1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) Linux Test Project, 2009-2021
4 * Copyright (c) Crackerjack Project, 2007
5 * Ported from Crackerjack to LTP by Manas Kumar Nayak maknayak@in.ibm.com>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Basic tests for the tkill syscall.
12 *
13 * [Algorithm]
14 *
15 * Calls tkill and capture signal to verify success.
16 */
17
18 #include <signal.h>
19
20 #include "lapi/syscalls.h"
21 #include "tst_test.h"
22
23 static volatile sig_atomic_t sig_flag;
24
sighandler(int sig)25 static void sighandler(int sig)
26 {
27 if (sig == SIGUSR1)
28 sig_flag = 1;
29 }
30
setup(void)31 static void setup(void)
32 {
33 SAFE_SIGNAL(SIGUSR1, sighandler);
34 }
35
run(void)36 static void run(void)
37 {
38 int tid;
39 int timeout_ms = 1000;
40 sig_flag = 0;
41
42 tid = tst_syscall(__NR_gettid);
43 TST_EXP_PASS(tst_syscall(__NR_tkill, tid, SIGUSR1));
44
45 while (timeout_ms--) {
46 if (sig_flag)
47 break;
48
49 usleep(1000);
50 }
51
52 if (sig_flag)
53 tst_res(TPASS, "signal captured");
54 else
55 tst_res(TFAIL, "signal not captured");
56 }
57
58 static struct tst_test test = {
59 .needs_tmpdir = 1,
60 .setup = setup,
61 .test_all = run,
62 };
63