io/ftw.h

   1 /* Copyright (C) 1992,1996,1997,1998,1999,2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   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.
   8
   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
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /*
  20  *      X/Open Portability Guide 4.2: ftw.h
  21  */
  22
  23 #ifndef _FTW_H
  24 #define _FTW_H  1
  25
  26 #include <features.h>
  27
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30
  31
  32 __BEGIN_DECLS
  33
  34 /* Values for the FLAG argument to the user function passed to `ftw'
  35    and 'nftw'.  */
  36 enum
  37 {
  38   FTW_F,                /* Regular file.  */
  39 #define FTW_F    FTW_F
  40   FTW_D,                /* Directory.  */
  41 #define FTW_D    FTW_D
  42   FTW_DNR,              /* Unreadable directory.  */
  43 #define FTW_DNR  FTW_DNR
  44   FTW_NS,               /* Unstatable file.  */
  45 #define FTW_NS   FTW_NS
  46
  47 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
  48
  49   FTW_SL,               /* Symbolic link.  */
  50 # define FTW_SL  FTW_SL
  51 #endif
  52
  53 #ifdef __USE_XOPEN_EXTENDED
  54 /* These flags are only passed from the `nftw' function.  */
  55   FTW_DP,               /* Directory, all subdirs have been visited. */
  56 # define FTW_DP  FTW_DP
  57   FTW_SLN               /* Symbolic link naming non-existing file.  */
  58 # define FTW_SLN FTW_SLN
  59
  60 #endif  /* extended X/Open */
  61 };
  62
  63
  64 #ifdef __USE_XOPEN_EXTENDED
  65 /* Flags for fourth argument of `nftw'.  */
  66 enum
  67 {
  68   FTW_PHYS = 1,         /* Perform physical walk, ignore symlinks.  */
  69 # define FTW_PHYS       FTW_PHYS
  70   FTW_MOUNT = 2,        /* Report only files on same file system as the
  71                            argument.  */
  72 # define FTW_MOUNT      FTW_MOUNT
  73   FTW_CHDIR = 4,        /* Change to current directory while processing it.  */
  74 # define FTW_CHDIR      FTW_CHDIR
  75   FTW_DEPTH = 8         /* Report files in directory before directory itself.*/
  76 # define FTW_DEPTH      FTW_DEPTH
  77 };
  78
  79 /* Structure used for fourth argument to callback function for `nftw'.  */
  80 struct FTW
  81   {
  82     int base;
  83     int level;
  84   };
  85 #endif  /* extended X/Open */
  86
  87
  88 /* Convenient types for callback functions.  */
  89 typedef int (*__ftw_func_t) (__const char *__filename,
  90                              __const struct stat *__status, int __flag);
  91 #ifdef __USE_LARGEFILE64
  92 typedef int (*__ftw64_func_t) (__const char *__filename,
  93                                __const struct stat64 *__status, int __flag);
  94 #endif
  95 #ifdef __USE_XOPEN_EXTENDED
  96 typedef int (*__nftw_func_t) (__const char *__filename,
  97                               __const struct stat *__status, int __flag,
  98                               struct FTW *__info);
  99 # ifdef __USE_LARGEFILE64
 100 typedef int (*__nftw64_func_t) (__const char *__filename,
 101                                 __const struct stat64 *__status,
 102                                 int __flag, struct FTW *__info);
 103 # endif
 104 #endif
 105
 106 /* Call a function on every element in a directory tree.
 107
 108    This function is a possible cancellation point and therefore not
 109    marked with __THROW.  */
 110 #ifndef __USE_FILE_OFFSET64
 111 extern int ftw (__const char *__dir, __ftw_func_t __func, int __descriptors);
 112 #else
 113 # ifdef __REDIRECT
 114 extern int __REDIRECT (ftw, (__const char *__dir, __ftw_func_t __func,
 115                              int __descriptors), ftw64);
 116 # else
 117 #  define ftw ftw64
 118 # endif
 119 #endif
 120 #ifdef __USE_LARGEFILE64
 121 extern int ftw64 (__const char *__dir, __ftw64_func_t __func,
 122                   int __descriptors);
 123 #endif
 124
 125 #ifdef __USE_XOPEN_EXTENDED
 126 /* Call a function on every element in a directory tree.  FLAG allows
 127    to specify the behaviour more detailed.
 128
 129    This function is a possible cancellation point and therefore not
 130    marked with __THROW.  */
 131 # ifndef __USE_FILE_OFFSET64
 132 extern int nftw (__const char *__dir, __nftw_func_t __func, int __descriptors,
 133                  int __flag);
 134 # else
 135 #  ifdef __REDIRECT
 136 extern int __REDIRECT (nftw, (__const char *__dir, __nftw_func_t __func,
 137                               int __descriptors, int __flag), nftw64);
 138 #  else
 139 #   define nftw nftw64
 140 #  endif
 141 # endif
 142 # ifdef __USE_LARGEFILE64
 143 extern int nftw64 (__const char *__dir, __nftw64_func_t __func,
 144                    int __descriptors, int __flag);
 145 # endif
 146 #endif
 147
 148 __END_DECLS
 149
 150 #endif  /* ftw.h */