/usr/share/doc/libcxxtools-dev/examples/dlloader.cpp is in libcxxtools-dev 2.2.1-1.
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 62 63 64 65 66 67 68 69 70 71 72 73 | /*
* Copyright (C) 2003 Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <exception>
#include <iostream>
#include <cxxtools/dlloader.h>
#include <cxxtools/log.h>
typedef double (*function_type)(double);
// to run the program you may have to set LTDL_LIBRARY_PATH
// to the path of libm.so
int main(int argc, char* argv[])
{
try
{
log_init();
if (argc == 1)
{
std::cout << "load libm.so" << std::endl;
cxxtools::dl::Library lib("m");
std::cout << "sym cos" << std::endl;
function_type cosine = (function_type)(lib["cos"]);
std::cout << "call cos" << std::endl;
std::cout << "cos(2.0) = " << cosine(2.0) << std::endl;
}
else
{
std::cout << "load " << argv[1] << std::endl;
cxxtools::dl::Library lib(argv[1]);
for (int a = 2; argv[a]; ++a)
{
std::cout << "sym " << argv[a] << std::endl;
cxxtools::dl::Symbol sym = lib.getSymbol(argv[a]);
std::cout << " => " << static_cast<void*>(sym) << std::endl;
}
}
}
catch (const std::exception& e)
{
std::cerr << e.what() << std::endl;
}
}
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