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/* vi: set sw=4 ts=4: */
/*
* dmesg - display/control kernel ring buffer.
*
* Copyright 2006 Rob Landley <rob@landley.net>
* Copyright 2006 Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "busybox.h"
#include <unistd.h>
#include <sys/klog.h>
int dmesg_main(int argc, char *argv[])
{
char *size, *level;
int flags = bb_getopt_ulflags(argc, argv, "cs:n:", &size, &level);
if (flags & 4) {
if (klogctl(8, NULL, bb_xgetlarg(level, 10, 0, 10)))
bb_perror_msg_and_die("klogctl");
} else {
int len;
char *buf;
len = (flags & 2) ? bb_xgetlarg(size, 10, 2, INT_MAX) : 16384;
buf = xmalloc(len);
if (0 > (len = klogctl(3 + (flags & 1), buf, len)))
bb_perror_msg_and_die("klogctl");
#ifdef CONFIG_FEATURE_DMESG_PRETTY
{
char newline = '\n';
int i;
for (i=0; i<len; ++i) {
if (newline == '\n' && buf[i] == '<')
i += 3; /* skip <#> */
putchar(newline=buf[i]);
}
if (newline != '\n') putchar('\n');
}
#else
write(1, buf, len);
if (len && buf[len-1]!='\n') putchar('\n');
#endif
if (ENABLE_FEATURE_CLEAN_UP) free(buf);
}
return 0;
}
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