Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_files.c @ 4500:9dfe02dd0f11
Added msleep() on reload to allow new processes to start.
This is expected to ensure smoother operation on reload (and with less
chance of listen queue overflows).
Prodded by Igor Sysoev.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 28 Feb 2012 11:40:18 +0000 |
parents | d620f497c50f |
children | 9acc1a5a5b9a |
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 |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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11 |
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12 #if (NGX_HAVE_FILE_AIO) |
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13 |
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14 ngx_uint_t ngx_file_aio = 1; |
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15 |
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16 #endif |
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17 |
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18 |
561 | 19 ssize_t |
20 ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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21 { |
561 | 22 ssize_t n; |
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23 |
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24 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
461 | 25 "read: %d, %p, %uz, %O", file->fd, buf, size, offset); |
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469 | 27 #if (NGX_HAVE_PREAD) |
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28 |
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29 n = pread(file->fd, buf, size, offset); |
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31 if (n == -1) { |
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32 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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33 "pread() \"%s\" failed", file->name.data); |
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34 return NGX_ERROR; |
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35 } |
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36 |
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37 #else |
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39 if (file->sys_offset != offset) { |
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40 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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41 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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42 "lseek() \"%s\" failed", file->name.data); |
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43 return NGX_ERROR; |
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44 } |
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45 |
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46 file->sys_offset = offset; |
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47 } |
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48 |
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49 n = read(file->fd, buf, size); |
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50 |
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51 if (n == -1) { |
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52 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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53 "read() \"%s\" failed", file->name.data); |
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54 return NGX_ERROR; |
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55 } |
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57 file->sys_offset += n; |
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58 |
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59 #endif |
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60 |
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61 file->offset += n; |
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62 |
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63 return n; |
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64 } |
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65 |
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561 | 67 ssize_t |
68 ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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69 { |
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70 ssize_t n, written; |
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71 |
461 | 72 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
73 "write: %d, %p, %uz, %O", file->fd, buf, size, offset); | |
74 | |
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75 written = 0; |
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76 |
469 | 77 #if (NGX_HAVE_PWRITE) |
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78 |
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79 for ( ;; ) { |
3657 | 80 n = pwrite(file->fd, buf + written, size, offset); |
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81 |
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82 if (n == -1) { |
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83 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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84 "pwrite() \"%s\" failed", file->name.data); |
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85 return NGX_ERROR; |
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86 } |
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87 |
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88 file->offset += n; |
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89 written += n; |
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90 |
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91 if ((size_t) n == size) { |
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92 return written; |
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93 } |
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94 |
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95 offset += n; |
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96 size -= n; |
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97 } |
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98 |
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99 #else |
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100 |
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101 if (file->sys_offset != offset) { |
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102 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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103 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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104 "lseek() \"%s\" failed", file->name.data); |
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105 return NGX_ERROR; |
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106 } |
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107 |
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108 file->sys_offset = offset; |
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109 } |
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110 |
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111 for ( ;; ) { |
3657 | 112 n = write(file->fd, buf + written, size); |
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113 |
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114 if (n == -1) { |
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115 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, |
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116 "write() \"%s\" failed", file->name.data); |
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117 return NGX_ERROR; |
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118 } |
182
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119 |
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120 file->offset += n; |
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121 written += n; |
182
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122 |
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123 if ((size_t) n == size) { |
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124 return written; |
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125 } |
182
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126 |
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127 size -= n; |
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128 } |
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129 #endif |
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130 } |
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131 |
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132 |
561 | 133 ngx_fd_t |
1046 | 134 ngx_open_tempfile(u_char *name, ngx_uint_t persistent, ngx_uint_t access) |
303
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135 { |
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136 ngx_fd_t fd; |
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137 |
1046 | 138 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, |
139 access ? access : 0600); | |
303
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140 |
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141 if (fd != -1 && !persistent) { |
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142 unlink((const char *) name); |
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143 } |
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144 |
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145 return fd; |
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146 } |
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147 |
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148 |
461 | 149 #define NGX_IOVS 8 |
150 | |
561 | 151 ssize_t |
152 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, | |
153 ngx_pool_t *pool) | |
74
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154 { |
290
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155 u_char *prev; |
74
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156 size_t size; |
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157 ssize_t total, n; |
461 | 158 ngx_array_t vec; |
159 struct iovec *iov, iovs[NGX_IOVS]; | |
74
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160 |
461 | 161 /* use pwrite() if there is the only buf in a chain */ |
74
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162 |
170
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163 if (cl->next == NULL) { |
343
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164 return ngx_write_file(file, cl->buf->pos, |
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165 (size_t) (cl->buf->last - cl->buf->pos), |
194
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166 offset); |
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167 } |
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168 |
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169 total = 0; |
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170 |
461 | 171 vec.elts = iovs; |
172 vec.size = sizeof(struct iovec); | |
577 | 173 vec.nalloc = NGX_IOVS; |
461 | 174 vec.pool = pool; |
170
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175 |
461 | 176 do { |
177 prev = NULL; | |
178 iov = NULL; | |
179 size = 0; | |
170
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180 |
461 | 181 vec.nelts = 0; |
182 | |
183 /* create the iovec and coalesce the neighbouring bufs */ | |
170
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184 |
461 | 185 while (cl && vec.nelts < IOV_MAX) { |
186 if (prev == cl->buf->pos) { | |
187 iov->iov_len += cl->buf->last - cl->buf->pos; | |
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188 |
461 | 189 } else { |
501 | 190 iov = ngx_array_push(&vec); |
191 if (iov == NULL) { | |
461 | 192 return NGX_ERROR; |
193 } | |
194 | |
195 iov->iov_base = (void *) cl->buf->pos; | |
196 iov->iov_len = cl->buf->last - cl->buf->pos; | |
197 } | |
198 | |
199 size += cl->buf->last - cl->buf->pos; | |
200 prev = cl->buf->last; | |
201 cl = cl->next; | |
170
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202 } |
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203 |
461 | 204 /* use pwrite() if there is the only iovec buffer */ |
170
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205 |
461 | 206 if (vec.nelts == 1) { |
207 iov = vec.elts; | |
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208 |
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209 n = ngx_write_file(file, (u_char *) iov[0].iov_base, |
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210 iov[0].iov_len, offset); |
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211 |
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212 if (n == NGX_ERROR) { |
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213 return n; |
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214 } |
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215 |
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216 return total + n; |
461 | 217 } |
170
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218 |
461 | 219 if (file->sys_offset != offset) { |
220 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
221 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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222 "lseek() \"%s\" failed", file->name.data); |
461 | 223 return NGX_ERROR; |
224 } | |
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225 |
461 | 226 file->sys_offset = offset; |
227 } | |
228 | |
229 n = writev(file->fd, vec.elts, vec.nelts); | |
230 | |
231 if (n == -1) { | |
232 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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233 "writev() \"%s\" failed", file->name.data); |
154
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234 return NGX_ERROR; |
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235 } |
191
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236 |
461 | 237 if ((size_t) n != size) { |
238 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
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239 "writev() \"%s\" has written only %z of %uz", |
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240 file->name.data, n, size); |
461 | 241 return NGX_ERROR; |
242 } | |
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243 |
461 | 244 file->sys_offset += n; |
245 file->offset += n; | |
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246 total += n; |
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247 |
461 | 248 } while (cl); |
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249 |
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250 return total; |
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251 } |
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252 |
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253 |
561 | 254 ngx_int_t |
681 | 255 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s) |
256 { | |
257 struct timeval tv[2]; | |
258 | |
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259 tv[0].tv_sec = ngx_time(); |
681 | 260 tv[0].tv_usec = 0; |
261 tv[1].tv_sec = s; | |
262 tv[1].tv_usec = 0; | |
263 | |
264 if (utimes((char *) name, tv) != -1) { | |
265 return NGX_OK; | |
266 } | |
267 | |
268 return NGX_ERROR; | |
269 } | |
270 | |
271 | |
272 ngx_int_t | |
3651 | 273 ngx_create_file_mapping(ngx_file_mapping_t *fm) |
274 { | |
275 fm->fd = ngx_open_file(fm->name, NGX_FILE_RDWR, NGX_FILE_TRUNCATE, | |
276 NGX_FILE_DEFAULT_ACCESS); | |
277 if (fm->fd == NGX_INVALID_FILE) { | |
278 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
279 ngx_open_file_n " \"%s\" failed", fm->name); | |
280 return NGX_ERROR; | |
281 } | |
282 | |
283 if (ftruncate(fm->fd, fm->size) == -1) { | |
284 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
285 "ftruncate() \"%s\" failed", fm->name); | |
286 goto failed; | |
287 } | |
288 | |
289 fm->addr = mmap(NULL, fm->size, PROT_READ|PROT_WRITE, MAP_SHARED, | |
290 fm->fd, 0); | |
291 if (fm->addr != MAP_FAILED) { | |
292 return NGX_OK; | |
293 } | |
294 | |
295 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
296 "mmap(%uz) \"%s\" failed", fm->size, fm->name); | |
297 | |
298 failed: | |
299 | |
300 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
301 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
302 ngx_close_file_n " \"%s\" failed", fm->name); | |
303 } | |
304 | |
305 return NGX_ERROR; | |
306 } | |
307 | |
308 | |
309 void | |
310 ngx_close_file_mapping(ngx_file_mapping_t *fm) | |
311 { | |
312 if (munmap(fm->addr, fm->size) == -1) { | |
313 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
314 "munmap(%uz) \"%s\" failed", fm->size, fm->name); | |
315 } | |
316 | |
317 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
318 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
319 ngx_close_file_n " \"%s\" failed", fm->name); | |
320 } | |
321 } | |
322 | |
323 | |
324 ngx_int_t | |
561 | 325 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
186
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326 { |
290
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327 dir->dir = opendir((const char *) name->data); |
186
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328 |
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329 if (dir->dir == NULL) { |
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330 return NGX_ERROR; |
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331 } |
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332 |
457 | 333 dir->valid_info = 0; |
186
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334 |
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335 return NGX_OK; |
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336 } |
561 | 337 |
338 | |
727 | 339 ngx_int_t |
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340 ngx_read_dir(ngx_dir_t *dir) |
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341 { |
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342 dir->de = readdir(dir->dir); |
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343 |
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344 if (dir->de) { |
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345 #if (NGX_HAVE_D_TYPE) |
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346 dir->type = dir->de->d_type; |
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347 #else |
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348 dir->type = 0; |
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349 #endif |
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350 return NGX_OK; |
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351 } |
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352 |
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353 return NGX_ERROR; |
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354 } |
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355 |
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356 |
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357 ngx_int_t |
727 | 358 ngx_open_glob(ngx_glob_t *gl) |
359 { | |
1980 | 360 int n; |
361 | |
362 n = glob((char *) gl->pattern, GLOB_NOSORT, NULL, &gl->pglob); | |
363 | |
364 if (n == 0) { | |
365 return NGX_OK; | |
366 } | |
367 | |
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368 #ifdef GLOB_NOMATCH |
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369 |
1980 | 370 if (n == GLOB_NOMATCH && gl->test) { |
727 | 371 return NGX_OK; |
372 } | |
373 | |
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374 #endif |
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375 |
727 | 376 return NGX_ERROR; |
377 } | |
378 | |
379 | |
380 ngx_int_t | |
381 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name) | |
382 { | |
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383 size_t count; |
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384 |
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385 #ifdef GLOB_NOMATCH |
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386 count = (size_t) gl->pglob.gl_pathc; |
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387 #else |
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388 count = (size_t) gl->pglob.gl_matchc; |
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389 #endif |
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390 |
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391 if (gl->n < count) { |
727 | 392 |
393 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]); | |
394 name->data = (u_char *) gl->pglob.gl_pathv[gl->n]; | |
395 gl->n++; | |
396 | |
397 return NGX_OK; | |
398 } | |
399 | |
400 return NGX_DONE; | |
401 } | |
402 | |
403 | |
404 void | |
405 ngx_close_glob(ngx_glob_t *gl) | |
406 { | |
407 globfree(&gl->pglob); | |
408 } | |
409 | |
410 | |
611 | 411 ngx_err_t |
412 ngx_trylock_fd(ngx_fd_t fd) | |
561 | 413 { |
414 struct flock fl; | |
415 | |
611 | 416 fl.l_start = 0; |
417 fl.l_len = 0; | |
418 fl.l_pid = 0; | |
419 fl.l_type = F_WRLCK; | |
561 | 420 fl.l_whence = SEEK_SET; |
611 | 421 |
422 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
423 return ngx_errno; | |
424 } | |
425 | |
426 return 0; | |
427 } | |
428 | |
429 | |
430 ngx_err_t | |
431 ngx_lock_fd(ngx_fd_t fd) | |
432 { | |
433 struct flock fl; | |
434 | |
435 fl.l_start = 0; | |
561 | 436 fl.l_len = 0; |
437 fl.l_pid = 0; | |
438 fl.l_type = F_WRLCK; | |
611 | 439 fl.l_whence = SEEK_SET; |
561 | 440 |
611 | 441 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
442 return ngx_errno; | |
561 | 443 } |
444 | |
611 | 445 return 0; |
561 | 446 } |
447 | |
448 | |
611 | 449 ngx_err_t |
450 ngx_unlock_fd(ngx_fd_t fd) | |
561 | 451 { |
452 struct flock fl; | |
453 | |
611 | 454 fl.l_start = 0; |
561 | 455 fl.l_len = 0; |
456 fl.l_pid = 0; | |
457 fl.l_type = F_UNLCK; | |
611 | 458 fl.l_whence = SEEK_SET; |
561 | 459 |
611 | 460 if (fcntl(fd, F_SETLK, &fl) == -1) { |
461 return ngx_errno; | |
561 | 462 } |
463 | |
611 | 464 return 0; |
561 | 465 } |
2129 | 466 |
467 | |
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468 #if (NGX_HAVE_POSIX_FADVISE) && !(NGX_HAVE_F_READAHEAD) |
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469 |
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470 ngx_int_t |
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471 ngx_read_ahead(ngx_fd_t fd, size_t n) |
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472 { |
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473 int err; |
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474 |
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475 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); |
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476 |
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477 if (err == 0) { |
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478 return 0; |
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479 } |
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480 |
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481 ngx_set_errno(err); |
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482 return NGX_FILE_ERROR; |
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483 } |
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484 |
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485 #endif |
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486 |
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487 |
2129 | 488 #if (NGX_HAVE_O_DIRECT) |
489 | |
490 ngx_int_t | |
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491 ngx_directio_on(ngx_fd_t fd) |
2129 | 492 { |
493 int flags; | |
494 | |
495 flags = fcntl(fd, F_GETFL); | |
496 | |
497 if (flags == -1) { | |
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498 return NGX_FILE_ERROR; |
2129 | 499 } |
500 | |
501 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
502 } | |
503 | |
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504 |
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505 ngx_int_t |
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506 ngx_directio_off(ngx_fd_t fd) |
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507 { |
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508 int flags; |
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509 |
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510 flags = fcntl(fd, F_GETFL); |
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511 |
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512 if (flags == -1) { |
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513 return NGX_FILE_ERROR; |
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514 } |
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515 |
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516 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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517 } |
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518 |
2129 | 519 #endif |
2615 | 520 |
521 | |
522 #if (NGX_HAVE_STATFS) | |
523 | |
524 size_t | |
525 ngx_fs_bsize(u_char *name) | |
526 { | |
527 struct statfs fs; | |
528 | |
529 if (statfs((char *) name, &fs) == -1) { | |
530 return 512; | |
531 } | |
532 | |
533 if ((fs.f_bsize % 512) != 0) { | |
534 return 512; | |
535 } | |
536 | |
537 return (size_t) fs.f_bsize; | |
538 } | |
539 | |
540 #elif (NGX_HAVE_STATVFS) | |
541 | |
542 size_t | |
543 ngx_fs_bsize(u_char *name) | |
544 { | |
545 struct statvfs fs; | |
546 | |
547 if (statvfs((char *) name, &fs) == -1) { | |
548 return 512; | |
549 } | |
550 | |
551 if ((fs.f_frsize % 512) != 0) { | |
552 return 512; | |
553 } | |
554 | |
555 return (size_t) fs.f_frsize; | |
556 } | |
557 | |
558 #else | |
559 | |
560 size_t | |
561 ngx_fs_bsize(u_char *name) | |
562 { | |
563 return 512; | |
564 } | |
565 | |
566 #endif |