Also fixes an issue where program exits when terminal resized but
only after all the wipes have finished. You can now resize the
terminal, before, during and after the wipes have completed and
the windows are now all correctly updated and sized.
Updated version to 0.28-pre-release
Removed unnecessary zero of gui thread pointer.
Created six new functions in gui.c in order to fix the above problem
and reduce existing duplicated code.
I could not find the original specification of this standard, although
many proprietary implementations exist (or claim to exist). Also there
are many 3rd-party descriptions of the method, which often differ in one
or another detail, but after some reading I could conclude that the most
likely definition should be as follows:
1. Fill the device with zeroes, do not verify.
2. Fill the device with ones, do not verify.
3. Fill the device with a PRNG stream, do verify.
In other words, this is a simplified version of nwipe's "dodshort".
Both display_help() and nwipe_options_parse() are consistent about the
--noblank option, in that it exists and has no short form. Make the man
page and nwipe_gui_noblank() indicate that correctly. Mention that "ops2"
never blanks the device regardless of the option.
