/*
 * SystemBackendPosix.cpp
 *
 * Copyright (C) 2008 Matthias Schiffer <matthias@gamezock.de>
 *
 * This program 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.
 *
 * 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "SystemBackendPosix.h"

#include <Core/ThreadManager.h>

#include <stdio.h>
#include <stdlib.h>

namespace Mad {
namespace Modules {
namespace SystemBackendPosix {

void SystemBackendPosix::getFSInfo(std::vector<Common::SystemManager::FSInfo> *fsInfo) throw(Core::Exception) {
  application->getThreadManager()->detach();

  FILE *pipe = popen("df -P -k", "r");
  if(!pipe)
    throw(Core::Exception(Core::Exception::NOT_AVAILABLE));

  char buffer[1024];
  std::string output;

  while(!feof(pipe)) {
    if(fgets(buffer, sizeof(buffer), pipe) != 0)
      output += buffer;
  }

  pclose(pipe);

  if(!fsInfo)
    return;

  fsInfo->clear();

  std::istringstream stream(output);
  std::string str;

  std::getline(stream, str); // ignore first line

  while(!stream.eof()) {
    std::getline(stream, str);

    char *fsName = new char[str.length()+1];
    char *mountedOn = new char[str.length()+1];

    Common::SystemManager::FSInfo info;

    if(std::sscanf(str.c_str(), "%s %lld %lld %lld %*d%% %s", fsName, &info.total, &info.used, &info.available, mountedOn) == 5) {
      info.fsName = fsName;
      info.mountedOn = mountedOn;

      fsInfo->push_back(info);
    }

    delete [] fsName;
    delete [] mountedOn;
  }

  return;
}

void SystemBackendPosix::shutdown() throw(Core::Exception) {
  application->getThreadManager()->detach();

  if(system("halt") != 0)
    throw(Core::Exception(Core::Exception::NOT_AVAILABLE));
}

void SystemBackendPosix::reboot() throw(Core::Exception) {
  application->getThreadManager()->detach();

  if(system("reboot") != 0)
    throw(Core::Exception(Core::Exception::NOT_AVAILABLE));
}

}
}
}