1 /* vi: set sw=4 ts=4: */
4 * dmesg - display/control kernel ring buffer.
6 * Copyright 2006 Rob Landley <rob@landley.net>
7 * Copyright 2006 Bernhard Fischer <rep.nop@aon.at>
9 * Licensed under GPLv2, see file LICENSE in this tarball for details.
16 int dmesg_main(int argc, char **argv);
17 int dmesg_main(int argc, char **argv)
20 int flags = getopt32(argc, argv, "cs:n:", &size, &level);
23 if (klogctl(8, NULL, xatoul_range(level, 0, 10)))
24 bb_perror_msg_and_die("klogctl");
29 len = (flags & 2) ? xatoul_range(size, 2, INT_MAX) : 16384;
31 if (0 > (len = klogctl(3 + (flags & 1), buf, len)))
32 bb_perror_msg_and_die("klogctl");
34 // Skip <#> at the start of lines, and make sure we end with a newline.
36 if (ENABLE_FEATURE_DMESG_PRETTY) {
40 for (in = 0; in<len;) {
41 if (last == '\n' && buf[in] == '<') in += 3;
42 else putchar(last = buf[in++]);
44 if (last != '\n') putchar('\n');
47 if (len && buf[len-1]!='\n') putchar('\n');
50 if (ENABLE_FEATURE_CLEAN_UP) free(buf);