diff options
Diffstat (limited to 'util/nvmutil/nvmutil.c')
| -rw-r--r-- | util/nvmutil/nvmutil.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c index 77b33aa2..38d34436 100644 --- a/util/nvmutil/nvmutil.c +++ b/util/nvmutil/nvmutil.c @@ -141,9 +141,12 @@ rhex(void) { static int rfd = -1, n = 0; static uint8_t rnum[16]; - xopen(rfd, "/dev/urandom", O_RDONLY); - if (!n) + if (!n) { + if (rfd == -1) { + xopen(rfd, "/dev/urandom", O_RDONLY); + } xpread(rfd, (uint8_t *) &rnum, (n = 15) + 1, 0, "/dev/urandom"); + } return rnum[n--] & 0xf; } |