lib/ext2fs/dblist_dir.c

   1 /*
   2  * dblist_dir.c --- iterate by directory entry
   3  *
   4  * Copyright 1997 by Theodore Ts'o
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  *
  11  */
  12
  13 #include <stdio.h>
  14 #if HAVE_UNISTD_H
  15 #include <unistd.h>
  16 #endif
  17 #include <string.h>
  18 #include <time.h>
  19
  20 #if EXT2_FLAT_INCLUDES
  21 #include "ext2_fs.h"
  22 #else
  23 #include <linux/ext2_fs.h>
  24 #endif
  25
  26 #include "ext2fsP.h"
  27
  28 static int db_dir_proc(ext2_filsys fs, struct ext2_db_entry *db_info,
  29                        void *priv_data);
  30
  31 extern errcode_t
  32         ext2fs_dblist_dir_iterate(ext2_dblist dblist,
  33                                   int   flags,
  34                                   char  *block_buf,
  35                                   int (*func)(ino_t     dir,
  36                                               int       entry,
  37                                               struct ext2_dir_entry *dirent,
  38                                               int       offset,
  39                                               int       blocksize,
  40                                               char      *buf,
  41                                               void      *priv_data),
  42                                   void *priv_data)
  43 {
  44         errcode_t               retval;
  45         struct dir_context      ctx;
  46
  47         EXT2_CHECK_MAGIC(dblist, EXT2_ET_MAGIC_DBLIST);
  48
  49         ctx.dir = 0;
  50         ctx.flags = flags;
  51         if (block_buf)
  52                 ctx.buf = block_buf;
  53         else {
  54                 retval = ext2fs_get_mem(dblist->fs->blocksize,
  55                                         (void **) &ctx.buf);
  56                 if (retval)
  57                         return retval;
  58         }
  59         ctx.func = 0;
  60         ctx.func2 = func;
  61         ctx.priv_data = priv_data;
  62         ctx.errcode = 0;
  63
  64         retval = ext2fs_dblist_iterate(dblist, db_dir_proc, &ctx);
  65
  66         if (!block_buf)
  67                 ext2fs_free_mem((void **) &ctx.buf);
  68         if (retval)
  69                 return retval;
  70         return ctx.errcode;
  71 }
  72
  73 static int db_dir_proc(ext2_filsys fs, struct ext2_db_entry *db_info,
  74                        void *priv_data)
  75 {
  76         struct dir_context      *ctx;
  77
  78         ctx = (struct dir_context *) priv_data;
  79         ctx->dir = db_info->ino;
  80
  81         return ext2fs_process_dir_block(fs, &db_info->blk,
  82                                         db_info->blockcnt, 0, 0, priv_data);
  83 }