1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
4 * Copyright (C) 2015 Cyril Hrubis <[email protected]>
5 * AUTHOR : Dave Baumgartner
6 * CO-PILOT : Barrie Kletscher
7 */
8
9 /*\
10 * [Description]
11 *
12 * Test SIGKILL for these items:
13 * 1. SIGKILL can not be set to be ignored, errno:EINVAL (POSIX).
14 * 2. SIGKILL can not be reset to default, errno:EINVAL (POSIX).
15 * 3. SIGKILL can not be set to be caught, errno:EINVAL (POSIX).
16 * 4. SIGKILL can not be ignored.
17 * 5. SIGKILL is reset to default failed but processed by default.
18 * 6. SIGKILL can not be caught.
19 */
20
21 #include <stdlib.h>
22 #include "tst_test.h"
23
catchsig(int sig)24 static void catchsig(int sig)
25 {
26 (void)sig;
27 }
28
29 static struct tcase {
30 void (*sighandler)(int i);
31 int kill;
32 } tcases[] = {
33 {SIG_IGN, 0},
34 {SIG_DFL, 0},
35 {catchsig, 0},
36 {SIG_IGN, 1},
37 {SIG_DFL, 1},
38 {catchsig, 1},
39 };
40
do_test(unsigned int n)41 static void do_test(unsigned int n)
42 {
43 pid_t pid;
44 int res;
45
46 struct tcase *tc = &tcases[n];
47
48 pid = SAFE_FORK();
49
50 if (!pid) {
51 if (tc->kill) {
52 signal(SIGKILL, tc->sighandler);
53 pause();
54 }
55
56 TST_EXP_FAIL2((long)signal(SIGKILL, tc->sighandler), EINVAL);
57 return;
58 }
59
60 if (!tc->kill) {
61 SAFE_WAITPID(pid, &res, 0);
62 return;
63 }
64
65 TST_PROCESS_STATE_WAIT(pid, 'S', 0);
66 SAFE_KILL(pid, SIGKILL);
67 SAFE_WAITPID(pid, &res, 0);
68
69 if (WIFSIGNALED(res))
70 TST_EXP_EQ_SSZ(WTERMSIG(res), SIGKILL);
71 else
72 tst_res(TFAIL, "Child not killed by signal");
73 }
74
75 static struct tst_test test = {
76 .tcnt = ARRAY_SIZE(tcases),
77 .forks_child = 1,
78 .test = do_test,
79 };
80