+++ /dev/null
-/* $Id$
- *
- * COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS system libraries
- * FILE: lib/kernel32/file/dosdev.c
- * PURPOSE: Dos device functions
- * PROGRAMMER: Ariadne ( ariadne@xs4all.nl)
- * UPDATE HISTORY:
- * Created 01/11/98
- */
-
-/* INCLUDES ******************************************************************/
-
-#include <k32.h>
-
-#define NDEBUG
-#include "../include/debug.h"
-
-
-/* FUNCTIONS *****************************************************************/
-
-/*
- * @implemented
- */
-BOOL
-STDCALL
-DefineDosDeviceA(
- DWORD dwFlags,
- LPCSTR lpDeviceName,
- LPCSTR lpTargetPath
- )
-{
- UNICODE_STRING DeviceNameU;
- UNICODE_STRING TargetPathU;
- BOOL Result;
-
- if (!RtlCreateUnicodeStringFromAsciiz (&DeviceNameU,
- (LPSTR)lpDeviceName))
- {
- SetLastError (ERROR_NOT_ENOUGH_MEMORY);
- return 0;
- }
-
- if (!RtlCreateUnicodeStringFromAsciiz (&TargetPathU,
- (LPSTR)lpTargetPath))
- {
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- DeviceNameU.Buffer);
- SetLastError (ERROR_NOT_ENOUGH_MEMORY);
- return 0;
- }
-
- Result = DefineDosDeviceW (dwFlags,
- DeviceNameU.Buffer,
- TargetPathU.Buffer);
-
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- TargetPathU.Buffer);
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- DeviceNameU.Buffer);
-
- return Result;
-}
-
-
-/*
- * @unimplemented
- */
-BOOL
-STDCALL
-DefineDosDeviceW(
- DWORD dwFlags,
- LPCWSTR lpDeviceName,
- LPCWSTR lpTargetPath
- )
-{
- return FALSE;
-}
-
-
-/*
- * @implemented
- */
-DWORD
-STDCALL
-QueryDosDeviceA(
- LPCSTR lpDeviceName,
- LPSTR lpTargetPath,
- DWORD ucchMax
- )
-{
- UNICODE_STRING DeviceNameU;
- UNICODE_STRING TargetPathU;
- ANSI_STRING TargetPathA;
- DWORD Length;
- DWORD CurrentLength;
- PWCHAR Buffer;
-
- if (lpDeviceName)
- {
- if (!RtlCreateUnicodeStringFromAsciiz (&DeviceNameU,
- (LPSTR)lpDeviceName))
- {
- SetLastError (ERROR_NOT_ENOUGH_MEMORY);
- return 0;
- }
- }
- Buffer = RtlAllocateHeap (RtlGetProcessHeap (),
- 0,
- ucchMax * sizeof(WCHAR));
- if (Buffer == NULL)
- {
- if (lpDeviceName)
- {
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- DeviceNameU.Buffer);
- }
- SetLastError (ERROR_NOT_ENOUGH_MEMORY);
- return 0;
- }
-
- Length = QueryDosDeviceW (lpDeviceName ? DeviceNameU.Buffer : NULL,
- Buffer,
- ucchMax);
- if (Length != 0)
- {
- TargetPathA.Buffer = lpTargetPath;
- TargetPathU.Buffer = Buffer;
- ucchMax = Length;
-
- while (ucchMax)
- {
- CurrentLength = min (ucchMax, MAXUSHORT / 2);
- TargetPathU.MaximumLength = TargetPathU.Length = CurrentLength * sizeof(WCHAR);
-
- TargetPathA.Length = 0;
- TargetPathA.MaximumLength = CurrentLength;
-
- RtlUnicodeStringToAnsiString (&TargetPathA,
- &TargetPathU,
- FALSE);
- ucchMax -= CurrentLength;
- TargetPathA.Buffer += TargetPathA.Length;
- TargetPathU.Buffer += TargetPathU.Length / sizeof(WCHAR);
- }
- }
-
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- Buffer);
- if (lpDeviceName)
- {
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- DeviceNameU.Buffer);
- }
- return Length;
-}
-
-
-/*
- * @implemented
- */
-DWORD
-STDCALL
-QueryDosDeviceW(
- LPCWSTR lpDeviceName,
- LPWSTR lpTargetPath,
- DWORD ucchMax
- )
-{
- POBJECT_DIRECTORY_INFORMATION DirInfo;
- OBJECT_ATTRIBUTES ObjectAttributes;
- UNICODE_STRING UnicodeString;
- HANDLE DirectoryHandle;
- HANDLE DeviceHandle;
- ULONG ReturnLength;
- ULONG NameLength;
- ULONG Length;
- ULONG Context;
- BOOLEAN RestartScan;
- NTSTATUS Status;
- UCHAR Buffer[512];
- PWSTR Ptr;
-
- /* Open the '\??' directory */
- RtlInitUnicodeString (&UnicodeString,
- L"\\??");
- InitializeObjectAttributes (&ObjectAttributes,
- &UnicodeString,
- OBJ_CASE_INSENSITIVE,
- NULL,
- NULL);
- Status = NtOpenDirectoryObject (&DirectoryHandle,
- DIRECTORY_QUERY,
- &ObjectAttributes);
- if (!NT_SUCCESS (Status))
- {
- DPRINT ("NtOpenDirectoryObject() failed (Status %lx)\n", Status);
- SetLastErrorByStatus (Status);
- return 0;
- }
-
- Length = 0;
-
- if (lpDeviceName != NULL)
- {
- /* Open the lpDeviceName link object */
- RtlInitUnicodeString (&UnicodeString,
- (PWSTR)lpDeviceName);
- InitializeObjectAttributes (&ObjectAttributes,
- &UnicodeString,
- OBJ_CASE_INSENSITIVE,
- DirectoryHandle,
- NULL);
- Status = NtOpenSymbolicLinkObject (&DeviceHandle,
- SYMBOLIC_LINK_QUERY,
- &ObjectAttributes);
- if (!NT_SUCCESS (Status))
- {
- DPRINT ("NtOpenSymbolicLinkObject() failed (Status %lx)\n", Status);
- NtClose (DirectoryHandle);
- SetLastErrorByStatus (Status);
- return 0;
- }
-
- /* Query link target */
- UnicodeString.Length = 0;
- UnicodeString.MaximumLength = (USHORT)ucchMax * sizeof(WCHAR);
- UnicodeString.Buffer = lpTargetPath;
-
- ReturnLength = 0;
- Status = NtQuerySymbolicLinkObject (DeviceHandle,
- &UnicodeString,
- &ReturnLength);
- NtClose (DeviceHandle);
- NtClose (DirectoryHandle);
- if (!NT_SUCCESS (Status))
- {
- DPRINT ("NtQuerySymbolicLinkObject() failed (Status %lx)\n", Status);
- SetLastErrorByStatus (Status);
- return 0;
- }
-
- DPRINT ("ReturnLength: %lu\n", ReturnLength);
- DPRINT ("TargetLength: %hu\n", UnicodeString.Length);
- DPRINT ("Target: '%wZ'\n", &UnicodeString);
-
- Length = ReturnLength / sizeof(WCHAR);
- if (Length < ucchMax)
- {
- /* Append null-charcter */
- lpTargetPath[Length] = UNICODE_NULL;
- Length++;
- }
- else
- {
- DPRINT ("Buffer is too small\n");
- SetLastErrorByStatus (STATUS_BUFFER_TOO_SMALL);
- return 0;
- }
- }
- else
- {
- RestartScan = TRUE;
- Context = 0;
- Ptr = lpTargetPath;
- DirInfo = (POBJECT_DIRECTORY_INFORMATION)Buffer;
-
- while (TRUE)
- {
- Status = NtQueryDirectoryObject (DirectoryHandle,
- Buffer,
- sizeof (Buffer),
- TRUE,
- RestartScan,
- &Context,
- &ReturnLength);
- if (!NT_SUCCESS(Status))
- {
- if (Status == STATUS_NO_MORE_ENTRIES)
- {
- /* Terminate the buffer */
- *Ptr = UNICODE_NULL;
- Length++;
-
- Status = STATUS_SUCCESS;
- }
- else
- {
- Length = 0;
- }
- SetLastErrorByStatus (Status);
- break;
- }
-
- if (!wcscmp (DirInfo->ObjectTypeName.Buffer, L"SymbolicLink"))
- {
- DPRINT ("Name: '%wZ'\n", &DirInfo->ObjectName);
-
- NameLength = DirInfo->ObjectName.Length / sizeof(WCHAR);
- if (Length + NameLength + 1 >= ucchMax)
- {
- Length = 0;
- SetLastErrorByStatus (STATUS_BUFFER_TOO_SMALL);
- break;
- }
-
- memcpy (Ptr,
- DirInfo->ObjectName.Buffer,
- DirInfo->ObjectName.Length);
- Ptr += NameLength;
- Length += NameLength;
- *Ptr = UNICODE_NULL;
- Ptr++;
- Length++;
- }
-
- RestartScan = FALSE;
- }
-
- NtClose (DirectoryHandle);
- }
-
- return Length;
-}
-
-/* EOF */
projects / reactos.git / blobdiff