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#!/bin/sh -e
# Mount helper tool to mount some kind of writable filesystem over '/var'
# (which might be read-only).
# What kind of filesystem is used to mount over '/var' can be controlled via
# the 'run-varoverlayfs.mount' mount unit and is usually a RAM disk.
set -e
systemctl start run-varoverlayfs.mount
mkdir -p /run/varoverlayfs/upper
mkdir -p /run/varoverlayfs/work
mount -t overlay -olowerdir=/var,upperdir=/run/varoverlayfs/upper,workdir=/run/varoverlayfs/work "${@}"
systemctl stop run-varoverlayfs.mount
rmdir /run/varoverlayfs
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