tempFile returns the fd for the temporary file, reusing an open fd or creating the file as necessary.
()
| 129 | // tempFile returns the fd for the temporary file, reusing an open fd |
| 130 | // or creating the file as necessary. |
| 131 | func (s *sharedPullerState) tempFile() (*lockedWriterAt, error) { |
| 132 | s.mut.Lock() |
| 133 | defer s.mut.Unlock() |
| 134 | |
| 135 | // If we've already hit an error, return early |
| 136 | if s.err != nil { |
| 137 | return nil, s.err |
| 138 | } |
| 139 | |
| 140 | // If the temp file is already open, return the file descriptor |
| 141 | if s.writer != nil { |
| 142 | return s.writer, nil |
| 143 | } |
| 144 | |
| 145 | if err := s.addWriterLocked(); err != nil { |
| 146 | s.failLocked(err) |
| 147 | return nil, err |
| 148 | } |
| 149 | |
| 150 | return s.writer, nil |
| 151 | } |
| 152 | |
| 153 | func (s *sharedPullerState) addWriterLocked() error { |
| 154 | return inWritableDir(s.tempFileInWritableDir, s.fs, s.tempName, s.ignorePerms) |