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