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