1 /* A GNU-like <dirent.h>.
2 Copyright (C) 2006-2021 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 This program 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
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 #ifndef _@GUARD_PREFIX@_DIRENT_H
18
19 #if __GNUC__ >= 3
20 @PRAGMA_SYSTEM_HEADER@
21 #endif
22 @PRAGMA_COLUMNS@
23
24 /* The include_next requires a split double-inclusion guard. */
25 #if @HAVE_DIRENT_H@
26 # @INCLUDE_NEXT@ @NEXT_DIRENT_H@
27 #endif
28
29 #ifndef _@GUARD_PREFIX@_DIRENT_H
30 #define _@GUARD_PREFIX@_DIRENT_H
31
32 /* Get ino_t. Needed on some systems, including glibc 2.8. */
33 #include <sys/types.h>
34
35 #if !@HAVE_DIRENT_H@
36 /* Define types DIR and 'struct dirent'. */
37 # if !GNULIB_defined_struct_dirent
38 struct dirent
39 {
40 char d_type;
41 char d_name[1];
42 };
43 /* Possible values for 'd_type'. */
44 # define DT_UNKNOWN 0
45 # define DT_FIFO 1 /* FIFO */
46 # define DT_CHR 2 /* character device */
47 # define DT_DIR 4 /* directory */
48 # define DT_BLK 6 /* block device */
49 # define DT_REG 8 /* regular file */
50 # define DT_LNK 10 /* symbolic link */
51 # define DT_SOCK 12 /* socket */
52 # define DT_WHT 14 /* whiteout */
53 typedef struct gl_directory DIR;
54 # define GNULIB_defined_struct_dirent 1
55 # endif
56 #endif
57
58 /* The __attribute__ feature is available in gcc versions 2.5 and later.
59 The attribute __pure__ was added in gcc 2.96. */
60 #ifndef _GL_ATTRIBUTE_PURE
61 # if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) || defined __clang__
62 # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
63 # else
64 # define _GL_ATTRIBUTE_PURE /* empty */
65 # endif
66 #endif
67
68 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
69
70 /* The definition of _GL_ARG_NONNULL is copied here. */
71
72 /* The definition of _GL_WARN_ON_USE is copied here. */
73
74
75 /* Declare overridden functions. */
76
77 #if @GNULIB_OPENDIR@
78 # if @REPLACE_OPENDIR@
79 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
80 # undef opendir
81 # define opendir rpl_opendir
82 # define GNULIB_defined_opendir 1
83 # endif
84 _GL_FUNCDECL_RPL (opendir, DIR *, (const char *dir_name) _GL_ARG_NONNULL ((1)));
85 _GL_CXXALIAS_RPL (opendir, DIR *, (const char *dir_name));
86 # else
87 # if !@HAVE_OPENDIR@
88 _GL_FUNCDECL_SYS (opendir, DIR *, (const char *dir_name) _GL_ARG_NONNULL ((1)));
89 # endif
90 _GL_CXXALIAS_SYS (opendir, DIR *, (const char *dir_name));
91 # endif
92 _GL_CXXALIASWARN (opendir);
93 #elif defined GNULIB_POSIXCHECK
94 # undef opendir
95 # if HAVE_RAW_DECL_OPENDIR
96 _GL_WARN_ON_USE (opendir, "opendir is not portable - "
97 "use gnulib module opendir for portability");
98 # endif
99 #endif
100
101 #if @GNULIB_READDIR@
102 # if !@HAVE_READDIR@
103 _GL_FUNCDECL_SYS (readdir, struct dirent *, (DIR *dirp) _GL_ARG_NONNULL ((1)));
104 # endif
105 _GL_CXXALIAS_SYS (readdir, struct dirent *, (DIR *dirp));
106 _GL_CXXALIASWARN (readdir);
107 #elif defined GNULIB_POSIXCHECK
108 # undef readdir
109 # if HAVE_RAW_DECL_READDIR
110 _GL_WARN_ON_USE (readdir, "readdir is not portable - "
111 "use gnulib module readdir for portability");
112 # endif
113 #endif
114
115 #if @GNULIB_REWINDDIR@
116 # if !@HAVE_REWINDDIR@
117 _GL_FUNCDECL_SYS (rewinddir, void, (DIR *dirp) _GL_ARG_NONNULL ((1)));
118 # endif
119 _GL_CXXALIAS_SYS (rewinddir, void, (DIR *dirp));
120 _GL_CXXALIASWARN (rewinddir);
121 #elif defined GNULIB_POSIXCHECK
122 # undef rewinddir
123 # if HAVE_RAW_DECL_REWINDDIR
124 _GL_WARN_ON_USE (rewinddir, "rewinddir is not portable - "
125 "use gnulib module rewinddir for portability");
126 # endif
127 #endif
128
129 #if @GNULIB_CLOSEDIR@
130 # if @REPLACE_CLOSEDIR@
131 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
132 # undef closedir
133 # define closedir rpl_closedir
134 # define GNULIB_defined_closedir 1
135 # endif
136 _GL_FUNCDECL_RPL (closedir, int, (DIR *dirp) _GL_ARG_NONNULL ((1)));
137 _GL_CXXALIAS_RPL (closedir, int, (DIR *dirp));
138 # else
139 # if !@HAVE_CLOSEDIR@
140 _GL_FUNCDECL_SYS (closedir, int, (DIR *dirp) _GL_ARG_NONNULL ((1)));
141 # endif
142 _GL_CXXALIAS_SYS (closedir, int, (DIR *dirp));
143 # endif
144 _GL_CXXALIASWARN (closedir);
145 #elif defined GNULIB_POSIXCHECK
146 # undef closedir
147 # if HAVE_RAW_DECL_CLOSEDIR
148 _GL_WARN_ON_USE (closedir, "closedir is not portable - "
149 "use gnulib module closedir for portability");
150 # endif
151 #endif
152
153 #if @GNULIB_DIRFD@
154 /* Return the file descriptor associated with the given directory stream,
155 or -1 if none exists. */
156 # if @REPLACE_DIRFD@
157 /* On kLIBC, dirfd() is a macro that does not work. Undefine it. */
158 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) || defined dirfd
159 # undef dirfd
160 # define dirfd rpl_dirfd
161 # endif
162 _GL_FUNCDECL_RPL (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
163 _GL_CXXALIAS_RPL (dirfd, int, (DIR *));
164
165 # ifdef __KLIBC__
166 /* Gnulib internal hooks needed to maintain the dirfd metadata. */
167 _GL_EXTERN_C int _gl_register_dirp_fd (int fd, DIR *dirp)
168 _GL_ARG_NONNULL ((2));
169 _GL_EXTERN_C void _gl_unregister_dirp_fd (int fd);
170 # endif
171 # else
172 # if defined __cplusplus && defined GNULIB_NAMESPACE && defined dirfd
173 /* dirfd is defined as a macro and not as a function.
174 Turn it into a function and get rid of the macro. */
175 static inline int (dirfd) (DIR *dp) { return dirfd (dp); }
176 # undef dirfd
177 # endif
178 # if !(@HAVE_DECL_DIRFD@ || defined dirfd)
179 _GL_FUNCDECL_SYS (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
180 # endif
181 _GL_CXXALIAS_SYS (dirfd, int, (DIR *));
182 # endif
183 _GL_CXXALIASWARN (dirfd);
184 #elif defined GNULIB_POSIXCHECK
185 # undef dirfd
186 # if HAVE_RAW_DECL_DIRFD
187 _GL_WARN_ON_USE (dirfd, "dirfd is unportable - "
188 "use gnulib module dirfd for portability");
189 # endif
190 #endif
191
192 #if @GNULIB_FDOPENDIR@
193 /* Open a directory stream visiting the given directory file
194 descriptor. Return NULL and set errno if fd is not visiting a
195 directory. On success, this function consumes fd (it will be
196 implicitly closed either by this function or by a subsequent
197 closedir). */
198 # if @REPLACE_FDOPENDIR@
199 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
200 # undef fdopendir
201 # define fdopendir rpl_fdopendir
202 # endif
203 _GL_FUNCDECL_RPL (fdopendir, DIR *, (int fd));
204 _GL_CXXALIAS_RPL (fdopendir, DIR *, (int fd));
205 # else
206 # if !@HAVE_FDOPENDIR@ || !@HAVE_DECL_FDOPENDIR@
207 _GL_FUNCDECL_SYS (fdopendir, DIR *, (int fd));
208 # endif
209 _GL_CXXALIAS_SYS (fdopendir, DIR *, (int fd));
210 # endif
211 _GL_CXXALIASWARN (fdopendir);
212 #elif defined GNULIB_POSIXCHECK
213 # undef fdopendir
214 # if HAVE_RAW_DECL_FDOPENDIR
215 _GL_WARN_ON_USE (fdopendir, "fdopendir is unportable - "
216 "use gnulib module fdopendir for portability");
217 # endif
218 #endif
219
220 #if @GNULIB_SCANDIR@
221 /* Scan the directory DIR, calling FILTER on each directory entry.
222 Entries for which FILTER returns nonzero are individually malloc'd,
223 sorted using qsort with CMP, and collected in a malloc'd array in
224 *NAMELIST. Returns the number of entries selected, or -1 on error. */
225 # if !@HAVE_SCANDIR@
226 _GL_FUNCDECL_SYS (scandir, int,
227 (const char *dir, struct dirent ***namelist,
228 int (*filter) (const struct dirent *),
229 int (*cmp) (const struct dirent **, const struct dirent **))
230 _GL_ARG_NONNULL ((1, 2, 4)));
231 # endif
232 /* Need to cast, because on glibc systems, the fourth parameter is
233 int (*cmp) (const void *, const void *). */
234 _GL_CXXALIAS_SYS_CAST (scandir, int,
235 (const char *dir, struct dirent ***namelist,
236 int (*filter) (const struct dirent *),
237 int (*cmp) (const struct dirent **, const struct dirent **)));
238 _GL_CXXALIASWARN (scandir);
239 #elif defined GNULIB_POSIXCHECK
240 # undef scandir
241 # if HAVE_RAW_DECL_SCANDIR
242 _GL_WARN_ON_USE (scandir, "scandir is unportable - "
243 "use gnulib module scandir for portability");
244 # endif
245 #endif
246
247 #if @GNULIB_ALPHASORT@
248 /* Compare two 'struct dirent' entries alphabetically. */
249 # if !@HAVE_ALPHASORT@
250 _GL_FUNCDECL_SYS (alphasort, int,
251 (const struct dirent **, const struct dirent **)
252 _GL_ATTRIBUTE_PURE
253 _GL_ARG_NONNULL ((1, 2)));
254 # endif
255 /* Need to cast, because on glibc systems, the parameters are
256 (const void *, const void *). */
257 _GL_CXXALIAS_SYS_CAST (alphasort, int,
258 (const struct dirent **, const struct dirent **));
259 _GL_CXXALIASWARN (alphasort);
260 #elif defined GNULIB_POSIXCHECK
261 # undef alphasort
262 # if HAVE_RAW_DECL_ALPHASORT
263 _GL_WARN_ON_USE (alphasort, "alphasort is unportable - "
264 "use gnulib module alphasort for portability");
265 # endif
266 #endif
267
268
269 #endif /* _@GUARD_PREFIX@_DIRENT_H */
270 #endif /* _@GUARD_PREFIX@_DIRENT_H */