X-Git-Url: https://git.jankratochvil.net/?p=nethome.git;a=blobdiff_plain;f=bin%2Fqemu-img-recompress;h=5aa41263343f007011c7ff3871d3e5bddc663569;hp=0feb535c8df0cd73e7d993b65456346b2203b5b0;hb=c36d3924d6aa4ea711f344e215e2f5b8525fd0a0;hpb=ec43c7627b731e3b684aee00285b01122188b3a4

diff --git a/bin/qemu-img-recompress b/bin/qemu-img-recompress
index 0feb535..5aa4126 100755
--- a/bin/qemu-img-recompress
+++ b/bin/qemu-img-recompress
@@ -1,5 +1,10 @@
 #! /bin/sh
 renice 20 -p $$
+guestfish=true
+if [ "$1" = "-n" ];then
+	guestfish=false
+	shift
+fi
 for file in "$@";do
 	if [ "$file" = "${file%.qcow2}" ];then
 		echo >&2 "Invalid: <$file>"
@@ -12,6 +17,10 @@ for file in "$@";do
 	set -xe
 	mv -i "$file" "$file"-src
 	rm -f "$file"-dest
+	if $guestfish;then
+		test "$(guestfish -n -a "$file"-src run : list-devices : list-partitions|tr '\n' ' ')" = "/dev/vda /dev/vda1 "
+		guestfish -n -a "$file"-src run : zerofree /dev/vda1
+	fi
 	time qemu-img convert -c -f qcow2 "$file"-src -O qcow2 "$file"-dest
 	mv -i "$file"-dest "$file"
 	rm -f "$file"-src