Mercurial > hg > nginx
annotate src/os/unix/ngx_files.c @ 3163:34cbd6e86218
handle short pwrite() to log an error cause: ENOSPC, EDQUOT, or EFBIG
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 25 Sep 2009 13:55:46 +0000 |
parents | a2c1b4f74ea7 |
children | b1b1775698d5 |
rev | line source |
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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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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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561 | 11 ssize_t |
12 ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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13 { |
561 | 14 ssize_t n; |
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16 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
461 | 17 "read: %d, %p, %uz, %O", file->fd, buf, size, offset); |
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469 | 19 #if (NGX_HAVE_PREAD) |
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20 |
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21 n = pread(file->fd, buf, size, offset); |
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23 if (n == -1) { |
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24 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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25 "pread() \"%s\" failed", file->name.data); |
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26 return NGX_ERROR; |
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27 } |
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29 #else |
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31 if (file->sys_offset != offset) { |
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32 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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33 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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34 "lseek() \"%s\" failed", file->name.data); |
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35 return NGX_ERROR; |
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36 } |
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37 |
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38 file->sys_offset = offset; |
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39 } |
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40 |
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41 n = read(file->fd, buf, size); |
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42 |
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43 if (n == -1) { |
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44 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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45 "read() \"%s\" failed", file->name.data); |
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46 return NGX_ERROR; |
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47 } |
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48 |
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49 file->sys_offset += n; |
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50 |
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51 #endif |
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52 |
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53 file->offset += n; |
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54 |
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55 return n; |
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56 } |
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57 |
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561 | 59 ssize_t |
60 ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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61 { |
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62 ssize_t n, written; |
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63 |
461 | 64 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
65 "write: %d, %p, %uz, %O", file->fd, buf, size, offset); | |
66 | |
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67 written = 0; |
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68 |
469 | 69 #if (NGX_HAVE_PWRITE) |
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70 |
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71 for ( ;; ) { |
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72 n = pwrite(file->fd, buf, size, offset); |
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73 |
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74 if (n == -1) { |
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75 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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76 "pwrite() \"%s\" failed", file->name.data); |
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77 return NGX_ERROR; |
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78 } |
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79 |
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80 file->offset += n; |
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81 written += n; |
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82 |
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83 if ((size_t) n == size) { |
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84 return written; |
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85 } |
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86 |
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87 offset += n; |
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88 size -= n; |
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89 } |
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90 |
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91 #else |
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92 |
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93 if (file->sys_offset != offset) { |
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94 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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95 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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96 "lseek() \"%s\" failed", file->name.data); |
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97 return NGX_ERROR; |
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98 } |
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99 |
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100 file->sys_offset = offset; |
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101 } |
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102 |
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103 for ( ;; ) { |
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104 n = write(file->fd, buf, size); |
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105 |
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106 if (n == -1) { |
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107 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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108 "write() \"%s\" failed", file->name.data); |
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109 return NGX_ERROR; |
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110 } |
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111 |
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112 file->offset += n; |
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113 written += n; |
182
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115 if ((size_t) n == size) { |
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116 return written; |
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117 } |
182
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119 size -= n; |
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120 } |
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121 #endif |
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122 } |
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123 |
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124 |
561 | 125 ngx_fd_t |
1046 | 126 ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access) |
303
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127 { |
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128 ngx_fd_t fd; |
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129 |
1046 | 130 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, |
131 access ? access : 0600); | |
303
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132 |
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133 if (fd != -1 && !persistent) { |
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134 unlink((const char *) name); |
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135 } |
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136 |
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137 return fd; |
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138 } |
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139 |
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140 |
461 | 141 #define NGX_IOVS 8 |
142 | |
561 | 143 ssize_t |
144 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, | |
145 ngx_pool_t *pool) | |
74
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146 { |
290
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147 u_char *prev; |
74
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148 size_t size; |
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149 ssize_t n; |
461 | 150 ngx_array_t vec; |
151 struct iovec *iov, iovs[NGX_IOVS]; | |
74
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152 |
461 | 153 /* use pwrite() if there is the only buf in a chain */ |
74
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154 |
170
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155 if (cl->next == NULL) { |
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156 return ngx_write_file(file, cl->buf->pos, |
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157 (size_t) (cl->buf->last - cl->buf->pos), |
194
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158 offset); |
74
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159 } |
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160 |
461 | 161 vec.elts = iovs; |
162 vec.size = sizeof(struct iovec); | |
577 | 163 vec.nalloc = NGX_IOVS; |
461 | 164 vec.pool = pool; |
170
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165 |
461 | 166 do { |
167 prev = NULL; | |
168 iov = NULL; | |
169 size = 0; | |
170
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170 |
461 | 171 vec.nelts = 0; |
172 | |
173 /* create the iovec and coalesce the neighbouring bufs */ | |
170
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174 |
461 | 175 while (cl && vec.nelts < IOV_MAX) { |
176 if (prev == cl->buf->pos) { | |
177 iov->iov_len += cl->buf->last - cl->buf->pos; | |
74
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178 |
461 | 179 } else { |
501 | 180 iov = ngx_array_push(&vec); |
181 if (iov == NULL) { | |
461 | 182 return NGX_ERROR; |
183 } | |
184 | |
185 iov->iov_base = (void *) cl->buf->pos; | |
186 iov->iov_len = cl->buf->last - cl->buf->pos; | |
187 } | |
188 | |
189 size += cl->buf->last - cl->buf->pos; | |
190 prev = cl->buf->last; | |
191 cl = cl->next; | |
170
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192 } |
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193 |
461 | 194 /* use pwrite() if there is the only iovec buffer */ |
170
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195 |
461 | 196 if (vec.nelts == 1) { |
197 iov = vec.elts; | |
198 return ngx_write_file(file, (u_char *) iov[0].iov_base, | |
199 iov[0].iov_len, offset); | |
200 } | |
170
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201 |
461 | 202 if (file->sys_offset != offset) { |
203 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
204 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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205 "lseek() \"%s\" failed", file->name.data); |
461 | 206 return NGX_ERROR; |
207 } | |
74
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208 |
461 | 209 file->sys_offset = offset; |
210 } | |
211 | |
212 n = writev(file->fd, vec.elts, vec.nelts); | |
213 | |
214 if (n == -1) { | |
215 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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216 "writev() \"%s\" failed", file->name.data); |
154
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217 return NGX_ERROR; |
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218 } |
191
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219 |
461 | 220 if ((size_t) n != size) { |
221 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
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222 "writev() \"%s\" has written only %z of %uz", |
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223 file->name.data, n, size); |
461 | 224 return NGX_ERROR; |
225 } | |
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226 |
461 | 227 file->sys_offset += n; |
228 file->offset += n; | |
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229 |
461 | 230 } while (cl); |
73
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231 |
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232 return n; |
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233 } |
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234 |
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235 |
561 | 236 ngx_int_t |
681 | 237 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s) |
238 { | |
239 struct timeval tv[2]; | |
240 | |
241 tv[0].tv_sec = s; | |
242 tv[0].tv_usec = 0; | |
243 tv[1].tv_sec = s; | |
244 tv[1].tv_usec = 0; | |
245 | |
246 if (utimes((char *) name, tv) != -1) { | |
247 return NGX_OK; | |
248 } | |
249 | |
250 return NGX_ERROR; | |
251 } | |
252 | |
253 | |
254 ngx_int_t | |
561 | 255 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
186
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256 { |
290
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257 dir->dir = opendir((const char *) name->data); |
186
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258 |
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259 if (dir->dir == NULL) { |
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260 return NGX_ERROR; |
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261 } |
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262 |
457 | 263 dir->valid_info = 0; |
186
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264 |
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265 return NGX_OK; |
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266 } |
561 | 267 |
268 | |
727 | 269 ngx_int_t |
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270 ngx_read_dir(ngx_dir_t *dir) |
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271 { |
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272 dir->de = readdir(dir->dir); |
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273 |
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274 if (dir->de) { |
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275 #if (NGX_HAVE_D_TYPE) |
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276 dir->type = dir->de->d_type; |
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277 dir->valid_type = dir->type ? 1 : 0; |
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278 #else |
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279 dir->valid_type = 0; |
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280 #endif |
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281 return NGX_OK; |
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282 } |
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283 |
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284 return NGX_ERROR; |
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285 } |
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286 |
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287 |
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288 ngx_int_t |
727 | 289 ngx_open_glob(ngx_glob_t *gl) |
290 { | |
1980 | 291 int n; |
292 | |
293 n = glob((char *) gl->pattern, GLOB_NOSORT, NULL, &gl->pglob); | |
294 | |
295 if (n == 0) { | |
296 return NGX_OK; | |
297 } | |
298 | |
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299 #ifdef GLOB_NOMATCH |
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300 |
1980 | 301 if (n == GLOB_NOMATCH && gl->test) { |
727 | 302 return NGX_OK; |
303 } | |
304 | |
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305 #endif |
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306 |
727 | 307 return NGX_ERROR; |
308 } | |
309 | |
310 | |
311 ngx_int_t | |
312 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name) | |
313 { | |
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314 size_t count; |
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315 |
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316 #ifdef GLOB_NOMATCH |
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317 count = (size_t) gl->pglob.gl_pathc; |
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318 #else |
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319 count = (size_t) gl->pglob.gl_matchc; |
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320 #endif |
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321 |
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322 if (gl->n < count) { |
727 | 323 |
324 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]); | |
325 name->data = (u_char *) gl->pglob.gl_pathv[gl->n]; | |
326 gl->n++; | |
327 | |
328 return NGX_OK; | |
329 } | |
330 | |
331 return NGX_DONE; | |
332 } | |
333 | |
334 | |
335 void | |
336 ngx_close_glob(ngx_glob_t *gl) | |
337 { | |
338 globfree(&gl->pglob); | |
339 } | |
340 | |
341 | |
611 | 342 ngx_err_t |
343 ngx_trylock_fd(ngx_fd_t fd) | |
561 | 344 { |
345 struct flock fl; | |
346 | |
611 | 347 fl.l_start = 0; |
348 fl.l_len = 0; | |
349 fl.l_pid = 0; | |
350 fl.l_type = F_WRLCK; | |
561 | 351 fl.l_whence = SEEK_SET; |
611 | 352 |
353 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
354 return ngx_errno; | |
355 } | |
356 | |
357 return 0; | |
358 } | |
359 | |
360 | |
361 ngx_err_t | |
362 ngx_lock_fd(ngx_fd_t fd) | |
363 { | |
364 struct flock fl; | |
365 | |
366 fl.l_start = 0; | |
561 | 367 fl.l_len = 0; |
368 fl.l_pid = 0; | |
369 fl.l_type = F_WRLCK; | |
611 | 370 fl.l_whence = SEEK_SET; |
561 | 371 |
611 | 372 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
373 return ngx_errno; | |
561 | 374 } |
375 | |
611 | 376 return 0; |
561 | 377 } |
378 | |
379 | |
611 | 380 ngx_err_t |
381 ngx_unlock_fd(ngx_fd_t fd) | |
561 | 382 { |
383 struct flock fl; | |
384 | |
611 | 385 fl.l_start = 0; |
561 | 386 fl.l_len = 0; |
387 fl.l_pid = 0; | |
388 fl.l_type = F_UNLCK; | |
611 | 389 fl.l_whence = SEEK_SET; |
561 | 390 |
611 | 391 if (fcntl(fd, F_SETLK, &fl) == -1) { |
392 return ngx_errno; | |
561 | 393 } |
394 | |
611 | 395 return 0; |
561 | 396 } |
2129 | 397 |
398 | |
399 #if (NGX_HAVE_O_DIRECT) | |
400 | |
401 ngx_int_t | |
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402 ngx_directio_on(ngx_fd_t fd) |
2129 | 403 { |
404 int flags; | |
405 | |
406 flags = fcntl(fd, F_GETFL); | |
407 | |
408 if (flags == -1) { | |
409 return -1; | |
410 } | |
411 | |
412 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
413 } | |
414 | |
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415 |
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416 ngx_int_t |
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417 ngx_directio_off(ngx_fd_t fd) |
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418 { |
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419 int flags; |
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420 |
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421 flags = fcntl(fd, F_GETFL); |
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422 |
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423 if (flags == -1) { |
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424 return -1; |
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425 } |
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426 |
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427 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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428 } |
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429 |
2129 | 430 #endif |
2615 | 431 |
432 | |
433 #if (NGX_HAVE_STATFS) | |
434 | |
435 size_t | |
436 ngx_fs_bsize(u_char *name) | |
437 { | |
438 struct statfs fs; | |
439 | |
440 if (statfs((char *) name, &fs) == -1) { | |
441 return 512; | |
442 } | |
443 | |
444 if ((fs.f_bsize % 512) != 0) { | |
445 return 512; | |
446 } | |
447 | |
448 return (size_t) fs.f_bsize; | |
449 } | |
450 | |
451 #elif (NGX_HAVE_STATVFS) | |
452 | |
453 size_t | |
454 ngx_fs_bsize(u_char *name) | |
455 { | |
456 struct statvfs fs; | |
457 | |
458 if (statvfs((char *) name, &fs) == -1) { | |
459 return 512; | |
460 } | |
461 | |
462 if ((fs.f_frsize % 512) != 0) { | |
463 return 512; | |
464 } | |
465 | |
466 return (size_t) fs.f_frsize; | |
467 } | |
468 | |
469 #else | |
470 | |
471 size_t | |
472 ngx_fs_bsize(u_char *name) | |
473 { | |
474 return 512; | |
475 } | |
476 | |
477 #endif |