blob: 00758441f01073cf68013842b3423379fd1b6271 (
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#!/bin/sh
[ "$(id -u)" = 0 ] || exec sudo "$0" "$@"
btrfs_truncate()
{
btrfs filesystem show --raw "$1" |
while read devid d size s used u path p
do
[ "$devid $size $used $path" = 'devid size used path' ] || continue
case "$p" in
/dev/loop*) dev=$(losetup -n -l -O back-file "$p") ;;
*) dev=$p ;;
esac
if [ -f "$dev" ]
then
[ "$s" = "$(stat -c %s "$dev")" ] || truncate -s "$s" "$dev" || break
fi
done
}
if [ $# = 0 ]
then
echo 'Usage: $0 <btrfs mountpoint> [...]' >&2
exit 1
fi
for fs
do
btrfs_truncate "$fs" || exit
done
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