flashrom_tester: Write a newline with the wp prompt

Write a newline after the hardware write protect prompt. Automated tests
read stdout and wait for this message, and split on newline, so write a
newline.

Also modify the function to not be recursive. Try to handle a closed
input correctly - panicing in that case. Behaviour is now to wait for
a newline instead of for 1 character.

BUG=b:240512896
BRANCH=None
TEST=tast run localhost:2222 firmware.FlashromTester
TEST=flashrom_tester < /dev/null
TEST=flashrom_tester; type some things, hold enter, then close stdin

Change-Id: I07ec242ca0d41787030d5d27fc88d78ed884d746
Signed-off-by: Evan Benn <evanbenn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/flashrom/+/3809595
Reviewed-by: Nikolai Artemiev <nartemiev@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/66587
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>

0 files changed, 0 insertions, 0 deletions