mxgrub: add submenu to grubmenu

mxgrub/mxgrub

@@ -86,11 +86,13 @@ sub is_VX50 {
 	return $data=~/VX50/;
 }
 
+our $submenu="all-other-kernel";
+
 sub get_chosen {
 	my $chosen;
 	open my $p,'-|','grub-editenv','-','list' or die "$!\n";
 	while (<$p>) {
-		/^chosen=(.+)/ and return $1;
+          /^chosen=(?:$submenu>)?(.+)/ and return $1;
 	}
 	close $p or die "$!\n";
 	$? and exit 1;
@@ -185,11 +187,15 @@ if [ -e /etc/local/USB.usb ]; then
 	menuentry "mariuxUSB" --unrestricted { save_env chosen ; linux /boot/bzImage.x86_64 crashkernel=256M root=LABEL=rootusb ro ; initrd /boot/grub/initramfs.igz }
 else
 
+menuentry "$MARIUX_DEFAULT" --unrestricted { set chosen="$submenu>$MARIUX_DEFAULT" ; save_env chosen ; linux /boot/bzImage.x86_64 crashkernel=256M root=LABEL=root ro console=ttyS1,115200n8 console=tty0 ; initrd /boot/grub/initramfs.igz }
+
+submenu "$submenu" --unrestricted {
 $kernellist
-	if [ \$chosen ]; then
-		set default=\$chosen
-		unset chosen          # must be clear to get a clean value from menuentry
-	fi
+}
+       if [ \$chosen ]; then
+               set default=\$chosen
+               unset chosen          # must be clear to get a clean value from menuentry
+       fi
 fi
 EOF
 
@@ -241,7 +247,7 @@ sub cmd_install {
 	if ($label eq 'default') {
 		sys('grub-editenv','-','set',"chosen=$MARIUX_DEFAULT");
 	} else {
-		sys('grub-editenv','-','set',"chosen=$label");
+		sys('grub-editenv','-','set',"chosen=$submenu>$label");
 	}
 }