/usr/sbin/vhdpartx is in blktap-utils 2.0.90-2ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | #!/bin/sh
set -e
PARTUTIL=/usr/sbin/part-util
LIBVHDIO=/usr/lib/libvhdio.so.1.0
die()
{
echo "$@"
exit 1
}
usage()
{
echo "usage: $0 [-a | -d | -l] vhd [lib]"
echo "-a add partition mappings"
echo "-d del partition mappings"
echo "-l list partition mappings"
exit 1
}
parse_args()
{
part_util=$PARTUTIL
while [ $# -ge 1 ]; do
case $1 in
-a) add="TRUE" && count="1$count";;
-d) del="TRUE" && count="1$count";;
-l) list="TRUE" && count="1$count";;
*) if [ -z "$vhd" ]; then vhd=$1;
elif [ -z "$lib" ]; then lib=$1;
else usage;
fi;;
esac
shift
done
[ -z "$lib" ] && lib=$LIBVHDIO
[ -z "$vhd" ] || [ "$count" != "1" ] && usage
return 0
}
# screen-scraping of fdisk... not used
fdisk_read_partitions()
{
local data=$(LD_PRELOAD=$lib fdisk -l $vhd)
local none=$(echo $data | grep "This doesn't look like a partition table")
[ -n "$none" ] && partitions=0 && return 0
partitions=4
while [ "$partitions" != "0" ]; do
local hit=$(echo $data | grep "${vhd}$partitions")
[ -n "$hit" ] && break
partitions=$(($partitions - 1 ))
done
}
part_util_read_partitions()
{
partitions=$(LD_PRELOAD=$lib $part_util -c -i $vhd)
}
list_mappings()
{
local parts=1
while [ $parts -le $partitions ]; do
echo ${vhd}$parts
parts=$(($parts + 1 ))
done
}
add_mappings()
{
local parts=1
local path=$(realpath $vhd)
while [ $parts -le $partitions ]; do
[ -e ${path}${parts} ] || ln -s $(basename $path) ${path}$parts
parts=$(($parts + 1 ))
done
}
del_mappings()
{
local parts=1
while [ $parts -le $partitions ]; do
[ -L ${vhd}$parts ] && rm -f ${vhd}$parts
parts=$(($parts + 1 ))
done
}
main()
{
parse_args $@
[ -x $part_util ] || die "can't find part-util"
[ -r $vhd && -r $lib ] || die "can't find vhd or lib"
part_util_read_partitions
[ -n "$add" ] && add_mappings
[ -n "$del" ] && del_mappings
[ -n "$list" ] && list_mappings
return 0
}
main $@
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