misc/libphysfs/lzma/CPP/Windows/MemoryLock.cpp
author nemo
Mon, 10 Apr 2017 12:06:43 -0400
changeset 12213 bb5522e88ab2
permissions -rw-r--r--
bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
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// Common/MemoryLock.cpp
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#include "StdAfx.h"
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namespace NWindows {
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namespace NSecurity {
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#ifndef _UNICODE
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typedef BOOL (WINAPI * OpenProcessTokenP)(HANDLE ProcessHandle, DWORD DesiredAccess, PHANDLE TokenHandle);
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typedef BOOL (WINAPI * LookupPrivilegeValueP)(LPCTSTR lpSystemName, LPCTSTR lpName, PLUID  lpLuid);
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typedef BOOL (WINAPI * AdjustTokenPrivilegesP)(HANDLE TokenHandle, BOOL DisableAllPrivileges,
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    PTOKEN_PRIVILEGES NewState, DWORD BufferLength, PTOKEN_PRIVILEGES PreviousState,PDWORD ReturnLength);
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#endif
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#ifdef _UNICODE
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bool EnableLockMemoryPrivilege(
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#else
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static bool EnableLockMemoryPrivilege2(HMODULE hModule,
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#endif
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bool enable)
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{
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  #ifndef _UNICODE
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  if (hModule == NULL)
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    return false;
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  OpenProcessTokenP openProcessToken = (OpenProcessTokenP)GetProcAddress(hModule, "OpenProcessToken");
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  LookupPrivilegeValueP lookupPrivilegeValue = (LookupPrivilegeValueP)GetProcAddress(hModule, "LookupPrivilegeValueA" );
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  AdjustTokenPrivilegesP adjustTokenPrivileges = (AdjustTokenPrivilegesP)GetProcAddress(hModule, "AdjustTokenPrivileges");
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  if (openProcessToken == NULL || adjustTokenPrivileges == NULL || lookupPrivilegeValue == NULL)
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    return false;
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  #endif
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  HANDLE token;
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  if (!
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    #ifdef _UNICODE
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    ::OpenProcessToken
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    #else
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    openProcessToken
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    #endif
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    (::GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &token))
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    return false;
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  TOKEN_PRIVILEGES tp;
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  bool res = false;
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  if (
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    #ifdef _UNICODE
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    ::LookupPrivilegeValue
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    #else
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    lookupPrivilegeValue
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    #endif
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    (NULL, SE_LOCK_MEMORY_NAME, &(tp.Privileges[0].Luid)))
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  {
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    tp.PrivilegeCount = 1;
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    tp.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED: 0;
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    if (
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      #ifdef _UNICODE
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      ::AdjustTokenPrivileges
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      #else
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      adjustTokenPrivileges
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      #endif
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      (token, FALSE, &tp, 0, NULL, NULL))
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      res = (GetLastError() == ERROR_SUCCESS);
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  }
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  ::CloseHandle(token);
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  return res;
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}
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#ifndef _UNICODE
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bool EnableLockMemoryPrivilege(bool enable)
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{
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  HMODULE hModule = LoadLibrary(TEXT("Advapi32.dll"));
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  if(hModule == NULL)
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    return false;
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  bool res = EnableLockMemoryPrivilege2(hModule, enable);
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  ::FreeLibrary(hModule);
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  return res;
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    75
}
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    76
#endif
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    77
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    78
}}