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dff8da6b | 1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
54d79e99 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
54d79e99 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
54d79e99 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 RM |
17 | |
18 | /* | |
19 | * POSIX Standard: 5.1.2 Directory Operations <dirent.h> | |
20 | */ | |
21 | ||
22 | #ifndef _DIRENT_H | |
28f540f4 | 23 | #define _DIRENT_H 1 |
5107cf1d | 24 | |
28f540f4 RM |
25 | #include <features.h> |
26 | ||
27 | __BEGIN_DECLS | |
28 | ||
5107cf1d | 29 | #include <bits/types.h> |
28f540f4 | 30 | |
70b2845f UD |
31 | #ifdef __USE_XOPEN |
32 | # ifndef __ino_t_defined | |
33 | # ifndef __USE_FILE_OFFSET64 | |
34 | typedef __ino_t ino_t; | |
35 | # else | |
36 | typedef __ino64_t ino_t; | |
37 | # endif | |
38 | # define __ino_t_defined | |
39 | # endif | |
8353b5f6 | 40 | # if defined __USE_LARGEFILE64 && !defined __ino64_t_defined |
70b2845f | 41 | typedef __ino64_t ino64_t; |
8353b5f6 | 42 | # define __ino64_t_defined |
70b2845f UD |
43 | # endif |
44 | #endif | |
45 | ||
92777700 | 46 | /* This file defines `struct dirent'. |
bfc04a9f | 47 | |
92777700 RM |
48 | It defines the macro `_DIRENT_HAVE_D_NAMLEN' iff there is a `d_namlen' |
49 | member that gives the length of `d_name'. | |
bfc04a9f | 50 | |
92777700 | 51 | It defines the macro `_DIRENT_HAVE_D_RECLEN' iff there is a `d_reclen' |
a1470b6f RM |
52 | member that gives the size of the entire directory entry. |
53 | ||
54 | It defines the macro `_DIRENT_HAVE_D_OFF' iff there is a `d_off' | |
55 | member that gives the file offset of the next directory entry. | |
c0e45674 UD |
56 | |
57 | It defines the macro `_DIRENT_HAVE_D_TYPE' iff there is a `d_type' | |
58 | member that gives the type of the file. | |
a1470b6f | 59 | */ |
bfc04a9f | 60 | |
5107cf1d | 61 | #include <bits/dirent.h> |
28f540f4 | 62 | |
ed9a38e2 | 63 | #if defined __USE_MISC && !defined d_fileno |
c0e45674 | 64 | # define d_ino d_fileno /* Backward compatibility. */ |
28f540f4 RM |
65 | #endif |
66 | ||
92777700 RM |
67 | /* These macros extract size information from a `struct dirent *'. |
68 | They may evaluate their argument multiple times, so it must not | |
69 | have side effects. Each of these may involve a relatively costly | |
70 | call to `strlen' on some systems, so these values should be cached. | |
71 | ||
72 | _D_EXACT_NAMLEN (DP) returns the length of DP->d_name, not including | |
73 | its terminating null character. | |
74 | ||
75 | _D_ALLOC_NAMLEN (DP) returns a size at least (_D_EXACT_NAMLEN (DP) + 1); | |
76 | that is, the allocation size needed to hold the DP->d_name string. | |
77 | Use this macro when you don't need the exact length, just an upper bound. | |
78 | This macro is less likely to require calling `strlen' than _D_EXACT_NAMLEN. | |
79 | */ | |
80 | ||
81 | #ifdef _DIRENT_HAVE_D_NAMLEN | |
c0e45674 UD |
82 | # define _D_EXACT_NAMLEN(d) ((d)->d_namlen) |
83 | # define _D_ALLOC_NAMLEN(d) (_D_EXACT_NAMLEN (d) + 1) | |
92777700 | 84 | #else |
c0e45674 UD |
85 | # define _D_EXACT_NAMLEN(d) (strlen ((d)->d_name)) |
86 | # ifdef _DIRENT_HAVE_D_RECLEN | |
87 | # define _D_ALLOC_NAMLEN(d) (((char *) (d) + (d)->d_reclen) - &(d)->d_name[0]) | |
88 | # else | |
a04549c1 JM |
89 | # define _D_ALLOC_NAMLEN(d) (sizeof (d)->d_name > 1 ? sizeof (d)->d_name \ |
90 | : _D_EXACT_NAMLEN (d) + 1) | |
c0e45674 | 91 | # endif |
92777700 RM |
92 | #endif |
93 | ||
94 | ||
498afc54 | 95 | #ifdef __USE_MISC |
28f540f4 RM |
96 | /* File types for `d_type'. */ |
97 | enum | |
98 | { | |
99 | DT_UNKNOWN = 0, | |
74015205 | 100 | # define DT_UNKNOWN DT_UNKNOWN |
28f540f4 | 101 | DT_FIFO = 1, |
74015205 | 102 | # define DT_FIFO DT_FIFO |
28f540f4 | 103 | DT_CHR = 2, |
74015205 | 104 | # define DT_CHR DT_CHR |
28f540f4 | 105 | DT_DIR = 4, |
74015205 | 106 | # define DT_DIR DT_DIR |
28f540f4 | 107 | DT_BLK = 6, |
74015205 | 108 | # define DT_BLK DT_BLK |
28f540f4 | 109 | DT_REG = 8, |
74015205 | 110 | # define DT_REG DT_REG |
28f540f4 | 111 | DT_LNK = 10, |
74015205 | 112 | # define DT_LNK DT_LNK |
21f6a100 | 113 | DT_SOCK = 12, |
74015205 | 114 | # define DT_SOCK DT_SOCK |
21f6a100 UD |
115 | DT_WHT = 14 |
116 | # define DT_WHT DT_WHT | |
28f540f4 RM |
117 | }; |
118 | ||
119 | /* Convert between stat structure types and directory types. */ | |
c0e45674 UD |
120 | # define IFTODT(mode) (((mode) & 0170000) >> 12) |
121 | # define DTTOIF(dirtype) ((dirtype) << 12) | |
28f540f4 RM |
122 | #endif |
123 | ||
124 | ||
18926cf4 RM |
125 | /* This is the data type of directory stream objects. |
126 | The actual structure is opaque to users. */ | |
127 | typedef struct __dirstream DIR; | |
28f540f4 | 128 | |
0e12ca02 SG |
129 | /* Close the directory stream DIRP. |
130 | Return 0 if successful, -1 if not. | |
131 | ||
132 | This function is a possible cancellation point and therefore not | |
133 | marked with __THROW. */ | |
134 | extern int closedir (DIR *__dirp) __nonnull ((1)); | |
135 | ||
28f540f4 | 136 | /* Open a directory stream on NAME. |
2c008571 UD |
137 | Return a DIR stream on the directory, or NULL if it could not be opened. |
138 | ||
139 | This function is a possible cancellation point and therefore not | |
140 | marked with __THROW. */ | |
0e12ca02 SG |
141 | extern DIR *opendir (const char *__name) __nonnull ((1)) |
142 | __attribute_malloc__ __attr_dealloc (closedir, 1); | |
28f540f4 | 143 | |
77db439e | 144 | #ifdef __USE_XOPEN2K8 |
1812d50b UD |
145 | /* Same as opendir, but open the stream on the file descriptor FD. |
146 | ||
147 | This function is a possible cancellation point and therefore not | |
148 | marked with __THROW. */ | |
0e12ca02 SG |
149 | extern DIR *fdopendir (int __fd) |
150 | __attribute_malloc__ __attr_dealloc (closedir, 1); | |
1812d50b UD |
151 | #endif |
152 | ||
dfd2257a UD |
153 | /* Read a directory entry from DIRP. Return a pointer to a `struct |
154 | dirent' describing the entry, or NULL for EOF or error. The | |
155 | storage returned may be overwritten by a later readdir call on the | |
156 | same DIR stream. | |
157 | ||
158 | If the Large File Support API is selected we have to use the | |
2c008571 UD |
159 | appropriate interface. |
160 | ||
161 | This function is a possible cancellation point and therefore not | |
162 | marked with __THROW. */ | |
dfd2257a | 163 | #ifndef __USE_FILE_OFFSET64 |
b45ff182 | 164 | extern struct dirent *readdir (DIR *__dirp) __nonnull ((1)); |
dfd2257a | 165 | #else |
01cad722 | 166 | # ifdef __REDIRECT |
b45ff182 UD |
167 | extern struct dirent *__REDIRECT (readdir, (DIR *__dirp), readdir64) |
168 | __nonnull ((1)); | |
01cad722 UD |
169 | # else |
170 | # define readdir readdir64 | |
171 | # endif | |
dfd2257a UD |
172 | #endif |
173 | ||
174 | #ifdef __USE_LARGEFILE64 | |
b45ff182 | 175 | extern struct dirent64 *readdir64 (DIR *__dirp) __nonnull ((1)); |
dfd2257a | 176 | #endif |
28f540f4 | 177 | |
acd7f096 | 178 | #ifdef __USE_POSIX |
6d52618b | 179 | /* Reentrant version of `readdir'. Return in RESULT a pointer to the |
2c008571 UD |
180 | next entry. |
181 | ||
182 | This function is a possible cancellation point and therefore not | |
183 | marked with __THROW. */ | |
dfd2257a | 184 | # ifndef __USE_FILE_OFFSET64 |
c1422e5b UD |
185 | extern int readdir_r (DIR *__restrict __dirp, |
186 | struct dirent *__restrict __entry, | |
b45ff182 | 187 | struct dirent **__restrict __result) |
7584a3f9 | 188 | __nonnull ((1, 2, 3)) __attribute_deprecated__; |
dfd2257a | 189 | # else |
01cad722 | 190 | # ifdef __REDIRECT |
c1422e5b UD |
191 | extern int __REDIRECT (readdir_r, |
192 | (DIR *__restrict __dirp, | |
193 | struct dirent *__restrict __entry, | |
2c008571 | 194 | struct dirent **__restrict __result), |
7584a3f9 FW |
195 | readdir64_r) |
196 | __nonnull ((1, 2, 3)) __attribute_deprecated__; | |
01cad722 UD |
197 | # else |
198 | # define readdir_r readdir64_r | |
199 | # endif | |
dfd2257a UD |
200 | # endif |
201 | ||
202 | # ifdef __USE_LARGEFILE64 | |
c1422e5b UD |
203 | extern int readdir64_r (DIR *__restrict __dirp, |
204 | struct dirent64 *__restrict __entry, | |
b45ff182 | 205 | struct dirent64 **__restrict __result) |
7584a3f9 | 206 | __nonnull ((1, 2, 3)) __attribute_deprecated__; |
dfd2257a | 207 | # endif |
c0e45674 | 208 | #endif /* POSIX or misc */ |
d68171ed | 209 | |
28f540f4 | 210 | /* Rewind DIRP to the beginning of the directory. */ |
b45ff182 | 211 | extern void rewinddir (DIR *__dirp) __THROW __nonnull ((1)); |
28f540f4 | 212 | |
ed9a38e2 | 213 | #if defined __USE_MISC || defined __USE_XOPEN |
40a55d20 UD |
214 | # include <bits/types.h> |
215 | ||
216 | /* Seek to position POS on DIRP. */ | |
b45ff182 | 217 | extern void seekdir (DIR *__dirp, long int __pos) __THROW __nonnull ((1)); |
40a55d20 UD |
218 | |
219 | /* Return the current position of DIRP. */ | |
b45ff182 | 220 | extern long int telldir (DIR *__dirp) __THROW __nonnull ((1)); |
40a55d20 UD |
221 | #endif |
222 | ||
acd7f096 | 223 | #ifdef __USE_XOPEN2K8 |
28f540f4 | 224 | |
22a1292a | 225 | /* Return the file descriptor used by DIRP. */ |
b45ff182 | 226 | extern int dirfd (DIR *__dirp) __THROW __nonnull ((1)); |
22a1292a | 227 | |
c0e45674 UD |
228 | # if defined __OPTIMIZE__ && defined _DIR_dirfd |
229 | # define dirfd(dirp) _DIR_dirfd (dirp) | |
230 | # endif | |
22a1292a | 231 | |
ed9a38e2 | 232 | # ifdef __USE_MISC |
77db439e | 233 | # ifndef MAXNAMLEN |
28f540f4 | 234 | /* Get the definitions of the POSIX.1 limits. */ |
5107cf1d | 235 | # include <bits/posix1_lim.h> |
28f540f4 RM |
236 | |
237 | /* `MAXNAMLEN' is the BSD name for what POSIX calls `NAME_MAX'. */ | |
77db439e UD |
238 | # ifdef NAME_MAX |
239 | # define MAXNAMLEN NAME_MAX | |
240 | # else | |
241 | # define MAXNAMLEN 255 | |
242 | # endif | |
c0e45674 UD |
243 | # endif |
244 | # endif | |
245 | ||
c0e45674 UD |
246 | # define __need_size_t |
247 | # include <stddef.h> | |
28f540f4 | 248 | |
afd4eb37 | 249 | /* Scan the directory DIR, calling SELECTOR on each directory entry. |
28f540f4 RM |
250 | Entries for which SELECT returns nonzero are individually malloc'd, |
251 | sorted using qsort with CMP, and collected in a malloc'd array in | |
c55fbd1e UD |
252 | *NAMELIST. Returns the number of entries selected, or -1 on error. |
253 | ||
254 | This function is a cancellation point and therefore not marked with | |
255 | __THROW. */ | |
89a9e37b | 256 | # ifndef __USE_FILE_OFFSET64 |
a784e502 | 257 | extern int scandir (const char *__restrict __dir, |
c1422e5b | 258 | struct dirent ***__restrict __namelist, |
a784e502 UD |
259 | int (*__selector) (const struct dirent *), |
260 | int (*__cmp) (const struct dirent **, | |
261 | const struct dirent **)) | |
b45ff182 | 262 | __nonnull ((1, 2)); |
89a9e37b | 263 | # else |
01cad722 UD |
264 | # ifdef __REDIRECT |
265 | extern int __REDIRECT (scandir, | |
a784e502 | 266 | (const char *__restrict __dir, |
c1422e5b | 267 | struct dirent ***__restrict __namelist, |
a784e502 UD |
268 | int (*__selector) (const struct dirent *), |
269 | int (*__cmp) (const struct dirent **, | |
270 | const struct dirent **)), | |
b45ff182 | 271 | scandir64) __nonnull ((1, 2)); |
01cad722 UD |
272 | # else |
273 | # define scandir scandir64 | |
274 | # endif | |
89a9e37b UD |
275 | # endif |
276 | ||
277 | # if defined __USE_GNU && defined __USE_LARGEFILE64 | |
278 | /* This function is like `scandir' but it uses the 64bit dirent structure. | |
279 | Please note that the CMP function must now work with struct dirent64 **. */ | |
a784e502 | 280 | extern int scandir64 (const char *__restrict __dir, |
c1422e5b | 281 | struct dirent64 ***__restrict __namelist, |
a784e502 UD |
282 | int (*__selector) (const struct dirent64 *), |
283 | int (*__cmp) (const struct dirent64 **, | |
284 | const struct dirent64 **)) | |
b45ff182 | 285 | __nonnull ((1, 2)); |
89a9e37b | 286 | # endif |
28f540f4 | 287 | |
c55fbd1e UD |
288 | # ifdef __USE_GNU |
289 | /* Similar to `scandir' but a relative DIR name is interpreted relative | |
290 | to the directory for which DFD is a descriptor. | |
291 | ||
292 | This function is a cancellation point and therefore not marked with | |
293 | __THROW. */ | |
294 | # ifndef __USE_FILE_OFFSET64 | |
a784e502 | 295 | extern int scandirat (int __dfd, const char *__restrict __dir, |
c55fbd1e | 296 | struct dirent ***__restrict __namelist, |
a784e502 UD |
297 | int (*__selector) (const struct dirent *), |
298 | int (*__cmp) (const struct dirent **, | |
299 | const struct dirent **)) | |
c55fbd1e UD |
300 | __nonnull ((2, 3)); |
301 | # else | |
302 | # ifdef __REDIRECT | |
303 | extern int __REDIRECT (scandirat, | |
a784e502 | 304 | (int __dfd, const char *__restrict __dir, |
c55fbd1e | 305 | struct dirent ***__restrict __namelist, |
a784e502 UD |
306 | int (*__selector) (const struct dirent *), |
307 | int (*__cmp) (const struct dirent **, | |
308 | const struct dirent **)), | |
c55fbd1e UD |
309 | scandirat64) __nonnull ((2, 3)); |
310 | # else | |
311 | # define scandirat scandirat64 | |
312 | # endif | |
313 | # endif | |
314 | ||
315 | /* This function is like `scandir' but it uses the 64bit dirent structure. | |
316 | Please note that the CMP function must now work with struct dirent64 **. */ | |
a784e502 | 317 | extern int scandirat64 (int __dfd, const char *__restrict __dir, |
c55fbd1e | 318 | struct dirent64 ***__restrict __namelist, |
a784e502 UD |
319 | int (*__selector) (const struct dirent64 *), |
320 | int (*__cmp) (const struct dirent64 **, | |
321 | const struct dirent64 **)) | |
c55fbd1e UD |
322 | __nonnull ((2, 3)); |
323 | # endif | |
324 | ||
28f540f4 | 325 | /* Function to compare two `struct dirent's alphabetically. */ |
89a9e37b | 326 | # ifndef __USE_FILE_OFFSET64 |
a784e502 UD |
327 | extern int alphasort (const struct dirent **__e1, |
328 | const struct dirent **__e2) | |
b45ff182 | 329 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
89a9e37b | 330 | # else |
01cad722 | 331 | # ifdef __REDIRECT |
f377d022 | 332 | extern int __REDIRECT_NTH (alphasort, |
a784e502 UD |
333 | (const struct dirent **__e1, |
334 | const struct dirent **__e2), | |
b45ff182 | 335 | alphasort64) __attribute_pure__ __nonnull ((1, 2)); |
01cad722 UD |
336 | # else |
337 | # define alphasort alphasort64 | |
338 | # endif | |
89a9e37b UD |
339 | # endif |
340 | ||
341 | # if defined __USE_GNU && defined __USE_LARGEFILE64 | |
a784e502 UD |
342 | extern int alphasort64 (const struct dirent64 **__e1, |
343 | const struct dirent64 **__e2) | |
b45ff182 | 344 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
89a9e37b | 345 | # endif |
acd7f096 | 346 | #endif /* Use XPG7. */ |
28f540f4 RM |
347 | |
348 | ||
ed9a38e2 | 349 | #ifdef __USE_MISC |
28f540f4 RM |
350 | /* Read directory entries from FD into BUF, reading at most NBYTES. |
351 | Reading starts at offset *BASEP, and *BASEP is updated with the new | |
352 | position after reading. Returns the number of bytes read; zero when at | |
353 | end of directory; or -1 for errors. */ | |
eee6b143 | 354 | # ifndef __USE_FILE_OFFSET64 |
c1422e5b UD |
355 | extern __ssize_t getdirentries (int __fd, char *__restrict __buf, |
356 | size_t __nbytes, | |
b45ff182 UD |
357 | __off_t *__restrict __basep) |
358 | __THROW __nonnull ((2, 4)); | |
eee6b143 UD |
359 | # else |
360 | # ifdef __REDIRECT | |
f377d022 UD |
361 | extern __ssize_t __REDIRECT_NTH (getdirentries, |
362 | (int __fd, char *__restrict __buf, | |
363 | size_t __nbytes, | |
364 | __off64_t *__restrict __basep), | |
b45ff182 | 365 | getdirentries64) __nonnull ((2, 4)); |
eee6b143 UD |
366 | # else |
367 | # define getdirentries getdirentries64 | |
e5cd813b | 368 | # endif |
eee6b143 | 369 | # endif |
28f540f4 | 370 | |
eee6b143 | 371 | # ifdef __USE_LARGEFILE64 |
c1422e5b UD |
372 | extern __ssize_t getdirentries64 (int __fd, char *__restrict __buf, |
373 | size_t __nbytes, | |
b45ff182 UD |
374 | __off64_t *__restrict __basep) |
375 | __THROW __nonnull ((2, 4)); | |
eee6b143 | 376 | # endif |
acd7f096 | 377 | #endif /* Use misc. */ |
77db439e UD |
378 | |
379 | #ifdef __USE_GNU | |
380 | /* Function to compare two `struct dirent's by name & version. */ | |
381 | # ifndef __USE_FILE_OFFSET64 | |
a784e502 UD |
382 | extern int versionsort (const struct dirent **__e1, |
383 | const struct dirent **__e2) | |
77db439e UD |
384 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
385 | # else | |
386 | # ifdef __REDIRECT | |
387 | extern int __REDIRECT_NTH (versionsort, | |
a784e502 UD |
388 | (const struct dirent **__e1, |
389 | const struct dirent **__e2), | |
77db439e UD |
390 | versionsort64) |
391 | __attribute_pure__ __nonnull ((1, 2)); | |
392 | # else | |
393 | # define versionsort versionsort64 | |
394 | # endif | |
e5cd813b | 395 | # endif |
28f540f4 | 396 | |
77db439e | 397 | # ifdef __USE_LARGEFILE64 |
a784e502 UD |
398 | extern int versionsort64 (const struct dirent64 **__e1, |
399 | const struct dirent64 **__e2) | |
77db439e UD |
400 | __THROW __attribute_pure__ __nonnull ((1, 2)); |
401 | # endif | |
402 | #endif /* Use GNU. */ | |
28f540f4 RM |
403 | |
404 | __END_DECLS | |
405 | ||
b8b3d5a1 FW |
406 | #include <bits/dirent_ext.h> |
407 | ||
28f540f4 | 408 | #endif /* dirent.h */ |