1 /*
2 * Copyright (C) 2015 Cedric Hnyda ced.hnyda@gmail.com
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 *
23 */
24
25 /*
26 * AUTHOR : Cédric Hnyda
27 * DATE STARTED : 06/13/2015
28 *
29 * Calls getrandom(2) after having limited the number of available file
30 * descriptors to 3 and expects success.
31 */
32
33 #include <sys/resource.h>
34 #include "lapi/getrandom.h"
35 #include "lapi/syscalls.h"
36 #include "tst_test.h"
37
verify_getrandom(void)38 static void verify_getrandom(void)
39 {
40 char buf[128];
41 struct rlimit lold, lnew;
42
43 SAFE_GETRLIMIT(RLIMIT_NOFILE, &lold);
44 lnew.rlim_max = lold.rlim_max;
45 lnew.rlim_cur = 3;
46 SAFE_SETRLIMIT(RLIMIT_NOFILE, &lnew);
47
48 TEST(tst_syscall(__NR_getrandom, buf, 100, 0));
49 if (TST_RET == -1)
50 tst_res(TFAIL | TTERRNO, "getrandom failed");
51 else
52 tst_res(TPASS, "getrandom returned %ld", TST_RET);
53
54 SAFE_SETRLIMIT(RLIMIT_NOFILE, &lold);
55 }
56
57 static struct tst_test test = {
58 .test_all = verify_getrandom,
59 };
60