Home » Archimedes archive » Micro User » MU 1991-06.adf » PD-Stuff » Utilities/!FileCheck/!Help/Readme
Utilities/!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 1991-06.adf » PD-Stuff |
| Filename: | Utilities/!FileCheck/!Help/Readme |
| Read OK: | ✔ |
| File size: | 0AE0 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 : 2.00 March 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. My Virus stays locked in my disc box!
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 files:
!Runlen
!Bootlen
!Imagelen
If any of the standard files (!Run, !RunImage, !Boot) are not present
it does not look for its accompanying data file.It then finds the length
of the WIMP files and loads the data of their original length.
If 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 has decreased then the data files are updated.
If the file size is unchanged then the datafiles are left unchanged.
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 datafiles (in case
any virus checks for mine)
I can be reached at :
Plas Eyton,
Sontley,
Wrexham,
Wales.
LL130YD
Help Util by Loring (TA.)
Recomended book 'ARCHIMEDES ASSEMBLY LANGUAGE'
00000000 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |.***************| 00000010 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 20 43 |************** C| 00000020 6f 70 79 72 69 67 68 74 20 4e 6f 74 69 63 65 20 |opyright Notice | 00000030 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| 00000040 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a 2a 20 20 |************.* | 00000050 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000090 20 20 20 20 20 20 20 2a 0a 2a 20 20 20 20 20 20 | *.* | 000000a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000000b0 20 20 20 20 28 63 29 20 31 39 39 31 20 47 6c 79 | (c) 1991 Gly| 000000c0 6e 20 44 61 76 69 65 73 20 20 20 20 20 20 20 20 |n Davies | 000000d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000000e0 20 20 20 2a 0a 2a 20 20 20 20 20 20 20 20 20 20 | *.* | 000000f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 00000120 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 2a | *| 00000130 0a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |.***************| 00000140 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 00000170 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0a 0a 0a 20 |************... | 00000180 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000190 20 4b 6e 6f 77 20 69 66 20 61 20 21 52 75 6e 2c | Know if a !Run,| 000001a0 20 21 42 6f 6f 74 2c 20 6f 72 20 21 52 75 6e 49 | !Boot, or !RunI| 000001b0 6d 61 67 65 20 66 69 6c 65 20 0a 0a 20 20 20 20 |mage file .. | 000001c0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 000001d0 20 20 20 20 20 20 20 69 6e 63 72 65 61 73 65 73 | increases| 000001e0 20 69 6e 20 6c 65 6e 67 74 68 0a 0a 20 20 20 20 | in length.. | 000001f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | 00000200 20 20 20 20 20 20 20 20 20 0a 0a 0a 0a 50 72 6f | ....Pro| 00000210 67 72 61 6d 20 3a 20 21 46 69 6c 65 43 68 65 63 |gram : !FileChec| 00000220 6b 0a 0a 41 75 74 68 6f 72 20 20 3a 20 47 6c 79 |k..Author : Gly| 00000230 6e 20 44 61 76 69 65 73 0a 0a 50 75 72 70 6f 73 |n Davies..Purpos| 00000240 65 20 3a 20 4e 6f 74 69 66 79 20 75 73 65 72 20 |e : Notify user | 00000250 69 66 20 21 42 6f 6f 74 2c 20 21 52 75 6e 20 6f |if !Boot, !Run o| 00000260 72 20 21 52 75 6e 49 6d 61 67 65 20 66 69 6c 65 |r !RunImage file| 00000270 73 20 69 6e 63 72 65 61 73 65 20 69 6e 20 73 69 |s increase in si| 00000280 7a 65 0a 61 6e 64 20 72 65 6e 61 6d 65 20 6f 66 |ze.and rename of| 00000290 66 65 6e 64 69 6e 67 20 66 69 6c 65 73 2e 0a 0a |fending files...| 000002a0 56 65 72 73 69 6f 6e 20 3a 20 32 2e 30 30 20 4d |Version : 2.00 M| 000002b0 61 72 63 68 20 31 39 39 31 0a 0a 49 6e 74 72 6f |arch 1991..Intro| 000002c0 0a 0a 20 20 20 20 20 41 66 74 65 72 20 72 65 61 |.. After rea| 000002d0 64 69 6e 67 20 6d 61 6e 79 20 61 72 74 69 63 6c |ding many articl| 000002e0 65 73 20 61 62 6f 75 74 20 76 69 72 75 73 65 73 |es about viruses| 000002f0 20 6f 6e 20 74 68 65 20 41 63 6f 72 6e 20 41 72 | on the Acorn Ar| 00000300 63 68 69 6d 65 64 65 73 20 49 0a 73 65 74 20 61 |chimedes I.set a| 00000310 62 6f 75 74 20 74 72 79 69 6e 67 20 74 6f 20 77 |bout trying to w| 00000320 72 69 74 65 20 61 20 70 72 6f 67 72 61 6d 20 77 |rite a program w| 00000330 68 69 63 68 20 77 69 6c 6c 20 63 6f 70 79 20 69 |hich will copy i| 00000340 74 27 73 20 73 65 6c 66 20 66 72 6f 6d 20 6f 6e |t's self from on| 00000350 65 20 0a 61 70 70 6c 69 63 61 74 69 6f 6e 20 74 |e .application t| 00000360 6f 20 20 61 6e 6f 74 68 65 72 2c 20 61 6e 64 20 |o another, and | 00000370 64 69 73 63 6f 76 65 72 65 64 20 69 74 20 77 61 |discovered it wa| 00000380 73 20 73 75 72 70 72 69 73 69 6e 67 6c 79 20 65 |s surprisingly e| 00000390 61 73 79 2e 20 20 20 0a 0a 57 6f 72 72 69 65 64 |asy. ..Worried| 000003a0 20 61 62 6f 75 74 20 74 68 69 73 20 49 20 20 75 | about this I u| 000003b0 73 65 64 20 74 68 65 20 6b 6e 6f 77 6c 65 64 67 |sed the knowledg| 000003c0 65 20 74 68 61 74 20 49 20 68 61 64 20 67 61 69 |e that I had gai| 000003d0 6e 65 64 20 69 6e 20 77 72 69 74 69 6e 67 0a 20 |ned in writing. | 000003e0 61 20 27 76 69 72 75 73 27 20 74 6f 20 77 72 69 |a 'virus' to wri| 000003f0 74 65 20 61 6e 20 61 6e 74 69 20 76 69 72 75 73 |te an anti virus| 00000400 2c 20 61 6e 64 20 21 46 69 6c 65 43 68 65 63 6b |, and !FileCheck| 00000410 20 69 73 20 74 68 65 20 72 65 73 75 6c 74 2e 0a | is the result..| 00000420 0a 4e 2e 42 2e 20 4d 79 20 56 69 72 75 73 20 73 |.N.B. My Virus s| 00000430 74 61 79 73 20 6c 6f 63 6b 65 64 20 69 6e 20 6d |tays locked in m| 00000440 79 20 64 69 73 63 20 62 6f 78 21 0a 0a 0a 0a 0a |y disc box!.....| 00000450 48 6f 77 20 69 74 20 64 6f 65 73 20 69 74 21 0a |How it does it!.| 00000460 0a 20 20 20 20 54 68 65 20 70 72 6f 67 72 61 6d |. The program| 00000470 20 77 61 69 74 73 20 66 6f 72 20 57 49 4d 50 20 | waits for WIMP | 00000480 6d 65 73 73 61 67 65 20 35 20 28 64 6f 75 62 6c |message 5 (doubl| 00000490 65 20 63 6c 69 63 6b 29 2c 20 77 68 65 6e 20 74 |e click), when t| 000004a0 68 69 73 20 6f 63 63 75 72 73 0a 69 74 20 63 68 |his occurs.it ch| 000004b0 65 63 6b 73 20 74 6f 20 73 65 65 20 69 66 20 61 |ecks to see if a| 000004c0 6e 20 61 70 70 6c 69 63 61 74 69 6f 6e 20 69 73 |n application is| 000004d0 20 74 68 65 20 6f 62 6a 65 63 74 20 6f 66 20 74 | the object of t| 000004e0 68 65 20 64 6f 75 62 6c 65 20 63 6c 69 63 6b 20 |he double click | 000004f0 74 68 65 6e 0a 74 68 65 20 20 20 70 72 6f 67 72 |then.the progr| 00000500 61 6d 20 6c 6f 6f 6b 73 20 66 6f 72 20 74 68 65 |am looks for the| 00000510 20 33 20 6d 61 69 6e 20 61 70 70 6c 69 63 61 74 | 3 main applicat| 00000520 69 6f 6e 20 66 69 6c 65 73 3a 0a 20 20 20 20 20 |ion files:. | 00000530 20 20 20 20 21 52 75 6e 0a 20 20 20 20 20 20 20 | !Run. | 00000540 20 20 21 52 75 6e 49 6d 61 67 65 0a 20 20 20 20 | !RunImage. | 00000550 20 20 20 20 20 21 42 6f 6f 74 0a 20 20 20 20 0a | !Boot. .| 00000560 20 49 74 20 74 68 65 6e 20 6c 6f 6f 6b 73 20 66 | It then looks f| 00000570 6f 72 20 69 74 73 20 6f 77 6e 20 64 61 74 61 20 |or its own data | 00000580 66 69 6c 65 73 3a 20 0a 0a 20 20 20 20 20 20 20 |files: .. | 00000590 20 20 21 52 75 6e 6c 65 6e 0a 20 20 20 20 20 20 | !Runlen. | 000005a0 20 20 20 21 42 6f 6f 74 6c 65 6e 0a 20 20 20 20 | !Bootlen. | 000005b0 20 20 20 20 20 21 49 6d 61 67 65 6c 65 6e 0a 0a | !Imagelen..| 000005c0 20 49 66 20 61 6e 79 20 6f 66 20 74 68 65 20 73 | If any of the s| 000005d0 74 61 6e 64 61 72 64 20 66 69 6c 65 73 20 28 21 |tandard files (!| 000005e0 52 75 6e 2c 20 21 52 75 6e 49 6d 61 67 65 2c 20 |Run, !RunImage, | 000005f0 21 42 6f 6f 74 29 20 61 72 65 20 6e 6f 74 20 70 |!Boot) are not p| 00000600 72 65 73 65 6e 74 0a 69 74 20 64 6f 65 73 20 6e |resent.it does n| 00000610 6f 74 20 6c 6f 6f 6b 20 66 6f 72 20 69 74 73 20 |ot look for its | 00000620 61 63 63 6f 6d 70 61 6e 79 69 6e 67 20 64 61 74 |accompanying dat| 00000630 61 20 66 69 6c 65 2e 49 74 20 74 68 65 6e 20 66 |a file.It then f| 00000640 69 6e 64 73 20 74 68 65 20 6c 65 6e 67 74 68 20 |inds the length | 00000650 0a 6f 66 20 74 68 65 20 57 49 4d 50 20 66 69 6c |.of the WIMP fil| 00000660 65 73 20 61 6e 64 20 6c 6f 61 64 73 20 74 68 65 |es and loads the| 00000670 20 64 61 74 61 20 6f 66 20 74 68 65 69 72 20 6f | data of their o| 00000680 72 69 67 69 6e 61 6c 20 6c 65 6e 67 74 68 2e 0a |riginal length..| 00000690 0a 49 66 20 74 68 65 20 66 69 6c 65 73 20 68 61 |.If the files ha| 000006a0 76 65 20 69 6e 63 72 65 61 73 65 64 20 69 6e 20 |ve increased in | 000006b0 73 69 7a 65 20 74 68 65 6e 20 74 68 65 79 20 61 |size then they a| 000006c0 72 65 20 72 65 6e 61 6d 65 64 3a 0a 0a 21 52 75 |re renamed:..!Ru| 000006d0 6e 20 20 20 20 20 20 2d 2d 2d 3e 20 20 21 56 69 |n ---> !Vi| 000006e0 72 75 73 72 75 6e 0a 21 42 6f 6f 74 20 20 20 20 |rusrun.!Boot | 000006f0 20 2d 2d 2d 3e 20 20 21 56 69 72 75 73 62 6f 6f | ---> !Virusboo| 00000700 74 0a 21 52 75 6e 49 6d 61 67 65 20 2d 2d 2d 3e |t.!RunImage --->| 00000710 20 20 21 56 69 72 75 73 49 6d 67 0a 0a 0a 54 68 | !VirusImg...Th| 00000720 65 20 75 73 65 72 20 69 73 20 6e 6f 74 69 66 69 |e user is notifi| 00000730 65 64 20 6f 66 20 74 68 69 73 20 61 6e 64 20 73 |ed of this and s| 00000740 68 6f 75 6c 64 20 74 68 65 6e 20 65 78 61 6d 69 |hould then exami| 00000750 6e 65 20 74 68 65 20 6f 66 66 65 6e 64 69 6e 67 |ne the offending| 00000760 20 66 69 6c 65 2f 73 2e 20 0a 20 0a 49 66 20 74 | file/s. . .If t| 00000770 68 65 20 66 69 6c 65 20 73 69 7a 65 20 68 61 73 |he file size has| 00000780 20 64 65 63 72 65 61 73 65 64 20 74 68 65 6e 20 | decreased then | 00000790 74 68 65 20 64 61 74 61 20 66 69 6c 65 73 20 61 |the data files a| 000007a0 72 65 20 75 70 64 61 74 65 64 2e 0a 0a 49 66 20 |re updated...If | 000007b0 74 68 65 20 66 69 6c 65 20 73 69 7a 65 20 69 73 |the file size is| 000007c0 20 75 6e 63 68 61 6e 67 65 64 20 74 68 65 6e 20 | unchanged then | 000007d0 74 68 65 20 64 61 74 61 66 69 6c 65 73 20 61 72 |the datafiles ar| 000007e0 65 20 6c 65 66 74 20 75 6e 63 68 61 6e 67 65 64 |e left unchanged| 000007f0 2e 0a 0a 0a 4e 2e 42 2e 20 54 68 69 73 20 70 72 |....N.B. This pr| 00000800 6f 67 72 61 6d 20 64 6f 65 73 20 6e 6f 74 20 61 |ogram does not a| 00000810 74 74 65 6d 70 74 20 74 6f 20 72 65 6d 6f 76 65 |ttempt to remove| 00000820 20 61 6e 79 20 76 69 72 75 73 65 73 20 69 74 20 | any viruses it | 00000830 6d 65 72 65 6c 79 20 61 74 74 65 6d 70 74 73 0a |merely attempts.| 00000840 74 6f 20 70 72 65 76 65 6e 74 20 74 68 65 69 72 |to prevent their| 00000850 20 73 70 72 65 61 64 2e 0a 0a 0a 49 66 20 79 6f | spread....If yo| 00000860 75 20 68 61 76 65 20 75 73 65 64 20 74 68 69 73 |u have used this| 00000870 20 70 72 6f 67 72 61 6d 20 74 6f 20 70 72 6f 74 | program to prot| 00000880 65 63 74 20 79 6f 75 72 20 73 79 73 74 65 6d 20 |ect your system | 00000890 61 6e 64 20 69 66 20 69 74 20 68 61 73 20 77 6f |and if it has wo| 000008a0 72 6b 65 64 20 0a 61 73 20 73 70 65 63 20 61 67 |rked .as spec ag| 000008b0 61 69 6e 73 74 20 61 20 76 69 72 75 73 2c 20 49 |ainst a virus, I| 000008c0 20 77 6f 75 6c 64 20 6c 69 6b 65 20 74 6f 20 68 | would like to h| 000008d0 65 61 72 20 61 62 6f 75 74 20 69 74 2e 20 20 41 |ear about it. A| 000008e0 6e 79 20 63 61 73 68 20 69 73 20 0a 77 65 6c 63 |ny cash is .welc| 000008f0 6f 6d 65 2c 20 49 20 77 61 6e 74 20 74 6f 20 67 |ome, I want to g| 00000900 65 74 20 74 68 65 20 52 69 73 63 4f 53 20 70 72 |et the RiscOS pr| 00000910 6f 67 72 61 6d 6d 65 72 73 20 72 65 66 65 72 65 |ogrammers refere| 00000920 6e 63 65 20 6d 61 6e 75 61 6c 73 2c 20 62 75 74 |nce manuals, but| 00000930 20 61 73 20 79 65 74 0a 63 61 73 68 66 6c 6f 77 | as yet.cashflow| 00000940 20 69 73 20 61 74 20 61 6e 20 61 6c 6c 20 74 69 | is at an all ti| 00000950 6d 65 20 6c 6f 77 2e 0a 0a 43 6f 70 79 72 69 67 |me low...Copyrig| 00000960 68 74 20 72 65 6d 61 69 6e 73 20 6d 69 6e 65 20 |ht remains mine | 00000970 68 6f 77 65 76 65 72 20 74 68 69 73 20 61 70 70 |however this app| 00000980 6c 69 63 61 74 69 6f 6e 20 6d 61 79 20 62 65 20 |lication may be | 00000990 66 72 65 65 6c 79 20 64 69 73 74 72 69 62 75 74 |freely distribut| 000009a0 65 64 2c 0a 61 73 20 6c 6f 6e 67 20 61 73 20 69 |ed,.as long as i| 000009b0 74 20 69 73 20 6e 6f 74 20 73 6f 6c 64 20 66 6f |t is not sold fo| 000009c0 72 20 6d 6f 72 65 20 74 68 61 6e 20 74 77 6f 20 |r more than two | 000009d0 70 6f 75 6e 64 73 2e 0a 49 74 20 6d 61 79 20 6e |pounds..It may n| 000009e0 6f 74 20 62 65 20 61 6c 74 65 72 65 64 20 69 6e |ot be altered in| 000009f0 20 61 6e 79 20 77 61 79 20 65 78 63 65 70 74 20 | any way except | 00000a00 74 6f 20 72 65 6e 61 6d 65 20 74 68 65 20 64 61 |to rename the da| 00000a10 74 61 66 69 6c 65 73 20 28 69 6e 20 63 61 73 65 |tafiles (in case| 00000a20 20 0a 61 6e 79 20 76 69 72 75 73 20 63 68 65 63 | .any virus chec| 00000a30 6b 73 20 66 6f 72 20 6d 69 6e 65 29 0a 0a 0a 49 |ks for mine)...I| 00000a40 20 63 61 6e 20 62 65 20 72 65 61 63 68 65 64 20 | can be reached | 00000a50 61 74 20 3a 0a 0a 20 20 20 50 6c 61 73 20 45 79 |at :.. Plas Ey| 00000a60 74 6f 6e 2c 0a 20 20 20 53 6f 6e 74 6c 65 79 2c |ton,. Sontley,| 00000a70 0a 20 20 20 57 72 65 78 68 61 6d 2c 0a 20 20 20 |. Wrexham,. | 00000a80 57 61 6c 65 73 2e 0a 20 20 20 4c 4c 31 33 30 59 |Wales.. LL130Y| 00000a90 44 0a 0a 20 20 20 48 65 6c 70 20 55 74 69 6c 20 |D.. Help Util | 00000aa0 62 79 20 4c 6f 72 69 6e 67 20 28 54 41 2e 29 0a |by Loring (TA.).| 00000ab0 0a 52 65 63 6f 6d 65 6e 64 65 64 20 62 6f 6f 6b |.Recomended book| 00000ac0 20 27 41 52 43 48 49 4d 45 44 45 53 20 41 53 53 | 'ARCHIMEDES ASS| 00000ad0 45 4d 42 4c 59 20 4c 41 4e 47 55 41 47 45 27 0a |EMBLY LANGUAGE'.| 00000ae0
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