rusersd.c revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1993, John Brezak
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 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef lint
33static const char rcsid[] =
34  "$FreeBSD: stable/11/libexec/rpc.rusersd/rusersd.c 330897 2018-03-14 03:19:51Z eadler $";
35#endif /* not lint */
36
37#include <stdlib.h>
38#include <rpc/rpc.h>
39#include <sys/socket.h>
40#include <signal.h>
41#include <syslog.h>
42#include <rpcsvc/rnusers.h>
43
44#include "extern.h"
45
46int from_inetd = 1;
47
48static void
49cleanup(int sig __unused)
50{
51	(void) rpcb_unset(RUSERSPROG, RUSERSVERS_IDLE, NULL);
52	(void) rpcb_unset(RUSERSPROG, RUSERSVERS_ORIG, NULL);
53	exit(0);
54}
55
56int
57main(int argc __unused, char *argv[] __unused)
58{
59	SVCXPRT *transp = NULL; /* Keep compiler happy. */
60	int ok;
61	struct sockaddr_storage from;
62	socklen_t fromlen;
63
64	/*
65	 * See if inetd started us
66	 */
67	fromlen = sizeof(from);
68	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
69		from_inetd = 0;
70	}
71
72	if (!from_inetd) {
73		daemon(0, 0);
74
75		(void) rpcb_unset(RUSERSPROG, RUSERSVERS_IDLE, NULL);
76		(void) rpcb_unset(RUSERSPROG, RUSERSVERS_ORIG, NULL);
77
78		(void) signal(SIGINT, cleanup);
79		(void) signal(SIGTERM, cleanup);
80		(void) signal(SIGHUP, cleanup);
81	}
82
83	openlog("rpc.rusersd", LOG_CONS|LOG_PID, LOG_DAEMON);
84
85	if (from_inetd) {
86		transp = svc_tli_create(0, NULL, NULL, 0, 0);
87		if (transp == NULL) {
88			syslog(LOG_ERR, "cannot create udp service.");
89			exit(1);
90		}
91		ok = svc_reg(transp, RUSERSPROG, RUSERSVERS_IDLE,
92			     rusers_service, NULL);
93	} else
94		ok = svc_create(rusers_service,
95				RUSERSPROG, RUSERSVERS_IDLE, "udp");
96	if (!ok) {
97		syslog(LOG_ERR, "unable to register (RUSERSPROG, RUSERSVERS_IDLE, %s)", (!from_inetd)?"udp":"(inetd)");
98		exit(1);
99	}
100	if (from_inetd)
101		ok = svc_reg(transp, RUSERSPROG, RUSERSVERS_ORIG,
102			     rusers_service, NULL);
103	else
104		ok = svc_create(rusers_service,
105				RUSERSPROG, RUSERSVERS_ORIG, "udp");
106	if (!ok) {
107		syslog(LOG_ERR, "unable to register (RUSERSPROG, RUSERSVERS_ORIG, %s)", (!from_inetd)?"udp":"(inetd)");
108		exit(1);
109	}
110
111	svc_run();
112	syslog(LOG_ERR, "svc_run returned");
113	exit(1);
114}
115