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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9
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10
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10
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11 static void ngx_log_write(ngx_log_t *log, u_char *errstr, size_t len);
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0
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12 static char *ngx_set_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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13
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14
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15 static ngx_command_t ngx_errlog_commands[] = {
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16
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17 {ngx_string("error_log"),
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18 NGX_MAIN_CONF|NGX_CONF_1MORE,
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19 ngx_set_error_log,
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20 0,
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21 0,
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22 NULL},
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23
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24 ngx_null_command
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25 };
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26
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27
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28 static ngx_core_module_t ngx_errlog_module_ctx = {
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29 ngx_string("errlog"),
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30 NULL,
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31 NULL
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32 };
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33
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34
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35 ngx_module_t ngx_errlog_module = {
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58
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36 NGX_MODULE_V1,
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37 &ngx_errlog_module_ctx, /* module context */
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38 ngx_errlog_commands, /* module directives */
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39 NGX_CORE_MODULE, /* module type */
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90
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40 NULL, /* init master */
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41 NULL, /* init module */
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90
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42 NULL, /* init process */
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43 NULL, /* init thread */
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44 NULL, /* exit thread */
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45 NULL, /* exit process */
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46 NULL, /* exit master */
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47 NGX_MODULE_V1_PADDING
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0
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48 };
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49
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50
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51 static ngx_log_t ngx_log;
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52 static ngx_open_file_t ngx_stderr;
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53
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54
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55 static const char *err_levels[] = {
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56 "stderr", "emerg", "alert", "crit", "error",
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57 "warn", "notice", "info", "debug"
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58 };
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59
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60 static const char *debug_levels[] = {
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61 "debug_core", "debug_alloc", "debug_mutex", "debug_event",
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62 "debug_http", "debug_imap"
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63 };
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64
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65
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4
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66 #if (NGX_HAVE_VARIADIC_MACROS)
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52
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67
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68 void
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69 ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
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70 const char *fmt, ...)
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71
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72 #else
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52
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73
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74 void
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75 ngx_log_error_core(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
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76 const char *fmt, va_list args)
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77
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78 #endif
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79 {
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4
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80 #if (NGX_HAVE_VARIADIC_MACROS)
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81 va_list args;
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82 #endif
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83 u_char errstr[NGX_MAX_ERROR_STR], *p, *last;
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84
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85 if (log->file->fd == NGX_INVALID_FILE) {
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86 return;
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87 }
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88
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89 last = errstr + NGX_MAX_ERROR_STR;
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90
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91 ngx_memcpy(errstr, ngx_cached_err_log_time.data,
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92 ngx_cached_err_log_time.len);
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93
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94 p = errstr + ngx_cached_err_log_time.len;
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95
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96 p = ngx_sprintf(p, " [%s] ", err_levels[level]);
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97
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98 /* pid#tid */
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99 p = ngx_sprintf(p, "%P#" NGX_TID_T_FMT ": ", ngx_log_pid, ngx_log_tid);
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100
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32
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101 if (log->connection) {
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102 p = ngx_sprintf(p, "*%uA ", log->connection);
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32
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103 }
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104
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105 #if (NGX_HAVE_VARIADIC_MACROS)
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106
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107 va_start(args, fmt);
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108 p = ngx_vsnprintf(p, last - p, fmt, args);
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109 va_end(args);
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110
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111 #else
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112
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113 p = ngx_vsnprintf(p, last - p, fmt, args);
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114
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115 #endif
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116
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117 if (err) {
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118
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119 if (p > last - 50) {
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120
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121 /* leave a space for an error code */
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122
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123 p = last - 50;
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124 *p++ = '.';
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125 *p++ = '.';
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126 *p++ = '.';
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127 }
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128
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129 #if (NGX_WIN32)
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130
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131 if ((unsigned) err >= 0x80000000) {
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132 p = ngx_snprintf(p, last - p, " (%Xd: ", err);
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133
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134 } else {
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135 p = ngx_snprintf(p, last - p, " (%d: ", err);
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136 }
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137
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138 #else
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139
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140 p = ngx_snprintf(p, last - p, " (%d: ", err);
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141
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142 #endif
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143
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144 p = ngx_strerror_r(err, p, last - p);
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145
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146 if (p < last) {
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147 *p++ = ')';
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148 }
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149 }
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150
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151 if (level != NGX_LOG_DEBUG && log->handler) {
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152 p = log->handler(log, p, last - p);
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153 }
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154
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155 ngx_log_write(log, errstr, p - errstr);
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156 }
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157
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158
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52
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159 static void
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160 ngx_log_write(ngx_log_t *log, u_char *errstr, size_t len)
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161 {
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162 #if (NGX_WIN32)
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163 u_long written;
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164
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165 if (len >= NGX_MAX_ERROR_STR - 1) {
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166 len = NGX_MAX_ERROR_STR - 2;
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167 }
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168
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169 errstr[len++] = CR;
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170 errstr[len++] = LF;
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171
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172 WriteFile(log->file->fd, errstr, len, &written, NULL);
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173
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174 #if 0
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175 if (WriteFile(log->file->fd, errstr, len, &written, NULL) == 0) {
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176 ngx_message_box("nginx", MB_OK, ngx_errno, "WriteFile() failed");
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177 }
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178 #endif
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179
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180 #else
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181
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182 if (len == NGX_MAX_ERROR_STR) {
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183 len--;
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184 }
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185
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186 errstr[len++] = LF;
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187
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188 (void) write(log->file->fd, errstr, len);
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189
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190 #endif
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191 }
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192
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193
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4
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194 #if !(NGX_HAVE_VARIADIC_MACROS)
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195
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52
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196 void ngx_cdecl
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197 ngx_log_error(ngx_uint_t level, ngx_log_t *log, ngx_err_t err,
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198 const char *fmt, ...)
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199 {
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200 va_list args;
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201
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202 if (log->log_level >= level) {
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203 va_start(args, fmt);
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204 ngx_log_error_core(level, log, err, fmt, args);
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205 va_end(args);
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206 }
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207 }
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208
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209
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52
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210 void ngx_cdecl
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211 ngx_log_debug_core(ngx_log_t *log, ngx_err_t err, const char *fmt, ...)
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212 {
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213 va_list args;
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214
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215 va_start(args, fmt);
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216 ngx_log_error_core(NGX_LOG_DEBUG, log, err, fmt, args);
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217 va_end(args);
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218 }
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219
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220 #endif
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221
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222
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52
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223 ngx_log_t *
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224 ngx_log_init(void)
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225 {
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226 ngx_log.file = &ngx_stderr;
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227 ngx_log.log_level = NGX_LOG_NOTICE;
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228
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229 #if (NGX_WIN32)
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230
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231 ngx_stderr.fd = ngx_open_file(NGX_ERROR_LOG_PATH, NGX_FILE_RDWR,
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232 NGX_FILE_CREATE_OR_OPEN|NGX_FILE_APPEND);
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233
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234 if (ngx_stderr.fd == NGX_INVALID_FILE) {
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235 ngx_message_box("nginx", MB_OK, ngx_errno,
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236 "Could not open error log file: "
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237 ngx_open_file_n " \"" NGX_ERROR_LOG_PATH "\" failed");
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238 return NULL;
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239 }
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240
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241 if (ngx_file_append_mode(ngx_stderr.fd) == NGX_ERROR) {
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242 ngx_message_box("nginx", MB_OK, ngx_errno,
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243 "Could not open error log file: "
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244 ngx_file_append_mode_n " \"" NGX_ERROR_LOG_PATH
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245 "\" failed");
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246 return NULL;
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247 }
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248
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249 #else
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250
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251 ngx_stderr.fd = STDERR_FILENO;
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252
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253 #endif
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254
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255 return &ngx_log;
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256 }
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257
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258
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52
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259 ngx_log_t *
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260 ngx_log_create_errlog(ngx_cycle_t *cycle, ngx_array_t *args)
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261 {
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262 ngx_log_t *log;
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263 ngx_str_t *value, *name;
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264
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265 if (args) {
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266 value = args->elts;
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267 name = &value[1];
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268
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269 } else {
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270 name = NULL;
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271 }
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272
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273 log = ngx_pcalloc(cycle->pool, sizeof(ngx_log_t));
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274 if (log == NULL) {
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275 return NULL;
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276 }
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277
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278 log->file = ngx_conf_open_file(cycle, name);
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279 if (log->file == NULL) {
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280 return NULL;
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281 }
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282
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283 return log;
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284 }
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285
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286
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287 char *
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288 ngx_set_error_log_levels(ngx_conf_t *cf, ngx_log_t *log)
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289 {
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290 ngx_uint_t i, n, d;
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291 ngx_str_t *value;
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292
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293 value = cf->args->elts;
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294
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295 for (i = 2; i < cf->args->nelts; i++) {
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296
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297 for (n = 1; n <= NGX_LOG_DEBUG; n++) {
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298 if (ngx_strcmp(value[i].data, err_levels[n]) == 0) {
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299
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300 if (log->log_level != 0) {
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301 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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302 "invalid log level \"%s\"",
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303 value[i].data);
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304 return NGX_CONF_ERROR;
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305 }
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306
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307 log->log_level = n;
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308 continue;
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309 }
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310 }
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311
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312 for (n = 0, d = NGX_LOG_DEBUG_FIRST; d <= NGX_LOG_DEBUG_LAST; d <<= 1) {
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313 if (ngx_strcmp(value[i].data, debug_levels[n++]) == 0) {
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314 if (log->log_level & ~NGX_LOG_DEBUG_ALL) {
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315 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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316 "invalid log level \"%s\"",
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317 value[i].data);
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318 return NGX_CONF_ERROR;
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319 }
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320
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321 log->log_level |= d;
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322 }
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323 }
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324
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325
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326 if (log->log_level == 0) {
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327 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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328 "invalid log level \"%s\"", value[i].data);
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329 return NGX_CONF_ERROR;
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330 }
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331 }
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332
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333 if (log->log_level == NGX_LOG_DEBUG) {
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334 log->log_level = NGX_LOG_DEBUG_ALL;
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335 }
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336
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337 return NGX_CONF_OK;
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338 }
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339
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340
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52
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341 static char *
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342 ngx_set_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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0
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343 {
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344 ngx_str_t *value;
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345
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346 value = cf->args->elts;
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347
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348 if (value[1].len == 6 && ngx_strcmp(value[1].data, "stderr") == 0) {
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349 cf->cycle->new_log->file->fd = ngx_stderr.fd;
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350 cf->cycle->new_log->file->name.len = 0;
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351 cf->cycle->new_log->file->name.data = NULL;
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352
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353 } else {
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354 cf->cycle->new_log->file->name = value[1];
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355
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356 if (ngx_conf_full_name(cf->cycle, &cf->cycle->new_log->file->name)
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357 == NGX_ERROR)
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358 {
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359 return NGX_CONF_ERROR;
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360 }
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361 }
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362
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363 return ngx_set_error_log_levels(cf, cf->cycle->new_log);
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364 }
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