Home » Archimedes archive » Micro User » MU 1991-11.adf » PD-stuff » !FileCheck/!Help/readme

!FileCheck/!Help/readme

This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk: Home » Archimedes archive » Micro User » MU 1991-11.adf » PD-stuff
Filename: !FileCheck/!Help/readme
Read OK:
File size: 1408 bytes
Load address: 0000
Exec address: 0000
File contents
***************************** Copyright Notice ******************************
*                                                                           *
*                          (c) 1991 Glyn Davies                             *
*                                                                           *
*****************************************************************************


                  Know if a !Run, !Boot, or !RunImage file 

                           increases in length

                             



Program : !FileCheck

Author  : Glyn Davies  

Purpose : Notify user if !Boot, !Run or !RunImage files increase in size
and rename offending files.

Version : 3.01 August 1991

Intro

     After reading many articles about viruses on the Acorn Archimedes I
set about trying to write a program which will copy it's self from one 
application to  another, and discovered it was surprisingly easy.   

Worried about this I  used the knowledge that I had gained in writing
 a 'virus' to write an anti virus, and !FileCheck is the result.

N.B. The virus refered to above has been sent into oblivion!
                   (So Don't blame me!)



How it does it!

    The program waits for WIMP message 5 (double click), when this occurs
it checks to see if an application is the object of the double click then
the   program looks for the 3 main application files:
         !Run
         !RunImage
         !Boot
    
 It then looks for its own data file, (which you set the first time you use
!FileCheck), which resides inside !<apps> 

 If any of the standard files (!Run, !RunImage, !Boot) are not present
they are assigned a length of 0 so any changes can be noted.  It then 
finds the length of the WIMP files and loads the data of their original 
length.

If any of the files have increased in size then they are renamed:

!Run      --->  !Virusrun
!Boot     --->  !Virusboot
!RunImage --->  !VirusImg


The user is notified of this and should then examine the offending file/s. 


If the file size is unchanged then the datafiles are left unchanged.

If you the user has updated an !<app> then simply drag the !<app> to the 
!FileCheck icon.  The datafile is then updated.

N.B. This program does not attempt to remove any viruses it merely attempts
to prevent their spread.


If you have used this program to protect your system and if it has worked 
as spec against a virus, I would like to hear about it.  Any cash is 
welcome, (I want to get the RiscOS programmers reference manuals, but as yet
cashflow is at an all time low.)

Copyright remains mine however this application may be freely distributed,
as long as it is not sold for more than two pounds.
It may not be altered in any way except to rename the datafile (in case 
any virus checks for mine)


If you have found any bugs (what?!?) or would like to donate to a fund 
to help me purchase the PROGRAMERS REFERENCE MANUALS I can be reached at :

   Plas Eyton,
   Sontley,
   Wrexham,
   Wales.
   LL130YD

           
Update:
     3.00

Recently added :

Now plays TRACKER modules from the desktop.
Speaker Off/On
Audio   Off/On
Pause   Off/On
Stop

TRACKER's are only played whilst !FileCheck is running

When errors occur clicking "CANCLE" quits instantly!
       

      Replaced !Runlen, !Bootlen, and !Imagelen with !FileCheck

     3.01

Removes old !Runlen, !Bootlen, and !Imagelen 

Removed Tracker playsystem, (Multi-tasking philosophy is best.)          

Improved structure of program (Actually a complete rewrite!)

Added Window to show affected files, instead of dialogue box.  

Now much better error control, more REM's and a shiny new icon!

(Well grey anyway)

Added ability to choose Wimp_Poll or Wimp_PollIdle

Now !FileCheck requires 40K, due to the increased number of functions.

If disc is write protected, computer does not repeat the error until the 
disc is not write protected anymore.

Added checking for arcfs: as, attempting to write to this causes many 
headaches.
                            
Clicking adjust on !FileCheck's icon now opens the infection count window

Now !FileCheck looks for a datafile "datafile" (Original Huh?) which stores
the users choosen datafile, when passing on !FileCheck copy the !<app> then 
delete the datafile inside the !<app> so the new user can choose his/her own
datafile name.  Also would be wise to remove datafiles when passing other 
!<app>'s on otherwise discspace would be wasted, and directorys cluttered.

       Disclaimer (Boring is'nt it?)

I will accept no responsibility for the loss of data due to the use or 
miss use of !FileCheck, It is supplied as is and no guarantee is made to
the user that !FileCheck can stop all viruses from spreading, remember it 
only checks !Run, !RunImage, and !Boot, as I feel they are the most 
vulnerable.


Things I intend to add to/change in !FileCheck:

Bug fixes when I am informed of them,

Scan of discs, (ie allow you to inserts a disc and !FileCheck wil check all
                !<apps>)

Any other features which a user suggests, and I feel worthwhile


Hope you find this useful Glyn Davies August 1991 
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000000b0  20 20 20 20 20 20 20 20  28 63 29 20 31 39 39 31  |        (c) 1991|
000000c0  20 47 6c 79 6e 20 44 61  76 69 65 73 20 20 20 20  | Glyn Davies    |
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00000190  20 20 20 20 20 20 20 20  20 20 20 4b 6e 6f 77 20  |           Know |
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000001c0  69 6c 65 20 0a 0a 20 20  20 20 20 20 20 20 20 20  |ile ..          |
000001d0  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
000001e0  20 69 6e 63 72 65 61 73  65 73 20 69 6e 20 6c 65  | increases in le|
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00000200  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
00000210  20 20 20 0a 0a 0a 0a 50  72 6f 67 72 61 6d 20 3a  |   ....Program :|
00000220  20 21 46 69 6c 65 43 68  65 63 6b 0a 0a 41 75 74  | !FileCheck..Aut|
00000230  68 6f 72 20 20 3a 20 47  6c 79 6e 20 44 61 76 69  |hor  : Glyn Davi|
00000240  65 73 20 20 0a 0a 50 75  72 70 6f 73 65 20 3a 20  |es  ..Purpose : |
00000250  4e 6f 74 69 66 79 20 75  73 65 72 20 69 66 20 21  |Notify user if !|
00000260  42 6f 6f 74 2c 20 21 52  75 6e 20 6f 72 20 21 52  |Boot, !Run or !R|
00000270  75 6e 49 6d 61 67 65 20  66 69 6c 65 73 20 69 6e  |unImage files in|
00000280  63 72 65 61 73 65 20 69  6e 20 73 69 7a 65 0a 61  |crease in size.a|
00000290  6e 64 20 72 65 6e 61 6d  65 20 6f 66 66 65 6e 64  |nd rename offend|
000002a0  69 6e 67 20 66 69 6c 65  73 2e 0a 0a 56 65 72 73  |ing files...Vers|
000002b0  69 6f 6e 20 3a 20 33 2e  30 31 20 41 75 67 75 73  |ion : 3.01 Augus|
000002c0  74 20 31 39 39 31 0a 0a  49 6e 74 72 6f 0a 0a 20  |t 1991..Intro.. |
000002d0  20 20 20 20 41 66 74 65  72 20 72 65 61 64 69 6e  |    After readin|
000002e0  67 20 6d 61 6e 79 20 61  72 74 69 63 6c 65 73 20  |g many articles |
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00000340  68 20 77 69 6c 6c 20 63  6f 70 79 20 69 74 27 73  |h will copy it's|
00000350  20 73 65 6c 66 20 66 72  6f 6d 20 6f 6e 65 20 0a  | self from one .|
00000360  61 70 70 6c 69 63 61 74  69 6f 6e 20 74 6f 20 20  |application to  |
00000370  61 6e 6f 74 68 65 72 2c  20 61 6e 64 20 64 69 73  |another, and dis|
00000380  63 6f 76 65 72 65 64 20  69 74 20 77 61 73 20 73  |covered it was s|
00000390  75 72 70 72 69 73 69 6e  67 6c 79 20 65 61 73 79  |urprisingly easy|
000003a0  2e 20 20 20 0a 0a 57 6f  72 72 69 65 64 20 61 62  |.   ..Worried ab|
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00000400  61 6e 20 61 6e 74 69 20  76 69 72 75 73 2c 20 61  |an anti virus, a|
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00000420  20 74 68 65 20 72 65 73  75 6c 74 2e 0a 0a 4e 2e  | the result...N.|
00000430  42 2e 20 54 68 65 20 76  69 72 75 73 20 72 65 66  |B. The virus ref|
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00000460  20 6f 62 6c 69 76 69 6f  6e 21 0a 20 20 20 20 20  | oblivion!.     |
00000470  20 20 20 20 20 20 20 20  20 20 20 20 20 20 28 53  |              (S|
00000480  6f 20 44 6f 6e 27 74 20  62 6c 61 6d 65 20 6d 65  |o Don't blame me|
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000004b0  72 6f 67 72 61 6d 20 77  61 69 74 73 20 66 6f 72  |rogram waits for|
000004c0  20 57 49 4d 50 20 6d 65  73 73 61 67 65 20 35 20  | WIMP message 5 |
000004d0  28 64 6f 75 62 6c 65 20  63 6c 69 63 6b 29 2c 20  |(double click), |
000004e0  77 68 65 6e 20 74 68 69  73 20 6f 63 63 75 72 73  |when this occurs|
000004f0  0a 69 74 20 63 68 65 63  6b 73 20 74 6f 20 73 65  |.it checks to se|
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00000540  20 70 72 6f 67 72 61 6d  20 6c 6f 6f 6b 73 20 66  | program looks f|
00000550  6f 72 20 74 68 65 20 33  20 6d 61 69 6e 20 61 70  |or the 3 main ap|
00000560  70 6c 69 63 61 74 69 6f  6e 20 66 69 6c 65 73 3a  |plication files:|
00000570  0a 20 20 20 20 20 20 20  20 20 21 52 75 6e 0a 20  |.         !Run. |
00000580  20 20 20 20 20 20 20 20  21 52 75 6e 49 6d 61 67  |        !RunImag|
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00000780  2d 2d 2d 3e 20 20 21 56  69 72 75 73 49 6d 67 0a  |--->  !VirusImg.|
00000790  0a 0a 54 68 65 20 75 73  65 72 20 69 73 20 6e 6f  |..The user is no|
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00000830  20 75 73 65 72 20 68 61  73 20 75 70 64 61 74 65  | user has update|
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00000850  20 73 69 6d 70 6c 79 20  64 72 61 67 20 74 68 65  | simply drag the|
00000860  20 21 3c 61 70 70 3e 20  74 6f 20 74 68 65 20 0a  | !<app> to the .|
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00000880  20 20 54 68 65 20 64 61  74 61 66 69 6c 65 20 69  |  The datafile i|
00000890  73 20 74 68 65 6e 20 75  70 64 61 74 65 64 2e 0a  |s then updated..|
000008a0  0a 4e 2e 42 2e 20 54 68  69 73 20 70 72 6f 67 72  |.N.B. This progr|
000008b0  61 6d 20 64 6f 65 73 20  6e 6f 74 20 61 74 74 65  |am does not atte|
000008c0  6d 70 74 20 74 6f 20 72  65 6d 6f 76 65 20 61 6e  |mpt to remove an|
000008d0  79 20 76 69 72 75 73 65  73 20 69 74 20 6d 65 72  |y viruses it mer|
000008e0  65 6c 79 20 61 74 74 65  6d 70 74 73 0a 74 6f 20  |ely attempts.to |
000008f0  70 72 65 76 65 6e 74 20  74 68 65 69 72 20 73 70  |prevent their sp|
00000900  72 65 61 64 2e 0a 0a 0a  49 66 20 79 6f 75 20 68  |read....If you h|
00000910  61 76 65 20 75 73 65 64  20 74 68 69 73 20 70 72  |ave used this pr|
00000920  6f 67 72 61 6d 20 74 6f  20 70 72 6f 74 65 63 74  |ogram to protect|
00000930  20 79 6f 75 72 20 73 79  73 74 65 6d 20 61 6e 64  | your system and|
00000940  20 69 66 20 69 74 20 68  61 73 20 77 6f 72 6b 65  | if it has worke|
00000950  64 20 0a 61 73 20 73 70  65 63 20 61 67 61 69 6e  |d .as spec again|
00000960  73 74 20 61 20 76 69 72  75 73 2c 20 49 20 77 6f  |st a virus, I wo|
00000970  75 6c 64 20 6c 69 6b 65  20 74 6f 20 68 65 61 72  |uld like to hear|
00000980  20 61 62 6f 75 74 20 69  74 2e 20 20 41 6e 79 20  | about it.  Any |
00000990  63 61 73 68 20 69 73 20  0a 77 65 6c 63 6f 6d 65  |cash is .welcome|
000009a0  2c 20 28 49 20 77 61 6e  74 20 74 6f 20 67 65 74  |, (I want to get|
000009b0  20 74 68 65 20 52 69 73  63 4f 53 20 70 72 6f 67  | the RiscOS prog|
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00000a10  74 20 72 65 6d 61 69 6e  73 20 6d 69 6e 65 20 68  |t remains mine h|
00000a20  6f 77 65 76 65 72 20 74  68 69 73 20 61 70 70 6c  |owever this appl|
00000a30  69 63 61 74 69 6f 6e 20  6d 61 79 20 62 65 20 66  |ication may be f|
00000a40  72 65 65 6c 79 20 64 69  73 74 72 69 62 75 74 65  |reely distribute|
00000a50  64 2c 0a 61 73 20 6c 6f  6e 67 20 61 73 20 69 74  |d,.as long as it|
00000a60  20 69 73 20 6e 6f 74 20  73 6f 6c 64 20 66 6f 72  | is not sold for|
00000a70  20 6d 6f 72 65 20 74 68  61 6e 20 74 77 6f 20 70  | more than two p|
00000a80  6f 75 6e 64 73 2e 0a 49  74 20 6d 61 79 20 6e 6f  |ounds..It may no|
00000a90  74 20 62 65 20 61 6c 74  65 72 65 64 20 69 6e 20  |t be altered in |
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00000ac0  61 66 69 6c 65 20 28 69  6e 20 63 61 73 65 20 0a  |afile (in case .|
00000ad0  61 6e 79 20 76 69 72 75  73 20 63 68 65 63 6b 73  |any virus checks|
00000ae0  20 66 6f 72 20 6d 69 6e  65 29 0a 0a 0a 49 66 20  | for mine)...If |
00000af0  79 6f 75 20 68 61 76 65  20 66 6f 75 6e 64 20 61  |you have found a|
00000b00  6e 79 20 62 75 67 73 20  28 77 68 61 74 3f 21 3f  |ny bugs (what?!?|
00000b10  29 20 6f 72 20 77 6f 75  6c 64 20 6c 69 6b 65 20  |) or would like |
00000b20  74 6f 20 64 6f 6e 61 74  65 20 74 6f 20 61 20 66  |to donate to a f|
00000b30  75 6e 64 20 0a 74 6f 20  68 65 6c 70 20 6d 65 20  |und .to help me |
00000b40  70 75 72 63 68 61 73 65  20 74 68 65 20 50 52 4f  |purchase the PRO|
00000b50  47 52 41 4d 45 52 53 20  52 45 46 45 52 45 4e 43  |GRAMERS REFERENC|
00000b60  45 20 4d 41 4e 55 41 4c  53 20 49 20 63 61 6e 20  |E MANUALS I can |
00000b70  62 65 20 72 65 61 63 68  65 64 20 61 74 20 3a 0a  |be reached at :.|
00000b80  0a 20 20 20 50 6c 61 73  20 45 79 74 6f 6e 2c 0a  |.   Plas Eyton,.|
00000b90  20 20 20 53 6f 6e 74 6c  65 79 2c 0a 20 20 20 57  |   Sontley,.   W|
00000ba0  72 65 78 68 61 6d 2c 0a  20 20 20 57 61 6c 65 73  |rexham,.   Wales|
00000bb0  2e 0a 20 20 20 4c 4c 31  33 30 59 44 0a 0a 20 20  |..   LL130YD..  |
00000bc0  20 20 20 20 20 20 20 20  20 0a 55 70 64 61 74 65  |         .Update|
00000bd0  3a 0a 20 20 20 20 20 33  2e 30 30 0a 0a 52 65 63  |:.     3.00..Rec|
00000be0  65 6e 74 6c 79 20 61 64  64 65 64 20 3a 0a 0a 4e  |ently added :..N|
00000bf0  6f 77 20 70 6c 61 79 73  20 54 52 41 43 4b 45 52  |ow plays TRACKER|
00000c00  20 6d 6f 64 75 6c 65 73  20 66 72 6f 6d 20 74 68  | modules from th|
00000c10  65 20 64 65 73 6b 74 6f  70 2e 0a 53 70 65 61 6b  |e desktop..Speak|
00000c20  65 72 20 4f 66 66 2f 4f  6e 0a 41 75 64 69 6f 20  |er Off/On.Audio |
00000c30  20 20 4f 66 66 2f 4f 6e  0a 50 61 75 73 65 20 20  |  Off/On.Pause  |
00000c40  20 4f 66 66 2f 4f 6e 0a  53 74 6f 70 0a 0a 54 52  | Off/On.Stop..TR|
00000c50  41 43 4b 45 52 27 73 20  61 72 65 20 6f 6e 6c 79  |ACKER's are only|
00000c60  20 70 6c 61 79 65 64 20  77 68 69 6c 73 74 20 21  | played whilst !|
00000c70  46 69 6c 65 43 68 65 63  6b 20 69 73 20 72 75 6e  |FileCheck is run|
00000c80  6e 69 6e 67 0a 0a 57 68  65 6e 20 65 72 72 6f 72  |ning..When error|
00000c90  73 20 6f 63 63 75 72 20  63 6c 69 63 6b 69 6e 67  |s occur clicking|
00000ca0  20 22 43 41 4e 43 4c 45  22 20 71 75 69 74 73 20  | "CANCLE" quits |
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00001050  74 68 65 20 75 73 65 72  73 20 63 68 6f 6f 73 65  |the users choose|
00001060  6e 20 64 61 74 61 66 69  6c 65 2c 20 77 68 65 6e  |n datafile, when|
00001070  20 70 61 73 73 69 6e 67  20 6f 6e 20 21 46 69 6c  | passing on !Fil|
00001080  65 43 68 65 63 6b 20 63  6f 70 79 20 74 68 65 20  |eCheck copy the |
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00001100  6f 75 6c 64 20 62 65 20  77 69 73 65 20 74 6f 20  |ould be wise to |
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00001130  68 65 72 20 0a 21 3c 61  70 70 3e 27 73 20 6f 6e  |her .!<app>'s on|
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000011a0  20 69 74 3f 29 0a 0a 49  20 77 69 6c 6c 20 61 63  | it?)..I will ac|
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000011c0  62 69 6c 69 74 79 20 66  6f 72 20 74 68 65 20 6c  |bility for the l|
000011d0  6f 73 73 20 6f 66 20 64  61 74 61 20 64 75 65 20  |oss of data due |
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00001200  43 68 65 63 6b 2c 20 49  74 20 69 73 20 73 75 70  |Check, It is sup|
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00001240  20 74 68 61 74 20 21 46  69 6c 65 43 68 65 63 6b  | that !FileCheck|
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00001270  64 69 6e 67 2c 20 72 65  6d 65 6d 62 65 72 20 69  |ding, remember i|
00001280  74 20 0a 6f 6e 6c 79 20  63 68 65 63 6b 73 20 21  |t .only checks !|
00001290  52 75 6e 2c 20 21 52 75  6e 49 6d 61 67 65 2c 20  |Run, !RunImage, |
000012a0  61 6e 64 20 21 42 6f 6f  74 2c 20 61 73 20 49 20  |and !Boot, as I |
000012b0  66 65 65 6c 20 74 68 65  79 20 61 72 65 20 74 68  |feel they are th|
000012c0  65 20 6d 6f 73 74 20 0a  76 75 6c 6e 65 72 61 62  |e most .vulnerab|
000012d0  6c 65 2e 0a 0a 0a 54 68  69 6e 67 73 20 49 20 69  |le....Things I i|
000012e0  6e 74 65 6e 64 20 74 6f  20 61 64 64 20 74 6f 2f  |ntend to add to/|
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00001300  68 65 63 6b 3a 0a 0a 42  75 67 20 66 69 78 65 73  |heck:..Bug fixes|
00001310  20 77 68 65 6e 20 49 20  61 6d 20 69 6e 66 6f 72  | when I am infor|
00001320  6d 65 64 20 6f 66 20 74  68 65 6d 2c 0a 0a 53 63  |med of them,..Sc|
00001330  61 6e 20 6f 66 20 64 69  73 63 73 2c 20 28 69 65  |an of discs, (ie|
00001340  20 61 6c 6c 6f 77 20 79  6f 75 20 74 6f 20 69 6e  | allow you to in|
00001350  73 65 72 74 73 20 61 20  64 69 73 63 20 61 6e 64  |serts a disc and|
00001360  20 21 46 69 6c 65 43 68  65 63 6b 20 77 69 6c 20  | !FileCheck wil |
00001370  63 68 65 63 6b 20 61 6c  6c 0a 20 20 20 20 20 20  |check all.      |
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00001390  3e 29 0a 0a 41 6e 79 20  6f 74 68 65 72 20 66 65  |>)..Any other fe|
000013a0  61 74 75 72 65 73 20 77  68 69 63 68 20 61 20 75  |atures which a u|
000013b0  73 65 72 20 73 75 67 67  65 73 74 73 2c 20 61 6e  |ser suggests, an|
000013c0  64 20 49 20 66 65 65 6c  20 77 6f 72 74 68 77 68  |d I feel worthwh|
000013d0  69 6c 65 0a 0a 0a 48 6f  70 65 20 79 6f 75 20 66  |ile...Hope you f|
000013e0  69 6e 64 20 74 68 69 73  20 75 73 65 66 75 6c 20  |ind this useful |
000013f0  47 6c 79 6e 20 44 61 76  69 65 73 20 41 75 67 75  |Glyn Davies Augu|
00001400  73 74 20 31 39 39 31 20                           |st 1991 |
00001408