9e9c1cad4c
Caveats: The new savecore program is not complete in the sense that it emulates enough of the old savecores features to do the job, but implements none of the options yet. I would appreciate if a userland hacker could help me out getting savecore to do what we want it to do from a users point of view, compression, email-notification, space reservation etc etc. (send me email if you are interested). Currently, savecore will scan all devices marked as "swap" or "dump" in /etc/fstab _or_ any devices specified on the command-line. All architectures but i386 lack an implementation of dumpsys(), but looking at the i386 version it should be trivial for anybody familiar with the platform(s) to provide this function. Documentation is quite sparse at this time, more to come. Sponsored by: DARPA, NAI Labs Details: Dumpon now opens the device and uses ioctl(DIOCGKERNELDUMP) to set it to be the dumpdevice. When "off" is set, /dev/null is used.
116 lines
3.3 KiB
C
116 lines
3.3 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 <fcntl.h>
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#include <paths.h>
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#include <unistd.h>
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <sysexits.h>
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void usage(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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int i, fd;
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u_int u;
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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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fd = open(argv[0], O_RDONLY);
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if (fd < 0)
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err(EX_OSFILE, "%s", argv[0]);
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u = 0;
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i = ioctl(fd, DIOCGKERNELDUMP, &u);
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u = 1;
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i = ioctl(fd, DIOCGKERNELDUMP, &u);
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if (i == 0 && verbose)
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printf("kernel dumps on %s\n", argv[0]);
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} else {
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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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i = ioctl(fd, DIOCGKERNELDUMP, &u);
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if (i == 0 && verbose)
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printf("kernel dumps disabled\n");
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}
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if (i < 0)
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err(EX_OSERR, "ioctl(DIOCGKERNELDUMP)");
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exit (0);
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}
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void
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usage(void)
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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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