root / part / vhdpartx @ abdb293f
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#!/bin/sh |
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set -e |
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PARTUTIL=/usr/sbin/part-util |
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LIBVHDIO=/usr/lib/libvhdio.so.1.0 |
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die() |
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{
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echo "$@" |
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exit 1 |
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} |
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usage() |
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{
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echo "usage: $0 [-a | -d | -l] vhd [lib]" |
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echo "-a add partition mappings" |
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echo "-d del partition mappings" |
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echo "-l list partition mappings" |
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exit 1 |
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} |
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|
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parse_args() |
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{
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part_util=$PARTUTIL |
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|
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while [ $# -ge 1 ]; do |
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case $1 in |
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-a) add="TRUE" && count="1$count";; |
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-d) del="TRUE" && count="1$count";; |
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-l) list="TRUE" && count="1$count";; |
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*) if [ -z "$vhd" ]; then vhd=$1; |
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elif [ -z "$lib" ]; then lib=$1; |
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else usage; |
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fi;; |
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esac |
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shift |
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done |
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|
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[[ -z "$lib" ]] && lib=$LIBVHDIO |
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[[ -z "$vhd" || "$count" != "1" ]] && usage |
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return 0 |
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} |
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# screen-scraping of fdisk... not used |
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fdisk_read_partitions() |
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{
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local data=$(LD_PRELOAD=$lib fdisk -l $vhd) |
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local none=$(echo $data | grep "This doesn't look like a partition table") |
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[[ -n "$none" ]] && partitions=0 && return 0 |
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partitions=4 |
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while [[ "$partitions" != "0" ]]; do |
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local hit=$(echo $data | grep "${vhd}$partitions")
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[[ -n "$hit" ]] && break |
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let partitions=$partitions-1 |
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done |
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} |
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part_util_read_partitions() |
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{
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partitions=$(LD_PRELOAD=$lib $part_util -c -i $vhd) |
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} |
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|
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list_mappings() |
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{
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local parts=1 |
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while [[ $parts -le $partitions ]]; do |
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echo ${vhd}$parts
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let parts=$parts+1 |
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done |
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} |
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|
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add_mappings() |
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{
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local parts=1 |
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local path=$(realpath $vhd) |
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while [[ $parts -le $partitions ]]; do |
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[[ -e ${path}${parts} ]] || ln -s $(basename $path) ${path}$parts
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let parts=$parts+1 |
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done |
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} |
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|
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del_mappings() |
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{
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local parts=1 |
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while [[ $parts -le $partitions ]]; do |
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[[ -L ${vhd}$parts ]] && rm -f ${vhd}$parts
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let parts=$parts+1 |
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done |
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} |
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|
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main() |
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{
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parse_args $@ |
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[[ -x $part_util ]] || die "can't find part-util" |
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[[ -r $vhd && -r $lib ]] || die "can't find vhd or lib" |
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|
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part_util_read_partitions |
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|
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[[ -n "$add" ]] && add_mappings |
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[[ -n "$del" ]] && del_mappings |
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[[ -n "$list" ]] && list_mappings |
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return 0 |
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} |
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|
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main $@ |