tdel.c revision 1573 
1/*-
2 * Copyright (c) 1991, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Margo Seltzer.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char copyright[] =
39"@(#) Copyright (c) 1991, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44static char sccsid[] = "@(#)tdel.c	8.1 (Berkeley) 6/4/93";
45#endif /* not lint */
46
47#include <sys/types.h>
48#include <sys/file.h>
49#include <db.h>
50#include <stdio.h>
51
52#define INITIAL	25000
53#define MAXWORDS    25000	       /* # of elements in search table */
54
55/* Usage: thash pagesize fillfactor file */
56char	wp1[8192];
57char	wp2[8192];
58main(argc, argv)
59char **argv;
60{
61	DBT item, key;
62	DB	*dbp;
63	HASHINFO ctl;
64	FILE *fp;
65	int	stat;
66
67	int i = 0;
68
69	argv++;
70	ctl.nelem = INITIAL;
71	ctl.hash = NULL;
72	ctl.bsize = atoi(*argv++);
73	ctl.ffactor = atoi(*argv++);
74	ctl.cachesize = 1024 * 1024;	/* 1 MEG */
75	ctl.lorder = 0;
76	argc -= 2;
77	if (!(dbp = dbopen( NULL, O_CREAT|O_RDWR, 0400, DB_HASH, &ctl))) {
78		/* create table */
79		fprintf(stderr, "cannot create: hash table size %d)\n",
80			INITIAL);
81		exit(1);
82	}
83
84	key.data = wp1;
85	item.data = wp2;
86	while ( fgets(wp1, 8192, stdin) &&
87		fgets(wp2, 8192, stdin) &&
88		i++ < MAXWORDS) {
89/*
90* put info in structure, and structure in the item
91*/
92		key.size = strlen(wp1);
93		item.size = strlen(wp2);
94
95/*
96 * enter key/data pair into the table
97 */
98		if ((dbp->put)(dbp, &key, &item, R_NOOVERWRITE) != NULL) {
99			fprintf(stderr, "cannot enter: key %s\n",
100				item.data);
101			exit(1);
102		}
103	}
104
105	if ( --argc ) {
106		fp = fopen ( argv[0], "r");
107		i = 0;
108		while ( fgets(wp1, 8192, fp) &&
109			fgets(wp2, 8192, fp) &&
110			i++ < MAXWORDS) {
111		    key.size = strlen(wp1);
112		    stat = (dbp->del)(dbp, &key, 0);
113		    if (stat) {
114			fprintf ( stderr, "Error retrieving %s\n", key.data );
115			exit(1);
116		    }
117		}
118		fclose(fp);
119	}
120	(dbp->close)(dbp);
121	exit(0);
122}
123