Mercurial > hg > nginx
annotate src/os/unix/ngx_files.c @ 3157:a2c1b4f74ea7
log file name for read/write errors
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 24 Sep 2009 20:04:10 +0000 |
parents | ceef364208c8 |
children | 34cbd6e86218 |
rev | line source |
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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5 |
5
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6 |
33
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7 #include <ngx_config.h> |
8
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8 #include <ngx_core.h> |
74
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9 |
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10 |
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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15 |
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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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18 |
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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22 |
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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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28 |
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29 #else |
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30 |
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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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58 |
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 { |
561 | 62 ssize_t n; |
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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 | |
469 | 67 #if (NGX_HAVE_PWRITE) |
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68 |
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69 n = pwrite(file->fd, buf, size, offset); |
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70 |
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71 if (n == -1) { |
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72 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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73 "pwrite() \"%s\" failed", file->name.data); |
74
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74 return NGX_ERROR; |
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75 } |
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76 |
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77 if ((size_t) n != size) { |
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78 ngx_log_error(NGX_LOG_CRIT, file->log, 0, |
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79 "pwrite() \"%s\" has written only %z of %uz", |
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80 file->name.data, n, size); |
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81 return NGX_ERROR; |
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82 } |
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83 |
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84 #else |
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85 |
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86 if (file->sys_offset != offset) { |
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87 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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88 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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89 "lseek() \"%s\" failed", file->name.data); |
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90 return NGX_ERROR; |
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91 } |
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92 |
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93 file->sys_offset = offset; |
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94 } |
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95 |
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96 n = write(file->fd, buf, size); |
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97 |
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98 if (n == -1) { |
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99 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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100 "write() \"%s\" failed", file->name.data); |
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101 return NGX_ERROR; |
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102 } |
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103 |
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104 if ((size_t) n != size) { |
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105 ngx_log_error(NGX_LOG_CRIT, file->log, 0, |
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106 "write() \"%s\" has written only %z of %uz", |
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107 file->name.data, n, size); |
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108 return NGX_ERROR; |
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109 } |
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110 |
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111 file->sys_offset += n; |
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112 |
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113 #endif |
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114 |
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115 file->offset += n; |
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116 |
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117 return n; |
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118 } |
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119 |
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120 |
561 | 121 ngx_fd_t |
1046 | 122 ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access) |
303
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123 { |
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124 ngx_fd_t fd; |
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125 |
1046 | 126 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, |
127 access ? access : 0600); | |
303
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128 |
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129 if (fd != -1 && !persistent) { |
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130 unlink((const char *) name); |
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131 } |
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132 |
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133 return fd; |
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134 } |
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135 |
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136 |
461 | 137 #define NGX_IOVS 8 |
138 | |
561 | 139 ssize_t |
140 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, | |
141 ngx_pool_t *pool) | |
74
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142 { |
290
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143 u_char *prev; |
74
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144 size_t size; |
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145 ssize_t n; |
461 | 146 ngx_array_t vec; |
147 struct iovec *iov, iovs[NGX_IOVS]; | |
74
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148 |
461 | 149 /* use pwrite() if there is the only buf in a chain */ |
74
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150 |
170
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151 if (cl->next == NULL) { |
343
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152 return ngx_write_file(file, cl->buf->pos, |
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153 (size_t) (cl->buf->last - cl->buf->pos), |
194
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154 offset); |
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155 } |
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156 |
461 | 157 vec.elts = iovs; |
158 vec.size = sizeof(struct iovec); | |
577 | 159 vec.nalloc = NGX_IOVS; |
461 | 160 vec.pool = pool; |
170
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161 |
461 | 162 do { |
163 prev = NULL; | |
164 iov = NULL; | |
165 size = 0; | |
170
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166 |
461 | 167 vec.nelts = 0; |
168 | |
169 /* create the iovec and coalesce the neighbouring bufs */ | |
170
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170 |
461 | 171 while (cl && vec.nelts < IOV_MAX) { |
172 if (prev == cl->buf->pos) { | |
173 iov->iov_len += cl->buf->last - cl->buf->pos; | |
74
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174 |
461 | 175 } else { |
501 | 176 iov = ngx_array_push(&vec); |
177 if (iov == NULL) { | |
461 | 178 return NGX_ERROR; |
179 } | |
180 | |
181 iov->iov_base = (void *) cl->buf->pos; | |
182 iov->iov_len = cl->buf->last - cl->buf->pos; | |
183 } | |
184 | |
185 size += cl->buf->last - cl->buf->pos; | |
186 prev = cl->buf->last; | |
187 cl = cl->next; | |
170
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188 } |
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189 |
461 | 190 /* use pwrite() if there is the only iovec buffer */ |
170
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191 |
461 | 192 if (vec.nelts == 1) { |
193 iov = vec.elts; | |
194 return ngx_write_file(file, (u_char *) iov[0].iov_base, | |
195 iov[0].iov_len, offset); | |
196 } | |
170
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197 |
461 | 198 if (file->sys_offset != offset) { |
199 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
200 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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201 "lseek() \"%s\" failed", file->name.data); |
461 | 202 return NGX_ERROR; |
203 } | |
74
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204 |
461 | 205 file->sys_offset = offset; |
206 } | |
207 | |
208 n = writev(file->fd, vec.elts, vec.nelts); | |
209 | |
210 if (n == -1) { | |
211 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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212 "writev() \"%s\" failed", file->name.data); |
154
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213 return NGX_ERROR; |
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214 } |
191
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215 |
461 | 216 if ((size_t) n != size) { |
217 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
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218 "writev() \"%s\" has written only %z of %uz", |
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219 file->name.data, n, size); |
461 | 220 return NGX_ERROR; |
221 } | |
74
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222 |
461 | 223 file->sys_offset += n; |
224 file->offset += n; | |
74
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225 |
461 | 226 } while (cl); |
73
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227 |
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228 return n; |
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229 } |
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230 |
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231 |
561 | 232 ngx_int_t |
681 | 233 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s) |
234 { | |
235 struct timeval tv[2]; | |
236 | |
237 tv[0].tv_sec = s; | |
238 tv[0].tv_usec = 0; | |
239 tv[1].tv_sec = s; | |
240 tv[1].tv_usec = 0; | |
241 | |
242 if (utimes((char *) name, tv) != -1) { | |
243 return NGX_OK; | |
244 } | |
245 | |
246 return NGX_ERROR; | |
247 } | |
248 | |
249 | |
250 ngx_int_t | |
561 | 251 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
186
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252 { |
290
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253 dir->dir = opendir((const char *) name->data); |
186
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254 |
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255 if (dir->dir == NULL) { |
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256 return NGX_ERROR; |
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257 } |
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258 |
457 | 259 dir->valid_info = 0; |
186
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260 |
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261 return NGX_OK; |
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262 } |
561 | 263 |
264 | |
727 | 265 ngx_int_t |
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266 ngx_read_dir(ngx_dir_t *dir) |
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267 { |
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268 dir->de = readdir(dir->dir); |
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269 |
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270 if (dir->de) { |
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271 #if (NGX_HAVE_D_TYPE) |
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272 dir->type = dir->de->d_type; |
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273 dir->valid_type = dir->type ? 1 : 0; |
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274 #else |
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275 dir->valid_type = 0; |
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276 #endif |
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277 return NGX_OK; |
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278 } |
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279 |
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280 return NGX_ERROR; |
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281 } |
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282 |
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283 |
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284 ngx_int_t |
727 | 285 ngx_open_glob(ngx_glob_t *gl) |
286 { | |
1980 | 287 int n; |
288 | |
289 n = glob((char *) gl->pattern, GLOB_NOSORT, NULL, &gl->pglob); | |
290 | |
291 if (n == 0) { | |
292 return NGX_OK; | |
293 } | |
294 | |
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295 #ifdef GLOB_NOMATCH |
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296 |
1980 | 297 if (n == GLOB_NOMATCH && gl->test) { |
727 | 298 return NGX_OK; |
299 } | |
300 | |
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301 #endif |
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302 |
727 | 303 return NGX_ERROR; |
304 } | |
305 | |
306 | |
307 ngx_int_t | |
308 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name) | |
309 { | |
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310 size_t count; |
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311 |
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312 #ifdef GLOB_NOMATCH |
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313 count = (size_t) gl->pglob.gl_pathc; |
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314 #else |
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315 count = (size_t) gl->pglob.gl_matchc; |
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316 #endif |
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317 |
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318 if (gl->n < count) { |
727 | 319 |
320 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]); | |
321 name->data = (u_char *) gl->pglob.gl_pathv[gl->n]; | |
322 gl->n++; | |
323 | |
324 return NGX_OK; | |
325 } | |
326 | |
327 return NGX_DONE; | |
328 } | |
329 | |
330 | |
331 void | |
332 ngx_close_glob(ngx_glob_t *gl) | |
333 { | |
334 globfree(&gl->pglob); | |
335 } | |
336 | |
337 | |
611 | 338 ngx_err_t |
339 ngx_trylock_fd(ngx_fd_t fd) | |
561 | 340 { |
341 struct flock fl; | |
342 | |
611 | 343 fl.l_start = 0; |
344 fl.l_len = 0; | |
345 fl.l_pid = 0; | |
346 fl.l_type = F_WRLCK; | |
561 | 347 fl.l_whence = SEEK_SET; |
611 | 348 |
349 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
350 return ngx_errno; | |
351 } | |
352 | |
353 return 0; | |
354 } | |
355 | |
356 | |
357 ngx_err_t | |
358 ngx_lock_fd(ngx_fd_t fd) | |
359 { | |
360 struct flock fl; | |
361 | |
362 fl.l_start = 0; | |
561 | 363 fl.l_len = 0; |
364 fl.l_pid = 0; | |
365 fl.l_type = F_WRLCK; | |
611 | 366 fl.l_whence = SEEK_SET; |
561 | 367 |
611 | 368 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
369 return ngx_errno; | |
561 | 370 } |
371 | |
611 | 372 return 0; |
561 | 373 } |
374 | |
375 | |
611 | 376 ngx_err_t |
377 ngx_unlock_fd(ngx_fd_t fd) | |
561 | 378 { |
379 struct flock fl; | |
380 | |
611 | 381 fl.l_start = 0; |
561 | 382 fl.l_len = 0; |
383 fl.l_pid = 0; | |
384 fl.l_type = F_UNLCK; | |
611 | 385 fl.l_whence = SEEK_SET; |
561 | 386 |
611 | 387 if (fcntl(fd, F_SETLK, &fl) == -1) { |
388 return ngx_errno; | |
561 | 389 } |
390 | |
611 | 391 return 0; |
561 | 392 } |
2129 | 393 |
394 | |
395 #if (NGX_HAVE_O_DIRECT) | |
396 | |
397 ngx_int_t | |
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398 ngx_directio_on(ngx_fd_t fd) |
2129 | 399 { |
400 int flags; | |
401 | |
402 flags = fcntl(fd, F_GETFL); | |
403 | |
404 if (flags == -1) { | |
405 return -1; | |
406 } | |
407 | |
408 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
409 } | |
410 | |
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411 |
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412 ngx_int_t |
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413 ngx_directio_off(ngx_fd_t fd) |
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414 { |
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415 int flags; |
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416 |
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417 flags = fcntl(fd, F_GETFL); |
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418 |
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419 if (flags == -1) { |
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420 return -1; |
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421 } |
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422 |
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423 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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424 } |
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425 |
2129 | 426 #endif |
2615 | 427 |
428 | |
429 #if (NGX_HAVE_STATFS) | |
430 | |
431 size_t | |
432 ngx_fs_bsize(u_char *name) | |
433 { | |
434 struct statfs fs; | |
435 | |
436 if (statfs((char *) name, &fs) == -1) { | |
437 return 512; | |
438 } | |
439 | |
440 if ((fs.f_bsize % 512) != 0) { | |
441 return 512; | |
442 } | |
443 | |
444 return (size_t) fs.f_bsize; | |
445 } | |
446 | |
447 #elif (NGX_HAVE_STATVFS) | |
448 | |
449 size_t | |
450 ngx_fs_bsize(u_char *name) | |
451 { | |
452 struct statvfs fs; | |
453 | |
454 if (statvfs((char *) name, &fs) == -1) { | |
455 return 512; | |
456 } | |
457 | |
458 if ((fs.f_frsize % 512) != 0) { | |
459 return 512; | |
460 } | |
461 | |
462 return (size_t) fs.f_frsize; | |
463 } | |
464 | |
465 #else | |
466 | |
467 size_t | |
468 ngx_fs_bsize(u_char *name) | |
469 { | |
470 return 512; | |
471 } | |
472 | |
473 #endif |