/* $NetBSD: nsswitch.h,v 1.21 2011/07/17 20:54:34 joerg Exp $ */
/*-
* Copyright ( c ) 1997 , 1998 , 1999 , 2004 The NetBSD Foundation , Inc .
* All rights reserved .
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn .
*
* Redistribution and use in source and binary forms , with or without
* modification , are permitted provided that the following conditions
* are met :
* 1 . Redistributions of source code must retain the above copyright
* notice , this list of conditions and the following disclaimer .
* 2 . Redistributions in binary form must reproduce the above copyright
* notice , this list of conditions and the following disclaimer in the
* documentation and / or other materials provided with the distribution .
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION , INC . AND CONTRIBUTORS
* ` ` AS IS ' ' AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT LIMITED
* TO , THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED . IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT , INDIRECT , INCIDENTAL , SPECIAL , EXEMPLARY , OR
* CONSEQUENTIAL DAMAGES ( INCLUDING , BUT NOT LIMITED TO , PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES ; LOSS OF USE , DATA , OR PROFITS ; OR BUSINESS
* INTERRUPTION ) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY , WHETHER IN
* CONTRACT , STRICT LIABILITY , OR TORT ( INCLUDING NEGLIGENCE OR OTHERWISE )
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE , EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE .
*/
#ifndef _NSSWITCH_H
#define _NSSWITCH_H 1
#include <sys/types.h>
#include <stdarg.h>
#define NSS_MODULE_INTERFACE_VERSION 0
#ifndef _PATH_NS_CONF
#define _PATH_NS_CONF "/etc/nsswitch.conf"
#endif
#define NS_CONTINUE 0
#define NS_RETURN 1
/*
* Layout of :
* uint32_t ns_src . flags
*/
/* nsswitch.conf status codes and nsdispatch(3) return values */
#define NS_SUCCESS (1 <<0 ) /* entry was found */
#define NS_UNAVAIL (1 <<1 ) /* source not responding, or corrupt */
#define NS_NOTFOUND (1 <<2 ) /* source responded 'no such entry' */
#define NS_TRYAGAIN (1 <<3 ) /* source busy, may respond to retrys */
#define NS_STATUSMASK 0 x000000ff /* bitmask to get the status flags */
/* internal nsdispatch(3) flags; not settable in nsswitch.conf(5) */
#define NS_FORCEALL (1 <<8 ) /* force all methods to be invoked; */
/*
* Currently implemented sources .
*/
#define NSSRC_FILES "files" /* local files */
#define NSSRC_DNS "dns" /* DNS; IN for hosts, HS for others */
#define NSSRC_NIS "nis" /* YP/NIS */
#define NSSRC_COMPAT "compat" /* passwd,group in YP compat mode */
/*
* Currently implemented databases .
*/
#define NSDB_HOSTS "hosts"
#define NSDB_GROUP "group"
#define NSDB_GROUP_COMPAT "group_compat"
#define NSDB_NETGROUP "netgroup"
#define NSDB_NETWORKS "networks"
#define NSDB_PASSWD "passwd"
#define NSDB_PASSWD_COMPAT "passwd_compat"
#define NSDB_SHELLS "shells"
/*
* Suggested databases to implement .
*/
#define NSDB_ALIASES "aliases"
#define NSDB_AUTH "auth"
#define NSDB_AUTOMOUNT "automount"
#define NSDB_BOOTPARAMS "bootparams"
#define NSDB_ETHERS "ethers"
#define NSDB_EXPORTS "exports"
#define NSDB_NETMASKS "netmasks"
#define NSDB_PHONES "phones"
#define NSDB_PRINTCAP "printcap"
#define NSDB_PROTOCOLS "protocols"
#define NSDB_REMOTE "remote"
#define NSDB_RPC "rpc"
#define NSDB_SENDMAILVARS "sendmailvars"
#define NSDB_SERVICES "services"
#define NSDB_TERMCAP "termcap"
#define NSDB_TTYS "ttys"
/*
* ns_dtab ` callback ' function signature .
*/
typedef int (*nss_method)(void *, void *, va_list);
/*
* ns_dtab - ` nsswitch dispatch table '
* Contains an entry for each source and the appropriate function to call .
*/
typedef struct {
const char *src;
nss_method callback;
void *cb_data;
} ns_dtab;
/*
* Macros to help build an ns_dtab [ ]
*/
#define NS_FILES_CB(F,C) { NSSRC_FILES, F, __UNCONST(C) },
#define NS_COMPAT_CB(F,C) { NSSRC_COMPAT, F, __UNCONST(C) },
#ifdef HESIOD
# define NS_DNS_CB(F,C) { NSSRC_DNS, F, __UNCONST(C) },
#else
# define NS_DNS_CB(F,C)
#endif
#ifdef YP
# define NS_NIS_CB(F,C) { NSSRC_NIS, F, __UNCONST(C) },
#else
# define NS_NIS_CB(F,C)
#endif
#define NS_NULL_CB { .src = NULL },
/*
* ns_src - ` nsswitch source '
* Used by the nsparser routines to store a mapping between a source
* and its dispatch control flags for a given database .
*/
typedef struct {
const char *name;
uint32_t flags;
} ns_src;
/*
* ns_mtab - ` nsswitch method table '
* An nsswitch module provides a mapping from ( database name , method name )
* tuples to the nss_method and associated callback data . Effectively ,
* ns_dtab , but used for dynamically loaded modules .
*/
typedef struct {
const char *database;
const char *name;
nss_method method;
void *mdata;
} ns_mtab;
/*
* nss_module_register_fn - module registration function
* called at module load
* nss_module_unregister_fn - module un - registration function
* called at module unload
*/
typedef void (*nss_module_unregister_fn)(ns_mtab *, u_int);
typedef ns_mtab *(*nss_module_register_fn)(const char *, u_int *,
nss_module_unregister_fn *);
#ifdef _NS_PRIVATE
/*
* Private data structures for back - end nsswitch implementation .
*/
/*
* ns_dbt - ` nsswitch database thang '
* For each database in / etc / nsswitch . conf there is a ns_dbt , with its
* name and a list of ns_src ' s containing the source information .
*/
typedef struct {
const char *name; /* name of database */
ns_src *srclist; /* list of sources */
u_int srclistsize; /* size of srclist */
} ns_dbt;
/*
* ns_mod - ` nsswitch module '
*/
typedef struct {
const char *name; /* module name */
void *handle; /* handle from dlopen() */
ns_mtab *mtab; /* method table */
u_int mtabsize; /* size of mtab */
/* called to unload module */
nss_module_unregister_fn unregister;
} ns_mod;
#endif /* _NS_PRIVATE */
#include <sys/cdefs.h>
__BEGIN_DECLS
int nsdispatch(void *, const ns_dtab [], const char *,
const char *, const ns_src [], ...);
#ifdef _NS_PRIVATE
int _nsdbtaddsrc(ns_dbt *, const ns_src *);
void _nsdbtdump(const ns_dbt *);
int _nsdbtput(const ns_dbt *);
void _nsyyerror(const char *);
int _nsyylex(void );
#endif /* _NS_PRIVATE */
__END_DECLS
#endif /* !_NSSWITCH_H */
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