1*49cdfc7eSAndroid Build Coastguard Worker // SPDX-License-Identifier: GPL-2.0-only
2*49cdfc7eSAndroid Build Coastguard Worker /*
3*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
4*49cdfc7eSAndroid Build Coastguard Worker * Copyright (c) Linux Test Project, 2006-2023
5*49cdfc7eSAndroid Build Coastguard Worker */
6*49cdfc7eSAndroid Build Coastguard Worker
7*49cdfc7eSAndroid Build Coastguard Worker /*\
8*49cdfc7eSAndroid Build Coastguard Worker * [Description]
9*49cdfc7eSAndroid Build Coastguard Worker *
10*49cdfc7eSAndroid Build Coastguard Worker * Test whether parent process id that getppid() returns is out of range.
11*49cdfc7eSAndroid Build Coastguard Worker */
12*49cdfc7eSAndroid Build Coastguard Worker
13*49cdfc7eSAndroid Build Coastguard Worker #include <errno.h>
14*49cdfc7eSAndroid Build Coastguard Worker #include "tst_test.h"
15*49cdfc7eSAndroid Build Coastguard Worker
16*49cdfc7eSAndroid Build Coastguard Worker static pid_t pid_max;
17*49cdfc7eSAndroid Build Coastguard Worker
setup(void)18*49cdfc7eSAndroid Build Coastguard Worker static void setup(void)
19*49cdfc7eSAndroid Build Coastguard Worker {
20*49cdfc7eSAndroid Build Coastguard Worker SAFE_FILE_SCANF("/proc/sys/kernel/pid_max", "%d\n", &pid_max);
21*49cdfc7eSAndroid Build Coastguard Worker }
22*49cdfc7eSAndroid Build Coastguard Worker
verify_getppid(void)23*49cdfc7eSAndroid Build Coastguard Worker static void verify_getppid(void)
24*49cdfc7eSAndroid Build Coastguard Worker {
25*49cdfc7eSAndroid Build Coastguard Worker pid_t ppid;
26*49cdfc7eSAndroid Build Coastguard Worker
27*49cdfc7eSAndroid Build Coastguard Worker ppid = getppid();
28*49cdfc7eSAndroid Build Coastguard Worker if (ppid > pid_max)
29*49cdfc7eSAndroid Build Coastguard Worker tst_res(TFAIL, "getppid() returned %d, out of range!", ppid);
30*49cdfc7eSAndroid Build Coastguard Worker else
31*49cdfc7eSAndroid Build Coastguard Worker tst_res(TPASS, "getppid() returned %d", ppid);
32*49cdfc7eSAndroid Build Coastguard Worker }
33*49cdfc7eSAndroid Build Coastguard Worker
34*49cdfc7eSAndroid Build Coastguard Worker static struct tst_test test = {
35*49cdfc7eSAndroid Build Coastguard Worker .setup = setup,
36*49cdfc7eSAndroid Build Coastguard Worker .test_all = verify_getppid,
37*49cdfc7eSAndroid Build Coastguard Worker };
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