mirror of
https://github.com/octoleo/syncthing.git
synced 2024-11-06 05:17:49 +00:00
120 lines
2.2 KiB
Go
120 lines
2.2 KiB
Go
// Copyright (C) 2016 The Syncthing Authors.
|
|
//
|
|
// This Source Code Form is subject to the terms of the Mozilla Public
|
|
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
// You can obtain one at https://mozilla.org/MPL/2.0/.
|
|
|
|
package main
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"log"
|
|
"math/rand"
|
|
"os"
|
|
"path/filepath"
|
|
"time"
|
|
)
|
|
|
|
func main() {
|
|
dir := flag.String("dir", "~/files", "Directory to generate into")
|
|
files := flag.Int("files", 1000, "Number of files to create")
|
|
maxExp := flag.Int("maxexp", 20, "Max size exponent")
|
|
src := flag.String("src", "/dev/urandom", "Source of file data")
|
|
flag.Parse()
|
|
if err := generateFiles(*dir, *files, *maxExp, *src); err != nil {
|
|
log.Println(err)
|
|
}
|
|
}
|
|
|
|
func generateFiles(dir string, files, maxexp int, srcname string) error {
|
|
fd, err := os.Open(srcname)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for i := 0; i < files; i++ {
|
|
n := randomName()
|
|
|
|
if rand.Float64() < 0.05 {
|
|
// Some files and directories are dotfiles
|
|
n = "." + n
|
|
}
|
|
|
|
p0 := filepath.Join(dir, string(n[0]), n[0:2])
|
|
err = os.MkdirAll(p0, 0755)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
p1 := filepath.Join(p0, n)
|
|
|
|
s := int64(1 << uint(rand.Intn(maxexp)))
|
|
a := int64(128 * 1024)
|
|
if a > s {
|
|
a = s
|
|
}
|
|
s += rand.Int63n(a)
|
|
|
|
if err := generateOneFile(fd, p1, s); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func generateOneFile(fd io.ReadSeeker, p1 string, s int64) error {
|
|
src := io.LimitReader(&infiniteReader{fd}, s)
|
|
dst, err := os.Create(p1)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = io.Copy(dst, src)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
err = dst.Close()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
os.Chmod(p1, os.FileMode(rand.Intn(0777)|0400))
|
|
|
|
t := time.Now().Add(-time.Duration(rand.Intn(30*86400)) * time.Second)
|
|
return os.Chtimes(p1, t, t)
|
|
}
|
|
|
|
func randomName() string {
|
|
var b [16]byte
|
|
readRand(b[:])
|
|
return fmt.Sprintf("%x", b[:])
|
|
}
|
|
|
|
func readRand(bs []byte) (int, error) {
|
|
var r uint32
|
|
for i := range bs {
|
|
if i%4 == 0 {
|
|
r = uint32(rand.Int63())
|
|
}
|
|
bs[i] = byte(r >> uint((i%4)*8))
|
|
}
|
|
return len(bs), nil
|
|
}
|
|
|
|
type infiniteReader struct {
|
|
rd io.ReadSeeker
|
|
}
|
|
|
|
func (i *infiniteReader) Read(bs []byte) (int, error) {
|
|
n, err := i.rd.Read(bs)
|
|
if err == io.EOF {
|
|
err = nil
|
|
i.rd.Seek(0, 0)
|
|
}
|
|
return n, err
|
|
}
|