1 | /* Test program for returning the canonical absolute name of a given file. |
2 | Copyright (C) 1996-2022 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 | /* This file must be run from within a directory called "stdlib". */ |
20 | |
21 | #include <errno.h> |
22 | #include <fcntl.h> |
23 | #include <stdio.h> |
24 | #include <stdlib.h> |
25 | #include <string.h> |
26 | #include <unistd.h> |
27 | #include <sys/param.h> |
28 | #include <sys/stat.h> |
29 | |
30 | /* Prototype for our test function. */ |
31 | extern int do_test (int argc, char *argv[]); |
32 | #include <test-skeleton.c> |
33 | |
34 | #ifndef PATH_MAX |
35 | # define PATH_MAX 4096 |
36 | #endif |
37 | static char cwd[PATH_MAX]; |
38 | static size_t cwd_len; |
39 | |
40 | struct { |
41 | const char * name; |
42 | const char * value; |
43 | } symlinks[] = { |
44 | {"SYMLINK_LOOP" , "SYMLINK_LOOP" }, |
45 | {"SYMLINK_1" , "." }, |
46 | {"SYMLINK_2" , "//////./../../etc" }, |
47 | {"SYMLINK_3" , "SYMLINK_1" }, |
48 | {"SYMLINK_4" , "SYMLINK_2" }, |
49 | {"SYMLINK_5" , "doesNotExist" }, |
50 | }; |
51 | |
52 | struct { |
53 | const char * in, * out, * resolved; |
54 | int error; |
55 | } tests[] = { |
56 | /* 0 */ |
57 | {"/" , "/" }, |
58 | {"/////////////////////////////////" , "/" }, |
59 | {"/.././.././.././..///" , "/" }, |
60 | {"/etc" , "/etc" }, |
61 | {"/etc/../etc" , "/etc" }, |
62 | /* 5 */ |
63 | {"/doesNotExist/../etc" , 0, "/doesNotExist" , ENOENT}, |
64 | {"./././././././././." , "." }, |
65 | {"/etc/.//doesNotExist" , 0, "/etc/doesNotExist" , ENOENT}, |
66 | {"./doesExist" , "./doesExist" }, |
67 | {"./doesExist/" , "./doesExist" }, |
68 | /* 10 */ |
69 | {"./doesExist/../doesExist" , "./doesExist" }, |
70 | {"foobar" , 0, "./foobar" , ENOENT}, |
71 | {"." , "." }, |
72 | {"./foobar" , 0, "./foobar" , ENOENT}, |
73 | {"SYMLINK_LOOP" , 0, "./SYMLINK_LOOP" , ELOOP}, |
74 | /* 15 */ |
75 | {"./SYMLINK_LOOP" , 0, "./SYMLINK_LOOP" , ELOOP}, |
76 | {"SYMLINK_1" , "." }, |
77 | {"SYMLINK_1/foobar" , 0, "./foobar" , ENOENT}, |
78 | {"SYMLINK_2" , "/etc" }, |
79 | {"SYMLINK_3" , "." }, |
80 | /* 20 */ |
81 | {"SYMLINK_4" , "/etc" }, |
82 | {"../stdlib/SYMLINK_1" , "." }, |
83 | {"../stdlib/SYMLINK_2" , "/etc" }, |
84 | {"../stdlib/SYMLINK_3" , "." }, |
85 | {"../stdlib/SYMLINK_4" , "/etc" }, |
86 | /* 25 */ |
87 | {"./SYMLINK_5" , 0, "./doesNotExist" , ENOENT}, |
88 | {"SYMLINK_5" , 0, "./doesNotExist" , ENOENT}, |
89 | {"SYMLINK_5/foobar" , 0, "./doesNotExist" , ENOENT}, |
90 | {"doesExist/../../stdlib/doesExist" , "./doesExist" }, |
91 | {"doesExist/.././../stdlib/." , "." }, |
92 | /* 30 */ |
93 | {"./doesExist/someFile/" , 0, "./doesExist/someFile" , ENOTDIR}, |
94 | {"./doesExist/someFile/.." , 0, "./doesExist/someFile" , ENOTDIR}, |
95 | }; |
96 | |
97 | |
98 | static int |
99 | check_path (const char * result, const char * expected) |
100 | { |
101 | int good; |
102 | |
103 | if (!result) |
104 | return (expected == NULL); |
105 | |
106 | if (!expected) |
107 | return 0; |
108 | |
109 | if (expected[0] == '.' && (expected[1] == '/' || expected[1] == '\0')) |
110 | good = (strncmp (result, cwd, cwd_len) == 0 |
111 | && strcmp (result + cwd_len, expected + 1) == 0); |
112 | else |
113 | good = (strcmp (expected, result) == 0); |
114 | |
115 | return good; |
116 | } |
117 | |
118 | |
119 | int |
120 | do_test (int argc, char ** argv) |
121 | { |
122 | char * result; |
123 | int i, errors = 0; |
124 | char buf[PATH_MAX]; |
125 | |
126 | getcwd (buf: cwd, size: sizeof (buf)); |
127 | cwd_len = strlen (cwd); |
128 | |
129 | errno = 0; |
130 | if (realpath (NULL, resolved: buf) != NULL || errno != EINVAL) |
131 | { |
132 | printf (format: "%s: expected return value NULL and errno set to EINVAL" |
133 | " for realpath(NULL,...)\n" , argv[0]); |
134 | ++errors; |
135 | } |
136 | |
137 | #if 0 |
138 | /* This is now allowed. The test is invalid. */ |
139 | errno = 0; |
140 | if (realpath ("/" , NULL) != NULL || errno != EINVAL) |
141 | { |
142 | printf ("%s: expected return value NULL and errno set to EINVAL" |
143 | " for realpath(...,NULL)\n" , argv[0]); |
144 | ++errors; |
145 | } |
146 | #endif |
147 | |
148 | errno = 0; |
149 | if (realpath (name: "" , resolved: buf) != NULL || errno != ENOENT) |
150 | { |
151 | printf (format: "%s: expected return value NULL and set errno to ENOENT" |
152 | " for realpath(\"\",...)\n" , argv[0]); |
153 | ++errors; |
154 | } |
155 | |
156 | for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i) |
157 | symlink (from: symlinks[i].value, to: symlinks[i].name); |
158 | |
159 | int has_dir = mkdir (path: "doesExist" , mode: 0777) == 0; |
160 | |
161 | int fd = has_dir ? creat (file: "doesExist/someFile" , mode: 0777) : -1; |
162 | |
163 | for (i = 0; i < (int) (sizeof (tests) / sizeof (tests[0])); ++i) |
164 | { |
165 | buf[0] = '\0'; |
166 | result = realpath (name: tests[i].in, resolved: buf); |
167 | |
168 | if (!check_path (result, expected: tests[i].out)) |
169 | { |
170 | printf (format: "%s: flunked test %d (expected `%s', got `%s')\n" , |
171 | argv[0], i, tests[i].out ? tests[i].out : "NULL" , |
172 | result ? result : "NULL" ); |
173 | ++errors; |
174 | continue; |
175 | } |
176 | |
177 | if (!check_path (result: buf, expected: tests[i].out ? tests[i].out : tests[i].resolved)) |
178 | { |
179 | printf (format: "%s: flunked test %d (expected resolved `%s', got `%s')\n" , |
180 | argv[0], i, tests[i].out ? tests[i].out : tests[i].resolved, |
181 | buf); |
182 | ++errors; |
183 | continue; |
184 | } |
185 | |
186 | if (!tests[i].out && errno != tests[i].error) |
187 | { |
188 | printf (format: "%s: flunked test %d (expected errno %d, got %d)\n" , |
189 | argv[0], i, tests[i].error, errno); |
190 | ++errors; |
191 | continue; |
192 | } |
193 | |
194 | char *result2 = realpath (name: tests[i].in, NULL); |
195 | if ((result2 == NULL && result != NULL) |
196 | || (result2 != NULL && strcmp (result, result2) != 0)) |
197 | { |
198 | printf (format: "\ |
199 | %s: realpath(..., NULL) produced different result than realpath(..., buf): '%s' vs '%s'\n" , |
200 | argv[0], result2, result); |
201 | ++errors; |
202 | } |
203 | free (ptr: result2); |
204 | } |
205 | |
206 | getcwd (buf: buf, size: sizeof (buf)); |
207 | if (strcmp (buf, cwd)) |
208 | { |
209 | printf (format: "%s: current working directory changed from %s to %s\n" , |
210 | argv[0], cwd, buf); |
211 | ++errors; |
212 | } |
213 | |
214 | if (fd >= 0) |
215 | { |
216 | close (fd: fd); |
217 | unlink (name: "doesExist/someFile" ); |
218 | } |
219 | |
220 | if (has_dir) |
221 | rmdir (path: "doesExist" ); |
222 | |
223 | for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i) |
224 | unlink (name: symlinks[i].name); |
225 | |
226 | if (errors != 0) |
227 | { |
228 | printf (format: "%d errors.\n" , errors); |
229 | return EXIT_FAILURE; |
230 | } |
231 | |
232 | puts (s: "No errors." ); |
233 | return EXIT_SUCCESS; |
234 | } |
235 | |