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