1 /* vi: set sw=4 ts=4: */
3 * Mini klogd implementation for busybox
5 * Copyright (C) 2001 by Gennady Feldman <gfeldman@gena01.com>.
6 * Changes: Made this a standalone busybox module which uses standalone
7 * syslog() client interface.
9 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
11 * Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
13 * "circular buffer" Copyright (C) 2000 by Gennady Feldman <gfeldman@gena01.com>
15 * Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001
17 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
21 #include <sys/syslog.h>
24 static void klogd_signal(int sig ATTRIBUTE_UNUSED)
28 syslog(LOG_NOTICE, "Kernel log daemon exiting");
33 #define OPT_FOREGROUND 2
35 #define KLOGD_LOGBUF_SIZE BUFSIZ
36 #define log_buffer bb_common_bufsiz1
38 int klogd_main(int argc, char **argv);
39 int klogd_main(int argc, char **argv)
41 int i = i; /* silence gcc */
44 /* do normal option parsing */
45 getopt32(argc, argv, "c:n", &start);
47 if (option_mask32 & OPT_LEVEL) {
48 /* Valid levels are between 1 and 8 */
49 i = xatoul_range(start, 1, 8);
52 if (!(option_mask32 & OPT_FOREGROUND)) {
53 bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
56 openlog("kernel", 0, LOG_KERN);
58 /* Set up sig handlers */
59 signal(SIGINT, klogd_signal);
60 signal(SIGKILL, klogd_signal);
61 signal(SIGTERM, klogd_signal);
62 signal(SIGHUP, SIG_IGN);
64 /* "Open the log. Currently a NOP." */
67 /* Set level of kernel console messaging. */
68 if (option_mask32 & OPT_LEVEL)
71 syslog(LOG_NOTICE, "klogd started: %s", bb_banner);
73 /* Note: this code does not detect incomplete messages
74 * (messages not ending with '\n' or just when kernel
75 * generates too many messages for us to keep up)
76 * and will split them in two separate lines */
81 n = klogctl(2, log_buffer, KLOGD_LOGBUF_SIZE - 1);
85 syslog(LOG_ERR, "klogd: error from klogctl(2): %d - %m",
93 start = &log_buffer[i];
94 if (log_buffer[i] == '<') {
96 // kernel never ganerates multi-digit prios
98 //while (log_buffer[i] >= '0' && log_buffer[i] <= '9') {
99 // priority = priority * 10 + (log_buffer[i] - '0');
102 if (isdigit(log_buffer[i])) {
103 priority = (log_buffer[i] - '0');
106 if (log_buffer[i] == '>')
108 start = &log_buffer[i];
110 while (log_buffer[i] != '\n')
112 log_buffer[i] = '\0';
113 syslog(priority, "%s", start);