xref: /freebsd/usr.sbin/rpc.ypupdated/yp_dbupdate.c (revision a64729f5077d77e13b9497cb33ecb3c82e606ee8)
1 /*-
2  * SPDX-License-Identifier: BSD-4-Clause
3  *
4  * Copyright (c) 1996
5  *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *	This product includes software developed by Bill Paul.
18  * 4. Neither the name of the author nor the names of any co-contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #include <sys/cdefs.h>
36 #include <sys/fcntl.h>
37 
38 #include <stdint.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <errno.h>
43 #include <limits.h>
44 #include <db.h>
45 #include <unistd.h>
46 #include <rpcsvc/ypclnt.h>
47 #include <rpcsvc/ypupdate_prot.h>
48 #include "ypxfr_extern.h"
49 #include "ypupdated_extern.h"
50 
51 static int
52 yp_domake(char *map, char *domain)
53 {
54 	int pid;
55 
56 	switch ((pid = fork())) {
57 	case 0:
58 		execlp(MAP_UPDATE_PATH, MAP_UPDATE, map, domain, (char *)NULL);
59 		yp_error("couldn't exec map update process: %s",
60 						strerror(errno));
61 		exit(1);
62 		break;
63 	case -1:
64 		yp_error("fork() failed: %s", strerror(errno));
65 		return(YPERR_YPERR);
66 		break;
67 	default:
68 		children++;
69 		break;
70 	}
71 
72 	return(0);
73 }
74 
75 int
76 ypmap_update(char *netname, char *map, unsigned int op, unsigned int keylen,
77     char *keyval, unsigned int datlen, char *datval)
78 {
79 	DB *dbp;
80 	DBT key = { NULL, 0 }, data = { NULL, 0 };
81 	char *yp_last = "YP_LAST_MODIFIED";
82 	char yplastbuf[32];
83 	char *domptr;
84 	int rval = 0;
85 
86 	if ((domptr = strchr(netname, '@')) == NULL)
87 		return(ERR_ACCESS);
88 	domptr++;
89 
90 
91 	dbp = yp_open_db_rw(domptr, map, O_RDWR);
92 	if (dbp == NULL)
93 		return(ERR_DBASE);
94 
95 	key.data = keyval;
96 	key.size = keylen;
97 	data.data = datval;
98 	data.size = datlen;
99 
100 	switch (op) {
101 	case YPOP_DELETE: /* delete this entry */
102 		rval = yp_del_record(dbp, &key);
103 		if (rval == YP_TRUE)
104 			rval = 0;
105 		break;
106 	case YPOP_INSERT: /* add, do not change */
107 		rval = yp_put_record(dbp, &key, &data, 0);
108 		if (rval == YP_TRUE)
109 			rval = 0;
110 		break;
111 	case YPOP_STORE: /* add, or change */
112 		rval = yp_put_record(dbp, &key, &data, 1);
113 		if (rval == YP_TRUE)
114 			rval = 0;
115 		break;
116 	case YPOP_CHANGE: /* change, do not add */
117 		if (yp_get_record(domptr, map, &key, &data, 0) != YP_TRUE) {
118 			rval = ERR_KEY;
119 			break;
120 		}
121 		rval = yp_put_record(dbp, &key, &data, 1);
122 		if (rval == YP_TRUE)
123 			rval = 0;
124 		break;
125 	default:
126 		yp_error("unknown update command: (%d)", op);
127 	}
128 
129 	if (rval) {
130 		(void)(dbp->close)(dbp);
131 		return(rval);
132 	}
133 
134 	snprintf(yplastbuf, sizeof(yplastbuf), "%jd", (intmax_t)time(NULL));
135 	key.data = yp_last;
136 	key.size = strlen(yp_last);
137 	data.data = (char *)&yplastbuf;
138 	data.size = strlen(yplastbuf);
139 	if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
140 		yp_error("failed to update timestamp in %s/%s", domptr, map);
141 		(void)(dbp->close)(dbp);
142 		return(ERR_DBASE);
143 	}
144 
145 	(void)(dbp->close)(dbp);
146 	return(yp_domake(map, domptr));
147 }
148