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- /* dmesg.c -- Print out the contents of the kernel ring buffer
- * Created: Sat Oct 9 16:19:47 1993
- * Revised: Thu Oct 28 21:52:17 1993 by faith@cs.unc.edu
- * Copyright 1993 Theodore Ts'o (tytso@athena.mit.edu)
- * This program comes with ABSOLUTELY NO WARRANTY.
- * Modifications by Rick Sladkey (jrs@world.std.com)
- */
-
- #include <linux/unistd.h>
- #include <stdio.h>
- #include <getopt.h>
-
- #define __NR_klog __NR_syslog
-
- static inline _syscall3(int,klog,int,type,char *,b,int,len)
-
- static char *progname;
-
- usage()
- {
- fprintf( stderr, "Usage: %s [-c] [-n level]\n", progname );
- }
-
- int main( int argc, char *argv[] )
- {
- char buf[4096];
- int i;
- int n;
- int c;
- int level;
- int lastc;
- int cmd = 3;
-
- progname = argv[0];
- while ((c = getopt( argc, argv, "cn:" )) != EOF) {
- switch (c) {
- case 'c':
- cmd = 4;
- break;
- case 'n':
- cmd = 8;
- level = atoi(optarg);
- break;
- case '?':
- default:
- usage();
- exit(1);
- }
- }
- argc -= optind;
- argv += optind;
-
- if (argc > 1) {
- usage();
- exit(1);
- }
-
- if (cmd == 8) {
- n = klog( cmd, NULL, level );
- if (n < 0) {
- perror( "klog" );
- exit( 1 );
- }
- exit( 0 );
- }
-
- n = klog( cmd, buf, sizeof( buf ) );
- if (n < 0) {
- perror( "klog" );
- exit( 1 );
- }
-
- lastc = '\n';
- for (i = 0; i < n; i++) {
- if ((i == 0 || buf[i - 1] == '\n') && buf[i] == '<') {
- i++;
- while (buf[i] >= '0' && buf[i] <= '9')
- i++;
- if (buf[i] == '>')
- i++;
- }
- lastc = buf[i];
- putchar( lastc );
- }
- if (lastc != '\n')
- putchar( '\n' );
- return 0;
- }
-