Mercurial > hg > nginx
annotate src/os/unix/ngx_files.c @ 6241:387696b36c29
Fixed building --with-debug, broken by 6fce16b1fc10.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Wed, 02 Sep 2015 19:45:40 +0300 |
parents | 6fce16b1fc10 |
children | 8f6d753c1953 |
rev | line source |
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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12 #if (NGX_THREADS) |
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13 #include <ngx_thread_pool.h> |
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14 static void ngx_thread_read_handler(void *data, ngx_log_t *log); |
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15 #endif |
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16 |
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17 |
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18 #if (NGX_HAVE_FILE_AIO) |
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19 |
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20 ngx_uint_t ngx_file_aio = 1; |
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21 |
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22 #endif |
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23 |
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24 |
561 | 25 ssize_t |
26 ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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27 { |
561 | 28 ssize_t n; |
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29 |
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30 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
461 | 31 "read: %d, %p, %uz, %O", file->fd, buf, size, offset); |
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469 | 33 #if (NGX_HAVE_PREAD) |
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34 |
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35 n = pread(file->fd, buf, size, offset); |
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36 |
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37 if (n == -1) { |
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38 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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39 "pread() \"%s\" failed", file->name.data); |
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40 return NGX_ERROR; |
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41 } |
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42 |
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43 #else |
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45 if (file->sys_offset != offset) { |
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46 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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47 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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48 "lseek() \"%s\" failed", file->name.data); |
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49 return NGX_ERROR; |
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50 } |
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51 |
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52 file->sys_offset = offset; |
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53 } |
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54 |
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55 n = read(file->fd, buf, size); |
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56 |
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57 if (n == -1) { |
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58 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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59 "read() \"%s\" failed", file->name.data); |
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60 return NGX_ERROR; |
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61 } |
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62 |
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63 file->sys_offset += n; |
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64 |
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65 #endif |
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66 |
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67 file->offset += n; |
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68 |
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69 return n; |
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70 } |
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71 |
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72 |
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73 #if (NGX_THREADS) |
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74 |
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75 typedef struct { |
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76 ngx_fd_t fd; |
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77 u_char *buf; |
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78 size_t size; |
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79 off_t offset; |
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80 |
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81 size_t read; |
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82 ngx_err_t err; |
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83 } ngx_thread_read_ctx_t; |
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84 |
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85 |
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86 ssize_t |
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87 ngx_thread_read(ngx_thread_task_t **taskp, ngx_file_t *file, u_char *buf, |
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88 size_t size, off_t offset, ngx_pool_t *pool) |
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89 { |
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90 ngx_thread_task_t *task; |
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91 ngx_thread_read_ctx_t *ctx; |
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92 |
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93 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
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94 "thread read: %d, %p, %uz, %O", |
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95 file->fd, buf, size, offset); |
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96 |
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97 task = *taskp; |
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98 |
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99 if (task == NULL) { |
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100 task = ngx_thread_task_alloc(pool, sizeof(ngx_thread_read_ctx_t)); |
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101 if (task == NULL) { |
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102 return NGX_ERROR; |
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103 } |
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104 |
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105 task->handler = ngx_thread_read_handler; |
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106 |
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107 *taskp = task; |
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108 } |
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109 |
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110 ctx = task->ctx; |
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111 |
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112 if (task->event.complete) { |
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113 task->event.complete = 0; |
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114 |
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115 if (ctx->err) { |
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116 ngx_log_error(NGX_LOG_CRIT, file->log, ctx->err, |
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117 "pread() \"%s\" failed", file->name.data); |
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118 return NGX_ERROR; |
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119 } |
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120 |
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121 return ctx->read; |
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122 } |
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123 |
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124 ctx->fd = file->fd; |
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125 ctx->buf = buf; |
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126 ctx->size = size; |
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127 ctx->offset = offset; |
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128 |
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129 if (file->thread_handler(task, file) != NGX_OK) { |
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130 return NGX_ERROR; |
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131 } |
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132 |
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133 return NGX_AGAIN; |
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134 } |
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135 |
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136 |
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137 #if (NGX_HAVE_PREAD) |
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138 |
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139 static void |
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140 ngx_thread_read_handler(void *data, ngx_log_t *log) |
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141 { |
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142 ngx_thread_read_ctx_t *ctx = data; |
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143 |
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144 ssize_t n; |
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145 |
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146 ngx_log_debug0(NGX_LOG_DEBUG_CORE, log, 0, "thread read handler"); |
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147 |
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148 n = pread(ctx->fd, ctx->buf, ctx->size, ctx->offset); |
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149 |
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150 if (n == -1) { |
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151 ctx->err = ngx_errno; |
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152 |
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153 } else { |
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154 ctx->read = n; |
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155 ctx->err = 0; |
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156 } |
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157 |
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158 #if 0 |
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159 ngx_time_update(); |
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160 #endif |
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161 |
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162 ngx_log_debug4(NGX_LOG_DEBUG_CORE, log, 0, |
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163 "pread: %z (err: %i) of %uz @%O", |
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164 n, ctx->err, ctx->size, ctx->offset); |
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165 } |
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166 |
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167 #else |
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168 |
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169 #error pread() is required! |
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170 |
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171 #endif |
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172 |
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173 #endif /* NGX_THREADS */ |
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174 |
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175 |
561 | 176 ssize_t |
177 ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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178 { |
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179 ssize_t n, written; |
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180 |
461 | 181 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
182 "write: %d, %p, %uz, %O", file->fd, buf, size, offset); | |
183 | |
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184 written = 0; |
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185 |
469 | 186 #if (NGX_HAVE_PWRITE) |
182
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187 |
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188 for ( ;; ) { |
3657 | 189 n = pwrite(file->fd, buf + written, size, offset); |
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190 |
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191 if (n == -1) { |
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192 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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193 "pwrite() \"%s\" failed", file->name.data); |
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194 return NGX_ERROR; |
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195 } |
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196 |
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197 file->offset += n; |
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198 written += n; |
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199 |
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200 if ((size_t) n == size) { |
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201 return written; |
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202 } |
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203 |
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204 offset += n; |
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205 size -= n; |
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206 } |
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207 |
182
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208 #else |
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209 |
190
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210 if (file->sys_offset != offset) { |
182
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211 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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212 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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213 "lseek() \"%s\" failed", file->name.data); |
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214 return NGX_ERROR; |
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215 } |
191
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216 |
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217 file->sys_offset = offset; |
182
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218 } |
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219 |
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220 for ( ;; ) { |
3657 | 221 n = write(file->fd, buf + written, size); |
182
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222 |
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223 if (n == -1) { |
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224 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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225 "write() \"%s\" failed", file->name.data); |
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226 return NGX_ERROR; |
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227 } |
182
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228 |
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229 file->offset += n; |
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230 written += n; |
182
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231 |
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232 if ((size_t) n == size) { |
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233 return written; |
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234 } |
182
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235 |
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236 size -= n; |
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237 } |
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238 #endif |
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239 } |
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240 |
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241 |
561 | 242 ngx_fd_t |
1046 | 243 ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access) |
303
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244 { |
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245 ngx_fd_t fd; |
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246 |
1046 | 247 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, |
248 access ? access : 0600); | |
303
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249 |
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250 if (fd != -1 && !persistent) { |
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251 (void) unlink((const char *) name); |
303
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252 } |
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253 |
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254 return fd; |
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255 } |
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256 |
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257 |
461 | 258 #define NGX_IOVS 8 |
259 | |
561 | 260 ssize_t |
261 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, | |
262 ngx_pool_t *pool) | |
74
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263 { |
290
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264 u_char *prev; |
74
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265 size_t size; |
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266 ssize_t total, n; |
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267 ngx_err_t err; |
461 | 268 ngx_array_t vec; |
269 struct iovec *iov, iovs[NGX_IOVS]; | |
74
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270 |
461 | 271 /* use pwrite() if there is the only buf in a chain */ |
74
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272 |
170
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273 if (cl->next == NULL) { |
343
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274 return ngx_write_file(file, cl->buf->pos, |
6bdf858bff8c
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275 (size_t) (cl->buf->last - cl->buf->pos), |
194
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276 offset); |
74
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277 } |
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278 |
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279 total = 0; |
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280 |
461 | 281 vec.elts = iovs; |
282 vec.size = sizeof(struct iovec); | |
577 | 283 vec.nalloc = NGX_IOVS; |
461 | 284 vec.pool = pool; |
170
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285 |
461 | 286 do { |
287 prev = NULL; | |
288 iov = NULL; | |
289 size = 0; | |
170
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290 |
461 | 291 vec.nelts = 0; |
292 | |
293 /* create the iovec and coalesce the neighbouring bufs */ | |
170
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294 |
461 | 295 while (cl && vec.nelts < IOV_MAX) { |
296 if (prev == cl->buf->pos) { | |
297 iov->iov_len += cl->buf->last - cl->buf->pos; | |
74
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298 |
461 | 299 } else { |
501 | 300 iov = ngx_array_push(&vec); |
301 if (iov == NULL) { | |
461 | 302 return NGX_ERROR; |
303 } | |
304 | |
305 iov->iov_base = (void *) cl->buf->pos; | |
306 iov->iov_len = cl->buf->last - cl->buf->pos; | |
307 } | |
308 | |
309 size += cl->buf->last - cl->buf->pos; | |
310 prev = cl->buf->last; | |
311 cl = cl->next; | |
170
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312 } |
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313 |
461 | 314 /* use pwrite() if there is the only iovec buffer */ |
170
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315 |
461 | 316 if (vec.nelts == 1) { |
317 iov = vec.elts; | |
4221
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Fixed another return in unix ngx_write_chain_to_file().
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318 |
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319 n = ngx_write_file(file, (u_char *) iov[0].iov_base, |
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Fixed another return in unix ngx_write_chain_to_file().
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320 iov[0].iov_len, offset); |
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Fixed another return in unix ngx_write_chain_to_file().
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321 |
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Fixed another return in unix ngx_write_chain_to_file().
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322 if (n == NGX_ERROR) { |
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323 return n; |
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Fixed another return in unix ngx_write_chain_to_file().
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324 } |
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Fixed another return in unix ngx_write_chain_to_file().
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325 |
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Fixed another return in unix ngx_write_chain_to_file().
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326 return total + n; |
461 | 327 } |
170
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328 |
461 | 329 if (file->sys_offset != offset) { |
330 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
331 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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332 "lseek() \"%s\" failed", file->name.data); |
461 | 333 return NGX_ERROR; |
334 } | |
74
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335 |
461 | 336 file->sys_offset = offset; |
337 } | |
338 | |
6240
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339 eintr: |
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340 |
461 | 341 n = writev(file->fd, vec.elts, vec.nelts); |
342 | |
343 if (n == -1) { | |
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344 err = ngx_errno; |
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Writing to some file systems can be interrupted.
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345 |
6fce16b1fc10
Writing to some file systems can be interrupted.
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346 if (err == NGX_EINTR) { |
6241
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Fixed building --with-debug, broken by 6fce16b1fc10.
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347 ngx_log_debug0(NGX_LOG_DEBUG_CORE, file->log, err, |
6240
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348 "writev() was interrupted"); |
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Writing to some file systems can be interrupted.
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349 goto eintr; |
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Writing to some file systems can be interrupted.
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350 } |
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351 |
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352 ngx_log_error(NGX_LOG_CRIT, file->log, err, |
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353 "writev() \"%s\" failed", file->name.data); |
154
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354 return NGX_ERROR; |
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355 } |
191
71ce40b3c37b
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diff
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356 |
461 | 357 if ((size_t) n != size) { |
358 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
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359 "writev() \"%s\" has written only %z of %uz", |
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360 file->name.data, n, size); |
461 | 361 return NGX_ERROR; |
362 } | |
74
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363 |
4919
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Core: added debug logging of writev() in ngx_write_chain_to_file().
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364 ngx_log_debug2(NGX_LOG_DEBUG_CORE, file->log, 0, |
bd6299189b49
Core: added debug logging of writev() in ngx_write_chain_to_file().
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365 "writev: %d, %z", file->fd, n); |
bd6299189b49
Core: added debug logging of writev() in ngx_write_chain_to_file().
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366 |
461 | 367 file->sys_offset += n; |
368 file->offset += n; | |
4938
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Core: fixed ngx_write_chain_to_file() with IOV_MAX reached.
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369 offset += n; |
4220
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370 total += n; |
74
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371 |
461 | 372 } while (cl); |
73
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diff
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373 |
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374 return total; |
73
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375 } |
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376 |
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377 |
561 | 378 ngx_int_t |
681 | 379 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s) |
380 { | |
381 struct timeval tv[2]; | |
382 | |
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383 tv[0].tv_sec = ngx_time(); |
681 | 384 tv[0].tv_usec = 0; |
385 tv[1].tv_sec = s; | |
386 tv[1].tv_usec = 0; | |
387 | |
388 if (utimes((char *) name, tv) != -1) { | |
389 return NGX_OK; | |
390 } | |
391 | |
392 return NGX_ERROR; | |
393 } | |
394 | |
395 | |
396 ngx_int_t | |
3651 | 397 ngx_create_file_mapping(ngx_file_mapping_t *fm) |
398 { | |
399 fm->fd = ngx_open_file(fm->name, NGX_FILE_RDWR, NGX_FILE_TRUNCATE, | |
400 NGX_FILE_DEFAULT_ACCESS); | |
401 if (fm->fd == NGX_INVALID_FILE) { | |
402 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
403 ngx_open_file_n " \"%s\" failed", fm->name); | |
404 return NGX_ERROR; | |
405 } | |
406 | |
407 if (ftruncate(fm->fd, fm->size) == -1) { | |
408 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
409 "ftruncate() \"%s\" failed", fm->name); | |
410 goto failed; | |
411 } | |
412 | |
413 fm->addr = mmap(NULL, fm->size, PROT_READ|PROT_WRITE, MAP_SHARED, | |
414 fm->fd, 0); | |
415 if (fm->addr != MAP_FAILED) { | |
416 return NGX_OK; | |
417 } | |
418 | |
419 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
420 "mmap(%uz) \"%s\" failed", fm->size, fm->name); | |
421 | |
422 failed: | |
423 | |
424 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
425 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
426 ngx_close_file_n " \"%s\" failed", fm->name); | |
427 } | |
428 | |
429 return NGX_ERROR; | |
430 } | |
431 | |
432 | |
433 void | |
434 ngx_close_file_mapping(ngx_file_mapping_t *fm) | |
435 { | |
436 if (munmap(fm->addr, fm->size) == -1) { | |
437 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
438 "munmap(%uz) \"%s\" failed", fm->size, fm->name); | |
439 } | |
440 | |
441 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
442 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
443 ngx_close_file_n " \"%s\" failed", fm->name); | |
444 } | |
445 } | |
446 | |
447 | |
448 ngx_int_t | |
561 | 449 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
186
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450 { |
290
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451 dir->dir = opendir((const char *) name->data); |
186
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452 |
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453 if (dir->dir == NULL) { |
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454 return NGX_ERROR; |
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455 } |
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456 |
457 | 457 dir->valid_info = 0; |
186
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458 |
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459 return NGX_OK; |
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460 } |
561 | 461 |
462 | |
727 | 463 ngx_int_t |
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464 ngx_read_dir(ngx_dir_t *dir) |
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465 { |
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466 dir->de = readdir(dir->dir); |
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467 |
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468 if (dir->de) { |
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469 #if (NGX_HAVE_D_TYPE) |
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470 dir->type = dir->de->d_type; |
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471 #else |
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472 dir->type = 0; |
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473 #endif |
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474 return NGX_OK; |
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475 } |
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476 |
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477 return NGX_ERROR; |
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478 } |
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479 |
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480 |
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481 ngx_int_t |
727 | 482 ngx_open_glob(ngx_glob_t *gl) |
483 { | |
1980 | 484 int n; |
485 | |
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486 n = glob((char *) gl->pattern, 0, NULL, &gl->pglob); |
1980 | 487 |
488 if (n == 0) { | |
489 return NGX_OK; | |
490 } | |
491 | |
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492 #ifdef GLOB_NOMATCH |
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493 |
1980 | 494 if (n == GLOB_NOMATCH && gl->test) { |
727 | 495 return NGX_OK; |
496 } | |
497 | |
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498 #endif |
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499 |
727 | 500 return NGX_ERROR; |
501 } | |
502 | |
503 | |
504 ngx_int_t | |
505 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name) | |
506 { | |
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507 size_t count; |
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508 |
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509 #ifdef GLOB_NOMATCH |
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510 count = (size_t) gl->pglob.gl_pathc; |
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511 #else |
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512 count = (size_t) gl->pglob.gl_matchc; |
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513 #endif |
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514 |
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515 if (gl->n < count) { |
727 | 516 |
517 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]); | |
518 name->data = (u_char *) gl->pglob.gl_pathv[gl->n]; | |
519 gl->n++; | |
520 | |
521 return NGX_OK; | |
522 } | |
523 | |
524 return NGX_DONE; | |
525 } | |
526 | |
527 | |
528 void | |
529 ngx_close_glob(ngx_glob_t *gl) | |
530 { | |
531 globfree(&gl->pglob); | |
532 } | |
533 | |
534 | |
611 | 535 ngx_err_t |
536 ngx_trylock_fd(ngx_fd_t fd) | |
561 | 537 { |
538 struct flock fl; | |
539 | |
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540 ngx_memzero(&fl, sizeof(struct flock)); |
611 | 541 fl.l_type = F_WRLCK; |
561 | 542 fl.l_whence = SEEK_SET; |
611 | 543 |
544 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
545 return ngx_errno; | |
546 } | |
547 | |
548 return 0; | |
549 } | |
550 | |
551 | |
552 ngx_err_t | |
553 ngx_lock_fd(ngx_fd_t fd) | |
554 { | |
555 struct flock fl; | |
556 | |
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557 ngx_memzero(&fl, sizeof(struct flock)); |
561 | 558 fl.l_type = F_WRLCK; |
611 | 559 fl.l_whence = SEEK_SET; |
561 | 560 |
611 | 561 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
562 return ngx_errno; | |
561 | 563 } |
564 | |
611 | 565 return 0; |
561 | 566 } |
567 | |
568 | |
611 | 569 ngx_err_t |
570 ngx_unlock_fd(ngx_fd_t fd) | |
561 | 571 { |
572 struct flock fl; | |
573 | |
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574 ngx_memzero(&fl, sizeof(struct flock)); |
561 | 575 fl.l_type = F_UNLCK; |
611 | 576 fl.l_whence = SEEK_SET; |
561 | 577 |
611 | 578 if (fcntl(fd, F_SETLK, &fl) == -1) { |
579 return ngx_errno; | |
561 | 580 } |
581 | |
611 | 582 return 0; |
561 | 583 } |
2129 | 584 |
585 | |
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586 #if (NGX_HAVE_POSIX_FADVISE) && !(NGX_HAVE_F_READAHEAD) |
3322
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587 |
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588 ngx_int_t |
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589 ngx_read_ahead(ngx_fd_t fd, size_t n) |
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590 { |
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591 int err; |
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592 |
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593 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); |
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594 |
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595 if (err == 0) { |
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596 return 0; |
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597 } |
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598 |
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599 ngx_set_errno(err); |
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600 return NGX_FILE_ERROR; |
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601 } |
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602 |
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603 #endif |
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604 |
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605 |
2129 | 606 #if (NGX_HAVE_O_DIRECT) |
607 | |
608 ngx_int_t | |
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609 ngx_directio_on(ngx_fd_t fd) |
2129 | 610 { |
611 int flags; | |
612 | |
613 flags = fcntl(fd, F_GETFL); | |
614 | |
615 if (flags == -1) { | |
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616 return NGX_FILE_ERROR; |
2129 | 617 } |
618 | |
619 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
620 } | |
621 | |
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622 |
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623 ngx_int_t |
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624 ngx_directio_off(ngx_fd_t fd) |
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625 { |
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626 int flags; |
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627 |
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628 flags = fcntl(fd, F_GETFL); |
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629 |
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630 if (flags == -1) { |
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631 return NGX_FILE_ERROR; |
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632 } |
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633 |
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634 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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635 } |
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636 |
2129 | 637 #endif |
2615 | 638 |
639 | |
640 #if (NGX_HAVE_STATFS) | |
641 | |
642 size_t | |
643 ngx_fs_bsize(u_char *name) | |
644 { | |
645 struct statfs fs; | |
646 | |
647 if (statfs((char *) name, &fs) == -1) { | |
648 return 512; | |
649 } | |
650 | |
651 if ((fs.f_bsize % 512) != 0) { | |
652 return 512; | |
653 } | |
654 | |
655 return (size_t) fs.f_bsize; | |
656 } | |
657 | |
658 #elif (NGX_HAVE_STATVFS) | |
659 | |
660 size_t | |
661 ngx_fs_bsize(u_char *name) | |
662 { | |
663 struct statvfs fs; | |
664 | |
665 if (statvfs((char *) name, &fs) == -1) { | |
666 return 512; | |
667 } | |
668 | |
669 if ((fs.f_frsize % 512) != 0) { | |
670 return 512; | |
671 } | |
672 | |
673 return (size_t) fs.f_frsize; | |
674 } | |
675 | |
676 #else | |
677 | |
678 size_t | |
679 ngx_fs_bsize(u_char *name) | |
680 { | |
681 return 512; | |
682 } | |
683 | |
684 #endif |