Re: intermittent channel read problems

Well interesting, I finally boiled down the code to a simple C program
and also tested it again Solaris & Ubuntu. I've only seen it randomly
fail when connecting to a OS X machine. I've tested against both OS X
10.5 and OS X Server 10.4. So there's definitely something fishy when
connecting to OS X machine it seems, but other software doesn't seem
to have a problem.

You guys have any thoughts how to further investigate what might be
going on? I've attached the program I made to test this. When
connecting to an OS X machine, it'll sometimes fail to get data from a
command. The program runs a series of commands and if one of the
commands that should have data doesn't it spits out an extra caps
message saying it got 0 bytes when it shouldn't have. This sometimes
takes a couple runs before happening. It also occasionally will lock
on reading.

Hopefully can figure this out, thanks again. Hopefully the C isn't
too messy, haven't done much pure C in a while :)

--
Jeremy Knope / Software Developer / Ambrosia Software, Inc. -- http://www.AmbrosiaSW.com/
On Apr 14, 2009, at 5:27 PM, Jeremy Knope wrote:
> I'll see if I can get a boiled down version tomorrow, it's currently  
> in ObjC.  I was able to figure out how to do something similar to  
> 'strace' on OS X via 'dtruss' which uses dtrace to do a trace of  
> system calls.  If it's at all helpful, attached is a trace of a  
> successful 'ls -lL' command and then one where i get no data, I put  
> some space & markers between the separate calls.
>
> I'll post a smaller sample app if I get it to have the same problem  
> in that form tomorrow.  Thanks for the help guys.  Hopefully can  
> figure out what's going on.  Very possible something weird I'm  
> doing :)
> <sshd-trace.txt>
> --
> Jeremy Knope / Software Developer / Ambrosia Software, Inc. -- http://www.AmbrosiaSW.com/
>
>
>
>
> On Apr 14, 2009, at 5:18 PM, Daniel Stenberg wrote:
>
>> On Tue, 14 Apr 2009, Jeremy Knope wrote:
>>
>>> Any help is appreciated, if you need to see some code, would you
>>> prefer it on a paste site or just attached?
>>
>> Yes, preferably I'd like to see a complete small app written in  
>> portable C
>> that we can use in our ends to repeat this problem...
>>
>> -- 
>>
>> / daniel.haxx.se
>>
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