1 | /* Test glob memory management. |
2 | for the filesystem access functions. |
3 | Copyright (C) 2001-2022 Free Software Foundation, Inc. |
4 | This file is part of the GNU C Library. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <https://www.gnu.org/licenses/>. */ |
19 | |
20 | #include <errno.h> |
21 | #include <error.h> |
22 | #include <dirent.h> |
23 | #include <glob.h> |
24 | #include <mcheck.h> |
25 | #include <stdlib.h> |
26 | #include <stdio.h> |
27 | #include <string.h> |
28 | #include <sys/stat.h> |
29 | |
30 | // #define DEBUG |
31 | #ifdef DEBUG |
32 | # define PRINTF(fmt, args...) \ |
33 | do \ |
34 | { \ |
35 | int save_errno = errno; \ |
36 | printf (fmt, ##args); \ |
37 | errno = save_errno; \ |
38 | } while (0) |
39 | #else |
40 | # define PRINTF(fmt, args...) |
41 | #endif |
42 | |
43 | #define LONG_NAME \ |
44 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
45 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
46 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
47 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
48 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
49 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
50 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
51 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
52 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \ |
53 | "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" |
54 | |
55 | static struct |
56 | { |
57 | const char *name; |
58 | int level; |
59 | int type; |
60 | mode_t mode; |
61 | } filesystem[] = |
62 | { |
63 | { "." , 1, DT_DIR, 0755 }, |
64 | { ".." , 1, DT_DIR, 0755 }, |
65 | { "dir" , 1, DT_DIR, 0755 }, |
66 | { "." , 2, DT_DIR, 0755 }, |
67 | { ".." , 2, DT_DIR, 0755 }, |
68 | { "readable" , 2, DT_DIR, 0755 }, |
69 | { "." , 3, DT_DIR, 0755 }, |
70 | { ".." , 3, DT_DIR, 0755 }, |
71 | { "a" , 3, DT_REG, 0644 }, |
72 | { LONG_NAME, 3, DT_REG, 0644 }, |
73 | { "unreadable" , 2, DT_DIR, 0111 }, |
74 | { "." , 3, DT_DIR, 0111 }, |
75 | { ".." , 3, DT_DIR, 0755 }, |
76 | { "a" , 3, DT_REG, 0644 }, |
77 | { "zz-readable" , 2, DT_DIR, 0755 }, |
78 | { "." , 3, DT_DIR, 0755 }, |
79 | { ".." , 3, DT_DIR, 0755 }, |
80 | { "a" , 3, DT_REG, 0644 } |
81 | }; |
82 | #define nfiles (sizeof (filesystem) / sizeof (filesystem[0])) |
83 | |
84 | |
85 | typedef struct |
86 | { |
87 | int level; |
88 | int idx; |
89 | struct dirent d; |
90 | char room_for_dirent[sizeof (LONG_NAME)]; |
91 | } my_DIR; |
92 | |
93 | |
94 | static long int |
95 | find_file (const char *s) |
96 | { |
97 | int level = 1; |
98 | long int idx = 0; |
99 | |
100 | if (strcmp (s, "." ) == 0) |
101 | return 0; |
102 | |
103 | if (s[0] == '.' && s[1] == '/') |
104 | s += 2; |
105 | |
106 | while (*s != '\0') |
107 | { |
108 | char *endp = strchrnul (s: s, c: '/'); |
109 | |
110 | PRINTF ("looking for %.*s, level %d\n" , (int) (endp - s), s, level); |
111 | |
112 | while (idx < nfiles && filesystem[idx].level >= level) |
113 | { |
114 | if (filesystem[idx].level == level |
115 | && memcmp (s, filesystem[idx].name, endp - s) == 0 |
116 | && filesystem[idx].name[endp - s] == '\0') |
117 | break; |
118 | ++idx; |
119 | } |
120 | |
121 | if (idx == nfiles || filesystem[idx].level < level) |
122 | { |
123 | errno = ENOENT; |
124 | return -1; |
125 | } |
126 | |
127 | if (*endp == '\0') |
128 | return idx + 1; |
129 | |
130 | if (filesystem[idx].type != DT_DIR |
131 | && (idx + 1 >= nfiles |
132 | || filesystem[idx].level >= filesystem[idx + 1].level)) |
133 | { |
134 | errno = ENOTDIR; |
135 | return -1; |
136 | } |
137 | |
138 | ++idx; |
139 | |
140 | s = endp + 1; |
141 | ++level; |
142 | } |
143 | |
144 | errno = ENOENT; |
145 | return -1; |
146 | } |
147 | |
148 | |
149 | static void * |
150 | my_opendir (const char *s) |
151 | { |
152 | long int idx = find_file (s); |
153 | my_DIR *dir; |
154 | |
155 | if (idx == -1) |
156 | { |
157 | PRINTF ("my_opendir(\"%s\") == NULL (%m)\n" , s); |
158 | return NULL; |
159 | } |
160 | |
161 | if ((filesystem[idx].mode & 0400) == 0) |
162 | { |
163 | errno = EACCES; |
164 | PRINTF ("my_opendir(\"%s\") == NULL (%m)\n" , s); |
165 | return NULL; |
166 | } |
167 | |
168 | dir = (my_DIR *) malloc (size: sizeof (my_DIR)); |
169 | if (dir == NULL) |
170 | { |
171 | printf (format: "cannot allocate directory handle: %m\n" ); |
172 | exit (EXIT_FAILURE); |
173 | } |
174 | |
175 | dir->level = filesystem[idx].level; |
176 | dir->idx = idx; |
177 | |
178 | PRINTF ("my_opendir(\"%s\") == { level: %d, idx: %ld }\n" , |
179 | s, filesystem[idx].level, idx); |
180 | |
181 | return dir; |
182 | } |
183 | |
184 | |
185 | static struct dirent * |
186 | my_readdir (void *gdir) |
187 | { |
188 | my_DIR *dir = gdir; |
189 | |
190 | if (dir->idx == -1) |
191 | { |
192 | PRINTF ("my_readdir ({ level: %d, idx: %ld }) = NULL\n" , |
193 | dir->level, (long int) dir->idx); |
194 | return NULL; |
195 | } |
196 | |
197 | while (dir->idx < nfiles && filesystem[dir->idx].level > dir->level) |
198 | ++dir->idx; |
199 | |
200 | if (dir->idx == nfiles || filesystem[dir->idx].level < dir->level) |
201 | { |
202 | dir->idx = -1; |
203 | PRINTF ("my_readdir ({ level: %d, idx: %ld }) = NULL\n" , |
204 | dir->level, (long int) dir->idx); |
205 | return NULL; |
206 | } |
207 | |
208 | dir->d.d_ino = 1; /* glob should not skip this entry. */ |
209 | |
210 | dir->d.d_type = filesystem[dir->idx].type; |
211 | |
212 | strcpy (dir->d.d_name, filesystem[dir->idx].name); |
213 | |
214 | PRINTF ("my_readdir ({ level: %d, idx: %ld }) = { d_ino: %ld, d_type: %d, d_name: \"%s\" }\n" , |
215 | dir->level, (long int) dir->idx, dir->d.d_ino, dir->d.d_type, |
216 | dir->d.d_name); |
217 | |
218 | ++dir->idx; |
219 | |
220 | return &dir->d; |
221 | } |
222 | |
223 | |
224 | static void |
225 | my_closedir (void *dir) |
226 | { |
227 | PRINTF ("my_closedir ()\n" ); |
228 | free (ptr: dir); |
229 | } |
230 | |
231 | |
232 | /* We use this function for lstat as well since we don't have any. */ |
233 | static int |
234 | my_stat (const char *name, struct stat *st) |
235 | { |
236 | long int idx = find_file (s: name); |
237 | |
238 | if (idx == -1) |
239 | { |
240 | PRINTF ("my_stat (\"%s\", ...) = -1 (%m)\n" , name); |
241 | return -1; |
242 | } |
243 | |
244 | memset (st, '\0', sizeof (*st)); |
245 | |
246 | if (filesystem[idx].type == DT_UNKNOWN) |
247 | st->st_mode = DTTOIF (idx + 1 < nfiles |
248 | && filesystem[idx].level < filesystem[idx + 1].level |
249 | ? DT_DIR : DT_REG) | filesystem[idx].mode; |
250 | else |
251 | st->st_mode = DTTOIF (filesystem[idx].type) | filesystem[idx].mode; |
252 | |
253 | PRINTF ("my_stat (\"%s\", { st_mode: %o }) = 0\n" , name, st->st_mode); |
254 | |
255 | return 0; |
256 | } |
257 | |
258 | |
259 | static void |
260 | init_glob_altdirfuncs (glob_t *pglob) |
261 | { |
262 | pglob->gl_closedir = my_closedir; |
263 | pglob->gl_readdir = my_readdir; |
264 | pglob->gl_opendir = my_opendir; |
265 | pglob->gl_lstat = my_stat; |
266 | pglob->gl_stat = my_stat; |
267 | } |
268 | |
269 | |
270 | int |
271 | do_test (void) |
272 | { |
273 | mtrace (); |
274 | |
275 | glob_t gl; |
276 | memset (&gl, 0, sizeof (gl)); |
277 | init_glob_altdirfuncs (pglob: &gl); |
278 | |
279 | if (glob ("dir/*able/*" , GLOB_ERR | GLOB_ALTDIRFUNC, NULL, &gl) |
280 | != GLOB_ABORTED) |
281 | { |
282 | puts (s: "glob did not fail with GLOB_ABORTED" ); |
283 | exit (EXIT_FAILURE); |
284 | } |
285 | |
286 | globfree (&gl); |
287 | |
288 | memset (&gl, 0, sizeof (gl)); |
289 | init_glob_altdirfuncs (pglob: &gl); |
290 | |
291 | gl.gl_offs = 3; |
292 | if (glob ("dir2/*" , GLOB_DOOFFS, NULL, &gl) != GLOB_NOMATCH) |
293 | { |
294 | puts (s: "glob did not fail with GLOB_NOMATCH" ); |
295 | exit (EXIT_FAILURE); |
296 | } |
297 | |
298 | globfree (&gl); |
299 | |
300 | muntrace (); |
301 | |
302 | return 0; |
303 | } |
304 | |
305 | #define TEST_FUNCTION do_test () |
306 | #include "../test-skeleton.c" |
307 | |