/usr/share/psychtoolbox-3/PsychHardware/PsychGamepad/AxisUp.m is in psychtoolbox-3-common 3.0.11.20131230.dfsg1-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | function result = AxisUp
% Returns a constant for axes in the extreme up position
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% 08/19/01 awi wrote it.
result = -32768;
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