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/*
* Copyright (c) 2022 Firebuild Inc.
* All rights reserved.
*
* Free for personal use and commercial trial.
* Non-trial commercial use requires licenses available from https://firebuild.com.
* Modification and redistribution are permitted, but commercial use of derivative
* works is subject to the same requirements of this license
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <sys/random.h>
#define TOSTR(x) TOSTR2(x)
#define TOSTR2(x) #x
#define LOC "[" __FILE__ ":" TOSTR(__LINE__) "]"
int main() {
#ifdef __linux__
char buf[4];
ssize_t ret_len = getrandom(buf, sizeof(buf), 0);
if (ret_len == -1) {
perror("getrandom" LOC);
exit(1);
}
assert(ret_len == sizeof(buf));
ret_len = getrandom(buf, sizeof(buf), GRND_RANDOM);
if (ret_len == -1) {
perror("getrandom" LOC);
exit(1);
}
assert(ret_len <= (ssize_t) sizeof(buf)); /* With GRND_RANDOM, short read is possible. */
#endif
return 0;
}
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