1 /* 2 * Copyright (c) 2015 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifdef HAVE_CONFIG_H 29 # include "config.h" 30 #endif 31 32 #include <stdio.h> 33 #include <unistd.h> 34 #include <sys/syscall.h> 35 36 int 37 main(void) 38 { 39 #ifdef __NR_getrandom 40 unsigned char buf[4]; 41 42 if (syscall(__NR_getrandom, buf, sizeof(buf) - 1, 0) != sizeof(buf) - 1) 43 return 77; 44 printf("getrandom(\"\\x%02x\\x%02x\\x%02x\", 3, 0) = 3\n", 45 (int) buf[0], (int) buf[1], (int) buf[2]); 46 47 if (syscall(__NR_getrandom, buf, sizeof(buf), 1) != sizeof(buf)) 48 return 77; 49 printf("getrandom(\"\\x%02x\\x%02x\\x%02x\"..., 4, GRND_NONBLOCK) = 4\n", 50 (int) buf[0], (int) buf[1], (int) buf[2]); 51 52 if (syscall(__NR_getrandom, buf, sizeof(buf), 0x3003) != -1) 53 return 77; 54 printf("getrandom(%p, 4, GRND_NONBLOCK|GRND_RANDOM|0x3000) = " 55 "-1 EINVAL (Invalid argument)\n", buf); 56 57 puts("+++ exited with 0 +++"); 58 return 0; 59 #else 60 return 77; 61 #endif 62 } 63
