files/common/files_common.h

	files_common.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 1995-2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * Common code and structures used by name-service-switch "files" backends.
 */

#ifndef _FILES_COMMON_H
#define _FILES_COMMON_H

#pragma ident   "%Z%%M% %I% %E% SMI"

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

#include "../../../libnsl/include/nsl_stdio_prv.h"

#ifdef  __cplusplus
extern "C" {
#endif

typedef struct files_backend *files_backend_ptr_t;
typedef nss_status_t    (*files_backend_op_t)(files_backend_ptr_t, void *);

typedef u_int (*files_hash_func)(nss_XbyY_args_t *, int);

typedef struct files_hashent {
    struct files_hashent    *h_first;
    struct files_hashent    *h_next;
    u_int           h_hash;
} files_hashent_t;

typedef struct {
    char            *l_start;
    int         l_len;
} files_linetab_t;

typedef struct {
    mutex_t     fh_lock;
    int     fh_resultsize;
    int     fh_bufsize;
    int     fh_nhtab;
    files_hash_func *fh_hash_func;
    int     fh_refcnt;
    int     fh_size;
    timestruc_t fh_mtime;
    char        *fh_file_start;
    char        *fh_file_end;
    files_linetab_t *fh_line;
    files_hashent_t *fh_table;
} files_hash_t;

struct files_backend {
    files_backend_op_t  *ops;
    int         n_ops;
    const char      *filename;
    __NSL_FILE      *f;
    int         minbuf;
    char            *buf;
    files_hash_t        *hashinfo;
};

/*
 * Iterator function for _nss_files_do_all(), which probably calls yp_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_files_XY_all() is a wrapper around _nss_files_do_all() that does the
 *   generic work for nss_XbyY_args_t backends (calls cstr2ent etc).
 */
typedef nss_status_t    (*files_do_all_func_t)(const char *, int, void *args);
typedef int     (*files_XY_check_func)(nss_XbyY_args_t *);

#if defined(__STDC__)
extern nss_backend_t    *_nss_files_constr(files_backend_op_t   *ops,
                    int         n_ops,
                    const char      *filename,
                    int         min_bufsize,
                    files_hash_t        *fhp);
extern nss_status_t _nss_files_destr (files_backend_ptr_t, void *dummy);
extern nss_status_t _nss_files_setent(files_backend_ptr_t, void *dummy);
extern nss_status_t _nss_files_endent(files_backend_ptr_t, void *dummy);
extern nss_status_t _nss_files_getent_rigid(files_backend_ptr_t, void *);
extern nss_status_t _nss_files_getent_netdb(files_backend_ptr_t, void *);
extern nss_status_t     _nss_files_do_all(files_backend_ptr_t,
                    void            *func_priv,
                    const char      *filter,
                    files_do_all_func_t func);
extern nss_status_t     _nss_files_XY_all(files_backend_ptr_t   be,
                    nss_XbyY_args_t     *args,
                    int             netdb,
                    const char      *filter,
                    files_XY_check_func check);
extern nss_status_t     _nss_files_XY_hash(files_backend_ptr_t  be,
                    nss_XbyY_args_t     *args,
                    int             netdb,
                    files_hash_t        *fhp,
                    int         hashop,
                    files_XY_check_func check);
int _nss_files_read_line(__NSL_FILE *f, char *buffer, int   buflen);
#else
extern nss_backend_t    *_nss_files_constr();
extern nss_status_t _nss_files_destr ();
extern nss_status_t _nss_files_setent();
extern nss_status_t _nss_files_endent();
extern nss_status_t _nss_files_getent_rigid();
extern nss_status_t _nss_files_getent_netdb();
extern nss_status_t _nss_files_do_all();
extern nss_status_t _nss_files_XY_all();
extern nss_status_t _nss_files_XY_hash();
#endif

#ifdef  __cplusplus
}
#endif

#endif /* _FILES_COMMON_H */