/*
 * Copyright (c) 2001-2003 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 *  BLIsOpenFirmwarePresent.c
 *  bless
 *
 *  Created by Shantonu Sen on Tue Jul 22 2003.
 *  Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
 *
 *  $Id: BLIsOpenFirmwarePresent.c,v 1.5 2003/08/26 00:39:09 ssen Exp $
 *
 *  $Log: BLIsOpenFirmwarePresent.c,v $
 *  Revision 1.5  2003/08/26 00:39:09  ssen
 *  new minibless target
 *
 *  Revision 1.4  2003/07/25 05:22:21  ssen
 *  add newline to end of file
 *
 *  Revision 1.3  2003/07/25 00:19:10  ssen
 *  add more apsl 2.0 license
 *
 *  Revision 1.2  2003/07/23 18:24:53  ssen
 *  Per Josh, Apple OF will always have IODeviceTree:/openprom
 *
 *  Revision 1.1  2003/07/23 07:29:33  ssen
 *  Add and export BLIsOpenFirmwarePresent. Only try to set OF
 *  via nvram(8) if the machine actually uses Open Firmware
 *
 *
 */

#include <stdlib.h>
#include <unistd.h>
#include <sys/param.h>

#include <mach/mach_error.h>

#include <IOKit/IOKitLib.h>
#include <IOKit/IOKitKeys.h>

#include <CoreFoundation/CoreFoundation.h>

#include "bless.h"
#include "bless_private.h"

#define kBootRomPath "/openprom"

int BLIsOpenFirmwarePresent(BLContextPtr context) {

    const char path[] = kIODeviceTreePlane ":" kBootRomPath;
    kern_return_t ret;
    io_registry_entry_t entry = NULL;
    CFMutableDictionaryRef props = NULL;
    CFDataRef model = NULL;
    mach_port_t	masterPort;
    
    ret = IOMasterPort( MACH_PORT_NULL, &masterPort );
    if(ret) return 0;
    
    entry = IORegistryEntryFromPath(masterPort, path);

    if(entry == NULL) {
	contextprintf(context, kBLLogLevelVerbose,  "%s not present in IORegistry. OpenFirmware not present\n", path);
	return 0;
    }


    ret = IORegistryEntryCreateCFProperties(entry, &props,
					    kCFAllocatorDefault, 0);

    if(ret) {
	contextprintf(context, kBLLogLevelError, "Could not get entry properties\n");
	CFRelease(props);
	IOObjectRelease(entry);
	return 0;
    }

    model = CFDictionaryGetValue(props, CFSTR("model"));
    if(model == NULL) {
	contextprintf(context, kBLLogLevelVerbose,  "No 'model' property for %s\n", path);
	CFRelease(props);
	IOObjectRelease(entry);
	return 0;
    }

    contextprintf(context, kBLLogLevelVerbose, "%s found\n", path);

    contextprintf(context, kBLLogLevelVerbose, "OpenFirmware model is \"%*s\"\n", CFDataGetLength(model), CFDataGetBytePtr(model));
    
    CFRelease(props);
    IOObjectRelease(entry);

    return 1;
}