/* Common database open/close routines for nss_db.

   Copyright (C) 1999-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _NSS_DB_H

#define _NSS_DB_H	1

#include <nss.h>

#include <stdint.h>

#include <libc-lock.h>

/* String table index type.  */

typedef uint32_t stridx_t;

/* Database file header.  */

struct nss_db_header

{

  uint32_t magic;

#define NSS_DB_MAGIC 0xdd110601

  uint32_t ndbs;

  uint64_t valstroffset;

  uint64_t valstrlen;

  uint64_t allocate;

  struct

  {

    char id;

    char pad[sizeof (uint32_t) - 1];

    uint32_t hashsize;

    uint64_t hashoffset;

    uint64_t keyidxoffset;

    uint64_t keystroffset;

  } dbs[0];

};

/* Information about mapped database.  */

struct nss_db_map

{

  struct nss_db_header *header;

  size_t len;

};

/* Open the database stored in FILE.  If succesful, store the database

   handle in *MAPPINGP or a file descriptor for the file in *FDP and

   return NSS_STATUS_SUCCESS.  On failure, return the appropriate

   lookup status.  */

enum nss_status internal_setent (const char *file,

				 struct nss_db_map *mappingp);

/* Close the database FD.  */

extern void internal_endent (struct nss_db_map *mapping);

#endif	/* nss_db.h */