mirror of
https://github.com/sheumann/hush.git
synced 2024-08-27 03:29:05 +00:00
99 lines
1.8 KiB
C
99 lines
1.8 KiB
C
#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);
|
|
}
|