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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 Bernhard Fischer <rep.nop@aon.at>
*
* Licensed under GPLv2, see file LICENSE in this tarball for details.
*/
#include <sys/klog.h>
#include "libbb.h"
int dmesg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int dmesg_main(int argc, char **argv)
{
char *size, *level;
int flags = getopt32(argv, "cs:n:", &size, &level);
if (flags & 4) {
if (klogctl(8, NULL, xatoul_range(level, 0, 10)))
bb_perror_msg_and_die("klogctl");
} else {
int len;
char *buf;
len = (flags & 2) ? xatoul_range(size, 2, INT_MAX) : 16384;
buf = xmalloc(len);
if (0 > (len = klogctl(3 + (flags & 1), buf, len)))
bb_perror_msg_and_die("klogctl");
// Skip <#> at the start of lines, and make sure we end with a newline.
if (ENABLE_FEATURE_DMESG_PRETTY) {
int last = '\n';
int in;
for (in = 0; in<len;) {
if (last == '\n' && buf[in] == '<') in += 3;
else bb_putchar(last = buf[in++]);
}
if (last != '\n') bb_putchar('\n');
} else {
write(1,buf,len);
if (len && buf[len-1]!='\n') bb_putchar('\n');
}
if (ENABLE_FEATURE_CLEAN_UP) free(buf);
}
return 0;
}
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