2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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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
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29 * @(#)swapon.c 8.1 (Berkeley) 6/5/93
30 * $FreeBSD: src/sbin/dumpon/dumpon.c,v 1.10.2.2 2001/07/30 10:30:05 dd Exp $
40 #include <sys/param.h>
41 #include <sys/sysctl.h>
45 static void usage(void) __dead2;
48 main(int argc, char **argv)
56 if (strstr((p = strrchr(argv[0], '/')) ? p+1 : argv[0],
64 while ((ch = getopt(argc, argv, "v")) != -1) {
77 if ((is_dumpoff && argc != 0) || (!is_dumpoff && argc != 1))
81 if (is_dumpoff || strcmp(path, "off") == 0) {
84 path = getdevpath(path, 0);
85 rv = stat(path, &stab);
87 err(EX_OSFILE, "%s", path);
89 if (!S_ISCHR(stab.st_mode)) {
91 "%s: must specify a character disk device",
97 mib[1] = KERN_DUMPDEV;
99 rv = sysctl(mib, 2, NULL, NULL, &stab.st_rdev, sizeof stab.st_rdev);
101 err(EX_OSERR, "sysctl: kern.dumpdev");
105 if (stab.st_rdev == NODEV) {
106 printf("dumpon: crash dumps disabled\n");
108 printf("dumpon: crash dumps to %s (%lu, %#lx)\n",
110 (unsigned long)major(stab.st_rdev),
111 (unsigned long)minor(stab.st_rdev));
122 "usage: dumpon [-v] special_file\n"