570 lines
16 KiB
C
570 lines
16 KiB
C
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/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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devmap.c
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Abstract:
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Program to launch a command with a different device mapping.
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Author:
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02-Oct-1996 Steve Wood (stevewo)
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Revision History:
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--*/
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <windows.h>
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UCHAR DeviceNames[ 4096 ];
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UCHAR TargetPath[ 4096 ];
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typedef struct _DEVICE_LINK {
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PCHAR LinkName;
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ULONG LinkTargetLength;
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PCHAR LinkTarget;
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BOOL ProtectedDevice;
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BOOL RemoveDevice;
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} DEVICE_LINK, *PDEVICE_LINK;
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ULONG NumberOfDriveLetters;
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ULONG NumberOfDevices;
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DEVICE_LINK DriveLetters[ 128 ];
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DEVICE_LINK Devices[ 128 ];
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BOOLEAN CreatePermanentPrivilegeEnabled;
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BOOLEAN CreatePermanentPrivilegeWasEnabled;
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BOOLEAN
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EnableCreatePermanentPrivilege( void )
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{
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NTSTATUS Status;
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//
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// Try to enable create permanent privilege
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//
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Status = RtlAdjustPrivilege( SE_CREATE_PERMANENT_PRIVILEGE,
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TRUE, // Enable
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FALSE, // Not impersonating
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&CreatePermanentPrivilegeWasEnabled // previous state
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);
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if (!NT_SUCCESS( Status )) {
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return FALSE;
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}
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CreatePermanentPrivilegeEnabled = TRUE;
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return TRUE;
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}
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void
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DisableCreatePermanentPrivilege( void )
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{
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//
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// Restore privileges to what they were
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//
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RtlAdjustPrivilege( SE_CREATE_PERMANENT_PRIVILEGE,
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CreatePermanentPrivilegeWasEnabled,
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FALSE,
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&CreatePermanentPrivilegeWasEnabled
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);
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CreatePermanentPrivilegeEnabled = FALSE;
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return;
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}
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void
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Usage( void )
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{
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fprintf( stderr, "usage: DEVMAP [-R]\n" );
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fprintf( stderr, " [-r \"device list\"]\n" );
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fprintf( stderr, " [-a \"device list\"]\n" );
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fprintf( stderr, " command line...\n" );
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fprintf( stderr, "where: -R - removes all device definitions\n" );
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fprintf( stderr, " -r - removes specified device definitions\n" );
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fprintf( stderr, " -a - adds specified device definitions\n" );
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fprintf( stderr, " \"device list\" - is a list of one or more blank separated\n" );
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fprintf( stderr, " defintions of the form name[=target]\n" );
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fprintf( stderr, " If target is not specified for -a then\n" );
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fprintf( stderr, " uses the target in effect when DEVMAP\n" );
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fprintf( stderr, "\n" );
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fprintf( stderr, "Examples:\n" );
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fprintf( stderr, "\n" );
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fprintf( stderr, " DEVMAP -R -a \"C: D: NUL\" CMD.EXE\n" );
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fprintf( stderr, " DEVMAP -r \"UNC\" CMD.EXE\n" );
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fprintf( stderr, " DEVMAP -a \"COM1=\\Device\\Serial8\" CMD.EXE\n" );
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exit( 1 );
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}
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void
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DisplayDeviceTarget(
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char *Msg,
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char *Name,
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char *Target,
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DWORD cchTarget
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);
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void
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DisplayDeviceTarget(
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char *Msg,
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char *Name,
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char *Target,
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DWORD cchTarget
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)
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{
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char *s;
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printf( "%s%s = ", Msg, Name );
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s = Target;
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while (*s && cchTarget != 0) {
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if (s > Target) {
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printf( " ; " );
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}
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printf( "%s", s );
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while (*s++) {
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if (!cchTarget--) {
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cchTarget = 0;
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break;
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}
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}
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}
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}
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PDEVICE_LINK
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FindDevice(
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LPSTR Name,
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BOOL fAdd
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)
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{
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DWORD i;
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LPSTR NewTarget;
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PDEVICE_LINK p;
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if (fAdd) {
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NewTarget = strchr( Name, '=' );
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if (NewTarget != NULL) {
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*NewTarget++ = '\0';
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}
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}
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for (i=0; i<NumberOfDriveLetters; i++) {
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p = &DriveLetters[ i ];
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if (!_stricmp( p->LinkName, Name )) {
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if (fAdd && NewTarget) {
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p->LinkTargetLength = strlen( NewTarget ) + 2;
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p->LinkTarget = calloc( 1, p->LinkTargetLength );
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if (!p->LinkTarget) {
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return NULL;
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}
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strcpy( p->LinkTarget, NewTarget );
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}
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return p;
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}
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}
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for (i=0; i<NumberOfDevices; i++) {
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p = &Devices[ i ];
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if (!_stricmp( p->LinkName, Name )) {
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if (fAdd && NewTarget) {
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p->LinkTargetLength = strlen( NewTarget ) + 2;
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p->LinkTarget = calloc( 1, p->LinkTargetLength );
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if (!p->LinkTarget) {
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return NULL;
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}
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strcpy( p->LinkTarget, NewTarget );
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}
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return p;
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}
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}
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if (fAdd) {
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if (NewTarget != NULL) {
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if (strlen( Name ) == 2 && Name[1] == ':') {
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p = &DriveLetters[ NumberOfDriveLetters++ ];
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}
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else {
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p = &Devices[ NumberOfDevices++ ];
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}
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p->LinkName = Name;
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p->LinkTargetLength = strlen( NewTarget ) + 2;
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p->LinkTarget = calloc( 1, p->LinkTargetLength );
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if (!p->LinkTarget) {
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return NULL;
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}
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strcpy( p->LinkTarget, NewTarget );
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}
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else {
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fprintf( stderr, "DEVMAP: Unable to add '%s' device name without target.\n", Name );
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}
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}
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else {
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fprintf( stderr, "DEVMAP: Unable to remove '%s' device name.\n", Name );
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}
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return NULL;
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}
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BOOL
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CreateSymbolicLink(
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HANDLE DirectoryHandle,
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LPSTR Name,
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LPSTR Target,
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DWORD cchTarget,
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BOOL fVerbose
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)
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{
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NTSTATUS Status;
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ANSI_STRING AnsiString;
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UNICODE_STRING LinkName, LinkTarget;
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OBJECT_ATTRIBUTES ObjectAttributes;
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HANDLE LinkHandle;
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RtlInitAnsiString( &AnsiString, Name );
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RtlAnsiStringToUnicodeString( &LinkName, &AnsiString, TRUE );
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AnsiString.Buffer = Target;
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AnsiString.Length = (USHORT)cchTarget - 2;
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AnsiString.MaximumLength = (USHORT)(cchTarget - 1);
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RtlAnsiStringToUnicodeString( &LinkTarget, &AnsiString, TRUE );
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InitializeObjectAttributes( &ObjectAttributes,
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&LinkName,
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CreatePermanentPrivilegeEnabled ? OBJ_PERMANENT : 0,
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DirectoryHandle,
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NULL
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);
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Status = NtCreateSymbolicLinkObject( &LinkHandle,
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SYMBOLIC_LINK_ALL_ACCESS,
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&ObjectAttributes,
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&LinkTarget
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);
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if (NT_SUCCESS( Status )) {
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if (CreatePermanentPrivilegeEnabled) {
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NtClose( LinkHandle );
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}
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return TRUE;
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}
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else {
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if (fVerbose) {
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printf( " (*** FAILED %x ***)", Status );
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}
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return FALSE;
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}
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}
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int
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__cdecl
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CompareDeviceLink(
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void const *p1,
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void const *p2
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)
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{
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return _stricmp( ((PDEVICE_LINK)p1)->LinkName, ((PDEVICE_LINK)p2)->LinkName );
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}
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int
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__cdecl
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main(
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int argc,
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char *argv[]
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)
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{
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DWORD cch, i;
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char c, *s;
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BOOL fVerbose;
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BOOL fRemoveAllDevices;
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LPSTR lpCommandLine;
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LPSTR lpRemoveDevices;
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LPSTR lpAddDevices;
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PDEVICE_LINK p;
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char szWindowsDirectory[ MAX_PATH ] = {0};
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char chWindowsDrive;
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STARTUPINFO StartupInfo;
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PROCESS_INFORMATION ProcessInfo;
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NTSTATUS Status;
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HANDLE DirectoryHandle;
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PROCESS_DEVICEMAP_INFORMATION ProcessDeviceMapInfo;
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if (!GetWindowsDirectory( szWindowsDirectory, sizeof( szWindowsDirectory ) )) {
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return 1;
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}
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chWindowsDrive = (char) toupper( szWindowsDirectory[ 0 ] );
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fVerbose = FALSE;
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fRemoveAllDevices = FALSE;
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lpCommandLine = NULL;
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lpRemoveDevices = NULL;
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lpAddDevices = NULL;
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while (--argc) {
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s = *++argv;
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if (*s == '-' || *s == '/') {
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while (c = *++s) {
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switch (tolower( c )) {
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case '?':
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case 'h':
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Usage();
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case 'v':
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fVerbose = TRUE;
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break;
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case 'r':
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if (c == 'R') {
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fRemoveAllDevices = TRUE;
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}
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else
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if (--argc) {
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lpRemoveDevices = *++argv;
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}
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else {
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fprintf( stderr, "DEVMAP: missing parameter to -r switch\n" );
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Usage();
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}
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break;
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case 'a':
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if (--argc) {
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lpAddDevices = *++argv;
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}
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else {
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fprintf( stderr, "DEVMAP: missing parameter to -r switch\n" );
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Usage();
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}
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break;
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}
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}
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}
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else
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if (lpCommandLine == NULL) {
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lpCommandLine = s;
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break;
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}
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else {
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Usage();
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}
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}
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if (lpCommandLine != NULL) {
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lpCommandLine = strstr( GetCommandLine(), lpCommandLine );
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}
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if (lpCommandLine == NULL) {
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lpCommandLine = "CMD.EXE";
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}
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cch = QueryDosDevice( NULL,
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DeviceNames,
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sizeof( DeviceNames )
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);
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if (cch == 0) {
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fprintf( stderr, "DOSDEV: Unable to query device names - %u\n", GetLastError() );
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exit( 1 );
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}
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s = DeviceNames;
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while (*s) {
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cch = QueryDosDevice( s,
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TargetPath,
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sizeof( TargetPath )
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);
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if (cch == 0) {
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sprintf( TargetPath, "*** unable to query target path - %u ***", GetLastError() );
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}
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else {
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if (strlen( s ) == 2 && s[1] == ':') {
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p = &DriveLetters[ NumberOfDriveLetters++ ];
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if (chWindowsDrive == toupper( *s )) {
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p->ProtectedDevice = TRUE;
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}
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}
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else {
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p = &Devices[ NumberOfDevices++ ];
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}
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p->LinkName = s;
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p->LinkTargetLength = cch;
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p->LinkTarget = malloc( cch );
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if (!p->LinkTarget) {
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return 1;
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}
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memmove( p->LinkTarget, TargetPath, cch );
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}
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while (*s++)
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;
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}
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qsort( DriveLetters,
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NumberOfDriveLetters,
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sizeof( DEVICE_LINK ),
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CompareDeviceLink
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);
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|
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qsort( Devices,
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NumberOfDevices,
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sizeof( DEVICE_LINK ),
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CompareDeviceLink
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||
|
|
);
|
||
|
|
|
||
|
|
if (fVerbose) {
|
||
|
|
printf( "Existing Device Names\n" );
|
||
|
|
|
||
|
|
for (i=0; i<NumberOfDriveLetters; i++) {
|
||
|
|
p = &DriveLetters[ i ];
|
||
|
|
DisplayDeviceTarget( " ", p->LinkName, p->LinkTarget, p->LinkTargetLength );
|
||
|
|
printf( "\n" );
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i=0; i<NumberOfDevices; i++) {
|
||
|
|
p = &Devices[ i ];
|
||
|
|
DisplayDeviceTarget( " ", p->LinkName, p->LinkTarget, p->LinkTargetLength );
|
||
|
|
printf( "\n" );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fRemoveAllDevices) {
|
||
|
|
for (i=0; i<NumberOfDriveLetters; i++) {
|
||
|
|
DriveLetters[ i ].RemoveDevice = TRUE;
|
||
|
|
}
|
||
|
|
for (i=0; i<NumberOfDevices; i++) {
|
||
|
|
Devices[ i ].RemoveDevice = TRUE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
while (s = lpRemoveDevices) {
|
||
|
|
while (*s && *s != ' ') {
|
||
|
|
s++;
|
||
|
|
}
|
||
|
|
c = *s;
|
||
|
|
*s++ = '\0';
|
||
|
|
if (p = FindDevice( lpRemoveDevices, FALSE )) {
|
||
|
|
p->RemoveDevice = TRUE;
|
||
|
|
}
|
||
|
|
if (c) {
|
||
|
|
lpRemoveDevices = s;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
lpRemoveDevices = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
while (s = lpAddDevices) {
|
||
|
|
while (*s && *s != ' ') {
|
||
|
|
s++;
|
||
|
|
}
|
||
|
|
c = *s;
|
||
|
|
*s++ = '\0';
|
||
|
|
if (p = FindDevice( lpAddDevices, TRUE )) {
|
||
|
|
p->RemoveDevice = FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (c) {
|
||
|
|
lpAddDevices = s;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
lpAddDevices = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fVerbose) {
|
||
|
|
printf( "Launching '%s' with following Device Names\n", lpCommandLine );
|
||
|
|
}
|
||
|
|
memset( &StartupInfo, 0, sizeof( StartupInfo ) );
|
||
|
|
StartupInfo.cb = sizeof( StartupInfo );
|
||
|
|
if (!CreateProcess( NULL,
|
||
|
|
lpCommandLine,
|
||
|
|
NULL,
|
||
|
|
NULL,
|
||
|
|
TRUE,
|
||
|
|
CREATE_SUSPENDED,
|
||
|
|
NULL,
|
||
|
|
NULL,
|
||
|
|
&StartupInfo,
|
||
|
|
&ProcessInfo
|
||
|
|
)
|
||
|
|
) {
|
||
|
|
fprintf( stderr, "DEVMAP: CreateProcess failed - %u\n", GetLastError() );
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = NtCreateDirectoryObject( &DirectoryHandle,
|
||
|
|
DIRECTORY_ALL_ACCESS,
|
||
|
|
NULL
|
||
|
|
);
|
||
|
|
if (!NT_SUCCESS( Status )) {
|
||
|
|
fprintf( stderr, "DEVMAP: NtCreateDirectoryObject failed - %x\n", Status );
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
ProcessDeviceMapInfo.Set.DirectoryHandle = DirectoryHandle;
|
||
|
|
Status = NtSetInformationProcess( ProcessInfo.hProcess,
|
||
|
|
ProcessDeviceMap,
|
||
|
|
&ProcessDeviceMapInfo.Set,
|
||
|
|
sizeof( ProcessDeviceMapInfo.Set )
|
||
|
|
);
|
||
|
|
if (!NT_SUCCESS( Status )) {
|
||
|
|
fprintf( stderr, "DEVMAP: Set ProcessDeviceMap failed - %x\n", Status );
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
EnableCreatePermanentPrivilege();
|
||
|
|
for (i=0; i<NumberOfDriveLetters; i++) {
|
||
|
|
p = &DriveLetters[ i ];
|
||
|
|
if (!p->RemoveDevice || p->ProtectedDevice) {
|
||
|
|
if (fVerbose) {
|
||
|
|
DisplayDeviceTarget( " ", p->LinkName, p->LinkTarget, p->LinkTargetLength );
|
||
|
|
if (p->RemoveDevice && p->ProtectedDevice) {
|
||
|
|
printf( " (*** may not remove boot device)" );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
CreateSymbolicLink( DirectoryHandle,
|
||
|
|
p->LinkName,
|
||
|
|
p->LinkTarget,
|
||
|
|
p->LinkTargetLength,
|
||
|
|
fVerbose
|
||
|
|
);
|
||
|
|
if (fVerbose) {
|
||
|
|
printf( "\n" );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i=0; i<NumberOfDevices; i++) {
|
||
|
|
p = &Devices[ i ];
|
||
|
|
if (!p->RemoveDevice || p->ProtectedDevice) {
|
||
|
|
if (fVerbose) {
|
||
|
|
DisplayDeviceTarget( " ", p->LinkName, p->LinkTarget, p->LinkTargetLength );
|
||
|
|
}
|
||
|
|
CreateSymbolicLink( DirectoryHandle,
|
||
|
|
p->LinkName,
|
||
|
|
p->LinkTarget,
|
||
|
|
p->LinkTargetLength,
|
||
|
|
fVerbose
|
||
|
|
);
|
||
|
|
if (fVerbose) {
|
||
|
|
printf( "\n" );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
DisableCreatePermanentPrivilege();
|
||
|
|
NtClose( DirectoryHandle );
|
||
|
|
|
||
|
|
ResumeThread( ProcessInfo.hThread );
|
||
|
|
WaitForSingleObject( ProcessInfo.hProcess, 0xffffffff );
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|