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Implement SparkOS MVP: init system, build infrastructure, and rootfs
Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>
This commit is contained in:
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36
scripts/build.sh
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36
scripts/build.sh
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#!/bin/bash
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# Quick build script for SparkOS development
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set -e
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PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
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cd "$PROJECT_ROOT"
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echo "SparkOS Quick Build"
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echo "==================="
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echo ""
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# Build init
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echo "Building init system..."
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make init
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# Setup rootfs structure
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echo ""
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echo "Setting up root filesystem..."
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./scripts/setup_rootfs.sh
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# Install init
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echo ""
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echo "Installing init to rootfs..."
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make install
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echo ""
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echo "Build complete!"
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echo ""
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echo "Next steps to create a full bootable system:"
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echo " 1. Populate rootfs/bin with bash and essential utilities"
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echo " (cp /bin/bash rootfs/bin/, etc.)"
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echo " 2. Copy required libraries to rootfs/usr/lib and rootfs/lib"
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echo " 3. Add a Linux kernel to rootfs/boot/vmlinuz"
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echo " 4. Run: sudo make image"
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echo ""
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106
scripts/create_image.sh
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106
scripts/create_image.sh
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#!/bin/bash
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# SparkOS Image Creation Script
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# Creates a bootable dd-able disk image
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set -e
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
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IMAGE_FILE="$PROJECT_ROOT/sparkos.img"
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IMAGE_SIZE="512M"
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MOUNT_POINT="/tmp/sparkos_mount"
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ROOTFS_DIR="$PROJECT_ROOT/rootfs"
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echo "SparkOS Image Builder"
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echo "====================="
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echo ""
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# Check if running as root
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if [ "$(id -u)" -ne 0 ]; then
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echo "ERROR: This script must be run as root"
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echo "Usage: sudo $0"
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exit 1
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fi
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# Check for required tools
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REQUIRED_TOOLS="dd losetup mkfs.ext4 syslinux"
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for tool in $REQUIRED_TOOLS; do
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if ! command -v "$tool" &> /dev/null; then
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echo "ERROR: Required tool '$tool' is not installed"
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exit 1
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fi
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done
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echo "Creating disk image ($IMAGE_SIZE)..."
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dd if=/dev/zero of="$IMAGE_FILE" bs=1M count=512 status=progress
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echo "Setting up loop device..."
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LOOP_DEV=$(losetup -f)
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losetup "$LOOP_DEV" "$IMAGE_FILE"
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echo "Creating partition table..."
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parted -s "$LOOP_DEV" mklabel msdos
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parted -s "$LOOP_DEV" mkpart primary ext4 1MiB 100%
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parted -s "$LOOP_DEV" set 1 boot on
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# Reload partition table
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partprobe "$LOOP_DEV" 2>/dev/null || true
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sleep 1
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# Get partition device
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PART_DEV="${LOOP_DEV}p1"
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if [ ! -e "$PART_DEV" ]; then
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PART_DEV="${LOOP_DEV}1"
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fi
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echo "Creating ext4 filesystem..."
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mkfs.ext4 -F "$PART_DEV"
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echo "Mounting filesystem..."
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mkdir -p "$MOUNT_POINT"
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mount "$PART_DEV" "$MOUNT_POINT"
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echo "Copying rootfs..."
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if [ -d "$ROOTFS_DIR" ]; then
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cp -a "$ROOTFS_DIR"/* "$MOUNT_POINT/"
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else
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echo "WARNING: rootfs directory not found, creating minimal structure"
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mkdir -p "$MOUNT_POINT"/{bin,sbin,etc,proc,sys,dev,tmp,usr/{bin,sbin,lib},var,root,home}
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fi
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echo "Installing bootloader..."
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mkdir -p "$MOUNT_POINT/boot/syslinux"
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# Create syslinux config
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cat > "$MOUNT_POINT/boot/syslinux/syslinux.cfg" << 'EOF'
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DEFAULT linux
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PROMPT 0
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TIMEOUT 50
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LABEL linux
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SAY Booting SparkOS...
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KERNEL /boot/vmlinuz
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APPEND ro root=/dev/sda1 init=/sbin/init console=tty1
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EOF
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# Install syslinux
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syslinux --install "$PART_DEV"
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# Install MBR
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dd if=/usr/lib/syslinux/mbr/mbr.bin of="$LOOP_DEV" bs=440 count=1 conv=notrunc 2>/dev/null || \
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dd if=/usr/share/syslinux/mbr.bin of="$LOOP_DEV" bs=440 count=1 conv=notrunc 2>/dev/null || \
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echo "WARNING: Could not install MBR, you may need to do this manually"
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echo "Cleaning up..."
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umount "$MOUNT_POINT"
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rmdir "$MOUNT_POINT"
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losetup -d "$LOOP_DEV"
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echo ""
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echo "SUCCESS! Bootable image created: $IMAGE_FILE"
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echo ""
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echo "To write to a USB drive:"
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echo " sudo dd if=$IMAGE_FILE of=/dev/sdX bs=4M status=progress"
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echo ""
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echo "WARNING: Replace /dev/sdX with your actual USB drive device"
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echo " This will DESTROY all data on the target drive!"
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148
scripts/setup_rootfs.sh
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148
scripts/setup_rootfs.sh
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#!/bin/bash
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# SparkOS Setup Script
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# Sets up a minimal rootfs with bash and essential utilities
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set -e
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
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ROOTFS_DIR="$PROJECT_ROOT/rootfs"
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echo "SparkOS Root Filesystem Setup"
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echo "=============================="
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echo ""
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# Create directory structure
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echo "Creating directory structure..."
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mkdir -p "$ROOTFS_DIR"/{bin,sbin,etc,proc,sys,dev,tmp,usr/{bin,sbin,lib,lib64},var,root,home}
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mkdir -p "$ROOTFS_DIR/etc"/{init.d,network}
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mkdir -p "$ROOTFS_DIR/var"/{log,run}
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# Set permissions
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chmod 1777 "$ROOTFS_DIR/tmp"
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chmod 700 "$ROOTFS_DIR/root"
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# Create basic config files
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echo "Creating configuration files..."
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# /etc/hostname
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echo "sparkos" > "$ROOTFS_DIR/etc/hostname"
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# /etc/hosts
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cat > "$ROOTFS_DIR/etc/hosts" << 'EOF'
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127.0.0.1 localhost
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127.0.1.1 sparkos
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::1 localhost ip6-localhost ip6-loopback
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EOF
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# /etc/passwd
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cat > "$ROOTFS_DIR/etc/passwd" << 'EOF'
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root:x:0:0:root:/root:/bin/bash
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EOF
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# /etc/group
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cat > "$ROOTFS_DIR/etc/group" << 'EOF'
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root:x:0:
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EOF
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# /etc/fstab
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cat > "$ROOTFS_DIR/etc/fstab" << 'EOF'
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# <file system> <mount point> <type> <options> <dump> <pass>
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proc /proc proc defaults 0 0
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sysfs /sys sysfs defaults 0 0
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devtmpfs /dev devtmpfs defaults 0 0
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tmpfs /tmp tmpfs defaults 0 0
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EOF
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# /etc/profile
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cat > "$ROOTFS_DIR/etc/profile" << 'EOF'
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# SparkOS System Profile
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export PATH=/bin:/sbin:/usr/bin:/usr/sbin
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export PS1='SparkOS:\w\$ '
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export HOME=/root
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export TERM=linux
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# Welcome message
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echo "Welcome to SparkOS!"
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echo "Type 'help' for available commands"
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echo ""
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EOF
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# Create .bashrc for root
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cat > "$ROOTFS_DIR/root/.bashrc" << 'EOF'
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# SparkOS Root Bash Configuration
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# Set prompt
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PS1='SparkOS:\w# '
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# Aliases
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alias ls='ls --color=auto'
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alias ll='ls -lah'
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alias ..='cd ..'
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# Environment
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export EDITOR=vi
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export PAGER=less
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EOF
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# Create a simple help script
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cat > "$ROOTFS_DIR/bin/sparkos-help" << 'EOF'
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#!/bin/sh
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cat << 'HELP'
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SparkOS - Minimal Linux Distribution
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====================================
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Available commands:
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ls, cd, pwd - Navigate filesystem
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cat, less - View files
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mkdir, rm, cp - File operations
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mount, umount - Mount filesystems
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poweroff, reboot - System control
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help - Show this help
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This is a minimal system. To extend functionality:
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1. Mount additional filesystems
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2. Install packages (if package manager available)
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3. Build from source
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For more information: https://github.com/johndoe6345789/SparkOS
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HELP
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EOF
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chmod +x "$ROOTFS_DIR/bin/sparkos-help"
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ln -sf sparkos-help "$ROOTFS_DIR/bin/help"
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# Create README
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cat > "$ROOTFS_DIR/README.txt" << 'EOF'
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SparkOS Root Filesystem
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=======================
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This is the root filesystem for SparkOS, a minimal Linux distribution.
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Directory Structure:
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/bin, /sbin - Essential binaries
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/etc - Configuration files
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/proc, /sys, /dev - Kernel interfaces
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/tmp - Temporary files
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/usr - User programs
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/var - Variable data
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/root - Root home directory
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/home - User home directories
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Note: This is a minimal system. You'll need to populate /bin and /usr/bin
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with actual binaries (bash, coreutils, etc.) from a proper Linux system
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or by cross-compiling.
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EOF
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echo ""
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echo "Root filesystem structure created at: $ROOTFS_DIR"
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echo ""
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echo "Next steps:"
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echo " 1. Build init: make init"
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echo " 2. Install init: make install"
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echo " 3. Copy bash and essential binaries to rootfs/bin/"
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echo " 4. Create bootable image: sudo make image"
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echo ""
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echo "Note: You'll need to populate the rootfs with actual binaries"
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echo " before creating a bootable image."
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