Experimental support for SteamOS recovery images. (#3712 #2875 #1815)

IMG/cpio/ventoy/hook/gentoo/mats-hook.sh

@@ -0,0 +1,32 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+VTPATH_OLD=$PATH; PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+for i in 0 1 2 3 4 5 6 7 8 9; do 
+    vtdiskname=$(get_ventoy_disk_name)
+    if [ "$vtdiskname" = "unknown" ]; then
+        vtlog "wait for disk ..."
+        $SLEEP 2
+    else
+        break
+    fi
+done
+
+echo '############ Copy ISO file to memory ... ###############'
+
+vtoydm -C -f $VTOY_PATH/ventoy_image_map -d $vtdiskname -o $VTOY_PATH/dump.iso
+
+[ -d /ventoy/tmpmnt ] || mkdir /ventoy/tmpmnt
+
+mount /ventoy/dump.iso /ventoy/tmpmnt
+cp -a /ventoy/tmpmnt/*  $1/
+
+umount /ventoy/tmpmnt
+rm -f /ventoy/dump.iso
+
+echo '############ Copy ISO file to memory finished OK ###############'
+sleep 2
+
+PATH=$VTPATH_OLD