/usr/include/ns3/system-path.h is in libns3-dev 3.13+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Copyright (c) 2008 INRIA
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
*/
#ifndef SYSTEM_PATH
#define SYSTEM_PATH
#include <string>
#include <list>
namespace ns3 {
/**
* \brief Encapsulate OS-specific functions to manipulate file and directory paths.
*
* The functions provided here are used mostly to implement the ns-3 test framework.
*/
namespace SystemPath {
/**
* \return the directory in which the currently-executing binary is located
*/
std::string FindSelfDirectory (void);
/**
* \param left a path element
* \param right a path element
* \return a concatenation of the two input paths
*/
std::string Append (std::string left, std::string right);
/**
* \param path a path
* \return a list of path elements that can be joined together again with
* the Join function.
* \sa ns3::SystemPath::Join
*/
std::list<std::string> Split (std::string path);
/**
* \param begin iterator to first element to join
* \param end iterator to last element to join
* \return a path that is a concatenation of all the input elements.
*/
std::string Join (std::list<std::string>::const_iterator begin,
std::list<std::string>::const_iterator end);
/**
* \param path a path which identifies a directory
* \return a list of the filenames which are located in the input directory
*/
std::list<std::string> ReadFiles (std::string path);
/**
* \return a path which identifies a temporary directory.
*
* The returned path identifies a directory which does not exist yet
* Call ns3::SystemPath::MakeDirectories to create it. Yes, there is a
* well-known security race in this API but we don't care in ns-3.
*/
std::string MakeTemporaryDirectoryName (void);
/**
* \param path a path to a directory
*
* Create all the directories leading to path.
*/
void MakeDirectories (std::string path);
} // namespace SystemPath
} // namespace ns3
#endif /* SYSTEM_PATH */
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