/usr/share/octave/packages/io-2.4.5/private/__COM_chk_sprt__.m is in octave-io 2.4.5-1.
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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | ## Copyright (C) 2014-2016 Philip Nienhuis
##
## This program 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.
##
## This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{retval} =} __COM_chk_sprt__ (@var{dbug})
## Undocumented internal function
##
## @seealso{}
## @end deftypefn
## Author: Philip Nienhuis <prnienhuis@users.sf.net>
## Created: 2014-10-31
function [retval] = __COM_chk_sprt__ (dbug)
retval = false;
if (dbug >= 1)
printf ("Checking Excel/ActiveX/COM... ");
endif
try
app = actxserver ("Excel.application");
## If we get here, the call succeeded & COM works.
xlsinterfaces.COM = 1;
## Close Excel to avoid zombie Excel invocation
app.Quit();
delete(app);
if (dbug >= 1)
printf ("OK.\n\n");
endif
retval = true;
catch
## COM not supported
if (dbug >= 1)
printf ("not working.\n");
endif
## Check if Windows package is installed and loaded
pkglist = pkg ("list");
winpkgind = find (cellfun (@(x) strcmp(x.name, "windows"), pkglist), 1, "first");
if (! isempty (winpkgind))
winpkg = pkglist{winpkgind};
if (winpkg.loaded && dbug)
printf ("MS-Excel couldn't be started although OF windows is loaded...\n");
endif
elseif (dbug >= 1)
printf ("(OF windows package is required for COM/ActiveX support)\n");
endif
end_try_catch
endfunction
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