TweetFollow Us on Twitter

FakeFinder
Volume Number:12
Issue Number:4
Column Tag:Assembler Workshop

FakeFinder

A tiny file-launching hack for those emergencies...

By Lee David Rimar

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

What with it being April and the call of April Fool’s Day echoing in the breezes, it seems an appropriate time to put before the public this little horror that arrived at our desks a while back. Please bear in mind that when we say, “Kids, don’t try this at home,” this is one case where we mean it. It really does work, but the publisher, editors and staff of MacTech Magazine categorically refuse to stand behind or endorse it in any way, and will not be held responsible for what happens to you or anyone else as a result of your assembling this code or downloading the alternate Finder app. In fact, we can’t even be held responsible for what may happen to you if you read the article! Why not just turn the page now? Hey, I said turn the page! Okay, you asked for it

What It Is and
Why You Might Want It

With current releases of the Mac OS, it’s sometimes hard to build a useful emergency boot diskette. If your hard-drive won’t boot, you can usually use the Disk Tools floppy to bring up your system. But if you want other diagnostic and/or system recovery programs on your “emergency” diskette, there usually isn’t enough space. Enter FakeFinder.

FakeFinder is a tiny program (under 800 bytes) that simply launches other programs. On emergency boot diskettes, FakeFinder replaces the real Finder, and frees a lot of space.

How To Use It

To create an emergency boot disk with FakeFinder:

• Format a diskette and label it Emergency.

• Copy the following file(s) from your Disk Tools diskette to the root directory of Emergency:

1) the System file

2) optional: the Apple CD-ROM Extension

• If your Mac requires any system enablers, copy these also to the root directory of Emergency.

• Copy the “Finder” application from the FakeFinder package to the root directory of Emergency.

You now have a bootable diskette with considerable free space on it. Go ahead and add any other programs you want in the root directory of this disk, anything that will fit. My personal preference is to keep most of what’s on the Disk Tools floppy, and add my tape backup/restore software.

When you reboot with this diskette, FakeFinder loads and creates a File menu with only two items on it: Open and Quit.

To launch any program(s), select Open. This will let you select any applications, aliases to applications, and even a “real” Finder on any mounted drive - including CDs, if you copied the Apple CD-ROM Extension to the diskette.

To shut down your Mac, select Quit, and also quit any other applications you may have launched. Your Mac will then shut down normally.

Limitations
(or, This Ain’t No Swiss Army Knife)

To be so small, FakeFinder leaves a lot of stuff out. The most important limitations:

• No desk accesories/Apple Menu items.

• Without a real Finder present, you can’t use File Sharing.

• Programs needing to find a “Blessed Folder,” containing a real Finder and System, may not work.

The point of FakeFinder was to make it as small as possible, so I don’t plan to solve any of these problems.

By The Way: How Did It Get So Small?

Normally, to create an application this small, you would start in assembly language. But I don’t grok 68K assembler well enough to write anything from the ground up. So I wrote, compiled, linked, and tested FakeFinder using FORTRAN, a language I do know. Then I disassembled the compiler’s output, modified it to reduce the code size, and re-assembled it.

Disclaimers
(or, Anything Free Comes With No Guarantee)

Though FakeFinder works properly on every system I have tested so far, it may not work on tomorrow’s systems. This is because it uses the _Launch trap to sublaunch applications, and Apple says this functionality may go away in future OS releases. If and when that time comes, it will be necessary to rewrite any applications using the sublaunch facility.

References

Macintosh Tech Notes #126, #180, #205 (old numbering system).

MACHINE MC68000

; system routines used in this module

_AppendMenu     OPWORD  $A933
_DrawMenuBar    OPWORD  $A937
_ExitToShell    OPWORD  $A9F4
_FindWindow     OPWORD  $A92C
_HFSDispatch    OPWORD  $A260
_HiliteMenu     OPWORD  $A938
_InitCursor     OPWORD  $A850
_InitDialogs    OPWORD  $A97B
_InitFonts      OPWORD  $A8FE
_InitGraf       OPWORD  $A86E
_InitMenus      OPWORD  $A930
_InitWindows    OPWORD  $A912
_InsertMenu     OPWORD  $A935
_Launch         OPWORD  $A9F2
_MenuSelect     OPWORD  $A93D
_NewMenu        OPWORD  $A931
_StdFile        OPWORD  $A9EA
_SetVol         OPWORD  $A015
_WaitNextEvent  OPWORD  $A860

START:  MAIN

; make a stack, initialize managers, and set up menus

        link            a6,#-664

        lea             (266,a7),a2 ; qd.grafport
        move.l          a2,(a7)
        _InitGraf
        _InitFonts
        _InitWindows
        _InitMenus
        _InitDialogs
        _InitCursor

        lea             AppleMenu,a2
        move.l          a2,(a7)
        move.w          #$80,(4,a7)
        _NewMenu
        move.l          (a7),a3
        move.w          #0,(a7)
        move.l          a3,(2,a7)
        _InsertMenu
        lea             FileMenu,a2
        move.l          a2,(a7)
        move.w          #$81,(4,a7)
        _NewMenu
        move.l          (a7),a3
        move.w          #0,(a7)
        move.l          a3,(2,a7)
        _InsertMenu
        lea             MenuItems,a2
        move.l          a2,(a7)
        move.l          a3,(4,a7)
        _AppendMenu
        _DrawMenuBar

        sub.l           #36,a7

Loop:

; If (.NOT. WaitNextEvent(
;       VAL2(-1),event,VAL(15),VAL(0))) Loop

        move.l          #0,(a7)
        move.l          #15,(4,a7)
        lea             (288,a7),a2
        move.l          a2,(8,a7)
        move.w          #-1,(12,a7)
        _WaitNextEvent
        move.b          (a7),d3
        sub.l           #$000e,a7
        tst.b           d3
        beq.s           Loop

; If (event.what != mouseDown) Loop

        move.w          (288,a7),d3
        cmp.w           #1,d3
        bne.s           Loop

; If (FindWindow(
;       VAL(event.where),dummy) != inMenuBar) Loop

        lea             (272,a7),a2
        move.l          a2,(a7)
        move.l          (298,a7),(4,a7)
        _FindWindow
        move.w          (a7),d3
        sub.l           #8,a7
        cmp.w           #1,d3
        bne.s           Loop

; pick = MenuSelect(VAL(event.where))
; Call HiliteMenu(VAL2(0))

        move.l          (298,a7),(a7)
        _MenuSelect
        move.l          (a7),d3
        move.w          #0,(a7)
        _HiliteMenu
        sub.l           #6,a7

; If (pick == z'00810001') GetFile
; If (pick != z'00810002') Loop
; Call ExitToShell

        cmp.l           #$810001,d3
        beq.s           GetFile
        cmp.l           #$810002,d3
        bne.s           Loop

        _ExitToShell

GetFile:

; Call SFGetFile(
;       VAL(coords),0,VAL(0),VAL2(3),types,VAL(0),reply)

        lea             (304,a7),a2
        move.l          a2,(a7)
        move.l          #0,(4,a7)
        lea             types,a2
        move.l          a2,(8,a7)
        move.w          #3,(12,a7)
        move.l          #0,(14,a7)
        move.l          #0,(18,a7)
        move.l          #$00400040,(22,a7)
        move.w          #$2,-(a7)
        _StdFile
        sub.l           #$001a,a7

; If (.NOT. reply.good) Loop

        move.b          (304,a7),d3
        tst.b           d3
        beq.s           final

; myPB.p_ioName = LOC(reply.fName)
; myPB.ioVRefNum = reply.vRefNum
; myPB.ioFDirIndex = 0
; myPB.ioDirID = 0
; If (PBGetCatInfoSync(myPB) != 0) Loop

        lea             (314,a7),a2
        move.l          a2,(478,a7)
        move.w          (310,a7),(482,a7)
        move.l          #0,(488,a7)
        move.l          #0,(508,a7)
        lea             (460,a7),a2
        move.l          a2,(a7)
        movea.l         (a7)+,a0
        move.w          #9,d0
        _HFSDispatch
        sub.l           #4,a7
        tst.w           d0
        bne.s           final

; params.ioCompletion = 0
; params.ioResult = 0
; params.p_ioName = 0
; params.ioVRefNum = reply.vRefNum
; If(PBSetVolSync(params).LT.0) Loop

        move.l          #0,(392,a7)
        move.w          #0,(396,a7)
        move.l          #0,(398,a7)
        move.w          (310,a7),(402,a7)
        lea             (380,a7),a2
        move.l          a2,(a7)
        movea.l         (a7)+,a0
        _SetVol
        sub.l           #4,a7

; ap.pfName = LOC(reply.fName)
; ap.param = 0
; ap.LC = z'4C43'
; ap.extBlockLen = 6
; ap.fFlags = myPB.ioFlFndrInfo.fdFlags
; ap.launchFlags = z'C0000000'

        lea             (314,a7),a2
        move.l          a2,(568,a7)
        move.w          #0,(572,a7)
        move.w          #$4C43,(574,a7)
        move.l          #6,(576,a7)
        move.w          (500,a7),(580,a7)
        move.l          #$c0000000,(582,a7)

; ignore = launch(ap)

        lea             (568,a7),a2
        move.l          a2,(a7)
        movea.l         (a7)+,a0
        _Launch
        sub.l           #4,a7

final:  bra             Loop

; some constants embedded in code section

types: ; file types for getfile, what you can launch with FakeFinder

        dc.l            $4150504c ; APPL
        dc.l            $464e4452 ; FNDR
        dc.l            $61647270 ; adrp (application aliases)

AppleMenu: ; Apple Menu character, for appearances only!

        dc.b    1
        dc.b    20

FileMenu: ; Pascal String “File”

        dc.b    4
        dc.b    70
        dc.b    105
        dc.b    108
        dc.b    101
        dc.b    0 ; pad so next lands on even address

MenuItems: ; Pascal string “Open;Quit”

        dc.b    9
        dc.b    79
        dc.b    112
        dc.b    101
        dc.b    110
        dc.b    59
        dc.b    81
        dc.b    117
        dc.b    105
        dc.b    116

        ENDMAIN
        END

 
AAPL
$103.40
Apple Inc.
+0.93
MSFT
$44.92
Microsoft Corpora
+0.04
GOOG
$538.81
Google Inc.
+12.27

MacTech Search:
Community Search:

Software Updates via MacUpdate

Apple Security Update 2014-005 - For OS...
Apple Security Update is recommended for all users and improves the security of Mac OS X. For information on the security content of this update, please visit this website: http://support.apple.com/... Read more
EyeTV 3.6.6 - Watch and record TV on you...
EyeTV brings a rich TV experience to your Mac. Watch live TV on your Mac. Pause, rewind, and record whenever you want. EyeTV gives you powerful control over what you watch and how you watch it. Put... Read more
RapidWeaver 6.0 - Create template-based...
RapidWeaver is a next-generation Web design application to help you easily create professional-looking Web sites in minutes. No knowledge of complex code is required, RapidWeaver will take care of... Read more
NTFS 12.0.39 - Provides full read and wr...
Paragon NTFS breaks down the barriers between Windows and OS X. Paragon NTFS effectively solves the communication problems between the Mac system and NTFS, providing full read and write access to... Read more
RestoreMeNot 2.0.3 - Disable window rest...
RestoreMeNot provides a simple way to disable the window restoration for individual applications so that you can fine-tune this behavior to suit your needs. Please note that RestoreMeNot is designed... Read more
Macgo Blu-ray Player 2.10.9.1750 - Blu-r...
Macgo Mac Blu-ray Player can bring you the most unforgettable Blu-ray experience on your Mac. Overview Macgo Mac Blu-ray Player can satisfy just about every need you could possibly have in a Blu-ray... Read more
Apple iOS 8.1 - The latest version of Ap...
The latest version of iOS can be downloaded through iTunes. Apple iOS 8 comes with big updates to apps you use every day, like Messages and Photos. A whole new way to share content with your family.... Read more
TechTool Pro 7.0.5 - Hard drive and syst...
TechTool Pro is now 7, and this is the most advanced version of the acclaimed Macintosh troubleshooting utility created in its 20-year history. Micromat has redeveloped TechTool Pro 7 to be fully 64... Read more
PDFKey Pro 4.0.2 - Edit and print passwo...
PDFKey Pro can unlock PDF documents protected for printing and copying when you've forgotten your password. It can now also protect your PDF files with a password to prevent unauthorized access and/... Read more
Yasu 2.9.1 - System maintenance app; per...
Yasu was originally created with System Administrators who service large groups of workstations in mind, Yasu (Yet Another System Utility) was made to do a specific group of maintenance tasks... Read more

Latest Forum Discussions

See All

Reshape Review
Reshape Review By Jennifer Allen on October 22nd, 2014 Our Rating: :: SIMPLE SHAPESUniversal App - Designed for iPhone and iPad Match triangles together to form cubes in this fast-paced and twitchy game.   | Read more »
Miika (Games)
Miika 1.0.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0.0 (iTunes) Description: Miika is a beautiful 3D puzzle game based on camera perspectives combined with the use of optical illusions. Miika challenges... | Read more »
Infuse Pro (Photography)
Infuse Pro 3.0 Device: iOS Universal Category: Photography Price: $9.99, Version: 3.0 (iTunes) Description: ** All-new version 3 includes fully licensed and certified DTS® and DTS-HD® audio! ** | Read more »
Swap Heroes (Games)
Swap Heroes 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: **Half price for a limited time only** Swap Heroes is a casual turn-based strategy adventure. Form a group of heroes and guide them... | Read more »
Ghost Blade (Games)
Ghost Blade 1.1 Device: iOS Universal Category: Games Price: $4.99, Version: 1.1 (iTunes) Description: Get the most outstanding 3D Action Game from App Store NOW! For those who dare pursue dreams. Masterpiece of Yu Shi Game ---China... | Read more »
Fiete – A Day on a Farm Review
Fiete – A Day on a Farm Review By Amy Solomon on October 21st, 2014 Our Rating: :: A MEMORABLE EXPERIENCEUniversal App - Designed for iPhone and iPad Fiete – A day on a farm in an interactive app for young children full of... | Read more »
Tilt to Live: Gauntlet’s Revenge is Almo...
Tilt to Live: Gauntlet’s Revenge is Almost Here Posted by Jessica Fisher on October 21st, 2014 [ permalink ] One Man Left has announced the official release date of Tilt to Live: Gauntlet’s Re | Read more »
Starfly Review
Starfly Review By Jennifer Allen on October 21st, 2014 Our Rating: :: CHANGE OF PACEiPad Only App - Designed for the iPad Want a slightly different browsing experience? Starfly is a pretty personalized one but it’s also buggy.   | Read more »
Sago Mini Monsters Celebrates Halloween...
Sago Mini Monsters Celebrates Halloween with Fun Costumes and Special Treats. Posted by Jessica Fisher on October 21st, 2014 [ permal | Read more »
The Bot Squad: Puzzle Battles – Tips, Tr...
01000010 01101111 01110100 01110011 00100001: Curious to know what we though about all this robot-on-robot carnage? Then check out our Bot Squad review! The Bot Squad: Puzzle Battles offers nearly 200 stages based on its varied approach to tower... | Read more »

Price Scanner via MacPrices.net

AT&T accepting preorders for new iPads fo...
AT&T Wireless is accepting preorders for the new iPad Air 2 and iPad mini 3, cellular models, for $100 off MSRP with a 2-year service agreement: - 16GB iPad Air 2 WiFi + Cellular: $529.99 - 64GB... Read more
Apple offering refurbished Mac Pros for up to...
The Apple Store is offering Apple Certified Refurbished 2013 Mac Pros for up to $600 off the cost of new models. An Apple one-year warranty is included with each Mac Pro, and shipping is free. The... Read more
Select MacBook Airs $100 off MSRP, free shipp...
B&H Photo has 2014 a couple of MacBook Airs on sale for $100 off MSRP. Shipping is free, and B&H charges NY sales tax only. They also include free copies of Parallels Desktop and LoJack for... Read more
13-inch 2.5GHz MacBook Pro on sale for $100 o...
B&H Photo has the 13″ 2.5GHz MacBook Pro on sale for $999.99 including free shipping plus NY sales tax only. Their price is $100 off MSRP. Read more
Strong iPhone, Mac And App Store Sales Drive...
Apple on Monday announced financial results for its fiscal 2014 fourth quarter ended September 27, 2014. The Company posted quarterly revenue of $42.1 billion and quarterly net profit of $8.5 billion... Read more
Apple Posts How-To For OS X Recovery
OS X 10.7 Lion and later include OS X Recovery. This feature includes all of the tools you need to reinstall OS X, repair your disk, and even restore from a Time Machine backup. OS X Recovery... Read more
Mac OS X Versions (Builds) Supported By Vario...
Apple Support has posted a handy resource explaining which Mac OS X versions (builds) originally shipped with or are available for your computer via retail discs, downloads, or Software Update. Apple... Read more
Deals on 2011 13-inch MacBook Airs, from $649
Daily Steals has the Mid-2011 13″ 1.7GHz i5 MacBook Air (4GB/128GB) available for $699 with a 90 day warranty. The Mid-2011 13″ 1.7GHz i5 MacBook Air (4GB/128GB SSD) is available for $649 at Other... Read more
2013 15-inch 2.0GHz Retina MacBook Pro availa...
B&H Photo has leftover previous-generation 15″ 2.0GHz Retina MacBook Pros now available for $1599 including free shipping plus NY sales tax only. Their price is $400 off original MSRP. B&H... Read more
Updated iPad Prices
We’ve updated our iPad Air Price Tracker and our iPad mini Price Tracker with the latest information on prices and availability from Apple and other resellers, including the new iPad Air 2 and the... Read more

Jobs Board

Senior Event Manager, *Apple* Retail Market...
…This senior level position is responsible for leading and imagining the Apple Retail Team's global event strategy. Delivering an overarching brand story; in-store, Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
Project Manager / Business Analyst, WW *Appl...
…a senior project manager / business analyst to work within our Worldwide Apple Fulfillment Operations and the Business Process Re-engineering team. This role will work Read more
*Apple* Retail - Multiple Positions (US) - A...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Position Opening at *Apple* - Apple (United...
…customers purchase our products, you're the one who helps them get more out of their new Apple technology. Your day in the Apple Store is filled with a range of Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.