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/*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*/
#ifndef lint
static 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";*/
static const char rcsid[] =
"$Id: dumpon.c,v 1.4 1997/02/22 14:32:22 peter Exp $";
#endif /* not lint */
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/stat.h>
#include <sysexits.h>
#include <err.h>
void usage __P((void)) __dead2;
static char *whoami;
int
main(int argc, char **argv)
{
extern char *optarg;
extern int optind;
int ch, verbose, rv;
struct stat stab;
int mib[2];
verbose = rv = 0;
whoami = argv[0];
while ((ch = getopt(argc, argv, "v")) != -1)
switch((char)ch) {
case 'v':
verbose = 1;
break;
case '?':
default:
usage();
}
argv += optind;
if (!argv[0] || argv[1])
usage();
if (strcmp(argv[0], "off")) {
rv = stat(argv[0], &stab);
if (rv) {
err(EX_OSFILE, "%s", argv[0]);
}
if (!S_ISBLK(stab.st_mode)) {
errx(EX_USAGE, "%s: must specify a block device",
argv[0]);
}
} else {
stab.st_rdev = NODEV;
}
mib[0] = CTL_KERN;
mib[1] = KERN_DUMPDEV;
rv = sysctl(mib, 2, (void *)0, (size_t *)0, &stab.st_rdev,
sizeof stab.st_rdev);
if (rv) {
err(EX_OSERR, "sysctl: kern.dumpdev");
}
if (verbose) {
if (stab.st_rdev == NODEV) {
printf("%s: crash dumps disabled\n", whoami);
} else {
printf("%s: crash dumps to %s (%lu, %lu)\n",
whoami, argv[0],
(unsigned long)major(stab.st_rdev),
(unsigned long)minor(stab.st_rdev));
}
}
return 0;
}
void
usage()
{
fprintf(stderr,
"usage: %s [-v] special_file\n"
" %s [-v] off\n", whoami, whoami);
exit(EX_USAGE);
}
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