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The s shift s bug is reported here
PartialVolume/shredos.x86_64#301
To summarize, if no drives are selected and then the user presses s (lower case) a warning appears indicating that the user should press S (upper case) to start the wipe. This warning appears for about 3 seconds but during this time if the user presses S (upper case) nwipe would immediately complete, having wiped no drives and requesting the user to press the spacebar to exit. The is incorrect behaviour.
The bug doesn't appear if the user pressed S after the 3 seconds elapsed and the warning message disappeared.
This patch fixes this so that it does not exit but displays the warning for 3 seconds and then waits for input.