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247 lines
7.2 KiB
C
247 lines
7.2 KiB
C
/* $NetBSD: nsswitch.h,v 1.6 1999/01/26 01:04:07 lukem Exp $ */
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/* $FreeBSD$ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-NetBSD
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*
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* Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Luke Mewburn.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _NSSWITCH_H
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#define _NSSWITCH_H 1
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#include <sys/types.h>
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#include <stdarg.h>
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#define NSS_MODULE_INTERFACE_VERSION 1
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#ifndef _PATH_NS_CONF
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#define _PATH_NS_CONF "/etc/nsswitch.conf"
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#endif
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/* NSS source actions */
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#define NS_ACTION_CONTINUE 0 /* try the next source */
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#define NS_ACTION_RETURN 1 /* look no further */
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#define NS_SUCCESS (1<<0) /* entry was found */
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#define NS_UNAVAIL (1<<1) /* source not responding, or corrupt */
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#define NS_NOTFOUND (1<<2) /* source responded 'no such entry' */
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#define NS_TRYAGAIN (1<<3) /* source busy, may respond to retry */
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#define NS_RETURN (1<<4) /* stop search, e.g. for ERANGE */
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#define NS_TERMINATE (NS_SUCCESS|NS_RETURN) /* flags that end search */
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#define NS_STATUSMASK 0x000000ff /* bitmask to get the status flags */
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/*
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* currently implemented sources
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*/
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#define NSSRC_FILES "files" /* local files */
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#define NSSRC_DB "db" /* database */
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#define NSSRC_DNS "dns" /* DNS; IN for hosts, HS for others */
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#define NSSRC_NIS "nis" /* YP/NIS */
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#define NSSRC_COMPAT "compat" /* passwd,group in YP compat mode */
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#define NSSRC_CACHE "cache" /* nscd daemon */
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#define NSSRC_FALLBACK "__fallback" /* internal fallback source */
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/*
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* currently implemented databases
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*/
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#define NSDB_HOSTS "hosts"
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#define NSDB_GROUP "group"
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#define NSDB_GROUP_COMPAT "group_compat"
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#define NSDB_NETGROUP "netgroup"
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#define NSDB_NETWORKS "networks"
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#define NSDB_PASSWD "passwd"
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#define NSDB_PASSWD_COMPAT "passwd_compat"
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#define NSDB_SHELLS "shells"
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#define NSDB_SERVICES "services"
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#define NSDB_SERVICES_COMPAT "services_compat"
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#define NSDB_SSH_HOSTKEYS "ssh_hostkeys"
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#define NSDB_PROTOCOLS "protocols"
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#define NSDB_RPC "rpc"
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/*
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* suggested databases to implement
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*/
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#define NSDB_ALIASES "aliases"
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#define NSDB_AUTH "auth"
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#define NSDB_AUTOMOUNT "automount"
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#define NSDB_BOOTPARAMS "bootparams"
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#define NSDB_ETHERS "ethers"
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#define NSDB_EXPORTS "exports"
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#define NSDB_NETMASKS "netmasks"
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#define NSDB_PHONES "phones"
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#define NSDB_PRINTCAP "printcap"
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#define NSDB_REMOTE "remote"
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#define NSDB_SENDMAILVARS "sendmailvars"
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#define NSDB_TERMCAP "termcap"
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#define NSDB_TTYS "ttys"
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/*
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* ns_dtab `method' function signature.
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*/
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typedef int (*nss_method)(void *_retval, void *_mdata, va_list _ap);
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/*
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* Macro for generating method prototypes.
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*/
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#define NSS_METHOD_PROTOTYPE(method) \
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int method(void *, void *, va_list)
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/*
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* ns_dtab - `nsswitch dispatch table'
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* Contains an entry for each source and the appropriate function to
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* call. ns_dtabs are used in the nsdispatch() API in order to allow
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* the application to override built-in actions.
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*/
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typedef struct _ns_dtab {
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const char *src; /* Source this entry implements */
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nss_method method; /* Method to be called */
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void *mdata; /* Data passed to method */
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} ns_dtab;
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/*
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* macros to help build an ns_dtab[]
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*/
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#define NS_FILES_CB(F,C) { NSSRC_FILES, F, C },
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#define NS_COMPAT_CB(F,C) { NSSRC_COMPAT, F, C },
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#define NS_FALLBACK_CB(F) { NSSRC_FALLBACK, F, NULL },
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#ifdef HESIOD
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# define NS_DNS_CB(F,C) { NSSRC_DNS, F, C },
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#else
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# define NS_DNS_CB(F,C)
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#endif
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#ifdef YP
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# define NS_NIS_CB(F,C) { NSSRC_NIS, F, C },
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#else
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# define NS_NIS_CB(F,C)
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#endif
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/*
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* ns_src - `nsswitch source'
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* used by the nsparser routines to store a mapping between a source
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* and its dispatch control flags for a given database.
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*/
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typedef struct _ns_src {
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const char *name;
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u_int32_t flags;
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} ns_src;
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/*
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* default sourcelist (if nsswitch.conf is missing, corrupt,
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* or the requested database doesn't have an entry.
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*/
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extern const ns_src __nsdefaultsrc[];
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/*
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* ns_mtab - NSS method table
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* An NSS module provides a mapping from (database name, method name)
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* tuples to the nss_method and associated data.
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*/
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typedef struct _ns_mtab {
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const char *database;
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const char *name;
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nss_method method;
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void *mdata;
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} ns_mtab;
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/*
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* NSS module de-registration, called at module unload.
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*/
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typedef void (*nss_module_unregister_fn)(ns_mtab *, unsigned int);
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/*
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* NSS module registration, called at module load.
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*/
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typedef ns_mtab *(*nss_module_register_fn)(const char *, unsigned int *,
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nss_module_unregister_fn *);
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/*
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* Many NSS interfaces follow the getXXnam, getXXid, getXXent pattern.
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* Developers are encouraged to use nss_lookup_type where approriate.
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*/
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enum nss_lookup_type {
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nss_lt_name = 1,
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nss_lt_id = 2,
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nss_lt_all = 3
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};
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#ifdef _NS_PRIVATE
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/*
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* private data structures for back-end nsswitch implementation
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*/
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/*
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* ns_dbt - `nsswitch database thang'
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* for each database in /etc/nsswitch.conf there is a ns_dbt, with its
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* name and a list of ns_src's containing the source information.
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*/
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typedef struct _ns_dbt {
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const char *name; /* name of database */
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ns_src *srclist; /* list of sources */
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int srclistsize; /* size of srclist */
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} ns_dbt;
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/*
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* ns_mod - NSS module
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*/
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typedef struct _ns_mod {
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char *name; /* module name */
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void *handle; /* handle from dlopen */
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ns_mtab *mtab; /* method table */
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unsigned int mtabsize; /* count of entries in method table */
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nss_module_unregister_fn unregister; /* called to unload module */
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} ns_mod;
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#endif /* _NS_PRIVATE */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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extern int nsdispatch(void *, const ns_dtab [], const char *,
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const char *, const ns_src [], ...);
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#ifdef _NS_PRIVATE
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extern void _nsdbtaddsrc(ns_dbt *, const ns_src *);
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extern void _nsdbtput(const ns_dbt *);
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extern void _nsyyerror(const char *);
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extern int _nsyylex(void);
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extern int _nsyyparse(void);
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extern int _nsyylineno;
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#ifdef _NSS_DEBUG
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extern void _nsdbtdump(const ns_dbt *);
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#endif
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#endif /* _NS_PRIVATE */
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__END_DECLS
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#endif /* !_NSSWITCH_H */
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