lib/dirent.in.h

   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 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 158 #   undef dirfd
 159 #   define dirfd rpl_dirfd
 160 #  endif
 161 _GL_FUNCDECL_RPL (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
 162 _GL_CXXALIAS_RPL (dirfd, int, (DIR *));
 163
 164 #  ifdef __KLIBC__
 165 /* Gnulib internal hooks needed to maintain the dirfd metadata.  */
 166 _GL_EXTERN_C int _gl_register_dirp_fd (int fd, DIR *dirp)
 167      _GL_ARG_NONNULL ((2));
 168 _GL_EXTERN_C void _gl_unregister_dirp_fd (int fd);
 169 #  endif
 170 # else
 171 #  if defined __cplusplus && defined GNULIB_NAMESPACE && defined dirfd
 172     /* dirfd is defined as a macro and not as a function.
 173        Turn it into a function and get rid of the macro.  */
 174 static inline int (dirfd) (DIR *dp) { return dirfd (dp); }
 175 #   undef dirfd
 176 #  endif
 177 #  if !(@HAVE_DECL_DIRFD@ || defined dirfd)
 178 _GL_FUNCDECL_SYS (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
 179 #  endif
 180 _GL_CXXALIAS_SYS (dirfd, int, (DIR *));
 181 # endif
 182 _GL_CXXALIASWARN (dirfd);
 183 #elif defined GNULIB_POSIXCHECK
 184 # undef dirfd
 185 # if HAVE_RAW_DECL_DIRFD
 186 _GL_WARN_ON_USE (dirfd, "dirfd is unportable - "
 187                  "use gnulib module dirfd for portability");
 188 # endif
 189 #endif
 190
 191 #if @GNULIB_FDOPENDIR@
 192 /* Open a directory stream visiting the given directory file
 193    descriptor.  Return NULL and set errno if fd is not visiting a
 194    directory.  On success, this function consumes fd (it will be
 195    implicitly closed either by this function or by a subsequent
 196    closedir).  */
 197 # if @REPLACE_FDOPENDIR@
 198 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 199 #   undef fdopendir
 200 #   define fdopendir rpl_fdopendir
 201 #  endif
 202 _GL_FUNCDECL_RPL (fdopendir, DIR *, (int fd));
 203 _GL_CXXALIAS_RPL (fdopendir, DIR *, (int fd));
 204 # else
 205 #  if !@HAVE_FDOPENDIR@ || !@HAVE_DECL_FDOPENDIR@
 206 _GL_FUNCDECL_SYS (fdopendir, DIR *, (int fd));
 207 #  endif
 208 _GL_CXXALIAS_SYS (fdopendir, DIR *, (int fd));
 209 # endif
 210 _GL_CXXALIASWARN (fdopendir);
 211 #elif defined GNULIB_POSIXCHECK
 212 # undef fdopendir
 213 # if HAVE_RAW_DECL_FDOPENDIR
 214 _GL_WARN_ON_USE (fdopendir, "fdopendir is unportable - "
 215                  "use gnulib module fdopendir for portability");
 216 # endif
 217 #endif
 218
 219 #if @GNULIB_SCANDIR@
 220 /* Scan the directory DIR, calling FILTER on each directory entry.
 221    Entries for which FILTER returns nonzero are individually malloc'd,
 222    sorted using qsort with CMP, and collected in a malloc'd array in
 223    *NAMELIST.  Returns the number of entries selected, or -1 on error.  */
 224 # if !@HAVE_SCANDIR@
 225 _GL_FUNCDECL_SYS (scandir, int,
 226                   (const char *dir, struct dirent ***namelist,
 227                    int (*filter) (const struct dirent *),
 228                    int (*cmp) (const struct dirent **, const struct dirent **))
 229                   _GL_ARG_NONNULL ((1, 2, 4)));
 230 # endif
 231 /* Need to cast, because on glibc systems, the fourth parameter is
 232                         int (*cmp) (const void *, const void *).  */
 233 _GL_CXXALIAS_SYS_CAST (scandir, int,
 234                        (const char *dir, struct dirent ***namelist,
 235                         int (*filter) (const struct dirent *),
 236                         int (*cmp) (const struct dirent **, const struct dirent **)));
 237 _GL_CXXALIASWARN (scandir);
 238 #elif defined GNULIB_POSIXCHECK
 239 # undef scandir
 240 # if HAVE_RAW_DECL_SCANDIR
 241 _GL_WARN_ON_USE (scandir, "scandir is unportable - "
 242                  "use gnulib module scandir for portability");
 243 # endif
 244 #endif
 245
 246 #if @GNULIB_ALPHASORT@
 247 /* Compare two 'struct dirent' entries alphabetically.  */
 248 # if !@HAVE_ALPHASORT@
 249 _GL_FUNCDECL_SYS (alphasort, int,
 250                   (const struct dirent **, const struct dirent **)
 251                   _GL_ATTRIBUTE_PURE
 252                   _GL_ARG_NONNULL ((1, 2)));
 253 # endif
 254 /* Need to cast, because on glibc systems, the parameters are
 255                        (const void *, const void *).  */
 256 _GL_CXXALIAS_SYS_CAST (alphasort, int,
 257                        (const struct dirent **, const struct dirent **));
 258 _GL_CXXALIASWARN (alphasort);
 259 #elif defined GNULIB_POSIXCHECK
 260 # undef alphasort
 261 # if HAVE_RAW_DECL_ALPHASORT
 262 _GL_WARN_ON_USE (alphasort, "alphasort is unportable - "
 263                  "use gnulib module alphasort for portability");
 264 # endif
 265 #endif
 266
 267
 268 #endif /* _@GUARD_PREFIX@_DIRENT_H */
 269 #endif /* _@GUARD_PREFIX@_DIRENT_H */