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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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11 static ngx_uint_t ngx_temp_number;
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12 static ngx_uint_t ngx_random;
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13
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14
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15 int ngx_write_chain_to_temp_file(ngx_temp_file_t *tf, ngx_chain_t *chain)
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16 {
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17 int rc;
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18
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19 if (tf->file.fd == NGX_INVALID_FILE) {
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20 rc = ngx_create_temp_file(&tf->file, tf->path, tf->pool,
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21 tf->persistent);
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22
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23 if (rc == NGX_ERROR || rc == NGX_AGAIN) {
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24 return rc;
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25 }
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26
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27 if (!tf->persistent && tf->warn) {
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28 ngx_log_error(NGX_LOG_WARN, tf->file.log, 0, tf->warn);
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29 }
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30 }
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31
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32 return ngx_write_chain_to_file(&tf->file, chain, tf->offset, tf->pool);
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33 }
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34
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35
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36 int ngx_create_temp_file(ngx_file_t *file, ngx_path_t *path,
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37 ngx_pool_t *pool, int persistent)
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38 {
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39 int num;
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40 ngx_err_t err;
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41
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42 file->name.len = path->name.len + 1 + path->len + 10;
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43
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44 ngx_test_null(file->name.data, ngx_palloc(pool, file->name.len + 1),
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45 NGX_ERROR);
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46
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47 #if 0
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48 for (i = 0; i < file->name.len; i++) {
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49 file->name.data[i] = 'X';
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50 }
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51 #endif
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52
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53 ngx_memcpy(file->name.data, path->name.data, path->name.len);
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54
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55 num = ngx_next_temp_number(0);
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56
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57 for ( ;; ) {
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58 ngx_snprintf((char *)
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59 (file->name.data + path->name.len + 1 + path->len),
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60 11, "%010u", num);
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61
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62 ngx_create_hashed_filename(file, path);
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63
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64 #if 1
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65 file->fd = ngx_open_tempfile(file->name.data, persistent);
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66 #else
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67 file->fd = ngx_open_tempfile(file->name.data, 1);
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68 #endif
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69
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70 ngx_log_debug1(NGX_LOG_DEBUG_CORE, file->log, 0,
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71 "temp fd:%d", file->fd);
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72
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73 if (file->fd != NGX_INVALID_FILE) {
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74 return NGX_OK;
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75 }
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76
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77 err = ngx_errno;
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78
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79 if (err == NGX_EEXIST) {
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80 num = ngx_next_temp_number(1);
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81 continue;
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82 }
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83
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84 if ((path->level[0] == 0)
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85 || (err != NGX_ENOENT
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86 #if (WIN32)
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87 && err != NGX_ENOTDIR
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88 #endif
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89 )) {
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90 ngx_log_error(NGX_LOG_CRIT, file->log, err,
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91 ngx_open_tempfile_n " \"%s\" failed",
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92 file->name.data);
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93 return NGX_ERROR;
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94 }
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95
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96 if (ngx_create_path(file, path) == NGX_ERROR) {
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97 return NGX_ERROR;
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98 }
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99 }
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100 }
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101
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102
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103 void ngx_create_hashed_filename(ngx_file_t *file, ngx_path_t *path)
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104 {
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105 int i, name, pos;
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106 size_t level;
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107
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108 name = file->name.len;
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109 pos = path->name.len + 1;
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110
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111 file->name.data[path->name.len + path->len] = '/';
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112
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113 for (i = 0; i < 3; i++) {
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114 level = path->level[i];
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115
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116 if (level == 0) {
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117 break;
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118 }
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119
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120 name -= level;
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121 file->name.data[pos - 1] = '/';
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122 ngx_memcpy(&file->name.data[pos], &file->name.data[name], level);
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123 pos += level + 1;
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124 }
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125
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126 ngx_log_debug1(NGX_LOG_DEBUG_CORE, file->log, 0,
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127 "hashed path: %s", file->name.data);
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128 }
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129
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130
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131 int ngx_create_path(ngx_file_t *file, ngx_path_t *path)
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132 {
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133 int i, pos;
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134 ngx_err_t err;
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135
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136 pos = path->name.len;
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137
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138 for (i = 0; i < 3; i++) {
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139 if (path->level[i] == 0) {
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140 break;
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141 }
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142
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143 pos += path->level[i] + 1;
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144
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145 file->name.data[pos] = '\0';
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146
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147 ngx_log_debug1(NGX_LOG_DEBUG_CORE, file->log, 0,
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148 "temp file: \"%s\"", file->name.data);
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149
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150 if (ngx_create_dir(file->name.data) == NGX_FILE_ERROR) {
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151 err = ngx_errno;
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152 if (err != NGX_EEXIST) {
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153 ngx_log_error(NGX_LOG_CRIT, file->log, err,
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154 ngx_create_dir_n " \"%s\" failed",
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155 file->name.data);
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156 return NGX_ERROR;
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157 }
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158 }
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159
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160 file->name.data[pos] = '/';
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161 }
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162
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163 return NGX_OK;
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164 }
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165
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166
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167 void ngx_init_temp_number()
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168 {
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169 ngx_random = 0;
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170
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171 ngx_temp_number = ngx_random;
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172
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173 while (ngx_random < 10000) {
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174 ngx_random = 123456;
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175 }
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176 }
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177
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178
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179 ngx_uint_t ngx_next_temp_number(ngx_uint_t collision)
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180 {
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181 if (collision) {
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182 ngx_temp_number += ngx_random;
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183 }
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184
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185 return ngx_temp_number++;
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186 }
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187
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188
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189 char *ngx_conf_set_path_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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190 {
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191 char *p = conf;
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192
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193 ngx_int_t level;
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194 ngx_uint_t i, n;
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195 ngx_str_t *value;
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196 ngx_path_t *path, **pp;
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197
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198 pp = (ngx_path_t **) (p + cmd->offset);
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199
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200 if (*pp) {
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201 return "is duplicate";
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202 }
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203
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204 /* TODO: check duplicate in cf->cycle->pathes */
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205
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206 ngx_test_null(path, ngx_pcalloc(cf->pool, sizeof(ngx_path_t)),
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207 NGX_CONF_ERROR);
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208
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209 *pp = path;
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210
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211 ngx_test_null(pp, ngx_push_array(&cf->cycle->pathes), NGX_CONF_ERROR);
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212 *pp = path;
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213
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214 value = (ngx_str_t *) cf->args->elts;
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215
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216 path->name = value[1];
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217
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218 path->len = 0;
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219
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220 for (i = 0, n = 2; n < cf->args->nelts; i++, n++) {
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221 level = ngx_atoi(value[n].data, value[n].len);
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222 if (level == NGX_ERROR || level == 0) {
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223 return "invalid value";
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224 }
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225
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226 path->level[i] = level;
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227 path->len += level + 1;
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228 }
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229
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230 while (i < 3) {
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231 path->level[i++] = 0;
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232 }
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233
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234 path->gc_handler = (ngx_gc_handler_pt) cmd->post;
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235
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236 return NGX_CONF_OK;
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237 }
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