rusersd.c revision 262435 
1/*-
2 * Copyright (c) 1993, John Brezak
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31static const char rcsid[] =
32  "$FreeBSD: stable/10/libexec/rpc.rusersd/rusersd.c 262435 2014-02-24 08:21:49Z brueffer $";
33#endif /* not lint */
34
35#include <stdlib.h>
36#include <rpc/rpc.h>
37#include <sys/socket.h>
38#include <signal.h>
39#include <syslog.h>
40#include <rpcsvc/rnusers.h>
41
42#include "extern.h"
43
44int from_inetd = 1;
45
46static void
47cleanup(int sig __unused)
48{
49	(void) rpcb_unset(RUSERSPROG, RUSERSVERS_IDLE, NULL);
50	(void) rpcb_unset(RUSERSPROG, RUSERSVERS_ORIG, NULL);
51	exit(0);
52}
53
54int
55main(int argc __unused, char *argv[] __unused)
56{
57	SVCXPRT *transp = NULL; /* Keep compiler happy. */
58	int ok;
59	struct sockaddr_storage from;
60	socklen_t fromlen;
61
62	/*
63	 * See if inetd started us
64	 */
65	fromlen = sizeof(from);
66	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
67		from_inetd = 0;
68	}
69
70	if (!from_inetd) {
71		daemon(0, 0);
72
73		(void) rpcb_unset(RUSERSPROG, RUSERSVERS_IDLE, NULL);
74		(void) rpcb_unset(RUSERSPROG, RUSERSVERS_ORIG, NULL);
75
76		(void) signal(SIGINT, cleanup);
77		(void) signal(SIGTERM, cleanup);
78		(void) signal(SIGHUP, cleanup);
79	}
80
81	openlog("rpc.rusersd", LOG_CONS|LOG_PID, LOG_DAEMON);
82
83	if (from_inetd) {
84		transp = svc_tli_create(0, NULL, NULL, 0, 0);
85		if (transp == NULL) {
86			syslog(LOG_ERR, "cannot create udp service.");
87			exit(1);
88		}
89		ok = svc_reg(transp, RUSERSPROG, RUSERSVERS_IDLE,
90			     rusers_service, NULL);
91	} else
92		ok = svc_create(rusers_service,
93				RUSERSPROG, RUSERSVERS_IDLE, "udp");
94	if (!ok) {
95		syslog(LOG_ERR, "unable to register (RUSERSPROG, RUSERSVERS_IDLE, %s)", (!from_inetd)?"udp":"(inetd)");
96		exit(1);
97	}
98	if (from_inetd)
99		ok = svc_reg(transp, RUSERSPROG, RUSERSVERS_ORIG,
100			     rusers_service, NULL);
101	else
102		ok = svc_create(rusers_service,
103				RUSERSPROG, RUSERSVERS_ORIG, "udp");
104	if (!ok) {
105		syslog(LOG_ERR, "unable to register (RUSERSPROG, RUSERSVERS_ORIG, %s)", (!from_inetd)?"udp":"(inetd)");
106		exit(1);
107	}
108
109	svc_run();
110	syslog(LOG_ERR, "svc_run returned");
111	exit(1);
112}
113