lockd.c revision 74462 
1/*	$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $	*/
2/*	$FreeBSD: head/usr.sbin/rpc.lockd/lockd.c 74462 2001-03-19 12:50:13Z alfred $ */
3
4/*
5 * Copyright (c) 1995
6 *	A.R. Gordon (andrew.gordon@net-tel.co.uk).  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed for the FreeBSD project
19 * 4. Neither the name of the author nor the names of any co-contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 */
36
37#include <sys/cdefs.h>
38#ifndef lint
39__RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $");
40#endif
41
42/*
43 * main() function for NFS lock daemon.  Most of the code in this
44 * file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x.
45 *
46 * The actual program logic is in the file lock_proc.c
47 */
48
49#include <sys/types.h>
50#include <sys/socket.h>
51
52#include <err.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <errno.h>
56#include <syslog.h>
57#include <signal.h>
58#include <string.h>
59#include <unistd.h>
60#include <libutil.h>
61#include <netconfig.h>
62
63#include <rpc/rpc.h>
64#include <rpcsvc/sm_inter.h>
65
66#include "lockd.h"
67#include <rpcsvc/nlm_prot.h>
68
69int		debug_level = 0;	/* 0 = no debugging syslog() calls */
70int		_rpcsvcdirty = 0;
71
72int grace_expired;
73
74int	main __P((int, char **));
75void	nlm_prog_0 __P((struct svc_req *, SVCXPRT *));
76void	nlm_prog_1 __P((struct svc_req *, SVCXPRT *));
77void	nlm_prog_3 __P((struct svc_req *, SVCXPRT *));
78void	nlm_prog_4 __P((struct svc_req *, SVCXPRT *));
79void	usage __P((void));
80
81void sigalarm_handler __P((int));
82
83char *transports[] = { "udp", "tcp", "udp6", "tcp6" };
84
85int
86main(argc, argv)
87	int argc;
88	char **argv;
89{
90	SVCXPRT *transp;
91	int ch, i, maxindex, s;
92	struct sigaction sigchild, sigalarm;
93	int grace_period = 30;
94	struct netconfig *nconf;
95
96	while ((ch = getopt(argc, argv, "d:g:")) != (-1)) {
97		switch (ch) {
98		case 'd':
99			debug_level = atoi(optarg);
100			if (!debug_level) {
101				usage();
102				/* NOTREACHED */
103			}
104			break;
105		case 'g':
106			grace_period = atoi(optarg);
107			if (!grace_period) {
108				usage();
109				/* NOTREACHED */
110			}
111			break;
112		default:
113		case '?':
114			usage();
115			/* NOTREACHED */
116		}
117	}
118	if (geteuid()) { /* This command allowed only to root */
119		fprintf(stderr, "Sorry. You are not superuser\n");
120		exit(1);
121        }
122
123	(void)rpcb_unset(NLM_PROG, NLM_SM, NULL);
124	(void)rpcb_unset(NLM_PROG, NLM_VERS, NULL);
125	(void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL);
126	(void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL);
127
128	/*
129	 * Check if IPv6 support is present.
130	 */
131	s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
132	if (s < 0)
133		maxindex = 2;
134	else {
135		close(s);
136		maxindex = 4;
137	}
138
139	for (i = 0; i < maxindex; i++) {
140		nconf = getnetconfigent(transports[i]);
141		if (nconf == NULL)
142			errx(1, "cannot get udp netconf.");
143
144		transp = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
145		if (transp == NULL) {
146			errx(1, "cannot create %s service.", transports[i]);
147			/* NOTREACHED */
148		}
149		if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0, nconf)) {
150			errx(1, "unable to register (NLM_PROG, NLM_SM, %s)",
151			    transports[i]);
152			/* NOTREACHED */
153		}
154		if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1, nconf)) {
155			errx(1, "unable to register (NLM_PROG, NLM_VERS, %s)",
156			    transports[i]);
157			/* NOTREACHED */
158		}
159		if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3, nconf)) {
160			errx(1, "unable to register (NLM_PROG, NLM_VERSX, %s)",
161			    transports[i]);
162			/* NOTREACHED */
163		}
164		if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4, nconf)) {
165			errx(1, "unable to register (NLM_PROG, NLM_VERS4, %s)",
166			    transports[i]);
167			/* NOTREACHED */
168		}
169		freenetconfigent(nconf);
170	}
171
172	/*
173	 * Note that it is NOT sensible to run this program from inetd - the
174	 * protocol assumes that it will run immediately at boot time.
175	 */
176	if (daemon(0, 0)) {
177		err(1, "cannot fork");
178		/* NOTREACHED */
179	}
180
181	openlog("rpc.lockd", 0, LOG_DAEMON);
182	if (debug_level)
183		syslog(LOG_INFO, "Starting, debug level %d", debug_level);
184	else
185		syslog(LOG_INFO, "Starting");
186
187	sigchild.sa_handler = sigchild_handler;
188	sigemptyset(&sigchild.sa_mask);
189	sigchild.sa_flags = SA_RESTART;
190	if (sigaction(SIGCHLD, &sigchild, NULL) != 0) {
191		syslog(LOG_WARNING, "sigaction(SIGCHLD) failed: %s",
192		    strerror(errno));
193		exit(1);
194	}
195	sigalarm.sa_handler = sigalarm_handler;
196	sigemptyset(&sigalarm.sa_mask);
197	sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
198	sigalarm.sa_flags |= SA_RESTART;
199	if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
200		syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s",
201		    strerror(errno));
202		exit(1);
203	}
204	grace_expired = 0;
205	if (alarm(10) < 0) {
206		syslog(LOG_WARNING, "alarm failed: %s",
207		    strerror(errno));
208		exit(1);
209	}
210
211	svc_run();		/* Should never return */
212	exit(1);
213}
214
215void
216sigalarm_handler(s)
217	int s;
218{
219	grace_expired = 1;
220}
221
222void
223usage()
224{
225	errx(1, "usage: rpc.lockd [-d <debuglevel>] [-g <grace period>]");
226}
227