60 lines
2.4 KiB
C
60 lines
2.4 KiB
C
/* Copyright 2020 Google LLC
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following disclaimer
|
|
* in the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Google LLC nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "test_skel.h"
|
|
|
|
#define BUFFER_SIZE 256
|
|
|
|
int main(int argc, char *argv[]) {
|
|
char buffer[BUFFER_SIZE];
|
|
// Zero it out so we can check later that it's at least not all 0s.
|
|
memset(buffer, 0, BUFFER_SIZE);
|
|
bool buffer_contains_all_zeros = true;
|
|
|
|
// Don't bother passing any flags. (If we're using lss, we might not have the
|
|
// right header files with the flags defined anyway, and we'd have to copy
|
|
// this in here too, and risk getting out of sync in yet another way.)
|
|
const ssize_t r = sys_getrandom(buffer, BUFFER_SIZE, 0);
|
|
|
|
// Make sure it either worked, or that it's just not supported.
|
|
assert(r == BUFFER_SIZE || errno == ENOSYS);
|
|
|
|
if (r == BUFFER_SIZE) {
|
|
// If all the bytes are 0, it didn't really work.
|
|
for (size_t i = 0; i < BUFFER_SIZE; ++i) {
|
|
if (buffer[i] != 0) {
|
|
buffer_contains_all_zeros = false;
|
|
}
|
|
}
|
|
assert(!buffer_contains_all_zeros);
|
|
}
|
|
|
|
return 0;
|
|
}
|