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

Ys Chronicles II (Games)
Ys Chronicles II 1.0.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0.0 (iTunes) Description: After a hard fight to recover the six sacred books in Ys Chronicles I, Adol is back for a sequel! | Read more »
FINAL FANTASY Ⅸ (Games)
FINAL FANTASY Ⅸ 1.0.4 Device: iOS Universal Category: Games Price: $16.99, Version: 1.0.4 (iTunes) Description: ==========●Special sale price for the FINAL FANTASY IX release! ●20% off from February 10 to February 21, 2016... | Read more »
Tennis Club Story (Games)
Tennis Club Story 1.03 Device: iOS Universal Category: Games Price: $4.99, Version: 1.03 (iTunes) Description: Aim for the ace position of tennis club prestige in this simulation! Your leadership decides if players make it to the big... | Read more »
Juggernaut Wars guide - How to use skill...
Juggernaut Warsis a brand new auto-RPG on iOS and Android that challenges you to build a team of heroes, send them out into various different missions to defeat waves of heroes, and level them up to increase their power. The actual combat itself... | Read more »
Check out the new Pirate Attack update i...
Love pirates and board games? Well, you'll love the new Pirate Attack themed update that just launched in Game of Dice. It adds a bunch of new content themed around pirates, like an all new event map based on a pirate ship which revamps the toll... | Read more »
Splash Cars guide - How to paint the tow...
Splash Cars is an arcade driving game that feels like a hybrid between Dawn of the Plow and Splatoon. In it, you'll need to drive a car around to repaint areas of a town that have lost all of their color. Check out these tips to help you perform... | Read more »
The best video player on mobile
We all know the stock video player on iOS is not particularly convenient, primarily because it asks us to hook a device up to iTunes to sync video in a world that has things like Netflix. [Read more] | Read more »
Four apps to help improve your Super Bow...
Super Bowl Sunday is upon us, and whether you’re a Panthers or a Broncos fan you’re no doubt gearing up for it. [Read more] | Read more »
LooperSonic (Music)
LooperSonic 1.0 Device: iOS Universal Category: Music Price: $4.99, Version: 1.0 (iTunes) Description: LooperSonic is a multi-track audio looper and recorder that will take your loops to the next level. Use it like a loop pedal to... | Read more »
Space Grunts guide - How to survive
Space Grunts is a fast-paced roguelike from popular iOS developer, Orange Pixel. While it taps into many of the typical roguelike sensibilities, you might still find yourself caught out by a few things. We delved further to find you some helpful... | Read more »

Price Scanner via MacPrices.net

What iPad Pro Still Needs To Make It Truly Pr...
I love my iPad Air 2. So much that I’m grudgingly willing to put up with its compromises and limitations as a production tool in order to take advantage of its virtues. However, since a computer for... Read more
21-inch 3.1GHz 4K on sale for $1399, $100 off...
B&H Photo has the 21″ 3.1GHz 4K iMac on sale $1399 for a limited time. Shipping is free, and B&H charges NY sales tax only. Their price is $100 off MSRP: - 21″ 3.1GHz 4K iMac (MK452LL/A): $... Read more
Apple price trackers, updated continuously
Scan our Apple Price Trackers for the latest information on sales, bundles, and availability on systems from Apple’s authorized internet/catalog resellers. We update the trackers continuously: - 15″... Read more
Save up to $240 with Apple Certified Refurbis...
Apple is now offering Certified Refurbished 12″ Retina MacBooks for up to $240 off the cost of new models. Apple will include a standard one-year warranty with each MacBook, and shipping is free. The... 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
Apple refurbished Time Capsules available for...
Apple has certified refurbished Time Capsules available for $120 off MSRP. Apple’s one-year warranty is included with each Time Capsule, and shipping is free: - 2TB Time Capsule: $179, $120 off - 3TB... Read more
13-inch 2.5GHz MacBook Pro (refurbished) avai...
Apple has Certified Refurbished 13″ 2.5GHz MacBook Pros available for $829, or $270 off the cost of new models. Apple’s one-year warranty is standard, and shipping is free: - 13″ 2.5GHz MacBook Pros... Read more
Apple refurbished 15-inch Retina MacBook Pros...
Apple has Certified Refurbished 2015 15″ Retina MacBook Pros available for up to $380 off the cost of new models. An Apple one-year warranty is included with each model, and shipping is free: - 15″ 2... Read more
New Liquid Crystal Technology Prevents Automo...
Researchers at the University of Central Florida have developed three new liquid crystal mixtures which will allow automobile displays to operate at unprecedented high and low temperatures In... Read more
BookBook For iPad Pro Coming Soon
The iPad Pro is a device unlike any other, and with Apple Pencil, it’s the ideal portable sketchpad: all that’s missing is the modern easel and portfolio to go. TwelveSouth’s BookBook for iPad Pro... Read more

Jobs Board

Lead Engineer - *Apple* OSX & Hardware...
Lead Engineer - Apple OSX & Hardware **Job ID:** 3125919 **Full/Part\-Time:** Full\-time **Regular/Temporary:** Regular **Listed:** 2016\-02\-10 **Location:** Cary, Read more
*Apple* System Analyst - ATOS IT Services...
Apple System AnalystReference no.198783CountryUSARegionUS - CALIFORNIACityUS - CALIFORNIA - BURBANKPosition TypeProfessionalJob AreaIT SupportJob TypeFull Read more
*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the 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
*Apple* Subject Matter Expert - Experis (Uni...
This position is for an Apple Subject Matter Expert to assist in developing the architecture, support and services for integration of Apple devices into the domain. Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.