Andreas Kling 0a1865ebc6 Kernel: read() and write() should fail with EBADF for wrong mode fd's ...

It was previously possible to write to read-only file descriptors,
and read from write-only file descriptors.

All FileDescription objects now start out non-readable + non-writable,
and whoever is creating them has to "manually" enable reading/writing
by calling set_readable() and/or set_writable() on them.

2020-01-03 03:29:59 +01:00

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