128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/*
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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#ifndef lint
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static const char copyright[] =
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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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#if 0
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static char sccsid[] = "From: @(#)swapon.c 8.1 (Berkeley) 6/5/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/stat.h>
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#include <sysexits.h>
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void usage __P((void)) __dead2;
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int
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main(int argc, char **argv)
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{
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int ch, verbose, rv;
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struct stat stab;
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int mib[2];
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verbose = rv = 0;
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while ((ch = getopt(argc, argv, "v")) != -1)
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switch((char)ch) {
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case 'v':
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verbose = 1;
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break;
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case '?':
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default:
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usage();
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}
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argv += optind;
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if (!argv[0] || argv[1])
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usage();
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if (strcmp(argv[0], "off")) {
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rv = stat(argv[0], &stab);
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if (rv) {
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err(EX_OSFILE, "%s", argv[0]);
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}
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if (!S_ISCHR(stab.st_mode)) {
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errx(EX_USAGE,
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"%s: must specify a character disk device",
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argv[0]);
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}
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} else {
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stab.st_rdev = NODEV;
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}
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mib[0] = CTL_KERN;
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mib[1] = KERN_DUMPDEV;
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rv = sysctl(mib, 2, (void *)0, (size_t *)0, &stab.st_rdev,
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sizeof stab.st_rdev);
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if (rv) {
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err(EX_OSERR, "sysctl: kern.dumpdev");
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}
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if (verbose) {
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if (stab.st_rdev == NODEV) {
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printf("dumpon: crash dumps disabled\n");
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} else {
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printf("dumpon: crash dumps to %s (%lu, %lu)\n",
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argv[0],
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(unsigned long)major(stab.st_rdev),
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(unsigned long)minor(stab.st_rdev));
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}
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}
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return 0;
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}
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void
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usage()
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{
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fprintf(stderr,
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"usage: dumpon [-v] special_file\n"
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" dumpon [-v] off\n");
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exit(EX_USAGE);
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}
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