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Process_WIN32.cpp

//
// Process_WIN32.cpp
//
// $Id: //poco/1.3/Foundation/src/Process_WIN32.cpp#2 $
//
// Library: Foundation
// Package: Processes
// Module:  Process
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Process_WIN32.h"
#include "Poco/Exception.h"
#include "Poco/NumberFormatter.h"
#include "Poco/NamedEvent.h"
#include "Poco/Pipe.h"


namespace Poco {


//
// ProcessHandleImpl
//
ProcessHandleImpl::ProcessHandleImpl(HANDLE hProcess, UInt32 pid):
      _hProcess(hProcess),
      _pid(pid)
{
}


ProcessHandleImpl::~ProcessHandleImpl()
{
      CloseHandle(_hProcess);
}


UInt32 ProcessHandleImpl::id() const
{
      return _pid;
}


int ProcessHandleImpl::wait() const
{
      DWORD rc = WaitForSingleObject(_hProcess, INFINITE);
      if (rc != WAIT_OBJECT_0)
            throw SystemException("Wait failed for process", NumberFormatter::format(_pid));

      DWORD exitCode;
      if (GetExitCodeProcess(_hProcess, &exitCode) == 0)
            throw SystemException("Cannot get exit code for process", NumberFormatter::format(_pid));

      return exitCode;
}


//
// ProcessImpl
//
ProcessImpl::PIDImpl ProcessImpl::idImpl()
{
      return GetCurrentProcessId(); 
}


void ProcessImpl::timesImpl(long& userTime, long& kernelTime)
{
      FILETIME ftCreation;
      FILETIME ftExit;
      FILETIME ftKernel;
      FILETIME ftUser;

      if (GetProcessTimes(GetCurrentProcess(), &ftCreation, &ftExit, &ftKernel, &ftUser) != 0)
      {
            ULARGE_INTEGER time;
            time.LowPart  = ftKernel.dwLowDateTime;
            time.HighPart = ftKernel.dwHighDateTime;
            kernelTime    = long(time.QuadPart/10000000L);
            time.LowPart  = ftUser.dwLowDateTime;
            time.HighPart = ftUser.dwHighDateTime;
            userTime      = long(time.QuadPart/10000000L);
      }
      else
      {
            userTime = kernelTime = -1;
      }
}


ProcessHandleImpl* ProcessImpl::launchImpl(const std::string& command, const ArgsImpl& args, Pipe* inPipe, Pipe* outPipe, Pipe* errPipe)
{
      std::string commandLine = command;
      for (ArgsImpl::const_iterator it = args.begin(); it != args.end(); ++it)
      {
            commandLine.append(" ");
            commandLine.append(*it);
      }           

      STARTUPINFO startupInfo;
      GetStartupInfo(&startupInfo); // take defaults from current process
      startupInfo.cb          = sizeof(STARTUPINFO);
      startupInfo.lpReserved  = NULL;
      startupInfo.lpDesktop   = NULL;
      startupInfo.lpTitle     = NULL;
      startupInfo.dwFlags     = STARTF_FORCEOFFFEEDBACK | STARTF_USESTDHANDLES;
      startupInfo.cbReserved2 = 0;
      startupInfo.lpReserved2 = NULL;
      
      HANDLE hProc = GetCurrentProcess();
      if (inPipe)
      {
            DuplicateHandle(hProc, inPipe->readHandle(), hProc, &startupInfo.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
            inPipe->close(Pipe::CLOSE_READ);
      }
      else DuplicateHandle(hProc, GetStdHandle(STD_INPUT_HANDLE), hProc, &startupInfo.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
      // outPipe may be the same as errPipe, so we duplicate first and close later.
      if (outPipe)
            DuplicateHandle(hProc, outPipe->writeHandle(), hProc, &startupInfo.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
      else
            DuplicateHandle(hProc, GetStdHandle(STD_OUTPUT_HANDLE), hProc, &startupInfo.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
      if (errPipe)
            DuplicateHandle(hProc, errPipe->writeHandle(), hProc, &startupInfo.hStdError, 0, TRUE, DUPLICATE_SAME_ACCESS);
      else
            DuplicateHandle(hProc, GetStdHandle(STD_ERROR_HANDLE), hProc, &startupInfo.hStdError, 0, TRUE, DUPLICATE_SAME_ACCESS);
      if (outPipe) outPipe->close(Pipe::CLOSE_WRITE);
      if (errPipe) errPipe->close(Pipe::CLOSE_WRITE);

      PROCESS_INFORMATION processInfo;
      BOOL rc = CreateProcessA(
            NULL, 
            const_cast<char*>(commandLine.c_str()), 
            NULL, 
            NULL, 
            TRUE, 
            0, 
            NULL, 
            NULL, 
            &startupInfo, 
            &processInfo
      );
      CloseHandle(startupInfo.hStdInput);
      CloseHandle(startupInfo.hStdOutput);
      CloseHandle(startupInfo.hStdError);
      if (rc)
      {
            CloseHandle(processInfo.hThread);
            return new ProcessHandleImpl(processInfo.hProcess, processInfo.dwProcessId);
      }
      else throw SystemException("Cannot launch process", command);
}


void ProcessImpl::killImpl(PIDImpl pid)
{
      HANDLE hProc = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
      if (hProc)
      {
            if (TerminateProcess(hProc, 0) == 0)
            {
                  CloseHandle(hProc);
                  throw SystemException("cannot kill process");
            }
            CloseHandle(hProc);
      }
      else
      {
            switch (GetLastError())
            {
            case ERROR_ACCESS_DENIED:
                  throw NoPermissionException("cannot kill process");
            case ERROR_NOT_FOUND: 
                  throw NotFoundException("cannot kill process");
            default:
                  throw SystemException("cannot kill process");
            }
      }
}


void ProcessImpl::requestTerminationImpl(PIDImpl pid)
{
      std::string evName("POCOTRM");
      evName.append(NumberFormatter::formatHex(pid, 8));
      NamedEvent ev(evName);
      ev.set();
}


} // namespace Poco

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