diff options
author | wollman <wollman@FreeBSD.org> | 1995-05-12 19:10:09 +0000 |
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committer | wollman <wollman@FreeBSD.org> | 1995-05-12 19:10:09 +0000 |
commit | 56ee935a6308c4852acc11d2cad634c47d8dcdae (patch) | |
tree | 778267fc4b4f074c491114857c91aa98e1078552 /sbin/dumpon/dumpon.c | |
parent | c9a80054da053cb917f6bfd9dcfe98d7a3e669db (diff) | |
download | FreeBSD-src-56ee935a6308c4852acc11d2cad634c47d8dcdae.zip FreeBSD-src-56ee935a6308c4852acc11d2cad634c47d8dcdae.tar.gz |
My utility to specify where you want crash dumps to go. More user
and kernel support to follow.
Diffstat (limited to 'sbin/dumpon/dumpon.c')
-rw-r--r-- | sbin/dumpon/dumpon.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/sbin/dumpon/dumpon.c b/sbin/dumpon/dumpon.c new file mode 100644 index 0000000..649a73a --- /dev/null +++ b/sbin/dumpon/dumpon.c @@ -0,0 +1,129 @@ +/* + * 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[] = + "$Id$"; +#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")) != EOF) + 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); +} |