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#!/bin/zsh
# filesystem — umount everything except / before root-fs goes read-only
#
# umountall -l unmounts all local-type filesystems that are NOT /.
# ZFS pools export is handled implicitly by umount of their mountpoints.

set -e
set -u

# Best-effort: anything that can't umount (busy) is logged but doesn't
# block shutdown — ZFS in-kernel state will still checkpoint correctly.
/usr/sbin/umountall -l || true

# Explicitly sync ZFS before root goes ro
/usr/sbin/zpool sync || true

exit 0