yp_dbupdate.c revision 26237 
1/*
2 * Copyright (c) 1996
3 *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	$Id: yp_dbupdate.c,v 1.1 1996/12/26 06:00:13 wpaul Exp $
33 */
34
35#include <sys/fcntl.h>
36
37#include <stdio.h>
38#include <string.h>
39#include <errno.h>
40#include <limits.h>
41#include <db.h>
42#include <unistd.h>
43struct dom_binding {};
44#include <rpcsvc/ypclnt.h>
45#include <rpcsvc/ypupdate_prot.h>
46#include "ypxfr_extern.h"
47#include "ypupdated_extern.h"
48
49#ifndef lint
50static const char rcsid[] = "$Id: yp_dbupdate.c,v 1.1 1996/12/26 06:00:13 wpaul Exp $";
51#endif
52
53static int yp_domake(map, domain)
54	char *map;
55	char *domain;
56{
57	int pid;
58
59	switch((pid = fork())) {
60	case 0:
61		execlp(MAP_UPDATE_PATH, MAP_UPDATE, map, domain, NULL);
62		yp_error("couldn't exec map update process: %s",
63						strerror(errno));
64		exit(1);
65		break;
66	case -1:
67		yp_error("fork() failed: %s", strerror(errno));
68		return(YPERR_YPERR);
69		break;
70	default:
71		children++;
72		break;
73	}
74
75	return(0);
76}
77
78int ypmap_update(netname, map, op, keylen, keyval, datlen, datval)
79	char *netname;
80	char *map;
81	unsigned int op;
82	unsigned int keylen;
83	char *keyval;
84	unsigned int datlen;
85	char *datval;
86{
87	DB *dbp;
88	DBT key = { NULL, 0 }, data = { NULL, 0 };
89	char *yp_last = "YP_LAST_MODIFIED";
90	char yplastbuf[YPMAXRECORD];
91	char *domptr;
92	int rval = 0;
93
94	if ((domptr = strchr(netname, '@')) == NULL)
95		return(ERR_ACCESS);
96	domptr++;
97
98
99	dbp = yp_open_db_rw(domptr, map, O_RDWR);
100	if (dbp == NULL)
101		return(ERR_DBASE);
102
103	key.data = keyval;
104	key.size = keylen;
105	data.data = datval;
106	data.size = datlen;
107
108	switch(op) {
109	case YPOP_DELETE: /* delete this entry */
110		rval = yp_del_record(dbp, &key);
111		if (rval == YP_TRUE)
112			rval = 0;
113		break;
114	case YPOP_INSERT: /* add, do not change */
115		rval = yp_put_record(dbp, &key, &data, 0);
116		if (rval == YP_TRUE)
117			rval = 0;
118		break;
119	case YPOP_STORE: /* add, or change */
120		rval = yp_put_record(dbp, &key, &data, 1);
121		if (rval == YP_TRUE)
122			rval = 0;
123		break;
124	case YPOP_CHANGE: /* change, do not add */
125		if (yp_get_record(domptr, map, &key, &data, 0) != YP_TRUE) {
126			rval = ERR_KEY;
127			break;
128		}
129		rval = yp_put_record(dbp, &key, &data, 1);
130		if (rval == YP_TRUE)
131			rval = 0;
132		break;
133	default:
134		yp_error("unknown update command: (%d)", op);
135	}
136
137	if (rval) {
138		(void)(dbp->close)(dbp);
139		return(rval);
140	}
141
142	snprintf(yplastbuf, sizeof(yplastbuf), "%lu", time(NULL));
143	key.data = yp_last;
144	key.size = strlen(yp_last);
145	data.data = (char *)&yplastbuf;
146	data.size = strlen(yplastbuf);
147	if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
148		yp_error("failed to update timestamp in %s/%s", domptr, map);
149		(void)(dbp->close)(dbp);
150		return(ERR_DBASE);
151	}
152
153	(void)(dbp->close)(dbp);
154	return(yp_domake(map, domptr));
155}
156