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1 | /* Test of getcwd function. | |
2 | Copyright (C) 2000-2022 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
24 | #include <sys/param.h> | |
25 | #include <libc-diag.h> | |
26 | ||
27 | ||
28 | #define TEST_FUNCTION do_test () | |
29 | static int | |
30 | do_test (void) | |
31 | { | |
32 | char thepath[4096]; /* Yes, this limits the environment this test | |
33 | can run it but I honestly don't care about | |
34 | people which have this problem. */ | |
35 | char *bufs[10]; | |
36 | size_t lens[10]; | |
37 | size_t sbs; | |
38 | size_t len, i; | |
39 | ||
40 | if (getcwd (thepath, sizeof thepath) == NULL) | |
41 | { | |
42 | if (errno == ERANGE) | |
43 | /* The path is too long, skip all tests. */ | |
44 | return 0; | |
45 | ||
46 | puts ("getcwd (thepath, sizeof thepath) failed"); | |
47 | return 1; | |
48 | } | |
49 | len = strlen (thepath); | |
50 | ||
51 | sbs = 1; | |
52 | while (sbs < len + 1) | |
53 | sbs <<= 1; | |
54 | ||
55 | for (i = 0; i < 4; ++i) | |
56 | { | |
57 | lens[i] = sbs; | |
58 | bufs[i] = (char *) malloc (sbs); | |
59 | } | |
60 | ||
61 | /* Avoid warnings about the first argument being null when the second | |
62 | is nonzero. */ | |
63 | DIAG_PUSH_NEEDS_COMMENT; | |
64 | DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull"); | |
65 | bufs[i] = getcwd (NULL, sbs); | |
66 | DIAG_POP_NEEDS_COMMENT; | |
67 | ||
68 | lens[i] = sbs; | |
69 | if (bufs[i] == NULL) | |
70 | { | |
71 | puts ("getcwd (NULL, sbs) failed"); | |
72 | return 1; | |
73 | } | |
74 | ++i; | |
75 | ||
76 | for (; i < 10; sbs >>= 1, ++i) | |
77 | { | |
78 | bufs[i] = (char *) malloc (MAX (1, sbs)); | |
79 | lens[i] = sbs; | |
80 | } | |
81 | ||
82 | /* Before we test the result write something in the memory to see | |
83 | whether the allocation went right. */ | |
84 | for (i = 0; i < 10; ++i) | |
85 | if (i != 4 && bufs[i] != NULL) | |
86 | memset (bufs[i], '\xff', lens[i]); | |
87 | ||
88 | if (strcmp (thepath, bufs[4]) != 0) | |
89 | { | |
90 | printf ("\ | |
91 | getcwd (NULL, sbs) = \"%s\", getcwd (thepath, sizeof thepath) = \"%s\"\n", | |
92 | bufs[4], thepath); | |
93 | return 1; | |
94 | } | |
95 | ||
96 | /* Now overwrite all buffers to see that getcwd allocated the buffer | |
97 | of right size. */ | |
98 | for (i = 0; i < 10; ++i) | |
99 | memset (bufs[i], i, lens[i]); | |
100 | ||
101 | for (i = 0; i < 10; ++i) | |
102 | free (bufs[i]); | |
103 | ||
104 | /* Test whether the function signals success despite the buffer | |
105 | being too small. | |
106 | Avoid warnings about the first argument being null when the second | |
107 | is nonzero. */ | |
108 | DIAG_PUSH_NEEDS_COMMENT; | |
109 | DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull"); | |
110 | if (getcwd (NULL, len) != NULL) | |
111 | { | |
112 | puts ("getcwd (NULL, len) didn't failed"); | |
113 | return 1; | |
114 | } | |
115 | DIAG_POP_NEEDS_COMMENT; | |
116 | ||
117 | bufs[0] = malloc (len); | |
118 | bufs[1] = malloc (len); | |
119 | bufs[2] = malloc (len); | |
120 | if (bufs[1] != NULL) | |
121 | { | |
122 | if (getcwd (bufs[1], len) != NULL) | |
123 | { | |
124 | puts ("getcwd (bufs[1], len) didn't failed"); | |
125 | return 1; | |
126 | } | |
127 | free (bufs[0]); | |
128 | free (bufs[1]); | |
129 | free (bufs[2]); | |
130 | } | |
131 | ||
132 | memset (thepath, '\xfe', sizeof (thepath)); | |
133 | if (getcwd (thepath, len) != NULL) | |
134 | { | |
135 | puts ("getcwd (thepath, len) didn't failed"); | |
136 | return 1; | |
137 | } | |
138 | ||
139 | for (i = len; i < sizeof thepath; ++i) | |
140 | if (thepath[i] != '\xfe') | |
141 | { | |
142 | puts ("thepath[i] != '\xfe'"); | |
143 | return 1; | |
144 | } | |
145 | ||
146 | /* Now test handling of correctly sized buffers. | |
147 | Again. avoid warnings about the first argument being null when | |
148 | the second is nonzero. */ | |
149 | DIAG_PUSH_NEEDS_COMMENT; | |
150 | DIAG_IGNORE_NEEDS_COMMENT (10.1, "-Wnonnull"); | |
151 | bufs[0] = getcwd (NULL, len + 1); | |
152 | if (bufs[0] == NULL) | |
153 | { | |
154 | puts ("getcwd (NULL, len + 1) failed"); | |
155 | return 1; | |
156 | } | |
157 | DIAG_POP_NEEDS_COMMENT; | |
158 | free (bufs[0]); | |
159 | ||
160 | memset (thepath, '\xff', sizeof thepath); | |
161 | if (getcwd (thepath, len + 1) == NULL) | |
162 | { | |
163 | puts ("getcwd (thepath, len + 1) failed"); | |
164 | return 1; | |
165 | } | |
166 | ||
167 | for (i = len + 1; i < sizeof thepath; ++i) | |
168 | if (thepath[i] != '\xff') | |
169 | { | |
170 | printf ("thepath[%zd] != '\xff'\n", i); | |
171 | return 1; | |
172 | } | |
173 | ||
174 | puts ("everything OK"); | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | #include "../test-skeleton.c" |