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## 6. Limitations

## 6.1 Disk I/O

The existing library for the Atmos doesn't implement C file I/O. There is one hack for the `write()` routine in place, which will make functions work that write to `stdout` (like `printf()`). However, this function has some shortcomings which won't be fixed, because it's going to be replaced anyway.

To be more concrete, this limitation means that you cannot use any of the following functions (and a few others):

- fclose
- fopen
- fread
- fprintf
- fputc
- fscanf
- fwrite
- ...

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