2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1995, 1996
5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
35 #include <sys/cdefs.h>
36 #include <sys/param.h>
37 #include <sys/ioctl.h>
39 #include <sys/socket.h>
41 #include <sys/resource.h>
42 #include <netinet/in.h>
50 #include <stdlib.h> /* getenv, exit */
51 #include <string.h> /* strcmp */
56 #include <rpc/rpc_com.h>
57 #include <rpc/pmap_clnt.h> /* for pmap_unset */
58 #include <rpcsvc/yp.h>
59 #include <rpcsvc/ypclnt.h>
62 #include "yppasswdd_extern.h"
63 #include "yppasswd_private.h"
64 #include "ypxfr_extern.h"
65 #include "yp_extern.h"
68 #define SIG_PF void(*)(int)
75 #define _RPCSVC_CLOSEDOWN 120
76 int _rpcpmstart = 0; /* Started by a port monitor ? */
77 static int _rpcfdtype;
78 /* Whether Stream or Datagram ? */
79 /* States a server can be in wrt request */
86 static char _localhost[] = "localhost";
87 static char _passwd_byname[] = "passwd.byname";
88 extern int _rpcsvcstate; /* Set when a request is serviced */
89 static char _progname[] = "rpc.yppasswdd";
90 char *progname = _progname;
91 static char _yp_dir[] = _PATH_YP;
92 char *yp_dir = _yp_dir;
93 static char _passfile_default[] = _PATH_YP "master.passwd";
94 char *passfile_default = _passfile_default;
96 char *yppasswd_domain = NULL;
99 int allow_additions = 0;
104 char sockname[] = YP_SOCKNAME;
107 terminate(int sig __unused)
109 rpcb_unset(YPPASSWDPROG, YPPASSWDVERS, NULL);
110 rpcb_unset(MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS, NULL);
116 reload(int sig __unused)
122 closedown(int sig __unused)
124 if (_rpcsvcstate == _IDLE) {
125 extern fd_set svc_fdset;
129 if (_rpcfdtype == SOCK_DGRAM) {
134 size = getdtablesize();
136 for (i = 0, openfd = 0; i < size && openfd < 2; i++)
137 if (FD_ISSET(i, &svc_fdset))
144 if (_rpcsvcstate == _SERVED)
145 _rpcsvcstate = _IDLE;
147 (void) signal(SIGALRM, (SIG_PF) closedown);
148 (void) alarm(_RPCSVC_CLOSEDOWN/2);
154 fprintf(stderr, "%s\n%s\n",
155 "usage: rpc.yppasswdd [-t master.passwd file] [-d domain] [-p path] [-s]",
156 " [-f] [-m] [-i] [-a] [-v] [-u] [-h]");
161 main(int argc, char *argv[])
164 SVCXPRT *transp = NULL;
165 struct sockaddr_in saddr;
166 socklen_t asize = sizeof (saddr);
167 struct netconfig *nconf;
172 char myname[MAXHOSTNAMELEN + 2];
173 int maxrec = RPC_MAXDATASIZE;
177 while ((ch = getopt(argc, argv, "t:d:p:sfamuivh")) != -1) {
180 passfile_default = optarg;
183 yppasswd_domain = optarg;
216 if (yppasswd_domain == NULL) {
217 if (yp_get_default_domain(&yppasswd_domain)) {
218 yp_error("no domain specified and system domain \
219 name isn't set -- aborting");
226 if (getrpcport(_localhost, YPPROG, YPVERS, IPPROTO_UDP) <= 0) {
227 yp_error("no ypserv processes registered with local portmap");
228 yp_error("this host is not an NIS server -- aborting");
232 if ((mastername = ypxfr_get_master(yppasswd_domain,
233 _passwd_byname, _localhost, 0)) == NULL) {
234 yp_error("can't get name of NIS master server for domain %s",
239 if (gethostname((char *)&myname, sizeof(myname)) == -1) {
240 yp_error("can't get local hostname: %s", strerror(errno));
244 if (strncasecmp(mastername, (char *)&myname, sizeof(myname))) {
245 yp_error("master of %s is %s, but we are %s",
246 "passwd.byname", mastername, myname);
247 yp_error("this host is not the NIS master server for \
248 the %s domain -- aborting", yppasswd_domain);
254 if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
255 socklen_t ssize = sizeof (int);
256 if (saddr.sin_family != AF_INET)
258 if (getsockopt(0, SOL_SOCKET, SO_TYPE,
259 (char *)&_rpcfdtype, &ssize) == -1)
264 if (!debug && _rpcpmstart == 0) {
266 err(1,"cannot fork");
269 openlog("rpc.yppasswdd", LOG_PID, LOG_DAEMON);
270 memset(&sa, 0, sizeof(sa));
271 sa.sa_flags = SA_NOCLDWAIT;
272 sigaction(SIGCHLD, &sa, NULL);
274 rpcb_unset(YPPASSWDPROG, YPPASSWDVERS, NULL);
275 rpcb_unset(MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS, NULL);
277 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
279 if (svc_create(yppasswdprog_1, YPPASSWDPROG, YPPASSWDVERS, "netpath") == 0) {
280 yp_error("cannot create yppasswd service.");
283 if (svc_create(master_yppasswdprog_1, MASTER_YPPASSWDPROG,
284 MASTER_YPPASSWDVERS, "netpath") == 0) {
285 yp_error("cannot create master_yppasswd service.");
290 localhandle = setnetconfig();
291 while ((nconf = getnetconfig(localhandle)) != NULL) {
292 if (nconf->nc_protofmly != NULL &&
293 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
297 yp_error("getnetconfigent unix: %s", nc_sperror());
301 transp = svcunix_create(RPC_ANYSOCK, 0, 0, sockname);
302 if (transp == NULL) {
303 yp_error("cannot create AF_LOCAL service.");
306 if (!svc_reg(transp, MASTER_YPPASSWDPROG, MASTER_YPPASSWDVERS,
307 master_yppasswdprog_1, nconf)) {
308 yp_error("unable to register (MASTER_YPPASSWDPROG, \
309 MASTER_YPPASSWDVERS, unix).");
312 endnetconfig(localhandle);
314 /* Only root may connect() to the AF_UNIX link. */
315 if (chmod(sockname, 0))
316 err(1, "chmod of %s failed", sockname);
318 if (transp == (SVCXPRT *)NULL) {
319 yp_error("could not create a handle");
323 (void) signal(SIGALRM, (SIG_PF) closedown);
324 (void) alarm(_RPCSVC_CLOSEDOWN/2);
327 /* Unlimited resource limits. */
328 rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
329 (void)setrlimit(RLIMIT_CPU, &rlim);
330 (void)setrlimit(RLIMIT_FSIZE, &rlim);
331 (void)setrlimit(RLIMIT_STACK, &rlim);
332 (void)setrlimit(RLIMIT_DATA, &rlim);
333 (void)setrlimit(RLIMIT_RSS, &rlim);
335 /* Don't drop core (not really necessary, but GP's). */
336 rlim.rlim_cur = rlim.rlim_max = 0;
337 (void)setrlimit(RLIMIT_CORE, &rlim);
339 /* Turn off signals. */
340 (void)signal(SIGALRM, SIG_IGN);
341 (void)signal(SIGHUP, (SIG_PF) reload);
342 (void)signal(SIGINT, SIG_IGN);
343 (void)signal(SIGPIPE, SIG_IGN);
344 (void)signal(SIGQUIT, SIG_IGN);
345 (void)signal(SIGTERM, (SIG_PF) terminate);
348 yp_error("svc_run returned");