"
done
for ii in $COPY_FILE_LIST
do
dir=$(dirname "$ii")
[ -d "$dir" ] && mkdir -p "$DESTDIR/$dir"
[ -f "$ii" ] && cp -p "$ii" "$DESTDIR/$ii"
done
for ii in $MANUAL_ADD_MODULES_LIST
do
manual_add_modules "$ii"
done
if [ -f "/etc/hostname" ]
then
cp -p "/etc/hostname" "$DESTDIR/etc/"
else
hostname >"$DESTDIR/etc/hostname"
fi
for ii in zfs zfs.conf spl spl.conf
do
if [ -f "/etc/modprobe.d/$ii" ]; then
if [ ! -d "$DESTDIR/etc/modprobe.d" ]; then
mkdir -p $DESTDIR/etc/modprobe.d
fi
cp -p "/etc/modprobe.d/$ii" $DESTDIR/etc/modprobe.d/
fi
done
# With pull request #1476 (not yet merged) comes a verbose warning
# if /usr/bin/net doesn't exist or isn't executable. Just create
# a dummy...
[ ! -d "$DESTDIR/usr/bin" ] && mkdir -p "$DESTDIR/usr/bin"
if [ ! -x "$DESTDIR/usr/bin/net" ]; then
touch "$DESTDIR/usr/bin/net"
chmod +x "$DESTDIR/usr/bin/net"
fi
exit 0
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