random seeding
| 21 | |
| 22 | // random seeding |
| 23 | int64_t cluster_seedgen(void) { |
| 24 | int64_t s, seed, pid; |
| 25 | FILE* f = fopen("/dev/urandom", "rb"); |
| 26 | if (f && fread(&seed, 1, sizeof(seed), f) == sizeof(seed)) { |
| 27 | fclose(f); |
| 28 | return seed; |
| 29 | } |
| 30 | |
| 31 | LOG(INFO) << "System entropy source not available, " |
| 32 | "using fallback algorithm to generate seed instead."; |
| 33 | if (f) |
| 34 | fclose(f); |
| 35 | |
| 36 | pid = getpid(); |
| 37 | s = time(NULL); |
| 38 | seed = std::abs(((s * 181) * ((pid - 83) * 359)) % 104729); |
| 39 | return seed; |
| 40 | } |
| 41 | |
| 42 | |
| 43 | void GlobalInit(int* pargc, char*** pargv) { |