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 "libbb.h"
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17 | #include <paths.h>
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18 | #include <sys/un.h>
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19 |
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20 | /* SYSLOG_NAMES defined to pull prioritynames[] and facilitynames[]
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21 | * from syslog.h. Grrrr - glibc puts those in _rwdata_! :( */
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22 | #define SYSLOG_NAMES
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23 | #define SYSLOG_NAMES_CONST /* uclibc is saner :) */
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24 | #include <sys/syslog.h>
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25 | #include <sys/uio.h>
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26 |
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27 | #if ENABLE_FEATURE_REMOTE_LOG
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28 | #include <netinet/in.h>
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29 | #endif
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30 |
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31 | #if ENABLE_FEATURE_IPC_SYSLOG
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32 | #include <sys/ipc.h>
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33 | #include <sys/sem.h>
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34 | #include <sys/shm.h>
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35 | #endif
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36 |
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37 |
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38 | #define DEBUG 0
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39 |
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40 | /* MARK code is not very useful, is bloat, and broken:
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41 | * can deadlock if alarmed to make MARK while writing to IPC buffer
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42 | * (semaphores are down but do_mark routine tries to down them again) */
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43 | #undef SYSLOGD_MARK
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44 |
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45 | enum { MAX_READ = 256 };
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46 |
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47 | /* Semaphore operation structures */
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48 | struct shbuf_ds {
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49 | int32_t size; /* size of data - 1 */
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50 | int32_t tail; /* end of message list */
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51 | char data[1]; /* data/messages */
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52 | };
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53 |
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54 | /* Allows us to have smaller initializer. Ugly. */
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55 | #define GLOBALS \
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56 | const char *logFilePath; \
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57 | int logFD; \
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58 | /* interval between marks in seconds */ \
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59 | /*int markInterval;*/ \
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60 | /* level of messages to be logged */ \
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61 | int logLevel; \
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62 | USE_FEATURE_ROTATE_LOGFILE( \
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63 | /* max size of file before rotation */ \
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64 | unsigned logFileSize; \
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65 | /* number of rotated message files */ \
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66 | unsigned logFileRotate; \
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67 | unsigned curFileSize; \
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68 | smallint isRegular; \
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69 | ) \
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70 | USE_FEATURE_REMOTE_LOG( \
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71 | /* udp socket for remote logging */ \
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72 | int remoteFD; \
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73 | len_and_sockaddr* remoteAddr; \
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74 | ) \
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75 | USE_FEATURE_IPC_SYSLOG( \
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76 | int shmid; /* ipc shared memory id */ \
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77 | int s_semid; /* ipc semaphore id */ \
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78 | int shm_size; \
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79 | struct sembuf SMwup[1]; \
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80 | struct sembuf SMwdn[3]; \
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81 | )
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82 |
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83 | struct init_globals {
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84 | GLOBALS
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85 | };
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86 |
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87 | struct globals {
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88 | GLOBALS
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89 | #if ENABLE_FEATURE_IPC_SYSLOG
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90 | struct shbuf_ds *shbuf;
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91 | #endif
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92 | time_t last_log_time;
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93 | /* localhost's name */
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94 | char localHostName[64];
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95 |
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96 | /* We recv into recvbuf... */
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97 | char recvbuf[MAX_READ];
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98 | /* ...then copy to parsebuf, escaping control chars */
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99 | /* (can grow x2 max) */
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100 | char parsebuf[MAX_READ*2];
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101 | /* ...then sprintf into printbuf, adding timestamp (15 chars),
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102 | * host (64), fac.prio (20) to the message */
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103 | /* (growth by: 15 + 64 + 20 + delims = ~110) */
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104 | char printbuf[MAX_READ*2 + 128];
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105 | };
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106 |
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107 | static const struct init_globals init_data = {
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108 | .logFilePath = "/var/log/messages",
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109 | .logFD = -1,
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110 | #ifdef SYSLOGD_MARK
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111 | .markInterval = 20 * 60,
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112 | #endif
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113 | .logLevel = 8,
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114 | #if ENABLE_FEATURE_ROTATE_LOGFILE
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115 | .logFileSize = 200 * 1024,
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116 | .logFileRotate = 1,
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117 | #endif
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118 | #if ENABLE_FEATURE_REMOTE_LOG
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119 | .remoteFD = -1,
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120 | #endif
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121 | #if ENABLE_FEATURE_IPC_SYSLOG
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122 | .shmid = -1,
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123 | .s_semid = -1,
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124 | .shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024), // default shm size
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125 | .SMwup = { {1, -1, IPC_NOWAIT} },
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126 | .SMwdn = { {0, 0}, {1, 0}, {1, +1} },
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127 | #endif
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128 | };
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129 |
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130 | #define G (*ptr_to_globals)
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131 |
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132 |
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133 | /* Options */
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134 | enum {
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135 | OPTBIT_mark = 0, // -m
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136 | OPTBIT_nofork, // -n
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137 | OPTBIT_outfile, // -O
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138 | OPTBIT_loglevel, // -l
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139 | OPTBIT_small, // -S
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140 | USE_FEATURE_ROTATE_LOGFILE(OPTBIT_filesize ,) // -s
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141 | USE_FEATURE_ROTATE_LOGFILE(OPTBIT_rotatecnt ,) // -b
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142 | USE_FEATURE_REMOTE_LOG( OPTBIT_remote ,) // -R
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143 | USE_FEATURE_REMOTE_LOG( OPTBIT_localtoo ,) // -L
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144 | USE_FEATURE_IPC_SYSLOG( OPTBIT_circularlog,) // -C
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145 |
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146 | OPT_mark = 1 << OPTBIT_mark ,
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147 | OPT_nofork = 1 << OPTBIT_nofork ,
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148 | OPT_outfile = 1 << OPTBIT_outfile ,
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149 | OPT_loglevel = 1 << OPTBIT_loglevel,
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150 | OPT_small = 1 << OPTBIT_small ,
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151 | OPT_filesize = USE_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_filesize )) + 0,
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152 | OPT_rotatecnt = USE_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_rotatecnt )) + 0,
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153 | OPT_remotelog = USE_FEATURE_REMOTE_LOG( (1 << OPTBIT_remote )) + 0,
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154 | OPT_locallog = USE_FEATURE_REMOTE_LOG( (1 << OPTBIT_localtoo )) + 0,
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155 | OPT_circularlog = USE_FEATURE_IPC_SYSLOG( (1 << OPTBIT_circularlog)) + 0,
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156 | };
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157 | #define OPTION_STR "m:nO:l:S" \
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158 | USE_FEATURE_ROTATE_LOGFILE("s:" ) \
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159 | USE_FEATURE_ROTATE_LOGFILE("b:" ) \
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160 | USE_FEATURE_REMOTE_LOG( "R:" ) \
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161 | USE_FEATURE_REMOTE_LOG( "L" ) \
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162 | USE_FEATURE_IPC_SYSLOG( "C::")
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163 | #define OPTION_DECL *opt_m, *opt_l \
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164 | USE_FEATURE_ROTATE_LOGFILE(,*opt_s) \
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165 | USE_FEATURE_ROTATE_LOGFILE(,*opt_b) \
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166 | USE_FEATURE_REMOTE_LOG( ,*opt_R) \
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167 | USE_FEATURE_IPC_SYSLOG( ,*opt_C = NULL)
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168 | #define OPTION_PARAM &opt_m, &G.logFilePath, &opt_l \
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169 | USE_FEATURE_ROTATE_LOGFILE(,&opt_s) \
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170 | USE_FEATURE_ROTATE_LOGFILE(,&opt_b) \
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171 | USE_FEATURE_REMOTE_LOG( ,&opt_R) \
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172 | USE_FEATURE_IPC_SYSLOG( ,&opt_C)
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173 |
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174 |
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175 | /* circular buffer variables/structures */
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176 | #if ENABLE_FEATURE_IPC_SYSLOG
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177 |
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178 | #if CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE < 4
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179 | #error Sorry, you must set the syslogd buffer size to at least 4KB.
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180 | #error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
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181 | #endif
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182 |
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183 | /* our shared key */
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184 | #define KEY_ID ((long)0x414e4547) /* "GENA" */
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185 |
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186 | static void ipcsyslog_cleanup(void)
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187 | {
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188 | if (G.shmid != -1) {
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189 | shmdt(G.shbuf);
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190 | }
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191 | if (G.shmid != -1) {
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192 | shmctl(G.shmid, IPC_RMID, NULL);
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193 | }
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194 | if (G.s_semid != -1) {
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195 | semctl(G.s_semid, 0, IPC_RMID, 0);
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196 | }
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197 | }
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198 |
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199 | static void ipcsyslog_init(void)
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200 | {
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201 | if (DEBUG)
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202 | printf("shmget(%lx, %d,...)\n", KEY_ID, G.shm_size);
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203 |
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204 | G.shmid = shmget(KEY_ID, G.shm_size, IPC_CREAT | 0644);
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205 | if (G.shmid == -1) {
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206 | bb_perror_msg_and_die("shmget");
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207 | }
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208 |
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209 | G.shbuf = shmat(G.shmid, NULL, 0);
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210 | if (!G.shbuf) {
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211 | bb_perror_msg_and_die("shmat");
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212 | }
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213 |
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214 | memset(G.shbuf, 0, G.shm_size);
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215 | G.shbuf->size = G.shm_size - offsetof(struct shbuf_ds, data) - 1;
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216 | /*G.shbuf->tail = 0;*/
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217 |
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218 | // we'll trust the OS to set initial semval to 0 (let's hope)
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219 | G.s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023);
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220 | if (G.s_semid == -1) {
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221 | if (errno == EEXIST) {
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222 | G.s_semid = semget(KEY_ID, 2, 0);
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223 | if (G.s_semid != -1)
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224 | return;
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225 | }
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226 | bb_perror_msg_and_die("semget");
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227 | }
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228 | }
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229 |
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230 | /* Write message to shared mem buffer */
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231 | static void log_to_shmem(const char *msg, int len)
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232 | {
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233 | int old_tail, new_tail;
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234 |
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235 | if (semop(G.s_semid, G.SMwdn, 3) == -1) {
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236 | bb_perror_msg_and_die("SMwdn");
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237 | }
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238 |
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239 | /* Circular Buffer Algorithm:
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240 | * --------------------------
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241 | * tail == position where to store next syslog message.
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242 | * tail's max value is (shbuf->size - 1)
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243 | * Last byte of buffer is never used and remains NUL.
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244 | */
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245 | len++; /* length with NUL included */
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246 | again:
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247 | old_tail = G.shbuf->tail;
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248 | new_tail = old_tail + len;
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249 | if (new_tail < G.shbuf->size) {
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250 | /* store message, set new tail */
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251 | memcpy(G.shbuf->data + old_tail, msg, len);
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252 | G.shbuf->tail = new_tail;
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253 | } else {
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254 | /* k == available buffer space ahead of old tail */
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255 | int k = G.shbuf->size - old_tail;
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256 | /* copy what fits to the end of buffer, and repeat */
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257 | memcpy(G.shbuf->data + old_tail, msg, k);
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258 | msg += k;
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259 | len -= k;
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260 | G.shbuf->tail = 0;
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261 | goto again;
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262 | }
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263 | if (semop(G.s_semid, G.SMwup, 1) == -1) {
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264 | bb_perror_msg_and_die("SMwup");
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265 | }
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266 | if (DEBUG)
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267 | printf("tail:%d\n", G.shbuf->tail);
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268 | }
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269 | #else
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270 | void ipcsyslog_cleanup(void);
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271 | void ipcsyslog_init(void);
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272 | void log_to_shmem(const char *msg);
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273 | #endif /* FEATURE_IPC_SYSLOG */
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274 |
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275 |
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276 | /* Print a message to the log file. */
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277 | static void log_locally(char *msg)
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278 | {
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279 | struct flock fl;
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280 | int len = strlen(msg);
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281 |
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282 | #if ENABLE_FEATURE_IPC_SYSLOG
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283 | if ((option_mask32 & OPT_circularlog) && G.shbuf) {
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284 | log_to_shmem(msg, len);
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285 | return;
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286 | }
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287 | #endif
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288 | if (G.logFD >= 0) {
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289 | time_t cur;
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290 | time(&cur);
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291 | if (G.last_log_time != cur) {
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292 | G.last_log_time = cur; /* reopen log file every second */
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293 | close(G.logFD);
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294 | goto reopen;
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295 | }
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296 | } else {
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297 | reopen:
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298 | G.logFD = device_open(G.logFilePath, O_WRONLY | O_CREAT
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299 | | O_NOCTTY | O_APPEND | O_NONBLOCK);
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300 | if (G.logFD < 0) {
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301 | /* cannot open logfile? - print to /dev/console then */
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302 | int fd = device_open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY | O_NONBLOCK);
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303 | if (fd < 0)
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304 | fd = 2; /* then stderr, dammit */
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305 | full_write(fd, msg, len);
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306 | if (fd != 2)
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307 | close(fd);
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308 | return;
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309 | }
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310 | #if ENABLE_FEATURE_ROTATE_LOGFILE
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311 | {
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312 | struct stat statf;
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313 | G.isRegular = (fstat(G.logFD, &statf) == 0 && S_ISREG(statf.st_mode));
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314 | /* bug (mostly harmless): can wrap around if file > 4gb */
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315 | G.curFileSize = statf.st_size;
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316 | }
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317 | #endif
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318 | }
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319 |
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320 | fl.l_whence = SEEK_SET;
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321 | fl.l_start = 0;
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322 | fl.l_len = 1;
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323 | fl.l_type = F_WRLCK;
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324 | fcntl(G.logFD, F_SETLKW, &fl);
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325 |
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326 | #if ENABLE_FEATURE_ROTATE_LOGFILE
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327 | if (G.logFileSize && G.isRegular && G.curFileSize > G.logFileSize) {
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328 | if (G.logFileRotate) { /* always 0..99 */
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329 | int i = strlen(G.logFilePath) + 3 + 1;
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330 | char oldFile[i];
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331 | char newFile[i];
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332 | i = G.logFileRotate - 1;
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333 | /* rename: f.8 -> f.9; f.7 -> f.8; ... */
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334 | while (1) {
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335 | sprintf(newFile, "%s.%d", G.logFilePath, i);
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336 | if (i == 0) break;
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337 | sprintf(oldFile, "%s.%d", G.logFilePath, --i);
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338 | rename(oldFile, newFile);
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339 | }
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340 | /* newFile == "f.0" now */
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341 | rename(G.logFilePath, newFile);
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342 | fl.l_type = F_UNLCK;
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343 | fcntl(G.logFD, F_SETLKW, &fl);
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344 | close(G.logFD);
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345 | goto reopen;
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346 | }
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347 | ftruncate(G.logFD, 0);
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348 | }
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349 | G.curFileSize +=
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350 | #endif
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351 | full_write(G.logFD, msg, len);
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352 | fl.l_type = F_UNLCK;
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353 | fcntl(G.logFD, F_SETLKW, &fl);
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354 | }
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355 |
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356 | static void parse_fac_prio_20(int pri, char *res20)
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357 | {
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358 | const CODE *c_pri, *c_fac;
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359 |
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360 | if (pri != 0) {
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361 | c_fac = facilitynames;
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362 | while (c_fac->c_name) {
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363 | if (c_fac->c_val != (LOG_FAC(pri) << 3)) {
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364 | c_fac++; continue;
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365 | }
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366 | /* facility is found, look for prio */
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367 | c_pri = prioritynames;
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368 | while (c_pri->c_name) {
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369 | if (c_pri->c_val != LOG_PRI(pri)) {
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370 | c_pri++; continue;
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371 | }
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372 | snprintf(res20, 20, "%s.%s",
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373 | c_fac->c_name, c_pri->c_name);
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374 | return;
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375 | }
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376 | /* prio not found, bail out */
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377 | break;
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378 | }
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379 | snprintf(res20, 20, "<%d>", pri);
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380 | }
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381 | }
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382 |
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383 | /* len parameter is used only for "is there a timestamp?" check.
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384 | * NB: some callers cheat and supply 0 when they know
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385 | * that there is no timestamp, short-cutting the test. */
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386 | static void timestamp_and_log(int pri, char *msg, int len)
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387 | {
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388 | char *timestamp;
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389 |
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390 | if (len < 16 || msg[3] != ' ' || msg[6] != ' '
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391 | || msg[9] != ':' || msg[12] != ':' || msg[15] != ' '
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392 | ) {
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393 | time_t now;
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394 | time(&now);
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395 | timestamp = ctime(&now) + 4;
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396 | } else {
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397 | timestamp = msg;
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398 | msg += 16;
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399 | }
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400 | timestamp[15] = '\0';
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401 |
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402 | /* Log message locally (to file or shared mem) */
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403 | if (!ENABLE_FEATURE_REMOTE_LOG || (option_mask32 & OPT_locallog)) {
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404 | if (LOG_PRI(pri) < G.logLevel) {
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405 | if (option_mask32 & OPT_small)
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406 | sprintf(G.printbuf, "%s %s\n", timestamp, msg);
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407 | else {
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408 | char res[20];
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409 | parse_fac_prio_20(pri, res);
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410 | sprintf(G.printbuf, "%s %s %s %s\n", timestamp, G.localHostName, res, msg);
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411 | }
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412 | log_locally(G.printbuf);
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413 | }
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414 | }
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415 | }
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416 |
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417 | static void split_escape_and_log(char *tmpbuf, int len)
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418 | {
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419 | char *p = tmpbuf;
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420 |
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421 | tmpbuf += len;
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422 | while (p < tmpbuf) {
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423 | char c;
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424 | char *q = G.parsebuf;
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425 | int pri = (LOG_USER | LOG_NOTICE);
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426 |
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427 | if (*p == '<') {
|
---|
428 | /* Parse the magic priority number */
|
---|
429 | pri = bb_strtou(p + 1, &p, 10);
|
---|
430 | if (*p == '>') p++;
|
---|
431 | if (pri & ~(LOG_FACMASK | LOG_PRIMASK)) {
|
---|
432 | pri = (LOG_USER | LOG_NOTICE);
|
---|
433 | }
|
---|
434 | }
|
---|
435 |
|
---|
436 | while ((c = *p++)) {
|
---|
437 | if (c == '\n')
|
---|
438 | c = ' ';
|
---|
439 | if (!(c & ~0x1f) && c != '\t') {
|
---|
440 | *q++ = '^';
|
---|
441 | c += '@'; /* ^@, ^A, ^B... */
|
---|
442 | }
|
---|
443 | *q++ = c;
|
---|
444 | }
|
---|
445 | *q = '\0';
|
---|
446 | /* Now log it */
|
---|
447 | timestamp_and_log(pri, G.parsebuf, q - G.parsebuf);
|
---|
448 | }
|
---|
449 | }
|
---|
450 |
|
---|
451 | static void quit_signal(int sig)
|
---|
452 | {
|
---|
453 | timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)"syslogd exiting", 0);
|
---|
454 | puts("syslogd exiting");
|
---|
455 | if (ENABLE_FEATURE_IPC_SYSLOG)
|
---|
456 | ipcsyslog_cleanup();
|
---|
457 | exit(1);
|
---|
458 | }
|
---|
459 |
|
---|
460 | #ifdef SYSLOGD_MARK
|
---|
461 | static void do_mark(int sig)
|
---|
462 | {
|
---|
463 | if (G.markInterval) {
|
---|
464 | timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)"-- MARK --", 0);
|
---|
465 | alarm(G.markInterval);
|
---|
466 | }
|
---|
467 | }
|
---|
468 | #endif
|
---|
469 |
|
---|
470 | static void do_syslogd(void) ATTRIBUTE_NORETURN;
|
---|
471 | static void do_syslogd(void)
|
---|
472 | {
|
---|
473 | struct sockaddr_un sunx;
|
---|
474 | int sock_fd;
|
---|
475 | fd_set fds;
|
---|
476 | char *dev_log_name;
|
---|
477 |
|
---|
478 | /* Set up signal handlers */
|
---|
479 | signal(SIGINT, quit_signal);
|
---|
480 | signal(SIGTERM, quit_signal);
|
---|
481 | signal(SIGQUIT, quit_signal);
|
---|
482 | signal(SIGHUP, SIG_IGN);
|
---|
483 | signal(SIGCHLD, SIG_IGN);
|
---|
484 | #ifdef SIGCLD
|
---|
485 | signal(SIGCLD, SIG_IGN);
|
---|
486 | #endif
|
---|
487 | #ifdef SYSLOGD_MARK
|
---|
488 | signal(SIGALRM, do_mark);
|
---|
489 | alarm(G.markInterval);
|
---|
490 | #endif
|
---|
491 | remove_pidfile("/var/run/syslogd.pid");
|
---|
492 |
|
---|
493 | memset(&sunx, 0, sizeof(sunx));
|
---|
494 | sunx.sun_family = AF_UNIX;
|
---|
495 | strcpy(sunx.sun_path, "/dev/log");
|
---|
496 |
|
---|
497 | /* Unlink old /dev/log or object it points to. */
|
---|
498 | /* (if it exists, bind will fail) */
|
---|
499 | logmode = LOGMODE_NONE;
|
---|
500 | dev_log_name = xmalloc_readlink_or_warn("/dev/log");
|
---|
501 | logmode = LOGMODE_STDIO;
|
---|
502 | if (dev_log_name) {
|
---|
503 | int fd = xopen(".", O_NONBLOCK);
|
---|
504 | xchdir("/dev");
|
---|
505 | /* we do not check whether this is a link also */
|
---|
506 | unlink(dev_log_name);
|
---|
507 | fchdir(fd);
|
---|
508 | close(fd);
|
---|
509 | safe_strncpy(sunx.sun_path, dev_log_name, sizeof(sunx.sun_path));
|
---|
510 | free(dev_log_name);
|
---|
511 | } else {
|
---|
512 | unlink("/dev/log");
|
---|
513 | }
|
---|
514 |
|
---|
515 | sock_fd = xsocket(AF_UNIX, SOCK_DGRAM, 0);
|
---|
516 | xbind(sock_fd, (struct sockaddr *) &sunx, sizeof(sunx));
|
---|
517 |
|
---|
518 | if (chmod("/dev/log", 0666) < 0) {
|
---|
519 | bb_perror_msg_and_die("cannot set permission on /dev/log");
|
---|
520 | }
|
---|
521 | if (ENABLE_FEATURE_IPC_SYSLOG && (option_mask32 & OPT_circularlog)) {
|
---|
522 | ipcsyslog_init();
|
---|
523 | }
|
---|
524 |
|
---|
525 | timestamp_and_log(LOG_SYSLOG | LOG_INFO,
|
---|
526 | (char*)"syslogd started: BusyBox v" BB_VER, 0);
|
---|
527 |
|
---|
528 | for (;;) {
|
---|
529 | FD_ZERO(&fds);
|
---|
530 | FD_SET(sock_fd, &fds);
|
---|
531 |
|
---|
532 | if (select(sock_fd + 1, &fds, NULL, NULL, NULL) < 0) {
|
---|
533 | if (errno == EINTR) {
|
---|
534 | /* alarm may have happened */
|
---|
535 | continue;
|
---|
536 | }
|
---|
537 | bb_perror_msg_and_die("select");
|
---|
538 | }
|
---|
539 |
|
---|
540 | if (FD_ISSET(sock_fd, &fds)) {
|
---|
541 | int i;
|
---|
542 | i = recv(sock_fd, G.recvbuf, MAX_READ - 1, 0);
|
---|
543 | if (i <= 0)
|
---|
544 | bb_perror_msg_and_die("UNIX socket error");
|
---|
545 | /* TODO: maybe suppress duplicates? */
|
---|
546 | #if ENABLE_FEATURE_REMOTE_LOG
|
---|
547 | /* We are not modifying log messages in any way before send */
|
---|
548 | /* Remote site cannot trust _us_ anyway and need to do validation again */
|
---|
549 | if (G.remoteAddr) {
|
---|
550 | if (-1 == G.remoteFD) {
|
---|
551 | G.remoteFD = socket(G.remoteAddr->sa.sa_family, SOCK_DGRAM, 0);
|
---|
552 | }
|
---|
553 | if (-1 != G.remoteFD) {
|
---|
554 | /* send message to remote logger, ignore possible error */
|
---|
555 | sendto(G.remoteFD, G.recvbuf, i, MSG_DONTWAIT,
|
---|
556 | &G.remoteAddr->sa, G.remoteAddr->len);
|
---|
557 | }
|
---|
558 | }
|
---|
559 | #endif
|
---|
560 | G.recvbuf[i] = '\0';
|
---|
561 | split_escape_and_log(G.recvbuf, i);
|
---|
562 | } /* FD_ISSET() */
|
---|
563 | } /* for */
|
---|
564 | }
|
---|
565 |
|
---|
566 | int syslogd_main(int argc, char **argv);
|
---|
567 | int syslogd_main(int argc, char **argv)
|
---|
568 | {
|
---|
569 | char OPTION_DECL;
|
---|
570 | char *p;
|
---|
571 |
|
---|
572 | PTR_TO_GLOBALS = memcpy(xzalloc(sizeof(G)), &init_data, sizeof(init_data));
|
---|
573 |
|
---|
574 | /* do normal option parsing */
|
---|
575 | opt_complementary = "=0"; /* no non-option params */
|
---|
576 | getopt32(argv, OPTION_STR, OPTION_PARAM);
|
---|
577 | #ifdef SYSLOGD_MARK
|
---|
578 | if (option_mask32 & OPT_mark) // -m
|
---|
579 | G.markInterval = xatou_range(opt_m, 0, INT_MAX/60) * 60;
|
---|
580 | #endif
|
---|
581 | //if (option_mask32 & OPT_nofork) // -n
|
---|
582 | //if (option_mask32 & OPT_outfile) // -O
|
---|
583 | if (option_mask32 & OPT_loglevel) // -l
|
---|
584 | G.logLevel = xatou_range(opt_l, 1, 8);
|
---|
585 | //if (option_mask32 & OPT_small) // -S
|
---|
586 | #if ENABLE_FEATURE_ROTATE_LOGFILE
|
---|
587 | if (option_mask32 & OPT_filesize) // -s
|
---|
588 | G.logFileSize = xatou_range(opt_s, 0, INT_MAX/1024) * 1024;
|
---|
589 | if (option_mask32 & OPT_rotatecnt) // -b
|
---|
590 | G.logFileRotate = xatou_range(opt_b, 0, 99);
|
---|
591 | #endif
|
---|
592 | #if ENABLE_FEATURE_REMOTE_LOG
|
---|
593 | if (option_mask32 & OPT_remotelog) { // -R
|
---|
594 | G.remoteAddr = xhost2sockaddr(opt_R, 514);
|
---|
595 | }
|
---|
596 | //if (option_mask32 & OPT_locallog) // -L
|
---|
597 | #endif
|
---|
598 | #if ENABLE_FEATURE_IPC_SYSLOG
|
---|
599 | if (opt_C) // -Cn
|
---|
600 | G.shm_size = xatoul_range(opt_C, 4, INT_MAX/1024) * 1024;
|
---|
601 | #endif
|
---|
602 |
|
---|
603 | /* If they have not specified remote logging, then log locally */
|
---|
604 | if (ENABLE_FEATURE_REMOTE_LOG && !(option_mask32 & OPT_remotelog))
|
---|
605 | option_mask32 |= OPT_locallog;
|
---|
606 |
|
---|
607 | /* Store away localhost's name before the fork */
|
---|
608 | gethostname(G.localHostName, sizeof(G.localHostName));
|
---|
609 | p = strchr(G.localHostName, '.');
|
---|
610 | if (p) {
|
---|
611 | *p = '\0';
|
---|
612 | }
|
---|
613 |
|
---|
614 | if (!(option_mask32 & OPT_nofork)) {
|
---|
615 | bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
|
---|
616 | }
|
---|
617 | umask(0);
|
---|
618 | write_pidfile("/var/run/syslogd.pid");
|
---|
619 | do_syslogd();
|
---|
620 | /* return EXIT_SUCCESS; */
|
---|
621 | }
|
---|