1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <random> 11 12 // class random_device; 13 14 // explicit random_device(const string& token = "/dev/urandom"); 15 16 #include <random> 17 #include <cassert> 18 #include <unistd.h> 19 main()20int main() 21 { 22 try 23 { 24 std::random_device r("wrong file"); 25 assert(false); 26 } 27 catch (const std::system_error& e) 28 { 29 } 30 { 31 std::random_device r; 32 } 33 { 34 int ec; 35 ec = close(STDIN_FILENO); 36 assert(!ec); 37 ec = close(STDOUT_FILENO); 38 assert(!ec); 39 ec = close(STDERR_FILENO); 40 assert(!ec); 41 std::random_device r; 42 } 43 { 44 std::random_device r("/dev/urandom");; 45 } 46 { 47 std::random_device r("/dev/random");; 48 } 49 } 50