xref: /dragonfly/usr.sbin/rpcbind/rpcbind.c (revision d316f7c9) 
1 /*
2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3  * unrestricted use provided that this legend is included on all tape
4  * media and as a part of the software program in whole or part.  Users
5  * may copy or modify Sun RPC without charge, but are not authorized
6  * to license or distribute it to anyone else except as part of a product or
7  * program developed by the user.
8  *
9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12  *
13  * Sun RPC is provided with no support and without any obligation on the
14  * part of Sun Microsystems, Inc. to assist in its use, correction,
15  * modification or enhancement.
16  *
17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19  * OR ANY PART THEREOF.
20  *
21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22  * or profits or other special, indirect and consequential damages, even if
23  * Sun has been advised of the possibility of such damages.
24  *
25  * Sun Microsystems, Inc.
26  * 2550 Garcia Avenue
27  * Mountain View, California  94043
28  *
29  * @(#)rpcbind.c	1.19	94/04/25 SMI; 1.35 89/04/21 Copyr 1984 Sun Micro
30  * $NetBSD: rpcbind.c,v 1.3 2002/11/08 00:16:40 fvdl Exp $
31  * $FreeBSD: src/usr.sbin/rpcbind/rpcbind.c,v 1.20 2008/02/14 20:12:23 yar Exp $
32  */
33 /*
34  * Copyright (c) 1984 - 1991 by Sun Microsystems, Inc.
35  */
36 
37 /*
38  * rpcbind.c
39  * Implements the program, version to address mapping for rpc.
40  *
41  */
42 
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #include <sys/errno.h>
46 #include <sys/time.h>
47 #include <sys/resource.h>
48 #include <sys/wait.h>
49 #include <sys/signal.h>
50 #include <sys/socket.h>
51 #include <sys/un.h>
52 #include <rpc/rpc.h>
53 #include <rpc/rpc_com.h>
54 #ifdef PORTMAP
55 #include <netinet/in.h>
56 #endif
57 #include <arpa/inet.h>
58 #include <fcntl.h>
59 #include <netdb.h>
60 #include <stdio.h>
61 #include <netconfig.h>
62 #include <stdlib.h>
63 #include <unistd.h>
64 #include <syslog.h>
65 #include <err.h>
66 #include <libutil.h>
67 #include <pwd.h>
68 #include <string.h>
69 #include <errno.h>
70 #include "rpcbind.h"
71 
72 /* Global variables */
73 int debugging = 0;	/* Tell me what's going on */
74 int doabort = 0;	/* When debugging, do an abort on errors */
75 rpcblist_ptr list_rbl;	/* A list of version 3/4 rpcbind services */
76 
77 /* who to suid to if -s is given */
78 #define RUN_AS  "daemon"
79 
80 #define RPCBINDDLOCK "/var/run/rpcbind.lock"
81 
82 int runasdaemon = 0;
83 int insecure = 0;
84 int oldstyle_local = 0;
85 int verboselog = 0;
86 
87 char **hosts = NULL;
88 int ipv6_only = 0;
89 int nhosts = 0;
90 int on = 1;
91 int rpcbindlockfd;
92 
93 #ifdef WARMSTART
94 /* Local Variable */
95 static int warmstart = 0;	/* Grab an old copy of registrations. */
96 #endif
97 
98 #ifdef PORTMAP
99 struct pmaplist *list_pml;	/* A list of version 2 rpcbind services */
100 char *udptrans;		/* Name of UDP transport */
101 char *tcptrans;		/* Name of TCP transport */
102 char *udp_uaddr;	/* Universal UDP address */
103 char *tcp_uaddr;	/* Universal TCP address */
104 #endif
105 static char servname[] = "rpcbind";
106 static char superuser[] = "superuser";
107 
108 static int	init_transport(struct netconfig *);
109 static void	rbllist_add(rpcprog_t, rpcvers_t, struct netconfig *,
110 			    struct netbuf *);
111 static void	terminate(int);
112 static void	parseargs(int, char *[]);
113 
114 int
115 main(int argc, char *argv[])
116 {
117 	struct netconfig *nconf;
118 	void *nc_handle;	/* Net config handle */
119 	struct rlimit rl;
120 	int maxrec = RPC_MAXDATASIZE;
121 
122 	parseargs(argc, argv);
123 
124 	/* Check that another rpcbind isn't already running. */
125 	if ((rpcbindlockfd = (open(RPCBINDDLOCK,
126 	    O_RDONLY|O_CREAT, 0444))) == -1)
127 		err(1, "%s", RPCBINDDLOCK);
128 
129 	if(flock(rpcbindlockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK)
130 		errx(1, "another rpcbind is already running. Aborting");
131 
132 	getrlimit(RLIMIT_NOFILE, &rl);
133 	if (rl.rlim_cur < 128) {
134 		if (rl.rlim_max <= 128)
135 			rl.rlim_cur = rl.rlim_max;
136 		else
137 			rl.rlim_cur = 128;
138 		setrlimit(RLIMIT_NOFILE, &rl);
139 	}
140 	openlog("rpcbind", LOG_CONS, LOG_DAEMON);
141 	if (geteuid()) { /* This command allowed only to root */
142 		fprintf(stderr, "Sorry. You are not superuser\n");
143 		exit(1);
144 	}
145 	nc_handle = setnetconfig(); 	/* open netconfig file */
146 	if (nc_handle == NULL) {
147 		syslog(LOG_ERR, "could not read /etc/netconfig");
148 		exit(1);
149 	}
150 #ifdef PORTMAP
151 	udptrans = "";
152 	tcptrans = "";
153 #endif
154 
155 	nconf = getnetconfigent("local");
156 	if (nconf == NULL)
157 		nconf = getnetconfigent("unix");
158 	if (nconf == NULL) {
159 		syslog(LOG_ERR, "%s: can't find local transport\n", argv[0]);
160 		exit(1);
161 	}
162 
163 	rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec);
164 
165 	init_transport(nconf);
166 
167 	while ((nconf = getnetconfig(nc_handle))) {
168 	    if (nconf->nc_flag & NC_VISIBLE)
169 		if (ipv6_only != 1 || strcmp(nconf->nc_protofmly, "inet") != 0)
170 		    init_transport(nconf);
171 	}
172 	endnetconfig(nc_handle);
173 
174 	/* catch the usual termination signals for graceful exit */
175 	signal(SIGCHLD, reap);
176 	signal(SIGINT, terminate);
177 	signal(SIGTERM, terminate);
178 	signal(SIGQUIT, terminate);
179 	/* ignore others that could get sent */
180 	signal(SIGPIPE, SIG_IGN);
181 	signal(SIGHUP, SIG_IGN);
182 	signal(SIGUSR1, SIG_IGN);
183 	signal(SIGUSR2, SIG_IGN);
184 #ifdef WARMSTART
185 	if (warmstart) {
186 		read_warmstart();
187 	}
188 #endif
189 	if (debugging) {
190 		printf("rpcbind debugging enabled.");
191 		if (doabort) {
192 			printf("  Will abort on errors!\n");
193 		} else {
194 			printf("\n");
195 		}
196 	} else {
197 		if (daemon(0, 0))
198 			err(1, "fork failed");
199 	}
200 
201 	if (runasdaemon) {
202 		struct passwd *p;
203 
204 		if((p = getpwnam(RUN_AS)) == NULL) {
205 			syslog(LOG_ERR, "cannot get uid of daemon: %m");
206 			exit(1);
207 		}
208 		if (setuid(p->pw_uid) == -1) {
209 			syslog(LOG_ERR, "setuid to daemon failed: %m");
210 			exit(1);
211 		}
212 	}
213 
214 	network_init();
215 
216 	my_svc_run();
217 	syslog(LOG_ERR, "svc_run returned unexpectedly");
218 	rpcbind_abort();
219 	/* NOTREACHED */
220 
221 	return 0;
222 }
223 
224 /*
225  * Adds the entry into the rpcbind database.
226  * If PORTMAP, then for UDP and TCP, it adds the entries for version 2 also
227  * Returns 0 if succeeds, else fails
228  */
229 static int
230 init_transport(struct netconfig *nconf)
231 {
232 	int fd;
233 	struct t_bind taddr;
234 	struct addrinfo hints, *res = NULL;
235 	struct __rpc_sockinfo si;
236 	SVCXPRT	*my_xprt;
237 	int status;	/* bound checking ? */
238 	int aicode;
239 	int addrlen;
240 	int nhostsbak;
241 	int bound;
242 	struct sockaddr *sa;
243 	u_int32_t host_addr[4];  /* IPv4 or IPv6 */
244 	struct sockaddr_un sun;
245 	mode_t oldmask;
246 
247 	if ((nconf->nc_semantics != NC_TPI_CLTS) &&
248 	    (nconf->nc_semantics != NC_TPI_COTS) &&
249 	    (nconf->nc_semantics != NC_TPI_COTS_ORD))
250 	    return (1);	/* not my type */
251 #ifdef ND_DEBUG
252 	if (debugging) {
253 	    int i;
254 	    char **s;
255 
256 	    fprintf(stderr, "%s: %ld lookup routines :\n",
257 		nconf->nc_netid, nconf->nc_nlookups);
258 	    for (i = 0, s = nconf->nc_lookups; i < nconf->nc_nlookups;
259 		i++, s++)
260 		fprintf(stderr, "[%d] - %s\n", i, *s);
261 	}
262 #endif
263 
264 	/*
265 	 * XXX - using RPC library internal functions.
266 	 */
267 	if ((strcmp(nconf->nc_netid, "local") == 0) ||
268 	    (strcmp(nconf->nc_netid, "unix") == 0)) {
269 	    /*
270 	     * For other transports we call this later, for each socket we
271 	     * like to bind.
272 	     */
273 	    if ((fd = __rpc_nconf2fd(nconf)) < 0) {
274 		int non_fatal = 0;
275 		if (errno == EPROTONOSUPPORT)
276 		    non_fatal = 1;
277 		syslog(non_fatal?LOG_DEBUG:LOG_ERR, "cannot create socket for %s",
278 		    nconf->nc_netid);
279 		return (1);
280 	    }
281 	}
282 
283 	if (!__rpc_nconf2sockinfo(nconf, &si)) {
284 	    syslog(LOG_ERR, "cannot get information for %s",
285 		nconf->nc_netid);
286 	    return (1);
287 	}
288 
289 	if ((strcmp(nconf->nc_netid, "local") == 0) ||
290 	    (strcmp(nconf->nc_netid, "unix") == 0)) {
291 	    memset(&sun, 0, sizeof sun);
292 	    sun.sun_family = AF_LOCAL;
293 	    unlink(_PATH_RPCBINDSOCK);
294 	    strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
295 	    sun.sun_len = SUN_LEN(&sun);
296 	    addrlen = sizeof (struct sockaddr_un);
297 	    sa = (struct sockaddr *)&sun;
298 	} else {
299 	    /* Get rpcbind's address on this transport */
300 
301 	    memset(&hints, 0, sizeof hints);
302 	    hints.ai_flags = AI_PASSIVE;
303 	    hints.ai_family = si.si_af;
304 	    hints.ai_socktype = si.si_socktype;
305 	    hints.ai_protocol = si.si_proto;
306 	}
307 
308 	if ((strcmp(nconf->nc_netid, "local") != 0) &&
309 	    (strcmp(nconf->nc_netid, "unix") != 0)) {
310 	    /*
311 	     * If no hosts were specified, just bind to INADDR_ANY.
312 	     * Otherwise  make sure 127.0.0.1 is added to the list.
313 	     */
314 	    nhostsbak = nhosts;
315 	    nhostsbak++;
316 	    hosts = realloc(hosts, nhostsbak * sizeof(char *));
317 	    if (nhostsbak == 1)
318 	        hosts[0] = "*";
319 	    else {
320 		if (hints.ai_family == AF_INET) {
321 		    hosts[nhostsbak - 1] = "127.0.0.1";
322 		} else if (hints.ai_family == AF_INET6) {
323 		    hosts[nhostsbak - 1] = "::1";
324 		} else
325 		    return 1;
326 	    }
327 
328 	    /*
329 	     * Bind to specific IPs if asked to
330 	     */
331 	    bound = 0;
332 	    while (nhostsbak > 0) {
333 		--nhostsbak;
334 		/*
335 		 * XXX - using RPC library internal functions.
336 		 */
337 		if ((fd = __rpc_nconf2fd(nconf)) < 0) {
338 		    int non_fatal = 0;
339 		    if (errno == EPROTONOSUPPORT &&
340 			nconf->nc_semantics != NC_TPI_CLTS)
341 			non_fatal = 1;
342 		    syslog(non_fatal ? LOG_DEBUG : LOG_ERR,
343 			"cannot create socket for %s", nconf->nc_netid);
344 		    return (1);
345 		}
346 		switch (hints.ai_family) {
347 		case AF_INET:
348 		    if (inet_pton(AF_INET, hosts[nhostsbak],
349 			host_addr) == 1) {
350 			hints.ai_flags &= AI_NUMERICHOST;
351 		    } else {
352 			/*
353 			 * Skip if we have an AF_INET6 address.
354 			 */
355 			if (inet_pton(AF_INET6,
356 			    hosts[nhostsbak], host_addr) == 1) {
357 			    close(fd);
358 			    continue;
359 			}
360 		    }
361 		    break;
362 		case AF_INET6:
363 		    if (inet_pton(AF_INET6, hosts[nhostsbak],
364 			host_addr) == 1) {
365 			hints.ai_flags &= AI_NUMERICHOST;
366 		    } else {
367 			/*
368 			 * Skip if we have an AF_INET address.
369 			 */
370 			if (inet_pton(AF_INET, hosts[nhostsbak],
371 			    host_addr) == 1) {
372 				close(fd);
373 				continue;
374 			}
375 		    }
376 		    if (setsockopt(fd, IPPROTO_IPV6,
377 			IPV6_V6ONLY, &on, sizeof on) < 0) {
378 			syslog(LOG_ERR,
379 			    "can't set v6-only binding for "
380 			    "ipv6 socket: %m");
381 			continue;
382 		    }
383 		    break;
384 		default:
385 		    break;
386 		}
387 
388 		/*
389 		 * If no hosts were specified, just bind to INADDR_ANY
390 		 */
391 		if (strcmp("*", hosts[nhostsbak]) == 0)
392 		    hosts[nhostsbak] = NULL;
393 		if ((strcmp(nconf->nc_netid, "local") != 0) &&
394 		    (strcmp(nconf->nc_netid, "unix") != 0)) {
395 		    if ((aicode = getaddrinfo(hosts[nhostsbak],
396 			servname, &hints, &res)) != 0) {
397 			syslog(LOG_ERR,
398 			    "cannot get local address for %s: %s",
399 			    nconf->nc_netid, gai_strerror(aicode));
400 			continue;
401 		    }
402 		    addrlen = res->ai_addrlen;
403 		    sa = (struct sockaddr *)res->ai_addr;
404 		}
405 		oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
406 		if (bind(fd, sa, addrlen) != 0) {
407 		    syslog(LOG_ERR, "cannot bind %s on %s: %m",
408 			(hosts[nhostsbak] == NULL) ? "*" :
409 			    hosts[nhostsbak], nconf->nc_netid);
410 		    if (res != NULL)
411 			freeaddrinfo(res);
412 		    continue;
413 		} else
414 		    bound = 1;
415 		umask(oldmask);
416 
417 		/* Copy the address */
418 		taddr.addr.len = taddr.addr.maxlen = addrlen;
419 		taddr.addr.buf = malloc(addrlen);
420 		if (taddr.addr.buf == NULL) {
421 		    syslog(LOG_ERR,
422 			"cannot allocate memory for %s address",
423 			nconf->nc_netid);
424 		    if (res != NULL)
425 			freeaddrinfo(res);
426 		    return 1;
427 		}
428 		memcpy(taddr.addr.buf, sa, addrlen);
429 #ifdef ND_DEBUG
430 		if (debugging) {
431 		    /*
432 		     * for debugging print out our universal
433 		     * address
434 		     */
435 		    char *uaddr;
436 		    struct netbuf nb;
437 
438 		    nb.buf = sa;
439 		    nb.len = nb.maxlen = sa->sa_len;
440 		    uaddr = taddr2uaddr(nconf, &nb);
441 		    fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
442 		    free(uaddr);
443 		}
444 #endif
445 
446 		if (nconf->nc_semantics != NC_TPI_CLTS)
447 		    listen(fd, SOMAXCONN);
448 
449 		my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
450 		    RPC_MAXDATASIZE, RPC_MAXDATASIZE);
451 		if (my_xprt == NULL) {
452 		    syslog(LOG_ERR, "%s: could not create service",
453 			nconf->nc_netid);
454 		    goto error;
455 		}
456 	    }
457 	    if (!bound)
458 		return 1;
459 	} else {
460 	    oldmask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
461 	    if (bind(fd, sa, addrlen) < 0) {
462 		syslog(LOG_ERR, "cannot bind %s: %m", nconf->nc_netid);
463 		if (res != NULL)
464 		    freeaddrinfo(res);
465 		return 1;
466 	    }
467 	    umask(oldmask);
468 
469 	    /* Copy the address */
470 	    taddr.addr.len = taddr.addr.maxlen = addrlen;
471 	    taddr.addr.buf = malloc(addrlen);
472 	    if (taddr.addr.buf == NULL) {
473 		syslog(LOG_ERR, "cannot allocate memory for %s address",
474 		    nconf->nc_netid);
475 		if (res != NULL)
476 		    freeaddrinfo(res);
477 		return 1;
478 	    }
479 	    memcpy(taddr.addr.buf, sa, addrlen);
480 #ifdef ND_DEBUG
481 	    if (debugging) {
482 		/* for debugging print out our universal address */
483 		char *uaddr;
484 		struct netbuf nb;
485 
486 		nb.buf = sa;
487 		nb.len = nb.maxlen = sa->sa_len;
488 		uaddr = taddr2uaddr(nconf, &nb);
489 		fprintf(stderr, "rpcbind : my address is %s\n", uaddr);
490 		free(uaddr);
491 	    }
492 #endif
493 
494 	    if (nconf->nc_semantics != NC_TPI_CLTS)
495 		listen(fd, SOMAXCONN);
496 
497 	    my_xprt = (SVCXPRT *)svc_tli_create(fd, nconf, &taddr,
498 		RPC_MAXDATASIZE, RPC_MAXDATASIZE);
499 	    if (my_xprt == NULL) {
500 		syslog(LOG_ERR, "%s: could not create service",
501 		    nconf->nc_netid);
502 		goto error;
503 	    }
504 	}
505 
506 #ifdef PORTMAP
507 	/*
508 	 * Register both the versions for tcp/ip, udp/ip and local.
509 	 */
510 	if ((strcmp(nconf->nc_protofmly, NC_INET) == 0 &&
511 		(strcmp(nconf->nc_proto, NC_TCP) == 0 ||
512 		strcmp(nconf->nc_proto, NC_UDP) == 0)) ||
513 		(strcmp(nconf->nc_netid, "unix") == 0) ||
514 		(strcmp(nconf->nc_netid, "local") == 0)) {
515 		struct pmaplist *pml;
516 
517 		if (!svc_register(my_xprt, PMAPPROG, PMAPVERS,
518 			pmap_service, 0)) {
519 			syslog(LOG_ERR, "could not register on %s",
520 					nconf->nc_netid);
521 			goto error;
522 		}
523 		pml = malloc(sizeof (struct pmaplist));
524 		if (pml == NULL) {
525 			syslog(LOG_ERR, "no memory!");
526 			exit(1);
527 		}
528 		pml->pml_map.pm_prog = PMAPPROG;
529 		pml->pml_map.pm_vers = PMAPVERS;
530 		pml->pml_map.pm_port = PMAPPORT;
531 		if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
532 			if (tcptrans[0]) {
533 				syslog(LOG_ERR,
534 				"cannot have more than one TCP transport");
535 				goto error;
536 			}
537 			tcptrans = strdup(nconf->nc_netid);
538 			pml->pml_map.pm_prot = IPPROTO_TCP;
539 
540 			/* Let's snarf the universal address */
541 			/* "h1.h2.h3.h4.p1.p2" */
542 			tcp_uaddr = taddr2uaddr(nconf, &taddr.addr);
543 		} else if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
544 			if (udptrans[0]) {
545 				syslog(LOG_ERR,
546 				"cannot have more than one UDP transport");
547 				goto error;
548 			}
549 			udptrans = strdup(nconf->nc_netid);
550 			pml->pml_map.pm_prot = IPPROTO_UDP;
551 
552 			/* Let's snarf the universal address */
553 			/* "h1.h2.h3.h4.p1.p2" */
554 			udp_uaddr = taddr2uaddr(nconf, &taddr.addr);
555 		} else if (strcmp(nconf->nc_netid, "local") == 0)
556 			pml->pml_map.pm_prot = IPPROTO_ST;
557 		else if (strcmp(nconf->nc_netid, "unix") == 0)
558 			pml->pml_map.pm_prot = IPPROTO_ST;
559 		pml->pml_next = list_pml;
560 		list_pml = pml;
561 
562 		/* Add version 3 information */
563 		pml = malloc(sizeof (struct pmaplist));
564 		if (pml == NULL) {
565 			syslog(LOG_ERR, "no memory!");
566 			exit(1);
567 		}
568 		pml->pml_map = list_pml->pml_map;
569 		pml->pml_map.pm_vers = RPCBVERS;
570 		pml->pml_next = list_pml;
571 		list_pml = pml;
572 
573 		/* Add version 4 information */
574 		pml = malloc (sizeof (struct pmaplist));
575 		if (pml == NULL) {
576 			syslog(LOG_ERR, "no memory!");
577 			exit(1);
578 		}
579 		pml->pml_map = list_pml->pml_map;
580 		pml->pml_map.pm_vers = RPCBVERS4;
581 		pml->pml_next = list_pml;
582 		list_pml = pml;
583 
584 		/* Also add version 2 stuff to rpcbind list */
585 		rbllist_add(PMAPPROG, PMAPVERS, nconf, &taddr.addr);
586 	}
587 #endif
588 
589 	/* version 3 registration */
590 	if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS, rpcb_service_3, NULL)) {
591 		syslog(LOG_ERR, "could not register %s version 3",
592 				nconf->nc_netid);
593 		goto error;
594 	}
595 	rbllist_add(RPCBPROG, RPCBVERS, nconf, &taddr.addr);
596 
597 	/* version 4 registration */
598 	if (!svc_reg(my_xprt, RPCBPROG, RPCBVERS4, rpcb_service_4, NULL)) {
599 		syslog(LOG_ERR, "could not register %s version 4",
600 				nconf->nc_netid);
601 		goto error;
602 	}
603 	rbllist_add(RPCBPROG, RPCBVERS4, nconf, &taddr.addr);
604 
605 	/* decide if bound checking works for this transport */
606 	status = add_bndlist(nconf, &taddr.addr);
607 #ifdef BIND_DEBUG
608 	if (debugging) {
609 		if (status < 0) {
610 			fprintf(stderr, "Error in finding bind status for %s\n",
611 				nconf->nc_netid);
612 		} else if (status == 0) {
613 			fprintf(stderr, "check binding for %s\n",
614 				nconf->nc_netid);
615 		} else if (status > 0) {
616 			fprintf(stderr, "No check binding for %s\n",
617 				nconf->nc_netid);
618 		}
619 	}
620 #endif
621 	/*
622 	 * rmtcall only supported on CLTS transports for now.
623 	 */
624 	if (nconf->nc_semantics == NC_TPI_CLTS) {
625 		status = create_rmtcall_fd(nconf);
626 
627 #ifdef BIND_DEBUG
628 		if (debugging) {
629 			if (status < 0) {
630 				fprintf(stderr,
631 				    "Could not create rmtcall fd for %s\n",
632 					nconf->nc_netid);
633 			} else {
634 				fprintf(stderr, "rmtcall fd for %s is %d\n",
635 					nconf->nc_netid, status);
636 			}
637 		}
638 #endif
639 	}
640 	return (0);
641 error:
642 	close(fd);
643 	return (1);
644 }
645 
646 static void
647 rbllist_add(rpcprog_t prog, rpcvers_t vers, struct netconfig *nconf,
648 	    struct netbuf *addr)
649 {
650 	rpcblist_ptr rbl;
651 
652 	rbl = malloc(sizeof (rpcblist));
653 	if (rbl == NULL) {
654 		syslog(LOG_ERR, "no memory!");
655 		exit(1);
656 	}
657 
658 	rbl->rpcb_map.r_prog = prog;
659 	rbl->rpcb_map.r_vers = vers;
660 	rbl->rpcb_map.r_netid = strdup(nconf->nc_netid);
661 	rbl->rpcb_map.r_addr = taddr2uaddr(nconf, addr);
662 	rbl->rpcb_map.r_owner = strdup(superuser);
663 	rbl->rpcb_next = list_rbl;	/* Attach to global list */
664 	list_rbl = rbl;
665 }
666 
667 /*
668  * Catch the signal and die
669  */
670 static void
671 terminate(int dummy __unused)
672 {
673 	close(rpcbindlockfd);
674 #ifdef WARMSTART
675 	syslog(LOG_ERR,
676 		"rpcbind terminating on signal. Restart with \"rpcbind -w\"");
677 	write_warmstart();	/* Dump yourself */
678 #endif
679 	exit(2);
680 }
681 
682 void
683 rpcbind_abort(void)
684 {
685 #ifdef WARMSTART
686 	write_warmstart();	/* Dump yourself */
687 #endif
688 	abort();
689 }
690 
691 /* get command line options */
692 static void
693 parseargs(int argc, char *argv[])
694 {
695 	int c;
696 
697 #ifdef WARMSTART
698 #define	WSOP	"w"
699 #else
700 #define	WSOP	""
701 #endif
702 	while ((c = getopt(argc, argv, "6adh:iLls" WSOP)) != -1) {
703 		switch (c) {
704 		case '6':
705 			ipv6_only = 1;
706 			break;
707 		case 'a':
708 			doabort = 1;	/* when debugging, do an abort on */
709 			break;		/* errors; for rpcbind developers */
710 					/* only! */
711 		case 'd':
712 			debugging = 1;
713 			break;
714 		case 'h':
715 			++nhosts;
716 			hosts = realloc(hosts, nhosts * sizeof(char *));
717 			if (hosts == NULL)
718 				errx(1, "Out of memory");
719 			hosts[nhosts - 1] = strdup(optarg);
720 			if (hosts[nhosts - 1] == NULL)
721 				errx(1, "Out of memory");
722 			break;
723 		case 'i':
724 			insecure = 1;
725 			break;
726 		case 'L':
727 			oldstyle_local = 1;
728 			break;
729 		case 'l':
730 			verboselog = 1;
731 			break;
732 		case 's':
733 			runasdaemon = 1;
734 			break;
735 #ifdef WARMSTART
736 		case 'w':
737 			warmstart = 1;
738 			break;
739 #endif
740 		default:	/* error */
741 			fprintf(stderr,
742 			    "usage: rpcbind [-6adiLls%s] [-h bindip]\n",
743 			    WSOP);
744 			exit (1);
745 		}
746 	}
747 	if (doabort && !debugging) {
748 	    fprintf(stderr,
749 		"-a (abort) specified without -d (debugging) -- ignored.\n");
750 	    doabort = 0;
751 	}
752 #undef WSOP
753 }
754 
755 void
756 reap(int dummy __unused)
757 {
758 	int save_errno = errno;
759 
760 	while (wait3(NULL, WNOHANG, NULL) > 0)
761 		;
762 	errno = save_errno;
763 }
764 
765 void
766 toggle_verboselog(int dummy __unused)
767 {
768 	verboselog = !verboselog;
769 }
770