src/server/daemon/log.c

Tue, 01 Nov 2022 20:46:15 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 01 Nov 2022 20:46:15 +0100
changeset 407
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parent 392
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child 415
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permissions
-rw-r--r--

close connection if content-length != number of bytes written

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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 <ucx/map.h>
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47 #include <ucx/list.h>
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48
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49 static int is_initialized = 0;
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50
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51 static int log_file_fd;
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52 static int log_level = 0;
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53
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54 static uint32_t log_dup_count = 0;
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55 static UcxList *log_dup_list = NULL;
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56 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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57
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58 WSBool main_is_daemon(void);
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59
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60 /*
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61 * if the log file is uninitialized, output is written to the ui_buffer
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62 */
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63 static sbuf_t *ui_buffer = NULL;
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64
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65 /*
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66 * access log file map
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67 */
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68 static UcxMap *access_log_files; // map of LogFile*
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69
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70
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71 static char *log_date_month[] = {
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72 "Jan",
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73 "Feb",
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74 "Mar",
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75 "Apr",
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76 "May",
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77 "Jun",
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78 "Jul",
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79 "Aug",
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80 "Sep",
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81 "Oct",
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82 "Nov",
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83 "Dec"
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84 };
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85
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86 static char *log_levels[] = {
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87 "warning",
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88 "config",
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89 "security",
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90 "failure",
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91 "catastrophe",
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92 "info",
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93 "verbose",
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94 "debug"
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95 };
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96
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97 static int can_log[] = {
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98 1, // warning
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99 1, // config
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100 1, // security
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101 1, // failure
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102 1, // catastrophe
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103 1, // info
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104 0, // verbose
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105 0 // debug
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106 };
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107
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108 int init_log_file(LogConfig *cfg) {
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109 if(is_initialized) {
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110 return 0;
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111 }
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112
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113 /* open the log file */
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114 mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
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115 log_file_fd = open(cfg->file, O_WRONLY | O_CREAT | O_APPEND, mode);
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116 if(log_file_fd == -1) {
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117 log_ereport(LOG_FAILURE, "Cannot open log file %s: %s", cfg->file, strerror(errno));
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118 return -1;
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119 }
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120
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121 if(!strcmp(cfg->level, "ERROR")) {
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122 can_log[LOG_WARN] = 0;
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123 can_log[LOG_INFORM] = 0;
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124 } else if(!strcmp(cfg->level, "WARNING")) {
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125 can_log[LOG_INFORM] = 0;
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126 } else if(!strcmp(cfg->level, "VERBOSE")) {
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127 can_log[LOG_VERBOSE] = 1;
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128 } else if(!strcmp(cfg->level, "DEBUG")) {
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129 can_log[LOG_VERBOSE] = 1;
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130 can_log[LOG_DEBUG] = 1;
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131 }
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132
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133 if(cfg->log_stdout) {
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134 // TODO
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135 }
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136 if(cfg->log_stderr) {
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137 // TODO
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138 }
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141 is_initialized = 1;
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142
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143 /* if ui_buffer is not NULL, write it to the log file */
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144 if(ui_buffer) {
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145 size_t len = ui_buffer->length;
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146 size_t r;
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147 while(len > 0) {
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148 r = write(log_file_fd, ui_buffer->ptr, ui_buffer->length);
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149 len -= r;
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150 }
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151
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152 sbuf_free(ui_buffer);
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153 }
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154
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155 return 0;
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156 }
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158 void log_uninitialized_writeln(char *str, size_t len) {
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159 printf("%.*s\n", (int)len, str);
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160
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161 if(ui_buffer == NULL) {
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162 ui_buffer = sbuf_new(1024);
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163 if(ui_buffer == NULL) {
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164 return; /* TODO: critical error, exit */
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165 }
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166 }
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167
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168 sstr_t s;
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169 s.ptr = str;
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170 s.length = len;
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171
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172 sbuf_append(ui_buffer, s);
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173 sbuf_put(ui_buffer, '\n');
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174 }
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175
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176 void log_file_writeln(char *str, size_t len) {
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177 if(!is_initialized) {
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178 log_uninitialized_writeln(str, len);
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179 return;
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180 }
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181
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182 struct iovec io[] = {
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183 { str, len },
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184 { "\n", 1}
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185 };
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186
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187 writev(log_file_fd, io, 2); /* TODO: aio? */
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188 if(!main_is_daemon()) {
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189 writev(STDOUT_FILENO, io, 2);
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190 }
167
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191
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192 if(log_dup_count > 0) {
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193 char *msg = malloc(len + 1);
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194 memcpy(msg, str, len);
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195 msg[len] = '\n';
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196
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197 pthread_mutex_lock(&mutex);
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198 UCX_FOREACH(elm, log_dup_list) {
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199 LogDup *dup = elm->data;
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200 dup->write(dup->cookie, msg, len + 1);
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201 }
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202 pthread_mutex_unlock(&mutex);
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203
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204 free(msg);
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205 }
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206 }
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207
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208 sstr_t log_get_prefix(int level) {
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209 time_t t = time(NULL);
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210
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211 sstr_t d;
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212 d.ptr = NULL;
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213 d.length = 0;
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214
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215 struct tm date;
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216 localtime_r(&t, &date);
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217
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218 char *buf = malloc(64);
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219 int len = snprintf(
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220 buf,
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221 64,
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222 "[%02d/%s/%d:%02d:%02d:%02d] %s : ",
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223 date.tm_mday,
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224 log_date_month[date.tm_mon],
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225 1900 + date.tm_year,
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226 date.tm_hour,
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227 date.tm_min,
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228 date.tm_sec,
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229 log_levels[level]);
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230
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231 if(len > 0) {
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232 d.ptr = buf;
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233 d.length = len;
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234 }
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235
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236 return d;
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237 }
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238
167
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239 void log_add_logdup(LogDup *dup) {
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240 pthread_mutex_lock(&mutex);
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241 log_dup_list = ucx_list_append(log_dup_list, dup);
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242 ws_atomic_inc32(&log_dup_count);
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243 pthread_mutex_unlock(&mutex);
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244 }
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245
176
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246 void log_remove_logdup(LogDup *ldup) {
167
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247 pthread_mutex_lock(&mutex);
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248 UcxList *elm = log_dup_list;
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249 while(elm) {
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250 if(elm->data == ldup) {
167
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251 log_dup_list = ucx_list_remove(log_dup_list, elm);
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252 ws_atomic_dec32(&log_dup_count);
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253 break;
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254 }
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255 elm = elm->next;
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256 }
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257 pthread_mutex_unlock(&mutex);
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258 }
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259
28
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260
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261 /*
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262 * log api functions
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263 */
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264
82
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265 int log_ereport(int degree, const char *format, ...) {
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266 va_list args;
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267 va_start(args, format);
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268 int ret = log_ereport_v(degree, format, args);
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269 va_end(args);
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270 return ret;
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271 }
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272
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273 int log_ereport_v(int degree, const char *format, va_list args) {
166
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274 if(degree < 0 || degree > 7) {
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275 return 0;
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276 }
166
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277 if(!can_log[degree]) {
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278 return 0;
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279 }
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280
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281 sstr_t lmsg;
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282 lmsg.ptr = NULL;
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283
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284 /* create log message prefix */
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285 sstr_t lpre = log_get_prefix(degree);
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286
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287 /* format message */
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288 int len = vasprintf(&lmsg.ptr, format, args);
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289 lmsg.length = len;
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290
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291 /* create message string */
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292 sstr_t message = sstrcat(2, lpre, lmsg);
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293
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294 /* write message to the log file */
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295 log_file_writeln(message.ptr, message.length);
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296
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297 /* cleanup */
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298 free(lmsg.ptr);
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299 free(lpre.ptr);
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300 free(message.ptr);
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301
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302 return 0;
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303 }
45
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304
82
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305 int log_error(int degree, const char *func, Session *sn, Request *rq,
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306 const char *format, ...)
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307 {
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308 va_list args;
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309 va_start(args, format);
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310 int ret = log_error_v(degree, func, sn, rq, format, args);
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311 va_end(args);
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312 return ret;
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313 }
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314
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315 int log_error_v(int degree, const char *func, Session *sn, Request *rq,
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316 const char *format, va_list args)
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317 {
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318 // TODO: implement
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319 return log_ereport(degree, format, args);
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320 }
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321
45
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322
87
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323 void ws_log_assert(const char *file, const char *func, int line) {
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324 log_ereport(
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325 LOG_CATASTROPHE,
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326 "assertion failed: %s: %s:%d",
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327 file,
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328 func,
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329 line);
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330 exit(-1);
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331 }
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332
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333
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334 /*
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335 * access log
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336 * This source file only manages access log files. IO is performed directly
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337 * by AddLog safs.
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338 */
256
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339 LogFile* get_access_log_file(scstr_t file) {
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340 // TODO: this looks dubious
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341
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342 if(!access_log_files) {
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343 access_log_files = ucx_map_new(4);
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344 }
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345
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346 if(file.ptr == NULL || file.length == 0) {
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347 return NULL;
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348 }
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349
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350 LogFile *log = ucx_map_sstr_get(access_log_files, file);
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351 if(log != NULL) {
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352 ws_atomic_inc32(&log->ref);
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353 return log;
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354 }
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355
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356 // the log file is not opened
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357 // check first if we can open it
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358 FILE *out = fopen(file.ptr, "a");
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359 if(out == NULL) {
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360 return NULL;
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361 }
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362
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363 // create LogFile object
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364 log = calloc(1, sizeof(LogFile));
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365 log->file = out;
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366 log->ref = 1;
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367
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368 // add access log to the map
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369 ucx_map_sstr_put(access_log_files, file, log);
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370
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371 return log;
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372 }
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373

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