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Try OpenFileMapping in PAGE_READONLY mode because of SeCreateGlobalPrivilege (https://github.com/pocoproject/poco/issues/493)

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This commit is contained in:
Markus Kolb 2014-07-11 14:57:05 +02:00
parent 32d4c1eb07
commit 37691144df
1 changed files with 25 additions and 3 deletions
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28
Foundation/src/SharedMemory_WIN32.cpp
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@ -15,8 +15,10 @@
#include "Poco/SharedMemory_WIN32.h" #include "Poco/SharedMemory_WIN32.h"
#include "Poco/Error.h"
#include "Poco/Exception.h" #include "Poco/Exception.h"
#include "Poco/File.h" #include "Poco/File.h"
#include "Poco/Format.h"
#if defined (POCO_WIN32_UTF8) #if defined (POCO_WIN32_UTF8)
#include "Poco/UnicodeConverter.h" #include "Poco/UnicodeConverter.h"
#endif #endif
@ -46,7 +48,23 @@ SharedMemoryImpl::SharedMemoryImpl(const std::string& name, std::size_t size, Sh
#endif #endif
if (!_memHandle) if (!_memHandle)
throw SystemException("Cannot create shared memory object", _name); {
DWORD dwRetVal = GetLastError();
if (_mode != PAGE_READONLY || dwRetVal != 5)
throw SystemException(format("Cannot create shared memory object %s [Error %d: %s]", _name, (int)dwRetVal, Error::getMessage(dwRetVal)));
#if defined (POCO_WIN32_UTF8)
_memHandle = OpenFileMappingW(PAGE_READONLY, FALSE, utf16name.c_str());
#else
_memHandle = OpenFileMappingA(PAGE_READONLY, FALSE, _name.c_str());
#endif
if (!_memHandle)
{
dwRetVal = GetLastError();
throw SystemException(format("Cannot open shared memory object %s [Error %d: %s]", _name, (int)dwRetVal, Error::getMessage(dwRetVal)));
}
}
map(); map();
} }
@ -88,9 +106,10 @@ SharedMemoryImpl::SharedMemoryImpl(const Poco::File& file, SharedMemory::AccessM
_memHandle = CreateFileMapping(_fileHandle, NULL, _mode, 0, 0, NULL); _memHandle = CreateFileMapping(_fileHandle, NULL, _mode, 0, 0, NULL);
if (!_memHandle) if (!_memHandle)
{ {
DWORD dwRetVal = GetLastError();
CloseHandle(_fileHandle); CloseHandle(_fileHandle);
_fileHandle = INVALID_HANDLE_VALUE; _fileHandle = INVALID_HANDLE_VALUE;
throw SystemException("Cannot map file into shared memory", _name); throw SystemException(format("Cannot map file into shared memory %s [Error %d: %s]", _name, (int)dwRetVal, Error::getMessage(dwRetVal)));
} }
map(); map();
} }
@ -110,7 +129,10 @@ void SharedMemoryImpl::map()
access = FILE_MAP_WRITE; access = FILE_MAP_WRITE;
LPVOID addr = MapViewOfFile(_memHandle, access, 0, 0, _size); LPVOID addr = MapViewOfFile(_memHandle, access, 0, 0, _size);
if (!addr) if (!addr)
throw SystemException("Cannot map shared memory object", _name); {
DWORD dwRetVal = GetLastError();
throw SystemException(format("Cannot map shared memory object %s [Error %d: %s]", _name, (int)dwRetVal, Error::getMessage(dwRetVal)));
}
_address = static_cast<char*>(addr); _address = static_cast<char*>(addr);
} }