1/* 2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights 7 * Reserved. This file contains Original Code and/or Modifications of 8 * Original Code as defined in and that are subject to the Apple Public 9 * Source License Version 1.0 (the 'License'). You may not use this file 10 * except in compliance with the License. Please obtain a copy of the 11 * License at http://www.apple.com/publicsource and read it before using 12 * this file. 13 * 14 * The Original Code and all software distributed under the License are 15 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 19 * License for the specific language governing rights and limitations 20 * under the License." 21 * 22 * @APPLE_LICENSE_HEADER_END@ 23 */ 24/*- 25 * Copyright (c) 1991, 1993 26 * The Regents of the University of California. All rights reserved. 27 * 28 * Redistribution and use in source and binary forms, with or without 29 * modification, are permitted provided that the following conditions 30 * are met: 31 * 1. Redistributions of source code must retain the above copyright 32 * notice, this list of conditions and the following disclaimer. 33 * 2. Redistributions in binary form must reproduce the above copyright 34 * notice, this list of conditions and the following disclaimer in the 35 * documentation and/or other materials provided with the distribution. 36 * 3. All advertising materials mentioning features or use of this software 37 * must display the following acknowledgement: 38 * This product includes software developed by the University of 39 * California, Berkeley and its contributors. 40 * 4. Neither the name of the University nor the names of its contributors 41 * may be used to endorse or promote products derived from this software 42 * without specific prior written permission. 43 * 44 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 45 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 52 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 53 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 54 * SUCH DAMAGE. 55 */ 56 57#include <stdio.h> 58#include <stdlib.h> 59#include <vis.h> 60#include <sys/sysctl.h> 61#include <libproc.h> 62 63void 64usage() { 65 (void)fprintf(stderr, "usage: sudo dmesg\n"); 66 exit(1); 67} 68 69int 70main(int argc, char **argv) { 71 char *msgbuf, *visbuf; 72 int msgbufsize; 73 size_t sysctlsize = sizeof(msgbufsize); 74 long data_size; 75 76 if (argc > 1) 77 usage(); 78 79 if (sysctlbyname("kern.msgbuf", &msgbufsize, &sysctlsize, NULL, 0)) { 80 perror("Unable to size kernel buffer"); 81 } 82 83 msgbuf = malloc(msgbufsize); 84 if (msgbuf == NULL) { 85 perror("Unable to allocate a message buffer"); 86 } 87 88 if ((data_size = proc_kmsgbuf(msgbuf, msgbufsize)) == 0){ 89 perror("Unable to obtain kernel buffer"); 90 usage(); 91 } 92 93 visbuf = malloc(data_size*4); 94 strvis(visbuf, msgbuf, 0); 95 printf("%s", visbuf); 96 free(visbuf); 97 free(msgbuf); 98 exit(0); 99} 100 101