source: MondoRescue/branches/stable/mindi-busybox/e2fsprogs/ext2fs/lookup.c@ 821

/*
 * 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 Public
 * License.
 * %End-Header%
 */

#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 != (dirent->name_len & 0xFF))
        return 0;
    if (strncmp(ls->name, dirent->name, (dirent->name_len & 0xFF)))
        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;
}