Mercurial > hg > nginx
annotate src/os/unix/ngx_files.c @ 611:3f8a2132b93d release-0.3.27
nginx-0.3.27-RELEASE import
*) Change: the "variables_hash_max_size" and
"variables_hash_bucket_size" directives.
*) Feature: the $body_bytes_sent variable can be used not only in the
"log_format" directive.
*) Feature: the $ssl_protocol and $ssl_cipher variables.
*) Feature: the cache line size detection for widespread CPUs at start
time.
*) Feature: now the "accept_mutex" directive is supported using
fcntl(2) on platforms different from i386, amd64, sparc64, and ppc.
*) Feature: the "lock_file" directive and the --with-lock-path=PATH
autoconfiguration directive.
*) Bugfix: if the HTTPS protocol was used in the "proxy_pass" directive
then the requests with the body was not transferred.
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 08 Feb 2006 15:33:12 +0000 |
| parents | 4d9ea73a627a |
| children | f971949ffb58 |
| 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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5 |
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5
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6 |
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33
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 |
| 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() failed, file \"%s\"", 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, "lseek() failed"); |
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34 return NGX_ERROR; |
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35 } |
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36 |
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37 file->sys_offset = offset; |
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38 } |
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39 |
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40 n = read(file->fd, buf, size); |
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41 |
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42 if (n == -1) { |
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43 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "read() failed"); |
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44 return NGX_ERROR; |
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45 } |
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46 |
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47 file->sys_offset += n; |
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48 |
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49 #endif |
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50 |
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51 file->offset += n; |
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52 |
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53 return n; |
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54 } |
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55 |
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56 |
| 561 | 57 ssize_t |
| 58 ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) | |
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59 { |
| 561 | 60 ssize_t n; |
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61 |
| 461 | 62 ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, |
| 63 "write: %d, %p, %uz, %O", file->fd, buf, size, offset); | |
| 64 | |
| 469 | 65 #if (NGX_HAVE_PWRITE) |
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66 |
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67 n = pwrite(file->fd, buf, size, offset); |
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68 |
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69 if (n == -1) { |
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70 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "pwrite() failed"); |
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71 return NGX_ERROR; |
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72 } |
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73 |
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74 if ((size_t) n != size) { |
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75 ngx_log_error(NGX_LOG_CRIT, file->log, 0, |
| 461 | 76 "pwrite() has written only %z of %uz", n, size); |
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77 return NGX_ERROR; |
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78 } |
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79 |
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80 #else |
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81 |
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82 if (file->sys_offset != offset) { |
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83 if (lseek(file->fd, offset, SEEK_SET) == -1) { |
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84 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "lseek() failed"); |
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85 return NGX_ERROR; |
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86 } |
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87 |
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88 file->sys_offset = offset; |
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89 } |
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90 |
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91 n = write(file->fd, buf, size); |
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92 |
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93 if (n == -1) { |
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94 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, "write() failed"); |
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95 return NGX_ERROR; |
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96 } |
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97 |
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98 if ((size_t) n != size) { |
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99 ngx_log_error(NGX_LOG_CRIT, file->log, 0, |
| 461 | 100 "write() has written only %z of %uz", n, size); |
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101 return NGX_ERROR; |
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102 } |
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103 |
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104 file->sys_offset += n; |
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105 |
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106 #endif |
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107 |
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108 file->offset += n; |
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109 |
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110 return n; |
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111 } |
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112 |
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113 |
| 561 | 114 ngx_fd_t |
| 115 ngx_open_tempfile(u_char *name, ngx_uint_t persistent) | |
|
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116 { |
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117 ngx_fd_t fd; |
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118 |
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119 fd = open((const char *) name, O_CREAT|O_EXCL|O_RDWR, 0600); |
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120 |
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121 if (fd != -1 && !persistent) { |
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122 unlink((const char *) name); |
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123 } |
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124 |
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125 return fd; |
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126 } |
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127 |
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128 |
| 461 | 129 #define NGX_IOVS 8 |
| 130 | |
| 561 | 131 ssize_t |
| 132 ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, off_t offset, | |
| 133 ngx_pool_t *pool) | |
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134 { |
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135 u_char *prev; |
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136 size_t size; |
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137 ssize_t n; |
| 461 | 138 ngx_array_t vec; |
| 139 struct iovec *iov, iovs[NGX_IOVS]; | |
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140 |
| 461 | 141 /* use pwrite() if there is the only buf in a chain */ |
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142 |
|
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143 if (cl->next == NULL) { |
|
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144 return ngx_write_file(file, cl->buf->pos, |
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145 (size_t) (cl->buf->last - cl->buf->pos), |
|
194
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146 offset); |
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147 } |
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148 |
| 461 | 149 vec.elts = iovs; |
| 150 vec.size = sizeof(struct iovec); | |
| 577 | 151 vec.nalloc = NGX_IOVS; |
| 461 | 152 vec.pool = pool; |
|
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153 |
| 461 | 154 do { |
| 155 prev = NULL; | |
| 156 iov = NULL; | |
| 157 size = 0; | |
|
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158 |
| 461 | 159 vec.nelts = 0; |
| 160 | |
| 161 /* create the iovec and coalesce the neighbouring bufs */ | |
|
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162 |
| 461 | 163 while (cl && vec.nelts < IOV_MAX) { |
| 164 if (prev == cl->buf->pos) { | |
| 165 iov->iov_len += cl->buf->last - cl->buf->pos; | |
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166 |
| 461 | 167 } else { |
| 501 | 168 iov = ngx_array_push(&vec); |
| 169 if (iov == NULL) { | |
| 461 | 170 return NGX_ERROR; |
| 171 } | |
| 172 | |
| 173 iov->iov_base = (void *) cl->buf->pos; | |
| 174 iov->iov_len = cl->buf->last - cl->buf->pos; | |
| 175 } | |
| 176 | |
| 177 size += cl->buf->last - cl->buf->pos; | |
| 178 prev = cl->buf->last; | |
| 179 cl = cl->next; | |
|
170
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180 } |
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181 |
| 461 | 182 /* use pwrite() if there is the only iovec buffer */ |
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183 |
| 461 | 184 if (vec.nelts == 1) { |
| 185 iov = vec.elts; | |
| 186 return ngx_write_file(file, (u_char *) iov[0].iov_base, | |
| 187 iov[0].iov_len, offset); | |
| 188 } | |
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189 |
| 461 | 190 if (file->sys_offset != offset) { |
| 191 if (lseek(file->fd, offset, SEEK_SET) == -1) { | |
| 192 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
| 193 "lseek() failed"); | |
| 194 return NGX_ERROR; | |
| 195 } | |
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196 |
| 461 | 197 file->sys_offset = offset; |
| 198 } | |
| 199 | |
| 200 n = writev(file->fd, vec.elts, vec.nelts); | |
| 201 | |
| 202 if (n == -1) { | |
| 203 ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, | |
| 204 "writev() failed"); | |
|
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205 return NGX_ERROR; |
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206 } |
|
191
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207 |
| 461 | 208 if ((size_t) n != size) { |
| 209 ngx_log_error(NGX_LOG_CRIT, file->log, 0, | |
| 210 "writev() has written only %z of %uz", n, size); | |
| 211 return NGX_ERROR; | |
| 212 } | |
|
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213 |
| 461 | 214 file->sys_offset += n; |
| 215 file->offset += n; | |
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216 |
| 461 | 217 } while (cl); |
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218 |
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219 return n; |
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220 } |
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221 |
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222 |
| 561 | 223 ngx_int_t |
| 224 ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) | |
|
186
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225 { |
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226 dir->dir = opendir((const char *) name->data); |
|
186
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227 |
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228 if (dir->dir == NULL) { |
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229 return NGX_ERROR; |
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230 } |
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231 |
| 457 | 232 dir->valid_info = 0; |
|
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233 |
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234 return NGX_OK; |
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235 } |
| 561 | 236 |
| 237 | |
| 611 | 238 ngx_err_t |
| 239 ngx_trylock_fd(ngx_fd_t fd) | |
| 561 | 240 { |
| 241 struct flock fl; | |
| 242 | |
| 611 | 243 fl.l_start = 0; |
| 244 fl.l_len = 0; | |
| 245 fl.l_pid = 0; | |
| 246 fl.l_type = F_WRLCK; | |
| 561 | 247 fl.l_whence = SEEK_SET; |
| 611 | 248 |
| 249 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
| 250 return ngx_errno; | |
| 251 } | |
| 252 | |
| 253 return 0; | |
| 254 } | |
| 255 | |
| 256 | |
| 257 ngx_err_t | |
| 258 ngx_lock_fd(ngx_fd_t fd) | |
| 259 { | |
| 260 struct flock fl; | |
| 261 | |
| 262 fl.l_start = 0; | |
| 561 | 263 fl.l_len = 0; |
| 264 fl.l_pid = 0; | |
| 265 fl.l_type = F_WRLCK; | |
| 611 | 266 fl.l_whence = SEEK_SET; |
| 561 | 267 |
| 611 | 268 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
| 269 return ngx_errno; | |
| 561 | 270 } |
| 271 | |
| 611 | 272 return 0; |
| 561 | 273 } |
| 274 | |
| 275 | |
| 611 | 276 ngx_err_t |
| 277 ngx_unlock_fd(ngx_fd_t fd) | |
| 561 | 278 { |
| 279 struct flock fl; | |
| 280 | |
| 611 | 281 fl.l_start = 0; |
| 561 | 282 fl.l_len = 0; |
| 283 fl.l_pid = 0; | |
| 284 fl.l_type = F_UNLCK; | |
| 611 | 285 fl.l_whence = SEEK_SET; |
| 561 | 286 |
| 611 | 287 if (fcntl(fd, F_SETLK, &fl) == -1) { |
| 288 return ngx_errno; | |
| 561 | 289 } |
| 290 | |
| 611 | 291 return 0; |
| 561 | 292 } |