1995-05-12 19:10:09 +00:00
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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2003-05-03 18:41:59 +00:00
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#if 0
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1995-05-12 19:10:09 +00:00
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#ifndef lint
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1998-06-15 07:03:47 +00:00
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static const char copyright[] =
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1995-05-12 19:10:09 +00:00
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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1998-06-15 07:03:47 +00:00
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static char sccsid[] = "From: @(#)swapon.c 8.1 (Berkeley) 6/5/93";
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1995-05-12 19:10:09 +00:00
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#endif /* not lint */
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2003-05-03 18:41:59 +00:00
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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1995-05-12 19:10:09 +00:00
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2004-10-03 23:38:49 +00:00
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#include <sys/param.h>
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#include <sys/disk.h>
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#include <sys/sysctl.h>
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1998-06-15 07:03:47 +00:00
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#include <err.h>
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2012-11-01 18:59:19 +00:00
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#include <errno.h>
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2002-03-31 22:24:24 +00:00
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#include <fcntl.h>
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#include <paths.h>
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2004-10-03 23:38:49 +00:00
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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2002-05-11 03:07:38 +00:00
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#include <string.h>
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1995-05-12 19:10:09 +00:00
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#include <sysexits.h>
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2004-10-03 23:38:49 +00:00
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#include <unistd.h>
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1995-05-12 19:10:09 +00:00
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2004-10-03 23:38:49 +00:00
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static int verbose;
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static void
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usage(void)
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{
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2012-11-01 18:59:19 +00:00
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fprintf(stderr, "%s\n%s\n%s\n",
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2004-10-03 23:38:49 +00:00
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"usage: dumpon [-v] special_file",
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2012-11-01 18:59:19 +00:00
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" dumpon [-v] off",
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2012-11-02 17:30:08 +00:00
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" dumpon [-v] -l");
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2004-10-03 23:38:49 +00:00
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exit(EX_USAGE);
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}
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static void
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check_size(int fd, const char *fn)
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{
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int name[] = { CTL_HW, HW_PHYSMEM };
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2006-10-31 22:36:49 +00:00
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size_t namelen = sizeof(name) / sizeof(*name);
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2004-10-03 23:38:49 +00:00
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unsigned long physmem;
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2006-04-27 19:01:54 +00:00
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size_t len;
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2004-10-03 23:38:49 +00:00
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off_t mediasize;
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2006-04-27 19:01:54 +00:00
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int minidump;
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2004-10-03 23:38:49 +00:00
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2006-10-31 22:36:49 +00:00
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len = sizeof(minidump);
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2006-04-27 19:01:54 +00:00
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if (sysctlbyname("debug.minidump", &minidump, &len, NULL, 0) == 0 &&
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minidump == 1)
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return;
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2006-10-31 22:36:49 +00:00
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len = sizeof(physmem);
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2004-10-03 23:38:49 +00:00
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if (sysctl(name, namelen, &physmem, &len, NULL, 0) != 0)
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err(EX_OSERR, "can't get memory size");
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if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) != 0)
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err(EX_OSERR, "%s: can't get size", fn);
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2004-10-04 06:54:19 +00:00
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if ((uintmax_t)mediasize < (uintmax_t)physmem) {
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2004-10-03 23:38:49 +00:00
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if (verbose)
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printf("%s is smaller than physical memory\n", fn);
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exit(EX_IOERR);
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}
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}
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1995-05-12 19:10:09 +00:00
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2012-11-01 18:59:19 +00:00
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static void
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listdumpdev(void)
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{
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char dumpdev[PATH_MAX];
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size_t len;
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const char *sysctlname = "kern.shutdown.dumpdevname";
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len = sizeof(dumpdev);
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if (sysctlbyname(sysctlname, &dumpdev, &len, NULL, 0) != 0) {
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if (errno == ENOMEM) {
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err(EX_OSERR, "Kernel returned too large of a buffer for '%s'\n",
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sysctlname);
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} else {
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err(EX_OSERR, "Sysctl get '%s'\n", sysctlname);
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}
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}
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if (verbose) {
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printf("kernel dumps on ");
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}
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if (strlen(dumpdev) == 0) {
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printf("%s\n", _PATH_DEVNULL);
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} else {
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printf("%s\n", dumpdev);
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}
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}
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1995-05-12 19:10:09 +00:00
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int
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2002-03-18 06:59:15 +00:00
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main(int argc, char *argv[])
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1995-05-12 19:10:09 +00:00
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{
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2004-10-03 23:38:49 +00:00
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int ch;
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2002-03-31 22:24:24 +00:00
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int i, fd;
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u_int u;
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2012-11-01 18:59:19 +00:00
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int do_listdumpdev = 0;
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1995-05-12 19:10:09 +00:00
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2012-11-01 18:59:19 +00:00
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while ((ch = getopt(argc, argv, "lv")) != -1)
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1995-05-12 19:10:09 +00:00
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switch((char)ch) {
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2012-11-01 18:59:19 +00:00
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case 'l':
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do_listdumpdev = 1;
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break;
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1995-05-12 19:10:09 +00:00
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case 'v':
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verbose = 1;
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break;
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default:
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usage();
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}
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2004-10-03 23:38:49 +00:00
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argc -= optind;
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1995-05-12 19:10:09 +00:00
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argv += optind;
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2012-11-01 18:59:19 +00:00
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if (do_listdumpdev) {
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listdumpdev();
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exit(EX_OK);
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}
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2004-10-03 23:38:49 +00:00
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if (argc != 1)
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1995-05-12 19:10:09 +00:00
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usage();
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2004-10-03 23:38:49 +00:00
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if (strcmp(argv[0], "off") != 0) {
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2015-11-23 14:06:21 +00:00
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char tmp[PATH_MAX];
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char *dumpdev;
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if (strncmp(argv[0], _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) {
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dumpdev = argv[0];
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} else {
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i = snprintf(tmp, PATH_MAX, "%s%s", _PATH_DEV, argv[0]);
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if (i < 0) {
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err(EX_OSERR, "%s", argv[0]);
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} else if (i >= PATH_MAX) {
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errno = EINVAL;
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err(EX_DATAERR, "%s", argv[0]);
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}
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dumpdev = tmp;
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}
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fd = open(dumpdev, O_RDONLY);
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2002-03-31 22:24:24 +00:00
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if (fd < 0)
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2015-11-23 14:06:21 +00:00
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err(EX_OSFILE, "%s", dumpdev);
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check_size(fd, dumpdev);
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2002-03-31 22:24:24 +00:00
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u = 0;
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2002-04-09 10:04:09 +00:00
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i = ioctl(fd, DIOCSKERNELDUMP, &u);
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2002-03-31 22:24:24 +00:00
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u = 1;
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2002-04-09 10:04:09 +00:00
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i = ioctl(fd, DIOCSKERNELDUMP, &u);
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2002-03-31 22:24:24 +00:00
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if (i == 0 && verbose)
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2015-11-23 14:06:21 +00:00
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printf("kernel dumps on %s\n", dumpdev);
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1995-05-12 19:10:09 +00:00
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} else {
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2002-03-31 22:24:24 +00:00
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fd = open(_PATH_DEVNULL, O_RDONLY);
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if (fd < 0)
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err(EX_OSFILE, "%s", _PATH_DEVNULL);
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u = 0;
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2002-04-09 10:04:09 +00:00
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i = ioctl(fd, DIOCSKERNELDUMP, &u);
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2002-03-31 22:24:24 +00:00
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if (i == 0 && verbose)
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printf("kernel dumps disabled\n");
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1995-05-12 19:10:09 +00:00
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}
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2002-03-31 22:24:24 +00:00
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if (i < 0)
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2002-04-09 10:04:09 +00:00
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err(EX_OSERR, "ioctl(DIOCSKERNELDUMP)");
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1995-05-12 19:10:09 +00:00
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2002-03-31 22:24:24 +00:00
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exit (0);
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1995-05-12 19:10:09 +00:00
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}
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