/* 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 http://mozilla.org/MPL/2.0/. */

package startup

import (
	cryptorand "crypto/rand"
	"encoding/binary"
	"math/rand"

	"github.com/pkg/errors"
)

// RandSeed default math/rand PRNG.
func RandSeed() error {
	seed := make([]byte, 8)
	if _, err := cryptorand.Read(seed); err != nil {
		return errors.Wrap(err, "error seeding rand")
	}

	rand.Seed(int64(binary.LittleEndian.Uint64(seed)))

	return nil
}