1 /*
2 * Test printpath/umovestr.
3 *
4 * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2017-2018 The strace developers.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "tests.h"
32
33 #include <limits.h>
34 #include <stdio.h>
35 #include <string.h>
36 #include <unistd.h>
37
38 #include "test_ucopy.h"
39
40 static void
test_printpath_at(char * const p,const unsigned int test_max)41 test_printpath_at(char *const p, const unsigned int test_max)
42 {
43 /*
44 * /
45 * /.
46 * /..
47 * /...
48 * /../.
49 * /../..
50 * /../../
51 */
52
53 char *const eop = p + (test_max - 1);
54 *eop = '\0';
55 unsigned int i;
56 for (i = 1; i < test_max; ++i) {
57 const unsigned int i_1 = i - 1;
58 memmove(eop - i, eop - i_1, i_1);
59 eop[-1] = "/.."[i_1 % 3];
60 if (chdir(eop - i))
61 perror_msg_and_fail("chdir");
62 printf("chdir(\"%s\") = 0\n", eop - i);
63 }
64 }
65
66 static void
test_efault(const unsigned int test_max)67 test_efault(const unsigned int test_max)
68 {
69 char *p = tail_alloc(test_max);
70 const char *const efault = p + test_max;
71 memset(p, '/', test_max);
72
73 for (; p <= efault; ++p) {
74 if (p <= efault - PATH_MAX)
75 continue;
76 printf("chdir(%p) = %s\n", p, sprintrc(chdir(p)));
77 }
78 }
79
80 static void
test_enametoolong(void)81 test_enametoolong(void)
82 {
83 char *p = tail_alloc(PATH_MAX);
84 memset(p, '/', PATH_MAX);
85
86 printf("chdir(\"%.*s\"...) = %s\n",
87 PATH_MAX - 1, p, sprintrc(chdir(p)));
88 }
89
90 void
test_printpath(const unsigned int test_max)91 test_printpath(const unsigned int test_max)
92 {
93 /*
94 * /../..|
95 * /../.|.
96 * /../|..
97 * /..|/..
98 * /.|./..
99 * /|../..
100 * |/../..
101 */
102 const unsigned int page_size = get_page_size();
103 char *p = tail_alloc(test_max + page_size);
104 unsigned int i;
105 for (i = 1; i < sizeof(long); ++i)
106 test_printpath_at(p + i, test_max);
107 for (i = 0; i < sizeof(long); ++i)
108 test_printpath_at(p + page_size - i, test_max);
109 test_efault(test_max);
110 test_enametoolong();
111 }
112