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_unlink() function sets errno = ENAMETOOLONG if the length
11 * of the name argument exceeds {PATH_MAX} (including the terminating null).
12 *
13 * The used name follow the scheme:
14 * aaaaaa/aaaaaa/aaaaaa/aaa ...
15 */
16
17#include <stdio.h>
18#include <sys/mman.h>
19#include <sys/stat.h>
20#include <fcntl.h>
21#include <errno.h>
22#include <limits.h>
23#include <unistd.h>
24#include <stdlib.h>
25#include "posixtest.h"
26
27/* Ensure that each component length is short enough */
28#define COMPONENT_SIZE _POSIX_NAME_MAX
29
30int main() {
31	int result, i, path_max;
32	char *shm_name;
33
34	path_max = pathconf("/", _PC_PATH_MAX);
35	if(path_max == -1) {
36		perror("An error occurs when calling pathconf()");
37		return PTS_UNRESOLVED;
38        }
39	shm_name = malloc(path_max+1);
40
41	for(i=0; i<path_max; i++)
42		shm_name[i] = (i+1)%COMPONENT_SIZE ? 'a' : '/';
43	shm_name[path_max+1] = 0;
44
45	result = shm_unlink(shm_name);
46
47	if(result == -1 && errno == ENAMETOOLONG) {
48		printf("Test PASSED\n");
49		return PTS_PASS;
50	} else if(result != -1) {
51		printf("shm_unlink() success.\n");
52		return PTS_FAIL;
53	}
54
55	perror("shm_unlink");
56	return PTS_FAIL;
57}
58