stpncpy_test.c revision 290875 
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: stable/10/lib/libc/tests/string/stpncpy_test.c 290875 2015-11-15 20:08:34Z ngie $");
29
30#include <sys/param.h>
31#include <sys/mman.h>
32#include <assert.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36
37#include <atf-c.h>
38
39static char *
40makebuf(size_t len, int guard_at_end)
41{
42	char *buf;
43	size_t alloc_size = roundup2(len, PAGE_SIZE) + PAGE_SIZE;
44
45	buf = mmap(NULL, alloc_size, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
46	assert(buf);
47	if (guard_at_end) {
48		assert(munmap(buf + alloc_size - PAGE_SIZE, PAGE_SIZE) == 0);
49		return (buf + alloc_size - PAGE_SIZE - len);
50	} else {
51		assert(munmap(buf, PAGE_SIZE) == 0);
52		return (buf + PAGE_SIZE);
53	}
54}
55
56static void
57test_stpncpy(const char *s)
58{
59	char *src, *dst;
60	size_t size, len, bufsize, x;
61	int i, j;
62
63	size = strlen(s) + 1;
64	for (i = 0; i <= 1; i++) {
65		for (j = 0; j <= 1; j++) {
66			for (bufsize = 0; bufsize <= size + 10; bufsize++) {
67				src = makebuf(size, i);
68				memcpy(src, s, size);
69				dst = makebuf(bufsize, j);
70				memset(dst, 'X', bufsize);
71				len = (bufsize < size) ? bufsize : size - 1;
72				assert(stpncpy(dst, src, bufsize) == dst+len);
73				assert(memcmp(src, dst, len) == 0);
74				for (x = len; x < bufsize; x++)
75					assert(dst[x] == '\0');
76			}
77		}
78	}
79}
80
81ATF_TC_WITHOUT_HEAD(nul);
82ATF_TC_BODY(nul, tc)
83{
84
85	test_stpncpy("");
86}
87
88ATF_TC_WITHOUT_HEAD(foo);
89ATF_TC_BODY(foo, tc)
90{
91
92	test_stpncpy("foo");
93}
94
95ATF_TC_WITHOUT_HEAD(glorp);
96ATF_TC_BODY(glorp, tc)
97{
98
99	test_stpncpy("glorp");
100}
101
102ATF_TP_ADD_TCS(tp)
103{
104
105	ATF_TP_ADD_TC(tp, nul);
106	ATF_TP_ADD_TC(tp, foo);
107	ATF_TP_ADD_TC(tp, glorp);
108
109	return (atf_no_error());
110}
111