1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)swapon.c 8.1 (Berkeley) 6/5/93 35 * $FreeBSD: src/sbin/dumpon/dumpon.c,v 1.10.2.2 2001/07/30 10:30:05 dd Exp $ 36 * $DragonFly: src/sbin/dumpon/dumpon.c,v 1.3 2003/09/28 14:39:17 hmp Exp $ 37 */ 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <sys/param.h> 45 #include <sys/sysctl.h> 46 #include <sys/stat.h> 47 #include <sysexits.h> 48 49 void usage __P((void)) __dead2; 50 51 int 52 main(int argc, char **argv) 53 { 54 int ch, verbose, rv; 55 struct stat stab; 56 int mib[2]; 57 58 verbose = rv = 0; 59 while ((ch = getopt(argc, argv, "v")) != -1) 60 switch((char)ch) { 61 case 'v': 62 verbose = 1; 63 break; 64 case '?': 65 default: 66 usage(); 67 } 68 argv += optind; 69 70 if (!argv[0] || argv[1]) 71 usage(); 72 73 if (strcmp(argv[0], "off")) { 74 rv = stat(argv[0], &stab); 75 if (rv) { 76 err(EX_OSFILE, "%s", argv[0]); 77 } 78 79 if (!S_ISCHR(stab.st_mode)) { 80 errx(EX_USAGE, 81 "%s: must specify a character disk device", 82 argv[0]); 83 } 84 } else { 85 stab.st_rdev = NODEV; 86 } 87 88 mib[0] = CTL_KERN; 89 mib[1] = KERN_DUMPDEV; 90 91 rv = sysctl(mib, 2, (void *)0, (size_t *)0, &stab.st_rdev, 92 sizeof stab.st_rdev); 93 if (rv) { 94 err(EX_OSERR, "sysctl: kern.dumpdev"); 95 } 96 97 if (verbose) { 98 if (stab.st_rdev == NODEV) { 99 printf("dumpon: crash dumps disabled\n"); 100 } else { 101 printf("dumpon: crash dumps to %s (%lu, %lu)\n", 102 argv[0], 103 (unsigned long)major(stab.st_rdev), 104 (unsigned long)minor(stab.st_rdev)); 105 } 106 } 107 108 return 0; 109 } 110 111 void 112 usage(void) 113 { 114 fprintf(stderr, 115 "usage: dumpon [-v] special_file\n" 116 " dumpon [-v] off\n"); 117 exit(EX_USAGE); 118 } 119