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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)swapon.c 8.1 (Berkeley) 6/5/93 31 * $FreeBSD: src/sbin/dumpon/dumpon.c,v 1.10.2.2 2001/07/30 10:30:05 dd Exp $ 32 * $DragonFly: src/sbin/dumpon/dumpon.c,v 1.5 2006/03/25 07:44:14 dillon Exp $ 33 */ 34 35 #include <err.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <fstab.h> 41 #include <sys/param.h> 42 #include <sys/sysctl.h> 43 #include <sys/stat.h> 44 #include <sysexits.h> 45 46 void usage(void) __dead2; 47 48 int 49 main(int argc, char **argv) 50 { 51 int ch, verbose, rv; 52 struct stat stab; 53 int mib[2]; 54 char *path; 55 56 verbose = rv = 0; 57 while ((ch = getopt(argc, argv, "v")) != -1) { 58 switch((char)ch) { 59 case 'v': 60 verbose = 1; 61 break; 62 case '?': 63 default: 64 usage(); 65 } 66 } 67 argv += optind; 68 69 if (argv[0] == NULL || argv[1]) 70 usage(); 71 72 path = argv[0]; 73 if (strcmp(path, "off") == 0) { 74 stab.st_rdev = NODEV; 75 } else { 76 path = getdevpath(path, 0); 77 rv = stat(path, &stab); 78 if (rv) 79 err(EX_OSFILE, "%s", path); 80 81 if (!S_ISCHR(stab.st_mode)) { 82 errx(EX_USAGE, 83 "%s: must specify a character disk device", 84 path); 85 } 86 } 87 88 mib[0] = CTL_KERN; 89 mib[1] = KERN_DUMPDEV; 90 91 rv = sysctl(mib, 2, NULL, NULL, &stab.st_rdev, sizeof stab.st_rdev); 92 if (rv) { 93 err(EX_OSERR, "sysctl: kern.dumpdev"); 94 } 95 96 if (verbose) { 97 if (stab.st_rdev == NODEV) { 98 printf("dumpon: crash dumps disabled\n"); 99 } else { 100 printf("dumpon: crash dumps to %s (%lu, %#lx)\n", 101 path, 102 (unsigned long)major(stab.st_rdev), 103 (unsigned long)minor(stab.st_rdev)); 104 } 105 } 106 107 return 0; 108 } 109 110 void 111 usage(void) 112 { 113 fprintf(stderr, 114 "usage: dumpon [-v] special_file\n" 115 " dumpon [-v] off\n"); 116 exit(EX_USAGE); 117 } 118