mirror of git://sourceware.org/git/glibc.git
134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
/* Copyright (C) 1996, 1997, 1998, 1999 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _NSSWITCH_H
|
|
#define _NSSWITCH_H 1
|
|
|
|
/* This is an *internal* header. */
|
|
|
|
#include <arpa/nameser.h>
|
|
#include <netinet/in.h>
|
|
#include <nss.h>
|
|
#include <resolv.h>
|
|
#include <search.h>
|
|
#include <dlfcn.h>
|
|
|
|
/* Actions performed after lookup finished. */
|
|
typedef enum
|
|
{
|
|
NSS_ACTION_CONTINUE,
|
|
NSS_ACTION_RETURN
|
|
} lookup_actions;
|
|
|
|
|
|
typedef struct service_library
|
|
{
|
|
/* Name of service (`files', `dns', `nis', ...). */
|
|
const char *name;
|
|
/* Pointer to the loaded shared library. */
|
|
void *lib_handle;
|
|
/* And the link to the next entry. */
|
|
struct service_library *next;
|
|
} service_library;
|
|
|
|
|
|
/* For mapping a function name to a function pointer. It is known in
|
|
nsswitch.c:nss_lookup_function that a string pointer for the lookup key
|
|
is the first member. */
|
|
typedef struct
|
|
{
|
|
const char *fct_name;
|
|
void *fct_ptr;
|
|
} known_function;
|
|
|
|
|
|
typedef struct service_user
|
|
{
|
|
/* And the link to the next entry. */
|
|
struct service_user *next;
|
|
/* Action according to result. */
|
|
lookup_actions actions[5];
|
|
/* Link to the underlying library object. */
|
|
service_library *library;
|
|
/* Collection of known functions. */
|
|
struct entry *known;
|
|
/* Name of the service (`files', `dns', `nis', ...). */
|
|
char name[0];
|
|
} service_user;
|
|
|
|
/* To access the action based on the status value use this macro. */
|
|
#define nss_next_action(ni, status) ((ni)->actions[2 + status])
|
|
|
|
|
|
typedef struct name_database_entry
|
|
{
|
|
/* And the link to the next entry. */
|
|
struct name_database_entry *next;
|
|
/* List of service to be used. */
|
|
service_user *service;
|
|
/* Name of the database. */
|
|
char name[0];
|
|
} name_database_entry;
|
|
|
|
|
|
typedef struct name_database
|
|
{
|
|
/* List of all known databases. */
|
|
name_database_entry *entry;
|
|
/* List of libraries with service implementation. */
|
|
service_library *library;
|
|
} name_database;
|
|
|
|
|
|
/* Interface functions for NSS. */
|
|
|
|
/* Get the data structure representing the specified database.
|
|
If there is no configuration for this database in the file,
|
|
parse a service list from DEFCONFIG and use that. More
|
|
than one function can use the database. */
|
|
int __nss_database_lookup (const char *database, const char *alternative_name,
|
|
const char *defconfig, service_user **ni);
|
|
|
|
|
|
/* Put first function with name FCT_NAME for SERVICE in FCTP. The
|
|
position is remembered in NI. The function returns a value < 0 if
|
|
an error occurred or no such function exists. */
|
|
int __nss_lookup (service_user **ni, const char *fct_name, void **fctp);
|
|
|
|
/* Determine the next step in the lookup process according to the
|
|
result STATUS of the call to the last function returned by
|
|
`__nss_lookup' or `__nss_next'. NI specifies the last function
|
|
examined. The function return a value > 0 if the process should
|
|
stop with the last result of the last function call to be the
|
|
result of the entire lookup. The returned value is 0 if there is
|
|
another function to use and < 0 if an error occurred.
|
|
|
|
If ALL_VALUES is nonzero, the return value will not be > 0 as long as
|
|
there is a possibility the lookup process can ever use following
|
|
services. In other words, only if all four lookup results have
|
|
the action RETURN associated the lookup process stops before the
|
|
natural end. */
|
|
int __nss_next (service_user **ni, const char *fct_name, void **fctp,
|
|
int status, int all_values);
|
|
|
|
/* Search for the service described in NI for a function named FCT_NAME
|
|
and return a pointer to this function if successful. */
|
|
void *__nss_lookup_function (service_user *ni, const char *fct_name);
|
|
|
|
#endif /* nsswitch.h */
|