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#!/usr/bin/env bash
# -*- coding: utf-8 -*-
# region imports
source "/usr/lib/rebash/core.sh"
core.import exceptions
exceptions.activate
# endregion
in_device="$1"
nbd_device="$2" # TODO detect first free nbd device
systemd-preserve-process-marker qemu-nbd --connect="$nbd_device" \
"$in_device" --read-only --persistent --nocache
# TODO better way to wait for the device to be made?
i=0
while [ ! -b "$nbd_device" ]; do
[ $i -ge 20 ] && exit 1
if [ $UDEVVERSION -ge 143 ]; then
udevadm settle --exit-if-exists="$nbd_device"
else
sleep 0.1
fi
i=$(($i + 1))
done
# NBD doesn't emit uevents when it gets connected, so kick it
# TODO get path from $nbd_device
echo change > /sys/block/nbd0/uevent
udevadm settle
# region vim modline
# vim: set tabstop=4 shiftwidth=4 expandtab:
# vim: foldmethod=marker foldmarker=region,endregion:
# endregion
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