| // RUN: %clang -O2 %s -o %t && %run %t |
| // UNSUPPORTED: android, netbsd, darwin, solaris |
| // |
| |
| #include <sys/types.h> |
| #include <errno.h> |
| |
| #if !defined(__GLIBC_PREREQ) |
| #define __GLIBC_PREREQ(a, b) 0 |
| #endif |
| |
| #if (defined(__linux__) && __GLIBC_PREREQ(2, 25)) || defined(__FreeBSD__) |
| #define HAS_GETRANDOM |
| #endif |
| |
| #if defined(HAS_GETRANDOM) |
| #include <sys/random.h> |
| #endif |
| |
| int main() { |
| char buf[16]; |
| ssize_t n = 1; |
| #if defined(HAS_GETRANDOM) |
| n = getrandom(buf, sizeof(buf), 0); |
| if (n == -1 && errno == ENOSYS) |
| n = 1; |
| #endif |
| return (int)(n <= 0); |
| } |
