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ExecCommand.cpp
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ExecCommand.cpp
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//====================================================================================
// Open Computer and Software Inventory Next Generation
// Copyright (C) 2010 OCS Inventory NG Team. All rights reserved.
// Web: http://www.ocsinventory-ng.org
// This code is open source and may be copied and modified as long as the source
// code is always made freely available.
// Please refer to the General Public Licence V2 http://www.gnu.org/ or Licence.txt
//====================================================================================
// ExecCommand.cpp: implementation for the CExecCommand class.
//////////////////////////////////////////////////////////////////////
#include "StdAfx.h"
#include "ExecCommand.h"
#include "ocs_deploy_tool.h"
#include <io.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <Tlhelp32.h>
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#if ( _MSC_VER >= 1300 )
// Visual studio .NET or higher
#include <stddef.h>
#define TO_INTPTR(x) ((intptr_t)(x))
#else // Visual Studio 6
#define TO_INTPTR(x) ((long)(x))
#endif
// Utility class describing a process running in memory
class CProcessProps : public CObject
{
public:
CProcessProps();
~CProcessProps();
void set( DWORD dwProcessID, DWORD dwParentID, LPCTSTR lpstrImagePath);
void setRunning( BOOL bRunning = TRUE);
DWORD getProcessID();
DWORD getParentID();
LPCTSTR getImagePath();
BOOL isRunning();
protected:
DWORD m_dwProcessID;
DWORD m_dwParentID;
CString m_csImagePath;
BOOL m_bRunning;
};
CProcessProps::CProcessProps()
{
m_dwProcessID = -1;
m_dwParentID = -1;
m_csImagePath.Empty();
m_bRunning = FALSE;
}
CProcessProps::~CProcessProps()
{
}
void CProcessProps::set( DWORD dwProcessID, DWORD dwParentID, LPCTSTR lpstrImagePath)
{
m_dwProcessID = dwProcessID;
m_dwParentID = dwParentID;
m_csImagePath = lpstrImagePath;
m_bRunning = TRUE;
}
void CProcessProps::setRunning( BOOL bRunning)
{
m_bRunning = bRunning;
}
DWORD CProcessProps::getProcessID()
{
return m_dwProcessID;
}
DWORD CProcessProps::getParentID()
{
return m_dwParentID;
}
LPCTSTR CProcessProps::getImagePath()
{
return m_csImagePath;
}
BOOL CProcessProps::isRunning()
{
return m_bRunning;
}
CExecCommand::CExecCommand()
{
initialize();
m_dwTimeout = INFINITE;
m_bComspec = TRUE;
}
CExecCommand::~CExecCommand()
{
closeHandles();
}
void CExecCommand::initialize()
{
m_hProcessHandle = NULL;
m_hChildStdinRd = NULL;
m_hChildStdinWr = NULL;
m_hChildStdoutRd = NULL;
m_hChildStdoutWr = NULL;
m_hChildStdinWrDup = NULL;
m_hChildStdoutRdDup = NULL;
m_fdStdOut = NULL;
m_nExitValue = -1;
m_csOutput.Empty();
}
void CExecCommand::setTimeout( DWORD dwTimeout)
{
m_dwTimeout = dwTimeout;
}
void CExecCommand::useComspec( BOOL bUse)
{
m_bComspec = bUse;
}
LPCSTR CExecCommand::getOutput()
{
return m_csOutput;
}
int CExecCommand::getExitValue()
{
return m_nExitValue;
}
BOOL CExecCommand::closeHandles()
{
BOOL bRet = TRUE;
if (m_fdStdOut > 0)
{
_close( m_fdStdOut);
m_fdStdOut = NULL;
// This will close this as well: this->hChildStdoutRdDup
// m_hChildStdoutRdDup = NULL;
}
if (m_hChildStdinRd && !CloseHandle( m_hChildStdinRd))
{
bRet = FALSE;
}
m_hChildStdinRd = NULL;
if (m_hChildStdinWr && !CloseHandle( m_hChildStdinWr))
{
bRet = FALSE;
}
m_hChildStdinWr = NULL;
if (m_hChildStdoutRd && !CloseHandle( m_hChildStdoutRd))
{
bRet = FALSE;
}
m_hChildStdoutRd = NULL;
if (m_hChildStdoutWr && !CloseHandle( m_hChildStdoutWr))
{
bRet = FALSE;
}
m_hChildStdoutWr = NULL;
if (m_hProcessHandle && !CloseHandle( m_hProcessHandle))
{
bRet = FALSE;
}
m_hProcessHandle = NULL;
return bRet;
}
DWORD CExecCommand::realCreateProcess(LPCTSTR lpstrCommand, LPCTSTR lpstrPath, BOOL bCapture)
{
PROCESS_INFORMATION piProcInfo;
STARTUPINFO siStartInfo;
CString csComspec,
csCommand;
static DWORD dwProcessID = 0;
ASSERT( lpstrCommand);
if (m_bComspec)
{
// Find COMSPEC environnement variable to start process
if (!csComspec.GetEnvironmentVariable( _T( "COMSPEC")))
{
/*
* Oh gag, we're on Win9x or using COMMAND.COM. Not supported
*/
m_csOutput.Format( "Get COMSPEC Error: %s", GetAnsiFromUnicode( LookupError( GetLastError())));
return 0;
}
csCommand.Format( _T( "\"%s\" /c %s"), csComspec, lpstrCommand);
}
else
// Do not use COMSPEC to start process => full path for command must be provided
csCommand = lpstrCommand;
ZeroMemory(&siStartInfo, sizeof(STARTUPINFO));
siStartInfo.cb = sizeof(STARTUPINFO);
if (bCapture)
{
// Capture stdin/stdout/stderr
siStartInfo.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
siStartInfo.hStdInput = m_hChildStdinRd;
siStartInfo.hStdOutput = m_hChildStdoutWr;
siStartInfo.hStdError = m_hChildStdoutWr;
}
else
// No capture
siStartInfo.dwFlags = STARTF_USESHOWWINDOW;
siStartInfo.wShowWindow = SW_HIDE;
if (!CreateProcess( NULL, csCommand.GetBuffer(), NULL, NULL, TRUE,
0, //CREATE_NEW_CONSOLE,
NULL, lpstrPath, &siStartInfo, &piProcInfo))
{
m_csOutput.Format( "CreateProcess Error: %s", GetAnsiFromUnicode( LookupError( GetLastError())));
return 0;
}
// Close the handles now so anyone waiting is woken.
CloseHandle( piProcInfo.hThread);
// Return process handle
m_hProcessHandle = piProcInfo.hProcess;
dwProcessID = piProcInfo.dwProcessId;
return dwProcessID;
}
BOOL CExecCommand::startProcessCapture(LPCTSTR lpstrCommand, LPCTSTR lpstrPath)
{
SECURITY_ATTRIBUTES saAttr;
ASSERT( lpstrCommand);
initialize();
saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
saAttr.bInheritHandle = TRUE;
saAttr.lpSecurityDescriptor = NULL;
////////////////////////////////////////////////////////////////
// Capture stdin
if (!CreatePipe(&m_hChildStdinRd, &m_hChildStdinWr, &saAttr, 0))
{
m_csOutput.Format( "CreatePipe Error: %s", GetAnsiFromUnicode( LookupError( GetLastError())));
return FALSE;
}
/* Create new output read handle and the input write handle. Set
* the inheritance properties to FALSE. Otherwise, the child inherits
* these handles; resulting in non-closeable handles to the pipes
* being created. */
if (!DuplicateHandle( GetCurrentProcess(), m_hChildStdinWr, GetCurrentProcess(), &m_hChildStdinWrDup, 0,
FALSE, DUPLICATE_SAME_ACCESS))
{
m_csOutput.Format( "DuplicateHandle Error");
return FALSE;
}
// Close the inheritable version of ChildStdin that we're using.
CloseHandle( m_hChildStdinWr);
m_hChildStdinWr = NULL;
////////////////////////////////////////////////////////////////
// Capture stdout and stderr
if (!CreatePipe(&m_hChildStdoutRd, &m_hChildStdoutWr, &saAttr, 0))
{
m_csOutput.Format( "CreatePipe Error: %s", GetAnsiFromUnicode( LookupError( GetLastError())));
return FALSE;
}
if (!DuplicateHandle( GetCurrentProcess(), m_hChildStdoutRd, GetCurrentProcess(), &m_hChildStdoutRdDup, 0,
FALSE, DUPLICATE_SAME_ACCESS))
{
m_csOutput.Format( "DuplicateHandle Error");
return FALSE;
}
// Close the inheritable version of ChildStdout that we're using.
CloseHandle( m_hChildStdoutRd);
m_hChildStdoutRd = NULL;
// Associates a C run-time file descriptor with an existing operating-system file handle
// It's easier to use for the console
if ((m_fdStdOut = _open_osfhandle(TO_INTPTR(m_hChildStdoutRdDup), _O_RDONLY|_O_TEXT)) == -1)
{
m_csOutput.Format( "_open_osfhandle Error");
return FALSE;
}
if (realCreateProcess( lpstrCommand, lpstrPath, TRUE) == 0)
{
// m_csOuput already conatins error description
return FALSE;
}
return TRUE;
}
int CExecCommand::execWait( LPCTSTR lpstrCommand, LPCTSTR lpstrPath, BOOL bCapture)
{
ASSERT( lpstrCommand);
try
{
initialize();
if (bCapture)
{
// Initialize environnement for capturing stdout and stderr
// then start process
if (!startProcessCapture( lpstrCommand, lpstrPath))
{
closeHandles();
return EXEC_ERROR_START_COMMAND;
}
}
else
{
// Just start process
if (realCreateProcess( lpstrCommand, lpstrPath) == 0)
{
closeHandles();
return EXEC_ERROR_START_COMMAND;
}
}
// Wait for process ending, capturing stdout/stderr if needed
if (!wait( bCapture))
{
closeHandles();
return EXEC_ERROR_WAIT_COMMAND;
}
closeHandles();
return EXEC_SUCCESSFULL;
}
catch( CException *pEx)
{
pEx->Delete();
closeHandles();
m_csOutput = "Unhandled exception Error";
return EXEC_ERROR_START_COMMAND;
}
}
int CExecCommand::execNoWait( LPCTSTR lpstrCommand, LPCTSTR lpstrPath)
{
try
{
ASSERT( lpstrCommand);
// Start process
initialize();
if (realCreateProcess( lpstrCommand, lpstrPath) == 0)
{
closeHandles();
return EXEC_ERROR_START_COMMAND;
}
closeHandles();
return EXEC_SUCCESSFULL;
}
catch (CException *pEx)
{
pEx->Delete();
closeHandles();
m_csOutput = "Unhandled exception Error";
return EXEC_ERROR_START_COMMAND;
}
}
BOOL CExecCommand::wait( BOOL bCapture)
{
int nResult = -1;
DWORD dwExitCode,
dwTime = 0;
char bBuffer[1024];
int nLength;
struct _stat fsOut;
m_csOutput = "";
// If capturing stdout/stderr enabled, and timeout is not reached
while (bCapture && (dwTime < m_dwTimeout))
{
// Each 200 millisecond, store stdout and stderr
dwTime += 200;
if (WaitForSingleObject( m_hProcessHandle, 200) == WAIT_FAILED)
{
m_csOutput.Format( "WaitForSingleObject Error: %s", GetAnsiFromUnicode( LookupError( GetLastError())));
m_nExitValue = -1;
return -1;
}
// Read console output
if ((_fstat( m_fdStdOut, &fsOut) == 0 ) && (fsOut.st_size > 0))
{
// There is something to read
nLength = _read( m_fdStdOut, bBuffer, 1023);
bBuffer[nLength] = 0;
m_csOutput.AppendFormat( "%s", bBuffer);
}
// Check if process still active
if (!GetExitCodeProcess( m_hProcessHandle, &dwExitCode) || (dwExitCode != STILL_ACTIVE))
{
// Process not active, exit loop
break;
}
}
// Wait for process ending (not capturing output or error capturing output)
if (GetExitCodeProcess( m_hProcessHandle, &dwExitCode))
{
nResult = dwExitCode;
}
else
{
m_csOutput.Format( "GetExitCode Error: %s", GetAnsiFromUnicode( LookupError( GetLastError())));
nResult = -1;
}
m_nExitValue = nResult;
return (nResult >= 0);
}
int CExecCommand::execWaitForAllChilds( LPCTSTR lpstrCommand, LPCTSTR lpstrPath)
{
CObArray myProcessList;
CProcessProps *pProcess;
DWORD dwExitCode,
dwProcessID,
dwTime = 0;
try
{
ASSERT( lpstrCommand);
// Start process
initialize();
if ((dwProcessID = realCreateProcess( lpstrCommand, lpstrPath)) == 0)
{
closeHandles();
return EXEC_ERROR_START_COMMAND;
}
// We need high priority on OS to follow thread/process created by main command
SetPriorityClass( GetCurrentProcess(), HIGH_PRIORITY_CLASS);
// Store first process
pProcess = new CProcessProps();
pProcess->set( dwProcessID, GetCurrentProcessId(), lpstrCommand);
myProcessList.Add( pProcess);
// While there is running processes or timeout not reached
while ((myProcessList.GetCount() > 0) && (dwTime < m_dwTimeout))
{
// Parse memory processes for new childs process or terminated processes
if (!parseRunningProcesses( &myProcessList))
{
SetPriorityClass( GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
m_csOutput.Format( "Parse running processes Error: %s", GetAnsiFromUnicode( LookupError( GetLastError())));
freeProcessList( &myProcessList);
closeHandles();
return EXEC_ERROR_WAIT_COMMAND;
}
Sleep( EXEC_WAIT_CHECK_LATENCY);
dwTime += EXEC_WAIT_CHECK_LATENCY;
}
freeProcessList( &myProcessList);
// Now return to normal prioity
SetPriorityClass( GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
// Get exit code
if (GetExitCodeProcess( m_hProcessHandle, &dwExitCode))
{
m_nExitValue = dwExitCode;
}
else
{
m_nExitValue = -1;
m_csOutput.Format( "GetExitCode Error: %s", GetAnsiFromUnicode( LookupError( GetLastError())));
closeHandles();
return EXEC_ERROR_WAIT_COMMAND;
}
closeHandles();
return EXEC_SUCCESSFULL;
}
catch (CException *pEx)
{
pEx->Delete();
closeHandles();
m_csOutput = "Unhandled exception Error";
return EXEC_ERROR_START_COMMAND;
}
}
BOOL CExecCommand::parseRunningProcesses( CObArray *pProcessList)
{
HANDLE hSnapshot = NULL;
BOOL bRet = FALSE;
PROCESSENTRY32 pe32;
INT_PTR uIndex;
CProcessProps *pProc;
try
{
// Take a snapshot of running processes
if ((hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)) == INVALID_HANDLE_VALUE)
return FALSE;
pe32.dwSize = sizeof(PROCESSENTRY32);
// By default, set all already listed processes as not running
for (uIndex=0; uIndex<pProcessList->GetCount(); uIndex++)
{
pProc = (CProcessProps *) pProcessList->GetAt( uIndex);
pProc->setRunning( FALSE);
}
// Check each process in memory
for (bRet = Process32First(hSnapshot, &pe32); bRet; bRet = Process32Next(hSnapshot, &pe32))
{
// Check if process is already listed and set it is running
if (!isProcessListed( pProcessList, pe32.th32ProcessID))
{
// This is not a listed process, is the parent listed
if (isProcessListed( pProcessList, pe32.th32ParentProcessID))
{
// Parent process is listed, so register we have to wait for this process
pProc = new CProcessProps;
pProc->set( pe32.th32ProcessID, pe32.th32ParentProcessID, pe32.szExeFile);
pProcessList->Add( pProc);
}
}
}
CloseHandle( hSnapshot);
hSnapshot = NULL;
// Now, remove from list all processes not running
for (uIndex=0; uIndex<pProcessList->GetCount(); uIndex++)
{
pProc = (CProcessProps *) pProcessList->GetAt( uIndex);
if (!pProc->isRunning())
{
pProcessList->RemoveAt( uIndex);
delete pProc;
}
}
return TRUE;
}
catch (CException *pEx)
{
if (hSnapshot != NULL)
CloseHandle( hSnapshot);
pEx->Delete();
return FALSE;
}
}
BOOL CExecCommand::isProcessListed( CObArray *pProcessList, DWORD dwProcessID)
{
INT_PTR uIndex;
CProcessProps *pProc;
for (uIndex=0; uIndex<pProcessList->GetCount(); uIndex++)
{
pProc = (CProcessProps *) pProcessList->GetAt( uIndex);
if (pProc->getProcessID() == dwProcessID)
{
pProc->setRunning();
return TRUE;
}
}
return FALSE;
}
BOOL CExecCommand::freeProcessList( CObArray *pProcessList)
{
INT_PTR uIndex;
CProcessProps *pProc;
try
{
// By default, set all already listed processes as not running
for (uIndex=0; uIndex<pProcessList->GetCount(); uIndex++)
{
pProc = (CProcessProps *) pProcessList->GetAt( uIndex);
delete pProc;
}
pProcessList->RemoveAll();
return TRUE;
}
catch (CException *pEx)
{
pEx->Delete();
return FALSE;
}
}