shell

Luis luis at anachreon.co.uk
Tue Jan 19 03:50:09 CST 2010


He he.. U is for User...

The protocol is is 'Unreliable' in the sense that there is very  
little in the way of guaranteeing data integrity, more like a shotgun  
approach to data transmission.
It relieves some of the TCP overhead which is why some online games  
use UDP instead of TCP to reduce latency. Any occasional hiccup is  
tolerated by the User.

Cheers,

Luis.


On 18 Jan 2010, at 20:18, Andre Garzia wrote:

> be aware of the U in UDP... it means unreliable.
>
> Is there any reason for UDP and not TCP?
>
> (PS: haven't read the previous thread, I am just saying that  
> because last
> time I coded with UDP I ended up having some very interesting  
> experience
> with duplicated datagrams and dropped datagrams)
>
> On Mon, Jan 18, 2010 at 6:13 PM, stephen barncard <
> stephenREVOLUTION2 at barncard.com> wrote:
>
>> Alex Tweedly has a sample UDP (datagram) stack at Rev Online
>> -------------------------
>> Stephen Barncard
>> San Francisco
>> http://houseofcubes.com/disco.irev
>>
>>
>> 2010/1/18 Hershel Fisch <hershrev at syp2u4c.com>
>>
>>> Hi, after knocking my head against the wall I decided to try to  
>>> go via
>>> sockets, but I have some misunderstandings for unpredicted  
>>> behavior, now
>> my
>>> questions if somebody could give a full statement example?
>>> Thanks, Hershel
>>>
>>>
>>> On 1/7/10 5:12 AM, "Bernard Devlin" <bdrunrev at gmail.com> wrote:
>>>
>>>> Hi Herschel,
>>>>
>>>> I am unfamiliar with Hylafax.  I don't think "shell" is going to  
>>>> cut
>>>> it for your needs.  What you may need is "open process", "write to
>>>> process" and "read from process".  Open process is kind of like
>>>> opening a non-visible terminal, where the state of the program  
>>>> opened
>>>> as a process persists throughout your read/write interactions  
>>>> with it.
>>>>
>>>> If you have a CLI client for hylafax for OS X & Windows, then  
>>>> you can
>>>> use that as the process to open.  If the only CLI client you  
>>>> have for
>>>> hylafax is on the server, then you will need to run remote  
>>>> sessions to
>>>> the server.  On OS X you could try 'talking' to the remote hylafax
>>>> client via ssh opened via "open process".  If that works, you've  
>>>> got a
>>>> start.  On Windows you would then have to use something like plink
>>>> (part of the Putty suite of ssh programs for windows).
>>>>
>>>> A final option might be to use the Expect program locally to  
>>>> talk to
>>>> the remote hylafax client.  I have never used Expect, but I  
>>>> imagine it
>>>> would be more complex to use than "open process" + ssh.
>>>>
>>>> It's going to be convoluted, but it might work.
>>>>
>>>> Bernard
>>>>
>>>> On Wed, Jan 6, 2010 at 6:36 PM, Hershel Fisch  
>>>> <hershrev at syp2u4c.com>
>>> wrote:
>>>>> My server is FreeBSD or OSX, Client is OSX and Win.
>>>>>
>>>>>> What is the problem with writing multiple arguments?  Do you mean
>>>>>> multiple successive shell commands, or multiple arguments to one
>>>>>> program?
>>>>>
>>>>> I want to write a GUI to connect to the server. Now I see in  
>>>>> Rev, when
>> a
>>>>> shell command is issued its sent and returns the prompt, if I  
>>>>> need to
>>>>> respond to that prompt then it issues a different shell session  
>>>>> and
>> not
>>> a
>>>>> continuation of the previous one, e.g. I want to connect to a  
>>>>> server
>> or
>>>>> change user, put shell("su - userABC") it returns "password" that
>> means
>>> that
>>>>> it wants a password to continue now where and who can I provide a
>>> password
>>>>> it should continue the current session? In terminal I just type  
>>>>> it in
>>> and
>>>>> its done.
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>>>
>>>
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>
>
>
> -- 
> http://www.andregarzia.com All We Do Is Code.
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