src/server/daemon/log.c

Sun, 06 Nov 2022 15:53:32 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 06 Nov 2022 15:53:32 +0100
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child 434
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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #ifdef __gnu_linux__
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30 #define _GNU_SOURCE
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31 #endif
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32
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33 #include <stdio.h>
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34 #include <stdlib.h>
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35 #include <string.h>
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36 #include <unistd.h>
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37 #include <aio.h>
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38 #include <time.h>
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39 #include <pthread.h>
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40
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41 #include "log.h"
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42 #include "../util/strbuf.h"
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43 #include "../util/io.h"
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44 #include "../util/atomic.h"
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45
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46 #include <cx/hash_map.h>
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47 #include <cx/linked_list.h>
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48 #include <cx/compare.h>
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49
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50 static int is_initialized = 0;
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51
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52 static int log_file_fd;
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53 static int log_level = 0;
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54
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55 static uint32_t log_dup_count = 0;
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56 static CxList *log_dup_list = NULL;
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57 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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58
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59 WSBool main_is_daemon(void);
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60
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61 /*
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62 * if the log file is uninitialized, output is written to the ui_buffer
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63 */
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64 static sbuf_t *ui_buffer = NULL;
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65
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66 /*
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67 * access log file map
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68 */
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69 static CxMap *access_log_files; // map of LogFile*
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70
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71
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72 static char *log_date_month[] = {
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73 "Jan",
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74 "Feb",
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75 "Mar",
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76 "Apr",
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77 "May",
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78 "Jun",
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79 "Jul",
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80 "Aug",
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81 "Sep",
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82 "Oct",
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83 "Nov",
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84 "Dec"
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85 };
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86
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87 static char *log_levels[] = {
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88 "warning",
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89 "config",
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90 "security",
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91 "failure",
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92 "catastrophe",
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93 "info",
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94 "verbose",
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95 "debug"
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96 };
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97
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98 static int can_log[] = {
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99 1, // warning
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100 1, // config
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101 1, // security
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102 1, // failure
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103 1, // catastrophe
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104 1, // info
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105 0, // verbose
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106 0 // debug
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107 };
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108
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109 int init_log_file(LogConfig *cfg) {
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110 if(is_initialized) {
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111 return 0;
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112 }
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113
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114 log_dup_list = cxPointerLinkedListCreate(cxDefaultAllocator, cx_cmp_ptr);
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115
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116 /* open the log file */
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117 mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
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118 log_file_fd = open(cfg->file, O_WRONLY | O_CREAT | O_APPEND, mode);
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119 if(log_file_fd == -1) {
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120 log_ereport(LOG_FAILURE, "Cannot open log file %s: %s", cfg->file, strerror(errno));
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121 return -1;
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122 }
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123
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124 if(!strcmp(cfg->level, "ERROR")) {
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125 can_log[LOG_WARN] = 0;
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126 can_log[LOG_INFORM] = 0;
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127 } else if(!strcmp(cfg->level, "WARNING")) {
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128 can_log[LOG_INFORM] = 0;
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129 } else if(!strcmp(cfg->level, "VERBOSE")) {
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130 can_log[LOG_VERBOSE] = 1;
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131 } else if(!strcmp(cfg->level, "DEBUG")) {
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132 can_log[LOG_VERBOSE] = 1;
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133 can_log[LOG_DEBUG] = 1;
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134 }
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135
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136 if(cfg->log_stdout) {
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137 // TODO
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138 }
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139 if(cfg->log_stderr) {
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140 // TODO
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141 }
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144 is_initialized = 1;
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145
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146 /* if ui_buffer is not NULL, write it to the log file */
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147 if(ui_buffer) {
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148 size_t len = ui_buffer->length;
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149 size_t r;
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150 while(len > 0) {
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151 r = write(log_file_fd, ui_buffer->ptr, ui_buffer->length);
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152 len -= r;
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153 }
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154
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155 sbuf_free(ui_buffer);
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156 }
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157
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158 return 0;
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159 }
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161 void log_uninitialized_writeln(char *str, size_t len) {
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162 printf("%.*s\n", (int)len, str);
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163
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164 if(ui_buffer == NULL) {
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165 ui_buffer = sbuf_new(1024);
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166 if(ui_buffer == NULL) {
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167 return; /* TODO: critical error, exit */
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168 }
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169 }
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170
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171 cxstring s;
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172 s.ptr = str;
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173 s.length = len;
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174
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175 sbuf_append(ui_buffer, s);
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176 sbuf_put(ui_buffer, '\n');
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177 }
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178
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179 void log_file_writeln(char *str, size_t len) {
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180 if(!is_initialized) {
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181 log_uninitialized_writeln(str, len);
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182 return;
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183 }
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184
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185 struct iovec io[] = {
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186 { str, len },
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187 { "\n", 1}
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188 };
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189
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190 writev(log_file_fd, io, 2); /* TODO: aio? */
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191 if(!main_is_daemon()) {
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192 writev(STDOUT_FILENO, io, 2);
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193 }
167
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194
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195 if(log_dup_count > 0) {
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196 char *msg = malloc(len + 1);
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197 memcpy(msg, str, len);
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198 msg[len] = '\n';
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199
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200 pthread_mutex_lock(&mutex);
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201 CxIterator i = cxListIterator(log_dup_list, 0);
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202 cx_foreach(LogDup *, dup, i) {
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203 dup->write(dup->cookie, msg, len + 1);
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204 }
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205 pthread_mutex_unlock(&mutex);
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206
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207 free(msg);
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208 }
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209 }
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210
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211 cxmutstr log_get_prefix(int level) {
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212 time_t t = time(NULL);
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213
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214 cxmutstr d;
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215 d.ptr = NULL;
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216 d.length = 0;
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217
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218 struct tm date;
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219 localtime_r(&t, &date);
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220
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221 char *buf = malloc(64);
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222 int len = snprintf(
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223 buf,
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224 64,
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225 "[%02d/%s/%d:%02d:%02d:%02d] %s : ",
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226 date.tm_mday,
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227 log_date_month[date.tm_mon],
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228 1900 + date.tm_year,
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229 date.tm_hour,
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230 date.tm_min,
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231 date.tm_sec,
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232 log_levels[level]);
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233
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234 if(len > 0) {
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235 d.ptr = buf;
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236 d.length = len;
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237 }
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238
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239 return d;
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240 }
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241
167
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242 void log_add_logdup(LogDup *dup) {
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243 pthread_mutex_lock(&mutex);
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244 cxListAdd(log_dup_list, dup);
167
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245 ws_atomic_inc32(&log_dup_count);
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246 pthread_mutex_unlock(&mutex);
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247 }
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248
176
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249 void log_remove_logdup(LogDup *ldup) {
167
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250 pthread_mutex_lock(&mutex);
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251 CxIterator i = cxListIterator(log_dup_list, 0);
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252 WSBool finished = 0;
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253 cx_foreach(LogDup *, dup, i) {
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254 if(finished) break;
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255 if(dup == ldup) {
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256 i.remove = 1;
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257 finished = 1;
167
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258 ws_atomic_dec32(&log_dup_count);
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259 }
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260 }
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261 pthread_mutex_unlock(&mutex);
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262 }
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263
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264
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265 /*
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266 * log api functions
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267 */
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268
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269 int log_ereport(int degree, const char *format, ...) {
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270 va_list args;
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271 va_start(args, format);
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272 int ret = log_ereport_v(degree, format, args);
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273 va_end(args);
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274 return ret;
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275 }
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276
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277 int log_ereport_v(int degree, const char *format, va_list args) {
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278 if(degree < 0 || degree > 7) {
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279 return 0;
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280 }
166
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281 if(!can_log[degree]) {
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282 return 0;
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283 }
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284
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285 cxmutstr lmsg;
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286 lmsg.ptr = NULL;
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287
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288 /* create log message prefix */
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289 cxmutstr lpre = log_get_prefix(degree);
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290
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291 /* format message */
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292 int len = vasprintf(&lmsg.ptr, format, args);
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293 lmsg.length = len;
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294
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295 /* create message string */
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296 cxmutstr message = cx_strcat(2, lpre, lmsg);
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297
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298 /* write message to the log file */
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299 log_file_writeln(message.ptr, message.length);
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300
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301 /* cleanup */
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302 free(lmsg.ptr);
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303 free(lpre.ptr);
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304 free(message.ptr);
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305
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306 return 0;
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307 }
45
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308
82
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diff changeset
309 int log_error(int degree, const char *func, Session *sn, Request *rq,
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diff changeset
310 const char *format, ...)
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311 {
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312 va_list args;
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313 va_start(args, format);
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314 int ret = log_error_v(degree, func, sn, rq, format, args);
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315 va_end(args);
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316 return ret;
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317 }
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318
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diff changeset
319 int log_error_v(int degree, const char *func, Session *sn, Request *rq,
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diff changeset
320 const char *format, va_list args)
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321 {
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322 // TODO: implement
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323 return log_ereport(degree, format, args);
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324 }
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325
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326
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327 void ws_log_assert(const char *file, const char *func, int line) {
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328 log_ereport(
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329 LOG_CATASTROPHE,
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330 "assertion failed: %s: %s:%d",
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331 file,
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332 func,
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333 line);
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334 exit(-1);
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335 }
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336
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337
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338 /*
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339 * access log
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340 * This source file only manages access log files. IO is performed directly
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341 * by AddLog safs.
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342 */
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343 LogFile* get_access_log_file(cxstring file) {
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344 // TODO: this looks dubious
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345
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346 if(!access_log_files) {
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347 access_log_files = cxHashMapCreate(cxDefaultAllocator, 4);
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348 }
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349
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350 if(file.ptr == NULL || file.length == 0) {
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351 return NULL;
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352 }
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353
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354 CxHashKey key = cx_hash_key_bytes((unsigned const char*)file.ptr, file.length);
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355 LogFile *log = cxMapGet(access_log_files, key);
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356 if(log != NULL) {
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357 ws_atomic_inc32(&log->ref);
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358 return log;
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359 }
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360
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361 // the log file is not opened
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362 // check first if we can open it
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363 FILE *out = fopen(file.ptr, "a");
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364 if(out == NULL) {
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365 return NULL;
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366 }
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367
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368 // create LogFile object
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369 log = calloc(1, sizeof(LogFile));
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370 log->file = out;
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371 log->ref = 1;
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372
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373 // add access log to the map
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374 cxMapPut(access_log_files, key, log);
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375
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376 return log;
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377 }
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378

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