1 /* $NetBSD: rpc.yppasswdd.c,v 1.18 2017/05/04 16:26:09 sevan Exp $ */
2
3 /*
4 * Copyright (c) 1994 Mats O Jansson <moj@stacken.kth.se>
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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
17 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #ifndef lint
31 __RCSID("$NetBSD: rpc.yppasswdd.c,v 1.18 2017/05/04 16:26:09 sevan Exp $");
32 #endif /* not lint */
33
34 #include <sys/types.h>
35 #include <sys/wait.h>
36
37 #include <err.h>
38 #include <errno.h>
39 #include <limits.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <signal.h>
44 #include <unistd.h>
45 #include <util.h>
46
47 #include <rpc/rpc.h>
48 #include <rpc/pmap_clnt.h>
49 #include <rpcsvc/yppasswd.h>
50
51 #include "extern.h"
52
53 int noshell, nogecos, nopw;
54 char make_arg[_POSIX2_LINE_MAX] = "make";
55
56 void yppasswddprog_1(struct svc_req *, SVCXPRT *);
57 __dead static void usage(void);
58
59 int
main(int argc,char * argv[])60 main(int argc, char *argv[])
61 {
62 SVCXPRT *transp;
63 int i;
64 char *arg;
65 int maxrec = RPC_MAXDATASIZE;
66
67 for (i = 1; i < argc; i++) {
68 arg = argv[i];
69 if (*arg++ != '-')
70 usage();
71 if (strcmp("d", arg) == 0)
72 if (++i == argc)
73 usage();
74 else {
75 if (pw_setprefix(argv[i]) < 0)
76 err(EXIT_FAILURE,NULL);
77 }
78 else if (strcmp("noshell", arg) == 0)
79 noshell = 1;
80 else if (strcmp("nogecos", arg) == 0)
81 nogecos = 1;
82 else if (strcmp("nopw", arg) == 0)
83 nopw = 1;
84 else if (strcmp("m", arg) == 0) {
85 int len;
86
87 len = strlen(make_arg);
88 if (++i == argc)
89 usage();
90 for (; i < argc; i++) {
91 int arglen;
92
93 arglen = strlen(argv[i]);
94 if ((len + arglen) > (int)(sizeof(make_arg) - 2))
95 errx(EXIT_FAILURE, "%s", strerror(E2BIG));
96 make_arg[len++] = ' ';
97 (void)strcpy(&make_arg[len], argv[i]);
98 len += arglen;
99 }
100 } else
101 usage();
102 }
103
104 if (daemon(0, 0))
105 err(EXIT_FAILURE, "can't detach");
106 pidfile(NULL);
107
108 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
109
110 (void)pmap_unset(YPPASSWDPROG, YPPASSWDVERS);
111
112 transp = svcudp_create(RPC_ANYSOCK);
113 if (transp == NULL)
114 errx(EXIT_FAILURE, "cannot create UDP service");
115
116 if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
117 IPPROTO_UDP))
118 errx(EXIT_FAILURE,
119 "unable to register YPPASSWDPROG/YPPASSWDVERS/UDP");
120
121 transp = svctcp_create(RPC_ANYSOCK, RPC_MAXDATASIZE, RPC_MAXDATASIZE);
122 if (transp == NULL)
123 errx(EXIT_FAILURE, "cannot create TCP service");
124
125 if (!svc_register(transp, YPPASSWDPROG, YPPASSWDVERS, yppasswddprog_1,
126 IPPROTO_TCP))
127 errx(EXIT_FAILURE,
128 "unable to register YPPASSWDPROG/YPPASSWDVERS/TCP");
129
130 svc_run();
131 errx(EXIT_FAILURE, "svc_run returned");
132 /* NOTREACHED */
133 }
134
135 void
yppasswddprog_1(struct svc_req * rqstp,SVCXPRT * transp)136 yppasswddprog_1(struct svc_req *rqstp, SVCXPRT *transp)
137 {
138 union {
139 yppasswd yppasswdproc_update_1_arg;
140 } argument;
141
142 switch (rqstp->rq_proc) {
143 case NULLPROC:
144 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
145 return;
146
147 case YPPASSWDPROC_UPDATE:
148 /*
149 * We'd like this to look like a regular RPC
150 * stub, but we have to send the reply in the
151 * handler in order to avoid both signal race
152 * conditions locally and timeouts on the
153 * client.
154 */
155 (void)memset(&argument, 0, sizeof(argument));
156 if (!svc_getargs(transp, xdr_yppasswd, (caddr_t) & argument)) {
157 svcerr_decode(transp);
158 return;
159 }
160 make_passwd((yppasswd *)&argument, rqstp, transp);
161 if (!svc_freeargs(transp, xdr_yppasswd, (caddr_t) &argument))
162 errx(EXIT_FAILURE, "unable to free arguments");
163 return;
164 }
165
166 svcerr_noproc(transp);
167 }
168
169 void
usage(void)170 usage(void)
171 {
172
173 fprintf(stderr, "usage: %s [-d directory] [-noshell] [-nogecos] "
174 "[-nopw] [-m arg1 [arg2 ...]]\n", getprogname());
175 exit(EXIT_FAILURE);
176 }
177