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 1.5 2006/03/25 07:44:14 dillon 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 <fstab.h> 45 #include <sys/param.h> 46 #include <sys/sysctl.h> 47 #include <sys/stat.h> 48 #include <sysexits.h> 49 50 void usage(void) __dead2; 51 52 int 53 main(int argc, char **argv) 54 { 55 int ch, verbose, rv; 56 struct stat stab; 57 int mib[2]; 58 char *path; 59 60 verbose = rv = 0; 61 while ((ch = getopt(argc, argv, "v")) != -1) { 62 switch((char)ch) { 63 case 'v': 64 verbose = 1; 65 break; 66 case '?': 67 default: 68 usage(); 69 } 70 } 71 argv += optind; 72 73 if (argv[0] == NULL || argv[1]) 74 usage(); 75 76 path = argv[0]; 77 if (strcmp(path, "off") == 0) { 78 stab.st_rdev = NODEV; 79 } else { 80 path = getdevpath(path, 0); 81 rv = stat(path, &stab); 82 if (rv) 83 err(EX_OSFILE, "%s", path); 84 85 if (!S_ISCHR(stab.st_mode)) { 86 errx(EX_USAGE, 87 "%s: must specify a character disk device", 88 path); 89 } 90 } 91 92 mib[0] = CTL_KERN; 93 mib[1] = KERN_DUMPDEV; 94 95 rv = sysctl(mib, 2, NULL, NULL, &stab.st_rdev, sizeof stab.st_rdev); 96 if (rv) { 97 err(EX_OSERR, "sysctl: kern.dumpdev"); 98 } 99 100 if (verbose) { 101 if (stab.st_rdev == NODEV) { 102 printf("dumpon: crash dumps disabled\n"); 103 } else { 104 printf("dumpon: crash dumps to %s (%lu, %#lx)\n", 105 path, 106 (unsigned long)major(stab.st_rdev), 107 (unsigned long)minor(stab.st_rdev)); 108 } 109 } 110 111 return 0; 112 } 113 114 void 115 usage(void) 116 { 117 fprintf(stderr, 118 "usage: dumpon [-v] special_file\n" 119 " dumpon [-v] off\n"); 120 exit(EX_USAGE); 121 } 122