Mercurial > hg > nginx
annotate src/os/unix/ngx_files.c @ 4126:bba9a5ccc6cd
Proxy: basic HTTP/1.1 support (including keepalive).
By default we still send requests using HTTP/1.0. This may be changed with
new proxy_http_version directive.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Thu, 15 Sep 2011 19:23:20 +0000 |
parents | cf80c0b0109a |
children | 4be8dd8dd547 d1d34de1a419 |
rev | line source |
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441
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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 #if (NGX_HAVE_FILE_AIO) |
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12 |
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13 ngx_uint_t ngx_file_aio = 1; |
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14 |
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15 #endif |
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16 |
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561 | 18 ssize_t |
19 ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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20 { |
561 | 21 ssize_t n; |
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22 |
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23 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
461 | 24 "read: %d, %p, %uz, %O", file->fd, buf, size, offset); |
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25 |
469 | 26 #if (NGX_HAVE_PREAD) |
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27 |
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28 n = pread(file->fd, buf, size, offset); |
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29 |
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30 if (n == -1) { |
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31 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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32 "pread() \"%s\" failed", file->name.data); |
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33 return NGX_ERROR; |
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34 } |
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35 |
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36 #else |
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37 |
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38 if (file->sys_offset != offset) { |
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39 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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40 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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41 "lseek() \"%s\" failed", file->name.data); |
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42 return NGX_ERROR; |
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43 } |
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44 |
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45 file->sys_offset = offset; |
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46 } |
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47 |
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48 n = read(file->fd, buf, size); |
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49 |
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50 if (n == -1) { |
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51 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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52 "read() \"%s\" failed", file->name.data); |
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53 return NGX_ERROR; |
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54 } |
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55 |
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56 file->sys_offset += n; |
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57 |
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58 #endif |
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59 |
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60 file->offset += n; |
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61 |
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62 return n; |
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63 } |
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64 |
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65 |
561 | 66 ssize_t |
67 ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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68 { |
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69 ssize_t n, written; |
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70 |
461 | 71 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
72 "write: %d, %p, %uz, %O", file->fd, buf, size, offset); | |
73 | |
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74 written = 0; |
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75 |
469 | 76 #if (NGX_HAVE_PWRITE) |
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77 |
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78 for ( ;; ) { |
3657 | 79 n = pwrite(file->fd, buf + written, size, offset); |
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80 |
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81 if (n == -1) { |
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82 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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83 "pwrite() \"%s\" failed", file->name.data); |
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84 return NGX_ERROR; |
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85 } |
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86 |
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87 file->offset += n; |
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88 written += n; |
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89 |
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90 if ((size_t) n == size) { |
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91 return written; |
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92 } |
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93 |
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94 offset += n; |
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95 size -= n; |
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96 } |
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97 |
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98 #else |
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99 |
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100 if (file->sys_offset != offset) { |
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101 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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102 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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103 "lseek() \"%s\" failed", file->name.data); |
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104 return NGX_ERROR; |
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105 } |
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106 |
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107 file->sys_offset = offset; |
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108 } |
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109 |
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110 for ( ;; ) { |
3657 | 111 n = write(file->fd, buf + written, size); |
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112 |
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113 if (n == -1) { |
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114 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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115 "write() \"%s\" failed", file->name.data); |
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116 return NGX_ERROR; |
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117 } |
182
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118 |
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119 file->offset += n; |
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120 written += n; |
182
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121 |
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122 if ((size_t) n == size) { |
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123 return written; |
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124 } |
182
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125 |
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126 size -= n; |
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127 } |
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128 #endif |
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129 } |
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130 |
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131 |
561 | 132 ngx_fd_t |
1046 | 133 ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access) |
303
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134 { |
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135 ngx_fd_t fd; |
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136 |
1046 | 137 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, |
138 access ? access : 0600); | |
303
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139 |
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140 if (fd != -1 && !persistent) { |
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141 unlink((const char *) name); |
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142 } |
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143 |
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144 return fd; |
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145 } |
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146 |
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147 |
461 | 148 #define NGX_IOVS 8 |
149 | |
561 | 150 ssize_t |
151 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, | |
152 ngx_pool_t *pool) | |
74
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153 { |
290
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154 u_char *prev; |
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155 size_t size; |
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156 ssize_t n; |
461 | 157 ngx_array_t vec; |
158 struct iovec *iov, iovs[NGX_IOVS]; | |
74
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159 |
461 | 160 /* use pwrite() if there is the only buf in a chain */ |
74
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161 |
170
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162 if (cl->next == NULL) { |
343
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163 return ngx_write_file(file, cl->buf->pos, |
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164 (size_t) (cl->buf->last - cl->buf->pos), |
194
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165 offset); |
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166 } |
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167 |
461 | 168 vec.elts = iovs; |
169 vec.size = sizeof(struct iovec); | |
577 | 170 vec.nalloc = NGX_IOVS; |
461 | 171 vec.pool = pool; |
170
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172 |
461 | 173 do { |
174 prev = NULL; | |
175 iov = NULL; | |
176 size = 0; | |
170
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177 |
461 | 178 vec.nelts = 0; |
179 | |
180 /* create the iovec and coalesce the neighbouring bufs */ | |
170
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181 |
461 | 182 while (cl && vec.nelts < IOV_MAX) { |
183 if (prev == cl->buf->pos) { | |
184 iov->iov_len += cl->buf->last - cl->buf->pos; | |
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185 |
461 | 186 } else { |
501 | 187 iov = ngx_array_push(&vec); |
188 if (iov == NULL) { | |
461 | 189 return NGX_ERROR; |
190 } | |
191 | |
192 iov->iov_base = (void *) cl->buf->pos; | |
193 iov->iov_len = cl->buf->last - cl->buf->pos; | |
194 } | |
195 | |
196 size += cl->buf->last - cl->buf->pos; | |
197 prev = cl->buf->last; | |
198 cl = cl->next; | |
170
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199 } |
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200 |
461 | 201 /* use pwrite() if there is the only iovec buffer */ |
170
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202 |
461 | 203 if (vec.nelts == 1) { |
204 iov = vec.elts; | |
205 return ngx_write_file(file, (u_char *) iov[0].iov_base, | |
206 iov[0].iov_len, offset); | |
207 } | |
170
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208 |
461 | 209 if (file->sys_offset != offset) { |
210 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
211 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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212 "lseek() \"%s\" failed", file->name.data); |
461 | 213 return NGX_ERROR; |
214 } | |
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215 |
461 | 216 file->sys_offset = offset; |
217 } | |
218 | |
219 n = writev(file->fd, vec.elts, vec.nelts); | |
220 | |
221 if (n == -1) { | |
222 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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223 "writev() \"%s\" failed", file->name.data); |
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224 return NGX_ERROR; |
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225 } |
191
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226 |
461 | 227 if ((size_t) n != size) { |
228 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
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229 "writev() \"%s\" has written only %z of %uz", |
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230 file->name.data, n, size); |
461 | 231 return NGX_ERROR; |
232 } | |
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233 |
461 | 234 file->sys_offset += n; |
235 file->offset += n; | |
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236 |
461 | 237 } while (cl); |
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238 |
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239 return n; |
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240 } |
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241 |
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242 |
561 | 243 ngx_int_t |
681 | 244 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s) |
245 { | |
246 struct timeval tv[2]; | |
247 | |
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248 tv[0].tv_sec = ngx_time(); |
681 | 249 tv[0].tv_usec = 0; |
250 tv[1].tv_sec = s; | |
251 tv[1].tv_usec = 0; | |
252 | |
253 if (utimes((char *) name, tv) != -1) { | |
254 return NGX_OK; | |
255 } | |
256 | |
257 return NGX_ERROR; | |
258 } | |
259 | |
260 | |
261 ngx_int_t | |
3651 | 262 ngx_create_file_mapping(ngx_file_mapping_t *fm) |
263 { | |
264 fm->fd = ngx_open_file(fm->name, NGX_FILE_RDWR, NGX_FILE_TRUNCATE, | |
265 NGX_FILE_DEFAULT_ACCESS); | |
266 if (fm->fd == NGX_INVALID_FILE) { | |
267 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
268 ngx_open_file_n " \"%s\" failed", fm->name); | |
269 return NGX_ERROR; | |
270 } | |
271 | |
272 if (ftruncate(fm->fd, fm->size) == -1) { | |
273 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
274 "ftruncate() \"%s\" failed", fm->name); | |
275 goto failed; | |
276 } | |
277 | |
278 fm->addr = mmap(NULL, fm->size, PROT_READ|PROT_WRITE, MAP_SHARED, | |
279 fm->fd, 0); | |
280 if (fm->addr != MAP_FAILED) { | |
281 return NGX_OK; | |
282 } | |
283 | |
284 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
285 "mmap(%uz) \"%s\" failed", fm->size, fm->name); | |
286 | |
287 failed: | |
288 | |
289 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
290 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
291 ngx_close_file_n " \"%s\" failed", fm->name); | |
292 } | |
293 | |
294 return NGX_ERROR; | |
295 } | |
296 | |
297 | |
298 void | |
299 ngx_close_file_mapping(ngx_file_mapping_t *fm) | |
300 { | |
301 if (munmap(fm->addr, fm->size) == -1) { | |
302 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
303 "munmap(%uz) \"%s\" failed", fm->size, fm->name); | |
304 } | |
305 | |
306 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
307 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
308 ngx_close_file_n " \"%s\" failed", fm->name); | |
309 } | |
310 } | |
311 | |
312 | |
313 ngx_int_t | |
561 | 314 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
186
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315 { |
290
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316 dir->dir = opendir((const char *) name->data); |
186
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317 |
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318 if (dir->dir == NULL) { |
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319 return NGX_ERROR; |
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320 } |
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321 |
457 | 322 dir->valid_info = 0; |
186
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323 |
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324 return NGX_OK; |
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325 } |
561 | 326 |
327 | |
727 | 328 ngx_int_t |
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329 ngx_read_dir(ngx_dir_t *dir) |
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330 { |
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331 dir->de = readdir(dir->dir); |
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332 |
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333 if (dir->de) { |
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334 #if (NGX_HAVE_D_TYPE) |
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335 dir->type = dir->de->d_type; |
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336 #else |
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337 dir->type = 0; |
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338 #endif |
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339 return NGX_OK; |
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340 } |
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341 |
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342 return NGX_ERROR; |
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343 } |
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344 |
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345 |
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346 ngx_int_t |
727 | 347 ngx_open_glob(ngx_glob_t *gl) |
348 { | |
1980 | 349 int n; |
350 | |
351 n = glob((char *) gl->pattern, GLOB_NOSORT, NULL, &gl->pglob); | |
352 | |
353 if (n == 0) { | |
354 return NGX_OK; | |
355 } | |
356 | |
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357 #ifdef GLOB_NOMATCH |
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358 |
1980 | 359 if (n == GLOB_NOMATCH && gl->test) { |
727 | 360 return NGX_OK; |
361 } | |
362 | |
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363 #endif |
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364 |
727 | 365 return NGX_ERROR; |
366 } | |
367 | |
368 | |
369 ngx_int_t | |
370 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name) | |
371 { | |
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372 size_t count; |
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373 |
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374 #ifdef GLOB_NOMATCH |
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375 count = (size_t) gl->pglob.gl_pathc; |
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376 #else |
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377 count = (size_t) gl->pglob.gl_matchc; |
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378 #endif |
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379 |
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380 if (gl->n < count) { |
727 | 381 |
382 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]); | |
383 name->data = (u_char *) gl->pglob.gl_pathv[gl->n]; | |
384 gl->n++; | |
385 | |
386 return NGX_OK; | |
387 } | |
388 | |
389 return NGX_DONE; | |
390 } | |
391 | |
392 | |
393 void | |
394 ngx_close_glob(ngx_glob_t *gl) | |
395 { | |
396 globfree(&gl->pglob); | |
397 } | |
398 | |
399 | |
611 | 400 ngx_err_t |
401 ngx_trylock_fd(ngx_fd_t fd) | |
561 | 402 { |
403 struct flock fl; | |
404 | |
611 | 405 fl.l_start = 0; |
406 fl.l_len = 0; | |
407 fl.l_pid = 0; | |
408 fl.l_type = F_WRLCK; | |
561 | 409 fl.l_whence = SEEK_SET; |
611 | 410 |
411 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
412 return ngx_errno; | |
413 } | |
414 | |
415 return 0; | |
416 } | |
417 | |
418 | |
419 ngx_err_t | |
420 ngx_lock_fd(ngx_fd_t fd) | |
421 { | |
422 struct flock fl; | |
423 | |
424 fl.l_start = 0; | |
561 | 425 fl.l_len = 0; |
426 fl.l_pid = 0; | |
427 fl.l_type = F_WRLCK; | |
611 | 428 fl.l_whence = SEEK_SET; |
561 | 429 |
611 | 430 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
431 return ngx_errno; | |
561 | 432 } |
433 | |
611 | 434 return 0; |
561 | 435 } |
436 | |
437 | |
611 | 438 ngx_err_t |
439 ngx_unlock_fd(ngx_fd_t fd) | |
561 | 440 { |
441 struct flock fl; | |
442 | |
611 | 443 fl.l_start = 0; |
561 | 444 fl.l_len = 0; |
445 fl.l_pid = 0; | |
446 fl.l_type = F_UNLCK; | |
611 | 447 fl.l_whence = SEEK_SET; |
561 | 448 |
611 | 449 if (fcntl(fd, F_SETLK, &fl) == -1) { |
450 return ngx_errno; | |
561 | 451 } |
452 | |
611 | 453 return 0; |
561 | 454 } |
2129 | 455 |
456 | |
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457 #if (NGX_HAVE_POSIX_FADVISE) |
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458 |
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459 ngx_int_t |
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460 ngx_read_ahead(ngx_fd_t fd, size_t n) |
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461 { |
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462 int err; |
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463 |
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464 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); |
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465 |
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466 if (err == 0) { |
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467 return 0; |
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468 } |
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469 |
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470 ngx_set_errno(err); |
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471 return NGX_FILE_ERROR; |
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472 } |
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473 |
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474 #endif |
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475 |
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476 |
2129 | 477 #if (NGX_HAVE_O_DIRECT) |
478 | |
479 ngx_int_t | |
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480 ngx_directio_on(ngx_fd_t fd) |
2129 | 481 { |
482 int flags; | |
483 | |
484 flags = fcntl(fd, F_GETFL); | |
485 | |
486 if (flags == -1) { | |
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487 return NGX_FILE_ERROR; |
2129 | 488 } |
489 | |
490 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
491 } | |
492 | |
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493 |
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494 ngx_int_t |
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495 ngx_directio_off(ngx_fd_t fd) |
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496 { |
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497 int flags; |
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498 |
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499 flags = fcntl(fd, F_GETFL); |
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500 |
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501 if (flags == -1) { |
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502 return NGX_FILE_ERROR; |
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503 } |
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504 |
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505 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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506 } |
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507 |
2129 | 508 #endif |
2615 | 509 |
510 | |
511 #if (NGX_HAVE_STATFS) | |
512 | |
513 size_t | |
514 ngx_fs_bsize(u_char *name) | |
515 { | |
516 struct statfs fs; | |
517 | |
518 if (statfs((char *) name, &fs) == -1) { | |
519 return 512; | |
520 } | |
521 | |
522 if ((fs.f_bsize % 512) != 0) { | |
523 return 512; | |
524 } | |
525 | |
526 return (size_t) fs.f_bsize; | |
527 } | |
528 | |
529 #elif (NGX_HAVE_STATVFS) | |
530 | |
531 size_t | |
532 ngx_fs_bsize(u_char *name) | |
533 { | |
534 struct statvfs fs; | |
535 | |
536 if (statvfs((char *) name, &fs) == -1) { | |
537 return 512; | |
538 } | |
539 | |
540 if ((fs.f_frsize % 512) != 0) { | |
541 return 512; | |
542 } | |
543 | |
544 return (size_t) fs.f_frsize; | |
545 } | |
546 | |
547 #else | |
548 | |
549 size_t | |
550 ngx_fs_bsize(u_char *name) | |
551 { | |
552 return 512; | |
553 } | |
554 | |
555 #endif |