func main() {
myflags := flag.NewFlagSet("tfsum", flag.ExitOnError)
cfg := &tf.TfsumConfig{}
cfg.DefineFlags(myflags)
err := myflags.Parse(os.Args[1:])
err = cfg.ValidateConfig()
if err != nil || cfg.Help {
usage(err, myflags)
}
leftover := myflags.Args()
//p("leftover = %v", leftover)
if len(leftover) != 0 {
fmt.Fprintf(os.Stderr, "tfsum reads stdin and writes stdout, no args allowed.\n")
showUse(myflags)
os.Exit(1)
}
i := int64(1)
f := os.Stdin
panicOn(err)
buf := make([]byte, 1024*1024)
fr := tf.NewFrameReader(f, 1024*1024)
var frame tf.Frame
for ; err == nil; i++ {
_, _, err, _ = fr.NextFrame(&frame)
if err != nil {
if err == io.EOF {
return
}
fmt.Fprintf(os.Stderr, "tfcat error from fr.NextFrame() at i=%v: '%v'\n", i, err)
os.Exit(1)
}
hash := frame.Blake2b()
chk := int64(binary.LittleEndian.Uint64(hash[:8]))
newf, err := tf.NewMarshalledFrame(buf, time.Unix(0, frame.Tm()), tf.EvOneInt64, 0, chk, nil)
panicOn(err)
_, err = os.Stdout.Write(newf)
panicOn(err)
}
}
