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

[Tim Fadden]

On 1/2/2010 3:48 PM, Joel Ewy wrote:
> 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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>
>
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>
Joel,

I don't know anything about head, but I got tail.  Want me to email it 
to ya?  scred might work for ya to, go to the section you want, cut the 
chunk to a buffer and then write it to a new file.

Any way,  I have tail.  :-)


Tim Fadden