mirror of
https://github.com/sheumann/hush.git
synced 2024-12-21 23:29:34 +00:00
81 lines
2.0 KiB
C
81 lines
2.0 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 <andersen@codepoet.org>. I ripped out Native Language
|
|
* Support, replaced getopt, added some gotos for redundant stuff.
|
|
*
|
|
* Audited and cleaned up on 7 March 2003 to reduce size of
|
|
* check error handling by Erik Andersen <andersen@codepoet.org>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <sys/klog.h>
|
|
|
|
#include "busybox.h"
|
|
|
|
int dmesg_main(int argc, char **argv)
|
|
{
|
|
char *buf, *tmp;
|
|
int bufsize = 8196;
|
|
int i, n = 0;
|
|
int c = 3;
|
|
|
|
i = bb_getopt_ulflags(argc, argv, "cn:s:", &buf, &tmp);
|
|
if (i & 1)
|
|
c = 4;
|
|
if (i & 2) {
|
|
c = 8;
|
|
n = bb_xgetlarg(buf, 10, 0, 10);
|
|
}
|
|
if (i & 4)
|
|
/* I think a 512k max kernel ring buffer is big enough for
|
|
* anybody, as the default is 16k... Could be wrong though.
|
|
* If so I'm sure I'll hear about it by the enraged masses*/
|
|
bufsize = bb_xgetlarg(tmp, 10, 4096, 512*1024);
|
|
|
|
if (c == 8) {
|
|
if (klogctl(c, NULL, n) < 0)
|
|
goto die_the_death;
|
|
goto all_done;
|
|
}
|
|
|
|
buf = xmalloc(bufsize);
|
|
if ((n = klogctl(c, buf, bufsize)) < 0)
|
|
goto die_the_death;
|
|
|
|
c = '\n';
|
|
for (i = 0; i < n; i++) {
|
|
if (c == '\n' && buf[i] == '<') {
|
|
i++;
|
|
while (buf[i] >= '0' && buf[i] <= '9')
|
|
i++;
|
|
if (buf[i] == '>')
|
|
i++;
|
|
}
|
|
c = buf[i];
|
|
putchar(c);
|
|
}
|
|
if (c != '\n')
|
|
putchar('\n');
|
|
all_done:
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
free(buf);
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
die_the_death:
|
|
bb_perror_nomsg_and_die();
|
|
}
|