d2d4c2e4e7
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278 lines
8.6 KiB
Go
278 lines
8.6 KiB
Go
package main
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import (
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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)
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func main() {
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if len(os.Args) < 2 {
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fmt.Println("Usage: go run create-minimal-working-image.go <rootfs-path> [output-path]")
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os.Exit(1)
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}
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rootfsPath := os.Args[1]
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outputPath := "debian-minimal-working.img"
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if len(os.Args) > 2 {
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outputPath = os.Args[2]
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}
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fmt.Printf("Creating minimal working bootable image from rootfs: %s\n", rootfsPath)
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fmt.Printf("Output: %s\n", outputPath)
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// Check if rootfs exists
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if _, err := os.Stat(rootfsPath); os.IsNotExist(err) {
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fmt.Printf("Error: rootfs path does not exist: %s\n", rootfsPath)
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os.Exit(1)
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}
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// Create a 5GB raw disk image
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imageSize := "5G"
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fmt.Printf("Creating %s raw disk image...\n", imageSize)
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// Use qemu-img to create the image
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cmd := exec.Command("qemu-img", "create", "-f", "raw", outputPath, imageSize)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Error creating image: %v\n", err)
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os.Exit(1)
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}
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// Create a loop device
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fmt.Println("Setting up loop device...")
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cmd = exec.Command("sudo", "losetup", "--find", "--show", outputPath)
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output, err := cmd.Output()
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if err != nil {
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fmt.Printf("Error setting up loop device: %v\n", err)
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os.Exit(1)
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}
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loopDevice := strings.TrimSpace(string(output))
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fmt.Printf("Loop device: %s\n", loopDevice)
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// Clean up loop device on exit
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defer func() {
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fmt.Printf("Cleaning up loop device: %s\n", loopDevice)
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exec.Command("sudo", "losetup", "-d", loopDevice).Run()
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}()
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// Create partition table (GPT)
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fmt.Println("Creating GPT partition table...")
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cmd = exec.Command("sudo", "parted", loopDevice, "mklabel", "gpt")
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Error creating partition table: %v\n", err)
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os.Exit(1)
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}
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// Create a single partition
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fmt.Println("Creating partition...")
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cmd = exec.Command("sudo", "parted", loopDevice, "mkpart", "primary", "ext4", "1MiB", "100%")
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Error creating partition: %v\n", err)
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os.Exit(1)
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}
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// Get the partition device
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partitionDevice := loopDevice + "p1"
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fmt.Printf("Partition device: %s\n", partitionDevice)
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// Format the partition with ext4
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fmt.Println("Formatting partition with ext4...")
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cmd = exec.Command("sudo", "mkfs.ext4", partitionDevice)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Error formatting partition: %v\n", err)
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os.Exit(1)
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}
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// Create mount point
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mountPoint := "/tmp/particle-os-mount"
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if err := os.MkdirAll(mountPoint, 0755); err != nil {
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fmt.Printf("Error creating mount point: %v\n", err)
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os.Exit(1)
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}
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// Mount the partition
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fmt.Printf("Mounting partition to %s...\n", mountPoint)
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cmd = exec.Command("sudo", "mount", partitionDevice, mountPoint)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Error mounting partition: %v\n", err)
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os.Exit(1)
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}
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// Clean up mount on exit
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defer func() {
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fmt.Printf("Unmounting %s...\n", mountPoint)
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exec.Command("sudo", "umount", mountPoint).Run()
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}()
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// Copy rootfs content
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fmt.Printf("Copying rootfs content from %s to %s...\n", rootfsPath, mountPoint)
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cmd = exec.Command("sudo", "cp", "-a", rootfsPath+"/.", mountPoint+"/")
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Error copying rootfs: %v\n", err)
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os.Exit(1)
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}
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// Fix permissions after copy
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fmt.Println("Fixing permissions...")
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cmd = exec.Command("sudo", "chown", "-R", "root:root", mountPoint)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Warning: could not fix ownership: %v\n", err)
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}
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// Create a minimal working system
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fmt.Println("Setting up minimal working system...")
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// Create /boot directory if it doesn't exist
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bootDir := filepath.Join(mountPoint, "boot")
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if err := os.MkdirAll(bootDir, 0755); err != nil {
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fmt.Printf("Warning: could not create boot directory: %v\n", err)
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}
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// Create a simple fstab
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fmt.Println("Creating fstab...")
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fstabContent := `# /etc/fstab for particle-os
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/dev/sda1 / ext4 rw,errors=remount-ro 0 1
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proc /proc proc defaults 0 0
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sysfs /sys sysfs defaults 0 0
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devpts /dev/pts devpts gid=5,mode=620 0 0
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tmpfs /run tmpfs defaults 0 0
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`
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fstabFile := filepath.Join(mountPoint, "etc", "fstab")
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cmd = exec.Command("sudo", "sh", "-c", fmt.Sprintf("cat > %s << 'EOF'\n%sEOF", fstabFile, fstabContent))
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Warning: could not create fstab: %v\n", err)
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}
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// Create a simple inittab for sysvinit
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fmt.Println("Creating inittab...")
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inittabContent := `# /etc/inittab for particle-os
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id:2:initdefault:
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si::sysinit:/etc/init.d/rcS
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1:2345:respawn:/sbin/getty 38400 tty1
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2:23:respawn:/sbin/getty 38400 tty2
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3:23:respawn:/sbin/getty 38400 tty3
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4:23:respawn:/sbin/getty 38400 tty4
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5:23:respawn:/sbin/getty 38400 tty5
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6:23:respawn:/sbin/getty 38400 tty6
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`
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inittabFile := filepath.Join(mountPoint, "etc", "inittab")
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cmd = exec.Command("sudo", "sh", "-c", fmt.Sprintf("cat > %s << 'EOF'\n%sEOF", inittabFile, inittabContent))
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Warning: could not create inittab: %v\n", err)
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}
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// Create a simple rcS script
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fmt.Println("Creating rcS script...")
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rcsContent := `#!/bin/sh
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# /etc/init.d/rcS for particle-os
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echo "Starting particle-os..."
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t devpts devpts /dev/pts
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echo "particle-os started successfully"
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`
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rcsFile := filepath.Join(mountPoint, "etc", "init.d", "rcS")
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if err := os.MkdirAll(filepath.Dir(rcsFile), 0755); err != nil {
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fmt.Printf("Warning: could not create init.d directory: %v\n", err)
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}
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cmd = exec.Command("sudo", "sh", "-c", fmt.Sprintf("cat > %s << 'EOF'\n%sEOF", rcsFile, rcsContent))
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Warning: could not create rcS: %v\n", err)
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}
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exec.Command("sudo", "chmod", "+x", rcsFile).Run()
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// Create a simple kernel command line
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cmdline := "root=/dev/sda1 rw console=ttyS0 init=/bin/sh"
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cmdlineFile := filepath.Join(bootDir, "cmdline.txt")
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cmd = exec.Command("sudo", "sh", "-c", fmt.Sprintf("echo '%s' > %s", cmdline, cmdlineFile))
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Warning: could not create cmdline.txt: %v\n", err)
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}
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// Install extlinux bootloader
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fmt.Println("Installing extlinux bootloader...")
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// Check if extlinux is available
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if _, err := exec.LookPath("extlinux"); err == nil {
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// Install extlinux
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cmd = exec.Command("sudo", "extlinux", "--install", bootDir)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Warning: extlinux installation failed: %v\n", err)
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} else {
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fmt.Println("extlinux installed successfully")
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}
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} else {
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fmt.Println("extlinux not available, skipping bootloader installation")
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}
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// Create a simple syslinux config
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syslinuxConfig := `DEFAULT linux
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TIMEOUT 50
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PROMPT 0
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LABEL linux
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KERNEL /boot/vmlinuz
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APPEND root=/dev/sda1 rw console=ttyS0 init=/bin/sh
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`
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syslinuxFile := filepath.Join(bootDir, "syslinux.cfg")
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cmd = exec.Command("sudo", "sh", "-c", fmt.Sprintf("cat > %s << 'EOF'\n%sEOF", syslinuxFile, syslinuxConfig))
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Warning: could not create syslinux.cfg: %v\n", err)
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}
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// Install syslinux if available
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if _, err := exec.LookPath("syslinux"); err == nil {
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fmt.Println("Installing syslinux...")
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cmd = exec.Command("sudo", "syslinux", "--install", partitionDevice)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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fmt.Printf("Warning: syslinux installation failed: %v\n", err)
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} else {
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fmt.Println("syslinux installed successfully")
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}
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} else {
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fmt.Println("syslinux not available")
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}
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fmt.Printf("\n✅ Minimal working bootable image created successfully: %s\n", outputPath)
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fmt.Printf("Image size: %s\n", imageSize)
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fmt.Printf("Filesystem: ext4\n")
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fmt.Printf("Bootloader: extlinux/syslinux\n")
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fmt.Printf("Init system: Simple sysvinit with /bin/sh\n")
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fmt.Printf("\nTo test the image:\n")
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fmt.Printf("qemu-system-x86_64 -m 2G -drive file=%s,format=raw -nographic -serial stdio\n", outputPath)
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fmt.Printf("\nNote: This image will boot to a shell prompt. You can run commands like:\n")
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fmt.Printf(" ls / # List files\n")
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fmt.Printf(" cat /etc/os-release # Show OS info\n")
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fmt.Printf(" exit # Exit shell\n")
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}
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