#!/bin/bash -e

kver=$(uname -r)
while read -r line; do
    # We only care about the running kernel
    if [[ "$line" == usr/lib/modules/$kver/vmlinuz && -d usr/lib/modules/running-kernel ]];then
        mount --mkdir --bind --options ro /usr/lib/modules/{running-kernel,$kver} || continue
        # Mounting read-only since the only modification here should be unmounting
        # when rebooting or reinstalling the running kernel
        mount_unit="usr-lib-modules-${kver//-/\\x2d}.mount"
        install -Dm644 <(
cat << EOF
[Unit]
After=$mount_unit
Requires=$mount_unit
EOF
        ) /run/systemd/system/systemd-udevd.service.d/kernel-modules-hook-hardlinks.conf
        systemctl daemon-reload
        # Required for clean umount on shutdown
    fi
done