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

[Joel Ewy]

Tim Fadden wrote:
> 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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>>
> 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
>

Thanks Tim, but I've found that I have 'tail' as well.  Turns out I 
don't need 'head' anyway because I can do it with 'ded'.  Sounds rather 
grim, but that's the situation.

JCE

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