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 (buf: thepath, size: sizeof thepath) == NULL) |
41 | { |
42 | if (errno == ERANGE) |
43 | /* The path is too long, skip all tests. */ |
44 | return 0; |
45 | |
46 | puts (s: "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 (size: 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, size: sbs); |
66 | DIAG_POP_NEEDS_COMMENT; |
67 | |
68 | lens[i] = sbs; |
69 | if (bufs[i] == NULL) |
70 | { |
71 | puts (s: "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 (format: "\ |
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 (ptr: 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, size: len) != NULL) |
111 | { |
112 | puts (s: "getcwd (NULL, len) didn't failed" ); |
113 | return 1; |
114 | } |
115 | DIAG_POP_NEEDS_COMMENT; |
116 | |
117 | bufs[0] = malloc (size: len); |
118 | bufs[1] = malloc (size: len); |
119 | bufs[2] = malloc (size: len); |
120 | if (bufs[1] != NULL) |
121 | { |
122 | if (getcwd (buf: bufs[1], size: len) != NULL) |
123 | { |
124 | puts (s: "getcwd (bufs[1], len) didn't failed" ); |
125 | return 1; |
126 | } |
127 | free (ptr: bufs[0]); |
128 | free (ptr: bufs[1]); |
129 | free (ptr: bufs[2]); |
130 | } |
131 | |
132 | memset (thepath, '\xfe', sizeof (thepath)); |
133 | if (getcwd (buf: thepath, size: len) != NULL) |
134 | { |
135 | puts (s: "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 (s: "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, size: len + 1); |
152 | if (bufs[0] == NULL) |
153 | { |
154 | puts (s: "getcwd (NULL, len + 1) failed" ); |
155 | return 1; |
156 | } |
157 | DIAG_POP_NEEDS_COMMENT; |
158 | free (ptr: bufs[0]); |
159 | |
160 | memset (thepath, '\xff', sizeof thepath); |
161 | if (getcwd (buf: thepath, size: len + 1) == NULL) |
162 | { |
163 | puts (s: "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 (format: "thepath[%zd] != '\xff'\n" , i); |
171 | return 1; |
172 | } |
173 | |
174 | puts (s: "everything OK" ); |
175 | |
176 | return 0; |
177 | } |
178 | |
179 | #include "../test-skeleton.c" |
180 | |