src/server/daemon/log.c

Wed, 26 Oct 2016 15:53:56 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Wed, 26 Oct 2016 15:53:56 +0200
changeset 118
38bf6dd8f4e7
parent 115
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child 130
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permissions
-rw-r--r--

adds minimal cgi implementation

some env vars still missing
request body not supported yet

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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
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40 #include "log.h"
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41 #include "../util/strbuf.h"
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42 #include "../util/io.h"
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43 #include "../util/atomic.h"
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44
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45 #include <ucx/map.h>
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46
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47 static int is_initialized = 0;
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48
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49 static int log_file_fd;
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50 static int log_level = 0;
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51
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52 WSBool main_is_daemon(void);
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53
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54 /*
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55 * if the log file is uninitialized, output is written to the ui_buffer
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56 */
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57 static sbuf_t *ui_buffer = NULL;
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58
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59 /*
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60 * access log file map
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61 */
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62 static UcxMap *access_log_files; // map of LogFile*
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63
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64
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65 static char *log_date_month[] = {
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66 "Jan",
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67 "Feb",
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68 "Mar",
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69 "Apr",
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70 "May",
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71 "Jun",
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72 "Jul",
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73 "Aug",
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74 "Sep",
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75 "Oct",
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76 "Nov",
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77 "Dec"
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78 };
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79
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80 static char *log_levels[] = {
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81 "warning",
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82 "config",
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83 "security",
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84 "failure",
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85 "catastrophe",
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86 "info",
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87 "verbose"
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88 };
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89
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90 static int can_log[] = {
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91 1, // warning
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92 1, // config
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93 1, // security
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94 1, // failure
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95 1, // catastrophe
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96 1, // info
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97 0 // verbose
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98 };
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99
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100 int init_log_file(LogConfig *cfg) {
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101 if(is_initialized) {
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102 return 0;
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103 }
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104
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105 /* open the log file */
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106 mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
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107 log_file_fd = open(cfg->file, O_WRONLY | O_CREAT | O_APPEND, mode);
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108 if(log_file_fd == -1) {
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109 return -1;
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110 }
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111
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112 if(!strcmp(cfg->level, "ERROR")) {
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113 can_log[LOG_WARN] = 0;
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114 can_log[LOG_INFORM] = 0;
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115 } else if(!strcmp(cfg->level, "WARNING")) {
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116 can_log[LOG_INFORM] = 0;
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117 } else if(!strcmp(cfg->level, "INFO")) {
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118
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119 }
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120
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121 if(cfg->log_stdout) {
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122 // TODO
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123 }
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124 if(cfg->log_stderr) {
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125 // TODO
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126 }
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127
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128
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129 is_initialized = 1;
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130
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131 /* if ui_buffer is not NULL, write it to the log file */
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132 if(ui_buffer) {
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133 size_t len = ui_buffer->length;
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134 size_t r;
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135 while(len > 0) {
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136 r = write(log_file_fd, ui_buffer->ptr, ui_buffer->length);
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137 len -= r;
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138 }
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139
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140 sbuf_free(ui_buffer);
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141 }
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142
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143 return 0;
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144 }
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145
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146 void log_uninitialized_writeln(char *str, size_t len) {
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147 if(ui_buffer == NULL) {
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148 ui_buffer = sbuf_new(1024);
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149 if(ui_buffer == NULL) {
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150 return; /* TODO: critical error, exit */
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151 }
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152 }
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153
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154 sstr_t s;
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155 s.ptr = str;
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156 s.length = len;
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157
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158 sbuf_append(ui_buffer, s);
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159 sbuf_put(ui_buffer, '\n');
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160 }
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161
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162 void log_file_writeln(char *str, size_t len) {
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163 if(!is_initialized) {
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164 log_uninitialized_writeln(str, len);
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165 }
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166
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167 struct iovec io[] = {
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168 { str, len },
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169 { "\n", 1}
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170 };
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171
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172 writev(log_file_fd, io, 2); /* TODO: aio */
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173 if(!main_is_daemon()) {
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174 writev(STDOUT_FILENO, io, 2);
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175 }
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176 }
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177
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178 sstr_t log_get_prefix(int level) {
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179 time_t t = time(NULL);
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180
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181 sstr_t d;
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182 d.ptr = NULL;
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183 d.length = 0;
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184
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185 struct tm date;
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186 localtime_r(&t, &date);
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187
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188 char *buf = malloc(64);
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189 int len = snprintf(
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190 buf,
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191 64,
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192 "[%02d/%s/%d:%02d:%02d:%02d] %s : ",
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193 date.tm_mday,
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194 log_date_month[date.tm_mon],
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195 1900 + date.tm_year,
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196 date.tm_hour,
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197 date.tm_min,
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198 date.tm_sec,
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199 log_levels[level]);
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200
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201 if(len > 0) {
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202 d.ptr = buf;
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203 d.length = len;
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204 }
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205
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206 return d;
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207 }
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208
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209
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210 /*
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211 * log api functions
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212 */
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213
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214 int log_ereport(int degree, const char *format, ...) {
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215 va_list args;
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216 va_start(args, format);
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217 int ret = log_ereport_v(degree, format, args);
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218 va_end(args);
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219 return ret;
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220 }
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221
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222 int log_ereport_v(int degree, const char *format, va_list args) {
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223 if(degree > 6) {
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224 return 0;
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225 }
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226 if(degree > 0 && !can_log[degree]) {
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227 return 0;
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228 }
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229
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230 sstr_t lmsg;
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231 lmsg.ptr = NULL;
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232
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233 /* create log message prefix */
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234 sstr_t lpre = log_get_prefix(degree);
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235
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236 /* format message */
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237 int len = vasprintf(&lmsg.ptr, format, args);
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238 lmsg.length = len;
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239
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240 /* create message string */
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241 sstr_t message = sstrcat(2, lpre, lmsg);
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242
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243 /* write message to the log file */
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244 log_file_writeln(message.ptr, message.length);
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245
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246 /* cleanup */
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247 free(lmsg.ptr);
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248 free(lpre.ptr);
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249 free(message.ptr);
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250
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251 return 0;
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252 }
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253
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254 int log_error(int degree, const char *func, Session *sn, Request *rq,
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255 const char *format, ...)
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256 {
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257 va_list args;
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258 va_start(args, format);
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259 int ret = log_error_v(degree, func, sn, rq, format, args);
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260 va_end(args);
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261 return ret;
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262 }
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263
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264 int log_error_v(int degree, const char *func, Session *sn, Request *rq,
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265 const char *format, va_list args)
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266 {
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267 // TODO: implement
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268 return log_ereport(degree, format, args);
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269 }
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270
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271
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272 void ws_log_assert(const char *file, const char *func, int line) {
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273 log_ereport(
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274 LOG_CATASTROPHE,
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275 "assertion failed: %s: %s:%d",
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276 file,
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277 func,
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278 line);
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279 exit(-1);
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280 }
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281
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282
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283 /*
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284 * access log
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285 * This source file only manages access log files. IO is performed directly
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286 * by AddLog safs.
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287 */
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288 LogFile* get_access_log_file(sstr_t file) {
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289 if(!access_log_files) {
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290 access_log_files = ucx_map_new(4);
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291 }
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292
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293 if(file.ptr == NULL || file.length == 0) {
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294 return NULL;
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295 }
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296
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297 LogFile *log = ucx_map_sstr_get(access_log_files, file);
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298 if(log != NULL) {
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299 ws_atomic_inc32(&log->ref);
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300 return log;
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301 }
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302
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303 // the log file is not opened
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304 // check first if we can open it
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305 FILE *out = fopen(file.ptr, "a");
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306 if(out == NULL) {
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307 return NULL;
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308 }
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309
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310 // create LogFile object
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311 log = calloc(1, sizeof(LogFile));
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312 log->file = out;
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313 log->ref = 1;
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314
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315 // add access log to the map
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316 ucx_map_sstr_put(access_log_files, file, log);
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317
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318 return log;
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319 }
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diff changeset
320

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