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
19 static key_t semkey;
20 static int sem_id = -1;
21 static struct tst_ts timeout;
22
23 struct 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
do_child(int i)36 static 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
sighandler(int sig)59 static void sighandler(int sig)
60 {
61 if (sig != SIGHUP)
62 tst_brk(TBROK, "unexpected signal %d received", sig);
63 }
64
setup(void)65 static 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
cleanup(void)84 static 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
run(unsigned int i)92 static 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
130 static 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