}

		m.handlers.single[id] = h
		return nil
	}
	subID := makeSubHandlerID(id, s)
	if m.handlers.hasSubhandler(subID) && !id.isTestHandler() {
		return fmt.Errorf("handler %v, subroute:%v: %w", id.String(), s, ErrHandlerAlreadyExists)
	}
	m.handlers.subSingle[subID] = h
	// Copy so clients can also pick it up for other subpaths.
	m.handlers.subSingle[makeZeroSubHandlerID(id)] = h

	}
	// Extract subroute if any.
	if m.Flags&FlagSubroute != 0 {
		if len(h) < 32 {
			return nil, nil, fmt.Errorf("want subroute len 32, got %v", len(h))
		}
		subID := (*[32]byte)(h[len(h)-32:])
		sub = (*subHandlerID)(subID)
		// Add if more modifications to h is needed
		h = h[:len(h)-32]
	}
	return sub, h, nil
}

// setZeroPayloadFlag will clear or set the FlagPayloadIsZero if

		{call: "Seteuid(1)", fn: func() error { return syscall.Seteuid(1) }, filter: "Uid:", expect: "\t0\t1\t0\t1"},
		{call: "Setuid(0)", fn: func() error { return syscall.Setuid(0) }, filter: "Uid:", expect: "\t0\t0\t0\t0"},

		{call: "Setgid(1)", fn: func() error { return syscall.Setgid(1) }, filter: "Gid:", expect: "\t1\t1\t1\t1"},

	//
	// In this example, `33a58b40-aecc-4c9f-a22f-ff17bfa33b62` directory contains
	// temporary objects from one of the previous runs of minio server.
	tmpID := mustGetUUID()
	tmpOld := pathJoin(diskPath, minioMetaTmpBucket+"-old", tmpID)
	if err := renameAll(pathJoin(diskPath, minioMetaTmpBucket),
		tmpOld, diskPath); err != nil && !errors.Is(err, errFileNotFound) {

		Method: Store,
		Mode:   0666,
	},
	{
		Name:   "bar",
		Data:   nil, // large data set in the test
		Method: Deflate,
		Mode:   0644,
	},
	{
		Name:   "setuid",
		Data:   []byte("setuid file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSetuid,
	},
	{
		Name:   "setgid",
		Data:   []byte("setgid file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSetgid,
	},
	{

		if !nfi.IsRemote() {
			nfi.Data = nil
			nfi.Erasure.Index = 0
			nfi.Erasure.Checksums = nil
		}
		return nfi
	}

	// We write at temporary location and then rename to final location.
	tmpID := mustGetUUID()
	migrateDataDir := mustGetUUID()

	// Reorder so that we have data disks first and parity disks next.
	if !latestMeta.Deleted && len(latestMeta.Erasure.Distribution) != len(availableDisks) {

	// Set file permission bits.
	mode = fs.FileMode(fi.h.Mode).Perm()

	// Set setuid, setgid and sticky bits.
	if fi.h.Mode&c_ISUID != 0 {
		mode |= fs.ModeSetuid
	}
	if fi.h.Mode&c_ISGID != 0 {
		mode |= fs.ModeSetgid
	}
	if fi.h.Mode&c_ISVTX != 0 {
		mode |= fs.ModeSticky
	}

	// Set file mode bits; clear perm, setuid, setgid, and sticky bits.
	switch m := fs.FileMode(fi.h.Mode) &^ 07777; m {

	case OpRequest:
		c.handleRequest(ctx, m, subID)
	case OpAckMux:
		c.handleAckMux(ctx, m)
	case OpConnectMux:
		c.handleConnectMux(ctx, m, subID)
	case OpMuxConnectError:
		c.handleConnectMuxError(ctx, m)
	default:
		gridLogIf(ctx, fmt.Errorf("unknown message type: %v", m.Op))
	}
}

func (c *Connection) handleConnectMux(ctx context.Context, m message, subID *subHandlerID) {
	// Stateless stream:

		h: &Header{
			Name:     "dev/initctl",
			Mode:     0600,
			Size:     0,
			ModTime:  time.Unix(1360578949, 0),
			Typeflag: TypeFifo,
		},
		fm: 0600 | fs.ModeNamedPipe,
	}, {
		// setuid.
		h: &Header{
			Name:     "bin/su",
			Mode:     0755 | c_ISUID,
			Size:     23232,
			ModTime:  time.Unix(1355405093, 0),
			Typeflag: TypeReg,
		},
		fm: 0755 | fs.ModeSetuid,
	}, {

		multipartResponse := &InitiateMultipartUploadResponse{}
		err = decoder.Decode(multipartResponse)
		if err != nil {
			t.Fatalf("Error decoding the recorded response Body")
		}
		upID := multipartResponse.UploadID

		// Upload each part
		var cp []CompletePart
		cumulativeSum := int64(0)
		for i, partLen := range partSizes {
			partID := i + 1