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76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/*-
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* Copyright (c) 1998 Andrzej Bialecki <abial@freebsd.org>
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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/*
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* Small replacement for 'dmesg'. It doesn't need libkvm nor /dev/kmem.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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int
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main(int argc, char *argv[])
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{
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int len,i;
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char *buf,*p;
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char *mib="kern.msgbuf";
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/* We use sysctlbyname, because the oid is unknown (OID_AUTO) */
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/* get the buffer size */
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i=sysctlbyname(mib,NULL,&len,NULL,0);
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if(i) {
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perror("buffer sizing");
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exit(-1);
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}
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buf=(char *)malloc(len*sizeof(char));
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i=sysctlbyname(mib,buf,&len,NULL,0);
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if(i) {
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perror("retrieving data");
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exit(-1);
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}
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p=buf;
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i=0;
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while(p<(buf+len)) {
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switch(*p) {
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case '\0':
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/* skip initial NULLs */
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break;
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default:
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putchar(*p);
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}
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p++;
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}
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if(*--p!='\n') putchar('\n');
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free(buf);
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exit(0);
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}
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