try to support MODS img (#3771)

IMG/cpio/ventoy/loop/mods/ventoy-disk.sh

@@ -0,0 +1,35 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+vtlog "####### $0 $* ########"
+
+VTPATH_OLD=$PATH; PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+wait_for_usb_disk_ready
+
+vtdiskname=$(get_ventoy_disk_name)
+if [ "$vtdiskname" = "unknown" ]; then
+    vtlog "ventoy disk not found"
+    PATH=$VTPATH_OLD
+    exit 0
+fi
+
+mkdir -p $VTOY_PATH/mnt/fuse $VTOY_PATH/mnt/iso $VTOY_PATH/mnt/squashfs
+
+vtoydm -p -f $VTOY_PATH/ventoy_image_map -d $vtdiskname > $VTOY_PATH/ventoy_dm_table
+vtoy_fuse_iso -f $VTOY_PATH/ventoy_dm_table -m $VTOY_PATH/mnt/fuse -w
+
+vfree=$(losetup -f)
+losetup -P $vfree $VTOY_PATH/mnt/fuse/ventoy.iso
+
+if echo $vtdiskname | egrep -q "nvme|mmc|nbd"; then
+    rm -f ${vtdiskname}p1
+    cp -a ${vfree}p1 ${vtdiskname}p1
+else
+    rm -f ${vtdiskname}1
+    cp -a ${vfree}p1 ${vtdiskname}1
+fi
+
+
+PATH=$VTPATH_OLD

IMG/cpio/ventoy/loop/mods/ventoy-hook.sh

@@ -0,0 +1,5 @@
+#!/ventoy/busybox/sh
+
+. $VTOY_PATH/hook/ventoy-os-lib.sh
+
+$SED "/FOUNDDEV=\"\"/a\ $BUSYBOX_PATH/sh $VTOY_PATH/loop/mods/ventoy-disk.sh" -i /init