Leaked source code of windows server 2003
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179 lines
3.6 KiB

/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
vrdll.c
Abstract:
Initialization for VdmRedir as DLL
Contents:
VrDllInitialize
Author:
Richard L Firth (rfirth) 11-May-1992
Revision History:
--*/
#if DBG
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#endif
#include <nt.h>
#include <ntrtl.h>
#include <nturtl.h>
#include <windows.h>
#include <vrnmpipe.h>
#include <vrinit.h>
#include "vrdebug.h"
//
// external data
//
//
// external functions
//
extern
VOID
TerminateDlcEmulation(
VOID
);
#if DBG
FILE* hVrDebugLog = NULL;
#endif
BOOLEAN
VrDllInitialize(
IN PVOID DllHandle,
IN ULONG Reason,
IN PCONTEXT Context OPTIONAL
)
/*++
Routine Description:
Gets control as a process or thread attaches/detaches from VdmRedir DLL.
Always returns success
Arguments:
DllHandle -
Reason -
Context -
Return Value:
BOOLEAN
TRUE
--*/
{
BOOL ok = TRUE;
#if DBG
if (Reason == DLL_PROCESS_ATTACH) {
//
// a little run-time diagnostication, madam?
//
LPSTR ptr;
//
// override VrDebugFlags from VR environment variable
//
if (ptr = getenv("VR")) {
if (!_strnicmp(ptr, "0x", 2)) {
ptr += 2;
}
for (VrDebugFlags = 0; isxdigit(*ptr); ++ptr) {
VrDebugFlags = VrDebugFlags * 16
+ (*ptr
- ('0' + ((*ptr <= '9') ? 0
: ((islower(*ptr) ? 'a' : 'A') - ('9' + 1)))));
}
IF_DEBUG(DLL) {
DBGPRINT("Setting VrDebugFlags to %#08x from environment variable (VR)\n", VrDebugFlags);
}
}
IF_DEBUG(TO_FILE) {
if ((hVrDebugLog = fopen(VRDEBUG_FILE, "w+")) == NULL) {
VrDebugFlags &= ~DEBUG_TO_FILE;
} else {
char currentDirectory[256];
int n;
currentDirectory[0] = 0;
if (n = GetCurrentDirectory(sizeof(currentDirectory), currentDirectory)) {
if (currentDirectory[n-1] == '\\') {
currentDirectory[n-1] = 0;
}
}
DbgPrint("Writing debug output to %s\\" VRDEBUG_FILE "\n", currentDirectory);
}
}
IF_DEBUG(DLL) {
DBGPRINT("VrDllInitialize: process %d Attaching\n", GetCurrentProcessId());
}
} else if (Reason == DLL_PROCESS_DETACH) {
IF_DEBUG(DLL) {
DBGPRINT("VrDllInitialize: process %d Detaching\n", GetCurrentProcessId());
}
if (hVrDebugLog) {
fclose(hVrDebugLog);
}
} else {
IF_DEBUG(DLL) {
DBGPRINT("VrDllInitialize: Thread %d.%d %staching\n",
GetCurrentProcessId(),
GetCurrentThreadId(),
(Reason == DLL_THREAD_ATTACH) ? "At" : "De"
);
}
}
#endif
if (Reason == DLL_PROCESS_ATTACH) {
//
// we now perform initialization at load time due to deferred loading
// of VdmRedir.DLL
//
ok = VrInitialize();
} else if (Reason == DLL_PROCESS_DETACH) {
//
// clean up resources
//
VrUninitialize();
TerminateDlcEmulation();
ok = TRUE;
}
//
// basically, nothing to do
//
return (BOOLEAN)ok;
}