196 lines
4.1 KiB
C
196 lines
4.1 KiB
C
/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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Regdkey.c
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Abstract:
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This module contains the server side implementation for the Win32
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Registry API to delete a key. That is:
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- BaseRegDeleteKey
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Author:
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David J. Gilman (davegi) 15-Nov-1991
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Notes:
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See the Notes in Regkey.c.
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--*/
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#include <rpc.h>
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#include "regrpc.h"
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#include "localreg.h"
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#include "regclass.h"
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#include <malloc.h>
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#ifdef LOCAL
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#include "tsappcmp.h"
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#endif
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#ifdef LOCAL
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extern HKEY HKEY_RestrictedSite;
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HKEY MapRestrictedKey(HKEY hKey, UNICODE_STRING *lpSubKey, UNICODE_STRING *NewSubKey);
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#endif
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error_status_t
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BaseRegDeleteKey(
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HKEY hKey,
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PUNICODE_STRING lpSubKey
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)
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/*++
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Routine Description:
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Delete a key.
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Arguments:
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hKey - Supplies a handle to an open key. The lpSubKey pathname
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parameter is relative to this key handle. Any of the predefined
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reserved handles or a previously opened key handle may be used for
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hKey.
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lpSubKey - Supplies the downward key path to the key to delete. May
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NOT be NULL.
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Return Value:
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Returns ERROR_SUCCESS (0) for success; error-code for failure.
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Notes:
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If successful, RegDeleteKey removes the key at the desired location
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from the registration database. The entire key, including all of its
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values, will be removed. The key to be deleted may NOT have children,
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otherwise the call will fail. There must not be any open handles that
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refer to the key to be deleted, otherwise the call will fail. DELETE
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access to the key being deleted is required.
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--*/
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{
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OBJECT_ATTRIBUTES Obja;
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NTSTATUS Status;
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NTSTATUS StatusCheck;
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HKEY KeyHandle;
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BOOL fSafeToDelete;
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ASSERT( IsPredefinedRegistryHandle( hKey ) == FALSE );
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// Impersonate the client.
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RPC_IMPERSONATE_CLIENT( NULL );
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// Subtract the NULL from the string length. This was added
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// by the client so that RPC would transmit the whole thing.
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lpSubKey->Length -= sizeof( UNICODE_NULL );
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#ifdef LOCAL
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// see if this key is a special key in HKCR
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if (REG_CLASS_IS_SPECIAL_KEY(hKey)) {
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// if this is a class registration, we call a special routine
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// to open this key
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Status = BaseRegOpenClassKey(
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hKey,
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lpSubKey,
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0,
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MAXIMUM_ALLOWED,
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&KeyHandle);
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if (!NT_SUCCESS(Status)) {
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goto cleanup;
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}
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} else
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#endif // LOCAL
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{
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// Initialize the OBJECT_ATTRIBUTES structure and open the sub key
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// so that it can then be deleted.
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InitializeObjectAttributes(&Obja, lpSubKey, OBJ_CASE_INSENSITIVE, hKey, NULL);
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Status = NtOpenKey(&KeyHandle, DELETE, &Obja);
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}
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// local-only check for restricted
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#ifdef LOCAL
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if (!NT_SUCCESS(Status) && HKEY_RestrictedSite)
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{
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UNICODE_STRING NewSubKey;
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HANDLE MappedKey;
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MappedKey = MapRestrictedKey(hKey, lpSubKey, &NewSubKey);
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if (NULL != MappedKey)
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{
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NTSTATUS Status2;
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InitializeObjectAttributes(&Obja, &NewSubKey, OBJ_CASE_INSENSITIVE, MappedKey, NULL);
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Status2 = NtOpenKey(&KeyHandle, DELETE, &Obja);
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RtlFreeUnicodeString(&NewSubKey);
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NtClose(MappedKey);
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Status = (NT_SUCCESS(Status2) || STATUS_OBJECT_NAME_NOT_FOUND == Status) ? Status2 : Status;
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}
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}
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#ifdef LOCAL
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if (gpfnTermsrvDeleteKey) {
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// Remove the key from the Terminal Server registry tracking database
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gpfnTermsrvDeleteKey(KeyHandle);
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}
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#endif
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#endif // local-only restricted check
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// If for any reason the key could not be opened, return the error.
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if( NT_SUCCESS( Status )) {
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// Call the Nt APIs to delete and close the key.
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Status = NtDeleteKey( KeyHandle );
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StatusCheck = NtClose( KeyHandle );
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ASSERT( NT_SUCCESS( StatusCheck ));
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}
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#ifdef LOCAL
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cleanup:
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#endif
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RPC_REVERT_TO_SELF();
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// Map the NTSTATUS code to a Win32 Registry error code and return.
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return (error_status_t)RtlNtStatusToDosError( Status );
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}
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