1/*-
2 * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/mman.h>
31#include <sys/param.h>
32#include <assert.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36
37static char *
38makebuf(size_t len, int guard_at_end)
39{
40	char *buf;
41	size_t alloc_size = roundup2(len, PAGE_SIZE) + PAGE_SIZE;
42
43	buf = mmap(NULL, alloc_size, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
44	assert(buf);
45	if (guard_at_end) {
46		assert(munmap(buf + alloc_size - PAGE_SIZE, PAGE_SIZE) == 0);
47		return (buf + alloc_size - PAGE_SIZE - len);
48	} else {
49		assert(munmap(buf, PAGE_SIZE) == 0);
50		return (buf + PAGE_SIZE);
51	}
52}
53
54static void
55test_stpncpy(const char *s)
56{
57	char *src, *dst;
58	size_t size, len, bufsize, x;
59	int i, j;
60
61	size = strlen(s) + 1;
62	for (i = 0; i <= 1; i++) {
63		for (j = 0; j <= 1; j++) {
64			for (bufsize = 0; bufsize <= size + 10; bufsize++) {
65				src = makebuf(size, i);
66				memcpy(src, s, size);
67				dst = makebuf(bufsize, j);
68				memset(dst, 'X', bufsize);
69				len = (bufsize < size) ? bufsize : size - 1;
70				assert(stpncpy(dst, src, bufsize) == dst+len);
71				assert(memcmp(src, dst, len) == 0);
72				for (x = len; x < bufsize; x++)
73					assert(dst[x] == '\0');
74			}
75		}
76	}
77}
78
79int
80main(int argc, char *argv[])
81{
82
83	printf("1..3\n");
84
85	test_stpncpy("");
86	printf("ok 1 - stpncpy\n");
87	test_stpncpy("foo");
88	printf("ok 2 - stpncpy\n");
89	test_stpncpy("glorp");
90	printf("ok 3 - stpncpy\n");
91
92	exit(0);
93}
94