1 /*-
2 * Copyright (c) 1998 Andrzej Bialecki <[email protected]>
3 * 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29 /*
30 * Small replacement for 'dmesg'. It doesn't need libkvm nor /dev/kmem.
31 */
32
33
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <sys/types.h>
37 #include <sys/sysctl.h>
38
39 int
main(int argc,char * argv[])40 main(int argc, char *argv[])
41 {
42 int len,i;
43 char *buf,*p;
44 char *mib="kern.msgbuf";
45
46 /* We use sysctlbyname, because the oid is unknown (OID_AUTO) */
47
48 /* get the buffer size */
49 i=sysctlbyname(mib,NULL,&len,NULL,0);
50 if(i) {
51 perror("buffer sizing");
52 exit(-1);
53 }
54 buf=(char *)malloc(len*sizeof(char));
55 i=sysctlbyname(mib,buf,&len,NULL,0);
56 if(i) {
57 perror("retrieving data");
58 exit(-1);
59 }
60 p=buf;
61 i=0;
62 while(p<(buf+len)) {
63 switch(*p) {
64 case '\0':
65 /* skip initial NULLs */
66 break;
67 default:
68 putchar(*p);
69 }
70 p++;
71 }
72 if(*--p!='\n') putchar('\n');
73 free(buf);
74 exit(0);
75 }
76