// Copyright 2019-2020 CERN and copyright holders of ALICE O2.

// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.

// All rights not expressly granted are reserved.

//

// This software is distributed under the terms of the GNU General Public

// License v3 (GPL Version 3), copied verbatim in the file "COPYING".

//

// In applying this license CERN does not waive the privileges and immunities

// granted to it by virtue of its status as an Intergovernmental Organization

// or submit itself to any jurisdiction.

///

/// \file ProcessDetails.cxx

/// \author Adam Wegrzynek <adam.wegrzynek@cern.ch>

///

#include "ProcessDetails.h"

#include <unistd.h>

#ifdef O2_MONITORING_OS_MAC

#include <mach-o/dyld.h>

#endif

namespace o2

{

/// ALICE O2 Monitoring system

namespace monitoring

{

ProcessDetails::ProcessDetails()

{

generatePid();

generateProcessName();

generateHostname();

}

inline void ProcessDetails::generatePid()

{

mPid = ::getpid();

}

inline void ProcessDetails::generateProcessName()

{

char buff[255];

#ifdef O2_MONITORING_OS_LINUX

ssize_t len = ::readlink("/proc/self/exe", buff, sizeof(buff) - 1);

if (len != -1) {

buff[len] = '\0';

mProcessName = std::string(buff);

}

#endif

#ifdef O2_MONITORING_OS_MAC

uint32_t size = sizeof(buff);

if (_NSGetExecutablePath(buff, &size) == 0) {

mProcessName = std::string(buff);

}

#endif

if (mProcessName.empty()) {

mProcessName = "<undefined>";

} else {

mProcessName = mProcessName.substr(mProcessName.find_last_of("/") + 1);

}

}

inline void ProcessDetails::generateHostname()

{

char hostname[255];

gethostname(hostname, 255);

mHostname = std::string(hostname);

}

unsigned int ProcessDetails::getPid() const

{

return mPid;

}

std::string ProcessDetails::getProcessName() const

{

return mProcessName;

}

std::string ProcessDetails::getHostname() const

{

return mHostname;

}

} // namespace monitoring

} // namespace o2