1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * Ported to LTP: Wayne Boyer
5 * Copyright (c) 2016 Cyril Hrubis <chrubis@suse.cz>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Verify that, nice(2) fails when, a non-root user attempts to increase
12 * the priority of a process by specifying a negative increment value.
13 */
14 #include <pwd.h>
15 #include <unistd.h>
16 #include <errno.h>
17 #include "tst_test.h"
18
19 #define NICEINC -10
20
verify_nice(void)21 static void verify_nice(void)
22 {
23 TEST(nice(NICEINC));
24
25 if (TST_RET != -1) {
26 tst_res(TFAIL, "nice(%i) succeded unexpectedly (returned %li)",
27 NICEINC, TST_RET);
28 return;
29 }
30
31 if (TST_ERR != EPERM) {
32 tst_res(TFAIL | TTERRNO, "nice(%i) should fail with EPERM",
33 NICEINC);
34 return;
35 }
36
37 tst_res(TPASS, "nice(%i) failed with EPERM", NICEINC);
38 }
39
setup(void)40 static void setup(void)
41 {
42 struct passwd *ltpuser;
43
44 ltpuser = SAFE_GETPWNAM("nobody");
45 SAFE_SETUID(ltpuser->pw_uid);
46 }
47
48 static struct tst_test test = {
49 .setup = setup,
50 .test_all = verify_nice,
51 .needs_root = 1,
52 };
53