RFR [8023130] (process) ProcessBuilder#inheritIO does not work on Windows

Alan Bateman Alan.Bateman at oracle.com
Fri Aug 23 10:28:17 UTC 2013

On 23/08/2013 04:07, Ivan Gerasimov wrote:
> Hello everybody!
> The method ProcessBuilder#inheritIO() is reported to not have any 
> effect on Windows platform.
> The same story is with redirectOutput/Input/Error(Redirect.INHERIT) 
> methods.
> As the result, standard in/out/err aren't inherited.
> It turn out that the culprit is the CREATE_NO_WINDOW flag passed to 
> CreateProcessW().
> MS doc says about this flag: "The process is a console application 
> that is being run without a console window."
> CREATE_NO_WINDOW flag was added with the fix for 
> http://bugs.sun.com/view_bug.do?bug_id=4244515 to suppress a console 
> window on a newly created process, when it is created from a program 
> launched with javaw.exe.
> Thus, I left this flag only for cases when the program doesn't have a 
> console associated with it.
> Would you please help review a fix for this problem?
> BUGURL: http://bugs.sun.com/view_bug.do?bug_id=8023130
> WEBREV: http://cr.openjdk.java.net/~igerasim/8023130/0/webrev/
Good sleuthing!

Just so I understand, if we have a console (DOS command window for 
example) then will dropping CREATE_NO_WINDOW result in a new window or not?

One thing that it does highlight is that the coverage for inherit in 
ProcessBuilder/Basic.java was not sufficient as this should have been 
caught a long time ago. My preference would be to add to this test 
rather than introduce a new one (ProcessBuilder.java is Martin's 
original mother-of-all tests for ProcessBuilder).


More information about the core-libs-dev mailing list