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 <stdlib.h>
  18 #include <string.h>
  19 #include <time.h>
  20 #ifdef HAVE_ERRNO_H
  21 #include <errno.h>
  22 #endif
  23
  24 #include <linux/ext2_fs.h>
  25
  26 #include "ext2fsP.h"
  27
  28 static int db_dir_proc(ext2_filsys fs, struct ext2_db_entry *db_info,
  29                        void *private);
  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      *private),
  42                                   void *private)
  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                 ctx.buf = malloc(dblist->fs->blocksize);
  55                 if (!ctx.buf)
  56                         return ENOMEM;
  57         }
  58         ctx.func = 0;
  59         ctx.func2 = func;
  60         ctx.private = private;
  61         ctx.errcode = 0;
  62
  63         retval = ext2fs_dblist_iterate(dblist, db_dir_proc, &ctx);
  64
  65         if (!block_buf)
  66                 free(ctx.buf);
  67         if (retval)
  68                 return retval;
  69         return ctx.errcode;
  70 }
  71
  72 static int db_dir_proc(ext2_filsys fs, struct ext2_db_entry *db_info,
  73                        void *private)
  74 {
  75         struct dir_context      *ctx = private;
  76
  77         ctx->dir = db_info->ino;
  78
  79         return ext2fs_process_dir_block(fs, &db_info->blk,
  80                                         db_info->blockcnt, private);
  81 }