Issue #3013 has been updated by Ricky Zhou.

Markus Roberts wrote:
> One point though--unless I'm mistaken, even if the select works we have no 
> assurance that there will be 4096 bytes available, so we could easily hang 
> there waiting for more data (or an EOF) that will never come. 
> 
> I'm not thrilled with the byte at a time solution either, but at least in the 
> case where we resort to sysread I see no good alternative.

With a pipe, if there are less than 4096 bytes available, read will return 
after reading just those bytes, so I don't think you need to worry about 
blocking.

Leaving the tempfile for 0.25.3 sounds fine.  I'll try to look into race 
conditions with the select solution (perhaps we need to do a select + read 
after the waitpid to empty the buffer as well).
----------------------------------------
Bug #3013: util.rb:execute broken on Ruby <1.8.3
http://projects.reductivelabs.com/issues/3013

Author: Ricky Zhou
Status: Code Insufficient
Priority: Urgent
Assigned to: Markus Roberts
Category: exec
Target version: 0.25.3
Affected version: 0.25.2
Keywords: 
Branch: http://github.com/MarkusQ/puppet/tree/ticket/0.25.x/3013


Apparently the patch in ticket #2731 introduced one more issue by using 
readpartial, which isn't available until ruby 1.8.3 (RHEL4 at least is 
affected).  I'm not sure how this is normally handled in ruby, but if the 
readpartial function is not available, the code should fall back to sysread 
(along with some code for handling EINTR).

Anybody with better ruby knowledge know how this should be done?


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