/usr/share/lilypond/2.16.2/fonts/source/feta-noteheads-generic.mf is in lilypond-data 2.16.2-3.
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 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | % Feta (not the Font-En-Tja) music font -- generic stuff: include lots of files, but don't
% This file is part of LilyPond, the GNU music typesetter.
%
% Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
%
%
% LilyPond is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% LilyPond is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
if test = -1:
mode := smoke;
fi
staffsize# := design_size * pt#;
mode_setup;
input feta-macros;
input feta-params;
font_x_height staff_space#;
fet_beginfont ("feta", design_size, "fetaMusic");
input feta-noteheads;
autometric_parameter ("staffsize", staffsize#);
autometric_parameter ("stafflinethickness", stafflinethickness#);
autometric_parameter ("staff_space", staff_space#);
autometric_parameter ("linethickness", linethickness#);
autometric_parameter ("black_notehead_width", black_notehead_width#);
autometric_parameter ("ledgerlinethickness", ledgerlinethickness#);
autometric_parameter ("blot_diameter", blot_diameter#);
fet_endfont;
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