1 files changed, 138 insertions, 0 deletions
diff --git a/nss/nsswitch.h b/nss/nsswitch.h
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+++ b/nss/nsswitch.h
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+/* Copyright (C) 1996 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 <resolv.h>
+#include <search.h>
+
+
+/* Revision number of NSS interface (must be a string).  */
+#define NSS_SHLIB_REVISION ".1"
+
+
+/* Possible results of lookup using a nss_* function.  */
+enum nss_status
+{
+  NSS_STATUS_TRYAGAIN = -2,
+  NSS_STATUS_UNAVAIL,
+  NSS_STATUS_NOTFOUND,
+  NSS_STATUS_SUCCESS,
+};
+
+
+/* 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 mappng a function name to a function pointer.  */
+typedef struct
+{
+  const char *fct_name;
+  void *fct_ptr;
+} known_function;
+
+
+typedef struct service_user
+{
+  /* Name of the service (`files', `dns', `nis', ...).  */
+  const char *name;
+  /* Action according to result.  */
+  lookup_actions actions[4];
+  /* Link to the underlying library object.  */
+  service_library *library;
+  /* Collection of known functions.  */
+  struct entry *known;
+  /* And the link to the next entry.  */
+  struct service_user *next;
+} 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
+{
+  /* Name of the database.  */
+  const char *name;
+  /* List of service to be used.  */
+  service_user *service;
+  /* And the link to the next entry.  */
+  struct name_database_entry *next;
+} 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.  More
+   than one function can use the database.  */
+int __nss_database_lookup (const char *database, 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 occured 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 valie is 0 if there is
+   another function to use and < 0 if an error occured.
+
+   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);
+
+
+#endif	/* nsswitch.h */