diff options
Diffstat (limited to 'src/ci/docker/scripts/qemu-bare-bones-addentropy.c')
-rw-r--r-- | src/ci/docker/scripts/qemu-bare-bones-addentropy.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/ci/docker/scripts/qemu-bare-bones-addentropy.c b/src/ci/docker/scripts/qemu-bare-bones-addentropy.c new file mode 100644 index 000000000..815b5b04f --- /dev/null +++ b/src/ci/docker/scripts/qemu-bare-bones-addentropy.c @@ -0,0 +1,33 @@ +#include <assert.h> +#include <stdint.h> +#include <sys/ioctl.h> +#include <stdio.h> +#include <unistd.h> +#include <fcntl.h> +#include <linux/random.h> + +#define N 2048 + +struct entropy { + int ent_count; + int size; + unsigned char data[N]; +}; + +int main() { + struct entropy buf; + ssize_t n; + + int random_fd = open("/dev/random", O_RDWR); + assert(random_fd >= 0); + + while ((n = read(0, &buf.data, N)) > 0) { + buf.ent_count = n * 8; + buf.size = n; + if (ioctl(random_fd, RNDADDENTROPY, &buf) != 0) { + perror("failed to add entropy"); + } + } + + return 0; +} |