mirror of
https://github.com/sheumann/hush.git
synced 2024-12-28 07:30:23 +00:00
109 lines
2.2 KiB
C
109 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/* 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)
|
|
* Larger buffersize 3 June 1998 by Nicolai Langfeldt, based on a patch
|
|
* by Peeter Joot. This was also suggested by John Hudson.
|
|
* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
|
|
* - added Native Language Support
|
|
*
|
|
* from util-linux -- adapted for busybox by
|
|
* Erik Andersen <andersee@debian.org>. I ripped out Native Language
|
|
* Support, replaced getopt, added some gotos for redundant stuff.
|
|
*/
|
|
|
|
#include "busybox.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#if __GNU_LIBRARY__ < 5
|
|
|
|
#ifndef __alpha__
|
|
# define __NR_klogctl __NR_syslog
|
|
static inline _syscall3(int, klogctl, int, type, char *, b, int, len);
|
|
#else /* __alpha__ */
|
|
#define klogctl syslog
|
|
#endif
|
|
|
|
#else
|
|
# include <sys/klog.h>
|
|
#endif
|
|
|
|
int dmesg_main(int argc, char **argv)
|
|
{
|
|
char *buf;
|
|
int c;
|
|
int bufsize = 8196;
|
|
int i;
|
|
int n;
|
|
int level = 0;
|
|
int lastc;
|
|
int cmd = 3;
|
|
|
|
while ((c = getopt(argc, argv, "cn:s:")) != EOF) {
|
|
switch (c) {
|
|
case 'c':
|
|
cmd = 4;
|
|
break;
|
|
case 'n':
|
|
cmd = 8;
|
|
if (optarg == NULL)
|
|
usage(dmesg_usage);
|
|
level = atoi(optarg);
|
|
break;
|
|
case 's':
|
|
if (optarg == NULL)
|
|
usage(dmesg_usage);
|
|
bufsize = atoi(optarg);
|
|
break;
|
|
default:
|
|
usage(dmesg_usage);
|
|
}
|
|
}
|
|
|
|
if (optind < argc) {
|
|
goto end;
|
|
}
|
|
|
|
if (cmd == 8) {
|
|
n = klogctl(cmd, NULL, level);
|
|
if (n < 0) {
|
|
goto klogctl_error;
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
if (bufsize < 4096)
|
|
bufsize = 4096;
|
|
buf = (char *) xmalloc(bufsize);
|
|
n = klogctl(cmd, buf, bufsize);
|
|
if (n < 0) {
|
|
goto klogctl_error;
|
|
}
|
|
|
|
lastc = '\n';
|
|
for (i = 0; i < n; i++) {
|
|
if (lastc == '\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 EXIT_SUCCESS;
|
|
end:
|
|
usage(dmesg_usage);
|
|
return EXIT_FAILURE;
|
|
klogctl_error:
|
|
perror("klogctl");
|
|
return EXIT_FAILURE;
|
|
}
|