1 /*
2 * Copyright (c) 1989 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
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 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.
23 *
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
34 * SUCH DAMAGE.
35 */
36
37 #ifndef lint
38 char copyright[] =
39 "@(#) Copyright (c) 1989 Regents of the University of California.\n\
40 All rights reserved.\n";
41 #endif not lint
42
43 #ifndef lint
44 static char sccsid[] = "@(#)nfsiod.c 5.4 (Berkeley) 6/29/90";
45 #endif not lint
46
47 #include <stdio.h>
48 #include <signal.h>
49 #include <fcntl.h>
50 #include <sys/types.h>
51 #include <sys/ioctl.h>
52
53 /* Global defs */
54 #ifdef DEBUG
55 int debug = 1;
56 #else
57 int debug = 0;
58 #endif
59
60 /*
61 * Nfsiod does asynchronous buffered I/O on behalf of the NFS client.
62 * It does not have to be running for correct operation, but will improve
63 * throughput. The one optional argument is the number of children to fork.
64 */
main(argc,argv)65 main(argc, argv)
66 int argc;
67 char *argv[];
68 {
69 register int i;
70 int cnt;
71
72 if (debug == 0) {
73 daemon(0, 0);
74 signal(SIGINT, SIG_IGN);
75 signal(SIGQUIT, SIG_IGN);
76 signal(SIGTERM, SIG_IGN);
77 signal(SIGHUP, SIG_IGN);
78 }
79 if (argc != 2 || (cnt = atoi(argv[1])) <= 0 || cnt > 20)
80 cnt = 1;
81 for (i = 1; i < cnt; i++)
82 if (fork() == 0)
83 break;
84 async_daemon(); /* Never returns */
85 exit(1);
86 }
87