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 * 4. 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
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
32 static const char copyright[] =
33 "@(#) Copyright (c) 1980, 1993\n\
34 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "From: @(#)swapon.c 8.1 (Berkeley) 6/5/93";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
46 #include <sys/sysctl.h>
64 fprintf(stderr, "%s\n%s\n%s\n",
65 "usage: dumpon [-v] special_file",
72 check_size(int fd, const char *fn)
74 int name[] = { CTL_HW, HW_PHYSMEM };
75 size_t namelen = sizeof(name) / sizeof(*name);
76 unsigned long physmem;
81 len = sizeof(minidump);
82 if (sysctlbyname("debug.minidump", &minidump, &len, NULL, 0) == 0 &&
85 len = sizeof(physmem);
86 if (sysctl(name, namelen, &physmem, &len, NULL, 0) != 0)
87 err(EX_OSERR, "can't get memory size");
88 if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) != 0)
89 err(EX_OSERR, "%s: can't get size", fn);
90 if ((uintmax_t)mediasize < (uintmax_t)physmem) {
92 printf("%s is smaller than physical memory\n", fn);
100 char dumpdev[PATH_MAX];
102 const char *sysctlname = "kern.shutdown.dumpdevname";
104 len = sizeof(dumpdev);
105 if (sysctlbyname(sysctlname, &dumpdev, &len, NULL, 0) != 0) {
106 if (errno == ENOMEM) {
107 err(EX_OSERR, "Kernel returned too large of a buffer for '%s'\n",
110 err(EX_OSERR, "Sysctl get '%s'\n", sysctlname);
114 printf("kernel dumps on ");
116 if (strlen(dumpdev) == 0) {
117 printf("%s\n", _PATH_DEVNULL);
119 printf("%s\n", dumpdev);
124 main(int argc, char *argv[])
129 int do_listdumpdev = 0;
131 while ((ch = getopt(argc, argv, "lv")) != -1)
146 if (do_listdumpdev) {
154 if (strcmp(argv[0], "off") != 0) {
158 if (strncmp(argv[0], _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) {
161 i = snprintf(tmp, PATH_MAX, "%s%s", _PATH_DEV, argv[0]);
163 err(EX_OSERR, "%s", argv[0]);
164 } else if (i >= PATH_MAX) {
166 err(EX_DATAERR, "%s", argv[0]);
170 fd = open(dumpdev, O_RDONLY);
172 err(EX_OSFILE, "%s", dumpdev);
173 check_size(fd, dumpdev);
175 i = ioctl(fd, DIOCSKERNELDUMP, &u);
177 i = ioctl(fd, DIOCSKERNELDUMP, &u);
178 if (i == 0 && verbose)
179 printf("kernel dumps on %s\n", dumpdev);
181 fd = open(_PATH_DEVNULL, O_RDONLY);
183 err(EX_OSFILE, "%s", _PATH_DEVNULL);
185 i = ioctl(fd, DIOCSKERNELDUMP, &u);
186 if (i == 0 && verbose)
187 printf("kernel dumps disabled\n");
190 err(EX_OSERR, "ioctl(DIOCSKERNELDUMP)");