[Coco] 'head' and 'tail' for CoCo OS-9?

[Joel Ewy]

Joel Ewy wrote:
> Gene Heskett wrote:
>> On Saturday 02 January 2010, Joel Ewy wrote:
>>  
>>> Surely somebody has made these useful utils...  I can't find them on 
>>> any
>>> of my old floppies, or on RTSI, Maltedmedia, or any other source of 
>>> CoCo
>>> goodies.
>>>
>>> Ideas?
>>>
>>> JCE
>>>     
>>
>> If the file locking still works correctly in the newer versions of 
>> nitros9, list makes a reasonable substitute.  It tmode pause is on, 
>> you have a head, and if its off, and you've started an assembly that 
>> is making its listing, then that listing can be read in very close to 
>> real time with list, which will read the file till it runs into the 
>> currently locked by the assembler sector, and will dutifully wait 
>> till that sector is written and unlocked, reading it when it can gain 
>> access.
>>
>> There is a slight gap between the assemblers unlocking that sector 
>> and locking the next as it writes, so there is an about 1 in a 
>> thousand chance that list will read beyond the write, but you'll have 
>> to play with it, a lot, to get exactly the timing glitch to effect a 
>> list.  Only with faster hard drives was I ever able to trigger it, 
>> never when working on floppy's.
>>   
>
> I'm not sure that will quite do what I want, Gene.  I'm trying to 
> shave a few hundred bytes off the end of binary files.  Maybe I can 
> figure out how to make 'ded' do it for me.  I actually found a 'tail' 
> program on one of my old CoCo disks, but it's 'head' I need.
>

Maybe I'd better restate the last part of that sentence before I get any 
snide comments...  I still require the 'head' utility, or something like 
it.  :)

JCE
> JCE
>
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>>
>>
>>   
>
>
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