1/*
2 *  This program is free software; you can redistribute it and/or modify
3 *  it under the terms of the GNU General Public License version 2.
4 *
5 *  This program is distributed in the hope that it will be useful,
6 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
7 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
8 *  GNU General Public License for more details.
9 *
10 * Test that the shm_open() function establish a connection between a shared
11 * memory object and a file descriptor.
12 *
13 * Step:
14 *  1. Create a file a shared memory object using shm_open().
15 *  2. Write in the file referenced by the file descriptor return by
16 *     shm_open().
17 *  3. Reopen the file with shm_open().
18 *  4. Read in the file.
19 * The test pass if it read what it was previously written.
20 */
21
22/* ftruncate was formerly an XOPEN extension. We define _XOPEN_SOURCE here to
23   avoid warning if the implementation does not program ftruncate as a base
24   interface */
25#define _XOPEN_SOURCE 600
26
27#include <stdio.h>
28#include <sys/mman.h>
29#include <sys/stat.h>
30#include <unistd.h>
31#include <string.h>
32#include <fcntl.h>
33#include "posixtest.h"
34
35#define BUF_SIZE 8
36#define SHM_NAME "posixtest_1-1"
37
38int main(void)
39{
40	int fd;
41	char str[BUF_SIZE] = "qwerty";
42	char *buf;
43
44	fd = shm_open(SHM_NAME, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
45	if (fd == -1) {
46		perror("An error occurs when calling shm_open()");
47		return PTS_UNRESOLVED;
48	}
49
50	if (ftruncate(fd, BUF_SIZE) != 0) {
51		perror("An error occurs when calling ftruncate()");
52		shm_unlink(SHM_NAME);
53		return PTS_UNRESOLVED;
54	}
55
56	buf = mmap(NULL, BUF_SIZE, PROT_WRITE, MAP_SHARED, fd, 0);
57	if (buf == MAP_FAILED) {
58		perror("An error occurs when calling mmap()");
59		shm_unlink(SHM_NAME);
60		return PTS_UNRESOLVED;
61	}
62
63	strcpy(buf, str);
64
65	fd = shm_open(SHM_NAME, O_RDONLY, S_IRUSR | S_IWUSR);
66	if (fd == -1) {
67		perror("An error occurs when calling shm_open()");
68		shm_unlink(SHM_NAME);
69		return PTS_UNRESOLVED;
70	}
71
72	buf = mmap(NULL, BUF_SIZE, PROT_READ, MAP_SHARED, fd, 0);
73	if (buf == MAP_FAILED) {
74		perror("An error occurs when calling mmap()");
75		shm_unlink(SHM_NAME);
76		return PTS_UNRESOLVED;
77	}
78
79	shm_unlink(SHM_NAME);
80	if (strcmp(buf, str) == 0) {
81		printf("Test PASSED\n");
82		return PTS_PASS;
83	}
84	printf("Test FAILED\n");
85	return PTS_FAIL;
86}
87