#!/bin/sh

set -e

# use temporary file, because env variables deal poorly with \0 inside
tmpfile=$(mktemp)
trap "rm -f $tmpfile" EXIT
qubesd-query -e \
        "$QREXEC_REMOTE_DOMAIN" \
        "admin.vm.volume.Import" \
        "$QREXEC_REQUESTED_TARGET" \
        "$1" >$tmpfile

# exit if qubesd returned an error (not '0\0')
if [ "$(head -c 2 $tmpfile | xxd -p)" != "3000" ]; then
    cat "$tmpfile"
    exit 1
fi
size=$(tail -c +3 "$tmpfile"|cut -d ' ' -f 1)
path=$(tail -c +3 "$tmpfile"|cut -d ' ' -f 2)

# now process stdin into this path
if dd bs=4k of="$path" count="$size" iflag=count_bytes \
        conv=sparse,notrunc,nocreat,fdatasync; then
    status="ok"
else
    status="fail"
fi

# send status notification to qubesd, and pass its response to the caller
echo -n "$status" | qubesd-query -c /var/run/qubesd.internal.sock \
    "$QREXEC_REMOTE_DOMAIN" \
    "internal.vm.volume.ImportEnd" \
    "$QREXEC_REQUESTED_TARGET" \
    "$1"