[Coco] No easy rename on OS-9 ?

[Luis Antoniosi (CoCoDemus)]

it turns out that there is a mv on rtsi:

ftp://www.rtsi.com/OS9/OS9_6X09/UTILITIES/mv.ar

There is also a cp and a ls.


On Wed, Mar 26, 2014 at 5:09 PM, Gene Heskett <gheskett at wdtv.com> wrote:
> On Wednesday 26 March 2014 16:30:52 Luis Antoniosi (CoCoDemus) did opine:
>
>> I'm very disappointed to discover that there ain't no I$Rename on
>> OS-9. This is the reason the file becomes empty on cp/m wordstar save.
>> As it tries to rename the scratch file and doesn't find it, it makes a
>> new one. I was ignoring the BDOS rename call.
>>
>> The rename.asm from os-9 repo is pretty large. I can make a smaller
>> copy/delete but this is not the optimal solution and could run out of
>> space.
>>
>> As far I understood the rename.asm, it opens a directory raw file and
>> change the name on it ? Is that correct ? Is it safe with multi
>> threading doing this way ? What could be the other solution ? Using
>> fork to create a rename process ?
>
> I think so. One could fork the rename module.  But I just looked at
> rename.asm and while it may work, what its doing makes relatively little
> sense to me.
>
> In fact, if I find the time, I might re-write a new rename/mv utility.
>
> Basic outline:
> 1. allocate 3 $20 byte buffers, and 4 256 byte buffers. that won't be all,
> but the rest will be appended when the need arises.
> 2 strncpy old name to 256 byte buffer 1
> 3 strncpy new name to 256 byte buffer 2
> 4 save pwd
> 5 parse the 1st buffer to extract the ending filename
> 6 strncpy it to the first $20 byte buffer and the 3rd one too
> 7 parse the 2nd buffer to extract the ending filename
> 8 strncpy that to the 2nd $20 byte buffer.
> 9 parse the 1st 256 byte buffer to get the path to the directory
> 10 put that in 256 byte buffer 3
> 11 parse the 2nd 256 byte buffer for the path to that directory
> 12 save it in 256 byte buffer 4
> 13 set attrs for a directory and open the pathlist for 256 byte buffer 3
> 14 setup a read loop, using the 3rd buffer as cache to look for the name in
> buffer 1, or terminate with an E$FNF if not found.
> 15 when the match is found, strncpy 29 bytes from buffer 2 to buffer 3.
> You do not want to destroy the FD's address.
>
> Now, if NOT doing a move, seek back $20 bytes on that path and write the
> $20 bytes of buffer 3.  Clean up and go home.  If doing the move, null the
> first byte of buffer 1 and write its $20 bytes back instead.
>
> Now for the move. open the pathlist in the 2nd 256 byte buffer as a
> directory and seek to EOF.  Write the $20 bytes of buffer 3.  Close both
> directory files.  Then, just for S&G's fork a dsort against both pathlists,
> one at a time.
>
> Clean up and go home.
>
> Cheers, Gene
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
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>
>
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