From 6fcb20d9fb432455bcf5f0f285aa0675a78a67cf Mon Sep 17 00:00:00 2001
From: Felicitas Pojtinger <felicitas@pojtinger.com>
Date: Thu, 11 Nov 2021 21:08:17 +0100
Subject: [PATCH] feat: Add basic content listing code

---
 README.md | 11 +++++++++
 go.mod    |  3 +++
 main.go   | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 82 insertions(+)
 create mode 100644 go.mod
 create mode 100644 main.go

diff --git a/README.md b/README.md
index 548d261..080eacd 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,13 @@
 # stfs
+
 Simple Tape File System, a FUSE based on tar and SQLite for tape drives
+
+## Overview
+
+🚧 This project is a work-in-progress! Instructions will be added as soon as it is usable. 🚧
+
+## License
+
+stfs (c) 2021 Felicitas Pojtinger and contributors
+
+SPDX-License-Identifier: AGPL-3.0
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..6edbb5c
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/pojntfx/stfs
+
+go 1.17
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..be5456f
--- /dev/null
+++ b/main.go
@@ -0,0 +1,68 @@
+package main
+
+import (
+	"archive/tar"
+	"bufio"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+)
+
+func main() {
+	file := flag.String("file", "/dev/st0", "File (tape drive or tar file) to open")
+	blockSize := flag.Int("blockSize", 512, "Size of a block in the tar stream")
+	blockSizeMulitlier := flag.Int("blockSizeMultiplier", 20, "Amount of blocks to read from the tar stream at once")
+
+	flag.Parse()
+
+	fileDescription, err := os.Stat(*file)
+	if err != nil {
+		panic(err)
+	}
+
+	var f *os.File
+	if fileDescription.Mode().IsRegular() {
+		f, err = os.Open(*file)
+		if err != nil {
+			panic(err)
+		}
+	} else {
+		f, err = os.OpenFile(*file, os.O_RDONLY, os.ModeCharDevice)
+		if err != nil {
+			panic(err)
+		}
+	}
+	defer f.Close()
+
+	br := bufio.NewReaderSize(f, *blockSize**blockSizeMulitlier)
+	tr := tar.NewReader(br)
+
+	for {
+		header, err := tr.Next()
+		if err == io.EOF {
+			break
+		}
+
+		if err != nil {
+			panic(err)
+		}
+
+		fmt.Printf(
+			"%v %v %v %v %v %v %v %v %v\n",
+			header.Mode,
+
+			header.Gname,
+			header.Uid,
+			header.Gid,
+
+			header.Size,
+
+			header.ModTime,
+			header.AccessTime,
+			header.ChangeTime,
+
+			header.Name,
+		)
+	}
+}