build output/logging buffering?

[David Holmes]

On 30/06/2012 10:39 AM, Kelly O'Hair wrote:
> That logger.sh script is doing some strange buffering to fd 3 somehow.
> I'd never see that used before.
>
>     http://hg.openjdk.java.net/build-infra/jdk8/file/ccfffd988af6/common/bin/logger.sh

Don't know about the fd 3 but maybe it is the subshell that introduces 
the buffering ?

David

>
> -kto
>
> On Jun 29, 2012, at 2:57 PM, Erik Joelsson wrote:
>
>> This problem was new to me. It seems strange that stderr and stdout would behave differently. Both are piped through a separate instance of 'tee' to preserver the separation on the console, but to get both into the logfile.
>>
>> /Erik
>>
>> On 2012-06-28 20:16, David Holmes wrote:
>>> I see that a build will create a build.log by default. I also see I can set VERBOSE= to get back to the older more verbose style of output (eg full compilation commands etc).
>>>
>>> But it seems that due to the logging there is some buffering taking place that prevents me from seeing the most recent build output while it is running. I just had a problem where due to a mistyped variable I did a "cd " and then starting trawling my entire home directory, but I couldn't see this in the build output, ie no "cd " was visible, presumably because the output was being buffered.
>>>
>>> What I did see, which gave me the hint were a bunch of warnings that presumably went to stderr, not stdout and do did not get buffered.
>>>
>>> David
>>
>