3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
34 static const char rcsid[] =
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/socket.h>
47 #include <netinet/in.h>
48 #include <arpa/inet.h>
51 #include <rpcsvc/yp.h>
52 struct dom_binding {};
53 #include <rpcsvc/ypclnt.h>
54 #include <rpcsvc/ypxfrd.h>
55 #include "ypxfr_extern.h"
57 char *progname = "ypxfr";
58 char *yp_dir = _PATH_YP;
60 int ypxfr_use_yplib = 0; /* Assume the worst. */
62 int ypxfr_prognum = 0;
63 struct sockaddr_in ypxfr_callback_addr;
64 struct yppushresp_xfr ypxfr_resp;
68 ypxfr_exit(ypxfrstat retval, char *temp)
71 int sock = RPC_ANYSOCK;
72 struct timeval timeout;
74 /* Clean up no matter what happened previously. */
77 (void)(dbp->close)(dbp);
78 if (unlink(temp) == -1) {
79 yp_error("failed to unlink %s",strerror(errno));
87 if ((clnt = clntudp_create(&ypxfr_callback_addr, ypxfr_prognum,
88 1, timeout, &sock)) == NULL) {
89 yp_error("%s", clnt_spcreateerror("failed to "
90 "establish callback handle"));
94 ypxfr_resp.status = retval;
96 if (yppushproc_xfrresp_1(&ypxfr_resp, clnt) == NULL) {
97 yp_error("%s", clnt_sperror(clnt, "callback failed"));
103 yp_error("Exiting: %s", ypxfrerr_string(retval));
113 ypxfr_exit(YPXFR_BADARGS,NULL);
115 fprintf(stderr, "%s\n%s\n%s\n",
116 "usage: ypxfr [-f] [-c] [-d target domain] [-h source host]",
117 " [-s source domain] [-p path]",
118 " [-C taskid program-number ipaddr port] mapname");
124 ypxfr_foreach(int status, char *key, int keylen, char *val, int vallen,
129 if (status != YP_TRUE)
133 * XXX Do not attempt to write zero-length keys or
134 * data into a Berkeley DB hash database. It causes a
135 * strange failure mode where sequential searches get
136 * caught in an infinite loop.
153 if (yp_put_record(dbp, &dbkey, &dbval, 0) != YP_TRUE)
160 main(int argc, char *argv[])
164 char *ypxfr_dest_domain = NULL;
165 char *ypxfr_source_host = NULL;
166 char *ypxfr_source_domain = NULL;
167 char *ypxfr_local_domain = NULL;
168 char *ypxfr_master = NULL;
169 unsigned long ypxfr_order = -1, ypxfr_skew_check = -1;
170 char *ypxfr_mapname = NULL;
172 char ypxfr_temp_map[MAXPATHLEN + 2];
173 char tempmap[MAXPATHLEN + 2];
174 char buf[MAXPATHLEN + 2];
182 if (!isatty(fileno(stderr))) {
183 openlog("ypxfr", LOG_PID, LOG_DAEMON);
190 while ((ch = getopt(argc, argv, "fcd:h:s:p:C:")) != -1) {
202 ypxfr_dest_domain = optarg;
206 ypxfr_source_host = optarg;
210 ypxfr_source_domain = optarg;
219 * Whoever decided that the -C flag should take
220 * four arguments is a twit.
222 my_optind = optind - 1;
223 if (argv[my_optind] == NULL || !strlen(argv[my_optind])) {
224 yp_error("transaction ID not specified");
227 ypxfr_resp.transid = atol(argv[my_optind]);
229 if (argv[my_optind] == NULL || !strlen(argv[my_optind])) {
230 yp_error("RPC program number not specified");
233 ypxfr_prognum = atol(argv[my_optind]);
235 if (argv[my_optind] == NULL || !strlen(argv[my_optind])) {
236 yp_error("address not specified");
239 if (!inet_aton(argv[my_optind], &ypxfr_callback_addr.sin_addr)) {
240 yp_error("failed to convert '%s' to IP addr",
245 if (argv[my_optind] == NULL || !strlen(argv[my_optind])) {
246 yp_error("port not specified");
249 ypxfr_callback_addr.sin_port = htons((u_short)atoi(argv[my_optind]));
258 ypxfr_mapname = argv[ypxfr_args + 1];
260 if (ypxfr_mapname == NULL) {
261 yp_error("no map name specified");
265 /* Always the case. */
266 ypxfr_callback_addr.sin_family = AF_INET;
268 /* Determine if local NIS client facilities are turned on. */
269 if (!yp_get_default_domain(&ypxfr_local_domain) &&
270 _yp_check(&ypxfr_local_domain))
274 * If no destination domain is specified, assume that the
275 * local default domain is to be used and try to obtain it.
276 * Fails if NIS client facilities are turned off.
278 if (ypxfr_dest_domain == NULL) {
279 if (ypxfr_use_yplib) {
280 yp_get_default_domain(&ypxfr_dest_domain);
282 yp_error("no destination domain specified and \
283 the local domain name isn't set");
284 ypxfr_exit(YPXFR_BADARGS,NULL);
289 * If a source domain is not specified, assume it to
290 * be the same as the destination domain.
292 if (ypxfr_source_domain == NULL) {
293 ypxfr_source_domain = ypxfr_dest_domain;
297 * If the source host is not specified, assume it to be the
298 * master for the specified map. If local NIS client facilities
299 * are turned on, we can figure this out using yp_master().
300 * If not, we have to see if a local copy of the map exists
301 * and extract its YP_MASTER_NAME record. If _that_ fails,
302 * we are stuck and must ask the user for more information.
304 if (ypxfr_source_host == NULL) {
305 if (!ypxfr_use_yplib) {
307 * Double whammy: NIS isn't turned on and the user
308 * didn't specify a source host.
311 key.data = "YP_MASTER_NAME";
312 key.size = sizeof("YP_MASTER_NAME") - 1;
314 if (yp_get_record(ypxfr_dest_domain, ypxfr_mapname,
315 &key, &data, 1) != YP_TRUE) {
316 yp_error("no source host specified");
317 ypxfr_exit(YPXFR_BADARGS,NULL);
320 dptr[data.size] = '\0';
321 ypxfr_master = ypxfr_source_host = strdup(dptr);
328 if (ypxfr_master == NULL) {
329 if ((ypxfr_master = ypxfr_get_master(ypxfr_source_domain,
332 ypxfr_use_yplib)) == NULL) {
333 yp_error("failed to find master of %s in domain %s: %s",
334 ypxfr_mapname, ypxfr_source_domain,
335 ypxfrerr_string(yp_errno));
336 ypxfr_exit(YPXFR_MADDR,NULL);
341 * If we got here and ypxfr_source_host is still undefined,
342 * it means we had to resort to using yp_master() to find the
343 * master server for the map. The source host and master should
346 if (ypxfr_source_host == NULL)
347 ypxfr_source_host = ypxfr_master;
350 * Don't talk to ypservs on unprivileged ports.
352 remoteport = getrpcport(ypxfr_source_host, YPPROG, YPVERS, IPPROTO_UDP);
353 if (remoteport >= IPPORT_RESERVED) {
354 yp_error("ypserv on %s not running on reserved port",
356 ypxfr_exit(YPXFR_REFUSED, NULL);
359 if ((ypxfr_order = ypxfr_get_order(ypxfr_source_domain,
361 ypxfr_master, 0)) == 0) {
362 yp_error("failed to get order number of %s: %s",
363 ypxfr_mapname, yp_errno == YPXFR_SUCC ?
364 "map has order 0" : ypxfrerr_string(yp_errno));
365 ypxfr_exit(YPXFR_YPERR,NULL);
368 if (ypxfr_match(ypxfr_master, ypxfr_source_domain, ypxfr_mapname,
369 "YP_INTERDOMAIN", sizeof("YP_INTERDOMAIN") - 1))
372 if (ypxfr_match(ypxfr_master, ypxfr_source_domain, ypxfr_mapname,
373 "YP_SECURE", sizeof("YP_SECURE") - 1))
376 key.data = "YP_LAST_MODIFIED";
377 key.size = sizeof("YP_LAST_MODIFIED") - 1;
379 /* The order number is immaterial when the 'force' flag is set. */
383 if (yp_get_record(ypxfr_dest_domain,ypxfr_mapname,&key,&data,1) != YP_TRUE) {
386 ypxfr_exit(YPXFR_FORCE,NULL);
390 * If the map doesn't exist, we're
391 * creating it. Ignore the error.
397 ypxfr_exit(YPXFR_DBM,NULL);
401 if (!ignore && ypxfr_order <= atoi(data.data))
402 ypxfr_exit(YPXFR_AGE, NULL);
406 /* Construct a temporary map file name */
407 snprintf(tempmap, sizeof(tempmap), "%s.%d",ypxfr_mapname, getpid());
408 snprintf(ypxfr_temp_map, sizeof(ypxfr_temp_map), "%s/%s/%s", yp_dir,
409 ypxfr_dest_domain, tempmap);
411 if ((remoteport = getrpcport(ypxfr_source_host, YPXFRD_FREEBSD_PROG,
412 YPXFRD_FREEBSD_VERS, IPPROTO_TCP))) {
414 /* Don't talk to rpc.ypxfrds on unprovileged ports. */
415 if (remoteport >= IPPORT_RESERVED) {
416 yp_error("rpc.ypxfrd on %s not using privileged port",
418 ypxfr_exit(YPXFR_REFUSED, NULL);
421 /* Try to send using ypxfrd. If it fails, use old method. */
422 if (!ypxfrd_get_map(ypxfr_source_host, ypxfr_mapname,
423 ypxfr_source_domain, ypxfr_temp_map))
427 /* Open the temporary map read/write. */
428 if ((dbp = yp_open_db_rw(ypxfr_dest_domain, tempmap, 0)) == NULL) {
429 yp_error("failed to open temporary map file");
430 ypxfr_exit(YPXFR_DBM,NULL);
434 * Fill in the keys we already know, such as the order number,
435 * master name, input file name (we actually make up a bogus
436 * name for that) and output file name.
438 snprintf(buf, sizeof(buf), "%lu", ypxfr_order);
440 data.size = strlen(buf);
442 if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
443 yp_error("failed to write order number to database");
444 ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
447 key.data = "YP_MASTER_NAME";
448 key.size = sizeof("YP_MASTER_NAME") - 1;
449 data.data = ypxfr_master;
450 data.size = strlen(ypxfr_master);
452 if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
453 yp_error("failed to write master name to database");
454 ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
457 key.data = "YP_DOMAIN_NAME";
458 key.size = sizeof("YP_DOMAIN_NAME") - 1;
459 data.data = ypxfr_dest_domain;
460 data.size = strlen(ypxfr_dest_domain);
462 if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
463 yp_error("failed to write domain name to database");
464 ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
467 snprintf (buf, sizeof(buf), "%s:%s", ypxfr_source_host, ypxfr_mapname);
469 key.data = "YP_INPUT_NAME";
470 key.size = sizeof("YP_INPUT_NAME") - 1;
472 data.size = strlen(buf);
474 if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
475 yp_error("failed to write input name to database");
476 ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
480 snprintf(buf, sizeof(buf), "%s/%s/%s", yp_dir, ypxfr_dest_domain,
483 key.data = "YP_OUTPUT_NAME";
484 key.size = sizeof("YP_OUTPUT_NAME") - 1;
486 data.size = strlen(buf);
488 if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
489 yp_error("failed to write output name to database");
490 ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
494 key.data = "YP_INTERDOMAIN";
495 key.size = sizeof("YP_INTERDOMAIN") - 1;
499 if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
500 yp_error("failed to add interdomain flag to database");
501 ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
506 key.data = "YP_SECURE";
507 key.size = sizeof("YP_SECURE") - 1;
511 if (yp_put_record(dbp, &key, &data, 0) != YP_TRUE) {
512 yp_error("failed to add secure flag to database");
513 ypxfr_exit(YPXFR_DBM,ypxfr_temp_map);
517 /* Now suck over the contents of the map from the master. */
519 if (ypxfr_get_map(ypxfr_mapname,ypxfr_source_domain,
520 ypxfr_source_host, ypxfr_foreach)){
521 yp_error("failed to retrieve map from source host");
522 ypxfr_exit(YPXFR_YPERR,ypxfr_temp_map);
525 (void)(dbp->close)(dbp);
526 dbp = NULL; /* <- yes, it seems this is necessary. */
530 snprintf(buf, sizeof(buf), "%s/%s/%s", yp_dir, ypxfr_dest_domain,
533 /* Peek at the order number again and check for skew. */
534 if ((ypxfr_skew_check = ypxfr_get_order(ypxfr_source_domain,
536 ypxfr_master, 0)) == 0) {
537 yp_error("failed to get order number of %s: %s",
538 ypxfr_mapname, yp_errno == YPXFR_SUCC ?
539 "map has order 0" : ypxfrerr_string(yp_errno));
540 ypxfr_exit(YPXFR_YPERR,ypxfr_temp_map);
543 if (ypxfr_order != ypxfr_skew_check)
544 ypxfr_exit(YPXFR_SKEW,ypxfr_temp_map);
547 * Send a YPPROC_CLEAR to the local ypserv.
553 if ((stat = callrpc("localhost",YPPROG,YPVERS,YPPROC_CLEAR,
554 xdr_void, (void *)&in,
555 xdr_void, (void *)out)) != RPC_SUCCESS) {
556 yp_error("failed to send 'clear' to local ypserv: %s",
557 clnt_sperrno((enum clnt_stat) stat));
558 ypxfr_exit(YPXFR_CLEAR, ypxfr_temp_map);
563 * Put the new map in place immediately. I'm not sure if the
564 * kernel does an unlink() and rename() atomically in the event
565 * that we move a new copy of a map over the top of an existing
566 * one, but there's less chance of a race condition happening
567 * than if we were to do the unlink() ourselves.
569 if (rename(ypxfr_temp_map, buf) == -1) {
570 yp_error("rename(%s,%s) failed: %s", ypxfr_temp_map, buf,
572 ypxfr_exit(YPXFR_FILE,NULL);
575 ypxfr_exit(YPXFR_SUCC,NULL);