lib/dirent.in.h

   1 /* A GNU-like <dirent.h>.
   2    Copyright (C) 2006-2014 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 <http://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 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
  61 # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
  62 #else
  63 # define _GL_ATTRIBUTE_PURE /* empty */
  64 #endif
  65
  66 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  67
  68 /* The definition of _GL_ARG_NONNULL is copied here.  */
  69
  70 /* The definition of _GL_WARN_ON_USE is copied here.  */
  71
  72
  73 /* Declare overridden functions.  */
  74
  75 #if @GNULIB_OPENDIR@
  76 # if @REPLACE_OPENDIR@
  77 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
  78 #   undef opendir
  79 #   define opendir rpl_opendir
  80 #  endif
  81 _GL_FUNCDECL_RPL (opendir, DIR *, (const char *dir_name) _GL_ARG_NONNULL ((1)));
  82 _GL_CXXALIAS_RPL (opendir, DIR *, (const char *dir_name));
  83 # else
  84 #  if !@HAVE_OPENDIR@
  85 _GL_FUNCDECL_SYS (opendir, DIR *, (const char *dir_name) _GL_ARG_NONNULL ((1)));
  86 #  endif
  87 _GL_CXXALIAS_SYS (opendir, DIR *, (const char *dir_name));
  88 # endif
  89 _GL_CXXALIASWARN (opendir);
  90 #elif defined GNULIB_POSIXCHECK
  91 # undef opendir
  92 # if HAVE_RAW_DECL_OPENDIR
  93 _GL_WARN_ON_USE (opendir, "opendir is not portable - "
  94                  "use gnulib module opendir for portability");
  95 # endif
  96 #endif
  97
  98 #if @GNULIB_READDIR@
  99 # if !@HAVE_READDIR@
 100 _GL_FUNCDECL_SYS (readdir, struct dirent *, (DIR *dirp) _GL_ARG_NONNULL ((1)));
 101 # endif
 102 _GL_CXXALIAS_SYS (readdir, struct dirent *, (DIR *dirp));
 103 _GL_CXXALIASWARN (readdir);
 104 #elif defined GNULIB_POSIXCHECK
 105 # undef readdir
 106 # if HAVE_RAW_DECL_READDIR
 107 _GL_WARN_ON_USE (readdir, "readdir is not portable - "
 108                  "use gnulib module readdir for portability");
 109 # endif
 110 #endif
 111
 112 #if @GNULIB_REWINDDIR@
 113 # if !@HAVE_REWINDDIR@
 114 _GL_FUNCDECL_SYS (rewinddir, void, (DIR *dirp) _GL_ARG_NONNULL ((1)));
 115 # endif
 116 _GL_CXXALIAS_SYS (rewinddir, void, (DIR *dirp));
 117 _GL_CXXALIASWARN (rewinddir);
 118 #elif defined GNULIB_POSIXCHECK
 119 # undef rewinddir
 120 # if HAVE_RAW_DECL_REWINDDIR
 121 _GL_WARN_ON_USE (rewinddir, "rewinddir is not portable - "
 122                  "use gnulib module rewinddir for portability");
 123 # endif
 124 #endif
 125
 126 #if @GNULIB_CLOSEDIR@
 127 # if @REPLACE_CLOSEDIR@
 128 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 129 #   undef closedir
 130 #   define closedir rpl_closedir
 131 #  endif
 132 _GL_FUNCDECL_RPL (closedir, int, (DIR *dirp) _GL_ARG_NONNULL ((1)));
 133 _GL_CXXALIAS_RPL (closedir, int, (DIR *dirp));
 134 # else
 135 #  if !@HAVE_CLOSEDIR@
 136 _GL_FUNCDECL_SYS (closedir, int, (DIR *dirp) _GL_ARG_NONNULL ((1)));
 137 #  endif
 138 _GL_CXXALIAS_SYS (closedir, int, (DIR *dirp));
 139 # endif
 140 _GL_CXXALIASWARN (closedir);
 141 #elif defined GNULIB_POSIXCHECK
 142 # undef closedir
 143 # if HAVE_RAW_DECL_CLOSEDIR
 144 _GL_WARN_ON_USE (closedir, "closedir is not portable - "
 145                  "use gnulib module closedir for portability");
 146 # endif
 147 #endif
 148
 149 #if @GNULIB_DIRFD@
 150 /* Return the file descriptor associated with the given directory stream,
 151    or -1 if none exists.  */
 152 # if @REPLACE_DIRFD@
 153 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 154 #   undef dirfd
 155 #   define dirfd rpl_dirfd
 156 #  endif
 157 _GL_FUNCDECL_RPL (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
 158 _GL_CXXALIAS_RPL (dirfd, int, (DIR *));
 159 # else
 160 #  if defined __cplusplus && defined GNULIB_NAMESPACE && defined dirfd
 161     /* dirfd is defined as a macro and not as a function.
 162        Turn it into a function and get rid of the macro.  */
 163 static inline int (dirfd) (DIR *dp) { return dirfd (dp); }
 164 #   undef dirfd
 165 #  endif
 166 #  if !(@HAVE_DECL_DIRFD@ || defined dirfd)
 167 _GL_FUNCDECL_SYS (dirfd, int, (DIR *) _GL_ARG_NONNULL ((1)));
 168 #  endif
 169 _GL_CXXALIAS_SYS (dirfd, int, (DIR *));
 170 # endif
 171 _GL_CXXALIASWARN (dirfd);
 172 #elif defined GNULIB_POSIXCHECK
 173 # undef dirfd
 174 # if HAVE_RAW_DECL_DIRFD
 175 _GL_WARN_ON_USE (dirfd, "dirfd is unportable - "
 176                  "use gnulib module dirfd for portability");
 177 # endif
 178 #endif
 179
 180 #if @GNULIB_FDOPENDIR@
 181 /* Open a directory stream visiting the given directory file
 182    descriptor.  Return NULL and set errno if fd is not visiting a
 183    directory.  On success, this function consumes fd (it will be
 184    implicitly closed either by this function or by a subsequent
 185    closedir).  */
 186 # if @REPLACE_FDOPENDIR@
 187 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 188 #   undef fdopendir
 189 #   define fdopendir rpl_fdopendir
 190 #  endif
 191 _GL_FUNCDECL_RPL (fdopendir, DIR *, (int fd));
 192 _GL_CXXALIAS_RPL (fdopendir, DIR *, (int fd));
 193 # else
 194 #  if !@HAVE_FDOPENDIR@ || !@HAVE_DECL_FDOPENDIR@
 195 _GL_FUNCDECL_SYS (fdopendir, DIR *, (int fd));
 196 #  endif
 197 _GL_CXXALIAS_SYS (fdopendir, DIR *, (int fd));
 198 # endif
 199 _GL_CXXALIASWARN (fdopendir);
 200 #elif defined GNULIB_POSIXCHECK
 201 # undef fdopendir
 202 # if HAVE_RAW_DECL_FDOPENDIR
 203 _GL_WARN_ON_USE (fdopendir, "fdopendir is unportable - "
 204                  "use gnulib module fdopendir for portability");
 205 # endif
 206 #endif
 207
 208 #if @GNULIB_SCANDIR@
 209 /* Scan the directory DIR, calling FILTER on each directory entry.
 210    Entries for which FILTER returns nonzero are individually malloc'd,
 211    sorted using qsort with CMP, and collected in a malloc'd array in
 212    *NAMELIST.  Returns the number of entries selected, or -1 on error.  */
 213 # if !@HAVE_SCANDIR@
 214 _GL_FUNCDECL_SYS (scandir, int,
 215                   (const char *dir, struct dirent ***namelist,
 216                    int (*filter) (const struct dirent *),
 217                    int (*cmp) (const struct dirent **, const struct dirent **))
 218                   _GL_ARG_NONNULL ((1, 2, 4)));
 219 # endif
 220 /* Need to cast, because on glibc systems, the fourth parameter is
 221                         int (*cmp) (const void *, const void *).  */
 222 _GL_CXXALIAS_SYS_CAST (scandir, int,
 223                        (const char *dir, struct dirent ***namelist,
 224                         int (*filter) (const struct dirent *),
 225                         int (*cmp) (const struct dirent **, const struct dirent **)));
 226 _GL_CXXALIASWARN (scandir);
 227 #elif defined GNULIB_POSIXCHECK
 228 # undef scandir
 229 # if HAVE_RAW_DECL_SCANDIR
 230 _GL_WARN_ON_USE (scandir, "scandir is unportable - "
 231                  "use gnulib module scandir for portability");
 232 # endif
 233 #endif
 234
 235 #if @GNULIB_ALPHASORT@
 236 /* Compare two 'struct dirent' entries alphabetically.  */
 237 # if !@HAVE_ALPHASORT@
 238 _GL_FUNCDECL_SYS (alphasort, int,
 239                   (const struct dirent **, const struct dirent **)
 240                   _GL_ATTRIBUTE_PURE
 241                   _GL_ARG_NONNULL ((1, 2)));
 242 # endif
 243 /* Need to cast, because on glibc systems, the parameters are
 244                        (const void *, const void *).  */
 245 _GL_CXXALIAS_SYS_CAST (alphasort, int,
 246                        (const struct dirent **, const struct dirent **));
 247 _GL_CXXALIASWARN (alphasort);
 248 #elif defined GNULIB_POSIXCHECK
 249 # undef alphasort
 250 # if HAVE_RAW_DECL_ALPHASORT
 251 _GL_WARN_ON_USE (alphasort, "alphasort is unportable - "
 252                  "use gnulib module alphasort for portability");
 253 # endif
 254 #endif
 255
 256
 257 #endif /* _@GUARD_PREFIX@_DIRENT_H */
 258 #endif /* _@GUARD_PREFIX@_DIRENT_H */