Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 | /* vi: set sw=4 ts=4: */ /* * Mini klogd implementation for busybox * * Copyright (C) 2001 by Gennady Feldman <gfeldman@gena01.com>. * Changes: Made this a standalone busybox module which uses standalone * syslog() client interface. * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> * * Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org> * * "circular buffer" Copyright (C) 2000 by Gennady Feldman <gfeldman@gena01.com> * * Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001 * * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. */ #include "libbb.h" #include <sys/syslog.h> #include <sys/klog.h> static void klogd_signal(int sig ATTRIBUTE_UNUSED) { klogctl(7, NULL, 0); klogctl(0, 0, 0); syslog(LOG_NOTICE, "Kernel log daemon exiting"); exit(EXIT_SUCCESS); } #define OPT_LEVEL 1 #define OPT_FOREGROUND 2 #define KLOGD_LOGBUF_SIZE BUFSIZ #define log_buffer bb_common_bufsiz1 int klogd_main(int argc, char **argv); int klogd_main(int argc, char **argv) { int i = i; /* silence gcc */ char *start; /* do normal option parsing */ getopt32(argv, "c:n", &start); if (option_mask32 & OPT_LEVEL) { /* Valid levels are between 1 and 8 */ i = xatoul_range(start, 1, 8); } if (!(option_mask32 & OPT_FOREGROUND)) { bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv); } openlog("kernel", 0, LOG_KERN); /* Set up sig handlers */ signal(SIGINT, klogd_signal); signal(SIGKILL, klogd_signal); signal(SIGTERM, klogd_signal); signal(SIGHUP, SIG_IGN); /* "Open the log. Currently a NOP." */ klogctl(1, NULL, 0); /* Set level of kernel console messaging. */ if (option_mask32 & OPT_LEVEL) klogctl(8, NULL, i); syslog(LOG_NOTICE, "klogd started: %s", bb_banner); /* Note: this code does not detect incomplete messages * (messages not ending with '\n' or just when kernel * generates too many messages for us to keep up) * and will split them in two separate lines */ while (1) { int n; int priority; n = klogctl(2, log_buffer, KLOGD_LOGBUF_SIZE - 1); if (n < 0) { if (errno == EINTR) continue; syslog(LOG_ERR, "klogd: error from klogctl(2): %d - %m", errno); break; } log_buffer[n] = '\n'; i = 0; while (i < n) { priority = LOG_INFO; start = &log_buffer[i]; if (log_buffer[i] == '<') { i++; // kernel never ganerates multi-digit prios //priority = 0; //while (log_buffer[i] >= '0' && log_buffer[i] <= '9') { // priority = priority * 10 + (log_buffer[i] - '0'); // i++; //} if (isdigit(log_buffer[i])) { priority = (log_buffer[i] - '0'); i++; } if (log_buffer[i] == '>') i++; start = &log_buffer[i]; } while (log_buffer[i] != '\n') i++; log_buffer[i] = '\0'; syslog(priority, "%s", start); i++; } } return EXIT_FAILURE; } |