xref: /aosp_15_r20/external/ltp/testcases/kernel/syscalls/waitid/waitid04.c (revision 49cdfc7efb34551c7342be41a7384b9c40d7cab7)
1*49cdfc7eSAndroid Build Coastguard Worker // SPDX-License-Identifier: GPL-2.0-or-later
2*49cdfc7eSAndroid Build Coastguard Worker /*
3*49cdfc7eSAndroid Build Coastguard Worker  * Copyright (c) Crackerjack Project., 2007
4*49cdfc7eSAndroid Build Coastguard Worker  * Copyright (c) Manas Kumar Nayak [email protected]>
5*49cdfc7eSAndroid Build Coastguard Worker  * Copyright (C) 2021 SUSE LLC Andrea Cervesato <[email protected]>
6*49cdfc7eSAndroid Build Coastguard Worker  */
7*49cdfc7eSAndroid Build Coastguard Worker 
8*49cdfc7eSAndroid Build Coastguard Worker /*\
9*49cdfc7eSAndroid Build Coastguard Worker  * [Description]
10*49cdfc7eSAndroid Build Coastguard Worker  *
11*49cdfc7eSAndroid Build Coastguard Worker  * This test if waitid() syscall leaves the si_pid set to 0 with WNOHANG flag
12*49cdfc7eSAndroid Build Coastguard Worker  * when no child was waited for.
13*49cdfc7eSAndroid Build Coastguard Worker  */
14*49cdfc7eSAndroid Build Coastguard Worker 
15*49cdfc7eSAndroid Build Coastguard Worker #include <sys/wait.h>
16*49cdfc7eSAndroid Build Coastguard Worker #include "tst_test.h"
17*49cdfc7eSAndroid Build Coastguard Worker 
18*49cdfc7eSAndroid Build Coastguard Worker static siginfo_t *infop;
19*49cdfc7eSAndroid Build Coastguard Worker 
run(void)20*49cdfc7eSAndroid Build Coastguard Worker static void run(void)
21*49cdfc7eSAndroid Build Coastguard Worker {
22*49cdfc7eSAndroid Build Coastguard Worker 	pid_t pid_child;
23*49cdfc7eSAndroid Build Coastguard Worker 
24*49cdfc7eSAndroid Build Coastguard Worker 	pid_child = SAFE_FORK();
25*49cdfc7eSAndroid Build Coastguard Worker 	if (!pid_child) {
26*49cdfc7eSAndroid Build Coastguard Worker 		TST_CHECKPOINT_WAIT(0);
27*49cdfc7eSAndroid Build Coastguard Worker 		return;
28*49cdfc7eSAndroid Build Coastguard Worker 	}
29*49cdfc7eSAndroid Build Coastguard Worker 
30*49cdfc7eSAndroid Build Coastguard Worker 	memset(infop, 0, sizeof(*infop));
31*49cdfc7eSAndroid Build Coastguard Worker 	TST_EXP_PASS(waitid(P_ALL, pid_child, infop, WNOHANG | WEXITED));
32*49cdfc7eSAndroid Build Coastguard Worker 
33*49cdfc7eSAndroid Build Coastguard Worker 	TST_EXP_EQ_LI(infop->si_pid, 0);
34*49cdfc7eSAndroid Build Coastguard Worker 
35*49cdfc7eSAndroid Build Coastguard Worker 	TST_CHECKPOINT_WAKE(0);
36*49cdfc7eSAndroid Build Coastguard Worker }
37*49cdfc7eSAndroid Build Coastguard Worker 
38*49cdfc7eSAndroid Build Coastguard Worker static struct tst_test test = {
39*49cdfc7eSAndroid Build Coastguard Worker 	.test_all = run,
40*49cdfc7eSAndroid Build Coastguard Worker 	.forks_child = 1,
41*49cdfc7eSAndroid Build Coastguard Worker 	.needs_checkpoints = 1,
42*49cdfc7eSAndroid Build Coastguard Worker 	.bufs = (struct tst_buffers[]) {
43*49cdfc7eSAndroid Build Coastguard Worker 		{&infop, .size = sizeof(*infop)},
44*49cdfc7eSAndroid Build Coastguard Worker 		{}
45*49cdfc7eSAndroid Build Coastguard Worker 	}
46*49cdfc7eSAndroid Build Coastguard Worker };
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