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|
xmount_binary="xmount"
dnbd3_binary="dnbd3-server"
image_file_or_directory=""
do_cleanup=false
container_formats="vmdk,vdi,vhd,qcow2"
print_usage() {
cat << EOF
Converts container images (vmdk,vdi,vhd,qcow2) to raw images (on the fly
via xmount).
Usage:
$0 [options] image_file_or_directory
Options:
-h --help Shows this help message.
-x --xmount Path to xmount. (default: "$xmount_binary").
-d --dnbd3 Path to dnbd3-server. (default: "$dnbd3_binary").
-c --cleanup Cleans up the image directory. Unmounts the images and
removes symlinks.
EOF
}
parse_command_line() {
while true; do
case "$1" in
-h|--help)
print_usage "$0"
exit 0
;;
-x|--xmount)
shift
xmount_binary="$1"
shift
;;
-d|--dnbd3)
shift
dnbd3_binary="$1"
shift
;;
-c|--cleanup)
do_cleanup=true
shift
;;
'') # no more parameters
break
;;
*)
if [ -z "$image_file_or_directory" ]; then
if [ -d "$1" ] || [ -f "$1" ]; then
image_file_or_directory="$(realpath "$1")"
else
echo "ERROR: \"$1\" is not a file or a directory."
exit 1
fi
shift
else
echo "ERROR: unsupported argument: \"$1\""
print_usage "$0"
return 1
fi
esac
done
}
cleanup_image() {
local image="$1"
local mountpoint="$(image_to_mountpoint "$image")"
echo "umounting $mountpoint"
if ! umount "$mountpoint";then
echo "WARNING: umount failed, try with sudo"
return 1
fi
rmdir "$mountpoint"
local link_name="$(image_to_link_name "$image")"
[ -L "$link_name" ] && unlink "$link_name"
}
cleanup() {
if [ -d "$image_file_or_directory" ]; then
local image
shopt -s nullglob # skip unmatched container formats
for image in "${image_file_or_directory}"/*.{$container_formats}.r*; do
cleanup_image "$image"
done
else
cleanup_image "$image_file_or_directory"
fi
}
check_binaries() {
echo $xmount_binary
if ! hash "$xmount_binary" 2>/dev/null; then
echo "xmount not found, " \
"install it or try to set the --xmount option"
exit 1
fi
if ! hash "$dnbd3_binary" 2>/dev/null; then
echo "dnbd3-server not found," \
" install it or try to set the --dnbd3 option"
exit 1
fi
}
image_to_mountpoint() {
# convert [imagename].[container_type].[revision] to
# [imagename].[container_type].[revision].xmount
local image="$1"
extension="${image#*.}"
basepath="${image%.$extension}"
echo "${basepath}.${extension}.xmount"
}
image_to_link_name() {
# convert [imagename].[container_type].[revision] to
# [imagename].[container_type].xmount.[revision]
local image="$1"
extension="${image#*.}"
basepath="${image%.$extension}"
revision="${extension#*.}"
container_type="${extension%.*}"
echo "${basepath}.${container_type}.xmount.${revision}"
}
convert_image() {
local image="$1"
[ -d "$image" ] && return 0
local mountpoint="$(image_to_mountpoint "$image")"
local link_name="$(image_to_link_name "$image")"
echo "creating mountpoint: \"$mountpoint\""
mkdir "$mountpoint" || return 1
${xmount_binary} -o nonempty --in qemu "$image" \
--out raw "${mountpoint}"
echo "creating link: \"$link_name\""
ln -s --relative "${mountpoint}"/*.dd "$link_name"
}
convert() {
if [ -d "$image_file_or_directory" ]; then
local image
shopt -s nullglob # skip unmatched container formats
for image in "${image_file_or_directory}"/*.{vmdk,vdi,vhd,qcow2}.r*; do
convert_image "$image"
done
else
convert_image "$image_file_or_directory"
fi
}
parse_command_line "$@"
if $do_cleanup; then
cleanup
else
check_binaries
convert
fi
|
