Mercurial > hg > nginx
annotate src/os/unix/ngx_files.c @ 4220:4be8dd8dd547
Fixed unix ngx_write_chain_to_file() to return total bytes written.
Previously result of last iteration's writev() was returned. This was
unnoticed as return value was only used if chain contained only one or
two buffers.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 20 Oct 2011 12:40:26 +0000 |
| parents | cf80c0b0109a |
| children | 3203ddb78279 |
| rev | line source |
|---|---|
|
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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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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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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17 |
| 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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| 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); |
|
182
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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 } |
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118 |
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119 file->offset += n; |
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120 written += n; |
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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 } |
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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) |
|
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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); | |
|
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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) | |
|
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153 { |
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154 u_char *prev; |
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155 size_t size; |
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156 ssize_t total, n; |
| 461 | 157 ngx_array_t vec; |
| 158 struct iovec *iov, iovs[NGX_IOVS]; | |
|
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159 |
| 461 | 160 /* use pwrite() if there is the only buf in a chain */ |
|
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161 |
|
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162 if (cl->next == NULL) { |
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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 |
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168 total = 0; |
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169 |
| 461 | 170 vec.elts = iovs; |
| 171 vec.size = sizeof(struct iovec); | |
| 577 | 172 vec.nalloc = NGX_IOVS; |
| 461 | 173 vec.pool = pool; |
|
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174 |
| 461 | 175 do { |
| 176 prev = NULL; | |
| 177 iov = NULL; | |
| 178 size = 0; | |
|
170
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179 |
| 461 | 180 vec.nelts = 0; |
| 181 | |
| 182 /* create the iovec and coalesce the neighbouring bufs */ | |
|
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183 |
| 461 | 184 while (cl && vec.nelts < IOV_MAX) { |
| 185 if (prev == cl->buf->pos) { | |
| 186 iov->iov_len += cl->buf->last - cl->buf->pos; | |
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187 |
| 461 | 188 } else { |
| 501 | 189 iov = ngx_array_push(&vec); |
| 190 if (iov == NULL) { | |
| 461 | 191 return NGX_ERROR; |
| 192 } | |
| 193 | |
| 194 iov->iov_base = (void *) cl->buf->pos; | |
| 195 iov->iov_len = cl->buf->last - cl->buf->pos; | |
| 196 } | |
| 197 | |
| 198 size += cl->buf->last - cl->buf->pos; | |
| 199 prev = cl->buf->last; | |
| 200 cl = cl->next; | |
|
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201 } |
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202 |
| 461 | 203 /* use pwrite() if there is the only iovec buffer */ |
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204 |
| 461 | 205 if (vec.nelts == 1) { |
| 206 iov = vec.elts; | |
| 207 return ngx_write_file(file, (u_char *) iov[0].iov_base, | |
| 208 iov[0].iov_len, offset); | |
| 209 } | |
|
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210 |
| 461 | 211 if (file->sys_offset != offset) { |
| 212 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
| 213 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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214 "lseek() \"%s\" failed", file->name.data); |
| 461 | 215 return NGX_ERROR; |
| 216 } | |
|
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217 |
| 461 | 218 file->sys_offset = offset; |
| 219 } | |
| 220 | |
| 221 n = writev(file->fd, vec.elts, vec.nelts); | |
| 222 | |
| 223 if (n == -1) { | |
| 224 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
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225 "writev() \"%s\" failed", file->name.data); |
|
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226 return NGX_ERROR; |
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227 } |
|
191
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228 |
| 461 | 229 if ((size_t) n != size) { |
| 230 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
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231 "writev() \"%s\" has written only %z of %uz", |
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232 file->name.data, n, size); |
| 461 | 233 return NGX_ERROR; |
| 234 } | |
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235 |
| 461 | 236 file->sys_offset += n; |
| 237 file->offset += n; | |
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238 total += n; |
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239 |
| 461 | 240 } while (cl); |
|
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241 |
|
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242 return total; |
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243 } |
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244 |
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245 |
| 561 | 246 ngx_int_t |
| 681 | 247 ngx_set_file_time(u_char *name, ngx_fd_t fd, time_t s) |
| 248 { | |
| 249 struct timeval tv[2]; | |
| 250 | |
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251 tv[0].tv_sec = ngx_time(); |
| 681 | 252 tv[0].tv_usec = 0; |
| 253 tv[1].tv_sec = s; | |
| 254 tv[1].tv_usec = 0; | |
| 255 | |
| 256 if (utimes((char *) name, tv) != -1) { | |
| 257 return NGX_OK; | |
| 258 } | |
| 259 | |
| 260 return NGX_ERROR; | |
| 261 } | |
| 262 | |
| 263 | |
| 264 ngx_int_t | |
| 3651 | 265 ngx_create_file_mapping(ngx_file_mapping_t *fm) |
| 266 { | |
| 267 fm->fd = ngx_open_file(fm->name, NGX_FILE_RDWR, NGX_FILE_TRUNCATE, | |
| 268 NGX_FILE_DEFAULT_ACCESS); | |
| 269 if (fm->fd == NGX_INVALID_FILE) { | |
| 270 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
| 271 ngx_open_file_n " \"%s\" failed", fm->name); | |
| 272 return NGX_ERROR; | |
| 273 } | |
| 274 | |
| 275 if (ftruncate(fm->fd, fm->size) == -1) { | |
| 276 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
| 277 "ftruncate() \"%s\" failed", fm->name); | |
| 278 goto failed; | |
| 279 } | |
| 280 | |
| 281 fm->addr = mmap(NULL, fm->size, PROT_READ|PROT_WRITE, MAP_SHARED, | |
| 282 fm->fd, 0); | |
| 283 if (fm->addr != MAP_FAILED) { | |
| 284 return NGX_OK; | |
| 285 } | |
| 286 | |
| 287 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
| 288 "mmap(%uz) \"%s\" failed", fm->size, fm->name); | |
| 289 | |
| 290 failed: | |
| 291 | |
| 292 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
| 293 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
| 294 ngx_close_file_n " \"%s\" failed", fm->name); | |
| 295 } | |
| 296 | |
| 297 return NGX_ERROR; | |
| 298 } | |
| 299 | |
| 300 | |
| 301 void | |
| 302 ngx_close_file_mapping(ngx_file_mapping_t *fm) | |
| 303 { | |
| 304 if (munmap(fm->addr, fm->size) == -1) { | |
| 305 ngx_log_error(NGX_LOG_CRIT, fm->log, ngx_errno, | |
| 306 "munmap(%uz) \"%s\" failed", fm->size, fm->name); | |
| 307 } | |
| 308 | |
| 309 if (ngx_close_file(fm->fd) == NGX_FILE_ERROR) { | |
| 310 ngx_log_error(NGX_LOG_ALERT, fm->log, ngx_errno, | |
| 311 ngx_close_file_n " \"%s\" failed", fm->name); | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 | |
| 316 ngx_int_t | |
| 561 | 317 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
|
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318 { |
|
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319 dir->dir = opendir((const char *) name->data); |
|
186
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320 |
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321 if (dir->dir == NULL) { |
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322 return NGX_ERROR; |
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323 } |
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324 |
| 457 | 325 dir->valid_info = 0; |
|
186
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326 |
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327 return NGX_OK; |
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328 } |
| 561 | 329 |
| 330 | |
| 727 | 331 ngx_int_t |
|
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332 ngx_read_dir(ngx_dir_t *dir) |
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333 { |
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334 dir->de = readdir(dir->dir); |
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335 |
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336 if (dir->de) { |
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337 #if (NGX_HAVE_D_TYPE) |
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338 dir->type = dir->de->d_type; |
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339 #else |
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340 dir->type = 0; |
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341 #endif |
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342 return NGX_OK; |
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343 } |
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344 |
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345 return NGX_ERROR; |
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346 } |
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347 |
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348 |
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349 ngx_int_t |
| 727 | 350 ngx_open_glob(ngx_glob_t *gl) |
| 351 { | |
| 1980 | 352 int n; |
| 353 | |
| 354 n = glob((char *) gl->pattern, GLOB_NOSORT, NULL, &gl->pglob); | |
| 355 | |
| 356 if (n == 0) { | |
| 357 return NGX_OK; | |
| 358 } | |
| 359 | |
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360 #ifdef GLOB_NOMATCH |
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361 |
| 1980 | 362 if (n == GLOB_NOMATCH && gl->test) { |
| 727 | 363 return NGX_OK; |
| 364 } | |
| 365 | |
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366 #endif |
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367 |
| 727 | 368 return NGX_ERROR; |
| 369 } | |
| 370 | |
| 371 | |
| 372 ngx_int_t | |
| 373 ngx_read_glob(ngx_glob_t *gl, ngx_str_t *name) | |
| 374 { | |
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375 size_t count; |
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376 |
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377 #ifdef GLOB_NOMATCH |
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378 count = (size_t) gl->pglob.gl_pathc; |
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379 #else |
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380 count = (size_t) gl->pglob.gl_matchc; |
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381 #endif |
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382 |
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383 if (gl->n < count) { |
| 727 | 384 |
| 385 name->len = (size_t) ngx_strlen(gl->pglob.gl_pathv[gl->n]); | |
| 386 name->data = (u_char *) gl->pglob.gl_pathv[gl->n]; | |
| 387 gl->n++; | |
| 388 | |
| 389 return NGX_OK; | |
| 390 } | |
| 391 | |
| 392 return NGX_DONE; | |
| 393 } | |
| 394 | |
| 395 | |
| 396 void | |
| 397 ngx_close_glob(ngx_glob_t *gl) | |
| 398 { | |
| 399 globfree(&gl->pglob); | |
| 400 } | |
| 401 | |
| 402 | |
| 611 | 403 ngx_err_t |
| 404 ngx_trylock_fd(ngx_fd_t fd) | |
| 561 | 405 { |
| 406 struct flock fl; | |
| 407 | |
| 611 | 408 fl.l_start = 0; |
| 409 fl.l_len = 0; | |
| 410 fl.l_pid = 0; | |
| 411 fl.l_type = F_WRLCK; | |
| 561 | 412 fl.l_whence = SEEK_SET; |
| 611 | 413 |
| 414 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
| 415 return ngx_errno; | |
| 416 } | |
| 417 | |
| 418 return 0; | |
| 419 } | |
| 420 | |
| 421 | |
| 422 ngx_err_t | |
| 423 ngx_lock_fd(ngx_fd_t fd) | |
| 424 { | |
| 425 struct flock fl; | |
| 426 | |
| 427 fl.l_start = 0; | |
| 561 | 428 fl.l_len = 0; |
| 429 fl.l_pid = 0; | |
| 430 fl.l_type = F_WRLCK; | |
| 611 | 431 fl.l_whence = SEEK_SET; |
| 561 | 432 |
| 611 | 433 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
| 434 return ngx_errno; | |
| 561 | 435 } |
| 436 | |
| 611 | 437 return 0; |
| 561 | 438 } |
| 439 | |
| 440 | |
| 611 | 441 ngx_err_t |
| 442 ngx_unlock_fd(ngx_fd_t fd) | |
| 561 | 443 { |
| 444 struct flock fl; | |
| 445 | |
| 611 | 446 fl.l_start = 0; |
| 561 | 447 fl.l_len = 0; |
| 448 fl.l_pid = 0; | |
| 449 fl.l_type = F_UNLCK; | |
| 611 | 450 fl.l_whence = SEEK_SET; |
| 561 | 451 |
| 611 | 452 if (fcntl(fd, F_SETLK, &fl) == -1) { |
| 453 return ngx_errno; | |
| 561 | 454 } |
| 455 | |
| 611 | 456 return 0; |
| 561 | 457 } |
| 2129 | 458 |
| 459 | |
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460 #if (NGX_HAVE_POSIX_FADVISE) |
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461 |
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462 ngx_int_t |
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463 ngx_read_ahead(ngx_fd_t fd, size_t n) |
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464 { |
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465 int err; |
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466 |
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467 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); |
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468 |
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469 if (err == 0) { |
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470 return 0; |
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471 } |
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472 |
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473 ngx_set_errno(err); |
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474 return NGX_FILE_ERROR; |
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475 } |
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476 |
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477 #endif |
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478 |
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479 |
| 2129 | 480 #if (NGX_HAVE_O_DIRECT) |
| 481 | |
| 482 ngx_int_t | |
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483 ngx_directio_on(ngx_fd_t fd) |
| 2129 | 484 { |
| 485 int flags; | |
| 486 | |
| 487 flags = fcntl(fd, F_GETFL); | |
| 488 | |
| 489 if (flags == -1) { | |
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490 return NGX_FILE_ERROR; |
| 2129 | 491 } |
| 492 | |
| 493 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
| 494 } | |
| 495 | |
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496 |
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497 ngx_int_t |
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498 ngx_directio_off(ngx_fd_t fd) |
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499 { |
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500 int flags; |
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501 |
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502 flags = fcntl(fd, F_GETFL); |
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503 |
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504 if (flags == -1) { |
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505 return NGX_FILE_ERROR; |
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506 } |
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507 |
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508 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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509 } |
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510 |
| 2129 | 511 #endif |
| 2615 | 512 |
| 513 | |
| 514 #if (NGX_HAVE_STATFS) | |
| 515 | |
| 516 size_t | |
| 517 ngx_fs_bsize(u_char *name) | |
| 518 { | |
| 519 struct statfs fs; | |
| 520 | |
| 521 if (statfs((char *) name, &fs) == -1) { | |
| 522 return 512; | |
| 523 } | |
| 524 | |
| 525 if ((fs.f_bsize % 512) != 0) { | |
| 526 return 512; | |
| 527 } | |
| 528 | |
| 529 return (size_t) fs.f_bsize; | |
| 530 } | |
| 531 | |
| 532 #elif (NGX_HAVE_STATVFS) | |
| 533 | |
| 534 size_t | |
| 535 ngx_fs_bsize(u_char *name) | |
| 536 { | |
| 537 struct statvfs fs; | |
| 538 | |
| 539 if (statvfs((char *) name, &fs) == -1) { | |
| 540 return 512; | |
| 541 } | |
| 542 | |
| 543 if ((fs.f_frsize % 512) != 0) { | |
| 544 return 512; | |
| 545 } | |
| 546 | |
| 547 return (size_t) fs.f_frsize; | |
| 548 } | |
| 549 | |
| 550 #else | |
| 551 | |
| 552 size_t | |
| 553 ngx_fs_bsize(u_char *name) | |
| 554 { | |
| 555 return 512; | |
| 556 } | |
| 557 | |
| 558 #endif |