mirror of
https://github.com/johndoe6345789/SparkOS.git
synced 2026-04-24 13:34:56 +00:00
f74390d632
- Fix ext4 partition size calculation - Mount root filesystem as read-only - Add overlayfs on /var for writable runtime data - Add tmpfs on /run for runtime files - Update GRUB config to mount root as ro - Update init to inform users about immutability Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>
134 lines
4.7 KiB
Bash
Executable File
134 lines
4.7 KiB
Bash
Executable File
#!/bin/bash
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# Create UEFI-bootable SparkOS image with GPT partition table
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# This version uses mtools and mke2fs to avoid needing loop devices
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set -e
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mkdir -p /output /staging/esp /staging/root
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echo "=== Creating UEFI-bootable SparkOS image with GRUB ==="
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# Prepare ESP contents first
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echo "Preparing ESP contents..."
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mkdir -p /staging/esp/EFI/BOOT
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mkdir -p /staging/esp/boot/grub
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# Create GRUB EFI binary using grub-mkstandalone
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grub-mkstandalone \
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--format=x86_64-efi \
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--output=/staging/esp/EFI/BOOT/BOOTX64.EFI \
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--locales="" \
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--fonts="" \
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"boot/grub/grub.cfg=/dev/null"
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# Find the kernel
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KERNEL_PATH=$(find /kernel/boot -name "vmlinuz-*" | head -1)
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KERNEL_VERSION=$(basename $KERNEL_PATH | sed 's/vmlinuz-//')
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INITRD_PATH=$(find /kernel/boot -name "initrd.img-*" | head -1)
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# Copy kernel and initrd to staging
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echo "Copying kernel to staging..."
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cp $KERNEL_PATH /staging/esp/boot/vmlinuz
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if [ -f "$INITRD_PATH" ]; then cp $INITRD_PATH /staging/esp/boot/initrd.img; fi
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# Create GRUB configuration for immutable root with overlay
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printf '%s\n' \
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'set timeout=3' \
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'set default=0' \
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'' \
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'menuentry "SparkOS (Immutable Base + Overlay)" {' \
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' linux /boot/vmlinuz root=LABEL=SparkOS ro init=/sbin/init console=tty1 quiet' \
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'}' \
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> /staging/esp/boot/grub/grub.cfg
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# Prepare root filesystem contents
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echo "Preparing root filesystem..."
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mkdir -p /staging/root/{bin,sbin,etc,proc,sys,dev,tmp,usr/{bin,sbin,lib,lib64},var/{log,run},root,home/spark,boot}
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# Install SparkOS init
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cp /build/init /staging/root/sbin/init
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chmod 755 /staging/root/sbin/init
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# Install busybox
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echo "Installing busybox..."
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cp /bin/busybox /staging/root/bin/busybox
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chmod 755 /staging/root/bin/busybox
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# Create busybox symlinks for essential commands
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for cmd in sh ls cat echo mount umount mkdir rm cp mv chmod chown ln ps kill; do
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ln -sf busybox /staging/root/bin/$cmd
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done
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# Create system configuration files
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echo "sparkos" > /staging/root/etc/hostname
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echo "127.0.0.1 localhost" > /staging/root/etc/hosts
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echo "127.0.1.1 sparkos" >> /staging/root/etc/hosts
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echo "root:x:0:0:root:/root:/bin/sh" > /staging/root/etc/passwd
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echo "spark:x:1000:1000:SparkOS User:/home/spark:/bin/sh" >> /staging/root/etc/passwd
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echo "root:x:0:" > /staging/root/etc/group
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echo "spark:x:1000:" >> /staging/root/etc/group
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# Copy README to root partition
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cp /build/config/image-readme.txt /staging/root/README.txt
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# Create 1GB disk image
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echo "Creating disk image..."
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dd if=/dev/zero of=/output/sparkos.img bs=1M count=1024
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# Create GPT partition table using sgdisk
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echo "Creating GPT partition table..."
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sgdisk -Z /output/sparkos.img 2>/dev/null || true
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sgdisk -n 1:2048:411647 -t 1:ef00 -c 1:"EFI System" /output/sparkos.img
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sgdisk -n 2:411648:0 -t 2:8300 -c 2:"Linux filesystem" /output/sparkos.img
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# Extract partition regions using dd
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echo "Extracting partition regions..."
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dd if=/output/sparkos.img of=/tmp/esp.img bs=512 skip=2048 count=409600 2>/dev/null
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# Calculate exact size for root partition
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ROOT_START=411648
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ROOT_END=$(sgdisk -p /output/sparkos.img | grep "^ 2" | awk '{print $3}')
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ROOT_SIZE=$((ROOT_END - ROOT_START + 1))
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echo "Root partition: start=$ROOT_START, end=$ROOT_END, size=$ROOT_SIZE sectors"
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dd if=/output/sparkos.img of=/tmp/root.img bs=512 skip=$ROOT_START count=$ROOT_SIZE 2>/dev/null
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# Format ESP partition (FAT32)
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echo "Formatting EFI System Partition (FAT32)..."
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mkfs.vfat -F 32 -n "SPARKOSEFI" /tmp/esp.img >/dev/null
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# Populate ESP using mtools (no mount needed!)
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echo "Populating ESP with bootloader and kernel..."
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export MTOOLS_SKIP_CHECK=1
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mmd -i /tmp/esp.img ::/EFI
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mmd -i /tmp/esp.img ::/EFI/BOOT
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mmd -i /tmp/esp.img ::/boot
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mmd -i /tmp/esp.img ::/boot/grub
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mcopy -i /tmp/esp.img /staging/esp/EFI/BOOT/BOOTX64.EFI ::/EFI/BOOT/
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mcopy -i /tmp/esp.img /staging/esp/boot/vmlinuz ::/boot/
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if [ -f "/staging/esp/boot/initrd.img" ]; then
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mcopy -i /tmp/esp.img /staging/esp/boot/initrd.img ::/boot/
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fi
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mcopy -i /tmp/esp.img /staging/esp/boot/grub/grub.cfg ::/boot/grub/
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# Format root partition (ext4) with directory contents (no mount needed!)
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echo "Formatting root partition (ext4) and populating..."
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mke2fs -t ext4 -L "SparkOS" -d /staging/root /tmp/root.img >/dev/null 2>&1
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# Write partitions back to image
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echo "Writing partitions to image..."
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dd if=/tmp/esp.img of=/output/sparkos.img bs=512 seek=2048 count=409600 conv=notrunc 2>/dev/null
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dd if=/tmp/root.img of=/output/sparkos.img bs=512 seek=$ROOT_START count=$ROOT_SIZE conv=notrunc 2>/dev/null
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# Clean up temporary files
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rm -f /tmp/esp.img /tmp/root.img
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# Finalize
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echo "Finalizing image..."
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sync
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# Compress the image
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echo "Compressing image..."
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gzip -9 /output/sparkos.img
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echo "UEFI-bootable image created: /output/sparkos.img.gz"
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