src/server/daemon/log.c

Sat, 19 Jan 2013 20:13:07 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 19 Jan 2013 20:13:07 +0100
changeset 48
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parent 45
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child 60
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permissions
-rw-r--r--

fixed some memory leaks

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

mercurial