| 149 | } |
| 150 | |
| 151 | func (f *File) reload() { |
| 152 | info, err := os.Stat(f.file) |
| 153 | if err != nil { |
| 154 | if os.IsNotExist(err) { |
| 155 | f.mLck.Lock() |
| 156 | f.m = map[string][]string{} |
| 157 | f.mLck.Unlock() |
| 158 | return |
| 159 | } |
| 160 | f.log.Error("os stat", err) |
| 161 | } |
| 162 | if info.ModTime().Before(f.mStamp) || time.Since(info.ModTime()) < (reloadInterval/2) { |
| 163 | return // reload not necessary |
| 164 | } |
| 165 | |
| 166 | f.log.Debugf("reloading") |
| 167 | |
| 168 | newm := make(map[string][]string, len(f.m)+5) |
| 169 | if err := readFile(f.file, newm); err != nil { |
| 170 | if os.IsNotExist(err) { |
| 171 | f.log.Printf("ignoring non-existent file: %s", f.file) |
| 172 | return |
| 173 | } |
| 174 | |
| 175 | f.log.Println(err) |
| 176 | return |
| 177 | } |
| 178 | // after reading we need to check whether file has changed in between |
| 179 | info2, err := os.Stat(f.file) |
| 180 | if err != nil { |
| 181 | f.log.Println(err) |
| 182 | return |
| 183 | } |
| 184 | |
| 185 | if !info2.ModTime().Equal(info.ModTime()) { |
| 186 | // file has changed in the meantime |
| 187 | return |
| 188 | } |
| 189 | |
| 190 | f.mLck.Lock() |
| 191 | f.m = newm |
| 192 | f.mStamp = info.ModTime() |
| 193 | f.mLck.Unlock() |
| 194 | } |
| 195 | |
| 196 | func readFile(path string, out map[string][]string) error { |
| 197 | f, err := os.Open(path) |