Bugs item #2558794, was opened at 2009-02-03 00:14
Message generated for change (Comment added) made by nobody
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Category: API
Group: None
Status: Open
Resolution: None
Priority: 7
Private: No
Submitted By: William Boyle (vtcool)
Assigned to: Nobody/Anonymous (nobody)
Summary: libssh2_poll returns 0 sometimes when using select

Initial Comment:
I have encountered an issue where if polling a exec channel for a command like 
"netstat -a" with libssh2_poll that in some command execution runs, the 
libssh2_poll will always return 0 and will never change on subsequent polls of 
the same function on Windows 2003 server.

I have structured my reads to do something like the following:

1) Execute command 
2) Read channel first
3) Check if libssh2_poll for availability of data on the channel. If the rc is 
0, loop until we get something greater than 0.
4) Continue to read from step 1.

However, in the particular cases where the code execution doesn't successfully 
return, I get a rc > 0 until a 0 is hit and then it remains 0. I have narrowed 
it down to the socket select() function on Windows 2003, but am unable to 
understand why there would be no data available when there is really data 
available. To me it would seem select() is behaving incorrectly. 



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Comment By: Nobody/Anonymous (nobody)
Date: 2009-02-03 01:25

Message:
You're not the first to observe that Windows and select() are not the best
of friends.

//Peter <pe...@stuge.se>


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