fuse bug

mut.go

package main

import (
	"io/ioutil"
	"log"
	"os"
	"path/filepath"
)

func main() {
	base := os.Args[1]
	filename := filepath.Join(base, "x")

	log.Printf("Creating: %q", filename)
	f, err := os.Create(filename)
	if err != nil {
		log.Fatalf("Create: %v", err)
	}
	if err := f.Close(); err != nil {
		log.Fatalf("Close: %v", err)
	}

	log.Printf("Statting %q", filename)
	fi, err := os.Stat(filename)
	if err != nil {
		log.Fatalf("Stat error: %v", err)
	} else if !fi.Mode().IsRegular() || fi.Size() != 0 {
		log.Fatalf("Stat of %q = %v size %d; want a %d byte regular file",
			filename, fi.Mode(), fi.Size(), 0)
	}

	log.Printf("Appending to %q", filename)
	for _, str := range []string{"foo, ", "bar\n", "another line.\n"} {
		f, err = os.OpenFile(filename, os.O_WRONLY|os.O_APPEND, 0644)
		if err != nil {
			log.Fatalf("OpenFile: %v", err)
		}
		if _, err := f.Write([]byte(str)); err != nil {
			log.Printf("Error with append: %v", err)
			log.Fatalf("Error appending %q to %s: %v", str, filename, err)
		}
		if err := f.Close(); err != nil {
			log.Fatal(err)
		}
	}

	log.Printf("slurping %q", filename)
	slurp, err := ioutil.ReadFile(filename)
	if err != nil {
		log.Fatal(err)
	}

	log.Printf("Statting %q again", filename)
	const want = "foo, bar\nanother line.\n"
	fi, err = os.Stat(filename)
	if err != nil {
		log.Fatalf("Stat error: %v", err)
	} else if !fi.Mode().IsRegular() || fi.Size() != int64(len(want)) {
		log.Fatalf("Stat of roots/r/x = %v size %d; want a %d byte regular file", fi.Mode(), fi.Size(), len(want))
	}
	if got := string(slurp); got != want {
		log.Fatalf("contents = %q; want %q", got, want)
	}

	log.Printf("Deleting %q", filename)
	// Delete ilog.
	if err := os.Remove(filename); err != nil {
		log.Fatal(err)
	}

	log.Printf("Final stat of %q", filename)
	// Gone?
	if _, err := os.Stat(filename); !os.IsNotExist(err) {
		log.Fatalf("expected file to be gone; got stat err = %v instead", err)
	}

}