tree 1781128ca976857a8cee4298d964074cf8ca0513
parent 7fc10d3c189860aef239d751e951df3b392a773b
author Pali Rohár <pali@kernel.org> 1645183453 +0100
committer Stefan Roese <sr@denx.de> 1646379485 +0100

tools: kwboot: Fix quitting terminal

Sometimes kwboot after quitting terminal prints error message:

  terminal: Bad address

This is caused by trying to call write() syscall with count of (size_t)-1
bytes.

When quit sequence is split into more read() calls then number of input
bytes (nin) at the end of cycle can underflow and be negative. Fix it.

Fixes: de7514046ea5 ("tools: kwboot: Fix detection of quit esc sequence")
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>