/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Common code and structures used by name-service-switch "user" backends.
 */

#ifndef _USER_COMMON_H
#define _USER_COMMON_H

#include <nss_common.h>
#include <nss_dbdefs.h>
#include <stdio.h>

#ifdef  __cplusplus
extern "C" {
#endif

typedef struct user_backend *user_backend_ptr_t;
typedef nss_status_t    (*user_backend_op_t)(user_backend_ptr_t, void *);



struct user_backend {
        user_backend_op_t       *ops;
        int                     n_ops;
        const char              *filename;
        FILE                    *f;
        int                     minbuf;
        char                    *buf;
};

/*
 * Iterator function for _nss_user_do_all()
 *   NSS_NOTFOUND means "keep enumerating", NSS_SUCCESS means"return now",
 *   other values don't make much sense.  In other words we're abusing
 *   (overloading) the meaning of nss_status_t, but hey...
 * _nss_user_XY_all() is a wrapper around _nss_user_do_all() that does the
 *   generic work for nss_XbyY_args_t backends (calls cstr2ent etc).
 */
typedef nss_status_t    (*user_do_all_func_t)(const char *, int, void *args);
typedef int             (*user_XY_check_func)(nss_XbyY_args_t *);

#if defined(__STDC__)
extern nss_backend_t    *_nss_user_constr(user_backend_op_t     *ops,
                                        int                     n_ops,
                                        const char              *filename,
                                        int                     min_bufsize);
extern nss_status_t     _nss_user_destr(user_backend_ptr_t, void *dummy);
extern nss_status_t     _nss_user_setent(user_backend_ptr_t, void *dummy);
extern nss_status_t     _nss_user_endent(user_backend_ptr_t, void *dummy);
extern nss_status_t     _nss_user_do_all(user_backend_ptr_t,
                                        void                    *func_priv,
                                        const char              *filter,
                                        user_do_all_func_t      func);
extern nss_status_t     _nss_user_XY_all(user_backend_ptr_t     be,
                                        nss_XbyY_args_t         *args,
                                        int                     netdb,
                                        const char              *filter,
                                        user_XY_check_func      check);
extern int              _nss_user_read_line(FILE                *f,
                                        char                    *buffer,
                                        int                     buflen);
#else
extern nss_backend_t    *_nss_user_constr();
extern nss_status_t     _nss_user_destr();
extern nss_status_t     _nss_user_setent();
extern nss_status_t     _nss_user_endent();
extern nss_status_t     _nss_user_do_all();
extern nss_status_t     _nss_user_XY_all();
extern int              _nss_user_read_line();
#endif

#ifdef  __cplusplus
}
#endif

#endif /* _USER_COMMON_H */