generate brutally incoherent timestamped line data

main.go

package main

import (
	"fmt"
	"flag"
	"math/rand"
	"time"
	"log"
	"os"
)

const (
	mil int64 = 1000000
)

var (
	fcnt = flag.Int("c", 1000, "Line count")
	fpath = flag.String("o", "", "output file path")
)

func init() {
	flag.Parse()
	if *fcnt <= 0 {
		log.Fatal("invalid count")
	}
	if *fpath == `` {
		log.Fatal("Invalid path")
	}
	rand.Seed(time.Now().UnixNano())
}

func main() {
	fout, err := os.Create(*fpath)
	if err != nil {
		log.Fatal(err)
	}
	var offset int
	var n int
	for i := 0; i < *fcnt; i++ {
		b := make([]byte, rand.Intn(1024))
		rand.Read(b)
		fmt.Printf("%x\n", offset)
		n, _ = fmt.Fprintf(fout, "%d,", time.Now().UnixNano()/mil)
		offset += n
		n, _ = fout.Write(b)
		offset += n
		n, _ = fmt.Fprintf(fout, "\n")
		offset += n
	}
	if err = fout.Close(); err != nil {
		log.Fatal(err)
	}
}