about summary refs log tree commit diff
path: root/sysvipc/test-sysvsem.c
blob: d9034c3daeac23c1b047a5d862064825a3185194 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/* Basic tests for SYSV semaphore functions.
   Copyright (C) 2016-2021 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <intprops.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>

#include <test-sysvipc.h>

#include <support/support.h>
#include <support/check.h>
#include <support/temp_file.h>
#include <support/xtime.h>
#include <support/xsignal.h>

/* These are for the temporary file we generate.  */
static char *name;
static int semid;

static void
remove_sem (void)
{
  /* Enforce message queue removal in case of early test failure.
     Ignore error since the sem may already have being removed.  */
  semctl (semid, 0, IPC_RMID, 0);
}

static void
do_prepare (int argc, char *argv[])
{
  int fd = create_temp_file ("tst-sysvsem.", &name);
  if (fd == -1)
    FAIL_EXIT1 ("cannot create temporary file (errno=%d)", errno);
}

#define PREPARE do_prepare

/* It is not an extensive test, but rather a functional one aimed to check
   correct parameter passing on kernel.  */

#define SEM_MODE 0644

union semun
{
  int val;
  struct semid_ds *buf;
  unsigned short  *array;
};

static int
do_test (void)
{
  atexit (remove_sem);

  key_t key = ftok (name, 'G');
  if (key == -1)
    FAIL_EXIT1 ("ftok failed");

  semid = semget(key, 1, IPC_CREAT | IPC_EXCL | SEM_MODE);
  if (semid == -1)
    {
      if (errno == ENOSYS)
	FAIL_UNSUPPORTED ("msgget not supported");
      FAIL_EXIT1 ("semget failed (errno=%d)", errno);
    }

  TEST_COMPARE (semctl (semid, 0, first_sem_invalid_cmd (), NULL), -1);
  TEST_COMPARE (errno, EINVAL);

  /* Get semaphore kernel information and do some sanity checks.  */
  struct semid_ds seminfo;
  if (semctl (semid, 0, IPC_STAT, (union semun) { .buf = &seminfo }) == -1)
    FAIL_EXIT1 ("semctl with IPC_STAT failed (errno=%d)", errno);

  if (seminfo.sem_perm.__key != key)
    FAIL_EXIT1 ("semid_ds::sem_perm::key (%d) != %d",
		(int) seminfo.sem_perm.__key, (int) key);
  if (seminfo.sem_perm.mode != SEM_MODE)
    FAIL_EXIT1 ("semid_ds::sem_perm::mode (%o) != %o",
		seminfo.sem_perm.mode, SEM_MODE);
  if (seminfo.sem_nsems != 1)
    FAIL_EXIT1 ("semid_ds::sem_nsems (%lu) != 1",
		(long unsigned) seminfo.sem_nsems);

  /* Some lock/unlock basic tests.  */
  struct sembuf sb1 = { 0, 1, 0 };
  if (semop (semid, &sb1, 1) == -1)
    FAIL_EXIT1 ("semop failed (errno=%i)", errno);

  struct sembuf sb2 = { 0, -1, 0 };
  if (semop (semid, &sb2, 1) == -1)
    FAIL_EXIT1 ("semop failed (errno=%i)", errno);

#ifdef _GNU_SOURCE
  /* Set a time for half a second.  The semaphore operation should timeout
     with EAGAIN.  */
  {
    struct timespec ts = { 0 /* sec */, 500000000 /* nsec */ };
    if (semtimedop (semid, &sb2, 1, &ts) != -1
        || (errno != EAGAIN && errno != ENOSYS))
      FAIL_EXIT1 ("semtimedop succeed or returned errno != {EAGAIN,ENOSYS} "
		  "(errno=%i)", errno);
  }

  {
    support_create_timer (0, 100000000, false, NULL);
    struct timespec ts = { TYPE_MAXIMUM (time_t), 0 };
    TEST_COMPARE (semtimedop (semid, &sb2, 1, &ts), -1);
    TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
  }
#endif

  /* Finally free up the semnaphore resource.  */
  if (semctl (semid, 0, IPC_RMID, 0) == -1)
    FAIL_EXIT1 ("semctl failed (errno=%d)", errno);

  return 0;
}

#include <support/test-driver.c>