FITS file read/write permissions.
| Enumerator |
|---|
| Read | Open an existing file with read-only permission.
|
| Edit | Open an existing file with write permission.
|
| Create | Create a new file (overwrite forbidden)
|
| Write | Open a file if it exists, create a new one otherwise.
|
| Overwrite | Create a new file or overwrite existing file.
|
| Temporary | Create a temporary file (removed by destructor, overwrite forbidden)
|