602 lines
14 KiB
C
602 lines
14 KiB
C
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/*++
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Copyright (c) 1997 Microsoft Corporation
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All rights reserved
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Module Name:
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devmode.c
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Abstract:
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Handles per-user devmode implementation.
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Author:
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Environment:
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User Mode -Win32
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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#include "local.h"
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#include <offsets.h>
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/********************************************************************
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Forward prototypes
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********************************************************************/
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BOOL
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bGetDevModeLocation(
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IN HKEY hKeyUser, OPTIONAL
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IN LPCWSTR pszPrinter,
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OUT PHKEY phKey,
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OUT LPCWSTR *ppszValue
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);
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const WCHAR gszPrinterConnections[] = L"Printers\\Connections\\";
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const WCHAR gszDevMode[] = L"DevMode";
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const WCHAR gszDevModePerUserLocal[] = L"Printers\\DevModePerUser";
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/********************************************************************
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Private Functions
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********************************************************************/
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DWORD
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RegOpenConnectionKey(
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HKEY hKeyUser,
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LPWSTR pszPrinter,
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PHKEY phKey
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)
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{
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PWCHAR pszPrinterScratch = NULL;
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DWORD dwRetValue = ERROR_SUCCESS;
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DWORD cchSize = MAX_UNC_PRINTER_NAME + PRINTER_NAME_SUFFIX_MAX + COUNTOF( gszPrinterConnections );
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if (pszPrinter &&
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wcslen(pszPrinter) < MAX_UNC_PRINTER_NAME + PRINTER_NAME_SUFFIX_MAX) {
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if (pszPrinterScratch = AllocSplMem(cchSize * sizeof(WCHAR))) {
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wcscpy(pszPrinterScratch, gszPrinterConnections);
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FormatPrinterForRegistryKey(pszPrinter,
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&pszPrinterScratch[ COUNTOF( gszPrinterConnections )-1] );
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dwRetValue = RegOpenKeyEx(hKeyUser,
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pszPrinterScratch,
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0,
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KEY_READ | KEY_WRITE,
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phKey );
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FreeSplMem(pszPrinterScratch);
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} else {
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dwRetValue = GetLastError();
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}
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} else {
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dwRetValue = ERROR_INVALID_PARAMETER;
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}
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return dwRetValue;
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}
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/********************************************************************
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Public functions
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********************************************************************/
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BOOL
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bSetDevModePerUser(
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HANDLE hKeyUser,
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LPCWSTR pszPrinter,
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PDEVMODE pDevMode
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)
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/*++
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Routine Description:
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Sets the per-user DevMode in HKCU.
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Arguments:
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hKeyUser - HKEY_CURRENT_USER handle. OPTIONAL
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pszPrinter - Printer to set.
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pDevMode - DevMode to save. If NULL, deletes value.
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Return Value:
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TRUE - Success
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FALSE - Failure
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--*/
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{
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HKEY hKey = NULL;
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LPWSTR pszValue = NULL;
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DWORD Status;
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if( !pszPrinter ){
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SetLastError( ERROR_INVALID_HANDLE );
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return FALSE;
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}
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//
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// Retrieve the location of the DevMode.
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//
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if( !bGetDevModeLocation( hKeyUser,
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pszPrinter,
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&hKey,
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&pszValue )){
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return FALSE;
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}
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if( !pDevMode ){
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//
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// NULL, so delete the value.
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//
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Status = RegDeleteValue( hKey, pszValue );
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//
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// If value not found, don't fail.
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//
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if( Status == ERROR_FILE_NOT_FOUND ){
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Status = ERROR_SUCCESS;
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}
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} else {
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Status = RegSetValueEx( hKey,
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pszValue,
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0,
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REG_BINARY,
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(PBYTE)pDevMode,
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pDevMode->dmSize +
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pDevMode->dmDriverExtra );
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if( Status == ERROR_SUCCESS ){
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//
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// Notify everyone that the DevMode has changed.
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//
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SendNotifyMessage( HWND_BROADCAST,
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WM_DEVMODECHANGE,
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0,
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(LPARAM)pszPrinter );
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}
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}
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RegCloseKey( hKey );
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if( Status != ERROR_SUCCESS ){
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SetLastError( Status );
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return FALSE;
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}
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return TRUE;
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}
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BOOL
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bGetDevModePerUser(
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HKEY hKeyUser,
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LPCWSTR pszPrinter,
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PDEVMODE *ppDevMode
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)
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/*++
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Routine Description:
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Retrieves the per-user DevMode based on the current user.
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Arguments:
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hKeyUser - HKEY_CURRENT_USER handle. OPTIONAL
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pszPrinter - Printer to get.
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ppDevMode - Receives pointer to devmode. Must be freed by callee.
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Return Value:
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TRUE - Success: able to check if per-user DevMode exists. *ppDevMode
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is NULL if no per-user DevMode is there. (TRUE does not indicate
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that a per-user DevMode was found, only that we successfully checked.)
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FALSE - Failure.
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--*/
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{
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HKEY hKey = NULL;
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LPWSTR pszValue = NULL;
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LONG Status;
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*ppDevMode = NULL;
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if( !pszPrinter ){
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SetLastError( ERROR_INVALID_HANDLE );
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return FALSE;
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}
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//
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// Retrieve the location of the DevMode.
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//
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if( !bGetDevModeLocation( hKeyUser,
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pszPrinter,
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&hKey,
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&pszValue )){
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Status = GetLastError();
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} else {
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DWORD cbDevModePerUser;
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//
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// Key exists. See if we can read it and get the per-user DevMode.
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//
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Status = RegQueryInfoKey( hKey,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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&cbDevModePerUser,
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NULL,
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NULL );
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if( Status == ERROR_SUCCESS ){
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if( cbDevModePerUser >= MIN_DEVMODE_SIZEW ){
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*ppDevMode = AllocSplMem( cbDevModePerUser );
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if( !*ppDevMode ){
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Status = GetLastError();
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} else {
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Status = RegQueryValueEx( hKey,
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pszValue,
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NULL,
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NULL,
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(PBYTE)*ppDevMode,
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&cbDevModePerUser );
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if (ERROR_SUCCESS == Status) {
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Status = IsValidDevmode(*ppDevMode, cbDevModePerUser);
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//
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// If the devmode isn't valid, delete it and treat it
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// as if the devmode cannot be found.
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//
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if (ERROR_SUCCESS != Status) {
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//
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// If we can delete the key, just consider it as if
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// it does not exist.
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//
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if (ERROR_SUCCESS == RegDeleteValue(hKey, pszValue)) {
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Status = ERROR_FILE_NOT_FOUND;
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}
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}
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}
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if( Status != ERROR_SUCCESS ){
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FreeSplMem( *ppDevMode );
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*ppDevMode = NULL;
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}
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//
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// Allow ERROR_FILE_NOT_FOUND to return success. *ppDevMode
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// is still NULL, but we return TRUE to indicate that we
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// successfully checked the registry--we just didn't find one.
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//
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if( Status == ERROR_FILE_NOT_FOUND ){
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Status = ERROR_SUCCESS;
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}
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}
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}
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}
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RegCloseKey( hKey );
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}
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if( Status != ERROR_SUCCESS ){
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SetLastError( Status );
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return FALSE;
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}
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return TRUE;
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}
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BOOL
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bCompatibleDevMode(
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PPRINTHANDLE pPrintHandle,
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PDEVMODE pDevModeBase,
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PDEVMODE pDevModeNew
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)
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/*++
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Routine Description:
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Check if two DevModes are compatible (e.g., they can be used
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interchangably).
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This is done by checking size and version information. Not
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foolproof, but the best we can do since we can't look at private
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information.
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Arguments:
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pPrintHandle - Printer to check.
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pDevModeBase - Known good DevMode.
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pDevModeNew - DevMode to check.
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Return Value:
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TRUE - Appears compatible.
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FALSE - Not compatible.
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--*/
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{
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if( !pDevModeBase || ! pDevModeNew ){
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return FALSE;
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}
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return pDevModeBase->dmSize == pDevModeNew->dmSize &&
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pDevModeBase->dmDriverExtra == pDevModeNew->dmDriverExtra &&
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pDevModeBase->dmSpecVersion == pDevModeNew->dmSpecVersion &&
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pDevModeBase->dmDriverVersion == pDevModeNew->dmDriverVersion;
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}
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/********************************************************************
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Support Functions
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********************************************************************/
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BOOL
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bGetDevModeLocation(
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IN HKEY hKeyUser, OPTIONAL
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IN LPCWSTR pszPrinter,
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OUT PHKEY phKey,
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OUT LPCWSTR *ppszValue
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)
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/*++
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Routine Description:
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Retrieves the location of the per-user DevMode.
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On success, caller is responsible for closing phKey. ppszValue's
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life is dependent on pszPrinter.
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Arguments:
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hKeyUser - HKEY_CURRENT_USER key--optional. If not specified, current
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impersonation used.
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pszPrinter - Printer to use.
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phKey - Receives R/W key of per-user DevMode. On success, this
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must be closed by caller.
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ppszValue - Receives value of per-user DevMode (where to read/write).
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Return Value:
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TRUE - Success
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FALSE - Failure, LastError set.
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--*/
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{
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HANDLE hKeyClose = NULL;
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DWORD Status;
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*phKey = NULL;
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*ppszValue = NULL;
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if( !hKeyUser ){
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hKeyUser = GetClientUserHandle( KEY_READ|KEY_WRITE );
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hKeyClose = hKeyUser;
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}
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if( !hKeyUser ){
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//
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// Failed to get impersonation information. Probably because
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// we're not impersonating, so there's no per-user information.
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//
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Status = GetLastError();
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} else {
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//
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// If it starts with two backslashes, it may be either a connection
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// or a masq printer.
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//
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if( pszPrinter[0] == L'\\' && pszPrinter[1] == L'\\' )
|
||
|
|
{
|
||
|
|
|
||
|
|
//
|
||
|
|
// Query the registry for pszPrinter and look for DevMode.
|
||
|
|
// First look at the HKCU:Printer\Connections.
|
||
|
|
//
|
||
|
|
|
||
|
|
if((Status = RegOpenConnectionKey(hKeyUser,(LPWSTR)pszPrinter,phKey)) == ERROR_SUCCESS)
|
||
|
|
{
|
||
|
|
*ppszValue = gszDevMode;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// If we didn't find it in Printer\Connection, then it
|
||
|
|
// must be a local or masq printer.
|
||
|
|
//
|
||
|
|
if( !*ppszValue ){
|
||
|
|
|
||
|
|
DWORD dwIgnore;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Not a connection or didn't exist in the connections key.
|
||
|
|
// Look in the Printers\DevModePerUser key.
|
||
|
|
//
|
||
|
|
Status = RegCreateKeyEx( hKeyUser,
|
||
|
|
gszDevModePerUserLocal,
|
||
|
|
0,
|
||
|
|
NULL,
|
||
|
|
0,
|
||
|
|
KEY_READ | KEY_WRITE,
|
||
|
|
NULL,
|
||
|
|
phKey,
|
||
|
|
&dwIgnore );
|
||
|
|
|
||
|
|
if( Status == ERROR_SUCCESS ){
|
||
|
|
*ppszValue = pszPrinter;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if( hKeyClose ){
|
||
|
|
RegCloseKey( hKeyClose );
|
||
|
|
}
|
||
|
|
|
||
|
|
if( Status != ERROR_SUCCESS ){
|
||
|
|
SetLastError( Status );
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
BOOL bGetDevModePerUserEvenForShares(
|
||
|
|
HKEY hKeyUser,
|
||
|
|
LPCWSTR pszPrinter,
|
||
|
|
PDEVMODE *ppDevMode
|
||
|
|
)
|
||
|
|
{
|
||
|
|
BOOL RetVal = FALSE;
|
||
|
|
HANDLE hPrinter;
|
||
|
|
|
||
|
|
if(OpenPrinter((LPWSTR)pszPrinter,&hPrinter,NULL))
|
||
|
|
{
|
||
|
|
DWORD PrntrInfoSize=0,PrntrInfoSizeReq=0;
|
||
|
|
PPRINTER_INFO_2 pPrinterInfo2 = NULL;
|
||
|
|
|
||
|
|
if(!GetPrinter(hPrinter,
|
||
|
|
2,
|
||
|
|
(LPBYTE)pPrinterInfo2,
|
||
|
|
PrntrInfoSize,
|
||
|
|
&PrntrInfoSizeReq) &&
|
||
|
|
(GetLastError() == ERROR_INSUFFICIENT_BUFFER) &&
|
||
|
|
(pPrinterInfo2 = (PPRINTER_INFO_2)AllocSplMem((PrntrInfoSize = PrntrInfoSizeReq))) &&
|
||
|
|
GetPrinter(hPrinter,
|
||
|
|
2,
|
||
|
|
(LPBYTE)pPrinterInfo2,
|
||
|
|
PrntrInfoSize,
|
||
|
|
&PrntrInfoSizeReq))
|
||
|
|
{
|
||
|
|
RetVal = bGetDevModePerUser( hKeyUser,
|
||
|
|
pPrinterInfo2->pPrinterName,
|
||
|
|
ppDevMode );
|
||
|
|
}
|
||
|
|
|
||
|
|
if(hPrinter)
|
||
|
|
ClosePrinter(hPrinter);
|
||
|
|
|
||
|
|
if(pPrinterInfo2)
|
||
|
|
FreeSplMem(pPrinterInfo2);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
RetVal = bGetDevModePerUser( hKeyUser,
|
||
|
|
pszPrinter,
|
||
|
|
ppDevMode );
|
||
|
|
}
|
||
|
|
|
||
|
|
return(RetVal);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Name:
|
||
|
|
|
||
|
|
IsValidDevmode
|
||
|
|
|
||
|
|
Description:
|
||
|
|
|
||
|
|
Check to see whether the devmode passed in is at least as advertised in its
|
||
|
|
buffer.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
pDevmode - The devmode
|
||
|
|
DevmodeSize - The size of the devmode as advertised in the registry.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
An HRESULT
|
||
|
|
|
||
|
|
--*/
|
||
|
|
DWORD
|
||
|
|
IsValidDevmode(
|
||
|
|
IN PDEVMODE pDevmode,
|
||
|
|
IN size_t DevmodeSize
|
||
|
|
)
|
||
|
|
{
|
||
|
|
DWORD Status = ERROR_SUCCESS;
|
||
|
|
|
||
|
|
//
|
||
|
|
// This guarantees that the devmode is at least big enough to get the dmSize
|
||
|
|
// and dmDriverExtra.
|
||
|
|
//
|
||
|
|
Status = DevmodeSize >= MIN_DEVMODE_SIZEW ? ERROR_SUCCESS : ERROR_INVALID_DATA;
|
||
|
|
|
||
|
|
//
|
||
|
|
// The advertised devmode size must be contained inside
|
||
|
|
//
|
||
|
|
if (ERROR_SUCCESS == Status)
|
||
|
|
{
|
||
|
|
Status = (size_t)(pDevmode->dmSize + pDevmode->dmDriverExtra) <= DevmodeSize ? ERROR_SUCCESS : ERROR_INVALID_DATA;
|
||
|
|
}
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|