1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. 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 static char copyright[] = 39 "@(#) Copyright (c) 1989, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif not lint 42 43 #ifndef lint 44 static char sccsid[] = "@(#)nfsiod.c 8.3 (Berkeley) 2/22/94"; 45 #endif not lint 46 47 #include <sys/param.h> 48 #include <sys/ioctl.h> 49 #include <sys/syslog.h> 50 #include <sys/ucred.h> 51 #include <sys/wait.h> 52 53 #include <nfs/nfsv2.h> 54 #include <nfs/nfs.h> 55 56 #include <err.h> 57 #include <errno.h> 58 #include <fcntl.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <unistd.h> 63 64 /* Global defs */ 65 #ifdef DEBUG 66 int debug = 1; 67 #else 68 int debug = 0; 69 #endif 70 71 void nonfs __P((int)); 72 void reapchild __P((int)); 73 void usage __P((void)); 74 75 /* 76 * Nfsiod does asynchronous buffered I/O on behalf of the NFS client. 77 * It does not have to be running for correct operation, but will 78 * improve throughput. 79 */ 80 int 81 main(argc, argv) 82 int argc; 83 char *argv[]; 84 { 85 int ch, num_servers; 86 87 #define MAXNFSDCNT 20 88 #define DEFNFSDCNT 1 89 num_servers = DEFNFSDCNT; 90 while ((ch = getopt(argc, argv, "n:")) != EOF) 91 switch (ch) { 92 case 'n': 93 num_servers = atoi(optarg); 94 if (num_servers < 1 || num_servers > MAXNFSDCNT) { 95 warnx("nfsiod count %d; reset to %d", 96 DEFNFSDCNT); 97 num_servers = DEFNFSDCNT; 98 } 99 break; 100 case '?': 101 default: 102 usage(); 103 } 104 argc -= optind; 105 argv += optind; 106 107 /* 108 * XXX 109 * Backward compatibility, trailing number is the count of daemons. 110 */ 111 if (argc > 1) 112 usage(); 113 if (argc == 1) { 114 num_servers = atoi(argv[0]); 115 if (num_servers < 1 || num_servers > MAXNFSDCNT) { 116 warnx("nfsiod count %d; reset to %d", DEFNFSDCNT); 117 num_servers = DEFNFSDCNT; 118 } 119 } 120 121 if (debug == 0) { 122 daemon(0, 0); 123 (void)signal(SIGHUP, SIG_IGN); 124 (void)signal(SIGINT, SIG_IGN); 125 (void)signal(SIGQUIT, SIG_IGN); 126 (void)signal(SIGSYS, nonfs); 127 } 128 (void)signal(SIGCHLD, reapchild); 129 130 openlog("nfsiod:", LOG_PID, LOG_DAEMON); 131 132 while (num_servers--) 133 switch (fork()) { 134 case -1: 135 syslog(LOG_ERR, "fork: %m"); 136 exit (1); 137 case 0: 138 if (nfssvc(NFSSVC_BIOD, NULL) < 0) { 139 syslog(LOG_ERR, "nfssvc: %m"); 140 exit (1); 141 } 142 exit(0); 143 } 144 exit (0); 145 } 146 147 void 148 nonfs(signo) 149 int signo; 150 { 151 syslog(LOG_ERR, "missing system call: NFS not available."); 152 } 153 154 void 155 reapchild(signo) 156 int signo; 157 { 158 159 while (wait3(NULL, WNOHANG, NULL)); 160 } 161 162 void 163 usage() 164 { 165 (void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n"); 166 exit(1); 167 } 168