1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini syslogd implementation for busybox
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4 | *
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5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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6 | *
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7 | * Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
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8 | *
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9 | * "circular buffer" Copyright (C) 2001 by Gennady Feldman <gfeldman@gena01.com>
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10 | *
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11 | * Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001
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12 | *
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13 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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14 | */
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15 |
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16 | #include "busybox.h"
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17 | #include <stdio.h>
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18 | #include <stdlib.h>
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19 | #include <ctype.h>
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20 | #include <errno.h>
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21 | #include <fcntl.h>
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22 | #include <getopt.h>
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23 | #include <netdb.h>
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24 | #include <paths.h>
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25 | #include <signal.h>
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26 | #include <stdarg.h>
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27 | #include <stdbool.h>
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28 | #include <time.h>
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29 | #include <string.h>
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30 | #include <unistd.h>
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31 | #include <sys/socket.h>
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32 | #include <sys/types.h>
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33 | #include <sys/un.h>
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34 | #include <sys/param.h>
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35 |
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36 | /* SYSLOG_NAMES defined to pull some extra junk from syslog.h */
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37 | #define SYSLOG_NAMES
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38 | #include <sys/syslog.h>
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39 | #include <sys/uio.h>
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40 |
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41 | /* Path for the file where all log messages are written */
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42 | #define __LOG_FILE "/var/log/messages"
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43 |
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44 | /* Path to the unix socket */
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45 | static char lfile[MAXPATHLEN];
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46 |
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47 | static const char *logFilePath = __LOG_FILE;
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48 |
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49 | #ifdef CONFIG_FEATURE_ROTATE_LOGFILE
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50 | /* max size of message file before being rotated */
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51 | static int logFileSize = 200 * 1024;
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52 |
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53 | /* number of rotated message files */
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54 | static int logFileRotate = 1;
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55 | #endif
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56 |
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57 | /* interval between marks in seconds */
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58 | static int MarkInterval = 20 * 60;
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59 |
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60 | /* localhost's name */
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61 | static char LocalHostName[64];
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62 |
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63 | #ifdef CONFIG_FEATURE_REMOTE_LOG
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64 | #include <netinet/in.h>
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65 | /* udp socket for logging to remote host */
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66 | static int remotefd = -1;
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67 | static struct sockaddr_in remoteaddr;
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68 |
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69 | /* where do we log? */
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70 | static char *RemoteHost;
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71 |
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72 | /* what port to log to? */
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73 | static int RemotePort = 514;
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74 |
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75 | /* To remote log or not to remote log, that is the question. */
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76 | static int doRemoteLog = FALSE;
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77 | static int local_logging = FALSE;
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78 | #endif
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79 |
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80 | /* Make loging output smaller. */
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81 | static bool small = false;
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82 |
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83 |
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84 | #define MAXLINE 1024 /* maximum line length */
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85 |
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86 |
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87 | /* circular buffer variables/structures */
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88 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
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89 |
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90 | #if CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE < 4
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91 | #error Sorry, you must set the syslogd buffer size to at least 4KB.
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92 | #error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
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93 | #endif
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94 |
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95 | #include <sys/ipc.h>
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96 | #include <sys/sem.h>
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97 | #include <sys/shm.h>
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98 |
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99 | /* our shared key */
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100 | static const long KEY_ID = 0x414e4547; /*"GENA" */
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101 |
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102 | // Semaphore operation structures
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103 | static struct shbuf_ds {
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104 | int size; // size of data written
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105 | int head; // start of message list
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106 | int tail; // end of message list
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107 | char data[1]; // data/messages
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108 | } *buf = NULL; // shared memory pointer
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109 |
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110 | static struct sembuf SMwup[1] = { {1, -1, IPC_NOWAIT} }; // set SMwup
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111 | static struct sembuf SMwdn[3] = { {0, 0}, {1, 0}, {1, +1} }; // set SMwdn
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112 |
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113 | static int shmid = -1; // ipc shared memory id
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114 | static int s_semid = -1; // ipc semaphore id
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115 | static int shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024); // default shm size
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116 | static int circular_logging = FALSE;
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117 |
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118 | /*
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119 | * sem_up - up()'s a semaphore.
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120 | */
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121 | static inline void sem_up(int semid)
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122 | {
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123 | if (semop(semid, SMwup, 1) == -1) {
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124 | bb_perror_msg_and_die("semop[SMwup]");
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125 | }
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126 | }
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127 |
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128 | /*
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129 | * sem_down - down()'s a semaphore
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130 | */
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131 | static inline void sem_down(int semid)
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132 | {
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133 | if (semop(semid, SMwdn, 3) == -1) {
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134 | bb_perror_msg_and_die("semop[SMwdn]");
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135 | }
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136 | }
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137 |
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138 |
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139 | static void ipcsyslog_cleanup(void)
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140 | {
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141 | printf("Exiting Syslogd!\n");
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142 | if (shmid != -1) {
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143 | shmdt(buf);
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144 | }
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145 |
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146 | if (shmid != -1) {
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147 | shmctl(shmid, IPC_RMID, NULL);
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148 | }
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149 | if (s_semid != -1) {
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150 | semctl(s_semid, 0, IPC_RMID, 0);
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151 | }
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152 | }
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153 |
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154 | static void ipcsyslog_init(void)
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155 | {
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156 | if (buf == NULL) {
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157 | if ((shmid = shmget(KEY_ID, shm_size, IPC_CREAT | 1023)) == -1) {
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158 | bb_perror_msg_and_die("shmget");
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159 | }
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160 |
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161 | if ((buf = shmat(shmid, NULL, 0)) == NULL) {
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162 | bb_perror_msg_and_die("shmat");
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163 | }
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164 |
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165 | buf->size = shm_size - sizeof(*buf);
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166 | buf->head = buf->tail = 0;
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167 |
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168 | // we'll trust the OS to set initial semval to 0 (let's hope)
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169 | if ((s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023)) == -1) {
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170 | if (errno == EEXIST) {
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171 | if ((s_semid = semget(KEY_ID, 2, 0)) == -1) {
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172 | bb_perror_msg_and_die("semget");
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173 | }
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174 | } else {
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175 | bb_perror_msg_and_die("semget");
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176 | }
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177 | }
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178 | } else {
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179 | printf("Buffer already allocated just grab the semaphore?");
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180 | }
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181 | }
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182 |
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183 | /* write message to buffer */
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184 | static void circ_message(const char *msg)
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185 | {
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186 | int l = strlen(msg) + 1; /* count the whole message w/ '\0' included */
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187 |
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188 | sem_down(s_semid);
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189 |
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190 | /*
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191 | * Circular Buffer Algorithm:
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192 | * --------------------------
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193 | *
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194 | * Start-off w/ empty buffer of specific size SHM_SIZ
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195 | * Start filling it up w/ messages. I use '\0' as separator to break up messages.
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196 | * This is also very handy since we can do printf on message.
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197 | *
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198 | * Once the buffer is full we need to get rid of the first message in buffer and
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199 | * insert the new message. (Note: if the message being added is >1 message then
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200 | * we will need to "remove" >1 old message from the buffer). The way this is done
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201 | * is the following:
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202 | * When we reach the end of the buffer we set a mark and start from the beginning.
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203 | * Now what about the beginning and end of the buffer? Well we have the "head"
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204 | * index/pointer which is the starting point for the messages and we have "tail"
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205 | * index/pointer which is the ending point for the messages. When we "display" the
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206 | * messages we start from the beginning and continue until we reach "tail". If we
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207 | * reach end of buffer, then we just start from the beginning (offset 0). "head" and
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208 | * "tail" are actually offsets from the beginning of the buffer.
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209 | *
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210 | * Note: This algorithm uses Linux IPC mechanism w/ shared memory and semaphores to provide
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211 | * a threadsafe way of handling shared memory operations.
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212 | */
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213 | if ((buf->tail + l) < buf->size) {
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214 | /* before we append the message we need to check the HEAD so that we won't
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215 | overwrite any of the message that we still need and adjust HEAD to point
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216 | to the next message! */
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217 | if (buf->tail < buf->head) {
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218 | if ((buf->tail + l) >= buf->head) {
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219 | /* we need to move the HEAD to point to the next message
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220 | * Theoretically we have enough room to add the whole message to the
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221 | * buffer, because of the first outer IF statement, so we don't have
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222 | * to worry about overflows here!
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223 | */
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224 | int k = buf->tail + l - buf->head; /* we need to know how many bytes
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225 | we are overwriting to make
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226 | enough room */
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227 | char *c =
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228 | memchr(buf->data + buf->head + k, '\0',
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229 | buf->size - (buf->head + k));
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230 | if (c != NULL) { /* do a sanity check just in case! */
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231 | buf->head = c - buf->data + 1; /* we need to convert pointer to
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232 | offset + skip the '\0' since
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233 | we need to point to the beginning
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234 | of the next message */
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235 | /* Note: HEAD is only used to "retrieve" messages, it's not used
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236 | when writing messages into our buffer */
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237 | } else { /* show an error message to know we messed up? */
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238 | printf("Weird! Can't find the terminator token?\n");
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239 | buf->head = 0;
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240 | }
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241 | }
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242 | }
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243 |
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244 | /* in other cases no overflows have been done yet, so we don't care! */
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245 | /* we should be ok to append the message now */
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246 | strncpy(buf->data + buf->tail, msg, l); /* append our message */
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247 | buf->tail += l; /* count full message w/ '\0' terminating char */
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248 | } else {
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249 | /* we need to break up the message and "circle" it around */
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250 | char *c;
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251 | int k = buf->tail + l - buf->size; /* count # of bytes we don't fit */
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252 |
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253 | /* We need to move HEAD! This is always the case since we are going
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254 | * to "circle" the message.
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255 | */
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256 | c = memchr(buf->data + k, '\0', buf->size - k);
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257 |
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258 | if (c != NULL) { /* if we don't have '\0'??? weird!!! */
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259 | /* move head pointer */
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260 | buf->head = c - buf->data + 1;
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261 |
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262 | /* now write the first part of the message */
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263 | strncpy(buf->data + buf->tail, msg, l - k - 1);
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264 |
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265 | /* ALWAYS terminate end of buffer w/ '\0' */
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266 | buf->data[buf->size - 1] = '\0';
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267 |
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268 | /* now write out the rest of the string to the beginning of the buffer */
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269 | strcpy(buf->data, &msg[l - k - 1]);
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270 |
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271 | /* we need to place the TAIL at the end of the message */
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272 | buf->tail = k + 1;
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273 | } else {
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274 | printf
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275 | ("Weird! Can't find the terminator token from the beginning?\n");
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276 | buf->head = buf->tail = 0; /* reset buffer, since it's probably corrupted */
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277 | }
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278 |
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279 | }
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280 | sem_up(s_semid);
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281 | }
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282 | #endif /* CONFIG_FEATURE_IPC_SYSLOG */
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283 |
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284 | /* Note: There is also a function called "message()" in init.c */
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285 | /* Print a message to the log file. */
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286 | static void message(char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
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287 | static void message(char *fmt, ...)
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288 | {
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289 | int fd;
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290 | struct flock fl;
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291 | va_list arguments;
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292 |
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293 | fl.l_whence = SEEK_SET;
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294 | fl.l_start = 0;
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295 | fl.l_len = 1;
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296 |
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297 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
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298 | if ((circular_logging == TRUE) && (buf != NULL)) {
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299 | char b[1024];
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300 |
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301 | va_start(arguments, fmt);
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302 | vsnprintf(b, sizeof(b) - 1, fmt, arguments);
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303 | va_end(arguments);
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304 | circ_message(b);
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305 |
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306 | } else
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307 | #endif
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308 | if ((fd = device_open(logFilePath,
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309 | O_WRONLY | O_CREAT | O_NOCTTY | O_APPEND |
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310 | O_NONBLOCK)) >= 0) {
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311 | fl.l_type = F_WRLCK;
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312 | fcntl(fd, F_SETLKW, &fl);
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313 | #ifdef CONFIG_FEATURE_ROTATE_LOGFILE
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314 | if ( logFileSize > 0 ) {
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315 | struct stat statf;
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316 | int r = fstat(fd, &statf);
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317 | if( !r && (statf.st_mode & S_IFREG)
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318 | && (lseek(fd,0,SEEK_END) > logFileSize) ) {
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319 | if(logFileRotate > 0) {
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320 | int i;
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321 | char oldFile[(strlen(logFilePath)+4)], newFile[(strlen(logFilePath)+4)];
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322 | for(i=logFileRotate-1;i>0;i--) {
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323 | sprintf(oldFile, "%s.%d", logFilePath, i-1);
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324 | sprintf(newFile, "%s.%d", logFilePath, i);
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325 | rename(oldFile, newFile);
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326 | }
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327 | sprintf(newFile, "%s.%d", logFilePath, 0);
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328 | fl.l_type = F_UNLCK;
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329 | fcntl (fd, F_SETLKW, &fl);
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330 | close(fd);
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331 | rename(logFilePath, newFile);
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332 | fd = device_open (logFilePath,
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333 | O_WRONLY | O_CREAT | O_NOCTTY | O_APPEND |
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334 | O_NONBLOCK);
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335 | fl.l_type = F_WRLCK;
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336 | fcntl (fd, F_SETLKW, &fl);
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337 | } else {
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338 | ftruncate( fd, 0 );
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339 | }
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340 | }
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341 | }
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342 | #endif
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343 | va_start(arguments, fmt);
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344 | vdprintf(fd, fmt, arguments);
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345 | va_end(arguments);
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346 | fl.l_type = F_UNLCK;
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347 | fcntl(fd, F_SETLKW, &fl);
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348 | close(fd);
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349 | } else {
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350 | /* Always send console messages to /dev/console so people will see them. */
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351 | if ((fd = device_open(_PATH_CONSOLE,
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352 | O_WRONLY | O_NOCTTY | O_NONBLOCK)) >= 0) {
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353 | va_start(arguments, fmt);
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354 | vdprintf(fd, fmt, arguments);
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355 | va_end(arguments);
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356 | close(fd);
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357 | } else {
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358 | fprintf(stderr, "Bummer, can't print: ");
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359 | va_start(arguments, fmt);
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360 | vfprintf(stderr, fmt, arguments);
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361 | fflush(stderr);
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362 | va_end(arguments);
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363 | }
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364 | }
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365 | }
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366 |
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367 | #ifdef CONFIG_FEATURE_REMOTE_LOG
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368 | static void init_RemoteLog(void)
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369 | {
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370 | memset(&remoteaddr, 0, sizeof(remoteaddr));
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371 | remotefd = bb_xsocket(AF_INET, SOCK_DGRAM, 0);
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372 | remoteaddr.sin_family = AF_INET;
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373 | remoteaddr.sin_addr = *(struct in_addr *) *(xgethostbyname(RemoteHost))->h_addr_list;
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374 | remoteaddr.sin_port = htons(RemotePort);
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375 | }
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376 | #endif
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377 |
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378 | static void logMessage(int pri, char *msg)
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379 | {
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380 | time_t now;
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381 | char *timestamp;
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382 | static char res[20];
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383 | #ifdef CONFIG_FEATURE_REMOTE_LOG
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384 | static char line[MAXLINE + 1];
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385 | #endif
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386 | CODE *c_pri, *c_fac;
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387 |
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388 | if (pri != 0) {
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389 | for (c_fac = facilitynames;
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390 | c_fac->c_name && !(c_fac->c_val == LOG_FAC(pri) << 3); c_fac++);
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391 | for (c_pri = prioritynames;
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392 | c_pri->c_name && !(c_pri->c_val == LOG_PRI(pri)); c_pri++);
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393 | if (c_fac->c_name == NULL || c_pri->c_name == NULL) {
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394 | snprintf(res, sizeof(res), "<%d>", pri);
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395 | } else {
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396 | snprintf(res, sizeof(res), "%s.%s", c_fac->c_name, c_pri->c_name);
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397 | }
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398 | }
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399 |
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400 | if (strlen(msg) < 16 || msg[3] != ' ' || msg[6] != ' ' ||
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401 | msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') {
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402 | time(&now);
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403 | timestamp = ctime(&now) + 4;
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404 | timestamp[15] = '\0';
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405 | } else {
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406 | timestamp = msg;
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407 | timestamp[15] = '\0';
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408 | msg += 16;
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409 | }
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410 |
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411 | /* todo: supress duplicates */
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412 |
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413 | #ifdef CONFIG_FEATURE_REMOTE_LOG
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414 | if (doRemoteLog == TRUE) {
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415 | /* trying connect the socket */
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416 | if (-1 == remotefd) {
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417 | init_RemoteLog();
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418 | }
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419 |
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420 | /* if we have a valid socket, send the message */
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421 | if (-1 != remotefd) {
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422 | now = 1;
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423 | snprintf(line, sizeof(line), "<%d>%s", pri, msg);
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424 |
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425 | retry:
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426 | /* send message to remote logger */
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427 | if(( -1 == sendto(remotefd, line, strlen(line), 0,
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428 | (struct sockaddr *) &remoteaddr,
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429 | sizeof(remoteaddr))) && (errno == EINTR)) {
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430 | /* sleep now seconds and retry (with now * 2) */
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431 | sleep(now);
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432 | now *= 2;
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433 | goto retry;
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434 | }
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435 | }
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436 | }
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437 |
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438 | if (local_logging == TRUE)
|
---|
439 | #endif
|
---|
440 | {
|
---|
441 | /* now spew out the message to wherever it is supposed to go */
|
---|
442 | if (small)
|
---|
443 | message("%s %s\n", timestamp, msg);
|
---|
444 | else
|
---|
445 | message("%s %s %s %s\n", timestamp, LocalHostName, res, msg);
|
---|
446 | }
|
---|
447 | }
|
---|
448 |
|
---|
449 | static void quit_signal(int sig)
|
---|
450 | {
|
---|
451 | logMessage(LOG_SYSLOG | LOG_INFO, "System log daemon exiting.");
|
---|
452 | unlink(lfile);
|
---|
453 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
|
---|
454 | ipcsyslog_cleanup();
|
---|
455 | #endif
|
---|
456 |
|
---|
457 | exit(TRUE);
|
---|
458 | }
|
---|
459 |
|
---|
460 | static void domark(int sig)
|
---|
461 | {
|
---|
462 | if (MarkInterval > 0) {
|
---|
463 | logMessage(LOG_SYSLOG | LOG_INFO, "-- MARK --");
|
---|
464 | alarm(MarkInterval);
|
---|
465 | }
|
---|
466 | }
|
---|
467 |
|
---|
468 | /* This must be a #define, since when CONFIG_DEBUG and BUFFERS_GO_IN_BSS are
|
---|
469 | * enabled, we otherwise get a "storage size isn't constant error. */
|
---|
470 | static int serveConnection(char *tmpbuf, int n_read)
|
---|
471 | {
|
---|
472 | char *p = tmpbuf;
|
---|
473 |
|
---|
474 | while (p < tmpbuf + n_read) {
|
---|
475 |
|
---|
476 | int pri = (LOG_USER | LOG_NOTICE);
|
---|
477 | int num_lt = 0;
|
---|
478 | char line[MAXLINE + 1];
|
---|
479 | unsigned char c;
|
---|
480 | char *q = line;
|
---|
481 |
|
---|
482 | while ((c = *p) && q < &line[sizeof(line) - 1]) {
|
---|
483 | if (c == '<' && num_lt == 0) {
|
---|
484 | /* Parse the magic priority number. */
|
---|
485 | num_lt++;
|
---|
486 | pri = 0;
|
---|
487 | while (isdigit(*(++p))) {
|
---|
488 | pri = 10 * pri + (*p - '0');
|
---|
489 | }
|
---|
490 | if (pri & ~(LOG_FACMASK | LOG_PRIMASK)) {
|
---|
491 | pri = (LOG_USER | LOG_NOTICE);
|
---|
492 | }
|
---|
493 | } else if (c == '\n') {
|
---|
494 | *q++ = ' ';
|
---|
495 | } else if (iscntrl(c) && (c < 0177)) {
|
---|
496 | *q++ = '^';
|
---|
497 | *q++ = c ^ 0100;
|
---|
498 | } else {
|
---|
499 | *q++ = c;
|
---|
500 | }
|
---|
501 | p++;
|
---|
502 | }
|
---|
503 | *q = '\0';
|
---|
504 | p++;
|
---|
505 | /* Now log it */
|
---|
506 | logMessage(pri, line);
|
---|
507 | }
|
---|
508 | return n_read;
|
---|
509 | }
|
---|
510 |
|
---|
511 | static void doSyslogd(void) ATTRIBUTE_NORETURN;
|
---|
512 | static void doSyslogd(void)
|
---|
513 | {
|
---|
514 | struct sockaddr_un sunx;
|
---|
515 | socklen_t addrLength;
|
---|
516 |
|
---|
517 | int sock_fd;
|
---|
518 | fd_set fds;
|
---|
519 |
|
---|
520 | /* Set up signal handlers. */
|
---|
521 | signal(SIGINT, quit_signal);
|
---|
522 | signal(SIGTERM, quit_signal);
|
---|
523 | signal(SIGQUIT, quit_signal);
|
---|
524 | signal(SIGHUP, SIG_IGN);
|
---|
525 | signal(SIGCHLD, SIG_IGN);
|
---|
526 | #ifdef SIGCLD
|
---|
527 | signal(SIGCLD, SIG_IGN);
|
---|
528 | #endif
|
---|
529 | signal(SIGALRM, domark);
|
---|
530 | alarm(MarkInterval);
|
---|
531 |
|
---|
532 | /* Create the syslog file so realpath() can work. */
|
---|
533 | if (realpath(_PATH_LOG, lfile) != NULL) {
|
---|
534 | unlink(lfile);
|
---|
535 | }
|
---|
536 |
|
---|
537 | memset(&sunx, 0, sizeof(sunx));
|
---|
538 | sunx.sun_family = AF_UNIX;
|
---|
539 | strncpy(sunx.sun_path, lfile, sizeof(sunx.sun_path));
|
---|
540 | sock_fd = bb_xsocket(AF_UNIX, SOCK_DGRAM, 0);
|
---|
541 | addrLength = sizeof(sunx.sun_family) + strlen(sunx.sun_path);
|
---|
542 | if (bind(sock_fd, (struct sockaddr *) &sunx, addrLength) < 0) {
|
---|
543 | bb_perror_msg_and_die("Could not connect to socket " _PATH_LOG);
|
---|
544 | }
|
---|
545 |
|
---|
546 | if (chmod(lfile, 0666) < 0) {
|
---|
547 | bb_perror_msg_and_die("Could not set permission on " _PATH_LOG);
|
---|
548 | }
|
---|
549 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
|
---|
550 | if (circular_logging == TRUE) {
|
---|
551 | ipcsyslog_init();
|
---|
552 | }
|
---|
553 | #endif
|
---|
554 |
|
---|
555 | #ifdef CONFIG_FEATURE_REMOTE_LOG
|
---|
556 | if (doRemoteLog == TRUE) {
|
---|
557 | init_RemoteLog();
|
---|
558 | }
|
---|
559 | #endif
|
---|
560 |
|
---|
561 | logMessage(LOG_SYSLOG | LOG_INFO, "syslogd started: " "BusyBox v" BB_VER );
|
---|
562 |
|
---|
563 | for (;;) {
|
---|
564 |
|
---|
565 | FD_ZERO(&fds);
|
---|
566 | FD_SET(sock_fd, &fds);
|
---|
567 |
|
---|
568 | if (select(sock_fd + 1, &fds, NULL, NULL, NULL) < 0) {
|
---|
569 | if (errno == EINTR) {
|
---|
570 | /* alarm may have happened. */
|
---|
571 | continue;
|
---|
572 | }
|
---|
573 | bb_perror_msg_and_die("select error");
|
---|
574 | }
|
---|
575 |
|
---|
576 | if (FD_ISSET(sock_fd, &fds)) {
|
---|
577 | int i;
|
---|
578 | #if MAXLINE > BUFSIZ
|
---|
579 | # define TMP_BUF_SZ BUFSIZ
|
---|
580 | #else
|
---|
581 | # define TMP_BUF_SZ MAXLINE
|
---|
582 | #endif
|
---|
583 | #define tmpbuf bb_common_bufsiz1
|
---|
584 |
|
---|
585 | if ((i = recv(sock_fd, tmpbuf, TMP_BUF_SZ, 0)) > 0) {
|
---|
586 | tmpbuf[i] = '\0';
|
---|
587 | serveConnection(tmpbuf, i);
|
---|
588 | } else {
|
---|
589 | bb_perror_msg_and_die("UNIX socket error");
|
---|
590 | }
|
---|
591 | } /* FD_ISSET() */
|
---|
592 | } /* for main loop */
|
---|
593 | }
|
---|
594 |
|
---|
595 | int syslogd_main(int argc, char **argv)
|
---|
596 | {
|
---|
597 | int opt;
|
---|
598 |
|
---|
599 | int doFork = TRUE;
|
---|
600 |
|
---|
601 | char *p;
|
---|
602 |
|
---|
603 | /* do normal option parsing */
|
---|
604 | while ((opt = getopt(argc, argv, "m:nO:s:Sb:R:LC::")) > 0) {
|
---|
605 | switch (opt) {
|
---|
606 | case 'm':
|
---|
607 | MarkInterval = atoi(optarg) * 60;
|
---|
608 | break;
|
---|
609 | case 'n':
|
---|
610 | doFork = FALSE;
|
---|
611 | break;
|
---|
612 | case 'O':
|
---|
613 | logFilePath = optarg;
|
---|
614 | break;
|
---|
615 | #ifdef CONFIG_FEATURE_ROTATE_LOGFILE
|
---|
616 | case 's':
|
---|
617 | logFileSize = atoi(optarg) * 1024;
|
---|
618 | break;
|
---|
619 | case 'b':
|
---|
620 | logFileRotate = atoi(optarg);
|
---|
621 | if( logFileRotate > 99 ) logFileRotate = 99;
|
---|
622 | break;
|
---|
623 | #endif
|
---|
624 | #ifdef CONFIG_FEATURE_REMOTE_LOG
|
---|
625 | case 'R':
|
---|
626 | RemoteHost = bb_xstrdup(optarg);
|
---|
627 | if ((p = strchr(RemoteHost, ':'))) {
|
---|
628 | RemotePort = atoi(p + 1);
|
---|
629 | *p = '\0';
|
---|
630 | }
|
---|
631 | doRemoteLog = TRUE;
|
---|
632 | break;
|
---|
633 | case 'L':
|
---|
634 | local_logging = TRUE;
|
---|
635 | break;
|
---|
636 | #endif
|
---|
637 | #ifdef CONFIG_FEATURE_IPC_SYSLOG
|
---|
638 | case 'C':
|
---|
639 | if (optarg) {
|
---|
640 | int buf_size = atoi(optarg);
|
---|
641 | if (buf_size >= 4) {
|
---|
642 | shm_size = buf_size * 1024;
|
---|
643 | }
|
---|
644 | }
|
---|
645 | circular_logging = TRUE;
|
---|
646 | break;
|
---|
647 | #endif
|
---|
648 | case 'S':
|
---|
649 | small = true;
|
---|
650 | break;
|
---|
651 | default:
|
---|
652 | bb_show_usage();
|
---|
653 | }
|
---|
654 | }
|
---|
655 |
|
---|
656 | #ifdef CONFIG_FEATURE_REMOTE_LOG
|
---|
657 | /* If they have not specified remote logging, then log locally */
|
---|
658 | if (doRemoteLog == FALSE)
|
---|
659 | local_logging = TRUE;
|
---|
660 | #endif
|
---|
661 |
|
---|
662 |
|
---|
663 | /* Store away localhost's name before the fork */
|
---|
664 | gethostname(LocalHostName, sizeof(LocalHostName));
|
---|
665 | if ((p = strchr(LocalHostName, '.'))) {
|
---|
666 | *p = '\0';
|
---|
667 | }
|
---|
668 |
|
---|
669 | umask(0);
|
---|
670 |
|
---|
671 | if (doFork == TRUE) {
|
---|
672 | #ifdef BB_NOMMU
|
---|
673 | vfork_daemon_rexec(0, 1, argc, argv, "-n");
|
---|
674 | #else
|
---|
675 | bb_xdaemon(0, 1);
|
---|
676 | #endif
|
---|
677 | }
|
---|
678 | doSyslogd();
|
---|
679 |
|
---|
680 | return EXIT_SUCCESS;
|
---|
681 | }
|
---|