Mercurial > hg > nginx
annotate src/os/unix/ngx_files.c @ 4794:4163fb9dcfcb
Explicitly ignore returned value from unlink() in ngx_open_tempfile().
The only thing we could potentially do here in case of error
returned is to complain to error log, but we don't have log
structure available here due to interface limitations.
Prodded by Coverity.
| author | Andrey Belov <defan@nginx.com> |
|---|---|
| date | Mon, 06 Aug 2012 16:06:59 +0000 |
| parents | 9acc1a5a5b9a |
| children | bd6299189b49 2e4e4084b562 |
| rev | line source |
|---|---|
|
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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. |
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 |
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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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30 |
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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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38 |
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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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56 |
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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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66 |
| 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); |
|
182
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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 } |
|
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119 |
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120 file->offset += n; |
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121 written += n; |
|
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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 } |
|
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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) |
|
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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); | |
|
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140 |
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141 if (fd != -1 && !persistent) { |
|
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142 (void) 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) | |
|
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154 { |
|
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155 u_char *prev; |
|
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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]; | |
|
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160 |
| 461 | 161 /* use pwrite() if there is the only buf in a chain */ |
|
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162 |
|
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163 if (cl->next == NULL) { |
|
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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 */ |
|
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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 } |
|
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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); |
|
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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 { |
|
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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 | |
|
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416 ngx_memzero(&fl, sizeof(struct flock)); |
| 611 | 417 fl.l_type = F_WRLCK; |
| 561 | 418 fl.l_whence = SEEK_SET; |
| 611 | 419 |
| 420 if (fcntl(fd, F_SETLK, &fl) == -1) { | |
| 421 return ngx_errno; | |
| 422 } | |
| 423 | |
| 424 return 0; | |
| 425 } | |
| 426 | |
| 427 | |
| 428 ngx_err_t | |
| 429 ngx_lock_fd(ngx_fd_t fd) | |
| 430 { | |
| 431 struct flock fl; | |
| 432 | |
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433 ngx_memzero(&fl, sizeof(struct flock)); |
| 561 | 434 fl.l_type = F_WRLCK; |
| 611 | 435 fl.l_whence = SEEK_SET; |
| 561 | 436 |
| 611 | 437 if (fcntl(fd, F_SETLKW, &fl) == -1) { |
| 438 return ngx_errno; | |
| 561 | 439 } |
| 440 | |
| 611 | 441 return 0; |
| 561 | 442 } |
| 443 | |
| 444 | |
| 611 | 445 ngx_err_t |
| 446 ngx_unlock_fd(ngx_fd_t fd) | |
| 561 | 447 { |
| 448 struct flock fl; | |
| 449 | |
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450 ngx_memzero(&fl, sizeof(struct flock)); |
| 561 | 451 fl.l_type = F_UNLCK; |
| 611 | 452 fl.l_whence = SEEK_SET; |
| 561 | 453 |
| 611 | 454 if (fcntl(fd, F_SETLK, &fl) == -1) { |
| 455 return ngx_errno; | |
| 561 | 456 } |
| 457 | |
| 611 | 458 return 0; |
| 561 | 459 } |
| 2129 | 460 |
| 461 | |
|
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462 #if (NGX_HAVE_POSIX_FADVISE) && !(NGX_HAVE_F_READAHEAD) |
|
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463 |
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464 ngx_int_t |
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465 ngx_read_ahead(ngx_fd_t fd, size_t n) |
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466 { |
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467 int err; |
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468 |
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469 err = posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); |
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470 |
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471 if (err == 0) { |
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472 return 0; |
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473 } |
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474 |
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475 ngx_set_errno(err); |
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476 return NGX_FILE_ERROR; |
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477 } |
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478 |
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479 #endif |
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480 |
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481 |
| 2129 | 482 #if (NGX_HAVE_O_DIRECT) |
| 483 | |
| 484 ngx_int_t | |
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485 ngx_directio_on(ngx_fd_t fd) |
| 2129 | 486 { |
| 487 int flags; | |
| 488 | |
| 489 flags = fcntl(fd, F_GETFL); | |
| 490 | |
| 491 if (flags == -1) { | |
|
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492 return NGX_FILE_ERROR; |
| 2129 | 493 } |
| 494 | |
| 495 return fcntl(fd, F_SETFL, flags | O_DIRECT); | |
| 496 } | |
| 497 | |
|
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498 |
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499 ngx_int_t |
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500 ngx_directio_off(ngx_fd_t fd) |
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501 { |
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502 int flags; |
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503 |
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504 flags = fcntl(fd, F_GETFL); |
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505 |
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506 if (flags == -1) { |
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507 return NGX_FILE_ERROR; |
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508 } |
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509 |
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510 return fcntl(fd, F_SETFL, flags & ~O_DIRECT); |
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511 } |
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512 |
| 2129 | 513 #endif |
| 2615 | 514 |
| 515 | |
| 516 #if (NGX_HAVE_STATFS) | |
| 517 | |
| 518 size_t | |
| 519 ngx_fs_bsize(u_char *name) | |
| 520 { | |
| 521 struct statfs fs; | |
| 522 | |
| 523 if (statfs((char *) name, &fs) == -1) { | |
| 524 return 512; | |
| 525 } | |
| 526 | |
| 527 if ((fs.f_bsize % 512) != 0) { | |
| 528 return 512; | |
| 529 } | |
| 530 | |
| 531 return (size_t) fs.f_bsize; | |
| 532 } | |
| 533 | |
| 534 #elif (NGX_HAVE_STATVFS) | |
| 535 | |
| 536 size_t | |
| 537 ngx_fs_bsize(u_char *name) | |
| 538 { | |
| 539 struct statvfs fs; | |
| 540 | |
| 541 if (statvfs((char *) name, &fs) == -1) { | |
| 542 return 512; | |
| 543 } | |
| 544 | |
| 545 if ((fs.f_frsize % 512) != 0) { | |
| 546 return 512; | |
| 547 } | |
| 548 | |
| 549 return (size_t) fs.f_frsize; | |
| 550 } | |
| 551 | |
| 552 #else | |
| 553 | |
| 554 size_t | |
| 555 ngx_fs_bsize(u_char *name) | |
| 556 { | |
| 557 return 512; | |
| 558 } | |
| 559 | |
| 560 #endif |