1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * semop05 - test for EINTR and EIDRM errors
4 *
5 * Copyright (c) International Business Machines  Corp., 2001
6 *	03/2001 - Written by Wayne Boyer
7 *	14/03/2008 Matthieu Fertré (Matthieu.Fertre@irisa.fr)
8 */
9
10#include <stdio.h>
11#include <stdlib.h>
12#include <sys/types.h>
13#include <sys/wait.h>
14#include "tst_test.h"
15#include "libnewipc.h"
16#include "lapi/sem.h"
17#include "semop.h"
18
19static key_t semkey;
20static int sem_id = -1;
21static struct tst_ts timeout;
22
23struct test_case_t {
24	union semun semunptr;
25	short op;
26	short flg;
27	short num;
28	int error;
29} tc[] = {
30	{{1}, 0, 0, 2, EIDRM},
31	{{0}, -1, 0, 3, EIDRM},
32	{{1}, 0, 0, 4, EINTR},
33	{{0}, -1, 0, 5, EINTR}
34};
35
36static void do_child(int i)
37{
38	struct time64_variants *tv = &variants[tst_variant];
39	struct sembuf s_buf = {
40		.sem_op = tc[i].op,
41		.sem_flg = tc[i].flg,
42		.sem_num = tc[i].num,
43	};
44
45	TEST(call_semop(tv, sem_id, &s_buf, 1, tst_ts_get(&timeout)));
46	if (TST_RET != -1) {
47		tst_res(TFAIL, "call succeeded when error expected");
48		exit(0);
49	}
50
51	if (TST_ERR == tc[i].error)
52		tst_res(TPASS | TTERRNO, "expected failure");
53	else
54		tst_res(TFAIL | TTERRNO, "unexpected failure");
55
56	exit(0);
57}
58
59static void sighandler(int sig)
60{
61	if (sig != SIGHUP)
62		tst_brk(TBROK, "unexpected signal %d received", sig);
63}
64
65static void setup(void)
66{
67	struct time64_variants *tv = &variants[tst_variant];
68
69	tst_res(TINFO, "Testing variant: %s", tv->desc);
70	semop_supported_by_kernel(tv);
71
72	timeout.type = tv->ts_type;
73	tst_ts_set_sec(&timeout, 2);
74	tst_ts_set_nsec(&timeout, 10000000);
75
76	SAFE_SIGNAL(SIGHUP, sighandler);
77	semkey = GETIPCKEY();
78
79	sem_id = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA);
80	if (sem_id == -1)
81		tst_brk(TBROK | TERRNO, "couldn't create semaphore in setup");
82}
83
84static void cleanup(void)
85{
86	if (sem_id != -1) {
87		if (semctl(sem_id, 0, IPC_RMID) == -1)
88			tst_res(TWARN, "semaphore deletion failed.");
89	}
90}
91
92static void run(unsigned int i)
93{
94	pid_t pid;
95
96	if (semctl(sem_id, tc[i].num, SETVAL, tc[i].semunptr) == -1)
97		tst_brk(TBROK | TERRNO, "semctl() failed");
98
99	pid = SAFE_FORK();
100
101	if (pid == 0) {
102		do_child(i);
103	} else {
104		TST_PROCESS_STATE_WAIT(pid, 'S', 0);
105
106		/*
107		 * If we are testing for EIDRM then remove
108		 * the semaphore, else send a signal that
109		 * must be caught as we are testing for
110		 * EINTR.
111		 */
112		if (tc[i].error == EIDRM) {
113			/* remove the semaphore resource */
114			cleanup();
115		} else {
116			SAFE_KILL(pid, SIGHUP);
117		}
118
119		waitpid(pid, NULL, 0);
120	}
121
122	if (tc[i].error == EINTR)
123		return;
124
125	sem_id = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA);
126	if (sem_id == -1)
127		tst_brk(TBROK | TERRNO, "couldn't recreate semaphore");
128}
129
130static struct tst_test test = {
131	.test = run,
132	.tcnt = ARRAY_SIZE(tc),
133	.test_variants = ARRAY_SIZE(variants),
134	.setup = setup,
135	.cleanup = cleanup,
136	.needs_tmpdir = 1,
137	.forks_child = 1,
138};
139