1 /* $NetBSD: pw_yp.c,v 1.23 2015/06/17 00:01:59 christos Exp $ */
2
3 /*
4 * Copyright (c) 1988 The Regents of the University of California.
5 * 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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 #ifndef lint
33 #if 0
34 static char sccsid[] = "@(#)pw_yp.c 1.0 2/2/93";
35 #else
36 __RCSID("$NetBSD: pw_yp.c,v 1.23 2015/06/17 00:01:59 christos Exp $");
37 #endif
38 #endif /* not lint */
39
40 #ifdef YP
41
42 #include <err.h>
43 #include <errno.h>
44 #include <netdb.h>
45 #include <pwd.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <time.h>
50 #include <unistd.h>
51
52 #include <rpc/rpc.h>
53 #include <rpcsvc/yp_prot.h>
54 #include <rpcsvc/ypclnt.h>
55
56 #define passwd yp_passwd_rec
57 #include <rpcsvc/yppasswd.h>
58 #undef passwd
59
60 #include "chpass.h"
61
62 static char *domain;
63
64 /*
65 * Check if rpc.yppasswdd is running on the master YP server.
66 * XXX this duplicates some code, but is much less complex
67 * than the alternative.
68 */
69 int
check_yppasswdd(void)70 check_yppasswdd(void)
71 {
72 char *master;
73 int rpcport;
74
75 /*
76 * Get local domain
77 */
78 if (!domain && yp_get_default_domain(&domain) != 0)
79 return (1);
80
81 /*
82 * Find the host for the passwd map; it should be running
83 * the daemon.
84 */
85 master = NULL;
86 if (yp_master(domain, "passwd.byname", &master) != 0) {
87 if (master != NULL)
88 free (master);
89 return (1);
90 }
91
92 /*
93 * Ask the portmapper for the port of the daemon.
94 */
95 if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
96 IPPROTO_UDP)) == 0)
97 return (1);
98
99 /*
100 * Successful contact with rpc.yppasswdd.
101 */
102 return (0);
103 }
104
105 int
pw_yp(struct passwd * pw,uid_t ypuid)106 pw_yp(struct passwd *pw, uid_t ypuid)
107 {
108 char *master;
109 int r, rpcport, status;
110 struct yppasswd yppw;
111 struct timeval tv;
112 CLIENT *client;
113
114 /*
115 * Get local domain
116 */
117 if (!domain && (r = yp_get_default_domain(&domain)))
118 errx(1, "can't get local YP domain. Reason: %s",
119 yperr_string(r));
120
121 /*
122 * Find the host for the passwd map; it should be running
123 * the daemon.
124 */
125 master = NULL;
126 if ((r = yp_master(domain, "passwd.byname", &master)) != 0) {
127 if (master)
128 free (master);
129 warnx("can't find the master YP server. Reason: %s",
130 yperr_string(r));
131 return (1);
132 }
133
134 /*
135 * Ask the portmapper for the port of the daemon.
136 */
137 if ((rpcport = getrpcport(master, YPPASSWDPROG, YPPASSWDPROC_UPDATE,
138 IPPROTO_UDP)) == 0) {
139 warnx("master YP server not running yppasswd daemon.\n\t%s",
140 "Can't change password.");
141 return (1);
142 }
143
144 /*
145 * Be sure the port is privileged
146 */
147 if (rpcport >= IPPORT_RESERVED) {
148 warnx("yppasswd daemon is on an invalid port.");
149 return (1);
150 }
151
152 /* prompt for old password */
153 memset(&yppw, 0, sizeof yppw);
154 yppw.oldpass = getpass("Old password:");
155 if (!yppw.oldpass) {
156 warnx("Cancelled.");
157 return (1);
158 }
159
160 /* tell rpc.yppasswdd */
161 yppw.newpw.pw_name = strdup(pw->pw_name);
162 if (!yppw.newpw.pw_name) {
163 err(1, "strdup");
164 /*NOTREACHED*/
165 }
166 yppw.newpw.pw_passwd = strdup(pw->pw_passwd);
167 if (!yppw.newpw.pw_passwd) {
168 err(1, "strdup");
169 /*NOTREACHED*/
170 }
171 yppw.newpw.pw_uid = pw->pw_uid;
172 yppw.newpw.pw_gid = pw->pw_gid;
173 yppw.newpw.pw_gecos = strdup(pw->pw_gecos);
174 if (!yppw.newpw.pw_gecos) {
175 err(1, "strdup");
176 /*NOTREACHED*/
177 }
178 yppw.newpw.pw_dir = strdup(pw->pw_dir);
179 if (!yppw.newpw.pw_dir) {
180 err(1, "strdup");
181 /*NOTREACHED*/
182 }
183 yppw.newpw.pw_shell = strdup(pw->pw_shell);
184 if (!yppw.newpw.pw_shell) {
185 err(1, "strdup");
186 /*NOTREACHED*/
187 }
188
189 client = clnt_create(master, YPPASSWDPROG, YPPASSWDVERS, "udp");
190 if (client == NULL) {
191 warnx("cannot contact yppasswdd on %s: Reason: %s",
192 master, yperr_string(YPERR_YPBIND));
193 return (1);
194 }
195 client->cl_auth = authunix_create_default();
196 tv.tv_sec = 5;
197 tv.tv_usec = 0;
198 r = clnt_call(client, YPPASSWDPROC_UPDATE,
199 xdr_yppasswd, &yppw, xdr_int, &status, tv);
200 if (r) {
201 warnx("rpc to yppasswdd failed.");
202 return (1);
203 } else if (status)
204 printf("Couldn't change YP password.\n");
205 else
206 printf("%s %s, %s\n",
207 "The YP password information has been changed on",
208 master, "the master YP passwd server.");
209 return (0);
210 }
211
212 void
yppw_error(const char * name,int yperr,int eval)213 yppw_error(const char *name, int yperr, int eval)
214 {
215
216 if (yperr) {
217 if (name)
218 warn("%s", name);
219 else
220 warn(NULL);
221 }
222
223 errx(eval, "YP passwd information unchanged");
224 }
225
226 void
yppw_prompt(void)227 yppw_prompt(void)
228 {
229 int c;
230
231 (void)printf("re-edit the password file? [y]: ");
232 (void)fflush(stdout);
233 c = getchar();
234 if (c != EOF && c != '\n')
235 while (getchar() != '\n');
236 if (c == 'n')
237 yppw_error(NULL, 0, 0);
238 }
239 #endif /* YP */
240