1  | 
     | 
     | 
    /*	$OpenBSD: ypdb.c,v 1.12 2015/01/16 06:40:22 deraadt Exp $ */  | 
    
    
    2  | 
     | 
     | 
     | 
    
    
    3  | 
     | 
     | 
    /*  | 
    
    
    4  | 
     | 
     | 
     * Copyright (c) 1990, 1993  | 
    
    
    5  | 
     | 
     | 
     *	The Regents of the University of California.  All rights reserved.  | 
    
    
    6  | 
     | 
     | 
     * All rights reserved.  | 
    
    
    7  | 
     | 
     | 
     *  | 
    
    
    8  | 
     | 
     | 
     * This code is derived from software contributed to Berkeley by  | 
    
    
    9  | 
     | 
     | 
     * Margo Seltzer.  | 
    
    
    10  | 
     | 
     | 
     *  | 
    
    
    11  | 
     | 
     | 
     * This code is derived from ndbm module of BSD4.4 db (hash) by  | 
    
    
    12  | 
     | 
     | 
     * Mats O Jansson  | 
    
    
    13  | 
     | 
     | 
     *  | 
    
    
    14  | 
     | 
     | 
     * Redistribution and use in source and binary forms, with or without  | 
    
    
    15  | 
     | 
     | 
     * modification, are permitted provided that the following conditions  | 
    
    
    16  | 
     | 
     | 
     * are met:  | 
    
    
    17  | 
     | 
     | 
     * 1. Redistributions of source code must retain the above copyright  | 
    
    
    18  | 
     | 
     | 
     *    notice, this list of conditions and the following disclaimer.  | 
    
    
    19  | 
     | 
     | 
     * 2. Redistributions in binary form must reproduce the above copyright  | 
    
    
    20  | 
     | 
     | 
     *    notice, this list of conditions and the following disclaimer in the  | 
    
    
    21  | 
     | 
     | 
     *    documentation and/or other materials provided with the distribution.  | 
    
    
    22  | 
     | 
     | 
     * 3. Neither the name of the University nor the names of its contributors  | 
    
    
    23  | 
     | 
     | 
     *    may be used to endorse or promote products derived from this software  | 
    
    
    24  | 
     | 
     | 
     *    without specific prior written permission.  | 
    
    
    25  | 
     | 
     | 
     *  | 
    
    
    26  | 
     | 
     | 
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS  | 
    
    
    27  | 
     | 
     | 
     * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED  | 
    
    
    28  | 
     | 
     | 
     * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE  | 
    
    
    29  | 
     | 
     | 
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY  | 
    
    
    30  | 
     | 
     | 
     * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL  | 
    
    
    31  | 
     | 
     | 
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS  | 
    
    
    32  | 
     | 
     | 
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)  | 
    
    
    33  | 
     | 
     | 
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT  | 
    
    
    34  | 
     | 
     | 
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY  | 
    
    
    35  | 
     | 
     | 
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF  | 
    
    
    36  | 
     | 
     | 
     * SUCH DAMAGE.  | 
    
    
    37  | 
     | 
     | 
     */  | 
    
    
    38  | 
     | 
     | 
     | 
    
    
    39  | 
     | 
     | 
    #include <sys/types.h>  | 
    
    
    40  | 
     | 
     | 
    #include <stdio.h>  | 
    
    
    41  | 
     | 
     | 
    #include <string.h>  | 
    
    
    42  | 
     | 
     | 
     | 
    
    
    43  | 
     | 
     | 
    #include <rpcsvc/yp.h>  | 
    
    
    44  | 
     | 
     | 
     | 
    
    
    45  | 
     | 
     | 
    #include "ypdb.h"  | 
    
    
    46  | 
     | 
     | 
     | 
    
    
    47  | 
     | 
     | 
    /*  | 
    
    
    48  | 
     | 
     | 
     * Returns:  | 
    
    
    49  | 
     | 
     | 
     *	*DBM on success  | 
    
    
    50  | 
     | 
     | 
     *	NULL on failure  | 
    
    
    51  | 
     | 
     | 
     */  | 
    
    
    52  | 
     | 
     | 
    extern DBM *  | 
    
    
    53  | 
     | 
     | 
    ypdb_open(const char *file, int flags, int mode)  | 
    
    
    54  | 
     | 
     | 
    { | 
    
    
    55  | 
     | 
     | 
    	BTREEINFO info;  | 
    
    
    56  | 
     | 
     | 
    	char path[PATH_MAX];  | 
    
    
    57  | 
     | 
     | 
    	DBM *db;  | 
    
    
    58  | 
     | 
     | 
     | 
    
    
    59  | 
     | 
     | 
    	memset(&info, 0, sizeof info);  | 
    
    
    60  | 
     | 
     | 
    	info.flags = 0;  | 
    
    
    61  | 
     | 
     | 
    	info.cachesize = 0;  | 
    
    
    62  | 
     | 
     | 
    	info.maxkeypage = 0;  | 
    
    
    63  | 
     | 
     | 
    	info.minkeypage = 0;  | 
    
    
    64  | 
     | 
     | 
    	info.psize = 0;  | 
    
    
    65  | 
     | 
     | 
    	info.compare = NULL;  | 
    
    
    66  | 
     | 
     | 
    	info.prefix = NULL;  | 
    
    
    67  | 
     | 
     | 
    	info.lorder = 0;  | 
    
    
    68  | 
     | 
     | 
    	snprintf(path, sizeof(path), "%s%s", file, YPDB_SUFFIX);  | 
    
    
    69  | 
     | 
     | 
    	db = (DBM *)dbopen(path, flags, mode, DB_BTREE, (void *)&info);  | 
    
    
    70  | 
     | 
     | 
    	return (db);  | 
    
    
    71  | 
     | 
     | 
    }  | 
    
    
    72  | 
     | 
     | 
     | 
    
    
    73  | 
     | 
     | 
    /*  | 
    
    
    74  | 
     | 
     | 
     * Returns:  | 
    
    
    75  | 
     | 
     | 
     *	*DBM on success  | 
    
    
    76  | 
     | 
     | 
     *	NULL on failure  | 
    
    
    77  | 
     | 
     | 
     */  | 
    
    
    78  | 
     | 
     | 
    extern DBM *  | 
    
    
    79  | 
     | 
     | 
    ypdb_open_suf(const char *file, int flags, int mode)  | 
    
    
    80  | 
     | 
     | 
    { | 
    
    
    81  | 
     | 
     | 
    	BTREEINFO info;  | 
    
    
    82  | 
     | 
     | 
    	DBM *db;  | 
    
    
    83  | 
     | 
     | 
     | 
    
    
    84  | 
     | 
     | 
    	memset(&info, 0, sizeof info);  | 
    
    
    85  | 
     | 
     | 
    	info.flags = 0;  | 
    
    
    86  | 
     | 
     | 
    	info.cachesize = 0;  | 
    
    
    87  | 
     | 
     | 
    	info.maxkeypage = 0;  | 
    
    
    88  | 
     | 
     | 
    	info.minkeypage = 0;  | 
    
    
    89  | 
     | 
     | 
    	info.psize = 0;  | 
    
    
    90  | 
     | 
     | 
    	info.compare = NULL;  | 
    
    
    91  | 
     | 
     | 
    	info.prefix = NULL;  | 
    
    
    92  | 
     | 
     | 
    	info.lorder = 0;  | 
    
    
    93  | 
     | 
     | 
    	db = (DBM *)dbopen(file, flags, mode, DB_BTREE, (void *)&info);  | 
    
    
    94  | 
     | 
     | 
    	return (db);  | 
    
    
    95  | 
     | 
     | 
    }  | 
    
    
    96  | 
     | 
     | 
     | 
    
    
    97  | 
     | 
     | 
    extern void  | 
    
    
    98  | 
     | 
     | 
    ypdb_close(DBM *db)  | 
    
    
    99  | 
     | 
     | 
    { | 
    
    
    100  | 
     | 
     | 
    	(void)(db->close)(db);  | 
    
    
    101  | 
     | 
     | 
    }  | 
    
    
    102  | 
     | 
     | 
     | 
    
    
    103  | 
     | 
     | 
    /*  | 
    
    
    104  | 
     | 
     | 
     * Returns:  | 
    
    
    105  | 
     | 
     | 
     *	DATUM on success  | 
    
    
    106  | 
     | 
     | 
     *	NULL on failure  | 
    
    
    107  | 
     | 
     | 
     */  | 
    
    
    108  | 
     | 
     | 
    extern datum  | 
    
    
    109  | 
     | 
     | 
    ypdb_fetch(DBM *db, datum key)  | 
    
    
    110  | 
     | 
     | 
    { | 
    
    
    111  | 
     | 
     | 
    	datum retval;  | 
    
    
    112  | 
     | 
     | 
    	DBT nk, nd;  | 
    
    
    113  | 
     | 
     | 
    	int status;  | 
    
    
    114  | 
     | 
     | 
     | 
    
    
    115  | 
     | 
     | 
    	nk.data = key.dptr;  | 
    
    
    116  | 
     | 
     | 
    	nk.size = key.dsize;  | 
    
    
    117  | 
     | 
     | 
     | 
    
    
    118  | 
     | 
     | 
    	status = (db->get)(db, &nk, &nd, 0);  | 
    
    
    119  | 
     | 
     | 
    	if (status) { | 
    
    
    120  | 
     | 
     | 
    		retval.dptr = NULL;  | 
    
    
    121  | 
     | 
     | 
    		retval.dsize = 0;  | 
    
    
    122  | 
     | 
     | 
    	} else { | 
    
    
    123  | 
     | 
     | 
    		retval.dptr = nd.data;  | 
    
    
    124  | 
     | 
     | 
    		retval.dsize = nd.size;  | 
    
    
    125  | 
     | 
     | 
    	}  | 
    
    
    126  | 
     | 
     | 
    	return (retval);  | 
    
    
    127  | 
     | 
     | 
    }  | 
    
    
    128  | 
     | 
     | 
     | 
    
    
    129  | 
     | 
     | 
    /*  | 
    
    
    130  | 
     | 
     | 
     * Returns:  | 
    
    
    131  | 
     | 
     | 
     *	DATUM on success  | 
    
    
    132  | 
     | 
     | 
     *	NULL on failure  | 
    
    
    133  | 
     | 
     | 
     */  | 
    
    
    134  | 
     | 
     | 
     | 
    
    
    135  | 
     | 
     | 
    extern datum  | 
    
    
    136  | 
     | 
     | 
    ypdb_firstkey(DBM *db)  | 
    
    
    137  | 
     | 
     | 
    { | 
    
    
    138  | 
     | 
     | 
    	int status;  | 
    
    
    139  | 
     | 
     | 
    	datum retkey;  | 
    
    
    140  | 
     | 
     | 
    	DBT nk, nd;  | 
    
    
    141  | 
     | 
     | 
     | 
    
    
    142  | 
     | 
     | 
    	status = (db->seq)(db, &nk, &nd, R_FIRST);  | 
    
    
    143  | 
     | 
     | 
    	if (status) { | 
    
    
    144  | 
     | 
     | 
    		retkey.dptr = NULL;  | 
    
    
    145  | 
     | 
     | 
    		retkey.dsize = 0;  | 
    
    
    146  | 
     | 
     | 
    	} else { | 
    
    
    147  | 
     | 
     | 
    		retkey.dptr = nk.data;  | 
    
    
    148  | 
     | 
     | 
    		retkey.dsize = nk.size;  | 
    
    
    149  | 
     | 
     | 
    	}  | 
    
    
    150  | 
     | 
     | 
    	return (retkey);  | 
    
    
    151  | 
     | 
     | 
    }  | 
    
    
    152  | 
     | 
     | 
     | 
    
    
    153  | 
     | 
     | 
    /*  | 
    
    
    154  | 
     | 
     | 
     * Returns:  | 
    
    
    155  | 
     | 
     | 
     *	DATUM on success  | 
    
    
    156  | 
     | 
     | 
     *	NULL on failure  | 
    
    
    157  | 
     | 
     | 
     */  | 
    
    
    158  | 
     | 
     | 
     | 
    
    
    159  | 
     | 
     | 
    extern datum  | 
    
    
    160  | 
     | 
     | 
    ypdb_nextkey(DBM *db)  | 
    
    
    161  | 
     | 
     | 
    { | 
    
    
    162  | 
     | 
     | 
    	int status;  | 
    
    
    163  | 
     | 
     | 
    	datum retkey;  | 
    
    
    164  | 
     | 
     | 
    	DBT nk, nd;  | 
    
    
    165  | 
     | 
     | 
     | 
    
    
    166  | 
     | 
     | 
    	status = (db->seq)(db, &nk, &nd, R_NEXT);  | 
    
    
    167  | 
     | 
     | 
    	if (status) { | 
    
    
    168  | 
     | 
     | 
    		retkey.dptr = NULL;  | 
    
    
    169  | 
     | 
     | 
    		retkey.dsize = 0;  | 
    
    
    170  | 
     | 
     | 
    	} else { | 
    
    
    171  | 
     | 
     | 
    		retkey.dptr = nk.data;  | 
    
    
    172  | 
     | 
     | 
    		retkey.dsize = nk.size;  | 
    
    
    173  | 
     | 
     | 
    	}  | 
    
    
    174  | 
     | 
     | 
    	return (retkey);  | 
    
    
    175  | 
     | 
     | 
    }  | 
    
    
    176  | 
     | 
     | 
     | 
    
    
    177  | 
     | 
     | 
    /*  | 
    
    
    178  | 
     | 
     | 
     * Returns:  | 
    
    
    179  | 
     | 
     | 
     *	DATUM on success  | 
    
    
    180  | 
     | 
     | 
     *	NULL on failure  | 
    
    
    181  | 
     | 
     | 
     */  | 
    
    
    182  | 
     | 
     | 
     | 
    
    
    183  | 
     | 
     | 
    extern datum  | 
    
    
    184  | 
     | 
     | 
    ypdb_setkey(DBM *db, datum key)  | 
    
    
    185  | 
     | 
     | 
    { | 
    
    
    186  | 
     | 
     | 
    	int status;  | 
    
    
    187  | 
     | 
     | 
    	DBT nk, nd;  | 
    
    
    188  | 
     | 
     | 
     | 
    
    
    189  | 
     | 
     | 
    	nk.data = key.dptr;  | 
    
    
    190  | 
     | 
     | 
    	nk.size = key.dsize;  | 
    
    
    191  | 
     | 
     | 
    	status = (db->seq)(db, &nk, &nd, R_CURSOR);  | 
    
    
    192  | 
     | 
     | 
    	if (status) { | 
    
    
    193  | 
     | 
     | 
    		key.dptr = NULL;  | 
    
    
    194  | 
     | 
     | 
    		key.dsize = 0;  | 
    
    
    195  | 
     | 
     | 
    	}  | 
    
    
    196  | 
     | 
     | 
    	return (key);  | 
    
    
    197  | 
     | 
     | 
    }  | 
    
    
    198  | 
     | 
     | 
     | 
    
    
    199  | 
     | 
     | 
    /*  | 
    
    
    200  | 
     | 
     | 
     * Returns:  | 
    
    
    201  | 
     | 
     | 
     *	 0 on success  | 
    
    
    202  | 
     | 
     | 
     *	<0 failure  | 
    
    
    203  | 
     | 
     | 
     *	 1 if YPDB_INSERT and entry exists  | 
    
    
    204  | 
     | 
     | 
     */  | 
    
    
    205  | 
     | 
     | 
    int  | 
    
    
    206  | 
     | 
     | 
    ypdb_store(DBM *db, datum key, datum content, int flags)  | 
    
    
    207  | 
     | 
     | 
    { | 
    
    
    208  | 
     | 
     | 
    	DBT nk, nd;  | 
    
    
    209  | 
     | 
     | 
     | 
    
    
    210  | 
     | 
     | 
    	if (key.dsize > YPMAXRECORD || content.dsize > YPMAXRECORD)  | 
    
    
    211  | 
     | 
     | 
    		return -1;  | 
    
    
    212  | 
     | 
     | 
    	nk.data = key.dptr;  | 
    
    
    213  | 
     | 
     | 
    	nk.size = key.dsize;  | 
    
    
    214  | 
     | 
     | 
    	nd.data = content.dptr;  | 
    
    
    215  | 
     | 
     | 
    	nd.size = content.dsize;  | 
    
    
    216  | 
     | 
     | 
    	return ((db->put)(db, &nk, &nd,  | 
    
    
    217  | 
     | 
     | 
    	    (flags == YPDB_INSERT) ? R_NOOVERWRITE : 0));  | 
    
    
    218  | 
     | 
     | 
    }  |