[pclasses-devel] before i write an io plugin...

[stephan b. <st...@s1...>]

Am i understanding this properly?

i want to implement a pio_ssh plugin. Looking at pio_file as a basis, it 
would appear that i need to do something like this:

Implement IORequest_xxx_Ssh for each type.

zB:

class IORequest_xxx_Ssh ... {

open():
  - open an ssh pipe and tie it to my IOHandler.
    Command passed to ssh depends on type of IORequest:
    GET = 'ssh -C user@host "cat /path/to/file"'
    PUT = 'ssh -C user@host "cat > /path/to/file"'
    and so on...

receive(buff,count):
  - read count bytes from my IOHandler. This is
    potentially bad if IOHandler blocks, of course.

write():
  - write data to my iohandler


close():
  - Send EOF to iohandler. (How? i can't write(0,0) to it, can i?)
    Delete the IOH? Does this object own it?
    That's not clear looking at the API.
    If the handler does not own it, is there
    any chance of changing IORequest(IOHandler*)
    to IORequest(IOHandler&), to make ownership
    obvious?


};

ssh-based virtual filesystem :). KDE implements one using the 'fish' 
protocol and a clever perl script which gets uploaded to the remote 
side and acts as a translater between remote commands and the local 
ssh. Pretty clever stuff. i guess i could write a fish-compatible 
IORequest, instead, since that's an established protocol.


Anyway - am i understanding the architecture properly? Are there any 
pitfalls i need to be aware of?


-- 
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"...pleasure is a grace and is not obedient to the commands
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