From 23ab1f8be6a1f4b5ce01e05f8ed3f6b5dae30d0b Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@lukeshu.com>
Date: Tue, 24 May 2022 21:53:28 -0600
Subject: stuff

---
 cmd/btrfs-dump-tree/main.go | 67 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 cmd/btrfs-dump-tree/main.go

(limited to 'cmd/btrfs-dump-tree/main.go')

diff --git a/cmd/btrfs-dump-tree/main.go b/cmd/btrfs-dump-tree/main.go
new file mode 100644
index 0000000..1b3b993
--- /dev/null
+++ b/cmd/btrfs-dump-tree/main.go
@@ -0,0 +1,67 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/davecgh/go-spew/spew"
+
+	"lukeshu.com/btrfs-tools/pkg/btrfs"
+)
+
+func main() {
+	if err := Main(os.Args[1]); err != nil {
+		fmt.Fprintf(os.Stderr, "%s: error: %v\n", os.Args[0], err)
+		os.Exit(1)
+	}
+}
+
+func Main(imgfilename string) (err error) {
+	maybeSetErr := func(_err error) {
+		if _err != nil && err == nil {
+			err = _err
+		}
+	}
+
+	fh, err := os.Open(imgfilename)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		maybeSetErr(fh.Close())
+	}()
+	fs := &btrfs.FS{
+		Devices: []*btrfs.Device{
+			{
+				File: fh,
+			},
+		},
+	}
+
+	superblocks, err := fs.Devices[0].Superblocks()
+	if err != nil {
+		return err
+	}
+
+	spew := spew.NewDefaultConfig()
+	spew.DisablePointerAddresses = true
+
+	sum, err := superblocks[0].Data.CalculateChecksum()
+	if err != nil {
+		return err
+	}
+	fmt.Printf("superblock checksum: %x\n", sum)
+	spew.Dump(superblocks[0].Data)
+
+	syschunks, err := superblocks[0].Data.ParseSysChunkArray()
+	if err != nil {
+		return err
+	}
+	spew.Dump(syschunks)
+
+	if err := btrfs.ScanForNodes(fs.Devices[0], superblocks[0].Data); err != nil {
+		return err
+	}
+
+	return nil
+}
-- 
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