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Mon Aug 12 04:33:09 1996 Ulrich Drepper <drepper@cygnus.com> * nss/nsswitch.c (__nss_database_lookup): Always release locks before returning. Reported by Miles Bader. (distributes): Add databases.def.
131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
/* Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _NSSWITCH_H
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#define _NSSWITCH_H 1
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/* This is an *internal* header. */
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#include <arpa/nameser.h>
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#include <netinet/in.h>
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#include <nss.h>
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#include <resolv.h>
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#include <search.h>
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/* Actions performed after lookup finished. */
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typedef enum
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{
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NSS_ACTION_CONTINUE,
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NSS_ACTION_RETURN
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} lookup_actions;
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typedef struct service_library
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{
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/* Name of service (`files', `dns', `nis', ...). */
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const char *name;
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/* Pointer to the loaded shared library. */
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void *lib_handle;
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/* And the link to the next entry. */
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struct service_library *next;
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} service_library;
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/* For mapping a function name to a function pointer. It is known in
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nsswitch.c:nss_lookup_function that a string pointer for the lookup key
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is the first member. */
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typedef struct
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{
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const char *fct_name;
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void *fct_ptr;
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} known_function;
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typedef struct service_user
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{
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/* Name of the service (`files', `dns', `nis', ...). */
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const char *name;
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/* Action according to result. */
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lookup_actions actions[4];
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/* Link to the underlying library object. */
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service_library *library;
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/* Collection of known functions. */
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struct entry *known;
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/* And the link to the next entry. */
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struct service_user *next;
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} service_user;
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/* To access the action based on the status value use this macro. */
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#define nss_next_action(ni, status) ((ni)->actions[2 + status])
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typedef struct name_database_entry
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{
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/* Name of the database. */
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const char *name;
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/* List of service to be used. */
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service_user *service;
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/* And the link to the next entry. */
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struct name_database_entry *next;
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} name_database_entry;
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typedef struct name_database
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{
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/* List of all known databases. */
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name_database_entry *entry;
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/* List of libraries with service implementation. */
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service_library *library;
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} name_database;
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/* Interface functions for NSS. */
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/* Get the data structure representing the specified database.
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If there is no configuration for this database in the file,
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parse a service list from DEFCONFIG and use that. More
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than one function can use the database. */
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int __nss_database_lookup (const char *database, const char *defconfig,
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service_user **ni);
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/* Put first function with name FCT_NAME for SERVICE in FCTP. The
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position is remembered in NI. The function returns a value < 0 if
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an error occured or no such function exists. */
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int __nss_lookup (service_user **ni, const char *fct_name, void **fctp);
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/* Determine the next step in the lookup process according to the
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result STATUS of the call to the last function returned by
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`__nss_lookup' or `__nss_next'. NI specifies the last function
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examined. The function return a value > 0 if the process should
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stop with the last result of the last function call to be the
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result of the entire lookup. The returned valie is 0 if there is
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another function to use and < 0 if an error occured.
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If ALL_VALUES is nonzero, the return value will not be > 0 as long as
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there is a possibility the lookup process can ever use following
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services. In other words, only if all four lookup results have
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the action RETURN associated the lookup process stops before the
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natural end. */
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int __nss_next (service_user **ni, const char *fct_name, void **fctp,
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int status, int all_values);
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#endif /* nsswitch.h */
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