/*

 * lookup.c --- ext2fs directory lookup operations

 *

 * Copyright (C) 1993, 1994, 1994, 1995 Theodore Ts'o.

 *

 * %Begin-Header%

 * This file may be redistributed under the terms of the GNU Library

 * General Public License, version 2.

 * %End-Header%

 */

#include "config.h"

#include <stdio.h>

#include <string.h>

#if HAVE_UNISTD_H

#include <unistd.h>

#endif

#include "ext2_fs.h"

#include "ext2fs.h"

struct lookup_struct  {

  const char  *name;

  int   len;

  ext2_ino_t  *inode;

  int   found;

};

#ifdef __TURBOC__

 #pragma argsused

#endif

static int lookup_proc(struct ext2_dir_entry *dirent,

           int  offset EXT2FS_ATTR((unused)),

           int  blocksize EXT2FS_ATTR((unused)),

           char *buf EXT2FS_ATTR((unused)),

           void *priv_data)

{

  struct lookup_struct *ls = (struct lookup_struct *) priv_data;

  if (ls->len != ext2fs_dirent_name_len(dirent))

    return 0;

  if (strncmp(ls->name, dirent->name, ext2fs_dirent_name_len(dirent)))

    return 0;

  *ls->inode = dirent->inode;

  ls->found++;

  return DIRENT_ABORT;

}

errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name,

      int namelen, char *buf, ext2_ino_t *inode)

{

  errcode_t retval;

  struct lookup_struct ls;

  EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

  ls.name = name;

  ls.len = namelen;

  ls.inode = inode;

  ls.found = 0;

  retval = ext2fs_dir_iterate(fs, dir, 0, buf, lookup_proc, &ls);

  if (retval)

    return retval;

  return (ls.found) ? 0 : EXT2_ET_FILE_NOT_FOUND;

}