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 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "From: @(#)swapon.c 8.1 (Berkeley) 6/5/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <err.h> 49 #include <stdio.h> 50 #include <unistd.h> 51 #include <sys/param.h> 52 #include <sys/types.h> 53 #include <sys/sysctl.h> 54 #include <sys/stat.h> 55 #include <sysexits.h> 56 57 void usage __P((void)) __dead2; 58 59 int 60 main(int argc, char **argv) 61 { 62 int ch, verbose, rv; 63 struct stat stab; 64 int mib[2]; 65 66 verbose = rv = 0; 67 while ((ch = getopt(argc, argv, "v")) != -1) 68 switch((char)ch) { 69 case 'v': 70 verbose = 1; 71 break; 72 case '?': 73 default: 74 usage(); 75 } 76 argv += optind; 77 78 if (!argv[0] || argv[1]) 79 usage(); 80 81 if (strcmp(argv[0], "off")) { 82 rv = stat(argv[0], &stab); 83 if (rv) { 84 err(EX_OSFILE, "%s", argv[0]); 85 } 86 87 if (!S_ISCHR(stab.st_mode)) { 88 errx(EX_USAGE, 89 "%s: must specify a character disk device", 90 argv[0]); 91 } 92 } else { 93 stab.st_rdev = NODEV; 94 } 95 96 mib[0] = CTL_KERN; 97 mib[1] = KERN_DUMPDEV; 98 99 rv = sysctl(mib, 2, (void *)0, (size_t *)0, &stab.st_rdev, 100 sizeof stab.st_rdev); 101 if (rv) { 102 err(EX_OSERR, "sysctl: kern.dumpdev"); 103 } 104 105 if (verbose) { 106 if (stab.st_rdev == NODEV) { 107 printf("dumpon: crash dumps disabled\n"); 108 } else { 109 printf("dumpon: crash dumps to %s (%lu, %lu)\n", 110 argv[0], 111 (unsigned long)major(stab.st_rdev), 112 (unsigned long)minor(stab.st_rdev)); 113 } 114 } 115 116 return 0; 117 } 118 119 void 120 usage() 121 { 122 fprintf(stderr, 123 "usage: dumpon [-v] special_file\n" 124 " dumpon [-v] off\n"); 125 exit(EX_USAGE); 126 } 127