From 1868029f7b9c276f26b5b39389915f7ded85ae2d Mon Sep 17 00:00:00 2001
From: cvoges12 <vogesclayton@gmail.com>
Date: Thu, 7 Oct 2021 22:47:00 +0000
Subject: [PATCH] uefi and bios style boot images with mkisofs

---
 src/iso.sh | 55 ++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 47 insertions(+), 8 deletions(-)

diff --git a/src/iso.sh b/src/iso.sh
index f691379..8ae1aca 100755
--- a/src/iso.sh
+++ b/src/iso.sh
@@ -4,29 +4,68 @@ printf '%b\n' "\n\033[1m"WINDOWS_INIT:"\033[0m"" Executing extract_iso.sh"
 src/extract_iso.sh
 EXTRACT="win/"
 
-printf '%b\n' "\n\033[1m"WINDOWS_INIT:"\033[0m"" Executing bootsect.sh"
-src/bootsect.sh
+#printf '%b\n' "\n\033[1m"WINDOWS_INIT:"\033[0m"" Executing bootsect.sh"
+#./src/bootsect.sh
+#BOOT="bootsect.bin"
 
 # add answerfile
 cp data/autounattend.xml ${EXTRACT}
-BOOT="bootsect.bin"
+
+# data for mkisofs
+BOOT="boot/etfsboot.com"
+EFI="efi/boot/bootx64.efi"
+LOAD_SEG="$(dumpet -i Win*.iso \
+    | grep "Media load segment: " \
+    | cut -d ':' -f2 \
+    | cut -d ' ' -f2)"
+LOAD_SIZE="$(dumpet -i Win*.iso \
+    | grep "Load Sectors: " \
+    | grep -o "[^:]*$" \
+    | cut -d ' ' -f2 \
+    | head -1)"
+LDA="$(dumpet -i Win*.iso \
+    | grep "LDA" \
+    | tail -n 1 \
+    | awk '{printf $3}')"
+CDROM_SECTOR_SIZE=2048
+FLOPPY_SECTOR_SIZE=512
+
+# number of floppy disk sectors
+dd if=Win*.iso bs=${CDROM_SECTOR_SIZE} skip=${LDA} count=1 > win.dmp
+FLOPPY_SECTORS="$(file win.dmp \
+    | sed -e "s/.*sectors\ //" \
+    | awk '{printf $1}')"
+rm win.dmp
+
+CDROM_SECTORS=`expr $FLOPPY_SECTOR_SIZE \
+    \* $FLOPPY_SECTORS \
+    / $CDROM_SECTOR_SIZE`
+dd if=Win*.iso bs=${CDROM_SECTOR_SIZE} skip=${LDA} count=${CDROM_SECTORS} of=win_efi_boot.img
 
 # install mkisofs
 # recreate iso
 cd ${EXTRACT}
 mkisofs \
     -allow-limited-size \
-    -b ${BOOT} \
     -no-emul-boot \
-    -boot-load-seg 1984 \
-    -boot-load-size 4 \
+    -b ${BOOT} \
+    -boot-load-seg ${LOAD_SEG} \
+    -boot-load-size ${LOAD_SIZE} \
+    -eltorito-alt-boot \
+    -b ${EFI} \
+    -eltorito-platform efi \
     -iso-level 2 \
-    -J -l -D -N -joliet-long -relaxed-filenames \
+    -boot-info-table
+    -udf
+    -J -l -joliet-long \
+    -D \
+    -N \
+    -relaxed-filenames \
     -V "WINSP" \
     -o winsp.iso \
     .
 
-cp winsp.iso ../
+mv winsp.iso ../
 
 # clean up bootsect and iso extract
 cd ..