1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "From: @(#)swapon.c 8.1 (Berkeley) 6/5/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <err.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <fcntl.h> 52 #include <paths.h> 53 #include <unistd.h> 54 #include <sys/param.h> 55 #include <sys/disk.h> 56 #include <sysexits.h> 57 58 void usage(void) __dead2; 59 60 int 61 main(int argc, char *argv[]) 62 { 63 int ch, verbose, rv; 64 int i, fd; 65 u_int u; 66 67 verbose = rv = 0; 68 while ((ch = getopt(argc, argv, "v")) != -1) 69 switch((char)ch) { 70 case 'v': 71 verbose = 1; 72 break; 73 case '?': 74 default: 75 usage(); 76 } 77 argv += optind; 78 79 if (!argv[0] || argv[1]) 80 usage(); 81 82 if (strcmp(argv[0], "off")) { 83 fd = open(argv[0], O_RDONLY); 84 if (fd < 0) 85 err(EX_OSFILE, "%s", argv[0]); 86 u = 0; 87 i = ioctl(fd, DIOCSKERNELDUMP, &u); 88 u = 1; 89 i = ioctl(fd, DIOCSKERNELDUMP, &u); 90 if (i == 0 && verbose) 91 printf("kernel dumps on %s\n", argv[0]); 92 93 } else { 94 fd = open(_PATH_DEVNULL, O_RDONLY); 95 if (fd < 0) 96 err(EX_OSFILE, "%s", _PATH_DEVNULL); 97 u = 0; 98 i = ioctl(fd, DIOCSKERNELDUMP, &u); 99 if (i == 0 && verbose) 100 printf("kernel dumps disabled\n"); 101 } 102 if (i < 0) 103 err(EX_OSERR, "ioctl(DIOCSKERNELDUMP)"); 104 105 exit (0); 106 } 107 108 void 109 usage(void) 110 { 111 fprintf(stderr, 112 "usage: dumpon [-v] special_file\n" 113 " dumpon [-v] off\n"); 114 exit(EX_USAGE); 115 } 116