C / C++ / MFC

<br />
#include <stdio.h><br />
#include <windows.h><br />
<br />
typedef int TBK_BOOL;<br />
typedef int TBK_PERMISSIONS;<br />
<br />
#define TBK_TRUE 1<br />
#define TBK_FALSE 0<br />
<br />
#define F_OK		0	/* exists */<br />
#define X_OK		1	/* executable */<br />
#define W_OK		2	/* writable */<br />
#define R_OK		4	/* readable */<br />
#define D_OK		8	/* deletable */<br />
<br />
static TBK_BOOL win32_access(<br />
  const char    * os_path,<br />
  TBK_PERMISSIONS permissions )<br />
{<br />
  DWORD  dwDesiredAccess;<br />
<br />
    /* Convert the permitions */<br />
  switch( permissions ) {<br />
    case F_OK :<br />
      return TBK_TRUE; // existance has been checked<br />
<br />
    case R_OK :<br />
      dwDesiredAccess = GENERIC_READ;<br />
      break;<br />
<br />
    case W_OK :<br />
      dwDesiredAccess = GENERIC_WRITE;<br />
      break;<br />
<br />
    case X_OK :<br />
      dwDesiredAccess = GENERIC_EXECUTE;<br />
	  break;<br />
<br />
    case D_OK :<br />
      dwDesiredAccess = DELETE;<br />
	  break;<br />
<br />
    default :<br />
        /* Should record an error for unknown access */<br />
      return TBK_FALSE;<br />
  }<br />
<br />
     // Declare here the local variables to avoid premature contructors<br />
GENERIC_MAPPING      genericMapping = { READ_CONTROL | FILE_READ_DATA | FILE_READ_ATTRIBUTES | FILE_READ_EA,<br />
                                          FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA |   FILE_WRITE_DATA | FILE_APPEND_DATA,<br />
                                          READ_CONTROL | FILE_READ_ATTRIBUTES | FILE_EXECUTE,<br />
                                          FILE_ALL_ACCESS } ;<br />
  LPCTSTR              lpFilePath     = LPCTSTR(os_path);<br />
  PSECURITY_DESCRIPTOR pSD            = NULL ;<br />
  DWORD                dwLenNeeded    = 0;<br />
  HANDLE               hHeap          = GetProcessHeap();<br />
<br />
  PRIVILEGE_SET privileges;<br />
  DWORD         dwGrandedAccess, dwPrivilegeLength;<br />
  BOOL          bSuccess,        bAccessGranded;<br />
  HANDLE        hProcess,        hToken;<br />
<br />
  fprintf(stderr, "Start checking access for %s\n", os_path);<br />
<br />
      // Get the length of the security structure<br />
  GetFileSecurity( lpFilePath ,<br />
                   OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,<br />
                   pSD, 0, &dwLenNeeded );<br />
<br />
      // Allocate memory for the structure<br />
  pSD = HeapAlloc(hHeap, HEAP_GENERATE_EXCEPTIONS, dwLenNeeded);<br />
  if( pSD == NULL )<br />
  {<br />
    DWORD  dwError = GetLastError();<br />
    LPVOID lpError;<br />
<br />
    FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM , NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpError, NULL, NULL);<br />
<br />
    fprintf(stderr, "Cannot allocate memory for security descriptor.\n", (LPCTSTR) lpError );<br />
<br />
    return TBK_FALSE;<br />
  }<br />
<br />
      // Read now the proper security<br />
  bSuccess = GetFileSecurity( lpFilePath,<br />
                   OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,<br />
                   pSD, dwLenNeeded, &dwLenNeeded );<br />
  if( bSuccess == FALSE ) {<br />
    DWORD  dwError = GetLastError();<br />
    LPVOID lpError;<br />
<br />
    FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM , NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpError, NULL, NULL);<br />
<br />
<br />
    fprintf(stderr, "Cannot get security id. Buffer len is %d. Error %s\n", dwLenNeeded, (LPCTSTR) lpError );<br />
<br />
<br />
    return TBK_FALSE;<br />
  }<br />
     // Get the current process pseudo-handle.<br />
  hProcess = GetCurrentProcess();<br />
<br />
     // Get the access toke of the current process. This is a real handle<br />
  bSuccess = OpenProcessToken(hProcess, TOKEN_QUERY, &hToken);<br />
  if( bSuccess == FALSE )<br />
    fprintf(stderr, "Cannot get Process Access Token.\n");<br />
<br />
  fprintf(stderr, "Access asked %x.\n", dwDesiredAccess);<br />
  MapGenericMask(&dwDesiredAccess, &genericMapping);<br />
  fprintf(stderr, "Access to examine %x.\n", dwDesiredAccess);<br />
<br />
     // Finaly do the access checks<br />
  bSuccess = AccessCheck( pSD, hToken, dwDesiredAccess, &genericMapping,<br />
                          &privileges, &dwPrivilegeLength, &dwGrandedAccess,<br />
                          &bAccessGranded );<br />
<br />
  if( bSuccess == FALSE ) {<br />
    DWORD  dwError = GetLastError();<br />
    LPVOID lpError;<br />
<br />
    FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM , NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpError, NULL, NULL);<br />
<br />
<br />
    fprintf(stderr, "Cannot check permissions. Error no %d %s\n", dwError, (LPCTSTR) lpError );<br />
<br />
<br />
    return TBK_FALSE;<br />
  }<br />
<br />
<br />
     // Release the token handle.<br />
  CloseHandle(hToken);<br />
<br />
  HeapFree(hHeap, 0, pSD);<br />
<br />
  fprintf(stderr, "Finish checking access.\n");<br />
<br />
     // return the results.<br />
  return ((bAccessGranded == TRUE) ? TBK_TRUE : TBK_FALSE);<br />
}<br />
<br />
int main(int argc, LPCSTR argv [])<br />
{<br />
	LPCTSTR path = LPCTSTR(argv[1]);<br />
    char c;<br />
<br />
  fprintf(stderr, "About to check %s file.\n", (LPCTSTR) path);<br />
  <br />
  if( win32_access( (LPCTSTR) path, R_OK ) )<br />
    fprintf(stderr, "File is readable\n.");<br />
<br />
  if( win32_access( (LPCTSTR) path, W_OK ) )<br />
    fprintf(stderr, "File is writeable.");<br />
<br />
  if( win32_access( (LPCTSTR) path, X_OK ) )<br />
    fprintf(stderr, "File is executable.");<br />
<br />
  if( win32_access( (LPCTSTR) path, D_OK ) )<br />
    fprintf(stderr, "File is deleteable.");<br />
<br />
  return 0;<br />
}<br />

filename: cat.h<br />
<br />
#include "dog.h"<br />
<br />
namespace Mammal<br />
{<br />
  namespace Dog<br />
  {<br />
    class Collie<br />
    {<br />
       void virtual init( Mammal::Cat::Siamese *siamese );<br />
    }<br />
  }<br />
}<br />
<br />
filename: dog.h<br />
<br />
#include "cat.h"<br />
<br />
namespace Mammal<br />
{<br />
  namespace Cat<br />
  {<br />
    class Siamese<br />
    {<br />
      Mammal::Dog::Collie *collie;<br />
      ...<br />
    }<br />
  }<br />
}