Message347076
Series of operations needed to answer the questions os.access is not answering on windows:
bool CanAccessFolder( LPCTSTR folderName, DWORD genericAccessRights )
{
bool bRet = false;
DWORD length = 0;
if (!::GetFileSecurity( folderName, OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION
| DACL_SECURITY_INFORMATION, NULL, NULL, &length ) &&
ERROR_INSUFFICIENT_BUFFER == ::GetLastError()) {
PSECURITY_DESCRIPTOR security = static_cast< PSECURITY_DESCRIPTOR >( ::malloc( length ) );
if (security && ::GetFileSecurity( folderName, OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION
| DACL_SECURITY_INFORMATION, security, length, &length )) {
HANDLE hToken = NULL;
if (::OpenProcessToken( ::GetCurrentProcess(), TOKEN_IMPERSONATE | TOKEN_QUERY |
TOKEN_DUPLICATE | STANDARD_RIGHTS_READ, &hToken )) {
HANDLE hImpersonatedToken = NULL;
if (::DuplicateToken( hToken, SecurityImpersonation, &hImpersonatedToken )) {
GENERIC_MAPPING mapping = { 0xFFFFFFFF };
PRIVILEGE_SET privileges = { 0 };
DWORD grantedAccess = 0, privilegesLength = sizeof( privileges );
BOOL result = FALSE;
mapping.GenericRead = FILE_GENERIC_READ;
mapping.GenericWrite = FILE_GENERIC_WRITE;
mapping.GenericExecute = FILE_GENERIC_EXECUTE;
mapping.GenericAll = FILE_ALL_ACCESS;
::MapGenericMask( &genericAccessRights, &mapping );
if (::AccessCheck( security, hImpersonatedToken, genericAccessRights,
&mapping, &privileges, &privilegesLength, &grantedAccess, &result )) {
bRet = (result == TRUE);
}
::CloseHandle( hImpersonatedToken );
}
::CloseHandle( hToken );
}
::free( security );
}
}
return bRet;
} |
|
Date |
User |
Action |
Args |
2019-07-01 21:12:06 | earonesty | set | recipients:
+ earonesty, georg.brandl, paul.moore, ncoghlan, rupole, tim.golden, python-dev, takluyver, zach.ware, serhiy.storchaka, eryksun, steve.dower, rocco.matano, Billy McCulloch, Paul Doom, JDM |
2019-07-01 21:12:06 | earonesty | set | messageid: <1562015526.25.0.42771094802.issue22107@roundup.psfhosted.org> |
2019-07-01 21:12:06 | earonesty | link | issue22107 messages |
2019-07-01 21:12:06 | earonesty | create | |
|