#!/bin/bash
# B10B-5 cache CANDIDATE (v4 = v3 + FAULT safe clamp; NOT for writing without a separate GO): exact recipe of b10/b10b3/cache/mkfs-cache-b10b3.sh (86869061);
# differs only in the kernel file (Image.gz-dtb = kernel 7.2.7-aurora-b10b5 96b71ec3 + the same production DTB e47762d1),
# fdt (production DTB), file names, extlinux label, fs label and UUIDs. initrd and append = B9C unchanged. Runs on 480s (mke2fs 1.47.2). Offline only.
# The image contains the AP PSK (in the initramfs) - never publish it.
set -e
cd ~/doc/modem/jz08-aurora/b10/b10b3/cache-v4
OUT=${1:-cache-extlinux-b10b5.img}; F=../out-v4
echo "0fef41b262917c8ae308fa222da0017e2b3cb3ec5da1ca8ba18d0318476761a3  $F/cmdline.txt" | sha256sum -c
echo "b0ea04666c4ab979067fe9c0015bda0e9c8ac742678321e57b18e841c9c69f95  $F/Image.gz-dtb" | sha256sum -c
echo "e47762d1dcd0af6e2acb711fa47ecc13769cd6bcb81259ce50635e8b18b6514a  $F/aurora-b10b3.dtb" | sha256sum -c
echo "ac518e27e2957ad5e4515969b9a3808024e11ef8d1a79433a899a67dbc644558  $F/initramfs.cpio.gz" | sha256sum -c
ST=$(mktemp -d); mkdir -p $ST/extlinux
cp $F/Image.gz-dtb $F/aurora-b10b3.dtb $ST/; cp $F/initramfs.cpio.gz $ST/initramfs-b9c.cpio.gz
printf "default b10b5\nlabel b10b5\n\tlinux /Image.gz-dtb\n\tfdt /aurora-b10b3.dtb\n\tinitrd /initramfs-b9c.cpio.gz\n\tappend %s\n" "$(cat $F/cmdline.txt)" > $ST/extlinux/extlinux.conf
cp $ST/extlinux/extlinux.conf extlinux-b10b5.conf
chmod 0644 $ST/*.* $ST/extlinux/extlinux.conf; chmod 0755 $ST $ST/extlinux
find $ST -exec touch -h -d @1790726400 {} +
rm -f $OUT; truncate -s 134217728 $OUT
E2FSPROGS_FAKE_TIME=1790726400 /sbin/mke2fs -F -q -t ext2 -O none,filetype,sparse_super \
  -b 4096 -I 128 -N 64 -m 0 -L aurora-b10b5 -U 4a5a3038-b6f0-4000-8000-0000b10b5c00 \
  -E root_owner=0:0,hash_seed=4a5a3038-b6f0-4000-8000-0000b10b5c01 -d $ST $OUT 32768
rm -rf $ST
for f in / /lost+found /extlinux /extlinux/extlinux.conf /Image.gz-dtb /aurora-b10b3.dtb /initramfs-b9c.cpio.gz; do for t in atime ctime mtime; do echo "sif $f $t @1790726400"; done; done > /tmp/b10b5-sif.$$
/sbin/debugfs -w -f /tmp/b10b5-sif.$$ $OUT >/dev/null 2>&1; rm -f /tmp/b10b5-sif.$$
/sbin/e2fsck -fn $OUT >/dev/null 2>&1 && echo "e2fsck -fn clean"
stat -c "%n %s" $OUT; sha256sum $OUT