dumpon.c revision 21673
1207753Smm/* 2207753Smm * Copyright (c) 1980, 1993 3207753Smm * The Regents of the University of California. All rights reserved. 4207753Smm * 5207753Smm * Redistribution and use in source and binary forms, with or without 6207753Smm * modification, are permitted provided that the following conditions 7207753Smm * are met: 8207753Smm * 1. Redistributions of source code must retain the above copyright 9207753Smm * notice, this list of conditions and the following disclaimer. 10207753Smm * 2. Redistributions in binary form must reproduce the above copyright 11207753Smm * notice, this list of conditions and the following disclaimer in the 12207753Smm * documentation and/or other materials provided with the distribution. 13207753Smm * 3. All advertising materials mentioning features or use of this software 14207753Smm * must display the following acknowledgement: 15207753Smm * This product includes software developed by the University of 16207753Smm * California, Berkeley and its contributors. 17207753Smm * 4. Neither the name of the University nor the names of its contributors 18207753Smm * may be used to endorse or promote products derived from this software 19207753Smm * without specific prior written permission. 20207753Smm * 21207753Smm * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22207753Smm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23207753Smm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24207753Smm * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25207753Smm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26213700Smm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27292588Sdelphij * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28292588Sdelphij * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29292588Sdelphij * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30207753Smm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31207753Smm * SUCH DAMAGE. 32207753Smm */ 33207753Smm 34207753Smm#ifndef lint 35207753Smmstatic char copyright[] = 36207753Smm"@(#) Copyright (c) 1980, 1993\n\ 37207753Smm The Regents of the University of California. All rights reserved.\n"; 38207753Smm#endif /* not lint */ 39207753Smm 40207753Smm#ifndef lint 41207753Smm/*static char sccsid[] = "From: @(#)swapon.c 8.1 (Berkeley) 6/5/93";*/ 42207753Smmstatic const char rcsid[] = 43263285Sdelphij "$FreeBSD: head/sbin/dumpon/dumpon.c 21673 1997-01-14 07:20:47Z jkh $"; 44207753Smm#endif /* not lint */ 45207753Smm 46263285Sdelphij#include <errno.h> 47207753Smm#include <stdio.h> 48207753Smm#include <stdlib.h> 49207753Smm#include <unistd.h> 50207753Smm#include <sys/param.h> 51207753Smm#include <sys/types.h> 52207753Smm#include <sys/sysctl.h> 53207753Smm#include <sys/stat.h> 54312518Sdelphij#include <sysexits.h> 55292588Sdelphij#include <err.h> 56292588Sdelphij 57292588Sdelphijvoid usage __P((void)) __dead2; 58292588Sdelphijstatic char *whoami; 59292588Sdelphij 60292588Sdelphijint 61207753Smmmain(int argc, char **argv) 62292588Sdelphij{ 63207753Smm extern char *optarg; 64207753Smm extern int optind; 65207753Smm int ch, verbose, rv; 66207753Smm struct stat stab; 67207753Smm int mib[2]; 68207753Smm 69207753Smm verbose = rv = 0; 70207753Smm whoami = argv[0]; 71207753Smm while ((ch = getopt(argc, argv, "v")) != EOF) 72263285Sdelphij switch((char)ch) { 73263285Sdelphij case 'v': 74207753Smm verbose = 1; 75213700Smm break; 76213700Smm case '?': 77213700Smm default: 78213700Smm usage(); 79213700Smm } 80213700Smm argv += optind; 81213700Smm 82213700Smm if (!argv[0] || argv[1]) 83207753Smm usage(); 84207753Smm 85207753Smm if (strcmp(argv[0], "off")) { 86207753Smm rv = stat(argv[0], &stab); 87207753Smm if (rv) { 88263285Sdelphij err(EX_OSFILE, "%s", argv[0]); 89263285Sdelphij } 90263285Sdelphij 91263285Sdelphij if (!S_ISBLK(stab.st_mode)) { 92263285Sdelphij errx(EX_USAGE, "%s: must specify a block device", 93263285Sdelphij argv[0]); 94263285Sdelphij } 95263285Sdelphij } else { 96263285Sdelphij stab.st_rdev = NODEV; 97263285Sdelphij } 98207753Smm 99207753Smm mib[0] = CTL_KERN; 100263285Sdelphij mib[1] = KERN_DUMPDEV; 101263285Sdelphij 102207753Smm rv = sysctl(mib, 2, (void *)0, (size_t *)0, &stab.st_rdev, 103207753Smm sizeof stab.st_rdev); 104207753Smm if (rv) { 105207753Smm err(EX_OSERR, "sysctl: kern.dumpdev"); 106207753Smm } 107207753Smm 108207753Smm if (verbose) { 109207753Smm if (stab.st_rdev == NODEV) { 110207753Smm printf("%s: crash dumps disabled\n", whoami); 111207753Smm } else { 112207753Smm printf("%s: crash dumps to %s (%lu, %lu)\n", 113207753Smm whoami, argv[0], 114207753Smm (unsigned long)major(stab.st_rdev), 115207753Smm (unsigned long)minor(stab.st_rdev)); 116263285Sdelphij } 117263285Sdelphij } 118263285Sdelphij 119263285Sdelphij return 0; 120263285Sdelphij} 121263285Sdelphij 122207753Smmvoid 123207753Smmusage() 124207753Smm{ 125207753Smm fprintf(stderr, 126223935Smm "usage: %s [-v] special_file\n" 127207753Smm " %s [-v] off\n", whoami, whoami); 128207753Smm exit(EX_USAGE); 129207753Smm} 130207753Smm