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#include "internal.h"
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
/* 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)
* from util-linux; adapted for busybox
*/
#include <linux/unistd.h>
#include <stdio.h>
#define __NR_klog __NR_syslog
#if defined(__GLIBC__)
#include <sys/klog.h>
#define klog klogctl
#else
static inline _syscall3 (int, klog, int, type, char *, b, int, len)
#endif /* __GLIBC__ */
static const char dmesg_usage[] = "dmesg [-c] [-n level]\n";
int dmesg_main (int argc, char **argv)
{
char buf[4096];
int i;
int n;
int level = 0;
int lastc;
int cmd = 3;
argc--;
argv++;
/* Parse any options */
while (argc && **argv == '-') {
while (*++(*argv))
switch (**argv) {
case 'c':
cmd = 4;
break;
case 'n':
cmd = 8;
if (--argc == 0)
goto end;
level = atoi (*(++argv));
--argc;
++argv;
break;
default:
goto end;
}
}
if (cmd == 8) {
n = klog (cmd, NULL, level);
if (n < 0) {
perror ("klog");
exit (FALSE);
}
exit (TRUE);
}
n = klog (cmd, buf, sizeof (buf));
if (n < 0) {
perror ("klog");
exit (FALSE);
}
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');
exit (TRUE);
end:
fprintf (stderr, "Usage: %s\n", dmesg_usage);
exit (FALSE);
}
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