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/************************************************************************
*
* Copyright (C) 2009-2024 IRCAD France
* Copyright (C) 2012-2020 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight 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 3 of the License, or
* (at your option) any later version.
*
* Sight 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 Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "core/tools/system.hpp"
#include "core/os/temp_path.hpp"
#include <core/base.hpp>
#include <filesystem>
#include <fstream>
#include <regex>
#include <boost/lexical_cast.hpp>
// for PID
#ifdef WIN32
#include <wtypes.h>
#include <windows.h>
#include <process.h>
#else
#include <csignal>
#include <sys/types.h>
#include <unistd.h>
#endif
#include <utility>
namespace sight::core::tools
{
//------------------------------------------------------------------------------
int system::get_pid() noexcept
{
int pid = 0;
#ifdef WIN32
pid = _getpid();
#else
pid = getpid();
#endif
return pid;
}
//------------------------------------------------------------------------------
bool system::is_process_running(int _pid) noexcept
{
#ifdef WIN32
HANDLE h_process = OpenProcess(SYNCHRONIZE, FALSE, _pid);
if(!h_process)
{
return false;
}
else
{
CloseHandle(h_process);
return true;
}
#else
return kill(_pid, 0) == 0;
#endif
}
//------------------------------------------------------------------------------
void system::kill_process(int _pid) noexcept
{
#ifdef WIN32
HANDLE h_process = OpenProcess(PROCESS_TERMINATE, FALSE, _pid);
if(h_process)
{
TerminateProcess(h_process, 0);
CloseHandle(h_process);
}
#else
kill(_pid, SIGKILL);
#endif
}
//------------------------------------------------------------------------------
void system::robust_rename(
const std::filesystem::path& _p1,
const std::filesystem::path& _p2,
bool _force
)
{
// If both paths are indeed the same, do nothing
if(_p1.lexically_normal().compare(_p2.lexically_normal()) == 0)
{
return;
}
std::error_code error;
// Try a basic rename.
std::filesystem::rename(_p1, _p2, error);
if(error)
{
// Try to remove target if force is enabled
if(_force)
{
std::filesystem::remove(_p2);
}
if(error == std::make_error_code(std::errc::cross_device_link))
{
std::filesystem::copy(_p1, _p2, error);
if(error == std::make_error_code(std::errc::operation_not_permitted))
{
// This happens on copying on different filesystem types, i.e. EXT4 -> NTFS
// In this case we use an alternative but less performant copy function
std::filesystem::remove(_p2);
std::ifstream src(_p1.string(), std::ios::binary);
std::ofstream dst(_p2.string(), std::ios::binary);
dst << src.rdbuf();
}
std::filesystem::remove(_p1);
}
else
{
// This will throw the expected exception
std::filesystem::rename(_p1, _p2);
}
}
}
} //end namespace sight::core::tools
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