/usr/lib/perl5/Tk/pTk/default.h is in perl-tk 1:804.031-1build1.
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 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  | /*
 * default.h --
 *
 *	This file defines the defaults for all options for all of
 *	the Tk widgets.
 *
 * Copyright (c) 1991-1994 The Regents of the University of California.
 * Copyright (c) 1994 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: default.h,v 1.4 2002/08/31 06:12:19 das Exp $
 */
#ifndef _DEFAULT
#define _DEFAULT
#if defined(__WIN32__) || defined(_WIN32) || \
    (defined(__CYGWIN__) && !defined(WINARCH_X)) || defined(__MINGW32__)
#   include "tkWinDefault.h"
#else
#   if defined(MAC_OSX_TK)
#	include "tkMacOSXDefault.h"
#   elif defined(MAC_TCL)
#	include "tkMacDefault.h"
#   else
#      ifdef __PM__
#         include "tkOS2Default.h"
#      else
#         include "tkUnixDefault.h"
#      endif
#   endif
#endif
#endif /* _DEFAULT */
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