2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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 by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)nfsiod.c 8.4 (Berkeley) 5/3/95
38 * $FreeBSD: src/sbin/nfsiod/nfsiod.c,v 1.9 1999/08/28 00:13:55 peter Exp $
39 * $DragonFly: src/sbin/nfsiod/nfsiod.c,v 1.2 2003/06/17 04:27:34 dillon Exp $
42 #include <sys/param.h>
43 #include <sys/syslog.h>
45 #include <sys/mount.h>
48 #include <nfs/rpcv2.h>
63 void nonfs __P((int));
64 void reapchild __P((int));
65 void usage __P((void));
68 * Nfsiod does asynchronous buffered I/O on behalf of the NFS client.
69 * It does not have to be running for correct operation, but will
81 error = getvfsbyname("nfs", &vfc);
82 if (error && vfsisloadable("nfs")) {
84 err(1, "vfsload(nfs)");
85 endvfsent(); /* flush cache */
86 error = getvfsbyname("nfs", &vfc);
89 errx(1, "NFS support is not available in the running kernel");
93 num_servers = DEFNFSDCNT;
94 while ((ch = getopt(argc, argv, "n:")) != -1)
97 num_servers = atoi(optarg);
98 if (num_servers < 1 || num_servers > MAXNFSDCNT) {
99 warnx("nfsiod count %d; reset to %d",
100 num_servers, DEFNFSDCNT);
101 num_servers = DEFNFSDCNT;
113 * Backward compatibility, trailing number is the count of daemons.
118 num_servers = atoi(argv[0]);
119 if (num_servers < 1 || num_servers > MAXNFSDCNT) {
120 warnx("nfsiod count %d; reset to %d", num_servers,
122 num_servers = DEFNFSDCNT;
128 (void)signal(SIGHUP, SIG_IGN);
129 (void)signal(SIGINT, SIG_IGN);
130 (void)signal(SIGQUIT, SIG_IGN);
131 (void)signal(SIGSYS, nonfs);
133 (void)signal(SIGCHLD, reapchild);
135 openlog("nfsiod:", LOG_PID, LOG_DAEMON);
137 while (num_servers--)
140 syslog(LOG_ERR, "fork: %m");
143 if (nfssvc(NFSSVC_BIOD, NULL) < 0) {
144 syslog(LOG_ERR, "nfssvc: %m");
156 syslog(LOG_ERR, "missing system call: NFS not available");
164 while (wait3(NULL, WNOHANG, NULL) > 0) {
172 (void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n");