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130 lines
2.7 KiB
130 lines
2.7 KiB
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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FailOpenFile.cpp
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Abstract:
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Force OpenFile to fail for the specified files.
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History:
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01/31/2001 robkenny created
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03/13/2001 robkenny Converted to CString
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02/07/2002 astritz Converted to StrSafe
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--*/
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#include "precomp.h"
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#include "charvector.h"
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IMPLEMENT_SHIM_BEGIN(FailOpenFile)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(OpenFile)
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APIHOOK_ENUM_END
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CharVector * g_FailList = NULL;
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HFILE
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APIHOOK(OpenFile)(
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LPCSTR lpFileName, // file name
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LPOFSTRUCT lpReOpenBuff, // file information
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UINT uStyle // action and attributes
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)
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{
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int i;
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for (i = 0; i < g_FailList->Size(); ++i)
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{
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// Compare each fail name against the end of lpFileName
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const char * failName = g_FailList->Get(i);
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size_t failNameLen = strlen(failName);
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size_t fileNameLen = strlen(lpFileName);
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if (fileNameLen >= failNameLen)
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{
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if (_strnicmp(failName, lpFileName+fileNameLen-failNameLen, failNameLen) == 0)
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{
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// Force OpenFile to fail for this filename
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DPFN( eDbgLevelError, "Forcing OpenFile(%s) to fail", lpFileName);
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return FALSE;
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}
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}
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}
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HFILE returnValue = ORIGINAL_API(OpenFile)(lpFileName, lpReOpenBuff, uStyle);
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return returnValue;
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}
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/*++
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Parse the command line, push each filename onto the end of the g_FailList.
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--*/
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BOOL ParseCommandLine(const char * cl)
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{
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g_FailList = new CharVector;
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if (!g_FailList)
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{
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return FALSE;
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}
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if (cl != NULL && *cl)
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{
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int argc = 0;
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LPSTR * argv = _CommandLineToArgvA(cl, & argc);
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if (argv)
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{
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for (int i = 0; i < argc; ++i)
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{
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if (!g_FailList->Append(argv[i]))
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{
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// Memory failure
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delete g_FailList;
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g_FailList = NULL;
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break;
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}
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DPFN( eDbgLevelSpew, "Adding %s to fail list", argv[i]);
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}
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LocalFree(argv);
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}
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}
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return g_FailList != NULL;
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}
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/*++
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Handle attach and detach
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--*/
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BOOL
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NOTIFY_FUNCTION(DWORD fdwReason)
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{
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if (fdwReason == DLL_PROCESS_ATTACH)
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{
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return ParseCommandLine(COMMAND_LINE);
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}
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return TRUE;
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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CALL_NOTIFY_FUNCTION
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APIHOOK_ENTRY(KERNEL32.DLL, OpenFile)
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HOOK_END
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IMPLEMENT_SHIM_END
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