| 1 | #include "test-tool.h" |
| 2 | #include "git-compat-util.h" |
| 3 | |
| 4 | int cmd__csprng(int argc, const char **argv) |
| 5 | { |
| 6 | unsigned long count; |
| 7 | unsigned char buf[1024]; |
| 8 | |
| 9 | if (argc > 2) { |
| 10 | fprintf(stderr, "usage: %s [<size>]\n", argv[0]); |
| 11 | return 2; |
| 12 | } |
| 13 | |
| 14 | count = (argc == 2) ? strtoul(argv[1], NULL, 0) : ULONG_MAX; |
| 15 | |
| 16 | while (count) { |
| 17 | unsigned long chunk = count < sizeof(buf) ? count : sizeof(buf); |
| 18 | if (csprng_bytes(buf, chunk, 0) < 0) { |
| 19 | perror("failed to read"); |
| 20 | return 5; |
| 21 | } |
| 22 | if (fwrite(buf, chunk, 1, stdout) != chunk) |
| 23 | return 1; |
| 24 | count -= chunk; |
| 25 | } |
| 26 | |
| 27 | return 0; |
| 28 | } |