fs/ext2/ext2_opendir.c

   1 /*
   2  *
   3  * (c) 2008-2009 Laurent Vivier <Laurent@lvivier.info>
   4  *
   5  * This file has been copied from EMILE, http://emile.sf.net
   6  *
   7  */
   8
   9 #include "libext2.h"
  10 #include "ext2.h"
  11 #include "ext2_utils.h"
  12
  13 ext2_DIR* ext2_opendir(ext2_VOLUME *volume, const char *name)
  14 {
  15         ext2_DIR* dir;
  16         int ino;
  17         struct ext2_inode *inode;
  18         int ret;
  19
  20         ino = ext2_seek_name(volume, name);
  21         if (ino == 0)
  22                 return NULL;
  23
  24         inode = (struct ext2_inode*)malloc(sizeof(struct ext2_inode));
  25         if (inode == NULL)
  26                 return NULL;
  27
  28         ret = ext2_get_inode(volume, ino, inode);
  29         if (ret == -1) {
  30                 free(inode);
  31                 return NULL;
  32         }
  33
  34         if (!S_ISDIR(inode->i_mode)) {
  35                 free(inode);
  36                 return NULL;
  37         }
  38
  39         dir = (ext2_DIR*)malloc(sizeof(ext2_DIR));
  40         if (dir == NULL) {
  41                 free(inode);
  42                 return NULL;
  43         }
  44         dir->volume = (ext2_VOLUME*)volume;
  45         dir->inode = inode;
  46         dir->index = 0;
  47
  48         return dir;
  49 }