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

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

How to upgrade your character in Spellsp...
So you’ve mastered the basics of Spellspire. By which I mean you’ve realised it’s all about spelling things in a spire. What next? Well you’re going to need to figure out how to toughen up your character. It’s all well and good being able to spell... | Read more »
5 slither.io mash-ups we'd love to...
If there's one thing that slither.io has proved, it's that the addictive gameplay of Agar.io can be transplanted onto basically anything and it will still be good fun. It wouldn't be surprising if we saw other developers jumping on the bandwagon,... | Read more »
How to navigate the terrain in Sky Charm...
Sky Charms is a whimsical match-'em up adventure that uses creative level design to really ramp up the difficulty. [Read more] | Read more »
Victorious Knight (Games)
Victorious Knight 1.3 Device: iOS Universal Category: Games Price: $1.99, Version: 1.3 (iTunes) Description: New challenges awaits you! Experience fresh RPG experience with a unique combat mechanic, packed with high quality 3D... | Read more »
Agent Gumball - Roguelike Spy Game (Gam...
Agent Gumball - Roguelike Spy Game 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Someone’s been spying on Gumball. What the what?! Two can play at that game! GO UNDERCOVERSneak past enemy... | Read more »
Runaway Toad (Games)
Runaway Toad 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: It ain’t easy bein’ green! Tap, hold, and swipe to help Toad hop to safety in this gorgeous new action game from the creators of... | Read more »
PsyCard (Games)
PsyCard 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: From the makers och Card City Nights, Progress To 100 and Ittle Dew PSYCARD is a minesweeper-like game set in a cozy cyberpunk... | Read more »
Sago Mini Robot Party (Education)
Sago Mini Robot Party 1.0 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0 (iTunes) Description: -- Children's Technology Review Editor's Choice -- | Read more »
How to get a high score in every level o...
Sky Charms is an adorable match three puzzler that provides a decent challenge thanks to its creative level design. It regularly presents something new, forcing you to think on your feet. [Read more] | Read more »
Apestorm: Full Bananas (Games)
Apestorm: Full Bananas 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: ***Launch sale – limited time only!*** Fugitive Apes have taken to the skies in search of revenge after humans have... | Read more »

Price Scanner via MacPrices.net

Apple restocks Certified Refurbished Mac mini...
Apple has restocked Certified Refurbished 2014 Mac minis, with models available starting at $419. Apple’s one-year warranty is included with each mini, and shipping is free: - 1.4GHz Mac mini: $419 $... Read more
15-inch 2.2GHz Retina MacBook Pro on sale for...
Amazon.com has the 15″ 2.2GHz Retina MacBook Pro on sale for $1699.99 including free shipping. Their price is $300 off MSRP, and it’s the lowest price available for this model from any reseller (and... Read more
Apple Beats Microsoft at Own Game; Amazon Pri...
First quarter seasonality combined with an overall disinterested customer base led to an annual decline of 14.7% in worldwide tablet shipments during the first quarter of 2016 (1Q16). Worldwide... Read more
Tablets Had Worst Quarter Since 2012, says St...
The global tablet market began 2016 just as 2015 left off, down. Tablet shipments fell 10% to 46.5 million units during the Q1 2016, according to the new “Preliminary Global Tablet Shipments and... Read more
Clearance 13-inch MacBook Airs, Apple refurbi...
Apple recently dropped prices on certified refurbished 2015 13″ MacBook Airs with 4GB of RAM with models now available starting at $759. An Apple one-year warranty is included with each MacBook, and... Read more
Clearance 12-inch Retina MacBooks, Apple refu...
Apple has dropped prices on Certified Refurbished 2015 12″ Retina MacBooks with models now available starting at $929. Apple will include a standard one-year warranty with each MacBook, and shipping... Read more
Aleratec Releases Mac Software Upgrade for 1...
California based Aleratec Inc., designer, developer and manufacturer of Portable Device Management (PDM) charge/sync products for mobile devices and professional-grade duplicators for hard disk... Read more
Sale! Amazon offers 27-inch iMac, 13-inch 2.9...
Amazon has the 27″ 3.2GHz 5K iMac and the 13″ 3.9GHz Retina MacBook Pro on sale for $300 off MSRP, each including free shipping, for a limited time: - 27″ 3.2GHz/1TB HD 5K iMac (model MK462LL/A): $... Read more
Apple refurbished 13-inch Retina MacBook Pros...
Apple has Certified Refurbished 13″ Retina MacBook Pros available for up to $270 off the cost of new models. An Apple one-year warranty is included with each model, and shipping is free: - 13″ 2.7GHz... Read more
13-inch 2.7GHz/128GB Retina MacBook Pro on sa...
Take $200 off MSRP on the price of a new 13″ 2.7GHz/128GB Retina MacBook Pro (model MF839LL/A) at Amazon. Shipping is free: - 13″ 2.7GHz/128GB Retina MacBook Pro: $1099.99 $200 off MSRP Act now if... Read more

Jobs Board

Automotive Sales Consultant - Apple Ford Linc...
…you. The best candidates are smart, technologically savvy and are customer focused. Apple Ford Lincoln Apple Valley is different, because: $30,000 annual salary Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Solutions Consultant - Apple (United...
# Apple Solutions Consultant Job Number: 48260200 Phoenix, Arizona, United States Posted: Apr. 22, 2016 Weekly Hours: 40.00 **Job Summary** As an Apple Solutions Read more
Restaurant Manager (Neighborhood Captain) - A...
…in every aspect of daily operation. WHY YOU'LL LIKE IT: You'll be the Big Apple . You'll solve problems. You'll get to show your ability to handle the stress and Read more
Simply Mac *Apple* Specialist- Service Repa...
Simply Mac is the largest premier retailer of Apple products in the nation. In order to support our growing customer base, we are currently looking for a driven Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.