[lxc-devel] lxc-console: batched read

[Michael Tokarev]

Currently, lxc-console is quite too slow, because
it is doing I/O one char at a time.  For input,
which most likely goes from keyboard, it is not a
problem really.  But for output (from container)
it is quite time-consuming and slow.

Instead of reading one-char-at-a-time, let's read
buffer-at-a-time.  The attached patch does just that.

Thanks!

/mjt
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