From f9bc75a5c3519fa4418475f86373a1934d5dac45 Mon Sep 17 00:00:00 2001
From: Ralph Ronnquist <rrq@rrq.au>
Date: Sun, 5 Nov 2023 22:22:05 +1100
Subject: [PATCH] Firm up the iso boot variant.

---
 packiso.sh | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/packiso.sh b/packiso.sh
index ce72a68..b6558f2 100755
--- a/packiso.sh
+++ b/packiso.sh
@@ -20,10 +20,17 @@ if [ ! -d $ISOTREE ] ; then
     echo "# Set up the isolinux boot loader in $ISOTREE"
     mkdir -p $ISOTREE/boot/isolinux/bios
     cp kernel/usr/lib/syslinux/modules/bios/* $ISOTREE/boot/isolinux/bios
-    mv $ISOTREE/boot/isolinux/bios/ldlinux.c32 $ISOTREE/boot/isolinux
     cp kernel/usr/lib/ISOLINUX/isolinux.bin $ISOTREE/boot/isolinux
-    cp syslinux-iso.cfg $ISOTREE/boot/isolinux/syslinux.cfg
-    mcopy -i $P1 ::/splash.png ::/vmlinuz $ISOTREE/
+
+    ## ldlinux.c32 must be sibling to isolinux.bin
+    mv $ISOTREE/boot/isolinux/bios/ldlinux.c32 $ISOTREE/boot/isolinux
+
+    ## use isolinux.cfg for isolinux boot
+    cp syslinux-iso.cfg $ISOTREE/boot/isolinux/isolinux.cfg
+
+    ## put splash, vmlinux and initrd as siblings
+    mcopy -i $P1 ::/splash.png ::/vmlinuz ::/initrd.gz $ISOTREE/boot/isolinux
+    
 fi
 
 [ -r $ISO ] && rm $ISO
@@ -53,17 +60,19 @@ XORRISO=(
 
     # Mastering a disk legacy boot reusing the cdrom legacy boot
     -boot_image isolinux dir=/boot/isolinux
-    -boot_image any next
-
+    #-boot_image  any iso_mbr_part_type=0x00
+    -boot_image isolinux  partition_entry=gpt_basdat
+    
     # Mastering a disk UEFI boot using the separate boot partition $P1
     # Bootloader = /EFI/BOOT/bootx64.efi
+    -boot_image any next
     -append_partition 2 0xef ${P1}
     -boot_image any 
     efi_path=--interval:appended_partition_2:all::/EFI/BOOT/bootx64.efi
 
-    # cdrom UEFI boot is missing
+    # make part#2 bootable
 )
 
 xorriso "${XORRISO[@]}"
 #sfdisk -f --part-attrs tiniest.iso 2 LegacyBIOSBootable
-sfdisk -A tiniest.iso 2
+#sfdisk -A tiniest.iso 2
-- 
2.39.2