Brendan Coles e8e8d3caf5 LibC: __generate_unique_filename(): Replace rand() with arc4random() ...

LibC stdlib `arc4random()` uses the `getrandom` system call which
uses `KernelRng::get_good_random_bytes`.

This ensures that filenames generated using functions such as
`mkstemp()` are suitably randomised and are no longer predictable.

2020-12-22 23:25:26 +01:00

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